Rice stone picking machine with multi-stage screening structure
The rice stone-picking machine with a multi-stage screening structure solves the problems of clogging and low screening efficiency in rice stone-picking equipment, and achieves graded screening of rice and effective removal of stones.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN ZHENGHONG FOOD CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional rice stone removal equipment is prone to clogging when processing large quantities of rice, and the single-level screen structure makes it difficult to grade and remove stones of various sizes, affecting screening efficiency and equipment maintenance costs.
It adopts a multi-stage screening structure, including a material distribution mechanism and a multi-stage screening mechanism. The rice in the storage trough is driven by a rotating drum to fall onto the multi-stage screen plate. Combined with the vibration screening by a linear vibrating motor, the rice is graded and screened and different sized stones are discharged separately.
To achieve uniform feeding of rice, avoid clogging, improve screening efficiency, reduce screening pressure at each stage, and ensure effective removal of stones of different sizes.
Smart Images
Figure CN224127885U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rice destone removal technology, and in particular to a rice stone removal machine with a multi-stage screening structure. Background Technology
[0002] As a vital food crop widely grown and consumed globally, the removal of impurities during rice processing has always been a crucial step affecting rice quality and production efficiency. In particular, hard impurities such as stones mixed in with rice can not only damage subsequent processing equipment and reduce the quality of the finished rice product, but also pose a potential threat to consumer food safety.
[0003] Traditional equipment often faces problems such as excessive rice feeding at one time and easy clogging of the screening mechanism when processing large quantities of rice. This not only reduces screening efficiency but also increases equipment maintenance costs. In addition, existing rice stone removal equipment mostly uses a single-level screen plate structure during the screening process. This design has limited screening effect when faced with stones of various sizes mixed in the rice, making it difficult to achieve graded removal of stones.
[0004] Therefore, it is necessary to design a rice stone-picking machine with a multi-stage screening structure. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rice stone-picking machine with a multi-stage screening structure.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A rice stone-picking machine with a multi-stage screening structure includes a housing, the left end of which is closed and the right end is open. A feed box is connected to the upper left side of the housing. The feed box is equipped with a material distribution mechanism inside. The housing is equipped with a multi-stage screening mechanism inside. Two guide mechanisms are provided below the multi-stage screening mechanism.
[0008] As a further improvement of this utility model, the material distribution mechanism includes a rotating shaft disposed inside the feeding box, both ends of which are rotatably connected to the inner wall of the feeding box. A rotating cylinder is fixedly sleeved on the rotating shaft, and multiple storage slots are provided on the side wall of the rotating cylinder. The multiple storage slots are equally spaced along the circumference of the rotating cylinder. A motor is installed on the side wall of the feeding box, and the output shaft of the motor passes through the feeding box and is fixedly connected to the end of the rotating shaft.
[0009] As a further improvement of this utility model, the multi-stage screening mechanism includes a movable frame disposed inside the device housing. A first screen plate and a second screen plate are fixedly disposed vertically inside the movable frame. The aperture of the first screen plate is larger than that of the second screen plate. Both the first screen plate and the second screen plate are inclined downward from left to right. A feed port is provided through the lower right side of the movable frame. A linear vibration motor is fixedly installed in the middle of the lower end of the movable frame.
[0010] As a further improvement of this utility model, the guiding mechanism includes a movable block fixedly connected to the lower end of the movable frame, a guide rod passing through the movable block, the guide rod being slidably connected to the movable block, both ends of the guide rod being fixedly connected to the inner wall of the device housing, and two springs being sleeved on the guide rod, the two springs being located on both sides of the movable block respectively.
[0011] As a further improvement of this utility model, the number of storage tanks is four.
[0012] As a further improvement of this utility model, a feeding hopper located below the feeding port is fixed at the lower end of the movable frame, and a fan is installed at the lower end of the device shell, with the fan facing downwards from the feeding hopper.
[0013] As a further improvement of this utility model, four support columns are fixed to the lower end of the device shell, and the lower ends of the four support columns are fixed to the same base plate.
[0014] As a further improvement of this utility model, a feeding hopper is fixedly connected to the upper end of the feeding box.
[0015] As a further improvement of this utility model, a material collection box, a first stone collection box, and a second stone collection box are arranged on the upper end of the base plate, and the material collection box, the first stone collection box, and the second stone collection box are respectively located below the discharge hopper, the second screen plate, and the first screen plate.
[0016] As a further improvement of this utility model, the upper end of the feed hopper is hinged with a cover plate.
[0017] The beneficial effects of this utility model are:
[0018] By setting up a material distribution mechanism, the rice entering the feed box through the feed hopper will enter the storage trough on the rotating column. The rotation of the rotating drum can drive the rice in the storage trough to fall onto the multi-stage screening mechanism for screening, avoiding excessive rice falling onto the multi-stage screening mechanism at one time, preventing blockage, and ensuring good screening effect.
[0019] By setting up a multi-stage screening mechanism, the rice can be graded and screened using the first and second screen plates, reducing the screening pressure at each stage and thus improving the removal of stones from the rice. At the same time, it can also separate the discharge of stones of different sizes.
[0020] This invention enables uniform feeding of rice, preventing excessive rice from falling onto the multi-stage screening mechanism at once, thus avoiding blockage and ensuring good screening effect. It also enables graded screening, reducing the screening pressure at each stage, thereby improving the destone removal effect of rice, and allowing for the separate discharge of stones of different sizes. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of a rice stone-picking machine with a multi-stage screening structure proposed in this utility model;
[0022] Figure 2 This is a schematic diagram of the material distribution mechanism of a rice stone sorting machine with a multi-stage screening structure proposed in this utility model.
[0023] Figure 3 This is a schematic diagram of the multi-stage screening mechanism and guiding mechanism of a rice stone-picking machine with a multi-stage screening structure proposed in this utility model.
[0024] Figure 4 This is a cross-sectional structural diagram of the movable frame, the first sieve plate, and the second sieve plate of a rice stone-picking machine with a multi-stage screening structure proposed in this utility model.
[0025] Figure 5 This is a schematic diagram of a second embodiment of a rice stone-picking machine with a multi-stage screening structure proposed in this utility model;
[0026] Figure 6 This is a schematic diagram of the third embodiment of a rice stone-picking machine with a multi-stage screening structure proposed in this utility model.
[0027] In the diagram: 1. Device shell, 2. Feed box, 3. Feed hopper, 4. Motor, 5. Support column, 6. Base plate, 7. Fan, 8. Discharge hopper, 9. Movable frame, 10. Rotary drum, 11. Rotary shaft, 12. Storage trough, 13. Movable block, 14. Guide rod, 15. Spring, 16. Linear vibration motor, 17. Discharge port, 18. First screen plate, 19. Second screen plate, 20. Collection box, 21. First stone collection box, 22. Second stone collection box, 23. Cover plate. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0029] Example 1
[0030] Reference Figure 1-4A rice stone-picking machine with a multi-stage screening structure includes a device shell 1, which is closed at the left end and open at the right end. Four support columns 5 are fixed at the lower end of the device shell 1, and the same base plate 6 is fixed at the lower end of the four support columns 5. A feed box 2 is connected to the upper left side of the device shell 1, and a feed hopper 3 is fixedly connected to the upper end of the feed box 2. A material distribution mechanism is provided inside the feed box 2. A multi-stage screening mechanism is provided inside the device shell 1, and two guide mechanisms are provided below the multi-stage screening mechanism.
[0031] In this utility model, the material distribution mechanism includes a rotating shaft 11 disposed inside the feeding box 2. Both ends of the rotating shaft 11 are rotatably connected to the inner wall of the feeding box 2. A rotating cylinder 10 is fixedly sleeved on the rotating shaft 11. Four material storage slots 12 are provided on the side wall of the rotating cylinder 10. The four material storage slots 12 are equally spaced along the circumference of the rotating cylinder 10. A motor 4 is installed on the side wall of the feeding box 2. The output shaft of the motor 4 passes through the feeding box 2 and is fixedly connected to the end of the rotating shaft 11.
[0032] The multi-stage screening mechanism includes a movable frame 9 disposed inside the device housing 1. Inside the movable frame 9, a first screen plate 18 and a second screen plate 19 are fixedly arranged vertically. The aperture of the first screen plate 18 is larger than that of the second screen plate 19. Both the first screen plate 18 and the second screen plate 19 are inclined downward from left to right. A feed port 17 is provided through the lower right side of the movable frame 9. A linear vibration motor 16 is fixedly installed in the middle of the lower end of the movable frame 9. A feed hopper 8 located below the feed port 17 is fixed at the lower end of the movable frame 9. A fan 7 is installed at the lower end of the device housing 1, and the fan 7 faces downward towards the feed hopper 8.
[0033] The guiding mechanism includes a movable block 13 fixedly connected to the lower end of the movable frame 9. A guide rod 14 is provided through the movable block 13 and is slidably connected to the movable block 13. Both ends of the guide rod 14 are fixedly connected to the inner wall of the device housing 1. Two springs 15 are sleeved on the guide rod 14. The two springs 15 are located on both sides of the movable block 13. The springs 15 can provide elastic support for the movable block 13, thereby enabling the movable frame 9 to vibrate.
[0034] In use, the rice to be processed is added to the feed hopper 3 and enters the storage tank 12. Then, the motor 4 is started to drive the rotating shaft 11 to rotate. The rotating shaft 11 drives the rotating drum 10 to rotate. The rotation of the rotating drum 10 can drive the rice in the storage tank 12 to fall onto the first screen plate 18. Then, the linear vibration motor 16 is started to drive the movable frame 9 to vibrate back and forth along the guide rod 14. The first screen plate 18 and the second screen plate 19 can remove stones from the rice. The stone-removed rice falls through the feed hopper 8. At the same time, the blower 7 is started to blow air when the rice falls, which can remove lighter impurities from the rice.
[0035] Example 2
[0036] Reference Figure 5 Compared with Embodiment 1, this embodiment is superior in that the upper end of the bottom plate 6 is provided with a collection box 20, a first stone collection box 21, and a second stone collection box 22. The collection box 20, the first stone collection box 21, and the second stone collection box 22 are respectively located below the hopper 8, the second screen plate 19, and the first screen plate 18. Rice can be collected through the collection box 20, and stones can be collected through the first stone collection box 21 and the second stone collection box 22.
[0037] Example 3
[0038] Reference Figure 6 The advantage of this embodiment compared to the second embodiment is that the upper end of the feed hopper 3 is hinged with a cover plate 23. When not in use, the cover plate 23 can cover the top of the feed hopper 3 to prevent debris from entering the feed hopper 3.
[0039] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A rice stone picker having a multi-stage screening structure, comprising a device housing (1), characterized in that, The left end of the device shell (1) is closed and the right end is open. The upper left side of the device shell (1) is connected to a feed box (2). The feed box (2) is equipped with a material distribution mechanism inside. The device shell (1) is equipped with a multi-stage screening mechanism inside. Two guide mechanisms are provided below the multi-stage screening mechanism.
2. A rice stone picker having a multi-stage screening structure according to claim 1, characterized in that, The material distribution mechanism includes a rotating shaft (11) disposed inside the feeding box (2). Both ends of the rotating shaft (11) are rotatably connected to the inner wall of the feeding box (2). A rotating cylinder (10) is fixedly sleeved on the rotating shaft (11). Multiple storage slots (12) are provided on the side wall of the rotating cylinder (10). The multiple storage slots (12) are equally spaced along the circumference of the rotating cylinder (10). A motor (4) is installed on the side wall of the feeding box (2). The output shaft of the motor (4) passes through the feeding box (2) and is fixedly connected to the end of the rotating shaft (11).
3. A rice stone picker having a multi-stage screening structure according to claim 1, characterized in that, The multi-stage screening mechanism includes a movable frame (9) disposed inside the device housing (1). Inside the movable frame (9) are fixed a first screen plate (18) and a second screen plate (19) arranged vertically. The aperture of the first screen plate (18) is larger than that of the second screen plate (19). The first screen plate (18) and the second screen plate (19) are both inclined downward from left to right. A feed port (17) is provided through the lower right side of the movable frame (9). A linear vibration motor (16) is fixedly installed in the middle of the lower end of the movable frame (9).
4. A rice stone picker having a multi-stage screening structure according to claim 3, characterized in that, The guiding mechanism includes a movable block (13) fixedly connected to the lower end of the movable frame (9). A guide rod (14) is provided through the movable block (13). The guide rod (14) is slidably connected to the movable block (13). Both ends of the guide rod (14) are fixedly connected to the inner wall of the device housing (1). Two springs (15) are sleeved on the guide rod (14). The two springs (15) are located on both sides of the movable block (13).
5. A rice stone picker having a multi-stage screening structure according to claim 2, wherein, The number of the storage tanks (12) is four.
6. A rice stone picker having a multi-stage screening structure according to claim 3, wherein, The lower end of the movable frame (9) is fixed with a feeding hopper (8) located below the feeding port (17), and the lower end of the device housing (1) is equipped with a fan (7) facing downwards from the feeding hopper (8).
7. A rice stone picker having a multi-stage screening structure according to claim 1, wherein, The lower end of the device housing (1) is fixed with four support columns (5), and the lower ends of the four support columns (5) are fixed with the same base plate (6).
8. A rice stone picker having a multi-stage screening structure according to claim 7, characterized in that, The upper end of the feed box (2) is fixedly connected to the feed hopper (3).
9. A rice stone picker having a multi-stage screening structure according to claim 8, characterized in that, The upper end of the base plate (6) is provided with a material collection box (20), a first stone collection box (21), and a second stone collection box (22). The material collection box (20), the first stone collection box (21), and the second stone collection box (22) are respectively located below the hopper (8), the second screen plate (19), and the first screen plate (18).
10. A rice stone picker having a multi-stage screening structure according to claim 9, wherein, The upper end of the feed hopper (3) is hinged with a cover plate (23).