Classification screening equipment suitable for various fishes
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN NANHAI LINJI AQUATIC PROD CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-12
AI Technical Summary
Existing fish grading and screening equipment has poor accuracy in grading live fish and lacks versatility, making it difficult to adapt to different species and growth stages of fish, which limits the scope of application of the equipment and increases costs.
It adopts an electric conveyor belt and an adjustable height screening roller structure. By adjusting the angle and gap between the screening roller and the conveyor belt, it can achieve dynamic grading and screening of fish of different sizes, and use the size of the fish itself for physical screening.
It improves the accuracy and flexibility of live fish grading and screening, expands the application range of the equipment, and reduces equipment investment costs.
Smart Images
Figure CN224219209U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aquaculture equipment technology, and in particular to a grading and screening device suitable for various types of fish. Background Technology
[0002] In the aquaculture and fish processing industries, fish grading and sorting is a crucial process that directly impacts subsequent processing efficiency and product quality. Traditional fish grading and sorting methods primarily rely on manual operation or simple mechanical devices such as vibrating screens and drum screens. While these methods can achieve fish size grading to some extent, the lively and active nature of live fish makes it difficult for weighing and scanning mechanisms to accurately capture fish size information, thus affecting grading results and making live fish grading and sorting a challenge. Furthermore, existing mechanical sorting equipment is typically designed for single fish species or fixed size ranges, lacking versatility and flexibility. For example, some equipment uses screens or rollers with fixed spacing, failing to dynamically adjust sorting parameters according to changes in fish size. This results in poor adaptability to different species or growth stages of fish, limiting the equipment's application range and increasing equipment investment costs for aquaculture or processing enterprises. To address these issues, existing technologies urgently need improvement. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a grading and screening device suitable for various types of fish.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a grading and screening device suitable for various types of fish, the device including a screening track, and an electric conveyor belt provided inside the screening track for transporting fish.
[0005] The device also includes a support frame, which is positioned above the screening track. A screening roller is rotatably connected to the inner side of the support frame, and the screening roller is positioned at an angle to the electric conveyor belt.
[0006] The drive motor is connected to the screening roller and is used to drive the screening roller to rotate.
[0007] An electro-hydraulic actuator is located outside the screening track. The telescopic end of the electro-hydraulic actuator is connected to the bracket and is used to drive the bracket to move up and down to adjust the height between the screening roller and the electric conveyor belt.
[0008] The collection port is located on the side wall of the screening track and corresponds to the screening roller, and is used to collect fish that have been screened through the gap between the screening roller and the electric conveyor belt.
[0009] Furthermore, the screening roller is set at a 30-degree angle to the electric conveyor belt.
[0010] Furthermore, the outer side of the screening roller is provided with a guide groove.
[0011] Preferably, a collection box is provided on the side wall of the screening track, and the collection box is located below the collection port.
[0012] Preferably, a protective frame is provided on the outside of the screening track.
[0013] Furthermore, the bottom of the electro-hydraulic actuator is fixedly installed to the screening track and the outer side of the protective frame via a fixing plate.
[0014] More specifically, multiple sets of the support and the screening roller are arranged inside the screening track along the conveying direction of the electric conveyor belt, and the distance between each set of the screening roller and the electric conveyor belt decreases sequentially along the conveying direction.
[0015] Preferably, a guide plate is provided at the bottom inside the collection port.
[0016] Furthermore, the bracket is connected to the electro-hydraulic actuator via an adjustment groove, which is located on the screening track and the side wall of the protective frame, near both ends of the bracket.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] Fish are transported by an electric conveyor belt, with a rotatable screening roller positioned at an angle above it. The height between the screening roller and the conveyor belt is adjusted using an electro-hydraulic actuator. This structure utilizes the correlation between fish size (thickness) and the height between the screening roller and the conveyor belt; adjusting the height allows for the grading and screening of fish of different sizes. This physical size-based gap screening method effectively avoids measurement inaccuracies caused by the fish's jumping and moving during weighing or scanning, significantly improving the accuracy of live fish grading and screening. Furthermore, because the height of the screening gap can be dynamically adjusted as needed, this equipment can flexibly adapt to different species or growth stages of fish, overcoming the shortcomings of existing equipment in terms of versatility and flexibility, expanding the equipment's application range, and helping to reduce equipment investment costs for aquaculture or processing enterprises. Therefore, this invention effectively solves the technical problems of difficulty in live fish grading and screening and poor equipment versatility in existing technologies, demonstrating significant beneficial effects. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0020] Figure 2 This is a schematic diagram showing the connection between the screening track and the protective frame of this utility model.
[0021] Figure 3This is a structural schematic diagram showing the opening of the guide groove in this utility model.
[0022] In the diagram: 1. Screening track; 11. Electric conveyor belt; 12. Collection port; 13. Support; 14. Screening roller; 15. Guide groove; 16. Drive motor; 2. Protective frame; 21. Guide plate; 22. Collection box; 23. Fixing plate; 24. Electro-hydraulic actuator; 25. Adjustment groove. Detailed Implementation
[0023] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.
[0024] In the fields of aquaculture and fish processing, fish grading and screening is a crucial step in the production process. Traditional screening methods, such as manual sorting or using fixed-size screens / rollers, face challenges when handling live fish. The activity of live fish makes accurate size measurement difficult, and grading systems based on weighing or scanning are easily disturbed, affecting grading accuracy. Furthermore, existing equipment is often designed for specific fish species or size ranges, lacking versatility and failing to adapt to different species or growth stages of fish, increasing equipment investment and replacement costs. To overcome these limitations of existing technologies, this invention proposes a grading and screening device suitable for various fish species. This device, through a novel structural design, achieves efficient, accurate, and flexible grading and screening of live fish. The core of this solution lies in utilizing adjustable physical gaps for size screening, mainly including components such as a screening track 1, an electric conveyor belt 11, a support 13, screening rollers 14, a drive motor 16, an electro-hydraulic actuator 24, and a collection port 12.
[0025] like Figures 1 to 3 The illustrated grading and screening device suitable for various types of fish includes a screening track 1, an electric conveyor belt 11 inside the screening track 1 for transporting fish, and further includes:
[0026] The support 13 is set above the screening track 1. The inner side of the support 13 is rotatably connected to the screening roller 14, which is set at an angle to the electric conveyor belt 11.
[0027] Drive motor 16 is connected to screening roller 14 and is used to drive screening roller 14 to rotate.
[0028] An electro-hydraulic actuator 24 is provided on the outside of the screening track 1. The telescopic end of the electro-hydraulic actuator 24 is connected to the bracket 13 and is used to drive the bracket 13 to move up and down to adjust the height between the screening roller 14 and the electric conveyor belt 11.
[0029] Collection port 12 is located on the side wall of the screening track 1 and corresponds to the screening roller 14. It is used to collect fish that have been screened through the gap between the screening roller 14 and the electric conveyor belt 11.
[0030] In operation, fish to be graded are placed on an electric conveyor belt 11, which transports them to below a screening roller 14. A drive motor 16 drives the screening roller 14 to rotate. The angle between the screening roller 14 and the electric conveyor belt 11, and their rotation, help limit the movement of fish within this area. An electro-hydraulic actuator 24 pre-adjusts the distance between the screening roller 14 and the electric conveyor belt 11, setting the maximum thickness of the fish to be graded. When fish pass under the screening roller 14, those thicker than the set distance cannot pass and are conveyed through the gap to the collection port 12, thus being sorted. Fish with a thickness less than or equal to the set distance continue to be conveyed forward with the electric conveyor belt 11 (or are guided to other areas). By adjusting the gap size set by the electro-hydraulic actuator 24, fish of different sizes can be easily graded. For example, a larger gap can be set first to grade large fish, then the gap can be reduced to grade medium-sized fish, and finally, small fish will remain. The entire process utilizes the size characteristics of the fish themselves for physical screening, effectively avoiding the impact of live fish movement on grading accuracy, and achieving efficient, accurate and flexible fish grading operations.
[0031] In one embodiment of this utility model, the screening roller 14 is set at a 30-degree angle to the electric conveyor belt 11.
[0032] During operation, the 30-degree angle is optimized to provide a suitable tilt angle so that fish can be more effectively guided and positioned when conveyed by the electric conveyor belt 11 to the area below the screening roller 14.
[0033] As one embodiment of the present invention, a guide groove 15 is provided on the outer side of the screening roller 14; the guide groove 15 can be arranged along the axial or spiral direction of the screening roller 14 to form a groove structure for guiding the movement of fish.
[0034] As one embodiment of this utility model, a collection box 22 is provided on the side wall of the screening track 1, and the collection box 22 is located below the collection port 12.
[0035] During operation, a collection box 22 is provided below the side wall of the screening track 1, corresponding to the collection port 12. The collection box 22 is a container for holding fish, with its opening facing upwards, and is located directly below the collection port 12 or at a position that can receive fish falling from the collection port 12.
[0036] As one embodiment of this utility model, a protective frame 2 is provided on the outside of the screening track 1.
[0037] As one embodiment of this utility model, the bottom of the electro-hydraulic actuator 24 is fixedly installed to the screening track 1 and the outer side of the protective frame 2 via a fixing plate 23; the electro-hydraulic actuator 24 is fixedly installed to the screening track 1 and the protective frame 2 via the fixing plate 23, which further limits the installation structure of the electro-hydraulic actuator 24 and provides a more stable and reliable support for the electro-hydraulic actuator 24.
[0038] As one embodiment of this utility model, multiple sets of supports 13 and screening rollers 14 are arranged in the screening track 1 along the conveying direction of the electric conveyor belt 11, and the distance between each set of screening rollers 14 and the electric conveyor belt 11 decreases sequentially along the conveying direction.
[0039] During operation, multiple sets of screening rollers 14, supported by brackets 13, are connected in series within the screening track 1, along the conveying direction of the electric conveyor belt 11. Each set of brackets 13 and screening rollers 14 is equipped with a corresponding drive motor 16 and electro-hydraulic actuators 24 (only a portion is shown in the figure). The angle between these screening rollers 14 and the electric conveyor belt 11 can be the same, but by adjusting each set of electro-hydraulic actuators 24, the vertical distance (i.e., screening gap) between adjacent sets of screening rollers 14 and the electric conveyor belt 11 decreases sequentially along the fish conveying direction. For example, the first set of screening rollers has a larger gap to screen out the largest fish; the second set has a slightly smaller gap to screen out the second largest fish, and so on, with the last set having the smallest gap.
[0040] The arrangement of multiple sets of screening rollers 14 and their progressively decreasing gaps along the conveying direction further enhance the grading function, enabling the equipment to perform multi-level grading and screening of fish. Thus, fish can be accurately divided into multiple size grades according to different grading requirements, improving the precision and efficiency of the grading and screening process.
[0041] As one embodiment of this utility model, a guide plate 21 is provided at the lower part of the inside of the collection port 12.
[0042] During operation, the guide plate 21 is set up to further guide the fish collection path, ensuring that fish that pass through the screening gap and fall into the collection port 12 can slide smoothly along the guide plate 21 to the predetermined collection position, such as the collection box 22.
[0043] In one embodiment of this utility model, the bracket 13 is connected to the electro-hydraulic push rod 24 through the adjustment groove 25. The adjustment groove 25 is opened on the side wall of the screening track 1 and the protective frame 2, which are close to both ends of the bracket 13.
[0044] During operation, adjustment grooves 25 are provided on the side walls of the screening track 1 and the protective frame 2, corresponding to the two ends of the bracket 13. The adjustment grooves 25 are typically long grooves extending vertically, used to guide and restrict the movement trajectory of the bracket 13 portion connected to the electro-hydraulic actuator 24.
[0045] Working principle of this utility model:
[0046] In use, the fish are transported by the electric conveyor belt 11 inside the screening track 1. The screening roller 14 is rotatably connected to the inside of the support 13. The screening roller 14 is at a 30-degree angle to the horizontal electric conveyor belt 11. The electro-hydraulic push rods 24 on both sides of the screening track 1 are controlled to move the support 13 up and down, and further adjust the height of the screening roller 14 and the electric conveyor belt 11. Since the larger the size of the fish, the greater its thickness, the distance between each set of screening rollers 14 and the electric conveyor belt 11 can be adjusted according to the size of the fish to be screened, so that the distance between each set of screening rollers 14 and the electric conveyor belt 11 decreases in sequence, and the fish can be screened from large to small size.
[0047] The control drive motor 16 can drive the screening roller 14 to rotate. The screened fish can be guided into the collection box 22 corresponding to the collection port 12 outside the screening roller 14 through the guide groove 15 on the outside of the screening roller 14. This solves the problem that live fish jumping around during the screening process makes it impossible for the weighing and scanning mechanism to accurately grade and screen the fish.
[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection claimed by this utility model, which is defined by the appended claims and their equivalents.
Claims
1. A grading and screening device suitable for various types of fish, comprising a screening track (1), wherein an electric conveyor belt (11) is provided on the inner side of the screening track (1) for transporting fish, characterized in that, Also includes: A support (13) is provided above the screening track (1). A screening roller (14) is rotatably connected to the inner side of the support (13). The screening roller (14) is set at an angle to the electric conveyor belt (11). A drive motor (16) is connected to the screening roller (14) for driving the screening roller (14) to rotate; An electro-hydraulic actuator (24) is provided on the outside of the screening track (1). The telescopic end of the electro-hydraulic actuator (24) is connected to the bracket (13) to drive the bracket (13) to move up and down, so as to adjust the height between the screening roller (14) and the electric conveyor belt (11). Collection port (12) is located on the side wall of the screening track (1) and corresponds to the screening roller (14) for collecting fish that have been screened through the gap between the screening roller (14) and the electric conveyor belt (11).
2. The grading and screening device applicable to various fish species according to claim 1, characterized in that, The screening roller (14) is set at a 30-degree angle to the electric conveyor belt (11).
3. The grading and screening device applicable to various fish species according to claim 2, characterized in that, The outer side of the screening roller (14) is provided with a guide groove (15).
4. The grading and screening device applicable to various fish species according to claim 1, characterized in that, A collection box (22) is provided on the side wall of the screening track (1), and the collection box (22) is located below the collection port (12).
5. The grading and screening device applicable to various fish species according to claim 1, characterized in that, The screening track (1) is provided with a protective frame (2) on the outside.
6. The grading and screening device applicable to various fish species according to claim 5, characterized in that, The bottom of the electro-hydraulic push rod (24) is fixedly installed to the outside of the screening track (1) and the protective frame (2) via a fixing plate (23).
7. The grading and screening device applicable to various fish species according to claim 1, characterized in that, Multiple sets of brackets (13) and screening rollers (14) are arranged in the screening track (1) along the conveying direction of the electric conveyor belt (11), and the distance between each set of screening rollers (14) and the electric conveyor belt (11) decreases sequentially along the conveying direction.
8. The grading and screening device applicable to various fish species according to claim 1, characterized in that, A guide plate (21) is provided at the bottom inside the collection port (12).
9. The grading and screening device applicable to various fish species according to claim 5, characterized in that, The bracket (13) is connected to the electro-hydraulic push rod (24) through the adjustment groove (25). The adjustment groove (25) is opened on the side wall of the screening track (1) and the protective frame (2) which are close to both ends of the bracket (13).