Pile foundation anti-scour protection device for offshore wind power installation

Abstract

The invention discloses a pile foundation anti-scour protection device for offshore wind power installation, and particularly relates to the technical field of offshore wind power, the pile foundation anti-scour protection device for offshore wind power installation comprises a pile foundation body, seawater scoured to the pile foundation body can be resisted through a water baffle, and under the rebound acting force of a spring, the pile foundation body can be prevented from being scoured to the pile foundation body. The water baffle is pushed to rebound to weaken the seawater impact force, the seawater impact force is further weakened through water permeable holes formed in the surfaces of the porous wave absorbing columns, finally, when the seawater impact drives the rotating fan blades to rotate, the rotating fan blades rotate to unload the impact force of the seawater, and therefore multi-layer seawater scouring weakening is achieved. At ordinary times, the vertical-axis savonus water wheel can be driven to rotate through impact of sea waves, so that the cleaning plate can be driven to perform sliding cleaning on the surface of the water baffle, and the motor can be driven to drive the cleaning plate to clean the water baffle, so that marine organisms or stains attached to the surface of the water baffle can be effectively cleaned, and the service life of the water baffle is prolonged.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power technology, specifically to a pile foundation erosion protection device for offshore wind power installation. Background Technology

[0002] Offshore wind turbine foundations are the "underwater foundation" of wind turbines, playing a crucial role in supporting the tower and absorbing wind and wave loads. They mainly include monopiles, jacket foundations, and driven piles. Monopiles are widely used due to their high construction efficiency, with diameters reaching 6-10 meters and lengths exceeding 80 meters, requiring a depth of 30-60 meters into the seabed to ensure stability. Foundations typically use high-strength steel or marine concrete, coated with multiple layers of anti-corrosion coatings (such as epoxy powder + polyurethane), and equipped with sacrificial anodes for cathodic protection to resist seawater corrosion. During installation, they are driven into the seabed using piling vessels or drilling equipment, requiring precise control of verticality to avoid uneven stress distribution. They must not only bear the weight of the wind turbine (up to thousands of tons) but also withstand wave impacts, ocean current thrust, and seismic loads. Their design life must match that of the wind turbine (25-30 years), making them a critical structural guarantee throughout the entire lifecycle of offshore wind power, from design to operation and maintenance. Scour protection of offshore wind turbine foundations is a key technology for ensuring wind turbine safety. Its core principle is to prevent the continuous erosion of the pile foundation and surrounding seabed by seawater through engineering measures. The device reduces the direct scouring of the pile foundation surface by high-speed water flow through a triple action of diversion, energy dissipation, and bed stabilization, avoiding damage to the anti-corrosion layer and structural wear. Simultaneously, it inhibits the formation of scour pits by seabed sediment erosion, preventing insufficient pile foundation depth from reducing overturning resistance. Commonly used technologies include riprap foundation protection, biomimetic guide plates, and gabion cages. New ecological devices can also incorporate habitat creation. These measures can extend the lifespan of the pile foundation to over 20 years, providing a fundamental guarantee for the stable operation of offshore wind power.

[0003] Currently, the most common anti-scour device is the rock-throwing protection method. This method involves throwing rocks into a specific area to form a protective layer to resist erosion by natural forces such as water flow, waves, and tides. However, the rock-throwing protection method has obvious drawbacks. The rocks are easily washed away by high-speed water flow, causing the protection to fail. It requires regular replenishment, consumes a large amount of materials, and has high transportation costs. Furthermore, the protection effect of the rocks is relatively simple and cannot resist the impact of water flow in multiple layers. Therefore, we propose an anti-scour protection device and method for pile foundations in offshore wind power installation to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a pile foundation erosion protection device for offshore wind power installation, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A pile foundation scour protection device for offshore wind power installation includes a pile foundation body. A pile foundation base fixing plate is provided at the bottom of the pile foundation body. A square rotating disk that can rotate with the impact of seawater is installed on the outside of the pile foundation body. Multiple square connecting plates are installed on the outside of the square rotating disk. A first cylindrical connecting rod is installed on the outside of each square connecting plate. A water-blocking plate that can block seawater and bounce back with the impact of seawater is installed on the outside of the first cylindrical connecting rod. A rotatable rotating frame is fitted around the outside of the pile foundation body. Multiple rotating fan blades that can rotate with the impact of seawater are provided on the outside of the rotating frame. A rotatable porous wave-dissipating column is fitted around the outside of the rotating frame. The rotating fan blades are located between the rotating frame and the porous wave-dissipating column. Seawater can enter between the rotating frame and the porous wave-dissipating column through the porous wave-dissipating column. The bottom ends of the rotating circular frame and the porous wave-damping column are rotatably connected to the pile foundation base fixing plate. The exterior of the water baffle is equipped with a cleaning component for a cleanable surface.

[0006] Preferably, a spring is fixedly connected to the outside of the square connecting plate, the spring is located inside the first cylindrical connecting rod, and a second cylindrical connecting rod is fixedly connected to the end of the spring away from the square connecting plate. The second cylindrical connecting rod is slidably connected inside the first cylindrical connecting rod, and the outside of the second cylindrical connecting rod is fixedly connected to the baffle plate.

[0007] Preferably, the rotating circular frame is rotatably connected to the top of the pile foundation base fixing plate, the bottom of the pile foundation base fixing plate is rotatably connected to a plurality of cylindrical rotating disks, and the top of the cylindrical rotating disks is rotatably connected to rotating fan blades.

[0008] Preferably, the cleaning assembly includes a cleaning plate, a vertical axis Savonius waterwheel, and a threaded rod; The baffle plate has a first sliding groove on its outer side. A threaded rod is rotatably connected inside the first sliding groove. A cleaning plate is threadedly connected to the outer side of the threaded rod. A vertical axis Savonius water wheel is rotatably connected to the bottom of the baffle plate. The central axis of the vertical axis Savonius water wheel passes through the baffle plate and is fixedly connected to the threaded rod. The central axis of the vertical axis Savonius water wheel extends into the baffle plate and is fitted with a first gear. A motor is installed inside the baffle plate. A second gear is fixedly connected to the output shaft of the motor. The second gear meshes with the first gear.

[0009] Preferably, a second sliding groove is provided on the outer side of the baffle plate opposite to the first sliding groove, and the cleaning plate is slidably connected to the second sliding groove. The cleaning plate can contact the outer side of the baffle plate for cleaning the outer side of the baffle plate.

[0010] Preferably, a tightly fitting silicone sleeve is provided between the first cylindrical connecting rod and the second cylindrical connecting rod.

[0011] Preferably, the porous wave-dissipating column has multiple equidistantly distributed permeable holes on its exterior, allowing seawater to flow between the porous wave-dissipating column and the rotating circular frame. The porous wave-dissipating column is rotatably connected to the bottom of the square rotating disk and the top of the pile foundation base fixing disk.

[0012] Preferably, the baffle plate is inclined, the second cylindrical connecting rods are arranged vertically, and the distance between the end of the second cylindrical connecting rod near the square connecting plate and the square connecting plate is equal. At the same time, the length of the second cylindrical connecting rod at the top is shorter than that of the second cylindrical connecting rod at the bottom.

[0013] Preferably, the blades of the vertical axis Savonius turbine are symmetrical S-shaped, and the blades of the vertical axis Savonius turbine can fully impact and contact seawater from all directions.

[0014] Preferably, the blades on the outside of the rotating fan blades are vertical and can come into contact with seawater that enters between the porous wave-damping column and the rotating frame through the water-permeable holes.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This is a pile foundation scour protection device for offshore wind power installation. It can block seawater scour towards the pile foundation through a water baffle. Under the rebound force of the spring, when the water baffle is impacted, the spring pushes the water baffle to rebound, thereby weakening the impact force of seawater. The water-permeable holes opened on the surface of the porous wave-dissipating column further weaken the impact of seawater. Finally, when seawater enters the porous wave-dissipating column, it will impact and drive the rotating fan blades to rotate. The rotation of the fan blades will deflect the impact force of seawater. In this way, multiple layers of seawater scour are weakened, better protecting the pile foundation from erosion. It does not require frequent maintenance and saves time and effort.

[0016] 2. This pile foundation erosion protection device for offshore wind power installation can be driven by the impact of waves from all directions to rotate the vertical axis Savonius water turbine. This allows the cleaning plate to slide and clean the surface of the baffle plate. It can also drive the motor to drive the cleaning plate to perform deep cleaning of the baffle plate. This reduces the workload of the motor, saves resources, and improves work efficiency. It can effectively clean marine organisms or stains attached to the surface of the baffle plate, prevent the baffle plate from being corroded, and extend the service life of the baffle plate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the structure in this invention; Figure 3 This is a schematic diagram of the structure in cross-section from the side in this invention; Figure 4 This is a top-view cross-sectional structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the structure from another angle side view in this invention; Figure 6 This is an enlarged structural diagram of point A in this invention.

[0019] In the diagram: 1. Pile foundation body; 2. Pile foundation base fixing plate; 3. Square rotating disk; 4. Perforated wave-damping column; 5. Square connecting plate; 6. Water baffle plate; 7. Cleaning plate; 8. Vertical axis Savonius water wheel; 9. First sliding groove; 10. Threaded rod; 11. Second sliding groove; 12. First cylindrical connecting rod; 13. Spring; 14. Second cylindrical connecting rod; 15. Rotating circular frame; 16. Cylindrical rotating disk; 17. Rotating fan blade; 18. Motor; 19. Water-permeable hole; 20. Circular groove; 21. First gear; 22. Second gear. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1 like Figures 1-6As shown, this is the first embodiment of the present invention. This embodiment provides a pile foundation anti-scour protection device for offshore wind power installation, including a pile foundation body 1. A pile foundation base fixing plate 2 is provided at the bottom of the pile foundation body 1. A square rotating disk 3 that can rotate with the impact of seawater is installed on the outside of the pile foundation body 1. Multiple square connecting plates 5 are installed on the outside of the square rotating disk 3. A first cylindrical connecting rod 12 is installed on the outside of each square connecting plate 5. A water baffle 6 that can block seawater and can bounce back with the impact of seawater is installed on the outside of the first cylindrical connecting rod 12. A rotatable rotating circular frame 15 is sleeved on the outside of the pile foundation body 1. Multiple rotating fan blades 17 that can rotate with the impact of seawater are provided on the outside of the rotating circular frame 15. A rotatable porous wave-dissipating column 4 is sleeved on the outside of the rotating circular frame 15. The rotating fan blades 17 are located between the rotating circular frame 15 and the porous wave-dissipating column 4. Seawater can enter between the rotating circular frame 15 and the porous wave-dissipating column 4 through the porous wave-dissipating column 4. The bottom ends of the rotating circular frame 15 and the porous wave-damping column 4 are rotatably connected to the pile foundation base fixing plate 2; The exterior of the water baffle 6 is equipped with a cleaning component for a cleanable surface.

[0022] It should be noted that in this embodiment, when seawater impacts the pile foundation 1, it is blocked by the baffle plate 6. When the seawater impacts the baffle plate 6, the square rotating disk 3 rotates with the impact, driving the baffle plate 6 to rotate as well. The kinetic energy of the water flow is transferred to the baffle plate 6 through the collision. The impact of the seawater pushes the baffle plate 6, compressing the spring 13 and causing the baffle plate 6 to displace, thereby directly reducing the instantaneous impact of the seawater. When the impact force of the seawater weakens, the elastic potential energy of the spring 13 is converted into the kinetic energy of the baffle plate 6, pushing the baffle plate 6 to rebound and pushing some of the energy back into the water flow. At this time, the flow velocity of the seawater impact decreases, and the impact force of the water flow weakens simultaneously. The weakened seawater flows towards the outside of the porous wave-damping column 4, causing the water flow through the porous wave-damping column 4 to be diverted. Part of the water flow is diverted by the porous wave-damping column 4. The obstruction reduces the amount and force of direct impact from the water, further weakening the impact of seawater. The weakened seawater penetrates between the porous wave-damping column 4 and the rotating frame 15, impacting the rotating fan blade 17. When the rotating fan blade 17 is impacted by the water flow, it drives the rotating frame 15 to rotate synchronously. The rotating fan blade 17 rotates due to the impact, and the concentrated rotation of the rotating fan blade 17 disturbs the water flow. The friction and collision between water molecules in the originally relatively stable water flow continuously consume kinetic energy, causing the water flow speed to gradually decrease. The force of subsequent impacts is naturally weakened. In this way, the impact of seawater can be weakened multiple times, effectively reducing the erosion of the pile foundation 1 by seawater. In addition, the cleaning component can clean the marine organisms or stains attached to the surface of the water baffle 6, which can improve the service life of the water baffle 6 and better protect the pile foundation 1.

[0023] Furthermore, a preferred method for the water baffle 6 to rebound and move is as follows: a spring 13 is fixedly connected to the outside of the square connecting plate 5, the spring 13 is located inside the first cylindrical connecting rod 12, and a second cylindrical connecting rod 14 is fixedly connected to the end of the spring 13 away from the square connecting plate 5. The second cylindrical connecting rod 14 is slidably connected inside the first cylindrical connecting rod 12, and the outside of the second cylindrical connecting rod 14 is fixedly connected to the water baffle 6.

[0024] It should be noted that in this embodiment, the square connecting plate 5 will drive the spring 13 to rotate under the impact of seawater. The spring 13 will further drive the water baffle 6 to rotate through the second cylindrical connecting rod 14. While the water baffle 6 is rotating, it will disturb the water flow, thereby reducing the impact force of the water flow. The water flow will compress the spring 13 by squeezing the water baffle 6. When the squeezing force of the water flow is less than the rebound force of the spring 13, the spring 13 will rebound and push the second cylindrical connecting rod 14 to drive the water baffle 6 to exert a counter-propulsion force on the water flow, thereby further weakening the impact of the water flow. Based on the above, the water baffle 6 is used to block the seawater, which can weaken the impact of the seawater. In conjunction with the compression and rebound force of the spring 13, the water baffle 6 can push the seawater to impact the seawater in the opposite direction, thereby further weakening the impact of the seawater, preventing the seawater from directly impacting the pile foundation body 1, and improving the service life of the pile foundation body 1.

[0025] More specifically, the rotating circular frame 15 is rotatably connected to the top of the pile foundation base fixing plate 2, and multiple cylindrical rotating disks 16 are rotatably connected to the bottom of the pile foundation base fixing plate 2. Rotating fan blades 17 are rotatably connected to the top of the cylindrical rotating disks 16.

[0026] It should be noted that in this embodiment, the impact of seawater will cause the rotating frame 15 to rotate. While the rotating frame 15 is rotating, the seawater will hit the rotating fan blade 17 and cause the rotating fan blade 17 to rotate. The rotation of the rotating fan blade 17 disturbs the water flow, thereby further weakening the impact of the water flow. Based on the above, multiple rotatable fan blades 17 are used so that the fan blades 17 will rotate no matter which direction the seawater impacts. The rotation of the fan blades 17 will disturb the seawater, thereby reducing the impact force of the seawater and preventing the seawater from impacting the pile foundation 1 and preventing the pile foundation 1 from being corroded by seawater.

[0027] Example 2 like Figure 1-6 As shown, this is the second embodiment of the present invention, which is based on the previous embodiment.

[0028] The cleaning components include a cleaning plate 7, a vertical axis Savonius waterwheel 8, and a threaded rod 10; The water baffle 6 has a first sliding groove 9 on its outside. A threaded rod 10 is rotatably connected inside the first sliding groove 9. A cleaning plate 7 is threadedly connected to the outside of the threaded rod 10. A vertical shaft Savonius waterwheel 8 is rotatably connected to the bottom of the water baffle 6. The central shaft of the vertical shaft Savonius waterwheel 8 passes through the water baffle 6 and is fixedly connected to the threaded rod 10. The central shaft of the vertical shaft Savonius waterwheel 8 extends into the water baffle 6 and is fitted with a first gear 21. A motor 18 is installed inside the water baffle 6. A second gear 22 is fixedly connected to the output shaft of the motor 18. The second gear 22 meshes with the first gear 21.

[0029] It should be noted that, in this embodiment, under normal circumstances, the vertical axis Savonius waterwheel 8 can be rotated by the impact of seawater. At the same time as the vertical axis Savonius waterwheel 8 rotates, the threaded rod 10 rotates synchronously. The synchronous rotation of the threaded rod 10 can drive the cleaning plate 7 to slide inside the first sliding groove 9, so that the cleaning plate 7 can slide on the surface of the baffle plate 6 and clean the surface of the baffle plate 6. When it is necessary to deeply clean the surface of the baffle plate 6, the cylindrical rotating disk 16 can be driven to drive the second gear 22 to rotate, which in turn drives the first gear 21 to rotate, which drives the threaded rod 10 to drive the cleaning plate 7 to deeply clean the surface of the baffle plate 6. This can prevent the accumulation of marine organisms or stains on the surface of the baffle plate 6, prevent secretions from corroding the baffle plate 6, and improve the service life of the baffle plate 6. Based on the above, by adopting both general and deep cleaning methods, the natural resources of seawater impact can be effectively utilized. On a normal day, the impact force of seawater can drive the vertical axis Savonius waterwheel 8 to rotate and simply clean the dirt on the surface of the baffle plate 6. When deep cleaning is required, it is driven by the motor 18, which reduces the workload of the motor 18, saves resources, and improves work efficiency.

[0030] Furthermore, a preferred embodiment of the cleaning component is that a second sliding groove 11 is provided on the outside of the baffle plate 6 at a position opposite to the first sliding groove 9, and the cleaning plate 7 is slidably connected to the second sliding groove 11. The cleaning plate 7 can contact the outside of the baffle plate 6 for cleaning the outside of the baffle plate 6.

[0031] A tightly fitting silicone sleeve is provided between the first cylindrical connecting rod 12 and the second cylindrical connecting rod 14.

[0032] The porous wave-dissipating column 4 has multiple equally spaced permeable holes 19 that allow seawater to flow between the porous wave-dissipating column 4 and the rotating circular frame 15. The porous wave-dissipating column 4 is rotatably connected to the bottom of the square rotating disk 3 and the top of the pile foundation base fixing disk 2.

[0033] The baffle plate 6 is tilted at 45 degrees, the second cylindrical connecting rod 14 is arranged vertically, and the distance between the end of the second cylindrical connecting rod 14 near the square connecting plate 5 and the square connecting plate 5 is equal. At the same time, the length of the second cylindrical connecting rod 14 at the top is shorter than that of the second cylindrical connecting rod 14 at the bottom.

[0034] It should be noted that in this embodiment, the cleaning plate 7 can slide better on the surface of the baffle plate 6 through the second sliding groove 11. When seawater impacts the porous wave-dissipating column 4, it will enter the interior of the porous wave-dissipating column 4 through the water-permeable holes 19 on the surface of the porous wave-dissipating column 4. Due to the impact of seawater, the porous wave-dissipating column 4 itself will rotate. Based on the above, by having the cleaning plate 7 slide synchronously within the second sliding groove 11 and the first sliding groove 9, it can effectively prevent damage from seawater impact during the cleaning of the surface of the baffle plate 6. The cleaning plate 7 and the baffle plate 6 are in close contact to prevent the adhesion of some small stains, making the cleaning more comprehensive and thorough. The silicone sleeve can effectively prevent seawater from penetrating into the interior of the first cylindrical connecting rod 12 when the second cylindrical connecting rod 14 slides, which can improve the service life of the spring 13. Since the baffle plate 6 is tilted at 45 degrees, it can effectively guide the impacting seawater upward and gradually dissipate it, thereby effectively preventing the pile foundation body 1 from being eroded by seawater.

[0035] Furthermore, the blades of the vertical axis Savonius turbine 8 are symmetrical S-shaped, and the blades of the vertical axis Savonius turbine 8 can fully impact and contact seawater from all directions.

[0036] The blades on the outside of the rotating fan blade 17 are vertical and can come into contact with the seawater that enters between the porous wave-damping column 4 and the rotating circular frame 15 through the water-permeable hole 19.

[0037] It should be noted that in this embodiment, through the impact of seawater, the seawater can fully contact the surface blades of the vertical axis Savonius turbine 8. When the seawater passes through the water-permeable holes 19 on the surface of the porous wave-damping column 4, the seawater can contact the blades of the rotating fan blade 17.

[0038] Based on the above, the blades of the Savonius turbine 8, which are symmetrically S-shaped, can fully contact the seawater impacting from all directions. The impact force of the seawater is fully utilized to drive the cleaning plate 7 to clean the baffle plate 6, preventing marine organisms or dirt from accumulating on the surface of the baffle plate 6 and improving the service life of the baffle plate 6. The blades of the rotating fan blade 17 are vertical, which can better contact the seawater when it impacts, so as to drive the rotating fan blade 17 to rotate, thereby weakening the impact of the seawater.

[0039] In summary, this pile foundation scour protection device for offshore wind power installation, when seawater impacts the pile foundation 1, first strikes the surface of the baffle plate 6. The baffle plate 6 can resist the seawater scouring towards the pile foundation 1. Furthermore, due to the rebound force of the spring 13, when the baffle plate 6 is impacted, the spring 13 undergoes elastic deformation, converting some of the seawater's kinetic energy into the elastic potential energy of the spring 13. When the impact force of the seawater weakens, the elastic potential energy of the spring 13 is converted back into the kinetic energy of the baffle plate 6, pushing the second cylindrical connecting rod 14 to rebound. The water-repelling plate 6 rebounds, thus redirecting some of the energy back into the water flow, weakening the impact of the seawater. When the weakened seawater continues to impact the surface of the porous wave-dissipating column 4, the permeable holes 19 on the surface of the column divert the seawater flow, dissipating its energy and further weakening the impact. Finally, the seawater enters the space between the porous wave-dissipating column 4 and the rotating frame 15, impacting the rotating fan blades 17 and causing them to rotate. The rotation of the fan blades 17 significantly reduces the impact of the seawater, thus providing multi-layered protection for the pile foundation 1. To prevent impact erosion of the pile foundation 1, the impact of seawater from any direction during normal times can drive the vertical axis Savonius waterwheel 8 to rotate. The vertical axis Savonius waterwheel 8 drives the threaded rod 10 to rotate, which in turn drives the cleaning plate 7 to slide on the surface of the baffle plate 6, thus roughly cleaning the surface of the baffle plate 6. At regular intervals, the drive motor 18 drives the second gear 22 to rotate, the second gear 22 drives the first gear 21 to rotate, and the first gear 21 drives the threaded rod 10 to rotate and drive the cleaning plate 7 to carefully clean the surface of the baffle plate 6, thereby preventing corrosion from marine organisms or accumulation of stains and improving the service life of the baffle plate 6.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pile foundation scour protection device for offshore wind power installation, comprising a pile foundation body (1), wherein a pile foundation base fixing plate (2) is provided at the bottom of the pile foundation body (1), characterized in that: The pile base (1) is equipped with a square rotating disk (3) that can rotate with the impact of seawater. Multiple square connecting plates (5) are installed on the outside of the square rotating disk (3). A first cylindrical connecting rod (12) is installed on the outside of each square connecting plate (5). A water baffle (6) that can block seawater and can bounce back with the impact of seawater is installed on the outside of the first cylindrical connecting rod (12). A rotatable rotating circular frame (15) is fitted on the outside of the pile base (1). Multiple rotating fan blades (17) that can rotate with the impact of seawater are provided on the outside of the rotating circular frame (15). A rotatable porous wave-damping column (4) is fitted on the outside of the rotating circular frame (15). The rotating fan blades (17) are located between the rotating circular frame (15) and the porous wave-damping column (4). Seawater can enter between the rotating circular frame (15) and the porous wave-damping column (4) through the porous wave-damping column (4). The bottom ends of the rotating circular frame (15) and the porous wave-damping column (4) are rotatably connected to the pile foundation base fixing plate (2); The water baffle (6) is equipped with a cleaning component for a cleanable surface.

2. The anti-scouring protection device for pile foundations used in offshore wind power installation according to claim 1, characterized in that: A spring (13) is fixedly connected to the outside of the square connecting plate (5). The spring (13) is located inside the first cylindrical connecting rod (12). A second cylindrical connecting rod (14) is fixedly connected to the end of the spring (13) away from the square connecting plate (5). The second cylindrical connecting rod (14) is slidably connected inside the first cylindrical connecting rod (12). The outside of the second cylindrical connecting rod (14) is fixedly connected to the baffle plate (6).

3. The pile foundation scour protection device for offshore wind power installation according to claim 2, characterized in that: The rotating circular frame (15) is rotatably connected to the top of the pile foundation base fixing plate (2), and the bottom of the pile foundation base fixing plate (2) is rotatably connected to a plurality of cylindrical rotating plates (16), and the top of the cylindrical rotating plates (16) is rotatably connected to rotating fan blades (17).

4. The pile foundation scour protection device for offshore wind power installation according to claim 3, characterized in that: The cleaning assembly includes a cleaning plate (7), a vertical axis Savonius waterwheel (8), and a threaded rod (10). The baffle plate (6) has a first sliding groove (9) on its outside. A threaded rod (10) is rotatably connected inside the first sliding groove (9). A cleaning plate (7) is threadedly connected to the outside of the threaded rod (10). A vertical shaft Savonius waterwheel (8) is rotatably connected to the bottom of the baffle plate (6). The central shaft of the vertical shaft Savonius waterwheel (8) passes through the baffle plate (6) and is fixedly connected to the threaded rod (10). The central shaft of the vertical shaft Savonius waterwheel (8) extends into the baffle plate (6) and is fitted with a first gear (21). A motor (18) is installed inside the baffle plate (6). The output shaft of the motor (18) is fixedly connected to a second gear (22). The second gear (22) meshes with the first gear (21).

5. A pile foundation scour protection device for offshore wind power installation according to claim 4, characterized in that: The water baffle (6) has a second sliding groove (11) on its outer side opposite to the first sliding groove (9). The cleaning plate (7) is slidably connected to the second sliding groove (11). The cleaning plate (7) can contact the outer side of the water baffle (6) for cleaning the outer side of the water baffle (6).

6. A pile foundation scour protection device for offshore wind power installation according to claim 5, characterized in that: A tightly fitting silicone sleeve is provided between the first cylindrical connecting rod (12) and the second cylindrical connecting rod (14).

7. A pile foundation scour protection device for offshore wind power installation according to claim 6, characterized in that: The porous wave-dissipating column (4) has multiple equally spaced permeable holes (19) on its exterior, allowing seawater to flow between the porous wave-dissipating column (4) and the rotating circular frame (15). The porous wave-dissipating column (4) is rotatably connected to the bottom of the square rotating disk (3) and the top of the pile foundation base fixing disk (2).

8. A pile foundation scour protection device for offshore wind power installation according to claim 7, characterized in that: The baffle plate (6) is tilted at 45 degrees, the second cylindrical connecting rod (14) is arranged vertically, and the distance between the end of the second cylindrical connecting rod (14) near the square connecting plate (5) and the square connecting plate (5) is equal. At the same time, the length of the second cylindrical connecting rod (14) at the top is shorter than that of the second cylindrical connecting rod (14) at the bottom.

9. A pile foundation scour protection device for offshore wind power installation according to claim 8, characterized in that: The blades of the vertical axis Savonius turbine (8) are symmetrical S-shaped.

10. A pile foundation scour protection device for offshore wind power installation according to claim 9, characterized in that: The blades on the outside of the rotating fan blade (17) are vertical and can come into contact with the seawater that enters between the porous wave-damping column (4) and the rotating frame (15) through the water-permeable hole (19).

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