A feed dispensing device and method for aquaculture

Abstract

This invention relates to the field of aquaculture technology, specifically to a feed dispensing device and method for aquaculture. The device includes a feed dispensing component, a feed delivery component, and a feed storage component installed on a float. The feed storage component stores feed, and its bottom is connected to the top of the feed dispensing component. A feed delivery component is installed at the bottom of the feed dispensing component. The feed storage component includes a hopper, and a water pump is installed at the top of the hopper. The water inlet of the water pump extends through a pipe to the bottom of the feed dispensing component and then connects to the outside. The water outlet of the water pump is connected through a pipe to the inner cavity of the feed dispensing component. The water pump generates circulating water, placing the feeding device in the shrimp's living area in the water. This reduces the chance of other fish stealing the feed or the shrimp sinking to the bottom, while increasing the oxygen content of the water and reducing the cost of oxygenation equipment. During the feeding process, bubbles are generated, lifting fly larvae and creating a swimming effect that attracts shrimp to quickly prey on them.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, specifically to a feed dispensing device and method for aquaculture. Background Technology

[0002] Co-culture of pomfret and shrimp is a three-dimensional aquaculture model based on the principle of ecological niche complementarity. It maximizes aquaculture efficiency by fully utilizing the space and food resources at different water layers. Pomfret primarily inhabit the upper water layer, exhibiting group activity and frequent diurnal activity, while shrimp mainly inhabit the lower water layer, exhibiting nocturnal habits, mostly hiding at the bottom during the day and foraging at night. This co-culture model fully utilizes different water layers, increasing the aquaculture efficiency per unit water area. The complementary feeding habits of the two organisms improve feed utilization, forming a virtuous cycle. Simultaneously, the activity of pomfret increases dissolved oxygen in the water, while the benthic activity of shrimp disturbs the bottom sediment, improving the bottom environment. The complementary ecological habits of the two organisms reduce the risk of disease and maintain the stability of the aquaculture environment.

[0003] Fly larvae serve multiple important functions as high-quality feed for shrimp farming. They are rich in high-quality protein, essential amino acids, and unsaturated fatty acids, which closely match the nutritional needs of shrimp, promoting their growth, development, and nutrient metabolism. Furthermore, their excellent dynamic characteristics allow them to float naturally in water; their freshness and distinctive odor effectively stimulate shrimp feeding behavior, triggering their foraging instincts and increasing feed intake. The soft body walls of fly larvae facilitate digestion and absorption by shrimp, reducing fecal emissions, improving feed conversion efficiency, and lowering the risk of water pollution. In addition, the various bioactive substances in fly larvae can enhance shrimp immunity, strengthen disease resistance, and reduce disease incidence. The rational use of fly larvae as shrimp feed not only improves farming efficiency but also yields significant ecological and economic benefits.

[0004] Chinese patent document (authorization announcement number: CN110754411B) discloses an automatic feeding machine for aquaculture, including a frame, a paddling mechanism, a directional control mechanism, a feeding mechanism, a buoyancy adjustment mechanism, a battery, and a controller. The paddling mechanism is symmetrically fixed on the frame about its length axis, and its working end is in contact with the water during operation. The directional control mechanism is fixed on the central axis of the frame, and its working end extends into the water during operation. The feeding mechanism is fixed on the frame and its bottom extends through the frame. The buoyancy adjustment mechanism is fixed around the frame, and the battery is fixed on the frame. This technical solution solves the problem of uneven feeding in existing technologies, the directional adjustment is convenient and controllable, it has low environmental requirements, and a wide range of applications. It is suitable for both uniform and concentrated feeding, avoiding waste of fish food.

[0005] In mixed farming environments of pomfret and shrimp, when feeding shrimp with fly larvae, simply scattering the larvae directly on the water surface will cause them to be eaten by other fish or spread widely in the water, making it difficult for shrimp to eat in time. This results in a large amount of feed settling and rotting at the bottom of the pond, polluting the water quality. Additionally, the farming environment requires additional feeding equipment, increasing costs.

[0006] In order to save costs, fly larvae are purchased in bulk and then fed to the shrimp. Since the fly larvae are transported frozen, they no longer have the characteristics of live movement and are not attractive enough to attract the attention of the shrimp. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a feed dispensing device and method for aquaculture. The device is placed in the shrimp's living area by circulating water generated by a water pump. This reduces the risk of shrimp being eaten by other fish or sinking to the bottom, while increasing the oxygen content of the water and reducing the cost of oxygen supply equipment. During the feeding process, bubbles are generated that lift fly larvae to float, creating a swimming effect that attracts shrimp to quickly prey on them.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A feed dispensing device for aquaculture includes a dispensing component, a feeding component, and a storage component mounted on a float. The storage component stores feed, and its bottom is connected to the top of the dispensing component. A feeding component is installed at the bottom of the dispensing component. The storage component includes a hopper, and a water pump is installed at the top of the hopper. The inlet of the water pump extends through a pipe to the bottom of the dispensing component and then connects to the outside. The outlet of the water pump is connected through a pipe to the inner cavity of the dispensing component. The dispensing component includes a cylinder with a sealed bottom. A lifting rod is installed inside the cylinder, and an opening and closing unit is provided at the upper part of the lifting rod. The opening and closing unit controls the hopper to release feed at intervals. A pushing unit is provided at the bottom of the lifting rod, and the pushing unit has an outlet. The feed inside the cylinder is transferred to the feeding assembly. During the transfer, the pushing unit expels the air inside the cylinder and prevents water backflow. The feeding assembly includes a rotating cylinder and a lifting unit. The rotating cylinder is rotatably mounted at the bottom of the cylinder. An outer cavity is provided on the inner wall of the rotating cylinder, which is connected to the outlet of the pushing unit. Several oblique holes are opened on the outer cavity, which connect the outer cavity to the outside. The openings of the oblique holes are arranged along the tangent of the rotating cylinder. The lifting unit includes a U-shaped frame, which is fixedly connected to a lifting rod. The rotating cylinder rotates under the reverse thrust of the water flow generated by the water pump, driving the U-shaped frame and the lifting rod to move up and down together, so that the pushing unit sends the feed and air inside the hopper to the outside of the rotating cylinder, making the feed float.

[0010] Preferably, a partition is provided at the upper part of the cylinder to divide the interior into two downward channels. A limiting groove is formed inside the partition along the axial direction of the cylinder. A central cylinder is provided in the middle of the partition along the axial direction, and the central cylinder communicates with the interior of the limiting groove. An inner cylinder is fixed in the bottom cavity of the cylinder. The inner cylinder has a piston cylinder. An inclined surface is provided at the top of the inner cylinder. An outlet and an inlet are respectively provided on the side wall of the mixing chamber below the inner cylinder. The inlet is connected to the outlet end of the water pump.

[0011] Preferably, the lifting unit further includes a cam groove, which is formed on the outer periphery of the rotating drum. The cam groove is a continuously closed curved groove. Both ends of the U-shaped frame are provided with guide rods. The ends of the two guide rods away from the U-shaped rod are slidably installed inside the cam groove. The crossbar of the U-shaped frame is slidably inserted into the limiting through groove.

[0012] Preferably, the pushing unit includes a lower piston, a middle piston, and an upper piston installed in the piston cylinder. The lower piston is fixedly installed at the bottom end of the lifting rod, the middle piston is slidably installed on the lifting rod, and the upper piston is fixedly installed on the lifting rod, with the upper piston located above the middle piston. A tension spring is installed between the bottom end of the upper piston and the top end of the middle piston, and a snap-fit ​​component is provided between the middle piston and the inner cylinder.

[0013] Preferably, the latching component includes a sliding groove, a return spring, a locking rod, a U-shaped groove, a shoulder, a push rod, a first connecting rod, a balance bar, a roller, a second connecting rod, and a pin. The sliding groove is formed on the side wall of the middle piston, and the U-shaped groove is formed on the inner wall of the inner cylinder. The two ends of the U-shaped groove are spaced apart along the axial direction of the cylinder. The upper opening of the U-shaped groove is opposite to the sliding groove, and a shoulder is formed inside the lower opening of the U-shaped groove. A push rod is slidably disposed in the upper opening of the U-shaped groove, and a roller is disposed in the lower opening of the U-shaped groove. A balance bar is installed in the vertical section of the U-shaped groove via a pin. The top of the balance bar is hinged to the push rod via the first connecting rod, and the bottom of the balance bar is hinged to the roller via the second connecting rod. A return spring and a locking rod are installed inside the sliding groove, and the locking rod slides against the inner wall of the inner cylinder.

[0014] Preferably, the opening and closing unit includes a first butterfly plate, a second butterfly plate, a third butterfly plate, and an arc-shaped plate. The first and second butterfly plates are arranged overlappingly and are both fixedly installed on the top of the partition. The third butterfly plate is slidably installed between the first and second butterfly plates, and the third butterfly plate is arranged at an angle to the upper and lower butterfly plates. An arc-shaped plate is fixed on the lifting rod, and extension plates are respectively provided at the upper and lower ends of the arc-shaped plate. The extension plates are cuboid structures, and the upper and lower extension plates are arranged perpendicular to each other. A circular hole is opened in the middle of the first and second butterfly plates to accommodate the rotation of the arc-shaped plate and the extension plates. A flat hole is opened in the middle of the third butterfly plate, and a small circular hole is added in the middle of the flat hole to accommodate the vertical movement of the lifting rod, the arc-shaped plate, and the extension plates. When the lifting rod moves up and down, it drives the third butterfly plate to rotate, and the third butterfly plate switches between opening and closing with the upper and lower butterfly plates.

[0015] Preferably, bearings and sealing rings are installed on both the upper and lower parts of the rotating drum, and the two bearings are located on the outside of the sealing rings.

[0016] Preferably, a support plate is fixedly installed at the center of the top of the hopper, the water pump is fixedly installed on the support plate, and cover plates are installed on both sides of the support plate.

[0017] Preferably, water inlet pipes and water outlet pipes are provided from the hopper to the cylinder, and the water inlet pipes and water outlet pipes convey water through openings in the inner walls of the hopper and the cylinder.

[0018] Preferably, the method for feeding feed using the device includes the following steps:

[0019] S1. Material preparation steps:

[0020] Open the covers on both sides of the hopper, place the fly larvae in the hopper, and then fix the covers; place the hopper of the device in the float ring with an inner diameter larger than the outer diameter of the hopper, so that the hopper is directly above the shrimp's living area, and the lower part of the device is immersed in the water to a depth of 50-100 cm; turn on the water pump to feed the fly larvae.

[0021] S2, Repeated steps:

[0022] The crossbar of the U-shaped frame is guided by the limiting through groove, and with the sliding of the guide rods at both ends in the cam groove on the outer circumference of the rotating drum, the rotational motion of the rotating drum is converted into a stable up-and-down reciprocating motion, which drives the lifting rod and the U-shaped frame to move up and down together. The outer surface of the rotating drum has a cam groove, which forms a continuous closed curve shape. The guide rods at both ends of the U-shaped frame are installed in the cam groove through rolling bearings. The crossbar of the U-shaped frame passes through the limiting through groove on the cylinder. Double row angular contact ball bearings are installed at both ends of the rotating drum, and nitrile rubber sealing rings are set on the outside of the bearings to ensure stability and sealing during rotation.

[0023] S3, Material Distribution Control Steps:

[0024] The lifting rod drives the arc-shaped plate and the extension plate to move up and down reciprocally. The arc-shaped plate and the extension plate move up and down within the third butterfly plate, driving the third butterfly plate to rotate within a range of 0-90 degrees, realizing the opening and closing of the opening and closing unit, and completing the feeding of fly larvae. The first butterfly plate and the second butterfly plate are fixedly installed at the bottom of the partition, so that the two butterfly plates overlap and form a fixed opening. The third butterfly plate is installed between the first butterfly plate and the second butterfly plate. The arc-shaped plate is fixedly installed on the outer periphery of the lifting rod. The upper and lower ends of the arc-shaped plate extend vertically to form extension plates at 90 degrees. The length of the extension plates matches the width of the third butterfly plate. When the lifting rod moves upward, the arc-shaped plate and the lower extension plate contact the third butterfly plate and drive it to rotate 90 degrees, forming a quarter-fan-shaped opening between the first butterfly plate and the second butterfly plate, allowing the bait to fall. The extension plates maintain vertical contact with the third butterfly plate to prevent the third butterfly plate from generating additional rotation.

[0025] S4. Push and delivery steps:

[0026] The push unit's operation process is divided into two stages: filling and pushing.

[0027] S41, Filling Stage: The upper and middle pistons are tightly fitted together and located above the piston cylinder, while the lower piston is located at the bottom of the piston cylinder to form a seal; at this time, the bait falls into the piston cylinder through the opening and closing unit.

[0028] S42, Pushing stage: The upper and lower pistons move downward synchronously under the action of the lifting rod, and the middle piston is fixed to the inner wall of the piston cylinder by the snap-fit ​​component to form a new sealing point;

[0029] S421. When the locking rod enters the U-shaped groove, the return spring pushes the locking rod to contact the inclined surface of the push rod; through the lever action of the balance bar, the roller extends into the piston cylinder.

[0030] S422. When the lower piston moves upward and touches the roller, it pushes the push rod in the opposite direction through the balance bar; the locking rod is compressed by the push rod and exits the U-shaped groove, releasing the middle piston;

[0031] At least one piston is always kept in contact with the cylinder wall inside the piston cylinder to form a sealed structure and prevent water backflow.

[0032] S43, Bait Output Steps:

[0033] The water pump pumps water out of the outlet into the mixing chamber. The middle piston pushes fly larvae and air from inside the piston cylinder into the mixing chamber to mix with the water. After mixing, the mixture enters the outer chamber through the outlet and is finally discharged to the outside through the oblique hole. The discharged air and water mix to generate bubbles that lift the fly larvae and make them float, giving the fly larvae a living dynamic characteristic.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The device of this invention uses a water pump 13 to transport water from the bottom of the equipment to the mixing chamber 26. The water flow inside the mixing chamber 26 mixes the feed pushed out by the pushing unit with air and discharges it together through the inclined hole 21. The resulting thrust causes the rotating drum 19 to rotate, driving the lifting assembly to move up and down reciprocally, which in turn causes the opening and closing unit to open intermittently to provide feed. The air and water flow discharged through the inclined hole 21 mix to generate bubbles, which lift the feed to a floating state, giving the feed a live dynamic characteristic. This not only improves the shrimp's predation efficiency and increases the shrimp's activity level, promoting meat growth, but also avoids the problem of feed settling and rotting at the bottom, polluting the water quality. The water pump 13 transports water from the bottom of the equipment to the mixing chamber 26 through pipelines and then discharges it through the inclined hole 21. During the feeding process, a water circulation is formed in the shrimp's living water area, increasing the oxygen content of the water flow, which is beneficial to the survival and growth of the shrimp.

[0036] 2. The crossbar of the U-shaped frame 18 of the lifting assembly of the present invention is guided by the limiting groove 17, and cooperates with the sliding of the guide rods 22 at both ends in the cam groove 20 on the outer periphery of the rotating cylinder 19 to convert the rotational motion of the rotating cylinder 19 into a stable up-and-down reciprocating motion; by setting a partition 35 on the upper part of the cylinder 16 to divide the interior into two downward channels, and opening the limiting groove 17 and the central cylinder 34 along the cylinder axis inside the partition 35, the effective separation of bait falling and mechanical movement is realized; the lifting rod 29 and the arc plate 36 are installed in the central cylinder 34 and move together with the U-shaped frame 18, driving the three pistons in the piston cylinder 33 to switch positions, pushing the bait to the mixing chamber 26 while expelling air to generate bubbles, so that the bait is in a floating state, simulating the dynamic characteristics of a live animal.

[0037] 3. The opening and closing unit of this invention adopts a three-butterfly plate structure in conjunction with a specially designed arc-shaped plate to realize bait dispensing; the first butterfly plate 37 and the second butterfly plate 38 are fixedly installed at the bottom of the partition plate 35 and have notches. The round holes in the middle of the two butterfly plates are used to accommodate the rotation of the arc-shaped plate 36 and the extension plate; the third butterfly plate 39 is installed between the two fixed butterfly plates. The flat hole and small round hole in the middle of the plate cooperate with the movement of the lifting rod 29 and the arc-shaped plate 36. The arc-shaped plate 36 is designed with a 90-degree inclination. The cuboid extension plates at its upper and lower ends are arranged perpendicularly to each other. This structure ensures that the third butterfly plate 39 can rotate stably within the range of 0-90 degrees. When the lifting rod 29 rises, the arc-shaped plate 36 drives the third butterfly plate 39 to rotate 90 degrees to open the notch and allow the bait to fall. When the lifting rod 29 rises, it loosens and clears the bait inside the hopper 11 to prevent the bait from getting stuck; when it falls, the third butterfly plate 39 rotates in the opposite direction to close the notch and stop the bait from being dispensed; the extension plate always remains vertical after the rotation is completed to prevent the third butterfly plate 39 from rotating additionally. The special design of the arc plate 36 and the extension plate ensures the stability and reliability of the opening and closing process, avoiding the problem of accidental leakage or blockage of bait. At the same time, the coordinated operation of the opening and closing unit and the lifting mechanism allows the bait to fall intermittently according to the predetermined rhythm, which not only ensures the uniformity of feeding, but also avoids the over-feeding of bait.

[0038] 4. The pushing unit of the present invention adopts a three-layer piston structure and a snap-fit ​​component to achieve the dual functions of precise bait pushing and bubble generation; the lower piston 30 and the upper piston 32 are fixed on the lifting rod 29, and the distance between them is less than the axial distance of the piston cylinder 33, ensuring that there is always one piston in the cylinder to form a seal during operation; the conical design at the top of the upper piston 32 facilitates the rapid sliding of bait, and the blind hole at the bottom provides installation space for the tension spring 51; the middle piston 31 can slide on the lifting rod 29 and is fixed and separated by the snap-fit ​​component.

[0039] The operation of the pushing unit is divided into two stages: filling and pushing. During filling, the upper piston 32 and the middle piston 31 are attached and located above the piston cylinder 33, while the lower piston 30 is sealed at the bottom of the cylinder. During pushing, the upper and lower pistons move down synchronously, and the middle piston 31 is fixed to the piston cylinder 33 by a snap-fit ​​component, forming a new sealing point. The snap-fit ​​component consists of a sliding groove 41, a return spring 42, a locking rod 43, etc., and achieves the locking function by driving the push rod 46 and the roller 49 to rotate through the balance rod 48. When the locking rod 43 enters the U-shaped groove 44, the return spring 42 pushes the locking rod 43 to contact the push rod 46, and the roller 49 extends due to the leverage of the balance rod 48. When the lower piston 30 touches the roller 49, it pushes in the opposite direction to make the locking rod 43 retract, releasing the middle piston 31.

[0040] This structural design ensures that a piston always forms a seal within the piston cylinder 33, preventing water backflow into the mixing chamber 26 and pushing air along with the feed into the mixing chamber 26. The expelled air forms bubbles under the action of the water flow, lifting the feed and presenting it as a live, dynamic feature. This promotes rapid feeding by shrimp, improves farming efficiency, and prevents feed from sinking to the bottom, decaying, and polluting the water. Attached Figure Description

[0041] Figure 1 This is a perspective view of the overall installation structure of the device of the present invention;

[0042] Figure 2 This is a perspective view of the internal installation structure of the device of the present invention;

[0043] Figure 3 This is a perspective view of the installation structure of the pushing unit of the device of the present invention;

[0044] Figure 4 For the appendix of the device of the present invention Figure 3 Enlarged view of the buckle component marked "A";

[0045] Figure 5 This is a three-dimensional schematic diagram of the disassembled structure of the opening and closing unit of the device of the present invention;

[0046] Figure 6 This is a three-dimensional disassembled schematic diagram of the internal structure of the device of the present invention;

[0047] In the diagram: Hopper-11; Support plate-12; Water pump-13; Inlet pipe-14; Outlet pipe-15; Cylinder-16; Limiting groove-17; U-shaped frame-18; Rotary drum-19; Cam groove-20; Inclined hole-21; Guide rod-22; Bearing-23; Sealing ring-24; Annular groove-25; Mixing chamber-26; Inlet-27; Outlet-28; Lifting rod-29; Lower piston-30; Middle piston -31; Upper piston -32; Piston cylinder -33; Central cylinder -34; Baffle plate -35; Arc plate -36; First butterfly plate -37; Second butterfly plate -38; Third butterfly plate -39; Inner cylinder -40; Slide groove -41; Return spring -42; Locking rod -43; U-shaped groove -44; Shoulder -45; Push rod -46; First connecting rod -47; Balance bar -48; Roller -49; Second connecting rod -50; Tension spring -51. Detailed Implementation

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[0049] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] Figures 1-6 As shown, a feed dispensing device for aquaculture includes a dispensing component, a feeding component, and a storage component installed on a float. The storage component is used to store feed. The bottom of the storage component is connected to the top of the dispensing component. The feeding component is installed at the bottom of the dispensing component. The storage component includes a hopper 11. A water pump 13 is installed at the top of the hopper 11. The water inlet of the water pump 13 extends through a pipe to the bottom of the dispensing component and then connects to the outside. The water outlet of the water pump 13 is connected through a pipe to the inner cavity of the dispensing component.

[0051] The feeding assembly includes a cylinder 16 with a sealed bottom. A lifting rod 29 is installed inside the cylinder 16, and an opening and closing unit is provided on the upper part of the lifting rod 29. The opening and closing unit controls the hopper 11 to release bait at intervals. A pushing unit is provided at the bottom of the lifting rod 29. The pushing unit transfers the bait inside the cylinder 16 to the feeding assembly through the outlet 28. During the transfer of bait, the pushing unit discharges the air inside the cylinder 16 and prevents water from flowing back in.

[0052] The feeding assembly includes a rotating drum 19 and a lifting unit. The rotating drum 19 is rotatably mounted on the bottom of the drum body 16. An annular groove 25 is provided inside the rotating drum 19. The annular groove 25 communicates with the outlet 28 of the pushing unit. Several oblique holes 21 are provided on the annular groove 25, which connects the annular groove 25 to the outside. The openings of the oblique holes 21 are arranged along the tangential direction of the rotating drum 19. The lifting unit includes a U-shaped frame 18, which is fixedly connected to the lifting rod 29.

[0053] The rotating drum 19 rotates under the reverse thrust of the water flow generated by the water pump 13, driving the U-shaped frame 18 and the lifting rod 29 to move up and down together, and driving the pushing unit to send the bait and air inside the hopper 11 to the outside of the rotating drum 19, so that the bait forms a floating state.

[0054] In use, the feed hopper 11 of the device is fitted into the float ring, and then placed together in the shrimp's living area, so that the lower part of the device is submerged in water for feeding. The water pump 13 can be equipped with a rechargeable power supply on one side, or can be powered by an external power source; the wiring is waterproof.

[0055] The device of this invention uses a water pump 13 to transport water from the bottom of the equipment to the mixing chamber 26. The water flow inside the mixing chamber 26 mixes the feed pushed out by the feeding unit with air, and then discharges it together through the inclined hole 21. The air and water flow mix to generate bubbles, which lift the feed and create a floating state, giving the feed a live dynamic characteristic. This improves the shrimp's predation efficiency, increases their activity level, promotes meat growth, and avoids the problem of feed settling and rotting at the bottom, polluting the water. The water pump 13 transports water from the bottom of the equipment to the mixing chamber 26 through pipelines and then discharges it through the inclined hole 21. During the feeding process, a water circulation is created in the shrimp's habitat, increasing the oxygen content of the water and promoting shrimp survival and growth.

[0056] Furthermore, a partition 35 is provided on the upper part of the cylinder 16 to divide the interior into two downward channels. A limiting groove 17 is opened in the interior of the partition 35 along the axial direction of the cylinder. A central cylinder 34 is provided in the middle of the partition 35 along the axial direction. The central cylinder 34 communicates with the interior of the limiting groove 17. An inner cylinder 40 is fixed in the bottom cavity of the cylinder 16. The inner cylinder 40 has a piston cylinder 33. An inclined surface is provided on the top of the inner cylinder 40. An outlet 28 and an inlet 27 are respectively opened on the side wall of the mixing chamber 26 below the inner cylinder 40. The inlet 27 is connected to the water outlet of the water pump 13.

[0057] See Figure 2 The partition 35 divides the interior of the cylinder 16 into two downward channels, which facilitates the feeding material inside the hopper 11 of the material storage component to fall into the pushing unit at the bottom of the cylinder 16.

[0058] A limiting groove 17 is opened inside the partition plate 35 along the axial direction of the cylinder. The crossbar of the U-shaped frame 18 is slidably installed in the limiting groove 17, which facilitates the up-and-down reciprocating movement of the U-shaped frame 18. A central cylinder 34 is set in the middle of the partition plate 35. The central cylinder 34 is connected to the inside of the limiting groove 17. The lifting rod 29, the arc plate 36, and the extension plate are installed in the central cylinder 34, which facilitates the up-and-down reciprocating movement together with the U-shaped frame 18.

[0059] An inner cylinder 40 is fixed in the bottom cavity of the cylinder 16. The inner cylinder 40 can also be integrally formed with the cylinder 16. The piston cylinder 33 of the inner cylinder 40 is equipped with three pistons that can switch positions to push the bait while expelling the air inside the cylinder 16. The expelled air forms bubbles with the water flow, and the bubbles lift the bait (such as fly larvae) into a floating state. This makes the bait (such as fly larvae) appear as living organisms, inducing shrimp to quickly prey on them, enhancing their adaptability, improving their motor function, promoting healthy and rapid growth, and improving the quality of aquaculture. The living, dynamic bait (such as fly larvae) is promptly preyed on while floating in the water flow, reducing the risk of it sinking into the mud for further decomposition and avoiding pollution of the water and aquaculture environment.

[0060] See Figure 2 and Figure 3 The top of the inner cylinder 40 is provided with an inclined surface, which facilitates the rapid sliding of bait into the piston cylinder 33. The opening of the piston cylinder 33 is provided with an outward expansion structure, which facilitates the piston to enter the piston cylinder 33 from the outside, thereby increasing the range of deviation correction.

[0061] Furthermore, the lifting unit also includes a cam groove 20, which is opened on the outer periphery of the rotating drum 19. The cam groove 20 is a continuously closed curved groove. Both ends of the U-shaped frame 18 are provided with guide rods 22. The ends of the two guide rods 22 away from the U-shaped rod are slidably installed inside the cam groove 20. The crossbar of the U-shaped frame 18 is slidably inserted into the limiting through groove 17.

[0062] See Figure 1 The cam groove 20 is set on the outer periphery of the rotating drum 19. The guide rods 22 at both ends of the U-shaped frame 18 are slidably installed inside the cam groove 20. When the rotating drum 19 rotates, the curved cam groove 20 drives the guide rods 22 on both sides to move up and down. The guide rods 22 on both sides are always at the same height in the cam groove 20 to maintain the stability of the reciprocating transmission. The crossbar of the U-shaped frame 18 is slidably inserted into the limiting through groove 17 to achieve stable up and down reciprocating motion.

[0063] Furthermore, the pushing unit includes a lower piston 30, a middle piston 31, and an upper piston 32 installed in the piston cylinder 33. The lower piston 30 is fixedly installed at the bottom end of the lifting rod 29. The middle piston 31 is slidably installed on the lifting rod 29. The upper piston 32 is fixedly installed on the lifting rod 29 and is located above the middle piston 31. A tension spring 51 is installed between the bottom end of the upper piston 32 and the top end of the middle piston 31. A blind hole (not shown in the figure) is opened at the bottom of the upper piston 32 to provide space for accommodating the tension spring 51. A snap-fit ​​component is provided between the middle piston 31 and the inner cylinder 40.

[0064] See Figure 2 , Figure 3and Figure 6 When the lifting rod 29 moves up and down, it drives the three pistons to move up and down as well. The upper piston 32 and the lower piston 30 are both fixedly installed on the lifting rod 29, and the distance between the upper piston 32 and the lower piston 30 is less than the axial distance of the piston cylinder 33. This ensures that during operation, there is always one piston inside the piston cylinder 33, which isolates the upper and lower parts of the cylinder 16, preventing water from flowing into the upper part. It also ensures that the air in the upper part can enter the mixing chamber 26 through the pushing unit and then be discharged. The discharged air forms bubbles with the water flow. The bubbles lift the bait (such as fly larvae) and make it float, so that the bait (such as fly larvae) has the dynamic movement of a living body, which induces the shrimp to quickly hunt it.

[0065] The upper piston 32 is tightly fitted with the piston cylinder 33, and the two have sufficient contact area in the axial direction to ensure sealing and sliding stability. The top of the upper piston 32 is set in a conical shape. When the upper piston 32 is disengaged from the piston cylinder 33 and is located above it, the bait can quickly slide into the piston cylinder 33 when it falls on the conical top of the upper piston 32.

[0066] When the pushing unit is working, the piston cylinder 33 has two states: filling with bait and pushing bait.

[0067] When filling with bait, the lifting rod 29 drives the three pistons to the upper position, the upper piston 32 and the middle piston 31 are in a close fit, and both are located above the top opening of the piston cylinder 33, while the lower piston 30 is located at the bottom of the piston cylinder 33 to form a sealed state; at this time, the lifting rod 29 drives the upper opening and closing unit to open, so that the bait in the hopper 11 falls into the piston cylinder 33.

[0068] When the bait is pushed, the lifting rod 29 drives the three pistons to the lower position. The upper piston 32 and the middle piston 31 are in a close contact state, and both of them move downward in the piston cylinder 33. The lower piston 30 moves downward and falls off the piston cylinder 33. The upper piston 32 and the middle piston 31 push the bait in the piston cylinder 33 into the mixing chamber 26. During the process of the upper piston 32 and the middle piston 31 moving downward together, the latching component between the middle piston 31 and the inner wall of the piston cylinder 33 forms a locking and fixing, and at this time the middle piston 31 forms a sealing state with the piston cylinder 33.

[0069] After the bait is pushed out, the lifting rod 29 moves upward, causing the upper piston 32 and the lower piston 30 to move upward together. At this time, the middle piston 31 is fixedly connected to the inner wall of the piston cylinder 33 by a snap-fit ​​component. When the lower piston 30 continues to move upward and touches the roller 49 of the snap-fit ​​component, the snap-fit ​​component releases the limiting connection on the middle piston 31. Under the action of the tension spring 51, the middle piston 31 and the upper piston 32 are fitted together, and the lower piston 30 and the inner wall of the piston cylinder 33 are sealed. This cycle continues until the next bait filling process begins.

[0070] Furthermore, the latching component includes a sliding groove 41, a return spring 42, a locking rod 43, a U-shaped groove 44, a shoulder 45, a push rod 46, a first connecting rod 47, a balance bar 48, a roller 49, a second connecting rod 50, and a pin. The middle piston 31 has a sliding groove 41 on its side wall, and the inner cylinder 40 has a U-shaped groove 44 on its inner wall. The two ends of the U-shaped groove 44 are spaced apart along the axial direction of the cylinder 16. The upper opening of the U-shaped groove 44 is opposite to the sliding groove 41, and the lower opening of the U-shaped groove is... The inside of the opening is provided with a shoulder 45; a push rod 46 is slidably provided in the upper opening of the U-shaped groove 44, and a roller 49 is provided in the lower opening of the U-shaped groove 44. A balance bar 48 is installed in the vertical section of the U-shaped groove 44 by means of a pin. The top of the balance bar 48 is hinged to the push rod 46 by means of a first connecting rod 47, and the bottom of the balance bar 48 is hinged to the roller 49 by means of a second connecting rod 50. A return spring 42 and a locking rod 43 are installed inside the slide groove 41. The locking rod 43 slides against the inner wall of the inner cylinder 40.

[0071] See Figure 4 In the middle, the balance bar 48 drives the push rod 46 and the roller 49 to rotate around the pin. When the roller 49 is located at the lower opening of the U-shaped groove 44, the push rod 46 is located at the upper opening of the U-shaped groove 44. The bottom of the balance bar 48 abuts against the shoulder 45, which restricts the second connecting rod 50 and the roller 49 from going further into the U-shaped groove 44, and at the same time restricts the shoulder 46 from extending out of the U-shaped groove 44.

[0072] When the pushing unit is working, as the lifting rod 29 drives the three pistons to move downward, when the locking rod 43 slides to the upper opening of the U-shaped groove 44, under the action of the return spring 42, the locking rod 43 is pushed into the upper opening of the U-shaped groove 44. The locking rod 43 squeezes the push rod 46 and the first connecting rod 47 to move into the U-shaped groove 44. Under the action of the balance rod 48, the roller 49 and the second connecting rod 50 are driven to extend out of the U-shaped groove 44.

[0073] As the lifting rod 29 moves upward, the middle piston 31 slides into contact with the lifting rod 29, and the middle piston 31 remains at the position of the latching component. The lifting rod 2 drives the upper piston 32 and the lower piston 30 to move upward together. When the outer wall of the lower piston 30 abuts against the roller 49, it squeezes the roller 49 and the second connecting rod 50 into the U-shaped groove 44. Under the action of the balance rod 48, it drives the first connecting rod 47 and the push rod 46 to move towards the opening of the U-shaped groove 44, pushing out the locking rod 43. At this time, the tension spring 51 pulls the middle piston 31 to the upper piston 32. The locking mechanism enables the middle piston 31 to be fixed and switched between its fixed and separated states. While pushing the bait out, it ensures that there is always a piston inside the piston cylinder 33, separating the mixing chamber 26 and the piston cylinder 33. This prevents water from flowing into the upper part of the piston cylinder 33, allowing the pushing component to expel air along with the water flow. This generates air bubbles that lift the bait (such as fly larvae), creating live, dynamic bait (such as fly larvae). The bait (such as fly larvae) is then caught and consumed in time while floating in the water flow, promoting shrimp growth while reducing the sinking and decay of bait that pollutes the water.

[0074] Furthermore, the opening and closing unit includes a first butterfly plate 37, a second butterfly plate 38, a third butterfly plate 39, and an arc-shaped plate 36. The first butterfly plate 37 and the second butterfly plate 38 are arranged overlappingly and are both fixedly installed on the top of the partition plate 35. The third butterfly plate 39 is slidably installed between the first butterfly plate 37 and the second butterfly plate 38, and the third butterfly plate 39 is arranged at a 90-degree angle to the upper and lower butterfly plates. The arc-shaped plate 36 is fixed on the lifting rod 29, and extension plates are respectively provided at the upper and lower ends of the arc-shaped plate 36. The extension plates are cuboids. The structure includes upper and lower extension plates that are perpendicular to each other at 90 degrees. Both the first butterfly plate 37 and the second butterfly plate 38 have circular holes in their middle portions, which are used to accommodate the rotation of the arc-shaped plate 36 and the extension plates. The third butterfly plate 39 has a flat hole in its middle portion, with a small circular hole in the middle of the flat hole to accommodate the vertical movement of the lifting rod 29, the arc-shaped plate 36, and the extension plates. When the lifting rod 29 moves vertically, it drives the third butterfly plate 39 to rotate, creating an open or closed switching between the third butterfly plate 39 and the upper and lower butterfly plates.

[0075] See Figure 2 and Figure 5 The first butterfly plate 37 and the second butterfly plate 38 are fixedly installed inside the cylinder 16. The first butterfly plate 37 and the second butterfly plate 38 are in an upper and lower position with a certain distance between them. The first butterfly plate 37 and the second butterfly plate 38 are located on the upper part of the partition 35 and have notches. The notches allow the channels on both sides of the partition 35 to communicate with the hopper 11, which facilitates the feeding material in the hopper 11 to fall into the cylinder 16 through the notches.

[0076] A third butterfly plate 39 is rotatably installed between the first butterfly plate 37 and the second butterfly plate 38. The main body of the third butterfly plate 39 is located at the gap between the first butterfly plate 37 and the second butterfly plate 38, preventing the bait above from falling. When the lifting rod 29 rises and moves the arc plate 36 and the extension plate, the arc plate 36 and the extension plate move upward in the third butterfly plate 39, causing the third butterfly plate 39 to rotate 90 degrees to open the gap and allow the bait to fall. When the lifting rod 29 descends, it causes the third butterfly plate 39 to rotate 90 degrees in the opposite direction, closing the gap and preventing the bait above from falling.

[0077] The arc-shaped plate 36 is tilted at 90 degrees. The extension plates at the upper and lower ends of the arc-shaped plate 36 are cuboid structures and are set vertically at 90 degrees. When the third butterfly plate 39 completes a 90-degree rotation through the arc-shaped plate 36, the extension plates are in a vertical sliding state in the third butterfly plate 39 and will not change the angle of the third butterfly plate 39. This allows the third butterfly plate 39 to be kept between 0 and 90 degrees to switch between opening and closing the bait inlet.

[0078] Furthermore, bearings 23 and sealing rings 24 are installed on both the upper and lower parts of the rotating drum 19, with the two bearings 23 located on the outside of the sealing rings 24.

[0079] See Figure 6 The bearing 23 enables the rotating drum 19 to rotate stably, while the sealing ring 24 located on the inner side can effectively prevent water and air leakage. This structural arrangement allows the bearing 23 to better withstand the rotational load, and the sealing ring 24 to fully perform its sealing function, ensuring the stability and reliability of the rotating drum 19.

[0080] Furthermore, a support plate 12 is fixedly installed at the top center of the hopper 11, and the water pump 13 is fixedly installed on the support plate 12. Cover plates are installed on both sides of the support plate 12 respectively.

[0081] See Figure 1 The support plate 12 provides a stable installation base for the water pump 13, while the cover plate protects the feed inside the hopper 11 from rainwater entering or birds snatching the feed; feed can also be added by opening the cover plate.

[0082] Furthermore, water inlet pipes 14 and water outlet pipes 15 are provided from the hopper 11 to the cylinder 16, and the water inlet pipes 14 and water outlet pipes 15 convey water through openings in the inner walls of the hopper 11 and the cylinder 16.

[0083] The water pump 13 transports water from the bottom of the equipment to the mixing chamber 26 through a pipeline, and then discharges it through the inclined hole 21. During the feeding process, the water circulation in the shrimp's living area is formed, which increases the oxygen content of the water flow and is beneficial to the survival and growth of the shrimp.

[0084] The method of feeding feed using a device includes the following steps:

[0085] S1. Material preparation steps:

[0086] Open the covers on both sides of the feed hopper 11, place the fly larvae in the feed hopper 11, and then fix the covers; fit the feed hopper 11 of the device into the float ring with an inner diameter larger than the outer diameter of the feed hopper 11, so that the feed hopper 11 is directly above the living area of ​​the shrimp, and the lower part of the device is immersed in the water to a depth of 50-100 cm; turn on the water pump 13 to feed the fly larvae.

[0087] S2, Repeated steps:

[0088] The crossbar of the U-shaped frame 18 is guided by the limiting through groove 17, and with the sliding of the guide rods 22 at both ends in the cam groove 20 on the outer periphery of the rotating drum 19, the rotational motion of the rotating drum 19 is converted into a stable up-and-down reciprocating motion, which drives the lifting rod 29 and the U-shaped frame 18 to move up and down together.

[0089] A cam groove 20 is formed on the outer surface of the rotating drum 19, and the cam groove 20 forms a continuous closed curve shape; the guide rods 22 at both ends of the U-shaped frame 18 are installed in the cam groove 20 through rolling bearings; the crossbar of the U-shaped frame 18 passes through the limiting through groove 17 on the cylinder 16; double row angular contact ball bearings 23 are installed at both ends of the rotating drum 19, and nitrile rubber sealing rings 24 are set on the outside of the bearings 23 to ensure stability and sealing during rotation;

[0090] S3, Material Distribution Control Steps:

[0091] The lifting rod 29 drives the arc plate 36 and the extension plate to move up and down together. The arc plate 36 and the extension plate move up and down in the third butterfly plate 39, driving the third butterfly plate 39 to rotate within the range of 0-90 degrees, realizing the opening and closing of the opening and closing unit, and completing the feeding of fly larvae.

[0092] A first butterfly plate 37 and a second butterfly plate 38 are fixedly installed at the bottom of the partition 35, so that the two butterfly plates overlap and form a fixed opening; a third butterfly plate 39 is installed between the first butterfly plate 37 and the second butterfly plate 38; an arc-shaped plate 36 is fixedly installed on the outer periphery of the lifting rod 29, and the upper and lower ends of the arc-shaped plate 36 extend vertically to form extension plates at 90 degrees, the length of which matches the width of the third butterfly plate 39; when the lifting rod 29 moves upward, the arc-shaped plate 36 and the lower extension plate contact the third butterfly plate 39 and drive it to rotate 90 degrees, forming a quarter-fan-shaped opening between the first butterfly plate 37 and the second butterfly plate 38, allowing the bait to fall; the extension plates maintain vertical contact with the third butterfly plate 39 to prevent the third butterfly plate 39 from generating additional rotation;

[0093] S4. Push and delivery steps:

[0094] The push unit's operation process is divided into two stages: filling and pushing.

[0095] S41, Filling stage: The upper piston 32 and the middle piston 31 are closely attached and located above the piston cylinder 33, while the lower piston 30 is located at the bottom of the piston cylinder 33 to form a seal; at this time, the bait falls into the piston cylinder 33 through the opening and closing unit.

[0096] S42, Pushing stage: The upper piston 32 and the lower piston 30 move downward synchronously under the drive of the lifting rod 29, and the middle piston 31 is fixed to the inner wall of the piston cylinder 33 by the snap-fit ​​component to form a new sealing point;

[0097] S421. When the locking rod 43 enters the U-shaped groove 44, the return spring 42 pushes the locking rod 43 to contact the inclined surface of the push rod 46; through the lever action of the balance rod 48, the roller 49 extends into the piston cylinder 33;

[0098] S422 When the lower piston 30 moves upward and touches the roller 49, it pushes the push rod 46 in the opposite direction through the balance bar 48; the locking rod 43 is compressed by the push rod 46 and exits the U-shaped groove 44, releasing the middle piston 31.

[0099] At least one piston is always kept in contact with the cylinder wall inside the piston cylinder 33 to form a sealed structure and prevent water backflow.

[0100] S43, Bait Output Steps:

[0101] The water pump 13 pumps water out through the outlet 28 into the mixing chamber 26. The middle piston 31 pushes the fly larvae and air from inside the piston cylinder 33 into the mixing chamber 26 to mix with the water. After mixing, the mixture enters the annular groove 25 through the outlet 28 and is finally discharged to the outside through the inclined hole 21. The air and water mixed together to generate bubbles that lift the fly larvae and make them float, giving the fly larvae a live dynamic characteristic.

[0102] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that all related improvements to the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A feed dispensing device for aquaculture, comprising a feed dispensing component, a feed feeding component, and a feed storage component mounted on a float, wherein the feed storage component is used to store feed, characterized in that, The bottom of the storage component is connected to the top of the distribution component. A feeding component is installed at the bottom of the distribution component. The storage component includes a hopper (11). A water pump (13) is installed at the top of the hopper (11). The water inlet of the water pump (13) extends through a pipeline to the bottom of the distribution component and then connects to the outside. The water outlet of the water pump (13) is connected through a pipeline to the inner cavity of the distribution component. The feeding assembly includes a cylinder (16), the bottom of the cylinder (16) is sealed, a lifting rod (29) is installed inside the cylinder (16), an opening and closing unit is provided on the upper part of the lifting rod (29), the opening and closing unit controls the hopper (11) to intermittently release bait, a pushing unit is provided at the bottom of the lifting rod (29), the pushing unit transfers the bait inside the cylinder (16) to the feeding assembly through the outlet (28), during the transfer of bait, the pushing unit discharges the air inside the cylinder (16) and prevents water from flowing back in; The feeding assembly includes a rotating drum (19) and a lifting unit. The rotating drum (19) is rotatably mounted on the bottom of the cylinder body (16). An annular groove (25) is provided on the rotating drum (19). The annular groove (25) communicates with the outlet (28) of the pushing unit. Several oblique holes (21) are provided on the annular groove (25). The oblique holes (21) connect the annular groove (25) to the outside. The openings of the oblique holes (21) are arranged along the tangent direction of the rotating drum (19). The lifting unit includes a U-shaped frame (18). The U-shaped frame (18) is fixedly connected to the lifting rod (29). The rotating drum (19) rotates under the reverse thrust of the water flow generated by the water pump (13), driving the U-shaped frame (18) and the lifting rod (29) to move up and down together, so that the pushing unit sends the bait and air inside the hopper (11) to the outside of the rotating drum (19), generating bubbles to make the bait float. The upper part of the cylinder (16) is provided with a partition (35) to divide the interior into two downward channels. A limiting groove (17) is opened in the interior of the partition (35) along the axial direction of the cylinder. A central cylinder (34) is provided in the middle of the partition (35) along the axial direction. The central cylinder (34) is connected to the interior of the limiting groove (17). An inner cylinder (40) is fixed in the bottom cavity of the cylinder (16). The inner cylinder (40) has a piston cylinder (33). An inclined surface is provided on the top of the inner cylinder (40). An outlet (28) and an inlet (27) are respectively opened on the side wall of the mixing chamber (26) below the inner cylinder (40). The inlet (27) is connected to the water outlet of the water pump (13). The pushing unit includes a lower piston (30), a middle piston (31) and an upper piston (32) installed in the piston cylinder (33). The lower piston (30) is fixedly installed at the bottom end of the lifting rod (29). The middle piston (31) is slidably sleeved on the lifting rod (29). The upper piston (32) is fixedly installed on the lifting rod (29) and is located above the middle piston (31). A tension spring (51) is installed between the bottom end of the upper piston (32) and the top end of the middle piston (31). A snap-fit ​​component is provided between the middle piston (31) and the inner cylinder (40).

2. The feed dispensing device for aquaculture according to claim 1, characterized in that, The lifting unit also includes a cam groove (20), which is opened on the outer periphery of the rotating drum (19). The cam groove (20) is a continuously closed curved groove. Both ends of the U-shaped frame (18) are provided with guide rods (22). The ends of the two guide rods (22) away from the U-shaped rod are slidably installed inside the cam groove (20). The crossbar of the U-shaped frame (18) slides through the limiting through groove (17).

3. The feed dispensing device for aquaculture according to claim 2, characterized in that, The latching component includes a sliding groove (41), a return spring (42), a locking rod (43), a U-shaped groove (44), a shoulder (45), a push rod (46), a first connecting rod (47), a balance bar (48), a roller (49), a second connecting rod (50), and a pin. The sliding groove (41) is provided on the side wall of the middle piston (31), and the U-shaped groove (44) is provided on the inner wall of the inner cylinder (40). The two ends of the U-shaped groove (44) are spaced apart along the axial direction of the cylinder (16). The upper opening of the U-shaped groove (44) is opposite to the sliding groove (41), and the lower opening of the U-shaped groove is... A shoulder (45) is provided in the part; a push rod (46) is slidably provided in the upper opening of the U-shaped groove (44), and a roller (49) is provided in the lower opening of the U-shaped groove (44); a balance bar (48) is installed in the vertical section of the U-shaped groove (44) by means of a pin; the top of the balance bar (48) is hinged to the push rod (46) by means of a first connecting rod (47), and the bottom of the balance bar (48) is hinged to the roller (49) by means of a second connecting rod (50); a return spring (42) and a locking rod (43) are installed inside the slide groove (41), and the locking rod (43) slides against the inner wall of the inner cylinder (40).

4. The feed dispensing device for aquaculture according to claim 3, characterized in that, The opening and closing unit includes a first butterfly plate (37), a second butterfly plate (38), a third butterfly plate (39), and an arc-shaped plate (36). The first butterfly plate (37) and the second butterfly plate (38) are arranged in an overlapping manner and are both fixedly installed on the top of the partition plate (35). The third butterfly plate (39) is slidably installed between the first butterfly plate (37) and the second butterfly plate (38), and the third butterfly plate (39) is arranged perpendicularly to the upper and lower butterfly plates. The arc-shaped plate (36) is fixed on the lifting rod (29), and extension plates are respectively provided at the upper and lower ends of the arc-shaped plate (36). The structure is a cuboid, with the upper and lower extension plates arranged perpendicularly to each other; the first butterfly plate (37) and the second butterfly plate (38) each have a round hole in the middle, which is used to accommodate the rotation of the arc plate (36) and the extension plate; the third butterfly plate (39) has a flat hole in the middle, and a small round hole is added in the middle of the flat hole to accommodate the up and down movement of the lifting rod (29), the arc plate (36) and the extension plate. When the lifting rod (29) moves up and down, it drives the third butterfly plate (39) to rotate, and the third butterfly plate (39) and the upper and lower butterfly plates form an open or closed switching.

5. The feed dispensing device for aquaculture according to claim 4, characterized in that, The upper and lower parts of the rotating drum (19) are equipped with bearings (23) and sealing rings (24), and the two bearings (23) are located on the outside of the sealing rings (24).

6. The feed dispensing device for aquaculture according to claim 5, characterized in that, The support plate (12) is fixedly installed at the top center of the hopper (11), and the water pump (13) is fixedly installed on the support plate (12). Cover plates are installed on both sides of the support plate (12).

7. The feed dispensing device for aquaculture according to claim 6, characterized in that, Water inlet pipe (14) and water outlet pipe (15) are provided from the hopper (11) to the cylinder (16). The water inlet pipe (14) and water outlet pipe (15) are conveyed through openings in the inner walls of the hopper (11) and the cylinder (16).

8. A method for feeding feed using the apparatus of claim 7, characterized in that, Includes the following steps: S1. Material preparation steps: Open the covers on both sides of the feed hopper (11), place the feed in the feed hopper (11), and then fix the covers; place the feed hopper (11) of the device in a float ring with an inner diameter larger than the outer diameter of the feed hopper (11), so that the feed hopper (11) is located directly above the living area of ​​the shrimp, and the lower part of the device is immersed in the water to a depth of 50-100 cm; turn on the water pump (13) to feed the shrimp; S2, Repeated steps: The crossbar of the U-shaped frame (18) is guided by the limiting through groove (17), and the guide rods (22) at both ends slide in the cam groove (20) on the outer periphery of the rotating drum (19), converting the rotational motion of the rotating drum (19) into up-and-down reciprocating motion, which drives the U-shaped frame (18) and the lifting rod (29) to move up and down together. A cam groove (20) is opened on the outer surface of the rotating drum (19), and the cam groove (20) forms a continuous closed curve shape; the guide rods (22) at both ends of the U-shaped frame (18) are installed in the cam groove (20) through rolling bearings; the crossbar of the U-shaped frame (18) passes through the limiting through groove (17) on the cylinder (16); bearings (23) are installed at both ends of the rotating drum (19), and sealing rings (24) are set on the outside of the bearings (23) to ensure stability and sealing during rotation; S3, Material Distribution Control Steps: The lifting rod (29) drives the arc plate (36) and the extension plate to move up and down together. The arc plate (36) and the extension plate move up and down in the third butterfly plate (39), driving the third butterfly plate (39) to rotate within the range of 0-90 degrees, realizing the opening and closing of the opening and closing unit, and completing the release of the bait. A first butterfly plate (37) and a second butterfly plate (38) are fixedly installed at the bottom of the partition (35), so that the two butterfly plates overlap and form a fixed opening; a third butterfly plate (39) is installed between the first butterfly plate (37) and the second butterfly plate (38); an arc-shaped plate (36) is fixedly installed on the outer periphery of the lifting rod (29), and two vertical extension plates extend from the upper and lower ends of the arc-shaped plate (36), the length of the extension plates matching the width of the third butterfly plate (39); when the lifting rod (29) moves upward, the arc-shaped plate (36) and the lower extension plate contact the third butterfly plate (39) and drive it to rotate, forming a fan-shaped opening between the first butterfly plate (37) and the second butterfly plate (38), allowing the bait to fall; the extension plates maintain vertical contact with the third butterfly plate (39) to prevent the third butterfly plate (39) from generating additional rotation; S4. Push and delivery steps: The push unit's operation process is divided into two stages: filling and pushing. S41, Filling stage: The upper piston (32) and the middle piston (31) are closely attached and located above the piston cylinder (33), and the lower piston (30) is located at the bottom of the piston cylinder (33) to form a seal; at this time, the bait falls into the piston cylinder (33) through the opening and closing unit; S42, Pushing stage: The upper piston (32) and the lower piston (30) move downward synchronously under the action of the lifting rod (29), and the middle piston (31) is fixed to the inner wall of the piston cylinder (33) through the snap-fit ​​component to form a new sealing point; S421, when the locking rod (43) enters the U-shaped groove (44) to form a locking and fixing, the return spring (42) pushes the locking rod (43) to contact the push rod (46); through the lever action of the balance bar (48), the roller (49) extends into the piston cylinder (33); S422. When the locking rod (43) is released from the fixed connection with the U-shaped groove (44), when the lower piston (30) moves upward and touches the roller (49), the push rod (46) is pushed in the opposite direction by the balance rod (48); the locking rod (43) is compressed by the push rod (46) and exits the U-shaped groove (44), releasing the middle piston (31); at least one piston is always kept in contact with the cylinder wall inside the piston cylinder (33) to form a sealing structure to prevent water backflow; S43, Bait Output Steps: The water pump (13) pumps water out through the outlet (28) into the mixing chamber 26. The middle piston (31) pushes the fly larvae and air from inside the piston cylinder (33) into the mixing chamber (26) to mix with the water. After mixing, the mixture enters the annular groove (25) through the outlet (28) and is finally discharged to the outside through the inclined hole (21). The discharged air and water mix to generate bubbles that lift the bait and form a floating state, making the bait exhibit live dynamic characteristics.

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