Bending arresting device of submarine pipeline

Abstract

The invention provides a buckle arrestor for a submarine pipeline. The buckle arrestor comprises a wrapping part and a cleaning part. A wrapping cavity used for wrapping the submarine pipeline is formed in the wrapping part, and the two sides of the wrapping part can be positioned on the seabed. A coating is arranged on the lower portion of the wrapping part and used for preventing marine organisms from being attached. The cleaning part is arranged on the upper portion of the wrapping part. The cleaning part is provided with at least one scraper, and one side of the scraper can abut against the outer surface of the wrapping part. The cleaning part can drive the scraper to move along a preset path under the disturbance of ocean current, and the outer surface of the wrapping part can be scraped and swept through the scraper so as to remove marine organisms attached to the wrapping part. The corrosion speed of the wrapping part is reduced, the service life of the wrapping part is prolonged, frequent manual maintenance is not needed any more, and the later maintenance cost of the wrapping part is reduced. Meanwhile, the buckle arresting device of the submarine pipeline is relatively simple in structure, production investment is reduced, and use is convenient.

Description

Technical Field

[0001] This invention belongs to the field of submarine pipeline technology, and specifically relates to an anti-bending device for submarine pipelines. Background Technology

[0002] Submarine pipelines are generally laid exposed on the seabed or at shallow depths, subjecting them to environmental loads such as wind, waves, and currents, as well as seabed erosion, over extended periods. This results in significant differences in stress levels between submarine and land-based pipelines. In particular, the strain and stress of submarine pipelines are highly susceptible to variations in laying depth, pipe diameter, and wall thickness. Therefore, submarine pipelines are typically designed to withstand buckling, using buckling arrestors to prevent buckling propagation.

[0003] Existing anti-bending devices generally have a circular ring structure, and depending on the installation method, they can be divided into integral, snap-fit, spiral, and welded types. However, regardless of the type, due to the special environment of subsea pipelines, after a period of operation, a large amount of marine organisms will adhere to the surface of the anti-bending device, which increases the rate of corrosion and greatly reduces its service life, rendering it unable to effectively prevent the subsea pipeline from buckling. Furthermore, to prevent subsea pipeline buckling, the anti-bending device must be replaced frequently, resulting in high maintenance costs.

[0004] Therefore, the existing anti-bending devices have poor corrosion resistance. Summary of the Invention

[0005] To address the above problems, this invention proposes an anti-bending device for subsea pipelines, comprising:

[0006] The wrapping part has a wrapping cavity inside for wrapping the submarine pipeline, and the two sides of the wrapping part can be positioned on the seabed.

[0007] The lower part of the package is provided with a coating to prevent marine organisms from attaching.

[0008] A cleaning section is disposed on the upper part of the packaging section;

[0009] The cleaning part is provided with at least one scraper, one side of which can abut against the outer surface of the wrapping part;

[0010] The cleaning unit can drive the scraper to move along a preset path under the disturbance of ocean currents. The scraper can scrape the outer surface of the package to remove marine organisms attached to the package.

[0011] In some specific embodiments, the cleaning unit is capable of driving the scraper to move axially about the wrapping unit under the influence of ocean current disturbances;

[0012] Alternatively, the cleaning unit can drive the scraper to move axially along the wrapping unit.

[0013] In some specific embodiments, the cleaning unit includes:

[0014] A limiting component is disposed on the outer surface of the upper part of the wrapping part to limit the moving direction and moving range of the scraper;

[0015] A scraping assembly, wherein the scraping assembly is movably disposed on the limiting assembly, and the scraping assembly is movable along the axial direction of the limiting assembly;

[0016] The scraper is positioned on the side of the scraping assembly near the wrapping portion.

[0017] In some specific embodiments, the two ends of the limiting component extend axially along the wrapping portion to enable the scraping component to move axially along the wrapping portion.

[0018] In some specific embodiments, the two ends of the limiting component extend axially around the wrapping portion to enable the scraping component to move axially around the wrapping portion.

[0019] In some specific embodiments, the limiting component includes:

[0020] There are at least two limiting blocks, and the two limiting blocks are symmetrically arranged on the outer surface of the upper part of the wrapping part.

[0021] At least one guide rod is provided, which is disposed between the two limiting blocks and is used to movably connect the scraping assembly.

[0022] In some specific embodiments, the scraping assembly includes:

[0023] There is at least one connecting plate, which is slidably disposed on the guide rod;

[0024] The scraper is located on the side of the connecting plate near the wrapping part.

[0025] In some specific embodiments, there are multiple connecting plates, which are evenly arranged among each other, and a connecting rod is provided between each pair of adjacent connecting plates to fix the relative positions of the multiple connecting plates.

[0026] There are multiple scrapers, and each of the multiple scrapers is set in a one-to-one correspondence with a multiple connecting plate.

[0027] In some specific embodiments, the wrapping part includes:

[0028] Upper casing;

[0029] The lower housing is detachably connected to the upper housing, and the upper housing and the lower housing can be closed to form the enclosing cavity;

[0030] A fixing component is disposed on both sides of the lower shell or the upper shell for fixing to the seabed.

[0031] In some specific embodiments, both the upper housing and the lower housing are made of sacrificial anode material.

[0032] The anti-bending device for subsea pipelines of the present invention can wrap around a designated location of the subsea pipeline via a wrapping part. Furthermore, a coating located at the lower part of the wrapping part prevents marine organisms from adhering to the lower part of the wrapping part. A cleaning part located at the upper part of the wrapping part drives a scraper that abuts against the outer surface of the wrapping part to move along a preset path, thereby scraping off the marine organisms adhering to the outer surface of the upper part of the wrapping part. This reduces the rate of corrosion of the wrapping part, extends its service life, and eliminates the need for frequent manual maintenance, reducing the later maintenance costs of the wrapping part. At the same time, the anti-bending device for subsea pipelines has a relatively simple structure, reducing production input and being easy to use.

[0033] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the anti-bending device for a subsea pipeline in an embodiment of the present invention is shown;

[0036] Figure 2 This is a schematic diagram of the anti-bending device for a subsea pipeline in an embodiment of the present invention from another perspective;

[0037] Figure 3 A schematic diagram of the cleaning unit in an embodiment of the present invention is shown;

[0038] Figure 4A schematic diagram of the fixing component in an embodiment of the present invention is shown;

[0039] Figure 5 A schematic diagram of the anchor rod structure in an embodiment of the present invention is shown;

[0040] Figure 6 A schematic diagram of the assembly structure of the snap-fit ​​component in an embodiment of the present invention is shown.

[0041] In the diagram, 100 is the wrapping part; 110 is the upper shell; 111 is the upper connecting ear; 120 is the lower shell; 121 is the lower connecting ear; 130 is the fixing assembly; 131 is the rotating seat; 132 is the rotating plate; 1321 is the guide block; 133 is the anchor rod; 1331 is the pressure plate; 1332 is the positioning plate; 1333 is the second spring; 1334 is the guide groove; 134 is the locking seat; 140 is the locking assembly; and 141 is the locking seat. ; 1411, First groove; 1412, Sliding groove; 142, Fixed base; 1421, Second groove; 143, Rotating rod; 1431, Third spring; 1432, Push block; 200, Coating; 300, Cleaning section; 310, Limiting assembly; 311, Limiting block; 312, Guide rod; 313, First spring; 320, Scraping assembly; 321, Connecting plate; 322, Scraper; 323, Connecting rod. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Reference Figure 1 , Figure 2 and Figure 3A buckling prevention device for a subsea pipeline is provided, comprising a wrapping part 100 and a cleaning part 300. The wrapping part 100 is a hollow annular structure, forming a wrapping cavity inside for wrapping the subsea pipeline. The wrapping part 100 can wrap around the subsea pipeline to prevent buckling. Furthermore, both sides of the wrapping part 100 can be fixed to the seabed to position it, preventing displacement of the pipeline once it is wrapped around the designated location. A coating 200 is provided on the lower part and interior of the wrapping part 100 to prevent marine organisms from adhering to the lower part. The cleaning part 300 is located on the upper part of the wrapping part 100. At least one scraper 322 is provided on the cleaning part 300, and one side of the scraper 322 can abut against the outer surface of the wrapping part 100. Meanwhile, the cleaning unit 300 can drive the scraper 322 to move along a preset path under the disturbance of the ocean current, and the scraper 322, which abuts against the outer surface of the wrapping part 100, can repeatedly scrape the outer surface of the wrapping part 100, thereby removing any marine organisms that may be attached to the wrapping part 100 through the repeated scraping of the scraper 322. The coating 200 prevents marine organisms from attaching to the lower part of the covering section 100 or reduces the likelihood of such attachment. The cleaning section 300 scrapes off any marine organisms attached to the upper part of the covering section 100. Through the combined effect of the coating 200 and the cleaning section 300, the number of marine organisms attached to the covering section 100 is significantly reduced, thereby reducing corrosion and slowing the corrosion rate. This improves the corrosion resistance of the covering section 100, extending its service life. The covering section 100 can effectively prevent bending of the encased subsea pipeline for extended periods. Furthermore, its longer service life reduces the need for frequent maintenance, lowering long-term maintenance costs. Additionally, the anti-bending device for this subsea pipeline has a relatively simple structure, reducing production costs and making it more convenient to use.

[0044] Furthermore, referring to Figure 1 and Figure 2 The wrapping part 100 is a cylindrical hollow tube, which makes it easy to wrap the submarine pipeline.

[0045] It should be noted that the wrapping part 100 does not have to be cylindrical. The wrapping part 100 can also be rectangular or other shapes, as long as the wrapping cavity of the wrapping part 100 can fit the designated position of the submarine pipeline it is to wrap.

[0046] In some specific embodiments of the present invention, reference is made to... Figure 1 and Figure 2 The cleaning unit 300 can drive the scraper 322 to move around the axial direction of the wrapping part 100, wherein one side of the scraper 322 can abut against the outer surface of the wrapping part 100, thereby enabling the scraper 322 to scrape the outer surface of the wrapping part 100 along the axial direction of the wrapping part 100.

[0047] Furthermore, the cleaning unit 300 may drive the scraper 322 to move axially around the wrapping part 100, wherein one side of the scraper 322 may abut against the outer surface of the wrapping part 100, thereby enabling the scraper 322 to scrape the outer surface of the wrapping part 100 along the axial direction of the wrapping part 100.

[0048] It should be noted that the movement path of the scraper 322 is determined by the location and specific structure of the cleaning unit 300 on the wrapping unit 100. There are no strict requirements for the specific movement path of the scraper 322, as long as the movement of the scraper 322 can scrape the outer surface of the wrapping unit 100. This allows the structure of the anti-bending device for the subsea pipeline to be flexible and not confined to a fixed form, expanding the application range of the anti-bending device for the subsea pipeline, and facilitating later maintenance.

[0049] In some specific embodiments of the present invention, reference is made to... Figure 2 The cleaning unit 300 includes a limiting component 310 and a scraping component 320. The limiting component 310 is disposed on the outer surface of the upper part of the wrapping part 100. The scraping component 320 is movably disposed on the limiting component 310 and is movable along the axis of the limiting component 310. The axis of the limiting component 310 is parallel or perpendicular to the axis of the wrapping part 100. The limiting component 310 restricts the direction and range of movement of the scraping component 320, thereby guiding the scraping movement and enabling the scraping component 320 to move around or along the axis of the wrapping part 100. The scraper 322 is located on the side of the scraping assembly 320 near the wrapping part 100, so that one side of the scraper 322 can abut against the outer surface of the wrapping part 100. Through the movable connection between the scraping assembly 320 and the limiting assembly 310, the scraper 322 can also move around or along the axial direction of the wrapping part 100, which facilitates the scraping work.

[0050] Furthermore, the two ends of the limiting component 310 extend around the axial direction of the wrapping part 100 and are fixedly connected to the outer surface of the wrapping part 100, thereby enabling the scraping component 320 to drive the scraper 322 to move around the axial direction of the wrapping part 100.

[0051] Furthermore, both ends of the limiting component 310 extend along the axial direction of the wrapping portion 100 and are fixedly connected to the outer surface of the wrapping portion 100, thereby enabling the scraping component 320 to drive the scraper 322 to move along the axial direction of the wrapping portion 100. If the wrapping portion 100 is a cylindrical hollow tube, compared to extending both ends of the limiting component 310 around the axial direction of the wrapping portion 100, extending both ends of the limiting component 310 along the axial direction of the wrapping portion 100 makes it easier for the scraping component 320 to drive the scraper 322 to move smoothly.

[0052] It should be noted that since the anti-bending device of this subsea pipeline is applied to the seabed, its structure does not require other components that can drive the scraper assembly 320 to move. After the anti-bending device of the subsea pipeline is installed, the scraper assembly 320 can drive the scraper 322 to move under the propulsion of wind, waves, currents, etc., thus making the structure of the anti-bending device of the subsea pipeline simpler and easier to use.

[0053] In some specific embodiments of the present invention, reference is made to... Figure 3 The limiting component 310 includes a limiting block 311 and a guide rod 312. There are at least two limiting blocks 311, symmetrically arranged on the upper outer surface of the wrapping portion 100. There is at least one guide rod 312, each corresponding to one of the two symmetrically arranged limiting blocks 311. The guide rod 312 is positioned between the two limiting blocks 311 and is used to movably connect to the scraping component 320. Thus, the guide rod 312 can limit the movement direction of the scraping component 320, and the two symmetrically arranged limiting blocks 311 can limit the movement range of the scraping component 320.

[0054] Furthermore, two limiting blocks 311 are symmetrically arranged at both ends of the axial direction of the wrapping part 100, and a guide rod 312 is arranged between the two limiting blocks 311, so that the guide rod 312 is parallel to the axial direction of the wrapping part 100, so that the scraping assembly 320 can drive the scraper 322 to move along the axial direction of the wrapping part 100 through the guide rod 312.

[0055] Furthermore, two limiting blocks 311 are symmetrically arranged at both ends of the wrapping part 100 in the width direction, and the guide rod 312 is an arc shape adapted to the circumferential direction of the wrapping part 100. The guide rod 312 is arranged between the two limiting blocks 311, so that the guide rod 312 is parallel to the circumferential direction of the wrapping part 100, so that the scraping assembly 320 can drive the scraper 322 to move around the axial direction of the wrapping part 100 through the guide rod 312.

[0056] Furthermore, there are multiple limiting blocks 311, which are symmetrically arranged. There are also multiple guide rods 312, each guide rod 312 corresponding to two symmetrical limiting blocks 311. The guide rods 312 are located between the two limiting blocks 311. All the guide rods 312 can be movably connected to the scraping assembly 320, thereby ensuring the stability of the scraping assembly 320 when it drives the scraper 322 to move.

[0057] Furthermore, there are four limit blocks 311 and two guide rods 312, which can ensure the stability of the movement of the scraping assembly 320 while maintaining a simple structure.

[0058] Furthermore, a first spring 313 is provided on the limiting block 311, with one end of the first spring 313 being closer to the limiting block 311. The first spring 313 is also sleeved on the outer periphery of the guide rod 312. When the scraping assembly 320 is about to contact the limiting block 311, the first spring 313 can buffer the collision between the scraping assembly 320 and the limiting block 311, avoiding wear.

[0059] In some specific embodiments of the present invention, reference is made to... Figure 3 The scraping assembly 320 includes at least one connecting plate 321. A guide rod 312 passes through the connecting plate 321, allowing the connecting plate 321 to slide on the guide rod 312. If both ends of the guide rod extend along the axial direction of the wrapping portion 100, the connecting plate 321 is an arc shape adapted to the circumferential direction of the wrapping portion 100, and the scraper 322 is also an arc shape adapted to the circumferential direction of the wrapping portion 100. The scraper 322 is disposed on the inner arc side of the connecting plate 321 near the wrapping portion 100, allowing the inner arc of the scraper 322 to abut against the outer surface of the wrapping portion 100. If the two ends of the guide extend around the axial direction of the wrapping part 100, the connecting plate 321 is a rectangle adapted to the axial direction of the wrapping part 100, and the scraper 322 is also a rectangle adapted to the axial direction of the wrapping part 100. The scraper 322 is disposed on the side of the connecting plate 321 near the wrapping part 100, so that the bottom side of the scraper 322 can abut against the outer surface of the upper side of the wrapping part 100. The connecting plate 321, which is slidably disposed on the guide rod 312, can drive the scraper 322 to move under the pushing action of wind, waves, currents, etc., and can stop moving when it contacts the first spring 313. The structure is simple, easy to replace and repair, and can remove marine organisms on the wrapping part 100 by scraping the scraper 322, while avoiding structural redundancy.

[0060] Furthermore, there are multiple connecting plates 321, which are evenly and parallelly arranged. Guide rods 312 are sequentially inserted through the multiple connecting plates 321, allowing each connecting plate 321 to slide on the guide rods 312. A connecting rod 323 is fixedly installed between each pair of adjacent connecting plates 321, securing them together. The relative positions of the multiple connecting plates 321 are fixed by the multiple connecting rods 323, allowing them to move together. There are also multiple scrapers 322, each corresponding to one of the multiple connecting plates 321. This allows multiple scrapers 322 to be positioned on the upper part of the covering part 100, abutting against the outer surface of the covering part 100. The multiple connecting plates 321 can drive the multiple scrapers 322 to move together, ensuring a scraping effect and improving the efficiency and effectiveness of cleaning attached marine organisms.

[0061] In some specific embodiments of the present invention, reference is made to... Figure 1 and Figure 2 The enclosing section 100 includes an upper shell 110 and a lower shell 120. The upper shell 110 and the lower shell 120 are detachably connected and can be closed to form an enclosing cavity. In use, the upper shell 110 and the lower shell 120 are symmetrically placed over designated positions on the subsea pipeline to complete the enclosing of the subsea pipeline. The upper shell 110 has upper connecting ears 111 on both sides in the width direction, and the lower shell 120 has lower connecting ears 121 on both sides in the width direction. The upper connecting ears 111 and the lower connecting ears 121 are symmetrical to each other, allowing the upper shell 110 and the lower shell 120 to be threadedly connected by bolts and nuts, facilitating installation and disassembly, and preventing loosening after installation.

[0062] Furthermore, coating 200 is disposed on the outer and inner surfaces of the lower housing 120. Coating 200 can also be disposed on the inner surface of the upper housing 110.

[0063] Furthermore, both the upper shell 110 and the lower shell 120 are arc-shaped structures, which facilitates the formation of a wrapping cavity to enclose the subsea pipeline.

[0064] In some specific embodiments of the present invention, reference is made to... Figure 1 and Figure 2 The enclosure 100 also includes a fixing component 130. The fixing component 130 is disposed on both sides of the lower shell 120 or the upper shell 110 in the width direction. The end of the fixing component 130 away from the lower shell 120 or the upper shell 110 can be driven into the seabed, so that the setting position on the seabed can be fixed by the fixing component 130.

[0065] Furthermore, there are multiple fixing components 130, which are symmetrically and evenly arranged on both sides of the upper shell 110 or the lower shell 120 in the width direction. The connection stability between the upper shell 110 and the lower shell 120 and the seabed can be enhanced by the multiple fixing components 130.

[0066] Furthermore, the fixing component 130 is rotatably connected to the upper shell 110 or the lower shell 120, thereby facilitating the rotation and retraction of the fixing component 130. Simultaneously, when installed in the sea, if the upper shell 110 or the lower shell 120 is affected by factors such as wind, waves, or currents, causing a shift in their position relative to the seabed pipeline, the shift in the upper shell 110 or the lower shell 120 will not affect the fixed connection between the fixing component 130 and the seabed because the fixing component 130 is rotatably connected to the upper shell 110 or the lower shell 120.

[0067] In some specific embodiments of the present invention, both the upper shell 110 and the lower shell 120 are made of sacrificial anode material. This allows the entire anti-bending device of the subsea pipeline to use bracelet-type sacrificial anodes for cathodic protection, achieving both the purpose of preventing the subsea pipeline from buckling and the effect of cathodic protection, greatly improving corrosion resistance.

[0068] In some specific embodiments of the present invention, reference is made to... Figure 4 and Figure 5 The fixing assembly 130 includes a rotating seat 131, a rotating plate 132, an anchor rod 133, and a locking seat 134. The rotating seat 131 is fixedly disposed on the side of the lower housing 120, and has a U-shaped structure, allowing one end of the rotating plate 132 to be rotatably connected to the opening of the rotating seat 131 via a rotating pin. The locking seat 134 is also disposed on the side of the lower housing 120, adjacent to the rotating seat 131. The locking seat 134 also has a U-shaped structure, and the rotating plate 132 can engage with the opening of the locking seat 134, thereby fixing the rotating plate 132 and enabling the fixing assembly 130 to be extended and retracted. The anchor rod 133 is vertically disposed at the end of the rotating plate 132 away from the rotating seat 131. By hammering the anchor rod 133, it can be inserted into the seabed, facilitating installation.

[0069] Furthermore, the anchor bolt 133 is connected to the rotating plate 132 by a second spring 1333, which can improve the buffering performance and enhance the overall stability.

[0070] Furthermore, the rotating plate 132 has a through hole for the anchor rod 133 to pass through. A guide groove 1334 is formed on the anchor rod 133 along its axial direction, and a guide block 1321 is provided on the inner wall of the through hole, which is slidably connected to the guide groove 1334. This enhances installation stability, preventing the anchor rod 133 from easily detaching from the seabed due to factors such as wind, waves, and currents.

[0071] Furthermore, a pressure plate 1331 is provided at the top of the anchor bolt 133 to facilitate hammering the anchor bolt 133. A positioning plate 1332 is provided around the outer wall of the anchor bolt 133 to determine whether the anchor bolt 133 is fixed in place with the seabed. A second spring 1333 is provided between the positioning plate 1332 and the rotating plate 132. The second spring 1333 is sleeved on the outer circumferential surface of the anchor bolt 133, further improving the cushioning performance.

[0072] In some specific embodiments of the present invention, reference is made to... Figure 2 A snap-fit ​​assembly 140 is also provided between the upper connecting ear 111 and the lower connecting ear 121. The snap-fit ​​assembly 140 can snap the upper connecting ear 111 and the lower connecting ear 121 together, thereby making the connection between the upper housing 110 and the lower housing 120 more secure.

[0073] In some specific embodiments of the present invention, reference is made to... Figure 6 The snap-fit ​​assembly 140 includes a fixing base 142 and a snap-fit ​​base 141. The fixing base 142 is fixedly disposed on the side of the lower connecting ear 121. The snap-fit ​​base 141 has an L-shaped structure and is rotatably connected to the fixing base 142. By rotating the snap-fit ​​base 141, one side of the snap-fit ​​base 141 can snap onto the side of the upper connecting ear 111, thereby realizing the snap-fit ​​between the upper connecting ear 111 and the lower connecting ear 121.

[0074] Furthermore, the two ends of the snap-fit ​​base 141 are respectively provided with first grooves 1411. The fixing base 142 is provided with a rotating cavity that can accommodate the snap-fit ​​base 141, and the inner sidewalls of both ends of the fixing base 142 are respectively provided with second grooves 1421 corresponding to the first grooves 1411. The first grooves 1411 and the second grooves 1421 are directly opposite each other, and a rotating rod 143 is inserted into the first grooves 1411 and the second grooves 1421. With this simple structure, the snap-fit ​​base 141 can be rotated.

[0075] Furthermore, a third spring 1431 is provided between the rotating rod 143 and the bottom of the first groove 1411. The third spring 1431 not only facilitates the installation of the rotating rod 143, but also enhances the connection stability between the rotating rod 143 and the first groove 1411 and the second groove 1421 under the elastic action of the third spring 1431.

[0076] Furthermore, a sliding groove 1412 is formed on one side of the first groove 1411 along the axial direction of the rotating rod 143. A push block 1432 is provided on the rotating rod 143 along the radial direction of the rotating rod 143. One end of the push block 1432 is fixedly connected to the outer wall of the rotating rod 143, and the other end passes through the sliding groove 1412. By pushing the push block 1432, the rotating rod 143 can be moved, causing the third spring 1431 to be compressed, so as to facilitate the installation of the rotating rod 143.

[0077] Procedure for using anti-bending devices in subsea pipelines:

[0078] Push the push block 1432 towards the bottom of the first groove 1411. The rotating rod 143 moves synchronously within the first groove 1411, compressing the third spring 1431. Then, the L-shaped snap-fit ​​seat 141 is placed into the rotating cavity of the fixed seat 142, aligning the first groove 1411 and the second groove 1421. Release the push block 1432, and under the rebound force of the third spring 1431, push the rotating rod 143 into the second groove 1421 of the fixed seat 142. Rotate the upper housing 110 to wrap the lower housing 120 and the upper housing 110 around the designated position on the outside of the subsea pipeline. Insert bolts into the lower connecting lug 121 and the upper connecting lug 111, and tighten them with nuts to complete the installation of the lower housing 120 and the upper housing 110 on the outside of the subsea pipeline. The lower surface of the lower housing 120 is coated with a coating 200 to prevent marine organisms. Rotate the rotating plate 132 to remove it from the mounting base 134, then tap the pressure plate 1331 downwards to insert the anchor rod 133 into the seabed until the positioning plate 1332 is in contact with the seabed. Simultaneously, the guide block 1321 slides within the guide groove 1334, acting as a limit. As the anchor rod 133 descends, the second spring 1333 is compressed, enhancing the stability of the installation. Under the action of the water flow, the connecting plate 321, connecting rod 323, and scraper 322 swing along the trajectory of the guide post, thereby scraping off marine organisms attached to the outer surface of the upper shell 110, achieving a cleaning purpose, reducing corrosion, and extending service life.

[0079] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A buckling prevention device for a subsea pipeline, characterized in that, include: The wrapping part has a wrapping cavity inside for wrapping the submarine pipeline, and the two sides of the wrapping part can be positioned on the seabed. The lower part of the package is provided with a coating to prevent marine organisms from attaching. A cleaning section is disposed on the upper part of the packaging section; The cleaning part is provided with at least one scraper, one side of which can abut against the outer surface of the wrapping part; The cleaning unit can drive the scraper to move along a preset path under the disturbance of ocean currents. The scraper can scrape the outer surface of the package to remove marine organisms attached to the package.

2. The anti-bending device for a subsea pipeline according to claim 1, characterized in that, The cleaning unit is capable of driving the scraper to move axially around the wrapping unit under the disturbance of ocean currents; Alternatively, the cleaning unit can drive the scraper to move axially along the wrapping unit.

3. The anti-bending device for a subsea pipeline according to claim 2, characterized in that, The cleaning unit includes: A limiting component is disposed on the outer surface of the upper part of the wrapping part to limit the moving direction and moving range of the scraper; A scraping assembly, wherein the scraping assembly is movably disposed on the limiting assembly, and the scraping assembly is movable along the axial direction of the limiting assembly; The scraper is positioned on the side of the scraping assembly near the wrapping portion.

4. The anti-bending device for a subsea pipeline according to claim 3, characterized in that, The two ends of the limiting component extend along the axial direction of the wrapping portion, so that the scraping component can move along the axial direction of the wrapping portion.

5. The anti-bending device for a subsea pipeline according to claim 3, characterized in that, The two ends of the limiting component extend axially around the wrapping portion, so that the scraping component can move axially around the wrapping portion.

6. The anti-bending device for a subsea pipeline according to any one of claims 3-5, characterized in that, The limiting component includes: There are at least two limiting blocks, and the two limiting blocks are symmetrically arranged on the outer surface of the upper part of the wrapping part. At least one guide rod is provided, which is disposed between the two limiting blocks and is used to movably connect the scraping assembly.

7. The anti-bending device for a subsea pipeline according to claim 6, characterized in that, The scraping assembly includes: There is at least one connecting plate, which is slidably disposed on the guide rod; The scraper is located on the side of the connecting plate near the wrapping part.

8. The anti-bending device for a subsea pipeline according to claim 7, characterized in that, There are multiple connecting plates, which are evenly arranged among each other, and a connecting rod is provided between each two adjacent connecting plates to fix the relative positions of the multiple connecting plates. There are multiple scrapers, and each of the multiple scrapers is set in a one-to-one correspondence with a multiple connecting plate.

9. The anti-bending device for a subsea pipeline according to claim 1, characterized in that, The package includes: Upper casing; The lower housing is detachably connected to the upper housing, and the upper housing and the lower housing can be closed to form the enclosing cavity; A fixing component is disposed on both sides of the lower shell or the upper shell for fixing to the seabed.

10. The anti-bending device for a subsea pipeline according to claim 9, characterized in that, Both the upper and lower housings are made of sacrificial anode material.

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