Structure for enhancing multi-target fish passing effect of vertical slot fishway

Abstract

The application discloses a structure for enhancing the multi-target fish passing effect of a vertical-seam fishway, which comprises a vertical-seam fishway, a fishway partition plate arranged in the fishway, vertical seams arranged on the fishway partition plate, a plurality of fishway pool rooms formed by the fishway partition plate, fish collecting reservoirs arranged on both sides of the upstream end of the fishway, an outlet of each fish collecting reservoir being communicated with an upstream reservoir area, an edge-wall fish-entering channel arranged on the fishway edge wall, a fish collecting box arranged at the outlet of the edge-wall fish-entering channel, and a fish collecting box circulating device arranged at the fishway edge wall and used for conveying the fish collecting box into the fish collecting reservoir and then conveying the fish collecting box in the fish collecting reservoir to the outlet of the edge-wall fish-entering channel. When fishes pass through the edge-wall fish-entering channel and reach the fish collecting box arranged outside the fishway edge wall, the fish collecting box is conveyed into the fish collecting reservoir by the fish collecting box circulating device, and then the fishes can swim from the fish collecting box into the fish collecting reservoir and swim into the upstream reservoir area through the outlet of the fish collecting reservoir.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water conservancy and hydropower ecological protection, and particularly relates to a structure for enhancing multi-target fish passing effect of a vertical-seam fishway. BACKGROUND

[0002] The development of water energy resources provides sufficient power for the economic society of human beings, but the construction of dams destroys the connectivity of rivers and hinders the gene exchange between aquatic organisms. Nowadays, the construction of fishways has become one of the effective measures to restore river connectivity and reduce the habitat fragmentation degree of river sections with reduced water.

[0003] As a type of fishway, the vertical-seam fishway is the most common type of fishway. The fishway is composed of a rectangular water channel with a certain bottom slope and a series of vertical guide long and short partitions. The entire fishway is divided into multiple fishway pool rooms by the partitions. The upstream water enters the next fishway pool room through the vertical seam. After the water flow passes through the vertical seam, a jet is formed, and the energy is dissipated through the mixing action in the fishway pool room. The flow velocity at the vertical seam of the fishway must be less than the maximum swimming speed of the fish passing through. Due to the strong particularity of the vertical-seam fishway, the energy dissipation structure of the vertical-seam fishway cannot be considered alone when designing the fishway. The design must also consider different fish passing objects, the habitat water layer of the fish passing object, and the swimming ability of the fish passing object.

[0004] Through the investigation of the operation conditions and the internal environment of some vertical-seam fishways, it is found that fish with weak swimming ability stay in the backflow area of the vertical-seam fishway pool room for a long time or return to the fishway inlet. It is also found that a small part of fish lay eggs on the edges of the long and short partitions in the pool room without upriver migration. This also reflects that the flow velocity condition in the pool room is suitable for the flow velocity requirement of fish completing egg laying, which reduces the fish passing effect of the fishway and directly leads to the fact that part of the fish downstream of the dam cannot complete the upriver migration to the reservoir area to complete the life history.

[0005] In existing technologies, patent applications such as CN114892611A (disclosing a vertical slit fishway suitable for multiple target fish to migrate upstream) and CN116427366A (disclosing a fishway with dynamic baffles) both start from the principle of ships passing through locks. They indirectly control the flow velocity at the vertical slit by changing the slope of the fishway and the opening of the long baffles in the fishway chamber. However, these patents are extremely complex to operate and have very low timeliness. The gate control at the inlet also needs to be adjusted in real time, making it difficult to ensure that each operation link is closely linked. Moreover, the complex operating procedure may miss the fish migration season. The flow velocity at the vertical slit is the location of the highest flow velocity in the vertical slit fishway, and its reasonable setting is the key to whether fish can continuously pass through the chamber and reach the upstream fishway outlet. According to the research statistics of Cai Lu et al. (2022), the maximum flow velocity in fish passage facilities in southwestern my country and the middle and lower reaches of the Yangtze River is generally 0.82-1.85 m / s. It can be seen that the flow velocity at the vertical gap is relatively large, and its utilization value is relatively high. In addition, with global warming and river changes, the food web and fish habitat suitability of rivers will also change. If fish with weak swimming ability that have appeared due to river changes are used as new protected fish, but their swimming ability is lower than the minimum value of the initial flow velocity design of the fish passage, it will create obstacles for the upstream migration of such fish. Summary of the Invention

[0006] The main objective of this invention is to propose a structure that enhances the multi-target fish passage effect of vertical slotted fish passages, thereby addressing the aforementioned technical problems.

[0007] To achieve the above objectives, this invention proposes a structure to enhance the multi-target fish passage effect of a vertically slit fishway. The structure includes a vertically slit fishway, which is a trough-shaped structure composed of a fishway bottom plate and two side walls. Inside the fishway, a fishway partition is provided, with vertical slits forming the partition, dividing the fishway into multiple fishway chambers.

[0008] Fish collection reservoirs are set up on both sides of the upstream end of the fishway, and the outlets of the fish collection reservoirs are connected to the upstream reservoir area.

[0009] Fish entry channels are provided in the side walls of the fishway;

[0010] Fish collection boxes are installed at the exit of the fish inlet channel in the side wall;

[0011] A fish collection box circulation device is installed at the side wall of the fishway to transport the fish collection boxes to the fish collection tank, and then transport the fish collection boxes in the fish collection tank to the exit of the fish inlet channel at the side wall.

[0012] Preferably, the fishway side walls on both sides of the fishway comprise inner side walls and outer side walls from inside to outside, the inner side walls extend downward to the base plate, the base plate, the inner side walls and the fishway bottom plate constitute a supplementary slide, the fish collecting box circulating device comprises the supplementary slide, a plurality of track wheels arranged inside the outer side walls and a track installed on the track wheels, the track wheels are rotatably installed on the inner side walls through wheel shafts, an inclined slide is arranged between the track wheels at the upstream end and the fish collecting tank to transport the fish collecting box on the track to the fish collecting tank, the fish collecting tank is connected with the supplementary slide, a pushing device is arranged in the base plate to push the fish collecting box upward from the supplementary slide to the outlet of the fish entry passage of the side wall, the pushing device is controlled and connected with the PC control end, an electromagnetic suction disc is arranged on the track to adsorb the fish collecting box, the electromagnetic suction disc is controlled and connected with the PC control end, and the fish collecting box circulating device further comprises a power device for driving the track wheels to rotate.

[0013] Preferably, a limiting block is arranged on the base plate, one limiting block is arranged on the upstream side and the downstream side of each pushing device respectively, a driving device is arranged in the base plate to drive the limiting blocks to move up and down, and the driving device is controlled and connected with the PC control end.

[0014] Preferably, the power device comprises an impeller installed at the position of the vertical seam, blades are arranged on the impeller, the impeller is installed on the end face of the fishway partition plate through an impeller shaft, the shaft penetrates through the inner side wall and extends to the inside of the fishway partition plate, and the impeller shaft is in transmission connection with the shaft through a transmission structure.

[0015] Preferably, the transmission structure between the impeller shaft and the shaft comprises bevel gears arranged on the impeller shaft and the shaft respectively, a vertical rotating shaft vertically installed in the inside of the fishway partition plate, and toothed discs arranged at the top end and the bottom end of the vertical rotating shaft, and the bevel gears on the impeller shaft and the shaft are respectively in meshing connection with the toothed discs at the top end and the bottom end of the vertical rotating shaft.

[0016] Preferably, the height of the axis of the impeller shaft is flush with the height of the horizontal plane in the fishway.

[0017] Preferably, the fish collecting box comprises a box body and an elastic telescopic body arranged on the top of the box body, a magnetic suction block is arranged on the top of the elastic telescopic body to be adsorbed with the electromagnetic suction disc.

[0018] Preferably, the fish collecting box is provided with a fish inlet, and a door is arranged at the fish inlet and connected with the PC control terminal for controlling the opening and closing of the door to open or close the fish inlet; a fish attracting device is arranged on the box and connected with the PC control terminal; a monitoring device is arranged in the box for monitoring the number of fish collected in the fish collecting box and connected with the PC control terminal; and an electric gate is arranged at the fish inlet passage of the fishway side wall to facilitate the fish to enter the fish collecting box and prevent water leakage, and the electric gate is connected with the PC control terminal.

[0019] Preferably, the fish collecting box is provided with a fish inlet, and a door is arranged at the fish inlet and connected with the PC control terminal for controlling the opening and closing of the door to open or close the fish inlet; a fish attracting device is arranged on the box and connected with the PC control terminal; a monitoring device is arranged in the box for monitoring the number of fish collected in the fish collecting box and connected with the PC control terminal; and an electric gate is arranged at the fish inlet passage of the fishway side wall to facilitate the fish to enter the fish collecting box and prevent water leakage, and the electric gate is connected with the PC control terminal.

[0020] Preferably, the fishway partition plate 101 comprises a long partition plate and a short partition plate, the short partition plate is connected with the fishway side wall on one side, and the long partition plate is connected with the fishway side wall on the other side; a vertical gap is formed between the long partition plate and the short partition plate; and the fish inlet passage of the side wall is arranged at a corner region close to the long partition plate or close to the short partition plate.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] (1) In the present application, by arranging the fish inlet passage of the side wall, the fish collecting box, the fish collecting tank and the fish collecting box circulating device, when the fish reaches the fish collecting box arranged outside the fishway side wall through the fish inlet passage of the side wall, the fish collecting box is conveyed into the fish collecting tank by the fish collecting box circulating device, and then the fish can swim from the fish collecting box into the fish collecting tank, and since the outlet of the fish collecting tank is connected with the upstream tank area, the fish in the fish collecting tank can swim into the upstream tank area from the outlet of the fish collecting tank, and the fish can complete the dam crossing, that is, the fish with weak swimming ability can also complete the dam crossing without passing through the vertical gap. Therefore, the present application solves the problem of fish retention in the internal pool of the vertical gap type fishway.

[0023] (2) In the present application, the power device in the fish collecting box circulating device is a impeller structure arranged at the vertical gap position, which utilizes the water flow at the vertical gap to drive the rotation of the impeller as a power source, and the rotation of the impeller provides power for the entire conveying system, without the need for additional power devices, thereby reducing the energy consumption of the entire device. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without any creative effort.

[0025] Figure 1 Structure for enhancing multi-target fish passing effect of fishway with vertical seam in the present application

[0026] Figure 2 Installation structure of impeller in the present application Figure 1 ;

[0027] Figure 3 Installation structure of impeller in the present application Figure 2 ;

[0028] Figure 4 Schematic diagram of track operation in the present application

[0029] Figure 5 Schematic diagram of fish entering channel of side wall located at position close to upstream side of short partition in the present application

[0030] Figure 6 Structure schematic diagram of fish collecting tank in the present application

[0031] Figure 7 Schematic diagram of mutual attraction between magnetic block of fish collecting tank and electromagnetic chuck on track in the present application

[0032] Figure 8 Schematic diagram of upward movement of fish collecting tank pushed by pushing device in the present application

[0033] Figure 9 Schematic diagram of sliding process of fish collecting tank in supplementary slide in the present application

[0034] Figure 10 Top view of fish collecting tank part in the present application

[0035] Figure 11 Side view of fish collecting tank part in the present application

[0036] Figure 12 Schematic diagram of fish swimming to upstream tank area in fish collecting tank in the present application

[0037] Figure 13 Schematic diagram of fish collecting tank overturning process in the present application

[0038] Figure 14 Schematic diagram of distribution position of fish entering channel of side wall in fishway pool chamber in the present application

[0039] Figure 15 The implementation steps and PC control flowchart of the present application.

[0040] The figure number explanation: 1, fishway; 101, fishway partition; 1011, long partition; 1012, short partition; 103, outer side wall; 104, inner side wall; 105, fishway bottom plate; 106, side wall fish entering passage; 107, base plate; 2, impeller; 201, blade; 202, impeller shaft; 302, vertical rotating shaft; 304, bevel gear; 305, toothed disc; 401, caterpillar wheel; 402, wheel shaft; 403, electromagnetic suction disc; 5, fish collecting box; 501, magnetic suction block; 502, box body; 503, opening and closing door; 504, fish inlet; 506, supplementary sliding way; 507, elastic telescopic body; 508, limiting block; 6, fish attracting device; 7, pushing device; 8, fish collecting pool; 801, square inlet; 802, electric baffle; 803, fish collecting pool outlet; 804, inclined sliding way; 805, rotating shaft; 806, vertical baffle. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0042] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0043] In combination with Figure 1 As shown in the figure, a structure for enhancing the multi-target fish passing effect of a vertical-seam fishway, comprising a vertical-seam fishway 1, which is a groove-shaped structure composed of a fishway bottom plate 105 and fishway side walls on both sides, a fishway partition 101 is arranged inside the fishway 1, vertical seams are arranged on the fishway partition 101, the fishway partition 101 divides the fishway 1 into multiple fishway pool chambers, fish collecting pools 8 are arranged on both sides of the upstream end of the fishway 1, and the outlets of the fish collecting pools 8 are connected to the upstream pool area; a side wall fish entering passage 106 is arranged on the fishway side wall; a fish collecting box 5 is arranged at the outlet of the side wall fish entering passage 106; a fish collecting box circulating device is arranged at the fishway side wall, which is used to convey the fish collecting box 5 into the fish collecting pool 8, and then convey the fish collecting box 5 in the fish collecting pool 8 to the outlet of the side wall fish entering passage 106.

[0044] By adopting the above structure, when the fish reaches the fish collecting box 5 arranged outside the fishway side wall through the side wall fish inlet channel 106, the fish collecting box 5 is conveyed into the fish collecting pool 8 by the fish collecting box circulating device, and then the fish can swim into the fish collecting pool 8 from the fish collecting box 5. Since the outlet of the fish collecting pool 8 is connected to the upstream pool area, the fish in the fish collecting pool 8 can swim into the upstream pool area from the outlet of the fish collecting pool 8, and the fish crossing the dam is completed. Therefore, by adopting the above structure, the fish with weak swimming ability can also complete the crossing of the dam without passing through the vertical joint, solving the problem of fish retention in the internal pool of the traditional vertical joint fishway and providing a reference for the re-planning of the fishway structure for the addition of new fish crossing objects in subsequent water conservancy projects.

[0045] In combination Figure 1 As shown in the drawings, the fishway side walls on both sides of the fishway 1 comprise an inner side wall 104 and an outer side wall 103 from inside to outside, and the inner side wall 104 and the outer side wall 103 are hollow structures; a base plate 107 is arranged in parallel and spaced apart below the fishway bottom plate 105; the inner side wall 104 extends downward to the base plate 107; the base plate 107, the inner side wall 104, and the fishway bottom plate 105 constitute a supplementary slide 506; the fish collecting box circulating device comprises the supplementary slide 506, a plurality of track wheels 401 arranged inside the outer side wall 103, and a track installed on the track wheels 401; the track wheels 401 are rotatably installed on the inner side wall 104 through an axle 402; an inclined slide 804 is arranged between the track wheels 401 at the upstream end and the fish collecting pool 8 to convey the fish collecting box 5 on the track into the fish collecting pool 8; the fish collecting pool 8 is connected to the supplementary slide 506; a pushing device 7 is arranged in the base plate 107 to push the fish collecting box 5 upward from the supplementary slide 506 to the outlet of the side wall fish inlet channel 106; the pushing device 7 is connected to the PC control end for control; an electromagnetic suction cup 403 is arranged on the track to adsorb the fish collecting box 5; the electromagnetic suction cup 403 is connected to the PC control end for control; the fish collecting box circulating device further comprises a power device for driving the track wheels 401 to rotate.

[0046] In combination Figure 8 As shown in the drawings, a limiting block 508 is arranged on the base plate 107, and one limiting block 508 is arranged on the upstream side and the downstream side of each pushing device 7, respectively; a driving device is arranged in the base plate 107 to drive the limiting block 508 to move up and down, and the driving device is connected to the PC control end for control.

[0047] In combination Figure 2As shown, the power device comprises an impeller 2 installed at the vertical slit position, and the impeller 2 is provided with blades 201; the impeller 2 is installed on the end face of the fishway partition 101 through an impeller shaft 202; the wheel shaft 402 passes through the inner side wall 104 and extends to the inside of the fishway partition 101, and the impeller shaft 202 is in transmission connection with the wheel shaft 402 through a transmission structure. In order to fully convert the kinetic energy generated by the water flow at the vertical slit position of the vertical slit fishway into the power source of the fish collecting box circulating device, the impeller 2 is arranged at the vertical slit position, which rotates under the impact of the water flow, thereby driving the track wheel 401 to rotate and providing the required power for the fish collecting box circulating device.

[0048] In combination Figure 3 As shown, the transmission structure between the impeller shaft 202 and the wheel shaft 402 comprises bevel gears 304 arranged on the impeller shaft 202 and the wheel shaft 402 respectively, a vertical rotating shaft 302 vertically installed inside the fishway partition 101, and toothed discs 305 arranged at the top and bottom ends of the vertical rotating shaft 302; the bevel gears 304 on the impeller shaft 202 and the wheel shaft 402 are respectively engaged with the toothed discs 305 at the top and bottom ends of the vertical rotating shaft 302. By engaging the bevel gears 304 with the toothed discs 305, the transmission ratio between the two can be used to achieve the effect of deceleration, and the specific transmission ratio is designed according to the water flow at the vertical slit position. In order to ensure that the impeller 2 rotates normally under the impact of the water flow, the height of the center line of the impeller shaft 202 needs to be controlled to be flush with the height of the horizontal plane in the fishway 1 during installation. That is, the lower half of the impeller 2 is always immersed in water. In the actual structure, since the wheel shaft 402 and the impeller shaft 202 are not at the same height, specifically, the impeller shaft 202 is above the wheel shaft 402, so the vertical rotating shaft 302 is arranged to facilitate the transmission of the impeller shaft 202 and the wheel shaft 402.

[0049] In combination Figure 6 As shown, the fish collecting box 5 comprises a box body 502 and an elastic telescopic body 507 arranged at the top of the box body 502, and a magnetic block 501 is arranged at the top of the elastic telescopic body 507 for mutual adsorption with the electromagnetic suction disc 403. The purpose of arranging the elastic telescopic body 507 is to play a buffering role. Specifically, in combination Figure 7 As shown, when the magnetic block 501 and the electromagnetic suction disc 403 are mutually adsorbed, the fish collecting box 5 is lifted and conveyed, and the fish collecting box 5 changes from a vertical state to a horizontal state, therefore, by arranging the elastic telescopic body 507, the elastic telescopic body 507 can play a buffering role when the fish collecting box 5 is horizontally placed, thereby reducing the fright of the fish inside.

[0050] In combination Figure 6As shown, the fish collecting box 5 of the fish collecting box working layer is provided with a fish inlet 504, and a door 503 is arranged at the fish inlet 504. The door 503 is connected with the PC control end for controlling the opening and closing of the fish inlet 504. An attracting device 6 is arranged on the box body 502 and connected with the PC control end. A monitoring device is arranged in the box body 502 for monitoring the number of fish collected in the fish collecting box, and the monitoring device is connected with the PC control end. An electric gate is arranged at the side wall fish inlet channel 106 and connected with the PC control end.

[0051] In order to better drive fish into the fish collecting box 5, the attracting device 6 is arranged on the box body 502, which can use sound, light and gas to attract fish. The door 503 at the fish inlet 504 is remotely controlled by the PC control end. The remote control of the PC control end of the door 503 is related to the monitoring device in the box body 502. When the monitoring device in the box body 502 detects that the number of fish collected in the fish collecting box reaches a certain threshold, the monitoring device will feed back the monitoring information in the box body 502 to the PC control end, so as to close the door 503 in time. At the same time, the electric gate in the side wall fish inlet channel 106 is also controlled to close by the PC control end, so as to prevent the fish in the fish collecting box 5 from returning to the fishway pool room and causing stagnation. After the door 503 is closed, the fish in the fish collecting box 5 can be prevented from falling when buffering at the fish inlet 504 during transmission.

[0052] The starting of the electromagnetic suction cup 403 is controlled by the PC control end. The monitoring device in the fish collecting box 5 is used to monitor the number of fish entering the fish collecting box 5. When the number of fish collected in the fish collecting box 5 reaches a certain number, a detection signal is transmitted to the PC control end. At this time, the electromagnetic suction cup 403 on the rotating track at the top of the fish collecting box 5 is powered on and generates an attractive force. The magnetic suction block 501 and the electromagnetic suction cup 403 are attracted to each other, the fish collecting box 5 is lifted and transported to the upstream.

[0053] When the fish collecting box 5 is transported to the upstream near the entrance of the inclined slide 804, the PC control end controls the electromagnetic suction cup 403 to be powered off, the magnetic suction block 501 and the electromagnetic suction cup 403 are separated from each other, and the fish collecting box 5 is automatically slid into the fish collecting box 8 in the upstream through the inclined slide 804. Then the PC control end controls the door 503 to be opened, the fish swims out of the fish collecting box 5 and swims to the upstream pool area from the fish collecting box outlet 803, and the work of separating the fish from the fish collecting box 5 is completed.

[0054] In the embodiment, the replenishing slide 506 in the replenishing layer of the fish collecting box is arranged in an inclined manner, and has the same slope as the slope of the fishway bottom plate 105. The empty fish collecting box 5 enters the replenishing slide 506 from the fish collecting pool 8, and automatically slides down the inclined replenishing slide 506 under the slope condition of the replenishing slide 506. The size of the replenishing slide 506 is matched with the width and height of the fish collecting box 5. The PC control end controls the pushing device 7 and pushes the fish collecting box 5 upward from the replenishing slide 506 to the outlet of the side wall fish inlet channel 106, thereby completing the circulation of the fish collecting box 5. The pushing device 7 can be an electric push rod or other structure, which is not described herein.

[0055] In combination Figure 13 As shown in the drawings, a square port 801 is arranged at the bottom of the fish collecting pool 8, and an electric flap 802 is arranged on the square port 801 through a rotating shaft 805. The electric flap 802 is connected with the PC control end for control, and is used for controlling the electric flap 802 to open or close around the rotating shaft. The outlet direction of the inclined slide 804 is aligned with the electric flap 802. The rotating shaft 805 is arranged on the square port 801 away from the inclined slide 804, and a vertical flap 806 is arranged on the side of the square port 801 close to the inclined slide 804. The square port 801 is aligned with the replenishing slide 506 below. Through the above structure, since the outlet direction of the inclined slide 804 is aligned with the electric flap 802, the fish collecting box 5 falling from the inclined slide 804 falls on the electric flap 802, and at this time, the fish collecting box 5 is in a flat lying state. In order to make the empty fish collecting box 5 enter the replenishing slide 506 in a vertical state, when the PC control end controls the electric flap 802 to slowly open, the fish collecting box 5 is changed from the flat lying state to the vertical state under the action of the vertical flap 806.

[0056] In the embodiment, when the fish collecting box 5 containing the driven fish enters the replenishing slide 506, if 1, 2, 3, 4, …, N fish collecting boxes 5 are arranged on each side of the fishway side wall, N side wall fish inlet channels 106 are correspondingly arranged. When the fish collecting box 5 is circulated, the first fish collecting box 5 will slide along the replenishing slide 506 to the position below the downstream end, that is, the last end of the side wall fish inlet channel 106. First, the last end of the limiting block 508 is lifted to block the fish collecting box 5. When the fish collecting box 5 reaches the position, it will be stopped from sliding by the limiting block 508, and the other limiting block 508 on the upstream side is lifted by the remote PC control end, so that the two limiting blocks 508 can fix one fish collecting box 5. Then, another fish collecting box 5 will repeat the step until all the fish collecting boxes 5 enter the corresponding positions in the replenishing slide 506. Then, the pushing device 7 pushes the fish collecting box 5 in the replenishing layer of the replenishing slide 506 upward to the outlet position of the corresponding side wall fish inlet channel 106 of the fish collecting box working layer.

[0057] In combinationFigure 2 、 Figure 14 As shown in FIG. 1, the fishway partition 101 comprises a long partition 1011 and a short partition 1012, the short partition 1012 is connected with the fishway side wall on one side, and the long partition 1011 is connected with the fishway side wall on the other side; a vertical gap is formed between the long partition 1011 and the short partition 1012; the side wall fish inlet passage 106 is arranged at a corner region position close to the long partition 1011 or close to the short partition 1012. Since the water flows through the vertical gap between the partitions to the continuous fishway pool chamber, it is similar to a jet flow, and a main flow area and a low flow speed fish resting area are formed in the pool chamber. The setting position of the side wall fish inlet passage 106 is located at the corner region position, and the water flow at this position is relatively slow, which is beneficial for the fish to enter the fish collecting box 5 from the side wall fish inlet passage 106, and is more suitable for the bottom-dwelling fish with weak swimming ability or the exhausted fish swimming from the downstream to this position through multiple pool chambers. Specifically, the side wall fish inlet passage 106 is arranged at a position close to the downstream side of the long partition 1011, and is arranged at a position close to the upstream side of the short partition 1012.

[0058] The above description is only the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like within the inventive concept of the present application, and the contents of the specification and drawings are included in the patent protection scope of the present application.

Claims

1. A structure for enhancing the multi-target fish passage effect of a vertically slit fishway, comprising a vertically slit fishway (1), the fishway (1) being a trough-shaped structure composed of a fishway bottom plate (105) and fishway sidewalls on both sides, wherein a fishway partition (101) is provided inside the fishway (1), and vertical slits are provided on the fishway partition (101), the fishway partition (101) dividing the fishway (1) into multiple fishway chambers, characterized in that: Fish collection reservoirs (8) are set up on both sides of the upstream end of the fishway (1), and the outlet of the fish collection reservoir (8) is connected to the upstream reservoir area; A fish entry passage (106) is provided in the side wall of the fish passage; A fish collection box (5) is installed at the exit of the fish inlet channel (106) on the side wall; A fish collection box circulation device is installed at the side wall of the fish passage to transport the fish collection box (5) to the fish collection reservoir (8), and then transport the fish collection box (5) in the fish collection reservoir (8) to the exit of the side wall fish inlet channel (106). The fishway (1) has two side walls on both sides, which include an inner side wall (104) and an outer side wall (103) from the inside to the outside. The outer side wall (103) has a hollow structure inside. A base plate (107) is provided parallel to each other below the fishway bottom plate (105); the inner side wall (104) extends downward to the base plate (107); the base plate (107), the inner side wall (104), and the fishway bottom plate (105) together constitute a supplementary slide (506). The fish collection box circulation device includes a replenishment slide (506), a plurality of track wheels (401) disposed inside the outer sidewall (103), and tracks mounted on the track wheels (401); the track wheels (401) are rotatably mounted on the inner sidewall (104) via axles (402); An inclined slide (804) is provided between the upstream track wheel (401) and the fish collection tank (8) to transport the fish collection box (5) on the track to the fish collection tank (8); the fish collection tank (8) is connected to the supplementary slide (506); a pushing device (7) is provided in the base plate (107) to push the fish collection box (5) upward from the supplementary slide (506) to the outlet of the side wall fish inlet channel (106); the pushing device (7) is controlled and connected to the PC control terminal; an electromagnetic chuck (403) is provided on the track to attract the fish collection box (5); the electromagnetic chuck (403) is controlled and connected to the PC control terminal; The fish collection box circulation device also includes a power unit for driving the track wheel (401) to rotate.

2. The structure for enhancing the multi-target fish passage effect of a vertical slit fishway as described in claim 1, characterized in that, Limiting blocks (508) are provided on the substrate (107), and each pushing device (7) has a limiting block (508) on its upstream and downstream sides respectively. A driving device is provided in the substrate (107) to push the limiting blocks (508) to move up and down. The driving device is connected to the PC control terminal.

3. The structure for enhancing the multi-target fish passage effect of a vertical slit fishway as described in claim 1, characterized in that, The power unit includes an impeller (2) installed at the vertical slot position, and blades (201) are provided on the impeller (2); the impeller (2) is installed on the end face of the fish passage partition (101) through the impeller shaft (202); the wheel shaft (402) passes through the inner side wall (104) and extends into the interior of the fish passage partition (101), and the impeller shaft (202) is connected to the wheel shaft (402) through a transmission structure.

4. The structure for enhancing the multi-target fish passage effect of a vertical slit fishway as described in claim 3, characterized in that, The transmission structure between the impeller shaft (202) and the wheel shaft (402) includes bevel gears (304) respectively disposed on the impeller shaft (202) and the wheel shaft (402), a vertical rotating shaft (302) vertically installed inside the fish passage partition (101), and gear discs (305) disposed at the top and bottom ends of the vertical rotating shaft (302); the bevel gears (304) on the impeller shaft (202) and the wheel shaft (402) mesh with the gear discs (305) at the top and bottom ends of the vertical rotating shaft (302) respectively.

5. The structure for enhancing the multi-target fish passage effect of a vertical slit fishway as described in claim 3, characterized in that, The height of the centerline of the impeller shaft (202) is flush with the height of the horizontal plane in the fish passage (1).

6. The structure for enhancing the multi-target fish passage effect of a vertical slit fishway as described in claim 1, characterized in that, The fish collection box (5) includes a box body (502) and an elastic telescopic body (507) set on the top of the box body (502). A magnetic block (501) is set on the top of the elastic telescopic body (507) for mutual attraction with the electromagnetic chuck (403).

7. The structure for enhancing the multi-target fish passage effect of a vertical slit fishway as described in claim 1, characterized in that, A fish inlet (504) is provided on the fish collection box (5), and an opening and closing door (503) is provided at the fish inlet (504). The opening and closing door (503) is connected to the PC control terminal and is used to control the opening and closing of the fish inlet (504). A fish attracting device (6) is provided on the box body (502), and the fish attracting device (6) is connected to the PC control terminal. A monitoring device is provided inside the box body (502) to monitor the number of fish collected in the fish collection box, and the monitoring device is connected to the PC control terminal. An electric gate is provided at the fish inlet channel (106) on the side wall, and the electric gate is connected to the PC control terminal.

8. The structure for enhancing the multi-target fish passage effect of a vertical slit fishway as described in claim 1, characterized in that, A square opening (801) is provided at the bottom of the fish collection tank (8). An electric baffle (802) is installed on the square opening (801) via a rotating shaft (805). The electric baffle (802) is connected to a PC control terminal and is used to control the opening or closing of the electric baffle (802) around the rotating shaft. The outlet direction of the inclined slide (804) is aligned with the electric baffle (802). The rotating shaft (805) is located on the side of the square opening (801) away from the inclined slide (804). A vertical baffle (806) is provided on the side of the square opening (801) close to the inclined slide (804). The lower part of the square opening (801) is aligned with the supplementary slide (506).

9. The structure for enhancing the multi-target fish passage effect of a vertical slit fishway as described in claim 1, characterized in that, The fishway partition 101 includes a long partition (1011) and a short partition (1012). The short partition (1012) is connected to the fishway sidewall on one side, and the long partition (1011) is connected to the fishway sidewall on the other side; a vertical slit is formed between the long partition (1011) and the short partition (1012); The sidewall fish inlet channel (106) is located at a corner area near the long partition (1011) or near the short partition (1012).

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