JPH08326138A - Mending device for inner surface of large diameter duct - Google Patents

Abstract

PURPOSE: To enhance the safety and efficiency for the work of mending the inner surface of a large-bore duct by constructing a mending device from a cylindrical body made from an elastic material with a drain pipe, a passage pipe, and a fixing rope which are located respectively at the lower part, center part, and each side of the cylindrical body, and mounting a guard sponge plate on its outer periphery. CONSTITUTION: Air is injected from an air suction hole 16 in a mending device 11 made of an elastic rubber material, so that the device 11 is formed into a cylindrical body. A drain pipe 12 is provided therein to force water in a duct through the drain pipe 12 so as to perform operations safely. Next, a communicating passage pipe 13 is provided in the center of the inside to allow easy passage from each side. Further, safety valves 17 are provided on each side 14 of the cylindrical body to keep safety. A guard sponge plate 24 is mounted on the outer peripheral surface 15. The plate 24 is 10 to 50mm thick and 10 to 50 degrees in hardness. Subsequently, at the stage of air injection, glass fibers and floss-silk-like glass are stacked, impregnated with a resin, and bonded to the plate 24. A mending material is pressed against the inner surface of the duct by the plate 24. Air for mending is vented by means of linear elements 25. Therefore, the mending work can be completed in a short time.

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 whole tow rope is pulled to the defective portion 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 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 repairing device into the pipe from the manhole, there is a case where the sliding material cannot be inserted due to being stuck inside the manhole or the pipe line. I can't take it out,
After injecting air into the repair device, the air hose is often entangled with each other to form a knot, which makes it inconvenient to exhaust the air after the repair material is in close contact and to remove the device. And in the case of a pipe having a large diameter, for example, a diameter of φ800 to 2000 mm, a large device is preferable, but such a large device cannot be inserted from the manhole because the diameter of the manhole lid is φ600 mm. Is a compact device as described above, in which the repair material is crimped by inflating only the central portion of the device, which cannot be sufficiently crimped, and water in the pipeline cannot pass through. It was not possible and was dangerous. Further, it is desired to prevent contamination during work by a repair device, particularly a repair device for the inner surface of a large-diameter pipeline, and improve safety and efficiency of the repair work.

[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 present invention was found to be able to solve the above problems all at once by using a contracted state when inserting and removing from. 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 And a side face fixing rope provided on both side surfaces of the tubular body in order to prevent the side surface of the tubular body from bulging, and a guard sponge plate made of natural or synthetic rubber is provided on the outer periphery of the tubular body. Large diameter pipe repair device characterized by being installed, (2) Elasticity that can be inflated by suction of air because the repair material is crimped into the pipe impregnated with a resin binder that is attached to the outer periphery Sealed with a circular or polygonal cross section made of body material 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 In order to do this, a large-diameter conduit repair is made up of side-fixing ropes provided on both sides of the tubular body, and a guard sponge plate made of natural or synthetic rubber is attached to the outer periphery of the tubular body. Apparatus, (3) Large-diameter pipe repair according to the above (1) or (2), wherein an air venting linear body composed of convex linear objects is provided on the upper surface of the guard sponge plate at regular intervals. The device and (4) Guard sponge plate has a thickness of 10
The above (1) and (2) having 50 mm and a hardness of 10 to 50 degrees.
Alternatively, it relates to the large-diameter pipe repair device according to (3).

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.

Further, in the present invention, a guard sponge plate made of natural or synthetic rubber is attached to the outer circumference of the cylindrical body. The guard sponge plate is a natural or synthetic rubber sponge or foam such as polyvinyl chloride (PVC) sponge, polyethylene foam, urethane foam, chloroprene rubber (CR) sponge. The thickness and hardness of the guard sponge plate are not particularly limited, but for example, the thickness is 10 to 50 mm, preferably 20 to 30 mm, and the hardness is 10 to 50 degrees, preferably 2
It can be 0 to 30 degrees. The guard sponge plate is provided with a plurality of air-bleeding linear bodies at regular intervals on its upper surface so that air can be bleeded when the repair material is pressure-bonded perpendicularly to the longitudinal direction of the sponge rubber plate. This facilitates 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. The repair material is the size of the target defect,
Various types can be combined depending on the strength. 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 4 to 5 ordinary glass cloths, 2 to 3 ordinary roving cloths and 2 true glass cloths (waterproof mats) are alternately stacked and used as one set.

Referring to the drawings, FIGS. 3 to 8 are drawings relating to a large-diameter pipe 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 main body of the present invention, FIG. 5 is a sectional view of the repair device main body of the present invention, FIG. 6 is a front view of the repair device main body of the present invention, and FIG. FIG. 8 is another front view of the main body of the repair device 11 for a pipe in a bore, and FIG. 8 is a front view of a guard sponge plate. In the figure, 12 is a drainage pipe,
It is provided at the bottom of the tubular body and is for working safely through the water in the pipeline. Reference numeral 13 denotes a communication (or work) passage pipe, which is provided near the center of the cylindrical body and allows a worker to freely come and go to both sides of the device to facilitate the work. Reference numeral 14 denotes both side surfaces of the tubular body, which includes an air intake port 16 and a safety valve 1.
7, a carrying handle 18, and a pull-out hook 19 are 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. In the device of the present invention, a guard sponge 24 is attached to the outer peripheral surface 15 of the tubular body. The guard sponge plate 24 is provided with a convex air-bleeding linear body 25, which is devised so that the air in the repair material can easily escape when pressure is applied. FIG. 7 shows another example of the main body of the repairing device for a large diameter pipe according to the present invention, in which the communication passage pipe 13 is not provided. In this device, the drainage pipe 12 has a large diameter. If used, 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, inserts it into the pipeline from the manhole in a compressed state, then transports it to the position to be repaired in the pipeline, and guard sponge on the outer periphery of the main body of the device. A plate is attached, and then a repair material is attached to the outer periphery of the guard sponge plate, and air is injected to press the repair material to a repair point in the pipeline to cure it and complete the repair. Next, air is removed from the repair device to reduce the size, and the repair device main body and the guard sponge are taken out from the manhole.

[0008]

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. Also, by attaching a guard sponge plate to the outer periphery of the air mode, which is the main body of the repair device, it is possible to prevent punctures due to the protrusions on the inner surface of the air mode conduit, and the synthetic resin that is the binder does not adhere to the air mode, making it durable. The safety is improved, the operation is easy in operation, and it is safe. In particular, since the resin does not adhere to the safety valve in the air mode, the safety can be further ensured and the working efficiency is remarkably improved.

[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 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. An aluminum drainage pipe 12 having an inner diameter of 300 mm and a length of 1000 mm is provided inside the cylindrical body, and water in the pipe line to be repaired is passed through, so that the work can be performed safely. An aluminum connecting 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 portion is installed at a position 500 mm from the bottom). You can easily come and go from both sides.
An air inlet 16 for injecting air into the cylindrical body and a safety valve 17 for maintaining safety are provided at appropriate positions on both side surfaces 14 of the cylindrical body. 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.
Attach 4 and crimp the repair material. Then, in the middle of injecting air, three glass fibers of an appropriate size (for example, 700 mm in width and 4000 mm in length) and two sheets of fluffy glass of the same size are stacked according to the size of the scratch in the pipeline. The combined product impregnated with an underwater curable resin is attached to a guard sponge plate 24 attached to the outer peripheral surface 15 of the tubular body, and air is injected to inflate the guard sponge plate 24 on the outer peripheral surface 15. By crimping the repair material to the inner surface of the pipe by 24,
Then it is cured and repaired. The guard sponge plate 24 has a constant interval (30 to 100 mm), a height of 3 to 6 mm, and a width of 4 to 4.
By providing a 6 mm convex air bleeding wire 25, it is possible to easily bleed air in the repair material. Further, on both side surfaces 14 of the cylindrical body, a carrying handle 18 and a pulling hook 19 are provided.
Are provided respectively. 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.

[0010]

Since the repair device of the present invention is capable of expanding and contracting the entire device, it is extremely easy to insert and remove from the manhole, and the work in the pipeline is easy and safe.
Furthermore, by installing the guard sponge plate of the present invention, it is possible to prevent puncture due to the protrusions on the inner surface of the duct of the rubber elastic body (air mode) of the repair device, and to prevent the synthetic resin from adhering to the air mode, thus making the device durable. It is easy to operate and safe for work, and since the resin does not adhere to the air mode safety valve in particular, it is possible to further ensure safety, work efficiency is improved three times or more, and in a short time. Repair work can be completed.

[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 view of one large-diameter conduit repair device of the present invention.

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

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

FIG. 6 is a front view of a large-diameter in-pipe repair device main body of the present invention.

FIG. 7 is a front view of one large diameter in-pipe repair device main body of the present invention.

FIG. 8 is a front view of the guard sponge plate 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 23 Hanging Cloth 24 Guard Sponge Plate 25 Air Vent Liner

Claims (4)

[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 side surface fixing rope provided on both side surfaces of the tubular body to prevent the side surface of the tubular body from bulging, and a guard sponge plate made of natural or synthetic rubber is attached to the outer periphery of the tubular body. A large-diameter pipe repair device characterized by 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 In order to do this, a large-diameter conduit repair is made up of side-fixing ropes provided on both sides of the tubular body, and a guard sponge plate made of natural or synthetic rubber is attached to the outer periphery of the tubular body. apparatus. 3. The large-diameter conduit repair device according to claim 1 or 2, wherein the guard sponge plate is provided with air bleeding linear bodies made of convex linear objects on the upper surface at regular intervals. . 4. A guard sponge plate having a thickness of 10 to 50 mm,
The large-diameter conduit repair device according to claim 1, which has a hardness of 10 to 50 degrees.