A non-destructive continuous suction capture system and its working method

Abstract

The present invention relates to the technical field of fishery breeding equipment, and in particular to a non-destructive continuous suction and capture system and a working method thereof, comprising: a fish-water separation component, one end of which is connected to a fish suction pipe, for separating the fish-water mixture sucked up by the fish suction pipe from the water; a centrifugal pump, for discharging the water separated by the fish-water separation component into a pool; a buffer tank, for caching the fish separated by the fish-water separation component; a vacuum pump, an air inlet pipe of the vacuum pump being connected to the buffer tank through a first pipeline, and an air outlet pipe being connected to the ventilation pipe of the buffer tank through a pressurized pipe; a control cabinet; when the buffer tank is sealed, the vacuum pump is started to evacuate the buffer tank, the fish-water mixture enters the fish suction pipe and the fish-water separation component, the fish enter the buffer tank, and the water is discharged through the centrifugal pump; during the entire fish suction and discharge process, the fish do not pass through a running machine, thereby avoiding mechanical damage, and the fish are naturally distributed in the buffer tank, thereby avoiding damage to the fish due to mutual friction and collision.

Description

Technical Field

[0001] The present invention relates to the technical field of fishery breeding equipment, and in particular to a non-destructive continuous suction capture system and a working method thereof. Background Art

[0002] Fishery machinery is an indispensable and important part of modern fishery technology, and is also an important technical support for the construction of modern fisheries in my country.

[0003] With the development of aquaculture and fishing operations in my country, the scale of single fish handling has gradually increased, and traditional manual operations are no longer sufficient. The demand for modern fishery equipment with mechanization, automation, and intelligence is increasing, especially for large-scale aquaculture equipment such as deep-water cages and aquaculture vessels, which have higher requirements for mechanization, automation, and intelligence.

[0004] Fish catching and counting are important links in fishery production, including the transfer of fry into ponds, the grading and separation of farmed fish, the catching of adult fish, and the transportation and lifting of catches. How to improve production efficiency and reduce fish damage rates in these links is an important technical issue that needs to be solved. Summary of the Invention

[0005] In view of the deficiencies in the above-mentioned prior art, the present invention provides a non-destructive continuous suction capture system and a working method thereof which does not damage the fish body, has a high degree of automation and high working efficiency.

[0006] The non-destructive continuous suction capture system provided by the present invention comprises:

[0007] A fish-water separation component, one end of which is connected to a fish suction tube, for separating the fish-water mixture sucked by the fish suction tube into fish and water;

[0008] a centrifugal pump, wherein the water inlet pipe of the centrifugal pump is connected to the fish-water separation component, the water outlet pipe of the centrifugal pump is connected to the pool, and the centrifugal pump discharges the water separated by the fish-water separation component into the pool;

[0009] a buffer tank for caching the fish separated by the fish-water separation assembly, the buffer tank being connected to the fish-water separation assembly via a fish inlet pipe and connected to external water supply via a water supply pipe, and a ventilation pipe being connected above the buffer tank;

[0010] A vacuum pump, wherein the air inlet pipe of the vacuum pump is connected to the cache tank via a first pipeline, the air outlet pipe of the vacuum pump is connected to the vent pipe of the cache tank via a pressurized pipe, and an evacuation valve is provided on the first pipeline, an air extraction valve is provided on the air inlet pipe, and an air outlet valve is provided on the air outlet pipe;

[0011] A control cabinet is connected to the centrifugal pump and the vacuum pump by signal, and the control cabinet controls the valve of the suction and capture system in a linkage manner;

[0012] When the cache tank is sealed, the vacuum pump is started to evacuate the cache tank. As the air pressure in the cache tank drops, the fish-water mixture enters the fish suction pipe and the fish-water separation component, the fish enters the cache tank, and the water is discharged through the centrifugal pump.

[0013] The non-destructive continuous suction and capture system of this technical solution adopts ordinary centrifugal pumps and vacuum pumps, which reduces the cost of mechanical research and development. During the entire process of sucking and releasing fish, the fish do not pass through the running machinery, avoiding mechanical damage. The fish are naturally distributed in the buffer tank, avoiding damage due to mutual friction and collision between the fish.

[0014] In some embodiments of the present application, the outlet pipe of the centrifugal pump is provided with a regulating valve for adjusting the flow rate of the centrifugal pump, and the outlet pipe is also provided with a shut-off valve for controlling the connection between the outlet pipe and the water pool.

[0015] In some embodiments of the present application, the fish-water separation assembly includes a holding box and a water receiving box located below the holding box. A separator is provided between the holding box and the water receiving box. The separator separates the fish-water mixture, and the fish remain in the holding box while the water falls into the water receiving box.

[0016] In some embodiments of the present application, in order to enable fish to enter the cache tank smoothly and avoid congestion in the holding box, the fish suction pipe and the fish inlet pipe are respectively located at both ends of the holding box, and the separator is arranged to be tilted downward from the end close to the fish suction pipe to the end close to the fish inlet pipe.

[0017] In some embodiments of the present application, the water-falling projection area of ​​the separator is larger than the cross-sectional area of ​​the fish suction tube;

[0018] The bottom of the cache tank is elliptical, dish-shaped or conical, which is convenient for draining the fish water inside the cache tank.

[0019] In some embodiments of the present application, the buffer tank is provided with a plurality of sight glasses capable of observing fish, so as to better control the density and amount of fish in the buffer tank; the buffer tank is also provided with a liquid level transmitter to control the amount of water supply in the buffer tank to avoid excessive water supply;

[0020] A fish drain pipe is provided at the bottom of the cache tank, and a fish drain valve is provided on the fish drain pipe.

[0021] In some embodiments of the present application, a drain valve is provided on the water inlet pipe of the centrifugal pump. When the drain valve is opened, the water in the water inlet pipe, the water outlet pipe and the centrifugal pump is discharged into the drainage system; the water outlet pipe of the centrifugal pump is also provided with a shut-off valve for controlling the connection between the water outlet pipe and the water tank. The shut-off valve is provided behind the regulating valve.

[0022] An air extraction valve is provided on the air inlet pipe of the vacuum pump, an air outlet valve is provided on the air outlet pipe of the vacuum pump, and an evacuation valve is provided on the first pipeline;

[0023] The pressurizing pipe is provided with a pressurizing valve, and the venting pipe is provided with a venting valve.

[0024] The above-mentioned non-destructive continuous suction capture system, when in operation, comprises the following steps:

[0025] S1. Preparation:

[0026] Immerse the fish suction tube in the fish-water mixture, adjust the regulating valve on the outlet pipe of the centrifugal pump to fully open, close the shut-off valve on the outlet pipe of the centrifugal pump, close the pressurizing valve, air extraction valve, evacuation valve, and air outlet valve, and open the fish inlet valve on the fish inlet pipe;

[0027] S2. Cache tank filling:

[0028] Open the vent valve to connect the buffer tank to the outside atmosphere, open the water supply valve on the water supply pipe, and add water to the buffer tank. When the water level reaches the set value, the liquid level transmitter transmits a signal to the control cabinet, and then closes the water supply valve and vent valve;

[0029] S3. Start the vacuum pump and suck fish:

[0030] Open the evacuation valve and the air outlet valve so that the air inlet pipe and the air outlet pipe of the vacuum pump form passages with the buffer tank respectively. Start the vacuum pump, exhaust the gas in the buffer tank, reduce the pressure in the buffer tank, and allow the fish-water mixture to enter the fish-water separation assembly through the fish suction pipe. In the fish-water separation assembly, water passes through the separator and falls into the water receiving box and then into the water inlet pipe of the centrifugal pump. The fish are counted in the holding box and slide into the fish inlet pipe and then into the buffer tank.

[0031] S4. Start the centrifugal pump and drain the fish:

[0032] Open the shutoff valve on the outlet pipe of the centrifugal pump, start the centrifugal pump, and discharge the water separated by the separation element into the pool through the water inlet pipe, the centrifugal pump, and the outlet pipe. Observe the aggregation of fish in the buffer tank through the sight glass. When the fish density and amount in the buffer tank meet the requirements, turn off the vacuum pump and the centrifugal pump, open the vent valve on the vent pipe and the fish discharge valve on the fish discharge pipe, close the shutoff valve, the evacuation valve, and the air outlet valve, and the fish-water mixture in the buffer tank enters the fish receiving system through the fish discharge pipe under the action of gravity;

[0033] S5. After all the fish-water mixture in the cache tank is drained, open the drain valve, and after all the water in the centrifugal pump and its water inlet and outlet pipes is drained, close all valves.

[0034] In some embodiments of the present application, when the height of the fish receiving system is higher than the height of the fish discharge port at the bottom of the buffer tank, the buffer tank needs to be pressurized so that the fish are pressurized and discharged into the fish receiving system located at a higher position when rushing out of the fish discharge pipe. In step S4, when the fish density and amount in the buffer tank meet the requirements, the air extraction valve, the pressure valve, and the fish discharge valve are opened, the centrifugal pump is turned off, and the fish inlet valve, the shut-off valve, the evacuation valve, and the air outlet valve are closed. The vacuum pump inflates and pressurizes the buffer tank, and the fish-water mixture in the buffer tank enters the fish receiving system through the fish discharge pipe under the action of air pressure.

[0035] In step S5, after all the fish-water mixture in the buffer tank is drained, the vacuum pump is turned off, the drain valve is opened, and after the water in the centrifugal pump and its water inlet pipe and outlet pipe is drained, all valves are closed.

[0036] In some embodiments of the present application, in step S3, before the fish suction begins, the liquid level of the supply water in the buffer tank is lower than the installation height of the fish inlet pipe.

[0037] Based on the above technical solution, the non-destructive continuous suction capture system and its working method of the present invention use ordinary centrifugal pumps and vacuum pumps, reducing the cost of mechanical research and development. During the entire fish suction and discharge process, the fish do not pass through the running machinery, thus avoiding mechanical damage. The fish are naturally distributed in the buffer tank, thus avoiding damage caused by mutual friction and collision between the fish.

[0038] The single operation time can be adjusted according to the density of fish water in the fish pond, with flexible operation, great flexibility and strong controllability;

[0039] The whole system has a simple structure, easy operation and low cost; the whole fish suction and discharge process has a high degree of automation and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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:

[0041] Figure 1 Schematic diagram of the structure of the suction capture system according to an embodiment of the present invention;

[0042] Figure 2 This is a schematic structural diagram of a fish-water separation component according to an embodiment of the present invention.

[0043] In the figure,

[0044] 10. Counting device; 20. Fish-water separation assembly; 21. Water receiving tank; 22. Separator; 23. Fish suction pipe; 24. Vacuum gauge; 25. Holding tank; 30. Centrifugal pump; 31. Water inlet pipe; 311. Drain valve; 32. Water outlet pipe; 321. Pressure gauge; 322. Check valve; 323. Regulating valve; 324. Shut-off valve; 40. Buffer tank; 41. Fish inlet pipe; 411. Fish inlet valve ; 42. Water supply pipe; 421. Water supply valve; 43. Ventilation pipe; 431. Ventilation valve; 44. Pressurization pipe; 441. Pressurization valve; 45. Fish drain pipe; 451. Fish drain valve, 46. Liquid level transmitter; 47. Sight glass; 48. Manhole; 49. First pipeline; 50. Vacuum pump; 51. Air inlet pipe; 511. Exhaust valve; 512. Evacuation valve; 52. Exhaust pipe; 521. Exhaust valve. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] The lossless continuous suction capture system in this embodiment is as follows: Figure 1-2 Shown, including

[0050] The fish-water separation component 20 has a water inlet connected to the fish suction pipe 23, which separates the fish-water mixture sucked by the fish suction pipe 23 into fish and water;

[0051] A centrifugal pump 30, wherein the water inlet pipe 31 of the centrifugal pump 30 is connected to the fish-water separation component 20, and the water outlet pipe 32 of the centrifugal pump 30 is connected to the pool. The centrifugal pump 30 discharges the water separated by the fish-water separation component 20 into the pool;

[0052] A buffer tank 40 is used to buffer the fish separated by the fish-water separation assembly 20. The buffer tank 40 is connected to the fish outlet of the fish-water separation assembly 20 via a fish inlet pipe 41, and is connected to the external water supply via a water supply pipe 42. A ventilation pipe 43 is connected to the top of the buffer tank 40;

[0053] A vacuum pump 50, an air inlet pipe 51 of the vacuum pump 50 is connected to the buffer tank 40 via a first pipe 49, an air outlet pipe 52 of the vacuum pump 50 is connected to the vent pipe 43 of the buffer tank 40 via a pressurizing pipe 44, and an evacuation valve 512 is provided on the first pipe 49, an air extraction valve 511 is provided on the air inlet pipe 51, and an air outlet valve 521 is provided on the air outlet pipe 52;

[0054] When the cache tank 40 is sealed, the vacuum pump 50 is started to evacuate the cache tank 40. As the air pressure in the cache tank 40 decreases, the fish-water mixture enters the fish suction pipe 23 and the fish-water separation component 20, the fish enters the cache tank 40, and the water is discharged through the centrifugal pump 30.

[0055] like Figure 1 As shown, the outlet pipe 32 of the centrifugal pump 30 is provided with a regulating valve 323 for regulating the flow of the centrifugal pump 30 , and the outlet pipe 32 is also provided with a shut-off valve 324 for controlling the connection between the outlet pipe 32 and the water pool.

[0056] like Figure 2 As shown, the fish-water separation component 20 includes a holding box 25 and a water receiving box 21 located below the holding box 25. A separator 22 is provided between the holding box 25 and the water receiving box 21. The separator 22 separates the fish-water mixture. The fish remain in the holding box 25 and enter the buffer tank 40, and the water falls into the water receiving box 21. Drain holes are evenly provided on the separator 22. The drain holes can be rectangular or circular holes, and the aperture of the drain holes is smaller than the minimum width of the fish body. The length of the separator 22 is just enough to completely complete the separation of fish and water before the fish-water mixture passes through the separator 22 and enters the fish inlet pipe 41. The drainage projection area of ​​the separator 22 is larger than the cross-sectional area of ​​the fish suction pipe 23.

[0057] In order to enable the fish to enter the buffer tank 40 smoothly and avoid congestion in the holding box 25, Figure 2As shown, the fish suction pipe 23 is connected to the water inlet end of the fish-water separation assembly 20, and the fish inlet pipe 41 is connected to the fish outlet end of the fish-water separation assembly 20. The fish suction pipe 23 and the fish inlet pipe 41 are respectively located at the left and right ends of the holding box 25, and the separator 22 is arranged to tilt downward from the end closest to the fish suction pipe 23 to the end closest to the fish inlet pipe 41. The water receiving box 21 has an inverted triangle structure, and water collects at the bottom of the water receiving box 21. The bottom end of the water receiving box 21 serves as the water outlet. The water inlet pipe 31 of the centrifugal pump 30 is connected to the water outlet, which facilitates the timely discharge of water in the water receiving box 21 through the centrifugal pump 30. A counting device 10 for detecting the number of fish and a vacuum gauge 24 for measuring the vacuum level within the holding box 25 are also provided above the holding box 25.

[0058] Continue to see Figure 1 The cache tank 40 is provided with a plurality of mirrors 47 for observing fish. In the present embodiment, the number of the mirrors 47 is 1-3, so as to better observe the density and quantity of fish in the cache tank 40; the cache tank 40 is also provided with a liquid level transmitter 46 to control the amount of water supply in the cache tank 40 to avoid excessive water supply; the bottom of the cache tank 40 is elliptical, dish-shaped or conical, which is convenient for discharging fish water inside the cache tank 40. A fish drain pipe 45 is provided at the bottom of the cache tank 40, and a fish drain valve 451 is provided on the fish drain pipe 45.

[0059] The water inlet pipe 31 of the centrifugal pump 30 is provided with a drain valve 311. When the drain valve 311 is opened, the water flowing from the water receiving tank 21 into the water inlet pipe 31, the centrifugal pump 30, and the water outlet pipe 32 is discharged into the drainage system. The water outlet pipe 32 of the centrifugal pump 30 is provided with a regulating valve 323 for regulating the flow rate of the centrifugal pump 30. At the same time, the water outlet pipe 32 is also provided with a shut-off valve 324 for controlling the connection between the water outlet pipe 32 and the water tank. The shut-off valve 324 is arranged behind the regulating valve 323.

[0060] The vacuum pump 50 has an exhaust valve 511 installed on its inlet pipe 51, an outlet valve 521 installed on its outlet pipe 52, an evacuation valve 512 installed on the first pipeline 49, a pressurization valve 441 installed on the pressure pipe 44, and a vent valve 431 installed on the vent pipe 43. The flow rate of the centrifugal pump 30 matches the water absorption capacity of the vacuum pump 50. During system operation, the flow rate of the centrifugal pump 30 can be adjusted using a regulating valve 323 on the outlet pipe 32 of the centrifugal pump 30.

[0061] The centrifugal pump 30, the vacuum pump 50, and all the valves mentioned above are connected to a control cabinet (not shown) by signal and are controlled by the control cabinet.

[0062] As an embodiment of the present invention, when the buffer tank 40 discharges fish downward, that is, the fish receiving system is located below the buffer tank 40, the above-mentioned non-destructive continuous suction capture system operates, including the following steps:

[0063] S1. Preparation:

[0064] The fish suction pipe 23 is immersed in the fish-water mixture, the regulating valve 323 on the outlet pipe 32 of the centrifugal pump 30 is adjusted to be fully open, the shut-off valve 324 on the outlet pipe 32 of the centrifugal pump 30 is closed, the pressurizing valve 441, the air extraction valve 511, the evacuation valve 512, and the air outlet valve 521 are closed, and the fish inlet valve 411 on the fish inlet pipe 41 is opened;

[0065] S2. Cache tank filling:

[0066] Open the vent valve 431 on the vent pipe 43 of the buffer tank 40 to connect the buffer tank 40 to the outside atmosphere. Open the water supply valve 421 on the water supply pipe 42 to add water to the buffer tank 40. When the water level reaches the set value, the liquid level transmitter 46 transmits a signal to the control cabinet, and then closes the water supply valve 421 and the vent valve 431 to disconnect the buffer tank 40 from the outside atmosphere.

[0067] S3. Start the vacuum pump and suck fish:

[0068] The evacuation valve 512 and the air outlet valve 521 are opened, so that the air inlet pipe 51 and the air outlet pipe 52 of the vacuum pump 50 form passages with the buffer tank 40 respectively, and the vacuum pump 50 is started. The gas in the buffer tank 40 is discharged in sequence through the first pipeline 49, the air inlet pipe 51, the vacuum pump 50, and the air outlet pipe 52. Since the fish-water separation component 20 is connected to the buffer tank 40, the air in the fish-water separation component 20 will also enter the buffer tank 40 and then be discharged. As the pressure in the fish-water separation component 20 and the buffer tank 40 decreases, the fish-water mixture enters the fish-water separation component 20 through the fish suction pipe 23. In the fish-water separation component 20, the water passes through the separator 22 and falls into the water receiving box 21 and into the water inlet pipe 31 of the centrifugal pump 30. The fish are counted in the holding box 25 and slide into the fish inlet pipe 41 and then into the buffer tank 40.

[0069] S4. Start the centrifugal pump and drain the fish:

[0070] Open the shutoff valve 324 on the outlet pipe 32 of the centrifugal pump 30, start the centrifugal pump 30, and discharge the water separated by the separator 22 into the pool through the water inlet pipe 31, the centrifugal pump 30, and the outlet pipe 32. Observe the aggregation of fish in the buffer tank 40 through the sight glass 47. When the fish density and amount in the buffer tank 40 meet the requirements, turn off the vacuum pump 50 and the centrifugal pump 30, open the vent valve 431 on the vent pipe 43 of the buffer tank 40 to connect the buffer tank 40 to the outside atmosphere, open the fish discharge valve 451 on the fish discharge pipe 45, close the shutoff valve 324, the evacuation valve 512, and the air outlet valve 521, and the fish-water mixture in the buffer tank 40 enters the fish receiving system through the fish discharge pipe 45 under the action of gravity;

[0071] S5. After all the fish-water mixture in the buffer tank 40 is drained, open the drain valve 311. After all the water in the centrifugal pump 30 and its water inlet pipe 31 and water outlet pipe 32 is drained, close all valves.

[0072] As another embodiment of the present invention, when the buffer tank 40 discharges fish upward, that is, the fish receiving system is located above the buffer tank 40, the above-mentioned non-destructive continuous suction capture system operates, including the following steps:

[0073] S1. Preparation:

[0074] The fish suction pipe 23 is immersed in the fish-water mixture, the regulating valve 323 on the outlet pipe 32 of the centrifugal pump 30 is adjusted to be fully open, the shut-off valve 324 on the outlet pipe 32 of the centrifugal pump 30 is closed, the pressurizing valve 441, the air extraction valve 511, the evacuation valve 512, and the air outlet valve 521 are closed, and the fish inlet valve 411 on the fish inlet pipe 41 is opened;

[0075] S2. Cache tank filling:

[0076] Open the vent valve 431 on the vent pipe 43 of the buffer tank 40 to connect the buffer tank 40 to the outside atmosphere. Open the water supply valve 421 on the water supply pipe 42 to add water to the buffer tank 40. When the water level reaches the set value, the liquid level transmitter 46 transmits a signal to the control cabinet, and then closes the water supply valve 421 and the vent valve 431 to disconnect the buffer tank 40 from the outside atmosphere.

[0077] S3. Start the vacuum pump and suck fish:

[0078] The evacuation valve 512 and the air outlet valve 521 are opened, so that the air inlet pipe 51 and the air outlet pipe 52 of the vacuum pump 50 form passages with the buffer tank 40 respectively, and the vacuum pump 50 is started. The gas in the buffer tank 40 is discharged in sequence through the first pipeline 49, the air inlet pipe 51, the vacuum pump 50, and the air outlet pipe 52. Since the fish-water separation component 20 is connected to the buffer tank 40, the air in the fish-water separation component 20 will also enter the buffer tank 40 and then be discharged. As the pressure in the fish-water separation component 20 and the buffer tank 40 decreases, the fish-water mixture enters the fish-water separation component 20 through the fish suction pipe 23. In the fish-water separation component 20, the water passes through the separator 22 and falls into the water receiving box 21 and into the water inlet pipe 31 of the centrifugal pump 30. The fish are counted in the holding box 25 and slide into the fish inlet pipe 41 and then into the buffer tank 40.

[0079] S4. Start the centrifugal pump and drain the fish:

[0080] Open the shutoff valve 324 on the outlet pipe 32 of the centrifugal pump 30, start the centrifugal pump 30, and discharge the water separated by the separator 22 into the pool through the water inlet pipe 31, the centrifugal pump 30, and the water outlet pipe 32. Observe the gathering of fish in the buffer tank 40 through the sight glass 47. When the fish density and quantity in the buffer tank 40 meet the requirements, open the air extraction valve 511, the pressure valve 441, and the fish discharge valve 451, turn off the centrifugal pump 30, close the fish inlet valve 411, the shutoff valve 324, the evacuation valve 512, and the air outlet valve 521, and allow outside air to enter the buffer tank 40 through the air inlet pipe 51, the vacuum pump 50, the air outlet pipe 52, the pressure pipe 44, and the vent pipe 43, inflating and pressurizing the buffer tank 40. Under the action of the air pressure, the fish-water mixture in the buffer tank 40 enters the fish receiving system through the fish discharge pipe 45.

[0081] S5. After all the fish-water mixture in the buffer tank 40 is drained, turn off the vacuum pump 50, open the drain valve 311, and after all the water in the centrifugal pump 30 and its water inlet pipe 31 and outlet pipe 32 is drained, close all valves.

[0082] In the above two embodiments, in step S3, before the fish suction begins, the liquid level of the supply water in the buffer tank is lower than the installation height of the fish inlet pipe.

[0083] The non-destructive continuous suction and capture system and its working method of the present invention adopt ordinary centrifugal pumps and vacuum pumps, which reduces the cost of mechanical research and development; during the entire fish suction and discharge process, the fish do not pass through the running machinery, thus avoiding mechanical damage, and the fish are naturally distributed in the buffer tank, thus avoiding damage to the fish due to mutual friction and collision; the single operation time can be adjusted according to the density of fish water in the fish pond, and the operation is flexible, elastic and highly controllable; the entire system has a simple structure, is easy to operate and has low cost; the entire fish suction and discharge process has a high degree of automation and high reliability.

[0084] 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.

[0085] 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. A method for operating a non-destructive continuous suction capture system, characterized in that: The non-destructive continuous suction capture system comprises: A fish-water separation component, one end of which is connected to a fish suction tube, for separating the fish-water mixture sucked by the fish suction tube into fish and water; a centrifugal pump, wherein the water inlet pipe of the centrifugal pump is connected to the fish-water separation component, the water outlet pipe of the centrifugal pump is connected to the pool, and the centrifugal pump discharges the water separated by the fish-water separation component into the pool; A buffer tank is used to buffer the fish separated by the fish-water separation assembly. The buffer tank is connected to the fish-water separation assembly via a fish inlet pipe and is connected to external water supply via a water supply pipe. A ventilation pipe is connected to the top of the buffer tank. A fish discharge pipe is provided at the bottom of the buffer tank, and a fish discharge valve is provided on the fish discharge pipe. A vacuum pump, wherein the air inlet pipe of the vacuum pump is connected to the cache tank via a first pipeline, the air outlet pipe of the vacuum pump is connected to the vent pipe of the cache tank via a pressurized pipe, and an evacuation valve is provided on the first pipeline, an air extraction valve is provided on the air inlet pipe, and an air outlet valve is provided on the air outlet pipe; A control cabinet is connected to the centrifugal pump and the vacuum pump by signal, and the control cabinet controls the valve of the suction and capture system in a linkage manner; When the cache tank is sealed, the vacuum pump is started to evacuate the cache tank. As the air pressure in the cache tank decreases, the fish-water mixture enters the fish suction pipe and the fish-water separation component, the fish enter the cache tank, and the water is discharged through the centrifugal pump. The working method of the above-mentioned non-destructive continuous suction capture system includes the following steps: S1. Preparation: Immerse the fish suction tube in the fish-water mixture, adjust the regulating valve on the outlet pipe of the centrifugal pump to fully open, close the shut-off valve on the outlet pipe of the centrifugal pump, close the pressurizing valve, air extraction valve, evacuation valve, and air outlet valve, and open the fish inlet valve on the fish inlet pipe; S2. Cache tank filling: Open the vent valve to connect the buffer tank to the outside atmosphere, open the water supply valve on the water supply pipe, and add water to the buffer tank. When the water level reaches the set value, the liquid level transmitter transmits a signal to the control cabinet, and then closes the water supply valve and vent valve; S3. Start the vacuum pump and suck fish: Open the evacuation valve and the air outlet valve so that the air inlet pipe and the air outlet pipe of the vacuum pump form passages with the buffer tank respectively. Start the vacuum pump, exhaust the gas in the buffer tank, reduce the pressure in the buffer tank, and allow the fish-water mixture to enter the fish-water separation assembly through the fish suction pipe. In the fish-water separation assembly, the water passes through the separator and falls into the water receiving box and then into the water inlet pipe of the centrifugal pump. The fish are counted in the holding box and slide into the fish inlet pipe, and then enter the buffer tank. S4. Start the centrifugal pump and drain the fish: Open the shutoff valve on the outlet pipe of the centrifugal pump, start the centrifugal pump, and discharge the water separated by the separation element into the pool through the water inlet pipe, the centrifugal pump, and the outlet pipe. Observe the aggregation of fish in the buffer tank through the sight glass. When the fish density and amount in the buffer tank meet the requirements, turn off the vacuum pump and the centrifugal pump, open the vent valve on the vent pipe and the fish discharge valve on the fish discharge pipe, close the shutoff valve, the evacuation valve, and the air outlet valve, and the fish-water mixture in the buffer tank enters the fish receiving system through the fish discharge pipe under the action of gravity; S5. After all the fish-water mixture in the cache tank is drained, open the drain valve, and after all the water in the centrifugal pump and its water inlet and outlet pipes is drained, close all valves.

2. The working method of the non-destructive continuous suction capture system according to claim 1, characterized in that: The outlet pipe of the centrifugal pump is provided with a regulating valve for regulating the flow of the centrifugal pump, and the outlet pipe is also provided with a shut-off valve for controlling the connection between the outlet pipe and the water pool.

3. The working method of the non-destructive continuous suction capture system according to claim 2, characterized in that: The fish-water separation assembly includes a holding box and a water receiving box located below the holding box. A separator is provided between the holding box and the water receiving box. The separator separates the fish-water mixture, so that the fish remain in the holding box and the water falls into the water receiving box. A counting device is provided on the holding box.

4. The working method of the non-destructive continuous suction capture system according to claim 3, characterized in that: The fish suction pipe and the fish inlet pipe are respectively located at two ends of the accommodating box, and the separator is tilted downward from an end close to the fish suction pipe to an end close to the fish inlet pipe.

5. The working method of the non-destructive continuous suction capture system according to claim 4, characterized in that: The projected area of ​​the separator falling into the water is larger than the cross-sectional area of ​​the fish suction tube; The bottom of the cache tank is elliptical, dish-shaped or conical, which is convenient for draining the fish water inside the cache tank.

6. The working method of the non-destructive continuous suction capture system according to claim 1, characterized in that: The cache tank is provided with a plurality of sight glasses capable of observing fish; the cache tank is also provided with a liquid level transmitter to control the amount of water supplied in the cache tank.

7. The working method of the non-destructive continuous suction capture system according to claim 6, characterized in that: The water inlet pipe of the centrifugal pump is provided with a drain valve. When the drain valve is opened, the water in the water inlet pipe, the water outlet pipe and the centrifugal pump is discharged into the drainage system; the water outlet pipe of the centrifugal pump is provided with a regulating valve for regulating the flow rate of the centrifugal pump, and the water outlet pipe is also provided with a shut-off valve for controlling the connection between the water outlet pipe and the pool, and the shut-off valve is provided behind the regulating valve; An air extraction valve is provided on the air inlet pipe of the vacuum pump, an air outlet valve is provided on the air outlet pipe of the vacuum pump, and an evacuation valve is provided on the first pipeline; The pressurizing pipe is provided with a pressurizing valve, and the venting pipe is provided with a venting valve.

8. The working method of the non-destructive continuous suction capture system according to claim 1, characterized in that: In step S4, when the density and amount of fish in the buffer tank meet the requirements, the air extraction valve, the pressure valve, and the fish discharge valve are opened, the centrifugal pump is turned off, and the fish inlet valve, the shut-off valve, the evacuation valve, and the air outlet valve are closed. The vacuum pump inflates and pressurizes the buffer tank, and the fish-water mixture in the buffer tank enters the fish receiving system located at a high position through the fish discharge pipe under the action of air pressure; In step S5, after all the fish-water mixture in the buffer tank is drained, the vacuum pump is turned off, the drain valve is opened, and after the water in the centrifugal pump and its water inlet pipe and outlet pipe is drained, all valves are closed.

9. The working method of the non-destructive continuous suction capture system according to claim 1 or 8, characterized in that: In step S3, before the fish suction begins, the liquid level of the supply water in the buffer tank is lower than the installation height of the fish inlet pipe.

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