Offshore wind power anti-scour damping device based on pile-cultured mussel multi-stage turbulent flow

Abstract

The invention provides an offshore wind power anti-scour damping device based on pile-cultured mussel multi-stage turbulent flow, and belongs to the technical field of offshore wind power engineering.The offshore wind power anti-scour damping device based on pile-cultured mussel multi-stage turbulent flow is fixed to a pile foundation in the sea, and a pile winding platform is arranged at the top of the pile foundation; the specific structure of the offshore wind power anti-scour damping device comprises a motor assembly, a seedling feeding and harvesting assembly, a breeding and turbulent flow assembly and a base assembly. The motor assembly is located in the pile winding platform and a wind power tower in the pile foundation. The seedling discharging and harvesting assembly is suspended below the pile winding platform through a cable; the breeding and turbulent flow assembly is located below the free surface of seawater at the position where the pile foundation is located, and the bottom of the breeding and turbulent flow assembly is connected with the base assembly to form a breeding area; the problem that an existing device cannot achieve the synergistic effect of scour protection, vibration weakening and eco-friendliness at the same time can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of offshore wind power engineering, and in particular, relates to an offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels and multi-stage disturbance. Background Art

[0002] With the proposal of the "dual carbon" goal and the implementation of the marine power strategy, the development and utilization of marine renewable energy has developed rapidly. Among them, the offshore wind power industry has developed rapidly and the technology has gradually matured. The offshore wind power foundation is the part that supports the wind turbines, accounting for about one-third of the cost of offshore wind power projects. Different forms of foundations will be used for different water depths and geological conditions, including single pile foundations, jacket foundations, suction cylinder foundations and floating foundations. Among them, single pile foundations are widely used in major wind farms due to their low cost and simple construction.

[0003] After the single pile foundation is installed in the sea, the original seawater flow will be changed. Under the influence of the interaction between waves, currents and the single pile structure, a downward current will be generated in front of the pile, a horseshoe-shaped vortex will appear around the pile near the bed surface, and a tail vortex will appear behind the pile and the vortex will diffuse and dissipate. This will cause the seabed around the pile to be scoured. The appearance of the scour pit will expose the part of the pile that should be buried under the bed surface to the seawater, which will weaken the maximum bearing capacity of the pile foundation on the one hand and increase the overall hydrodynamic load on the other hand. This will make the pile foundation prone to overturning and cause the wind turbine to fail. In addition, under the action of the ocean current, the generation and development of the vortex street behind the pile will also cause the vibration of the pile foundation. Under the influence of scouring, the vibration of the pile foundation will be more intense, which may also cause resonance and instability of the structure, thereby reducing the efficiency or failure of offshore wind power facilities. Pile foundation vibration will also cause liquefaction of the soil around the pile, aggravating the scouring around the pile.

[0004] At present, the pile foundation scour protection methods are divided into three types according to their protection principles: active protection, passive protection and combined protection. Active protection is to achieve scour protection by reducing the hydrodynamic force around the pile. Passive protection is to achieve scour protection by enhancing the anti-scour capacity of the bed surface. Combined protection is to combine multiple protection methods and complement each other's shortcomings to achieve protection. However, the existing methods still have problems such as lack of eco-friendliness, short protection validity period and high construction and maintenance costs. For example, riprap protection will cause riprap settlement and displacement problems, and riprap needs to be replenished regularly. For the sake of resource conservation and eco-friendliness, some literature points out that offshore wind power can be combined with marine aquaculture, and scour protection can be achieved through marine aquaculture facilities.

[0005] The existing methods of mussel farming based on offshore wind power are mainly suspended farming and layered bottom farming in farming boxes. These two methods have limited disturbance to the water flow and require a large sea area, which will cause a large water blocking effect. Overly large and wide farming cages will also increase the mass of the upper part of the pile. These problems will cause the existing offshore wind power single pile foundation scour protection method combined with seawater aquaculture to increase the vibration amplitude of the pile foundation. On the one hand, while protecting against scour and seawater aquaculture, the vibration of the pile foundation is increased. On the other hand, it promotes the liquefaction of the soil around the pile caused by the vibration of the pile foundation, which in turn promotes scour, reducing the effect of scour protection.

[0006] A Chinese patent with application number 202021460932.1 (publication number CN213062081U) discloses an offshore wind power anti-scour device combined with offshore aquaculture. The invention sets a clamp outside the offshore wind power pile foundation to cooperate with the installation of a corrosion-resistant aquaculture net. The aquaculture net is used to cultivate strip marine economic crops, and the lower end of the aquaculture net is provided with a heavy ballast for anchoring. Cultivating strip marine economic crops through aquaculture nets can disrupt ocean currents and settle silt, thereby playing an anti-scour protection role. However, the narrow upper and wide lower structural form and the suspended kelp cultivation method will increase the water-blocking area and hydrodynamic load of the overall structure, thereby exacerbating the vibration of the pile foundation. In addition, anchoring itself has the risk of scour, and the suspended aquaculture method is not conducive to the protection of crops, and is easily eroded by marine animals and damaged by marine disasters.

[0007] A Chinese patent with application number 202111089021.1 (publication number CN113718841B) discloses an offshore wind power anti-scour device, which arranges sleeves and energy dissipation parts outside the offshore wind power pile foundation, and uses through holes on the energy dissipation parts and sleeves to provide flow disturbance and scour protection. However, the energy dissipation parts will be destroyed during the energy dissipation process, thereby increasing the cost of its construction and maintenance, and the support of the device mainly relies on the anti-sinking plate under the sleeve structure. The bottom of the anti-sinking plate itself will have scouring problems, which can easily cause the entire device to sink and fail. The device still has room for improvement in terms of resource conservation and eco-friendliness.

[0008] In summary, the existing devices cannot achieve the synergistic effects of scour protection, vibration reduction and eco-friendliness. Summary of the invention

[0009] In view of this, the present invention provides an offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels with multi-stage disturbance, which can solve the problem that the existing devices cannot achieve the synergistic effects of scour protection, vibration reduction and eco-friendliness.

[0010] The present invention is achieved in that:

[0011] The present invention provides an offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels with multi-stage disturbance flow. The offshore wind power anti-scour and vibration reduction device is fixed on a pile foundation in the sea, and a pile-circling platform is arranged at the top position of the pile foundation. The pile-circling platform surrounds the four sides of the pile foundation and is welded and fixed to the pile foundation; wherein the offshore wind power anti-scour and vibration reduction device comprises a motor assembly, a seedling lowering and harvesting assembly, a breeding and disturbance flow assembly and a base assembly, wherein the motor assembly is located in the wind power tower inside the pile-circling platform and the pile foundation; the seedling lowering and harvesting assembly is suspended below the pile-circling platform through a cable, and its height is higher than the free surface of the seawater at the location of the pile foundation; the breeding and disturbance flow assembly is located below the free surface of the seawater at the location of the pile foundation, and its bottom is connected to the base assembly to form a breeding area; the base assembly is located below the breeding area, in contact with the seabed at the location of the pile foundation, and is used to support the breeding and disturbance flow assembly;

[0012] The base assembly is a reverse Tesla valve type spoiler base, which is used to use the energy of the water flow itself to weaken the water flow intensity so as to reduce the scouring and vibration of the pile foundation by seawater.

[0013] The technical effects of the offshore wind power anti-scour and vibration reduction device based on pile-cultured mussel multi-stage disturbance provided by the present invention are as follows: the pile foundation is the basic part of the offshore wind power device, which is mainly responsible for supporting the wind power tower and other equipment. Because it is fixed on the seabed, it provides the necessary stability to resist the influence of sea currents and wind.

[0014] Pile-Encircling Platform: The pile-encircling platform surrounds the pile foundation and is welded and fixed to provide additional support and stability. It provides a platform for other components to ensure the safety and stability of the equipment during offshore operations.

[0015] The motor assembly is located in the wind turbine tower inside the pile foundation. The motor assembly provides power support to drive the seedling and harvesting components and the breeding and disturbance components. Through the control of the motor, the breeding process and water flow disturbance can be accurately managed, improving the efficiency and response speed of the device.

[0016] The seedling and harvesting components are suspended by cables below the pile-wrapped platform. The height of the components is designed to be above the free surface of the seawater to ensure that they will not be impacted by the water flow. Its main function is to seed and harvest aquatic organisms such as mussels. Through effective operation, the breeding efficiency can be improved while reducing the disturbance to the water body.

[0017] The aquaculture and disturbance component is located below the free surface of the pile foundation seawater, and its bottom is connected to the base component to form a breeding area. This component is designed to provide a good growth environment and affect the state of the surrounding water flow through disturbance. Effective water flow disturbance can improve the nutrient cycle of the water body and provide the required environment for the growth of mussels.

[0018] The base assembly is a reverse Tesla valve spoiler base. Its main function is to use the energy of the water flow itself to weaken the intensity of the water flow. This design can effectively reduce the scouring force and vibration of seawater on the pile foundation, protect the structural stability of the pile foundation, and extend its service life. At the same time, the contact between the base and the seabed can provide additional support to ensure the stability of the entire system.

[0019] The device can effectively reduce the impact of seawater scouring and vibration on pile foundations, enhance the stability of the structure, and extend the service life of offshore wind power equipment. In addition, the coordination of the breeding and spoiler components and the seedling and harvesting components further enhances the functionality of the device, making it not only able to prevent scouring, but also achieve the purpose of ecological breeding and promote the sustainable use of marine resources.

[0020] On the basis of the above technical solution, the offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage spoiler of the present invention can also be improved as follows:

[0021] Among them, the breeding and spoiler components include a supporting frame, a net lowering device, an external protective net, a wooden base bed and an internal protective net. The supporting frame includes an external frame and an internal frame. The external frame surrounds the outside of the breeding area and is in the shape of a hollow cylinder. It is welded and fixed to the internal frame; the internal frame is wrapped around the pile foundation and is in the shape of a thin-walled cylinder. It is fixed to the pile foundation through a flange ring, which is used to support the breeding area and protect the pile foundation; the wooden base bed is wrapped around the outside of the internal frame and is fixed to the internal frame through bolts.

[0022] Furthermore, the net lowering device includes circular rings fixed at the top and bottom of the breeding and spoiler assembly, which are used to vertically drop and lay the internal protective net after the mussel seedlings are lowered.

[0023] Furthermore, the surface of the wooden base bed is provided with a spiral groove and a guide rail, a mussel seedling rope is wound on the spiral groove, the spiral groove is used to provide a fixed position and friction force for the mussel seedling rope, and the guide rail is used to provide mobile support for the seedling lowering and harvesting assembly; the mussel seedling rope is wound on the wooden base bed, and the mussel seedling is fixed on the mussel seedling rope by foot threads;

[0024] The internal protective net is wrapped around the outside of the mussel seedling rope to prevent the young mussel seedlings from being washed away by waves and currents; the external protective net is distributed inside the external frame to protect the mussel seedlings from being eaten by marine organisms and from falling off due to extreme sea conditions.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the cultivation and disturbance components can effectively form an environment suitable for the growth of mussels through the combination of the support frame and the wooden base bed, and at the same time, the intensity of the water flow is weakened by the disturbance, thereby reducing the scouring of the pile foundation. The setting of the internal protective net can effectively prevent the young mussels from being washed away by the waves in the early stage of growth, ensuring the success rate of growth.

[0026] The spiral groove design of the base provides fixation and friction for the mussel rope, which helps the mussels to attach and grow. The guide rail design allows the seed placement and harvesting components to slide on it, improving the flexibility and efficiency of the operation.

[0027] The outer net prevents foreign organisms from preying on mussel seedlings, while the inner net protects young mussels and reduces the impact of waves. The dual protection design effectively copes with the challenges of various marine organisms and extreme sea conditions.

[0028] Furthermore, the motor assembly includes a power supply assembly, a power assembly, an operating table and a mussel harvesting and exporting assembly; the power supply assembly includes a wind power device and a battery device, which are respectively connected in parallel with the power assembly, the wind power device supplies power to the power assembly through offshore wind power generation, and the power supply assembly supplies power through dual channels to ensure the stability of power supply to the power assembly; the operating table is arranged inside the wind power tower, connected to the mussel harvesting and exporting assembly through a cable, and is used to control the seedling lowering and harvesting assembly; the power assembly is connected to the seedling lowering and harvesting assembly through a cable, and is used to provide power for the movement of the seedling lowering and harvesting assembly.

[0029] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the motor assembly provides the necessary power to drive the movement of the seedling and harvesting assembly, the breeding and spoiler assembly, etc. The combination of wind power equipment and batteries ensures that the motor can operate stably under different environmental conditions, thereby ensuring the efficiency and reliability of the entire device.

[0030] Furthermore, the mussel harvesting and exporting assembly includes a fish suction pump, a middle loading platform and a duct belt. The bottom of the fish suction pump is connected to the lower seedling and harvesting assembly, and is used to suck the mussels harvested from the lower seedling and harvesting assembly to the transfer platform. One end of the duct belt is connected to the transfer platform, and the other end is connected to the transport ship, and is used to transport the mussels in the transfer platform to the transport ship.

[0031] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the design of the fish suction pump ensures that the harvested mussels can be quickly and effectively transported to the transfer station, thereby optimizing the entire harvesting process.

[0032] Furthermore, the seedling placement and harvesting assembly includes a harvesting device and a seedling placement device, the harvesting device is used to achieve seedling placement and recovery, and the seedling placement device is used to harvest mussels around the pile foundation; the harvesting device includes a moving part and a rope locking buckle, the moving part is arranged in the guide rail of the wooden base bed, and is used to slide in the guide rail of the wooden base bed; one end of the rope locking buckle is fixed to one side of the wooden base bed, and the other end locks the rope head of the mussel seedling rope, and is used to pull the mussel seedling rope to be wound and distributed on the wooden base bed under the drive of the moving part; the moving part is connected to the power assembly through a cable.

[0033] The beneficial effects of adopting the above-mentioned improved scheme are as follows: through the design of suspending the cable under the pile-surrounding platform, the seeding and harvesting process of mussel seedlings can be effectively controlled to avoid direct impact on the pile foundation. Through the cooperation of the moving part and the locking rope buckle, it is ensured that when harvesting mussels, precise operation can be performed to reduce interference with other organisms and the environment.

[0034] Furthermore, the seedling lowering equipment is suspended in a surrounding manner at the bottom of the pile-circling platform, and includes an internal spiral cutting harvesting head and an external bucket-lifting harvesting head. The internal spiral cutting harvesting head adopts a spiral cutting blade for cutting the internal protective net along the direction of the mussel seedling rope, and shoveling the mussel seedling rope away from the wooden base bed through a spiral shovel mouth; the external bucket-lifting harvesting head is a vertical blade for shoveling mature mussels away from the wooden base bed by pulling upwards, and lifting the mussels to the bottom of the pile-circling platform through a semi-enclosed bucket-lifting structure; the internal spiral cutting harvesting head and the external bucket-lifting harvesting head are both electrically connected to the power assembly.

[0035] The beneficial effect of adopting the above-mentioned improvement scheme is that the semi-enclosed bucket structure can effectively reduce the damage to the mussels during transportation.

[0036] Furthermore, the base assembly includes an external annular cylindrical base and an inner ring close to the pile foundation, the range of the external annular cylindrical base is consistent with the range of the external protective net, and its upper part is close to the bottom of the support frame.

[0037] Furthermore, the base assembly is divided into a part below the seabed and a part above the seabed in a vertical direction. The part below the seabed is configured as a shallow suction bucket structure, with a water inlet on the side facing the waves and a water outlet on the side facing the waves; the part above the seabed has a hollow waterway inside, and the waterway is divided into two waterways along a circular arc from the water inlet to the water outlet. The pipeline inside the waterway is a reverse Tesla valve structure, which is used to weaken the water flow by utilizing the energy of the water flow itself on the basis of ensuring that the water body always flows, so as to weaken the water flow intensity, thereby reducing scouring and vibration.

[0038] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the base assembly utilizes the energy of the water flow itself and effectively weakens the water flow intensity through the structure of the reverse Tesla valve, thereby reducing the impact of scouring on the pile foundation. The design of seabed contact enhances the stability of the entire device and reduces the transmission of vibration.

[0039] Compared with the prior art, the offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance provided by the present invention has the following beneficial effects:

[0040] (1) The offshore wind power anti-scour and vibration reduction device solves the problem that the existing devices cannot take into account the synergistic effects of scour protection, vibration reduction and eco-friendliness;

[0041] (2) The multi-layer mesh structure of the device, the spiral winding form of the mussel seedling rope, the irregular scale structure of the pile-cultured mussels and the double-arc reverse Tesla valve spoiler base can play a role in reducing the hydrodynamic intensity, disturbing the water flow and breaking the multi-stage vortex, thereby achieving the purpose of scour protection of offshore wind power pile foundations;

[0042] (3) Spiral pile-wrapped mussel culture can destroy the formation of Karman vortex street behind the pile, using a small sea volume and area, avoiding the high water resistance effect of traditional seawater aquaculture facilities and anti-scouring devices, with low hydrodynamic load, and can achieve the purpose of vibration reduction while protecting against scouring;

[0043] (4) The large-scale seedling placement and harvesting device fully reduces the labor cost, labor intensity, and difficulty of work in deep water operation areas. The rail-type seedling placement device can achieve efficient and stable seedling placement. The double-layer protection net can also protect against marine animal erosion and extreme sea conditions. The spiral cutting harvesting head and the bucket-type harvesting head cooperate to harvest mature mussels, taking into account both efficient harvesting and mussel quality assurance. Deep-water cultured mussels have a high degree of fatness and a long fatness time.

[0044] (5) The device effectively reduces the horizontal sea area and water blocking effect required for aquaculture by winding the rope with mussel seedlings around the offshore wind power monopile foundation. The spiral winding method of the mussel seedling rope is similar to the spiral side plate of the SPAR platform, which can reduce the vibration amplitude of the marine engineering. At the same time, it can work together with the irregular scaly structure of the pile-cultured mussels and the multi-layer mesh structure of the aquaculture area. Based on the principle of reducing the hydrodynamic strength around the pile, disturbing the water flow around the pile and destroying the generation and development process of the vortex around the pile, it can achieve the purpose of vibration reduction while achieving the scouring protection of the offshore wind power monopile foundation. The bottom adopts a suction bucket type reverse Tesla valve type spoiler base device. The suction bucket structure has strong stability and is not easy to produce bottom scouring. While supporting the aquaculture frame, the water flow around the pile near the bed is weakened through the double arc reverse Tesla valve pipeline structure. It cooperates with the upper spoiler device to play a multi-level spoiler role, so that the entire device can effectively achieve the purpose of scouring protection and vibration reduction of the offshore wind power monopile foundation at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0046] Figure 1 This is a schematic diagram of the front view of the anti-scour vibration reduction device;

[0047] Figure 2 It is a top view schematic diagram of the anti-scour vibration reduction device;

[0048] Figure 3 It is a cross-sectional schematic diagram of the anti-scour vibration reduction device;

[0049] Figure 4 It is a schematic cross-sectional view of a base assembly from top view;

[0050] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0051] 1. Pile foundation; 2. Motor assembly; 3. Pile platform; 4. Cable; 5. Harvesting equipment; 6. Seedling placing equipment; 7. External frame; 8. External protective net; 9. Wooden base bed; 10. Mussel seedling rope; 11. Internal frame; 12. Internal protective net; 13. Base assembly. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0053] like Figure 1-4 As shown, an embodiment of an offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance flow provided by the present invention, in which the offshore wind power anti-scour and vibration reduction device is fixed on a pile foundation 1 in the sea, and a pile-surrounding platform 3 is arranged at the top position of the pile foundation 1, which surrounds the pile foundation 1 and is welded and fixed to the pile foundation 1; wherein the offshore wind power anti-scour and vibration reduction device comprises a motor assembly 2, a seedling lowering and harvesting assembly, a breeding and disturbance flow assembly and a base assembly 13, wherein the motor assembly 2 is located in the wind power tower inside the pile-surrounding platform 3 and the pile foundation 1; the seedling lowering and harvesting assembly is suspended below the pile-surrounding platform 3 by a cable 4, and its height is higher than the free surface of seawater at the location of the pile foundation 1; the breeding and disturbance flow assembly is located below the free surface of seawater at the location of the pile foundation 1, and its bottom is connected to the base assembly 13 to form a breeding area; the base assembly 13 is located below the breeding area, in contact with the seabed at the location of the pile foundation 1, and is used to support the breeding and disturbance flow assembly;

[0054] The base assembly 13 is a reverse Tesla valve type spoiler base, which is used to use the energy of the water flow itself to weaken the water flow intensity so as to reduce the scouring and vibration of the pile foundation 1 by seawater.

[0055] Among them, in the above technical scheme, the breeding and spoiler components include a supporting frame, a net lowering device, an external protective net 8, a wooden base bed 9 and an internal protective net 12. The supporting frame includes an external frame 7 and an internal frame 11. The external frame 7 surrounds the outside of the breeding area and is in a hollow cylindrical shape. It is welded and fixed to the internal frame 11; the internal frame 11 is wrapped around the pile foundation 1 and is in a thin-walled cylindrical shape. It is fixed to the pile foundation 1 through a flange ring, which is used to support the breeding area and protect the pile foundation 1; the wooden base bed 9 is wrapped around the outside of the internal frame 11 and is fixed to the internal frame 11 through bolts.

[0056] Furthermore, in the above technical solution, the net lowering device includes circular rings fixed on the top and bottom of the breeding and spoiler assembly, which are used to vertically drop and lay the internal protective net 12 after the mussel seedlings are lowered.

[0057] Further, in the above technical solution, a spiral groove and a guide rail are provided on the surface of the wooden base bed 9, a mussel seedling rope 10 is wound on the spiral groove, the spiral groove is used to provide a fixed position and friction for the mussel seedling rope 10, and the guide rail is used to provide mobile support for the seedling lowering and harvesting components; the mussel seedling rope 10 is wound on the wooden base bed 9, and the mussel seedlings are fixed on the mussel seedling rope 10 by foot threads;

[0058] The internal protective net 12 is wrapped around the outside of the mussel seed rope 10 to prevent the young mussel seedlings from being washed away by waves and currents; the external protective net 8 is distributed inside the external frame 7 to protect the mussel seedlings from being eaten by marine organisms and from falling off due to extreme sea conditions.

[0059] Furthermore, in the above technical scheme, the motor assembly 2 includes a power supply assembly, a power assembly, an operating table and a mussel harvesting and exporting assembly; the power supply assembly includes a wind power device and a battery device, which are respectively connected in parallel with the power assembly, and the wind power device supplies power to the power assembly through offshore wind power generation. The power supply assembly is supplied with power through dual channels to ensure the stability of power supply to the power assembly; the operating table is arranged inside the wind turbine tower, and is connected to the mussel harvesting and exporting assembly by a cable, and is used to control the seedling lowering and harvesting assembly; the power assembly is connected to the seedling lowering and harvesting assembly by a cable, and is used to provide power for the movement of the seedling lowering and harvesting assembly.

[0060] Furthermore, in the above technical solution, the mussel harvesting and exporting assembly includes a fish suction pump, an intermediate loading platform and a catheter belt. The bottom of the fish suction pump is connected to the lower seedling and harvesting assembly, and is used to suck the mussels harvested from the lower seedling and harvesting assembly to the transfer platform. One end of the catheter belt is connected to the transfer platform, and the other end is connected to the transport ship, and is used to transport the mussels in the transfer platform to the transport ship.

[0061] A fish suction pump is a device designed specifically for use in aquaculture and underwater operations, primarily for the capture, transfer, and transportation of aquatic organisms (such as fish and shellfish). The main structure is the pump body, which is usually made of corrosion-resistant materials to adapt to seawater or freshwater environments. The pump body is designed with a spiral or impeller structure inside to effectively draw in water flow and organisms. Fish suction pumps can quickly and efficiently capture aquatic organisms such as fish and mussels and transfer them to collection areas or nursery facilities.

[0062] The conduit belt is made of corrosion-resistant plastic or rubber material to ensure that it will not be damaged when used in water. Both ends are usually equipped with interfaces for connecting the transfer station and the transport ship. The inner wall should be smooth to reduce water flow resistance and prevent the organisms from being damaged during transportation.

[0063] Furthermore, in the above technical scheme, the seedling placing and harvesting assembly includes a harvesting device 5 and a seedling placing device 6, the harvesting device 5 is used to realize seedling placing and recycling, and the seedling placing device 6 is used to harvest the mussels around the pile foundation 1; the harvesting device 5 includes a moving part and a rope locking buckle, the moving part is arranged in the guide rail of the wooden base bed 9, and is used to slide in the guide rail of the wooden base bed 9; one end of the rope locking buckle is fixed to one side of the wooden base bed 9, and the other end locks the rope head of the mussel seedling rope 10, and is used to pull the mussel seedling rope 10 to be wound and distributed on the wooden base bed 9 under the drive of the moving part; the moving part and the power assembly are connected by a cable.

[0064] The moving part can adopt the specific structure of a track-type moving trolley disclosed in application number CN202420439438.9 (publication number CN221719646U), and can be displaced in the horizontal direction, vertical direction and along the track path.

[0065] Furthermore, in the above technical scheme, the seedling lowering equipment 6 is suspended in a surrounding manner at the bottom of the pile-circling platform 3, including an internal spiral cutting harvesting head and an external bucket-lifting harvesting head. The internal spiral cutting harvesting head adopts a spiral cutting blade, which is used to cut the internal protective net 12 along the direction of the mussel seedling rope 10, and shovel the mussel seedling rope 10 away from the wooden base bed 9 through the spiral shovel mouth; the external bucket-lifting harvesting head is a vertical blade, which is used to shovel mature mussels away from the wooden base bed 9 by pulling upwards, and lift the mussels to the bottom of the pile-circling platform 3 through a semi-closed bucket-lifting structure; the internal spiral cutting harvesting head and the external bucket-lifting harvesting head are both electrically connected to the power assembly.

[0066] The core of the internal spiral cutting harvesting head is the spiral blade, which is usually made of high-strength stainless steel or corrosion-resistant materials. The design of the spiral blade allows it to rotate under the action of the water flow, thereby achieving the cutting and harvesting of mussels. The angle design of the blade is usually 45 degrees to 60 degrees to optimize the cutting efficiency. The right angle can effectively cut mussels attached to the substrate and reduce damage to other marine life.

[0067] The external bucket harvesting head consists of multiple buckets, which are usually ring-shaped or curved and are designed to float in the water and collect mussels. The buckets are generally made of lightweight plastic or composite materials to reduce the overall weight and improve corrosion resistance. The inside of the bucket is usually coated with a non-slip material to improve the adhesion of the mussels. The buckets are connected to the bottom of the pile-surrounding platform 3 by hinges or slides, allowing the buckets to move up and down in the water. The bracket is usually fixed to the bottom or edge of the harvesting system to provide the necessary stability. A fine collection net is usually installed inside the bucket to ensure that the mussels do not escape during the harvesting process, while facilitating the introduction of the mussels into the bucket.

[0068] When the external bucket harvester is working, the drive device moves the bucket up and down. When the bucket sinks into the water, the water flow will bring the mussels attached to the base bed into the bucket, and the collection net inside the bucket will prevent the loss of mussels. After the bucket has collected the mussels, the bucket is lifted by the lifting mechanism, and the mussels are lifted to the surface of the water. Then they can be transferred to the processing area through a duct or conveyor belt system.

[0069] Furthermore, in the above technical solution, the base assembly 13 includes an external annular cylindrical base and an inner ring close to the pile foundation 1, the range of the external annular cylindrical base is consistent with the range of the external protective net 8, and its upper part is close to the bottom of the support frame.

[0070] When the rope lock buckle of the seedling lowering device locks the rope end of the mussel seedling rope, you can press the seedling lowering button on the console, and the seedling lowering device will move quickly along the guide rail on the wooden base bed, driving the mussel seedling rope to be wound and fixed in the groove of the wooden base bed. When the seedling lowering device reaches the end of the guide rail, the seedling lowering device will unlock the mussel seedling rope and fix it at the buckle at the end of the guide rail. At this time, the seedling lowering device will transmit the signal back to the console along the cable, indicating that the seedling lowering is completed. The operator can press the recovery button, and the seedling lowering device will slide along the guide rail to the water surface, and then be suspended by the suspension rope under the pile platform to avoid seawater erosion; when the harvest button is pressed, the harvest is completed. The equipment will start, and the harvesting equipment will move down to the bottom of the culture area, and mature mussels will be harvested from top to bottom by combining spiral harvesting and bucket harvesting. When the harvesting equipment has finished harvesting and rises to the lower part of the pile-wrapped platform, the transfer button can be pressed, and the fish suction pump will suck the mussels in the bucket to the transfer table; the duct belt can be connected to the transport ship, and the mussel seedling rope on the ship will be transported to the mussel transfer table when the seedlings are lowered, and then the mussel seedling rope will be wound into the culture device through the seedling lowering equipment. When harvesting, the harvesting device will export the harvested mature mussels to the mussel transfer table and transport them to the transport ship through the output duct belt.

[0071] Furthermore, in the above technical scheme, the base assembly 13 is divided into a part below the seabed and a part above the seabed in the vertical direction. The part below the seabed is configured as a shallow suction bucket structure, with an inlet provided on the side facing the waves and a water outlet provided on the side facing the waves; the part above the seabed has a hollow waterway inside, and the waterway is divided into two waterways along a circular arc from the water inlet to the water outlet. The pipeline inside the waterway is a reverse Tesla valve structure, which is used to weaken the water flow by utilizing the energy of the water flow itself on the basis of ensuring that the water body always flows, so as to weaken the water flow intensity, thereby reducing scouring and vibration.

[0072] The Reverse Tesla Valve is a fluid device with no moving parts, designed to control the direction of fluid flow and provide a one-way flow characteristic. It works similarly to the traditional Tesla valve, but the structure and flow path of the Reverse Tesla Valve are different. The inner cavity design usually contains multiple curved channels or grooves. These channels can have different diameters and shapes, usually some streamlined curves to guide the flow of fluid. The channel design can create a complex flow path, so that the fluid encounters more resistance when flowing in the reverse direction, but is relatively smooth when flowing in the forward direction. The flow-guiding elements can be small protrusions, depressions or other shaped obstacles. Their main purpose is to increase the vortex effect of the fluid to generate resistance by changing the direction and speed of the fluid flow. The Reverse Tesla Valve allows the fluid to flow smoothly in one direction, while creating greater flow resistance in the opposite direction.

[0073] Specifically, the principle of the present invention is that after being installed at the designated position, the fishing boat can transport the mussel seed rope to the vicinity of the pile foundation 1, fix the rope head in the rope lock buckle of the seedling lowering device, and use the operating table to let the seedling lowering device pull the mussel seed rope to wrap around the wooden base bed fixed around the pile foundation 1 for breeding. After 12-18 months of cultivation, the fishing boat can travel to the vicinity of the pile foundation 1 again, and through operation, the harvesting device can harvest the mature mussels, and then transport them to the fishing boat through the mussel harvesting and exporting device and the output conduit belt, and then transport them to the aquatic product processing plant on the shore after preliminary pretreatment on the fishing boat.

[0074] Through the two layers of porous media of the outer and inner protective nets, the spiral structure of the mussel seedling rope around the column, the irregular shape of the mussel group and the double arc reverse Tesla valve spoiler base, the boundary layer water flow around the pile is disturbed, the wave energy is broken and absorbed, and the formation and development of the horseshoe vortex and the tail vortex street are destroyed, thereby reducing the scouring around the pile and the vibration of the pile body. The water flow and sediment transport environment around the pile foundation 1 are very suitable for the growth of mussels. The growth cycle of mussels for 12-18 months also meets the maintenance cycle of offshore wind power. The development and utilization of offshore renewable energy combined with marine fisheries has achieved the goal of saving the use of the sea and using the sea in a three-dimensional manner.

[0075] The large-scale seedling placing and harvesting device fully reduces the labor cost, labor intensity, and difficulty of work in deep water operation areas. The rail-type seedling placing device can achieve efficient and stable seedling placing. The double-layer protective net also protects against marine animal erosion and extreme sea conditions. The spiral cutting harvesting head and the bucket-type harvesting head work together to harvest mature mussels, taking into account both efficient harvesting and mussel quality assurance.

Claims

1. An offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance, the offshore wind power anti-scour and vibration reduction device is fixed on a pile foundation (1) in the sea, a pile-surrounding platform (3) is arranged at the top of the pile foundation (1), the pile-surrounding platform (3) surrounds the pile foundation (1) and is welded and fixed to the pile foundation (1); characterized in that: The offshore wind power anti-scour vibration reduction device comprises a motor assembly (2), a seedling lowering and harvesting assembly, a breeding and spoiler assembly and a base assembly (13); the motor assembly (2) is located in the wind power tower inside the pile-circling platform (3) and the pile foundation (1); the seedling lowering and harvesting assembly is suspended below the pile-circling platform (3) through a cable (4), and its height is higher than the free surface of the seawater at the location where the pile foundation (1) is located; the breeding and spoiler assembly is located below the free surface of the seawater at the location where the pile foundation (1) is located, and its bottom is connected to the base assembly (13) to form a breeding area; the base assembly (13) is located below the breeding area, in contact with the seabed at the location where the pile foundation (1) is located, and is used to support the breeding and spoiler assembly; The base assembly (13) is a reverse Tesla valve-type spoiler base, which is used to use the energy of the water flow itself to reduce the intensity of the water flow so as to reduce the scouring and vibration of the pile foundation (1) by seawater.

2. According to claim 1, an offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance flow, characterized in that: The breeding and disturbance assembly comprises a supporting frame, a net lowering device, an external protective net (8), a wooden base bed (9) and an internal protective net (12); the supporting frame comprises an external frame (7) and an internal frame (11); the external frame (7) surrounds the outside of the breeding area and is in the shape of a hollow cylinder, and is welded and fixed to the internal frame (11); the internal frame (11) is wrapped around the pile foundation (1) and is in the shape of a thin-walled cylinder, and is fixed to the pile foundation (1) by a flange ring, and is used to support the breeding area and protect the pile foundation (1); the wooden base bed (9) is wrapped around the outside of the internal frame (11) and is fixedly connected to the internal frame (11) by bolts.

3. The offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance according to claim 2 is characterized in that: The net lowering device comprises circular rings fixed at the top and bottom of the culture and disturbance assembly, and is used for vertically dropping and laying the internal protective net (12) after the mussel seedlings are lowered.

4. The offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance according to claim 3 is characterized in that: The surface of the wooden base bed (9) is provided with a spiral groove and a guide rail, a mussel seedling rope (10) is wound on the spiral groove, the spiral groove is used to provide a fixed position and friction force for the mussel seedling rope (10), and the guide rail is used to provide mobile support for the mussel seedling lowering and harvesting components; the mussel seedling rope (10) is wound on the wooden base bed (9), and the mussel seedlings are fixed on the mussel seedling rope (10) by byssus; The internal protective net (12) is wrapped around the outside of the mussel seedling rope (10) to prevent the young mussel seedlings from being washed away by waves and currents; the external protective net (8) is distributed inside the external frame (7) to protect the mussel seedlings from being eaten by marine organisms and from falling off due to extreme sea conditions.

5. The offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance according to claim 4 is characterized in that: The motor assembly (2) comprises a power supply assembly, a power assembly, an operating table and a mussel harvesting and exporting assembly; the power supply assembly comprises a wind power device and a battery device, which are respectively connected in parallel with the power assembly, the wind power device supplies power to the power assembly through offshore wind power generation, and the power supply assembly supplies power through dual channels to ensure the stability of power supply to the power assembly; the operating table is arranged inside the wind power tower, connected to the mussel harvesting and exporting assembly through a cable, and is used to control the seedling lowering and harvesting assembly; the power assembly is connected to the seedling lowering and harvesting assembly through a cable, and is used to provide power for the movement of the seedling lowering and harvesting assembly.

6. The offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance according to claim 5 is characterized in that: The mussel harvesting and exporting component includes a fish suction pump, a middle loading platform and a duct belt. The bottom of the fish suction pump is connected to the lower seedling and harvesting component, and is used to suck the mussels harvested from the lower seedling and harvesting component to the transfer platform. One end of the duct belt is connected to the transfer platform, and the other end is connected to the transport ship, and is used to transport the mussels in the transfer platform to the transport ship.

7. The offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance according to claim 6 is characterized in that: The seedling placement and harvesting assembly comprises a harvesting device (5) and a seedling placement device (6), wherein the harvesting device (5) is used to place and recycle mussels, and the seedling placement device (6) is used to harvest mussels around the pile foundation (1); the harvesting device (5) comprises a moving part and a rope lock buckle, wherein the moving part is arranged in a guide rail of the wooden base bed (9) and is used to slide in the guide rail of the wooden base bed (9); one end of the rope lock buckle is fixed to one side of the wooden base bed (9), and the other end locks the rope head of the mussel seedling rope (10), and is used to pull the mussel seedling rope (10) to be wound and distributed on the wooden base bed (9) under the drive of the moving part; the moving part is connected to the power assembly through a cable.

8. The offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance according to claim 7 is characterized in that: The seedling lowering device (6) is suspended in a surrounding manner at the bottom of the pile-circling platform (3), and comprises an internal spiral cutting harvesting head and an external bucket-lifting harvesting head. The internal spiral cutting harvesting head adopts a spiral cutting blade, which is used to cut the internal protective net (12) along the direction of the mussel seedling rope (10), and shovel the mussel seedling rope (10) away from the wooden base bed (9) through the spiral shovel mouth; the external bucket-lifting harvesting head is a vertical blade, which is used to shovel mature mussels away from the wooden base bed (9) by pulling upwards, and lift the mussels to the bottom of the pile-circling platform (3) through a semi-enclosed bucket-lifting structure; the internal spiral cutting harvesting head and the external bucket-lifting harvesting head are both electrically connected to the power component.

9. The offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance according to claim 8, characterized in that: The base assembly (13) comprises an external annular cylindrical base and an inner ring closely attached to the pile foundation (1); the range of the external annular cylindrical base is consistent with the range of the external protective net (8), and its upper part is closely attached to the bottom of the support frame.

10. The offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels multi-stage disturbance according to claim 9, characterized in that: The base assembly (13) is divided into a part below the seabed and a part above the seabed in the vertical direction. The part below the seabed is arranged as a shallow suction bucket structure, with a water inlet arranged on the side facing the waves and a water outlet arranged on the side facing the waves. The part above the seabed has a hollow waterway inside, and the waterway is divided into two waterways along a circular arc from the water inlet to the water outlet. The pipeline inside the waterway is a reverse Tesla valve structure, which is used to use the energy of the water flow itself to weaken the water flow while ensuring that the water body always flows, so as to weaken the water flow intensity, thereby reducing scouring and vibration.

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