Water leakage repair fitting and water leakage repair method

Abstract

A water leakage repair fitting is provided with: a first unit (1) having a fastening mechanism (4) and a plurality of metal strips (3) provided at intervals in the pipe circumferential direction of a fluid pipe (K), the fastening mechanism (4) fastening the pipe circumferential direction ends of the plurality of metal strips (3) to each other; a second unit (2) which is disposed adjacent to the first unit, and which is provided with a fastening mechanism (4) and a plurality of metal straps (3), the plurality of metal straps (3) being provided at intervals in the pipe circumferential direction of the fluid pipe (K), the fastening mechanism (4) fastening the ends of the plurality of metal straps (3) in the pipe circumferential direction to each other; and a first water stop piece (6) which is formed of an elastic body and extends from a first metal band (3 ') included in the first unit to a second metal band (3' ') included in the second unit in the axial direction (AD) of the tube. The length (L2) of the first water stop piece (6) in the pipe circumferential direction is smaller than the lengths of the first metal band (3 ') and the second metal band (3' ') in the pipe circumferential direction, and the first water stop piece (6) is pressed against the outer circumferential surface of the fluid pipe (K) by the first metal band (3') and the second metal band (3 '').

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202480061739.5 (22) Application Date 2024.03.28 (30) Priority Data 2023-167563 2023.09.28 JP (85) PCT International Application Entering National Phase Date 2026.03.26 (86) PCT International Application Application Data PCT / JP2024 / 012578 2024.03.28 (87) PCT International Application Publication Data WO2025 / 069507 JA 2025.04.03 (71) Applicant: Yokohama City, Address: Kanagawa Prefecture, Japan Applicant: Taisei K.K. Co., Ltd. (72) Inventors: Shingo Kagami, Hiroaki Okada, Takato Kitamura, Mitsuhiro Mori (74) Patent Agency: Longtian Intellectual Property Agency Co., Ltd. 72003 Patent Attorney: Xiaobao Song (51) Int.Cl. F16L 55 / 172 (2006.01) F16L 55 / 18 (2006.01) (54) Invention Title: Leak Repair Accessory and Leak Repair Method (57) Abstract: The leak repair accessory has: a first unit (1), having a fastening mechanism (4) and a plurality of metal strips (3), the plurality of metal strips (3) A plurality of metal strips (3) are spaced apart along the circumferential direction of the fluid conduit (K), and a fastening mechanism (4) fastens the circumferential ends of the metal strips (3) to each other; a second unit (2) has a fastening mechanism (4) and a plurality of metal strips (3), which are spaced apart along the circumferential direction of the fluid conduit (K), and the fastening mechanism (4) fastens the circumferential ends of the metal strips (3) to each other, and the second unit is arranged adjacent to the first unit; and a first water-stopping plate (6) is formed of an elastomer and extends along the pipe axis direction (AD) from the first metal strip (3') included in the first unit to the second metal strip (3'') included in the second unit. The circumferential length (L2) of the first water-stopping plate (6) is less than the circumferential length of the first metal strip (3') and the second metal strip (3''), and the first water-stopping plate (6) is pressed against the outer circumferential surface of the fluid conduit K by the first metal strip (3') and the second metal strip (3''). Claims 2 pages, Description 11 pages, Drawings 18 pages, CN 121909354 A 2026.04.21 CN 1 21 90 93 54 A 1. A leak repair fitting, installed on a leaking part of a fluid pipeline, wherein the leak repair fitting comprises: a first unit having a fastening mechanism and a plurality of metal strips, the plurality of metal strips being spaced apart along the circumferential direction of the fluid pipeline, the fastening mechanism fastening the circumferential ends of the plurality of metal strips to each other;The second unit comprises a fastening mechanism and a plurality of metal strips spaced apart along the circumferential direction of the fluid conduit. The fastening mechanism fastens the circumferential ends of the plurality of metal strips to each other. The second unit is arranged adjacent to the first unit. A first water-stop plate, formed of an elastomer, extends along the pipe axis from the first metal strip included in the first unit to the second metal strip included in the second unit. The circumferential length of the first water-stop plate is less than the circumferential lengths of the first and second metal strips. The first water-stop plate is pressed against the outer circumferential surface of the fluid conduit by the first and second metal strips. 2. The leak repair fitting according to claim 1, wherein a second water-stop plate is provided on the inner circumferential surface of each of the plurality of metal strips constituting the first unit and the second unit. 3. The leak repair fitting according to claim 1 or 2, wherein a metal plate is provided on the outer circumferential surface of the first water-stop plate. 4. The leak repair fitting according to claim 3, wherein the inner peripheral surface of the first water-stop sheet has a plurality of first recesses, and the outer peripheral surface of the first water-stop sheet, on which the outer peripheral surface of the metal plate is disposed, has second recesses corresponding to at least a portion of the plurality of first recesses, the second recesses being disposed only within the range overlapping with the first recesses when projected parallel to the pipe diameter direction. 5. The leak repair fitting according to claim 1, wherein the first metal strip and the second metal strip have markings indicating the position of the first water-stop sheet. 6. The leak repair fitting according to claim 2, wherein the outer peripheral surface of the first water-stop sheet forms a first concave-convex shape, and the inner peripheral surface of the second water-stop sheet forms a second concave-convex shape, the first concave-convex shape and the second concave-convex shape fitting together. 7. The leak repair fitting according to claim 6, wherein the first concave-convex shape extends from one end of the first water-stop sheet in the pipe circumferential direction to the other end. 8. The leak repair fitting according to claim 6, wherein a portion of the outer peripheral surface of the first water-stopping piece is provided with a metal plate, and the first concave-convex shape extends from one end to the other end in the circumferential direction of the outer peripheral surface of the first water-stopping piece where the metal plate is not provided. 9. The leak repair fitting according to claim 1, wherein the length of the first water-stopping piece in the axial direction is greater than the axial width of each of the first metal strip and the second metal strip. 10. A leak repair method for repairing a leak in a fluid pipeline, wherein, according to claim 1 / 2 page 2 CN 121909354 A, the leak repair method includes: arranging a plurality of metal strips constituting a first unit at intervals in the circumferential direction of the fluid pipeline, and using a fastening mechanism...The steps include: temporarily fastening the circumferential ends of the plurality of metal strips constituting the first unit to each other; temporarily fastening the circumferential ends of the plurality of metal strips constituting the second unit to each other using a fastening mechanism by arranging the plurality of metal strips constituting the second unit at intervals along the circumferential direction of the fluid pipe; positioning the first metal strip included in the first unit and the second metal strip included in the second unit adjacent to the first unit at a position covering the first water-stopping piece formed of an elastomer and used to cover the leak; and formally fastening the fastening mechanism of each of the first unit and the second unit. 11. The leak repair method according to claim 10, wherein the positioning is performed using a clamp that holds the first metal strip and the second metal strip from both sides in the pipe axis direction, and the formal fastening is performed while maintaining the positioning performed by the clamp. Claims 2 / 2 pages 3 CN 121909354 A Leak Repair Accessories and Leak Repair Method Technical Field

[0001] This disclosure relates to leak repair technology for fluid pipes such as tap water pipes. Background Art

[0002] Fluid pipes (such as water pipes) installed outdoors, such as water pipe bridges, sometimes leak due to corrosion. Devices for repairing fluid pipes in case of leaks are known (see Patent Document 1).

[0003] The leak repair fitting described in Patent Document 1 includes a metal strip wound around the leaking part of the fluid pipe, a fastening mechanism for fastening the metal strip, and a rubber sheet disposed on the inner circumference of the metal strip.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2023-013633 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] While the leak repair fitting disclosed in Patent Document 1 is suitable for repairing leaks such as pinholes, it is sometimes difficult to deal with leaks caused by cracks extending along the pipe axis.

[0009] This disclosure provides a leak repair technique capable of dealing with leaks caused by cracks extending along the pipe axis.

[0010] Means for Solving the Problem

[0011] The leak repair accessory of the present invention is a leak repair accessory installed on the leaking part of a fluid pipeline, wherein the leak repair accessory comprises: a first unit having a fastening mechanism and a plurality of metal strips, the plurality of metal strips being arranged at intervals along the circumferential direction of the fluid pipeline, the fastening mechanism fastening the circumferential ends of the plurality of metal strips to each other; a second unit having a fastening mechanism and a plurality of metal strips, the plurality of metal strips being arranged at intervals along the circumferential direction of the fluid pipeline, the fastening mechanism fastening the circumferential ends of the plurality of metal strips to each other.The second unit is configured adjacent to the first unit; and a first waterstop, formed of an elastomer, extends along the pipe axis from the first metal strip included in the first unit to the second metal strip included in the second unit, the circumferential length of the first waterstop being less than the circumferential length of the first metal strip and the second metal strip, the first waterstop being pressed against the outer circumferential surface of the fluid pipe by the first metal strip and the second metal strip.

[0012] FIG1 is a side view showing a leak repair fitting installed on a fluid pipe according to the first embodiment.

[0013] FIG2 is a cross-sectional view of part II-II in FIG1. ​​

[0014] FIG3 is a side view showing the metal strip installed in front of the fluid pipe and the second waterstop integrated with the metal strip.

[0015] FIG4 is a top view showing the metal strip.

[0016] FIG5 is a side view showing the metal strip.

[0017] FIG6 is a diagram of the second waterstop viewed from the inner circumferential side (inner side in the pipe diameter direction).

[0018] FIG7 is a cross-sectional view of the V-V portion in FIG6.

[0019] FIG8 is a view of the first waterstop plate viewed from the inner circumferential side (inner side in the pipe diameter direction).

[0020] FIG9 is a cross-sectional view of the IX-IX portion in FIG8.

[0021] FIG10 is a cross-sectional view of the X-X portion in FIG8.

[0022] FIG11 is a diagram showing the steps of a leak repair method using a leak repair fitting.

[0023] FIG12 is a diagram showing the steps of a leak repair method using a leak repair fitting.

[0024] FIG13 is a cross-sectional view of the XII-XII portion in FIG1. ​​

[0025] FIG14 is a diagram corresponding to FIG9 showing the first waterstop plate of the second embodiment.

[0026] FIG15 is a cross-sectional view showing the first waterstop plate and the second waterstop plate along the pipe axis direction and the pipe diameter direction.

[0027] FIG16 is a cross-sectional view of the XVI-XVI portion in FIG15.

[0028] FIG17 is a top view showing the first water-stopping plate and the first metal plate bonded to the outer peripheral surface of the first water-stopping plate, viewed along a line of sight parallel to the pipe diameter.

[0029] FIG18 is a cross-sectional view of the XVIII-XVIII portion in FIG17. Detailed Embodiments

[0030] <First Embodiment>

[0031] Hereinafter, a leak repair fitting and a leak repair method according to the first embodiment of the present invention will be described with reference to the accompanying drawings.

[0032] As shown in FIG1 and FIG2, the leak repair fitting is installed on the leaking part K1 of a fluid pipe K such as a tap water pipe. The leak repair fitting of the first embodiment stops the leaking part K1 formed by a crack extending along the pipe axis AD of the fluid pipe K. Such cracks sometimes appear at the welded part of the fluid pipe K extending along the pipe axis AD. The leak repair fitting packageThe system includes a first unit 1, a second unit 2 adjacent to the first unit 1, and a first water-stopping plate 6 for stopping the leakage in the K1. The first unit 1 has a plurality of metal strips 3, a fastening mechanism 4, and a second water-stopping plate 5. The second unit 2 has a plurality of metal strips 3, a fastening mechanism 4, and a second water-stopping plate 5. Although the first unit 1 and the second unit 2 are positioned differently relative to the fluid pipe K, the structures of the metal strips 3, fastening mechanisms 4, and second water-stopping plates 5 constituting each unit are the same.

[0033] The term "accessory" in the context of leak repair accessories is intended to indicate that the plurality of metal strips 3 are made of metal, and does not imply that other components, such as the water-stopping plate, are made of metal.

[0034] <Metal strip 3>

[0035] The plurality of metal strips 3 are arranged at intervals along the circumferential direction CD of the fluid pipe K. As shown in Figures 3, 4, and 5, each metal strip 3 has an annular portion 30 at both ends in the circumferential direction CD. The annular portion 30 is formed by bending a metal plate and welding the top ends 31 of the metal plate on both sides in the pipe circumferential direction CD to the metal plate. In the embodiments shown in Figures 3, 4, and 5, the metal strip 3 is configured with the welded top ends 31 of the metal plate positioned inside the pipe diameter direction RD2. When the metal plate is bent to form the annular portion 30, the welded portion P11 of the top end 31 of the metal plate tends to float outward in the pipe diameter direction RD1. If the welded top end 31 of the metal plate is located inside the pipe diameter direction RD2, it is easier to press the water-stop rubber inside the pipe diameter direction RD2 with the thickened portion of the top end 31 compared to the case where it is located outside the pipe diameter direction RD1. As shown in Figure 5, the annular portion 30 has a plurality of pairs of openings 30s for inserting bolts 41 and nuts 42. The openings 30s open outward in the pipe diameter direction RD1 and outward in the pipe circumferential direction. Although two pairs of openings 30s are formed in this embodiment, the number of pairs of openings 30s can be appropriately changed according to the dimensions of the tube axis AD of the metal strip 3. Specification 2 / 11 page 5 CN 121909354 A

[0036] The metal strip 3 is made of metal. In this embodiment, the metal strip 3 is made of SUS (stainless steel). Although there is no particular limitation, if it is SUS, it is preferable that the thickness of the metal plate constituting the metal strip 3 is 1.0 mm or more and 1.5 mm or less. In this embodiment, it is 1.2 mm. If the thickness of the metal plate is less than 1.0 mm, the metal strip 3 will elongate when the fastening mechanism 4 is tightened to apply a tensile load to the metal strip 3, and the second water stop 5 cannot be properly compressed. If the thickness of the metal plate exceeds 1.5 mm, it is difficult to bend the metal strip 3 by hand and it is difficult to bend the metal strip 3 into a shape that matches the fluid pipe K.

[0037] <Fastening Mechanism 4>

[0038] The fastening mechanism 4 fastens the circumferential ends of a plurality of metal strips 3 to each other. The fastening mechanism 4 includes bolts 41 andNut 42. As shown in FIG2, the fastening mechanism 4 has: a rotating shaft 40, which is inserted through the annular portion 30 and can rotate within the annular portion 30; a bolt 41 and a nut 42, which fasten the rotating shaft 40 to each other. The rotating shaft 40 is configured to rotate within the annular portion 30 of the metal strip 3. Thus, even if the distance between the annular portions 30 changes due to different installation positions of the metal strip 3, or if the metal strip 3 is used for various fluid pipes K with different radial dimensions, even if the outer circumferential surface of the fluid pipe K has arbitrary curvature, since the rotating shaft 40 can rotate, only the force parallel to the bolt axis can act on the bolt 41 and the nut 42, thereby the metal strip 3 can press the second water-stop plate 5 evenly in the entire circumferential direction CD.

[0039] <First water-stop plate 6>

[0040] The first water-stop plate 6 is formed of an elastomer such as rubber. In FIG1, since the first water-stop plate 6 and the first metal plate 7 described later are obscured by the metal strip 3, the first water-stop plate 6 and the first metal plate 7 are shown in shaded areas. As shown in Figure 1, the first waterstop 6 extends along the pipe axis direction AD from the first metal strip 3' included in the first unit 1 to the second metal strip 3'' included in the second unit 2. The first metal strip 3' is the metal strip 3 used to press the first waterstop 6 among the plurality of metal strips 3 included in the first unit 1. The second metal strip 3'' is the metal strip 3 used to press the first waterstop 6 among the plurality of metal strips 3 included in the second unit 2. The first metal strip 3' and the second metal strip 3'' are adjacent to each other in the pipe axis direction AD. The rubber hardness of the first waterstop 6 is preferably 50 degrees or more and 80 degrees or less. The rubber hardness is the hardness measured using a type C hardness tester at 23°C based on the Japanese JIS K7312 measurement method.

[0041] As shown in Figures 1, 4-5, and 8, the pipe circumferential length L2 of the first waterstop 6 is less than the pipe circumferential length CD of the metal strips 3 that serve as the first metal strip 3' and the second metal strip 3''. As shown in Figure 4, the metal strip 3, which becomes the first metal strip 3' and the second metal strip 3'', has a mark 33 indicating the placement position of the first water-stopping piece 6. In the first embodiment, the mark 33 is a triangular mark, indicating that the first water-stopping piece 6 is placed in the indication area Ar2 sandwiched by a plurality of marks 33. The indication area Ar2 is the middle area when the length L1 of the metal strip 3 along the pipe circumferential direction CD is trisected. Therefore, the mark 33 only needs to indicate that the first water-stopping piece 6 is placed in all or part of the indication area Ar2, and the mark 33 is not limited to a triangular mark. If the first water-stopping piece 6 deviates from the indication area Ar2, the metal strip 3 will not press the first water-stopping piece 6 sufficiently, and it will be unable to properly stop the leakage part K1.

[0042] As shown in Figures 8 to 10, the inner circumferential surface 6a of the first water-stopping piece 6 has: a plurality of first ribs 61, along a first direction(In the first embodiment, this is the pipe circumferential direction CD) extending; a plurality of second ribs 62 extending along a second direction intersecting the first direction (in the first embodiment, this is the pipe axis direction AD); a plurality of first recesses 64. The first ribs 61 and the second ribs 62 protrude further inward in the pipe diameter direction RD2 than the bottom 64s of the first recesses 64. The first recesses 64 are formed by the plurality of first ribs 61 and the plurality of second ribs 62. The plurality of first ribs 61 and the plurality of second ribs 62 form a grid. One grid cell forming the grid becomes a first recess 64. In this embodiment, the shape of the first recesses 64 viewed from the inner side RD2 in the pipe diameter direction is rectangular (square), and the first recesses 64 appear as cuboids when viewed in three dimensions, but are not limited to this; for example, they may also be rhomboid, circular, or elliptical.

[0043] The width of the first ribs 61 and the second ribs 62 is preferably 1 mm or more in order to withstand water pressure. In the embodiment described on page 3 / 11 of the first specification, CN 121909354 A, the width of the first rib 61 and the second rib 62 is 2.5 mm, but it is not limited to this value.

[0044] As shown in Figures 9 and 10, the inner circumferential surfaces of the first rib 61 and the second rib 62 are formed with micro protrusions 65 with a width and protrusion height of 0.75 mm or less, but the micro protrusions 65 can be omitted. Alternatively, micro depressions with a width and depth of 0.75 mm or less can be formed instead of micro protrusions 65. By providing micro protrusions 65 or micro depressions, micro-irregularities such as rust or corrosion generated on the pipe surface can be absorbed.

[0045] As shown in Figures 9 and 10, a first metal plate 7 is disposed on the outer circumferential surface 6b of the first waterstop 6. The first metal plate 7 covers the entire outer circumferential surface 6b of the first waterstop 6 and is bonded to the first waterstop 6. Therefore, even if the first water-stopping piece 6 is positioned in the gap between the first metal strip 3' and the second metal strip 3'', the first metal plate 7, pressed by the first metal strip 3' and the second metal strip 3'', can still appropriately press the first water-stopping piece 6 to stop the leakage at the leaking part K1.

[0046] As shown in Figures 8 and 9, the outer end 6e of the first water-stopping piece 6 in the pipe axis direction AD is located further inside the pipe axis direction AD than the outer end 7e of the first metal plate 7. This is because when the first water-stopping piece 6 is pressed by the pipe diameter direction RD and the pressure of the leaking water, and is about to deform outward in the pipe axis direction AD, the first metal plate 7 can support the first water-stopping piece 6 and suppress the deformation of the first water-stopping piece 6.

[0047] As shown in Figure 10, the ends 6c and 6d of the first water-stopping piece 6 in the pipe circumferential direction CD are both formed into a tapered shape. As a result, after installation into the pipe, the step or gap between the first water-stopping piece 6 and the pipe can be reduced, and the exposure of the pipe outside the leaking part can be suppressed. The first water-stopping plate 6 has: tapered ends 6c and 6d, located on both sides of the pipe circumferential direction CD; and a middle...Part 6f is located between the tapered ends 6c and 6d. The maximum thickness of the second water-stopping piece 5 in the middle part 6f is constant. In order to achieve the water-stopping performance, preferably, the thickness from the inner circumferential surface of the second water-stopping piece 5 to the inner circumferential surface of the first water-stopping piece 6 in the middle part 6f is at least 5 mm.

[0048] <Second water-stopping piece 5>

[0049] The second water-stopping piece 5 is formed of an elastomer such as rubber. The rubber hardness of the second water-stopping piece 5 is preferably 60 degrees or more and 80 degrees or less. As shown in Figures 2 and 3, the second water-stopping piece 5 is provided on the inner circumferential surface 3a of each of the plurality of metal strips 3. In this embodiment, the second water-stopping piece 5 is installed on the inner circumferential surface 3a of the metal strip 3 by an adhesive (not shown). As shown in Figure 2, when the plurality of metal strips 3 are connected into a ring by the fastening mechanism 4, the fastening mechanism 4 is fastened, thereby pressing the second water-stopping piece 5 against the outer circumferential surface K2 of the fluid pipe K. Thus, the second water-stop 5 seals the metal strip 3 between the outer peripheral surface K2 of the fluid pipe K, preventing leakage from the fluid pipe K even if a new leakage occurs at a location other than where the first water-stop 6 is located. Furthermore, since the second water-stop 5 is located on the inner peripheral surface of the metal strip 3, corrosion caused by contact between different types of metals can be prevented. A plurality of second water-stops 5 cover the entire circumferential direction CD.

[0050] As shown in FIG3, both sides of the circumferential end portions 5c and 5d of the second water-stop 5 are formed into a tapered shape. This allows two second water-stops 5 to be adjacent in the circumferential direction CD, with the circumferential end portion 5d of one second water-stop 5 overlapping the circumferential end portion 5c of the other, thereby preventing a step-like change in the thickness of the second water-stop 5. As a result, the outer peripheral surface of the fluid pipe K can be pressed as evenly as possible.

[0051] As shown in FIG. 3, a second metal plate 32 is disposed on the outer peripheral side (outer side RD1 in the pipe diameter direction) of the second waterstop 5. The second metal plate 32 is configured such that when fastened by the fastening mechanism 4, it is positioned between two adjacent metal strips 3 in the pipe circumferential direction CD. The second metal plate 32 is embedded in and bonded to the corresponding recess of the second waterstop 5. The second metal plate 32 is provided to press the second waterstop 5 located between the metal strips 3. Preferably, the second metal plate 32 overlaps with the line connecting the center of the rotating shaft 40 and the fluid pipe K. Thus, the fastening force can be appropriately transmitted to the second waterstop 5 by the fastening mechanism 4, thereby improving the sealing effect.

[0052] As shown in Figures 6 and 7, the inner circumferential surface 5a of the second waterstop 5 has: a plurality of third ribs 51 extending along the pipe circumferential direction; a plurality of fourth ribs 52 extending along the pipe axis direction; and a plurality of third recesses 54.Part 52 protrudes further inward toward the inner side RD2 in the pipe diameter direction than the bottom 54s of the third recess 54. A plurality of third recesses 54 are formed by a plurality of third ribs 51 and a plurality of fourth ribs 52. The plurality of third ribs 51 and the plurality of fourth ribs 52 form a grid. One grid cell forming the grid becomes a third recess 54. In this embodiment, the shape of the third recess 54 viewed from the inner side RD2 in the pipe diameter direction is rectangular (square), and the third recess 54 is cuboid when viewed in three dimensions, but it is not limited to this. For example, it may also be rhomboid, circular or elliptical.

[0053] As shown in Figures 6 and 7, the plurality of third ribs 51 includes an outermost rib 53 located at the outermost AD1 in the pipe axis direction. The outer end 53e of the outermost rib 53 in the pipe axis direction is located further inward toward the inner side AD2 in the pipe axis direction than the outer end 3e of the metal strip 3 in the pipe axis direction. To withstand water pressure, the axial dimension D1 of the third rib 51 and the outermost rib 53 is preferably 1 mm or more. In this embodiment, D1 is 2.5 mm, but it is not limited to this value.

[0054] In addition, if the outermost rib 53 deforms outward AD1 due to water pressure, to ensure that the deformed outermost rib 53 does not protrude from the second waterstop 5, preferably, the outer end 53e of the outermost rib 53 is located further inward AD2 than the outer end 5e of the second waterstop 5. The axial dimension D3 from the outer end 53e of the outermost rib 53 to the outer end 5e of the second waterstop 5 is preferably 1 / 2 or more of the axial dimension D1 of the outermost rib 53.

[0055] Furthermore, as shown in FIG7, minute protrusions 55 with a width and protrusion height of 0.75 mm or less are formed on the inner peripheral surfaces of the third rib 51 (including the outermost rib 53) and the fourth rib 52, but the minute protrusions 55 may be omitted. Alternatively, minute depressions with a width and depth of 0.75 mm or less may be formed instead of the minute protrusions 55. By providing minute protrusions 55 or minute depressions, minute irregularities such as rust or corrosion generated on the pipe surface can be absorbed.

[0056] As shown in FIG7, a fourth depression 56 is formed on the outer peripheral surface 5b of the second waterstop 5, corresponding to at least a portion of the third depressions 54 among the plurality of third depressions 54. The fourth depression 56 is only disposed within the range Ar1 that overlaps with the third depressions 54 when projected parallel to the pipe diameter direction RD. If the fourth recess 56 is located outside the aforementioned range Ar1, the support of the third rib 51 or the fourth rib 52 becomes weaker, and therefore, the third rib 51 or the fourth rib 52 cannot properly press the outer peripheral surface K2 of the fluid pipe K. The fourth recess 56 of this embodiment appears circular when viewed along a line of sight parallel to the pipe diameter direction RD, and cylindrical when viewed in three dimensions, but is not limited to this. For example, when viewed along a line of sight parallel to the pipe diameter direction RD, the fourth recess 56 may also appear rectangular, similar to the third recess 54.

[0057] As shown in Figure 3, the second water-stopping piece 5 has: pipe-circumferential end portions 5c and 5d formed in a tapered shape; and an intermediate portion 5f located between the pipe-circumferential end portions 5c and 5d. The maximum thickness of the second water-stopping piece 5 located in the intermediate portion 5f is constant.

[0058] <Leakage Repair Method>

[0059] The assembly process (repair method) of the leakage repair accessories is briefly described.

[0060] First, as shown in the upper part of Figure 11, when leakage W occurs from the leakage portion K1 of the fluid pipe K, a plurality of metal strips 3 constituting the first unit 1 are arranged at intervals along the pipe-circumferential direction CD of the fluid pipe K. The plurality of metal strips 3 constituting the first unit 1 are positioned offset from the leakage portion K1 along the pipe axis direction AD to avoid being subjected to the water pressure of the water sprayed from the leakage portion K1.

[0061] Next, the pipe-circumferential end portions of the plurality of metal strips 3 constituting the first unit 1 are temporarily fastened to each other by the fastening mechanism 4 (temporary fixing of bolts 41 and nuts 42).

[0062] Next, a first water-stopping plate 6 for covering the leaking part K1 is inserted between the first metal strip 3' constituting the first unit 1 and the fluid pipe K. In the first embodiment, the first water-stopping plate 6 and the first metal plate 7 are bonded together.

[0063] Next, as shown in the lower part of FIG11, a plurality of metal strips 3 constituting the second unit 2 are arranged at intervals along the circumferential direction CD of the fluid pipe K. The second metal strip 3'' constituting the second unit 2 is positioned to cover the first water-stopping plate 6. The circumferential ends of the plurality of metal strips 3 constituting the second unit 2 are temporarily fastened by the fastening mechanism 4 (temporary fixing of bolts 41 and nuts 42).

[0064] Next, as shown in FIG12, after the fastening mechanism 4 constituting the first unit 1 and the second unit 2 has completed the temporary fastening, the first unit 1 and the second unit 2 are offset along the pipe axis direction AD, and the first water-stopping plate 6 moves to the position covering the leaking part K1.

[0065] Next, the first metal strip 3' and the second metal strip 3'' are positioned to cover the first water-stopping sheet 6, which is positioned to cover the leaking part K1. This is because when the first unit 1 and the second unit 2 move along the pipe axis direction AD, a gap may occur between the first unit 1 and the second unit 2, and the gap between the first unit 1 and the second unit 2 should be eliminated as much as possible. If the gap between the first unit 1 and the second unit 2 is too large, the gap may result in insufficient pressure on the first water-stopping sheet 6, and proper water-stopping cannot be achieved.

[0066] To achieve precise positioning, as shown in FIG12, it is preferable to use a clamp 8 to clamp the first metal strip 3' and the second metal strip 3'' from both sides of the pipe axis direction AD to perform the above positioning. FIG12 includes a diagram showing the positional relationship between the clamp 8 and the metal strip 3.A schematic enlarged cross-sectional view viewed along the tube axis AD. The clamp 8 has: a pair of pressing members 80 that clamp the first metal strip 3' and the second metal strip 3'' from both sides of the tube axis AD; and a connecting member 81 that extends along the tube axis AD and can fasten the pair of pressing members 80. By fastening the pair of pressing members 80 to the connecting member 81, the spacing between the pair of pressing members 80 is reduced. Thus, the pair of pressing members 80 can press the first metal strip 3' and the second metal strip 3'' together in a direction that brings them closer together. In order to prevent the first water-stopping plate 6 from protruding from the metal strip 3, the clamp 8 is preferably positioned to cover the first water-stopping plate 6. Furthermore, the clamp 8 is preferably positioned to clamp the first water-stopping plate 6 from both sides of the tube axis AD.

[0067] Next, while held in position by the clamp 8, the fastening mechanisms 4 of the first unit 1 and the second unit 2 are formally fastened. Thus, the first water-stopping plate 6 stops the leakage at the leaking part K1.

[0068] Figure 13 is a cross-sectional view of the XII-XII section in Figure 1. As shown in Figure 13, the leak in the fluid pipe K caused by the crack is stopped by the first water-stopping plate 6. A first metal plate 7 is bonded to the outer peripheral surface of the first water-stopping plate 6. The first metal strip 3' constituting the first unit 1 and the second metal strip 3'' constituting the second unit 2 press the first metal plate 7 through the second water-stopping plate 5. The first metal plate 7 presses the entire first water-stopping plate 6 against the outer peripheral surface K2 of the fluid pipe K. The first unit 1 is disposed on the first side AD3 in the pipe axis direction AD, and the second unit 2 is disposed on the second side AD4 in the pipe axis direction AD. The end of the first water-stopping plate 6 on the first side AD3 in the pipe axis direction AD is located closer to the first side AD3 than the fourth rib 52 of the second water-stopping plate 5 that is closest to the second side AD4 in the pipe axis direction AD. The end of the second side AD4 of the first water-stop plate 6 in the tube axis direction AD is located further to the second side AD4 than the fourth rib 52 of the first side AD3 in the tube axis direction AD of the second water-stop plate 5 of the second metal strip 3''. Therefore, the first water-stop plate 6 can be properly pressed by using the plurality of fourth ribs 52 respectively provided on the second water-stop plates 5 of the first metal strip 3' and the second metal strip 3''.

[0069] As shown in FIG13, the length of the first water-stop plate 6 in the tube axis direction AD is greater than the width of the tube axis direction AD of the first metal strip 3' and the second metal strip 3''. It can cope with the leakage of the leakage part K1 whose width is greater than the width of the metal strip 3 in the tube axis direction AD. The length of the first water-stop plate 6 in the tube axis direction AD is preferably a length corresponding to a multiple of the metal strip 3. It can improve the aesthetics and workability.

[0070] In addition, the leakage repair accessory of this embodiment is particularly suitable when the length of the leakage part K1 in the tube axis direction AD is greater than the width of the metal strip 3 in the tube axis direction AD.

[0071] <Second Embodiment>

[0072] The leak repair fitting according to the second embodiment of the present invention will be described. The difference between the second embodiment and the first embodiment is that the first water-stop plate 6 is provided with a second recess 66. Specification 6 / 11 pages 9 CN 121909354 A

[0073] FIG14 is a diagram showing the first water-stop plate 6 of the second embodiment corresponding to FIG9. As shown in FIG14, a second recess 66 corresponding to at least a portion of the plurality of first recesses 64 is formed on the outer peripheral surface 6b of the first water-stop plate 6. The second recess 66 is only disposed within the range Ar3 that overlaps with the first recess 64 when projected parallel to the pipe diameter direction RD. If the second recess 66 is located outside the above-mentioned range Ar3, the support of the first rib 61 or the second rib 62 is weakened, and therefore, the first rib 61 or the second rib 62 cannot properly press the outer peripheral surface K2 of the fluid pipe K. The second recess 66 of the second embodiment is circular when viewed along a line of sight parallel to the pipe diameter direction RD, and cylindrical when viewed in three dimensions, but is not limited to being circular. For example, when viewed along a line of sight parallel to the pipe diameter direction RD, the second recess 66 can also be rectangular like the first recess 64. In the second embodiment, the second recess 66, when viewed along a line of sight parallel to the pipe diameter direction RD, is smaller than the first recess 64. This enhances the pressing force of the first rib 61 or the second rib 62 on the outer peripheral surface K2 of the fluid pipe K.

[0074] The fastening mechanism 4 is tightened, reducing the diameter between the plurality of metal strips 3, and the first water-stop plate 6 is pressed against the outer peripheral surface K2 of the fluid pipe K. Water is an incompressible fluid; when each of the first recesses 64 is filled with water, the water becomes a resistance to the compression of the first rib 61 and the second rib 62 in the first water-stop plate 6. Since a second recess 66 is provided on the outer periphery of the first recess 64 (outer side RD1 in the pipe diameter direction), when the first water-stopping sheet 6 is compressed, the portion between the first recess 64 and the second recess 66 in the first water-stopping sheet 6 deforms outward RD1 in the pipe diameter direction. This allows compression while maintaining a constant volume in the first recess 64, thus easily preventing leakage even if the first recess 64 is filled with water.

[0075] When the first water-stopping sheet 6 is in its natural state (non-compressed state) without external force, the volume of each first recess (64) is preferably greater than or equal to the volume change of a second recess 66 when compressed by 1 mm in the pipe diameter direction RD. Furthermore, the volume of each second recess (66) is preferably greater than or equal to the volume change of a first recess 64 when compressed by 1.5 mm in the pipe diameter direction RD. This volume change can be approximately calculated by multiplying the bottom area of ​​the first recess 64 by the compression amount (1 mm to 1.5 mm).

[0076] <Third Embodiment>

[0077] A leak repair accessory according to a third embodiment of the present invention will be described. FIG15 shows the first water-stopping plate 106.Figure 15 shows a cross-sectional view of the second waterstop 105 along the pipe axis direction AD and the pipe diameter direction RD. Figure 16 is a cross-sectional view of the XVI-XVI portion in Figure 15.

[0078] The difference between the third embodiment and the first embodiment is that the first metal plate 7 bonded to the first waterstop 106 is omitted, and interlocking concave-convex shapes are provided on the first waterstop 106 and the second waterstop 105.

[0079] As shown in Figures 15 and 16, the second waterstop 105 is bonded to the inner circumferential surface of the first metal strip 3' constituting the first unit 1. The second waterstop 105 is bonded to the inner circumferential surface of the second metal strip 3'' constituting the second unit 2. No metal plate is bonded to the outer circumferential surface of the first waterstop 106.

[0080] A first concave-convex shape 106P is formed on the outer circumferential surface of the first waterstop 106. A second concave-convex shape 105P is formed on the inner circumferential surface of the second waterstop 105. The first concave-convex shape and the second concave-convex shape can interlock with each other. The relative movement of the first waterstop 106 relative to the second waterstop 105 along the pipe axis direction AD is restricted by the interlocking of the first and second concave-convex shapes.

[0081] In the third embodiment, the first concave-convex shape 106P is a convex portion extending parallel to the pipe circumferential direction CD, and the second concave-convex shape 105P is a concave portion extending along the pipe circumferential direction CD, but it is not limited thereto. For example, the first concave-convex shape 106P can be a concave portion, and the second concave-convex shape 105P can be a convex portion. A concave portion larger than the pipe circumferential direction CD of the first waterstop 106 and accommodating a portion of the first waterstop 105 is formed on the second waterstop 105. The second concave-convex shape 105P is formed by protruding from the bottom of the concave portion toward the first waterstop 106. The first concave-convex shape 106P extends from one end of the pipe circumferential direction CD of the first waterstop 106 to the other end. As a result, deformation of a portion of the first waterstop 106 along the pipe axis direction AD can be suppressed. In order to achieve the water-stopping performance of the specification page 7 / 11 10 CN 121909354 A, the thickness from the inner peripheral surface of the second water-stopping piece 105 to the inner peripheral surface of the first water-stopping piece 106 is preferably at least 3 mm.

[0082] <Fourth Embodiment>

[0083] The leakage repair accessory of the fourth embodiment of the present invention will be described. FIG17 is a top view showing the first water-stopping piece 206 and the first metal plate 7 bonded to the outer peripheral surface of the first water-stopping piece 206, viewed along a line of sight parallel to the pipe diameter direction RD. In FIG17, the first metal plate 7 is shaded. FIG18 is a cross-sectional view of the XVIII-XVIII portion in FIG17.

[0084] As shown in FIG17 and FIG18, the second water-stopping piece 205 is bonded to the inner peripheral surface of the first metal strip 3' constituting the first unit 1. The second water-stopping piece 205 is bonded to the inner peripheral surface of the second metal strip 3'' constituting the second unit 2. The outer peripheral surface of the first water-stopping piece 206 is...A first metal plate 7 is adhered to the peripheral surface. The first metal plate 7, adhered to the first waterstop 206, is not disposed on the entire outer peripheral surface of the first waterstop 206, but only on a portion of the outer peripheral surface of the first waterstop 206. The first metal plate 7 is disposed in the shaded area of ​​FIG. 17. As shown in FIG. 17, a first concave-convex shape 206P is formed in the portion Ar4 of the outer peripheral surface of the first waterstop 206 where the first metal plate 7 is not disposed. A second concave-convex shape 105P is formed on the inner peripheral surface of the second waterstop 105. The first and second concave-convex shapes can interlock. By interlocking the first and second concave-convex shapes, the movement of the first waterstop 206 relative to the second waterstop 205 along the pipe axis direction AD is restricted. The first concave-convex shape 206P in the portion Ar4 of the outer peripheral surface of the first waterstop 206 where the first metal plate 7 is not disposed extends from one end to the other in the pipe axis direction CD. Therefore, deformation of a portion of the first waterstop 206 along the pipe axis direction AD can be suppressed. In order to achieve the water-stopping performance, the thickness from the inner circumferential surface of the second water-stopping piece 205 to the inner circumferential surface of the first water-stopping piece 206 is preferably at least 3 mm.

[0085] Furthermore, in the fourth embodiment, the first concave-convex shape 206P is a concave portion extending parallel to the pipe circumferential direction CD, and the second concave-convex shape 205P is a convex portion extending along the pipe circumferential direction CD, but it is not limited thereto. For example, the first concave-convex shape 206P can be a convex portion, and the second concave-convex shape 205P can be a concave portion.

[0086] <Modification>

[0087] (A) In the above embodiment, the first unit 1 and the second unit 2 are first arranged at a position offset from the leaking part K1 along the pipe axis direction AD and not covering the leaking part K1. Then, the first unit 1 and the second unit 2 are moved along the pipe axis direction AD. However, it is not limited thereto, and the first unit 1, the second unit 2, and the first water-stopping piece 6 may not be moved along the pipe axis direction AD. For example, the first water-stopping plate 6 can be positioned to cover the leaking part K1, and the metal strips 3 of the first unit 1 and the second unit 2 can be positioned to cover the first water-stopping plate 6. The fastening mechanism 4 can be temporarily tightened, and the first metal strip 3' and the second metal strip 3'' can be clamped from both sides in the pipe axis direction AD using the clamp 8. With the clamp 8 in the positioning state, the fastening mechanisms 4 of the first unit 1 and the second unit 2 can be formally tightened.

[0088] In addition, as another example, the metal strip 3 constituting the first unit 1 can be positioned to cover the leaking part K1 and the fastening mechanism can be temporarily tightened. The first water-stopping plate 6 can be positioned between the metal strip 3 of the first unit 1 and the fluid pipe K and cover the leaking part K1. The metal strip 3 constituting the second unit 2 can be positioned to cover the first water-stopping plate 6 and temporarily tightened. The fastening mechanisms 4 of the first unit 1 and the second unit 2 can be formally tightened.

[0089] That is, as long as the step of positioning the first metal strip 3' and the second metal strip 3'' to cover the first water-stopping sheet 6 is performed first, and then the step of formally fastening the fastening mechanism 4 of the first unit 1 and the second unit 2 is performed. The order of the temporary fastening step of the fastening mechanism 4 of the first unit 1 and the second unit 2, the configuration step of the first unit 1, the configuration step of the second unit 2, and the configuration step of the first water-stopping sheet 6 performed before the above positioning step and fastening step are different.

[0090] (B) Although in the above embodiment, a second water-stopping sheet 5 is provided on the inner circumferential surface of the metal strip 3, if the first water-stopping sheet 6 can stop the leakage part K1, the second water-stopping sheet 5 can be omitted.

[0091] (C) In the above embodiment, the first water-stopping sheet 6 is integrally formed of an elastomer such as rubber, but it is not limited to this. For example, multiple sheet members can be bonded together to form the first water-stopping sheet 6.

[0092] (D) In ​​the first embodiment, the second water-stopping sheet 5 is fixed to the metal strip 3 by adhesive bonding, but it is not limited to this, and the second water-stopping sheet 5 may not be fixed to the metal strip 3.

[0093] (E) The annular portion 30 of the metal strip 3 is formed by bending and welding a metal plate, but it may also be formed by other methods.

[0094] (F) The welded top end 31 of the metal plate may be arranged in a position outside the pipe diameter RD1.

[0095] (G) In the above embodiment, a first recess 64 and a second recess 66 are formed in the first water-stopping sheet 6, and a third recess 54 and a fourth recess 56 are formed in the second water-stopping sheet 5. Although the water-stopping performance may be reduced, these recesses may be omitted.

[0096] (H) In the third and fourth embodiments, the protrusions constituting the first concave-convex shapes 106P, 206P and the second concave-convex shapes 105P, 205P extend parallel to the pipe circumferential direction CD. However, this is not limited as long as the movement of the first water-stop plate 106 relative to the second water-stop plate 105 along the pipe axis direction AD can be restricted.

[0097] (I) In the above embodiments, a method for installing a leak repair accessory when a leak W occurs in the leaking part K1 of the fluid pipe K is described as an example. However, "leaking part" is not limited to the installation of accessories when a leak W occurs. It also includes installing accessories on leaking parts (cracks) where the fluid pipe K is in a water-cut-off state after a leak occurs.

[0098] [1]

[0099] As described above, although not particularly limited, as in the first to fourth embodiments, the leak repair fitting installed on the leaking part K1 of the fluid pipe K may have: a first unit 1 having a fastening mechanism 4 and a plurality of metal strips 3, the plurality of metal strips 3 being arranged at intervals along the circumferential direction CD of the fluid pipe K, and the fastening mechanism 4 fastening the plurality of metal strips 3 around the circumferential direction CD of the fluid pipe K.The ends of the two metal strips are fastened to each other in the direction of the fluid pipe K; the second unit 2 has a fastening mechanism 4 and a plurality of metal strips 3, which are spaced apart along the circumferential direction CD of the fluid pipe K. The fastening mechanism 4 fastens the ends of the plurality of metal strips 3 in the circumferential direction to each other. The second unit is arranged adjacent to the first unit; and the first water-stop plate 6 is formed of an elastomer and extends along the pipe axis direction AD from the first metal strip 3' included in the first unit to the second metal strip 3'' included in the second unit. The circumferential length L2 of the first water-stop plate 6 is less than the circumferential length L1 of the first metal strip 3' and the second metal strip 3''. The first water-stop plate 6 is pressed against the outer circumferential surface K2 of the fluid pipe K by the first metal strip 3' and the second metal strip 3''.

[0100] According to this structure, the first water-stop plate 6 can be used to deal with water leakage caused by cracks extending along the pipe axis direction AD.

[0101] [2]

[0102] According to the leak repair fitting described in [1] above, a second water-stopping plate 5 may also be provided on the inner circumferential surface of each of the plurality of metal strips 3 constituting the first unit 1 and the second unit 2.

[0103] According to this structure, even if a new leak occurs outside the location where the first water-stopping plate 6 is provided, leakage of the fluid pipe K can be prevented. In addition, since the second water-stopping plate 5 is provided on the inner circumferential surface of the metal strip 3, corrosion due to contact between different types of metals can be prevented.

[0104] [3]

[0105] According to the leak repair fitting described in [1] or [2] above, a first metal plate 7 may also be provided on the outer circumferential surface of the first water-stopping plate 6.

[0106] According to this structure, by pressing the first water-stopping plate 6 against the first metal strip 3' and the second metal strip 3', the first water-stopping plate 6 can be prevented from moving outward AD in the direction of the pipe axis, thereby improving the water-stopping performance. In addition, even if a gap is generated between the first metal strip 3' and the second metal strip 3', the first metal plate 7 can cover it, which can improve the water-stopping performance.

[0107] [4]

[0108] According to the leak repair accessory described in [3] above, the inner peripheral surface of the first water-stopping piece 6 may have a plurality of first recesses 64, and the outer peripheral surface of the first metal plate 7 is provided in the outer peripheral surface of the first water-stopping piece 6, having second recesses 66 corresponding to at least a portion of the first recesses 64 respectively, and the second recesses 66 are only disposed in the range that overlaps with the first recesses 64 when projected parallel to the pipe diameter direction RD.

[0109] According to this structure, since the second recess 66 formed on the outer peripheral surface of the first water-stopping sheet 6 is only disposed within the range Ar1 overlapping with the first recess 64, and the second recess 66 is not disposed at the position overlapping with the first rib 61 and the second rib 62, the water-stopping effect produced by the first rib 61 and the second rib 62 properly pressing the outer peripheral surface K2 of the fluid pipe K will not be impaired.As a result, since the second recess 66 is located on the outer periphery of the first recess 64, even if the first recess 64 is filled with water, the portion between the first recess 64 and the second recess 66 in the first water-stop plate 6 can be deformed outward RD1 in the pipe diameter direction. Through this deformation, even if the first recess 64 is filled with water, the first water-stop plate 6 can be compressed, avoiding compression resistance caused by water leakage, and the first water-stop plate 6 can be properly compressed to achieve a seal.

[0110] [5]

[0111] According to the water leakage repair fitting described in any one of [1] to [4] above, the first metal strip 3' and the second metal strip 3' may also have a mark 33, which indicates the position where the first water-stop plate 6 is arranged.

[0112] According to this structure, the first water-stop plate 6 can be installed in a state that can be properly compressed, regardless of the installer. In addition, the position of the first water-stop plate 6 can be visually confirmed after installation.

[0113] [6]

[0114] According to the leak repair fitting described in [2] above, a first concave-convex shape 106P may be formed on the outer peripheral surface of the first water-stopping piece 106, and a second concave-convex shape 105P may be formed on the inner peripheral surface of the second water-stopping piece 105, wherein the first concave-convex shape 106P and the second concave-convex shape 105P are fitted together.

[0115] According to this structure, the first water-stopping piece 106 can be prevented from moving outward in the pipe axis direction AD, thereby improving the water-stopping performance.

[0116] [7]

[0117] According to the leak repair fitting described in [6] above, the first concave-convex shape 106P may also extend from one end of the first water-stopping piece 106 in the pipe circumferential direction CD to the other end.

[0118] According to this structure, the leakage caused by the first water-stopping piece 106 shifting along the pipe axis direction AD can be reliably suppressed.

[0119] [8]

[0120] According to the leak repair fitting described in [6] above, a first metal plate 7 may also be provided on a portion of the outer peripheral surface of the first water-stopping piece 206, and the first concave-convex shape 206P extends from one end of the pipe circumferential direction CD to the other end in the portion Ar4 where the first metal plate 7 is not provided on the outer peripheral surface of the first water-stopping piece 206.

[0121] According to this structure, leakage caused by the first water-stopping piece 106 shifting along the pipe axis direction AD can be reliably suppressed.

[0122] [9]

[0123] According to the leak repair fitting described in any one of [1] to [8] above, the length of the pipe axis direction AD of the first water-stopping piece 6 may also be greater than the width of the pipe axis direction AD of each of the first metal strip 3' and the second metal strip 3'.

[0124] According to this structure, leakage of the leakage portion K1 with a width greater than the width of the pipe axis direction AD of the metal strip 3 can be addressed.

[0125]

[10]

[0126] Although not specifically limited, as in the above embodiments, the leak repair method may include: in the fluid pipe KThe steps include: 1) arranging a plurality of metal strips 3, spaced apart in the circumferential direction CD, to form a first unit 1; 2) temporarily fastening the circumferential ends of the plurality of metal strips 3 forming the first unit 1 to each other using a fastening mechanism 4; 3) arranging a plurality of metal strips 3, spaced apart in the circumferential direction CD, to form a second unit 2, to each other using a fastening mechanism 4; 4) positioning the first metal strip 3' included in the first unit 1 and the second metal strip 3 included in the second unit 2 adjacent to the first unit 1 (as described on page 10 / 11 of the specification, CN 121909354 A) to cover the position of the first water-stopping piece 6 formed of an elastomer and used to cover the leaking part K1; and 5) formally fastening the fastening mechanisms 4 of the first unit 1 and the second unit 2 respectively.

[0127]

[11]

[0128] According to the leak repair method described in

[10] above, a clamp 8 is used to hold the first metal strip 3' and the second metal strip 3'' from both sides of the pipe axis AD for positioning, and the clamp is then tightened while maintaining the positioning by the clamp 8.

[0129] The leak repair accessory can be installed appropriately.

[0130] According to any one of [1] to [9] above, the portion of the first metal strip 3' and the second metal strip 3'' that presses the first water-stopping piece 6 is a plate-shaped portion with a constant thickness. Using this plate-shaped portion, the first metal strip 3' and the second metal strip 3'' can be bent along the outer peripheral surface K2 of the fluid pipe K.

[0131] The embodiments of the present invention have been described above with reference to the accompanying drawings, but it should be understood that the specific structure is not limited to these embodiments. The scope of the present invention is defined not only by the description of the above embodiments but also by the claims, and includes all modifications having the same meaning and scope as the claims.

[0132] The structures used in the above embodiments can be applied to any other embodiments. The specific composition of each part is not limited to the above-described embodiments. Various modifications can be made as long as they do not deviate from the spirit of the present invention.

[0133] Explanation of reference numerals in the drawings

[0134] 1: First unit

[0135] 2: Second unit

[0136] 3: Metal strip

[0137] 3': First metal strip

[0138] 3'': Second metal strip

[0139] 4: Fastening mechanism

[0140] 5: Second water-stop plate

[0141] 6: First water-stop plate

[0142] 8: Clamp

[0143] 33: Mark

[0144] 64: First recess

[0145] 66: Second recess

[0146] 105, 205: Second water-stop plate

[0147] 105P, 205P: Second concave-convex shape

[0148] 106, 206: First water-stop plate

[0149] 106P, 206P: First concave-convex shape

[0150] AD: Pipe axis direction

[0151] CD: Pipe circumferential direction

[0152] K: Fluid pipe

[0153] K1: Leakage part

[0154] K2: Outer circumferential surface

[0155] RD: Pipe diameter direction

[0156] W: Leakage instruction manual 11 / 11 page 14 CN 121909354 A Figure 1 Instruction manual drawing 1 / 18 page 15 CN 121909354 A Figure 2 Instruction manual drawing 2 / 18 page 16 CN 121909354 A Figure 3 Instruction manual drawing 3 / 18 page 17 CN 121909354 A Figure 4 Instruction manual drawing 4 / 18 page 18 CN 121909354 A Figure 5 Instruction manual drawing 5 / 18 page 19 CN 121909354 A Figure 6 Instruction manual drawing 6 / 18 page 20 CN Figure 7 of the instruction manual (Figure 7 / 18, page 21) CN 121909354 A Figure 8 of the instruction manual (Figure 8 / 18, page 22) CN 121909354 A Figure 9 of the instruction manual (Figure 9 / 18, page 23) CN 121909354 A Figure 10 of the instruction manual (Figure 10 / 18, page 24) CN 121909354 A Figure 11 of the instruction manual (Figure 11 / 18, page 25) CN 121909354 A Figure 12 of the instruction manual (Figure 12 / 18, page 26) CN 121909354 A Figure 13 of the instruction manual (Figure 13 / 18, page 27) CN 121909354 A Figure 14 of the instruction manual (Figure 14 / 18, page 28) CN 121909354 A Figure 15 of the instruction manual (Figure 15 / 18, page 29) CN 121909354 A Figure 16 Instruction manual, Figure 16 / 18, page 30, CN 121909354 A; Figure 17, Figure 17 / 18, page 31, CN 121909354 A; Figure 18, Figure 18 / 18, page 32, CN 121909354 A. Abstract: This water leakage repair fitting includes: a first unit (1) having a plurality of metal bands (3) provided at intervals in a pipe circumferential.direction of a fluid pipe (K), and a fastening mechanism (4) for fastening together pipe-circumferential-direction end parts of the plurality of metal bands (3); a second unit (2) having a plurality of metal bands (3) provided at intervals in the pipe circumferential direction of the fluid pipe (K), and a fastening mechanism (4) for fastening together pipe-circumferential-direction end parts of the plurality of metal bands (3), the second unit being disposed adjacent to the first unit; and a first water stop sheet (6) formed of an elastic body and extending in a pipe axial direction (AD) from a first metal band (3’) included in the first unit to a second metal band (3’’) included in the second unit. The length (L2) in the pipe circumferential direction of the first water stop sheet (6) is smaller than the length in the pipe circumferential direction of the first metal band (3’) and the second metal band (3’’). The first water stop sheet (6) is pressed to the outer peripheral surface ofthe fluid pipe K by the first metal band (3’) and the second metal band (3’’).

Claims

1. A leak repair fitting, installed on the leaking part of a fluid pipeline, wherein, The leak repair accessories have the following features: The first unit has a fastening mechanism and a plurality of metal strips, the plurality of metal strips being arranged at intervals along the circumferential direction of the fluid conduit, and the fastening mechanism fastening the circumferential ends of the plurality of metal strips to each other. The second unit has a fastening mechanism and a plurality of metal strips, the plurality of metal strips being spaced apart along the circumferential direction of the fluid conduit, the fastening mechanism fastening the circumferential ends of the plurality of metal strips to each other, and the second unit being configured adjacent to the first unit. as well as The first water-stopping plate, formed of an elastomer, extends along the tube axis from the first metal strip included in the first unit to the second metal strip included in the second unit. The circumferential length of the first water-stopping piece is less than the circumferential length of the first metal strip and the second metal strip, and the first water-stopping piece is pressed against the outer circumferential surface of the fluid pipe by the first metal strip and the second metal strip.

2. The leak repair fitting according to claim 1, wherein, A second water-stop plate is provided on the inner circumferential surface of each of the plurality of metal strips constituting the first unit and the second unit.

3. The leak repair fitting according to claim 1 or 2, wherein, A metal plate is provided on the outer peripheral surface of the first waterstop.

4. The leak repair fitting according to claim 3, wherein, The inner circumferential surface of the first water-stopping piece has a plurality of first recesses. The outer peripheral surface of the first waterstop is provided with the outer peripheral surface of the metal plate, and has a second recess corresponding to at least a portion of the first recess among a plurality of the first recesses. The second recess is only disposed within the range that overlaps with the first recess when projected parallel to the pipe diameter direction.

5. The leak repair fitting according to claim 1, wherein, The first metal strip and the second metal strip are marked with identifiers that indicate the location where the first waterstop is configured.

6. The leak repair fitting according to claim 2, wherein, The outer peripheral surface of the first water-stopping sheet has a first concave-convex shape. The inner circumferential surface of the second water-stopping piece has a second concave-convex shape. The first concave-convex shape and the second concave-convex shape fit together.

7. The leak repair fitting according to claim 6, wherein, The first concave-convex shape extends from one end of the first waterstop sheet in the circumferential direction to the other end.

8. The leak repair fitting according to claim 6, wherein, A metal plate is provided on a portion of the outer peripheral surface of the first water-stopping sheet. The first concave-convex shape extends from one end to the other in the circumferential direction of the pipe at the portion of the outer peripheral surface of the first waterstop where the metal plate is not provided.

9. The leak repair fitting according to claim 1, wherein, The length of the first waterstop in the axial direction is greater than the width in the axial direction of each of the first metal strip and the second metal strip.

10. A method for repairing leaks in a fluid pipeline, wherein, The leak repair method includes: The step of temporarily fastening the circumferential ends of the plurality of metal strips constituting the first unit to each other using a fastening mechanism is as follows: The step of temporarily fastening the circumferential ends of the plurality of metal strips constituting the second unit to each other using a fastening mechanism is as follows: The step of positioning the first metal strip included in the first unit and the second metal strip included in the second unit adjacent to the first unit to cover the position of the first water-stopping sheet formed of an elastomer and used to cover the leaking part; and The steps for formally tightening the fastening mechanisms of the first unit and the second unit respectively.

11. The leak repair method according to claim 10, wherein, The positioning is performed using clamps that hold the first and second metal strips from both sides in the direction of the tube axis. The formal fastening is performed while maintaining the positioning achieved by the clamp.

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