Liquid silicon sampling device

Abstract

The utility model relates to a liquid silicon sampling device which comprises a pot body and a bracket which are detachably connected, the pot body is composed of a pot body upper portion and a pot body lower portion, the pot body upper portion and the pot body lower portion are both cylindrical, and the diameter of the pot body upper portion is larger than that of the pot body lower portion. A through circular-truncated-cone-shaped containing cavity is formed in the pot body upper portion and the pot body lower portion, and the diameter of an upper opening of the containing cavity is larger than that of a lower opening of the containing cavity. A plug is plugged in the lower opening of the containing cavity, and the maximum outer diameter of the plug is larger than the diameter of the lower opening of the containing cavity. The sample taking-out device is simple in structure, convenient to use, high in sample taking-out speed and good in practicability.

Description

Technical Field

[0001] The utility model relates to the field of industrial silicon production, in particular to a liquid silicon sampling device. Background Art

[0002] Industrial silicon is produced by electrothermal smelting in a submerged arc furnace. Under high temperature and strong reducing conditions, some oxidized impurities introduced by silicon-containing raw materials and reducing agents will inevitably be reduced and enter the metal phase of the product. It is necessary to take samples of each furnace finished product for testing to analyze the content of major impurities such as Fe, Al, and Ga. The higher the impurity content, the worse the quality of industrial silicon and the lower the price. Generally, Fe impurities are mainly brought in by raw materials or brought in by external iron from the furnace opening to the casting and molding process; while Al and Ga can be removed through the oxidation refining process outside the furnace and the external operation process. By analyzing the content of impurities in each link, the process and operation can be adjusted in time to achieve the purpose of improving the grade rate of industrial silicon products.

[0003] Chinese utility model patent CN201320142578.1 discloses a liquid silicon sampler, including a bracket and a pot body, the pot body has an open liquid silicon accommodating space inside, and the pot body is detachably connected to the bracket; the bracket can further include a bracket body and a handle, one end of the bracket body is connected to the pot body, and the other end of the bracket body is detachably connected to the handle. The utility model can be widely used in sampling operations for analyzing the chemical composition of silicon during industrial silicon production.

[0004] However, the above utility model was found to have the disadvantage of being difficult to demold during use. Since the pot body is made of graphite material, which is relatively brittle, when knocking or knocking to demold after the silicone liquid cools and solidifies, excessive force can easily damage the pot body, while insufficient force can make it difficult to demold, affecting the user experience of on-site staff. Utility Model Content

[0005] The utility model aims to disclose a liquid silicon sampling device to realize rapid demoulding of samples after sampling and make up for the shortcomings of the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A liquid silicon sampling device comprises a pot body and a bracket, wherein the pot body and the bracket are detachably connected; the pot body consists of an upper pot body part and a lower pot body part, both of which are cylindrical, and the diameter of the upper pot body part is larger than the diameter of the lower pot body part; a through truncated cone-shaped accommodating cavity is provided inside the upper pot body part and the lower pot body part, and the upper opening diameter of the accommodating cavity is larger than the lower opening diameter; a plug is provided in the lower opening of the accommodating cavity, and the maximum outer diameter of the plug is larger than the lower opening diameter of the accommodating cavity.

[0008] The bracket comprises a supporting ring and a handle connected to one side of the supporting ring. When in use, the supporting ring is sleeved on the lower part of the pot body and abuts against the bottom surface of the upper part of the pot body.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] The utility model has the advantages of simple structure, convenience in use and fast sample removal speed. During use, the staff only needs to hold the handle and extend the pot body into the casting silicon liquid flow to receive the silicon liquid. After the silicon liquid is full, the pot body is taken out to cool. After cooling, the plug is knocked in the reverse direction to remove the sample from the pot body accommodating cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] In the figure, 1-pot body, 2-bracket, 3-upper part of pot body, 4-lower part of pot body, 5-accommodating cavity, 6-plug, 7-support ring, 8-handle. DETAILED DESCRIPTION

[0013] The utility model is further explained below in conjunction with the accompanying drawings.

[0014] like Figure 1 As shown, a liquid silicon sampling device comprises a pot body 1 and a bracket 2, and the pot body 1 and the bracket 2 are detachably connected; the pot body 1 is composed of a pot body upper part 3 and a pot body lower part 4, and the pot body upper part 3 and the pot body lower part 4 are both cylindrical, and the diameter of the pot body upper part 3 is larger than the diameter of the pot body lower part 4; a through truncated cone-shaped accommodating cavity 5 is opened inside the pot body upper part 3 and the pot body lower part 4, and the upper opening diameter of the accommodating cavity 5 is larger than the lower opening diameter; the lower opening of the accommodating cavity 5 is plugged with a plug 6 adapted thereto, and the maximum outer diameter of the plug 6 is larger than the lower opening diameter of the accommodating cavity 5.

[0015] In the above device structure, the pot body 1 is made of graphite material. The graphite material has a hard texture, a small expansion coefficient, can withstand rapid cooling and heating, is not easy to deform, and has good chemical stability. It begins to soften and tend to a molten state at 3000°C under vacuum, and begins to evaporate and sublimate at 3600°C. When graphite is heated to 2000°C, its strength is doubled compared to room temperature, and the temperature of silicon water is between 1500 and 1800°C, which fully meets the conditions for making sampling tools. In addition, the sampling pot made of graphite can ensure the accuracy of the sample and effectively avoid the problem of an increase in impurity elements in the silicon water due to the high-temperature silicon water ablating the metal pot body.

[0016] The plug 6 is also made of graphite. Since its maximum outer diameter is larger than the lower opening diameter of the accommodating cavity, it can ensure sealing and prevent the silicon liquid from flowing out of the accommodating cavity.

[0017] The function of the bracket 2 is to fix the pot body 1 and facilitate hand-holding. The part that fixes the pot body 1 needs certain high temperature resistance because it is close to the silicon liquid, but the hand-holding part does not need it. Therefore, the preferred specific setting method of the bracket 2 of the utility model is: the bracket 2 includes a support ring 7 and a handle 8 connected to one side of the support ring 7. When in use, the support ring 7 is sleeved on the lower part 4 of the pot body and abuts against the upper part 3 of the pot body. The support ring 7 is made of steel, and the handle 4 can be made of wood to improve the hand-holding feel and reduce the overall weight. The connection between the handle 8 and the support ring 7 can be threaded or pinned, which is not limited here.

[0018] During the actual sampling operation, the pot body 1 is set on the bracket 2. After the high-temperature silicon water is refined in the silicon bag, it is injected into the ingot mold. During the casting process, the sampling personnel hold the sampling device and extend the pot body 1 into the casting liquid flow to receive the silicon liquid. After the pot body is full, the sampling device is removed, the pot body 1 is separated from the bracket 2, and the pot body 1 is placed aside to cool; then according to the sampling requirements, another pot body is installed, and the above is repeated to take the second sample; after the silicon liquid is cooled and solidified in the pot body 1, the pot body is inverted, and the protruding plug 6 is knocked in the opposite direction to take out the sample; finally, the taken sample is sent to the laboratory for component analysis.

Claims

1. A liquid silicon sampling device, characterized in that: The invention comprises a pot body (1) and a bracket (2), wherein the pot body (1) and the bracket (2) are detachably connected; the pot body (1) comprises a pot body upper part (3) and a pot body lower part (4), wherein the pot body upper part (3) and the pot body lower part (4) are both cylindrical, and the diameter of the pot body upper part (3) is larger than the diameter of the pot body lower part (4); a through truncated cone-shaped accommodating cavity (5) is provided inside the pot body upper part (3) and the pot body lower part (4), and the diameter of the upper opening of the accommodating cavity (5) is larger than the diameter of the lower opening; a plug (6) matching the opening is provided inside the lower opening of the accommodating cavity (5), and the maximum outer diameter of the plug (6) is larger than the diameter of the lower opening of the accommodating cavity (5).

2. A liquid silicon sampling device as claimed in claim 1, characterized in that: The bracket (2) comprises a supporting ring (7) and a handle (8) connected to one side of the supporting ring (7). When in use, the supporting ring (7) is sleeved on the lower part (4) of the pot body and abuts against the bottom surface of the upper part (3) of the pot body.

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