A polysilicon crushing device

Abstract

This invention provides a polycrystalline silicon material crushing device to solve the technical problems of low efficiency, high cost, and high pollution risk associated with the existing method of manual transfer and secondary crushing of crushed silicon material. The device includes a crushing mechanism, a feeding mechanism, a screening mechanism, a first guide hopper, and a conveying mechanism. The crushing mechanism has a first crushing chamber and a second crushing chamber. The upper end of the first guide hopper is connected to the outlet of the first crushing chamber, and the lower end is connected to the feed hopper of the screening mechanism. The feed end of the conveying mechanism is connected to the first outlet of the screening mechanism to transport large pieces discharged from the first outlet to the second crushing chamber. By coordinating the first crushing chamber, the second crushing chamber, and the screening mechanism, the large pieces screened out are transported again to the second crushing chamber for secondary crushing via the conveying mechanism. The entire process eliminates the need for manual transfer, reducing the labor intensity of workers and the risk of cross-contamination.

Description

Technical Field

[0001] This utility model relates to the field of polysilicon production technology, and in particular to a polysilicon crushing device. Background Technology

[0002] Jaw crushers are widely used in the crushing and processing of polysilicon. Due to the gap between the jaw crusher and the material, the resulting polysilicon material can be categorized into three types: lumps, small pieces, and crushed pieces. Currently, large pieces of polysilicon usually need to be manually transported to the feed inlet for further crushing. Because there are many crushing lines, manual transport is slow, labor-intensive, and costly. Moreover, there is a risk of cross-contamination during manual transport. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide a polycrystalline silicon material crushing device, which solves the technical problems of low efficiency, high cost and high pollution risk of the existing method of secondary crushing of silicon material by manual transfer after crushing.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A polysilicon crushing device includes: a crushing mechanism having a first crushing chamber and a second crushing chamber; a feeding mechanism disposed above the crushing mechanism for feeding silicon material into the first crushing chamber; a screening mechanism disposed below the crushing mechanism for receiving the crushed silicon material and classifying it; a first guide hopper having its upper end connected to the outlet end of the first crushing chamber and its lower end connected to the feed hopper of the screening mechanism; and a conveying mechanism having its feed end connected to the first outlet of the screening mechanism for conveying the large material discharged from the first outlet to the second crushing chamber.

[0006] This invention can replace manual labor. The crushing mechanism uses the first crushing chamber as the main crushing chamber and the second crushing chamber as the auxiliary crushing chamber to achieve a dual-chamber linkage structure. At the same time, it works with a screening mechanism for automatic screening. The large pieces screened out are then transported to the second crushing chamber for secondary crushing via a conveying mechanism. The entire process does not require manual transfer, effectively reducing the labor intensity of workers, saving costs, and avoiding cross-contamination caused by transfer. Moreover, through cyclic crushing and screening, large materials can be prevented from mixing into the next stage, which is conducive to improving the sorting effect and increasing the processing efficiency of polycrystalline silicon.

[0007] Optionally, the crushing mechanism includes: a first movable jaw plate and a second movable jaw plate that are driven and connected to a power structure; and a first fixed jaw plate and a second fixed jaw plate disposed outside the two movable jaw plates; the first fixed jaw plate and the first movable jaw plate form a first crushing chamber, and the second movable jaw plate and the second fixed jaw plate form a second crushing chamber.

[0008] Optionally, the screening mechanism includes: a screening box, located below the crushing mechanism, with a first feed hopper on one side of the top, and two screen plates of different specifications arranged inside from top to bottom, and a first outlet, a second outlet, and a third outlet for discharging different grades of silicon material at the discharge end; a vibration mechanism, located at the bottom of the screening box; and a dust removal mechanism, connected to the first dust removal port on the screening box.

[0009] Optionally, the first feed hopper includes a feed section and a discharge section whose size gradually decreases, connected in sequence, with the discharge section extending into the first feed hopper.

[0010] Optionally, a shell is also provided outside the first feed hopper, and the first guide hopper is installed on the shell. The shell is provided with a second dust removal port that communicates with the dust removal mechanism. By setting up the guide hopper and the shell, the diffusion of silicon powder can be reduced when the crushed silicon material enters the screening box.

[0011] Optionally, the screening box is also provided with a second feed bin, which is located below the second crushing chamber and is connected to the second crushing chamber through a second guide bin.

[0012] Optionally, the second feed hopper includes a feed section and a discharge section that are connected in sequence and gradually decrease in size, with the discharge section of the second feed hopper extending into the second feed hopper.

[0013] Optionally, the first and second feed bins are covered with a housing, and the first and second guide bins are both installed on the housing, with the discharge section of the guide bins extending into the corresponding feed bins.

[0014] Optionally, a conveying device is provided below the outlet of the second crushing chamber.

[0015] Optionally, the conveying mechanism includes: a first conveyor belt with its feed end connected to the first outlet; a lifting belt with its feed end connected to the discharge end of the first conveyor belt; and a second conveyor belt with its feed end connected to the output end of the lifting belt and its output end connected to the inlet of the second crushing chamber.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention replaces manual labor. The crushing mechanism uses a first crushing chamber as the primary crushing chamber and a second crushing chamber as the secondary crushing chamber, achieving a dual-chamber linkage structure. Simultaneously, it works with a screening mechanism for automatic screening. Larger pieces are then conveyed to the second crushing chamber for secondary crushing. The entire process eliminates the need for manual transfer, effectively reducing labor intensity, saving costs, and minimizing the risk of cross-contamination. Furthermore, the cyclic crushing and screening prevents large pieces from mixing into the next stage, improving sorting efficiency and increasing the processing efficiency of polycrystalline silicon. In addition, the design of the guide hopper and shell reduces silicon powder diffusion when the crushed silicon material enters the screening box. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of one embodiment of the polysilicon crushing device of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of Example 5.

[0021] Figure 3 This is a schematic diagram of one embodiment of the conveying mechanism in this utility model.

[0022] Figure label:

[0023] 1. Crushing mechanism; 10. Frame; 11. First crushing chamber; 12. Second crushing chamber; 13. First moving jaw plate; 14. Second moving jaw plate; 15. First fixed jaw plate; 16. Second fixed jaw plate;

[0024] 2. Feeding mechanism;

[0025] 3. Screening mechanism; 31. Screening box; 311. First feed bin; 312. First outlet; 313. Second outlet; 314. Third outlet; 315. First dust removal port; 316. Second feed bin; 32. Vibration mechanism;

[0026] 4. First feed hopper; 41. Feeding section; 42. Discharge section;

[0027] 5. Conveying mechanism; 51. First conveyor belt; 52. Lifting belt; 53. Second conveyor belt;

[0028] 6. Housing; 61. Second dust collection port;

[0029] 7. Conveying device; 8. Second guide hopper. Detailed Implementation

[0030] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of this utility model application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0031] In the description of the embodiments of this utility model application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "end", "side" etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, are only for the convenience of describing the embodiments of this utility model application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In the embodiments of this utility model application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model application according to the specific circumstances.

[0034] In the embodiments of this utility model application, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of this utility model application. To simplify the disclosure of the embodiments of this utility model application, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of this utility model application. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of this utility model application; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0036] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0037] Example 1

[0038] This utility model application provides a polysilicon crushing device, including: a crushing mechanism 1, a feeding mechanism 2, a screening mechanism 3, a first guide hopper 4, and a conveying mechanism 5.

[0039] The crushing mechanism 1 has a first crushing chamber 11 and a second crushing chamber 12. A feeding mechanism 2 is located above the crushing mechanism 1 and is used to feed the polycrystalline silicon material to be crushed into the first crushing chamber 11. A screening mechanism 3 is located below the crushing mechanism 1 and is used to receive the crushed silicon material and classify it. The upper inlet of the first feed hopper 4 is connected to the outlet of the first crushing chamber 11, and the lower outlet is connected to the feed hopper of the screening mechanism 3. The feed end of the conveying mechanism 5 is connected to the first outlet 312 of the screening mechanism 3, and is used to convey the large material discharged from the first outlet 312 to the second crushing chamber 12 for secondary crushing.

[0040] In operation, polycrystalline silicon material first enters the first crushing chamber 11 through the feeding mechanism 2 for crushing, and then enters the screening mechanism 3 through the first guide bin 4. The screening mechanism 3 classifies and screens the material according to particle size. Larger particles that do not pass through the screen of the screening mechanism 3 are discharged through the first outlet 312 to the conveying mechanism 5, which then conveys them to the second crushing chamber 12 for further crushing. The silicon material after secondary crushing can be discharged to the next process (such as screening, AI intelligent sorting, etc.) through the conveying device or discharged to the screening mechanism 3 for screening. The large particles that pass through screening are conveyed to the second crushing chamber 12 through the conveying mechanism 5 for secondary crushing. On the one hand, this reduces the manual transfer process and saves costs; on the other hand, it prevents large particles from being mixed into the next process, improving the processing quality of polycrystalline silicon material. For example, it prevents large particles from being mixed into the next sorting process, which can help improve the sorting effect and efficiency; or it prevents large particles from being directly mixed into the packaging process, improving the packaging quality.

[0041] Example 2

[0042] Based on Embodiment 1, in this embodiment, the crushing mechanism 1 includes a frame 10, a first movable jaw plate 13, a second movable jaw plate 14, a first fixed jaw plate 15, a second fixed jaw plate 16, and a power structure. The frame 10 has a first fixed jaw plate 15 on the left and a second fixed jaw plate 16 on the right. The first movable jaw plate 13 and the second movable jaw plate 14 are connected in the middle of the frame 10 via the power structure, thus forming a first crushing chamber 11 with the first fixed jaw plate 15 and the first movable jaw plate 13, and a second crushing chamber 12 with the second movable jaw plate 14 and the second fixed jaw plate 16. The power structure is drivenly connected to the first movable jaw plate 13 and the second movable jaw plate 14. Under the action of the power structure, the movable jaw plates cooperate with the fixed jaw plates to crush the silicon material. The power structure adopts existing technology. For example, the power structure includes a power wheel located in the middle of the frame 10, a rotating shaft located on the power wheel, two transmission rods connected between the rotating shaft and the two movable jaw plates, and a fixed plate located below the power wheel and connected between the two movable jaw plates. Of course, the power structure can also adopt other settings. The power structure is a relatively mature existing technology in the double-chamber jaw crusher, and its implementation process and working principle will not be described in detail here.

[0043] Optionally, the frame 10 has a trapezoidal structure that is wider at the top and narrower at the bottom.

[0044] Optionally, both the first crushing chamber 11 and the second crushing chamber 12 are arranged to gradually decrease in size from top to bottom.

[0045] Optionally, the feeding mechanism 2 may be a belt conveyor.

[0046] Example 3

[0047] Based on Embodiment 1 or Embodiment 2, in this embodiment, the screening mechanism 3 includes: a screening box 31, a screen plate, a vibration mechanism 32, and a dust removal mechanism.

[0048] The screening box 31 is located below the crushing mechanism 1. Inside it, there are two screen plates of different specifications arranged from top to bottom. The feeding end of the screening box 31 is provided with a first feeding bin 311, and the discharging end is provided with a first outlet 312, a second outlet 313 and a third outlet 314. The first outlet 312 is used to discharge large materials, the second outlet 313 is used to discharge small pieces of material, and the third outlet 314 is used to discharge crushed materials.

[0049] A vibration mechanism 32 is installed below the screening box 31 to vibrate the screening box 31. Under the action of vibration, the silicon material in the screening box 31 is screened by the screen plates: large pieces pass through the upper, larger screen plates and are discharged from the first outlet 312; small pieces pass through the middle screen plates and are discharged from the second outlet 313; and broken pieces pass through the bottom of the screening box and are discharged from the third outlet 314. The silicon material discharged from the second outlet 313 and the third outlet can be transported to a silo for collection and further processing.

[0050] The top of the screening box 31 is provided with multiple first dust removal ports 315. The input end of the dust removal mechanism is connected to the first dust removal ports 315 through a pipeline. The dust removal mechanism is not shown in the figure and is existing technology. It is mainly used to collect dust inside the screening box 31.

[0051] Optionally, dust collection ports connected to the dust collection mechanism can also be installed on the three outlets.

[0052] Optionally, the sieve plate is not shown in the diagram. When using it, you can select the existing sieve of the corresponding specifications as needed. The sieve plate can be set at an angle.

[0053] In one embodiment, the first feed bin 4 includes a feed section 41 and a discharge section 42 that are connected in sequence and gradually decrease in size, with the discharge section 42 extending into the first feed bin 311.

[0054] In one embodiment, a housing 6 is also provided on the outside of the first feed hopper 311, a first guide hopper 4 is installed on the housing 6, and the discharge section 42 extends into the first feed hopper 311. The housing 6 is provided with a second dust removal port 61 that communicates with the dust removal mechanism. By setting up the first guide hopper 4 and the housing 6, when the crushed silicon material enters the screening box, the diffusion of silicon powder can be reduced.

[0055] Optionally, the lower end of the first crushing chamber 11 may extend into the feeding section 41 of the first feed hopper 4.

[0056] Example 4

[0057] Based on Example 1, 2 or 3, refer to Appendix Figure 1As shown, in this embodiment, a conveying device 7 is provided below the discharge end of the second crushing chamber 12. The discharged large material is conveyed to the second crushing chamber 12 by the conveying mechanism 5 for further crushing, and then conveyed to the next process by the conveying device 7, such as conveying to another screening mechanism for screening or to an AI intelligent sorting device for sorting. Optionally, the conveying device 7 is a conveyor belt.

[0058] Example 5

[0059] Based on Example 1, 2 or 3, refer to Appendix Figure 2 As shown, in this embodiment, the screening box 31 is also provided with a second feed bin 316. The second feed bin 316 is located below the second crushing chamber 12, and the second crushing chamber 12 and the second feed bin 316 are connected through the second guide bin 8.

[0060] The second feed bin 8 has the same structure as the first feed bin 4, that is, the second feed bin 8 also includes a feed section and a discharge section whose size gradually decreases, connected in sequence, and the discharge section of the second feed bin 8 extends into the second feed bin 316.

[0061] Optionally, in this embodiment, the housing 6 is covered on the first feed bin 311 and the second feed bin 316, the first guide bin 4 and the second guide bin 8 are both installed on the housing 6, and the discharge section extends into the corresponding feed bin.

[0062] Optionally, the lower end of the second crushing chamber 12 may extend into the second feed hopper 8.

[0063] In use, polycrystalline silicon material enters the first crushing chamber 11 through the feeding mechanism 2 for crushing, and then enters the screening mechanism 3 through the first guide bin 4. The screening mechanism 3 classifies and screens the material according to particle size. Larger particles that do not pass through the screen of the screening mechanism 3 are discharged through the first outlet 312 to the conveying mechanism 5, which then transports them to the second crushing chamber 12 for further crushing. After being crushed again, they enter the screening mechanism 3 again through the second guide bin 8 for screening. Qualified small pieces are discharged through the second outlet 313 to the next process, such as entering the AI ​​intelligent sorting process or the automatic packaging line.

[0064] Example 6

[0065] Based on any of the above embodiments, refer to the appendix. Figure 3As shown in the figure, in this embodiment, the conveying mechanism 5 includes: a first conveyor belt 51, a lifting belt 52, and a second conveyor belt 53. The feed end of the first conveyor belt 51 is connected to the first outlet 312, the feed end of the lifting belt 52 is connected to the discharge end of the first conveyor belt 51, the feed end of the second conveyor belt 53 is connected to the output end of the lifting belt 52, and the output end is connected to the upper inlet of the second crushing chamber 12. It should be noted that the conveying mechanism 5 is only schematically shown in the figure. In actual applications, the conveying mechanism can adopt a closed-loop conveying method, and the conveying mechanism 5 can also adopt other settings, as long as it can realize the return of silicon material from the first outlet 312 to the second crushing chamber.

[0066] During setup, the jaw plates, screen plates, and conveyor belts that come into contact with the silicon material can be made of non-magnetic, wear-resistant materials (such as high-chromium cast iron or ceramic coating) to prevent contamination of the silicon material by metallic impurities. The crushing mechanism uses a variable frequency motor that automatically reduces speed when unloaded. The jaw plates feature a quick-release structure with bolts and locating pins for easy replacement. The conveyor belt can be quickly replaced, and a maintenance access channel is provided at the bottom. The crushing, feeding, screening, and conveying mechanisms are all intelligently controlled by a control system.

[0067] Any aspects not described in detail in this embodiment are techniques known in the art.

[0068] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A polycrystalline silicon material crushing device, characterized in that, include: The crushing mechanism is provided with a first crushing chamber and a second crushing chamber; A feeding mechanism is located above the crushing mechanism and is used to feed silicon material into the first crushing chamber; A screening mechanism is located below the crushing mechanism and is used to receive the crushed silicon material and classify it. The first feed hopper is connected at its upper end to the outlet end of the first crushing chamber and at its lower end to the feed hopper of the screening mechanism. The conveying mechanism has its feed end connected to the first outlet of the screening mechanism, and is used to convey the large material discharged from the first outlet to the second crushing chamber.

2. The crushing device according to claim 1, characterized in that, The crushing mechanism includes: The first and second moving jaw plates are driven and connected to the power structure; and The first and second fixed jaw plates are located on the outer sides of the two movable jaw plates; The first fixed jaw plate and the first movable jaw plate form a first crushing chamber, and the second movable jaw plate and the second fixed jaw plate form a second crushing chamber.

3. The crushing device according to claim 1, characterized in that, The screening mechanism includes: The screening box is located below the crushing mechanism. A first feed bin is provided on the top of one side of the box. Inside, there are two screen plates of different specifications arranged from top to bottom. The discharge end is provided with a first outlet, a second outlet, and a third outlet for discharging different grades of silicon material. A vibration mechanism is installed at the bottom of the screening box; The dust removal mechanism is connected to the first dust removal port on the screening box.

4. The crushing device according to claim 3, characterized in that, The first feed hopper includes a feed section and a discharge section whose size gradually decreases, connected in sequence, with the discharge section extending into the first feed hopper.

5. The crushing device according to claim 4, characterized in that, The first feeding hopper is also provided with a shell on its outer side, and the first guiding hopper is installed on the shell. The shell is provided with a second dust removal port that is connected to the dust removal mechanism.

6. The crushing device according to claim 3, characterized in that, The screening box is also equipped with a second feed hopper, which is located below the second crushing chamber and is connected to the second crushing chamber through a second guide hopper.

7. The crushing device according to claim 6, characterized in that, The second feed hopper includes a feed section and a discharge section whose size gradually decreases, connected in sequence, with the discharge section of the second feed hopper extending into the second feed hopper.

8. The crushing device according to claim 7, characterized in that, The first and second feed bins are covered by a housing, and the first and second guide bins are both installed on the housing, with the discharge section of the guide bins extending into the corresponding feed bins.

9. The crushing device according to claim 1, characterized in that, A conveying device is provided below the outlet of the second crushing chamber.

10. The crushing device according to claim 1, characterized in that, The conveying mechanism includes: The first conveyor belt has its inlet end connected to the first outlet. The lifting belt has its feed end connected to the discharge end of the first conveyor belt; The second conveyor belt has its feed end connected to the output end of the lifting belt, and its output end connected to the inlet of the second crushing chamber.

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