A particle size sorting device for miscellaneous grain powder

Abstract

This invention discloses a grain powder particle size sorting device, belonging to the technical field of grain powder sorting devices. It includes a base and a distribution box, with a first frame, a second frame, and a third frame fixedly installed on top of the base. This grain powder particle size sorting device receives and transports grain particles through a conveying mechanism and a receiving hopper. The conveying mechanism drives the receiving hopper to move in a V-shaped trajectory above the crushing box, facilitating the dispersion and conveying of grain particles. This ensures uniform distribution of grain particles on the crushing roller assembly, reducing local concentration and improving crushing efficiency, uniformity, and sorting quality. While the conveying mechanism moves the receiving hopper, a scraper rotates and scrapes the inner wall of the hopper, preventing grain adhesion and stagnation, improving grain flowability, and reducing energy consumption while improving conveying efficiency and quality.

Description

Technical Field

[0001] This invention relates to the technical field of grain powder sorting devices, specifically a grain powder particle size sorting device. Background Technology

[0002] Coarse grains refer to a collective term for various cereals, beans, and tubers other than staple grain crops. These typically include sorghum, millet, oats, buckwheat, red beans, mung beans, black beans, and soybeans. In the processing of coarse grains, a particle size sorting device is used. This highly efficient processing equipment is mainly used to separate coarse grain powders of different particle sizes to meet various production needs. The device usually includes multiple functional modules such as crushing, grading, and collection. First, the crushing module is responsible for the preliminary crushing of large coarse grain powder particles, reducing their particle size to make them suitable for subsequent grading.

[0003] However, in existing grain powder particle size separation devices, the feeding hoppers are basically fixed on both sides of the top of the crushing box or in the middle of the crushing box, or a diverter plate is set at the feed inlet of the crushing box. However, during feeding, the material can only fall along the same path. This single feeding method easily causes the material to accumulate inside the crushing box, resulting in concentrated accumulation of material in local areas, which may affect the crushing effect and easily lead to uneven crushing. This not only affects the processing efficiency of the material, but may also lead to uneven particle size distribution of the finished powder. Therefore, we propose a grain powder particle size separation device. Summary of the Invention

[0004] The purpose of this invention is to provide a grain powder particle size sorting device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a grain powder particle size sorting device, comprising a base and a distribution box, wherein a first frame, a second frame, and a third frame are fixedly installed on the top of the base, and the second frame is located between the first and second frames; a storage bin is installed above the first frame; a crushing box is bolted to the middle of the second frame; the distribution box is connected below the crushing box; a conveying mechanism is provided above the crushing box; and both the first and third frames are connected to the conveying mechanism. The conveying mechanism includes components bolted to... The cover plate above the crushing box has a through V-shaped groove on its inner side. Guide rods and electric guide rails are fixedly connected to the adjacent side of the No. 1 and No. 3 frames. Electric sliders are electrically connected inside the electric guide rails. A slide frame is fixedly connected to the upper part of the electric slider. Support plates are fixedly connected to both ends of the slide frame. A receiving hopper is provided on one side of the support plate. Sliding rods are fixedly connected to both sides of the receiving hopper. A strip-shaped groove for sliding of the sliding rods is provided on the inner side of the support plate. A scraper is provided on the inner side of the receiving hopper. A toothed ring is slidably sleeved on the outer side of the receiving hopper.

[0006] Preferably, a ball bearing is movably sleeved on the inner wall of the receiving hopper near the toothed ring, and a bulk material block is fixedly connected to the bottom end of the scraper.

[0007] Preferably, an L-shaped plate is fixed above the support plate, and cylindrical blocks are fixed on one side of the L-shaped plate at equal intervals, with the cylindrical blocks and the toothed ring being meshed.

[0008] Preferably, a crushing roller assembly is installed in the inner cavity of the crushing box, a baffle is fixed on the inner wall of the corner of the crushing box, and the baffle is located at the bottom opening of the receiving hopper. A discharge assembly is installed at the bottom of the storage bin above the receiving hopper.

[0009] Preferably, the material distribution box is equipped with a screen inside, and a feeding chute is opened in the middle of both the crushing box and the material distribution box. A discharge port is opened on one inner wall of the material distribution box, and a discharge plate is installed on the side of the material distribution box near the discharge port.

[0010] Preferably, a screening mechanism is connected to one side of the screen, and the screening mechanism is located outside the distribution box. The screening mechanism includes a drive shaft connected to one side of the screen, and the drive shaft is connected to the inner wall of the distribution box through a bearing.

[0011] Preferably, a second swing rod is fixedly connected to one end of the drive shaft, a guide plate is provided above the screen, and a rotating shaft is connected to both ends of the guide plate. The rotating shaft is connected to the material distribution box through bearings.

[0012] Preferably, one end of the rotating shaft is fixedly connected to a first swing rod, and a motor is fixedly installed on the outer wall of the material distribution box near the first swing rod. One end of the motor is connected to a turntable via a coupling.

[0013] Preferably, a round rod is fixed on the surface of the turntable, and traction grooves are provided on the inner sides of the first and second swing rods to allow the round rod to slide.

[0014] Preferably, a support block is fixed on the side of the screen near the drive shaft, and an arc-shaped groove is formed on the inner wall of the distribution box to allow the support block to slide.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This grain powder particle size sorting device receives and conveys grain particles through a feeding mechanism and a receiving hopper. The feeding mechanism can drive the receiving hopper to move in a V-shaped trajectory above the crushing box, which facilitates the dispersion and conveying of grain particles. This enables the grain particles to be evenly distributed on the crushing roller assembly, reduces the phenomenon of local concentration, improves crushing efficiency and crushing uniformity, and improves the sorting quality of grains.

[0017] 2. In this grain powder particle size sorting device, while the conveying mechanism drives the receiving hopper to move, the scraper can rotate and scrape the inner wall of the receiving hopper, which can prevent grain from sticking and stagnating, improve the flowability of grain, and at the same time, the loose material block can divert the grain falling from the receiving hopper to ensure that the material can flow smoothly and reduce the possibility of blockage. Moreover, there is no need to set up an additional electric drive structure. The scraper can be combined with the V-shaped trajectory movement of the receiving hopper, which improves the conveying efficiency and quality while reducing energy consumption.

[0018] 3. In this grain powder particle size sorting device, the screening mechanism drives the screen and guide plate to rotate and swing simultaneously. The movement of the screen increases the chance of the grain powder coming into contact with the screen surface, which promotes the rapid passage of small-sized powder through the screen holes. The guide plate can guide and divert the grain powder to the left and right, which can avoid the situation where the feeding speed is too fast and a large amount of grain powder accumulates on the screen surface, thus improving the stability and efficiency of screening. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the first frame of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the storage silo of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the material conveying mechanism of the present invention;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the L-shaped plate of the present invention;

[0024] Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the receiving hopper of the present invention;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the toothed ring of the present invention;

[0026] Figure 8 This is a schematic diagram of the three-dimensional structure of the crushing box of the present invention;

[0027] Figure 9 This is a schematic diagram of the three-dimensional structure of the feeding trough of the present invention;

[0028] Figure 10 This is a schematic diagram of the three-dimensional cross-sectional structure of the material distribution box of the present invention;

[0029] Figure 11 This is a schematic diagram of the three-dimensional structure of the arc-shaped groove of the present invention;

[0030] Figure 12 This is a three-dimensional structural diagram of the screening mechanism of the present invention;

[0031] Figure 13 This is a schematic diagram of the three-dimensional structure of the second pendulum rod of the present invention;

[0032] Figure 14 This is a schematic diagram of the three-dimensional structure of the bulk material block of the present invention.

[0033] In the diagram: 1. Base; 2. Frame 1; 3. Storage bin; 4. Frame 2; 5. Crushing box; 6. Conveying mechanism; 601. Guide rod; 602. Support plate; 603. Slide rod; 604. Strip chute; 605. V-shaped chute; 606. Cover plate; 607. Electric guide rail; 608. Electric slider; 609. Carriage; 7. Distribution box; 8. Screening mechanism; 801. Swing rod 1; 802. Turntable; 803. Round rod; 804. Traction rod. 805. Guide chute; 806. No. 2 swing arm; 807. Drive shaft; 9. No. 3 frame; 10. Motor; 11. Support block; 12. Guide plate; 13. Rotating shaft; 14. Screen; 15. L-shaped plate; 16. Cylindrical block; 17. Gear ring; 18. Receiving hopper; 19. Scraper; 20. Loose material block; 21. Ball bearing; 22. Baffle; 23. Crushing roller assembly; 24. Feed chute; 25. Discharge port; 26. Discharge plate; 27. Arc-shaped chute; 28. Unloading assembly. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-4 and Figure 8 The present invention provides a technical solution: a grain powder particle size sorting device, including a base 1 and a distribution box 7. A first frame 2, a second frame 4 and a third frame 9 are fixedly installed on the top of the base 1, and the second frame 4 is located between the first frame 2 and the second frame 4. A storage bin 3 is installed on the top of the first frame 2. A crushing box 5 is bolted to the middle of the second frame 4. The distribution box 7 is connected to the bottom of the crushing box 5. A crushing roller assembly 23 is installed in the inner cavity of the crushing box 5. A discharge assembly 28 is installed at the bottom of the storage bin 3 above the receiving hopper 18.

[0036] This is a grain powder particle size separation device, based on Figures 1-3 As is known, the first frame 2 provides stable support for the storage bin 3, and the second frame 4 provides support for the crushing box 5. By separating the storage bin 3 and the crushing box 5, the top of the crushing box 5 can be prevented from bearing a large pressure. The storage bin 3 is used to store a large amount of grain particles. By opening and closing the unloading component 28, the grain enters the receiving hopper 18, and then carries the grain particles into the interior of the crushing box 5, so that the crushing roller component 23 can quickly crush the grain particles into grain powder.

[0037] Please see Figures 1-4 The crushing box 5 is provided with a material conveying mechanism 6 above it, and the first frame 2 and the third frame 9 are both connected to the material conveying mechanism 6. The material conveying mechanism 6 includes a cover plate 606 that is bolted to the top of the crushing box 5.

[0038] This is a grain powder particle size separation device, based on Figures 1-4 It can be seen that the conveying mechanism 6 on the crushing box 5 disperses and conveys the grain particles. The cover plate 606 is installed above the crushing box 5, which can prevent a large amount of grain particles from splashing out and guide the movement of the hopper 18.

[0039] Please see Figures 2-4 A guide rod 601 and an electric guide rail 607 are fixedly connected to one side of the first frame 2 and the third frame 9. An electric slider 608 is electrically connected inside the electric guide rail 607. A slide 609 is fixedly connected to the upper part of the electric slider 608. Support plates 602 are fixedly connected to both ends of the slide 609.

[0040] This is a grain powder particle size separation device, based on Figures 2-4 As is known, the electric guide rail 607 drives the electric slider 608 to slide, the slider 608 then drives the slide 609 to move, the slide 609 slides on the outside of the guide rod 601, and at the same time the slide 609 drives the support plate 602 to move, and then the support plate 602 drives the receiving hopper 18 to move, which can facilitate the dispersing and conveying of materials by the receiving hopper 18.

[0041] Please see Figures 2-4 The inner side of the cover plate 606 is provided with a through V-shaped groove 605. The support plate 602 is provided with a receiving hopper 18 on one side. The two sides of the receiving hopper 18 are fixedly connected with sliding rods 603. The inner side of the support plate 602 is provided with a strip-shaped groove 604 for the sliding rods 603 to slide. The inner wall of the corner of the crushing box 5 is fixed with a baffle 22, and the baffle 22 is located at the bottom opening of the receiving hopper 18.

[0042] This is a grain powder particle size separation device, based on Figures 2-4 As is known, when the support plate 602 drives the receiving hopper 18 to move, the bottom end of the receiving hopper 18 disengages from the baffle 22. The baffle 22 is used to shield the bottom end of the receiving hopper 18 when it is receiving material, so as to prevent the grains from leaking out from the bottom end of the receiving hopper 18 while it is still receiving material.

[0043] The receiving hopper 18 is squeezed by the inclined surface of the V-shaped chute 605, causing the bottom end of the receiving hopper 18 to slide along the V-shaped chute 605. Since the lateral movement of the receiving hopper 18 is restricted by the support plate 602, the receiving hopper 18 can only drive the slide rod 603 to move laterally along the strip chute 604 while sliding along the V-shaped chute 605. Due to the longitudinal sliding of the electric slider, the receiving hopper 18 can disperse the material along the V-shaped chute 605. By moving the receiving hopper 18 along the V-shaped trajectory, the grain particles can be evenly distributed on the crushing roller assembly 23, reducing the phenomenon of local concentration, improving crushing efficiency and crushing uniformity, as well as the sorting quality of the grain.

[0044] Please see Figures 4-7 and Figure 14 The inner side of the receiving hopper 18 is provided with a scraper 19, and the outer side of the receiving hopper 18 is slidably sleeved with a toothed ring 17. A ball bearing 21 is movably sleeved on the inner wall of the receiving hopper 18 near the toothed ring 17. A loose material block 20 is fixedly connected to the bottom end of the scraper 19. An L-shaped plate 15 is fixed above the support plate 602. Cylindrical blocks 16 are evenly distributed on one side of the L-shaped plate 15, and the cylindrical blocks 16 and the toothed ring 17 are meshed.

[0045] This is a grain powder particle size separation device, based on Figures 4-7As is known, when the receiving hopper 18 moves laterally on the support plate 602, the receiving hopper 18 will drive the toothed ring 17 to move. Since the toothed ring 17 is meshed with the cylindrical block 16, the toothed ring 17 will rotate along the cylindrical block 16. At the same time, the toothed ring 17 drives the scraper 19 to rotate. The setting of the ball bearing 21 can reduce the friction between the toothed ring 17 and the receiving hopper 18, making it easier for the toothed ring 17 to rotate. In addition, the cylindrical block 16 is relatively smooth, which can reduce friction loss and make it easier for the toothed ring 17 to move and rotate with the receiving hopper 18.

[0046] The rotation of the scraper 19 can scrape the inner wall of the receiving hopper 18, which can prevent the grains from sticking and stagnating, and improve the flowability of the grains. At the same time, the loose material block 20 can divert the grains falling from the receiving hopper 18, ensuring that the material can flow smoothly and reducing the possibility of blockage. Moreover, there is no need to set up an additional electric drive structure. The scraper 19 can be combined with the V-shaped trajectory movement of the receiving hopper 18, which improves the efficiency and quality of material conveying while reducing energy consumption.

[0047] Please see Figure 1 , Figure 2 , Figure 9 , Figure 10 and Figure 12 The material distribution box 7 is equipped with a screen 14 inside. Both the crushing box 5 and the material distribution box 7 have a feeding trough 24 in the middle. The material distribution box 7 has a discharge port 25 on one inner wall. The material distribution box 7 is equipped with a discharge plate 26 on the side near the discharge port 25. The material distribution box 7 is equipped with a door panel on the outside.

[0048] This is a grain powder particle size separation device, based on Figure 9 , Figure 10 and Figure 12 After the grains are crushed into powder in the crushing box 5, the grain powder falls from the feeding chute 24 into the distribution box 7, and is screened into two particle sizes by the screen 14. The screened powder slides from the discharge port 25 to the discharge plate 26 and is finally discharged through the discharge plate 26. The grain powder blocked above the screen 14 can be taken out later by opening the door of the distribution box 7, which is convenient and quick.

[0049] Please see Figure 9 , Figure 10 and Figures 11-13 The screen 14 is connected to a screening mechanism 8 on one side, and the screening mechanism 8 is located outside the distribution box 7. The screening mechanism 8 includes a drive shaft 806 connected to one side of the screen 14. The drive shaft 806 is connected to the inner wall of the distribution box 7 through a bearing. One end of the drive shaft 806 is fixedly connected to a second swing rod 805. The two sides of the screen 14 that contact the inner wall of the distribution box 7 are designed with an arc structure.

[0050] This is a grain powder particle size separation device, based on Figure 9 , Figure 10 and Figures 11-13 As is known, when the second swing arm 805 rotates, it can drive the transmission shaft 806 to rotate, and then the transmission shaft 806 drives the screen 14 to rotate. Since the two sides of the screen 14 that contact the inner wall of the distribution box 7 are designed with an arc structure, the inner wall of the distribution box 7 can avoid affecting the rotation and swing of the screen 14. The movement of the screen 14 can increase the chance of the mixed grains contacting the surface of the screen 14, and promote the rapid passage of small particles through the screen holes of the screen 14, thereby improving the screening efficiency.

[0051] Please see Figure 9 , Figure 10 , Figure 12 and Figure 13 A guide plate 12 is provided above the screen 14. Both ends of the guide plate 12 are connected to a rotating shaft 13. The rotating shaft 13 is connected to the material distribution box 7 through a bearing. One end of the rotating shaft 13 is fixedly connected to a swing rod 801.

[0052] This is a grain powder particle size separation device, based on Figure 9 , Figure 10 , Figure 12 and Figure 13 It can be seen that the first swing rod 801 drives the rotating shaft 13 to rotate, and the rotating shaft 13 then drives the guide plate 12 to rotate and swing. The grain powder falling from the feed chute 24 first contacts the surface of the guide plate 12, and then the guide plate 12 guides and diverts the grain powder to the left and right, which can avoid the situation where the feeding speed is too fast and a large amount of grain powder accumulates on the surface of the screen 14, thus improving the stability of screening. The rotation and swing of the guide plate 12 and the screen 14 are carried out simultaneously, and the swing directions of the guide plate 12 and the screen 14 are opposite, which increases the effective screening area of ​​the screen 14 and enhances the separation effect of the material.

[0053] Please see Figures 9-13 A motor 10 is fixedly installed on the outer wall of the material distribution box 7 near the first swing rod 801. One end of the motor 10 is connected to a turntable 802 via a coupling. A round rod 803 is fixed on the surface of the turntable 802. Traction grooves 804 are provided on the inner sides of the first swing rod 801 and the second swing rod 805 to allow the round rod 803 to slide. The first swing rod 801 is located on one side of the second swing rod 805.

[0054] This is a grain powder particle size separation device, based on Figures 9-13As is known, when the motor 10 is started, the motor 10 drives the turntable 802 to rotate, and the turntable 802 drives the round rod 803 to rotate. The round rod 803 slides in the traction groove 804, so that the round rod 803 pushes and pulls the first swing rod 801 and the second swing rod 805 to rotate. Since the first swing rod 801 is located on one side of the second swing rod 805, only one round rod 803 is needed to drive the first swing rod 801 and the second swing rod 805 to rotate simultaneously.

[0055] Please see Figure 11 and Figure 12 A support block 11 is fixed on the side of the screen 14 near the drive shaft 806. An arc-shaped groove 27 is provided on the inner wall of the material distribution box 7 so that the support block 11 can slide. The support block 11 is symmetrically arranged on the surface of the screen 14.

[0056] This is a grain powder particle size separation device, based on Figure 11 and Figure 12 As is known, while the screen 14 rotates and swings, it can drive the support block 11 to slide in the arc groove 27. The arc groove 27 guides the sliding of the support block 11, which can improve the stability of the screen 14.

[0057] In summary, when using this grain powder particle size sorting device, the opening of the unloading component 28 allows the grain particles to fall into the receiving hopper 18. Then, the conveying mechanism 6 drives the receiving hopper 18 to move above the crushing box 5. At the same time, the receiving hopper 18 slides in a V-shaped trajectory to convey and disperse the grain particles. The toothed ring 17 and the cylindrical block 16 drive the scraper 19 to rotate, scraping the inner wall of the receiving hopper 18 while dispersing the material, preventing the grain particles from adhering and stagnating. Then, the crushing roller assembly 23 crushes the grain particles into powder, which then enters the distribution box 7 through the feeding chute 24. The screening mechanism 8 and the screen 14 then screen the grain powder, separating it into two particle sizes. Finally, the powder is discharged through the discharge port 25 and the door panel of the distribution box 7. The conveying mechanism 6 and the screening mechanism 8 improve the crushing and sorting efficiency of the grain powder particle size sorting device. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0058] 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 grain powder particle size sorting device, comprising a base (1) and a distribution box (7), wherein a first frame (2), a second frame (4) and a third frame (9) are fixedly installed above the base (1), and the second frame (4) is located between the first frame (2) and the second frame (4), and a storage bin (3) is installed above the first frame (2), characterized in that: A crushing box (5) is bolted to the middle of the second frame (4). The material distribution box (7) is connected to the bottom of the crushing box (5). A conveying mechanism (6) is provided above the crushing box (5). The first frame (2) and the third frame (9) are both connected to the conveying mechanism (6). The conveying mechanism (6) includes a cover plate (606) bolted to the top of the crushing box (5). A through V-shaped groove (605) is provided on the inner side of the cover plate (606). The first frame (4) is bolted to the middle of the crushing box (5). A guide rod (601) and an electric guide rail (607) are fixedly connected to one side of the machine frame (2) and the third machine frame (9). An electric slider (608) is electrically connected inside the electric guide rail (607). A slide frame (609) is fixedly connected to the upper part of the electric slider (608). Support plates (602) are fixedly connected to both ends of the slide frame (609). A receiving hopper (18) is provided on one side of the support plate (602). Slide frames (609) are fixedly connected to both sides of the receiving hopper (18). The rod (603) has a strip groove (604) on the inner side of the support plate (602) for sliding the rod (603). The inner side of the receiving hopper (18) is provided with a scraper (19). A toothed ring (17) is slidably sleeved on the outer side of the receiving hopper (18). An L-shaped plate (15) is fixed above the support plate (602). Cylindrical blocks (16) are evenly distributed on one side of the L-shaped plate (15), and the cylindrical blocks (16) and the toothed ring (17) are meshed together. The receiving hopper (18) has a ball bearing (21) movably sleeved on the inner wall near the toothed ring (17). The bottom end of the scraper (19) is fixedly connected to a loose material block (20). The crushing box (5) is equipped with a crushing roller assembly (23). The inner wall of the crushing box (5) is fixed with a baffle (22), and the baffle (22) is located at the bottom opening of the receiving hopper (18). The bottom of the storage bin (3) is located above the receiving hopper (18) and a discharge assembly (28) is installed.

2. The grain powder particle size sorting device according to claim 1, characterized in that: The material distribution box (7) is equipped with a screen (14) inside. The crushing box (5) and the material distribution box (7) are both provided with a feeding trough (24) in the middle. The material distribution box (7) is provided with a discharge port (25) on one side of its inner wall. The material distribution box (7) is equipped with a discharge plate (26) on the side near the discharge port (25).

3. The grain powder particle size sorting device according to claim 2, characterized in that: A screening mechanism (8) is connected to one side of the screen (14), and the screening mechanism (8) is located outside the distribution box (7). The screening mechanism (8) includes a drive shaft (806) connected to one side of the screen (14). The drive shaft (806) is connected to the inner wall of the distribution box (7) through a bearing.

4. The grain powder particle size sorting device according to claim 3, characterized in that: One end of the drive shaft (806) is fixedly connected to a second swing rod (805). A guide plate (12) is provided above the screen (14). Both ends of the guide plate (12) are connected to a rotating shaft (13). The rotating shaft (13) is connected to the material distribution box (7) through a bearing.

5. The grain powder particle size sorting device according to claim 4, characterized in that: One end of the rotating shaft (13) is fixedly connected to a first swing rod (801). A motor (10) is fixedly installed on the outer wall of the material distribution box (7) near the first swing rod (801). One end of the motor (10) is connected to a turntable (802) via a coupling.

6. The grain powder particle size sorting device according to claim 5, characterized in that: A round rod (803) is fixed on the surface of the turntable (802), and traction grooves (804) are opened on the inner sides of the first swing rod (801) and the second swing rod (805) to allow the round rod (803) to slide.

7. The grain powder particle size sorting device according to claim 6, characterized in that: The screen (14) is fixed with a support block (11) on the side near the drive shaft (806), and the inner wall of the distribution box (7) has an arc-shaped groove (27) for the support block (11) to slide.

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