Pinhole repair device

Abstract

A pinhole repair device will be installed only in and around pinholes in the piping. [Solution] A rubber patch 11 is provided on the outside of the pipe 1 to cover the pinhole 2. The rubber patch 11 is fixed onto the pipe 1 using a magnetic sheet 20.

Description

Technical Field

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[0001] The present disclosure relates to a pinhole repair device for stopping fluid leaking from a pinhole formed in a pipe through which fluid flows.

Background Art

[0002] Conventionally, a pinhole repair device has been used to stop fluid leaking from a pinhole formed in a pipe through which fluid such as steam flows.

[0003] Such a pinhole repair device has a structure for stopping water leakage not only from pinholes but also from the entire pipe, and the water-stopping portion extends over the entire circumference of the pipe. Therefore, the structure of the entire repair device becomes large. Also, as the pipe, not only a round pipe but also a polygonal pipe including a square is conceivable. In particular, when the pipe has a large diameter, it is desired to develop a pinhole repair device installed only around the pinhole.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present disclosure has been made in consideration of such points, and an object thereof is to provide a pinhole repair device that can be installed limited to a pinhole formed in a pipe and its vicinity and can prevent the outflow of fluid leaking from the pinhole.

Means for Solving the Problems

[0006] This disclosure relates to a pinhole repair device for stopping fluid leakage from a pinhole formed in a pipe made of a magnetic material, the device comprising a rubber patch that covers the pinhole from the outside of the pipe, and a magnetic sheet that fixes the rubber patch to the pipe and is attracted to the pipe.

[0007] This disclosure relates to a pinhole repair device in which the magnet sheet has a plurality of divided magnet sheets, a retaining plate is provided on the rubber patch, and the retaining plate is fixed to the piping by the plurality of divided magnet sheets.

[0008] This disclosure relates to a pinhole repair device in which the retaining plate includes a retaining plate portion that is elongated in plan view, and both ends of the retaining plate portion are fixed to the piping by the divided magnet sheet.

[0009] This disclosure relates to a pinhole repair device in which the retaining plate includes a plurality of retaining plate portions, each having an elongated shape in plan view, and both ends of each retaining plate portion are fixed to the piping by the divided magnet sheet.

[0010] This disclosure relates to a pinhole repair device in which the plurality of retaining plate portions are stacked on top of each other.

[0011] This disclosure relates to a pinhole repair device in which the plurality of retaining plate portions are spaced apart from each other.

[0012] This disclosure relates to a pinhole repair device for stopping fluid leakage from a pinhole formed in a pipe made of a magnetic material, wherein the device comprises a rubber patch that covers the pinhole from the outside of the pipe, and the rubber patch comprises a rubber material and magnetic powder mixed into the rubber material. [Effects of the Invention]

[0013] As described above, according to this disclosure, the pinhole repair device can be installed only in and near pinholes formed in piping, and the overall structure can be made compact.

Brief Description of the Drawings

[0014] [Figure 1] Figure 1 is a plan view showing the first embodiment of the present disclosure. [Figure 2] Figure 2 is a sectional view taken along line 2-2 of Figure 1. [Figure 3] Figure 3 is a view of the rubber packing seen from the inner surface side. [Figure 4] Figure 4 is a side sectional view showing the rubber packing provided on the pinhole of the pipe. [Figure 5] Figure 5 is a sectional view showing the pipe provided with the pinhole repair device. [Figure 6] Figure 6 is a plan view showing the second embodiment of the present disclosure. [Figure 7] Figure 7 is a sectional view taken along line 7-7 of Figure 6. [Figure 8] Figure 8 is a sectional view taken along line 8-8 of Figure 6. [Figure 9] Figure 9 is a plan view showing the third embodiment of the present disclosure. [Figure 10] Figure 10 is a sectional view taken along line 10-10 of Figure 9. [Figure 11] Figure 11 is a plan view showing the fifth embodiment of the present disclosure. [[ID=​​​​​​​​​​​​​​​​​​​​​​​​​A first embodiment of the pinhole repair device according to this disclosure will be described below with reference to the drawings.

[0016] The pinhole repair device 10 is outlined in Figures 1 to 5.

[0017] The pinhole repair device 10 stops fluid leakage from a pinhole 2 formed in a pipe 1 through which a fluid, such as steam, flows. In this embodiment, as shown in Figure 5, the pipe 1 is a polygonal pipe, for example, a square pipe, and a large pipe with a side length L of about 500 to 1000 mm is used. The pipe 1 is made of a magnetic material, for example, a steel pipe, and can attract the magnet sheet 20 described later. Note that the pipe 1 only needs to be made of a magnetic material and does not necessarily have to be a polygonal pipe; it may also be a round pipe.

[0018] Such a pinhole repair device 10 includes a rubber patch 11 that covers the pinhole 2 in the pipe 1 from the outside of the pipe 1, and a magnetic sheet 20 that fixes the rubber patch 11 to the pipe 1 and is attracted to the pipe 1.

[0019] Of these, the rubber patch 11 covers the pinhole 2 from the outside of the pipe 1 and consists of a rubber patch mainly made of ethylene propylene diene rubber (EPDM), and has a rectangular shape in plan view. This EPDM rubber has excellent heat resistance, chemical resistance, durability, and weather resistance. However, the rubber patch 11 does not necessarily have to be made of EPDM rubber and may be made of rubber made of other materials.

[0020] Specifically, as shown in Figures 3 and 4, the rubber patch 11 has a square shape in plan view and has an inner surface 11A and an outer surface 11B. Linear water-sealing protrusions 12 are formed on the inner surface 11A of the rubber patch 11, and these water-sealing protrusions 12 are arranged in a grid pattern. Inside the grid-shaped water-sealing protrusions 12, a recessed water-sealing region 13 is formed, surrounded by the water-sealing protrusions 12 (see Figure 3).

[0021] In other words, the fluid leaking from the pipe 1 through the pinhole 2 is contained within the watertight area 13 surrounded by the watertight projections 12 of the rubber patch 11, preventing it from leaking outwards from the rubber patch 11.

[0022] In this embodiment, the rubber patch 11 is square in shape, and one side of it has a length of L1.

[0023] Furthermore, a total of nine water-stopping regions 13 are formed on the inner surface of the rubber patch 11, surrounded by water-stopping protrusions 12. These nine water-stopping regions 13 have the function of stopping the fluid and preventing it from leaking out.

[0024] In this embodiment, nine water-stopping regions 13 form a square-shaped water-stopping area 13A that stops the fluid.

[0025] Therefore, when the pinhole 2 reaches a position corresponding to the above-mentioned watertight range 13A, the rubber patch 11 can reliably stop the fluid leaking from the pinhole 2.

[0026] In this embodiment, each of the nine water-stopping areas 13 is square-shaped, and the water-stopping area 13A consisting of the nine water-stopping areas 13 is also square-shaped.

[0027] In this embodiment, one side L1 of the square-shaped rubber patch 11 is, for example, 20 mm.

[0028] As shown in Figures 1 and 2, the magnetic sheet 20 that secures the rubber patch 11 to the pipe 1 has a strong magnetic attraction to the pipe 1. The magnetic sheet 20 has a square-shaped central portion 21 that covers the rubber patch 11, and four square-shaped peripheral portions 22 that extend outward from each side of the central portion 21 and are connected to the central portion. The central portion 21 holds down the rubber patch 11, and the four peripheral portions 22 connected to the central portion 21 are attracted to the pipe 1. In this way, the rubber patch 11 can be secured to the pipe 1.

[0029] Next, the operation of this embodiment, which has the above configuration, will be explained with reference to Figures 1 to 5.

[0030] First, as shown in Figures 3 and 4, locate the fluid leak point from pipe 1, and then identify pinhole 2 from the fluid leak point.

[0031] Next, the area near pinhole 2 in pipe 1 is covered from the outside with a rubber patch, and the rubber patch 11 is temporarily fixed to the outside of pipe 1.

[0032] Next, as shown in Figures 1 and 2, the rubber patch 11 is pressed from the outside using the magnetic sheet 20, and the magnetic sheet 20 is attached to the outside of the pipe 1.

[0033] As described above, according to this embodiment, a pinhole 2 formed in the pipe 1 is identified and covered with a rubber patch 11. Next, the rubber patch 11 is pressed down with a magnetic sheet 20, and the magnetic sheet 20 is attracted to the outside of the pipe 1, making it easy and simple to prevent fluid leakage from the pipe 1. Furthermore, the inner surface 11A of the rubber patch 11 is provided with linearly extending water-stopping protrusions 12 formed in a grid pattern, and nine square-shaped water-stopping regions 13 are formed by the water-stopping protrusions 12. Therefore, by simply positioning the rubber patch 11 on the outer surface of the pipe 1 so that the pinhole 2 corresponds to the water-stopping range 13A consisting of these nine water-stopping regions 13, the pinhole 2 will be covered by one of the water-stopping regions 13. In this way, the fluid from the pinhole 2 can be contained within the narrow range of the water-stopping region 13 and reliably prevented from leaking out to the outside of the rubber patch 11.

[0034] Furthermore, even if fluid leaks from the water-sealing area 13 corresponding to the pinhole 2, the fluid leaked from the water-sealing area 13 corresponding to the pinhole 2 is contained within the water-sealing area 13 adjacent to that water-sealing area 13, so the fluid does not leak out of the rubber patch 11.

[0035] In the above embodiment, a grid-like water-sealing projection 12 is provided on the inner surface 11A of the rubber patch 11, and an example is shown in which nine water-sealing regions 13 are formed by these water-sealing projections 12. However, the number of water-sealing regions 13 is not limited to this.

[0036] <Second Embodiment> Next, a second embodiment of the pinhole repair device according to this disclosure will be described with reference to Figures 6 to 8.

[0037] In the second embodiment shown in Figures 6 to 8, the pinhole repair device 10 includes a rubber patch 11 that covers the pinhole 2 of the pipe 1 from the outside of the pipe 1, and a magnetic sheet 20 that fixes the rubber patch 11 to the pipe 1 and is attracted to the pipe 1. In the second embodiment shown in Figures 6 to 8, the configuration of the rubber patch 11 that covers the pinhole 2 from the outside of the pipe 1 is substantially the same as in the first embodiment shown in Figures 1 to 5.

[0038] Furthermore, in the second embodiment shown in Figures 6 to 8, the magnet sheet 20 has the same attraction force as in the first embodiment and consists of multiple, for example, a pair of divided magnet sheets 20a, 20b. A steel retaining plate 30 is also placed on the rubber patch 11. The retaining plate 30 consists of a single planar rectangular retaining plate portion 30A.

[0039] Then, the retaining plate portion 30A of the retaining plate 30 is attracted to the pipe 1 by the divided magnetic sheets 20a and 20b.

[0040] Specifically, both ends 31 and 32 of the retaining plate portion 30A of the retaining plate 30 are fixed to the pipe 1 by divided magnetic sheets 20a and 20b, respectively, which are attracted to the pipe 1. In this way, both ends 31 and 32 of the retaining plate portion 30A are fixed to the pipe 1 by the divided magnetic sheets 20a and 20b that are attracted to the pipe 1. The retaining plate portion 30A fixed to the pipe 1 can then press and fix the rubber patch 11 that covers the pinhole 2 of the pipe 1 from the outside.

[0041] In this embodiment, the rubber patch 11 that covers the pinhole 2 of the pipe 1 from the outside can be held down by the retaining plate portion 30A. The ends 31 and 32 of the retaining plate portion 30A can then be pressed and fixed from the outside by the divided magnetic sheets 20a and 20b. As a result, the rubber patch 11 can be pressed down with strong force on the pipe 1 by the retaining plate portion 30A, whose ends 31 and 32 are fixed on the pipe 1, using the principle of leverage. This allows the rubber patch 11 to be fixed more firmly on the pipe 1.

[0042] <Third Embodiment> Next, a third embodiment of the pinhole repair device according to this disclosure will be described with reference to Figures 9 and 10.

[0043] In the third embodiment shown in Figures 9 and 10, the pinhole repair device 10 includes a rubber patch 11 that covers the pinhole 2 of the pipe 1 from the outside of the pipe 1, and a magnetic sheet 20 that fixes the rubber patch 11 to the pipe 1 and is attracted to the pipe 1. In the third embodiment shown in Figures 9 and 10, the configuration of the rubber patch 11 that covers the pinhole 2 from the outside of the pipe 1 is substantially the same as in the first embodiment shown in Figures 1 to 5.

[0044] Furthermore, in the third embodiment shown in Figures 9 and 10, the magnet sheet 20 has the same attraction force as in the first embodiment and consists of multiple, for example, four divided magnet sheets 20a, 20b, 20c, and 20d.

[0045] Furthermore, a steel retaining plate 30 is placed on the rubber patch 11. The retaining plate 30 consists of a pair of rectangular retaining plate portions 30A and 30B in plan view, and the rectangular retaining plate portions 30A and 30B are arranged perpendicular to each other in plan view and overlap each other at the rubber patch 11.

[0046] The lower retaining plate portion 30A is fixed to the pipe 1 by divided magnetic sheets 20a and 20b which are attracted to the pipe 1, and the upper retaining plate portion 30B is fixed to the pipe 1 by divided magnetic sheets 20c and 20d which are attracted to the pipe 1.

[0047] Specifically, the lower holding plate portion 30A has both ends 31 and 32 fixed to the pipe 1 by divided magnetic sheets 20a and 20b, which are attracted to the pipe 1, respectively, and the upper holding plate portion 30B has both ends 33 and 34 fixed to the pipe 1 by divided magnetic sheets 20c and 20d, which are attracted to the pipe 1, respectively. The holding plate portions 30A and 30B, which are fixed to the pipe 1 and overlapped at the rubber patch 11, can then press and secure the pinhole 2 of the pipe 1 from the outside.

[0048] In this embodiment, the rubber patch 11 that covers the pinhole 2 of the pipe 1 from the outside can be held down by a pair of retaining plate portions 30A and 30B. The ends 31 and 32 of the retaining plate portion 30A can be pressed and fixed from the outside by the divided magnetic sheets 20a and 20b. As a result, the rubber patch 11 can be pressed down with strong force on the pipe 1 using the "lever principle" by the retaining plate portion 30A, whose ends 31 and 32 are fixed on the pipe 1, and the retaining plate portion 30B, whose ends 33 and 33 are fixed on the pipe 1. This allows the rubber patch 11 to be fixed more firmly on the pipe 1. Furthermore, the retaining plate portions 30A and 30B overlap each other at the rubber patch 11, and are arranged in a cross shape, perpendicular to each other in a plan view. As a result, the rubber patch 11 can be pressed down uniformly on the pipe 1 by the pair of retaining plate portions 30A and 30B formed in a cross shape.

[0049] <Fourth Embodiment> Next, a fourth embodiment of the pinhole repair device according to this disclosure will be described with reference to Figures 3 and 4.

[0050] As shown in Figures 3 and 4, the pinhole repair device 10 includes a square-shaped rubber patch 11 in plan view that covers the pinhole in the pipe 1 from the outside of the pipe 1. In this embodiment, the external configuration of the rubber patch 11 is the same as in the first embodiment, but the material is different from that of the first embodiment.

[0051] In other words, in the first embodiment, the rubber patch consists of ethylene propylene diene rubber (EPDM) as the main material, whereas in the fourth embodiment, the rubber patch 11 consists of rubber containing ethylene propylene diene rubber or tetrafluoropropylene as the main material and magnetic powder mixed into this rubber.

[0052] In this embodiment, the rubber patch 11 has both the function of covering the pinhole 2 formed in the pipe 1 from the outside and the function of being adsorbed to and fixed to the pipe 1.

[0053] <Fifth Embodiment> Next, a fifth embodiment of the pinhole repair device according to this disclosure will be described with reference to Figures 11 to 14.

[0054] As shown in Figures 11 and 12, the pinhole repair device 10 stops fluid from leaking out of multiple pinholes 2 formed in a pipe 1 through which a fluid, such as steam, flows.

[0055] Such a pinhole repair device 10 includes a rubber patch 11 that covers a plurality of pinholes 2 formed in the pipe 1 from the outside of the pipe 1, and a magnetic sheet 20 that fixes the rubber patch 11 to the pipe 1 and is attracted to the pipe 1.

[0056] Of these, the rubber patch 11 covers the pinhole 2 from the outside of the pipe 1 and is made of a rubber patch mainly composed of ethylene propylene diene rubber (EPDM), and has a rectangular shape when viewed from above. This EPDM rubber has excellent heat resistance, chemical resistance, durability, and weather resistance.

[0057] Specifically, as shown in Figures 13 and 14, the rubber patch 11 has a rectangular shape in plan view and has an inner surface 11A and an outer surface 11B. Linear water-sealing protrusions 12 are formed on the inner surface 11A of the rubber patch 11, and these water-sealing protrusions 12 are arranged in a grid pattern. Inside the grid-shaped water-sealing protrusions 12, a recessed water-sealing region 13 is formed, surrounded by the water-sealing protrusions 12 (see Figure 13).

[0058] In other words, the fluid leaking from the pipe 1 through the pinhole 2 is contained within the watertight area 13 surrounded by the watertight projections 12 of the rubber patch 11, preventing it from leaking outwards from the rubber patch 11.

[0059] In this embodiment, the rubber patch 11 is rectangular in shape, with a length of L2 and a width of L3 (see Figure 13).

[0060] Furthermore, multiple water-stopping regions 13 surrounded by water-stopping protrusions 12 are formed on the inner surface of the rubber patch 11, and these multiple water-stopping regions 13 have the function of stopping the fluid and preventing the fluid from leaking out.

[0061] In this embodiment, a rectangular water-stopping area 13A is formed by multiple water-stopping regions 13 to stop the fluid.

[0062] Therefore, when the pinhole 2 reaches a position corresponding to the above-mentioned watertight range 13A, the rubber patch 11 can reliably stop the fluid leaking from the pinhole 2.

[0063] In this embodiment, each of the multiple water-stopping areas 13 is square-shaped, and the water-stopping area 13A, which consists of the multiple water-stopping areas 13, is rectangular-shaped.

[0064] In this embodiment, the width L3 of the rectangular rubber patch 11 is, for example, 20 mm, and the length L2 of the rectangular rubber patch 11 is, for example, 60 mm (see Figure 13).

[0065] As shown in Figures 11 and 12, the magnetic sheet 20 that secures the rubber patch 11 to the pipe 1 has a strong magnetic force to the pipe 1. The magnetic sheet 20 has a rectangular central portion 21 that covers the rubber patch 11, and four rectangular peripheral portions 22 that extend outward from each side of the central portion 21 and are connected to the central portion. The central portion 21 holds the rubber patch 11 in place, while the four peripheral portions 22 connected to the central portion 21 are attracted to the pipe 1. In this way, the rubber patch 11 can be secured to the pipe 1.

[0066] Next, the operation of this embodiment, which has the above configuration, will be explained with reference to Figures 11 to 14.

[0067] First, as shown in Figures 11 to 14, the location of the fluid leak from pipe 1 is found, and multiple pinholes 2 are identified from the location of the fluid leak.

[0068] Next, the vicinity of several pinholes 2 in pipe 1 is covered from the outside with rubber patches, and the rubber patches 11 are temporarily fixed to the outside of pipe 1.

[0069] Next, as shown in Figures 11 and 12, the rubber patch 11 is pressed from the outside using the magnetic sheet 20, and the magnetic sheet 20 is attached to the outside of the pipe 1.

[0070] As described above, according to this embodiment, multiple pinholes 2 scattered in the pipe 1 are identified, these multiple pinholes 2 are covered with rectangular rubber patches 11, and the rubber patches 11 are held in place with a magnetic sheet. By simply attaching the magnetic sheet 20 to the outside of the pipe 1 in this way, fluid leakage from the pipe 1 can be prevented with an easy and simple configuration. Furthermore, the inner surface 11A of the rubber patch 11 is provided with linearly extending water-stopping protrusions 12 formed in a grid pattern, and multiple square-shaped water-stopping regions 13 are formed by the water-stopping 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 a water-stopping range 13A consisting of these multiple water-stopping regions 13, each pinhole 2 will be covered by one of the water-stopping regions 13. In this way, fluid from each pinhole 2 can be contained within the narrow range of the water-stopping region 13 and is reliably prevented from leaking out to the outside of the rubber patch 11.

[0071] Furthermore, even if fluid leaks from a water-sealing area 13 corresponding to a pinhole 2, the fluid leaked from that water-sealing area 13 is contained within the water-sealing area 13 adjacent to that water-sealing area 13, so the fluid does not leak out of the rubber patch 11.

[0072] In the example shown, a grid-like structure of water-sealing protrusions 12 is provided on the inner surface 11A of the rubber patch 11, and these protrusions 12 form multiple water-sealing regions 13. However, the number of water-sealing regions 13 is not particularly limited. Furthermore, the length L2 and width L3 of the rubber patch 11 are not particularly limited.

[0073] <Sixth Embodiment> Next, a sixth embodiment of the pinhole repair device according to this disclosure will be described with reference to Figures 15 to 17.

[0074] In the sixth embodiment shown in Figures 15 to 17, the pinhole repair device 10 includes a rubber patch 11 that covers the pinhole 2 of the pipe 1 from the outside of the pipe 1, and a magnetic sheet 20 that fixes the rubber patch 11 to the pipe 1 and is attracted to the pipe 1. In the sixth embodiment shown in Figures 15 to 17, the configuration of the rubber patch 11 that covers the pinhole 2 from the outside of the pipe 1 is substantially the same as that of the fifth embodiment shown in Figures 11 to 14.

[0075] Furthermore, in the sixth embodiment shown in Figures 15 to 17, the magnet sheet 20 has the same attraction force as in the fifth embodiment and consists of multiple, for example, two divided magnet sheets 20a and 20b.

[0076] Furthermore, a steel retaining plate 30 is placed on the rubber patch 11. The retaining plate 30 consists of a pair of rectangular retaining plate portions 30A and 30B in a plan view, and the rectangular retaining plate portions 30A and 30B are arranged on one side and the other side of the rectangular rubber patch 11, spaced apart from each other and parallel to each other.

[0077] Then, one retaining plate portion 30A and the other retaining plate portion 30B are attracted to the pipe 1 by the divided magnetic sheets 20a and 20b.

[0078] Specifically, both ends 31 and 32 of one retaining plate portion 30A are fixed to the pipe 1 by divided magnetic sheets 20a and 20b, respectively, which are attracted to the pipe 1, and both ends 33 and 34 of the other retaining plate portion 30B are fixed to the pipe 1 by divided magnetic sheets 20a and 20b, respectively, which are attracted to the pipe 1. Then, using the pair of retaining plate portions 30A and 30B fixed to the pipe 1, the rubber patch 11 can be pressed against the pinhole 2 of the pipe 1 from the outside, thereby fixing the rubber patch 11.

[0079] In this embodiment, a rubber patch 11 that covers the pinhole 2 of the pipe 1 from the outside is held down by a pair of retaining plate portions 30A and 30B. The ends 31 and 32 of the retaining plate portion 30A and the ends 33 and 34 of the retaining plate portion 30B can be pressed and fixed from the outside by the divided magnetic sheets 20a and 20b. As a result, the rubber patch 11 on the pipe 1 can be pressed down with strong force using the "lever principle" by the retaining plate portion 30A, whose ends 31 and 32 are fixed on the pipe 1, and the retaining plate portion 30B, whose ends 33 and 33 are fixed on the pipe 1. This allows the rubber patch 11 to be fixed more firmly on the pipe 1. Furthermore, the retaining plate portions 30A and 30B are provided spaced apart from each other on one side and the other side of the rectangular rubber patch 11, and both retaining plate portions 30A and 30B are provided perpendicular to the rectangular rubber patch 11 in a plan view and parallel to each other. Therefore, the rubber patch 11 can be uniformly pressed down on the pipe 1 by the retaining plate portion 30A and retaining plate portion 30B, which are provided perpendicular to the rectangular rubber patch and parallel to each other.

[0080] <Seventh Embodiment> Next, a seventh embodiment of the pinhole repair device according to this disclosure will be described with reference to Figures 13 and 14.

[0081] As shown in Figures 13 and 14, the pinhole repair device 10 includes a rectangular rubber patch 11 that covers the pinhole in the pipe 1 from the outside. In this embodiment, the external appearance of the rubber patch 11 is the same as in the fifth embodiment, but the material is different from that of the fifth embodiment.

[0082] In other words, in the fifth embodiment, the patch consists of a rubber patch containing ethylene propylene diene rubber (EPDM) as the main material, whereas in the seventh embodiment, the rubber patch 11 contains rubber containing ethylene propylene diene rubber or tetrafluoropropylene as the main material and magnetic powder mixed into this rubber.

[0083] In this embodiment, the rubber patch 11 has both the function of covering the pinhole 2 formed in the pipe 1 from the outside and the function of being adsorbed to and fixed to the pipe 1. [Explanation of symbols]

[0084] 1 Piping 2 pinholes 10 Pinhole repair device 11 Rubber patch 11A Inner surface 11B External surface 12 Water stop protrusion 13 Water stop area 13A Water-stopping range 20 Magnetic Sheets 20a Divided Magnetic Sheet 20b Divided Magnetic Sheet 20cm Divided Magnetic Sheet 20d Divided Magnetic Sheet 21 Central part 22 Peripheral area 30 Holding plate 30A retaining plate part 30B Holding plate part 31 End 32 End 33 End 34 End

Claims

1. In a pinhole repair device that stops fluid leakage from pinholes formed in a pipe made of magnetic material, A rubber patch covering the pinhole from the outside of the aforementioned piping, A pinhole repair device comprising a rubber patch fixed to the pipe and a magnetic sheet that is attracted to the pipe.

2. The aforementioned magnet sheet has a plurality of divided magnet sheets, The pinhole repair device according to claim 1, wherein a retaining plate is provided on the rubber patch, and the retaining plate is fixed to the piping by the plurality of divided magnet sheets.

3. The pinhole repair device according to claim 2, wherein the retaining plate includes a retaining plate portion that is elongated in plan view, and both ends of the retaining plate portion are fixed to the piping by the divided magnet sheet.

4. The aforementioned retaining plate includes a plurality of retaining plate portions, each having an elongated shape in plan view. The pinhole repair device according to claim 2, wherein both ends of each retaining plate portion are fixed to the piping by the divided magnetic sheet.

5. The pinhole repair device according to claim 4, wherein the plurality of retaining plate portions are stacked on top of each other.

6. The pinhole repair device according to claim 4, wherein the plurality of retaining plate portions are spaced apart from each other.

7. In a pinhole repair device that stops fluid leakage from pinholes formed in a pipe made of magnetic material, The piping is provided with a rubber patch that covers the pinhole from the outside, The aforementioned rubber patch comprises a rubber material and magnetic powder mixed into the rubber material, and is a pinhole repair device.

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