JP6112827B2 - Blocking device - Google Patents

Description

  The present invention relates to a blockage processing apparatus for sealingly closing an open end of a fluid pipe located at a terminal end among a plurality of fluid pipes constituting a fluid pipe line.

  Conventionally, for example, a closing device as shown in Patent Document 1 has been developed in order to seal the open end of a fluid tube located at the end of a plurality of fluid tubes constituting a fluid conduit in a sealing manner. ing. This is attached so as to cover the bottomed cylindrical portion (blocking member) in the closing device with respect to the opening end of the fluid pipe, and an annular shape is formed between the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the fluid pipe. By interposing the seal member, the opening end of the fluid pipe is closed in a sealed manner.

Japanese Unexamined Patent Publication No. 2004-92843 (pages 3, 4 and 2)

  However, generally, when the opening end of the fluid pipe is closed, the fluid in the fluid pipe is disconnected in a region near the closed opening end, so that impurities are likely to accumulate in the region near the opening end. Therefore, in Patent Document 1, the contaminants that flow into the vicinity of the opening end part may wrap around from the inside of the fluid pipe to the vicinity of the seal member, thereby reducing the sealing function of the seal member. A claw portion (detachment preventing member) that prevents the cylinder body from being detached by the fluid leaking from the cylinder body due to the deterioration of the sealing function of the seal member and the outer peripheral surface of the fluid pipe exposed to the fluid being corroded. May not bite into the outer peripheral surface of the fluid pipe, and there is a possibility that the cylindrical body part may come out of the opening end.

  The present invention has been made paying attention to such problems, and it is possible to suppress the entry of foreign substances between the outer peripheral surface of the fluid pipe and the inner peripheral surface of the closing member, and the sealing function of the seal member is improved. It aims at providing the obstruction | occlusion processing apparatus which can prevent that it falls.

In order to solve the above-mentioned problem, the blockage processing apparatus of the present invention includes:
Of the plurality of fluid pipes constituting the fluid pipe line, a closing member that is externally fitted to an opening end portion in which an opening end surface that is a cut surface of a metal fluid pipe located at the end is formed; A sealing member interposed between the peripheral surface and the outer peripheral surface of the fluid pipe, and a claw portion that bites into the outer peripheral surface of the fluid pipe, preventing the closing member from moving in the direction of detachment of the fluid pipe A detachment preventing member, and a clogging treatment device for clogging the open end of the fluid pipe in a sealing manner,
The blocking member holds the contaminants in the fluid pipe that are sandwiched between the blocking member and the opening end surface of the fluid pipe and are clamped by the closing member that is externally fitted in the pipe axis direction of the fluid pipe. An end sealing member for sealing is provided.
According to this feature, the contaminants in the fluid pipe are interfered by the end sealing member provided across the gap between the opening end of the fluid pipe and the closing member, whereby the outer peripheral surface of the fluid pipe and the closing member Since it can suppress that it penetrate | invades between the inner peripheral surfaces of this, the sealing function fall of a sealing member can be prevented.

The occlusion processing device of the present invention is
The end sealing member is characterized by comprising an elastically deformable elastic body covering the open end face of the open end.
According to this feature, since the end sealing member is formed of an elastic body, even if the closing member moves in the detaching direction, the end sealing member elastically deforms following the movement and the fluid pipe Since it can prevent coming off from the gap between the opening end face and the closing member, it is possible to maintain a state in which the entry of impurities from the gap is suppressed. Furthermore, since the end sealing member covers the opening end face of the opening end, the opening end face can be rust-prevented.

The occlusion processing device of the present invention is
The closing member includes a communication hole that communicates with the fluid pipe, and a plug member that can be attached to and detached from the communication hole.
According to this feature, a predetermined operation can be performed from the outside in the fluid pipe through the communication hole opened by removing the plug member from the closing member.

It is a side view which shows a part of fluid conduit. (A) is a front view which shows the obstruction | occlusion processing apparatus attached to the opening end part of the fluid pipe | tube located in the terminal of a fluid pipe line, (b) is a sectional side view which similarly shows an obstruction | occlusion processing apparatus. It is a sectional side view which shows the state before the obstruction | occlusion member moves to the direction which separates from the opening edge part of a fluid pipe | tube. It is a sectional side view which shows the state after the obstruction | occlusion member moved to the direction which detaches | leaves from the opening edge part of a fluid pipe | tube. It is a sectional side view which shows the state which performed the predetermined | prescribed operation | work in the fluid pipe | tube from the outside through the communicating hole of the obstruction | occlusion member. It is a sectional side view which shows the modification of an obstruction | occlusion processing apparatus. It is a sectional side view which shows the modification of an edge part sealing member.

  EMBODIMENT OF THE INVENTION The form for implementing the obstruction | occlusion processing apparatus which concerns on this invention is demonstrated below based on an Example.

  A working tool introduction apparatus according to an embodiment will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, the fluid pipe 1 of the present embodiment is made of, for example, ductile cast iron for waterworks buried in the ground, and is formed in a substantially circular shape in cross section, and the inner peripheral surface is powder-coated or Covered with a mortar layer. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, 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 the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. Further, in this embodiment, the fluid in the fluid pipe is clean water, but the fluid flowing in the fluid pipe is not necessarily limited to clean water, for example, industrial water, agricultural water, sewage, etc., gas, gas and liquid The gas-liquid mixture may be used.

  The fluid pipe 1 is arranged together with an on-off valve device 3 that opens and closes the flow path, other fluid pipes 1 ′, and the like to constitute a fluid pipe line 1A, and a plurality of fluid pipe lines 1A that constitute the fluid pipe line 1A. It is located at the end of the fluid pipe. The fluid pipe 1 is attached with a closing treatment device 2 of the present invention for closing the opening end 1a in a sealing manner. The fluid pipe to which the blockage treatment apparatus 2 of the present invention is attached may be a single pipe as long as it is located at the end of the fluid pipe line, or an on-off valve device or the like constituting the fluid pipe line It may be the end of the member.

  As shown in FIG. 2, the closing treatment device 2 includes a closing member 21 that is fitted on the open end 1 a of the fluid pipe 1 located at the end of the fluid pipe 1 </ b> A, an inner peripheral surface 21 a of the closing member 21, and The seal member 22 is interposed between the outer peripheral surface 1b of the opening end 1a, and the separation preventing member 23 that prevents the closing member 21 from moving in the separation direction from the opening end 1a. Yes.

  As shown in FIG. 2B, the closing member 21 is formed of a side portion 21b having an inner peripheral surface 21a and a bottom portion 21c, and has a substantially U shape in cross section. The end portion of the side portion 21b is provided with a flange portion 21d projecting in the outer diameter direction, and the flange portion 21d has a plurality of through holes 21e extending in the same direction as the fluid pipe 1 in the circumferential direction (8 in this embodiment). Place). In addition, the bottom portion 21c has a central portion that protrudes into the opening end portion 1a in a cross-sectional view, and a small hole that is a communication hole of the present invention that communicates with the inside of the opening end portion 1a at the peripheral portion thereof. 21f and a large hole 21g are formed coaxially with the fluid pipe 1, and plug members 24 and 25 for plugging are respectively attached to the small hole 21f and the large hole 21g in a detachable manner. Since the central portion of the bottom portion 21c is raised in a cross-sectional view toward the inside of the opening end portion 1a, the drag force applied to the bottom portion 21c by the fluid in the fluid conduit 1A can be reduced. In the present embodiment, a small hole 21f is disposed on the upper side of the closing member 21, and a large hole 21g is disposed on the lower side.

  Further, as shown in FIGS. 2 and 3, an annular end sealing member 11 made of an elastic body such as rubber or synthetic resin is fixed to the inner peripheral edge portion of the bottom portion 21 c of the closing member 21. The end sealing member 11 seals the gap in a sealing manner by being narrowed in the gap between the opening end 1a and the opening end face 1c. More specifically, as shown in the enlarged portion of FIG. 3, the end sealing member 11 is constricted by the opening end surface 1 c and the bottom portion 21 c to cover the opening end surface 1 c, and the opening end surface 1 c is the opening end portion. It is not exposed to the fluid in 1a. At this time, the compression allowance for compressing the end sealing member 11 in the gap with the opening end surface 1c is longer than the movement allowance for moving the closing member 21 to be described later in a direction away from the opening end 1a of the fluid pipe 1. It has become.

  Thus, since the end sealing member 11 is confined in the gap between the opening end 1a and the opening end surface 1c, it is preferable that the end sealing member 11 has excellent elastic deformation in the expansion / contraction direction. The end sealing member 11 is not limited to the one provided in the gap with the opening end surface 1c. For example, the sealing member in the gap between the inner peripheral surface 21a of the closing member 21 and the outer peripheral surface 1b of the opening end 1a. It may be provided closer to the opening end 1 a than 22. Further, the end sealing member 11 is not limited to be fixed to the closing member 21, but may be separable from the closing member 21, or may be closed after being attached to the opening end surface 1c of the opening end 1a. It may be pressed against the bottom 21c of the member 21.

  In the present embodiment, the end sealing member 11 has been described as an elastic body that seals the gap with the opening end surface 1c in a sealing manner. However, the present invention is not limited to this. The member may be formed of a porous ceramic or a porous metal having a large number of pores. According to this, since the amount of impurities Yb interfered with the end sealing member and wraps around the seal member is reduced, the pore portion of the end sealing member can carry the contaminant Y, By simply removing the end sealing member carrying the contaminants Y when inspecting the fluid conduit 1A and replacing it with another end sealing member, the vicinity of the opening end 1a can be kept very clean. It is.

  As shown in FIGS. 2 (a) and 2 (b), the separation preventing member 23 is provided at four locations with a push wheel 5 as a separation prevention main body and a circumferential extension on the inner peripheral surface of the push wheel 5 with a predetermined interval therebetween. A concave portion 4 provided, a claw portion 6 accommodated in the concave portion 4, and a pressing bolt 7 that presses the outer peripheral surface of the claw portion 6 are provided. Note that four recesses 4 are provided at predetermined intervals in the circumferential direction, but a predetermined number may be provided.

  The pusher wheel 5 is slightly larger in diameter than the outer peripheral surface 1b of the opening end 1a and is arranged in an annular shape, and is provided with a through hole 28 corresponding to the through hole 21e of the flange 21d. The pusher wheel 5 is connected to the closing member 21 by inserting and tightening the connecting bolt / nut 30 into the hole 28. Further, the pusher wheel 5 is provided with a projecting portion 5a projecting annularly toward the seal member 22, and the opening end 1a of the fluid pipe 1 is sealed when the seal member 22 is pressed by the projecting portion 5a. Is held closed. The pusher wheel 5 is provided as an integral ring in the entire circumferential direction of the outer peripheral surface 1b of the opening end 1a. However, the pusher wheel 5 may be formed into a ring by being divided into a plurality of parts and connected.

  As shown in FIG. 2B and FIG. 3, each claw portion 6 is formed at the front end of the claw portion 6 with the outer peripheral surface pressed against the front end portion of the press bolt 7 when the press bolt 7 is screwed in. The sharp edge 6a bites into the outer peripheral surface 1b of the open end 1a. Furthermore, when the fluid pressure of the fluid flowing through the fluid conduit 1 </ b> A is applied to the bottom 21 c of the closing member 21, when the closing member 21 moves away from the opening end 1 a of the fluid pipe 1, the claw portion 6 It comes to incline toward the end portion 1 a side, and presses the outer peripheral surface of the claw portion 6 against the tip end portion of the pressing bolt 7. As a result, the sharp blade 6a bites deeper into the outer peripheral surface 1b of the opening end 1a, and the closing member 21 is prevented from being detached from the opening end 1a of the fluid pipe 1. ing.

  Although not shown in particular, the separation preventing member has a tapered surface formed in the inner circumferential surface of the concave portion of the push wheel that expands in the separation direction as the push wheel moves in the separation direction. It may be configured such that the sharp blade of the claw bites into the outer peripheral surface of the opening end by sliding along a tapered surface formed on the surface.

  As shown in FIG. 3, the end sealing member 11 is provided on the inner peripheral edge of the bottom 21c of the closing member 21, and is narrowed by the gap between the opening end 1a and the opening end surface 1c, thereby the gap Therefore, the foreign matter Y flowing in the fluid pipe 1A is sealed from the gap between the opening end surface 1c and the bottom 21c, and the outer peripheral surface 1b of the closing member 21 and the outer peripheral surface 1b of the opening end 1a. It is possible to prevent the vicinity of the seal member 22 between the two. Therefore, the sealing function of the sealing member 22 is not hindered, and the state where the open end 1a is closed in a sealed manner is maintained.

  As shown in FIG. 4, when the closing member 21 moves in a direction away from the opening end 1 a of the fluid pipe 1, the end sealing member 11 compressed in the gap with the opening end surface 1 c moves the closing member 21. It will come back elastically following. Further, as described above, the compression allowance in which the end sealing member 11 is compressed is longer than the movement allowance in which the closing member 21 moves in the direction of separating from the opening end 1a of the fluid pipe 1, The state in which the gap between the opening end surface 1c of the opening end 1a and the bottom 21c of the closing member 21 is sealed in a sealed manner is reliably maintained by the end sealing member 11.

  Further, for example, although not particularly shown, when removing the blockage processing device 2 from the open end 1a, first, the on-off valve device 3 shown in FIG. 1 is operated to enter the open end 1a of the fluid pipe 1. The flow path in the fluid conduit 1A is closed so that no fluid flows. Next, the plug members 24 and 25 are removed from the small hole 21f and the large hole 21g, respectively, and the small hole 21f and the large hole 21g are opened. At this time, air can be taken into the open end 1a from the small hole 21f, and the fluid staying in the open end 1a can be discharged to the outside through the large hole 21g. When the fluid is discharged from the open end 1a of the fluid pipe 1 to the outside, the blockage treatment device 2 can be removed from the open end 1a without causing the fluid to overflow from the open end 1a.

  Further, a case will be described in which a predetermined work is performed in the fluid pipe 1 in the vicinity of the open end 1a using a working tool as shown in FIG. In the present embodiment, the working tool will be described as an endoscope 10 for confirming the state in the opening end 1a.

  First, as described above, the fluid is discharged from the open end 1a of the fluid pipe 1 to the outside, and the endoscope 10 is introduced into the open end 1a through the opened large hole 21g. Thereafter, an image of the state in the opening end 1a is acquired by the camera unit 10a of the endoscope 10, and the image data is transmitted to a monitor (not shown) via the camera cable 10b, so that the inside of the opening end 1a is externally transmitted. You will be able to check the status. At this time, it becomes easy to confirm the state in the opening end 1a by illuminating the opening end 1a from the small hole 21f with a lighting device (not shown). The working tool is not limited to the endoscope 10 and may be, for example, a suction device that sucks the foreign matter Y accumulated in the opening end 1a. In addition, the small hole 21f and the large hole 21g are, for example, visually confirmed by the operator without using a special work tool when the end sealing member 11 is attached to the gap between the opening end surface 1c and the closing member 21. You may use as a window for doing.

  As described above, the closure processing device 2 is configured so that the contaminant Y in the fluid pipe 1 is provided in a sealed manner across the gap between the opening end 1a of the fluid pipe 1 and the closure member 21. 11 can reliably prevent intrusion between the outer peripheral surface 1b of the opening end 1a and the inner peripheral surface 21a of the closing member 21, and thus the sealing function of the seal member 22 may be deteriorated. In addition, since the closing member 21 is double-sealed by the end sealing member 11 and the sealing member 22, the sealing performance of the open end 1a can be improved.

  That is, since the fluid does not leak from the closing treatment device 2, the outer peripheral surface 1b of the opening end 1a exposed to the fluid is prevented from being corroded, and the claw in the removal preventing member 23 that prevents the closing member 21 from being removed. The sharp blade 6a of the portion 6 does not bite into the outer peripheral surface 1b of the opening end 1a, and the closing member 21 does not come out of the opening end 1a.

  In addition, since the end sealing member 11 is formed of an elastic body, even if the closing member 21 moves in the disengagement direction, the end sealing member 11 elastically deforms following the movement to open the end portion. Since it can prevent coming off from the clearance gap between the opening end surface 1c of 1a and the closure member 21, the state where the foreign substance Y was prevented from invading can be maintained.

  Further, the end sealing member 11 is narrowly pressed so that the end sealing member 11 covers the opening end surface 1c, and the opening end surface 1c is not exposed to the fluid in the opening end 1a. For example, even when the open end surface 1c of the open end 1a is a cut surface formed by cutting the fluid pipe 1, the open end surface 1c is rust-proof.

  The closing member 21 has a small hole 21f and a large hole 21g communicating with the inside and outside of the opening end 1a. After removing the plug members 24 and 25 from the small hole 21f and the large hole 21g and opening them, a working tool such as the endoscope 10 is introduced into the fluid pipe 1 from the outside through the small hole 21f and the large hole 21g. Predetermined work can be performed.

  Next, a modified example of the blocking processing device will be described. As shown in FIG. 6, an annular groove 12 is formed on the inner peripheral surface 211 a of the side portion 211 b of the closing member 211, and an annular protrusion 12 a is provided in the groove 12. A seal member 221 is accommodated in the concave groove 12, and the seal member 221 can be removed from the concave groove 12 by being narrowly pressed between the protrusion 12 a and the outer peripheral surface 1 b of the opening end 1 a. It is prevented.

  Eight concave portions 4 are provided on the inner peripheral surface 211a of the closing member 211 at a predetermined interval on the fluid conduit 1A side of the concave groove 12 in the closing member 211, and each of the concave portions 4 has a claw portion. 6 is housed.

  As described above, in the closing processing device 52 in the present modification, the separation preventing member in the above embodiment is formed integrally with the closing member. According to this, the closing member 211 is fitted into the opening end 1a, and the sharp blade 6a is bitten into the outer peripheral surface 1b of the opening end 1a by each pressing bolt 7, so that the attachment of the closing processing device 52 is completed. Therefore, it is possible to simplify the mounting operation of the blocking processing device 52.

  Next, a modified example of the end sealing member will be described. As shown in FIG. 7, the end sealing member 111 of this modification is fixed over substantially the entire inner surface of the bottom 211 c of the closing member 211. According to this, even if the opening end 1a is misaligned with respect to the closing member 211, for example, the opening end surface 1c can be kept in contact with the end sealing member 111. While being surely prevented from going around the seal member 221, the state in which the opening end surface 1c is rust-prevented by the end sealing member 111 is maintained.

  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 mode in which the communication holes are provided at the two positions of the small hole 21f and the large hole 21g has been described. However, only one communication hole may be provided, or three or more communication holes may be provided. It may be a thing, or it may not be provided with the communication hole especially.

1, 1 'Fluid pipe 1a Open end 1c Open end face 1A Fluid pipe line 2 Blocking device 3 On-off valve device 10 Endoscope 11 End sealing member 21f Small hole (communication hole)
21g large hole (communication hole)
22 Seal member 23 Detachment prevention member 24, 25 Plug member 52 Closure processing device 111 End seal member 211 Block member 221 Seal member Y Contaminant

Claims (3)

Of the plurality of fluid pipes constituting the fluid pipe line, a closing member that is externally fitted to an opening end portion in which an opening end surface that is a cut surface of a metal fluid pipe located at the end is formed; A sealing member interposed between the peripheral surface and the outer peripheral surface of the fluid pipe, and a claw portion that bites into the outer peripheral surface of the fluid pipe, preventing the closing member from moving in the direction of detachment of the fluid pipe A detachment preventing member, and a clogging treatment device for clogging the open end of the fluid pipe in a sealing manner,
The blocking member holds the contaminants in the fluid pipe that are sandwiched between the blocking member and the opening end surface of the fluid pipe and are clamped by the closing member that is externally fitted in the pipe axis direction of the fluid pipe. An occlusion treatment apparatus provided with an end sealing member for sealing.   The closure processing apparatus according to claim 1, wherein the end sealing member is made of an elastically deformable elastic body that covers an opening end surface of the opening end.   3. The blockage processing apparatus according to claim 1, wherein the blocking member includes a communication hole that communicates with the fluid pipe and a plug member that can be attached to and detached from the communication hole.

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