JP2002349785A - Repairing material for inner surface of conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide repairing material for an inner surface of a bent conduit. SOLUTION: Repairing material impregnated with resin binder is wound around a rubber tube of a repairing device for the inside of the conduit, and the rubber tube is inflated with air, so that the repairing material around it is expanded to be pressed to the inner surface of the conduit to be hardened for repairing defects in the conduit from the inner surface in this repairing material for the repairing device for the inside of the conduit. The repairing material comprises reinforcement fibers fabricated to be freely expanded and contracted, or laminate of them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair material used for a device for repairing a crack or a hole generated in a pipeline from an inner surface of the pipeline, and particularly to a bent material such as a pipe attached to a main pipe from a ground yard. The present invention relates to a repair material suitable for repairing the inner surface of a pipe of a damaged pipe.

[0002]

2. Description of the Related Art In recent years, repair techniques have been developed from the inner surface of a conduit when a crack or a hole is opened in a conduit pipe or a sewer pipe buried underground and water leakage occurs. As an example,
As shown in FIG. 5, a cylindrical sliding member 2 is provided on the circumference of both ends of a cylindrical body (wheel tube) 21 whose both ends are closed.
4 is inserted into the pipe line 29. A repair material 23 impregnated with a curable resin binder loosely wound around the outside of a rubber tube 22 loosely fitted over the entire length of the cylindrical body 21 is supplied with air of a required pressure by an air hose 27 to the rubber tube 21. 22 is expanded and pressurized and adhered to the inner surface of the conduit 29. When the repair material 23 is pressed against the inner surface of the pipe 29 and left for a certain period of time, the repair material hardens and is brought into a state of being exactly attached to the inner surface of the pipe. After complete curing, the air is exhausted from the cylinder 21 and the device is taken out of the manhole to complete the repair. This method is generally called an EPR (Engineering Plastic Pipe Repair) method. A conventionally used repair material is a laminate of cloth made of glass fiber, carbon fiber, aramid fiber, or the like, which is impregnated with a curable synthetic resin.

[0003]

The conventional repair material used in this EPR method is to impregnate a synthetic resin into a laminate of cloth such as glass fiber, carbon fiber, and aramid fiber, and to use the impregnated rubber pipe for a repair apparatus. This is to be fixed by crimping on the inner surface of the pipeline, but there is a problem in the crimping to the inner surface of the bent pipeline with the repair material made of the conventional laminate, and the repair material has a problem with the inner surface of the bent pipeline. And it was difficult to fix and fix it tightly.

[0004]

The inventor of the present invention has conducted intensive studies in order to solve the above-mentioned problems. As a result, the present inventors repaired an inner surface of a pipe made of various reinforcing fibers woven or stretched or a laminate thereof. The present inventors have found that the use of the repair material in (1) allows the repair of the inner surface of the bent pipe to be in close contact with no gap and a good finish, and has reached the present invention.
That is, according to the present invention, (1) a repair material impregnated with a resin binder is wound around the outer circumference of a rubber pipe of a pipe repair apparatus, the rubber pipe is inflated with air, the repair material on the outer circumference is expanded, and the pipe inner surface is expanded. A repair material in an in-pipe repair device that presses and cures and repairs a defect in a pipeline from an inner surface, wherein the repair material is a stretchable knitted reinforcing fiber or a laminate thereof. (2) The repair material according to (1), wherein the reinforcing fiber is selected from the group of glass fiber, carbon fiber, and aramid fiber, and (3) the woven material is a braid. A repair material according to (1) or (2).

[0005] The repair material of the present invention is glass fiber, carbon fiber,
It is made of a stretchable knitted aramid fiber or a laminate thereof. The knitting method of the repair material may be any knitting method as long as it is elastic. The shape of the knitted fabric is applied to the outer periphery of the rubber tube of the in-pipe repair device, and can be arbitrarily selected as appropriate. For example, it may be a cylindrical object that is knitted and stretched with glass fiber so as to cover the entire outer periphery of the rubber tube. Specifically, it is a braid (a cylindrical woven fabric that expands and contracts). The repair material of the present invention is used by attaching to the outer peripheral surface of the rubber tube of the repair device,
At the time of sticking, a resin binder is impregnated. As the resin binder, a curable synthetic resin, for example, an unsaturated polyester resin, an epoxy resin, an emulsion resin, or the like,
In particular, for repair in a water channel, a water-curable resin binder (epoxy resin) is preferable.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic front view of a pipe inner surface repairing material according to the present invention, which is made of a cylindrical body which is stretchably woven with fibers such as glass fiber. This cylindrical body is attached to the outer circumference of the rubber tube of the repair device and used. In the figure, 1 is a repair material, and 2 is both ends of the repair material. The end 2 of the repair material does not expand or contract. FIG. 2 is a schematic front view showing a state in which the pipe inner surface repairing material of the present invention expands and contracts.
Indicates a contracted state, and (b) indicates an extended state. FIG.
FIG. 1 is a schematic view showing an example of a partial structure of a repair material woven elastically according to the present invention. In the figure, 3 indicates a stitch. The repair material of the present invention may be of any knitting method as long as it is knitted elastically. FIG. 4 is a schematic cross-sectional view of a mounting pipe and a main pipe buried in the ground. The repair material of the present invention is applied to the inner surface repair of a bent portion of a pipe such as a bent mounting pipe, and is closely adhered without a gap. It can be fixed and has a very good finish.

[0007] equipped with a braid (cylindrical knitted fabric expands and contracts) of glass fibers impregnated with the embodiment underwater curable resin binder on the outer periphery between the rubber pipe inner surface repair device, the mounting tube are buried in the ground Then, the rubber tube was inflated by introducing air, and the repair material provided on the outer periphery was fixed by pressure bonding to the inner surface of the pipeline. The repair material adhered tightly to the bent part without any gaps, and the repair could be performed with good finish.

[0008]

Since the repair material of the present invention is woven so that it can be expanded and contracted,
It can be fixed tightly without any gaps, has a good finish, and can repair the inner surface of a bent pipe. Also, the manufacture of the repair material itself can be extremely simplified, and the repair material is highly practical.

[0009]

[Brief description of the drawings]

FIG. 1 is a schematic front view of a pipe inner surface repairing material of the present invention.

FIG. 2 is a schematic front view of the pipe inner surface repairing material of the present invention;
(A) is a schematic diagram of a contracted state, (b) is a schematic diagram of an expanded state.

FIG. 3 is a schematic view showing an example of a partial structure of a pipe inner surface repairing material of the present invention.

FIG. 4 is a schematic cross-sectional view of a mounting pipe and a main pipe buried in the ground.

FIG. 5 is a schematic view of a conventional pipeline inner surface rehabilitation device.

[Explanation of symbols]

 1. Repair materials 2. Repair material edge 3. Stitch 11. Ground 12. Masu 13. Mounting pipe 14. Main pipe 21. Cylindrical body 22. Rubber tube 23. Conventional repair materials 24. Gliding material 25. Rubber tube fastener 26. Cylindrical body front end 27. Air hose 28. Tow ring 29. Pipeline

Claims (3)

[Claims] 1. A repair material impregnated with a resin binder is wrapped around the outer circumference of a rubber pipe of an in-pipe repair apparatus, the rubber pipe is inflated with air, and the outer repair material is expanded, pressed and hardened on the inner face of the pipe. A repair material for an in-pipe repair device that repairs a defect in a pipeline from an inner surface thereof, wherein the repair material is made of a stretchable knitted reinforcing fiber or a laminate thereof. Repair material for road surface. 2. The repair material according to claim 1, wherein the reinforcing fibers are selected from the group consisting of glass fibers, carbon fibers, and aramid fibers. 3. The repair material according to claim 1, wherein the woven material is a braid.