Multi-section superfine silica powder grading and screening machine

Abstract

This utility model relates to the field of silicon micropowder screening technology and discloses a multi-stage ultrafine silicon micropowder grading and screening machine, including a base frame. A groove is formed on the inner wall of the base frame, and a pulley is slidably connected within the groove. A connecting frame is fixedly connected to the end of each pulley. Multiple connecting frames are provided, and screening hoppers are fixedly connected between the multiple connecting frames. A screening plate is installed on the bottom surface of each screening hopper, and a feeding hopper is connected to the end of each screening hopper. Screening components and a scraping component are installed on the base frame. This utility model adopts a multi-layered structure of screening hoppers and screening plates, with the sieve apertures of the screening plates distributed according to an arithmetic progression, forming a multi-stage screening system. This design allows silicon micropowder to be precisely separated according to particle size when passing through each layer of screening components. Particles of different sizes are screened at their corresponding levels. Compared with traditional single-stage screening methods, this improves the grading accuracy and efficiency, and can meet the stringent particle size grading requirements for ultrafine silicon micropowder.

Description

Technical Field

[0001] This utility model relates to the field of silicon micro powder screening technology, specifically a multi-stage ultrafine silicon micro powder grading and screening machine. Background Technology

[0002] Micronized silica powder, also known as quartz powder, is a quartz powder material made from natural quartz through processes such as sorting, crushing, washing, purification, drying, iron removal, grinding, and grading. As an important inorganic non-metallic material, ultrafine silica powder is widely used in electronic packaging, special ceramics, coatings, rubber, and many other fields. In the process of processing ultrafine silica powder, a screening machine is required for sieving.

[0003] Currently, most ultrafine silicon powder grading and screening machines on the market adopt a single screening structure. During the screening process, they cannot separate silicon powder particles in an orderly and precise manner based on particle size. This makes it difficult for particles of different sizes to be screened at specific levels, resulting in low grading accuracy and screening efficiency that cannot meet the strict particle size classification requirements of modern industry for ultrafine silicon powder. Furthermore, when silicon powder agglomerates during the screening process, it easily causes screen clogging, seriously affecting the smoothness of the screening process. At the same time, uneven distribution of materials on the screening plate reduces the contact opportunity between particles and screen holes, further reducing screening efficiency and accuracy, leading to insufficient screening, resource waste, and increased production costs. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage ultrafine silicon powder grading and screening machine to solve the problems mentioned in the background art, such as low screening efficiency, difficulty in meeting particle size requirements, and easy clogging, resulting in insufficient screening.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A multi-stage ultrafine silicon powder grading and screening machine includes a base frame, a groove is provided on the inner wall of the base frame, a pulley is slidably connected in the groove, a connecting frame is fixedly connected to the end of the pulley, multiple connecting frames are provided, a screening hopper is fixedly connected between the multiple connecting frames, a screening plate is installed on the bottom surface of the screening hopper, and a feeding hopper is connected to the end of the screening hopper.

[0007] The base frame is equipped with a screening assembly and a scraping assembly. An installation plate is fixed to the side wall of the base frame. The screening assembly includes a support rod fixedly connected to the bottom surface of the installation plate. A motor is fixedly connected to the bottom surface of the support rod. A drive shaft is fixedly connected to the output end of the motor. A turntable is fixed on the drive shaft. A fixing rod is fixed on the turntable. An annular plate is slidably installed on the outer ring of the fixing rod. An L-shaped plate is fixedly connected to the end side of the annular plate. The L-shaped plate is fixedly connected to the screening hopper.

[0008] Preferably, there are multiple screening buckets and screening plates, and the sieve holes of the screening plates are distributed in an arithmetic progression from upstream to downstream.

[0009] Preferably, a limiting plate is fixedly connected to the other side of the annular plate, a first limiting block is fixedly connected to the mounting plate, the limiting plate is slidably connected to the first limiting block, a second limiting block is fixedly connected to the base frame, and the L-shaped plate is slidably connected to the second limiting block.

[0010] Preferably, the scraping assembly includes a fixed frame fixedly connected to the base frame, a toothed plate fixedly connected to the fixed frame, a rotating shaft rotatably connected to the screening plate, a scraper fixedly sleeved on the rotating shaft, and a gear fixedly connected to the rotating shaft.

[0011] Preferably, the gear meshes with the toothed plate, the curvature of the scraper sidewall is adapted to the curved shape of the screening hopper, and the scraper slides in contact with the screening plate.

[0012] Preferably, the connection between the feeding hopper and the screening hopper is provided with multiple perforations, the perforations being larger than the aperture of the screening plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model adopts a combination structure of multi-layer screening bucket and screening plate, and the sieve hole diameter of the screening plate is distributed according to the arithmetic decreasing law to form a multi-level screening system. This design enables silicon micro powder to be accurately separated according to particle size when passing through each layer of screening components. Particles of different sizes are screened at the corresponding level. Compared with the traditional single screening method, it improves the classification accuracy and screening efficiency, and can meet the strict particle size classification requirements of ultrafine silicon micro powder.

[0015] 2. In the screening process of this utility model, the reciprocating motion of the screening bucket is driven by the meshing of gears and toothed plates, which drives the scraper to rotate. The scraper is in close contact with the screening plate and the side wall curvature is adapted, which can effectively break up the agglomerated silicon powder, prevent the screen holes from being blocked, and ensure a smooth screening process. At the same time, it makes the material evenly distributed on the screening plate, increases the contact opportunity between particles and screen holes, further improves screening efficiency and accuracy, and avoids the problem of insufficient screening caused by material agglomeration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of some components of the screening assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection and installation structure of the screening component and the scraping component of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection and installation structure of the scraping component of this utility model.

[0021] In the diagram: 1. Base frame; 2. Slide chute; 3. Pulley; 4. Connecting frame; 5. Screening hopper; 6. Screening plate; 7. Feed hopper; 8. Leakage hole; 9. Screening assembly; 91. Support rod; 92. Motor; 93. Drive shaft; 94. Turntable; 95. Fixing rod; 96. Annular plate; 97. Limiting plate; 98. Limiting block one; 99. L-shaped plate; 910. Limiting block two; 10. Scraping assembly; 101. Fixing frame; 102. Toothed plate; 103. Gear; 104. Rotating shaft; 105. Scraper; 11. Mounting plate. Detailed Implementation

[0022] 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.

[0023] Example 1: Please refer to Figures 1-5A multi-stage ultrafine silica powder grading and screening machine includes a base frame 1. A groove 2 is formed on the inner wall of the base frame 1, and a pulley 3 is slidably connected within the groove 2, providing a sliding track for the pulley 3. The inner wall of the groove 2 is polished to reduce friction during the sliding of the pulley 3, ensuring smooth movement of the screening bucket 5. The pulley 3 is connected to a connecting frame 4 via bearings. The bearings are deep groove ball bearings, which can effectively withstand the radial load generated by the screening bucket 5 during operation. This is existing technology and will not be described in detail. Multiple connecting frames 4 are fixedly connected to the ends of the pulley 3. Screening buckets 5 are fixedly connected between these multiple connecting frames 4 in an array, collectively fixing the screening bucket 5 and ensuring its stability and structural strength during movement. Screening hopper 5 has a screening plate 6 installed on its bottom surface, and a feeding hopper 7 is connected to the end of screening hopper 5. Multiple perforations 8 are provided at the connection between feeding hopper 7 and screening hopper 5. The perforations 8 are larger than the aperture of screening plate 6. Screening hopper 5 and screening plate 6 have multiple perforations, and the aperture diameter of screening plate 6 is distributed in a decreasing arithmetic pattern from upstream to downstream. Screening hopper 5 is an inverted funnel-shaped structure made of stainless steel, possessing good wear resistance and corrosion resistance. The screening plate 6 installed at the bottom of each screening hopper 5 uses laser cutting technology to process the perforations, ensuring the accuracy of the perforation size. Feeding hopper 7 is connected to screening hopper 5 by welding, and the perforations 8 at the connection point precisely correspond to the aperture diameter of screening plate 6, allowing the material screened by screening plate 6 to smoothly pass through the perforations 8 into feeding hopper 7. Multiple sets of screening hoppers 5 and screening plates 6 are arranged sequentially along the material flow direction, forming a multi-stage screening system. There is a certain height difference between adjacent screening hoppers 5, facilitating the natural flow of material by gravity.

[0024] A screening assembly 9 is installed on the base frame 1. An installation plate 11 is fixed to the side wall of the base frame 1. The screening assembly 9 includes a support rod 91 fixedly connected to the bottom surface of the installation plate 11. A motor 92 is fixedly connected to the bottom surface of the support rod 91. A transmission shaft 93 is fixedly connected to the output end of the motor 92. A turntable 94 is fixedly fixed on the transmission shaft 93. A fixing rod 95 is fixedly fixed on the turntable 94. An annular plate 96 is slidably installed on the outer ring of the fixing rod 95. An L-shaped plate 99 is fixedly connected to the end of the annular plate 96. The L-shaped plate 99 is fixedly connected to the screening hopper 5. A limit plate 97 is fixedly connected to the other side of the annular plate 96. A first limit block 98 is fixedly connected to the installation plate 11. The limit plate 97 is slidably connected to the first limit block 98. A second limit block 910 is fixedly connected to the base frame 1. The L-shaped plate 99 is slidably connected to the second limit block 910. One end of the L-shaped plate 99 is fixedly connected to the annular plate 96, and the other end is welded to the screening hopper 5, transmitting the power of the motor 92 to the screening hopper 5, which then reciprocates. The sliding engagement between the limiting plate 97 and the first limiting block 98, and between the L-shaped plate 99 and the second limiting block 910, precisely limits the movement trajectory of the screening hopper 5, preventing it from deviating during movement.

[0025] It should be noted that the equipment innovatively adopts a combination structure of multi-layer screening hopper 5 and screening plate 6. The pore diameter of each screening plate 6 strictly follows the arithmetic progression law, and the pore diameter of the leakage hole 8 at the connection between the feeding hopper 7 and the screening hopper 5 also corresponds accordingly, together constructing a precise multi-level screening system. In actual operation, this design allows silicon micro powder to be accurately separated according to particle size when passing through each layer of screening components 9. Particles of different sizes are screened at the corresponding level, greatly improving the grading accuracy and screening efficiency. Due to the limitation of array arrangement space when drawing the drawings, the differences in pore diameter of each screening plate 6 and leakage hole 8 could not be marked in detail. However, in actual production and manufacturing, the pore diameter of each component is strictly set in an orderly manner from large to small according to the design requirements to ensure the effective realization of the screening function.

[0026] Specifically, before the equipment is started, all components are in their initial positions. The screening hopper 5 remains stationary under the support of the pulley 3 and the chute 2. The multi-segment ultrafine silicon powder to be screened is fed into the top of the upstream screening hopper 5, and the material first accumulates on the screening plate 6 of the screening hopper 5.

[0027] Next, the motor 92 is started, and the motor 92 drives the turntable 94 to rotate through the transmission shaft 93. The fixed rod 95 on the turntable 94 rotates accordingly, causing the fixed rod 95 to shift around the circumference as the turntable 94 rotates. Since the annular plate 96 is slidably sleeved with the fixed rod 95, the rotational motion of the fixed rod 95 is converted into the horizontal motion of the annular plate 96 during the rotation of the turntable 94, causing the annular plate 96 to slide horizontally back and forth. Since the L-shaped plate 99 and the limiting plate 97 are fixedly connected to the annular plate 96, the L-shaped plate 99 is slidably connected to the second limiting block 910, the limiting plate 97 is slidably connected to the first limiting block 98, and the L-shaped plate 99 is fixedly connected to the screening hopper 5, during the horizontal movement of the annular plate 96, the L-shaped plate 99 will slide horizontally within the second limiting block 910, and the limiting plate 97 will slide horizontally within the first limiting block 98. At the same time, the screening hopper 5 fixed to the end of the L-shaped plate 99 will also move in a reciprocating linear motion along the direction of the slide groove 2.

[0028] Because the apertures on the screening plate 6 are arranged in descending order of size, and the screening hopper 5 and screening plate 6 are arranged in multiple layers, the material on the screening plate 6 is constantly shaken during the movement of the screening hopper 5. The silicon micropowder particles move under the action of inertia and gravity. Particles with a diameter larger than the sieve apertures remain on the screening plate 6. As the screening hopper 5 continues to reciprocate, the ultrafine silicon micropowder with a diameter larger than the apertures of the screening plate 6 is vibrated by the screening hopper 5 and leaks through the leakage holes 8 into the feed hopper 7, and then falls into the collection container placed by the staff. The ultrafine silicon micropowder with a smaller diameter that continues to fall falls to the second layer. During the movement of the screening hopper 5, the material on the screening plate 6 is constantly shaken. The silicon micro powder particles move under the action of inertia and gravity. Particles with a diameter larger than the sieve holes remain on the screening plate 6. As the screening hopper 5 continues to move back and forth, the ultrafine silicon micro powder with a diameter larger than the sieve plate 6 holes will be vibrated by the screening hopper 5 and fall through the leakage hole 8 into the feed hopper 7. Then, it falls into the collection container placed by the staff. As the material passes through the multi-layer screening components 9 in sequence, silicon micro powder of different particle sizes is accurately classified in each layer of the screening hopper 5, completing the multi-stage screening process and significantly improving screening efficiency and classification accuracy.

[0029] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1-2 , Figures 4-5 A scraping assembly 10 is installed on the base frame 1. The scraping assembly 10 includes a fixed frame 101 fixedly connected to the base frame 1. A toothed plate 102 is fixedly connected to the fixed frame 101. A rotating shaft 104 is rotatably connected to the screening plate 6. A scraper 105 is fixedly sleeved on the rotating shaft 104. A gear 103 is fixedly connected to the rotating shaft 104. The gear 103 and the toothed plate 102 mesh with each other. The side wall curvature of the scraper 105 is adapted to the curved shape of the screening hopper 5. The scraper 105 slides in contact with the screening plate 6.

[0030] Specifically, during the operation of the screening machine, the screening bucket 5 reciprocates linearly along the sliding groove 2 on the inner wall of the base frame 1. This movement simultaneously drives the rotating shaft 104, which is rotatably connected to the screening plate 6, and related scraping components 10 to move. Since the fixed frame 101 is fixed on the base frame 1, the toothed plate 102 connected to it is in a stationary state, while the gear 103, which is fixedly connected to the rotating shaft 104, and the toothed plate 102 mesh with each other.

[0031] Therefore, when the screening bucket 5 drives the rotating shaft 104 to move, the gear 103 on the rotating shaft 104 will contact the toothed plate 102. According to the meshing transmission principle of the gear 103 and the toothed plate 102, the rolling of the gear 103 is converted into the rotation of the rotating shaft 104. During the rotation of the rotating shaft 104, the scraper 105 fixedly sleeved on it will rotate accordingly. The arc of the side wall of the scraper 105 is adapted to the curved shape of the screening bucket 5, and the scraper 105 slides in close contact with the screening plate 6, so that the scraper 105 can closely fit the surface of the screening plate 6.

[0032] During the rotation of scraper 105, it scrapes and disperses the silicon powder accumulated on the screening plate 6. On the one hand, it breaks up the agglomerated silicon powder, preventing the screen holes from being blocked due to material agglomeration and affecting the screening efficiency. On the other hand, it makes the silicon powder particles more evenly distributed on the screening plate 6. During the shaking of the screening hopper 5, the particles can make more full contact with the screen holes, and particles with a particle size smaller than the screen holes can pass through the screen holes smoothly and fall into the feed hopper 7 below, thereby improving the efficiency and accuracy of silicon powder screening and ensuring the efficient operation of the multi-stage screening process.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] 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 multi-stage ultrafine silica powder grading and screening machine, comprising a base frame (1), characterized in that: The inner wall of the base frame (1) is provided with a sliding groove (2), and a pulley (3) is slidably connected in the sliding groove (2). A connecting frame (4) is fixedly connected to the end of the pulley (3). Multiple connecting frames (4) are provided, and a screening hopper (5) is fixedly connected between the multiple connecting frames (4). A screening plate (6) is installed on the bottom surface of the screening hopper (5), and a feeding hopper (7) is connected to the end of the screening hopper (5). The base frame (1) is equipped with a screening component (9) and a scraping component (10). The base frame (1) is fixed with a mounting plate (11). The screening component (9) includes a support rod (91) fixedly connected to the bottom surface of the mounting plate (11). The bottom surface of the support rod (91) is fixedly connected to a motor (92). The output end of the motor (92) is fixedly connected to a transmission shaft (93). A turntable (94) is fixed on the transmission shaft (93). A fixing rod (95) is fixed on the turntable (94). An annular plate (96) is slidably installed on the outer ring of the fixing rod (95). An L-shaped plate (99) is fixedly connected to the end side of the annular plate (96). The L-shaped plate (99) is fixedly connected to the screening hopper (5).

2. The multi-stage ultrafine silica powder grading and screening machine according to claim 1, characterized in that: The screening bucket (5) and screening plate (6) are provided in multiple ways, and the sieve hole diameter of the screening plate (6) is distributed in an arithmetic decreasing pattern from upstream to downstream.

3. The multi-stage ultrafine silica powder grading and screening machine according to claim 2, characterized in that: A limiting plate (97) is fixedly connected to the other side of the annular plate (96), a limiting block one (98) is fixedly connected to the mounting plate (11), the limiting plate (97) is slidably connected to the limiting block one (98), a limiting block two (910) is fixedly connected to the base frame (1), and the L-shaped plate (99) is slidably connected to the limiting block two (910).

4. The multi-stage ultrafine silica powder grading and screening machine according to claim 1, characterized in that: The scraping assembly (10) includes a fixed frame (101) fixedly connected to the base frame (1), a toothed plate (102) fixedly connected to the fixed frame (101), a rotating shaft (104) rotatably connected to the screening plate (6), a scraper (105) fixedly sleeved on the rotating shaft (104), and a gear (103) fixedly connected to the rotating shaft (104).

5. A multi-stage ultrafine silica powder grading and screening machine according to claim 4, characterized in that: The gear (103) meshes with the toothed plate (102), the side wall curvature of the scraper (105) is adapted to the curved shape of the screening bucket (5), and the scraper (105) slides in contact with the screening plate (6).

6. The multi-stage ultrafine silica powder grading and screening machine according to claim 1, characterized in that: The feeding hopper (7) and the screening hopper (5) are provided with a plurality of holes (8), and the holes (8) are larger than the aperture of the screening plate (6).

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