JPH0768640A - Branch tube lining material - Google Patents

Abstract

PURPOSE:To provide a branch tube lining material which can simultaneously line a branch tube in which water is penetrated and cut-off water. CONSTITUTION:A branch tube lining material 1 comprises a two-layer structure of a cured liner (tube lining layer) 2 having a collar 2a and impregnated with a curable resin, and a water cut-off liner (water cut-off agent impregnating layer) 3 impregnated with water cut-off agent. When the material 1 is used to repair a branch tube in which water is penetrated, penetration of water is prevented by the agent impregnated to the liner 3 of the material, and simultaneously the tube is lined with the liner 2 thereby to improve an operating efficiency and to shorten a term.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch pipe lining material used for repairing an aged branch pipe.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the ground is deteriorated, the pipeline is repaired by lining the circumferential surface of the pipeline without excavating the pipeline from the ground. The pipe repair method is already known.

That is, in the above-mentioned pipe repairing method, a pipe lining material impregnated with a curable resin is inserted into the pipe while being inverted by a fluid pressure, and is pressed against the inner peripheral surface of the pipe to keep the state. While the above is maintained, the pipe lining material is heated to cure the curable resin impregnated therein, thereby lining the inner peripheral surface of the pipe line.

By the way, such a pipeline repairing method can be applied not only to the main pipe but also to a branch pipe branched from the main pipe.

[0005]

However, especially in branch pipes such as sewer pipes, there is infiltration of groundwater and the like, and when the pipe repairing method is applied to such branch pipes as they are, the pipe lining material is impregnated. There is a problem that the curable resin comes into contact with the infiltrated water and does not need to be cured.

Therefore, before applying the pipe repairing method to a branch pipe with infiltrated water, it is necessary to perform a water-stop treatment for preventing the intrusion of water into the branch pipe. The burden was heavy and the construction period was long.

The present invention has been made in view of the above problems, and an object thereof is to provide a branch pipe lining material capable of simultaneously performing a lining process and a water stopping process for a branch pipe having infiltration water. Especially.

[0008]

To achieve the above object, the present invention provides a pipe lining material, a pipe lining layer having a collar at one end and impregnated with a curable resin, and a water blocking agent. It is characterized by having a two-layer structure with a water-stopping agent impregnated layer.

[0009]

When the branch pipe lining material according to the present invention is applied to repair a branch pipe with infiltrated water, the infiltration of the infiltration water is prevented by the water blocking agent impregnated in the water blocking agent impregnated layer of the branch pipe lining material. At the same time, the pipe lining layer lining the branch pipes can improve the work efficiency and shorten the construction period.

[0010]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing a set state of a branch pipe lining material according to the present invention, FIG. 2 is an enlarged sectional view taken along the line AA of FIG. 1, and FIGS. 3 (a) to 3 (c) are related to the present invention. It is sectional drawing which shows a part of manufacturing process of a branch pipe lining material.

As shown in FIG. 1, a branch pipe lining material 1 according to the present invention is obtained by impregnating a pipe lining layer (hereinafter referred to as a cured liner) 2 impregnated with a thermosetting resin and a water blocking agent. The water-stopping agent-impregnated layer (hereinafter referred to as a water-stopper liner) 3 is formed into a two-layer structure. In the non-inverted branch pipe lining material 1, the cured liner 2 constitutes an outer layer and the water blocking liner 3 constitutes an inner layer.

The cured liner 2 has a tubular nonwoven fabric such as polyester, nylon, acryl or vinylon whose outer surface is covered with a highly airtight plastic film 4 and is impregnated with a thermosetting resin such as unsaturated polyester or epoxy resin. The collar 2a is formed as much as possible, and one end thereof is folded back as shown to form the collar 2a. The curable resin with which the collar 2a is impregnated has been cured in advance, so that the collar 2a retains a predetermined shape (an arc curved surface shape along the inner wall shape of the main pipe).

On the other hand, the waterproof liner 3 is made of the same tubular non-woven fabric as described above with hydrophilic polyurethane, acrylamide,
It is constructed by impregnating a water blocking agent such as silicon, and the water blocking liner 3 and the cured liner 2 are separated by a plastic film 5 interposed therebetween (FIG. 2).
reference). As the plastic films 4 and 5, polyethylene, vinyl chloride, vinylon, polyurethane, nylon, polypropylene, polyethylene-nylon copolymer films and the like are used.

Here, a part of the manufacturing process of the branch pipe lining material 1, that is, the process of setting the water blocking liner 3 on the cured liner 2 will be described with reference to FIGS. 3 (a) to 3 (c).

As shown in FIG. 3 (a), the cured liner 2 not yet impregnated with the thermosetting resin is suspended with the collar 2a facing upward, and the waterproof liner 3 impregnated with the waterproofing agent in advance is cured. The liner 2 is erected above the collar 2a. A plastic film 5 is previously coated on the inner peripheral surface of the water blocking liner 3. The upper end of the peeling tube 6 is temporarily adhered to the outer peripheral portion of the cured liner 2 below the brim 2a.

Then, as shown in FIG. 3A, when the thermosetting resin 7 is injected into the water blocking liner 3 provided upright, the tubular nonwoven fabric of the cured liner 2 is evacuated by the vacuum pump 8. The tubular nonwoven fabric of the cured liner 2 is impregnated with the thermosetting resin 7.

Next, as shown in FIG. 3 (b), the reverse push-in tube 9 is passed through the outer side of the water stop liner 3, and the reverse push-in tube 9 and a part of the water stop liner 3 are folded back as shown. Push these into the cured liner 2,
Water is injected into the folded portion from the injection hose 10.
Then, the waterproof liner 3 is inserted downward while reversing the inside of the hardening liner 2 together with the reversing push-in tube 9 by the pressure of water (self-weight).

Then, as shown in FIG. 3 (c), when the reverse insertion of the water blocking liner 3 and the reverse pushing tube 9 into the hardened liner 2 is completed, the reverse pushing tube 9 is pulled upward, and the reverse pushing tube is pulled up. 9 is reversed and pulled out from the water blocking liner 3. Then, the ring-shaped nonwoven fabric 11 impregnated with the water blocking agent is adhered onto the brim 2a of the cured liner 2.

Thus, in the branch pipe lining material 1, as shown in FIG. 1, the folded flange 2a is set on the flange 12a of the nozzle 12, and the remaining non-inverted portion is downward from the nozzle 12. And is stored in the pressure bag 13.

One end of the pressure bag 13 is attached to the outer periphery of the cylindrical connecting member 14, the other end (not shown) is closed, and a compressor (not shown) is connected to the pressure bag 13.

The open end of the peeling tube 6 and one end of the guide tube 15 are attached to the outer peripheral portion of the connecting member 14 so as to overlap each other, and the other end of the guide tube 15 is a cylindrical portion of the nozzle 12. It is attached to the outer circumference of 12b.

Further, a plastic film 16 having high airtightness similar to the above is adhered on the brim 2a of the hardened liner 2 by an adhesive, and until the branch pipe lining material 1 starts to be inverted. Water liner 3 between
The non-woven fabric 11 is protected from water by the plastic film 16.

Next, a branch pipe lining method using the branch pipe lining material 1 according to the present invention will be described with reference to FIGS. 4 to 7. 4 to 7 are sectional views showing the branch pipe lining method in the order of steps.

In FIG. 4, 20 is a main pipe and 21 is a main pipe 2.
A branch pipe with a small diameter that branches from 0, and a robot 22 and a branch pipe lining material 1 set as shown in FIG. 1 are introduced into the main pipe 20.

The robot 22 is hydraulically driven so that its head 23 moves back and forth in the direction of arrow a in FIG.
The nozzle 12 is mounted on the head 23 and rotates in the direction. A tow rope 24 is connected to the robot 22, and a TV camera 25 for monitoring and a light 26 for illumination are attached to the upper part of the rope 22.

By pulling the tow rope 24, the robot 22 and the branch pipe lining 1, the pressure bag 14 and the like supported by the robot 22 move integrally within the main pipe 20, but are monitored by the TV camera 25. However, as shown in FIG. 4, the brim 2a portion of the branch pipe lining material 1 is positioned in the opening of the branch pipe 21, and the head 2 of the robot 22 is positioned.
3 is moved upward to move the collar 2a of the branch pipe lining material 1 into the main pipe 20.
Press the inner wall of the to make it adhere.

Next, when a compressor (not shown) is driven to supply compressed air into the pressure bag 14, the branch pipe lining material 1 receives the pressure of the compressed air and inverts the branch pipe 21 from the main pipe 20 to the inside thereof. Although it is inserted toward the ground side (upward), when the inversion of the branch pipe lining material 1 is started, the plastic film 16 covering the brim 2a portion thereof is inverted by the inversion force of the branch pipe lining material 1. Torn off. Further, when the branch pipe lining material 1 is inverted, the water blocking liner 3 forms an outer layer and is brought into close contact with the inner wall of the branch pipe 21, so that there is a case where groundwater enters from a cracked portion of the branch pipe 21 or the like. Also, when the groundwater touches the water blocking agent impregnated in the water blocking liner 3, the water blocking agent reacts and hardens, so that the ground water reaches the hardening liner 2 and the thermal hardening impregnated in the hardening liner 2 is performed. Does not come into contact with the resin. Since the non-woven fabric 11 attached to the brim 2a of the hardened liner 2 is also impregnated with the water blocking agent, the water blocking effect of the non-woven fabric 11 prevents the infiltration of groundwater into the main pipe 20.

When the inversion insertion of the branch pipe lining material 1 into the branch pipe 21 is completed, the cup 27 is attached to the upper end of the branch pipe lining material 1 and the compressor 28 is driven as shown in FIG. To supply compressed air into the branch pipe lining material 1 via the air hose 29. Then, the branch pipe lining material 1 is expanded by the pressure of the compressed air and pressed against the circumferential wall of the branch pipe 21. A pressure gauge 30 and a safety valve 31 are attached to the cup 27.

Next, while maintaining the above state, hot water is supplied from the hot water supply hose 32 introduced into the branch pipe lining material 1 into the branch pipe lining material 1, and hot water is supplied from the drainage hose 33 to the branch pipe lining. When the work of discharging the material 1 to the outside is repeated, the thermosetting resin impregnated in the curing liner 2 is heated and cured by warm water, and the branch pipe 21 has its inner peripheral surface covered by the cured branch pipe lining material 1. Lined.
At this time, even if groundwater enters the branch pipe 21, the water-blocking liner 3 prevents contact of the groundwater with the thermosetting resin due to the water-blocking effect, so that the thermosetting resin is reliably cured. However, there is no partial curing failure.

When the branch pipe 21 is lined as described above, the warm water in the branch pipe lining material 1 is drained, and the robot 22 moves in the direction of the arrow c in the drawing (on the right side of FIG. 6) as shown in FIG.
Be attracted to. Then, the nozzle 12, the guide tube 15, the pressure bag 14, etc. supported by the robot 22 move integrally in the same direction together with the robot 22, and the peeling tube 6 temporarily bonded to the branch pipe lining material 1 is temporarily bonded. It is peeled off from the portion and moves in the main pipe 20 together with the robot 22 and the like.

Then, the robot 22, nozzle 12,
When the tear-off tube 6 and the like are removed from the main tube 20, FIG.
As shown in FIG. 3, only the hardened branch pipe lining material 1 remains in the branch pipe 21, and the branch pipe 21 is lined and repaired by the branch pipe lining material 1, and a series of repair work is completed here.

As described above, when the branch pipe lining material 1 according to the present invention is applied to the repair of the branch pipe 21 with the infiltrated water, the water stop liner 3 of the branch pipe lining material 1 prevents the infiltration of the infiltrated water. At the same time, since the branch liner 21 is lined with the cured liner 2, the work efficiency is improved, which shortens the construction period.

[0034]

As is apparent from the above description, according to the present invention, a branch pipe lining material is impregnated with a pipe lining layer having a collar at one end and impregnated with a curable resin, and a water blocking agent. Since it has a two-layer structure with the water-stopping agent-impregnated layer, the effect that the lining and the water-stopping treatment can be simultaneously performed on the branch pipe having infiltration water is obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a set state of a branch pipe lining material according to the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

3 (a) to 3 (c) are cross-sectional views showing a part of the manufacturing process of the branch pipe lining material according to the present invention.

FIG. 4 is a cross-sectional view showing a branch pipe lining method using a branch pipe lining material according to the present invention in the order of steps thereof.

FIG. 5 is a cross-sectional view showing a branch pipe lining method using a branch pipe lining material according to the present invention in the order of steps.

FIG. 6 is a cross-sectional view showing a branch pipe lining method using the branch pipe lining material according to the present invention in the order of steps.

FIG. 7 is a cross-sectional view showing a branch pipe lining method using the branch pipe lining material according to the present invention in the order of steps thereof.

[Explanation of symbols]

 1 Branch pipe lining material 2 Cured liner (pipe lining layer) 2a Tsuba 3 Water blocking liner (water impregnating layer) 5 Plastic film 16 Plastic film

Front page continuation (72) Inventor Yasuhiro Yokoshima Yokoshimauchi Co., Ltd. 175-3 Shinoyama, Ishishita-cho, Yuki-gun, Ibaraki Prefecture (72) Inventor Shigeru Endo 1431 Tomita, Iwai-shi, Ibaraki Getta Inc.

Claims (3)

[Claims] 1. A two-layer structure comprising a pipe lining layer having a collar at one end and impregnated with a curable resin, and a waterproof agent impregnated layer impregnated with a waterproof agent. A characteristic branch pipe lining material. 2. The pipe lining layer constitutes an outer layer and the water-stopping agent-impregnated layer constitutes an inner layer in a non-inverted state, and both are partitioned by a plastic film. Branch pipe lining material. 3. The surface of the brim is covered with a plastic film for preventing the intrusion of water from the outside and protecting the waterproofing agent impregnated layer until the inversion is started. The branch pipe lining material according to claim 1 or 2.