Flow-dividing fixed-point type fish dam-passing facility capable of improving migration survival rate

Abstract

The invention provides a diversion fixed-point type fish dam-passing facility capable of improving migration survival rate, and relates to the field of ecological protection, the diversion fixed-point type fish dam-passing facility comprises a slope flow channel, the slope flow channel is fixedly installed on one side of a dam, the slope flow channel is provided with two water flow areas from high to low, and the top of each water flow area is provided with a regulation and control mechanism used for regulating the water flow rate; the device further comprises a slow stop table, a flow guide block, a high-speed channel, a low-speed channel, a rotational flow structural part, a safety warning component and a fish partition channel. Upflowing water flows into a water flow area through the regulation and control mechanism, the electric push rod stretches and retracts to drive the rotating rod to push the baffle to rotate, so that the gap between the baffle and the drainage pipe is adjusted, the water flow is adjusted, and the discharged water flow forms a high-speed channel and a low-speed channel between the slow stop table and the flow guide block; the movement direction of water flow is changed when the water flow passes through the flow guide block, water in the high-speed channel basically flows in the high-speed channel, and therefore fishes can select the low-speed channel to pass through the dam, risks are reduced, and the migration survival rate is increased.

Description

Technical Field

[0001] This invention relates to the field of ecological protection, and more specifically, to a diversion-type fixed-point fish crossing dam facility to improve the survival rate of migrating fish. Background Technology

[0002] Migration is a special form of movement in fish, characterized by active, regular, directional, and gregarious horizontal movement. It is also a periodic movement, repeating annually throughout the fish's life cycle. Migration is the result of fish adapting to changes in external environmental conditions over a long period, and also a natural response to external stimuli as internal physiological changes in fish develop to a certain extent.

[0003] However, dams built on rivers obstruct fish migration, posing a serious threat to fish life and the continuation of their species. Therefore, to protect the ecological balance of river fish, it is necessary to construct fish passage structures or other fish protection measures to properly solve the problem of migrating fish crossing dams. Types of fish passage structures mainly include fishways, fish locks, fish lifts, and fish transport vessels. Fishways mainly include eco-friendly, partitioned, trough-type, and special structural types.

[0004] Existing fishways typically have intermittently installed horizontal or inclined baffles, allowing fish to swim across them by jumping. However, this method of crossing the baffle can easily cause fish to be injured by the impact of the water flow and creates significant resistance. Therefore, we propose an improved diversion-type fixed-point fish crossing facility to increase the survival rate of migrating fish. Summary of the Invention

[0005] The purpose of this invention is to provide a diversion-type fixed-point fish crossing dam facility to improve the survival rate of migrating fish. This solves the problem that traditional dam crossing methods can easily cause fish to be damaged by the impact of water flow and create a large resistance for fish to cross the dam.

[0006] The application is as follows:

[0007] A diversion-type fixed-point fish crossing facility for improving migratory survival rates includes an inclined flow channel fixedly installed on one side of a dam. The inclined flow channel has two water flow zones descending from high to low. A regulating mechanism for adjusting the water flow velocity is installed at the top of each water flow zone. The regulating mechanism can adjust the water flow magnitude. The facility also includes:

[0008] The resting platform is shaped like a raindrop and has a hollow interior to form a resting area. The side wall has a channel for fish to swim through. Multiple resting platforms are arranged in two groups at equal intervals in the water flow area. When fish get tired, they can enter the resting platform to rest. The pressure inside the resting platform is low, and a large amount of water flows on the outside of the platform, making the fish more comfortable.

[0009] A flow guide block is located between two stopping platforms. The flow guide block has a straight surface that is parallel to the inner wall of the water flow area and an inclined surface that is parallel to the side wall of the stopping platform. When the water flows through the flow guide block, it will directly impact the flow guide block, thereby changing the flow direction so that the water flow can form a regular path flow.

[0010] The slow-stop platform and the guide block together enclose the central area of ​​the water flow zone to form a high-speed channel, and the slow-stop platform and the guide block together form a low-speed channel on the side wall of the water flow zone. The low-speed channel is suitable for fish movement, and the high channel can discharge water flow.

[0011] A vortex structure is provided at the confluence and turning point of the high-speed channel. The vortex structure is used to reduce the impact of the high-speed water flow and generate centrifugal force to help fish leave the high-speed channel. When the water flows through the vortex structure, it will flow inside the structure of the vortex structure, thereby slowly forming a vortex. When the vortex appears, centrifugal force will be generated, and the fish can swim out of the high-speed channel at the edge.

[0012] Safety warning components are installed at the outlet of the dam to form a virtual barrier to prevent fish from colliding with the dam and guide them into suitable channels. The placement of safety warning components can effectively reduce the risk of fish colliding with the dam and improve the survival rate of fish.

[0013] Fish zoning channels are installed at the top of the sloping flow channel and separated from the water flow area by an isolation wall. Within the fish zoning channels, fish are transported to different areas, thereby improving the survival rate of the fish.

[0014] As a preferred technical solution of this application, the control mechanism includes a diversion pipe fixedly connected to the top of the water flow zone. A baffle is rotatably connected to the inner wall of the diversion pipe. The baffle can be flipped relative to the diversion pipe to adjust the opening size of the diversion pipe. When the baffle rotates, the opening size can be adjusted, thereby adjusting the discharge water flow rate.

[0015] As a preferred technical solution of this application, the control mechanism further includes an electric push rod hinged to the outer wall of the drainage tube. One end of the electric push rod is rotatably connected to a rotating rod, and one end of the rotating rod is fixedly connected to the rotation shaft of the baffle. The electric push rod is used for adjustment and control. When the electric push rod extends or retracts, it can directly push the rotating rod to rotate, thereby causing the baffle to rotate. The baffle has a support shaft that passes through the drainage tube, and the support shaft is installed on the side wall of the drainage tube through a bearing.

[0016] As a preferred technical solution of this application, a speed-reducing plate is fixedly installed on the inner wall of the low-speed channel. The inlet end of the speed-reducing plate and the inclined flow channel form an arc transition. When the water flow is in the arc transition area, a water jump is formed to reduce the water flow velocity and form a barrier to prevent fish from being swept down. The speed-reducing plate can form a drop of different heights. When the water flow impacts the high place, it can form resistance, thereby reducing the water flow velocity, and at the same time, it can also form a pause zone.

[0017] As a preferred technical solution of this application, the vortex structure is a plate structure formed by spiral winding. The height of the middle position of the vortex structure is greater than the height of the edge position. The use of a spiral plate structure allows water to flow from the outside to the inside along the spiral plate, thus forming a vortex structure due to the rotating water flow.

[0018] As a preferred technical solution of this application, the safety warning component includes a support base fixedly connected to the outlet end of the dam. A nozzle is fixedly installed on the inner side wall of the support base. The two nozzles are detachably connected through an adapter. The nozzles are fixed by the support base, which can improve the stability of the nozzles. The two nozzles are detachably connected through the adapter, which facilitates assembly.

[0019] As a preferred technical solution of this application, the side wall of the nozzle is provided with multiple air outlet holes. The safety warning component also includes a high-pressure air pump fixedly connected to the side wall of the dam. The air outlet of the high-pressure air pump is fixedly connected to the nozzle through a connecting pipe. The high-pressure air pump delivers high-pressure gas into the connecting pipe and then into the nozzle, and is discharged through the air outlet holes on the outer wall of the nozzle. The air bubbles form an isolation barrier as they move upward, which can effectively block fish from swimming.

[0020] As a preferred technical solution of this application, the inner wall of the fish zoning channel is divided into a shallow rapid current channel and a deep pool slow current channel by a partition. The shallow rapid current channel is equipped with a small fish barrier net for small fish to pass through, and the deep pool slow current channel is equipped with a large fish barrier net for large fish to pass through. The setting of the large fish barrier net and the small fish barrier net allows large fish to enter other areas, effectively improving the survival rate of small fish.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] In the scheme of this application:

[0023] 1. Through the setting of inclined flow channel, water flow zone, control mechanism, slowing platform, guide block, vortex mechanism, high-speed channel and low-speed channel, the upstream water flows into the water flow zone through the control mechanism. When it is necessary to adjust the water flow, the electric push rod can be activated. The extension and retraction of the electric push rod can drive the rotating rod to push the baffle to rotate, thereby adjusting the gap between the baffle and the diversion pipe to adjust the water flow. The discharged water flow forms a high-speed channel and a low-speed channel between the slowing platform and the guide block. The water flow changes direction when it passes through the guide block. The water in the high-speed channel basically flows in the high-speed channel. Therefore, fish can choose the low-speed channel to cross the dam, thereby reducing the risk and improving the survival rate of migration. When fish are tired, they can enter the slowing platform to rest, avoiding death due to excessive fatigue. At the same time, when fish accidentally enter the high-speed channel, they can easily change direction and enter the low-speed area in the vortex area formed by the vortex structure.

[0024] 2. By installing safety warning components, fish-zoned channels, and speed-reducing plates, speed-reducing plates can be placed in the low-speed channel to create a water jump phenomenon, thereby further reducing the water flow velocity and blocking the downward flow of fish. When the fish swim to the top, they jump into the fish-zoned channels. Small fish swim out through the small fish net and enter the shallow rapid channel, while large fish swim out through the large fish net and enter the deep pool slow channel. The high-pressure air pump delivers high-pressure gas to the nozzle through the connecting pipe. The gas moves upward in the water to form a bubble barrier, thereby preventing fish from directly hitting the dam. At the same time, an opening is formed at the location of the migration channel, allowing fish to enter the migration channel. Attached Figure Description

[0025] Figure 1 A three-dimensional structural diagram of a diversion-type fixed-point fish crossing dam facility for improving the survival rate of migrating fish, provided for this application;

[0026] Figure 2 This application provides a diversion and fixed-point fish crossing dam facility to improve the survival rate of migrating fish. Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 A partial structural schematic diagram of a diversion-type fixed-point fish crossing dam facility for improving the survival rate of migrating fish, provided for this application;

[0028] Figure 4 A side view cross-sectional schematic diagram of a diversion-type fixed-point fish crossing dam facility for improving the survival rate of migrating fish, provided for this application;

[0029] Figure 5 A schematic diagram of the main structure of a diversion-type fixed-point fish crossing dam facility to improve the survival rate of migrating fish, provided in this application;

[0030] Figure 6 A top view of the inclined channel structure of a diversion and fixed-point fish crossing dam facility for improving the survival rate of migrating fish, provided in this application;

[0031] Figure 7 A schematic diagram of the water flow structure of a diversion-type fixed-point fish dam crossing facility to improve the survival rate of migrating fish, provided for this application;

[0032] Figure 8 A schematic diagram of the cross-sectional structure of a fish zoning channel in a diversion-type fixed-point fish crossing dam facility for improving the survival rate of migrating fish, provided in this application;

[0033] Figure 9 This application provides a schematic diagram of the inclined flow channel and deceleration plate of a diversion-type fixed-point fish crossing dam facility for improving the survival rate of migrating fish.

[0034] The image shows:

[0035] 10. Inclined flow channel; 11. Dam; 12. Flow zone; 13. High-speed channel; 14. Low-speed channel; 15. Swirl structure; 16. Isolation wall; 17. Speed ​​reduction plate;

[0036] 20. Control mechanism; 22. Drainage tube; 23. Baffle; 24. Electric push rod; 25. Rotating rod;

[0037] 30. Stop platform; 31. Through channel;

[0038] 40. Guide block; 41. Straight surface; 42. Inclined surface;

[0039] 50. Safety warning components; 51. Support base; 52. Nozzle; 53. Adapter; 54. High-pressure air pump; 55. Connecting pipe; 56. Air outlet orifice;

[0040] 60. Fish-zoned passageway; 61. Divider; 62. Small fish barrier net; 63. Large fish barrier net. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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.

[0042] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not 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. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Please see Figures 1 to 9 This invention provides a technical solution: a diversion-type fixed-point fish crossing facility to improve the survival rate of migrating fish, including an inclined flow channel 10, which is fixedly installed on one side of a dam 11. The inclined flow channel 10 has two water flow zones 12 from high to low. A regulating mechanism 20 for adjusting the water flow velocity is installed at the top of the water flow zone 12. The regulating mechanism 20 can adjust the water flow size. The facility also includes:

[0047] The resting platform 30 is generally shaped like a raindrop and has a hollow interior to form a resting area. The side wall has a channel 31 for fish to swim in. Multiple resting platforms 30 are arranged in two groups at equal intervals in the water flow area 12. When fish get tired, they can enter the resting platform 30 to rest. The pressure inside the resting platform 30 is relatively low, and a large amount of water flows on the outside of the resting platform 30, making the fish more comfortable.

[0048] The guide block 40 is located between the two stopping platforms 30. The guide block 40 has a straight surface 41 that is parallel to the inner side wall of the water flow area 12, and a slope 42 that is parallel to the side wall of the stopping platform 30. When the water flows through the guide block 40, it will directly impact the guide block 40, thereby changing the flow direction so that the water flow can form a regular path flow.

[0049] The slow-stop platform 30 and the guide block 40 together enclose the central area of ​​the water flow zone 12 to form a high-speed channel 13, and the slow-stop platform 30 and the guide block 40 together form a low-speed channel 14 on the side wall of the water flow zone 12. The low-speed channel is suitable for fish to move, and the high-speed channel can discharge water.

[0050] A vortex structure 15 is provided at the confluence and turning point of the high-speed channel 13. The vortex structure 15 is used to reduce the impact of the high-speed water flow and generate centrifugal force to help fish leave the high-speed channel 13. When the water flows through the vortex structure 15, it will flow within the structure of the vortex structure 15, thus slowly forming a vortex. When a vortex appears, centrifugal force will be generated, and fish can swim out of the high-speed channel 13 at the edge.

[0051] Safety warning component 50 is installed at the outlet end of dam 11 to form a virtual barrier to prevent fish from hitting dam 11 and guide fish into a suitable channel. The arrangement of safety warning component 50 can effectively reduce the risk of fish hitting dam 11 and improve the survival rate of fish.

[0052] The fish partition channel 60 is installed at the top of the inclined flow channel 10 and separated from the water flow area 12 by the isolation jump wall 16. Within the fish partition channel, fish are transported to different areas, thereby improving the survival rate of the fish.

[0053] As a preferred embodiment, based on the above method, the control mechanism 20 further includes a diversion pipe 22 fixedly connected to the top of the water flow zone 12. A baffle 23 is rotatably connected to the inner wall of the diversion pipe 22. The baffle 23 can be flipped relative to the diversion pipe 22 to adjust the opening size of the diversion pipe 22. When the baffle 23 rotates, the opening size can be adjusted, thereby adjusting the discharge water flow rate.

[0054] The control mechanism 20 also includes an electric push rod 24 hinged to the outer wall of the drainage tube 22. One end of the electric push rod 24 is rotatably connected to a rotating rod 25. One end of the rotating rod 25 is fixedly connected to the rotation shaft of the baffle 23. The electric push rod 24 is used for adjustment and control. When the electric push rod 24 extends or retracts, it can directly push the rotating rod 25 to rotate, thereby causing the baffle 23 to rotate. The baffle 23 has a support shaft that passes through the drainage tube 23. The support shaft is installed on the side wall of the drainage tube 23 through a bearing.

[0055] As a preferred embodiment, based on the above method, a speed-reducing plate 17 is further fixedly installed on the inner wall of the low-speed channel 14. The inlet end of the speed-reducing plate 17 and the inclined flow channel 10 form an arc transition. When the water flow is in the arc transition area, a water jump is formed to reduce the water flow velocity and form a barrier to prevent fish from being swept down. The speed-reducing plate 17 can form a drop of different heights. When the water flow impacts the high place, it can form resistance, thereby reducing the water flow velocity, and at the same time, it can also form a pause zone.

[0056] The vortex structure 15 is a plate structure formed by spiral winding. The height of the middle position of the vortex structure 15 is greater than the height of the edge position. The use of a spiral plate structure allows water to flow from the outside to the inside along the spiral plate, thus forming a vortex structure due to the rotating water flow.

[0057] As a preferred embodiment, based on the above method, the safety warning component 50 further includes a support base 51 fixedly connected to the outlet end of the dam 11. A nozzle 52 is fixedly installed on the inner side wall of the support base 51. The two nozzles 52 are detachably connected through an adapter 53. The nozzles 52 are fixed by the support base 51, which can improve the stability of the nozzles 52. The two nozzles 52 are detachably connected through the adapter 53, which facilitates assembly. The adapter 53 is one of a snap-fit ​​connector and a threaded connector. The two ends of the nozzles 52 can be matched with the adapter 53 by threads or snap-fit.

[0058] The side wall of the nozzle 52 is provided with multiple air outlet holes 56. The safety warning component 50 also includes a high-pressure air pump 54 fixedly connected to the side wall of the dam 11. The air outlet of the high-pressure air pump 54 is fixedly connected to the nozzle 52 through a connecting pipe 55. The high-pressure air pump 54 delivers high-pressure gas into the connecting pipe and then into the nozzle, and is discharged through the air outlet holes 56 on the outer wall of the nozzle. As the air bubbles move upward, they form an isolation barrier, which can effectively block fish from swimming.

[0059] The inner wall of the fish zoning channel 60 is divided into a shallow rapid current channel and a deep pool slow current channel by a partition 61. A small fish barrier net 62 is installed in the shallow rapid current channel to allow small fish to pass through, and a large fish barrier net 63 is installed in the deep pool slow current channel to allow large fish to pass through. The setting of the large fish barrier net and the small fish barrier net allows large fish to enter other areas, effectively improving the survival rate of small fish.

[0060] Specifically, this diversion-type fixed-point fish crossing facility for improving migratory survival rates operates as follows: Upstream water flows into the water flow area through the regulating mechanism 20. When it is necessary to adjust the water flow, the electric push rod 24 can be activated. The extension and retraction of the electric push rod 24 drives the rotating rod 25 to push the baffle 23 to rotate, thereby adjusting the gap between the baffle 23 and the diversion pipe 22 to adjust the water flow. The discharged water flow forms a high-speed channel 13 and a low-speed channel 14 between the slow-stopping platform 30 and the guide block 40. The water flow changes direction after passing through the guide block 40. The water in the high-speed channel 13 mainly flows within the high-speed channel 13. Therefore, fish can choose the low-speed channel 14 to cross the dam, thereby reducing risks and improving the migratory survival rate. When fish are tired, they can enter the slow-stopping platform 30 to rest, avoiding fish fatigue. Excessive fatigue leads to death. At the same time, when fish accidentally enter the high-speed channel 13, they can easily change direction and enter the low-speed area in the vortex area formed by the vortex structure 15. The deceleration plate 17 is arranged in the low-speed channel 14, which can form a water jump phenomenon, thereby further reducing the water flow speed and blocking the fish from flowing downward. When the fish swim to the top, they jump into the fish partition channel 60. Small fish swim out through the small fish barrier 62 and enter the shallow rapid channel, while large fish swim out through the large fish barrier 63 and enter the deep pool slow channel. The high-pressure air pump 54 delivers high-pressure gas to the nozzle 52 through the connecting pipe 55. The gas is discharged through the air outlet 56 on the outer wall of the nozzle 52. The gas moves upward in the water to form a bubble barrier, thereby preventing the fish from directly hitting the dam. At the same time, an opening is formed at the migration channel position, allowing the fish to enter the migration channel.

[0061] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A diversion-type fixed-point fish crossing dam facility for improving the survival rate of migrating fish, characterized in that, The system includes a sloping flow channel (10), which is fixedly installed on one side of the dam (11). The sloping flow channel (10) has two water flow zones (12) flowing from high to low. A regulating mechanism (20) for adjusting the water flow velocity is installed at the top of the water flow zone (12). The system also includes: The slow-stop platform (30) is generally shaped like a raindrop and has a hollow interior to form a resting area. The side wall has a channel (31) for fish to swim. Multiple slow-stop platforms (30) are arranged in two groups at equal intervals in the water flow area (12). A flow guide block (40) is located between two stopping platforms (30). The flow guide block (40) has a straight surface (41) arranged parallel to the inner sidewall of the water flow zone (12) and an inclined surface (42) arranged parallel to the sidewall of the stopping platform (30). The slow-stop platform (30) and the guide block (40) together enclose the central area of ​​the water flow zone (12) to form a high-speed channel (13), and the slow-stop platform (30) and the guide block (40) together form a low-speed channel (14) on the side wall of the water flow zone (12). A vortex structure (15) is provided at the confluence and turning point of the high-speed channel (13). The vortex structure (15) is used to reduce the impact of the high-speed water flow and generate centrifugal force to help fish leave the high-speed channel (13). Safety warning components (50) are installed at the outlet of the dam (11) to form a virtual barrier to prevent fish from hitting the dam (11) and to guide fish into a suitable channel; Fish partition channel (60) is installed at the top of the inclined channel (10) and separated from the water flow area (12) by an isolation jump wall (16).

2. The diversion and fixed-point fish crossing dam facility for improving migratory survival rate according to claim 1, characterized in that, The control mechanism (20) includes a drain pipe (22) fixedly connected to the top of the water flow zone (12). A baffle (23) is rotatably connected to the inner wall of the drain pipe (22). The baffle (23) can be flipped relative to the drain pipe (22) to adjust the opening size of the drain pipe (22).

3. A diversion-type fixed-point fish crossing dam facility for improving migratory survival rate according to claim 2, characterized in that, The control mechanism (20) also includes an electric push rod (24) hinged to the outer wall of the drainage tube (22). One end of the electric push rod (24) is rotatably connected to a rotating rod (25), and one end of the rotating rod (25) is fixedly connected to the rotation axis of the baffle (23).

4. The diversion and fixed-point fish crossing dam facility for improving migratory survival rate according to claim 1, characterized in that, A speed-reducing plate (17) is fixedly installed on the inner wall of the low-speed channel (14). The inlet end of the speed-reducing plate (17) and the inclined flow channel (10) form an arc transition. When the water flow is in the arc transition area, a water jump is formed to reduce the water flow speed and form a barrier to prevent fish from being swept away.

5. A diversion-type fixed-point fish crossing dam facility for improving migratory survival rate according to claim 1, characterized in that, The swirling structure (15) is a plate structure formed by spiral winding, and the height of the middle position of the swirling structure (15) is greater than the height of the edge position.

6. A diversion-type fixed-point fish crossing dam facility for improving migratory survival rate according to claim 1, characterized in that, The safety warning component (50) includes a support base (51) fixedly connected to the outlet end of the dam (11). A nozzle (52) is fixedly installed on the inner side wall of the support base (51). The two nozzles (52) are detachably connected by an adapter (53).

7. A diversion-type fixed-point fish crossing dam facility for improving migratory survival rate according to claim 6, characterized in that, The nozzle (52) has multiple air outlet holes (56) on its side wall. The safety warning component (50) also includes a high-pressure air pump (54) fixedly connected to the side wall of the dam (11). The air outlet of the high-pressure air pump (54) is fixedly connected to the nozzle (52) through a connecting pipe (55).

8. A diversion-type fixed-point fish crossing dam facility for improving migratory survival rate according to claim 1, characterized in that, The inner wall of the fish zoning channel (60) is divided into a shallow rapid current channel and a deep pool slow current channel by a partition (61). The shallow rapid current channel is equipped with a small fish barrier net (62) for small fish to pass through, and the deep pool slow current channel is equipped with a large fish barrier net (63) for large fish to pass through.

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