An offshore wind power anti-scouring and vibration damping device based on multi-stage flow disturbance of pile-cultured mussels

Abstract

The present invention provides an offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels with multi-stage disturbance flow, which belongs to the technical field of offshore wind power engineering. The offshore wind power anti-scour and vibration reduction device based on pile-cultured mussels with multi-stage disturbance flow is fixed on a pile foundation in the sea, and a pile-surrounding platform is arranged at the top of the pile foundation. The specific structure of the offshore wind power anti-scour and vibration reduction device includes a motor assembly, a seedling lowering and harvesting assembly, a breeding and disturbance flow assembly and a base assembly. The motor assembly is located in the pile-surrounding platform and the wind power tower inside the pile foundation; the seedling lowering and harvesting assembly is suspended below the pile-surrounding platform through a cable; the breeding and disturbance flow assembly is located below the free surface of the seawater at the position of the pile foundation, and its bottom is connected to the base assembly to form a breeding area; the problem that the existing device cannot achieve the synergistic effects of the three aspects of scour protection, vibration reduction and eco-friendliness is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of offshore wind power engineering. Specifically, it relates to an offshore wind power anti-scouring and vibration damping device based on multi-stage flow disturbance of pile-cultured mussels. Background Art

[0002] Offshore wind power foundations include monopile foundations, jacket foundations, suction bucket foundations, and floating foundations, etc. After a monopile foundation is installed in the sea, it will change the original seawater flow. Under the influence of the interaction between waves, ocean currents and the monopile structure, a downward flow will be generated in front of the pile, a horseshoe vortex will appear at the near-bed surface around the pile, and a wake vortex will appear behind the pile, and the vortex will diffuse and dissipate. This will cause scouring of the seabed around the pile. The appearance of the scouring pit exposes the part of the pile foundation that should be buried under the bed surface to seawater. On the one hand, it weakens the maximum bearing capacity of the pile foundation, and on the other hand, it increases the overall hydrodynamic load. This will make the pile foundation prone to overturning, resulting in the failure of the wind turbine. In addition, under the action of ocean currents, the generation and development of the wake vortex 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 lead to structural resonance and instability, thus reducing the efficiency or causing the failure of offshore wind power facilities. The vibration of the pile foundation will also cause liquefaction of the soil around the pile, intensifying the scouring around the pile.

[0003] At present, the pile foundation scouring protection methods are divided into three protection types according to their protection principles: active protection, passive protection, and combined protection. Active protection is to achieve scouring protection by weakening the hydrodynamic force around the pile. Passive protection is to achieve scouring protection by enhancing the anti-scouring ability of the bed surface. Combined protection is to combine multiple protection methods to complement their deficiencies to achieve protection. However, the existing methods still have problems such as lack of ecological friendliness, short protection validity period, and high construction and maintenance costs. For example, problems such as settlement and displacement of riprap will occur in riprap protection, and riprap needs to be replenished regularly. Considering resource conservation and ecological friendliness, some literature has pointed out that offshore wind power can be combined with seawater aquaculture, and scouring protection can be achieved through seawater aquaculture facilities.

[0004] The existing mussel culture methods based on offshore wind power are mainly hanging culture and layered bottom-sitting culture in culture boxes. These two methods have limited disturbance to water flow, require a large sea area for use, will cause a large water blocking effect, and the overly large and wide culture cages will also increase the mass of the upper part of the pile. These problems will lead to an increase in the vibration amplitude of the pile foundation in the existing offshore wind power monopile foundation scouring protection methods combined with seawater aquaculture. On the one hand, while protecting against scouring and conducting 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 scouring, reducing the effect of scouring protection.

[0005] The 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-shaped marine economic crops, and a heavy ballast for anchoring is set at the lower end of the aquaculture net. Cultivating strip-shaped marine economic crops through aquaculture nets can disrupt ocean currents and settle silt, thereby playing an anti-scour protection role. However, the narrow-top and wide-bottom 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.

[0006] The Chinese patent with application number 202111089021.1 (publication number CN113718841B) discloses an offshore wind power anti-scour device. The invention sets a sleeve and an energy dissipation part outside the offshore wind power pile foundation, and uses the through holes on the energy dissipation part and the sleeve to provide flow disturbance and scour protection. However, the energy dissipation part will be destroyed during the energy dissipation process, thereby increasing the cost of its construction and maintenance, and the support of the device mainly depends on the anti-sinking plate under the sleeve structure. The bottom of the anti-sinking plate itself will have a scouring problem, 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.

[0007] In summary, the existing devices cannot achieve the synergistic effects of scour protection, vibration reduction and eco-friendliness. Summary of the invention

[0008] 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.

[0009] The present invention is achieved in that:

[0010] The present invention provides an anti-scouring and vibration-damping device for offshore wind power based on multi-stage flow disturbance of pile-cultured mussels. The anti-scouring and vibration-damping device for offshore wind power is fixed on a pile foundation in the sea. A pile-around platform is arranged at the top position of the pile foundation. The pile-around platform surrounds the periphery of the pile foundation and is fixedly welded to the pile foundation. Among them, the anti-scouring and vibration-damping device for offshore wind power includes a motor assembly, a seeding and harvesting assembly, a cultivation and flow-disturbance assembly, and a base assembly. The motor assembly is located in a wind power tower barrel inside the pile-around platform and the pile foundation. The seeding and harvesting assembly is suspended below the pile-around platform by a cable, and its height is higher than the free surface of the seawater at the position of the pile foundation. The cultivation and flow-disturbance assembly is located below the free surface of the seawater at the position of the pile foundation, and its bottom is connected to the base assembly to form a cultivation area. The base assembly is located below the cultivation area and contacts the seabed at the position of the pile foundation, and is used to support the cultivation and flow-disturbance assembly.

[0011] The base assembly is a reverse Tesla valve type flow-disturbance base, which is used to utilize the energy of the water flow itself to weaken the water flow intensity so as to weaken the scouring and vibration of the seawater on the pile foundation.

[0012] The technical effects of the anti-scouring and vibration-damping device for offshore wind power based on multi-stage flow disturbance of pile-cultured mussels provided by the present invention are as follows: The pile foundation is the basic part of the offshore wind power device and is mainly responsible for bearing the wind power tower barrel and other equipment. Since it is fixed on the seabed, it provides the necessary stability to resist the influence of ocean currents and wind power.

[0013] Pile-around platform: The pile-around platform surrounds the pile foundation and is fixedly welded, providing additional support and stability. It provides a platform for other components to ensure the safety and stability of the equipment during offshore operations.

[0014] The motor assembly is located in the wind power tower barrel inside the pile foundation. The motor assembly provides power support for driving the seeding and harvesting assembly and the cultivation and flow-disturbance assembly. Through the control of the motor, precise management of the cultivation process and water flow disturbance can be achieved, improving the efficiency and response speed of the device.

[0015] The seeding and harvesting assembly is suspended below the pile-around platform by a cable. The height of this assembly is designed above the free surface of the seawater to ensure that it will not be impacted by the water flow. Its main function is to carry out seeding and harvesting of aquatic organisms such as mussels. Through effective operation, the cultivation efficiency can be improved while reducing the interference with the water body.

[0016] The cultivation and flow-disturbance assembly is located below the free surface of the seawater of the pile foundation, and its bottom is connected to the base assembly to form a cultivation area. The design of this assembly aims to provide a good growth environment and affect the state of the surrounding water flow through flow disturbance. Effective water flow disturbance can improve the nutrient cycle of the water body and provide the required environment for the growth of mussels.

[0017] The base assembly, as a reverse Tesla valve type spoiler base, its main function is to utilize the energy of the water flow itself to weaken the water flow intensity. 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.

[0018] This device can effectively reduce the scouring and vibration effects of seawater on the pile foundation, enhance the structural stability, and extend the service life of offshore wind power equipment. In addition, the cooperation of the aquaculture and spoiler components and the seeding and harvesting components further improves the functionality of the device, enabling it not only to prevent scouring but also to achieve the purpose of ecological aquaculture and promote the sustainable utilization of marine resources.

[0019] Based on the above technical solutions, a kind of offshore wind power anti-scouring and vibration reduction device based on multi-stage spoiler for culturing mussels on piles of the present invention can also be improved as follows:

[0020] Among them, the aquaculture and spoiler components include a support frame, a net-laying device, an outer protective net, a wooden base bed, and an inner protective net. The support frame includes an outer frame and an inner frame. The outer frame surrounds the outside of the aquaculture area, is in a hollow cylindrical shape, and is fixedly welded to the inner frame; the inner frame wraps around the pile foundation, is in a thin-walled cylindrical shape, and is fixedly connected to the pile foundation through a flange ring, and is used to support the aquaculture area and protect the pile foundation; the wooden base bed wraps around the outside of the inner frame and is fixedly connected to the inner frame through bolts.

[0021] Furthermore, the net-laying device includes rings fixed at the top and bottom of the aquaculture and spoiler components, and is used to vertically lay the inner protective net after the seeding of mussel seedlings is completed.

[0022] Furthermore, the surface of the wooden base bed is provided with spiral grooves and guide rails. A mussel seedling rope is wound around the spiral grooves. The spiral grooves are used to provide a fixed position and friction force for the mussel seedling rope, and the guide rails are used to provide moving support for the seeding and harvesting components; the mussel seedling rope is wound around the wooden base bed, and mussel seedlings are fixed to the mussel seedling rope through byssus;

[0023] The inner protective net wraps around the outside of the mussel seedling rope and is used to prevent mussel seedlings in the juvenile stage from being washed away by sea waves and ocean currents; the outer protective net is distributed inside the outer frame and is used to protect mussel seedlings from being eaten by marine organisms and falling off due to the invasion of extreme sea conditions.

[0024] The beneficial effects of adopting the above improvement scheme are as follows: The combination of the aquaculture and turbulence components through the support frame and the wooden substrate can effectively form an environment suitable for the growth of mussels. At the same time, the turbulence weakens the intensity of the water flow, thereby reducing the scour of the pile foundation. The setting of the internal protective net can effectively prevent juvenile mussels from being washed away by the waves in the early growth stage, ensuring the growth success rate.

[0025] The spiral groove design of the wooden substrate provides fixation and friction for the mussel seedling ropes, which helps the attachment and growth of mussels. The design of the guide rail allows the seedling and harvesting components to slide on it, improving the flexibility and efficiency of the operation.

[0026] The external protective net prevents the predation of mussel seedlings by foreign organisms, while the internal protective net protects juvenile mussels and reduces the impact of sea waves. The dual protection design effectively copes with the challenges of various marine organisms and extreme sea conditions.

[0027] Furthermore, the motor assembly includes a power supply assembly, a power assembly, an operation console, and a mussel harvesting and export 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. The power supply assembly uses dual-channel combined power supply to ensure the stability of power supply to the power assembly; the operation console is arranged inside the wind power tower and is connected to the mussel harvesting and export assembly through a cable, and is used to control the seedling and harvesting components; the power assembly is connected to the seedling and harvesting components through a cable and is used to provide power for the movement of the seedling and harvesting components.

[0028] The beneficial effects of adopting the above improvement scheme are as follows: The motor assembly provides the necessary power to drive the movement of parts such as the seedling and harvesting components and the aquaculture and turbulence components. The combination of the wind power device and the battery ensures the stable operation of the motor under different environmental conditions, thus ensuring the high efficiency and reliability of the entire device.

[0029] Furthermore, the mussel harvesting and export assembly includes a fish suction pump, a transfer station, and a conduit belt. The bottom of the fish suction pump is connected to the seedling and harvesting components and is used to suck the harvested mussels in the seedling and harvesting components to the transfer station. One end of the conduit belt is connected to the transfer station, and the other end is connected to a transport ship, and is used to transport the mussels in the transfer station to the transport ship.

[0030] The beneficial effects of adopting the above 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, optimizing the entire harvesting process.

[0031] Furthermore, the seedling dropping and harvesting assembly includes a harvesting device and a seedling dropping device. The seedling dropping device is used for seedling dropping and recovery, and the harvesting device is used for harvesting the mussels around the pile foundation. The seedling dropping device includes a moving member and a rope locking buckle. The moving member is arranged in the guide rail of the wooden foundation bed and is used for sliding in the guide rail of the wooden foundation bed. One end of the rope locking buckle is fixed on one side of the wooden foundation bed, and the other end locks the rope head of the mussel seedling rope, and is used for driving the mussel seedling rope to be wound and distributed on the wooden foundation bed under the drive of the moving member. The moving member is connected to the power assembly through a cable.

[0032] The beneficial effects of adopting the above improvement scheme are as follows: Through the design of being suspended below the pile-around platform by cables, the process of seedling dropping and harvesting of mussel seedlings can be effectively controlled, avoiding direct impact on the pile foundation. Through the cooperation of the moving member and the rope locking buckle, it is ensured that during the harvesting of mussels, precise operation can be carried out, reducing interference with other organisms and the environment.

[0033] Furthermore, the harvesting device is suspended around the bottom of the pile-around platform and includes an internal spiral cutting harvesting head and an external bucket-type harvesting head. The internal spiral cutting harvesting head adopts a spiral cutting blade and is used for cutting the internal protective net along the direction of the mussel seedling rope, and shoveling the mussel seedling rope away from the wooden foundation bed through a spiral shovel opening. The external bucket-type harvesting head has a vertical blade and is used for shoveling the mature mussels away from the wooden foundation bed by lifting upwards, and lifting the mussels to the lower part of the pile-around platform through a semi-closed bucket structure. Both the internal spiral cutting harvesting head and the external bucket-type harvesting head are electrically connected to the power assembly.

[0034] The beneficial effect of adopting the above improvement scheme is that the semi-closed bucket structure can effectively reduce the damage to mussels during transportation.

[0035] Furthermore, the base assembly includes an outer circular cylindrical base and an inner ring closely attached to the pile foundation. The range of the outer circular cylindrical base is consistent with the range of the outer protective net, and its upper part is closely attached to the bottom of the support frame.

[0036] Furthermore, the base assembly is divided into a part below the seabed and a part above the seabed in the vertical direction. The part below the seabed is set as a shallow suction bucket structure, with a water inlet on the wave-facing side and a water outlet on the wave-backing side. There are hollow water channels inside the part above the seabed. The water channels are divided into two water channels along the circular arc of the ring from the water inlet to the water outlet. The pipelines inside the water channels are of a reverse Tesla valve structure, which is used to weaken the water flow by using the energy of the water flow itself on the basis of ensuring that the water body is always flowing, so as to weaken the water flow intensity, thereby weakening the scouring and vibration.

[0037] The beneficial effects of adopting the above 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 contacting the seabed enhances the stability of the entire device and reduces the transmission of vibration.

[0038] Compared with the prior art, the beneficial effects of an offshore wind power anti-scouring and vibration damping device based on multi-stage flow disturbance for culturing mussels on piles provided by the present invention are as follows:

[0039] (1) This offshore wind power anti-scouring and vibration damping device solves the problem that the existing devices cannot take into account the synergistic effects of scouring protection, vibration reduction and ecological friendliness.

[0040] (2) The multi-layer mesh structure, spiral winding form of the mussel seedling ropes, irregular squamous structure of culturing mussels on piles and double-arc reverse Tesla valve type flow disturbance base of this device can play the roles of weakening the hydrodynamic intensity, disturbing the water flow movement and multi-stage vortex breaking, so as to achieve the purpose of scouring protection for offshore wind power pile foundations.

[0041] (3) Spiral winding the piles to culture mussels can destroy the generation of the Karman vortex street behind the piles, with small sea volume and area, avoiding the high water resistance effect of traditional seawater aquaculture facilities and anti-scouring devices, having low hydrodynamic loads, and being able to achieve the purpose of vibration reduction while carrying out scouring protection.

[0042] (4) The large-scale seedling planting and harvesting device fully reduces the labor cost, labor intensity and working difficulty in large water depth operation areas. The guide rail type seedling planting device can achieve efficient and stable seedling planting. The double-layer protection net protects against the erosion of marine animals and extreme sea conditions at the same time. The spiral cutting harvesting head and the bucket type harvesting head cooperate to harvest mature mussels, taking into account efficient harvesting and ensuring the quality of mussels. The fatness degree of mussels cultured in deep water is high and the fattening time is long.

[0043] (5) By winding the ropes with mussel seedlings around the single pile foundation of offshore wind power, this device effectively reduces the horizontal sea area required for aquaculture and the water resistance effect. The spiral winding method of the mussel seedling ropes, similar to the spiral side plates of the spar platform, can weaken the vibration amplitude of ocean engineering. At the same time, acting together with the irregular squamous structure of culturing mussels on piles and the multi-layer mesh structure of the aquaculture area, it can, based on the principle of weakening the hydrodynamic intensity around the pile, disturbing the water flow movement around the pile and destroying the generation and development process of the vortex around the pile, achieve the purpose of vibration reduction while carrying out scouring protection for the single pile foundation of offshore wind power. The bottom adopts a suction bucket type reverse Tesla valve type flow disturbance base device. The suction bucket structure has strong stability and is not easy to generate bottom scouring. While supporting the aquaculture frame, it weakens the water body flow around the pile near the bed surface through the double-arc reverse Tesla valve type pipeline structure, and cooperates with the upper flow disturbance device to play a role in multi-stage flow disturbance, enabling the entire device to efficiently achieve the purposes of scouring protection and vibration reduction for the single pile foundation of offshore wind power at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0045] Figure 1 Front view schematic diagram of the anti-scouring and vibration damping device;

[0046] Figure 2 Top view schematic diagram of the anti-scouring and vibration damping device;

[0047] Figure 3 Cross-sectional schematic diagram of the anti-scouring and vibration damping device;

[0048] Figure 4 Top view cross-sectional schematic diagram of the base assembly;

[0049] In the drawings, the list of components represented by each reference numeral is as follows:

[0050] 1, Pile foundation; 2, Motor assembly; 3, Pile-winding platform; 4, Cable; 5, Harvesting equipment; 6, Seedling-planting equipment; 7, Outer frame; 8, Outer protective net; 9, Wooden base; 10, Mussel seedling rope; 11, Inner frame; 12, Inner protective net; 13, Base assembly. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0052] As Figures 1-4 shown, it is an embodiment of a multi-stage flow disturbance-based offshore wind power anti-scouring and vibration damping device for mussel cultivation using piles provided by the present invention. In this embodiment, the offshore wind power anti-scouring and vibration damping device is fixed on the pile foundation 1 in the sea. A pile-winding platform 3 is provided at the top position of the pile foundation 1. The pile-winding platform 3 surrounds the four sides of the pile foundation 1 and is fixedly welded to the pile foundation 1. Among them, the offshore wind power anti-scouring and vibration damping device includes a motor assembly 2, a seedling-planting and harvesting assembly, a cultivation and flow disturbance assembly, and a base assembly 13. The motor assembly 2 is located in the wind power tower barrel inside the pile-winding platform 3 and the pile foundation 1. The seedling-planting and harvesting assembly is suspended below the pile-winding platform 3 through a cable 4, and its height is higher than the free surface of the seawater at the position of the pile foundation 1. The cultivation and flow disturbance assembly is located below the free surface of the seawater at the position of the pile foundation 1, and its bottom is connected to the base assembly 13 to form a cultivation area. The base assembly 13 is located below the cultivation area and contacts the seabed at the position of the pile foundation 1, and is used to support the cultivation and flow disturbance assembly;

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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;

[0057] 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.

[0058] 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.

[0059] Furthermore, in the above technical solution, the mussel harvesting and exporting component includes a fish suction pump, a transfer table, and a conduit belt. The bottom of the fish suction pump is connected to the seeding and harvesting component, and is used to suck the mussels harvested in the seeding and harvesting component to the transfer table. One end of the conduit belt is connected to the transfer table, and the other end is connected to a transport ship, and is used to transport the mussels in the transfer table to the transport ship.

[0060] A fish suction pump is a device specially designed for aquaculture and underwater operations, mainly used for fishing, transferring, and transporting aquatic organisms (such as fish and shellfish). Its main structure is the pump body, which is usually made of corrosion-resistant materials to adapt to seawater or freshwater environments. The inside of the pump body is designed with a spiral or impeller structure to effectively suck water flow and organisms. A fish suction pump can quickly and effectively catch aquatic organisms such as fish and mussels and transfer them to a collection area or a nursery facility.

[0061] The conduit belt is made of corrosion-resistant plastic or rubber materials to ensure that it will not be damaged when used in water. Usually, interfaces are provided at both ends for connecting the transfer table and the transport ship. The inner wall should be smooth to reduce water flow resistance and prevent organisms from being damaged during transportation.

[0062] Furthermore, in the above technical solution, the seeding and harvesting component includes a harvesting device 5 and a seeding device 6. The seeding device 6 is used to achieve seeding and recovery, and the harvesting device 5 is used to harvest the mussels around the pile foundation 1; the seeding device 6 includes a moving part and a rope locking buckle. The moving part is arranged in the guide rail of the wooden foundation bed 9 and is used to slide in the guide rail of the wooden foundation bed 9; one end of the rope locking buckle is fixed to one side of the wooden foundation bed 9, and the other end locks the rope head of the mussel seedling rope 10 and is used to drive the mussel seedling rope 10 to wind and distribute on the wooden foundation bed 9 under the drive of the moving part; the moving part is connected to the power component through a cable.

[0063] The moving part can adopt the specific structure of an orbital moving trolley disclosed in the patent application with the application number CN202420439438.9 (publication number CN221719646U) and perform displacements in the horizontal direction, vertical direction, and along the path of the track.

[0064] Furthermore, in the above technical solution, the harvesting device 5 is suspended around the bottom of the pile-winding platform 3 and includes an internal spiral cutting harvesting head and an external bucket-type harvesting head. The internal spiral cutting harvesting head uses a spiral cutting blade and 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 foundation bed 9 through a spiral shovel opening; the external bucket-type harvesting head has a vertical blade and is used to shovel the mature mussels away from the wooden foundation bed 9 by lifting upward and lift the mussels to the lower part of the pile-winding platform 3 through a semi-closed bucket structure; both the internal spiral cutting harvesting head and the external bucket-type harvesting head are electrically connected to the power component.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] When the rope-locking buckle of the seeding device locks the rope end of the mussel seedling rope, the seeding key on the console can be pressed, and the seeding device will move quickly along the guide rail on the wooden base, driving the mussel seedling rope to wind and fix in the groove of the wooden base. When the seeding device reaches the end of the guide rail, the seeding device will unlock the mussel seedling rope and fix it at the buckle at the end of the guide rail. At this time, the seeding device will transmit a signal back to the console along the cable, indicating that the seeding is completed. The operator can press the recovery key, and the seeding device will slide along the guide rail to the water surface and then be suspended under the pile-winding platform by the suspension rope to avoid seawater erosion; when the harvesting key is pressed, the harvesting device will be activated. The harvesting device moves down to the bottom of the breeding area and harvests the mature mussels from top to bottom by combining spiral harvesting and bucket harvesting. When the harvesting device rises to the lower part of the pile-winding platform after harvesting, the transfer key can be pressed, and the fish suction pump will suck the mussels in the bucket to the transfer table; the conduit belt can be connected to the transport ship to transport the mussel seedling rope on the ship to the mussel transfer table during seeding, and then the seeding device will wind the mussel seedling rope into the breeding device. During 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 conduit belt.

[0070] Further, in the above technical solution, 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 set as a shallow suction bucket structure, with a water inlet on the wave-facing side and a water outlet on the wave-backing side; there is a hollow water channel inside the part above the seabed. The water channel is divided into two water channels along the circular arc from the water inlet to the water outlet. The pipeline inside the water channel is of a reverse Tesla valve structure, which is used to weaken the water flow by using 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.

[0071] The reverse Tesla valve is a fluid device without moving parts, designed to control the direction of fluid flow and provide a one-way flow characteristic. Its working principle is similar to that of the traditional Tesla valve, but the structure and flow path of the reverse Tesla valve are different. The inner cavity design usually includes multiple curved channels or grooves. These channels can have different diameters and shapes, usually some streamlined curves to guide the fluid flow. The design of the channels can create a complex flow path, making the fluid encounter more resistance when flowing in the reverse direction, while flowing relatively smoothly in the forward direction. The flow guiding elements can be small protrusions, depressions or other shaped obstacles. Their main purpose is to enhance the eddy current effect of the fluid by changing the direction and speed of the fluid flow to generate resistance. The reverse Tesla valve can make the fluid flow smoothly in one direction and generate greater flow resistance in the opposite direction.

[0072] 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.

[0073] 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.

[0074] 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 weaken the water flow intensity so as to reduce the scouring and vibration of the pile foundation (1) by seawater; The breeding and disturbance assembly comprises a support frame, a net lowering device, an external protective net (8), a wooden base bed (9) and an internal protective net (12); 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 seedling placing and harvesting assembly comprises a harvesting device (5) and a seedling placing device (6), wherein the seedling placing device (6) is used for placing and recovering the seedlings, and the harvesting device (5) is used for harvesting the mussels around the pile foundation (1); the seedling placing device (6) 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 for sliding 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 for pulling 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.

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 support 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) via 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) via 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 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 harvesting device (5) 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.

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 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.

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) 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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