Flexible deep sea truss aquaculture net cage

Abstract

The present application belongs to the technical field of marine culture, and particularly relates to a flexible deep-sea truss culture net cage, which comprises a flexible net cage system, a bunker barrel system is arranged in the middle of the flexible net cage system, an overwater suspended corridor assembly is arranged between the top of the flexible net cage system and the top of the bunker barrel system, and an anchor cable system is arranged on the outer side of the circumference of the flexible net cage system. In the present application, the flexible net cage system is designed, wherein the bottom annular thick support pipe and the stand are filled with plasticity filling material to increase the weight of the culture net cage, reduce the gravity center of the net cage, and improve the safety in the process of launching and the stability in actual operation. The remaining support pipes, support members, stands in the bunker barrel system, and transverse annular support pipes are filled with seawater to assist the launching of the net cage and simplify the counterweight. The overall structural design makes the net cage have the advantages of seawater corrosion resistance, firm structure, ability to withstand large waves and seawater impact, certain water permeability, and ability to maintain seawater flow.

Description

Technical Field

[0001] This invention relates to the field of marine aquaculture technology, and in particular to a flexible deep-sea truss aquaculture cage. Background Technology

[0002] Currently, marine aquaculture is facing increasingly severe challenges. In nearshore aquaculture areas, excessive stockpiling and overfishing have led to resource depletion, ecological degradation, and declining aquaculture efficiency. This situation has prompted deep-sea aquaculture to gradually become an important direction for the development of marine aquaculture. Deep-sea areas possess abundant natural resources and vast spaces, effectively alleviating resource pressure on nearshore areas and providing sustainable aquaculture conditions. Therefore, deep-sea aquaculture is becoming an important trend in the marine aquaculture industry, representing a new frontier in marine fisheries development. However, in the vast, deep sea environment far from land, aquaculture cages will be subjected to harsh sea conditions, which places stringent requirements on their performance: the materials used in the cages must be resistant to seawater corrosion, ensuring long-term normal use without damage in the harsh environment of the deep sea; the structure of the cages must be able to withstand the impact of waves and ocean currents to maintain normal operation, thus requiring a robust and reliable structure; the cages will deform significantly under the impact of seawater, therefore they need to have good deformation capacity to ensure that the overall structure will not be damaged under the impact of waves; the cages need to have a certain degree of permeability to ensure normal circulation of seawater and prevent the formation of stagnant water zones within the cages, which would affect aquaculture efficiency.

[0003] In the current marine aquaculture sector, all-steel structures are commonly used as the main truss of aquaculture cages. However, these cages are expensive to build and maintain, and have poor resistance to seawater corrosion, making them susceptible to corrosion and loss of structural performance over long-term use. Furthermore, the high rigidity of these spatial cage structures necessitates sophisticated installation and hoisting equipment, resulting in complex construction processes and significant operational difficulties, which greatly restricts their large-scale application in the harsh environments of deep-sea areas. Summary of the Invention

[0004] Based on the existing technical problems in the background technology, the present invention proposes a flexible deep-sea truss aquaculture cage.

[0005] The present invention proposes a flexible deep-sea truss aquaculture cage, including a flexible cage system, a feed bin system in the middle of the flexible cage system, and a floating walkway component between the top of the flexible cage system and the top of the feed bin system. An anchor cable system is provided on the outer circumference of the flexible cage system. The silo system includes several columns and several horizontal annular support pipes, and the columns and the horizontal annular support pipes are fixedly connected. The columns are distributed at equal angles with the horizontal annular support pipes as the center. The horizontal annular support pipes are inserted through the columns and distributed at equal distances. The columns and the horizontal annular support pipes form the frame of the silo system. The flexible cage system includes several columns, several support pipes, several support components, several bottom annular thin support pipes and bottom longitudinal support pipes. The upper and lower ends of the columns are fixedly connected to the support pipes. Support components are fixedly installed between two adjacent columns. Several bottom annular thin support pipes and several bottom longitudinal support pipes are combined to form the bottom of the flexible cage system. Several support pipes and several columns are combined to form the frame of the flexible cage system. Several fixed connecting components are fixedly installed on the columns. The anchor cable system includes several hemp ropes, several chains, several trapezoidal blocks, and several counterweights. One end of each hemp rope is fixedly connected to a column, one end of each chain is fixedly connected to a hemp rope, and the other end of each chain is fixedly connected to a trapezoidal block. Several counterweights are fixedly connected to the chain and are distributed at equal intervals along its length. The floating walkway assembly includes a surrounding walkway and six branch walkways. The surrounding walkway is located at the top of the flexible cage system, and its bottom end is fixedly connected to the top of several columns. The two ends of the branch walkways are respectively fixedly connected to the horizontal annular support pipes at the top of the surrounding walkway and the hopper system. The six branch walkways are distributed at equal angular intervals around the hopper system. Both the surrounding walkway and the branch walkways are composed of several main poles and several crossbars fixedly connected together. The crossbars are distributed at equal distances between the main poles.

[0006] Preferably, the support tube includes a top annular thick support tube and a bottom annular thick support tube, the bottom annular thick support tube being located on the outer ring of the bottom annular thin support tube, and the top annular thick support tube being located at the bottom end of the corridor.

[0007] Preferably, a plurality of bottom longitudinal support pipes at equal angles are fixedly installed between the bottom annular coarse support pipe and the transverse annular support pipe located at the bottom end of the silo system, and a plurality of bottom annular thin support pipes are fixedly installed between the plurality of bottom longitudinal support pipes.

[0008] Preferably, the support components include diagonal support components, transverse support components, and mesh support components. The transverse support components are fixedly connected to the uprights. The mesh support components are located on both sides of the transverse support components and are fixedly connected to the fixed connection components provided on the uprights. The inner layer of the mesh support components is laid between the top of the bottom annular thin support tube and the inner side of the bottom annular thick support tube, and the outer side of the transverse annular support tube. The outer layer of the mesh support components is laid on the outer side of the flexible cage system and its bottom end. A sleeve system is provided between several of the diagonal support components and the transverse support components.

[0009] Preferably, the bottom annular thick support pipe and the column are filled with viscoplastic filler material, and the inclined support, the transverse support pipe, the bottom annular thin support pipe, the bottom longitudinal support pipe, and the column and transverse annular support pipe of the silo system are filled with seawater.

[0010] Preferably, the sleeve system includes several flexible sleeves, horizontal sleeves, several oblique sleeves, and sleeve connecting components. Several flexible sleeves are located at the four corners of the horizontal sleeves. The horizontal sleeves are fixedly sleeved with the horizontal support members. The oblique sleeves are fixedly installed at the connection between the column and the support pipe. The two ends of the oblique support members are respectively sleeved with the flexible sleeves and the oblique sleeves. Sleeve connecting components are fixedly installed on the outside of several flexible sleeves and horizontal sleeves.

[0011] Preferably, the columns, horizontal annular support pipes, columns, support pipes, floating walkway components, fixed connection components, inclined support components, horizontal support components, bottom annular thin support pipes, flexible sleeves, horizontal sleeves, inclined sleeves, sleeve connection components, and bottom longitudinal support pipes are all made of HDPE.

[0012] Preferably, the hemp rope is a high-strength polypropylene monofilament cable, and the netting support is a special polyester monofilament and polyethylene twisted net.

[0013] Preferably, the flexible sleeve includes an inclined sleeve, a locking block, a spherical sleeve, a spherical locking block, and a flexible filling material. The spherical sleeve is located at the four corners of the transverse sleeve and is fixedly connected to the transverse sleeve. One end of the inclined sleeve is fixedly connected to the spherical locking block. One end of the inclined support is located inside the inclined sleeve. The locking block is fixedly installed to one end of the inclined support and is located inside the inclined sleeve. The flexible filling material fills the inside of the inclined sleeve and fills the space between the locking block and the inclined sleeve, as well as between the spherical locking block and the inclined sleeve.

[0014] The beneficial effects of this invention are as follows: 1. This invention proposes a flexible deep-sea truss aquaculture cage. The cage system comprises support pipes, support components, a bottom annular thin support pipe, a bottom longitudinal support pipe, and columns with fixed connecting components, forming the cage frame. The bottom annular thick support pipe and columns are filled with a viscoplastic filler material to increase the cage's weight, lower its center of gravity, and improve its safety during deployment and stability in actual operation. This prevents the cage from overturning due to ocean currents and waves. The viscoplastic filler material possesses a certain degree of hardness and rigidity while also exhibiting flexibility and ductility, allowing for deformation and protecting the overall structure of the cage from damage. The remaining support pipes, support components, columns in the feed hopper system, and the transverse annular support pipe are filled with seawater to assist in deployment and provide simple counterweighting. Furthermore, the overall structural design makes the cage resistant to seawater corrosion, structurally robust, able to withstand large waves and seawater impacts, and permeable to maintain seawater flow, preventing water pollution within the cage and effectively preventing farmed animals from escaping into the wild.

[0015] 2. This invention proposes a flexible deep-sea truss aquaculture cage, which incorporates an HDPE truss system. Compared to traditional steel truss structures, HDPE trusses offer superior corrosion and moisture resistance, along with high tensile strength, enabling them to withstand greater tensile and compressive forces. This allows them to better adapt to the harsh marine environment. Furthermore, the relatively lightweight high-density polyethylene material reduces the cage's weight and installation difficulty. A sleeve system is also included to effectively protect truss connections, enhancing the safety of critical nodes and reducing the risk of damage to weak points. The flexible sleeve design at the nodes improves the cage's flexibility and stability, providing a degree of bending deformation capability when exposed to waves and ocean currents. This effectively enhances the overall structural stability of the cage, reducing the risk of cage breakage and fish escape. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a flexible deep-sea truss aquaculture cage according to the present invention; Figure 2 This is a three-dimensional structural diagram of a flexible deep-sea truss aquaculture cage system according to the present invention. Figure 3 This is an enlarged structural schematic diagram of the sleeve system of a flexible deep-sea truss aquaculture cage according to the present invention; Figure 4 This is a schematic diagram of the flexible sleeve of a flexible deep-sea truss aquaculture cage according to the present invention; Figure 5 This is a schematic diagram of the internal structure of the sleeve connection component of a flexible deep-sea truss aquaculture cage according to the present invention; Figure 6This is a structural schematic diagram of a floating corridor component for a flexible deep-sea truss aquaculture cage according to the present invention; Figure 7 This is a schematic diagram of the external mesh frame model of a flexible deep-sea truss aquaculture cage according to the present invention; Figure 8 This is a partial grid diagram of the watershed profile of a flexible deep-sea truss aquaculture cage according to the present invention; Figure 9 This is a schematic diagram of the structural deflection of a flexible deep-sea truss aquaculture cage under the most unfavorable working conditions according to the present invention.

[0017] In the diagram: 1. Silo system, 11. Columns, 12. Horizontal ring support pipe; 2 Flexible cage system, 21 Column, 22 Support pipe, 221 Top annular thick support pipe, 222 Bottom annular thick support pipe, 23 Support component, 231 Diagonal support component, 232 Horizontal support component, 233 Netting support component, 24 Bottom annular thin support pipe, 25 Floating walkway component, 251 Surrounding walkway, 252 Branch walkway, 253 Main pole, 254 Horizontal bar, 26 Bottom longitudinal support pipe; 3 Anchor cable system, 31 Hemp rope, 32 Chain, 33 Trapezoidal block, 34 Counterweight block; 4. Fixed connection components; 5. Sleeve system, 51. Flexible sleeve, 511. Inclined sleeve, 512. Clamping block, 513. Spherical sleeve, 514. Spherical clamping block, 515. Flexible filling material, 52. Transverse sleeve, 53. Inclined sleeve, 54. Sleeve connection component. Detailed Implementation

[0018] Reference Figure 1-6 A flexible deep-sea truss aquaculture cage includes a flexible cage system 2, a feed bin system 1 in the middle of the flexible cage system 2, and a floating walkway component 25 between the top of the flexible cage system 2 and the top of the feed bin system 1. An anchor cable system 3 is provided on the outer circumference of the flexible cage system 2. The flexible cage system 2 is mainly used to support the aquaculture organisms, the anchor cable system 3 is mainly used to fix the cage, and the sleeve system 5 is mainly used to protect the connection between the column 21 and the support 23 to improve the safety of key nodes and the overall stability of the cage. The connection of the anchor cable system 3 is generally controlled by a ship crane to penetrate and fix it to the seabed, so that the entire cage is fixed in a designated position and can improve the cage's resistance to disturbance during use. The silo system 1 includes several columns 11 and several transverse annular support pipes 12. The columns 11 and the transverse annular support pipes 12 are fixedly connected. The columns 11 are distributed at equal angles with the transverse annular support pipes 12 as the center. The transverse annular support pipes 12 are inserted through the columns 11 and distributed at equal distances. The columns 11 and the transverse annular support pipes 12 form the frame of the silo system 1. The flexible cage system 2 includes several columns 21, several support pipes 22, several support components 23, several bottom annular thin support pipes 24 and bottom longitudinal support pipes 26. The upper and lower ends of the columns 21 are fixedly connected to the support pipes 22. Support components 23 are fixedly installed between two adjacent columns 21. The several bottom annular thin support pipes 24 and several bottom longitudinal support pipes 26 are combined to form the bottom of the flexible cage system 2. The several support pipes 22 and several columns 21 are combined to form the frame of the flexible cage system 2. Several fixed connecting components 4 are fixedly installed on the columns 21. The silo system 1 is connected to the flexible cage system 2 through the bottom longitudinal support pipes 26 and the branch corridor 252. The internal structure of the silo system 1 can be modified according to different operation requirements and working conditions. The anchoring system 3 includes several hemp ropes 31, several chains 32, several trapezoidal blocks 33, and several counterweights 34. One end of each hemp rope 31 is fixedly connected to the post 21, one end of each chain 32 is fixedly connected to the hemp rope 31, and the other end of each chain 32 is fixedly connected to the trapezoidal block 33. The counterweights 34 are fixedly connected to the chains 32 and are distributed at equal intervals along their length. A fishing boat is used to pull the trapezoidal blocks 33 further away, so that the hemp ropes 31 and chains 32 are taut as much as possible. Then, the system is allowed to sink naturally, and the trapezoidal blocks 33 penetrate downwards and are fixed to the sea. At the bottom, the trapezoidal blocks 33 provide tensile and lateral resistance through close contact and anchoring with the seabed, suppressing the displacement of the net cage. By enhancing the adhesion and friction between the trapezoidal blocks 33 and the seabed, they resist the disturbance of the net cage position by external hydrodynamic forces, ensuring that the net cage is fixed in the designated position. In still water conditions, the counterweights 34 in the anchor cable system 3 increase the total weight and sinking force of the net cage, offsetting part of the buoyancy of the net cage, suppressing the influence of external forces on the net cage, and ensuring that the net cage is stable in the designated position without drifting or tilting. The floating corridor component 25 includes a surrounding corridor 251 and six branch corridors 252. The surrounding corridor 251 is located at the top of the flexible cage system 2, and its bottom end is fixedly connected to the top of several columns 21. The two ends of the branch corridors 252 are fixedly connected to the horizontal annular support pipes 12 at the top of the surrounding corridor 251 and the hopper system 1, respectively. The six branch corridors 252 are distributed at equal angles around the hopper system 1. Both the surrounding corridor 251 and the branch corridors 252 are composed of several main poles 253 and several crossbars 254 fixedly connected. The crossbars 254 are distributed at equal distances between the main poles 253. During cleaning or routine maintenance, the current cage can be cleaned and maintained along the floating corridor component 25.

[0019] In this invention, a plurality of bottom longitudinal support pipes 26 at equal angles are fixedly installed between the bottom annular coarse support pipe 222 and the transverse annular support pipe 12 located at the bottom end of the silo system 1, and a plurality of bottom annular thin support pipes 24 are fixedly installed between the plurality of bottom longitudinal support pipes 26. Multiple bottom longitudinal support pipes 26 at equal angles are fixedly installed between the inner side of the bottom annular thick support pipe 222 and the transverse annular support pipe 12 located at the bottom of the silo system 1, and multiple bottom annular thin support pipes 24 are fixedly installed between the multiple bottom longitudinal support pipes 26. The support component 23 includes an inclined support component 231, a transverse support component 232, and a net support component 233. The inclined support component 231 and the transverse support component 232 are installed on the sides of the net cage to reinforce the overall structure and help resist the impact of external forces such as waves and ocean currents, thereby ensuring the stability of the net cage structure. The net support component 233 surrounds and wraps around the frame of the flexible net cage system 2. The net support component 233 has strong water permeability, which helps prevent water pollution, provides good growth conditions for the aquaculture environment, and effectively prevents the escape of farmed animals. The transverse support component 232 is fixedly connected to the column 21. The net support component 233 is located on both sides of the transverse support component 232 and is fixedly connected to the fixed connection component 4 installed on the column 21. The inner layer of the net support component 233 is laid inside and at the bottom of the flexible net cage system 2. Between the top of the annular thin support tube 24 and the inner side of the bottom annular thick support tube 222, and the outer side of the transverse annular support tube 12, the outer layer of the net support component 233 is laid on the outer side and bottom of the flexible net cage system 2. The net support component 233 is attached to the inner and outer sides of the net cage body. There is no net support component 233 on the top surface of the net cage. When the net cage is operating normally, the water does not completely submerge the net cage. The floating corridor component 25 and the top annular thick support tube 221 are above the water surface. This part can prevent the farmed fish from jumping out, so there is no net support component 233 covering the top surface. Only the sides and bottom of the net cage are covered by net support component 233. A sleeve system 5 is set between one end of several inclined support components 231 and the transverse support component 232. A sleeve system 5 is also set at the other end of the inclined support component 231 and the connection between the column 21 and the support tube 22. The bottom annular thick support pipe 222 and column 21 are filled with viscoplastic filler material, and the inclined support 231, the transverse support pipe 232, the bottom annular thin support pipe 24, the bottom longitudinal support pipe 26, and the column 11 and transverse annular support pipe 12 of the silo system 1 are filled with seawater. The sleeve system 5 includes several flexible sleeves 51, horizontal sleeves 52, several oblique sleeves 53, and sleeve connecting members 54. The design of the flexible sleeves 51 enhances the flexibility of the structure, allowing the cage to bend under the impact of waves and ocean currents, rather than remaining rigid, thereby improving the overall flexibility of the cage. Several flexible sleeves 51 are located at the four corners of the horizontal sleeves 52, and the horizontal sleeves 52 are fixedly sleeved with the horizontal support members 232. The oblique sleeves 53 are fixedly installed at the connection between the column 21 and the support pipe 22. The two ends of the oblique support members 231 are respectively sleeved with the flexible sleeves 51 and the oblique sleeves 53. Sleeve connecting members 54 are fixedly installed on the several flexible sleeves 51 and the horizontal sleeves 52. 4. The lattice design ensures structural stability while reducing the weight of the components. During normal operation of the cage, when the upright 21 is vertically displaced due to wave impact, the inclined support 231, which is fixedly connected to the upright 21, will follow the corresponding displacement of the upright 21. At this time, the flexible filling material 515 in the flexible sleeve 51 will provide a certain amount of thrust and tension, giving the inclined support 231 a certain buffer, thereby ensuring the normal operation of the cage. The spherical block 514 can provide a certain angle for the inclined support 231, further enhancing the overall flexibility of the cage and reducing the risk of damage caused by external forces during use. The following components are used: column 11, horizontal annular support pipe 12, column 21, support pipe 22, floating walkway component 25, fixed connection component 4, inclined support component 231, horizontal support component 232, bottom annular thin support pipe 24, flexible sleeve 51, horizontal sleeve 52, inclined sleeve 53, sleeve connection component 54, and bottom longitudinal support pipe 26. HDPE is used in all these components. HDPE has excellent corrosion resistance and leak-proof performance. Furthermore, HDPE has high tensile strength, offering not only good economic benefits but also stable and reliable joints. As an electrical insulator, HDPE resists corrosion from acids, alkalis, and salts, and will not rust. The phenomenon of chemical corrosion; HDPE components have good sealing performance and low permeability, which can ensure the durability of the cages; HDPE is flexible, meaning it can bend under the action of waves rather than remain rigid, and has strong tensile strength and excellent flexibility. The truss structure can fully utilize the tensile and compressive properties of HDPE pipes, improving the load-bearing capacity of the structure; the truss system allows for a larger span in the structure, and the relatively light material of HDPE pipe trusses can reduce the self-weight of the structure, which is conducive to the normal use of the cages, and is also easy to handle and install, requiring less manpower and equipment. It can also withstand a certain degree of bending during installation, reducing the difficulty of installation; The hemp rope 31 is made of high-strength polypropylene monofilament cable, and the net support 233 is made of special polyester monofilament and polyethylene twisted net. The flexible sleeve 51 includes an inclined sleeve 511, a locking block 512, a spherical sleeve 513, a spherical locking block 514, and a flexible filler material 515. The spherical sleeve 513 is located at the four corners of the transverse sleeve 52 and is fixedly connected to the transverse sleeve 52. One end of the inclined sleeve 511 is fixedly connected to the spherical locking block 514. One end of the inclined support member 231 is located inside the inclined sleeve 511. The locking block 512 is fixedly installed to one end of the inclined support member 231 and is located inside the inclined sleeve 511. The flexible filler material 515 fills the sleeve. Inside the inclined sleeve 511, and with the flexible filling material 515 filling between the locking block 512 and the inclined sleeve 511, as well as between the spherical locking block 514 and the inclined sleeve 511, the flexible filling material 515 can alleviate the displacement of the inclined support 231 under the impact of sea waves, increase the flexibility and bending deformation capacity of the structure, unload part of the impact force of sea waves, improve the safety of the node, and the design of the flexible filling material 515 can effectively reduce the stiffness of the flexible deep-sea flexible cage system 2, reducing the possibility of damage to the overall structure of the cage.

[0020] Working Principle: A flexible net cage system was designed. The frame of the aquaculture net cage is composed of support pipes 22, support components 23, bottom annular thin support pipes 24, bottom longitudinal support pipes 26, and columns 21 equipped with fixed connecting components 4. Viscoplastic filler material is injected into the bottom annular thick support pipes 222 and columns 21 to increase the weight of the aquaculture net cage, lower its center of gravity, improve the safety of the aquaculture net cage during deployment and its stability in actual operation, and prevent the aquaculture net cage from overturning due to the impact of ocean waves and currents. Furthermore, the viscoplastic filler material has a certain degree of hardness and rigidity. It also possesses a certain degree of flexibility and extensibility, allowing for a certain degree of deformation, thus protecting the overall structure of the net cage from damage. The remaining support pipes 22, support components 23, the columns 11 in the feed bin system 1, and the transverse annular support pipes 12 are filled with seawater to assist in the deployment of the net cage and provide simple counterweight. In addition, the overall structural design makes the net cage resistant to seawater corrosion, structurally robust, able to withstand the impact of large waves and seawater, and has a certain degree of permeability to maintain the flow of seawater, avoid water pollution inside the net cage, and effectively prevent farmed animals from escaping into the wild. An HDPE truss system was designed, which, compared to traditional steel truss structures, offers superior corrosion and moisture resistance, as well as high tensile strength, enabling it to withstand greater tension and pressure. This allows it to better adapt to harsh marine environments. Furthermore, the relatively lightweight high-density polyethylene material reduces the weight of the net cages and simplifies installation. A sleeve system was also designed to effectively protect truss connections, enhancing the safety of critical nodes and reducing the risk of damage to weak points. The flexible sleeves 51 at the nodes improve the flexibility and stability of the net cages, providing them with a certain degree of bending deformation capacity when facing waves and ocean currents. This effectively enhances the overall structural stability of the net cages and reduces the risk of damage and fish escape.

[0021] Reference Figures 7-9 A flexible deep-sea truss aquaculture cage is described. To further analyze the reliability of the aforementioned flexible deep-sea truss aquaculture cage, fluid-structure interaction numerical modeling and analysis are performed. By establishing a finite element model of the cage, the deformation and stress of the cage during actual operation are simulated based on the seawater flow velocity in the actual water conditions. The steps include: Step 1: Based on the above structural arrangement of the net cage, the proposed net cage perimeter is 197.82m, the underwater height is approximately 10m, and the total water capacity is 30960m³. 3 Referring to the "Polyethylene (PE) Piping Systems for Water Supply" (GB / T13663.2-2018), the selected round pipe dimensions are shown in the table below.

[0022] Table 1 Main Structure Dimensions of the Garbage

[0023] Step 2: Use finite element software to establish a geometric model of the flexible deep-sea truss aquaculture cage, such as... Figure 7 As shown, the model includes a silo system 1, a flexible cage system 2, and an anchor cable system 3. After completion, the geometric model is meshed, and temporary supports for onshore assembly are simulated by applying corresponding constraints. Finally, an inertial force with the same direction of structural gravitational acceleration is applied to the model to simulate the structure's self-weight. The maximum stress of the structure occurs at the junction of the upper layer of the silo platform, the pedestrian walkway, and the silo platform column, with a maximum stress of 14.58 MPa, which is lower than the design value of the tensile strength of the material used, 22 MPa. The maximum deflection of the structure occurs in the middle section of the pedestrian walkway, with a value of 705.87 mm and a deflection-to-span ratio of 0.025.

[0024] Step 3: The actual operating conditions of the net cages involve seawater flow velocities ranging from 2.0 m / s to 2.3 m / s. To simulate the deformation and stress of the net cages during actual operation, fluid simulation software is used to solve for the watershed flow within the net cages. Figure 8-9As shown, a watershed with a height * length * width of 14.6m * 154.9m * 154.9m was obtained through Boolean operations. The watershed was then meshed, and boundary conditions were set. The positive x-axis surface of the watershed was the velocity inlet, the negative x-axis surface was the pressure outlet, and the remaining surfaces of the watershed were the walls. To simulate the most unfavorable working condition of the cage in actual operation, a water flow velocity of 3m / s was used to analyze the deformation and structural stress of the cage under the most unfavorable condition. Under the 3m / s flow velocity condition, the cable stress was 87.266KN, which was less than the cable's breaking strength of 1185KN. The maximum deformation of the main structure of the cage was 2.98m, which occurred at the main pole of the pedestrian crossing. The maximum deflection of the pedestrian crossing was 2.98m, and the deflection-to-span ratio was 0.1049. The maximum stress of the remaining parts was all below the material strength limit.

[0025] Simulation analysis of the above-mentioned flexible deep-sea truss aquaculture cage using finite element software shows that the stress on each structure of the cage is less than the tensile strength limit of the material under different working conditions, and there is sufficient safety margin, further verifying the reliability of the cage.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flexible deep-sea truss aquaculture cage, comprising a flexible cage system (2), characterized in that, The flexible cage system (2) has a hopper system (1) in the middle, and a floating corridor component (25) is provided between the top of the flexible cage system (2) and the top of the hopper system (1). An anchor cable system (3) is provided on the outer circumference of the flexible cage system (2). The silo system (1) includes several columns (11) and several transverse annular support pipes (12), and the columns (11) and the transverse annular support pipes (12) are fixedly connected. The columns (11) are distributed at equal angles with the transverse annular support pipes (12) as the center. The transverse annular support pipes (12) are inserted through the columns (11) and distributed at equal distances. The columns (11) and the transverse annular support pipes (12) form the frame of the silo system (1). The flexible cage system (2) includes several columns (21), several support pipes (22), several support components (23), several bottom annular thin support pipes (24) and bottom longitudinal support pipes (26). The upper and lower ends of the columns (21) are fixedly connected to the support pipes (22). Support components (23) are fixedly arranged between two adjacent columns (21). Several bottom annular thin support pipes (24) and several bottom longitudinal support pipes (26) are combined to form the bottom of the flexible cage system (2). Several support pipes (22) and several columns (21) are combined to form the frame of the flexible cage system (2). Several fixed connecting components (4) are fixedly arranged on the columns (21). The anchor cable system (3) includes several hemp ropes (31), several chains (32), several trapezoidal blocks (33) and several counterweights (34). One end of the hemp rope (31) is fixedly connected to the column (21), one end of the chain (32) is fixedly connected to the hemp rope (31), and the other end of the chain (32) is fixedly connected to the trapezoidal block (33). Several counterweights (34) are fixedly connected to the chain (32) and are distributed at equal distances along its length. The floating walkway assembly (25) includes a surrounding walkway (251) and multiple branch walkways (252). The surrounding walkway (251) is located at the top of the flexible cage system (2), and the bottom of the surrounding walkway (251) is fixedly connected to the top of several columns (21). The two ends of the branch walkways (252) are fixedly connected to the horizontal annular support pipes (12) at the top of the surrounding walkway (251) and the hopper system (1), respectively. The multiple branch walkways (252) are distributed at equal angles around the hopper system (1), and both the surrounding walkway (251) and the branch walkways (252) are fixedly connected by several main rods (253) and several cross rods (254). The several cross rods (254) are distributed at equal distances between the several main rods (253). The support member (23) includes an inclined support member (231), a horizontal support member (232) and a mesh support member (233). The horizontal support member (232) is fixedly connected to the column (21). The mesh support member (233) is located on both sides of the horizontal support member (232). A sleeve system (5) is provided between several of the inclined support members (231) and the horizontal support member (232). The sleeve system (5) includes several flexible sleeves (51), a transverse sleeve (52), several oblique sleeves (53), and sleeve connecting components (54). Several flexible sleeves (51) are located at the four corners of the transverse sleeves (52). The transverse sleeves (52) are fixedly sleeved with the transverse support (232). The oblique sleeves (53) are fixedly installed at the connection between the column (21) and the support pipe (22). The two ends of the oblique support (231) are sleeved with the flexible sleeves (51) and the oblique sleeves (53) respectively. Sleeve connecting components (54) are fixedly installed on the outside of several flexible sleeves (51) and transverse sleeves (52). The flexible sleeve (51) includes an inclined sleeve (511), a locking block (512), a spherical sleeve (513), a spherical locking block (514), and a flexible filling material (515). The spherical sleeve (513) is located at the four corners of the transverse sleeve (52) and is fixedly connected to the transverse sleeve (52). One end of the inclined sleeve (511) is fixedly connected to the spherical locking block (514). One end of the inclined support member (231) is located at... Inside the inclined sleeve (511), the locking block (512) is fixedly installed at one end of the inclined support (231). The locking block (512) is located inside the inclined sleeve (511). Flexible filling material (515) is filled inside the inclined sleeve (511), and the flexible filling material (515) is filled between the locking block (512) and the inclined sleeve (511) and between the spherical locking block (514) and the inclined sleeve (511).

2. The flexible deep-sea truss aquaculture cage according to claim 1, characterized in that, The support tube (22) includes a top annular thick support tube (221) and a bottom annular thick support tube (222). The bottom annular thick support tube (222) is located on the outer ring of the bottom annular thin support tube (24), and the top annular thick support tube (221) is located at the bottom of the surrounding corridor (251). The multiple branch corridors (252) are six branch corridors (252).

3. The flexible deep-sea truss aquaculture cage according to claim 2, characterized in that, Multiple bottom longitudinal support pipes (26) with equal angles are fixedly installed between the bottom annular coarse support pipe (222) and the transverse annular support pipe (12) located at the bottom of the silo system (1), and multiple bottom annular thin support pipes (24) are fixedly installed between the multiple bottom longitudinal support pipes (26).

4. The flexible deep-sea truss aquaculture cage according to claim 3, characterized in that, The mesh support (233) is fixedly connected to the fixed connection component (4) provided on the column (21). The inner layer of the mesh support (233) is laid between the inner side of the flexible cage system (2) and the inner side of the top of the bottom annular thin support tube (24) and the bottom annular thick support tube (222), and the outer side of the transverse annular support tube (12). The outer layer of the mesh support (233) is laid on the outer side and bottom end of the flexible cage system (2).

5. A flexible deep-sea truss aquaculture cage according to claim 4, characterized in that, The bottom annular thick support pipe (222) and the column (21) are filled with viscoplastic filler material, and the inclined support (231), the transverse support (232), the bottom annular thin support pipe (24), the bottom longitudinal support pipe (26), and the column (11) and transverse annular support pipe (12) of the silo system (1) are filled with seawater.

6. A flexible deep-sea truss aquaculture cage according to claim 4, characterized in that, The column (11), the transverse annular support pipe (12), the column (21), the support pipe (22), the floating corridor component (25), the fixed connection component (4), the inclined support component (231), the transverse support component (232), the bottom annular thin support pipe (24), the flexible sleeve (51), the transverse sleeve (52), the inclined sleeve (53), the sleeve connection component (54), and the bottom longitudinal support pipe (26) are all made of HDPE.

7. A flexible deep-sea truss aquaculture cage according to claim 4, characterized in that, The hemp rope (31) is made of high-strength polypropylene monofilament cable, and the net support (233) is made of special polyester monofilament and polyethylene twisted net.

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