A live fish capture counting and grading system and its working method

Abstract

The invention relates to the technical field of fish farming equipment, and in particular to a live fish catching counting and grading system and a working method thereof, comprising: a fish-water separation component, for separating fish and water from a fish-water mixture sucked by a fish suction pipe; a vacuum tank, which is connected to the fish-water separation component through a water connection pipe and is used to cache water separated by the fish-water separation component; a centrifugal pump, which discharges the water in the vacuum tank into a pool; a cache tank, which is used to cache fish separated by the fish-water separation component, and is provided with a fish discharge port at the bottom, which is connected to a fish discharge pipe, and the fish discharge pipe is connected to a fish grading device; a compressor, which fills the cache tank with high-pressure gas; an ordinary centrifugal pump is used to reduce the cost of mechanical research and development; in the whole process of sucking and discharging fish, the fish do not pass through a running machine, so mechanical damage is avoided, and the fish are naturally distributed in the cache tank, so damage due to mutual friction and collision between the fish is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of fishery breeding equipment, and in particular to a live fish capture counting and grading 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 processing has gradually increased, and traditional manual operation methods can no longer meet the requirements. The demand for mechanized, automated, and intelligent modern fishery equipment technology 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, counting and grading are important links in fishery production, including the transfer of fry into ponds, grading and separation of farmed fish into ponds, catching adult fish, and transporting and lifting the catch. How to improve production efficiency and reduce fish damage rate 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 live fish catching, counting and grading 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 live fish capture counting and grading 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 from the water;

[0008] A vacuum tank, which is connected to the fish-water separation component through a water receiving pipe and is used to buffer the water separated by the fish-water separation component. A first water supply pipe connected to external water supply is provided above the vacuum tank, and an emptying pipe is provided at the bottom of the vacuum tank, and the emptying pipe is connected to a drainage system;

[0009] A centrifugal pump, wherein a water inlet pipe of the centrifugal pump is connected to the bottom of the vacuum tank, a water outlet pipe of the centrifugal pump is connected to the water pool, and the centrifugal pump discharges the water in the vacuum tank into the water pool;

[0010] A buffer tank, used for buffering the fish separated by the fish-water separation component, the buffer tank is connected to the fish-water separation component through a fish inlet pipe, and is connected to external supply water through a second water supply pipe, a fish discharge port is provided at the bottom of the buffer tank, the fish discharge port is connected to a fish discharge pipe, and the fish discharge pipe is connected to a fish grading device;

[0011] A compressor, wherein an air inlet pipe of the compressor is connected to the outside atmosphere, an air outlet pipe is connected to the buffer tank, the compressor fills the buffer tank with high-pressure gas through the air outlet pipe, and an air outlet valve is provided on the air outlet pipe;

[0012] A control cabinet is connected to the centrifugal pump and the compressor by signal, and the control cabinet is linked to control the valve of the live fish catching counting and grading system;

[0013] The fish-water mixture enters the fish-water separation component through the fish suction pipe, the fish enter the buffer tank, and then enter the fish grading device for grading, and the water is discharged through the vacuum tank and the centrifugal pump in turn.

[0014] The live fish capture counting and grading system of the present technical solution adopts an ordinary centrifugal pump, which reduces the cost of mechanical research and development; during the entire process of sucking and discharging fish, 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 to the fish due to mutual friction and collision.

[0015] In some embodiments of the present application, a regulating valve for adjusting the flow rate of the centrifugal pump is provided on the water outlet pipe of the centrifugal pump, and a shut-off valve for controlling the connection between the water outlet pipe and the water pool is also provided on the water outlet pipe.

[0016] 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, 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, and an exhaust pipe connected to the outside atmosphere is also provided on the holding box, and an exhaust valve is provided on the exhaust pipe.

[0017] In some embodiments of the present application, in order to allow fish to smoothly enter the cache tank 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 inclined downward from an end close to the fish suction pipe to an end close to the fish inlet pipe.

[0018] In some embodiments of the present application, the water-falling projection area of ​​the separation element is larger than the cross-sectional area of ​​the fish suction tube;

[0019] The bottom of the cache tank is elliptical, dish-shaped or conical, which is convenient for draining the fish water inside the cache tank.

[0020] In some embodiments of the present application, the cache tank is provided with a plurality of mirrors for observing fish so as to better control the density and quantity of fish in the cache tank; the cache tank is also provided with a second liquid level transmitter to control the amount of replenishing water in the cache tank to avoid excessive replenishing water.

[0021] In some embodiments of the present application, a drain valve is provided on the drain pipe of the vacuum tank. When the drain valve is opened, the water in the vacuum tank is discharged into the drainage system. A first liquid level transmitter is also provided in the vacuum tank to control the amount of replenishing water in the vacuum tank to avoid excessive replenishing water.

[0022] The outlet pipe of the centrifugal pump is also provided with a shut-off valve for controlling the connection between the outlet pipe and the water pool, and the shut-off valve is arranged behind the regulating valve;

[0023] An air outlet valve is provided on the air outlet pipe of the compressor. When the air outlet valve is opened, the compressor fills the high-pressure air into the buffer tank.

[0024] When the live fish capture counting and grading system is working, it includes the following steps:

[0025] S1. Preparation:

[0026] Immerse the fish suction pipe in the fish-water mixture, adjust the regulating valve on the outlet pipe of the centrifugal pump to be fully open, close the shut-off valve on the outlet pipe of the centrifugal pump, close the outlet valve on the outlet pipe of the compressor and the fish discharge valve at the bottom of the buffer tank, open the fish inlet valve on the fish inlet pipe and the exhaust valve on the fish-water separation assembly;

[0027] S2, vacuum tank, buffer tank water replenishment:

[0028] Open the first water supply valve on the vacuum tank and the second water supply valve on the buffer tank, and add water to the vacuum tank and the buffer tank respectively. When the water level reaches the set value, the first liquid level transmitter and the second liquid level transmitter transmit signals to the control cabinet respectively, and then close the first water supply valve and the second water supply valve, and then close the exhaust valve;

[0029] S3, start the centrifugal pump and suck fish:

[0030] Open the shut-off valve on the outlet pipe of the centrifugal pump, start the centrifugal pump, the centrifugal pump draws water from the vacuum tank to lower its liquid level, the pressure in the vacuum tank decreases, the fish-water mixture enters the fish-water separation component through the fish suction pipe, in the fish-water separation component, the water passes through the separation element and falls into the water receiving box and into the vacuum tank, the centrifugal pump discharges the water into the pool, the fish are counted in the holding box and slide into the fish inlet pipe, and enter the buffer tank;

[0031] S4. Fish sorting and grading:

[0032] Observe the gathering of fish in the buffer tank through a sight glass. When the density and amount of fish in the buffer tank meet the requirements, turn off the centrifugal pump, open the exhaust valve on the holding box to connect the system to the atmosphere, open the fish discharge valve on the fish discharge pipe, and close the shut-off valve on the outlet pipe of the centrifugal pump. The fish-water mixture in the buffer tank enters the fish grading device through the fish discharge pipe under the action of gravity, and the fish are graded in the fish grading device.

[0033] S5. After all the fish-water mixture in the buffer tank enters the fish grading device, the drain valve is opened, and after the water in the vacuum tank is drained, all valves are closed.

[0034] In some embodiments of the present application, when the height of the fish inlet of the fish grading device is higher than the height of the fish outlet at the bottom of the buffer tank, the buffer tank needs to be pressurized so that the fish are discharged into the fish grading device located at a high place under pressure 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 centrifugal pump is turned off, and the air outlet valve and the fish discharge valve are opened; the fish inlet valve and the shut-off valve on the outlet pipe of the centrifugal pump are closed, and the compressor is started. The compressor pressurizes the external gas and fills it into the buffer tank, and the buffer tank is pressurized. The fish-water mixture in the buffer tank enters the fish grading device through the fish discharge pipe under the action of the high-pressure gas;

[0035] In step S5, after all the fish-water mixture in the buffer tank enters the fish grading device, the compressor is turned off, the drain valve is opened, and after the water in the vacuum tank 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 replenishing water in the buffer tank is lower than the installation height of the fish inlet pipe.

[0037] Based on the above technical scheme, the live fish catching, counting and grading system and its working method of the present invention adopt an ordinary centrifugal pump, which reduces the cost of mechanical research and development; during the entire process of sucking and discharging fish, the fish do not pass through the running machinery, 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; after the fish in the buffer tank are gathered to a certain extent, the fish are discharged into the grading equipment, thereby achieving efficient and lossless catching, counting and grading of 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 This is a schematic diagram of the structure of a live fish capture counting and grading system according to an embodiment of the present invention;

[0042] Figure 2 It 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 box; 22. Separation element; 23. Fish suction pipe; 24. Exhaust pipe; 241. Exhaust valve; 25. Vacuum gauge; 26. Accommodation box; 30. Centrifugal pump; 31. Water inlet pipe; 32. Water outlet pipe; 322. Check valve; 323. Regulating valve; 324. Shut-off valve; 40. Vacuum tank; 41. First water supply pipe; 411. First water supply valve; 42. Water receiving pipe; 43. Vacuum Tank sight glass; 44. First liquid level transmitter; 45. Drain pipe; 451. Drain valve; 50. Buffer tank; 51. Fish inlet pipe; 511. Fish inlet valve; 52. Second water supply pipe; 521. Second water supply valve; 53. Buffer tank sight glass; 54. Second liquid level transmitter; 55. Fish discharge pipe; 551. Fish discharge valve; 56. Manhole; 60. Compressor; 61. Air inlet pipe; 62. Air outlet pipe; 621. Air outlet valve; 70. Fish grading device. DETAILED DESCRIPTION

[0045] 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. 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 making creative work 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", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] 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.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication 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.

[0049] The live fish capture counting and grading system in this embodiment is as follows: Figure 1-2 Shown, including

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

[0051] A vacuum tank 40, which is connected to the water outlet of the fish-water separation component 20 through a water receiving pipe 42. The vacuum tank 40 is used to buffer the water separated by the fish-water separation component 20. A first water supply pipe 41 connected to external water supply is provided above the vacuum tank 40. An emptying pipe 45 is provided at the bottom of the vacuum tank 40, and the emptying pipe 45 is connected to the drainage system;

[0052] The centrifugal pump 30, the water inlet pipe 31 of the centrifugal pump 30 is connected to the lower part of the vacuum tank 40, the water outlet pipe 32 of the centrifugal pump 30 is connected to the water pool, the centrifugal pump 30 is started, and the water in the vacuum tank 40 is discharged into the water pool through the water inlet pipe 31, the centrifugal pump 30, and the water outlet pipe 32 in sequence;

[0053] The buffer tank 50 is used to buffer the fish separated by the fish-water separation component 20. The buffer tank 50 is connected to the fish outlet of the fish-water separation component 20 through a fish inlet pipe 51. The top of the buffer tank 50 is connected to the external supply water through a second water supply pipe 52. The bottom of the buffer tank 50 is provided with a fish outlet, which is connected to a fish outlet pipe 55. The fish outlet pipe 55 is connected to the fish grading device 70.

[0054] The compressor 60 has an air inlet pipe 61 connected to the outside atmosphere, and an air outlet pipe 62 connected to the buffer tank 50. The compressor 60 extracts and pressurizes the outside air, and fills the buffer tank 50 with high-pressure gas through the air outlet pipe 62. The air outlet pipe 62 is provided with an air outlet valve 621.

[0055] A control cabinet (not shown in the figure) is connected to the centrifugal pump 30 and the compressor 60 by signals, and the control cabinet controls the valves of the live fish catching counting and grading system in a linkage manner;

[0056] The fish-water mixture enters the fish-water separation assembly 20 through the fish suction pipe 23, the fish enter the buffer tank 50, and then enter the fish grading device 70 for grading, and the water is discharged through the vacuum tank 40 and the centrifugal pump 30 in turn.

[0057] like Figure 1 As shown, a regulating valve 323 for regulating the flow of the centrifugal pump 30 is disposed on the outlet pipe 32 of the centrifugal pump 30 , and a shut-off valve 324 for controlling the connection between the outlet pipe 32 and the water pool is also disposed on the outlet pipe 32 .

[0058] like Figure 2 As shown, the fish-water separation component 20 includes a receiving box 26 and a water receiving box 21 located below the receiving box 26, a separator 22 is arranged between the receiving box 26 and the water receiving box 21, the separator 22 separates the fish-water mixture, the fish remain in the receiving box 26, and the water falls into the water receiving box 21; wherein the separator 22 is evenly provided with water drop holes, which can be rectangular or circular holes, and the aperture of the water drop holes is smaller than the minimum size of the fish body width; 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 water drop projection area of ​​the separator 22 is larger than the cross-sectional area of ​​the fish suction pipe 23; a counting device 10 is arranged on the receiving box 26, and the counting device 10 counts and counts the fish passing through the receiving box 26, and an exhaust pipe 24 connected to the outside atmosphere is also arranged on the receiving box 26, and an exhaust valve 241 is arranged on the exhaust pipe 24.

[0059] In order to allow the fish to enter the buffer tank 50 smoothly and avoid congestion in the holding box 26, Figure 2 As shown, the fish suction pipe 23 is connected to the water inlet end of the fish-water separation component 20, the fish inlet pipe 51 is connected to the fish outlet end of the fish-water separation component 20, the fish suction pipe 23 and the fish inlet pipe 51 are respectively located at the left and right ends of the receiving box 26, and the separator 22 is tilted downward from the end close to the fish suction pipe 23 to the end close to the fish inlet pipe 51; the water receiving box 21 is an inverted triangle structure, water is collected at the bottom of the water receiving box 21, and the bottom end of the water receiving box 21 is the water outlet end, and the water receiving pipe 42 of the vacuum tank 40 is connected to the water outlet end, which is conducive to timely discharge of water in the water receiving box 21 into the vacuum tank 40. A vacuum gauge 25 capable of measuring the vacuum degree in the receiving box 26 is also arranged above the receiving box 26.

[0060] See also Figure 1The cache tank 50 is provided with a plurality of cache tank mirrors 53 for observing fish. In the present embodiment, the number of the cache tank mirrors 53 is 1-3, so as to better observe the density and quantity of fish in the cache tank 50. The cache tank 50 is also provided with a second liquid level transmitter 54 to control the amount of replenishing water in the cache tank 50 to avoid excessive replenishing water. The bottom of the cache tank 50 is elliptical, dish-shaped or conical, so as to facilitate the discharge of fish water inside the cache tank 50.

[0061] The drain pipe 45 of the vacuum tank 40 is provided with a drain valve 451. When the drain valve 451 is opened, the water in the vacuum tank 40 is directly discharged into the drainage system. The vacuum tank 40 is also provided with a first liquid level transmitter 44 to control the amount of replenishing water in the vacuum tank 40 to avoid excessive replenishing water.

[0062] The water outlet pipe 32 of the centrifugal pump 30 is also provided with a shut-off valve 324 for controlling the connection between the water outlet pipe 32 and the water pool, and the shut-off valve 324 is arranged behind the regulating valve 323; the air outlet pipe 62 of the compressor 60 is provided with an air outlet valve 621, and when the air outlet valve 621 is opened, the compressor 60 fills the high-pressure air into the cache tank 50.

[0063] The centrifugal pump 30, the compressor 60, and all the valves mentioned above are connected to the control cabinet by signal and are controlled by the control cabinet.

[0064] As an embodiment of the present invention, when the buffer tank 50 discharges fish downward, that is, the fish grading device 70 is located below the buffer tank 50, the live fish catching counting and grading system works, including the following steps:

[0065] S1. Preparation:

[0066] 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 outlet valve 621 on the outlet pipe 62 of the compressor 60 and the fish discharge valve 551 at the bottom of the buffer tank 50 are closed, and the fish inlet valve 511 on the fish inlet pipe 51 and the exhaust valve 241 on the fish-water separation assembly 20 are opened to connect the system to the atmosphere;

[0067] S2, vacuum tank, buffer tank water replenishment:

[0068] Open the first water supply valve 411 on the first water supply pipe 41 of the vacuum tank 40 and the second water supply valve 521 on the second water supply pipe 52 of the buffer tank 50, and add water to the vacuum tank 40 and the buffer tank 50 respectively. When the water level reaches the set value, the first liquid level transmitter 44 and the second liquid level transmitter 51 transmit signals to the control cabinet respectively, and then the control cabinet closes the first water supply valve 411 and the second water supply valve 521, and then closes the exhaust valve 241;

[0069] S3, start the centrifugal pump and suck fish:

[0070] The shut-off valve 324 on the outlet pipe 32 of the centrifugal pump 30 is opened to start the centrifugal pump 30. The centrifugal pump 30 extracts the replenishing water in the vacuum tank 40 to lower its liquid level. The pressure in the vacuum tank 40 decreases, and the pressure in the fish-water separation component 20 also decreases accordingly. 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 separation element 22 and falls into the water receiving box 21 and into the vacuum tank 40. The centrifugal pump 30 discharges the water in the vacuum tank 40 into the pool through the water inlet pipe 31, the centrifugal pump 30, and the water outlet pipe 32. The fish are counted in the holding box 26 and slide into the fish inlet pipe 51 to enter the buffer tank 50.

[0071] S4. Fish sorting and grading:

[0072] The gathering of fish in the buffer tank 50 is observed through the buffer tank sight glass 53. When the fish density and amount in the buffer tank 50 meet the requirements, the centrifugal pump 30 is turned off, the exhaust valve 241 on the receiving box 26 is opened, so that the fish-water separation component 20 is connected to the atmosphere, and the buffer tank 50 is connected to the receiving box 26 through the fish inlet pipe 51, so that the buffer tank 50 is connected to the atmosphere, the fish discharge valve 551 on the fish discharge pipe 55 is opened, and the shut-off valve 324 on the outlet pipe 32 of the centrifugal pump 30 is closed. The fish-water mixture in the buffer tank 50 enters the fish grading device 70 through the fish discharge pipe 51 under the action of gravity, and the fish are graded in the fish grading device 70;

[0073] S5. After all the fish-water mixture in the buffer tank 50 enters the fish grading device 70, the drain valve 451 is opened, and after the water in the vacuum tank 40 is drained, all valves are closed.

[0074] As another embodiment of the present invention, when the buffer tank 50 discharges fish to a higher position, that is, the height of the fish inlet of the fish grading device 70 is higher than the height of the fish discharge port at the bottom of the buffer tank 50, it is necessary to pressurize the buffer tank 50 so that the fish are pressurized and discharged into the fish grading device 70 located at a higher position when rushing out of the fish discharge pipe 55. When the above-mentioned live fish catching counting and grading system is working, it includes the following steps:

[0075] S1. Preparation:

[0076] 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 outlet valve 621 on the outlet pipe 62 of the compressor 60 and the fish discharge valve 551 at the bottom of the buffer tank 50 are closed, and the fish inlet valve 511 on the fish inlet pipe 51 and the exhaust valve 241 on the fish-water separation assembly 20 are opened to connect the system to the atmosphere;

[0077] S2, vacuum tank, buffer tank water replenishment:

[0078] Open the first water supply valve 411 on the first water supply pipe 41 of the vacuum tank 40 and the second water supply valve 521 on the second water supply pipe 52 of the buffer tank 50, and add water to the vacuum tank 40 and the buffer tank 50 respectively. When the water level reaches the set value, the first liquid level transmitter 44 and the second liquid level transmitter 51 transmit signals to the control cabinet respectively, and then the control cabinet closes the first water supply valve 411 and the second water supply valve 521, and then closes the exhaust valve 241;

[0079] S3, start the centrifugal pump and suck fish:

[0080] The shut-off valve 324 on the outlet pipe 32 of the centrifugal pump 30 is opened to start the centrifugal pump 30. The centrifugal pump 30 extracts the replenishing water in the vacuum tank 40 to lower its liquid level. The pressure in the vacuum tank 40 decreases, and the pressure in the fish-water separation component 20 also decreases accordingly. 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 separation element 22 and falls into the water receiving box 21 and into the vacuum tank 40. The centrifugal pump 30 discharges the water in the vacuum tank 40 into the pool through the water inlet pipe 31, the centrifugal pump 30, and the water outlet pipe 32. The fish are counted in the holding box 26 and slide into the fish inlet pipe 51 to enter the buffer tank 50.

[0081] S4, start the compressor, discharge fish, and classify:

[0082] The gathering of fish in the buffer tank 50 is observed through the buffer tank sight glass 53. When the fish density and amount in the buffer tank 50 meet the requirements, the centrifugal pump 30 is turned off, the air outlet valve 621 on the air outlet pipe 62 of the compressor 60 is opened, and the fish discharge valve 551 at the bottom of the buffer tank 50 is opened; the fish inlet valve 511 and the shut-off valve 324 on the outlet pipe 32 of the centrifugal pump 30 are closed, and the compressor 60 is started. The compressor 60 inhales external air through the air inlet pipe 61 and pressurizes it, and then fills it into the buffer tank 50 through the air outlet pipe 62, pressurizing the buffer tank 50. The fish-water mixture in the buffer tank 50 enters the fish grading device 70 through the fish discharge pipe 55 under the action of the high-pressure gas;

[0083] S5. After all the fish-water mixture in the buffer tank 50 enters the fish grading device 70, the compressor 60 is turned off, the drain valve 451 is opened, and after the water in the vacuum tank 40 is completely drained, all valves are closed.

[0084] In the above two embodiments, in step S3, before the fish suction starts, the liquid level of the replenishing water in the buffer tank 50 is lower than the installation height of the fish inlet pipe 51.

[0085] The live fish catching, counting and grading system and the working method thereof adopt a common centrifugal pump, thereby reducing the cost of mechanical research and development; during the entire process of sucking and discharging fish, the fish do not pass through the running machinery, 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; after the fish in the buffer tank are gathered to a certain extent, the fish are discharged into the grading equipment, thereby realizing efficient and lossless catching, counting and grading of the fish; 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 controllable; the entire system has a simple structure, is easy to operate and has a low cost; the entire process of sucking and discharging fish has a high degree of automation and high reliability.

[0086] 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.

[0087] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A system for counting and grading live fish, characterized in that: include: 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 from the water; A vacuum tank, which is connected to the fish-water separation component through a water receiving pipe and is used to buffer the water separated by the fish-water separation component. A first water supply pipe connected to external water supply is provided above the vacuum tank, and an emptying pipe is provided at the bottom of the vacuum tank, and the emptying pipe is connected to a drainage system; A centrifugal pump, wherein a water inlet pipe of the centrifugal pump is connected to the bottom of the vacuum tank, a water outlet pipe of the centrifugal pump is connected to the water pool, and the centrifugal pump discharges the water in the vacuum tank into the water pool; A buffer tank, used for buffering the fish separated by the fish-water separation component, the buffer tank is connected to the fish-water separation component through a fish inlet pipe, and is connected to external supply water through a second water supply pipe, a fish discharge port is provided at the bottom of the buffer tank, the fish discharge port is connected to a fish discharge pipe, and the fish discharge pipe is connected to a fish grading device; A compressor, wherein an air inlet pipe of the compressor is connected to the outside atmosphere, an air outlet pipe is connected to the buffer tank, the compressor fills the buffer tank with high-pressure gas through the air outlet pipe, and an air outlet valve is provided on the air outlet pipe; A control cabinet is connected to the centrifugal pump and the compressor by signal, and the control cabinet is linked to control the valve of the live fish catching counting and grading system; The fish-water mixture enters the fish-water separation component through the fish suction pipe, the fish enter the buffer tank, and then enter the fish grading device for grading, and the water is discharged through the vacuum tank and the centrifugal pump in turn.

2. The live fish catching counting and grading system according to claim 1, characterized in that: 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 water pool.

3. The live fish catching counting and grading system according to claim 2, characterized in that: The fish-water separation component 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, 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, and an exhaust pipe connected to the outside atmosphere is also provided on the holding box, and an exhaust valve is provided on the exhaust pipe.

4. The live fish catching counting and grading 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 containing box, and the separating piece is inclined downward from an end close to the fish suction pipe to an end close to the fish inlet pipe.

5. The live fish catching counting and grading system according to claim 4, characterized in that: The water-falling projection area of ​​the separation element is larger than the cross-sectional area of ​​the fish-sucking 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 live fish catching counting and grading system according to claim 2, characterized in that: The cache tank is provided with a plurality of sight glasses capable of observing fish, and a second liquid level transmitter is also provided on the cache tank.

7. The live fish catching counting and grading system according to claim 6, characterized in that: The drain pipe of the vacuum tank is provided with a drain valve, and when the drain valve is opened, the water in the vacuum tank is discharged into the drainage system. The vacuum tank is also provided with a first liquid level transmitter; The outlet pipe of the centrifugal pump is also provided with a shut-off valve for controlling the connection between the outlet pipe and the water pool, and the shut-off valve is arranged behind the regulating valve; An air outlet valve is provided on the air outlet pipe of the compressor. When the air outlet valve is opened, the compressor fills the high-pressure air into the buffer tank.

8. A method for using any one of the live fish catching counting and grading systems according to claims 1 to 7, characterized in that: The steps include: S1. Preparation: Immerse the fish suction pipe in the fish-water mixture, adjust the regulating valve on the outlet pipe of the centrifugal pump to be fully open, close the shut-off valve on the outlet pipe of the centrifugal pump, close the outlet valve on the outlet pipe of the compressor and the fish discharge valve at the bottom of the buffer tank, open the fish inlet valve on the fish inlet pipe and the exhaust valve on the fish-water separation assembly; S2, vacuum tank, buffer tank water replenishment: Open the first water supply valve on the vacuum tank and the second water supply valve on the buffer tank, and add water to the vacuum tank and the buffer tank respectively. When the water level reaches the set value, the first liquid level transmitter and the second liquid level transmitter transmit signals to the control cabinet respectively, and then close the first water supply valve and the second water supply valve, and then close the exhaust valve; S3, start the centrifugal pump and suck fish: Open the shut-off valve on the outlet pipe of the centrifugal pump, start the centrifugal pump, the centrifugal pump draws water from the vacuum tank to lower its liquid level, the pressure in the vacuum tank decreases, the fish-water mixture enters the fish-water separation component through the fish suction pipe, in the fish-water separation component, the water passes through the separation element and falls into the water receiving box and into the vacuum tank, the centrifugal pump discharges the water into the pool, the fish are counted in the holding box and slide into the fish inlet pipe, and enter the buffer tank; S4. Fish sorting and grading: Observe the gathering of fish in the buffer tank through a sight glass. When the density and amount of fish in the buffer tank meet the requirements, turn off the centrifugal pump, open the exhaust valve on the holding box to connect the system to the atmosphere, open the fish discharge valve on the fish discharge pipe, and close the shut-off valve on the outlet pipe of the centrifugal pump. The fish-water mixture in the buffer tank enters the fish grading device through the fish discharge pipe under the action of gravity, and the fish are graded in the fish grading device. S5. After all the fish-water mixture in the buffer tank enters the fish grading device, the drain valve is opened, and after the water in the vacuum tank is drained, all valves are closed.

9. The working method of the live fish catching counting and grading system according to claim 8, characterized in that: In step S4, when the density and amount of fish in the buffer tank meet the requirements, the centrifugal pump is turned off, and the air outlet valve and the fish discharge valve are opened; the fish inlet valve and the shut-off valve on the outlet pipe of the centrifugal pump are closed, and the compressor is started. The compressor pressurizes the external gas and fills it into the buffer tank to pressurize the buffer tank. The fish-water mixture in the buffer tank enters the fish grading device through the fish discharge pipe under the action of the high-pressure gas; In step S5, after all the fish-water mixture in the buffer tank enters the fish grading device, the compressor is turned off, the drain valve is opened, and after the water in the vacuum tank is drained, all valves are closed.

10. The working method of the live fish catching counting and grading system according to claim 8 or 9, characterized in that: In step S3, before the fish suction begins, the liquid level of the replenishing water in the buffer tank is lower than the installation height of the fish inlet pipe.

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