Air seal device applied to graphite furnace
By forming a gas seal on the inner wall of the graphite furnace and controlling the gas flow with inert gas, the problem of volatile deposition is solved, and a safe and efficient cleaning effect is achieved.
Patent Information
- Application Number
- CN202422395085.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-30
AI Technical Summary
During the high-temperature graphitization process of graphite furnaces, volatiles are deposited on the furnace door and the inner wall of the furnace body, making it difficult to clean and there is a risk of spontaneous combustion.
Using an air sealing device, by forming a gas sealing layer on the furnace door and the inner wall of the furnace body, the air flow is controlled with inert gas, which prevents the deposition of volatiles and promotes the extraction of volatiles.
Effectively prevent volatile deposition, reduce cleaning difficulties, reduce safety hazards, and improve safety.
Smart Images
Figure CN223121944U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of graphite furnaces, and particularly to a gas sealing device applied to a graphite furnace. Background Art
[0002] During the high-temperature graphitization process of a graphite furnace, due to the action of high temperature, various substances in the material that are not resistant to high temperature decompose and volatilize, generating floating particles in the product. In a vacuum state, a large amount of volatiles generated will be deposited on the furnace door and the inner wall of the furnace body due to insufficient pumping force of the vacuum system. Especially when graphitizing phosphorus-containing substances, a large amount of white phosphorus will be deposited on the furnace door and the inner part of the furnace body, making it difficult to clean after graphitization. At the same time, due to the low ignition point of white phosphorus, spontaneous combustion will occur, generating a large amount of toxic and harmful smoke. Content of the Utility Model
[0003] (1) Technical Solution
[0004] To solve the above technical problems, the utility model provides a gas sealing device applied to a graphite furnace, which includes a first gas sealing member arranged on the furnace body of the graphite furnace and a second gas sealing member arranged on the furnace door of the graphite furnace. The first gas sealing member includes an annular outer ring, a gas sealing pipe and a first air inlet. The annular outer rings are arranged at both ends of the furnace body. An annular air cavity is formed inside the annular outer ring. A plurality of the gas sealing pipes are annularly and equidistantly distributed on the inner wall of the furnace body. Both ends of the gas sealing pipe are respectively communicated with the annular air cavities of the two annular outer rings. The annular outer ring is provided with the first air inlet communicated with the annular air cavity. The gas sealing pipe is provided with a flat opening. The second gas sealing member includes a first gas sealing ring, a second air inlet, a second gas sealing ring and a third air inlet. The first gas sealing ring is arranged in the middle of the inner wall of the furnace door. An annular first air sealing opening is formed on the outer ring of the first gas sealing ring. The furnace door is provided with the second air inlet communicated with the inside of the first gas sealing ring. The second gas sealing ring is arranged on the outer side of the inner wall of the furnace door. An annular second air sealing opening is formed on the inner side of the second gas sealing ring. The furnace door is provided with the third air inlet communicated with the inside of the second gas sealing ring.
[0005] Preferably, the gas sealing pipe is a strip-shaped pipe.
[0006] Preferably, the flat openings are horizontally formed on both the top and the bottom of the gas sealing pipe.
[0007] Preferably, the number of the first air inlets is two and they are respectively arranged on both sides of the annular outer ring.
[0008] Preferably, the number of the third air inlets is more than two and they are annularly and equidistantly distributed along the second gas sealing ring.
[0009] (2) Beneficial Effects
[0010] The utility model provides an air sealing device applied to a graphite furnace. Compared with the prior art, the utility model has the following beneficial effects: on the furnace door and the inner wall of the graphite furnace, by installing the air sealing device and controlling the air flow size, an air sealing layer can be formed on the inner wall surface to prevent a large number of floating particles generated by high temperature in the furnace from depositing on the inner wall surface; also, due to the micro-injection of the air sealing gas, it is beneficial to the gas exchange inside the furnace body, and it is more helpful for a large number of volatiles generated in the furnace to be extracted from the graphite furnace, playing a very good protective role and avoiding a large amount of deposits on the furnace door and the inner wall of the furnace body, resulting in subsequent cleaning difficulties and potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is the front view when the furnace body and the furnace door of the utility model are connected.
[0012] Figure 2 It is the schematic cross-sectional structure diagram of the furnace body of the utility model.
[0013] Figure 3 It is Figure 2 The enlarged view of part A in
[0014] Figure 4 It is the schematic structure diagram of the utility model.
[0015] Figure 5 It is Figure 4 The enlarged view of part B in
[0016] Figure 6 It is the schematic cross-sectional structure diagram of the furnace door of the utility model.
[0017] Figure 7 It is Figure 6 The enlarged view of part C in
[0018] Figure 8 It is Figure 6 The enlarged view of part D in
[0019] The reference numerals are: 1 - furnace body, 11 - annular outer ring, 111 - annular air cavity, 12 - air sealing pipe, 121 - flat opening, 13 - first air inlet, 2 - furnace door, 21 - first air sealing ring, 211 - first air sealing port, 22 - second air inlet, 23 - second air sealing ring, 231 - second air sealing port, 24 - third air inlet. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The utility model will be further described in conjunction with the drawings and embodiments.
[0021] As Figures 1 to 8As shown in the figure, a gas sealing device applied to a graphite furnace according to the present utility model includes a first gas sealing member provided on the furnace body 1 of the graphite furnace and a second gas sealing member provided on the furnace door 2 of the graphite furnace. The first gas sealing member includes an annular outer ring 11, a gas sealing pipe 12, and a first air inlet 13. The annular outer rings 11 are provided at both ends of the furnace body 1. An annular gas chamber 111 is formed inside the annular outer ring 11. A plurality of the gas sealing pipes 12 are annularly and equidistantly distributed on the inner wall of the furnace body 1. Both ends of the gas sealing pipe 12 are respectively communicated with the annular gas chambers 111 of the two annular outer rings 11. The annular outer ring 11 is provided with the first air inlet 13 communicated with the annular gas chamber 111. A flat opening 121 is formed on the gas sealing pipe 12. The second gas sealing member includes a first gas sealing ring 21, a second air inlet 22, a second gas sealing ring 23, and a third air inlet 24. The first gas sealing ring 21 is provided in the middle of the inner wall of the furnace door 2. A first gas sealing opening 211 in a ring shape is formed on the outer ring of the first gas sealing ring 21. The furnace door 2 is provided with the second air inlet 22 communicated with the inside of the first gas sealing ring 21. The second gas sealing ring 23 is provided on the outer side of the inner wall of the furnace door 2. A second gas sealing opening 231 in a ring shape is formed on the inner side of the second gas sealing ring 23. The furnace door 2 is provided with the third air inlet 24 communicated with the inside of the second gas sealing ring 23.
[0022] The gas sealing pipe 12 is a strip-shaped pipe, and the flat openings 121 are horizontally formed on both the top and the bottom of the gas sealing pipe 12. With such a setting, a gas sealing layer can be formed between every two adjacent gas sealing pipes 12, ensuring the gas sealing effect on the inner wall of the furnace body 1.
[0023] The number of the first air inlets 13 is two and they are respectively provided on both sides of the annular outer ring 11. The number of the third air inlets 24 is more than two and they are annularly and equidistantly distributed along the second gas sealing ring 23. With such a setting, uniform air intake can be realized, ensuring the gas sealing effect on the inner wall of the furnace door 1.
[0024] Inert gas is filled into the annular gas cavity 111 through the first air inlet 13, and the gas rushes out from the flat opening 121 on the gas seal pipe 12 to form a gas seal layer on the inner wall of the furnace body 1. Inert gas is filled into the first gas seal ring 21 and the second gas seal ring 23 through the second air inlet 22 and the third air inlet 24. The gas rushes out from the annular first gas seal opening 211 and the second gas seal opening 231 to form a gas seal layer on the inner wall of the furnace door 2. When the gas rushes out from the annular first gas seal opening 211, it rushes out and diffuses from the middle of the furnace door 2 to the outside. When the gas rushes out from the annular second gas seal opening 231, it rushes out and diffuses from the outside of the furnace door 2 to the middle. Such a setting can enable the inert gas to better fully cover the entire inner wall of the furnace door 2 and ensure the gas seal effect; the gas seal device is installed in a quick-installation manner, and the gas seal pipe fittings can be disassembled and cleaned during cleaning. The gas seal device is filled with inert gases such as high-purity nitrogen and helium. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.
[0025] The above-described embodiments only represent the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed. However, the present invention is not limited to these embodiments. It should be noted that for those of ordinary skill in the art. Without departing from the gist of the present invention, any improvements made fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.
Claims
1. A gas sealing device applied to a graphite furnace, characterized in that It includes a first air seal member provided on the furnace body (1) of the graphite furnace and a second air seal member provided on the furnace door (2) of the graphite furnace. The first air seal member includes an annular outer ring (11), an air seal pipe (12), and a first air inlet (13). The annular outer rings (11) are provided at both ends of the furnace body (1). An annular air cavity (111) is formed inside the annular outer ring (11). A plurality of the air seal pipes (12) are annularly and equidistantly distributed on the inner wall of the furnace body (1). Both ends of the air seal pipe (12) are respectively communicated with the annular air cavities (111) of the two annular outer rings (11). The annular outer ring (11) is provided with the first air inlet (13) communicated with the annular air cavity (111). A flat opening (121) is formed on the air seal pipe (12). The second air seal member includes a first air seal ring (21), a second air inlet (22), a second air seal ring (23), and a third air inlet (24). The first air seal ring (21) is provided in the middle of the inner wall of the furnace door (2). A first air seal opening (211) in a ring shape is formed on the outer circle of the first air seal ring (21). The furnace door (2) is provided with the second air inlet (22) communicated with the inside of the first air seal ring (21). The second air seal ring (23) is provided on the outer side of the inner wall of the furnace door (2). A second air seal opening (231) in a ring shape is formed on the inner side of the second air seal ring (23). The furnace door (2) is provided with the third air inlet (24) communicated with the inside of the second air seal ring (23).
2. The gas sealing device applied to a graphite furnace according to claim 1, wherein The air seal pipe (12) is a strip-shaped pipe.
3. The gas sealing device applied to a graphite furnace according to claim 2, characterized in that, The flat openings (121) are horizontally formed on both the top and bottom of the air seal pipe (12).
4. A gas sealing device applied to a graphite furnace according to claim 1, characterized in that, The number of the first air inlets (13) is two and they are respectively provided on both sides of the annular outer ring (11).
5. The gas sealing device applied to a graphite furnace according to claim 1, characterized in that The number of the third air inlets (24) is more than two and they are annularly and equidistantly distributed along the second air seal ring (23).