An automatic fish suction method

Abstract

The present invention relates to the technical field of fish farming equipment, and in particular to an automatic fish suction method, comprising: S1, preparation; S2, priming a pump; S3, starting a centrifugal pump and sucking fish; S4, draining the fish; S5, repeating steps S2-S4 to achieve uninterrupted fish suction and draining, and after completion, closing the centrifugal pump, the vacuum pump, and all valves. The present invention can adopt ordinary centrifugal pumps and vacuum pumps, reducing mechanical research and development costs. During the entire fish suction and draining process, the fish do not pass through the running centrifugal pump, thereby avoiding mechanical damage. When the fish enter a fish collecting tank, since the water body below the fish inlet and outlet in the fish collecting tank is slightly disturbed, the fish can be naturally distributed in the fish collecting tank, avoiding damage caused by friction and collision between the fish. The operation is simple, flexible, and highly controllable.

Description

Technical Field

[0001] The present invention relates to the technical field of fishery breeding equipment, in particular to an automatic fish suction method. Background Art

[0002] As a modern fishery equipment, fish suction pump plays an important role in the fish catching process and has been widely used at home and abroad.

[0003] Currently, there are three main types of fish suction pumps used worldwide: centrifugal, vacuum, and jet. The advantage of centrifugal fish suction pumps is their high efficiency. However, their disadvantages are that they require special pump structure and, because the fish must pass through high-speed moving parts, they have a high fish loss rate and are not suitable for pumping large live fish. The advantage of vacuum fish suction pumps is their simple structure, as the fish do not pass through moving parts. However, their disadvantages are low efficiency, and the high-speed water mixed with fish entering the fish collection drum will cause severe disturbances in the water inside, increasing the chance of fish damage due to friction and collision. Jet fish suction pumps have high energy consumption, lower efficiency, and are therefore less commonly used.

[0004] Therefore, how to ensure that the fish body is not damaged and the efficiency is high at the same time has become a technical problem that needs to be solved urgently in the field of fish suction pumps. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides an automatic fish suction method which is simple to operate, does not damage the fish body, and has high working efficiency.

[0006] The present invention provides an automatic fish sucking method, comprising the following steps:

[0007] S1. Preparation:

[0008] The fish collecting tank is immersed in the fish-water mixture by immersing the fish suction pipe, the fish collecting tank is connected to the water inlet pipe of the centrifugal pump, the water outlet pipe of the centrifugal pump is connected to the air inlet pipe of the vacuum pump, and the exhaust valve on the air outlet pipe of the vacuum pump that is connected to the outside atmosphere is opened;

[0009] S2. Prime the pump:

[0010] Starting the vacuum pump, water or fish-water mixture enters the fish collecting tank through the fish inlet pipe. After the fish collecting tank is full, the water enters the water inlet pipe, the centrifugal pump, and the water outlet pipe in sequence through the water outlet above the fish collecting tank.

[0011] S3. Start the centrifugal pump and suck fish:

[0012] When the water level in the water outlet pipe reaches a certain height, the centrifugal pump is started, the passage between the water outlet pipe of the centrifugal pump and the air inlet pipe of the vacuum pump is disconnected, the shut-off valve between the water outlet pipe and the external water body is opened, and the air extraction valve connecting the air inlet pipe of the vacuum pump with the outside is opened, so that the water in the fish collecting tank is discharged into the external water body through the water inlet pipe, the centrifugal pump, and the water outlet pipe in sequence;

[0013] S4. Fish shavings:

[0014] After the centrifugal pump has been running for a certain period of time, the centrifugal pump is turned off to connect the fish collecting tank to the outside atmosphere, and a fish discharge valve on a fish discharge pipe at the bottom of the fish collecting tank is opened. After all the fish water in the fish collecting tank is discharged, the fish discharge valve is closed to block the connection between the fish collecting tank and the outside atmosphere.

[0015] S5. Repeat steps S2-S4 to achieve uninterrupted fish suction and discharge. After completion, close the centrifugal pump, the vacuum pump, and all valves.

[0016] The automatic fish suction method of the present technical solution can use an ordinary centrifugal pump and a vacuum pump, which reduces the cost of mechanical research and development. During the entire process of sucking and draining fish, the fish do not pass through the running machinery, thus avoiding mechanical damage. When the fish enter the fish collecting tank, since the water body below the fish inlet and outlet in the fish collecting tank is disturbed very little, the fish can be naturally distributed in the fish collecting tank, thus avoiding damage caused by friction and collision between the fish. The operation is simple, flexible and highly controllable.

[0017] In some embodiments of the present application, when the height of the fish receiving pond is higher than the height of the fish discharge port of the fish collecting tank, the fish collecting tank needs to be pressurized so that the fish are discharged into the fish receiving pond located at a higher place under pressure when rushing out of the fish discharge pipe. In step S4, after the centrifugal pump has run for a certain period of time, the centrifugal pump is turned off, the fish discharge valve on the fish discharge pipe is opened, and the fish collecting tank is pressurized so that the fish in the fish collecting tank are discharged into the fish receiving pond at a height higher than the fish discharge port of the fish collecting tank under the action of pressure. After one fish discharge operation is completed, the fish discharge valve is closed and the fish collecting tank is stopped from being pressurized. Steps S2-S4 are repeated to achieve uninterrupted fish suction and discharge of fish to a higher place.

[0018] In some embodiments of the present application, in step S4, the fish collecting tank is pressurized by the vacuum pump. Specifically, after the centrifugal pump is turned off and the fish drain valve is opened, the air outlet pipe of the vacuum pump is connected to the fish collecting tank, the exhaust valve on the air outlet pipe of the vacuum pump is closed, and the fish inlet valve on the fish suction pipe is closed. The vacuum pump draws air from the outside atmosphere through the air extraction valve, the air inlet pipe, the vacuum pump, and the air outlet pipe in sequence into the fish collecting tank to pressurize the fish water in the fish collecting tank.

[0019] In some embodiments of the present application, in step S3, the start-up of the centrifugal pump is controlled by a liquid level switch provided on the water outlet pipe. When the water level in the water outlet pipe reaches the height of the liquid level switch, the liquid level switch is triggered to start the centrifugal pump.

[0020] In some embodiments of the present application, a regulating valve is further provided on the water outlet pipe of the centrifugal pump, and the fish suction speed is adjusted by adjusting the opening of the regulating valve.

[0021] In some embodiments of the present application, a deceleration component capable of reducing the speed of the fish-water mixture is provided in the fish collecting tank, the deceleration component includes a fish inlet pipe and a fish inlet outlet located at the top of the fish inlet pipe, the fish inlet outlet is a trumpet-shaped structure with a narrow lower part and a wide upper part, and the speed of the fish can be reduced when the fish passes through the fish inlet outlet to prevent the fish from colliding with the inner wall of the fish collecting tank and causing damage, the bottom of the fish inlet pipe is connected to the fish suction port of the fish collecting tank, and the fish suction port is connected to the fish suction pipe, and the fish enter the fish collecting tank through the fish suction pipe, the fish suction port, the fish inlet pipe, and the fish inlet outlet; the bottom of the fish collecting tank is elliptical, dish-shaped or conical, which is convenient for discharging fish and water inside the fish collecting tank.

[0022] In some embodiments of the present application, a water outlet is provided above the fish collecting tank, and a fish blocking component is provided below the water outlet, and the fish blocking component prevents fish from entering the centrifugal pump from the water outlet.

[0023] In some embodiments of the present application, a ventilation pipe connected to the outside atmosphere is further provided above the fish collecting tank, and a ventilation valve is provided on the ventilation pipe, and the ventilation valve controls the connection and disconnection between the fish collecting tank and the outside atmosphere. A pressure-discharge valve is provided on the connecting pipeline between the ventilation pipe and the outlet pipe of the vacuum pump, and when the pressure-discharge valve is opened, the vacuum pump inflates and pressurizes the fish collecting tank.

[0024] In some embodiments of the present application, a fish suction valve is provided on the fish suction pipe, and a fish discharge valve is provided on the fish discharge pipe; a shut-off valve is provided on the water outlet pipe of the centrifugal pump, an exhaust valve is provided on the air inlet pipe of the vacuum pump for controlling the air inlet pipe to suck air from the outside, and an exhaust valve is provided on the air outlet pipe of the vacuum pump for controlling the air outlet pipe to exhaust air to the outside.

[0025] In some embodiments of the present application, the centrifugal pump, the vacuum pump, the shut-off valve, the vent valve, the pressure-discharge valve, the air extraction valve, the exhaust valve, the fish discharge valve, and the fish inlet valve are connected to the control cabinet signal and are controlled by the linkage of the control cabinet.

[0026] Based on the above technical solution, the automatic fish suction method of the present invention can use an ordinary centrifugal pump and a vacuum pump, thereby reducing the cost of mechanical research and development. During the entire fish suction and discharge process, the fish do not pass through the running centrifugal pump, thereby avoiding mechanical damage. When the fish enter the fish collection tank, the water body below the fish inlet and outlet of the fish collection tank is slightly disturbed, so the fish can be naturally distributed in the fish collection tank, thereby avoiding damage caused by friction and collision between the fish. The operation is simple, flexible, and highly controllable.

[0027] The setting of the speed reduction component reduces the speed of fish when they enter the fish collecting tank, preventing the fish from colliding with the inner wall of the fish collecting tank and causing damage;

[0028] According to the actual working conditions, the fish suction speed of the system can be changed by changing the opening of the regulating valve, and the single fish suction time can also be adjusted, with flexible operation and great flexibility;

[0029] The entire fish suction and discharge process is highly automated and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 Schematic diagram of the structure of the automatic fish suction system in an embodiment of the present invention;

[0032] Figure 2 Schematic diagram of gas flow during the pump filling process according to an embodiment of the present invention;

[0033] Figure 3 Schematic diagram of the flow of gas and water during the fish suction process in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of gas flow when discharging fish to a higher place according to another embodiment of the present invention.

[0035] In the figure,

[0036] 10. Fish collecting tank; 11. Air vent; 111. Air pipe; 112. Air valve; 12. Water outlet; 121. Fish blocking component; 13. Fish suction port; 131. Fish inlet valve; 132. Fish suction pipe; 14. Fish discharge port; 141. Fish discharge valve; 142. Fish discharge pipe; 15. Speed reduction component; 151. Fish inlet pipe; 152. Fish inlet and outlet; 20. Centrifugal pump; 21. Water inlet pipe; 22. Water outlet pipe; 223. Shut-off valve; 23. First pipeline; 24. Liquid level switch; 25. Control valve; 30. Vacuum pump; 31. Air outlet pipe; 311. Exhaust valve; 312. Pressure discharge valve; 32. Air inlet pipe; 321. Air extraction valve; 322. Vacuum valve; 33. Second pipeline. DETAILED DESCRIPTION

[0037] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "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 accompanying 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0039] The terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of such features.

[0040] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] The automatic fish suction method in this embodiment is applicable to Figure 1 The automatic fish suction system shown in Figure 1 is as follows. Figure 1 As shown, the automatic fish suction system comprises:

[0042] The fish collecting tank 10 is a sealed cavity capable of accommodating fish and water. A water outlet 12 and a vent 11 are provided on the top of the fish collecting tank 10, and a fish suction port 13 and a fish discharge port 14 are provided on the bottom. The fish suction port 13 is connected to a fish suction pipe 132, and the fish discharge port 14 is connected to a fish discharge pipe 142.

[0043] a centrifugal pump 20, wherein a water inlet pipe 21 of the centrifugal pump 20 is connected to the water outlet 12 of the fish collecting tank 10, and a water outlet pipe 22 of the centrifugal pump 20 extends to an external water body. The centrifugal pump 20 is used to pump water from the fish collecting tank 10 and discharge it to the external water body;

[0044] A vacuum pump 30, an air outlet pipe 31 of the vacuum pump 30 is connected to the air vent 11 of the fish collecting tank 10, and the vacuum pump 30 extracts air from the fish collecting tank 10 or inflates and pressurizes the fish collecting tank 10;

[0045] The air inlet pipe 32 of the vacuum pump 30 is connected to the water outlet pipe 22 of the centrifugal pump 20 through the first pipe 23, and the first pipe 23 is provided with an evacuation valve 322 for controlling the on-off of the first pipe 23. The water outlet pipe 22 of the centrifugal pump 20 is also provided with a liquid level switch 24. When the evacuation valve 322 is opened, the vacuum pump 30 is started, and the air in the fish collecting tank 10 passes through the water outlet 12, the water inlet pipe 21, the centrifugal pump 20, the water outlet pipe 22, the first pipe 23, the air inlet pipe 32, the vacuum pump 3 0, the air outlet pipe 31 is discharged into the outside atmosphere. As the air in the fish collecting tank 10 gradually decreases, the fish-water mixture enters the fish collecting tank 10 from the fish suction port. When the air in the fish collecting tank 10 is completely discharged and the fish-water mixture in the fish collecting tank 10 is full, as the vacuum pump 30 continues to pump air, the water in the fish collecting tank 10 will pass through the water outlet 12, the water inlet pipe 21, and the centrifugal pump 20 in sequence and enter the water outlet pipe 22. When the water level in the water outlet pipe 22 reaches the liquid level switch 24, the centrifugal pump 20 is triggered to start.

[0046] A regulating valve 25 is also provided on the outlet pipe 22 of the centrifugal pump 20. The fish suction speed is changed by changing the opening of the regulating valve 25. In this embodiment, the regulating valve 25 is a manual regulating valve. The valve opening can be manually adjusted according to the actual working conditions to adjust the water outlet speed of the outlet pipe 22 and thus adjust the fish suction speed.

[0047] In order to avoid fish damage during the suction process, a deceleration component 15 is provided in the fish collecting tank 10. The deceleration component 15 includes a fish inlet pipe 151 and a fish inlet outlet 152 located at the top of the fish inlet pipe 151. Figure 1 As shown, the fish inlet pipe 151 includes a curved pipe connected to the fish suction port 13 and a straight pipe extending vertically upward above the curved pipe. The curved pipe is preferably a 45° curved pipe or a curved pipe with a large curvature radius; the fish inlet and outlet 152 is fixed to the top of the straight pipe, and the fish inlet and outlet 152 is a trumpet-shaped structure with a narrow lower portion and a wide upper portion. The fish-water mixture passes through the fish suction port 13, the fish inlet pipe 151, and the fish inlet and outlet 152 in sequence to enter the fish collecting tank 10. When the fish passes through the fish inlet and outlet 152, the speed of the fish-water mixture gradually decreases due to the gradual increase in the diameter of the fish inlet and outlet 152, which can prevent the fish from colliding with the inner wall of the fish collecting tank 10 and causing damage.

[0048] A fish blocking component 121 is provided below the water outlet 12 of the fish collecting tank 10 . The fish blocking component 121 prevents fish from entering the centrifugal pump 20 from the water outlet. In this embodiment, the fish blocking component 121 is a fish blocking net.

[0049] In order to facilitate the fish collecting tank 10 to smoothly discharge fish into the lower fish receiving pond, the air vent 11 above the fish collecting tank 10 is connected to a vent pipe 111 connected to the outside atmosphere, and a vent valve 112 is provided on the vent pipe 111. The vent valve 112 controls the connection and disconnection between the fish collecting tank 10 and the outside atmosphere. A pressure discharge valve 312 is provided on the second pipeline 33 connecting the vent pipe 111 and the air outlet pipe 31 of the vacuum pump 30. When the pressure discharge valve 312 is opened, the vacuum pump 30 inflates and pressurizes the fish collecting tank 10.

[0050] A shut-off valve 223 is provided on the water outlet pipe 22 of the centrifugal pump 20, an air inlet pipe 32 of the vacuum pump 30 is provided with an air extraction valve 321 for controlling the air inlet pipe 32 to suck air from the outside, and an air outlet pipe 31 of the vacuum pump 30 is provided with an exhaust valve 311 for controlling the air outlet pipe 31 to exhaust air to the outside; the fish suction pipe 132 is provided with a fish suction valve 131, and the fish discharge pipe 142 is provided with a fish discharge valve 141.

[0051] As an embodiment of the present invention, when the fish receiving pond is located below the fish collecting tank, the method of using the above-mentioned automatic fish suction system to suck fish includes the following steps:

[0052] S1. Preparation:

[0053] Immerse the fish suction pipe 132 of the fish collecting tank 10 in the fish-water mixture, open the fish inlet valve 131, connect the water outlet 12 of the fish collecting tank 10 to the water inlet pipe 21 of the centrifugal pump 20, adjust the regulating valve 25 to be fully open, close the pressure discharge valve 312 on the second pipeline 33, open the evacuation valve 322 on the first pipeline 23, so that the water outlet pipe 22 of the centrifugal pump 20 is connected to the air inlet pipe 32 of the vacuum pump 30, open the exhaust valve 311 on the air outlet pipe 31 of the vacuum pump 30 that is connected to the outside atmosphere, and close the other valves;

[0054] S2. Prime the pump:

[0055] Start the vacuum pump 30, as Figure 2 As shown, the air in the fish collecting tank 10 is discharged into the outside atmosphere through the water outlet 12, the water inlet pipe 21, the centrifugal pump 20, the water outlet pipe 22, the first pipeline 23, the air inlet pipe 32, the vacuum pump 30, and the air outlet pipe 31 in sequence. As the air in the fish collecting tank 10 gradually decreases, the pressure in the fish collecting tank 10 becomes increasingly lower, and water or a fish-water mixture enters the fish collecting tank 10 through the fish suction pipe 132, the fish suction port 13, and the speed reduction component 15. When the air in the fish collecting tank 10 is completely discharged and the fish-water mixture fills the fish collecting tank 10, water enters the water inlet pipe 21, the centrifugal pump 20, and the water outlet pipe 22 in sequence through the water outlet 12 at the top of the fish collecting tank 10.

[0056] S3. Start the centrifugal pump to suck fish:

[0057] When the water level in the outlet pipe 22 reaches the height where the liquid level switch 24 is located, the liquid level switch 24 transmits a signal to a control cabinet (not shown in the figure), which starts the centrifugal pump 20, closes the evacuation valve 322, disconnects the outlet pipe 22 of the centrifugal pump 20 from the air inlet pipe 32 of the vacuum pump 30, opens the air evacuation valve 321 connecting the air inlet pipe 32 of the vacuum pump 30 to the outside world, and opens the shut-off valve 223 between the outlet pipe 22 and the external water body, thereby allowing the water in the fish collecting tank 10 to be discharged from the outlet pipe 22 of the centrifugal pump 20.

[0058] The water in the fish collecting tank 10 is discharged into the external water body through the water inlet pipe 21, the centrifugal pump 20 and the water outlet pipe 22 in sequence; Figure 3 (thin arrow); since the centrifugal pump 20 is always working, the water in the fish collecting tank 10 is continuously discharged to the external water body, and the fish-water mixture is always along the fish suction pipe 132, the fish suction port 13, and the speed reduction component 15 into the fish collecting tank 10, thereby achieving the fish suction operation; at this time, the vacuum pump 30 is in working state, but the air sucked in by the air extraction valve 321 enters the vacuum pump 30 through the air inlet pipe 32, and is discharged into the atmosphere through the air outlet pipe 31 and the exhaust valve 311, as shown in FIG. Figure 3 (thick arrow) shows that it does not participate in the fish suction operation.

[0059] During the fish suction process, when the fish pass through the fish inlet 152 of the deceleration component 15, the speed of the fish-water mixture gradually decreases due to the gradual increase in the diameter of the fish inlet 152, which can prevent the fish from colliding with the inner wall of the fish collecting tank 10 and causing damage.

[0060] S4. Fish shavings:

[0061] After the centrifugal pump 20 has been running for a certain period of time, when there are many fish in the fish collecting tank 10, the centrifugal pump 20 is turned off, the vent valve 112 is opened to connect the fish collecting tank 10 with the outside atmosphere, and the fish discharge valve 141 on the fish discharge pipe 142 at the bottom of the fish collecting tank 10 is opened. Under the action of its own gravity, the fish water in the fish collecting tank 10 flows along the fish discharge port 14 and the fish discharge pipe 142 into the fish receiving pool located below. After the fish water in the fish collecting tank 10 is completely discharged, the fish discharge valve 141 is closed, and the vent valve 112 is closed to block the connection between the fish collecting tank and the outside atmosphere. Thus, one fish suction and fish discharge process is completed.

[0062] S5, repeat steps S2-S4 to achieve uninterrupted fish suction and fish discharge to the lower part. After completion, close the centrifugal pump 20, vacuum pump 30, and all valves.

[0063] As another embodiment of the present invention, when the receiving fish pond exceeds a certain height of the fish discharge port 14 of the fish collecting tank 10, the fish water cannot be discharged into the receiving fish pond under the action of its own gravity. Therefore, when the receiving fish pond is at a high place, a method for sucking fish using the above-mentioned automatic fish suction system includes the following steps:

[0064] S1. Preparation:

[0065] Immerse the fish suction pipe 132 of the fish collecting tank 10 in the fish-water mixture, open the fish inlet valve 131, connect the water outlet 12 of the fish collecting tank 10 to the water inlet pipe 21 of the centrifugal pump 20, adjust the regulating valve 25 to be fully open, close the pressure discharge valve 312 on the second pipeline 33, open the evacuation valve 322 on the first pipeline 23, so that the water outlet pipe 22 of the centrifugal pump 20 is connected to the air inlet pipe 32 of the vacuum pump 30, open the exhaust valve 311 on the air outlet pipe 31 of the vacuum pump 30 that is connected to the outside atmosphere, and close the other valves;

[0066] S2. Prime the pump:

[0067] Start the vacuum pump 30, as Figure 2 As shown, the air in the fish collecting tank 10 is discharged into the outside atmosphere through the water outlet 12, the water inlet pipe 21, the centrifugal pump 20, the water outlet pipe 22, the first pipeline 23, the air inlet pipe 32, the vacuum pump 30, and the air outlet pipe 31 in sequence. As the air in the fish collecting tank 10 gradually decreases, the pressure in the fish collecting tank 10 becomes increasingly lower, and water or a fish-water mixture enters the fish collecting tank 10 through the fish suction pipe 132, the fish suction port 13, and the speed reduction component 15. When the air in the fish collecting tank 10 is completely discharged and the fish-water mixture fills the fish collecting tank 10, water enters the water inlet pipe 21, the centrifugal pump 20, and the water outlet pipe 22 in sequence through the water outlet 12 at the top of the fish collecting tank 10.

[0068] S3. Start the centrifugal pump to suck fish:

[0069] When the water level in the outlet pipe 22 reaches the height where the liquid level switch 24 is located, the liquid level switch 24 transmits a signal to the control cabinet, which starts the centrifugal pump 20, closes the evacuation valve 322, disconnects the outlet pipe 22 of the centrifugal pump 20 from the air inlet pipe 32 of the vacuum pump 30, opens the air evacuation valve 321 connecting the air inlet pipe 32 of the vacuum pump 30 to the outside world, and opens the shut-off valve 223 between the outlet pipe 22 and the external water body, thereby allowing the water in the fish collecting tank 10 to be discharged from the outlet pipe 22 of the centrifugal pump 20.

[0070] The water in the fish collecting tank 10 is discharged into the external water body through the water inlet pipe 21, the centrifugal pump 20 and the water outlet pipe 22 in sequence; Figure 3 (thin arrow); since the centrifugal pump 20 is always working, the water in the fish collecting tank 10 is continuously discharged to the external water body, and the fish-water mixture is always along the fish suction pipe 132, the fish suction port 13, and the speed reduction component 15 into the fish collecting tank 10, thereby achieving the fish suction operation; at this time, the vacuum pump 30 is in working state, but the air sucked in by the air extraction valve 321 enters the vacuum pump 30 through the air inlet pipe 32, and is discharged into the atmosphere through the air outlet pipe 31 and the exhaust valve 311, as shown in FIG. Figure 3 (thick arrow) shows that it does not participate in the fish suction operation.

[0071] During the fish suction process, when the fish pass through the fish inlet 152 of the deceleration component 15, the speed of the fish-water mixture gradually decreases due to the gradual increase in the diameter of the fish inlet 152, which can prevent the fish from colliding with the inner wall of the fish collecting tank 10 and causing damage.

[0072] S4. Fish shavings:

[0073] After the centrifugal pump 20 has been running for a certain period of time, when there are many fish in the fish collecting tank 10, the centrifugal pump 20 is turned off, the pressure discharge valve 312 on the second pipeline 33 is opened, the air outlet pipe 31 of the vacuum pump 30 is connected to the vent pipe 111 of the fish collecting tank 10, the exhaust valve 311 on the air outlet pipe 31 of the vacuum pump 30 is closed, and the fish inlet valve 131 on the fish suction pipe 13 is closed. The vacuum pump 30 extracts air from the external atmosphere and sequentially passes through the air extraction valve 321, the air inlet pipe 32, the vacuum pump 30, the air outlet pipe 31, the second pipeline 33, the pressure discharge valve 312, and the vent pipe 111 into the fish collecting tank 10. The gas flows as follows: Figure 4 As shown, the fish water in the fish collecting tank 10 is pressurized, and the fish water can be discharged into the fish receiving pool located at a higher position under the action of pressure; after all the fish water in the fish collecting tank 10 is discharged, the fish discharge valve 141 and the pressure discharge valve 312 are closed, and the exhaust valve 311 is opened; thus completing a fish suction and discharge process;

[0074] S5, repeat steps S2-S4, realize uninterrupted fish suction, discharge fish to high place, after finishing, close centrifugal pump 20, vacuum pump 30, and all valves.

[0075] During the fish attracting process in step S3, in order to facilitate observation of the gathering of fish in the fish collecting tank 10, the fish collecting tank 10 may be made of a transparent material, or 1-3 viewing windows may be provided on the fish collecting tank 10.

[0076] During the fish discharge process in step S4, whether all the fish in the fish collecting tank 10 are discharged can be controlled by time. When the fish discharge time reaches the set time, the fish discharge valve 141 is closed. A liquid level switch detection can also be set on the fish discharge port 14. When the water level reaches the liquid level switch, a signal is transmitted to the control cabinet, and the control cabinet closes the fish discharge valve 141.

[0077] The above embodiment uses a conventional centrifugal pump as a power source to draw the fish-water mixture into the fish collection tank. The fish are then trapped in the fish collection tank 10 by the fish interceptor. The water then passes through the fish interceptor and the centrifugal pump before being discharged from the tank 10, achieving fish-water separation and fish collection. Once a certain concentration of fish has accumulated in the fish collection tank 10, the fish are discharged into the receiving pond, achieving efficient and non-destructive capture of the fish.

[0078] The entire fish suction system has a simple structure, low cost, and is easy to operate. The single fish suction time can be adjusted according to the type of fish to be caught. It is flexible, elastic, and highly controllable.

[0079] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to preferred embodiments, persons skilled in the art should understand that the specific implementation methods of the present invention may still be modified or some technical features may be replaced by equivalents without departing from the spirit of the technical solutions of the present invention, and all of these should fall within the scope of the technical solutions claimed for protection by the present invention.

Claims

1. An automatic fish suction method, characterized in that: The steps include: S1. Preparation: The fish collecting tank is immersed in the fish-water mixture by immersing the fish suction pipe, the fish collecting tank is connected to the water inlet pipe of the centrifugal pump, the water outlet pipe of the centrifugal pump is connected to the air inlet pipe of the vacuum pump, and the exhaust valve on the air outlet pipe of the vacuum pump that is connected to the outside atmosphere is opened; S2. Prime the pump: Starting the vacuum pump, water or fish-water mixture enters the fish collecting tank through the fish inlet pipe. After the fish collecting tank is full, the water enters the water inlet pipe, the centrifugal pump, and the water outlet pipe in sequence through the water outlet above the fish collecting tank. S3. Start the centrifugal pump and suck fish: When the water level in the water outlet pipe reaches a certain height, the centrifugal pump is started, the passage between the water outlet pipe of the centrifugal pump and the air inlet pipe of the vacuum pump is disconnected, the shut-off valve between the water outlet pipe and the external water body is opened, and the air extraction valve connecting the air inlet pipe of the vacuum pump with the outside is opened, so that the water in the fish collecting tank is discharged into the external water body through the water inlet pipe, the centrifugal pump, and the water outlet pipe in sequence; S4. Fish shavings: After the centrifugal pump has been running for a certain period of time, the centrifugal pump is turned off to connect the fish collecting tank to the outside atmosphere, and a fish discharge valve on a fish discharge pipe at the bottom of the fish collecting tank is opened. After all the fish water in the fish collecting tank is discharged, the fish discharge valve is closed to block the connection between the fish collecting tank and the outside atmosphere. S5. Repeat steps S2-S4 to achieve uninterrupted fish suction and discharge. After completion, close the centrifugal pump, the vacuum pump, and all valves.

2. The automatic fish suction method according to claim 1, wherein In step S4, after the centrifugal pump has been running for a certain period of time, the centrifugal pump is turned off, the fish discharge valve on the fish discharge pipe is opened, and the fish collecting tank is pressurized so that the fish in the fish collecting tank are discharged into a fish receiving pool at a height higher than the fish discharge port of the fish collecting tank under the action of pressure; After one fish discharge operation is completed, the pressurization of the fish collecting tank is stopped and the fish discharge valve is closed; steps S2-S4 are repeated to achieve uninterrupted fish suction and discharge to a higher place.

3. The automatic fish suction method according to claim 2, characterized in that In step S4, the fish collecting tank is pressurized by the vacuum pump. Specifically, after the centrifugal pump is turned off and the fish drain valve is opened, the air outlet pipe of the vacuum pump is connected to the fish collecting tank, the exhaust valve on the air outlet pipe of the vacuum pump is closed, and the fish inlet valve on the fish suction pipe is closed. The vacuum pump draws air from the outside atmosphere through the air extraction valve, the air inlet pipe, the vacuum pump, and the air outlet pipe in sequence into the fish collecting tank, thereby pressurizing the fish water in the fish collecting tank.

4. The automatic fish suction method according to claim 3, wherein: In step S3, the start-up of the centrifugal pump is controlled by a liquid level switch provided on the water outlet pipe.

5. The automatic fish sucking method according to claim 4, characterized in that: A regulating valve is also provided on the water outlet pipe of the centrifugal pump.

6. The automatic fish suction method according to claim 3, characterized in that: The fish collecting tank is provided with a deceleration component capable of reducing the speed of the fish-water mixture, the deceleration component comprising a fish inlet pipe and a fish inlet outlet located at the top of the fish inlet pipe, the fish inlet outlet being a trumpet-shaped structure with a narrow lower portion and a wide upper portion; The bottom of the fish collecting tank is oval, dish-shaped or conical; The bottom of the fish inlet pipe is connected to the fish suction port of the fish collecting tank, and the fish suction port is connected to the fish suction pipe. Fish enter the fish collecting tank through the fish suction pipe, the fish suction port, the fish inlet pipe, and the fish inlet port.

7. The automatic fish suction method according to claim 6, characterized in that: A water outlet is provided above the fish collecting tank, and a fish blocking component is provided below the water outlet.

8. The automatic fish suction method according to claim 7, characterized in that: A vent pipe connected to the outside atmosphere is also provided above the fish collecting tank. A vent valve is provided on the vent pipe. The vent valve controls the connection and disconnection between the fish collecting tank and the outside atmosphere. A pressure-discharge valve is provided on the connecting pipeline between the vent pipe and the outlet pipe of the vacuum pump. When the pressure-discharge valve is opened, the vacuum pump inflates and pressurizes the fish collecting tank.

9. The automatic fish suction method according to claim 8, characterized in that: The fish suction pipe is provided with a fish suction valve, and the fish discharge pipe is provided with a fish discharge valve; the water outlet pipe of the centrifugal pump is provided with a shut-off valve, the air inlet pipe of the vacuum pump is provided with an exhaust valve for controlling the air inlet pipe to suck air from the outside, and the air outlet pipe of the vacuum pump is provided with an exhaust valve for controlling the air outlet pipe to exhaust air to the outside.

10. The automatic fish suction method according to claim 9, characterized in that: The centrifugal pump, the vacuum pump, the shut-off valve, the vent valve, the pressure-discharge valve, the air extraction valve, the exhaust valve, the fish discharge valve, and the fish inlet valve are connected to the control cabinet signal and are controlled by the linkage of the control cabinet.

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