Seed screening system with multi-layer screen structure

Abstract

The utility model discloses a seed screening system with a multi-layer screen structure, and belongs to the technical field of seed screening. Comprising a screening box; a movable frame is arranged in the screening box; the coarse screen and the fine screen are fixedly mounted between the inner walls of the moving frame; the feeding hole is formed in the top of the screening box; the discharge ports are formed in the two ends of the screening box; the shaking mechanism and the shaking mechanism are installed between the moving frame and the screening box, seeds are poured into the screening box from the feeding port and fall onto the coarse screen, the shaking mechanism drives the moving frame to move back and forth in a small range, the seeds are conveniently distributed in the width direction of the screen, gathering is avoided, and the seeds and small impurities fall onto the fine screen conveniently; then small impurities fall off from the fine screen, the seeds are screened out and flow out from the discharging port, and when the movable frame moves back and forth, the shaking mechanism synchronously enables the movable frame to shake up and down in a small range, so that the seeds falling into meshes are shaken out, the seeds slide out conveniently, and the seed screening effect is guaranteed.

Description

Technical Field

[0001] This application relates to the field of seed screening technology, and more specifically, to a seed screening system with a multi-layer sieve structure. Background Technology

[0002] To ensure seed quality, seeds often need to be screened during production and use to remove impurities such as sand, soil, and dust. Screening methods mostly involve using sieves.

[0003] The prior art document CN206009240U provides a seed screening machine, including a box and a box cover. A primary filter plate and a secondary filter plate are arranged inside the box, and the primary filter plate and the secondary filter plate are respectively inclined inside the box. The two ends of the primary filter plate are fixed to the bottom of the box cover by support rods and are suspended inside the box. The secondary filter plate is located below the primary filter plate. A feed hopper and a dust removal port are provided on the box cover. The feed hopper is located above the high end of the primary filter plate. A dust removal fan is provided in the dust removal port. A first discharge port and a second discharge port are respectively provided on the two side walls of the box. The bottom of the box is a tapered part that is wider at the top and narrower at the bottom. A discharge port is provided at the lower end of the tapered part. A support foot is provided at the bottom of the tapered part. A water inlet is provided on the side wall of the box.

[0004] Although the existing technical solutions described above can achieve the relevant beneficial effects through their structure, they still have the following drawbacks:

[0005] 1. If the sieve is fixed and the seeds fall at a fixed point, the seeds cannot be evenly distributed after falling onto the sieve and tend to clump together, which is not conducive to the dispersion and removal of impurities.

[0006] 2. When seeds move on the sieve, they often get stuck in the mesh, preventing them from rolling out smoothly and affecting the screening process.

[0007] Regarding the aforementioned related technologies, the inventor believes that if the sieve is fixed and the seed drop point is fixed, the seeds cannot be evenly distributed after falling onto the sieve and tend to clump together, which is not conducive to the dispersion and removal of impurities. When the seeds move on the sieve, they often get stuck in the mesh of the sieve, preventing them from rolling out smoothly and affecting the screening.

[0008] In view of this, we propose a seed screening system with a multi-layer sieve structure. Utility Model Content

[0009] 1. Technical problems to be solved

[0010] The purpose of this application is to provide a seed screening system with a multi-layer sieve structure, which solves the technical problems in the above-mentioned background technology where the sieve is fixed and the seed drop point is fixed, so the seeds cannot be evenly distributed after falling on the sieve and tend to clump together, which is not conducive to the dispersion and removal of impurities. When the seeds move on the sieve, they often get stuck in the mesh of the sieve, which prevents them from rolling out smoothly and affects the screening. The application achieves the desired technical effect.

[0011] 2. Technical Solution

[0012] This application provides a seed screening system with a multi-layer sieve structure, comprising:

[0013] Screening box;

[0014] A movable frame is provided inside the screening box;

[0015] A coarse screen and a fine screen are fixedly installed on the inner wall of the movable frame;

[0016] The top of the screening box has a feed inlet;

[0017] The screening box has discharge ports at both ends;

[0018] A shaking mechanism and a vibrating mechanism are installed between the movable frame and the screening box.

[0019] With the above method, seeds are poured into the screening box from the feed inlet and fall onto the coarse screen. The shaking mechanism drives the moving frame to move back and forth slightly, which facilitates the distribution of seeds along the width of the screen and avoids clumping. It also facilitates the falling of seeds and small impurities onto the fine screen, where the small impurities fall through and the seeds are screened out and flow out from the discharge outlet. In addition, as the moving frame moves back and forth, the shaking mechanism simultaneously causes the moving frame to shake up and down slightly, thereby shaking out the seeds that have fallen into the mesh, making it easier for the seeds to slide out and ensuring the seed screening effect.

[0020] The movable frame includes two side plates, with a coarse screen and a fine screen fixedly installed between the inner walls of the two side plates. A baffle is fixedly installed on the inner wall of the side plate near the high end of the fine screen. The coarse screen is located directly above the fine screen. Both the coarse and fine screens are inclined structures with opposite inclination directions. The lower ends of both the coarse and fine screens pass through the discharge port. An opening and closing door is installed at the bottom of the side wall of the screening box.

[0021] With the above scheme, the inclined coarse and fine screens facilitate seed movement, and since they are inclined in opposite directions, the seeds move along the coarse screen and are sieved onto the fine screen. Small impurities are then sieved off again, while large impurities and seeds slide out from the lower ends of the coarse and fine screens respectively, achieving the purpose of separate collection. The baffle prevents seeds at the upper end of the fine screen from entering the shaking mechanism.

[0022] Optionally, the shaking mechanism includes a sliding plate, which is slidably provided through one side of the screening box. A connecting cavity is opened on the sliding plate, and racks are fixedly installed on both inner walls of the connecting cavity. A fixed seat is fixedly installed on the outer wall of the screening box, and a motor is fixedly installed on the fixed seat. A half gear is fixedly sleeved on the output shaft of the motor. The half gear is located in the connecting cavity and meshes with the rack. The end of the sliding plate is connected to a shaking mechanism.

[0023] Through the above scheme, the motor drives the half gear to rotate continuously, and the half gear alternately meshes with two racks, thereby causing the slide to move back and forth, achieving the purpose of shaking the moving frame back and forth, which facilitates the distribution of seeds in the width direction of the sieve, avoids clumping, and facilitates screening.

[0024] Optionally, the shaking mechanism includes a wave groove, with two wave grooves at each end of the screening box. A support rod is fixedly installed on the end face of the side plate, and the support rod is slidably engaged in the wave groove. A guide rail is fixedly installed on the side wall of the side plate, and a connecting block is fixedly installed on the end face of the slide plate, and the connecting block is slidably engaged in the guide rail. The diameter of the support rod is equal to the inner cavity height of the wave groove, and the inner cavities of the connecting block and the guide rail are both T-shaped structures.

[0025] With the above scheme, during the back-and-forth movement of the mobile frame in the width direction, the support rod engages with the corrugated groove to provide support, and the support rod moves back and forth along the corrugated groove, thereby driving the mobile frame to move up and down repeatedly, which facilitates shaking out the seeds and impurities stuck in the mesh, ensuring that the seeds and impurities can slide out and be collected smoothly from the discharge port.

[0026] 3. Beneficial effects

[0027] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0028] 1. This application uses a motor to drive a half-gear to rotate continuously. The half-gear alternately meshes with two racks, thereby causing the slide to move back and forth, achieving the purpose of shaking the moving frame back and forth, which facilitates the distribution of seeds in the width direction of the sieve, avoids clumping, and facilitates screening;

[0029] 2. The inclined coarse and fine screens facilitate seed movement, and since they are inclined in opposite directions, the seeds move along the coarse screen and fall onto the fine screen. Small impurities are then sieved off again, while large impurities and seeds slide out from the lower ends of the coarse and fine screens respectively, achieving the purpose of separate collection.

[0030] 3. During the back-and-forth movement of the mobile frame in the width direction, the support rod engages with the corrugated groove to provide support, and the support rod moves back and forth along the corrugated groove, thereby driving the mobile frame to move up and down repeatedly, which facilitates shaking out the seeds and impurities stuck in the mesh, ensuring that the seeds and impurities can slide out and be collected smoothly from the discharge port. Attached Figure Description

[0031] Figure 1 This is a partial cross-sectional structural diagram of a seed screening system with a multi-layer sieve structure disclosed in a preferred embodiment of this application.

[0032] Figure 2 This is a cross-sectional structural diagram of the movable frame disclosed in a preferred embodiment of this application;

[0033] Figure 3 This application discloses a preferred embodiment. Figure 1 Enlarged structural diagram at point A in the middle;

[0034] Figure 4 This application discloses a preferred embodiment. Figure 1 Enlarged structural diagram at point B;

[0035] The following are the labels in the diagram: 1. Screening box; 2. Moving frame; 21. Side plate; 22. Baffle; 3. Coarse screen; 4. Fine screen; 5. Feed inlet; 6. Discharge outlet; 7. Shaking mechanism; 71. Slide plate; 72. Connecting cavity; 73. Rack; 74. Fixed base; 75. Motor; 76. Half gear; 8. Vibration mechanism; 81. Wave groove; 82. Support rod; 83. Connecting block; 84. Guide rail; 9. Opening and closing door. Detailed Implementation

[0036] The present application will be further described in detail below with reference to the accompanying drawings.

[0037] Reference Figure 1 and Figure 2This application provides a seed screening system with a multi-layer sieve structure, comprising: a screening box 1; a movable frame 2, the movable frame 2 being disposed inside the screening box 1; a coarse sieve 3 and a fine sieve 4, the coarse sieve 3 and the fine sieve 4 being fixedly installed between the inner walls of the movable frame 2; a feed inlet 5, the feed inlet 5 being opened at the top of the screening box 1; a discharge outlet 6, the discharge outlet 6 being opened at both ends of the screening box 1; a shaking mechanism 7 and a vibrating mechanism 8, the shaking mechanism 7 and the vibrating mechanism 8 being installed between the movable frame 2 and the screening box 1, through which seeds are fed from the feed inlet. The seeds are poured into the screening box 1 through the outlet 5 and fall onto the coarse screen 3. The shaking mechanism 7 drives the moving frame 2 to move back and forth slightly, which facilitates the distribution of seeds along the width of the screen and avoids clumping. This allows the seeds and small impurities to fall onto the fine screen 4. The small impurities then fall off the fine screen 4, and the seeds are screened out and flow out from the outlet 6. In addition, when the moving frame 2 moves back and forth, the shaking mechanism 8 simultaneously causes the moving frame 2 to shake up and down slightly, thereby shaking out the seeds that have fallen into the mesh, making it easier for the seeds to slide out and ensuring the seed screening effect.

[0038] Reference Figure 1 and Figure 2 The movable frame 2 includes two side plates 21. A coarse screen 3 and a fine screen 4 are fixedly installed between the inner walls of the two side plates 21. A baffle 22 is fixedly installed on the inner wall of the side plate 21 near the high end of the fine screen 4. The coarse screen 3 is located directly above the fine screen 4. Both the coarse screen 3 and the fine screen 4 are inclined in opposite directions. The lower ends of both the coarse screen 3 and the fine screen 4 pass through the discharge port 6. An opening and closing door 9 is installed at the bottom of the side wall of the screening box 1. The movable frame 2 includes two side plates 21. Furthermore, the coarse screen 3 and the fine screen 4 are fixedly installed between the inner walls of the two side plates 21. A baffle 22 is fixedly installed between the inner walls of the side plates 21 near the high end of the fine screen 4. The inclined coarse screen 3 and the fine screen 4 facilitate seed movement, and since the inclination directions are opposite, the seeds move along the coarse screen 3 and are screened onto the fine screen 4. Then, small impurities are screened off again, while large impurities and seeds slide out from the lower ends of the coarse screen 3 and the fine screen 4 respectively, achieving the purpose of separate collection. The baffle 22 prevents the seeds at the high end of the fine screen 4 from entering the shaking mechanism 8.

[0039] Reference Figure 1 and Figure 3The shaking mechanism 7 includes a slide plate 71. The slide plate 71 is slidably provided through one side of the screening box 1. A connecting cavity 72 is opened on the slide plate 71. Racks 73 are fixedly installed on both inner walls of the connecting cavity 72. A fixed seat 74 is fixedly installed on the outer wall of the screening box 1. A motor 75 is fixedly installed on the fixed seat 74. A half gear 76 is fixedly sleeved on the output shaft of the motor 75. The half gear 76 is located in the connecting cavity 72 and meshes with the racks 73. The end of the slide plate 71 is connected to the shaking mechanism 8. The motor 75 drives the half gear 76 to rotate continuously. The half gear 76 alternately meshes with the two racks 73, thereby making the slide plate 71 move back and forth, achieving the purpose of shaking the moving frame 2 back and forth, which facilitates the distribution of seeds in the width direction of the screen, avoids clumping, and facilitates screening.

[0040] Reference Figures 1 to 4 The shaking mechanism 8 includes a wave groove 81. Two wave grooves 81 are opened at both ends of the screening box 1. A support rod 82 is fixedly installed on the end face of the side plate 21. The support rod 82 is slidably engaged in the wave groove 81. A guide rail 84 is fixedly installed on the side wall of the side plate 21. A connecting block 83 is fixedly installed on the end face of the slide plate 71. The connecting block 83 is slidably engaged in the guide rail 84. The diameter of the support rod 82 is equal to the inner cavity height of the wave groove 81. The inner cavities of the connecting block 83 and the guide rail 84 are both T-shaped structures. During the back-and-forth movement of the moving frame 2 in the width direction, the support rod 82 engages with the wave groove 81 to provide support. The support rod 82 moves back and forth along the wave groove 81, thereby driving the moving frame 2 to move up and down repeatedly, which facilitates shaking out the seeds and impurities stuck in the mesh, ensuring that the seeds and impurities can slide out and be collected smoothly from the discharge port 6.

[0041] Working principle: Seeds are poured into the screening box 1 through the feed inlet 5 and fall onto the coarse screen 3. The motor 75 drives the half gear 76 to rotate continuously. The half gear 76 alternately meshes with two racks 73, thereby causing the slide plate 71 to move back and forth, achieving the purpose of shaking the moving frame 2 back and forth. This facilitates the distribution of seeds in the width direction of the screen, avoids clumping, and facilitates screening. The inclined coarse screen 3 and fine screen 4 facilitate the movement of seeds, and since the inclination directions are opposite, the seeds move along the coarse screen 3 and are screened onto the fine screen 4. Then, small impurities are screened off again, while large impurities and seeds slide out from the lower ends of the coarse screen 3 and fine screen 4 respectively, achieving the purpose of separate collection. During the back and forth movement of the moving frame 2 in the width direction, the support rod 82 engages with the wave groove 81 to provide support, and the support rod 82 moves back and forth along the wave groove 81, thereby driving the moving frame 2 to move up and down repeatedly, which facilitates shaking out the seeds and impurities stuck in the mesh, ensuring that the seeds and impurities can slide out smoothly from the discharge port 6 for collection.

Claims

1. A seed screening system with a multi-layer sieve structure, characterized in that: Include: Screening box (1); The movable frame (2) is provided inside the screening box (1); A coarse screen (3) and a fine screen (4) are fixedly installed on the inner wall of the movable frame (2); The top of the screening box (1) has a feed inlet (5); The screening box (1) has discharge ports (6) at both ends; A shaking mechanism (7) and a vibrating mechanism (8) are installed between the movable frame (2) and the screening box (1).

2. The seed screening system with a multi-layer sieve structure according to claim 1, characterized in that: The coarse screen (3) is located directly above the fine screen (4). Both the coarse screen (3) and the fine screen (4) are inclined structures with opposite inclination directions. The bottom ends of both the coarse screen (3) and the fine screen (4) pass through the discharge port (6). The bottom of the side wall of the screening box (1) is equipped with an opening and closing door (9).

3. The seed screening system with a multi-layer sieve structure according to claim 1, characterized in that: The movable frame (2) includes two side plates (21), and a coarse screen (3) and a fine screen (4) are fixedly installed between the inner walls of the two side plates (21). A baffle (22) is fixedly installed between the inner walls of the side plates (21) near the high end of the fine screen (4).

4. The seed screening system with a multi-layer sieve structure according to claim 3, characterized in that: The shaking mechanism (7) includes a sliding plate (71). The sliding plate (71) is slidably provided through one side of the screening box (1). A connecting cavity (72) is opened on the sliding plate (71). A rack (73) is fixedly installed on both inner walls of the connecting cavity (72). A fixing seat (74) is fixedly installed on the outer wall of the screening box (1). A motor (75) is fixedly installed on the fixing seat (74). A half gear (76) is fixedly sleeved on the output shaft of the motor (75). The half gear (76) is located in the connecting cavity (72) and meshes with the rack (73). The end of the sliding plate (71) is connected to the shaking mechanism (8).

5. The seed screening system with a multi-layer sieve structure according to claim 4, characterized in that: The shaking mechanism (8) includes a wave groove (81). Two wave grooves (81) are opened at both ends of the screening box (1). A support rod (82) is fixedly installed on the end face of the side plate (21). The support rod (82) is slidably engaged in the wave groove (81). A guide rail (84) is fixedly installed on the side wall of the side plate (21). A connecting block (83) is fixedly installed on the end face of the slide plate (71). The connecting block (83) is slidably engaged in the guide rail (84).

6. The seed screening system with a multi-layer sieve structure according to claim 5, characterized in that: The diameter of the support rod (82) is equal to the height of the inner cavity of the wave groove (81), and the inner cavities of the connecting block (83) and the guide rail (84) are both T-shaped structures.

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