A lifting mechanism-based fish gathering device and method

Abstract

The application belongs to the technical field of water conservancy projects, and discloses a fish collecting device based on a lifting mechanism and a fish collecting method, wherein the fish collecting device based on the lifting mechanism comprises a fish collecting box body, a pair of tapered entrances are symmetrically arranged at the center of the two sides of the fish collecting box body, a pair of mounting plates are fixedly connected to the top edges of the fish collecting box body, and a protective shell is fixedly connected to the middle part of the fish collecting box body. Through cooperation of structures such as the arc-shaped bevel pipe, the inner bushing and the flexible spiral pad, a laminar flow type circular flow is generated in the fish collecting box body by the water pump, which is similar to a small vortex. The vortex drives the surrounding water to flow to the tapered entrance for fish entering, and forms a significant fish-attracting water flow. For fish species that like water flow, the water flow is used to drive fish into the fish collecting box body by using the rheotaxis of fish. The system can adjust the water pump power according to the body type, species and hydrological conditions of the target fish on the same day, so as to control the flow rate of the fish-attracting water flow and achieve the best effect.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering technology, specifically a fish collection device and fish collection method based on a lifting mechanism. Background Technology

[0002] Fish collection devices with lifting mechanisms are usually installed in dam systems with large height differences. Because of the significant difference in liquid level in such dams, it is costly to install only a weir-type fishway, and it cannot guarantee that most migratory fish can enter the fishway from the lower level. Therefore, fish collection devices are usually used to lift and transport the fish, helping them to reach the upper reaches smoothly, thereby ensuring the normal operation of the dam and the health of the ecological environment.

[0003] The prior art document application number CN117888513B discloses a fish-collecting device and method based on a fish lift system. The device includes a buoyancy fish tank with a density less than that of the water in the vertical shaft. The buoyancy fish tank includes a fish-guiding component with a lower port diameter smaller than its upper port diameter, and a mounting hole formed at the lower end of the fish-guiding component. A fish-collecting hopper is placed inside the mounting hole, and an outwardly extending hanging ear is provided on the upper part of the hopper. The hanging ear can overlap the mounting hole, and the weight of the hopper can cause the buoyancy fish tank to sink. The fish lift system also includes a lifting device connected to the fish-collecting hopper for lifting and transferring the hopper. By using a split-type fish-collecting device, the working space required for transferring the hopper can be reduced, as can the requirements for the lifting device. Furthermore, it minimizes disturbance to the fish, effectively preventing them from darting around in the vertical shaft and causing injury, and helps the fish maintain their current pre-breeding state.

[0004] Although the above-mentioned device reduces the disturbance to fish entering the fish collection box through its split design, if the fish crowd and move around inside the box during the lifting process, it can easily lead to abrasions and collisions. It can also cause violent water flow, which changes the hydrostatic pressure on the fish. Since the buoyancy adjustment of the fish swim bladder is relatively slow, it can easily lead to acute injuries and affect the survival rate of the fish. Summary of the Invention

[0005] To address the problem mentioned in the background art that during the lifting process of a fish collection box, if the fish crowd and move around inside the box, it is not only easy to cause abrasions and collisions, but also to cause violent shaking of the water flow, which changes the hydrostatic pressure on the fish and leads to acute damage to the swim bladder, the present invention provides a fish collection device and fish collection method based on a lifting mechanism.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fish collecting device based on a lifting mechanism, comprising a fish collecting box, a pair of conical inlets symmetrically arranged at the center of both sides of the fish collecting box, a pair of mounting plates fixedly connected to the top edge of the fish collecting box, a protective shell fixedly connected to the middle of the fish collecting box, and a plurality of drainage outlets equidistantly opened at the bottom edge of the fish collecting box; further comprising: a vortex-type fish guiding mechanism connected to the fish collecting box; and a fish driving and releasing mechanism connected to the vortex-type fish guiding mechanism;

[0007] The vortex-type fish-attracting mechanism includes an inner liner fixed to the inner cavity of the fish-collecting box, and a flexible spiral pad is fixed to the inner cavity of the inner liner.

[0008] The fish-driving and releasing mechanism includes a rotating plate that slides against the inner surface of the top of the fish collection box, and a silicone rod is rotatably connected to the rotating plate.

[0009] Preferably, the vortex-type fish-attracting mechanism further includes a water inlet pipe that rotates through the top of the fish collection tank. The water inlet pipe is fixedly connected to a return water pipe via a water pump. One end of the return water pipe is fixedly inserted through the protective shell, and the other end of the return water pipe extends to the lower side of the fish collection tank and is fixedly inserted through the inner liner.

[0010] Preferably, the inner liner has round holes on both sides, and rubber rings are fixed to the inner side of each round hole. The round holes are connected to the conical inlet.

[0011] Preferably, the end of the water inlet pipe is fixedly connected to an arc-shaped oblique pipe, which faces the inner surface of the inner liner at an oblique angle.

[0012] Preferably, the fish-driving and releasing mechanism further includes a drive motor fixed to the inner cavity of the protective shell. The output end of the drive motor is connected to a first gear, and the outer wall of the first gear meshes with a second gear. The second gear is sleeved on the outer wall of the water inlet pipe through a rotating ring, and the rotating ring rotates through the fish collection box and is fixed to the rotating plate.

[0013] Preferably, the water inlet pipe is fixedly inserted through the center of the rotating plate, a crescent groove is provided on the inner surface of the top of the fish collecting box, and a rack is fixedly connected to the inner side of the crescent groove. A third gear is fixedly connected to the top of the silicone rod, and the third gear meshes with the rack.

[0014] Preferably, the sidewall of the silicone rod is rotatably connected with a plurality of blades at equal intervals, and the blades are inclined on the silicone rod.

[0015] Preferably, a pair of arc-shaped plates are slidably connected to both sides of the bottom of the rotating plate, and a pair of sliding push blocks are fixedly connected to the inner side of each arc-shaped plate. Two pairs of sliding groove boxes are fixedly connected to the bottom of the rotating plate, and the sliding push blocks and sliding groove boxes are elastically connected to each other.

[0016] Preferably, a pair of arc-shaped plates are rotatably connected at equal intervals along their bottom edges, with the outer walls of the balls abutting against the inner cavity of the fish collection box. A sealing plug is fixed to the outer side of each arc-shaped plate, and the sealing plug matches the conical inlet.

[0017] This application also proposes a fish-collecting device and method based on a lifting mechanism, wherein the fish-collecting method is as follows:

[0018] S1. Fish attraction stage: By setting up water pumps underwater or using tailwater flow, a fish attraction flow is formed at the fish collection point of the dam to simulate natural water flow and attract fish that like to swim upstream. In order to improve the attraction effect on different fish species, fish attraction lights with specific spectra, acoustic fish attraction devices that simulate feeding sounds or gathering sounds, or chemical attractants for certain fish species will also be used.

[0019] S2, Fish Collection Stage: After the fish are induced to the fish collection area, they need to be collected into the lifting equipment. The fish in the fish collection area gather in the fishway outlet pool, enter the fish collection box from the cone-shaped inlet, and then enter the inner liner. During this process, the fish are counted and the species are identified by the underwater camera.

[0020] S3, Lifting and Transfer Stage: After the fish collection box is filled with fish, a winch is used to vertically lift the fish collection box to the release area on the top of the dam. During the lifting process, excess water overflows from the top of the inner liner and is discharged through the bottom drain to maintain the hydrostatic pressure of the fish collection box.

[0021] S4. Release Stage: The fish are transferred to the release point on the dam and smoothly enter the upstream reservoir through the release pool. The release point is selected in an area with gentle water flow, suitable for fish survival and shelter from predators. During the opening of the fish collection box, the auxiliary fish in the box are driven outward by silicone rods using a fish-driving release mechanism.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This invention, through the combination of an arc-shaped oblique pipe, an inner liner, and a flexible spiral pad, creates a laminar flow circulation, similar to a small vortex, inside the fish collection tank using a water pump. This vortex draws surrounding water towards the conical inlet for fish entry, forming a significant fish-attracting current. For fish species that prefer flowing water, this system utilizes their tendency to follow currents to lure them into the collection tank. The system can adjust the pump power based on the target fish's size, species, and the day's hydrological conditions, thereby controlling the flow rate of the attracting current to achieve optimal results. Simultaneously, as the fish enter... After the fish collection tank is installed, the continuous circulation helps to retain the fish, gradually causing them to rotate and circulate in an orderly manner, which facilitates stable transportation. For fish species that prefer still water, sonar of a specific frequency or appropriate light is used for guidance, thus adapting to the capture of different fish species. A spiral flexible liner is also installed to assist in the formation of circulation while preventing fish from hitting the tank walls and getting injured when entering a new environment, effectively improving the survival rate of the fish. During the lifting process, excess water overflows from the top of the inner liner and is discharged through the bottom drain, which can effectively maintain the hydrostatic pressure of the fish collection tank to prevent acute damage to the swim bladder.

[0024] This invention, through the coordinated arrangement of structures such as a silicone rod, a rotating plate, and blades, allows the fish collection box to open upon reaching the release point. During the opening process, the silicone rod rotates in an acute angle with the blade. The rotation of the silicone rod utilizes the water flow to compress the inner surface of the blade, generating an upward thrust that causes the blade to rotate and open outward, continuously driving the fish from the center and increasing the release rate to prevent fish from becoming trapped inside the inner liner.

[0025] This invention utilizes a combination of structures such as arc-shaped plates, sealing plugs, and rubber rings. When the fish collection box is full of fish and closed, a rotating plate causes the arc-shaped plates on both sides below to slide. The arc-shaped plates abut against the inner cavity of the fish collection box via ball bearings, reducing frictional resistance and maintaining device stability, thus improving durability. Furthermore, when the fish collection box rises, the instantaneous water pressure forces the sealing plugs on both sides into the conical inlet for sealing, and the arc-shaped plates coincide with the circular hole, which is then sealed by the rubber ring, effectively preventing water leakage during transport. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a side view of the three-dimensional structure of the present invention;

[0028] Figure 3 This is a schematic diagram showing the structural fit between the protective shell and the return water pipe of the present invention;

[0029] Figure 4 This is a schematic diagram showing the structural fit between the fish collection box and the rotating plate of the present invention;

[0030] Figure 5 For the present invention Figure 4 A magnified view of the structure at point A in the middle;

[0031] Figure 6 This is a schematic diagram showing the structural fit between the arc-shaped beveled pipe and the water inlet pipe of the present invention;

[0032] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point B in the middle;

[0033] Figure 8 This is a schematic diagram showing the structural fit between the blade and the silicone rod of the present invention;

[0034] Figure 9 This is a schematic diagram showing the structural fit between the rotating plate and the silicone rod of the present invention;

[0035] Figure 10 This is a schematic diagram showing the structural fit between the flexible spiral pad and the inner liner of the present invention;

[0036] Figure 11 This is a schematic diagram of the fish collection box in the open state of the present invention;

[0037] Figure 12 For the present invention Figure 11 A magnified schematic diagram of the structure at point C in the middle;

[0038] Figure 13 This is a schematic diagram of the fish collection box in the closed state of the present invention;

[0039] Figure 14 This is a schematic diagram showing the structural fit between the sealing plug and the arc-shaped plate of the present invention.

[0040] In the picture:

[0041] 1. Fish collecting box; 2. Conical inlet; 3. Mounting plate; 4. Protective shell; 5. Vortex-type fish-attracting mechanism; 501. Water pump; 502. Return water pipe; 503. Inner liner; 504. Flexible spiral gasket; 505. Round hole; 506. Inlet pipe; 507. Arc-shaped oblique pipe; 508. Rubber ring; 6. Fish-driving and releasing mechanism; 601. Drive motor; 602. First gear; 603. Second gear; 604. Blade; 605. Sealing plug; 606. Rotating plate; 607. Third gear; 608. Silicone rod; 609. Slide box; 6010. Sliding push block; 6011. Arc plate; 6012. Ball bearing; 6013. Crescent groove; 6014. Rack; 7. Drain outlet. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] like Figures 1 to 14 As shown, the present invention provides a fish collecting device based on a lifting mechanism, including a fish collecting box 1, a pair of conical inlets 2 symmetrically arranged on both sides of the fish collecting box 1, a pair of mounting plates 3 fixedly connected to the top edge of the fish collecting box 1, a protective shell 4 fixedly connected to the middle of the fish collecting box 1, and a plurality of drainage outlets 7 equidistantly opened on the bottom edge of the fish collecting box 1. It also includes: a vortex-type fish guiding mechanism 5, which is connected to the fish collecting box 1; and a fish driving and releasing mechanism 6, which is connected to the vortex-type fish guiding mechanism 5.

[0044] Among them, the vortex-type fish-attracting mechanism 5 includes an inner liner 503 fixed to the inner cavity of the fish collection box 1, and a flexible spiral pad 504 fixed to the inner cavity of the inner liner 503; the fish-driving and releasing mechanism 6 includes a rotating plate 606 that slides against the inner surface of the top of the fish collection box 1, and a silicone rod 608 is rotatably connected to the rotating plate 606.

[0045] By adopting the above solution, excess water in the fish collection box 1 overflows from the top of the inner liner 503 during the lifting process and is discharged through the bottom drain 7, which can effectively maintain the hydrostatic pressure of the fish collection box 1 to prevent acute damage to the swim bladder.

[0046] like Figure 2 , Figure 4 and Figure 10 As shown, the vortex-type fish-attracting mechanism 5 also includes a water inlet pipe 506 that rotates through the top of the fish collection box 1. The water inlet pipe 506 is fixedly connected to a return water pipe 502 via a water pump 501. One end of the return water pipe 502 is fixedly connected to the protective shell 4, and the other end of the return water pipe 502 extends to the lower side of the fish collection box 1 and is fixedly connected to the inside of the inner liner 503. Both sides of the inner liner 503 are provided with round holes 505, and rubber rings 508 are fixedly connected to the inside of the round holes 505. The round holes 505 are connected to the conical inlet 2. The end of the water inlet pipe 506 is fixedly connected to an arc-shaped inclined pipe 507, which faces the inner surface of the inner liner 503 at an oblique angle.

[0047] The above scheme involves continuously pumping water from the bottom of the inner liner 503 into the fish collection tank 1 via the return water pipe 502, then into the fish collection tank 1 via the inlet pipe 506, and finally discharging it into the top area of ​​the inner cavity of the fish collection tank 1 via the arc-shaped inclined pipe 507. Because the arc-shaped inclined pipe 507 is angled towards the inner surface of the inner liner 503, the water flows rapidly along the surface of the inner liner 503 at an angle after discharge. Under the spiral guidance of the flexible spiral pad 504, the water inside the inner liner 503 continuously rotates and moves downwards until it is pumped out again through the return water pipe 502 at the bottom. This cycle repeats, creating a laminar flow circulation, similar to a small vortex.

[0048] like Figure 2 , Figures 4 to 12 As shown, the fish-driving and releasing mechanism 6 also includes a drive motor 601 fixed to the inner cavity of the protective shell 4. The output end of the drive motor 601 is connected to a first gear 602. The outer wall of the first gear 602 meshes with a second gear 603. The second gear 603 is sleeved on the outer wall of the water inlet pipe 506 through a rotating ring. The rotating ring rotates through the fish collection box 1 and is fixed to the rotating plate 606. The water inlet pipe 506 is fixedly inserted through the center of the rotating plate 606. A crescent groove 6013 is opened on the inner surface of the top of the fish collection box 1. A rack 6014 is fixed to the inner side of the crescent groove 6013. A third gear 607 is fixed to the top of the silicone rod 608. The third gear 607 meshes with the rack 6014. Several blades 604 are rotatably connected at equal intervals to the side wall of the silicone rod 608. The blades 604 are inclined on the silicone rod 608.

[0049] like Figures 11 to 14 As shown, a pair of arc-shaped plates 6011 are slidably connected to both sides of the bottom of the rotating plate 606. A pair of sliding push blocks 6010 are fixed to the inner side of each arc-shaped plate 6011. Two pairs of sliding groove boxes 609 are fixed to the bottom of the rotating plate 606. The sliding push blocks 6010 and the sliding groove boxes 609 are elastically connected to each other. Roller balls 6012 are equidistantly rotatably connected to the bottom edges of the pair of arc-shaped plates 6011. The outer walls of the roller balls 6012 abut against the inner cavity of the fish collection box 1. Sealing plugs 605 are fixed to the outer side of each arc-shaped plate 6011, and the sealing plugs 605 fit into the conical inlet 2.

[0050] Using the above scheme: After the fish collection box 1 is full of fish, the rotating plate 606 drives the arc-shaped plates 6011 on both sides below to slide. The arc-shaped plates 6011 abut against the inner cavity of the fish collection box 1 through the ball bearings 6012, reducing frictional resistance and maintaining the stability of the device. Then, the sealing plugs 605 on the arc-shaped plates 6011 are moved to the conical inlet 2 to block them. Next, the fish collection box 1 is lifted by a winch. Under the action of instantaneous water pressure, the sealing plugs 605 on both sides are squeezed into the conical inlet 2 to seal it. The arc-shaped plates 6011 coincide with the round hole 505, and the round hole 505 is sealed by the rubber ring 508 to prevent water leakage during transportation.

[0051] This application also proposes a fish-collecting device and method based on a lifting mechanism, the fish-collecting method being as follows:

[0052] S1. Fish attraction stage: By setting up water pumps underwater or using tailwater flow, a fish attraction flow is formed at the fish collection point of the dam to simulate natural water flow and attract fish that like to swim upstream. In order to improve the attraction effect on different fish species, fish attraction lights with specific spectra, acoustic fish attraction devices that simulate feeding sounds or gathering sounds, or chemical attractants for certain fish species will also be used.

[0053] S2, Fish Collection Stage: After the fish are induced to the fish collection area, they need to be collected into the lifting equipment. The fish in the fish collection area gather in the fishway outlet pool, enter the fish collection box 1 from the cone inlet 2, and then enter the inner liner 503. During this period, the fish are counted and the species are identified by the underwater camera.

[0054] S3, Lifting and Transfer Stage: After the fish collection box 1 is filled with fish, the fish collection box 1 is vertically lifted to the release area on the top of the dam using a winch. During the lifting process, excess water overflows from the top of the inner liner 503 and is discharged through the bottom drain 7 to maintain the hydrostatic pressure of the fish collection box 1.

[0055] S4. Release stage: The fish are transferred to the release point on the dam and smoothly enter the upstream reservoir through the release pool. The release point is selected in an area with gentle water flow, suitable for fish survival and avoiding predators. The fish-driving release mechanism 6 is used to drive the auxiliary fish in the box outwards during the opening of the fish collection box 1 by the silicone rod 608.

[0056] Working principle and usage process of this invention:

[0057] During the fish collection process, after the fish are lured to the collection area, the device is lowered to a suitable depth in the water. The fish collection box 1 is as follows: Figure 11The device is in the open state shown, at which point the water quickly submerges the entire device. When the water pump 501 is started, since the mop of the return pipe 502 is located below the inner liner 503, water from the bottom of the inner liner 503 can be continuously pumped through the return pipe 502 into the upper part of the fish collection tank 1, and then enters the fish collection tank 1 through the inlet pipe 506. Finally, it is discharged into the top area of ​​the inner cavity of the fish collection tank 1 through the arc-shaped inclined pipe 507. Because the curved oblique pipe 507 faces the inner surface of the inner liner 503 at an oblique angle, the water, after being discharged, can flow rapidly along the surface of the inner liner 503 at an oblique angle. Under the spiral guidance of the flexible spiral pad 504, the water inside the inner liner 503 continuously rotates and moves downward until it is pumped out again through the return water pipe 502 at the bottom. This cycle repeats, creating a laminar circulation, similar to a small vortex, which induces fish to enter the fish collection box 1. In addition, the system can adjust the pump power according to the size and species of the target fish and the hydrological conditions of the day, and control the pumping rate of the pump 501 in real time to control the flow rate of the vortex. The vortex will drive the water around the fish collection box 1 to flow towards the conical inlet 2, forming a significant fish-attracting water flow, prompting fish to quickly enter the fish collection box 1 from the conical inlet 2, and then enter the inner liner 503. Furthermore, the conical inlet 2 is equipped with an auxiliary fish-attracting device that can emit sonar at specific frequencies or appropriate light to attract different types of fish. When fish first enter the inner liner 503, the confined space may cause them to panic briefly. The flexible spiral pad 504 effectively prevents fish from hitting the tank walls and injuring themselves. Simultaneously, under the influence of the vortex, the fish gradually rotate and circulate orderly along the water flow, facilitating stable transport in the next step. During the lifting process, excess water overflows from the top of the inner liner 503 and is discharged through the bottom drain 7, effectively maintaining the hydrostatic pressure of the fish collection tank 1 to prevent damage to the swim bladders.

[0058] Once the inner liner 503 has held a sufficient number of fish, the drive motor 601 is activated, causing the first gear 602 to rotate. The first gear 602 then drives the second gear 603 to rotate synchronously, which in turn drives the rotating plate 606 to rotate synchronously. The rotating plate 606 causes the arc-shaped plates 6011 on both sides below to slide. The arc-shaped plates 6011, through ball bearings 6012, abut against the inner cavity of the fish collection box 1, reducing frictional resistance and maintaining device stability. Next, the sealing plugs 605 on the arc-shaped plates 6011 are moved to the conical inlet 2 to block them. Then, the fish collection box 1 is lifted using a winch. Under the instantaneous water pressure, the sealing plugs 605 on both sides are forced into the conical inlet 2 to seal it, and the arc-shaped plates 6011 coincide with the round hole 505. The round hole 505 is sealed by a rubber ring 508 to prevent water leakage during transport.

[0059] Upon reaching the release point, the drive motor 601 is started in reverse, and in the same reverse linkage as above, the arc plate 6011 moves the sealing plug 605 away from the conical inlet 2, opening the fish collection box 1 to release the fish. Furthermore, during the opening and closing of the fish collection box 1, the silicone rod 608 rotates around the water inlet pipe 506 as its axis. When the fish collection box 1 is opened, the third gear 607 meshes with the rack 6014 in the crescent groove 6013, causing the silicone rod 608 to move and rotate simultaneously. Because the blade 604 is inclined on the silicone rod 608, the angle between the blade 604 and the silicone rod 608 is acute on one side and obtuse on the other. During the opening process, the rotation direction of the silicone rod 608 results in an acute angle between the blade 604 and the silicone rod 608. The rotation of the silicone rod 608 utilizes the water flow to compress the inner surface of the blade 604, generating an upward thrust that causes the blade 604 to rotate and open outwards. This continuously drives the fish from the center, increasing the release rate and preventing fish from becoming trapped inside the inner liner 503. Conversely, when the fish collection tank 1 is closed, the rotation direction of the silicone rod 608 results in an obtuse angle between the blade 604 and the silicone rod 608. Therefore, the water flow can follow the outer surface of the blade 604 without unfolding it, thus avoiding disturbing the fish that have entered the tank.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting mechanism-based fish collecting device, comprising a fish collecting box (1), a pair of tapered inlets (2) being symmetrically arranged at the center of two sides of the fish collecting box (1), a pair of mounting plates (3) being fixedly connected to the top edges of the fish collecting box (1), a protective shell (4) being fixedly connected to the middle of the fish collecting box (1), and a plurality of drainage openings (7) being equidistantly arranged at the bottom edges of the fish collecting box (1), characterized in that: Also include: The vortex fish guiding mechanism (5) is connected with the fish collecting box (1); the fish chasing and releasing mechanism (6) is connected with the vortex fish guiding mechanism (5); wherein, the vortex fish guiding mechanism (5) includes the inner bushing (503) fixed in the inner cavity of the fish collecting box (1), the inner cavity of the inner bushing (503) is fixed with the flexible spiral pad (504); the fish chasing and releasing mechanism (6) includes the rotating plate (606) slidingly abutting the inner surface of the top of the fish collecting box (1), the rotating plate (606) is rotatably connected with the silica gel rod (608); the vortex fish guiding mechanism (5) further includes the water inlet pipe (506) rotatably penetrating the top of the fish collecting box (1), the water inlet pipe (506) is fixedly communicated with the water return pipe (502) through the water pump (501), one end of the water return pipe (502) is fixedly penetrated on the protective shell (4), the other end of the water return pipe (502) extends to the lower side of the fish collecting box (1) and is fixedly penetrated in the inner bushing (503); the both sides of the inner bushing (503) are provided with circular holes (505), the inner sides of the circular holes (505) are fixedly connected with rubber rings (508), and the circular holes (505) are communicated with the tapered inlet (2); the end of the water inlet pipe (506) is fixedly communicated with the arc-shaped inclined pipe (507), and the arc-shaped inclined pipe (507) is inclined to the inner surface of the inner bushing (503).

2. The lift mechanism based fish aggregation device as claimed in claim 1, wherein: The fish chasing and releasing mechanism (6) further includes the driving motor (601) fixedly connected in the inner cavity of the protective shell (4), the output end of the driving motor (601) is drivingly connected with the first gear (602), the outer wall of the first gear (602) is engaged with the second gear (603), the second gear (603) is connected with the outer wall of the water inlet pipe (506) through the rotating ring, and the rotating ring rotatably penetrates the fish collecting box (1) and is fixedly connected with the rotating plate (606).

3. The lift mechanism based fish aggregation device as claimed in claim 2, wherein: The water inlet pipe (506) is fixedly penetrated in the center of the rotating plate (606), the inner surface of the top of the fish collecting box (1) is provided with a crescent groove (6013), and the inner side of the crescent groove (6013) is fixedly connected with a rack (6014), the top of the silica gel rod (608) is fixedly connected with a third gear (607), and the third gear (607) is engaged with the rack (6014).

4. The lift mechanism based fish aggregation device as claimed in claim 3, wherein: The side wall of the silica gel rod (608) is equidistantly rotatably connected with a plurality of blades (604), and the blades (604) are inclinedly arranged on the silica gel rod (608).

5. The lift mechanism based fish aggregation device as claimed in claim 4, wherein: The bottom of the rotating plate (606) is slidingly connected with a pair of arc-shaped plates (6011), the inner sides of the arc-shaped plates (6011) are fixedly connected with a pair of sliding push blocks (6010), and the bottom of the rotating plate (606) is fixedly connected with two pairs of sliding groove boxes (609).

6. The lift mechanism based fish aggregation device as claimed in claim 5, wherein: A pair of arc-shaped plates (6011) are equidistantly connected to ball bearings (6012) at their bottom edges. The outer walls of the ball bearings (6012) abut against the inner cavity of the fish collection box (1). A sealing plug (605) is fixed to the outer side of each arc-shaped plate (6011), and the sealing plug (605) matches the conical inlet (2).

7. A method of fish gathering using a lifting mechanism based fish gathering device as claimed in claim 6, characterized in that: The method for collecting fish is as follows: S1. Fish attraction stage: By setting up water pumps underwater or using tailwater flow, a fish attraction flow is formed at the fish collection point of the dam to simulate natural water flow and attract fish that like to swim upstream. In order to improve the attraction effect on different fish species, fish attraction lights with specific spectra, acoustic fish attraction devices that simulate feeding sounds or gathering sounds, or chemical attractants for certain fish species will also be used. S2, Fish collection stage: After the fish are induced to the fish collection area, they need to be collected into the lifting equipment. The fish in the fish collection area gather in the fishway outlet pool, enter the fish collection box (1) from the cone inlet (2), and then enter the inner liner (503). During this period, the fish are counted and the species are identified by the underwater camera. S3, Lifting and Transfer Stage: After the fish collection box (1) is filled with fish, the fish collection box (1) is vertically lifted to the release area on the top of the dam using a winch. During the lifting process, excess water overflows from the top of the inner liner (503) and is discharged through the bottom drain (7) to maintain the hydrostatic pressure of the fish collection box (1). S4. Release stage: The fish are transferred to the release point on the dam and smoothly enter the upstream reservoir through the release pool. The release point is selected in an area with gentle water flow, suitable for fish survival and avoiding natural enemies. The fish release mechanism (6) is used to drive the auxiliary fish in the box outwards through the silicone rod (608) during the opening of the fish collection box (1).

Images