JP2793478B2 - Repair device for pipe inner surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for repairing a crack or a hole generated in a pipeline from the inner surface of the pipeline, and particularly to a pipeline such as an underground pipe which is difficult to inspect and repair from the outer surface of the pipeline, The present invention relates to a device for repairing a joint between a straight pipe and a pipe attached in a branch shape.

[0002]

2. Description of the Related Art Conventionally, when cracks or holes are opened in a conduit or a small sewage pipe buried in the ground and water leaks, a defective portion is digged from the surface of the ground to find a defective portion. Was repaired or replaced. However, recently, a technology has been developed to insert a small TV camera into the duct from the manhole to find a defective part from the inside, and this technology has made it possible to find the defective part and inspect the defective state. Repair technology from inside the pipeline has also been developed. As an example, as shown in FIG. 1, a cylindrical body (wheel tube) 10 (shown in FIG. 2) having both ends closed is provided with cylindrical sliding members 11 provided on the circumference of both ends. Insert into pipe 1. As shown in FIG. 2, a rubber tube 20 is loosely fitted on the outer periphery of the cylindrical body 10 over its entire length, and both ends of the rubber tube are tightened and fixed to the cylindrical body 10 by tightening tools 16 as shown in FIG. It is. A repair material 21 impregnated with a curable resin binder is loosely wound around the outside of the rubber tube 20. This device is inserted up to the defective portion of the pipeline 1. At this time, one end of the tow rope is attached to the tow ring 15 of the front end portion 12 of the cylindrical body, and the air hose 13 is connected to the air hose connection pipe at the rear end. If a rope cannot be used, attach a push-in base to the air hose connection pipe and push the device into the defective area. When the rubber hose 20 is inflated so as to contact the inner surface of the pipeline 1 and pressurize the inner surface by supplying air at a required pressure with the air hose 13, the repair material 21 wrapped around the outer side becomes the rubber tube 20 and the pipeline. 1 and is pressed against and adhered to the inner surface of the first member. The expanded state of the rubber tube 20 at this time is shown in FIG.
As shown in (2), after (B), (C), (C), and (D) are fully expanded, the repair material 21 is pressed against the inner surface of the pipe 1 for a certain period of time. The repair material hardens and is brought into a state of being adhered to the inner surface of the pipeline. After complete curing, the air is released from the cylindrical body 10 and the device is taken out of the manhole to complete the repair. This method is generally referred to as EPR (Engineering Plastic Pipe Repai).
r) This is called the construction method.

[0003]

The repair method of the expansion compression bonding method by the EPR method as described above is a pipe repair method which is very simple and has a good finish. However, as shown in FIGS.
The mounting joint 3 of the mounting pipe 2 necessarily used for collecting water in a sewer pipe or the like will block the hole serving as the mounting part in the expansion / compression type repair device. Therefore, the repair method shown in FIG. There was a problem that it could not be applied.
Since the attachment joint 3 of the attachment pipe is a place where different parts are joined, defects such as leakage and breakage are most likely to occur. Therefore, development of an efficient repair device and a repair method for this portion, Provision was the biggest challenge in this area.

[0004]

The inventor of the present invention has conducted intensive studies to solve the above-mentioned problems. As a result, in the above-mentioned expansion / compression bonding method, the center of the repair material impregnated with the adhesive resin was first crossed with a cutter or the like. By providing a notch, the repair material can be crimped to the fitting joint of the fitting pipe, and a repair method that can easily repair intrusion of water, breakage, and the like from the connection portion has been provided (Japanese Patent Application No. Hei 4 (1999)). 166461
issue). The present inventor has further studied this repair device, and as a result, has found that it is possible to repair the mounting joint portion of the mounting pipe very easily by providing irregularities at the center of the rubber tube, and has reached the present invention. . That is, the present invention comprises (1) a rubber tube loosely fitted to the outside of a cylindrical body whose both ends are closed, and a repair material impregnated with a resin binder such as an underwater curable resin wound around the outer periphery of the rubber tube. An apparatus for inflating the rubber tube with air, expanding the repair material on the outer periphery thereof, pressing the material on the inner surface of the pipeline, and curing the material to repair defects in the pipeline from the inner surface. At the site located at the mounting joint of
The present invention relates to an apparatus for repairing a joint portion of an attached pipe in a pipeline characterized by providing irregularities, and (2) the apparatus for repairing according to the above (1), wherein the irregularities of the rubber tube are formed of a plurality of concentric irregularities. is there.

[0005] The pipeline repair device of the present invention will be described in more detail. 3 to 10 are schematic views of a device for repairing a joint portion of a fitting pipe according to the present invention. In the apparatus of the present invention, a rubber tube 20 is loosely fitted over the entire outer circumference of a cylindrical body 10 (FIG. 2) whose both ends are closed. Both ends of the rubber tube 20 are tightened and fixed to the cylindrical body 10 by tightening tools 16. A repair material 21 is loosely wound around the outside of the rubber tube 20.
The rubber tube 20 is provided with irregularities 20 'at the center thereof. As shown in FIG. 11, the unevenness 20 ′ is formed of a plurality of concentric circles, the portion a is convex, the portion b is concave and the portion c is convex, and the air from the air hose 13 passes through the pressurized air inlet 14. When the rubber tube 20 is inflated by blowing, the tube 20 ′ can easily jump out into the mounting tube 2. Thus, the repair material 2 attached to the outside of the rubber tube
1 can easily be pressed against and brought into close contact with the conduit 1, the mounting pipe 2 and the joint 3 thereof. The repair material 21 is a reinforcing material such as glass fiber, other carbon fiber, and Kepler fiber, and a resin binder that is an engineered plastic resin such as an unsaturated polyester resin, an epoxy resin, and an emulsion resin. Impregnated into a mat-like shape, and is a synthetic resin product having a constant strength in the directionality. Various repair materials can be combined according to the size and strength of the target defect. One or more repair materials are used one on top of the other, and the number is adjusted according to the size of the defect. As an example thereof, there can be cited one in which three ordinary glass cloths and two cotton-like glass cloths (waterproof mats) are alternately stacked as one set. This repair material was wound (1) with a pair of repair materials cut in a cross shape, but with a small square hole cut off at the center of the cut end, and (2) another one.
The repair material of the set is cut in a cross shape, but the center of the cutting edge is slightly cut off and a small square hole is drilled, shifted from the first set, for example, 45 degrees with the first set The joint part of the mounting pipe in the pipeline can be repaired by using the one that is rotated, overlapped, and wound.

As shown in FIGS. 3 to 10, the apparatus of the present invention is pulled or pushed into the mounting joint of the defective mounting pipe and passed through the pressurized air inlet 14 mounted on the inner surface of the cylindrical body 10. When air of a required pressure is supplied from the air hose 13 to inflate the rubber tube 20 so as to contact the inner surface of the conduit 1 and pressurize the inner surface, the repair material 21 wrapped around the outer periphery of the rubber tube 20 and the conduit The rubber tube 20 ', which is pressed against and tightly attached to the inner surface of the mounting tube 1 and located just below the mounting joint of the mounting tube, enters into the mounting tube and rises to press the repair material to the bonding portion. When the rubber tube 20 'swells, as shown in FIGS. 3 to 10, it swells outward sequentially from the central portion, and at the same time as the swelling, water between the rubber tube 20 and the inner surface of the conduit 1 is pushed outward. In the anhydrous state, the rubber pipe 20 comes into direct contact with the inner surfaces of the pipe 1 and the mounting pipe 2, so that the repair material 21
And it will be in the state of direct contact with the inner surface of the mounting pipe 2. At this time, the unevenness 20 ′ is formed at the center of the pressurized rubber tube 20.
Is provided, so that the repair material can be easily crimped into the attachment pipe, and the repairing material can be easily crimped to the joint to repair. After the repair material pressed inside the pipe 1, the mounting pipe 2 and the joint 3 thereof is completely cured, the air in the cylindrical body 10 is evacuated, and the rubber pipe 20 is removed from the cylindrical body 10 as in the original state. Then, pull the tow rope or air hose to remove the repair device from the manhole and complete the repair. In addition, the repair device is
By adjusting the outer diameter of the sliding material 11 to a size corresponding to the inner diameter of the pipeline 1 when it is pulled in, the inner surface of the pipeline can be cleaned when the device is retracted, and the adhesive strength of the repair material 21 can be improved. It can also be measured. In addition, by making the winding width of the repair material 21 smaller than the width of the rubber tube 20, the end of the repair material after the repair becomes thin and rounded, and catching occurs when an electric wire or the like is inserted. You can make sure that nothing happens.

[0007]

The unevenness is provided at the center of the rubber tube, so that the rubber tube can easily enter the mounting tube, and the repair material can be easily pressed against the mounting tube and the joint.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the repair apparatus of the present invention will be described more specifically with reference to the drawings, but this does not limit the present invention. As shown in FIG. 3, a rubber tube 20 is loosely fitted over the entire outer circumference of a cylindrical body (foil tube) 10 (FIG. 2) whose both ends are closed. The rubber tube 20 is provided with a plurality of concentric concavo-convex shapes 20 ′ in a central portion thereof, which is located at the joint portion 3 of the mounting pipe 2 in the duct 1. As shown in FIG. 4, a repair made by impregnating an underwater curable resin with three glass fibers and two floss-like glass fibers (waterproof mat) alternately superimposed on the outer periphery of the rubber tube 20. The material 21 is loosely wound. The repair material 21 is formed by making a cross-shaped cut in the portion located in the rubber tube 20 'and cutting off a small amount at the center tip. Next, air is blown from the air hose 13 through the pressurized air injection port 14 attached to the cylindrical body. FIG. 5 shows a state where the pressurized air injection is started. Unevenness 2
0 'swells together with the repair material 21 on its outer periphery. When the pressurized air is further injected, as shown in FIG. 6, the repair material 21 comes into close contact with the inside of the pipe 1 and the attachment joint 3 of the attachment pipe,
Further, as shown in FIG. 7, the unevenness 20 'of the rubber tube continues to expand, and the repair material 21 is pressed against the inside of the mounting tube. After the repair material 21 is brought into close contact with the inside of the pipe 1, the inside of the attachment pipe 2, and the inside of their joints 3, as shown in FIGS. 21 'is deflated and the repair is completed. As shown in FIG. 11, the center portion 20 'of the rubber tube 20 has a plurality of concentric peaks a,
By providing the irregularities consisting of the valleys b and the ridges c, the parts can easily swell with pressurized air, and the repair material can be extremely easily crimped to the mounting pipe and the joint thereof, so that the repair finish is beautiful. It will be.

[0009]

According to the apparatus of the present invention, it is possible to easily repair the connection joint of the pipe mounting pipe, which has been difficult in the past, and to clean the finish.

[Brief description of the drawings]

FIG. 1 is a schematic view of a conventional pipeline repair device.

FIG. 2 is a partially cutaway sectional view of a wheel tube of the pipeline repair device of the present invention.

FIG. 3 is a schematic view of a main part of a fitting pipe repairing device according to the present invention.

FIG. 4 is a schematic view when a repair material is attached to the fitting repairing device for a fitting pipe of the present invention.

FIG. 5 is a schematic diagram at the time of starting injection of pressurized air in the attachment pipe joint repair device of the present invention.

FIG. 6 is a schematic view of the apparatus for repairing a joint of a fitting pipe according to the present invention during pressurization of air.

FIG. 7 is a schematic diagram of a fitting for repairing an attached pipe according to the present invention during repair material crimping.

FIG. 8 is a schematic diagram at the start of decompression of air in the joint repair device for a fitting pipe according to the present invention.

FIG. 9 is a schematic diagram during decompression of air in the attachment pipe joint repair device of the present invention.

FIG. 10 is a schematic view of the fitting pipe repairing device of the present invention at the time of completion of repairing.

FIG. 11 is a schematic diagram illustrating an example of the unevenness of the center portion of the rubber tube according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 2 Mounting pipe 3 Joint 10 Cylindrical body 11 Sliding material 12 Cylindrical body front end part 13 Air hose 16 Rubber pipe tightening tool 20 Rubber pipe 20 'Central part of rubber pipe 21 Repair material a Convex part b Concave part Concave part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F16L 55/16 B29C 63/34 E03F 3/00

Claims (2)

(57) [Claims] A rubber tube is loosely fitted to the outside of a cylindrical body whose both ends are closed, and a repair material impregnated with a resin binder is wound around the outer periphery of the rubber tube, and the rubber tube is inflated with air. The outer repair material is expanded and crimped to the inner surface of the pipeline,
An apparatus for repairing a defect of a pipeline from the inner surface by hardening, wherein unevenness is provided at a central portion of the rubber tube, which is located at a joint portion of a mounting tube in the pipeline. Equipment for repairing joints on pipes in roads. 2. The repair apparatus according to claim 1, wherein the unevenness of the rubber tube has a plurality of concentric unevennesses.