Offshore wind turbine foundation integrated with aquaculture net cage and method

Abstract

The invention provides an offshore wind turbine foundation of an integrated aquaculture net cage and a method, relates to the field of wind driven generators, and aims to solve the problem that fishing is inconvenient when the existing offshore wind turbine foundation is integrated with the net cage for aquaculture. The nodes can be driven by the lifting mechanism to ascend and descend relative to the top opening of the net cage, so that the bottom net ascends and descends to change the volume of the net cage, the bottom net descends to increase the volume of the net cage to meet the requirement for the breeding range during breeding, and the bottom net ascends to reduce the volume of the net cage to reduce the activity range of internal bred marine products during fishing. The problem of interference with the foundation frame caused by operation fishing at the deeper position of the net cage is solved, operation fishing is facilitated, and the fishing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of wind turbines, and in particular to an offshore wind turbine foundation and method integrated with a breeding cage. Background Art

[0002] In the integration scheme of offshore wind power and marine ranching, a common form is to install aquaculture nets in the space enclosed by the duct frame and side support frame of the wind turbine foundation and within a certain vertical range to form a closed aquaculture space for marine fish farming. That is, within a certain vertical range, the duct frame of the wind turbine foundation and the side support frame are used as the frame of the aquaculture cage. The duct frame and support frame of the wind turbine foundation are utilized, and only accessories such as nets need to be additionally installed on this basis to form a marine aquaculture cage. The aquaculture cage with a duct frame wind turbine foundation and aquaculture nets has the advantages of simple structure and relatively low cost. However, since the net of the aquaculture cage is set inside the duct frame and side support frame of the wind turbine, the support frame outside the net and the support frame above the cage will interfere with the fish collecting equipment and the fish collecting operation process, increasing the difficulty of the fish collecting operation.

[0003] A Chinese patent (publication number: CN218717260U) discloses a facility combining an offshore wind power floating foundation with deep-sea aquaculture, which combines a semi-submersible frame-type floating body and a deep-sea aquaculture cage into one, which can meet the requirements of both offshore wind power frame-type floating bodies and deep-sea aquaculture cages, and can share a set of anchor chain systems. However, it adopts a cage arrangement around the wind turbine foundation, and there is no shielding structure on the upper part of the cage, which is convenient for fishing and collecting fish. The wind turbine tower is located above the cage structure in the wind turbine foundation conductor frame, and the fish can only be collected through the side conductor frame and support frame. When the vertical depth of the cage is large, the conductor frame and support frame will interfere with the operating tools, and the operation difficulty is still high; although a fish suction pump can be used to suck the fish from the cage together with the water and the fish to the transport ship, the efficiency of collecting fish is low and the time-consuming fish collection is long due to the continuous entry of seawater into the cage. However, the sea conditions in the deep sea are usually harsh, which requires that the farmed seafood must be quickly transferred from the aquaculture cages to the transport ships. As a result, the efficiency of catching farmed seafood in the aquaculture cages integrated with the existing wind turbine foundation is unable to meet the demand. Summary of the invention

[0004] The purpose of the present invention is to provide an offshore wind turbine foundation and method with an integrated aquaculture cage in view of the defects of the prior art. The cage is placed in a basic frame, and the connection position of the bottom and side frames of the cage serves as a node. The node can be lifted and lowered relative to the top opening of the cage under the drive of a lifting mechanism, thereby lifting and lowering the bottom net and changing the volume of the cage. During aquaculture, the bottom net falls to increase the volume of the cage to meet the aquaculture range requirements. During fishing, the bottom net rises to reduce the volume of the cage to reduce the activity range of the cultured seafood inside, thereby reducing the problem of interference with the basic frame when operating fishing in a deeper position of the cage, facilitating fishing operations and improving fishing efficiency.

[0005] The first object of the present invention is to provide an offshore wind turbine foundation with an integrated aquaculture cage, using the following scheme: include: The foundation frame includes a conductor frame and a support frame, and the conductor frames are connected to the support frames to form a terraced frame structure; The cage is a box-shaped structure with an open top formed by side nets and a bottom net. The sides of the bottom net are connected to bottom wires respectively. The side nets at the junction of adjacent sides of the cage are connected to side wires. Each side wire extends vertically along the basic frame to connect to the bottom wire to form a node. The retractable assembly includes a lifting mechanism and fasteners. The output end of the lifting mechanism is connected to the node through the fastener to drive the node to rise and fall relative to the top opening of the net box to change the volume of the net box.

[0006] Furthermore, the lifting mechanism includes a winch unit and a flexible rope, a guide member is fixed to the base frame, one end of the flexible rope is wound around the first output end of the winch unit, and the other end of the flexible rope is wound around the second output end of the winch unit after passing around the guide member, and a fastener is connected to the flexible rope between the winch unit and the guide member.

[0007] Furthermore, the base frame is connected with a guide rod which is distributed parallel to the catheter frame, and the fastener is sleeved outside the guide rod and can slide along the guide rod under the drive of the flexible cable.

[0008] Furthermore, a working platform is installed on the basic frame, the working platform is arranged circumferentially corresponding to the top opening of the net box, and the lifting mechanism is installed on the working platform.

[0009] Furthermore, the bottom wires at adjacent sides of the bottom net are connected to form side wires, and each corner position of the bottom net forms a node, and buckles are installed at the nodes to connect the fasteners.

[0010] Furthermore, a float and a sinker are installed on the bottom frame, and the fastener can be moved to the top opening of the cage under the drive of the lifting mechanism.

[0011] Furthermore, the basic frame includes a plurality of pipe racks distributed circumferentially around the cage, and the support frame is a cross rod group.

[0012] Furthermore, the catheter racks are provided with four, which are distributed obliquely relative to the vertical direction, and the side rails are distributed in a one-to-one correspondence with the catheter racks.

[0013] The second object of the present invention is to provide a working method of an offshore wind turbine foundation integrated with aquaculture cage as described in the first object, comprising: Install the net box in the basic frame, and install the retractable assembly, so that the lifting mechanism of the retractable assembly is connected to the nodes of the net box through fasteners; The lifting mechanism lowers the nodes to make the bottom net fall to the bottom, and a breeding space is formed inside the cage; The lifting mechanism elevates the nodes to raise the bottom net, which gradually reduces the volume of the cage and reduces the scope of the breeding space for fishing; After the fishing is completed, the lower node causes the bottom net to fall, and the volume of the cage content gradually expands to form a breeding space.

[0014] Furthermore, when the node is lifted, the node gradually approaches the vertical center axis of the basic frame, and the overlapping and hanging side nets are located outside the range of the bottom net.

[0015] Compared with the prior art, the present invention has the following advantages and positive effects: (1) In order to solve the problem that the integrated cage culture on the offshore wind turbine foundation is inconvenient to fish, the cage is placed in the foundation frame. The connection position of the bottom and side frames of the cage is used as a node. The node can be raised and lowered relative to the top opening of the cage under the drive of the lifting mechanism, thereby raising and lowering the bottom net and changing the volume of the cage. During aquaculture, the bottom net falls to increase the volume of the cage to meet the aquaculture range requirements. During fishing, the bottom net rises to reduce the volume of the cage to reduce the activity range of the cultured seafood inside. This reduces the problem of interference with the foundation frame when operating fishing in a deeper position of the cage, facilitates fishing operations, and improves fishing efficiency.

[0016] (2) The basic frame is a step-type frame structure. When the bottom net is close to the bottom of the basic frame, the fasteners are distributed on the large bottom surface of the step-type frame structure. When the bottom net is close to the top of the basic frame, the fasteners are distributed on the small top surface of the step-type frame structure. Therefore, in the process of the fasteners driving the nodes to gradually rise and approach the opening of the net cage, a gradually closing structure is formed, which can gradually reduce its range and facilitate fish collecting and fishing operations.

[0017] (3) The lifting mechanism consists of a winch unit and a flexible rope. Through the coordinated work of the two output ends, the extension or shortening of the flexible rope can be accurately controlled, thereby achieving smooth lifting and lowering of the node. The volume of the cage can be adjusted at any time according to the growth of seafood and aquaculture needs, and the nets that constitute the side nets and bottom nets can be easily replaced, so as to facilitate timely and rapid replacement according to the biological attachment on the cage. The flexible rope passes around the guide fixed on the basic frame and is wound around the second output end of the winch unit, ensuring the smooth movement of the flexible rope and improving the stability of the entire lifting system. This stability is particularly important in harsh sea conditions, as it can ensure that the cage and the seafood inside are not affected by the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 Schematic diagram of the offshore wind turbine foundation integrated with aquaculture cages in Examples 1 and 2 of the present invention.

[0020] Figure 2 It is a schematic diagram of the installation of the retractable components on the basic frame in Examples 1 and 2 of the present invention.

[0021] Figure 3 Schematic diagram of the fasteners in Examples 1 and 2 of the present invention.

[0022] Among them, 1. basic frame; 101. conductor frame; 102. support frame; 2. net box; 21. side line; 22. side net; 23. bottom net; 24. bottom line; 3. working platform; 4. bottom frame; 5. winch unit; 51. first winch; 52. second winch; 6. guide wheel; 7. guide rod; 8. flexible rope; 81. first flexible rope; 82. second flexible rope; 9. fastener; 91. first half ring; 92. fixed shaft; 93. second half ring; 10. guide piece; 11. rope buckle; 12. float; 13. sinker. DETAILED DESCRIPTION

[0023] Example 1 In a typical embodiment of the present invention, Figure 1-Figure 3 As shown, an offshore wind turbine foundation with integrated aquaculture cages is provided.

[0024] At present, the facilities combining offshore wind power floating foundation and deep-sea aquaculture have the problems of difficult fishing operation and low efficiency. Especially when the cage 2 is arranged around the wind turbine foundation, due to the presence of the wind turbine tower, the fishing operation can only be carried out from the side, and when the vertical depth of the cage 2 is large, the conductor frame 101 and the support frame 102 will interfere with the operating tools, increasing the complexity of the operation. In addition, although fish suction pumps can be used for fishing, the continuous entry of seawater into the cage 2 leads to low fishing efficiency, especially in the harsh sea conditions in the deep sea, this problem is particularly prominent. Based on this, this embodiment proposes an offshore wind turbine foundation with an integrated aquaculture cage, wherein the cage 2 is placed in the basic frame 1, and the connection position of the bottom frame 24 and the side frame 21 of the cage 2 is used as a node. The node can be lifted and lowered relative to the top opening of the cage 2 under the drive of the lifting mechanism, thereby lifting and lowering the bottom net 23 and changing the volume of the cage 2. During aquaculture, the bottom net 23 falls to increase the volume of the cage 2 to meet the aquaculture range requirements. During fishing, the bottom net 23 rises to reduce the volume of the cage 2 to reduce the activity range of the cultured seafood inside, thereby reducing the problem of interference with the basic frame 1 caused by fishing operations in a deeper position of the cage 2, facilitating fishing operations, and improving fishing efficiency.

[0025] like Figure 1 As shown, the offshore wind turbine foundation of the integrated aquaculture cage mainly includes a basic frame 1, a cage 2 and a retractable assembly.

[0026] The basic frame 1 includes a pipe frame 101 and a support frame 102, which serves as both a support structure for the cage 2 and a basic structure for an offshore wind turbine. The pipe frames 101 are connected by the support frame 102 to form a terraced frame structure with a layout space inside, which not only provides a stable foundation but also allows the aquaculture cage 2 to be installed inside the frame.

[0027] The net cage 2 is a box-shaped structure with an open top formed by side nets 22 and bottom nets 23, and both the side nets 22 and bottom nets 23 can withstand the aquaculture nets of the marine environment. Figure 1 As shown, the side of the cage 2 is a cylindrical structure surrounded by a side net 22, and the bottom of the cage 2 is a bottom net 23, which blocks the bottom of the cylindrical structure surrounded by the side net 22, thereby forming a space for farmed seafood activities. Seawater can enter the cage 2 through the mesh on the cage 2, and the side net 22 and the bottom net 23 can prevent farmed seafood from escaping from the cage 2. It can be understood that the top opening of the cage 2 can be arranged above the sea surface, thereby restricting the farmed seafood from moving in the cage 2.

[0028] The sides of the bottom net 23 are connected to the bottom wires 24 respectively, which are used to support the bottom net 23 and can drive the bottom net 23 to move and adjust the position. The side nets 22 at the junction of the adjacent sides of the cage 2 are connected to the side wires 21, which extend vertically along the basic frame 1 and are connected to the bottom wires 24 to form a node. The node is the key point of the lifting mechanism.

[0029] The retractable assembly includes a lifting mechanism and a fastener 9. The output end of the lifting mechanism is connected to the node through the fastener 9 to drive the node to rise and fall relative to the top opening of the net box 2. The lifting mechanism drives the fastener 9 to change the position of the node, so that the bottom net 23 moves; when multiple nodes are distributed circumferentially on the bottom net 23 and driven by one or more lifting mechanisms, the bottom net 23 can be lifted and lowered, and the height of the bottom net 23 can be changed accordingly, thereby changing the volume of the net box 2.

[0030] During the breeding period, the bottom net 23 falls to a lower position, increasing the volume of the cage 2 to meet the breeding range requirements. During the fishing period, the bottom net 23 rises to a higher position, reducing the volume of the cage 2, thereby reducing the activity range of the cultured seafood inside, reducing the problem of interference with the basic frame 1 when operating fishing in a deeper position of the cage 2, facilitating fishing operations, and improving fishing efficiency.

[0031] The lifting mechanism and fasteners 9 can drive the nodes to move, allowing the height and volume of the cage 2 to be adjusted according to actual needs, so as to adapt to different aquaculture needs and fishing conditions. The base frame 1 of the terrace frame structure provides good stability, ensuring the safety of the cage 2 and the farmed seafood in severe sea conditions. The problems of difficult fishing operations and low efficiency in the prior art are solved, and an offshore wind turbine foundation with an integrated aquaculture cage is provided with a stable structure, strong adaptability and high fishing efficiency.

[0032] like Figure 2 As shown, the lifting mechanism is composed of a winch unit 5 and a flexible cable 8. The winch unit 5 has two output ends, one end of the flexible cable 8 is wound around the first output end, and the other end is wound around the guide member 10 fixed on the basic frame 1 and then wound around the second output end, ensuring that the flexible cable 8 can be smoothly extended or shortened under the drive of the winch. The fastener 9 is connected to the flexible cable 8 between the winch and the guide member 10. Through the extension or shortening of the flexible cable 8, the fastener 9 can drive the node connected thereto to rise and fall. The smooth lifting and lowering of the node is achieved, so that the change in the volume of the cage 2 can be accurately controlled. The stability and reliability of the lifting operation are improved.

[0033] With the development of the aquaculture industry and the continuous changes in aquaculture needs, the requirements for aquaculture equipment are becoming higher and higher. The design of the lifting mechanism is born to meet these needs. It can not only improve aquaculture efficiency and quality, but also reduce aquaculture costs and risks.

[0034] During the breeding process, as the seafood grows and the seasons change, the breeding environment needs to be constantly adjusted. Through the lifting mechanism, the breeder can flexibly adjust the volume and height of the cage 2 to adapt to different breeding needs.

[0035] The lifting mechanism also makes fishing operations more convenient. When it is necessary to catch seafood, the farmer can lift the net cage 2 to a suitable height through the lifting mechanism, and then use fishing tools to catch it. It not only improves the fishing efficiency, but also reduces the difficulty and cost of fishing. In the event of an emergency, the lifting mechanism can also be used for emergency treatment. For example, when the net cage 2 fails, it can be quickly repaired through the lifting mechanism. In this embodiment, the lifting mechanism fully considers the particularity of the marine environment and responds to various challenges by improving stability and ease of operation. The lifting mechanism drives the lifting and lowering of the net cage 2, so that the fishing and breeding processes have special advantages such as precise control, high stability, and easy operation, and can flexibly adjust the breeding environment, facilitate fishing operations, emergency treatment and other special purposes.

[0036] In this embodiment, Figure 2 As shown, the hoisting unit 5 includes a first hoist 51 and a second hoist 52. The first hoist 51 and the second hoist 52 have opposite running directions, so that when the first hoist 51 reels the flexible rope 8, the second hoist 52 releases the flexible rope 8. At the same time, the flexible rope 8 is divided into two sections, one section is the first flexible rope 81, and the other section is the second flexible rope 82. One end of the first flexible rope 81 is wound around the output end of the first hoist 51, and the other end is connected to the fastener 9 after passing through the guide member 10; one end of the second flexible rope 82 is wound around the output end of the second hoist 52, and the other end is connected to the fastener 9. When the first hoist 51 reels the first flexible rope 81, the second hoist 52 releases the second flexible rope 82, so that the fastener 9 drives the node to descend, and vice versa, the fastener 9 can drive the node to rise.

[0037] The hoisting unit 5 is installed above the net box 2, and a guide wheel 6 can be provided to guide the first flexible rope 81 and the second flexible rope 82. The guide wheel 6 can adopt a double-groove fixed pulley set, and the guide member 10 can adopt a groove wheel as a fixed pulley for the first flexible rope 81 to pass around. The first flexible rope 81 and the second flexible rope 82 can both adopt flexible structures such as flexible steel cables and wire ropes to meet the requirements of deformation and traction during traction, and ensure stable operation during the lifting process.

[0038] like Figure 2 As shown, the base frame 1 is connected with a guide rod 7 which is parallel to the catheter frame 101. The fastener 9 is sleeved outside the guide rod 7 and can slide along the guide rod 7 under the drive of the flexible cable 8. The guide rod 7 provides a stable path for the movement of the fastener 9, prevents the fastener 9 from deflecting or shaking during the lifting process, improves the accuracy and stability of the lifting operation, and can use the guide rod 7 to constrain the range of movement of the fastener 9 and the connected node, avoiding the problems of entanglement, hooking and damage of the cage 2 caused by excessive node offset.

[0039] like Figure 3As shown, the fastener 9 adopts an annular structure. The fastener 9 includes a first half-ring 91 and a second half-ring 93 that are joined together. A fixed shaft 92 is connected between the first half-ring 91 and the second half-ring 93, so that the fastener 9 forms a structure in the shape of a Chinese character 'Ri'. The first half-ring 91 and the fixed shaft 92 form a first hole, and the first hole can allow the guide rod 7 to pass through, thereby ensuring that the fastener 9 can slide along the guide rod 7, restricting the movement range of the fastener 9 and guiding it. The second half-ring 93 and the fixed shaft 92 form a second hole, and the second hole can cooperate with the cable buckle 11, so that a connection is established between the fastener 9 and the cable buckle 11.

[0040] As Figure 1 and Figure 2 As shown, a working platform 3 is installed on the foundation frame 1, and the working platform 3 is arranged circumferentially corresponding to the top opening of the net cage 2. The lifting mechanism is installed on the working platform 3. The working platform 3 provides a safe working environment for the operator, making the installation and debugging of the lifting mechanism more convenient, and at the same time facilitating daily maintenance and repair.

[0041] As Figure 1 and Figure 2 As shown, the bottom cables 24 on adjacent sides of the bottom net 23 are connected and then connected to the side cables 21 to form nodes, and nodes are respectively formed at each corner position of the bottom net 23. The cable buckles 11 are installed on the nodes to connect the fasteners 9. The design of the nodes enables the bottom net 23 to be lifted and lowered smoothly, while ensuring the structural stability of the net cage 2. The design of the cable buckles 11 makes the connection between the fasteners 9 and the nodes more firm and reliable, preventing detachment or loosening during the lifting process.

[0042] Float balls 12 and sinkers 13 are installed on the bottom cables 24. The fastener 9 can be moved to the top opening of the net cage 2 under the drive of the lifting mechanism. The settings of the float balls 12 and the sinkers 13 help to maintain the balance and stability of the bottom net 23, preventing the bottom net 23 from shifting or tilting due to external factors such as water flow. The fastener 9 can be moved to the top opening of the net cage 2, which is convenient for fishing operations.

[0043] As Figure 1 As shown, the foundation frame 1 includes multiple jacket frames 101 circumferentially distributed around the net cage 2, and the support frame 102 is a cross-bar group. There are four jacket frames 101, which are distributed obliquely relative to the vertical direction, and the side cables 21 are distributed corresponding to the jacket frames 101 one by one. The optimized design of the jacket frames 101 and the support frame 102 improves the stability and load-bearing capacity of the foundation frame 1. The obliquely distributed jacket frames 101 and the corresponding side cables 21 make the structure of the net cage 2 more balanced, improving the overall stability and wave resistance.

[0044] The characteristic of the step-type frame structure is that its bottom surface area is larger than the top surface area, forming a shape that gradually shrinks from bottom to top. The fastener 9 is connected to the winch unit 5 through the flexible rope 8, and can move up and down along the guide rod 7 (or other guide structure) under the drive of the winch unit 5. The nodes are connected at the intersection of the bottom rail 24 and the side rail 21, and the fastener 9 is connected to these nodes, so that the entire bottom net 23 can be driven to rise and fall. When the bottom net 23 is close to the bottom of the basic frame 1, due to the characteristics of the step-type frame structure, the fastener 9 is distributed at a position with a larger bottom surface area; when the bottom net 23 gradually rises, the fastener 9 also rises, and due to the gradual contraction of the step-type frame, the fastener 9 gradually moves to a position with a smaller top surface area.

[0045] Since the bottom surface area of ​​the terraced frame structure is larger than the top surface area, as the bottom net 23 rises, the fasteners 9 (and the nodes and bottom net 23 parts connected thereto) will gradually move from the large area to the small area. This movement process causes the opening of the bottom net 23 relative to the base frame 1 to gradually decrease, forming a gradually closing structure. The gradually closing structure is very beneficial in fish collection and fishing operations because it can gradually reduce the range of activities of farmed seafood, making fishing operations more centralized and efficient.

[0046] In this embodiment, the stability and reliability of the lifting operation are improved, and the precise control of the volume of the cage 2 is achieved. The stability and wind and wave resistance of the cage 2 structure are enhanced, and the safety of the cultured marine products is ensured. A safe working environment and convenient maintenance conditions are provided, and the difficulty and cost of operation are reduced. The fishing efficiency is improved, and the needs of deep-sea aquaculture are met.

[0047] Example 2 In another typical embodiment of the present invention, Figure 1-Figure 3 As shown, a working method of an offshore wind turbine foundation integrated with aquaculture cages is provided, using the offshore wind turbine foundation integrated with aquaculture cages as in Example 1.

[0048] A working method for an offshore wind turbine foundation integrated with aquaculture cages, comprising: Install the net box 2 in the basic frame 1, and install the retractable assembly so that the lifting mechanism of the retractable assembly is connected to the nodes of the net box 2 through the fasteners 9; The lifting mechanism lowers the node so that the bottom net 23 falls to the bottom, and a breeding space is formed inside the net box 2; The lifting mechanism elevates the nodes to raise the bottom net 23, so that the volume of the net box 2 gradually decreases, reducing the range of the breeding space for fishing; After the fishing is completed, the lower node causes the bottom net 23 to fall, and the inner volume of the cage 2 gradually expands to form a breeding space.

[0049] When the node is lifted, the node gradually approaches the vertical center axis of the basic frame 1, and the overlapping and hanging side nets 22 are located outside the bottom net 23. When fishing is needed, the volume of the net cage 2 is reduced by lifting the node, and the fish are concentrated in a relatively small area, which greatly simplifies the fishing process. The design of the side nets 22 overlapping and hanging outside the bottom net 23 avoids the possibility of fish escaping from the side nets 22 during the fishing process, reduces the adverse effect of the sagging side nets 22 on the fish pump when fishing with a fish pump, reduces the interference of the side nets 22 on the operation of the fish pump, and further improves the success rate and efficiency of fishing.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An offshore wind turbine foundation with integrated aquaculture cages, characterized in that: include: The foundation frame includes a conductor frame and a support frame, and the conductor frames are connected to the support frames to form a terraced frame structure; The cage is a box-shaped structure with an open top formed by side nets and a bottom net. The sides of the bottom net are connected to bottom wires respectively. The side nets at the junction of adjacent sides of the cage are connected to side wires. Each side wire extends vertically along the basic frame to connect to the bottom wire to form a node. The retractable assembly includes a lifting mechanism and fasteners. The output end of the lifting mechanism is connected to the node through the fastener to drive the node to rise and fall relative to the top opening of the net box to change the volume of the net box.

2. The offshore wind turbine foundation of the integrated aquaculture cage according to claim 1, characterized in that: The lifting mechanism includes a winch unit and a flexible rope, a guide member is fixed to a base frame, one end of the flexible rope is wound around a first output end of the winch unit, and the other end of the flexible rope is wound around a second output end of the winch unit after passing around the guide member, and a fastener is connected to the flexible rope between the winch unit and the guide member.

3. The offshore wind turbine foundation of the integrated aquaculture cage according to claim 2, characterized in that: The basic frame is connected with a guide rod which is distributed parallel to the catheter frame. The fastener is sleeved outside the guide rod and can slide along the guide rod under the drive of the flexible cable.

4. The offshore wind turbine foundation of the integrated aquaculture cage according to claim 1, characterized in that: A working platform is installed on the basic frame. The working platform is arranged circumferentially corresponding to the top opening of the net box, and the lifting mechanism is installed on the working platform.

5. The offshore wind turbine foundation of the integrated aquaculture cage according to claim 1, characterized in that: The bottom wires on adjacent sides of the bottom net are connected and then connected to the side wires to form a node. Each corner position of the bottom net forms a node, and rope buckles are installed at the nodes to connect the fasteners.

6. The offshore wind turbine foundation of the integrated aquaculture cage according to claim 5, characterized in that: A float and a sinker are installed on the bottom frame, and the fastener can be moved to the top opening of the cage under the drive of the lifting mechanism.

7. The offshore wind turbine foundation of the integrated aquaculture cage according to claim 1, characterized in that: The basic frame includes a plurality of pipe frames distributed circumferentially around the net box, and the support frame is a cross rod group.

8. The offshore wind turbine foundation of the integrated aquaculture cage according to claim 7, characterized in that: The catheter racks are provided with four and are distributed obliquely relative to the vertical direction, and the side rails are distributed in a one-to-one correspondence with the catheter racks.

9. A working method of an offshore wind turbine foundation integrated with aquaculture cages, using the offshore wind turbine foundation integrated with aquaculture cages as claimed in any one of claims 1 to 8, characterized in that: include: Install the net box in the basic frame, and install the retractable assembly, so that the lifting mechanism of the retractable assembly is connected to the nodes of the net box through fasteners; The lifting mechanism lowers the nodes to make the bottom net fall to the bottom, and a breeding space is formed inside the cage; The lifting mechanism elevates the nodes to raise the bottom net, which gradually reduces the volume of the cage and reduces the scope of the breeding space for fishing; After the fishing is completed, the lower node causes the bottom net to fall, and the volume of the cage content gradually expands to form a breeding space.

10. The working method of the offshore wind turbine foundation integrated with aquaculture cage according to claim 9, characterized in that: When the node is lifted, the node gradually approaches the vertical center axis of the basic frame, and the overlapping and hanging side nets are located outside the range of the bottom net.

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