A granulated silicon particle screening device

Abstract

This utility model provides a granulated silicon particle screening device, comprising: a first filter cylinder, a support frame disposed outside the first filter cylinder, a feed tray disposed on the left side of the support frame, a second filter cylinder coaxially sleeved inside the first filter cylinder by a plurality of circumferentially distributed skeletons, a plurality of circumferentially distributed spiral guide plates disposed inside the second filter cylinder, a plurality of circumferentially distributed lifting plates disposed inside the second filter cylinder, and a first discharge plate and a second discharge plate welded and fixed to the inner side of a triangular support. Through the above scheme, by coaxially sleeved the second filter cylinder inside the first filter cylinder, and by setting circumferentially distributed spiral guide plates and lifting plates inside the second filter cylinder, the granulated silicon particles can be fully tumbled and dispersed during the screening process, resulting in a more uniform distribution and more complete contact with the screen during screening. This facilitates finer screening, thereby obtaining higher quality granulated silicon particles and improving screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of particle screening technology, specifically to a granulated silicon particle screening device. Background Technology

[0002] After granulation, silicon particles need to be screened to achieve particle size classification to meet the requirements of various applications. Traditional screening equipment often uses single-layer vibrating screens or rotary screens with uniform screen apertures, making it difficult to achieve multi-stage synchronous classification. This results in multiple machines being connected in series on the production line, leading to a large footprint and high energy consumption. In particular, silicon particles are prone to electrostatic adsorption and agglomeration due to their surface characteristics. During conventional screening, the material flow is poor, and the screen surface is prone to accumulation and blockage, requiring frequent manual intervention and cleaning, which severely restricts the efficiency of continuous production. Furthermore, the current equipment's flow guiding structure often uses fixed inclined plates, resulting in a single material throwing trajectory. This leads to overload in some areas of the screen while underutilizing other areas, causing a double decrease in screening efficiency and accuracy. Utility Model Content

[0003] This utility model provides a granulated silicon particle screening device to solve the problem of low screening efficiency caused by overload or insufficient utilization of existing cylindrical screen areas.

[0004] To solve the above problems, this utility model provides a granulated silicon particle screening device, comprising: a first filter cylinder, a support frame disposed on the outside of the first filter cylinder, a feed plate disposed on the left side of the support frame, a second filter cylinder coaxially sleeved on the inside of the first filter cylinder by a plurality of circumferentially distributed skeletons, a rotating shaft rotating in cooperation with bearings fixedly connected to the skeletons, a motor rotating in cooperation with the rotating shaft and disposed on the support frame, a plurality of spiral guide plates disposed on the inside of the second filter cylinder, a plurality of lifting plates disposed on the inside of the second filter cylinder, and a first discharge plate and a second discharge plate fixed on the inside of the support frame;

[0005] By using the above scheme, by coaxially sleeved a second filter cylinder inside the first filter cylinder, and by setting circumferentially distributed spiral guide plates and lifting plates inside the second filter cylinder, the granulated silicon particles can be fully turned and dispersed during the screening process. This allows the material to be more evenly distributed and to have more full contact with the screen during the screening process, which is conducive to achieving finer screening, thereby obtaining higher quality granulated silicon particles and improving screening efficiency.

[0006] According to one embodiment of the present invention, the screening device further includes a conveyor belt located at the bottom of the support frame and fixed by the support frame. Through the above scheme, the conveyor belt can continuously and automatically transport the screened material to the collection basket without manual intervention. The automated material conveying reduces manual operation, makes the working environment cleaner, reduces the impact of dust on the health of operators, and reduces labor intensity.

[0007] According to one embodiment of this utility model, the first filter cartridge uses round sieve holes, and the second filter cartridge uses rectangular sieve holes. The diameter of the sieve holes in the first filter cartridge is smaller than that in the second filter cartridge. Through the above scheme, a multi-stage screening structure is formed. The material first passes through the second filter cartridge with larger sieve holes for preliminary screening, where larger particles are intercepted and smaller particles pass through. Then, the remaining material enters the first filter cartridge for secondary fine screening, further separating smaller particles. By combining sieve holes of different shapes and sizes, granulated silicon particles can be more accurately graded according to particle size, meeting the production needs of products with different particle sizes.

[0008] According to one embodiment of this utility model, the spiral guide plate is axially arranged along the inner wall of the second filter cylinder on the right side of the feed plate, and the lifting plates are spaced apart on the right side of the spiral guide plate. With the above scheme, when the material enters the second filter cylinder from the feed plate, the spiral guide plate can guide the material, so that the material flows orderly into the filter cylinder along the spiral trajectory of the spiral guide plate, avoiding the accumulation and blockage of the material at the feed inlet, and ensuring the continuity and stability of the material conveying; the lifting plates can lift the material upward, so that the material forms a parabolic motion trajectory in the filter cylinder, increasing the contact area between the material and the air and the mutual collision and friction between the materials, which helps to break the agglomeration of the materials, so that the material particles are fully dispersed and the screening efficiency is improved.

[0009] According to one embodiment of this utility model, the lifting plate adopts an L-shaped bending structure with a bending angle of 80~100°. Through the above scheme, the lifting plate can more effectively throw the material upward when the second filter cylinder rotates. The specific bending angle and structure enable the lifting plate to cover a wider area during rotation, throwing the material into a larger space within the filter cylinder. This helps the material to be evenly distributed within the filter cylinder, avoids local material accumulation, and allows more material to have the opportunity to contact the screen holes, further improving the uniformity and comprehensiveness of screening.

[0010] According to one embodiment of the present invention, the aforementioned lifting plates are arranged in a double-plate symmetrical spiral arrangement on the circumferential inner wall of the second filter cylinder. Through the above scheme, the double-plate symmetrical spiral arrangement forms a regular and continuous material conveying channel. When the second filter cylinder rotates, the material can be driven and conveyed in an orderly manner along the spiral trajectory, avoiding the local accumulation or blockage of material in the filter cylinder, making the material conveying process smoother and improving the flow efficiency of material in the device.

[0011] According to one embodiment of this utility model, the inclination angle difference between the first discharge plate and the second discharge plate is controlled within the range of 8~15°, and the minimum gap between the two plates is greater than three times the diameter of the largest silicon particle. This design avoids material jamming or clogging during the discharge process due to unsuitable angles or excessively small gaps. The material can flow continuously from the gap between the two plates, ensuring continuous discharge and enabling timely and stable output of the screened material, meeting the continuous screening requirements of the production process.

[0012] The technical advantages of this application are as follows:

[0013] This application provides a granulated silicon particle screening device. By coaxially sleeved a second filter cylinder inside a first filter cylinder, and circumferentially distributed spiral guide plates and lifting plates inside the second filter cylinder, the granulated silicon particles can be fully tumbled and dispersed during the screening process. This allows the material to be more evenly distributed and to have more full contact with the screen during screening, which is conducive to achieving finer screening, thereby obtaining higher quality granulated silicon particles and improving screening efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a granulation silicon particle screening device provided by this utility model.

[0015] Figure 2 This is a schematic diagram of the left-side view of a granulation silicon particle screening device provided by this utility model.

[0016] Figure 3 This utility model provides Figure 2 Schematic diagram of the cross-sectional structure at point AA.

[0017] Figure 4 This is a schematic diagram of the right-side view of the screen structure of a granulation silicon particle screening device provided by this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Feed tray; 2. First filter cartridge; 3. Second filter cartridge; 4. Frame; 5. Motor; 6. Triangular bracket; 7. Second discharge plate; 8. First discharge plate; 9. Conveyor belt; 10. Support frame; 11. Spiral guide plate; 12. Lifting plate; 13. Rotating shaft; 14. Support frame. Detailed Implementation

[0020] The following will be combined with the appendix Figures 1-4 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to illustrate the technical solution of this application more clearly, and are therefore only examples and should not be used to limit the scope of protection of this application.

[0021] Reference Figures 1-4 This utility model provides a granulated silicon particle screening device, comprising: a first filter cylinder 2, a support frame 10 disposed on the outside of the first filter cylinder 2, a feed plate 1 disposed on the left side of the support frame 10, a second filter cylinder 3 coaxially sleeved on the inside of the first filter cylinder 2 by a plurality of circumferentially distributed skeletons 4, a rotating shaft 13 rotating in cooperation with bearings fixedly connected to the skeletons 4, a motor 5 rotating in cooperation with the rotating shaft 13, a triangular bracket 6 disposed below the motor 5 and on the side of the support frame 10, a plurality of spiral guide plates 11 disposed circumferentially inside the second filter cylinder 3, a plurality of lifting plates 12 disposed circumferentially inside the second filter cylinder 3, and a first discharge plate 8 and a second discharge plate 7 welded and fixed to the inside of the triangular bracket 6;

[0022] By using the above scheme, by coaxially sleeved a second filter cylinder 3 inside the first filter cylinder 2, and by setting a circumferentially distributed spiral guide plate 11 and lifting plate 12 inside the second filter cylinder 3, the granulated silicon particles can be fully turned over and dispersed during the screening process, so that the material can be more evenly distributed and more fully contacted with the screen during the screening process, which is conducive to achieving finer screening and improving screening efficiency.

[0023] The screening device also includes a conveyor belt 9 located at the bottom of the support frame 10 and fixed by the support frame 14. Through the above scheme, the conveyor belt 9 enables the screened material to be continuously and automatically transported to the collection basket without manual intervention. The automated material conveying reduces manual operation, makes the working environment cleaner, reduces the impact of dust on the health of operators, and reduces labor intensity.

[0024] The first filter cartridge 2 uses round sieve holes, and the second filter cartridge 3 uses rectangular sieve holes. The diameter of the sieve holes in the first filter cartridge 2 is smaller than that in the second filter cartridge 3. Through this scheme, a multi-stage screening structure is formed. The material first passes through the second filter cartridge 3 with larger sieve holes for preliminary screening, where larger particles are intercepted and smaller particles pass through. Then, the remaining material enters the first filter cartridge 2 for secondary fine screening, further separating smaller particles. By combining sieve holes of different shapes and sizes, granulated silicon particles can be more accurately graded according to particle size, meeting the production needs of products with different particle sizes.

[0025] The aforementioned spiral guide plate 11 is axially arranged along the inner wall of the second filter cylinder 3 on the right side of the feed pan 1, and the lifting plates 12 are spaced apart on the right side of the spiral guide plate 11. Through the above scheme, when the material enters the second filter cylinder 3 from the feed pan 1, the spiral guide plate 11 can guide the material, so that the material flows orderly into the filter cylinder along the spiral trajectory of the spiral guide plate 11, avoiding the accumulation and blockage of the material at the feed inlet, and ensuring the continuity and stability of the material conveying; the lifting plates 12 can lift the material upward, so that the material forms a parabolic motion trajectory in the filter cylinder, increasing the contact area between the material and the air and the mutual collision and friction between the materials, which helps to break the agglomeration between the materials, so that the material particles are fully dispersed and the screening efficiency is improved.

[0026] The aforementioned lifting plate 12 adopts an L-shaped bending structure with a bending angle of 80~100°. Through this scheme, the lifting plate 12 can more effectively throw the material upward when the second filter cylinder 3 rotates. The specific bending angle and structure enable the lifting plate 12 to cover a wider area during rotation, throwing the material into a larger space within the filter cylinder. This helps the material to be evenly distributed within the filter cylinder, avoids local material accumulation, and allows more material to come into contact with the screen holes, further improving the uniformity and comprehensiveness of screening.

[0027] The aforementioned lifting plates 12 are arranged in a double-plate symmetrical spiral pattern on the inner wall of the second filter cylinder 3. Through the above scheme, the double-plate symmetrical spiral arrangement forms a regular and continuous material conveying channel. When the second filter cylinder 3 rotates, the material can be driven and conveyed in an orderly manner along the spiral trajectory, avoiding local accumulation or blockage of the material in the filter cylinder, making the material conveying process smoother and improving the flow efficiency of the material in the device.

[0028] The inclination angle difference between the first discharge plate 8 and the second discharge plate 7 is controlled within the range of 8~15°, and the minimum gap between the two plates is greater than three times the diameter of the largest silicon particle. This design avoids material jamming or clogging during discharge due to unsuitable angles or excessively small gaps. The material can flow continuously from the gap between the two plates, ensuring continuous discharge and enabling timely and stable output of the screened material, meeting the continuous screening requirements of the production process.

[0029] Working principle:

[0030] Granulated silicon particles enter the second filter cylinder 3 from the feed tray 1. The spiral guide plate 11 on the inner wall of the second filter cylinder 3 guides the material to flow into the filter cylinder along the spiral trajectory, avoiding accumulation or blockage at the feed inlet.

[0031] Motor 5 drives rotating shaft 13, causing the second filter cylinder 3 and the first filter cylinder 2 to rotate. The L-shaped lifting plate 12 rotates with the filter cylinders, throwing the material upwards in a parabolic trajectory. During this throwing process, the material collides and rubs against each other, breaking up agglomerates and improving particle dispersion. Larger particles that cannot pass through the rectangular sieve holes of the second filter cylinder 3 continue to move within the second filter cylinder 3 and are eventually discharged from the second discharge plate 7 at the discharge end.

[0032] Smaller particles that can pass through the sieve holes of the second filter cylinder 3 enter the first filter cylinder 2. The combined rotation of the first filter cylinder 2 and the second filter cylinder 3 drives the internal material to continue moving. Even smaller particles that can pass through the round holes of the first filter cylinder 2 are discharged from the first filter cylinder 2 and fall onto the conveyor belt 9. The conveyor belt 9 transports the fine particles in the discharge direction and automatically conveys them to the collection basket, realizing continuous operation. Medium-sized particles that cannot pass through the sieve holes of the first filter cylinder 2 are discharged from the first discharge plate 8 at the discharge end of the first filter cylinder 2. The particles discharged from the first discharge plate 8 are qualified particles with a particle size of 2~5mm.

[0033] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A granulated silicon particle screening apparatus, characterized by, include: A first filter cartridge (2), a support frame (10) located outside the first filter cartridge (2), a feed tray (1) located on the left side of the support frame (10), a second filter cartridge (3) coaxially sleeved inside the first filter cartridge (2) by a plurality of circumferentially distributed skeletons (4), a rotating shaft (13) rotating in cooperation with a bearing fixedly connected to the skeleton (4), a motor (5) rotating in cooperation with the rotating shaft (13) and located on the support frame (10), a plurality of spiral guide plates (11) circumferentially distributed inside the second filter cartridge (3), a plurality of lifting plates (12) circumferentially distributed inside the second filter cartridge (3), and a first discharge plate (8) and a second discharge plate (7) fixed inside the support frame (10).

2. The prilled silicon particles screening apparatus according to claim 1, wherein, Also includes: A conveyor belt (9) located at the bottom of the support frame (10) and fixed by a support frame (14).

3. The prilled silicon particles screening apparatus of claim 1, wherein, The first filter cartridge (2) has round holes, and the second filter cartridge (3) has rectangular holes. The diameter of the holes in the first filter cartridge (2) is smaller than the diameter of the holes in the second filter cartridge (3).

4. The prilled silicon particles screening apparatus of claim 1, wherein, The spiral guide plate (11) is axially arranged on the right side of the feed plate (1) along the inner wall of the second filter cylinder (3), and the lifting plate (12) is spaced apart on the right side of the spiral guide plate (11).

5. The granulated silicon particle screening apparatus of claim 1, wherein, The lifting plate (12) adopts an L-shaped bending structure with a bending angle of 80~100°.

6. The granulated silicon particle screening apparatus of claim 5, wherein, The lifting plates (12) are arranged in a double-plate symmetrical spiral pattern on the inner wall of the second filter cylinder (3).

7. The prilled silicon particles screening apparatus of claim 1, wherein, The tilt angle difference between the first discharge plate (8) and the second discharge plate (7) is controlled within the range of 8~15°, and the minimum gap between the two plates is greater than 3 times the diameter of the maximum silicon particle.

Images