JP7420599B2 - Leak repair jig, leak repair method - Google Patents

Description

The present invention relates to a leak repair jig for repairing fluid leaks caused by internal corrosion, external corrosion, etc. in piping, etc., and a leak repair method using the same.

For example, in factory equipment, piping through which fluid flows is used. Pinholes and the like may occur in such piping due to aging (corrosion), and in this case, internal fluid leaks. To prevent such fluid leakage, it is necessary to stop the internal fluid and replace the piping. However, since such a measure requires stopping production, it is difficult to deal with it when there is a problem with production or the like and it is difficult to stop the apparatus. For this reason, there is a need for a method for emergency repair of pipe leakage in a shorter time.

Examples of such leakage repair methods include, for example, a leakage repair device that uses an FRP sheet, a pressing plate that presses the FRP sheet against the piping, a curing device that hardens the FRP sheet, and a fixing device such as a magnet that fixes the device to the piping. has been proposed (Patent Document 1).

Furthermore, an emergency blowout gas shutoff device has been proposed that includes a sheet-like magnet, an adhesive member disposed on the attraction surface of the magnet, and a magnetic force suppressing member that covers the adhesive member and is removable (Patent Document 2).

JP2010-84848A Japanese Patent Application Publication No. 2018-146037

However, the outer surface of the piping usually has fine irregularities and local scratches, and it is difficult to reliably fill in these irregularities and shut off fluid.

For example, in the method using an FRP sheet as in Patent Document 1, it is difficult to reliably fill the gaps between the above-mentioned irregularities and scratches. Further, although a hardened FRP sheet is used, since the sheet does not have sufficient flexibility after hardening, there is a risk that fluid may flow through the gap between the sheet and the piping due to gas pressure. In particular, since some shrinkage occurs when the FRP sheet hardens, even if the surface of the piping can be reliably covered before hardening, there is a risk that gaps will occur during hardening.

Furthermore, in Patent Document 2, an adhesive member is used and is pressed against the piping by a magnet, but a regular adhesive member usually has a limit in its deformability, so it cannot follow gentle unevenness. However, it is difficult to completely fill localized wounds. Therefore, if there is a slightly deep scratch, fluid may leak through the scratch.

In this way, for example, when a leak occurs in a factory piping system, etc., it can reliably track irregularities of various sizes on the surface of the piping, etc., and perform emergency repairs immediately to minimize the impact on production due to equipment stoppages. At the same time, there is a need for a highly reliable leakage repair jig that does not easily cause leakage over time.

The present invention has been made in view of such problems, and an object of the present invention is to provide a leak repair jig that can reliably repair leaks in piping, etc., in a simple manner, and a leak repair method using the same. With the goal.

In order to achieve the above-mentioned object, a first invention is a leak repair jig for repairing a fluid leakage point, which comprises a non-hardening clay that is brought into close contact with the leakage point, and a fixing of the clay to the leakage point. and a magnet disposed on a surface opposite to the surface of the clay that is in close contact with the leakage location, the clay containing a magnetic material and adhering to the leakage location in a state where it is attracted to the magnet. This is a leak repair jig characterized by the following.

It is desirable to include a clay flow regulating section disposed so as to surround the outer periphery of the clay. Further, it is desirable that the thickness of the clay flow regulating section be thicker than the thickness of the clay.

The magnet is placed inside a case made of a magnetic material, the magnet is in contact with the case on a surface opposite to the surface on which the clay is placed, and there is space between the side surface of the magnet and the case. It is desirable that the case be filled with a non-magnetic filler and that the magnet be fixed to the case.

It is desirable that the cross-sectional shape of the surface of the magnet on which the clay is placed is a concave curved surface.

In this case, it is desirable that the clay flow regulating section is a foam.

According to the first invention, since the clay is placed on the surface that is to be brought into close contact with the leakage location, the gap between the pipe and the pipe can be reliably filled by making the clay follow the irregularities on the surface of the pipe and deform it. Furthermore, since the clay is non-hardening, there is no shrinkage due to hardening, and leaks can be repaired over a long period of time.

On the other hand, since the pressure of the internal fluid is always applied from the leakage point, there is a risk that the clay will deform over time (so-called creep deformation) and a fluid flow path will be formed. However, if the clay is hardened in order to suppress such deformation, the shrinkage caused by hardening may actually cause leakage.

On the other hand, by mixing clay with a magnetic material and using a magnet, the clay will be attracted to the magnet. When such magnetic clay is placed on the surface of a magnet, the magnetic force prevents the clay from moving (deforming) in the in-plane direction of the magnet. Therefore, the pressure of the fluid inside the pipe also suppresses deformation of the clay over time, making it possible to more reliably stop leakage over a long period of time.

Further, by arranging the clay flow regulating section on the outer periphery of the clay, it is possible to suppress the clay from being excessively deformed by the internal pressure of the fluid when the clay is pressed against a leak target or by the subsequent internal pressure of the fluid.

In particular, if the clay flow regulating section is made of foam, the clay flow regulating section can be more reliably brought into close contact with the outer circumferential surface of the pipe or the like.

In addition, by placing the magnet inside a case made of a magnetic material and filling a space between the side surface of the magnet and the case with a non-magnetic filler, it is possible to utilize the magnetic force of the attraction surface of the magnet. The lines of magnetic force on the side opposite to the attracting surface of the magnet pass through the case and emerge on the attracting surface side without being attenuated, so the case can be attracted to the piping with stronger magnetic force.

Moreover, by making the cross-sectional shape of the attracting surface side of the magnet a concave curved surface, the magnet can be arranged along the outer shape of the pipe.

A second invention is a leakage repair method using the leakage repair jig according to the first invention, in which the clay of the leakage repair jig is applied to a leakage location, and the leakage repair jig is applied to a repair target. This is a leakage repair method characterized by fixing the leakage.

The leak repair jig may be fixed to the repair target using a fixing member for pressing the leak repair jig against the repair target.

According to the second invention, leaks in piping, etc. can be repaired with a small amount of work.

Further, by using the fixing member, leakage can be repaired even when the piping or the like is not made of a magnetic material or when the pressure of the internal fluid cannot be suppressed by magnetic attraction alone.

According to the present invention, it is possible to provide a leak repair jig and a leak repair method using the same, which can reliably repair leaks in piping, etc., by a simple method.

FIG. 1 is a perspective view showing a leakage repair jig 1. FIG. (a) is a sectional view taken along line AA in FIG. 1, and (b) is a sectional view taken along line BB in FIG. FIG. 3 is a diagram showing how the leakage repair jig 1 is used. FIG. 4 is an enlarged conceptual diagram of part C in FIG. 3. (a) and (b) are conceptual diagrams showing the progress of leakage in section E in FIG. 4. FIG. 7 is a diagram showing another usage state of the leakage repair jig 1. FIG. 2 is a perspective view showing a leakage repair jig 1a. (a) is a sectional view taken along line II in FIG. 7, and (b) is a sectional view taken along line JJ in FIG. The figure which shows the usage state of the leakage repair jig 1a. (a) is a sectional view taken along line KK in FIG. 9, and (b) is a sectional view taken along line LL in FIG.

(First embodiment)
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the leakage repair jig 1, FIG. 2(a) is a sectional view taken along the line AA in FIG. 1, and FIG. 2(b) is a sectional view taken along the line BB in FIG. be. The leakage repair jig 1 is a jig for repairing a leakage location, and is mainly composed of a case 3, clay 5, flow regulating section 7, magnet 9, filler 11, and the like.

The case 3 is made of a magnetic material and has a substantially box shape, and one side is open. The opening side of the case 3 is the side that is brought into close contact with the leakage location. A magnet 9 is housed inside the case 3. Clay 5 is placed on the surface of magnet 9 on the opening side of case 3 . That is, on at least one surface of the magnet 9, clay 5 is arranged to be brought into close contact with the leakage location.

Clay 5 contains a magnetic material. For example, the clay 5 contains iron powder and the like. Therefore, the clay 5 is attracted to the magnet 9. Note that the clay 5 is not a hardening clay that hardens over time, but a non-hardening clay (including a non-hardening putty) that does not harden or does not harden easily over time. The function of the clay 5 will be described in detail later.

A clearance is formed between the side surface of the magnet 9 and the inner surface of the case 3. Moreover, the magnet 9 contacts the case 3 on the opposite surface to the surface on which the clay 5 is placed. Furthermore, a non-magnetic filler 11 is filled between the side surface of the magnet 9 and the side wall of the case 3. Since the cross-sectional shape of the magnet 9 becomes wider toward the bottom, the magnet 9 is fixed to the case 3 by the filler 11 . Note that the filler 11 is, for example, epoxy resin. Note that, as illustrated, the clay 5 may protrude from the magnet 9 and may also be placed on the upper surface of the filler 11.

Here, the magnet 9 is arranged inside the case 3 so that one magnetic pole faces toward the opening of the case 3 and the other magnetic pole contacts the bottom surface of the case 3. For example, as shown in FIG. 2(a), clay 5 is placed on the N-pole surface of the magnet 9, and the S-pole surface contacts the bottom surface of the case 3. By arranging it in this way, the magnetic field lines of the north pole can be brought out to the side where it comes into close contact with the leakage point, and the magnetic field lines coming out of the south pole can also be brought out through the case 3 to the side where it comes into close contact with the leakage point. Therefore, stronger magnetic force can be obtained on the side that is brought into close contact with the leakage location. Note that the north pole and the south pole may be reversed.

A flow regulating section 7 for regulating the flow of the clay 5 is disposed around the outer periphery of the clay 5. As shown in FIG. 1, the flow regulating section 7 is arranged so as to surround the outer periphery of the clay 5. The flow regulating section 7 is, for example, a foam. If the flow regulating part 7 is made of foam, it can be deformed to a greater extent, so it can be easily crushed if necessary, and will not interfere with the clay 5 coming into close contact with the leakage location. The thickness of the flow regulating part 7 is thicker than the thickness of the clay 5.

Note that the cross-sectional shape in the width direction of the surface of the magnet 9 on which the clay 5 is arranged (the cross-sectional shape shown in FIG. 2(a)) is formed as a concave curved surface according to the external shape of the pipe, etc. The cross section (the cross-sectional shape shown in FIG. 2(b)) is approximately rectangular. By doing so, when attached to the outer surface of the pipe, the magnet 9 and the clay 5 can be reliably brought into close contact with the outer peripheral surface of the pipe. That is, it is desirable that the leak repair jig 1 be designed to have an optimal shape in accordance with standards such as the shape and diameter of the piping to be leaked. Note that since the target of leakage is not limited to piping, a concave curved surface is not required when repairing leakage on a flat surface.

Next, a leak repair method using the leak repair jig 1 will be explained. FIG. 3 is a diagram showing how the leak repair jig 1 is used. In the illustrated example, the leakage portion 15 of the pipe 13 is repaired, but as described above, leaks other than the pipe 13 can also be repaired.

First, the exposed surface of the clay 5 of the leak repair jig 1 is applied to the leak part 15 of the pipe 13, and the leak repair jig 1 is installed on the pipe 13. Here, when the pipe 13 is a magnetic material, the leakage repair jig 1 can be fixed to the pipe 13 to be repaired by the magnetic force of the magnet 9. That is, the magnet 9 functions as a fixing means for fixing the clay 5 to the leakage part. At this time, as described above, by using the magnetic lines of force of both magnetic poles of the magnet 9 to attract the leak repair jig 1 to the pipe 13, the leak repair jig 1 is more strongly attached to the pipe 13. can be adsorbed to.

FIG. 4 is an enlarged conceptual diagram of section C in FIG. 3. As described above, since the clay 5 has an amorphous shape, it can be freely deformed to match the uneven shape of the outer surface of the pipe 13, so that the clay 5 can be reliably brought into close contact with the surface of the pipe 13. Therefore, it is possible to suppress the formation of a gap between the pipe 13 and the clay 5.

Here, the inventors have found that when such clay 5 is used, leakage may occur again from a site where leakage has once stopped as time passes. The cause of this was presumed to be that the clay 5 was deformed over time.

5(a) and 5(b) are enlarged conceptual views of section E in FIG. 4. FIG. As shown in FIG. 5(a), immediately after the leakage repair, the leakage part 15 is blocked by the clay 5, and the clay 5 and the pipe 13 are in close contact with each other and are held down by the attraction of the magnet 9, so that the internal fluid is Leakage can be stopped.

However, the internal pressure of the internal fluid is always applied to the clay 5. The inventors believe that when such a force is constantly applied, the deformation of the clay 5 gradually progresses (arrow H in the figure), as shown in FIG. It was presumed that a minute channel was formed between them. That is, it was estimated that as the minute deformation of the clay 5 gradually progressed, the fluid would flow out through the gap between the clay 5 and the pipe 13, as indicated by arrow D in FIG. 4.

However, on the other hand, if the clay 5 is made of a material that is hard and difficult to deform, it will be difficult to reliably make the clay 5 adhere to the irregularities on the surface of the pipe 13. Therefore, the inventors have come up with this embodiment in which the magnet 9 is used in order to suppress the deformation over time as described above while leaving the deformability of the clay 5 as it is.

In this embodiment, the clay 5 contains a magnetic material (for example, iron powder). Therefore, the clay 5 is attracted by the magnet 9 (arrow F in the figure). When the magnetic material is attracted to the magnet 9, movement in a direction perpendicular to this is also suppressed. For example, iron powder can move freely on the surface of a non-magnetic material, but when placed on the surface of a magnet, the individual iron powders are attracted to each other by magnetic force, so there is a resistance to movement on the surface. works. Further, by attracting the leakage repair jig 1 to the pipe 13, a magnetic field is generated between the magnet 9 and the pipe 13. In this way, a chain structure is formed by the action of a magnetic field on the magnetic particles, and the clay 5 becomes semi-solid, increasing shear resistance. This also suppresses movement of the clay 5 in the axial direction of the pipe. In this way, the magnet 9 can suppress the deformation of the clay 5.

Note that even when the clay 5 is attracted by the magnet 9 in this manner, the clay 5 itself has a large deformability, so if it is strongly pressed against the pipe 13, the clay 5 can be brought into close contact with the surface of the pipe 13. However, if the clay 5 is pressed too hard, the clay 5 will be crushed and the clay will spread to the surrounding area. On the other hand, in this embodiment, since the flow regulating part 7 is arranged around the outer periphery of the clay 5, even if the clay 5 tries to spread (arrow G in the figure), this is regulated by the flow regulating part 7. Furthermore, even if the internal pressure of the fluid is large and the clay 5 attempts to deform beyond the deformation suppressing ability of the magnet 9, the flow regulating section 7 can suppress the deformation (spreading) of the clay 5.

As described above, by using the clay 5 mixed with a magnetic substance and bringing it into close contact with the leakage part 15 while adsorbed by the magnet 9, leakage can be reliably stopped, and the clay 5 may deteriorate over time. The re-occurrence of leakage due to deformation can be suppressed.

In the example shown in FIG. 3, the pipe 13 is made of a magnetic material and the leak repair jig 1 is fixed to the pipe 13 by the magnet 9, but the present invention is not limited to this. For example, as shown in FIG. 6, the leakage repair jig 1 may be fixed to the pipe 13 using a fixing member 17. That is, the fixing member 17 may be used as a fixing means for fixing the clay 5 to the leakage part. The fixing member 17 may be, for example, a clamp or the like, or a band.

As described above, in this embodiment, the purpose of the magnet 9 is not to fix it to the pipe 13, but to suppress the deformation of the clay 5. Therefore, the leak repair jig 1 is attached to the pipe 13 only by the attraction force of the magnet 9. The leak repair jig 1 can be fixed to the piping 13 using the fixing member 17, except when the fixing member 17 can be sufficiently pressed. For this reason, the piping 13 does not necessarily have to be made of a magnetic material, and even in cases where the internal pressure of the piping 13 is extremely high and leakage cannot be stopped only by the attraction of the magnet 9, the leak repair jig 1 can be attached to the piping by the fixing member 17. 13 to repair the leakage.

As explained above, according to the present embodiment, by pressing the clay 5 against the outer circumferential surface of the pipe 13 around the leakage portion 15, the clay 5 can be made to reliably follow the irregularities on the outer surface of the pipe 13. Can be placed in close contact. Therefore, the gap between the pipe 13 and the clay 5 can be filled. Further, since the clay 5 contains a magnetic substance and is closely attached to the pipe 13 while being attracted to the magnet 9, deformation of the clay 5 over time can be suppressed. Therefore, leakage can be repaired with high reliability.

Further, by arranging the flow regulating portion 7, deformation (spreading) of the clay 5 can be suppressed. Therefore, it is possible to prevent the clay 5 from becoming too thin due to crushing, and from being forced and spread by internal pressure.

Further, by using the case 3, the leakage repair jig 1 can be more strongly attracted to the pipe 13.

Further, by using the fixing member 17 for pressing the leak repair jig 1 against the repair target, the leak repair jig 1 can be efficiently fixed to the repair target.

Note that, for example, if the pipe 13 is made of a non-magnetic material, the magnet 9 cannot attract the pipe 13 to the pipe 13, so that the leak repair jig 1 and the pipe 13 do not need to be attracted by strong magnetic force. Therefore, in such a case, case 3 is not necessarily required. Furthermore, if there is no need to suppress the flow of the clay 5, such as when the formation range of the clay 5 is sufficiently wide, the flow regulating section 7 is not necessarily essential.

(Second embodiment)
Next, a second embodiment will be described. FIG. 7 is a perspective view showing a leakage repair jig 1a according to the second embodiment, FIG. 8(a) is a sectional view taken along the line II in FIG. It is a sectional view taken along line JJ. In the following description, components that perform the same functions as those in the first embodiment are designated by the same reference numerals as in FIGS. 1 to 7, and redundant description will be omitted.

The leak repair jig 1a has substantially the same configuration as the leak repair jig 1, but differs in shape and arrangement of each component. A pair of half-split members 2 are used as a set in the leakage repair jig 1a. Note that in FIGS. 7 and 8, only one half member 2 is shown.

The case 3a of the half-split member 2 has a semicircular cross-sectional shape, and becomes approximately cylindrical by making the pair of half-split members 2 face each other and butt against each other. One end side (the right end in FIG. 8(b), hereinafter referred to as the "small diameter" The inner diameter is small and the flow regulating portion 7a is arranged on the inner surface. Further, the inner diameter of the case 3a is enlarged at a portion axially adjacent to the flow regulating portion 7a, and the magnet 9 is arranged so as to be in contact with the enlarged diameter portion. The magnets 9 are also semicircular, and when the pair of half-split members 2 are placed opposite each other, the magnets 9 butt against each other and form a substantially ring shape. Note that the inner diameter of the small-diameter end of the case 3a and the inner diameter of the magnet 9 are approximately the same.

Clay 5a is placed on the inner surface of the magnet 9. Note that the inner diameter of the flow regulating portion 7a disposed on the small diameter side is smaller than the inner diameter of the clay 5a provided therewith. The inner diameter of the case 3a is reduced so as to be placed on the side opposite to the small diameter side of the magnet 9, and the clay 5b is placed in the reduced diameter part. That is, the clays 5a and 5b are formed in multiple stages so as to have different inner diameters. The clays 5a and 5b are attracted to the magnet in the same way as the clay 5 described above. Note that the side end surface of the magnet 9 is exposed between the clay 5a arranged on the surface of the magnet 9 and having a small inner diameter and the clay 5b arranged side by side and having a large inner diameter.

A flow regulating portion 7b is disposed at the end of the case 3a in the axial direction on the opposite side to the small diameter side (hereinafter referred to as the "large diameter side"). That is, flow regulating parts 7a and 7b are arranged at both ends of the case 3a. Therefore, when the half members 2 are made to face each other to form a cylindrical shape, the flow regulating portions 7a, 7b are arranged so as to surround the outer periphery of the clays 5a, 5b. Note that, like the flow regulating section 7 described above, the flow regulating sections 7a and 7b are made of, for example, a foam. Furthermore, the inner diameter of the large-diameter end of the case 3a and the inner diameter of the clay 5b portion of the case 3a that is attached thereto are substantially the same. Further, both flow regulating portions 7a and 7b are thicker than clays 5a and 5b.

Next, a leak repair method using the leak repair jig 1a will be explained. FIG. 9 is a diagram (partial sectional view) showing how the leak repair jig 1a is used, FIG. 10(a) is a sectional view taken along the line KK in FIG. 9, and FIG. It is a sectional view taken along line LL. In this embodiment, a method for repairing leakage near the connection between the pipe 13 and the elbow 19 will be described. In this embodiment, the object to be connected to the pipe 13 is the elbow 19, but it is also applicable to the vicinity of the joint with a flange or other joint.

A pair of half-split members 2 are arranged facing each other on the outer periphery of the pipe 13 and fixed with a fixing member 21 such as a band. That is, a pair of half-split members 2 are butted together to form a cylindrical leak repair jig 1a, which is fixed to the outer periphery of the pipe 13. At this time, they are arranged so that the small diameter side is on the piping 13 side and the large diameter side is on the elbow 19 side. Therefore, the flow regulating part 7a on the small diameter side is pressed against the outer circumferential surface of the pipe 13, and the flow regulating part 7b on the large diameter side is pressed against the outer circumferential surface of the elbow 19.

Further, the leakage repair jig 1a is arranged such that the stepped portions of the clays 5a and 5b (the side end surfaces of the magnets 9) are in contact with the end surfaces of the elbows 19. Further, the clay 5a with a small inner diameter is in close contact with the outer surface of the pipe 13, and the clay 5b with a large inner diameter is in close contact with the outer surface of the elbow 19.

Further, the leak repair jig 1a arranged in this manner is fixed to the elbow 19 by a fixing member 17a which is a fixing means for fixing the clays 5a and 5b to the leak location. The fixing member 17a is composed of, for example, an angle disposed on the outer surface of the pipe 13 and a U-shaped bolt hung on the elbow 19. In this case, the angle comes into contact with the small-diameter end surface of the leakage repair jig 1a, and the U-shaped bolt hung on the elbow 19 is fixed to the angle with a nut. The leak repair jig 1a is fixed by the fixing member 17a so that the leak repair jig 1a (the side end surface of the magnet 9) is pressed against the elbow 19 (the end surface of the elbow 19).

By doing so, the leakage repair jig 1a can be fixed to the pipe 13 having a step near the connection part with the elbow 19, and the leakage can be repaired.

It is also possible to deal with leakage from the connection between the elbow 19 and the pipe 13. In this case, it is desirable that the clay 5 is also placed on the side end surface of the magnet at the step between the clays 5a and 5b. Furthermore, since the case 3a comes into contact with the magnet 9, it becomes a magnet as a whole, but a separate magnet 9 may also be placed on the back side of the clay 5b.

According to the second embodiment, effects similar to those of the first embodiment can be obtained. Further, according to the leakage repair jig 1a, it is possible to deal with leakage near the connection portion with other members.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention is not limited to the embodiments described above. It is clear that those skilled in the art can come up with various changes and modifications within the scope of the technical idea stated in the claims, and these naturally fall within the technical scope of the present invention. It is understood that it belongs.

For example, in each of the embodiments described above, the clays 5, 5a, and 5b are blended with a magnetic material, and the clays 5, 5a, and 5b are attracted by the magnet 9, thereby suppressing the deformation of the clays 5, 5a, and 5b. However, if the clay 5, 5a, 5b hardly deforms over time, such as when the pressure at the leakage part is low, the magnet 9 is unnecessary. That is, it is not necessary to mix the magnetic material into the clays 5, 5a, and 5b. Even in this case, if it is an irregularly shaped non-hardening clay, it can reliably deform by following the irregularities of various sizes on the outer periphery of the pipe, etc., so the clay can be brought into close contact with the leakage part and the magnet or By fixing with a fixing means such as a fixing member, the leakage location can be easily repaired.

Note that if the clay does not contain a magnetic substance, there is no need for a magnet to suppress the deformation of the clay, but if a magnet or fixing member is used as a fixing means, there is no need to place piping, etc. on the back side of the clay. It is desirable to arrange a member having a concave curved surface corresponding to the outer surface of the container so that the clay can be reliably pressed almost evenly over the entire surface near the leakage point.

1, 1a...Leakage repair jig 2...Half member 3, 3a...Case 5, 5a, 5b...Clay 7, 7a, 7b...Flow regulation part 9...Magnet 11 ......Filler 13...Piping 15...Leakage parts 17, 17a...Fixing member 19...Elbow 21...Fixing member

Claims (8)

A leak repair jig for repairing a fluid leak location,
non-hardening clay that adheres to the leakage area;
fixing means for fixing the clay to the leakage location;
a magnet disposed on a surface opposite to the surface of the clay that is in close contact with the leakage location ;
The clay contains a magnetic material, and adheres closely to the leakage point while being attracted to the magnet.
A leakage repair jig characterized by: 2. The leak repair jig according to claim 1, further comprising a clay flow regulating section arranged to surround the outer periphery of the clay . 3. The leakage repair jig according to claim 2, wherein the thickness of the clay flow regulating part is thicker than the thickness of the clay. The magnet is placed inside a case made of a magnetic material,
The magnet contacts the case on a surface opposite to the surface on which the clay is placed,
2. The leak repair jig according to claim 1 , wherein a non-magnetic filler is filled between a side surface of the magnet and the case, and the magnet is fixed to the case. 5. The leak repair jig according to claim 1, wherein a cross-sectional shape of a surface of the magnet on which the clay is placed is a concave curved surface. The leak repair jig according to claim 2 or 3, wherein the clay flow regulating part is a foam. A leak repair method using the leak repair jig according to any one of claims 1 to 6,
A leak repair method characterized by applying the clay of the leak repair jig to the leakage location and fixing the leak repair jig to the repair target. 8. The leak repair method according to claim 7, wherein the leak repair jig is fixed to the repair target using a fixing member for pressing the leak repair jig against the repair target.

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