JP3286035B2 - Pipeline repair method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for repairing a pipeline, in which a repair material impregnated with uncured synthetic resin is pressed and adhered to a pipeline such as a drain pipe from the inner surface side. Things.

[0002]

2. Description of the Related Art In a pipeline repairing method using a pipeline repairing device provided with an expansion chamber capable of expanding radially outward of a pipeline, and the outer periphery of the expansion chamber is formed of a flexible film, the expansion chamber is reduced. Since the repair material having a length substantially equal to the entire circumference of the inner surface of the conduit is attached to the outer periphery of a certain flexible film, the repair material forms an overlapped portion in a locally folded state on the outer periphery of the contracted flexible film. The repair material is disposed along the inner surface of the conduit while the repair material is spread from the overlapping portion as the flexible membrane expands, and is pressed and adhered to the inner surface of the conduit.

[0003] Then, the pipeline repair device in the reduced state, in which the repair material is mounted, is inserted into the pipeline, and thereafter the pipeline repair device is expanded to press the repair material against the inner surface side of the pipeline. In general, the insertion position of the pipeline repair device in a reduced state is not located at the center in the pipeline cross section, but is a position deviated downward.

[0004]

Therefore, when the pipeline repair device is arranged at such a position and expanded, the repair material mounted on the pipeline repair device is simultaneously spread over the entire inner surface of the pipeline. Does not adhere, but adheres at any part, and then the attachment area is sequentially enlarged and adheres over the entire inner surface of the conduit.

[0005] Since the overlapping portion of the repair material is formed on the outer peripheral surface of the flexible membrane of the pipe line repair device that goes through such an attaching process as described above, the overlapping portion is first placed in the pipe. If it adheres to the inner surface of the road, the supply of the repair material from the overlapping portion due to the expansion of the expansion chamber is not performed smoothly, which causes a defect in the repair structure.

The present invention has been made in view of such circumstances, and obtains a sound repair structure by smoothly maintaining the supply behavior of the repair material mounted on the pipeline repair device from the overlapping portion. The purpose is to do so.

[0007]

In order to achieve this object, the invention according to claim 1 includes an expansion chamber which is capable of expanding radially outward of a pipeline, and the outer periphery of the expansion chamber is flexible. A repair material impregnated with an uncured synthetic resin is mounted on the outside of the flexible film of the pipeline repair device in a reduced state using a pipeline repair device formed of a film, and the pipeline repair device is connected to the pipeline repair device. In a predetermined position in the inside of the expansion chamber to expand the expansion chamber, wherein a flexible film around the expansion chamber is provided with an adhesion promoting portion which partially promotes the adhesion of the repair material to the inner surface of the conduit. Mounting the repair material such that the overlapping portion and the non-overlapping portion coexist around the expansion chamber, and positioning the non-overlapping portion on the adhesion promoting portion, and expanding the expansion chamber to promote the adhesion promotion. The non-overlapping part of the section first adheres to the inner surface of the conduit A conduit repair method according to claim.

[0008]

According to the pipe repair method of the first aspect, the repair material is mounted so that the overlapping portion is located avoiding the adhesion promoting portion formed on the flexible film of the pipe repair apparatus, and the expansion chamber is formed. Since the non-overlapping portion on the adhesion promoting portion is first adhered to the inner surface of the conduit by inflation, the supply behavior of the repair material from the overlapping portion is not impaired and can be maintained smoothly, and a sound repairing structure Can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to a first embodiment shown in FIGS. 1 to 4. First, the structure of the pipeline repair device of the first embodiment will be described, and then the pipeline repair method will be described. Give an explanation.

1 and 3, reference numeral 1 denotes a pipeline repair device.

The pipe repairing apparatus 1 has a tubular member 2 at the center shaft portion, and stays 3 extending outward and downward are fixed to both ends of the tubular member 2.
The lower end of each of the wheels is provided with two rotatable wheels 4 (FIG. 3).

A flexible film 5 made of a flexible material such as rubber and formed in a substantially cylindrical shape with a uniform thickness is mounted on the outer peripheral side of the cylindrical member 2. Are hermetically attached to the ends of the cylindrical member 2 with stop rings 6, respectively. A cylindrical expansion chamber R is formed between the flexible film 5 and the cylindrical member 2.

An air hole 7 is formed in the upper part of the inner surface of the cylindrical member 2, and a hose 8 is connected to the air hole 7. The hose 8 supplies compressed air from an air compressor to the expansion chamber R as described later, and supplies and discharges the flexible membrane 5 to the underground conduit by supplying and discharging the compressed air.
21 can be bulged radially outward.

The cross-sectional shape of the tubular member 2 of this embodiment is a vertically long oval as shown in FIG. 1, and is specifically formed in an oval shape.
The outer shape of the flexible film 5 mounted on the outer peripheral side of the cylindrical member 2 has the same oval shape. The cross-sectional shapes of the tubular member 2 and the flexible membrane 5 are similar to the cross-sectional shape of a pipe 21 to be described later, and the reason why they are oval will be described later.

1 and 3, reference numeral 11 denotes a repair material, and reference numeral 12 denotes a positioning rope of the pipeline repair device 1.

The repair work of the pipe 21 as a drain pipe using such a pipe repair apparatus 1 is performed as follows.

In FIG. 2, reference numeral 21 denotes a pipe, 22 denotes a manhole, and the pipe 21 has an oval cross section, and has cracks 21a.

At the time of such a repair work of the pipeline 21, first, a sheet-like base material prepared according to the inner diameter of the pipeline 21 to be repaired is sufficiently impregnated with a synthetic resin.

That is, the repair material 11 is made of a woven or nonwoven fabric made of reinforcing fibers such as glass fiber or plastic fiber as a base material, and an uncured resin such as unsaturated polyester or thermosetting resin as a synthetic resin. Is used.

Thereafter, the two repair materials 11 prepared as described above are placed on the surface of the flexible film 5 of the pipeline repair device 1 in which the expansion chamber R is in a contracted state, as shown in FIG. In the following, these two repair materials
The repair materials 11a and 11b are mounted on one side and the repair material 11b on the other side, with the ends of the repair materials 11a and 11b being overlapped at upper and lower portions.

Thus, on the outer periphery of the flexible film 5, overlapping portions D of the repair materials 11a and 11b are formed at the upper and lower portions, and the left and right side portions are respectively provided with one of the repair materials 11a and 11b. Only the non-overlapping portion N is attached.

In this state, the pipeline repair device 1
The pipe repair device 1 is arranged at a position facing the crack 21a inside the pipe 1. The manhole 2 installed on both sides of the pipe 21 in which the crack 21a exists is disposed.
This is performed by pulling the positioning rope 12 from both sides in 2.

In the state where the pipeline repair device 1 is thus disposed in the pipeline 21, the major axis of the cross section of the pipeline repair device 1 is the major axis P that is oriented in the vertical direction of the cross section of the pipeline 21. -P.

As shown in FIG. 2, the pipeline repairing device 1 arranged at a required position in the pipeline 21 is mounted on the bed 23 of the work truck through the hose 8. It is connected to the discharge port of the air compressor 24.

Therefore, when the air compressor 24 is operated to supply compressed air into the expansion chamber R of the pipeline repair device 1, the flexible membrane 5 starts expanding radially outward of the pipeline 21.

In this embodiment, since the outer shape of the flexible membrane 5 is egg-shaped as described above, if compressed air is supplied into the expansion chamber R therein, the flexible membrane 5 first has its cross-sectional shape. Expands closer to a circle.

That is, in the pipeline repair apparatus 1 of this embodiment, a portion of the flexible membrane 5 on the side orthogonal to the major axis PP (hereinafter, referred to as a side portion) is a portion on the major axis PP side (hereinafter referred to as a side portion). Therefore, the side portion of the flexible film 5 corresponds to the adhesion promoting portion Q of the present invention.

Also, with the expansion of the flexible film 5,
Since the length around the outer periphery of the flexible film 5 increases and the repairing materials 11a and 11b are pulled out from the upper and lower overlapping portions D, the repairing materials 11a and 11b at the overlapping portion D are provided.
Overlap width becomes shorter.

When such expansion of the flexible film 5 proceeds,
Eventually, the flexible membrane 5 of the pipeline repair device 1 comes into contact with the inner surface of the pipeline 21, but in this embodiment, the outer peripheral side of the side portion of the flexible membrane 5 first contacts the inner surface of the pipeline 21. It will be pressed and attached (see the phantom line in FIG. 1).

As described above, the repair materials 11a and 11b which are sandwiched between the inner surface of the conduit 21 and the flexible film 5 and are pressed and adhered on the inner surface of the conduit 21 are thereafter moved from that position. Although there is almost no deviation, the supply of the repair materials 11a and 11b following the expansion of the flexible membrane 5 by the supply of the compressed air thereafter is performed from the upper and lower overlapping portions D as described above, so that there is no problem. Instead, the attachment areas of the repair materials 11a and 11b are sequentially enlarged, and finally, the repair materials 11a and 11b are securely attached to the entire circumferential direction of the pipe 21 to complete the expansion of the flexible film 5.

In this embodiment, even when the expansion of the flexible film 5 is completed, the upper and lower overlapping portions D are left, so that the repair material 11a, 11b forms the repair structure while maintaining the tubular shape. Becomes

When the internal pressure of the expansion chamber R reaches a predetermined value after the expansion of the flexible membrane 5 is completed, the supply of the compressed air to the expansion chamber R is stopped.

When the supply of the compressed air is stopped, the repair material 11 mounted on the outer periphery of the pipeline repair device 1
The a and 11b are pressed against the inner surface of the pipeline 21 with a predetermined pressure, and the crack 21a existing at that portion is repaired.

In this repair work, the repair material 11
Since it is necessary to maintain the pressed state of a and 11b for two to three hours until the curing thereof is completed, the internal pressure of the expansion chamber R is maintained as it is.

When the curing of the repair materials 11a and 11b is completed in this way, the air in the pipeline repair device 1 is discharged next.

As a result, the flexible film 5 of the pipeline repair device 1 that has been expanded at a predetermined pressure contracts, and the positioning rope 12 is pulled to move the pipeline repair device 1 from the pipeline 21 into the manhole 22. The drawer repair work ends.

In the first embodiment described above, the cross section of the flexible membrane 5 of the pipeline repair device 1 is formed in an oval shape, and the side portion of the flexible membrane 5 on the side orthogonal to the major axis PP is promoted in adhesion. Part Q
The repair material 11 is provided on the upper and lower portions on the longer diameter PP side.
a, 11b, and a non-overlapping portion N of the repair materials 11a, 11b is provided on a side portion orthogonal to the major axis PP.
Is arranged, it is possible to prevent the overlapping portion D from adhering to the inner surface of the pipe line 21 and to cause a defective supply of the repair materials 11a and 11b, thereby reliably forming a sound repair structure.

In the description of the first embodiment,
The repair material using two repair materials 11a and 11b has been described above, but a single repair material 15 formed in a tubular shape in advance may be used.

The formation of the overlapping portion D and the non-overlapping portion N using such a tubular repair material 15 is carried out in the same manner as in the first embodiment, as schematically shown in FIG. The repair material 15 may be folded in the upper and lower portions on the longer diameter side of the flexible film 5 and the single-layer repair material 15 may be located on the portion orthogonal to the longer diameter. Other points are the same as those described above.

Further, in the above description of the first embodiment, the cross-sectional shape of the pipeline 21 to be repaired has been described as having an oval shape, but the present invention is not limited to this, and other shapes such as a circular cross-section may be used. This can be carried out in substantially the same manner as described above, and in that case, various structures for promoting adhesion described later may be used in combination.

Next, the second to fourth embodiments will be described. Each of the embodiments is characterized by the structure of the adhesion promoting portion, and the other points are the same as those of the first embodiment.
Since the configuration is the same as that of the embodiment, only the configuration of the adhesion promoting portion will be described below.

In the second embodiment shown in FIG. 5, the thin portions 32 are formed at the upper and lower portions on the long diameter PP side of the flexible film 31 having an oval cross section.

Therefore, when compressed air is supplied into the expansion chamber R formed in the flexible film 31, the thin portion 3
2 swells more easily than the other portions, and has an expanded shape longer in the major axis direction than when the thickness of the flexible film is formed uniformly.

In the case of repairing the pipe 21 having a circular cross section by the pipe repair apparatus 1 having such a flexible film 31, the thin portion 32 is made of a repair material mounted on the outside thereof. 21 will function as an adhesion promoting portion Q to be first pressed and adhered to the inner surface.

In the third embodiment shown in FIG. 6, an air cylinder 35 is installed in the expansion chamber R below the flexible film 34 having an oval cross section, and the air cylinder 35 is used to move the air cylinder 35 in the major axis PP direction. A pressing member 36 that can move up and down in the vertical direction is arranged to mechanically form the adhesion promoting portion Q.

Therefore, the upper and lower portions of the flexible film 34 which are pressed outward by the pressing member 36 function as the adhesion promoting portions Q, and the repair material mounted on the outside is replaced with the repair material mounted on the other portions. It can be pressed and adhered to the inner surface of the conduit earlier than the material.

In the pipeline repair device having the adhesion promoting portion Q, before the flexible film 34 is expanded with the compressed air,
The repair material on the adhesion promoting portion may be adhered to the inner surface of the pipe by extending the air cylinder 35, and then the compressed air may be supplied into the flexible film 34 to expand it.

In the fourth embodiment shown in FIG. 7, the pipeline repair device 41 is constructed in substantially the same manner as in the first embodiment, but the flexible film 5 is formed by the tubular member 2, the flexible film 5, and the like. The only difference is that a device body 42 configured to be inflatable and contractible is mounted on wheels 4 via a jack device 43 composed of an air cylinder or the like.

In such a pipeline repair device 41,
Similar to the first embodiment, the jack 44 is disposed at a required position in the pipeline 44, and thereafter, the jack device 43 is extended, the device main body 42 is lifted, and the repairing device mounted on the upper surface of the flexible membrane 5 is repaired. The material is pressed and adhered to the ceiling of the pipeline 44.

Therefore, in this embodiment, the upper portion of the flexible film 5 is the adhesion promoting portion, and the overlapping portion D of the repair material may be provided in the same manner as in the first embodiment. .

[0051]

As described above, according to the pipeline repair method of the first aspect, the repair is performed so that the overlapping portion is located avoiding the adhesion promoting portion formed on the flexible film of the pipeline repair device. Since the non-overlapping portion on the adhesion promoting portion is first adhered to the inner surface of the conduit by mounting the material and expanding the expansion chamber, the supply behavior of the repair material from the overlapping portion is not impaired and is maintained smoothly. And a sound repair structure can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line AA of FIG.

FIG. 2 is an explanatory diagram of a pipeline repair work.

FIG. 3 is a longitudinal sectional view of the pipeline repair device of the first embodiment.

FIG. 4 is an explanatory diagram of a repair material attachment state according to a modified example.

FIG. 5 is a sectional view of a flexible membrane according to a second embodiment.

FIG. 6 is a structural explanatory view of a third embodiment.

FIG. 7 is a schematic view of a fourth embodiment.

[Explanation of symbols]

D Overlapping portion N Non-overlapping portion Q Adhesion promoting portion R Expansion chamber 5 , 31, 34 Flexible membrane 11, 11a , 11b , 15 Repair material 21 , 44 Pipe line

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Shinohara 1-18-7 Senriyama Takezono, Suita-shi, Osaka (56) References JP-A-5-16235 (JP, A) JP-A 64-64828 (JP) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 55/16-55/165 B29C 63/26-63/34

Claims (7)

(57) [Claims] 1. An apparatus according to claim 1, further comprising an expansion chamber capable of expanding outward in a radial direction of the pipeline, wherein said pipeline repair apparatus is in a contracted state using a pipeline repair apparatus having an outer periphery formed of a flexible film. A repair material impregnated with an uncured synthetic resin is mounted on the outside of the flexible film, and the pipeline repair device is arranged at a required position in the pipeline to expand the expansion chamber. A flexible film around the chamber is provided with an adhesion promoting portion that partially promotes the adhesion of the repair material to the inner surface of the pipe, and an overlapping portion and a non-overlapping portion of the repair material coexist around the expansion chamber. So that the non-overlapping portion is located on the adhesion promoting portion, and the non-overlapping portion on the adhesion promoting portion is first adhered to the inner surface of the conduit by expanding the expansion chamber. Pipeline repair method. 2. The pipeline repair method according to claim 1, wherein
The conduit is an oval conduit with its major axis directed vertically, and the conduit repair device is similar in cross-sectional shape to a reduced cross-sectional shape of the conduit. The long axis is inserted vertically into the pipe, and both sides of the expanded section of the pipe repair device are used as adhesion promoting sections, and the upper and lower sides of the expanded section are repaired. A method for repairing a pipeline characterized by locating overlapping portions of materials. 3. A pipeline repairing device comprising an expansion chamber capable of expanding radially outward of a pipeline, wherein an outer periphery of the expansion chamber is formed of a flexible film, wherein the pipeline repair is in a contracted state. A device in which a repair material impregnated with an uncured synthetic resin is attached to the outside of the flexible membrane of the device, wherein the repair material is partially attached to a side portion around the expansion chamber to promote adhesion of the repair material to an inner surface of a pipe. A pipeline repair device having an adhesion promoting portion. 4. The pipeline repair device according to claim 3,
A pipeline repair device, characterized in that a cross-sectional shape of the pipeline repair device is substantially vertically long and oblong, and a flexible film located on a side orthogonal to the major axis is an adhesion promoting portion. 5. The pipeline repair device according to claim 3,
A pipe repair device, wherein the flexible film is partially thinned in a side portion around the expansion chamber to serve as the adhesion promoting portion. 6. The pipeline repair device according to claim 3,
A mechanical pressing means provided in the expansion chamber so as to be able to advance outward in the radial direction of the pipe, and a portion on the flexible film pressed by the pressing means is used as the adhesion promoting portion. Repair equipment. 7. The pipeline repair device according to claim 3,
Mechanically moving means for radially moving the pipeline repair device in the pipeline to press one side of the flexible membrane against the inner surface of the pipeline, and being pressed against the inner surface of the pipeline by this mechanical moving means. Wherein the portion on the flexible film is the adhesion promoting portion.