Method for repairing fluid pipe and structure for repairing fluid pipe

Abstract

This method for repairing a fluid pipe includes the steps of: pressing a drain body 2 against a water pipe K via a seal material 1 surrounding a leakage hole K1 of the water pipe K to cause water leaking from the leakage hole K1 to be discharged from a discharge passage 20 of the drain body 2, and forming a space SP1 to be filled with an adhesive 6 on the outer peripheral side of the seal material 1 with a masking material 7 disposed on the outer peripheral side of the seal material 1; filling the space SP1 with the adhesive 6 through at least one filling passage 24 connecting the inside and the outside of the space SP1; and curing the adhesive 6 with which the space SP1 is filled to fix the drain body 2 to the water pipe K.

Description

Method for Repairing Fluid Pipe and Repair Structure of Fluid Pipe

[0001] The present disclosure relates to a method for repairing a fluid pipe such as a water pipe and a repair structure of a fluid pipe.

[0002] Fluid pipes (such as water pipes) installed outdoors, such as water pipe bridges, may have their strength reduced due to corrosion of the pipes and may leak. When the corroded part of the pipe yields to the water pressure and a leakage hole is formed, water may spurt out from the leakage hole, and repair is required.

[0003] Patent Document 1 discloses a technique for repairing and reinforcing a corroded part of a pipe simultaneously before the corroded part of the pipe yields to the water pressure and leads to leakage. However, this technique cannot be used after leakage has occurred.

[0004] Patent Document 2 discloses a technique for fixing a drain body to a fluid pipe while discharging water from a discharge path of the drain body that covers a leakage hole in a situation where water spurts out from the leakage hole of the fluid pipe, and closing the discharge path of the drain body with a stopper.

[0005] Japanese Patent Application Laid-Open No. 2006-116734 Japanese Patent Application Laid-Open No. 2023-133884

[0006] The present disclosure provides an appropriate method for repairing a fluid pipe and a repair structure of a fluid pipe in a situation where water spurts out from a leakage hole of the fluid pipe.

[0007] The method for repairing a fluid pipe according to the present disclosure includes a step of pressing a drain body against the fluid pipe through a sealing material surrounding a leakage hole of the fluid pipe so that water leaking from the leakage hole is discharged from a discharge path of the drain body, forming a space for filling an adhesive on an outer peripheral side of the sealing material by a masking material disposed on the outer peripheral side of the sealing material, a step of filling the adhesive into the space through at least one filling path connecting the inside and the outside of the space, and a step of curing the adhesive filled in the space to fix the drain body to the fluid pipe.

[0008] The fluid pipe repair structure of this disclosure comprises: a sealing material that surrounds a leak hole formed on the outer surface of the fluid pipe; a drain body having a discharge passage capable of discharging water leaking from the leak hole to the outside, and the discharge passage and the leak hole being arranged in a watertight connection via the sealing material; a closing member that closes the discharge passage; an adhesive arranged on the outer surface of the sealing material that bonds the outer surface of the fluid pipe and the drain body; and a masking material that covers the adhesive from the outer surface of the adhesive.

[0009] Figure 2 is a side view and a partial cross-sectional view of the A1-A1 portion, taken from a line of sight parallel to the diameter direction of the water pipe, perpendicular to the pipe axis direction. Figure 2 is a side view showing the drain body temporarily fixed to the water pipe with a fastener in the first embodiment. Figure 2 is a cross-sectional view of the A2-A2 portion. Figure 2 is a cross-sectional view showing the drain body temporarily fixed to the water pipe with a fastener. Figure 2 is a cross-sectional view showing the state of filling the space between the sealant and the masking material with adhesive. Figure 3 is a cross-sectional view showing the state of closing the discharge passage with a drain plug. Figure 4 is a cross-sectional view showing the repair structure of the water pipe with the fastener removed. Figure 5 is a side view showing the drain body temporarily fixed to the water pipe with a fastener in the second embodiment. Figure 6 is a cross-sectional view showing the state of filling the space between the sealant and the masking material with adhesive and hardening in the third embodiment. Figure 7 is a cross-sectional view showing the outer pipe replaced with a plug insertion machine. Figure 8 is a cross-sectional view showing the state of screwing the first plug into the drain body with the plug insertion machine. Figure 9 is a cross-sectional view showing the state of screwing the second plug into the drain body. Figure 1 is a cross-sectional view showing the state of filling the space between the sealant and the masking material with adhesive in a modified example. Figure 1 is a cross-sectional view showing the repair structure of the water pipe in the fourth embodiment. This figure shows the marking process of the fifth embodiment, and is a side view taken from a line of sight parallel to the diameter direction of the water pipe. This figure shows the arrangement process of the magnet sheet in the fifth embodiment. This figure shows the guiding process using the magnet sheet in the fifth embodiment. This figure shows the temporary fixing process of the drain body in the fifth embodiment. This is a cross-sectional view showing the state in which the drain body is temporarily fixed to the water pipe by the fixing device. This is a view of the drain body from the back in the fifth embodiment. This figure shows the arrangement process of the guide plate in the sixth embodiment. This figure shows the temporary fixing process of the drain body in the sixth embodiment. This figure shows the insertion process of the guide rod member in the seventh embodiment. This figure shows a cross-sectional view along the first surface (cross-sectional view of part A3-A3 in Figure 20) and a cross-sectional view along the second surface (cross-sectional view of part A4-A4 in Figure 20) showing the seal material and drain body of the eighth embodiment. This is a perspective view showing the seal material of the eighth embodiment. This figure shows a cross-sectional view along the first surface (cross-sectional view of part A3-A3 in Figure 20) and a cross-sectional view along the second surface (cross-sectional view of part A4-A4 in Figure 20) showing the seal material and drain body of the ninth embodiment.

[0010] <First Embodiment> A repair method and repair structure for a fluid pipe (water pipe K) according to the first embodiment of the present disclosure will be described with reference to the drawings. Figure 1 is a side view and a partial cross-sectional view of the A1-A1 portion of the water pipe K, viewed from a line of sight parallel to the diameter direction of the pipe, perpendicular to the pipe axis direction AD. Figure 2 is a side view showing the state in which the drain body 2 is temporarily fixed to the water pipe K by the fixing device 4 in the first embodiment. Figure 3 is a cross-sectional view of the A2-A2 portion of Figure 2. Figure 4 is a cross-sectional view showing the state in which the drain body 2 is temporarily fixed to the water pipe K by the fixing device 4. Figure 5 is a cross-sectional view showing the state in which adhesive 6 is filled into the space SP1 between the sealing material 1 and the masking material 7. Figure 6 is a cross-sectional view showing the state in which the discharge passage 20 is closed with the drain plug 5. Figure 7 is a cross-sectional view showing the repair structure of the water pipe K with the fixing device 4 removed.

[0011] The first embodiment of the water pipe K repair method is a method for repairing a water pipe K when a leak hole K1 has formed in the water pipe K and fluid (water) is leaking from the leak hole K1, as shown in Figure 1. The water pipe K repair method uses an annular sealing material 1 and a drain body 2, as shown in Figures 2 to 4.

[0012] Before temporarily fixing the drain body 2 to the water pipe K, a step of cleaning the water pipe K may be performed. This includes cleaning around the leak hole K1 and removing any covering material on the water pipe K. If necessary, the work may be carried out while controlling the leakage of fluid from the leak hole K1 (by installing a wooden plug or drain). After the above cleaning step of the water pipe K, as shown in Figure 1, a marking M1 (marking line) parallel to the pipe axis AD passing through the leak hole K1 and a marking M2 (marking line) along a plane perpendicular to the pipe axis AD passing through the leak hole K1 may be applied to the outer surface of the water pipe K. These markings M1 and M2 are shown only in Figures 1 and 2 and are omitted in other figures.

[0013] As shown in Figure 4, the sealant 1 is positioned between the outer surface of the water pipe K and the drain body 2, surrounding the leak hole K1 of the water pipe K. The sealant 1 is formed in an annular shape with the axis C1 of the discharge passage 20 of the drain body 2 (described later) as the center. The sealant 1 can be made of any material such as rubber or sponge, as long as it has a sealing function. Multiple protrusions are formed at the tip of the sealant 1. The tip of each protrusion extends radially inward into the discharge passage 20. This prevents or suppresses the protrusions from being overcome by water pressure and spreading radially outward into the discharge passage 20, thereby reducing the water-stopping performance. Furthermore, when water pressure is applied, each of the multiple protrusions of the sealant 1 adheres tightly to the surface of the water pipe K, ensuring reliable water-stopping performance.

[0014] As shown in Figure 3, the drain body 2 has a cylindrical portion 21 having a discharge passage 20 for receiving fluid leaking from the leak hole K1 and discharging it to the outside, and a flange portion 22 at the base end of the cylindrical portion 21 that faces the outer circumferential surface of the water pipe K. The flange portion 22 faces the outer circumferential surface of the water pipe K including the leak hole K1 and covers the outer circumferential surface of the water pipe K including the leak hole K1. The flange portion 22 has a larger outer diameter than the cylindrical portion 21, but the entire circumference of the flange portion 22 does not need to be larger than that of the cylindrical portion 21. Also, the drain body 2 does not cover the entire outer circumferential surface of the water pipe K, but only a part of it. It is preferable that the drain body 2 is made of metal.

[0015] As shown in Figure 4, when the drain body 2 is fixed to the water pipe K, the discharge passage 20 and the leak hole K1 face each other. The cylindrical portion 21 can be directly or indirectly connected to an external pipe 3 (pipe or hose) for discharging fluid. The discharge passage 20 in the cylindrical portion 21 is also configured to be closable with a plug. Specifically, a threaded hole is formed at the tip of the discharge passage 20 of the cylindrical portion 21, and the drain plug 5 can be temporarily fixed to the drain body 2 by partially screwing a drain plug 5 that matches the threaded hole into this threaded hole. By screwing the external pipe 3 into the hole 5a of the drain plug 5 and fixing it, the external pipe 3 can be connected to the discharge passage 20, and the external pipe 3 can be connected to the drain body 2. In the first embodiment, the flange portion 22 is circular when viewed from a line parallel to the axis C1 of the discharge passage 20, as shown in Figure 2, but it is not limited to this and may be rectangular or elliptical in shape.

[0016] In the first embodiment, as shown in Figure 7, the drain body 2 is bonded and fixed to the water pipe K using only adhesive 6. However, if the adhesive 6 gets wet with fluid (water) before it hardens, it is often difficult to bond properly. Also, if the viscosity of the adhesive 6 is low, there is a risk that it will drip before it hardens.

[0017] Therefore, as shown in Figure 3, a masking material 7 is placed on the outer circumference of the sealant 1. The masking material 7 is separated from the sealant 1. By placing the masking material 7, a space SP1 (see Figure 4) for filling with adhesive 6 can be formed between the drain body 2, the outer surface of the water pipe K, the sealant 1, and the masking material 7. As shown in Figures 2 and 3, the masking material 7 is adhered to the outer surface of the drain body 2 around its entire circumference. In the first embodiment, the masking material 7 is sponge rubber with a hardness of 20 degrees. The sealant 1 is water-stopping rubber with a hardness of 50 degrees. The hardness referred to here is obtained by a measurement method based on JIS K 6253. The relationship between the hardness of the masking material 7 and the sealant 1 is not limited to the above, and the hardness of the masking material 7 may be higher than that of the sealant 1, but in order to accurately ensure the water-stopping performance of the sealant 1, it is preferable that the hardness of the masking material 7 is less than or equal to the hardness of the sealant 1. Furthermore, it is preferable that the hardness of the masking material 7 is lower than the hardness of the sealing material 1.

[0018] As shown in Figure 3, in a natural state without any external force applied, it is preferable that the masking material 7 protrudes more toward the water pipe K than the sealing material 1. When the sealing material 1 is in contact with the water pipe K, the masking material 7 is reliably compressed, which reduces leakage of the adhesive 6. Of course, in a natural state, the tip of the masking material 7 and the tip of the sealing material 1 may protrude toward the water pipe K at the same position.

[0019] As shown in Figure 3, the drain body 2 has a projection 23 on the outer circumference of the sealant 1. The projection 23 is spaced apart from the sealant 1. By providing the projection 23, compared to when the projection 23 is not provided, it becomes easier to return the drain body 2 to a position where the sealant 1 is uniformly compressed when the drain body 2 is pressed against the water pipe K at an angle, thereby making it easier to ensure watertightness. In other words, compared to when the projection 23 is not present, it is possible to reduce the gap between the water pipe K and the drain body 2 and stabilize the position of the drain body 2. Furthermore, similar to the masking material 7, it acts as a wall for the adhesive 6 and improves weather resistance. In addition, compared to when the projection 23 is not present, it is possible to increase the contact area between the drain body 2 and the adhesive 6 and improve adhesive strength. It is preferable that the tip of the projection 23 is positioned further away from the water pipe K than the tip of the sealant 1 in its natural state. Note that the projection 23 is optional. As shown in Figure 2, markings M3 and M4 corresponding to the markings M1 and M2 on the water pipe K may be attached to the drain body 2 and the retaining device 41. In Figure 2, the marking M4 located to the right of the leak hole K1 is omitted from the illustration because it overlaps with the dashed line indicating the location of arrow A2.

[0020] Before fixing the drain body 2 with adhesive 6, the drain body 2 is temporarily fixed to the water pipe K with a non-adhesive fixing device 4, as shown in Figures 2 to 4. During temporary fixing, as shown in Figure 2, the markings M3 and M4 attached to the drain body 2 and the retaining device 41 should be aligned with the markings M1 and M2 attached to the water pipe K. By providing markings M1 to M4 in this way, it becomes possible to easily align the leak hole K1 and the drain body 2. The non-adhesive fixing device 4 of the first embodiment includes a magnet part 40 that adheres to the water pipe K, and a retaining device 41 that can press the drain body 2 against the water pipe K using the magnet part 40 as a base. The magnet part 40 includes a magnet and a bolt such as a wing bolt that can be fixed to the magnet. The retaining device 41 includes a plate-shaped part having a first part and a second part. The first part of the plate-shaped part is fixed to the drain body 2 with a bolt V1. The second portion of the plate-shaped part is a hole or notch for fixing the magnet part 40 through a wing bolt, and the magnet part 40 is attached thereto. Looking along the axis C1 of the discharge passage 20, at least two magnet parts 40 are arranged on either side of the discharge passage 20. The two magnet parts 40 are arranged along the pipe axis direction AD. This enables stable attraction to water pipes K of any diameter. In the first embodiment, there are two magnet parts 40, but this can be changed as appropriate. The number of magnet parts 40 may be three, or four or more. It is preferable that a pair of magnet parts 40 are arranged symmetrically with respect to the discharge passage 20.

[0021] As shown in Figure 4, the drain body 2, to which the magnet part 40 and the retaining clip 41 are attached, is pressed against the water pipe K so as to cover the leak hole K1. At this time, the sealing material 1 placed between the drain body 2 and the water pipe K is positioned to surround the leak hole K1 of the water pipe K. At the same time, the fluid (water) leaking from the leak hole K1 is discharged through the drain passage 20 of the drain body 2 via the drain plug 5 and the outer pipe 3, while the magnet part 40 is attracted to the water pipe K. The water pipe K is a pipe made of magnetic material to which the magnet part 40 can be attracted. In this way, the drain body 2 is temporarily fixed to the water pipe K by the fixing clip 4. In order to press the drain body 2 against the water pipe K without discharging the fluid (water) leaking from the leak hole K1, it is necessary to press with a force stronger than the pressure of the fluid (water) leaking from the leak hole K1. However, in the first embodiment, since the fluid (water) leaking from the leakage hole K1 is discharged through the drain passage 20 of the drain body 2 via the outer pipe 3, the force required for the magnet part 40 to hold down the water pipe K can be reduced compared to the case where there is no fluid discharge, and the temporary fixing of the drain body 2 becomes easier.

[0022] As shown in Figure 4, with the drain body 2 temporarily fixed, a space SP1 for filling with adhesive 6 is formed on the outer circumference of the seal material 1 by a masking material 7 placed on the outer circumference of the seal material 1. The space SP1 is formed in an annular shape on the outer circumference of the seal material 1. As shown in Figure 3, a filling passage 24 for injecting adhesive 6 into the space SP1 is formed in the drain body 2. The filling passage 24 extends parallel to the axis C1 of the discharge passage 20, but is not limited to this. As shown in Figure 2, in the first embodiment, two filling passages 24 are formed in the drain body 2. The filling passage 24 connects the inside and outside of the space SP1.

[0023] When water is gushing out of the leak hole K1 of the water pipe K, if the drain body 2 is pressed against the water pipe K, water often remains in the space SP1. Therefore, a step is performed to remove the water in the space SP1 for filling with adhesive 6. One example of water removal is to blow air into at least one filling passage 24. More specifically, this involves blowing air into one of the two filling passages 24 and discharging water from the other filling passage 24. This makes it possible to remove water that inhibits the curing of the adhesive 6. Note that the filling passage 24 into which air is blown and the filling passage 24 from which water is discharged may be the same, and the step of removing water can be performed as long as there is one or more filling passages 24.

[0024] Next, as shown in Figure 5, the adhesive 6 is filled into the space SP1 through at least one filling channel 24. In the example in Figure 5, the adhesive 6 is continuously injected from the first filling channel 24 of the two filling channels 24. Once the adhesive 6 has traveled around the annular space SP1 and the space SP1 is filled with adhesive 6, the adhesive 6 will become exposed from the second filling channel 24 of the two filling channels 24. The injection of adhesive 6 can be stopped when the second filling channel 24 is filled with adhesive 6 and exposure is confirmed. In other words, the filling of adhesive 6 into the first filling channel of the multiple filling channels 24 may be started, and the filling of adhesive 6 into the first filling channel may be stopped when adhesive 6 appears from a second filling channel different from the first filling channel among the multiple filling channels 24. Here, the injection of adhesive 6 may be stopped when the adhesive 6 becomes visible through the second filling passage 24, preventing the adhesive 6 from filling into the second filling passage 24, or the injection of adhesive 6 may be stopped when the interface of the adhesive 6 reaches near the opening of the second filling passage 24, allowing the adhesive 6 to fill into the second filling passage 24.

[0025] Next, while the water is continuously discharged through the outer pipe 3, the adhesive 6 is allowed to cure for a predetermined curing time, thereby curing the adhesive 6 that has filled the space SP1. The cured adhesive 6 is partially or completely covered by the masking material 7 from the outer periphery of the sealant 1, i.e., from the outer periphery of the adhesive 6. This reduces or prevents the adhesive 6 from being exposed to the external environment.

[0026] Once the adhesive 6 has hardened, the outer pipe 3 is removed, as shown in Figure 6, and the drain plug 5 is rotated further to close the discharge passage 20 with the drain plug 5. The drain plug 5 has a second sealing material 5b (O-ring), which seals off water between it and the drain body 2. Next, as shown in Figure 7, the bolt V1 is removed and the fastener 4 is removed to complete the repair work.

[0027] Furthermore, the drain body 2 is fixed in a manner that covers only a portion of the outer surface of the water pipe K, including the leakage hole K1. This means that it is not a valve provided in a housing device that completely encloses the water pipe K in a sealed state. In addition, the inside of the drain body 2 is in communication with the inside of the water pipe K, while the outside of the drain body 2 is not filled with fluid.

[0028] <Second Embodiment> A second embodiment will now be described. Figure 8 is a side view showing the drain body 2 temporarily fixed to the water pipe K by the fixing device 4 in the second embodiment. In the first embodiment, the two filling passages 24 are arranged only on one side of the virtual plane passing through the axis C1 of the discharge passage 20 and the pipe axis direction AD, but the invention is not limited to this. As shown in Figure 2 of the second embodiment, multiple (two) filling passages 24 may be arranged on both sides of the virtual plane passing through the axis C1 of the discharge passage 20 and the pipe axis direction AD. By arranging multiple filling passages 24 in this way, when the drain body 2 is temporarily fixed to the outer surface of the water pipe K, any of the filling passages 24 can be placed in the lower part of the space SP1, making it easier to remove the water in the space SP1 using gravity. Alternatively, multiple (two) filling passages 24 may be arranged in positions symmetrical with respect to the axis C1 of the discharge passage 20. In this way, by arranging at least two of the multiple filling passages 24 in positions symmetrical with respect to the axis C1 of the discharge passage 20, it becomes easier to spread the adhesive 6 throughout the space SP1. Furthermore, the discharge of adhesive 6 from one of the filling channels 24 makes it possible to confirm that the adhesive 6 has spread throughout the entire circumference of the space SP1, thereby ensuring the reliability of the construction.

[0029] <Third Embodiment> The third embodiment will now be described. In the third embodiment, a different outer pipe 103 is used instead of the drain plug 5 and outer pipe 3 of the first embodiment. Figure 9 is a cross-sectional view showing the state in which adhesive 6 has been filled between the sealing material 1 and the masking material 7 and cured in the third embodiment. Figure 10 is a cross-sectional view showing the state in which the outer pipe 103 has been replaced with a plug insertion machine 104. Figure 11 is a cross-sectional view showing the state in which the first plug 105 has been screwed into the drain body 2 using the plug insertion machine 104. Figure 12 is a cross-sectional view showing the state in which the second plug 106 has been screwed into the drain body 2.

[0030] As shown in Figure 9, the discharge passage 20 of the drain body 2 in the third embodiment has two threaded holes of different diameters. A connecting pipe 101, such as a male threaded pipe, is connected to the larger of the two threaded holes, a valved pipe 102, such as a ball valve, is connected to the connecting pipe 101, and an outer pipe 103 is connected to the valved pipe 102. The valve of the valved pipe 102 is in the open state, and water leaking from the leakage hole K1 of the water pipe K is discharged through the outer pipe 103. Note that if the valved pipe 102 has a male thread and can be connected to the drain body 2, the connecting pipe 101 can be omitted.

[0031] Next, as shown in Figure 10, the valve is closed by operating the handle of the valved pipe 102, and the outer pipe 103 is removed. Figure 10 shows that the valve body 102a is closing the discharge passage 20. After removing the outer pipe 103, the plug inserter 104 is attached to the valved pipe 102. The plug inserter 104 includes a housing 104a that is attached to the valved pipe 102, and a holding part 104b that holds the first plug 105, which is located inside the housing 104a, so that it can move forward and backward. The holding part 104b is configured to slide while maintaining a watertight state relative to the housing 104a. Note that the holding part 104b is not hatched in Figure 10.

[0032] Next, as shown in Figure 11, the handle is operated to open the valve of the valved pipe 102, and the plug insertion machine 104 is operated to screw the first plug 105 into the small-diameter threaded hole formed in the drain body 2, thereby closing the discharge passage 20 with the first plug 105. Next, the water shut-off confirmation valve 104c provided on the plug insertion machine 104 is opened to confirm that the discharge passage 20 has been closed by the first plug 105. Once the closure of the discharge passage 20 by the first plug 105 is confirmed, as shown in Figure 12, the connecting pipe 101, the valved pipe 102, and the plug insertion machine 104 are removed, and the second plug 106 (main plug) is screwed into the large-diameter threaded hole formed in the drain body 2 to double-close the discharge passage 20. Next, the bolt V1 is removed and the fixing device 4 is removed, completing the repair work.

[0033] <Fourth Embodiment> The fourth embodiment will now be described. Figure 14 is a cross-sectional view showing the repair structure of the water pipe K in the fourth embodiment. The fourth embodiment is an example in which the discharge passage 20 of the drain body 2 is closed with a valved pipe 102 instead of a plug (5). As shown in Figure 14, a valved pipe 102 such as a ball valve is connected to the drain body 2, and an outer pipe 103 (not shown in Figure 14) is connected to the valved pipe 102 to discharge the fluid (water) leaking from the leak hole K1 through the outer pipe 103. Once the adhesive 6 has hardened, the handle of the valved pipe 102 is operated to close the valve, and the outer pipe 103 is removed. Furthermore, the handle is removed from the valved pipe 102. If necessary, a plug or cap is fitted to the opening of the valved pipe 102 to close it. The valved pipe 102 is left connected to the drain body 2. In other words, in the first to third embodiments, the closing member that closes the discharge passage 20 of the drain body 2 is a plug (water drain plug 5, first plug 105, second plug 106). In contrast, in the fourth embodiment, the closing member that closes the discharge passage 20 of the drain body 2 is a valved pipe 102. In short, the closing member that closes the discharge passage 20 of the drain body 2 can be any member that can close the discharge passage 20.

[0034] <Fifth Embodiment> The fifth embodiment will now be described. In the fifth embodiment, the drain body 2 is pressed against the outer surface of the water pipe K by a pair of magnet parts 40 associated with the drain body 2. In order to accurately press the drain body 2 against the water pipe K with the pair of magnet parts 40, it is necessary to position the pair of magnet parts 40 on a virtual line parallel to the pipe axis direction AD and passing through the leakage hole K1. However, the magnet parts 40 of the magnet used to attract and fix the drain body 2 to the water pipe K against the force of water leakage are strong, and there is a problem that once the magnet parts 40 are attracted to the water pipe K, it is difficult to fine-tune the position of the magnet parts 40. The fifth embodiment provides a method to improve this problem.

[0035] Figure 15 shows the marking process of the fifth embodiment and is a side view of the water pipe K as seen from a line parallel to the diameter direction of the pipe. In Figure 15, the marking M1 (marking line) is shown by hatching. First, as shown in Figure 15, a marking M1 (marking line) is applied to the outer surface of the water pipe K, parallel to the pipe axis direction AD and passing through the leak hole K1. The marking M1 can be drawn on the outer surface of the water pipe K using a marking jig 50. The marking jig 50 is a plate-shaped member and has a leak hole alignment hole 50a and a gauge hole 50b. The leak hole alignment hole 50a of the marking jig 50 is aligned with the leak hole K1, and the marking jig 50 is brought into contact with the outer surface of the water pipe K so that the gauge hole 50b is parallel to the pipe axis direction AD. A marking tool such as chalk is inserted into the gauge hole 50b of the marking jig 50 to apply the marking M1 (marking line) to the outer surface of the water pipe K. After marking the water pipe K with marking M1 (marking line), the marking jig 50 is removed from the water pipe K.

[0036] Figure 16 shows the arrangement process of the magnet sheet 51 (guide member) in the fifth embodiment. As shown in Figure 16, the magnet sheet 51, which is an example of a guide member, is fixed to the outer surface of the water pipe K. The guide member in the fifth embodiment is the magnet sheet 51, which can be attracted and fixed to the outer surface of the water pipe K by its magnetic force. The magnetic force of the magnet sheet 51 is weaker than the magnetic force of the magnet part 40, making position adjustment easy. The magnet sheet 51 is composed of a plurality (two) divided body. At least one of the plurality (two) divided body has a recess 51a that opens the leak hole K1 when the plurality (two) divided body parts are brought together. In the fifth embodiment, the recess 51a is formed in all divided body parts, but it is not limited to this. It is sufficient that the recess 51a is formed in at least one of the plurality (two) divided body parts. As shown in the upper part of Figure 16, first, the first divided body of the plurality (two) divided body parts is attracted and fixed to the water pipe K. Next, as shown in the lower part of Figure 16, the second of the multiple (two) divided parts is attached to the water pipe K by suction while abutting it against the first divided part. This allows the magnetic sheet 51 to be easily attached to the water pipe K while avoiding water gushing out from the leak hole K1. The magnetic sheet 51 has a mark M5. The recess 51a is aligned with the leak hole K1, and the mark M5 is aligned with the marking M1 attached to the water pipe K (corresponding state), and the magnetic sheet 51 is attached to the outer surface of the water pipe K by suction. Since the magnetic sheet 51 is not a single piece but divided, the magnetic sheet 51 can be attached to the water pipe K without being affected by water leakage from the leak hole K1.

[0037] Figure 17 shows the guiding process using the magnetic sheet 51 in the fifth embodiment. As shown in Figure 17, the guide surface 51b of the magnetic sheet 51 guides the pair of magnetic parts 40 to position the pair of magnetic parts 40 at a fixed position P1 and fixes them by suction. The fixed position P1 is on a virtual line on the outer surface of the water pipe K that is parallel to the pipe axis direction AD and passes through the leak hole K1. A part of the shape of the magnetic part 40 matches the shape of the guide surface 51b, and by arranging the magnetic part 40 along the guide surface 51b, the magnetic part 40 can be positioned at the fixed position P1. After the magnetic part 40 is fixed to the water pipe K by suction, the magnetic sheet 51 is removed from the water pipe K.

[0038] Figure 18 shows the temporary fixing process for the drain body 2 in the fifth embodiment. Marking M1 is omitted from the illustration in Figure 18. Figure 19 is a cross-sectional view showing the state in which the drain body 2 is temporarily fixed to the water pipe K by the fixing device 4. As shown in Figures 18 and 19, the drain body 2 is attached to a pair of magnet parts 40 that are adsorbed and fixed to the water pipe K via an attachment member (pressing device 41), and the drain body 2 is pressed against the water pipe K. Specifically, the drain body 2 can be fixed to the pair of magnet parts 40 by inserting the bolt of the magnet part 40 into the hole of the pressing device 41 attached to the drain body 2 via a bolt V1 and fastening the wing nut. At this time, by tightening the wing nut, the sealing material 1 is compressed against the water pipe K, and water does not leak into the space SP1 filled with adhesive 6 on the outer circumference side of the sealing material 1. Since this work is performed with water being discharged from the discharge passage 20 of the drain body 2, there is no resistance from water pressure, and the temporary fixing of the drain body 2 becomes easy. Subsequently, an example can be given of connecting the outer pipe 103 to the valved pipe 102 attached to the drain body 2 to discharge the leaking water.

[0039] Figure 20 is a view of the drain body 2 in the fifth embodiment from the back. As shown in Figures 18 and 20, the drain body 2 has a plurality of filling passages 24 inside the drain body 2. In the fifth embodiment, the drain body 2 has four filling passages 24. As shown in Figure 20, a partitioning member 53 is provided to divide the space SP1 between the sealing material 1 and the masking material 7 into a plurality of spaces. In the fifth embodiment, the space SP1 is divided into two spaces (first space SP2, second space SP3). The plurality (four) filling passages 24 include filling passages 24 that communicate with each of the two spaces (first space SP2, second space SP3). That is, two of the four filling passages 24 communicate with the first space SP2, and the remaining two of the four filling passages 24 communicate with the second space SP3. It is preferable that two filling passages 24 are provided for one space SP1. This is because if adhesive 6 is injected from one of the two filling passages 24, and the adhesive 6 flows out or can be seen from the other filling passage 24, it can be confirmed that the adhesive 6 has spread throughout the space. Therefore, if the number of spaces is N, the number of filling passages 24 can be exemplified as 2 × N. With this configuration, even when the drain body 2 is difficult to see, such as when the drain body 2 is installed facing upward from below the water pipe K, or when the adhesive 6 must be injected against gravity from the filling passage 24, the adhesive 6 can be accurately filled.

[0040] <Sixth Embodiment> The sixth embodiment will now be described. The sixth embodiment is a configuration in which the magnet sheet 51 of the fifth embodiment is changed to a guide plate 52. Figure 21 is a diagram showing the arrangement process of the guide plate 52 (guide member) in the sixth embodiment. After the marking process shown in Figure 15, the arrangement process of the guide plate 52 (guide member) shown in Figure 21 is performed. As shown in Figure 21, the guide plate 52 has a magnet 52a. The magnet 52a of the guide plate 52 is attracted to the outer surface of the water pipe K, and the guide plate 52 is fixed to the outer surface of the water pipe K. The magnetic force of the magnet 52a of the guide plate 52 is weaker than the magnetic force of the magnet part 40. The mounting shaft 52b of the magnet 52a of the guide plate 52 is the mark, and the guide plate 52 is positioned so that the mounting shaft 52b of the magnet 52a coincides with the marking M1 on the water pipe K.

[0041] Figure 22 shows the temporary fixing process of the drain body 2 according to the sixth embodiment. In Figure 22, the marking M1 is not shown. As shown in the upper part of Figure 22, a pair of magnet parts 40, which are attached to the drain body 2 via an attachment member (pressure tool 41) and then attracted to the outer surface of the water pipe K. Next, as shown in the lower part of Figure 22, the drain body 2 or the member associated with the drain body 2 (pressure tool 41) is guided by the guide plate 52 to slide the pair of magnet parts 40 to the fixing position P1.

[0042] <Seventh Embodiment> The seventh embodiment will now be described. In the seventh embodiment, the guide members (magnet sheet 51, guide plate 52) used in the fifth and sixth embodiments are not used in the construction method. Figure 23 is a diagram showing the insertion process of the guide rod member 54 in the seventh embodiment. After the marking process shown in Figure 15, the insertion process shown in Figure 23 is performed. As shown in Figure 23, the guide rod member 54 is inserted into the leak hole K1 of the water pipe K. The guide rod member 54 may completely block the leak hole K1, or the guide rod member 54 may not block the leak hole K1 and the leakage state may continue. Next, using the guide rod member 54 as a marker, the guide rod member 54 is inserted into the discharge passage 20 of the drain body 2, and the pair of magnet parts 40 are positioned at the fixed position P1. This construction method can be used when the force and amount of leaking water are small, in order to insert the guide rod member 54 into the leak hole K1 against the water leaking from the leak hole K1.

[0043] <Eighth Embodiment> The eighth embodiment will now be described. The eighth embodiment is an example in which the shape of the seal material 1 is changed compared to the fifth embodiment. Figure 24 is a diagram showing a cross-sectional view along the first surface (cross-sectional view of part A3-A3 in Figure 20) and a cross-sectional view along the second surface (cross-sectional view of part A4-A4 in Figure 20) showing the seal material 1 and drain body 2 of the eighth embodiment. The first surface is a surface that includes the axis C1 of the discharge passage 20 and the pipe axis (AD). The second surface is a surface that includes the axis C1 of the discharge passage 20 and is perpendicular to the second surface. The second surface is also perpendicular to the pipe axis direction AD. Figure 25 is a perspective view showing the seal material 1 of the eighth embodiment. As shown in Figure 25, the tip of the seal material 1 has a plurality of protrusions that project toward the outer surface of the water pipe K. The plurality of protrusions include a first protrusion 11, a second protrusion 12, and a third protrusion 13. The first projection 11, the second projection 12, and the third projection 13 are arranged in order from the radially inward to the radially outward direction, centered on the axis C1 of the discharge passage 20. The first projection 11 is closest to the axis C1 of the discharge passage 20. The third projection 13 is furthest from the axis C1 of the discharge passage 20. The tips of the first projection 11, the second projection 12, and the third projection 13 extend in an annular shape around the axis C1 of the discharge passage 20.

[0044] The sealing material 1 of the first to seventh embodiments is formed to be rotationally symmetric about the axis C1 of the discharge passage 20, and the thickness of each protrusion (11, 12, 13) along the axis C1 of the discharge passage 20 is constant. On the other hand, in the sealing material of the eighth embodiment, the thickness of each protrusion (11, 12, 13) along the axis C1 of the discharge passage 20 varies depending on the circumferential location around the axis C1 of the discharge passage 20.

[0045] Specifically, as shown in FIGS. 25 and 24, the thickness of the protrusions (11, 12, 13) at the portion (A3 - A3 cross-section) through which the first surface passes is the thinnest. The thickness of the protrusions (11, 12, 13) at the portion (A4 - A4 cross-section) through which the second surface passes is the thickest. The surface on the base end side of the sealing material 1 is a flat surface orthogonal to the axis C1 of the discharge passage 20. Therefore, as shown in FIG. 24, the tips (the first protrusion 11, the second protrusion 12, the third protrusion 13) of the sealing material 1 at the portion (A4 - A4 cross-section) through which the second surface passes protrude toward the outer peripheral surface of the water pipe K when viewed along the axis C1 of the discharge passage 20 more than the tips (the first protrusion 11, the second protrusion 12, the third protrusion 13) of the sealing material 1 at the portion (A3 - A3 cross-section) through which the first surface passes. Specifically, the first protrusion 11 at the portion (A3 - A3 cross-section) through which the first surface passes is arranged at the position farthest from the outer peripheral surface of the water pipe K when viewed along the axis C1 of the discharge passage 20. At the portion (A3 - A3 cross-section) through which the first surface passes, the second protrusion 12 protrudes toward the outer peripheral surface of the water pipe K more than the first protrusion 11. At the portion (A3 - A3 cross-section) through which the first surface passes, the third protrusion 13 protrudes toward the outer peripheral surface of the water pipe K more than the second protrusion 12. The first protrusion 11 at the portion (A4 - A4 cross-section) through which the second surface passes protrudes toward the outer peripheral surface of the water pipe K more than the third protrusion 13 at the portion (A3 - A3 cross-section) through which the first surface passes. At the portion (A4 - A4 cross-section) through which the second surface passes, the second protrusion 12 protrudes toward the outer peripheral surface of the water pipe K more than the first protrusion 11. At the portion (A4 - A4 cross-section) through which the second surface passes, the third protrusion 13 protrudes toward the outer peripheral surface of the water pipe K more than the second protrusion 12.

[0046] As a result, since the tip of the sealing material 1 is arranged along the curvature of the outer peripheral surface of the water pipe K, the sealing material 1 can easily adhere to the outer peripheral surface of the water pipe K, and it becomes possible to stabilize the water-stopping performance.

[0047] As shown in Fig. 24, the first protrusion 11, the second protrusion 12, and the third protrusion 13 are arranged on a virtual curve along the radius of curvature R2 at the part where the second surface passes through (cross-section of the A4 - A4 part). The radius of curvature R2 is smaller than the radius of curvature R1 of the outer peripheral surface of the water pipe K. This makes it easier to appropriately contact the plurality of protrusions (11, 12, 13) with the outer peripheral surface of the water pipe K.

[0048] <Ninth Embodiment> The ninth embodiment will be described. Similar to the eighth embodiment, in the ninth embodiment, the tips (the first protrusion 11, the second protrusion 12, the third protrusion 13) of the sealing material 1 at the part where the second surface passes through (cross-section of the A4 - A4 part) protrude toward the outer peripheral surface of the water pipe K along the axis C1 of the discharge passage 20 as viewed along the axis C1 of the discharge passage 20 compared to the tips (the first protrusion 11, the second protrusion 12, the third protrusion 13) of the sealing material 1 at the part where the first surface passes through (cross-section of the A3 - A3 part). To achieve this, the shape of the drain body 2 in the ninth embodiment is changed. Specifically, the support surface 25 of the drain body 2 that is adhered to the base end surface of the sealing material 1 is changed from a flat surface to a curved surface. The sealing material 1 has a rotationally symmetric shape centered on the axis C1 of the discharge passage 20, similar to the first to seventh embodiments.

[0049] Fig. 26 is a view showing a cross-sectional view along the first surface (cross-sectional view of the A3 - A3 part in Fig. 20) and a cross-sectional view along the second surface (cross-sectional view of the A4 - A4 part in Fig. 20) of the sealing material 1 and the drain body 2 of the ninth embodiment. In the cross-sectional view along the first surface shown in Fig. 26 (cross-sectional view of the A3 - A3 part in Fig. 20), the support surface 25 of the drain body 2 (the surface adhered to the base end surface of the sealing material 1) is flat. On the other hand, in the cross-sectional view along the second surface shown in Fig. 26 (cross-sectional view of the A4 - A4 part in Fig. 20), the support surface 25 of the drain body 2 (the surface adhered to the base end surface of the sealing material 1) is curved. The bending direction of the support surface 25 corresponds to the curvature of the outer peripheral surface of the water pipe K. Thereby, even when using the sealing material 1 with a rotationally symmetric shape, similar to the eighth embodiment, the tips (the first protrusion 11, the second protrusion 1, the third protrusion 13) of the sealing material 1 at the part where the second surface passes through (cross-section of the A4 - A4 part) protrude toward the outer peripheral surface of the water pipe K along the axis C1 of the discharge passage 20 as viewed along the axis C1 of the discharge passage 20 compared to the tips (the first protrusion 11, the second protrusion 12, the third protrusion 13) of the sealing material 1 at the part where the first surface passes through (cross-section of the A3 - A3 part), can be realized.

[0050] <Modification> (A) In the above embodiment, the retaining clip 41 of the fixing device 4 is temporarily fixed in a state that extends in the pipe axis direction AD of the water pipe K, but is not limited to this. For example, it may be temporarily fixed in a state that extends in the circumferential direction of the water pipe K.

[0051] (B) In the above embodiment, the filling passage 24 is formed in the drain body 2, but is not limited to this. For example, it may be as shown in Figure 13. Figure 13 is a cross-sectional view showing a modified example in which adhesive 6 is filled into the space SP1 between the sealing material 1 and the masking material 7. For example, as shown in Figure 13, the filling passage 24 for filling the space SP1 with adhesive 6 may be formed in the masking material 7, or it may be formed between the masking material 7 and the outer surface of the water pipe K. That is, at least one filling passage 24 may include a passage formed in the masking material 7. This ensures that adhesive 6 is reliably filled when the drain body 2 is installed directly below or below the water pipe K. In addition, in the above embodiment, two filling passages 24 are provided, but the number can be changed as appropriate as long as one or more filling passages 24 are formed. Multiple filling passages 24 may be sealed with a sealing member such as a rubber stopper as needed.

[0052] (C) In the above embodiment, the space SP1 for filling with adhesive 6 is formed in an annular shape, but is not limited thereto. For example, a part of the space SP1 may be closed off so that the space SP1 is formed in a partially annular shape. Alternatively, a plurality of independent spaces SP1 may be arranged on the outer circumference of the sealing material 1.

[0053] (D) In ​​the above embodiment, a step of removing water remaining in space SP1 is performed, but depending on the type of adhesive 6 and the amount of water remaining, the step of removing water may be omitted.

[0054] (E) In the above embodiment, the masking material 7 is adhered to the outer surface of the drain body 2 over its entire circumference, but is not limited to this. For example, the masking material 7 may not be adhered to the outer surface of the drain body 2, but rather provided on the surface of the drain body 2 that faces the outer surface of the water pipe K (the lower surface of the drain body 2 in Figure 3). The sealing material 1 and the masking material 7 may be integrated with the drain body 2 by a lining.

[0055] (F) In the above embodiment, the fastener 4 is removed, but the fastener 4 may be left in place without being removed. This makes it possible to improve the fixing strength of the drain body 2 to the water pipe K.

[0056] (G) In the above embodiment, the guide plate 52 has a magnet 52a, but is not limited thereto. For example, the guide plate 52 may not have a magnet 52a, and the guide plate 52 may be fixed to the water pipe K with a fixing means such as tape. In the above embodiment, the magnetic sheet 51 itself is a magnet, but is not limited thereto. The magnetic sheet 51 may be changed to a sheet that does not have a magnet, and the sheet may be fixed to the water pipe K with a fixing means such as tape.

[0057] [1] As in the above embodiment, the method for repairing a fluid pipe may include the steps of: pressing a drain body 2 against the water pipe K (fluid pipe) via a sealing material 1 surrounding a leak hole K1 of the water pipe K (fluid pipe) so that water leaking from the leak hole K1 is discharged from the discharge passage 20 of the drain body 2; forming a space SP1 for filling with adhesive 6 on the outer circumference of the sealing material 1 using a masking material 7 arranged on the outer circumference of the sealing material 1; filling the space SP1 with adhesive 6 through at least one filling passage 24 connecting the inside and outside of the space SP1; and hardening the adhesive 6 filled in the space SP1 to fix the drain body 2 to the water pipe K (fluid pipe). In this way, a space SP1 for filling with adhesive 6 is formed by the masking material 7 and the adhesive 6 is filled into the space SP1, so that even if the viscosity of the adhesive 6 is low, it is possible to suppress the adhesive 6 from flowing down from the desired position and it is easier to ensure the adhesive strength of the adhesive 6.

[0058] [2] The method for repairing a fluid pipe as described in [1] above, which may include the step of removing water from the space SP1 before performing the step of filling the space SP1 with adhesive 6. This method makes it possible to remove water that inhibits the curing of adhesive 6, and makes it easier to ensure adhesive strength.

[0059] [3] A method for repairing a fluid pipe as described in [1] or [2] above, wherein at least one filling passage 24 includes a passage formed in the drain body 2. If the filling passage 24 is formed in the drain body 2, the filling passage 24 is often positioned in front of the worker, which improves work efficiency.

[0060] [4] A method for repairing a fluid pipe as described in any of [1] to [3] above, wherein a plurality of filling passages 24 are provided. If a plurality of filling passages 24 are provided, the adhesive 6 can be filled from the first filling passage 24, and the filling of the adhesive 6 can be stopped after confirming that the adhesive 6 is exposed from the second filling passage 24, thereby making the filling of the adhesive 6 easier. It is also possible to fill the adhesive 6 from a plurality of filling passages 24, making it easier to spread the adhesive 6 throughout the space SP1. Furthermore, it is possible to improve the efficiency of water removal in the step of removing water from the space SP1.

[0061] [5] A method for repairing a fluid pipe as described in any of [1] to [4] above, wherein the adhesive 6 is also filled into at least one filling passage 24. With this configuration, the area to which the adhesive 6 adheres can be increased compared to when the adhesive 6 is not filled into the filling passage 24, making it easier to ensure adhesive strength. In addition, since the filling passage 24 is closed, deterioration and corrosion of the drain body 2 from the outside can be suppressed.

[0062] [6] A method for repairing a fluid pipe as described in any of [1] to [5] above, which includes the step of adsorbing and fixing a pair of magnet parts 40 associated with a drain body 2 at a fixed position P1 on a virtual line parallel to the pipe axis direction AD and passing through the leak hole K1 on the outer surface of the water pipe K (fluid pipe), and pressing the drain body 2 against the water pipe K (fluid pipe) with the adsorption force of the pair of magnet parts 40. By arranging the pair of magnet parts 40 on a virtual line parallel to the pipe axis direction AD and passing through the leak hole K1, it becomes possible to accurately press the drain body 2 against the water pipe K with the pair of magnet parts 40.

[0063] [7] A method for repairing a fluid pipe as described in [6] above, which may include the steps of: fixing guide members (magnet sheet 51, guide plate 52) to the outer surface of the water pipe K (fluid pipe); and guiding the pair of magnet parts 40, the drain body 2, or a member associated with the drain body 2 (pressure device 41) with the guide members (magnet sheet 51, guide plate 52) to position the pair of magnet parts 40 at a fixed position P1. By using guide members (magnet sheet 51, guide plate 52) in this way, it is possible to facilitate the work of positioning the pair of magnet parts 40 at a fixed position P1.

[0064] [8] A method for repairing a fluid pipe as described in [7] above, which may include the steps of: attaching a marking M1 to the outer surface of the water pipe K (fluid pipe) parallel to the pipe axis direction AD and passing through a leak hole K1; and fixing the guide members (magnetic sheet 51, guide plate 52) to the outer surface of the water pipe K (fluid pipe) by adsorption, such that the mark M5 (or mounting shaft 52b) attached to the guide members (magnetic sheet 51, guide plate 52) coincides with the marking M1. This makes it possible to easily position the guide members (magnetic sheet 51, guide plate 52) in the appropriate position.

[0065] [9] A method for repairing a fluid pipe as described in [7] or [8] above, wherein the guide member is a magnetic sheet 51, and the method includes the steps of: guiding a pair of magnetic parts 40 with a magnetic sheet 51 that is adsorbed and fixed to the outer surface of a water pipe K (fluid pipe) to adsorb and fix the pair of magnetic parts 40 to a fixed position P1; and attaching a drain body 2 to the pair of magnetic parts 40 that are adsorbed and fixed to the fixed position P1 via an attachment member (pressure tool 41), and pressing the drain body 2 against the water pipe K (fluid pipe). Since the guide member is an easy-to-handle magnetic sheet 51, the work can be made easier.

[0066]

[10] The method for repairing a fluid pipe as described in [9] above, wherein the magnetic sheet 51 is composed of a plurality of divided parts, and at least one of the plurality of divided parts has a recess 51a that opens the leak hole K1 when the plurality of divided parts are brought together. The magnetic sheet 51 can be attached and fixed to the water pipe K without being affected by water leakage from the leak hole K1.

[0067]

[11] A method for repairing a fluid pipe as described in [6] above, which may include the steps of inserting a guide rod member 54 into a leak hole K1, and positioning the pair of magnet parts 40 at a fixed position P1 with the guide rod member 54 inserted into the discharge passage 20 of the drain body 2. This is an example of positioning the pair of magnet parts 40 at a fixed position P1.

[0068]

[12] As in the above embodiment, the repair structure for the fluid pipe may also include: a sealing material 1 that surrounds a leak hole K1 formed on the outer surface of the water pipe K (fluid pipe); a drain body 2 having a discharge passage 20 that can discharge water leaking from the leak hole K1 to the outside, and the discharge passage 20 and the leak hole K1 are arranged in a state where they are watertightly connected via the sealing material 1; a closing member (drain plug 5, valved pipe 102, first plug 105, second plug 106) that closes the discharge passage 20; an adhesive 6 arranged on the outer surface of the sealing material 1 that adheres the outer surface of the water pipe K (fluid pipe) to the drain body 2; and a masking material 7 that covers the adhesive 6 from the outer surface of the adhesive 6. With this configuration, since the masking material 7 covers part or all of the adhesive 6 from the outer surface of the sealing material 1, exposure of the adhesive 6 to the external environment can be reduced or prevented, deterioration of the adhesive 6 can be suppressed, and weather resistance can be improved.

[0069]

[13] The repair structure for a fluid pipe described in

[12] above may be further provided, comprising a partitioning member 53 that divides the space SP1 between the sealing material 1 and the masking material 7 into a plurality of spaces (first space SP2, second space SP3), the drain body 2 has a plurality of filling passages 24 that pass through the inside of the drain body 2 and communicate with the plurality of spaces (first space SP2, second space SP3), and the adhesive 6 is filled into the plurality of spaces (first space SP2, second space SP3) and the plurality of filling passages 24. Even when the drain body 2 is difficult to see, such as when the drain body 2 is installed facing upward from below the water pipe K, or when the adhesive 6 must be injected against gravity from the filling passages 24, the adhesive 6 can be accurately filled.

[0070] Although embodiments of this disclosure have been described above with reference to the drawings, it should be understood that the specific configurations are not limited to these embodiments. The scope of this disclosure is indicated not only by the description of the embodiments above but also by the claims, and further includes all modifications within the meaning and scope equivalent to the claims.

[0071] The structures adopted in each of the above embodiments can be adopted in any other embodiment. The specific configuration of each part is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of this disclosure.

[0072] 1: Sealing material 2: Drain body 40: Magnet part 5: Drain plug (closing member) 51: Magnet sheet (guide member) 51a: Recess 52: Guide plate (guide member) 53: Partition member 54: Guide rod member 6: Adhesive 7: Masking material 20: Discharge passage 24: Filling passage 102: Valve pipe (closing member) 105: First plug (closing member) 106: Second plug (closing member) AD: Axial direction of pipe K: Water pipe (fluid pipe) K1: Leakage hole SP1: Space M1: Marking M5: Mark P1: Fixing position

Claims

1. A method for repairing a fluid pipe, comprising the steps of: pressing a drain body against the fluid pipe via a sealing material surrounding a leak hole in the fluid pipe, so that water leaking from the leak hole is discharged through the drain body's discharge channel; forming a space for filling with adhesive on the outer circumference of the sealing material using a masking material positioned on the outer circumference of the sealing material; filling the space with adhesive through at least one filling channel connecting the inside and outside of the space; and curing the adhesive filled in the space to fix the drain body to the fluid pipe.

2. A method for repairing a fluid pipe according to claim 1, comprising the step of removing water from the space before performing the step of filling the space with the adhesive.

3. The method for repairing a fluid pipe according to claim 1, wherein the at least one filling passage includes a passage formed in the drain body.

4. The method for repairing a fluid pipe according to claim 1, wherein a plurality of filling passages are provided.

5. The method for repairing a fluid pipe according to claim 1, wherein the adhesive is also filled into at least one of the filling passages.

6. A method for repairing a fluid pipe according to claim 1, comprising the step of adsorbing and fixing a pair of magnets associated with the drain body at a fixed position on the outer surface of the fluid pipe at a fixed position on a virtual line parallel to the pipe axis direction and passing through the leakage hole, and pressing the drain body against the fluid pipe by the adsorption force of the pair of magnets.

7. A method for repairing a fluid pipe according to claim 6, comprising the steps of: fixing a guide member to the outer surface of the fluid pipe; and guiding the pair of magnet portions, the drain body, or a member associated with the drain body with the guide member to position the pair of magnet portions at the fixed position.

8. A method for repairing a fluid pipe according to claim 7, comprising the steps of: making a mark on the outer surface of the fluid pipe that is parallel to the axial direction of the pipe and passes through the leakage hole; and adhering and fixing the guide member to the outer surface of the fluid pipe so that the mark on the guide member coincides with the mark.

9. A method for repairing a fluid pipe according to claim 7 or 8, wherein the guide member is a magnetic sheet, and the method includes the steps of: guiding the pair of magnetic parts with the magnetic sheet which is adsorbed and fixed to the outer surface of the fluid pipe, thereby adsorbing and fixing the pair of magnetic parts to the fixed position; and attaching the drain body to the pair of magnetic parts which are adsorbed and fixed to the fixed position via a mounting member, thereby pressing the drain body against the fluid pipe.

10. The method for repairing a fluid pipe according to claim 9, wherein the magnetic sheet is composed of a plurality of divided parts, and at least one of the plurality of divided parts has a recess that opens the leakage hole when the plurality of divided parts are brought together.

11. A method for repairing a fluid pipe according to claim 6, comprising the steps of: inserting a guide rod member into the leakage hole; and positioning the pair of magnets in the fixed position, with the guide rod member inserted into the discharge passage of the drain body.

12. A repair structure for a fluid pipe, comprising: a sealing material that surrounds a leak hole formed on the outer surface of the fluid pipe; a drain body having a discharge passage capable of discharging water leaking from the leak hole to the outside, wherein the discharge passage and the leak hole are watertightly connected via the sealing material; a closing member that closes the discharge passage; an adhesive disposed on the outer surface of the sealing material that bonds the outer surface of the fluid pipe and the drain body; and a masking material that covers the adhesive from the outer surface of the adhesive.

13. A repair structure for a fluid pipe according to claim 12, comprising a partitioning member that divides the space between the sealing material and the masking material into a plurality of spaces, the drain body having a plurality of filling passages that pass through the inside of the drain body and communicate with each of the plurality of spaces, and the adhesive filling the plurality of spaces and the plurality of filling passages.

Images