Agricultural production screening device

Abstract

This utility model relates to the field of agricultural seed screening technology, specifically to an agricultural production screening device, comprising a frame, with connecting rods hinged to both ends of the inner cavity of the frame, and a screening box hinged between the four connecting rods on opposite sides. A screening screen is fixedly connected to the inner cavity of the screening box, and a driving component is provided on one side of the bottom of the screening box. A feeding hopper is fixedly connected to one side of the upper part of the frame, and a feeding box is connected to the inner cavity of the feeding hopper. The feeding box is located above the screening screen. The driving component includes a driving motor, and a base is fixedly connected to the lower part of the driving motor. Through a compound motion mechanism consisting of the driving motor, driving disc, connecting rods, and connecting rods, the screening box is driven to tilt and reciprocate. This motion not only allows the material to jump, roll, and be conveyed forward on the screening screen for size screening, but also causes materials of different qualities to stratify due to differences in inertia.

Description

Technical Field

[0001] This utility model relates to the field of agricultural seed screening technology, and more specifically, to an agricultural production screening device. Background Technology

[0002] In agricultural production, screening of materials such as grains, beans, and seeds is a key pretreatment step. The purpose is to remove impurities, dust, and substandard grains (such as broken or empty grains) to improve the purity and quality of the materials. Traditional screening devices mostly use vibrating screens to separate materials based on differences in particle size.

[0003] A search revealed that publication number (CN223530834U) discloses an agricultural grain seed screening device, relating to the field of seed screening technology. This invention includes a support frame and a screen frame, with the screen frame located inside the support frame. A connecting rod is rotatably installed between the support frame and the screen frame. A screen mesh is fixedly installed inside the screen frame. A feeding component is mounted on the support frame, and an intercepting component is installed inside the screen frame. Vibration of the screen frame causes seeds to move on the screen mesh. Larger seeds are intercepted by the baffle and move along the baffle to be discharged from the second hopper. Smaller seeds pass under the baffle and are discharged from the first hopper. This avoids the inconvenience of sorting seeds by size, thus facilitating screening. The outer side of the rotating shaft drives the feeding plate downwards, which moves the seeds from the storage hopper into the feeding hopper. The seeds fall from the feeding hopper onto the screen mesh of the screen frame, ensuring even seed distribution and facilitating feeding.

[0004] The aforementioned patent still has shortcomings in practical use. It cannot effectively remove defective seeds such as chaff and empty husks. These substandard seeds may be similar in size to plump seeds, but they are lighter. Traditional planar vibrating screening methods cannot effectively separate them based on differences in weight or specific gravity, which affects the overall quality of the final screened material.

[0005] Based on this, the present invention discloses an agricultural production screening device that can effectively separate lightweight, empty grains.

[0006] Based on this, this utility model discloses an agricultural production screening device. Summary of the Invention

[0007] To address the problems mentioned in the background art, this utility model provides an agricultural production screening device, which includes a frame. Connecting rods are hinged to both ends of the inner cavity of the frame. A screening box is hinged between the four connecting rods on opposite sides. A screening screen is fixedly connected to the inner cavity of the screening box. A driving component is provided on one side of the bottom of the screening box. A feeding hopper is fixedly connected to one side of the upper part of the frame. A feeding box is connected to the inner cavity of the feeding hopper and is located above the screening screen.

[0008] As a further improvement to this technical solution, the drive assembly includes a drive motor, the lower part of which is fixedly connected to a base, and the other side of the base is fixedly connected to one end of one side of the frame; the two ends of the upper part of the inner cavity of the frame are respectively movably connected to a rotating shaft through a support seat, and a drive disk is fixedly connected between the opposite sides of the two rotating shafts.

[0009] As a further improvement to this technical solution, a drive rod is fixedly connected between the two drive discs on opposite sides, and a connecting rod is movably connected to the surface of the drive rod. The upper part of the other side of the connecting rod is hinged to the lower part of the screening box.

[0010] As a further improvement to this technical solution, a dust blowing box is provided on one side of the material feeding box in the lower part of the inner cavity of the frame. A rotating shaft is provided in the inner cavity of the dust blowing box. Both ends of the rotating shaft pass through the dust blowing box. Fixed blocks are movably connected to both ends of the surface of the rotating shaft through bearings. The upper part of the fixed block is fixedly connected to the lower part of the frame.

[0011] As a further improvement to this technical solution, blades are fixedly connected to the surface of the rotating shaft, and an air blowing port is provided on one side of the dust blowing box, with the air blowing port located below the feeding box.

[0012] As a further improvement to this technical solution, a collection frame is fixedly connected to the other side of the lower part of the inner cavity of the frame, and a wedge plate is fixedly connected to the inner cavity of the collection frame. One side of the collection frame corresponds to the position of the air blowing port.

[0013] As a further improvement to this technical solution, a discharge hood is fixedly connected to the other side of the screening box, a guide plate is fixedly connected to the other side of the upper part of the screening screen, and a discharge port is opened on the side of the screening box near the guide plate.

[0014] As a further improvement to this technical solution, a synchronous pulley A is fixedly connected to the output shaft of the drive motor, a synchronous pulley B is fixedly connected to one end of one of the rotating shafts, a synchronous pulley C is fixedly connected to one end of the rotating shaft, and a synchronous belt is fitted together on the synchronous pulleys A, B, and C.

[0015] Compared with existing technologies, the beneficial effects of this utility model are: 1. In this agricultural production screening device, the screening box is driven to tilt and reciprocate by a compound motion mechanism consisting of a drive motor, a drive disc, a connecting rod and a connecting rod. This motion not only allows the material to jump, roll and be conveyed forward on the screening screen for size screening, but also causes materials of different qualities to be stratified due to differences in inertia.

[0016] 2. In this agricultural production screening device, the same drive motor drives the fan blades to rotate, forming a directional airflow below the material box in the material falling area. Full grains have a large mass and their falling trajectory is less affected by the airflow, falling almost vertically into the front of the screening box. Empty grains and dust are light in mass and are blown into the side collection frame by the airflow during the falling process. This achieves precise cleaning based on weight (specific gravity) differences, effectively solving the problem that traditional devices have difficulty removing light empty grains. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall side view of the structure of this utility model; Figure 3 This is a schematic diagram of the disassembled structure of this utility model; Figure 4 This is a schematic diagram of the structure of the feed hopper in this practical application; Figure 5 For practical purposes Figure 4 Enlarged structural diagram at point A in the diagram; Figure 6 This is a schematic diagram of the decomposed structure of this utility model.

[0018] The meanings of the labels in the diagram are as follows: 1. Frame; 2. Connecting rod; 3. Screening box; 4. Screening screen; 5. Feed hopper; 6. Feed box; 7. Drive motor; 8. Base; 9. Support seat; 10. Rotating shaft; 11. Drive disc; 12. Drive rod; 13. Connecting rod; 14. Dust blowing box; 15. Rotating shaft; 16. Fixing block; 17. Blade; 18. Collection frame; 19. Wedge plate; 20. Feed hood; 21. Guide plate; 22. Synchronous pulley A; 23. Synchronous pulley B; 24. Synchronous pulley C; 25. Synchronous belt. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Existing vibrating screening devices mainly rely on aperture size for separation, which cannot effectively remove inferior grains that are similar in size to qualified grains but are hollow inside.

[0021] Therefore, this utility model provides an agricultural material screening device, see [link]. Figures 1 to 6As shown, it includes a frame 1, a screening box 3 suspended inside the frame 1 by a hinged connecting rod 2, a screening screen 4 inside the screening box 3, a hopper 5 and a feeding box 6 on the upper part of the frame 1, and a drive assembly and a dust blowing box 14 on the lower part.

[0022] For details, see Figure 1 and Figure 6 As shown, the drive assembly includes a drive motor 7 fixed on the frame 1. The output shaft of the drive motor 7 is driven by a synchronous belt 25, which simultaneously drives the rotating shaft 10, the drive disc 11 fixed thereon, and the rotating shaft 15 inside the dust blowing box 14 to rotate.

[0023] During operation, the drive motor 7 starts and drives the rotating shaft 10 to rotate via the synchronous belt 25. The drive disk 11, which is fixed between the two rotating shafts 10, rotates accordingly. The drive rod 12, which is eccentrically set on the drive disk 11, drives the connecting rod 13, which is movably connected to it, to reciprocate. Since the upper end of the connecting rod 13 is hinged to the bottom of the screening box 3, and the screening box 3 is hinged to the frame 1 via four connecting rods 2, the reciprocating push-pull motion of the connecting rod 13 is converted into the regular back-and-forth tilting and reciprocating swing of the screening box 3 around its hinge point.

[0024] Further, see Figure 1 and Figure 3 As shown, the drive motor 7 also drives the rotating shaft 15 installed in the dust blowing box 14 to rotate via the synchronous belt 25, and the blades 17 fixed on the rotating shaft 15 rotate at high speed accordingly.

[0025] During operation, the blade 17 rotates to generate airflow, which is then blown horizontally out from the air outlet on the side of the dust blowing box 14, directly facing the material falling area below the feeding box 6.

[0026] Among them, see Figure 3 and Figure 6As shown, the material to be screened enters from the feed hopper 5 and is evenly distributed through the feed box 6. The screening box 3 tilts and swings back and forth under the drive component. The material falls onto the vibrating screening screen 4. Small impurities smaller than the screen holes, such as sand and debris, fall directly through the screen holes. The remaining material jumps and rolls under the vibration of the screen surface and moves towards the discharge port under the guidance of the guide plate 21. At the same time, the material is stratified due to vibration and inertia differences, with heavier materials at the bottom and lighter materials at the top. When the material falls from the outlet of the feed box 6, it immediately passes through the horizontal airflow blown out from the air outlet. Full and heavy grains are less affected by the airflow and fall almost vertically to the front area of ​​the screening screen 4, while very light empty grains, husks, and dust... During the descent, the material is blown off its original trajectory by the horizontal airflow and drifts into the collection box 18 on the other side of the frame 1. It is blocked and collected by the wedge plate 19. This first completes the preliminary cleaning based on weight. Subsequently, the heavier material that was not blown away, mainly full grains and a small amount of impurities of different sizes, falls onto the screening screen 4. At this time, the screening box 3 tilts and swings back and forth under the drive component, causing the material to be thrown, rolled and slid on the screen. The purpose of this stage is to screen by size. Small impurities smaller than the screen holes, such as sand and debris, fall directly through the screen holes. The qualified full grains move towards the discharge port under the guidance of the screen surface vibration and the guide plate 21, and are finally discharged from the discharge port and the discharge hood 20.

[0027] In summary, this utility model, through its compact design, allows materials to first pass through an airflow separation zone to remove light and shriveled particles, and then enter a vibrating screen zone to screen out small impurities by size before being conveyed. The two core processes are connected and highly efficient, significantly improving the purity and accuracy of screening.

[0028] Working principle: The drive motor 7 starts, transmitting power synchronously to the rotating shaft 10 and rotating shaft 15 via the synchronous belt 25. The rotating shaft 10 drives the drive disc 11 to rotate at a constant speed. The eccentric drive rod 12 on the drive disc 11 then performs circular motion. The drive rod 12 is hinged to the bottom of the screening box 3 via the connecting rod 13. Because the screening box 3 is constrained within the frame 1 by the four hinged connecting rods 2, the end motion of the connecting rod 13 is forced into a regular reciprocating tilting and oscillating motion, similar to rocking, around the hinge point between the screening box 3 and the connecting rod 2. The rotating shaft 15, synchronously rotating with the drive motor 7, drives the blades 17 to rotate at high speed, generating airflow that is blown horizontally from the air outlet, forming an air-separation zone directly below the feed box 6. When the material leaves the feed box 6 and begins to fall freely, it first passes through this zone, where heavier, fuller grains are separated. The airflow overcomes air resistance and falls almost vertically onto the screening screen 4 below. Lightweight particles such as empty or shriveled grains and dust are immediately blown laterally by the airflow and eventually fall into the collection frame 18 on the side. This step is completed first, and its main purpose is to separate light impurities. After air separation, the material falling onto the screening screen 4 is screened by the reciprocating oscillation of the screening box 3. The oscillation causes the material to jump and spread, and small impurities smaller than the screen holes are removed. At the same time, the material is conveyed on the screen surface. This stage mainly involves size classification and material conveying. Qualified material moves towards the discharge port under the guidance of the oscillation and the guide plate 21. Light impurities selected by the airflow are collected in the collection frame 18. Qualified and full material that has undergone air separation and screening is discharged from the discharge hood 20 at the end of the screening box 3, completing the entire screening process.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present utility have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screening device for agricultural production comprising a frame (1), characterised in that: Connecting rods (2) are hinged to both ends of the inner cavity of the frame (1). A screening box (3) is hinged between the four connecting rods (2) on opposite sides. A screening screen (4) is fixedly connected to the inner cavity of the screening box (3). A driving component is provided on one side of the bottom of the screening box (3). A feeding hopper (5) is fixedly connected to one side of the upper part of the frame (1). A feeding box (6) is connected to the inner cavity of the feeding hopper (5). The feeding box (6) is located above the screening screen (4).

2. The agricultural production screening device according to claim 1, characterized in that: The drive assembly includes a drive motor (7), the lower part of which is fixedly connected to a base (8), and the other side of the base (8) is fixedly connected to one end of one side of the frame (1); the two ends of the upper part of the inner cavity of the frame (1) are respectively movably connected to a rotating shaft (10) through a support seat (9), and a drive disk (11) is fixedly connected between the opposite sides of the two rotating shafts (10).

3. An agricultural production screening apparatus as claimed in claim 2, wherein: A drive rod (12) is fixedly connected between the two drive discs (11) on opposite sides. A connecting rod (13) is movably connected to the surface of the drive rod (12). The upper part of the other side of the connecting rod (13) is hinged to the lower part of the screening box (3).

4. The agricultural production screening device according to claim 3, characterized in that: A dust blowing box (14) is provided in the lower part of the inner cavity of the frame (1) on one side of the feeding box (6). A rotating shaft (15) is provided in the inner cavity of the dust blowing box (14). The two ends of the rotating shaft (15) pass through the dust blowing box (14) respectively. The two ends of the surface of the rotating shaft (15) are respectively connected to a fixing block (16) through a bearing. The upper part of the fixing block (16) is fixedly connected to the lower part of the frame (1).

5. An agricultural production screening device according to claim 4, characterized in that: The surface of the rotating shaft (15) is fixedly connected with blades (17), and the dust blowing box (14) has an air blowing port on one side, which is located below the feeding box (6).

6. An agricultural production screening device according to claim 5, characterized in that: A collection frame (18) is fixedly connected to the other side of the lower part of the inner cavity of the frame (1). A wedge plate (19) is fixedly connected to the inner cavity of the collection frame (18). One side of the collection frame (18) corresponds to the position of the air blowing port.

7. An agricultural production screening device according to claim 1, characterized in that: A discharge hood (20) is fixedly connected to the other side of the screening box (3), and a guide plate (21) is fixedly connected to the other side of the upper part of the screening screen (4). The screening box (3) has a discharge port on the side near the guide plate (21).

8. An agricultural production screening device according to claim 5, characterized in that: A synchronous pulley A (22) is fixedly connected to the output shaft of the drive motor (7), a synchronous pulley B (23) is fixedly connected to one end of one of the rotating shafts (10), a synchronous pulley C (24) is fixedly connected to one end of the rotating shaft (15), and a synchronous belt (25) is fitted together on the synchronous pulleys A (22), B (23), and C (24).

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