Feeder for fish farming

Abstract

A feeder for fish farming includes a mounting frame, a storage box, a feeding structure and a feeding structure. A first feeding port is provided at the bottom of the storage box. A first feeding port is provided at the top of the feeding structure. A second feeding port and a second feeding port are provided at the upper and lower ends of the feeding structure, respectively. The feeding structure includes an outer cylinder and an inner rotating cylinder. A through slot is provided on the outer cylinder. A bracket is fixed on the left outer wall of the outer cylinder. A first motor is installed on the bracket. A rotating shaft is fixed on the output shaft of the first motor. A quantitative groove is provided on the outer wall of the inner rotating cylinder. A lifting plate and a positive and negative threaded rod are arranged in the quantitative groove. A rotating rod is fixed to the right end of the positive and negative threaded rod. A knob is fixed to the right end of the rotating rod. Nut seats are sleeved on the outside of the positive and negative threaded parts of the positive and negative threaded rods. Connecting rods are hinged between the lifting plate and the two nut seats. The utility model can adjust the amount of feed thrown each time according to the feeding needs of fish.

Description

Technical Field

[0001] The utility model relates to the technical field of aquaculture equipment, in particular to a feeder for fish farming. Background Art

[0002] The breeding, rearing and stocking of fish. Fish farming, also known as aquaculture, fish farming and pisciculture, is important in maintaining food supplies, for sport fishing and for expanding fishing areas.

[0003] However, the existing fish feeding needs to be done manually, which results in uneven feeding, causing fish to gather together to fight for food, and requires a lot of energy and time, which is costly. Therefore, many automatic feeding devices have appeared on the market.

[0004] For example, a Chinese patent with authorization announcement number CN215836571U discloses a timed and fixed-point feeding table for fish farming, including a base plate, a feeding box and a storage box. A motor is fixedly installed on the top of the base plate, and a support frame is fixedly connected to the outer periphery of the motor at the top of the base plate. The output end of the motor is connected to a rotating shaft through a reducer, and the rotating shaft passes through the top of the support frame. The top of the rotating shaft is fixedly connected to the feeding box, a processor is installed on the left side of the feeding box, a feed outlet is connected to the right side of the feeding box, a storage box is fixedly connected to the top of the feeding box, a support seat is fixedly connected to the middle position of the top of the storage box, and a motor two is fixedly installed on the top of the support seat. A pressure sensor and motor one are provided. When the push block moves down and hits the pressure sensor, the pressure sensor will transmit a signal to the processor, and the processor will control motor one to start, thereby rotating the feeding box, thereby increasing the feeding range.

[0005] However, the amount of food that fish need to eat is different at different stages, and the amount of feed in the utility model is fixed each time the feed is input, and it is impossible to make corresponding adjustments according to the feeding needs of the fish.

[0006] Therefore, the utility model proposes a technical solution to solve the problem of adjusting the input amount of feed according to the feeding needs of fish. Utility Model Content

[0007] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a feeder for fish farming, aiming to achieve the technical effect of being able to adjust the amount of feed thrown each time according to the feeding needs of fish.

[0008] A feeder for fish farming, comprising a mounting frame, a storage box, a feeding structure and a feeding structure, wherein the storage box, the feeding structure and the feeding structure are all mounted on the top of the mounting frame and are arranged in sequence from top to bottom, the storage box is used to store feed, and a first discharge port is provided at the bottom thereof, the feeding structure is used to scatter feed, and a first feed port is provided at the top thereof, the feeding structure is used to transport feed in the storage box to the feeding structure, a second feed port corresponding to the first discharge port is provided at the top of the feeding structure, and a second discharge port corresponding to the first feed port is provided at the bottom of the feeding structure;

[0009] The material conveying structure comprises an outer cylinder and an inner rotating cylinder;

[0010] The outer cylinder is provided with a through slot, which is cylindrical in shape and passes through the outer cylinder from left to right. The second feed port is provided on the top slot wall of the through slot and extends upward to pass through the outer cylinder. The second discharge port is provided on the bottom slot wall of the through slot and extends downward to pass through the outer cylinder and corresponds to the second feed port. A bracket is fixed on the left outer side wall of the outer cylinder, a first motor is mounted on the bracket, a rotating shaft is fixed on the output shaft of the first motor, and the rotating shaft passes through the bracket and corresponds to the center position of the through slot.

[0011] The inner rotating column is located in the through groove in a matching connection manner, and is rotatably connected to the through groove by a bearing, the left end center position of the inner rotating column is fixedly connected to the rotating shaft, a quantitative groove corresponding to the second feed port is opened on the outer wall of the inner rotating column, a lifting plate and positive and negative screw rods are arranged in the quantitative groove, the positive and negative screw rods extend horizontally to the left and right and are rotatably connected to the quantitative groove by bearings, a rotating rod is fixed to the right end of the positive and negative screw rods, the right end of the rotating rod passes through the inner rotating column and is fixed with a knob, the positive and negative parts of the positive and negative screw rods are both threadedly sleeved with nut seats, the two nut seats both move left and right along the groove wall of the quantitative groove, the lifting plate moves up and down along the groove wall of the quantitative groove, and a connecting rod is hinged between the bottom end of the lifting plate and the top ends of the two nut seats.

[0012] By adopting the above technical solution, the feed is stored in the storage box, and the feed will fall into the quantitative groove through the first discharge port and the second feed port, and fill the quantitative groove. When feeding is needed, the first motor is started, and the output shaft of the first motor rotates to drive the rotating shaft to rotate. The rotating shaft drives the inner rotating column to rotate 180° in the through groove. At this time, the opening of the quantitative groove faces downward and corresponds to the second discharge port. The feed in the quantitative groove falls into the feeding structure through the second discharge port and the first feed port. The feeding structure can be automatically thrown out by restarting it. While the feeding structure throws the feed, the inner rotating column is rotated 180° again by the first motor, the opening of the quantitative groove faces upward again and corresponds to the second feed port, and the quantitative groove is filled with a certain amount of feed again. When the amount of feed filled in the quantitative groove needs to be adjusted. The rotating rod is rotated by the knob. The rotating rod drives the positive and negative screws to rotate. The positive and negative screws drive the two nut seats to move toward or in the opposite direction along the quantitative groove. When the two nut seats move toward each other, the two connecting rods rotate upward, thereby driving the lifting plate to move upward along the quantitative groove, and the amount of feed that can be filled in the quantitative groove decreases. When the two nut seats move in the opposite direction, the two connecting rods rotate downward, thereby driving the lifting plate to move downward along the quantitative groove, and the amount of feed that can be filled in the quantitative groove increases. The utility model can adjust the amount of feed thrown each time according to the feeding needs of fish.

[0013] The utility model is further configured as follows: an annular scale line for displaying the amount of feed that can be accommodated inside the quantitative groove is engraved on the right side outer side wall of the inner rotating column, and an indicating line corresponding to the annular scale line is engraved on the knob.

[0014] By adopting the above technical solution, the staff can intuitively judge the amount of feed filled in the quantitative tank by observing the index on the annular scale line corresponding to the indicator line.

[0015] The utility model is further configured as follows: the material storage box is a cylindrical structure with an open top, the material storage box is fixed to the top of the outer cylinder, and the first discharge port is opened at the bottom of the material storage box and communicates with the interior of the material storage box.

[0016] By adopting the above technical solution, the feed is added into the storage box through the top opening of the storage box, and then enters the quantitative slot through the first discharge port and the second feed port.

[0017] The utility model is further configured as follows: a window communicating with the interior of the storage box is provided on the right side wall of the storage box, and a cover plate made of a transparent material is covered on the window.

[0018] By adopting the above technical solution, the staff can clearly observe the remaining amount of feed in the storage box through the cover plate on the window, so that the staff can replenish the feed in the storage box in time.

[0019] The utility model is further configured as follows: the feeding structure includes a disc, a throwing cylinder, a second motor, a brake, a shaft, a fixed pulley, a pull rope, a spring, a first fixed plate and a second fixed plate; the disc is fixed between the top end of the mounting frame and the bottom end of the outer cylinder; a fan-shaped groove is provided on the front side of the disc; a first feed port is provided at the top end of the disc and communicates with the fan-shaped groove; the first fixed plate and the second fixed plate are both fixed to the top end of the disc and are symmetrically arranged; the shaft is rotatably connected between the first fixed plate and the second fixed plate through a bearing; the second motor is installed on the first fixed plate to drive the shaft to rotate; the brake is installed on the second fixed plate to lock the shaft; The throwing barrel is a cylindrical structure with an opening at the front end. The throwing barrel is located in the fan-shaped groove, and the rear end of the throwing barrel is rotatably connected between the upper and lower groove walls of the fan-shaped groove through a pin shaft. The upper and lower outer side walls of the throwing barrel are respectively fitted with the upper and lower groove walls of the fan-shaped groove. The top of the throwing barrel is provided with a feeding port connected to the interior thereof, and the feeding port corresponds to the first feeding port. The fixed pulley is installed inside the fan-shaped groove and is located on the left side of the throwing barrel. The spring is connected between the right outer side wall of the throwing barrel and the right side groove wall of the fan-shaped groove. One end of the pull rope is connected to the left outer side wall of the throwing barrel, and the other end of the pull rope bypasses the fixed pulley and passes through the disc upward and is bound and wrapped around the shaft.

[0020] By adopting the above technical solution, the second motor is started, and the output shaft of the second motor rotates to drive the shaft to rotate. The pull rope is continuously wound around the shaft, and the other end of the pull rope changes the direction of force through the fixed pulley, thereby pulling the throwing barrel to the left. The throwing barrel rotates to the left around the pin. The spring is stretched to form a rebound force to the right. When the left outer wall of the throwing barrel contacts the fixed pulley, the shaft is locked by the brake. At this time, the feed inlet corresponds to the first feed inlet. After the feed passes through the second discharge port and the first feed inlet, it falls into the throwing barrel through the feed inlet. Then the brake releases the shaft, and under the action of the rebound force of the spring, the throwing barrel automatically rotates to the right quickly, and the centrifugal force formed by the rotation of the throwing barrel throws the feed out of the throwing barrel. And the right rotation of the throwing barrel will pull the pull rope, which will unfold from the shaft and drive the shaft to rotate and reset. When the feed is thrown, the second motor is started again to make the feed inlet on the throwing barrel correspond to the first feed inlet again.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] A feeder for fish farming, when the lifting plate moves upward along the quantitative groove, the amount of feed that can be filled in the quantitative groove decreases. When the lifting plate moves downward along the quantitative groove, the amount of feed that can be filled in the quantitative groove increases. The utility model can adjust the amount of feed thrown each time according to the feeding needs of fish. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a fish breeding feeder of the utility model;

[0024] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0025] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0026] Figure 4 This is a cross-sectional view of a feeder for fish farming according to the utility model in the main viewing direction;

[0027] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0028] Figure 6 The utility model is a top view of a feeding structure of a feeder for fish breeding.

[0029] 1. The cam is provided with a plurality of movable parts, each of which is provided with a plurality of movable parts, and each of which is provided with a plurality of movable parts. The movable parts are provided with a plurality of movable parts. The movable parts are provided with a plurality of movable parts. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] A feeding device for fish farming, such as Figure 1-Figure 6 As shown, it includes a mounting frame 1, a storage box 2, a feeding structure and a feeding structure. The storage box 2, the feeding structure and the feeding structure are all installed on the top of the mounting frame 1 and are arranged in sequence from top to bottom. The storage box 2 is used to store feed. The feeding structure is used to throw feed. The feeding structure is used to transport the feed in the storage box 2 to the feeding structure.

[0032] The feeding structure includes a disc 3, a throwing cylinder 4, a second motor 5, a brake 6, a shaft 7, a fixed pulley 8, a pull rope 9, a spring 10, a first fixed plate 11 and a second fixed plate 12.

[0033] The disc 3 is fixed to the top of the mounting frame 1. A fan-shaped groove 13 is provided on the front side of the disc 3. A first feed port 14 communicating with the fan-shaped groove 13 is provided at the top of the disc 3. The first fixed plate 11 and the second fixed plate 12 are both fixed to the top of the disc 3 and are arranged symmetrically. The shaft 7 is rotatably connected between the first fixed plate 11 and the second fixed plate 12 through a bearing. The second motor 5 is installed on the first fixed plate 11 to drive the shaft 7 to rotate. The brake 6 is installed on the second fixed plate 12 to lock the shaft 7. The throwing barrel 4 is a cylindrical structure with an opening at the front end. The throwing barrel 4 is located in the fan-shaped groove 13, and its rear end is rotatably connected between the upper and lower groove walls of the fan-shaped groove 13 through a pin shaft. The upper and lower outer side walls of the throwing barrel 4 are respectively fitted with the upper and lower groove walls of the fan-shaped groove 13. The top of the throwing barrel 4 is provided with an inlet 15 communicating with the inside thereof and corresponding to the first feed port 14. The fixed pulley 8 is installed inside the fan-shaped groove 13 and is located on the left side of the throwing tube 4. The spring 10 is connected between the right side outer wall of the throwing tube 4 and the right side groove wall of the fan-shaped groove 13. One end of the pull rope 9 is connected to the left side outer wall of the throwing tube 4. The other end of the pull rope 9 bypasses the fixed pulley 8 and passes through the disc 3 upward and is bound and wound around the shaft 7. In this embodiment, a threading ring located between the fixed pulley 8 and the throwing tube 4 can also be installed in the fan-shaped groove 13. After the pull rope 9 passes through the threading ring, it bypasses the fixed pulley 8, which can prevent the pull rope 9 from deviating and falling off from the fixed pulley 8.

[0034] The material conveying structure includes an outer cylinder 16 and an inner rotating cylinder 17 .

[0035] The outer cylinder 16 is fixed to the top of the disc 3. A through slot 18 is provided on the outer cylinder 16. The through slot 18 is cylindrical in shape and passes through the outer cylinder 16 from left to right. A second feed port 19 is provided on the top slot wall of the through slot 18. The second feed port 19 extends upward and passes through the outer cylinder 16. A second discharge port 20 is provided on the bottom slot wall of the through slot 18. The second discharge port 20 extends downward and passes through the outer cylinder 16 and corresponds to the first feed port 14. The second discharge port 20 and the second feed port 19 also correspond to each other. A bracket 21 is fixed on the left outer side wall of the outer cylinder 16. A first motor 22 is mounted on the bracket 21. A rotating shaft 23 is fixed on the output shaft of the first motor 22. The rotating shaft 23 passes through the bracket 21 and corresponds to the center position of the through slot 18.

[0036] The inner rotating column 17 is located in the through groove 18 in a matching connection manner, and is rotatably connected to the through groove 18 through a bearing. The left end center position of the inner rotating column 17 is fixedly connected to the rotating shaft 23. The right end of the inner rotating column 17 is engraved with an annular scale line 24 for displaying the amount of feed that can be accommodated inside the quantitative groove 25. A quantitative groove 25 corresponding to the second feed inlet 19 is provided on the outer side wall of the inner rotating column 17. A lifting plate 26 and a positive and negative threaded rod 27 are arranged in the quantitative groove 25. The positive and negative threaded rod 27 extends horizontally to the left and right and is rotatably connected to the quantitative groove 25 through a bearing. A rotating rod 28 is fixed to the right end of the positive and negative threaded rod 27. The right end of the rotating rod 28 passes through the inner rotating column 17 and is fixed with a knob 29. The knob 29 is engraved with an indicator line 30 corresponding to the annular scale line 24. The outer part of the positive and negative threaded parts of the positive and negative threaded rod 27 are both sleeved with a nut seat 31 in a threaded connection manner. The two nut seats 31 both move left and right along the groove wall of the quantitative groove 25. The lifting plate 26 moves up and down along the groove wall of the quantitative groove 25. A connecting rod 32 is hinged between the bottom end of the lifting plate 26 and the top ends of the two nut seats 31.

[0037] The storage box 2 is fixed to the top of the outer cylinder 16. The storage box 2 is a cylindrical structure with an open top. The bottom of the storage box 2 is provided with a first discharge port 33 communicating with the interior thereof. The first discharge port 33 corresponds to the second feed port 19. A window communicating with the interior thereof is provided on the right side wall of the storage box 2. The window is covered with a cover plate 34 made of a transparent material. In this embodiment, a transparent acrylic material can be used.

[0038] Working principle:

[0039] Before adding feed into the storage box 2, the opening of the quantitative groove 25 faces upward and corresponds to the second feed inlet 19. The pull rope 9 is wound around the shaft 7, the spring 10 is in a stretched state, and the feed inlet 15 corresponds to the first feed inlet 14. The brake 6 locks the shaft 7.

[0040] Feed is added into the storage box 2 through the top opening of the storage box 2, so that the feed is stored in the storage box 2. The feed in the storage box 2 will fall into the quantitative groove 25 through the first discharge port 33 and the second feed port 19, and fill the quantitative groove 25. The amount of feed filled in the quantitative groove 25 each time is fixed, so quantitative feeding can be achieved.

[0041] When feeding is required, the first motor 22 is started, and the output shaft of the first motor 22 rotates to drive the rotating shaft 23 to rotate. The rotating shaft 23 drives the inner rotating column 17 to rotate 180 degrees in the through groove 18. At this time, the opening of the quantitative groove 25 faces downward and corresponds to the second discharge port 20. The feed in the quantitative groove 25 falls into the throwing cylinder 4 through the second discharge port 20, the first feed port 14 and the feed inlet 15.

[0042] Then the brake 6 releases the shaft 7, and under the action of the rebound force of the spring 10, the throwing cylinder 4 automatically and quickly rotates to the right, and the feed in the throwing cylinder 4 is thrown out by the centrifugal force formed by the rotation of the throwing cylinder 4. The right rotation of the throwing cylinder 4 will pull the pull rope 9, and the pull rope 9 will unfold from the shaft 7 and drive the shaft 7 to rotate and reset.

[0043] While the throwing cylinder 4 throws the feed, the first motor 22 rotates the inner rotating column 17 again by 180 degrees, and the opening of the quantitative groove 25 faces upward again and corresponds to the second feed inlet 19, and the quantitative groove 25 is filled with a certain amount of feed again.

[0044] When the feed is thrown, the second motor 5 is started again, and the output shaft of the second motor 5 rotates to drive the shaft 7 to rotate. The pull rope 9 is continuously wound around the shaft 7, and the other end of the pull rope 9 changes the direction of force through the fixed pulley 8, thereby pulling the throwing cylinder 4 to the left. The throwing cylinder 4 rotates to the left around the pin. The spring 10 is stretched to form a rebound force to the right. When the left outer wall of the throwing cylinder 4 contacts the fixed pulley 8 (if a threading ring is provided, it contacts the threading ring), the shaft 7 is locked by the brake 6. At this time, the feed inlet 15 corresponds to the first feed inlet 14 again.

[0045] In this way, intermittent feeding can be performed repeatedly through the PLC controller and the timer. The PLC controller and the timer are mature prior arts, and it is common knowledge well known to those skilled in the art to control the first motor 22, the second motor 5 and the brake 6 by using them, so they are not described in detail in this embodiment.

[0046] When the amount of feed filled in the quantitative groove 25 needs to be adjusted. Rotate the rotating rod 28 through the knob 29. The rotating rod 28 drives the positive and negative screw rods 27 to rotate. The positive and negative screw rods 27 drive the two nut seats 31 to move toward or in the opposite direction along the quantitative groove 25. When the two nut seats 31 move toward each other, the two connecting rods 32 both rotate upward, thereby driving the lifting plate 26 to move upward along the quantitative groove 25, and the amount of feed that can be filled in the quantitative groove 25 is reduced. When the two nut seats 31 move in the opposite direction, the two connecting rods 32 both rotate downward, thereby driving the lifting plate 26 to move downward along the quantitative groove 25, and the amount of feed that can be filled in the quantitative groove 25 is increased. In addition, the staff can intuitively judge the amount of feed filled in the quantitative groove 25 by observing the index on the annular scale line 24 corresponding to the indicator line 30.

[0047] When the feed in the storage box 2 is consumed for a period of time, the staff can clearly observe the remaining amount of feed in the storage box 2 through the cover plate 34 on the window. Thereby, it is convenient for the staff to replenish feed in the storage box 2 in time.

[0048] The utility model can adjust the amount of feed thrown each time accordingly according to the feeding demand of fish.

[0049] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0051] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A feeder for fish farming, comprising a mounting frame (1), a feed storage box (2), a feed feeding structure and a feed conveying structure, characterized in that: The storage box (2), the feeding structure and the feeding structure are all mounted on the top of the mounting frame (1) and are arranged in sequence from top to bottom. The storage box (2) is used to store feed and has a first discharge port (33) at its bottom. The feeding structure is used to scatter feed and has a first feed port (14) at its top. The feeding structure is used to transport feed in the storage box (2) to the feeding structure. The top of the feeding structure has a second feed port (19) corresponding to the first discharge port (33). The bottom of the feeding structure has a second discharge port (20) corresponding to the first feed port (14). The material conveying structure comprises an outer cylinder (16) and an inner rotating cylinder (17); The outer cylinder (16) is provided with a through slot (18), the through slot (18) is cylindrical in shape and penetrates the outer cylinder (16) from left to right, the second feed port (19) is provided on the top slot wall of the through slot (18), and extends upward to penetrate the outer cylinder (16), the second discharge port (20) is provided on the bottom slot wall of the through slot (18), and extends downward to penetrate the outer cylinder (16), and corresponds to the second feed port (19), a bracket (21) is fixed on the left outer side wall of the outer cylinder (16), a first motor (22) is installed on the bracket (21), a rotating shaft (23) is fixed on the output shaft of the first motor (22), and the rotating shaft (23) passes through the bracket (21) and corresponds to the center position of the through slot (18); The inner rotating column (17) is located in the through groove (18) in a matching connection manner and is rotatably connected to the through groove (18) via a bearing. The left end center position of the inner rotating column (17) is fixedly connected to the rotating shaft (23). A quantitative groove (25) corresponding to the second feed port (19) is provided on the outer wall of the inner rotating column (17). A lifting plate (26) and a positive and negative threaded rod (27) are arranged in the quantitative groove (25). The positive and negative threaded rod (27) extends horizontally to the left and right and is rotatably connected to the quantitative groove (25) via a bearing. A rotating rod (28) is fixed to the right end of the rotating rod (28), the right end of the rotating rod (28) passes through the inner rotating column (17) and is fixed with a knob (29), the outer parts of the positive thread part and the negative thread part of the positive and negative thread screw (27) are both sleeved with nut seats (31) in a threaded connection manner, the two nut seats (31) are both moved left and right along the groove wall of the quantitative groove (25), the lifting plate (26) is moved up and down along the groove wall of the quantitative groove (25), and connecting rods (32) are hinged between the bottom end of the lifting plate (26) and the top ends of the two nut seats (31).

2. A fish farming feeder according to claim 1, characterized in that: The right side outer wall of the inner rotating column (17) is engraved with an annular scale line (24) for indicating the amount of feed that can be accommodated inside the quantitative groove (25), and the knob (29) is engraved with an indication line (30) corresponding to the annular scale line (24).

3. A fish farming feeder according to claim 1, characterized in that: The material storage box (2) is a cylindrical structure with an open top. The material storage box (2) is fixed to the top of the outer cylinder (16). The first discharge port (33) is opened at the bottom of the material storage box (2) and communicates with the interior of the material storage box (2).

4. A fish farming feeder according to claim 3, characterized in that: A window communicating with the interior of the storage box (2) is provided on the right side wall thereof, and a cover plate (34) made of a transparent material is covered on the window.

5. The fish farming feeder according to claim 1, characterized in that: The feeding structure comprises a disc (3), a throwing cylinder (4), a second motor (5), a brake (6), a shaft (7), a fixed pulley (8), a pull rope (9), a spring (10), a first fixed plate (11) and a second fixed plate (12); the disc (3) is fixed between the top end of the mounting frame (1) and the bottom end of the outer cylinder (16); a fan-shaped groove (13) is provided on the front side of the disc (3); a first feed port (14) is provided at the top end of the disc (3) and communicates with the fan-shaped groove (13); the first fixed plate (11) and the second fixed plate (12) are both fixed to the top end of the disc (3) and are symmetrically arranged on the left and right; the shaft (7) is rotatably connected between the first fixed plate (11) and the second fixed plate (12) through a bearing; the second motor (5) is installed on the first fixed plate (11) to drive the shaft (7) to rotate; the brake (6) is installed on the second fixed plate (12) to The locking shaft (7) is a cylindrical structure with an open front end. The throwing tube (4) is located in the fan-shaped groove (13), and its rear end is rotatably connected between the upper and lower groove walls of the fan-shaped groove (13) through a pin shaft. The upper and lower outer side walls of the throwing tube (4) are respectively in contact with the upper and lower groove walls of the fan-shaped groove (13). The top of the throwing tube (4) is provided with a feeding port (15) which is connected to the inside thereof. The fixed pulley (8) is installed inside the fan-shaped groove (13) and is located on the left side of the throwing cylinder (4). The spring (10) is connected between the right side outer wall of the throwing cylinder (4) and the right side groove wall of the fan-shaped groove (13). One end of the pull rope (9) is connected to the left side outer wall of the throwing cylinder (4). The other end of the pull rope (9) passes around the fixed pulley (8) and passes through the disc (3) upward and is bound and wound around the shaft (7).

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