A netting installation system and method for offshore farming net pens

Abstract

The application discloses a netting installation system and method for offshore aquaculture net cages, and belongs to the technical field of marine aquaculture. The system comprises a net cage main body formed by splicing net cage units, wherein the net cage units comprise a net cage frame and netting. By arranging a fixed hook and an auxiliary binding unit on opposite sides of the net cage frame, the netting can be quickly mounted and synchronously tensioned in a concentrated manner. A detachable structure composed of sectional upper and lower clamping pieces is arranged on the inner side of the net cage frame to quickly lock the netting after tensioning. The auxiliary binding unit adopts a gear and rack transmission and integrates manual and automatic dual-mode driving and a worm gear self-locking mechanism, thereby realizing quantitative adjustment and stable maintenance of the tensioning force. The application realizes modular and rapid installation and maintenance of the netting, and significantly improves the installation efficiency, tensioning uniformity and system reliability.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, and in particular to a marine aquaculture cage netting installation system and installation method. Background Technology

[0002] Marine aquaculture cages are important facilities in the marine aquaculture industry. Their main structure consists of a frame system formed by trusses, and then netting is installed on the frame system to form the aquaculture cage. The netting is a key component that prevents fish from escaping and maintains the aquaculture environment. The installation, fixing and maintenance of the netting directly affect the efficiency and economic benefits of aquaculture operations.

[0003] In existing technologies, the traditional method of installing netting generally uses manual tying, that is, directly tying the netting to the uprights (mainly the sides) of the cage frame with ropes. This method has revealed the following obvious drawbacks in long-term practice: (1) The installation and dismantling process relies on a lot of manual operation, which is labor-intensive and labor-intensive. Operators need to manually tighten, tie and untie at each node. There are many nodes (discrete tying), which not only takes a long time, but also has low safety when the sea conditions are complicated. The operation is cumbersome and the experience of the personnel is obviously limited. (2) The tension of the net is difficult to adjust. It is difficult to achieve uniform tension of the net by manual binding. It is easy to have local looseness or excessive tightness, which affects the exchange of water inside and outside the net cage. In the long term, it may cause the net to deform or be damaged, which is not conducive to the healthy growth of the cultured organisms. (3) Cleaning and maintaining netting is extremely inconvenient. Traditional methods of cleaning netting require completely untying it and bringing it back to shore before removing fouling organisms. This process is not only cumbersome and time-consuming, but also causes the net cages to be unusable during this period, affecting the continuity of aquaculture and increasing operating costs. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, the technical problem to be solved by this invention is to propose a marine aquaculture cage netting installation system and method, which integrates the direct, rapid, mechanized installation, disassembly, tensioning, and in-situ cleaning of the netting on the cage frame, thereby significantly reducing labor costs, improving operational efficiency and netting maintenance convenience, and promoting the transformation and upgrading of marine aquaculture facilities towards mechanization and automation, thus promoting the sustainable development of the marine aquaculture industry.

[0005] To achieve this objective, the present invention adopts the following technical solution: This invention provides a marine aquaculture cage netting installation system, comprising a cage body formed by splicing several cage units. Each cage unit includes a cage frame and a netting set on the cage frame. Two opposing trusses in the cage frame cooperate with each other. One truss is fixed with a base plate along the length of its outer edge. The base plate is evenly distributed with several fixed hooks that cooperate with the netting along its length. The other truss is provided with several auxiliary binding units along its length. After the netting is hung on the fixed hooks, the auxiliary binding units on the opposing truss hook the netting to adjust the tightness. The inner edge of the cage frame is also provided with a mounting and disassembly structure that works with the netting, so that after the netting is tightened, the netting is fixed to the cage frame by the mounting and disassembly structure.

[0006] It also includes a method for installing netting on marine aquaculture cages, utilizing a marine aquaculture cage netting installation system as described above, comprising the following steps: S00: Preparation of the main body of the cage. Splice multiple cage units together to form the main body of the cage. Confirm that the base plate, hooks, auxiliary binding units, and loading and unloading structures are complete and intact. Select the appropriate specifications of netting according to the size of the cage unit. S10: Initial hanging of the mesh, confirm the front and back and top and bottom directions of the mesh, and then hang one edge of the mesh on the fixed hook on the fixed base plate in sequence. S20: Netting tension adjustment. First, multiple auxiliary binding units are installed to the corresponding positions on the netting frame through the assembly structure. Then, the moving hooks on the auxiliary binding units are hooked to the netting. Multiple auxiliary binding units are adjusted synchronously or sequentially to adjust the tension of the netting, ensuring that the overall tension of the netting is uniform. S30: Netting Fixing. After the netting is tensioned to the correct position, place the edge of the netting on the lower clamping plate. Cover the edge of the netting section by section with the upper clamping plate and align it with the lower clamping plate. Use the locking nut to fix the upper clamping plate, lower clamping plate and netting. Add a washer to protect the netting. After fixing, loosen the netting with the moving hook on the auxiliary binding unit. S40: Install the cleaning structure, install rolling rollers and winch rollers corresponding to the position of the netting on the top of the main body of the cage, and set a high-pressure water gun between the two rollers that matches the direction of netting movement; S50: Check the tension of the mesh and whether the connections are secure.

[0007] The beneficial effects of this invention are as follows: (1) This invention transforms the complex operation of "multi-point manual discrete binding" in the traditional netting installation into a three-step standardized process of "fixed hook mounting - dynamic adjustment of auxiliary binding unit - loading and unloading structure locking". Through structural decoupling, the three functions of mounting, tensioning and fixing are independently undertaken by specialized components. Operators do not need to perform complex rope knotting and strength judgment, which significantly reduces the dependence on highly skilled manpower in offshore operations. The operation process is simplified, the difficulty of offshore operations and labor costs are greatly reduced, and the installation efficiency is greatly improved. (2) When installing the netting, a fixed hook is set on one side to achieve quick positioning, and an auxiliary binding unit based on gear and rack transmission is set on the opposite side to achieve a mechanical structure for tensioning the opposite side. The rotation angle of the drive gear and the displacement of the tension rack are precisely linearly related, which makes the tension adjustable quantitatively and avoids the problem of "multi-point independent binding" in traditional methods that makes it difficult to ensure overall uniformity. Multiple auxiliary binding units can be adjusted synchronously or step by step to ensure that the overall tension of the netting is evenly distributed, effectively eliminating local over-tightness or over-looseness, that is, the tension is quantitatively adjusted and evenly controlled, improving the stress performance of the netting; (3) The auxiliary binding unit adopts a worm gear as an automatic drive mechanism. Utilizing the reverse self-locking characteristic of the worm gear transmission, it can completely resist the reverse driving tendency of the net under dynamic loads such as water flow and waves. At the same time, the drive gear and tension rack also have a certain self-locking retention capability when there is no drive. The superposition of the double self-locking mechanism ensures the long-term stable maintenance of the net tension under harsh sea conditions, solving the problem of slack caused by vibration or creep in traditional rope binding. (4) The auxiliary binding unit integrates manual and automatic dual-mode drive, and achieves physical switching through a connecting mechanism (connecting wheel). The automatic mode (external power unit combined with worm gear structure) is suitable for large cages or batch operations, achieving fast and labor-saving tensioning; the manual mode (crank handle) serves as a redundant backup and can be operated independently when there is no power or equipment failure. The two modes share the same output shaft and do not interfere with each other, which not only meets the requirements of efficient operation, but also greatly improves the emergency response capability and reliability of the system in complex marine environments; (5) The auxiliary binding unit is connected to the cage frame through an assembly structure (such as fan-shaped mounting holes), which can achieve fine angle adjustment to adapt to different tensioning direction requirements. As an independent functional module, it can be universally installed on cages of different specifications. The loading and unloading structure adopts a segmented upper clamping plate and a welded lower clamping plate to transform the traditional "point fixing" into "continuous surface contact clamping". The force is uniform, and when a part is damaged, a certain section of the upper clamping plate can be replaced separately without overall disassembly. Through modular design, the installation is flexible and easy to maintain. (6) By setting a cleaning structure consisting of rolling rollers, winch rollers and high-pressure water guns on the top of the net cage, the integrated operation of "rolling up - continuous cleaning - resetting" can be completed in place without disassembling the net as a whole and bringing it ashore. During the cleaning process, the main body of the net cage remains relatively intact, and the fish can continue to be temporarily held, avoiding the production interruption and high cost of round-trip transportation caused by traditional cleaning methods. It is particularly suitable for the operation and maintenance needs of large net cages in deep sea. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of a marine aquaculture cage netting installation system (without cleaning structure) provided in a specific embodiment of the present invention; Figure 2 yes Figure 1 Enlarged diagram of A in the middle; Figure 3 This is a schematic diagram from another perspective of a marine aquaculture cage netting installation system (without cleaning structure) provided in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the auxiliary binding unit provided in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the auxiliary binding unit (in manual drive mode) provided in a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the auxiliary binding unit (in manual drive mode) provided in a specific embodiment of the present invention from another perspective. Figure 7 This is a schematic diagram of the auxiliary binding unit (in automatic driving mode) provided in a specific embodiment of the present invention; Figure 8 This is a schematic diagram of the auxiliary binding unit (without connecting wheels in automatic drive mode) provided in a specific embodiment of the present invention from another perspective. Figure 9 This is a schematic diagram of the cleaning structure provided in a specific embodiment of the present invention; Figure 10 This is a structural schematic diagram of the auxiliary binding unit (in automatic drive mode) connected to the wheel from the perspective of a specific embodiment of the present invention.

[0009] In the picture: 1. Cage unit; 10. Cage body; 11. Cage frame; 12. Netting; 111. Truss; 112. Fixed base plate; 121. Fixed hook; 2. Auxiliary binding unit; 21. Auxiliary plate; 2101. Adjustment area; 2102. Fixing area; 22. Tensioning rack; 221. Moving hook; 211. Guide rail; 23. Manual drive mechanism; 24. Automatic drive mechanism; 25. Connecting mechanism; 26. Drive gear; 261. Drive shaft; 231. Handle; 232. Mounting slot; 233. Auxiliary drive gear; 241. Worm gear; 242. Worm; 2411. Secondary rotating shaft; 2412. Secondary power wheel; 251. Connecting wheel; 2511. Snap-fit ​​groove; 252. Release groove; 2521. Snap-fit ​​block; 253. Locking cylinder; 254. Locking key; 2531. Locking groove; 255. Fixing hole; 3. Assembly structure; 31. Mounting holes; 4. Loading and unloading structure; 41. Lower clamping plate; 42. Upper clamping plate; 43. Gasket; 5. Cleaning structure; 51. Rolling roller; 52. Winch roller; 53. High-pressure water gun. Detailed Implementation

[0010] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0011] To address the problems of reliance on extensive manual labor during the installation and dismantling of marine aquaculture cages, difficulties in adjusting the tension of the netting, and inconvenience in cleaning and maintenance, the main concept of this invention is to construct a dynamically adjustable, conveniently load and unloaded, and modularly adjustable netting installation system. Firstly, the netting is pre-positioned and dynamically tensioned using a pre-set structure. Secondly, the netting is secured using a segmented loading and unloading structure for the netting and cage frame. Therefore, this invention provides a marine aquaculture cage netting installation system and method.

[0012] Example 1: A marine aquaculture cage netting installation system includes a cage body 10 formed by splicing several cage units 1. Each cage unit 1 includes a cage frame 11 and a netting 12 mounted on the cage frame 11. In this invention, when binding the netting 12 to the cage frame 11, it is first pre-tightened. Specifically, two opposing trusses 111 in the cage frame 11 cooperate. One truss 111 has a fixed base plate 112 fixed along its outer edge. The fixed base plate 112 has several fixed hooks 121 evenly distributed along its length to cooperate with the netting 12. The other truss 111 has several auxiliary binding units 2 along its length. After the netting 12 is hung on the fixed hooks 121, the auxiliary binding units 2 on the opposing truss 111 are... The netting 12 is hooked to adjust its tightness. In this way, the fixed hook 121 and the auxiliary binding unit 2 work together to tighten and adjust the netting 12. Then, the inner edge of the net cage frame 11 is also provided with a loading and unloading structure 4 that works with the netting 12. After the netting 12 is tightened, the loading and unloading structure 4 fixes the netting 12 to the net cage frame 11. In general, the fixed hook 121 enables the rapid mounting of the netting 12, the auxiliary binding unit 2 enables centralized and synchronous tightening and adjustment, and the loading and unloading structure 4 changes the traditional discrete fixing method of multiple manual bindings to segmented rapid fixing. The whole process changes from multi-point manual discrete binding to a three-step operation of fixed hook 121 mounting ~ auxiliary binding unit 2 dynamic adjustment ~ loading and unloading structure 4 locking, which greatly reduces the difficulty of manual binding at sea.

[0013] Furthermore, this case decouples the "connection" and "tensioning" functions that are simultaneously performed in the traditional "binding" action. In the traditional binding method, "hanging the net" and "tensioning" are completed by the same set of rope binding actions, which has a high degree of operational coupling and is difficult to adjust. In this case, the three functions of hanging (fixed hook 121), tensioning (auxiliary binding unit 2), and fixing (loading and unloading structure 4) are structurally decoupled, and each function is undertaken by a dedicated component.

[0014] The following details the division of labor between the fixed hook 121 and the auxiliary binding unit 2, and the use of the loading and unloading structure 4 to fix the netting 12: (1) Division of labor and cooperation between fixed hook 121 and auxiliary binding unit 2: Its main structure is to pre-set base plate 112 and fixed hook 121 on one side truss 111 to realize the quick hanging and initial positioning of net 12, and set auxiliary binding unit 2 on the opposite side truss 111, which is specifically used for tension adjustment. In this way, by setting auxiliary binding unit 2 on the opposite side, the tensioning operation can be independently controlled, and it can cooperate with the evenly distributed fixed hook 121 to form a mechanical structure of tension on opposite sides, which is easier to achieve overall uniformity than the "multi-point independent binding" in the traditional method. The division of labor and cooperation between the fixed hook 121 and the auxiliary binding unit 2 needs to solve two problems: first, how the auxiliary binding unit 2 tightens the netting 12; and second, how the auxiliary binding unit 2 is installed on the net cage frame 11. To address these two problems, this paper describes the structure of the auxiliary binding unit 2: 1.1) In this case, the auxiliary binding unit 2, in order to tighten the netting 12, adopts the meshing transmission of the drive gear 26 and the tension rack 22. The tension rack 22 moves linearly under the constraint of the guide rail 211, driving the moving hook 221 to pull the netting 12. Specifically, the auxiliary binding unit 2 includes an auxiliary plate 21, which includes an adjustment area 2101 and a fixing area 2102 for installing the auxiliary plate 21 onto the netting frame 11. The auxiliary plate 21 has a matching part on the side away from the netting frame 11. A tension rack 22 and a drive gear 26 are provided. The tension rack 22 is provided with a matching movable hook 221 at one end near the mesh 12. The bottom of the auxiliary plate 21 is provided with a guide rail 211 that matches the tension rack 22. The drive gear 26 is rotatably connected to the auxiliary plate 21 through a drive shaft 261. The axial direction of the drive shaft 261 is perpendicular to the plane direction of the auxiliary plate 21. The drive gear 26 meshes with the tension rack 22. The drive gear 26 drives the tension rack 22 to move along the guide rail 211. The auxiliary plate 21 is integrated with the adjustment area 2101 and the fixed area 2102. The drive shaft axis of the drive gear 26 is perpendicular to the plane of the auxiliary plate 21. This makes the operating surface (end of the drive gear 26) and the tensioning surface of the mesh 12 (movement direction of the tension rack 22) form a reasonable spatial relationship, which facilitates the safe operation of the operator at the edge of the mesh frame 11, while avoiding excessive protrusion of the mechanism that may cause interference with the mesh or other structures. At the same time, the guide rail 211 is set at the bottom of the auxiliary plate 21, forming a stable sliding structure with the tension rack 22, which ensures the smoothness of the linear movement of the tension rack 22 and its resistance to eccentric load.

[0015] During the process of the drive gear 26 driving the tension rack 22 to move along the guide rail 211, the rotation angle of the drive gear 26 and the linear displacement of the tension rack 22 have a precise linear relationship. The operator can control the displacement of the moving hook 221 by controlling the number of teeth or turns of the drive gear 26 as needed, thereby realizing the quantitative adjustment of the tension of the net 12. When no driving force is applied, this gear and rack transmission mechanism, when combined with a self-locking mechanism (such as the worm gear or brake device used below), can stably maintain the tension state, avoiding the loosening problem caused by vibration or creep in traditional rope binding. When multiple auxiliary binding units 2 are arranged, they can be adjusted synchronously or stepwise to make the overall tension of the net 12 evenly distributed and avoid local over-tightness or over-looseness.

[0016] The above process illustrates that the drive gear 26 in the auxiliary binding unit 2 can drive the tension rack 22 to tighten the net 12. However, it should be noted that the drive gear 26 itself cannot rotate on its own. Therefore, to adapt to different operating scenarios, the adjustment area 2101 is equipped with a manual drive mechanism 23 and an automatic drive mechanism 24 that drive the drive gear 26 to rotate. The manual drive mechanism 23 and the automatic drive mechanism 24 are switched through the connecting mechanism 25. In this way, the automatic drive mode can achieve fast and labor-saving tensioning operation through power sources such as motors and hydraulic motors, which is especially suitable for large net cages or batch operation scenarios, greatly reducing the labor intensity of personnel. The manual drive mode serves as a redundancy backup and can be used when there is no power supply at sea, power equipment failure, or only fine adjustment is required, ensuring that the system can complete the tensioning operation under any circumstances, improving the reliability and emergency response capability of the system. Small-scale aquaculture farmers or scenarios with inconvenient electricity can mainly rely on the manual mode. Large deep-sea aquaculture platforms can give full play to the advantages of the automatic mode and integrate it with the electrical control system to achieve one-button tensioning control, which will not be elaborated here.

[0017] The following describes the manual drive mode and the automatic drive mode, as well as the switching between the two: 1.1.1) The manual drive mechanism 23 includes a detachable crank 231 that mates with the drive gear 26. The crank 231 drives the drive gear 26 to rotate, as shown in the figure. The detachable design means that the crank 231 can be inserted into the end face of the drive gear 26 during use and can be pulled out and stored separately after use to avoid long-term exposure to the high humidity and salt spray environment of the ocean, which may lead to corrosion or damage. Specifically, the crank 231 is provided with a spline for locking (or other structures such as square tenons, hexagonal heads, or quick-release structures), and the end face of the drive gear 26 is provided with a socket that mates with the spline on the crank 231. When the crank 231 is inserted into the end face of the drive gear 26, the spline on the crank 231 engages with the socket on the end face of the drive gear 26. Thus, when the operator turns the crank 231, the drive gear 26 can be rotated, which in turn drives the tension rack 22 to move along the guide rail 211 to tighten the netting.

[0018] 1.1.2) In the specific application scenario of marine aquaculture cages, due to the high humidity and high corrosiveness of the environment, the automatic drive mechanism 24 includes an active drive structure located on the side of the auxiliary plate 21 near the cage frame 11. The active drive structure is a worm gear structure composed of a worm wheel 241 and a worm 242. The worm wheel 241 is rotatably connected to the auxiliary plate 21 through a secondary rotating shaft 2411. The axial direction of the secondary rotating shaft 2411 is perpendicular to the plane of the auxiliary plate 21, and the axial direction of the worm 242 is parallel to the length direction of the auxiliary plate 21. Both ends of the worm 242 are rotatably connected to the auxiliary plate 21, and a power unit for driving the worm 242 to rotate is provided at one end of the worm 242. A secondary power wheel 2412 is also provided on the secondary rotating shaft 2411, and the worm 242 is connected to the auxiliary plate 21 through a secondary rotating shaft 2411. The worm gear 241 is driven to rotate, which in turn drives the auxiliary power wheel 2412 to rotate. The auxiliary power wheel 2412 drives the drive shaft 261 to rotate through the connecting mechanism 25. Thus, the automatic drive mechanism 24 uses a worm gear structure as the active drive, and transmits power to the drive gear 26 through the auxiliary power wheel 2412 and the connecting mechanism 25. First, this case uses a worm gear structure as the active drive. The worm gear transmission has a reverse self-locking characteristic - when the helix angle of the worm 242 is less than the friction angle, the mechanism can only be driven by the worm gear and cannot be driven by the worm gear 241 in the reverse direction. The net 12 will generate dynamic tension fluctuations under the action of water flow, waves and wind loads. These tensions have a tendency to drive the transmission mechanism in the reverse direction and cause the net 12 to loosen. The self-locking characteristic of the worm gear can completely resist this reverse drive, ensuring that the tensioned state remains stable when the net 12 is tightened by the tension rack 22. At the same time, the worm gear structure can achieve a large reduction ratio, outputting a large tension force with a small power unit. That is, the high-speed, low-torque input of the power unit is converted into a low-speed, high-torque output, so that a small-power motor can drive the tensioning of a large net. This characteristic is particularly important for large deep-sea cages (large net area and high water resistance), which can significantly reduce the specifications and cost of the power unit. Meanwhile, the drive gear 26 and the tension rack 22 also have a certain self-locking retention capability (tooth surface friction and system resistance) when there is no drive. The superposition of the dual self-locking mechanism ensures that the tensioned state of the net 12 can be reliably maintained even under harsh sea conditions and severe vibration.

[0019] Preferably, the power unit can be a waterproof and salt spray resistant model of a motor, hydraulic motor, etc., and can be integrated into the auxiliary plate 21 of the auxiliary binding unit 2. For the sake of the overall weight reduction of the auxiliary binding unit 2, the mounting part for cooperating with the power unit can be reserved only at one end of the worm gear 242. In this way, the power unit that drives the worm gear 242 to rotate can be temporarily installed on the auxiliary plate 21 during use. Even when making local adjustments to the netting 12, the operator can hold the small power unit to drive the worm gear 242 to rotate in order to adjust the netting 12.

[0020] In terms of space utilization, the auxiliary power wheel 2412 is connected to the drive shaft 261 through the connecting mechanism 25, and can be flexibly arranged on the back (or side) of the auxiliary plate 21, avoiding spatial interference with components such as the tension rack 22 and the guide rail 211. The worm gear 241, worm 242, and auxiliary power wheel 2412 can be integrated into a closed gearbox (not shown in the figure for clarity of the internal structure), which can isolate the transmission components from the external seawater and salt spray, improving corrosion resistance. The whole unit is installed on the back of the auxiliary plate 21 to form an independent drive module. Thus, the auxiliary binding unit 2 can be prefabricated as a standard module. On-site installation only requires fixing the auxiliary plate 21 to the cage frame 11 and connecting the connecting mechanism 25 to the drive shaft 261 to complete the installation, which is suitable for mass production and application.

[0021] 1.1.3) The function of the connecting mechanism 25 is to realize the switching or coupling of the manual drive mechanism 23 and the automatic drive mechanism 24. The core structure is: by changing the axial position of the connecting wheel 251 along the drive shaft 261, the engagement or disengagement of the connecting wheel 251 with the auxiliary power wheel 2412 (automatic drive end) is controlled, thereby determining the power source. First, the manual drive mode is switched. The connecting mechanism 25 includes a connecting wheel 251 (or it can be a chain drive, synchronous belt, etc.) sleeved on the drive shaft 261. The connecting wheel 251 is provided with a snap-fit ​​groove 2511 on the side near the auxiliary plate 21. The auxiliary plate 21 is provided with a disengagement groove 252 that cooperates with the connecting wheel 251. The bottom of the disengagement groove 252 is provided with a snap-fit ​​block 2521 that cooperates with the snap-fit ​​groove 2511. The depth of the disengagement groove 252 is greater than the tooth width of the connecting wheel 251. After the connecting wheel 251 is pushed into the disengagement groove 252, the connecting wheel 251 is disengaged from the auxiliary power wheel 2412, thereby switching to the manual drive mechanism 23. In this way, the connecting wheel 251 slides into the disengagement groove 252 along the drive shaft 261 and completely disengages from the auxiliary power wheel 2412. At this time, the drive gear 26 is only connected to the crank handle 231 (manual drive mechanism 23), the automatic drive path is cut off, and they do not interfere with each other. After the connecting wheel 251 is pushed into the disengagement groove 252, the locking groove 2511 and the locking block 2521 cooperate to fix the connecting wheel 251 in the disengagement position, preventing it from automatically sliding back and interfering with the auxiliary power wheel 2412. The operation is quick and the switching can be completed and maintained without tools.

[0022] A locking cylinder 253 is fixedly provided on the side of the connecting wheel 251 away from the auxiliary plate 21. A locking key 254 that cooperates with the locking cylinder 253 is fixedly provided on the end of the drive shaft 261 away from the drive gear 26. A locking groove 2531 that cooperates with the locking key 254 is provided on the locking cylinder 253. A fixing hole 255 that cooperates with the end of the drive shaft 261 away from the drive gear 26 and the end of the locking cylinder 253 near the locking key 254 are provided. After the locking key 254 on the drive shaft 261 is inserted into the locking groove 2531 of the locking cylinder 253, the end of the drive shaft 261 and the end of the locking cylinder 253 abut against each other. A bolt is inserted into the fixing hole 255 to fix the locking cylinder 253 and the drive shaft 261. The connecting wheel 251 and the auxiliary power wheel 2412 are in a meshing state, thereby switching to the automatic drive mechanism 24. The power is generated by the worm gear, the auxiliary power wheel 2412, the connecting wheel 251, the drive shaft 261, and the drive gear 26, forming a complete transmission chain. The locking cylinder 253 is fastened to the end of the drive shaft 261 through the fixing hole 255 and the bolt, locking the axial position of the connecting wheel 251 in the state of meshing with the auxiliary power wheel 2412. It can withstand large vibration and impact loads and ensure that the transmission connection does not loosen under the harsh sea conditions of deep-sea aquaculture. Furthermore, in the circumferential direction, the locking key 254 on the drive shaft 261 cooperates with the locking groove 2531 in the locking cylinder 253 to achieve circumferential fixation (torque transmission) between the drive shaft 261 and the connecting wheel 251.

[0023] In summary, in manual drive mode, by pushing the connecting wheel 251 into the independent release groove 252, the connecting wheel 251 and the auxiliary power wheel 2412 are disengaged. The manual drive mechanism 23 (detachable crank 231) directly acts on the end face of the drive gear 26, thereby driving the tension rack 22 to move. In automatic drive mode, by pulling the connecting wheel 251 out of the release groove 252, the connecting wheel 251 and the auxiliary power wheel 2412 are engaged and locked. Then, the power unit drives the worm gear 242 to rotate, which in turn drives the auxiliary power wheel 2412 to rotate through the worm wheel 241, thereby driving the tension rack 22 to move.

[0024] The manual drive mechanism 23 (detachable crank 231) and the automatic drive mechanism 24 act on the same drive shaft 261 through the connecting mechanism 25 (connecting wheel 251). Both drive methods share a single output shaft, and switching or coupling is achieved through the connecting mechanism 25, resulting in a high degree of structural integration. This enables a physical switch between automatic and manual drive modes; in manual mode, the connecting wheel 251 disengages from the auxiliary power wheel 2412. At this time, when the operator rotates the drive gear 26 using the crank 231, there is no need to drive the worm gear or other internal components of the automatic drive mechanism 24. This fundamentally eliminates the "sudden movement" or jamming caused by internal resistance or accidents in the automatic drive mechanism during manual operation, making operation safer and less strenuous.

[0025] Therefore, in actual operation, staff only need to perform the following steps: a. Switch to manual drive mode: Loosen the fixing hole 255 bolt, push the connecting wheel 251 back to make it enter the release groove 252, and you will hear a "click" locking sound; b. Switch to automatic drive mode: Pull the connecting wheel 251 out of the release groove 252 (the locking mechanism needs to be released), align the locking key 254 with the locking groove 2531, and insert the bolt and tighten it; This process requires no disassembly of any parts (the crank 231 is independent), resulting in fast switching speeds and no risk of losing parts.

[0026] 1.2) During the installation of the auxiliary binding unit 2 onto the cage frame 11, in order for the auxiliary binding unit 2 and the fixed hook 121 to correspond and cooperate, the structure of the auxiliary binding unit 2 also needs to have the characteristics of being able to flexibly arrange multiple positions on the cage frame 11 and having multiple auxiliary binding units 2 arranged on the cage frame 11 simultaneously. Therefore, the fixing area 2102 and the cage frame 11 are provided with several matching assembly structures 3 to install the auxiliary binding unit 2 onto the cage frame 11. The several assembly structures 3 are evenly arranged along the length direction of the edge of the cage frame 11, so that multiple auxiliary binding units 2 can be evenly arranged along the length direction of the cage frame 11 to cooperate with the fixed hook 121. Considering the high humidity and high corrosion environment at sea, or in other words, the auxiliary binding unit 2 can be installed onto multiple positions on the cage frame 11 as needed through the assembly structures 3. The assembly structures 3 include several matching structures opened on the fixing area 2102 and the cage frame 11. The mounting holes 31, the fixing area 2102, and several mounting holes 31 on the cage frame 11 are arranged in a fan shape and connected by bolts; the fan-shaped distribution of mounting holes 31 and bolt fixing serves as the basic assembly structure 3. The multiple mounting holes 31 are arranged along an arc, allowing the auxiliary binding unit 2 to swing at a small angle relative to the cage frame 11 along a mounting hole 31 during installation. This allows the tensioning rack 22 to tighten the net 12 at different angles, which is especially important when making local adjustments to the net 12. Preferably, the mounting holes 31 are usually designed as elongated holes or arc grooves (not shown in the figure). During installation, the angle position of the auxiliary binding unit 2 can be adjusted by simply loosening the bolts without completely removing them. This provides great convenience for on-site fine-tuning and avoids repeated disassembly and reassembly of bolts. The assembly structure 3 also allows the auxiliary binding unit 2 to be installed as an independent functional module on cage frames 11 of different specifications.

[0027] The bolt connection mentioned above is one of the most mature fixing methods for marine cage netting. It has good tensile and shear resistance and is easy to disassemble and maintain. In addition, the assembly structure 3 also includes a screw structure, a turbine screw lifting mechanism, and a wire rope / belt drive mechanism. These structures allow the auxiliary binding unit 2 to move more flexibly along the length of the cage frame 11. However, they are less stable and easier to assemble than bolt connections.

[0028] (2) Regarding the issue of using the loading and unloading structure 4 to fix the netting 12, this case sets up a loading and unloading structure 4 that cooperates with the netting 12 on the inner side of the net frame 11. After the netting 12 is tightened, it plays a final fixing role, replacing the traditional discrete fixing method of multiple manual bindings. Specifically, the loading and unloading structure 4 includes a lower clamping piece 41 and several upper clamping pieces 42. The lower clamping piece 41 is welded to the net frame 11. The netting 12 is set between the upper clamping pieces 42 and the lower clamping pieces 41. Several upper clamping pieces 42 are evenly arranged along the inner edge of the net frame 11. After the netting 12 is tightened by the auxiliary binding unit 2, the upper clamping pieces 42, the lower clamping pieces 41 and the netting 12 are fixedly connected by locking nuts. The upper clamping pieces 42 and the lower clamping pieces 41 are fixedly connected by locking nuts. 1. A gasket 43 (made of rubber, polyurethane, or nylon) is also provided on the side near the netting 12. The lower clamp 41 is welded to the net frame 11, the segmented upper clamp 42 cooperates with the lower clamp 41, the netting 12 is clamped by locking nuts, and the gasket 43 is provided for protection. This design changes the final fixation of the netting 12 from the traditional "multi-point rope binding" to "continuous surface contact clamping". It uses bolts and locking nuts (or anti-loosening nuts) to fix it, replacing the traditional rope binding. The operator only needs to tighten the nuts to complete the fixation. There is no need to tie knots or make experience judgments. It has significant technical effects in terms of installation efficiency, uniform force distribution, maintenance convenience and netting protection.

[0029] The entire upper clamping plate 42 is disassembled into several sections, each of which is installed and fixed independently. In this way, if a part is damaged, a section can be replaced individually with the assistance of the auxiliary binding unit 2, without the need to replace the whole piece. When disassembling, simply loosen the bolts and remove the upper clamping plate 42 to release the entire mesh 12.

[0030] During actual installation, since the mesh 12 is temporarily tightened by the fixed hook 121 and the movable hook 221 on the auxiliary binding unit 2, when fixing the mesh 12 using the loading and unloading structure 4, the segmented upper clamps 42 can be used to fix the mesh 12 in sections along the circumference to ensure the tightness of the entire mesh 12 after fixing. The structure is decoupled according to the three functions of hanging (fixed hook 121), tensioning (auxiliary binding unit 2), and fixing (loading and unloading structure 4) mentioned above, with each function undertaken by a dedicated component; the first is the base. Plate 112 and fixed hook 121 quickly attach and initially position the netting 12. This is different from the final fixation of the netting 12 after it is tightened by the loading and unloading structure 4. The two have clear division of labor and do not interfere with each other. Next, the auxiliary binding unit 2 adjusts the tension. After the loading and unloading structure 4 is tightened, it locks the netting 12. The auxiliary binding unit 2 can be released or kept in a tightened state, which is convenient for quick unlocking and re-tightening during subsequent maintenance. The above process decouples the functions of tensioning and fixing, so that the tension adjustment and fixing of the netting 12 can be operated independently and do not depend on each other.

[0031] Furthermore, in the traditional installation method of the netting 12, the rope binding only fixes the netting 12 at discrete nodes, and the netting 12 is in a free state between nodes, which is prone to local bulging or stress concentration under the action of water flow. However, in this case, the upper clamping plate 42 and the lower clamping plate 41 form a continuous clamping line along the inner side of the net cage frame 11 (approximately continuous after segment splicing), and the netting 12 is clamped in the whole section, and the force is evenly distributed, eliminating the stress concentration caused by the traditional "point fixing". The netting 12 is not easy to tear or wear at the nodes during use.

[0032] (3) Based on the above, a cleaning structure 5 is further added to the net 12. The traditional cleaning process of the net 12 is "untying the whole net ~ recycling to the shore ~ ​​cleaning ~ reinstallation". This net 12 must be untied and recycled to the shore for cleaning. During the cleaning period, the net cage is in a "netless" state, and the fish cannot be farmed normally for a long time, causing production interruption. Moreover, the round trip transportation is time-consuming and labor-intensive. For deep-sea net cages, the transportation cost is high. Therefore, the top of the net cage body 10 is also equipped with a cleaning structure 5 that cooperates with each side of the net 12. The cleaning structure 5 includes a rolling roller 51 and a winch roller 52 that cooperates with the rolling roller 51. During cleaning, the winch roller 52 rolls up the net 12 and passes it through the rolling roller 51. A high-pressure water gun 53 is set between the winch roller 52 and the rolling roller 51 to rinse the net 12 that passes through the rolling roller 51.

[0033] Thus, the cleaning process for the netting 12 in this case is an integrated operation process of "in-situ winding ~ continuous cleaning ~ resetting," which has outstanding technical effects in terms of cleaning efficiency, operation continuity, protection of the netting 12, and cost. Specifically, the winding roller 52 is driven by a motor or hydraulic motor, which can provide sufficient torque to wind up the netting 12; then, the pressing roller 51 cooperates with the winding roller 52. When the netting 12 passes between the pressing rollers 51, the pressing rollers 51 apply a certain pressure to the netting 12, flattening it for easy rinsing by the high-pressure water gun 53; the high-pressure water gun 53 is installed between the pressing rollers 51 and the winding rollers 52, with the nozzle aimed at the surface of the netting 12 after passing through the pressing rollers 51, using the sea... Water, as the cleaning medium, is pressurized by a high-pressure pump (e.g., 20~30MPa) to effectively wash away algae, shellfish, and other fouling organisms attached to the netting 12. Before cleaning, the netting 12 can be released through the loading and unloading structure 4 to make it retractable. After cleaning, the netting 12 is unrolled and restored to tension and fixation through the auxiliary binding unit 2 and the loading and unloading structure 4. In this way, the cleaning operation does not require the netting 12 to be completely disassembled from the net cage. The entire process of rolling, cleaning, and resetting can be completed directly at the top of the net cage. During the cleaning, the main body of the net cage 10 still maintains its complete structure, and the fish can continue to be temporarily kept in the net cage (if only one side of the netting 12 is cleaned, the other three sides of the netting 12 can be retained to maintain basic enclosure, and temporary netting 12 can be used in conjunction).

[0034] Example 2: In Example 1, directly using the crank handle 231 to drive the drive gear 26 is difficult for the operator to operate when the tension is large. To address this, the manual drive mechanism 23 includes an auxiliary gear 233. The auxiliary plate 21 has several arc-shaped mounting slots 232 for the auxiliary gear 233 on the side away from the cage frame 11. The distance between the mounting slots 232 and the drive gear 26 increases progressively along the length of the auxiliary plate 21. This provides multiple selectable center distance positions, with different mounting slots 232 corresponding to different meshing positions between the auxiliary gear 233 and the drive gear 26, effectively forming a multi-stage... The interface for adjusting the transmission ratio—the operator can install the auxiliary gear 233 in different mounting slots 232 as needed, thereby changing the transmission ratio; the diameter of the auxiliary gear 233 is smaller than the diameter of the drive gear 26, and the auxiliary gear 233 meshes with the drive gear 26; the crank handle 231 cooperates with the auxiliary gear 233 to drive the drive gear 26 to rotate through the crank handle 231. In this way, by adjusting the gear ratio of the auxiliary gear 233 and the drive gear 26, the operator can apply a small force through the crank handle 231 to obtain amplified torque at the drive gear 26, thereby overcoming the large resistance when the mesh 12 is tensioned.

[0035] Example 3: A method for installing netting on marine aquaculture cages, utilizing the above-mentioned marine aquaculture cage netting installation system, includes the following steps: S00: Prepare the main body 10 of the cage. Assemble multiple cage units 1 to form the main body 10 of the cage. Confirm that the fixed base plate 112, fixed hook 121, auxiliary binding unit 2, and loading and unloading structure 4 are complete and intact. Select the appropriate specification of netting 12 according to the size of the cage unit 1. S10: The mesh 12 is initially hung up. The front and back sides and the top and bottom directions of the mesh 12 are confirmed. Then, one edge of the mesh 12 is hung on the fixed hook 121 on the fixed base plate 112 in sequence. S20: Adjusting the tightness of the netting 12: First, install multiple auxiliary binding units 2 to their corresponding positions on the wire mesh frame 11 via the assembly structure 3. Then, hook the netting 12 with the movable hooks 221 on the auxiliary binding units 2. Adjust the tightness of the netting 12 synchronously or sequentially using the multiple auxiliary binding units 2 to ensure uniform overall tension of the netting 12. The tightness adjustment methods for the netting 12 include the following two: S21: Manual drive mechanism 23, insert the selected auxiliary gear 233 into the corresponding mounting slot 232, push the connecting wheel 251 into the release slot 252 to disengage it from the auxiliary power wheel 2412, use the crank 231 to drive the auxiliary gear 233 to rotate, drive the drive gear 26 to rotate, and then drive the tension rack 22 to move along the guide rail 211, pulling the net 12 to gradually tighten; S22: Automatic drive mechanism 24 pulls the connecting wheel 251 out of the release groove 252 through the locking cylinder 253 so that it engages with the auxiliary power wheel 2412. At the same time, the locking key 254 on the drive shaft 261 is inserted into the locking groove 2531 of the locking cylinder 253. Then, bolts are inserted into the fixing hole 255 to fix the locking cylinder 253 and the drive shaft 261. The power unit is started to drive the worm gear 242. The worm wheel 241 rotates and drives the auxiliary power wheel 2412, which in turn drives the drive shaft 261 to rotate, thereby realizing automatic tensioning. S30: After the netting 12 is fixed and tensioned in place, place the edge of the netting 12 on the lower clamping plate 41, cover the edge of the netting 12 segment by segment with the upper clamping plate 42 and align it with the lower clamping plate 41, use the locking nut to fix the upper clamping plate 42, the lower clamping plate 41 and the netting 12, and add the gasket 43 to protect the netting 12. After the fixing is completed, the moving hook 221 on the auxiliary binding unit 2 loosens the netting 12. S40: Install the cleaning structure 5, install the rolling roller 51 and the winding roller 52 corresponding to the position of the net 12 on the top of the net body 10, and set a high-pressure water gun 53 between the two rollers that matches the moving direction of the net 12. S50: Check the tension of the mesh 12 and whether the connection points are secure.

[0036] This invention has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. This invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of this invention.

Claims

1. A marine aquaculture cage netting installation system, comprising a cage body (10) formed by splicing together several cage units (1), characterized in that, The cage unit (1) includes a cage frame (11) and a net (12) disposed on the cage frame (11). Two opposing trusses (111) in the cage frame (11) cooperate with each other. One truss (111) is fixed with a base plate (112) along the length direction of its outer edge. The base plate (112) is evenly distributed with a number of fixed hooks (121) that cooperate with the net (12) along the length direction. The other truss (111) is provided with a number of auxiliary binding units (2) along the length direction. After the net (12) is hung on the fixed hook (121), the auxiliary binding units (2) on the opposite truss (111) hook the net (12) to adjust the tightness. The inner edge of the cage frame (11) is also provided with a loading and unloading structure (4) that cooperates with the netting (12) so that after the netting (12) is tightened, the netting (12) is fixed to the cage frame (11) by the loading and unloading structure (4).

2. The marine aquaculture cage netting installation system according to claim 1, characterized in that: The auxiliary binding unit (2) includes an auxiliary plate (21), which includes an adjustment area (2101) and a fixing area (2102) for mounting the auxiliary plate (21) onto the mesh frame (11). The auxiliary plate (21) has a matching tension rack (22) and a drive gear (26) on the side away from the mesh frame (11). The tension rack (22) has a matching movable hook (221) at the end near the mesh (12). The bottom of the auxiliary plate (21) has a guide rail (211) that matches the tension rack (22). The drive gear (2102)... 6) The drive shaft (261) is rotatably connected to the auxiliary plate (21). The axial direction of the drive shaft (261) is perpendicular to the plane direction of the auxiliary plate (21). The drive gear (26) meshes with the tension rack (22). The drive gear (26) drives the tension rack (22) to move along the guide rail (211). The adjustment area (2101) is provided with a manual drive mechanism (23) and an automatic drive mechanism (24) that drive the drive gear (26) to rotate. The manual drive mechanism (23) and the automatic drive mechanism (24) are switched through a connecting mechanism (25).

3. The marine aquaculture cage netting installation system according to claim 2, characterized in that, The manual drive mechanism (23) includes an auxiliary gear (233). The auxiliary plate (21) has several mounting slots (232) for the auxiliary gear (233) in an arc shape on the side away from the cage frame (11). The distance between the mounting slots (232) and the drive gear (26) increases gradually along the length of the auxiliary plate (21). The diameter of the auxiliary gear (233) is smaller than the diameter of the drive gear (26), and the auxiliary gear (233) meshes with the drive gear (26). It also includes a detachable crank handle (231) that cooperates with the auxiliary gear (233) or the drive gear (26) to drive the drive gear (26) to rotate via the crank handle (231).

4. The marine aquaculture cage netting installation system according to claim 2, characterized in that, The automatic drive mechanism (24) includes an active drive structure disposed on the side of the auxiliary plate (21) near the cage frame (11). The active drive structure is a worm gear structure consisting of a worm wheel (241) and a worm (242). The worm wheel (241) is rotatably connected to the auxiliary plate (21) through a secondary rotating shaft (2411). The axial direction of the secondary rotating shaft (2411) is perpendicular to the plane of the auxiliary plate (21), and the axial direction of the worm (242) is perpendicular to the length of the auxiliary plate (21). The directions are parallel, and the two ends of the worm (242) are rotatably connected to the auxiliary plate (21). One end of the worm (242) is provided with a power unit that drives the worm (242) to rotate. The auxiliary shaft (2411) is also provided with an auxiliary power wheel (2412). The worm (242) drives the worm wheel (241) to rotate, and then drives the auxiliary power wheel (2412) to rotate. The auxiliary power wheel (2412) drives the drive shaft (261) to rotate through the connecting mechanism (25).

5. The marine aquaculture cage netting installation system according to claim 4, characterized in that, The connecting mechanism (25) includes a connecting wheel (251) sleeved on the drive shaft (261). The connecting wheel (251) has a snap-fit ​​groove (2511) on the side near the auxiliary plate (21). The auxiliary plate (21) has a release groove (252) that cooperates with the connecting wheel (251). The bottom of the release groove (252) has a snap-fit ​​block (2521) that cooperates with the snap-fit ​​groove (2511). The depth of the release groove (252) is greater than the tooth width of the connecting wheel (251). After the connecting wheel (251) is pushed into the release groove (252), the connecting wheel (251) is disengaged from the auxiliary power wheel (2412), thereby switching to the manual drive mechanism (23). A locking cylinder (253) is fixedly provided on the side of the connecting wheel (251) away from the auxiliary plate (21). A locking key (254) that cooperates with the locking cylinder (253) is fixedly provided on the end of the drive shaft (261) away from the drive gear (26). A locking groove (2531) that cooperates with the locking key (254) is provided on the locking cylinder (253). The end of the drive shaft (261) away from the drive gear (26) and the end of the locking cylinder (253) near the locking key (254) are connected. The drive shaft (261) has a corresponding fixing hole (255). After the locking key (254) on the drive shaft (261) is inserted into the locking groove (2531) of the locking cylinder (253), the end of the drive shaft (261) and the end of the locking cylinder (253) abut against each other. A bolt is inserted into the fixing hole (255) to fix the locking cylinder (253) and the drive shaft (261). The connecting wheel (251) and the auxiliary power wheel (2412) are in a meshing state, thereby switching to the automatic drive mechanism (24).

6. A marine aquaculture cage netting installation system according to claim 3 or 4, characterized in that, The fixed area (2102) and the cage frame (11) are provided with a number of matching assembly structures (3) to install the auxiliary binding unit (2) onto the cage frame (11). The number of assembly structures (3) are evenly arranged along the length direction of the edge of the cage frame (11). The assembly structure (3) includes a number of matching mounting holes (31) opened on the fixed area (2102) and the cage frame (11). The number of mounting holes (31) on the fixed area (2102) and the cage frame (11) are distributed in a fan shape and are fixedly connected by bolts. The assembly structure (3) also includes a screw structure, a worm gear screw lifting mechanism, and a wire rope / belt drive mechanism.

7. A marine aquaculture cage netting installation system according to claim 3 or 4, characterized in that, The loading and unloading structure (4) includes a lower clamping piece (41) and several upper clamping pieces (42). The lower clamping piece (41) is welded to the cage frame (11). The netting (12) is disposed between the upper clamping piece (42) and the lower clamping piece (41). Several upper clamping pieces (42) are evenly arranged along the inner edge of the cage frame (11). After the netting (12) is tightened by the auxiliary binding unit (2), the upper clamping piece (42), the lower clamping piece (41) and the netting (12) are fixedly connected by locking nuts. The upper clamping piece (42) and the lower clamping piece (41) are also provided with a gasket (43) on the side near the netting (12).

8. A marine aquaculture cage netting installation system according to claim 3 or 4, characterized in that, The top of the main body (10) of the net cage is also provided with a cleaning structure (5) that cooperates with each side net (12). The cleaning structure (5) includes a rolling roller (51) and a winding roller (52) that cooperates with the rolling roller (51). During cleaning, the winding roller (52) rolls up the net (12) and passes it through the rolling roller (51). A high-pressure water gun (53) is provided between the winding roller (52) and the rolling roller (51) to rinse the net (12) that has passed through the rolling roller (51).

9. A method for installing netting on marine aquaculture cages, utilizing a marine aquaculture cage netting installation system as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S00: Prepare the main body (10) of the net cage. Splice multiple net cage units (1) to form the main body (10) of the net cage. Confirm that the fixed base plate (112), fixed hook (121), auxiliary binding unit (2), and loading and unloading structure (4) are complete and in good condition. Select the appropriate specification of netting (12) according to the size of the net cage unit (1). S10: The mesh (12) is initially hung. Confirm the front and back sides and the top and bottom directions of the mesh (12). Then, hang one edge of the mesh (12) on the fixed hook (121) on the fixed base plate (112) in sequence. S20: Adjusting the tightness of the netting (12): First, install multiple auxiliary binding units (2) onto the corresponding positions on the net frame (11) through the assembly structure (3). Then, hook the netting (12) with the moving hook (221) on the auxiliary binding unit (2). Adjust the tightness of the netting (12) simultaneously or sequentially to ensure that the overall tension of the netting (12) is uniform. S30: Fix the netting (12). After the netting (12) is tensioned in place, place the edge of the netting (12) on the lower clamp (41). Cover the edge of the netting (12) with the upper clamp (42) section by section and align it with the lower clamp (41). Use the locking nut to fix the upper clamp (42), the lower clamp (41) and the netting (12). Add a gasket (43) to protect the netting (12). After fixing, use the moving hook (221) on the auxiliary binding unit (2) to loosen the netting (12). S40: Install the cleaning structure (5), install the rolling roller (51) and the winding roller (52) corresponding to the position of the net (12) on the top of the net body (10), and set a high-pressure water gun (53) between the two rollers that matches the moving direction of the net (12). S50: Check the tension of the mesh (12) and whether the connection is secure.

10. A method for installing netting in a marine aquaculture cages according to claim 9, characterized in that, In step S20, the tightness adjustment of the mesh (12) includes the following two methods: S21: Manual drive mechanism (23), insert the selected auxiliary gear (233) into the corresponding mounting slot (232), push the connecting wheel (251) into the release slot (252) to disengage it from the auxiliary power wheel (2412), use the crank (231) to drive the auxiliary gear (233) to rotate, drive the drive gear (26) to rotate, and then drive the tension rack (22) to move along the guide rail (211), pulling the net (12) to gradually tighten; S22: The automatic drive mechanism (24) pulls the connecting wheel (251) out of the release groove (252) through the locking cylinder (253) so that it engages with the auxiliary power wheel (2412). At the same time, the locking key (254) on the drive shaft (261) is inserted into the locking groove (2531) of the locking cylinder (253). Then, the bolt is inserted into the fixing hole (255) to fix the locking cylinder (253) and the drive shaft (261). The power unit is started to drive the worm (242). The worm wheel (241) rotates and drives the auxiliary power wheel (2412), which in turn drives the drive shaft (261) to rotate, thereby realizing automatic tensioning.

Images