An auxiliary feeding device for ecological fish farming

Abstract

This invention relates to the field of aquaculture technology and discloses an auxiliary feeding device for ecological fish farming, including a frame, a hopper, a feeding mechanism, a drive component, and a feeding cylinder. The hopper is located on top of the frame, the feeding mechanism is located at the bottom outlet of the hopper, the drive component is mounted on the frame and connected to the feeding mechanism, and the feeding cylinder is fixed below the outlet of the feeding mechanism. This invention solves the problems of feed bridging and jamming in high humidity environments by setting cooperating stirring blades and a feeding screw at the bottom of the hopper, and equipping the bottom of the hopper with an independently controlled vibration motor, ensuring the stability and continuity of the feeding flow. By designing the feeding cylinder as a pitch-adjustable mechanical structure, combined with an internal guide cone and fan-shaped diffuser, it achieves precise coverage and spatial distribution control of the feed throwing path, effectively avoiding secondary water pollution caused by localized overfeeding, and improving feed utilization and the uniformity of fish feeding.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, specifically to an auxiliary feeding device for ecological fish farming. Background Technology

[0002] With the transformation and upgrading of modern aquaculture towards high density, large scale and automation, the feeding process, as one of the most basic and frequent tasks in aquaculture, has its efficiency and accuracy directly related to the aquaculture benefits and the maintenance of the aquatic ecological environment.

[0003] Currently, most common feeding equipment on the market adopts a simple mechanical feeding structure. These traditional devices face multiple technical bottlenecks in actual operation: First, the hopper structure of most feeding devices is simple. When facing various extruded or powdered feeds in humid environments, the materials are prone to caking and compaction due to moisture absorption, which can lead to bridging or voids above the discharge port, causing interruptions in feeding. Moreover, existing mixing devices often fail to balance mixing uniformity and anti-clogging effects, resulting in intermittent and unstable feeding processes. Second, the feeding method of traditional feeding equipment is usually just vertical gravity drop, which severely limits the distribution range and makes it difficult to cover a wide aquaculture area. Furthermore, the feeding angle is often fixed and cannot be flexibly adjusted according to water level, fish distribution, or the specific geometry of the aquaculture pond. This leads to excessive local feed accumulation causing eutrophication, while surrounding areas face a contradiction of insufficient feed supply. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an auxiliary feeding device for ecological fish farming, which can ensure the absolute stability and continuity of the feeding flow rate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary feeding device for ecological fish farming, comprising: a frame, a hopper, a feeding mechanism, a drive assembly, and a feeding cylinder; The hopper is located at the top of the frame, the feeding mechanism is located at the bottom outlet of the hopper, the drive assembly is installed on the frame and is connected to the feeding mechanism for transmission, and the feeding cylinder is fixed below the outlet end of the feeding mechanism.

[0006] Preferably, the feeding mechanism includes a rotating shaft, stirring blades, and a feeding screw; the rotating shaft horizontally passes through the hopper and is rotatably supported by a bearing seat located on the side wall of the hopper; the stirring blades are arranged in a spiral along the axial direction of the rotating shaft and fixed in the middle of the rotating shaft; the feeding screw is fixedly sleeved on the rotating shaft and located inside the bottom discharge port of the hopper; the output shaft of the drive assembly is coaxially connected to one end of the rotating shaft through a coupling.

[0007] Preferably, the top of the frame is provided with two parallel guide rods, and the outer wall of the hopper is provided with a sliding sleeve that slides with the guide rods, so that the hopper can make vertical reciprocating motion along the guide rods. A vibration motor is installed at the center of the outer side of the bottom wall of the hopper.

[0008] Preferably, the drive assembly includes a drive motor, a reducer, and a belt drive assembly; the drive motor is horizontally mounted on one side column of the frame via an L-shaped bracket, the reducer is fixed to the top crossbeam of the frame by bolts, and the belt drive assembly includes a synchronous pulley and a synchronous belt, which are respectively sleeved on one end of the output shaft and the rotating shaft of the reducer.

[0009] Preferably, the feeding cylinder has a frustum-shaped structure, with a conical guide cone coaxially arranged on its internal central axis. The diameter of the bottom surface of the guide cone is larger than the diameter of the top surface, and it is fixed to the inner wall of the feeding cylinder by three radial connecting rods arranged at 120-degree intervals in the circumferential direction. A fan-shaped diffuser plate extending radially outward is connected around the lower port of the feeding cylinder.

[0010] Preferably, the outer wall of the feeding cylinder is fitted with a fixing ring in the form of a clamp. The fixing ring is hinged to the frame through an adjustable telescopic connecting rod. The telescopic connecting rod includes a threaded sleeve and a threaded rod body. By rotating the rod body, the overall length of the telescopic connecting rod is changed, thereby driving the feeding cylinder to swing and adjust around the axis of the fixing ring.

[0011] Preferably, vertically arranged support legs are welded to the four corners of the bottom of the frame, counterweights are installed on the support legs, and cross braces are welded between adjacent support legs.

[0012] Preferably, a hollow float is fitted on the lower part of the support leg, and an air pressure regulating valve is embedded in the side wall of the float. A sealed control box is installed on the side column of the frame. The control box integrates a frequency converter and control circuit, and is electrically connected to the vibration motor and drive motor respectively through wires.

[0013] Preferably, the outer edge of the spiral blades of the feeding screw is provided with a wear-resistant washer that slides in contact with the inner wall of the hopper, and two symmetrically arranged limiting baffles are provided at the bottom outlet of the hopper. The limiting baffles are provided with waist-shaped grooves and are fixedly connected to the side wall of the hopper by adjusting bolts passing through the waist-shaped grooves, so as to change the flow cross-sectional area of ​​the outlet.

[0014] Preferably, the top of the frame is provided with a protective cover that covers the hopper, and a rubber sealing ring is embedded at the connection between the edge of the protective cover and the frame. One side of the frame is provided with an observation window made of transparent plexiglass, and the observation window is sealed and fixed to the side wall of the frame by the surrounding pressure strips.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This type of auxiliary feeding equipment for ecological fish farming effectively solves the problems of feed bridging and jamming in high-humidity environments by setting synergistic mixing blades and feeding screws at the bottom of the hopper, and equipping the bottom of the hopper with an independently controlled vibration motor. This addresses the issues of material bridging and jamming through both physical fluidization and forced conveying, ensuring the absolute stability and continuity of the feeding flow. By designing the feeding cylinder as a pitch-adjustable mechanical structure, combined with internal guide cones and fan-shaped diffusers, precise coverage and spatial distribution control of the feed throwing path are achieved, effectively avoiding secondary water pollution caused by localized overfeeding and significantly improving feed utilization and the uniformity of fish feeding. By integrating floats with air pressure regulating valves and counterweights at the bottom of the support legs, combined with a high-strength cross brace reinforcement design, a support system with excellent dynamic balance characteristics on the water surface is constructed, ensuring not only... During operation, the equipment effectively resists lateral torque from wave scouring and maintains absolute vertical stability even in complex aquaculture environments, significantly reducing wear and metal fatigue in the mechanical structure. Furthermore, the modular assembly of protective covers and sealing rings, coupled with a transparent plexiglass observation window, greatly enhances the convenience of daily maintenance and the visualization and monitoring capabilities of the system while ensuring a tightly sealed internal environment. The belt drive assembly and modularly installed drive motor design not only simplify maintenance and repair processes but also completely eliminates lubricant contamination of the water by the transmission system. The integrated automated control logic of the entire equipment can adjust operating parameters in real time according to feed characteristics and the aquaculture environment, thus achieving a compact, stable, highly adaptable, and highly compliant automated feeding system that meets the requirements of modern ecological aquaculture. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a three-dimensional structural diagram of the entire invention from another angle; Figure 3 This is a top view of the entire invention; Figure 4 This is a side view of the entire invention; Figure 5 This is a three-dimensional structural diagram of the limiting baffle of the present invention; Figure 6 This is a cross-sectional three-dimensional structural diagram of the entire invention; Figure 7 This is a three-dimensional structural diagram of the feeding cylinder of the present invention; Figure 8 This is a cross-sectional three-dimensional structural diagram of the feeding cylinder of the present invention; Figure 9 for Figure 5Enlarged view of point A above.

[0017] In the diagram: 1. Frame; 2. Hopper; 3. Feeding mechanism; 4. Drive assembly; 5. Feeding cylinder; 6. Rotating shaft; 7. Mixing blades; 8. Feeding screw; 9. Bearing seat; 10. Guide rod; 11. Sliding sleeve; 12. Vibration motor; 13. Drive motor; 14. Reducer; 15. Belt drive assembly; 16. Support; 17. Guide cone; 18. Connecting rod; 19. Fan-shaped diffuser plate; 20. Fixing ring; 21. Telescopic connecting rod; 22. Support leg; 23. Counterweight; 24. Cross brace; 25. Float; 26. Air pressure regulating valve; 27. Control box; 28. Wear-resistant washer; 29. ​​Limit baffle; 30. Adjusting bolt; 31. Protective cover; 32. Sealing ring; 33. Observation window. Detailed Implementation

[0018] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0019] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0020] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure 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 this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0022] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0023] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0025] Please see Figures 1 to 9 This invention provides an auxiliary feeding device for ecological fish farming. Through precise control of material flow and a structured design adapted to the environment, it overcomes the technical barriers of traditional feeding devices, such as easy material jamming in high-humidity aquaculture environments, limited material distribution range, and poor installation stability. To illustrate this invention in detail, the following description, in conjunction with the accompanying drawings and specific structural components, provides a comprehensive explanation of the technical solution.

[0026] The frame 1 of this equipment uses 304 stainless steel profiles as the main frame, welded together using argon arc welding to form a high-strength space truss structure. The cross-section of the frame 1 is designed as a rectangular hollow tube, ensuring lightweight construction while possessing extremely high torsional rigidity. Support legs 22 are vertically welded to the four corners of the bottom of the frame 1. These support legs 22 are not simple rigid supports, but rather employ a multi-stage sleeve structure. Each support leg 22 is end-equipped with a heavy-duty counterweight 23, which is cast iron and coated with an anti-corrosion coating. By lowering the center of gravity of the entire equipment, the anti-overturning moment of the equipment under dynamic stress on the water surface is significantly improved.

[0027] To cope with wave dynamic loads in the aquaculture environment, adjacent support legs 22 are reinforced at multiple points by cross braces 24. This connection structure not only absorbs the resonant energy generated by the vibration motor 12 during equipment operation, but also distributes stress evenly to the floats 25 at the four corners through the cross braces 24 when encountering water flow impact, effectively preventing metal fatigue cracks in the frame 1.

[0028] As the core of the entire equipment for material storage, the hopper 2 needs to ensure that it can withstand the weight of materials for a long time without buckling or deformation. A protective cover 31 is installed on the edge of the frame 1 at the upper opening of the hopper 2. The contact surface between the protective cover 31 and the frame 1 is fitted with an EPDM sealing ring 32. This sealing ring 32 has excellent resistance to compression set, ensuring that it can maintain a sealed state even under extreme outdoor temperature differences, preventing rainwater and flying insects from entering the hopper 2.

[0029] The longitudinal position adjustment of hopper 2 is achieved through guide rod 10, which is a precision-ground optical shaft with a chrome-plated surface to prevent rust. The sliding sleeves 11 symmetrically arranged on the outer wall of hopper 2 are internally inlaid with self-lubricating nylon bushings. These bushings not only reduce the coefficient of friction during height adjustment of hopper 2 but also provide a certain degree of vibration damping. The bottom of hopper 2 is equipped with a core feeding mechanism 3. The rotating shaft 6 inside this mechanism is fixed by a pair of heavy-duty bearing seats 9. The bearing seats 9 integrate double-sealed lip oil seals, which can completely prevent moisture from entering the bearing raceway.

[0030] The stirring blades 7 are fixed to the middle of the rotating shaft 6. When the shaft 6 rotates, the radial thrust generated by the blades effectively breaks up the bridging phenomenon formed between feed particles. The feeding screw 8 is located at the bottom of the discharge port, and its spiral angle is preset to 15 degrees according to the feed particle density, ensuring extremely high linearity of the discharge flow rate when the rotation speed of the shaft 6 is constant. It is worth noting that wear-resistant washers 28 are embedded in the outer circumference of the blades of the feeding screw 8. These washers are made of high molecular weight polyethylene and, through their own elastic deformation, maintain zero-gap contact with the inner wall of the discharge port of the hopper 2, thereby achieving a sealing effect similar to that of a scraper pump, greatly reducing feed residue and breakage rate. The limiting baffle 29 at the discharge port is connected to the waist-shaped hole on the hopper wall through the adjusting bolt 30. The operator can adjust the discharge width to the millimeter level according to the particle diameter requirements of different growth stages of fish fry. By changing the cross-sectional area of ​​the flow, multiple coupling control of flow rate and particle size is achieved.

[0031] The drive assembly 4 adopts a modular design. The drive motor 13 is a wide-voltage induction motor with high starting torque characteristics. It is horizontally mounted via an L-shaped bracket 16, reducing the installation space above the equipment and lowering the overall center of gravity. Power transmission uses a belt drive assembly 15. Unlike traditional chain drives, belt drives do not require frequent lubrication, avoiding oil pollution of the aquaculture water. The reducer 14 acts as a power amplifier and is a two-stage cycloidal pinwheel reducer 14. Its output shaft is connected to the rotating shaft 6 via a flexible coupling. This soft connection effectively absorbs the impact force at the moment of motor start-up, protecting the feeding screw 8 from overload damage. To monitor the motor's operating status, the control box 27 integrates a current detection module. When the feeding screw 8 is jammed by a foreign object, causing a surge in current, the control box 27 will automatically cut off power and issue a fault alarm.

[0032] The feeding cylinder 5 is more than just a chute; it achieves complex feed distribution through a precise mechanical structure. The surface of the internal guide cone 17 is ultra-precision machined to guide the feed flow into a ring-shaped diffusion effect, rather than simply pouring downwards. The connecting rod 18, made of stainless steel round steel, not only supports the guide cone 17 but also acts as a flow-breaking rib to prevent material accumulation inside the cylinder. The fan-shaped diffuser plate 19 at the lower end of the feeding cylinder 5 employs a multi-segment bending process to ensure that the coverage area of ​​the feed upon landing reaches the optimal radius of the fishpond feeding area.

[0033] To accommodate fish feeding at different depths, the adjustable pitch angle of the feeding cylinder 5 is a major innovation of this equipment. The feeding cylinder 5 is hinged to the frame 1 via a fixing ring 20. One end of the telescopic connecting rod 21 is fixed to the column of the frame 1, and the other end is hinged to the fixing ring 20. The telescopic connecting rod 21 is designed with a self-locking thread structure, allowing the user to achieve stepless adjustment of the angle of the feeding cylinder 5 by rotating the sleeve. After locking, it will not shift even under motor vibration.

[0034] In terms of water surface stability, the floats 25 at the bottom of the support legs 22 play an irreplaceable role. The floats 25 are symmetrically distributed and have internal wave-damping baffles that effectively buffer the impact of surface waves on the equipment. The air pressure regulating valve 26 is connected to the air chamber inside the floats 25, allowing for precise adjustment of the equipment's draft through external inflation or deflation. When feeding demand increases, the counterweight pressure of the floats 25 can be appropriately reduced, and by adjusting the relative height of the frame 1 to the water surface, the distance between the feeding port and the water surface is always maintained at the optimal spreading height. The observation window 33, located on the side wall of the frame 1, is made of high-transparency plexiglass and is sealed and fixed to the side wall of the frame 1 by surrounding metal strips. Its main purpose is to provide operators with a visible internal space without needing to open the protective cover 31, allowing them to directly observe the remaining feed volume and material flow in the hopper 2. This enables real-time monitoring of the feeding progress and replenishment decisions, effectively preventing moisture buildup inside the hopper 2 or the entry of external debris due to frequent opening of the cover.

[0035] The operation of this equipment follows a strict mechanical logic sequence. First, the size of the primary discharge port is set according to the feed specifications by adjusting the limit baffle 29. At the same time, the tilt angle of the feeding cylinder 5 is set by rotating the telescopic connecting rod 21 to ensure that the central area of ​​the feed spread accurately falls into the aquaculture water.

[0036] During operation, the control box 27 issues a command to first activate the vibration motor 12. At this time, the hopper 2 generates high-frequency, small-amplitude vibrations. This vibration is transmitted to the feed inside the hopper 2 through the wall of the hopper 2. By utilizing the change in the internal friction angle of the material, the feed in the hopper 2 is made to fluidize, completely eliminating the arching phenomenon caused by feed moisture or particle friction. Subsequently, the drive motor 13 starts smoothly under the drive of the frequency converter. The power is transmitted to the reducer 14 through the belt drive assembly 15, and the rotating shaft 6 begins to rotate at the set speed.

[0037] At this time, the stirring blades 7 continuously horizontally displace and agitate the material, keeping it in a uniformly loose state. The feeding screw 8 forcibly pushes the material towards the discharge port. Because the outer edge of the feeding screw 8 is fitted with wear-resistant gaskets 28, it forms a tight seal with the inner wall of the hopper 2, ensuring a constant feeding speed and preventing backflow. After leaving the screw, the feed enters the feeding cylinder 5. After being blocked and diverted by the guide cone 17, the material no longer falls in a cluster but disperses. Finally, the material touches the fan-shaped diffuser plate 19 and, under momentum exchange, flies out in a fan shape towards the predetermined area, achieving precise and uniform feeding. Throughout the cycle, the float 25 maintains a constant draft through the air pressure regulating valve 26, ensuring absolute stability of the mechanical structure during operation. The above process, through the programmed logic of the control box 27, achieves automated closed-loop management from feeding to stirring to pushing, guiding, and diffusion.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An auxiliary feeding device for ecological fish farming, characterized in that, include: The frame (1), hopper (2), feeding mechanism (3), drive assembly (4) and feeding cylinder (5); The hopper (2) is located on the top of the frame (1), the feeding mechanism (3) is located at the bottom outlet of the hopper (2), the drive assembly (4) is installed on the frame (1) and connected to the feeding mechanism (3) in a transmission manner, and the feeding cylinder (5) is fixed below the outlet end of the feeding mechanism (3).

2. The auxiliary feeding device for ecological fish farming according to claim 1, characterized in that, The feeding mechanism (3) includes a rotating shaft (6), stirring blades (7) and a feeding screw (8); the rotating shaft (6) passes horizontally through the hopper (2) and is rotated and supported by a bearing seat (9) located on the side wall of the hopper (2); the stirring blades (7) are arranged in a spiral along the axial direction of the rotating shaft (6) and fixed in the middle of the rotating shaft (6); the feeding screw (8) is fixedly sleeved on the rotating shaft (6) and located inside the bottom discharge port of the hopper (2); the output shaft of the drive assembly (4) is coaxially connected to one end of the rotating shaft (6) through a coupling.

3. The auxiliary feeding device for ecological fish farming according to claim 2, characterized in that, The top of the frame (1) is provided with two parallel guide rods (10). The outer wall of the hopper (2) is provided with a sliding sleeve (11) that slides with the guide rods (10), so that the hopper (2) can move vertically back and forth along the guide rods (10). A vibration motor (12) is installed at the center of the outer side of the bottom wall of the hopper (2).

4. The auxiliary feeding device for ecological fish farming according to claim 1, characterized in that, The drive assembly (4) includes a drive motor (13), a reducer (14), and a belt drive assembly (15). The drive motor (13) is horizontally mounted on one side column of the frame (1) via an L-shaped bracket (16). The reducer (14) is fixed to the top beam of the frame (1) by bolts. The belt drive assembly (15) includes a synchronous pulley and a synchronous belt, which are respectively fitted onto one end of the output shaft and the rotating shaft (6) of the reducer (14).

5. The auxiliary feeding device for ecological fish farming according to claim 1, characterized in that, The feeding cylinder (5) has a frustum-shaped structure, and a conical guide cone (17) is coaxially arranged on its internal central axis. The bottom diameter of the guide cone (17) is larger than the top diameter, and it is fixed to the inner wall of the feeding cylinder (5) by three radial connecting rods (18) arranged at 120 degrees apart in the circumferential direction. A fan-shaped diffuser plate (19) extending radially outward is connected around the lower port of the feeding cylinder (5).

6. The auxiliary feeding device for ecological fish farming according to claim 5, characterized in that, The outer wall of the feeding cylinder (5) is fitted with a fixing ring (20) in the form of a clamp. The fixing ring (20) is hinged to the frame (1) through an adjustable telescopic connecting rod (21). The telescopic connecting rod (21) includes a threaded sleeve and a threaded rod body. By rotating the rod body, the overall length of the telescopic connecting rod (21) is changed, thereby driving the feeding cylinder (5) to swing around the axis of the fixing ring (20) for adjustment.

7. The auxiliary feeding device for ecological fish farming according to claim 1, characterized in that, The bottom four corners of the frame (1) are welded with vertically arranged support legs (22), and counterweights (23) are installed on the support legs (22). A cross brace (24) is welded between two adjacent support legs (22).

8. The auxiliary feeding device for ecological fish farming according to claim 7, characterized in that, The lower part of the support leg (22) is fitted with a hollow float (25), and the side wall of the float (25) is embedded with a pressure regulating valve (26). A sealed control box (27) is installed on the side column of the frame (1). The control box (27) integrates a frequency converter and control circuit, and is electrically connected to the vibration motor (12) and the drive motor (13) respectively through wires.

9. The auxiliary feeding device for ecological fish farming according to claim 2, characterized in that, The outer edge of the spiral blades of the feeding screw (8) is provided with a wear-resistant washer (28) that slides in contact with the inner wall of the hopper (2). Two symmetrically arranged limiting baffles (29) are provided at the bottom outlet of the hopper (2). The limiting baffles (29) are provided with waist-shaped grooves and are fixedly connected to the side wall of the hopper (2) by adjusting bolts (30) passing through the waist-shaped grooves, so as to change the flow cross-sectional area of ​​the outlet.

10. The auxiliary feeding device for ecological fish farming according to claim 1, characterized in that, The top of the frame (1) is provided with a protective cover (31) that covers the hopper (2). A rubber sealing ring (32) is embedded at the connection between the edge of the protective cover (31) and the frame (1). A viewing window (33) made of transparent organic glass is provided on one side of the frame (1). The viewing window (33) is sealed and fixed to the side wall of the frame (1) by the surrounding pressure strips.

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