Anti-scouring device for offshore wind power foundation

Abstract

The invention provides an offshore wind power foundation anti-scour device which comprises a pile foundation, a conical base is fixedly connected to the position, close to the bottom, of the pile foundation, four sets of supports are fixedly connected to the bottom of the conical base, the ends, away from the conical base, of the supports are each of an arc design, and a connecting ring is installed above the conical base. The connecting ring is rotationally connected to the outer end of the pile foundation, and a protective shell is installed at one end above the connecting ring. Dual protection is formed by combining rotation kinetic energy conversion and a mechanical buffering mechanism, the arc-shaped blades rotate to drive the protective sleeve to be in linkage, the arc-shaped protruding blocks periodically extrude the spherical bodies, and impact energy is absorbed through the buffering springs; the spring assembly adopts corrosion-resistant alloy and sealing lubrication design, buffering reliability is ensured, water flow impact is converted into controllable mechanical energy consumption through the structure, the structure and blade flow guide are in synergistic effect, direct scouring force is weakened, stress concentration is avoided, the overall anti-scouring stability of the pile foundation is remarkably improved, and the service life of the pile foundation is remarkably prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore equipment, and in particular to an offshore wind power foundation anti-scour device. Background Art

[0002] Offshore wind turbine pile foundations are crucial for supporting the entire offshore wind turbine, accounting for approximately 14% of the total offshore wind turbine installation cost. However, accidents involving offshore wind turbines are often caused by unstable pile foundations. Due to the action of waves and tidal currents, the sediment surrounding the offshore wind turbine pile foundations will be washed away, forming scour pits, which will affect the stability of the pile foundations. Furthermore, the flow of water mixed with sediment near the seabed surface constantly scours the pile foundations, corroding and damaging the pile foundation surface. In severe cases, this can cause the offshore wind turbine unit to collapse.

[0003] Existing offshore wind power pile foundation anti-scour technology generally relies on fixed protective structures (such as riprap, pads or rigid skirts). Its passive protection method is difficult to actively guide and disperse high-speed water flow, resulting in increased local scour around the piles. Repair of fixed structures after damage is extremely difficult, usually requiring large-scale water construction and diving operations, which are costly and risky. At the same time, there is a general lack of effective dynamic buffering mechanisms, and long-term impact by water flow can easily cause structural fatigue damage. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the shortcomings of the existing technology, the present invention provides an offshore wind power foundation anti-scour device, which solves the problem that the existing offshore wind power pile foundation anti-scour technology generally relies on fixed protection structures, and its passive protection method is difficult to actively guide and disperse high-speed water flow, resulting in aggravated local scour around the piles.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an offshore wind power foundation anti-scour device, including a pile foundation, wherein a conical base is fixedly connected near the bottom of the pile foundation, and a bracket is fixedly connected to the bottom of the conical base. The bracket is provided in four groups, and the ends of the brackets away from the conical base are all arc-shaped. A connecting ring is installed above the conical base, and the connecting ring is rotatably connected to the outer end of the pile foundation. A protective shell is installed at the upper end of the connecting ring;

[0008] The outer end of the connecting ring is provided with a plurality of limiting grooves, and a mounting piece is correspondingly installed on the outer end of the connecting ring. The outer end of the mounting piece is fixedly connected to a plurality of arc-shaped guide blades of the same size and shape, and the inner end of the mounting piece is fixedly connected to a plurality of limiting blocks, and the limiting blocks cooperate with the limiting grooves. One end of the inner part of the connecting ring is rotatably connected to a rotating shaft, and the top of the rotating shaft is arranged inside the protective shell. The rotating shaft located at the inner end of the connecting ring is fixedly connected to the main gear;

[0009] The interior of the connecting ring is rotatably connected to the slave gear 1, and the slave gear 1 is meshed with the main gear. The outer end of the slave gear 1 is also equipped with a number of slave gears 2. The inner top of the connecting ring is fixedly connected to a number of connecting shells. The interior of the slave gear 2 is fixedly connected to a connecting shaft, and the top of the connecting shaft passes through the connecting shell and is fixedly connected to the bevel gear 1 inward.

[0010] Preferably, a bidirectional screw is connected to the interior of the connecting shell for transverse rotation, and the bidirectional screw is located at the inner end portion of the connecting shell and is fixedly connected to a second bevel gear, and the first bevel gear and the second bevel gear cooperate with each other.

[0011] Preferably, the two-way screw is threaded with two positioning plates, and the positioning plates are slidably connected to the inside of the limiting groove.

[0012] Preferably, a positioning groove is provided at the inner end of the limiting block, and the positioning groove corresponds to the positioning plate.

[0013] Preferably, the inner end of the connecting ring is fixedly connected to several groups of connecting blocks, the bidirectional screw is rotatably connected to the inner upper end of the connecting block, the inner bottom of the connecting block is fixedly connected to a sliding rod, and the positioning plate is slidably connected to the sliding rod.

[0014] Preferably, the inner end of the bracket is threadedly connected to a fixing ring, the inner end of the fixing ring is fixedly connected to a mounting ring, and there is a certain distance between the fixing ring and the mounting ring.

[0015] Preferably, the inner end of the fixed ring is fixedly connected to several pillars, an inner groove is opened inside the pillar, the inner end of the inner groove is fixedly connected to a buffer spring, the other end of the buffer spring is fixedly connected to a limiting plate, and the other end of the limiting plate is fixedly connected to a movable column.

[0016] Preferably, the other end of the movable column passes through the pillar and the mounting ring and is fixedly connected inwardly with a spherical body, the inner upper end of the connecting ring is fixedly connected with a sleeve, the outer end of the sleeve is fixedly connected with an arc-shaped protrusion, and the arc-shaped protrusion corresponds to the spherical body.

[0017] Working principle: When in use, the pile foundation 1 and the conical base 4 are installed on the seabed. During daily use, seawater will impact the entire device, and the impact of seawater can drive the arc-shaped guide blades 6 to rotate. The rotation of multiple arc-shaped guide blades 6 can guide the water flow, effectively avoiding direct impact of the water flow, dispersing the water flow near the pile foundation 1, and reducing its scouring force. Moreover, as the arc-shaped guide blades 6 rotate, the connecting ring 5 and the top sheath 12 can be driven to rotate, and the arc-shaped protrusion 11 at the outer end of the sheath 12 can contact the spherical body 10 at the outer end during the rotation process. Under the contact and extrusion action of the rotating protrusion 11, the spherical body 10 can drive the movable column 26 and the limit plate 24 to move toward the direction of the inner groove 27, so that the limit plate 24 squeezes the buffer spring 25. Under the action of the buffer spring 25, its buffering effect can be achieved, and combined with the guide assembly below, the multiple anti-scouring effects of the entire device can be achieved.

[0018] After long-term use, when the arc guide blade 6 needs to be replaced, first, the entire fixing ring 2 is removed from the outer end of the pile foundation 1, then the protective shell 16 is opened, and the internal rotating shaft 22 is rotated to drive the main gear 23 to rotate, and the slave gear 1 17 can be driven to rotate under the meshing action. Similarly, under the meshing action, multiple slave gears 2 21 on the periphery can be driven to rotate, and the rotational force of the slave gear 2 21 is transmitted to the bevel gear 2 30 through the bevel gear 1 28, so that the bidirectional screw 19 is rotated. Finally, under the action of the threaded connection, the two positioning plates 20 can move relative to each other and gradually contact. At this time, the limit block 14 is no longer subject to the limiting force, and the mounting part 13 can be directly removed from the outside of the connecting ring 5, so that the staff can conveniently disassemble and replace the arc guide blade 6 and improve the use effect of the entire anti-scouring device.

[0019] (3) Beneficial effects

[0020] The present invention provides an anti-scour device for offshore wind power foundations. It has the following beneficial effects:

[0021] 1. The present invention combines the conversion of rotational kinetic energy with a mechanical buffering mechanism to form a double protection. The rotation of the arc-shaped blade drives the sheath in linkage, and its arc-shaped protrusion periodically squeezes the spherical body, absorbing the impact energy through the buffer spring; the spring component adopts a corrosion-resistant alloy and a sealed and lubricated design to ensure buffering reliability. This structure converts water flow impact into controllable mechanical energy consumption, and works synergistically with the blade diversion to weaken direct scouring force and avoid stress concentration, significantly improving the overall anti-scouring stability and life of the pile foundation.

[0022] 2. This invention actively guides water flow through rotatable curved guide vanes, effectively dispersing scouring forces around the pile foundation. The mechanical linkage between the stop block and the positioning slot, coupled with a bidirectional screw drive, enables rapid assembly and disassembly of the blades. This design significantly simplifies offshore replacement, avoiding the complex processes of traditional welding or integral hoisting. It ensures that the blades maintain efficient flow guidance under long-term seawater impact, while significantly reducing maintenance costs and downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an offshore wind power foundation anti-scour device proposed by the present invention;

[0024] Figure 2 This is a top view of an offshore wind power foundation anti-scour device proposed by the present invention;

[0025] Figure 3 This is a schematic diagram of the mounting structure of an offshore wind power foundation anti-scour device proposed by the present invention;

[0026] Figure 4 This is a schematic diagram of the interior of a connection ring of an offshore wind power foundation anti-scour device proposed by the present invention;

[0027] Figure 5 This is a schematic diagram of a buffer mechanism of an offshore wind power foundation anti-scour device proposed by the present invention;

[0028] Figure 6 This is a schematic diagram of the internal structure of the connection shell of an offshore wind power foundation anti-scour device proposed by the present invention.

[0029] Among them, 1. Pile foundation; 2. Fixing ring; 3. Bracket; 4. Conical base; 5. Connecting ring; 6. Arc-shaped guide blade; 7. Mounting ring; 8. Positioning groove; 9. Pillar; 10. Spherical body; 11. Arc-shaped protrusion; 12. Sheath; 13. Mounting piece; 14. Limit block; 15. Limiting groove; 16. Protective shell; 17. Slave gear 1; 18. Connecting shell; 19. Bidirectional screw; 20. Positioning plate; 21. Slave gear 2; 22. Rotating shaft; 23. Main gear; 24. Limiting plate; 25. Buffer spring; 26. Movable column; 27. Inner groove; 28. Bevel gear 1; 29. ​​Connecting shaft; 30. Bevel gear 2. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example:

[0032] like Figure 1-6 As shown, an embodiment of the present invention provides an offshore wind power foundation anti-scour device, including a pile foundation 1, a conical base 4 is fixedly connected to the pile foundation 1 near the bottom position, a bracket 3 is fixedly connected to the bottom of the conical base 4, four groups of brackets 3 are provided, and the ends of the brackets 3 away from the conical base 4 are all arc-shaped, a connecting ring 5 is installed above the conical base 4, the connecting ring 5 is rotatably connected to the outer end of the pile foundation 1, and a protective shell 16 is installed at the upper end of the connecting ring 5. By providing the conical base 4, the contact area between the entire pile foundation 1 and the seabed plane can be increased, thereby improving the stability of the entire pile foundation 1 when in use. Secondly, the arc-shaped design of the outer end of the bracket 3 can reduce the impact of water flow, thereby improving the stability of the connection between the bracket 3 and the fixing ring 2, and the bracket 3 and the fixing ring 2 are locked with bolts to ensure the stability of both.

[0033] The outer end of the connecting ring 5 is provided with a plurality of limiting grooves 15, and the outer end of the connecting ring 5 is correspondingly installed with a mounting piece 13. The outer end of the mounting piece 13 is fixedly connected with a plurality of arc-shaped guide blades 6 of the same size and shape, and the inner end of the mounting piece 13 is fixedly connected with a plurality of limiting blocks 14. The limiting blocks 14 cooperate with the limiting grooves 15. One end of the interior of the connecting ring 5 is rotatably connected with a rotating shaft 22. The top of the rotating shaft 22 is arranged inside the protective shell 16. The rotating shaft 22 is located at the inner end of the connecting ring 5 and is fixedly connected with a main gear 23. The protective shell 16 can be installed on the top of the connecting ring 5 in a variety of ways. The purpose of providing the protective shell 16 is to protect the internal rotating shaft 22 to prevent the rotating shaft 22 from being impacted by seawater and causing self-rotation and damage.

[0034] The inner rotation of the connecting ring 5 is connected to the slave gear 17, which meshes with the main gear 23. The outer end of the slave gear 17 is also equipped with a number of slave gears 21. The inner top of the connecting ring 5 is fixedly connected to a number of connecting shells 18. The inner part of the slave gear 21 is fixedly connected to a connecting shaft 29. The top of the connecting shaft 29 passes through the connecting shell 18 and is fixedly connected to the bevel gear 1 28 inwardly. The inner part of the connecting shell 18 is connected to a bidirectional screw 19 for horizontal rotation. The bidirectional screw 19 is located at the inner end of the connecting shell 18 and is fixedly connected to the bevel gear 2 30. The bevel gear 1 28 and the bevel gear 2 30 cooperate with each other. There are two positioning plates 20 on the threaded part of the bidirectional screw 19, and the positioning plate 20 is slidably connected to the inside of the limit groove 15. The inner end of the limit block 14 is provided with a positioning groove 8, which corresponds to the positioning groove 8. After long-term use, when the arc-shaped guide blade 6 needs to be replaced, first, the entire fixing ring 2 is taken out from the outer end of the pile foundation 1, then the protective shell 16 is opened, and the internal rotating shaft 22 is rotated to drive the main gear 23 to rotate, which can drive the slave gear 1 17 to rotate under the meshing action. Similarly, under the meshing action, multiple slave gears 21 on the periphery can be driven to rotate, and the rotational force of the slave gear 21 is transmitted to the bevel gear 2 30 through the bevel gear 1 28, so that the bidirectional screw 19 is rotated. Finally, under the action of the threaded connection, the two positioning plates 20 can be made to move relative to each other and gradually contact. At this time, the limit block 14 is no longer subject to the limiting force, and the mounting part 13 can be directly taken out from the outside of the connecting ring 5, so that the staff can conveniently disassemble and replace the arc-shaped guide blade 6, thereby improving the use effect of the entire anti-scouring device;

[0035] The inner end of the connecting ring 5 is fixedly connected with several groups of connecting blocks, the bidirectional screw 19 is rotatably connected to the inner upper end of the connecting block, the inner bottom of the connecting block is fixedly connected with a slide rod, and the positioning plate 20 is slidably connected to the slide rod. By arranging the slide rod and the connecting block, the bidirectional screw 19 and the positioning plate 20 can be restricted to ensure the stability of the positioning block 20 when sliding. Secondly, a slide groove connected to the positioning plate 20 is opened inside the limiting groove 15 to ensure that the positioning plate 20 slides a certain distance inside the limiting groove 15 and is fixed to the positioning groove 8 inside the limiting block 14, thereby improving the stability of the arc guide blade 6 when in use;

[0036] The inner end of the bracket 3 is threadedly connected to a fixing ring 2, and the inner end of the fixing ring 2 is fixedly connected to a mounting ring 7, and there is a certain distance between the fixing ring 2 and the mounting ring 7. The inner end of the fixing ring 2 is fixedly connected to a number of pillars 9, and an inner groove 27 is provided inside the pillar 9. The inner end of the inner groove 27 is fixedly connected to a buffer spring 25, and the other end of the buffer spring 25 is fixedly connected to a limit plate 24. The other end of the limit plate 24 is fixedly connected to a movable column 26. The other end of the movable column 26 passes through the pillar 9 and the mounting ring 7 and is fixedly connected to a spherical body 10 inwardly. The inner upper end of the connecting ring 5 is fixed The outer end of the sheath 12 is fixedly connected to the sheath 12, and the arc-shaped protrusion 11 is fixedly connected to the spherical body 10. The arc-shaped protrusion 11 corresponds to the spherical body 10, and the arc-shaped guide blade 6 can be driven to rotate along the impact of the sea water. The rotation of the plurality of arc-shaped guide blades 6 can guide the water flow, effectively avoid the direct impact of the water flow, disperse the water flow near the pile foundation 1, and reduce its scouring force. Moreover, as the arc-shaped guide blade 6 rotates, the connecting ring 5 and the top sheath 12 can be driven to rotate, and the arc-shaped protrusion 11 at the outer end of the sheath 12 can rotate with the arc-shaped guide blade 6 during the rotation process. The spherical body 10 at the outer end is in contact, and the spherical body 10 can drive the movable column 26 and the limit plate 24 to move toward the inner groove 27 under the contact and extrusion action of the rotating protrusion 11, so that the limit plate 24 squeezes the buffer spring 25. Under the action of the buffer spring 25, its buffering effect can be achieved. In conjunction with the guide component below, the multiple anti-scouring effects of the entire device can be achieved. All metal components immersed in seawater of the present invention are made of high-grade seawater corrosion-resistant materials (such as duplex stainless steel, nickel-aluminum bronze or high-performance anti-corrosion coated steel), and are applied with long-term anti-fouling and anti-corrosion coatings. Corrosion coating (such as environmentally friendly self-polishing antifouling paint or silicon-based antifouling coating), coating requirements for key water contact parts such as the arc guide blade 6, the outer surface of the connecting ring 5, and the outer surface of the sheath 12. The buffer spring 25 adopts alloy spring steel wire with high fatigue strength and seawater corrosion resistance. The inner groove 27 is filled with seawater-resistant grease. The guide holes of the movable column 26 and the support 9 need to be designed to be precisely matched, and wear-resistant bushings are set. Dynamic seals are added at the guide holes to prevent seawater from intruding into the inner groove 27. The contact surface of the spherical body 10 and the arc-shaped protrusion 11 is surface hardened to improve wear resistance.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An offshore wind power foundation anti-scour device, comprising a pile foundation (1), characterized in that: The pile foundation (1) is fixedly connected to a conical base (4) near the bottom, and the bottom of the conical base (4) is fixedly connected to a bracket (3), and the bracket (3) is provided with four groups, and the ends of the brackets (3) away from the conical base (4) are all designed in an arc shape, and a connecting ring (5) is installed above the conical base (4), and the connecting ring (5) is rotatably connected to the outer end of the pile foundation (1), and a protective shell (16) is installed at the upper end of the connecting ring (5); The outer end of the connecting ring (5) is provided with a plurality of limiting grooves (15), and the outer end of the connecting ring (5) is correspondingly installed with a mounting member (13), and the outer end of the mounting member (13) is fixedly connected with a plurality of arc-shaped guide blades (6) of the same size and shape, and the inner end of the mounting member (13) is fixedly connected with a plurality of limiting blocks (14), and the limiting blocks (14) and the limiting grooves (15) cooperate with each other. One end of the inner part of the connecting ring (5) is rotatably connected with a rotating shaft (22), and the top of the rotating shaft (22) is arranged inside the protective shell (16), and the rotating shaft (22) is located at the inner end of the connecting ring (5) and is fixedly connected with a main gear (23); The interior of the connecting ring (5) is rotatably connected to a slave gear 1 (17), and the slave gear 1 (17) is meshed with the main gear (23). The outer end of the slave gear 1 (17) is also matched with a plurality of slave gears 2 (21). The top of the inner side of the connecting ring (5) is fixedly connected to a plurality of connecting shells (18). The interior of the slave gear 2 (21) is fixedly connected to a connecting shaft (29). The top of the connecting shaft (29) passes through the connecting shell (18) and is fixedly connected inwardly to a bevel gear 1 (28).

2. The offshore wind power foundation anti-scour device according to claim 1, characterized in that: The interior of the connecting shell (18) is laterally rotatably connected to a bidirectional screw (19), and the bidirectional screw (19) is located at the inner end portion of the connecting shell (18) and is fixedly connected to a second bevel gear (30), and the first bevel gear (28) and the second bevel gear (30) cooperate with each other.

3. The offshore wind power foundation anti-scour device according to claim 2, characterized in that: The bidirectional screw (19) is threadedly engaged with two positioning plates (20), and the positioning plates (20) are slidably connected to the interior of the limiting groove (15).

4. The offshore wind power foundation anti-scour device according to claim 3, characterized in that: A positioning groove (8) is provided at the inner end of the limiting block (14), and the positioning groove (8) corresponds to the positioning plate (20).

5. The offshore wind power foundation anti-scour device according to claim 1, characterized in that: The inner end of the connecting ring (5) is fixedly connected to a plurality of connecting blocks, the bidirectional screw (19) is rotatably connected to the inner upper end of the connecting block, the inner bottom of the connecting block is fixedly connected to a sliding rod, and the positioning plate (20) is slidably connected to the sliding rod.

6. The offshore wind power foundation anti-scour device according to claim 1, characterized in that: The inner end of the bracket (3) is threadedly connected to a fixing ring (2), and the inner end of the fixing ring (2) is fixedly connected to a mounting ring (7), and there is a certain distance between the fixing ring (2) and the mounting ring (7).

7. The offshore wind power foundation anti-scour device according to claim 6, characterized in that: The inner end of the fixing ring (2) is fixedly connected to a plurality of pillars (9), an inner groove (27) is provided inside the pillar (9), the inner end of the inner groove (27) is fixedly connected to a buffer spring (25), the other end of the buffer spring (25) is fixedly connected to a limit plate (24), and the other end of the limit plate (24) is fixedly connected to a movable column (26).

8. The offshore wind power foundation anti-scour device according to claim 7, characterized in that: The other end of the movable column (26) passes through the pillar (9) and the mounting ring (7) and is fixedly connected inwardly to a spherical body (10); the inner upper end of the connecting ring (5) is fixedly connected to a sheath (12); the outer end of the sheath (12) is fixedly connected to an arc-shaped protrusion (11); and the arc-shaped protrusion (11) corresponds to the spherical body (10).

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