JPH07127116A - Repairing material for inner surface of pipeline - Google Patents

Abstract

PURPOSE:To make it possible to repair a mounting pipe and its joint units easily and definitely and finish the repair more attractively by using a repairing material having an opening unit which shapes a projected cylinder when it is inflated with air and opening this opening unit. CONSTITUTION:A rubber pipe 20 is loosely fitted into the outer peripheral part of a cylindrical body 10. A repairing material 21 is loosely wound around the outer peripheral part of the rubber pipe 20. A resin-impregnated and silk floss-shaped glass fiber stacked-glass fiber is used as the repairing material 21. An air is blown from an air hose 13, thereby inflating the whole of the rubber pipe 20. Furthermore, compressed air is injected thereinto so that the central opening part of the repairing material 21 is erected in the shape of a projected cylindrical body. More specifically, the repairing material 21 is welded with the inside of a pipeline 1 and a mounting weld unit 3 if the mounting pipe 2. The pressure is reduced the air is removed and the rubber pipe 20 is deflated, thereby ending an repair work.

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 in a device for repairing cracks, holes, etc. generated in a pipeline from the inner surface of the pipeline.
In particular, repair materials used for equipment that repairs pipes such as underground pipes that are difficult to inspect and repair from the outer surface of the pipes, especially the joints with the mounting pipes that are attached branch-wise to straight pipes. Regarding

[0002]

2. Description of the Related Art Conventionally, when a crack or a hole is opened in a conduit or a small sewer pipe buried in the ground and water leakage occurs, it is excavated from the surface of the ground to find a defective portion, Had been repaired or replaced. However, recently, a technology has been developed to detect a defective part from the inner surface by inserting a small TV camera into the duct through a manhole, and this technology has made it possible to detect the defective part and inspect the defective state. Repair technology from the inside of the pipeline has also been developed. As an example thereof, as shown in FIG. 1, a cylindrical body (wheel tube) 10 (shown in FIG. 2) whose both ends are closed is provided with a cylindrical sliding member 11 on the circumference of both ends. Insert into line 1. As shown in FIG. 2, a rubber tube 20 is loosely fitted to the outer circumference of the cylindrical body 10 over its entire length, and both ends of the rubber tube are tightly fixed to the cylindrical body 10 by tightening tools 16 as shown in FIG. There is. A repair material 21 impregnated with a curable resin binder is loosely wrapped around the rubber tube 20. This device is inserted up to the defective portion of the pipe line 1. At that time, one end of the tow rope is attached to the tow ring 15 of the front end portion 12 of the cylindrical body, the air hose 13 is connected to the air hose connecting pipe at the rear end, and the tow rope is pulled to the defective portion as a whole or towed. If the rope cannot be used, attach the push-fitting mouthpiece to the air hose connecting pipe and push the device to the defective part. When the rubber tube 20 is inflated so as to contact the inner surface of the conduit 1 and pressurize the inner surface by supplying air of a required pressure with the air hose 13, the repair material 21 wound on the outer side is the rubber tube 20 and the conduit. It is pressed against the inner surface of No. 1 and adheres closely. The inflated state of the rubber tube 20 at this time is shown in FIG.
As shown in (a), (b), (c), and (d) are in a sufficiently expanded state, and the repair material 21 is pressed against the inner surface of the conduit 1 for a certain period of time. The repair material hardens and becomes a state in which it adheres closely to the inner surface of the conduit. After the complete curing, the air in the cylindrical body 10 is evacuated and the device is taken out from the manhole to complete the repair. This method is generally referred to as EPR (Engineering Plastic Pipe Repai
r) Called the construction method.

To repair the joint between the main pipe and the mounting pipe, which is necessary for the water collection pipe in the sewer pipe, etc., a repair device of inverted T-shape is used as shown in FIG. The cap-type repair material with the opening shown in is used.

[0004]

The expansion / compression type repair method by the EPR method as described above is a conduit repair method which is very simple and has a good finish.
As shown in Fig. 1, the attachment joint 3 of the attachment pipe 2 that is absolutely necessary for collecting water in the sewer pipe or the like will block the hole that is the attachment portion in the expansion / compression type repair device of Fig. 1. It is not applicable, and in the case of the inverted T-shaped repair device shown in FIG. 3 in advance, since there is a convex portion at the center,
The convex portion obstructs the insertion into the pipe, and during the repair work, it is necessary to lift the repair device to the position of the mounting pipe, and the repair material attached to the repair device is also shown in FIG. Because of the open-ended hat type,
It is often the case in this field to develop and provide an efficient repair device and repair method for the joint part of the mounting pipe where the repair material is often not properly covered at the joint part of the mounting pipe, and defects such as leakage and damage are most likely to occur. It was the biggest challenge.

[0005]

As a result of intensive studies to solve the above-mentioned problems, the inventor of the present invention has found that, in the expansion-compression bonding method, the center of repair material impregnated with an adhesive resin is crossed with a cutter or the like. By making the notch, the repair material can be crimped to the attachment joint of the attachment pipe without using an inverted T-shaped repair device, and infiltration water from the connection part and damage etc. can be easily repaired. Repairing method (Japanese Patent Application No. 4-164611) and a repairing device in which an uneven portion is provided at the center of a rubber tube (Japanese Patent Application No. 5-2160).
No. 79) was provided. As a result of further studies on the repair device and the repair method, the present inventor has found that a convex cylindrical shape is formed at the central portion of the rubber pipe of the repair device, which is located at the joint portion of the mounting pipe in the conduit. The present invention was found to be extremely easy to repair the attachment joint portion of the attachment pipe by providing a repair material having the opening portion and opening / closing means at the opening portion. That is, according to the present invention, (1) a rubber tube is loosely fitted to the outside of a cylindrical body, a repair material impregnated with a resin binder is wound around the outer circumference of the rubber tube, the rubber tube is inflated with air, and the repair material on the outer circumference is inflated. In the repair material in the in-pipe repair device that expands, press-bonds to the inner surface of the conduit, and cures it to repair defects in the conduit from the inner surface, an opening that becomes a convex cylindrical shape when the repair material is inflated with air And the opening has opening / closing means, (2) the repairing material for the inner surface of the conduit, (2) the opening / closing means for opening / closing is a thread or a rubber band, (3) The repair material according to the above (1), wherein the convex opening of the repair material has a structure compatible with the uneven portion of the rubber tube for a repair device having a plurality of concentric concavo-convex shapes. A rubber tube is loosely fitted to the outside of the cylindrical body, and a resin binder is included on the outer circumference of the rubber tube. Wrap the repair material so that the rubber tube is inflated with air, and the repair material on the outer periphery is expanded, pressure-bonded to the inner surface of the conduit, and cured to repair defects in the conduit from the inner surface. In the method, the repair material according to the above (1), (2) or (3) is used, and the opening of the repair material is installed at a site located at the joint portion of the mounting pipe in the pipeline, The invention relates to a method for repairing an attachment pipe joint portion in a pipe line, which is characterized by inflating with air.

The repair material of the present invention will be described in more detail. 5 and 6 are schematic views of the repair material 21 of the present invention. The repair material 21 of the present invention has a cylindrical shape with an inverted T-shaped opening, and an opening / closing means 22 is provided in the opening of a convex cylinder at the center thereof, and this opening is closed when it is mounted on the repair device. There is. The opening / closing means is, for example, a thread or a rubber cord so that it opens when the repair material 21 is pressure-bonded to the attachment pipe and the attachment joint. After the repair material 21 is attached to the repair device, when the rubber tube is inflated with air,
Since the central portion of the repair material 21 is closed, it is surely lifted as the rubber tube in the central portion expands, rises into the mounting tube, and when the rubber tube swells due to further pressure, opening and closing of the central opening portion. The means are opened to ensure that the repair material is in close contact with the mounting tube and joint. The thread or the rubber string used as the opening means is cut by the expansion pressure of the rubber tube which is inflated with air, the opening is opened, and the tube is surely brought into close contact with the tube as described above.

The repair material 21 is a reinforcing material composed of glass fiber, other carbon fiber, Kepler fiber, etc., and a resin binder which is an engineered plastic resin such as unsaturated polyester resin, epoxy resin, emulsion resin, etc., especially in water channels. The repair is a matte product that is impregnated with an underwater curable resin binder, and is a synthetic resin product that has a constant strength with respect to directionality. Various repair materials can be combined depending on the size and strength of the target defect. This repair material is used by stacking one or more sheets, and the number of sheets is adjusted depending on the size of the defect. Examples thereof include one in which three ordinary glass cloths and two cotton-like glass cloths (waterproof mats) are alternately stacked and used as one set. In repairing the attachment joint of the defective attachment pipe, as shown in FIGS. 7 to 12, the repair device is pulled in and repaired at the location of the attachment joint of the defective attachment pipe. As shown in FIG. 7, the repair device is preferably a repair device which is provided at the central portion of the rubber tube 20 and is provided with unevenness 20 ′ at a portion located at the attachment joint portion 3 of the attachment tube 2. Rubber tube 2
As shown in FIG. 8, the repair material 21 of the present invention is loosely wound on the outer side of 0, and the repair material 21 of the present invention is wound around the central portion 20 'of the rubber tube.
It is arranged so that the central portion 21 'of the is fitted. Air of a required pressure is supplied from an air hose 13 through a pressurized air inlet 14 attached to the inner surface of the cylindrical body 10 of the repair device to inflate the rubber tube 20 so as to contact the inner surface of the conduit 1 and pressurize the inner surface. Then, the repair material 21 wound on the outer side is pressed between the rubber tube 20 and the inner surface of the conduit 1 to be in close contact,
Further, the rubber pipe 20 'positioned directly below the attachment joint of the attachment pipe lifts the repair material 21' and rises into the attachment pipe, and the thread serving as the opening / closing means of the opening is cut by the expansion pressure of the rubber pipe, and the repair material 21 and 21 'are securely crimped to the mounting tube 2 and its joint 3. Rubber tubes 20 and 2
When 0'swells and the repair materials 21 and 21 'are brought into close contact with the joint portion of the mounting pipe in the pipeline and repaired, they are wound around the outer circumference of the rubber pipe of the repair device as shown in FIGS. 8 to 12. The repair material 21 first swells outward from the central part in order, and at the same time, the water between the rubber tube 20 and the inner surface of the pipe 1 is extruded to the outside, and the rubber pipe 20 and the pipe 1 and the mounting state in an anhydrous state. The inner surface of the pipe 2 comes into direct contact therewith, so that the repair material 21 comes into direct contact with the inner surfaces of the conduit 1 and the mounting pipe 2. At this time, when the pressure rubber tube 20 is provided with the unevenness 20 ′ in the center thereof, it easily swells and easily enters the mounting tube, and the repair material 21 is easily crimped to the mounting tube 2 and the joint portion 3. However, it can be repaired. At that time, if the repair material 21 of the present invention is further applied, the central opening 21 ′ of the repair material 21.
Since it is closed by the opening / closing device at the beginning, when the rubber tube swells and enters the mounting tube, the repair material can be surely introduced into the mounting tube, and the repair of the mounting tube and the mounting joint can be performed reliably and easily. It can be done. After the repair material 21 crimped to the inside of the pipe line 1, the mounting pipe 2, and the joint portion 3 thereof is completely cured, the air in the cylindrical body 10 is evacuated, and the rubber tube 20 is returned to the original state.
The repair is completed by deflating to 0 and pulling the tow rope or air hose to remove the repair device from the manhole. In the repair device, the inner diameter of the conduit can be cleaned when adjusting the outer diameter of the sliding material 11 to a size according to the inner diameter of the conduit 1 when the device is retracted into the conduit 1. By improving the adhesive strength of 21 or by making the winding width of the repair material 21 narrower than the width of the rubber tube 20, the edge of the repair material after repair becomes thin and has a rounded shape. Therefore, it can be appropriately performed such that a wire is not caught when it is inserted.

[0008]

[Function] As a repair material, a convex opening is provided at the central portion of the rubber pipe, which is located at the joint of the mounting pipe in the conduit, and the opening / closing means is attached to the opening. When mounted on the device and inserted into the tube, the opening is closed,
Since it is not bulky, the repair device does not need to be an inverted T-shape and can be an ordinary cylindrical body, so it can be easily inserted into the conduit and the opening is closed when the rubber pipe enters the mounting pipe. Therefore, the repair material can be easily and surely lifted up into the mounting pipe, and the repair material can be crimped to the mounting pipe and the joint portion.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the repairing device 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. 7, a rubber tube 20 is loosely fitted over the entire length of the outer circumference of a cylindrical body (foil tube) 10 (FIG. 2) whose both ends are closed. As shown in FIG. 8, using a repair device in which a plurality of concavo-convex concavo-convex shapes of concavities and convexities 20 'are provided at the portion of the inside of the road 1 located at the joint 3 of the mounting pipe 2, as shown in FIG. The repair material 21 shown in FIG. 5 and FIG. 6 is loose because it consists of three glass fibers and two fluffy glass fibers (waterproof mat) alternately laminated on the periphery and impregnated with a water-curable resin. It is wrapped around. This repair material 2
The convex circular tube opening 21 'in the central portion of 1 is closed with a thread and is arranged at a portion located in the rubber tube 20'. Then
Air is blown from the air hose 13 through the pressurized air injection port 14 installed in the cylindrical body. FIG. 9 shows a state in which pressurized air injection is started. ′ Bulges and rises together with the repair material 21 ′ on its outer circumference. At that time, the mouth is closed. When pressurized air is further injected, the repair material 21 comes into close contact with the inside of the conduit 1 and the attachment joint portion 3 of the attachment pipe 2 as shown in FIG. 10, and as shown in FIG. Continues to expand, and due to the pressure, opening and closing thread 2
2 breaks, and the repair material 21 is securely crimped inside the mounting pipe. After the repair material 21 is brought into close contact with the inside of the pipe line 1, the inside of the mounting pipe 2 and the inside of the joint portion 3 thereof, as shown in FIG. 10, the pressure is reduced to remove air, and the rubber pipe 20 is deflated and repaired. Is completed. In using the repairing material 21 of the present invention, the rubber tube 20 is provided with a concavo-convex structure having a plurality of concentric circular peaks a, valleys b and peaks c in its central portion 20 'as shown in FIG. Since the portion is easily inflated by the pressurized air, the shape of the repair material of the present invention and the mechanism of the opening allow the repair material to be crimped to the attachment pipe and its joint very easily. Will be beautiful.

[0010]

According to the repair material of the present invention, the shape of the repair device can be made into a cylindrical shape which is easy to insert, and it is necessary to lift the repair device when repairing the attachment joint of the pipe for mounting the pipeline. Moreover, since the opening is closed, the repair material can be easily introduced into the mounting pipe by pressurization.
It is extremely easy and reliable to repair mounting pipes and joints.
Moreover, the finish can be made beautiful.

[Brief description of drawings]

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

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

FIG. 3 is a schematic cross section of a conventional conduit repair device for a mounting pipe and a joint.

FIG. 4 is a schematic view of a main part of a conventional repair material.

FIG. 5 is a schematic view of a main part when the opening of the repair material of the present invention is open.

FIG. 6 is a schematic view of a main part when the opening of the repair material of the present invention is closed.

FIG. 7 is a schematic view of a main part of the attachment pipe joint repairing device of the present invention.

FIG. 8 is a schematic diagram when the repair material of the present invention is mounted in the attachment pipe joint repair device of the present invention.

FIG. 9 is a schematic diagram at the start of injecting pressurized air in the attachment pipe joint repairing device of the present invention.

FIG. 10 is a schematic diagram during air pressurization in the attachment pipe joint repairing device of the present invention.

FIG. 11 is a schematic view during pressure bonding of a repair material in the attachment pipe joint repair device of the present invention.

FIG. 12 is a schematic view of the installation pipe joint repairing device of the present invention when repair is completed.

FIG. 13 is a schematic view showing an example of unevenness in the central portion of the rubber tube of the repair device.

[Explanation of symbols]

 1 Pipeline 2 Mounting Pipe 3 Joint 10 Cylindrical Body 11 Sliding Material 12 Cylindrical Front End 13 Air Hose 16 Rubber Tube Tightening Tool 20 Rubber Tube 20 'Rubber Tube Central Part 21 Repair Material 21' Repair Material Central Opening 22 Repair Material opening / closing means

Claims (4)

[Claims] 1. A rubber tube is loosely fitted to the outside of a cylindrical body, a repair material impregnated with a resin binder is wrapped around the outer circumference of the rubber tube, the rubber tube is inflated with air, and the repair material on the outer circumference is expanded. In the repair material in the in-pipe repair device for pressure-bonding to the inner surface of the pipeline, curing and repairing the defects of the pipeline from the inner surface, the repair material has an opening that becomes a convex tubular shape when inflated with air, The repair material for the inner surface of the pipeline, wherein the opening has an opening / closing means. 2. The repair material according to claim 1, wherein the opening / closing means for the opening is a thread or a rubber band. 3. The repair material according to claim 1, wherein the convex opening portion of the repair material has a structure that matches the uneven portion of the rubber tube for a repair device having a plurality of concentric circular uneven shapes. 4. A rubber tube is loosely fitted to the outside of a cylindrical body, a repair material impregnated with a resin binder is wrapped around the outer circumference of the rubber tube, the rubber tube is inflated with air, and the repair material on the outer circumference is expanded. In a repair method using an in-pipe repair device that crimps and hardens the inner surface of the pipeline to repair defects in the pipeline from the inner surface,
The repair material according to claim 1, 2 or 3, wherein the opening of the repair material is installed at a portion located at a joint portion of a mounting pipe in a pipeline, and a rubber tube is inflated with air. To do
Method of repairing attachment pipe joints in pipelines.