A fish fry buffer system for aquaculture vessels

Abstract

This invention relates to a fish fry buffering system for aquaculture vessels. A box-type fish-water separator is connected at one end to the output pipeline of a live fish transport vessel, and at the other end to a fish fry buffer tank. The lower part of the box-type fish-water separator is hollowed out, allowing for rapid separation of fish fry and water through negative pressure provided by a vacuum water tank, while also capturing and counting the fish fry. The fish fry are then transferred to the fish fry buffer tank via inertial transport, while water flows into the vacuum water tank. The lower part of the fish fry buffer tank has a controllable opening and closing outlet, and the top is equipped with a seawater interface, an air extraction interface, a ventilation interface, a pressure interface, a compressed air interface, a pressure transmitter interface, and a manhole. The side walls are equipped with upper, middle, and lower liquid level switches, sight glasses, and overflow interfaces. A fish-blocking ball shell is installed inside the buffer tank, and several oxygen interfaces are located on the side walls of the fish fry buffer tank. Each oxygen interface is connected to a nano-aeration disc, and a fish-blocking ball shell is also installed at the location where the nano-aeration disc is installed. A bottom liquid level switch is located at the outlet of the fish fry buffer tank.

Description

Technical Field

[0001] This invention relates to a fish fry buffering system for aquaculture vessels, belonging to the field of aquaculture vessel technology. Background Technology

[0002] Each large aquaculture vessel has about 15 aquaculture tanks, each holding more than 120 tons of fish. Therefore, transferring fish fry to each aquaculture tank is a very important production issue, and the fish fry buffer tank in the fish fry loading system naturally plays a very important role in connecting the loading and unloading process.

[0003] Existing fish fry buffer tanks cause significant damage to the fish fry when they are placed inside. During the transfer process, the nutrient supply to the fish fry is uneven, and even oxygen deficiency can negatively affect the survival rate of the fish fry after they are placed inside the tank. Summary of the Invention

[0004] The purpose of this invention is to provide a fish fry buffer tank for aquaculture vessels. Live fish transport vessels bring live fish aboard and moor them to the aquaculture vessel. The aquaculture compartment on the live fish transport vessel is connected to the fish fry loading system using a temporary fish fry loading hose. The fish fry loading system is activated to first transfer the fish fry to the buffer tank, and then the fish fry are transferred from the buffer tank to the aquaculture compartment on the aquaculture vessel. In this process, the fish fry buffer tank plays a crucial role in bridging the gap between the transport vessel and the fry loading system. The fish fry buffer tank for aquaculture vessels of this invention addresses the technical problems mentioned in the background section.

[0005] The present invention adopts the following technical solution:

[0006] A fish fry buffering system for aquaculture vessels includes a box-type fish-water separator 21, a vacuum water tank 22, and a fish fry buffer box 1. One end of the box-type fish-water separator 21 can be connected to the output pipeline of a live fish transport vessel, and the other end is connected to the fish fry buffer box 1. The lower part of the box-type fish-water separator 21 is hollowed out, and the negative pressure provided by the vacuum water tank 22 quickly separates the fish fry and water, and records and counts the fish fry. The fish fry are transferred to the fish fry buffer box by inertia, while the water flows into the vacuum water tank 22. The fish fry buffer box 1 has a controllable opening and closing fish fry buffer box outlet 3 at the bottom and a top... The system is equipped with a seawater inlet 12, an air inlet 14, and a pressure inlet 15. Internally, it has an upper liquid level switch 4, a middle liquid level switch 5, and a lower liquid level switch 6. A bottom liquid level switch 7 is located at the outlet 3 of the fry buffer tank. Several oxygen inlets 19 are located on the side wall of the fry buffer tank 1, each connected to a nano-aeration disc 9. The nano-aeration disc 9 is covered by a flexible fish-blocking ball shell 8. Turning on the start button of the fry loading system enters the automatic operation mode, which consists of four steps: water injection, vacuuming, continuous fish suction, and fry transfer to the rearing tank.

[0007] Step 1, Water injection: The pneumatic butterfly valves at the aquaculture seawater interface 12 and the ventilation interface 14 are automatically opened until the oxygen-enriched water level in the fry buffer tank, vacuum water tank and box-type fish water separator reaches the upper liquid level switch 4, at which point the pneumatic butterfly valves at the aquaculture seawater interface 12 and the ventilation interface 14 are closed.

[0008] The second step is vacuuming: automatically open the pneumatic butterfly valve at pressure port 15, start the water ring vacuum pump to open the negative pressure, and the fish-water mixture enters the box-type fish-water separator 21.

[0009] The third step is continuous fish suction: the pneumatic butterfly valve and centrifugal pump at the outlet 23 of the vacuum water tank are automatically opened, while the water ring vacuum pump is automatically shut off. This allows the centrifugal pump at the outlet 23 of the vacuum water tank to achieve continuous pumping at a constant flow rate under a low and constant negative pressure. When the fish-to-water ratio in the fry buffer tank reaches a certain proportion, the pneumatic butterfly valve and centrifugal pump at the outlet 23 of the vacuum water tank are shut off simultaneously.

[0010] Step 4: Transferring Fish Fry to the Breeding Chamber: First, the pneumatic ball valve at oxygen interface 19 automatically opens to aerate the fish water in the fish fry buffer tank with pure oxygen through the nano-aeration disc 9 until the oxygen concentration in the fish water mixture in the fish fry buffer tank reaches a certain level. Then, the pneumatic butterfly valve at pressure interface 15 automatically opens, and the water ring vacuum pump starts to create positive pressure, adding positive pressure to the buffer tank. At the same time, the pneumatic gate valve at the outlet 3 of the fish fry buffer tank automatically opens, rapidly transferring the fish fry to the corresponding breeding chamber under the set positive pressure. When the liquid level of the fish water mixture in the buffer drops to the middle liquid level switch 5... When the aquaculture seawater interface 12 is activated, the pneumatic butterfly valve automatically opens to inject the aquaculture seawater, thereby reducing the fish-to-water ratio in the buffer tank and preventing the fry from being harmed during transportation due to excessive concentration. When the liquid level in the buffer tank drops to the lower liquid level switch 6, the pneumatic ball valve at the oxygen interface 19 automatically closes, and the nano aeration aeration disc 9 stops aeration. When the liquid level in the buffer tank drops to the bottom liquid level switch 7, after a set delay of several seconds, the pneumatic gate valve at the fry buffer tank outlet 3 automatically closes, and the pneumatic butterfly valve at the ventilation interface 14 automatically opens, initiating the next fry transfer.

[0011] Preferably, the fish fry buffer box 1 is equipped with a manhole 10 for easy regular cleaning and maintenance.

[0012] Preferably, sight glasses 11 are installed at different heights on the side wall of the fry buffer tank, which can be used to observe the state of the fry near the liquid surface in the buffer tank and the condition of the fry in the middle and lower part of the buffer tank from the height of the upper liquid level switch.

[0013] Preferably, the top of the fish fry buffer tank 1 is provided with a culture seawater interface 12, which is connected to a pneumatic butterfly valve and a culture seawater system in sequence to inject oxygen-enriched water into the fish fry buffer tank.

[0014] Preferably, the top of the fish fry buffer tank 1 is provided with a ventilation port 13. A pneumatic butterfly valve and a gooseneck tube are connected to the ventilation port 13 in sequence to directly connect to the atmosphere. When the system injects aquaculture water into the fish fry buffer tank, the pneumatic butterfly valve is automatically opened to keep the fish fry buffer tank at normal pressure.

[0015] Preferably, the top of the fry buffer tank 1 is equipped with an air extraction port 14, which is connected in sequence to a pneumatic butterfly valve and a water ring vacuum pump. This is used to evacuate the pipeline between the buffer tank, the waterline of the box-type fish-water separator, and the pipeline from the box-type fish-water separator to the transport compartment of the live fish transport ship in the fry loading system, ensuring that the system operates under negative pressure. The top of the fry buffer tank 1 is equipped with a pressure port 15, which is connected in sequence to a pneumatic butterfly valve and a water ring vacuum pump. This is used to pressurize the buffer tank in the fry loading system to promote the rapid transport of fry to the breeding compartment.

[0016] Preferably, the top of the fry buffer box 1 is equipped with a compressed air interface 16. The compressed air interface 16 is used to clean the conveying pipe between the fry buffer box and the aquaculture tank after all the fry have been transferred, along with the accompanying aquaculture seawater, to prevent the remaining fry in the pipe from dying and rotting, and from contaminating the aquaculture environment of the aquaculture tank during the next fry transfer. The top of the fry buffer box 1 is equipped with a pressure transmitter interface 17. The pressure transmitter installed at the pressure transmitter interface 17 detects the negative pressure and positive pressure values ​​in the fry buffer box and uploads them to the system for processing, so as to avoid harming the fry.

[0017] Preferably, the top of the fry buffer tank 1 is provided with an overflow port 18, which is connected to the vacuum water tank. During continuous pumping, the liquid level in the buffer tank is kept at the same height as the upper liquid level switch 4. The oxygen port 19 is installed with a pneumatic ball valve and the pipeline of the aquaculture oxygen system in sequence. After the continuous pumping is completed, the pneumatic ball valve automatically opens to oxygenate the fish-water mixture in the fry buffer tank through the nano aeration plate 9.

[0018] Preferably, the box-type fish-water separator 21 separates the fish and water. After separating the fish fry and water, the fish fry are transferred to the fish fry buffer box by inertia, and the water flows into the vacuum water tank. The vacuum water tank 22 receives the water separated by the fish-water separator and maintains continuous pumping of the system by adjusting the liquid level. The vacuum water tank outlet 23 is connected to the pneumatic butterfly valve and the centrifugal pump. Opening the pneumatic butterfly valve and the centrifugal pump maintains continuous pumping of the system.

[0019] Preferably, the mounting bases for the upper, middle, lower, and bottom liquid level switches are all horn-shaped.

[0020] The live fish transport vessel, carrying live fish, docks at the aquaculture vessel, which is then moored there. The aquaculture compartments on the live fish transport vessel are connected to the fry loading system using temporary fry loading hoses. The fry loading system is then activated to first transfer the fry to buffer tanks, and then the fry are transferred from the buffer tanks to the aquaculture compartments on the aquaculture vessel. In this process, the buffer tanks play a crucial role in bridging the gap between the transport and loading processes.

[0021] The beneficial effects of this invention are as follows: It provides a fish fry buffer tank, which minimizes damage to the fish fry when they are transferred from live fish transport ships to aquaculture ships, ensuring that the fish fry are transported in an orderly manner and with sufficient nutrition, thus greatly improving the efficiency of fish fry transfer and the survival rate. Attached Figure Description

[0022] Figure 1 This is the main view of the fish fry buffer system on the aquaculture vessel.

[0023] Figure 2 yes Figure 1 The cross-sectional views are shown at three sections, where (a) is the AA section view, (b) is the BB section view, and (c) is the CC section view.

[0024] Figure 3 This is a detailed diagram of the outlet of the fish fry buffer tank. (a) shows... Figure 2 (a) is a partial enlarged view, (b) is the A-direction view in (a), and (c) is the FF-direction sectional view in (a).

[0025] Figure 4 This is a detailed drawing of the mounting bracket for the liquid level switch.

[0026] Figure 5 This is a schematic diagram of the fish-blocking ball shell and the nano-aeration disc. (a) is a view with the nano-aeration disc, and (b) is a view without the nano-aeration disc.

[0027] Figure 6 This is a top view of the fish fry buffer box.

[0028] Figure 7 This is a schematic diagram of the longitudinal section of the fish fry buffer box.

[0029] In the diagram, 1. Fish fry buffer tank 1, 2. Fish fry inlet of the buffer tank, 3. Fish fry buffer tank outlet, 4. Upper liquid level switch installation interface, 5. Middle liquid level switch installation interface, 6. Lower liquid level switch installation interface, 7. Bottom liquid level switch installation interface, 8. Fish barrier ball shell, 9. Nano aeration disc, 10. Manhole, 11. Sight glass, 12. Attached aquaculture seawater interface, 13. Ventilation interface, 14. Air extraction interface, 15. Pressure interface, 16. Compressed air interface, 17. Pressure transmitter interface, 18. Overflow interface, 19. Oxygen interface, 20. Step, 21. Box-type fish-water separator, 22. Vacuum water priming tank, 23. Vacuum water priming outlet interface. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] First, the various components of this invention will be described as follows:

[0032] Fish fry buffer box 1:

[0033] See Figure 1 , 6 7. One effective solubility is 11m 3 The large-capacity fish fry box-type buffer box and the buffer box reinforcing rib plate are both welded from CCS235 or AH36 marine steel plates. The welding of the box body is all done by external full penetration welding and internal sealing welding. After welding, the welding slag and burrs are cleaned and polished smooth before proceeding to the next process.

[0034] Imported fish fry in buffer boxes, part 2:

[0035] See Figure 1 The buffer tank, connected to the box-type fish-water separator, has a flat rectangular inlet to maximize the effective solubility of the inlet and minimize damage to the fry. Furthermore, to prevent fry from accumulating at the inlet, the fry inlet of the buffer tank continues the box-type fish-water separator's design, entering the buffer tank at a 10° angle to the horizontal plane.

[0036] Fish fry buffer box outlet 3:

[0037] See Figure 1-2 To minimize damage to the fish fry, the fish fry buffer box has a base that is semi-circular at the top and flat at the bottom, resembling a city gate. The base is large while the outlet is small. The outlet end is converted into a round pipe for easy connection to the fish transport pipe.

[0038] Upper liquid level switch mounting interface 4:

[0039] See Figure 2 , 4When the aquaculture seawater in the buffer tank is automatically added to the level switch on component 4, the pneumatic butterfly valve at the aquaculture seawater interface 12 will automatically close.

[0040] Medium liquid level switch mounting interface 5:

[0041] See Figure 2 , 4 When the level of the fish-water mixture in the buffer tank drops to the middle level switch 5, the pneumatic butterfly valve at the aquaculture seawater interface 12 will automatically open to add aquaculture seawater into the buffer tank to prevent the fish fry density inside the buffer tank from being too high and scratching each other or lacking oxygen.

[0042] Lower liquid level switch mounting interface 6:

[0043] When the level of the fish-water mixture in the buffer tank drops to the lower level switch 6, the pneumatic ball valve at the oxygen interface 19 automatically closes, and the nano-aeration disc 9 stops aeration.

[0044] Bottom level switch mounting interface 7:

[0045] When the level of the fish-water mixture in the buffer tank drops to the bottom level switch 7, the pneumatic gate valve at the outlet 3 of the fish fry buffer tank will automatically close after a delay of about 5 seconds.

[0046] Fish barrier shell 8:

[0047] See Figure 5 The fish-blocking ball shell 8 is welded to the overflow port 18 and oxygen port 19 on the inner wall of the fish fry entry buffer box to prevent the fish fry entering the buffer box from being sucked on the overflow port and injured or hit by the nano-aeration plate during overflow.

[0048] Nano Aeration Disc 9:

[0049] See Figure 5 The nano aeration disc 9 mainly oxygenates the water in the buffer tank to prevent fish fry from dying due to lack of oxygen. The nano aeration disc is installed inside the fish barrier shell 8 to prevent injury to the fish.

[0050] Manhole 10:

[0051] See Figure 1 , 6 The manhole 10 on the buffer box is mainly used to facilitate the manufacture, regular cleaning and maintenance of the buffer box.

[0052] Sight mirror 11:

[0053] See Figure 1 The test mirror 11, installed on the side wall of the fish fry buffer tank, has two upper test mirrors that observe the state of the fish fry near the liquid surface inside the buffer tank when they enter the tank, and two lower test mirrors that observe the state of the fish fry in the middle and lower part of the buffer tank.

[0054] Appendix 12: Seawater interface for aquaculture

[0055] See Figure 6 The aquaculture seawater interface 12 is connected to a pneumatic butterfly valve and an aquaculture seawater system in sequence to inject oxygen-enriched water into the fish fry buffer tank.

[0056] Ventilation port 13:

[0057] See Figure 6 The ventilation ports are connected in sequence to a pneumatic butterfly valve and a gooseneck tube, which leads directly to the atmosphere. When the system injects aquaculture water into the fry buffer tank, it automatically opens the pneumatic butterfly valve to keep the fry buffer tank at normal pressure.

[0058] Air extraction port 14:

[0059] See Figure 6 The air extraction port 14 is connected in sequence to a pneumatic butterfly valve and a water ring vacuum pump, which is used to evacuate the pipelines above the waterline of the buffer box and the box-type fish-water separator in the fish fry loading system, as well as the pipelines from the box-type fish-water separator to the transport compartment of the live fish transport ship, to ensure that the system operates under negative pressure.

[0060] Pressure interface 15:

[0061] See Figure 6-7 The pressure port 15 is connected in sequence to a pneumatic butterfly valve and a water ring vacuum pump, which is used to pressurize the buffer box in the fish fry loading system to promote the rapid transport of fish fry to the breeding tank.

[0062] Compressed air interface 16:

[0063] See Figure 6-7 The compressed air interface 16 is used to clean the conveying pipe between the fry buffer box and the aquaculture chamber after all the fry have been transferred, along with the aquaculture seawater, to prevent the remaining fry in the pipe from dying and rotting, and from polluting the aquaculture environment of the aquaculture chamber during the next fry transfer.

[0064] Pressure transmitter interface 17:

[0065] See Figure 6-7 The pressure transmitter installed at pressure transmitter interface 17 detects the negative and positive pressure values ​​in the fish fry buffer box and uploads them to the system for processing to avoid harming the fish fry.

[0066] Overflow Interface 18:

[0067] See Figure 6 The overflow port 18 is connected to the vacuum priming tank to keep the liquid level in the buffer tank at the same height as the liquid level switch on component 4 during continuous pumping.

[0068] Oxygen interface 19:

[0069] See Figure 5At oxygen interface 19, pneumatic ball valves and the piping of the aquaculture oxygen system are installed in sequence. After continuous pumping is completed, the pneumatic ball valves automatically open to oxygenate the fish-water mixture in the fry buffer tank through the nano-aeration disc 9.

[0070] Step 20:

[0071] See Figure 2 Step 20 is the passageway to climb up to the fish fry buffer box, used for repairing valves, instruments and other equipment.

[0072] Box-type fish water separator 21:

[0073] See Figure 1 The box-type fish-water separator 21 separates the fish and water. After separating the fish fry and water, the fish fry are transferred to the fish fry buffer box by inertia, and the water flows into the vacuum water tank.

[0074] Vacuum water priming tank 22:

[0075] See Figure 1 The vacuum priming tank 22 receives the water separated by the fish water separator and maintains continuous pumping by adjusting the liquid level.

[0076] Vacuum water inlet / outlet interface 23

[0077] See Figure 6 The vacuum water tank outlet 23 is connected to a pneumatic butterfly valve and a centrifugal pump. Opening the pneumatic butterfly valve and the centrifugal pump keeps the system pumping continuously.

[0078] Press the start button on the fish fry loading system to enter automatic operation mode. The automatic operation mode consists of four steps: water injection, vacuuming, continuous fish suction, and fish fry transfer to the rearing tank.

[0079] Step 1, Water injection: The pneumatic butterfly valves at the aquaculture seawater interface 12 and the ventilation interface 14 are automatically opened until the oxygen-enriched water level in the fry buffer tank, vacuum water tank and box-type fish water separator reaches the upper liquid level switch 4, at which point the pneumatic butterfly valves at the aquaculture seawater interface 12 and the ventilation interface 14 are closed.

[0080] The second step is vacuuming: automatically open the pneumatic butterfly valve at pressure port 15, start the water ring vacuum pump to open the negative pressure, and the fish-water mixture enters the box-type fish-water separator 21.

[0081] The third step is continuous fish suction: the pneumatic butterfly valve and centrifugal pump at the outlet 23 of the vacuum water tank are automatically opened, while the water ring vacuum pump is automatically shut off. This allows the centrifugal pump at the outlet 23 of the vacuum water tank to achieve continuous pumping at a constant flow rate under a low and constant negative pressure. When the fish-to-water ratio in the fry buffer tank reaches a certain proportion, the pneumatic butterfly valve and centrifugal pump at the outlet 23 of the vacuum water tank are shut off simultaneously.

[0082] Step 4: Transferring Fish Fry to the Breeding Chamber: First, the pneumatic ball valve at oxygen interface 19 automatically opens to aerate the fish water in the fish fry buffer tank with pure oxygen through the nano-aeration disc 9 until the oxygen concentration in the fish water mixture in the fish fry buffer tank reaches a certain level. Then, the pneumatic butterfly valve at pressure interface 15 automatically opens, and the water ring vacuum pump starts to create positive pressure, adding positive pressure to the buffer tank. At the same time, the pneumatic gate valve at the outlet 3 of the fish fry buffer tank automatically opens, rapidly transferring the fish fry to the corresponding breeding chamber under the set positive pressure. When the liquid level of the fish water mixture in the buffer drops to the middle liquid level switch 5... When the aquaculture seawater interface 12 is activated, the pneumatic butterfly valve automatically opens to inject the aquaculture seawater, thereby reducing the fish-to-water ratio in the buffer tank and preventing the fry from being harmed during transportation due to excessive concentration. When the liquid level in the buffer tank drops to the lower liquid level switch 6, the pneumatic ball valve at the oxygen interface 19 automatically closes, and the nano aeration aeration disc 9 stops aeration. When the liquid level in the buffer tank drops to the bottom liquid level switch 7, after a set delay of several seconds, the pneumatic gate valve at the fry buffer tank outlet 3 automatically closes, and the pneumatic butterfly valve at the ventilation interface 14 automatically opens, initiating the next fry transfer.

[0083] In this embodiment, the top of the fish fry buffer tank 1 is provided with a culture seawater interface 12, which is connected to a pneumatic butterfly valve and a culture seawater system in sequence to inject oxygen-enriched water into the fish fry buffer tank.

[0084] In this embodiment, the top of the fish fry buffer tank 1 is provided with a ventilation port 13. A pneumatic butterfly valve and a gooseneck tube are connected to the ventilation port 13 in sequence to directly connect to the atmosphere. When the system injects aquaculture water into the fish fry buffer tank, the pneumatic butterfly valve is automatically opened to keep the fish fry buffer tank at normal pressure.

[0085] In this embodiment, the top of the fry buffer tank 1 is provided with an air extraction port 14, which is connected in sequence to a pneumatic butterfly valve and a water ring vacuum pump. This is used to evacuate the pipeline between the buffer tank, the waterline of the box-type fish-water separator, and the pipeline from the box-type fish-water separator to the transport compartment of the live fish transport ship in the fry loading system, ensuring that the system operates under negative pressure. The top of the fry buffer tank 1 is provided with a pressure port 15, which is connected in sequence to a pneumatic butterfly valve and a water ring vacuum pump. This is used to pressurize the buffer tank in the fry loading system to promote the rapid transport of fry to the breeding compartment.

[0086] In this embodiment, the top of the fry buffer box 1 is equipped with a compressed air interface 16. The compressed air interface 16 is used to clean the conveying pipe between the fry buffer box and the aquaculture tank after all the fry have been transferred, along with the aquaculture seawater, to prevent the remaining fry in the pipe from dying and rotting, and from polluting the aquaculture environment of the aquaculture tank during the next fry transfer. The top of the fry buffer box 1 is equipped with a pressure transmitter interface 17. The pressure transmitter installed at the pressure transmitter interface 17 detects the negative pressure and positive pressure values ​​in the fry buffer box and uploads them to the system for processing to avoid harming the fry.

[0087] In this embodiment, the top of the fry buffer tank 1 is provided with an overflow port 18, which is connected to the vacuum water tank. During continuous pumping, the liquid level in the buffer tank is kept at the same height as the upper liquid level switch 4. The oxygen port 19 is installed with a pneumatic ball valve and the pipeline of the aquaculture oxygen system in sequence. After the continuous pumping is completed, the pneumatic ball valve automatically opens to oxygenate the fish-water mixture in the fry buffer tank through the nano-aeration plate 9.

[0088] In this embodiment, the box-type fish-water separator 21 separates the fish and water. After separating the fish fry and water, the fish fry are transferred to the fish fry buffer box by inertia, and the water flows into the vacuum water tank. The vacuum water tank 22 receives the water separated by the fish-water separator and maintains continuous pumping of the system by adjusting the liquid level. The vacuum water tank outlet 23 is connected to the pneumatic butterfly valve and the centrifugal pump. Opening the pneumatic butterfly valve and the centrifugal pump maintains continuous pumping of the system.

[0089] The live fish transport vessel, carrying live fish, docks at the aquaculture vessel, which is then moored there. The aquaculture compartments on the live fish transport vessel are connected to the fry loading system using temporary fry loading hoses. The fry loading system is then activated to first transfer the fry to buffer tanks, and then the fry are transferred from the buffer tanks to the aquaculture compartments on the aquaculture vessel. In this process, the buffer tanks play a crucial role in bridging the gap between the transport and loading processes.

[0090] The interior of the buffer tank, the sealing surfaces of each flange, the pipes connecting the flange and the buffer tank, and the mounting base of the level switch are all made of non-toxic and odorless polyurea. The polyurea film thickness is ≥3mm. Polyurea has excellent elasticity and adhesion, making it more suitable for working conditions where negative and positive pressures alternate. Moreover, the polyurea surface is smooth and soft, making it less likely to damage fish.

[0091] To prevent the formation of air chambers due to poor drainage or venting of the level switch, which could cause it to malfunction, the mounting bases for the upper, middle, lower, and bottom level switches are all made of materials such as... Figure 4 Trumpet shape.

[0092] The buffer tank has a large capacity and can achieve continuous pumping even under very low vacuum conditions. This low vacuum and continuous pumping minimize damage to the fish when they are introduced into the tank. The interior of the buffer tank and flange connections are all protected with non-toxic and odorless polyurea. Polyurea has excellent elasticity and adhesion, perfectly suited to the buffer tank's operation during positive and negative transition periods. Furthermore, the smooth inner wall of the buffer tank after polyurea treatment reduces the risk of injury to the fish. Once the fish-water density in the buffer tank reaches a certain level, oxygenation is provided through an aeration plate to prevent oxygen deficiency in the fry within the tank or in the pipeline connecting the buffer tank to the rearing tank, thus significantly improving the survival rate of the fry upon introduction. A fish-blocking ball is added to the outlet of the buffer tank's inner wall to prevent fry from being sucked in at the connection between the buffer tank and the vacuum water tank, thus preventing injury to the fry, or from the aeration plate hitting the fry. The level switch mounting bases on the buffer tank are all horn-shaped to prevent air accumulation at the interface or insufficient drainage, which could cause level switch distortion or even malfunction. The buffer box has four viewing holes, allowing people to observe the fish and water inside from the side of the machine.

[0093] In summary, this invention provides a fish fry buffer compartment that minimizes damage to fish fry when they are transferred from live fish transport vessels to aquaculture vessels. The fish fry are transported in an orderly manner with sufficient nutrition, significantly improving the efficiency of fish fry transfer and survival rate.

Claims

1. A fish larvae hatchery ship fish larvae into the hatch system, characterized in that: including box fish water separator (21), vacuum water tank (22), fish larvae storage box (1); The box fish water separator (21) is connected to the output pipeline of the live fish transport ship at one end, and the other end is connected to the fish larvae storage box (1); The box fish water separator (21) is hollow at the lower part, and the fish larvae and water are quickly separated by the negative pressure provided by the vacuum water tank (22) and counted, and the fish larvae are transported to the fish larvae storage box by inertia, and the water flows into the vacuum water tank (22); The fish larvae storage box (1) is provided with a controllable opening and closing fish larvae storage box outlet (3) at the lower part, and is provided with a breeding seawater interface (12), a ventilation interface (13) and a pressure interface (15) at the top, and is provided with an upper liquid level switch (4), a middle liquid level switch (5) and a lower liquid level switch (6) inside, and is provided with a bottom liquid level switch (7) at the fish larvae storage box outlet (3); A plurality of oxygen interfaces (19) are arranged on the side wall of the fish larvae storage box (1), and a nanometer aeration disc (9) is received in the oxygen interface (19), and a flexible material fish ball shell (8) is arranged outside the nanometer aeration disc (9); The fish larvae storage box (1) is provided with a pressure interface (15) at the top, the pressure interface (15) is connected to a pneumatic butterfly valve and a water ring vacuum pump in sequence, and is used for pressurizing the fish larvae storage box in the fish larvae into the hatch system to promote the rapid transportation of the fish larvae to the breeding cabin; The fish larvae storage box (1) is provided with an air outlet interface (14) at the top, the air outlet interface (14) is connected to a pneumatic butterfly valve and a water ring vacuum pump in sequence, and ensures that the system operates in a negative pressure state; The fish larvae storage box (1) is provided with a compressed air interface (16) at the top, the compressed air interface (16) is used for cleaning the conveying pipeline between the fish larvae storage box and the breeding cabin after all the fish larvae are transported, so as to prevent the residual fish larvae in the pipeline from dying, rotting and polluting the breeding environment of the breeding cabin in the next fish larvae transportation; The fish larvae storage box (1) is provided with a pressure transmitter interface (17) at the top, and a pressure transmitter installed at the pressure transmitter interface (17) detects the negative pressure and positive pressure value in the fish larvae storage box and uploads it to the system for processing, so as to avoid hurting the fish larvae; Start the start button of the fish larvae into the hatch system to enter the automatic operation mode, and the automatic operation mode is divided into four steps: water injection, vacuum pumping, continuous fish suction and fish larvae transportation to the breeding cabin: First, water injection: automatically open the pneumatic butterfly valve at the breeding seawater interface (12) and the ventilation interface (13), until the oxygen-rich water level in the fish larvae storage box, the vacuum water tank and the box fish water separator reaches the upper liquid level switch (4), then close the pneumatic butterfly valve at the breeding seawater interface (12) and the ventilation interface (13); Second, vacuum pumping: automatically open the pressure interface (15) pneumatic butterfly valve, start the water ring vacuum pump to open the negative pressure, and the fish water mixture enters the box fish water separator (21); Third step, continuous pumping fish: automatically open the vacuum water tank outlet (23) of the pneumatic butterfly valve and centrifugal pump, while automatically closing the water ring vacuum pump; the system in a lower vacuum and constant negative pressure state, the centrifugal pump at the vacuum water tank outlet (23) to achieve constant flow of continuous pumping; when the ratio of fish to water in the fry buffer tank reaches a certain proportion, the pneumatic butterfly valve and centrifugal pump at the vacuum water tank outlet (23) are closed at the same time; Fourth step: fry transfer to the culture tank: first, the oxygen interface (19) of the pneumatic ball valve is automatically opened to give the fish water in the fry buffer tank pure oxygen through the nano aeration disc (9), until the oxygen concentration in the water reaches a certain level, the pneumatic butterfly valve at the pressure interface (15) is automatically opened, the water ring vacuum pump is opened to positive pressure, and the buffer tank is given positive pressure; at the same time, the pneumatic gate valve at the fry buffer tank outlet (3) is automatically opened to transfer the fry to the corresponding culture tank under the set positive pressure; when the liquid level in the buffer tank drops to the middle liquid level switch (5), the auxiliary culture seawater interface (12) pneumatic butterfly valve is automatically opened to inject auxiliary culture seawater, thereby reducing the fish to water ratio in the buffer tank, thereby avoiding the harm to fry due to too high concentration during transportation; when the liquid level in the buffer tank drops to the lower liquid level switch (6), the oxygen interface (19) of the pneumatic ball valve is automatically closed, and the nano aeration disc (9) stops aeration; when the liquid level in the buffer tank drops to the bottom liquid level switch (7), the pneumatic gate valve at the fry buffer tank outlet (3) is automatically closed after a delay of a certain number of seconds, the pneumatic butterfly valve at the aeration interface (13) is automatically opened, and the next fry transfer is started.

2. The fish farming vessel system of claim 1, wherein: The fry buffer tank (1) is provided with a manhole (10) for convenient regular cleaning and maintenance.

3. The fish farming vessel system of claim 1, wherein: The fry buffer tank (1) is provided with a manhole (10) for convenient regular cleaning and maintenance.

4. The fish farming vessel system of claim 1, wherein: The fry buffer tank (1) is provided with a manhole (10) for convenient regular cleaning and maintenance.

5. The fish farming vessel system of claim 1, wherein: The fry buffer tank (1) is provided with a manhole (10) for convenient regular cleaning and maintenance.

6. The fish farming vessel system of claim 1, wherein: The fry buffer tank (1) is provided with a manhole (10) for convenient regular cleaning and maintenance. The fry buffer tank (1) is provided with a manhole (10) for convenient regular cleaning and maintenance.

7. The fish farming vessel system of claim 1, wherein: The box type fish-water separator (21) separates fish and water, and after the fry and water are separated, the fry is transported to the fry buffer tank by inertia, and the water flows into the vacuum water guide tank; the vacuum water guide tank (22) receives the water separated by the fish-water separator, and continuously pumps the system by adjusting the liquid level; the water outlet interface (23) of the vacuum water guide tank is connected with the pneumatic butterfly valve and the centrifugal pump, and the pneumatic butterfly valve and the centrifugal pump are opened to keep the system continuously pumping.

8. The fish farming vessel system of claim 1, wherein: The upper, middle, lower and bottom liquid level switch mounting bases are all in the shape of a horn.

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