A combined winnowing and screening machine for rice
By designing a combined air-screen cleaning machine, which employs a heavy-duty screening box and a reversing component, multiple air-screen cleanings of rice are achieved. This solves the problem of incomplete removal of impurities from rice in existing technologies, improving the rice cleaning effect and the practicality of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUCHANG LIANGJUHUI RICE IND CO LTD
- Filing Date
- 2025-06-02
- Publication Date
- 2026-06-26
AI Technical Summary
In the existing technology, the rice sieve cleaning process only performs one cleaning operation. When there is a lot of impurities in the rice, it is impossible to completely remove the impurities, resulting in a reduced cleaning effect.
Design a combined air-screen cleaning machine, including a heavy screening box, a directional component and auxiliary components. Through the cooperation of a delivery pump and a guide plate, multiple air-screen cleaning of rice is achieved. Combined with the use of a vibrator and a dispersion hole, it ensures that the debris comes into full contact with the air.
It achieves thorough cleaning of rice, improves the impurity removal effect, simplifies the operation process, and enhances the practicality of the device.
Smart Images

Figure CN224405757U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rice processing equipment, and in particular to a combined air-screen cleaning machine for rice. Background Technology
[0002] After being cleaned, milled, and finished, paddy rice is made into finished rice. Therefore, during the cleaning process, it is necessary to remove any impurities that are trapped inside the paddy rice to prevent them from becoming more fragmented and difficult to remove during the subsequent milling process, which would increase the processing difficulty of the rice and reduce the quality of the finished product.
[0003] Existing technologies only clean rice once during the air-screening process. When there are many impurities in the rice, one air-screening is not enough to completely remove them, thus reducing the cleaning effect. To address this issue, we propose an air-screening combined cleaning machine for rice. Utility Model Content
[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.
[0005] Therefore, the purpose of this utility model is to provide a combined air sieve cleaning machine for rice, which can solve the problem that in the existing technology, the rice is only cleaned once during the air sieve cleaning process. When there are many impurities in the rice, the impurities cannot be completely removed by just one air sieve, thus reducing the cleaning effect of the rice.
[0006] To solve the above-mentioned technical problems, this utility model provides a combined air-screen cleaning machine for rice, which adopts the following technical solution: it includes a machine body, a feed hopper is fixedly provided on the top of the machine body, a discharge port is fixedly provided on the bottom of the machine body, an air-screen assembly is provided on the side of the machine body, a dispersing assembly is provided inside the machine body, support rods are fixedly provided at the four corners of the bottom of the machine body, a directional adjustment assembly is provided between the four support rods, a heavy screening box is fixedly provided between the two support rods at the front end, a collection box is fitted between the two support rods at the rear end, and an auxiliary assembly is provided between the heavy screening box and the machine body;
[0007] The auxiliary components include a conveying pump, which is fixedly mounted on the front side of the machine body via a support plate. The inlet and outlet ends of the conveying pump are respectively connected to an inlet pipe and an outlet pipe. A flexible hose is fixedly mounted at the lower end of the inlet pipe, and the lower end of the flexible hose extends into the interior of the heavy screening box. The upper end of the outlet pipe extends into the interior of the feed hopper.
[0008] Preferably, the air screen assembly includes a blower, which is fixedly installed on the right side of the machine body, and a flow collecting hood is fixedly installed on the left side of the machine body. A discharge port is fixedly installed at the bottom of the flow collecting hood, and the machine body, feed hopper, flow collecting hood and discharge port are interconnected.
[0009] Preferably, the steering assembly includes two horizontal plates, which are respectively fixedly disposed between two corresponding support rods. A guide plate is rotatably disposed between the two horizontal plates. A motor is fixedly disposed on the side of one of the horizontal plates, and the drive end of the motor passes through the horizontal plate and is fixedly connected to the guide plate.
[0010] Preferably, the dispersion component includes a vibrating plate and a vibrator. The vibrating plate is movably disposed inside the machine body. The vibrating plate has a plurality of dispersion holes arranged at equal intervals fixedly inside. The vibrator is fixedly disposed at the bottom of the vibrating plate. Connecting blocks are fixedly disposed on the left and right inner sidewalls of the machine body. A spring is fixedly connected between the vibrating plate and the connecting blocks.
[0011] Preferably, the height of the vibrating plate is greater than the height of the top of the fan, and there is a gap between the vibrating plate and the inner wall of the machine body.
[0012] Preferably, the guide plate is located directly below the discharge port.
[0013] Preferably, a controller is fixedly installed at the rear end of the machine body, and the fan, motor, delivery pump and vibrator are all electrically connected to the controller.
[0014] In summary, this utility model has at least one of the following beneficial effects:
[0015] 1. By installing auxiliary components, when there are many impurities in the rice, the rice after the initial impurity removal is guided into the interior of the heavy screening box. The conveying pump is started, and the rice after the initial impurity removal is sequentially drawn into the hose, feed pipe and discharge pipe, and then put back into the feed hopper for a second air screening to ensure the impurity removal effect of the rice. This solves the problem that in the existing technology, the rice is only cleaned once during the air screening process. When there are many impurities in the rice, one air screening is not enough to completely remove the impurities, which reduces the cleaning effect of the rice.
[0016] 2. The installation of the directional component facilitates the diversion of the rice after impurity removal, eliminating the need for manual handling of rice that requires further air sieving and moving it into the re-screening box, thus improving the practicality of the device.
[0017] 3. By installing the dispersion components, the vibrator is started, which drives the vibrating plate to vibrate, thereby spreading the rice grains that fall onto the vibrating plate evenly. This allows the rice grains to fall evenly through the dispersion holes, ensuring that the debris comes into full contact with the wind, thus better removing the debris and improving the practicality of the device. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a top-view three-dimensional structural diagram of a combined air-screen cleaning machine for rice according to the present invention;
[0020] Figure 2 This is a bottom-view three-dimensional structural diagram of a combined air-screen cleaning machine for rice according to the present invention;
[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the body of this utility model;
[0022] Figure 4 This is a schematic diagram of the orientation component and auxiliary component of this utility model;
[0023] Figure 5 This is a schematic diagram of the vibrating plate structure of this utility model.
[0024] Explanation of reference numerals in the attached drawings: 1. Machine body; 2. Feed hopper; 3. Fan; 4. Discharge port; 5. Support rod; 6. Horizontal plate; 7. Guide plate; 8. Motor; 9. Collection box; 10. Screening box; 11. Conveying pump; 12. Feed pipe; 13. Discharge pipe; 14. Hose; 15. Flow hood; 16. Impurity discharge port; 17. Vibrating plate; 18. Vibrator. Detailed Implementation
[0025] 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.
[0026] Please see Figure 1-5This utility model provides an embodiment of a combined air-screen cleaning machine for rice, comprising a body 1, a feed hopper 2 fixedly installed on the top of the body 1, a discharge port 4 fixedly installed on the bottom of the body 1, an air-screen assembly installed on the side of the body 1, support rods 5 fixedly installed at the four corners of the bottom of the body 1, a steering assembly installed between the four support rods 5, a heavy screening box 10 fixedly installed between the two support rods 5 at the front end, a collection box 9 fitted between the two support rods 5 at the rear end, an auxiliary assembly installed between the heavy screening box 10 and the body 1, the auxiliary assembly including a conveying pump 11, the conveying pump 11 being fixedly installed on the front side of the body 1 via a support plate, the feed end and discharge end of the conveying pump 11 being connected to a feed pipe 12 and a discharge pipe 13 respectively, a flexible hose 14 fixedly installed at the lower end of the feed pipe 12, the lower end of the flexible hose 14 extending into the interior of the heavy screening box 10, and the upper end of the discharge pipe 13 extending into the interior of the feed hopper 2.
[0027] Furthermore, the directional assembly includes two horizontal plates 6, which are fixedly installed between two corresponding support rods 5. A guide plate 7 is rotatably installed between the two horizontal plates 6. A motor 8 is fixedly installed on the side of one of the horizontal plates 6. The drive end of the motor 8 passes through the horizontal plate 6 and is fixedly connected to the guide plate 7. The guide plate 7 is located directly below the discharge port 4.
[0028] In use, the rice grains requiring impurities removal are fed into the feed hopper 2, where they are sieved by the air sieve assembly. The removed rice grains are then discharged through the discharge port 4. When there are few impurities in the rice grains, a single air sieve cleaning is sufficient to remove them. At this time, the guide plate 7 tilts towards the collection box 9, guiding the removed rice grains into the collection box 9 for collection. When there are many impurities in the rice grains, the motor 8 is started, causing the guide plate 7 to rotate between the two horizontal plates 6, moving the rice grains towards the heavy screening box. The 10 is tilted, and the rice after the initial impurity removal is guided into the interior of the heavy screening box 10. The conveying pump 11 is started, and the rice after the initial impurity removal is sequentially drawn into the hose 14, the feed pipe 12 and the discharge pipe 13, and then put back into the feed hopper 2 for a second air screening to ensure the impurity removal effect of the rice. This solves the problem that in the existing technology, the rice is only cleaned once during the air screening process. When there are a lot of impurities in the rice, one air screening is not enough to completely remove the impurities, which reduces the cleaning effect of the rice.
[0029] Furthermore, the air sieve assembly includes a blower 3, which is fixedly installed on the right side of the machine body 1. A flow collecting hood 15 is fixedly installed on the left side of the machine body 1. A waste discharge port 16 is fixedly installed at the bottom of the flow collecting hood 15. The machine body 1, the feed hopper 2, the flow collecting hood 15 and the waste discharge port 16 are interconnected. After the rice and paddy that need to be cleaned are put into the feed hopper 2, the blower 3 is started. The lighter waste is blown into the flow collecting hood 15 by the wind and then discharged from the waste discharge port 16 into the external collection bag.
[0030] In order to disperse the rice grains that fall into the machine body 1, a dispersion component is provided inside the machine body 1. The dispersion component includes a vibrating plate 17 and a vibrator 18. The vibrating plate 17 is movably disposed inside the machine body 1. Several dispersion holes are fixedly opened inside the vibrating plate 17 at equal intervals. The vibrator 18 is fixedly disposed at the bottom of the vibrating plate 17. Connecting blocks are fixedly disposed on the left and right inner side walls of the machine body 1. A spring is fixedly connected between the vibrating plate 17 and the connecting blocks. The height of the vibrating plate 17 is greater than the height of the top of the fan 3. There is a gap between the vibrating plate 17 and the inner wall of the machine body 1.
[0031] Specifically, after the rice grains that need to be cleaned are put into the inside of the feed hopper 2, the vibrator 18 is started, which drives the vibrating plate 17 to vibrate, thereby spreading the rice grains that fall onto the vibrating plate 17 evenly, so that the rice grains fall evenly through the dispersing holes, thereby allowing the impurities to come into full contact with the air, thus better removing the impurities and improving the practicality of the device.
[0032] Furthermore, a controller is fixedly installed at the rear end of the body 1. The fan 3, motor 8, delivery pump 11 and vibrator 18 are all electrically connected to the controller. The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.
[0033] Working Principle: In use, the rice grains requiring cleaning are fed into the feed hopper 2. The vibrator 18 is then activated, causing the vibrating plate 17 to vibrate. This spreads the rice grains evenly across the vibrating plate 17, allowing them to fall evenly through the dispersing holes. Simultaneously, the blower 3 is activated, blowing lighter impurities into the collection hood 15 and then discharging them from the discharge port 16 into an external collection bag. The cleaned rice grains are discharged through the outlet 4. When there are few impurities in the rice grains, a single air sieve cleaning is sufficient to remove them. When impurities are removed, the guide plate 7 tilts towards the collection box 9, thus guiding the cleaned rice into the collection box 9 for collection. When there are many impurities in the rice, the motor 8 is started, driving the guide plate 7 to rotate between the two horizontal plates 6 and tilt towards the heavy screening box 10, so that the rice after the initial impurity removal is guided into the heavy screening box 10. The conveying pump 11 is started, and the rice after the initial impurity removal is sequentially drawn into the hose 14, the feed pipe 12 and the discharge pipe 13, and then put back into the feed hopper 2 for a second air screening to ensure the impurity removal effect of the rice.
[0034] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be included within the scope of protection of this utility model.
Claims
1. A combined air-screen cleaning machine for rice, comprising a machine body (1), characterized in that: A feed hopper (2) is fixedly installed on the top of the machine body (1), a discharge port (4) is fixedly installed on the bottom of the machine body (1), an air screen assembly is installed on the side of the machine body (1), a dispersing assembly is installed inside the machine body (1), support rods (5) are fixedly installed at the four corners of the bottom of the machine body (1), a direction adjustment assembly is installed between the four support rods (5), a heavy screening box (10) is fixedly installed between the two support rods (5) at the front end, a collection box (9) is fitted between the two support rods (5) at the rear end, and an auxiliary assembly is installed between the heavy screening box (10) and the machine body (1). The auxiliary components include a conveying pump (11), which is fixedly mounted on the front side of the machine body (1) by a support plate. The inlet end and outlet end of the conveying pump (11) are respectively connected to a feed pipe (12) and an outlet pipe (13). A hose (14) is fixedly mounted on the lower end of the feed pipe (12). The lower end of the hose (14) extends into the interior of the heavy screening box (10), and the upper end of the outlet pipe (13) extends into the interior of the feed hopper (2).
2. The air-screening combined cleaning machine for rice according to claim 1, characterized in that: The air screen assembly includes a blower (3), which is fixedly installed on the right side of the machine body (1). A flow collector (15) is fixedly installed on the left side of the machine body (1). A discharge port (16) is fixedly installed at the bottom of the flow collector (15). The machine body (1), the feed hopper (2), the flow collector (15) and the discharge port (16) are interconnected.
3. The air-screening combined cleaning machine for rice according to claim 1, characterized in that: The steering assembly includes two horizontal plates (6), which are fixedly arranged between two corresponding support rods (5). A guide plate (7) is rotatably arranged between the two horizontal plates (6). A motor (8) is fixedly arranged on the side of one of the horizontal plates (6). The driving end of the motor (8) passes through the horizontal plate (6) and is fixedly connected to the guide plate (7).
4. A combined air-screen cleaning machine for rice according to claim 2, characterized in that: The dispersion assembly includes a vibrating plate (17) and a vibrator (18). The vibrating plate (17) is movably disposed inside the body (1). The vibrating plate (17) has several dispersion holes arranged at equal intervals. The vibrator (18) is fixedly disposed at the bottom of the vibrating plate (17). Connecting blocks are fixedly disposed on the left and right inner sidewalls of the body (1). A spring is fixedly connected between the vibrating plate (17) and the connecting blocks.
5. A combined air-screen cleaning machine for rice according to claim 4, characterized in that: The height of the vibrating plate (17) is greater than the height of the top of the fan (3), and there is a gap between the vibrating plate (17) and the inner wall of the body (1).
6. A combined air-screen cleaning machine for rice according to claim 3, characterized in that: The guide plate (7) is located directly below the discharge port (4).
7. A combined air-screen cleaning machine for rice according to claim 4, characterized in that: A controller is fixedly installed at the rear end of the machine body (1), and the fan (3), motor (8), conveying pump (11) and vibrator (18) are all electrically connected to the controller.