Offshore wind power foundation scour protection device

Abstract

The present application relates to the field of wind power generation, in particular to a kind of offshore wind power foundation anti-scour device, including pedestal, buffer mechanism and lifting mechanism;The outer periphery of pedestal is equipped with protective cylinder, and pedestal is equipped with liftable movable float;Protective cylinder is connected with pedestal by buffer mechanism;Lifting mechanism is arranged on pedestal, and lifting mechanism is used to control movable float lifting and descending.Buffer mechanism includes inner plate, outer plate and buffer assembly;Inner plate is connected with pedestal, and outer plate is connected with the inner wall of protective cylinder;Inner plate is equipped with inner rod, and outer plate is connected with outer rod, and outer rod is slidingly matched with inner rod;Inner plate is connected with outer plate by buffer assembly.The present application achieves the effect of significantly improving the anti-scour ability and overall stability of offshore wind power foundation: protective cylinder avoids the direct impact of water flow on pedestal, reduces the scouring and loss of silt around foundation;Solve the technical problem that the stability of wind power foundation is reduced due to the impact of seawater undercurrent.

Description

Technical Field

[0001] This invention relates to the field of wind power generation, specifically to an anti-scouring device for offshore wind power foundations. Background Technology

[0002] Scour protection mechanisms for offshore wind turbine foundations are crucial for ensuring the long-term stability of the foundation piles. They primarily resist the scour of the seabed surrounding the foundation by hydrodynamic forces such as waves, currents, and tides, preventing seabed erosion that could lead to reduced foundation bearing capacity, structural tilting, or even collapse. However, existing scour protection structures for pile foundations are simplistic and difficult to maintain, making them susceptible to damage during prolonged operation.

[0003] To address this, Chinese Patent No. CN113152504B discloses an anti-scouring system for offshore wind turbine foundations. This system uses a flow-guiding mechanism to direct seawater currents upwards or downwards, thereby washing away or carrying away sediment from the top of the foundation, effectively cleaning the sediment and preventing its accumulation and corrosion. The installation mechanism facilitates better securing of the equipment to the seabed surface, preventing it from shaking or detaching. The anti-loss mechanism further reinforces the sediment on the seabed near the equipment, preventing it from loosening and causing the equipment to shake or detach. Additionally, the formed seaweed or other marine plants can shield the foundation from sediment, preventing it from impacting the foundation and causing corrosion and wear.

[0004] However, existing scour protection devices are complex in structure and only target the surface scour of the seabed, failing to withstand the impact of subsurface currents. When the subsurface portion is shaken by water currents, wind turbines are prone to collapse, resulting in severe economic losses. Summary of the Invention

[0005] To address the aforementioned issues, an anti-scouring device for offshore wind power foundations is provided. This device solves the technical problem of reduced stability of wind power foundations caused by the impact of seawater currents through a base, buffer mechanism, and lifting mechanism.

[0006] To address the problems of existing technologies, this invention provides an anti-scouring device for offshore wind power foundations, comprising a base, a buffer mechanism, and a lifting mechanism; a protective cylinder is fitted around the outer periphery of the base, and a movable float that can be raised and lowered is provided on the base; the protective cylinder is connected to the base through the buffer mechanism; the lifting mechanism is installed on the base and is used to control the raising and lowering of the movable float.

[0007] Preferably, the buffer mechanism has at least three sets, and the multiple sets of buffer mechanisms are evenly distributed around the circumference of the protective cylinder; the buffer mechanism includes an inner plate, an outer plate, and a buffer assembly; the inner plate is connected to the base, and the outer plate is connected to the inner wall of the protective cylinder; the inner plate is provided with an inner rod, and the outer plate is connected with an outer rod, and the outer rod and the inner rod are in sliding fit; the inner plate is connected to the outer plate through the buffer assembly.

[0008] Preferably, the lifting mechanism includes a support plate and an adjusting plate. The support plate is connected to the movable float, and a second elastic element is provided on the support plate. The two ends of the second elastic element are respectively connected to the support plate and the adjusting plate, and the second elastic element is located on the side away from the movable float. A transmission mechanism is provided on the base. When the buffer assembly is compressed, the power is transmitted through the transmission mechanism to drive the movable float to move upward.

[0009] Preferably, the buffer assembly includes a hinge seat, a first elastic element, and a connecting rod; a slide rail is provided on the inner plate, and the hinge seat is slidably mounted on the slide rail; both ends of the first elastic element are respectively connected to the hinge seat and the inner plate; one end of the connecting rod is hinged to the outer plate, and the other end of the connecting rod is hinged to the hinge seat.

[0010] Preferably, the transmission mechanism includes a second transmission component and a first transmission component; both the second transmission component and the first transmission component are connected to the movable float in a transmission manner; when the buffer component contracts under pressure, the movable float is driven to move upward through the first transmission component; when the buffer component is stretched under tension, the movable float is driven to move upward through the second transmission component.

[0011] Preferably, a movable shell is connected to the hinge seat; a fixed shell is provided on the inner plate, and the movable shell and the fixed shell slide together to form a cavity for accommodating the first elastic element.

[0012] Preferably, the first transmission assembly includes a first end seat, a first upright, and a first connecting frame; the first end seat is disposed at the bottom of the movable float; the two ends of the first upright are respectively connected to the first end seat and the first connecting frame; there are two hinge seats on each inner plate, and the two hinge seats are respectively located on both sides of the inner rod. When the buffer assembly is stretched, the two hinge seats slide away from the inner rod, and the upper hinge seat drives the first connecting frame to move upward when it moves upward.

[0013] Preferably, the second transmission assembly includes a mounting ring, a second end seat, a second connecting frame, a telescopic rod, and a third elastic element; the mounting ring is fixedly sleeved on the movable float; the second end seat is disposed on the mounting ring; the second connecting frame is connected to the second end seat; the two ends of the telescopic rod are respectively connected to the base and the second end seat; and the third elastic element is sleeved on the telescopic rod.

[0014] Preferably, the base is provided with a second upright and a fixed float; the fixed float is connected to the base through the second upright and is located below the base.

[0015] Preferably, the base is provided with a vertical plate for guiding the lifting and lowering of the first connecting frame and the second connecting frame.

[0016] The advantages of this invention compared to the prior art are:

[0017] 1. This invention significantly improves the scour resistance and overall stability of offshore wind power foundations through the base, buffer mechanism, and lifting mechanism: the protective cylinder avoids the direct impact of water flow on the base, reducing the scour and loss of sediment around the foundation; the buffer mechanism effectively reduces the impact force on the base and extends the service life of the device; the gravity adjustment of the movable float can quickly stabilize its position when the base is impacted and shaken, ensuring that the wind power foundation remains stable in complex marine environments, and solving the technical problem of reduced stability of wind power foundations caused by the impact of seawater currents.

[0018] 2. This invention achieves the function of dispersing and buffering the impact force of seawater currents on the protective cylinder. Multiple sets of circumferentially evenly distributed buffering mechanisms can uniformly transmit and absorb the impact force. Through the cooperation of inner rods, outer rods and buffering components, it can flexibly respond to and dissipate the impact force when the protective cylinder is deflected by the impact. Through these functions, the buffering efficiency and the connection stability between the protective cylinder and the base are improved. Multiple sets of evenly distributed buffering mechanisms avoid damage caused by excessive local stress. The sliding cooperation between the inner rods and outer rods makes the buffering process smoother. The buffering components effectively absorb the impact energy, further reducing the impact force on the base and extending the overall service life of the device. This device solves the technical problem that traditional buffering structures have poor buffering effect and are prone to local damage to the protective cylinder or base due to uneven distribution or unreasonable structural design when dealing with the impact of seawater currents.

[0019] 3. This invention achieves the function of controlling the raising and lowering of the movable float through a support plate, an adjusting plate, and a transmission mechanism. Furthermore, the transmission mechanism is triggered when the buffer assembly is compressed, thereby driving the movable float upwards. Simultaneously, a second elastic element assists in adjusting the relative position of the support plate and the adjusting plate, providing elastic buffering and reset support for the raising and lowering of the movable float. The cooperation of these mechanisms achieves the effect of real-time impact response and rapid base stabilization. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of an anti-scouring device for offshore wind power foundations according to the present invention.

[0021] Figure 2 This is a three-dimensional schematic diagram of a single base and protective cylinder of an anti-scour device for offshore wind power foundations according to the present invention.

[0022] Figure 3 This is a three-dimensional schematic diagram of the base, buffer mechanism, lifting mechanism and transmission mechanism of an anti-scour device for offshore wind power foundations according to the present invention in the initial state.

[0023] Figure 4 This is a three-dimensional schematic diagram of the base, buffer mechanism, lifting mechanism and transmission mechanism of an offshore wind power foundation anti-scour device of the present invention when the buffer mechanism on one side is under pressure.

[0024] Figure 5 This is the invention Figure 4 A magnified view of a portion of point A in the middle.

[0025] Figure 6 This is a three-dimensional schematic diagram of a buffer component of an anti-scouring device for offshore wind power foundations according to the present invention.

[0026] Figure 7 This is a three-dimensional schematic diagram of the movable float, buffer mechanism and transmission mechanism of an anti-scour device for offshore wind power foundations according to the present invention.

[0027] Figure 8 This is the invention Figure 7 A magnified view of a portion of point B in the middle.

[0028] Figure 9 This is the invention Figure 7 A magnified view of a portion of point C.

[0029] Figure 10 This is a cross-sectional perspective view of the transmission mechanism and base of an anti-scour device for offshore wind power foundations according to the present invention.

[0030] The diagram is labeled as follows: 1. Base; 11. Protective cylinder; 12. Movable float; 13. Second upright; 14. Fixed float; 15. Upright plate; 2. Buffer mechanism; 21. Inner plate; 211. Inner rod; 212. Fixed shell; 213. Movable shell; 22. Outer plate; 221. Outer rod; 23. Buffer assembly; 231. Hinge seat; 2311. Push block; 232. First elastic element; 233. Connecting rod; 3. Lifting mechanism; 31. Support plate; 311. Second elastic element; 32. Adjusting plate; 4. Transmission mechanism; 41. First transmission assembly; 411. First end seat; 412. First upright; 413. First connecting frame; 42. Second transmission assembly; 421. Mounting ring; 422. Second end seat; 423. Second connecting frame; 424. Telescopic rod; 425. Third elastic element. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figures 1-3 A scour protection device for offshore wind power foundations includes a base 1, a buffer mechanism 2, and a lifting mechanism 3. A protective cylinder 11 is fitted around the outer periphery of the base 1, and a movable float 12 that can be raised and lowered is provided on the base 1. The protective cylinder 11 is connected to the base 1 through the buffer mechanism 2. The lifting mechanism 3 is provided on the base 1 and is used to control the raising and lowering of the movable float 12.

[0033] This invention significantly improves the scour resistance and overall stability of offshore wind turbine foundations through the use of a base 1, a buffer mechanism 2, and a lifting mechanism 3. The protective cylinder 11 prevents direct impact from water flow on the base 1, reducing the erosion and loss of sediment around the foundation. The buffer mechanism 2 effectively reduces the impact force on the base 1, extending the service life of the device. The gravity adjustment of the movable float 12 can quickly stabilize the position of the base 1 when it is impacted and shaken, ensuring the stability of the wind turbine foundation in complex marine environments and solving the technical problem of decreased stability caused by seawater currents. The device includes three bases 1 arranged in a circular array and connected by rods. A protective cylinder 11 is fitted around the outer periphery of the base 1, and the protective cylinder 11 is located below the sea surface during operation. The protective cylinder 11 is connected to the base 1 through the buffer mechanism 2. A movable float 12 controlled by the lifting mechanism 3 is installed on the base 1. During operation, the protective cylinder 11 directly withstands the impact of the undercurrent, preventing the water flow from directly scouring the base 1. The buffer mechanism 2 deforms under the impact, absorbing the impact energy and allowing the axis of the protective cylinder 11 to shift relative to the axis of the base 1, reducing the transmission of impact force to the base 1. When the protective cylinder 11 is impacted, the buffer mechanism 2 extends or retracts accordingly under the impact force. The protective cylinder 11 shifts in the corresponding direction. At this time, the lifting mechanism 3 drives the movable float 12 to move upward, reducing the buoyancy of the movable float 12. The stabilizing torque generated by the gravity of the base 1 suppresses the shift of the base 1, restoring the foundation balance. This protective mechanism, combined with the circular array distribution of the base 1, can effectively disperse the impact force of the water flow, significantly improving the scouring resistance and overall stability of offshore wind power foundations in complex marine environments.

[0034] Reference Figures 1-3 The buffer mechanism 2 is provided with at least three sets, and the multiple sets of buffer mechanisms 2 are evenly distributed around the protective cylinder 11. The buffer mechanism 2 includes an inner plate 21, an outer plate 22 and a buffer assembly 23. The inner plate 21 is connected to the base 1, and the outer plate 22 is connected to the inner wall of the protective cylinder 11. An inner rod 211 is provided on the inner plate 21, and an outer rod 221 is connected to the outer plate 22. The outer rod 221 and the inner rod 211 are slidably engaged. The inner plate 21 is connected to the outer plate 22 through the buffer assembly 23.

[0035] This invention achieves the function of dispersing and buffering the impact force of seawater currents on the protective cylinder 11. Multiple sets of circumferentially evenly distributed buffering mechanisms 2 can uniformly transmit and absorb the impact force. Through the cooperation of the inner rod 211, the outer rod 221 and the buffer assembly 23, the protective cylinder 11 can flexibly respond and dissipate the impact force when it is deflected by the impact. Through these functions, the buffering efficiency and the connection stability between the protective cylinder 11 and the base 1 are improved. Multiple sets of evenly distributed buffering mechanisms 2 avoid damage caused by excessive local stress. The sliding cooperation between the inner rod 211 and the outer rod 221 makes the buffering process smoother. The buffer assembly 23 effectively absorbs the impact energy, further reducing the impact force on the base 1 and extending the overall service life of the device. This device solves the technical problem that traditional buffering structures have poor buffering effect and are prone to local damage to the protective cylinder 11 or the base 1 due to uneven distribution or unreasonable structural design when dealing with the impact of seawater currents. When the seawater current impacts the protective cylinder 11, the outer plate 22 of its inner wall will drive the outer rod 221 to move after the protective cylinder 11 is subjected to force. The outer rod 221 will slide relative to the inner rod 211 on the inner plate 21. At the same time, the buffer component 23 between the inner plate 21 and the outer plate 22 will be squeezed or stretched. Since multiple sets of buffer mechanisms 2 are evenly distributed around the protective cylinder 11, the impact force can be dispersed to each buffer mechanism 2. The buffer component 23 of each buffer mechanism 2 absorbs the corresponding impact energy. Through this process, the impact force on the protective cylinder 11 is effectively buffered, the impact force is reduced to the base 1, and the stability of the base 1 and the entire device is protected.

[0036] Reference Figure 3 and Figure 4 The lifting mechanism 3 includes a support plate 31 and an adjusting plate 32. The support plate 31 is connected to the movable float 12, and a second elastic element 311 is provided on the support plate 31. The two ends of the second elastic element 311 are respectively connected to the support plate 31 and the adjusting plate 32, and the second elastic element 311 is located on the side away from the movable float 12. A transmission mechanism 4 is provided on the base 1. When the buffer assembly 23 is compressed, the power is transmitted through the transmission mechanism 4 to drive the movable float 12 to move upward.

[0037] This invention achieves the function of controlling the raising and lowering of the movable float 12 through the support plate 31, the adjusting plate 32, and the transmission mechanism 4. The transmission mechanism 4 is triggered when the buffer assembly 23 is compressed, thereby driving the movable float 12 upwards. Simultaneously, the second elastic element 311 assists in adjusting the relative position of the support plate 31 and the adjusting plate 32, providing elastic buffering and reset support for the raising and lowering of the movable float 12. Through the cooperation of these mechanisms, the invention achieves the effect of real-time impact response and rapid stabilization of the base 1. When the buffer assembly 23 is compressed, the transmission mechanism 4 immediately drives the movable float 12 upwards, quickly suppressing the swaying of the base 1 with the help of the float's gravity, preventing foundation displacement. The second elastic element 311 balances the force during the raising and lowering of the movable float 12, reducing wear on the mechanism, and assists in the reset of the movable float 12 after the impact weakens, ensuring the device continuously adapts to changes in the marine environment. This device solves the technical problem that traditional anti-erosion devices are unable to quickly activate the stabilization mechanism when subjected to impact, and the lack of elastic buffering during the stabilization process can easily lead to damage to the mechanism. Traditional devices often require additional manual or independent driving of the stabilizing components, resulting in delayed response and easy wear and tear on components due to rigid adjustment. However, this device achieves simultaneous impact response and stabilization adjustment through the linkage design of the buffer component 23 and the lifting mechanism 3. Combined with the buffer protection of the elastic component, it significantly improves the emergency response capability and service life of the device. When the seawater current impacts the protective cylinder 11, the protective cylinder 11 moves the outer plate 22, causing pressure on the buffer assembly 23. The pressure of the buffer assembly 23 triggers the transmission mechanism 4 on the base 1. The transmission mechanism 4 transmits power under pressure, and the torque drives the lifting mechanism 3 to operate. The adjusting plate 32 in the lifting mechanism 3 is driven by the transmission mechanism 4, and drives the support plate 31 to move through the second elastic element 311. The support plate 31 is connected to the movable float 12, so the support plate 31 will drive the movable float 12 to move upward. After the movable float 12 moves upward, it uses buoyancy to lower, while the gravity remains unchanged, suppressing the shaking of the base 1 caused by the impact. When the impact weakens, the pressure of the buffer assembly 23 decreases, the torque of the transmission mechanism 4 decreases, and the second elastic element 311 will adjust its own deformation according to the force change, driving the support plate 31 and the movable float 12 to slowly return to their original positions. At the same time, throughout the process, the second elastic element 311 always plays a buffering role between the support plate 31 and the adjusting plate 32, avoiding damage caused by rigid contact between the two, and ensuring the stable operation of the lifting mechanism 3. When making active adjustments, the initial height of the movable float 12 can be controlled by adjusting the height of the adjusting plate 32 and by using the pressure transmitted by the second elastic element 311.

[0038] Reference Figures 3-6The buffer assembly 23 includes a hinge seat 231, a first elastic element 232, and a connecting rod 233; a slide rail is provided on the inner plate 21, and the hinge seat 231 is slidably mounted on the slide rail; the two ends of the first elastic element 232 are respectively connected to the hinge seat 231 and the inner plate 21; one end of the connecting rod 233 is hinged to the outer plate 22, and the other end of the connecting rod 233 is hinged to the hinge seat 231.

[0039] This invention achieves flexible buffering and adaptive energy absorption functions through the hinge seat 231, the first elastic element 232, and the connecting rod 233. By coordinating the sliding of the hinge seat 231 on the slide rail, the deformation of the first elastic element 232, and the rotation of the connecting rod 233, the structure of the protective cylinder 11 can be adjusted according to the direction and force of the impact to fully absorb the impact energy, while maintaining the connection stability between the inner plate 21 and the outer plate 22, thus improving buffering adaptability and energy absorption efficiency. Regardless of the direction from which the undercurrent impacts the protective cylinder 11, the connecting rod 233 can drive the hinge seat 231 to slide along the slide rail, causing the first elastic element 232 to undergo corresponding tensile or compressive deformation, precisely adapting to impact forces from different directions and avoiding localized stress concentration. The deformation process of the first elastic element 232 can efficiently absorb impact energy, significantly weakening the impact force transmitted to the base 1, reducing the shaking of the base 1 caused by the impact, and protecting the connection structure between the protective cylinder 11 and the base 1 from damage. A hydraulic damping rod is provided between the hinge seat 231 and the inner plate 21. The first elastic element 232 is sleeved on the hydraulic damping rod. When the impact force on the protective cylinder 11 disappears, the hinge seat 231 is controlled to reset under the elastic force of the first elastic element 232. The damping provided by the hydraulic damping rod prevents the protective cylinder 11 from shaking repeatedly. When the seawater current impacts the protective cylinder 11, the protective cylinder 11 drives the outer plate 22 to move. The outer plate 22 will push or pull the connecting rod 233. One end of the connecting rod 233 is hinged to the outer plate 22 and the other end is hinged to the hinge seat 231. Therefore, the connecting rod 233 will drive the hinge seat 231 to slide along the slide rail on the inner plate 21. When the hinge seat 231 slides, it will stretch or compress the first elastic element 232 connected to it. The first elastic element 232 absorbs the energy generated by the impact through its own deformation. The impact force on the protective cylinder 11 is buffered in an all-round and efficient manner by the cooperation of multiple sets of buffer components 23, reducing the impact force on the base 1 and protecting the stable operation of the entire device.

[0040] Reference Figures 2-4 and Figure 7 The transmission mechanism 4 includes a second transmission component 42 and a first transmission component 41; both the second transmission component 42 and the first transmission component 41 are connected to the movable float 12 in a transmission manner; when the buffer component 23 is compressed under pressure, the movable float 12 is driven to move upward through the first transmission component 41; when the buffer component 23 is stretched under tension, the movable float 12 is driven to move upward through the second transmission component 42.

[0041] This invention achieves the function of driving the movable float 12 upward by using the second transmission component 42 and the first transmission component 41. Through the cooperation of the second transmission component 42 and the first transmission component 41, the movable float 12 can be driven upward regardless of whether the buffer component 23 contracts or stretches under impact force. Through these functions, the stability of the base 1 is continuously ensured: when the buffer component 23 is compressed, the first transmission component 41 quickly transmits power to drive the movable float 12 upward, using the weight of the float to suppress the swaying of the base 1; when the buffer component 23 is stretched under tension, the second transmission component 42 intervenes in time to drive the movable float 12 upward; when the protective cylinder 11 is compressed, the buffer component 23 on the compressed side contracts, while the buffer component 23 on the opposite side stretches accordingly. The two transmission components work together to cover all deformation conditions of the buffer component 23 under the impact of ocean currents, ensuring that the movable float 12 can always start the stabilizing function in time, reducing the risk of base 1 displacement. It achieves comprehensive coverage of the deformation state of the buffer component 23, ensuring that the stabilizing function is continuously effective. When the seawater current impacts the protective cylinder 11, compressing the buffer component 23, the compressive force of the buffer component 23 acts on the first transmission component 41. Upon triggering, the first transmission component 41 transmits power, and the torque drives the lifting mechanism 3 to operate, thereby causing the movable float 12 to move upwards. After moving upwards, the movable float 12 stabilizes the position of the base 1 by its own weight. When the impact direction of the current changes, causing the buffer component 23 to be stretched by tension, the tension of the buffer component 23 triggers the second transmission component 42. The second transmission component 42 also transmits power to the lifting mechanism 3, driving the movable float 12 to move upwards. The movable float 12 moves upward to maintain stability on the base 1. Throughout the process, the second transmission component 42 and the first transmission component 41 always correspond to the tensile and compressed states of the buffer component 23, respectively. Regardless of the deformation of the buffer component 23 due to the impact, the movable float 12 can be driven to move upward in time through the corresponding transmission component. At the same time, the second elastic element 311 in the lifting mechanism 3 will assist in adjusting the relative position of the support plate 31 and the adjusting plate 32 to provide buffer for the lifting of the movable float 12, ensuring that the stabilization process is smooth and continuous, and protecting the structure of the device from rigid impact damage.

[0042] Reference Figures 4-6 A movable shell 213 is connected to the hinge seat 231; a fixed shell 212 is provided on the inner plate 21, and the movable shell 213 and the fixed shell 212 slide together to form a cavity for accommodating the first elastic member 232.

[0043] This invention achieves the functions of sealing protection and guiding and limiting the first elastic element 232 through the fixed shell 212 and the movable shell 213. When the movable shell 213 slides with the hinge seat 231, it maintains a sliding fit with the fixed shell 212, preventing seawater and sediment from directly contacting the first elastic element 232 and providing a stable path for the stretching and compression of the first elastic element 232, while maintaining the overall structural regularity of the buffer assembly 23. This achieves the effects of extending the service life of the first elastic element 232 and improving the operational stability of the buffer assembly 23: the sealed cavity isolates the first elastic element 232 from corrosive substances and impurities in the marine environment, reducing the performance degradation of the elastic element due to wear and corrosion; the sliding fit between the movable shell 213 and the fixed shell 212 provides precise guidance for the deformation of the first elastic element 232, preventing the elastic element from shifting or twisting, ensuring that the buffer assembly 23 can always stably absorb impact energy, thereby ensuring the continuous and reliable buffering effect of the entire anti-scour device. When the seawater current impacts the protective cylinder 11, causing the outer plate 22 to move, the outer plate 22 pushes the hinge seat 231 to slide along the slide rail of the inner plate 21 via the connecting rod 233. The movement of the hinge seat 231 causes the movable shell 213 to slide synchronously. The movable shell 213 maintains a sliding fit with the fixed shell 212 on the inner plate 21, and the enclosed cavity formed by the two encloses the first elastic element 232. When the hinge seat 231 slides closer to the fixed end of the inner plate 21, the first elastic element 232 is compressed, and the movable shell 213 slides into the fixed shell 212, reducing the cavity space. The fixed shell 212 restricts the first elastic element 232 from shifting laterally. When the hinge seat 231... When 231 slides away from the fixed end of the inner plate 21, the first elastic element 232 is stretched by the tensile force, and the movable shell 213 slides outward from the inside of the fixed shell 212, expanding the cavity space. The cooperation between the movable shell 213 and the fixed shell 212 still provides stable guidance for the first elastic element 232. Throughout the process, the closed cavity always isolates the contact between seawater, silt and the first elastic element 232, protecting the stability of the performance of the first elastic element 232. At the same time, the sliding cooperation between the movable shell 213 and the fixed shell 212 ensures that the first elastic element 232 deforms only in the set direction, ensuring that the buffer assembly 23 efficiently absorbs the impact energy and reduces the transmission of the impact force to the base 1.

[0044] Reference Figure 3 , Figures 7-9 The first transmission assembly 41 includes a first end seat 411, a first upright rod 412, and a first connecting frame 413. The first end seat 411 is located at the bottom of the movable float 12. The two ends of the first upright rod 412 are respectively connected to the first end seat 411 and the first connecting frame 413. There are two hinge seats 231 on each inner plate 21, and the two hinge seats 231 are located on both sides of the inner rod 211. When the buffer assembly 23 is stretched, the two hinge seats 231 slide away from the inner rod 211. When the upper hinge seat 231 moves upward, it drives the first connecting frame 413 to move upward.

[0045] The present invention, through the cooperation of the first end seat 411, the first upright 412 and the first connecting frame 413, converts the sliding displacement of the two hinge seats 231 into the upward moving force of the movable float 12, ensuring that the buffer assembly 23 can stably trigger the stabilizing effect of the movable float 12 when stretched. The hinge seat 231 is provided with a push block 2311 for pushing the first connecting frame 413. When the seawater current impacts the protective cylinder 11 and stretches the buffer assembly 23, the two hinge seats 231 on the inner plate 21 slide rail will slide synchronously away from the inner rod 211. The upper hinge seat 231 will move upward during the sliding process, and then push the first connecting frame 413 that it cooperates with to move upward through the push block 2311. When the first connecting frame 413 moves upward, it will drive the first upright 412 to move upward synchronously. The other end of the first upright 412 is connected to the first end seat 411 at the bottom of the movable float 12. Therefore, the first upright 412 will drive the movable float 12 to move upward through the first end seat 411. After the movable float 12 moves upward, it uses its own weight to generate a stabilizing torque to suppress the shaking of the base 1 caused by the impact.

[0046] Reference Figure 3 , Figures 7-9 The second transmission assembly 42 includes a mounting ring 421, a second end seat 422, a second connecting frame 423, a telescopic rod 424, and a third elastic element 425. The mounting ring 421 is fixedly sleeved on the movable float 12. The second end seat 422 is disposed on the mounting ring 421. The second connecting frame 423 is connected to the second end seat 422. The two ends of the telescopic rod 424 are respectively connected to the base 1 and the second end seat 422. The third elastic element 425 is sleeved on the telescopic rod 424.

[0047] The present invention transmits power through the fixed connection between the mounting ring 421 and the movable float 12, and the cooperation between the second end seat 422 and the second connecting frame 423. At the same time, it utilizes the telescopic guide of the telescopic rod 424 and the deformation buffer of the third elastic element 425 to ensure that the buffer assembly 23 can smoothly drive the movable float 12 to move upward when it is under pressure, and reduces the rigid impact during the transmission process. When the seawater current impacts the protective cylinder 11 and puts pressure on the buffer assembly 23, the pressure of the buffer assembly 23 will act on the second connecting frame 423. The second connecting frame 423 is connected to the second end seat 422, thus causing the second end seat 422 to move. The second end seat 422 is fixed to the movable float 12 by the mounting ring 421 and is connected to one end of the telescopic rod 424. The other end of the telescopic rod 424 is fixed to the base 1. Therefore, the second end seat 422 will cause the movable float 12 to move upward, and the telescopic rod 424 will be stretched accordingly. When the telescopic rod 424 is stretched, the third elastic element 425 sleeved on it is stretched synchronously, absorbing the impact force during the transmission process through its own deformation. After the movable float 12 moves upward, it uses its own weight to suppress the shaking of the base 1, achieving a stabilizing effect. When the impact weakens and the pressure of the buffer assembly 23 decreases, the third elastic element 425 will pull the telescopic rod 424 to contract through its own restoring force, thereby causing the second end seat 422 and the movable float 12 to slowly return to their original positions.

[0048] Reference Figure 3 and Figure 4 The base 1 is provided with a second upright 13 and a fixed float 14; the fixed float 14 is connected to the base 1 through the second upright 13 and is located below the base 1.

[0049] This invention achieves bottom gravity stability and position anchoring of the base 1 through the cooperation of the second upright 13 and the fixed float 14. These functions enhance the basic stability of the base 1 and reduce the risk of the entire device tipping over due to current impacts: the fixed float 14 consistently provides downward gravity support to the base 1, working in synergy with the dynamic stabilization function of the upper movable float 12 to prevent insufficient stability caused by the base 1 relying solely on its own weight; the second upright 13 ensures a secure connection between the fixed float 14 and the base 1, preventing the fixed float 14 from shifting or falling off, and continuously providing stable gravity anchoring for the base 1, further enhancing the device's impact resistance in complex marine environments. Because the base 1 needs to bear the weight of the main body of the wind turbine equipment and together with the fixed float 14 used for gravity anchoring, it constitutes the main weight carrier of the device. The movable float 12 is a lightweight buoyancy adjustment component, and its weight is much less than the total weight of the base 1 and the fixed float 14. Therefore, the downward shift of the center of gravity caused by the overall downward movement of the device is necessarily greater than the upward shift of the center of gravity caused by the upward movement of the movable float 12. This device solves the technical problem of traditional wind turbine foundation anti-scour devices that rely only on the top or middle stabilizing structure and lack active gravity support at the bottom, making the base 1 prone to tilting or displacement due to the impact of undercurrents. Traditional devices often lack additional stabilizing components at the bottom and rely solely on the weight of the base 1 itself to resist impacts, making them prone to losing balance under strong undercurrents. This device, however, adds bottom stabilizing support to the base 1 through the gravity anchoring of the fixed float 14 at the bottom, forming a comprehensive stabilization system.

[0050] Reference Figure 10 The base 1 is provided with a vertical plate 15 for guiding the lifting and lowering of the first connecting frame 413 and the second connecting frame 423.

[0051] The present invention realizes the function of guiding the first connecting frame 413 and the second connecting frame 423 to rise and fall through the upright plate 15, so that the hinge seat 231 can push the first connecting frame 413 and the second connecting frame 423 to move more stably during the sliding process, thereby stably driving the movable float 12 to rise and fall.

[0052] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A scour protection device for offshore wind turbine foundations, characterized in that, It includes a base (1), a buffer mechanism (2), and a lifting mechanism (3); The base (1) is fitted with a protective sleeve (11) on its outer periphery, and the base (1) is provided with a movable float (12) that can be raised and lowered. The protective cylinder (11) is connected to the base (1) through the buffer mechanism (2); The lifting mechanism (3) is mounted on the base (1) and is used to control the lifting of the movable float (12); The buffer mechanism (2) shall have at least three sets, and the multiple sets of buffer mechanisms (2) shall be evenly distributed around the protective cylinder (11); The buffer mechanism (2) includes an inner plate (21), an outer plate (22), and a buffer assembly (23); The inner plate (21) is connected to the base (1), and the outer plate (22) is connected to the inner wall of the protective cylinder (11); An inner rod (211) is provided on the inner plate (21), and an outer rod (221) is connected to the outer plate (22). The outer rod (221) and the inner rod (211) are in sliding fit. The inner plate (21) is connected to the outer plate (22) via a buffer assembly (23); The lifting mechanism (3) includes a support plate (31) and an adjusting plate (32). The support plate (31) is connected to the movable float (12), and a second elastic element (311) is provided on the support plate (31). The two ends of the second elastic element (311) are connected to the support plate (31) and the adjusting plate (32) respectively, and the second elastic element (311) is located on the side away from the movable float (12). The base (1) is provided with a transmission mechanism (4). When the buffer assembly (23) is compressed, the power is transmitted through the transmission mechanism (4) to drive the movable float (12) to move upward. The transmission mechanism (4) includes a second transmission component (42) and a first transmission component (41). Both the second transmission assembly (42) and the first transmission assembly (41) are connected to the movable float (12) in a transmission connection. When the buffer assembly (23) contracts under pressure, the movable float (12) is driven to move upward through the first transmission assembly (41); when the buffer assembly (23) is stretched under tension, the movable float (12) is driven to move upward through the second transmission assembly (42).

2. The anti-scouring device for offshore wind turbine foundations according to claim 1, characterized in that, The buffer assembly (23) includes a hinge seat (231), a first elastic element (232), and a connecting rod (233); A slide rail is provided on the inner plate (21), and the hinge seat (231) is slidably installed on the slide rail; The two ends of the first elastic element (232) are connected to the hinge seat (231) and the inner plate (21) respectively; One end of the connecting rod (233) is hinged to the outer plate (22), and the other end of the connecting rod (233) is hinged to the hinge seat (231).

3. The anti-scouring device for offshore wind power foundations according to claim 2, characterized in that, A movable shell (213) is connected to the hinge base (231); The inner plate (21) is provided with a fixed shell (212), and the movable shell (213) slides with the fixed shell (212) to form a cavity for accommodating the first elastic element (232).

4. The anti-scouring device for offshore wind power foundations according to claim 1, characterized in that, The first transmission assembly (41) includes a first end seat (411), a first upright (412), and a first connecting frame (413). The first end seat (411) is located at the bottom of the movable float (12); The two ends of the first upright (412) are connected to the first end seat (411) and the first connecting frame (413) respectively; There are two hinge seats (231) on each inner plate (21), and the two hinge seats (231) are located on both sides of the inner rod (211). When the buffer assembly (23) is stretched, the two hinge seats (231) slide away from the inner rod (211). When the upper hinge seat (231) moves upward, it drives the first connecting frame (413) to move upward.

5. The anti-scouring device for offshore wind power foundations according to claim 4, characterized in that, The second transmission assembly (42) includes a mounting ring (421), a second end seat (422), a second connecting frame (423), a telescopic rod (424), and a third elastic element (425). The mounting ring (421) is fixedly sleeved on the movable float (12); The second end seat (422) is mounted on the mounting ring (421); The second connecting bracket (423) is connected to the second end seat (422); The two ends of the telescopic rod (424) are connected to the base (1) and the second end seat (422) respectively; The third elastic element (425) is sleeved on the telescopic rod (424).

6. The anti-scouring device for offshore wind power foundations according to claim 1, characterized in that, The base (1) is provided with a second upright (13) and a fixed float (14); The fixed float (14) is connected to the base (1) via the second upright (13), and the fixed float (14) is located below the base (1).

7. The anti-scouring device for offshore wind power foundations according to claim 5, characterized in that, The base (1) is provided with a vertical plate (15) for guiding the lifting and lowering of the first connecting frame (413) and the second connecting frame (423).

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