KR101703192B1 - Repair reinforcement apparatus for superannuated pipe and repair reinforcement thereof - Google Patents

Repair reinforcement apparatus for superannuated pipe and repair reinforcement thereof Download PDF

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Publication number
KR101703192B1
KR101703192B1 KR1020160014292A KR20160014292A KR101703192B1 KR 101703192 B1 KR101703192 B1 KR 101703192B1 KR 1020160014292 A KR1020160014292 A KR 1020160014292A KR 20160014292 A KR20160014292 A KR 20160014292A KR 101703192 B1 KR101703192 B1 KR 101703192B1
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KR
South Korea
Prior art keywords
repair
reinforcement
heater
tube
heater line
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Application number
KR1020160014292A
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Korean (ko)
Inventor
정재현
Original Assignee
주식회사 지성이엔지
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Priority to KR1020160014292A priority Critical patent/KR101703192B1/en
Application granted granted Critical
Publication of KR101703192B1 publication Critical patent/KR101703192B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26—Lining or sheathing of internal surfaces
    • B29C63/34—Lining or sheathing of internal surfaces using tubular layers or sheathings
    • B29C63/36—Lining or sheathing of internal surfaces using tubular layers or sheathings being turned inside out
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1651—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being everted
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1656—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section materials for flexible liners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/18—Appliances for use in repairing pipes

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Pipe Accessories (AREA)

Abstract

A method for repairing a superannuated pipe using a tube for repair and reinforcement is a method of repairing a superannuated pipe using a superannuated pipe repairing apparatus comprising a turner which reverses and inserts a reinforced fiber tube for repair and reinforcement into the superannuated pipe, and a heater supply unit which hardens the reinforced fiber tube for repair and reinforcement using a heater line. The method of repairing the superannuated pipe using the superannuated pipe repairing apparatus comprises the steps of: inspecting an internal state of the pipe; removing scale and foreign substances from an inner surface of the pipe; winding a safety strip, the reinforced fiber tube for repair and reinforcement, and the heater line on the turner; inserting, by the turner, the reinforced fiber tube for repair and reinforcement, which is reversed, into the pipe; hardening, by the heater supply unit, the reinforced fiber tube for repair and reinforcement inserted into the pipe; and cutting both end portions of the reinforced fiber tube for repair and reinforcement when the reinforced fiber tube for repair and reinforcement is completely hardened.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a repair method,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to repair with a worn-out pipe, and more particularly, to a worn-out repair method and a repairing apparatus for repairing an aged pipe by using a repair-reinforcing tube impregnated with a thermosetting resin.

As the urbanization progressed, various pipelines including the sewage pipelines and the sewage pipelines were buried in the city, and as time went by, the aging and the poor pipelines were increasing. These aging and defective pipelines are caused by corrosion, which causes a huge amount of water to leak, which causes greenhouse water to contaminate the drinking water and cracks in the pipelines, which may cause sewage to flow out of the pipeline and contaminate the soil and groundwater There is a problem.

In this way, when repairing old and poor pipelines, unrecorded repair methods have been developed as an alternative to the increase in social loss costs such as huge construction cost, traffic congestion, safety accidents and environmental problems due to existing excavation works. The construction method has been designated as a new technology, and it is actively applied to sewer maintenance business of Hang River water system and leasehold private leasehold (BTL) project.

On the other hand, non-excavated full repair method is used to repair the deterioration and bad pipeline. Un-excavated total repair method is a method with many advantages in terms of workability, reliability, and economy because it does not require work such as digging roads to repair pipelines. In the unreinforced full repair method, the repair and reinforcement tube impregnated with the thermosetting resin is cured in accordance with the length of the pipe to be repaired and the allowance length according to the method, and the process is terminated by punching both ends and connecting pipes.

In the method of inserting the tube for maintenance and reinforcement impregnated with the thermosetting resin into the pipe, a tube for maintenance and reinforcement is loaded in a reversing tank of a large capacity, and when the air pressure (half voltage) (Reverse voltage) method using water pressure (half-voltage) instead of air pressure by using a reversing base, and a method of reversing the water pressure using a reversing pedestal, There is a pulling method in which one end of a repair and reinforcement tube is bundled and then pulled into a pipe by using a pulling device to blow air into the pipe to expand it simultaneously.

On the other hand, when the maintenance or reinforcement tube is reversed or traction is completed, the maintenance and reinforcement tube is cured. Conventionally, the tube hardening method for repairing reinforcement cures the tube by the steam heat supplied from the boiler. However, in the method of curing the repair and reinforcement tube using the boiler, there is a problem that a large amount of air must be continuously supplied for a long time in order for the steam heat supplied from the boiler to move from the inlet of the tube to the end of the tube have. In addition, as the heat of the steam comes into contact with the air, the heat is cooled and heat loss occurs in the course of going to the end of the repair and reinforcement tube. When the steam heat is cooled, condensation water is generated in the tube, There is a problem in that the adhesion of the wall surface of the pipe is lowered and the tube is lifted in some sections.

Accordingly, the present applicant has proposed the present invention in order to solve the above-mentioned problems. As a prior art document related thereto, Korean Patent Registration No. 10-0791378 (entitled " Site registration method, registration date: December 27, 2007).

It is an object of the present invention to provide a repairing and reinforcing tube impregnated with a thermosetting resin, in particular, an insulated Y-tube, while inserting a thermosetting resin-impregnated tube into a deteriorated tube, and discharging heated air to cure the tube inside the tube And a repairing method and a repairing device using the repairing and reinforcing tube capable of improving the hardening quality of the tube by minimizing the generation of condensed water when the tube is cured by positioning the heater line.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

According to the present invention, the above object can be accomplished by providing a repairing apparatus comprising a deflector for inverting and inserting the reinforcing fiber for repair and reinforcement in an aged pipe, and a heater supplier for hardening the reinforcing fiber for repair using the heater line, A maintenance method for repairing an aged pipeline by using an internal condition of the pipeline; Removing scale and foreign matter on the inner surface of the channel; Winding the safety band, the reinforcing fiber YouTube for repair and reinforcement, and the heater line in the inverter; Inserting the reinforcing fiber YouTube for repair and reinforcement into the pipeline; The heater supply unit curing the reinforcing fiber YouTube for repair and reinforcement inserted in the pipeline; And cutting and finishing both ends of the reinforcing fiber YT for repair and reinforcement when the reinforcing fiber YT for repair and reinforcement is completed. And a repairing method using a repair tube reinforced with a repair tube.

The reinforcement yarn is formed by forming a nonwoven fabric on both sides of the fabric by performing a needle punching operation using a general fiber and a reinforcing fiber in a fabric made of carbon fiber, glass fiber, reinforced polyethylene fiber, reinforced polyester fiber or aramid fiber , A film is coated on one side of the nonwoven fabric on both sides of the fabric, and a nonwoven fabric on the other side of the fabric is impregnated with a thermosetting resin, and the common fiber is any one of polyester fiber, polyetherene fiber, and polyethylene terephthalate fiber And the reinforcing fiber may be any one of carbon fiber, glass fiber, reinforced polyethylene fiber, reinforced polyester fiber, and aramid fiber.

And fixing the safety band, the reinforcing fiber YouTube for repair and the heater line to the reverser before the winding step.

The method may further include inserting the heater line into the inside of the reinforcing fiber YouTube for repair and reinforcement before the step of curing the repairing reinforcing fiber for YouTube.

In the step of inserting the reinforcing fiber for YouTube for maintenance and reinforcement and the step of curing the reinforcing fiber for reinforcement for maintenance, high pressure air can be received from the air compressor of the repairing device.

According to another aspect of the present invention, there is provided a reburning apparatus comprising: a reburning tube for winding up a repairing reinforcement tube so that the repairing reinforcement tube is reversely inserted into the tube; A heater supply unit for supplying heated air to the inside of the repair and reinforcement tube after the repair and reinforcement tube is reversely inserted in the pipe to harden the repair and maintenance tube; And an air compressor for injecting high-pressure air of at least one of the inverter and the heater supply unit.

The heater supply unit includes a heater for generating heat, a heater line feeder connected to the heater to receive heat from the heater, and a heater line feeder for winding the heater line feeder on the heater line feeder, And a heater line disposed inside the repairing and reinforcing tube and spraying the heated air delivered through the heater line feeder toward the repairing and reinforcing tube.

The maintenance and reinforcement tube is connected to the inverter through a safety belt, and the heater line may be connected to the safety belt.

When the heater line feeder is rotated in the direction in which the heater line is unrotated and the inverter is rotated in the winding direction opposite to the heater line feeder, the maintenance-enhancing tube and the heater line may be wound on the reverser have.

When the reversing device is reversely rotated, the maintenance-reinforcing tube and the heater line are released from being wound, and the maintenance-reinforcing tube from which the winding is released is reversely inserted into the pipe and the heater line is again wound around the heater line feeder When the repair and reinforcement tube is inserted into the duct for a predetermined length, the winding from the reinforcement is released so that the heater line wound on the heater line feeder can be inserted into the repair and reinforcement tube .

The heater line may include a plurality of ejection holes for ejecting the heated air transferred through the heater line feeder.

When the repair and reinforcement tube is hardened inside the duct by the heated air ejected from the heater line, air can be injected into the repair and reinforcement tube from the air compressor.

The air compressor injects high pressure air into the inverter when the reinforcing fiber for YouTube for refinement is inverted and injects high pressure air into the heater supplying part when the reinforcing fiber for YouTube for refinement is cured.

The heater line feeder has a hollow tube shape, in which the heated air supplied from the heater flows into the heater line feeder provided in the hollow tube shape, and the heater line feeder provided in the hollow tube shape is connected to the heater Line. ≪ / RTI >

The boiler may further include a boiler used in parallel with the heater supply unit as a means for supplying heat for curing the repair and strengthening tube, thereby shortening the working time or rapidly raising the temperature of the repair and maintenance tube.

According to another aspect of the present invention, there is provided a method for repairing a worn-out pipe, comprising the steps of: inserting a repair reinforcement tube in the pipe; And a step of curing the repairing and reinforcing tube inserted into the pipe, wherein the heater supply part of the repairing device is installed in the pipe repairing part.

The repairing method and the repairing apparatus of the present invention is different from the prior art in which a repairing and reinforcing tube is used to repair the repairing tube and the repairing and strengthening tube is cured in the tube by using a high- Line is placed inside the tube inserted in the pipeline, the repair and reinforcement tube is not cured, and the repair and reinforcement tube is completely bonded to the inner wall of the pipe, thereby minimizing the generation of condensed water during the repair and reinforcement tube curing, The curing quality of the tube for use can be improved.

In addition, since the repairing and repairing apparatus of the present invention uses a heater to cure the repairing and reinforcing tube, the preheating time is greatly reduced and economical, unlike the prior art, and the time required for the repairing and reinforcing tube to harden Can be greatly reduced.

FIG. 1 is a flowchart illustrating a repair method using a repair tube according to an embodiment of the present invention. Referring to FIG.
FIG. 2 is a block diagram of a wastewater treatment apparatus using a repair and maintenance tube according to an embodiment of the present invention. Referring to FIG.
FIG. 3 is a view for explaining the winding process of the maintenance and reinforcement tube and the heater line in the reverser shown in FIG. 2. FIG.
Figs. 4 and 5 are views for explaining that the repair and reinforcement tube shown in Fig. 2 is inserted into the pipe.
Fig. 6 is a diagram for explaining a configuration of the heater supply unit shown in Fig. 2. Fig.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various variations of the drawings are expected. Thus, the embodiment is not limited to any particular form of the depicted area, but includes modifications of the form, for example, by manufacture.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a repair method and repair apparatus using a tube for repair and reinforcement according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a flow chart illustrating a repair method using a repair tube according to an embodiment of the present invention. FIG. 2 is a schematic view of a repair apparatus using a repair tube according to an embodiment of the present invention. FIG. 3 is a view for explaining the process of winding the maintenance and reinforcement tube and the heater line in the inverter shown in FIG. 2, and FIGS. 4 and 5 are views for explaining a method of inserting the reinforcement- And Fig. 6 is a view for explaining the configuration of the heater supply unit shown in Fig. 2. Fig.

 First, referring to FIG. 2 to FIG. 6, a repair apparatus 100 (hereinafter referred to as "repair apparatus") using a repair and reinforcement tube will be described.

 2 to 6, the repairing apparatus 100 according to the embodiment of the present invention is constructed such that the reinforcement-use YouTube 102 for repair and reinforcement is wound and the reinforcement- A heater supply unit 120 for curing the reinforcing fiber YouTube 102 for maintenance and repair and an air compressor 130 for injecting air into the inverter 110 and the heater supply unit 120, .

Here, the reinforcing fiber YouTube 102 for repair and reinforcement is a member used for repairing a deteriorated pipe 101, which is used for repairing the deteriorated pipe 101, and is inserted inward in the deteriorated pipe 101. The reinforcing fiber YouTube 102 for repair and reinforcement may be formed in a different material from the inner surface and the outer surface. Specifically, it is preferable that the inner surface of the reinforcing fiber YouTube 102 for repair and reinforcement is formed of a material having excellent adhesion so as to facilitate adhesion to the wall surface of the channel 101, It is preferable to coat the reinforcement-use YouTube 102 to prevent penetration into the interior of the reinforcement-use-reinforcement-use-reinforcement-use-reinforcement-reinforcement-use-reinforcement-reinforcement- In addition, the reinforcing fiber YouTube 102 may be manufactured by performing a needle punching operation using plain fibers and reinforcing fibers in a fabric made of any one of carbon fiber, glass fiber, reinforced polyethylene fiber, reinforced polyester fiber, and aramid fiber, Thereby forming a nonwoven fabric. The reinforcing fiber may be one of a carbon fiber, a glass fiber, a reinforced polyethylene fiber, a reinforced polyester fiber, and an aramid fiber. The reinforcing fiber may be one of a polyester fiber, a polyether fiber, and a polyethylene terephthalate fiber. Lt; / RTI > The nonwoven fabric on one side of the reinforced composite fiber fabric on which the nonwoven fabric is formed on both sides is coated with a film and the nonwoven fabric on the other side of the fabric is impregnated with a thermosetting resin. For reference, each of the ordinary fibers and the reinforcing fibers may be composed of any one of long fibers, short fibers, mixed fibers of long fibers and short fibers.

Meanwhile, in this embodiment, the reinforcing fiber YouTube which exhibits the above-mentioned excellent performance is used as a tube for maintenance and reinforcement, but the present invention is not limited to this but other types of tubes for repair and reinforcement can also be used.

The inverter 110 winds up the reinforcing fiber YouTube 102 for maintenance and reinforcement, and reverses the reinforcing fiber YouTube 102 for repair reinforcement inserted into the pipeline 101. The inverter 110 is connected to the reinforcing fiber YouTube 102 for maintenance and repair via the safety belt 112. In addition, the inverter 110 is provided with a window 114 for grasping whether or not the reinforcing fiber YouTube 102 for maintenance and reinforcement and the heater line 124 to be described later are wound. The window 114 is provided in the form of a window with a transparent material, the size of which depends on the size of the turn 110. Such a window 114 is provided at a position where both the winding state of the one side of the inverter 110, that is, the safety band 112, the reinforcing fiber YouTube 102 for repair and reinforcement, and the heater line 124 can be seen .

The heater supplying unit 120 hardens the reinforcing fiber YouTube 102 for repair and reinforcement inside the reinforcing fiber YouTube 102 for repair and reinforcement after the reinforcing fiber YouTube 102 for repair and reinforcement is reversed and inserted in the pipeline 101. 5, the heater supply unit 120 includes a heater 122, a heater line feeder 123, and a heater line 124. [ The heater 122 is equipped with a heat wire inside and generates hot heat by electricity supplied from the outside. At this time, the heater 122 is connected to the heater line feeder 123 and supplies hot heat to the heater line feeder 123. The heater line feeder 123 is a member that receives hot heat from the heater 122 as described above, and the heater line 124 is wound. The heater line feeder 123 is formed in the shape of a cylindrical tube having a hollow interior, and a heater line 124 is connected to one side of the hollow cylinder. The heater line 124 is in communication with the heater line feeder 123 whose inside is hollow. Thus, the heated air supplied from the heater 122 is supplied to the one end of the heater line feeder 123 having the hollow interior formed therein, and the heated air supplied from the heater 122 is communicated with the heater line feeder 123 And is transmitted to the heater line 124. A handle 126 is provided at the end of the heater line feeder 123, which is formed in the shape of a cylindrical tube having a hollow interior. At this time, the other end of the heater line feeder 123 provided with the handle 126 is formed in a clogged form. The operator can manually wind the heater line 124 to the heater line feeder 123 by using the handle 126. [ At this time, the handle 126 is formed in the form of a knob which is easily gripped by the operator, and is provided so as to be rotatable clockwise or counterclockwise to wind the heater line 124 to the heater line feeder 123 or to release the winding.

Meanwhile, in another embodiment of the present invention, a boiler (not shown) for generating steam in parallel with the heater supply unit 120 may be used as a means for supplying heat for curing the reinforcement- . Thus, when the heater supply unit 120 and the boiler are used in parallel, the operation time can be shortened or the temperature can be quickly raised in a short period of time.

The air compressor 130 is connected to the inverter 110 or the heater supply unit 120 to inject air. In other words, the air compressor 130 inverts or hardens the reinforcing fiber YouTube 102 for repair reinforcement by injecting compressed air, that is, high-pressure air, into the inverter 110 or the heater supply unit 120. Here, valves 111 and 121 are provided between the air compressor 130 and the inverter 110 according to an embodiment of the present invention, and between the air compressor 130 and the heater supply unit 120, respectively. The valves 111 and 121 may be provided in the form of a general check valve. When any one of the valves 111 and 121 is locked, high pressure air is injected into only one of the inverter 110 and the heater supply unit 120. In other words, the air compressor 130 is selectively connected by the inverter 110 or the heater supply unit 120 and the valves 111 and 121, and when the reinforcement island YouTube 102 for the repair and reinforcement is reversed, the air compressor 130 The valve 121 between the air compressor 130 and the heater supply part 120 is locked and the valve 111 between the air compressor 130 and the inverter 110 is locked during the curing of the reinforcing fiber YouTube for repair and reinforcement.

2, compressed air, that is, high-pressure air, is transferred to the inverter 110 and the heater supply unit 120 by the air compressor 130. As shown in FIG. At this time, only the high-pressure air may be delivered to the reinforced-fiber YouTube 102 for repair reinforcement inserted into the pipeline 101 in the inverter 110, and the high-pressure air and the heat may be transmitted together. The reinforcing fiber YouTube 102 for repair and reinforcement inserted into the pipeline 101 from the heater supply unit 120 is formed with high pressure air so as to be hardened and completely adhered to the inner wall of the pipeline 101 Heat must be transferred.

2 to 6, the configuration of the maintenance apparatus 100 according to an embodiment of the present invention will be described more specifically.

Referring to FIGS. 2 to 6, the inverter 110 inverts the reinforcing fiber YouTube 102 for repair reinforcement inside the pipe 101. At this time, a safety strip 112 is connected to the inverter 110. The reinforcement 110 is connected to one end of the safety belt 112 and the reinforcing fiber YouTube 102 for repair and reinforcement wound around the reeling roll 103 is connected to the other end. The winding roll 103 refers to a member that winds up the reinforcing fiber YouTube 102 for repair and reinforcement. Meanwhile, a heater line 124 is connected to one end of the safety strap 112 to which the reinforcing fiber YouTube 102 for repair and reinforcement is connected. Here, in the inverter 110 according to an embodiment of the present invention, the safety band 112, the reinforcing fiber YouTube 102 for repair and reinforcement, and the heater line 124 are wound together. Specifically, the reinforcing fiber YouTube 102 for repair and reinforcement and the heater line 124 are fastened to the safety belt 112 connected to the inverter 110. When the winding in which the heater line feeder 123 wound around the heater line feeder 123 is rotated in the reverse direction and the winding in which the inverter 110 is opposite to the heater line feeder 123 is rotated in the forward direction, In the inverter 110, the safety band 112, the reinforcing fiber YouTube 102 for repair and reinforcement, and the heater line 124 are wound in turn.

When the inverter 110 is reversely rotated, the heater line 124 wound around the inverter 110, the reinforcing fiber YouTube 102 for repair and reinforcement, and the safety belt 112 are loosened in order to be wound up from the inverter 110 Is released. The heater line 124 wound around the inverter 110 is piled up on the bottom surface of the inverter 110 and the reinforcing fiber YouTube 102 for repair and reinforcement is inserted into the pipeline 101. At this time, the high-pressure air of the air compressor 130 is used to invert the reinforcing fiber YouTube 102 for repair and reinforcement into the pipeline 101. In other words, when high-pressure air is introduced into the inverter 110 formed with the air inlet 132 formed at one side of the inverter 110 by the air compressor 130, The YouTube 102 is invertedly inserted into the inside of the pipeline 101.

When the inverter 110 is reversely rotated so that a part of the reinforcing fiber YouTube 102 for repair and reinforcement is reversely inserted into the inside of the pipeline 101, the heater line 124 wound and unwound from the inverter 110 is refitted And is located in the interior of the reinforced-fiber YouTube 102 for use. In other words, when the reinforcing fiber fork 102 for repair and reinforcement wound around the inverter 110 is inserted in the pipe 101 in a reverse direction, the heater line 124 is unwound from the inverter 110, (110). At this time, the operator rotates the handle 126 of the heater supply unit 120 while checking the window 114 to wind the heater line 124 on the heater line feeder 123. The heater line 124 wound around the heater line feeder 123 is inserted into the pipeline 101 after the reinforcing fiber YouTube 102 for repair and reinforcement is reversely inserted into the pipeline 101 to some extent (for example, about 1/2) Reinforcement-use YouTube 102 for repair and reinforcement along with the reinforcing fiber-reinforced concrete member 112.

When the reinforcing fiber YouTube 102 for repair and reinforcement is completely positioned at the repairing position in the pipeline 101, the reinforcing fiber YouTube 102 for repair and reinforcement is completely brought into close contact with the inner wall of the pipeline 102, (102). At this time, the reinforcing fiber YouTube 102 for repair and reinforcement is cured by the heater line 124 positioned inside the repairing reinforcing fiber fork 102 for repairing reinforcement. As described above, the heated air supplied from the heater 122 is transmitted to the heater line 124 through the heater line feeder 123, and the transferred heated air is ejected from the heater line 124, The reinforcing fiber YouTube 102 adheres to the inner wall of the conduit 101 and hardens. The heater line 124 is provided with a plurality of ejection holes 125. The ejection hole 125 is formed only at the end of the heater line 124, that is, the heater line 124 positioned inside the reinforcing fiber YouTube 102 for repair and reinforcement. 4, when the reinforcing fiber YouTube 102 for repair and reinforcement is reversely inserted into the inside of the pipeline 101 requiring repairing, a plurality of ejection holes 125 formed in the heater line 124 The heated air is ejected. The heated air ejected from the plurality of ejection holes 125 is supplied from the heater 122 to be transmitted to the heater line 124 through the heater line feeder 123.

The heated air of the heater 122 is transmitted to the entire heater line 124 by the air compressor 130. Here, the heated air ejected from the heater line 124 causes the reinforcing- Pressure air is constantly supplied to the interior of the pipeline 101, that is, the inside of the reinforcing fiber YouTube 102 for repair reinforcement, by the air compressor 130 when the air compressor 102 is cured. Accordingly, the reinforcing fiber YouTube 102 for repair and reinforcement can be hardened while being completely in close contact with the inner wall of the pipeline 101 without any crushed portions. 3 and 4 illustrate that the air compressor 130 and the heater 122 are not connected to each other. However, the present invention is not limited thereto. Accordingly, the reinforced-fiber YouTube 102 for repair and reinforcement according to an embodiment of the present invention is completely bonded to the inner wall of the obsolete pipe line 101 requiring repair, and since the heat of the heater 122 is used, It is possible to minimize the generation of condensed water during curing of the reinforced-fiber YouTube 102, thereby improving the quality of the reinforced-fiber YouTube 102 cured in the pipeline 101.

A repair method using a repair tube according to an embodiment of the present invention will be described with reference to the above-described configuration.

Referring to FIG. 1, in the repair method using the repair and reinforcement tube according to an embodiment of the present invention, the inverter 110 inverts and inserts the reinforcement-use YouTube 102 for repair and reinforcement into the pipeline 101 Step S140 and curing the reinforcing fiber YouTube 102 for repair reinforcement inserted in the pipeline 101 (S180).

Referring to FIGS. 1 to 6, a repair method using a repair and reinforcement tube according to an embodiment of the present invention first checks the internal state of the pipe 101 (S110). In other words, the internal state of the pipeline 101 is checked by using a video camera (not shown) such as a CCTV, and the inside of the pipeline 101 to be repaired is determined, . If the size of the portion to be repaired in the pipeline 101 is large or the repair portion is deeply deeper in the step S110 of checking the inner state with respect to the pipeline 101, The repair is done primarily by using other repair materials.

Then, in step S110 of checking the inner state of the pipeline 101, if the part to be repaired or the position to be repaired is confirmed, the inner wall surface of the pipeline 101 is cleaned. In other words, scale and foreign matter are removed from the inner surface of the pipe 101 that requires repair (S120). A device (not shown) capable of spraying water at a high pressure is used to clean the inner surface of the pipeline 101.

Then, the safety strip 112, the reinforcing fiber YouTube 102 for repair and reinforcement, and the heater line 124 are fastened to the inverter 110 (S130). One end of the safety belt 112 is fixedly connected to the center of the inverter 110 and the other end of the safety belt 112 is fastened with the reinforcing fiber YouTube 102 and the heater line 124 for repair and reinforcement.

Then, after the reinforcing fiber YouTube 102 for repair and reinforcement and the heater line 124 are fastened (S130) to the safety belt 112 of the inverter 110, the direction in which the inverter 110 is wound, that is, The safety band 112, the reinforcing fiber YouTube 102 for repair and reinforcement, and the heater line 124 are wound on the electric 110 (S140). Here, it is preferable that the length of the reinforcing fiber YouTube 102 for repair reinforcement that is wound around the inverter 110 is longer than the length of the pipe 101 to be repaired. This is because it is necessary to consider the margin before the reinforcement-use YouTube 102 for repair and reinforcement enters the pipeline 101 to be repaired and at the end of the pipeline 101.

At this time, the air compressor 130 is connected to the air inlet 132 of the inverter 110. The heater line 124 connects the heater 122 and the air compressor 130 to the heater line feeder 123 so that heated air can be supplied. When the inverter 110 is used, the valve 121 provided between the heater supply unit 120 and the air compressor 130 is locked. When the heater supply unit 120 is used, the inverter 110 and the air compressor 130 ).

Thereafter, the inverter 110 is reversed to release the winding of the safety belt 112, the reinforcing fiber YouTube 102 for maintenance and repair, and the heater line 124 from the inverter 110, (S150). At this time, the heater line 124, which is unwound from the inverter 110 by the reverse rotation of the inverter 110, is turned on until the reinforcing fiber YouTube 102 for repair and reinforcement is inserted into the pipe 101 to some extent Lt; RTI ID = 0.0 > 110 < / RTI > At this time, when the heater line feeder 123 is rotated using the handle 126 provided in the heater line feeder 123, the heater line 124 stacked on the bottom of the inverter 110 is wound on the heater line feeder 123 .

At this time, when the reinforcing fiber YouTube 102 for repair and reinforcement is inserted in the pipeline 101 for a predetermined length (about 1/2), the heater line 124 wound around the heater line feeder 123 is inserted into the reinforcing- (S160). Since the heater line 124 is connected to the safety strip 112 and the reinforcing fiber YouTube 102 for repair and reinforcement, when the reinforcing fiber YouTube 102 for repair and reinforcement is inserted into the duct 101, the heater line 124 And is naturally inserted into the interior of the repair and reinforcement tube 102.

The heating line 124 is inserted into the interior of the reinforcing fiber YouTube 102 for maintenance and reinforcement and then heated by the heated air of the heater 122 supplied to the heater line feeder 123 communicated with the heater line 124, The reinforcing fiber-reinforced YouTube 102 is cured (S170). In other words, the heater line 124 is supplied with the heated air delivered from the air compressor 130 and the heater 122, and the heated air supplied thereto is supplied to the plurality of ejection holes 125 provided in the heater line 124, Reinforcing fiber-reinforced-YouTube 102 is cured through the reinforcing fiber-reinforced-fiber-reinforcing-use-reinforcing-use-YouTube 102 to adhere to the inner wall of the pipeline 102. The air compressor 130 continuously supplies high pressure air into the interior of the reinforcing fiber YouTube 102 for maintenance and repair because the reinforcing fiber YouTube 102 for repair and reinforcement is inverted inside the duct 101, So that the reinforcing fiber-reinforced YouTube 102 is completely adhered to the inner wall of the conduit 101.

Then, the reinforcing fiber YouTube 102 for repair and reinforcement, which has been cured in the pipeline 101, is cut and finished (S180). As described above, the length of the reinforcing fiber YouTube 102 for repair and reinforcement has a length that is longer than the length of the pipeline 101 to be repaired. The reinforcing fiber YouTube 102 for repair and reinforcement is reversed and inserted into the portion of the pipeline 101 where repair is required, and after the reversed reinforced reinforcing fiber YouTube 102 is cured, the reinforcing fiber YouTube 102 for repair and reinforcement Cut both ends to finish.

According to the construction and the method of the present invention, the repairing method and the repairing device using the repairing and repairing tube according to an embodiment of the present invention can repair the repairing and repairing Youtube The heater line of the heater is positioned inside the tube inserted in the pipe, unlike the prior art in which the high-pressure steam column is used for curing in the pipeline, and there is no part where the repairing reinforcing tube is uncured, It is possible to improve the curing quality of the reinforcing fiber YTU for maintenance and repair by minimizing the generation of condensed water during the curing of reinforcing fiber YTA for repair and reinforcement.

In addition, since the repairing and repairing apparatus using the reinforcing fiber of the present invention hardens the repairing and reinforcing tube by using a heater, the preheating time is greatly reduced and economical, unlike the prior art, It is possible to greatly reduce the time required for the operation.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

100: Repairing equipment with repair tube using repair tube
101: Pipeline 102: Maintenance and reinforcement tube
110: Reversal
112: Safety belts
120: heater supply unit
122: heater 123: heater line feeder
124: heater line 125: ejection hole
130: air compressor

Claims (16)

And a heater supply unit for hardening the reinforcing fiber YTe for repair and reinforcement using a heater line, wherein the repairing apparatus includes a maintenance unit for repairing the obsolete pipe line, As a method,
Examining the internal state of the channel;
Removing scale and foreign matter on the inner surface of the channel;
Winding the safety band, the reinforcing fiber YouTube for repair and reinforcement, and the heater line in the inverter;
Inserting the reinforcing fiber YouTube for repair and reinforcement into the pipeline;
The heater supply unit curing the reinforcing fiber YouTube for repair and reinforcement inserted in the pipeline; And
And cutting and finishing both ends of the reinforcement fiber YouTube for repair and reinforcement when the hardening of the reinforcement fiber YouTube for repair and reinforcement is completed,
The heater supply unit may include a heater for generating heat and a heater disposed separately from the inverter at a position adjacent to the inverter for winding the reinforcing fiber for maintenance and repair reinforcement so that the heater line is wound and connected to the heater, Wherein the heater line is disposed in the interior of the pipe for maintenance and reinforcement after the reinforcing fiber for the maintenance and reinforcement reinforcement is inserted in the pipe in the inside of the pipe, To the reinforcement-reinforcement-purpose YouTube for repair and reinforcement,
And the other end of the heater line is connected to the seat belt, and the other end of the heater line is connected to the seat belt,
When the heater line feeder is reversely rotated in a direction in which the heater line is unwound and the reverser is rotated in the reverse direction to the heater line feeder, the heater for reinforcement for reinforcement and the heater line are wound on the reverser ,
When the inverter is reversely rotated, the maintenance-reinforcement-use YouTube and the heater line are released from being wound, and the maintenance-reinforcement-use YouTube for repair and reinforcement is reversely inserted into the pipe, and the heater line is again inserted into the heater line feeder , ≪ / RTI >
When the reinforcing fiber for the repair and reinforcement is inserted into the duct for a predetermined length, the winding of the wire is released from the reinforcement and the heater line wound on the heater line feeder is inserted into the reinforcing fiber for the repair Repairing method using repair tube for maintenance.
The method according to claim 1,
The reinforcement yarn is formed by forming a nonwoven fabric on both sides of the fabric by performing a needle punching operation using a general fiber and a reinforcing fiber in a fabric made of carbon fiber, glass fiber, reinforced polyethylene fiber, reinforced polyester fiber or aramid fiber , A film is coated on one side of the nonwoven fabric on both sides of the fabric, and a nonwoven fabric on the other side of the fabric is impregnated with a thermosetting resin, wherein the common fiber is any one of polyester fiber, polyetherene fiber, and polyethylene terephthalate fiber Wherein the reinforcing fiber is one of carbon fiber, glass fiber, reinforced polyethylene fiber, reinforced polyester fiber and aramid fiber. Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
The method according to claim 1,
Before the winding step,
Further comprising the step of fastening the safety band, the reinforcing fiber for YouTube for maintenance and repair, and the heater line to the inverting unit.
The method of claim 3,
Before the step of hardening the reinforcing fiber for repair reinforcing fiber,
Further comprising the step of inserting the heater line into the interior of the reinforcing fiber for the repair reinforcing fiber.
5. The method of claim 4,
In the step of inverting and inserting the reinforcing fiber for repair and strengthening,
And the high pressure air is received from the air compressor of the repair device by the wastewater pipe.
A maintenance apparatus for repairing an aged pipeline,
Reinforcement tube is wound around the tube, and the maintenance and reinforcement tube is invertedly inserted into the tube;
A heater supply unit for supplying heated air to the inside of the repair and reinforcement tube after the repair and reinforcement tube is reversely inserted in the pipe to harden the repair and maintenance tube; And
And an air compressor for injecting high-pressure air into at least one of the inverter and the heater supply unit,
The heater supply unit includes a heater for generating heat and a heater disposed separately from the inverter at a position adjacent to the inverter for winding the repair and strengthening tube and wound around the heater line and connected to the heater, Wherein the heater line is disposed inside the repair and reinforcement tube after the repair and reinforcement tube is reversely inserted into the pipe, so that the heated air, which is delivered through the heater line feeder, Sprayed toward the tube,
And the other end of the heater line is connected to the safety belt, and the other end of the heater line is connected to the safety belt,
When the heater line feeder is reversely rotated in a direction in which the heater line is disengaged and the inverter is forwardly rotated in a winding direction opposite to the heater line feeder, the maintenance reinforcement tube and the heater line are wound together on the reverser,
When the reversing device is reversely rotated, the maintenance-reinforcing tube and the heater line are released from being wound, and the maintenance-reinforcing tube from which the winding is released is reversely inserted into the pipe and the heater line is again wound around the heater line feeder However,
Wherein when the repair and reinforcement tube is inserted into the pipe for a predetermined length, the winding of the wire is released from the reinforcement and the heater line wound on the heater line feeder is inserted into the repair and reinforcement tube Maintenance equipment for repairing by using tube for repair and reinforcement.
delete delete delete delete The method according to claim 6,
Wherein the heater line is formed with a plurality of ejection holes for ejecting the heated air transferred through the heater line feeder.
12. The method of claim 11,
Wherein the repair and reinforcement tube is injected into the repair and reinforcement tube from the air compressor when the repair and reinforcement tube is cured inside the pipe by the heated air ejected from the heater line. Repairing equipment by wreck.
The method according to claim 6,
Wherein the air compressor injects high-pressure air into the inverter when the repair and reinforcement tube is reversed, and injects high-pressure air into the heater supply section when the repair and strengthening tube is cured. Repair equipment by using wastewater.
The method according to claim 6,
The heater line feeder may have a hollow tube shape,
Wherein the heated air supplied from the heater flows into the heater line feeder provided in the hollow tube shape and the heater line feeder provided in the hollow tube shape communicates with the heater line. Repairing equipment by using wastewater.
The method according to claim 6,
And a boiler used in parallel with the heater supply unit as means for supplying heat for curing the repair and strengthening tube, thereby shortening the working time or rapidly raising the temperature of the repair and maintenance tube Repairing system using a tube for reinforcement.
A repair method using a repair apparatus according to claim 6,
Inserting the repair and reinforcement tube in the pipeline in an inverting manner of the repairing apparatus; And
And a heater supplying portion of the repairing apparatus includes a step of curing the repairing and reinforcing tube inserted in the pipe.
KR1020160014292A 2016-02-04 2016-02-04 Repair reinforcement apparatus for superannuated pipe and repair reinforcement thereof KR101703192B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200011234A (en) * 2018-07-24 2020-02-03 홍익산업개발 주식회사 Non-digging Sewerage Mending Apparatus and its manufacturing method
CN113915448A (en) * 2020-07-08 2022-01-11 五行科技股份有限公司 Method for repairing connecting joint of conveying pipe and method for repairing conveying pipe
KR102634437B1 (en) * 2023-01-05 2024-02-06 (유)탑환경건설 Non-drilling water supply and sewerage overall repair device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0671753A (en) * 1992-08-25 1994-03-15 Takiron Co Ltd Method for reforming branch pipe
JPH09123279A (en) * 1995-10-31 1997-05-13 Yoshika Kk Method and device for repairing existing pipeline and lining material for repairing existing pipeline
KR20110128028A (en) * 2010-05-20 2011-11-28 주식회사 인프라서브 Inversion apparatus for lining material and inversion method using the same
KR101339748B1 (en) * 2013-07-18 2013-12-10 주식회사 지성이엔지 Reinforcing-repairing tube of water and sewage conduit using fiber-reinforced composite and manufacturing method of the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0671753A (en) * 1992-08-25 1994-03-15 Takiron Co Ltd Method for reforming branch pipe
JPH09123279A (en) * 1995-10-31 1997-05-13 Yoshika Kk Method and device for repairing existing pipeline and lining material for repairing existing pipeline
KR20110128028A (en) * 2010-05-20 2011-11-28 주식회사 인프라서브 Inversion apparatus for lining material and inversion method using the same
KR101339748B1 (en) * 2013-07-18 2013-12-10 주식회사 지성이엔지 Reinforcing-repairing tube of water and sewage conduit using fiber-reinforced composite and manufacturing method of the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200011234A (en) * 2018-07-24 2020-02-03 홍익산업개발 주식회사 Non-digging Sewerage Mending Apparatus and its manufacturing method
KR102165785B1 (en) * 2018-07-24 2020-10-14 홍익산업개발 주식회사 Non-digging Sewerage Mending Apparatus and its manufacturing method
CN113915448A (en) * 2020-07-08 2022-01-11 五行科技股份有限公司 Method for repairing connecting joint of conveying pipe and method for repairing conveying pipe
KR102634437B1 (en) * 2023-01-05 2024-02-06 (유)탑환경건설 Non-drilling water supply and sewerage overall repair device

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