JP2022147200A - Piping sealing jig - Google Patents

Abstract

To provide a piping sealing jig that can be attached to an opening of a pipe member with simple work and certainly seal the pipe member.SOLUTION: A piping sealing jig comprises a pair of end faces 12a, 12b; and a main body 12 that has an outside face 12c continuing from the pair of end faces 12a, 12b, and comprises attachment recesses 14, 22 that are fitted to and close an end 1a of a pipe member 1 at the center parts of the end faces 12a, 12b. The attachment recesses 14, 22 have a cylindrical shape and have parallel female screws 16, 24 at positions on inner peripheral surfaces of the recesses 14, 22 and close to the end faces 12a, 12b. Large diameter parts 18, 26 continuing from the parallel female screws 16, 24 are formed at positions deeper than the parallel female screws 16, 24. The large diameter parts 18, 26 include packings 20, 28 that are in pressure contact in an axial direction with the end 1a of the pipe member 1. The main body 12 has an insertion hole 30 penetrating the outside face 12c and includes a rod-like handle 32 slidably in the insertion hole 30. The handle 32 is longer than the insertion hole 30 and has flange parts 34 at both ends of the handle 32.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe sealing jig that is attached to a pipe opening provided in a tank to seal the opening when inspecting leaks in a tank or pipe buried underground.

2. Description of the Related Art Conventionally, leak inspections of underground tanks installed at gas stations, for example, are conducted with the inside of the tanks sealed. Therefore, it is necessary to attach a lid to seal the ventilation openings provided in the tank. Furthermore, when performing an internal pressure test, a jig for removing the air in the tank and pumping it is also connected. A pressure gauge or the like used for inspection is also attached to the open pipe.

In such inspections and the like, as a jig for sealing a pipe opening, there is a pipe sealing jig disclosed in Patent Document 1, for example. This pipe sealing jig includes a bolt having a through hole in the longitudinal direction, a cylindrical elastic body that can be inserted into the bolt, and washers that are inserted through the bolt and attached to both ends of the elastic body. . On one side of the washer, there is a bearing that receives a force in the thrust direction, and a tightening nut that is screwed onto the bolt and tightens the elastic body via the bearing. and a socket coupler connected to the other opening of the pipe joint and having a valve therein. The method for using this piping sealing jig is to insert the piping sealing jig so that the outer periphery of the elastic body is inscribed inside the piping when it is attached to the piping. Then, the tightening nut is turned in the tightening direction with a wrench or the like. Then, the elastic body is pressed by the movement of the nut, and the outer periphery expands, and the expanded outer peripheral surface of the elastic body comes into close contact with the inner wall of the pipe, thereby sealing the pipe.

Japanese Unexamined Patent Application Publication No. 2007-183102

In the case of the above-described background art, a tool such as a wrench for turning the tightening nut is required when mounting it on the pipe member, and the work is troublesome. In particular, when working at a high place using a ladder or the like, carrying a wrench and tightening operations with a wrench are dangerous and workability is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the background art described above, and an object of the present invention is to provide a pipe sealing jig that can be easily attached to an opening of a pipe member and that can reliably seal the opening. and

In the present invention, a main body having a pair of end faces and an outer side surface continuous with the pair of end faces is provided, and a mounting recess is formed in the central part of the end face for fitting and closing the end of the pipe member. , the mounting recess has a short cylindrical shape in an axial direction perpendicular to the end face, and a parallel female thread is formed on an inner peripheral surface of the mounting recess at a position near the end face. A large-diameter portion having a diameter larger than the inner diameter of the parallel female thread is formed continuously from the parallel female thread at a deeper position than the parallel female thread. A packing is provided whose end portion is press-contacted in the axial direction, and in the main body, an insertion through the outer surface is provided between the mounting recess and an end surface opposite to the end surface where the mounting recess is provided. A hole is provided, a rod-shaped handle is slidably inserted into the insertion hole, the length of the handle is longer than the insertion hole and protrudes from the outer surface of the main body, It is a pipe sealing jig with flanges provided at both ends of the handle to prevent it from coming off.

The tubular member is provided with a tapered male thread, and the parallel female thread of the pipe sealing jig is screwed into the tapered male thread of the tubular member.

A cushioning material is provided between the flange portion of the handle and the main body. The cushioning material is made of flexible rubber, is provided on the handle, and cushions the collision between the flange portion and the outer surface of the main body when the handle slides.

The pair of end faces of the main body are provided with the mounting recesses of different sizes, the bottoms of the pair of mounting recesses are separated from each other, and the insertion hole is provided between the bottoms. good.

One of the end faces of the main body is provided with the mounting recess, and the other end face is provided with an insertion hole for communicating with another member such as a pressure gauge. A through hole communicating with the mounting recess may be formed in the packing at a position facing the insertion hole.

INDUSTRIAL APPLICABILITY The pipe sealing jig of the present invention can be attached to the opening of the pipe member by a simple operation, and can be reliably sealed. As a result, it is possible to easily attach the sensor to the opening of the pipeline for inspection or the like when closing the inspection port or the ventilation port provided in the underground tank or measuring the internal pressure.

1 is a perspective view of a pipe sealing jig according to a first embodiment of the invention; FIG. 1 is a longitudinal sectional view of a pipe sealing jig according to a first embodiment of the invention; FIG. FIG. 3 is a vertical cross-sectional view taken along the line AA of FIG. 2; FIG. 4 is a vertical cross-sectional view of a pipe sealing jig according to a second embodiment of the invention; It is a bottom view of the main body and packing of the pipe sealing jig of the second embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. A pipe sealing jig 10 of this embodiment has a metal body 12, the material of the body 12 is, for example, aluminum, and the surface is black due to black alumite. The main body 12 has a cylindrical shape and is provided with a pair of parallel circular end faces 12a and 12b and a cylindrical outer side face 12c. For example, the diameter is 60 mm and the height is 55 mm.

A mounting recess 14 for fitting and closing the end portion 1a of the pipe member 1 is formed in the central portion of one end face 12a. The mounting recess 14 is cylindrical with an axis perpendicular to the end surface 12a and relatively short in the axial direction. It is in the shallow position below. A parallel female thread 16 is formed on the inner peripheral surface of the mounting recess 14 in a range of approximately half depth near the end surface 12a. Here, the parallel female thread is a female thread with the same inner diameter up to the tip. A large-diameter portion 18 having a diameter larger than the inner diameter of the parallel female thread 16 is formed in the remaining depth range of the inner peripheral surface that is deeper than the parallel female thread 16 and continues to the bottom portion 14a.

A packing 20 is put in the bottom portion 14 a of the mounting recess 14 . The packing 20 has a circular shape with a thickness substantially equal to the depth of the large-diameter portion 18, is a flexible hard elastic body, and is made of, for example, nitrile rubber. The diameter is larger than the parallel female screw 16 fitted to the large-diameter portion 18 so as not to come off.

A mounting recess 22 for fitting and closing the end portion 1a of the pipe member 1 is also formed in the central portion of the end surface 12b opposite to the end surface 12a. The mounting recess 22 has a size different from that of the mounting recess 14, is cylindrical with a diameter larger than that of the mounting recess 14, and has substantially the same axial length as the mounting recess 14. The bottom 22a of the mounting recess 22 is: It is at a shallow position less than half the axial length of the body 12 . A parallel female thread 24 is formed on the inner peripheral surface of the mounting recess 22 in a range of approximately half depth near the end surface 12b. A large-diameter portion 26 having a diameter larger than the inner diameter of the parallel female thread 24 is formed in the remaining depth range of the inner peripheral surface that is deeper than the parallel female thread 24 and continues to the bottom portion 22a.

A packing 28 is put in the bottom portion 22 a of the mounting recess 22 . The packing 28 has a circular shape with a thickness substantially equal to the depth of the large-diameter portion 26, and is a flexible, hard elastic body made of, for example, nitrile rubber. The diameter is large enough to fit into the large diameter portion 26 and larger than the parallel female thread 24 so that it does not come off.

At the center of the main body 12, between the bottom portion 14a of the mounting recess 14 and the bottom portion 22a of the mounting recess 22, an insertion hole 30 is provided diametrically through the outer surface 12c. A rod-shaped handle 32 is slidably inserted into the insertion hole 30 . The length of the handle 32 is about 2 to 4 times the diameter of the main body 12, for example 165 mm, which is 3 times the diameter of the main body 12. At both ends of the handle 32, flanges 34 are provided to prevent it from coming off. It is A ring-shaped cushioning material 35 is inserted through the handle 32 . The cushioning material 35 is made of flexible rubber and is provided in close contact with the handle 32 to prevent the flange portion 34 from colliding with the outer surface 12c of the main body 12 when the handle 32 slides. The handle 32 can grip the portion protruding from the insertion hole 30 to rotate the main body 12 around the axis.

A tapered external thread 1b is formed on the outer peripheral surface of the end portion 1a of the tubular member 1. As shown in FIG. Here, the tapered male thread is a male thread formed with a taper in which the outer diameter becomes smaller toward the tip, and is relatively often used in parts requiring watertightness and airtightness. The parallel female threads 16 and 24 of the main body 12 are formed to have a size that allows them to be loosely screwed into the tapered male threads 1b of the pipe member 1 with relatively large play. For example, the mounting recess 14 is for closing a general pipe member with an outer diameter of 32 mm, and the mounting recess 22 is for closing a pipe member with an outer diameter of 40 mm. 40mm tubing or 40mm tubing can be selectively closed. The target pipe diameter may be 32 mm, 40 mm, 50 mm, or other sizes. The packings 20 and 28 are appropriately sized according to the size of the mounting recess, and can be replaced if damaged during use.

Next, a method for using the pipe sealing jig 10 of this embodiment will be described. For example, when sealing the end portion 1a of the pipe member 1 of a pipe leading to a storage tank or the like, the end portion 1a of the pipe member 1 is fitted into the mounting recess 22, the handle 32 protruding from the main body 12 is grasped, and the main body is 12 is rotated around its axis, and the parallel female screw 24 is screwed into the tapered male screw 1b of the tube member 1 and attached. The number of rotations of the main body 12 is, for example, about three. The handle 32 is slidable in the insertion hole 30, and preferably protrudes in a direction that is easy to grip. Since the parallel female thread 24 is loosely formed with respect to the tapered male thread 1b and has a large amount of play, the end portion 1a of the pipe member 1 penetrates deeply into the packing 28 in the axial direction with a strong force, thereby reliably It is hermetically sealed and relatively easy to tighten. The sealing pressure can be set to ±30 kPa or more, for example. In operation, the end faces 12a and 12b of the main body 12 are selected according to the size of the pipe member 1, the pipe member 1 is attached to either of the mounting recesses 14 and 22, and sealed, and various inspections of the piping are performed. When the inspection is completed and it becomes unnecessary, the handle 32 is rotated in the opposite direction to release the taper male screw 1b and the parallel female screw 24 of the pipe member 1 and remove them.

According to the pipe sealing jig 10 of this embodiment, it can be attached to the opening of the pipe member 1 by a simple operation, and can be reliably sealed. It can be easily attached to the opening of the pipeline for inspection, etc., when closing the inspection port or ventilation port provided in the underground tank or measuring the internal pressure. Installation is as simple as holding the handle 32 and rotating the body 12 without the need for tools. Since the handle 32 is provided with flanges 34 at both ends, the handle 32 does not come off from the insertion hole 30.例文帳に追加In addition, since the cushioning material 35 is inserted between the flange portion 34 and the main body 12 and attached, the flange portion 34 does not collide with the main body 12 and can be turned lightly, so that it can be easily tightened. is easy and can be easily mounted in a sealed state. Moreover, the pipe sealing jig 10 alone can be used for pipe members 1 of two sizes, and the number of pipe sealing jigs 10 corresponding to the diameter of the pipe can be reduced.

Next, a second embodiment of the invention will be described with reference to FIGS. 4 and 5. FIG. Here, members similar to those of the above-described embodiment are denoted by similar reference numerals, and descriptions thereof are omitted. The pipe sealing jig 36 of this embodiment has a metal body 12, the material of the body 12 is, for example, aluminum, and the surface is black alumite. The main body 12 has a cylindrical shape and is provided with a pair of circular end faces 12a and 12b parallel to each other and an outer side face 12c formed of a curved surface.

A mounting recess 22 for fitting and closing the end 1a of the pipe member 1 is formed in the central portion of the end face 12b. A parallel female thread 24 and a large-diameter portion 26 are formed on the inner peripheral surface of the mounting recess 22, and a packing 38 is placed in the bottom portion 22a. The packing 38 is a ring-shaped packing having a thickness approximately equal to the depth of the large-diameter portion 26 and having a circular through hole 40 formed in the center. . The outer diameter is larger than the parallel female screw 16 fitted to the large diameter portion 18 so that it does not come off. The diameter of the through-hole 40 is smaller than the inner diameter of the pipe member 1, and the packing 38 abuts against the end portion 1a of the pipe member 1. The through-hole 40 is connected to a first insertion hole 42 and a second insertion hole 46, which will be described later. are communicated with each other, and the first insertion hole 42 and the second insertion hole 46 are sized to communicate with the mounting recess 22 .

An insertion hole 30 is provided in the center of the main body 12 between the end surface 12a and the bottom portion 22a of the mounting recess 22 . A rod-shaped handle 32 is inserted through the insertion hole 30 . A flange portion 34 is provided at both ends of the handle 32 to prevent it from coming off, and a ring-shaped cushioning material 35 is inserted through the handle 32 .

A first insertion hole 42 communicating with the bottom portion 22a of the mounting recess 22 is provided in the end surface 12a. The first insertion hole 42 has a cylindrical shape perpendicular to the end surface 12 a and is provided at a position that avoids the center of the end surface 12 a and does not communicate with the insertion hole 30 . A female screw 44 is formed on the inner peripheral surface of the first insertion hole 42 in a range of about one-third of the depth near the end surface 12a. The internal diameter of the female screw 44 is slightly larger than the other internal diameters of the first insertion hole 42 . The end surface 12a is provided with a second insertion hole 46 parallel to the insertion direction of the first insertion hole 42 and communicating with the bottom portion 22a of the mounting recess 22 on the diameter where the first insertion hole 42 is located. The second insertion hole 46 is provided at a position that avoids the center of the end face 12 a and does not communicate with the insertion hole 30 , and is located on the opposite side of the insertion hole 30 from the first insertion hole 42 . A female screw 48 is formed in the inner peripheral surface of the second insertion hole 46 in a depth range of about one-third near the end surface 12a.

A male screw portion of a valve 52 having a lever 50 that can be opened and closed is attached to the first insertion hole 42 by being screwed into the female screw 44 . A plug coupler 54 is screwed and attached to the pipe connection port of the valve 52 on the side opposite to the first insertion hole 42 . A male screw portion of an L-shaped pipe joint 56 is screwed into a female screw 48 and attached to the second insertion hole 46 . A socket coupler 58 is screwed and attached to the tube connection port on the opposite side of the second insertion hole 46 of the L-shaped tube joint 56 . Since the first insertion hole 42 and the second insertion hole 46 communicate with the through hole 40 of the packing 38, the valve 52 and the L-shaped pipe joint 56 communicate with the mounting recess 22, that is, with the end face 12b of the main body 12. do.

The parallel female thread 24 of the main body 12 is formed in a size that is loosely screwed onto the tapered male thread 1b of the tubular member 1 . For example, it closes a tube member 1 with an outer diameter of 40 mm or 50 mm, but other sizes are also possible. Female thread 44 and female thread 48 are appropriately set according to valve 52 or L-shaped pipe joint 56 to be attached.

Next, a method for using the piping sealing jig 36 of this embodiment will be described. First, with the valve 52 and the L-shaped pipe joint 56 attached to the main body 12, the end portion 1a of the pipe member 1 is inserted into the mounting recess 22, and the handle 32 protruding from the main body 12 is grasped to rotate the main body 12 as an axis. The pipe member 1 is rotated around, and the parallel female screw 24 is screwed into the tapered male screw 1b of the pipe member 1 to attach it. A hose or the like extending from a compressor or vacuum pump (not shown) is connected to the plug coupler 54 . A pressure gauge (not shown) is connected to the socket coupler 58 . This makes it possible to measure the pressure inside the tank. When the inspection is completed and it becomes unnecessary, the handle 32 is rotated in the opposite direction to release the taper male screw 1b and the parallel female screw 24 of the pipe member 1 and remove them. The work procedure may be different from the above. For example, before attaching the valve 52 and the L-shaped pipe joint 56 to the main body 12, the main body 12 is mounted on the pipe member 1, and then the valve 52 and the L-shaped pipe joint 56 are mounted. good too.

The piping sealing jig 36 of this embodiment has the same effects as those of the above embodiment. The valve 52 and the L-shaped pipe joint 56 can be reliably and airtightly attached to the pipe member 1 .

The pipe sealing jig of the present invention is not limited to the above embodiments, and the shape, size and material of each member can be changed as appropriate. It suffices that an attachment inner portion is formed in which the end portion of the member can be fitted. Also, the pipe member may be connected to a member other than the valve and the L-shaped pipe joint.

1 pipe member 1a end 1b tapered male thread 10 pipe sealing jig 12 main body 12a, 12b end surface 12c outer surface 14, 22 mounting recess 14a, 22a bottom 16, 24 parallel female screw 18, 26 large diameter portion 20, 28, 38 Packing 30 Insertion hole 32 Handle 34 Flange 35 Cushioning material 40 Through hole 42 First insertion hole 46 Second insertion hole

Claims (5)

A main body having a pair of end faces and an outer side surface continuous with the pair of end faces is provided, and a mounting recess for fitting and closing the end of the pipe member is formed in the center part of the end face,
The mounting recess has a short cylindrical shape in the axial direction perpendicular to the end face, and a parallel female thread is formed on the inner peripheral surface of the mounting recess at a position near the end face. At the deepest position, a large-diameter portion having a diameter larger than the inner diameter of the parallel female thread is formed continuously from the parallel female thread,
The large-diameter portion of the mounting recess is provided with a packing with which the end portion of the pipe member is pressed in the axial direction,
The main body is provided with an insertion hole passing through the outer side surface between the mounting recess and an end surface on the opposite side of the end surface where the mounting recess is provided. A handle is inserted slidably, the length of the handle is longer than the insertion hole and protrudes from the outer surface of the main body, and flanges are provided at both ends of the handle to prevent it from coming off. A piping sealing jig characterized by being 2. The pipe sealing jig according to claim 1, wherein said pipe member is provided with a tapered male thread, and said parallel female thread of said pipe sealing jig is screwed into said tapered male thread of said pipe member. 2. The piping sealing jig according to claim 1, wherein a cushioning material is provided between said flange portion of said handle and said main body. The pair of end faces of the main body are provided with the mounting recesses of different sizes, the bottoms of the pair of mounting recesses are separated from each other, and the insertion hole is provided between the bottoms. 3. A pipe sealing jig according to item 1 or 2. One of the end faces of the main body is provided with the mounting recess, and the other end face is provided with an insertion hole that communicates with and attaches to another member, and the insertion hole communicates with the bottom of the mounting recess. 3. The piping sealing jig according to claim 1, wherein the packing has a through hole communicating with the mounting recess at a position facing the insertion hole.

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