Semi-buried dam passing structure and method of concrete gravity dam fish lifting machine

Abstract

The invention belongs to the technical field of dam fish passing devices, and discloses a concrete gravity dam fish lifting machine semi-buried dam passing structure and method.The concrete gravity dam fish lifting machine semi-buried dam passing structure comprises a dam body, a fish passing vertical shaft is formed in the dam body, a horizontal channel is formed in the side face of the fish passing vertical shaft, and guide rails are fixed to the inner side of the fish passing vertical shaft in an array mode; a horizontal channel is formed in the top face of the dam body, running steel rails are fixed to the bottom face of the horizontal channel, a fish transporting vehicle is arranged in the horizontal channel and movably connected with the running steel rails, a profile steel bent frame is arranged on the top face of the dam body, a dam top trolley is arranged on the top face of the profile steel bent frame, a fish transporting box is arranged at the bottom of the dam top trolley, and the fish transporting box is of an axial symmetry structure relative to the dam top trolley. The device further comprises a waterproof assembly which is arranged on the top face of the fish passing vertical shaft and used for preventing rainwater from flowing into the fish passing vertical shaft. And the conveying assembly is arranged between the profile steel bent frames and used for communicating the fish conveying boxes on the two sides of the dam body, and it is avoided that the fish conveying boxes move on the top face of the dam body to affect passing.

Description

Technical Field

[0001] This invention relates to the field of fish passage devices for dams, specifically to a semi-buried dam passage structure and method for a fish lifter in a concrete gravity dam. Background Technology

[0002] With the development and construction of water conservancy and hydropower projects in my country, natural river channels are being blocked by structures such as sluice gates and dams, fragmenting the habitats of fish and significantly impacting gene exchange. Therefore, during the construction of water conservancy and hydropower projects, construction personnel are actively seeking various engineering methods to mitigate the impact on fish. While there is considerable research and relatively mature technology regarding fish passage facilities in low-head water conservancy and hydropower projects such as sluice gates, the problem of fish passage in high-head dams continues to plague the entire water conservancy and hydropower engineering community. As a semi-mechanized fish passage facility, the fish lift can overcome the influence of the dam's head and height, requires less land, and has relatively low construction costs, making it a promising candidate for application in medium- and high dams, especially ultra-high dams.

[0003] The existing technology has the following problems: In conventional medium and high concrete gravity dams, the fish lift is a semi-buried structure, with almost all the main equipment exposed to the open air. This affects the overall landscape design of the dam and makes the equipment prone to corrosion and aging under wind, sun and rain, resulting in high maintenance and replacement costs. In addition, since most medium and high dams in my country are built in the western mountainous and canyon areas with high seismic intensity and prevailing valley winds, the safety of the structure itself is difficult to guarantee when the structure height or cantilever distance is large. Moreover, when the fish transport box moves horizontally at the top of the dam, the bottom of the steel frame cannot be used by vehicles or pedestrians, posing a significant safety hazard.

[0004] Therefore, a semi-buried dam-crossing structure and method for a fish lift in a concrete gravity dam is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the problem that almost all the main equipment is exposed to the elements, which affects the overall landscape design of the dam and makes the equipment prone to corrosion and aging under wind, sun, and rain, resulting in high maintenance and replacement costs. Furthermore, since most medium and high dams in my country are built in the western mountainous and canyon regions with high seismic intensity and prevailing valley winds, the safety of the structure itself is difficult to guarantee when the structural height or cantilever distance is large. Moreover, when the fish transport box moves horizontally at the top of the dam, the bottom of the steel frame cannot be used by vehicles or pedestrians, posing a significant safety hazard. This invention provides a semi-buried dam-crossing structure and method for a fish lift in a concrete gravity dam.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution: A semi-buried dam structure for a concrete gravity dam fish lift includes a dam body with a fish-passing shaft extending through the top surface of the dam body. A horizontal passage is provided on the side of the fish-passing shaft, also extending through the side of the dam body. Guide rails are fixedly arranged in an array on the inner side of the fish-passing shaft. Running rails are fixed to the bottom surface of the horizontal passage. A fish transport vehicle is located in the horizontal passage and is movably connected to the running rails. A steel frame is provided on the top surface of the dam body, and a dam top trolley is located on the top surface of the steel frame. A fish transport box is located at the bottom of the dam top parking area, and the fish transport box has an axisymmetric structure about the dam top trolley. The structure also includes a waterproof component located on the top surface of the fish-passing shaft to prevent rainwater from flowing into it. A conveying component is located between the steel frames to connect the fish transport boxes on both sides of the dam body, preventing the fish transport boxes from moving on the top surface of the dam body and affecting passage.

[0007] As a further embodiment of the present invention, the waterproof component includes a water-retaining sill, the top surface of which is provided with a first waterproof plate and a second waterproof plate, and the first waterproof plate and the second waterproof plate are respectively movably connected to the water-retaining sill, and the top and bottom surfaces of the first waterproof plate and the second waterproof plate are respectively fixed with activation sensors.

[0008] As a further embodiment of the present invention, the top surface of the water-retaining sill is provided with guide grooves, the bottom surfaces of the first waterproof plate and the second waterproof plate are respectively fixed with guide blocks, and the guide blocks are respectively movably connected to the guide grooves. The guide grooves are respectively provided with bidirectional screw rods, and the bidirectional screw rods are respectively threadedly connected to the guide blocks. One end of the bidirectional screw rods is respectively fixed with an adjusting motor.

[0009] As a further embodiment of the present invention, the conveying assembly includes a connecting frame, which is fixed to the inner side of the steel frame. A gear rack is fixed to the top surface of the connecting frame, and a limiting groove is formed on the top surface of the connecting frame.

[0010] As a further embodiment of the present invention, the top surface of the connecting frame is provided with a support plate, the bottom surface of the support plate is fixed with a limit strip, and the limit strip is movably connected to the limit groove. A moving motor is fixed inside the support plate, and the output end of the moving motor passes through the side of the support plate. A transmission gear is fixed to the output end of the moving motor, and the transmission gear meshes with the gear rack.

[0011] As a further embodiment of the present invention, a connecting bracket is fixed on the bottom surface of the support plate, a conveying fence is provided on the side of the connecting bracket, and the conveying fence is movably connected to the connecting bracket. A rotary motor is fixed inside the connecting bracket, and the output end of the rotary motor is fixedly connected to the conveying fence.

[0012] As a further embodiment of the present invention, the fish transport box has an overflow groove on its side, an inclined seat is provided inside the fish transport box and is movably connected to the fish transport box, a lifting motor is fixed inside the fish transport box, a lifting screw is fixed at the output end of the lifting motor and is threadedly connected to the inclined seat, a hoisting bracket is fixed on the top surface of the fish transport box, and guide wheels are arrayed on the side of the hoisting bracket and are movably connected to the guide rail.

[0013] A method for a semi-buried fish lift structure for a concrete gravity dam to pass through the dam includes the following steps: Sp1: After the fish transport box placed on the fish transport vehicle is filled with fish that need to be transported across the dam, the fish transport vehicle will move the fish transport box directly below the fish passage shaft along the running rail in the horizontal channel. Sp2: Then, under the lifting of the trolley on the top of the dam, the fish box will move upward along the fish passage shaft to one end of the conveying component, while there is also a fish box at the other end of the conveying component; Sp3: Then the ramp seat in the fish transport box will move upward, and the water and fish in the fish transport box will enter the connecting frame through the overflow channel. Then the conveying fence in the conveying assembly will move in the connecting frame, driving the fish in the conveying frame towards the upstream fish transport box. Sp4: After all the fish in the transport frame enter the upstream fish transport box, the inclined seat in the upstream fish transport box will continue to move downwards, absorbing all the water in the connecting frame. Sp5: Finally, the downstream fish transport boxes will be lowered into the fish transfer shaft for the next fish transfer, while the upstream fish transport boxes will be lowered into the upstream reservoir for fish release.

[0014] The beneficial effects of this invention are as follows: 1. The present invention incorporates a waterproof component in its structure, which is located at the top of the fish passage shaft. When the fish transport box is inside the fish passage shaft, the waterproof component blocks the top of the shaft. When the fish transport box moves to the top of the shaft, the waterproof component automatically opens. This design not only facilitates the entry and exit of the fish transport box from the fish passage shaft but also effectively prevents the equipment inside the shaft from being exposed to wind, sun, and rain, thereby improving the service life of the fish lift equipment and reducing maintenance costs.

[0015] 2. The present invention includes a conveying component in its structure, which is set inside the trolley on the top of the dam to connect the upstream and downstream fish transport boxes. The fish in the downstream fish transport box are then driven to the upstream fish transport box through the conveying component. Fish can be transported from downstream to upstream without horizontally moving the fish transport boxes. This design not only allows vehicles to pass through and move continuously at the bottom of the steel frame, improving the safety of the structure, but also improves the efficiency of fish passage. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an overall sectional view of the present invention; Figure 3 This is an exploded view of the overall structure of the present invention; Figure 4 This is a schematic diagram of the fish transport box of the present invention; Figure 5 This is a cross-sectional view of the fish transport box of the present invention; Figure 6 This is an exploded view of the fish transport box of the present invention; Figure 7 This is a schematic diagram of the structure of the waterproof component of the present invention; Figure 8 This is a cross-sectional view of the waterproof component of the present invention; Figure 9 This is an exploded view of the waterproof component of the present invention; Figure 10 This is a schematic diagram of the structure of the conveying component of the present invention; Figure 11 This is a cross-sectional view of the delivery assembly of this invention; Figure 12 This is an exploded view of the conveying component of the present invention.

[0016] Reference numerals: 1. Waterproof component; 101. First waterproof membrane; 102. Start-up sensor; 103. Water-retaining sill; 104. Second waterproof membrane; 105. Guide block; 106. Bidirectional lead screw; 107. Adjusting motor; 108. Guide groove; 2. Conveying component; 201. Connecting frame; 202. Gear rack; 203. Transmission gear; 204. Support plate; 205. Limiting groove; 206. Conveying fence; 207. Connecting bracket; 208. Moving motor; 209. Rotating motor; 210. Limiting strip; 3. Dam top trolley; 4. Dam body; 5. Horizontal passage; 6. Running rail; 7. Fish passage shaft; 8. Guide rail; 9. Fish transport vehicle; 10. Lifting lead screw; 11. Fish transport box; 12. Steel frame; 13. Lifting bracket; 14. Overflow trough; 15. Guide wheel; 16. Inclined seat; 17. Lifting motor. Detailed Implementation

[0017] 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] It should be noted that similar reference numerals 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. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", 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 in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present 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. Therefore, they should not be construed as limiting the present invention.

[0021] The following will combine Figures 1-12 This invention provides a detailed description of a semi-buried dam passage structure and method for a fish lift in a concrete gravity dam, according to an embodiment of the present invention.

[0022] Example 1: Embodiment 1 of this application discloses a semi-buried dam passage structure for a fish lift in a concrete gravity dam. (Reference) Figures 1-12 The structure includes a dam body (4), a fish passage shaft (7) is provided inside the dam body (4), and the fish passage shaft (7) penetrates the top surface of the dam body (4). A horizontal passage (5) is provided on the side of the fish passage shaft (7), and the horizontal passage (5) penetrates the side of the dam body (4). A guide rail (8) is fixedly arranged on the inner side of the fish passage shaft (7). A running rail (6) is fixed on the bottom surface of the horizontal passage (5). A fish transport vehicle (9) is provided in the horizontal passage (5), and the fish transport vehicle (9) is movably connected to the running rail (6). A steel frame (12) is provided on the top surface of the dam body (4). The top surface of the steel frame (12) is provided with a dam top trolley (3), and the bottom of the dam top parking area is provided with a fish transport box (11), and the fish transport box (11) is axially symmetrical about the dam top trolley (3); it also includes: a waterproof component (1), which is set on the top surface of the fish passage shaft (7) to prevent rainwater from flowing into the fish passage shaft (7); and a conveying component (2), which is set between the steel frame (12) to connect the fish transport boxes (11) on both sides of the dam body (4) to prevent the fish transport boxes (11) from moving on the top surface of the dam body (4) and affecting passage; Specifically, the waterproof component (1) is set at the top of the fish passage shaft (7). When the fish transport box (11) is inside the fish passage shaft (7), the waterproof component (1) will block the top of the fish passage shaft (7). When the fish transport box (11) moves out to the top of the fish passage shaft (7), the waterproof component (1) can open automatically. This design not only facilitates the fish transport box (11) to enter and exit the fish passage shaft (7), but also effectively prevents the equipment inside the fish passage shaft (7) from being exposed to wind, sun and rain, thus improving the service life of the fish lift equipment and reducing maintenance costs. The waterproof component (1) includes a water-blocking sill (103). The top surface of the water-blocking sill (103) is provided with a first waterproof plate (101) and a second waterproof plate (104), and the first waterproof plate (101) and the second waterproof plate (104) are movably connected to the water-blocking sill (103). The top and bottom surfaces of the first waterproof plate (101) and the second waterproof plate (104) are respectively fixed with a start sensor (102). The top surface of the water-blocking sill (103) is provided with a guide groove (108). The bottom surfaces of the first waterproof plate (101) and the second waterproof plate (104) are respectively fixed with a guide block (105), and the guide block (105) is movably connected to the guide groove (108). The guide groove (108) is provided with a bidirectional screw rod (106), and the bidirectional screw rod (106) is threadedly connected to the guide block (105). One end of the bidirectional screw rod (106) is fixed with an adjusting motor (107). Specifically, in the waterproof component (1), when the fish box (11) is about to contact the top or bottom surface of the waterproof component (1) under the hoisting of the dam top trolley (3), the start sensor (102) will sense it, and then under the drive of the adjusting motor (107), the bidirectional lead screw (106) will rotate in the guide groove (108), so that the guide block (105) on the bottom surface of the first waterproof plate (101) and the second waterproof plate (104) will move along the guide groove (108), thereby realizing the equal spacing adjustment of the first waterproof plate (101) and the second waterproof plate (104).

[0023] The implementation principle of the semi-buried dam-crossing structure of the fish lifter in the first embodiment of this application is as follows: In the waterproof component (1), when the fish box (11) is about to contact the top or bottom surface of the waterproof component (1) under the hoisting of the dam top trolley (3), the activation sensor (102) will sense it, and then under the drive of the regulating motor (107), the bidirectional lead screw (106) will rotate in the guide groove (108), so that the guide block (105) on the bottom surface of the first waterproof plate (101) and the second waterproof plate (104) will move along the guide groove (108), realizing the first waterproof plate (101) 101) and the equal spacing adjustment of the second waterproof plate (104); the waterproof component (1) is set at the top of the fish passage shaft (7). When the fish transport box (11) is located in the fish passage shaft (7), the waterproof component (1) will block the top of the fish passage shaft (7). When the fish transport box (11) moves out to the top of the fish passage shaft (7), the waterproof component (1) can open automatically. This design not only facilitates the fish transport box (11) to enter and exit the fish passage shaft (7), but also effectively prevents the equipment in the fish passage shaft (7) from being exposed to wind, sun and rain, improves the service life of the fish lift equipment, and reduces maintenance costs.

[0024] Example 2: refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 10 , Figure 11 and Figure 12 The conveying assembly (2) includes a connecting frame (201), which is fixed to the inner side of the steel frame (12). A gear rack (202) is fixed to the top surface of the connecting frame (201), and a limiting groove (205) is formed on the top surface of the connecting frame (201). A support plate (204) is provided on the top surface of the connecting frame (201), and a limiting strip (210) is fixed to the bottom surface of the support plate (204). The limiting strip (210) is movably connected to the limiting groove (205). A moving motor (208) is fixed inside the support plate (204), and the moving motor ( The output end of the moving motor (208) passes through the side of the support plate (204). The output end of the moving motor (208) is fixed with a transmission gear (203), and the transmission gear (203) meshes with the gear rack (202). The bottom surface of the support plate (204) is fixed with a connecting bracket (207). The side of the connecting bracket (207) is provided with a conveying fence (206), and the conveying fence (206) is movably connected to the connecting bracket (207). The connecting bracket (207) is fixed with a rotary motor (209), and the output end of the rotary motor (209) is fixedly connected to the conveying fence (206). Specifically, in the conveying assembly (2), after the two ends of the connecting frame (201) are connected to the overflow trough (14) on the side of the fish transport box (11), the water and fish in the downstream fish transport box (11) will enter the connecting frame (201). At this time, under the drive of the rotary motor (209), the conveying fence (206) will rotate to a position perpendicular to the connecting frame (201). Then, under the drive of the moving motor (208), the transmission gear (203) meshes with the gear rack (202) and rotates, so that the conveying fence (206) moves horizontally in the connecting frame (201) and drives the fish in the water to the upstream fish transport box (11). The fish transport box (11) has an overflow groove (14) on its side. The fish transport box (11) has an inclined seat (16) inside, and the inclined seat (16) is movably connected to the fish transport box (11). The fish transport box (11) has a fixed lifting motor (17) inside. The output end of the lifting motor (17) is fixed with a lifting screw (10), and the lifting screw (10) is threadedly connected to the inclined seat (16). The top surface of the fish transport box (11) has a fixed hoisting bracket (13). The side of the hoisting bracket (13) is provided with guide wheels (15), and the guide wheels (15) are movably connected to the guide rail (8). Specifically, driven by the lifting motor (17), the inclined seat (16) will move upward in the fish transport box (11) to push the water and fish in the fish transport box (11) out of the overflow trough (14), which facilitates the transfer of fish. The design of the guide wheel (15) and the guide rail (8) makes the fish transport box (11) more stable when moving in the fish passage shaft (7).

[0025] The implementation principle of the semi-buried dam-crossing structure of the concrete gravity dam fish lifter in Embodiment 2 of this application is as follows: In the conveying component (2), after the two ends of the connecting frame (201) are connected to the overflow trough (14) on the side of the fish transport box (11), the water and fish in the downstream fish transport box (11) will enter the connecting frame (201). At this time, under the drive of the rotary motor (209), the conveying fence (206) will rotate to a position perpendicular to the connecting frame (201). Then, under the drive of the moving motor (208), the transmission gear (203) meshes with the gear rack (202) and rotates, so that the conveying fence (206) moves horizontally in the connecting frame (201), lifting the fish in the water. The fish are driven to the upstream fish transport box (11). Driven by the lifting motor (17), the inclined seat (16) will move upward in the fish transport box (11) to push the water and fish in the fish transport box (11) out of the overflow channel (14), which facilitates the transfer of fish. The design of the guide wheel (15) and the guide rail (8) makes the fish transport box (11) more stable when moving in the fish passage shaft (7). The conveying component (2) is set in the trolley (3) on the top of the dam to realize the connection between the upstream and downstream fish transport boxes (11). The fish can be transported from the downstream to the upstream without moving the fish transport box (11) horizontally. This design allows the bottom of the steel frame (12) to be continuously open to traffic and travel, which improves the safety of the structure.

[0026] Example 3: Sp1: After the fish transport box (11) placed on the fish transport vehicle (9) is filled with fish that need to cross the dam, the fish transport vehicle (9) will move the fish transport box (11) along the running rail (6) in the horizontal channel (5) directly below the fish crossing shaft (7); Sp2: Then, under the lifting of the dam top trolley (3), the fish box (11) will move upward along the fish passage shaft (7) to one end of the conveying assembly (2), while there is also a fish box (11) at the other end of the conveying assembly (2). Sp3: Then the inclined seat (16) in the fish transport box (11) will move upward, and the water and fish in the fish transport box (11) will enter the connecting frame (201) through the overflow channel (14). Then the conveying fence (206) in the conveying assembly (2) will move in the connecting frame (201) to drive the fish in the conveying frame to the upstream fish transport box (11). Sp4: When all the fish in the transport frame enter the upstream fish transport box (11), the inclined seat (16) in the upstream fish transport box (11) will continue to move downwards, absorbing all the water in the connecting frame (201). Sp5: Finally, the downstream fish transport box (11) will descend into the fish transfer shaft (7) for the next fish transfer, while the upstream fish transport box (11) will descend into the upstream reservoir for fish release.

[0027] In summary: The horizontal channel (5) is arranged inside the concrete gravity dam body (4), and extends horizontally from the rear of the dam to the interior of the dam body (4), and then connects to the fish shaft (7). The channel is equipped with running rails (6), which allow the fish transport vehicle (9) to travel in both directions and accurately transport the fish box (11) to the bottom of the fish shaft. The cross-sectional dimensions of the horizontal channel (5) of the fish lifter are mainly determined by the combined dimensions of the running rails (6), the fish transport vehicle (9), and the fish box (11).

[0028] The fish passage shaft (7) is located inside the dam body (4). The bottom is connected to the end of the horizontal channel (5) of the fish lifter, and the upper part is directly connected to the top of the dam. When the fish transport vehicle (9) stops at the bottom of the fish passage shaft (7), the fish transport box (11) is lifted to the top of the dam by the trolley (3) on the top of the dam. The fish passage shaft (7) is equipped with guide rails (8) around the well wall to prevent the fish transport box (11) from swinging and colliding during hoisting, and to ensure the stability of the fish transport box (11). In order to prevent rainwater from the top of the dam from entering the fish passage shaft (7), a 20cm high and 20cm thick water retaining sill (103) is set around the top, and a cover plate that can be automatically closed and opened is set. It is opened when running and closed when not in use.

[0029] The semi-buried dam passage structure of the medium and high concrete gravity dam fish lifter of the present invention has the main access channels to the dam as the horizontal fish lifter horizontal passage (5) and the vertical fish passage shaft (7), both of which are reinforced concrete structures. The amount of steel reinforcement is partially compensated by reducing the amount of concrete, without significantly increasing other facility structures, and the construction cost is low. Since its main structure is arranged inside the dam body (4), and a water retaining sill (103) and cover plate are set on its top, the effects of wind, sun and rain can be effectively avoided, the service life of the fish lifter equipment can be improved, and the maintenance cost can be reduced. At the same time, with the advantage of the large size and high strength of the concrete gravity dam body (4), it can resist the impact of earthquakes. The dam top trolley (3) has a small height and cantilever length, which effectively improves the safety of the dam passage structure itself. In addition, since the dam passage structure has no large structures protruding from the outside of the dam body (4), it will not have a major impact on the overall landscape of the dam.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A semi-buried dam structure for a concrete gravity dam fish lifter, comprising a dam body (4), wherein a fish lift shaft (7) is provided inside the dam body (4), and the fish lift shaft (7) penetrates the top surface of the dam body (4), a horizontal channel (5) is provided on the side of the fish lift shaft (7), and the horizontal channel (5) penetrates the side of the dam body (4), a guide rail (8) is fixedly arranged on the inner side of the fish lift shaft (7), a running rail (6) is fixed on the bottom surface of the horizontal channel (5), a fish transport vehicle (9) is provided in the horizontal channel (5), and the fish transport vehicle (9) is movably connected to the running rail (6), a steel frame (12) is provided on the top surface of the dam body (4), a dam top trolley (3) is provided on the top surface of the steel frame (12), a fish transport box (11) is provided at the bottom of the dam top parking area, and the fish transport box (11) is axially symmetrical about the dam top trolley (3); Its features are, Also includes: Waterproof component (1), which is disposed on the top surface of the fish passage shaft (7) to prevent rainwater from flowing into the fish passage shaft (7); The conveying component (2) is set between the steel frame (12) to connect the fish transport boxes (11) on both sides of the dam body (4) to prevent the fish transport boxes (11) from moving on the top surface of the dam body (4) and affecting passage.

2. The semi-buried dam passage structure for a fish lift in a concrete gravity dam according to claim 1, characterized in that: The waterproof component (1) includes a water-blocking sill (103). The top surface of the water-blocking sill (103) is provided with a first waterproof plate (101) and a second waterproof plate (104). The first waterproof plate (101) and the second waterproof plate (104) are movably connected to the water-blocking sill (103). The top and bottom surfaces of the first waterproof plate (101) and the second waterproof plate (104) are respectively fixed with a start sensor (102).

3. The semi-buried dam passage structure for a fish lift in a concrete gravity dam according to claim 2, characterized in that: The top surface of the water-blocking sill (103) is provided with guide grooves (108), the bottom surfaces of the first waterproof plate (101) and the second waterproof plate (104) are respectively fixed with guide blocks (105), and the guide blocks (105) are respectively movably connected to the guide grooves (108). The guide grooves (108) are respectively provided with bidirectional screw rods (106), and the bidirectional screw rods (106) are respectively threadedly connected to the guide blocks (105). One end of the bidirectional screw rods (106) is respectively fixed with an adjusting motor (107).

4. The semi-buried dam passage structure for a fish lift in a concrete gravity dam according to claim 1, characterized in that: The conveying assembly (2) includes a connecting frame (201), and the connecting frame (201) is fixed inside the steel frame (12). A gear rack (202) is fixed on the top surface of the connecting frame (201), and a limit groove (205) is opened on the top surface of the connecting frame (201).

5. The semi-buried dam passage structure for a fish lift in a concrete gravity dam according to claim 4, characterized in that: The top surface of the connecting frame (201) is provided with a support plate (204). The bottom surface of the support plate (204) is fixed with a limiting strip (210), and the limiting strip (210) is movably connected to the limiting groove (205). A moving motor (208) is fixed inside the support plate (204), and the output end of the moving motor (208) passes through the side of the support plate (204). A transmission gear (203) is fixed at the output end of the moving motor (208), and the transmission gear (203) meshes with the gear rack (202).

6. The semi-buried dam passage structure for a fish lift in a concrete gravity dam according to claim 5, characterized in that: The bottom surface of the support plate (204) is fixed with a connecting bracket (207). The side of the connecting bracket (207) is provided with a conveying fence (206), and the conveying fence (206) is movably connected to the connecting bracket (207). A rotary motor (209) is fixed inside the connecting bracket (207), and the output end of the rotary motor (209) is fixedly connected to the conveying fence (206).

7. The semi-buried dam passage structure for a fish lift in a concrete gravity dam according to claim 1, characterized in that: The fish transport box (11) has an overflow groove (14) on its side. The fish transport box (11) has an inclined seat (16) inside, and the inclined seat (16) is movably connected to the fish transport box (11). The fish transport box (11) has a fixed lifting motor (17) inside. The output end of the lifting motor (17) is fixed with a lifting screw (10), and the lifting screw (10) is threadedly connected to the inclined seat (16). The top surface of the fish transport box (11) has a fixed hoisting bracket (13). The side of the hoisting bracket (13) is provided with guide wheels (15), and the guide wheels (15) are movably connected to the guide rail (8).

8. A method for crossing a concrete gravity dam with a semi-buried fish lift structure, characterized in that... Includes the following steps: Sp1: After the fish transport box (11) placed on the fish transport vehicle (9) is filled with fish that need to cross the dam, the fish transport vehicle (9) will move the fish transport box (11) along the running rail (6) in the horizontal channel (5) directly below the fish crossing shaft (7); Sp2: Then, under the lifting of the dam top trolley (3), the fish box (11) will move upward along the fish passage shaft (7) to one end of the conveying assembly (2), while there is also a fish box (11) at the other end of the conveying assembly (2). Sp3: Then the inclined seat (16) in the fish transport box (11) will move upward, and the water and fish in the fish transport box (11) will enter the connecting frame (201) through the overflow channel (14). Then the conveying fence (206) in the conveying assembly (2) will move in the connecting frame (201) to drive the fish in the conveying frame to the upstream fish transport box (11). Sp4: When all the fish in the transport frame enter the upstream fish transport box (11), the inclined seat (16) in the upstream fish transport box (11) will continue to move downwards, absorbing all the water in the connecting frame (201). Sp5: Finally, the downstream fish transport box (11) will descend into the fish transfer shaft (7) for the next fish transfer, while the upstream fish transport box (11) will descend into the upstream reservoir for fish release.

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