WO2018101161A1 - Sealing device - Google Patents
Sealing device Download PDFInfo
- Publication number
- WO2018101161A1 WO2018101161A1 PCT/JP2017/042176 JP2017042176W WO2018101161A1 WO 2018101161 A1 WO2018101161 A1 WO 2018101161A1 JP 2017042176 W JP2017042176 W JP 2017042176W WO 2018101161 A1 WO2018101161 A1 WO 2018101161A1
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- WIPO (PCT)
- Prior art keywords
- ring
- valve body
- plate portion
- valve
- resin ring
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/24—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings with radially or tangentially compressed packing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
Definitions
- the present invention relates to a sealing device that shields an inner hole of a pipe and a space inside a valve box and prevents a fluid flow between them.
- this sealing mechanism includes a resin ring 101 disposed on the inner periphery of the housing 110 in which the inner peripheral hole 111 is formed, and an O-ring 102 disposed in the vicinity of the opening end portion of the inner peripheral hole 111.
- the O-ring 102 is disposed between the resin ring 101 and the step surface 112 in the vicinity of the opening end of the inner peripheral hole 111, and the resin ring 101 is directed toward the spherical or cylindrical valve body 120 by elastic force. Press.
- a flow path space through which fluid (for example, oil, water, refrigerant) flows is provided, and the flow path space opens at the opening 121.
- the valve body 120 is rotatable, and when the opening 121 communicates with the space 101 a inside the resin ring 101 and the inner peripheral hole 111 of the housing 110, the flow path space leads to the inner peripheral hole 111 or from the inner peripheral hole 111.
- the fluid can flow into the channel space.
- the opening 121 moves away from the inner peripheral hole 111 with the rotation of the valve body 120, the flow path is closed. At least when the opening 121 is overlapped with the inner peripheral hole 111, the resin ring 101 needs to come into contact with the outer surface of the valve body 120, so that fluid does not leak between the resin ring 101 and the valve body 120.
- FIG. 17 is a perspective view showing an example of the arrangement of the resin ring 101 and the valve body 120.
- the valve device in this figure is a multi-control valve.
- the valve body 120 is cylindrical, and a plurality of resin rings 101 corresponding to the plurality of openings 121 are provided.
- the resin ring 101 is fixed, and the valve body 120 is rotatable as indicated by an arrow. As the valve body 120 rotates, when the space inside the resin ring 101 overlaps the opening 121 of the flow path space 122 of the valve body 120, the fluid flows through the space 101 a inside the resin ring 101.
- the surface 101b on the valve body 120 side of the resin ring 101 is sealed between the resin ring 101 and the curved outer surface of the valve body 120, as shown in FIG. Have a curvature that conforms to the spherical or cylindrical outer shape.
- the valve body 120 is made of a hard material such as metal or PPS (polyphenylene sulfide) resin
- the resin ring 101 is made of a hard material having a low friction coefficient, such as polytetrafluoroethylene (PTFE).
- an object of the present invention is to provide a sealing device that can exhibit high sealing performance even when a resin ring formed of a hard material is used.
- a sealing device includes a valve box, a valve body having a curved outer surface and rotatably disposed in the valve box to control a fluid flow, and the valve box Used for a valve device comprising a pipe connected to or part of the valve box, and sealing between the inner hole of the pipe and the space outside the valve body and inside the valve box
- a device which is formed of a resin, is brought into contact with the outer surface of the valve body, and has a resin groove in which a circumferential groove is formed, and a part or the whole of the resin ring formed from an elastic body.
- a connecting portion that connects a part of the first plate part and a part of the second plate part, wherein the elastic ring is the first plate part of the resin ring.
- the sealing device of the present invention since the resin ring in which a part of the first plate part and a part of the second plate part are connected by the connecting part is used, it has a conventional substantially rectangular cross section. Compared with the resin ring, it is possible to reduce the thickness of the portion that is brought into close contact with the outer surface of the valve body and to increase its flexibility. As described above, since the portion that is brought into close contact with the outer surface of the valve body (that is, the second plate portion) is highly flexible, even if a resin ring formed of a hard material is used, the second portion with respect to the outer surface of the valve body is used. The adhesion of the plate part is high. And an elastic body ring presses a 2nd board part to the outer surface of a valve body with an elastic restoring force.
- the elastic ring is installed in a stepped portion formed at the end of the tube, and presses the entire resin ring toward the valve body.
- the elastic ring may be fitted in a circular groove formed in the step portion of the pipe.
- the elastic body ring is fitted in a circumferential groove between the first plate portion and the second plate portion of the resin ring, and the second plate portion is It presses toward a valve body and presses a 1st board part toward the level
- the connection part of the resin ring may connect the edge on the center hole side of the first plate part and the edge on the center hole side of the second plate part.
- the portion that is brought into close contact with the outer surface of the valve body (that is, the second plate portion) is highly flexible, even if a resin ring formed of a hard material is used, The adhesion of the second plate portion is high. And an elastic body ring presses the whole or a part of resin ring to the outer surface of a valve body with an elastic restoring force. Therefore, high sealing performance can be exhibited without manufacturing a curved surface that is brought into close contact with the outer surface of the valve body of the resin ring with strict dimensional tolerances.
- the sealing device which concerns on 1st Embodiment of this invention has a valve box, the valve body which has a curved outer surface, is arrange
- FIG. 1 is a cross-sectional view of a sealing device 1 according to a first embodiment of the present invention.
- the sealing device 1 includes a valve box 3, a pipe 4 connected to the valve box 3 or a part of the valve box 3 through which a fluid flows, and a valve disposed in the valve box 3 to control the flow of the fluid.
- the present invention is applied to a valve device including a body 6.
- the valve box 3, the pipe 4 and the valve body 6 are made of a hard material such as metal or PPS (polyphenylene sulfide) resin.
- the valve device to which the sealing device 1 is applied may be, for example, a valve device that supplies cooling water (refrigerant) of an internal combustion engine to a radiator, or a valve device that distributes oil of hydraulic equipment to a desired flow path. There may be other valve devices.
- the fluid controlled by the valve device may be a refrigerant or oil such as cooling water, but may be another fluid.
- the valve body 6 is rotatable in the valve box 3, and the flow rate of the fluid passing through the pipe 4 is adjusted with the rotation.
- FIG. 1 only a part of the valve box 3 and the valve body 6 is shown, but the valve body 6 has a spherical or cylindrical outer surface shape.
- the valve body 6 is rotatable along the arc direction as shown by the arrows in the figure.
- a flow path space 7 through which a fluid (for example, oil, water, refrigerant) flows is provided, and the flow path space 7 opens at an opening 8 that penetrates the wall of the valve body 6.
- a fluid for example, oil, water, refrigerant
- the fluid can flow from the flow path space 7 to the inner hole 5.
- the opening 8 is separated from the inner hole 5 as the valve body 6 rotates, the flow path between the flow path space 7 and the inner hole 5 is blocked. Further, the flow rate of the fluid is adjusted according to the degree of overlap between the opening 8 and the inner hole 5.
- the illustrated pipe 4 is provided downstream of the valve box 3, and the fluid passing through the valve box 3 passes through the pipe 4.
- the pipe 4 is provided upstream of the valve box 3, and the fluid passing through the pipe 4 is supplied to the valve box. 3 may be passed.
- the sealing device 1 is used to seal between the inner hole 5 of the tube 4 and the space 35 outside the valve body 6 and inside the valve box 3 to prevent fluid flow therebetween.
- the sealing device 1 includes a resin ring 10 and a pressing mechanism (O-ring 30 in this embodiment) that presses the entire resin ring 10 toward the valve body 6.
- the resin ring 10 is formed in an annular shape with resin.
- the resin ring 10 is formed of a hard material having a small friction coefficient.
- An example of a suitable material for the resin ring 10 is polytetrafluoroethylene (PTFE), but other resins may be used.
- the resin ring 10 includes a first plate portion 12, a second plate portion 14, and a connecting portion 16 that connects a part of the first plate portion 12 and a part of the second plate portion 14.
- the first plate portion 12 is a flat disc
- the second plate portion 14 is a curved disc
- the connecting portion 16 is a cylinder.
- the 1st board part 12, the 2nd board part 14, and the connection part 16 are arrange
- the resin ring 10 is formed with a central hole 18 extending along its central axis.
- the central hole 18 is arranged substantially coaxially in the inner hole 5 of the tube 4. Therefore, as described above, when the opening 8 of the valve body 6 overlaps with the center hole 18 of the resin ring 10 as the valve body 6 rotates, the inside of the tube 4 from the flow path space 7 through the center hole 18. The fluid can flow to the hole 5.
- a cutout that is, a circumferential groove 20 having a uniform depth (depth measured along the radial direction) is formed on the outer peripheral surface of the resin ring 10.
- the first plate portion 12 is disposed between the step portion 22 formed at the end portion of the tube 4 and the valve body 6.
- the second plate portion 14 faces the outer surface of the valve body 6 and is brought into close contact with the outer surface.
- the second plate portion 14 has a curved surface that conforms to the curved outer surface of the valve body 6, but the entire surface need not be in full contact with the valve body 6.
- the pressing mechanism is an O-ring (elastic body ring) 30 installed at the stepped portion 22 at the end of the tube 4.
- the O-ring 30 is a ring formed of an elastic body having a higher elasticity than the material of the resin ring 10, for example, an elastomer.
- the O-ring 30 is in contact with the first plate portion 12 of the resin ring 10 and presses the entire resin ring 10 toward the valve body 6 by an elastic restoring force.
- a circular groove 32 for receiving the O-ring 30 is formed in the stepped portion 22.
- the circular groove 32 is provided concentrically with the inner hole 5.
- the circular groove 32 is not necessarily provided.
- fluid can also exist in the space 35 outside the valve body 6 and inside the valve box 3.
- the resin ring 10 and the O-ring 30 cooperate to prevent the flow of fluid from the space 35 to the inner hole 5 of the tube 4 and vice versa. More specifically, even if there is a gap between the radially outer edge of the first plate portion 12 of the resin ring 10 and the wall portion of the tube 4 on the outer side, the first plate portion 12 will be described.
- An O-ring 30 interposed between the tube 4 and the end of the tube 4 shields the space 35 and the inner hole 5 of the tube 4. In this way, the O-ring 30 supplements the sealing performance of the resin ring 10.
- FIG. 2 is a partially enlarged sectional view of the sealing device of FIG.
- the resin ring 10 in which a part of the first plate part 12 and a part of the second plate part 14 are connected by the connecting part 16 since the resin ring 10 in which a part of the first plate part 12 and a part of the second plate part 14 are connected by the connecting part 16 is used, it has a conventional substantially rectangular cross section. Compared to the resin ring 101 (see FIG. 16), it is possible to reduce the thickness of the portion that is brought into close contact with the outer surface of the valve body 6 and increase its flexibility. As described above, since the portion that is brought into close contact with the outer surface of the valve body 6 (that is, the second plate portion 14) is highly flexible, even if the resin ring 10 formed of a hard material is used, the valve body 6 The adhesion of the second plate portion 14 to the outer surface is high.
- any portion of the second plate portion 14 is in close contact with the valve body 6. . Furthermore, since the flexibility of the second plate portion 14 is high, the second plate portion 14 can follow the outer surface of the valve body 6 even when the valve body 6 rotates. Therefore, high sealing performance can be exhibited without manufacturing a curved surface that is brought into close contact with the outer surface of the valve body 6 of the resin ring 10 with strict dimensional tolerances.
- the resin ring 10 has a hollow structure having a circumferential groove 20. Therefore, as shown by the arrow in FIG. 2, when pressure P is applied to the second plate portion 14 from the fluid in the space 35 outside the valve body 6 and inside the valve box 3, the second plate portion 14 is By contracting in the radial direction, the curved surface of the second plate portion 14 is more closely attached to the outer surface of the valve body 6.
- the circular groove 32 is formed in the stepped portion 22 at the end of the tube 4, and the O-ring 30 is fitted in the circular groove 32. Therefore, the O-ring 30 is fixed at a fixed position, and is compressed from the outside and the inside in the radial direction. For this reason, the O-ring 30 can apply a force toward the resin ring 10 in the circumferential direction to the resin ring 10 and appropriately press the resin ring 10 against the outer surface of the valve body 6.
- FIG. 3 shows a sealing device 40 according to a modification of the first embodiment of the present invention.
- the same reference numerals are used to indicate the same components as those in the first embodiment, and the components will not be described in detail.
- the sealing device 40 includes a resin ring 41 having a shape different from that of the first embodiment.
- the resin ring 41 includes a first plate portion 42 that is a flat disc, a second plate portion 44 that is a curved disc, and a portion of the first plate portion 42.
- a connecting portion 46 which is a cylinder connecting a part of the second plate portion 44.
- the 1st board part 42, the 2nd board part 44, and the connection part 46 are arrange
- the resin ring 41 is formed with a center hole 48 extending along the center axis.
- the central hole 48 is arranged substantially coaxially in the inner hole 5 of the tube 4. Therefore, when the opening 8 of the valve body 6 overlaps the center hole 48 of the resin ring 41 as the valve body 6 rotates, fluid flows from the flow path space 7 to the inner hole 5 of the tube 4 via the center hole 48. Can flow.
- a notch that is, a circumferential groove 50 having a uniform depth (depth measured along the radial direction) is formed on the inner peripheral surface of the resin ring 41.
- the first plate portion 42 is disposed between the step portion 22 formed at the end portion of the tube 4 and the valve body 6.
- the second plate portion 44 faces the outer surface of the valve body 6 and is brought into close contact with the outer surface.
- the second plate portion 44 has a curved surface that conforms to the curved outer surface of the valve body 6, but the entire surface need not be in full contact with the valve body 6.
- FIG. 4 is a partially enlarged sectional view of the sealing device of FIG. Also in this modification, it is possible to achieve the same effect as the first embodiment.
- the O-ring 30, that is, a ring having a circular cross section perpendicular to the ring is used as the elastic ring.
- the elastic ring does not necessarily have a circular cross-sectional shape, and other various elastic ring shapes may be used.
- an X-ring having an X-shaped cross-section, a D-ring having a D-shaped cross-section, and a ring having a triangular cross-section can be used.
- FIG. 5 shows a modification in which a D-ring 55 is used instead of the O-ring 30 in the first embodiment.
- a sealing device has a valve box, a valve body that has a curved outer surface, is rotatably arranged in the valve box, and controls the flow of fluid, Used in a valve device comprising a pipe that is connected to a valve box or part of the valve box, and seals between the inner hole of the pipe and the space outside the valve body and inside the valve box A sealing ring that is formed of resin and is brought into contact with the outer surface of the valve body; and an elastic body ring that is formed of an elastic body and presses a part of the resin ring toward the valve body.
- the resin ring communicates with the inner hole, and is arranged between a center hole through which a fluid can flow, a step formed at an end of the tube, and the valve body.
- the second plate portion is pressed toward the valve body, and the first plate portion is pressed toward the stepped portion at the end of the tube.
- FIG. 6 is a cross-sectional view of the sealing device 1 according to the second embodiment of the present invention.
- the sealing device 1 includes a valve box 3, a pipe 4 connected to the valve box 3 or a part of the valve box 3 through which a fluid flows, and a valve disposed in the valve box 3 to control the flow of the fluid.
- the present invention is applied to a valve device including a body 6.
- the valve box 3, the pipe 4 and the valve body 6 are made of a hard material such as metal or PPS (polyphenylene sulfide) resin.
- the valve device to which the sealing device 1 is applied may be, for example, a valve device that supplies cooling water (refrigerant) of an internal combustion engine to a radiator, or a valve device that distributes oil of hydraulic equipment to a desired flow path. There may be other valve devices.
- the fluid controlled by the valve device may be a refrigerant or oil such as cooling water, but may be another fluid.
- the valve body 6 is rotatable in the valve box 3, and the flow rate of the fluid passing through the pipe 4 is adjusted with the rotation.
- the valve body 6 has a spherical or cylindrical outer surface shape.
- the valve body 6 is rotatable along the arc direction as shown by the arrows in the figure.
- a flow path space 7 through which a fluid (for example, oil, water, refrigerant) flows is provided, and the flow path space 7 opens at an opening 8 that penetrates the wall of the valve body 6.
- a fluid for example, oil, water, refrigerant
- the fluid can flow from the flow path space 7 to the inner hole 5.
- the opening 8 is separated from the inner hole 5 as the valve body 6 rotates, the flow path between the flow path space 7 and the inner hole 5 is blocked. Further, the flow rate of the fluid is adjusted according to the degree of overlap between the opening 8 and the inner hole 5.
- the illustrated pipe 4 is provided downstream of the valve box 3, and the fluid passing through the valve box 3 passes through the pipe 4.
- the pipe 4 is provided upstream of the valve box 3, and the fluid passing through the pipe 4 is supplied to the valve box. 3 may be passed.
- the sealing device 1 is used to seal between the inner hole 5 of the tube 4 and the space 35 outside the valve body 6 and inside the valve box 3 to prevent fluid flow therebetween.
- the sealing device 1 includes a resin ring 10 and a pressing mechanism (O-ring 31 in this embodiment) that presses a part of the resin ring 10 toward the valve body 6.
- the resin ring 10 is formed in an annular shape with resin.
- the resin ring 10 is formed of a hard material having a small friction coefficient.
- An example of a suitable material for the resin ring 10 is polytetrafluoroethylene (PTFE), but other resins may be used.
- the resin ring 10 includes a first plate portion 12, a second plate portion 14, and a connecting portion 16 that connects a part of the first plate portion 12 and a part of the second plate portion 14.
- the first plate portion 12 is a flat disc
- the second plate portion 14 is a curved disc
- the connecting portion 16 is a cylinder.
- the 1st board part 12, the 2nd board part 14, and the connection part 16 are arrange
- the resin ring 10 is formed with a central hole 18 extending along its central axis.
- the central hole 18 is arranged substantially coaxially in the inner hole 5 of the tube 4. Therefore, as described above, when the opening 8 of the valve body 6 overlaps with the center hole 18 of the resin ring 10 as the valve body 6 rotates, the inside of the tube 4 from the flow path space 7 through the center hole 18. The fluid can flow to the hole 5.
- a cutout that is, a circumferential groove 20 having a uniform depth (depth measured along the radial direction) is formed on the outer peripheral surface of the resin ring 10.
- the first plate portion 12 is disposed between the step portion 22 formed at the end portion of the tube 4 and the valve body 6.
- the second plate portion 14 faces the outer surface of the valve body 6 and is brought into close contact with the outer surface.
- the second plate portion 14 has a curved surface that conforms to the curved outer surface of the valve body 6, but the entire surface need not be in full contact with the valve body 6.
- the pressing mechanism is an O-ring (elastic ring) 31 that is fitted into the circumferential groove 20 between the first plate portion 12 and the second plate portion 14 of the resin ring 10.
- the O-ring 31 is a ring formed of an elastic body having a higher elasticity than the material of the resin ring 10, for example, an elastomer.
- the O-ring 31 presses the second plate portion 14 toward the valve body 6 by an elastic restoring force.
- the O-ring 31 presses the first plate portion 12 toward the stepped portion 22 at the end of the tube 4 by an elastic restoring force.
- fluid can also exist in the space 35 outside the valve body 6 and inside the valve box 3.
- the resin ring 10 and the O-ring 31 cooperate to prevent the flow of fluid from the space 35 to the inner hole 5 of the tube 4 and vice versa. More specifically, even if there is a gap between the radially outer edge of the first plate portion 12 of the resin ring 10 and the wall portion of the tube 4 on the outer side, the pressing force of the O-ring 31 In response to this, the first plate portion 12 is brought into close contact with the stepped portion 22 at the end of the tube 4 to shield the space 35 from the inner hole 5 of the tube 4. In this way, the O-ring 31 supplements the sealing performance of the resin ring 10.
- FIG. 7 is a partially enlarged sectional view of the sealing device of FIG.
- the resin ring 10 in which a part of the first plate part 12 and a part of the second plate part 14 are connected by the connecting part 16 since the resin ring 10 in which a part of the first plate part 12 and a part of the second plate part 14 are connected by the connecting part 16 is used, it has a conventional substantially rectangular cross section. Compared to the resin ring 101 (see FIG. 16), it is possible to reduce the thickness of the portion that is brought into close contact with the outer surface of the valve body 6 and increase its flexibility. As described above, since the portion that is brought into close contact with the outer surface of the valve body 6 (that is, the second plate portion 14) is highly flexible, even if the resin ring 10 formed of a hard material is used, the valve body 6 The adhesion of the second plate portion 14 to the outer surface is high.
- any portion of the second plate portion 14 is in close contact with the valve body 6. . Furthermore, since the flexibility of the second plate portion 14 is high, the second plate portion 14 can follow the outer surface of the valve body 6 even when the valve body 6 rotates. Then, the O-ring 31 presses the second plate portion 14 against the outer surface of the valve body 6 by an elastic restoring force. Therefore, high sealing performance can be exhibited without manufacturing a curved surface that is brought into close contact with the outer surface of the valve body 6 of the resin ring 10 with strict dimensional tolerances.
- the resin ring 10 has a hollow structure having a circumferential groove 20. Therefore, as shown by the arrow in FIG. 7, when the pressure P is applied to the second plate portion 14 from the fluid in the space 35 outside the valve body 6 and inside the valve box 3, the second plate portion 14 is By contracting in the radial direction, the curved surface of the second plate portion 14 is more closely attached to the outer surface of the valve body 6.
- the connecting portion 16 of the resin ring 10 connects the edge of the first plate portion 12 on the side of the center hole 18 and the edge of the second plate portion 14 on the side of the center hole 18. . Therefore, the O-ring 31 is disposed on the radially outer side with respect to the connecting portion 16, and the O-ring 31 can strongly press the second plate portion 14 against the curved outer surface of the valve body 6. In particular, when pressure P is applied to the O-ring 31 from a fluid in the space 35 outside the valve body 6 and inside the valve box 3, the O-ring 31 contracts in the radial direction and the second plate portion 14 is curved. The surface is more closely attached to the outer surface of the valve body 6.
- FIG. 8 shows a sealing device 60 according to a first modification of the second embodiment of the present invention.
- the same reference numerals are used to indicate constituent elements common to the second embodiment, and the constituent elements will not be described in detail.
- the sealing device 60 includes a resin ring 51 having a shape different from that of the second embodiment.
- the resin ring 51 includes a first plate portion 52 that is a flat disc, a second plate portion 54 that is a curved disc, and a portion of the first plate portion 52.
- It has the connection part 56 which is a cylinder which connects a part of 2nd board part 54.
- the 1st board part 52, the 2nd board part 54, and the connection part 56 are arrange
- the resin ring 51 is formed with a center hole 58 extending along the center axis.
- the center hole 58 is arranged substantially coaxially in the inner hole 5 of the tube 4. Accordingly, when the opening 8 of the valve body 6 overlaps the center hole 58 of the resin ring 51 as the valve body 6 rotates, fluid flows from the flow path space 7 to the inner hole 5 of the tube 4 via the center hole 58. Can flow.
- a notch that is, a circumferential groove 70 having a uniform depth (depth measured along the radial direction) is formed on the inner peripheral surface of the resin ring 51.
- the first plate portion 52 is disposed between the step portion 22 formed at the end portion of the tube 4 and the valve body 6.
- the second plate portion 54 faces the outer surface of the valve body 6 and is brought into close contact with the outer surface.
- the second plate portion 54 has a curved surface that conforms to the curved outer surface of the valve body 6, but the entire surface need not be in full contact with the valve body 6.
- a part of the resin ring 51 is pressed toward the valve body 6 by the pressing mechanism.
- the pressing mechanism is an O-ring (elastic ring) 31 that is fitted in the circumferential groove 70 between the first plate portion 52 and the second plate portion 54 of the resin ring 51.
- the O-ring 31 is a ring formed of an elastic body having a higher elasticity than the material of the resin ring 51, for example, an elastomer.
- the O-ring 31 presses the second plate portion 54 toward the valve body 6 by an elastic restoring force.
- the O-ring 31 presses the first plate portion 52 toward the stepped portion 22 at the end of the tube 4 by an elastic restoring force.
- FIG. 9 is a partially enlarged cross-sectional view of the sealing device of FIG.
- a resin ring 60 in which a part of the first plate part 52 and a part of the second plate part 54 are connected by the connecting part 56 is used, it has a conventional substantially rectangular cross section.
- the resin ring 101 see FIG. 16
- the portion that is, the second plate portion 54
- the portion that is, the second plate portion 54
- any portion of the second plate portion 54 is in close contact with the valve body 6. . Furthermore, since the flexibility of the second plate portion 54 is high, the second plate portion 54 can follow the outer surface of the valve body 6 even when the valve body 6 rotates. Then, the O-ring 31 presses the second plate portion 54 against the outer surface of the valve body 6 by an elastic restoring force. Therefore, high sealing performance can be exhibited without manufacturing a curved surface that is brought into close contact with the outer surface of the valve body 6 of the resin ring 60 with strict dimensional tolerances.
- the resin ring 60 has a hollow structure having a circumferential groove 70. Therefore, as shown by the arrow in FIG. 7, when pressure P is applied to the connecting portion 56 from the fluid in the space 35 outside the valve body 6 and inside the valve box 3, the second plate portion 54 is moved radially. By contracting, the curved surface of the second plate portion 54 is more closely attached to the outer surface of the valve body 6.
- the O-ring 31 may be pressed so as to spread the connecting portion 56 radially outward by an elastic restoring force.
- the connecting portion 56 is in close contact with the wall portion on the outside thereof.
- FIG. 10 shows a sealing device 61 according to a second modification of the second embodiment of the present invention.
- the sealing device 61 includes a second pressing mechanism (O-ring 62 in this embodiment) that presses the entire resin ring 10 toward the valve body 6.
- the O-ring 62 is a ring formed from an elastic body, such as an elastomer, having higher elasticity than the material of the resin ring 10.
- the O-ring 62 is installed at the stepped portion 22 at the end of the tube 4.
- the O-ring 62 is in contact with the first plate portion 12 of the resin ring 10 and presses the entire resin ring 10 toward the valve body 6 by an elastic restoring force.
- a circular groove 64 for receiving the O-ring 62 is formed in the step portion 22.
- the circular groove 64 is provided concentrically with the inner hole 5.
- the circular groove 64 is not necessarily provided.
- the resin ring 10 and the O-ring 62 cooperate to block the flow of fluid from the space 35 outside the valve body 6 and inside the valve box 3 to the inner hole 5 of the tube 4 and vice versa. More specifically, even if there is a gap between the radially outer edge of the first plate portion 12 of the resin ring 10 and the wall portion of the tube 4 on the outer side, the first plate portion 12 will be described.
- An O-ring 62 interposed between the tube 35 and the end of the tube 4 shields the space 35 from the inner hole 5 of the tube 4. In this way, the O-ring 62 supplements the sealing performance of the resin ring 10.
- a circular groove 64 is formed in the stepped portion 22 at the end of the tube 4, and an O-ring 62 is fitted in the circular groove 64. Therefore, the O-ring 62 is fixed at a fixed position and is compressed from the outside and the inside in the radial direction. For this reason, the O-ring 62 can apply a force toward the resin ring 10 in the circumferential direction to the resin ring 10 and press the resin ring 10 against the outer surface of the valve body 6 appropriately.
- the second modification is a modification of the second embodiment
- an O-ring 62 and a circular groove 64 may be added to the configuration of the first modification of the second embodiment.
- an O-ring 31 that is, a ring having a circular cross section perpendicular to the ring is used as the elastic ring.
- the elastic ring does not necessarily have a circular cross-sectional shape, and other various elastic ring shapes may be used.
- an X-ring having an X-shaped cross-section, a D-ring having a D-shaped cross-section, and a ring having a triangular cross-section can be used.
- FIG. 11 shows a modification in which a D ring 65 is used instead of the O ring 31 in the second embodiment.
- other various cross-sectional elastic rings may be used in place of the O-ring 62 of the second modification.
- a sealing device is connected to a valve box, a valve body having a curved outer surface and rotatably arranged in the valve box to control the flow of fluid, and the valve box.
- a sealing device that is used in a valve device including a pipe that is a part of the valve box and seals between an inner hole of the pipe and a space outside the valve body and inside the valve box.
- a center hole that is formed of resin and communicates with the inner hole of the tube and allows fluid to flow, and a curved facing surface that faces the outer surface of the valve body, and a circumferential groove on the facing surface.
- FIG. 12 is a cross-sectional view of the sealing device 1 according to the related invention of the present invention.
- the sealing device 1 includes a valve box 3, a pipe 4 connected to the valve box 3 or a part of the valve box 3 through which a fluid flows, and a valve disposed in the valve box 3 to control the flow of the fluid.
- the present invention is applied to a valve device including a body 6.
- the valve box 3, the pipe 4 and the valve body 6 are made of a hard material such as metal or PPS (polyphenylene sulfide) resin.
- the valve device to which the sealing device 1 is applied may be, for example, a valve device that supplies cooling water (refrigerant) of an internal combustion engine to a radiator, or a valve device that distributes oil of hydraulic equipment to a desired flow path. There may be other valve devices.
- the fluid controlled by the valve device may be a refrigerant or oil such as cooling water, but may be another fluid.
- valve body 6 is rotatable in the valve box 3, and the flow rate of the fluid passing through the pipe 4 is adjusted with the rotation. Although only a part of the valve box 3 and the valve body 6 is shown in FIG. 12, the valve body 6 has a spherical or cylindrical outer surface shape. The valve body 6 is rotatable along the arc direction as shown by the arrows in the figure.
- a flow path space 7 through which a fluid (for example, oil, water, refrigerant) flows is provided, and the flow path space 7 opens at an opening 8 that penetrates the wall of the valve body 6.
- a fluid for example, oil, water, refrigerant
- the fluid can flow from the flow path space 7 to the inner hole 5.
- the opening 8 is separated from the inner hole 5 as the valve body 6 rotates, the flow path between the flow path space 7 and the inner hole 5 is blocked. Further, the flow rate of the fluid is adjusted according to the degree of overlap between the opening 8 and the inner hole 5.
- the illustrated pipe 4 is provided downstream of the valve box 3, and the fluid passing through the valve box 3 passes through the pipe 4.
- the pipe 4 is provided upstream of the valve box 3, and the fluid passing through the pipe 4 is supplied to the valve box. 3 may be passed.
- the sealing device 1 is used to seal between the inner hole 5 of the tube 4 and the space 35 outside the valve body 6 and inside the valve box 3 to prevent fluid flow therebetween.
- the sealing device 1 includes a resin ring 10 and a first elastic ring (O-ring 90 in this embodiment) that is supported by the resin ring 10 and pressed toward the valve body 6.
- the resin ring 10 is formed in an annular shape with resin.
- the resin ring 10 is formed of a hard material having a small friction coefficient.
- An example of a suitable material for the resin ring 10 is polytetrafluoroethylene (PTFE), but other resins may be used.
- the resin ring 10 includes an inner peripheral surface 82, an outer peripheral surface 84, a flat surface 86 perpendicular to the central axis of the resin ring 10, and a facing surface 88 that is opposite to the flat surface 86 and faces the outer surface of the valve body 6. And have.
- the resin ring 10 is formed with a central hole defined by the inner peripheral surface 82 and extending along the central axis of the resin ring 10.
- the central hole is arranged substantially coaxially with the inner hole 5 of the tube 4. Therefore, as described above, when the opening 8 of the valve body 6 overlaps with the center hole of the resin ring 10 as the valve body 6 rotates, the inner hole 5 of the pipe 4 from the flow path space 7 passes through the center hole. The fluid can flow to.
- the resin ring 10 is disposed between the step portion 22 formed at the end of the tube 4 and the valve body 6.
- the O-ring 90 described above is supported on the facing surface 88 of the resin ring 10. Specifically, a circumferential groove concentric with the inner circumferential surface 82 and the outer circumferential surface 84 is formed in the facing surface 88, and an O-ring 90 is fitted into the circumferential groove, and the O-ring 90 is curved of the valve body 6. To the outside surface.
- the O-ring 90 is a ring formed of an elastic body having higher elasticity than the material of the resin ring 10, for example, an elastomer.
- the O-ring 90 is brought into close contact with the curved outer surface of the valve body 6 by its elastic restoring force.
- the O-ring 90 may be fixed in the circumferential groove with an adhesive. Alternatively, the O-ring 90 may be fixed in the circumferential groove by plasma treatment and pressing.
- the sealing device 1 further includes a second elastic ring (O-ring 91 in this embodiment) that presses the entire resin ring 10 toward the valve body 6.
- a second elastic ring (O-ring 91 in this embodiment) that presses the entire resin ring 10 toward the valve body 6.
- the O-ring 91 is not necessarily provided.
- the O-ring 91 is a ring formed from an elastic body having a higher elasticity than the material of the resin ring 10, for example, an elastomer.
- the O-ring 91 is in contact with the flat surface 86 of the resin ring 10 and presses the entire resin ring 10 toward the valve body 6 by an elastic restoring force.
- a circular groove 32 for receiving the O-ring 91 is formed in the step portion 22 formed at the end of the tube 4.
- the circular groove 32 is provided concentrically with the inner hole 5.
- the circular groove 32 is not necessarily provided.
- fluid can also exist in the space 35 outside the valve body 6 and inside the valve box 3.
- the resin ring 10 and the O-ring 91 cooperate to prevent the flow of fluid from the space 35 to the inner hole 5 of the tube 4 and vice versa. More specifically, even if there is a gap between the outer peripheral surface 84 of the resin ring 10 and the wall portion of the tube 4 on the outer side, the O interposed between the resin ring 10 and the end portion of the tube 4. A ring 91 shields between the space 35 and the inner hole 5 of the tube 4. In this way, the O-ring 91 supplements the sealing performance of the resin ring 10.
- FIG. 13 is a partially enlarged sectional view of the sealing device of FIG.
- an O-ring 90 is fitted into a circumferential groove formed in a facing surface 88 of the resin ring 10 facing the curved outer surface of the valve body 6, and the O-ring 90 is brought into close contact with the outer surface of the valve body 6. It is done.
- the O-ring 90 has higher elasticity than the resin ring 10 and has high adhesion to the curved outer surface of the valve body 6. Therefore, high sealing performance can be exhibited without manufacturing the curved facing surface 88 of the resin ring 10 with strict dimensional tolerances. Since the O-ring 90 is soft, it is easy to be worn away by contact with the valve body 6.
- the curved facing surface 88 of the resin ring 10 is in close contact with the outer surface of the valve body 6. It is possible to ensure at least a certain degree of sealing performance over a long period with respect to the outer surface of 6.
- the sealing device 1 further includes a second O-ring 91 that is installed in the stepped portion 22 formed at the end of the tube 4 and presses the entire resin ring 10 toward the valve body 6. Accordingly, since the entire resin ring 10 is pressed toward the valve body 6, it is possible to strongly press the first O-ring 90 against the curved outer surface of the valve body 6. Even after the O-ring 90 is worn out, the entire resin ring 10 is pressed toward the valve body 6, so that the curved facing surface 88 of the resin ring 10 comes into close contact with the outer surface of the valve body 6. At least a certain degree of sealing performance can be secured over a long period of time on the outer surface of the body 6.
- the circular groove 32 is formed in the stepped portion 22 at the end of the tube 4, and the O-ring 91 is fitted in the circular groove 32. Therefore, the O-ring 91 is fixed at a fixed position, and is compressed from the outside and the inside in the radial direction. For this reason, the O-ring 91 can apply a force directed to the resin ring 10 in a circumferential direction to the resin ring 10 and appropriately press the resin ring 10 against the outer surface of the valve body 6.
- the single O-ring 90 is arranged in the circumferential groove of the facing surface 88 of the resin ring 10.
- the plurality of O-rings 90 may be disposed in the plurality of circumferential grooves on the facing surface 88 of the resin ring 10, respectively.
- an O-ring that is, a ring having a circular cross section perpendicular to the ring is used as the elastic ring.
- the elastic ring does not necessarily have a circular cross-sectional shape, and other various elastic ring shapes may be used.
- an X-ring having an X-shaped cross-section, a D-ring having a D-shaped cross-section, and a ring having a triangular cross-section can be used.
- FIG. 15 shows a modification in which a D ring 92 is used instead of the O ring 90 and a D ring 93 is used instead of the O ring 91.
- Valve box 4 Tube 5 Inner hole 6 Valve body 7 Flow path space 8 Opening portion 10, 41, 51, 61 Resin ring 12, 42, 52 First plate portion 14, 44, 54 First Two plate portions 16, 46, 56 Connecting portions 18, 48, 58 Center holes 20, 50, 70 Circumferential groove 22 Stepped portions 30, 31 O-ring (elastic body ring) 32, 64 Circular groove 35 Space 55, 65 D ring (elastic ring) 62 O-ring 82 Inner peripheral surface 84 Outer peripheral surface 86 Flat surface 88 Opposing surface 90 O-ring (first elastic ring) 91 O-ring (second elastic ring) 92 D-ring (first elastic ring) 93 D-ring (second elastic ring)
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Abstract
Provided is a sealing device that can exhibit exceptional sealing properties even if a resin ring formed from a hard material is used. A valve device comprising a valve box (3), a valve body (6) that is rotatably disposed inside the valve box and that controls the flow of a fluid, and a tube (4) that is either connected to the valve box or is part of the valve box, wherein a sealing device (1) is used to seal the area between an inner hole (5) of the tube and a space (35) on the outer side of the valve body and the inner side of the valve box. The sealing device is provided with a resin ring (10) brought into contact with a curved outer surface of the valve body, and an elastic body ring (30) that is installed on a step part (22) formed in the end of the tube and that presses the valve body via part or all of the resin ring. The resin ring, which passes through the inner hole, is provided with a center hole (18) through which the fluid can flow, a first plate portion (12) disposed between the valve body and the step part formed in the end of the tube, a second plate portion (14) firmly affixed to the outer surface of the valve body, and a connecting portion (16) that connects a part of each of the other portions together.
Description
本発明は、管の内孔と弁箱の内側の空間を遮蔽して、これらの間の流体の流れを防止する密封装置に関する。
The present invention relates to a sealing device that shields an inner hole of a pipe and a space inside a valve box and prevents a fluid flow between them.
従来、流量制御弁装置に使用するのに好適な密封機構として、例えば特許文献1の図6に記載されたものがある。図16に示すように、この密封機構は、内周孔111が形成されたハウジング110の内周に配置された樹脂リング101と、内周孔111の開口端部近傍に配置されたOリング102とを備える。Oリング102は、樹脂リング101と、内周孔111の開口端部近傍の段差面112との間に配置されており、弾性力によって樹脂リング101を球状または円筒状の弁体120に向けて押圧する。
Conventionally, as a suitable sealing mechanism for use in a flow control valve device, for example, there is one described in FIG. As shown in FIG. 16, this sealing mechanism includes a resin ring 101 disposed on the inner periphery of the housing 110 in which the inner peripheral hole 111 is formed, and an O-ring 102 disposed in the vicinity of the opening end portion of the inner peripheral hole 111. With. The O-ring 102 is disposed between the resin ring 101 and the step surface 112 in the vicinity of the opening end of the inner peripheral hole 111, and the resin ring 101 is directed toward the spherical or cylindrical valve body 120 by elastic force. Press.
弁体120の内部には、流体(例えば、オイル、水、冷媒)が流れる流路空間が設けられ、流路空間は開口部121で開口する。弁体120は回転可能であって、開口部121が樹脂リング101の内側の空間101aおよびハウジング110の内周孔111に通ずると、流路空間から内周孔111へ、または内周孔111から流路空間へ流体が流れることが可能となる。また、弁体120の回転に伴って、開口部121が内周孔111から離れると、流路が閉塞させられる。少なくとも開口部121が内周孔111に重ねられる時には、樹脂リング101は、弁体120の外面に接触し、流体が樹脂リング101と弁体120の間を漏れないようにする必要がある。
Inside the valve body 120, a flow path space through which fluid (for example, oil, water, refrigerant) flows is provided, and the flow path space opens at the opening 121. The valve body 120 is rotatable, and when the opening 121 communicates with the space 101 a inside the resin ring 101 and the inner peripheral hole 111 of the housing 110, the flow path space leads to the inner peripheral hole 111 or from the inner peripheral hole 111. The fluid can flow into the channel space. Further, when the opening 121 moves away from the inner peripheral hole 111 with the rotation of the valve body 120, the flow path is closed. At least when the opening 121 is overlapped with the inner peripheral hole 111, the resin ring 101 needs to come into contact with the outer surface of the valve body 120, so that fluid does not leak between the resin ring 101 and the valve body 120.
図17は、樹脂リング101と弁体120の配置の例を示す斜視図である。この図の弁装置はマルチコントロールバルブであり、弁体120は円筒状であって、複数の開口部121にそれぞれ対応する複数の樹脂リング101が設けられている。樹脂リング101は固定されており、弁体120は矢印に示すように回転可能である。弁体120の回転に伴って、樹脂リング101の内側の空間が、弁体120の流路空間122の開口部121に重なる時、流体が樹脂リング101の内側の空間101aを流れる。
FIG. 17 is a perspective view showing an example of the arrangement of the resin ring 101 and the valve body 120. The valve device in this figure is a multi-control valve. The valve body 120 is cylindrical, and a plurality of resin rings 101 corresponding to the plurality of openings 121 are provided. The resin ring 101 is fixed, and the valve body 120 is rotatable as indicated by an arrow. As the valve body 120 rotates, when the space inside the resin ring 101 overlaps the opening 121 of the flow path space 122 of the valve body 120, the fluid flows through the space 101 a inside the resin ring 101.
上記の密封機構においては、樹脂リング101と弁体120の湾曲した外面との間を封止するため、樹脂リング101の弁体120側の面101bは、図18に示すように、弁体120の球状または円柱状の外面形状に適合する湾曲を有する。弁体120は硬質の材料、例えば金属またはPPS(ポリフェニレンサルファイド)樹脂から形成されており、また樹脂リング101は、摩擦係数が小さい硬質の材料、例えばポリテトラフルオロエチレン(PTFE)から形成されている。
In the sealing mechanism described above, the surface 101b on the valve body 120 side of the resin ring 101 is sealed between the resin ring 101 and the curved outer surface of the valve body 120, as shown in FIG. Have a curvature that conforms to the spherical or cylindrical outer shape. The valve body 120 is made of a hard material such as metal or PPS (polyphenylene sulfide) resin, and the resin ring 101 is made of a hard material having a low friction coefficient, such as polytetrafluoroethylene (PTFE). .
このような密封機構において、硬質の材料から形成された樹脂リング101を使用しても、湾曲した弁体120の外面に対して高い封止性を発揮することが望ましい。
In such a sealing mechanism, it is desirable to exhibit high sealing performance against the outer surface of the curved valve body 120 even when the resin ring 101 formed of a hard material is used.
そこで、本発明は、硬質の材料から形成された樹脂リングを使用しても高い封止性を発揮することができる密封装置を提供することを目的とする。
Therefore, an object of the present invention is to provide a sealing device that can exhibit high sealing performance even when a resin ring formed of a hard material is used.
上記課題を解決するため、本発明に係る密封装置は、弁箱と、湾曲した外面を有し、前記弁箱内に回転可能に配置されて流体の流れを制御する弁体と、前記弁箱に連結されているか前記弁箱の一部である管とを備える弁装置に使用され、前記管の内孔と、前記弁体の外側かつ前記弁箱の内側の空間との間を密封する密封装置であって、樹脂によって形成され、前記弁体の外面に接触させられ、周溝が形成されている樹脂リングと、弾性体から形成された、前記樹脂リングの一部又は全体を介して前記弁体を押圧する弾性体リングとを備え、前記樹脂リングは、前記内孔に通じており、流体が流動可能な中心孔と、前記管の端部に形成された前記段差部と前記弁体との間に配置される第1の板部分と、前記弁体の前記外面に密着させられる第2の板部分と、前記第1の板部分の一部と前記第2の板部分の一部とを連結する連結部分とを備え、前記弾性体リングは、前記樹脂リングの前記第1の板部分と前記第2の板部分との間の周溝内又は前記管の端部に形成された段差部に嵌め込まれている。
In order to solve the above-described problems, a sealing device according to the present invention includes a valve box, a valve body having a curved outer surface and rotatably disposed in the valve box to control a fluid flow, and the valve box Used for a valve device comprising a pipe connected to or part of the valve box, and sealing between the inner hole of the pipe and the space outside the valve body and inside the valve box A device, which is formed of a resin, is brought into contact with the outer surface of the valve body, and has a resin groove in which a circumferential groove is formed, and a part or the whole of the resin ring formed from an elastic body. An elastic ring that presses the valve body, and the resin ring communicates with the inner hole and allows a fluid to flow therethrough, the stepped portion formed at the end of the pipe, and the valve body A first plate portion disposed between the first plate portion and the outer surface of the valve body. And a connecting portion that connects a part of the first plate part and a part of the second plate part, wherein the elastic ring is the first plate part of the resin ring. And a step formed in a circumferential groove between the first plate portion and the second plate portion.
本発明に係る密封装置によれば、第1の板部分の一部と第2の板部分の一部が連結部分によって連結されている樹脂リングが使用されるため、従来のほぼ矩形断面を有する樹脂リングに比べて、弁体の外面に密着させられる部分の厚さを小さくし、その可撓性を高めることが可能である。このように弁体の外面に密着させられる部分(すなわち第2の板部分)の可撓性が高いため、硬質の材料から形成された樹脂リングを使用しても、弁体の外面に対する第2の板部分の密着性が高い。そして、弾性体リングが弾性復元力によって第2の板部分を弁体の外面に押圧する。
According to the sealing device of the present invention, since the resin ring in which a part of the first plate part and a part of the second plate part are connected by the connecting part is used, it has a conventional substantially rectangular cross section. Compared with the resin ring, it is possible to reduce the thickness of the portion that is brought into close contact with the outer surface of the valve body and to increase its flexibility. As described above, since the portion that is brought into close contact with the outer surface of the valve body (that is, the second plate portion) is highly flexible, even if a resin ring formed of a hard material is used, the second portion with respect to the outer surface of the valve body is used. The adhesion of the plate part is high. And an elastic body ring presses a 2nd board part to the outer surface of a valve body with an elastic restoring force.
本発明の一態様における密封装置においては、弾性体リングは、管の端部に形成された段差部に設置されており、樹脂リングの全体を弁体に向けて押圧する。
また、弾性体リングは、管の段差部に形成された円形溝に嵌め込まれるようになっていてもよい。 In the sealing device according to one aspect of the present invention, the elastic ring is installed in a stepped portion formed at the end of the tube, and presses the entire resin ring toward the valve body.
The elastic ring may be fitted in a circular groove formed in the step portion of the pipe.
また、弾性体リングは、管の段差部に形成された円形溝に嵌め込まれるようになっていてもよい。 In the sealing device according to one aspect of the present invention, the elastic ring is installed in a stepped portion formed at the end of the tube, and presses the entire resin ring toward the valve body.
The elastic ring may be fitted in a circular groove formed in the step portion of the pipe.
本発明の別の態様における密封装置においては、弾性体リングは、樹脂リングの第1の板部分と第2の板部分との間の周溝内に嵌め込まれており、第2の板部分を弁体に向けて押圧し、第1の板部分を管の端部の段差部に向けて押圧する。
また、樹脂リングの連結部分は、第1の板部分の中心孔側の端縁と、第2の板部分の中心孔側の端縁とを連結するものであってもよい。 In the sealing device according to another aspect of the present invention, the elastic body ring is fitted in a circumferential groove between the first plate portion and the second plate portion of the resin ring, and the second plate portion is It presses toward a valve body and presses a 1st board part toward the level | step-difference part of the edge part of a pipe | tube.
Moreover, the connection part of the resin ring may connect the edge on the center hole side of the first plate part and the edge on the center hole side of the second plate part.
また、樹脂リングの連結部分は、第1の板部分の中心孔側の端縁と、第2の板部分の中心孔側の端縁とを連結するものであってもよい。 In the sealing device according to another aspect of the present invention, the elastic body ring is fitted in a circumferential groove between the first plate portion and the second plate portion of the resin ring, and the second plate portion is It presses toward a valve body and presses a 1st board part toward the level | step-difference part of the edge part of a pipe | tube.
Moreover, the connection part of the resin ring may connect the edge on the center hole side of the first plate part and the edge on the center hole side of the second plate part.
本発明においては、弁体の外面に密着させられる部分(すなわち第2の板部分)の可撓性が高いため、硬質の材料から形成された樹脂リングを使用しても、弁体の外面に対する第2の板部分の密着性が高い。そして、弾性体リングが弾性復元力によって樹脂リングの全体又は一部を弁体の外面に押圧する。したがって、樹脂リングの弁体の外面に密着させられる湾曲面を厳密な寸法公差で製造しなくても高い封止性を発揮することができる。
In the present invention, since the portion that is brought into close contact with the outer surface of the valve body (that is, the second plate portion) is highly flexible, even if a resin ring formed of a hard material is used, The adhesion of the second plate portion is high. And an elastic body ring presses the whole or a part of resin ring to the outer surface of a valve body with an elastic restoring force. Therefore, high sealing performance can be exhibited without manufacturing a curved surface that is brought into close contact with the outer surface of the valve body of the resin ring with strict dimensional tolerances.
以下、添付の図面を参照しながら本発明に係る実施形態を説明する。
Embodiments according to the present invention will be described below with reference to the accompanying drawings.
第1実施形態
本発明の第1実施形態に係る密封装置は、弁箱と、湾曲した外面を有し、前記弁箱内に回転可能に配置されて流体の流れを制御する弁体と、前記弁箱に連結されているか前記弁箱の一部である管とを備える弁装置に使用され、前記管の内孔と、前記弁体の外側かつ前記弁箱の内側の空間との間を密封する密封装置であって、樹脂によって形成され、前記弁体の外面に接触させられる樹脂リングと、弾性体から形成され、前記管の端部に形成された段差部に設置されて前記樹脂リングの全体を前記弁体に向けて押圧する弾性体リングとを備え、前記樹脂リングは、前記内孔に通じており、流体が流動可能な中心孔と、前記管の端部に形成された前記段差部と前記弁体との間に配置される第1の板部分と、前記弁体の前記外面に密着させられる第2の板部分と、前記第1の板部分の一部と前記第2の板部分の一部とを連結する連結部分とを備えることを特徴とする。
図1は、本発明の第1実施形態に係る密封装置1の断面図である。この密封装置1は、弁箱3と、弁箱3に連結されているか弁箱3の一部であって流体が流れる管4と、弁箱3内に配置されて流体の流れを制御する弁体6を備える弁装置に適用される。弁箱3、管4および弁体6は、硬質の材料、例えば金属またはPPS(ポリフェニレンサルファイド)樹脂から形成されている。 1st Embodiment The sealing device which concerns on 1st Embodiment of this invention has a valve box, the valve body which has a curved outer surface, is arrange | positioned rotatably in the said valve box, and controls the flow of fluid, Used in a valve device comprising a pipe that is connected to a valve box or part of the valve box, and seals between the inner hole of the pipe and the space outside the valve body and inside the valve box A sealing device that is formed of a resin and is contacted with an outer surface of the valve body, and is formed of an elastic body and is installed in a step portion formed at an end portion of the pipe. An elastic ring that presses the whole toward the valve body, and the resin ring communicates with the inner hole and allows a fluid to flow, and the step formed at the end of the pipe A first plate portion arranged between the valve body and the valve body, and tightly contacting the outer surface of the valve body The second plate portion is provided, and a connecting portion for connecting a part of the first plate portion and a part of the second plate portion is provided.
FIG. 1 is a cross-sectional view of asealing device 1 according to a first embodiment of the present invention. The sealing device 1 includes a valve box 3, a pipe 4 connected to the valve box 3 or a part of the valve box 3 through which a fluid flows, and a valve disposed in the valve box 3 to control the flow of the fluid. The present invention is applied to a valve device including a body 6. The valve box 3, the pipe 4 and the valve body 6 are made of a hard material such as metal or PPS (polyphenylene sulfide) resin.
本発明の第1実施形態に係る密封装置は、弁箱と、湾曲した外面を有し、前記弁箱内に回転可能に配置されて流体の流れを制御する弁体と、前記弁箱に連結されているか前記弁箱の一部である管とを備える弁装置に使用され、前記管の内孔と、前記弁体の外側かつ前記弁箱の内側の空間との間を密封する密封装置であって、樹脂によって形成され、前記弁体の外面に接触させられる樹脂リングと、弾性体から形成され、前記管の端部に形成された段差部に設置されて前記樹脂リングの全体を前記弁体に向けて押圧する弾性体リングとを備え、前記樹脂リングは、前記内孔に通じており、流体が流動可能な中心孔と、前記管の端部に形成された前記段差部と前記弁体との間に配置される第1の板部分と、前記弁体の前記外面に密着させられる第2の板部分と、前記第1の板部分の一部と前記第2の板部分の一部とを連結する連結部分とを備えることを特徴とする。
図1は、本発明の第1実施形態に係る密封装置1の断面図である。この密封装置1は、弁箱3と、弁箱3に連結されているか弁箱3の一部であって流体が流れる管4と、弁箱3内に配置されて流体の流れを制御する弁体6を備える弁装置に適用される。弁箱3、管4および弁体6は、硬質の材料、例えば金属またはPPS(ポリフェニレンサルファイド)樹脂から形成されている。 1st Embodiment The sealing device which concerns on 1st Embodiment of this invention has a valve box, the valve body which has a curved outer surface, is arrange | positioned rotatably in the said valve box, and controls the flow of fluid, Used in a valve device comprising a pipe that is connected to a valve box or part of the valve box, and seals between the inner hole of the pipe and the space outside the valve body and inside the valve box A sealing device that is formed of a resin and is contacted with an outer surface of the valve body, and is formed of an elastic body and is installed in a step portion formed at an end portion of the pipe. An elastic ring that presses the whole toward the valve body, and the resin ring communicates with the inner hole and allows a fluid to flow, and the step formed at the end of the pipe A first plate portion arranged between the valve body and the valve body, and tightly contacting the outer surface of the valve body The second plate portion is provided, and a connecting portion for connecting a part of the first plate portion and a part of the second plate portion is provided.
FIG. 1 is a cross-sectional view of a
密封装置1が適用される弁装置は、例えば、内燃機関の冷却水(冷媒)をラジエータに供給する弁装置であってもよいし、油圧機器のオイルを所望の流路に分配する弁装置であってもよいが、他の弁装置であってもよい。弁装置が制御する流体は、冷却水のような冷媒またはオイルであってもよいが、他の流体であってもよい。
The valve device to which the sealing device 1 is applied may be, for example, a valve device that supplies cooling water (refrigerant) of an internal combustion engine to a radiator, or a valve device that distributes oil of hydraulic equipment to a desired flow path. There may be other valve devices. The fluid controlled by the valve device may be a refrigerant or oil such as cooling water, but may be another fluid.
弁体6は、弁箱3内で回転可能であって、その回転に伴って、管4を通過する流体の流量が調節される。図1においては、弁箱3と弁体6の一部のみを示すが、弁体6は球状または円柱状の外面形状を有する。弁体6は、図の矢印に示すように、円弧方向に沿って回転可能である。
The valve body 6 is rotatable in the valve box 3, and the flow rate of the fluid passing through the pipe 4 is adjusted with the rotation. In FIG. 1, only a part of the valve box 3 and the valve body 6 is shown, but the valve body 6 has a spherical or cylindrical outer surface shape. The valve body 6 is rotatable along the arc direction as shown by the arrows in the figure.
弁体6の内部には、流体(例えば、オイル、水、冷媒)が流れる流路空間7が設けられ、流路空間7は、弁体6の壁を貫通する開口部8で開口する。弁体6の回転に伴って、開口部8が管4の内孔5に通ずると、流路空間7から内孔5へ流体が流れることが可能となる。逆に、弁体6の回転に伴って、開口部8が内孔5から離れると、流路空間7と内孔5の間の流路が閉塞させられる。また、開口部8と内孔5の重なりの程度に応じて、流体の流量が調節される。図示の管4は弁箱3の下流に設けられ、弁箱3を通った流体が管4を通過するが、管4は弁箱3の上流に設けられ、管4を通った流体が弁箱3を通過してもよい。
Inside the valve body 6, a flow path space 7 through which a fluid (for example, oil, water, refrigerant) flows is provided, and the flow path space 7 opens at an opening 8 that penetrates the wall of the valve body 6. When the opening 8 passes through the inner hole 5 of the pipe 4 along with the rotation of the valve body 6, the fluid can flow from the flow path space 7 to the inner hole 5. Conversely, when the opening 8 is separated from the inner hole 5 as the valve body 6 rotates, the flow path between the flow path space 7 and the inner hole 5 is blocked. Further, the flow rate of the fluid is adjusted according to the degree of overlap between the opening 8 and the inner hole 5. The illustrated pipe 4 is provided downstream of the valve box 3, and the fluid passing through the valve box 3 passes through the pipe 4. The pipe 4 is provided upstream of the valve box 3, and the fluid passing through the pipe 4 is supplied to the valve box. 3 may be passed.
密封装置1は、管4の内孔5と、弁体6の外側かつ弁箱3の内側の空間35との間を密封して、これらの間の流体の流れを防止するために使用される。密封装置1は、樹脂リング10と、樹脂リング10の全体を弁体6に向けて押圧する押圧機構(この実施形態ではOリング30)を有する。
The sealing device 1 is used to seal between the inner hole 5 of the tube 4 and the space 35 outside the valve body 6 and inside the valve box 3 to prevent fluid flow therebetween. . The sealing device 1 includes a resin ring 10 and a pressing mechanism (O-ring 30 in this embodiment) that presses the entire resin ring 10 toward the valve body 6.
樹脂リング10は、樹脂によって環状に形成されている。好ましくは、樹脂リング10は摩擦係数が小さい硬質の材料から形成されている。樹脂リング10の好適な材料の例は、ポリテトラフルオロエチレン(PTFE)であるが、他の樹脂であってもよい。
The resin ring 10 is formed in an annular shape with resin. Preferably, the resin ring 10 is formed of a hard material having a small friction coefficient. An example of a suitable material for the resin ring 10 is polytetrafluoroethylene (PTFE), but other resins may be used.
樹脂リング10は、第1の板部分12と、第2の板部分14と、第1の板部分12の一部と第2の板部分14の一部とを連結する連結部分16とを有する。第1の板部分12は平坦な円板であり、第2の板部分14は湾曲した円板であり、連結部分16は円筒である。第1の板部分12、第2の板部分14および連結部分16は、同軸に配置され、一体成形されている。
The resin ring 10 includes a first plate portion 12, a second plate portion 14, and a connecting portion 16 that connects a part of the first plate portion 12 and a part of the second plate portion 14. . The first plate portion 12 is a flat disc, the second plate portion 14 is a curved disc, and the connecting portion 16 is a cylinder. The 1st board part 12, the 2nd board part 14, and the connection part 16 are arrange | positioned coaxially, and are integrally molded.
樹脂リング10には、その中心軸線に沿って延びる中心孔18が形成されている。中心孔18は管4の内孔5にほぼ同軸に配列される。したがって、上記の通り、弁体6の回転に伴って、弁体6の開口部8が樹脂リング10の中心孔18に重なると、中心孔18を介して、流路空間7から管4の内孔5へ流体が流れることが可能となる。
The resin ring 10 is formed with a central hole 18 extending along its central axis. The central hole 18 is arranged substantially coaxially in the inner hole 5 of the tube 4. Therefore, as described above, when the opening 8 of the valve body 6 overlaps with the center hole 18 of the resin ring 10 as the valve body 6 rotates, the inside of the tube 4 from the flow path space 7 through the center hole 18. The fluid can flow to the hole 5.
この実施形態では、第1の板部分12の中心孔18側の端縁と、第2の板部分14の中心孔18側の端縁が、連結部分16により連結されている。したがって、樹脂リング10の外周面には、一様な深さ(半径方向に沿って測った深さ)の切欠きすなわち周溝20が形成されている。
In this embodiment, the edge on the center hole 18 side of the first plate portion 12 and the edge on the center hole 18 side of the second plate portion 14 are connected by the connecting portion 16. Therefore, a cutout, that is, a circumferential groove 20 having a uniform depth (depth measured along the radial direction) is formed on the outer peripheral surface of the resin ring 10.
第1の板部分12は、管4の端部に形成された段差部22と弁体6との間に配置される。第2の板部分14は、弁体6の外面に対向し、その外面に密着させられる。第2の板部分14は、弁体6の湾曲した外面に適合する湾曲した面を有するが、その面全体が弁体6に完全に接触する必要はない。
The first plate portion 12 is disposed between the step portion 22 formed at the end portion of the tube 4 and the valve body 6. The second plate portion 14 faces the outer surface of the valve body 6 and is brought into close contact with the outer surface. The second plate portion 14 has a curved surface that conforms to the curved outer surface of the valve body 6, but the entire surface need not be in full contact with the valve body 6.
上述したように、樹脂リング10の全体は、押圧機構によって弁体6に向けて押圧される。この実施形態において、押圧機構は、管4の端部の段差部22に設置されたOリング(弾性体リング)30である。Oリング30は、樹脂リング10の材料よりも弾性が高い弾性体、例えばエラストマーから形成されたリングである。Oリング30は、樹脂リング10の第1の板部分12に接触しており、弾性復元力によって樹脂リング10の全体を弁体6に向けて押圧する。
As described above, the entire resin ring 10 is pressed toward the valve body 6 by the pressing mechanism. In this embodiment, the pressing mechanism is an O-ring (elastic body ring) 30 installed at the stepped portion 22 at the end of the tube 4. The O-ring 30 is a ring formed of an elastic body having a higher elasticity than the material of the resin ring 10, for example, an elastomer. The O-ring 30 is in contact with the first plate portion 12 of the resin ring 10 and presses the entire resin ring 10 toward the valve body 6 by an elastic restoring force.
この実施形態では、段差部22にOリング30を受け入れるための円形溝32が形成されている。円形溝32は内孔5と同心に設けられている。但し、円形溝32は必ずしも設けなくてもよい。
In this embodiment, a circular groove 32 for receiving the O-ring 30 is formed in the stepped portion 22. The circular groove 32 is provided concentrically with the inner hole 5. However, the circular groove 32 is not necessarily provided.
この実施形態に係る弁装置においては、弁体6の外側かつ弁箱3の内側の空間35にも流体が存在しうる。樹脂リング10とOリング30は、協働して、空間35から管4の内孔5への流体の流れ、およびその逆の流れを阻止する。より具体的には、樹脂リング10の第1の板部分12の半径方向外側の端縁と、その外側の管4の壁部との間に隙間があったとしても、第1の板部分12と管4の端部との間に介在するOリング30が空間35と管4の内孔5との間を遮蔽する。このようにして、Oリング30が樹脂リング10の封止性能を補完する。
In the valve device according to this embodiment, fluid can also exist in the space 35 outside the valve body 6 and inside the valve box 3. The resin ring 10 and the O-ring 30 cooperate to prevent the flow of fluid from the space 35 to the inner hole 5 of the tube 4 and vice versa. More specifically, even if there is a gap between the radially outer edge of the first plate portion 12 of the resin ring 10 and the wall portion of the tube 4 on the outer side, the first plate portion 12 will be described. An O-ring 30 interposed between the tube 4 and the end of the tube 4 shields the space 35 and the inner hole 5 of the tube 4. In this way, the O-ring 30 supplements the sealing performance of the resin ring 10.
図2は、図1の密封装置の一部拡大断面図である。この実施形態においては、第1の板部分12の一部と第2の板部分14の一部が連結部分16によって連結されている樹脂リング10が使用されるため、従来のほぼ矩形断面を有する樹脂リング101(図16参照)に比べて、弁体6の外面に密着させられる部分の厚さを小さくし、その可撓性を高めることが可能である。このように弁体6の外面に密着させられる部分(すなわち第2の板部分14)の可撓性が高いため、硬質の材料から形成された樹脂リング10を使用しても、弁体6の外面に対する第2の板部分14の密着性が高い。例えば、図2に示すように、第2の板部分14の全体が弁体6に完全に密着していなくても、第2の板部分14のいずれかの部分が弁体6に密着させられる。さらに、第2の板部分14の可撓性が高いため、弁体6が回転しても、第2の板部分14が弁体6の外面に追随することができる。したがって、樹脂リング10の弁体6の外面に密着させられる湾曲面を厳密な寸法公差で製造しなくても高い封止性を発揮することができる。
FIG. 2 is a partially enlarged sectional view of the sealing device of FIG. In this embodiment, since the resin ring 10 in which a part of the first plate part 12 and a part of the second plate part 14 are connected by the connecting part 16 is used, it has a conventional substantially rectangular cross section. Compared to the resin ring 101 (see FIG. 16), it is possible to reduce the thickness of the portion that is brought into close contact with the outer surface of the valve body 6 and increase its flexibility. As described above, since the portion that is brought into close contact with the outer surface of the valve body 6 (that is, the second plate portion 14) is highly flexible, even if the resin ring 10 formed of a hard material is used, the valve body 6 The adhesion of the second plate portion 14 to the outer surface is high. For example, as shown in FIG. 2, even if the entire second plate portion 14 is not completely in close contact with the valve body 6, any portion of the second plate portion 14 is in close contact with the valve body 6. . Furthermore, since the flexibility of the second plate portion 14 is high, the second plate portion 14 can follow the outer surface of the valve body 6 even when the valve body 6 rotates. Therefore, high sealing performance can be exhibited without manufacturing a curved surface that is brought into close contact with the outer surface of the valve body 6 of the resin ring 10 with strict dimensional tolerances.
また、見方を変えれば、樹脂リング10は、周溝20を有する中空構造である。したがって、図2の矢印で示すように、弁体6の外側かつ弁箱3の内側の空間35にある流体から第2の板部分14に圧力Pが与えられると、第2の板部分14が半径方向に縮小して、第2の板部分14の湾曲面が弁体6の外面により強く密着させられる。
In other words, the resin ring 10 has a hollow structure having a circumferential groove 20. Therefore, as shown by the arrow in FIG. 2, when pressure P is applied to the second plate portion 14 from the fluid in the space 35 outside the valve body 6 and inside the valve box 3, the second plate portion 14 is By contracting in the radial direction, the curved surface of the second plate portion 14 is more closely attached to the outer surface of the valve body 6.
不可欠ではないが、この実施形態では円形溝32が管4の端部の段差部22に形成されており、この円形溝32にOリング30が嵌め込まれている。したがって、Oリング30は定位置に固定されており、かつ径方向において外側からも内側からも圧縮されている。このため、Oリング30は、円周方向にわたって一定の樹脂リングに向かう力を樹脂リング10に与え、樹脂リング10を弁体6の外面に適切に押圧することができる。
Although not essential, in this embodiment, the circular groove 32 is formed in the stepped portion 22 at the end of the tube 4, and the O-ring 30 is fitted in the circular groove 32. Therefore, the O-ring 30 is fixed at a fixed position, and is compressed from the outside and the inside in the radial direction. For this reason, the O-ring 30 can apply a force toward the resin ring 10 in the circumferential direction to the resin ring 10 and appropriately press the resin ring 10 against the outer surface of the valve body 6.
変形例
図3は、本発明の第1実施形態の変形例に係る密封装置40を示す。図3以降の図面において、第1実施形態と共通する構成要素を示すため、同一の符号が使用され、それらの構成要素については詳細には説明しない。 Modification FIG. 3 shows a sealingdevice 40 according to a modification of the first embodiment of the present invention. In the drawings subsequent to FIG. 3, the same reference numerals are used to indicate the same components as those in the first embodiment, and the components will not be described in detail.
図3は、本発明の第1実施形態の変形例に係る密封装置40を示す。図3以降の図面において、第1実施形態と共通する構成要素を示すため、同一の符号が使用され、それらの構成要素については詳細には説明しない。 Modification FIG. 3 shows a sealing
この変形例に係る密封装置40は、第1実施形態とは異なる形状の樹脂リング41を備える。樹脂リング41は、第1実施形態と同じく、平坦な円板である第1の板部分42と、湾曲した円板である第2の板部分44と、第1の板部分42の一部と第2の板部分44の一部とを連結する円筒である連結部分46とを有する。第1の板部分42、第2の板部分44および連結部分46は、同軸に配置され、一体成形されている。
The sealing device 40 according to this modification includes a resin ring 41 having a shape different from that of the first embodiment. As in the first embodiment, the resin ring 41 includes a first plate portion 42 that is a flat disc, a second plate portion 44 that is a curved disc, and a portion of the first plate portion 42. And a connecting portion 46 which is a cylinder connecting a part of the second plate portion 44. The 1st board part 42, the 2nd board part 44, and the connection part 46 are arrange | positioned coaxially, and are integrally molded.
樹脂リング41には、その中心軸線に沿って延びる中心孔48が形成されている。中心孔48は管4の内孔5にほぼ同軸に配列される。したがって、弁体6の回転に伴って、弁体6の開口部8が樹脂リング41の中心孔48に重なると、中心孔48を介して、流路空間7から管4の内孔5へ流体が流れることが可能となる。
The resin ring 41 is formed with a center hole 48 extending along the center axis. The central hole 48 is arranged substantially coaxially in the inner hole 5 of the tube 4. Therefore, when the opening 8 of the valve body 6 overlaps the center hole 48 of the resin ring 41 as the valve body 6 rotates, fluid flows from the flow path space 7 to the inner hole 5 of the tube 4 via the center hole 48. Can flow.
この変形例では、第1の板部分42の半径方向外側の端縁と、第2の板部分44の半径方向外側の端縁が、連結部分46により連結されている。したがって、樹脂リング41の内周面には、一様な深さ(半径方向に沿って測った深さ)の切欠きすなわち周溝50が形成されている。
In this modification, the radially outer edge of the first plate portion 42 and the radially outer edge of the second plate portion 44 are connected by a connecting portion 46. Therefore, a notch, that is, a circumferential groove 50 having a uniform depth (depth measured along the radial direction) is formed on the inner peripheral surface of the resin ring 41.
第1の板部分42は、管4の端部に形成された段差部22と弁体6との間に配置される。第2の板部分44は、弁体6の外面に対向し、その外面に密着させられる。第2の板部分44は、弁体6の湾曲した外面に適合する湾曲した面を有するが、その面全体が弁体6に完全に接触する必要はない。
The first plate portion 42 is disposed between the step portion 22 formed at the end portion of the tube 4 and the valve body 6. The second plate portion 44 faces the outer surface of the valve body 6 and is brought into close contact with the outer surface. The second plate portion 44 has a curved surface that conforms to the curved outer surface of the valve body 6, but the entire surface need not be in full contact with the valve body 6.
図4は、図3の密封装置の一部拡大断面図である。この変形例においても、第1実施形態と同じ効果を達成することが可能である。
FIG. 4 is a partially enlarged sectional view of the sealing device of FIG. Also in this modification, it is possible to achieve the same effect as the first embodiment.
他の変形
上記の第1実施形態および変形例においては、弾性体リングとしてOリング30、すなわちリングに対して垂直な断面の形状が円形であるリングが使用されている。しかしながら、弾性体リングの断面形状が円形である必要は必ずしもなく、他の様々な断面形状の弾性リングを使用してもよい。例えば、断面形状がX字状であるXリング、断面形状がD字状であるDリング、断面形状が三角形であるリングを使用することができる。図5は、第1実施形態において、Oリング30の代わりにDリング55を使用した変形例を示す。 Other Modifications In the first embodiment and the modification described above, the O-ring 30, that is, a ring having a circular cross section perpendicular to the ring is used as the elastic ring. However, the elastic ring does not necessarily have a circular cross-sectional shape, and other various elastic ring shapes may be used. For example, an X-ring having an X-shaped cross-section, a D-ring having a D-shaped cross-section, and a ring having a triangular cross-section can be used. FIG. 5 shows a modification in which a D-ring 55 is used instead of the O-ring 30 in the first embodiment.
上記の第1実施形態および変形例においては、弾性体リングとしてOリング30、すなわちリングに対して垂直な断面の形状が円形であるリングが使用されている。しかしながら、弾性体リングの断面形状が円形である必要は必ずしもなく、他の様々な断面形状の弾性リングを使用してもよい。例えば、断面形状がX字状であるXリング、断面形状がD字状であるDリング、断面形状が三角形であるリングを使用することができる。図5は、第1実施形態において、Oリング30の代わりにDリング55を使用した変形例を示す。 Other Modifications In the first embodiment and the modification described above, the O-
第2実施形態
本発明の第2実施形態にかかる密封装置は、弁箱と、湾曲した外面を有し、前記弁箱内に回転可能に配置されて流体の流れを制御する弁体と、前記弁箱に連結されているか前記弁箱の一部である管とを備える弁装置に使用され、前記管の内孔と、前記弁体の外側かつ前記弁箱の内側の空間との間を密封する密封装置であって、樹脂によって形成され、前記弁体の外面に接触させられる樹脂リングと、弾性体から形成され、前記樹脂リングの一部を前記弁体に向けて押圧する弾性体リングとを備え、前記樹脂リングは、前記内孔に通じており、流体が流動可能な中心孔と、前記管の端部に形成された段差部と前記弁体との間に配置される第1の板部分と、前記弁体の外面に密着させられる第2の板部分と、前記第1の板部分の一部と前記第2の板部分の一部とを連結する連結部分とを備え、前記弾性体リングは、前記樹脂リングの前記第1の板部分と前記第2の板部分との間の周溝内に嵌め込まれ、前記第2の板部分を前記弁体に向けて押圧し、前記第1の板部分を前記管の端部の前記段差部に向けて押圧することを特徴とする。
図6は、本発明の第2実施形態に係る密封装置1の断面図である。この密封装置1は、弁箱3と、弁箱3に連結されているか弁箱3の一部であって流体が流れる管4と、弁箱3内に配置されて流体の流れを制御する弁体6を備える弁装置に適用される。弁箱3、管4および弁体6は、硬質の材料、例えば金属またはPPS(ポリフェニレンサルファイド)樹脂から形成されている。 Second Embodiment A sealing device according to a second embodiment of the present invention has a valve box, a valve body that has a curved outer surface, is rotatably arranged in the valve box, and controls the flow of fluid, Used in a valve device comprising a pipe that is connected to a valve box or part of the valve box, and seals between the inner hole of the pipe and the space outside the valve body and inside the valve box A sealing ring that is formed of resin and is brought into contact with the outer surface of the valve body; and an elastic body ring that is formed of an elastic body and presses a part of the resin ring toward the valve body. The resin ring communicates with the inner hole, and is arranged between a center hole through which a fluid can flow, a step formed at an end of the tube, and the valve body. A plate portion, a second plate portion that is brought into close contact with the outer surface of the valve body, and a part of the first plate portion And a connecting portion that connects a part of the second plate portion, and the elastic ring is in a circumferential groove between the first plate portion and the second plate portion of the resin ring. The second plate portion is pressed toward the valve body, and the first plate portion is pressed toward the stepped portion at the end of the tube.
FIG. 6 is a cross-sectional view of thesealing device 1 according to the second embodiment of the present invention. The sealing device 1 includes a valve box 3, a pipe 4 connected to the valve box 3 or a part of the valve box 3 through which a fluid flows, and a valve disposed in the valve box 3 to control the flow of the fluid. The present invention is applied to a valve device including a body 6. The valve box 3, the pipe 4 and the valve body 6 are made of a hard material such as metal or PPS (polyphenylene sulfide) resin.
本発明の第2実施形態にかかる密封装置は、弁箱と、湾曲した外面を有し、前記弁箱内に回転可能に配置されて流体の流れを制御する弁体と、前記弁箱に連結されているか前記弁箱の一部である管とを備える弁装置に使用され、前記管の内孔と、前記弁体の外側かつ前記弁箱の内側の空間との間を密封する密封装置であって、樹脂によって形成され、前記弁体の外面に接触させられる樹脂リングと、弾性体から形成され、前記樹脂リングの一部を前記弁体に向けて押圧する弾性体リングとを備え、前記樹脂リングは、前記内孔に通じており、流体が流動可能な中心孔と、前記管の端部に形成された段差部と前記弁体との間に配置される第1の板部分と、前記弁体の外面に密着させられる第2の板部分と、前記第1の板部分の一部と前記第2の板部分の一部とを連結する連結部分とを備え、前記弾性体リングは、前記樹脂リングの前記第1の板部分と前記第2の板部分との間の周溝内に嵌め込まれ、前記第2の板部分を前記弁体に向けて押圧し、前記第1の板部分を前記管の端部の前記段差部に向けて押圧することを特徴とする。
図6は、本発明の第2実施形態に係る密封装置1の断面図である。この密封装置1は、弁箱3と、弁箱3に連結されているか弁箱3の一部であって流体が流れる管4と、弁箱3内に配置されて流体の流れを制御する弁体6を備える弁装置に適用される。弁箱3、管4および弁体6は、硬質の材料、例えば金属またはPPS(ポリフェニレンサルファイド)樹脂から形成されている。 Second Embodiment A sealing device according to a second embodiment of the present invention has a valve box, a valve body that has a curved outer surface, is rotatably arranged in the valve box, and controls the flow of fluid, Used in a valve device comprising a pipe that is connected to a valve box or part of the valve box, and seals between the inner hole of the pipe and the space outside the valve body and inside the valve box A sealing ring that is formed of resin and is brought into contact with the outer surface of the valve body; and an elastic body ring that is formed of an elastic body and presses a part of the resin ring toward the valve body. The resin ring communicates with the inner hole, and is arranged between a center hole through which a fluid can flow, a step formed at an end of the tube, and the valve body. A plate portion, a second plate portion that is brought into close contact with the outer surface of the valve body, and a part of the first plate portion And a connecting portion that connects a part of the second plate portion, and the elastic ring is in a circumferential groove between the first plate portion and the second plate portion of the resin ring. The second plate portion is pressed toward the valve body, and the first plate portion is pressed toward the stepped portion at the end of the tube.
FIG. 6 is a cross-sectional view of the
密封装置1が適用される弁装置は、例えば、内燃機関の冷却水(冷媒)をラジエータに供給する弁装置であってもよいし、油圧機器のオイルを所望の流路に分配する弁装置であってもよいが、他の弁装置であってもよい。弁装置が制御する流体は、冷却水のような冷媒またはオイルであってもよいが、他の流体であってもよい。
The valve device to which the sealing device 1 is applied may be, for example, a valve device that supplies cooling water (refrigerant) of an internal combustion engine to a radiator, or a valve device that distributes oil of hydraulic equipment to a desired flow path. There may be other valve devices. The fluid controlled by the valve device may be a refrigerant or oil such as cooling water, but may be another fluid.
弁体6は、弁箱3内で回転可能であって、その回転に伴って、管4を通過する流体の流量が調節される。図6においては、弁箱3と弁体6の一部のみを示すが、弁体6は球状または円柱状の外面形状を有する。弁体6は、図の矢印に示すように、円弧方向に沿って回転可能である。
The valve body 6 is rotatable in the valve box 3, and the flow rate of the fluid passing through the pipe 4 is adjusted with the rotation. In FIG. 6, although only a part of the valve box 3 and the valve body 6 is shown, the valve body 6 has a spherical or cylindrical outer surface shape. The valve body 6 is rotatable along the arc direction as shown by the arrows in the figure.
弁体6の内部には、流体(例えば、オイル、水、冷媒)が流れる流路空間7が設けられ、流路空間7は、弁体6の壁を貫通する開口部8で開口する。弁体6の回転に伴って、開口部8が管4の内孔5に通ずると、流路空間7から内孔5へ流体が流れることが可能となる。逆に、弁体6の回転に伴って、開口部8が内孔5から離れると、流路空間7と内孔5の間の流路が閉塞させられる。また、開口部8と内孔5の重なりの程度に応じて、流体の流量が調節される。図示の管4は弁箱3の下流に設けられ、弁箱3を通った流体が管4を通過するが、管4は弁箱3の上流に設けられ、管4を通った流体が弁箱3を通過してもよい。
Inside the valve body 6, a flow path space 7 through which a fluid (for example, oil, water, refrigerant) flows is provided, and the flow path space 7 opens at an opening 8 that penetrates the wall of the valve body 6. When the opening 8 passes through the inner hole 5 of the pipe 4 along with the rotation of the valve body 6, the fluid can flow from the flow path space 7 to the inner hole 5. Conversely, when the opening 8 is separated from the inner hole 5 as the valve body 6 rotates, the flow path between the flow path space 7 and the inner hole 5 is blocked. Further, the flow rate of the fluid is adjusted according to the degree of overlap between the opening 8 and the inner hole 5. The illustrated pipe 4 is provided downstream of the valve box 3, and the fluid passing through the valve box 3 passes through the pipe 4. The pipe 4 is provided upstream of the valve box 3, and the fluid passing through the pipe 4 is supplied to the valve box. 3 may be passed.
密封装置1は、管4の内孔5と、弁体6の外側かつ弁箱3の内側の空間35との間を密封して、これらの間の流体の流れを防止するために使用される。密封装置1は、樹脂リング10と、樹脂リング10の一部を弁体6に向けて押圧する押圧機構(この実施形態ではOリング31)を有する。
The sealing device 1 is used to seal between the inner hole 5 of the tube 4 and the space 35 outside the valve body 6 and inside the valve box 3 to prevent fluid flow therebetween. . The sealing device 1 includes a resin ring 10 and a pressing mechanism (O-ring 31 in this embodiment) that presses a part of the resin ring 10 toward the valve body 6.
樹脂リング10は、樹脂によって環状に形成されている。好ましくは、樹脂リング10は摩擦係数が小さい硬質の材料から形成されている。樹脂リング10の好適な材料の例は、ポリテトラフルオロエチレン(PTFE)であるが、他の樹脂であってもよい。
The resin ring 10 is formed in an annular shape with resin. Preferably, the resin ring 10 is formed of a hard material having a small friction coefficient. An example of a suitable material for the resin ring 10 is polytetrafluoroethylene (PTFE), but other resins may be used.
樹脂リング10は、第1の板部分12と、第2の板部分14と、第1の板部分12の一部と第2の板部分14の一部とを連結する連結部分16とを有する。第1の板部分12は平坦な円板であり、第2の板部分14は湾曲した円板であり、連結部分16は円筒である。第1の板部分12、第2の板部分14および連結部分16は、同軸に配置され、一体成形されている。
The resin ring 10 includes a first plate portion 12, a second plate portion 14, and a connecting portion 16 that connects a part of the first plate portion 12 and a part of the second plate portion 14. . The first plate portion 12 is a flat disc, the second plate portion 14 is a curved disc, and the connecting portion 16 is a cylinder. The 1st board part 12, the 2nd board part 14, and the connection part 16 are arrange | positioned coaxially, and are integrally molded.
樹脂リング10には、その中心軸線に沿って延びる中心孔18が形成されている。中心孔18は管4の内孔5にほぼ同軸に配列される。したがって、上記の通り、弁体6の回転に伴って、弁体6の開口部8が樹脂リング10の中心孔18に重なると、中心孔18を介して、流路空間7から管4の内孔5へ流体が流れることが可能となる。
The resin ring 10 is formed with a central hole 18 extending along its central axis. The central hole 18 is arranged substantially coaxially in the inner hole 5 of the tube 4. Therefore, as described above, when the opening 8 of the valve body 6 overlaps with the center hole 18 of the resin ring 10 as the valve body 6 rotates, the inside of the tube 4 from the flow path space 7 through the center hole 18. The fluid can flow to the hole 5.
この実施形態では、第1の板部分12の中心孔18側の端縁と、第2の板部分14の中心孔18側の端縁が、連結部分16により連結されている。したがって、樹脂リング10の外周面には、一様な深さ(半径方向に沿って測った深さ)の切欠きすなわち周溝20が形成されている。
In this embodiment, the edge on the center hole 18 side of the first plate portion 12 and the edge on the center hole 18 side of the second plate portion 14 are connected by the connecting portion 16. Therefore, a cutout, that is, a circumferential groove 20 having a uniform depth (depth measured along the radial direction) is formed on the outer peripheral surface of the resin ring 10.
第1の板部分12は、管4の端部に形成された段差部22と弁体6との間に配置される。第2の板部分14は、弁体6の外面に対向し、その外面に密着させられる。第2の板部分14は、弁体6の湾曲した外面に適合する湾曲した面を有するが、その面全体が弁体6に完全に接触する必要はない。
The first plate portion 12 is disposed between the step portion 22 formed at the end portion of the tube 4 and the valve body 6. The second plate portion 14 faces the outer surface of the valve body 6 and is brought into close contact with the outer surface. The second plate portion 14 has a curved surface that conforms to the curved outer surface of the valve body 6, but the entire surface need not be in full contact with the valve body 6.
上述したように、樹脂リング10の一部は、押圧機構によって弁体6に向けて押圧される。この実施形態において、押圧機構は、樹脂リング10の第1の板部分12と第2の板部分14との間の周溝20内に嵌め込まれるOリング(弾性体リング)31である。Oリング31は、樹脂リング10の材料よりも弾性が高い弾性体、例えばエラストマーから形成されたリングである。Oリング31は、弾性復元力によって第2の板部分14を弁体6に向けて押圧する。また、Oリング31は、弾性復元力によって第1の板部分12を管4の端部の段差部22に向けて押圧する。
As described above, a part of the resin ring 10 is pressed toward the valve body 6 by the pressing mechanism. In this embodiment, the pressing mechanism is an O-ring (elastic ring) 31 that is fitted into the circumferential groove 20 between the first plate portion 12 and the second plate portion 14 of the resin ring 10. The O-ring 31 is a ring formed of an elastic body having a higher elasticity than the material of the resin ring 10, for example, an elastomer. The O-ring 31 presses the second plate portion 14 toward the valve body 6 by an elastic restoring force. The O-ring 31 presses the first plate portion 12 toward the stepped portion 22 at the end of the tube 4 by an elastic restoring force.
この実施形態に係る弁装置においては、弁体6の外側かつ弁箱3の内側の空間35にも流体が存在しうる。樹脂リング10とOリング31は、協働して、空間35から管4の内孔5への流体の流れ、およびその逆の流れを阻止する。より具体的には、樹脂リング10の第1の板部分12の半径方向外側の端縁と、その外側の管4の壁部との間に隙間があったとしても、Oリング31の押圧力を受けて、第1の板部分12が管4の端部の段差部22に密着させられ、空間35と管4の内孔5との間を遮蔽する。このようにして、Oリング31が樹脂リング10の封止性能を補完する。
In the valve device according to this embodiment, fluid can also exist in the space 35 outside the valve body 6 and inside the valve box 3. The resin ring 10 and the O-ring 31 cooperate to prevent the flow of fluid from the space 35 to the inner hole 5 of the tube 4 and vice versa. More specifically, even if there is a gap between the radially outer edge of the first plate portion 12 of the resin ring 10 and the wall portion of the tube 4 on the outer side, the pressing force of the O-ring 31 In response to this, the first plate portion 12 is brought into close contact with the stepped portion 22 at the end of the tube 4 to shield the space 35 from the inner hole 5 of the tube 4. In this way, the O-ring 31 supplements the sealing performance of the resin ring 10.
図7は、図6の密封装置の一部拡大断面図である。この実施形態においては、第1の板部分12の一部と第2の板部分14の一部が連結部分16によって連結されている樹脂リング10が使用されるため、従来のほぼ矩形断面を有する樹脂リング101(図16参照)に比べて、弁体6の外面に密着させられる部分の厚さを小さくし、その可撓性を高めることが可能である。このように弁体6の外面に密着させられる部分(すなわち第2の板部分14)の可撓性が高いため、硬質の材料から形成された樹脂リング10を使用しても、弁体6の外面に対する第2の板部分14の密着性が高い。例えば、図7に示すように、第2の板部分14の全体が弁体6に完全に密着していなくても、第2の板部分14のいずれかの部分が弁体6に密着させられる。さらに、第2の板部分14の可撓性が高いため、弁体6が回転しても、第2の板部分14が弁体6の外面に追随することができる。そして、Oリング31が弾性復元力によって第2の板部分14を弁体6の外面に押圧する。したがって、樹脂リング10の弁体6の外面に密着させられる湾曲面を厳密な寸法公差で製造しなくても高い封止性を発揮することができる。
FIG. 7 is a partially enlarged sectional view of the sealing device of FIG. In this embodiment, since the resin ring 10 in which a part of the first plate part 12 and a part of the second plate part 14 are connected by the connecting part 16 is used, it has a conventional substantially rectangular cross section. Compared to the resin ring 101 (see FIG. 16), it is possible to reduce the thickness of the portion that is brought into close contact with the outer surface of the valve body 6 and increase its flexibility. As described above, since the portion that is brought into close contact with the outer surface of the valve body 6 (that is, the second plate portion 14) is highly flexible, even if the resin ring 10 formed of a hard material is used, the valve body 6 The adhesion of the second plate portion 14 to the outer surface is high. For example, as shown in FIG. 7, even if the entire second plate portion 14 is not completely in contact with the valve body 6, any portion of the second plate portion 14 is in close contact with the valve body 6. . Furthermore, since the flexibility of the second plate portion 14 is high, the second plate portion 14 can follow the outer surface of the valve body 6 even when the valve body 6 rotates. Then, the O-ring 31 presses the second plate portion 14 against the outer surface of the valve body 6 by an elastic restoring force. Therefore, high sealing performance can be exhibited without manufacturing a curved surface that is brought into close contact with the outer surface of the valve body 6 of the resin ring 10 with strict dimensional tolerances.
また、見方を変えれば、樹脂リング10は、周溝20を有する中空構造である。したがって、図7の矢印で示すように、弁体6の外側かつ弁箱3の内側の空間35にある流体から第2の板部分14に圧力Pが与えられると、第2の板部分14が半径方向に縮小して、第2の板部分14の湾曲面が弁体6の外面により強く密着させられる。
In other words, the resin ring 10 has a hollow structure having a circumferential groove 20. Therefore, as shown by the arrow in FIG. 7, when the pressure P is applied to the second plate portion 14 from the fluid in the space 35 outside the valve body 6 and inside the valve box 3, the second plate portion 14 is By contracting in the radial direction, the curved surface of the second plate portion 14 is more closely attached to the outer surface of the valve body 6.
さらに、この実施形態では、樹脂リング10の連結部分16は、第1の板部分12の中心孔18側の端縁と、第2の板部分14の中心孔18側の端縁とを連結する。したがって、Oリング31が連結部分16に対して半径方向外側に配置され、Oリング31が第2の板部分14を、弁体6の湾曲した外面に強く押圧することが可能である。特に、弁体6の外側かつ弁箱3の内側の空間35にある流体からOリング31に圧力Pが与えられると、Oリング31が半径方向に縮小して、第2の板部分14の湾曲面が弁体6の外面により強く密着させられる。
Further, in this embodiment, the connecting portion 16 of the resin ring 10 connects the edge of the first plate portion 12 on the side of the center hole 18 and the edge of the second plate portion 14 on the side of the center hole 18. . Therefore, the O-ring 31 is disposed on the radially outer side with respect to the connecting portion 16, and the O-ring 31 can strongly press the second plate portion 14 against the curved outer surface of the valve body 6. In particular, when pressure P is applied to the O-ring 31 from a fluid in the space 35 outside the valve body 6 and inside the valve box 3, the O-ring 31 contracts in the radial direction and the second plate portion 14 is curved. The surface is more closely attached to the outer surface of the valve body 6.
第1変形例
図8は、本発明の第2実施形態の第1変形例に係る密封装置60を示す。図8以降の図面において、第2実施形態と共通する構成要素を示すため、同一の符号が使用され、それらの構成要素については詳細には説明しない。 First Modification FIG. 8 shows a sealingdevice 60 according to a first modification of the second embodiment of the present invention. In FIG. 8 and the subsequent drawings, the same reference numerals are used to indicate constituent elements common to the second embodiment, and the constituent elements will not be described in detail.
図8は、本発明の第2実施形態の第1変形例に係る密封装置60を示す。図8以降の図面において、第2実施形態と共通する構成要素を示すため、同一の符号が使用され、それらの構成要素については詳細には説明しない。 First Modification FIG. 8 shows a sealing
この変形例に係る密封装置60は、第2実施形態とは異なる形状の樹脂リング51を備える。樹脂リング51は、第2実施形態と同じく、平坦な円板である第1の板部分52と、湾曲した円板である第2の板部分54と、第1の板部分52の一部と第2の板部分54の一部とを連結する円筒である連結部分56とを有する。第1の板部分52、第2の板部分54および連結部分56は、同軸に配置され、一体成形されている。
The sealing device 60 according to this modification includes a resin ring 51 having a shape different from that of the second embodiment. As in the second embodiment, the resin ring 51 includes a first plate portion 52 that is a flat disc, a second plate portion 54 that is a curved disc, and a portion of the first plate portion 52. It has the connection part 56 which is a cylinder which connects a part of 2nd board part 54. As shown in FIG. The 1st board part 52, the 2nd board part 54, and the connection part 56 are arrange | positioned coaxially, and are integrally molded.
樹脂リング51には、その中心軸線に沿って延びる中心孔58が形成されている。中心孔58は管4の内孔5にほぼ同軸に配列される。したがって、弁体6の回転に伴って、弁体6の開口部8が樹脂リング51の中心孔58に重なると、中心孔58を介して、流路空間7から管4の内孔5へ流体が流れることが可能となる。
The resin ring 51 is formed with a center hole 58 extending along the center axis. The center hole 58 is arranged substantially coaxially in the inner hole 5 of the tube 4. Accordingly, when the opening 8 of the valve body 6 overlaps the center hole 58 of the resin ring 51 as the valve body 6 rotates, fluid flows from the flow path space 7 to the inner hole 5 of the tube 4 via the center hole 58. Can flow.
この変形例では、第1の板部分52の半径方向外側の端縁と、第2の板部分54の半径方向外側の端縁が、連結部分56により連結されている。したがって、樹脂リング51の内周面には、一様な深さ(半径方向に沿って測った深さ)の切欠きすなわち周溝70が形成されている。
In this modification, the radially outer edge of the first plate portion 52 and the radially outer edge of the second plate portion 54 are connected by a connecting portion 56. Therefore, a notch, that is, a circumferential groove 70 having a uniform depth (depth measured along the radial direction) is formed on the inner peripheral surface of the resin ring 51.
第1の板部分52は、管4の端部に形成された段差部22と弁体6との間に配置される。第2の板部分54は、弁体6の外面に対向し、その外面に密着させられる。第2の板部分54は、弁体6の湾曲した外面に適合する湾曲した面を有するが、その面全体が弁体6に完全に接触する必要はない。樹脂リング51の一部は、押圧機構によって弁体6に向けて押圧される。この変形例において、押圧機構は、樹脂リング51の第1の板部分52と第2の板部分54との間の周溝70内に嵌め込まれるOリング(弾性体リング)31である。Oリング31は、樹脂リング51の材料よりも弾性が高い弾性体、例えばエラストマーから形成されたリングである。Oリング31は、弾性復元力によって第2の板部分54を弁体6に向けて押圧する。また、Oリング31は、弾性復元力によって第1の板部分52を管4の端部の段差部22に向けて押圧する。
The first plate portion 52 is disposed between the step portion 22 formed at the end portion of the tube 4 and the valve body 6. The second plate portion 54 faces the outer surface of the valve body 6 and is brought into close contact with the outer surface. The second plate portion 54 has a curved surface that conforms to the curved outer surface of the valve body 6, but the entire surface need not be in full contact with the valve body 6. A part of the resin ring 51 is pressed toward the valve body 6 by the pressing mechanism. In this modification, the pressing mechanism is an O-ring (elastic ring) 31 that is fitted in the circumferential groove 70 between the first plate portion 52 and the second plate portion 54 of the resin ring 51. The O-ring 31 is a ring formed of an elastic body having a higher elasticity than the material of the resin ring 51, for example, an elastomer. The O-ring 31 presses the second plate portion 54 toward the valve body 6 by an elastic restoring force. The O-ring 31 presses the first plate portion 52 toward the stepped portion 22 at the end of the tube 4 by an elastic restoring force.
図9は、図8の密封装置の一部拡大断面図である。この変形例においては、第1の板部分52の一部と第2の板部分54の一部が連結部分56によって連結されている樹脂リング60が使用されるため、従来のほぼ矩形断面を有する樹脂リング101(図16参照)に比べて、弁体6の外面に密着させられる部分の厚さを小さくし、その可撓性を高めることが可能である。このように弁体6の外面に密着させられる部分(すなわち第2の板部分54)の可撓性が高いため、硬質の材料から形成された樹脂リング60を使用しても、弁体6の外面に対する第2の板部分54の密着性が高い。例えば、図9に示すように、第2の板部分54の全体が弁体6に完全に密着していなくても、第2の板部分54のいずれかの部分が弁体6に密着させられる。さらに、第2の板部分54の可撓性が高いため、弁体6が回転しても、第2の板部分54が弁体6の外面に追随することができる。そして、Oリング31が弾性復元力によって第2の板部分54を弁体6の外面に押圧する。したがって、樹脂リング60の弁体6の外面に密着させられる湾曲面を厳密な寸法公差で製造しなくても高い封止性を発揮することができる。
FIG. 9 is a partially enlarged cross-sectional view of the sealing device of FIG. In this modification, since a resin ring 60 in which a part of the first plate part 52 and a part of the second plate part 54 are connected by the connecting part 56 is used, it has a conventional substantially rectangular cross section. Compared to the resin ring 101 (see FIG. 16), it is possible to reduce the thickness of the portion that is brought into close contact with the outer surface of the valve body 6 and increase its flexibility. As described above, since the portion (that is, the second plate portion 54) closely attached to the outer surface of the valve body 6 is highly flexible, even if the resin ring 60 formed of a hard material is used, the valve body 6 The adhesion of the second plate portion 54 to the outer surface is high. For example, as shown in FIG. 9, even if the entire second plate portion 54 is not completely in contact with the valve body 6, any portion of the second plate portion 54 is in close contact with the valve body 6. . Furthermore, since the flexibility of the second plate portion 54 is high, the second plate portion 54 can follow the outer surface of the valve body 6 even when the valve body 6 rotates. Then, the O-ring 31 presses the second plate portion 54 against the outer surface of the valve body 6 by an elastic restoring force. Therefore, high sealing performance can be exhibited without manufacturing a curved surface that is brought into close contact with the outer surface of the valve body 6 of the resin ring 60 with strict dimensional tolerances.
また、見方を変えれば、樹脂リング60は、周溝70を有する中空構造である。したがって、図7の矢印で示すように、弁体6の外側かつ弁箱3の内側の空間35にある流体から連結部分56に圧力Pが与えられると、第2の板部分54が半径方向に縮小して、第2の板部分54の湾曲面が弁体6の外面により強く密着させられる。
In other words, the resin ring 60 has a hollow structure having a circumferential groove 70. Therefore, as shown by the arrow in FIG. 7, when pressure P is applied to the connecting portion 56 from the fluid in the space 35 outside the valve body 6 and inside the valve box 3, the second plate portion 54 is moved radially. By contracting, the curved surface of the second plate portion 54 is more closely attached to the outer surface of the valve body 6.
但し、Oリング31は、弾性復元力によって連結部分56を半径方向外側に広げるように押圧してもよい。この場合には、連結部分56はその外側にある壁部に密着する。
However, the O-ring 31 may be pressed so as to spread the connecting portion 56 radially outward by an elastic restoring force. In this case, the connecting portion 56 is in close contact with the wall portion on the outside thereof.
第2変形例
図10は、本発明の第2実施形態の第2変形例に係る密封装置61を示す。この密封装置61は、第2実施形態の密封装置1(図6)の構成に加え、樹脂リング10全体を弁体6に向けて押圧する第2の押圧機構(この実施形態ではOリング62)を有する。Oリング62は、樹脂リング10の材料よりも弾性が高い弾性体、例えばエラストマーから形成されたリングである。Oリング62は、管4の端部の段差部22に設置される。Oリング62は、樹脂リング10の第1の板部分12に接触しており、弾性復元力によって樹脂リング10の全体を弁体6に向けて押圧する。 Second Modification FIG. 10 shows a sealingdevice 61 according to a second modification of the second embodiment of the present invention. In addition to the configuration of the sealing device 1 (FIG. 6) of the second embodiment, the sealing device 61 includes a second pressing mechanism (O-ring 62 in this embodiment) that presses the entire resin ring 10 toward the valve body 6. Have The O-ring 62 is a ring formed from an elastic body, such as an elastomer, having higher elasticity than the material of the resin ring 10. The O-ring 62 is installed at the stepped portion 22 at the end of the tube 4. The O-ring 62 is in contact with the first plate portion 12 of the resin ring 10 and presses the entire resin ring 10 toward the valve body 6 by an elastic restoring force.
図10は、本発明の第2実施形態の第2変形例に係る密封装置61を示す。この密封装置61は、第2実施形態の密封装置1(図6)の構成に加え、樹脂リング10全体を弁体6に向けて押圧する第2の押圧機構(この実施形態ではOリング62)を有する。Oリング62は、樹脂リング10の材料よりも弾性が高い弾性体、例えばエラストマーから形成されたリングである。Oリング62は、管4の端部の段差部22に設置される。Oリング62は、樹脂リング10の第1の板部分12に接触しており、弾性復元力によって樹脂リング10の全体を弁体6に向けて押圧する。 Second Modification FIG. 10 shows a sealing
この変形例では、段差部22にOリング62を受け入れるための円形溝64が形成されている。円形溝64は内孔5と同心に設けられている。但し、円形溝64は必ずしも設けなくてもよい。
In this modification, a circular groove 64 for receiving the O-ring 62 is formed in the step portion 22. The circular groove 64 is provided concentrically with the inner hole 5. However, the circular groove 64 is not necessarily provided.
樹脂リング10とOリング62は、協働して、弁体6の外側かつ弁箱3の内側の空間35から管4の内孔5への流体の流れ、およびその逆の流れを阻止する。より具体的には、樹脂リング10の第1の板部分12の半径方向外側の端縁と、その外側の管4の壁部との間に隙間があったとしても、第1の板部分12と管4の端部との間に介在するOリング62が空間35と管4の内孔5との間を遮蔽する。このようにして、Oリング62が樹脂リング10の封止性能を補完する。
The resin ring 10 and the O-ring 62 cooperate to block the flow of fluid from the space 35 outside the valve body 6 and inside the valve box 3 to the inner hole 5 of the tube 4 and vice versa. More specifically, even if there is a gap between the radially outer edge of the first plate portion 12 of the resin ring 10 and the wall portion of the tube 4 on the outer side, the first plate portion 12 will be described. An O-ring 62 interposed between the tube 35 and the end of the tube 4 shields the space 35 from the inner hole 5 of the tube 4. In this way, the O-ring 62 supplements the sealing performance of the resin ring 10.
不可欠ではないが、この変形例では円形溝64が管4の端部の段差部22に形成されており、この円形溝64にOリング62が嵌め込まれている。したがって、Oリング62は定位置に固定されており、かつ径方向において外側からも内側からも圧縮されている。このため、Oリング62は、円周方向にわたって一定の樹脂リング10に向かう力を樹脂リング10に与え、樹脂リング10を弁体6の外面に適切に押圧することができる。
Although not essential, in this modification, a circular groove 64 is formed in the stepped portion 22 at the end of the tube 4, and an O-ring 62 is fitted in the circular groove 64. Therefore, the O-ring 62 is fixed at a fixed position and is compressed from the outside and the inside in the radial direction. For this reason, the O-ring 62 can apply a force toward the resin ring 10 in the circumferential direction to the resin ring 10 and press the resin ring 10 against the outer surface of the valve body 6 appropriately.
第2変形例は、第2実施形態の修正であるが、Oリング62および円形溝64を第2実施形態の第1変形例の構成に追加してもよい。
Although the second modification is a modification of the second embodiment, an O-ring 62 and a circular groove 64 may be added to the configuration of the first modification of the second embodiment.
他の変形
上記の実施形態においては、弾性体リングとしてOリング31、すなわちリングに対して垂直な断面の形状が円形であるリングが使用されている。しかしながら、弾性体リングの断面形状が円形である必要は必ずしもなく、他の様々な断面形状の弾性リングを使用してもよい。例えば、断面形状がX字状であるXリング、断面形状がD字状であるDリング、断面形状が三角形であるリングを使用することができる。図11は、第2実施形態において、Oリング31の代わりにDリング65を使用した変形例を示す。同様に、第二変形例のOリング62の代わりに他の様々な断面形状の弾性リングを使用してもよい。 Other Modifications In the above embodiment, an O-ring 31, that is, a ring having a circular cross section perpendicular to the ring is used as the elastic ring. However, the elastic ring does not necessarily have a circular cross-sectional shape, and other various elastic ring shapes may be used. For example, an X-ring having an X-shaped cross-section, a D-ring having a D-shaped cross-section, and a ring having a triangular cross-section can be used. FIG. 11 shows a modification in which a D ring 65 is used instead of the O ring 31 in the second embodiment. Similarly, other various cross-sectional elastic rings may be used in place of the O-ring 62 of the second modification.
上記の実施形態においては、弾性体リングとしてOリング31、すなわちリングに対して垂直な断面の形状が円形であるリングが使用されている。しかしながら、弾性体リングの断面形状が円形である必要は必ずしもなく、他の様々な断面形状の弾性リングを使用してもよい。例えば、断面形状がX字状であるXリング、断面形状がD字状であるDリング、断面形状が三角形であるリングを使用することができる。図11は、第2実施形態において、Oリング31の代わりにDリング65を使用した変形例を示す。同様に、第二変形例のOリング62の代わりに他の様々な断面形状の弾性リングを使用してもよい。 Other Modifications In the above embodiment, an O-
以下、関連発明について説明する。
本発明の関連発明に係る密封装置は、弁箱と、湾曲した外面を有し、前記弁箱内に回転可能に配置されて流体の流れを制御する弁体と、前記弁箱に連結されているか前記弁箱の一部である管とを備える弁装置に使用され、前記管の内孔と、前記弁体の外側かつ前記弁箱の内側の空間との間を密封する密封装置であって、樹脂によって形成され、前記管の前記内孔に通じており流体が流動可能な中心孔と、前記弁体の外面に対向する湾曲した対向面とを有しており、前記対向面に周溝が形成されている樹脂リングと、弾性体から形成され、前記樹脂リングの前記周溝に嵌め込まれて、前記弁体の外面に密着させられる第1の弾性体リングとを備えることを特徴とする。
図12は、本発明の関連発明に係る密封装置1の断面図である。この密封装置1は、弁箱3と、弁箱3に連結されているか弁箱3の一部であって流体が流れる管4と、弁箱3内に配置されて流体の流れを制御する弁体6を備える弁装置に適用される。弁箱3、管4および弁体6は、硬質の材料、例えば金属またはPPS(ポリフェニレンサルファイド)樹脂から形成されている。 The related invention will be described below.
A sealing device according to a related invention of the present invention is connected to a valve box, a valve body having a curved outer surface and rotatably arranged in the valve box to control the flow of fluid, and the valve box. A sealing device that is used in a valve device including a pipe that is a part of the valve box and seals between an inner hole of the pipe and a space outside the valve body and inside the valve box. A center hole that is formed of resin and communicates with the inner hole of the tube and allows fluid to flow, and a curved facing surface that faces the outer surface of the valve body, and a circumferential groove on the facing surface. And a first elastic ring formed of an elastic body and fitted into the circumferential groove of the resin ring and closely attached to the outer surface of the valve body. .
FIG. 12 is a cross-sectional view of thesealing device 1 according to the related invention of the present invention. The sealing device 1 includes a valve box 3, a pipe 4 connected to the valve box 3 or a part of the valve box 3 through which a fluid flows, and a valve disposed in the valve box 3 to control the flow of the fluid. The present invention is applied to a valve device including a body 6. The valve box 3, the pipe 4 and the valve body 6 are made of a hard material such as metal or PPS (polyphenylene sulfide) resin.
本発明の関連発明に係る密封装置は、弁箱と、湾曲した外面を有し、前記弁箱内に回転可能に配置されて流体の流れを制御する弁体と、前記弁箱に連結されているか前記弁箱の一部である管とを備える弁装置に使用され、前記管の内孔と、前記弁体の外側かつ前記弁箱の内側の空間との間を密封する密封装置であって、樹脂によって形成され、前記管の前記内孔に通じており流体が流動可能な中心孔と、前記弁体の外面に対向する湾曲した対向面とを有しており、前記対向面に周溝が形成されている樹脂リングと、弾性体から形成され、前記樹脂リングの前記周溝に嵌め込まれて、前記弁体の外面に密着させられる第1の弾性体リングとを備えることを特徴とする。
図12は、本発明の関連発明に係る密封装置1の断面図である。この密封装置1は、弁箱3と、弁箱3に連結されているか弁箱3の一部であって流体が流れる管4と、弁箱3内に配置されて流体の流れを制御する弁体6を備える弁装置に適用される。弁箱3、管4および弁体6は、硬質の材料、例えば金属またはPPS(ポリフェニレンサルファイド)樹脂から形成されている。 The related invention will be described below.
A sealing device according to a related invention of the present invention is connected to a valve box, a valve body having a curved outer surface and rotatably arranged in the valve box to control the flow of fluid, and the valve box. A sealing device that is used in a valve device including a pipe that is a part of the valve box and seals between an inner hole of the pipe and a space outside the valve body and inside the valve box. A center hole that is formed of resin and communicates with the inner hole of the tube and allows fluid to flow, and a curved facing surface that faces the outer surface of the valve body, and a circumferential groove on the facing surface. And a first elastic ring formed of an elastic body and fitted into the circumferential groove of the resin ring and closely attached to the outer surface of the valve body. .
FIG. 12 is a cross-sectional view of the
密封装置1が適用される弁装置は、例えば、内燃機関の冷却水(冷媒)をラジエータに供給する弁装置であってもよいし、油圧機器のオイルを所望の流路に分配する弁装置であってもよいが、他の弁装置であってもよい。弁装置が制御する流体は、冷却水のような冷媒またはオイルであってもよいが、他の流体であってもよい。
The valve device to which the sealing device 1 is applied may be, for example, a valve device that supplies cooling water (refrigerant) of an internal combustion engine to a radiator, or a valve device that distributes oil of hydraulic equipment to a desired flow path. There may be other valve devices. The fluid controlled by the valve device may be a refrigerant or oil such as cooling water, but may be another fluid.
弁体6は、弁箱3内で回転可能であって、その回転に伴って、管4を通過する流体の流量が調節される。図12においては、弁箱3と弁体6の一部のみを示すが、弁体6は球状または円柱状の外面形状を有する。弁体6は、図の矢印に示すように、円弧方向に沿って回転可能である。
The valve body 6 is rotatable in the valve box 3, and the flow rate of the fluid passing through the pipe 4 is adjusted with the rotation. Although only a part of the valve box 3 and the valve body 6 is shown in FIG. 12, the valve body 6 has a spherical or cylindrical outer surface shape. The valve body 6 is rotatable along the arc direction as shown by the arrows in the figure.
弁体6の内部には、流体(例えば、オイル、水、冷媒)が流れる流路空間7が設けられ、流路空間7は、弁体6の壁を貫通する開口部8で開口する。弁体6の回転に伴って、開口部8が管4の内孔5に通ずると、流路空間7から内孔5へ流体が流れることが可能となる。逆に、弁体6の回転に伴って、開口部8が内孔5から離れると、流路空間7と内孔5の間の流路が閉塞させられる。また、開口部8と内孔5の重なりの程度に応じて、流体の流量が調節される。図示の管4は弁箱3の下流に設けられ、弁箱3を通った流体が管4を通過するが、管4は弁箱3の上流に設けられ、管4を通った流体が弁箱3を通過してもよい。
Inside the valve body 6, a flow path space 7 through which a fluid (for example, oil, water, refrigerant) flows is provided, and the flow path space 7 opens at an opening 8 that penetrates the wall of the valve body 6. When the opening 8 passes through the inner hole 5 of the pipe 4 along with the rotation of the valve body 6, the fluid can flow from the flow path space 7 to the inner hole 5. Conversely, when the opening 8 is separated from the inner hole 5 as the valve body 6 rotates, the flow path between the flow path space 7 and the inner hole 5 is blocked. Further, the flow rate of the fluid is adjusted according to the degree of overlap between the opening 8 and the inner hole 5. The illustrated pipe 4 is provided downstream of the valve box 3, and the fluid passing through the valve box 3 passes through the pipe 4. The pipe 4 is provided upstream of the valve box 3, and the fluid passing through the pipe 4 is supplied to the valve box. 3 may be passed.
密封装置1は、管4の内孔5と、弁体6の外側かつ弁箱3の内側の空間35との間を密封して、これらの間の流体の流れを防止するために使用される。密封装置1は、樹脂リング10と、樹脂リング10に支持されて弁体6に向けて押圧させられる第1の弾性体リング(この実施形態ではOリング90)を有する。
The sealing device 1 is used to seal between the inner hole 5 of the tube 4 and the space 35 outside the valve body 6 and inside the valve box 3 to prevent fluid flow therebetween. . The sealing device 1 includes a resin ring 10 and a first elastic ring (O-ring 90 in this embodiment) that is supported by the resin ring 10 and pressed toward the valve body 6.
樹脂リング10は、樹脂によって環状に形成されている。好ましくは、樹脂リング10は摩擦係数が小さい硬質の材料から形成されている。樹脂リング10の好適な材料の例は、ポリテトラフルオロエチレン(PTFE)であるが、他の樹脂であってもよい。
The resin ring 10 is formed in an annular shape with resin. Preferably, the resin ring 10 is formed of a hard material having a small friction coefficient. An example of a suitable material for the resin ring 10 is polytetrafluoroethylene (PTFE), but other resins may be used.
樹脂リング10は、内周面82と、外周面84と、樹脂リング10の中心軸線に垂直な平坦面86と、平坦面86の反対側にあって弁体6の外面に対向する対向面88とを有する。樹脂リング10には、内周面82によって画定された、樹脂リング10の中心軸線に沿って延びる中心孔が形成されている。中心孔は管4の内孔5にほぼ同軸に配列される。したがって、上記の通り、弁体6の回転に伴って、弁体6の開口部8が樹脂リング10の中心孔に重なると、中心孔を介して、流路空間7から管4の内孔5へ流体が流れることが可能となる。
The resin ring 10 includes an inner peripheral surface 82, an outer peripheral surface 84, a flat surface 86 perpendicular to the central axis of the resin ring 10, and a facing surface 88 that is opposite to the flat surface 86 and faces the outer surface of the valve body 6. And have. The resin ring 10 is formed with a central hole defined by the inner peripheral surface 82 and extending along the central axis of the resin ring 10. The central hole is arranged substantially coaxially with the inner hole 5 of the tube 4. Therefore, as described above, when the opening 8 of the valve body 6 overlaps with the center hole of the resin ring 10 as the valve body 6 rotates, the inner hole 5 of the pipe 4 from the flow path space 7 passes through the center hole. The fluid can flow to.
樹脂リング10は、管4の端部に形成された段差部22と弁体6との間に配置される。樹脂リング10の対向面88には、上述したOリング90が支持されている。具体的には、対向面88には、内周面82および外周面84と同心の周溝が形成されており、この周溝にOリング90が嵌め込まれ、Oリング90が弁体6の湾曲した外面に密着させられる。
The resin ring 10 is disposed between the step portion 22 formed at the end of the tube 4 and the valve body 6. The O-ring 90 described above is supported on the facing surface 88 of the resin ring 10. Specifically, a circumferential groove concentric with the inner circumferential surface 82 and the outer circumferential surface 84 is formed in the facing surface 88, and an O-ring 90 is fitted into the circumferential groove, and the O-ring 90 is curved of the valve body 6. To the outside surface.
Oリング90は、樹脂リング10の材料よりも弾性が高い弾性体、例えばエラストマーから形成されたリングである。Oリング90は、その弾性復元力によって弁体6の湾曲した外面に密着させられる。
The O-ring 90 is a ring formed of an elastic body having higher elasticity than the material of the resin ring 10, for example, an elastomer. The O-ring 90 is brought into close contact with the curved outer surface of the valve body 6 by its elastic restoring force.
Oリング90は接着剤によって周溝内に固定されてもよい。あるいは、プラズマ処理および押圧によって、Oリング90を周溝内に固定してもよい。
The O-ring 90 may be fixed in the circumferential groove with an adhesive. Alternatively, the O-ring 90 may be fixed in the circumferential groove by plasma treatment and pressing.
密封装置1は、さらに樹脂リング10の全体を弁体6に向けて押圧する第2の弾性体リング(この実施形態ではOリング91)を有する。但し、Oリング91は必ずしも設けなくてもよい。Oリング91は、樹脂リング10の材料よりも弾性が高い弾性体、例えばエラストマーから形成されたリングである。Oリング91は、樹脂リング10の平坦面86に接触しており、弾性復元力によって樹脂リング10の全体を弁体6に向けて押圧する。
The sealing device 1 further includes a second elastic ring (O-ring 91 in this embodiment) that presses the entire resin ring 10 toward the valve body 6. However, the O-ring 91 is not necessarily provided. The O-ring 91 is a ring formed from an elastic body having a higher elasticity than the material of the resin ring 10, for example, an elastomer. The O-ring 91 is in contact with the flat surface 86 of the resin ring 10 and presses the entire resin ring 10 toward the valve body 6 by an elastic restoring force.
ここでは、管4の端部に形成された段差部22にOリング91を受け入れるための円形溝32が形成されている。円形溝32は内孔5と同心に設けられている。但し、円形溝32は必ずしも設けなくてもよい。
Here, a circular groove 32 for receiving the O-ring 91 is formed in the step portion 22 formed at the end of the tube 4. The circular groove 32 is provided concentrically with the inner hole 5. However, the circular groove 32 is not necessarily provided.
この関連発明に係る弁装置においては、弁体6の外側かつ弁箱3の内側の空間35にも流体が存在しうる。樹脂リング10とOリング91は、協働して、空間35から管4の内孔5への流体の流れ、およびその逆の流れを阻止する。より具体的には、樹脂リング10の外周面84と、その外側の管4の壁部との間に隙間があったとしても、樹脂リング10と管4の端部との間に介在するOリング91が空間35と管4の内孔5との間を遮蔽する。このようにして、Oリング91が樹脂リング10の封止性能を補完する。
In the valve device according to this related invention, fluid can also exist in the space 35 outside the valve body 6 and inside the valve box 3. The resin ring 10 and the O-ring 91 cooperate to prevent the flow of fluid from the space 35 to the inner hole 5 of the tube 4 and vice versa. More specifically, even if there is a gap between the outer peripheral surface 84 of the resin ring 10 and the wall portion of the tube 4 on the outer side, the O interposed between the resin ring 10 and the end portion of the tube 4. A ring 91 shields between the space 35 and the inner hole 5 of the tube 4. In this way, the O-ring 91 supplements the sealing performance of the resin ring 10.
図13は、図12の密封装置の一部拡大断面図である。この関連発明においては、樹脂リング10のうち弁体6の湾曲した外面に対向する対向面88に形成された周溝にOリング90が嵌め込まれ、Oリング90が弁体6の外面に密着させられる。Oリング90は、樹脂リング10より高い弾性を有しており、弁体6の湾曲した外面に対する密着性が高い。したがって、樹脂リング10の湾曲した対向面88を厳密な寸法公差で製造しなくても高い封止性を発揮することができる。Oリング90は軟らかいために弁体6との接触により磨滅しやすいが、Oリング90が磨滅した後でも、樹脂リング10の湾曲した対向面88が弁体6の外面に密着するので、弁体6の外面に対して、少なくともある程度の封止性能を長期にわたって確保することができる。
FIG. 13 is a partially enlarged sectional view of the sealing device of FIG. In this related invention, an O-ring 90 is fitted into a circumferential groove formed in a facing surface 88 of the resin ring 10 facing the curved outer surface of the valve body 6, and the O-ring 90 is brought into close contact with the outer surface of the valve body 6. It is done. The O-ring 90 has higher elasticity than the resin ring 10 and has high adhesion to the curved outer surface of the valve body 6. Therefore, high sealing performance can be exhibited without manufacturing the curved facing surface 88 of the resin ring 10 with strict dimensional tolerances. Since the O-ring 90 is soft, it is easy to be worn away by contact with the valve body 6. However, even after the O-ring 90 is worn away, the curved facing surface 88 of the resin ring 10 is in close contact with the outer surface of the valve body 6. It is possible to ensure at least a certain degree of sealing performance over a long period with respect to the outer surface of 6.
不可欠ではないが、密封装置1は、管4の端部に形成された段差部22に設置されて樹脂リング10の全体を弁体6に向けて押圧する第2のOリング91をさらに備える。したがって、樹脂リング10の全体が弁体6に向けて押圧されるので、第1のOリング90を弁体6の湾曲した外面に強く押圧することが可能である。Oリング90が磨滅した後でも、樹脂リング10の全体が弁体6に向けて押圧されるので、樹脂リング10の湾曲した対向面88が弁体6の外面に密着するようになって、弁体6の外面に対して、少なくともある程度の封止性能を長期にわたって確保することができる。
Although not indispensable, the sealing device 1 further includes a second O-ring 91 that is installed in the stepped portion 22 formed at the end of the tube 4 and presses the entire resin ring 10 toward the valve body 6. Accordingly, since the entire resin ring 10 is pressed toward the valve body 6, it is possible to strongly press the first O-ring 90 against the curved outer surface of the valve body 6. Even after the O-ring 90 is worn out, the entire resin ring 10 is pressed toward the valve body 6, so that the curved facing surface 88 of the resin ring 10 comes into close contact with the outer surface of the valve body 6. At least a certain degree of sealing performance can be secured over a long period of time on the outer surface of the body 6.
不可欠ではないが、この関連発明では円形溝32が管4の端部の段差部22に形成されており、この円形溝32にOリング91が嵌め込まれている。したがって、Oリング91は定位置に固定されており、かつ径方向において外側からも内側からも圧縮されている。このため、Oリング91は、円周方向にわたって一定の樹脂リング10に向かう力を樹脂リング10に与え、樹脂リング10を弁体6の外面に適切に押圧することができる。
Although not essential, in this related invention, the circular groove 32 is formed in the stepped portion 22 at the end of the tube 4, and the O-ring 91 is fitted in the circular groove 32. Therefore, the O-ring 91 is fixed at a fixed position, and is compressed from the outside and the inside in the radial direction. For this reason, the O-ring 91 can apply a force directed to the resin ring 10 in a circumferential direction to the resin ring 10 and appropriately press the resin ring 10 against the outer surface of the valve body 6.
変形例
上記の関連発明においては、単一のOリング90が樹脂リング10の対向面88の周溝に配置されている。しかし、図14に示すように、複数のOリング90が樹脂リング10の対向面88の複数の周溝にそれぞれ配置されてもよい。 Modification In the related invention described above, the single O-ring 90 is arranged in the circumferential groove of the facing surface 88 of the resin ring 10. However, as shown in FIG. 14, the plurality of O-rings 90 may be disposed in the plurality of circumferential grooves on the facing surface 88 of the resin ring 10, respectively.
上記の関連発明においては、単一のOリング90が樹脂リング10の対向面88の周溝に配置されている。しかし、図14に示すように、複数のOリング90が樹脂リング10の対向面88の複数の周溝にそれぞれ配置されてもよい。 Modification In the related invention described above, the single O-
上記の関連発明においては、弾性体リングとしてOリング、すなわちリングに対して垂直な断面の形状が円形であるリングが使用されている。しかしながら、弾性体リングの断面形状が円形である必要は必ずしもなく、他の様々な断面形状の弾性リングを使用してもよい。例えば、断面形状がX字状であるXリング、断面形状がD字状であるDリング、断面形状が三角形であるリングを使用することができる。図15は、Oリング90の代わりにDリング92を使用し、Oリング91の代わりにDリング93を使用した変形例を示す。
In the related invention, an O-ring, that is, a ring having a circular cross section perpendicular to the ring is used as the elastic ring. However, the elastic ring does not necessarily have a circular cross-sectional shape, and other various elastic ring shapes may be used. For example, an X-ring having an X-shaped cross-section, a D-ring having a D-shaped cross-section, and a ring having a triangular cross-section can be used. FIG. 15 shows a modification in which a D ring 92 is used instead of the O ring 90 and a D ring 93 is used instead of the O ring 91.
1,40,60 密封装置
3 弁箱
4 管
5 内孔
6 弁体
7 流路空間
8 開口部
10,41,51,61 樹脂リング
12,42,52 第1の板部分
14,44,54 第2の板部分
16,46,56 連結部分
18,48,58 中心孔
20,50,70 周溝
22 段差部
30,31 Oリング(弾性体リング)
32,64 円形溝
35 空間
55,65 Dリング(弾性体リング)
62 Oリング
82 内周面
84 外周面
86 平坦面
88 対向面
90 Oリング(第1の弾性体リング)
91 Oリング(第2の弾性体リング)
92 Dリング(第1の弾性体リング)
93 Dリング(第2の弾性体リング) 1, 40, 60Sealing device 3 Valve box 4 Tube 5 Inner hole 6 Valve body 7 Flow path space 8 Opening portion 10, 41, 51, 61 Resin ring 12, 42, 52 First plate portion 14, 44, 54 First Two plate portions 16, 46, 56 Connecting portions 18, 48, 58 Center holes 20, 50, 70 Circumferential groove 22 Stepped portions 30, 31 O-ring (elastic body ring)
32, 64Circular groove 35 Space 55, 65 D ring (elastic ring)
62 O-ring 82 Inner peripheral surface 84 Outer peripheral surface 86 Flat surface 88 Opposing surface 90 O-ring (first elastic ring)
91 O-ring (second elastic ring)
92 D-ring (first elastic ring)
93 D-ring (second elastic ring)
3 弁箱
4 管
5 内孔
6 弁体
7 流路空間
8 開口部
10,41,51,61 樹脂リング
12,42,52 第1の板部分
14,44,54 第2の板部分
16,46,56 連結部分
18,48,58 中心孔
20,50,70 周溝
22 段差部
30,31 Oリング(弾性体リング)
32,64 円形溝
35 空間
55,65 Dリング(弾性体リング)
62 Oリング
82 内周面
84 外周面
86 平坦面
88 対向面
90 Oリング(第1の弾性体リング)
91 Oリング(第2の弾性体リング)
92 Dリング(第1の弾性体リング)
93 Dリング(第2の弾性体リング) 1, 40, 60
32, 64
62 O-
91 O-ring (second elastic ring)
92 D-ring (first elastic ring)
93 D-ring (second elastic ring)
Claims (5)
- 弁箱と、湾曲した外面を有し、前記弁箱内に回転可能に配置されて流体の流れを制御する弁体と、前記弁箱に連結されているか前記弁箱の一部である管とを備える弁装置に使用され、前記管の内孔と、前記弁体の外側かつ前記弁箱の内側の空間との間を密封する密封装置であって、
樹脂によって形成され、前記弁体の外面に接触させられ、周溝が形成されている樹脂リングと、
弾性体から形成された、前記樹脂リングの一部又は全体を介して前記弁体を押圧する弾性体リングとを備え、
前記樹脂リングは、
前記内孔に通じており、流体が流動可能な中心孔と、
前記管の端部に形成された前記段差部と前記弁体との間に配置される第1の板部分と、
前記弁体の前記外面に密着させられる第2の板部分と、
前記第1の板部分の一部と前記第2の板部分の一部とを連結する連結部分とを備え、
前記弾性体リングは、前記樹脂リングの前記第1の板部分と前記第2の板部分との間の周溝内又は前記管の端部に形成された段差部に嵌め込まれている、密封装置。 A valve body, a valve body having a curved outer surface and rotatably disposed in the valve box to control a flow of fluid; a pipe connected to the valve box or being a part of the valve box; A sealing device that seals between an inner hole of the tube and a space outside the valve body and inside the valve box,
A resin ring formed of resin, brought into contact with the outer surface of the valve body, and formed with a circumferential groove;
An elastic body ring that is formed from an elastic body and presses the valve body through part or all of the resin ring;
The resin ring is
A central hole that communicates with the inner hole and allows fluid to flow;
A first plate portion disposed between the stepped portion formed at the end of the tube and the valve body;
A second plate portion closely attached to the outer surface of the valve body;
A connecting portion connecting a part of the first plate part and a part of the second plate part;
The elastic body ring is fitted in a step formed in a circumferential groove between the first plate portion and the second plate portion of the resin ring or at an end portion of the tube. . - 前記弾性体リングは、前記管の端部に形成された段差部に設置されて前記樹脂リングの全体を前記弁体に向けて押圧する、請求項1に記載の密封装置。 The sealing device according to claim 1, wherein the elastic ring is installed in a stepped portion formed at an end of the tube and presses the entire resin ring toward the valve body.
- 前記弾性体リングは、前記管の前記段差部に形成された円形溝に嵌め込まれるようになっていることを特徴とする請求項2に記載の密封装置。 The sealing device according to claim 2, wherein the elastic ring is fitted into a circular groove formed in the step portion of the tube.
- 前記弾性体リングは、前記樹脂リングの前記第1の板部分と前記第2の板部分との間の周溝内に嵌め込まれ、前記第2の板部分を前記弁体に向けて押圧し、前記第1の板部分を前記管の端部の前記段差部に向けて押圧する、請求項1に記載の密封装置。 The elastic ring is fitted into a circumferential groove between the first plate portion and the second plate portion of the resin ring, and presses the second plate portion toward the valve body, The sealing device according to claim 1, wherein the first plate portion is pressed toward the step portion at the end of the tube.
- 前記樹脂リングの前記連結部分は、前記第1の板部分の中心孔側の端縁と、前記第2の板部分の中心孔側の端縁とを連結することを特徴とする請求項4に記載の密封装置。 5. The connecting portion of the resin ring connects an end edge on the center hole side of the first plate portion and an end edge on the center hole side of the second plate portion. The sealing device as described.
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CN109538779A (en) * | 2019-01-17 | 2019-03-29 | 广州宝力特密封技术有限公司 | Ball valve combined seal ring and ball valve |
WO2022071196A1 (en) * | 2020-09-30 | 2022-04-07 | Ntn株式会社 | Seal for flow control valve and flow control valve device |
JP7551269B1 (en) | 2023-04-24 | 2024-09-17 | 中外炉工業株式会社 | Coating Equipment |
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JP7084042B2 (en) * | 2019-09-24 | 2022-06-14 | 株式会社東海理機 | Packing and rotary valves |
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JPS5597561A (en) * | 1978-09-20 | 1980-07-24 | Westad Armaturfab | Seal ring of butterfly valve for low temperature fluid |
US5392826A (en) * | 1991-06-14 | 1995-02-28 | Saville; Eric J. | Aircraft waste system drain valve |
JP2007170556A (en) * | 2005-12-22 | 2007-07-05 | Niigata Loading Systems Ltd | Sealing device for eccentric butterfly valve |
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JPS5597561A (en) * | 1978-09-20 | 1980-07-24 | Westad Armaturfab | Seal ring of butterfly valve for low temperature fluid |
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JP2007170556A (en) * | 2005-12-22 | 2007-07-05 | Niigata Loading Systems Ltd | Sealing device for eccentric butterfly valve |
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CN109538779A (en) * | 2019-01-17 | 2019-03-29 | 广州宝力特密封技术有限公司 | Ball valve combined seal ring and ball valve |
WO2022071196A1 (en) * | 2020-09-30 | 2022-04-07 | Ntn株式会社 | Seal for flow control valve and flow control valve device |
JP7551269B1 (en) | 2023-04-24 | 2024-09-17 | 中外炉工業株式会社 | Coating Equipment |
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