JP2004053001A - Repair device for internal surface of pipeline and repair construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a repair device for an internal surface of a bent pipeline and a repair construction method using the same. <P>SOLUTION: This device is formed from a non-adhesive synthetic resin main body tube having a diameter smaller than that of the internal surface of the pipeline to be repaired, both closed ends and an air injection port at one end, and is used as the repair device for the internal surface of the bent pipeline by mounting a repair material on an outer peripheral surface of the synthetic resin main body tube and pressing the repair material on the internal surface of the pipeline. The repair material is mounted on the main body tube of a regeneration device for the internal surface of the pipeline, the tube is introduced into the bent pipeline, air is injected from the air injection port of the main body tube of the repair device for the internal surface of the pipeline, and the repair material for the internal surface of the pipeline is pressed by expanding the main body tube of the repair device for the internal surface of the pipeline and the repair material is adhered and fixed to the internal surface of the pipeline. Air is discharged from the main body tube and the main body tube is taken out of the pipeline. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a repair device for repairing cracks, holes, and the like generated in an existing pipeline from the inner surface of the pipeline, and particularly to a repair device and a repair method for a bent pipeline inner surface.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, when a crack or a hole has occurred in a conduit pipe or a small sewage pipe buried in the ground, a defect is repaired or replaced by excavating from the surface of the ground.
In recent years, a technology has been developed to insert a small TV camera into a conduit through a manhole to find a defective portion from the inner surface, and this technology has made it possible to find a defective portion and inspect the defective state. An internal rehabilitation technique has also been developed (see Patent Document 1). The repair material placed on the outer peripheral surface of the main tube of the pipe inner surface repair device and pressed against the inner surface of the pipe is a cloth sheet or a non-woven cloth made of glass fiber, carbon fiber, Kepler fiber, or the like impregnated with resin. It is composed of a laminate thereof (see, for example, Patent Document 2).
[0003]
[Patent Document 1]
Japanese Utility Model Laid-Open Publication No. 3-91599 (page 1, FIG. 1)
[Patent Document 2]
JP-A-8-145275 (page 1, FIG. 2)
[0004]
[Problems to be solved by the invention]
The above-mentioned conventional rehabilitation method for the inner surface of the pipeline is a very simple and well-finished method for repairing the inner surface of the pipeline.However, in the case of a bent pipeline, when a repair material using a conventional rubber tube is crimped, a bent portion is formed. The fibers become trumpet-like and the repair material is in a rolled-up state, and if it is cured as it is, the tube cannot be pulled out. Also, in the case where a vinyl sheet or the like is sandwiched in order to facilitate separation of the rubber tube and the repair material, the vinyl sheet bites together at the bent portion, so that the vinyl sheet cannot be removed. In addition, wrinkles were formed on the repairing material to be crimped, and a clean finish could not be formed along the bent surface, whereby a smooth flow of water was obstructed, and there was a problem that dirt was accumulated and the pipe was clogged. Also, the repair material sheet is used by wrapping it around with a polyethylene sheet or the like in order to eliminate the resistance at the time of inserting the repair material sheet into the pipe and smoothly insert it, but after removing the tube after construction, the pipe is removed. The end of the polyethylene sheet for insertion remains and the finish is not good, and when using the conventional sheet-like repair material, a gap is created between the mounting pipe and the main pipe, resulting in poor finish. was there.
[0005]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to solve the above-described problems, and as a result, using a repair material and a non-adhesive synthetic resin tube whose diameter is smaller than the diameter of the pipeline inner surface, inserting this into the pipeline inner surface, The repair material placed on the outer periphery of the tube is inflated with air and fixed by pressure, and then the air is released to take out the tube, so that the inner surface of the pipe can be repaired with good finish. It has been found that the above-mentioned problem can be solved by devising a tip portion of the above and devising a synthetic resin sheet such as a polyethylene sheet for pipe insertion, which wraps around the sheet, and arrived at the present invention.
That is, the present invention comprises (1) a non-adhesive synthetic resin main body tube whose diameter is smaller than the diameter of the inner surface of the pipe to be repaired, both ends are closed, and an air inlet is provided at one end thereof. A bent pipe inner surface repairing device comprising placing a repair material on the outer peripheral surface of the main body tube and crimping the material to the inner surface of the pipeline, (2) the diameter of which is 1/2 to the diameter of the inner surface of the pipeline to be repaired. (3) The pipe inner surface repair device according to (1), (3) the non-adhesive synthetic resin main body tube is a polyvinyl chloride tube, (3) the pipe inner surface repair device according to (1), (1) The pipe line inner surface repair apparatus according to (1), wherein the repair material is wrapped around a pipe-inserting synthetic resin sheet having a perforated end portion, and (5) the pipe-inserting synthetic resin sheet is polyethylene. (4) The pipe inner surface repairing device according to (4), which is a sheet. (1) The pipe inner surface repair device according to (1), wherein the material further comprises a repair material on the tip portion thereof; (7) The pipe inner surface repair device according to (1), wherein the bent pipe is an attachment pipe; 8) A repair material is attached to the main body tube of the pipe inner surface rehabilitation device of (1), the tube is introduced into the bent pipe, and air is injected from the air inlet of the main body tube of the pipe inner surface rehabilitation device. The pipe inner surface repair device is characterized by expanding the main body tube, crimping the pipe inner surface repair material and bonding it to the inner surface of the pipe, then removing air from the main body tube and taking out the main body tube from the pipe. (9) The repairing method of (9), wherein the repair material is wrapped around a perforated synthetic resin sheet for perforating the pipe at the end thereof. Construction method, (10) repair material is further supplemented to the tip (7) The method of repairing the inner surface of a bent pipe according to (7), which is made of laminated materials; (11) The inner surface repair of a bent pipe wrapped around with a synthetic resin sheet for pipe insertion with a perforated end portion thereof And (12) a repair material for repairing the inner surface of a bent pipe, which is obtained by superimposing a repair material on a tip portion of the repair material.
[0006]
The present invention repairs cracks and holes on the inner surface of a pipeline, particularly a bent inner surface of a pipeline, with a good finish without a state in which the repair material is turned over, and easily pulls out the repair device after the repair material is crimped into the pipeline. Repair equipment and repair method.
The pipe inner surface repair apparatus and repair method of the present invention will be described in detail below.
FIG. 1 is a schematic perspective view of a pipe inner surface repair device of the present invention, FIG. 2 is a schematic diagram showing a state in which a repair material is placed on the outer periphery of a main body tube of the pipe inner surface repair device, and FIG. FIG. 4 is a schematic diagram of a repair material in which a repair material having a certain length is further stacked on the repair material, FIG. 4 is a schematic diagram of the repair material covered with a polyethylene sheet for pipe insertion having a perforation at its tip on the outer periphery of the repair material, FIG. 5 is a schematic view of a pipe line inner surface repair apparatus in which a repair material having a fixed length further superimposed thereon is mounted as a repair material, and FIG. 6 is a perforation at the distal end of the repair material on the outer periphery thereof. And FIG. 7 is a schematic diagram of a pipe inner surface repairing apparatus on which a repair material covered with a polyethylene sheet for pipe insertion is placed, and FIG. 7 shows a main body tube of the pipe inner surface repairing apparatus of the present invention inserted into a pipe. FIG. 8 is a schematic view showing the state, and FIG. Is a cross-sectional view schematically showing a. In the figure, 1 is a non-adhesive synthetic resin main body tube of a pipe inner surface repairing device, 2 is an air inlet, 3 is a front end portion of the main body tube, 3 'is a rear end portion of the main body tube, and 4 and 4' are tube clamps. 5, 5 'is a tow ring, 6, 6' is a repair material, 7 is a tow wire, 8 is a polyethylene sheet for inserting a pipe, 9 is a perforation of a polyethylene sheet, 11 is a mounting pipe, 21 is a main pipe. , 22 are means for inserting the main body tube, and a is a synthetic resin permeable hole.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The pipe inner surface rehabilitation device of the present invention is shown in FIG. 1 and comprises a non-adhesive synthetic resin main body tube 1 having both ends closed and an air injection port 2 at one end. Towed rings 5 and 5 'are respectively attached to the front end 3 and the rear end 3' which are both ends thereof, and the tube is provided with tube fasteners 4 and 4 'at both ends thereof. . It is necessary that the main body tube is made of a synthetic resin that is non-adhesive, particularly non-adhesive to the repair material. Any synthetic resin having such a function can be used. As the synthetic resin, polyethylene (PE), polypropylene (PP), polystyrene (PC) and polyvinyl chloride (PVC) are usually used, and polyvinyl chloride is preferable. Polyvinyl chloride has properties such as easy processing, excellent transparency, good self-adhesiveness, etc., and it is necessary to adjust hard and soft materials or tensile strength, elongation, etc. depending on the amount of plasticizer used. It can have a large expansion coefficient and a large tensile strength, is non-adhesive to the repair material used in the present invention, and can be preferably used.
The length of the main body tube is appropriately selected according to the length of the inner surface of the pipeline, and the diameter thereof is selected to be smaller than the diameter of the inner surface of the pipeline to be repaired. 4 and preferably about 2/3.
As shown in FIG. 2, a repair material 6 is placed on the outer periphery of the main body tube, and the repair material 6 is inflated by the main body tube 1 and fixed to the inner surface of the pipe by crimping. Since the diameter of the main body tube of the present invention is smaller than the diameter of the inner surface of the conduit, the diameter of the main tube is reduced when the air is evacuated from the main tube after the crimping of the repair material, so that the main tube can be easily taken out from the conduit. . The material of the main tube must be non-adhesive to the repair material to facilitate removal. This material is as described above, and in view of its characteristics, polyvinyl chloride resin is optimal.
As the repair material, a non-woven fabric or a woven fabric impregnated with a resin is used. For example, resin binders such as glass fibers, other carbon fibers, and aramid fibers are engineered plastic resins such as unsaturated polyester resins, epoxy resins, and emulsion resins. A matte shape is used by impregnating a resin binder made of a thermosetting or photo-setting resin such as a binder or other thermoplastic resin. Various numbers and types of nonwoven fabric sheets of the resin binder-impregnated mat can be combined as needed.
Specifically, a laminated sheet composed of a resin-coated glass cloth-a robin glass cloth-a glass cloth impregnated with a curable resin binder is used.
Particularly preferred resin is one obtained by blending an amine as a curing agent with an epoxy resin. The mixing ratio of the epoxy resin and the curing agent is appropriately selected, but can be appropriately determined depending on the relationship with the outside air temperature.
As shown in FIG. 3, the repair material has a fixed length at the tip portion of the repair material 6, that is, at the end portion in the main pipe direction of the repair tube, in order to improve the finish of repair at the joint between the fitting tube and the main tube. Since the repair material 6 'protrudes from the mounting pipe into the main pipe at the time of construction and is hardened by using the repair material in which another repair material 6' is piled up, after the removal of the repair device main body tube, the projecting repair is performed. By cutting out the material 6 ', the work can be performed without making a gap between the mounting pipe and the main pipe. In repairing the joint between the mounting pipe and the main pipe, the conventional repairing material 6 in which a fixed length of the repairing material 6 ′ is not overlapped with the tip of the repairing material 6 is bonded to the bent portion of the mounting pipe. The repair material worked so as to pull the tip of the repair material into the inside of the mounting pipe, leaving a gap at the joint between the mounting pipe and the main pipe. , Can be reliably repaired by pressure bonding. The length of the repair material 6 'can be appropriately selected as needed, but is about 40 cm to 20 cm, preferably about 30 cm.
In addition, the repair material is used by wrapping the repair material around with a synthetic resin sheet, for example, a polyethylene sheet in order to reduce the resistance at the time of insertion. As shown in FIG. 4, the front end portion of the polyethylene sheet enclosing the repair material is perforated in advance so as to remove a portion where the sheet is expected to remain. In the process, the polyethylene sheet breaks from the perforation and separates, so that the end of the polyethylene sheet does not remain after the application.
A synthetic resin sheet for inserting a pipe, for example, a polyethylene sheet, has a large number of holes a through which the synthetic resin impregnated in the repair material can penetrate into the inner surface of the pipe.
As shown in FIG. 7, the main tube 1 of the pipe inner surface repairing apparatus of the present invention is a bent pipe, for example, a tow wire of an insertion means 22 for the main pipe 1 provided on the main pipe 21 in the mounting pipe 11. 7 is attached to the towing ring 5, and the wire is pulled and inserted into a predetermined position. After the insertion, the main tube is inflated by injecting air, and the repair material impregnated with the curable resin binder placed on the outer periphery of the main tube is pressure-fixed to the inner surface of the mounting tube. After the repair material is fixed by pressure bonding, the air in the main body tube 1 is released, and the main body tube is taken out. Since the diameter of the main body tube 1 is smaller than the diameter in the conduit of the mounting tube, it can be taken out very easily.
Then, by using the repair material shown in FIGS. 3 and 5, and furthermore, the synthetic resin sheet for pipe insertion shown in FIGS. 4 and 6, for example, the polyethylene sheet wrapping repair material, the inner surface of the bent attachment pipe 11 in FIG. As shown in the schematic cross-sectional view showing the repair state, the repair material does not have a trumpet-like curl or wrinkle, does not create a gap between the mounting pipe and the main pipe, has no residue such as an inserted polyethylene sheet, It is crimped on the inner surface of the pipeline, and the inner surface of the pipeline is repaired with good finish.
[0008]
【Example】
Hereinafter, the present invention will be described with reference to Examples, but the present invention is not limited to these Examples.
Example 1
The cracks on the inner surface of the mounting tube 11 having a diameter of 150 mm were repaired. A body tube 1 made of non-adhesive polyvinyl chloride resin having a diameter of φ100 mm is used, and an epoxy resin and an amine curing agent are added to a laminated sheet composed of glass cloth, robin glass cloth, and glass cloth on the outer periphery of the body tube 1 for 10 times. : Repair material 6 impregnated with a resin composition containing at a ratio of 5 is placed, inserted into a crack position on the inner surface of mounting tube 11, and air is injected from air inlet 2 of main tube 1. Then, wrinkles of the cloth bent inward at the curved portion of the mounting tube were pressed down as they were, a smooth curve (curved surface) was constructed, and the repair material 6 was fixed to the inner surface of the mounting tube 11 by pressure bonding. As shown in FIG. 8, the inner surface of the mounting pipe was free of wrinkles and finished well, and the repair material 6 was fixed by pressure bonding.
Example 2
As shown in FIGS. 4 and 6, the inner surface of the mounting pipe was repaired in the same manner as in Example 1 except that a polyethylene sheet for pipe insertion of a repair material having a perforation at 3 cm from the tip was used. Was. Since the perforations are preliminarily formed in the polyethylene sheet for pipe insertion, the polyethylene sheet breaks from the perforations and separates from the mounting pipe in the process of pressing the repair material, and the mounting pipe has no residue of the polyethylene sheet. It was good.
Example 3
As shown in FIG. 3 and FIG. 5, the mounting pipe was replaced with the repair pipe 6 in the same manner as in Example 1 except that the repair pipe 6 was covered with a second repair patch 6 ′ at a position 30 cm from the front end. The inside was repaired. The repair material 6 ′, which is superimposed and covered at the tip of the repair material 6, protrudes from the mounting pipe into the main pipe and is hardened. The protruding repair material 6 'was cut off. The repair material was pressed between the main pipe and the mounting pipe without gaps, and the finish was good.
[0009]
【The invention's effect】
The main body tube of the pipeline inner surface repair apparatus of the present invention is a tube smaller than the pipeline diameter of the pipeline to be repaired, and the repair material is a non-adhesive, high expansion coefficient, tube made of a resin having a large tensile strength. The crimping and fixing of the repair material is performed very easily and securely, the fiber of the repair material does not become a trumpet shape at the bent portion of the pipe, and the finish of the main body tube after the repair work is performed without wrinkles. It is very easy to pull out, and it is very easy to repair the inner surface of the bent and finished conduit.
By using a polyethylene sheet for pipe insertion of a repair material having a perforation at a desired position of the tip portion, it is possible to perform a repair with a good finish with no residue of the polyethylene sheet, and further to the tip portion of the repair material. By overlaying and covering the repairing material, the repairing material is pressure-bonded between the mounting pipe and the main pipe without any gap, and has a good finish, and has an excellent effect.
[0010]
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a pipeline inner surface repairing device of the present invention.
FIG. 2 is a schematic view showing a state in which a repair material is placed on the outer periphery of a main body tube of the pipeline inner surface repair device of the present invention.
FIG. 3 is a schematic view of a repair material in which a repair material having a predetermined length is further stacked on a tip portion of the repair material of the present invention.
FIG. 4 is a schematic view of a repair material covered with a pipe insertion sheet having a perforation at its distal end on the outer periphery of the repair material of the present invention.
FIG. 5 is a schematic diagram of a pipe line inner surface repair apparatus in which a repair material having a fixed length further superimposed thereon as a repair material according to the present invention is placed.
FIG. 6 is a schematic diagram of a pipe line inner surface repair apparatus in which a repair material covered with a polyethylene sheet for pipe insertion with a perforated end portion mounted on the outer periphery of the repair material of the present invention is placed.
FIG. 7 is a schematic sectional view showing a state where a main body tube of the pipeline inner surface repairing apparatus of the present invention is inserted into a pipeline.
FIG. 8 is a schematic cross-sectional view showing a state in which a pipe inner surface is repaired by using the pipe inner surface repair device of the present invention.
[Explanation of symbols]
1. Main body tube 2. 2. air inlet Main tube front end 3 '. Body tube rear end 4.4 '. Tube clamp 5.5 '. Tow ring 6.6 '. Repair materials 7. 7. Towing wire 8. Polyethylene sheet for tube insertion 10. Perforation of polyethylene sheet for tube insertion Mounting pipe 21. Main pipe 22. Means for inserting body tube

Claims (12)

It consists of a non-adhesive synthetic resin main body tube whose diameter is smaller than the diameter of the inner surface of the pipe to be repaired, both ends of which are closed, and an air inlet at one end thereof, and a repair material on the outer peripheral surface of the synthetic resin main tube. A bent pipe inner surface repairing device, comprising mounting a crimped pipe on the inner surface of a pipe. 2. The pipeline inner surface repair apparatus according to claim 1, wherein the diameter thereof is 1/2 to 3/4 of the diameter of the pipeline inner surface to be repaired. 2. The apparatus according to claim 1, wherein the non-adhesive synthetic resin body tube is a polyvinyl chloride tube. 2. The pipe inner surface repair apparatus according to claim 1, wherein the repair material is wrapped around a pipe-inserting synthetic resin sheet having a perforated end portion. The pipe inner surface repairing apparatus according to claim 4, wherein the pipe-inserting synthetic resin sheet is a polyethylene sheet. 2. The pipe inner surface repair apparatus according to claim 1, wherein the repair material further comprises a repair material superposed on a tip portion thereof. 2. The pipe inner surface repair apparatus according to claim 1, wherein the bent pipe is an attachment pipe. A repair material is attached to a main body tube of the pipeline inner surface rehabilitation device according to claim 1, the tube is introduced into a bent pipeline, and air is injected from an air inlet of the main body tube of the pipeline inner surface rehabilitation device. Bending characterized by expanding the main body tube of the road inner surface repairing device, crimping the inner surface repairing material of the conduit and bonding and fixing it to the inner surface of the conduit, then bleeding air from the main body tube and taking out the main body tube from the conduit. Pipe inner surface repair method. 8. The method for repairing the inner surface of a bent pipe according to claim 7, wherein the repair material is wrapped around a pipe-inserting synthetic resin sheet having a perforated end. 8. The method for repairing the inner surface of a bent pipe according to claim 7, wherein the repair material is obtained by further laminating a repair material on a tip portion thereof. A repair material for repairing the inner surface of a bent pipe wrapped around a synthetic resin sheet for pipe insertion with a perforation at its tip. A repair material for repairing the inner surface of a bent pipe, which is made by superimposing a repair material on its tip.

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