A seed screening device for agricultural planting

Abstract

The application discloses a seed screening device for agricultural planting and belongs to the technical field of agricultural planting. The device comprises a machine box, the outer surfaces of a group of roller cylinders arranged inside the machine box are fixedly connected with rubber teeth, the inner walls of each roller cylinder are fixedly connected with a group of oscillating motors, and the output ends of two motors fixedly connected to the outer surface of the machine box are fixedly connected with middle roller cylinders. In the application, the fine screen mesh in contact with the motor reciprocates up and down under the driving of the motor, the rotation of the motor drives the group of roller cylinders and the rubber teeth to rotate synchronously, the oscillating motor drives the roller cylinders and the rubber teeth to vibrate, the dispersing effect on the damp and bunched seeds is improved, the fine screen mesh reciprocates horizontally and leftward and rightward synchronously under the arrangement of the arc-shaped convex blocks, the device is subjected to compound vibration in the longitudinal and horizontal directions, the influence of the adhesion between the damp seeds and the surface of the screen mesh and the bunching of the damp seeds on the screening is reduced, and the screening effect of the device on the damp seeds is improved.

Description

Technical Field

[0001] This invention belongs to the field of agricultural planting technology, and in particular relates to a seed screening device for agricultural planting. Background Technology

[0002] The quality of seedling emergence in agricultural planting is closely related to the seed screening process in the early stages. In agricultural production, seeds are the foundation for crop emergence, growth, and development. Screening removes shriveled, insect-damaged, moldy seeds, as well as impurities such as stones and straw fragments, improving the overall purity and uniformity of the seeds. High-quality seeds not only reduce the probability of missing seedlings and broken rows after sowing, reducing the workload of thinning and replanting in the field, but also promote uniform seedling emergence, ensuring consistent plant growth, facilitating field water and fertilizer management and pest and disease control, and ultimately increasing crop yield. In agricultural seed screening, grain seeds such as rice, wheat, and corn, as well as small oilseed seeds such as rapeseed and sesame, and some vegetable seeds, are prone to forming water films and clumping together when they are freshly harvested and have a high moisture content. These clumps of seeds are difficult to disperse and easily stick to and clog the screen. This problem is particularly prominent in the rainy harvest season in the south, when seeds do not have enough time to dry before cleaning. Conventional screening devices are mostly designed for sorting seeds that have been fully dried. When screening and processing damp seeds directly, the clumped seeds are difficult to effectively separate into layers, and the screen surface is easily clogged, affecting the screening process. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that existing seed screening devices suffer from adhesion and clumping due to the formation of water films between moist seeds, which affects the screening effect of the device. Therefore, this invention proposes a seed screening device for agricultural planting.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A seed screening device for agricultural planting includes a housing. Rubber teeth are fixedly connected to the outer surface of a set of rollers inside the housing. A set of oscillating motors is fixedly connected to the inner wall of each roller. The output ends of two motors fixedly connected to the outer surface of the housing are fixedly connected to the middle roller. A compound oscillation mechanism is provided below the rollers. The composite oscillation mechanism includes a piston cylinder fixedly connected to the inner wall of the casing, a fine screen slidably connected to the upper end of a piston rod slidably connected to the inner wall of the piston cylinder, a telescopic spring fixedly connected to the bottom surface of the piston rod, an eccentric wheel abutting against the upper surface of the fine screen and fixedly connected to the outer surface of the motor, and a pair of arc-shaped protrusions abutting against the outer surface of the fine screen inside the casing.

[0005] As a further description of the above technical solution: The transmission wheel fixedly connected to the outer surface of each pair of rollers is connected by belt drive, and the two ends of the two outer rollers are rotatably connected to the inner wall of the machine box.

[0006] As a further description of the above technical solution: The bottom end of the telescopic spring is fixedly connected to the inner bottom wall of the piston cylinder, and the piston rod is rotatably connected to the sliding connection between the fine screen and the piston rod.

[0007] As a further description of the above technical solution: The bottom surface of the piston cylinder is fixedly connected to the interior of the protective cylinder, which is equipped with a heating wire. The outer surface of the chassis is fixedly connected to the first check valve, which is connected to the interior of the protective cylinder. The outer surface of the piston cylinder is fixedly connected to a second check valve.

[0008] As a further description of the above technical solution: The coarse screen set on the upper part of the roller abuts against the outer surface of the eccentric wheel, and the inner wall of the square tube fixedly connected to the inner wall of the machine box is slidably connected with a T-shaped rod.

[0009] As a further description of the above technical solution: The compression spring fixedly connected to the top wall of the square tube is fixedly connected to the T-shaped rod. The coarse screen and the eccentric wheel abutting point and the fine screen and the eccentric wheel abutting point are both rotatably connected to a second ball bearing.

[0010] As a further description of the above technical solution: A third ball bearing is rotatably connected at the contact point between the fine screen and the arc-shaped protrusion. The first cleaning door plate, which is snapped onto the back of the chassis, extends into the interior of the chassis. The arc-shaped protrusion on one side is fixedly connected to the inner wall of the chassis, and the arc-shaped protrusion on the other side is fixedly connected to the first cleaning door plate. Two rubber layers fixedly connected to the upper surface of the fine screen are respectively fixedly connected to the inner wall of the chassis and the outer surface of the first cleaning door plate.

[0011] As a further description of the above technical solution: The upper surface of the chassis is fixedly connected to a feed funnel, and the second cleaning door plate snapped onto the back of the chassis extends into the interior of the chassis. The lower part of the outer surface of the chassis is provided with a discharge port.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In this invention, the operation of the motor drives the fine screen that is in contact with it to move up and down reciprocally. The rotation of the motor drives a set of rollers and rubber teeth to rotate synchronously, and the oscillating motor drives the rollers and rubber teeth to vibrate, which increases the effect of breaking up damp and clumped seeds. The fine screen is provided with arc-shaped protrusions, so that the fine screen that moves up and down in the longitudinal direction also moves left and right in the transverse direction in a synchronous manner. The device reduces the impact of clumping between damp seeds and adhesion to the screen surface on screening through the combined vibration of the longitudinal and transverse directions, thereby improving the screening effect of the device on damp seeds. Attached Figure Description

[0013] Figure 1 This is a front view cross-sectional structural diagram of a seed screening device for agricultural planting proposed in this invention. Figure 2 This is a front view cross-sectional structural diagram of the casing of a seed screening device for agricultural planting proposed in this invention; Figure 3 This is a schematic diagram of the right-side cross-sectional structure of a seed screening device for agricultural planting proposed in this invention. Figure 4 This is a top view cross-sectional structural diagram of a seed screening device for agricultural planting proposed in this invention; Figure 5 This is a top view schematic diagram of the fine screen structure of a seed screening device for agricultural planting proposed in this invention. Figure 6 This is a front view cross-sectional diagram of the piston cylinder of a seed screening device for agricultural planting proposed in this invention.

[0014] Legend: 1. Chassis; 2. Roller; 3. Rubber teeth; 4. Vibrating motor; 5. Motor; 6. Compound vibration mechanism; 7. Piston cylinder; 8. Piston rod; 9. Fine screen; 10. Telescopic spring; 11. Eccentric wheel; 12. Arc-shaped protrusion; 13. Transmission wheel; 14. Belt; 15. First ball bearing; 16. Protective cylinder; 17. Heating wire; 18. First check valve; 19. Second check valve; 20. Coarse screen; 21. Square cylinder; 22. T-shaped rod; 23. Compression spring; 24. Second ball bearing; 25. Third ball bearing; 26. Rubber layer; 27. First cleaning door panel; 28. Feed funnel; 29. ​​Second cleaning door panel; 30. Discharge port. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-6 This invention provides a technical solution: a seed screening device for agricultural planting, including a housing 1. A set of rollers 2 inside the housing 1 are all fixedly connected to the outer surface with rubber teeth 3. The rubber teeth 3, relying on the elasticity of their material, can apply appropriate agitation, combing, and vibration to the seed clumps when they come into contact with moist, clump-like seeds. This causes the wet seeds, which are adhered together by a water film, to loosen and disperse, breaking the water film adhesion between the particles and reducing seed clumping. Simultaneously, the rubber teeth 3 can reduce the impact of hard tooth tips on the seed surface during contact with the seed particles, mitigating scratches and damage to the seed coat and reducing the seed damage rate. They can also intermittently scrape and guide the moist seeds adhering to the screen surface. A feeding funnel 28 is fixedly connected to the upper surface of the housing 1. The feeding funnel 28 facilitates the feeding of seeds and... The straw is fed in, and the second cleaning door plate 29, which is snapped onto the back of the machine box 1, extends into the interior of the machine box 1. The second cleaning door plate 29 is designed to facilitate the cleaning of impurities on the upper surface of the coarse screen 20 by disassembling the second cleaning door plate 29. The lower part of the outer surface of the machine box 1 is provided with a discharge port 30, which facilitates the discharge of the screened seeds. The transmission wheels 13 fixedly connected to the outer surface of each pair of rollers 2 are connected by a belt 14. The two ends of the two outer rollers 2 are rotatably connected to the inner wall of the machine box 1. The cooperation of the transmission wheels 13 and the belt 14 makes a set of rollers 2 rotate synchronously, which increases the dispersion effect on the moist seeds. A set of oscillating motors 4 are fixedly connected to the inner wall of each roller 2. The output ends of the two motors 5 fixedly connected to the outer surface of the machine box 1 are fixedly connected to the middle roller 2. A compound oscillation mechanism 6 is provided below the roller 2. The compound oscillation mechanism 6 includes a piston cylinder 7 fixedly connected to the inner wall of the housing 1. A fine screen 9 is slidably connected to the upper end of a piston rod 8 slidably connected to the inner wall of the piston cylinder 7. The fine screen 9 is located below a set of rollers 2. A first ball bearing 15 is rotatably connected at the slidable connection between the piston rod 8 and the fine screen 9. The first ball bearing 15 reduces the friction between the piston rod 8 and the fine screen 9. A telescopic spring 10 is fixedly connected to the bottom surface of the piston rod 8. The bottom end of the telescopic spring 10 is fixedly connected to the inner bottom wall of the piston cylinder 7. Figure 1 and Figure 6 All the telescopic springs 10 are in a compressed state. The telescopic springs 10 provide a reset effect for the piston rod 8. The bottom surface of the piston cylinder 7 is fixedly connected to the protective cylinder 16, which is equipped with a heating wire 17. The first check valve 18 is fixedly connected to the outer surface of the machine box 1 and is connected to the inside of the protective cylinder 16. The outer surface of the piston cylinder 7 is fixedly connected to the second check valve 19. The air outlet of the second check valve 19 is inclined upward, that is, inclined towards the bottom surface of the fine screen 9. The inlet of the first check valve 18 is connected to the outside, and the outlet of the first check valve 18 is connected to the inlet of the second check valve 19 via the heating wire 17. The outlet of the second check valve 19 is connected to the inside of the housing 1, ensuring the airflow direction inside the piston cylinder 7. The check valve, also known as a one-way valve, is mainly used in media pipelines to achieve one-way flow. When the medium flows in the forward direction, the pressure generated by the medium overcomes the reset spring force of the valve core inside the check valve or its own weight, pushing the valve core away from the valve seat, so that the valve port is in the open state, and the medium can pass smoothly through the valve cavity. Once the medium shows a reverse flow trend, the pressure of the backflowing medium will push the valve core to press tightly against the valve. The valve is sealed on the seat, blocking the fluid passage and quickly closing the valve port, thereby preventing the medium from flowing back. This prevents the medium inside the pipeline from flowing back and avoids the upstream equipment from being impacted. No additional drive components are required. The valve can be opened and closed automatically by relying on the fluid pressure of the medium itself. That is, the external air flows into the inside of the machine box 1 through the first check valve 18, the protective cylinder 16, the heating wire 17, the piston cylinder 7 and the second check valve 19. The heating wire 17 heats the air flowing through it. The hot air is sprayed out through the second check valve 19, which has a certain drying effect on the moist seeds inside the machine box 1 and on the upper surface of the fine screen 9, and reduces the adsorption force of the water film between the seeds.

[0017] The eccentric wheel 11, which abuts against the upper surface of the fine screen 9, is fixedly connected to the outer surface of the motor 5. Inside the housing 1, a pair of arc-shaped protrusions 12 abut against the outer surface of the fine screen 9. A third ball bearing 25 is rotatably connected at the abutment point between the fine screen 9 and the arc-shaped protrusions 12. The third ball bearing 25 reduces the wear of the fine screen 9 abutting against the arc-shaped protrusions 12, extending the service life of the device. The arc-shaped protrusions 12 cause the fine screen 9, which moves vertically up and down, to move horizontally left and right simultaneously. While oscillating vertically, it is superimposed with a small horizontal reciprocating rubbing motion, causing relative misalignment, friction, and slippage between the moist seed particles, shearing and breaking the water film tension between the particles. This process breaks up clumps of wet seeds and reduces adhesion between seeds and the upper surface of the fine sieve 9. The first cleaning door plate 27, which is snapped onto the back of the housing 1, extends into the interior of the housing 1. One side of the arc-shaped protrusion 12 is fixedly connected to the inner wall of the housing 1, and the other side of the arc-shaped protrusion 12 is fixedly connected to the first cleaning door plate 27. Two rubber layers 26, which are fixedly connected to the upper surface of the fine sieve 9, are fixedly connected to the inner side wall of the housing 1 and the outer surface of the first cleaning door plate 27, respectively. The rubber layers 26 prevent seeds from falling into the inner bottom wall of the housing 1 through the gap between the fine sieve 9 and the housing 1. The first cleaning door plate 27 is designed to facilitate the removal and cleaning of impurities on the upper surface of the fine sieve 9.

[0018] A coarse screen 20 mounted on the upper part of roller 2 abuts against the outer surface of eccentric wheel 11. The coarse screen 20 coarsely screens seeds, straw, etc. A T-shaped rod 22 is slidably connected to the inner wall of square cylinder 21 fixedly connected to the inner wall of the machine housing 1. A compression spring 23 fixedly connected to the top wall of square cylinder 21 is fixedly connected to the T-shaped rod 22. The compression spring 23 provides a buffering and resetting effect for the T-shaped rod 22. Figure 1 The compression spring 23 is in its natural state. The contact points between the coarse screen 20 and the eccentric wheel 11 and between the fine screen 9 and the eccentric wheel 11 are rotatably connected to the second ball bearing 24. The setting of the second ball bearing 24 reduces the friction between the eccentric wheel 11 and the contact points between the coarse screen 20 and the fine screen 9.

[0019] The seeds and straw to be screened are poured into the machine housing 1 through the feed funnel 28. The operation of the motor 5 drives the fine screen 9 and coarse screen 20, which are in contact with it, to move up and down reciprocally. The coarse screen 20 coarsely screens larger impurities. Subsequently, smaller impurities and seeds fall onto the outer surface of the roller 2 and rubber teeth 3. With the cooperation of the transmission wheel 13 and belt 14, the rotation of the motor 5 drives a set of rollers 2 and rubber teeth 3 to rotate synchronously. With the setting of the oscillating motor 4, the rollers 2 and rubber teeth 3 generate a certain vibration, which increases the effect of breaking up moist and clumped seeds. The seeds flowing through the rollers 2 and rubber teeth 3 fall onto the upper surface of the fine screen 9. Fine sieving is performed during the reciprocating up-and-down movement of the fine screen 9. During this process, the fine screen 9 is equipped with arc-shaped protrusions 12, which cause the fine screen 9, which moves vertically up and down, to move horizontally left and right simultaneously. While the vertical vibration is superimposed, a small horizontal reciprocating rubbing motion is added, causing relative misalignment and frictional slippage between the seed particles. This shears and breaks down the water film tension between the particles, breaking up the clusters of wet seeds. At the same time, it reduces the adhesion between the seeds and the upper surface of the fine screen 9. Through the combined vertical and horizontal vibration, the device reduces the impact of the clumping of wet seeds and their adhesion to the screen surface on the sieving process, thereby improving the sieving effect of the device on wet seeds.

[0020] Working Principle: During use, connect the vibrating motor 4, motor 5, and heating wire 17 to the power supply. Pour the seeds and straw to be screened into the machine casing 1 through the feed funnel 28. The operation of motor 5 drives the fine screen 9 and coarse screen 20, which are in contact with it, to move up and down reciprocally. The coarse screen 20 coarsely screens larger impurities. Subsequently, smaller impurities and seeds fall onto the outer surface of roller 2 and rubber teeth 3. With the cooperation of the transmission wheel 13 and belt 14, the rotation of motor 5 drives a set of rollers 2 and rubber teeth 3 to rotate synchronously. The vibrating motor 4 causes rollers 2 and rubber teeth 3 to vibrate, increasing the effect of breaking up damp, clumped seeds. Seeds flowing through rollers 2 and rubber teeth 3 fall onto the upper surface of the fine screen 9, where fine screening is performed during the up-and-down reciprocating movement of the fine screen 9. During this process, the arc-shaped protrusions 12 on the fine screen 9... The fine screen 9, which moves vertically up and down, also moves horizontally left and right simultaneously. While oscillating vertically, it is superimposed with a small horizontal rubbing motion, causing relative displacement and friction between the seed particles. This shears and breaks down the water film tension between the particles, breaking up the clustered wet seed clumps. At the same time, it reduces the adhesion between the seeds and the upper surface of the fine screen 9. Through the combined vertical and horizontal vibration, the device reduces the impact of clumping between wet seeds and adhesion to the screen surface on the screening, thereby improving the screening effect of the device on wet seeds. As the piston rod 8 moves up and down inside the piston cylinder 7, external air flows into the interior of the housing 1 through the heating wire 17. The heating wire 17 heats the air flowing through it. The hot air is ejected through the second check valve 19, which has a certain drying effect on the wet seeds inside the housing 1 and on the upper surface of the fine screen 9, reducing the adhesion of the water film between the seeds.

[0021] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A seed screening device for agricultural planting, comprising a housing, characterized in that, The outer surface of a set of rollers inside the chassis is fixedly connected with rubber teeth, and a set of oscillating motors is fixedly connected to the inner wall of each roller. The output ends of the two motors fixedly connected to the outer surface of the chassis are fixedly connected to the middle roller. A compound oscillation mechanism is provided below the rollers. The composite oscillation mechanism includes a piston cylinder fixedly connected to the inner wall of the casing, a fine screen slidably connected to the upper end of a piston rod slidably connected to the inner wall of the piston cylinder, a telescopic spring fixedly connected to the bottom surface of the piston rod, an eccentric wheel abutting against the upper surface of the fine screen and fixedly connected to the outer surface of the motor, and a pair of arc-shaped protrusions abutting against the outer surface of the fine screen inside the casing.

2. The seed screening device for agricultural planting according to claim 1, characterized in that, The transmission wheel fixedly connected to the outer surface of each pair of rollers is connected by belt drive, and the two ends of the outer rollers are rotatably connected to the inner wall of the machine box.

3. The seed screening device for agricultural planting according to claim 1, characterized in that, The bottom end of the telescopic spring is fixedly connected to the inner bottom wall of the piston cylinder, and the piston rod is rotatably connected to the sliding connection between the fine screen and the piston rod.

4. The seed screening device for agricultural planting according to claim 1, characterized in that, The bottom surface of the piston cylinder is fixedly connected to the interior of the protective cylinder, which is equipped with a heating wire. The outer surface of the chassis is fixedly connected to the first check valve, which is connected to the interior of the protective cylinder. The outer surface of the piston cylinder is fixedly connected to a second check valve.

5. The seed screening device for agricultural planting according to claim 1, characterized in that, The coarse screen set on the upper part of the roller abuts against the outer surface of the eccentric wheel, and the inner wall of the square tube fixedly connected to the inner wall of the machine box is slidably connected with a T-shaped rod.

6. The seed screening device for agricultural planting according to claim 5, characterized in that, The compression spring fixedly connected to the inner top wall of the square tube is fixedly connected to the T-shaped rod. The coarse screen and the eccentric wheel abutting point and the fine screen and the eccentric wheel abutting point are both rotatably connected to a second ball bearing.

7. The seed screening device for agricultural planting according to claim 1, characterized in that, A third ball bearing is rotatably connected at the contact point between the fine screen and the arc-shaped protrusion. The first cleaning door plate, which is snapped onto the back of the chassis, extends into the interior of the chassis. The arc-shaped protrusion on one side is fixedly connected to the inner wall of the chassis, and the arc-shaped protrusion on the other side is fixedly connected to the first cleaning door plate. Two rubber layers fixedly connected to the upper surface of the fine screen are respectively fixedly connected to the inner wall of the chassis and the outer surface of the first cleaning door plate.

8. The seed screening device for agricultural planting according to claim 1, characterized in that, The upper surface of the chassis is fixedly connected to a feed funnel, and the second cleaning door plate snapped onto the back of the chassis extends into the interior of the chassis. The lower part of the outer surface of the chassis is provided with a discharge port.

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