CN217305008U - Device for sampling and analyzing off-line gas sample - Google Patents
Device for sampling and analyzing off-line gas sample Download PDFInfo
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- CN217305008U CN217305008U CN202123314565.1U CN202123314565U CN217305008U CN 217305008 U CN217305008 U CN 217305008U CN 202123314565 U CN202123314565 U CN 202123314565U CN 217305008 U CN217305008 U CN 217305008U
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Abstract
The utility model discloses a device for off-line gas sample sampling analysis, including ball valve, filter core, manometer, suma jar, air supply, ooff valve, vacuum pump, pulse valve and time of flight mass spectrograph (TOFMS). The ball valve, the filter element, the pressure gauge and the suma tank form an offline gas sample sampling part, the gas source, the switch valve, the vacuum pump and the pulse valve form an injection analysis and suma tank cleaning part of the flight time mass spectrometer, the switch valve is opened after the sample analysis is finished to introduce inert gas into the suma tank, the pressure in the suma tank is read through the pressure gauge, and the vacuum pump is opened to clean the suma tank when certain pressure is reached. The device can realize mass storage of gas samples and meet the high-flux analysis requirement of the time-of-flight mass spectrometer.
Description
Technical Field
The invention is mainly applied to a device for sampling and analyzing off-line gas samples by a time-of-flight mass spectrometer, and particularly realizes sampling, storage and analysis of gas samples at different places by using the device. The device is convenient to operate, can realize mass storage of gas samples, and meets the high-flux analysis requirement of a time-of-flight mass spectrometer.
Background
In the field of gas analysis, the accuracy of a detection result is directly affected by different sampling modes, so that real-time online analysis methods are more and more extensive, but on-site online analysis cannot be realized for laboratory analysis instruments or large detection equipment, so that a traditional offline sampling mode is generally used. The time-of-flight mass spectrometer is a common instrument in an analysis method, has the advantages of high sensitivity and high analysis speed, and is very suitable for detection and analysis of high-flux gas samples.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a device for off-line gas sample sampling analysis, include the ball valve, cross filter core, manometer, suma jar, air supply, ooff valve, vacuum pump, pulse valve and time of flight mass spectrograph. One end of the ball valve is connected with the inlet of the filter element; the filterable outlet and the pressure gauge are connected with the inlet of the suma tank; the outlet of the Suma tank is respectively connected with the outlet of the switch valve and the inlets of the vacuum pump and the pulse valve; the inlet of the switch valve is connected with an air source, and the outlet of the pulse valve is connected with a flight time mass spectrometer. The filler in the filter element is quartz cotton or metal filter screen and is used for filtering large-particle impurities in the gas sample. The ball valve, the filter element, the pressure gauge and the Suma tank form a gas sampling part; the pressure gauge is used for indicating the pressure at the outlet end of the suma tank; according to the instantaneous sampling principle of the Suma tank, after the ball valve is opened, the gas sample is directly stored in the Suma tank through the filter element, and after sampling is finished, the ball valve is closed. The time-of-flight mass spectrometer adopts negative pressure sample injection, and a gas sample from the Suma tank is directly introduced into an ionization region of the time-of-flight mass spectrometer through a pulse valve for analysis; the sampling amount of the gas sample is controlled by adjusting the working frequency of the pulse valve. The air source, the switch valve and the vacuum pump form a cleaning part of the suma tank. After the gas sample in the Suma tank is analyzed, opening a vacuum pump to pump vacuum, and closing the vacuum pump when a pressure gauge indicating the pressure in the Suma tank reaches a certain pressure value; and meanwhile, opening the switch valve to introduce cleaning gas into the suma tank, observing that the gas sample is full of the cleaning gas through the pressure gauge, closing the switch valve, opening the vacuum pump to pump out the cleaning gas, and repeatedly cleaning for several times to avoid the sample residue in the suma tank. The gas source connected with the switch valve is one or two of nitrogen and inert gas (such as argon).
This patent utilizes the gaseous sample collection and the storage of suma jar realization different places, and sample sampling volume is big, satisfies the high flux analysis of time of flight mass spectrometry instrument. Meanwhile, the device has a cleaning function, and after sample analysis is finished, the sample can be prevented from being left by cleaning the suma tank, so that the aim of repeated use is fulfilled.
Drawings
FIG. 1 is an apparatus for off-line sampling analysis of a gas sample; 1-ball valve, 2-gas purification pipe, 3-pressure gauge, 4-suma tank, 5-gas source, 6-switch valve, 7-vacuum pump, 8-pulse valve, 9-flight time mass spectrometer.
Detailed Description
Please refer to fig. 1, which is a schematic structural diagram of the present invention.
The system comprises a ball valve, a gas purification pipe, a pressure gauge, a Suma tank, a gas source, a switch valve, a vacuum pump, a pulse valve and a time-of-flight mass spectrometer; one end of the ball valve is connected with an inlet of a gas purification pipe for removing particle impurities in the gas, and the other end of the ball valve is used as an inlet of a gas sample to be analyzed; the suma tank is respectively connected with the outlet of the gas purification pipe through a pipeline, is connected with the pressure gauge, is connected with the inlet of the gas source through a switch valve, is connected with the inlet of the vacuum pump through the switch valve, and is connected with the sample inlet of the time-of-flight mass spectrometer through a pulse valve. The outlet of the gas purification pipe is connected with the Suma tank, and a pressure gauge is arranged at the joint of the Suma tank and the gas purification pipe; the Suma tank is respectively connected with the outlet of the switch valve and the inlets of the vacuum pump and the pulse valve; the inlet of the switch valve is connected with an air source, and the outlet of the pulse valve is connected with a flight time mass spectrometer. The gas purification pipe is a pipe body filled with quartz wool and/or metal filter screens, and is used for filtering particle impurities in a gas sample. The ball valve is used for removing particle impurities in the gas and the gas sampling part consists of a gas purification pipe pressure meter and a Suma tank; the pressure gauge is used for indicating the pressure at the outlet end of the suma tank; according to the instantaneous sampling principle of the Suma tank, after the ball valve is opened, a gas sample is directly stored in the Suma tank through the gas purification pipe, and after sampling is finished, the ball valve is closed. The time-of-flight mass spectrometer adopts negative pressure sample injection, and a gas sample from the Suma tank is directly introduced into an ionization region of the time-of-flight mass spectrometer through a pulse valve for analysis; the sampling amount of the gas sample is controlled by adjusting the working frequency of the pulse valve. The gas source, the switch valve and the vacuum pump form a cleaning part of the Permai jar; a suma pot), opening a vacuum pump to vacuumize after the analysis of a gas sample in the suma pot is finished, and closing the vacuum pump when a pressure gauge indicating the pressure in the suma pot reaches a certain pressure value; and meanwhile, opening the switch valve to introduce cleaning gas into the suma tank, observing that the gas sample is full of the cleaning gas through the pressure gauge, closing the switch valve, opening the vacuum pump to pump out the cleaning gas, and repeatedly cleaning for several times to avoid the sample residue in the suma tank. The gas source connected with the switch valve is a gas source for providing one or two of nitrogen and inert gas.
During sampling, the ball valve and the suma tank are opened firstly, the gas sample is purified by utilizing the negative pressure in the suma tank and then is filled into the tank, when the pressure in the suma tank is balanced with the environmental pressure, the ball valve and the valve of the suma tank are closed, and the sample collection is finished.
When gas is analyzed, a valve on the Suma tank is opened, a sample in the tank is introduced into an ionization region of the time-of-flight mass spectrometer by using the pulse valve, after the gas in the Suma tank is analyzed, the pulse valve is closed, the switch valve is opened at the same time, the cleaning gas is filled, the vacuum pump is started to exhaust the cleaning gas after the gas is filled, the process can be repeated for several times, and the sample is prevented from being left and being re-filled in the tank. A pressure gauge at the outlet of the suma tank can indicate whether the gas is full or has been analyzed for depletion.
Claims (8)
1. An apparatus for off-line gas sample sampling analysis, characterized by:
comprises a ball valve (1), a gas purification pipe (2), a pressure gauge (3), a suma tank (4), a gas source (5), a switch valve (6), a vacuum pump (7), a pulse valve (8) and a flight time mass spectrometer (9);
one end of the ball valve (1) is connected with an inlet of a gas purifying pipe (2) for removing particle impurities in gas, and the other end of the ball valve (1) is used as an inlet of a gas sample to be analyzed;
the suma jar (4) is respectively connected with the outlet of the gas purification pipe (2) through a pipeline, is connected with the pressure gauge (3), is connected with the inlet of the gas source (5) through the switch valve (6), is connected with the inlet of the vacuum pump (7) through the switch valve, and is connected with the sample inlet of the flight time mass spectrometer (9) through the pulse valve (8).
2. The apparatus of claim 1, wherein:
the outlet of the gas purification pipe (2) is connected with the Suma tank (4), and a pressure gauge (3) is arranged at the joint of the Suma tank (4) and the gas purification pipe (2); the Suma tank (4) is respectively connected with an outlet of the switch valve (6) and inlets of the vacuum pump (7) and the pulse valve (8); the inlet of the switch valve (6) is connected with the air source (5), and the outlet of the pulse valve (8) is connected with the time-of-flight mass spectrometer (9).
3. The apparatus of claim 1 or 2, wherein:
the gas purification pipe (2) is a pipe body filled with quartz wool and/or metal filter screens and used for filtering particle impurities in a gas sample.
4. The apparatus of claim 1, wherein:
the ball valve (1), a gas purification pipe (2) for removing particle impurities in the gas, a pressure gauge (3) and a Suma tank (4) form a gas sampling part; the pressure gauge (3) is used for indicating the pressure at the outlet end of the Suma tank (4); according to the instantaneous sampling principle of the Suma tank (4), after the ball valve (1) is opened, a gas sample is directly stored in the Suma tank (4) through the gas purification pipe (2), and after sampling is finished, the ball valve (1) is closed.
5. The apparatus of claim 1, wherein:
the time-of-flight mass spectrometer (9) adopts negative pressure sample injection, and a gas sample from the Suma tank (4) is directly introduced into an ionization region of the time-of-flight mass spectrometer (9) through a pulse valve (8) for analysis; the sampling amount of the gas sample is controlled by adjusting the working frequency of the pulse valve (8).
6. The apparatus of claim 1, wherein:
the air source (5), the switch valve (6) and the vacuum pump (7) form a cleaning part of the Suma tank (4);
after the analysis of the gas sample in the Suma tank (4) is finished, opening a vacuum pump (7) to vacuumize, and closing the vacuum pump (7) when a pressure gauge (3) indicating the pressure in the Suma tank (4) reaches a certain pressure value; meanwhile, the switch valve (6) is opened to introduce cleaning gas into the suma tank (4), after the gas sample is observed to be full through the pressure gauge (3), the switch valve (6) is closed, the vacuum pump (7) is opened to pump out the cleaning gas, the cleaning can be repeated for several times, and the sample residue in the suma tank (4) is avoided.
7. The apparatus of claim 6, wherein:
the gas source connected with the switch valve (6) is a gas source for providing one or two of nitrogen and inert gas.
8. The apparatus of claim 1, wherein:
the Suma tank (4) is a gas sampling tank with a valve at a gas inlet and outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123314565.1U CN217305008U (en) | 2021-12-27 | 2021-12-27 | Device for sampling and analyzing off-line gas sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123314565.1U CN217305008U (en) | 2021-12-27 | 2021-12-27 | Device for sampling and analyzing off-line gas sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217305008U true CN217305008U (en) | 2022-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123314565.1U Active CN217305008U (en) | 2021-12-27 | 2021-12-27 | Device for sampling and analyzing off-line gas sample |
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| Country | Link |
|---|---|
| CN (1) | CN217305008U (en) |
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2021
- 2021-12-27 CN CN202123314565.1U patent/CN217305008U/en active Active
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