Offshore wind power anti-scouring device

Abstract

The invention relates to the technical field of offshore wind power engineering, in particular to an offshore wind power anti-scouring device which comprises a sea wind pile foundation, an anti-scouring cover, an energy storage assembly and a water spraying assembly. The energy storage assembly is arranged on the anti-scouring cover and used for converting water flow energy into electric energy, the water spraying assembly is connected with the energy storage assembly, and the water spraying assembly sprays water in the water flow direction; mechanical energy of tidal currents and waves around the sea wind pile foundation is converted into electric energy, then the electric energy is converted into water flow opposite to the tidal currents and the waves for energy dissipation, the design is ingenious, and the engineering feasibility is high.

Description

Technical Field

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

[0002] Offshore wind power refers to the technology of harnessing wind power in the marine environment. Wind turbines are installed offshore or offshore to convert wind energy into electricity. Compared to onshore wind power, offshore wind power offers advantages such as abundant wind resources, stable wind speeds, and the lack of land occupation. It has become a key direction for global clean energy development. However, offshore wind power facilities are exposed to complex marine environments for extended periods. Seawater movements (including tides, waves, and currents) continuously scour the seabed around the turbine foundations, causing sediment loss and the formation of scour pits. The impact of waves and tidal currents on the pile foundations creates horseshoe-shaped vortices on the upstream side of the pile foundation and vortex shedding on the downstream side. Excessive scour depth can expose the foundation structure, reduce its bearing capacity, and potentially cause the turbine to tilt or even collapse. Furthermore, the harsh offshore environment and extremely high maintenance costs make anti-scour measures directly impact the lifespan of the turbine, operational safety, and project economics. Existing offshore wind power foundation anti-scour technologies mainly use methods such as stone riprap and concrete protective pads to physically cover or reinforce the seabed to resist scour. Although they can stabilize the foundation in the short term, they have problems such as large material consumption, high construction and maintenance costs, and obvious ecological disturbance.

[0003] The Chinese authorized invention patent "An offshore wind turbine pile foundation with an anti-scour structure" (application number: 202410844367.5) proposes an offshore wind turbine pile foundation consisting of a wind turbine single pile foundation, an anti-scour cone cover, a conveying cylinder, a connecting sleeve, a collecting cylinder, etc. The anti-scour cone cover and stones can protect the wind turbine single pile foundation, and at the same time, can collect sand and gravel carried by ocean movement. The collected sand and gravel are transported to the interior of the anti-scour cone cover to fill the formed scour pits, prevent the scour pits from getting bigger, and achieve a good anti-scour effect. However, the core idea of ​​this technical solution is still passive protection and one-way protection. It only delays the scouring process by dissipating water flow energy, and cannot actively offset the scouring mechanical energy. It also lacks the reuse of tidal and wave energy, and is not economical and sustainable, and has certain limitations. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an offshore wind power anti-scour device which can convert and reuse the mechanical energy of tides and waves and realize closed-loop active energy dissipation by utilizing water flow energy conversion.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an offshore wind power anti-scour device, including a sea breeze pile foundation, an anti-scour cover, an energy storage component and a water spray component, the anti-scour cover is arranged around the sea breeze pile foundation; the energy storage component is arranged on the anti-scour cover for converting water flow energy into electrical energy, the water spray component is connected to the energy storage component, and the water spray component sprays water in the direction of the water flow.

[0006] The beneficial effects of this invention are: by converting the mechanical energy of the tides and waves around the sea breeze pile foundation into electrical energy, and then converting the electrical energy into water flow in the opposite direction of the tides and waves for energy dissipation, the design is ingenious and has strong engineering feasibility; by converting the mechanical energy carried by the movement of waves and tides into electrical energy, the dual goals of energy recovery and active protection are achieved. Compared with purely consumable solutions such as riprap, this design significantly reduces operation and maintenance costs and gives the system self-powered characteristics; the design of the anti-scour cover reduces the physical coverage area of ​​the seabed landform, avoiding the interference of large-scale riprap or concrete construction on the marine ecology. At the same time, the energy recovery mechanism reduces dependence on external energy, conforming to the current trend of green development and environmental protection, and further improving ecological compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic structural diagram of an offshore wind power anti-scour device according to a specific embodiment of the present invention; Figure 2 This is a schematic structural diagram of a power generation device for an offshore wind power anti-scour device according to a specific embodiment of the present invention; Figure 3 A cross-sectional view of an offshore wind power anti-scour device according to a specific embodiment of the present invention; Description of labels: 1. Sea breeze pile foundation; 2. Acoustic Doppler current meter; 3. Pumping device; 4. Micro servo motor; 5. Flow rate regulating valve; 6. Nozzle; 7. Water storage tank; 8. Energy storage device; 9. Power generating sleeve; 10. Force transmission rod; 11. Support plate; 12. Water retaining plate; 13. Energy dissipation block; 14. Chute; 15. Anti-scour cover; 16. Limiter; 17. Pulley; 18. First water level gauge; 19. Second water level gauge; 20. Gravel; 21. Induction coil; 22. Waterproof rubber sleeve; 23. Permanent magnet. DETAILED DESCRIPTION

[0008] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0009] Please refer to Figures 1 to 3An offshore wind power anti-scour device includes a sea breeze pile foundation 1, an anti-scour cover 15, an energy storage component and a water spray component. The anti-scour cover 15 is arranged around the sea breeze pile foundation 1; the energy storage component is arranged on the anti-scour cover 15 for converting water flow energy into electrical energy. The water spray component is connected to the energy storage component, and the water spray component sprays water in the direction of the water flow.

[0010] As can be seen from the above description, the beneficial effects of the present invention are: by converting the mechanical energy of the tides and waves around the sea breeze pile foundation 1 into electrical energy, and then converting the electrical energy into water flow in the opposite direction of the tides and waves for energy dissipation, the design is ingenious and has strong engineering feasibility; by converting the mechanical energy carried by the waves and tidal movement into electrical energy, the dual goals of energy recovery and active protection are achieved. Compared with pure consumable solutions such as riprap, this design significantly reduces operation and maintenance costs and gives the system self-powered characteristics; the design of the anti-scour cover 15 reduces the physical coverage area of ​​the seabed landform, avoiding the interference of large-scale riprap or concrete construction on the marine ecology. At the same time, the energy recovery mechanism reduces dependence on external energy, conforming to the current trend of green development and environmental protection, and further improving ecological compatibility.

[0011] Furthermore, the energy storage component includes a power generation device, which includes a power generation sleeve 8, a force transmission rod 10 and a slide 14. The anti-scour cover 15 is provided with a slide 14, and the length direction of the slide 14 extends away from the sea breeze pile foundation 1. The power generation sleeve 8 is arranged at one end of the slide 14, and an induction coil 21 is provided in the power generation sleeve 8. The force transmission rod 10 is movably set on the slide 14, and a permanent magnet 23 is provided at one end thereof and is movably connected to the power generation sleeve 8.

[0012] As can be seen from the above description, the water flow energy of the tide and waves drives the force transmission rod 10 to move along the slide 14, and the permanent magnet 23 at one end thereof moves in the power generating sleeve 8 to cooperate with the induction coil 21 to generate electrical energy, and then uses this electrical energy to drive the water spray assembly to spray water in the direction of the water flow to dissipate energy.

[0013] Furthermore, the energy storage component further includes an energy storage device 8, which is connected to the power generation device, and is used to convert the electric energy generated by the power generation device into electric energy with a voltage and frequency suitable for energy storage.

[0014] As can be seen from the above description, the electrical energy generated by the power generation equipment is converted and stored by the energy storage device 8 to be supplied to the water spray assembly.

[0015] Furthermore, the water spray assembly includes a water tank 7 , a pumping device and a nozzle 6 . The water tank 7 is provided with the nozzle 6 . The pumping device is connected to the nozzle 6 to pump the water inside the water tank 7 to the nozzle 6 .

[0016] As can be seen from the above description, the water in the water tank 7 is pumped out from the nozzle 6 by the pumping device to form a reverse water flow to offset the energy of the tide and waves.

[0017] Furthermore, the water spray assembly also includes a pumping device 3, a first water level gauge 18 and a second water level gauge 19. The pumping device 3 is used to pump external seawater into the water tank 7. The first water level gauge 18 and the second water level gauge 19 are arranged in the water tank 7 and are spaced apart along the height direction of the water tank 7; the first water level gauge 18, the second water level gauge 19 and the pumping device 3 are electrically connected.

[0018] As can be seen from the above description, the design of the first water level gauge 18 and the second water level gauge 19 enables detection of the water level in the water tank 7 and, in conjunction with the pumping device 3, replenishment of the water tank 7 with seawater. The first water level gauge 18 serves as the minimum water level. When the water level in the water tank 7 falls below the first water level gauge 18, the pumping device 3 draws in external seawater to replenish the water in the water tank 7 until the water level reaches the level of the second water level gauge 19, at which point the pumping device 3 shuts off.

[0019] Furthermore, the water spray assembly also includes an acoustic Doppler flowmeter 2, a flow rate regulating valve 5 and a micro servo motor 4. The water tank 7 is provided with an acoustic Doppler flowmeter 2, a flow rate regulating valve 5 and a micro servo motor 4. The acoustic Doppler flowmeter 2 is electrically connected to the micro servo motor 4 and the flow rate regulating valve 5. The micro servo motor 4 is transmission-connected to the nozzle 6 and drives it to change the spraying direction. The flow rate regulating valve 5 is connected to the nozzle 6 to adjust the water spraying flow rate of the nozzle 6.

[0020] From the above description, it can be seen that the direction and velocity of waves and tides are monitored in real time by the acoustic Doppler current meter 2, and then fed back to the micro servo motor 4 and the flow rate regulating valve 5 to adjust the spray direction and water flow rate of the nozzle 6 according to the direction and size of the waves and tides, so as to more efficiently utilize the impact between the water flows to play the role of energy dissipation and protection, and ultimately slow down the erosion of the seabed around the sea breeze pile foundation 1 by waves and tides.

[0021] Furthermore, a water baffle 12 is provided at one end of the force transmission rod 10 away from the power generation sleeve 8 .

[0022] As can be seen from the above description, the water retaining plate 12 is used to increase the force-bearing area of ​​the force transmission rod 10, so as to improve the conversion of the mechanical energy of the tide and waves.

[0023] Furthermore, the water baffle 12 is semicircular.

[0024] As can be seen from the above description, the provision of the semicircular water baffle 12 can expand the contact area between the water baffle 12 and waves and tidal currents without affecting the normal operation of the force transmission rod 10.

[0025] Furthermore, it also includes energy dissipation blocks 13 , and a plurality of energy dissipation blocks 13 are provided. The energy dissipation blocks 13 are provided on the anti-scour cover 15 and are spaced apart along the length direction of the chute 14 .

[0026] It can be seen from the above description that the energy dissipation blocks 13 are used to weaken the water flow energy of waves and tidal currents.

[0027] Furthermore, the water-facing surface of the energy dissipation block 13 is a concave arc surface.

[0028] From the above description, it can be seen that the concave arc surface design of the water-facing surface of the energy dissipation block 13 is adopted. After some waves and tides at low positions pass through the arc surface of the energy dissipation block 13, they can change their running direction, collide with waves and tides at medium and low positions, and dissipate energy, thereby playing the role of first energy dissipation and protection, and at the same time changing the flow direction of some waves and tides to better act on the water retaining plate 12.

[0029] Please refer to Figures 1 to 3 , embodiment 1 of the present invention is: An offshore wind power anti-scour device comprises a sea breeze pile foundation 1, an anti-scour cover 15, an energy storage component and a water spray component.

[0030] The anti-scour cover 15 is disposed around the sea breeze pile foundation 1; gravel 20 is filled between the anti-scour cover 15 and the sea breeze pile foundation 1. The anti-scour cover 15 includes an inclined portion and a horizontal portion. The energy storage assembly and the water spray assembly are both disposed on the inclined portion. The energy storage assembly is disposed on the anti-scour cover 15 and is used to convert water flow energy into electrical energy. The water spray assembly is connected to the energy storage assembly and sprays water in the direction of the water flow.

[0031] Specifically, the energy storage assembly includes a power generation device and an energy storage device 8. The power generation device includes a power generation sleeve 8, a force transmission rod 10, a chute 14, and a sliding device. The chute 14 is provided on the inclined portion of the anti-scour cover 15. The length direction of the chute 14 extends away from the sea breeze pile foundation 1. The power generation sleeve 8 is provided at one end of the chute 14. An induction coil 21 is provided in the power generation sleeve 8. The sliding device includes a support plate 11 and a pulley 17. The force transmission rod 10 is connected to the support plate 11. Pulleys 17 are provided on both sides of the support plate 11. The pulleys 17 are movably matched with the chute 14. A permanent magnet 23 is provided at one end of the force transmission rod 10 and is movably connected to the power generation sleeve 8. A limiter 16 is provided at the end of the chute 14 away from the sea breeze pile foundation 1. The limiter 16 is opposite to the support plate 11 in the length direction of the chute 14 and can limit the movement of the force transmission rod 10 and the support plate 11. A semicircular water baffle 12 is provided at one end of the force transmission rod 10 away from the power generation sleeve 8. When waves and tides come, the force transmission rod 10 is subjected to force through the water baffle 12 to move the force transmission rod 10, and the magnetic flux lines of the permanent magnet 23 and the induction coil 21 are cut to generate electrical energy. After the waves and tides hit the waterproof scour cover, they will retreat. At this time, under the inclined guidance of the inclined part of the anti-scour cover 15 and the retreat of waves and tides, the magnetic flux lines of the permanent magnet 23 and the induction coil 21 are cut again to generate electrical energy.

[0032] Specifically, a highly ductile waterproof rubber sleeve 22 is provided at the portion where the force transmission rod 10 is connected to the power generation sleeve 8 . The waterproof rubber sleeve 22 in this embodiment is made of thermoplastic polyurethane elastomer (TPU).

[0033] A plurality of energy dissipation blocks 13 are provided on the horizontal portion of the anti-scour shield 15, spaced along the length of the chute 14. The water-facing surfaces of the energy dissipation blocks 13 are concave arc surfaces. After passing through the arc surfaces of the energy dissipation blocks 13, some low-lying waves and tidal currents can change direction and collide with and dissipate energy from those in the middle and low positions, achieving a primary energy dissipation and protection effect. At the same time, the flow direction of some waves and tidal currents is changed to better act on the water retaining plate 12.

[0034] The energy storage device 8 is connected to the power generation device and is used to convert the electrical energy generated by the power generation device into electrical energy with a voltage and frequency suitable for energy storage. The energy storage device 8 converts the original electrical energy generated by the induction coil 21 into a voltage and frequency suitable for energy storage via a converter, which is a conventional configuration in the art.

[0035] The water spray assembly includes a water tank 7, a pumping device, a nozzle 6, a pumping device 3, a first water level meter 18, a second water level meter 19, an acoustic Doppler flow meter 2, a flow rate regulating valve 5, a micro servo motor 4 and a built-in control computer.

[0036] The water tank 7 is provided with a nozzle 6. The pumping device is connected to the nozzle 6 to pump water from the tank 7 to the nozzle 6. The pumping device 3 is used to pump seawater from the outside into the tank 7. The first and second water level gauges 18, 19 are located within the tank 7 and spaced apart along the height of the tank 7. The first and second water level gauges 18, 19 are electrically connected to the pumping device 3. The tank 7 is provided with an acoustic Doppler flowmeter 2, a flow rate regulating valve 5, and a micro-servo motor 4. The built-in control computer is electrically connected to the pumping device, the pumping device 3, the first and second water level gauges 18, 19, the acoustic Doppler flowmeter 2, the flow rate regulating valve 5, and the micro-servo motor 4. The micro-servo motor 4 is in driving connection with the nozzle 6 to drive it to change its spray direction. The flow rate regulating valve 5 is connected to the nozzle 6 to adjust the spray rate of the nozzle 6.

[0037] Working principle: After the device is operating normally, the waves and tides in the seawater carry huge mechanical energy and attack the sea breeze foundation. After passing through the arc surface of the energy dissipation block 13, some waves and tides at low positions change their running direction, collide with the waves and tides at medium and low positions, and dissipate energy, playing the role of first energy dissipation and protection, and at the same time changing the flow direction of some waves and tides to better act on the water retaining plate 12. The water retaining plate 12 is connected to the force transmission rod 10. Driven by the mechanical energy of waves and tides, with the help of the support plate 11, the pulley 17 and the slide 14 fixed on the inclined part of the anti-scour cover 15, the permanent magnet 23 at the other end of the force transmission rod 10 is driven to cut the magnetic flux lines back and forth in the power generation sleeve 8. According to the law of electromagnetic induction, current is generated in the induction coil 21, that is, the mechanical energy of waves and tides is converted into electrical energy. The generated electrical energy will be stored in the energy storage device 8. When the first water level gauge 18 in the water tank 7 detects that the water level in the tank is insufficient and the energy storage device 8 has sufficient power, the pumping device 3 will be activated. When the second water level gauge 19 in the water tank 7 detects that the water level is sufficient, the pumping device 3 will stop. The acoustic Doppler current meter 2 on the top of the water tank 7 will monitor the direction and speed of waves and tides in real time and transmit the relevant data to the built-in control computer. When the energy storage device 8 has sufficient power and detects that waves and tides are approaching, the control computer will respectively activate the micro servo motor 4, flow rate regulating valve 5 and nozzle 6. According to the direction and size of the waves and tides, water flows at corresponding speeds and in opposite directions will be ejected. The collision between the water flows will play an energy dissipation and protection role, and ultimately slow down the erosion of the seabed around the sea breeze pile foundation 1 by waves and tides.

[0038] In summary, the offshore wind power anti-scour device provided by the present invention converts the mechanical energy of the tides and waves around the wind pile foundation into electrical energy, and then converts the electrical energy into water flow in the opposite direction of the tides and waves for energy dissipation. The design is ingenious and has strong engineering feasibility. By converting the mechanical energy carried by the waves and tidal movements into electrical energy, the dual goals of energy recovery and active protection are achieved. Compared with pure consumable solutions such as riprap, this design significantly reduces operation and maintenance costs and gives the system self-powered characteristics. The design of the anti-scour cover reduces the physical coverage area of ​​the seabed landform, avoiding the interference of large-scale riprap or concrete construction on the marine ecology. At the same time, the energy recovery mechanism reduces dependence on external energy, which is in line with the current trend of green development and environmental protection, and further enhances ecological compatibility.

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An offshore wind power anti-scour device, characterized in that: It includes a sea breeze pile foundation, an anti-scour cover, an energy storage component and a water spray component. The anti-scour cover is arranged around the sea breeze pile foundation; the energy storage component is arranged on the anti-scour cover to convert water flow energy into electrical energy, the water spray component is connected to the energy storage component, and the water spray component sprays water in the direction of the water flow.

2. The offshore wind power anti-scour device according to claim 1, characterized in that: The energy storage assembly includes a power generation device, which includes a power generation sleeve, a force transmission rod and a slide. The anti-scour cover is provided with a slide, and the length direction of the slide extends away from the sea breeze pile foundation. The power generation sleeve is provided at one end of the slide, and an induction coil is provided in the power generation sleeve. The force transmission rod is movably provided on the slide, and a permanent magnet is provided at one end of the force transmission rod and is movably connected to the power generation sleeve.

3. The offshore wind power anti-scour device according to claim 2, characterized in that: The energy storage component further includes an energy storage device, which is connected to the power generation device and is used to convert the electric energy generated by the power generation device into electric energy with a voltage and frequency suitable for energy storage.

4. The offshore wind power anti-scour device according to claim 1, characterized in that: The water spray assembly includes a water tank, a pumping device and a spray head. The water tank is provided with a spray head. The pumping device is connected to the spray head to pump water inside the water tank to the spray head.

5. The offshore wind power anti-scour device according to claim 4, characterized in that: The water spray assembly also includes a pumping device, a first water level gauge and a second water level gauge. The pumping device is used to pump external seawater into a water tank. The first water level gauge and the second water level gauge are arranged in the water tank and are spaced apart along the height direction of the water tank. The first water level gauge, the second water level gauge and the pumping device are electrically connected.

6. The offshore wind power anti-scour device according to claim 4, characterized in that: The water spray assembly also includes an acoustic Doppler flowmeter, a flow rate regulating valve and a micro servo motor. The water tank is provided with an acoustic Doppler flowmeter, a flow rate regulating valve and a micro servo motor. The acoustic Doppler flowmeter is electrically connected to the micro servo motor and the flow rate regulating valve. The micro servo motor is connected to the nozzle transmission and drives it to change the spray direction. The flow rate regulating valve is connected to the nozzle to adjust the water spraying flow rate of the nozzle.

7. The offshore wind power anti-scour device according to claim 2, characterized in that: A water baffle is provided on one end of the force transmission rod away from the power generation sleeve.

8. The offshore wind power anti-scour device according to claim 7, characterized in that: The water retaining plate is semicircular.

9. The offshore wind power anti-scour device according to claim 7, characterized in that: It also includes energy dissipation blocks, a plurality of which are provided. The energy dissipation blocks are arranged on the anti-scour cover and spaced apart along the length direction of the chute.

10. The offshore wind power anti-scour device according to claim 9, characterized in that: The water-facing surface of the energy dissipation block is an inwardly concave arc surface.

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