Device for automatically sorting catches along with water flow

Abstract

The invention provides a device for automatically sorting catches along with water flow, which comprises an inclined fish chute, a transition chute in butt joint with the bottom end of the fish chute and a weighing and measuring chute in butt joint with the movable end of the transition chute, and a plurality of fish screening grids are arranged in the fish chute along the length direction of the fish chute; fish screening rods in the fish screening grids are arranged in parallel to a vertical plane where the length direction of the fish chute is located, the distance between every two adjacent fish screening rods in the fish screening grids is gradually decreased in the water flow direction in the fish chute, the inner side and the outer side of each fish screening grid are each provided with a to-be-detected area of the catches, all the to-be-detected areas can be arranged in a communicating mode, and the to-be-detected areas are communicated with the fish chute. The top of the to-be-detected area close to the bottom end of the fish chute is provided with an opening for manually selecting internal catches into the transition chute, and the to-be-detected area is internally provided with an oxygenation pump. According to the invention, the effects of automatic sorting and improvement of the survival rate in the fish weighing and measuring process are achieved.

Description

[0001] This invention is a divisional application of “A system for automatically sorting fish caught along with water flow” (application number: 2022113754891, application date: 2022-11-04) Technical Field The invention relates to the technical field of fish catch sorting, in particular to a device for automatically sorting fish catches along with water flow. Background Art

[0002] The requirements for ecological compensation for large-scale projects such as domestic hydropower stations or reservoir dams are becoming more and more stringent. The ecological compensation of collecting fish by means of fish lifts, fish collection stations, nets or boxes and then transporting fish across the dam for release has only been carried out recently. During the operation, it is necessary to count the types, quantity, length and weight of such fish catches in order to provide objective and strong evidence for environmental impact assessment acceptance. When sorting the catches, the existing sorting methods include manual sorting using sorting screens and sorting by hand or with a scoop net. Both sorting methods will frequently stimulate the fish body, and when using a scoop net, the fish will be out of water for a long time, which will cause lack of oxygen and death. In order to protect the collected fish as much as possible and prevent them from being harmed by humans when sorting the catches, a device for automatically sorting the catches with the water flow is proposed. Summary of the invention

[0003] The technical problem to be solved by the present invention is a device for automatically sorting fish catches along with water flow, which solves the problems in the prior art that the fish bodies are frequently stimulated during the existing fish catch sorting and the fish are out of water for a long time during sorting and are prone to death due to lack of oxygen.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for automatically sorting fish catches with water flow, an inclined fish trough, a transition trough connected to the bottom of the fish trough and a weighing trough connected to the movable end of the transition trough, a plurality of layers of fish screening grids are arranged along the length direction of the fish trough, the fish screening rods in the fish screening grids are arranged parallel to the vertical plane where the length direction of the fish trough is located, and the spacing between adjacent fish screening rods in the fish screening grids decreases from top to bottom, a test area for fish catches is arranged on the rear side of each fish screening grid, and all the test areas are connected to each other, a fish release gate is rotatably provided on the bottom side wall of the test area near the bottom of the fish trough, and an oxygen pump is arranged in each test area.

[0005] Preferably, the top of the fish screening grille is connected to the top inner wall of the fish trough, and the bottom end of the fish screening grille is connected to the test area, and a reverse water baffle is rotatably provided on one side of the test area close to the fish screening grille, which can be pushed away by the fish and water swimming along the length direction of the fish screening grille; a step plate is provided at the bottom of the test area, and the movable end of the reverse water baffle is attached to the vertical part of the top corner of the step plate, and the bottom end of the fish screening grille is connected to the top of the step plate.

[0006] Preferably, the test areas are distributed in a stepped structure, and a fish gate is rotatably provided on one side of the test area away from the fish screening grille, one end of the rotating shaft of the fish gate is coaxially fixedly connected to the output shaft of a self-locking motor arranged on the outer wall of the fish trough, and the two side walls of the fish gate are in contact with the inner wall of the fish trough, and the fish gate of the upper test area is arranged directly above the top opening of the lower test area.

[0007] Preferably, a drainage pipe is provided in the test area at the bottom, and the top of the step plate at the bottom of the test area is connected to the bottom of the fish trough.

[0008] Preferably, the top cover of the fish trough is provided with an escape prevention plate.

[0009] Preferably, the fish screening rod is a round rod.

[0010] The present invention provides a device for automatically sorting fish catches along with water flow, which has the following beneficial effects: 1. Through the inclined fish trough, when the fish are put for sorting, the fish move along the fish trough with the water, ensuring that the fish will not leave the water during the sorting process to avoid death due to lack of oxygen.

[0011] 2. The fish are sorted through the fish screening grid. The distance between adjacent fish screening rods in the vertical plane along the length of the fish trough represents the thickness of the fish body. This is used as the standard for sorting the catch. The catch swims along the fish trough with the water and is sorted automatically without human intervention to stimulate the fish body.

[0012] 3. After automatic sorting, the fish that have not passed through the fish screening rod enter the testing area, and the oxygen pump in the testing area is used to ensure the survival conditions of the fish.

[0013] 4. There are multiple fish screening grids arranged along the fish trough. The closer to the bottom of the fish trough, the smaller the distance between adjacent fish screening rods in the fish screening grid. After entering the test area, the fish in the bottom test area are the smallest and most vulnerable. They are weighed first and then enter the large temporary holding pond first to improve the survival rate of the catch sorting and weighing.

[0014] 5. The test areas can communicate with each other. After the fish in the bottom test area are weighed, the bottom test area is connected to a test area above it. The fish in the upper test area follow the water into the bottom test area to wait for weighing. In the process of changing the test area, ensure that the fish do not leave the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a front view of an embodiment of the present invention.

[0016] Figure 2 It is a front view of the internal structure of an embodiment of the present invention.

[0017] Figure 3 It is a side view of the internal structure of an embodiment of the present invention.

[0018] In the figure: 1, fish trough; 2, transition trough; 3, weighing trough; 4, bracket; 5, fish screening grid; 6, third test area; 61, top step plate; 62, top reverse water baffle; 63, top fish gate; 7, second test area; 71, middle step plate; 72, middle reverse water baffle; 73, middle fish gate; 8, first test area; 81, bottom step plate; 82, bottom reverse water baffle; 83, bottom fish gate; 84, drain pipe; 9, escape prevention plate. DETAILED DESCRIPTION

[0019] like Figure 1-3 As shown, the present invention provides an automatic sorting device for fish catches along with water flow, comprising an inclined fish trough 1, a transition trough 2 connected to the bottom end of the fish trough 1, and a weighing trough 3 connected to the movable end of the transition trough 2, wherein a plurality of fish screening grids 5 are arranged in the fish trough 1 along its length direction, the fish screening rods in the fish screening grids 5 are arranged parallel to the vertical plane where the length direction of the fish trough 1 is located, and the spacing between adjacent fish screening rods in the fish screening grids 5 decreases from top to bottom, a catch waiting area is arranged at the rear side of each fish screening grid 5, and all the waiting areas are arranged to be connected, a fish release gate is rotatably provided on the bottom side wall of the waiting area near the bottom end of the fish trough 1, and an oxygenation pump is arranged in each of the waiting areas.

[0020] Two layers of fish screening grilles 5 are arranged in the fish trough 1. When the fish trough 1 is in a tilted state, the fish screening grilles 5 are also in a tilted state. There are three test areas. The third test area 6 is located at the tail of the fish screening grille 5 on the top layer, the second test area 7 is located at the tail of the fish screening grille 5 on the bottom layer, and the first test area 8 is located at the tail of the fish trough 1. The fish screening grid 5 on the top layer screens out the big fish in the catch, and under the guidance of the inclined fish screening grid 5, the big fish slips into the third test area 6 with the water; the spacing between adjacent fish screening rods in the bottom fish screening grid 5 is smaller than the spacing between adjacent fish screening rods in the top fish screening grid 5, the bottom fish screening grid 5 screens out the medium-sized fish, and the small fish pass through the fish screening grid 5 and enter the inner bottom of the fish trough 1, where the fish flow with the water is utilized, and the nature of the fish to escape downward to the dark place after being stimulated is also utilized. Similarly, the inclined bottom fish screening grid 5 and the fish trough 1 allow the medium-sized fish and the small fish to enter the second test area 7 and the first test area 8 respectively; each test area temporarily raises the fish, and by opening the fish release gate of the first test area 8, some of the small fish slip into the transition trough 2, and the small fish are weighed. After the small fish are weighed, the second test area 7 and the first test area 8 are connected to weigh the medium-sized fish, and finally the large fish are weighed.

[0021] like Figure 1-3 As shown, in order to prevent the third test area 6 and the second test area 7 from overflowing due to continuous water inflow, the top of the fish screening grille 5 is connected to the top inner wall of the fish trough 1, and the bottom of the fish screening grille 5 is connected to the test area. A reverse water baffle that can be pushed away by the fish and water swimming along the length direction of the fish screening grille 5 is rotatably arranged on one side of the test area close to the fish screening grille 5, and a step plate is arranged at the bottom of the test area, and the movable end of the reverse water baffle is attached to the vertical part of the top corner of the step plate, and the bottom of the fish screening grille 5 is connected to the top of the step plate.

[0022] A top reverse water baffle 62 is arranged on one side of the third test area 6, a middle reverse water baffle 72 is arranged on one side of the second test area 7, and a bottom reverse water baffle 82 is arranged on one side of the first test area 8. When fish enter, large fish and water slide along the top fish screening grille 5, push open the top reverse water baffle 62, and enter the third test area 6. Because large fish and water continue to enter the third test area 6, the water level in the third test area 6 will exceed the top of the top step plate 61 at the bottom of the third test area 6. Under the action of water pressure, the top reverse water baffle 62 is pushed to a vertical state to close the third test area 6. Similarly, when the medium-sized fish completely enters the second test area 7, the middle reverse water baffle 72 will be closed; when the water level in the fish trough 1 is close to the water level in the first test area 8, the bottom reverse water baffle 82 on one side of the first test area 8 will be closed.

[0023] Of course, by increasing the height difference between the top step plate 61, the middle step plate 71 and the bottom step plate 81 (i.e., the distance between the top and bottom surfaces of the step plates), the water storage capacity in the third test area 6, the second test area 7 and the first test area 8 can be increased to ensure that the fish will not leave the water. When the top reverse water baffle plate 62 is set to an inclined state, the third test area 6 is sealed, i.e., Figure 2 In the process, the hinged end of the top reverse water baffle 62 is moved to the left, and the top reverse water baffle 62 is used for sealing by its own weight, which can also ensure that there is enough water in the third test area 6. Similarly, it can be applied to the second test area 7 and the first test area 8. The sealing of the test area can prevent fish from migrating.

[0024] like Figure 2 As shown, the fish is automatically released. The test areas are arranged in a stepped structure, and a fish release gate is rotatably arranged on one side of the test area away from the fish screening grille 5, one end of the rotating shaft of the fish release gate is coaxially fixedly connected with the output shaft of the self-locking motor arranged on the outer wall of the fish trough 1, and the two side walls of the fish release gate are in contact with the inner wall of the fish trough 1, and the fish release gate of the test area located above is arranged just above the top opening of the test area located below.

[0025] A top fish gate 63 is set on the other side of the third test area 6, a middle fish gate 73 is set on the other side of the second test area 7, and a bottom fish gate 83 is set on the other side of the first test area 8. When weighing the catch, the bottom fish gate 83 is opened first and then closed, so that some small fish slip into the transition tank 2 with the water, and the body length and weight of the small fish are measured; after the small fish are weighed, the middle fish gate 73 is opened to allow the medium-sized fish to enter the first test area 8, and the bottom fish gate 83 is opened and closed continuously to weigh the medium-sized fish, and finally the top fish gate 63 is opened to weigh the large fish according to the above steps. Of course, in order to avoid large fish from falling, a certain amount of water needs to be added to the second test area 7 and the first test area 8 when releasing the fish.

[0026] like Figure 2 As shown, when the catch is put into the fish tank 1, too much water enters the first test area 8, causing the first test area 8 to overflow. In order to prevent the fish in the first test area 8 from swimming out from the top, a drainage pipe 84 is provided in the test area at the bottom, and the top of the step plate at the bottom of the test area is connected to the bottom end of the fish tank 1.

[0027] like Figure 1-3 As shown, in order to prevent the big fish from jumping out from the top of the fish tank 1. The top cover of the fish tank 1 is equipped with an escape prevention plate 9.

[0028] As a preferred embodiment of the present invention, in order to prevent the fish from being scratched when the fish passes through the fish screening rod, the fish screening rod is a round rod.

Claims

1. A device for automatically sorting fish catches along with water flow, characterized in that: The invention comprises an inclined fish trough (1), a transition trough (2) connected to the bottom end of the fish trough (1), and a weighing trough (3) connected to the movable end of the transition trough (2). The fish trough (1) is provided with a plurality of fish screening grids (5) along its length direction. The fish screening rods in the fish screening grids (5) are arranged parallel to a vertical plane where the length direction of the fish trough (1) is located, and the spacing between adjacent fish screening rods in the fish screening grids (5) decreases from top to bottom. A fish catch waiting area is arranged at the rear side of each fish screening grid (5), and all waiting areas are arranged to be connected. A fish release gate is rotatably arranged on the bottom side wall of the waiting area near the bottom end of the fish trough (1), and an oxygen pump is arranged in each waiting area.

2. The device for automatically sorting fish caught along with water flow as claimed in claim 1, characterized in that: The top end of the fish screening grille (5) is connected to the top inner wall of the fish trough (1), and the bottom end of the fish screening grille (5) is connected to the test area. A reverse water baffle plate which can be pushed away by fish and water swimming along the length direction of the fish screening grille (5) is rotatably arranged on one side of the test area close to the fish screening grille (5). The reverse water baffle plate is arranged at the bottom of the test area. The movable end of the reverse water baffle plate is attached to the vertical part of the top corner of the step plate. The bottom end of the fish screening grille (5) is connected to the top end of the step plate.

3. The device for automatically sorting fish caught along with water flow as claimed in claim 2, characterized in that: The test areas are arranged in a stepped structure. A fish release gate is rotatably provided on one side of the test area away from the fish screening grille (5). One end of the rotation shaft of the fish release gate is coaxially fixedly connected to the output shaft of a self-locking motor arranged on the outer wall of the fish trough (1). The two side walls of the fish release gate are in contact with the inner wall of the fish trough (1). The fish release gate of the upper test area is arranged directly above the top opening of the lower test area.

4. The device for automatically sorting fish caught along with water flow as claimed in claim 3, characterized in that: A drainage pipe (84) is provided in the test area at the bottom, and the top end of the step plate at the bottom of the test area is connected to the bottom end of the fish trough (1).

5. The device for automatically sorting fish catches along with water flow according to any one of claims 1 to 4, characterized in that: The top cover of the fish slide (1) is provided with an escape prevention plate (9).

6. A device for automatically sorting fish caught along with water flow as claimed in any one of claims 1 to 4, characterized in that: The fish screening rod is a round rod.

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