JP3202773B2 - Pipeline repair equipment and pipeline repair method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipeline repair device for repairing, for example, a pipeline buried underground from inside a pipeline, and a pipeline repair method using the device. is there.

[0002]

2. Description of the Related Art As a technique for repairing a damaged portion of a conduit buried underground from the inner surface side of the conduit, an outer shape is substantially cylindrical, and the surface is made expandable and contractable with a flexible material. There is one that uses a formed pipeline repair device (hereinafter referred to as a packer) (for example, see Japanese Patent Application Laid-Open No. 2-80891).

In such a pipe repair method using a packer, a sheet material impregnated with an uncured synthetic resin is mounted on the outer peripheral surface of the packer, and the packer is disposed at a required position in a pipe to be repaired. By inflating the packer by air pressure or the like, the sheet material is pressed against the inner wall of the pipeline, the synthetic resin is cured, and the damaged portion is repaired.

[0004]

By the way, a connecting portion of a pipe (hereinafter referred to as a main pipe) having an open branch pipe is formed by penetrating one of the pipe bodies originally formed separately into the other pipe by using a mortar or the like. Is often formed integrally by bonding at the site, and is a part that is easily damaged by peeling of the mortar and the like, and according to the conventional repair method as described above, the main pipe needs to be repaired at a required part. If the branch pipe is open, a repair material is also formed at the opening of the branch pipe to the main pipe.Therefore, use a cutter or the like to pierce the pipe to ensure communication between the main pipe and the branch pipe. And the repair work is complicated.

According to the conventional repair method, after a repair material is formed along the inner wall surface of the main pipe, the repair material is formed at the opening of the branch pipe in order to establish communication between the main pipe and the branch pipe as described above. Since the repair material is pierced accordingly, the connection between the branch pipe and the main pipe is located near the edge of the drilled repair material, so it is difficult to ensure complete waterproofness, and damage at this connection Cannot be completely repaired.

The present invention has been made on the basis of such a background. In this kind of pipeline repair work, it is relatively easy and reliable to repair the connection between the main pipe and the branch pipe. Pipeline repair device and its device for the purpose
And a pipe repair method using the same .

[0007]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a main body having a substantially cylindrical outer shape disposed on a branch pipe of a pipeline. A pipe formed of a flexible material at an outer peripheral portion of the main body portion, an empty space formed inside the outer peripheral portion, and a fluid pressure introduced into the empty chamber to expand and contract the outer peripheral portion. In the repair device, a flange portion is formed at one end of the main body portion , and this is attached to the flange portion.
Pressurizing press for pressing against the inner wall surface of the main pipe of the pipe
It is characterized by providing a rate .

[0008]

According to the first aspect of the present invention, a flange portion is formed at one end of the main body portion of the pipeline repair device, and the flange portion is formed on the flange portion.
This (the flange itself) is attached to the inner wall surface of the main pipe of the pipeline.
Since a pressure plate for pressing is provided, when the main body of the pipeline repair device is inserted from the main pipe side toward the inside of the branch pipe, the flange portion becomes near the opening of the branch pipe. Is pressed by the pressure plate against the inner wall surface.

For this reason, by attaching a repair material impregnated with uncured synthetic resin to the flange portion, the repair material covers the opening edge of the branch pipe and the inner wall surface of the main pipe in the vicinity thereof. Thus, the connection between the main pipe and the branch pipe can be reliably repaired.

In the repair work using this pipeline repair device, the repair work is performed relatively easily because the repair material does not block the opening of the branch pipe and there is no particularly complicated work process. In addition, it can be used in combination with the conventional repair method described above.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

First, a packer as a pipeline repair device will be described with reference to FIG. 1 and FIGS. 3 to 5, and thereafter, a method of using the packer will be described with reference to FIG.

[0013] As shown in FIG. 1, a repaired target conduit is provided with a main pipe 2 and the branch pipe 3. This main pipe 2 and the branch pipe
The connection portion 4 with the pipe 3 is formed by inserting the end 3a of the branch pipe 3 into a through hole 2a formed in the main pipe 2 and bonding it at a construction site using a mortar 5.

The packer 11 has a main body 12 having a substantially cylindrical outer shape, and is formed integrally with one end (the lower end in the figure) of the main body 12 and projects outward from the main body 12.
And a flange portion 13.

The flange portion 13 is curved along one axial direction and is formed substantially along the inner wall surface 2b of the main pipe 2.

The flange portion 13 has a rigid pressure plate 14 made of an aluminum alloy, and the main body portion 12 is formed on the pressure plate 14.

The main body part 15 forming the main body part 12 is an integrally molded product made of a flexible material such as rubber or polyurethane and has a generally cylindrical shape having a bottom and an outward flange 15a at an opening edge thereof. Are integrally formed (see FIG. 1).

The outward flange 15 of the main body part 15
The a, the flange portion 13 by vulcanization bonded over the entire circumference to the edge of the pressure plate 14 is formed, also gas-tight to the inside of the body part 15 and the pressing plate 14 of its Check 16 Are formed.

The upper end of the body part 15 also has
A rigid end plate 17 made of aluminum alloy is similarly vulcanized.

A space 16 is provided between the pressure chamber 14 and the pressure plate 14.
When forming the main body part 15, the bottom part (upper part in the figure)
The end plate 17 may be adhered to this and then closed.

The end plate 17 is provided with a work chain 18 which corresponds to the cord body in the present invention and extends to the tip 3b side of the branch pipe 3 (the side opposite to the main pipe 2 ; see FIG. 2 ) . The pressure plate 14 and the end plate 17 are connected to each other by a chain 19 having a predetermined length in the empty chamber 16. This chain 19 corresponds to the extension stopping means in the present invention.

The pressure plate 14 of the packer 11
Has a communication port 21 communicating with the vacant chamber 16,
Compressed air supply / discharge hose 2 extending from an air compressor (not shown)
2 are connected.

The supply / discharge hose 22 corresponds to a fluid pressure introduction pipe according to the present invention. The reason why the supply / discharge hose 22 is guided from the pressure plate 14 side to the empty chamber 16 will be described later. This supply and discharge hose 2
2 is not required to be inserted into the small-diameter branch pipe 3.

By appropriately adjusting the pressure of the compressed air supplied to the vacant chamber 16 through the supply / discharge hose 22, the chain 1
9 acts so that the outer shape of the body part 15 can expand and contract mainly in the radial direction.

Prior to performing the pipe line repair work using such a packer 11, a repair material 23 impregnated with an uncured synthetic resin is mounted on the surface of the packer 11.

As the repair material 23 in this embodiment, an uncured epoxy resin impregnated with felt and glass fiber mat is used.
A vinyl sheet is wound and mounted on the outer periphery of the main body component 15 of the packer 11 in advance in consideration of the ease of peeling from the packer 1.

As shown by phantom lines in FIG. 3, these repair materials 23 extend from the outer peripheral surface below the position immediately below the upper end of the main body 12 of the packer 11 to a position near the edge of the upper surface of the flange 13. Is attached integrally from the outside of the vinyl sheet so as to cover the entirety of the vinyl sheet.

In the case of this embodiment, the mat of the repairing material 23 is formed of the packer 11 which is formed in advance to a predetermined size and shape at the time of expansion by the supply of compressed air to the vacant space 16. As shown in FIG. 4, there is some slack 24, but there is no problem.

Also, the mat of the repair material 23 is not used as described above in a predetermined size and shape.
It is good also as winding and using a sheet-shaped thing as shown in FIG. In this case, the size of the overlap 25 can be reduced by shifting the edge of the repairing material 23 as the main body 12 expands, so that the slack 24 is unnecessary.

The packer 11 having the repair material 23 mounted thereon
The repair work of the connecting portion 4 between the main pipe 2 and the branch pipe 3 is performed as follows (see each drawing in FIG. 2).

In the drawing, reference numeral 31 denotes a first manhole provided in the main pipe 2, 32 denotes a second manhole adjacent to the first manhole 31, and 33 denotes a bogie having a positioning rope 34. .

First, a rope is inserted between the first manhole 31 and the second manhole 32 so that the bogie 33 can be positioned by the positioning rope 34, and the first manhole 31 and the second The work rope is inserted into the first manhole 31 from the opening at the tip 3b side of the branch pipe 3 located between the first manhole 31 and the packer 1.
1 and the packer 11 is mounted on the carriage 33 in a state of being placed horizontally in the axial direction of the main pipe 2 (FIG. 2).
(A)).

Thereafter, the carriage 33 is moved by attracting the positioning rope 34 from the first and second manholes 31 and 32, and a positioning operation is performed to position the carriage 33 immediately below the required branch pipe 3 ( (See FIG. 2B).

At the time of this positioning operation, it is preferable that the operation chain 18 be appropriately wound so as not to cause excessive slack in order to smoothly perform the operation.

After the carriage 33 is positioned at an appropriate position with respect to the branch pipe 3 in this manner, the working chain 18 is pulled on the tip 3b side of the branch pipe 3, whereby the working chain 1 is moved.
The tip portion (main body portion 12) of the packer 11 connected to the pipe 8 enters the branch pipe 3, and at the same time, the flange portion 13 of the packer 11 is pressed against the inner wall surface 2b of the main pipe 2 (FIG. 2 (c)). reference).

In this embodiment, the lifting pressure of the packer 11 by the working chain 18 may be, for example, about 1 kg / cm ² .

At the time of this lifting, the working chain 18 is connected to the end plate 17 of the packer 11, and since the end plate 17 is vulcanized and bonded to the upper end of the main body component 15, the work chain 18 is locally excessively attached to the main body component 15. It prevents the excessive lifting force from acting in a concentrated manner. Further, since the end plate 17 and the pressure plate 14 are connected by the chain 19, even if an excessive lifting force acts on the packer 11 from the working chain 18, the main body 15 made of a flexible material has a large size. Prevents the lifting force from acting,
5 is prevented from being excessively stretched to prevent the packer 11 from being damaged.

Further, since the end plate 17 is located on the tip side of the packer 11 when the packer 11 is lifted up, the end plate 17 may be caught by an opening edge or a projection when the packer 11 enters the branch pipe 3. Further, it is possible to prevent the main body component 15 formed of a flexible material from being damaged by projections or the like.

As described above, the main body 12 of the packer 11 is inserted into the branch pipe 3, and at the same time, the flange 1
After the tube 3 is pressed against the inner wall surface 2 b of the main pipe 2, compressed air is supplied to the empty space 16 of the packer 11 through the supply / discharge hose 22.

The air pressure of the compressed air in this embodiment is, for example, about 1.6 kg / cm ² , and the packer 11 may retreat toward the main pipe 2 with the expansion of the packer 11 due to the supply of the compressed air. The lifting pressure by the working chain 18 is also the same pressure of about 1.6 kg / cm ² .

The supply of the compressed air causes the packer 11 to expand mainly in the radial direction in combination with the effect of the chain 19, and the repair material 23 attached to the outer surface of the main body 12 of the packer 11.
Is pressed against the inner wall surface of the branch pipe 3 by the pressure of the compressed air. Further, the repair material 23 mounted on the upper surface of the flange portion 13 of the packer 11 is pressed against the inner wall surface 2b of the main pipe 2 by the pressing plate 14 by the lifting force from the working chain 18 (see FIG. 1). ). In FIG. 1, the imaginary line indicates the outer shape of the main body 12 in a contracted state before expansion.

In this repair method , the main chain 2 of the packer 11 is inserted into the branch pipe 3 by using the working chain 18 and the pressure plate 14 as described above.
The pressing of the repair material 23 to the inner wall surface 2b can be easily performed as a series of operations, and there is an advantage that the number of operation steps is small.

In particular, after the flange 13 of the packer 11 presses and fixes the lower edge of the repair material 23 on the inner wall surface 2b of the main pipe 2, the outer peripheral portion of the main body 12 is expanded.
The repair material 23 is not easily displaced, and the inner wall surface 2
The continuous repair from b to the inner wall surface of the branch pipe 3 can be reliably performed.

After the repair material 23 has hardened while maintaining the above state, the compressed air in the empty space 16 of the packer 11 is discharged, the internal pressure is reduced, and the main body 12 of the packer 11 is reduced in diameter. Is repair material 23 with vinyl sheet
And falls onto the carriage 33.

The cart 33 on which the packer 11 is mounted is
By pulling the positioning rope 34, it can be collected, for example, in the first manhole 31, and the repair work ends.

FIGS. 6 and 7 show a second embodiment of the packer which can be used for the repair work of the connecting portion 4 between the branch pipe 3 and the main pipe 2 performed in this manner.

The second embodiment will be described below. The second embodiment differs from the first embodiment only in the structure thereof, and is used in exactly the same manner.

Therefore, only the differences from the first embodiment will be described below, and the same points will be denoted by the same reference numerals in the drawings, and description thereof will be omitted.

That is, the packer 41 of the second embodiment
, It has a first embodiment similarly to the main body portion 12 and the flange portion 13, is between the pressure plate 14 and the end plate 17 for welding the cylindrical member 42 made of an aluminum alloy
Are more connected (coupled) to.

In this embodiment, the chain 19 of the first embodiment is used.
The reason why the cylindrical body 42 is used in place of the above is to enable the flow of drainage through the branch pipe 3 inside the cylindrical body 42 during the repair work, and this cylindrical body 42 is the same as that of the first embodiment. It also has the same function as chain 19.

On the outer peripheral side of the cylindrical body 42, a main body part 43 made of a flexible material and formed in an annular shape is provided.

As shown in FIGS. 6 and 7, an annular empty space 44 is formed inside the main body component 43.
The supply / discharge hose 22 is connected to the empty chamber 44 through the communication port 21 so that compressed air is supplied.

Therefore, also in the packer 41, the outer peripheral surface of the main body 12 can be expanded and contracted by the compressed air from the supply / discharge hose 22.

The work chain 18 is attached to the end plate 17.
Is provided, so that it can be used similarly to the first embodiment.

Therefore, the packer 41 of the second embodiment is used.
In this embodiment, the repair material 23 is integrally attached to the outer peripheral surface of the main body 12 and the upper surface of the flange portion 13 as in the first embodiment, so that these repair materials 23 are attached to the inner wall surface of the branch pipe 3 and the inside of the main pipe 2. It can be installed on the wall surface 2b.

Next, the packer 51 of the third embodiment will be described with reference to FIG. 8. The packer 51 of the third embodiment differs from the first and second embodiments described above in that the axis of the main body 12 has a flange portion. 13 is different only in that it is installed at an inclination (inclination angle θ), and the other points are the same.

The reason why the axis of the main body 12 is inclined with respect to the flange 13 in this manner is that, as is apparent from FIG. The connection part 4 may be formed in an orthogonal state. In this case, in order to equalize the pressing force of the repair material 23 to the inner wall surface 2b of the main pipe 2 by the flange part 13, and to increase the reliability of the repair work. It is.

In each of the embodiments described above,
Although an example using air pressure as the fluid pressure has been described, the present invention is not limited to this, and the present invention can be implemented using hydraulic pressure, hydraulic pressure, or the like. Further, in each embodiment, the insertion of the packer 11 into the branch pipe 3 is performed by a cord such as the chain 19. However, mechanical means such as an industrial robot is disposed inside the main pipe 2. Thereby, the packer 11 can be inserted into and removed from the branch pipe 3.

[0059]

As described above, according to the first aspect of the present invention, a flange is formed at one end of the main body of the pipeline repair device, and the flange is formed in the main pipe of the pipeline. Wall
Since is provided a pressure plate for pressing against the main pipe side toward the body portion of the conduit repair apparatus inside the branch pipe
The flange is pressed by the pressure plate against the inner wall surface of the main pipe near the opening of the branch pipe.

Therefore, by mounting a repair material impregnated with uncured synthetic resin on the flange portion, the repair material covers the opening edge of the branch pipe and the inner wall surface of the main pipe in the vicinity thereof. Thus, the connection between the main pipe and the branch pipe can be reliably repaired.

In the repair work using the pipeline repair device, the repair work is performed relatively easily because the repair material does not block the opening of the branch pipe and there is no particularly complicated work process. In addition, it can be used in combination with the conventional repair method described above.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a packer according to a first embodiment in a repair operation (expanded state).

FIGS. 2 (a) to 2 (c) are process explanatory diagrams of a repair work.

FIG. 3 is a perspective view of the packer of the first embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an explanatory view of a mounted state of another repair material in a cross section corresponding to FIG. 4;

FIG. 6 is a longitudinal sectional view of a packer according to a second embodiment.

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is an explanatory diagram of a packer according to a third embodiment.

[Explanation of symbols]

 2 Main pipe 2b Inner wall surface 3 Branch pipe 3b Tip 11, 41, 51 Packer (pipe repair device) 12 Main body 13 Flange 14 Pressure plate 15, 43 Main component 16, 44 Vacancy 17 End plate 18 Working chain (Cables) 19 Chain (stopping means) 22 Supply / discharge hose (introduction line for fluid pressure) 23 Repair material 42 Tubular body (stopping means)

Claims (7)

(57) [Claims] An outer shape of a body disposed in a branch pipe of a conduit has a substantially cylindrical shape, and an outer peripheral portion of the main body portion is formed of a flexible material. forming a, in expansion and contraction can and the conduit repair apparatus of the outer peripheral portion by introducing a fluid pressure into the air chamber, a flange portion formed at one end of the body portion, the flange
This is pressed against the inner wall surface of the main pipe of the conduit.
Pipeline repairing device provided with a pressurizing plate . 2. The pipeline repair device according to claim 1,
A conduit repair device, wherein a conduit for introducing fluid pressure into the vacant chamber is communicated from the flange portion side to the vacant chamber. 3. The pipeline repair device according to claim 1,
A pipe repair device comprising a cord body at the other end of the main body . 4. The pipeline repair device according to claim 3,
Install an end plate at the other end of the main body, and
A pipe repair device characterized in that the cable member is connected to a plate . 5. A pipe repair device according to claim 1, 2 or 3.
End plate at the other end of the main body
And extend between the end plate and the pressure plate.
A pipe repairing device characterized by being connected by a locking means . 6. The method according to claim 1, wherein
The surface of the main body and flange of the
The repair material impregnated with the cured synthetic resin is installed, and
Insert the main body of the repair device into the branch pipe from the main pipe side of the pipe
At the flange part, between the edge of the repair material and the inner wall surface of the main pipe
To fix it, and then introduce fluid pressure into the vacant chamber.
To expand the outer peripheral portion of the main body portion and apply the repair material to the branch pipe.
Pipeline repair work characterized by pressing between inner wall surfaces
Law . 7. The main body of the pipeline repair device according to claim 3.
And the surface of the flange is impregnated with uncured synthetic resin.
Attach the training material and insert it into the branch pipe from the main pipe side of the pipeline.
Before installing the cord of the pipeline repair device into the branch pipe
By inserting the cord from the tip of the branch pipe.
To allow the main body of the pipeline repair device to enter the branch pipe.
And the flange of the pipe repair device is attached to the inner wall of the main pipe.
Pipeline repair method characterized by pressing against a surface .