JPS5940088A - Method of repairing pipe joint section - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

The present invention relates to a method for repairing pipe joints in existing pipes such as water pipes and gas pipes. The linen of the joint (which sealing material turns into fine dust and gets into the gas)

[-2] It may scatter and cause gas leakage. When repairing the inner surface of an existing pipe and repairing the pipe joint part, the above-mentioned sealing material part is impregnated with a low-viscosity resin from the chikuuchi side and assimilated. It is proposed to increase the tightness (increase the sill level) while reinforcing the pipe. Fill the spaces between the vigs with a penetrant, pass this through the existing structure, apply air pressure to the outside of the beard, and l
In this case, the problem is that there are branch pipes everywhere in the existing pipe. When the branch pipe is moved, the penetrating agent enters the branch pipe and blocks it. It is necessary to take troublesome measures such as applying atmospheric pressure from the branch pipe side to prevent penetration of penetrant. Based on this, when moving the Vig, avoid the infiltration of the penetrant into the branch pipe by avoiding the intrusion between the Vig. In the first part, air was added from the outside of the seal to increase the internal pressure between the seals, and the penetrant was impregnated for 1 minute to increase the sealing effect.゛U4L: l, / ↑ t + ii fNyj at the bottom of the 1st joint
There is 7 of 1) which is 1). To this end, the present invention proposes that the inner wall (
, - A state in which the penetrating agent is filled between the I-marked bigs in an air-tight manner with the IJ- −】−B 4″1ξ is configured to move in the father pipe.
"r t(11cho7i1! KaIi'/Oki1ru II
MI area (-1) By applying air pressure from the outside of both pigs above/J days, turn the inside L between both pigs upwards,
It is particularly noted that the material is impregnated with an 18C penetrant.Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. Icf"l" (i 1 Jj, J
, 2 (, L, consisting of a bullet M body with a hollow interior)::
:It(Yes, l!V, When inserted into ijJ tube 3,
There is an airtight seal on the inner wall (, one that touches two C and moves (-). 1-
Recorded both big 1a, Yu, j, Hi 2i, L, continuous low 14 and linked to phase n (also on the outside of both jigu 1d3.J: and 2, for mold) -J J, and 6 are connected.And, when inserting the big into the existing pipe 3, 11yl of low viscosity penetrant △ such as J, boxy resin etc. is filled between both big I Jj and 2 of L. This penetrating agent A
The filling amount is 4 for the opposing volume between the pipes 1 and 2, so that there is a space above the inner wall of the pipe. In addition, the existing pipe 3 is constructed so that air pressure PO can be applied to the outside of the bigs 1, d3 and 2. For this purpose, the end of the existing pipe 3 in the area where the inner surface is to be repaired is left open, and the pressure nozzle supply pipe 7 is connected to the open end of the existing pipe 3 and covered. Thus, compressed gas (condensed air) is supplied to the pressure supply pipe 7 from the konbu 1 knot () 9 via the pressure regulating valve 8. Also, separately take the exhaust valve 10. Thus, when moving the pigs 1 d3 and 2 within the existing pipe 3, a suitable stage 11, such as a winch, is used to pull one of the tows I:1-115, for example. At this time,
Do not add Qi J]- to both sides of Big 1d3 and 2. Therefore, no pressure is applied to the penetrant A filled between the bigs 1 and 2, so even if it passes through the branch pipe 12, as shown in Fig. 1, the penetrant will not enter the branch pipe 11 side. , there is no cover to block this. In addition, due to the traction of the VIG, the pipe joint part 13 is
3 and 2, the traction rope 5 is pulled at the 11th point, and the compressed gas compressed by the compressor 9 is compressed into the existing pipe 3 described in -1. As a result, as shown in Figure 2 (Ko, Big 163
Yo'Cf2 (7) Niha Ki on both sides 1. ．． F, Po
When the pipes are tall, Vig 1J3 and 2 are brought close to each other, and the immersion agent A filled in the middle is applied with the required pressure.
C is forcibly impregnated with respect to 1/l of the seal. After the site has been impregnated, open the exhaust valve 9, remove j1 of the existing chiku 3 in C1, and tow again [1-15 and move Big 4 J> Yohi 2. It is. After completing the repair of each pipe joint 1 in the required area of the existing pipe through this series of operations, if necessary, apply 1=jL, 1-boxy resin, etc. to the inner surface of the existing pipe 3. 1. Apply the coating agent. ” - forms a ding layer. In this case, since the sealing material is impregnated with the penetrating agent, its density is increased by 1.1, and close integration with the sealing layer is achieved. As described above, according to the present invention, when moving the vig,
The inside between the pigs is lowered to prevent penetrant from entering into the u-C branch 71, and at the pipe joint Jj, air pressure is applied from the outside of the pig to raise the inside L1 between the pigs and to prevent the penetrant from entering the pipe joint. Since it is impregnated into the sealing material, it prevents the penetrant from entering the branch pipe when the VIG is moved, and there is no need to apply pressure from the branch pipe side. , The sealing material is impregnated with -C penetrant to increase the density and strength of the sealing material, resulting in a high sealing effect, and for subsequent coating on the inside surface of the existing color.1],]-]1-ding In carrying out the present invention, when moving the bigs 1 and 2, in addition to the traction by [''-15 or 6], The suction action of the low angle L is also good (゛C is also good, and if it is set like this, there will be no compression action between the bigs 1 and 2 when moving, so the inside L1 between both pigs will be more reliable.) , it also ensures the movement of the big.

[Brief explanation of the drawing]

It is. 1. 2...Pig, 3...1 branch" 9 qualities, 4...i!
I! Connecting 11-/, 5, (3... Towing 1 Coop, l...
・Ih supply pipe, 8...Moon-force adjustment valve, 9...:I inlet, 10...II)r, 11...Winch, 12...Branch pipe, 13...Pipe Joint part, 14... Seal shrine. Patent Applicant Kabugo (Trial H1-Representative Patent Attorney Nobuyuki Kobashi)

Claims (1)

[Claims] A pair of VIGs that are in airtight contact with the inner wall of the existing pipe are connected with 1]-B, a penetrant is filled between the VIGs, and the pipe is inserted into the pipe body in the state of 1Z:, and Tow 1-l
When moving inside the existing pipe, the internal pressure between the two pipes is reduced, and at the point where the joint is located between the two pipes, the air pressure is applied from the outside of both pipes. A method for repairing a pipe joint, which comprises impregnating the sealing material of the pipe joint with the penetrant.