A multi-stage seed screening device for agricultural production

Abstract

The utility model relates to agricultural production equipment technical field discloses a multistage seed screening equipment for agricultural production, including support frame, the movable installation of sieve box is in the support frame, the inside fixed mounting of sieve box has coarse screen and middle screen from top to bottom in proper order, the sieve box bottom is swingly installed with fine screen through the hinge, sieve box one end is fixed with the connecting block, the connecting block inside is hinged with the connecting rod, the connecting rod is away from sieve box one end hinged with L type drive shaft, drive shaft one end is fixed with the drive motor through the shaft coupling. Through the hinge hoisting sieve box in the support frame, the inside coarse screen, middle screen and fine screen are installed from top to bottom in the sieve box, and the fine screen is openable and closeable hinge with the sieve box, cooperate the connecting rod, L type drive shaft and drive motor installed in sieve box one end, when screening the seed, drive motor drives L type drive shaft to rotate, makes the connecting rod reciprocatingly push the sieve box, and further realizes the screening effect of seed.

Description

Technical Field

[0001] This utility model relates to the field of agricultural production equipment technology, and in particular to a multi-stage seed screening device for agricultural production. Background Technology

[0002] In current agricultural production, seed screening largely relies on manual sieving or simple single-stage equipment, which has significant limitations: manual screening is inefficient and labor-intensive, making it difficult to meet the needs of large-scale planting; single-stage equipment can only achieve separation of a single particle size, requiring multiple operations to complete the grading, and the fixed design of the screen makes cleaning and maintenance cumbersome, easily leading to clogging by impurities and affecting screening accuracy. With modern agriculture demanding higher standards for seed purity and grading efficiency, there is an urgent need for a device that can perform multi-stage continuous screening, is easy to operate and maintain, to address the efficiency and accuracy pain points of traditional screening methods, and help improve the quality and efficiency of agricultural production. This multi-stage seed screening equipment was developed to address these issues.

[0003] The prior art patent announcement number CN211839056U discloses a multi-stage seed screening device for agricultural production, belonging to the field of agricultural production equipment technology. This multi-stage seed screening device for agricultural production includes a shell, a first filter plate slidably connected to one inner wall of the shell, a first inclined plate slidably connected to one inner wall of the shell, a second filter plate slidably connected to one inner wall of the shell, a second inclined plate slidably connected to one inner wall of the shell, a third filter plate slidably connected to one inner wall of the shell, and a third inclined plate fixed to the bottom inner wall of the shell by screws. The top outer walls of the first, second, and third filter plates are respectively provided with filter holes of different sizes. The shell is equipped with a cleaning mechanism and a water screening mechanism.

[0004] Existing technologies use a first, second, and third filter plate to classify seeds by size. However, in practical use, the screening structure is located inside a sealed box, making cleaning and maintenance difficult when the filter plates become clogged. Furthermore, the equipment is complex to operate, struggles to quickly screen seeds of different sizes, and suffers from poor operational continuity. Therefore, we propose a multi-stage seed screening device for agricultural production, which solves the problems of low screening efficiency and inconvenient cleaning and maintenance, thus improving the device's practicality and processing efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-stage seed screening device for agricultural production, which solves the problems of low screening efficiency and inconvenient cleaning and maintenance of existing seed screening devices mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage seed screening device for agricultural production, comprising a support frame, a sieve box movably installed inside the support frame, a coarse sieve and a medium sieve fixedly installed from top to bottom inside the sieve box, a fine sieve movably installed at the bottom of the sieve box via a hinge, a connecting block fixedly provided at one end of the sieve box, a connecting rod hinged inside the connecting block, an L-shaped drive shaft hinged at the end of the connecting rod away from the sieve box, and a drive motor fixedly connected to one end of the drive shaft via a coupling.

[0007] The screen box has U-shaped blocks fixedly installed at the top of both sides. Each U-shaped block is hinged to a hanging rod by a pin. The top of the hanging rod is hinged to the inner wall of the support frame by a pin. There are four U-shaped blocks, which are symmetrically arranged at the top of both sides of the screen box.

[0008] The coarse screen has a coarse material discharge port fixed at the end away from the L-shaped drive shaft, the medium screen has a medium material discharge port fixed at the end near the L-shaped drive shaft, and the fine screen has a fine material discharge port fixed at the end away from the L-shaped drive shaft. The discharge ends of the coarse, medium, and fine material discharge ports are all inclined upwards at 3-5 degrees, and the extension length of the fine material discharge port is one-third of that of the coarse material discharge port.

[0009] The fine screen is fixedly provided with convex blocks on both sides, and the screen box is fixedly provided with concave blocks that correspond one-to-one with the convex blocks and fit into each other. The convex blocks and concave blocks are provided with corresponding threaded grooves inside, and the convex blocks and concave blocks are fixed to each other by fastening bolts.

[0010] The L-shaped drive shaft has bearing seats installed on both outer sides, and the L-shaped drive shaft is rotatably connected to the bearing seats. The bearing seats are fixedly installed on the support frame by screws. A PLC controller is fixedly installed on the upper outer wall of the support frame. The PLC controller is electrically connected to the drive motor and controls the start, stop and speed of the drive motor. The drive motor is fixedly installed on the outer wall of the support frame. A fixing rod is provided at the bottom of the support frame, and the fixing rod has several fixing holes.

[0011] This utility model discloses a multi-stage seed screening device for agricultural production. A screen box is hinged and suspended inside a support frame. The screen box contains a coarse screen, a medium screen, and a fine screen, installed from top to bottom. The fine screen is hinged to the screen box and can be opened and closed. A connecting rod, an L-shaped drive shaft, and a drive motor are installed at one end of the screen box. When screening seeds, the drive motor drives the L-shaped drive shaft to rotate, causing the connecting rod to reciprocate and push the screen box, thus achieving the seed screening effect. This structure is simple to operate, provides strong continuity of screening operations, and its open structure design facilitates maintenance and cleaning, making it more convenient to use. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of a partial structure of the sieve box of this utility model. Figure 1 ; Figure 3 This is a schematic diagram of a partial structure of the sieve box of this utility model. Figure 2 ; Figure 4 This is a schematic diagram of the cross-sectional structure of the sieve box of this utility model.

[0014] In the diagram: 1. Support frame; 2. Screen box; 3. Coarse screen; 4. Medium screen; 5. Fine screen; 6. Connecting block; 7. Connecting rod; 8. L-shaped drive shaft; 9. Drive motor; 10. U-shaped block; 11. Pin; 12. Hanging rod; 13. Coarse material discharge port; 14. Medium material discharge port; 15. Convex block; 16. Concave block; 17. Fastening bolt; 18. Bearing seat; 19. Screw; 20. PLC controller; 21. Fixing rod; 22. Fixing hole; 23. Hinge; 24. Fine material discharge port. Detailed Implementation

[0015] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0016] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a multi-stage seed screening device for agricultural production, including a support frame 1, a sieve box 2 movably installed inside the support frame 1, a coarse sieve 3 and a medium sieve 4 fixedly installed from top to bottom inside the sieve box 2, a fine sieve 5 movably installed at the bottom of the sieve box 2 via a hinge 23, a connecting block 6 fixedly installed at one end of the sieve box 2, a connecting rod 7 hinged inside the connecting block 6, an L-shaped drive shaft 8 hinged at the end of the connecting rod 7 away from the sieve box 2, a drive motor 9 fixedly connected at one end of the drive shaft via a coupling, U-shaped blocks 10 fixedly installed at the top of both sides of the sieve box 2, a hanging rod 12 hinged to the U-shaped blocks 10 via a pin 11, the top of the hanging rod 12 hinged to the inner wall of the support frame 1, bearing seats 18 installed on the outer sides of both ends of the L-shaped drive shaft 8, the bearing seats 18 fixedly installed on the support frame 1 via screws 19, a PLC controller 20 fixedly installed on the outer wall of the upper end of the support frame 1, the PLC controller 20 being electrically connected to the drive motor 9, and the drive motor 9 being fixedly installed on the outer wall of the support frame 1.

[0017] In operation, the drive motor 9 is started by the PLC controller 20. The motor drives the L-shaped drive shaft 8 to rotate via a coupling. The drive shaft 8 pulls the connecting block 6 via the connecting rod 7, causing the sieve box 2 to reciprocate around the suspension rod 12. After the seeds are put into the sieve box 2, impurities larger than the aperture of the coarse screen 3 are trapped during the swinging process, while the rest fall to the medium screen 4. The medium screen 4 separates medium-sized seeds, and the remaining small-sized seeds fall to the fine screen 5. The fine screen 5 filters out the smallest-sized seeds. The bearing seat 18 supports the drive shaft 8 to rotate stably. The entire screening process achieves seed grading through multi-stage screening.

[0018] The coarse screen 3 is fixedly provided with a coarse material discharge port 13 at the end away from the L-shaped drive shaft 8, the medium screen 4 is fixedly provided with a medium material discharge port 14 at the end near the L-shaped drive shaft 8, and the fine screen 5 is fixedly provided with a fine material discharge port 24 at the end away from the L-shaped drive shaft 8. The discharge ends of the coarse material discharge port 13, the medium material discharge port 14 and the fine material discharge port 24 are all inclined upward at 3-5 degrees. The fine screen 5 is fixedly provided with convex blocks 15 on both sides, and the screen box 2 is fixedly provided with concave blocks 16 that correspond one-to-one with the convex blocks 15 and fit into each other. The convex blocks 15 and the concave blocks 16 are fixed to each other by fastening bolts 17. The bottom of the support frame 1 is provided with a fixing rod 21, and the fixing rod 21 has several fixing holes 22.

[0019] During operation, as the screen box 2 swings, large impurities trapped by the coarse screen 3 are discharged from the coarse material outlet 13, which is farther from the drive end; medium-sized seeds separated by the medium screen 4 are discharged from the medium material outlet 14, which is closer to the drive end; and small-sized seeds screened by the fine screen 5 are discharged from the fine material outlet 24. All three outlets are tilted upwards by 3-5 degrees to reduce the probability of seeds being discharged without screening, ensuring screening efficiency. The fine screen 5 is fitted into the concave block 16 of the screen box 2 by the convex block 15 and fixed by the fastening bolt 17, and can be easily disassembled and assembled with the hinge 23. The support frame 1 is fixed to the ground through the fixing holes 22 of the fixing rod 21, improving the stability of the equipment operation. The entire grading and screening process is completed automatically.

[0020] Working Principle: First, connect the device to an external power source. Then, the PLC controller 20 starts the drive motor 9, which drives the L-shaped drive shaft 8 to rotate. This, in turn, causes one end of the connecting rod 7 to rotate eccentrically, while the other end of the connecting rod 7 pushes the screen box 2 to move. The top of the screen box 2 is movably connected to the support frame 1 via a U-shaped block 10, a pin 11, and a hanging rod 12. When the connecting rod 7 pushes the screen box 2 to reciprocate, the screen box 2 swings back and forth rhythmically. Then, the seeds are poured onto the coarse screen 3. The coarse screen 3, medium screen 4, and fine screen 5 installed from top to bottom inside the screen box 2, combined with the reciprocating pushing action of the connecting rod 7, achieve a three-stage sieving effect for the seeds. Seeds of different particle sizes are finally discharged from the coarse material outlet 13, medium material outlet 14, and fine material outlet 24, respectively, completing the screening operation. The detachable fixing method of the convex block 15 and the concave block 16, combined with the hinged connection between the fine screen 5 and the screen box 2, allows the bottom of the screen box 2 to be quickly opened by the staff, so as to facilitate the cleaning and maintenance of the fine screen 5 or the medium screen 4, making it more convenient to use.

[0021] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A multi-stage seed screening device for agricultural production, comprising a support frame (1), characterized in that: The support frame (1) has a screen box (2) installed inside. The screen box (2) has a coarse screen (3) and a medium screen (4) installed inside from top to bottom. The bottom of the screen box (2) has a fine screen (5) installed through a hinge (23). A connecting block (6) is fixedly provided at one end of the screen box (2). A connecting rod (7) is hinged inside the connecting block (6). An L-shaped drive shaft (8) is hinged at the end of the connecting rod (7) away from the screen box (2). A drive motor (9) is fixedly connected to one end of the drive shaft through a coupling.

2. The multi-stage seed screening device for agricultural production according to claim 1, characterized in that: U-shaped blocks (10) are fixedly installed on the top of both sides of the screen box (2). The U-shaped blocks (10) are hinged to the hanging rods (12) by pins (11). The top of the hanging rods (12) is hinged to the inner wall of the support frame (1).

3. The multi-stage seed screening device for agricultural production according to claim 1, characterized in that: The coarse screen (3) has a coarse material discharge port (13) fixedly installed at the end away from the L-shaped drive shaft (8), the medium screen (4) has a medium material discharge port (14) fixedly installed at the end near the L-shaped drive shaft (8), and the fine screen (5) has a fine material discharge port (24) fixedly installed at the end away from the L-shaped drive shaft (8). The discharge ends of the coarse material discharge port (13), the medium material discharge port (14), and the fine material discharge port (24) are all inclined upwards by 3-5 degrees.

4. The multi-stage seed screening device for agricultural production according to claim 3, characterized in that: The fine screen (5) has convex blocks (15) fixedly arranged on both sides, and the screen box (2) has concave blocks (16) fixedly arranged on both sides, which correspond one-to-one with the convex blocks (15) and fit into each other. The convex blocks (15) and concave blocks (16) are fixed to each other by fastening bolts (17).

5. The multi-stage seed screening device for agricultural production according to claim 4, characterized in that: The L-shaped drive shaft (8) has bearing seats (18) installed on the outer sides of both ends. The bearing seats (18) are fixedly installed on the support frame (1) by screws (19). A PLC controller (20) is fixedly installed on the outer wall of the upper end of the support frame (1).

6. The multi-stage seed screening device for agricultural production according to claim 5, characterized in that: The PLC controller (20) is electrically connected to the drive motor (9). The drive motor (9) is fixedly installed on the outer wall of the support frame (1). A fixing rod (21) is provided at the bottom of the support frame (1). The fixing rod (21) has several fixing holes (22).

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