JP5766410B2 - Core fitting device and method for fitting the same - Google Patents

Description

  The present invention is a case in which the outer periphery of a fluid pipe is sealed and connected to a perforation formed in a fluid pipe, and is attached to a non-raising rotary screw in the case. The present invention relates to a core fitting device including an operating body to be operated, a substantially cylindrical core that is detachably attached to the operating body and is fitted in a perforation, and a fitting method thereof.

  A conventional core fitting device has a perforation formed in a pipe wall in a case where the outer periphery of a fluid pipe is sealed, and an attachment means connected to the case is disposed. The core to be formed is fitted into the perforation by expanding the diameter (for example, see Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-68920 (page 10, FIG. 7)

  However, in Patent Document 1, there is a problem that when the core is expanded to fit the core into the perforation, for example, a special configuration such as a bush for expanding the core needs to be used. .

  The present invention has been made paying attention to such problems, and a core fitting device capable of easily fitting a core into a perforation without requiring a special configuration for expanding the diameter of the core, and It aims at providing the fitting method.

In order to solve the above problems, the core fitting device of the present invention is:
A case that is connected to a perforation formed in the fluid pipe and that has an outer periphery of the fluid pipe covered in a hermetically sealed manner, and is attached to a non-raising rotary screw in the case, and the rotation screw rotates toward the perforation. A core fitting device comprising: an operating body that is operated in a state in which rotation is restricted ; and a substantially cylindrical core that is removably attached to the operating body and is fitted into the perforation,
The tip portion of the core disposed inside the fluid pipe is formed in a flange portion having a curved tip surface having substantially the same curvature as the inner peripheral surface of the fluid pipe so as to follow the curved shape of the perforation. and has the core which is attached to the outer peripheral surface of the front SL operating body is inserted into the flange portion in the borehole while shrink-deformed with the tip, the collar portion is the fluid tube which has passed through the perforations The core is fitted into the perforation when the operating body is separated from the perforation by being elastically restored inside and engaging with the inner peripheral surface of the fluid pipe. It is characterized in that it is removed from the operating body as it is.
According to this feature, the tip of the core inserted into the perforation is formed on the collar portion having a curved end surface having the same curvature as the inner peripheral surface of the fluid pipe so as to follow the curved shape of the perforation. When the flange part of the part is reduced in diameter, the core is easily deformed, and the core can be easily inserted into the perforation. The collar part that has passed through the perforation is elastically restored inside the fluid pipe, and the inner peripheral surface of the fluid pipe The core can be easily fitted and separated with respect to the perforation without requiring special means such as engaging the core and expanding the diameter of the core.

The core fitting device of the present invention is
The core includes an anticorrosion member that abuts over substantially the entire inner peripheral surface of the perforation.
According to this feature, the anticorrosion member of the core can be surely prevented by making the core anticorrosive member abut over substantially the entire inner peripheral surface of the perforation.

The core fitting device of the present invention is
The core includes a rear end portion having a diameter larger than that of the perforations.
According to this feature, excessive insertion of the core can be prevented by bringing the rear end of the core into contact with the outer surface of the fluid pipe near the perforation.

The core fitting device of the present invention is
Flow path blocking or openable valve body before Symbol fluid tube, it is characterized in that it is attachable to the rotating screw or case.
According to this feature, since the configuration other than the operating body and the valve body is shared between the fitting of the core in the perforation and the shutoff or opening of the fluid pipe flow path, the fluid pipe flow path is shut off or opened. Can be performed at low cost without using a separate configuration.

The core fitting method of the present invention is
A case that is connected to a perforation formed in the fluid pipe and that has an outer periphery of the fluid pipe covered in a hermetically sealed manner, and is attached to a non-raising rotary screw in the case, and the rotation screw rotates toward the perforation. A core fitting method using an operating body that is operated in a state where rotation is restricted , and a substantially cylindrical core that is removably attached to the operating body and is fitted into the perforation,
The tip portion of the core disposed inside the fluid pipe is formed in a flange portion having a curved tip surface having substantially the same curvature as the inner peripheral surface of the fluid pipe so as to follow the curved shape of the perforation. and has the core which is attached to the outer peripheral surface of the front SL operating body is inserted into the flange portion in the borehole while shrink-deformed with the tip, the collar portion is the fluid tube which has passed through the perforations The core is fitted into the perforation when the operating body is separated from the perforation by being elastically restored inside and engaging with the inner peripheral surface of the fluid pipe. It is characterized in that it is removed from the operating body as it is.
According to this feature, the tip of the core inserted into the perforation is formed on the collar portion having a curved end surface having the same curvature as the inner peripheral surface of the fluid pipe so as to follow the curved shape of the perforation. When the flange part of the part is reduced in diameter, the core is easily deformed, and the core can be easily inserted into the perforation. The collar part that has passed through the perforation is elastically restored inside the fluid pipe, and the inner peripheral surface of the fluid pipe The core can be easily fitted to the perforation without requiring any special means such as engaging the core and expanding the diameter of the core. In addition, after the core is fitted to the perforation, when the operating body is separated from the perforation, the hook is locked to the inner surface of the fluid pipe near the perforation so that the core can be fitted to the perforation. Only the operating body can be reliably separated from the perforation while being maintained.

It is a partial cross section figure which shows the state which has drilled the fluid pipe | tube which inserts the core in an Example. It is a front view of the partial cross section which shows the state which attached the core to the operation body. It is a side view of a partial cross section like FIG. (A) is a side view of a partial cross section of the core, (b) is a front view of a partial cross section of the core, and (c) is a plan view of the core. It is a front view of the partial cross section which shows the state which attached the handle | steering-wheel to the rotation operation part. It is a front view of the partial cross section which shows the state by which the operation body was inserted in the piercing | piercing. It is side surface sectional drawing similarly to FIG. It is a front view of the partial cross section which shows the state from which the operating body was spaced apart from the piercing | piercing. It is a front view of the partial cross section which shows the state by which a valve lid is pulled up. It is a front view of the partial cross section which shows the state to which the valve body was attached instead of the operation body. It is a side view of the partial cross section which shows the state which has arrange | positioned the valve lid to which the valve body was attached to the branch pipe.

  EMBODIMENT OF THE INVENTION The form for implementing the core fitting apparatus which concerns on this invention, and its fitting method is demonstrated below based on an Example.

  The core fitting device and the fitting method according to the embodiment will be described with reference to FIGS. As shown in FIGS. 2 and 3, the core fitting device 10 of the present invention mainly communicates with the perforation Q formed in the upper part of the fluid pipe 1 through which the clean water flows, and the outer periphery of the fluid pipe 1 is watertight. , A case 2 that moves up and down in the case 2 by the rotation of the rotating screw 4, that is, an operating body 5 that is attached and operated in the axial direction of the rotating screw 4, and is fitted in the perforation Q as described later. And a substantially cylindrical core 40 into which the operation body 5 can be inserted.

  The fluid pipe 1 of the present embodiment is made of a metal pipe formed in a substantially circular shape in cross section, and the inner peripheral surface is covered with a mortar layer. The inner peripheral surface of the fluid pipe 1 is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. Further, in the present embodiment, the fluid in the fluid pipe 1 is clean water, but the fluid flowing in the fluid pipe is not necessarily limited to clean water, and may be industrial water, for example, or a gas or gas-liquid mixture It may be a fluid pipe through which a fluid in a state flows.

  The case 2 fixedly attached to the outer peripheral surface of the fluid pipe 1 is a so-called split T-shaped pipe, and includes a branch pipe 12 and a valve lid 3 having an inner space in the vertical direction substantially orthogonal to the pipe axis of the fluid pipe 1. And a cover 11 covering the lower side of the outer periphery of the fluid pipe 1.

  As shown in FIG. 1, first, the branch pipe 12 and the cover 11 are opposed to each other at a position sandwiching the fluid pipe 1 and fastened by a plurality of bolts and nuts 13 arranged along the longitudinal direction of the fluid pipe 1. Here, a rubber ring 22 along the outer periphery of the perforation Q is interposed between the inner surface of the branch pipe 12 and the outer surface of the fluid pipe 1 so that overflow from the inside of the fluid pipe 1 does not occur due to drilling described later. ing. Then, after attaching the cover 11 and the branch pipe 12 to the fluid pipe 1, water pressure is applied to the branch pipe 12 to appropriately confirm the water tightness of the gap between the outer surface of the fluid pipe 1 and the inner face of the branch pipe 12. Also good.

  Next, a casing 35 having a work valve 36 disposed therein is connected to the upper flange 12a of the branch pipe 12 in a watertight manner, and an upper end (not shown) of the punching device 50 is connected to the upper end of the casing 35 in a watertight manner. Connecting.

  The perforating apparatus 50 is connected to a driving means (not shown) and extends in the axial direction in the branch pipe 12 toward the fluid pipe 1 and rotates around the axis, and a fluid pipe fixed to the tip of the shaft member 51. The cutter member 52 is provided with a perforating blade 52a for perforating 1 and the cutter member 52 is approached to the outer surface of the fluid pipe 1 to perforate the outer wall. To drill.

  2 and 3, after the piercing device 50 has drilled the piercing hole Q, the piercing device 50 is lifted upward and placed in the housing 35, and then the work valve 36 is operated to operate the branch pipe 12. Stop water. Then, the punching device 50 is removed from the upper end portion of the housing 35, and the outer cover 70 is connected to the upper end portion of the housing 35 in a watertight manner. The outer cover 70 is provided with a pair of openings 71, 71 facing sideways, and these openings 71, 71 are watertightly closed by lid bodies 72, 72 and bolts / nuts 73.

  An arm 74 is attached to an upper end portion (not shown) of the outer cover 70 so as to be movable up and down. At the lower end of the arm 74, an operating body 5 for fitting the core 40 into the perforation Q and a core 40 that is detachably attached to the outer peripheral surface of the operating body 5 in advance are disposed inside. The valve lid 3 is connected via an intermediate member 75, and the valve lid 3 is disposed in the outer cover 70 when the arm 74 is attached to the upper end portion of the outer cover 70. The arm 74 and the upper end portion are watertightly held by a rubber body (not shown). Further, the intermediate member 75 is formed in a cylindrical shape, and a rotation operation portion 4a described later is inserted and disposed therein.

  After the outer cover 70 is connected to the upper end of the housing 35 in a watertight manner, the branch pipe 12 and the outer cover 70 are connected by a communication member such as a hose or a bypass pipe (not shown) having an on-off valve. Then, an air valve (not shown) provided at the upper end portion of the outer cover 70 is opened, and the working valve 36 is operated to open the branch pipe 12, thereby allowing the fluid pipe 1 to pass through the outer case 70 and the branch pipe 12. Fill with water that was flowing inside.

  After the inside of the outer case 70 and the inside of the branch pipe 12 are filled with clean water, the air valve is closed, the on-off valve is opened, the branch pipe 12 and the outer cover 70 are communicated, and the valve lid 3 is removed. The valve lid 3 is assembled in a sealed manner to the upper flange 12a of the branch pipe 12 by being pressed in a non-continuous water state by a pressing means (not shown) attached to the cover 70 in advance.

  At this time, the inside of the branch pipe 12 and the inside of the outer cover 70 are filled with the clean water flowing in the fluid pipe 1 and have the same water pressure. Therefore, when the valve lid 3 is assembled to the upper flange 12a, The drag received by the valve lid 3 from the flowing water can be kept small.

  After the valve lid 3 is assembled to the upper flange 12a, as shown in FIG. 5, the lid bodies 72 and 72 are removed again, the intermediate member 75 is removed from the valve lid 3 through the openings 71 and 71, and the rotational operation is performed. A handle 76 is attached to the portion 4a.

  The valve lid 3 has an outer diameter smaller than the inner diameter of the branch pipe 12, and is watertight along the inner peripheral surface of the branch pipe 12 by an O-ring 19 provided along the outer periphery of the lower portion of the valve lid 3. Is inserted. Further, the position of the valve lid 3 is fixed by screwing a fixing bolt 16 so that the valve lid 3 is fixed. The fixing bolt 16 is screwed into the valve lid 3 to regulate the valve lid 3 in the vertical direction.

  The rotating screw 4 is rotatably attached to an insertion hole 32 formed in the top of the valve lid 3 and has an upper end projecting outside the valve lid 3 (see FIG. 11). The holding plate 33 is fixed to the upper end surface of the valve lid 3 with a bolt 34 to prevent the rotation screw 4 from being pulled out (see FIG. 11). With the above configuration, the rotating screw 4 is rotatable in both forward and reverse directions with respect to the case 2 but does not move up and down. Reference numeral 4b denotes a screw portion having a circumferential surface screwed over substantially the entire length except for the upper end portion of the rotary screw 4.

  As shown in FIG. 5, the screw top 25 is fitted in a guide groove 21 formed in the upper end portion of the operation body 5 described later, and is screwed into the screw portion 4 b, and the upper end portion of the rotary screw 4. By rotating the screw portion 4b according to the rotation of the rotation operation portion 4a formed in the above, the operation body 5 can move up and down following the screw top 25 screwed along the screw portion 4b.

  As shown in FIGS. 2 and 3, the operating body 5 includes a rubber body 7 made of an elastic material having a diameter that can be inserted into the perforation Q. The operation body 5 is formed with an insertion hole 31 into which the screw portion 4b of the rotary screw 4 is inserted. Further, as shown in FIG. 7, a constricted portion 7a is formed in the circumferential direction on the outer surface of the rubber body 7, and the core 40 is attached to the constricted portion 7a by engaging with the core 40. In the downward movement of the body 5, the operation body 5 is not detached.

  Further, as shown in FIG. 3, overhanging portions 8, 8 extending in the vertical direction are provided on the inner surface of the valve lid 3 or the branch pipe 12 constituting the case 2 on the outer surface of the operation body 5 on the upstream and downstream sides. It is extended in the up-down direction so that sliding contact is possible along the groove part 3a. The overhang portions 8, 8 configured as described above are in contact with the groove portion 3 a, so that the rotation of the operating body 5 accompanying the rotation of the rotary screw 4 can be restricted.

  Next, as shown in FIGS. 4A to 4C, the core 40 of this embodiment is used to prevent corrosion of the perforations Q formed by perforating the tube wall of the fluid tube 1. More specifically, the core 40 is composed of a cylindrical body 41 having a substantially circular peripheral wall in plan view and having an inner through-hole formed therein, and an anticorrosion member 42 disposed on the outer peripheral surface of the cylindrical body 41. The tip of the core 40 is formed in a curved shape in the circumferential direction so as to follow the shape of the inner peripheral surface of the perforation Q drilled in the radial direction in the fluid pipe 1 having a substantially circular shape in cross section. The cylindrical body 41 is made of a resin material such as polyethylene that is relatively hard and has elasticity that can be deformed in the direction of diameter reduction. The cylindrical body 41 has the same or different kind of the cylindrical body 41 on the outer peripheral surface thereof. In addition, the anticorrosion member 42 made of a resin material that is softer and more elastic than the cylindrical body 41 is bonded by an adhesive (not shown). The anticorrosion member 42 may be thermally welded to the outer peripheral surface of the cylindrical body 41, for example.

  More specifically, the cylindrical body 41 is formed so as to protrude in the outer diameter direction from the perforation Q in a natural state, and passes through the perforation Q by being deformed in a reduced diameter so as to be disposed inside the fluid pipe 1. And a barrel portion 41c extending continuously from the tip portion 41b, and a rear end portion 41d continuing to the barrel portion 41c and bulging to a larger diameter than the perforations Q. The distal end portion 41 b has a curved distal end surface having substantially the same curvature as the inner peripheral surface of the fluid tube 1 so as to follow the curved surface shape of the perforation Q formed in the fluid tube 1. Further, as shown in FIG. 4A, a portion disposed in the vicinity including the top of the fluid pipe 1 in the tip portion 41b is formed in the flange portion 41a protruding in the outer diameter direction from the perforation Q. Yes.

  The anticorrosion member 42 bonded over the outer peripheral surface of the body portion 41c has a larger diameter than the perforations Q in its natural state and is softer than the cylindrical body 41, so that it is more easily elastically deformed. ing.

  In the core fitting apparatus 10 having the above configuration, attachment of the core 40 to the perforation Q will be described. As shown in FIGS. 2 and 3, the operating body 5 having the core 40 detachably attached to the outer peripheral surface is provided with a handle 76 after the perforation device 50 has perforated Q in the fluid pipe 1 as shown in FIG. The core 40 attached to the outer peripheral surface of the operating body 5 is moved downward with the core 40 by the rotation of the non-lifting rotary screw 4 generated by the horizontal rotation of the operation body 5, so that the collar portion of the distal end portion 41 b 41a is inserted into the perforation Q while being reduced in diameter.

  As shown in FIGS. 5 and 6, the rubber body 7 of the operation body 5 is inserted into the perforation Q, and the core 40 is elastically restored in the inside of the fluid pipe 1 by the flange portion 41 a that has passed through the perforation Q. By engaging with the inner peripheral surface of the fluid pipe 1, the perforation Q is fitted. When the core 40 is fitted in the perforation Q, the anticorrosion member 42 contacts the inner peripheral surface of the perforation Q where the metal base of the fluid pipe 1 is exposed, thereby preventing the perforation Q from being corroded. In this state, the rear end portion 41d of the core 40 abuts on the outer peripheral surface of the fluid pipe 1 in the vicinity of the perforation Q. Even in the state where the core 40 is fitted in the perforation Q, the inside of the fluid pipe 1 is opened without being blocked by the operating body 5, so that clean water can flow.

  Next, as shown in FIGS. 7 and 8, the operating body 5 is attached to the outer surface of the operating body 5 by moving the inside of the case 2 upward by the rotation of the rotating screw 4 generated by the horizontal rotation of the handle 76. The upward pulling force acts on the core 40 formed, but the fact that the flange 41a of the core 40 is engaged with the inner peripheral surface of the fluid pipe 1 near the perforation Q acts as a reaction force (see FIG. The core 40 is removed from the constricted portion 7a of the operating body 5 that moves upward while maintaining the state of being fitted into the perforation Q against the pulling force.

  As shown in FIG. 9, after the core 40 is fitted into the perforation Q by the operating body 5, the valve body 60 as a gate valve for blocking or opening the conduit of the fluid pipe 1 is used instead of the operating body 5. Is disposed in the case 2. More specifically, first, as shown in FIGS. 8 and 9, the handle 76 is removed from the rotation operation portion 4 a and the valve lid 3 is connected to the arm 74 via the intermediate member 75 to open the openings 71, 71 of the outer cover 70. Is closed by lid bodies 72 and 72 and bolts and nuts 73.

  Then, the fixing bolt 16 is removed from the valve lid 3 and the arm 74 is moved upward to raise the valve lid 3 and the operating body 5, and then the work valve 36 is operated to stop the water in the branch pipe 12. In addition, the on-off valve of the communication member is closed.

  Next, the outer cover 70 is removed from the upper end of the housing 35. And while removing the operation body 5 from the rotation screw 4 of the valve lid 3 arrange | positioned in the outer cover 70, it replaces with the operation body 5 and attaches the valve body 60 to the rotation screw 4. FIG. Thereafter, as shown in FIG. 10, the outer cover 70 is again watertightly connected to the upper end portion of the housing 35, the air valve and the work valve 36 are operated to open the branch pipe 12, and the outer cover 70. The inside and the branch pipe 12 are filled with clean water. Furthermore, the water pressure in the outer cover 70 and the water pressure in the branch pipe 12 are always kept constant by opening the on-off valve of the communication member again after closing the air valve.

  The valve body 60 is made of an elastic material having a diameter that can be inserted into the perforation Q, and has a guide groove 61, an overhang portion 62, a screw top 63, and an insertion hole 64 that have the same configuration as the operation body 5. doing. Therefore, the valve body 60 can move up and down according to the rotation of the rotation operation unit 4a.

  As shown in FIG. 11, the pressure lid (not shown) is attached in advance to the outer cover after the work valve 36 is opened as shown in FIG. 11. The valve lid 3 is hermetically sealed to the upper flange 12a of the branch pipe 12 while suppressing the drag received by the valve lid 3 from the water flowing in the fluid pipe 1 by pressing against the branch pipe 12 in a continuous water state. The assembly bolt 16 is screwed into the valve lid 3 again. Further, the open / close valve of the communication member is closed, and the casing 35 and the outer cover 70 are removed from the upper flange 12a. Finally, the ring-shaped flange 9 is inserted into the valve lid 3, and the flange 9 and the branch pipe 12 are fastened with bolts and nuts 14.

  Thereafter, the valve body 60 is moved downward by the rotation of the rotation operation portion 4a, thereby shutting off the conduit of the fluid pipe 1 by being in contact with the inner peripheral surface of the fluid pipe 1 while being elastically deformed and watertight. The fluid pipe 1 is opened by moving upward by the rotation of the operation unit 4a. In order to block and open the conduit of the fluid pipe 1 by the valve body 60, the handle 76 described above may be attached to the rotation operation unit 4a and horizontally rotated.

  As described above, in the core fitting device 10 and the core fitting method according to the present embodiment, the core 40 has elasticity that can be deformed in the diameter reducing direction in order to engage with the inner surface of the fluid pipe 1 in the vicinity of the perforation Q. In the natural state, it is provided with a flange 41a that protrudes in the outer diameter direction from the perforation Q, and the core 40 approaches the perforation Q together with the operation body 5 while being attached to the outer peripheral surface of the operation body 5. When the collar portion 41a is engaged with the inner surface of the fluid pipe 1, the core 40 is fitted into the perforation Q, and when the operating body 5 is separated from the perforation Q, the core 40 is operated while being fitted in the perforation Q. Since it is removed from the body 5, the operating body with the core 40 attached to the outer peripheral surface is inserted into the perforation Q, the diameter of the collar 41a is elastically reduced, and the inside of the perforation Q is inserted. After passing through the flange 41a, the flange 41a is in a natural state in the fluid pipe 1. To be to elastic restoration, for example, without requiring special measures, such as for expanded core 40, it can be easily inlaid be the core 40 against the borehole Q. In addition, after the core 40 is fitted to the perforation Q, when the operating body 5 is separated from the perforation Q, the flange portion 41a is locked to the inner surface of the fluid pipe 1 in the vicinity of the perforation Q. Only the operating body 5 can be reliably separated from the perforation Q while the fitting of the 40 perforations Q is maintained.

  Further, since the core 40 includes the anticorrosion member 42 that abuts over substantially the entire inner peripheral surface of the perforation Q, by bringing the anticorrosion member 42 of the core 40 into abutment over the substantially entire inner peripheral surface of the perforation Q, Corrosion prevention of the perforations Q can be ensured.

  Further, since the core 40 has a rear end portion 41d having a diameter larger than that of the perforation Q, the core 40 has a rear end portion 41d brought into contact with the outer surface of the fluid pipe 1 in the vicinity of the perforation Q. Insertion can be prevented.

  In addition, the valve body 60 that can block or open the flow path of the fluid pipe 1 can be replaced in place of the operation body 5 after the core 40 is fitted in the perforation Q on the rotary screw 4. Since the configuration other than the operating body 5 and the valve body 60 is shared between the fitting of the perforated Q and the flow path of the fluid pipe 1, the flow path of the fluid pipe 1 is individually blocked or opened. This can be done at a low cost without using the above configuration.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, the valve body 60 is a gate valve that is operated in the axial direction of the rotary screw 4 in the case 2, but the valve body of the present invention is a core valve when the flow path of the fluid pipe is shut off. A so-called butterfly valve or the like that shuts off the flow path by being rotated around an axis may be used as long as it has a configuration that comes into contact with the contact portion in a sealed manner.

  Moreover, in the said Example, although the fluid pipe | tube 1 is a metal pipe | tube and the core 40 is an anticorrosion core provided with the anticorrosion member 42 which prevents the perforation Q drilled in the fluid pipe | tube 1, The material of the pipe or the use of the core is not necessarily limited to the present embodiment. For example, the fluid pipe is a resin pipe such as a vinyl chloride pipe, and the core is a peripheral pipe wall of a perforation formed in the resin pipe. It may be a core provided for the purpose of increasing strength.

  Moreover, in the said Example, although the cylindrical body 41 and the anti-corrosion member 42 which comprise the core 40 consist of resin materials, such as polyethylene, the material of the member which comprises a core may be a rubber material, for example. However, it may be made of other materials such as an elastomer.

  In the above embodiment, the valve lid 3 after the core 40 is fitted in the perforation Q is removed from the intermediate member 75, and the valve body 60 is attached in the valve lid 3 in place of the operating body 5. The attached valve lid 3 is attached to the intermediate member 75 again. However, a valve lid to which the valve body 60 is previously attached is separately prepared, and the valve body 3 is replaced with the valve lid 3 after the core 40 is fitted in the perforation Q. The valve lid to which 60 is attached may be attached to the intermediate member 75.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Case 4 Rotating screw 5 Operation body 10 Core insertion apparatus 40 Core 41 Cylindrical body 41a ridge part 41d Rear end part 42 Corrosion prevention member 50 Punching device 60 Valve body Q Drilling

Claims (5)

A case that is connected to a perforation formed in the fluid pipe and that has an outer periphery of the fluid pipe covered in a hermetically sealed manner, and is attached to a non-raising rotary screw in the case, and the rotation screw rotates toward the perforation. A core fitting device comprising: an operating body that is operated in a state in which rotation is restricted ; and a substantially cylindrical core that is removably attached to the operating body and is fitted into the perforation,
The tip portion of the core disposed inside the fluid pipe is formed in a flange portion having a curved tip surface having substantially the same curvature as the inner peripheral surface of the fluid pipe so as to follow the curved shape of the perforation. and has the core which is attached to the outer peripheral surface of the front SL operating body is inserted into the flange portion in the borehole while shrink-deformed with the tip, the collar portion is the fluid tube which has passed through the perforations The core is fitted into the perforation when the operating body is separated from the perforation by being elastically restored inside and engaging with the inner peripheral surface of the fluid pipe. The core fitting device, wherein the core fitting device is removed from the operating body as it is.   The core fitting apparatus according to claim 1, wherein the core includes an anticorrosion member that abuts over substantially the entire inner peripheral surface of the perforation.   The core fitting apparatus according to claim 1, wherein the core includes a rear end portion having a diameter larger than that of the perforation. Flow path blocking or openable valve body before Symbol fluid tube, a core inlaid apparatus according to any one of 3 claims 1, characterized in that it is attachable to the rotating screw or case. A case that is connected to a perforation formed in the fluid pipe and that has an outer periphery of the fluid pipe covered in a hermetically sealed manner, and is attached to a non-raising rotary screw in the case, and the rotation screw rotates toward the perforation. A core fitting method using an operating body that is operated in a state where rotation is restricted , and a substantially cylindrical core that is removably attached to the operating body and is fitted into the perforation,
The tip portion of the core disposed inside the fluid pipe is formed in a flange portion having a curved tip surface having substantially the same curvature as the inner peripheral surface of the fluid pipe so as to follow the curved shape of the perforation. and has the core which is attached to the outer peripheral surface of the front SL operating body is inserted into the flange portion in the borehole while shrink-deformed with the tip, the collar portion is the fluid tube which has passed through the perforations The core is fitted into the perforation when the operating body is separated from the perforation by being elastically restored inside and engaging with the inner peripheral surface of the fluid pipe. The core fitting method, wherein the core is removed from the operating body as it is.

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