Flexible fish lifting machine system

Abstract

The invention discloses a flexible fish lifting machine system, and belongs to the technical field of water conservancy and hydropower ecological protection. The system comprises a dam and a flexible fish lifting machine, the flexible fish lifting machine comprises a main body frame, a flexible fish collecting mechanism and a lifting traction mechanism, a bearing plate is arranged on the upper portion of the main body frame, the upper end of the flexible fish collecting mechanism is connected with the bottom of the bearing plate, and the lifting traction mechanism is arranged on the bearing plate. The connecting rod is connected with the lower end of the flexible fish collecting mechanism; the flexible fish collecting mechanism comprises a plurality of vertically-compressible flexible fish collecting boxes which are sequentially arranged from bottom to top, and every two vertically-compressible flexible fish collecting boxes which are adjacent to each other are communicated with each other. According to the flexible fish lifting machine system, lifting of fishes in a plurality of flexible fish collecting boxes capable of being vertically compressed can be completed by adopting one lifting traction mechanism, the operation process of the flexible fish lifting machine system is simplified, and the operation energy consumption of the flexible fish lifting machine system is remarkably reduced.

Description

Technical Field

[0001] This invention relates to a flexible fish lift system, belonging to the field of water conservancy and hydropower ecological protection technology. Background Technology

[0002] Fish lifts are one of the main types of fish passage facilities in water conservancy and hydropower projects. Their working principle is similar to that of a ship lift. Fish are first attracted into metal net cages or trough-type fish-collecting boxes using fish-attracting devices. Then, the fish-collecting boxes are lifted vertically or tilted to allow the fish to move upstream or downstream. Traditional fish lifts mainly consist of fish-collecting devices, lifting devices, and release devices. The fish-collecting devices attract fish through fish-guiding devices, fish-collecting channels, fish-collecting troughs, and fish-driving barriers. The lifting devices lift the attracted fish, and finally, the release devices release the fish upstream of the dam. Compared to the most widely used fishways, traditional fish lifts have a smaller footprint, higher mechanical transfer efficiency, and lower sensitivity to changes in upstream water levels. However, their disadvantages include high operating and maintenance costs, periodic operation making continuous fish passage difficult, and the use of rigid materials and connections in the structures, resulting in excessive weight and potential damage to the fish due to mechanical friction during operation.

[0003] Existing fish-lifting technology has made some progress in addressing the challenge of continuous fish passage. For example, Chinese patent document CN119877488B discloses a fish-passing system with both autonomous and assisted fish-passing functions. This system comprises a fishway assembly consisting of a first square tube and a second square tube. A fish-lifting mechanism is located within the first square tube to vertically lift fish into a temporary storage tray. The lifting mechanism includes a slide rail, multiple fish collection boxes, and multiple lead screws located inside the first square tube. The fish collection boxes slide on the slide rail, and each fish collection box is threaded onto a lead screw. Multiple drive motors are located at the top of the first square tube, and the output shaft of each drive motor is connected to the top of a lead screw. This fish-passing system, by setting up multiple fish collection boxes according to the habits of fish inhabiting different water layers, achieves continuous fish passage. However, each fish collection box requires a set of drive motors and lead screw-nut mechanisms for operation, making the process cumbersome and energy-intensive, indicating significant room for technological improvement. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a flexible fish lift system.

[0005] This invention is achieved through the following technical solution: A flexible fish lift system includes a dam and a flexible fish lift. A fish transport road is provided on one side slope of the dam. The flexible fish lift is located on the downstream side of the dam, and the fish outlet of the flexible fish lift is connected to the part of the fish transport road located downstream of the dam through a transition chute. The flexible fish lifter includes a main frame, a flexible fish collection mechanism, and a lifting and traction mechanism. The upper part of the main frame is provided with a support plate. The upper end of the flexible fish collection mechanism is connected to the bottom of the support plate. The lifting and traction mechanism is located on the support plate and is connected to the lower end of the flexible fish collection mechanism. The flexible fish collection mechanism includes multiple vertically compressible flexible fish collection boxes arranged sequentially from bottom to top, and two adjacent vertically compressible flexible fish collection boxes are interconnected.

[0006] The end of the transition chute furthest from the flexible fish lifter is located above the fish transport road and is connected to the fish transport road via a support frame.

[0007] All the vertically compressible flexible fish collection boxes in the flexible fish collection mechanism are arranged in two rows, and the vertically compressible flexible fish collection boxes in the two rows are arranged alternately up and down.

[0008] In two adjacent vertically compressible flexible fish collection boxes, the upper part of the next vertically compressible flexible fish collection box is connected and communicated with the lower part of the previous vertically compressible flexible fish collection box.

[0009] The vertically compressible flexible fish collection box includes a flexible membrane bladder, with a top plate at the upper end and a bottom plate at the lower end. The top plate with the highest elevation in the flexible fish collection mechanism is fixedly connected to the bottom of the supporting plate. On the bottom plate of the vertically compressible flexible fish collection box with the lowest elevation, a pusher is provided directly below the vertically compressible flexible fish collection box above it. The flexible fish-collecting mechanism has a fish outlet on the upper part of one side wall of the flexible membrane bladder with the lowest elevation, and fish inlets A on the lower part of one side wall of the other flexible membrane bladders, and fish outlets on the upper part of the other flexible membrane bladders.

[0010] The top surface of the bottom plate is an inclined surface, and the lower end of the inclined surface is arranged close to the side wall of the flexible membrane bladder where the membrane bladder inlet A or the membrane bladder outlet is opened. The main frame is provided with an intermediate chute for connecting the fish outlet of the membrane bladder with the highest elevation and the fish inlet of the transition chute.

[0011] The main frame has a slide rail on the front and back sides of the two vertically compressible flexible fish collection boxes. The top and bottom plates of each vertically compressible flexible fish collection box are slidably connected to the slide rails on its front and back sides by sliders.

[0012] The lifting and traction mechanism includes a winch and a traction rope. The winch is mounted on the bearing plate. One end of the traction rope is connected to the winch, the middle part is wound around the winch, and the other end is connected to the lowest elevation base plate.

[0013] Two fish-attracting mechanisms are arranged side by side on the main frame, and a flexible fish-collecting mechanism is located between the two fish-attracting mechanisms.

[0014] The fish-attracting mechanism includes a mounting frame and a water pump. The mounting frame is fixed on the main frame. Multiple electric cylinders and multiple hollow horn-shaped fish-attracting devices are spaced apart from bottom to top on the mounting frame. The multiple electric cylinders are located above the multiple hollow horn-shaped fish-attracting devices. The small end of the hollow horn-shaped fish-attracting device is arranged close to the flexible fish-collecting mechanism. The large end of the hollow horn-shaped fish-attracting device is arranged in a circumferential array with multiple nozzles, and the nozzles are connected to the interlayer of the hollow horn-shaped fish-attracting device. The water pump is connected to the interlayer of the hollow horn-shaped fish-attracting device through a pipe. An interception net is provided at the lower end of the electric cylinder. When the flexible fish-attracting mechanism is in a stretched state, a fish inlet B is provided on the flexible membrane bladder at a position aligned with the hollow trumpet-shaped fish-attracting element.

[0015] The beneficial effects of this invention are as follows: 1. A single lifting and traction mechanism can be used to lift fish from multiple vertically compressible flexible fish collection boxes, simplifying the operation of the flexible fish lift system and significantly reducing its energy consumption.

[0016] 2. Set the top surface of the base plate as an inclined surface, and arrange the lower end of the inclined surface close to the side wall of the flexible membrane bladder with the fish inlet A or fish outlet A. This facilitates the transfer of fish from the flexible membrane bladder to the next flexible membrane bladder during the compression of a certain flexible membrane bladder, thereby achieving the gradual lifting of fish.

[0017] 3. The top and bottom plates of each vertically compressible flexible fish collection box are slidably connected to the slide rails on its front and rear sides via sliders, which can improve the stability and reliability of the compression and expansion of the flexible membrane bladder; in addition, it can also prevent the vertically compressible flexible fish collection box from shaking significantly under the impact of water flow.

[0018] 4. A pioneering frame-type flexible fish lift system. This invention designs the fish lift as a flexible structure that can extend and retract vertically to achieve lifting and lowering. The flexible membrane is made of a highly elastic, tear-resistant, pollution-resistant, and acid / alkali-resistant flexible material, causing no rigid collision damage to fish and possessing strong applicability. This patented, pioneering frame-type flexible fish lift system confines fish within a layered flexible membrane for vertical transport and lifting. The smooth inner wall of the flexible membrane allows for flexible deformation and recovery, overturning the traditional rigid design concept of fish lifts and avoiding the adverse effects of physical friction and collision on fish caused by traditional fish lift systems. It provides a completely new reference, especially for the design concept of high-dam fish passage facilities.

[0019] 5. This invention pioneers a progressive squeezing and lifting fish-passing mode. It uses a winch to control the pulling of a traction rope, squeezing the flexible membrane upwards to transfer the fish school upwards, and then extending the flexible membrane downwards to return it to its initial state. Specifically, when attracting fish, an electric cylinder raises the intercepting net, allowing both fish and water to pass between the hollow, trumpet-shaped fish-attracting element and the fish inlet B of the flexible membrane. When squeezing the flexible membrane to lift the fish school, the electric cylinder lowers the intercepting net, allowing water to pass between the hollow, trumpet-shaped fish-attracting element and the fish inlet B of the flexible membrane, thus providing a reliable drainage channel for the squeezing process and achieving water pressure balance inside and outside the flexible membrane.

[0020] 6. Improved overall operational efficiency of the fish lift system. The flexible fish lift system of this invention improves fish passage efficiency and reduces operating costs, mainly in the following aspects: First, the flexible fish lift is designed as a two-row, multi-layered, vertically compressible flexible fish collection box arrangement structure. Hollow trumpet-shaped fish attractants are set at different layers of flexible membrane bladders to attract fish schools. Through a layered progressive lifting, secondary compression and transfer on the inclined bottom plate, and then progressive lifting again, only a single winch is needed to drive the entire fish lifting process, realizing the continuous passage of fish across the entire cross-section and multiple water layers, further improving operational efficiency compared to existing technologies; Second, the flexible fish lift is designed as... The design features a two-row, multi-layered, vertically compressible flexible fish collection box structure. When a particular layer of the vertically compressible flexible fish collection box requires maintenance, its inlet and outlet can be closed via a baffle or gate, enabling independent operation without affecting the normal operation of other layers above it. This avoids the drawback of a through-type flexible fish lifter where damage to one part or the need for temporary repair would affect the normal operation of the entire system. This design concept achieves continuous fish passage while further reducing the operation and maintenance costs of the flexible fish lifter system, and has significant potential for widespread application in the field of fish lifter technology. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the flexible fish lifter of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the flexible fish-attracting mechanism, intermediate chute, hollow trumpet-shaped fish-attracting component, nozzle, electric cylinder, interception net, and lifting and traction mechanism of the present invention. Figure 4 This is a schematic diagram of the structure of the flexible membrane capsule of the present invention; Figure 5 for Figure 3 A schematic diagram of the structure when all four flexible membrane sacs are in an extended state; Figure 6 for Figure 5 A schematic diagram of the structure of the lowermost flexible membrane capsule after compression; Figure 7 for Figure 5 A schematic diagram of the structure of the two flexible membrane sacs in the lower middle section after compression; Figure 8 for Figure 5 A schematic diagram of the structure after all four flexible membrane sacs are compressed.

[0022] In the diagram: 1-Dam, 2-Fish transfer road, 3-Transfer vehicle, 4-Transition chute, 5-Flexible fish lifter, 51-Main frame, 511-Bearing plate frame, 52-Flexible fish collection mechanism, 521-Bottom plate, 522-Push frame, 523-Flexible membrane bladder, 5231-Membrane bladder fish inlet B, 5232-Membrane bladder fish inlet A, 5233-Membrane bladder fish outlet, 524-Top plate, 525-Intermediate chute, 53-Slide rail, 54-Fish attracting mechanism, 541-Mounting frame, 542-Hollow trumpet-shaped fish attracting component, 543-Nozzle, 544-Electric cylinder, 545-Interception net, 55-Lifting and traction mechanism, 551-Wind, 552-Traction rope, 56-Slider. Detailed Implementation

[0023] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0024] like Figures 1 to 8 As shown, the flexible fish lift system of the present invention includes a dam 1 and a flexible fish lift 5. A fish transfer road 2 is provided on one side of the bank slope of the dam 1. The flexible fish lift 5 is located on the downstream side of the dam 1, and the fish outlet of the flexible fish lift 5 is connected to the part of the fish transfer road 2 located downstream of the dam 1 through a transition chute 4. The flexible fish lifter 5 includes a main frame 51, a flexible fish collection mechanism 52, and a lifting and traction mechanism 55. The upper part of the main frame 51 is provided with a support plate 511. The upper end of the flexible fish collection mechanism 52 is connected to the bottom of the support plate 511. The lifting and traction mechanism 55 is provided on the support plate 511 and is connected to the lower end of the flexible fish collection mechanism 52. The flexible fish collection mechanism 52 includes a plurality of vertically compressible flexible fish collection boxes arranged sequentially from bottom to top, and two adjacent vertically compressible flexible fish collection boxes are interconnected.

[0025] Specifically, fish are collected through multiple vertically compressible flexible fish collection boxes in the flexible fish collection mechanism 52. The lifting and traction mechanism 55 drives the vertically compressible flexible fish collection boxes in the flexible fish collection mechanism 52 to compress and lift the fish. Then, the lifted fish are guided through the transition chute 4 into a transfer vehicle 3 parked on the fish transfer road 2. Finally, the transfer vehicle 3 transports and releases the fish into the upstream river channel of the dam 1, thus achieving fish crossing the dam. Using only one lifting and traction mechanism 55 can complete the lifting of fish from multiple vertically compressible flexible fish collection boxes, simplifying the operation of the flexible fish lift system and significantly reducing its energy consumption.

[0026] The end of the transition chute 4 furthest from the flexible fish lifter 5 is located above the fish transfer road 2 and is connected to the fish transfer road 2 via a support frame. This facilitates the transfer chute 4 guiding the fish into the cargo box of the transfer vehicle 3.

[0027] All the vertically compressible flexible fish collection boxes in the flexible fish collection mechanism 52 are arranged in two rows, with the vertically compressible flexible fish collection boxes in the two rows alternating vertically. This allows for the maximum number of vertically compressible flexible fish collection boxes within the same height range, thereby improving the fish lifting efficiency of the flexible fish lifter system.

[0028] In two adjacent vertically compressible flexible fish collection boxes, the upper part of the next vertically compressible flexible fish collection box is connected and communicated with the lower part of the previous vertically compressible flexible fish collection box.

[0029] The vertically compressible flexible fish collection box includes a flexible membrane 523, with a top plate 524 at the upper end and a bottom plate 521 at the lower end. The top plate 524, which has the highest elevation in the flexible fish collection mechanism 52, is fixedly connected to the bottom of the bearing plate 511. On the bottom plate 521 of the vertically compressible flexible fish collection box, which has the lowest elevation, a pusher 522 is provided directly below the vertically compressible flexible fish collection box above it. The flexible fish-collecting mechanism 52 has a fish outlet 5233 on the upper part of one side wall of the flexible membrane 523 with the lowest elevation. The other flexible membrane 523s have fish inlets A5232 on the lower part of one side wall and fish outlets 5233 on the upper part.

[0030] The top surface of the bottom plate 521 is an inclined surface, and the lower end of the inclined surface is arranged close to the side wall of the flexible membrane 523, which has a membrane inlet A5232 or a membrane outlet 5233. The main frame 51 is provided with an intermediate chute 525 for connecting the fish outlet 5233 of the highest-elevation membrane bladder and the fish inlet of the transition chute 4. The top surface of the base plate 521 is set as an inclined surface, and the lower end of the inclined surface is arranged close to the side wall of the flexible membrane bladder 523 with the fish inlet A5232 or the fish outlet 5233. This facilitates the transfer of fish from the flexible membrane bladder 523 to the next flexible membrane bladder 523 during the compression of a certain flexible membrane bladder 523, thereby achieving the gradual lifting of fish.

[0031] Specifically, the base plate 521 includes a base plate body and a sponge body. The base plate body is a rigid flat plate, and the sponge body is placed on the base plate body. The cross-sectional shape of the sponge body is a right-angled triangle, and the top surface of the sponge body is an inclined surface.

[0032] The main frame 51 has a slide rail 53 on the front and rear sides of the two rows of vertically compressible flexible fish collection boxes. The top plate 524 and bottom plate 521 of each vertically compressible flexible fish collection box are slidably connected to the slide rails 53 on their front and rear sides via sliders 56. The slidable connection of the top plate 524 and bottom plate 521 of each vertically compressible flexible fish collection box to the slide rails 53 on their front and rear sides via sliders 56 can improve the stability and reliability of the compression and expansion of the flexible membrane bladder 523; in addition, it can also prevent the vertically compressible flexible fish collection box from shaking significantly under the impact of water flow.

[0033] The lifting and traction mechanism 55 includes a winch 551 and a traction rope 552. The winch 551 is mounted on the bearing plate 511. One end of the traction rope 552 is connected to the winch 551, the middle part is wound around the winch 551, and the other end is connected to the bottom plate 521 with the lowest elevation.

[0034] Two fish-attracting mechanisms 54 are arranged side by side on the main frame 51, and a flexible fish-collecting mechanism 52 is located between the two fish-attracting mechanisms 54.

[0035] The fish-attracting mechanism 54 includes a mounting frame 541 and a water pump. The mounting frame 541 is fixedly mounted on the main frame 51. Multiple electric cylinders 544 and multiple hollow horn-shaped fish-attracting elements 542 are spaced apart from bottom to top on the mounting frame 541. The multiple electric cylinders 544 are located above the multiple hollow horn-shaped fish-attracting elements 542 in a one-to-one correspondence. The small end of the hollow horn-shaped fish-attracting element 542 is arranged close to the flexible fish-collecting mechanism 52. The large end of the hollow horn-shaped fish-attracting element 542 is provided with multiple nozzles 543 in a circumferential array, and the nozzles 543 are connected to the interlayer of the hollow horn-shaped fish-attracting element 542. The water pump is connected to the interlayer of the hollow horn-shaped fish-attracting element 542 through a pipe. The lower end of the electric cylinder 544 is provided with an interception net 545. When the flexible fish-attracting mechanism 52 is in a stretched state, the flexible membrane 523 has a fish inlet B5231 at a position aligned with the hollow trumpet-shaped fish-attracting element 542.

[0036] The flexible fish lift system described in this invention has the following working principle or operation process: like Figure 5 As shown, in the initial state, all the flexible membrane bladders 523 are in an extended state. At this time, the fish inlet B5231 on the flexible membrane bladder 523 is aligned with the small end port of the hollow trumpet-shaped fish attractor 542. All the electric cylinders 544 pull the intercepting net 545 upward until the intercepting net 545 and the small end port of the hollow trumpet-shaped fish attractor 542 are completely misaligned. That is, both fish and water pass between the hollow trumpet-shaped fish attractor 542 and the fish inlet B5231 of the flexible membrane bladder 523.

[0037] The water pump is started, and water is pumped through pipes to the interlayer of each hollow funnel-shaped fish attractor 542. The water in the interlayer is then sprayed out through multiple nozzles 543 at the large end of the hollow funnel-shaped fish attractor 542, thus forming a fish-attracting water flow to attract fish into the hollow funnel-shaped fish attractor 542. The fish that enter the hollow funnel-shaped fish attractor 542 enter each flexible membrane sac 523 through the fish inlet B5231, thereby achieving fish attraction at multiple water layers.

[0038] After a period of time, all electric cylinders 544 activate, pushing the intercepting net 545 downwards, so that only water passes between the small end of the hollow trumpet-shaped fish attractant 542 and the fish inlet B5231 of the flexible membrane bladder 523, but no fish. Then, the winch 551 rotates forward, pulling the lowest elevation base plate 521 upwards along the slide rail 53 via the traction rope 552. Under the push of the base plate 521, the lowest flexible membrane bladder 523 begins to compress, and the fish inside the lowest flexible membrane bladder 523, guided by the inclined surface of the top of the lower base plate 521, enter the upper flexible membrane bladder 523, such as... Figure 6 As shown.

[0039] When the lowest flexible membrane sac 523 is fully compressed, the pusher 522 pushes the bottom plate 521 of the second-to-last vertically compressible flexible fish collection box upwards along the slide rail 53, thereby compressing the second-to-last flexible membrane sac 523 and forcing the fish inside into the third-to-last flexible membrane sac 523. Figure 7 As shown.

[0040] Similarly, the two rows of flexible membrane sacs 523 on the right and left are compressed one by one from bottom to top, and the fish are gradually transferred from the lower flexible membrane sac 523 to the upper flexible membrane sac 523. Then, during the compression of the uppermost flexible membrane sac 523, the fish inside slide down through the middle slide 525 and the transition slide 4 and fall into the transfer vehicle 3 parked on the fish transfer road 2. Finally, the fish are transported and released into the river channel upstream of the dam 1 by the transfer vehicle 3.

[0041] Next, the winch 551 reverses to release the traction rope 552. Under the gravity of all the bottom plates 521 and all the top plates 524, each flexible membrane 523 gradually unfolds downwards. Then, all the electric cylinders 544 pull the interception net 545 upwards until the interception net 545 is completely misaligned with the small end of the hollow trumpet-shaped fish attractant 542. At this point, it returns to the initial state, completing one work cycle.

Claims

1. A flexible fish lift system, characterized in that: Includes a dam (1) and a flexible fish lifter (5). A fish transport road (2) is provided on one side of the bank slope of the dam (1). The flexible fish lifter (5) is located on the downstream side of the dam (1), and the fish outlet of the flexible fish lifter (5) is connected to the part of the fish transport road (2) located downstream of the dam (1) through a transition chute (4). The flexible fish lifter (5) includes a main frame (51), a flexible fish collection mechanism (52), and a lifting and traction mechanism (55). The upper part of the main frame (51) is provided with a support plate (511). The upper end of the flexible fish collection mechanism (52) is connected to the bottom of the support plate (511). The lifting and traction mechanism (55) is located on the support plate (511) and is connected to the lower end of the flexible fish collection mechanism (52). The flexible fish collection mechanism (52) includes multiple vertically compressible flexible fish collection boxes arranged sequentially from bottom to top, and two adjacent vertically compressible flexible fish collection boxes are interconnected.

2. The flexible fish lift system as described in claim 1, characterized in that: The end of the transition chute (4) away from the flexible fish lifter (5) is located above the fish transport road (2) and is connected to the fish transport road (2) through a support frame.

3. The flexible fish lift system as described in claim 1, characterized in that: All the vertically compressible flexible fish collection boxes in the flexible fish collection mechanism (52) are arranged in two rows, and the vertically compressible flexible fish collection boxes in the two rows are arranged alternately up and down.

4. The flexible fish lift system as described in claim 3, characterized in that: In two adjacent vertically compressible flexible fish collection boxes, the upper part of the next vertically compressible flexible fish collection box is connected and communicated with the lower part of the previous vertically compressible flexible fish collection box.

5. The flexible fish lift system as described in claim 3 or 4, characterized in that: The vertically compressible flexible fish collection box includes a flexible membrane bladder (523), with a top plate (524) at the upper end and a bottom plate (521) at the lower end. The top plate (524) with the highest elevation in the flexible fish collection mechanism (52) is fixedly connected to the bottom of the bearing plate (511). On the bottom plate (521) of the vertically compressible flexible fish collection box with the lowest elevation, a pusher (522) is provided directly below the vertically compressible flexible fish collection box above it. The flexible fish-collecting mechanism (52) has a fish outlet (5233) on the upper part of one side wall of the flexible membrane bladder (523) with the lowest elevation. The other flexible membrane bladders (523) have fish inlets (5232) on the lower part of one side wall and fish outlets (5233) on the upper part.

6. The flexible fish lift system as described in claim 5, characterized in that: The top surface of the bottom plate (521) is an inclined surface, and the lower end of the inclined surface is arranged close to the side wall of the flexible membrane (523) which has a membrane inlet A (5232) or a membrane outlet (5233). The main frame (51) is provided with an intermediate chute (525) for connecting the fish outlet (5233) of the membrane bladder with the highest elevation and the fish inlet of the transition chute (4).

7. The flexible fish lift system as described in claim 5, characterized in that: On the main frame (51), a slide rail (53) is provided on the front and rear sides of the two vertically compressible flexible fish collection boxes. The top plate (524) and bottom plate (521) of each vertically compressible flexible fish collection box are slidably connected to the slide rail (53) on its front and rear sides by a slider (56).

8. The flexible fish lift system as described in claim 5, characterized in that: The lifting and traction mechanism (55) includes a winch (551) and a traction rope (552). The winch (551) is mounted on the bearing plate (511). One end of the traction rope (552) is connected to the winch (551), the middle part is wound around the winch (551), and the other end is connected to the bottom plate (521) with the lowest elevation.

9. The flexible fish lift system as described in claim 1, characterized in that: Two fish-attracting mechanisms (54) are arranged side by side on the main frame (51), and a flexible fish-collecting mechanism (52) is located between the two fish-attracting mechanisms (54).

10. The flexible fish lift system as described in claim 1, characterized in that: The fish-attracting mechanism (54) includes a mounting frame (541) and a water pump. The mounting frame (541) is fixed on the main frame (51). Multiple electric cylinders (544) and multiple hollow horn-shaped fish-attracting components (542) are spaced apart from bottom to top on the mounting frame (541). The multiple electric cylinders (544) are located above the multiple hollow horn-shaped fish-attracting components (542) in a one-to-one correspondence. The small end of the hollow horn-shaped fish-attracting component (542) is arranged close to the flexible fish-collecting mechanism (52). The large end of the hollow horn-shaped fish-attracting component (542) is provided with multiple nozzles (543) in a circumferential array. The nozzles (543) are connected to the interlayer of the hollow horn-shaped fish-attracting component (542). The water pump is connected to the interlayer of the hollow horn-shaped fish-attracting component (542) through a pipe. The lower end of the electric cylinder (544) is provided with an intercepting net (545). When the flexible fish-attracting mechanism (52) is in a stretched state, a fish inlet B (5231) is provided on the flexible membrane bladder (523) at a position aligned with the hollow trumpet-shaped fish-attracting component (542).

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