Multistage screening device for rice seeds
By designing a multi-stage rice seed screening device with internal and external screening structures and a vibration mechanism, the problem of screen clogging was solved, and efficient screening of rice seeds and improvement of sowing quality were achieved.
Patent Information
- Application Number
- CN202422223249.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The existing rice seed screening device is prone to clogging the screen with large rice seeds during screening operation, resulting in reduced screening efficiency and deterioration in seeding quality.
A multi-stage screening device for rice seeds was designed, which adopted an internal and external screening structure. The inner and outer screens were used in conjunction with each other. The transmission mechanism and vibration mechanism driven by a motor, the rotation and vibration of the inner and outer screens, and the material-pickling mechanism were used to clean the rice seeds stuck in the screen to keep the screening process smooth.
It effectively prevents screen clogging, improves screening efficiency, ensures the screening quality of rice seeds, and improves sowing uniformity and crop growth quality.
Smart Images
Figure CN223337756U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rice seed screening, in particular to a multi-stage rice seed screening device. Background Art
[0002] In the process of rice cultivation, screening rice seeds is a crucial step. Through careful screening work, it can be ensured that the seeds that are finally sown are healthy, vigorous and have a high germination rate. This work is not only to increase the yield of crops, but also to ensure the quality of crops. The screening process usually involves removing seeds that are incomplete, damaged or affected by pests and diseases. If these seeds are used for sowing, not only may they not grow normally, but they may also have an adverse effect on the healthy plants around them. An important purpose of screening rice seeds is to improve the consistency of seeds. Improved consistency means that the rice plants grown in the field will be more uniform in height, maturity, etc., which is conducive to subsequent field management and harvesting operations.
[0003] Existing rice seed screening devices face a common problem during screening operations, that is, the screen is easily clogged by rice seeds that cannot pass through. The occurrence of this clogging phenomenon will significantly reduce the screening efficiency, resulting in an incomplete subsequent screening process. When the screen aperture is blocked by larger rice seeds, normal rice seeds will have difficulty passing through smoothly, which not only slows down the screening speed, but may also cause insufficiently screened seeds to mix with qualified seeds, thereby affecting the sowing quality and crop growth. How to invent a multi-stage rice seed screening device to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content
[0004] In order to make up for the above deficiencies, the utility model provides a multi-stage screening device for rice seeds, which aims to improve the problem that the screen of the rice seed screening device is easily blocked during the screening operation.
[0005] The utility model is achieved in that:
[0006] The utility model provides a multi-stage screening device for rice seeds, comprising a base, a plurality of upright frames fixedly connected to the top of the base, a plurality of support plates fixedly connected to the tops of the upright frames, a motor, a screening cover, and a plurality of first brackets fixedly connected to the side walls of the plurality of first brackets, a first support plate fixedly connected to the outer side walls of the first support plate fixedly connected to a material feeding trough, a material receiving box fixedly connected to the top of the upright frames, a plurality of slots being arranged in the material receiving box, an end of the support plate fixedly connected to the second bracket, a first guide plate and a second guide plate fixedly connected to the side walls of the second bracket, an outer screen and an inner screen being arranged inside the screening cover, the outer screen and the inner screen being both inclined, and a material shifting mechanism, a transmission mechanism, and a vibration mechanism being arranged inside the screening cover.
[0007] Preferably, a first discharge port is provided at the bottom of the screening outer cover, and the first guide plate and the second guide plate are respectively provided corresponding to the inner screen and the outer screen.
[0008] Preferably, a plurality of outer screen bars are equidistantly arranged on the outer screen, a plurality of inner screen bars are equidistantly arranged on the inner screen, the gap between two adjacent inner screen bars is larger than the gap between two adjacent outer screen bars, and a plurality of shift bars are fixedly connected to the outer side wall of the inner screen, and the plurality of shift bars are equidistantly arranged on the circumference.
[0009] Preferably, the material-dipping mechanism includes a material-dipping shaft rotatably connected to the first support plate, and a plurality of dipping plates are fixedly connected to the outer side wall of the material-dipping shaft, and the edges of the dipping plates are arranged in a curved shape.
[0010] Preferably, the transmission mechanism includes a driving gear fixedly sleeved on the output shaft of the motor, a driven gear fixedly sleeved on the outer side wall of the material-digging shaft, and a small gear rotatably connected to the first support plate.
[0011] Preferably, the first support plate is fixedly connected to the second support plate through a third bracket, the second support plate is rotatably connected to the inner screen, the first support plate is rotatably connected to the outer screen, the driving gear is meshed with the driven gear, the driving gear is meshed with the inner screen, and the pinion is meshed with both the inner screen and the outer screen.
[0012] Preferably, the vibration mechanism includes a first slide bar and a second slide bar fixedly connected to the side wall of the first support plate, the outer walls of the first slide bar and the second slide bar are slidingly provided with a perforated hollow plate, and the second slide bar is fixedly connected to a plurality of tension springs, the tension springs penetrate the first slide bar and are fixedly connected to the inner wall of the hollow plate, and the hollow plate is fixedly connected with a plurality of springs, and the ends of the plurality of springs are fixedly connected with hammers, and the hammers are slidingly provided with the hollow plate.
[0013] The beneficial effects of the utility model are as follows: the output shaft of the motor drives the driving gear, the inner screen, the pinion and the outer screen to rotate, and the inner screen and the outer screen cooperate to screen the rice seeds; when the inner screen rotates, the plurality of shift bars are driven to make a circular motion, and the shift bars shift the hollow plate to move, and the hollow plate quickly rebounds due to the pulling of a plurality of tension springs and hits the shift bars, so that the inner screen vibrates, and the rice seeds stuck between the inner screen bars are cleared, so that the inner screen remains unobstructed; when the hollow plate rebounds and hits the shift bars, due to the effect of inertia, the hammer continues to move, hits the outer screen to make it vibrate, and allows the rice seeds stuck on the outer screen to fall due to the vibration, so that the screening process remains unobstructed. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0015] Figure 1 This is a schematic diagram from a first perspective of the three-dimensional structure of a multi-stage rice seed screening device provided by an embodiment of the present utility model;
[0016] Figure 2 This is a schematic diagram from a second perspective of the three-dimensional structure of a multi-stage rice seed screening device provided by an embodiment of the present utility model;
[0017] Figure 3 This is a schematic diagram of the inner screen structure of a multi-stage rice seed screening device provided by an embodiment of the present utility model;
[0018] Figure 4 This is a schematic diagram of the outer screen structure of a multi-stage rice seed screening device provided by an embodiment of the present utility model;
[0019] Figure 5 This is a schematic diagram of a transmission mechanism of a multi-stage rice seed screening device provided by an embodiment of the present utility model;
[0020] Figure 6 yes Figure 5 Enlarged view of point A in the middle.
[0021] In the figure: 1. base; 2. stand; 3. support plate; 4. motor; 5. first bracket; 6. screening cover; 7. first support plate; 8. feed chute; 9. second bracket; 10. first guide plate; 11. second guide plate; 12. outer screen; 13. inner screen; 14. outer screen bars; 15. second support plate; 16. third bracket; 17. driving gear; 18. driven gear; 19. pinion; 20. shift bar; 21. hollow plate; 22. first slide bar; 23. second slide bar; 24. tension spring; 25. spring; 26. hammer; 27. material receiving box; 28. inner screen bars; 29. shift shaft; 30. shift plate. DETAILED DESCRIPTION
[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0023] Example, refer to Figures 1-6 A multi-stage screening device for rice seeds includes a base 1, a plurality of vertical frames 2 are fixedly connected to the top of the base 1, a plurality of vertical frames 2 are fixedly connected to the top of the support plates 3, a motor 4 is fixedly connected to the top of the support plates 3, a screening cover 6, a plurality of first brackets 5, a first support plate 7 is fixedly connected to the side walls of the plurality of first brackets 5, a feed trough 8 is fixedly connected to the outer wall of the first support plate 7, a material receiving box 27 is fixedly connected to the top of the vertical frame 2, a plurality of slots are arranged in the material receiving box 27, a second bracket 9 is fixedly connected to the end of the support plate 3, a first guide plate 10 and a second guide plate 11 are fixedly connected to the side walls of the second bracket 9, and a screening cover 6 is provided with an inner portion thereof. There are an outer screen 12 and an inner screen 13, both of which are inclined. A material-pickup mechanism, a transmission mechanism, and a vibration mechanism are provided inside the screening outer cover 6. A first discharge port is provided at the bottom of the screening outer cover 6. A first guide plate 10 and a second guide plate 11 are respectively provided corresponding to the inner screen 13 and the outer screen 12. A plurality of outer screen bars 14 are equidistantly provided on the outer screen 12, and a plurality of inner screen bars 28 are equidistantly provided on the inner screen 13. The gap between two adjacent inner screen bars 28 is greater than the gap between two adjacent outer screen bars 14. A plurality of paddle bars 20 are fixedly connected to the outer side wall of the inner screen 13, and the plurality of paddle bars 20 are equidistantly provided on the circumference.
[0024] The material-digging mechanism includes a dipping shaft 29 rotatably connected to the first support plate 7, and a plurality of dipping plates 30 are fixedly connected to the outer wall of the dipping shaft 29, and the edges of the dipping plates 30 are arranged in a curved shape; the transmission mechanism includes a driving gear 17 fixedly sleeved on the output shaft of the motor 4, and a driven gear 18 is fixedly sleeved on the outer wall of the dipping shaft 29, and a pinion 19 is rotatably connected to the first support plate 7; the first support plate 7 is fixedly connected to the second support plate 15 through the third bracket 16, the second support plate 15 is rotatably connected to the inner screen 13, the first support plate 7 is rotatably connected to the outer screen 12, the driving gear 17 is meshed with the driven gear 18, the driving gear 17 is meshed with the inner screen 13, and the pinion 19 is meshed with both the inner screen 13 and the outer screen 12;
[0025] The vibration mechanism includes a first slide bar 22 and a second slide bar 23 fixedly connected to the side wall of the first support plate 7, and the outer walls of the first slide bar 22 and the second slide bar 23 are slidably provided with a perforated hollow plate 21, and a plurality of tension springs 24 are fixedly connected to the second slide bar 23, and the tension springs 24 penetrate the first slide bar 22 and are fixedly connected to the inner wall of the hollow plate 21, and a plurality of springs 25 are fixedly connected to the hollow plate 21, and the ends of the plurality of springs 25 are fixedly connected to a hammer 26, and the hammer 26 is slidably arranged with the hollow plate 21; the output shaft of the motor 4 rotates to drive the driving gear 17, the inner screen 13, the pinion 19, and the outer screen 1 2 rotates, and the inner screen 13 and the outer screen 12 cooperate to screen the rice seeds; while the inner screen 13 rotates, it drives the multiple shifting bars 20 to make a circular motion, and the shifting bars 20 shift the hollow plate 21 to move. The hollow plate 21 rebounds quickly due to the pull of the multiple tension springs 24 and hits the shifting bars 20, causing the inner screen 13 to vibrate, clearing the rice seeds stuck between the inner screen bars 28, so that the inner screen 13 remains unobstructed; while the hollow plate 21 rebounds and hits the shifting bars 20, due to the effect of inertia, the hammer 26 continues to move, hitting the outer screen 12 to vibrate it, allowing the rice seeds stuck on the outer screen 12 to fall due to the vibration, so as to keep the screening process unobstructed.
[0026] The working principle of the multi-stage screening device for rice seeds is as follows: the rice seeds to be screened are placed into the inner sieve 13 from the feeding trough 8, the motor 4 is started, the output shaft of the motor 4 rotates to drive the driving gear 17, which drives the inner sieve 13 to rotate, and the inner sieve 13 drives the outer sieve 12 to rotate through the pinion 19. The rice seeds roll in the inner sieve 13 under the action of centrifugal force and gravity, and the full rice seed particles cannot pass through the inner sieve bars 28. The normal rice seeds and the shriveled rice seeds pass through the gaps between the inner sieve bars 28 to reach the outer sieve 12. The shriveled rice seeds pass through the gaps between the outer sieve bars 14 and fall into the receiving box 27 below, and the normal rice seeds remain in the outer sieve 12. Due to the inclined arrangement of the inner sieve 13 and the outer sieve 12, the rice seed particles remaining in the inner sieve 13 and the outer sieve 12 gradually move downward due to gravity and fall into different slots in the receiving box 27. At the same time as the driving gear 17 rotates, the rice seeds are tumbled in the inner sieve 13. When the inner screen 13 rotates, it drives the driven gear 18 to rotate, driving the multiple paddles 30 on the paddle shaft 29 to make a circular motion. The paddles 30 paddle and disperse the rice seeds in the inner screen 13, so that the rice seeds accumulated in the inner screen 13 are screened more quickly; while the inner screen 13 rotates, it drives the multiple paddles 20 to make a circular motion, and the paddles 20 paddle and move the hollow plates 21. When the paddles 20 move to separate from the hollow plates 21, the hollow plates 21 rebound quickly due to the pulling of the multiple tension springs 24 and hit the next paddle 20, causing the inner screen 13 to vibrate, cleaning the rice seeds stuck between the inner screen bars 28, so that the inner screen 13 remains unobstructed. When the hollow plate 21 rebounds and hits the paddle 20, due to the effect of inertia, the hammer 26 continues to move, hitting the outer screen 12 to vibrate, allowing the rice seeds stuck on the outer screen 12 to fall due to the vibration, keeping the screening process unobstructed.
[0027] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.
[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A rice seed multi-stage screening device, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a plurality of vertical frames (2), the tops of the plurality of vertical frames (2) are fixedly connected to support plates (3), the tops of the support plates (3) are fixedly connected to a motor (4), a screening cover (6), and a plurality of first brackets (5), the side walls of the plurality of first brackets (5) are fixedly connected to a first support plate (7), the outer side walls of the first support plate (7) are fixedly connected to a material feed trough (8), the top of the vertical frame (2) is fixedly connected to a material receiving box (27), a plurality of slots are provided in the material receiving box (27), the end of the support plate (3) is fixedly connected to a second bracket (9), the side walls of the second bracket (9) are fixedly connected to a first guide plate (10) and a second guide plate (11), an outer screen (12) and an inner screen (13) are provided inside the screening cover (6), the outer screen (12) and the inner screen (13) are both inclined, and a material shifting mechanism, a transmission mechanism, and a vibration mechanism are provided inside the screening cover (6).
2. A rice seed multi-stage screening device according to claim 1, characterized in that: A first discharge port is provided at the bottom of the screening outer cover (6), and the first guide plate (10) and the second guide plate (11) are respectively provided corresponding to the inner screen (13) and the outer screen (12).
3. The rice seed multi-stage screening device according to claim 1, characterized in that: A plurality of outer screen bars (14) are equidistantly arranged on the outer screen (12), a plurality of inner screen bars (28) are equidistantly arranged on the inner screen (13), a gap between two adjacent inner screen bars (28) is larger than a gap between two adjacent outer screen bars (14), and a plurality of shift bars (20) are fixedly connected to the outer side wall of the inner screen (13), and the plurality of shift bars (20) are equidistantly arranged on the circumference.
4. The rice seed multi-stage screening device according to claim 1, characterized in that: The material shifting mechanism comprises a material shifting shaft (29) rotatably connected to the first support plate (7), and a plurality of shifting plates (30) are fixedly connected to the outer side wall of the material shifting shaft (29), and the edges of the shifting plates (30) are arranged in a curved shape.
5. The rice seed multi-stage screening device according to claim 4, characterized in that: The transmission mechanism includes a driving gear (17) fixedly sleeved on the output shaft of the motor (4), a driven gear (18) fixedly sleeved on the outer wall of the material-digging shaft (29), and a small gear (19) rotatably connected to the first support plate (7).
6. The rice seed multi-stage screening device according to claim 5, characterized in that: The first support plate (7) is fixedly connected to the second support plate (15) via a third bracket (16); the second support plate (15) is rotatably connected to the inner screen (13); the first support plate (7) is rotatably connected to the outer screen (12); the driving gear (17) is meshed with the driven gear (18); the driving gear (17) is meshed with the inner screen (13); and the pinion gear (19) is meshed with both the inner screen (13) and the outer screen (12).
7. The rice seed multi-stage screening device according to claim 1, characterized in that: The vibration mechanism comprises a first slide bar (22) and a second slide bar (23) fixedly connected to the side wall of the first support plate (7); the outer walls of the first slide bar (22) and the second slide bar (23) are slidably provided with a perforated hollow plate (21); a plurality of tension springs (24) are fixedly connected to the second slide bar (23); the tension springs (24) penetrate the first slide bar (22) and are fixedly connected to the inner wall of the hollow plate (21); a plurality of springs (25) are fixedly connected inside the hollow plate (21); the ends of the plurality of springs (25) are fixedly connected with a hammer (26); the hammer (26) is slidably provided with the hollow plate (21).