Fishway inlet fish luring device

Abstract

The fishway inlet fish luring device comprises two wing walls which are fixedly arranged in a river channel and used for forming a fishway, a fixing plate is arranged at the fishway inlet of the two wing walls, a frame is fixed to one wing wall, a plurality of rotating columns are rotationally connected to the inner side of the frame, front plates are arranged outside the rotating columns, and inner shafts are rotationally connected to the interiors of the rotating columns; pressing plates are fixed to the two sides of the inner shaft, a plurality of sets of open holes are formed in the inner side of the rotating column, a plurality of sets of sliding columns matched with the open holes are fixed to the two sides of the pressing plates, and second springs are further arranged on the portions, between the open holes and the pressing plates, of the outer sides of the sliding columns in a sleeving mode. A first rack is slidably connected to the top of the frame, and insections meshed with the first rack are arranged at the top end of the outer side of the inner shaft. An extrusion cylinder is arranged on the side, close to the frame, of the fixing plate, a first spring is arranged in the extrusion cylinder, the interior of the extrusion cylinder communicates with one end of a pipeline, and one end of a first rack is in sliding fit with the inner wall of the other end of the pipeline through a piston; the invention provides a water flow velocity in a stable interval for the fishway inlet.

Description

Technical Field

[0001] The invention relates to the field of water conservancy engineering, in particular to a fish attracting device at the entrance of a fishway. Background Art

[0002] With the continuous construction of water conservancy projects, especially the increase of large-scale water conservancy facilities such as river damming, the continuity of rivers has been seriously damaged, which has had a significant impact on the fish population in the river ecosystem. Fish migration is an indispensable part of the natural ecological cycle, and the construction of dams blocks their migration path, affecting their reproduction and survival. In order to alleviate this problem, fishways have emerged as an engineering measure to assist fish in crossing dams.

[0003] In the existing technology, various measures such as water flow, light, sound, bubble curtain, smell, electric field, etc. are used at the fishway entrance to attract or drive migratory fish into the fishway entrance to complete their upstream migration. The widespread application of these technologies has greatly improved the fish passing efficiency of fish passing facilities and reduced the damage to fish in the overflow dam area.

[0004] The flow rate of water at the entrance of the fishway will also affect the migration of fish. If the water flow is too fast, the fish will consume a lot of physical energy during the migration process, and may even be exhausted and unable to continue migrating. Especially for smaller fish with weaker swimming ability, too fast water flow may become an obstacle to their migration, affecting the migration efficiency of fish and even causing them to miss the best time to spawn or forage. If the water flow is too slow, the fish may be in a low flow state for a long time, thereby increasing their physiological stress. Slow water flow may also make the fish unable to perceive the correct migration direction or speed, causing them to hesitate or choose the wrong path.

[0005] However, the water flow at the inlet of the existing fishway is mostly consistent with the water flow in the river. The water flow in the river is unstable. When it rains, the water volume increases and the water flow rate becomes faster. When it is dry, the water flow rate becomes slower. A stable water flow rate helps fish form a regular migratory behavior pattern. Therefore, providing a stable water flow rate for the fishway is an urgent problem that needs to be solved. Summary of the invention

[0006] The object of the present invention is to overcome the above-mentioned shortcomings and provide a fish attracting device at the inlet of a fishway to solve the technical problem of unstable flow velocity of water flow at the inlet of the existing fishway.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a fish-attracting device for fishway entrance, comprising two wing walls fixed in a river channel for forming a fishway, fixed plates are arranged at the fishway entrances of the two wing walls, a frame is fixed at one of the wing walls, a plurality of rotating columns are rotatably connected to the inner side of the frame, a front plate is arranged outside the rotating column, an inner shaft is rotatably connected to the inner side of the rotating column, pressing plates are fixed on both sides of the inner shaft, a cavity for the pressing plate to move is arranged inside the rotating column, a plurality of groups of openings are arranged inside the rotating column, a plurality of groups of sliding columns matching with the openings are fixed on both sides of the pressing plate, and a second spring is sleeved on the outer side of the sliding column between the opening and the pressing plate, a first rack is slidably connected to the top of the frame, a tooth pattern meshing with the first rack is arranged on the outer top of the inner shaft, an extrusion cylinder is arranged on the side of the fixed plate close to the frame, a first spring is arranged inside the extrusion cylinder, the interior of the extrusion cylinder is connected with one end of a pipeline, and one end of the first rack is slidably matched with the inner wall of the other end of the pipeline through a piston.

[0008] Preferably, the inner shaft is designed as a hollow structure, a water pipe is connected to the bottom of the inner shaft through an adapter, and the other end of the water pipe extends to an upstream position, a row of first water holes is arranged on the outside of the inner shaft, and a row of second water holes cooperating with the first water holes is arranged on the outside of the rotating column.

[0009] Preferably, the back surface of the front plate is slidably connected to a rear plate, and a second rack is arranged on the top of the rear plate, and a tooth pattern meshing with the second rack is also arranged on the top of the outer side of the inner shaft.

[0010] More preferably, the front plate and the rear plate are both provided with water holes that cooperate with each other.

[0011] Preferably, a limiting column is arranged on the top of the rotating column, and a limiting groove cooperating with the limiting column is arranged on the top frame.

[0012] Preferably, a fish attracting light is installed at the entrance of the fishway, which is located on the inner side of the wing wall.

[0013] Preferably, a mounting block is fixed on the top of the frame, the first rack movably passes through the mounting block, and the first rack is limited by the mounting block.

[0014] Preferably, both ends of the inner shaft movably pass through the frame.

[0015] Preferably, two groups of air ducts connected to the openings are further provided inside the protruding position on the inner side of the rotating column, the bottom of the air duct is piston-connected to a piston column, and the bottom of the piston column is connected to an insert block, the bottom of the rotating column is provided with an opening for the insert block to be extended and retracted, and the bottom of the frame is provided with a socket that cooperates with the insert block.

[0016] In addition, the present invention also discloses a fish attracting method of a fishway inlet fish attracting device, comprising the following steps: When the water flow in the river increases, the water flow will impact the extrusion cylinder and compress the first spring. The gas in the extrusion cylinder is compressed into the inside of the pipeline for transmission, so that the gas squeezes one end of the first rack. Since one end of the first rack is connected to the inside of one end of the pipeline in a piston-like manner, it will push the first rack to translate. The first rack uses the tooth pattern to drive the inner shaft to rotate. At this time, there is air pressure in the opening, and the inner shaft will drive the rotating column to rotate together through the pressure plate and the sliding column. The rotating column drives the front plate to flip, so that the gap between the multiple groups of front plates becomes smaller, thereby reducing the flow of water at the entrance of the fishway. At this time, the multiple groups of front plates will form a wall, which can resist the water flow to slow down the flow rate of water. At this time, the opening at the bottom of a group of rotating columns corresponds to a group of plug holes on the bottom frame. When the inner shaft continues to rotate, it will drive a group of sliding columns to be compressed into the opening. The sliding column squeezes the gas inside the opening, and then squeezes the gas in the airway, so that the gas in the airway squeezes the piston column, so that the plug is inserted into the plug hole through the opening. At this time, the rotating column is stuck and will not continue to rotate, ensuring that the front plate does not rotate excessively; When the water flow in the river decreases, the first spring overcomes the water pressure and drives the extrusion cylinder to reset, thereby producing an air suction effect. Negative pressure is also generated inside the pipe to pull the first rack back, thereby producing a movement opposite to the above movement. When the inner shaft initially rotates, it drives the above-mentioned group of sliding columns to extend out of the opening, thereby generating negative pressure in the opening and the airway, and sucking back the above-mentioned group of piston columns and plug blocks. In this way, the inner shaft can continue to drive the rotating column to reverse, so that the rotating column drives the front plate to gradually reverse and open until it is fully opened, so as to ensure the normal flow of water at the fishway entrance. At this time, another group of piston columns and plug blocks are inserted into another group of jacks using the same principle to limit the rotation of the rotating column.

[0017] Beneficial effects of the present invention: the present invention sets an adjustment structure composed of components such as a frame, a rotating column, a front plate, a rear plate and an extrusion cylinder at the entrance of the fishway. When the water flow is large, it can drive multiple groups of front and rear plates to flip, so that the multiple groups of front and rear plates flip into one surface, thereby resisting the water flow to slow down the water flow rate. If the water flow is too large, the rear plate continues to slide, so that the water holes between the rear plate and the front plate are staggered, thereby further resisting the water flow. When the water flow becomes smaller, each component is reset, so that the multiple groups of front and rear plates are opened to each other, ensuring the smooth passage of water, and the upstream water pressure can also be used to supplement the water flow at the water inlet of the fishway; the present invention can use the pressure of the water flow to control the flipping of the front and rear plates, and then control the water flow rate at the entrance of the fishway, providing a stable range of water flow rate for the fishway entrance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the extrusion cylinder of the present invention; Figure 3It is a schematic diagram of the matching structure of the frame and the front plate of the present invention; Figure 4 For the present invention Figure 3 Another perspective of the picture; Figure 5 It is a schematic diagram of the matching structure of the rotating column and the front plate of the present invention; Figure 6 For the present invention Figure 3 A cross-sectional view of Figure 7 It is a structural schematic diagram of the rotating column of the present invention; Figure 8 It is a schematic diagram of the structure inside the rotating column of the present invention; Fig. 9 It is a structural schematic diagram of the bottom of the rotating column of the present invention; Fig.10 It is a schematic diagram of the matching structure of the rotating column and the inner shaft of the present invention; Fig.11 It is a cross-sectional view of the rotating column and the inner shaft of the present invention; Fig.12 It is a structural schematic diagram of the inner shaft of the present invention; Fig.13 It is a structural schematic diagram of the top of the frame of the present invention; Fig.14 It is a structural schematic diagram of the bottom of the frame of the present invention; Fig.15 It is a schematic diagram of the water flow direction and the fish migration direction of the present invention; In the figure: 1. wing wall; 2. frame; 3. fixing plate; 4. extrusion cylinder; 5. pipeline; 6. first spring; 7. rotating column; 8. front plate; 9. inner shaft; 10. mounting block; 11. first rack; 12. rear plate; 13. second rack; 14. pressure plate; 15. opening; 16. sliding column; 17. second spring; 18. airway; 19. piston column; 20. plug-in block; 21. opening; 22. water pipe; 23. plug-in hole; 24. first water hole; 25. second water hole; 26. limiting groove; 27. limiting column; 28. fish collecting lamp. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] like Figure 1 As shown: a fish-attracting device at the entrance of a fishway, comprising a fixing plate 3 and two wing walls 1. A fishway is formed by the two wing walls 1. A fish-attracting lamp 28 is installed on the inner side of the wing wall 1 at the entrance of the fishway. The fish-attracting lamp 28 is used to induce fish to the entrance of the fishway.

[0021] like Figure 1-15As shown, a frame 2 is fixed on a wing wall 1 at the entrance of the fishway, and the frame 2 is located at the inner wing wall and is cut obliquely. A plurality of rotating columns 7 are rotatably connected to the inner side of the frame 2, and a plurality of front plates 8 are rotatably connected to the plurality of rotating columns 7. An inner shaft 9 is rotatably connected to the inner side of the rotating column 7. Both ends of the inner shaft 9 can move through the frame 2. Pressure plates 14 are fixed on both sides of the inner shaft 9. A cavity for the pressure plate 14 to move is provided inside the rotating column 7. A plurality of groups of openings 15 are provided inside the protruding portion on the inner side of the rotating column 7. A plurality of groups of sliding columns 16 cooperating with the openings 15 are fixed on both sides of the pressure plate 14. A second spring 17 is also sleeved on the outer side of the sliding column 16 between the openings 15 and the pressure plate 14. An airway 18 connected to the opening 15 is also provided inside the protruding portion on the inner side of the rotating column 7. The bottom of 18 is piston-connected with a piston column 19, and the bottom of the piston column 19 is connected to an insert block 20. The bottom of the rotating column 7 is provided with an opening 21 for the insert block 20 to be extended and retracted. The bottom frame 2 is provided with a socket 23 that cooperates with the insert block 20. The top frame 2 is slidably connected with a first rack 11. A mounting block 10 is fixed to the top of the frame 2. The first rack 11 moves through the mounting block 10, and the first rack 11 is limited by the mounting block 10. The top outer side of the inner shaft 9 is provided with a tooth pattern that meshes with the first rack 11. The fixed plate 3 is located on one side of the frame 2 and is provided with an extrusion cylinder 4. The interior of the extrusion cylinder 4 is provided with a first spring 6. The extrusion cylinder 4 is connected to a pipe 5, and one end of the first rack 11 is connected to the interior of one end of the pipe 5 in a piston-like manner.

[0022] When the water flow in the river increases, the water flow will impact the extrusion cylinder 4 and compress the first spring 6. In this embodiment, Figure 2 As shown, the extrusion cylinder 4 includes an outer cylinder and an inner cylinder (one end is closed) that slides with the inner side of the outer cylinder, and a first spring 6 is arranged between the inner cylinder and the end of the outer cylinder. When the water flow impacts the inner cylinder, it will drive the inner cylinder to slide in the outer cylinder, producing an effect similar to squeezing or compressing gas; the gas in the extrusion cylinder 4 is compressed to the inside of the pipe 5 for transmission, so that the gas squeezes one end of the first rack 11. Since one end of the first rack 11 is connected to the inside of one end of the pipe 5 in a piston-like manner, it will push the first rack 11 to translate. The first rack 11 drives the inner shaft 9 to rotate by the tooth pattern. At this time, there is air pressure in the opening 15, and the inner shaft 9 will drive the rotating column 7 to rotate together through the pressure plate 14 and the sliding column 16. The rotating column 7 drives the front plate 8 to flip, so that the gap between the multiple groups of front plates 8 becomes smaller, thereby reducing the flow of water at the fishway entrance until the front plate 8 rotates to Figure 1 , Figure 3 as well as Figure 4In this state, the multiple groups of front plates 8 will form a wall, thereby resisting the water flow to slow down the flow rate of water. At this time, the opening at the bottom of a group of rotating columns 7 corresponds to a group of plug holes 23 on the bottom frame 2. When the inner shaft 9 continues to rotate, it will drive a group of sliding columns 16 to be compressed into the opening 15. The sliding columns 16 squeeze the gas inside the opening 15, and then squeeze the gas in the air channel 18, so that the gas in the air channel 18 squeezes the piston column 19, so that the plug block 20 is inserted into the plug hole 23 through the opening 21. At this time, the rotating column 7 is stuck and will not continue to rotate, ensuring that the front plate 8 will not rotate excessively; When the water flow in the river decreases, the first spring 6 overcomes the water pressure and drives the extrusion cylinder 4 to reset, thereby producing an air suction effect, and negative pressure is also generated inside the pipe 5 to pull the first rack 11 back, thereby producing a movement opposite to the above movement. When the inner shaft 9 initially rotates, it drives the above-mentioned group of sliding columns 16 to extend out of the opening 15, thereby generating negative pressure in the opening 15 and the airway 18, and sucking back the above-mentioned group of piston columns 19 and plug blocks 20. In this way, the inner shaft 9 can continue to drive the rotating column 7 to reverse, so that the rotating column 7 drives the front plate 8 to gradually reverse and open until it is fully opened, so that the normal flow of water at the fishway entrance can be ensured. At this time, another group of piston columns 19 and plug blocks 20 are inserted into another group of jacks 23 using the same principle to limit the rotation of the rotating column 7.

[0023] On the basis of the above structure, a rear plate 12 is slidably connected to the back of the front plate 8, and the front plate 8 rotates with the rear plate 12. A second rack 13 is provided on the top of the rear plate 12, and a tooth pattern that meshes with the second rack 13 is also provided on the top of the outer side of the inner shaft 9. The front plate 8 and the rear plate 12 are both provided with water holes that cooperate with each other. Figure 1 When in the state, water can also flow through the water holes on the front plate 8 and the rear plate 12. However, when the water flow is too large, the inner shaft 9 will use the tooth pattern to drive the rear plate 12 to move sideways through the second rack 13 while continuing to rotate, so that the water holes on the rear plate 12 and the water holes on the front plate 8 are staggered with each other, thereby preventing the water from passing through the water holes, further slowing down the water flow at the fishway entrance, and moving in the opposite direction when returning to the original position.

[0024] The present invention also designs the inner shaft 9 as a hollow structure, and a water pipe 22 is connected to the bottom of the inner shaft 9 through an adapter, and the other end of the water pipe 22 extends to the upstream position, a row of first water holes 24 are arranged on the outside of the inner shaft 9, and a row of second water holes 25 cooperating with the first water holes 24 are arranged on the outside of the rotating column 7. When the water flow is small, the inner shaft 9 will continue to reverse and the first water holes 24 will correspond to the second water holes 25. The water pipe 22 will use its own water pressure to spray the upstream water through the first water holes 24 and the second water holes 25 to supplement the water flow velocity at the entrance of the fishway, and it can move in the opposite direction when returning to its position.

[0025] A limiting column 27 is arranged on the top of the rotating column 7 , and a limiting groove 26 cooperating with the limiting column 27 is arranged on the top frame 2 , which can further limit the rotation of the rotating column 7 .

[0026] The present invention generally utilizes the pressure of water flow to control the flipping of the front and rear plates, thereby controlling the flow rate of water at the fishway inlet, and providing a stable range of water flow rate for the fishway inlet.

[0027] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A fish-attracting device at the entrance of a fishway, comprising two wing walls (1) fixedly arranged in a river channel for forming a fishway, wherein the fishway entrances of the two wing walls (1) are provided with fixing plates (3), and a frame (2) is fixedly arranged at one of the wing walls (1), characterized in that: The frame (2) is rotatably connected to a plurality of rotating columns (7) on the inner side, a front plate (8) is provided on the outer side of the rotating column (7), an inner shaft (9) is rotatably connected to the inner side of the rotating column (7), pressure plates (14) are fixed on both sides of the inner shaft (9), a cavity for the pressure plate (14) to move is provided inside the rotating column (7), a plurality of groups of openings (15) are provided on the inner side of the rotating column (7), a plurality of groups of sliding columns (16) cooperating with the openings (15) are fixed on both sides of the pressure plate (14), and the outer sides of the sliding columns (16) are located in the openings. A second spring (17) is also sleeved between the frame (15) and the pressure plate (14); a first rack (11) is slidably connected to the top of the frame (2); a tooth pattern that meshes with the first rack (11) is provided at the top of the outer side of the inner shaft (9); an extrusion cylinder (4) is provided on the side of the fixed plate (3) close to the frame (2); a first spring (6) is provided inside the extrusion cylinder (4); the inside of the extrusion cylinder (4) is connected to one end of the pipe (5); one end of the first rack (11) is slidably matched with the inner wall of the other end of the pipe (5) through a piston.

2. A fishway inlet fish attracting device according to claim 1, characterized in that: The inner shaft (9) is designed as a hollow structure. A water pipe (22) is connected to the bottom of the inner shaft (9) through an adapter, and the other end of the water pipe (22) extends to an upstream position. A row of first water holes (24) is arranged on the outside of the inner shaft (9), and a row of second water holes (25) cooperating with the first water holes (24) is arranged on the outside of the rotating column (7).

3. A fishway inlet fish attracting device according to claim 1, characterized in that: The back side of the front plate (8) is slidably connected to a rear plate (12), and a second rack (13) is provided on the top of the rear plate (12). The outer top end of the inner shaft (9) is also provided with a tooth pattern that meshes with the second rack (13).

4. A fishway inlet fish attracting device according to claim 3, characterized in that: The front plate (8) and the rear plate (12) are both provided with water holes that cooperate with each other.

5. A fishway inlet fish attracting device according to claim 1, characterized in that: A limiting column (27) is arranged on the top of the rotating column (7), and a limiting groove (26) cooperating with the limiting column (27) is arranged on the top frame (2).

6. A fishway inlet fish attracting device according to claim 1, characterized in that: The entrance of the fishway is located on the inner side of the wing wall (1) and is equipped with a fish attracting lamp (28).

7. A fishway inlet fish attracting device according to claim 1, characterized in that: A mounting block (10) is fixed to the top of the frame (2); the first rack (11) movably passes through the mounting block (10), and the first rack (11) is limited by the mounting block (10).

8. The fishway inlet fish attracting device according to claim 1, characterized in that: Both ends of the inner shaft (9) movably pass through the frame (2).

9. A fishway inlet fish attracting device according to claim 1, characterized in that: Two groups of air passages (18) communicating with the opening (15) are also provided inside the protruding position on the inner side of the rotating column (7); the bottom of the air passage (18) is piston-connected to a piston column (19), and the bottom of the piston column (19) is connected to an insert block (20); the bottom of the rotating column (7) is provided with an opening (21) for the insert block (20) to be extended and retracted; and the bottom of the frame (2) is provided with a socket (23) cooperating with the insert block (20).

10. A method for attracting fish at a fishway inlet fish attracting device, characterized in that: The following steps are involved: When the water flow in the river increases, the water flow will impact the extrusion cylinder and compress the first spring. The gas in the extrusion cylinder is compressed into the inside of the pipeline for transmission, so that the gas squeezes one end of the first rack. Since one end of the first rack is connected to the inside of one end of the pipeline in a piston-like manner, it will push the first rack to translate. The first rack uses the tooth pattern to drive the inner shaft to rotate. At this time, there is air pressure in the opening, and the inner shaft will drive the rotating column to rotate together through the pressure plate and the sliding column. The rotating column drives the front plate to flip, so that the gap between the multiple groups of front plates becomes smaller, thereby reducing the flow of water at the entrance of the fishway. At this time, the multiple groups of front plates will form a wall, which can resist the water flow to slow down the flow rate of water. At this time, the opening at the bottom of a group of rotating columns corresponds to a group of plug holes on the bottom frame. When the inner shaft continues to rotate, it will drive a group of sliding columns to be compressed into the opening. The sliding column squeezes the gas inside the opening, and then squeezes the gas in the airway, so that the gas in the airway squeezes the piston column, so that the plug is inserted into the plug hole through the opening. At this time, the rotating column is stuck and will not continue to rotate, ensuring that the front plate does not rotate excessively; When the water flow in the river decreases, the first spring overcomes the water pressure and drives the extrusion cylinder to reset, thereby producing an air suction effect. Negative pressure is also generated inside the pipe to pull the first rack back, thereby producing a movement opposite to the above movement. When the inner shaft initially rotates, it drives the above-mentioned group of sliding columns to extend out of the opening, thereby generating negative pressure in the opening and the airway, and sucking back the above-mentioned group of piston columns and plug blocks. In this way, the inner shaft can continue to drive the rotating column to reverse, so that the rotating column drives the front plate to gradually reverse and open until it is fully opened, so as to ensure the normal flow of water at the fishway entrance. At this time, another group of piston columns and plug blocks are inserted into another group of jacks using the same principle to limit the rotation of the rotating column.

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