JPH07238527A - Repair device of inner face of large diameter pipe line - Google Patents

Abstract

PURPOSE:To facilitate the repair work, by providing a drain pipe and a passage pipe in the inside of an expansible cylindrical body and also a rope fixing the side face at both side faces of the cylindrical body. CONSTITUTION:A drain pipe is connected to the lower part of an expansible cylinder and a passage pipe 13 for connection is provided at the center and further, a preventive rope 20 against swelling is provided at the inside of both side faces 14. Air is injected from an air intake 16 and a repair material in which superposed flossy glass fibers are immersed in a water curing resin is stuck on the external peripheral face 15 of the device on swelling the reapir device. And further, after the repair device has been inserted from a manhole into the pipe, the device is completely swelled to press the repair material on the inside face of pipe and cure it.

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 cracks, holes, etc. generated in a large-diameter conduit from the inner surface of the conduit.

[0002]

2. Description of the Related Art Conventionally, when a crack, a hole or the like is opened in a conduit or a small sewer pipe buried in the ground and water leakage occurs, excavation is performed from the surface of the ground to find a defective portion, and It was repaired or replaced. In addition, recently, a technology has been developed to detect a defective part from the inner surface by inserting a small TV camera into the conduit through a manhole. With this technology, it is possible to detect a defective part and inspect the defective condition. , Repair technology from the inside of the pipeline has also been developed. As an example, as shown in FIG. 1, a cylindrical body (wheel tube) 1 (shown in FIG. 2) whose both ends are closed is provided with a cylindrical sliding member 4 on the circumference of both ends. Insert into the conduit 9. Figure 2
As shown in FIG. 1, a rubber tube 2 is loosely fitted over the outer circumference of the cylindrical body 1, and both ends of the rubber tube are tightly fixed to the cylindrical body 1 by tightening tools 5 as shown in FIG. . A repair material 3 impregnated with a curable resin binder is loosely wrapped around the rubber tube 2. This device is inserted up to the defective portion of the pipe line 9. At that time, one end of the tow rope is attached to the tow ring 8 of the front end portion 6 of the cylindrical body, the air hose 7 is connected to the air hose connecting pipe at the rear end, and the entire tow rope is pulled to the defective portion or pulled. 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 2 is inflated so as to contact the inner surface of the pipe 9 and pressurize the inner surface by supplying air of a required pressure with the air hose 7, the repair material 3 wound on the outer side is the rubber tube 2 and the tube. It is pressed against the inner surface of the passage 9 and comes into close contact with it. The bulging state of the rubber tube 2 at this time is as shown in FIG.
After going through (c), it becomes a sufficiently expanded state of (d), and by leaving the repair material 3 pressed against the inner surface of this conduit 9 for a certain period of time, the repair material hardens and it fits perfectly on the inner surface of the conduit. It will be in an attached state. After the complete curing, the air in the cylindrical body 1 is evacuated and the device is taken out from the manhole to complete the repair. This method is generally called EPR (Engineering P
It is called the lastic Pipe Repair method. For repairing a large-diameter pipe, a similar device is used to expand the central portion of the rubber tube to the extreme and crimp the repair material.

[0003]

The expansion / compression type repair method by the EPR method described above is a conduit repair method which is very simple and has a good finish, but the repair device is integrally fixed. Therefore, when inserting the repair device into the pipe from the manhole, the sliding material may not be inserted into the manhole or the pipe line.
Similarly, because the pipe diameter becomes narrow, the sliding material is stuck and the device cannot be taken out.After injecting air into the repair device,
The air hose is often entangled with each other to form a knot, which causes inconvenience such as being unable to exhaust air after the repair material is brought into close contact with the device, or being unable to take out the device. And large diameter, for example, diameter is φ800-2000mm
A large device is preferable in the case of such a pipe, but since such a large device has a manhole diameter of 600 mm, it cannot be inserted from the manhole at all. The repair material is pressure-bonded by inflating only the part, and the pressure-bonding cannot be performed sufficiently, and water in the pipeline cannot be passed, which is dangerous.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor has used a closed cylindrical body made of an elastic body which can be inflated by blowing air into a manhole. The inventors have found that the above-mentioned problems can be solved all at once by making them in a contracted state upon insertion and removal from, and have reached the present invention. That is, according to the present invention, (1) since a repair material is pressure-bonded into a conduit impregnated with a resin binder that is attached to the outer periphery thereof, a cross section made of an elastic body that can be expanded by suction of air is circular or polygonal. -Shaped sealed tubular body, a drainage pipe provided in the lower portion inside the tubular body for passing water in a conduit, and a communication provided near the central portion inside the tubular body Large diameter conduit repair device, characterized in that it comprises a passage pipe of the above, and a side surface fixing rope provided on both side surfaces of the tubular body to prevent the side surface of the tubular body from bulging, (2) its outer periphery A sealed cylindrical body having a circular or polygonal cross section made of an elastic body that can be inflated by suction of air for crimping a repair material into a conduit impregnated with a resin binder to be adhered to
A drainage pipe for passing water in a pipe line provided in a lower portion inside the tubular body, a passage pipe also serving as the drainage pipe, and a tubular shape for preventing the side surface of the tubular body from bulging. A large-diameter pipe repair device characterized by comprising side-fixing ropes provided on both side surfaces of the body, and a linear object convex at regular intervals outside the circumference of a cylindrical body to which the repair material is crimped The invention relates to the large-diameter conduit repair device according to (1) or (2) above, which is provided with an air-bleeding linear body.

The tubular body of the apparatus of the present invention is a cylindrical body having a circular cross section which conforms to the shape of the pipeline to be repaired, or a polygonal polygonal tubular body such as a quadrangular tubular body or a hexagonal tubular body. Can be This tubular body has both sides sealed, and any material can be used as long as it is an elastic body and can be inflated by air. Various natural and synthetic rubbers or reinforced rubbers or laminated layers thereof. Things etc. are used. A drainage pipe is provided at the bottom of the tubular body for passing water in the pipeline. This tube may have any shape, but normally it can have the same shape as the cylindrical body, such as a circular tube with a circular tube and a polygonal tube with a circular tube. It can be a similar polygonal tube. The material of this tube may be synthetic resin, metal or the like. This drainage pipe allows safe work. In the vicinity of the center of the inside of the tubular body, there is provided a communication passage pipe that can come and go to both side surfaces of the tubular body.
As a result, the repair work can be facilitated.
Similarly, the material of this tube may be either synthetic resin or metal. The drainage pipe and the connecting straight pipe can also be used together. In addition, side-fixing ropes with the ends of the rope fixed to the inner surfaces of both sides of the tubular body are attached, which allows the tubular body to expand in the circumferential direction when air is injected. It is possible to prevent the bulges on both side surfaces other than the above and efficiently press-bond the repair material. An air bleeding linear body made of a convex linear body is provided on the side surface of the tubular body to which the repair material is pressure bonded. This can facilitate the elimination of air contained in the repair material. The repair material used in the present invention is a reinforcing material such as glass fiber, other carbon fiber, Kepler fiber, etc., resin binder which is an engineering plastic resin such as unsaturated polyester resin, epoxy resin, emulsion resin, etc. It is a synthetic resin product that has a constant strength with respect to directionality because it is made into a mat shape by being impregnated with a curable resin binder. 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. An example thereof is one in which three ordinary glass cloths and two true glass cloths (waterproof mats) are alternately stacked and used as one set.

Referring to the drawings, FIGS. 3 to 7 are drawings relating to a large-diameter conduit repair device according to the present invention.
Is a schematic diagram of an example of the large-diameter in-pipe repair device 11 of the present invention,
4 is a perspective view of the repair device of the present invention, FIG. 5 is a sectional view of the repair device of the present invention, FIG. 6 is a front view of the repair device of the present invention, and FIG. 7 is a large-diameter conduit of the present invention. It is another front view of the internal repair device 11. Reference numeral 12 in the drawing denotes a drainage pipe, which is provided at the lower part of the tubular body and is used for safely working through the water in the pipe line. Reference numeral 13 denotes a communication passage pipe, which is provided near the central portion of the cylindrical body and allows an operator to freely move to both sides of the apparatus to facilitate the work. 14 are both side surfaces of the tubular body, which include an air inlet 16, a safety valve 17, and a carrying handle 1.
8. A hook 19 for pulling out is provided. Further, inside the both side surfaces 14 of the tubular body, a swelling prevention rope for preventing swelling due to air on the side surfaces is provided by a rope stopper 21. Reference numeral 15 denotes an outer peripheral surface of the tubular body, by which the repair material is pressed against the damaged portion in the conduit. A convex air-bleeding linear body 22 is provided on the outer peripheral surface 15 of the tubular body, so that the air in the repair material can be easily removed during pressure bonding. FIG. 7 shows another example of the large-diameter in-pipe repair device according to the present invention, which is an example in which the communication passage pipe 13 is not provided. In this device, the drain pipe 12 has a large diameter. If so, it can also be used as the communication passage tube 13. Reference numeral 23 is a hanging cloth for hanging the device. When repairing the inside of the pipeline, this repair device does not inject air, but inserts it into the pipeline from the manhole in a compressed state,
Then, it is transported to the position to be repaired in the pipeline, the repair material is attached to the outer periphery of the repair device, air is injected, and the repair material is pressure-bonded to the repair location in the pipeline and cured. Then the repair is completed. Then, deflate the air from the repair device and reduce it,
Take it out of the manhole.

[0007]

The large-diameter conduit repair device of the present invention uses an inflatable elastic body as a material, and can be inserted into and taken out from the manhole in a contracted state. It can be easily inserted into the pipe, and since a passage pipe for connecting from both sides is provided near the inner center of the tubular body, repair work can be performed easily and reliably, and water in the pipe Since a drainage pipe for passing water is provided, work can be performed safely.

[0008]

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 FIGS. 3 to 7, the repair device 11 made of a rubber elastic body becomes a cylindrical body when inflated by injecting air from the air suction port 16. The diameter of the repairing device 11 is the same as φ for repairing the inside of a pipe with a diameter of 1200 mm.
The size is 1200 mm and the length is 1000 mm. Inside the cylindrical body, a drainage pipe 12 made of synthetic resin having an inner diameter of 300 mm and a length of 1000 mm is provided.
Since the water in the pipeline to be repaired is passed through, it is possible to work safely. A synthetic resin communication passage tube 13 having an inner diameter of 500 mm and a length of 1000 mm is provided near the center of the inside of the cylindrical body (the lower part is installed at a position 500 mm from the bottom). Easy access to both sides of the device. An air inlet 16 for injecting air into the cylindrical body at appropriate points on both side surfaces 14 of the cylindrical body and a safety valve 17 for maintaining safety.
Is provided. The outer peripheral surface 15 of the cylindrical body is a surface on which a repair material is pressure-bonded to a place to be repaired in the conduit. Then, in the middle of injecting the air, an appropriate size (for example, width 500 mm, length 120
0 mm) 2 cotton fibers with the same size as 3 glass fibers
A stack of sheets impregnated with a water-curable resin is adhered to the outer peripheral surface 15 of the tubular body, and air is injected to inflate the outer peripheral surface 15 and the repair material is pressure-bonded to the inner surface of the conduit. Then, cure and repair. 3 to 6 mm in height and 4 to 6 mm in width at regular intervals (30 to 100 mm) on the outer peripheral surface 15 of the tubular body.
By providing the convex air-bleeding linear body 22, the air in the repair material can be easily discharged. Also, both side surfaces 14 of the cylindrical body
A carrying handle 18 and a pull-out hook 19 are provided in each. As shown in FIG. 4, a bulge preventing rope 20 is attached to the inner surfaces of both side surfaces 14 of the cylindrical body by a rope stopper 21 attached to the inner surface thereof, whereby both side surfaces of the cylindrical body are attached. It is designed not to swell.

[0009]

Since the repair device of the present invention can be expanded and contracted as a whole, it can be inserted and removed from the manhole very easily, and the work in the pipeline is easy and safe.

[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 a conventional conduit repair device.

FIG. 3 is a schematic diagram of a large-diameter conduit repair device according to the first embodiment of the present invention.

FIG. 4 is a perspective view of the large-diameter conduit repair device of the present invention.

FIG. 5 is a cross-sectional view of the large-diameter conduit repair device of the present invention.

FIG. 6 is a front view of the large-diameter conduit repair device of the present invention.

FIG. 7 is a front view of a large-diameter conduit repair device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Cylindrical Body 2 Rubber Tube 3 Repair Material 4 Sliding Material 5 Rubber Tube Tightening Tool 6 Cylindrical Body Front End 7 Air Hose 8 Traction Ring 9 Pipeline 11 Large Diameter Pipeline Repair Device 12 Drainage Pipe 13 Communication Passage Pipe 14 Both Sides of Cylindrical Body 15 Outer Surface of Cylindrical Body 16 Air Suction Port 17 Safety Valve 18 Carrying Handle 19 Drawer Hook 20 Swelling Prevention Rope 21 Rope Stopper 22 Air Venting Wire Body 23 Hanging Cloth

Claims (3)

[Claims] 1. A hermetically sealed section having a circular or polygonal cross section made of an elastic body which can be inflated by suction of air for crimping a repair material into a conduit impregnated with a resin binder attached to the outer periphery thereof. A tubular body, a drainage pipe for passing water in a pipeline provided in a lower portion inside the tubular body, a passage pipe for communication provided near the central portion inside the tubular body, And a large-diameter in-pipe repair device comprising side surface fixing ropes provided on both side surfaces of the cylindrical body to prevent the side surface of the cylindrical body from bulging. 2. A sealing material having a circular or polygonal cross section made of an elastic material which can be inflated by suction of air for crimping a repair material into a conduit impregnated with a resin binder adhered to the outer periphery thereof. A tubular body, a drainage pipe provided in the lower part of the inside of the tubular body for passing water, and a passage pipe also serving as the drainage pipe, and a bulge on the side surface of the tubular body A large-diameter in-pipe repair device, characterized in that it comprises side-fixing ropes provided on both sides of the tubular body in order to do so. 3. An air bleeding linear body made of convex linear objects is provided at regular intervals outside the circumference of a cylinder of a tubular body to which a repair material is crimped. Large diameter pipe repair device.