KR101012682B1 - Pipe repairing device and method of repairing pipe with use thereof - Google Patents

Abstract

The present invention relates to a repairing apparatus for repairing cracks, etc. formed in the inner wall of a pipeline buried underground by filling a thermosetting resin-based repair agent, and a repairing method thereof, and in particular, the repairing apparatus for the pipeline includes ground compressed air supply means (C). And a packer member 10 which is expanded with compressed air supplied from the packer member 10, which is made of a endothelium 11 and an outer shell 12 made of a rubber material to be folded and stretchable, and compressed. The inner surface of the envelope and the endothelium is spaced at regular intervals so as to restrict the endothelium 11 from overexpanding radially inward when the envelope 12 and the endothelium 11 expand radially outward by air. Insulating material layer laminated between the outer surface and the repair agent of the connecting member 13 and alternating connection and the heat of the heat generated when the repair agent 16 is cured to the shell 12 to prevent the transfer to the shell 12 14, Group is the insulation layer 14 from the repair filler 16 is easily separated so that further contains a release agent layer 15 is laminated between the heat insulating material layer 14 and the repair filler 16 is configured.

Pipeline repair, packer, connecting member, repair agent,

Description

PIPE REPAIRING DEVICE AND METHOD OF REPAIRING PIPE WITH USE THEREOF}

The present invention relates to an apparatus for repairing pipelines such as a water pipe or sewage pipe embedded in the ground, and a pipeline repair method using the repair apparatus. In particular, the present invention does not directly enter the inside of the pipeline embedded in the ground, the so-called non-excavated pipeline repair device for repairing the pipeline by injecting or applying a repair agent containing a thermosetting resin to the cracks or damages generated on the inner wall of the pipeline And it relates to a pipeline repair method using the repair device.

Water pipes, sewage pipes, gas pipes, etc. (hereinafter, simply referred to as "pipes") buried underground cause vibrations by vehicles traveling on roads to crack or damage inner walls as time passes.

If leakage occurs due to cracks or breakage of the pipeline, it not only adds soil pollution but also contaminates underground water quality, and foreign materials such as soil and sand are introduced into the broken and cracked portions of the pipeline to contaminate the contents. .

Increasingly, the use of repairing devices for filling and repairing resin-based repair agents on the inner walls of cracked or broken pipes is increasing. Such a conventional repair device is known as Korean Patent No. 588821.

Since the conventional repairing device is provided with an expandable packer on the outer circumference of the cylindrical frame, when the diameter of the frame is larger than the diameter of the manhole, which is the entrance to the pipeline, the packer cannot be passed into the manhole, which is larger than the diameter of the manhole. There is a problem that cannot be used to repair the so-called 'large diameter pipeline' of diameter. That is, the conventional repairing device has a disadvantage that the use is limited depending on the size of the frame supporting the packer.

The conventional repairing device is made of a rubber material so that the packer expands with the injected air, and a repairing agent is applied to the outer circumferential surface of the packer. The packer's repair agent is generally made of a mixture of epoxy resin and powdered glass fiber. As compressed air is injected into the packer and the packer expands, the repair agent provided on the outer circumferential surface closely adheres to the inner wall of the conduit, thereby repairing the contaminated portion or crack of the inner wall of the conduit. However, the packer is deteriorated by heat generated during the curing of the epoxy-based resin contained in the repair agent, which has a problem of shortening the life.

In other words, the heat generated from the repair agent provided on the outer circumferential surface of the packer was transferred to the packer on the bottom to deteriorate the packer.

Therefore, the present invention was invented to solve the disadvantages of the conventional pipeline repair device, and it is possible to improve the safety and convenience of the worker by allowing the worker to repair cracks generated on the inner wall of the pipeline without entering the pipeline. An object of the present invention is to provide a pipeline repair system and a repair method thereof.

In addition, the present invention is a repair device capable of repairing a relatively large diameter pipeline by allowing the facility to enter into the pipeline even when the size of the manhole communicated with the pipeline is smaller than the diameter of the pipeline so that the maintenance equipment or operators can enter into the pipeline. There is another purpose to providing a.

In addition, the present invention packers that pressurize the repair agent to the inner wall of the pipeline with a uniform force by maintaining the uniform expandability of the packer is not partially deteriorated by heat generated during the curing process of the repair agent provided on the packer surface of the repair device It is another object to provide a repair device having a.

Repair device of the present invention for achieving the above object,

Compressed air supply means,

The compressed air supply means includes an annular tube-shaped packer member that expands radially outward by compressed air supplied through the air inlet into the air injection space therein so that the outer surface pressurizes the inner surface of the repair conduit. and,

The packer member,

A cylindrical endothelial made of a rubber material to be folded, A cylindrical made of a rubber material to form an air injection space along the outer periphery of the endothelial at the outside of the endothelial and a rubber material to be folded, and injected into the air injection space When the outer shell and the inner shell expands radially outward by compressed air, a connection member for connecting the outer shell and the inner shell to maintain the gap between the outer shell and the inner shell, and block the high temperature heat transmitted to the outer shell of the rubber material. In order to prevent the shell from deteriorating, the insulating material layer laminated on the outer surface of the outer shell, the release agent layer laminated on the outer surface of the heat insulating material layer, and the outer surface of the release material with a repair agent laminated in the circumferential direction do.

In addition, the pipeline repair method using the repair device of the present invention, the packer member folding the packer member to be introduced into the manhole which is in communication with the pipeline to be repaired; Connecting an air inlet pipe to the air inlet of the packer member and passing the manhole in a folded state to put it into a pipe to be repaired; Disposing the packer member at a position to be repaired in the conduit; Supplying compressed air into the inner air injection space of the packer member to expand the packer member; Compressing and filling the cracks of the conduit with the repair agent provided on the outer surface of the packer member by the expansion force of the packer member; And curing the repair agent filled in the cracked portion in a pressurized state with a packer member. And shrinking the packer member by discharging air from the packer member after curing of the repair agent. Removing the contracted packer member through the manhole.

As described above, since the packer member is made of soft rubber and can be folded to reduce the volume, the repairing apparatus of the present invention can pass a manhole having a diameter smaller than that of the pipe to be repaired. Therefore, the repairing apparatus of the present invention can be applied even when the diameter (diameter) of the manhole which is the large diameter, that is, the entrance entrance of the pipe, is small, so that the subject range of the repair work can be expanded.

In particular, since only the packer member is folded into the pipeline and no other support body is used to support the packer member, the operator does not need to enter the pipeline for maintenance work, so that the worker is suffocated by harmful gas while working inside the pipeline. It is effective to prevent safety accidents.

In addition, the repair device of the present invention has the effect that the outer shell of the packer member is connected to the endothelial as a connecting member to maintain the gap between the inner and outer shell when the packer member is expanded.

In addition, according to the repairing apparatus of the present invention, heat generated when the repairing agent is cured is not blocked by the heat insulating material layer and is not transmitted to the outer shell made of rubber material, thereby preventing the deterioration of the outer shell and thus extending the performance and life of the packer member. There is an advantage.

Hereinafter, a preferred embodiment of a pipeline repair device and a pipeline repair method using the repair device according to the present invention will be described in detail according to the accompanying drawings.

As shown in Figure 1, the pipeline repair apparatus of the present invention is installed on the ground through compressed air supply means (C) for generating and supplying compressed air, and through the supply pipe (L) in the compressed air supply means (C) It expands radially outward by the compressed air supplied into the inner air injection space (S), the outer surface is made of an annular tube-shaped packer member 10 to press the inner surface of the maintenance conduit (P).

As shown in FIG. 3, the packer member 10 includes an inner shell 11 and an outer shell forming an air injection space S along an outer circumference of the inner shell 11 at an outer side of the inner shell 11. 12, the connecting member 13 connecting the outer shell 12 and the inner shell 11 to each other in the air injection space S, and the heat insulating layer 14 laminated on the outer surface of the outer shell 12. And a release agent layer 15 laminated on the outer surface of the heat insulating material layer 14, and a repair agent 16 laminated along the circumferential direction on the outer surface of the release agent layer 15.

The inner shell 11 and the outer shell 12 are preferably made of a collapsible and stretchable rubber material. Endothelial 11 is made of a cylindrical shape, the outer shell 12 is made of a cylindrical shape to surround the outside of the endothelial (11), the end of the longitudinal end of the endothelial 11 and the outer shell 12 are bonded to each other and the air therebetween The injection space S is formed. The packer member 10 maintains its folded state as shown in FIG. 4 before expansion, and expands by injecting compressed air into the air injection space S and expands the hollow tube shape as shown in FIG. 2. Is achieved.

As shown in FIG. 2, the connecting member 13 is alternately fixed to the inner surface of the endothelium and the inner surface of the outer shell at regular intervals along the circumference of the endothelium and the outer shell, and is installed in a zigzag shape as a whole. The connecting member 13 maintains the distance between the outer shell 12 and the inner shell 11 at a constant distance so that when the packer member 10 expands in contact with the inner surface of the water conduit P, the endothelial 11 is expanded. This prevents excessive expansion in the center direction.

On the other hand, when the packer member 10 expands, by increasing the degree of expansion of the outer shell 12 side and limiting the degree of expansion of the inner shell, as a method of increasing the pressing force of the repair agent by the expansion of the outer shell side, the endothelial 11 is It is formed of a rubber material having a larger elastic modulus than the outer shell 12 so that the expansion ratio is less than that of the outer shell 12 at the same internal pressure, or the inner shell 11 is made of a rubber material having a relatively thicker thickness than the outer shell 12. It can be formed so that the expansion rate is less than the outer shell 12 at the same internal pressure.

The expansion force of the packer member 10 is transmitted to the inner wall of the conduit P to press the repairing agent 16 provided on the outer side of the packer member 10 toward the inner wall of the repair conduit P. Accordingly, the equipment is simplified because there is no need for a means such as a metal frame for endothelial support, which is conventionally provided in order to transmit the expansion force of the packer member to the inner wall of the pipe.

The connecting member 13 may be made of any material as long as it is a flexible string or a sheet.

On the other hand, the outer surface of the outer shell 12 is laminated with a heat insulating material layer 14 laminated to surround the outer shell 12. As described later, the heat insulating material layer 14 deteriorates the outer skin 12 made of rubber material by blocking the transfer of heat generated when the water-retaining agent 16 laminated on the outer surface is hardened to the outer skin 12. It is to prevent it from becoming.

The heat insulating material layer 14 is preferably a sheet formed of polyester, but is not limited thereto.

On the outer side surface of the heat insulating material layer 14, a repair agent 16 to be filled in a crack or a groove formed in the repair conduit P is provided with a predetermined thickness. The water retaining agent 16 is laminated on the outer surface of the heat insulating material layer 14 in a constant width along the periphery of the outer shell 12 of the packer member 10 that expands when the packer member 10 expands inside the pipeline P. By pressurizing the inner surface of the pipe line (P) by the close contact with the cracks and grooves formed in the inner wall of the pipe line (P), and after the filling is hardened to repair the cracks or grooves (damage part).

The water retaining agent 16 is usually made of any one thermosetting resin selected from phenol resin, urea resin, melamine resin, epoxy resin, and polyester resin. When the repair agent 16 is filled and cured in the repair portion of the repair conduit P, high temperature heat is generated, and this heat is blocked in the heat insulation layer 14 and is not transmitted to the shell 12.

Meanwhile, a release agent layer 15 may be provided between the repair agent 16 and the heat insulating material layer 14. The release agent layer 15 serves to facilitate separation from the heat insulation layer 14 when the repair agent 16 is in close contact with the inner wall of the conduit P by the expander packer member 10.

Hereinafter, a method of repairing cracks, scratches, grooves, etc. formed in the inner wall of the pipeline by using the pipeline repair apparatus configured as described above will be described.

First, the inner wall of the pipe (P) to be repaired by spraying high pressure steam or high pressure water to the inner wall of the pipe (P) to be repaired.

Then, before injecting air into the packer member 10 of the repair apparatus according to the present invention, the packer member 10 is folded as shown in FIG. 4. Since the packer member 10 does not pass through the manhole H having a diameter smaller than the diameter of the maintenance conduit P in the expanded state, the packer member 10 is first folded into a small size before feeding. (FIG. 6A)

The air inlet 10a of the folded packer member 10 is connected to the compressed air supply means C (mainly an air compressor is used) provided on the ground and a supply pipe. Then, the packer member 10 connected to the compressed air supply means C is introduced into the pipeline P to be repaired through the manhole H, and moved to the position to be repaired. (FIG. 6B) Movement of the packer member 10 may use a robot.

Then, the compressed air of the compressed air supply means C is injected into the packer member 10 to expand the packer member 10 (FIG. 6C).

As the packer member 10 expands, the repair agent 16 provided in the outermost layer is pressurized by the expansion force acting radially outward of the packer member 10 to form a cracking portion X formed on the inner wall of the repair conduit P. Is charged. As such, the pipe P is repaired by maintaining the expansion of the packer member 10 for a predetermined time until the crack X is cured in the state where the repair agent 16 is filled.

After the repair agent 16 is cured, the packer member 10 is contracted by discharging air from the air injection space of the packer member 10. (FIG. 6E)

The contracted packer member 10 is moved to the next repair work position along the repair pipe P to repeat the same process as before to repair the repaired part of the entire conduit.

After the maintenance work is completed, the air is discharged from the packer member 10 to shrink the packer member 10, and then retracted out of the conduit P and then taken out of the ground through the manhole H to end the repair work.

According to the repairing method using the packer member of the present invention as described above, to pass through the packer member 10 through the manhole (H) of a diameter smaller than the inner diameter of the repair pipe (P) to be introduced into the repair pipe (P). Since it can be, there is an advantage that can perform the pipeline repair work without being limited in the size of the manhole.

And, according to the present invention, there is no need for a metal frame for supporting the packer member 10, there is an advantage that the operation is easy to move the equipment is simple, and quick. In particular, there is an advantage in that the operation is quick and convenient because it does not need to use the inward expansion suppression mechanism of the packer member, such as a metal frame, and can act as the structure of the packer member itself to press the inflating force to press the repair agent to the inner wall of the pipe.

In addition, the operator can be repaired in a non-excavated manner without directly injecting the operator into the repair pipe P, thereby ensuring work safety and work convenience.

1 is a schematic diagram showing a repair operation using a pipeline repair apparatus according to the present invention,

Figure 2 is a perspective view of the expanded state of the packer member of the pipeline repair apparatus according to the present invention,

Figure 3 is a cross-sectional view of the expanded state of the packer member of the pipeline repair apparatus according to the present invention,

Figure 4 is a perspective view of the folded state before the expansion of the packer member of the pipeline repair apparatus according to the present invention,

5 is a state of use of the packer member of the pipeline repair apparatus according to the present invention,

6A to 6E are schematic diagrams illustrating step-by-step methods for repairing a pipeline using a pipeline repair apparatus according to the present invention.

※ Explanation of code about main part of drawing ※

P: Repair pipeline C: Compressed air supply means

H: Manhole X: Crack in Pipeline

L: air supply pipe 10: packer member

10a: air inlet S: air inlet space

11: inner 12: outer

13: connecting member 14: insulation material

15: Release agent layer 16: Repair agent

Claims (4)

Compressed air supply means, Containing the inner shell (11) and the outer shell (12) to form an air injection space (S), the repair agent for repairing the cracks in the repair conduit (P) by filling in the crack formed on the inner wall of the repair conduit (P) (16) ) Is provided on the outer surface of the shell 12 so as to expand radially outward by the compressed air supplied from the compressed air supply means into the air injection space (S) so that the repair agent (16) to the maintenance pipe (P). In the conduit repair device comprising an annular tube-shaped packer member (10) is pressed to fill the crack (X) of the), The packer member 10, The inner shell 11 and the outer shell 12 are made of a rubber material to be folded and stretchable, The gap between the endothelial 11 and the outer shell 12 is maintained when the outer shell 12 and the inner shell 11 expand radially outward by compressed air injected into the air injection space S. High temperature heat generated when the outer member 12 and the connecting member 13 made of a flexible material alternately connect the inner surface of the inner shell 11 at regular intervals, and the repair agent 16 is cured. The insulation 16 is easily separated from the insulation layer 14 and the insulation layer 14 laminated between the outer surface of the shell 12 and the repair agent 16 so as to block delivery to the insulation 12. Pipe repair apparatus characterized in that it further comprises a release agent layer (15) laminated between the heat insulating material layer (14) and the repair agent (16) as possible. The method of claim 1, The inner shell 11 is formed of a rubber material having a larger elastic modulus than the outer shell 12, so that the expansion rate is smaller than the outer shell 12 at the same internal pressure. The method of claim 1, The endothelium 11 is formed of a rubber material having a relatively thicker thickness than the outer shell 12, the pipeline repair apparatus, characterized in that the expansion rate is less than the outer shell 12 at the same internal pressure. delete

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