An automatic grading sieve for rice processing
By combining the dual effects of vibrating screening and airflow assistance, along with a multi-stage screen and collection trough design, the problem of rice bran clogging the filter holes is solved, achieving efficient separation of rice grains and rice bran and effective utilization of resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU BIXIN RICE GRP CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-17
AI Technical Summary
When existing automatic grading screens for rice processing shake left and right to separate rice, rice bran easily clogs the filter holes, resulting in reduced screening efficiency and increased equipment wear and maintenance costs.
It employs a dual approach of vibrating sieving and airflow assistance. The vibrator drives the feed trough to vibrate, and the airflow blows up the light rice bran to prevent clogging. At the same time, a collection trough is designed to collect the rice bran. Combined with multi-stage screens and vibrating motors, it achieves graded separation of rice grains.
It achieves efficient separation of rice grains and rice bran, prevents filter pore clogging, ensures the continuity and stability of the screening process, and improves resource utilization.
Smart Images
Figure CN224507650U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of grading sieve technology, specifically relating to an automatic grading sieve for rice processing. Background Technology
[0002] Automatic grading sieves for rice processing are key pieces of equipment in the rice processing flow. They achieve precise classification and screening by identifying characteristics such as rice grain size, shape, and density. Rice is produced by milling paddy, a process that not only introduces byproducts like rice bran but also produces broken grains, both of which affect rice quality. To ensure edible quality and improve rice quality, this equipment is necessary to effectively separate rice bran, broken grains, and plump rice grains.
[0003] Application No. 202323521841.0 discloses a vibration method for rice processing. "Through the action of a filtration mechanism and the operation of a motor, the gears drive a swinging component to oscillate the screening chamber left and right, thus solving the problem of rice easily accumulating during separation and ensuring smooth separation of rice. An ascending frame and filter plate are fixedly installed on the inner wall of the screening chamber to separate rice from impurities, improving rice quality. It is also simple to operate, easy to use, highly efficient, and provides proper grading, meeting the needs of users." The method uses left and right oscillation to separate rice. However, in actual operation, this method has certain limitations. Specifically, rice bran easily accumulates on the filter plate, gradually accumulating and clogging the filter holes over time. This not only hinders effective separation of rice bran but also severely affects the smooth passage of rice, leading to a decrease in screening efficiency. Furthermore, clogging of the filter holes may increase equipment wear, shorten its service life, and increase maintenance costs. Utility Model Content
[0004] The purpose of this invention is to provide an automatic grading sieve for rice processing, in order to solve the problem mentioned in the background art that rice bran easily clogs the filter holes when separating rice by left and right shaking, reducing sieving efficiency and increasing equipment wear and maintenance costs.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic grading sieve for rice processing, comprising: a support plate, with support plates installed on both sides of the upper surface of the support plate; a hollow conical guide trough is provided above the support plate, with the larger end of the guide trough facing upwards; a blowing assembly is provided at the bottom of the guide trough; a filter screen plate is installed at the bottom of the guide trough, with filter holes opened inside the filter screen plate; a screening box is installed on the upper surface of the support plate, and the screening box is located below the filter screen plate; a collection trough is installed around the top periphery of the guide trough; a ventilation plate is installed on the side wall of the collection trough; an installation plate is fixed to the top of the ventilation plate; and a vibrator is installed between the support plate and the collection trough.
[0006] Preferably, the blowing assembly includes a first blower, a first air guide pipe, and a first air outlet. The first blower is installed on the side wall of the material guide trough, the first air guide pipe is connected to the air outlet end of the first blower, and the first air outlet is connected to the air outlet end of the first air guide pipe. The first air outlet is arranged in a ring at the bottom of the inner wall of the hollow conical material guide trough, and the air outlet direction of the first air outlet is consistent with the inclination direction of the inner wall of the hollow conical material guide trough.
[0007] The top of the mounting plate is connected to a guide tube, and the top of the guide tube is fitted with a cover plate.
[0008] Through the above technical solution:
[0009] In operation, the raw material to be screened (a mixture of rice grains and rice bran) is guided into the hollow conical feed trough through the feed pipe. Then, the vibrator and the first blower are started to begin the screening process. After the vibrator starts, it causes the feed trough to vibrate, causing the raw material to move left and right or back and forth between the feed trough and the filter screen plate below. Because rice grains are denser than rice bran, under the combined action of vibration and gravity, the rice grains more easily pass through the filter holes on the filter screen plate and fall into the screening box below. The first blower delivers airflow to the first air outlet through the first air duct. The first air outlet blows the airflow evenly into the feed trough, with the airflow direction consistent with the inclined direction of the inner wall of the feed trough. Because rice bran is lighter, the airflow lifts it and moves it along the inclined direction of the inner wall of the feed trough, preventing the rice bran from clogging the filter holes and ensuring that the rice bran is effectively separated. A ventilation plate is installed on the side wall of the collection trough to ensure that the airflow moves along the inclined direction of the inner wall of the feed trough. Under the influence of airflow, the rice bran is inclined along the inner wall of the feed chute and eventually falls into the collection chute, thus separating the rice bran from the rice grains and completing the collection of the rice bran.
[0010] This automatic rice grading screen, through its innovative design and rational structural layout, achieves the separation of rice grains and rice bran. Its core advantage lies in utilizing the dual effects of vibrating screening and airflow assistance to ensure effective separation of rice grains and rice bran, prevent filter clogging, and guarantee the continuity and stability of the screening process. Simultaneously, the design of the collection trough allows for the collection of rice bran, avoiding material waste and improving resource utilization.
[0011] The screening box is equipped with a first screen and a second screen installed at an angle inside. The screening box is also equipped with a first storage box and a second storage box on its side wall. The first storage box is located at the discharge end of the first screen, and the second storage box is located at the discharge end of the second screen. Vibration motors are installed on the outer walls of both the first screen and the second screen.
[0012] Preferably, a second fan is installed on the outer wall of the screening box. The air outlet of the second fan is connected to a plurality of second air guide pipes. Each second air guide pipe has a second air outlet installed at its air outlet. The second air outlets are respectively located on the upper part of the inclined ends of the first screen and the second screen, and the air outlets in the second air outlets are arranged along the inclined direction of the first screen and the second screen.
[0013] The screening box has an opening on its side wall, and the discharge ends of the first screen and the second screen are both connected to a guide plate, which extends to the outside of the screening box through the opening.
[0014] Through the above technical solution:
[0015] In operation, rice grains are first fed onto the upper surface of the first screen. Under the combined action of continuous vibration from the vibrating motor and the weight of the rice grains themselves, larger grains slide down the inclined screen surface and eventually enter the first storage bin, completing the first stage of separation.
[0016] After initial screening, the remaining smaller rice grains pass through the sieve holes of the first sieve and fall onto the upper surface of the second sieve below. On the second sieve, medium-sized rice grains slide down the sieve surface under the influence of vibration and gravity, eventually entering the second storage bin, thus achieving the second stage of separation.
[0017] The remaining small rice grains continue to pass through the sieve holes of the second sieve and eventually fall into the bottom of the sieving box, completing the final separation.
[0018] During the screening process, to prevent rice grains from accumulating and clogging on the screen, the system can periodically activate the second blower. The second blower guides airflow into the second air outlet through the second air guide pipe. The airflow blows the rice grains along the inclined direction of the screen, promoting their smooth sliding and avoiding blockage caused by material accumulation.
[0019] This automatic grading screen achieves the grading and separation of rice grains through an innovative multi-stage sieving design and an airflow-assisted system. Its core advantage lies in the synergistic effect of two layers of screens and a vibrating motor, ensuring the effective separation of rice grains of different sizes. The periodic activation of a second fan and an air guiding system effectively prevents screen clogging, ensuring the continuity and stability of the sieving process.
[0020] Compared with the prior art, the beneficial effects of this utility model are:
[0021] (1) This utility model achieves efficient separation of rice grains and rice bran through the synergistic effect of vibrating screening and airflow assistance, while effectively preventing filter clogging and ensuring the continuity and stability of screening operations. In addition, the innovative design of the collection trough can collect rice bran in a timely manner, avoid material loss, and significantly improve resource utilization efficiency.
[0022] (2) This utility model achieves precise separation of rice grains of different sizes through the coordinated operation of two layers of screens and a vibrating motor; at the same time, the periodic start and stop of the second fan in conjunction with the air guiding system effectively prevents screen blockage and ensures continuous and stable operation of the screening process. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of this utility model;
[0024] Figure 2 This is a schematic diagram of the material guide channel of this utility model;
[0025] Figure 3 This is a schematic diagram of the structure of the first screen of this utility model;
[0026] In the diagram: 1. Bearing plate; 2. Support plate; 3. Guide trough; 4. Filter screen plate; 5. Filter holes; 6. Collection trough; 7. Ventilation plate; 8. Mounting plate; 9. Guide pipe; 10. Cover plate; 11. First fan; 12. First air duct; 13. First air outlet; 14. Vibrator; 15. Screening box; 16. First screen; 17. First storage box; 18. Second screen; 19. Second storage box; 20. Vibration motor; 21. Second fan; 22. Second air duct; 23. Second air outlet; 24. Guide plate. Detailed Implementation
[0027] 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.
[0028] Please see Figures 1-2 As shown, this utility model provides the following technical solution: an automatic grading sieve for rice processing, comprising: a support plate 1, support plates 2 installed on both sides of the upper surface of the support plate 1, a hollow conical guide trough 3 provided above the support plate 1, with the large opening of the guide trough 3 facing upwards, a blowing assembly provided at the bottom of the guide trough 3, a filter screen plate 4 installed at the bottom of the guide trough 3, filter holes 5 opened in the filter screen plate 4, a screening box 15 installed on the upper surface of the support plate 1, and the screening box 15 located below the filter screen plate 4, a collection trough 6 installed around the top periphery of the guide trough 3, a ventilation plate 7 installed on the side wall of the collection trough 6, an installation plate 8 fixed at the top of the ventilation plate 7, and a vibrator 14 installed between the support plate 2 and the collection trough 6.
[0029] Furthermore, the blowing assembly includes a first blower 11, a first air guide pipe 12, and a first air outlet 13. The first blower 11 is installed on the side wall of the material guide trough 3. The first air guide pipe 12 is connected to the air outlet end of the first blower 11. The first air outlet 13 is connected to the air outlet end of the first air guide pipe 12. The first air outlet 13 is arranged in a ring at the bottom of the inner wall of the hollow conical material guide trough 3, and the air outlet direction of the first air outlet 13 is consistent with the inclination direction of the inner wall of the hollow conical material guide trough 3.
[0030] The top of the mounting plate 8 is connected to a guide tube 9, and the top of the guide tube 9 is fitted with a cover plate 10.
[0031] Through the above technical solution:
[0032] In operation, the raw material to be screened (a mixture of rice grains and rice bran) is introduced into the hollow conical feed trough 3 through the feed pipe 9. Then, the vibrator 14 and the first blower 11 are started to begin the screening process. After the vibrator 14 starts, it causes the feed trough 3 to vibrate, causing the raw material to move left and right or back and forth on the feed trough 3 and the filter screen plate 4 below. Because rice grains are denser than rice bran, under the combined action of vibration and gravity, the rice grains more easily pass through the filter holes 5 on the filter screen plate 4 and fall into the screening box 15 below. The first blower 11 delivers airflow to the first air outlet 13 through the first air duct 12. The first air outlet 13 blows the airflow evenly into the feed trough 3, with the airflow direction consistent with the inclined direction of the inner wall of the feed trough 3. Because rice bran is lighter, the airflow lifts it up and moves it along the inclined direction of the inner wall of the feed trough 3, preventing the rice bran from clogging the filter holes 5 and ensuring that the rice bran is effectively separated. The ventilation plate 7 is installed on the side wall of the collection trough 6 to ensure that the airflow moves along the inclined direction of the inner wall of the guide trough 3. Under the action of the airflow, the rice bran moves along the inclined direction of the inner wall of the guide trough 3 and finally falls into the collection trough 6, realizing the separation of rice bran from rice grains and completing the collection of rice bran.
[0033] This automatic rice grading screen, through its innovative design and rational structural layout, achieves the separation of rice grains and rice bran. Its core advantage lies in utilizing the dual effects of vibrating screening and airflow assistance to ensure effective separation of rice grains and rice bran, prevent clogging of the filter holes 5, and guarantee the continuity and stability of the screening process. Simultaneously, the design of the collection trough 6 enables the collection of rice bran, avoiding material waste and improving resource utilization.
[0034] Please see Figure 1 and Figure 3 As shown, a first screen 16 and a second screen 18 are installed at an incline inside the screening box 15. A first storage box 17 and a second storage box 19 are installed on the side wall of the screening box 15. The first storage box 17 is located at the discharge end of the first screen 16, and the second storage box 19 is located at the discharge end of the second screen 18. Vibration motors 20 are installed on the outer walls of both the first screen 16 and the second screen 18.
[0035] Furthermore, a second fan 21 is installed on the outer wall of the screening box 15. The air outlet of the second fan 21 is connected to a plurality of second air guide pipes 22. Each second air guide pipe 22 is equipped with a second air outlet head 23 at its air outlet end. The second air outlet head 23 is respectively located on the upper part of the inclined ends of the first screen 16 and the second screen 18, and the air outlet in the second air outlet head 23 is arranged along the inclined direction of the first screen 16 and the second screen 18.
[0036] The side wall of the screening box 15 has an opening, and the discharge ends of the first screen 16 and the second screen 18 are both connected to a guide plate 24, which extends to the outside of the screening box 15 through the opening.
[0037] Through the above technical solution:
[0038] In use, rice grains are first guided onto the upper surface of the first screen 16. Under the combined action of the continuous vibration of the vibrating motor 20 and the weight of the rice grains themselves, large rice grains slide down the inclined screen surface and finally enter the first storage bin 17, completing the first stage of separation.
[0039] After initial screening, the remaining smaller rice grains pass through the sieve holes of the first sieve 16 and fall onto the upper surface of the second sieve 18 below. On the second sieve 18, medium-sized rice grains slide down the sieve surface under the action of vibration and gravity, and finally enter the second storage bin 19, achieving the second stage of separation.
[0040] The remaining small rice grains continue to pass through the sieve holes of the second sieve 18 and eventually fall into the bottom of the screening box 15, completing the final separation.
[0041] During the screening process, to prevent rice grains from accumulating and clogging on the screen, the system can periodically start the second fan 21. The second fan 21 guides the airflow into the second air outlet 23 through the second air guide pipe 22. The airflow blows the rice grains along the inclined direction of the screen, promoting their smooth sliding and avoiding blockage caused by material accumulation.
[0042] This automatic grading screen achieves the grading and separation of rice grains through an innovative multi-stage sieving design and an airflow-assisted system. Its core advantage lies in the synergistic effect of two layers of screens and a vibrating motor 20, which ensures the effective separation of rice grains of different sizes. Furthermore, the periodic activation of the second fan 21 and the air guiding system effectively prevents screen clogging, ensuring the continuity and stability of the sieving process.
[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An automatic grading sieve for rice processing, characterized by, include: A support plate (1) is provided, and support plates (2) are installed on both sides of the upper surface of the support plate (1). A hollow conical guide trough (3) is provided above the support plate (1), and the large opening of the guide trough (3) is facing upward. A blowing assembly is provided at the bottom of the guide trough (3). A filter screen plate (4) is installed at the bottom of the guide trough (3). Filter holes (5) are opened in the filter screen plate (4). A screening box (15) is installed on the upper surface of the support plate (1), and the screening box (15) is located below the filter screen plate (4). A collection trough (6) is installed around the top of the guide trough (3). A ventilation plate (7) is installed on the side wall of the collection trough (6). An installation plate (8) is fixed at the top of the ventilation plate (7). A vibrator (14) is installed between the support plate (2) and the collection trough (6).
2. The automatic grading screen for rice processing according to claim 1, characterized in that: The blowing assembly includes a first blower (11), a first air guide pipe (12), and a first air outlet (13). The first blower (11) is installed on the side wall of the material guide trough (3). The first air guide pipe (12) is connected to the air outlet of the first blower (11). The first air outlet (13) is connected to the air outlet of the first air guide pipe (12). The first air outlet (13) is arranged in a ring at the bottom of the inner wall of the hollow conical material guide trough (3), and the air outlet direction of the first air outlet (13) is consistent with the inclination direction of the inner wall of the hollow conical material guide trough (3).
3. The automatic grading screen for rice processing according to claim 2, characterized in that: The top of the mounting plate (8) is connected to a guide tube (9), and the top of the guide tube (9) is fitted with a cover plate (10).
4. The automatic grading screen for rice processing according to claim 1, characterized in that: The screening box (15) is equipped with a first screen (16) and a second screen (18) installed at an incline. The screening box (15) is equipped with a first storage box (17) and a second storage box (19) on its side wall. The first storage box (17) is located at the discharge end of the first screen (16), and the second storage box (19) is located at the discharge end of the second screen (18). The outer walls of the first screen (16) and the second screen (18) are both equipped with a vibration motor (20).
5. The automatic grading screen for rice processing according to claim 4, characterized in that: The outer wall of the screening box (15) is equipped with a second fan (21). The air outlet of the second fan (21) is connected to a plurality of second air guide pipes (22). Each second air guide pipe (22) is equipped with a second air outlet (23) at its air outlet. The second air outlets (23) are respectively located on the upper part of the inclined ends of the first screen (16) and the second screen (18), and the air outlets in the second air outlets (23) are arranged along the inclined direction of the first screen (16) and the second screen (18).
6. The automatic grading screen for rice processing according to claim 5, characterized in that: The side wall of the screening box (15) has an opening, and the discharge ends of the first screen (16) and the second screen (18) are both connected to a guide plate (24), and the guide plate (24) extends to the outside of the screening box (15) through the opening.