JPH06201085A - Resin coating type pipe inner surface repairing method and resin coating type pipe inner surface repairing device - Google Patents

Abstract

PURPOSE:To improve repair work efficiency by providing a repair tool having a rubber tube body expandable by the supply of pressure air, pulling this repair tool with resin repair material wound around the outer periphery of the rubber tube body, into a pipeline, and monitoring the movement in the pipeline by a monitor television to carry out repair. CONSTITUTION:A resin coating type pipe inner surface repairing device is provided with a pipeline inner wall repair tool A having a rubber tube body, expandable by the supply of pressure air, at the outer peripheral part, and a heater for heating the rubber tube body as well as a temperature sensor built therein. In the state of repair material, a mat like fiber-impregnated synthetic resin product, being wound around the outer periphery of the rubber tube body, the repair tool A is pulled into the pipeline 13, and a wire 10 is towed by the winch 19 or the like of an inner surface working vehicle 18 on the ground so as to be moved in the pipeline 13 to a defective place. At this time, an image taken by a TV camera 16 is projected on a monitor television 15 in a work monitor vehicle 14 on the ground so as to monitor the repaired place and to control the movement of the repair tool A. The rubber tube body is then expanded at the repaired place, and the repair material is closely attached to the inner surface of the pipeline 13 and hardened to terminate repair.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a resin coating repair from the inner surface of a pipeline for repairing damages, cracks, joint defects, etc., that have occurred in small-diameter sewer pipes and other underground pipes that are difficult to inspect and repair from the outer surface. It is related to the technology.

[0002]

2. Description of the Related Art As a technique for repairing a resin coating from the inner surface of a pipe of this type, Japanese Patent Laid-Open No. 3-178425 "Hard tube lining method for inner surface of pipe" is known.

[0003]

The above-mentioned known technique is to insert a resin tube into a pipeline, expand it under pressure, press it against the inner surface of the pipeline, heat cure it, and repair it. Although it is suitable, there is a problem that it is not economically suitable for limited local repair. In addition, since the sewer pipe is buried in the place where various conditions are different, the underground temperature around the pipeline at the repair location changes and the deterioration of the rubber pipe body equipped in the pressure repair device is prevented. Since it is necessary to keep the temperature rise below a certain limit, there is a problem of maintaining the temperature of the repaired portion within a certain range.

[0004]

The present invention relates to a resin-coated pipe inner surface repairing work for coating a resin on a damaged portion in a pipe, and the peripheral surface of the pipe is expanded by supplying pressurized air to the inner surface of the pipe. A rubber pipe body that can be pressure-bonded, a heater and a temperature sensor for heating the rubber pipe body, and a pipe inner wall repair tool that is movable in the pipe passage are used. After attaching the repair body to the outer peripheral surface of the rubber tube body, move the repair tool on the inner wall of the pipeline to the damaged part in the pipeline by wire pulling with the guidance of the TV camera moving in the pipeline. The compressed air is supplied to the rubber tube to expand it, and the outer peripheral surface of the rubber tube is pressed against the inner wall of the pipeline at the damaged location, and the repair body is pressed against the inner wall of the pipeline at the desired repair location. The linear heater is measured by measuring the temperature near the repaired body of the pipe and inputting it to the controller. By controlling the heating of the rubber pipe body by heating it to maintain the temperature of the repaired body within a predetermined range temperature and heating the repaired body for a predetermined time, the repaired body is cured while being pressed against the inner wall of the pipeline at the desired repair location. Then, the inner surface repair work of the resin-coated pipe is completed.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a pipe inner wall repair tool A used in the practice of the present invention, in which disks 4, 4 are welded to both ends of a cylindrical body 1 having a double cylinder structure of an inner cylinder 2 and an outer cylinder 3. An annular chamber C is fixed between the inner cylinder 2 and the outer cylinder 3 to form a through chamber D on the inner core side of the inner cylinder 2, and the rubber tubes 5 are attached to the discs 4 and 4 of the cylinder 1. The rubber tube body 5 is integrated with the cylindrical body 1 in a sealed state by a fixing means such as a band 6 to secure the pressure chamber E between the rubber tube body 5 and the outer cylinder 3 of the cylindrical body 1.
In the pressurizing chamber E, the pressurizing chamber E can be freely heated by the heating heater 7 wound around the outer peripheral surface of the outer cylinder 3, and the temperature sensor 8 is provided in the annular chamber C, and the disc 4 is provided. The tow metal fitting 9 is fixed and the repair tool A for the inner wall of the conduit is constructed.

[0006] The repair tool A for the inner wall of the conduit makes the wire 10 connected to one end of the traction fitting 9 movable in the conduit by towing with a winch or the like. Further, the disk 4 is provided with a pressurized air supply port 11, and by supplying pressurized air from an air hose 12 connected to the pressurized air supply port 11, the rubber tube body 5 is inflated and the pressure chamber is expanded. E is enlarged so that the rubber pipe body 5 can be pressed against the inner surface of the pipe line 13. The heater 7 for heating the pipe inner wall repair tool A and the temperature sensor 8 are connected to the external control device B on the ground by the 5-core cord 14, and the three wires are used for measuring the temperature sensor from one end of the temperature sensor to the other end of the two wires. Control device by one-wire three-wire cord system (measurement error due to resistance of cord between control device B and measurement position is prevented by loading one wire not connected to the temperature sensor to two wires connected to both ends of the temperature sensor) Connect to B and use the remaining two wires for heater power supply. In the embodiment, the power supply to the heating heater is AC100V or AC220V wiring. However, when low voltage wiring is required, DC24V, D
Other power distribution methods such as C12V can be applied.

Next, in the practice of the present invention, the repair material M used for repairing the inner wall of the pipeline is made of glass fiber or carbon fiber as a core material and uniformly impregnated with a binder of unsaturated polyester resin, epoxy resin or lipoxy resin. It is a synthetic resin product that has been matted. The strength and thickness of the repair material M are adjusted by the amounts of the core material and the resin to be impregnated. When the mat-shaped repair material M is wound around the outer circumference of the rubber tube body 5,
On the surface of the rubber tube body 5, grease (oils and fats), an adhesion prevention sheet and the like are interposed between the rubber tube body 5 and the repair material M to prevent the repair material M from adhering.

After the repair material M is wound around the outer periphery of the rubber tube 5, the repair tool A for the inner wall of the conduit is drawn into the conduit 13, and the wire 10 is pulled by a winch 19 or the like to the defective part in the conduit 13. To move. At this time, a TV that monitors the inner wall of the pipeline
Based on the video signal from the camera 16, the monitor TV 15 in the work monitoring vehicle 14 on the ground detects the repaired portion of the inner wall of the pipeline and instructs the towing of the inner working vehicle 18 on the ground by the winch 17 or the like. Guide the movement of the inner wall repair tool A. The repair tool A for the inner wall of the pipeline is pulled at a predetermined defective location (repair location) on the inner wall of the pipeline, and the repair body M is attached to the damaged location in the pipeline.
After confirming that they were facing each other on the monitor TV 15,
Pressurized air is sent to the pressure chamber E of the repair tool A for the inner wall of the pipe.

Continued feeding of pressurized air into the pressurizing chamber E,
By inflating the rubber tube body 5 until it comes into pressure contact with the inner surface of the conduit 13, the repair material M is pressed between the rubber tube body 5 and the inner surface of the conduit 13 and comes into close contact with the inner surface of the conduit 13. If this condition is maintained for a certain period of time, the repair material M will cure, but if the ambient temperature is low at this time, the curing time will become long and unstable, so heating by the heating heater 7 will stabilize the curing and increase the curing time. Try to shorten.

The temperature of the annular chamber C is measured by the temperature sensor 8, and the heating by the linear heater 7 is remotely controlled via the control unit B to maintain the repaired body M within a predetermined temperature range. When the repair material M is hardened over a predetermined time,
The repaired body M is closely attached to the defective portion on the inner wall of the conduit (repaired portion),
The pipe inner wall repair work according to the present invention is completed.

After completion of the repair work at a predetermined repair location,
The heating by the heating heater 7 is stopped, the pressurized air in the pressurizing chamber E is released, and the rubber tube body 5 is contracted to cause the rubber tube body 5 to contract.
The surface of the pipe is separated from the inner surface of the pipe line 13 to allow the pipe inner wall repair tool A to move freely. Pull the wire with a winch or the like to move the conduit inner wall repair tool A to the next defective part of the conduit inner wall, and continue the conduit inner wall repair work, or pull the conduit inner wall repair tool A to the ground for repair. Complete the work. In repairing the inner wall of the pipeline, by maintaining the temperature near the repair material in the optimum temperature range (for example, 20 ° C to 70 ° C) and curing the resin, regardless of the temperature around the pipeline at the repaired location,
The repair material can be surely hardened to perform a complete resin coating repair, and by controlling the maximum temperature, the rubber tube 5
To prevent rubber deterioration.

Due to the presence of the penetration chamber D, repair work can be performed in a water-passing state, and cooling air and cooling water can be supplied to the penetration chamber D when repairing the inner wall of the pipeline at a location with a high underground temperature around the pipeline. Repairing during movement of the repair tool for the inner wall of the pipeline (during work to set repair material to the repair location on the inner wall of the pipeline) by lowering the temperatures of the annular chamber C and the pressurizing chamber E (for example, 20 ° C. or less) by passing The effect of the material can be prevented. In the embodiment, the repair tool for the inner wall of the conduit is moved by the pulling wire method, but it may be a self-propelled (robot) type of remote control.

[0013]

[Effect] According to the present invention, a resin coating is applied to only a damaged portion in a pipeline by remote control, and a strong resin coating is formed on a repair location on the inner wall of the pipeline, and a complete resin coating repair is performed at low cost. You can Furthermore, by maintaining the resin in the optimum temperature range and curing it, the repair material can be reliably cured and complete resin coating repair can be performed regardless of the temperature around the pipeline at the repair location. By controlling the maximum temperature of the chamber, there is an effect that the deterioration of the rubber of the rubber tube body is prevented and the repair tool for the inner wall of the conduit can be used semipermanently.

[Brief description of drawings]

FIG. 1 is an explanatory view of repair work on an inner wall of a pipeline according to the present invention.

FIG. 2 is a vertical cross-sectional view of a repair tool for an inner wall of a conduit, in which the left half shows a state in which the rubber tube is not pressed and the right half shows a state in which the rubber tube is pressed. A Pipe inner wall repair tool B Control device C
Annular chamber D Penetration chamber E Pressurization chamber M
Repair material 1 Cylindrical body 2 Inner cylinder 3
Outer cylinder 4 Disc 5 Rubber tube 7
Heater for heating 8 Temperature sensor 13 Pipeline

Claims (5)

[Claims] 1. A resin-coated type pipe inner surface repairing method for coating a damaged portion in a pipe line with a resin, wherein a rubber tube body is enlarged by supplying pressurized air so that its peripheral surface can be crimped to the inner surface of the pipe line. After attaching the repair body to the outer peripheral surface of the rubber pipe body on a repair tool for the inner wall of the pipe body, which has a heater and a temperature sensor for heating the rubber pipe body and is movable in the pipeline, By moving the TV camera to move to a damaged part in the pipe line by pulling the wire, pressurized air is supplied to the rubber tube body to expand the rubber tube body,
The outer peripheral surface of the rubber tube is pressed against the inner wall of the conduit, the repair body is pressed against the inner wall of the conduit and the outer peripheral surface of the rubber tube to the damaged portion, and the temperature in the vicinity of the repaired body of the repair tool for the inner wall of the conduit is measured. And input to the control device to control the heating by the linear heater to maintain the temperature of the repair body within a predetermined range temperature and heat the repair body for a predetermined time to cure the repair body Pipe inner surface repair method. 2. A rubber tube body is located on the outer circumference of an outer cylinder of a double-tube cylinder and attached to the cylinder, and a through hole is formed in the central portion of the conduit inner wall repair tool. The method for repairing a resin-coated pipe inner surface according to claim 1. 3. A temperature sensor in a sealed space between an inner cylinder and an outer cylinder of a double pipe, wherein a rubber heater is wound around an outer peripheral surface of an outer cylinder of the double pipe. The resin-coated pipe inner surface repairing method according to claim 1, wherein the inner surface of the resin-coated pipe is repaired. 4. An external control device and a conduit inner wall repairing tool are connected by a 5-core cord, and a 3-wire cord control system in which 3 wires are used for a temperature sensor, from one end of the temperature sensor to one wire from the other end. 2. The resin-coated pipe inner surface repairing method according to claim 1, wherein the remaining two wires are used for a heater. 5. A circular cylinder 1 is formed between the inner cylinder 2 and the outer cylinder 3 by fixing the disks 4, 4 to both ends of a cylindrical body 1 having a double cylinder structure of an inner cylinder 2 and an outer cylinder 3 by welding or the like. The chamber C is formed and the through chamber D is formed on the inner core side of the inner cylinder 2, and the circular plates 4, 4 of the cylindrical body 1 are formed.
The rubber tube body 5 is integrated with the cylindrical body 1 in a sealed state by a fixing means such as a band 6 to secure the rubber tube body 5 to the outer cylinder 3 of the cylindrical body 1 and a pressurizing chamber. E is formed, and the pressurizing chamber E is freely heated by the heating heater 7 wound around the outer peripheral surface of the outer cylinder 3 in the pressurizing chamber E. The tow metal fitting 9 is fixed to the pipe to construct the repair tool A for the inner wall of the pipeline, and the temperature sensor 8 of the repair tool A for the pipeline inner wall measures the temperature in the vicinity of the repair tool to control the heating by the heating heater 7 to repair the repair tool. A resin coating type that is equipped with a control device for maintaining the temperature in the vicinity within a predetermined range temperature and heats the repair body for a predetermined time while maintaining the temperature of the repair body within a predetermined range temperature to cure the repair body. Pipe inner surface repair device.