Fry screening device for aquaculture
By designing an automated fish fry screening device, which uses a servo motor to drive the screening net to achieve efficient fish fry screening, the problems of low efficiency and low precision in the existing technology have been solved. This has enabled efficient and automated fish fry screening, meeting the needs of large-scale aquaculture.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUANNAN COUNTY SHENGTANG BREEDING CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-05-15
AI Technical Summary
Existing fish fry screening devices are inefficient, rely on complex manual operation, and have low screening accuracy, failing to meet the high-efficiency and automated requirements of modern aquaculture.
Design a fish fry screening device including a bottom box, an upper shell, a collection box, a drive assembly, and a screening screen. The screening screen is driven by a servo motor to move along a guide rod to achieve automated screening of fish fry. Smaller fish fry enter the collection box through the mesh, while larger fish fry are blocked and screened.
It improves screening efficiency, reduces operational complexity and labor intensity, enhances screening accuracy and reliability, and meets the needs of large-scale modern aquaculture.
Smart Images
Figure CN224234492U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fish fry screening technology, and in particular to a fish fry screening device for aquaculture. Background Technology
[0002] In aquaculture, fry selection is a crucial step in ensuring farming efficiency and fish health. Selection allows for the classification of fry of different sizes, avoiding competition between large and small fry, and increasing stocking density and survival rates. Furthermore, selection helps to promptly identify weak or diseased fry, preventing the spread of disease and thus improving overall farming efficiency. Therefore, efficient and accurate fry selection technology is of great significance to aquaculture.
[0003] Currently, fish fry screening mainly relies on manual labor or simple mechanical devices, which suffers from low efficiency, high labor intensity, and low screening accuracy. For example, patent application CN202322557048.X proposes a fish fry screening device for aquaculture. Its screening principle involves placing a feed box at the rear of the screening box, using feed dispersion holes to attract fish fry to actively swim through primary and secondary filter screens, thereby classifying the fry by size. However, this screening method has significant drawbacks: firstly, the screening process depends on the active behavior of the fish fry, resulting in low screening efficiency; secondly, even after screening, manual removal of fry of different sizes is still required, increasing operational complexity and labor intensity. Furthermore, passive screening may result in some fry not being classified as expected, affecting the accuracy and reliability of the screening.
[0004] Therefore, there is an urgent need to develop a fish fry screening device that is highly efficient, automated, and easy to operate, in order to solve the problems of low screening efficiency and reliance on manual operation in existing technologies, thereby meeting the needs of modern aquaculture. Utility Model Content
[0005] The main objective of this invention is to provide a fish fry screening device for aquaculture, which can effectively solve the problems in the background art.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A fish fry screening device for aquaculture includes a base box with an upper shell fitted onto its upper end. The upper shell consists of a rectangular frame, a containment shell, a first limiting shell, a second limiting shell, a guide rod, and hanging rods. There are two containment shells. The rectangular frame is fixedly installed on the upper inner wall of the two containment shells. The first and second limiting shells are symmetrically fixedly installed on the outer wall of the rectangular frame and simultaneously fixedly installed at the inner ends of the two containment shells. The guide rod is fixedly installed inside the second limiting shell. There are two hanging rods symmetrically fixedly installed on the outer wall of one of the containment shells. A collection box is installed on the two hanging rods. The collection box consists of a box body and hooks. There are two hooks symmetrically fixedly installed at both ends of the box body. A drive assembly is installed on the first limiting shell. The drive assembly consists of a servo motor and a lead screw. The lead screw is fixedly installed on the output shaft of the servo motor. A screening screen is installed on the lead screw and the guide rod. The screening screen consists of a screen body, a first connecting ear, and a second connecting ear. The first and second connecting ears are symmetrically fixedly installed at both ends of the screen body.
[0008] Preferably, an outlet is provided on one side wall of one of the enclosure shells on the upper shell, and the two enclosure shells, the first limiting shell, and the second limiting shell are fitted onto the bottom box.
[0009] Preferably, the collection box is attached to the outer wall of one of the enclosure shells, and the box is located below the outlet, with the hook hanging on the hanging rod.
[0010] Preferably, the servo motor on the drive assembly is fixedly mounted on the upper end of the first limiting shell, and the lead screw is rotatably mounted inside the first limiting shell.
[0011] Preferably, the first connecting ear on the screening screen is movably installed inside the first limiting shell, and the first connecting ear has a threaded hole. The first connecting ear is installed on the lead screw through the threaded hole. The second connecting ear is movably installed inside the second limiting shell, and the second connecting ear has a through hole. The second connecting ear is movably sleeved on the guide rod through the through hole. The screen body is located inside the two enclosure shells and is in contact with the inner wall of the enclosure shell. The screen body is inclined towards the outlet side.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] By setting up a fish fry screening device consisting of a bottom box, an upper shell, a collection box, a drive assembly, and a screening net, efficient and automated fish fry screening can be achieved, reducing operational complexity and labor intensity. Specifically, the fish fry to be screened are placed in the upper shell along with water, ensuring the water level is higher than the screening net. Then, the drive assembly drives the screening net to move upward along the guide rod. Smaller fish fry can pass through the mesh of the net downward, while larger fish fry are blocked and screened out by the net, eventually sliding into the collection box along the inclined net. This device significantly improves screening efficiency, reduces the need for manual intervention, and solves the problem of low efficiency caused by relying on the fish fry's active behavior by replacing the traditional passive screening method with mechanical active screening. It further improves screening accuracy and reliability, meeting the needs of modern large-scale aquaculture. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is an exploded view of the bottom box, upper shell, and collection box of this utility model;
[0016] Figure 3 This is a schematic diagram showing the positional relationship between the drive assembly, the screening screen, the second limiting shell, and the guide rod of this utility model.
[0017] Figure 4 This is a schematic diagram of the structure of the screening screen of this utility model.
[0018] In the diagram: 1. Base box; 2. Upper shell; 3. Collection box; 4. Drive assembly; 5. Screening screen; 6. Rectangular frame; 7. Enclosure shell; 8. Outlet; 9. First limiting shell; 10. Second limiting shell; 11. Guide rod; 12. Hanging rod; 13. Box body; 14. Hook; 15. Servo motor; 16. Lead screw; 17. Mesh body; 18. First connecting ear; 19. Second connecting ear; 20. Threaded hole; 21. Through hole. Detailed Implementation
[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a fish fry screening device for aquaculture includes a base box 1, with an upper shell 2 fitted onto the upper end of the base box 1. The upper shell 2 consists of a rectangular frame 6, a containment shell 7, a first limiting shell 9, a second limiting shell 10, a guide rod 11, and a hanging rod 12. There are two containment shells 7. The rectangular frame 6 is fixedly installed on the upper inner wall of the two containment shells 7. The first limiting shell 9 and the second limiting shell 10 are symmetrically fixedly installed on the outer wall of the rectangular frame 6. The first limiting shell 9 and the second limiting shell 10 are simultaneously fixedly installed on the inner ends of the two containment shells 7. The guide rod 11 is fixedly installed inside the second limiting shell 10. The hanging rod 12 has two... Two collection boxes 3 are symmetrically and fixedly installed on the outer wall of one of the enclosure shells 7. A collection box 3 is installed on each of the two hanging rods 12. The collection box 3 consists of a box body 13 and hooks 14. There are two hooks 14, symmetrically and fixedly installed at both ends of the box body 13. A drive assembly 4 is installed on the first limiting shell 9. The drive assembly 4 consists of a servo motor 15 and a lead screw 16. The lead screw 16 is fixedly installed on the output shaft of the servo motor 15. A screening screen 5 is installed on the lead screw 16 and the guide rod 11. The screening screen 5 consists of a screen body 17, a first connecting ear 18, and a second connecting ear 19. The first connecting ear 18 and the second connecting ear... The 19 are symmetrically fixed at both ends of the net body 17. When screening fish fry, the bottom box 1 is placed on a stable surface, ensuring that the upper shell 2 is securely fitted onto the bottom box 1. Then, the fish fry to be screened, along with water, are poured into the upper shell 2, ensuring that the water level is higher than the net body 17 of the screening net 5, while keeping the water level lower than the outlet 8. At the same time, a certain amount of water is placed in the box body 13 of the collection box 3. Then, the servo motor 15 of the drive assembly 4 is started, thereby driving the lead screw 16 to rotate, which causes the first connecting ear 18 of the screening net 5 to rise along the lead screw 16, while the second connecting ear 19 slides upward along the guide rod 11. At this time, smaller fish fry can be screened. The fish fry move downwards through the mesh of the net body 17, thus moving to the bottom of the net body 17. Larger fish fry will be blocked and screened out by the net body 17. When the bottom of the net body 17 is flush with the bottom of the outlet 8, the fish fry on the net body 17 will slide along the inclined net body 17 to the outlet 8 and finally enter the collection box 3. After screening, the servo motor 15 is turned off, and the collection box 3 is removed to process the screened fish fry. When it is necessary to remove the fish fry retained in the bottom box 1 and the upper shell 2, the bottom box 1 and the upper shell 2 can be placed in a sufficiently large container, and then the upper shell 2 can be removed from the bottom box 1. At this time, the fish fry retained in the bottom box 1 and the upper shell 2 can be removed and processed.
[0021] Specifically, one of the enclosure shells 7 on the upper shell 2 has an outlet 8 on one side wall. The two enclosure shells 7, the first limiting shell 9, and the second limiting shell 10 are fitted onto the bottom box 1. The box body 13 on the collection box 3 is attached to the outer wall of one of the enclosure shells 7, and the box body 13 is located below the outlet 8. The hook 14 is hung on the hanging rod 12. The servo motor 15 on the drive assembly 4 is fixedly installed at the upper end of the first limiting shell 9. The lead screw 16 is rotatably installed inside the first limiting shell 9. The first connecting ear 18 on the screening screen 5 is movably installed inside the first limiting shell 9. The first connecting ear 18 has a threaded hole 20, and the first connecting ear 18 is installed on the lead screw 16 through the threaded hole 20. The second connecting ear 19 is movably installed inside the second limiting shell 10. The second connecting ear 19 has a through hole 21. The connecting ear 19 is movably fitted onto the guide rod 11 through the through hole 21. The net body 17 is located inside the two enclosure shells 7 and contacts the inner wall of the enclosure shell 7. The net body 17 is tilted towards the outlet 8 side. The size of the net body 17 can be set according to the screening requirements of the fish fry. When the collection box 3 needs to be removed, simply remove the hook 14 from the hanging rod 12. The fit design of the bottom box 1 and the upper shell 2 adopts a nested sealing structure to ensure that the connection is leak-proof. Specifically, the top edge of the bottom box 1 is provided with an annular flange, and the bottom of the upper shell 2 is fitted onto the annular flange. The two achieve physical sealing through interference fit. Food-grade silicone sealing strips are installed on the lower inner walls of the enclosure shell 7, the first limiting shell 9, and the second limiting shell 10. When the upper shell 2 is fitted into the bottom box 1, the sealing strip is deformed by pressure to fill the assembly gap, ensuring that there is no risk of side leakage during the screening process.
[0022] Ultimately, by setting up a fish fry screening device consisting of a bottom box 1, an upper shell 2, a collection box 3, a drive assembly 4, and a screening net 5, efficient and automated screening of fish fry can be achieved, reducing operational complexity and labor intensity. Specifically, the fish fry to be screened, along with water, are placed in the upper shell 2, with the water level higher than the screening net 5. Then, the drive assembly 4 drives the screening net 5 to move upward along the guide rod 11. At this time, smaller fish fry can pass downward through the mesh of the net body 17, while larger fish fry will be blocked and screened out by the net body 17, and finally slide into the collection box 3 along the inclined net body 17. This device significantly improves screening efficiency, reduces the need for manual intervention, and solves the problem of low efficiency caused by relying on the active behavior of fish fry by replacing the traditional passive screening method with mechanical active screening. It further improves screening accuracy and reliability, and meets the needs of large-scale modern aquaculture.
[0023] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A fish fry screening device for aquaculture, characterized in that: Includes a base box (1), the upper end of which is fitted with an upper shell (2). The upper shell (2) is composed of a rectangular frame (6), a enclosure shell (7), a first limiting shell (9), a second limiting shell (10), a guide rod (11), and a hanging rod (12). There are two enclosure shells (7). The rectangular frame (6) is fixedly installed on the upper inner wall of the two enclosure shells (7). The first limiting shell (9) and the second limiting shell (10) are symmetrically fixedly installed on the outer wall of the rectangular frame (6). The first limiting shell (9) and the second limiting shell (10) are simultaneously fixedly installed on the inner ends of the two enclosure shells (7). The guide rod (11) is fixedly installed inside the second limiting shell (10). There are two hanging rods (12) and they are symmetrically fixedly installed on the outer wall of one of the enclosure shells (7). On the two hanging rods (12), a collection box (3) is installed. The collection box (3) consists of a box body (13) and hooks (14). There are two hooks (14) and they are symmetrically fixed at both ends of the box body (13). A drive assembly (4) is installed on the first limiting shell (9). The drive assembly (4) consists of a servo motor (15) and a lead screw (16). The lead screw (16) is fixedly installed on the output shaft of the servo motor (15). A screening screen (5) is installed on the lead screw (16) and the guide rod (11). The screening screen (5) consists of a screen body (17), a first connecting ear (18), and a second connecting ear (19). The first connecting ear (18) and the second connecting ear (19) are symmetrically fixed at both ends of the screen body (17).
2. The fish fry screening device for aquaculture according to claim 1, characterized in that: An outlet (8) is provided on one side wall of one of the enclosure shells (7) on the upper shell (2), and the two enclosure shells (7), the first limiting shell (9), and the second limiting shell (10) are fitted onto the bottom box (1).
3. The fish fry screening device for aquaculture according to claim 2, characterized in that: The box body (13) of the collection box (3) is attached to the outer wall of one of the enclosure shells (7), and the box body (13) is located below the outlet (8), and the hook (14) is hung on the hanging rod (12).
4. The fish fry screening device for aquaculture according to claim 3, characterized in that: The servo motor (15) on the drive assembly (4) is fixedly installed on the upper end of the first limiting shell (9), and the lead screw (16) is rotatably installed inside the first limiting shell (9).
5. A fish fry screening device for aquaculture according to claim 4, characterized in that: The first connecting ear (18) on the screening screen (5) is movably installed in the first limiting shell (9). The first connecting ear (18) has a threaded hole (20). The first connecting ear (18) is installed on the lead screw (16) through the threaded hole (20). The second connecting ear (19) is movably installed in the second limiting shell (10). The second connecting ear (19) has a through hole (21). The second connecting ear (19) is movably sleeved on the guide rod (11) through the through hole (21). The mesh body (17) is located inside the two enclosure shells (7) and is in contact with the inner wall of the enclosure shell (7). The mesh body (17) is inclined towards the outlet (8).