CN221197031U - Gas replacement device - Google Patents
Gas replacement device Download PDFInfo
- Publication number
- CN221197031U CN221197031U CN202323240845.1U CN202323240845U CN221197031U CN 221197031 U CN221197031 U CN 221197031U CN 202323240845 U CN202323240845 U CN 202323240845U CN 221197031 U CN221197031 U CN 221197031U
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- Prior art keywords
- pipeline
- valve group
- detection pipeline
- gas
- detection
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- 238000001514 detection method Methods 0.000 claims abstract description 91
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 61
- 238000005070 sampling Methods 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to the technical field of gas replacement in pipelines, in particular to a gas replacement device which comprises a detection pipeline, a vacuum valve group and an inflation valve group; the vacuum valve group and the inflation valve group are respectively connected in parallel to the detection pipeline through pipelines, a first pneumatic valve is arranged on a pipeline communicated with the detection pipeline through the vacuum valve group, and a second pneumatic valve is arranged on a pipeline communicated with the detection pipeline through the inflation valve group. The utility model can replace corrosive gas in the detection pipeline, and avoid the corrosive gas from corroding the detection pipeline and the valve in a humid environment when the detection pipeline is emptied and depressurized.
Description
Technical Field
The utility model relates to the technical field of gas replacement in pipelines, in particular to a gas replacement device.
Background
The analysis and detection of electron off-gas, industrial gas, mixed gas, etc. by chromatograph is a common chemical analysis process. Since the sampling valve needs to be removed from the detection pipeline and replaced after each batch of gas is detected, residual pressure in the pipeline is usually required to be emptied to ensure safe disassembly before the sampling valve is disassembled. However, if the detected gas is corrosive gas, when the pressure is released during evacuation, the air humidity is increased due to rapid change of the air pressure at the joint of the detection pipeline and the sampling valve, so that the corrosive gas is easy to corrode the detection pipeline and the valve in a humid environment.
Disclosure of utility model
The technical problems to be solved by the utility model are as follows: provided is a gas replacement device which can replace corrosive gas in a detection pipeline, and can prevent the corrosive gas from corroding the detection pipeline and a valve in a humid environment when the detection pipeline is emptied and depressurized.
In order to solve the technical problems, the utility model adopts the following technical scheme: a gas replacement device comprises a detection pipeline, a vacuum valve group and an inflation valve group; the vacuum valve group and the inflation valve group are respectively connected in parallel to the detection pipeline through pipelines, a first pneumatic valve is arranged on a pipeline communicated with the detection pipeline through the vacuum valve group, and a second pneumatic valve is arranged on a pipeline communicated with the detection pipeline through the inflation valve group.
Further, at least the pipe body of the detection pipeline is provided with an electric tracing band.
Further, the gas displacement device further comprises a heat insulation layer wrapped on the outer wall of the pipeline, and the electric tracing band is located between the pipeline and the heat insulation layer.
Further, the electric tracing band is laid in a mode of being spirally wound on the outer wall of the pipeline.
Further, the operation temperature of the electric tracing band is 40 ℃ to 50 ℃.
Further, a third pneumatic valve is arranged on the detection pipeline.
The utility model has the beneficial effects that: and a vacuum valve group and an inflation valve group which are connected with the detection pipeline in parallel are respectively additionally arranged. When detecting corrosive gas, the bottleneck of gas cylinder is connected with the detection pipeline through the A end of the detection pipeline, and then the vacuum valve group and the inflation valve group are all closed, so that the corrosive gas can be ensured to normally enter corresponding equipment through the detection pipeline for detection. When corrosive gas in the detection pipeline is replaced, closing the bottle mouth of the gas bottle, and opening the first pneumatic valve and closing the second pneumatic valve, so that the vacuum pump can pump the gas in the detection pipeline through the vacuum valve group; by closing the first pneumatic valve and opening the second pneumatic valve, the pump can inject inert gas into the detection pipeline through the inflation valve group, and corrosive gas in the detection pipeline can be replaced after the circulation is repeated for a plurality of times. And further, when the pressure relief is carried out in the emptying process, corrosive gas is prevented from corroding the detection pipeline and the valve in a humid environment. Simultaneously, as the vacuum valve group and the inflation valve group are respectively connected in parallel on the detection pipeline through the pipeline, a vacuum pump for vacuumizing and a pump for injecting inert gas can be always in a working state, and the circulating start and stop of the vacuum pump and the pump machine are avoided.
Drawings
FIG. 1 is a schematic illustration of piping connection of a gas displacement device according to an embodiment of the present utility model;
Description of the reference numerals:
1. detecting a pipeline; 11. a third pneumatic valve;
2. a vacuum valve group; 21. a first pneumatic valve;
3. A gas-filled valve group; 31. and a second pneumatic valve.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
The analysis and detection of electron off-gas, industrial gas, mixed gas, etc. by chromatograph is a common chemical analysis process. Since the sampling valve needs to be removed from the detection pipeline and replaced after each batch of gas is detected, residual pressure in the pipeline is usually required to be emptied to ensure safe disassembly before the sampling valve is disassembled. However, if the detected gas is corrosive gas, when the pressure is released during evacuation, the air humidity is increased due to rapid change of the air pressure at the joint of the detection pipeline and the sampling valve, so that the corrosive gas is easy to corrode the detection pipeline and the valve in a humid environment.
Based on the above, the application provides a gas replacement device, which can solve the problem that corrosive gas corrodes a detection pipeline and a valve in a humid environment when evacuating and decompressing.
Referring to fig. 1, a gas replacement device of the present utility model includes a detection pipe 1, a vacuum valve set 2 and an inflation valve set 3; the vacuum valve group 2 and the inflation valve group 3 are respectively connected in parallel to the detection pipeline 1 through pipelines, a first pneumatic valve 21 is arranged on a pipeline communicated with the detection pipeline 1 through the vacuum valve group 2, and a second pneumatic valve 31 is arranged on a pipeline communicated with the detection pipeline 1 through the inflation valve group 3.
From the above description, the beneficial effects of the utility model are as follows: a vacuum valve group 2 and an inflation valve group 3 which are connected with the detection pipeline 1 in parallel are respectively added. When detecting corrosive gas, the bottleneck of the gas cylinder is connected with the detection pipeline 1 through the A end of the detection pipeline 1, and then the vacuum valve group 2 and the inflation valve group 3 are all closed, so that the corrosive gas can be ensured to normally enter corresponding equipment through the detection pipeline 1 for detection. When corrosive gas in the detection pipeline 1 is replaced, the bottle mouth of the gas bottle is closed, and the first pneumatic valve 21 is opened and the second pneumatic valve 31 is closed, so that the vacuum pump can pump the gas in the detection pipeline 1 through the vacuum valve group 2; by closing the first pneumatic valve 21 and opening the second pneumatic valve 31, the pump can inject inert gas into the detection pipeline 1 through the gas charging valve group 3, and corrosive gas in the detection pipeline 1 can be replaced after the cycle is repeated. And further, the corrosive gas is prevented from corroding the detection pipeline 1 and the valve in a humid environment when the pressure is relieved during evacuation. Simultaneously, as the vacuum valve group 2 and the inflation valve group 3 are respectively connected in parallel on the detection pipeline 1 through pipelines, a vacuum pump for vacuumizing and a pump for injecting inert gas can be always in a working state, and the circulation start and stop of the vacuum pump and the pump are avoided.
In an alternative embodiment, the time interval between alternately opening and closing the first pneumatic valve 21 and the second pneumatic valve 31 is five seconds, so that the cycle is that the first pneumatic valve 21 and the second pneumatic valve 31 are respectively opened three hundred times, thereby ensuring the replacement degree of the corrosive gas in the detection pipeline 1.
Further, at least the pipe body of the detection pipe 1 is provided with an electric tracing band (not shown in the figure). Wherein the operation temperature of the electric tracing band is 40-50 ℃. The preferred operating temperature of the electric tracing band is 40 ℃, 43 ℃, 45 ℃, 48 ℃, 50 ℃, and the most preferred operating temperature of the electric tracing band is 45 ℃.
As is apparent from the above description, since the gas is generally stored in the gas cylinder in a liquefied state after being pressurized, when the liquefied gas is released from the gas cylinder into the detection pipe 1, in order to quickly gasify the liquefied gas in the detection pipe 1 and further ensure the accuracy of data of the detection apparatus, the detection pipe 1 is heated by the electric tracing band, which is helpful for the gasification of the liquefied gas in the detection pipe 1.
In an alternative embodiment, a pressure reducer (not shown in the figure) is added to the detection pipeline 1, the pressure reducer is used for reducing the high-pressure gas released by the gas cylinder into low-pressure gas, and the pressure and the flow of the gas output from the pressure reducer are kept stable, so that the accuracy of data of the detection equipment is ensured.
Further, the gas displacement device further comprises a heat insulation layer (not shown in the figure) wrapped on the outer wall of the pipeline, and the electric tracing band is located between the pipeline and the heat insulation layer.
As can be seen from the above description, the heat insulating layer is used to reduce the heat generated by the operation of the electric tracing band from being transferred to the outside.
Further, the electric tracing band is laid in a mode of being spirally wound on the outer wall of the pipeline.
From the above description, it is understood that the spirally wound electric tracing band can increase the heating area of the detection pipe 1, contributing to vaporization of the liquefied gas in the detection pipe 1.
Further, a third pneumatic valve 11 is provided on the detection pipe 1.
As is apparent from the above description, the flow rate of the gas in the detection pipe 1 can be controlled by the third air-operated valve 11.
Example 1
Referring to fig. 1, a gas displacement device comprises a detection pipeline 1, a vacuum valve group 2 and an inflation valve group 3; the vacuum valve group 2 and the inflation valve group 3 are respectively connected in parallel to the detection pipeline 1 through pipelines, a first pneumatic valve 21 is arranged on a pipeline communicated with the detection pipeline 1 through the vacuum valve group 2, and a second pneumatic valve 31 is arranged on a pipeline communicated with the detection pipeline 1 through the inflation valve group 3. At least the pipe body of the detection pipe 1 is spirally wound with an electric tracing band (not shown in the figure). The operation temperature of the electric tracing band is 40 ℃. An insulating layer (not shown in the figure) on the outer wall of the detection pipeline 1, and the electric tracing band is positioned between the pipeline and the insulating layer. The detection pipeline 1 is provided with a third pneumatic valve 11.
Example two
Referring to fig. 1, a gas displacement device comprises a detection pipeline 1, a vacuum valve group 2 and an inflation valve group 3; the vacuum valve group 2 and the inflation valve group 3 are respectively connected in parallel to the detection pipeline 1 through pipelines, a first pneumatic valve 21 is arranged on a pipeline communicated with the detection pipeline 1 through the vacuum valve group 2, and a second pneumatic valve 31 is arranged on a pipeline communicated with the detection pipeline 1 through the inflation valve group 3. At least the pipe body of the detection pipe 1 is spirally wound with an electric tracing band (not shown in the figure). The operation temperature of the electric tracing band is 45 ℃. An insulating layer (not shown in the figure) on the outer wall of the detection pipeline 1, and the electric tracing band is positioned between the pipeline and the insulating layer. The detection pipeline 1 is provided with a third pneumatic valve 11.
Example III
Referring to fig. 1, a gas displacement device comprises a detection pipeline 1, a vacuum valve group 2 and an inflation valve group 3; the vacuum valve group 2 and the inflation valve group 3 are respectively connected in parallel to the detection pipeline 1 through pipelines, a first pneumatic valve 21 is arranged on a pipeline communicated with the detection pipeline 1 through the vacuum valve group 2, and a second pneumatic valve 31 is arranged on a pipeline communicated with the detection pipeline 1 through the inflation valve group 3. At least the pipe body of the detection pipe 1 is spirally wound with an electric tracing band (not shown in the figure). The operation temperature of the electric tracing band is 50 ℃. An insulating layer (not shown in the figure) on the outer wall of the detection pipeline 1, and the electric tracing band is positioned between the pipeline and the insulating layer. The detection pipeline 1 is provided with a third pneumatic valve 11.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.
Claims (6)
1. A gas displacement device, characterized by: the device comprises a detection pipeline, a vacuum valve group and an inflation valve group; the vacuum valve group and the inflation valve group are respectively connected in parallel to the detection pipeline through pipelines, a first pneumatic valve is arranged on a pipeline communicated with the detection pipeline through the vacuum valve group, and a second pneumatic valve is arranged on a pipeline communicated with the detection pipeline through the inflation valve group.
2. The gas displacement apparatus of claim 1, wherein: at least the pipe body of the detection pipeline is coated with an electric tracing band.
3. The gas displacement apparatus of claim 2, wherein: the electric tracing band is positioned between the pipeline and the heat insulation layer.
4. The gas displacement apparatus of claim 2, wherein: the electric tracing band is laid in a mode of being spirally coiled on the outer wall of the pipeline.
5. The gas displacement apparatus of claim 2, wherein: the operation temperature of the electric tracing band is 40-50 ℃.
6. The gas displacement apparatus of claim 1, wherein: and a third pneumatic valve is arranged on the detection pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323240845.1U CN221197031U (en) | 2023-11-28 | 2023-11-28 | Gas replacement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323240845.1U CN221197031U (en) | 2023-11-28 | 2023-11-28 | Gas replacement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221197031U true CN221197031U (en) | 2024-06-21 |
Family
ID=91518419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323240845.1U Active CN221197031U (en) | 2023-11-28 | 2023-11-28 | Gas replacement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221197031U (en) |
-
2023
- 2023-11-28 CN CN202323240845.1U patent/CN221197031U/en active Active
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