JP2011169426A - Flow control valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flow control valve maintaining passage intercepting property without requiring work time for surface machining of an inner peripheral surface of a borehole. <P>SOLUTION: The flow control valve 10 intercepting a passage of a fluid pipe 1 includes a case 2 hermetically covering the outer periphery of the fluid pipe 1 while communicating with the borehole Q bored in the fluid pipe 1, and a valve element 5 operated through the borehole Q within the case 2 by the rotation of a non-rising rotary screw 4. A core 40 of substantially cylindrical body capable of operating the valve element 5 through the inside is hermetically fitted to the inner peripheral surface of the borehole Q, and an abutting part 40b hermetically abutting on the valve element 5 is provided on the surface of the core 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention includes a case that communicates with a perforation formed in a fluid pipe and covers the outer periphery of the fluid pipe in a sealed manner, and a valve element that operates through the perforation in the case by rotation of a non-lifting rotary screw. The present invention relates to a flow control valve that can shut off a flow path of a fluid pipe.

  In the conventional control valve, the inner peripheral surface of the perforation in which the surface of the valve element that operates through the perforation in the case comes into contact with the inner peripheral surface of the fluid pipe in a sealing manner and is continuous with the inner peripheral surface of the fluid pipe. In addition, the flow path of the fluid pipe is blocked by abutting in a sealed manner (see, for example, Patent Document 1).

JP 2008-95795 A (page 7, FIG. 2)

  However, in Patent Document 1, there is a case where a sharp portion is generated on the inner peripheral surface or the peripheral edge of the perforation due to the drilling process, and the surface of the valve body is repeatedly formed on the perforated surface of the perforation every time the valve body is operated. Due to the sliding contact, there is a problem that the surface of the valve body is damaged, and there is a possibility that the sealing performance at the time of shutting off the flow path of the fluid pipe cannot be maintained. In particular, when the fluid pipe is a metal pipe, a sharp portion is likely to be generated on the drilled surface by the drilling process, and the above-described possibility increases.

  The present invention has been made paying attention to such problems, and provides a flow control valve that can maintain the blocking performance of the flow path without spending work on the surface processing of the inner peripheral surface of the perforation. Objective.

In order to solve the above-mentioned problem,
A case in which the outer periphery of the fluid pipe is hermetically covered, and a valve body that is operated through the perforation in the case by rotation of a non-raising rotary screw. And a flow control valve capable of blocking the flow path of the fluid pipe,
A core, which is a substantially cylindrical body and capable of operating the valve body through the inside, is fitted in a sealed manner on the inner peripheral surface of the perforation, and the core is contacted with the valve body in a sealed manner. It is characterized in that an abutting portion that comes into contact is provided.
According to this feature, the valve body operated through the perforation formed in the fluid pipe in the case is fitted in a sealed manner on the inner peripheral surface of the perforation without directly contacting the perforation. By sealingly contacting the contact portion of the core, sealing performance between the core and the perforation can be ensured, and the flow path of the fluid pipe can be reliably blocked.

The control valve of the present invention is
The case is characterized in that a movement preventing portion for preventing movement of the core fitted on the inner peripheral surface of the perforation is provided.
According to this feature, since the movement preventing portion prevents the movement of the core fitted on the inner peripheral surface of the perforation, even if the valve body is operated through the inside of the core, The core does not move, and the sealed state of the perforations can be maintained.

The control valve of the present invention is
The core has a locking portion that locks to the outer peripheral surface of the fluid pipe, and the movement preventing portion is disposed at a movement preventing position that sandwiches the locking portion with the outer peripheral surface of the fluid pipe. It is characterized by being installed.
According to this feature, the movement preventing portion is disposed at a movement preventing position that sandwiches the locking portion with the outer peripheral surface of the fluid pipe by using the locking portion of the core that is locked to the outer peripheral surface of the fluid pipe. Only the core can be prevented from moving.

The control valve of the present invention is
The movement preventing part is provided so as to be movable between a retreat position for retreating from a core fitted in the perforation and the movement preventing position.
According to this feature, when the core is fitted into the perforation, the core can be fitted without being interfered by the movement preventing portion that prevents the movement of the core by retracting the movement preventing portion to the retracted position. .

The control valve of the present invention is
The movement preventing portion is a screw provided so as to be screwable from the outside of the case.
According to this feature, the movement preventing part can be easily moved from the outside of the case, and versatility is enhanced by using the movement preventing part as a screw.

It is a partial cross section figure which shows the state which assembled | attached the branch pipe of the water control valve in an Example. It is sectional drawing which shows the state which perforated | pierced the fluid pipe | tube. It is sectional drawing which shows the state which fitted the core in perforation. (A) is a partial sectional view of a core, (b) is a partial sectional side view of a core. It is sectional drawing which shows the state which the water control valve opened the flow path. FIG. 6 is a side sectional view similar to FIG. 5. It is sectional drawing which shows the state which the water control valve interrupted | blocked the flow path. FIG. 8 is a side sectional view similar to FIG. 7.

  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 embodiment will be described with reference to FIGS. As shown in FIGS. 5 to 8, the water control valve 10 as the control valve of the present invention is mainly a perforation Q having a substantially circular shape in a top view formed in the upper part of the fluid pipe 1 through which clean water flows. A case 2 in which the outer periphery of the fluid pipe 1 is covered in a watertight manner, and a valve body 5 which is a gate valve operated in the vertical direction in the case 2 by the rotation of the rotary screw 4, that is, the axial direction of the rotary screw 4. And shuts off the conduit of the fluid pipe 1 as will be described later.

  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. 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 flange 11 covering the lower side of the outer periphery of the fluid pipe 1. Hereinafter, it demonstrates in order of the assembly | attachment process to the fluid pipe | tube 1 of the water control valve 10. FIG.

  As shown in FIG. 1, first, the branch pipe 12 and the flange 11 are opposed to each other at a position sandwiching the fluid pipe 1, and are 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 flange 11 and the branch pipe 12 to the fluid pipe 1, water pressure is applied to the branch pipe 12 to appropriately check 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.

  In addition, female screw holes 12b and 12b penetrating the tube wall of the branch pipe 12 are formed at predetermined locations of the branch pipe 12 facing the pipe axis direction of the fluid pipe 1, and each female screw hole 12b will be described later. A screw 45 as a movement preventing portion for preventing the movement of the core 40 is movable by screwing from the outside of the branch pipe 12, and is provided in a sealed manner on the branch pipe 12 via a packing. Each female screw hole 12b is formed to face obliquely downward from the outside of the branch pipe 12 to the inside.

  Next, a perforation apparatus (not shown) is connected to the upper flange 12a of the branch pipe 12 through a valve body (not shown) in a watertight manner. The perforating apparatus is composed of a communication member having an internal space communicating with the inside of the branch pipe 12, and a cutter member provided in the communication member and perforating the fluid pipe 1 with a perforation Q. The member is approached to the outer surface of the fluid pipe 1 through the communication member and the branch pipe 12, and a perforation Q penetrating the pipe wall of the fluid pipe 1 is formed as shown in FIG.

  After drilling the perforation Q by the perforating device, a mounting device (not shown) for the core 40 is connected to the upper flange 12a of the branch pipe 12 via a valve body (not shown) in a watertight manner instead of the perforating device. The attachment device is composed of a continuous member having an internal space continuous in the branch pipe 12, and an installation member provided in the continuous member for fitting and installing the core 40 toward the perforation Q. Then, the installation member with the core 40 detachably attached is approached to the outer surface of the fluid pipe 1 through the continuous member and the inside of the branch pipe 12, and as shown in FIG. It is made to fit so that it may contact | abut over.

  When approaching the core 40 toward the perforation Q by the installation member, each screw 45 is screwed out of the branch pipe 12 so that it does not come into contact with the core 40 fitted in the perforation Q. Arranged at the retreat position for retreat.

  The core 40 will be described in detail. As shown in FIGS. 4A and 4B, the core 40 includes a core member 41 having a substantially L-shaped cross section and an entire surface of the core member 41. A rust-proof core comprising a coated elastic member 42 for rusting a metal base of a fluid pipe exposed by drilling, and having an outer peripheral surface having substantially the same diameter as the pierced Q, with both ends communicating open. It is a substantially cylindrical body. The inner peripheral surface that is the surface of the core 40 and the tapered surface that continues to the rear end side are provided as contact portions 40b that contact the valve body 5 in a sealing manner as will be described later. A locking portion 40a projecting larger in diameter than the perforation Q is formed at the rear end of the core 40, and the front end of the core 40 has a perforation Q drilled in the fluid pipe 1 having a substantially circular shape in cross section. It is formed in the curve shape in the circumferential direction so that the inner peripheral surface shape may be followed.

  As shown in FIG. 3, the core 40 has its outer peripheral surface closely in contact with the inner peripheral surface of the perforated Q where the metal substrate of the fluid pipe 1 is exposed in the circumferential direction, and the lower surface of the locking portion 40a is the peripheral edge of the perforated Q. In the fitting position where the fluid pipe 1 is in contact with the outer peripheral surface, the perforation Q is fitted.

  Next, each screw 45 is screwed inwardly into the branch pipe 12 to move to a movement preventing position where the tip of the screw 45 is brought into contact with the upper surface of the locking portion 40a to prevent the core 40 from moving. (See the white arrow in FIG. 3). That is, the screw 45 is moved to the movement preventing position, and the engaging portion 40a of the core 40 is sandwiched between the outer peripheral surface of the fluid pipe 1 and the tip end portion of the screw 45, so that the core 40 is moved away from the fitting position. Movement is prevented.

  As shown in FIGS. 5 and 6, the valve lid 3 is assembled in a sealed manner on the upper flange 12 a of the branch pipe 12. The valve lid 3 has an outer diameter smaller than the inner diameter of the branch pipe 12, and the lower part of the valve lid 3 is fitted along the inner peripheral surface of the branch pipe 12. The bottom surface and the lower outer peripheral surface of the valve lid 3 are in contact with the inner upper surface and the inner peripheral surface of the branch pipe 12, respectively, and the outer peripheral surface of the lower portion of the valve lid 3 is possible to increase the water tightness of the contact surface. A flexible material O-ring 19 is provided. Further, a ring-shaped flange 9 is inserted into the valve lid 3 so that the valve lid 3 is fixed, and the flange 9 and the branch pipe 12 are fastened with bolts and nuts 14 while fixing the position with the fixing bolt 16. An insertion hole 32 is formed in the top of the valve lid 3.

  The rotating screw 4 is rotatably attached to the insertion hole 32 of the valve lid 3 and has an upper end projecting from the valve lid 3 so as to protrude. The holding plate 33 is fixed to the upper end surface of the valve lid 3 with a bolt (not shown) 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 in a guide groove 21 formed in the upper end portion of the valve body 5 to be described later, and is screwed into the screw portion 4 b, and a rotation operation portion formed in the upper end portion of the rotary screw 4. When the 4a is rotated, the screw portion 4b is rotated accordingly, so that the valve body 5 can be moved up and down following the screw top 25.

  As shown in FIG. 5, the valve body 5 includes a valve main body 6 formed of a casting or steel material, and a rubber body 7 formed of an elastic body as a rubber portion. The valve body 6 includes a base portion 6a in which an insertion hole 31 into which the screw portion 4b of the rotary screw 4 is inserted, a lid portion 6b extending from the base portion 6a and closing the perforation Q of the fluid pipe 1, and the fluid pipe 1 It consists of a pair of valve-plate parts 6c and 6c extended from the base 6a so that it may oppose on the upstream and downstream sides.

  Further, on the outer surface on the upstream / downstream side of the base portion 6a of the valve body 6, the flange portions 8 and 8 along the vertical direction are provided in the vertical direction on the inner surface of the valve lid 3 or the branch pipe 12 constituting the case 2. (Not shown) extends in a slidable manner.

  The rubber body 7 is sandwiched between the opposed surfaces of the pair of valve plate portions 6c, 6c, and bulges in the radial direction from the tube-axis-direction valve plate portion 6c, so that the valve plate portions 6c, 6c, the lid portion 6b, and It is formed so as to cover substantially the entire surface of the base 6a, and is in watertight contact with the inner peripheral surface of the fluid pipe 1 and the peripheral surface of the perforation Q. Further, the valve plate portion 6c is covered with a rubber body 7 via a release agent applied to substantially the entire surface (shaded portion in the figure) of the valve plate portion 6c. The close contact with the rubber body 7 is prevented.

  By doing so, since the rubber body 7 is not in close contact with the valve plate portion 6c by the release agent, when the valve body 5 is partitioned toward the fluid pipe 1 by the rotation of the rotating screw 4, (Refer to FIG. 5), it is easy to elastically deform following the inner peripheral surface of the fluid pipe 1. In particular, since the rubber body 7 is sandwiched between the valve plate portions 6c and 6c disposed opposite to the upstream and downstream sides, the bulging toward the upstream and downstream sides of the rubber body 7 is restricted, and the radial direction, that is, the fluid It swells toward the inner peripheral surface of the pipe 1, and the water tightness can be sufficiently maintained over the inner peripheral surface of the fluid pipe 1.

  The function of the water control valve 10 having the above configuration will be described. As shown in FIGS. 5 to 8, the water control valve 10 is configured such that the flanges 8 and 8 are brought into contact with the inner surface of the case 2 by the rotation of the non-raising rotary screw 4. The inside of the case 2 is moved up and down together with the screw top 25 screwed into the screw portion 4b while stopping its rotation by abutting against the inner wall (not shown) of the groove portion provided in the above. When the valve body 5 is raised in the case 2, a part of the rotating screw 4 can be accommodated in the insertion hole 31 (see FIGS. 5 and 6).

  Further, when the valve body 5 is lowered in the case 2, the rubber body 7 that is sandwiched between the opposed surfaces of the valve plate portions 6c and 6c and bulges in the radial direction from the valve-axis direction valve plate portion 6c is formed. The rubber body 7 that seals against the inner circumferential surface of the fluid pipe 1 along the circumferential direction and covers the lid portion 6 b is formed on the inner circumferential surface of the core 40 that is fitted in the perforation Q of the fluid pipe 1. A pipe line of the fluid pipe 1 is blocked by abutting in a sealed manner along the pipe.

  As described above, the core 40 which is a substantially cylindrical body and can operate the valve body 5 through the inside is sealed and fitted on the inner peripheral surface of the perforation Q, and the elastic member 42 of the core 40 is provided. Since the contact portion 40b that comes into contact with the valve body 5 in a sealing manner is provided on the surface of the valve body 5, the valve body 5 operated through the perforation Q formed in the fluid pipe 1 in the case 2 is provided. By sealingly contacting the abutting portion 40b of the core 40 fitted in a sealing manner on the inner peripheral surface of the perforation Q without directly abutting on the perforation Q, a sealing property between the perforation Q can be obtained. The flow path of the fluid pipe 1 can be reliably cut off.

  Further, the branch pipe 12 of the case 2 is provided with a screw 45 as a movement preventing portion for preventing the movement of the core 40 fitted on the inner peripheral surface of the perforation Q. Since the movement of the core 40 fitted on the peripheral surface is prevented, even if the valve body 5 is operated via the inside of the core 40, the core 40 does not move with the operation of the valve body 5. The sealed state of the perforations Q can be maintained.

  Further, the screw 45 is disposed at a movement preventing position that sandwiches the locking portion 40a with the outer peripheral surface of the fluid pipe 1 by using the locking portion 40a of the core 40 that is locked to the outer peripheral surface of the fluid pipe 1. Only the core 40 can be prevented from moving.

  Further, when the core 40 is fitted into the perforation Q, the core 40 can be fitted without being interfered by the screw 45 that prevents the movement of the core 40 by retracting the screw 45 to the retracted position described above. .

  Further, since the movement preventing portion of the present invention is the screw 45 provided so as to be screwable from the outside of the case 2, the movement preventing portion can be easily moved from the outside of the case 2, By using the screw 45 as the movement preventing portion, versatility is enhanced.

  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 5 of the water control valve 10 as the flow control valve 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 As long as it has a configuration that comes into contact with the contact portion of the core in a sealed manner when the flow path of the fluid pipe is shut off, for example, a so-called butterfly valve that shuts off the flow path by being rotated around an axis may be used. Good.

  Further, for example, in the above-described embodiment, the fluid pipe 1 is a metal pipe, and the core 40 is a rust-proof core that rusts the perforation Q formed in the fluid pipe 1. The use of is not necessarily limited to the present embodiment, and for example, the fluid pipe is a resin pipe such as a vinyl chloride pipe, and the core is provided for the purpose of reinforcing the strength of the periphery of the perforation formed in the resin pipe. The core may be used.

  Further, for example, in the embodiment, the screw 45 is provided as a movement preventing portion so as to be screwable from the outside of the case 2, but for example, a plate-like locking piece is used as the movement preventing portion to lock the upper surface of the core. It may be provided.

  Further, for example, in the above-described embodiment, the screw 45 as the movement preventing portion is retracted from the core 40 fitted in the perforation Q, and the movement preventing position for preventing the movement of the core 40 fitted in the perforation Q. For example, the movement prevention unit is fixed to the movement prevention position from the beginning, and the core avoids interference with the movement prevention unit at the movement prevention position. It may be fitted in the perforation.

1 Fluid pipe 2 Case 4 Rotating screw 5 Valve body 7 Rubber body 10 Water control valve (control valve)
12 branch pipe 12b female screw hole 40 core 40a locking part 40b contact part 45 screw (movement preventing part)

Claims (5)

A case in which the outer periphery of the fluid pipe is hermetically covered, and a valve body that is operated through the perforation in the case by rotation of a non-raising rotary screw. And a flow control valve capable of blocking the flow path of the fluid pipe,
A core, which is a substantially cylindrical body and capable of operating the valve body through the inside, is fitted in a sealed manner on the inner peripheral surface of the perforation, and the core is contacted with the valve body in a sealed manner. A flow control valve characterized in that a contact portion is provided.   2. The flow control valve according to claim 1, wherein the case is provided with a movement preventing portion that prevents movement of the core fitted on the inner peripheral surface of the perforation.   The core has a locking portion that locks to the outer peripheral surface of the fluid pipe, and the movement preventing portion is disposed at a movement preventing position that sandwiches the locking portion with the outer peripheral surface of the fluid pipe. The flow control valve according to claim 2, wherein the flow control valve is provided.   The said movement prevention part is provided so that it can move between the retreat position which retracts | saves from the core fitted by the said perforation, and the said movement prevention position, The flow control of Claim 3 characterized by the above-mentioned. valve.   The flow restricting valve according to claim 4, wherein the movement preventing portion is a screw provided so as to be screwable from the outside of the case.

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