WO2022064543A1

WO2022064543A1 - Valve device

Info

Publication number: WO2022064543A1
Application number: PCT/JP2020/035667
Authority: WO
Inventors: 克典高井
Original assignee: 三菱電機株式会社
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2022-03-31
Also published as: JPWO2022064543A1; JP7146149B2

Abstract

A valve device comprising: a housing (11) having a flow path (11a) for flowing an EGR gas therein; a valve (12) supported by the housing (11) so as to be able to reciprocate and opening/closing the flow path (11a); a sealing member (36) provided on the lower side of the flow path (11a) of the housing (11) and brought into close contact with a shaft portion (12b) of the valve (12) so that the shaft portion (12b) and the sealing member are sealed; and a guide member (33) provided on the lower side of the flow path (11a) of the housing (11) and the upper side of the sealing member (36) and gradually inclined downward as the guide member (33) extends from the inner periphery end in close contact with the penetrating shaft portion (12b) toward the outer peripheral end.

Description

Valve device

This disclosure relates to a valve device.

For example, a valve device is used for flow rate control. Such a valve device is disclosed in, for example, Patent Document 1.

Japanese Unexamined Patent Publication No. 2007-303434

The valve device disclosed in Patent Document 1 controls the flow rate of gas flowing through the flow path provided in the lower part of the housing by adjusting the opening degree of a valve that can move directly. .. Therefore, in the valve device disclosed in Patent Document 1, a bearing portion that supports the valve so as to be reciprocally movable in the axial direction is arranged above the flow path. Further, the bearing portion is provided with a seal member (gas seal). This sealing member prevents gas from leaking from the bearing portion into the atmosphere.

Here, some valve devices have a layout structure in which the flow path provided in the upper part of the housing is opened and closed by a directly movable valve. In the valve device having such a layout structure, the bearing portion is arranged below the flow path. Therefore, in the valve device having the above layout structure, the water generated by condensing the water existing in the flow path is transmitted from the flow path through the valve shaft portion by the action of gravity, and the bearing portion. There is a risk of intrusion into the sealing member. As described above, when water enters the sealing member, the sealing member is corroded. As a result, the valve device provided with the layout structure cannot maintain the airtightness in the flow path, and the gas flow rate cannot be appropriately controlled.

The present disclosure has been made in order to solve the above-mentioned problems, and in a layout structure in which the sealing member is arranged below the flow path, it is possible to prevent water from entering the sealing member and to prevent the sealing member from entering the sealing member. It is an object of the present invention to provide a valve device capable of preventing corrosion.

The valve device according to the present disclosure includes a housing having a flow path through which a fluid flows, a valve that is reciprocally supported by the housing and opens and closes the flow path, and a valve shaft portion provided below the flow path in the housing. A sealing member that is in close contact with the shaft portion and seals between the shaft portion, and an inner peripheral end to an outer peripheral end that is provided on the lower side of the flow path in the housing and on the upper side of the sealing member and is in close contact with the shaft portion that penetrates the shaft portion. It is provided with a guide member that gradually inclines downward toward the direction of.

According to the present disclosure, in a layout structure in which the sealing member is arranged below the flow path, it is possible to prevent water from entering the sealing member and prevent corrosion of the sealing member.

It is a vertical sectional view which shows the structure of the valve device which concerns on Embodiment 1. FIG. It is an enlarged view of a bearing part. It is a perspective view which shows the structure of the upper shape holding member. It is a perspective view which shows the structure of the lower shape holding member. It is a figure which shows the assembly state of the upper shape holding member and the lower shape holding member. FIG. 5A is a view seen from the opening side. FIG. 5B is a view seen from the fitting structure side. It is a perspective view which shows the structure of the guide member. FIG. 6A is a diagram showing a normal state of the guide member. FIG. 6B is a diagram showing a state in which the guide member is turned inside out.

Hereinafter, in order to explain the present disclosure in more detail, a mode for carrying out the present disclosure will be described in accordance with the attached drawings.

Embodiment 1.
The valve device according to the first embodiment will be described with reference to FIGS. 1 to 6.

FIG. 1 is a vertical cross-sectional view showing the configuration of the valve device according to the first embodiment. FIG. 2 is an enlarged view of the bearing portion 30. FIG. 3 is a perspective view showing the configuration of the upper shape holding member 34. FIG. 4 is a perspective view showing the configuration of the lower shape holding member 35. FIG. 5 is a diagram showing an assembled state of the upper shape holding member 34 and the lower shape holding member 35. FIG. 6 is a perspective view showing the configuration of the guide member 33.

Here, FIGS. 1 to 6 apply the valve device according to the first embodiment to the EGR valve device provided in the exhaust gas recirculation (hereinafter referred to as EGR) system mounted on the vehicle. An example is shown.

The EGR system uses an exhaust passage for a part of the exhaust gas (hereinafter referred to as EGR gas) for the purpose of reducing harmful substances contained in the exhaust gas discharged from the exhaust gas of the vehicle engine. It is provided with an exhaust gas recirculation passage (hereinafter referred to as an EGR passage) for recirculating (recirculating) from the air to the intake passage. Further, the EGR system is provided with an EGR valve device in the middle of the EGR passage in order to control the flow rate of the EGR gas.

First, the valve device applied to the EGR valve will be described with reference to FIG.

As shown in FIG. 1, the valve device includes a housing 11, a valve 12, a spring 13, a spring connecting member 14, a bush 15, a motor 16, a motor support member 17, a motor side seal member 18, a connector 19, a cover member 20, and a valve device. , The bearing portion 30 is provided.

The housing 11 constitutes the outer shell of the valve device. The housing 11 has a flow path 11a, a valve seat 11b, and a through hole 11c.

The flow path 11a forms a part of the EGR passage. The EGR gas, which is a fluid, flows through the flow path 11a. The arrow G in FIG. 1 indicates the flow of EGR gas. A valve 12, which will be described later, can be seated on the valve seat 11b. The through hole 11c penetrates the housing 11 in the vertical direction. The through hole 11c is a hole through which the shaft portion 12b of the valve 12, which will be described later, penetrates.

The valve 12 is a poppet type EGR control valve. The valve 12 controls the flow rate of the EGR gas flowing through the flow path 11a by adjusting the opening degree with respect to the flow path 11a. Such a valve 12 is supported by the housing 11 via the bush 15 and the bearing portion 30. Therefore, the valve 12 can reciprocate in the axial direction of the valve 12. That is, the valve 12 can move directly.

Specifically, the valve 12 has a valve body 12a and a shaft portion 12b. The valve body 12a has a circular shape and is provided at the upper end of the shaft portion 12b. The valve body 12a can be seated on the valve seat 11b of the flow path 11a. The shaft portion 12b penetrates the through hole 11c of the housing 11. The shaft portion 12b is supported by a bush 15 and a bearing portion 30 provided in the through hole 11c so as to be reciprocally movable in the axial direction of the shaft portion 12b.

That is, the valve body 12a is seated on the valve seat 11b by the shaft portion 12b moving downward. Further, the valve body 12a is separated from the valve seat 11b by the shaft portion 12b moving upward.

Further, the valve 12 is supported by the housing 11 via the spring 13 and the spring connecting member 14. The spring connecting member 14 is provided at the lower end of the shaft portion 12b. The spring 13 is interposed between the housing 11 and the spring connecting member 14. The spring 13 is provided in a compressed state between the housing 11 and the spring connecting member 14. Therefore, the spring 13 always urges the shaft portion 12b downward to press the valve body 12a against the valve seat 11b.

The bush 15 is provided at the upper end of the through hole 11c. The bush 15 together with the bush 31 of the bearing portion 30 described later supports the shaft portion 12b of the valve 12 so as to be reciprocally movable in the axial direction thereof.

The motor 16 has an output shaft 16a. The motor 16 is a linear motor, and is capable of reciprocating the output shaft 16a in the axial direction thereof. Note that FIG. 1 shows a state in which the output shaft 16a is located at the lowest position.

The output shaft 16a is arranged coaxially with the valve 12. The upper end of the output shaft 16a can come into contact with the lower end of the shaft portion 12b. Therefore, the motor 16 can attach and detach the valve body 12a to and from the valve seat 11b by reciprocating the output shaft 16a in the axial direction thereof.

Further, the motor 16 is fixed to the housing 11 via the motor support member 17. The motor support member 17 has a stepped cylindrical shape with a tapered upper end side. The motor 16 is inserted and fixed to the inner peripheral surface of the motor support member 17 from the lower end side thereof. As described above, the motor 16 is inserted into the motor support member 17 fixed to the housing 11, so that the output shaft 16a thereof becomes coaxial with the shaft portion 12b.

The motor side seal member 18 is formed in an annular shape and in a bellows shape. Further, the motor-side seal member 18 is provided between the upper end of the output shaft 16a and the upper end of the motor support member 17, and seals between them. Therefore, the motor-side seal member 18 expands and contracts with the reciprocating movement of the output shaft 16a in the axial direction, and can always prevent water from entering the motor 16 side from the housing 11 side.

The connector 19 is electrically connected to the lower end of the motor 16. The connector 19 supplies the drive power sent from an external power source (not shown) to the motor 16.

The cover member 20 protects the motor 16 and the connector 19. The cover member 20 covers the motor 16 and the connector 19 from their sides. Further, the cover member 20 is supported by the lower end of the motor support member 17. The motor 16 is supported by the motor support member 17 in a state of penetrating the upper plate of the cover member 20.

Therefore, when the drive power is supplied to the motor 16 and the output shaft 16a moves upward, the output shaft 16a directs the shaft portion 12b of the valve 12 upward against the urging force of the spring 13. Press. Along with this, the valve body 12a of the valve 12 separates from the valve seat 11b and opens the flow path 11a. Therefore, the exhaust passage and the intake passage side communicate with each other via the EGR passage including the flow path 11a. As a result, the EGR gas returns from the exhaust passage to the intake passage. At this time, the flow rate of the EGR gas is controlled according to the lift amount (valve opening degree) from the valve seat 11b of the valve body 12a.

Further, when the driving power is supplied to the motor 16 and the output shaft 16a moves downward, the pressing force from the output shaft 16a is released from the shaft portion 12b of the valve 12, so that the urging force of the spring 13 is released. Moves downwards. Along with this, the valve body 12a of the valve 12 sits on the valve seat 11b and closes the flow path 11a. Therefore, the space between the exhaust passage and the intake passage is cut off. As a result, the EGR gas does not return from the exhaust passage to the intake passage.

When the engine is driven, the motor 16 is supplied with driving power and opens and closes the valve 12 as needed. Further, the motor 16 immediately closes the valve 12 when the engine is stopped. Further, the motor 16 keeps the valve 12 closed while the engine is stopped.

Next, the bearing portion 30 will be described in detail with reference to FIGS. 1 to 6. The arrows W in FIGS. 2 and 6 indicate the flow of condensed water. Further, the arrow WV in FIG. 2 indicates the flow of water vapor in which the condensed water is vaporized.

Here, the condensed water is, for example, when the EGR gas flowing through the EGR passage is cooled by using a cooler (not shown) or the like, or when the engine is stopped, the EGR gas remaining in the EGR passage naturally becomes. When cooled, it is water produced by the condensation of water contained in EGR gas. If such condensed water drops from the flow path 11a between the through hole 11c and the shaft portion 12b and enters the bearing portion 30 described later, the bearing portion 30 may be corroded. ..

As shown in FIGS. 1 and 2, the bearing portion 30 is provided in the housing 11 below the flow path 11a. The bearing portion 30 includes a bush 31, an O-ring 32, a guide member 33, an upper shape holding member 34, a lower shape holding member 35, a seal member 36, and a holding member 37. The bush 31, O-ring 32, upper shape holding member 34, guide member 33, lower shape holding member 35, seal member 36, and holding member 37 are arranged in order from above to below.

The bush 31 is inserted into the housing 11. The bush 31 is pressed into the housing 11 by, for example, the reaction force of the O-ring. Further, the bush 31 supports the shaft portion 12b of the valve 12 so as to be reciprocally movable in the axial direction thereof.

As shown in FIGS. 2 and 6A, the guide member 33 is provided below the flow path 11a in the housing 11 and above the seal member 36 described later. Further, the guide member 33 is formed so as to gradually incline downward from the inner peripheral end to the outer peripheral end. Therefore, the guide member 33 guides the condensed water that has entered between the through hole 11c and the shaft portion 12b from the flow path 11a toward the radial outer side of the bearing portion 30.

The guide member 33 is made of, for example, a fluororesin material, and has a central hole 33a, an upward inclined surface 33b, and a downward inclined surface 33c.

The central hole 33a forms the inner peripheral end. The shaft portion 12b of the valve 12 penetrates through the central hole 33a. At this time, the entire circumference of the central hole 33a is slidably in contact with the outer peripheral surface of the shaft portion 12b. Therefore, the entire circumference of the central hole 33a is always in close contact with the outer peripheral surface of the shaft portion 12b even if the shaft portion 12b reciprocates in the axial direction. Therefore, the condensed water dropped from the flow path 11a between the through hole 11c and the shaft portion 12b does not enter between the entire circumference of the central hole 33a and the outer peripheral surface of the shaft portion 12b, and the upward inclined surface described later. It flows onto 33b.

The upper inclined surface 33b constitutes the upper surface of the guide member 33. The upper inclined surface 33b is gradually inclined downward in the guide member 33 from the inner peripheral end to the outer peripheral end. Therefore, the upper inclined surface 33b can guide the condensed water that has flowed in toward the radial outer side of the bearing portion 30.

The downward inclined surface 33c constitutes the lower surface of the guide member 33. The downward inclined surface 33c is gradually inclined downward in the guide member 33 from the inner peripheral end to the outer peripheral end.

As shown in FIGS. 2 and 3, the upper shape holding member 34 is provided on the upper side of the guide member 33 in the housing 11. The upper shape holding member 34 faces the upper inclined surface 33b of the guide member 33. That is, the upper shape holding member 34 is fixed to the housing 11 so as to cover the guide member 33 from above. Further, the upper shape holding member 34 has an annular shape. Therefore, even if the shaft portion 12b reciprocates in the axial direction, the upper shape holding member 34 retains the shape of the guide member 33 that is in close contact with the shaft portion 12b, and the guide member 33 is greatly deformed. It can be suppressed.

Such an upper shape holding member 34 is made of, for example, a metal material, and has a central hole 34a, a lower inclined surface 34b, an opening 34c, and a fitting protrusion 34d.

The shaft portion 12b of the valve 12 penetrates the central hole 34a.

The downward inclined surface 34b is a surface facing downward of the upper shape holding member 34. The downward inclined surface 34b is gradually inclined downward from the central hole 34a toward the outer side in the radial direction. Further, the lower inclined surface 34b faces the upper inclined surface 33b of the guide member 33 in the vertical direction. Therefore, the lower inclined surface 34b can suppress the deformation of the upper inclined surface 33b even if the shaft portion 12b reciprocates in the axial direction thereof. Further, the lower inclined surface 34b can guide the condensed water to the radial outer side of the bearing portion 30 with the upper inclined surface 33b.

The opening 34c is open on the outer peripheral surface of the upper shape holding member 34. The opening 34c communicates with the central hole 34a and the downward inclined surface 34b. Therefore, the upper shape holding member 34 guides the condensed water that has entered between the through hole 11c and the shaft portion 12b from the flow path 11a toward the opening 34c through the central hole 34a and the downward inclined surface 34b. can do.

The fitting protrusion 34d is provided at the lower end of the upper shape holding member 34. The fitting protrusion 34d projects downward from the lower end thereof.

As shown in FIGS. 2 and 4, the lower shape holding member 35 is provided on the lower side of the guide member 33 in the housing 11. The lower shape holding member 35 supports the lower inclined surface 33c of the guide member 33. That is, the lower shape holding member 35 is fixed to the housing 11 so as to support the guide member 33. Further, the lower shape holding member 35 has an annular shape. Therefore, even if the shaft portion 12b reciprocates in the axial direction, the lower shape holding member 35 retains the shape of the guide member 33 that is in close contact with the shaft portion 12b, and the guide member 33 is greatly deformed. It can be suppressed.

Such a lower shape holding member 35 is made of, for example, a metal material, and has a center hole 35a, an upper inclined surface 35b, a plurality of grooves 35c, an opening 35d, and a fitting recess 35e. ..

The shaft portion 12b of the valve 12 penetrates the central hole 35a.

The upper inclined surface 35b is a surface facing upward of the lower shape holding member 35 and constitutes a support surface. The upper inclined surface 35b is gradually inclined downward from the central hole 35a toward the outer side in the radial direction. Further, the upper inclined surface 35b supports the lower inclined surface 33c of the guide member 33 from below. Therefore, the upper inclined surface 35b can suppress the deformation of the lower inclined surface 33c even if the shaft portion 12b reciprocates in the axial direction.

The plurality of grooves 35c are provided on the upper inclined surface 35b. Each groove 35c extends in the radial direction of the lower shape holding member 35. Further, each groove 35c extends outward in the radial direction from the outer peripheral end of the guide member 33 supported by the upper inclined surface 35b.

Here, the EGR gas flowing through the flow path 11a enters between the through hole 11c and the shaft portion 12b from the flow path 11a, and then further enters the upper inclined surface 33b side of the guide member 33. At this time, the lower shape holding member 35 uses the groove 35c to pass the EGR gas that has entered the upper inclined surface 33b side of the guide member 33 to the lower inclined surface 33c via the outer peripheral end of the guide member 33. You can wrap it around to the side. Therefore, the lower shape holding member 35 applies a gas pressure having the same magnitude as the gas pressure acting on the upper inclined surface 33b to the lower inclined surface 33c, and the gas pressure from both sides in the vertical direction acting on the guide member 33. To offset. As a result, the valve device suppresses the guide member 33 from being strongly pressed against the lower shape holding member 35 by the gas pressure acting on the upper inclined surface 33b, and wears the shaft portion 12b at the inner peripheral end of the guide member 33. Can be prevented.

The opening 35d is open on the outer peripheral surface of the lower shape holding member 35. The opening 35d communicates with the upper inclined surface 35b. Therefore, the lower shape holding member 35 can guide the condensed water guided by the upper inclined surface 33b of the guide member 33 toward the opening 35d.

The fitting recess 35e is provided at the upper end of the lower shape holding member 35. The fitting recess 35e is recessed downward from the upper end thereof. Further, the fitting recess 35e can be fitted with the fitting protrusion 34d of the upper shape holding member 34.

As shown in FIG. 5, when the fitting protrusion 34d and the fitting recess 35e are fitted, the opening 34c and the opening 35d are positioned at the same position in the circumferential direction of the bearing portion 30. Therefore, the opening 34c and the opening 35d match in the vertical direction to form one large opening. Note that FIG. 5 shows only the assembly of the upper shape holding member 34 and the lower shape holding member 35, and does not show the guide member 33 interposed between them.

The seal member 36 is provided on the lower side of the flow path 11a in the housing 11. Further, the seal member 36 has a cylindrical shape. The outer peripheral surface of the seal member 36 is fixed to the inner peripheral surface of the lower shape holding member 35. On the other hand, the inner peripheral surface of the seal member 36 is in close contact with the outer peripheral surface of the shaft portion 12b to seal between the inner peripheral surface and the outer peripheral surface. Therefore, the seal member 36 can prevent the EGR gas that has entered between the through hole 11c and the shaft portion 12b from the flow path 11a from leaking from the bearing portion 30.

The holding member 37 is fixed to the housing 11. The pressing member 37 supports the lower shape holding member 35 and the sealing member 36 from below.

That is, the valve device is provided with the guide member 33 between the flow path 11a and the seal member 36, so that the condensed water is discharged above the seal member 36 toward the radial outer side of the bearing portion 30. Therefore, the valve device can prevent the sealing member 36 from being corroded.

At this time, as shown in FIG. 6A, in the valve device, the guide member 33 is sandwiched between the upper shape holding member 34 and the lower shape holding member 35, so that the shaft portion 12b of the valve 12 reciprocates in the axial direction thereof. Even in this case, the shape of the guide member 33 can be maintained. Therefore, the valve device can guide the condensed water by the guide member 33.

On the other hand, as shown in FIG. 6B, in the valve device not provided with the upper shape holding member 34 and the lower shape holding member 35, the guide member 33 is not pressed from both sides in the vertical direction, so that the shaft portion 12b reciprocates. If you move it, you may turn it over. When the guide member 33 is turned inside out in this way, the guide member 33 receives gas pressure and water pressure in the direction in which the inner peripheral end thereof is separated from the shaft portion 12b. Therefore, in the valve device not provided with the upper shape holding member 34 and the lower shape holding member 35, a gap is generated between the inner peripheral end of the guide member 33 and the outer peripheral surface of the shaft portion 12b, so that the condensed water is condensed. Without being guided by the guide member 33, it passes through the gap and penetrates into the seal member 36.

As shown in FIG. 6A, the normal state of the guide member 33 is a state in which the outer peripheral end is located below the inner peripheral end (center hole 33a). Further, as shown in FIG. 6B, the inside-out state of the guide member 33 is a state in which the outer peripheral end is located above the inner peripheral end.

On the other hand, as shown in FIGS. 1 and 2, the housing 11 has a water reservoir portion 11d and a drainage passage 11e.

The water reservoir 11d is a space for storing water. The water reservoir 11d is arranged on the radial outer side of the upper shape holding member 34 and the lower shape holding member 35, and has an opening (not shown) communicating with the

openings

34c and 35d thereof. Therefore, the water reservoir portion 11d can take in the condensed water discharged from the

openings

34c and 35d of the bearing portion 30 and store the condensed water inside thereof.

The drainage passage 11e communicates between the flow path 11a and the water reservoir 11d. Therefore, the drainage passage 11e can release the steam vaporized by the condensed water accumulated in the water reservoir 11d into the passage 11a. The condensed water becomes steam when the valve device is warmed by, for example, the heat generated by the engine. Note that FIG. 1 is not an example showing a configuration in which the drainage passage 11e directly communicates with the flow path 11a, but an example showing a configuration in which the drainage passage 11e communicates with the flow path 11a via the through hole 11c. Is.

As described above, the valve device according to the first embodiment has a housing 11 having a flow path 11a through which EGR gas flows, a valve 12 that is reciprocally supported by the housing 11 and opens and closes the flow path 11a, and a flow path in the housing 11. A seal member 36 provided on the lower side of 11a, which is in close contact with the shaft portion 12b of the valve 12 and seals between the shaft portion 12b, and a seal member 36 below the flow path 11a in the housing 11. The guide member 33 is provided on the upper side of the housing and gradually inclines downward from the inner peripheral end to the outer peripheral end in close contact with the shaft portion 12b penetrating the shaft portion 12. Therefore, the valve device can prevent water from entering the seal member 36 and prevent corrosion of the seal member 36 in the layout structure in which the seal member 36 is arranged below the flow path 11a.

The valve device is provided on the lower side of the guide member 33 in the housing 11 and includes a lower shape holding member 35 that supports the lower inclined surface 33c of the guide member 33. Therefore, even if the shaft portion 12b reciprocates in the axial direction, the valve device maintains the shape of the guide member 33 that is in close contact with the shaft portion 12b and suppresses a large deformation of the guide member 33. Can be done.

The lower shape holding member 35 is provided on the upper inclined surface 35b that supports the lower inclined surface 33c of the guide member 33 and the upper inclined surface 35b, and is radially outward from the guide member 33 supported by the upper inclined surface 35b. It has a groove 35c extending toward it. Therefore, the valve device suppresses the guide member 33 from being strongly pressed against the lower shape holding member 35 by the gas pressure acting on the upper inclined surface 33b, and wears the shaft portion 12b at the inner peripheral end of the guide member 33. Can be prevented.

The valve device is provided on the upper side of the guide member 33 in the housing 11 and includes an upper shape holding member 34 facing the upper inclined surface 33b of the guide member 33. Therefore, even if the shaft portion 12b reciprocates in the axial direction, the valve device maintains the shape of the guide member 33 that is in close contact with the shaft portion 12b and suppresses a large deformation of the guide member 33. Can be done.

The valve device is provided in the housing 11 and includes a water reservoir 11d that takes in and stores condensed water flowing through the upper inclined surface 33b of the guide member 33. Therefore, the valve device can temporarily store the condensed water discharged from the

openings

34c and 35d of the bearing portion 30.

The valve device includes a drainage passage 11e that communicates between the flow path 11a and the water reservoir 11d. Therefore, the valve device can return the condensed water accumulated in the water reservoir 11d to the flow path 11a from the water reservoir 11d.

In this disclosure, it is possible to modify any component of the embodiment or omit any component of the embodiment within the scope of the disclosure.

The valve device according to the present disclosure is a valve device or the like capable of preventing water from entering the seal member and preventing corrosion of the seal member by providing a guide member between the flow path and the seal member. Suitable for use.

11 housing, 11a flow path, 11b valve seat, 11c through hole, 11d water reservoir, 11e drain passage, 12 valve, 12a valve body, 12b shaft part, 13 spring, 14 spring connecting member, 15 bush, 16 motor, 16a output shaft, 17 motor support member, 18 motor side seal member, 19 connector, 20 cover member, 30 bearing part, 31 bush, 32 O-ring, 33 guide member, 33a center hole, 33b upward inclined surface, 33c downward inclined surface , 34 upper shape holding member, 34a center hole, 34b lower inclined surface, 34c opening, 34d fitting protrusion, 35 lower shape holding member, 35a central hole, 35b upper inclined surface, 35c groove, 35d opening, 35e fitting Recess, 36 seal member, 37 holding member.

Claims

A housing with a flow path through which fluid flows,
A valve that is reciprocally supported by the housing and opens and closes the flow path,
A sealing member provided on the lower side of the flow path in the housing, which is in close contact with the shaft portion of the valve and seals between the shaft portion and the shaft portion.
A guide member provided on the lower side of the flow path in the housing and on the upper side of the seal member, and gradually inclined downward from the inner peripheral end to the outer peripheral end in close contact with the shaft portion penetrating the shaft portion. A valve device characterized by being equipped with.
The valve device according to claim 1, further comprising a lower shape holding member provided on the lower side of the guide member in the housing and supporting a lower inclined surface of the guide member.
The lower shape holding member is
A support surface that supports the lower inclined surface of the guide member and
The valve device according to claim 2, further comprising a groove provided on the support surface and extending radially outward from the guide member supported on the support surface.
The valve device according to claim 1, further comprising an upper shape holding member provided on the upper side of the guide member in the housing and facing the upper inclined surface of the guide member.
The valve device according to claim 1, further comprising a water reservoir portion provided in the housing and for taking in and storing water flowing on an upper inclined surface of the guide member.
The valve device according to claim 5, further comprising a drainage passage that communicates between the flow path and the water reservoir portion.