JP2865240B2 - Repair material 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 repair material used for a device for repairing a crack or a hole generated in a pipeline from an inner surface of the pipeline.
Repair material used for equipment that repairs joints between pipes that are difficult to inspect and repair from the outer surface of pipes, especially underground pipes, especially straight pipes, and that are attached to branch pipes. About.

[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.

In order to repair the joint between the main pipe and the mounting pipe necessary for the drainage pipe in a sewer pipe or the like, a repairing device having an inverted T-shape is used as shown in FIG. The hat-type repair material shown in the figure below is used.

[0004]

The repair method of the expansion compression bonding method by the EPR method as described above is a very simple and good finish method for repairing a pipeline.
As shown in FIG. 1, the mounting joint 3 of the mounting pipe 2 which is necessarily required 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 of FIG. It cannot be applied, and the reverse T-shaped repair device shown in FIG. 3 has a convex portion at the center,
The convex portion hinders the insertion into the pipe, and in the repair work, it is necessary to lift the repair device to the position of the mounting pipe, and the repair material to be attached thereto is also shown in FIG. Because of the open hat type,
Repair materials are often not adequately covered at the joints of mounting pipes, and the development and provision of efficient repair equipment and repair methods for mounting pipe joints where defects such as leakage and breakage are most likely to occur are in this field. It was the biggest challenge.

[0005]

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 making a notch, the repair material can be crimped to the mounting joint of the mounting pipe without using a reverse T-shaped repair device, and it easily repairs infiltration water and damage from the connection part Repair method (Japanese Patent Application No. Hei 4-166461) and a repair apparatus in which a rubber tube is provided with an uneven portion at the center thereof (Japanese Patent Application No. 5-2160).
No. 79). As a result of further study of the repair device and the repair method, the inventor has found that a convex cylindrical shape is provided at the center of the rubber tube of the repair device, which is located at the joint of the mounting pipe in the pipeline. It has been found that the present invention has found that the repairing material having the opening and the opening / closing means in the opening makes it possible to repair the mounting joint of the mounting pipe extremely easily. That is, the present invention provides (1) a rubber tube that is loosely fitted to the outside of a cylindrical body, 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 to repair the outer periphery of the rubber tube. In the repair material in the in-pipe repair device that repairs the defect of the pipeline from the inner surface by expanding and pressing the inner surface of the pipeline and pressing and hardening, the opening that becomes a convex cylindrical shape when the repair material is inflated with air. A repairing material for the inner surface of the pipeline, wherein the opening has opening / closing means, and (2) a repairing material according to (1), wherein the opening / closing means is a thread or a rubber cord. (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 the repair device having a plurality of concentric uneven shapes. A rubber tube is loosely fitted to the outside of the cylindrical body, and the outer periphery of the rubber tube contains a resin binder. The repair material is wound around, the rubber tube is inflated with air, and the repair material on the outer periphery is expanded, pressed against the inner surface of the pipeline, and cured to repair the defect of the pipeline from the inner surface. In the method, the repair material according to the above (1), (2) or (3) is used, an opening of the repair material is installed at a position located at a joint of the mounting pipe in the pipeline, and the rubber pipe is mounted. The present invention relates to a method of repairing an attachment pipe joint in a pipe, characterized by inflating with air.

The repair material of the present invention will be described in more detail. 5 and 6 are schematic diagrams 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 has an opening / closing means 22 at an opening of the central convex cylinder, and this opening is closed when mounted on the repair device. I have. This opening / closing means uses, for example, a thread or a rubber cord so as to open when the repair material 21 is crimped to the attachment pipe and the attachment joint. After attaching the repair material 21 to the repair device, when the rubber tube is inflated with air,
Since the central part of the repair material 21 is closed, it is reliably lifted with the expansion of the rubber pipe at the central part, rises into the mounting pipe, and opens and closes the central opening when the rubber pipe is expanded by further pressurization. The means is opened to ensure that the repair material adheres to the mounting tube and joint. The thread or rubber cord used as the opening means is cut by the inflation pressure of the rubber tube inflated with air, the opening is opened, and the tube is securely brought into close contact with the tube as described above.

The repair material 21 is a reinforcing material made of glass fiber, other carbon fiber, Kepler fiber, etc., and a resin binder which is an engineered plastic resin such as an unsaturated polyester resin, an epoxy resin, an emulsion resin, especially in a waterway. The repair is made into a mat by impregnating a curable resin binder in water, and is a synthetic resin product with constant strength in the direction. 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. In repairing the mounting joint of the defective mounting pipe, as shown in FIGS. 7 to 12, a repair device is pulled into the mounting joint of the defective mounting pipe for repair. As shown in FIG. 7, the repairing device is preferably a repairing device which is provided at the central portion of the rubber tube 20 and is provided with irregularities 20 'at a position located at the mounting joint 3 of the mounting tube 2. Rubber tube 2
As shown in FIG. 8, the repair material 21 of the present invention is loosely wrapped around the outside of the rubber tube, as shown in FIG.
Are arranged so that the central portion 21 'of the. 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, and the rubber tube 20 is inflated so as to contact the inner surface of the pipe line 1 and pressurize the inner surface. Then, the repair material 21 wound around the outside is pressed between the rubber tube 20 and the inner surface of the pipeline 1 so as to be in close contact therewith,
Further, the rubber pipe 20 'located just below the mounting joint of the mounting pipe lifts the repairing material 21' and rises into the mounting pipe, and the thread which is the opening / closing means of the opening is cut by the expansion pressure of the rubber pipe, and the repairing material is cut off. 21 and 21 ′ are securely crimped to the mounting tube 2 and its joint 3. Rubber tubes 20 and 2
When the repair material 21 and 21 'are in close contact with the joint portion of the mounting pipe in the pipeline and repaired, the repair material 21 and 21' are wound around the rubber tube of the repair device as shown in FIGS. The repair material 21 first swells outward from the center in order, and at the same time as the swelling, water between the rubber tube 20 and the inner surface of the pipe 1 is pushed outward, and the rubber pipe 20 and the pipe 1 are attached in an anhydrous state. The inner surface of the pipe 2 comes into direct contact, so that the repair material 21 comes into direct contact with the inner surface of the pipe 1 and the mounting pipe 2. At this time, if the pressurized rubber tube 20 has an unevenness 20 ′ at 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 its joint 3. And can be repaired. At this time, when the repair material 21 of the present invention is further applied, the central opening 21 ′ of the repair material 21 is applied.
Is first closed by the opening and closing device, so that when the rubber tube inflates into the mounting tube, the repair material can be reliably introduced into the mounting tube, and the repair of the mounting tube and the mounting joint can be performed reliably and easily. You can do it. After the repair material 21 crimped to the inside of the pipe 1, the mounting pipe 2 and the joint 3 thereof is completely cured, the air in the cylindrical body 10 is released, and the rubber pipe 20 is returned to its original state.
It is retracted to zero and the tow rope or air hose is pulled to remove the repair device from the manhole, completing the repair. In addition, in the repair device, when pulling into the pipeline 1, the outer diameter of the sliding material 11 is adjusted to a size corresponding to the inner diameter of the pipeline 1, and when the device is retracted, the inner surface of the pipeline can be cleaned. By improving the adhesive strength of the repair material 21 or by making the width of the wound repair material 21 smaller than the width of the rubber tube 20, the end of the repair material after the repair is thinned and rounded. Thus, it is possible to appropriately perform such operations as to prevent the wire from being caught when the electric wire or the like is inserted.

[0008]

A convex opening is provided at the center of the rubber tube as a repair material at the joint of the mounting pipe in the pipe, and the opening and 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, there is no need to make the repair device an inverted T-shape, and it can be an ordinary cylinder, so it is easy to insert it into the pipeline, and the opening is closed when the rubber tube enters the installation tube. Therefore, the repair material can be easily and reliably lifted into the mounting pipe, and the repair material can be pressed against the mounting pipe and the joint.

[0009]

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. 7, a rubber tube 20 is loosely fitted over the entire circumference of a cylindrical body (foil tube) 10 (FIG. 2) whose both ends are closed. As shown in FIG. 8, as shown in FIG. 8, a repair device provided with a plurality of concentric irregularities 20 ′ is provided at a portion of the road 1 located at the joint portion 3 of the mounting tube 2. The repair material 21 shown in FIGS. 5 and 6 is loosely formed by impregnating an underwater curable resin with three glass fibers and two cotton-like glass fibers (waterproof mat) alternately stacked on the outer periphery. It is wound. This repair material 2
The central circular tube opening 21 'of the first tube 1 is closed with a thread and arranged at a position located in the rubber tube 20'. Then
Air is blown from an air hose 13 through a pressurized air injection port 14 attached to a cylindrical body. FIG. 9 shows a state in which pressurized air injection is started. ′ Inflates together with the repair material 21 ′ on its outer periphery and rises. At that time, the mouth is closed. When the pressurized air is further injected, as shown in FIG. 10, the repair material 21 comes into close contact with the inside of the pipe 1 and the mounting joint 3 of the mounting pipe 2, and as shown in FIG. As the pressure continues to expand, the opening and closing yarn 2
2 is cut, and the repair material 21 is securely pressed to the inside of the mounting pipe. 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 the joint 3 thereof, as shown in FIG. Is completed. In using the repair material 21 of the present invention, as shown in FIG. 13, the rubber tube 20 is provided with a plurality of concentric peaks, valleys b, and peaks c at the center portion 20 ′ thereof. Since the part is easily expanded by the pressurized air, the repair material can be extremely easily crimped to the mounting pipe and the joint thereof by the shape of the repair material of the present invention and the mechanism of the opening, and the repair is finished. Will be beautiful.

[0010]

According to the repair material of the present invention, it is possible to make the shape of the repair device cylindrical so that it can be easily inserted, and it is necessary to lift the repair device when repairing the connection joint of the installation pipe of the pipeline. There is no, and since the opening is closed, the repair material is easily introduced into the mounting pipe by pressure,
Repair of mounting pipes and joints is extremely easy and reliable,
And the finish can be beautiful.

[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 cross-sectional view of a conventional pipe repair device for a fitting pipe and a joint.

FIG. 4 is a schematic diagram 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 repair device of the present invention.

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

FIG. 9 is a schematic view at the start of injection of pressurized air in the attachment pipe joint repair device of the present invention.

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

FIG. 11 is a schematic view of a repairing device for a fitting joint of a mounting pipe according to the present invention, during repair material crimping.

FIG. 12 is a schematic diagram at the time of completion of the repair in the mounting pipe joint repairing apparatus of the present invention.

FIG. 13 is a schematic diagram illustrating an example of unevenness of a central portion of a rubber tube of the repair device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 2 Mounting pipe 3 Joining part 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 21' Repair material central opening 22 Repair Material opening and closing means

Claims (4)

(57) [Claims] 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 rubber tube, the rubber tube is inflated with air, and the repair material on the outer periphery is expanded. In a repair material in a pipeline repair device that compresses and cures a pipeline defect from the inner surface by curing the pipeline from the inner surface, the repair material has an opening that becomes a convex cylindrical shape when the repair material is inflated with air, A material for repairing an inner surface of a pipeline, wherein the opening has opening / closing means. 2. The repair material according to claim 1, wherein the opening / closing means of the opening is a thread or a rubber cord. 3. The repair material according to claim 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 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 wound around the rubber tube, the rubber tube is inflated with air, and the repair material on the outer periphery is expanded. In a repair method using an in-pipe repair device that presses and cures the inside of the pipe to cure the defect of the pipe from the inside,
4. The repair material according to claim 1, 2 or 3, wherein an opening of the repair material is installed at a position located at a joint of the mounting pipe in the pipe, and the rubber pipe is inflated with air. Do
How to repair joints of pipes in pipelines.