Automatic fish fry sorting machine

Abstract

The automatic fish fry sorting machine comprises a machine body, a sorting roller and a driving mechanism, and the machine body is provided with a first collecting assembly and a second collecting assembly; the sorting roller is arranged on the machine body and can rotate relative to the machine body, the sorting roller comprises a roller body and a transmission mechanism fixedly connected with the roller body, and the roller wall of the roller body is provided with a sorting gap penetrating through the inside and the outside of the roller wall; the driving mechanism is arranged on the machine body and connected with the transmission mechanism to drive the sorting roller to rotate, external fry are supplied to the outer side of the barrel, small fry of the external fry penetrate through the sorting gaps and then fall into the first collecting assembly, and large fry of the external fry move along with rotation of the barrel till falling into the second collecting assembly. Automatic and lossless sorting of fish fries can be achieved, the sorting efficiency is effectively improved, and mechanical damage to the fish fries caused by traditional manual sorting is reduced; the device is simple and reasonable in structure, high in practicability and suitable for large-scale aquaculture scenes.

Description

An automatic fish fry sorting machine Technical Field

[0001] This invention relates to the field of fish fry sorting machines, and more specifically to an automatic fish fry sorting machine. Background Technology

[0002] In aquaculture, it is often necessary to sort fish fry of different sizes to facilitate precise feeding and subsequent grading for sale. Currently, the most common method for sorting fish fry is to use a vibrating screen: the fish fry to be sorted are placed on a screen with a specific aperture, and the screen is continuously vibrated by manual shaking or by a motor, causing smaller fish fry to pass through the screen apertures and fall into a collection container, while larger fish fry remain on the screen surface, thus achieving separation by size.

[0003] However, the above-mentioned sorting methods have many insurmountable technical defects in practical applications, especially unsuitable for large-scale aquaculture scenarios: First, during the screen vibration process, a large number of fish fry will tumble and collide with each other at high frequency, and their bodies are easily rubbed and scraped against the edges of the screen openings, resulting in scale loss and body surface damage, reducing the activity and survival rate of the fish fry; moreover, the vibration intensity is difficult to control precisely, for example, too high an intensity will aggravate the damage, while too low an intensity will not achieve effective sorting. Second, in large-scale aquaculture scenarios, the stocking density of fish fry is large, and the fish are prone to accumulating on the screen surface. Small fish fry are easily wrapped in the fish pile and have difficulty contacting the screen openings, resulting in incomplete sorting and a high rate of missed selection; at the same time, the screen openings are easily blocked by fish fry mucus and water impurities, requiring frequent shutdowns for cleaning, reducing sorting efficiency. Therefore, providing an automatic fish fry sorting machine to achieve automated, rapid, and non-destructive sorting of fish fry, improve sorting efficiency, reduce the mechanical damage to fish fry caused by traditional sorting methods, and meet the sorting needs of large-scale aquaculture is of great significance. Summary of the Invention

[0004] To overcome the shortcomings and deficiencies of existing technologies, the present invention aims to provide an automatic fish fry sorting machine. This machine is equipped with a sorting roller rotatably supported on the machine body. When in use, a drive mechanism rotates the sorting roller, and the fish fry to be sorted fall onto the rotating surface of the roller. Smaller fry from outside the machine pass through sorting gaps that penetrate the roller wall and fall into the roller, where they are collected by a first collection component. Larger fry from outside the machine cannot pass through the sorting gaps and slide down the roller surface, where they are collected by a second collection component, thus achieving the separation of fish fry of different sizes. This invention enables automated and non-destructive sorting of fish fry, effectively improving sorting efficiency and reducing mechanical damage to the fry caused by traditional manual sorting. Its structure is simple and reasonable, highly practical, and suitable for large-scale aquaculture scenarios.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an automatic fish fry sorting machine, comprising a machine body, a sorting roller, and a drive mechanism. The machine body is provided with a first collection component and a second collection component. The sorting roller is disposed on the machine body and can rotate relative to the machine body. The sorting roller includes a cylinder and a transmission mechanism fixedly connected to the cylinder. The cylinder wall is provided with sorting gaps that penetrate the inside and outside of the cylinder wall. The drive mechanism is disposed on the machine body and connected to the transmission mechanism to drive the sorting roller to rotate. Fish fry from outside are supplied to the outside of the cylinder. Small fish fry from outside pass through the sorting gaps and fall into the first collection component. Large fish fry from outside move with the rotation of the cylinder until they fall into the second collection component.

[0006] Furthermore, the two ends of the cylinder are respectively provided with a first end plate and a second end plate, the cylinder wall includes a plurality of columnar members extending along the cylinder axial direction, the sorting gap is formed between adjacent columnar members, the two ends of the columnar members are fixedly connected to the first end plate and the second end plate respectively, and the surface of the columnar member is arc-shaped.

[0007] Furthermore, the first collection component includes a first guide plate, which is disposed inside the cylinder and is used to receive small fish fry that enter the cylinder through the sorting gaps.

[0008] Furthermore, the second collecting component includes a second guide plate, which is disposed below the cylinder and is used to receive large fish fry that fall as the cylinder rotates.

[0009] Furthermore, the first collection component includes a first guide plate and a first collection chamber, and the second collection component includes a second guide plate and a second collection chamber; the first guide plate is disposed inside the cylinder and is used to receive small fish fry entering the cylinder through the sorting gaps; the second guide plate is disposed below the cylinder and is used to receive large fish fry falling as the cylinder rotates; the first collection chamber and the second collection chamber are both disposed at the lower part of the machine body and are used to receive small fish fry and large fish fry conveyed by the first guide plate and the second guide plate, respectively.

[0010] Furthermore, the machine body also includes a sorting chamber and a feeding hopper. The sorting chamber is formed by a first side plate, a second side plate, a third side plate, and a fourth side plate. The cylinder is disposed within the sorting chamber. The second side plate is provided with a first discharge port for connecting the first guide plate and the first collection chamber. The third side plate is provided with a second discharge port for connecting the second guide plate and the second collection chamber. The feeding hopper is disposed at the upper part of the sorting chamber near the first side plate. The bottom output end of the feeding hopper forms a feeding port that cooperates with the outer side of the cylinder.

[0011] Furthermore, the first guide plate is inclined, and the lower end of the first guide plate is the outlet end; the longitudinal section of the first guide plate is V-shaped or trapezoidal.

[0012] Furthermore, the second guide plate is inclined, and the lower end of the second guide plate is the outlet end; the four edges of the second guide plate are fixedly connected to the lower parts of the first side plate, the second side plate, the third side plate and the fourth side plate.

[0013] Furthermore, the longitudinal section of the feed hopper is V-shaped or trapezoidal, and the feed inlet is located at the bottom of the feed inlet and extends in a strip shape along the axial direction of the cylinder.

[0014] Furthermore, the first side plate is provided with a material retrieval port and a detachable plate for closing the material retrieval port, the detachable plate being located below the feed hopper.

[0015] Furthermore, the transmission mechanism includes a first transmission gear disposed at the output end of the drive mechanism and a second transmission gear fixedly connected to the cylinder and rotatably disposed relative to the machine body, wherein the first transmission gear meshes with the second transmission gear.

[0016] Furthermore, the automatic fish fry sorting machine also includes a spraying device, which includes a main water pipe and a backwash spray pipe connected to the main water pipe. The backwash spray pipe is installed inside the cylinder and is used to flush the fish fry stuck in the sorting gap away from the cylinder wall so that they can fall into the second collection component.

[0017] Furthermore, the automatic fish fry sorting machine also includes a spraying device, which includes a main water pipe and a first water supply spray pipe and a second water supply spray pipe, both of which are connected to the main water pipe; the first water supply spray pipe is located in the feed hopper, and the second water supply spray pipe is located above the cylinder.

[0018] Furthermore, the automatic fish fry sorting machine also includes a rotating support assembly, which includes a support shaft and multiple limiting rollers. The multiple limiting rollers are distributed circumferentially along the second end plate and roll in contact with the second end plate. The support shaft is fixedly connected to the machine body and passes through the first end plate and is rotatably connected to the first end plate, or the support shaft is fixedly connected to the first end plate and its end away from the first end plate is rotatably connected to the machine body.

[0019] The beneficial effects of this invention are as follows: When the automatic fish fry sorting machine of this invention is in use, the drive mechanism drives the cylinder set inside the machine body to rotate via the transmission mechanism. The fish fry to be sorted fall onto the surface of the rotating cylinder. Smaller fish fry from outside the machine pass through the sorting gaps penetrating the cylinder wall and fall into the cylinder body, where they are collected by the first collection component. Larger fish fry from outside the machine cannot pass through the sorting gaps and slide down the surface of the cylinder body, where they are collected by the second collection component, thereby achieving the separation of fish fry of different sizes. This invention can achieve automated and non-destructive sorting of fish fry, effectively improving sorting efficiency and reducing the mechanical damage to fish fry caused by traditional manual sorting. Its structure is simple and reasonable, highly practical, and suitable for large-scale aquaculture scenarios. Attached Figure Description

[0020] Figure 1 is a three-dimensional structural diagram of the automatic fish fry sorting machine of the present invention.

[0021] Figure 2 is a three-dimensional structural diagram of the automatic fish fry sorting machine of the present invention from another perspective.

[0022] Figure 3 is another perspective three-dimensional structural schematic diagram of the automatic fish fry sorting machine of the present invention.

[0023] Figure 4 is a three-dimensional structural diagram of the automatic fish fry sorting machine of the present invention after the top plate is removed.

[0024] Figure 5 is a three-dimensional structural diagram of the automatic fish fry sorting machine of the present invention after removing the top plate and the second side plate.

[0025] Figure 6 is a three-dimensional structural diagram of the automatic fish fry sorting machine of the present invention after removing the top plate, the second side plate and the fourth side plate.

[0026] Figure 7 is a three-dimensional structural diagram of the cylinder of the present invention.

[0027] The reference numerals in the attached drawings include: 1. Machine body; 11. Sorting chamber; 111. First side plate; 112. Second side plate; 113. Third side plate; 114. Fourth side plate; 115. First discharge port; 116. Second discharge port; 117. Detachable plate; 118. Top plate; 119. Bottom plate; 12. First collection chamber; 13. Second collection chamber; 14. Feed hopper; 15. Feed inlet; 17. Pump chamber; 2. Sorting roller; 21. 1. Cylinder; 211. Columnar component; 212. Sorting gap; 213. First end plate; 214. Second end plate; 22. First transmission gear; 23. Second transmission gear; 3. Drive mechanism; 4. First guide plate; 5. Second guide plate; 6. Spraying device; 61. Backflushing spray pipe; 62. First water replenishment spray pipe; 63. Second water replenishment spray pipe; 64. Main water pipe; 7. Circulating water pump; 8. Support shaft; 9. Limiting roller. Detailed Implementation

[0028] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0029] Please refer to Figures 1-7. An automatic fish fry sorting machine includes a body 1, a sorting roller 2, and a drive mechanism 3. The body 1 is provided with a first collection component and a second collection component. The sorting roller 2 is disposed on the body 1 and can rotate relative to the body 1. The sorting roller 2 includes a cylinder 21 and a transmission mechanism fixedly connected to the cylinder 21. The cylinder wall of the cylinder 21 has a sorting gap 212 that runs through the inside and outside of the cylinder wall. The width of the sorting gap 212 is configured to be smaller than the minimum size of the large fish fry to be sorted and larger than the maximum size of the small fish fry. The drive mechanism 3 is fixed to the body 1 and connected to the transmission mechanism to drive the sorting roller 2 to rotate. Fish fry from outside are supplied to the outside of the cylinder 21. Small fish fry from outside pass through the sorting gap 212 and fall into the first collection component. Large fish fry from outside move with the rotation of the cylinder 21 until they fall into the second collection component. In this embodiment, the large and small fish fry are defined according to the actual size of the fish fry to be sorted during sorting.

[0030] Furthermore, a first end plate 213 and a second end plate 214 are respectively provided at both ends of the cylinder 21. The cylinder wall is composed of multiple columnar members 211 extending axially along the cylinder 21, and the sorting gap 212 is formed between adjacent columnar members 211. The two ends of the columnar members 211 are fixedly connected to the first end plate 213 and the second end plate 214 respectively, and the surface of the columnar members 211 is arc-shaped. The transmission mechanism is fixedly connected to the first end plate 213 and / or the second end plate 214. In this embodiment, the columnar members 211 are evenly arranged and spaced apart along the circumference of the cylinder 21 to form the cylinder wall of the cylinder 21. The width of the sorting gap 212 can be set to allow small fish fry to pass through while preventing large fish fry from passing through. The width of the sorting gap 212 can be flexibly designed according to the size of the fish fry to be sorted by adjusting the spacing of the columnar members 211 to adapt to the sorting needs of fish fry of different sizes. Because the sorting gap 212 is strip-shaped, it facilitates the smooth passage of elongated fish fry through the gap, and also allows the heads and tails of the fry to pass through simultaneously or nearly simultaneously, reducing the probability of getting stuck. The surface of the columnar member 211 is curved to prevent the ridges on the outer surface from injuring the fish fry.

[0031] Preferably, the columnar member 211 is a cylindrical member with a circular cross-sectional shape. During the actual contact between the fish fry and the cylinder 21, the annular outer surface of the columnar member 211 abuts against the fish fry. Compared with an outer surface with ridges, for example, compared with a rectangular outer surface, the ridges on the outer surface are avoided from injuring the fish fry, thus improving the sorting yield of the fish fry.

[0032] Furthermore, the first collection component includes a first guide plate 4 and a first collection chamber 12. The first guide plate 4 is disposed inside the cylinder 21 and is used to receive small fish fry that fall into the cylinder 21 through the sorting gap 212. The first guide plate 4 is inclined and its lower end serves as the outlet end, so that the fish fry can slide down naturally by gravity, avoiding damage caused by human intervention.

[0033] Furthermore, the second collection component includes a second guide plate 5 and a second collection chamber 13. The second guide plate 5 is located below the cylinder 21 and is used to receive large fish fry that fall onto the surface of the rotating cylinder 21. The second guide plate 5 is inclined and its lower end serves as the outlet end, which facilitates the fish fry to slide down naturally.

[0034] Furthermore, the machine body 1 also includes a sorting chamber 11 and a feeding hopper 14. The sorting chamber 11 is formed by a bottom plate 119 and a first side plate 111, a second side plate 112, a third side plate 113, and a fourth side plate 114 connected end to end. The cylinder 21 is horizontally arranged in the sorting chamber 11 and its two ends are rotatably connected to the second side plate 112 and the fourth side plate 114, respectively. The second side plate 112 has a first discharge port 115, which is connected to the outlet end of the first guide plate 4. The first collection chamber 12 is located at the lower part of the machine body 1 and is arranged corresponding to the first discharge port 115 to receive small fish fry that slide down the first guide plate 4. The third side plate 113... A second discharge port 116 is provided, which is connected to the outlet end of the second guide plate 5. The second collection chamber 13 is located at the lower part of the machine body 1 and is set corresponding to the second discharge port 116. It is used to receive large fish fry that slide down through the second guide plate 5. The bottom output end of the feed hopper 14 forms a feed port 15 that cooperates with the outer side of the cylinder 21.

[0035] When the automatic fish fry sorting machine of this embodiment is used, small fish fry fall into the first guide plate 4 through the sorting gap 212, and then into the first collection chamber 12 or the receiving container installed in the first collection chamber 12 through the first discharge port 115; large fish fry cannot pass through the sorting gap 212, and slide down to the second guide plate 5 along the rotation direction of the cylinder 21, and then fall into the second collection chamber 13 or the receiving container installed in the second collection chamber 13 through the second discharge port 116, thus realizing non-destructive sorting of fish fry.

[0036] Furthermore, the longitudinal section of the first guide plate 4 is V-shaped or trapezoidal. This structural design helps to increase the receiving area and guide the flow of fish fry, ensuring that the small fish fry fall smoothly from the first discharge port 115 into the first collection chamber 12. In this embodiment, the outlet end of the first guide plate 4 is fixed to the second side plate 112, ensuring a stable connection and precise guidance.

[0037] Furthermore, the four edges of the second guide plate 5 are fixedly connected to the lower parts of the first side plate 111, the second side plate 112, the third side plate 113, and the fourth side plate 114. The second guide plate 5 is located above the bottom plate 119. In use, large fish fry fall from the surface of the cylinder 21 into the second guide plate 5 and slide down along the second guide plate 5 into the second collection chamber 13. This structure is stable and has a complete receiving range, which can reduce the risk of fish fry being missed in the sorting chamber 11 after sorting.

[0038] In this embodiment, the feed hopper 14 is fixed to the upper part of the sorting chamber 11 near the end of the first side plate 111. The longitudinal section of the feed hopper 14 is V-shaped or trapezoidal. The feed inlet 15 is located at the bottom of the feed hopper 14 and extends in a strip shape along the axial direction of the cylinder 21. The cylinder 21 is located near the feed inlet 15 to receive the fish fry falling from the feed inlet 15. The strip-shaped feed inlet 15 and the strip-shaped sorting gap 212 cooperate with each other to further reduce the probability of fish fry getting stuck and ensure that the fish fry fall smoothly into the surface of the cylinder 21 or the sorting gap 212.

[0039] Furthermore, the upper end of the machine body 1 is also provided with a top plate 118, which is fixedly connected to the upper ends of the second side plate 112, the third side plate 113, and the fourth side plate 114, and is used to cover the upper part of the sorting chamber 11 to reduce water splashing, evaporation and the entry of external debris, and to ensure a clean sorting environment.

[0040] Furthermore, the first side plate 111 is provided with a retrieval opening and a detachable plate 117 for closing the retrieval opening. The detachable plate 117 is located below the feed hopper 14. After the automatic fish fry sorting machine is used, the detachable plate 117 can be removed to clean the fish fry or debris remaining in the sorting chamber 11, making maintenance and operation convenient.

[0041] Furthermore, the transmission mechanism includes a first transmission gear 22 fixed to the output end of the drive mechanism 3 and a second transmission gear 23 fixedly connected to the cylinder 21 and rotatably disposed relative to the machine body 1. The first transmission gear 22 and the second transmission gear 23 mesh. In this embodiment, the drive mechanism 3 adopts a drive motor. The rotating shaft of the drive motor drives the first transmission gear 22 to rotate, thereby driving the second transmission gear 23 and the cylinder 21 to rotate synchronously. The transmission is smooth and efficient, ensuring a continuous and stable sorting process.

[0042] Furthermore, the automatic fish fry sorting machine also includes a spraying device 6, which includes a main water pipe 64 and a backwash spray pipe 61 connected to the main water pipe 64. The backwash spray pipe 61 extends axially along the cylinder 21 and passes through the second side plate 112 into the cylinder 21. The backwash spray pipe 61 is equipped with multiple spaced spray nozzles facing the inner side of the cylinder wall to flush away fish fry stuck in the sorting gap 212. When the automatic fish fry sorting machine is working, some fish fry may get stuck in the sorting gap 212 and cannot detach themselves. The spray nozzles set in the cylinder 21 can spray liquid towards the inner side of the cylinder wall to flush away the stuck fish fry. In actual use, the rotation speed of the sorting drum 2 and the spraying pressure of the backwash spray pipe 61 can be flexibly adjusted according to the species and size of the fish fry to be sorted to ensure that the activity of the fish fry is not damaged.

[0043] Furthermore, the spraying device 6 also includes a first water replenishment spray pipe 62 and a second water replenishment spray pipe 63, both connected to the main water pipe 64. The first water replenishment spray pipe 62 passes through the second side plate 112 and extends into the feed hopper 14, extending axially along the cylinder 21. The second water replenishment spray pipe 63 passes through the second side plate 112 and extends into the sorting chamber 11, located above the cylinder 21 and extending axially along the cylinder 21. Both the first water replenishment spray pipe 62 and the second water replenishment spray pipe 63 have multiple spray nozzles to replenish water for the fish fry in the feed hopper 14 and on the surface of the cylinder 21, preventing dehydration. Simultaneously, some of the sprayed water can flow into the first guide plate 4 and the second guide plate 5, forming a buffered water flow to help the fish fry slide down the guide plates, further reducing frictional damage between the fish fry and the first guide plate 4 or the second guide plate 5, and improving sorting safety.

[0044] In this embodiment, the automatic fish fry sorting machine is also equipped with a circulating water pump 7 connected to the main water pipe 64, which supplies water to the main water pipe 64. The lower part of the machine body 1 is provided with a pump chamber 17 for housing the circulating water pump 7, resulting in a compact and reasonable structural layout. The pump chamber 17 can be located between the first collection chamber 12 and the second collection chamber 13, and is connected to both the first and second collection chambers. The spray water from the spraying device 6 can flow back to the first collection chamber 12, the second collection chamber 13, and the pump chamber 17, thus realizing the recycling of water resources.

[0045] Furthermore, the automatic fish fry sorting machine also includes a rotating support assembly, which is fixedly connected to the machine body 1 and cooperates with the first end plate 213 and the second end plate 214 of the sorting roller 2 to limit the radial displacement of the cylinder 21 and realize the smooth rotation of the cylinder 21 relative to the machine body 1.

[0046] Furthermore, the rotating support assembly includes a support shaft 8 and multiple limiting rollers 9, both of which are fixedly connected to the machine body 1. The support shaft 8 is rotatably connected to the first end plate 213 via bearings, and the multiple limiting rollers 9 are evenly distributed along the circumference of the second end plate 214 and roll in contact with it. Through this structural arrangement, the support shaft 8 and the limiting rollers 9 are respectively positioned at both ends of the cylinder 21, forming a bidirectional positioning support for the cylinder 21. This ensures smooth rotation of the cylinder 21, effectively reduces radial sway, and improves sorting accuracy and equipment operational stability.

[0047] Specifically, the first end plate 213 is a circular end plate, and the second end plate 214 is an annular end plate. The support shaft 8 and the limiting roller 9 are both disposed in the sorting chamber 11. The support shaft 8 is connected to the fourth side plate 114, passes through the fourth side plate 114, and can rotate relative to the cylinder 21. The wheel surface of the limiting roller 9 is in close contact with the second end plate 214 and can roll relative to the second end plate 214. The second transmission gear 23 is fixedly connected to the first end plate 213 or the second end plate 214. In this embodiment, it is preferable that the second transmission gear 23 is fixedly connected to the first end plate 213 to ensure stable transmission of transmission torque and avoid slippage when the cylinder 21 rotates.

[0048] In this embodiment, the sorting roller 2 is rotatably supported on the machine body 1, and the sorting gap 212 provided on the roller body 21 is configured to allow small fish fry to pass through, while large fish fry cannot pass through. When the automatic fish fry sorting machine is in use, the drive mechanism 3 drives the cylinder 21 set in the sorting chamber 11 to rotate via the transmission mechanism. After the fish fry are put into the feed 14, they enter the sorting chamber 11 through the feed inlet 15 and then fall onto the surface of the rotating cylinder 21. Small fish fry can fall into the inclined first guide plate 4 through the sorting gap 212 that runs through the cylinder wall and slide naturally down the first guide plate 4 to the first collection chamber 12. Large fish fry cannot pass through the sorting gap 212 and slide down the inclined second guide plate 5 along the rotation direction of the cylinder 21 and slide naturally down the second collection chamber 13. During sorting, the first collection chamber 12 and the second collection chamber 13 are filled with water in advance, which can further avoid dehydration damage to the fish fry and realize safe, non-destructive and rapid sorting of fish fry of different sizes.

[0049] The automatic fish fry sorting machine of the present invention has a simple structure and reasonable design. It adopts a sorting roller 2 that is rotatably supported on the machine body 1. By combining mechanical transmission with gravity sorting, it can effectively improve sorting efficiency and reduce labor costs. At the same time, by optimizing the structure of the first guide plate 4 and the second guide plate 5 and combining it with the use of the spraying device 6, it can effectively protect the activity of fish fry and is suitable for fish fry sorting scenarios in large-scale aquaculture.

[0050] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. An automatic fish fry sorting machine, characterized in that: The device includes a body, a sorting roller, and a drive mechanism. The body is equipped with a first collection component and a second collection component. The sorting roller is disposed on the body and can rotate relative to the body. The sorting roller includes a cylinder and a transmission mechanism fixedly connected to the cylinder. The cylinder wall has sorting gaps that penetrate the inside and outside of the cylinder wall. The drive mechanism is disposed on the body and connected to the transmission mechanism to drive the sorting roller to rotate. Fish fry from outside are supplied to the outside of the cylinder. Small fish fry from outside pass through the sorting gaps and fall into the first collection component. Large fish fry from outside move with the rotation of the cylinder until they fall into the second collection component.

2. The automatic fish fry sorting machine according to claim 1, characterized in that: The cylinder is provided with a first end plate and a second end plate at both ends. The cylinder wall includes a plurality of columnar members extending along the cylinder axis. The sorting gap is formed between adjacent columnar members. The two ends of the columnar members are fixedly connected to the first end plate and the second end plate, respectively. The surface of the columnar member is arc-shaped.

3. The automatic fish fry sorting machine according to claim 1, characterized in that: The first collection component includes a first guide plate, which is disposed inside the cylinder and is used to receive small fish fry that enter the cylinder through the sorting gaps.

4. The automatic fish fry sorting machine according to claim 1, characterized in that: The second collecting component includes a second guide plate, which is located below the cylinder and is used to catch large fish fry that fall as the cylinder rotates.

5. The automatic fish fry sorting machine according to claim 1, characterized in that: The first collection component includes a first guide plate and a first collection chamber, and the second collection component includes a second guide plate and a second collection chamber. The first guide plate is disposed inside the cylinder and is used to receive small fish fry that enter the cylinder through the sorting gap. The second guide plate is disposed below the cylinder and is used to receive large fish fry that fall as the cylinder rotates. The first collection chamber and the second collection chamber are both disposed at the lower part of the machine body and are used to receive small fish fry and large fish fry conveyed by the first guide plate and the second guide plate, respectively.

6. The automatic fish fry sorting machine according to claim 5, characterized in that: The machine body also includes a sorting chamber and a feeding hopper. The sorting chamber is formed by a first side plate, a second side plate, a third side plate, and a fourth side plate. The cylinder is disposed in the sorting chamber. The second side plate is provided with a first discharge port for connecting the first guide plate and the first collection chamber. The third side plate is provided with a second discharge port for connecting the second guide plate and the second collection chamber. The feeding hopper is disposed at the upper part of the sorting chamber near the first side plate. The bottom output end of the feeding hopper forms a feeding port that cooperates with the outer side of the cylinder.

7. The automatic fish fry sorting machine according to claim 1, characterized in that: The transmission mechanism includes a first transmission gear disposed at the output end of the drive mechanism and a second transmission gear fixedly connected to the cylinder and rotatably disposed relative to the machine body, wherein the first transmission gear meshes with the second transmission gear.

8. The automatic fish fry sorting machine according to claim 1, characterized in that: The automatic fish fry sorting machine also includes a spraying device, which includes a main water pipe and a backwash spray pipe connected to the main water pipe. The backwash spray pipe is installed inside the cylinder and is used to flush the fish fry stuck in the sorting gap away from the cylinder wall so that they can fall into the second collection component.

9. The automatic fish fry sorting machine according to claim 6, characterized in that: The automatic fish fry sorting machine also includes a spraying device, which includes a main water pipe and a first water supply spray pipe and a second water supply spray pipe, both of which are connected to the main water pipe; the first water supply spray pipe is located in the feed hopper, and the second water supply spray pipe is located above the cylinder.

10. The automatic fish fry sorting machine according to claim 2, characterized in that: It also includes a rotating support assembly, which includes a support shaft and multiple limiting rollers. The multiple limiting rollers are distributed circumferentially along the second end plate and roll in contact with the second end plate. The support shaft is fixedly connected to the machine body and rotatably connected to the first end plate, or the support shaft is fixedly connected to the first end plate and rotatably connected to the machine body at one end away from the first end plate.

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