Torsion-resistant and high-strength modular deep sea aquaculture net cage

Abstract

The utility model discloses an anti-torsion and high-strength modularized deep sea aquaculture net cage which comprises pile legs and a net cage body installed on the pile legs. The net cage body is of a modular spliced cage-shaped space truss structure and at least comprises side face modules. Each side module comprises an upper cross beam, a lower cross beam, an inclined strut assembly and an elastic buffer; the upper cross beam and the lower cross beam are arranged in parallel, and the inclined strut assembly is detachably connected between the upper cross beam and the lower cross beam; each upper cross beam and each lower cross beam are respectively composed of at least two sections of cross beam rods, and the elastic buffers are respectively arranged on the upper cross beams and the lower cross beams and are respectively positioned between the two sections of cross beam rods; the elastic buffers are additionally arranged on the cross beams, and when the net cage body is impacted by seawater, the elastic buffers have the telescopic springback function, so that the two cross beam rods can be mutually telescoped and finely adjusted in the axial direction of the rod bodies, the impact force of seawater on the net cage can be buffered, the tensile and compressive properties of the cross beams are enhanced, and the bending strength is improved.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering equipment technology, and in particular to a torsion-resistant, high-strength modular deep-sea aquaculture cage. Background Technology

[0002] Given the minimal change in global catches over the past 20 years, aquaculture will be the only way to increase total aquatic product output to meet the demand for high-quality aquatic animal protein. Land-based and near-shore aquaculture face constraints related to space, resources, and the environment, while deep-sea waters, with their vast expanse, excellent water quality, and rapid water exchange, offer a new space for developing modern aquaculture and the marine fisheries economy. Deep-sea cage aquaculture is an effective method of marine aquaculture.

[0003] Currently, most deep-sea aquaculture cages on the market are bottom-mounted or semi-submersible cages, with the cage frames mainly constructed from welded steel pipe frames. These structures suffer from drawbacks such as inconvenience in maintenance, net hauling, and cage relocation, and are generally installed in waters with calm waters, less susceptible to typhoons and other natural disasters. Self-elevating cages are an advanced type of aquaculture cage. They can freely rise and fall between the water surface and underwater according to aquaculture needs and environmental conditions. These cages include legs, a frame system, and a lifting transmission system. The frame system is movably mounted on the legs, and the lifting transmission system controls the frame system, allowing the cage to rise and fall freely along the legs between the water surface and underwater, enabling aquaculture at specific water layers and typhoon protection. The cage frame is a crucial component of the aquaculture cage, directly affecting its safety and stability. The design and construction methods for cage frames are continuously improving to adapt to different marine environments and enhance aquaculture efficiency.

[0004] However, regardless of whether it's the existing bottom-mounted gabion, semi-submersible gabion, or advanced self-elevating gabion, all have the following shortcomings: The frames of most of these gabions are connected by welding or bolting multiple truss sections together, inevitably generating weld stress. Over time, this makes them unable to withstand the impact of seawater, affecting the structural strength and reducing the safety of the gabion. Furthermore, repairing or replacing gabion frame components requires extensive welding and cutting work, which is not only time-consuming and labor-intensive but also increases maintenance costs. Simultaneously, due to the large size, weight, and length of the gabion frame, installation becomes a significant issue. Assembly is more costly due to the large size of the gabion frame and the demanding requirements for lifting equipment and the suitable lifting environment when using welding methods. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a torsion-resistant, high-strength modular deep-sea aquaculture cage.

[0006] The objective of this utility model is achieved through the following technical solution: a torsion-resistant, high-strength modular deep-sea aquaculture cage, comprising legs and a cage body mounted on the legs; the cage body is a modularly assembled cage-shaped space truss structure, including at least side modules; each side module includes an upper crossbeam, a lower crossbeam, diagonal bracing components, and elastic buffers for buffering the impact of seawater on the cage; the upper and lower crossbeams are arranged parallel to each other, and the diagonal bracing components are detachably connected between the upper and lower crossbeams; each upper and lower crossbeam consists of at least two crossbeam segments, and the elastic buffers are respectively mounted on the upper and lower crossbeams and located between the two crossbeam segments; under the impact of seawater, the crossbeam segments on the upper and lower crossbeams can be adjusted by mutual extension and retraction along the axial direction of the rod body.

[0007] Optionally, the elastic buffer includes a buffer housing, a sealing plate, and an elastic element arranged symmetrically. A hollow cavity is provided in the middle of the buffer housing, and the elastic element is installed in the hollow cavity. Two crossbeams on the upper and lower crossbeams are respectively inserted into the hollow cavity from both ends of the buffer housing and then abut against the elastic element. The sealing plate is sleeved on the crossbeam and fixedly installed at both ends of the buffer housing.

[0008] Optionally, the buffer housing includes a buffer housing 1 and a buffer housing 2 arranged symmetrically. The buffer housing 1 is provided with a first mounting hole, and the buffer housing 2 is provided with a second mounting hole corresponding to the position of the first mounting hole. The first mounting hole and the second mounting hole are fixedly connected by fasteners.

[0009] Optionally, the sealing plate is provided with a third mounting hole, and the first and second buffer housings are provided with a fourth mounting hole corresponding to the position of the third mounting hole. The third mounting hole and the fourth mounting hole are fixedly connected by fasteners.

[0010] Optionally, the elastic buffer further includes a movable mounting seat for mounting the connecting brace assembly, a guide rod, and an elastic spring. The elastic spring is sleeved on the guide rod, and the guide rod is fixedly installed on one side of the buffer housing one and the buffer housing two. The movable mounting seat is sleeved on the guide rod and reciprocates along the guide rod. The movable mounting seat is provided with a lug.

[0011] Optionally, a first guide structure is provided between the contact position of the movable mounting base and the contact positions of the first and second buffer housings.

[0012] Optionally, a second guide structure is provided between the two sections of the crossbeam and the buffer housing.

[0013] Optionally, the cage body further includes a top module, which includes a top crossbeam and a top diagonal brace; multiple top crossbeams are connected end to end to form the top outer frame of the aquaculture cage, and each of the top diagonal braces can be detachably connected to two adjacent top crossbeams; or the top crossbeam is replaced by the upper crossbeam in the side module.

[0014] Optionally, the cage surface module also includes a bottom module, which includes bottom crossbeams, bottom diagonal braces, and a central connecting rod; multiple bottom crossbeams are connected end to end to form the bottom outer frame of the aquaculture cage, and each bottom diagonal brace is detachably connected to two adjacent bottom crossbeams, or the bottom crossbeams are replaced by the lower crossbeams in the side module; the central connecting rod is radial, and its end is detachably connected to each of the bottom diagonal braces.

[0015] Optionally, the modular deep-sea aquaculture cage further includes a lifting and installation unit and a rack and pinion lifting unit. The lifting and installation unit includes an inner ring and an outer ring. The corner of the side module is installed on the outer ring. The inner ring is sleeved on the pile leg. The rack and pinion lifting unit is installed on the lifting and installation unit. The power output end of the rack and pinion lifting unit is provided with a climbing gear. The climbing gear meshes with the rack provided on the pile leg to drive the cage body to move freely up and down along the pile leg on and under the water surface.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This application adds multiple elastic buffers to the main load-bearing crossbeams of the gabion body. When the gabion body is impacted by seawater, the elastic buffers located on the upper and lower crossbeams have a telescopic rebound function, which allows the two crossbeams to be adjusted to each other along the axial direction of the rod, thus buffering the impact force of seawater on the gabion, strengthening the tensile and compressive strength of the crossbeams, and improving the bending strength of the entire gabion body.

[0018] 2. The overall structure of the elastic buffer in this application is roughly solid, which enhances the bending strength of its connecting structure. Furthermore, the elastic buffer is assembled in a detachable manner, improving assembly convenience, reducing welding points on the cage body, and lowering assembly and maintenance costs. In addition, the elastic buffer in this application installs the crossbeam in two sections, reducing the transport volume of the cage body. Both the crossbeam and the elastic buffer can be manufactured as standard, universal components, further reducing the manufacturing and transportation costs of the cage.

[0019] In addition, the upper / lower crossbeam is welded to the spring, and the end of the crossbeam is designed with a reinforced tube structure, such as thickened tube wall, or / and reinforced ribs are welded to strengthen the end. A limiting groove is opened on the surface of the tube wall at the end of the upper / lower crossbeam connected to the spring, and then its opening is sealed to reduce the corrosion of the inner wall of the pipe by seawater.

[0020] 3. This application will design a first assembly hole and a second assembly hole, which, in conjunction with fasteners, enable the rapid installation of the buffer housing 1 and the buffer housing 2. It will also design a third assembly hole and a fourth assembly hole, which, in conjunction with fasteners, enable the rapid installation of the buffer sealing plate and the buffer housing. The above structure can complete the installation and assembly of the elastic element and the two crossbeams, which can ensure the strength of the elastic buffer and meet the expansion and contraction requirements of the two crossbeams. Its structure is reasonable and the assembly is efficient.

[0021] 4. In this application, in order to improve the telescopic stability between the crossbeam and the elastic buffer, a guide structure is designed at the connection contact position between the buffer housing and the crossbeam and the movable mounting seat. The guide structure includes, but is not limited to, the preferred combination of the slide groove and the slider in this application, or it can be a commonly used combination structure with linear guiding function in the prior art, which will not be elaborated here. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention: a modular deep-sea aquaculture cage with torsion resistance and high strength.

[0023] Figure 2 This is a schematic diagram of the structure of the buffer housing and the upper / lower crossbeams in a preferred embodiment of the present invention;

[0024] Figure 3 This is a disassembly diagram of the buffer housing and upper / lower crossbeams according to a preferred embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the top surface module of a preferred embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the bottom module of a preferred embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the installation structure of the lifting mounting unit and the rack and pinion lifting unit according to a preferred embodiment of the present invention;

[0028] In the image: 100, Modular deep-sea aquaculture cage;

[0029] 1. Pile leg; 11. Gear rack;

[0030] 2. The cage body;

[0031] 21. Side module; 211. Upper crossbeam; 212. Lower crossbeam; 213. Diagonal brace assembly; 214. Elastic buffer; 2141. Buffer housing; 21411. First mounting hole; 21412. Second mounting hole; 21413. Fourth mounting hole; 2142. Sealing plate; 21421. Third mounting hole; 2143. Elastic element; 2144. Hollow cavity; 2145. Movable mounting base; 2146. Guide rod; 2147. Elastic spring; 2148. Hanging lug; 2149. First guide structure; 21410. Second guide structure;

[0032] 22. Top module; 221. Top beam; 222. Top brace;

[0033] 23. Bottom module; 231. Bottom crossbeam; 232. Bottom diagonal brace; 233. Middle connecting rod;

[0034] 3. Lifting and mounting unit; 31. Inner ring; 32. Outer ring; 33. Mounting part; 34. Mounting base;

[0035] 4. Rack and pinion lifting unit. Detailed Implementation

[0036] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0037] like Figure 1-6As shown, a torsion-resistant, high-strength modular deep-sea aquaculture cage 100 includes a leg 1, a cage body 2 mounted on the leg, a lifting and mounting unit 3, and a rack and pinion lifting unit 4. The cage body 2 is a modularly assembled cage-shaped space truss structure, constructed from side modules 21, top modules 22, and bottom modules 23. Each mesh module is detachably connected and mounted on the lifting and mounting unit 3 via pins or other means. The lifting and mounting unit 3 includes an inner ring 31 and an outer ring 32. The corners of each side module 21 are mounted on the outer ring 32. The inner ring 31 is fitted onto the leg 1. The outer ring 32 of the lifting and mounting unit 3 has a mounting part 33 for mounting two cage mesh modules. Each cage mesh module is detachably mounted on the mounting part 33 via pins or other connectors. Each lifting and mounting unit 3 mounts two side mesh modules, and multiple side mesh modules are connected end to end to form a polygonal frame structure. This example uses a pentagonal cage body 2 as an example to explain and illustrate each structure. The gear and rack lifting unit is mounted on the lifting installation unit 3 via the mounting base 34. The power output end of the gear and rack lifting unit is equipped with a climbing gear, which meshes with the rack 11 on the pile leg 1 to drive the net cage body 2 to move freely up and down along the pile leg 1 on the water surface and underwater. The rod components in each surface module are all hollow cylindrical steel materials.

[0038] The side module 21 of this application includes an upper crossbeam 211, a lower crossbeam 212, a diagonal brace assembly 213, and an elastic buffer 214 for buffering the impact of seawater on the cage. The upper crossbeam 211 and the lower crossbeam 212 are arranged parallel to each other. The diagonal brace assembly 213 is detachably connected between the upper crossbeam 211 and the lower crossbeam 212. Each of the upper crossbeam 211 and the lower crossbeam 212 consists of at least two crossbeam rods. The elastic buffer 214 is installed on the upper crossbeam 211 and the lower crossbeam 212, and is located between the two crossbeam rods. Specifically, in this preferred embodiment, the elastic buffer 214 located on the lower crossbeam 212 is designed to have two diagonal brace assembly installation positions. One diagonal brace assembly installation position is used for installation and connection with the diagonal brace assembly 213 on the side, and the other diagonal brace assembly installation position is used for installation and connection with the diagonal brace assembly 213 on the bottom surface. A diagonal brace assembly is designed on the elastic buffer 214 of the upper crossbeam 211 for connection with the diagonal brace assembly 213 on the top surface. This structure allows the crossbeams on the upper crossbeam 211 and lower crossbeam 212 to be slightly adjusted and extended along the axial direction of the rods when the cage body 2 is subjected to the impact of seawater.

[0039] This application adds multiple elastic buffers 214 to the main load-bearing crossbeams of the cage body 2. When the cage body 2 is subjected to the impact of seawater, the elastic buffers 214 located on the upper crossbeam 211 and the lower crossbeam 212 have a telescopic rebound function, which allows the two crossbeams to be telescopically adjusted along the axial direction of the rods. This can buffer the impact force of seawater on the cage, thereby strengthening the tensile and compressive strength of the crossbeams and improving the bending strength of the entire cage body 2.

[0040] As a further preferred embodiment, the elastic buffer 214 includes a buffer housing 2141, a sealing plate 2142, and an elastic element 2143 arranged symmetrically. A hollow cavity 2144 is provided in the middle of the buffer housing 2141. The elastic element 2143 is preferably a spring, rubber, or the like. The elastic element 2143 is installed in the hollow cavity 2144. Two sections of crossbeam rods on the upper crossbeam 211 and the lower crossbeam 212 are respectively inserted into the hollow cavity 2144 from both ends of the buffer housing 2141, and then abut against the elastic element 2143. The sealing plate 2142 is sleeved on the crossbeam rods and fixedly installed at both ends of the buffer housing 2141.

[0041] The elastic buffer 214 of this application has a generally solid overall structure, which can enhance the bending strength of its connecting structure. Furthermore, this application uses a detachable assembly method for the entire elastic buffer 214, improving assembly convenience, reducing the number of welding positions on the cage body 2, and lowering assembly and subsequent maintenance costs. In addition, the elastic buffer 214 of this application installs the crossbeam in two sections, which reduces the transportation volume of the cage body 2. Both the crossbeam and the elastic buffer 214 can be manufactured as standard, universal components, further reducing the manufacturing and transportation costs of the cage.

[0042] In addition, the upper crossbeam 211 / lower crossbeam 212 is welded to the spring, and the ends of the crossbeams are designed with a tube reinforcement structure, such as thickened tube walls, or / and reinforced ribs are welded on to strengthen the ends. Limit grooves are formed on the surface of the tube wall portion of the upper crossbeam 211 / lower crossbeam 212 at the end connected to the spring, and then the tube opening is sealed to reduce seawater corrosion of the inner wall of the pipe.

[0043] As a further preferred embodiment, the buffer housing 2141 includes a buffer housing 1 and a buffer housing 2 arranged symmetrically. The buffer housing 1 is provided with a first mounting hole 21411, and the buffer housing 2 is provided with a second mounting hole 21412 corresponding to the position of the first mounting hole 21411. The first mounting hole 21411 and the second mounting hole 21412 are fixedly connected by fasteners (not shown in the figure).

[0044] As a further preferred embodiment, the sealing plate 2142 is provided with a third mounting hole 21421, and the first buffer housing and the second buffer housing are provided with a fourth mounting hole 21413 corresponding to the position of the third mounting hole 21421. The third mounting hole 21421 and the fourth mounting hole 21413 are fixedly connected by fasteners.

[0045] This application designs a first mounting hole 21411 and a second mounting hole 21412, which, in conjunction with fasteners, enable the rapid installation of the first and second buffer housings. It also designs a third mounting hole 21421 and a fourth mounting hole 21413, which, in conjunction with fasteners, enable the rapid installation of the sealing plate 2142 and the buffer housing 2141. The above structure can complete the installation and assembly of the elastic element 2143 and the two crossbeams, ensuring the strength of the elastic buffer 214 and meeting the expansion and contraction requirements of the two crossbeams. Its structure is reasonable and the assembly is efficient.

[0046] As a further preferred embodiment, the elastic buffer 214 further includes a movable mounting base 2145, a guide rod 2146, and an elastic spring 2147 for mounting and connecting the diagonal brace assembly 213. The elastic spring 2147 is sleeved on the guide rod 2146, and the guide rod 2146 is fixedly installed on one side of the buffer housing 1 and the buffer housing 2. The movable mounting base 2145 is sleeved on the guide rod 2146 and reciprocates along the guide rod 2146. The movable mounting base 2145 is provided with a lug 2148.

[0047] In addition to the upper crossbeam 211 and the lower crossbeam 212, the installation structure of the diagonal bracing assembly 213 also needs further optimization to accommodate the expansion and contraction needs between the crossbeams. This allows the entire cage to achieve adaptive expansion and contraction buffering. Specifically, at least one movable mounting seat 2145 is designed in the elastic buffer 214. This movable mounting seat 2145 can be installed at the bottom and / or side of the elastic buffer 214. In this preferred embodiment, the elastic buffer 214 on the lower crossbeam 212 is preferably designed with two movable mounting seat installation positions. One movable mounting seat is used for installation and connection with the diagonal bracing assembly 213 on the side, and the other movable mounting seat is used for installation and connection with the diagonal bracing assembly 213 on the bottom surface. The elastic buffer 214 on the upper crossbeam 211 is designed with one movable mounting seat installation position for installation and connection with the diagonal bracing assembly 213 on the top surface. This structural design is reasonable and can fully utilize the installation relationship between the diagonal bracing assembly 213 and the elastic buffer 214, meeting the installation needs of the aquaculture cage and reducing the waste of various assembly components.

[0048] As a further preferred embodiment, a first guide structure 2149 is provided between the contact position of the movable mounting base 2145 and the contact positions of the first and second buffer housings.

[0049] As a further preferred embodiment, a second guide structure 21410 is provided between the two sections of the crossbeam and the buffer housing 2141.

[0050] In this application, in order to improve the telescopic stability between the crossbeam and the elastic buffer 214, a guide structure is designed at the connection and contact position between the buffer housing 2141 and the crossbeam and the movable mounting base 2145. The guide structure includes, but is not limited to, the preferred combination of the slide groove and the slider in this application, or it can be a commonly used combination structure with linear guiding function in the prior art, which will not be elaborated here.

[0051] As a further preferred embodiment, the top module 22 of this application includes a top crossbeam 221 and top diagonal braces 222; multiple top crossbeams 221 are connected end to end to form the top outer frame of the aquaculture net cage, and each of the top diagonal braces 222 is detachably connected to two adjacent top crossbeams 221; or the top crossbeams 221 can be replaced by the upper crossbeams 211 in the side module 21. Reinforcing ribs are welded to the inside of the left and right ends of the top crossbeams 221 to improve their strength.

[0052] As a further preferred embodiment, the bottom module 23 of this application includes a bottom crossbeam 231, bottom diagonal braces 232, and a central connecting rod 233. Multiple bottom crossbeams 231 are connected end-to-end to form the bottom outer frame of the aquaculture net cage. Each bottom diagonal brace 232 is detachably connected to two adjacent bottom crossbeams 231. The central connecting rod 233 is radially arranged, and its ends are detachably connected to each of the bottom diagonal braces 232. In this preferred embodiment, the bottom crossbeam 231 is replaced by the lower crossbeam 212 in the side module 21. Reinforcing ribs are welded to the interior of both ends of the bottom crossbeam 231 to improve its strength.

[0053] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A torsionally stiff, high-strength modular deep-sea cage, characterised in that, The net cage includes a pile leg, a net cage body installed on the pile leg; the net cage body is a cage-shaped space truss structure assembled in modules, and at least includes a side module; the side module includes an upper cross beam, a lower cross beam, a diagonal brace assembly, and an elastic buffer for buffering the impact force of seawater on the net cage; the upper cross beam and the lower cross beam are arranged in parallel with each other, and the diagonal brace assembly is connected between the upper cross beam and the lower cross beam in a detachable manner; each of the upper cross beam and the lower cross beam is composed of at least two cross beam rods, and the elastic buffer is installed on the upper cross beam and the lower cross beam respectively and located between the two cross beam rods; under the impact of seawater, the cross beam rods on the upper cross beam and the lower cross beam can be adjusted in the axial direction of the rod body.

2. The torsionally stiff, high-strength modular deep sea net pen of claim 1, wherein, The elastic buffer includes a buffer housing, a sealing plate and an elastic element arranged symmetrically; a hollow cavity is formed in the middle of the buffer housing, the elastic element is installed in the hollow cavity, and the two cross beam rods on the upper cross beam and the lower cross beam are inserted into the hollow cavity from both ends of the buffer housing and then abut on the elastic element respectively; the sealing plate is sleeved on the cross beam rod and fixedly installed at both ends of the buffer housing.

3. The torsionally stiff, high-strength modular deep sea net pen of claim 2, wherein, The buffer housing includes a buffer housing one and a buffer housing two arranged symmetrically; the buffer housing one is provided with a first assembly hole, the buffer housing two is provided with a second assembly hole corresponding to the position of the first assembly hole, and the first assembly hole and the second assembly hole are fixedly connected through fasteners.

4. The torsionally stiff, high-strength modular deep sea net pen of claim 2, wherein, The sealing plate is provided with a third assembly hole, the buffer housing one and the buffer housing two are provided with a fourth assembly hole corresponding to the position of the third assembly hole, and the third assembly hole and the fourth assembly hole are fixedly connected through fasteners.

5. The torsionally stiff, high-strength modular deep sea net pen of claim 2, wherein, The elastic buffer further includes a movable mounting seat for mounting and connecting the diagonal brace assembly, a guide rod and an elastic spring; the elastic spring is sleeved on the guide rod, the guide rod is fixedly installed on one side of the buffer housing one and the buffer housing two, and the movable mounting seat is sleeved on the guide rod and moves reciprocally along the guide rod; the movable mounting seat is provided with a lug portion.

6. The torsionally stiff, high-strength modular deep sea net pen of claim 5, wherein, A first guide structure is arranged between the contact positions of the movable mounting seat and the buffer housing one and the buffer housing two.

7. The torsionally stiff, high-strength modular deep sea farming net cage according to any of claims 2-6, characterized in that, A second guide structure is arranged between the two cross beam rods and the buffer housing.

8. The torsionally stiff, high-strength modular deep sea net pen of any one of claims 1-6, wherein, The net cage body further includes a top module, the top module includes a top cross beam and a top diagonal brace; a plurality of top cross beams are connected end to end to form a top outer frame of the net cage, and each top diagonal brace is detachably connected to two adjacent top cross beams; or the top cross beam is replaced by the upper cross beam in the side module.

9. The torsionally stiff, high-strength modular deep sea net pen of any one of claims 1-6, wherein, The net cage body further includes a bottom module, the bottom module includes a bottom cross beam, a bottom diagonal brace and a middle connecting rod; a plurality of bottom cross beams are connected end to end to form a bottom outer frame of the net cage, each bottom diagonal brace is detachably connected to two adjacent bottom cross beams, or the bottom cross beam is replaced by the lower cross beam in the side module, and the middle connecting rod is radially arranged and detachably connected to each bottom diagonal brace.

10. The torsionally stiff, high-strength modular deep sea net pen of any one of claims 1-6, wherein, The modular deep-sea culture net cage further comprises a lifting installation unit and a rack and pinion lifting unit, the lifting installation unit comprises an inner ring part and an outer ring part, the corner position of the side module is installed on the outer ring part, the inner ring part is sleeved on the pile leg, the rack and pinion lifting unit is installed on the lifting installation unit, a climbing gear is arranged at the power output end of the rack and pinion lifting unit, and the climbing gear is in meshing transmission with the rack arranged on the pile leg, so as to drive the net cage body to freely lift along the pile leg on the water surface and underwater.

Images