An automatic feeding system and method for pond culture

Abstract

The application discloses a pond culture automatic bait feeding system and method, and belongs to the technical field of bait feeding equipment for aquaculture; the problem that the existing bait feeding mode cannot precisely control the nutrient supply for the breeding personnel is solved; and the specific structure comprises a door-shaped frame, a bait bin, a discharging mechanism, a lifting mechanism and a receiving tray; the bait bin is installed on the top of the door-shaped frame, and the bait bin is internally provided with bait; the bait bin is provided with the discharging mechanism at the bait outlet; the receiving tray is arranged directly below the discharging mechanism; and the receiving tray is connected to the bottom of the door-shaped frame through the lifting mechanism; in the application, the receiving tray containing bait is sunk into water to feed aquatic products; after the feeding time is reached, the receiving tray is lifted by the lifting mechanism; after the feeding is completed each time, the breeding personnel can analyze the density, the feeding amount, the feed efficiency and the growth condition of the aquatic product group according to the residual amount of bait in the receiving tray; and the feeding amount of the next time can be adjusted according to the residual amount of bait in the receiving tray, so that the precise bait feeding is realized.

Description

Technical Field

[0001] This invention relates to the field of aquaculture feeding equipment technology, and in particular to an automatic feeding system and method for pond aquaculture. Background Technology

[0002] Aquaculture refers to the raising of fish or seafood in ponds to provide food. Aquaculture generally includes the entire process from seedling to marketable aquatic products under artificial feeding and management. Based on its farming techniques, it can be specifically divided into extensive farming, intensive farming, and high-density intensive farming. Extensive farming involves stocking seedlings in small to medium-sized natural water bodies, relying entirely on natural feed to raise the aquatic products, such as fish farming in lakes and reservoirs and shellfish farming in shallow seas. Intensive farming uses feeding and fertilization methods in smaller bodies of water to raise aquatic products, such as pond fish farming, net cage fish farming, and enclosure aquaculture. High-density intensive farming uses methods such as flowing water, temperature control, aeration, and feeding high-quality feed to achieve high yields in small bodies of water, such as high-density flowing water fish and shrimp farming. Except for extensive farming, all other farming methods require feeding the water.

[0003] Compared to traditional manual feeding, automated feeding machines offer numerous conveniences and improve efficiency for the aquaculture industry. However, existing feeding machines directly scatter feed into the water using various spreading devices. While this method evenly distributes feed over a wide area, it lacks precision in controlling the amount of feed dispensed. Each dispensing is based on the experience of the aquaculture workers, making it impossible to ascertain whether the feed is actually consumed by the aquatic organisms. For example, too little feed may be insufficient for the aquatic population, while too much may sink to the bottom, resulting in waste, increased costs, and water pollution. This reliance on experience leads to significant discrepancies between the dispensed amount and the actual amount consumed, resulting in substantial errors and hindering accurate feedback from aquaculture workers. Therefore, existing feeding methods suffer from the inability to precisely control the amount of feed dispensed, failing to meet the requirements of precise nutrient supply and green, circular aquaculture. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic feeding system and method for pond aquaculture, which solves the problem that farmers cannot accurately control the amount of feed to be given using existing feeding methods.

[0005] Firstly, in order to achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An automatic feeding system for pond aquaculture includes a gantry frame, a feed bin, a feeding mechanism, a lifting mechanism, and a receiving tray. The feed bin is installed on the top of the gantry frame and contains feed. A feeding mechanism is provided at the outlet of the feed bin. A receiving tray is provided directly below the feeding mechanism, and the feeding mechanism transports the feed to the receiving tray. The receiving tray is connected to the bottom of the gantry frame through the lifting mechanism.

[0007] In this system, the feeding mechanism transports the feed from the feed bin to the receiving tray, and the lifting mechanism lowers the receiving tray into the water to feed the aquatic organisms. After the feeding time, the lifting mechanism raises the receiving tray. With this feeding method, after each feeding, the aquaculture personnel can judge the amount of feed consumed by the aquatic organisms based on the amount of feed remaining in the receiving tray. At the same time, the amount of feed remaining in the receiving tray also provides a good indication of the density and growth of the aquatic organisms, providing the aquaculture personnel with an accurate and reliable judgment standard. Furthermore, the amount of feed to be added next time can be selected based on the amount of feed remaining in the receiving tray, achieving precise feeding.

[0008] Furthermore, the lifting mechanism includes a first roller and a second roller; the first roller and the second roller are respectively connected to the bottom of the portal frame through two parallel drive shafts; one end of each drive shaft is rotatably connected to the portal frame, and the other end is respectively connected to a first motor and a second motor; the first motor and the second motor are both fixed to the portal frame;

[0009] The bottom of the first roller and the second roller are respectively provided with a first movable pulley and a second movable pulley; the bottom of the first movable pulley and the second movable pulley are connected to the receiving tray by a rod;

[0010] A first fixed pulley and a second fixed pulley are also provided between the first roller and the second roller; the first fixed pulley and the second fixed pulley are connected to the portal frame through a fixed shaft;

[0011] The first roller winds one end of the connecting rope, and the other end of the connecting rope passes through the first movable pulley, the first fixed pulley, the second fixed pulley, and the second movable pulley in sequence before being wound and connected to the second roller.

[0012] In this design, a rope connects the first and second movable pulleys. When the first and second motors drive the first and second rollers to rotate, the rope winds around them, lifting the first and second movable pulleys. The two movable pulleys are designed for synchronous lifting. When the first and second rollers rotate simultaneously and tighten the rope from both ends through winding, the rope tightens quickly, resulting in a fast lifting speed for the first and second movable pulleys. However, tightening from both ends results in a small lifting space for the first and second movable pulleys, i.e., a small lifting height, suitable for shallow ponds. When either the first or second roller rotates alone to tighten the rope, the rope tightens slowly, resulting in a slower lifting speed for the first and second movable pulleys, but the lifting space is larger, suitable for deeper ponds. In practical applications, different lifting schemes can be selected according to different aquaculture environments, making it widely applicable.

[0013] Furthermore, each drive shaft has two first rollers and two second rollers, with the two first rollers and two second rollers respectively located at both ends of the two drive shafts; two first movable pulleys and two second movable pulleys are respectively provided corresponding to the first rollers and the second rollers, and the two first movable pulleys and the two second movable pulleys are respectively connected by two lifting rods; the two connecting ears of the receiving tray are respectively connected to the two lifting rods.

[0014] In this design, two lifting rods are designed to connect to the two connecting ears of the receiving tray respectively, ensuring that the receiving tray can move smoothly during lifting and lowering, thus improving its stability. In addition, the lifting rods are designed so that multiple receiving trays can be connected to them, enabling a single lifting mechanism to lift multiple receiving trays.

[0015] Furthermore, the two sides of the portal frame are provided with sliding grooves; the center of the first movable pulley and the second movable pulley are both provided with sliding shafts, and the ends of the two sliding shafts are embedded in the sliding grooves.

[0016] In this design, the sliding shaft is designed inside the groove to limit its movement trajectory, ensuring that it moves in the vertical direction and improving the stability of the movable pulley's movement.

[0017] Furthermore, a flange is provided at the bottom of the feed bin, and a mounting plate is provided at the top of the gantry frame. The flange is fixedly connected to the mounting plate by bolts; the feed bin's outlet is formed between the flange and the mounting plate.

[0018] In this design, a flange is designed at the bottom of the bait bin for easy installation.

[0019] Furthermore, the feeding mechanism includes a rotating shaft and conveying blades, with the conveying blades wound around the rotating shaft; the rotating shaft is vertically positioned inside the discharge port between the flange and the mounting plate;

[0020] A hollow cavity is provided at the contact surface between the flange and the mounting plate, and a ring gear is provided inside the hollow cavity. The ring gear is connected to the bevel gear on the drive shaft through a transmission gear. The drive shaft passes through the hollow cavity. One end of the drive shaft is connected to the feeding motor through a coupling. The feeding motor is located on the top of the portal frame.

[0021] The ring gear is connected to one end of the bent shaft, and the other end of the bent shaft is connected to the edge of the conveying blade; the feeding motor drives the ring gear to rotate through the drive shaft, and the ring gear drives the conveying blade to rotate synchronously through the bent shaft.

[0022] In this scheme, the feed is conveyed from the outlet by the feed blades to prevent the feed from getting damp and solidifying at the outlet, thus ensuring the continuity of the discharge. The feed blades are driven to rotate by the bent shaft at the edge, without affecting the discharge path.

[0023] Furthermore, there are three bait bins, and a receiving tray is provided directly below the outlet of each bait bin;

[0024] The drive shaft passes through the outlet of the three bait bins and is connected to the three sets of feeding mechanisms. The feeding motor drives the three sets of feeding mechanisms to rotate synchronously through the drive shaft.

[0025] In this solution, the drive shaft connects three sets of feeding mechanisms, and a feeding motor drives the three bait bins to feed simultaneously, resulting in high discharge efficiency.

[0026] Furthermore, the first movable pulley is connected to the lifting rod through a connector with a U-shaped groove. The lifting rod rests in the U-shaped groove of the connector, and a pressure sensor is provided between the connector and the U-shaped groove.

[0027] In this solution, a pressure sensor is used to detect the mass of the feed tray and the feed inside. This mass can be used to analyze the amount of feed consumed by aquatic organisms, thereby accurately determining the density and growth status of aquatic organisms and providing data support for aquaculture personnel.

[0028] Secondly, based on the automatic feeding system for pond aquaculture provided in the first aspect, the present invention provides an automatic feeding method for pond aquaculture, comprising the following steps:

[0029] S1: Start the feeding motor to drive the conveying blades to rotate; during rotation, the bait inside the bait bin is sent out from the discharge port and falls into the receiving tray;

[0030] S2: After the bait enters the receiving tray, the pressure sensor detects the mass of the receiving tray before it enters the water;

[0031] S3: The first and second motors drive the first and second rollers to rotate respectively to release the rope; and the receiving tray is submerged in water;

[0032] S4: When the set feeding time is reached, the rope is retrieved by the rotation of the first and second rollers, causing the receiving tray to rise out of the water.

[0033] S5: Detect the mass of the feed tray after it exits water using a pressure sensor; and calculate the amount of feed lost based on the mass of the feed tray before it enters water and the mass of the feed tray after it exits water.

[0034] In this scheme, after the feed is delivered to the receiving tray, the tray is submerged in the water to feed the aquatic animals. After feeding, the tray is raised out of the water. This allows for the determination of the amount of feed consumed by the aquatic animals based on the amount of feed remaining in the receiving tray, thus achieving precise aquatic animal feeding.

[0035] Furthermore, S5 calculates the amount of bait disappearance:

[0036] Feed loss = (Mm) / (1 + feed water absorption rate)

[0037] Where M is the mass of the receiving tray before it enters the water; m is the mass of the receiving tray after it exits the water.

[0038] In this scheme, the amount of feed lost is the amount consumed by aquatic organisms. Considering that the feed inside the feeding tray will absorb water when it is in the water, the amount of feed lost is calculated based on the water absorption rate of the feed, making the calculation results more accurate and reliable.

[0039] The beneficial effects of this invention are:

[0040] The automatic feeding system for pond aquaculture provided by this invention uses a lifting mechanism to submerge a feeding tray in the water to feed aquatic organisms, and then raises it back to the surface after feeding. The remaining amount of feed in the tray is used to assess the growth of the aquatic organisms, providing a theoretical basis for judging the density, feed intake, feed efficiency, and growth rate of the aquatic population. Furthermore, the amount of feed to be given next time can be determined based on the remaining amount of feed in the tray. This method ensures that the feed is sufficient for the aquatic organisms while avoiding waste, achieving a balance between ensuring adequate food for the aquatic organisms and preventing feed waste, thus maximizing economic benefits.

[0041] The automatic feeding method for pond aquaculture provided by this invention calculates the amount of feed consumed based on the difference between the mass of the feed tray before it enters the water and the mass of the feed tray after it exits the water. At the same time, the water absorption rate is used to eliminate the influence of the weight gain of the feed after absorbing water on the calculation results, so the calculation results are accurate and reliable. It realizes the statistics of the amount of feed, making the aquaculture process more precise. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of an automatic feeding system for pond aquaculture according to the present invention;

[0043] Figure 2This is a three-dimensional structural diagram of the lifting mechanism of the present invention;

[0044] Figure 3 This is a side view cross-sectional structural diagram of an automatic feeding system for pond aquaculture according to the present invention;

[0045] Figure 4 This is a schematic diagram of the feeding mechanism of the present invention;

[0046] Figure 5 This is a schematic diagram of the connector structure of the present invention.

[0047] Figure label:

[0048] 1. Gantry frame; 2. Feed bin; 21. Flange; 3. Feeding mechanism; 31. Rotating shaft; 32. Conveying blades; 33. Ring gear; 34. Transmission gear; 35. Drive shaft; 36. Bent shaft; 37. Feeding motor; 4. Lifting mechanism; 41. First roller; 42. Second roller; 43. First motor; 44. Second motor; 45. Transmission shaft; 46. First movable pulley; 47. Second movable pulley; 48. First fixed pulley; 49. Second fixed pulley; 5. Receiving tray; 51. Lifting rod; 52. Connecting component; 53. Pressure sensor; Detailed Implementation

[0049] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various modifications are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0050] Example 1

[0051] like Figure 1 As shown, this embodiment provides an automatic feeding system for pond aquaculture. After feeding, the system can determine the amount of feed to be given next based on the amount of feed remaining, thus achieving precise feeding. It can also provide feedback on the growth status of aquatic organisms based on the amount of feed remaining, allowing aquaculture personnel to analyze the growth of the organisms. Specifically, it includes:

[0052] 1. Gantry frame; 2. Bait bin; 3. Feeding mechanism; 4. Lifting mechanism; and 5. Receiving tray;

[0053] The gantry frame 1 has a feed bin 2 installed on top, which contains feed. The feed bin 2 has a feeding structure at its outlet. A receiving tray 5 is located directly below the feeding mechanism 3, which transports the feed to the receiving tray 5. The receiving tray 5 is connected to the bottom of the gantry frame 1 via a lifting mechanism 4. The lifting mechanism 4 lowers the receiving tray 5 containing the feed into the water to feed the aquatic animals. When the feeding time is reached, the lifting mechanism 4 raises the receiving tray 5.

[0054] like Figure 2 and Figure 3 As shown, the lifting mechanism 4 includes a first roller 41, a second roller 42, a first motor 43, a second motor 44, a first movable pulley 46, a second movable pulley 47, a first fixed pulley 48, and a second fixed pulley 49. The first roller 41 and the second roller 42 are respectively connected to the bottom of the portal frame 1 via two parallel drive shafts 45. One end of each drive shaft 45 is rotatably connected to the portal frame 1, and the other end is respectively connected to the first motor 43 and the second motor 44. The first motor 43 and the second motor 44 are both fixed to the portal frame 1. The bottom of the first roller 41 and the second roller 42 are respectively provided with a first movable pulley 46 and a second movable pulley 47. The bottom of the first movable pulley 46 and the second movable pulley 47 are connected to the receiving tray 5 via rods. A first fixed pulley 48 and a second fixed pulley 49 are also provided between the first roller 41 and the second roller 42. The first fixed pulley 48 and the second fixed pulley 49 are connected to the portal frame 1 via fixed shafts. The first roller 41 is wound around one end of a connecting rope, and the other end of the rope passes sequentially through the first movable pulley 46, the first fixed pulley 48, the second fixed pulley 49, and the second movable pulley 47 before being wound around and connected to the second roller 42. The first movable pulley 46 and the second movable pulley 47 are connected by a single rope. When the first motor 43 and the second motor 44 drive the first roller 41 and the second roller 42 to rotate, the rope winds around them, thus lifting the first movable pulley 46 and the second movable pulley 47.

[0055] In a preferred embodiment, the first motor 43 and the second motor 44 are designed to drive the first roller 41 and the second roller 42 to rotate, thereby lifting the receiving tray 5. There are two lifting methods: The first method involves the first motor 43 and the second motor 44 driving the first roller 41 and the second roller 42 to rotate synchronously. During rotation, both rollers tighten the rope through winding, lifting the first movable pulley 46 and the second movable pulley 47. This method results in a fast rope tightening speed and a fast lifting speed for the first movable pulley 46 and the second movable pulley 47, but the tightening from both ends of the rope results in a small lifting space for the first movable pulley 46 and the second movable pulley 47, i.e., a small lifting height, suitable for shallower ponds. The second method involves the motor driving either the first roller 41 or the second roller 42 to rotate independently, winding and tightening the rope. This method results in a slower rope tightening speed and a slower lifting speed for the first movable pulley 46 and the second movable pulley 47, but a larger lifting space, suitable for deeper ponds. In practical applications, different lifting schemes can be selected according to different aquaculture environments.

[0056] Two first rollers 41 and two second rollers 42 are provided on the drive shaft 45. The two first rollers 41 and the two second rollers 42 are respectively located at both ends of the two drive shafts 45. Two first movable pulleys 46 and two second movable pulleys 47 are provided corresponding to the first rollers 41 and the second rollers 42, respectively. The two first movable pulleys 46 and the two second movable pulleys 47 are connected by two lifting rods 51. The two connecting ears of the receiving tray 5 are respectively connected to the two lifting rods 51. The design of the two lifting rods 51 to connect to the two connecting ears of the receiving tray 5 ensures that the receiving tray 5 can move smoothly during lifting and lowering, thus improving its stability. In addition, the lifting rods 51 are designed so that multiple receiving trays 5 can be connected to the lifting rods 51, so that a set of lifting mechanisms 4 can lift multiple receiving trays 5.

[0057] The portal frame 1 has sliding grooves on both sides; the center of the first movable pulley 46 and the second movable pulley 47 is provided with a sliding shaft, and the ends of the two sliding shafts are embedded in the sliding grooves; this design can limit the movement trajectory of the sliding shafts, ensure that they move in the vertical direction, and improve the stability of the movement of the movable pulleys.

[0058] The bait bin 2 has a flange 21 at the bottom and a mounting plate at the top of the gantry frame 1. The flange 21 is fixedly connected to the mounting plate by bolts. The outlet of the bait bin 2 is formed between the flange 21 and the mounting plate. The flange 21 is designed at the bottom of the bait bin 2 for easy installation.

[0059] like Figure 4As shown, the feeding mechanism 3 includes a rotating shaft 31, a conveying blade 32, a ring gear 33, a drive shaft 35, and a feeding motor 37. The conveying blade is wound around the rotating shaft 31. The rotating shaft 31 is vertically positioned in the discharge port between the flange 21 and the mounting plate. A hollow cavity is formed at the contact surface between the flange 21 and the mounting plate, and a ring gear is installed in the hollow cavity. The ring gear 33 is connected to the bevel gear on the drive shaft 35 via a transmission gear 34. The drive shaft 35 passes through the hollow cavity. One end of the drive shaft 35 is connected to the feeding motor 37 via a coupling. The feeding motor 37 is located at the top of the gantry frame 1. The ring gear 33 is connected to one end of a bent shaft 36, and the other end of the bent shaft 36 is connected to the edge of the conveying blade. The feeding motor 37 drives the ring gear to rotate via the drive shaft 35, and the ring gear drives the conveying blade 32 to rotate synchronously via the bent shaft 36. The feed is conveyed from the outlet by the feed blades 32 to prevent the feed from getting damp and sticking at the outlet, thus ensuring the continuity of the feed.

[0060] There are three bait bins 2, and a receiving tray 5 is located directly below the discharge port of each bait bin 2. The drive shaft 35 passes through the discharge ports of the three bait bins 2 and is connected to the three sets of feeding mechanisms 3. The feeding motor 37 drives the three sets of feeding mechanisms 3 to rotate synchronously through the drive shaft 35. The three bait bins 2 are fed at the same time by one feeding motor 37, which has high feeding efficiency.

[0061] like Figure 5 As shown, the first movable pulley 46 is connected to the lifting rod 51 via a connector 52 with a U-shaped groove. The lifting rod 51 rests within the U-shaped groove of the connector 52, and a pressure sensor 53 is installed between the connector 52 and the U-shaped groove. A pressure sensor is also installed below the second movable pulley 47. The pressure sensor 53 is used to detect the mass of the receiving tray 5 and the feed contained within it. This mass can be used to analyze the amount of feed consumed by the aquatic organisms, thereby accurately determining the density and growth status of the aquatic organisms and providing data support for aquaculture personnel. In this embodiment, the total mass of the three receiving trays 5 and the feed they contain is equal to the sum of the pressures detected by the four pressure sensors.

[0062] As a preferred embodiment, a controller can also be designed on the gantry frame 1. The pressure sensor 53, the first motor 43, the second motor 44 and the feeding motor 37 are all connected to the controller. The controller controls the feeding motor 37 to automatically discharge the feed. After the feed is discharged, the first motor 43 and the second motor 44 sink the receiving tray 5 into the water. After the preset feeding time is reached, the controller raises the receiving tray 5 out of the water and calculates the amount of feed lost.

[0063] Example 2

[0064] This embodiment, based on the automatic feeding system for pond aquaculture provided in Embodiment 1, provides an automatic feeding method for pond aquaculture, including the following steps:

[0065] S1: Start the feeding motor 37 to drive the conveying blades 32 to rotate; during rotation, the bait inside the bait bin 2 is sent out from the discharge port and falls into the receiving tray 5;

[0066] S2: After the bait enters the receiving tray 5, the pressure sensor 53 detects the mass of the receiving tray 5 before it enters the water;

[0067] S3: The first motor 43 and the second motor 44 drive the first roller 41 and the second roller 42 to rotate respectively to release the rope; and the receiving tray 5 is submerged in water;

[0068] S4: When the set feeding time is reached, the rope is retracted by the rotation of the first roller 41 and the second roller 42, causing the receiving tray 5 to rise out of the water.

[0069] S5: The pressure sensor 53 detects the mass of the receiving tray 5 after it exits water; and calculates the amount of bait lost based on the mass of the receiving tray 5 before it enters water and the mass of the receiving tray 5 after it exits water.

[0070] Feed loss = (Mm) / (1 + feed water absorption rate)

[0071] Where M is the mass of receiving tray 5 before entering the water; m is the mass of receiving tray 5 after exiting the water.

[0072] As a preferred embodiment, the water absorption rate of the bait can be measured by experimental methods. For example, take a 100g sample of bait, soak it in water for the soaking time until the aquatic feeding time is reached, take it out and weigh it. After weighing, divide the increase in the weight of the bait by 100g of the bait before it was put into the water to obtain the water absorption rate of the bait.

[0073] In this embodiment, after the feed is delivered to the receiving tray 5, the receiving tray 5 is submerged in the water to feed the aquatic animals, and then raised out of the water after feeding. This allows for the determination of the amount of feed consumed by the aquatic animals based on the amount of feed remaining in the receiving tray 5, thus achieving refined aquatic animal feeding. The amount of feed lost is the amount consumed by the aquatic animals. Considering that the feed inside the receiving tray 5 will absorb water when it is in the water, the amount of feed lost is calculated based on the water absorption rate of the feed, making the calculation result more accurate and reliable.

[0074] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of the invention and should be understood as not limiting the scope of protection of the invention to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the technical teachings disclosed herein without departing from the spirit of the invention, and these modifications and combinations are still within the scope of protection of the invention.

Claims

1. A feeding method based on an automatic feeding system for pond aquaculture, characterized in that: The automatic feeding system for pond aquaculture includes a gantry frame (1), a feed bin (2), a feeding mechanism (3), a lifting mechanism (4), and a receiving tray (5); the feed bin (2) is installed on the top of the gantry frame (1), and the feed bin (2) is filled with feed; the feeding mechanism (3) is provided at the outlet of the feed bin (2); the receiving tray (5) is provided directly below the feeding mechanism (3), and the feeding mechanism (3) transports the feed to the receiving tray (5); the receiving tray (5) is connected to the bottom of the gantry frame (1) through the lifting mechanism (4); The lifting mechanism (4) includes a first roller (41) and a second roller (42); the first roller (41) and the second roller (42) are respectively connected to the bottom of the portal frame (1) by two parallel transmission shafts (45); one end of each of the two transmission shafts (45) is rotatably connected to the portal frame (1), and the other end is respectively connected to a first motor (43) and a second motor (44); the first motor (43) and the second motor (44) are both fixed to the portal frame (1); the bottom of the first roller (41) and the second roller (42) are respectively provided with a first movable pulley (46) and a second movable pulley (47); The bottom of the first movable pulley (46) and the second movable pulley (47) are connected to the receiving tray (5) by a rod; a first fixed pulley (48) and a second fixed pulley (49) are also provided between the first roller (41) and the second roller (42); the first fixed pulley (48) and the second fixed pulley (49) are connected to the portal frame (1) by a fixed shaft; one end of the rope is wound around the first roller (41), and the other end of the rope passes through the first movable pulley (46), the first fixed pulley (48), the second fixed pulley (49) and the second movable pulley (47) in sequence and is wound around the second roller (42); Each of the drive shafts has two first rollers (41) and two second rollers (42), with the two first rollers (41) and two second rollers (42) respectively located at both ends of the two drive shafts; two first movable pulleys (46) and two second movable pulleys (47) are respectively provided for the first rollers (41) and the second rollers (42), and the two first movable pulleys (46) and the two second movable pulleys (47) are respectively connected by two lifting rods (51); the two connecting ears of the receiving tray (5) are respectively connected to the two lifting rods (51); There are two lifting methods for the lifting receiving tray (5). The first method is that the first motor (43) and the second motor (44) drive the first roller (41) and the second roller (42) to rotate synchronously. During the rotation, both of them tighten the rope through the winding action, and the first movable pulley (46) and the second movable pulley (47) are lifted during the tightening. The rope tightening speed of this lifting method is fast, and the lifting speed of the first movable pulley (46) and the second movable pulley (47) is fast. However, the tightening from both ends of the rope makes the lifting space of the first movable pulley (46) and the second movable pulley (47) small, that is, the lifting height is small, which is suitable for shallow ponds. The second method is that the motor drives either the first roller (41) or the second roller (42) to rotate alone to wind and tighten the rope. The rope tightening speed of this working method is slow, and the lifting speed of the first movable pulley (46) and the second movable pulley (47) is slow. However, the lifting space of the two is large, which is suitable for use in deeper ponds. The bait bin (2) is provided with a flange (21) at the bottom and a mounting plate is provided at the top of the gantry frame (1). The flange (21) is fixedly connected to the mounting plate by bolts. The outlet of the bait bin (2) is formed between the flange and the mounting plate. The feeding mechanism (3) includes a rotating shaft (31) and a conveying blade (32), the conveying blade (32) being wound around the rotating shaft (31); the rotating shaft (31) is vertically disposed in the discharge port between the flange (21) and the mounting plate; A hollow cavity is formed at the contact surface between the flange (21) and the mounting plate, and a ring gear (33) is provided inside the hollow cavity; the ring gear (33) is connected to a bevel gear on the drive shaft (35) via a transmission gear (34), and the drive shaft (35) passes through the hollow cavity; one end of the drive shaft (35) is connected to a feeding motor (37) via a coupling, and the feeding motor (37) is located on the top of the portal frame (1); the ring gear (33) One end of the bent shaft (36) is connected, and the other end of the bent shaft (36) is connected to the edge of the conveying blade (32); the feeding motor (37) drives the ring gear (33) to rotate through the drive shaft (35), and the ring gear (33) drives the conveying blade (32) to rotate synchronously through the bent shaft (36); the feed is conveyed from the outlet through the conveying blade (32) to prevent the feed from getting damp and solidifying at the outlet, thus preventing it from being discharged smoothly and ensuring the continuity of the discharge; The bait bins (2) are provided in three places, and a receiving tray (5) is provided directly below the outlet of each bait bin (2); the drive shaft (35) passes through the outlets of the three bait bins (2) and is connected to the three sets of feeding mechanisms (3) in a transmission manner; the feeding motor (37) drives the three sets of feeding mechanisms (3) to rotate synchronously through the drive shaft (35); The first movable pulley (46) is connected to the lifting rod (51) through a connector (52) with a U-shaped groove. The lifting rod (51) is placed in the U-shaped groove of the connector (52), and a pressure sensor (53) is provided between the connector (52) and the U-shaped groove. The feeding method of an automatic feeding system for pond aquaculture includes the following steps: S1: Start the feeding motor (37) to drive the feeding blades (32) to rotate; during rotation, the bait inside the bait bin (2) is sent out from the outlet and falls into the receiving tray (5). S2: After the bait enters the receiving tray (5), the mass of the receiving tray (5) before entering the water is detected by the pressure sensor (53); S3: The first roller (41) and the second roller (42) are driven to rotate by the first motor (43) and the second motor (44) respectively to release the rope; the receiving tray (5) is submerged in water; S4: When the set feeding time is reached, the rope is retrieved by the rotation of the first roller (41) and the second roller (42), so that the receiving tray (5) rises out of the water. S5: The mass of the receiving tray (5) after water discharge is detected by the pressure sensor (53); and the amount of feed lost is calculated based on the mass of the receiving tray (5) before entering the water and the mass of the receiving tray (5) after water discharge. Feed loss = (Mm) / (1 + feed water absorption rate) Where M is the mass of the receiving tray before it enters the water; m is the mass of the receiving tray after it exits the water.

2. The feeding method according to claim 1, characterized in that: The gantry frame (1) has sliding grooves on both sides; the center of the first movable pulley (46) and the second movable pulley (47) is provided with a sliding shaft, and the ends of the two sliding shafts are embedded in the sliding grooves.

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