JPS6116842A - Repair technique of synthetic resin pipe - Google Patents

Abstract

PURPOSE:To prevent the remaining of a long-sized pipe on the outside in the radial direction of a synthetic resin pipe after the completion of the repair of the synthetic resin pipe by clogging a working hole for clamping means surrounding and holding the synthetic resin pipe by a plug. CONSTITUTION:A short cylinder section 9 with a working hole 8 is formed integrally to a half-split section 6 as a clamping means 3. A cutting edge 11 for a drilling machine 10 is inserted into the working hole 8 in the short cylinder section 9, a hole 12 is bored to a synthetic resin pipe 2, and a valve means 10a is mounted. A bypass pipe 18 is removed from valve means 10a, 17, the connecting cylinder 9 for the clamping means 3 is surrounded by using a bag body 33, the connecting port 12 for the valve means 10 is removed from the connecting cylinder 9, and a plug 34 is screwed hermetically to the inner screw 8 for the connecting cylinder 9 in place of the connecting port 12. Consequently, a position to be repaired 1 is repaired completely. Accordingly, the working hole for the clamping means is clogged by the plug, thus preventing a projection in long size to the outside in the radial direction of the synthetic resin pipe of the plug.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for repairing synthetic resin pipes for transporting smoke, gas, etc.

In the prior art, a saddle or the like is airtightly fixed to both sides of a synthetic resin pipe made of polyethylene or the like to be repaired, and a branch pipe that communicates with the synthetic resin pipe to be repaired is connected through the saddle. A bypass pipe is connected to the

The branch pipe is made of a synthetic resin pipe. After cutting out the part of the synthetic resin pipe to be repaired and connecting it with a new pipe, the branch pipe is compressed to remove the bypass pipe and the end of the branch pipe is closed. Thereafter, the pressure on the branch pipe is released and the repair is completed. In such prior art, after the repair is completed, a relatively long branch pipe, for example, about 40 cm, remains protruding radially outward from the synthetic resin pipe. Therefore, consideration must be taken to prevent the branch pipe from being damaged by external forces.

An object of the present invention is to provide an improved repair method that prevents a long pipe from remaining radially outward of the synthetic resin pipe after the repair of the synthetic resin pipe is completed.

FIG. 1 is a side view showing a synthetic resin pipe 2 such as polyethylene having a repair point 1 according to an embodiment of the present invention. Such a synthetic resin pipe 2 is buried underground, for example, and is used to transport fluid such as gas.

Clamp means 3.4 for surrounding and clamping the synthetic resin pipe 2 are attached to both sides of the area 1 to be repaired. The clamping means 3 includes a half portion 5 surrounding approximately half the circumference of the synthetic resin pipe 2;
It includes a half part 6 surrounding the remaining half circumference of the synthetic resin pipe 2, and these half parts 5.6 can be fastened together in a direction close to each other with screws or the like. In order to be able to insert the rigid cylindrical body 7 (see FIG. 6) into the synthetic resin pipe 2 as described later, the clamping means 3 is tightened to the extent that the synthetic resin pipe 2 is not deformed. It is held relatively loosely. A short cylindrical portion 9 having a working hole 8 is integrally formed in the half portion 6 of the clamping means 3.

Referring to FIG. 2, the cutting blade 11 of the punching machine 10 is inserted into the working hole 8 of the short cylindrical portion 9, and a hole 12 is punched in the synthetic resin pipe 2. The perforation @io is formed in a roughly T-shape having a cutting blade 11, and by rotating the handle 13, the synthetic resin pipe 2 can be perforated by the cutting blade 11.

After this drilling, the drilling machine 10 is taken out from the short cylindrical part 9, and the third
Install the valve means 10a shown in the figure. This valve means 10
a) S Ujifugu 11 is a connecting tube 1 that is screwed into the working hole 8.
It has 2. (g) An internal thread 13 is cut inside the puffer fish 11, and a valve body 14 is screwed into this internal thread 13 so that it can be displaced up and down. A connecting pipe 15 is formed on the side of the housing 11 . The working hole 8 is closed when the valve body 14 is displaced toward the connecting pipe 12 to close the valve hole 16 as shown in the third figure.

As shown in FIG. 4, a valve means 17 is likewise connected to the other clamp means 4. An end of a bypass pipe 18 is connected to the connecting pipe 15 . Bypass pipe 1
The other end of 8 is connected to valve means 17 .

Then, the valve body 14 of the valve means 10 is rotated and displaced to the position shown by the imaginary line 19 in FIG.

As a result, the valve means 10a becomes open, and the working hole 8 communicates with the connecting pipe 15 and the bypass pipe 18. The same applies to the other valve means 17. In this way, the fluid in the synthetic resin pipe 2 can be branched off to flow through the bypass pipe 18 on both sides of the repair location 1, and interruption of fluid transport can be prevented. A portion of bypass tube 18 may be flexible.

Between the clamping means 3 and 4, the synthetic resin pipe 2 is compressed and crushed by the clamping means 21 and 22 in the vicinity of the clamping means 3 and 4, thereby closing it. The pinching means 21 may have a configuration in which a pair of rollers are displaced toward each other to pinch the synthetic resin pipe 2. Nipping means 21. 22, the synthetic resin pipe 2 is closed, and a portion 23 of the synthetic resin pipe 2 including the repair area 1 is cut out.

Therefore, the rigid cylindrical body 7 shown in FIG. 6 is inserted from the end 2a of the synthetic resin pipe 2 using the pushing means 24 shown in FIG. The pushing means 24 includes a bottomed mounting tube 25 that fits into the end 2a of the synthetic resin pipe 2, and this mounting tube 2.
5 in an airtight manner. A handle 27 is fixed to the push rod 26. push rod 2
6 is pulled out to the outside of the end of the tube 2, the end 2a is surrounded by the mounting cylinder 25, and the mounting cylinder 25 is airtightly attached to the end 2a.
Attach to. Then, the clamping means 21 is loosened and the cylinder 7 is brought to the clamping means 3 by the push rod 26. The push rod 26 is provided with a push rod 26 for easily pushing the cylindrical body 7 into the synthetic resin pipe 2.
It has a pushing piece 29 that extends outward in the radial direction.

The cylindrical body 7 has an outer diameter that fits almost snugly into the synthetic resin tube 2, and has a communication hole 30 that opens radially outward. In the embodiment shown in FIG. 6(1), the cylinder body 7 has a structure in which short cylinders 31 and 32 are connected in the tube axis direction by a connecting rod 33, and a connecting hole 30 is formed between these short cylinders 31 and 32.
It has a configuration in which

As shown in FIG. 6(2), the cylindrical body 7a of the other embodiment has a right cylindrical shape and is provided with a communicating hole 30a. Another cylindrical body 7b according to the present invention has a plurality of communication holes 30b formed in the peripheral wall in the circumferential direction, as shown in FIG. 6(3). When the cylinder 7 is brought into the position of the clamping means 3 by the pushing means 24, the communicating hole 30.30a.

30b communicates with the working hole 12 and the hole 11 formed in the synthetic resin pipe 2.

With the cylinder 7 inserted into the clamping means 3, the pushing rod 26 of the pushing means 24 is pushed into the tube end 2a as shown in FIG.
pull it to the side. Thereupon, the synthetic resin pipe 2 is compressed by the clamping means 21 and closed again. After that, the pushing means 2
4. Remove the mounting tube 25 from the tube end 2a. In this state,
The tube 2 is firmly clamped by the clamping means 3. Due to the action of the cylindrical body 7, the synthetic resin pipe 2 will not be deformed or crushed when it is strongly tightened by the clamping means 3. Such a process is similar for the other clamping means 4 as well. In this way, as shown in FIG. 8, the end portion 2a of the synthetic resin pipe 2,
The pipe bodies 29 are connected over 25 parts.

FIG. 9 is a sectional view showing a connection structure between the end portion 2a of the synthetic resin pipe 2 and the pipe body 29. The tube body 29 is made of steel or the like, and its end portion 2a is inserted into a large diameter portion 30, and a sealing member 31 made of rubber or the like is attached to the inner side of the tube shaft (see FIG. (to the right of). As a result, the sealing member 31 is connected to the inner circumferential surface of the large diameter portion 30 and the end portion 2.
Airtightness is achieved between the outer circumferential surface of a. In this way, the tube body 29 is hermetically connected to the ends 2a and 2b.

Therefore, the pinching means 21. 22 is removed to unblock the synthetic resin pipe 2. In this way, the synthetic resin pipe 2 becomes capable of transporting fluid via the pipe body 29.

Therefore, the valve hole 16 is closed by the valve body 14 of the valve means 10 as shown in FIG. 3 to bring the valve into a closed state. The same applies to the other valve means 17. Subsequently, the bypass pipe 18 is removed from the valve means 10a, 17. Therefore, the first
As shown in FIG.
surrounding the connection tube 9 of the valve means 10 and connecting the connection tube 9 with the connection port 12 of the valve means 10.
In its place, the plug 34 is hermetically screwed into the internal thread 8 of the connecting tube 9. This means that another valve means 1
7 and the clamping means 4 as well. In this way, the repair of repair area 1 is completed.

In the clamping means 10, in order to prevent fluid from leaking near the connecting hole 11 between the inner peripheral surface of the half portion 6 and the outer peripheral surface of the synthetic resin pipe 2, an O-ring 35 surrounding the connecting hole 11 is provided. may be provided.

According to the above-described embodiment, there is no need for special equipment to connect the synthetic resin pipes 2 to each other, and the repair area 1 can be repaired airtight using the pipe body 29, making the repair easy. In addition, various work tools are not required for fusing the synthetic resin pipes, and therefore, various repair points 1 can be easily repaired. Further, since such repair work is simple, the work time can be shortened. .

After inserting the cylindrical body 7 into the synthetic resin pipe 2, the synthetic resin pipe 2 is firmly tightened by the clamping means 3, so that the outer circumferential surface of the synthetic resin pipe 2 and the inner part of the half portion 4 are removed from the hole formed in the pipe. It is possible to improve airtightness with the surrounding surface. Such work may be performed after the ends 2a and 2b of the synthetic resin pipe 2 are connected by the pipe body 29.

As described above, according to the present invention, the working hole of the clamping means surrounding the synthetic resin pipe is blocked by the plug, so that the plug does not protrude outward in the radial direction of the synthetic resin pipe for a long time.

[Brief explanation of drawings]

Fig. 1 is a side view showing the clamping means 3.4 attached to a synthetic resin pipe 2 having a portion 1 to be repaired, Fig. 2 is a cross-sectional view of the clamping means 3, and Fig. 3 is a cross-sectional view of the valve means 10a. Fig. 4 is a side view showing the state in which the piping tube 18 is attached, and Fig. 5 explains the process of pushing the cylinder body 7 into the synthetic resin tube 2 to the position of the clamping hand p'i3 by the pushing means 24. A cross-sectional view of FIG. 6 shows the cylindrical body 7.7a,
7b is a perspective view, FIG. 7 is a cross-sectional view showing the state in which the pushing means 24 is attached to the end of the synthetic resin pipe 2, and FIG. A side view showing the state, FIG. 9 is taken along the section line I! of FIG. 8. - It is a sectional view seen from [. 1... Repair area, 2... Synthetic resin pipe, 3, 4...
Clamp means? , 7a, 7b...Cylinder body, 8...Working hole, 9...Connecting tube, 10...Drilling machine, 11...
Perforating blade, 12... Communication hole, 17... Valve means, 18.
・・Pipe tube, 21.22・Press means, 24・・
・Pushing means, 29... Management agent Patent attorney Kei Nishi - Department 1 @

Claims (1)

[Claims] Clamp means for surrounding and clamping the synthetic resin pipe are attached to both sides of the part of the synthetic resin pipe to be repaired, and the clamping means is formed with a working hole extending toward the synthetic resin pipe. Then, a connecting hole is drilled in the synthetic resin pipe along the working hole, the drilled connecting hole is connected with a bypass pipe, the part of the synthetic resin pipe to be repaired is cut out, and the area is surrounded by a clamping means. A rigid cylindrical body is inserted into the part of the synthetic resin pipe that is cut out, and a communication hole that communicates with the working hole is formed in this cylindrical body, and the part of the synthetic resin pipe that has been cut out is connected by the pipe body. A method for repairing a synthetic resin pipe, characterized in that the bypass pipe is removed while the synthetic resin pipe is tightened from the outside of the cylindrical body by a clamping means, and the working hole is plugged with a plug.