Subsea pipeline catenary support apparatus and adjustable support mechanism

Abstract

This utility model discloses a subsea pipeline suspension support device and an adjustable support mechanism. The adjustable support mechanism includes: a top support plate, which is detachably connected to the support frame of the subsea pipeline suspension support device; an adjusting column, which is disposed on the top support plate; and an adjusting plate, which is installed above the top support plate via an adjusting assembly, and whose distance from the top support plate in the height direction is adjusted by the adjusting assembly. This solves the suspension phenomenon caused by subsea pipelines during use, improves pipeline operation safety, and enables adjustment of the support height.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment technology for subsea construction, specifically to a pipeline suspension support device and an adjustable support mechanism. Background Technology

[0002] Submarine pipelines are important marine engineering facilities widely used in various fields, primarily for transporting various fluids and gases. Submarine pipeline suspension refers to the phenomenon where a submarine pipeline is suspended in mid-air due to the lack of effective support from the seabed. During operation, submarine pipelines can experience suspension due to factors such as uneven seabed and erosion from ocean currents. This suspension condition increases the fatigue load on the pipeline, reduces its integrity, and thus poses a threat to its safe operation.

[0003] When improving the suspension of subsea pipelines using pipeline suspension support devices, a gap must be reserved between the support device and the pipeline to be supported in order to reduce the difficulty of operation. In addition, it is usually impossible to accurately determine the height that the support device needs to support, and the height will also change to a certain extent as the equipment's service life extends (for example, the height that sinks into the seabed sediment increases). Therefore, how to achieve fine-tuning of the support height during the installation or subsequent maintenance of the pipeline suspension support device has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] Therefore, this utility model provides a subsea pipeline suspension support device and an adjustable support mechanism to at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An adjustable support mechanism for a subsea pipeline suspension support device, the adjustable support mechanism comprising:

[0007] A top support plate, which is detachably connected to the support frame of the subsea pipeline suspension support device;

[0008] An adjusting column is provided on the top support plate;

[0009] An adjusting plate is mounted above the top support plate via an adjusting assembly, and the distance between the adjusting plate and the top support plate in the height direction is adjusted via the adjusting assembly.

[0010] The components of the top support plate, the adjusting column, and the adjusting plate are all made of non-metallic materials.

[0011] During installation, after the subsea pipeline suspension support device is in place, the distance between the adjusting plate and the top support plate is adjusted using the adjusting components. This allows the adjusting plate to be adjusted upwards and firmly pressed against the upper component, thus effectively supporting the subsea pipeline. During use, if the distance between the top support plate and the adjusting plate increases, the adjusting plate can be raised again using the adjusting components, allowing for fine-tuning of the support height during installation or subsequent maintenance. Furthermore, all components are made of non-metallic materials to prevent electrochemical reactions between them and the subsea pipeline in seawater, thus avoiding corrosion.

[0012] In some embodiments, the adjustment assembly includes a block group and a retaining ring, wherein there are at least two block groups, each block group is arranged in a cylindrical structure in the circumferential direction, and each block group is fastened to the retaining ring;

[0013] Each of the pad groups includes multiple pads, and each pad can be selectively inserted between the adjusting column and the adjusting plate to increase or decrease the distance between the adjusting plate and the top support plate.

[0014] In some embodiments, the adjusting column includes a thick section and a thin section, the thick section being mounted on the upper surface of the top support plate, and the thin section being mounted on the top end of the thick section;

[0015] The thick section has a strip groove along its height direction, and the thin section has a radially penetrating pin hole on its side. Each of the pad groups is sleeved on the thin section and / or the thick section, and the bottom of the pad is supported on the step formed on the top of the thick section.

[0016] In some embodiments, the pads are stacked in the height direction, and each pad includes a rigid portion, an elastic layer covering the outside of the rigid portion, and a limiting shaft mounted on the elastic layer.

[0017] In some embodiments, the retaining ring is a detachable two-piece structure. The retaining ring has a plurality of shaft holes along the height direction, and the limiting shaft passes through the shaft holes one by one. The bottom of the retaining ring is provided with a limiting protrusion. The retaining ring is movably sleeved on the adjusting column in the height direction, and the limiting protrusion is slidably installed in the strip groove.

[0018] In some embodiments, the lower surface of the adjusting plate is provided with a mounting post, the mounting post is provided with a first retaining ring in the circumferential direction, there are multiple mounting posts, and reinforcing ribs are provided between adjacent mounting posts; a second retaining ring is provided at the top of the retaining ring, and the first retaining ring and the second retaining ring are fitted and fixed together.

[0019] In some embodiments, the adjustment plate is laterally mounted with a robotic gripper.

[0020] In some embodiments, the upper surface of the adjusting plate is provided with a recess coaxially arranged with the mounting column, the recess has a through groove on its side, and the upper surface of the adjusting plate is provided with an assembly hole.

[0021] In some embodiments, a through hole is formed in the mounting post, the adjusting post passes through the through hole, and a horizontally arranged pin is inserted into a pin hole formed in the thin section, and the pin is engaged in the through groove.

[0022] This utility model also provides a subsea pipeline suspension support device, including:

[0023] A support frame, comprising multiple detachably connected support modules, wherein each support module is spliced ​​together in the height direction to obtain a support frame of a preset height;

[0024] A top support, which is detachably mounted on the top of the support frame, includes the adjustable support mechanism described above;

[0025] The bottom support is detachably installed at the bottom of the support frame and fixed in the seabed sediment. Attached Figure Description

[0026] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0027] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0028] Figure 1 One of the structural schematic diagrams of the subsea pipeline suspension support device provided by this utility model;

[0029] Figure 2 This is the second structural schematic diagram of the subsea pipeline suspension support device provided by this utility model;

[0030] Figure 3 This is one of the structural schematic diagrams of the top support in the subsea pipeline suspension support device provided by this utility model;

[0031] Figure 4 This is the second schematic diagram of the top support structure in the subsea pipeline suspension support device provided by this utility model;

[0032] Figure 5 One of the structural schematic diagrams of the top support plate and support column provided by this utility model;

[0033] Figure 6 This is the second structural schematic diagram of the top support plate and support column provided by this utility model.

[0034] Figure 7 One of the structural schematic diagrams of the adjustable support mechanism in the top support provided by this utility model;

[0035] Figure 8 The second schematic diagram shows a portion of the adjustable support mechanism in the top support provided by this utility model.

[0036] Figure 9 This is one of the structural schematic diagrams of the adjustable plate in the adjustable support mechanism provided by this utility model;

[0037] Figure 10 This is the second schematic diagram of the adjustable plate in the adjustable support mechanism provided by this utility model.

[0038] Figure 11 This is the third partial structural schematic diagram of the adjustable support mechanism provided by this utility model;

[0039] Figure 12 Fourth schematic diagram of a portion of the adjustable support mechanism provided by this utility model;

[0040] Figure 13 This is one of the partial structural schematic diagrams of the adjustable component of the adjustable support mechanism provided by this utility model;

[0041] Figure 14 This is the second partial structural schematic diagram of the adjusting component of the adjustable support mechanism provided by this utility model;

[0042] Figure 15 This is a schematic diagram of the structure of the support module provided by this utility model;

[0043] Figure 16 This is a schematic diagram of the structure of the lateral support member in the support module provided by this utility model;

[0044] Figure 17 This is a structural schematic diagram of the intermediate connecting member in the support module provided by this utility model.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Subsea pipeline awaiting support;

[0047] 1. Support frame;

[0048] 11. Support module;

[0049] 111. Intermediate connector; 1111. Main frame; 1112. Reinforcing rib; 1113. Mounting hole;

[0050] 112. Lateral support component; 1121. Support column; 1122. Support rib;

[0051] 2. Top support;

[0052] 21. Top support plate; 22. Adjusting column; 23. Adjusting plate; 24. Adjusting assembly; 25. Pin; 26. Top pressure plate; 27. Eccentric arc plate.

[0053] 211. Install protrusions; 212. Grid ribs;

[0054] 221. Coarse section; 222. Fine section; 223. Strip groove; 224. Pin hole; 225. Step; 226. Recess.

[0055] 231. Mounting column; 2311. First retaining ring; 232. Reinforcing rib; 233. Robot gripper handle;

[0056] 234. Recess; 235. Through groove; 236. Assembly hole;

[0057] 241, pad block; 2411, rigid part; 2412, elastic layer; 2413, limiting shaft;

[0058] 242, retaining ring; 2421, shaft hole; 2422, limiting protrusion; 2423, second retaining ring;

[0059] 271. Limiting teeth;

[0060] 3. Bottom support;

[0061] 31. Bottom support plate; 32. Support leg; 33. Limiting rib plate. Detailed Implementation

[0062] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0063] In one specific implementation, such as Figures 1-17 As shown, the subsea pipeline suspension support device provided by this utility model includes a support frame 1, a top support 2, and a bottom support 3; wherein, the support frame 1 includes multiple detachably connected support modules 11, and each support module 11 is spliced ​​in the height direction to obtain a support frame 1 of a preset height; the top support 2 is detachably installed on the top of the support frame 1, and the bottom support 3 is detachably installed on the bottom of the support frame 1 and fixed in the seabed sediment; wherein, the components of the top support plate, the adjusting column, and the adjusting plate are all made of non-metallic materials.

[0064] During use, a suitable number of support modules 11 are selected and spliced ​​according to the actual span height of the subsea pipeline. Each support module 11 is fixed to the adjacent module until the required preset height is reached. The top support 2 is installed on the highest support module 11, and the bottom support 3 is installed on the lowest support module 11. The entire support device is then sent to the underwater span position. The bottom support 3 is fixed in the seabed sediment, and the top support 2 is used to support the subsea pipeline, thus achieving span support. This modular design allows the height of the support frame 1 to be flexibly adjusted according to actual needs, improving the adaptability and versatility of the device. The detachable connection method facilitates installation and maintenance, reducing construction costs.

[0065] Specifically, the bottom support 3 includes a bottom support plate 31, support legs 32, and limiting ribs 33. The bottom support plate 31 has mounting bosses, and the bottom of the support frame 1 is fixedly connected to the bottom support plate 31 via these mounting bosses. The support legs 32 are installed on the bottom of the bottom support plate 31 and inserted into the seabed sediment. The limiting ribs 33 are formed on the upper surface of the bottom support plate 31. The design of the bottom support plate 31 provides a stable support foundation, and the insertion of the support legs 32 into the seabed sediment enhances the device's anti-overturning ability and stability. The limiting ribs can be configured as a grid structure, confining the support frame 1 within the grid. This not only improves the strength of the bottom support plate 31 but also prevents displacement of the support frame 1.

[0066] Furthermore, there are multiple support legs 32, which are arranged in an array on the lower surface of the bottom support plate 31. The array arrangement of multiple support legs 32 can distribute the supporting force, reduce the load on a single support leg 32, resist ocean current interference, and improve the stability and reliability of the device, making it particularly suitable for areas with complex seabed topography.

[0067] To improve the ease of inserting the support leg 32 into the seabed sediment, the support leg 32 is a conical structure. The larger cross-section of the conical structure is fixed to the lower surface of the bottom support plate 31. When inserting into the seabed sediment, the smaller end enters the sediment first, thereby increasing the pressure per unit area and reducing the difficulty of insertion.

[0068] The aforementioned support frame 1 adopts a modular structure. The number of support modules 11 used in the support frame 1 can be determined according to the actual height required for adjustment. The number and type of structural components in each support module 11 can be the same or different, and can be flexibly matched and selected according to the usage needs. Specifically, the support module 11 includes an intermediate connector 111 and lateral support components 112; wherein, the intermediate connector 111 has at least two layers, the intermediate connector 111 located at the top layer is detachably connected to the top support 2, and the intermediate connector 111 located at the bottom layer is detachably connected to the bottom support 3; there are multiple lateral support components 112, each of which is located between adjacent intermediate connectors 111 in the height direction, and each of which surrounds the side of the intermediate connector 111 in the circumferential direction; one end of the lateral support component 112 is detachably connected to the intermediate connector 111 located above it, and the other end is detachably connected to the intermediate connector 111 located below it. The height of the lateral support 112 can be of various specifications in different support modules 11. During use, the appropriate height of the lateral support 112 can be selected to form the support module 11, and different height combinations can be used to better adapt to the required support height.

[0069] The modular support frame 1 not only has high structural strength and stability, and can withstand large loads, but is also easy to install and maintain. The modules can be combined in a flexible and diverse manner, which improves the adaptability and versatility of the device.

[0070] The intermediate connector 111 includes a main frame 1111, reinforcing ribs 1112, and mounting holes 1113. The reinforcing ribs 1112 are installed within the main frame 1111, and the mounting holes 1113 are located on the outer periphery of the main frame 1111. The main frame 1111, the reinforcing ribs 1112, and the mounting holes 1113 form a single, integrally molded structure. The main frame 1111 provides overall support for the intermediate connector 111. The reinforcing ribs 1112 within the main frame 1111 enhance the support strength. The mounting holes 1113 allow for detachable connections between the intermediate connector 111 and the lateral support 112, between the intermediate connector 111 and the top support 2, and between the intermediate connector 111 and the bottom support 3. Simultaneously, the integrally molded structure improves the overall strength and rigidity of the intermediate connector 111, reduces the number of connection points, and lowers the structural complexity and manufacturing cost.

[0071] Specifically, the lateral support 112 includes support columns 1121 and support ribs 1122. There are at least two support columns 1121. One end of each support column 1121 is detachably inserted into the mounting hole 1113 of the intermediate connector 111 located above it, and the other end of each support column 1121 is detachably inserted into the mounting hole 1113 of the intermediate connector 111 located below it. The support ribs 1122 are installed between two adjacent support columns 1121.

[0072] During installation, a suitable number and height of support columns 1121 are selected and spliced ​​according to the required height. The support columns 1121 are fixed in the mounting holes 1113 of the intermediate connector 111 by insertion. Support ribs 1122 are installed between adjacent support columns 1121 to provide additional stability and effectively prevent the support frame 1 from deforming under lateral forces. A tight connection between the two is achieved by controlling the end shaft diameter of adjacent support columns 1121 and the inner diameter of the holes in the intermediate connector 111. Adhesive can be used to enhance the reliability of the connection if necessary.

[0073] Furthermore, the intermediate connector 111 and support 112 can be extended to the periphery, and the number of support columns 1121, support ribs 1122 and mounting holes 1113 can be increased to achieve a larger support area.

[0074] In actual use, in order to reduce the difficulty of operation, a gap must be reserved between the support device and the subsea pipeline 100 to be supported. In addition, it is usually impossible to accurately determine the height that the support device needs to support, and as the equipment's service life is extended, it will also lead to a certain degree of height change (for example, the height that sinks into the seabed mud and sand increases). Therefore, it is necessary to be able to make fine adjustments to the height during the equipment installation process or subsequent maintenance. To achieve this objective, the top support 2 includes an adjustable support mechanism, a top pressure plate 26, and an eccentric arc plate 27. The adjustable support mechanism includes a top support plate 21, an adjusting column 22, and an adjusting plate 23. The top support plate 21 is detachably connected to the support frame 1. The lower surface of the top support plate 21 is provided with mounting protrusions 211, which are embedded in the mounting holes 1113 of the support module 1 to achieve a detachable connection between the top support plate 21 and the support frame 1. The lower surface of the top support plate 21 is also provided with horizontally and vertically distributed grid ribs 212 to enhance the support strength of the top support plate 21 and to help limit the lateral movement between the support frame 1 and the top support plate 21, preventing slippage. The adjusting column 22 is disposed on the top support plate 21. The adjusting plate 23 is mounted above the top support plate 21 via an adjusting assembly 24, and its distance from the top support plate 21 in the height direction is adjusted by the adjusting assembly 24.

[0075] Specifically, the adjusting component 24 includes a pad group and a retaining ring 242. There are at least two pad groups, each forming a cylindrical structure in the circumferential direction. Each pad group includes multiple pads 241, which are stacked in the height direction. Each pad 241 includes a rigid part 2411, an elastic layer 2412 covering the outside of the rigid part 2411, and a limiting shaft 2413 mounted on the elastic layer 2412. The limiting shafts 2413 pass through shaft holes 2421 on the retaining ring 242 in a corresponding manner. The retaining ring 242... The ring 242 is a detachable two-piece structure. Each of the pad groups is fastened inside the retaining ring 242. The retaining ring 242 has several shaft holes 2421 along the height direction. The bottom of the retaining ring 242 is provided with a limiting protrusion 2422. The retaining ring 242 is movably sleeved on the adjusting post 22 in the height direction. The limiting protrusion 2422 is slidably installed in the strip groove 223. The lower surface of the adjusting plate 23 is provided with a mounting post 231. The mounting post 231 has a first retaining ring 2311 circumferentially formed. There are multiple mounting posts 231, adjacent to each other. Reinforcing ribs 232 are provided between the mounting columns 231; a second retaining ring 2423 is provided at the top of the retaining ring 242, and the first retaining ring 2311 and the second retaining ring 2423 are fitted and fixed together; the adjusting column 22 includes a thick section 221 and a thin section 222, the thick section 221 is installed on the upper surface of the top support plate 21, and the thin section 222 is installed at the top of the thick section 221; a strip groove 223 is formed along the height direction on the thick section 221, and a radially penetrating pin hole 224 is formed on the side of the thin section 222; each of the pad groups is sleeved on the thin section 222. The upper part is supported by a bottom support 3 on a step 225 formed on the top of the thick section 221; a robot gripper 233 is mounted on the side of the adjusting plate 23, and a recess 234 is provided on the upper surface of the adjusting plate 23, which is coaxially arranged with the mounting post 231. The recess 234 has a through groove 235 on its side, and an assembly hole 236 is opened on the upper surface of the adjusting plate 23; a through hole is opened in the mounting post 231, the adjusting post 22 passes through the through hole, and a horizontally arranged pin 25 is inserted into the pin hole 224 opened on the thin section 222. The pin 25 is locked in the through groove 235.

[0076] Furthermore, the top support 2 also includes a top pressure plate 26 and an eccentric arc plate 27. The top pressure plate 26 is installed above the adjusting plate 23, and the eccentric arc plate 27 is installed above the top pressure plate 26. The thickness of the eccentric arc plate 27 gradually decreases along the arc direction. Multiple limiting teeth 271 are provided at the bottom of the eccentric arc plate 27, and the limiting teeth 271 are engaged and fixed with a stop rod. The subsea pipeline 100 is placed on the eccentric arc plate 27. During installation, the position of the eccentric arc plate 27 is rotated and adjusted according to the actual span height of the subsea pipeline to ensure close contact with the pipeline. The engagement and fixation of the limiting teeth 271 with the stop rod ensures that the eccentric arc plate 27 will not retract when supporting the pipeline.

[0077] During operation, based on the required support height of the subsea pipeline 100 to be supported, appropriate specifications and quantities of support modules 11 are selected and assembled into a support frame 1 on the deck of the working vessel. The support frame 1 is then assembled with the bottom support 3 and the top support 2 to complete the overall setup. With the assistance of an underwater robot or diver, the assembled device is positioned below the subsea pipeline to be supported. To facilitate operation, a certain height is reserved between the top support 2 and the subsea pipeline 100. The underwater robot or diver places the eccentric arc plate 27 between the bottom of the subsea pipeline 100 and the top pressure plate 26, and rotates and adjusts the position of the eccentric arc plate to ensure close contact with the subsea pipeline 100. The gravity of the subsea pipeline 100 is transferred to the seabed through the top support 2, support frame 1, and bottom support 3, achieving the supporting effect. Changing the height of the top support 2 provides upward support for the subsea pipeline and allows the bottom support 3 to penetrate the seabed sediment to a certain depth.

[0078] The subsea pipeline 100, relative to its initial position, should be lifted upwards to form a reliable support with the seabed. The sum of the pipeline's lifting height and the bottom support's downward displacement height relative to the initial position is H, where H > 0 and < the cumulative total height of all layers of pad blocks 241.

[0079] The method for changing the height of the top support 2 is as follows: Remove the pin 25, and an underwater robot or diver takes a tool jack (sold separately) underwater. Place the jack between the top support plate 21 and the adjusting plate 23, with the jack base placed in the recess 226. The jack push rod pushes the adjusting plate 23 upward. The underwater robot or diver operates the jack to lift the adjusting plate 23. As the adjusting plate 23 is lifted, the first retaining ring 2311 drives the retaining ring 242 to rise synchronously. When the lifting height exceeds the height of the top layer pad 241, the rigid part 2411 moves inward under the push of the elastic layer 2412 until the inner diameter of the rigid part 2411 and the thin section 22 are aligned. 2. When the outer diameter contacts, the movement stops. The elastic layer 2412 fills the gap between the rigid part 2411 and the retaining ring 242. At this time, the bottom of the top pad 241 contacts the top of the thick section 221, and the top of the top pad 241 has a small gap or contact with the bottom of the mounting column 231. If the jack is removed at this time, under the gravity of the adjusting plate 23 and its upper components, the adjusting plate 23 moves downward and eventually makes the bottom of the mounting column 231 fall on the top of the top pad 241, thereby raising the height of the adjusting plate 23 and achieving a supporting function. Similarly, when the height of the adjusting plate 23 exceeds the height of one pad 241, one pad 241 is pushed into the interior to achieve support. The jack is operated by an underwater robot or diver to continue to increase the distance between the adjusting plate 23 and the top support plate 21 until the subsea pipeline 100 to be supported is raised to a suitable height and the bottom support 3 is deeply embedded in the mud and sand. The jacks are removed by an underwater robot or diver and retrieved to the work vessel. As the supporting subsea pipeline 100 and adjusting plate 23 fall back under gravity, the weight is transmitted downwards through layers of internal pads 241 until it reaches the boss of the thick section 221, thus achieving the supporting function. Alternatively, other loading tools can be used instead of the jacks.

[0080] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this utility model should be included within the scope of protection of this utility model.

Claims

1. An adjustable support mechanism for a subsea pipeline suspension support device, characterized in that, The adjustable support mechanism includes: A top support plate, which is detachably connected to the support frame of the subsea pipeline suspension support device; An adjusting column is provided on the top support plate; An adjusting plate is mounted above the top support plate via an adjusting assembly, and the distance between the adjusting plate and the top support plate in the height direction is adjusted via the adjusting assembly. The components of the top support plate, the adjusting column, and the adjusting plate are all made of non-metallic materials.

2. The adjustable support mechanism according to claim 1, characterized in that, The adjustment assembly includes a block group and a retaining ring. There are at least two block groups, each block group is arranged in a cylindrical structure in the circumferential direction, and each block group is fastened to the retaining ring. Each of the pad groups includes multiple pads, and each pad can be selectively inserted between the adjusting column and the adjusting plate to increase or decrease the distance between the adjusting plate and the top support plate.

3. The adjustable support mechanism according to claim 2, characterized in that, The adjusting column includes a thick section and a thin section. The thick section is installed on the upper surface of the top support plate, and the thin section is installed at the top of the thick section. The thick section has a strip groove along its height direction, and the thin section has a radially penetrating pin hole on its side. Each of the pad groups is sleeved on the thin section and / or the thick section, and the bottom of the pad is supported on the step formed on the top of the thick section.

4. The adjustable support mechanism according to claim 3, characterized in that, The pads are stacked in the height direction. Each pad includes a rigid part, an elastic layer covering the outside of the rigid part, and a limiting shaft mounted on the elastic layer.

5. The adjustable support mechanism according to claim 4, characterized in that, The retaining ring is a detachable two-piece structure. The retaining ring has several shaft holes along the height direction, and the limiting shaft passes through the shaft holes one by one. The bottom of the retaining ring is provided with a limiting protrusion. The retaining ring is movably sleeved on the adjusting column in the height direction, and the limiting protrusion is slidably installed in the strip groove.

6. The adjustable support mechanism according to claim 5, characterized in that, The lower surface of the adjustment plate is provided with mounting posts, and the mounting posts are provided with first retaining rings in the circumferential direction. There are multiple mounting posts, and reinforcing ribs are provided between adjacent mounting posts. The top of the retaining ring is provided with a second retaining ring, and the first retaining ring and the second retaining ring are fitted and fixed together.

7. The adjustable support mechanism according to claim 6, characterized in that, The adjustment plate is equipped with a robot gripper on its side.

8. The adjustable support mechanism according to claim 7, characterized in that, The upper surface of the adjusting plate is provided with a recess coaxially arranged with the mounting column, the recess has a through groove on its side, and the upper surface of the adjusting plate is provided with an assembly hole.

9. The adjustable support mechanism according to claim 8, characterized in that, A through hole is provided in the mounting column, the adjusting column passes through the through hole, and a horizontally arranged pin is inserted into the pin hole provided in the thin section, and the pin is locked in the through groove.

10. A subsea pipeline suspension support device, characterized in that, include: A support frame, comprising multiple detachably connected support modules, wherein each support module is spliced ​​together in the height direction to obtain a support frame of a preset height; A top support, detachably mounted on the top of the support frame, the top support comprising an adjustable support mechanism as described in any one of claims 1-9; The bottom support is detachably installed at the bottom of the support frame and fixed in the seabed sediment.

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