A rice sieving device for rice production and processing

Abstract

This utility model discloses a rice bran screening device for rice production and processing, including a screening box. A feeding pipe is provided on the top of the screening box, and a feeding control structure is provided inside the feeding pipe. A multi-layer air blowing pipe group is provided inside the screening box and on one side of the feeding pipe. A rice bran collection chamber and a rice grain collection chamber are formed inside the screening box. Two sets of mounting edges are symmetrically arranged inside the rice grain collection chamber. A vibrating screen is provided on the mounting edges, and a vibrating motor is provided on one side of the bottom of the vibrating screen. An elastic support structure is provided between the vibrating screen and the mounting edges. A discharge port is opened on the side wall of the screening box, and the vibrating screen extends to the outside of the discharge port. A slag collection chamber is formed below the vibrating screen. A slag discharge pipe is provided at the bottom of both the rice bran collection chamber and the slag collection chamber. This utility model can improve the screening effect of rice bran and broken rice in rice and achieve stable separation.

Description

Technical Field

[0001] This utility model relates to the field of rice processing technology, and more specifically, it relates to a rice sifting device for rice production and processing. Background Technology

[0002] In rice processing, sieving is a crucial step in removing rice bran and broken rice from the surface of rice grains, directly affecting the quality and taste of the rice. Current rice processing sieving devices primarily use mechanical screening with vibrating screens or drum screens, employing screens of different apertures to efficiently separate whole rice grains from bran powder and broken rice. Air separation can also be used in conjunction to further remove bran and broken rice.

[0003] Chinese patent document with publication number CN222094024U discloses a rice bran screening device for rice production and processing. In this device, a fan structure is used to provide wind support for screening rice bran. However, simply using a fan structure makes it difficult to control the direction and wind speed, resulting in poor air blowing accuracy during the air separation process and reduced rice bran separation efficiency.

[0004] Furthermore, in the aforementioned scheme, the sieve frame is oscillated via a combination of a rotating shaft, rope, and winding wheel. The oscillation frequency is low, and the vibration amplitude is small. This results in rice grains not undergoing uniform displacement on the sieve mesh, causing them to accumulate locally rather than be evenly distributed. This non-linear motion significantly reduces the probability of broken rice passing through the sieve openings, affecting the final sieving effect of broken grains. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a rice sieving device for rice production and processing to solve the technical problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A rice bran screening device for rice production and processing includes a screening box, a feeding pipe at the top of the screening box, a feeding control structure inside the feeding pipe, a multi-layer air blowing pipe assembly inside the screening box and located on one side of the feeding pipe, a rice bran collection chamber and a rice grain collection chamber formed inside the screening box, two sets of mounting edges symmetrically arranged inside the rice grain collection chamber, a vibrating screen is mounted on the mounting edges, a vibrating motor is mounted on one side of the bottom of the vibrating screen, an elastic support structure is provided between the vibrating screen and the mounting edges, a discharge port is opened on the side wall of the screening box, the vibrating screen extends to the outside of the discharge port, a slag collection chamber is formed below the vibrating screen, and a slag discharge pipe is provided at the bottom of both the rice bran collection chamber and the slag collection chamber.

[0010] The present invention is further configured such that the multi-layer air blowing tube assembly includes an air blowing tube body, the air blowing tube body has multiple air blowing heads evenly arranged on the air blowing tube body facing the direction of the feeding tube, and the input end of the multiple air blowing tube bodies is provided with an air inlet structure.

[0011] This invention is further configured such that the air inlet structure includes an air inlet pipe extending from outside the screening box to inside the screening box. An air supply branch pipe is provided between the air inlet pipe and each of the blowing pipe bodies. Each air supply branch pipe is equipped with a valve. Clean, dry air from the outside is delivered to the air supply branch pipe through the air inlet pipe, and then to the blowing pipe body. The air is then blown out through the blower head on the blowing pipe body, achieving the air separation of rice bran from the falling rice grains. This invention allows for flexible control of the blowing force and air volume of each group of blowing pipe bodies via valves. Thus, the blowing force can be flexibly adjusted according to the air separation situation. This invention can be used in conjunction with existing industrial cameras to achieve real-time visual monitoring during rice bran air separation. The use of industrial cameras and related electrical components is existing technology and will not be elaborated upon in this invention.

[0012] The present invention is further configured such that the elastic support structure includes a support spring, the two ends of which are respectively connected and fixed to the mounting edge and the vibrating screen. The support spring realizes the elastic support of the vibrating screen on the mounting edge, so that when the vibrating motor runs, the vibrating screen can vibrate, thereby better realizing the vibrating screening effect of rice bran after air separation, and removing impurities, broken rice and other impurities.

[0013] The present invention is further provided that the top of the feeding pipe is provided with a feeding hopper, which facilitates the introduction of rice to be screened into the feeding pipe.

[0014] The present invention is further configured such that the feeding control structure includes a feeding guide plate, the feeding guide plate is rotatably and symmetrically installed in the feeding pipe, and the outside of the feeding pipe is provided with a rotation drive structure in conjunction with two sets of feeding guide plates. The feeding guide plate can guide the rice grains falling in the feeding pipe, thereby controlling the feeding amount of rice grains.

[0015] The present invention is further configured such that each end of the feeding guide plate is provided with a mounting shaft, the mounting shaft is mounted on the feeding pipe through bearings, the rotation drive structure includes a rotation motor, the rotation motor is connected to one of the mounting shafts, and gears are meshed between the two sets of mounting shafts. When the rotation motor is started, the mounting shaft is rotated by the rotation motor. Through the cooperation between the mounting shaft and the gear and the meshing action between the two sets of gears, the two sets of feeding guide plates can be controlled to rotate synchronously relative to each other. In this way, the distance between the bottom ends of the two sets of feeding guide plates can be adjusted to achieve flexible adjustment of the feeding amount. This can enhance the flexibility and accuracy of rice sieving during rice bran screening.

[0016] The present invention is further configured such that the screening box is equipped with an air outlet in conjunction with the multi-layer blower pipe assembly, and a protective net is provided at the air outlet. After the airflow blown out by the blower pipe separates the rice grains and rice bran, the airflow can be discharged through the air outlet. The protective net can prevent the rice bran from being discharged with it. The protective net can be cleaned by existing technologies such as tapping, back-blowing, or manual disassembly. The cleaning of the protective net is an existing technology, and the present invention will not elaborate on it.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a rice sifting device for rice production and processing, which has the following beneficial effects:

[0019] 1. The combination of high-efficiency air separation and vibrating screening improves the accuracy of chaff screening.

[0020] This invention utilizes a multi-layered air-blowing tube assembly to perform layered air separation on falling rice using multiple sets of adjustable air-blowing heads, effectively separating rice bran from whole rice grains. Combined with a vibrating screen and vibrating motor, broken rice and impurities are further removed, achieving a three-stage separation of rice bran, broken rice, and high-quality rice grains. The dual effect of air separation and vibrating screening significantly improves screening efficiency and accuracy, ensuring rice grain purity and meeting the requirements for high-quality rice processing.

[0021] 2. Flexible adjustment of material feeding and airflow to adapt to diverse production needs.

[0022] The feeding control structure of this device precisely controls the amount of rice falling through an adjustable-angle feeding guide, preventing accumulation or excessively rapid falling that could affect the air separation effect. Each layer of the blowing pipe assembly is equipped with an independent valve, which can adjust the airflow in real time according to the bran content, adapting to the processing of rice with different humidity levels and varieties. This modular adjustment design enhances the versatility of the equipment.

[0023] 3. The structure is compact and highly automated, reducing manual intervention.

[0024] The screening box integrates air separation, vibratory screening, and collection functions. Rice bran and broken rice are collected separately in independent chambers, reducing cross-contamination. It can also be linked with an industrial camera for real-time monitoring and feedback of the screening status, adjusting airflow and feeding speed accordingly. Detailed design features such as a protective net and elastic support structure further ensure operational stability, significantly reducing the frequency of manual cleaning and maintenance, and improving production efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a rice sieving device for rice production and processing according to this utility model. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the overall structure of a rice sieving device for rice production and processing according to this utility model. Figure 2 ;

[0027] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the installation structure of the vibrating screen along the mounting edge in this utility model;

[0029] Figure 5 This is a cross-sectional view of the internal structure of the feed tube in this utility model;

[0030] Figure 6 This is a schematic diagram of the overall structure of the multi-layer blower assembly in this utility model.

[0031] In the diagram: 1. Screening box; 2. Feeding pipe; 3. Multi-layer blowing pipe assembly; 4. Rice bran collection chamber; 5. Rice grain collection chamber; 6. Mounting edge; 7. Vibrating screen; 8. Vibrating motor; 9. Discharge port; 10. Slag collection chamber; 11. Slag discharge pipe; 12. Blowing pipe body; 13. Blowing head; 14. Air inlet pipe; 15. Air supply branch pipe; 16. Valve; 17. Support spring; 18. Feeding hopper; 19. Feeding guide plate; 20. Mounting shaft; 21. Rotating motor; 22. Gear; 23. Air outlet; 24. Protective net. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0034] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0035] Please see Figures 1-6 A rice bran screening device for rice production and processing includes a screening box 1, a feeding pipe 2 at the top of the screening box 1, a feeding control structure inside the feeding pipe 2, a multi-layer air blowing pipe group 3 inside the screening box 1 and located on one side of the feeding pipe 2, a rice bran collection chamber 4 and a rice grain collection chamber 5 formed inside the screening box 1, two sets of mounting edges 6 symmetrically arranged inside the rice grain collection chamber 5, a vibrating screen 7 is installed on the mounting edges 6, and a vibrating motor 8 is installed on one side of the bottom end of the vibrating screen 7, an elastic support structure is provided between the vibrating screen 7 and the mounting edges 6, a discharge port 9 is opened on the side wall of the screening box 1, the vibrating screen 7 extends to the outside of the discharge port 9, a slag collection chamber 10 is formed below the vibrating screen 7, and a slag discharge pipe 11 is provided at the bottom end of both the rice bran collection chamber 4 and the slag collection chamber 10.

[0036] Please see Figures 1-6 As one embodiment of the multi-layer air blowing tube group 3: the multi-layer air blowing tube group 3 includes an air blowing tube body 12, with multiple air blowing tube bodies 12 distributed vertically, and multiple air blowing heads 13 evenly arranged on the air blowing tube body 12 facing the direction of the feeding tube 2, and an air inlet structure is provided at the input end of the multiple air blowing tube bodies 12.

[0037] Please see Figures 1-6As one implementation of the air intake structure: the air intake structure includes an air intake pipe 14, which extends from the outside of the screening box 1 to the inside of the screening box 1. An air supply branch pipe 15 is provided between the air intake pipe 14 and each air supply branch pipe 12. Each air supply branch pipe 15 is equipped with a valve 16. Clean and dry air from the outside is delivered to the air supply branch pipe 15 through the air intake pipe 14, and then delivered to the air supply branch pipe 15 through the air supply branch pipe 15. The air is then blown out through the blower head 13 on the air supply branch pipe 12, realizing the air separation of rice bran in the falling rice grains. This utility model can flexibly control the blowing force and air volume of each group of air supply branch pipes 12 through the valve 16. In this way, the blowing force can be flexibly adjusted according to the air separation situation. Here, it can be used in conjunction with existing industrial cameras to realize real-time visual monitoring during rice bran air separation. The use of industrial cameras and related electrical components is existing technology, and this utility model will not elaborate on it.

[0038] Please see Figures 1-6 As one implementation of the elastic support structure: the elastic support structure includes a support spring 17, the two ends of which are respectively connected and fixed to the mounting edge 6 and the vibrating screen 7. The support spring 17 realizes the elastic support of the vibrating screen 7 on the mounting edge 6, so that when the vibrating motor 8 runs, the vibrating screen can vibrate, thereby better realizing the vibration screening effect of rice bran after air separation, and removing impurities, broken rice and other impurities.

[0039] Please see Figures 1-6 As one implementation of the feeding pipe 2: a feeding hopper 18 is provided at the top of the feeding pipe 2, through which the rice to be screened is easily introduced into the feeding pipe 2.

[0040] Please see Figures 1-6 As one implementation of the feeding control structure: The feeding control structure includes a feeding guide plate 19, which is rotatably and symmetrically installed inside the feeding pipe 2. The outside of the feeding pipe 2 is equipped with a rotation drive structure in conjunction with two sets of feeding guide plates 19. The feeding guide plate 19 can guide the rice grains falling in the feeding pipe 2, thereby controlling the amount of rice grains fed.

[0041] Please see Figures 1-6As one embodiment of the feeding guide plate 19: both ends of the feeding guide plate 19 are provided with mounting shafts 20. The mounting shafts 20 are mounted on the feeding pipe 2 through bearings. The rotation drive structure includes a rotation motor 21. The rotation motor 21 is connected to one of the mounting shafts 20. Gears 22 are meshed between the two sets of mounting shafts 20. When the rotation motor 21 is started, the mounting shafts 20 are rotated. Through the cooperation between the mounting shafts 20 and the gears 22 and the meshing action between the two sets of gears 22, the two sets of feeding guide plates 19 can be controlled to rotate synchronously relative to each other. In this way, the distance between the bottom ends of the two sets of feeding guide plates 19 can be adjusted to achieve flexible adjustment of the feeding amount. This can enhance the flexibility and accuracy of rice sieving during rice bran screening.

[0042] Please see Figures 1-6 As one embodiment of the screening box 1: the screening box 1 is equipped with an air outlet 23 in conjunction with the multi-layer blower pipe group 3, and a protective net 24 is provided at the air outlet 23. After the airflow blown out by the blower pipe 12 separates the rice grains and rice bran by air separation, the airflow can be discharged through the air outlet 23. The protective net 24 can prevent the rice bran from being discharged with it. The protective net 24 can be cleaned by the existing technology of knocking cleaning, back-blowing cleaning or manual disassembly. The cleaning of the protective net 24 is the existing technology, and this utility model will not elaborate on it.

[0043] In summary:

[0044] In use, rice is fed into the feeding pipe 2 through the feeding hopper 18. The installation shaft 20 is rotated by the rotating motor 21. The cooperation between the installation shaft 20 and the gear 22 and the meshing between the two sets of gears 22 can control the two sets of feeding guide plates 19 to rotate synchronously relative to each other. This allows the distance between the bottom ends of the two sets of feeding guide plates 19 to be adjusted, so that the feeding amount can be flexibly adjusted, and the rice falls into the screening box 1 in a suitable amount evenly in the feeding pipe 2.

[0045] During this process, clean and dry air from the outside is delivered to the air supply branch pipe 15 through the air inlet pipe 14, and then delivered to the air blowing pipe 12 through the air supply branch pipe 15. The air is then blown out through the blower head 13 on the air blowing pipe 12, realizing the air separation of rice bran in the falling rice grains. Under the action of wind, the falling rice bran and rice grains will be separated. The rice grains will fall onto the vibrating screen 7, while the rice bran will be blown into the rice bran collection chamber 4, thus achieving separation from the rice grains.

[0046] This utility model, by adopting a multi-layer air blowing tube group 3 structure, can better control the blowing direction and blowing range, and improve the accuracy of air selection;

[0047] Meanwhile, the present invention can flexibly control the blowing force and air volume of each group of blowing pipes 12 through valve 16. In this way, the blowing force can be flexibly adjusted according to the air separation situation, thereby improving the flexibility of rice bran air separation.

[0048] When the vibrating motor 8 is started, the rice grains after air separation fall onto the vibrating screen 7. The vibration of the vibrating screen 7 separates the broken rice grains from the large rice grains, allowing the broken rice grains to pass through the vibrating screen and fall into the slag collection chamber 10 below. Finally, the screened broken rice grains and rice bran are discharged through the corresponding slag discharge pipes 11, while the large rice grains are transported to the outside of the discharge port 9 through the vibrating screen and discharged.

[0049] Here, a control valve structure can be installed at the slag discharge pipe 11 to control its opening and closing as needed.

[0050] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0051] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here.

[0052] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them.

[0053] If any of the technical solutions mentioned above involve a synchronous belt drive structure, and there is no specific structure, they are all existing technologies involving the combination of synchronous belt and synchronous pulley. The connection between the synchronous belt and the shaft structure is a known technology and will not be elaborated upon in this utility model.

[0054] Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, and their specific circuit structures will not be elaborated here.

Claims

1. A rice production and processing bran screening device, comprising a screening box (1), characterized in that: The top of the screening box (1) is provided with a feeding pipe (2), and a feeding control structure is provided inside the feeding pipe (2). A multi-layer blowing pipe group (3) is provided inside the screening box (1) and on one side of the feeding pipe (2). A rice bran collection chamber (4) and a rice grain collection chamber (5) are formed inside the screening box (1). Two sets of mounting edges (6) are symmetrically arranged inside the rice grain collection chamber (5). A vibrating screen (7) is provided on the mounting edge (6), and a vibrating motor (8) is provided on one side of the bottom end of the vibrating screen (7). An elastic support structure is provided between the vibrating screen (7) and the mounting edge (6). A discharge port (9) is opened on the side wall of the screening box (1). The vibrating screen (7) extends to the outside of the discharge port (9). A slag collection chamber (10) is formed below the vibrating screen (7). A slag discharge pipe (11) is provided at the bottom end of both the rice bran collection chamber (4) and the slag collection chamber (10).

2. The chaff screening device for rice production and processing according to claim 1, characterized in that: The multi-layer blower assembly (3) includes a blower body (12), which has multiple blower bodies (12) distributed vertically. Multiple blower heads (13) are evenly arranged on the blower body (12) facing the feed pipe (2), and the input ends of the multiple blower bodies (12) are provided with air inlet structures.

3. The chaff screening device for rice production and processing according to claim 2, characterized in that: The air intake structure includes an air intake pipe (14), which extends from outside the screening box (1) to inside the screening box (1). An air supply branch pipe (15) is provided between the air intake pipe (14) and each of the blowing pipe bodies (12), and a valve (16) is provided on each of the air supply branch pipes (15).

4. The chaff screening device for rice production and processing according to claim 1, characterized in that: The elastic support structure includes a support spring (17), the two ends of which are respectively connected and fixed to the mounting edge (6) and the vibrating screen (7).

5. The chaff screening device for rice production and processing according to claim 1, characterized in that: The top of the feeding pipe (2) is provided with a feeding hopper (18).

6. The chaff screening device for rice production and processing according to claim 1, characterized in that: The feeding control structure includes a feeding guide plate (19), which is rotatably and symmetrically installed inside the feeding pipe (2). The outer side of the feeding pipe (2) is equipped with a rotation drive structure in conjunction with two sets of feeding guide plates (19).

7. The chaff screening device for rice production and processing according to claim 6, characterized in that: The feeding guide plate (19) is provided with mounting shafts (20) at both ends. The mounting shafts (20) are mounted on the feeding tube (2) by bearings. The rotation drive structure includes a rotation motor (21). The rotation motor (21) is connected to one of the mounting shafts (20) for transmission. Gears (22) are meshed between the two sets of mounting shafts (20).

8. The chaff screening device for rice production and processing according to claim 1, characterized in that: The screening box (1) is equipped with an air outlet (23) in conjunction with the multi-layer air blowing pipe group (3), and a protective net (24) is provided at the air outlet (23).

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