Polysilicon crushing and screening system

Abstract

The utility model provides a kind of polysilicon crushing screening system, the purpose is to solve the technical problems of the particle size deviation of the silicon material after screening during the production of existing polysilicon.The system includes crushing mechanism, screening mechanism, back mechanism, sorting mechanism and broken material collecting device, the feeding end of screening mechanism is communicated with the discharge end of crushing mechanism, the feeding end of back mechanism is communicated with the large material outlet of screening mechanism, the discharge end is communicated with the feeding end of crushing mechanism, the import of sorting mechanism is communicated with the to-be-sorted material outlet of screening mechanism, and the broken material collecting device is communicated with the broken material outlet of screening mechanism.The utility model first carries out primary screening through screening mechanism, controls the silicon material in key interval, then further classifies by feeding it into the additionally added sorting mechanism, and the sorting mechanism classifies again according to the particle size of silicon material, so as to reduce the appearance quality deviation of each bag product, and change the polysilicon packaging into more fine control.

Description

Technical Field

[0001] This utility model relates to the field of polycrystalline silicon production technology, and in particular to a polycrystalline silicon crushing and screening system. Background Technology

[0002] Currently, the sorting of polysilicon raw materials in the polysilicon industry mostly uses a combination of crushers and screening machines for particle size sorting. Due to the irregularity of particle size after crushing, and the constraints of factors such as screen aperture, screen density, and screen blockage, there is a certain proportion of particle size deviation in the screened polysilicon, resulting in a high degree of randomness in the quality characteristics of the final product, and the appearance and quality of each bag of product are uncontrollable. 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 crushing and screening system, which solves the technical problem that the silicon material after screening during the production of existing polycrystalline silicon has a large particle size deviation.

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

[0005] A polycrystalline silicon crushing and screening system includes: a crushing mechanism; a screening mechanism, the feed end of which is connected to the discharge end of the crushing mechanism; a return mechanism, the feed end of which is connected to the large material outlet of the screening mechanism, and the discharge end of which is connected to the feed end of the crushing mechanism, for returning the screened large material to the crushing mechanism for further crushing; a sorting mechanism, the inlet of which is connected to the material to be sorted outlet of the screening mechanism, for classifying the material to be sorted; and a crushed material collection device connected to the crushed material outlet of the screening mechanism.

[0006] This invention first uses a screening mechanism for initial screening to control the silicon material within a critical range. It then sends the material to an additional sorting mechanism for further grading and sorting. This sorting mechanism performs a second, more precise grading based on the silicon particle size, reducing the appearance quality deviation of each bag of product and transforming polysilicon packaging into a more refined management system. Furthermore, automatic return of large pieces ensures raw material utilization and reduces waste; separate handling of broken pieces prevents them from entering the sorting process, thus improving the sorting efficiency.

[0007] Optionally, the return mechanism includes: a first conveying device, the inlet of which is connected to the outlet of the large material; a second conveying device, disposed on one side of the crushing mechanism and the screening mechanism, the feed end of which is connected to the outlet end of the first conveying device; and a third conveying device, the inlet of which is connected to the outlet end of the second conveying device, and the outlet end of which is connected to the feed end of the crushing mechanism.

[0008] Optionally, the sorting mechanism includes: a conveying mechanism; a vision recognition unit disposed above the conveying mechanism for real-time detection of the size of silicon material on the conveying mechanism; a rejection execution mechanism disposed on one side of the discharge end of the conveying mechanism; a graded collection unit disposed below the conveying mechanism and the rejection execution mechanism; and a controller electrically connected to the vision recognition unit and the rejection execution mechanism for controlling the action of the rejection execution mechanism based on the detection result of the vision recognition unit.

[0009] This invention can detect the maximum diagonal size and volume characteristics of silicon material in real time, and sort it into the corresponding bins through a rejection mechanism. This completely solves the problems of missed screening and incorrect screening caused by the irregular shape of silicon material in traditional screening processes. It significantly improves the dimensional qualification rate of the sorted silicon material, greatly enhancing product consistency and customer satisfaction. Moreover, the entire process requires no manual supervision, eliminates the manual re-inspection step, avoids quality fluctuations caused by human factors, and boasts high sorting efficiency.

[0010] Optionally, the rejection mechanism includes an actuator and a pusher plate. The actuator is located on one side of the discharge end of the conveying mechanism, and the pusher plate is located on the movable end of the actuator. The input end of the actuator is electrically connected to a controller, and the controller controls the extension and retraction of the actuator according to the silicon material size detected by the visual recognition unit.

[0011] Optionally, the rejection mechanism includes multiple actuators and push plates. The multiple actuators are arranged along the width direction of the conveying mechanism. Each actuator has a push plate at its movable end. The input end of each actuator is electrically connected to the controller. The controller controls the actuator at the corresponding position to move according to the silicon material size and position information detected by the visual recognition unit.

[0012] Optionally, the pusher plate has an inclined surface on the side facing the conveying mechanism.

[0013] Optionally, the graded collection unit includes a first hopper and a second hopper. The first hopper is located below one side of the rejection actuator, and the second hopper is located next to the first hopper. When the size of the silicon material detected by the visual recognition unit is greater than a preset value, the controller controls the rejection actuator to push the silicon material into the second hopper.

[0014] Optionally, the graded collection unit includes a first hopper, a second hopper, and a third hopper arranged sequentially along the pushing direction of the rejection actuator. When the size of the silicon material detected by the visual recognition unit is greater than a first preset value, the rejection actuator extends to the first stroke to push the silicon material into the second hopper; when the size of the silicon material detected by the visual recognition unit is greater than a second preset value, the rejection actuator extends to the second stroke to push the silicon material into the third hopper.

[0015] Optionally, each silo has an open top and a discharge port at the bottom. Each discharge port is equipped with a transfer mechanism and a finished product silo. The transfer mechanism is used to transport the sorted silicon material to the corresponding finished product silo.

[0016] Optionally, the transfer mechanism includes: a fourth conveying device, the inlet of which is located below the outlet of the silo; a fifth conveying device, the input of which is connected to the output of the fourth conveying device; and a sixth conveying device, the input of which is connected to the output of the fifth conveying device, and the output of which is connected to the finished product silo.

[0017] Optionally, an automatic packaging line is installed on one side of the finished product silo. The automatic packaging line includes, in sequence, a conveying unit, a shaping mechanism, a sealing mechanism, a weighing unit, and a rejection mechanism. Seamless connection with the automatic packaging line enables automated and intelligent operation.

[0018] Optionally, the scrap collection device includes: a scrap bin; a seventh conveying device, the inlet end of which is connected to the scrap outlet, and the outlet end of which is connected to the inlet at the top of the scrap bin.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model first uses a screening mechanism for initial screening to control the silicon material within a critical range. Then, it is sent to an additional sorting mechanism for further grading and sorting. The sorting mechanism performs a second, finer grading based on the silicon particle size, reducing the appearance quality deviation of each bag of product and transforming polysilicon packaging into a more refined management system. Furthermore, automatic return of large particles ensures raw material utilization and reduces waste; independent handling of broken particles prevents them from entering the sorting process, thus improving the sorting effect.

[0021] 2. The sorting mechanism in this invention uses AI visual recognition technology to detect the maximum diagonal size and volume characteristics of the silicon material in real time. It then sorts the silicon material into corresponding bins via a rejection actuator. This completely solves the problems of missed screening and incorrect screening caused by the irregular shape of the silicon material in traditional screening processes. Simultaneously, it identifies and sorts the silicon material based on its condition, effectively improving the dimensional qualification rate of the sorted silicon material and significantly enhancing product consistency and customer satisfaction. Furthermore, the entire process requires no manual supervision and eliminates the need for manual re-inspection, avoiding quality fluctuations caused by human factors and achieving high sorting efficiency. It also seamlessly connects with automatic packaging lines to achieve automated and intelligent operation. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of one embodiment of the polycrystalline silicon crushing and screening system of this utility model.

[0024] Figure 2 This is a schematic diagram of one embodiment of the sorting mechanism in this utility model.

[0025] Figure 3 This is a schematic diagram of the structure of the present invention without the actuator.

[0026] Figure 4 This is a schematic diagram of the structure of Example 5.

[0027] Figure label:

[0028] 1. Crushing mechanism;

[0029] 2. Screening mechanism; 21. Large material outlet; 22. Material to be sorted outlet; 23. Crushed material outlet;

[0030] 3. Return mechanism; 31. First conveying device; 32. Second conveying device; 33. Third conveying device;

[0031] 4. Sorting mechanism; 41. Conveying mechanism; 42. Vision recognition unit; 43. Rejection mechanism; 431. Actuator; 432. Push plate; 44. Grading and collection unit; 441. First hopper; 442. Second hopper; 443. Third hopper; 45. Controller; 46. Computer;

[0032] 5. Transfer mechanism; 51. Fifth conveying device; 52. Sixth conveying device;

[0033] 6. Finished product silo;

[0034] 7. Crushed material collection device; 71. Crushed material bin; 72. Seventh conveying device;

[0035] 8. Automated packaging line. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0043] Example 1

[0044] like Figure 1 As shown in the figure, this utility model application provides a polycrystalline silicon crushing and screening system, including: a crushing mechanism 1, a screening mechanism 2, a return mechanism 3, a sorting mechanism 4, and a fragment collection device.

[0045] The crushing mechanism 1 is used to crush polycrystalline silicon raw materials. The feed end of the screening mechanism 2 is connected to the discharge end of the crushing mechanism 1. The screening mechanism 2 is provided with a large material outlet 21, a material to be sorted outlet 22, and a crushed material outlet 23. The feed end of the return mechanism 3 is connected to the large material outlet 21, and the discharge end is connected to the feed end of the crushing mechanism 1. It is used to return the large material that does not meet the standards after screening to the crushing mechanism 1 for secondary crushing. The inlet of the sorting mechanism 4 is connected to the material to be sorted outlet 22. It receives the material to be sorted and performs grading treatment on it. The crushed material collection device is connected to the crushed material outlet 23. It is used to collect crushed materials with smaller particle sizes.

[0046] In use, polysilicon raw materials enter the crushing mechanism 1 for crushing and then enter the screening mechanism 2. The screening mechanism 2 classifies and screens the materials according to particle size. Larger particles that do not pass through the screen are discharged through the large material outlet 21 and returned to the crushing mechanism 1 by the return mechanism 3 for re-crushing. Medium-sized particles enter the sorting mechanism 4 for grading after passing through the material to be sorted outlet. Particles that are too small are directly discharged into the crushed material collection device through the crushed material outlet 23 for collection. The initial screening by the screening mechanism 2 controls the polysilicon material to be sorted within the required critical range, and then it is sent to the sorting mechanism 4 for fine grading, thereby greatly reducing the appearance quality deviation of each bag of product.

[0047] Example 2

[0048] Based on Embodiment 1, in this embodiment, the return mechanism 3 includes a first conveying device 31, a second conveying device 32, and a third conveying device 33.

[0049] The inlet end of the first conveying device 31 is connected to the large material outlet 21; the second conveying device 32 is located on one side of the crushing mechanism 1 and the screening mechanism 2, the feed end of the second conveying device 32 is connected to the outlet end of the first conveying device 31, and the discharge end is connected to the feed end of the third conveying device 33; the inlet end of the third conveying device 33 is connected to the outlet end of the second conveying device 32, and the outlet end is connected to the feed end of the crushing mechanism 1.

[0050] Optionally, the first conveyor 31 and the third conveyor 33 may be lifting belts, and the second conveyor 32 may be a horizontally arranged conveyor belt.

[0051] In use, the larger silicon particles intercepted by the screening mechanism 2 are discharged to the first conveying device 31 through the large material outlet 21. After receiving the large material, the first conveying device 31 conveys it to the second conveying device 32, the second conveying device 32 then conveys it to the third conveying device 33, and finally the third conveying device 33 sends it into the crushing mechanism 1 for further crushing.

[0052] Example 3

[0053] Based on embodiment 1 or 2, in this embodiment, the sorting mechanism 4 includes: a conveying mechanism 41, a visual recognition unit 42, a rejection execution mechanism 43, a graded collection unit, and a controller.

[0054] The feed end of the conveying mechanism 41 is located at the lower end of the outlet 22 of the material to be sorted, and is used to receive the material to be sorted screened out by the screening mechanism 2; the rejection execution mechanism 43 is set on one side of the discharge end of the conveying mechanism 41; the vision recognition unit 42 is set above the conveying mechanism 41, and is used to detect the size of the silicon material entering the detection area in real time; the grading collection unit is set below between the conveying mechanism 41 and the rejection execution mechanism 43; the controller is electrically connected to the vision recognition unit 42 and the rejection execution mechanism 43 respectively; the controller receives the detection signal from the vision recognition unit 42 and controls the opening and closing of the rejection execution mechanism 43 according to the detection signal.

[0055] In operation, the AI ​​intelligent recognition system first models the size of the silicon material and sets the size to be rejected. When the silicon material to be sorted, screened by the screening mechanism 2, is fed onto the conveying mechanism 41, the conveying mechanism 41 carries the silicon material into the detection area of ​​the vision recognition unit 42. The vision recognition unit 42 identifies the silicon material in the detection area. When the size of the silicon material exceeds the preset value, the rejection execution mechanism 43 is activated to reject the silicon material that exceeds the standard. The grading and collection unit includes at least two hoppers, each with an open top. When the silicon material does not exceed the preset value, it falls directly into one hopper due to inertia under the operation of the belt conveyor mechanism 41. When the size of the silicon material exceeds the preset value, the rejection execution mechanism is activated to push the silicon material into other hoppers.

[0056] Example 4

[0057] like Figure 2 and Figure 3 As shown in the figure, the present utility model application provides a sorting mechanism for a polycrystalline silicon crushing and screening system. The sorting mechanism 4 includes: a conveying mechanism 41, a vision recognition unit 42, a rejection execution mechanism 43, a grading collection unit 44, and a controller 45.

[0058] The feed end of the conveying mechanism 41 is located at the lower end of the outlet 22 of the material to be sorted, and is used to receive the material to be sorted screened out by the screening mechanism 2; the rejection execution mechanism 43 is set on one side of the discharge end of the conveying mechanism 41; the vision recognition unit 42 is set above the conveying mechanism 41, and is used to detect the size of the silicon material entering the detection area in real time; the grading collection unit 44 is set below the conveying mechanism 41 and the rejection execution mechanism 43, and the grading collection unit 44 includes at least two hoppers, and the top of each hopper is open; the controller 45 is electrically connected to the vision recognition unit 42 and the rejection execution mechanism 43 respectively, and the controller 45 receives the detection signal from the vision recognition unit 42 and controls the opening and closing of the rejection execution mechanism 43 according to the detection signal.

[0059] In use, the AI ​​intelligent recognition system is first used to model the size of the silicon material and set the size to be rejected. When the silicon material to be sorted by the screening mechanism 2 is put into the conveying mechanism 41, the conveying mechanism 41 drives the silicon material into the detection area of ​​the vision recognition unit 42. The vision recognition unit 42 identifies the silicon material in the detection area. When the silicon material does not exceed the preset value, the silicon material falls directly into a hopper due to inertia under the operation of the belt conveyor mechanism 41. When the size of the silicon material is greater than the preset value, the actuator 431 is activated to push the silicon material into other hoppers.

[0060] Furthermore, the removal mechanism 43 includes an actuator 431 and a pusher plate 432 disposed on the movable end of the actuator 431. The input end of each actuator 431 is electrically connected to the controller 45. The controller 45 adjusts the action of the corresponding actuator 431 according to the size of the silicon material, so that the actuator 431 drives the pusher plate 432 to push the corresponding silicon material into the corresponding hopper.

[0061] In this implementation scenario, the rejection mechanism 43 includes multiple actuators 431 arranged along the width of the conveying mechanism 41. Each actuator 431 has a pusher plate 432 at its movable end. The input of each actuator 431 is electrically connected to the controller 45. The controller 45 precisely controls the action of the actuators 431 in the corresponding area based on the size and position information of the silicon material detected by the vision recognition unit 42, ensuring that the pusher plate 432 only acts on the target silicon material in front, pushing it into the designated hopper. In use, when the vision recognition unit 42 detects that the silicon material exceeds the standard at a certain position, the controller 45 activates the actuator 431 corresponding to that position, and the pusher plate 432 pushes the silicon material to the target hopper. Through multiple independently controlled actuators and pushers, each actuator 431 only sorts the silicon material directly in front of it, avoiding erroneous actions that interfere with adjacent silicon materials. The coordinated work of multiple actuators can simultaneously reject excess material in different areas of the conveying mechanism 41, resulting in high sorting efficiency. The specific number of actuators 431 can be flexibly increased or decreased according to production capacity requirements.

[0062] Optionally, the conveying mechanism 41 may be a belt conveyor, and the actuator 431 may be an electric cylinder or a pneumatic cylinder.

[0063] Optionally, the pusher plate 432 has an inclined surface on the side facing the conveying mechanism 41, with the inclined surface pointing towards the conveying mechanism 41. In use, in the initial state (when the actuator is not activated), the pusher plate is located above and to the left of the first hopper. In this way, when the silicon material is thrown out in a parabolic trajectory due to inertia, the pusher plate 432 can block some of the silicon material that meets the standard. That is, some of the thrown silicon material can fall into the first hopper below after passing through the ramp formed by multiple inclined surfaces. At the same time, the inclined surface also facilitates the removal of silicon material.

[0064] In one embodiment, the graded collection unit 44 includes a first hopper 441, a second hopper 442, and a third hopper 443. The three hoppers are arranged sequentially from one end of the rejection actuator 43, namely: the first hopper 441 is located close to the rejection actuator 43, the second hopper 442 is located between the first hopper 441 and the third hopper 443, and the third hopper 443 is located below the outlet end of the conveying mechanism 41. In use, the size of the silicon material is first modeled, and a first preset value and a second preset value for rejection are set. When the size of the silicon material is smaller than the first preset value, the rejection actuator 43 does not operate, and the silicon material falls directly into the first hopper 441 due to inertia under the operation of the belt conveyor mechanism 41. When the size of the silicon material is larger than the first preset value, the rejection actuator 43 extends to the first stroke (short stroke) to push the silicon material into the second hopper 442. When the size of the silicon material is larger than the second preset value, the rejection actuator 43 extends to the second stroke (long stroke) to push the silicon material into the third hopper 443.

[0065] As an implementation scenario, in this scenario, when the actuator 431 is not activated, the pusher plate 432 can be located above the left side of the first hopper 441. When the actuator 431 performs the first stroke, the pusher plate 432 can extend to the middle or the top right side of the first hopper 441. When the actuator 431 performs the second stroke, the pusher plate 432 can extend to the top right side or the top right side of the first hopper 441. Thus, the silicon material located above the first hopper 441 and in the process of falling enters the second hopper 442 or the third hopper 443 under the action of the pusher plate 432.

[0066] In practical applications, polycrystalline silicon is classified into dense silicon (with a dense surface and cross-sectional structure, a flat silicon rod surface, and surface unevenness less than 5mm), loose silicon (with surface unevenness of 5-20mm, internal gaps less than 20mm, or internal pores), and coral silicon (with internal gaps >20mm, loose structure, needle-like or internal pores and crevices). During use, when modeling and setting the size to be rejected using an AI intelligent recognition system, the first preset value is set as loose silicon, and the second preset value is set as dense silicon. During use, coral silicon, due to inertia, falls directly into the first hopper 441 under the rapid operation of the belt conveyor mechanism 41. When silicon is identified as loose silicon, the rejection actuator 43 pushes it into the second hopper 442; when identified as dense silicon, the rejection actuator 43 pushes it into the third hopper 443. The silicon material entering each bin is then discharged to the next process via the corresponding conveyor through the outlet at the bottom of the bin. This design enables the system to identify and sort the silicon material, assigning different material conditions to their respective bins, thus ensuring controllable silicon material condition ratios and ultimately controlling the appearance quality deviation of each bag of product.

[0067] In other embodiments, the graded collection unit 44 may also use two hoppers. When in use, the size of the silicon material is first modeled and a preset value for rejection is set. When the size of the silicon material is smaller than the preset value, the silicon material falls directly into one hopper due to inertia under the operation of the belt conveyor mechanism 41. When the size of the silicon material is larger than the preset value, the rejection actuator 43 is activated to push the silicon material into the other hopper.

[0068] In one embodiment, the visual recognition unit 42 includes a high-definition CCD camera. The surface of the middle part or near the exit end of the conveying mechanism 41 is designed as a detection area. The high-definition CCD camera is mounted above this detection area via a mounting bracket, and its output end is electrically connected to the input end of the controller 45. In use, the size of the silicon material is first modeled, and the rejection size is set. When the silicon material enters the detection area, the high-definition CCD camera takes a picture to obtain an image of the silicon material. The controller 45 receives the data collected by the high-definition CCD camera and makes a judgment based on the set rejection size. When the size deviates from the set value, the rejection execution mechanism 43 is activated. Specifically, under the rapid operation of the belt conveyor mechanism 41, the silicon material will be thrown out at the exit end in a parabolic trajectory due to inertia. Normal silicon material falls directly into the hopper below, while silicon material exceeding the set value is rejected by the rejection execution mechanism 43.

[0069] In another embodiment, the visual recognition unit 42 and the controller 45 can be connected via a computer 46. The visual recognition unit 42 includes a high-definition CCD camera. The output of the high-definition CCD camera is electrically connected to the input of the computer, the output of the computer is electrically connected to the input of the controller 45, and the output of the controller 45 is electrically connected to the input of the rejection execution mechanism 43. In use, the computer 46 first models the size of the silicon material and sets the rejection size. When the silicon material enters the detection area, the high-definition CCD camera takes a picture to obtain an image of the silicon material. The computer 46 receives the data collected by the camera, judges it according to the set rejection size, and transmits the data to the controller 45. The controller controls the action of the rejection execution mechanism 43. Under the rapid operation of the belt conveyor mechanism 41, the silicon material will be thrown out at the exit end in a parabolic trajectory due to inertia. Normal silicon material falls directly into the designated hopper, while silicon material exceeding the set size is rejected by the rejection execution mechanism 43.

[0070] Example 5

[0071] like Figure 4 As shown in the figure, the present invention provides a polycrystalline silicon crushing and screening system, which also includes multiple sets of transfer mechanisms 5 for transferring the silicon material sorted by the sorting mechanism 4 to the next process. Each hopper is equipped with a transfer mechanism 5 and a finished product hopper 6. The transfer mechanism 5 is used to transport the sorted silicon material to the corresponding finished product hopper 6.

[0072] Specifically, the transfer mechanism 5 includes a fourth conveying device, a fifth conveying device 51, and a sixth conveying device 52. The feed end of the fourth conveying device is located below the discharge port of the silo, and its output end is connected to the input end of the fifth conveying device 51. The output end of the fifth conveying device 51 is connected to the input end of the sixth conveying device 52, and the output end of the sixth conveying device 52 is connected to the finished product silo 6.

[0073] This embodiment primarily uses a three-bin grading collection unit. The output ends of the first, second, and third bins are each equipped with a transfer mechanism 5, and the output ends of each of the three transfer mechanisms 5 are respectively equipped with a finished product bin 6. The fourth conveying device is not shown in the diagram; it can be a horizontally arranged conveyor belt. Each of the three bins has a corresponding fourth conveying device below its outlet. When the three bins are arranged horizontally in sequence, the three fourth conveying devices can be arranged from top to bottom with a stepped inlet structure. The fifth conveying device 51 can be a lifting belt.

[0074] In use, the three finished product bins can be configured as coral material finished product bins, loose material finished product bins, and dense material finished product bins adapted to the three bins. The three finished product bins receive silicon material from the first bin, the second bin, and the third bin through corresponding conveying devices. In one embodiment, the fragment collection device 7 includes a fragment bin 71 and a seventh conveying device 72. The feed end of the seventh conveying device 72 is connected to the fragment outlet 23 of the screening mechanism 2, and the discharge end is connected to the feed port at the top of the fragment bin 71.

[0075] In one embodiment, an automatic packaging line 8 is provided on one side of the finished product silo 6. Exemplarily, the automatic packaging line 8 may include, in sequence, a conveying unit, a shaping mechanism, a sealing mechanism, a weighing unit, and a rejection mechanism. In use, the finished product silo 6 is equipped with a vibrating feeder and a precision counterweight system to proportionally weigh the silicon material before it enters the automatic packaging line 8. Specifically, the silicon material is conveyed by the conveying unit to the shaping mechanism for shaping, then enters the sealing mechanism for sealing, and after sealing, it is re-weighed by the weighing unit. Silicon material that fails the re-weighing is rejected by the rejection mechanism. The conveying unit, shaping mechanism, sealing mechanism, weighing unit, and rejection mechanism are all conventional automatic packaging equipment, and therefore will not be described in detail in this embodiment. Furthermore, the crushing mechanism 1, screening mechanism 2, and visual recognition rejection are all mature existing technologies, and their specific structures and working principles are known to those skilled in the art; therefore, they will not be described in detail in this embodiment. If a vibrating screen is used as the screening mechanism, the silicon material size modeling algorithm can automatically optimize the sorting parameters based on the crushing characteristics of different batches of silicon material (such as long strips, sheet-shaped materials) according to existing technology.

[0076] Any aspects not described in detail in this embodiment are techniques known in the art.

[0077] 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 crushing and screening system, characterized in that, include: Crushing mechanism (1); The screening mechanism (2) has its feed end connected to the discharge end of the crushing mechanism (1); The feed end of the return mechanism (3) is connected to the large material outlet (21) of the screening mechanism (2), and the discharge end is connected to the feed end of the crushing mechanism (1). It is used to return the screened large material to the crushing mechanism (1) for further crushing. The sorting mechanism (4) has its inlet connected to the material outlet (22) of the screening mechanism (2) and is used to classify the material to be sorted. The material collection device (7) is connected to the material outlet (23) of the screening mechanism (2).

2. The polycrystalline silicon crushing and screening system according to claim 1, characterized in that, The return mechanism (3) includes: The first conveying device (31) has its inlet end connected to the large material outlet (21); The second conveying device (32) is located on one side of the crushing mechanism (1) and the screening mechanism (2), and its feed end is connected to the outlet end of the first conveying device (31). The third conveying device (33) has its inlet end connected to the outlet end of the second conveying device (32), and its outlet end connected to the feed end of the crushing mechanism (1).

3. The polycrystalline silicon crushing and screening system according to claim 1, characterized in that, The sorting mechanism (4) includes: Conveying mechanism (41); A visual recognition unit (42) is disposed above the conveying mechanism (41) and is used to detect the size of the silicon material on the conveying mechanism (41) in real time. The actuator (43) is removed and is located on one side of the discharge end of the conveying mechanism (41); A graded collection unit (44) is disposed below the conveying mechanism (41) and the rejection execution mechanism (43); The controller (45) is electrically connected to the visual recognition unit (42) and the rejection execution mechanism (43) and is used to control the action of the rejection execution mechanism (43) according to the detection result of the visual recognition unit (42).

4. The polycrystalline silicon crushing and screening system according to claim 3, characterized in that, The rejection mechanism (43) includes an actuator (431) and a pusher plate (432). The actuator (431) is located on one side of the discharge end of the conveying mechanism (41), and the pusher plate (432) is located on the movable end of the actuator (431). The input end of the actuator (431) is electrically connected to the controller (45). The controller (45) controls the extension and retraction of the actuator (431) according to the silicon material size detected by the vision recognition unit (42). or, The rejection mechanism (43) includes multiple actuators (431) and push plates (432). The multiple actuators (431) are arranged along the width direction of the conveying mechanism (41). Each actuator (431) has a push plate (432) on its movable end. The input end of each actuator (431) is electrically connected to the controller (45). The controller (45) controls the actuator (431) at the corresponding position to move according to the silicon material size and position information detected by the vision recognition unit (42).

5. The polycrystalline silicon crushing and screening system according to claim 4, characterized in that, The push plate (432) has an inclined surface on the side facing the conveying mechanism (41).

6. The polycrystalline silicon crushing and screening system according to claim 3, characterized in that, The graded collection unit (44) includes a first hopper (441) and a second hopper (442). The first hopper (441) is located below one side of the rejection execution mechanism (43), and the second hopper (442) is located next to the first hopper (441). When the size of the silicon material detected by the visual recognition unit (42) is greater than a preset value, the controller (45) controls the rejection execution mechanism (43) to push the silicon material into the second hopper (442). or, The graded collection unit (44) includes a first hopper (441), a second hopper (442), and a third hopper (443) arranged sequentially along the pushing direction of the rejection actuator (43). When the size of the silicon material detected by the visual recognition unit (42) is greater than a first preset value, the rejection actuator (43) extends to the first stroke to push the silicon material into the second hopper (442). When the size of the silicon material detected by the visual recognition unit (42) is greater than a second preset value, the rejection actuator (43) extends to the second stroke to push the silicon material into the third hopper (443).

7. The polycrystalline silicon crushing and screening system according to claim 6, characterized in that, Each silo has an open top and a discharge port at the bottom. Each discharge port is equipped with a transfer mechanism (5) and a finished product silo (6). The transfer mechanism (5) is used to transport the sorted silicon material to the corresponding finished product silo (6).

8. The polycrystalline silicon crushing and screening system according to claim 7, characterized in that, The transfer mechanism (5) includes: The fourth conveying device has its inlet located below the outlet of the silo; The fifth conveying device (51) has its input end connected to the output end of the fourth conveying device; The sixth conveying device (52) has its input end connected to the output end of the fifth conveying device (51) and its output end connected to the finished product silo (6).

9. The polycrystalline silicon crushing and screening system according to claim 7, characterized in that, An automatic packaging line (8) is provided on one side of the finished product silo (6). The automatic packaging line (8) includes, in sequence: a conveying unit, a shaping mechanism, a sealing mechanism, a weighing unit, and a rejection mechanism.

10. The polycrystalline silicon crushing and screening system according to claim 1, characterized in that, The debris collection device (7) includes: Crushed material bin (71); The seventh conveying device (72) has its feed end connected to the crushed material outlet (23) and its discharge end connected to the feed port at the top of the crushed material bin (71).

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