Nutrient slow-release feeding device for freshwater fish marine culture

Abstract

The invention discloses a freshwater fish mariculture nutrition slow-release feeding device, which belongs to the technical field of aquaculture, and comprises a floating body with buoyancy, a feed box for storing feed is erected above the floating body through a support rod, and a discharge port of the feed box is arranged at the bottom and is provided with an electric control valve. A guide plate obliquely arranged downwards is arranged at a feed outlet of the feed box, a blanking box is arranged at the tail end of the guide plate and is a vertically-through box body, and the upper edge of the box body is connected with the tail end of the guide plate. By means of the device, the effects of slow feed release, poor marine water adaptability, moving flexibility and the like in the freshwater fish marine process can be achieved.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, specifically to a slow-release feeding device for freshwater fish aquaculture. Background Technology

[0002] In the aquaculture sector, freshwater fish marine aquaculture is a farming model that expands farming space and improves farming efficiency. In a marine environment, freshwater fish are affected by changes in water salinity, and their feeding pace is slower than in traditional freshwater aquaculture. Furthermore, marine aquaculture water bodies often have characteristics such as large fluctuations in water flow speed and unstable local water environments. Therefore, if feed cannot be released slowly, it can easily lead to feed sinking to the bottom and being wasted, or eutrophication and pollution of the water body. Alternatively, concentrated feed delivery can lead to uneven feeding of fish, affecting the efficiency of freshwater fish's adaptation to marine aquaculture and their growth quality.

[0003] In the prior art, there has been relevant research on feeding devices for aquaculture. For example, publication number WO2025154105A1 discloses a feed dispensing and distribution device that uses a rotary-connected dispensing unit to uniformly distribute a portion of feed at a time on an aquaculture cage. The device includes a feed container, a dispenser, a feed conduit, a weighing device suitable for determining the weight of feed not yet released from the feed container and feed conduit, a rotary feed dispenser including a rotating disc, radial blades, a rotary actuator for driving the rotary feed dispenser, and a computing device that adjusts the speed of the rotary feed dispenser relative to the weight of feed not yet released onto the rotary feed dispenser during the dispensing of a portion of feed. Another publication number, IN202541033073A, discloses an IoT-based intelligent feeding device that integrates artificial intelligence and IoT to optimize feed dispensing, thereby ensuring the management of aquaculture, livestock feeding, and controlled environment agriculture. The AIoT-based intelligent feeding device includes a frame, a hopper assembly, a dispensing unit, multiple floating components, a power system, hydrophone sensors, and a communication interface. AIoT-based smart feeding devices prevent water pollution in aquaculture by ensuring that excess feed does not accumulate in the water, thereby optimizing feed scheduling, improving nutrient absorption, and minimizing the use of excess resources. However, existing technologies still have room for improvement in areas such as feed slow release, poor adaptability to marine water conditions, and mobility during the marineization process of freshwater fish. Summary of the Invention

[0004] The purpose of this invention is to provide a slow-release feeding device for freshwater fish culture that can improve the effects of slow-release feed, poor adaptability to marine water, and mobility during the marineization process of freshwater fish.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: a slow-release feeding device for freshwater fish aquaculture, comprising a buoyant float, a feed box for feed storage mounted on top of the float via a support rod, a feed box outlet located at the bottom of the feed box and equipped with an electrically controlled valve, a downwardly inclined guide plate at the feed box outlet, and a discharge box at the end of the guide plate, the discharge box being a vertically connected box with its upper edge connected to the end of the guide plate. The present invention uses the float to provide buoyancy to ensure the device floats on the aquaculture water, wherein the support rod is used to support the feed box, keeping it above the water surface to prevent aquaculture water from entering the feed box and contaminating the feed inside, and the electrically controlled valve at the bottom of the feed box controls the start, stop, and rate of feed dispensing, working in conjunction with the downwardly inclined guide plate to guide the feed smoothly from the feed box to the discharge box, where the feed delivered by the guide plate is received and discharged in an orderly manner, reducing waste caused by disorderly scattering and sinking to the bottom, and avoiding eutrophication pollution caused by localized feed concentration.

[0006] According to one embodiment of the present invention, a first snap-fit ​​plate is arranged parallel to the lower end of the inner wall of the feed box, and a brush strip is snapped onto the snap-fit ​​plate. A second snap-fit ​​plate with an angle to the bottom of the first snap-fit ​​plate is provided, and a brush strip is snapped onto the second snap-fit ​​plate. The first snap-fit ​​plate, which is parallel to the lower end of the inner wall of the feed box, forms a first layer of flexible interception structure after snapping onto the brush strip. The second snap-fit ​​plate with an angle to the bottom of the first snap-fit ​​plate forms a second layer of inclined interception structure. The two layers of brush strips work together to slow down the speed at which the feed falls from the feed box, thereby achieving slow release of feed nutrients. At the same time, the two layers of brush strips with an angle are used to disperse the feed, preventing the feed from accumulating and clogging in the feed box, ensuring continuous feeding. Furthermore, the structure in which the brush strips are snapped onto the first snap-fit ​​plate and the second snap-fit ​​plate facilitates the disassembly and replacement of the brush strips in the future, reducing maintenance costs, and also reducing the splashing of water waves into the guide plate and the discharge port at the bottom of the feed box.

[0007] According to one embodiment of the present invention, a vibration motor is provided at the bottom of the guide plate, and the vibration motor is mounted on the float. The vibration motor generates a small vibration on the guide plate, which effectively prevents feed from sticking and accumulating on the surface of the guide plate, solves the problem of conveying blockage caused by feed moisture or particle agglomeration, and ensures that the feed flows smoothly from the feed box outlet through the guide plate to the discharge box. At the same time, the vibration can also make the feed on the guide plate evenly distributed, avoiding uneven feeding caused by local accumulation.

[0008] According to one embodiment of the present invention, a buffer assembly is provided below the float, and one side of the buffer assembly is connected to a remotely controlled boat that can move on the water surface via a connecting assembly and a rope. The buffer assembly is used to buffer the impact of water flow and waves on the float in marine aquaculture water, reduce the swaying of the float and the feed box, guide plate and other components above it, and prevent feed from spilling or clogging due to swaying. Furthermore, the buffer assembly is connected to the remotely controlled boat that can move on the water surface via the connecting assembly and a rope, and the remotely controlled boat can drive the entire feeding device to move flexibly in the aquaculture area to achieve large-scale, multi-location precise feeding.

[0009] According to one embodiment of the present invention, the buffer assembly includes a buffer frame with a frame structure. The buffer frame has multiple parallel supporting rods, and a first buffer plate is connected to the supporting rods via an array of flexible connecting rods. The frame structure of the buffer frame ensures the overall structural rigidity of the buffer assembly and prevents deformation under stress. Furthermore, the multiple parallel supporting rods within the buffer frame evenly distribute the water flow and wave impact forces transmitted by the first buffer plate, preventing local overload damage and reducing the water flow velocity around the buffer assembly to slow down the settling speed of surrounding feed. Moreover, the exchange of water around the buffer assembly is enhanced under the interference of the first buffer plate, thus improving the light refraction effect of the water and enhancing fish's recognition of feed in the water. Additionally, the flexible connecting rods arrayed below the supporting rods absorb impact energy through their own deformation, weakening the transmission of impact to the float and reducing float sway. The first buffer plate connected by the flexible connecting rods can directly withstand water impacts, forming a multi-layered buffer with the flexible connecting rods, effectively improving the stability of the device in undulating water in marine aquaculture.

[0010] According to one embodiment of the present invention, the first buffer plate has a concave arc surface, and the concave arc surfaces of the first buffer plates below adjacent support rods face different directions. The concave arc surface structure of the first buffer plate is used to distribute the impact force to different areas of the arc surface when receiving water flow and wave impact from marine aquaculture water, thereby weakening the direct impact on the buffer components. Furthermore, since the concave arc surfaces of the first buffer plates below adjacent support rods face different directions, they can simultaneously cope with water flow impacts from multiple directions, preventing the device from tilting or shaking violently due to excessive unidirectional force, and further ensuring the stability of the feed box and guide plate above the float.

[0011] According to one embodiment of the present invention, the connecting assembly includes a connecting bracket, on which a telescopic second hydraulic rod is provided. The telescopic end of the second hydraulic rod is connected to a swing plate, the bottom of which is hinged to the connecting bracket. The other end of the swing plate is connected to a first hydraulic rod, the end of which is mounted on a buffer assembly. The second hydraulic rod can drive the connected swing plate to swing around its hinge point with the connecting bracket. In conjunction with the first hydraulic rod connected to the other end of the swing plate, the swing angle and amplitude can be adjusted. Thus, the first hydraulic rod, mounted on the buffer assembly, achieves a stable connection between the connecting assembly and the buffer assembly. Furthermore, the extension and retraction of the hydraulic rod, in conjunction with the swing plate, buffers the pulling force during remote-controlled boat towing, reducing the impact on the buffer assembly and the buoy.

[0012] According to one embodiment of the present invention, the side of the buffer assembly is connected to the connecting assembly via a connecting bracket. Specifically, the side of the buffer frame of the buffer assembly is connected to the connecting bracket of the connecting assembly via a connecting bracket, which ensures a stable connection between the buffer assembly and the connecting assembly, preventing relative displacement of the two under device movement or water impact. When the remote-controlled boat passes the towing device of the connecting assembly, the traction force can be smoothly transmitted to the buffer frame through the connecting bracket and the first hydraulic rod, and then distributed by the buffer frame to the internal support partitions and other components of the buffer assembly, reducing local overload and ensuring the stable buffering effect of the buffer assembly on the float.

[0013] According to one embodiment of the present invention, the feed box has an openable and closable cover, which facilitates the replenishment of feed into the feed box and also prevents salt spray, impurities and rainwater in the marine aquaculture environment from entering the feed box. An air tank connected to the inside of the feed box is provided on one side of the feed box to balance the air pressure when the feed in the feed box decreases and the internal space of the box increases, to prevent the formation of negative pressure in the box that would cause the feed to be blocked from the bottom outlet, and to ensure that the feed flows smoothly to the guide plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The rolling element under the feed box of the present invention is connected to the buffer frame through two symmetrically arranged first connecting rods, which can stably support the rolling element and position it, and prevent the rolling element from shifting due to water fluctuations. Furthermore, the solution of the present invention can guide the direction of feed diffusion, prevent local accumulation of feed, improve feeding uniformity, and the overall structure ensures stable feed diffusion, which is suitable for the feeding needs of freshwater fish in marine aquaculture. Attached Figure Description

[0015] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the freshwater fish marine aquaculture nutrient slow-release feeding device of the present invention in use. Figure 2 This is a schematic diagram of the slow-release nutrient feeding device for freshwater fish marine aquaculture according to the present invention; Figure 3 This is a schematic diagram of the feeding component scheme of the present invention; Figure 4 This is a schematic diagram of the connection scheme between the first snap-fit ​​plate, the second snap-fit ​​plate and the brush strip on one side of the material box of the present invention; Figure 5 This is a schematic diagram of the connection scheme for the connecting component, buffer component, and rolling element of the present invention. Figure 6 This is a schematic diagram of the buffer component scheme of the present invention; Figure 7 This is a schematic diagram of the rolling element solution of the present invention; Figure 8 This is a schematic diagram of the connection component scheme of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 10. Remote-controlled boat; 20. Connecting assembly; 21. Connecting bracket; 22. First hydraulic rod; 23. Second hydraulic rod; 24. Connecting bracket; 30. Buffer assembly; 31. Buffer frame; 32. Supporting partition; 33. Flexible connecting rod; 34. First buffer plate; 40. Feeding assembly; 41. Feed box; 42. Feed drop box; 43. Air tank; 44. Support rod; 45. Vibrating motor; 46. Guide plate; 47. Brush strip; 48. First snap-fit ​​plate; 49. Second snap-fit ​​plate; 50. Rolling element; 51. First connecting rod; 52. Blade; 53. Rotating plate; 54. Rotating shaft; 55. Side plate; 60. Float. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Example 1: As shown in the attached figure Figure 1 - Appendix Figure 8 As shown, the freshwater fish marine aquaculture nutrient slow-release feeding device includes a buoyant float 60. A feed box 41 for feed storage is mounted on the float 60 via a support rod 44. The feed box 41 has an outlet at the bottom and an electrically controlled valve. The feed box 41 has a downwardly inclined guide plate 46 at the outlet. The end of the guide plate 46 has a dropping box 42, which is a box that runs vertically through the body. The upper edge of the box is connected to the end of the guide plate 46. This invention uses a float 60 to provide buoyancy to ensure the device floats on the marine aquaculture water. The support rod 44 is used to support the feed box 41, making the feed box 41 higher than the water surface, thus preventing marine water from entering the feed box 41 and contaminating the feed inside. The electric control valve at the bottom of the feed box 41 is used to control the start and stop of the feed and the rate of discharge. Together with the downward inclined guide plate 46, the feed is guided to flow smoothly from the feed box 41 to the feed drop box 42. The feed is then received by the guide plate 46 in the vertically connected feed drop box 42 and falls down, forming an orderly drop of feed. This reduces the waste caused by feed settling to the bottom due to disorderly scattering and avoids eutrophication pollution of the water caused by localized feed concentration.

[0021] See appendix Figure 4 As shown, a first snap-fit ​​plate 48 is arranged parallel to the lower end of the inner wall of the material feeding box 42, and a brush strip 47 is snapped onto the snap-fit ​​plate 48. A second snap-fit ​​plate 49 with an angle to the bottom of the first snap-fit ​​plate 48 is provided, and a brush strip 47 is snapped onto the second snap-fit ​​plate 49. A first snap-fit ​​plate 48 is parallel to the lower end of the inner wall of the feed box 42. After snapping the brush strips 47, it forms a first layer of flexible interception structure. A second snap-fit ​​plate 49, which forms an angle with the bottom of the first snap-fit ​​plate 48, forms a second layer of inclined interception structure. The two layers of brush strips 47 work together to slow down the speed at which the feed falls from the feed box 42, so as to achieve slow release of feed nutrients. At the same time, the two layers of brush strips 47 set at an angle are used to disperse the feed, so as to prevent the feed from accumulating and clogging in the feed box 42, ensuring the continuity of feeding. Moreover, the structure of the brush strips 47 snapped together by the first snap-fit ​​plate 48 and the second snap-fit ​​plate 49 makes it easy to disassemble and replace the brush strips 47 in the future, reducing maintenance costs. It can also reduce the splashing of water waves into the guide plate 46 and the discharge port at the bottom of the feed box 41.

[0022] See appendix Figure 2 As shown, the bottom of the guide plate 46 has a vibration motor 45, which is mounted on the float 60. The vibration motor 45 generates a small vibration on the guide plate 46, effectively preventing feed from sticking and accumulating on the surface of the guide plate 46. This solves the problem of conveying blockage caused by feed moisture or pellet clumping, ensuring that the feed flows smoothly from the feed box 41 outlet through the guide plate 46 to the feed box 42. At the same time, the vibration also makes the feed on the guide plate 46 evenly distributed, avoiding uneven feeding caused by local accumulation.

[0023] See appendix Figure 5 Appendix Figure 6 As shown, a buffer assembly 30 is provided below the float 60. One side of the buffer assembly 30 is connected to a remotely controlled boat 10 that can move on the water surface via a connecting assembly 20 and a rope. The buffer assembly 30 is used to buffer the impact of water flow and waves in the marine aquaculture water on the float 60, reduce the swaying of the float 60 and the feed box 41, guide plate 46 and other components above it, and prevent feed from spilling or clogging due to swaying. Furthermore, the buffer assembly 30 is connected to the remotely controlled boat 10 that can move on the water surface via the connecting assembly 20 and a rope. The remotely controlled boat 10 can drive the entire feeding device to move flexibly in the aquaculture area, realizing large-scale and multi-location precise feeding.

[0024] See appendix Figure 6 As shown, the buffer assembly 30 includes a buffer frame 31 with a frame structure. The buffer frame 31 has multiple parallel supporting rods 32. A first buffer plate 34 is connected to the supporting rods 32 via an array of flexible connecting rods 33. The buffer frame 31 ensures the overall structural rigidity of the buffer assembly 30, preventing deformation under stress. Furthermore, the multiple parallel supporting rods 32 within the buffer frame 31 evenly distribute the water flow and wave impact forces transmitted by the first buffer plate 34, preventing localized overload damage and reducing the water flow velocity around the buffer assembly 30 to slow the settling speed of surrounding feed. Moreover, under the interference of the first buffer plate 34, the exchange of water around the buffer assembly 30 is enhanced, thus improving the light refraction effect of the water and improving the fish's ability to identify feed in the water. In addition, the flexible connecting rods 33 arranged in an array below the support rods 32 absorb the impact energy by their own deformation, weaken the transmission of the impact to the float 60, reduce the swaying of the float, and the first buffer plate 34 connected to the flexible connecting rods 33 can directly bear the impact of the water body. Together with the flexible connecting rods 33, they form a multi-layer buffer, which effectively improves the stability of the device in the fluctuating water body of marine aquaculture.

[0025] See appendix Figure 6 As shown, the first buffer plate 34 has a concave arc surface, and the concave arc surfaces of the first buffer plates 34 below adjacent support rods 32 are not oriented in the same direction. The concave arc surface structure of the first buffer plate 34 is used to distribute the impact force to different areas of the arc surface when receiving water flow and wave impact from marine aquaculture water, thereby weakening the direct impact on the buffer assembly 30. Furthermore, since the concave arc surfaces of the first buffer plates 34 below adjacent support rods 32 are not oriented in the same direction, they can simultaneously cope with water flow impact from multiple directions, preventing the device from tilting or shaking violently due to excessive unidirectional force, and further ensuring the stability of the feed box 41 and guide plate 46 above the float 60.

[0026] See appendix Figure 2 and appendix Figure 8As shown, the connecting assembly 20 includes a connecting bracket 24, on which a telescopic second hydraulic rod 23 is mounted. The telescopic end of the second hydraulic rod 23 is connected to a swing plate, the bottom of which is hinged to the connecting bracket 24. The other end of the swing plate is connected to a first hydraulic rod 22, the end of which is mounted on the buffer assembly 30. The second hydraulic rod 23 can drive the connected swing plate to swing around its hinge point with the connecting bracket 24. In conjunction with the first hydraulic rod 22 connected to the other end of the swing plate, the swing angle and amplitude can be adjusted. Thus, the end of the first hydraulic rod 21 is mounted on the buffer assembly 30, achieving a stable connection between the connecting assembly 20 and the buffer assembly 30. Furthermore, the extension and retraction of the hydraulic rod, in conjunction with the swing plate, can buffer the pulling force during the towing of the remote-controlled boat 10, reducing the impact on the buffer assembly 30 and the float 60.

[0027] See appendix Figure 2 and appendix Figure 8 As shown, the buffer assembly 30 is connected to the connecting assembly 20 via a connecting bracket 21. Specifically, the buffer frame 31 of the buffer assembly 30 is connected to the connecting bracket 24 of the connecting assembly 20 via the connecting bracket 21. This ensures a stable connection between the buffer assembly 30 and the connecting assembly 20, preventing relative displacement during device movement or water impact. When the remote-controlled boat 10 is towed by the connecting assembly 20, the traction force can be smoothly transmitted to the buffer frame 31 via the connecting bracket 24 and the first hydraulic rod 21, and then distributed by the buffer frame 31 to components such as the internal support spacer 32 of the buffer assembly 30, reducing local overload and ensuring the stable buffering effect of the buffer assembly 30 on the float 60.

[0028] See appendix Figure 1 As shown, the feed box 41 has an openable and closable cover, which facilitates the replenishment of feed into the feed box 41 and also prevents salt spray, impurities and rainwater from the marine aquaculture environment from entering the feed box 41.

[0029] Example 2: In this embodiment, see Appendix Figure 2 Appendix Figure 5 Appendix Figure 7 As shown, a rolling element 50 is provided below the material box 40. The rolling element 50 includes a first connecting rod 51 connected to the buffer frame 31 of the buffer assembly 30. There are two first connecting rods 51 arranged symmetrically. A side plate 55 is hinged to the end of the first connecting rod 51. Rotating plates 53 are arranged in an array between the side plates 55. The rotating plates 53 are connected by a rotating shaft 54. A through hole is opened on the rotating plate 53, and a slot is opened around the edge of the rotating plate 53. A strip-shaped blade 52 is engaged in the slot. The blade 52 is a straight plate or an arc-shaped plate.

[0030] The rolling element 50 is fixed by connecting the first connecting rod 51, which is symmetrically arranged, to the buffer frame 31 to prevent the rolling element 50 from shifting due to water fluctuations. The side plate 55, which is hinged to the end of the first connecting rod 51, is used to adjust the angle to adapt to the water flow changes of the marine water. The array of rotating plates 53 connected between the side plates 55 by the rotating shaft 54 ​​can rotate with the water flow or the falling force of the feed. The through holes opened on them help the feed to disperse. The straight or arc-shaped blades 52 that are engaged by the grooves on the edge of the rotating plate 53 can further guide the direction of feed diffusion, prevent local accumulation of feed, and prolong the settling time of some feed in the water after changing the sinking path. In addition, the rolling element 50 also relatively slows down the water flow velocity below the feed box 40.

[0031] Example 3: In this embodiment, the float 60 has an electrical control box and a battery for powering the electrical equipment on the upper part of the float 60. An infrared sensor is installed inside the feed tank 41 to detect the height of the feed inside, monitor the amount of feed remaining, and determine whether feed needs to be added during the return trip.

[0032] Example 4: In this embodiment, referring to the float 2, a gas tank 43 is provided on one side of the feed box 41 and communicates with its interior. This gas tank 43 is used to balance the air pressure when the feed in the feed box 41 decreases and the space inside the box increases, to prevent negative pressure from forming inside the box and causing the feed to be blocked from the bottom outlet, and to ensure that the feed flows smoothly to the guide plate 46.

[0033] It should also be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 on this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0034] The embodiments and / or implementation methods described above are merely preferred embodiments and / or implementation methods for implementing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any way. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as the technology or embodiments that are substantially the same as the present invention.

[0035] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A slow-release feeding device for freshwater fish aquaculture, comprising a buoyant float (60), a feed box (41) for feed storage mounted on top of the float (60) via a support rod (44), the feed box (41) having an outlet at the bottom and an electrically controlled valve, characterized in that, The feed box (41) has a downwardly inclined guide plate (46) at the outlet. The end of the guide plate (46) has a discharge box (42). The discharge box (42) is a box that runs vertically through the top and bottom. The upper edge of the box is connected to the end of the guide plate (46).

2. The slow-release feeding device for freshwater fish aquaculture according to claim 1, characterized in that, The lower end of the inner wall of the material box (42) is provided with a first snap-fit ​​plate (48), and a brush strip (47) is snapped onto the snap-fit ​​plate (48).

3. The slow-release feeding device for freshwater fish aquaculture according to claim 2, characterized in that, The bottom of the first snap-fit ​​plate (48) is provided with a second snap-fit ​​plate (49) at an angle to it, and a brush strip (47) is snapped onto the second snap-fit ​​plate (49).

4. The slow-release feeding device for freshwater fish aquaculture according to claim 1, characterized in that, The bottom of the guide plate (46) has a shaking motor (45), which is mounted on the float (60).

5. The slow-release feeding device for freshwater fish aquaculture according to claim 1, characterized in that, A buffer assembly (30) is provided below the float (60), and one side of the buffer assembly (30) is connected to a remotely controlled boat (10) that can move on the water surface via a connecting assembly (20) and a rope.

6. The slow-release feeding device for freshwater fish aquaculture according to claim 5, characterized in that, The buffer assembly (30) includes a buffer frame (31) with a frame structure. The buffer frame (31) is provided with a plurality of parallel support rods (32). The first buffer plate (34) is connected to the support rods (32) below by a flexible connecting rod (33) arranged in an array.

7. The slow-release feeding device for freshwater fish aquaculture according to claim 6, characterized in that, The first buffer plate (34) has a concave arc surface, and the concave arc surfaces of the first buffer plates (34) below the adjacent support rods (32) are not aligned.

8. The slow-release feeding device for freshwater fish marine aquaculture according to claim 5, characterized in that, The connecting assembly (20) includes a connecting bracket (24), on which a second hydraulic rod (23) capable of telescopic movement is provided. The telescopic end of the second hydraulic rod (23) is connected to a swing plate capable of swinging. The bottom of the swing plate is hinged to the connecting bracket (24). The other end of the swing plate is connected to a first hydraulic rod (22), and the end of the first hydraulic rod (21) is mounted on the buffer assembly (30).

9. The slow-release feeding device for freshwater fish aquaculture according to claim 5, characterized in that, The buffer assembly (30) is connected to the connecting assembly (20) via a connecting bracket (21) on its side.

10. The slow-release feeding device for freshwater fish aquaculture according to claim 1, characterized in that, The feed box (41) has an openable cover on top, and a gas cylinder (43) communicating with the inside is provided on one side of the feed box (41).

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