A type of belt-type pipe plugging and maintenance device

Abstract

This patent belongs to the field of engineering technology and relates to a belt-type pipeline plugging and repair device, including an inner lining kit and a clamp assembly. The inner lining kit includes a patch plate, a leak-sealing agent, and an adhesive. The leak-sealing agent is applied to the leak point; the patch plate is attached to and covers the leak point; adhesive is applied between the patch plate and the pipeline; the clamp assembly includes a tension band, pull rods, and pull rod connectors. The pull rod connectors tighten a pair of pull rods relative to each other, thereby causing the tension band to press the patch plate firmly onto the pipeline. The beneficial effects of this patent are: high pipeline plugging pressure, high plugging reliability, ease of manufacturing, transportation, installation, and adjustment, and suitability for transporting petrochemical media such as crude oil, natural gas, and refined oil.

Description

Technical Field

[0001] This patent belongs to the field of engineering technology and relates to a belt-type pipe sealing and repair device, and more particularly to a belt-type pipe sealing and repair device for leaking pipes that does not require hot work. Background Technology

[0002] Pipeline leakage is a common pipeline defect, referring to leakage through localized thinning, through-holes, or perforations caused by corrosion, erosion, weld defects, etc. Pipeline leakage seriously threatens the safe operation of pipelines. Especially for pipelines transporting petrochemical media such as crude oil, natural gas, and refined oil, pipeline leaks can lead to significant consequences such as environmental pollution, fires and explosions, personal injury, and property damage. Currently, common pipeline leak repair methods include direct pipe replacement, traditional mechanical clamp sealing, and B-type sleeve sealing. However, these methods have limitations: Direct pipe replacement is a challenging, difficult, costly, and time-consuming operation. Especially for subsea pipelines, the difficulty and cost of direct pipe replacement are far greater than for land-based pipelines, so it is generally not used. Furthermore, this method requires stopping the flow of the pipeline medium, which disrupts production schedules and consequently affects production efficiency.

[0003] While traditional mechanical clamp sealing methods overcome some of the limitations of direct pipe replacement, the fact that these clamps generate sealing pressure by clamping the pipe wall necessitates their use. To ensure structural rigidity, these clamps are typically made of steel, resulting in a bulky and heavy design, with their weight increasing exponentially with pipe diameter. This significantly increases the difficulty of transporting, assembling, and adjusting the clamps, and also easily leads to stress concentration in localized contact areas, potentially causing pipe buckling failure. Furthermore, for ease of assembly, mechanical clamps often use separate seals, making it difficult to guarantee sealing performance and sealing reliability, thus posing a risk of secondary leakage. Additionally, because traditional mechanical clamp sealing methods cannot guarantee reliable pipe sealing, and the rigid clamps placed outside the pipe accelerate the electrochemical corrosion process, they are often considered temporary maintenance operations.

[0004] 3. Other methods such as type B sleeves, live pipe tapping and sealing, and welding patching all require hot work and are difficult to apply to situations involving the transportation of petrochemical media such as crude oil, natural gas, and refined oil. Summary of the Invention

[0005] To address the aforementioned limitations of existing technologies, this patent provides a belt-type pipe plugging and maintenance device, characterized in that: Includes lining kits and clamping components; The lining kit includes patch panels, sealant, and adhesive; sealant is applied inside the leak; the patch panel is then applied to cover the leak; adhesive is applied between the patch panel and the pipe; The clamp assembly includes a tension band, pull rods, and pull rod connectors, wherein: pull rods are fixed at both ends of the tension band; the pull rod connectors tighten a pair of pull rods relative to each other, thereby causing the tension band to press the patch plate onto the pipe.

[0006] Preferably, the length of the tension band is less than the perimeter of the pipe cross-section.

[0007] Preferably, the tie rod connector is a threaded fastener.

[0008] Preferably, pull rods are inserted into both ends of the tension band along its width direction.

[0009] More preferably, a pair of tie rods have coaxial through holes at one end on the same side; the tie rod connector passes through the through hole on the same side, thereby pulling the tie rods together.

[0010] Preferably, the tensioning band is one of the following: steel wire braided band, steel band, steel ring chain band, chain band, Kevlar band, or carbon fiber band.

[0011] Preferably, the center area of ​​the patch is close to the leak point.

[0012] Preferably, the width of the patch plate is not less than the width of the tension band.

[0013] Preferably, the tension bands are arranged symmetrically about the middle face of the patch plate.

[0014] Preferably, the lining kit is arranged symmetrically with respect to the middle face of the tensioner.

[0015] Compared with existing technologies, the advantages of this patent are: high pipeline sealing pressure, high sealing reliability, easy manufacturing, transportation, installation and adjustment, and suitable for transporting petrochemical media such as crude oil, natural gas and refined oil. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram (including the pipeline) of a specific embodiment of a belt-type pipeline sealing and repair device of this patent.

[0017] Figure 2 This is a three-dimensional structural diagram (including the pipeline) of a specific embodiment of a belt-type pipeline sealing and repair device of this patent from another viewpoint.

[0018] Figure 3 for Figure 2 A three-dimensional structural diagram (including the pipe) of a tape-type pipe plugging and repair device obtained by cutting it with a middle plane perpendicular to the pipe axis.

[0019] Figure 4 To hide Figure 3A three-dimensional structural diagram (including pipes) of the clamping assembly viewed from another perspective. Figure 5 This is a three-dimensional partial structural diagram (including the pipeline) of a specific embodiment two of the belt-type pipeline sealing and repair device of this patent.

[0020] In the diagram: 1. Lining kit; 11. Leak sealant; 12. Patch panel; 13. Adhesive; 2. Clamp assembly; 21. Tensioner band; 22. Tie rod; 22-1. Nut mounting surface; 23. Tie rod connector. Detailed Implementation

[0021] The technical solutions of this patent embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this patent, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this patent without inventive effort are within the scope of protection of this patent. Specific Implementation Example 1

[0022] Figure 1-4 The attached figure shows a specific embodiment of the belt-type pipe sealing and repair device of this patent. Figure 1-4 As shown in the figure, this patent discloses a belt-type pipe plugging and repair device, characterized in that: Includes lining kit 1 and clamp assembly 2; The lining kit includes a patch plate 12, a sealant 11, and an adhesive 13. The sealant 11 is applied to the leak point. The patch plate 12 is then applied to cover the leak point in the pipe. Adhesive 13 is applied between the patch plate 12 and the pipe, bonding the patch plate 12 to the outer wall of the pipe. In this example, more specifically, the sealant 11 is applied to the leak point in the pipe and then compacted and smoothed. After the sealant 11 cures, it achieves initial sealing of the pipe. Subsequently, adhesive 13 is fully applied to the area on the outer wall of the pipe that contacts the patch plate (the leak patching area) and to the inside of the patch plate 12. The patch plate 12 covers the outer wall of the pipe sealed with the sealant 11.

[0023] To ensure that the patch 12 is reliably fixed to the pipe (relative to the leak), the clamp assembly 2 includes a tension band 21, a pull rod 22, and a pull rod connector 23, wherein: the tension band 21 is wrapped around the outer periphery of the patch 12; pull rods 22 are fixed at both ends of the tension band 21; the pair of pull rods 22 are pulled together by the pull rod connector 23, thereby pressing the patch 12 onto the pipe by the tension band 21.

[0024] Preferably, the length of the tension band 21 is less than the perimeter of the pipe cross-section.

[0025] Preferably, the tie rod connector 23 is a threaded fastener; specifically, a bolt.

[0026] More preferably, pull rods 22 are inserted into both ends of the tension band 21 along its width direction; a pair of pull rods 22 are provided with coaxial through holes on one end on the same side; the bolts are inserted into the through holes on the same side, thereby tightening the pull rods 22 relative to each other; the clamping force of the tension band 21 on the patch plate 12 is adjusted by adjusting the preload of the bolts.

[0027] Preferably, the tensioning band 21 is one of the following: steel wire braided band, steel band, steel ring chain band, chain band (multi-row chain), Kevlar band (woven from Kevlar fiber material), or carbon fiber band. In this example, a lightweight and high-strength Kevlar band is selected; calculations show that the clamp assembly 2 can provide a sealing pressure of not less than 8 MPa.

[0028] Preferably, in order to ensure that the force on the tape-type pipe plugging and repair device of this patent is uniform and thus improve the plugging reliability, the center area of ​​the patch plate is close to the leak point; the width of the patch plate is not less than the width of the tension band 21; the tension band 21 is symmetrically arranged about the middle surface of the patch plate 12; the inner lining kit 1 is symmetrically arranged about the middle surface of the tension band 21. Specific Implementation Example 2

[0029] To improve the connection reliability of the tie rod connector 23, such as Figure 5 As shown, a nut mounting surface 22-1 is provided on the side of the pull rod 22 that contacts the nut to increase the contact area with the nut.

[0030] In order to potentially increase the cross-sectional area of ​​the tie rod 22 and thus improve the bending stiffness of the tie rod connector 23, it is preferable that the cross-section of the tie rod 22 is a geometric shape composed of a rectangle and a semicircle.

[0031] To facilitate a full understanding of this patent, the assembly process is described below: Step 1: Grind and clean the leak point to ensure the cleanliness and roughness of the leak patching area meet the requirements of subsequent patching work; apply the leak sealant 11 and fill it into the leak point. After the leak sealant 11 has cured, apply the adhesive 13 fully to the leak patching area and the inside of the patching plate 12, and then slowly press the patching plate 12 into the patching area. Note that during installation, adjust the position of the patching plate 12 to ensure that the distance between the leak area and the edge of the patching plate is equal.

[0032] Step 2: Place the tension band 21 on the outside of the patch plate 12. During installation, adjust the position of the tension band 21 to ensure that the distance between the patch plate 12 and the edge of the tension band 21 is equal. Then, insert pull rods 22 into both ends of the tension band 21 along the width direction. A pair of pull rods 22 have coaxial through holes on one end on the same side. The pull rod connector 23 is a bolt. The bolt is inserted into the through hole on the same side to tighten the pull rods 22 relative to each other. Adjust the preload of the bolt to adjust the clamping force of the tension band 21 on the patch plate 12 to complete the sealing.

[0033] As can be seen from the above description of specific embodiments of this patent, the advantages of this patent are: 1. Centered on the pipe leak point, an inner lining kit and a clamping assembly are sequentially fixed on the outer wall of the pipe from the inside out, thereby significantly improving the pipe sealing pressure. The reason is that: the leak-sealing agent 11 provides the first sealing barrier; the adhesive 13 and the patch plate 12 provide the second sealing barrier; the inner lining kit can provide a portion of the initial sealing pressure to the pipe through the above two sealing barriers; in addition, it is worth emphasizing that when the tensioning band 21 is made of high-strength materials such as Kevlar tape, the clamping assembly can provide an additional sealing force of not less than 8 MPa.

[0034] 2. Higher sealing reliability is achieved because: the tension band 21, made of high-strength materials such as Kevlar, has a rougher surface, which significantly increases the contact area between the tension band 21 and the pipe wall; in addition, the molecular bonding force of high-molecular materials such as Kevlar is significantly higher than that of steel, thus providing better creep resistance; non-metallic materials such as Kevlar have good electrochemical properties and can resist corrosion for a long time. Based on the above three reasons, the problem of sealing failure due to loosening of the tension band 21 under high pipeline pressure fluctuations, pipeline vibration, external environmental disturbances such as ocean currents, or electrochemical corrosion is eliminated, ensuring that the clamp assembly 2 can maintain a relatively stable sealing force for a long time.

[0035] 3. By using non-metallic materials such as Kevlar straps as the tensioning band 21, the size and weight of the clamp components are significantly reduced, making this patented device more compact and portable compared to traditional mechanical clamps. Furthermore, this patent allows for adjustment of the clamp sealing pressure by adjusting the thread preload, facilitating rapid deployment and assembly for quick on-site sealing of leaking pipes. It is worth emphasizing that this patent is particularly convenient for manufacturing, transportation, installation, and adjustment, especially in the maintenance of large-diameter pipelines.

[0036] 4. Compared with sealing processes such as type B sleeves, the sealing and maintenance work carried out using this patent does not require hot work, so it is suitable for situations involving the transportation of petrochemical media such as crude oil, natural gas, and refined oil.

[0037] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this patent is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this patent. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A belt-type pipe plugging and maintenance device, characterized in that: Includes lining kit (1) and clamping assembly (2); The lining kit includes a patch plate (12), a sealant (11), and an adhesive (13); the sealant (11) is applied inside the leak; the patch plate (12) is attached to and covers the leak; the adhesive (13) is applied between the patch plate (12) and the pipe. The clamp assembly (2) includes a tension band (21), a pull rod (22), and a pull rod connector (23), wherein: the length of the tension band (21) is less than the circumference of the pipe section; pull rods (22) are fixed at both ends of the tension band (21); pull rods (22) are inserted at both ends of the tension band (21) along its width direction; the pull rod connector (23) is a threaded fastener; the pair of pull rods (22) are tightened relative to each other by the pull rod connector (23), so that the tension band (21) presses the patch plate (12) onto the pipe.

2. The belt-type pipeline plugging and maintenance device according to claim 1, characterized in that: A pair of pull rods (22) have coaxial through holes on one end on the same side; the pull rod connector (23) passes through the through hole on the same side, thereby pulling the pull rods (22) together.

3. The belt-type pipeline plugging and maintenance device according to claim 1, characterized in that: The tensioning belt (21) is one of the following: steel wire braided belt, steel belt, steel ring chain belt, chain belt, Kevlar belt, and carbon fiber belt.

4. The belt-type pipeline plugging and maintenance device according to claim 1, characterized in that: The center area of ​​the patch is close to the leak point.

5. The belt-type pipeline plugging and maintenance device according to claim 1, characterized in that: The width of the patch plate is not less than the width of the tensioning band (21).

6. The belt-type pipeline plugging and maintenance device according to claim 1, characterized in that: The tension band (21) is arranged symmetrically about the middle face of the patch plate (12).

7. The belt-type pipeline plugging and maintenance device according to claim 1, characterized in that: The lining kit (1) is arranged symmetrically about the middle face of the tension band (21).

8. The belt-type pipeline plugging and maintenance device according to claim 1, characterized in that: A nut mounting surface (22-1) is provided on the side of the tie rod (22) that contacts the nut.

9. The belt-type pipeline plugging and maintenance device according to claim 8, characterized in that: The cross-section of the tie rod (22) is a geometric shape composed of a rectangle and a semicircle.

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