Water-cutoff band device

Abstract

To prevent fluid from leaking from a pin hole of a pipe.SOLUTION: A water-cutoff band device 10 comprises a rectangular rubber patch 11 covering pin holes 2 spirally scattered in a pipe 1, and a band 20 that holds the rubber patch 11 from the outside. The band 20 is tightened by a fastener 30.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a water stop band device for stopping a fluid leaking from a pinhole formed in a pipe.

Background Art

[0002] Conventionally, a repair device has been used to stop a fluid leaking from a pinhole formed in a pipe.

[0003] Such a repair device has a structure for stopping water leakage not only from the pinhole but also from the entire pipe, and thus the structure of the entire repair device is large-scale.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present disclosure has been made in consideration of such points, and an object thereof is to provide a water stop band device that can prevent the outflow of a fluid limited to a pinhole formed in a pipe and its vicinity and has a compact structure as a whole.

Means for Solving the Problems

[0005] The present disclosure provides a water stop band device for stopping a fluid leaking from a plurality of pinholes scattered in a pipe, including a rectangular rubber patch that covers the plurality of pinholes from the outside of the pipe, a plurality of bands that press the rubber patch from the outside and are wound around the pipe, and a fastener for tightening each band. Each band is arranged along the circumferential direction on the outer surface of the pipe, and a water stop protrusion for forming a water stop region is formed on the inner surface of the rubber patch.

[0006] The present disclosure provides a water stop band device, wherein the plurality of pinholes are scattered in a welded portion linearly extending in the pipe.

[0007] The present disclosure relates to a water-stop band device in which the water-stop protrusions are formed in a lattice pattern on the inner surface of the rubber patch, and the water-stop region is formed in a rectangular shape by the lattice-shaped water-stop protrusions.

[0008] The present disclosure relates to a water-stop band device in which the welded portion is formed in a spiral shape on the pipe.

[0009] The present disclosure relates to a water-stop band device in which the welded portion is formed in a circumferential shape on the pipe.

Advantages of the Invention

[0010] As described above, according to the present disclosure, it is possible to stop water limited to the pinholes formed in the pipe through which the fluid flows and the vicinity thereof, and the overall structure can be configured compactly.

Brief Description of the Drawings

[0011]

Figure 1A

Figure 1B

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6A

Figure 6B

Figure 7A

Figure 7B

Figure 8A

Figure 8B

Figure 8C

[0012] Hereinafter, an embodiment of a band device for water stoppage according to the present disclosure will be described with reference to the drawings.

[0013] First, the outline of the band device 10 for water stoppage will be described with reference to FIGS. 1A, 1B, and 2.

[0014] The band device 10 for water stoppage stops a fluid such as ammonia gas leaking from a pinhole 2 formed in a cylindrical pipe 1.

[0015] That is, as shown in FIG. 2, the pipe 1 is obtained by joining a plurality of portions 1A by a helically extending seam weld portion 1B. A fluid such as ammonia gas flows in such a pipe 1.

[0016] And a plurality of pinholes 2 may be scattered along the helically extending seam weld portion 1B in the pipe 1.

[0017] The band device 10 for water stoppage according to the present embodiment stops a fluid leaking from a plurality of pinholes 2 scattered along the helically extending seam weld portion 1B of the pipe 1.

[0018] In the present embodiment, an example in which a fluid such as ammonia gas flows in the pipe 1 is shown, but the present invention is not limited to this, and a fluid such as a chemical or a fluid such as steam may flow in the pipe 1.

[0019] In addition, an example in which the pipe 1 is configured by joining a plurality of portions 1A by a helical seam weld portion 1B is shown, but the present invention is not limited to this, and the pipe 1 may be configured by joining a plurality of portions 1A by a circumferentially extending seam weld portion 1B.

[0020] In this case, the band device 10 for water stoppage according to the present disclosure can stop the fluid leaking from a plurality of pinholes 2 scattered along the circumferentially extending seam weld portion 1B of the pipe 1.

[0021] Hereinafter, in this embodiment, the pipe 1 has a helically extending seam weld portion 1B, and an example in which the band device 10 for water stoppage stops the fluid leaking from the pinholes 2 scattered along this seam weld portion 1B will be described.

[0022] However, it is also possible to cover a plurality of pinholes 2 scattered regardless of the seam weld portion 1B by using the band device 10 for water stoppage according to the present disclosure and stop the fluid leaking from the pinholes 2.

[0023] Such a band device 10 for water stoppage includes a rubber patch 11 that covers a plurality of pinholes 2 formed along the helically extending seam weld portion 1B of the pipe 1 from the outside of the pipe 1, a plurality of, for example, four bands 20 that press the rubber patch 11 from the outside and are wound around the pipe 1, and a fastener 30 that tightens each band 20.

[0024] Among these, the four bands 20 are all circumferentially arranged around the pipe 1, and the four bands 20 press the rubber patch 11 from the outside.

[0025] The rubber patch 11 covers the pinholes 2 from the outside of the pipe 1, and is made of a rubber patch mainly containing ethylene propylene diene rubber (EPDM) and has a rectangular shape in plan view. This EPDM rubber is excellent in heat resistance, chemical resistance, durability, and weather resistance.

[0026] Specifically, as shown in FIGS. 2 to 5, the rubber patch 11 has a rectangular shape in plan view and has an inner surface 11A and an outer surface 11B. A water-stop protrusion 12 extending linearly is formed on the inner surface 11A of the rubber patch 11, and the water-stop protrusion 12 is formed in a lattice shape. And inside the water-stop protrusion 12 formed in a lattice shape, a concave water-stop region 13 descending from the water-stop protrusion 12 is formed (see FIG. 3).

[0027] That is, the fluid leaking from the pipe 1 through the pinhole 2 stops within the water-stop region 13 surrounded by the water-stop protrusion 12 of the rubber patch 11 so as not to leak outward from the rubber patch 11.

[0028] In the present embodiment, the rubber patch 11 has a rectangular shape, its length is L, and its width is L1 (see FIG. 2).

[0029] Also, on the inner surface of the rubber patch 11, a plurality of water-stop regions 13 surrounded by the water-stop protrusion 12 are formed, and the plurality of water-stop regions 13 have the function of stopping the fluid so that the fluid does not leak outward.

[0030] In the present embodiment, a rectangular water-stop range 13A for stopping the fluid is constituted by a plurality of water-stop regions 13. Note that non-water-stop ranges 13B are formed on both sides in the width direction of the rectangular water-stop range 13A constituted by the plurality of water-stop regions 13 on the inner surface 11A of the rubber patch 11.

[0031] Therefore, when the pinhole 2 comes to a position corresponding to the water-stop range 13A, the rubber patch 11 can surely stop the fluid leaking from the pinhole 2, but when the pinhole 2 comes to a position corresponding to the non-water-stop range 13B, it becomes difficult for the rubber patch 11 to stop the fluid leaking from the pinhole 2.

[0032] In the present embodiment, the plurality of water-stop regions 13 each have a square shape, and the water-stop range 13A composed of the plurality of water-stop regions 13 has a rectangular shape.

[0033] And the width of the water-stop range 13A is L2 (see Fig. 3).

[0034] In the present embodiment, the width L1 of the rectangular rubber patch 11 is, for example 20mm and the width L2 of the rectangular water-stop range 13A is, for example 14mm as shown (see Figs. 2 to 3). Also, the length L of the rectangular rubber patch 11 is, for example 60mm as shown (see Fig. 2).

[0035] In the present embodiment, a spiral seam weld portion 1B extending spirally is formed on the pipe 1, and pinholes 2 are scattered along this spiral seam weld portion 1B. For this reason, the rectangular rubber patch 11 is arranged spirally along the outer surface of the pipe 1 along this seam weld portion 1B. That is, the longitudinal direction of the rubber patch 11 follows the direction of the seam weld portion 1B.

[0036] And the four bands 20 press the spirally arranged rubber patch 11 from the outside and are wound around the pipe 1 in a circumferential direction.

[0037] For this reason, the winding direction of the four bands 20 is inclined with respect to the longitudinal direction of the rubber patch 11. In the present embodiment, substantially the entire area along the longitudinal direction and the circumferential direction of the pipe 1 of the rubber patch 11 attached to the outside of the pipe 1 is covered by the four bands 20.

[0038] For this reason, the rubber patch 11 arranged spirally with respect to the pipe 1 can be surely covered by the four bands 20 over substantially the entire area along the longitudinal direction and the circumferential direction of the pipe 1 and fixed to the pipe 1.

[0039] Next, the four bands 20 will be described. Each band 20 is made of stainless steel, and each band 20 is tightened by a fastener 30.

[0040] In the present embodiment, as shown in FIGS. 1A, 1B, and 2, each stainless steel band 20 has one end 20a and the other end 20b that are separated from each other. And a fastener 30 is fixed to one end 20a of the band 20 (see FIG. 6A).

[0041] The fastener 30 has a fixture 32 fixed to one end 20a of the band 20, and a fastener body 31 attached to the fixture 32. A worm gear 33 is rotatably disposed within the fastener body 31.

[0042] Also, a hexagonal bolt 34 is attached to one end of the worm gear 33 disposed within the fastener body 31. By rotating the hexagonal bolt 34 using a tool (not shown), the worm gear 33 within the fastener body 31 rotates.

[0043] On the other hand, a plurality of elongated openings 21 extending in the width direction of the band 20 are continuously provided in the longitudinal direction of the band 20 at the other end 20b of the band 20 (see FIG. 6B).

[0044] Insert the other end 20b of the band 20 into the fastener body 31 and bring the other end 20b into contact with the worm gear 33 within the fastener body 31. Then rotate the hexagonal bolt 34 attached to the worm gear 33 using a tool. As a result, the worm gear 33 rotates and the worm gear 33 engages with the opening 21 of the other end 20b. In this way, by rotating the worm gear 33, the other end 20b of the band 20 can be advanced rightward (in the direction of the arrow in FIG. 6A) in FIG. 6A, and the inner diameter of the band 20 can be reduced.

[0045] As a result, the fastener 30 can press the band 20 against the pipe 1.

[0046] Next, the operation of the present embodiment having such a configuration will be described with reference to FIGS. 2, 7A to 8C.

[0047] First, as shown in FIGS. 2, 7A, and 7B, find the fluid leakage location from pipe 1 and identify a plurality of pinholes 2 from the fluid leakage location.

[0048] Next, cover the vicinity of the plurality of pinholes 2 in pipe 1 from the outside with a rubber patch and temporarily fix the rubber patch 11 to the outside of pipe 1.

[0049] In this case, the pinholes 2 are scattered along the spiral seam weld 1B extending in a spiral shape in pipe 1. For this reason, the rectangular rubber patch 11 is arranged along the seam weld 1B on the outer surface of pipe 1.

[0050] Next, as shown in FIGS. 8A to 8C, hold down the rubber patch 11 from the outside using four bands 20 and wrap the four bands 20 around the outside of pipe 1.

[0051] In this case, the four bands 20 hold down the rubber patch 11 arranged in a spiral shape from the outside and are wound circumferentially around the outer circumference of pipe 1. For this reason, the winding direction of the four bands 20 is inclined with respect to the longitudinal direction of the rubber patch 11, but in the present embodiment, substantially the entire region of the rubber patch 11 along the longitudinal direction and the circumferential direction of pipe 1 is covered by the four bands 20.

[0052] Therefore, the rubber patch 11 arranged inclined with respect to pipe 1 can be surely covered by the four bands 20 over substantially the entire region along the longitudinal direction and the circumferential direction of pipe 1.

[0053] Thereafter, insert the other end 20b of the band 20 into the fastener 30 provided at one end 20a of each band 20 and rotate the hexagon bolt 34 using a tool.

[0054] At this time, the worm gear 33 of the fastener 30 engages with the opening 21 provided at the other end 20b of the band 20. By rotating the worm gear 33 in this way, the other end 20b of the band 20 is advanced rightward (in the direction of the arrow in FIG. 6A) in FIG. 6A, thereby reducing the inner diameter of the band 20 and tightening the band 20 with the fastener 30.

[0055] During this period, the fastener 30 is tightened until the fluid from each pinhole 2 stops leaking outward.

[0056] As described above, according to the present embodiment, a plurality of pinholes 2 scattered on the spiral seam weld 1B of the pipe 1 are specified, the plurality of pinholes 2 are covered with a rectangular rubber patch 11, and the rubber patch 11 is pressed by a band 20. In this way, fluid leakage from the pipe 1 can be prevented with a simple and easy configuration. Further, on the inner surface 11A of the rubber patch 11, linear water-stop protrusions 12 formed in a lattice shape and extending linearly are provided, and a plurality of square water-stop regions 13 are formed by the water-stop protrusions 12. Therefore, by simply arranging the rubber patch 11 on the outer surface of the pipe 1 so that each pinhole 2 corresponds to the water-stop range 13A composed of the plurality of water-stop regions 13, each pinhole 2 will be covered by one of the water-stop regions 13. As a result, the fluid from each pinhole 2 can be reliably confined within the narrow range of the water-stop region 13 and prevented from leaking outside the rubber patch 11.

[0057] Furthermore, even if fluid leaks from the water-stop region 13 corresponding to a certain pinhole 2, the fluid leaked from the water-stop region 13 corresponding to the pinhole 2 will be confined within the water-stop region 13 adjacent to the water-stop region 13, so that no fluid will leak outside the rubber patch 11.

[0058] In addition, in the above embodiment, an example was shown in which the fastener 30 was fixed to one end portion 20a of the band 20, the other end portion 20b of the band 20 was inserted into the fastener 30, and the band 20 was tightened by the fastener 30. However, the present invention is not limited to this, and the band 20 may be divided at two or more locations, fasteners may be provided at each divided portion, and the band 20 may be tightened by each fastener.

[0059] Further, an example was shown in which the lattice-shaped water-stop protrusions 12 were provided on the inner surface 11A of the rubber patch 11, and a plurality of water-stop regions 13 were formed by the water-stop protrusions 12. However, the number of the water-stop regions 13 is not particularly limited. Further, the length L, the width L1 of the rubber patch 11, and the width L2 of the water-stop range 13A are not particularly limited either.

[0060] Furthermore, a plurality of pinholes 2 are scattered along the spiral seam weld portion 1B extending in the pipe 1. For this reason, the rubber patch 11 covering the plurality of pinholes 2 has a rectangular shape, and the longitudinal direction of the rubber patch 11 is directed toward the direction of the seam weld portion 1B.

[0061] In the present embodiment, since the four bands 20 are wound around the outer periphery of the pipe 1 along the circumferential direction, the winding directions of the four bands 20 are inclined with respect to the longitudinal direction of the rubber patch 11. However, substantially the entire region of the rubber patch 11 along the longitudinal direction and the circumferential direction of the pipe 1 is covered by the four bands 20. For this reason, the rubber patch 11 disposed inclined with respect to the pipe 1 can be surely covered and fixed by the four bands 20 over substantially the entire region along the longitudinal direction and the circumferential direction of the pipe 1.

Explanation of Reference Numerals

[0062] 1 Pipe 2 Pinhole 10 Water-stop band device 11 Rubber patch 12 Water-stop protrusion 13 Water-stop region 13A Water-stop range 13B Non-water-stop range 20 Band 20a One end portion 20b Other end 21 Opening 30 Fastener 31 Fastener body 32 Mounting tool 33 Worm gear 34 Hexagon bolt

Claims

1. In a water stop band device for stopping a fluid leaking from a plurality of pinholes scattered in a pipe, a rectangular rubber patch that covers the plurality of pinholes from the outside of the pipe; a plurality of bands that press the rubber patch from the outside and are wound around the pipe; and a fastener for tightening each band, wherein each band is arranged along the circumferential direction on the outer surface of the pipe, and a water stop protrusion for forming a water stop region is formed on the inner surface of the rubber patch. A water stop band device.

2. The plurality of pinholes are scattered in a welded portion linearly extending in the pipe. The water stop band device according to claim 1.

3. The water stop protrusion is formed in a lattice pattern on the inner surface of the rubber patch, and the water stop region is formed in a rectangular shape by the lattice-shaped water stop protrusion. The water stop band device according to claim 1.

4. The welded portion is formed in a spiral shape on the pipe. The water stop band device according to claim 2.

5. The welded portion is formed in a circumferential shape on the pipe. The water stop band device according to claim 2.

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