A brown rice screening and separating device
By using a combination design of flexible screen and drive roller in the brown rice screening equipment, the problem of broken rice getting stuck is solved by utilizing gravity and guide plate structure, and a long-term stable screening effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIANGYANG FENGSHENGJIE GRAIN & OIL CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-05
AI Technical Summary
In existing technologies, after prolonged operation, broken rice tends to get stuck in the screen holes of brown rice screening equipment, affecting the screening effect.
The screen uses a flexible screen and is driven by a drive roller to rotate continuously. Gravity causes the broken rice stuck in the screen holes to fall down when it rotates to the bottom. Combined with the design of inclined plates and guide plates, the screening effect is ensured.
It effectively avoids screen hole clogging, ensures the long-term normal operation of the screening equipment, and improves screening efficiency.
Smart Images
Figure CN224321783U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brown rice screening technology, specifically a brown rice screening and separation device. Background Technology
[0002] Brown rice is whole grain rice obtained by removing the husk from paddy rice with little or no processing. It consists of three main parts: bran, germ, and endosperm. Compared with white rice, brown rice retains more of the nutrients of paddy rice. After hulling, brown rice will contain broken rice, so it needs to be sieved to remove these broken rice grains mixed in with the brown rice.
[0003] Existing technology uses sieves to separate brown rice, but broken rice often includes particles with a mesh size similar to the sieve openings. These broken rice particles easily get stuck in the sieve mesh, affecting the sieving efficiency after prolonged use. Therefore, we propose a brown rice screening and separation device. Utility Model Content
[0004] The purpose of this invention is to provide a brown rice screening and separation device. By setting a flexible screen that is driven to rotate continuously inside the screen box, the flexible screen that was originally in the upper layer will rotate to the lower layer after screening the brown rice. This is beneficial for the broken rice stuck in the screen holes to fall off under the action of gravity when the flexible screen rotates to the lower layer, thus ensuring the normal screening effect of the flexible screen during long-term operation and solving the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a brown rice screening and separation device, comprising a screen box and a flexible screen, wherein the flexible screen is annular and placed inside the screen box, and a drive roller and three guide rollers are longitudinally rotatably installed inside the screen box on the inner side of the flexible screen. The drive roller and guide rollers open the flexible screen from the inside and tilt the upper surface of the flexible screen. The drive roller is connected to a motor installed on the outer surface of the screen box at its front end. A feed inlet is provided on the upper surface of the screen box at the higher end of the flexible screen, and a first row of impurity outlets is provided at the bottom of the screen box. An inclined plate with front and rear inclinations is fixed on the inner wall surface of the screen box on the inner side of the flexible screen, the height of the front end of the inclined plate is less than the height of its rear end, and a second row of impurity outlets is provided on the surface of the screen box above the front end of the inclined plate. A discharge outlet is provided on the surface of the screen box on the side of the guide roller at the higher position.
[0006] By adopting the above technical solution, brown rice enters the sieve box and is sieved by a flexible screen. The flexible screen is in a rotating and circulating state. When it rotates to the lower position, the broken rice stuck in the mesh can fall down and be cleaned by gravity, thus avoiding the broken rice stuck in the mesh from affecting the sieving effect.
[0007] Optionally, a guide plate is fixedly inclined inside the screen box at the discharge port, with the higher end of the guide plate close to the surface of the flexible screen.
[0008] By adopting the above technical solution, the guide plate can guide the brown rice rolling off the surface of the flexible screen so that it is discharged from the outlet.
[0009] Optionally, a guide cover is welded and fixed to the outer surface of the screen box at the discharge port, and the discharge port is located inside the guide cover.
[0010] By adopting the above technical solution, the guide cover directs the brown rice outwards, making it easier to collect.
[0011] Optionally, side plates are fixed on both sides of the inclined plate, and the two side plates are parallel to each other.
[0012] By adopting the above technical solution, the side plate prevents broken rice from shifting to both sides on the inclined plate surface and sliding out.
[0013] Optionally, a baffle is fixedly inclined on the inner surface of the screen box on the side of the feed inlet, with the bottom of the baffle close to the surface of the flexible screen.
[0014] By adopting the above technical solution, the baffle prevents brown rice from entering the sieve box and then being discharged without being sieved, as it may enter the gap between the right side of the flexible screen and the sieve box.
[0015] Optionally, the bottom of the screen box is supported by four legs at each of the four corners.
[0016] By adopting the above technical solution, the screen box is supported by four legs.
[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:
[0018] 1. The technical solution of this application is to set up a flexible screen that is driven to rotate continuously inside the screen box. When rotating, the flexible screen that was originally in the upper layer will rotate to the lower layer after screening the brown rice. This is beneficial to allow the broken rice stuck in the screen holes to fall down under the action of gravity when the flexible screen rotates to the lower layer, thus ensuring the normal screening effect of the flexible screen during long-term operation.
[0019] 2. The technical solution of this application causes a slight deformation when the flexible screen rotates to the position of the two guide rollers below, resulting in the mesh openings becoming larger and smaller. This allows the stuck broken rice to fall out of the mesh and be cleaned up. Attached Figure Description
[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0021] Figure 1 This is a schematic diagram of the overall structure of the brown rice screening and separation equipment of this utility model;
[0022] Figure 2 This is a schematic diagram of the internal structure of the brown rice screening and separation device of this utility model.
[0023] In the diagram: 1. Screen box; 11. Drive roller; 111. Motor; 12. Guide roller; 13. Feed inlet; 131. Baffle; 14. Discharge outlet; 141. Guide cover; 142. Guide plate; 15. First row of impurity outlet; 16. Second row of impurity outlet; 17. Support leg; 2. Flexible screen; 3. Inclined plate; 31. Side plate. Detailed Implementation
[0024] Please see Figure 1-2 This utility model provides a technical solution: a brown rice screening and separation device, including a screen box 1 and a flexible screen 2. The bottom four corners of the screen box 1 are supported by support legs 17. Four support legs 17 are provided to support the screen box 1. The right side of the surface of the screen box 1 is provided with a feed inlet 13 for feeding brown rice to be screened into the screen box 1.
[0025] To achieve the purpose of sieving brown rice, the flexible screen 2 is made into a ring shape and placed inside the screen box 1. Inside the screen box 1 on the inner side of the flexible screen 2, a drive roller 11 and three guide rollers 12 are rotatably installed longitudinally. The drive roller 11 is located in the upper right corner of the screen box 1. Two of the guide rollers 12 are located at the same height on both sides of the lower part of the screen box 1, while the other guide roller 12 is placed inside the screen box 1 on the side away from the drive roller 11. The height of the guide roller 12 is less than the height of the drive roller 11, so that the drive roller 11 and the guide roller 12 open the flexible screen 2 from the inside and make the upper surface of the flexible screen 2 inclined. The drive roller 11 is connected to the motor 111 installed on the outer surface of the screen box 1 at its front end.
[0026] During sieving, the motor 111 is started to drive the drive roller 11 to rotate clockwise, and also drives the flexible screen 2 to rotate clockwise. Then, the brown rice to be sieved is fed into the inside of the sieve box 1 through the feed inlet 13. A baffle 131 is fixedly inclined on the inner surface of the sieve box 1 on the side of the feed inlet 13. The bottom of the baffle 131 is close to the surface of the flexible screen 2. The baffle 131 prevents the brown rice from entering the sieve box 1 and then being discharged without being sieved because it enters the gap between the right side of the flexible screen 2 and the sieve box 1. The surface of the screen 2 rolls downward to the left and is screened by the flexible screen 2. The brown rice cannot continue to roll downward to the left through the flexible screen 2 and finally falls from the left. The screen box 1 located on the side of the guide roller 12 at the higher position on the left has a discharge port 14. The inner side of the screen box 1 at the discharge port 14 is fixed with a guide plate 142 at an inclination. The higher end of the guide plate 142 is close to the surface of the flexible screen 2. The brown rice falling from the left can be discharged from the discharge port 14 under the guidance of the guide plate 142.
[0027] Furthermore, a guide cover 141 is welded and fixed to the outer surface of the sieve box 1 at the discharge port 14. The discharge port 14 is located inside the guide cover 141. The brown rice discharged from the discharge port 14 will be guided outward by the guide cover 141, which is more conducive to its collection.
[0028] The bottom of the sieve box 1 is provided with a first row of impurity outlets 15. When the flexible screen 2 rotates clockwise and rotates to the bottom, the broken rice stuck in the mesh on its surface is easily dropped by gravity and discharged from the first row of impurity outlets 15 at the bottom. In addition, a small amount of broken rice will remain stuck in the mesh. However, when the flexible screen 2 moves to the position of the two guide rollers 12 at the bottom, there will be a slight deformation, which will cause the mesh to have a process of increasing and decreasing in diameter. This will help the small amount of broken rice stuck in the mesh of the flexible screen 2 to fall and be discharged when the mesh diameter increases.
[0029] To prevent broken rice from falling onto the upper surface of the lower flexible screen 2 and getting stuck on the inner surface of the flexible screen 2 after passing through the upper flexible screen 2 during screening, an inclined plate 3 with front and rear inclinations is fixed to the inner wall surface of the screen box 1 inside the flexible screen 2. The height of the front end of the inclined plate 3 is less than the height of its rear end, and a second row of miscellaneous outlets 16 are opened on the surface of the screen box 1 above the front end of the inclined plate 3, so that the broken rice that has passed through the upper screening can be guided by the inclined plate 3 and discharged from the second row of miscellaneous outlets 16 at the front end.
[0030] Side plates 31 are fixed on both sides of the inclined plate 3. The two side plates 31 are parallel to each other. The side plates 31 prevent broken rice from shifting to both sides on the surface of the inclined plate 3 and sliding out.
[0031] In use, connect motor 111 to its control device and to the power supply. Start motor 111 to drive drive roller 11 to rotate clockwise, and drive flexible screen 2 to rotate clockwise as well. Then, feed the brown rice to be screened into the inside of screen box 1 through feed inlet 13. The brown rice rolls to the lower left on the surface of flexible screen 2 and is screened by flexible screen 2. The brown rice that cannot pass through the screen continues to roll to the lower left and finally falls from the left side. After being guided by guide plate 142, it is discharged from discharge outlet 14 and guided outward by guide cover 141. Broken rice passes through the flexible screen. After falling onto the surface of the inclined plate 3 below, the rice is guided towards the front end and discharged to the outside through the second row of miscellaneous outlets 16. Any broken rice stuck on the surface of the flexible screen 2 will rotate clockwise with the flexible screen 2. When it rotates to the right or lower position, the broken rice will fall and eventually be discharged from the first row of miscellaneous outlets 15. When the flexible screen 2 moves to the position of the two guide rollers 12 below, there will be slight deformation, which will cause the mesh to have a process of increasing and decreasing in size. This will help to allow a small amount of broken rice stuck in the mesh of the flexible screen 2 to fall and be discharged when the mesh size increases.
Claims
1. A brown rice screening and separation device, comprising a sieve box (1) and a flexible sieve (2), characterized in that: The flexible screen (2) is annular and placed inside the screen box (1). A drive roller (11) and three guide rollers (12) are rotatably mounted longitudinally inside the screen box (1) on the inner side of the flexible screen (2). The drive roller (11) and guide rollers (12) open the flexible screen (2) from the inside and make the upper surface of the flexible screen (2) inclined. The drive roller (11) is connected to the motor (111) installed on the outer surface of the screen box (1) at its front end. A feed inlet (13) is provided on the upper surface of the screen box (1) located at the higher end of the flexible screen (2). A first row of miscellaneous outlets (15) is provided at the bottom of the screen box (1). An inclined plate (3) with front and rear inclinations is fixed on the inner wall surface of the screen box (1) inside the flexible screen (2). The height of the front end of the inclined plate (3) is less than the height of its rear end. A second row of miscellaneous outlets (16) is provided on the surface of the screen box (1) above the front end of the inclined plate (3). A discharge outlet (14) is provided on the surface of the screen box (1) located on the side of the guide roller (12) at the higher position.
2. The brown rice screening and separation device according to claim 1, characterized in that: A guide plate (142) is fixedly inclined inside the screen box (1) at the discharge port (14), with the higher end of the guide plate (142) close to the surface of the flexible screen (2).
3. The brown rice screening and separation device according to claim 1, characterized in that: A guide cover (141) is welded and fixed to the outer surface of the screen box (1) at the discharge port (14), and the discharge port (14) is located inside the guide cover (141).
4. The brown rice screening and separation device according to claim 1, characterized in that: Both sides of the inclined plate (3) are fixed with side plates (31), and the two side plates (31) are parallel to each other.
5. The brown rice screening and separation device according to claim 1, characterized in that: A baffle (131) is fixedly fixed to the inner surface of the screen box (1) on the side of the feed inlet (13), with the bottom of the baffle (131) close to the surface of the flexible screen (2).
6. The brown rice screening and separation device according to claim 1, characterized in that: The bottom of the sieve box (1) is supported by four legs (17) at the four corners, and there are four legs (17).