Online silicon powder sampling system

Abstract

The utility model provides a silicon powder online sampling system, and relates to the technical field of silicon powder. The silicon powder sampling device comprises a material pipeline for conveying silicon powder, a sampling pipe is communicated with the material pipeline, a sampling bottle is communicated with the sampling pipe, a first valve and a second valve are arranged on the sampling pipe, a pressure release valve is arranged on the sampling pipe between the first valve and the second valve, and an exhaust valve is arranged on the sampling bottle. The automatic sampling device can replace manual work for automatic sampling.

Description

Technical Field

[0001] This utility model relates to the field of silicon powder technology, specifically to an online silicon powder sampling system. Background Technology

[0002] Polysilicon manufacturers primarily use industrial silicon powder, which is one of the key raw materials for polysilicon production. Industrial silicon powder can be transformed into high-purity polysilicon through processes such as smelting and crystal growth, directly affecting the quality and performance of the polysilicon.

[0003] Currently, due to technological requirements, it is necessary to sample silicon powder inside the pipeline in order to test its quality. However, because there is a certain pressure inside the pipeline, personnel are easily injured when sampling. At present, there is a lack of equipment or methods for sampling materials inside pipelines. Utility Model Content

[0004] The purpose of this invention is to develop an online silicon powder sampling system that can replace manual sampling.

[0005] This utility model is achieved through the following technical solution:

[0006] An online silicon powder sampling system, comprising:

[0007] Material pipelines used to transport silicon powder;

[0008] The sampling tube is connected to the material pipeline;

[0009] The sampling bottle is connected to the sampling tube.

[0010] The sampling tube is equipped with a first valve and a second valve, a pressure relief valve is provided on the sampling tube between the first valve and the second valve, and an exhaust valve is provided on the sampling bottle.

[0011] Optionally, the sampling tube is connected to the bottom of the material pipeline at the beginning of the conveying process, and the sampling tube is set vertically.

[0012] Optionally, both the material pipeline and the sampling pipe are ceramic pipelines.

[0013] Optionally, the sampling bottle opening and the sampling tube are connected by a quick-release clamp interface.

[0014] Optionally, both the first valve and the second valve are automatic pneumatic wear-resistant ball valves.

[0015] Optionally, the exhaust valve is located on the top of the sampling bottle on one side of the bottle opening. The exhaust valve includes a cylindrical air column, which is vertically arranged with its two ends located inside and outside the sampling bottle, respectively.

[0016] Optionally, both ends of the gas column are closed structures, and multiple external air holes are provided on the side wall of the gas column outside the sampling bottle, while internal air holes are provided on the side wall of the gas column inside the sampling bottle.

[0017] Optionally, an air block is slidably disposed inside the air column, and a spring connected to the air block is vertically disposed at the top of the air column, with the external air hole located on the sliding trajectory of the air block.

[0018] Optionally, a fixed magnetic block is provided at the bottom of the air column, a sealing film is provided on the top of the fixed magnetic block, the inner air hole is located on the side of the top surface of the sealing film, and a sliding magnetic block that repels the fixed magnetic block is provided inside the air column.

[0019] The beneficial effects of this utility model are:

[0020] This invention can automatically sample materials during material transport via pipelines for testing. Compared with manual testing, it offers higher sampling efficiency and better sampling quality, while reducing safety hazards during the sampling process. The exhaust valve of the sampling bottle automatically closes after venting, preventing dust and impurities from the external environment from entering and contaminating the material inside the sampling bottle. When the exhaust valve is not venting, the air block is supported by the cooperation of a fixed magnetic block and a sliding magnetic block, keeping the spring in its original state and preventing it from being in an extended state for a long time, thus improving the spring's lifespan. Furthermore, the air column at the bottom of the air block is hollow without any other supporting structure, allowing for smoother venting. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a structural diagram of the present utility model;

[0023] Figure 2 This is a structural diagram of the exhaust valve.

[0024] Attached reference numerals: 1. Material pipeline; 2. Sampling tube; 3. First valve; 4. Second valve; 5. Pressure relief valve; 6. Sampling bottle; 7. Exhaust valve; 71. Air column; 72. External air hole; 73. Internal air hole; 74. Spring; 75. Air block; 76. Sliding magnetic block; 77. Fixed magnetic block; 78. Sealing membrane. Detailed Implementation

[0025] 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 invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0026] In the description of this invention, 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown, this utility model discloses an online silicon powder sampling system, including a material pipeline 1, in which silicon powder is pneumatically conveyed. A sampling tube 2 is provided at the bottom of the conveying start end of the material pipeline 1. The sampling tube 2 is vertically arranged and connected to the material pipeline 1. Both the material pipeline 1 and the sampling tube 2 are ceramic pipelines.

[0029] The sampling tube 2 is provided with a first valve 3 and a second valve 4 in sequence in the direction away from the material pipeline 1. Both the first valve 3 and the second valve 4 are automatic pneumatic wear-resistant ball valves. A pressure relief valve 5 is provided on the sampling tube 2 between the first valve 3 and the second valve 4.

[0030] The end of the sampling tube 2 away from the material pipeline 1 is connected to a sampling bottle 6. The sampling bottle 6 has a volume of 7.5L and can hold 10 kg of material. The bottle mouth of the sampling bottle 6 is connected to the sampling tube 2 by a quick-release clamp interface.

[0031] The top of the sampling bottle 6 on one side of the bottle mouth is equipped with an exhaust valve 7. The exhaust valve 7 includes a cylindrical air column 71. The inside of the air column 71 is a cylindrical cavity. Both ends of the air column 71 are closed structures. The air column 71 is vertically set and its two ends are located inside and outside the sampling bottle 6, respectively.

[0032] A spring 74 is vertically installed at the top of the air column 71, and an air block 75 is installed at the bottom of the spring 74. The air block 75 is cylindrical and its size is adapted to the internal cavity of the air column 71. The air block 75 slides in contact with the inner wall of the air column 71 and slides in a seal.

[0033] A fixed magnetic block 77 is provided at the bottom of the air column 71, and a sealing film 78 is provided on the top of the fixed magnetic block 77. The edge of the sealing film 78 is connected to the inner wall of the air column 71. A sliding magnetic block 76 is provided inside the air block 75, which cooperates with the fixed magnetic block 77. The sliding magnetic block 76 and the fixed magnetic block 77 are in a repulsive state, and there is a repulsive force between them.

[0034] An inner air hole 73 is provided on the side wall of the air column 71 on the top side of the sealing membrane 78. The inner air hole 73 is located inside the sampling bottle 6. Multiple outer air holes 72 are provided on the side wall of the air column 71 outside the sampling bottle 6. The multiple outer air holes 72 are located on the sliding trajectory of the air block 75.

[0035] When the internal air pressure of sampling bottle 6 is balanced with the external air pressure, the gas block 75 is located inside the multiple external air holes 72 and blocks them. The repulsive force exerted by the fixed magnetic block 77 on the sliding magnetic block 76 inside the gas block 75 is equivalent to the weight of the gas block 75. The spring 74 is in its original state, neither extending nor shortening. When the air pressure inside sampling bottle 6 increases, the gas block 75 slides upward under the pressure, the spring 74 is compressed, and the gas inside the sampling bottle 6 is discharged through the external air holes 72. When the internal and external air pressures of sampling bottle 6 are balanced, the gas block 75 slides downward, the spring 74 is in its original state, and the gas block 75 blocks the external air holes 72.

[0036] Before feeding material into material pipeline 1, check and confirm that both the first valve 3 and the second valve 4 are closed. Once confirmed, feeding can begin. During tank truck feeding, a signal is transmitted to the controller, which in turn sends a signal to the first valve 3 to open it. After 5 seconds of opening, the first valve 3 automatically closes. After 5 minutes of closure, the first valve 3 automatically opens again, opening for 5 seconds before automatically closing. This process repeats for 5 minutes, allowing material to enter the sampling tube 2 in three stages. The pressure relief valve 5 releases pressure within the sampling tube 2, reducing the pressure inside. Then, the second valve 4 automatically opens, allowing material from the sampling tube 2 to flow into the sampling bottle 6. The bottle is then vented for 1 minute through the exhaust valve 7 until the internal pressure of the sampling bottle 6 is equal to the external pressure. The second valve 4 automatically closes, and the quick-release clamp is opened to remove the sampling bottle 6. After feeding material into material pipeline 1, the first valve 3 and the second valve 4 are opened to release any remaining material, preventing interference with sampling of the next batch of material.

[0037] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. An online silicon powder sampling system, characterized in that, include: Material pipelines used to transport silicon powder; The sampling tube is connected to the material pipeline; The sampling bottle is connected to the sampling tube. The sampling tube is equipped with a first valve and a second valve, a pressure relief valve is provided on the sampling tube between the first valve and the second valve, and an exhaust valve is provided on the sampling bottle.

2. The silicon powder online sampling system according to claim 1, characterized in that, The sampling tube is connected to the bottom of the material pipeline at the beginning of the conveying process, and the sampling tube is set vertically.

3. The silicon powder online sampling system according to claim 1, characterized in that, Both the material pipelines and the sampling pipes are ceramic pipelines.

4. The silicon powder online sampling system according to claim 1, characterized in that, The sampling bottle opening and the sampling tube are connected by a quick-release clamp interface.

5. The silicon powder online sampling system according to claim 1, characterized in that, Both the first valve and the second valve are automatic pneumatic wear-resistant ball valves.

6. The silicon powder online sampling system according to claim 1, characterized in that, The exhaust valve is located on the top of the sampling bottle on one side of the bottle opening. The exhaust valve includes a cylindrical air column, which is vertically arranged with its two ends located inside and outside the sampling bottle, respectively.

7. The silicon powder online sampling system according to claim 6, characterized in that, Both ends of the gas column are closed structures. Multiple external air holes are provided on the side wall of the gas column outside the sampling bottle, and internal air holes are provided on the side wall of the gas column inside the sampling bottle.

8. The silicon powder online sampling system according to claim 7, characterized in that, An air block is slidably disposed inside the air column, and a spring connected to the air block is vertically disposed at the top of the air column. The external air hole is located on the sliding trajectory of the air block.

9. The silicon powder online sampling system according to claim 8, characterized in that, The bottom of the air column is provided with a fixed magnetic block, the top of the fixed magnetic block is provided with a sealing film, the inner air hole is located on the side of the top surface of the sealing film, and the air block is provided with a sliding magnetic block that repels the fixed magnetic block.

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