CN115112440A - Gas sampling device - Google Patents
Gas sampling device Download PDFInfo
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- CN115112440A CN115112440A CN202110293769.7A CN202110293769A CN115112440A CN 115112440 A CN115112440 A CN 115112440A CN 202110293769 A CN202110293769 A CN 202110293769A CN 115112440 A CN115112440 A CN 115112440A
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- gas
- gas sampling
- sampling
- pipe
- sampling pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2226—Sampling from a closed space, e.g. food package, head space
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2226—Sampling from a closed space, e.g. food package, head space
- G01N2001/2238—Sampling from a closed space, e.g. food package, head space the gas being compressed or pressurized
Abstract
The application relates to the technical field of gas sampling devices, in particular to a gas sampling device. The application provides a gas sampling device, gas sampling device include gas sampling pipe, connect in evacuating device on the gas sampling pipe and with the parallelly connected granule sampling pipe of gas sampling pipe will gas sampling pipe evacuating device and the internal surface of granule sampling pipe all is through passivation treatment for gaseous impurity is not adsorbed so that can effective analysis, sets up evacuating device simultaneously and is convenient for realize the evacuation to gas sampling pipe and granule sampling pipe, further avoids the sampling not disturbed by original gaseous impurity in the pipeline. Simultaneously gas sampling device in this application includes parallelly connected gas sampling pipe and granule sampling pipe, can be convenient for choose for use gas sampling pipe or granule sampling pipe to carry out gas sampling or granule sampling according to user's demand.
Description
Technical Field
The application relates to the technical field of gas sampling devices, in particular to a gas sampling device.
Background
In recent years, the global regulation and transformation trend of fossil energy structures is increasingly remarkable, and the development and application of new energy technologies attract extensive attention. Hydrogen energy can be efficiently converted into other forms of energy, the hydrogen source is rich, and the combustion product is only water, so that the hydrogen energy is considered as the clean energy with the most development potential. One of the current major ways of utilizing hydrogen energy is in the transportation field, i.e., hydrogen fuel cell vehicles. As a terminal of hydrogen consumption, fuel cell vehicles are sensitive to impurities in the supplied hydrogen, toxic gases can reduce the life of the hydrogen fuel cell, and solid particulate matter impurities can clog hydrogen storage cylinder valves or damage valve seats. The quality of hydrogen injected by the hydrogenation machine directly determines the working performance of the fuel cell for the vehicle. An important link before the off-site analysis of the quality of the hydrogen of the hydrogenation machine is sampling, and a hydrogen sample is obtained from a 35MPa/70MPa hydrogenation gun of the hydrogenation machine safely without introducing secondary pollution. The sampling device is required to be matched or connected with a hydrogenation machine at 35MPa/70MPa, namely, the sampling device of the hydrogenation machine is required to reduce pollution from high pressure to low pressure, from large flow to small flow and from a hydrogenation gun to a sampling bottle.
Disclosure of Invention
In view of the above, an object of the embodiments of the present application is to provide a gas sampling apparatus, which can effectively solve the above technical problems.
In a first aspect, the embodiments of the present application provide a gas sampling apparatus, which includes a gas sampling pipe, a vacuum pumping device connected to the gas sampling pipe, and a particle sampling pipe connected in parallel to the gas sampling pipe; wherein the inner surfaces of the gas sampling pipe, the vacuumizing device and the particle sampling pipe are passivated.
In an alternative embodiment according to the first aspect, the gas sampling device further comprises a gas receiving nozzle, and the gas receiving nozzle is arranged at the end of the gas inlet of the gas sampling pipe. It should be noted that, in this embodiment, the air receiving nozzle is provided to facilitate the direct connection with the gas filling machine for sampling, so as to facilitate the gas sampling.
In an alternative embodiment according to the first aspect, the gas sampling apparatus further comprises an input shut-off valve for opening or closing the flow of gas into the gas sampling pipe, the input shut-off valve being provided on the gas sampling pipe. In this embodiment, an input stop valve is provided, which can be used to open or close the gas flowing into the gas sampling pipe, so as to control the gas flowing in at the gas receiving nozzle.
In an alternative embodiment according to the first aspect, the gas inlet of the particle sampling tube is connected to the gas sampling tube between the gas receiving nozzle and the input shutoff valve. It should be noted that, in this embodiment, the air inlet of granule sampling pipe connect in on the gas sampling pipe, and be located receive the air cock with between the input stop valve, and then realize parallelly connected, after the air nozzle inserts gaseous filling machine, the input stop valve can be used to control whether gaseous flows into gas sampling pipe, but uncontrollable gas flows into granule sampling pipe also realizes that gas sampling and granule sampling go on respectively, and can not mutual interference, more can not influence each other.
In an alternative embodiment according to the first aspect, the gas sampling assembly further comprises a pressure relief valve disposed on the gas sampling tube. It should be noted that, in this embodiment, a pressure reducing valve is provided, and the pressure reducing valve is provided on the gas sampling pipe, and the pressure reducing valve is provided to reduce the pressure in the gas sampling pipe by adjusting the pressure reducing valve when sampling is nearly completed, so as to facilitate smooth and safe removal of the sampling storage device.
In an alternative embodiment according to the first aspect, the gas sampling assembly further comprises a safety valve disposed on the gas sampling tube. It should be noted that, in this embodiment, a safety valve is provided, so that when the pressure in the gas sampling pipe exceeds a safety value, the safety valve can be opened to release the pressure, and the safety of the gas sampling pipe is further ensured.
In an alternative embodiment according to the first aspect, the evacuation device is connected to the gas sampling pipe by an evacuation pipe, the evacuation pipe being connected between the pressure relief valve and the safety valve. In this embodiment, the vacuum tube is connected between the pressure reducing valve and the safety valve to facilitate the purging operation and the vacuum operation.
In an alternative embodiment according to the first aspect, the gas sampling apparatus comprises a gas sampling bottle connected to the end of the gas outlet of the gas sampling tube. It should be noted that, in this embodiment, the gas sampling device includes the gas sampling bottle, the gas sampling bottle connect in the tip of the gas vent of gas sampling pipe sets up the sampling bottle is convenient for collect the gas sample, and then realizes directly gathering the sample to carry out off-site gas impurity analysis and detection.
In an optional embodiment according to the first aspect, the gas sampling apparatus further comprises a particle purge valve and a particle blowing tool, and the particle purge valve and the particle blowing tool are sequentially connected to the particle sampling pipe along the gas inlet direction. It should be noted that, in this embodiment, the particle purge valve is provided to facilitate control of the inflow or the cutoff of the substance to be collected. The particle blowing-off tool is used for collecting solid particle impurities in the gas to be detected, and is convenient for analyzing and detecting the impurities in the gas.
In an optional embodiment according to the first aspect, the gas sampling apparatus further comprises an exhaust gas collecting device connected to an end of the particle sampling pipe, and the exhaust gas collecting device is disposed on a side of the particle blowing tool away from the particle purging valve. It should be noted that, in this embodiment, set up tail gas collection device is convenient for collect the gas after filtering, avoids the gas after the filtration directly to get rid of in the atmosphere and causes environmental pollution or take place dangerous gas leakage accident.
The application provides a pair of gas sampling device compares with prior art, possesses following beneficial effect at least:
the application provides a gas sampling device, gas sampling device include gas sampling pipe, connect in evacuating device on the gas sampling pipe and with the parallelly connected granule sampling pipe of gas sampling pipe will gas sampling pipe evacuating device and the internal surface of granule sampling pipe all is through passivation treatment for gaseous impurity is not adsorbed so that can effective analysis, sets up evacuating device simultaneously and is convenient for realize the evacuation to gas sampling pipe and granule sampling pipe, further avoids the sampling not disturbed by original gaseous impurity in the pipeline. Simultaneously gas sampling device in this application includes parallelly connected gas sampling pipe and granule sampling pipe, can be convenient for choose for use gas sampling pipe or granule sampling pipe to carry out gas sampling or granule sampling according to user's demand.
Drawings
The present application will be described in more detail below on the basis of embodiments and with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the overall structure of a gas sampling assembly according to an embodiment of the present application;
FIG. 2 is a diagram showing the relationship among the components of a gas sampling assembly system according to an embodiment of the present application.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Reference numerals:
10-a gas sampling device; 11-a gas sampling tube; 111-air receiving nozzle; 112-input cut-off valve; 113-a pressure relief valve; 114-a safety valve; 115-a sampling valve; 116-a gas sampling bottle; 13-a vacuum-pumping device; 131-a vacuum master valve; 133-evacuation tube; 15-a particle sampling tube; 151-particle purge valve; 153-particle blowing tooling; 155-tail gas collecting device.
Detailed Description
The present application is further described below in conjunction with the detailed description. It should be understood that these specific embodiments are merely illustrative of the present application and are not intended to limit the scope of the present application.
For the sake of brevity, only some numerical ranges are specifically disclosed herein. However, any lower limit may be combined with any upper limit to form ranges not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and similarly any upper limit may be combined with any other upper limit to form a range not explicitly recited. Furthermore, each separately disclosed point or individual value may itself, as a lower or upper limit, be combined with any other point or individual value or with other lower or upper limits to form ranges not explicitly recited.
In the description herein, it is to be noted that, unless otherwise specified, "above" and "below" are inclusive and "one or more" mean "several" two or more.
Unless otherwise indicated, terms used in the present application have well-known meanings that are commonly understood by those skilled in the art. Unless otherwise indicated, the numerical values of the parameters mentioned in the present application can be measured by various measurement methods commonly used in the art (for example, the test can be performed according to the methods given in the examples of the present application).
Referring to fig. 1 in combination with fig. 2, a gas sampling apparatus 10 is provided in the present embodiment, where the gas sampling apparatus 10 includes a gas sampling pipe 11, a vacuum extractor 13 connected to the gas sampling pipe 11, and a particle sampling pipe 15 connected in parallel with the gas sampling pipe 11; wherein the inner surfaces of the gas sampling pipe 11, the vacuum extractor 13 and the particle sampling pipe 15 are passivated.
The application provides a gas sampling device 10, gas sampling device 10 include gas sampling pipe 11, connect in evacuating device 13 on the gas sampling pipe 11 and with the parallelly connected granule sampling pipe 15 of gas sampling pipe 11 will gas sampling pipe 11 evacuating device 13 and the internal surface of granule sampling pipe 15 all passes through passivation treating for gas impurity is not adsorbed so that can the effective analysis, sets up evacuating device 13 simultaneously and is convenient for realize the evacuation to gas sampling pipe 11 and granule sampling pipe 15, further avoids the sampling not disturbed by original gas impurity in the pipeline. Meanwhile, the gas sampling device 10 comprises the gas sampling pipe 11 and the particle sampling pipe 15 which are connected in parallel, so that the gas sampling pipe 11 or the particle sampling pipe 15 can be conveniently selected for gas sampling or particle sampling according to the requirements of users.
It should be further noted that the gas sampling device 10 provided by the present application can be applied to a 35MPa/70MPa hydrogenation machine for directly sampling hydrogen. It can be understood that the other sampling devices provided by the present application are not limited to the two types of hydrogenation machines of 35MPa/70MPa, and can be applied to hydrogenation machines under other pressures according to the requirements of users. It should be further noted that the sampling device provided by the present application is not limited to sampling hydrogen gas, and may also be used for sampling other gases according to the needs of users.
In an alternative exemplary embodiment, the gas sampling apparatus 10 further includes a gas receiving nozzle 111, and the gas receiving nozzle 111 is disposed at an end of the gas inlet of the gas sampling pipe 11. It should be noted that, in this embodiment, the air receiving nozzle 111 is provided to facilitate direct connection with the gas filling machine for sampling, so as to facilitate gas sampling.
In an alternative exemplary embodiment, the gas sampling assembly 10 further comprises an input shutoff valve 112 for opening or closing the flow of gas into the gas sampling tube 11, the input shutoff valve 112 being disposed on the gas sampling tube 11. It should be noted that, in this embodiment, an input stop valve 112 is provided, which can be used to open or close the gas flowing into the gas sampling pipe 11, so as to control the gas flowing in the gas receiving nozzle 111.
In an alternative exemplary embodiment, the gas inlet of the particle sampling pipe 15 is connected to the gas sampling pipe 11 between the gas receiving nozzle 111 and the input shutoff valve 112. It should be noted that, in this embodiment, an air inlet of the particle sampling pipe 15 is connected to the gas sampling pipe 11, and is located between the air receiving nozzle 111 and the input stop valve 112, so as to implement parallel connection, after the air nozzle is connected to the gas filling machine, the input stop valve 112 may be used to control whether gas flows into the gas sampling pipe 11, but cannot control gas to flow into the particle sampling pipe 15, that is, gas sampling and particle sampling are performed respectively, and mutual interference and mutual influence are not caused.
In an alternative exemplary embodiment, the gas sampling assembly 10 further comprises a pressure relief valve 113, the pressure relief valve 113 being disposed on the gas sampling tube 11. In addition, in this embodiment, a pressure reducing valve 113 is provided, and the pressure reducing valve 113 is provided on the gas sampling pipe 11, so that the pressure in the gas sampling pipe 11 can be reduced by adjusting the pressure reducing valve 113 near the end of sampling, and the sampling container can be conveniently and safely removed.
In an alternative exemplary embodiment, the gas sampling assembly 10 further includes a relief valve 114, the relief valve 114 being disposed on the gas sampling tube 11. It should be noted that, in this embodiment, the safety valve 114 is provided, so that when the pressure in the gas sampling pipe 11 exceeds a safety value, the safety valve 114 can be opened to release the pressure, thereby ensuring the safety of the gas sampling pipe 11.
Specifically, in the present application, the safety value of the safety valve 114 is set to 12.5MPa, and when the pressure in the gas sampling pipe 11 exceeds 12.5MPa, the safety valve 114 is automatically opened to release the pressure, thereby ensuring the safety of the gas sampling pipe 11.
In an alternative exemplary embodiment, the vacuum pumping device 13 is connected to the gas sampling pipe 11 through a vacuum pumping pipe 133, and the vacuum pumping pipe 133 is connected between the pressure reducing valve 113 and the safety valve 114. In this embodiment, the evacuation pipe 133 is connected between the pressure reducing valve 113 and the safety valve 114 to facilitate the purging operation and the evacuation operation.
Specifically, in this embodiment, the vacuum pumping device 13 further includes a vacuum gauge and a vacuum pump (not shown in the figure), and the vacuum gauge and the vacuum pump are both disposed on the vacuum pumping pipe 133. It should be noted that the vacuum gauge is arranged to measure the vacuum degree, so as to ensure that the vacuum state is maintained in the pipeline during the vacuum pumping process, and avoid the incomplete vacuum pumping. It should be further noted that the vacuum pump is provided, and the vacuum pump is a device or apparatus that uses mechanical, physical, chemical or physicochemical methods to pump down the pumped container to obtain a vacuum. Set up the vacuum pump in this application for improve in the pipeline, produce and maintain vacuum state, and then avoid gathering gaseous impurity in the pipeline and disturb the collection, and then influence analysis and detection.
Specifically, in this embodiment, the vacuum pumping device 13 further includes a vacuum pumping main valve 131, and the vacuum pumping main valve is disposed on the vacuum pumping pipe 133 and is used for controlling the start or the end of the vacuum pumping process.
In an alternative exemplary embodiment, the gas sampling assembly 10 includes a gas sampling bottle 116, the gas sampling bottle 116 being connected to the end of the gas outlet of the gas sampling tube 11. It should be noted that, in this embodiment, the gas sampling apparatus 10 includes a gas sampling bottle 116, the gas sampling bottle 116 is connected to the end of the exhaust port of the gas sampling pipe 11, and the sampling bottle is configured to facilitate collecting the gas sample, so as to realize direct sampling, so as to perform off-site gas impurity analysis and detection.
Specifically, in this embodiment, the gas sampling apparatus 10 further includes a sampling valve 115, and the sampling valve 115 is disposed at a front end of the gas sampling bottle 116 for controlling whether the gas flows into the gas sampling bottle.
Specifically, in this embodiment, the gas sampling bottle 116 is a gas sampling bottle subjected to passivation treatment, so as to reduce gas impurities in the collected gas, so that impurities specified in GB/T37244 fuel hydrogen for proton exchange membrane fuel cell (pem fuel cell) are not adsorbed, thereby solving the problem that in the prior art, the sample impurities are adsorbed by a sampling device, which results in that the sample impurities cannot be effectively analyzed.
Specifically, in this embodiment, the gas sampling apparatus 10 further includes a pressure sensor (not shown in the figure), which is disposed at the front end of the gas sampling bottle and is used for measuring the gas pressure in the gas sampling bottle, so as to ensure that the pressure of the gas sampling bottle is kept within a safe gas pressure range.
Specifically, in this embodiment, the gas sampling apparatus 10 further includes a system pressure relief valve and a pressure relief pipe (not shown in the figure), and the pressure relief pipe is connected in parallel with the gas sampling pipe 11; it needs to explain, set up system's relief valve and pressure release pipe, be convenient for when the sampling finishes the back, earlier through pressure release pipe and after system's relief valve lets out the pressure in the pipeline, take off the sampling bottle again to guarantee the security performance that the sampling bottle was taken off.
In an alternative exemplary embodiment, the gas sampling apparatus 10 further includes a particle purge valve 151 and a particle purge tool 153, and the particle purge valve 151 and the particle purge tool 153 are sequentially connected to the particle sampling pipe 15 along the gas inlet direction. It should be noted that, in this embodiment, the particle purge valve 151 is provided to facilitate control of the inflow or the shutoff of the substance to be collected. The particle blowing-off tool 153 is arranged for collecting solid particle impurities in the detected gas, so that the impurities in the gas can be analyzed and detected conveniently.
Specifically, in this embodiment, be provided with the filter layer in the granule blowdown frock 153, the filter layer is arranged in filtering the impurity in the gas and collects, when carrying out test analysis, is convenient for carry out analysis and detection with the particulate matter that collects on the filter layer.
In an alternative exemplary embodiment, the gas sampling apparatus 10 further includes an off-gas collecting device 155 connected to an end of the particle sampling pipe 15, and the off-gas collecting device 155 is disposed on a side of the particle blowing tool 153 away from the particle purging valve 151. It should be noted that, in this embodiment, the tail gas collecting device 155 is provided to facilitate collecting the filtered gas, so as to avoid environmental pollution or dangerous gas leakage accidents caused by directly exhausting the filtered gas from the atmosphere.
In the implementation process of the gas sampling device 10 provided by the application, taking a 35MPa/70MPa hydrogenation machine as an example, the implementation process is as follows: the gas sampling device performs pipeline purging and vacuumizing of the whole pipeline system before normal sampling. Firstly, loading a passivated gas sampling bottle, after the gas sampling bottle is installed, opening the input stop valve 112 and the pressure reducing valve 113, closing the vacuumizing main valve 131, purging a hydrogen medium, then opening the vacuumizing main valve 131, closing the input stop valve 112 and the sampling valve 115, vacuumizing, and removing the influence of impurities in a pipeline system on subsequent analysis. Then, sampling is carried out, and the sampling process is as follows: firstly, sampling gas impurities, closing the particle purge valve 151, opening the input stop valve 112 and the sampling valve 115, slowly adjusting the pressure reducing valve 113, closing the input stop valve 112 and the sampling valve 115 when the pressure of the sampling bottle reaches 10MPa, and taking down the gas sampling bottle. Secondly, sampling of gas particulate matter impurities is carried out, the input stop valve 112 is closed, the sampling valve is closed, the particle purging valve 151 is opened, hydrogen medium flows through the particulate matter blowing tool, and tail gas is collected by the tail gas collecting device 155. The whole system is provided with a safe discharge pipeline, when overpressure occurs in the sampling process, the discharge valve can be opened emergently, and the pressure is discharged by the emergency discharge pipeline.
The application provides a gaseous sampling device 10, gaseous sampling bottle and collection system are separable, installs the sampling bottle again when the sample, solid particulate matter frock is detachable. Not only improves the portability of the device, but also is convenient for sampling. Meanwhile, the gas sampling device 10 provided by the application can realize direct sampling from a 35MPa hydrogenation machine and a 70MPa hydrogenation machine, and the samples have more representative significance.
To further illustrate the technical effects of the gas sampling apparatus 10 provided in the present application, the following two embodiments are described:
example 1
A certain currently operated hydrogenation station in China is configured to be a 35MPa single-gun hydrogenation machine. The main parameters are as follows: the hydrogenation station is provided with 3 hydrogen storage tanks, and the storage capacity is 1000 kg; the rated working pressure is 35.0 MPa; the quality of the hydrogen station can meet the requirement of a fuel cell and accords with SAEJ 2719. The gas sampling device 10 provided by the application is used for collecting a hydrogen sample filled by the hydrogenation machine, analyzing the quality of the hydrogen sample and verifying the quality of the sampling device. Samples collected by laboratory analysis were analyzed to obtain the following hydrogen qualities, as shown in table 1.
TABLE 1 test results
From the data in table 1, several typical impurity analysis results meet the standard, which indicates that the sampling device does not introduce secondary pollution (no more impurities are mixed in the sample), and the whole operation process is scientific and ordered.
Example 2
A certain currently operated 35MPa \70MPa hydrogenation station in China is provided with a 35MPa hydrogenation machine and a 70MPa hydrogenation machine. The main parameters are as follows: the hydrogenation station is provided with 3 hydrogen storage tanks, and the storage capacity is 800 kg; rated working pressure is 35.0MPa and 70 MPa; filling pressure range: 0.5MPa to 20 MPa; the gas sampling device 10 provided by the present application is used to collect the hydrogen gas injected by the 70MPa hydrogenation apparatus, and then the hydrogen quality is analyzed in a laboratory, and the following hydrogen quality data are obtained as shown in table 2.
TABLE 2 test results
From the data in table 2, several typical impurity analysis results satisfy the standard, which indicates that the sampling and analysis procedures do not introduce secondary pollution (the sample does not contain more impurities).
While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.
Claims (10)
1. The gas sampling device is characterized by comprising a gas sampling pipe, a vacuumizing device connected to the gas sampling pipe and a particle sampling pipe connected with the gas sampling pipe in parallel;
wherein the inner surfaces of the gas sampling pipe, the vacuumizing device and the particle sampling pipe are passivated.
2. The gas sampling device of claim 1, further comprising a gas receiving nozzle disposed at an end of the gas inlet of the gas sampling tube.
3. The gas sampling apparatus of claim 2, further comprising an input shutoff valve for opening or closing the flow of gas into the gas sampling tube, the input shutoff valve being disposed on the gas sampling tube.
4. The gas sampling apparatus of claim 3, wherein the gas inlet of the particle sampling tube is connected to the gas sampling tube between the gas receiving nozzle and the input shutoff valve.
5. The gas sampling assembly of any one of claims 1-4, further comprising a pressure relief valve disposed on the gas sampling tube.
6. The gas sampling assembly of claim 5, further comprising a safety valve disposed on the gas sampling tube.
7. The gas sampling device of claim 6, wherein the evacuation device is connected to the gas sampling tube by an evacuation tube connected between the pressure relief valve and the safety valve.
8. The gas sampling device according to any one of claims 1 to 4, wherein the gas sampling device comprises a gas sampling bottle connected to an end of a gas outlet of the gas sampling tube.
9. The gas sampling device according to any one of claims 1 to 4, further comprising a particle purge valve and a particle blowing tool, which are connected to the particle sampling tube in sequence along the gas inlet direction.
10. The gas sampling device of claim 9, further comprising an exhaust gas collection device connected to an end of the particulate sampling tube, the exhaust gas collection device being disposed on a side of the particulate removal tool away from the particulate purge valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293769.7A CN115112440A (en) | 2021-03-19 | 2021-03-19 | Gas sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293769.7A CN115112440A (en) | 2021-03-19 | 2021-03-19 | Gas sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115112440A true CN115112440A (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110293769.7A Pending CN115112440A (en) | 2021-03-19 | 2021-03-19 | Gas sampling device |
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| Country | Link |
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| CN (1) | CN115112440A (en) |
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2021
- 2021-03-19 CN CN202110293769.7A patent/CN115112440A/en active Pending
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