Fish lifting machine device and fish passing operation method based on same

Abstract

The invention discloses a fish lifting machine device which comprises a fish guide grid and an annular connecting base set, the annular connecting base set comprises a movable ring and a fixed ring, a guide stand column penetrates through a guide ring of the fixed ring, a lifting motor is arranged on an upper end panel of the guide stand column, and a connecting rope of the lifting motor is used for pulling a fish collecting box; a magnetic sucker is arranged at the end of the telescopic mechanism outside the guide ring, a fish guide grid fixed to the outer wall of the movable ring is provided with a fish collection box retention shell and a fish inlet gate, buoyancy adjusting water bags with electric control valves are arranged on the two sides of the fish guide grid, and a fish isolation door plate of a special structure is arranged at the end of the fish guide grid. The operation method comprises the steps that the fish collecting box is lowered through the lifting motor, the telescopic mechanism and the magnetic suction cup are matched to move the fish collecting box to the indwelling shell, fishes are guided into the fish collecting box through the fish guide grid, then the lifting motor lifts and unloads the fishes, and non-target fishes can be screened. By means of the structure and the method, fishes can be efficiently guided, the lifting process is stable, the device can adapt to different water area environments, operation is convenient and fast, and great significance is achieved for protecting the diversity of aquatic organisms.

Description

Technical Field

[0001] The invention relates to the technical field of fish passing through dams, and in particular to a fish lifting device and a fish passing operation method based on the device. Background Art

[0002] While the construction of water-blocking structures like dams and sluices in water conservancy projects plays an important role in flood control, power generation, and irrigation, they also, to a certain extent, block the natural migration pathways of fish, negatively impacting the integrity of aquatic ecosystems and the sustainable development of fish stocks. To alleviate this problem, fish lifts have emerged as a crucial fish-passing facility. Their primary function is to help fish cross water-blocking structures, enabling them to migrate and reproduce. Currently, existing fish elevators still have some shortcomings in practical application. For example, the fish guide structure of some fish elevators is not effective, resulting in low fish entry efficiency and fish escaping easily during the guidance process. The lifting mechanism of some fish elevators is not stable enough, which may cause shaking when lifting the fish collection box, affecting the safety and reliability of the lifting. In addition, the adaptability of existing fish elevators to different water environments needs to be improved. When the water level changes, it is difficult for them to quickly adjust their position and status to ensure the fish passing effect. At the same time, some fish elevators lack a high degree of automation during the fish-passing process, requiring extensive manual intervention. This not only increases operator workload but also reduces fish-passing efficiency. Furthermore, existing devices often lack effective mechanisms for handling non-target fish that enter the fish guide structure, easily interfering with the collection and lifting of target fish. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fish lifting device and a fish passing operation method based on the device, which can improve the fish guiding efficiency, enhance the lifting stability, adapt to different water environments and improve the degree of automation, and has important practical significance for improving fish migration channels and protecting aquatic biodiversity.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: a fish elevator device, including a fish guide grid and an annular connecting seat assembly, the annular connecting seat assembly including a movable ring located below and a fixed ring movably arranged above the movable ring, the fixed ring extending inwardly to be provided with a plurality of guide rings, the guide rings are penetrated by guide posts, the upper ends of the guide posts are provided with a panel, the panel is provided with a lifting motor, and the lifting motor is provided with a connecting rope for pulling the fish collecting box; A telescopic mechanism is fixedly provided on the outside of the guide ring, the telescopic direction of the telescopic mechanism is horizontal, and a magnetic suction cup is provided at the end of the telescopic mechanism; A fish guide fence is fixed on the outer wall of the movable ring; one end of the fish guide fence is provided with a fish collecting box retention shell; and the middle part of the fish guide fence is provided with a fish inlet gate.

[0005] In a preferred solution, buoyancy regulating water bags are provided on both sides of the fish guide fence, and hard water inlet pipes are provided on the buoyancy regulating water bags, and electric control valves are provided on the water inlet pipes.

[0006] In a preferred embodiment, the fish guide grid is provided with a convex wall on one side of the inner end away from the fish collecting box retention shell, and the side of the convex wall facing the fish inlet gate is an arc-shaped wall surface; A fish-isolating door plate is provided on one end of the fish-guide fence away from the fish collecting box retention shell, and the fish-isolating door plate includes a fixed fish-isolating door plate fixedly connected to one side of the fish-guide fence port and a movable fish-isolating door plate provided on a rotating shaft; The movable fish-isolating door plate and the fixed fish-isolating door plate are both composed of a plurality of plate members distributed in the vertical direction, and the plate members constituting the movable fish-isolating door plate and the fixed fish-isolating door plate are staggered in the vertical direction.

[0007] In a preferred solution, the movable fish-isolating door plate rotates unidirectionally along the rotating shaft and fits against the arc-shaped wall surface.

[0008] In a preferred solution, the fish guide grid is provided with a fish outlet gate on a portion of the side wall between the fish inlet gate and the fish separation gate plate.

[0009] In a preferred solution, a hook is provided on the top of the fish collecting box to cooperate with the connecting rope on the lifting motor.

[0010] In a preferred solution, two traction motors are provided on the panel at the upper end of the guide column, and the reset traction ropes on the two traction motors are connected to the corner points on both sides of the top surface of the fish inlet end of the fish guide grid.

[0011] In a preferred solution, a one-way fish inlet is provided on the side of the fish collecting box facing the guide fish fence. The one-way fish inlet is a variable diameter mechanism, and its cross-sectional diameter gradually decreases from the fish inlet direction.

[0012] The fish passing operation method based on the above-mentioned fish lifting device includes the following steps: 1) Use the lifting motor and the connecting rope to lower the fish collecting box vertically to the level of the fish guide grid; 2) Control the telescopic mechanism and use the magnetic suction cup to absorb the fish collecting box; 3) The telescopic mechanism continues to move and pushes the fish collecting box to move horizontally until the fish collecting box enters the fish collecting box retention shell; 4) The movable fish-isolating gate rotates by controlling the rotating shaft, allowing the target fish to enter the fish guide fence; 5) Open the fish inlet gate to allow the target fish to enter the fish collection box; 6) The telescopic mechanism retracts and drives the fish collecting box out of the fish collecting box retention shell and moves to the bottom of the lifting motor; 7) Use the lifting motor to lift the fish collecting box to the panel close to the lifting motor; 8) Manually unload the fish and complete the fish lifting operation.

[0013] In a preferred embodiment, in step 5), before opening the fish inlet gate, it is determined whether the fish in the fish guide fence are target fish; if they are non-target fish, the fish outlet gate is opened to allow the non-target fish to migrate to the outside; Before step 6), according to the direction of the fish guide fence after self-adjustment with the water flow, the traction motor is controlled to retract the rope and then adjust the fish guide fence to reset to the initial state, and then the telescopic mechanism is retracted.

[0014] The fish elevator device and the fish passing operation method based on the device provided by the present invention have the following beneficial effects by adopting the above-mentioned structure and method: (1) The buoyancy regulating water bags installed on both sides of the fish guide fence can adjust the water inlet through the electric control valve, flexibly changing the buoyancy state of the fish guide fence in the water, thereby realizing the height adjustment of the fish guide fence in the water, ensuring that the fish guide path is always at a height suitable for fish to enter; (2) The fish gate at the end of the fish guide fence can not only effectively prevent fish from escaping in the opposite direction, but also guide the target fish to enter the fish guide fence smoothly, which greatly improves the directionality and efficiency of fish guidance. The coordinated setting of the fish inlet gate and the fish outlet gate can screen non-target fish during the fish guidance process and release them back to the natural waters by opening the fish outlet gate; (3) The coordinated structure of the guide ring and the guide column provides a stable guide for the lifting motor to drive the fish collecting box to rise and fall, effectively avoiding the shaking of the fish collecting box during the lifting or lowering process, and ensuring the stability of the operation process; (4) After the fish guide fence rotates with the water flow, it is reset and the fish are lifted by the traction motor, which can avoid the problem of the fish collecting box not being able to operate normally due to interference from the guide columns during the reset process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and examples: Figure 1 This is a schematic diagram of the overall structure of the present invention. (Telescopic mechanism retracted state) Figure 2 This is a schematic diagram of the overall structure of the present invention. (Telescopic mechanism extended state) Figure 3 It is a structural schematic diagram of the present invention from another perspective.

[0016] Figure 4 This is a structural schematic diagram of the fish inlet end of the fish guide grid of the present invention.

[0017] Figure 5 It is a schematic diagram of the overall corrosion structure of the present invention.

[0018] Figure 6 It is a structural schematic diagram of the fish guide fence resetting mechanism of the present invention.

[0019] Figure 7 It is a structural schematic diagram of the fish collecting box of the present invention.

[0020] In the figure: a buoyancy regulating water bag 1, a fish collecting box 2, a fish inlet gate 3, a convex wall 4, a curved wall 5, a rotating shaft 6, a fixed fish partition door panel 7, a movable fish partition door panel 8, a fish outlet gate 9, a fish guide grid 10, a hook 11, an annular connecting seat assembly 12, a lifting motor 13, a guide column 14, a connecting rope 15, a movable ring 16, a guide ring 17, a fixed ring 18, a telescopic mechanism 19, an electrically controlled valve 20, a fish collecting box retention housing 21, a magnetic suction cup 22, a traction motor 23, and a reset traction rope 24. DETAILED DESCRIPTION

[0021] Example 1: A fish elevator device includes a fish guide grid 10 and an annular connecting seat assembly 12. The annular connecting seat assembly 12 includes a movable ring 16 located below and a fixed ring 18 movably arranged above the movable ring 16. The fixed ring 18 extends inwardly to form a plurality of guide rings 17. Guide posts 14 are inserted into the guide rings 17. The upper ends of the guide posts 14 are provided with a panel, on which a lifting motor 13 is installed. The lifting motor 13 is provided with a connecting rope 15 for pulling the fish collecting box 2. A telescopic mechanism 19 is fixedly provided on the outside of the guide ring 17. The telescopic mechanism 19 is horizontally telescopic. A magnetic chuck 22 is provided at the end of the telescopic mechanism 19. A fish guide fence 10 is fixed on the outer wall of the movable ring 16 , one end of the fish guide fence 10 is provided with a fish collecting box retention shell 21 , and the middle of the fish guide fence 10 is provided with a fish inlet gate 3 .

[0022] In a preferred solution, buoyancy regulating water bags 1 are provided on both sides of the fish guide fence 10 , and a hard water inlet pipe is provided on the buoyancy regulating water bag 1 , and an electric control valve 20 is provided on the water inlet pipe.

[0023] In a preferred embodiment, the fish guide fence 10 is provided with a convex wall 4 on one side of the inner end away from the fish collecting box retention housing 21, and the side of the convex wall 4 facing the fish inlet gate 3 is an arc-shaped wall 5; A fish isolation door plate is provided on one end of the fish guide fence 10 away from the fish collecting box retention housing 21, and the fish isolation door plate includes a fixed fish isolation door plate 7 fixedly connected to one side of the end of the fish guide fence 10 and a movable fish isolation door plate 8 provided on the rotating shaft 6; The movable fish-isolating door plate 8 and the fixed fish-isolating door plate 7 are both composed of a plurality of plate members distributed in the vertical direction, and the plate members constituting the movable fish-isolating door plate 8 and the fixed fish-isolating door plate 7 are staggered in the vertical direction.

[0024] In a preferred solution, the movable fish-isolating door plate 8 rotates unidirectionally along with the rotating shaft 6 and fits against the arc-shaped wall surface 5 .

[0025] In a preferred solution, the fish guide fence 10 is provided with a fish outlet gate 9 on a portion of the side wall between the fish inlet gate 3 and the fish separation gate plate.

[0026] In a preferred solution, a hook 11 is provided on the top of the fish collecting box 2 to cooperate with the connecting rope 15 on the lifting motor 13.

[0027] In a preferred solution, two traction motors 23 are provided on the panel at the upper end of the guide column 14 , and the reset traction ropes 24 on the two traction motors 23 are connected to the corner points on both sides of the top surface of the fish inlet end of the fish guide grid 10 .

[0028] In a preferred solution, a one-way fish inlet 201 is provided on the side of the fish collecting box 2 facing the fish guide grid 10. The one-way fish inlet 201 is a variable diameter mechanism, and its cross-sectional diameter gradually decreases in the fish feeding direction.

[0029] The fish passing operation method based on the above-mentioned fish lifting device comprises the following steps: 1) The fish collecting box 2 is lowered vertically to the level of the fish guide fence 10 by means of the lifting motor 13 and the connecting rope 15; 2) Control the telescopic mechanism 19 to move and rely on the magnetic chuck 22 to absorb the fish collecting box 2; 3) The telescopic mechanism 19 continues to move and pushes the fish collecting box 2 to move laterally until the fish collecting box 2 enters the fish collecting box retention housing 21; 4) The movable fish-isolating gate plate 8 is driven to rotate by controlling the rotating shaft 6, so that the target fish enters the fish guide fence 10; 5) Open the fish inlet gate 3 to allow the target fish to enter the fish collection box 2; 6) The telescopic mechanism 19 retracts, driving the fish collecting box 2 to separate from the fish collecting box retention housing 21 and move it to the position directly below the lifting motor 13; 7) Lift the fish collecting box 2 to a position close to the panel where the lifting motor 13 is located by means of the lifting motor 13; 8) Manually unload the fish and complete the fish lifting operation.

[0030] In a preferred embodiment, in step 5), before opening the fish inlet gate 3, it is determined whether the fish in the fish guide fence 10 are target fish. If they are non-target fish, the fish outlet gate 9 is opened to allow the non-target fish to migrate to the outside. Before step 6), according to the direction of the fish guide fence 10 after self-adjustment with the water flow, the traction motor 23 is controlled to retract the rope and adjust the fish guide fence 10 to reset to the initial state, and then the telescopic mechanism 19 is retracted.

[0031] Example 2: As shown in the accompanying drawings, a buoyancy-adjusting water bladder 1 is fixed to either side of a fish guide grating 10. Because the speed and direction of water flow may vary at different water depths, the ability of fish to successfully enter the fish collection box 2 becomes a major concern. This device, by providing a buoyancy-adjusting water bladder 1 to control the weight of the water within, can adjust its buoyancy in real time, allowing the fish guide grating 10 to flexibly move through different water layers. The buoyancy-adjusting water bladder 1 also helps maintain the stability of the grating, preventing positional shifts caused by water flow fluctuations. This improves fish collection efficiency and operational flexibility, ensuring fish collection efficiency. The buoyancy-adjusting water bladder 1 works in conjunction with the fish guide grating 10 to form a controllable channel, guiding fish in a directional manner and ensuring their successful entry into the box.

[0032] The movable fish-isolating door panel 8, the fixed fish-isolating door panel 7, the rotating shaft 6, the convex wall 4 and the curved wall surface 5 thereon together constitute a one-way passage for fish. With the rotating shaft 6 as the center, three movable fish-isolating door panels 8 are set. The movable fish-isolating door panels 8 are fixed on the shaft and rotate, and the angle between each rotating door panel is 120 degrees. Due to the constraint of the convex wall 4, the water flow impacts the movable fish-isolating door panel 8, so that the movable fish-isolating door panel 8 can only rotate in a single direction. At the same time, the curved wall surface 5 and the movable fish-isolating door panel 8 can be tightly fitted together, preventing fish from entering the system along the side wall. The movable fish-isolating door panel 8 and the fixed fish-isolating door panel 7 adopt a tooth-like structure composed of multiple horizontal plates on the vertical surface. The teeth on the movable fish-isolating door panel 8 and the fixed fish-isolating door panel 7 are alternately arranged, and the gap between them should be smaller than the body height of the target fish, thereby preventing other fish from moving freely.

[0033] Fish discharge gate 9 can be controlled by external control system. If non-target fish enter into whole system, can control fish discharge gate 9 to open, guide non-target fish to leave.

[0034] The fish feeding system mainly includes: a fish collecting box 2, a fish guide fence 10, a hook 11, a movable ring 16, a guide ring 17, a fixed ring 18, a telescopic mechanism 19, and a magnetic suction cup 22.

[0035] The fish guide 10 is made of lightweight, low-cost polymer materials. Its flexibility and smooth surface allow it to be manufactured in various shapes and sizes, while minimizing damage to fish. To maximize fish guidance efficiency, the fish guide 10 is often tilted according to the direction and speed of the water flow. Setting the ideal tilt angle helps reduce resistance to fish movement and increases the likelihood of them being guided into the fish elevator.

[0036] A ring-shaped connecting seat assembly 12 is provided at the front end of the fish guide screen. The assembly is primarily composed of a movable ring 16, a guide ring 17, and a fixed ring 18. The ring-shaped connecting seat assembly 12 can adjust the deflection angle of the fish attracting system in the water based on factors such as the location of the fish school and the direction of the water flow, allowing fish from various water depths and different directions to smoothly enter the fish collection box. The movable ring 16 is movably disposed below the fixed ring 18, allowing the entire fish attracting system to shift in angle as the water flows and changes in water depth, to accommodate fish from different directions. The guide ring 17 is fixed within the fixed ring 18 and fits over the guide column 14, enabling the entire system to be adjusted vertically in the water, facilitating changes in depth based on the different water layers as the target fish swim upstream.

[0037] A hook 11 is provided at the top of the fish collection box 2, allowing for quick and easy attachment and removal of the connecting rope 15 from the lifting motor 13. A telescopic mechanism 19 is fixedly connected to the guide ring 17. When the number of fish in the fish collection box reaches its peak, the control unit controls the traction motor 23 in conjunction with the reset traction rope 24 to rotate the fish guide screen 10 to its initial position. The telescopic mechanism 19 then extends, attracting the fish collection box 2 via the magnetic suction cup 22 at its front end. The telescopic mechanism 19 then retracts, pulling the fish collection box 2 closer to the fish transport system. When the fish collection box 2 completes its operation, the connecting rope 15 releases the fish collection box 2 into the water, whereupon the telescopic mechanism 19 extends again, pushing the fish collection box 2 into the fish attracting system for the next stage of operation.

[0038] The fish transport system mainly includes: a lifting motor 13, a guide column 14, and a connecting rope 15.

[0039] After receiving the instruction from the control system, the lifting motor 13 starts to operate to lift the fish in the fish collecting box 2 in the vertical direction.

[0040] The guide posts 14 are the primary support for the fish lift, ensuring the entire device remains stable under natural conditions such as water flow, preventing displacement or tilt. They also help protect the internal mechanical equipment from external physical damage, such as impacts from floating objects or other external forces, thereby ensuring safe operation and extending the life of the device.

[0041] The connecting rope 15 is driven by the lifting motor 13 to rotate the reel, and the connecting rope 15 on the reel is retracted and released thereupon, thereby pulling the fish collecting box 2 connected thereto to move up and down. The connecting rope 15 must possess enough strength and durability to ensure that it can not break in the whole process.

[0042] Example 3: Before use, the various structures are made first, and the movable parts, such as the gate, the movable fish partition door plate 8, the rotating shaft 6, etc., need to be tested in advance for their flexibility and the degree of fit between them.

[0043] Fix the buoyancy regulating water bag 1 on both sides of the fish guide fence 10 to ensure that the water inlet of the electric control valve 20 is unobstructed and no other foreign matter is blocking the electric control valve 20. Place the fish collecting box 2 in the fish collecting box retention housing 21 and check the connection stability of the hook 11 and the connecting rope 15.

[0044] Install the lifting motor 13 and connecting rope 15 to the fish elevator's fish transport system and perform a power-on test to ensure the equipment can smoothly enter operational mode. Secure the telescopic mechanism 19 to the guide ring 17 and test the maximum load capacity of the fish collection box. Check that the telescopic mechanism 19 extends and retracts normally, moves smoothly, and is free of any abnormal sounds or vibrations.

[0045] Once all preliminary work is completed, the fish elevator can be put into operation. During normal operation, water flows from the right side of the fish attracting system against the movable fish-isolating door panel 8, causing it to rotate unidirectionally around the rotating shaft 6. Fish downstream, attracted by the water flow, pass through the movable fish-isolating door panel 8 in an orderly, unidirectional manner and enter the temporary holding area. Two buoyancy-regulating water bladders 1 adjust the water volume within the buoyancy-regulating water bladders 1 via an electrically controlled valve 20, allowing fish from different water depths to enter the fish collection box smoothly. By monitoring the weight of the fish collection box 2, the annular connector assembly 12 aligns the fish collection box 2 with the fish collection box retention housing 21 of the fish transport system. The retractable mechanism 19 pulls the fish into the system and the lifting motor 13 lifts it, completing the fish transport operation. A fish inlet gate 3 is provided in the fish attracting system. After some target fish enter the temporary holding area, they can rest and then reenter the fish collection area. When non-target fish enter the temporary holding area, the control system controls the fish inlet gate 3 to open, guiding them out of the device area.

[0046] According to the real-time observation of fish distribution, the buoyancy adjustment water bag 1 is controlled to adjust the water depth where the target fish is located, and the one-way channel for fish and the fish collection box are coordinated. While improving the success rate of fish migration, it also reduces the risk of damage caused by traditional methods, and promotes the effective management of aquatic organisms and the maintenance of ecological balance.

Claims

1. A fish elevator device, characterized in that: The invention comprises a fish guide fence (10) and an annular connecting seat group (12), wherein the annular connecting seat group (12) comprises a movable ring (16) located below and a fixed ring (18) movably arranged above the movable ring (16), wherein the fixed ring (18) is provided with a plurality of guide rings (17) extending inward, wherein a guide column (14) is passed through the guide ring (17), wherein the upper end of the guide column (14) is provided with a panel, wherein a lifting motor (13) is provided on the panel, and a connecting rope (15) for pulling the fish collecting box (2) is provided on the lifting motor (13); A telescopic mechanism (19) is fixedly provided on the outside of the guide ring (17), the telescopic direction of the telescopic mechanism (19) is horizontal, and a magnetic suction cup (22) is provided at the end of the telescopic mechanism (19); A fish guide fence (10) is fixed on the outer wall of the movable ring (16), a fish collecting box retention shell (21) is provided at one end of the fish guide fence (10), and a fish inlet gate (3) is provided in the middle of the fish guide fence (10).

2. A fish lift device according to claim 1, characterized in that: The fish guide fence (10) is provided with buoyancy regulating water bags (1) on both sides, the buoyancy regulating water bags (1) are provided with hard water inlet pipes, and the water inlet pipes are provided with electric control valves (20).

3. A fish lift device according to claim 1, characterized in that: The fish guide fence (10) is provided with a convex wall (4) on one side of the inner end away from the fish collection box retention shell (21), and the side surface of the convex wall (4) facing the fish inlet gate (3) is an arc-shaped wall surface (5); A fish-isolating door plate is provided on one end of the fish-guide fence (10) away from the fish-collecting box retention shell (21), and the fish-isolating door plate includes a fixed fish-isolating door plate (7) fixedly connected to one side of the end of the fish-guide fence (10) and a movable fish-isolating door plate (8) provided on the rotating shaft (6); The movable fish-isolating door panel (8) and the fixed fish-isolating door panel (7) are both composed of a plurality of plate members distributed vertically, and the plate members constituting the movable fish-isolating door panel (8) and the fixed fish-isolating door panel (7) are staggered in the vertical direction.

4. A fish lift device according to claim 3, characterized in that: The movable fish-isolating door plate (8) rotates unidirectionally along with the rotating shaft (6) and fits against the arc-shaped wall surface (5).

5. The fish elevator device according to claim 3, characterized in that: The fish guide fence (10) is provided with a fish outlet gate (9) on a portion of the side wall between the fish inlet gate (3) and the fish separation gate plate.

6. The fish lift device according to claim 1, characterized in that: The top of the fish collecting box (2) is provided with a hook (11) that cooperates with the connecting rope (15) on the lifting motor (13).

7. The fish lift device according to claim 1, characterized in that: Two traction motors (23) are provided on a panel at the upper end of the guide column (14), and reset traction ropes (24) on the two traction motors (23) are connected to the corner points on both sides of the top surface of the fish inlet end of the fish guide grid (10).

8. The fish lift device according to claim 1, characterized in that: The fish collecting box (2) is provided with a one-way fish inlet (201) on the side facing the fish guide fence (10). The one-way fish inlet (201) is a variable diameter mechanism, and its cross-sectional diameter gradually decreases in the fish inlet direction.

9. A fish-passing operation method of a fish lift device according to any one of claims 1 to 8, characterized in that The following steps are involved: 1) lowering the fish collecting box (2) vertically to the level of the fish guide fence (10) by means of a lifting motor (13) and a connecting rope (15); 2) controlling the movement of the telescopic mechanism (19) and adsorbing the fish collecting box (2) by means of the magnetic chuck (22); 3) the telescopic mechanism (19) continues to move and pushes the fish collecting box (2) to move laterally until the fish collecting box (2) enters the fish collecting box retention housing (21); 4) driving the movable fish-isolating door plate (8) to rotate by controlling the rotating shaft (6) so that the target fish enters the fish guide fence (10); 5) Open the fish inlet gate (3) to allow the target fish to enter the fish collection box (2); 6) The telescopic mechanism (19) retracts to drive the fish collecting box (2) to separate from the fish collecting box retention housing (21) and move to the position directly below the lifting motor (13); 7) lifting the fish collecting box (2) to a position close to the panel where the lifting motor (13) is located by means of the lifting motor (13); 8) Manually unload the fish and complete the fish lifting operation.

10. The fish passing operation method of the fish elevator device according to claim 9, characterized in that: In the step 5), before opening the fish inlet gate (3), it is determined whether the fish in the fish guide fence (10) are target fish. If the fish are non-target fish, the fish outlet gate (9) is opened to allow the non-target fish to migrate to the outside. Before step 6), according to the direction of the fish guide fence (10) after self-adjustment with the water flow, the traction motor (23) is controlled to retract the rope and then adjust the fish guide fence (10) to reset to the initial state, and then the telescopic mechanism (19) is retracted.

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