JP2012067848A - Gate stop valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gate stop valve that can surely block a passage without forming a gap between a step of a core and a valve body.SOLUTION: The gate stop valve 10 includes: a case 2 which communicates with a protrusive hole Q protrusively formed at a fluid pipe 1 and tightly coats the outer periphery of the fluid pipe 1; the valve body 5 which is operated by the rotation of a non-rising rotating screw 4 in the case 2 via the protrusive hole Q; and the cylinder core 40 which is inserted into the protrusive hole Q and engaged with the protrusive hole Q by a diameter-expander 58. The gate stop valve can block or release the passage of the fluid pipe 1. The core 40 is composed of a support member 41 having an outer peripheral surface along an internal periphery face of the protrusive hole Q and an inner peripheral surface 41e which abuts on the valve body 5, and an elastic member 42 which is formed at the outer peripheral surface of the support member 41 and abuts on the protrusive hole Q all over the inner peripheral surface of the protrusive hole. The elastic member 42 has, at the abutting part of the support member 41 and the valve body 5, an extension part 42a which is formed almost flush with the inner peripheral surface 41e of the support member 41 and extends toward the inner peripheral surface of the fluid pipe 1.

Description

  The present invention is a case in which the outer periphery of the fluid pipe is sealed and communicated with a perforation formed in the fluid pipe, and a valve body that is operated through the perforation by rotation of a non-raising rotary screw in the case. And a cylindrical core that is inserted into the perforation and fitted into the perforation by a diameter expanding means, and relates to a flow control valve that can shut off or open a flow path of a fluid pipe.

  Conventionally, a perforation is made in a pipe wall in a case where the outer periphery of a fluid pipe is sealed, and a core made of a substantially cylindrical body is attached to the perforation, and the core is enlarged by a diameter-expanding means. (See, for example, Patent Document 1).

Japanese Patent Laid-Open No. 7-332583 (page 3, FIG. 1)

  However, in Patent Document 1, a step is generated between the tip of the core expanded by the diameter expanding means and the inner peripheral surface of the fluid pipe. Therefore, the valve body opens and closes the flow path through the core. When inserting, there is a problem that a gap is formed between the valve body and the step, and there is a possibility that the flow path cannot be reliably blocked.

  The present invention has been made paying attention to such problems, and an object thereof is to provide a flow control valve capable of reliably blocking a flow path without generating a gap between a core step and a valve body. To do.

In order to solve the above-mentioned problem,
A case in which the outer periphery of the fluid pipe is hermetically covered in communication with a perforation formed in the fluid pipe, a valve body operated through the perforation by rotation of a non-raising rotary screw in the case, A cylindrical core inserted into the perforation and fitted into the perforation by means of diameter expansion means, and a flow control valve capable of blocking or opening the flow path of the fluid pipe,
The core includes a support member having an outer peripheral surface along the inner peripheral surface of the perforation and an inner peripheral surface that contacts the valve body, and is provided on the outer peripheral surface of the support member over the inner peripheral surface of the perforation. An elastic member that is in contact with the inner surface of the fluid pipe, and the elastic member is substantially flush with an inner peripheral surface of the support member at a contact portion between the support member and the valve body. It has the extended part extended toward the surface, It is characterized by the above-mentioned.
According to this feature, the elastic member of the core is extended at the contact portion between the support member and the valve body so as to be substantially flush with the inner peripheral surface of the support member and toward the inner peripheral surface of the fluid pipe. Since the elastic member is interposed between the inner peripheral surface of the support member that contacts the valve body and the inner peripheral surface of the fluid pipe, the valve body that is inserted into the core Contact with the circumferential surface and substantially the same elastic member without any step, and further contact with the inner peripheral surface of the fluid pipe smoothly transferred from the elastic deformation contact surface of the elastic member, the valve body, the core and the fluid pipe In addition to being able to reliably block the flow path without generating a gap, the flow path can be opened without being caught by the inner peripheral surface of the support member.

The control valve of the present invention is
The support member has a notch formed by notching the inner peripheral surface side of the fluid pipe at a contact portion with the valve body, and the elastic member is extended to the notch. It is said.
According to this feature, the extended portion of the elastic member is extended in the cutout portion formed by cutting the inner peripheral surface side of the fluid pipe of the support member, and the contact surface of the elastic member that contacts the valve body is elongated. Therefore, it is possible to smoothly transition from the inner peripheral surface of the support member to the inner peripheral surface of the fluid pipe via the elastic member.

The control valve of the present invention is
The support member is made of a metal material.
According to this feature, the thickness of the support member can be reduced while maintaining the strength, so that the opening area of the support member can be increased.

The control valve of the present invention is
The elastic member is an anticorrosion member that prevents the inner peripheral surface of the perforation.
According to this feature, even in the case of a perforation formed in a metal fluid pipe, the perforation can be prevented from being corroded.

It is an expanded sectional view which shows the state which has pierced the fluid pipe | tube in Example 1. FIG. It is front sectional drawing which shows the state which attached the core by the drive means. (A) is side surface sectional drawing of a core, (b) is front sectional drawing of a core. It is a side view of the partial cross section which shows the state which inserted and arranged the core in the piercing | piercing by the drive means. It is a side view of the partial cross section which shows the state which fitted the core to the perforation by the drive means. It is front sectional drawing of the flow control valve which shows the state before installation of a valve body. It is front sectional drawing of the flow control valve which shows the state which the valve body interrupted | blocked / opened the flow path. It is a side view of the partial cross section of a flow control valve like FIG. It is front sectional drawing which shows the state which attached the core to the valve body in Example 2. FIG. It is front sectional drawing of the flow control valve which shows the state which fitted the core to the perforation.

  EMBODIMENT OF THE INVENTION The form for implementing the control valve which concerns on this invention is demonstrated below based on an Example.

  The control valve according to the first embodiment will be described with reference to FIGS. As shown in FIGS. 7 and 8, the flow control valve 10 is a case in which the outer periphery of the fluid pipe 1 is mainly covered with a perforation Q formed in the upper part of the fluid pipe 1 through which clean water flows. 2, a valve body 5 that is a gate valve that is moved up and down in the case 2 by the rotation of the rotating screw 4, that is, operated in the axial direction of the rotating screw 4, and is inserted into the perforation Q and inserted through the inside as described later. A substantially cylindrical core 40 into which the valve body 5 can be inserted, and the conduit of the fluid pipe 1 is opened or closed by the vertical movement of the valve body 5.

  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 is not limited to the mortar layer, and may be coated with, for example, an epoxy resin, 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 has a branch pipe 12 and a valve lid 3 having an inner space in the vertical direction substantially perpendicular 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 via a seal member 23 at a position sandwiching the fluid pipe 1, and a plurality of bolts arranged along the longitudinal direction of the fluid pipe 1. Fastened with a nut 13. 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, the water pressure in the branch pipe 12 is applied 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, the casing 35 in which the work valve 36 and the punching device 50 are disposed is connected to the upper flange 12a of the branch pipe 12 in a watertight manner. The piercing device 50 is connected to a piercing machine (not shown) and is fixed to the tip of a shaft member 51 that extends in the axial direction in the branch pipe 12 toward the fluid pipe 1 and rotates around the axis, and pierces the fluid pipe 1. The cutter member 52 includes a perforating blade 52a. The cutter member 52 is approached to the outer surface of the fluid pipe 1 to perforate the outer wall, and the perforation Q is formed in the pipe wall of the fluid pipe 1.

  After drilling the perforation Q by the perforating apparatus 50, the perforating apparatus 50 is pulled up and disposed in the housing 35, and then the work valve 36 is operated to temporarily stop the branch pipe 12. Then, as shown in FIG. 2, instead of the punching machine, an insertion machine 60 to which an attachment 58 as a diameter expanding means in the present invention for fitting the core 40 to the lower end portion of the shaft member 62 is connected. Connect to the housing 35. The insertion device 60 includes a feed shaft 63 for moving the shaft member 62 to which the attachment 58 is connected in the vertical direction. The feed shaft 63 is rotated by using the handle 61 so that the attachment 58 is pivoted. It can be moved up and down together with the member 62.

  An expansion rubber 58a that is elastically deformed is attached to the outer periphery of the attachment 58, and the lower end of the attachment 58 is connected to the shaft member 62. The expansion rubber 58a is moved upward from below by rotating the shaft member 62. A pressing plate 58b that presses toward the upper end 58c is screwed. A substantially cylindrical core 40 is detachably attached to the outer periphery of the attachment 58.

  Next, as shown in FIGS. 3 (a) and 3 (b), 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 includes a support member 41 having a substantially circular peripheral wall in plan view and having an inner through-hole formed therein, and an anticorrosion member 42 as an elastic member disposed on the outer peripheral surface of the support member 41. It is configured. The distal end side of the core 40 is formed in a curved shape in the circumferential direction so as to follow the inner peripheral surface shape of the perforation Q formed in the radial direction in the fluid pipe 1 having a substantially circular shape in cross section. The support member 41 is made of a metal material such as stainless steel, titanium, or copper having corrosion resistance. On the outer peripheral surface of the support member 41, the support member 41 is of the same kind or different type and softer than the support member 41 and elastic. The anticorrosion member 42 made of a resin material having the above is bonded by an adhesive (not shown). The anticorrosion member 42 may be thermally welded to the outer peripheral surface of the support member 41, for example.

  More specifically, the support member 41 includes a barrel portion 41c having an anticorrosion member 42 attached to the outer peripheral surface, and a rear end portion 41d that continues to the barrel portion 41c and bulges to a larger diameter than the perforations Q. . Further, as shown in FIG. 3 (a), a cutout portion in which the inner peripheral surface 1a side of the fluid pipe 1 is cut out in a state where the support member 41 is in contact with the valve body 5 in a state where the support member 41 is fitted into the perforation Q. 41a is formed.

  The anticorrosion member 42 bonded over the outer peripheral surface of the trunk portion 41c has a larger diameter than the perforation Q in its natural state and is softer than the support member 41, so that it is more easily elastically deformed. Yes. Further, the anticorrosion member 42 is extended to the notch 41 a of the support member 41, is substantially flush with the inner peripheral surface 41 e of the support member 41 and extends toward the inner peripheral surface 1 a of the fluid pipe 1. It has a portion 42a.

  In the flow control valve 10 having the above-described configuration, attachment of the core 40 to the perforation Q will be described. As shown in FIGS. 2 and 3, after the perforation device 50 punctures the perforation Q in the fluid pipe 1 as shown in FIG. The core 40 attached to the outer peripheral surface of the attachment 58 is inserted into the perforation Q by moving the inside of the case 2 downward together with the core 40 by the rotation operation by the handle 61 of the feed shaft 63 provided.

  As shown in FIG. 4, the extended portion 42 a of the anticorrosion member 42 enters the core 40 along the inner peripheral surface 1 a of the fluid pipe 1 and is inserted into the perforation Q. When the core 40 is inserted and disposed 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.

  Next, after inserting the core 40 into the perforation Q, the pressing plate 58b is moved upward by the rotation operation of the handle 61 of the shaft member 62, and the expansion rubber 58a is moved between the upper end portion 58c of the attachment 58 and the pressing plate 58b. It is pinched and elastically deformed. Part of the elastically deformed expansion rubber 58a presses a non-contact portion with the valve body 5 at the lower end portion of the support member 41 toward the diameter-enlarging direction of the support member 41 so that the valve at the lower end portion of the support member 41 A non-contact part with the body 5 is pushed and expanded. By doing so, the core 40 holds the fluid pipe 1 between the rear end portion 41d and the non-contact portion of the lower end portion of the support member 41 with the valve body 5, and the core 40 is fitted into the perforation Q. Is completed.

  After the insertion of the core 40 into the perforation Q is completed, the pressing of the expansion rubber 58a by the pressing plate 58b is released, and the attachment 58 is moved into the case 2 by the reverse rotation operation by the handle 61 of the feed shaft 63. Is removed from the attachment 58.

  Thereafter, in place of the insertion machine 60, as shown in FIG. 6, the valve body 5 for blocking or opening the conduit of the fluid pipe 1 is disposed in the case 2. More specifically, the valve lid 3 including the valve body 5 is connected to the inside, and the openings 71 and 71 of the outer cover 70 are closed by the lid bodies 72 and 72 and the bolts and nuts 73.

  In the outer cover 70, the valve lid 3, the valve body 5, and the rotating screw 4 are arranged in a state of being assembled with each other, and these members are further attached to the outer cover in advance by pressing means (not shown). ), The valve lid 3 is assembled in a sealed manner on the upper flange 12a of the branch pipe 12. 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.

  As shown in FIG. 7, a ring-shaped flange 9 is inserted into the valve lid 3 so that the valve lid 3 is fixed, and while fixing the position of the valve lid 3 with the fixing bolt 16, The branch pipe 12 is fastened. The flange 9 regulates the valve lid 3 in the vertical direction by engaging the inner circumferential portion thereof with the outer circumferential portion of the valve lid 3.

  The rotating screw 4 is rotatably attached to an insertion hole 32 formed in the top of the valve lid 3 so that the upper end protrudes outside the valve lid 3. The holding plate 33 is fixed to the upper end surface of the valve lid 3 with a bolt 34 and prevents the rotation screw 4 from being pulled out. 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. The screw top 25 is fitted into a guide groove 21 (see FIG. 6) formed in the upper end portion of the valve body 5 described later, and is screwed into the screw portion 4b, and is formed at the upper end portion of the rotating screw 4. By rotating the screw portion 4b according to the rotation of the rotation operation portion 4a, the valve body 5 can move up and down following the screw top 25 screwed along the screw portion 4b.

  As shown in FIGS. 6, 7, and 8, the valve body 5 includes a valve body 6 formed of a casting or a steel material, and a rubber body 7 made of an elastic material covering almost the entire surface of the valve body 6. With. The valve body 5 is formed with an insertion hole 31 into which the screw portion 4b of the rotary screw 4 is inserted.

  In addition, overhanging portions 8 and 8 extending in the vertical direction are slid along the groove 3 a provided on the inner surface of the valve lid 3 or the branch pipe 12 constituting the case 2 on the upper and lower outer surfaces of the valve body 5. It is extended in the vertical direction so that it can contact. The overhang portions 8, 8 configured as described above are in contact with the groove portion 3 a, so that the rotation of the valve body 5 accompanying the rotation of the rotary screw 4 can be regulated.

  The rubber body 7 can shut off the conduit of the fluid pipe 1 by watertightly contacting along the inner peripheral surface of the fluid pipe 1 and the peripheral face of the core 40 fitted in the perforation Q as will be described later. Is formed. Further, the valve body 6 is covered with a rubber body 7 via a release agent applied to substantially the entire surface thereof, and the close contact between the valve body 6 and the rubber body 7 is prevented by this release agent. ing.

  By doing so, since the rubber body 7 is not in close contact with the valve body 6 by the release agent, when the valve body 5 is partitioned toward the fluid pipe 1 by the rotation of the rotary screw 4 ( 6 and 7), it is easy to elastically deform following the inner peripheral surface of the fluid pipe 1, and the water tightness can be sufficiently maintained over the inner peripheral surface of the fluid pipe 1.

  Thereafter, as shown in FIGS. 7 and 8, the user can arbitrarily rotate the rotating screw 4 while maintaining the state where the core 40 is fitted to the perforation Q, that is, the state where the core 40 prevents the perforation Q. , The valve body 5 is moved downward to block the fluid pipe 1, or the valve body 5 is moved upward to open the pipe.

  As described above, in the flow control valve 10 according to the present embodiment, the core 40 includes the support member 41 having the outer peripheral surface along the inner peripheral surface of the perforation Q and the inner peripheral surface 41e that contacts the valve body 5, and the support member. The elastic member is provided on the outer peripheral surface of the perforated Q and is in contact with the inner peripheral surface of the perforation Q. The elastic member is located at the contact portion between the support member 41 and the valve body 5 of the support member 41. Since it has the extended part 42a which became substantially flush with the inner peripheral surface 41e and extended toward the inner peripheral surface of the fluid pipe 1, the elastic member of the core 40 is formed between the support member 41 and the valve body 5. A support member that has an extended portion 42 a that is substantially flush with the inner peripheral surface 41 e of the support member 41 and extends toward the inner peripheral surface of the fluid pipe 1 at the contact portion, and that contacts the valve body 5. Since an elastic member is interposed between the inner peripheral surface 41 e of 41 and the inner peripheral surface of the fluid pipe 1, the elastic member is inserted into the core 40. The body 5 abuts on the inner circumferential surface 41e of the support member 41 and the substantially flush elastic member without any step, and further abuts on the inner circumferential surface of the fluid pipe 1 that has smoothly shifted from the abutting surface of the elastic member that is elastically deformed. In other words, the flow path can be opened without being caught by the inner peripheral surface 41e of the support member 41 as well as being able to reliably block the flow path without generating a gap between the valve body 5 and the core 40 and the fluid pipe 1. .

  In addition, the support member 41 is formed with a notch 41a in which the inner peripheral surface side of the fluid pipe 1 is notched at a contact point with the valve body 5, and an elastic member is extended in the notch 41a. The elastic member extending portion 42a extends from the cutout portion 41a of the support member 41 that is cut out on the inner peripheral surface side of the fluid pipe 1, and the elastic member that contacts the valve body 5 has a long contact surface. Therefore, it is possible to smoothly transition from the inner peripheral surface 41 e of the support member 41 to the inner peripheral surface of the fluid pipe 1 via the anticorrosion member 42.

  In addition, since the support member 41 is made of a metal material, the thickness of the support member 41 can be reduced while maintaining the strength. Therefore, the opening area of the support member 41 can be increased.

  In addition, since the elastic member is the anticorrosion member 42 that prevents the inner peripheral surface of the perforation Q, the perforation Q can be prevented from being corroded even in the case of the perforation Q formed in the metal fluid pipe 1.

  Next, the core according to the second embodiment will be described with reference to FIGS. The description of the same components as those in the above embodiment is omitted.

  In the same manner as in the first embodiment described above, a valve for opening and closing the perforation Q as shown in FIG. The body 5 and the core 40 that is detachably attached to the outer peripheral surface of the valve body 5 in advance are disposed in the case 2.

  A concave portion 7a is formed on the outer surface of the rubber body 7 in the circumferential direction, and the core 40 is attached to the concave portion 7a by engaging the core 40 in the downward operation of the valve body 5 described later. There will be no detachment from the valve body 5.

  In the flow control valve 10 having the above-described configuration, attachment of the core 40 to the perforation Q will be described. As shown in FIG. 9, after the perforation device 50 punctures the perforation Q in the fluid pipe 1 as shown in FIG. 1, the valve body 5 detachably attached to the outer peripheral surface is not rotated as shown in FIG. 9. The core 40 attached to the outer peripheral surface of the valve body 5 is inserted into the perforation Q by operating the inside of the case 2 together with the core 40 by the rotation of the screw 4 (see FIG. 10).

  The rubber body 7 of the valve body 5 is in close contact with the inner peripheral surface of the fluid pipe 1 through the perforation Q, thereby blocking the pipe line, and as shown in FIG. 10, the core 40 blocks the pipe line. Due to the elastic deformation of the rubber member 7, the non-contact portion with the valve body 5 at the lower end portion of the support member 41 is pressed toward the diameter increasing direction of the support member 41. For this reason, the core 40 holds the fluid pipe 1 between the rear end portion 41d and the non-contact portion of the lower end portion of the support member 41 with the valve body 5, and the fitting of the core 40 into the perforation Q is completed. That is, in this embodiment, the valve body 5 constitutes a diameter expanding means.

  Next, as shown in FIG. 10, the valve body 5 is moved upward in the case 2 by the rotation of the rotating screw 4, thereby pulling upward toward the core 40 attached to the outer surface of the valve body 5. Although the force acts, the core 40 holds the fluid pipe 1 between the rear end portion 41d and the non-contact portion of the lower end portion of the support member 41 with the valve body 5, and thus resists the pulling force. The state fitted in the perforation Q is maintained, that is, it is removed from the recessed portion 7a of the rubber body 7 that moves upward. The valve body 5 moves upward in the case 2 while leaving the core 40 in the perforation Q, and the rubber body 7 is separated from the inner peripheral surface of the fluid pipe 1, so that the conduit of the fluid pipe 1 is opened.

  Thereafter, the user arbitrarily rotates the rotary screw 4 while maintaining the state where the core 40 is fitted to the perforation Q, that is, the state where the core 40 is anticorrosive to the perforation Q. The pipe line of the fluid pipe 1 is blocked by moving downward, or the pipe line can be opened by moving the valve body 5 upward.

  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-described embodiment, the valve body 5 of the flow control valve 10 is a gate valve operated in the axial direction of the rotary screw 4 in the case 2, but the valve body of the present invention is a flow path of a fluid pipe. A so-called butterfly valve or the like that shuts off the flow path by being rotated around an axis may be used, for example, as long as it has a configuration that abuts in a sealing manner with the abutting portion of the core when shutting off.

  Further, for example, in the above-described embodiment, the fluid pipe 1 is a metal pipe, and the core 40 is an anticorrosion core provided with the anticorrosion member 42 for preventing the perforation Q formed in the fluid pipe 1. The material of the fluid 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 wall of the perforation in which the core is drilled in the resin pipe The core may be provided for the purpose of increasing the strength.

  For example, in the said Example, although the supporting member 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.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Case 4 Rotating screw 5 Valve body (diameter expansion means)
10 Control valve 40 Core 41 Support member 41a Notch part 42 Anticorrosion member (elastic member)
42a Extension part 50 Punching device 52 Cutter member 58 Attachment (diameter expansion means)
58a Extended rubber 60 insertion machine

Claims (4)

A case in which the outer periphery of the fluid pipe is hermetically covered in communication with a perforation formed in the fluid pipe, a valve body operated through the perforation by rotation of a non-raising rotary screw in the case, A cylindrical core inserted into the perforation and fitted into the perforation by means of diameter expansion means, and a flow control valve capable of blocking or opening the flow path of the fluid pipe,
The core includes a support member having an outer peripheral surface along the inner peripheral surface of the perforation and an inner peripheral surface that contacts the valve body, and is provided on the outer peripheral surface of the support member over the inner peripheral surface of the perforation. An elastic member that is in contact with the inner surface of the fluid pipe, and the elastic member is substantially flush with an inner peripheral surface of the support member at a contact portion between the support member and the valve body. A flow control valve comprising an extending portion extending toward the surface.   The support member has a notch formed by notching the inner peripheral surface side of the fluid pipe at a contact portion with the valve body, and the elastic member is extended to the notch. The flow control valve according to claim 1.   The said support member is comprised with the metal material, The flow control valve of Claim 1 or 2 characterized by the above-mentioned.   The said elastic member is a corrosion prevention member which corrosion-proofs the internal peripheral surface of the said perforation, The current control valve in any one of Claim 1 thru | or 3 characterized by the above-mentioned.

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