A system for catching adult fish

Abstract

The present invention discloses an adult fish catching system, which is applied to adult fish catching and relates to the field of fishing devices, including: a fish suction pipe, a fish discharge pipe, a first vacuum tank, a second vacuum tank, a vacuum pump, a water ring pump, a cooling pump, a cooling pipe is provided, the cooling pipe surrounds the vacuum pump, the cooling pump is connected to an external cooling water tank to provide cooling water for the cooling pipe to cool the vacuum pump; the first vacuum tank and the second vacuum tank are connected to the fish suction pipe, the fish discharge pipe, the vacuum pump, and the water ring pump. Independent valves are provided at the connection points, and the vacuum pump is connected to a first pair of air pipes connected to the atmosphere, the first pair of air pipes are provided with a first valve for controlling the opening or closing of the first pair of air pipes, and the water ring pump is connected to a second pair of air pipes connected to the atmosphere, and the second pair of air pipes are provided with a second valve for controlling the opening or closing of the second pair of air pipes. The adult fish catching system provided by the present invention can improve the efficiency of adult fish catching.

Description

Technical Field

[0001] The invention relates to the field of fishing devices, and in particular to an adult fish catching system. Background Art

[0002] With the development of aquaculture, especially the use of large deep-water cages, the increase in fish catch has made fish collection difficult. Traditional manual fish collection is inefficient, time-consuming, labor-intensive, and easy to cause fish damage during the process. At the same time, long-term fish collection causes fish to swim in fear for a long time, further increasing the probability of fish damage, which cannot meet the needs of today's large-scale aquaculture equipment for efficient catching. Summary of the invention

[0003] The object of the present invention is to provide a system for catching adult fish, so as to solve the problems of low efficiency and serious damage to fish bodies in large-scale aquaculture devices in the prior art.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A system for catching adult fish, comprising:

[0006] fish suction tube, for adult fish to enter the system;

[0007] Fish drain pipe, used to drain adult fish out of the system;

[0008] The first vacuum tank is connected to the fish suction pipe and the fish discharge pipe respectively;

[0009] The second vacuum tank is connected to the fish suction pipe and the fish discharge pipe respectively;

[0010] A vacuum pump is connected to the first vacuum tank and the second vacuum tank respectively, and is used to evacuate the first vacuum tank or the second vacuum tank;

[0011] A water ring pump is connected to the first vacuum tank and the second vacuum tank respectively, and is used to input gas into the first vacuum tank or the second vacuum tank;

[0012] A cooling pump is provided with a cooling pipe, the cooling pipe surrounds the vacuum pump, and the cooling pump is connected to an external cooling water tank to provide cooling water for the cooling pipe to cool the vacuum pump;

[0013] The first vacuum tank and the second vacuum tank are connected to the fish suction pipe, the fish discharge pipe, the vacuum pump, and the water ring pump with independent valves, and the vacuum pump is connected to a first pair of air pipes connected to the atmosphere, and the first pair of air pipes is provided with a first valve for controlling the opening or closing of the first pair of air pipes, and the water ring pump is connected to a second pair of air pipes connected to the atmosphere, and the second pair of air pipes is provided with a second valve for controlling the opening or closing of the second pair of air pipes;

[0014] Start the vacuum pump and the water ring pump, the vacuum pump first evacuates the first vacuum tank, and the first vacuum tank sucks fish through the fish suction tube. At this time, open the second valve, and the gas generated by the water ring pump is sent into the atmosphere; the vacuum pump then evacuates the second vacuum tank, and the second vacuum tank sucks fish through the fish suction tube, close the second valve, and the water ring pump inflates the first vacuum tank, and the first vacuum tank is discharged; open the first valve, and the first vacuum tank can vacuum the air.

[0015] In an optional embodiment of the present application, the first vacuum tank is provided with a first low liquid level detector and a first high liquid level detector, the first low liquid level detector is used to detect the lowest liquid level set when the first vacuum tank discharges fish, and the first high liquid level detector is used to detect the highest liquid level set when the first vacuum tank sucks fish;

[0016] The second vacuum tank is provided with a second low liquid level detector and a second high liquid level detector. The second low liquid level detector is used to detect the lowest liquid level set when the second vacuum tank discharges fish, and the second high liquid level detector is used to detect the highest liquid level set when the second vacuum tank sucks fish.

[0017] In an optional embodiment of the present application, the vacuum pump is provided with a first evacuation pipe and a second evacuation pipe, the first evacuation pipe connects the vacuum pump and the first vacuum tank, the first evacuation pipe is provided with a third valve for controlling the opening or closing of the first evacuation pipe, and the second evacuation pipe is provided with a fourth valve for controlling the opening or closing of the second evacuation pipe.

[0018] In an optional embodiment of the present application, the water ring pump is provided with a first air pipe and a second air pipe, the first air pipe connecting the water ring pump and the first vacuum tank, the first air pipe is provided with a fifth valve for controlling the opening or closing of the first air pipe, the second air pipe connects the water ring pump and the second vacuum tank, and the second air pipe is provided with a sixth valve for controlling the opening or closing of the second air pipe.

[0019] In an optional embodiment of the present application, the first vacuum tube is provided with a first fish inlet pipe and a first fish outlet pipe, the first fish inlet pipe is connected to the fish suction pipe and the first vacuum tank, the first fish inlet pipe is provided with a seventh valve for controlling the opening or closing of the first fish inlet pipe, the first fish outlet pipe is connected to the fish discharge pipe and the first vacuum valve, and the first fish outlet pipe is provided with an eighth valve for controlling the opening or closing of the first fish discharge pipe.

[0020] In an optional embodiment of the present application, the second vacuum tube is provided with a second fish inlet pipe and a second fish outlet pipe, the second fish inlet pipe is connected to the fish suction pipe and the second vacuum tank, the second fish inlet pipe is provided with a ninth valve for controlling the opening or closing of the second fish inlet pipe, the second fish outlet pipe is connected to the fish discharge pipe and the second vacuum valve, and the second fish outlet pipe is provided with a tenth valve for controlling the opening or closing of the second fish discharge pipe.

[0021] In an optional embodiment of the present application, the seventh valve, the eighth valve, the ninth valve and the tenth valve are check valves, the seventh valve controls the first fish inlet pipe to open from the fish suction pipe to the first vacuum tank, the eighth valve controls the first fish outlet pipe to open from the first vacuum tank to the fish discharge pipe, the ninth valve controls the second fish inlet pipe to open from the fish suction pipe to the second vacuum tank, and the tenth valve controls the second fish outlet pipe to open from the second vacuum tank to the fish discharge pipe.

[0022] In an optional embodiment of the present application, the adult fish catching system also includes an air compressor and an air bottle, the air bottle provides a gas suction and release space for the air compressor, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are electromagnetic pneumatic valves, and the air compressor controls the opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve.

[0023] In an optional embodiment of the present application, the adult fish catching system further comprises:

[0024] The fish-water separator is connected to the fish drain pipe and is used for separating the fish and water flowing out of the first vacuum tank and the second vacuum tank along the fish drain pipe.

[0025] In an optional embodiment of the present application, the adult fish catching system further comprises:

[0026] A classifier, connected to the fish-water separator, for classifying and discharging the fish separated by the fish-water separator according to set sizes;

[0027] A plurality of counters connected to the classifier for counting fish of different grades in the classifier;

[0028] A collecting bucket is connected to the classifier and is used to separately collect the fish classified by the classifier.

[0029] The beneficial effect of an adult fish catching system disclosed by the present invention is as follows: one end of the fish suction pipe is inserted into a large deep-water net cage, and a vacuum pump and a water ring pump are started, and independent valves are provided at the connection between the first vacuum tank and the second vacuum tank and the fish suction pipe, the fish discharge pipe, the vacuum pump, and the water ring pump. The vacuum pump first evacuates the first vacuum tank, and the first vacuum tank sucks fish from the large deep-water net cage through the fish suction pipe until the first vacuum tank sucks to a set liquid level, at which time the second valve is opened, and the gas generated by the water ring pump is discharged to the atmosphere through the second air pipe. The first vacuum tank sucks to a set liquid level, and the vacuum pump evacuates the second vacuum tank, and the second vacuum tank sucks fish from the large deep-water net cage through the fish suction pipe until the second vacuum tank sucks to a set liquid level, at which time the second valve is closed, and the water ring pump inflates the first vacuum tank, and due to the gas pressure, the fish in the first vacuum tank are discharged through the fish discharge pipe. Since the fish suction process of the first vacuum tank and the second vacuum tank is longer than the fish discharge process, when the first vacuum tank has finished discharging the fish, the second vacuum tank is still sucking fish. In order to keep the water ring pump started, the second valve is opened, and the water ring pump discharges gas through the second pair of air pipes. When the fish suction process is shorter than the fish discharge process, when the second vacuum tank has finished sucking the fish, the first vacuum tank is still discharging the fish. In order to keep the vacuum pump started, the first valve is opened, and the vacuum pump inhales the atmosphere through the first pair of air pipes. The vacuum pump is cooled by the cooling pump to maintain the normal operation of the vacuum pump. The adult fish catching system of the present application can keep the vacuum pump and the water ring pump working continuously, avoid damage to the pump body itself due to sudden stop and start, and keep the first vacuum tank and the second vacuum tank working continuously, so that the entire system can keep sucking and discharging fish, thereby improving the efficiency of catching adult fish. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0031] Figure 1 It is a schematic structural diagram of the adult fish catching system of the present invention.

[0032] Figure numbers: 10, first vacuum tank; 11, first high liquid level detector; 12, first low liquid level detector; 20, second vacuum tank; 21, second high liquid level detector; 22, second low liquid level detector; 30, vacuum pump; 31, third valve; 32, fourth valve; 33, first valve; 40, water ring pump; 41, fifth valve; 42, sixth valve; 43, second valve; 50, fish suction pipe; 51, seventh valve; 52, ninth valve; 60, fish discharge pipe; 61, eighth valve; 62, tenth valve; 70, air compressor; 71, air bottle; 80, fish-water separator; 81, classifier; 82, counter; 83, collection bucket. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0036] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0039] The following is combined with the appendix of this manual Figure 1 , the preferred implementation modes disclosed in the present invention are further elaborated in detail.

[0040] Please refer to Figure 1 The embodiment of the present application provides a system for catching adult fish. The system for catching adult fish provided by the embodiment of the present application can be applied to the catching of adult fish in large deep-water cages. The vacuum pump 30 and the water ring pump 40 work continuously, avoiding damage to the pump body caused by sudden stop and start, and at the same time, the first vacuum tank 10 and the second vacuum tank 20 connected in parallel continue to suck and discharge fish, effectively improving the efficiency of catching adult fish.

[0041] In an embodiment of the present application, a system for catching adult fish includes:

[0042] A fish suction tube 50, used for adult fish to enter the system;

[0043] A fish discharge pipe 60, used to discharge adult fish from the system;

[0044] The first vacuum tank 10 is connected to the fish suction pipe 50 and the fish discharge pipe 60 respectively;

[0045] The second vacuum tank 20 is connected to the fish suction pipe 50 and the fish discharge pipe 60 respectively;

[0046] A vacuum pump 30, connected to the first vacuum tank 10 and the second vacuum tank 20, respectively, for evacuating the first vacuum tank 10 or the second vacuum tank 20;

[0047] The water ring pump 40 is connected to the first vacuum tank 10 and the second vacuum tank 20 respectively, and is used to input gas into the first vacuum tank 10 or the second vacuum tank 20;

[0048] A cooling pump is provided with a cooling pipe, the cooling pipe surrounds the vacuum pump 30, and the cooling pump is connected to an external cooling water tank to provide cooling water for the cooling pipe to cool the vacuum pump 30;

[0049] Independent valves are provided at the connection places of the first vacuum tank 10 and the second vacuum tank 20 with the fish suction pipe 50, the fish discharge pipe 60, the vacuum pump 30 and the water ring pump 40, and the vacuum pump 30 is connected with a first pair of air pipes communicating with the atmosphere, the first pair of air pipes is provided with a first valve 33 for controlling the opening or closing of the first pair of air pipes, and the water ring pump 40 is connected with a second pair of air pipes communicating with the atmosphere, the second pair of air pipes is provided with a second valve 43 for controlling the opening or closing of the second pair of air pipes;

[0050] Start the vacuum pump 30 and the water ring pump 40, the vacuum pump 30 first evacuates the first vacuum tank 10, the first vacuum tank 10 sucks fish through the fish suction pipe 50, at this time, open the second valve 43, and the gas generated by the water ring pump 40 is sent into the atmosphere; the vacuum pump 30 then evacuates the second vacuum tank 20, the second vacuum tank 20 sucks fish through the fish suction pipe 50, close the second valve 43, the water ring pump 40 inflates the first vacuum tank 10, and the first vacuum tank 10 discharges fish; open the first valve 33, the first vacuum tank 10 can vacuum the air.

[0051] The first vacuum tank 10 is provided with a first low liquid level detector 12 and a first high liquid level detector 11. The first low liquid level detector 12 is used to detect the lowest liquid level set when the first vacuum tank 10 discharges fish, and the first high liquid level detector 11 is used to detect the highest liquid level set when the first vacuum tank 10 sucks fish.

[0052] The second vacuum tank 20 is provided with a second low liquid level detector 22 and a second high liquid level detector 21. The second low liquid level detector 22 is used to detect the lowest liquid level set when the second vacuum tank 20 discharges fish, and the second high liquid level detector 21 is used to detect the highest liquid level set when the second vacuum tank 20 sucks fish.

[0053] The first low liquid level detector 12 and the second low liquid level detector 22 trigger the fish suction process, and the first high liquid level detector 11 and the second high liquid level detector 21 trigger the fish discharge process.

[0054] The vacuum pump 30 is provided with a first evacuation pipe and a second evacuation pipe, the first evacuation pipe connects the vacuum pump 30 and the first vacuum tank 10, the first evacuation pipe is provided with a third valve 31 for controlling the opening or closing of the first evacuation pipe, and the second evacuation pipe is provided with a fourth valve 32 for controlling the opening or closing of the second evacuation pipe.

[0055] The water ring pump 40 is provided with a first air pipe and a second air pipe, the first air pipe connects the water ring pump 40 and the first vacuum tank 10, the first air pipe is provided with a fifth valve 41 for controlling the opening or closing of the first air pipe, the second air pipe connects the water ring pump 40 and the second vacuum tank 20, and the second air pipe is provided with a sixth valve 42 for controlling the opening or closing of the second air pipe.

[0056] The first vacuum tube is provided with a first fish inlet pipe and a first fish outlet pipe, the first fish inlet pipe is connected to the fish suction pipe 50 and the first vacuum tank 10, the first fish inlet pipe is provided with a seventh valve 51 for controlling the first fish inlet pipe to be opened or closed, the first fish outlet pipe is connected to the fish discharge pipe 60 and the first vacuum valve, and the first fish outlet pipe is provided with an eighth valve 61 for controlling the first fish discharge pipe 60 to be opened or closed.

[0057] The second vacuum tube is provided with a second fish inlet pipe and a second fish outlet pipe, the second fish inlet pipe is connected to the fish suction pipe 50 and the second vacuum tank 20, the second fish inlet pipe is provided with a ninth valve 52 for controlling the second fish inlet pipe to be opened or closed, the second fish outlet pipe is connected to the fish discharge pipe 60 and the second vacuum valve, and the second fish outlet pipe is provided with a tenth valve 62 for controlling the second fish discharge pipe 60 to be opened or closed.

[0058] Start the vacuum pump 30 and the water ring pump 40, close the first valve 33, open the third valve 31 and the seventh valve 51, close the eighth valve 61 and the fifth valve 41, the vacuum pump 30 evacuates the first vacuum tank 10, and the first vacuum tank 10 sucks fish through the fish suction pipe 50. Open the second valve 43, close the fourth valve 32, the sixth valve 42, the ninth valve 52 and the tenth valve 62, and the gas generated by the water ring pump 40 is discharged into the atmosphere through the second pair of air pipes.

[0059] When the first high liquid level detector 11 is triggered, the second valve 43, the third valve 31 and the seventh valve 51 are closed, the fifth valve 41 and the eighth valve 61 are opened, the water ring pump 40 inflates the first vacuum tank 10, and the first vacuum tank 10 discharges fish through the fish discharge pipe 60. The fourth valve 32 and the ninth valve 52 are opened, the sixth valve 42 and the tenth valve 62 are closed, the vacuum pump 30 evacuates the second vacuum tank 20, and the second vacuum tank 20 sucks fish through the fish suction pipe 50.

[0060] When the first low liquid level detector 12 is triggered, the third valve 31 and the seventh valve 51 are opened, the eighth valve 61 and the fifth valve 41 are closed, and the vacuum pump 30 again sucks fish from the first vacuum tank 10. When the second high liquid level detector 21 is triggered, the sixth valve 42 and the tenth valve 62 are opened, the fourth valve 32 and the ninth valve 52 are closed, and the water ring pump 40 discharges fish from the second vacuum tank 20.

[0061] The first vacuum tank 10 and the second vacuum tank 20 continuously suck and discharge fish. When the times of sucking and discharging fish of the first vacuum tank 10 and the second vacuum tank 20 are inconsistent, the vacuum pump 30 can be idled through the first valve 33, and the water ring pump 40 can be idled through the second valve 43, so that the speeds of sucking and discharging fish of the first vacuum tank 10 and the second vacuum tank 20 are balanced.

[0062] The seventh valve 51, the eighth valve 61, the ninth valve 52 and the tenth valve 62 are check valves. The seventh valve 51 controls the first fish inlet pipe to open from the fish suction pipe 50 to the first vacuum tank 10, the eighth valve 61 controls the first fish outlet pipe to open from the first vacuum tank 10 to the fish discharge pipe 60, the ninth valve 52 controls the second fish inlet pipe to open from the fish suction pipe 50 to the second vacuum tank 20, and the tenth valve 62 controls the second fish outlet pipe to open from the second vacuum tank 20 to the fish discharge pipe 60.

[0063] The adult fish catching system further includes an air compressor 70 and an air bottle 71. The air bottle 71 provides a gas suction and discharge space for the air compressor 70. The first valve 33, the second valve 43, the third valve 31, the fourth valve 32, the fifth valve 41 and the sixth valve 42 are electromagnetic pneumatic valves. The air compressor 70 controls the opening and closing of the first valve 33, the second valve 43, the third valve 31, the fourth valve 32, the fifth valve 41 and the sixth valve 42. An automatic control can be realized.

[0064] The grow-out system also includes:

[0065] The fish-water separator 80 is connected to the fish drain pipe 60 and is used to separate the fish and water flowing out of the first vacuum tank 10 and the second vacuum tank 20 along the fish drain pipe 60. The fish-water separator 80 separates the water from the fish, and the water flows back to the large deep-water cage.

[0066] The grow-out system also includes:

[0067] The classifier 81 is connected to the fish-water separator 80 and is used to classify and discharge the fish separated by the fish-water separator 80 according to the set size;

[0068] A plurality of counters 82 connected to the classifier 81 for counting fish of different grades in the classifier 81;

[0069] The collecting bucket 83 is connected to the classifier 81 and is used to separately collect the fish classified by the classifier 81 .

[0070] The beneficial effect of the adult fish catching system disclosed in the present invention is: one end of the fish suction pipe 50 is inserted into a large deep-water net cage, the vacuum pump 30 and the water ring pump 40 are started, and the independent valves are arranged at the connection between the first vacuum tank 10 and the second vacuum tank 20 and the fish suction pipe 50, the fish discharge pipe 60, the vacuum pump 30, and the water ring pump 40. The vacuum pump 30 first evacuates the first vacuum tank 10, and the first vacuum tank 10 sucks fish from the large deep-water net cage through the fish suction pipe 50 until the first vacuum tank 10 sucks to the set liquid level, at which time the second valve 43 is opened, and the gas generated by the water ring pump 40 is discharged to the atmosphere through the second pair of air pipes. The first vacuum tank 10 sucks to the set liquid level, and the vacuum pump 30 evacuates the second vacuum tank 20. The second vacuum tank 20 sucks fish from the large deep-water net cage through the fish suction pipe 50 until the second vacuum tank 20 sucks to the set liquid level. At this time, the second valve 43 is closed, and the water ring pump 40 inflates the first vacuum tank 10. Due to the gas pressure, the fish in the first vacuum tank 10 are discharged through the fish discharge pipe 60. Since the fish suction process of the first vacuum tank 10 and the second vacuum tank 20 is longer than the fish discharge process, when the first vacuum tank 10 has finished discharging the fish, the second vacuum tank 20 is still sucking the fish. In order to keep the water ring pump 40 started, the second valve 43 is opened, and the water ring pump 40 discharges gas through the second pair of air pipes. When the fish suction process is shorter than the fish discharge process, when the second vacuum tank 20 has finished sucking the fish, the first vacuum tank 10 is still discharging the fish. In order to keep the vacuum pump 30 started, the first valve 33 is opened, and the vacuum pump 30 sucks the atmosphere through the first pair of air pipes. The vacuum pump 30 is cooled by a cooling pump to maintain the normal operation of the vacuum pump 30. The adult fish catching system of the present application can maintain the continuous operation of the vacuum pump 30 and the water ring pump 40, avoiding damage to the pump body itself due to sudden stop and start, while allowing the first vacuum tank 10 and the second vacuum tank 20 to maintain continuous operation, allowing the entire system to keep sucking and discharging fish, thereby improving the efficiency of catching adult fish.

[0071] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0072] Although the present disclosure has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present disclosure can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A system for catching adult fish, characterized in that: include: fish suction tube, for adult fish to enter the system; Fish drain pipe, used to drain adult fish out of the system; The first vacuum tank is connected to the fish suction pipe and the fish discharge pipe respectively; The second vacuum tank is connected to the fish suction pipe and the fish discharge pipe respectively; A vacuum pump is connected to the first vacuum tank and the second vacuum tank respectively, and is used to evacuate the first vacuum tank or the second vacuum tank; A water ring pump is connected to the first vacuum tank and the second vacuum tank respectively, and is used to input gas into the first vacuum tank or the second vacuum tank; A cooling pump is provided with a cooling pipe, the cooling pipe surrounds the vacuum pump, and the cooling pump is connected to an external cooling water tank to provide cooling water for the cooling pipe to cool the vacuum pump; The first vacuum tank and the second vacuum tank are connected to the fish suction pipe, the fish discharge pipe, the vacuum pump, and the water ring pump with independent valves, and the vacuum pump is connected to a first pair of air pipes connected to the atmosphere, and the first pair of air pipes is provided with a first valve for controlling the opening or closing of the first pair of air pipes, and the water ring pump is connected to a second pair of air pipes connected to the atmosphere, and the second pair of air pipes is provided with a second valve for controlling the opening or closing of the second pair of air pipes; The vacuum pump and the water ring pump are started, the vacuum pump first evacuates the first vacuum tank, the first vacuum tank sucks fish through the fish suction pipe, and the second valve is opened at this time, and the gas generated by the water ring pump is sent into the atmosphere; the vacuum pump then evacuates the second vacuum tank, the second vacuum tank sucks fish through the fish suction pipe, and the second valve is closed, the water ring pump inflates the first vacuum tank, and the first vacuum tank discharges fish; Open the first valve, and the first vacuum tank can vacuum the air; The first vacuum tank is provided with a first low liquid level detector and a first high liquid level detector, the first low liquid level detector is used to detect the lowest liquid level set when the first vacuum tank discharges fish, and the first high liquid level detector is used to detect the highest liquid level set when the first vacuum tank sucks fish; The second vacuum tank is provided with a second low liquid level detector and a second high liquid level detector, the second low liquid level detector is used to detect the lowest liquid level set when the second vacuum tank discharges fish, and the second high liquid level detector is used to detect the highest liquid level set when the second vacuum tank sucks fish; The vacuum pump is provided with a first evacuation pipe and a second evacuation pipe, the first evacuation pipe is connected with the vacuum pump and the first vacuum tank, the first evacuation pipe is provided with a third valve for controlling the opening or closing of the first evacuation pipe, and the second evacuation pipe is provided with a fourth valve for controlling the opening or closing of the second evacuation pipe; The water ring pump is provided with a first air pipe and a second air pipe, the first air pipe is connected with the water ring pump and the first vacuum tank, the first air pipe is provided with a fifth valve for controlling the opening or closing of the first air pipe, the second air pipe is connected with the water ring pump and the second vacuum tank, and the second air pipe is provided with a sixth valve for controlling the opening or closing of the second air pipe.

2. The system for catching adult fish according to claim 1, characterized in that: The first vacuum tank is provided with a first fish inlet pipe and a first fish outlet pipe, the first fish inlet pipe is connected to the fish suction pipe and the first vacuum tank, the first fish inlet pipe is provided with a seventh valve for controlling the opening or closing of the first fish inlet pipe, the first fish outlet pipe is connected to the fish discharge pipe and the first vacuum valve, and the first fish outlet pipe is provided with an eighth valve for controlling the opening or closing of the first fish discharge pipe.

3. The system for catching adult fish according to claim 2, characterized in that: The second vacuum tank is provided with a second fish inlet pipe and a second fish outlet pipe, the second fish inlet pipe is connected to the fish suction pipe and the second vacuum tank, the second fish inlet pipe is provided with a ninth valve for controlling the opening or closing of the second fish inlet pipe, the second fish outlet pipe is connected to the fish discharge pipe and the second vacuum valve, and the second fish outlet pipe is provided with a tenth valve for controlling the opening or closing of the second fish discharge pipe.

4. The system for catching adult fish according to claim 3, characterized in that: The seventh valve, the eighth valve, the ninth valve and the tenth valve are check valves. The seventh valve controls the first fish inlet pipe to open from the fish suction pipe to the first vacuum tank, the eighth valve controls the first fish outlet pipe to open from the first vacuum tank to the fish discharge pipe, the ninth valve controls the second fish inlet pipe to open from the fish suction pipe to the second vacuum tank, and the tenth valve controls the second fish outlet pipe to open from the second vacuum tank to the fish discharge pipe.

5. The system for catching adult fish according to any one of claims 1 to 3, characterized in that: It also includes an air compressor and an air bottle, the air bottle provides a gas suction and release space for the air compressor, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are electromagnetic pneumatic valves, and the air compressor controls the opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve.

6. The system for catching adult fish according to any one of claims 1 to 3, characterized in that: Also includes: The fish-water separator is connected to the fish drain pipe and is used for separating the fish and water flowing out of the first vacuum tank and the second vacuum tank along the fish drain pipe.

7. The system for catching adult fish according to claim 6, characterized in that: Also includes: A classifier, connected to the fish-water separator, for classifying and discharging the fish separated by the fish-water separator according to set sizes; A plurality of counters connected to the classifier for counting fish of different grades in the classifier; A collecting bucket is connected to the classifier and is used to separately collect the fish classified by the classifier.

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