JP2010101354A - Repair tool and repair method for leak position of pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a repair tool and a repair method capable of easily repairing the leak position of a pipe through which a high-pressure fluid flows in a short time without stopping the flow of the fluid. <P>SOLUTION: This repair tool 1 includes a two-split body 3 which is attached to the leak position 26 of the pipe 25 and can cover the periphery of the leak position 26 at an interval, a relief pipe 16 penetrating through the body 3, and at least one opening/closing valve 17, 18 for opening/closing the relief pipe 16. The opening/closing valves 17, 18 of the repair tool 1 in an opened state are attached to the leak position 26 of the pipe 25 in such a manner as to cover the periphery of the leak position 36 at an interval with the body 3, and the opening/closing valves 17, 18 are closed to stop the leakage of the fluid from the leak position 26. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a repairing tool and repair method for a leaking part of piping, and more particularly to a repairing tool and repairing method for a leaking part of piping effective for repairing a leaking part of piping through which a high-pressure fluid flows.

  In general, when leakage due to corrosion or the like occurs in the piping system of various plants or the like, a method such as wrapping tape or a band around the leakage point and repairing is taken, but the fluid flowing through the piping system is high pressure In this case, the above method cannot be used.

  For this reason, the operation of various plants must be stopped and the leakage of the piping must be repaired in a state where the flow of the fluid is stopped. Repairing the leakage is time consuming and troublesome, and the repair is completed. Until then, the operation of various plants must be stopped.

An example of a method for repairing a leaked portion of piping is disclosed in Patent Document 1. This repair method is applicable to the repair of piping leaks in piping systems such as chemical plants.In this state, a pad presser is inserted into the piping leak point of the piping system so as to adhere to the inner surface of the piping. Fill the leaking part with adhesive from the outer surface side of the pipe and let it harden, and then stack the packing presser via the reinforcing cloth material impregnated with the adhesive on the outer surface side of the pipe leaking part. It is configured to repair the leaked part by tightening between the presser foot with bolts and nuts.
Japanese Patent Laid-Open No. 2-89897

  However, in the repair method having the above-described configuration, when repairing a leaked part of the piping of the piping system, the leaked part must be repaired with the flow of fluid flowing through the piping system stopped. Therefore, it takes time and labor to repair the leaked part of the piping. Moreover, the operation of the plant or the like must be stopped until the repair of the leaked portion is completed.

  The present invention has been made in view of the above-described conventional problems, and the operation of a plant or the like is stopped and the leakage of piping in the piping system is stopped without stopping the flow of high-pressure fluid flowing through the piping system. An object of the present invention is to provide a repairing tool and a repair method for a leaking part of a pipe that can repair a leaking part and can easily repair the leaking part in a short time.

In order to solve the above problems, the present invention employs the following means.
That is, the present invention is a repair tool for a leaking part of a pipe through which a high-pressure fluid flows, and is divided into two parts that are attached to the outer peripheral surface of the pipe at an interval so as to cover the periphery of the leaking part of the pipe. And a relief pipe penetrating the inside and outside of the body, and at least one on-off valve for opening and closing the relief pipe.

  According to the pipe leakage point repair tool of the present invention, by attaching the body to the pipe leakage point with the open / close valve opened, the body can be connected to the pipe without stopping the flow of high-pressure fluid flowing through the pipe. It can be attached to the leak location and the body can cover the leak location with a gap. After that, by closing the on-off valve, the flow of fluid from the relief pipe can be stopped, and the leakage of fluid from the leaked portion of the pipe can be stopped.

  The present invention is also a method for repairing a leaking part of a pipe through which a high-pressure fluid flows, and is divided into two parts that are attached to the outer peripheral surface of the pipe with a space so as to cover the periphery of the leaking part of the pipe. And a relief pipe that penetrates the inside and outside of the body, and at least one on-off valve that opens and closes the relief pipe. It attaches to a location, the circumference | surroundings of the said leak location are coat | covered at intervals by this body, and the said on-off valve is closed after this.

  According to the method for repairing a leakage point of piping according to the present invention, the body is attached to the piping with the on-off valve opened, so that the body can be turned into the leakage point of the piping without stopping the flow of the high-pressure fluid flowing through the piping. It can be attached, and the body can cover the periphery of the leak location at intervals. After that, by closing the on-off valve, the flow of fluid from the relief pipe can be stopped, and the leakage of fluid from the leaked portion of the pipe can be stopped.

  Further, according to the present invention, the on-off valve includes an inner first on-off valve and an outer second on-off valve, and the body is connected to the pipe with the first on-off valve and the second on-off valve opened. Attach to the leakage location, and then close the first on-off valve and fill the sealant between the first on-off valve and the second on-off valve via the relief pipe, and then the second on-off valve The valve may be closed, the first on-off valve may be opened, and the sealing agent may be filled around the leaked portion of the piping and cured.

  According to the method for repairing a leakage point of a pipe according to the present invention, after the body is attached to the pipe, the first on-off valve is closed, and the sealing agent is placed between the first on-off valve and the second on-off valve via the relief pipe. After filling, and then closing the second on-off valve and filling the sealant around the leaked part of the pipe and curing it, a seal film covering the periphery of the leaked part can be formed.

  As described above, according to the repair tool and repair method for a pipe leakage point according to the present invention, when repairing a pipe leak point through which a high-pressure fluid flows, operation of various plants is stopped, Without stopping the flow of the high-pressure fluid flowing through the pipe, it is possible to easily repair the leaked portion of the pipe in a short time.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show an embodiment of a repair tool and a repair method for a leakage point of piping according to the present invention. FIG. 1 is a schematic diagram showing the entire repair device for a leak location, FIGS. 2 to 4 are explanatory diagrams showing the procedure of a repair method for the leak location, and FIG. 5 is a schematic diagram showing the leak location of a pipe.

  That is, the repair tool and repair method for a pipe leakage point according to the present embodiment are effective for repairing a pipe leak point in various piping systems such as various plants through which high-pressure fluid (air, etc.) flows. The repairing device 1 shown in FIG. 1 is used to repair the leaked portion 26 without stopping the flow of the high-pressure fluid flowing through the pipe 25.

  As shown in FIGS. 1 to 4, the repair tool 1 includes a substantially cylindrical body 2, a relief pipe 16 that penetrates the inside and outside of the body 2, on-off valves 17 and 18 that open and close the relief pipe 16, and a body 2. Sealing members 12 and 13 that seal between the pipe 25 and a sealing agent 19 that is filled between the body 2 and the pipe 10.

  The body 2 is constituted by dividing a cylindrical short pipe into two, and includes a first semi-cylindrical first body 3 and a second semi-cylindrical second body 7. The two bodies 7 are combined to form a substantially cylindrical shape.

  Rectangular plate-like first flanges 6, 6 are integrally provided at both ends in the circumferential direction of the first body 3, and the first body 3 has first ends at both ends in the circumferential direction. The rectangular plate-like second flanges 10 and 10 having the same size as the flange 6 are integrally provided so as to project outward, and the first flange 6 and the second flange 10 have insertion holes (not shown). Are provided at a plurality of locations.

  The first flange 3 of the first body 3 and the second flange 10 of the second body 7 are overlapped with each other by matching the opening of the first body 3 and the opening of the second body 7. By using each insertion hole of the flange 6 and each insertion hole of the second flange 10 to connect the first flange 6 and the second flange 10 by the screw fastening body 11, a substantially cylindrical body is obtained. 2 is configured.

  The screw fastening body 11 includes, for example, a bolt inserted between each insertion hole of each first flange 6 and each insertion hole of each second flange 10, and a nut screwed to the bolt via a washer. Composed.

  The first body 3 has a substantially semi-cylindrical large-diameter portion 4 whose inner diameter is larger than the outer diameter of the pipe 25 and is integrally provided at both ends of the large-diameter portion 4 in the longitudinal direction. It is comprised from the substantially semi-cylindrical small diameter parts 5 and 5 of the diameter substantially the same.

  Similar to the first body 3, the second body 7 is provided integrally with the substantially semi-cylindrical large-diameter portion 8 whose inner diameter is larger than the outer diameter of the pipe 25, and both ends in the longitudinal direction of the large-diameter portion 8. The small-diameter portions 9 and 9 having a substantially semi-cylindrical shape whose inner diameter is substantially the same as the outer diameter of the pipe 25.

  The first body 3 and the second body 7 may be configured by forming the substantially semi-cylindrical large-diameter portions 4 and 8 and the small-diameter portions 5 and 9 separately and connecting them together by welding or the like. Alternatively, both may be integrally formed by machining or the like.

  A through hole 4a penetrating between the inner and outer surfaces of the large diameter portion 4 of the first body 3 is provided at the longitudinal center of the large diameter portion 4 of the first body 3 so as to communicate with the through hole 4a. A relief pipe 16 is integrally provided on the outer surface side of the large diameter portion 4 of the first body 3 by welding or the like.

  The relief pipe 16 is provided with a first opening / closing valve 17 on the inner side (large-diameter portion 4 side) and an outer second opening / closing valve 18 arranged in series at a predetermined distance, and each opening and closing the relief pipe 16 independently. It is configured to be possible.

  In this case, the volume of the relief pipe 16 positioned between the first on-off valve 17 and the second on-off valve 18 is such that the outer peripheral surface of the pipe 25, the inner peripheral surface of the large diameter portion 4 of the first body 3, and the second body. 7, the inner diameter of the relief pipe 16, and between the first on-off valve 17 and the second on-off valve 18 so as to be substantially the same as the volume of the gap 15 formed between the inner diameter surface of the large-diameter portion 8. The distance is set.

  The first on-off valve 17 and the second on-off valve 18 are not particularly limited as long as they have a function capable of opening and closing the relief pipe 16, and various on-off valves (ball valve, rose fly valve, ball valve, etc.) are used. Can do.

  In the present embodiment, the relief pipe 16 is provided in the large diameter portion 4 of the first body 3, but the relief pipe 16 may be provided in the large diameter portion 8 of the second body 7. However, it may be configured to be provided on both the large diameter portion 4 of the first body 3 and the large diameter portion 8 of the second body 7.

  The seal members 12 and 13 are made of an elastic material such as rubber, and have a predetermined size and shape that match the first flange 6 of the first body 3 and the second flange 10 of the second body 7. A first seal member 12 having a thickness, and a second seal member 13 having a predetermined thickness and shape matching the inner surface of the small diameter portion 5 of the first body 3 and the inner surface of the small diameter portion 9 of the second body 7 are provided. ing.

  The sealing agent 19 forms a liquid that can be filled around the leaked portion 26 of the pipe 25, and forms a seal film 21 that hardens after filling and coats the periphery of the leaked portion 26. As the sealing agent 19, for example, various liquid gaskets such as a silicone liquid gasket can be used.

  In order to repair the leakage portion 26 (see FIG. 5) of the pipe 25 of the piping system through which the high-pressure fluid flows using the repair tool 1 configured as described above, first, as shown in FIG. With the first on-off valve 17 and the second on-off valve 18 of the one relief pipe 16 opened, the first body 3 and the second body 7 are disposed above and below the leaking portion 26 of the pipe 25.

  Next, each first flange 6 of the first body 3 and each second flange 10 of the second body 7 are opposed to each other, and each first flange 6 of the first body 3 and each second flange 10 of the second body 7. The first seal member 12 is interposed between the second seal member 13 and the second seal member 13 is interposed between the inner surface of each small-diameter portion 5 of the first body 3 and the outer surface of the pipe 25. The second seal member 13 is interposed between the inner surface of 9 and the outer surface of the pipe 25.

  Next, using each insertion hole of each first flange 6 and each insertion hole of each second flange 10, each first flange 6 and each of the first flanges 6 are tightened by screw fastening bodies 11 (bolts, washers, nuts). The 2 flange 10 is fastened.

  In this case, since the first on-off valve 17 and the second on-off valve 18 are opened, the first body 3 and the second body are released while releasing the high-pressure fluid leaking from the leakage portion 26 of the pipe 25 from the relief pipe 16. 7 can be attached to the leak location 26 of the pipe 25, and the first body 3 and the second body 7 can be easily attached to the leak location 26 of the pipe 25 in a short time without being affected by the high-pressure fluid. .

  In this way, by attaching the repair tool 1 to the leak location 26 of the pipe 25, the leak of the pipe 25 is caused by the large diameter part 4 of the first body 3 and the large diameter part 8 of the second body 7 of the repair tool 1. The substantially cylindrical space 15 surrounding the periphery of the location 26 can be formed in a sealed state.

  Next, as shown in FIG. 3, the first on-off valve 17 of the relief pipe 16 is closed to stop the flow of fluid that has escaped from the relief pipe 16. Thereby, the leakage of the fluid from the leak location 26 of the pipe 25 can be stopped, and the repair of the leak location 26 of the pipe 25 is completed.

  Here, if necessary, the sealing agent 19 is supplied to the relief pipe 16 with the second opening / closing valve 18 open, and the sealing agent 19 is filled between the first opening / closing valve 17 and the second opening / closing valve 18. The second on-off valve 18 is closed, and in this state, as shown in FIG. 4, the first on-off valve 17 is opened and the sealing agent 19 is filled into the gap 15 around the leaked portion 26 of the pipe 25, The sealing agent 19 may be hardened in the gap 15 by holding for a period of time to form a substantially cylindrical sealing film 2120 that covers the periphery of the leaked portion 26 of the pipe 25.

  In this case, since the pressure in the gap 15 is maintained substantially the same as the pressure in the pipe 25, the sealing agent 19 is not blown back by the pressure of the fluid flowing through the pipe 25. It is possible to easily fill and harden the sealing agent 19 in the whole.

  In the repairing tool and repairing method for a pipe leakage point according to the present embodiment configured as described above, when the repairing tool 1 is used to repair the leaking part 26 of the pipe 25 in the piping system, Since the first body 3 and the second body 7 can be attached to the pipe 25 while letting the circulating high-pressure fluid escape from the relief pipe 16, the plant or the like is stopped and the flow of the high-pressure fluid flowing through the pipe 25 is stopped. In addition, repair of the leaked portion 26 of the pipe 25 can be easily performed in a short time.

  In addition, if necessary, a sealing agent 19 is filled in the gap 15 formed by the large diameter portion 4 of the first body 3 and the large diameter portion 8 of the second body 7 of the repair tool 1 and cured, thereby piping. Since the sealing film 2120 covering the periphery of the 25 leaking locations 26 can be formed, the leakage of fluid from the leaking locations 26 can be more effectively stopped.

It is the schematic which showed the whole repair tool of the leaking location of the piping by this invention. It is explanatory drawing which showed the procedure of the repair method of the leaking location of piping by this invention. It is explanatory drawing which showed the procedure of the repair method of the leaking location of piping by this invention. It is explanatory drawing which showed the procedure of the repair method of the leaking location of piping by this invention. It is the schematic which showed the leak location of piping.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Repair tool 2 Body 3 1st body 4 Large diameter part 4a Through-hole 5 Small diameter part 6 1st flange 7 2nd body 8 Large diameter part 9 Small diameter part 10 2nd flange 11 Screw fastening body 12 1st seal member 13 2nd Seal member 15 Gap 16 Relief pipe 17 First on-off valve 18 Second on-off valve 19 Sealing agent 20 Seal film 25 Piping 26 Leakage location

Claims (3)

A repair tool for leaking parts of piping through which high-pressure fluid flows,
A split body that is attached to the outer peripheral surface of the pipe at an interval so as to cover the periphery of the leaked part of the pipe, a relief pipe that penetrates the inside and outside of the body, and at least one that opens and closes the relief pipe A repair tool for leaking parts of piping, characterized by comprising two on-off valves. A method for repairing a leaking part of a pipe through which a high-pressure fluid flows,
A split body that is attached to the outer peripheral surface of the pipe at an interval so as to cover the periphery of the leaked part of the pipe, a relief pipe that penetrates the inside and outside of the body, and at least one that opens and closes the relief pipe Using a repair tool with two on-off valves,
Leakage of a pipe characterized in that the body is attached to a leak location of the pipe with the on-off valve open, the periphery of the leak location is covered with the body at an interval, and then the on-off valve is closed. How to repair the location.   The on-off valve is composed of an inner first on-off valve and an outer second on-off valve, and the body is attached to a leakage point of the pipe with the first on-off valve and the second on-off valve opened. Later, the first on-off valve is closed, a sealing agent is filled between the first on-off valve and the second on-off valve via the relief pipe, and then the second on-off valve is closed, The method for repairing a leaking part of a pipe according to claim 2, wherein the on-off valve is opened and the sealing agent is filled around the leaking part of the pipe and hardened.

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