A subsea snap-fit suction anchor

Abstract

The present application relates to the technical field of seabed anchoring, and particularly relates to a seabed buckle type suction anchor, which comprises a cylinder and a sliding assembly, a cylinder cover is rotationally connected to the cylinder, the sliding assembly comprises a supporting ring and a pushing piece, a plurality of anchoring pieces are slidably arranged on the supporting ring, the pushing piece comprises a first pushing ring, a second pushing ring, a first pushing block and a first clamping piece, a driving cavity is formed between the first pushing ring and the second pushing ring, the supporting ring and the cylinder, an injection hole of an external hydraulic oil injection system is arranged on the supporting ring, the anchoring pieces increase the stability of the combination of the suction anchor and the seabed soil layer in the transverse direction, thereby improving the transverse anchoring bearing capacity, meanwhile, the first clamping piece clamps the cylinder cover and the cylinder, the connection stability of the cylinder cover and the cylinder is increased, the situation that the soil body consolidated in the cylinder is affected by scouring due to the separation of the cylinder cover from the cylinder, thereby affecting the combination stability of the suction anchor and the seabed soil layer, is reduced, and the anchoring stability of the suction anchor is further improved.

Description

Technical Field

[0001] This invention relates to the field of seabed anchoring technology, specifically to a seabed snap-on suction anchor. Background Technology

[0002] Suction anchors are commonly used basic anchoring structures in marine engineering fields such as offshore wind power, deep-sea platforms, and subsea pipelines, and are widely used in engineering anchoring operations in nearshore and deep-sea areas. A suction anchor consists of a cylinder and a cap; the bottom of the cylinder is open, and the top is closed by the cap. Suction anchors primarily rely on the principle of negative pressure penetration to install into the seabed. A suction pump draws water from inside the cylinder to create negative pressure, and the pressure difference between the inside and outside forces the cylinder into the seabed soil, achieving a fixed connection between the suction anchor and the seabed soil, providing stable tensile and compressive anchoring capacity for various marine structures.

[0003] The existing suction anchors have the following problems: (1) Since the suction anchor is a cylindrical structure, it relies only on the contact friction between the outer wall of the cylinder and the seabed soil to achieve anchoring. The anchoring force generated in the lateral direction (i.e. along the radial direction of the suction anchor) is limited, resulting in insufficient stability of the suction anchor and the seabed soil in the lateral direction. Consequently, the lateral anchoring bearing capacity is insufficient, which cannot meet the anchoring requirements of complex deep-sea working conditions.

[0004] (2) After the suction anchor is fully penetrated into the seabed soil layer, the cap is usually exposed and is easily eroded by seawater. In existing suction anchors, the cylinder and cap are usually set separately and fixed by bolts. Due to the long-term erosion by seawater, the bolt structure may fail in the connection between the cap and the cylinder. The cap is easily eroded by seawater and gaps are formed between it and the cylinder, which allows seawater to enter the cylinder and erode the consolidated soil, resulting in a decrease in the anchoring stability of the suction anchor. Summary of the Invention

[0005] The technical solution adopted by the present invention to solve its technical problem is: to provide a seabed snap-on suction anchor, including a cylinder body, a cylinder cover rotatably connected to the cylinder body, a fixing component provided on the cylinder cover, a drainage hole provided on the cylinder cover, the fixing component being used to fix the cylinder cover and the cylinder body relative to each other, and the drainage hole being used to connect an external suction pump;

[0006] It also includes a sliding assembly, which includes a support ring and a pusher. The support ring is fixedly connected to the cylinder, and multiple anchors are slidably arranged on the support ring. The anchors are provided in multiple quantities and are evenly distributed around the circumference of the cylinder.

[0007] The pushing component includes a first pushing ring, a second pushing ring, a first pushing block, and a first clamping member. The first and second pushing rings are slidably connected to the support ring. A driving cavity is formed between the first and second pushing rings, the support ring, and the cylinder. The support ring is provided with an injection hole communicating with the driving cavity. The injection hole is externally connected to a hydraulic oil injection system. When the cylinder is completely submerged in the seabed soil layer, the hydraulic oil injection system injects hydraulic oil into the injection hole, causing the first and second pushing rings to slide in opposite directions, and causing the first pushing block to push the anchor and combine with the seabed soil layer. The first clamping member clamps the cylinder cover tightly onto the cylinder.

[0008] Furthermore, the first pushing ring is provided with an outer conical surface, and the first pushing block is provided with an inner conical surface that is adapted to the outer conical surface. The first pushing block is pushed to slide radially along the cylinder by the outer conical surface and the inner conical surface.

[0009] Furthermore, each of the second push rings is provided with an inner conical surface, and the first clamping member is provided with an outer conical surface that matches the inner conical surface. The second push ring pushes the first clamping member to slide radially along the cylinder body and clamp the cylinder cover through the inner conical surface and the outer conical surface.

[0010] Furthermore, the second push ring is provided with a locking part, and the first push ring is provided with a locking groove corresponding to the locking part, and the locking part is slidably disposed in the locking groove.

[0011] Furthermore, the anchor includes a support member and an anchor rod rotatably mounted on the support member. The support member is fixed to a support ring and has a fixing part. The fixing part has a support rod and a compression spring is sleeved on the support rod. The support rod passes through the anchor rod, and both ends of the compression spring contact the anchor rod and the fixing part, respectively. A driving block corresponding to a first pushing block is slidably disposed inside the support member. The first pushing block pushes the driving block to slide, causing the anchor rod to rotate relative to the support member.

[0012] Furthermore, the support member is a cylindrical structure, and the support ring is provided with a fixing hole corresponding to the support member. The driving block includes two discs and a circular rod disposed between the two discs. One of the discs is slidably disposed in the inner hole of the support member and in contact with the anchor rod, while the other disc passes through the fixing hole and contacts the first pushing block.

[0013] Furthermore, the outer wall of the cylinder is connected to a supporting outer cylinder, and an annular cavity is provided between the supporting outer cylinder and the outer wall of the cylinder. The annular cavity is provided with multiple inlet holes, which are connected to the outside. When the cylinder is lowered under negative pressure, the soil enters the annular cavity through the inlet holes and the bottom opening of the supporting outer cylinder.

[0014] Furthermore, the cylinder body includes a first cylinder section and a second cylinder section, and a baffle is provided between the second cylinder section and the first cylinder section, and the baffle is provided with multiple through holes.

[0015] Furthermore, the inner diameter of the first cylindrical section is larger than that of the second cylindrical section, and the second cylindrical section is provided with a variable diameter section. The inner hole of the variable diameter section has a trumpet-shaped structure, and the variable diameter section is located at the connection between the second cylindrical section and the first cylindrical section.

[0016] Furthermore, the fixing assembly includes a first fixing plate, a second fixing plate, and a locking bolt. The first fixing plate is connected to the cylinder cover, and the second fixing plate is connected to the cylinder body. A rotating frame is rotatably connected to the first fixing plate, and an insertion block is movably connected to the rotating frame. The insertion block is provided with a rotating shaft. The first fixing plate is provided with a first limiting groove, and the rotating frame is provided with a second limiting groove. The rotating shaft is slidably disposed within the first limiting groove and the second limiting groove. The second fixing plate is provided with an insertion groove corresponding to the insertion block. When fixing the cylinder cover and the cylinder body, the rotating frame rotates and pushes the rotating shaft through the inner wall of the second limiting groove to drive the insertion block to slide, so that the insertion block is inserted into the insertion groove. The locking bolt is used to fix the insertion block in the insertion groove.

[0017] The beneficial effects of this invention are as follows: By using multiple anchors distributed circumferentially around the outer periphery of the cylinder, the stability of the suction anchor and the seabed soil layer in the lateral direction is increased, thereby improving the lateral anchoring bearing capacity. At the same time, the second pushing ring pushes the first clamping member to clamp the connection between the cylinder cover and the cylinder body, increasing the connection stability between the cylinder cover and the cylinder body. This makes it less likely for the cylinder cover to detach from the cylinder body due to seawater erosion when the entire suction anchor is fully penetrated into the seabed soil layer. This reduces the possibility of the solidified soil inside the cylinder being eroded due to the cylinder cover detaching from the cylinder body, affecting the stability of the connection between the suction anchor and the seabed soil layer, and further improving the anchoring stability of the suction anchor. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] In the picture: Figure 1 This invention provides an overall structural diagram of a seabed snap-on suction anchor;

[0020] Figure 2 for Figure 1 A top view of the seabed snap-on suction anchor shown;

[0021] Figure 3 for Figure 2 Sectional view along axis AA;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5for Figure 3 Enlarged view at point B in the middle;

[0024] Figure 6 for Figure 3 Enlarged view at point C;

[0025] Figure 7 for Figure 1 Exploded view of the middle section of the structure;

[0026] Figure 8 for Figure 7 A three-dimensional structural diagram of the middle section;

[0027] Figure 9 for Figure 1 Exploded view of the middle section of the structure;

[0028] Figure 10 for Figure 9 An exploded view of the anchor shown;

[0029] Figure 11 for Figure 3 A three-dimensional structural diagram of the middle section.

[0030] Explanation of reference numerals in the attached drawings: 10. Cylinder body; 11. Supporting outer cylinder; 111. Annular cavity; 112. Inlet hole; 12. First cylinder section; 13. Second cylinder section; 14. Baffle; 141. Through hole; 15. Variable diameter section; 20. Cylinder cover; 21. Drain hole; 22. Lifting ring; 30. Fixing assembly; 31. First fixing plate; 311. Rotating frame; 3111. Limiting groove two; 312. Insertion block; 313. Rotating shaft; 314. Limiting groove one; 32. Second fixing plate; 321. Insertion groove; 33. Locking bolt; 41. Support ring; 411. Injection hole; 412. Lower support frame; 4121. Sliding groove one; 413. Upper support frame; 4131. Sliding groove two; 414. Fixing... Fixed hole; 421, First push ring; 4212, Outer conical surface one; 4213, Limiting pin one; 4214, Engaging groove; 422, Second push ring; 4222, Inner conical surface two; 4223, Engaging part; 423, First push block; 4231, Inner conical surface one; 424, First clamping member; 4241, Outer conical surface two; 4242, Limiting pin two; 425, Drive cavity; 43, Anchor; 431, Support member; 4311, Fixing part; 4312, Fixing ring; 4313, Support rod; 4314, Compression spring; 4315, Drive block; 4316, Disc; 4317, Round rod; 432, Anchor rod; 4321, First contact part; 4322, Second contact part. Detailed Implementation

[0031] To make the technical problem to be solved, the technical solution, and the beneficial effects of this invention clearer, the invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic aspects of the invention, and therefore only shows the components relevant to the invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0032] Please refer to Figure 1 and Figure 2 This invention provides a seabed snap-on suction anchor, comprising a cylindrical body 10 and a sliding assembly. A cylindrical cover 20 is rotatably connected to the cylindrical body 10. The cylindrical cover 20 is provided with a fixing assembly 30 and a drainage hole 21. The fixing assembly 30 is used to fix the cylindrical cover 20 and the cylindrical body 10 relative to each other, and the drainage hole 21 is used to connect an external suction pump. Specifically, the cylindrical cover 20 is also provided with multiple lifting rings 22 for hoisting.

[0033] Please refer to Figure 3 , Figure 6 , Figure 7 and Figure 8 The fixing assembly 30 includes a first fixing plate 31, a second fixing plate 32, and a locking bolt 33. The first fixing plate 31 is connected to the cylinder cover 20, and the second fixing plate 32 is connected to the cylinder body 10. A rotating frame 311 is rotatably connected to the first fixing plate 31, and a plug-in block 312 is movably connected to the rotating frame 311. A rotating shaft 313 is provided on the plug-in block 312. A limiting groove 314 is provided on the first fixing plate 31, and a limiting groove 3111 is provided on the rotating frame 311. Shaft 313 is slidably disposed in limiting groove 1 314 and limiting groove 2 3111. The second fixing plate 32 is provided with a plug groove 321 corresponding to the plug block 312. When fixing the cylinder cover 20 and the cylinder body 10, the rotating frame 311 rotates and pushes the rotating shaft 313 through the inner wall of limiting groove 2 3111 to drive the plug block 312 to slide, so that the plug block 312 is inserted into the plug groove 321. The locking bolt 33 is used to fix the plug block 312 in the plug groove 321.

[0034] For details, please refer to Figure 6 and Figure 8 With the diameter direction of the cylinder cover 20 as the horizontal direction, the first limiting groove 314 is set in the horizontal direction, and the second limiting groove 3111 is set at an angle. The first fixing plate 31 is a U-shaped plate, and there are two limiting grooves 314 on the first fixing plate 31. The two ends of the rotating shaft 313 pass through the two limiting grooves 314 respectively. Both ends of the rotating shaft 313 are provided with nuts (not labeled in the figure) to limit the rotating shaft 313 in the axial direction, so that the rotating shaft 313 cannot be separated from the first fixing plate 31 in the axial direction of the rotating shaft 313.

[0035] Please refer to Figure 2 , Figure 3 and Figure 9 The sliding assembly includes a support ring 41 and a pusher. The support ring 41 is fixedly connected to the cylinder 10. Multiple anchors 43 are slidably arranged on the support ring 41. The pusher includes a first pusher ring 421, a second pusher ring 422, a first pusher block 423, and a first clamping member 424. The first pusher ring 421 and the second pusher ring 422 are both slidably connected to the inner wall of the support ring 41, and the first pusher ring 421 and the second pusher ring 422 are both sealed relative to the inner wall of the support ring 41. A driving cavity 425 is formed between the first pushing ring 421, the second pushing ring 422, the support ring 41, and the cylinder 10. The support ring 41 is provided with an injection hole 411 that communicates with the driving cavity 425. The injection hole 411 is connected to a hydraulic oil injection system (not shown in the figure). When the cylinder 10 is completely submerged in the seabed soil, the hydraulic oil injection system injects hydraulic oil into the injection hole 411, causing the first pushing ring 421 and the second pushing ring 422 to slide in opposite directions, and causing the first pushing block 423 to push the anchor 43 to engage with the seabed soil. The first clamping member 424 clamps the cylinder cover 20 onto the cylinder 10.

[0036] When the suction anchor is buried in the seabed soil, hydraulic oil is injected into the injection hole 411 through the external hydraulic oil injection system, so that the first push ring 421 and the second push ring 422 slide in opposite directions along the axial direction of the cylinder 10, and the first push block 423 pushes the anchor 43 to combine with the seabed soil, and the first clamping member 424 clamps the cylinder cover 20 onto the cylinder 10.

[0037] Multiple anchors 43 distributed circumferentially around the outer periphery of the cylinder 10 increase the stability of the suction anchor's connection with the seabed soil in the lateral direction, thereby improving the lateral anchoring bearing capacity. At the same time, the second pushing ring 422 pushes the first clamping member 424 to clamp the connection between the cylinder cover 20 and the cylinder 10, increasing the connection stability between the cylinder cover 20 and the cylinder 10. This makes it less likely for the cylinder cover 20 to detach from the cylinder 10 due to seawater erosion when the entire suction anchor is fully penetrated into the seabed soil. This reduces the possibility of the solidified soil inside the cylinder 10 being eroded due to the cylinder cover 20 detaching from the cylinder 10, thus affecting the stability of the connection between the suction anchor and the seabed soil and further improving the anchoring stability of the suction anchor.

[0038] For details, please refer to Figure 4 and Figure 5The first pushing ring 421 has an outer conical surface 4212, and the first pushing block 423 has an inner conical surface 4231 that matches the outer conical surface 4212. The first pushing ring 421 pushes the first pushing block 423 to slide radially along the cylinder 10 through the outer conical surface 4212 and the inner conical surface 4231. The second pushing ring 422 has an inner conical surface 4222, and the first clamping member 424 has an outer conical surface 4241 that matches the inner conical surface 4222. The second pushing ring 422 pushes the first clamping member 424 to slide radially along the cylinder 10 and clamp the cylinder cover 20 through the inner conical surface 4222 and the outer conical surface 4241.

[0039] Please refer to Figure 1 and Figure 3 The outer wall of the cylinder 10 is connected to a supporting outer cylinder 11. An annular cavity 111 is provided between the supporting outer cylinder 11 and the outer wall of the cylinder 10. The annular cavity 111 has multiple inlet holes 112, which communicate with the outside. When the cylinder 10 descends under negative pressure, soil enters the annular cavity 111 through the inlet holes 112 and the bottom opening of the supporting outer cylinder 11. By setting up the supporting outer cylinder 11, when the cylinder 10 descends under negative pressure, some of the soil around the cylinder 10 will enter the annular cavity 111 through the inlet holes 112 and the bottom of the supporting outer cylinder 11 under the soil layer recovery effect, and eventually fill the entire annular cavity 111. The setting up of the supporting outer cylinder 11 increases the contact area between the entire suction anchor and the seabed soil layer in the lateral direction, thereby increasing the connection stability between the cylinder 10 and the seabed soil layer in the lateral direction.

[0040] Specifically, in this embodiment, the outer support cylinder 11 and the cylinder body 10 are concentrically arranged and connected by welding. The outer support cylinder 11 is closer to the seabed soil layer than the support ring 41. The outer support cylinder 11 is made of thick steel plate. The arrangement of the outer support cylinder 11 can increase the self-weight of the entire suction anchor, thereby ensuring the initial penetration depth of the suction anchor into the seabed soil layer by its own weight, and thus improving the bearing capacity and pull-out resistance of the entire suction anchor.

[0041] Please refer to Figure 4 , Figure 5 , Figure 9 and Figure 11The support ring 41 is connected to a lower support frame 412. The upper support frame 413 has a sliding groove 4121 corresponding to the first pushing block 423. The first pushing block 423 has a limiting pin 4213 corresponding to the sliding groove 4121. The limiting pin 4213 is slidably disposed within the corresponding sliding groove 4121. The support ring 41 also has an upper support frame 413, which has a sliding groove 4131 corresponding to the first clamping member 424. The first clamping member 424 has a limiting pin 4242 corresponding to the sliding groove 4131. The limiting pin 4242 is slidably disposed within the corresponding sliding groove 4131. The limiting pins 4213 and 4242 respectively limit the first pushing block 423 and the first clamping member 424 in a circumferential direction, making it difficult for the first pushing block 423 and the first clamping member 424 to shift in the circumferential direction.

[0042] Please refer to Figure 4 and Figure 9 The second push ring 422 is provided with a locking part 4223, and the first push ring 421 is provided with a locking groove 4214 corresponding to the locking part 4223. The locking part 4223 is slidably disposed in the locking groove 4214. Through the cooperation of the locking part 4223 and the locking groove 4214, the first push ring 421 and the second push ring 422 are relatively positioned when they slide relative to each other.

[0043] Please refer to Figure 4 , Figure 9 and Figure 10 Multiple anchors 43 are provided, and the anchors 43 are evenly distributed circumferentially along the periphery of the cylinder 10. The anchor 43 includes a support member 431 and an anchor rod 432 rotatably mounted on the support member 431. The support member 431 is fixed to the support ring 41. The support member 431 is provided with a fixing part 4311. The fixing part 4311 is provided with a support rod 4313. A compression spring 4314 is sleeved on the support rod 4313. The support rod 4313 passes through the anchor rod 432, and the two ends of the compression spring 4314 are in contact with the anchor rod 432 and the fixing part 4311, respectively. A driving block 4315 corresponding to the first pushing block 423 is slidably arranged inside the support member 431. The first pushing block 423 pushes the driving block 4315 to slide, so that the anchor rod 432 rotates relative to the support member 431.

[0044] Specifically, in this embodiment, please refer to Figure 4 and Figure 10Each anchor 43 includes two opposing anchor rods 432. Each anchor rod 432 has a circular hole (not labeled in the figure) through which a support rod 4313 passes. The diameter of this hole is larger than the diameter of the support rod 4313, allowing the support rod 4313 to swing within the hole. The ends of the anchor rods 432 include a first contact portion 4321 and a second contact portion 4322, which form an L-shaped plate structure. The first contact portion 4321 is closer to the central axis of the cylinder 10 than the second contact portion 4322. Initially, the first contact portion 4321 is positioned radially along the cylinder 10, and the second contact portion 4322 is positioned axially along the cylinder 10. When the first pushing block 423 pushes the driving block 4315 to slide, causing the anchor rod 432 to rotate relative to the support member 431, the ends of the two anchor rods 432 rotate in opposite directions, and finally the entire anchor 43 is in an open state. The first contact part 4321 and the second contact part 4322 are both inclined relative to the axial direction of the cylinder 10, which increases the contact area between the entire suction anchor and the seabed soil in the radial direction.

[0045] Please refer to Figure 4 and Figure 10 The support member 431 has a cylindrical structure, and a fixing ring 4312 is integrally formed on the side wall of the support member 431. The support ring 41 has a fixing hole 414 corresponding to the support member 431, and the fixing hole 414 connects the inner wall of the support ring 41 and the outside. The cross-section of the fixing hole 414 along the diameter direction of the support ring 41 is a T-shaped hole structure, and the fixing ring 4312 is fixed in the end of the fixing hole 414 with the larger diameter along the radial direction of the support ring 411. The drive block 4315 has an I-shaped cross-section and includes two disks 4316 and a circular rod 4317 disposed between the two disks 4316. One disk 4316 is slidably disposed in the inner hole of the support member 431 and contacts the anchor rod 432, and the other disk 4316 passes through the fixing hole 414 and contacts the first push block 423.

[0046] Please refer to Figure 3 and Figure 7 The cylinder 10 includes a first section 12 and a second section 13. The second section 13 is closer to the seabed soil layer than the first section 12. A baffle 14 is provided between the second section 13 and the first section 12, and the baffle 14 has multiple through holes 141. The baffle 14 reduces the problem of soil heave caused by the soil plugging effect, which could lead to premature contact with the cylinder cover 20 and prevent the suction anchor from continuing to descend, thus affecting the sinking efficiency. When the soil enters the first section 12 along the second section 13, the baffle 14 blocks the soil, slowing down the soil heave and thus reducing the impact of the soil plugging effect on the sinking process of the suction anchor.

[0047] Please refer to Figure 3The inner diameter of the first cylindrical section 12 is larger than the inner diameter of the second cylindrical section 13. The second cylindrical section 13 is provided with a variable diameter section 15. The inner hole of the variable diameter section 15 has a trumpet-shaped structure. The variable diameter section 15 is located at the connection between the second cylindrical section 13 and the first cylindrical section 12.

[0048] By setting the variable diameter section 15, the entire suction anchor descends under negative pressure, causing a soil plugging effect in the seabed soil layer, resulting in soil heave and premature contact with the cylinder cover 20, which prevents the suction anchor from descending further and affects the sinking efficiency. However, due to the presence of the variable diameter section 15, the cross-sectional area of ​​the soil increases when it enters the first cylinder section 12 along the second cylinder section 13, and the soil heave is slowed down, thereby further reducing the impact of the soil plugging effect on the sinking process of the suction anchor.

Claims

1. A seabed snap-on suction anchor, comprising a cylindrical body (10), a cylindrical cover (20) rotatably connected to the cylindrical body (10), the cylindrical cover (20) having a fixing component (30), a drain hole (21) on the cylindrical cover (20), the fixing component (30) for fixing the cylindrical cover (20) and the cylindrical body (10) relative to each other, and the drain hole (21) for connecting an external suction pump; characterized in that: It also includes a sliding component, which includes a support ring (41) and a pusher. The support ring (41) is fixedly connected to the cylinder (10). Multiple anchors (43) are slidably arranged on the support ring (41). Multiple anchors (43) are provided, and the anchors (43) are evenly distributed along the circumferential direction of the cylinder (10). The pushing component includes a first pushing ring (421), a second pushing ring (422), a first pushing block (423), and a first clamping member (424). The first pushing ring (421) and the second pushing ring (422) are both slidably connected to the support ring (41). A driving cavity (425) is formed between the first pushing ring (421), the second pushing ring (422), the support ring (41), and the cylinder (10). The support ring (41) is provided with a connection to the driving cavity (425). The injection hole (411) is connected to a hydraulic oil injection system. When the cylinder (10) is completely submerged in the seabed soil, the hydraulic oil injection system injects hydraulic oil into the injection hole (411), causing the first push ring (421) and the second push ring (422) to slide in opposite directions, and causing the first push block (423) to push the anchor (43) to combine with the seabed soil, and the first clamping member (424) to clamp the cylinder cover (20) onto the cylinder (10); The first pushing ring (421) is provided with an outer conical surface (4212), and the first pushing block (423) is provided with an inner conical surface (4231) that is adapted to the outer conical surface (4212). The first pushing block (423) is pushed to slide radially along the cylinder (10) by the outer conical surface (4212) and the inner conical surface (4231). The second push ring (422) is provided with an inner conical surface (4222), and the first clamping member (424) is provided with an outer conical surface (4241) that is adapted to the inner conical surface (4222). The second push ring (422) pushes the first clamping member (424) to slide along the radial direction of the cylinder (10) and clamp the cylinder cover (20) through the inner conical surface (4222) and the outer conical surface (4241). The anchor (43) includes a support member (431) and an anchor rod (432) rotatably mounted on the support member (431). The support member (431) is fixed on a support ring (41). The support member (431) is provided with a fixing part (4311). The fixing part (4311) is provided with a support rod (4313). A compression spring (4314) is sleeved on the support rod (4313). The support rod (4313) passes through the anchor rod (432), and the two ends of the compression spring (4314) are in contact with the anchor rod (432) and the fixing part (4311) respectively. A driving block (4315) corresponding to the first pushing block (423) is slidably arranged inside the support member (431). The first pushing block (423) pushes the driving block (4315) to slide, so that the anchor rod (432) rotates relative to the support member (431).

2. The seabed snap-on suction anchor according to claim 1, characterized in that: The second push ring (422) is provided with a locking part (4223), and the first push ring (421) is provided with a locking groove (4214) corresponding to the locking part (4223). The locking part (4223) is slidably disposed in the locking groove (4214).

3. The seabed snap-on suction anchor according to claim 1, characterized in that: The support member (431) is a cylindrical structure. The support ring (41) is provided with a fixing hole (414) corresponding to the support member (431). The driving block (4315) includes two discs (4316) and a round rod (4317) disposed between the two discs (4316). One of the discs (4316) is slidably disposed in the inner hole of the support member (431) and contacts the anchor rod (432). The other disc (4316) passes through the fixing hole (414) and contacts the first pushing block (423).

4. The seabed snap-on suction anchor according to claim 1, characterized in that: The outer wall of the cylinder (10) is connected to a supporting outer cylinder (11). An annular cavity (111) is provided between the supporting outer cylinder (11) and the outer wall of the cylinder (10). The annular cavity (111) is provided with multiple inlet holes (112). The inlet holes (112) are connected to the outside. When the cylinder (10) is lowered by negative pressure, the soil enters the annular cavity (111) along the inlet holes (112) and the bottom opening of the supporting outer cylinder (11).

5. The seabed snap-on suction anchor according to claim 1, characterized in that: The cylinder (10) includes a first cylinder section (12) and a second cylinder section (13), and a baffle (14) is provided between the second cylinder section (13) and the first cylinder section (12), and the baffle (14) is provided with a plurality of through holes (141).

6. The seabed snap-on suction anchor according to claim 5, characterized in that: The inner diameter of the first cylindrical section (12) is larger than the inner diameter of the second cylindrical section (13). The second cylindrical section (13) is provided with a variable diameter section (15). The inner hole of the variable diameter section (15) is in the shape of a trumpet. The variable diameter section (15) is located at the connection between the second cylindrical section (13) and the first cylindrical section (12).

7. The seabed snap-on suction anchor according to claim 1, characterized in that: The fixing assembly (30) includes a first fixing plate (31), a second fixing plate (32), and a locking bolt (33). The first fixing plate (31) is connected to the cylinder cover (20), and the second fixing plate (32) is connected to the cylinder body (10). A rotating frame (311) is rotatably connected to the first fixing plate (31), and a plug-in block (312) is movably connected to the rotating frame (311). A rotating shaft (313) is provided on the plug-in block (312). A limiting groove one (314) is provided on the first fixing plate (31), and a limiting groove two (3111) is provided on the rotating frame (311). The rotating shaft (313) is slidably disposed in the first limiting groove (314) and the second limiting groove (3111). The second fixing plate (32) is provided with a corresponding insertion groove (321) for the insertion block (312). When fixing the cylinder cover (20) and the cylinder body (10), the rotating frame (311) rotates and pushes the rotating shaft (313) through the inner wall of the second limiting groove (3111) to drive the insertion block (312) to slide, so that the insertion block (312) is inserted into the insertion groove (321). The locking bolt (33) is used to fix the insertion block (312) in the insertion groove (321).

Images