Air supplementing and feeding method and system suitable for swimming bladder fishes

Abstract

The invention relates to the technical field of deep sea aquaculture, in particular to an air supplementing and feeding method and system suitable for swimming bladder fishes. A pneumatic type bait casting device is used for conducting air supplementing and feeding on swimming bladder fishes in a deep-sea breeding box, the pneumatic type bait casting device comprises a high-pressure fan, a venturi pipeline and a bait conveying pipe which are sequentially connected, and the venturi pipeline is further communicated with a bait storage bin. The high-pressure fan is communicated with the bait storage bin through the pressure compensation pipe to balance the pressure difference between the bait storage bin and the Venturi pipeline, so that the bait can enter the Venturi pipeline from the bait storage bin; after the high-pressure fan is started and lasts for a set time, bait is conveyed into the Venturi pipeline according to the feed-gas ratio of (12-20): 1, high-pressure gas is used as a conveying medium, and both dry feed and live feed can be used for feeding; an air supplementing device does not need to be additionally arranged, the equipment cost is reduced, and the air supplementing and feeding requirements of the laryngeal fishes such as salmons in the large deep-sea aquaculture box can be met.

Description

Technical Field

[0001] This invention relates to the field of deep-sea aquaculture technology, and in particular to a method and system for supplementing air and feeding fish with a swim bladder. Background Technology

[0002] Throat-bladder fish are fish with specialized swim bladders or throat bladders that can produce sound. Salmon are throat-bladder fish and need to frequently surface to swallow air to replenish the gas lost from their swim bladders and maintain their buoyancy balance.

[0003] Traditional nearshore salmon farming faces numerous challenges, such as ecological red line restrictions, severe eutrophication in nearshore waters, and excessive nitrogen content in sediments, leading to prominent disease problems, increased fish mortality, and higher treatment costs. Furthermore, climate vulnerability also affects salmon growth; abnormally high water temperatures can cause growth stagnation or even yield losses. Therefore, salmon farming is gradually shifting towards deeper waters.

[0004] In deep-sea aquaculture, the sinking net cages, operating under harsh natural conditions, prevent salmon from accessing air, leading to slower growth and even deformities. While conventional hydraulic feeding systems are widely used in deep-sea aquaculture, they don't provide adequate air supply for the salmon, necessitating additional aeration devices.

[0005] Chinese patent CN111869618A discloses an air replenishment device for a sinkable fish cage. The device replenishes air and feeds the cage by setting up an air replenishment hood and a main air replenishment pipe and a main feed pipe on the air replenishment hood. Although it can achieve additional air replenishment, the overall structure is complex, which increases the complexity of system operation and maintenance costs.

[0006] Pneumatic feeding systems deliver feed via gas and are currently mostly used in aquaculture areas with low wind speeds, such as ponds or nearshore waters. In deep-sea areas, strong winds and high waves can cause feed to be carried away, reducing feeding rates; therefore, there are currently no precedents for using pneumatic feeding systems in deep-sea aquaculture. Summary of the Invention

[0007] To address the shortcomings of the existing technologies, this invention provides a method and system for supplementing and feeding fish in deep-sea environments with strong winds and rough waves. This method utilizes high-pressure gas as a transport medium to deliver feed, and the high-pressure gas atomizes in the water to form microbubbles, which serve as the gas source.

[0008] On one hand, the present invention provides a method for supplementing air and feeding fish suitable for larval swim bladder fish. The method uses a pneumatic feeding device to supplement air and feed larval swim bladder fish in a deep-sea aquaculture tank. The pneumatic feeding device includes a high-pressure blower, a Venturi pipe and a feed delivery pipe connected in sequence. The Venturi pipe is also connected to a feed storage bin. The high-pressure blower is connected to the feed storage bin through a pressure compensation pipe. The method for supplementing air and feeding includes the following steps: After the bait is fed into the bait storage bin, the bait storage bin is sealed, so that the bait storage bin and the Venturi tube form a closed channel; After the high-pressure blower is started and maintained for a set time, the bait storage bin delivers bait to the Venturi pipe at a feed-to-air ratio of (12-20):1. The high-pressure gas generated by the high-pressure blower mixes with the bait in the Venturi pipe. At the same time, some of the high-pressure gas enters the bait storage bin through the pressure compensation pipe to balance the pressure difference between the bait storage bin and the Venturi pipe, so that the bait can enter the Venturi pipe from the bait storage bin. The mixed high-pressure gas and the feed are transported to the deep-sea aquaculture tank through the feed delivery pipe. The high-pressure gas enters the water and forms microbubbles as a gas source to replenish the gas supply to the swim bladder fish. The feed is then fed to the swim bladder fish.

[0009] This technical solution provides a method for supplementing and feeding aerobic fish, which utilizes high-pressure gas as a transport medium and can feed both dry and live feed. It eliminates the need for additional aerosol devices, reducing equipment costs and meeting the aerosol and feeding needs of salmon and other aerobic fish in large deep-sea aquaculture tanks.

[0010] In some embodiments of this application, a feed buffer zone is formed inside the deep-sea aquaculture tank with the feed outlet as the origin and a certain distance from the feed outlet as the radius. After the feed is discharged from the feed outlet of the feed delivery pipe, the water in the feed buffer zone buffers and slows down the feed. The swim bladder fish feed on the slowed-down feed outside the feed buffer zone.

[0011] In some embodiments of this application, the radius of the bait buffer zone Calculated according to formula (1): (1) Where 'a' is a fixed coefficient. The velocity of the bait as it leaves the bait delivery pipe. The speed of the bait after it has passed through the bait buffer zone and slowed down.

[0012] In some embodiments of this application, the air supply Q of the high-pressure blower is calculated according to formula (2): (2) Where b is an empirical coefficient, ρ 空气 V is the air density, V is the water volume of the deep-sea aquaculture tank, η is the efficiency of the high-pressure blower, h is the depth of the discharge port in the deep-sea aquaculture tank, and (0.1h+1) is the depth correction factor.

[0013] In some embodiments of this application, the daily feed rate F of the feed conveying device is:

[0014] Among them, W t t represents the body weight of the fish at time t, reflecting the growth status of the fish during the breeding cycle; k is the daily feed rate, representing the proportion of feed amount to the fish's body weight.

[0015] On the other hand, this application also provides an aeration and feeding system suitable for fish with swim bladders, comprising: A bait storage device includes a bait storage bin and a feeding assembly connected to the bait storage bin for conveying bait into the bait storage bin; A conveying device includes a feeding cylinder and a feeding assembly disposed inside the feeding cylinder, the feeding cylinder being connected to the bait storage bin; A pneumatic feeding device, located below the feeding assembly, includes a high-pressure blower, a venturi pipe, and a bait delivery pipe connected in sequence. The venturi pipe is also provided with a bait interface connected to the feeding cylinder. The feeding assembly delivers the bait in the feeding cylinder to the venturi pipe through the bait interface. The bait mixes with the high-pressure airflow generated by the high-pressure blower in the venturi pipe and then enters the bait delivery pipe. The high-pressure blower is also connected to the bait storage bin by a pressure compensation pipe. Some of the high-pressure gas generated by the high-pressure blower enters the bait storage bin through the pressure compensation pipe to compensate for the pressure difference between the bait storage bin and the Venturi pipe.

[0016] In some embodiments of this application, a cooling pipe is provided between the high-pressure blower and the Venturi pipe, and the cooling pipe cools the high-pressure airflow blown out by the high-pressure blower; The pressure compensation pipe connects the cooling pipe to the storage chamber.

[0017] In some embodiments of this application, the feeding assembly includes a feeding cylinder, a suction pipe, a feeding tube, and a blower. A valve is provided between the feeding cylinder and the bait storage bin. One end of the suction pipe is located inside the feeding cylinder and the other end is connected to the blower. One end of the feeding tube is located inside the feeding cylinder and the other end is connected to the external bait bin. The exhaust fan draws air from the feeding cylinder through the suction pipe, creating a negative pressure inside the feeding cylinder. The bait in the bait storage bin then enters the feeding cylinder through the feeding pipe.

[0018] In some embodiments of this application, the bait storage device, the conveying device, and the pneumatic feeding device are integrated into a skid-mounted container.

[0019] In some embodiments of this application, the gas replenishment and feeding system includes a control system, the control system comprising: PLC controller; The monitoring module is used to monitor the gas content in the deep-sea aquaculture tank, collect the air pressure and feed feeding speed in the feed delivery pipe during the feeding process, obtain information on feed shortage status and high-pressure blower operation status, and generate corresponding equipment alarm information. The data transmission and storage module is connected to Alibaba Cloud via the Internet of Things to upload the actual operation information and device alarm information to the corresponding database of Alibaba Cloud for storage. The remote interaction module connects the database to the mobile terminal via a network, allowing users to remotely view the actual operating information, equipment alarm information, and feeding scheme parameters, and supports remotely sending feeding parameter adjustment commands to the PLC controller. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram showing the positional relationship between the pneumatic feeding device and the bait storage bin according to an embodiment of the present invention; Figure 2 This is a schematic diagram showing the positional relationship between the pneumatic feeding device and the deep-sea aquaculture tank according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the feed buffer zone inside the deep-sea aquaculture tank according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the air replenishment and feeding system according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the bait storage device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the external structure of the conveying device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the feeding assembly according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the feeding assembly from another perspective according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the buffer distributor according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the air replenishment and feeding system of this invention installed inside a skid-mounted container, according to an embodiment of the invention. In the picture: 10. Pneumatic feeding device; 20. Feed storage device; 30. Deep-sea aquaculture box; 40. Conveying device; 50. Skid-mounted container; 11. High-pressure blower; 12. Venturi tube; 13. Feed conveying pipe; 14. Buffer distributor; 111. Pressure compensation pipe; 112. Cooling pipe; 121. Feed inlet; 21. Bait storage bin; 22. Feeding assembly; 23. Valve; 221. Feeding cylinder; 222. Suction pipe; 223. Feeding pipe; 31. Bait buffer zone; 41. Feed cylinder; 411. Feed cylinder inlet; 42. Feeding assembly; 421. First turntable; 4211. Material receiving trough; 422. Rotary sealing feeding assembly; 4221. Feeding cylinder; 4222. Discharge inlet; 4223. Discharge outlet; 4224. Second turntable; 4225. Discharge chute; 43. Drive motor; 431. Rotating shaft. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Current pneumatic feeding devices 10 are mainly used in ponds or nearshore aquaculture areas, where feed is simply scattered onto the water surface. However, in deep-sea aquaculture areas with large waves, the feed scattered onto the surface is blown away, reducing the feeding rate. Furthermore, for deep-sea aquaculture tanks 30, which are located at a certain depth, the existing method of scattering feed onto the surface is insufficient to feed the fish inside the tank. Since pneumatic feeding devices deliver feed via gas, fish like salmon that feed on gill bladders need to replenish the gas lost from their swim bladders. As an exemplary embodiment of this application, a method for supplementing air and feeding throat bladder fish is provided. A pneumatic feeding device 10 is used to supplement air and feed the throat bladder fish in a deep-sea aquaculture tank 30. Figures 1-2 As shown, the pneumatic feeding device 10 includes a high-pressure blower 11, a venturi pipe 12 and a feed delivery pipe 13 connected in sequence. The venturi pipe 12 is also connected to the feed storage bin 21. The high-pressure blower 11 is connected to the feed storage bin 21 through a pressure compensation pipe 111. The method of using the above-mentioned pneumatic feeding device for both air replenishment and feeding includes the following steps: S1. Load the feed storage chamber 21 with feed. After loading, seal the feed storage chamber 21 to form a closed channel between the feed storage chamber 21 and the Venturi pipe 12. The high-pressure gas generated by the high-pressure blower can only be transported to the deep-sea aquaculture tank 30 through the Venturi pipe 12 and the feed delivery pipe 13. There will be no gas leakage at the feed storage chamber 21. This will prevent insufficient pressure in the feed delivery pipe 13 and ensure that the feed can be delivered to the deep-sea aquaculture tank 30. It should be noted that the feed delivery pipe 13 of the pneumatic feeding device 10 should be lowered into the deep-sea aquaculture tank 30, and the lower end of the feed delivery pipe 13 outlet 131 should be fixed inside the deep-sea aquaculture tank 30 to prevent the feed delivery pipe 13 from moving during feeding, which would cause the feed to be inaccurately delivered and increase the feed waste rate.

[0026] Because the water pressure outside the underwater bait delivery pipe 13 is greater than the air pressure inside the pipe, water will enter part of the underwater bait delivery pipe 13 from the outlet 131. Therefore, this part of the water in the bait delivery pipe 13 needs to be flushed out before the bait is delivered. S2. Start the high-pressure blower 11 and continue for a set time. At this time, the high-pressure gas generated by the high-pressure blower 11 passes through the Venturi pipe 12 and the bait delivery pipe 13 in sequence to flush out the water at the bottom of the bait delivery pipe 13. Since the bait storage chamber 21 has been sealed in step S1, the air pressure in the bait delivery pipe 13 is sufficient to flush out the water at its bottom. In actual operation, the high-pressure blower 11 is turned on for 15-20 seconds to ensure that all the water in the feed delivery pipe 13 is flushed out. During this period, the high-pressure gas is introduced into the deep-sea aquaculture tank 30 and forms microbubbles as a gas source to replenish the gas of the swim bladder fish.

[0027] Based on the growth process of salmon, the feed particle size is between 5-14mm, and the density is slightly higher than that of seawater.

[0028] The bait storage chamber 21 delivers bait to the Venturi pipe 12 at a feed-to-air ratio of (12-20):1. The bait mixes with the high-pressure gas generated by the high-pressure blower 11 in the Venturi pipe 12. At the same time, some of the high-pressure gas enters the bait storage chamber 21 through the pressure compensation pipe 111 to balance the pressure difference between the bait storage chamber 21 and the Venturi pipe 12. Since the bait storage chamber 21 is sealed at this time, while there is high-pressure gas in the Venturi pipe 12, in order to prevent the bait from being sucked back into the bait storage chamber 21 from the Venturi pipe 12, the pressure compensation pipe 111 is set up so that the pressure of the bait storage chamber 21 and the Venturi pipe 12 is the same, and the bait can smoothly enter the Venturi pipe 12 from the bait storage chamber 21. The high-pressure gas and feed mixed in the Venturi pipe 12 are transported to the deep-sea aquaculture tank 30 along the feed delivery pipe 13. The high-pressure gas enters the water to form microbubbles as a gas source to replenish the gas of the swim bladder fish, and the feed is used to feed the swim bladder fish.

[0029] The above-mentioned aeration and feeding method uses high-pressure gas as a transport medium, and both dry and live feed can be fed. No additional aeration device is required, which reduces equipment costs and can meet the aeration and feeding needs of salmon and other gudgeon fish in large deep-sea aquaculture tanks.

[0030] In some embodiments, within the deep-sea aquaculture tank 30, a feed buffer zone 31 is formed with the feed outlet 131 as the origin and a radius extending a certain distance from the feed outlet 131. Figure 3 As shown, after the bait is ejected from the outlet 131 of the bait conveying pipe 13, the water in the bait buffer zone 31 buffers and slows down the bait, and the throat bladder fish eat the slowed-down bait outside the bait buffer zone 31.

[0031] Unlike traditional pneumatic throwing and hydroelectric feeding, the pneumatic feeding method in this embodiment delivers the feed directly to the feeding area, i.e., the deep-sea aquaculture tank. The feed is transported over a long distance under high pressure and is at high speed. Tests have shown that when the length of the feed delivery pipe 13 is (25-30) m, the feed rushes out of the outlet 131 at a speed of (15-19) m / s, which can cause fatal damage to the farmed fish. A feed buffer zone 31 is set up to slow down the feed by using the water resistance in the area. The farmed fish feed outside the feed buffer zone 31 to ensure feeding safety.

[0032] In some embodiments, the radius of the bait buffer zone 31 Calculated according to formula (1): (1) Where 'a' is a fixed coefficient, obtained through experimentation; The velocity of the bait as it leaves the outlet 131 of the bait delivery pipe. The speed of the bait after it passes through the bait buffer zone 31 and is slowed down.

[0033] In some embodiments, when the length of the feed delivery pipe 13 is (25-30m), the velocity of the feed leaving the outlet 131 is... The speed at which the bait, after passing through the bait buffer zone 31, does not cause impact damage to the fish is (15-19) m / s. The value is (0-1.2) m / s; the value of the fixed coefficient 'a' can be calculated from experimental data. In this embodiment, the fixed coefficient 'a' is 23.36, from which the radius of the bait buffer zone can be calculated. Determine the range of the bait buffer zone 31.

[0034] Inside the deep-sea aquaculture tank 31, a grid with a aperture smaller than that of the farmed fish is used to create a feed buffer zone 31, which isolates the farmed fish outside the grid and allows them to feed and receive aeration outside the feed buffer zone 31.

[0035] In some embodiments, the air supply capacity Q of the high-pressure blower 11 is calculated according to formula (2): (2) Where b is an empirical coefficient. air density, V is the fish stocking density in the deep-sea aquaculture tank, V is the water volume of the deep-sea aquaculture tank 30, η is the efficiency of the high-pressure blower 11, h is the depth of the discharge port 131 in the deep-sea aquaculture tank 30, and (0.1h+1) is the depth correction factor.

[0036] In this embodiment, the empirical coefficient b for farmed salmon is 0.004, representing the proportion of air supplementation per kg of salmon. It is 1.29 kg / m 3 , 20 kg / m 3 The air supply volume Q can be calculated based on the actual water volume V of the deep-sea aquaculture tank, the efficiency η of the high-pressure blower 11, and the depth h of the discharge port 131.

[0037] In some embodiments, the daily feed requirement for farmed salmon, i.e., the daily feed intake F, is: (3) Among them, W t t represents the body weight of the fish at time t, in grams, reflecting the fish's growth during the rearing cycle; k represents the daily feed rate, in % / day, indicating the proportion of feed given to the fish's body weight.

[0038] In some embodiments, Wt in formula (3) is calculated using a growth model formula for fish with a throat bladder: (4) Where SGR is the specific growth rate, in % / day, representing the relative growth rate of the weight of the throat bladder fish per unit time; Δt is the time interval, in days, i.e. the time period for calculating growth; and Lnw is the natural logarithm of the initial weight of the throat bladder fish.

[0039] On the other hand, some embodiments of this application also provide an air-supplementing and feeding system suitable for fish with swim bladders, such as... Figure 4 As shown, the system includes a feed storage device 20, a conveying device 40, and a pneumatic feeding device 10, connected sequentially from top to bottom. The feed storage device 20 is used to store feed. The conveying device 40 transports the feed from the feed storage device 20 to the pneumatic feeding device 10. The pneumatic feeding device 10 uses high-pressure gas to transport the feed to the deep-sea aquaculture tank 30. The high-pressure gas enters the water and forms microbubbles, which serve as an air source to supplement the aeration of the swim bladder fish. The feed is used to feed the swim bladder fish.

[0040] In some embodiments, such as Figure 5 As shown, the bait storage device 20 includes a bait storage bin 21 and a feeding assembly 22 connected to the bait storage bin 21 for conveying bait into the bait storage bin 21; Specifically, the feeding assembly 22 includes a feeding cylinder 221, a suction pipe 222, a feeding pipe 223, and a blower (not shown in the figure). A valve 23 is provided between the bottom of the feeding cylinder 221 and the bait storage bin 21. One end of the suction pipe 222 is located inside the feeding cylinder 221 and the other end is connected to the blower. One end of the feeding pipe 223 is located inside the feeding cylinder 221 and the other end is connected to the external bait bin. Furthermore, such as Figure 5 As shown, the air inlet of the suction pipe 222 enters from the bottom of the feeding cylinder 221 and is located near the side wall of the feeding cylinder 221, with the air inlet port located near the inner wall of the top cover; the feeding pipe 223 enters from the top of the feeding cylinder 221, with the discharge port and the air inlet port spaced a certain distance apart to prevent the bait from directly entering the suction pipe 222 after it comes out of the feeding pipe 223.

[0041] When feeding is required in the feeding cylinder 221, the exhaust fan is started. The exhaust fan draws air out of the feeding cylinder 221 through the suction pipe 222, creating a negative pressure inside the feeding cylinder 221. The bait in the external bait bin enters the feeding cylinder 221 through the feeding pipe 223.

[0042] In some embodiments, the valve 23 between the bottom of the feeding cylinder 221 and the bait storage bin 21 is a gate valve. When the feeding cylinder 221 needs to be fed, the gate valve is in the closed state. When the feeding cylinder 221 is full of bait, the gate valve is opened to allow the bait to enter the bait storage bin 21.

[0043] In some embodiments, the bait storage bin 21 is also provided with an observation window 211, through which staff can observe the amount of bait stored in the bait storage bin 21 and replenish the bait in a timely manner.

[0044] In some embodiments, such as Figure 6 As shown, the conveying device 40 includes a feeding cylinder 41, a feeding assembly 42 disposed below the feeding cylinder 41, and a drive motor 43 for driving the feeding assembly to rotate. Specifically, the top of the feeding cylinder 41 has a feeding cylinder inlet 411, and the feeding assembly 42 includes a first dial 421 disposed inside the feeding cylinder 41 and a rotary sealing feeding assembly 422 disposed below the first dial 421. The drive motor 43 drives the first dial 421 and the rotary sealing feeding assembly 422 to rotate through the rotating shaft 431.

[0045] like Figure 7 As shown, the first dial 421 is evenly provided with multiple fixed-volume material troughs 4211. The bait enters the material troughs 4211 on the first dial 421 through the feed cylinder inlet 411. The drive motor 43 drives the first dial 421 to rotate so that the bait enters different material troughs 4211. Furthermore, the rotary sealing feeding assembly 422 includes a feeding cylinder 4221, with a feeding inlet 4222 on the top edge of the feeding cylinder 4221. The shape and size of the feeding inlet 4222 are consistent with the shape and size of the projection of the material receiving trough 4211 on the horizontal plane, so that the bait in each material receiving trough 4211 can enter the feeding cylinder 4221 from the feeding inlet 4222. like Figure 8 As shown, the bottom of the feeding cylinder 4221 is provided with a discharge outlet 4223, which is staggered from the discharge inlet 4222. The feed cylinder 4221 has a second dial 4224 fixed inside. The second dial 4224 is coaxially arranged with the first dial 421. The rotating shaft 431 drives the second dial 4224 and the first dial 421 to rotate. The second dial 4224 is also provided with multiple fixed-volume feeding troughs 4225. The drive motor 43 drives the first dial 421 and the second dial 4224 to rotate through the rotating shaft 431. The feeding troughs 4211 and 4225 are both fixed-volume, so the bait can be quantitatively transported to the Venturi pipe 12 through the feeding outlet 4223.

[0046] In some embodiments, the pneumatic feeding device 10 is located below the feeding assembly 42 and includes a high-pressure blower 11, a venturi pipe 12, and a feed delivery pipe 13 connected in sequence. The venturi pipe 12 is also provided with a feed interface 121 connected to the feeding outlet 4223 of the feeding cylinder 4221. The feed in the feeding cylinder 4221 is transported to the venturi pipe 12 through the feeding outlet 4223 and the feed interface 121. After the feed is mixed with the high-pressure airflow generated by the high-pressure blower 11 in the venturi pipe 12, it enters the feed delivery pipe 13. The feed delivery pipe 13 transports the high-pressure gas and feed to the deep-sea aquaculture tank 30.

[0047] Furthermore, in this embodiment, the high-pressure blower 11 is a Roots blower. The Roots blower can generate a stable high-pressure airflow, which can enable the feed to be transported to the designated feeding point over a long distance and quickly.

[0048] In actual operation, when selecting a high-pressure blower 11, the gas flow rate L of the high-pressure blower 11 is calculated using the following formula: L=

[0049] F is the daily feeding amount, in grams. The daily feeding amount F in this embodiment is calculated by the above formula (3). The feed-to-gas ratio was determined experimentally to be 12-20. The depth of water for feeding is indicated in meters.

[0050] In some embodiments, a pressure compensation pipe 111 is also connected between the high-pressure blower 11 and the bait storage chamber 21. A portion of the high-pressure gas generated by the high-pressure blower 11 enters the bait storage chamber 21 through the pressure compensation pipe 111 to compensate for the pressure difference between the bait storage chamber and the Venturi pipe. During underwater baiting, the valve 23 is closed, and the bait storage chamber 21 is sealed, as is the conveying device 40, preventing communication with the outside world. Since the Venturi pipe 12 contains high-pressure gas, the pressure compensation pipe 111 is installed to prevent bait from being drawn back into the bait storage chamber 21 from the Venturi pipe 12 via the conveying device 40. This ensures that the pressure in the bait storage chamber 21 and the Venturi pipe 12 is the same, allowing the bait to smoothly enter the Venturi pipe 12 from the bait storage chamber 21.

[0051] In some embodiments, the high-pressure blower 11 generates a large amount of heat during operation due to mechanical friction and gas compression, causing the temperature of the high-pressure gas to rise. Therefore, a cooling pipe 112 is provided between the high-pressure blower 11 and the Venturi pipe 13. The cooling pipe 112 cools the high-pressure gas flow blown out by the high-pressure blower 11 to prevent the high-pressure gas flow temperature from being too high, which would cause the feed to rot and damage the farmed fish.

[0052] In some embodiments, such as Figure 9 As shown, a buffer distributor 14 is provided at the outlet 131 of the bait conveying pipe 13. The buffer distributor 14 disperses the bait at the outlet 131, expanding the distribution range; as Figure 9 As shown, the buffer distributor 14 includes multiple outwardly dispersing arc-shaped distribution pipes. The axis of the distribution pipe gradually moves away from the axis of the bait conveying pipe 13 along its length direction, so that the bait at the outlet 131 is evenly dispersed in all directions after passing through the distribution pipe. At the same time, since the distribution pipe has a certain curvature, it also has a certain speed-reducing effect on the bait.

[0053] In some embodiments, the gas replenishment and feeding system further includes a control system, which includes a PLC controller, a monitoring module, a data transmission and storage module, and a remote interaction module.

[0054] The monitoring module is used to monitor the actual operation information during the feeding process; it uses a dissolved oxygen sensor to monitor the gas content in the deep-sea aquaculture tank 30 in real time, a pressure sensor to collect the air pressure in the feed delivery pipe 13 during the feeding process, a speed meter to monitor the feed feeding speed, a feed shortage sensor to monitor the feed shortage status information of the feed cylinder 41, a pressure sensor and an air volume sensor to monitor the high-pressure blower operation status information, and a speed sensor to monitor the operation information of the drive motor 13 and generate corresponding equipment alarm information. The data transmission and storage module communicates with Alibaba Cloud via the deep-sea WIFI network and the S202 gateway, uploading the actual operating information and alarm information of the equipment monitored by the monitoring module to the corresponding database of Alibaba Cloud for storage. The remote interaction module connects the database to terminal devices such as mobile phones or computers via the network, allowing users to remotely view the actual operating information, equipment alarm information, and feeding scheme parameters of equipment such as high-pressure blowers, drive motors, and suction fans on the terminal devices. It also supports remotely sending feeding parameter adjustment commands to the PLC controller.

[0055] In some embodiments, for ease of equipment commissioning and installation, the bait storage device 20, the conveying device 40, and the pneumatic feeding device 10 are integrated into a skid-mounted container 50, such as... Figure 10 As shown, the skid-mounted container 50 is placed on the servo ship, and the various devices work together to realize the fully automated operation from bait storage to precise delivery.

[0056] The aeration and feeding system of the present invention is used in deep-sea environments. It adopts a pneumatic feeding method, which delivers the feed into the deep-sea aquaculture tank through high-pressure gas, and provides aeration for the pufferfish at the same time as feeding; no additional aeration device is required, which reduces equipment costs.

[0057] To facilitate debugging and transportation, a skid-mounted design is adopted, integrating the bait storage device 20, the conveying device 40, and the pneumatic feeding device 10 into the skid-mounted container 50.

[0058] The deep-sea unmanned management and remote control are achieved through PLC controllers and IoT. The feeding plan is automatically adjusted according to the growth curve of farmed fish, and multiple timed feeding periods are set. The feeding start time, the conveying speed of the feed delivery pipe 13, the feeding speed of the feeding component, and the feeding amount are set. The actual operation information during the feeding process is monitored in real time, such as the air volume and pressure in the deep-sea aquaculture tank, the feeding speed detected by the speedometer in the feed delivery pipe 13, and equipment alarm information, such as the lack of feed information provided by the lack of feed sensor in the feed cylinder 41 and the operation information of the drive motor 13 monitored by the speed sensor. The data is stored in the database through Alibaba Cloud and connected to the terminal device through the network.

[0059] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method for supplementing air and feeding fish with a throat bladder, characterized in that, A pneumatic feeding device is used to replenish air and feed the swim bladder fish in the deep-sea aquaculture tank. The pneumatic feeding device includes a high-pressure blower, a Venturi pipe and a feed delivery pipe connected in sequence. The Venturi pipe is also connected to the feed storage bin. The high-pressure blower is connected to the feed storage bin through a pressure compensation pipe. The method for supplementing air and feeding includes the following steps: After the bait is fed into the bait storage bin, the bait storage bin is sealed, so that the bait storage bin and the Venturi tube form a closed channel; After the high-pressure blower is started and maintained for a set time, the bait storage bin delivers bait to the Venturi pipe at a feed-to-air ratio of (12-20):

1. The high-pressure gas generated by the high-pressure blower mixes with the bait in the Venturi pipe. At the same time, some of the high-pressure gas enters the bait storage bin through the pressure compensation pipe to balance the pressure difference between the bait storage bin and the Venturi pipe, so that the bait can enter the Venturi pipe from the bait storage bin. The mixed high-pressure gas and the feed are transported to the deep-sea aquaculture tank through the feed delivery pipe. The high-pressure gas enters the water and forms microbubbles as a gas source to replenish the gas supply to the swim bladder fish. The feed is then fed to the swim bladder fish.

2. The method for supplementing air and feeding fish with a throat bladder according to claim 1, characterized in that, Inside the deep-sea aquaculture tank, a feed buffer zone is formed with the feed outlet as the origin and a certain distance from the feed outlet as the radius. After the feed is discharged from the feed outlet of the feed delivery pipe, the water in the feed buffer zone buffers and slows down the feed. The swim bladder fish feed on the slowed-down feed outside the feed buffer zone.

3. The method for supplementing air and feeding fish with a throat bladder according to claim 2, characterized in that, The radius of the bait buffer zone Calculated according to formula (1): （1） Where 'a' is a fixed coefficient. v is the speed of the bait when it leaves the bait delivery pipe, and v is the speed of the bait after passing through the bait buffer zone and slowing down.

4. The method for supplementing air and feeding fish with a throat bladder according to claim 1, characterized in that, The air supply capacity Q of the high-pressure blower is calculated according to formula (2): （2） Where b is an empirical coefficient, ρ_air is the air density, V is the water volume of the deep-sea aquaculture tank, η is the efficiency of the high-pressure blower, h is the depth of the discharge port in the deep-sea aquaculture tank, and (0.1h+1) is the depth correction factor.

5. The method for supplementing air and feeding fish with a throat bladder according to claim 1, characterized in that, The daily feed input F of the feed conveying device is: Among them, W t t represents the body weight of the fish at time t, reflecting the growth status of the fish during the breeding cycle; k is the daily feed rate, representing the proportion of feed amount to the fish's body weight.

6. A system for supplementing air and feeding fish suitable for those with a throat bladder, using the method for supplementing air and feeding as described in claims 1-5, characterized in that, include: A bait storage device includes a bait storage bin and a feeding assembly connected to the bait storage bin for conveying bait into the bait storage bin; A conveying device includes a feeding cylinder and a feeding assembly disposed inside the feeding cylinder, the feeding cylinder being connected to the bait storage bin; A pneumatic feeding device, located below the feeding assembly, includes a high-pressure blower, a venturi pipe, and a bait delivery pipe connected in sequence. The venturi pipe is also provided with a bait interface connected to the feeding cylinder. The feeding assembly delivers the bait in the feeding cylinder to the venturi pipe through the bait interface. The bait mixes with the high-pressure airflow generated by the high-pressure blower in the venturi pipe and then enters the bait delivery pipe. The high-pressure blower is also connected to the bait storage bin by a pressure compensation pipe. Some of the high-pressure gas generated by the high-pressure blower enters the bait storage bin through the pressure compensation pipe to compensate for the pressure difference between the bait storage bin and the Venturi pipe.

7. The aeration and feeding system for fish with swim bladders according to claim 6, characterized in that, A cooling pipe is provided between the high-pressure blower and the Venturi pipe, and the cooling pipe cools the high-pressure airflow blown out by the high-pressure blower. The pressure compensation pipe connects the cooling pipe to the storage chamber.

8. The aeration and feeding system for fish with swim bladders according to claim 6, characterized in that, The feeding assembly includes a feeding cylinder, a suction pipe, a feeding tube, and a blower. A valve is provided between the feeding cylinder and the bait storage bin. One end of the suction pipe is located inside the feeding cylinder and the other end is connected to the blower. One end of the feeding tube is located inside the feeding cylinder and the other end is connected to the external bait bin. The exhaust fan draws air from the feeding cylinder through the suction pipe, creating a negative pressure inside the feeding cylinder. The bait in the bait storage bin then enters the feeding cylinder through the feeding pipe.

9. The aeration and feeding system for fish with swim bladders according to claim 6, characterized in that, The bait storage device, the conveying device, and the pneumatic feeding device are integrated into a skid-mounted container.

10. The aeration and feeding system for fish with swim bladders according to claim 6, characterized in that, The gas replenishment and feeding system also includes a control system, which includes: PLC controller; The monitoring module is used to monitor the gas content in the deep-sea aquaculture tank, collect the air pressure and feed feeding speed in the feed delivery pipe during the feeding process, obtain information on feed shortage status and high-pressure blower operation status, and generate corresponding equipment alarm information. The data transmission and storage module is connected to Alibaba Cloud via the Internet of Things to upload the actual operating information and alarm information of the device to the corresponding database of Alibaba Cloud for storage. The remote interaction module connects the database to the mobile terminal via a network, allowing users to remotely view the operating information, alarm information, and feeding scheme parameters obtained by the monitoring module, and supports remotely sending feeding parameter adjustment commands to the PLC controller.

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