Automatic suction and screening device

Abstract

The utility model discloses an automatic suction material and screening device, its characterized in that, including suction material bin, chassis, upper material bin, lower material bin, screen cloth and material box, the lower surface mounting material box of chassis, the upper surface mounting of chassis upper material bin and lower material bin, upper material bin sets up and installs the upper portion of lower material bin, suction material bin installs the upper portion of upper material bin, screen cloth installs the bottom of upper material bin and lower material bin, upper material bin and lower material bin are set up obliquely. The utility model discloses through installing the oblique angle of upper material bin and lower material bin, solves the problem of the particle diameter of the silicon material of different sizes and the small particle silicon material of plugging pipe, improves the efficiency of particle screening.

Description

Technical Field

[0001] This utility model relates to the field of material screening technology, and in particular to an automatic material suction and screening device. Background Technology

[0002] Currently, granular silicon technology has demonstrated considerable reliability and is gradually becoming a favorite in the industry. If granular silicon is cleverly integrated into CCZ technology, its potential may be limitless. Given the moderate particle size of approximately 2 mm, by precisely controlling the feeding speed and avoiding oscillations in the silicon molten metal, combined with a continuous process of crystal pulling and feeding, the pulling of monocrystalline silicon rods can proceed smoothly. Existing technologies suffer from problems such as inconsistent particle diameters and small particles clogging the feed tube; most methods still rely on manual sieving, which is not only inefficient and ineffective but also lacks dust removal capabilities.

[0003] Therefore, it is necessary to provide an automatic feeding and screening device to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the invention, to avoid obscuring the purpose of this section, the abstract and the title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an automatic material suction and screening device, characterized in that it includes a suction bin, a base frame, an upper vibrating bin, a lower vibrating bin, a screen, and a material box. The material box is installed on the lower surface of the base frame, and the upper vibrating bin and the lower vibrating bin are installed on the upper surface of the base frame. The upper vibrating bin is installed above the lower vibrating bin, the suction bin is installed on the upper vibrating bin, and the screen is installed at the bottom of the upper vibrating bin and the lower vibrating bin. The upper vibrating bin and the lower vibrating bin are inclined.

[0006] As a preferred embodiment of the automatic feeding and screening device of this utility model, the feeding bin is provided with a feeding pipe interface and a vacuum pipe interface.

[0007] As a preferred embodiment of the automatic feeding and screening device of this utility model, both the upper vibrating hopper and the lower vibrating hopper are provided with discharge ports.

[0008] In a preferred embodiment of the automatic feeding and screening device of this utility model, a rotating shaft and a rotating plate are installed inside the feeding bin, and a counterweight is provided on one side of the rotating plate. The rotating plate is installed in the feeding bin through the rotating shaft.

[0009] As a preferred embodiment of the automatic feeding and screening device of this utility model, an elastic component is provided between the lower vibrating hopper and the base frame.

[0010] In a preferred embodiment of the automatic feeding and screening device of this utility model, a support block is installed on the inner wall of the feeding chamber, and one side of the rotating plate with a counterweight is placed on the support block.

[0011] As a preferred embodiment of the automatic material suction and screening device of this utility model, the side wall of the upper vibrating hopper is provided with a spiral dust removal port.

[0012] As a preferred embodiment of the automatic material feeding and screening device of this utility model, a vibration motor is installed between the upper vibrating hopper and the lower vibrating hopper.

[0013] The beneficial effects of this utility model are as follows: By installing an inclined upper and lower vibrating hopper, this utility model solves the problems of inconsistent particle diameters in incoming silicon material and blockage of the material pipe by small silicon particles, thus improving the efficiency of particle screening. This utility model replaces manual screening; it is a small-scale screening device, simple to manufacture, and replaces manual screening, reducing labor and improving screening efficiency. The device has a dust removal method, reducing dust present in the silicon particles after screening. It has good screening effect, achieving a better screen passage rate through sufficient vibration. It is highly adaptable: by changing the screen, the device can adapt to various specifications and models of silicon particle size requirements, and screen replacement is simple. It is easy to maintain: the device adopts a modular design, with a simple structure, and each component is easy to disassemble and replace, facilitating maintenance. It is easy to operate: the operation is simple and easy to understand; screening can be completed through simple operating steps. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Figure 1 A schematic diagram of the overall structure of the automatic feeding and screening device according to an embodiment of this utility model;

[0016] Figure 2 A top view of the automatic feeding and screening device according to an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the suction bin of the automatic suction and screening device according to an embodiment of the present invention. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0021] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0022] Example 1

[0023] Reference Figures 1-3The first embodiment of this utility model provides an automatic material suction and screening device, characterized by comprising a suction bin 1, a base frame 10, an upper vibrating bin 2, a lower vibrating bin 5, a screen 8, and a material box 11. The material box 11 is installed on the lower surface of the base frame 10, and the upper vibrating bin 2 and the lower vibrating bin 5 are installed on the upper surface of the base frame 11. The upper vibrating bin 2 is positioned above the lower vibrating bin 5, the suction bin 1 is installed above the upper vibrating bin 2, and the screen 8 is installed at the bottom of the upper vibrating bin 2 and the lower vibrating bin 5. The upper vibrating bin 2 and the lower vibrating bin 5 are inclined. Specifically, the suction bin 1 is provided with a suction pipe interface 1.1 and a vacuum pipe interface 1.2. This utility model can automatically feed and screen materials, simultaneously satisfying the requirements of suction and screening. Specific operating procedures: First, place the device in an open area. Connect the spiral dust collector port 3 to the dust collector pipe, the suction pipe interface 1.1 to the PTFE suction pipe, and the vacuum pipe interface 1.2 to the vacuum pipe and vacuum pump. Then, turn on the vacuum pump to reduce the pressure inside the suction chamber 1, allowing the silicon material to enter the suction chamber 1 through the PTFE suction pipe interface 1.1. The sucked-in silicon material accumulates on the other side of the rotating plate 1.4 with the counterweight 1.3. When the weight of the sucked-in silicon material exceeds the weight of the counterweight 1.3, it will cause the rotating plate 1.4 to... The rotating shaft 1.5 flips over, causing the silicon material to slide to the discharge port 1.6 and enter the upper vibrating hopper 2. Silicon material smaller than the screen mesh size enters the lower vibrating hopper 5, while silicon material larger than the screen mesh size flows out through the discharge ports of the upper and lower vibrating hoppers. When the vibrating motor 7 is turned on, the upper and lower hoppers are connected to the base frame 10 by an elastic component, namely a return spring 9, which works in conjunction with a damper. This technology is existing and will not be elaborated here. Therefore, the hoppers are driven by the vibrating motor 7 to vibrate. At the same time, the silicon material sucked in by the suction pipe interface 1.1 is screened by vibration. The part that does not pass through the screen 8 flows out through the upper vibrating hopper outlet 4 for collection. The silicon particles that then enter the lower vibrating hopper 5 are vibrated again, pass through the screen 8, and enter the hopper 11. The silicon particles that do not pass through the screen 8 flow out through the lower vibrating hopper outlet 6 for collection. The dust generated during vibration is sucked out of the hopper through the three spiral dust collection ports, completing the screening process. Both the upper vibrating hopper 2 and the lower vibrating hopper 5 are provided with discharge ports. An elastic component is installed between the lower vibrating hopper 5 and the base frame 10. Spiral dust collection ports 3 are provided on the side walls of both the upper vibrating hopper 2 and the lower vibrating hopper 5.

[0024] This invention relates to a simple and convenient screening device. It features a small, square suction chamber 1 at the top, inside which a rotating plate 1.4 is installed. The rotating plate 1.4 is connected to the suction chamber 1 via a rotating shaft 1.5. A counterweight 1.3 is mounted on one side of the rotating plate 1.4, and a support block 1.7 is installed on the inner wall of the suction chamber 1 at the position of the counterweight 1.3. The rotating plate 1.4 remains balanced under normal conditions. When the weight on the other side exceeds the weight of the counterweight 1.3, the rotating plate 1.4 will flip. Under normal conditions, the suction chamber 1 is in a closed space. When the vacuum tube interface 1.2 is connected to the vacuum tube and evacuation begins, the pressure inside the suction chamber 1 is sufficient to allow silicon material to be normally drawn into the suction chamber 1 from the suction tube interface 1.1. Because this screening device is a double-layer screening device, it can screen two different particle size specifications of silicon material separately.

[0025] Dust removal interfaces, at different heights, are located on both sides of the upper vibrating hopper 2 and the lower vibrating hopper 5, for connecting dust removal pipes made of PTFE. During dust removal, a vortex airflow is formed inside the hopper, further removing dust generated by the vibration of the silicon material. The lower vibrating hopper 5 is connected to the base frame 10 by a return spring 9 and has a 15° inclination angle, causing the silicon material to roll out towards the discharge port during vibration. A 220V 100W synchronous vibration motor is installed at the rear of the vibrating hopper. Due to the elastic deformation of the return spring 9, the upper and lower hoppers vibrate, achieving a screening effect. Simultaneously, the vacuum tube interfaces 1.2 and the 3-spiral dust removal port 3 are wrapped with 200-mesh nylon mesh.

[0026] In use, connect the suction pipe interface 1.1 on the suction bin 1 to the PTFE suction pipe, connect the vacuum pipe interface 1.2 to the vacuum pipe and vacuum pump, start the vacuum pump to reduce the pressure in the suction bin 1, which will generate a pressure difference, thereby automatically sucking the silicon material into the suction bin 1, and then flowing into the upper and lower vibrating bins through the discharge port 1.6.

[0027] This utility model is a double-layer sieve: the upper part of the base frame 10 is connected to two upper and lower vibrating bins by a return spring 9. The upper and lower vibrating bins can be equipped with two different mesh sizes at the same time. By starting the vibration motor 7, the screening of two different particle sizes of silicon material can be completed respectively.

[0028] Additionally, it features a dust removal device: the upper vibrating hopper 2 and the lower vibrating hopper 5 each have a dust removal interface on their sides at different heights, used to connect dust removal pipes. The pipe openings are wrapped with 200-mesh nylon mesh. During dust removal, a vortex airflow is formed inside the hopper, further removing dust and silicon powder generated by the vibration of the silicon material. It also has a circulating screening function: the suction pipe interface 1.1 of the suction hopper 1 is connected to a PTFE suction pipe, and the suction pipe opening is connected to two suction pipes using a T-connector. These two suction pipe openings are then connected to the discharge ports of the upper and lower vibrating hoppers, respectively, to complete the circulating suction screening, ensuring the silicon material screening pass rate and screening effect.

[0029] This device also includes a PLC controller, sensors, and a human-machine interface (HMI). The PLC controller controls the material suction, screening time, and vibration frequency. During material suction, the suction time and dry pump frequency can be controlled to regulate the suction speed and hopper negative pressure. The screening process allows for control of the screening time, which can be adjusted according to actual needs. The vibration frequency can be adjusted based on the screening weight and the particle size of the silicon material at different weights. The 220V 100W synchronous vibration motor can meet the screening weight range of 0-50kg. Sensors: A particle level sensor is installed in the suction hopper; when the particle level reaches the upper limit, the sensor is triggered to start and stop the suction system. A weighing sensor is installed in the screening hopper to control the screening weight and prevent the screening weight from exceeding the vibration motor's load. Pressure sensors are installed in each pipeline to prevent pipeline blockage and other abnormalities. The HMI is a touchscreen interface that displays real-time data (such as screening efficiency and fault alarms).

[0030] For ease of cleaning, the device is lightweight, with the vibrating material bin weighing only 15kg, allowing for disassembly by a single person. After the suction and vibrating material bins are disassembled, a low-suction vacuum hose is used to remove surface-adhered silicon powder and any loose silicon material remaining inside. When cleaning the screen, the screen is secured with bolt washers; loosening the bolts allows for screen removal. The screen is then immersed in anhydrous ethanol for 10 minutes to dissolve any residue, dried with compressed air at a pressure below 0.2MPa, and reinstalled to complete the cleaning. The total cleaning time is 15 minutes, making it convenient and effective. If the silicon material exhibits electrostatic adsorption, an antistatic agent (such as 3% antistatic liquid FS-10) is sprayed before cleaning. After standing for 2 minutes, the surface is wiped with a scouring pad. Cleaning silicon powder that clumps and adheres to the surface after contact with water: There are a large number of silanol groups on the surface of silicon powder. When it comes into contact with water, the hydroxyl groups form a strong hydrogen bond network with water molecules, causing adhesion and clumping. Isopropanol can be used to dissolve the clumps. Isopropanol can replace the water molecules bound to the surface of silicon powder, weakening the hydrogen bond strength between particles, thereby causing the clumps to dissolve. After the clumps are dissolved, they can be scraped off with a plastic knife.

[0031] Static electricity can be generated during the silicon material screening process, causing silicon powder to adhere to the surface of the silicon material, or the surface of the silicon material to be statically charged, causing the silicon material to be adsorbed on the surface of the silo and unable to be screened sufficiently. The screening device is equipped with a grounded copper strip to release static electricity periodically.

[0032] In summary, this invention achieves simultaneous material suction and screening, automatically screening particles of different diameters and improving screening efficiency. This invention can be used for screening CCZ granular silicon in the photovoltaic industry, meeting the screening needs of different silicon particle sizes. It can also be adapted to screening silicon materials such as crushed and small pieces in other industries; effectively eliminating screening errors and promoting the improvement of particle screening in the photovoltaic industry. The system has a simple structure, wide application range, and is suitable for promotion in multiple fields. This invention replaces manual screening. This device is a small screening device, simple to manufacture, and replaces manual screening, reducing labor and improving screening efficiency. The device has a dust removal method to reduce dust in the granular silicon after screening; the screening effect is good, achieving a better screen passage rate through sufficient vibration; it is highly adaptable: by changing the screen, the device can adapt to the particle size requirements of various specifications of silicon materials, and screen replacement is simple; it is easy to maintain: the device adopts a modular design, with a simple structure, and each component is easy to disassemble and replace, facilitating maintenance; it is easy to operate: the operation is simple and easy to understand, and screening can be completed through simple operating steps.

[0033] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0034] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to the implementation of the present invention) may be omitted.

[0035] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An automatic material feeding and screening device, characterized in that, The system includes a suction bin (1), a base frame (10), an upper vibrating bin (2), a lower vibrating bin (5), a screen (8), and a material box (11). The material box (11) is installed on the lower surface of the base frame (10), and the upper vibrating bin (2) and the lower vibrating bin (5) are installed on the upper surface of the base frame (11). The upper vibrating bin (2) is installed above the lower vibrating bin (5), the suction bin (1) is installed above the upper vibrating bin (2), and the screen (8) is installed at the bottom of the upper vibrating bin (2) and the lower vibrating bin (5). The upper vibrating bin (2) and the lower vibrating bin (5) are inclined.

2. The automatic feeding and screening device according to claim 1, characterized in that, The suction chamber (1) is provided with a suction pipe interface (1.1) and a vacuum pipe interface (1.2).

3. The automatic feeding and screening device according to claim 1, characterized in that, Both the upper vibrating hopper (2) and the lower vibrating hopper (5) are equipped with discharge ports.

4. The automatic feeding and screening device according to claim 1, characterized in that, The suction bin (1) is equipped with a rotating shaft (1.5) and a rotating plate (1.4). A counterweight (1.3) is provided on one side of the rotating plate (1.4). The rotating plate (1.4) is installed in the suction bin (1) via the rotating shaft (1.5).

5. The automatic feeding and screening device according to claim 1, characterized in that, An elastic component is installed between the lower vibrating hopper (5) and the base frame (10).

6. The automatic feeding and screening device according to claim 4, characterized in that, A support block (1.7) is installed on the inner wall of the suction bin (1), and the side of the rotating plate (1.4) with the counterweight (1.3) is placed on the support block (1.7).

7. The automatic feeding and screening device according to claim 1, characterized in that, Spiral dust collection ports (3) are provided on the side walls of both the upper vibrating hopper (2) and the lower vibrating hopper (5).

8. The automatic feeding and screening device according to claim 1, characterized in that, A vibration motor (7) is installed between the upper vibrating hopper (2) and the lower vibrating hopper (5).

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