A split clamp for pipe leaks

Abstract

The application provides a split clamp for pipeline leakage, and belongs to the technical field of pipeline leakage repair. In order to solve the problem that the existing pipeline plugging device is prone to oil leakage, the split clamp for pipeline leakage comprises a driving unit (1) and two half shells (3). The driving unit (1) can drive the lower ends of the two half shells (3) to open or close. The inner circumferential surface (32) of the half shell (3) is provided with an annular sealing ring (4), and the annular sealing ring (4) can surround the leakage part (81) of the pipeline (8) to be sealed. The annular sealing ring is a closed loop structure that can be inflated. The annular sealing ring not only has the ability of unmanned installation and remote self-locking, but also can realize safe, effective and rapid pressure-bearing reliable plugging, and further ensures the safety of the operating personnel.

Description

Technical Field

[0001] This invention relates to the field of pipeline leak repair technology, specifically a split clamp for pipeline leaks. Background Technology

[0002] When large-scale onshore oil pipelines leak and emergency repairs are required, traditional sealing clamps rely entirely on manual installation. However, oil leaks occur in highly hazardous, flammable, and explosive environments, making close-range manual sealing operations extremely risky. Furthermore, the extremely high pressure of the leaking medium within the pipeline makes it difficult for personnel to approach the leak point, significantly increasing the difficulty and potential hazards of the sealing operation.

[0003] To enable remote maintenance or emergency repair of oil pipelines, Chinese patent document CN119572862A, published on March 7, 2025, discloses "An Intelligent Leak-Sealing Device, Leak-Sealing Equipment, and Leak-Sealing Method." This intelligent leak-sealing device can quickly seal leaks in pipelines. However, due to the discontinuous sealing ring, oil leakage still occurs after the intelligent leak-sealing device is installed on the leaking pipeline. Furthermore, to prevent leakage, existing pipeline leak-sealing devices typically require cleaning around the leaking area on the pipeline before use, such as peeling off the anti-corrosion layer, which reduces the efficiency of pipeline leak repair. Summary of the Invention

[0004] To address the problem of oil leakage that is common in existing pipeline sealing devices, this invention provides a split clamp for pipeline leaks. The inner circumferential surface of the split clamp's half-shell is provided with an annular sealing ring, which is a pressurizable closed-loop structure. This not only enables unmanned installation and remote self-locking but also achieves safe, effective, and rapid pressurized reliable sealing, further ensuring the safety of operators.

[0005] The technical solution adopted by the embodiments of the present invention to solve its technical problem is as follows: A split clamp for pipeline leakage includes a drive unit and two half-shells. The two half-shells are connected by a rotating shaft. The drive unit can drive the lower ends of the two half-shells to open or close. The two half-shells can form a pipeline receiving cavity. An annular sealing ring is provided on the inner circumferential surface of the half-shells. The annular sealing ring can surround the leaking part of the pipeline to be sealed.

[0006] The beneficial effects of the embodiments of the present invention are: 1. The inner circumferential surface of the split-type clamp for pipeline leakage is provided with an annular sealing ring, and the annular sealing ring is a pressurizable closed-loop structure. It not only has unmanned installation and remote self-locking capabilities, but also can achieve safe, effective and rapid pressurized reliable sealing, and further ensure the safety of operators.

[0007] 2. This split clamp for pipeline leaks allows for emergency pipeline repair and maintenance without removing the anti-corrosion layer from the pipeline before use, thus improving the efficiency of pipeline sealing. Attached Figure Description

[0008] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0009] Figure 1 This is a front view schematic diagram of the split clamp for pipeline leakage described in this invention in the closed state.

[0010] Figure 2 This is a left-side view of the split clamp for pipeline leakage described in this invention when it is in the closed state.

[0011] Figure 3 It is along Figure 1 Cross-sectional view along the AA direction.

[0012] Figure 4 This is a front view schematic diagram of the split clamp for pipeline leakage described in this invention in the open state.

[0013] Figure 5 This is a three-dimensional schematic diagram of the split clamp for pipeline leakage described in this invention in the open state.

[0014] Figure 6 This is a left-side view of the left half-shell.

[0015] Figure 7 This is a three-dimensional schematic diagram of the annular sealing ring when the split clamp for pipeline leakage described in this invention is in the closed state.

[0016] Figure 8 This is a cross-sectional schematic diagram of the annular sealing ring.

[0017] Figure 9 This is a schematic diagram of the operation of the split clamp for pipeline leakage described in this invention when it is in the open state.

[0018] Figure 10 This is a schematic diagram of the operation of the split clamp for pipeline leakage described in this invention when it is in the closed state.

[0019] Figure 11 This is a partial cross-sectional schematic diagram of the split clamp for pipeline leakage described in this invention in the closed state.

[0020] The annotations in the attached figures are explained as follows: 1. Drive unit; 2. Shaft; 3. Half-shell; 4. Annular seal; 5. Locking mechanism; 6. Lifting flange; 7. Hanger; 8. Pipe to be sealed; 11. Pin; 31. Pipe cavity; 32. Inner circumferential surface; 33. Sealing ring mounting groove; 34. Outer circumferential surface; 35. Outer rib; 36. Drainage port; 37. Sealing area; 38. Valve; 39. Lower protrusion; 41. Front circumferential section; 42. Lower axial section; 43. Rear circumferential section; 44. Upper axial section; 45. Inner pressurization channel; 46. Pressurization connector; 51. Hydraulic cylinder with pin; 52. Pin shaft; 53. Sleeve; 71. Curved edge; 72. Installation notch; 73. Baffle; 81. Leakage location. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] For ease of understanding and description, the following description of the present invention uses absolute positional relationships. Unless otherwise specified, the directional term "above" indicates... Figure 1 The direction above, the directional word "down" indicates Figure 1 The lower side of the middle, the directional word "left" indicates Figure 1 The left side of the direction, the directional word "right" indicates Figure 1 The right-hand direction in the text, the directional word "front" indicates perpendicular to. Figure 1 The direction of the paper and the direction pointing inwards; the directional word "back" indicates perpendicular to. Figure 1 The orientation of the paper is pointed outwards from the viewpoint of the reader or user. This invention is described from the perspective of the reader or user, but the aforementioned directional terms should not be construed as limiting the scope of protection of this invention. Regarding the material, weight, size, angle, and parameters of the components, those skilled in the art can determine or replace them according to actual needs or a limited number of experiments.

[0023] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the split clamp for pipeline leakage includes a drive unit 1 and two half-shells 3. The two half-shells 3 are symmetrically arranged on the left and right sides and connected by a rotating shaft 2. Both half-shells 3 can rotate around the rotating shaft 2. The drive unit 1 can drive the lower ends of the two half-shells 3 to open or close. The two half-shells 3 can form a pipeline receiving cavity 31. The inner circumferential surface 32 of the half-shell 3 is provided with an annular sealing ring 4. One annular sealing ring 4 can surround the leakage part 81 of the pipeline 8 to be sealed.

[0024] An annular sealing ring 4 is provided on the inner circumferential surface 32 of the left half-shell 3, or an annular sealing ring 4 is provided on the inner circumferential surface 32 of the right half-shell 3, or an annular sealing ring 4 is provided on the inner circumferential surface 32 of both the left and right half-shell 3. The annular sealing ring 4 is a closed-loop structure, that is, the annular sealing ring 4 is a continuous and complete annular structure with no breaks in the circumference of the annular sealing ring 4.

[0025] like Figure 5 , Figure 6 As shown, the inner circumferential surface of the semi-shell 3 is also provided with a sealing ring mounting groove 33, and the annular sealing ring 4 is matchedly disposed in the sealing ring mounting groove 33. The projection of the annular sealing ring 4 in the direction perpendicular to the left and right can be circular, rectangular, etc. The area of ​​the inner circumferential surface 32 of the semi-shell 3 surrounded by the annular sealing ring 4 is 50% to 95% of the total area of ​​the inner circumferential surface 32 of the semi-shell 3, preferably 70% to 90%.

[0026] like Figure 6 , Figure 7 As shown, in order to better cope with leakage points 81 of different shapes and sizes, preferably, the projection of the annular sealing ring 4 in the direction perpendicular to the left and right is approximately rectangular. The annular sealing ring 4 contains a front circumferential section 41, a lower axial section 42, a rear circumferential section 43, and an upper axial section 44 connected sequentially in the circumferential direction (the front circumferential section 41 and the upper axial section 44 are connected). The annular sealing ring 4 is a continuous and complete annular structure, which can achieve sealing at the upper and lower joints and in the circumferential direction of the entire sealing cavity, forming a complete sealing area 37.

[0027] Both the front circumferential segment 41 and the rear circumferential segment 43 extend circumferentially along the inner circumferential surface 32, while both the lower axial segment 42 and the upper axial segment 44 extend axially along the inner circumferential surface 32. The front circumferential segment 41 is parallel to the front side of the half-shell 3, the rear circumferential segment 43 is parallel to the rear side of the half-shell 3, the lower axial segment 42 is parallel to the lower side of the half-shell 3, and the upper axial segment 44 is parallel to the upper side of the half-shell 3.

[0028] Annular sealing rings 4 are provided on the inner circumferential surfaces 32 of both left and right half-shells 3. The two annular sealing rings 4 are symmetrical and mirror images of each other. The upper axial section 44 of the left annular sealing ring 4 and the upper axial section 44 of the right annular sealing ring 4 are matched and fitted together. The lower axial section 42 of the left annular sealing ring 4 and the lower axial section 42 of the right annular sealing ring 4 are matched and fitted together.

[0029] like Figure 7 , Figure 8 As shown, the annular sealing ring 4 contains a pressurized inner channel 45, and is connected to a pressurized nozzle 46. High-pressure fluid (such as gas or liquid) can be injected into the pressurized inner channel 45 through the nozzle 46. This high-pressure fluid causes the annular sealing ring 4 to expand radially, similar to how a bicycle inner tube expands radially after inflation. This results in a better sealing effect. Therefore, the split clamp for pipeline leaks can be used for emergency pipeline repair and maintenance without removing the anti-corrosion layer from the pipeline before use, improving the efficiency of pipeline sealing.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the two semi-shells 3 have basically the same structure and dimensions. Both semi-shells 3 are semi-cylindrical structures. When the lower ends of the two semi-shells 3 are closed, they can form a complete cylindrical structure. Two protruding ribs 35 are provided on the outer peripheral surface 34 of the semi-shells 3. The two protruding ribs 35 are spaced apart and extend in the vertical direction. The two pressurizing nozzles 46 are correspondingly located inside the two protruding ribs 35, which protects the pressurizing nozzles 46.

[0031] like Figure 5 , Figure 6 , Figure 7 As shown, the pressurizing nozzle 46 is a tubular structure. The two pressurizing nozzles 46 are connected one-to-one with the front circumferential section 41 and the rear circumferential section 43. The pressurizing nozzles 46 extend along the diameter direction of the pipe cavity 31.

[0032] A drain port 36 is also provided on the outer peripheral surface 34 of the semi-shell 3. The drain port 36 is located within the sealing area 37 enclosed by the annular sealing ring 4. The drain port 36 connects the outside of the outer peripheral surface 34 and the sealing area 37 (between the semi-shell 3 and the pipe to be sealed 8). The drain port 36 is also located between two protruding ribs 35 in the front-back direction. A valve 38 is connected to the outside of the drain port 36.

[0033] A locking mechanism 5 is provided at the lower end of the protruding rib 35, meaning that a locking mechanism 5 is provided at the lower end of each of the left and right half-shells 3. The two locking mechanisms 5 are symmetrically arranged front and back and are mirror images of each other. The locking mechanism 5 includes a pin hydraulic cylinder 51 and a pin shaft 52. Alternatively, a locking mechanism 5 can be provided on both the front and back sides of the lower end of the left half-shell 3, or on both the front and back sides of the lower end of the right half-shell 3. The locking of the split clamp for pipeline leakage does not require screwing or using a hydraulic puller; using a pin hydraulic cylinder 51 and a pin shaft 52 as the locking mechanism 5 is more convenient and efficient.

[0034] like Figure 1 , Figure 2 , Figure 3 As shown, when the lower ends of the two half-shells 3 are closed, the pin hydraulic cylinder 51 can drive the pin shaft 52 to insert into the outer protruding ribs 35 of the two half-shells 3. The pin shaft 52 can lock the lower ends of the half-shells 3. At this time, the lower ends of the two half-shells 3 are connected and fixed as one, the locking mechanism 5 is in the locked state, and the piston rod of the pin hydraulic cylinder 51 is in the extended state.

[0035] When the hydraulic cylinder 51 connected to one half-shell 3 drives the pin shaft 52 to disengage from the outer protruding rib 35 of the other half-shell 3, the lower ends of the two half-shells 3 can open or close. At this time, there is no rigid connection between the lower ends of the two half-shells 3, the locking mechanism 5 is in the unlocked state, and the piston rod of the hydraulic cylinder 51 is in the retracted state.

[0036] The cylinder of the pin hydraulic cylinder 51 is connected and fixed to the outer protruding rib 35 through the sleeve 53. The pin hydraulic cylinder 51 is located in front of or behind the outer protruding rib 35. The piston rod of the pin hydraulic cylinder 51 is coaxially connected and fixed to the pin shaft 52. The pin shaft 52 passes through the outer protruding rib 35. The pin shaft 52 is parallel to the axis of the pipe receiving cavity 31. The pin shaft 52 extends in the front-back direction. The pin hydraulic cylinder 51 can drive the pin shaft 52 to move back and forth.

[0037] To achieve a more secure locking, two lower protrusions 39 are provided at the lower end of the outer peripheral surface 34 of the half-shell 3. The two lower protrusions 39 are spaced apart and located between the two outer protruding ribs 35 in the front-back direction. When the lower ends of the two half-shells 3 are closed, the pin hydraulic cylinder 51 can also drive the pin shaft 52 to insert into the lower protrusions 39 of the two half-shells 3.

[0038] For example, such as Figure 1 , Figure 3As shown, when the lower ends of the two half-shells 3 are closed, the left-side pin hydraulic cylinder 51 can drive the pin shaft 52 to sequentially insert the outer protrusion 35 at the rear end of the left half-shell 3, the outer protrusion 35 at the rear end of the right half-shell 3, the lower protrusion 39 at the rear end of the left half-shell 3, and the lower protrusion 39 at the rear end of the right half-shell 3; the right-side pin hydraulic cylinder 51 can drive the pin shaft 52 to sequentially insert the outer protrusion 35 at the front end of the right half-shell 3, the outer protrusion 35 at the front end of the left half-shell 3, the lower protrusion 39 at the front end of the right half-shell 3, and the lower protrusion 39 at the front end of the left half-shell 3.

[0039] The split clamp for pipeline leakage also includes a lifting flange 6 and a hanger 7 connected vertically. The lifting flange 6 has a horizontal disc-shaped structure. The drive unit 1 and the rotating shaft 2 are arranged vertically at intervals. The drive unit 1 can drive the upper ends of the two half-shells 3 to move closer or further apart. The rotating shaft 2 is in the front-back direction and passes through the hanger 7. To improve adaptability, the half-shells 3 can swing left and right relative to the hanger 7 around the rotating shaft 2.

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the drive unit 1 is located at the upper end of the half-shell 3, and the rotating shaft 2 is located at the upper or middle part of the half-shell 3. The two drive units 1 are arranged at intervals. The drive unit 1 can be a hydraulic cylinder. The drive unit 1 extends in the left and right direction. The two ends of the drive unit 1 are respectively connected to the upper ends of the outer protruding ribs 35 of the two half-shell 3 through the pin shaft 11.

[0041] When the piston rod of the drive unit 1 is extended, the lower ends of the two half-shells 3 are closed and connected to each other, and the split clamp for pipeline leakage is also closed. When the piston rod of the drive unit 1 is retracted, the lower ends of the two half-shells 3 are open and separated from each other, and the split clamp for pipeline leakage is also open.

[0042] The hanger 7 is an upright, elongated, plate-like structure. Two hangers 7 are spaced apart front to back. Two semi-shells 3 are located between the two hangers 7 along the front-back direction. The lower end of the hanger 7 is an arc-shaped edge 71. The pipe receiving cavity 31 is cylindrical. The circle containing the arc-shaped edge 71 is perpendicular to the axis of the pipe receiving cavity 31. The center of the circle containing the arc-shaped edge 71 is located on the axis of the pipe receiving cavity 31. The radius of the circle containing the arc-shaped edge 71 is 0mm to 10mm smaller than the radius of the pipe receiving cavity 31.

[0043] like Figure 9 , Figure 10As shown, when the split clamp for pipeline leakage is also in the closed state, the inner diameter of the pipeline receiving cavity 31 formed by the two half-shells 3 should match the outer diameter of the pipeline 8 to be sealed, that is, the inner diameter of the pipeline receiving cavity 31 formed by the two half-shells 3 is equal to or slightly larger than the outer diameter of the pipeline 8 to be sealed. Usually, the inner diameter of the pipeline receiving cavity 31 formed by the two half-shells 3 will be slightly larger than the outer diameter of the pipeline 8 to be sealed.

[0044] When the inner diameter of the pipe receiving cavity 31 is slightly larger than the outer diameter of the pipe to be sealed 8, after the split clamp for pipe leakage is fitted onto the pipe to be sealed 8, the axis of the pipe receiving cavity 31 is lower than the axis of the pipe to be sealed 8. An annular gap will be formed between the split clamp for pipe leakage and the pipe to be sealed 8, and the distance at the upper end of the annular gap is less than the distance at the lower end. The width of the annular gap gradually increases along the direction from top to bottom. After the annular sealing ring 4 is pressurized, there may be a problem of easy leakage at the lower part.

[0045] To solve this problem, the radius of the circle containing the arc edge 71 can be 2mm to 10mm smaller than the radius of the pipe cavity 31, so that the axis of the pipe cavity 31 coincides with the axis of the pipe to be sealed 8, and a more uniform annular gap will be formed between the split clamp for pipe leakage and the pipe to be sealed 8.

[0046] In addition, such as Figure 11 As shown, the hanger 7 and the rotating shaft 2 are detachably connected. After the split clamp for pipeline leakage is installed, the hanger 7 and the rotating shaft 2 are separated. This also makes the width of the annular gap more uniform after the annular sealing ring 4 is pressurized, thereby improving the sealing effect of the annular sealing ring 4. For example, the hanger 7 is provided with an installation notch 72, which faces left or right. The installation notch 72 is detachably connected (e.g., bolted) to a baffle 73. The rotating shaft 2 passes through the installation notch 72. When the baffle 73 is connected to the hanger 7, the rotating shaft 2 cannot detach from the hanger 7. When the baffle 73 is separated from the hanger 7, the rotating shaft 2 can detach from the hanger 7.

[0047] The working process of the split clamp used for pipeline leaks is described below.

[0048] Step 1, before installation, such as Figure 9 As shown, the split clamp for pipeline leakage is in the open state, and then connected to the crane via the lifting flange 6, suspended directly above the leakage point 81 of the pipeline 8 to be sealed. Figure 2 As shown, when the split clamp for pipeline leakage is placed on the pipeline 8 to be sealed, the piston rod of the remote control hydraulic system controls the drive unit 1 to extend, and the drive unit 1 drives the lower ends of the two half-shells 3 to close, so that the split clamp for pipeline leakage is in a closed state.

[0049] Step 2, as follows Figure 3 , Figure 10 As shown, the remote-controlled hydraulic system controls the piston rod of the hydraulic cylinder 51 to extend, causing the pin shaft 52 to sequentially insert into the outer protrusions 35 and lower protrusions 39 of the two half-shells 3, thereby locking (or tightening) the split clamp for pipeline leakage to the pipeline 8 to be sealed. At this time, the lifting flange 6 and the hanger 7 can be removed as needed.

[0050] Step 3, as follows Figure 10 , Figure 11 As shown, the remote-controlled hydraulic system pressurizes the annular sealing ring 4 through the pressurizing port 46, causing the annular sealing ring 4 to expand under pressure. The annular sealing ring 4 fills the split clamp and the pipe to be sealed 8, and surrounds the leaking part 81. After the pressurization pipe pressure reaches a certain value, the gap between the damaged pipe and the clamp body and the gap between the two metal shells will be filled by the expanded annular sealing ring 4, so that a sealing area 37 is formed between the damaged pipe and the half shell 3. This sealing area 37 can control the leaking oil at the leak point and form a completely reliable seal on the leaking part 81.

[0051] Step 4: After the initial sealing is completed, the leakage of the medium inside the pipeline has been controlled. A valve 38 (such as a ball valve) is connected to the drain port 36. After the valve 38 is opened, the leaked oil can be guided to the leaked oil collection point through the drain port 36 and the valve 38 in sequence, so as to guide and control the leaked oil.

[0052] The described split-type clamp for pipeline leaks utilizes hydraulically assisted clamping installation, combined with circumferential and active sealing technologies. This enables unmanned installation and remote self-locking, providing remote-controlled pressurized sealing of oil pipeline leaks. The split-type clamp not only achieves rapid and reliable sealing of oil pipeline leaks but also ensures the safety of operators. Furthermore, this split-type clamp allows for emergency pipeline repairs and maintenance without removing the pipeline's anti-corrosion layer before use, thus improving the efficiency of pipeline sealing.

[0053] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, substitutions of equivalent components, or equivalent changes and modifications made within the scope of protection of the present invention, should still fall within the scope of the present invention. Furthermore, the technical features, technical solutions, and embodiments of the present invention can be freely combined and used.

Claims

1. A split clamp for pipe leakage, characterized in that, The split clamp for pipeline leakage includes a drive unit (1) and two half-shells (3). The two half-shells (3) are connected by a rotating shaft (2). The drive unit (1) can drive the lower ends of the two half-shells (3) to open or close. The two half-shells (3) can form a pipeline receiving cavity (31). The inner circumferential surface (32) of the half-shell (3) is provided with an annular sealing ring (4). The annular sealing ring (4) can surround the leakage part (81) of the pipeline (8) to be sealed.

2. The split clamp for pipeline leakage according to claim 1, characterized in that, The inner circumferential surface of the semi-shell (3) is also provided with a sealing ring mounting groove (33), and the annular sealing ring (4) is matchedly disposed in the sealing ring mounting groove (33). The annular sealing ring (4) is a closed-loop structure, and the annular sealing ring (4) contains a front circumferential section (41), a lower axial section (42), a rear circumferential section (43), and an upper axial section (44) connected in sequence.

3. The split clamp for pipeline leakage according to claim 1, characterized in that, The annular sealing ring (4) contains a pressurized inner channel (45), and the annular sealing ring (4) is connected to a pressurized nozzle (46). High-pressure fluid can be injected into the pressurized inner channel (45) through the pressurized nozzle (46), and the high-pressure fluid can cause the annular sealing ring (4) to expand radially.

4. The split clamp for pipeline leakage according to claim 3, characterized in that, Two protruding ribs (35) are provided on the outer peripheral surface (34) of the semi-shell (3). The two protruding ribs (35) are spaced apart from each other and extend in the vertical direction. The pressurizing nozzle (46) is located inside the protruding ribs (35).

5. The split clamp for pipeline leakage according to claim 4, characterized in that, A drain port (36) is also provided on the outer peripheral surface (34) of the half shell (3). The drain port (36) is located in the sealing area (37) enclosed by the annular sealing ring (4). The drain port (36) is also located between two external convex ribs (35). A valve (38) is connected to the outside of the drain port (36).

6. The split clamp for pipeline leakage according to claim 4, characterized in that, A locking mechanism (5) is provided at the lower end of the protruding rib (35). The locking mechanism (5) includes a pin hydraulic cylinder (51) and a pin shaft (52). When the lower ends of the two half-shells (3) are closed, the pin hydraulic cylinder (51) can drive the pin shaft (52) to insert into the protruding rib (35) of the two half-shells (3). The pin shaft (52) can lock the lower end of the half-shells (3).

7. The split clamp for pipeline leakage according to claim 6, characterized in that, The cylinder of the pin hydraulic cylinder (51) is connected and fixed to the outer protruding rib (35), and the piston rod of the pin hydraulic cylinder (51) is connected and fixed to the pin shaft (52). The pin shaft (52) extends in the front-back direction, and the pin hydraulic cylinder (51) can drive the pin shaft (52) to move back and forth.

8. The split clamp for pipeline leakage according to claim 6, characterized in that, Two lower protrusions (39) are provided at the lower end of the outer peripheral surface (34) of the half-shell (3). The two lower protrusions (39) are spaced apart in front and behind. The two lower protrusions (39) are located between two outer protruding ribs (35) in the front and back direction. When the lower ends of the two half-shells (3) are closed, the pin hydraulic cylinder (51) can also drive the pin shaft (52) to insert into the lower protrusions (39) of the two half-shells (3).

9. The split clamp for pipeline leakage according to claim 1, characterized in that, The split clamp for pipeline leakage also includes a lifting flange (6) and a hanger (7) connected vertically. The drive unit (1) and the rotating shaft (2) are arranged vertically and vertically. The drive unit (1) can drive the upper ends of the two half-shells (3) to move closer or further away from each other. The rotating shaft (2) is in the front-back direction and passes through the hanger (7).

10. The split clamp for pipeline leakage according to claim 9, characterized in that, The hanger (7) is an upright plate structure. Two hangers (7) are set at intervals. Two half shells (3) are located between the two hangers (7) along the front-back direction. The lower end of the hanger (7) is an arc-shaped edge (71). The pipe receiving cavity (31) is cylindrical. The circle where the arc-shaped edge (71) is located is perpendicular to the axis of the pipe receiving cavity (31). The center of the circle where the arc-shaped edge (71) is located is on the axis of the pipe receiving cavity (31). The radius of the circle where the arc-shaped edge (71) is located is 0mm to 10mm smaller than the radius of the pipe receiving cavity (31).

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