A bran and chaff separating device for rice processing
Patent Information
- Application Number
- CN202522722914.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-12-23
AI Technical Summary
[0003]然而，现有糠粞分离装置在实际应用中仍存在显著的技术缺陷，物料裹挟导致筛分不充分，碾米后的物料中，部分米糠、碎粞易与完整大米表面吸附粘连，形成裹挟状态，现有单一筛分结构仅依靠物料自身重力或简单振动实现分离，无法有效打破这种裹挟关系，导致分离后成品大米中仍残留较多糠粞杂质，不仅影响大米外观与品质，还可能因杂质残留加速大米霉变
1.通过在导料筒内侧设置磨料条，配合转轴上的搅动板、带缺口及错位固定齿的拨动板，形成研磨、搅动、梳理的协同作用，物料在导料筒内输送过程中，磨料条与物料摩擦可剥离大米表面吸附的糠粞杂质，搅动板实现物料均匀分散，错位固定齿能精准梳理结块的糠粞混合物并将其细化，有效打破现有技术中物料衷挟的问题，使糠粞与大米彻底分离，大幅提升筛分充分性，降低成品大米中杂质残留量。
Smart Images
Figure CN224778634U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rice processing, specifically to a rice bran separation device for rice processing. Background Technology
[0002] In the rice processing, bran separation is a key step in improving the purity and quality of finished rice. Its core objective is to accurately separate the rice bran, broken rice grains, and whole rice grains mixed in the post-milling material, remove light impurities, and ensure the taste and storage stability of the finished rice. Currently, the bran separation devices widely used in the industry are mostly based on a single screening structure, which achieves material grading and screening through the vibration or rotation of the screen. With its simple structure and convenient operation, it is suitable for the production needs of small and medium-sized rice processing plants.
[0003] However, existing bran and rice bran separation devices still have significant technical defects in practical applications. Material entrainment leads to insufficient screening. In the material after rice milling, some rice bran and rice chaff easily adhere to the surface of whole rice, forming an entrainment state. The existing single screening structure relies only on the material's own gravity or simple vibration to achieve separation, which cannot effectively break this entrainment relationship. As a result, a lot of bran and rice chaff impurities remain in the finished rice after separation, which not only affects the appearance and quality of the rice, but may also accelerate the mold growth of the rice due to the residue of impurities.
[0004] Some of the clumps of bran mixture are difficult to disperse completely through conventional screening structures, further reducing separation efficiency and purity. Existing devices often lack targeted structures for discharging light impurities. Fine millet bran, dust, and other light impurities generated during screening are easily suspended in the screening chamber or fall with the finished rice and cannot be discharged in time. This will not only cause dust pollution in the workshop and affect the working environment, but also lead to secondary mixing of impurities and reduce the separation effect. Therefore, it is necessary to design a bran separation device for rice processing to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a rice bran separation device for rice processing, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a rice bran separation device, comprising a support frame and a screening box installed on the top of the support frame, a discharge box being bolted to the bottom of the screening box, a feeding box being installed on one side of the screening box via a guide pipe, a rotating shaft being installed through the screening box and the guide pipe, a control box being installed on one side of the support frame, a driving component being installed between the top of the control box and the rotating shaft, a screening component being installed inside the screening box, a discharge hood being bolted to one side of the screening box, and a discharge pipe being welded to the bottom of the discharge hood.
[0007] Preferably, the screening component includes a guide cylinder installed inside the screening box, a screen plate installed on the outside of the guide cylinder and near the top of the screening box, a fixing pipe fixedly installed on the outside of the rotating shaft by bolts, and three circumferentially arranged stirring plates welded on the outside of the fixing pipe.
[0008] Preferably, the outer wall of the fixed tube is welded with three circumferentially arranged actuating plates, and one side of each actuating plate has a plurality of evenly arranged notches. Multiple fixing teeth are installed on both sides of each notch, and the multiple fixing teeth are staggered.
[0009] Preferably, the driving component includes a motor mounted on the top of the control box, a rotating disk mounted on the motor via an output shaft, a driven disk fitted and fixedly mounted on one end of the rotating shaft, and two belts fitted on the outer sides of the rotating disk and the driven disk.
[0010] Preferably, a guide plate for conveying materials is welded to the outer side of the rotating shaft.
[0011] Preferably, three abrasive strips are bolted to the inner wall of the feed cylinder.
[0012] Preferably, a plurality of circumferentially arranged blades are welded to the outer side of the shaft and near its end.
[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting abrasive strips inside the feed cylinder, in conjunction with the stirring plate on the rotating shaft and the agitator plate with notches and staggered fixed teeth, a synergistic effect of grinding, stirring and combing is formed. During the material conveying in the feed cylinder, the friction between the abrasive strips and the material can remove the bran impurities adsorbed on the surface of the rice. The stirring plate realizes the uniform dispersion of the material, and the staggered fixed teeth can accurately comb the clumps of bran mixture and refine it. This effectively breaks the problem of material entanglement in the existing technology, so that the bran and rice are completely separated, greatly improving the sieving adequacy and reducing the amount of impurities remaining in the finished rice.
[0014] 2. Multiple blades arranged in a circular pattern are set near the end of the rotating shaft. When the shaft rotates, it drives the blades to rotate synchronously, forming a directional airflow in the screening box. This airflow can accurately carry light impurities such as fine millet bran and dust generated during the screening process towards the discharge box, and finally discharge them through the discharge pipe. This solves the problems of incomplete discharge of light impurities, easy secondary mixing and environmental pollution in the existing technology, realizes the directional collection of impurities, and significantly improves the workshop working environment.
[0015] 3. By setting a guide plate on the outside of the rotating shaft, the material can be guided to be conveyed forward stably along the guide cylinder, avoiding material accumulation and blockage. At the same time, the drive component adopts a double belt drive structure, which provides smoother power transmission compared to a single drive method. This ensures stable rotation speed of components such as the rotating shaft, stirring plate, and blades, avoiding material impact damage caused by transmission fluctuations. The overall structure does not rely on excessive vibration to achieve separation, effectively reducing the rice breakage rate, ensuring the quality of finished rice, improving the stability of the device operation, and reducing subsequent maintenance costs. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a left-side sectional perspective view of the overall structure of this utility model; Figure 3 This is a front sectional perspective view of the overall structure of this utility model; Figure 4 The overall structure of this utility model Figure 3 Enlarged view of point A in the middle.
[0017] In the diagram: 1. Support frame; 2. Screening box; 3. Discharge box; 4. Guide pipe; 5. Feeding box; 6. Rotating shaft; 7. Control box; 8. Discharge hood; 9. Discharge pipe; 10. Guide cylinder; 11. Screen plate; 12. Fixed pipe; 13. Stirring plate; 14. Actuating plate; 15. Notch; 16. Fixed tooth; 17. Motor; 18. Rotating disc; 19. Driven disc; 20. Belt; 21. Guide plate; 22. Abrasive strip; 23. Blade. Detailed Implementation
[0018] 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.
[0019] Example 1 Please refer to Figure 1-4 As shown, this utility model provides a rice bran separation device, including a support 1 and a screening box 2 installed on the top of the support 1. A discharge box 3 is bolted to the bottom of the screening box 2. A feeding box 5 is installed on one side of the screening box 2 through a guide pipe 4. A rotating shaft 6 is installed through the screening box 2 and the guide pipe 4. A control box 7 is installed on one side of the support 1. A drive component is installed between the top of the control box 7 and the rotating shaft 6. A screening component is installed inside the screening box 2. A discharge cover 8 is bolted to one side of the screening box 2. A discharge pipe 9 is welded to the bottom of the discharge cover 8.
[0020] Specifically, the drive unit drives the rotating shaft 6 to rotate rapidly, and the rotating shaft 6 drives the screening component to rotate rapidly inside the screening box 2. Hard and heavy materials are drawn into the top of the screening box 2 by centrifugal force and then fall into the discharge box 3 for discharge. The screening component can crush and grind the materials in the screening box 2, avoid the rice grains and other materials being wrapped in the bran, and improve the uniformity and fullness of material screening and separation.
[0021] The screening component includes a guide cylinder 10 installed inside the screening box 2, a screen plate 11 installed on the outside of the guide cylinder 10 near the top of the screening box 2, a fixing pipe 12 fixed to the outside of the rotating shaft 6 by bolts, three circumferentially arranged stirring plates 13 welded to the outside of the fixing pipe 12, three circumferentially arranged actuating plates 14 welded to the outer wall of the fixing pipe 12, a plurality of evenly arranged notches 15 opened on one side of the actuating plates 14, a plurality of fixing teeth 16 installed on both sides of the notches 15, the plurality of fixing teeth 16 being staggered, a guide plate 21 for conveying materials welded to the outside of the rotating shaft 6, three abrasive strips 22 installed on the inner wall of the guide cylinder 10 by bolts, and a plurality of circumferentially arranged blades 23 welded to the outside of the rotating shaft 6 near the end.
[0022] More specifically, by setting a guide plate 21 on the outside of the rotating shaft 6, the material can be guided to be conveyed forward stably along the guide cylinder 10, avoiding material accumulation and blockage. By setting abrasive strips 22 on the inside of the guide cylinder 10, together with the stirring plate 13, the notched plate 15 and the staggered fixed teeth 16 on the rotating shaft 6, a synergistic effect of grinding, stirring and combing is formed. During the material conveying in the guide cylinder 10, the friction between the abrasive strips 22 and the material can remove the bran impurities adsorbed on the surface of the rice. The stirring plate 13 realizes the uniform dispersion of the material. The staggered fixed teeth 16 can accurately comb the clumps of bran mixture and refine it, effectively breaking the problem of material contamination in the existing technology, so that the bran and rice are completely separated, greatly improving the sieving adequacy and reducing the amount of impurities remaining in the finished rice.
[0023] Furthermore, multiple blades 23 arranged in a circular pattern are provided near the end of the rotating shaft 6. When the rotating shaft 6 rotates, it drives the blades 23 to rotate synchronously, forming a directional airflow in the screening box 2. This airflow can accurately drive light impurities such as fine millet bran and dust generated during the screening process to flow towards the discharge box, and finally discharge them through the discharge pipe 9. This solves the problem of incomplete discharge of light impurities, easy secondary mixing and environmental pollution in the existing technology, realizes the directional collection of impurities, and significantly improves the workshop working environment.
[0024] As should be added, the driving components include a motor 17 mounted on the top of the control box 7, a rotating disk 18 mounted on the motor 17 via an output shaft, a driven disk 19 mounted and fixedly installed on one end of the rotating shaft 6, and two belts 20 mounted on the outer sides of the rotating disk 18 and the driven disk 19.
[0025] Furthermore, the drive unit adopts a double belt 20 transmission structure, which provides smoother power transmission compared to a single transmission method, ensuring stable rotation speed of components such as the rotating shaft 6, stirring plate 13, and blades 23, and avoiding material impact damage caused by transmission fluctuations.
[0026] Working principle: First, start the motor 17, which drives the driven disc 19 to rotate via the belt 20 on the outside of the rotating disc 18. Simultaneously, the driven disc 19 rotates, causing the rotating shaft 6 to rotate. The rotating shaft 6 then drives the guide plate 21 to rotate within the guide pipe 4. The material in the feeding box 5 is conveyed through the guide plate 21 in the guide pipe 4 into the guide cylinder 10 within the screening box 2. At the same time, the rotating shaft 6 drives the agitator plate 13 and the agitator plate 14 to rotate rapidly. The agitator plate 13 and the agitator plate 14 cause the material to rotate rapidly, generating friction. The centrifugal force simultaneously causes multiple fixed teeth 16 within the notch 15 on one side of the plate 14 to cut and break down the entrained material. At the same time, the stirring plate 13 and the abrasive strips 22 abrasively separate the material. The material is pulled by centrifugal force through the screen plate 11 and falls into the discharge box 3 at the bottom of the screening box 2 for discharge. Meanwhile, the rotating shaft 6 drives multiple blades 23 to rotate, forming a directional airflow within the screening box 2. This airflow can precisely carry light impurities such as fine millet bran and dust generated during the screening process towards the discharge box, and finally discharge them through the discharge pipe 9.
[0027] The contents not described in detail in this specification are existing technologies known to those skilled in the art.
[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A rice bran separation device for rice processing, comprising a support frame (1) and a screening box (2) installed on top of the support frame (1), characterized in that: The bottom of the screening box (2) is bolted with a discharge box (3), and a feeding box (5) is installed on one side of the screening box (2) through a guide pipe (4). A rotating shaft (6) is installed between the screening box (2) and the guide pipe (4). A control box (7) is installed on one side of the bracket (1). A drive component is installed between the top of the control box (7) and the rotating shaft (6). A screening component is installed inside the screening box (2). A discharge cover (8) is bolted on one side of the screening box (2). A discharge pipe (9) is welded to the bottom of the discharge cover (8). The screening component includes a guide cylinder (10) installed inside the screening box (2), a screen plate (11) installed on the outside of the guide cylinder (10) and near the top of the screening box (2), a fixing pipe (12) fixedly installed on the outside of the rotating shaft (6) by bolts, three circumferentially arranged stirring plates (13) welded on the outside of the fixing pipe (12), and three abrasive strips (22) installed on the inner wall of the guide cylinder (10) by bolts. The outer wall of the fixed tube (12) is welded with three circumferentially arranged actuating plates (14). One side of the actuating plate (14) has a plurality of evenly arranged notches (15). On both sides of the notches (15) are a plurality of fixing teeth (16), which are staggered.
2. The rice bran separation device according to claim 1, characterized in that: The drive unit includes a motor (17) mounted on the top of the control box (7). The motor (17) has a rotating disk (18) mounted on its output shaft. A driven disk (19) is fitted and fixedly mounted on one end of the rotating shaft (6). Two belts (20) are fitted on the outer sides of the rotating disk (18) and the driven disk (19).
3. The rice bran separation device according to claim 2, characterized in that: The outer side of the rotating shaft (6) is welded with a guide plate (21) for conveying materials.
4. The rice bran separation device according to claim 3, characterized in that: Multiple blades (23) arranged in a circular pattern are welded to the outside of the shaft (6) and near its end.