Industrial silicon powder particle size detection device
By introducing multi-layer screening screens, vibration and ultrasonic cleaning mechanisms into the industrial silicon powder particle size detection device, combined with a weighing collection and control system, the problems of low efficiency, poor accuracy and clogging in the existing technology are solved, realizing efficient and accurate particle size detection and reducing manual intervention and safety risks.
Patent Information
- Application Number
- CN202521903657.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-04
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-04
AI Technical Summary
Existing vibrating sieving methods for industrial silicon powder particle size detection suffer from problems such as low efficiency, poor data accuracy, easy clogging of the screen, excessive manual intervention, and dust hazards.
The system employs a screening tower with multiple screening screens, a vibration mechanism, an ultrasonic screen cleaning mechanism, and a weighing and collection mechanism, along with a control mechanism, to automatically calculate the screening ratio, reduce manual intervention, prevent clogging, and improve detection accuracy.
It achieves efficient and accurate particle size detection, reduces the waste of manpower, material resources and financial resources, and reduces the harm to operators caused by equipment operation.
Smart Images
Figure CN224682038U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of industrial particle size detection technology, specifically to an industrial silicon powder particle size detection device. Background Technology
[0002] Industrial silicon powder is a general term used in industries such as photovoltaics, semiconductors, refractory materials, metallurgy, and chemicals. It typically refers to an aggregate of silicon particles with a Si content ≥98% and a particle size between 0.1 μm and 1 mm. Industrial silicon powder is generally classified into metallurgical grade, chemical grade, solar energy grade, and electronic grade. Mandatory testing indicators for industrial silicon powder include: Si purity, particle size distribution, metal impurity content, specific surface area, and moisture content. In polysilicon production, industrial silicon powder is mainly used in the cold hydrogenation process to convert the byproduct silicon tetrachloride (SiCl4) into trichlorosilane (SiHCl3), thereby achieving raw material recycling. During the cold hydrogenation reaction, the particle size of the silicon powder is a crucial factor affecting its utilization rate and conversion rate.
[0003] Currently, vibrating sieving is the main method used to detect the particle size of silicon powder. However, the existing equipment used in vibrating sieving has the following problems: 1. Low sieving efficiency; 2. Poor data accuracy; 3. The screen is prone to clogging and difficult to clean; 4. The weighing process requires manual intervention; 5. The sieving process generates a large amount of dust, which is harmful to the health of the testing personnel. This leads to a waste of human, material, and financial resources. Utility Model Content
[0004] This invention addresses the problems of low efficiency and poor data accuracy in existing vibrating sieving methods for particle size detection, as well as the problem of screen blockage after prolonged use, which leads to waste of manpower, material resources, and financial resources. It provides an industrial silicon powder particle size detection device that prevents screen blockage, automatically calculates the screening ratio, reduces the impact of manual intervention on data accuracy, and reduces the harm to operators caused by equipment operation.
[0005] The technical solution adopted in this utility model is:
[0006] An industrial silicon powder particle size detection device, comprising:
[0007] The screening tower is equipped with a silicon powder injection port; the screening tower is internally equipped with several layers of screening screens;
[0008] A vibration mechanism is installed below the screening tower;
[0009] Several weighing and collecting mechanisms are arranged outside the side wall of the screening tower. Each weighing and collecting mechanism has at least a silicon powder outflow trough that communicates with the interior of the screening tower. The other end of the silicon powder outflow trough is connected to a silicon powder collection tank. A weighing sensor is provided at the bottom of the silicon powder collection tank.
[0010] The control mechanism is electrically connected to both the vibration mechanism and the weighing and collecting mechanism.
[0011] The screening tower is equipped with an ultrasonic screen cleaning mechanism on its side wall. The ultrasonic screen cleaning mechanism has at least a plurality of ultrasonic transducers, which abut against the screening screen. The control mechanism is electrically connected to the ultrasonic screen cleaning mechanism.
[0012] Furthermore, the screening tower is detachably equipped with a first top cover adapted to the silicon powder filling port.
[0013] Furthermore, a first exhaust hood is provided on the first top cover, and the first exhaust hood is connected to a dust removal mechanism via a dust removal pipe.
[0014] Furthermore, the dust removal mechanism has at least a miniature vacuum pump; the miniature vacuum pump is provided with an air inlet, an air outlet, and a dust discharge port; the air inlet is connected to the dust removal pipeline.
[0015] Furthermore, the screening tower is detachably equipped with a second top cover adapted to the silicon powder filling port; the second top cover is equipped with a second exhaust hood, which is connected to a nitrogen inlet via a nitrogen pipeline.
[0016] Furthermore, the screening tower is provided with five layers of screening mesh, which are 20 mesh, 60 mesh, 80 mesh, 100 mesh and 120 mesh respectively from the side near the silicon powder injection port to the bottom of the screening tower; and the screening mesh has an inclination angle of 10° to 15°.
[0017] Furthermore, the vibration mechanism also has at least a first vibration base and a second vibration base; the first vibration base and the second vibration base are respectively disposed on both sides below the screening tower; a servo motor and a vibration component are disposed inside the first vibration base and the second vibration base.
[0018] Furthermore, the multiple silicon powder collection tanks of the weighing and collecting mechanisms are connected together by a fixing rod, which is arranged parallel to the axial direction of the screening tower.
[0019] Furthermore, the control mechanism has at least a touch screen PLC controller, which can display the weight of the material on each layer of the screening net in real time and automatically calculate the proportion of the weight of the material on each layer of the screening net.
[0020] Furthermore, an air spring damper is provided between the side of the silicon powder outlet trough facing the outer wall of the screening tower and the outer wall of the screening tower.
[0021] The beneficial effects of this utility model are:
[0022] 1. This utility model uses a screening tower with multiple layers of screening mesh and a vibration mechanism to perform multi-stage screening of industrial silicon powder. It relies on the coordinated action of an ultrasonic screen cleaning mechanism and a weighing and collecting mechanism to prevent industrial silicon powder from clogging the screening mesh. This allows for efficient and accurate collection and weighing of industrial silicon powder by particle size classification. Furthermore, a control mechanism provides unified workflow control for all mechanisms and calculates and outputs test data. This achieves efficient and thorough automatic calculation of screening percentages, reducing the impact of manual intervention on data accuracy and minimizing the harm to operators caused by equipment operation. It solves the problems of low efficiency and poor data accuracy in existing vibrating screening methods for particle size detection, as well as the problem of screen clogging after prolonged use, resulting in a waste of human, material, and financial resources. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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.
[0024] Figure 1 This is a schematic diagram of the detection device according to Embodiment 1 of this utility model;
[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0026] Figure 3 This is a schematic diagram of the detection device according to Embodiment 2 of this utility model.
[0027] Attached reference numerals: 100-screening tower, 110-silica powder filling port, 120-first top cover, 122-second top cover, 130-screening mesh;
[0028] 200 - Ultrasonic screen cleaning mechanism;
[0029] 300-Weighing and collecting mechanism, 310-Silicon powder outflow trough, 320-Silicon powder collection tank, 330-Weighing sensor, 340-Fixing rod;
[0030] 400 - Vibration mechanism, 410 - First vibration base, 412 - First oil inlet, 420 - Second vibration base, 422 - Second oil inlet;
[0031] 500 - Control mechanism;
[0032] 610 - Nitrogen pipeline, 620 - Second exhaust hood, 630 - Nitrogen inlet;
[0033] 710-Dust removal duct, 720-First exhaust hood, 730-Miniature vacuum pump, 731-Air inlet, 732-Air outlet, 733-Ash discharge port. Detailed Implementation
[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 of this utility model.
[0035] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.
[0036] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.
[0037] Example 1
[0038] Currently, the vibrating sieving method is mainly used to detect the particle size of silicon powder. However, this method is inefficient and has poor data accuracy. Furthermore, the sieves tend to become clogged after prolonged use, resulting in a waste of human, material, and financial resources.
[0039] To address the aforementioned problems in the prior art, this embodiment provides an industrial silicon powder particle size detection device for detecting the particle size of industrial silicon powder. This device prevents screen clogging and automatically calculates the screening ratio, reducing the impact of manual intervention on data accuracy and minimizing the hazards to operators during equipment operation. Please refer to... Figures 1-2 The industrial silicon powder particle size detection device mainly includes: a screening tower 100, an ultrasonic screen cleaning mechanism 200, a weighing and collection mechanism 300, a vibration mechanism 400, and a control mechanism 500, etc.
[0040] The sieving tower 100 is used to separate industrial silicon powder into multiple layers according to different particle sizes, thereby enabling the detection of the proportion of different particle sizes in the industrial silicon powder. For example... Figure 1 , Figure 2As shown, the screening tower 100 is roughly cylindrical in shape. The screening tower 100 mainly includes a silicon powder filling port 110 at the top, a first top cover 120, and multiple layers of screening mesh 130 inside. The silicon powder filling port 110 is used to add industrial silicon powder into the screening tower 100 before the industrial silicon powder particle size detection device starts operating. The first top cover 120 is adapted to the silicon powder filling port 110 and is used to close the silicon powder filling port 110 when the industrial silicon powder particle size detection device starts operating, preventing industrial silicon powder from being thrown outwards. The screening mesh 130 is evenly distributed along the axial direction of the screening tower 100, with the aperture decreasing and the mesh size increasing sequentially from the side near the silicon powder filling port 110 towards the bottom receiving plate of the screening tower 100.
[0041] The vibration mechanism 400 provides the main vibration source, enabling the industrial silicon powder in the screening tower 100 to be fully screened and stratified. The vibration mechanism 400 mainly includes a vibration base, which is located below the screening tower 100. A servo motor is installed inside the vibration base, driving the internal vibration components to provide the required vibration.
[0042] Because the multi-layer screening mesh 130 inside the screening tower 100 is prone to clogging during the operation of the vibration mechanism 400, an ultrasonic cleaning mechanism 200 is installed to handle the blockage of the multi-layer screening mesh 130, thereby improving the accuracy of screening and detection and reducing manual cleaning. The ultrasonic cleaning mechanism 200 mainly includes several ultrasonic transducers installed on the side wall of the screening tower 100, which can provide lateral high-frequency vibration to the multi-layer screening mesh 130 inside the screening tower 100, causing the industrial silicon powder clogging the holes to detach.
[0043] Multiple weighing and collecting mechanisms 300 are installed on the outer side wall of the screening tower 100 to collect industrial silicon powder on each layer of screening mesh 130 inside the screening tower 100, and to detect the weight of industrial silicon powder of different particle sizes. The weighing and collecting mechanism 300 mainly includes a silicon powder outlet trough 310, a silicon powder collection tank 320, and a weighing sensor 330. One end of the silicon powder outlet trough 310 is connected to the interior of the screening tower 100 through the discharge port of the screening tower 100 and is located on one side of the upper surface of the screening mesh 130. The discharge port of the screening tower 100 can be opened and closed. The other end of the silicon powder outlet trough 310 is inclined downwards and connected to the silicon powder collection tank 320. Meanwhile, a weighing sensor 330 is installed at the bottom of the silicon powder collection tank 320 to measure the weight of the industrial silicon powder collected on each layer of screening mesh 130 inside the screening tower 100.
[0044] The control mechanism 500 is used to control the operation of each mechanism of the entire industrial silicon powder particle size detection device and to calculate and output detection data. The control mechanism 500 is located below the screening tower 100 and is electrically connected to the ultrasonic screen cleaning mechanism 200, the weighing and collecting mechanism 300, and the vibration mechanism 400.
[0045] One specific working method of this embodiment is as follows:
[0046] First, the first top cover 120 on the screening tower 100 is removed, and silicon powder is added through the silicon powder filling port 110. Then, the first top cover 120 is reinstalled, and the power switch on the control mechanism 500 is turned on to control the vibration mechanism 400 to start vibrating under the drive of the servo motor. After the vibrating screening has been going on for 5 minutes, the power switch on the control mechanism 500 is turned off. Then, the silicon powder on the screening screen 130 is cleaned by the ultrasonic transducer of the ultrasonic cleaning mechanism 200, and the silicon powder discharge port on the side wall of the screening tower 100 is opened. The stratified industrial silicon powder is collected into the silicon powder collection tank 320 through the silicon powder outflow trough 310. After the silicon powder on each layer of screening screen 130 has been collected, the control mechanism 500 controls the weighing sensor 330 to start weighing, records the weight, and automatically calculates the proportion of material on each layer of screen according to the built-in calculation logic.
[0047] In this embodiment, the industrial silicon powder particle size detection device performs multi-stage screening of industrial silicon powder by setting up a screening tower 100 with several layers of screening screens 130 and a vibration mechanism 400. The ultrasonic screen cleaning mechanism 200 and the weighing and collection mechanism 300 work together to prevent industrial silicon powder from clogging the screening screens 130, enabling efficient and accurate collection and weighing of industrial silicon powder by particle size grade. Furthermore, the control mechanism 500 provides unified workflow control for each mechanism and calculates and outputs detection data. This achieves efficient and thorough automatic calculation of screening proportions, reduces the impact of manual intervention on data accuracy, and minimizes the harm to operators caused by equipment operation. It solves the problems of low efficiency and poor data accuracy in existing vibrating screening methods for particle size detection, as well as the problem of screen clogging after prolonged use, resulting in a waste of human, material, and financial resources.
[0048] Furthermore, in this embodiment, the screening tower 100 has five layers of multi-layer screening mesh 130, namely 20 mesh, 60 mesh, 80 mesh, 100 mesh, and 120 mesh, all of which adopt a modular screen frame design. Each layer of screening mesh 130 is independently packaged and connected to the inner wall of the screening tower 100 through a snap-fit structure, thereby enabling quick replacement. In addition, the screening mesh 130 has an inclination angle of 10° to 15° and is equipped with an adjustable support to adapt to different material flow rates. Simultaneously, the screening mesh 130 is made of 316L stainless steel mesh and nylon frame material, which ensures the durability of the screening mesh 130 and prevents wear on the inner wall of the screening tower 100 during installation and removal of the screening mesh 130.
[0049] Furthermore, in this embodiment, the first top cover 120 of the screening tower 100 is detachably connected to the body of the screening tower 100 via fixing bolts at both ends. A first exhaust hood 720 is also provided on the first top cover 120. The first exhaust hood 720 is connected to a dust removal mechanism via a dust removal pipe 710. The dust removal mechanism is used to clean the interior of the screening tower 100 after the industrial silicon powder particle size detection device has finished operating. In this embodiment, the dust removal mechanism is a miniature vacuum pump 730. The miniature vacuum pump 730 is provided with an air inlet 731 connected to the dust removal pipe 710, as well as an air outlet 732 and an ash discharge port 733. The miniature vacuum pump 730 can recycle the filtered silicon powder from the ash discharge port 733, avoiding raw material waste and environmental pollution.
[0050] Furthermore, in the vibration mechanism 400 of this embodiment, the vibration base includes a first vibration base 410 and a second vibration base 420. The first vibration base 410 and the second vibration base 420 are symmetrically arranged on both sides below the screening tower 100, which enables the screening screen 130 inside the screening tower 100 to vibrate more uniformly and regularly, thereby improving screening efficiency. In addition, a first servo motor and a second servo motor are respectively installed in the first vibration base 410 and the second vibration base 420; a first oil inlet 412 for the first servo motor is provided above the first vibration base 410, and a second oil inlet 422 for the second servo motor is provided above the second vibration base 420, for convenient oiling of the first and second servo motors. Furthermore, the servo motors support stepless speed regulation from 0-3000 rpm, thereby adapting to the requirements of various screen mesh sizes.
[0051] Furthermore, in this embodiment, in the ultrasonic screen cleaning mechanism 200, the ultrasonic transducer is disposed on the side wall of the screening tower 100 and abuts against the bottom of each layer of screen. The frequency of the ultrasonic transducer is 28kHz, and a timing pulse is set by the control mechanism 500 to prevent clogging. Moreover, the control mechanism 500 sets the ultrasonic screen cleaning mechanism 200 and the vibration mechanism 400 to not operate simultaneously. When the ultrasonic screen cleaning mechanism 200 cleans the screen, the vibration of the vibration mechanism 400 is paused, thereby avoiding interference with screening accuracy during screen cleaning.
[0052] Furthermore, in this embodiment, the silicon powder collection tank 320 of the weighing and collecting mechanism 300 is made of transparent polycarbonate and has scale markings, which allows the operator to quickly read the values when the control system cannot display them properly; and the bottom of the silicon powder collection tank 320 is magnetically fixed to the weighing sensor 330. In addition, multiple silicon powder collection tanks 320 of multiple weighing and collecting mechanisms 300 are connected to a common fixing rod 340, which is parallel to the axial direction of the screening tower 100, ensuring that the position of the multiple silicon powder collection tanks 320 remains fixed and preventing lateral deviation, thereby improving the stability of the weighing and collecting mechanism 300 and the accuracy of the detection data.
[0053] Furthermore, in this embodiment, the control mechanism 500 has at least a touchscreen PLC controller. The touchscreen PLC controller can display the weight of the material on each layer of the screen (coarse, medium-coarse, medium-fine, fine, and ultrafine grades) in real time and automatically calculate the percentage. The results are displayed in a bar chart or pie chart. The control mechanism 500 can also store historical data and supports exporting it to CSV format via USB. The interlocking logic of the control mechanism 500 also includes automatically stopping vibration, starting weighing, saving data, and providing audible and visual prompts after screening is completed.
[0054] Preferably, in this embodiment, an air spring damper can also be provided on the weighing and collecting mechanism 300 between the side of the silicon powder outflow trough 310 facing the outer wall of the screening tower 100 and the outer wall of the screening tower 100. Each layer of air spring damper also has four sets of air cushion supports, which can actively counteract the vibration transmitted from the vibration mechanism 400 to the weighing and collecting mechanism 300, preventing the weighing and collecting mechanism 300 from being damaged or having its working performance affected by vibration. In one or more other embodiments, a flexible connection can also be provided between the side of the silicon powder outflow trough 310 facing the outer wall of the screening tower 100 and the outer wall of the screening tower 100, thereby isolating vibration interference.
[0055] Example 2
[0056] Based on the above embodiments, a second embodiment is provided below to address the safety risk of explosion caused by high-purity silicon powder.
[0057] Please see Figure 3 The second embodiment also includes a second top cover 122 and a protective mechanism.
[0058] like Figure 1 , Figure 3 As shown, a second exhaust hood 620 is also provided on the second top cover 122. The second exhaust hood 620 is connected to the nitrogen inlet 630 of the protection mechanism via a nitrogen pipe 610. The protection mechanism is used to provide protection by introducing nitrogen gas when the industrial silicon powder particle size detection device is working, thereby reducing the risk of silicon powder explosion. In use, when the industrial silicon powder particle size detection device is working, nitrogen gas is introduced for protection by combining the second top cover 122 with the silicon powder filling port 110; after the industrial silicon powder particle size detection device has finished working, the system switches back to combining the first top cover 120 with the silicon powder filling port 110, and the dust removal mechanism is used to clean the inside of the screening tower 100.
[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An industrial silicon powder particle size detection device, characterized in that, Include: The screening tower (100) is provided with a silica powder filling port (110); the screening tower (100) is provided with several layers of screening screens (130). A vibration mechanism (400) is disposed below the screening tower (100); Several weighing and collecting mechanisms (300) are disposed outside the side wall of the screening tower (100). Each weighing and collecting mechanism (300) has at least one silicon powder outlet trough (310) communicating with the interior of the screening tower (100). The other end of the silicon powder outlet trough (310) is connected to a silicon powder collection tank (320). A weighing sensor (330) is disposed at the bottom of the silicon powder collection tank (320). The control mechanism (500) is electrically connected to both the vibration mechanism (400) and the weighing and collecting mechanism (300); The screening tower (100) is provided with an ultrasonic cleaning mechanism (200) on its side wall. The ultrasonic cleaning mechanism (200) has at least a number of ultrasonic transducers, which abut against the screening screen (130). The control mechanism (500) is electrically connected to the ultrasonic cleaning mechanism (200).
2. The industrial silicon powder particle size detection device as described in claim 1, characterized in that, The screening tower (100) is detachably provided with a first top cover (120) adapted to the silicon powder filling port (110).
3. The industrial silicon powder particle size detection device as described in claim 2, characterized in that, The first top cover (120) is provided with a first exhaust hood (720), which is connected to a dust removal mechanism through a dust removal pipe (710).
4. The industrial silicon powder particle size detection device as described in claim 3, characterized in that, The dust removal mechanism has at least a miniature vacuum pump (730); the miniature vacuum pump (730) is provided with an air inlet (731), an air outlet (732) and a dust discharge port (733); the air inlet (731) is connected to the dust removal pipe (710).
5. The industrial silicon powder particle size detection device according to any one of claims 1-4, characterized in that, The screening tower (100) is detachably provided with a second top cover (122) adapted to the silicon powder filling port (110); the second top cover (122) is provided with a second exhaust hood (620), which is connected to the nitrogen inlet (630) through a nitrogen pipeline (610).
6. The industrial silicon powder particle size detection device as described in claim 1, characterized in that, The screening tower (100) is provided with five layers of screening mesh (130), the screening mesh (130) being 20 mesh, 60 mesh, 80 mesh, 100 mesh and 120 mesh respectively from the side near the silicon powder filling port (110) to the bottom side of the screening tower (100); and the screening mesh (130) having an inclination angle of 10°~15°.
7. The industrial silicon powder particle size detection device as described in claim 1, characterized in that, The vibration mechanism (400) also has at least a first vibration base (410) and a second vibration base (420); the first vibration base (410) and the second vibration base (420) are respectively arranged on both sides below the screening tower (100); the first vibration base (410) and the second vibration base (420) are each provided with a servo motor and a vibration component.
8. The industrial silicon powder particle size detection device as described in claim 1, characterized in that, The plurality of silicon powder collection tanks (320) of the plurality of weighing and collecting mechanisms (300) are connected together by a fixing rod (340), which is arranged parallel to the axial direction of the screening tower (100).
9. The industrial silicon powder particle size detection device as described in claim 1, characterized in that, The control mechanism (500) has at least a touch screen PLC controller, which can display the weight of the material on each layer of the screening screen (130) in real time and automatically calculate the proportion of the weight of the material on each layer of the screening screen (130).
10. The industrial silicon powder particle size detection device as described in claim 1, characterized in that, An air spring damper is provided between the side of the silicon powder outflow trough (310) facing the outer wall of the screening tower (100) and the outer wall of the screening tower (100).