A pipe live leak sealing device

Abstract

This utility model discloses a pipeline pressurized leak sealing device, including an annular clamp sleeved on the outside of the leaking pipeline. The annular clamp is composed of an upper clamp and a lower clamp, which are symmetrically installed above and below the horizontal leaking pipeline and have the same structure. Each clamp includes a semi-circular pipe and two semi-circular annular end plates, which are respectively sealed at both ends of the semi-circular pipe. The semi-circular pipes of the upper and lower clamps are spliced ​​to form a circular pipe, and the two semi-circular annular end plates at each end of the circular pipe are spliced ​​to form an annular plate. The inner side of the annular plate is welded to the leaking pipeline. The semi-circular pipe of the lower clamp has a water collection cavity corresponding to the leak point of the leaking pipeline, and a drain valve is installed at the bottom of the water collection cavity. This utility model uses the water collection cavity and drain valve to collect and discharge the leaked medium, and then welds the annular clamp to the pipeline, realizing online encapsulation welding and leak sealing of the pressurized pipeline, thereby eliminating the risk of leakage and reducing the maintenance cost of the pipeline.

Description

Technical Field

[0001] This utility model relates to a pressurized leak sealing device for fluid medium pipelines, which can seal leaks in pipelines without affecting the normal transport of the medium, and belongs to the field of pipeline leak sealing technology. Background Technology

[0002] During long-term operation of pressurized pipelines, leaks often occur at pipeline welds (straight welds, circumferential welds) or other severely corroded areas due to factors such as medium corrosion, pipeline support settlement, stress release at pipeline weld joints, and temperature and pressure fluctuations. Traditional methods for handling leaks typically fall into two categories: one is to repair or cover the leak with welding while production is temporarily suspended, which disrupts normal media transport; the other is to use live sealing (also known as live plugging) to plug leaks online without stopping production (while media transport continues normally). From a production perspective, live sealing is more suitable for the company's needs.

[0003] Existing pressurized sealing methods often use tubular flange clamps lined with plastic to plug leaks in pipelines, but this method has several problems: First, the clamp body and lugs are mostly made using welding or casting processes, and the quality of the welds and casting defects can cause potential leakage hazards; Second, the concentricity and parallelism requirements for the installation of tubular flanges are stringent, and processing and measurement errors can lead to incomplete sealing and potential leakage hazards; Third, the sealing material and fastening bolts are subject to creep due to temperature changes, requiring long-term monitoring and timely tightening of the bolts to maintain the seal, which increases maintenance costs for buried media pipelines.

[0004] In summary, existing pressurized sealing methods have many defects and shortcomings, and need further improvement. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a pipeline pressurized leak sealing device to achieve online leak sealing of pressurized pipelines, eliminate potential leakage hazards, and reduce pipeline maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A pressurized leak sealing device for pipelines includes an annular clamp coaxially sleeved on the outside of the leaking pipeline. The annular clamp is composed of an upper clamp and a lower clamp, which are symmetrically installed above and below the horizontal leaking pipeline and have the same structure. Both clamps include a semi-circular pipe and two semi-circular annular end plates. The two semi-circular annular end plates are respectively sealed at both ends of the semi-circular pipe. The semi-circular pipes of the upper and lower clamps are welded together to form a circular pipe coaxial with the leaking pipeline. The two semi-circular annular end plates at each end of the circular pipe are welded together to form an annular plate. The inner side of the annular plate is welded to the leaking pipeline. The semi-circular pipe of the lower clamp has a water collection cavity corresponding to the leak point of the leaking pipeline, and a drain valve is installed at the bottom of the water collection cavity.

[0007] The aforementioned pipeline pressurized leak sealing device has two semi-circular inner plates coaxial with the leaking pipeline inside the semi-circular tube of the lower clamp. The two semi-circular inner plates are located on both sides below the leak point of the leaking pipeline. Each semi-circular inner plate is welded to the inner wall of the semi-circular tube of the lower clamp. The two semi-circular inner plates and the semi-circular tube form a water collection cavity. The drain valve is installed on the drain hole at the bottom of the semi-circular tube of the lower clamp.

[0008] The aforementioned pipeline pressurized leak sealing device also includes a drainage belt, which is wrapped around the leaking part of the leaking pipeline, with the lowest point of the drainage belt located directly above the water collection chamber.

[0009] The aforementioned pipeline pressurized leak sealing device has a drainage band made of flexible absorbent material.

[0010] This invention first uses a water collection chamber and a drain valve to collect and discharge the leaked medium, and then welds a ring clamp onto the pipeline to achieve online encapsulation and welding to seal the leak in the pressurized pipeline. This device does not require additional sealing materials or fastening bolts, thereby eliminating the risk of leakage and reducing the maintenance cost of the pipeline. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is an installation diagram of the present invention, wherein... Figure 1 (a) is the front view. Figure 1 (b) is the left view; Figure 2 This is a structural diagram of the lower clamp, in which... Figure 2 (a) is the front view. Figure 2 (b) is a sectional view of AA. Figure 2 (c) is a top view; Figure 3 This is a structural diagram of the upper clamp, in which... Figure 3 (a) is the front view. Figure 3(b) is a sectional view of BB. Figure 3 (c) is a bottom view; Figure 4 This is a schematic diagram of the installation of the drainage band and the lower clamp.

[0013] The labels in the diagram are as follows: 1. Upper clamp, 2. Lower clamp, 3. Drain valve, 4. Leakage pipe, 5. Semi-circular end plate, 6. Semi-circular inner plate, 7. Semi-circular pipe, 8. Water collection cavity, 9. Drainage band. Detailed Implementation

[0014] This utility model provides a pipeline live leak sealing device to address the shortcomings of existing technologies. The device first depressurizes, diverts, and discharges the medium at the leak point, then welds the device to the pipeline (at least two full welds), and finally seals the drainage channel, effectively solving the problem of easy leakage of existing pressurized pipeline live sealing clamps.

[0015] See Figures 1-4 The present invention includes a drainage belt 9 and an annular clamp coaxially sleeved outside the leakage point of the leakage pipe 4.

[0016] The drainage band 9 is made of flexible absorbent materials such as superabsorbent fiber (SAF) or spunlace nonwoven fabric. It is wrapped around the leaking part of the leaking pipe 4 to prevent the leaking medium from splashing everywhere and affecting the welding of the annular clamp. Since the lowest point of the drainage band 9 is lower than the bottom of the horizontal leaking pipe 4 (see...), Figure 4 The drainage band 9 can also divert the leaked medium directly downwards, making it easier for the ring clamp to collect it.

[0017] The ring clamp is composed of two identical semi-ring clamps spliced ​​together. The two semi-ring clamps are the upper clamp 1 and the lower clamp 2, which are symmetrically installed above and below the horizontal leakage pipe 4.

[0018] Each semi-circular clamp includes a semi-circular pipe 7 coaxial with the leaking pipe 4 and two semi-circular annular end plates 5. The two semi-circular annular end plates 5 are respectively sealed at both ends of the semi-circular pipe 7 by welding. The semi-circular pipes 7 of the two semi-circular clamps are spliced ​​together by welding to form a circular pipe coaxial with the leaking pipe 4. The two semi-circular annular end plates 5 at each end of the circular pipe are spliced ​​together by welding to form an annular plate. The inner side of the annular plate is welded to the leaking pipe 4.

[0019] The lower clamp 2 has two semi-circular inner plates 6 coaxial with the leakage pipe 4. The two semi-circular inner plates 6 are located on both sides of the drainage band 9 wrapped around the leakage part of the leakage pipe 4. Each semi-circular inner plate 6 is welded to the inner wall of the semi-circular pipe 7 of the lower clamp 2. A water collection cavity 8 is formed between the two semi-circular inner plates 6. A drain valve 3 is installed on the drain hole at the bottom of the semi-circular pipe 7 of the lower clamp 2. The drain valve 3 is located at the bottom of the water collection cavity 8.

[0020] The leaking medium from the leaking pipe 4 is guided by the drainage belt 9 to the water collection chamber 8, and then discharged by the drain valve 3, to avoid the medium splashing everywhere or accumulating in the ring clamp and affecting the welding and installation of the ring clamp.

[0021] The preparation process of this utility model is as follows: 1. Based on the type of medium, design temperature, and design pressure in the leaking pipeline 4 to be repaired, determine the material for the ring clamp to ensure that the ring clamp will not react with the medium in the leaking pipeline 4 and will not contaminate the medium in the leaking pipeline 4. 2. The shape and size of the leaking pipe 4 to be repaired and the shape and size of the leak point are obtained by measurement, and the specific size and shape of the upper clamp 1 and the lower clamp 2 are determined accordingly; 3. Cut out two semi-circular tubes 7, four semi-circular annular end plates 5, and two semi-circular annular inner plates 6 from the prepared material to meet the requirements; 4. Weld the two semi-circular end plates 5 to both ends of a semi-circular tube 7 to make an upper clamp 1; The lower clamp 2 is made using the same method. Then, two semi-circular inner plates 6 are welded to the inside of the semi-circular tube 7 of the lower clamp 2 to create a water collection cavity 8 (formed by the semi-circular tube 7 and the two semi-circular inner plates 6). A drain hole is machined at the bottom of the water collection cavity 8 and a drain valve 3 is installed. The inner diameter of the semi-circular end plate 5 is equal to the outer diameter of the leakage pipe 4, and the inner diameter of the two semi-circular inner plates 6 is slightly larger than the outer diameter of the leakage pipe 4. The size of the water collection cavity 8 and the specifications of the drain valve 3 are determined according to the leakage amount of the leakage pipe 4.

[0022] The installation process of this utility model is as follows: 1. Fix the lower clamp 2 onto the leaking pipe 4, and position the water collection chamber 8 directly below the leak point of the leaking pipe 4; 2. Wrap the drainage tape 9 around the leaking part of the leaking pipe 4, use the drainage tape 9 to guide the leaking medium into the water collection chamber 8 and discharge it through the drain valve 3, wipe the medium on the two semi-circular end plates 5 of the lower clamp 2 dry, and weld the two semi-circular end plates 5 to the leaking pipe 4 in full without affecting the welding of the lower clamp.

[0023] 3. After the lower clamp 2 is welded, weld the semi-circular end plates 5 on both sides of the upper clamp 1. Finally, weld the joint between the upper clamp 1 and the lower clamp 2. After all welding is completed, close the drain valve 3 to test for leaks. If there are no leaks in the weld, the online pressurized leak sealing is complete.

[0024] The beneficial effects of this invention are as follows: This invention seals leaks through a cladding welding method without affecting the normal transport of the medium. Simultaneously, a water collection chamber with a drain valve collects and discharges the leaked medium, preventing splashing or excessive accumulation that could affect the welding of the ring clamp. Compared to traditional pressurized sealing devices, this invention eliminates the need for additional sealing materials and fastening bolts, and avoids the need for long-term monitoring and timely bolt tightening to maintain a seal, thus eliminating potential leakage risks and reducing the maintenance costs of the medium pipeline.

Claims

1. A pipe live leak sealing device, characterized in that, The device includes an annular clamp coaxially fitted outside the leaking pipe (4). The annular clamp is composed of an upper clamp (1) and a lower clamp (2). The upper clamp (1) and the lower clamp (2) are symmetrically installed above and below the horizontal leaking pipe (4) and have the same structure. Both include a semi-circular pipe (7) and two semi-circular annular end plates (5). The two semi-circular annular end plates (5) are respectively sealed at both ends of the semi-circular pipe (7). The semi-circular pipes (7) of the upper clamp (1) and the lower clamp (2) are spliced ​​together by welding to form a circular pipe coaxial with the leaking pipe (4). The two semi-circular annular end plates (5) at each end of the circular pipe are spliced ​​together by welding to form an annular plate. The inner side of the annular plate is welded to the leaking pipe (4). The semi-circular pipe (7) of the lower clamp (2) is provided with a water collection cavity (8) corresponding to the leakage point of the leaking pipe (4). A drain valve (3) is installed at the bottom of the water collection cavity (8).

2. The pipeline pressurized leak sealing device according to claim 1, characterized in that, The lower clamp (2) has two semi-circular inner plates (6) inside the semi-circular tube (7) that are coaxial with the leakage pipe (4). The two semi-circular inner plates (6) are located on both sides below the leakage point of the leakage pipe (4). Each semi-circular inner plate (6) is welded to the inner wall of the semi-circular tube (7) of the lower clamp (2). The two semi-circular inner plates (6) and the semi-circular tube (7) form a water collection cavity (8). The drain valve (3) is installed on the drain hole at the bottom of the semi-circular tube (7) of the lower clamp (2).

3. A pipeline pressurized leak sealing device according to claim 2, characterized in that, It also includes a drainage band (9), which is wrapped around the leaking part of the leaking pipe (4), with the lowest point of the drainage band (9) located directly above the water collection chamber (8).

4. A pipeline pressurized leak sealing device according to claim 3, characterized in that, The drainage band (9) is made of flexible absorbent material.

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