Industrial silicon multi-stage screening mechanism

Abstract

The utility model discloses a multistage screening mechanism for industrial silicon, which relates to the field of screening mechanisms and comprises a screening bin and an arc-shaped screening plate, a plurality of groups of polarization motors are fixedly connected to the side edge of the screening bin, springs are connected below the polarization motors, and the bottoms of the springs are fixedly connected to a base. A plurality of layers of keels used for installing and fixing arc-shaped sieve plates are sequentially arranged in the screening bin from top to bottom, sliding rails are further installed on the keels, sliding blocks are connected in the sliding rails in a clamped mode and connected with oil cylinder telescopic rods, rotating motors are arranged on the sliding blocks, and the keels, the sliding rails, the sliding blocks and the rotating motors on the same layer correspond to one another. The arc-shaped sieve plate is adopted, material accumulation can be reduced through the generated turbulence effect, materials can pass through sieve holes more easily, the arc-shaped sieve plate and the keel are connected in a clamping mode, and disassembly, maintenance and replacement are easy. The scraper blade is arranged on the surface of the arc-shaped sieve plate, so that material particles clamped in the sieve pores are removed in time, the sieve pores can be kept unobstructed, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of screening mechanisms, specifically an industrial silicon multi-stage screening mechanism. Background Technology

[0002] Industrial silicon, also known as metallic silicon, is produced by drying and smelting silica sludge. Specifically, wet silica sludge is dried in a special oven and then transferred to a medium-frequency furnace for smelting and impurity removal. Silica sludge is a low-temperature antioxidant, typically soft, with a fine texture, light weight, high porosity, and strong water absorption. Dried silica exposed to air easily generates dust, while industrial silicon produced by medium-frequency furnace smelting is hard and brittle. Given the different characteristics of silicon materials at different stages of industrial silicon production, many problems remain to be solved in the drying, transfer, smelting, and crushing processes.

[0003] During the material crushing stage, the crushed material comes in various sizes, and separating it into different particle sizes for easier subsequent processing places high demands on the screening equipment. Referring to Chinese invention patent publication number "CN 103331255 A," a vibrating screen uses a vibrator and screen plate to separate materials into coarse and fine particles. However, in existing technology, ordinary flat screens suffer from low screening efficiency due to material accumulation or uneven distribution, especially for fine particles. Furthermore, irregularly shaped silica lumps after crushing may become stuck in the screen holes, causing blockages and requiring frequent shutdowns for cleaning, thus affecting production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an industrial silicon multi-stage screening mechanism to solve the problems mentioned above.

[0005] An industrial silicon multi-stage screening mechanism includes a screening chamber and an arc-shaped screen plate. Multiple sets of polarization motors are fixedly connected to the side of the screening chamber. Springs are connected below the polarization motors, and the bottoms of the springs are fixedly connected to the base. After the polarization motors are started, they drive the entire screening chamber to vibrate. Multiple layers of keels for installing and fixing the arc-shaped screen plate are arranged from top to bottom inside the screening chamber. Slide rails are also installed on the keels. Slider blocks are locked in the slide rails. The sliders are connected to the extension rods of the hydraulic cylinders. Rotary motors are installed on the sliders. Two keels, slide rails, sliders, and rotary motors are arranged in the same layer, corresponding to each other.

[0006] Preferably, the keel is inclined downwards, and the arc-shaped screen plate is snapped onto the keel by the protrusions at both ends. The arc-shaped screen plate can be removed for repair or replacement as needed. The screen hole diameter on the surface of the arc-shaped screen plate decreases gradually from the top layer to the bottom layer. An inclined guide plate is provided below the bottom arc-shaped screen plate. A strip opening is provided at the material outlet of the guide plate, and bag baffles are provided at both ends of the strip opening.

[0007] Preferably, the discharge port of the arc-shaped screen plate is equipped with a feeding plate, which points in different directions to facilitate the collection of materials of different particle sizes.

[0008] Preferably, a scraper is fixedly connected between a group of rotating motors corresponding to the same layer. The bottom curvature of the scraper is consistent with the curvature of the arc-shaped screen plate. The rotating motor is equipped with a limit plate to limit the rotation range to 0° to 90°.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. In this utility model, by setting an arc-shaped screen plate with protrusions on both sides, it is easy to disassemble and install. At the same time, during the vibration process of the arc-shaped screen plate, when the material flows on the arc surface, due to the combined action of centrifugal force and gravity, fine particles are more likely to pass through the screen holes, while coarse particles are quickly discharged along the arc surface. The turbulence effect generated by the arc structure can reduce material accumulation.

[0011] 2. In this utility model, a scraper is set on the surface of the arc-shaped screen plate. The scraper is rotated by a rotating motor, and the sliding block is reciprocated linearly on the guide rail by a telescopic hydraulic cylinder. That is, the rotating motor is controlled to reciprocate linearly, which in turn controls the scraper to reciprocate linearly. When scraping off the material accumulated on the surface of the arc-shaped screen plate, the rotating motor is set to 0°, at which time the scraper is perpendicular to the arc-shaped plate surface. After the scraper scrapes off the material, it resets. When resetting, the rotating motor is set to 90°. It can be set to timed scraping or manually started to scrape the surface of the screen plate, so as to remove the material particles stuck in the screen holes in time, keep the screen holes unobstructed, reduce the decline in screening efficiency caused by blockage, and improve production efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the arc-shaped sieve plate in this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the rotating motor in this utility model at 0°.

[0015] Figure 4 This is a schematic diagram of the rotating motor at 90° in this utility model;

[0016] Figure 5 This is a schematic cross-sectional view of the screening chamber in this utility model;

[0017] Figure 6 This is a schematic diagram of the installation position of the polarization motor in this utility model.

[0018] In the diagram: 1. Screening bin; 11. Arc-shaped screen plate; 111. Protrusion; 112. Loading plate; 12. Keel; 13. Slide rail; 14. Slider; 15. Rotary motor; 16. Scraper; 17. Guide plate; 171. Strip opening; 172. Bag baffle; 2. Polarizing motor; 3. Spring; 4. Base. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-6 In this embodiment of the present invention, an industrial silicon multi-stage screening mechanism includes a screening chamber 1 and an arc-shaped screen plate 11. Multiple sets of polarization motors 2 are fixedly connected to the side of the screening chamber 11. Springs 3 are connected below the polarization motors 2, and the bottoms of the springs 3 are fixedly connected to a base 4. When the polarization motors 2 are started, they drive the entire screening chamber 1 to vibrate. Multiple layers of ribs 12 for mounting and fixing the arc-shaped screen plate 11 are arranged sequentially from top to bottom inside the screening chamber 1. (See reference...) Figure 1 In this embodiment, a three-layer keel 12 structure is adopted. A slide rail 13 is also installed on the keel 12. A slider 14 is snapped into the slide rail 13. The slider 14 is connected to the hydraulic cylinder telescopic rod. A rotating motor 15 is provided on the slider 14. Two keels 12, two slide rails 13, two sliders 14 and two rotating motors 15 are provided on the same layer, corresponding to each other.

[0021] The keel 12 is inclined downwards, and the arc-shaped screen plate 11 is snapped onto the keel 12 by the protrusions 111 at both ends. The arc-shaped screen plate 11 can be removed for repair or replacement as needed. The screen hole diameter on the surface of the arc-shaped screen plate 11 decreases gradually from the top layer to the bottom layer. The bottom arc-shaped screen plate 11 is provided with an inclined guide plate 17. The guide plate has a strip opening 171 at the material outlet, and bag baffles 172 are provided at both ends of the strip opening.

[0022] The arc-shaped screen plate 11 is equipped with a feeding plate 112 at the feeding port. The feeding plate 112 points in different directions to facilitate the collection of materials with different particle sizes. During production, the materials screened in the top and middle layers generally meet the standards. The material collected in the first layer has a particle size that is too large and needs to be crushed again. The material collected in the bottom layer has a particle size that is too small and needs to be collected and returned to the medium frequency furnace to be remelted into metallic silicon blocks and then crushed.

[0023] In this system, a scraper 16 is fixedly connected between a set of rotating motors 15 on the same layer. The bottom curvature of the scraper 16 is consistent with the curvature of the arc-shaped screen plate 11. The rotating motor 15 is equipped with a limit plate to limit the rotation range from 0° to 90°. Here, the rotating motor 15 controls the rotation of the scraper 16, and the telescopic cylinder controls the slide block 14 to perform linear reciprocating motion on the guide rail. That is, the rotating motor 15 is controlled to perform linear reciprocating motion, which in turn controls the scraper 16 to perform linear reciprocating motion. When scraping off the material accumulated on the surface of the arc-shaped screen plate 11, the rotating motor 15 is set at 0°. At this time, the scraper 16 is perpendicular to the arc-shaped plate surface. After the scraper 16 scrapes off the material, it is reset. When resetting, the rotating motor 15 is set at 90°. In practice, the control of the telescopic cylinder and the rotating motor 15 is set to timed start, and a manual start device is also provided.

[0024] The working principle of this utility model is as follows: After being crushed by the crusher, the material enters the screening mechanism. The curved surface of the arc-shaped screen plate 11 allows the material to slide naturally along the screen surface under the action of gravity, forming a more uniform material distribution. At the same time, the curvature of the screen surface can prolong the material residence time and increase the chance of passing through the screen. The arc structure disperses the impact force of the material and reduces local wear. The rotating motor 15 is set on the slide rail 13 through the slider 14 and is driven by the oil cylinder to perform linear reciprocating motion. The rotating motor 15 can drive the scraper 16 to rotate. The limiting plate on the rotating motor 15 can limit the rotation range to 0-90°. When scraping, the rotating motor 15 is set at 0°, that is, perpendicular to the arc-shaped plate surface. With the linear movement of the slider 14, the scraper 16 can scrape away the material remaining on the arc-shaped screen plate 11. When resetting, the rotating motor 15 is set at 90°, that is, parallel to the arc-shaped screen plate 11, and returns to the feed port side. During the resetting process, the scraper 16 does not contact the plate surface and will not take away the material on the plate surface. Scraping can be performed again at set intervals or manually. Multi-layer screening can obtain materials that meet the standard particle size. Materials that do not meet the standard are collected and returned to the crusher for further crushing or returned to the medium-frequency furnace for smelting.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An industrial silicon multi-stage screening mechanism, comprising a screening bin (1) and an arc-shaped screen plate (11), characterized in that: Multiple polarization motors (2) are fixedly connected to the side of the screening chamber (1). A spring (3) is connected below the polarization motor (2). The bottom of the spring (3) is fixedly connected to the base (4). Multiple layers of keels (12) for installing and fixing the arc-shaped screen plate (11) are arranged from top to bottom in the screening chamber (1). A slide rail (13) is also installed on the keel (12). A slider (14) is snapped into the slide rail (13). The slider (14) is connected to the oil cylinder telescopic rod. A rotating motor (15) is provided on the slider (14). Two keels (12), slide rails (13), sliders (14) and rotating motors (15) are provided on the same layer, corresponding to each other.

2. The industrial silicon multi-stage screening mechanism according to claim 1, characterized in that: The keel (12) is provided with a downward tilt angle. The arc-shaped screen plate (11) is engaged with the keel (12) by the protrusions (111) at both ends. The screen hole diameter of the arc-shaped screen plate (11) decreases from the top layer to the bottom layer. The bottom arc-shaped screen plate (11) is provided with an inclined guide plate (17). The guide plate (17) has a strip opening (171) at the discharge port. The two ends of the strip opening (171) are provided with bag baffles (172).

3. The industrial silicon multi-stage screening mechanism according to claim 1, characterized in that: The arc-shaped screen plate (11) is provided with a loading plate (112) at the discharge port, and the loading plate (112) points in different directions.

4. The industrial silicon multi-stage screening mechanism according to claim 1, characterized in that: A scraper (16) is fixedly connected between a group of rotating motors (15) corresponding to the same layer. The bottom arc of the scraper (16) is consistent with the arc of the arc-shaped screen plate (11). The rotating motor (15) is provided with a limit plate to limit the rotation range to 0° to 90°.

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