Polycrystalline silicon block sorting equipment

Abstract

The utility model discloses a polycrystalline silicon block sorting device. Belongs to the technical field of electronic grade polycrystalline silicon post-processing, the polycrystalline silicon block sorting equipment comprises a conveying device and a screening device, the conveying device is suitable for conveying polycrystalline silicon blocks, the screening device comprises a visual detection assembly and a screening execution assembly which are in communication connection, and the screening execution assembly detects the number N of holes of each polycrystalline silicon block through the visual detection assembly; and the polycrystalline silicon blocks with N greater than or equal to 3 are taken out from the conveying device, so that the automatic sorting of the polycrystalline silicon blocks is realized, the labor cost is saved, the production efficiency of a production line is improved, and human errors can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic grade polycrystalline silicon post-processing technical field, and specifically, relates to a polycrystalline silicon block sorting equipment. BACKGROUND

[0002] The last link of electronic grade polycrystalline silicon production process is post-processing, and the post-processing device includes polycrystalline silicon block crushing, cleaning, packaging, silicon core processing, cleaning, silicon core preparation and other processes. When the polycrystalline silicon block crushing process is performed, the qualified finished product silicon rod delivered from reduction is transported to a crushing preparation room. First, a special metal hammer is used to remove graphite heads, and then the silicon rod is placed on an impact-resistant operation table in the crushing room. The silicon rod is crushed, and the obtained polycrystalline silicon block is manually pushed into a sorting sieve, so that the length of the polycrystalline silicon block is 6mm to 100mm. The unqualified polycrystalline silicon block is crushed again. The polycrystalline silicon block after sorting needs to be manually observed to determine whether the surface contains holes. The polycrystalline silicon block containing three or more holes is picked out to prevent the polycrystalline silicon block containing three or more holes from entering the cleaning (pickling), drying and subsequent packaging links, so that the polycrystalline silicon block containing three or more holes can be prevented from finally reaching the client, and serious consequences such as crystal pulling breakage can be avoided.

[0003] Because the polycrystalline silicon block obtained through manual crushing usually has irregular shape, various cross sections and random size distribution, it is very difficult and challenging to manually pick out the polycrystalline silicon block with holes. Not only is it labor-consuming and inefficient, but also human error is likely to occur. The polycrystalline silicon block with three or more holes may flow into the next process due to screening failure, which is likely to cause complaints from downstream customers. UTILITY MODEL CONTENTS

[0004] The utility model aims to solve at least one of the above technical problems in the prior art to some extent. To this end, the utility model provides a polycrystalline silicon block sorting equipment, which can automatically sort polycrystalline silicon blocks, save labor costs, improve production efficiency of the production line, and reduce human errors.

[0005] The polycrystalline silicon block sorting equipment according to the utility model embodiment includes a conveying device and a screening device. The conveying device is suitable for conveying polycrystalline silicon blocks. The screening device includes a visual detection component and a screening execution component connected in communication. The screening execution component detects the number N of holes of each polycrystalline silicon block through the visual detection component and takes out the polycrystalline silicon block with N≥3 from the conveying device.

[0006] The polycrystalline silicon block sorting equipment according to the utility model embodiment can detect the number N of holes of the polycrystalline silicon block through the visual detection component and take out the polycrystalline silicon block with N≥3 from the conveying device, so as to automatically sort the polycrystalline silicon blocks, save labor costs, improve production efficiency of the production line, and reduce human errors.

[0007] According to some embodiments of the present application, the visual detection assembly comprises: a diffuse reflection light box and a visual detection module, the diffuse reflection light box is arranged on at least part of the conveying device, and a plurality of light supplementing lamps are arranged in the diffuse reflection light box; the visual detection module is arranged in the diffuse reflection light box, and the visual detection module is used for collecting visual images in the diffuse reflection light box to determine the hole number N of each polysilicon block.

[0008] According to some embodiments of the present application, the conveying device transports the polysilicon block through the diffuse reflection light box for a time t, and the relationship 30s≤t≤60s is met.

[0009] According to some embodiments of the present application, the visual detection module comprises: a plurality of cameras, and the shooting directions of at least two cameras are different.

[0010] According to some embodiments of the present application, in the plurality of cameras, the shooting direction of at least one camera is parallel to the direction of gravity.

[0011] According to some embodiments of the present application, in the plurality of cameras, the included angle between the shooting direction of at least one camera and the direction of gravity is α, and the relationship 30°≤α≤60° is met.

[0012] According to some embodiments of the present application, the conveying belt of the conveying device conveying the polysilicon block is a transparent material piece, and at least one camera is arranged on the upper and lower sides of the conveying belt.

[0013] According to some embodiments of the present application, the number of the screening devices is multiple, and the multiple screening devices are arranged at intervals in the direction in which the conveying device conveys the polysilicon block.

[0014] According to some embodiments of the present application, the polysilicon block sorting equipment further comprises: a turnover robot, the turnover robot is suitable for turning over each polysilicon block up and down between any two adjacent screening devices.

[0015] According to some embodiments of the present application, the turnover frequency of the turnover robot is greater than or equal to 20 times per minute.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of a polysilicon block sorting equipment and a polysilicon block according to the present application, wherein a screening execution assembly of a screening device is not shown;

[0018] Figure 2 is a flow chart of a method for using the polycrystalline silicon block sorting equipment according to the present application.

[0019] Reference signs:

[0020] Conveying device 1;

[0021] Visual inspection assembly 21; diffuse reflection light box 211; visual inspection module 212; camera 2121;

[0022] Turnover robot 3; polycrystalline silicon block sorting equipment 10; polycrystalline silicon block 20. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the present application, it is understood that the terms "upper", "lower", "front", "rear", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0026] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The specific embodiments of the present application will be described below in conjunction with Figure 1The polycrystalline silicon block sorting equipment 10 according to the embodiment of the utility model is described in detail.

[0028] Referring to Figure 1 As shown in the figure, the polycrystalline silicon block sorting equipment 10 according to the embodiment of the utility model comprises a conveying device 1 and a screening device, the conveying device 1 is suitable for conveying polycrystalline silicon blocks 20, the screening device comprises a visual detection assembly 21 and a screening execution assembly which are communicatively connected, the screening execution assembly detects the hole number N of each polycrystalline silicon block 20 through the visual detection assembly 21, and polycrystalline silicon blocks 20 with N greater than or equal to 3 are taken out from the conveying device 1.

[0029] It can be understood that the polycrystalline silicon block sorting equipment 10 can realize automatic sorting of the polycrystalline silicon blocks 20, can automatically pick out polycrystalline silicon blocks 20 with a hole number greater than or equal to 3, is favorable for saving labor cost, and compared with the manual sorting mode, the visual detection assembly 21 can simultaneously detect the hole number of each polycrystalline silicon block 20, can improve the production efficiency of a production line, and can also reduce human errors, thereby being favorable for reducing the risk that polycrystalline silicon blocks 20 with three or more holes finally reach a client end, reducing the risk of customer complaints, and being favorable for guaranteeing the product quality reputation of a company.

[0030] Specifically, the screening execution assembly can comprise a controller, a first mechanical arm and a gripper, the visual detection assembly 21 and the first mechanical arm are communicatively connected with the controller, the visual detection assembly 21 can acquire the image of the polycrystalline silicon block 20 by shooting the polycrystalline silicon block 20, then detect the hole number according to the image, when the visual detection assembly 21 detects the polycrystalline silicon block 20 with a hole number greater than or equal to 3, the visual detection assembly 21 can calculate the position of the polycrystalline silicon block 20 through a program, and send the position information of the polycrystalline silicon block 20 to the controller, the controller can control the first mechanical arm to drive the gripper to pick the polycrystalline silicon block 20, so as to pick out the polycrystalline silicon block 20 with a hole number greater than or equal to 3, realize automatic sorting of the polycrystalline silicon block 20, and avoid the polycrystalline silicon block 20 from flowing into the next process.

[0031] The polycrystalline silicon block sorting equipment 10 according to the embodiment of the utility model can detect the hole number N of the polycrystalline silicon block 20 through the visual detection assembly 21, and take out the polycrystalline silicon block 20 with N greater than or equal to 3 from the conveying device 1, realize automatic sorting of the polycrystalline silicon block 20, are favorable for saving labor cost, improving the production efficiency of a production line, and can also reduce human errors.

[0032] In some embodiments of the utility model, referring to Figure 1As shown, the visual detection assembly 21 comprises a diffuse reflection light box 211 and a visual detection module 212, the diffuse reflection light box 211 covers at least part of the conveying device 1, the diffuse reflection light box 211 has a plurality of light supplement lamps therein, and the visual detection module 212 is arranged in the diffuse reflection light box 211, and the visual detection module 212 is used for collecting a visual image in the diffuse reflection light box 211 to determine the hole number N of each polysilicon block 20.

[0033] It can be understood that the plurality of light supplement lamps can provide a uniform light environment, when the conveying device 1 conveys the polysilicon block 20 into the diffuse reflection light box 211, the plurality of light supplement lamps can uniformly light the outer surface of the polysilicon block 20 at different positions, which can avoid the shadow caused by the surface gully of the polysilicon block 20, and is beneficial to the visual detection module 212 to clearly collect the visual image of the polysilicon block 20, improve the collection accuracy of the visual image, and thus improve the accuracy of the visual detection assembly 21 in detecting the hole number, reduce the risk of misjudgment of the hole number, and improve the reliability of the polysilicon block sorting device 10.

[0034] In the present application, the inner wall of the diffuse reflection light box 211 can comprise a light guide plate and a reflective material, when the plurality of light supplement lamps emit light, the light will pass through the light guide plate and the reflective material, and through the refraction and reflection effect, a uniform light environment can be provided.

[0035] In some embodiments of the present application, the time for the conveying device 1 to convey the polysilicon block 20 through the diffuse reflection light box 211 is t, and the relationship formula is satisfied: 30s≤t≤60s, which can accurately detect the hole number of the polysilicon block 20 while improving the production efficiency of the production line.

[0036] It can be understood that when t<30s, the time for the conveying device 1 to convey the polysilicon block 20 through the diffuse reflection light box 211 is short, that is, the conveying device 1 conveys the polysilicon at a faster speed, and the visual detection module 212 is difficult to clearly collect the visual image of the polysilicon block 20, which may cause errors in detecting the hole number of the polysilicon block 20.

[0037] When t>60s, the time for the conveying device 1 to convey the polysilicon block 20 through the diffuse reflection light box 211 is long, that is, the conveying device 1 conveys the polysilicon at a slower speed, which affects the sorting efficiency of the polysilicon block 20 and leads to a lower production efficiency of the production line.

[0038] In the embodiment, t is in the range of 30s-60s, the time for the conveying device 1 to convey the polysilicon block 20 through the diffuse reflection light box 211 is moderate, that is, the speed of the conveying device 1 to convey the polysilicon block 20 is moderate, so that the visual detection module 212 can clearly acquire the visual image of the polysilicon block 20, thereby facilitating accurate detection of the hole number of the polysilicon block 20, and at the same time, the sorting efficiency of the polysilicon block 20 can be ensured, and the production efficiency of the production line is improved.

[0039] In some embodiments of the present application, referring to Figure 1 As shown in the figure, the visual detection module 212 comprises a plurality of cameras 2121, and the shooting directions of at least two cameras 2121 are different. It can be understood that the cameras 2121 with different shooting directions can acquire image information of different surfaces of the polysilicon block 20, thereby reducing the risk of missing shots, so as to facilitate the visual detection module 212 to accurately detect the hole number of the polysilicon block 20, reduce the risk of recognition deviation of the hole number of the polysilicon block 20, and reduce the risk of missing detection of the polysilicon block 20 with a hole number greater than or equal to 3, thereby facilitating to improve the reliability of the polysilicon block sorting device 10.

[0040] In some embodiments of the present application, in the plurality of cameras 2121, the shooting direction of at least one camera 2121 is parallel to the direction of gravity, and the direction of gravity can be Figure 1 the upward direction in the figure, and the camera 2121 can shoot the top surface of the polysilicon block 20 to acquire the image of the top surface of the polysilicon block 20 and detect the hole number of the top surface of the polysilicon block 20.

[0041] In some embodiments of the present application, in the plurality of cameras 2121, the shooting direction of at least one camera 2121 forms an angle α with the direction of gravity, and α satisfies the relationship: 30°≤α≤60°. The camera 2121 can shoot the side surface of the polysilicon block 20 to acquire the image of the side surface of the polysilicon block 20, thereby facilitating to realize comprehensive detection of the polysilicon block 20 and accurately detect the hole number of the polysilicon block 20.

[0042] In some embodiments of the present application, referring to Figure 1 As shown in the figure, the diffuse reflection light box 211 has a mounting groove, and the camera 2121 parallel to the direction of gravity can be mounted on the bottom wall of the mounting groove away from the slot, and the camera 2121 forming an angle α with the direction of gravity can be mounted on the side wall of the mounting groove, so as to detect a plurality of surfaces of the polysilicon block 20, thereby facilitating to accurately detect the hole number of the polysilicon block 20.

[0043] In some embodiments of the present application, the conveying belt of the conveying device 1 conveying the polysilicon block 20 is made of transparent material, and at least one camera 2121 is arranged on the upper and lower sides of the conveying belt, thereby facilitating the visual detection module 212 to accurately detect the hole number of the polysilicon block 20.

[0044] Understandably, the camera 2121 located on the upper side of the conveyor belt can directly photograph the top surface of the polysilicon block 20, thereby acquiring an image of the top surface of the polysilicon block 20. Since the conveyor belt is made of transparent material, the camera 2121 located on the lower side of the conveyor belt can photograph the bottom surface of the polysilicon block 20 through the conveyor belt, thereby acquiring an image of the bottom surface of the polysilicon block 20. This is beneficial for achieving comprehensive inspection of the polysilicon block 20, so as to accurately detect the number of holes in the polysilicon block 20.

[0045] The transmission belt can be made of glass, PU (polyurethane), etc. Both glass and PU have good wear resistance, which can reduce the wear of the transmission belt, improve the service life of the transmission belt, and avoid affecting the image acquisition effect of the camera 2121 located under the transmission belt.

[0046] In some embodiments of this utility model, reference is made to Figure 1 As shown, there are multiple screening devices, located in the direction in which the conveying device 1 conveys the polysilicon block 20, that is... Figure 1 The multiple screening devices are spaced apart in the direction from front to back, which helps to reduce the risk of missing polysilicon blocks 20 with more than or equal to 3 holes and improves the reliability of polysilicon block sorting equipment 10.

[0047] It is understandable that the conveying device 1 can convey polycrystalline silicon blocks 20 through multiple screening devices in sequence to screen the polycrystalline silicon blocks 20 multiple times. When a polycrystalline silicon block 20 with a number of holes greater than or equal to 3 passes through a screening device and is not picked up, the subsequent screening devices can still screen the polycrystalline silicon block 20. This can effectively reduce the risk of missing polycrystalline silicon blocks 20 with a number of holes greater than or equal to 3, and help improve the reliability of the polycrystalline silicon block sorting equipment 10.

[0048] In some embodiments of this utility model, reference is made to Figure 1 As shown, the polysilicon block sorting equipment 10 also includes a flipping robot 3, which is adapted to flip each polysilicon block 20 up and down between any two adjacent screening devices so that the top and bottom surfaces of the polysilicon block 20 are flipped so that both the top and bottom surfaces of the polysilicon block 20 can be identified and detected, ensuring no blind spots in identification. This facilitates comprehensive detection of the polysilicon block 20, reduces the risk of missing detection of silicon blocks with more than or equal to 3 holes, and improves the reliability of the polysilicon block sorting equipment 10.

[0049] The flipping robot 3 may include a connected second robotic arm and a shovel. When performing the flipping operation, the second robotic arm can drive the shovel to scoop up the polysilicon block 20, and then the second robotic arm flips the shovel to flip the polysilicon block 20.

[0050] In some embodiments of the utility model, the turnover frequency of the turnover robot 3 is greater than or equal to 20 times per minute, to ensure that each polysilicon block 20 can be turned over, which is conducive to realizing comprehensive detection of each polysilicon block 20, so as to accurately detect the hole number of each polysilicon block 20, and reduce the risk of missing detection of the silicon block with a hole number greater than or equal to 3, which is conducive to improving the reliability of the polysilicon block sorting equipment 10.

[0051] According to the polysilicon block sorting equipment 10 of the utility model embodiment, the image acquisition of the polysilicon block 20 is carried out in the diffuse reflection light box 211, the illumination is uniform, the shadow caused by the surface gully of the polysilicon block 20 can be avoided to the greatest extent, the image acquisition accuracy is improved, a plurality of cameras 2121 are used to take pictures at different angles, the image information of each face of the irregular polysilicon block 20 can be captured to the greatest extent, the recognition deviation caused by missing shooting is avoided, the turnover robot 3 is used to turn over the polysilicon block 20 multiple times, to ensure that there is no blind area in recognition as much as possible, the capture effect of the irregular face of the polysilicon block 20 is guaranteed to the greatest extent, the post recognition accuracy is improved, the polysilicon block sorting equipment 10 can automatically and accurately pick out the polysilicon block 20 with a number greater than or equal to 3, realizes the automatic sorting of the polysilicon block 20, which is conducive to saving labor cost and improving the production efficiency of the production line, and can reduce human errors.

[0052] Referring to Figure 2 As shown in the utility model, in some embodiments of the utility model, the use method of the polysilicon block sorting equipment 10 comprises:

[0053] Step S1: multiple camera image acquisition.

[0054] Among them, multiple cameras 2121 are distributedly arranged, multiple angle shooting is realized, to collect the images of multiple faces of the polysilicon block 20, the camera 2121 can be a high-resolution industrial camera and the like, and the resolution of the high-resolution industrial camera can be 48 million.

[0055] Step S2: label data set and train generation model.

[0056] Step S3: deploy model and import image, automatic recognition and detection.

[0057] Among them, after the image is imported into the model, the different types of gap defects of the polysilicon block 20 can be automatically recognized and detected.

[0058] Step S4: automatic sorting according to the recognition result.

[0059] Among them, the first mechanical arm drives the gripper to take out the polysilicon block 20 with a hole number greater than or equal to 3 from the conveying device 1, to realize the automatic sorting of the polysilicon block 20.

[0060] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0061] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A polycrystalline silicon block sorting device, characterized in that, include: A conveying device (1) adapted to convey polycrystalline silicon blocks (20); The screening device includes a vision inspection component (21) and a screening execution component connected in communication. The screening execution component detects the number N of holes in each polysilicon block (20) through the vision inspection component (21) and takes out polysilicon blocks (20) with N≥3 from the conveying device (1).

2. The polycrystalline silicon block sorting equipment according to claim 1, characterized in that, The visual inspection component (21) includes: A diffuse reflection light box (211) is provided, which covers at least part of the conveying device (1), and the diffuse reflection light box (211) has a plurality of supplementary lights inside; A visual inspection module (212) is provided inside the diffuse reflection light box (211). The visual inspection module (212) is used to collect visual images inside the diffuse reflection light box (211) to determine the number N of holes in each polysilicon block (20).

3. The polycrystalline silicon block sorting equipment according to claim 2, characterized in that, The time t for the conveying device (1) to convey the polycrystalline silicon block (20) through the diffuse reflection light box (211) satisfies the relationship: 30s≤t≤60s.

4. The polycrystalline silicon block sorting equipment according to claim 2, characterized in that, The visual detection module (212) includes: multiple cameras (2121), at least two of the cameras (2121) having different shooting directions.

5. The polycrystalline silicon block sorting equipment according to claim 4, characterized in that, In the plurality of cameras (2121), at least one of the cameras (2121) has its shooting direction parallel to the direction of gravity.

6. The polycrystalline silicon block sorting equipment according to claim 5, characterized in that, In the plurality of cameras (2121), at least one of the cameras (2121) has an angle α between its shooting direction and the direction of gravity, wherein α satisfies the relationship: 30°≤α≤60°.

7. The polycrystalline silicon block sorting equipment according to claim 4, characterized in that, The conveyor belt of the conveying device (1) that conveys the polycrystalline silicon block (20) is made of transparent material, and at least one camera (2121) is provided on both the upper and lower sides of the conveyor belt.

8. The polycrystalline silicon block sorting equipment according to any one of claims 1-7, characterized in that, The number of the screening devices is multiple, and the multiple screening devices are arranged at intervals in the direction in which the conveying device (1) conveys the polycrystalline silicon block (20).

9. The polycrystalline silicon block sorting equipment according to claim 8, characterized in that, The polysilicon block sorting equipment further includes a flipping robot (3), which is adapted to flip each polysilicon block (20) up and down between any two adjacent screening devices.

10. The polycrystalline silicon block sorting equipment according to claim 9, characterized in that, The flipping robot (3) has a flipping frequency of 20 times / minute or more.

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