A fish collecting platform and method for fish to pass over a dam

Abstract

The application discloses a fish collecting platform for fish to pass over a dam, which comprises a fish collecting assembly, the fish collecting assembly comprises a collecting box, the collecting box comprises a water permeable part and a water collecting part, the water permeable part and the water collecting part are fixedly connected, an inlet is formed in the water permeable part, an outlet is formed in the water collecting part, an opening and closing mechanism is arranged on the outlet, a fish pushing mechanism is arranged on the inlet, the collecting box is arranged in a tail water channel, a tail water hole is arranged on the tail water channel, a power generation tail water is arranged in the tail water hole, a flow increasing mechanism is arranged in the tail water channel, and a plurality of fish passing holes are arranged on the flow increasing mechanism; the auxiliary assembly comprises a plurality of support columns and a conveying mechanism, the support columns are arranged on both sides of the tail water channel, the top end of the collecting box is fixedly connected with a mounting plate, the top end of the support column is fixedly connected with a top plate, the top plate is fixedly connected with a winch, and the winch is drivingly connected with the mounting plate through a rope. The application is suitable for medium and high water head dam bodies, and different flow releasing positions can be selected according to different fishes, so that the application is more convenient in practical application.

Description

Technical Field

[0001] This invention relates to the field of fish crossing technology, and in particular to a fish collection and transportation platform and method for fish crossing dams, belonging to the field of water conservancy engineering. Background Technology

[0002] In water conservancy projects, the construction of dams often obstructs the natural flow of rivers, posing a serious threat to the survival and reproduction of aquatic organisms such as fish. Fish frequently migrate due to physiological needs, genetic factors, and external environmental influences, but the obstructive effect of dams greatly limits their range of movement and hinders the exchange of fish populations between upstream and downstream areas. To address this problem, various fish passage facilities have been tried, such as fish lifts, fishways, and fish locks, but these facilities have revealed many shortcomings in practical applications.

[0003] In the prior art, patent application number 202111337572.5 discloses a temporary fish passage and fish passage method for low-head weirs. The temporary fish passage includes several fish passage units, which cooperate with lifting units and combination units. Each fish passage unit includes a rectangular groove with a middle partition plate inside, and fish passage openings are provided on the middle partition plate. The lifting unit is located below the fish passage unit and includes a foot and a hydraulic rod. The hydraulic rod is vertically arranged, and the bottom of the foot is connected to the movable end of the hydraulic rod. The combination unit includes a sealing element for sealingly connecting multiple rectangular grooves to form a fish passage. The above device assembles a fish passage into a fish passage by splicing and disassembling fish passage units. However, this type of passage is suitable for low-head weirs. For medium- and high-head dams, the cost of constructing a fish passage is very high, and an excessively long, inclined fish passage increases the difficulty for fish to pass through, which is not fish-friendly.

[0004] In the prior art, patent application number 201910935930.9 discloses a fish-lifting machine structure to improve the fish-attracting effect. The structure includes an elevator installed on the top of the dam in the reservoir area. Downstream of the dam, there are multiple fish-attracting chambers arranged in parallel along the shore. Each fish-attracting chamber has a fish-attracting inlet. Upstream, the elevator suspends a fish-lifting box. At the top of the elevator, corresponding to the fish-attracting inlet, there is a fish-lifting box track. The fish-lifting box is placed in the fish-lifting box track, which extends from the upstream waters of the dam, through the top of the dam, to the downstream bottom. Although the above device can transport fish to the upstream waters, under normal circumstances, the water flow near the dam is relatively slow, making it difficult for fish to find the direction of the current, which is not conducive to the continued migration of some fish species.

[0005] To address these issues, a fish collection platform and method for transporting fish across dams are proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a fish collection and transportation platform and method for fish crossing dams, so as to solve the problems existing in the prior art. It is suitable for medium and high head dams, and can also facilitate the transfer of fish. The release location can be selected according to different species of fish.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a fish collection and transportation platform for fish crossing a dam, comprising:

[0008] A fish collection assembly includes a collection box, which comprises a permeable part and a water collection part, the permeable part and the water collection part being fixedly connected. The permeable part has a fish inlet, the water collection part has a discharge outlet, the discharge outlet is provided with an opening and closing mechanism, and the fish inlet is provided with a fish-pulling mechanism. The collection box is located in a tailrace channel, the tailrace channel is provided with a tailrace hole, the tailrace hole contains power generation tailrace water, the collection box is located downstream of the tailrace hole, and the tailrace channel is provided with a flow-increasing mechanism, the flow-increasing mechanism being provided with several fish passage holes.

[0009] The auxiliary component includes several pillars and a conveying mechanism. The pillars are arranged on both sides of the tailrace channel and are fixedly connected to the riverbed. An installation plate is fixedly connected to the top of the collection box. A top plate is fixedly connected to the top of the pillar. A winch is fixedly connected to the top plate. The winch is connected to the installation plate via a rope. The pillar is higher than the embankment, and the conveying mechanism is located on the embankment.

[0010] Preferably, the permeable part is a grating plate, the water collection part is fixedly connected below the permeable part, the fish-pulling mechanism includes a rotating shaft, several round tubes are fixedly connected to the permeable part, the round tubes are located on both sides of the fish inlet, the rotating shaft passes through the round tubes, the rotating shaft is rotatably arranged inside the round tubes, two limiting blocks are fixedly connected to the rotating shaft, several levers are fixedly connected to the outer edge of the rotating shaft, there is a gap between two adjacent levers arranged laterally, a motor is fixedly connected to the outside of the permeable part, the motor is drivenly connected to the rotating shaft, several straight rods are fixedly connected to the inside of the permeable part, the several straight rods are arranged laterally at intervals, the straight rods face the levers, the straight rods are located between two levers, and the straight rods do not interfere with the levers.

[0011] Preferably, the lever includes a straight section and a curved section. The straight section is fixedly connected to the rotating shaft, and the curved section is fixedly connected to the straight section. A first gear is fixedly connected to the motor output end, and a second gear is fixedly connected to the rotating shaft. The first gear meshes with the second gear.

[0012] Preferably, a discharge pipe is fixedly connected to the discharge outlet, the opening and closing mechanism includes a baffle, an insertion hole is provided on the discharge pipe, a slot is provided inside the discharge pipe, the baffle is inserted into the insertion hole, the baffle is adapted to the slot, a vertical plate is fixedly connected to the baffle, a first electric telescopic rod is fixedly connected to the discharge pipe, the first electric telescopic rod is fixedly connected to the vertical plate, a pit is provided on the bottom surface of the tailwater channel, and the discharge pipe is located in the pit.

[0013] Preferably, the flow-increasing mechanism includes a wall, which is fixedly connected to the tailrace channel. The wall has a plurality of fish passage holes, and a first pipe is fixedly connected to each fish passage hole. A flared mouth is fixedly connected to the first pipe, and the flared mouth is located upstream. A pressure plate is fixedly connected to the top of the wall.

[0014] Preferably, the mounting plate is fixedly connected to the permeable part by a plurality of connecting blocks. A plurality of connecting plates are fixedly connected to the top surface of the mounting plate. The connecting plates have mounting holes. The rope is fixedly connected to the mounting holes. A plurality of support plates are fixedly connected to the mounting plate. A first roller is fixedly connected to the support plate. A guide groove is provided on the support column. The first roller is located in the guide groove. A through hole is provided on the top plate. The rope passes through the through hole. A guide wheel is fixedly connected to the top plate. The rope is wound around the guide wheel.

[0015] Preferably, a feeding channel is provided on the embankment, the feeding channel is connected to the tailrace tunnel, a water pump is fixedly connected to the embankment, the water inlet of the water pump is connected to a first water pipe, the first water pipe extends into the tailrace tunnel, and the water outlet of the water pump is connected to a second water pipe, the second water pipe extends into the feeding channel.

[0016] Preferably, the conveying mechanism includes a first material chute, a second material chute slidably connected to the outside of the first material chute, the first material chute being fixedly connected to the embankment by a first support rod, a first seat plate being fixedly connected to the first material chute, a second electric telescopic rod being fixedly connected to the first seat plate, a second seat plate being fixedly connected to the second material chute, the output end of the second electric telescopic rod being fixedly connected to the second seat plate, a U-shaped frame being provided outside the second material chute, the U-shaped frame being fixedly connected to the second support rod, and the second support rod being fixedly connected to the embankment.

[0017] Preferably, the U-shaped frame has several mounting slots, and several second rollers are installed in the mounting slots, with the second rollers abutting against the second material sliding groove.

[0018] A method for transporting fish across a dam includes the following steps:

[0019] Step 1: Use a winch to lower the collection box into the tailrace channel;

[0020] Step 2: Activate the fish-attracting mechanism on the collection box. After the water flows out of the tailwater hole, it passes through the permeable part and then through the flow-increasing mechanism, which increases the flow rate of the water, thereby attracting more migratory fish.

[0021] Step 3: After passing through the fish hole, the fish will enter the collection box with the help of the fish-pulling mechanism;

[0022] Step 4: After a certain number of fish have been collected, the collection box is lifted by a winch. Once the collection box is raised to the predetermined position, the conveyor is extended below the outlet. The outlet is opened by the opening and closing mechanism to discharge the fish. A transport vehicle is placed downstream of the conveyor, and the fish will enter the transport vehicle to be transferred upstream.

[0023] This invention discloses the following technical advantages: In this device, the permeable section facilitates the passage of water from the tailrace tunnel, the water collection section is used to hold water and fish. When the collection box is pulled out of the water, a certain amount of water remains in the collection section, containing fish. The fish inlet facilitates the entry of fish into the collection box. The water generated during power generation is discharged into the tailrace channel through the tailrace tunnel. The opening and closing mechanism controls the outlet, and the flow-increasing mechanism can increase the water flow velocity to a certain extent, thus attracting more fish. The support pillar is fixed to the riverbed, and the winch uses ropes to pull the collection box up and down. When the collection box is raised, the conveying mechanism extends below the outlet, the opening and closing mechanism opens, and the water and fish are released. They are then transported to a transport vehicle by the conveying mechanism, and then released to a suitable location according to the type of fish, thus facilitating the transfer of fish. This invention is applicable to medium- and high-head dams and also facilitates the selection of different release locations according to different types of fish, making it more convenient in practical applications. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the fish collection and transportation platform structure for fish crossing the dam according to the present invention;

[0026] Figure 2 for Figure 1 A magnified view of part 'a' in the diagram;

[0027] Figure 3 for Figure 1 A magnified view of part b in the diagram;

[0028] Figure 4 for Figure 1 A magnified view of part of c;

[0029] Figure 5 for Figure 1 A magnified view of part of d;

[0030] Figure 6 This is a partial structural diagram of the collection box 1 of the present invention;

[0031] Figure 7 This is a top sectional view of the first pipe and the bell mouth of the present invention;

[0032] The components include: 1. Collection box; 2. Permeable section; 3. Water collection section; 4. Fish inlet; 5. Discharge outlet; 6. Tailwater channel; 7. Tailwater tunnel; 8. Support column; 9. Mounting plate; 10. Top plate; 11. Winch; 12. Rope; 13. Embankment; 14. Shaft; 15. Circular pipe; 16. Limiting block; 17. Lever; 18. Motor; 19. Straight section; 20. Bend section; 21. First gear; 22. Second gear; 23. Discharge pipe; 24. Baffle; 25. Vertical plate; 26. First electric telescopic rod; 27. Recess; 28. Wall; 29. ​​First pipe; 30. Trumpet mouth; 31. Pressure plate; 32. Connecting plate; 33. Mounting hole; 34. Support plate; 35. First roller; 36. Guide wheel; 37. Feeding channel; 38. Water pump; 39. First water pipe; 40. Second water pipe; 41. First material chute; 42. Second material chute; 43. First support rod; 44. First seat plate; 45. Second electric telescopic rod; 46. Second seat plate; 47. U-shaped frame; 48. Second support rod; 49. Second roller; 50. Straight rod. Detailed Implementation

[0033] 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.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Reference Figure 1-7 This invention provides a fish collection and transportation platform for fish crossing a dam, comprising:

[0036] Fish collection assembly includes a collection box 1, which includes a permeable part 2 and a water collection part 3. The permeable part 2 and the water collection part 3 are fixedly connected. The permeable part 2 has a fish inlet 4, and the water collection part 3 has a discharge outlet 5. The discharge outlet 5 is equipped with an opening and closing mechanism, and the fish inlet 4 is equipped with a fish-pulling mechanism. The collection box 1 is located in the tailwater channel 6. The tailwater channel 6 is equipped with a tailwater hole 7, which contains tailwater for power generation. The collection box 1 is located downstream of the tailwater hole 7. The tailwater channel 6 is equipped with a flow-increasing mechanism, which is equipped with several fish passage holes.

[0037] The auxiliary components include several support columns 8 and a conveying mechanism. The support columns 8 are set on both sides of the tailrace channel 6 and are fixedly connected to the riverbed. The top of the collection box 1 is fixedly connected to the mounting plate 9, and the top of the support column 8 is fixedly connected to the top plate 10. The top plate 10 is fixedly connected to the winch 11, and the winch 11 is connected to the mounting plate 9 through the rope 12. The support columns 8 are higher than the embankment 13, and the conveying mechanism is located on the embankment 13.

[0038] When in use, the collection box 1 is below the water surface. The permeable part 2 allows water from the tailrace tunnel 7 to pass through. The water collection part 3 is used to collect water and fish. When the collection box 1 is pulled out of the water, a certain amount of water will remain in the water collection part 3. There are fish in the water. The fish inlet 4 allows fish to enter the collection box 1. The water after power generation is discharged into the tailrace channel 6 through the tailrace tunnel 7. The opening and closing mechanism is used to control the outlet 5. The flow enhancement mechanism can increase the water flow rate to a certain extent, which can attract more fish. The support column 8 is fixed to the river bottom. The winch 11 pulls the collection box 1 up and down through the rope 12. When the collection box 1 is lifted, the conveying mechanism extends below the outlet 5, the opening and closing mechanism opens, and the water and fish are released. They are then transported to the transport vehicle through the conveying mechanism. Then, according to the type of fish, the fish are released to a suitable location, which facilitates the transfer of fish.

[0039] The scheme is further optimized. The permeable part 2 is a grid plate. The water collection part 3 is fixedly connected to the bottom of the permeable part 2. The fish-pulling mechanism includes a rotating shaft 14. Several round tubes 15 are fixedly connected to the permeable part 2. The round tubes 15 are located on both sides of the fish inlet 4. The rotating shaft 14 passes through the round tubes 15 and rotates within the round tubes 15. Two limiting blocks 16 are fixedly connected to the rotating shaft 14. Several levers 17 are fixedly connected to the outer edge of the rotating shaft 14. There is a gap between two adjacent levers 17 arranged laterally. A motor 18 is fixedly connected to the outside of the permeable part 2. The motor 18 is connected to the rotating shaft 14 for transmission. Several straight rods 50 are fixedly connected to the inside of the permeable part 2. The straight rods 50 are arranged laterally at intervals. The straight rods 50 face the levers 17 and are located between two levers 17. The straight rods 50 do not interfere with the levers 17.

[0040] The grating facilitates water flow, while the water collection section 3 is impermeable. The height of the water collection section 3 is slightly less than that of the permeable section 2 to minimize the impact on water flow. The motor 18 drives the rotating shaft 14 to rotate, which in turn drives several levers 17 to rotate. The levers 17 guide the fish into the collection box 1. To prevent the fish from swimming out of the collection box 1 along with the levers 17, when the levers 17 rotate, the straight rod 50 is positioned between two adjacent levers 17. Before the levers 17 rotate out of the collection box 1, the fish in front of the levers 17 can be blocked, preventing them from swimming out of the collection box 1 as the levers 17 rotate. In this embodiment, the rotating shaft 14 rotates slowly to prevent injury to the fish.

[0041] The scheme is further optimized. The lever 17 includes a straight section 19 and a curved section 20. The straight section 19 is fixedly connected to the rotating shaft 14, and the curved section 20 is fixedly connected to the straight section 19. The output end of the motor 18 is fixedly connected to a first gear 21, and the rotating shaft 14 is fixedly connected to a second gear 22. The first gear 21 and the second gear 22 mesh.

[0042] Motor 18 drives the first gear 21 to rotate, the first gear 21 drives the second gear 22 to rotate, and the second gear 22 drives the rotating shaft 14 to rotate.

[0043] The scheme is further optimized. A discharge pipe 23 is fixedly connected to the discharge outlet 5. The opening and closing mechanism includes a baffle 24. An insertion hole is opened on the discharge pipe 23. A slot is opened inside the discharge pipe 23. The baffle 24 is inserted into the insertion hole and is adapted to the slot. A vertical plate 25 is fixedly connected to the baffle 24. A first electric telescopic rod 26 is fixedly connected to the discharge pipe 23. The first electric telescopic rod 26 is fixedly connected to the vertical plate 25. A pit 27 is opened on the bottom surface of the tailwater channel 6. The discharge pipe 23 is located in the pit 27.

[0044] The discharge pipe 23 facilitates the discharge of water and fish from the water collection section 3. When the discharge pipe 23 needs to be opened, the first electric telescopic rod 26 is activated. The first electric telescopic rod 26 extends, driving the upright plate 25 and the baffle 24 to move, thereby opening the discharge pipe 23. When closing the discharge pipe 23, the first electric telescopic rod 26 is retracted.

[0045] The scheme is further optimized. The flow-increasing mechanism includes a wall 28, which is fixedly connected to the tailrace channel 6. Several fish passage holes are opened on the wall 28. A first pipe 29 is fixedly connected to the fish passage holes. A bell mouth 30 is fixedly connected to the first pipe 29. The bell mouth 30 is located upstream. A pressure plate 31 is fixedly connected to the top of the wall 28.

[0046] The wall 28 is located inside the tailwater channel 6. When the water flows out from the tailwater hole 7 and passes through the collection box 1, most of it is still in the tailwater channel 6. The water will enter the first pipe 29 through the funnel 30, thereby increasing the flow rate of the water, which can attract fish downstream. The pressure plate 31 can gather a certain amount of water flow and concentrate the water flow.

[0047] The scheme is further optimized. The mounting plate 9 is fixedly connected to the permeable part 2 through several connecting blocks. Several connecting plates 32 are fixedly connected to the top surface of the mounting plate 9. The connecting plates 32 are provided with mounting holes 33. The rope 12 is fixedly connected in the mounting holes 33. Several support plates 34 are fixedly connected to the mounting plate 9. The support plates 34 are fixedly connected with the first roller 35. The support column 8 is provided with a guide groove. The first roller 35 is located in the guide groove. The top plate 10 is provided with a through hole. The rope 12 passes through the through hole. The top plate 10 is fixedly connected with a guide wheel 36. The rope 12 is wound around the guide wheel 36.

[0048] Mounting plate 9 is slidably connected to support column 8 via first roller 35. When winch 11 raises and lowers collection box 1, first roller 35 slides on support column 8, which makes collection box 1 more stable.

[0049] The scheme is further optimized by setting up a feeding channel 37 on the embankment 13, which is connected to the tailrace tunnel 7. A water pump 38 is fixedly connected to the embankment 13. The water inlet of the water pump 38 is connected to a first water pipe 39, which extends into the tailrace tunnel 7. The water outlet of the water pump 38 is connected to a second water pipe 40, which extends into the feeding channel 37.

[0050] The feeding channel 37 facilitates the feeding of fish food, which can attract fish and replenish their energy. The water pump 38 pumps water from the tailwater hole 7 into the feeding channel 37, making it easy to flush the fish food into the tailwater channel 6.

[0051] The scheme is further optimized. The conveying mechanism includes a first material chute 41, a second material chute 42 slidably connected to the outside of the first material chute 41, the first material chute 41 being fixedly connected to the embankment 13 by a first support rod 43, a first seat plate 44 being fixedly connected to the first material chute 41, a second electric telescopic rod 45 being fixedly connected to the first seat plate 44, a second seat plate 46 being fixedly connected to the second material chute 42, the output end of the second electric telescopic rod 45 being fixedly connected to the second seat plate 46, a U-shaped frame 47 being provided outside the second material chute 42, the U-shaped frame 47 being fixedly connected to a second support rod 48, and the second support rod 48 being fixedly connected to the embankment 13.

[0052] Once the collection box 1 is raised to the designated position, the second electric telescopic rod 45 is activated. The second electric telescopic rod 45 drives the second sliding trough 42 to slide out and extend below the discharge pipe 23 for easy fish transport. The U-shaped frame 47 is used to support the second sliding trough 42. The first sliding trough 41 is inside the second sliding trough 42. A sliding strip is fixedly connected to the outer wall of the first sliding trough 41, and a sliding groove is fixedly connected to the side wall of the second sliding trough 42. The sliding strip is located inside the sliding groove, which can prevent the first sliding trough 41 and the second sliding trough 42 from separating.

[0053] The scheme is further optimized by providing several mounting slots inside the U-shaped frame 47, and installing several second rollers 49 inside the mounting slots. The second rollers 49 abut against the second material sliding groove 42.

[0054] The second roller 49 makes the second material chute 42 slide more flexibly.

[0055] A method for transporting fish across a dam includes the following steps:

[0056] Step 1: The rope 12 is released by the winch 11, the collection box 1 moves down, and the first roller 35 is located in the guide groove, which will make the collection box 1 more stable, so that the collection box 1 is placed into the tailrace channel 6.

[0057] Step 2: Activate the fish-pulling mechanism on the collection box 1. The motor 18 drives the first gear 21 to rotate, the first gear 21 drives the second gear 22 to rotate, the second gear 22 drives the rotating shaft 14 to rotate, and the rotating shaft 14 drives several levers 17 to rotate. The levers 17 pull the fish into the collection box 1. When the levers 17 rotate, the straight rod 50 is located between two adjacent levers 17. Before the levers 17 rotate out of the collection box 1, the fish in front of the levers 17 can be blocked, preventing the fish from swimming out of the collection box 1 as the levers 17 rotate. After the water flows out of the tailwater hole, the water flows through the permeable part 2 and enters the first pipe 29 through the funnel 30, thereby increasing the flow rate of the water, which is more attractive to migratory fish.

[0058] Step 3: After passing through the first pipe 29, the fish will enter the collection box 1 with the assistance of the fish-pulling mechanism;

[0059] Step 4: After a certain number of fish have been collected, the collection box 1 is lifted by the winch 11. After the collection box 1 is lifted to the predetermined position, the second electric telescopic rod 45 is activated. The second electric telescopic rod 45 drives the second sliding chute 42 to slide out and extend to the bottom of the discharge pipe 23. The first electric telescopic rod 26 is activated. The first electric telescopic rod 26 extends and drives the upright plate 25 and the baffle 24 to move, thereby opening the discharge pipe 23 and discharging the fish inside. A transport vehicle is placed downstream of the conveying mechanism. The fish will enter the transport vehicle and be transferred upstream.

[0060] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0061] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A fish collection and transportation platform for fish crossing a dam, characterized in that... ,include: Fish collection assembly, the fish collection assembly includes a collection box (1), the collection box (1) includes a permeable part (2) and a water collection part (3), the permeable part (2) and the water collection part (3) are fixedly connected, the permeable part (2) is provided with a fish inlet (4), the water collection part (3) is provided with a discharge outlet (5), the discharge outlet (5) is provided with an opening and closing mechanism, the fish inlet (4) is provided with a fish-pulling mechanism, the collection box (1) is located in the tailwater channel (6), the tailwater channel (6) is provided with a tailwater hole (7), the tailwater hole (7) contains power generation tailwater, the collection box (1) is located downstream of the tailwater hole (7), the tailwater channel (6) is provided with a flow-increasing mechanism, the flow-increasing mechanism is provided with several fish passage holes; The auxiliary components include several pillars (8) and a conveying mechanism. The pillars (8) are set on both sides of the tailrace channel (6). The pillars (8) are fixedly connected to the riverbed. The top of the collection box (1) is fixedly connected to the mounting plate (9). The top of the pillar (8) is fixedly connected to the top plate (10). The top plate (10) is fixedly connected to the winch (11). The winch (11) is connected to the mounting plate (9) via a rope (12). The pillars (8) are higher than the embankment (13). The conveying mechanism is located on the embankment (13). A discharge pipe (23) is fixedly connected to the outlet (5). The opening and closing mechanism includes a baffle (24). An insertion hole is provided on the discharge pipe (23). A slot is provided inside the discharge pipe (23). The baffle (24) is inserted into the insertion hole. The baffle (24) is adapted to the slot. A vertical plate (25) is fixedly connected to the baffle (24). A first electric telescopic rod (26) is fixedly connected to the discharge pipe (23). The first electric telescopic rod (26) is fixedly connected to the vertical plate (25). A pit (27) is provided on the bottom surface of the tailwater channel (6). The discharge pipe (23) is located in the pit (27). The flow boosting mechanism includes a wall (28), which is fixedly connected to the tailwater channel (6). The wall (28) has several fish passage holes, and a first pipe (29) is fixedly connected to each fish passage hole. A flared mouth (30) is fixedly connected to the first pipe (29), and the flared mouth (30) is located upstream. A pressure plate (31) is fixedly connected to the top of the wall (28). A feeding channel (37) is provided on the embankment (13), the feeding channel (37) is connected to the tailwater tunnel (7), a water pump (38) is fixedly connected on the embankment (13), the water inlet of the water pump (38) is connected to a first water pipe (39), the first water pipe (39) extends into the tailwater tunnel (7), the water outlet of the water pump (38) is connected to a second water pipe (40), the second water pipe (40) extends into the feeding channel (37); The conveying mechanism includes a first material chute (41), a second material chute (42) is slidably connected to the outside of the first material chute (41), the first material chute (41) is fixedly connected to the embankment (13) by a first support rod (43), a first seat plate (44) is fixedly connected to the first material chute (41), a second electric telescopic rod (45) is fixedly connected to the first seat plate (44), a second seat plate (46) is fixedly connected to the second material chute (42), the output end of the second electric telescopic rod (45) is fixedly connected to the second seat plate (46), a U-shaped frame (47) is provided outside the second material chute (42), the U-shaped frame (47) is fixedly connected to the second support rod (48), and the second support rod (48) is fixedly connected to the embankment (13).

2. A fish collection and transportation platform for fish crossing a dam according to claim 1, characterized in that: The permeable part (2) is a grating plate, and the water collection part (3) is fixedly connected below the permeable part (2). The fish-pulling mechanism includes a rotating shaft (14). Several round tubes (15) are fixedly connected to the permeable part (2). The round tubes (15) are located on both sides of the fish inlet (4). The rotating shaft (14) passes through the round tubes (15) and rotates within the round tubes (15). Two limiting blocks (16) are fixedly connected to the rotating shaft (14). The outer edge of the rotating shaft (14) is fixedly connected to... Several levers (17) are arranged horizontally with a gap between adjacent levers (17). A motor (18) is fixedly connected to the outside of the permeable part (2). The motor (18) is connected to the rotating shaft (14) for transmission. Several straight rods (50) are fixedly connected inside the permeable part (2). The several straight rods (50) are arranged horizontally at intervals. The straight rods (50) face the levers (17). The straight rods (50) are located between two levers (17). The straight rods (50) do not interfere with the levers (17).

3. A fish collection and transportation platform for fish crossing a dam according to claim 2, characterized in that: The lever (17) includes a straight section (19) and a curved section (20). The straight section (19) is fixedly connected to the rotating shaft (14), and the curved section (20) is fixedly connected to the straight section (19). A first gear (21) is fixedly connected to the output end of the motor (18), and a second gear (22) is fixedly connected to the rotating shaft (14). The first gear (21) meshes with the second gear (22).

4. A fish collection and transportation platform for fish crossing a dam according to claim 1, characterized in that: The mounting plate (9) is fixedly connected to the permeable part (2) by several connecting blocks. Several connecting plates (32) are fixedly connected to the top surface of the mounting plate (9). The connecting plates (32) have mounting holes (33). The rope (12) is fixedly connected in the mounting holes (33). Several support plates (34) are fixedly connected to the mounting plate (9). A first roller (35) is fixedly connected to the support plate (34). A guide groove is provided on the support column (8). The first roller (35) is located in the guide groove. A through hole is provided on the top plate (10). The rope (12) passes through the through hole. A guide wheel (36) is fixedly connected to the top plate (10). The rope (12) is wound around the guide wheel (36).

5. A fish collection and transportation platform for fish crossing a dam according to claim 1, characterized in that: The U-shaped frame (47) has several mounting slots, and several second rollers (49) are installed in the mounting slots. The second rollers (49) abut against the second sliding groove (42).

6. A method for collecting and transporting fish across a dam, based on the fish collection and transport platform for collecting and transporting fish across a dam as described in claim 1, comprising the following steps: Step 1: Use a winch (11) to place the collection box (1) into the tailrace channel (6); Step 2: Activate the fish-attracting mechanism on the collection box (1). After the water flows out of the tailwater hole, the water flows through the permeable part (2) and then through the flow-increasing mechanism, which will increase the flow rate of the water, thereby attracting more migratory fish. Step 3: After passing through the fish hole, the fish will enter the collection box (1) with the assistance of the fish-pulling mechanism; Step 4: After a certain number of fish have been collected, the collection box (1) is lifted by the winch (11). After the collection box (1) is lifted to the predetermined position, the conveying mechanism is extended to the bottom of the outlet (5). The outlet (5) is opened by the opening and closing mechanism to discharge the fish inside. A transport vehicle is placed downstream of the conveying mechanism. The fish will enter the transport vehicle and thus be transferred upstream.

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