A method for collecting large yellow croaker by deep-sea culture net cage

Abstract

The application discloses a method for collecting large yellow croakers in a deep-sea culture net cage, and relates to the technical field of deep-sea culture. The method comprises the following steps: step one, assembling a fish driving device; the fish driving device comprises a float, a support, a double-shaft motor, a storage battery, a control element, a vertical rod, a horizontal rod, a mesh, a metal sinker and a cable; step two, installing the fish driving device; step three, collecting large yellow croakers; and step four, disassembling the fish driving device. The method for collecting large yellow croakers is mainly used for a cylindrical deep-sea culture net cage, and is suitable for large yellow croakers and other sciaenids. The fish driving device is convenient to disassemble, carry, maintain, operate and manufacture, and is suitable for deep-sea culture net cages of various sizes. Compared with a direct net lifting mode, the method can effectively reduce the damage of large yellow croakers or other cultured fish, and ensure product quality.

Description

Technical Field

[0001] This invention relates to the field of deep-sea aquaculture technology, and in particular to a method for collecting large yellow croaker in deep-sea aquaculture cages. Background Technology

[0002] The large yellow croaker belongs to the order Perciformes, family Sciaenidae, and genus Croaker. It is a unique endemic marine fish species in my country. The large yellow croaker has the highest single-crop yield and largest-scale aquaculture scale in my country's marine cage culture, and is one of my country's eight most competitive export aquatic products, with an annual output value exceeding 10 billion yuan. The large yellow croaker has otoliths in its brain, making it sensitive to sound. Sound attracts the large yellow croaker to the water surface, a characteristic that can be used to collect them.

[0003] Currently, my country is focusing on the development of deep-sea aquaculture, proposing key tasks to accelerate its development across the entire industry chain, centering on key areas and crucial links in its development. Grain reserves are a major national concern, and aquatic products are an important type of food, capable of increasing total food supply and alleviating pressure on staple grains and livestock products. In recent years, with economic and social development, the rigid demand for marine products among Chinese residents has increased. Given the tightening of aquaculture space on land and in nearshore areas, the potential for aquaculture development lies primarily in the deep sea.

[0004] Currently, my country's deep-sea aquaculture industry is still in its early stages, with the main focus on developing core aquaculture facilities, but supporting infrastructure is relatively weak. The primary method for harvesting fish from deep-sea aquaculture cages is using workboats equipped with fish-suction pumps, which only solves the problem of transferring farmed fish from the cages to the workboat. Given the large water volume in aquaculture cages and the reduced fish density, fish-suction pumps alone are insufficient for harvesting the fish; it is necessary to reduce the swimming space for them. Most current aquaculture cages adopt an integrated design, incorporating net-lifting devices into the cage structure. This approach is costly, consumes a lot of electricity, and is difficult to maintain. Summary of the Invention

[0005] The main objective of this invention is to provide a method for collecting large yellow croaker in deep-sea aquaculture cages, in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides a method for collecting large yellow croaker in deep-sea aquaculture cages, comprising the following steps:

[0007] Step 1: Assemble the fish-driving device; Use a workboat to transport the various parts of the fish-driving device to the middle of the deep-sea aquaculture cages and assemble them.

[0008] The fish-driving device includes a float, a support frame, a dual-shaft motor, a battery, a control element, a vertical pole, a horizontal bar, a net, a metal weight, and a cable. A circular channel is provided in the center of the float, and four fixing rings are evenly arranged around its perimeter. The support frame and battery are mounted on top of the float, and the control element is mounted above the battery. The dual-shaft motor is slidably inserted into the support frame, allowing it to move up and down while remaining horizontally fixed. The battery is electrically connected to the control element, and the control element is electrically connected to the dual-shaft motor. One end of the motor shaft of the dual-shaft motor faces downwards and passes through the circular channel of the float. It is equipped with a drive gear, with the other end facing upwards and equipped with a winch; there are two uprights, one end of which is connected to the bottom of the pontoon via a bearing, and a driven gear is installed on the upright. The driven gears on the two uprights mesh with each other, and the drive gear meshes with one of the driven gears; a crossbar is installed horizontally on the upright; multiple horizontal hooks are evenly arranged on the crossbar; the top of the net is fixed to the cross hooks, and multiple metal weights are installed at the bottom of the net; the cable is threaded through the bottom of the net, with a certain length reserved at both ends and tied to the free ends of the two crossbars respectively;

[0009] Step 2: Install the fish-driving device; gather the horizontal bars together so that the net covers the vertical poles, and place the float in the center of the deep-sea aquaculture cage. The deep-sea aquaculture cage is cylindrical. Four fixing ropes are used to connect the float and the deep-sea aquaculture cage. One end of the fixing rope is connected to the fixing ring of the float, and the other end is connected to the edge of the deep-sea aquaculture cage. The four fixing ropes are arranged in a cross shape to fix the float on the water surface in the center of the deep-sea aquaculture cage.

[0010] Step 3: Collect large yellow croakers; turn on the dual-shaft motor through the control element. The dual-shaft motor drives the two crossbars to rotate relative to each other, which causes the net to reduce the swimming space of the large yellow croakers. When the density is suitable, turn off the dual-shaft motor. The workboat uses a fish suction pump or a net to collect the large yellow croakers. When the density of large yellow croakers decreases, repeat the above operation.

[0011] Step 4: Disassemble the fish-driving device; disassemble the various parts of the fish-driving device, place them on the work boat, and return to port.

[0012] Furthermore, in step three, when the remaining space becomes difficult to maneuver, the cable is untied from the crossbar, then the two ends of the cable are crossed and passed around two fixed points on the deep-sea aquaculture cage, and the returned cable is fixed to the winch above the dual-axis motor. The fixed points are railings or buckles. The dual-axis motor is raised with pads so that the drive gear below the dual-axis motor is disengaged from the driven gear on the upright. The dual-axis motor is started, driving the cable to slowly raise the net, continuing to shrink the space for the large yellow croaker, and the remaining large yellow croaker are transferred.

[0013] Furthermore, the pontoon is cylindrical in shape, wider at the bottom and narrower at the top. A cavity is provided at the middle of the top and bottom of the pontoon. The support and the battery are located in the cavity at the top, and the drive gear and the driven gear are located in the cavity at the bottom.

[0014] Furthermore, the pontoon is made entirely of plastic, and the cavity at the top of the pontoon is smaller than the cavity at the bottom.

[0015] Furthermore, the crossbar is equipped with multiple vertical hooks for fixing the netting, and the vertical hooks are located above the water surface.

[0016] Furthermore, a short plastic rod is connected to the end of the crossbar away from the upright, and the total length of the two crossbars matches the diameter of the deep-sea aquaculture cage.

[0017] Furthermore, it also includes a remote controller, which is signal-connected to the control element.

[0018] Furthermore, the metal pendants are long strips of metal and are arranged in pairs.

[0019] Furthermore, the mesh is made of a lightweight material, and the mesh openings are slightly smaller than those of the large yellow croaker.

[0020] Furthermore, the diameter of the crossbar is smaller than the diameter of the upright, the upright is provided with a screw hole, and one end of the crossbar is provided with a thread that matches the screw hole.

[0021] The present invention has the following beneficial effects:

[0022] The method for collecting large yellow croaker provided by this invention is mainly designed for cylindrical deep-sea aquaculture cages. Besides large yellow croaker, it is also applicable to other croaker species. The fish-driving device is not only easy to assemble and disassemble, and portable, but also easy to maintain, simple to operate, and low in manufacturing cost. The crossbars and netting can be lengthened or replaced to suit deep-sea aquaculture cages of various sizes. Compared to directly hauling in the net, this method effectively reduces damage to large yellow croaker or other farmed fish, ensuring product quality. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall fish-driving device of the present invention.

[0024] Figure 2 This is a schematic diagram of the pad block of the fish-driving device of the present invention.

[0025] Figure 3 This is a schematic diagram of the fish harvesting state according to the present invention.

[0026] Figure 4 This is a schematic diagram of the net-closing state according to the present invention.

[0027] Among them, 1-buoy; 2-fixing ring; 3-bearing; 4-battery; 5-control element; 6-dual-shaft motor; 7-support; 8-winch; 9-drive gear; 10-crossbar; 11-horizontal hook; 12-vertical hook; 13-short plastic rod; 14-cable; 15-net; 16-metal sinker; 17-driven gear; 18-upright pole; 19-workboat; 20-fish suction pump; 21-provisional fish collection location; 22-deep-sea aquaculture cage; 23-fixing rope; 24-pad; 25-fixing point. Detailed Implementation

[0028] To achieve the above objectives and effects, the technical means and structure adopted by the present invention will be described in detail with reference to the accompanying drawings, focusing on the features and functions of the preferred embodiments of the present invention.

[0029] like Figure 1-4 As shown, this invention provides a method for collecting large yellow croaker in deep-sea aquaculture cages, comprising the following steps:

[0030] Step 1: Assemble the fish-driving device; Use the workboat 19 to transport the various parts of the fish-driving device to the middle of the deep-sea aquaculture cage 22 and assemble them.

[0031] The fish-driving device includes a float 1, a support 7, a dual-axis motor 6, a battery 4, a control element 5, a vertical pole 18, a horizontal bar 10, a net 15, a metal weight 16, and a cable 14. A circular channel is provided in the center of the float 1, and four fixing rings 2 are evenly arranged around the float 1. The support 7 and the battery 4 are bolted to the top of the float 1. The control element 5 is installed above the battery 4. The dual-axis motor 6 is slidably inserted into the support 7, allowing it to move up and down while maintaining horizontal stability. A plastic protective pad is installed inside the support 7 to prevent the dual-axis motor 6 from being scratched or damaged. The battery 4 is electrically connected to the control element 5, and the control element 5 is electrically connected to the dual-axis motor 6. One end of the motor shaft of the dual-axis motor 6 faces downwards, passes through the circular channel of the float 1, and is equipped with a drive gear 9; the other end faces upwards. A winch 8 is installed; two uprights 18 are provided, and the length of the uprights 18 does not need to reach the depth of the deep-sea aquaculture cage 22; one end of the upright 18 is connected to the bottom of the float 1 through a bearing 3, and a driven gear 17 is installed on the upright 18. The driven gears 17 on the two uprights 18 mesh with each other, and the drive gear 9 meshes with one of the driven gears 17; a horizontal bar 10 is installed on the upright 18; multiple horizontal hooks 11 are evenly arranged on the horizontal bar 10; the net 15 is made of a lightweight material, and the mesh size is slightly smaller than that of the large yellow croaker. The top of the net 15 is fixed to the horizontal hook 11, and multiple metal weights 16 are provided and installed at the bottom of the net 15; the cable 14 is threaded through the bottom of the net 15, and a certain length is reserved at both ends of the cable 14 and tied to the free ends of the two horizontal bars 10 respectively;

[0032] Step 2: Install the fish-driving device; gather the horizontal bars 10 together so that the net 15 wraps around the vertical pole 18, and place the float 1 in the center of the deep-sea aquaculture cage 22. The deep-sea aquaculture cage 22 is cylindrical. Four fixing ropes 23 are used to connect the float 1 and the deep-sea aquaculture cage 22. One end of the fixing rope 23 is connected to the fixing ring 2 of the float 1, and the other end is connected to the edge of the deep-sea aquaculture cage 22. The four fixing ropes 23 are arranged in a cross shape to fix the float 1 on the water surface in the center of the deep-sea aquaculture cage 22.

[0033] Step 3: Collect large yellow croakers; turn on the dual-axis motor 6 through the control element 5. The dual-axis motor 6 drives the two crossbars 10 to rotate relative to each other, which drives the net 15 to reduce the swimming space of the large yellow croakers. When the density is suitable, turn off the dual-axis motor 6. The work boat 19 uses the fish suction pump 20 or the net to collect the large yellow croakers at the temporary fish collection position 21. When the density of large yellow croakers decreases, repeat the above operation.

[0034] Step 4: Disassemble the fish-driving device; disassemble the various parts of the fish-driving device, place them on workboat 19, and return to port.

[0035] In another embodiment, in step three, when the remaining space is difficult to operate, the cable 14 is untied from the crossbar 10, and then the two ends of the cable 14 are crossed and passed around the two fixing points 25 on the deep-sea aquaculture cage 22 respectively. The returned cable 14 is then fixed to the winch 8 above the dual-axis motor 6. The fixing point 25 is a railing or a buckle. The dual-axis motor 6 is raised with a pad 24 so that the drive gear 9 below the dual-axis motor 6 is disengaged from the driven gear 17 on the upright 18. The dual-axis motor 6 is started, driving the cable 14 to slowly raise the net 15, continue to shrink the space for the large yellow croaker, and transfer the remaining large yellow croaker.

[0036] In another embodiment, the float 1 is a cylindrical shape that is larger at the bottom and smaller at the top. The top and bottom of the float 1 are provided with concave cavities. The bracket 7 and the battery 4 are located in the concave cavity at the top, which facilitates fixation and lowers the center of gravity, thereby improving stability. The drive gear 9 and the driven gear 17 are located in the concave cavity at the bottom to prevent contact with the water surface and corrosion.

[0037] In another embodiment, the float 1 is made entirely of plastic, and the cavity at the top of the float 1 is smaller than the cavity at the bottom, which makes it easier for the float 1 to float on the water surface.

[0038] In another embodiment, the crossbar 10 is provided with a plurality of vertical hooks 12 for fixing the net, the vertical hooks 12 being located above the water surface. This ensures that the net 15 is at a certain height above the water surface, preventing the large yellow croaker from jumping out of the temporary fish-catching position 21.

[0039] In another embodiment, a short plastic rod 13 is connected to the end of the crossbar 10 away from the upright 18. The total length of the two crossbars 10 matches the diameter of the deep-sea aquaculture cage 22, so that the two crossbars 10 can cover the entire deep-sea aquaculture cage 22, while the short plastic rod 13 can act as a buffer between the crossbars 10 and the deep-sea aquaculture cage 22, preventing the deep-sea aquaculture cage 22 from getting stuck on the crossbars 10 during rotation.

[0040] In another embodiment, a remote controller is also included, which is signal-connected to the control element 5. The workboat 19 retreats to the side of the deep-sea aquaculture cage 22, and the start and stop of the dual-axis motor 6 are controlled by the remote controller, making it more convenient.

[0041] In another embodiment, the metal weights 16 are elongated metal strips, arranged in pairs. The metal weights 16 can both stretch the net 15 and, in addition, the paired elongated metal strips can collide with each other to produce a sound, thus driving away the large yellow croaker.

[0042] In another embodiment, the diameter of the crossbar 10 is smaller than the diameter of the upright 18, the upright 18 is provided with a screw hole, and one end of the crossbar 10 is provided with a thread that matches the screw hole. When assembling and disassembling the fish-driving device, only the crossbar 10 and the net 15 need to be disassembled, reducing the difficulty of assembly and disassembly. The crossbar and the net can be lengthened or replaced to suit various sizes of deep-sea aquaculture cages 22.

[0043] The above description is only a preferred embodiment of the present invention and not all embodiments. Anyone should know that structural changes made under the guidance of the present invention, and any technical solutions that are the same as or similar to the present invention, are within the protection scope of the present invention.

Claims

1. A method for collecting large yellow croaker in cylindrical deep-sea aquaculture cages, characterized in that, Includes the following steps: Step 1: Assemble the fish-driving device; Use a workboat to transport the various parts of the fish-driving device to the middle of the deep-sea aquaculture cages and assemble them. The fish-driving device includes a float, a support frame, a dual-shaft motor, a battery, a control element, uprights, crossbars, a net, metal weights, and cables. A circular channel is provided in the center of the float, and four fixing rings are evenly arranged around its perimeter. The support frame and battery are mounted on top of the float, and the control element is mounted above the battery. The dual-shaft motor is slidably inserted into the support frame, allowing it to move up and down while remaining horizontally fixed. The battery is electrically connected to the control element, and the control element is electrically connected to the dual-shaft motor. One end of the motor shaft of the dual-shaft motor faces downwards, passes through the circular channel of the float, and is fitted with a drive gear; the other end faces upwards and is fitted with a winch. Two uprights are provided, one end of which is connected to the bottom of the float via a bearing. Driven gears are mounted on the uprights, and the driven gears on the two uprights mesh with each other. The drive gear meshes with one of the driven gears. A crossbar is horizontally mounted on the uprights. Multiple... The netting consists of several horizontal hooks; the top of the netting is fixed to the horizontal hooks; multiple metal weights are provided, installed at the bottom of the netting, and the metal weights are long strips of metal, arranged in pairs; the cable is threaded through the bottom of the netting, with a certain length reserved at both ends and tied to the free ends of two horizontal bars respectively; the float is cylindrical in shape, wider at the bottom and narrower at the top, with cavities in the middle of the top and bottom; the support and battery are located in the top cavity, and the drive gear and driven gear are located in the bottom cavity; the float is made entirely of plastic, with the top cavity smaller than the bottom cavity; multiple vertical hooks for fixing the netting are provided on the horizontal bars, and the vertical hooks are located above the water surface; a short plastic rod is connected to the end of the horizontal bar away from the vertical bar, and the total length of the two horizontal bars matches the diameter of the deep-sea aquaculture cage; the diameter of the horizontal bar is smaller than the diameter of the vertical bar, the vertical bar has screw holes, and one end of the horizontal bar has a thread that matches the screw holes; Step 2: Install the fish-driving device; gather the horizontal bars together so that the net covers the vertical poles, place the buoy in the center of the deep-sea aquaculture cage, and use four fixing ropes to connect the buoy and the deep-sea aquaculture cage. One end of the fixing rope is connected to the fixing ring of the buoy, and the other end is connected to the edge of the deep-sea aquaculture cage. The four fixing ropes are arranged in a cross shape to fix the buoy on the water surface in the center of the deep-sea aquaculture cage. Step 3: Collect large yellow croakers; turn on the dual-shaft motor via the control element. The dual-shaft motor drives the two crossbars to rotate relative to each other, causing the net to reduce the swimming space of the large yellow croakers. When the density is suitable, turn off the dual-shaft motor, and the workboat uses a fish suction pump or a net to collect the large yellow croakers; repeat the above operation when the density of large yellow croakers decreases; when the remaining space is difficult to operate, untie the cable from the crossbar, then cross the two ends of the cable and pass them around the two fixed points on the deep-sea aquaculture cage, and then fix the returned cable to the winch above the dual-shaft motor. The fixed points are railings or buckles; use pads to raise the dual-shaft motor so that the drive gear below the dual-shaft motor is disengaged from the driven gear on the upright. Start the dual-axis motor to drive the cable and slowly raise the net to continue shrinking the space for the large yellow croakers, and transfer the remaining large yellow croakers. Step 4: Disassemble the fish-driving device; When disassembling the fish-driving device, only the crossbars and nets need to be disassembled to reduce the difficulty of disassembly and assembly. The crossbars and nets can be lengthened or replaced to suit various sizes of deep-sea aquaculture cages. It also includes a remote controller, which is signal-connected to the control element.

2. The method for collecting large yellow croaker in a cylindrical deep-sea aquaculture cage as described in claim 1, characterized in that, The netting is made of a lightweight material, and the mesh size is slightly smaller than that of the large yellow croaker.

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