Multifunctional fishery culture device

Abstract

The application discloses a multifunctional fishery breeding device, which comprises a ship body, a bait throwing mechanism arranged on the ship body, four ship bodies arranged in parallel and connected in series, impellers arranged on the inner and outer sides of the two side ship bodies, a transmission shaft connecting the impellers, an axle driving motor connected with the transmission shaft, two bait throwing mechanisms symmetrically arranged between the two adjacent ship bodies, a disinfection and throwing mechanism and an aeration mechanism arranged between the two middle ship bodies, the disinfection and throwing mechanism and the aeration mechanism arranged in front and back, the aeration mechanism being a lifting type aeration mechanism, and a liquid outlet long pipe of the disinfection and throwing mechanism arranged at the bottom of the ship body and behind the microporous aerator of the aeration mechanism. The breeding device integrates the functions of bait throwing, disinfection and oxygen increasing, and the mechanisms are arranged in different zones, the bait is thrown on the water surface, the disinfection is carried out underwater, and the bottom layer lifting aeration is carried out, so that the operations do not interfere with each other, the device runs stably, the bait throwing, disinfection and aeration oxygen increasing operations have a wide area coverage, the efficiency is high, and good economic benefits can be brought.

Description

Technical Field

[0001] This invention relates to the technical field of feeding equipment for shrimp and crab farming, and more specifically to a multifunctional aquaculture device. Background Technology

[0002] Aquaculture is an important part of modern agriculture. With the popularization of large-scale and intensive aquaculture models, automated aquaculture equipment has become the core equipment for improving aquaculture efficiency and ensuring water quality and the survival rate of aquatic products. At present, the aquaculture operation equipment on the market has relatively simple functions, mostly only having independent feeding and aeration functions. It lacks integrated operation carriers, has low equipment integration, and is cumbersome to operate, making it difficult to adapt to the comprehensive operation needs of large-scale pond and water aquaculture.

[0003] Existing aquaculture feeding equipment is mostly a single-unit feeding structure, which has a limited throwing range and uneven feed distribution, easily leading to local feed accumulation and waste. At the same time, conventional feeding equipment lacks anti-clogging structure, and the feed becomes damp and clumps, which can easily block the discharge port, affecting continuous feeding operations. The accumulated residual feed can also rot and deteriorate, polluting the aquaculture water and inducing aquatic diseases.

[0004] Meanwhile, traditional aeration equipment for aquaculture is mostly fixed installation structure, and the aeration height and position cannot be flexibly adjusted. There is a large difference in dissolved oxygen between the surface and bottom of the water. The bottom water is often deficient in dissolved oxygen, which can easily breed anaerobic bacteria and cause the bottom sediment to deteriorate. In addition, the coverage of fixed aeration mechanisms is limited, which cannot achieve uniform oxygenation throughout the entire area. The oxygenation efficiency is low and the energy consumption is high, making it difficult to adapt to different water depths and different aquaculture densities.

[0005] In addition, water disinfection is a crucial aspect of aquaculture. Currently, water disinfection still relies on manual methods. Disinfectant solutions are pre-mixed, placed in buckets, and then manually applied by personnel entering the pond. This manual underwater work poses certain risks, and the disinfectant solutions are irritating and harmful to health. Some large-scale ponds use simple water disinfection equipment, often with single-point application of the disinfectant. This results in uneven mixing and distribution of the disinfectant, leading to poor disinfection and sterilization effects. Furthermore, the disinfectant solution tends to separate and settle upon standing, significantly reducing its effectiveness.

[0006] In addition, traditional aquaculture vessels are mostly single-hull structures, which have poor stability and a single mode of operation. They cannot simultaneously carry out multiple coordinated operations such as stable navigation, feeding across the entire area, uniform disinfection, and three-dimensional aeration. The functionality, adaptability, and operational stability of the equipment are all significantly deficient.

[0007] In summary, existing aquaculture equipment suffers from numerous technical drawbacks, including limited functionality, low integration, uneven feeding, fixed aeration range, poor disinfection efficacy, insufficient vessel stability, and poor operational versatility. These shortcomings severely restrict the automation and efficiency of aquaculture. Therefore, there is an urgent need to develop a multifunctional aquaculture device that integrates feeding, disinfection, aeration, and stable navigation. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a multifunctional aquaculture device with good stability and high integration, which integrates feeding, aeration, and disinfection, resulting in high uniformity of feeding, aeration, and disinfection, and high operational efficiency.

[0009] According to one aspect of the present invention, a multifunctional aquaculture device is provided, comprising a hull and a feeding mechanism mounted on the hull. The hull consists of four hulls connected in parallel. Impellers are provided on the inner and outer sides of both hulls. Each impeller is connected in series via a drive shaft, which is connected to a shaft drive motor. There are two feeding mechanisms, which are symmetrically arranged on the left and right and mounted between two adjacent hulls. A disinfection and aeration mechanism is provided between the two middle hulls. The disinfection and aeration mechanism are distributed front to back, and the aeration mechanism is a lifting aeration mechanism. Therefore, this device has a high degree of integration, requiring no separate equipment, reducing investment and management in aquaculture equipment. The feeding, disinfection, and aeration zones are arranged separately to prevent mutual interference, and the aeration depth can be adjusted according to the water level and the growth stage of the aquatic organisms. Compared with traditional single-hull aquaculture vessels, the overall structure of four hulls connected in parallel has a larger hull support area and a more stable center. The impellers are also rationally distributed and driven in series through a single drive shaft, resulting in uniform and stable propulsion. This allows for straight-line navigation without deviation or jamming, ensuring smooth operation during feeding, disinfection, and aeration. The double-symmetrical feeding mechanism provides uniform feeding and a wide coverage area, resulting in high feeding efficiency, making it suitable for large-area aquaculture waters.

[0010] In some embodiments, a crossbeam is provided between the two hulls in the middle, and an integrated rudder propeller with a fairing is connected below the crossbeam. This allows for independent assisted steering, and the addition of the fairing concentrates water flow to improve propulsion efficiency, reduces water splashing, and minimizes disturbance to aquatic life.

[0011] In some embodiments, the feeding mechanism includes a bait hopper, a feeding disc, and a feeding motor. The bottom of the bait hopper has a discharge port, and the feeding disc is located directly below the discharge port. The feeding motor drives the feeding disc to rotate and scatter bait. The feeding disc includes a top plate, a bottom plate, and multiple evenly distributed blades located between the top and bottom plates. The top plate has a receiving port at its center, and each blade has a distributor at its center. The distributor is conical, and its center is aligned with the center of the receiving port. Thus, the bait falls from the discharge port to the receiving port by its own weight. The conical distributor evenly distributes the falling bait between the blades, preventing concentrated scattering. The feeding motor drives the feeding disc to rotate and evenly scatter the bait.

[0012] In some implementations, a vibrator is provided on the outer wall of the bait hopper. This vibrator continuously vibrates the bait hopper, breaking up bait clumps and preventing bait from sticking to the bait wall, ensuring continuous feeding from the outlet and avoiding interruptions in feeding.

[0013] In some implementations, the disinfection dispensing mechanism includes a storage tank and a drain pipe. The bottom of the storage tank is connected to the drain pipe, and a drain valve is installed at the connection point. The drain pipe is connected to a long outlet pipe, which is horizontally positioned at the bottom of the hull. The outlet pipe has multiple evenly distributed outlet heads. A stirring shaft with stirring blades is installed inside the storage tank, and a stirring motor is connected to the top of the stirring shaft. Thus, the storage tank centrally dispenses the disinfectant, and the outlet pipe extends to the bottom of the hull, releasing the disinfectant from the deep bottom layer, directly acting on the lower layers of the aquaculture water. Compared to surface spraying, the disinfectant sinks and diffuses more thoroughly, resulting in better disinfection of bottom-layer pathogens and uneaten feed. Furthermore, the multi-point simultaneous release of the disinfectant allows for a large lateral diffusion range, ensuring uniform disinfection across the entire water area as the vessel moves, eliminating any blind spots. The stirring blades inside the storage tank agitate the disinfectant, quickly dissolving and mixing it, preventing sedimentation and stratification, ensuring a balanced concentration of the output disinfectant, and maintaining stable disinfection effects. Crucially, this reduces reliance on manual labor and minimizes harm to human health.

[0014] In some embodiments, the aeration mechanism includes a Roots blower, a lifting frame, and air branch pipes. The Roots blower is connected to an inlet pipe and an outlet pipe, with the outlet pipe being a long flexible tube. The lifting frame is located below the hull, and a lifting screw assembly is located at the center of the lifting frame. The lifting screw assembly is connected to a lifting motor to drive the lifting frame to rise or fall below the hull. The lifting frame has a vertically upward guide rod, and a guide sleeve is provided outside the guide rod. The guide sleeve is fixed to the hull by a bracket. The air branch pipes are fixed to the lifting frame. Thus, the outlet pipe is a flexible tube, and the lifting and lowering movements will not cause pulling. During the aquaculture process, the aeration depth can be adjusted according to the growth stage of the aquatic organisms or the water level to achieve the desired aeration and oxygenation effect. If the water level is shallow, the lifting frame can be raised to prevent the aerators from contacting silt and clogging.

[0015] In some embodiments, the air branch pipe includes interconnected left, horizontal, and right branch pipes, forming a U-shaped structure. Each of the left, horizontal, and right branch pipes is equipped with multiple evenly distributed microporous aerators. The left and right branch pipes are located below the sides of the hull. Thus, the U-shaped air branch pipe spans the entire area beneath the hull, providing simultaneous aeration from the left, right, and center, oxygenating the entire operating area. The microporous aeration produces fine bubbles with a large gas-liquid contact area, resulting in a dissolved oxygen efficiency far exceeding that of traditional aeration pipes. This rapidly increases dissolved oxygen in the water, improving bottom oxygen deficiency and excessive nitrite levels. The gentle bubbles do not violently agitate the bottom sediment, preventing water turbidity and stress on aquatic products.

[0016] In some implementations, the discharge pipe is located behind the lifting frame, with the discharge head facing the stern or downwards. This location at the stern avoids damage to the aeration mechanism from the disinfectant, and as the vessel moves, the water flow carries the disinfectant backwards, extending the mixing path and resulting in more thorough water mixing.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (i) This aquaculture device integrates feeding, disinfection and oxygenation functions into one unit, and a single person can complete all aquaculture operation and maintenance. The equipment is intensive, reducing the cost of purchasing aquaculture boats and labor. (ii) Each unit is arranged in a zoned and layered manner, with surface feeding, underwater disinfection, and bottom-level aeration. The operations do not interfere with each other. The feeding, disinfection, and aeration oxygenation work in separate zones, without polluting each other, and the water quality control is more stable. (iii) Multiple hulls are connected in parallel for propulsion, combined with integrated rudder propellers for steering. The device moves smoothly as a whole. It can cover a wide area for feeding, disinfection, and aeration, and is highly efficient, which can bring good economic benefits. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one embodiment of a multifunctional aquaculture device; Figure 2 This is a schematic diagram of the feeding mechanism; Figure 3 This is a structural diagram of the disinfection dispensing facility; Figure 4 This is a schematic diagram of the aeration mechanism.

[0019] Labeling Descriptions: Hull - 1; Impeller - 11; Drive Shaft - 12; Shaft Drive Motor - 13; Integrated Rudder Propeller - 14; Flow Deflector - 141; Crossbeam - 142; Feeding Mechanism - 2; Feed Hopper - 21; Discharge Port - 211; Baffle - 212; Screw and Nut Assembly - 213; Baffle Motor - 214; Support Plate - 215; Feeding Pan - 22; Top Plate - 221; Feed Inlet - 2211; Bottom Plate - 222; Blades - 223; Distributor - 224; Feeding Motor - 23; Vibrator - 24; Disinfection and Dispensing Mechanism - 3; Liquid Storage Tank - 3 1; Liquid inlet - 311; Drain pipe - 32; Outlet pipe - 33; Outlet head - 331; Drain valve - 34; Stirring shaft - 35; Stirring blades - 351; Stirring motor - 36; Aeration mechanism - 4; Roots blower - 41; Inlet pipe - 42; Outlet pipe - 43; Lifting frame - 44; Air branch pipe - 45; Left branch pipe - 451; Horizontal branch pipe - 452; Right branch pipe - 453; Microporous aerator - 46; Lifting screw assembly - 47; Lifting motor - 471; Guide rod - 48; Guide sleeve - 481; Support - 49; Frame - 5. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments.

[0021] like Figure 1 As shown, a multi-functional aquaculture device according to one embodiment of the present invention includes a hull 1, a feeding mechanism 2 mounted on the hull 1, a disinfection and feeding mechanism 3, and a lifting aeration mechanism 4.

[0022] The vessel consists of four hulls connected side-by-side, each equipped with one impeller 11. These impellers 11 are located on the inner and outer sides of the left and right hulls, respectively, and are connected in series via a drive shaft 12. The drive shaft 12 is connected to a shaft drive motor 13, which is fixed to the hull 1. The shaft drive motor 13 and drive shaft 12 can be driven by gears, sprockets and chains, or belt pulleys. Both the hulls 1 and impellers 11 are made of plastic. There are two feeding mechanisms 2, symmetrically arranged about the center of the four hulls 1, positioned between adjacent hulls 1. A disinfection and aeration mechanism 3 and aeration mechanism 4 are located between the two middle hulls 1, arranged front to back.

[0023] A crossbeam 142 is fixed between the two hulls 1 in the middle. An integrated rudder propeller 14 is installed below the crossbeam 142. The integrated rudder propeller 14 has a fairing 141.

[0024] Compared to traditional single-hull aquaculture vessels, the overall structure of four hulls 1 connected in parallel has a larger support area and a more stable center. The impellers 11 are also reasonably distributed and driven in a unified manner through a single drive shaft 12, which makes the propulsion power uniform and stable. It can achieve straight-line navigation without deviation or jamming, and ensures smooth operation during feeding, disinfection and aeration operations.

[0025] When turning is required, the integrated rudder propeller 14 provides independent steering assistance. Furthermore, the fairing 141 can concentrate water flow to improve propulsion efficiency, reduce water splashing, and minimize disturbance to aquatic products.

[0026] like Figure 1 and 2 As shown, the feeding mechanism 2 specifically includes a bait hopper 21, a feeding tray 22, and a feeding motor 23. The bait hopper 21 is mounted on a frame 5 above the gap between two adjacent hulls 1. The bait hopper 21 is funnel-shaped with its size gradually decreasing from top to bottom. A vibrator 24 is installed on the outer wall of the bait hopper 21. The bottom of the bait hopper 21 has a discharge port 211, and a baffle 212 is provided at the discharge port 211. The bottom of the baffle 212 is connected to a baffle motor 214 through a screw and nut assembly 213 to drive the baffle 212 to open and close the discharge port 211. The baffle motor 214 is fixed to the frame 5 by a plate 215. The feeding tray 22 is located directly below the discharge port 211. The feeding motor 23 drives the feeding tray 22 to rotate and scatter bait. The feeding tray 22 includes a top plate 221, a bottom plate 222, and multiple evenly distributed blades 223 located between the top plate 221 and the bottom plate 222. A receiving port 2211 is provided at the center of the top plate 221. The receiving port 2211 is located directly below the discharge port 211, and the receiving port 2211 is larger than the discharge port 211. Each blade 223 is circumferentially distributed around the receiving port 2211. A conical distributor 224 is welded at the center, and the center of the distributor 224 is aligned with the center of the receiving port 2211.

[0027] The feed to be fed is placed in the feed hopper 21. During feeding, the baffle motor 214 moves the baffle 212 away through the screw nut assembly 213, and the feed falls from the discharge port 211 to the receiving port 2211 by its own weight. The conical distributor 224 divides the falling feed, distributing it evenly between the blades 223. The blades 223 form a feeding channel. As the feeding motor 23 drives the feeding disc 22 to rotate, the feed is evenly scattered. The added vibrator 24 continuously vibrates the feed hopper 21, breaking up feed clumps during the feeding process, preventing feed from sticking to the feed wall, ensuring continuous feeding from the discharge port 211, and avoiding feeding interruptions. This aquaculture device adopts a double symmetrical feeding mechanism 2, which provides even feeding, a wide feed coverage area, and high feeding efficiency, making it suitable for large-area aquaculture waters.

[0028] like Figure 1and 3 As shown, the disinfection dispensing mechanism 3 specifically includes a storage tank 31, a drain pipe 32, and an outlet pipe 33. The storage tank 31 is mounted on a frame 5 above the gap between the two hulls 1 and has a liquid inlet 311. The bottom of the storage tank 31 is connected to the drain pipe 32, and a drain valve 34 is installed at the connection. The drain pipe 32 is connected to the outlet pipe 33, which is horizontally fixed to the bottom of the hull 1. The outlet pipe 33 is equipped with multiple evenly distributed outlet heads 331. To maintain the balance of the hull 1, the storage tank 31 is located at the front of the hull 1. However, to avoid the disinfectant damaging aquaculture equipment such as the aeration mechanism 4, the outlet pipe 33 is located at the stern of the hull. Therefore, the drain pipe 32 is needed to guide the disinfectant solution to the outlet pipe 33 at the bottom of the stern.

[0029] A stirring shaft 35 is installed inside the liquid storage tank 31. Stirring blades 351 are installed on the stirring shaft 35 inside the liquid storage tank 31. A stirring motor 36 is connected to the top of the stirring shaft 35. The stirring motor 36 is located outside the liquid storage tank 31.

[0030] The disinfectant is centrally dispensed in the storage tank 31. Opening the drain valve 34 allows the disinfectant solution in the storage tank 31 to be transported through the drain pipe 32 to the outlet pipe 33, which extends to the bottom of the boat. The disinfectant solution is released underwater at the outlet head 331 on the bottom of the boat, directly acting on the lower layers of the aquaculture water. Compared to surface spraying, the solution sinks and diffuses more thoroughly, resulting in better disinfection of bottom-layer pathogens and uneaten feed. Furthermore, the simultaneous release of the solution at multiple points ensures a wide lateral diffusion range, allowing for even disinfection of the entire water area as the boat moves, eliminating any blind spots. The stirring blades 351 inside the storage tank 31 agitate the disinfectant, rapidly dissolving and mixing it to prevent sedimentation and stratification. This ensures a balanced concentration of the output disinfectant solution and stable disinfection effects. Crucially, it reduces reliance on manual labor and minimizes harm to personnel.

[0031] like Figure 1 and 4As shown, the aeration mechanism 4 specifically includes a Roots blower 41, a lifting frame 44, an air branch pipe 45, and a microporous aerator 46. The Roots blower 41 is connected to an air inlet pipe 42 and an air outlet pipe 43, with the air outlet pipe 43 being a long flexible tube. A safety valve, a pressure gauge, and a check valve are installed on the air outlet pipe 43. The Roots blower 41 can be a submersible Roots blower installed on the bottom of the boat, or it can be a Roots blower installed on the hull 1, but it is best to install a baffle to prevent bait from scattering onto its surface. The lifting frame 44 is located below the hull 1, and a lifting screw assembly 47 is installed at the center of the lifting frame 44. The lifting screw assembly 47 is connected to a lifting motor 471, which drives the lifting frame 44 to rise or fall below the hull 1. The lifting motor 471 is installed on the hull 1, and the lifting motor and the lifting screw assembly 47 can be driven by a gear chain, a belt pulley, or a combination of helical gear meshing and belt pulley or gear chain transmission. The lifting frame 44 is fixed with a vertically upward guide rod 48, and a guide sleeve 481 is fitted around the guide rod 48. The guide sleeve 481 is fixed to the hull 1 by a bracket 49. The air branch pipe 45 is fixed to the bottom of the lifting frame 44. The air branch pipe 45 includes a left branch pipe 451, a horizontal branch pipe 452 and a right branch pipe 453 that are interconnected. The air branch pipe 45 has an overall U-shaped structure. The horizontal branch pipe 452 covers the bottom of the four hulls 1. The left branch pipe 451 and the right branch pipe 453 are located at both ends of the horizontal branch pipe 452. The left branch pipe 451 and the right branch pipe 453 are located below the two sides of the hull 1 respectively. The left branch pipe 451, the horizontal branch pipe 452 and the right branch pipe 453 are all equipped with multiple evenly distributed microporous aerators 46.

[0032] The air outlet pipe 43 is a flexible hose, so its raising and lowering motion will not cause pulling. During the aquaculture process, the aeration depth can be adjusted according to the growth stage of the aquatic products or the water level to achieve the desired aeration and oxygenation effect. If the water level is shallow, the lifting frame 44 can be raised to prevent the aerator from contacting silt and clogging. The U-shaped air branch pipe 45 spans the entire lower part of the hull 1, providing simultaneous aeration on the left, right, and center, covering the entire operating area of ​​the hull 1 with oxygenation. Microporous aeration produces fine bubbles with a large gas-liquid contact area, resulting in a dissolved oxygen efficiency far exceeding that of traditional aeration pipes. This rapidly increases dissolved oxygen in the water, improving problems such as bottom hypoxia and excessive nitrite levels. The bubbles are gentle and will not violently stir up the bottom sediment, causing water turbidity and stress to the aquatic products.

[0033] To protect the aeration mechanism 4, the discharge pipe 33 is located behind the lifting frame 44, closer to the stern, with the discharge head 331 facing the stern or downwards. This location at the stern prevents the disinfectant from damaging the aeration mechanism 4. Furthermore, as the vessel moves, the water flow from the hull 1 carries the disinfectant backwards, extending the mixing path and ensuring more thorough water mixing.

[0034] The multi-functional aquaculture device proposed in this application has a high degree of integration, combining feeding, disinfection, and aeration functions into one unit. A single person can complete all aquaculture operation and maintenance, eliminating the need for separate equipment for each individual function. Therefore, the application of this multi-functional aquaculture device can reduce investment in aquaculture equipment and management, and also greatly reduce labor costs.

[0035] This multi-functional aquaculture device employs a multi-hull parallel tandem propulsion system, combined with an integrated rudder propeller for stable movement during various operations. The integrated feeding, disinfection, and aeration mechanisms are arranged in zones and layers, with surface feeding, underwater disinfection, and bottom-level aeration operating independently. Feeding, disinfection, and aeration work separately in the water, preventing pollution and ensuring more stable water quality control. The aeration depth can be adjusted according to water level and aquatic growth stages. The feeding, disinfection, and aeration operations cover a wide area, are highly efficient, and can generate significant economic benefits, making it suitable for large-scale aquaculture.

[0036] The above descriptions are merely some embodiments of the present invention. It should be noted that those skilled in the art can make other modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A multifunctional aquaculture device, comprising a hull and a feeding mechanism mounted on the hull, characterized in that, The vessel consists of four hulls connected side by side. Impellers are provided on the inner and outer sides of the two hulls. Each impeller is connected in series via a drive shaft, which is connected to a shaft drive motor. There are two feeding mechanisms, which are symmetrically arranged on the left and right and mounted between two adjacent hulls. A disinfection and aeration mechanism is provided between the two middle hulls. The disinfection and aeration mechanism is distributed front to back, and the aeration mechanism is a lifting aeration mechanism.

2. The multi-functional aquaculture device according to claim 1, characterized in that, A crossbeam is provided between the two hulls in the middle, and an integrated rudder propeller is provided below the crossbeam. The integrated rudder propeller has a fairing.

3. The multi-functional aquaculture device according to claim 1, characterized in that, The feeding mechanism includes a bait hopper, a feeding disc, and a feeding motor. The bottom of the bait hopper has a discharge port, and the feeding disc is located directly below the discharge port. The feeding motor drives the feeding disc to rotate and scatter bait. The feeding disc includes a top plate, a bottom plate, and multiple evenly distributed blades located between the top plate and the bottom plate. The top plate has a receiving port at its center, and each blade has a distributor at its center. The distributor is conical, and the center of the distributor is aligned with the center of the receiving port.

4. The multi-functional aquaculture device according to claim 2, characterized in that, The outer wall of the bait hopper is equipped with a vibrator.

5. The multifunctional aquaculture device according to claim 1, characterized in that, The disinfection dispensing mechanism includes a storage tank and a drain pipe. The bottom of the storage tank is connected to the drain pipe, and a drain valve is provided at the connection point. The drain pipe is connected to a long outlet pipe, which is horizontally positioned at the bottom of the hull. The long outlet pipe has multiple evenly distributed outlet heads. A stirring shaft is provided inside the storage tank, and the stirring shaft has stirring blades. A stirring motor is connected to the top of the stirring shaft.

6. The multifunctional aquaculture device according to claim 5, characterized in that, The aeration mechanism includes a Roots blower, a lifting frame, and air branch pipes. The Roots blower is connected to an air inlet pipe and an air outlet pipe. The air outlet pipe is a long flexible tube. The lifting frame is located below the hull. A lifting screw assembly is located at the center of the lifting frame. The lifting screw assembly is connected to a lifting motor to drive the lifting frame to rise or fall below the hull. The lifting frame is provided with a vertically upward guide rod. A guide sleeve is provided outside the guide rod. The guide sleeve is fixed to the hull by a bracket. The air branch pipes are fixed to the lifting frame.

7. The multifunctional aquaculture device according to claim 6, characterized in that, The air branch pipe includes a left branch pipe, a horizontal branch pipe and a right branch pipe that are interconnected. The air branch pipe has a U-shaped structure. The left branch pipe, the horizontal branch pipe and the right branch pipe are each equipped with a plurality of microporous aerators that are evenly distributed. The left branch pipe and the right branch pipe are located below the hull on both sides.

8. The multifunctional aquaculture device according to claim 7, characterized in that, The liquid outlet tube is located behind the lifting frame, and the liquid outlet head faces the stern or downwards.

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