CN206420834U - A kind of gas chromatograph vacuum sampling device - Google Patents
A kind of gas chromatograph vacuum sampling device Download PDFInfo
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- CN206420834U CN206420834U CN201720045423.4U CN201720045423U CN206420834U CN 206420834 U CN206420834 U CN 206420834U CN 201720045423 U CN201720045423 U CN 201720045423U CN 206420834 U CN206420834 U CN 206420834U
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- gas
- vacuum
- valve
- gas chromatograph
- tracheae
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Abstract
The utility model provides a kind of gas chromatograph vacuum sampling device, described device includes calibrating gas gas cylinder, shuttle, gas chromatograph and vavuum pump, calibrating gas gas cylinder and shuttle are connected with the air inlet of gas chromatograph respectively by tracheae, and vavuum pump is connected by the exhaust outlet of tracheae and gas chromatograph；The pressure sensor for measuring endotracheal atmospheric pressure value and the vacuum meter for measuring endotracheal vacuum are installed on tracheae；It is also equipped with the temperature sensor of measuring environment temperature value.Gas chromatograph of the present utility model improves the traditional valve injection mode of gas chromatograph with vacuum sampling device, pollution of the surrounding air to sample gas is avoided, each component especially micro amount of oxygen, the precision of nitrogen measured portions analysis in sample gas is effectively increased；Sample introduction pressure can be adjusted simultaneously, it is to avoid too low, the expansion detector response range of linearity is overloaded or responded in gas chromatograph detector response, reduces analytical error.
Description
Technical field
The utility model belongs to gas chromatographicanalyzer technical field, and in particular to a kind of gas chromatograph vacuum sample introduction
Device.
Background technology
Gas chromatograph is widely used in terms of oil, chemical industry, biochemistry, medical and health, food industry, environmental protection,
Qualitative and quantitative analysis can be carried out to gas.In gas chromatographic analysis, sample introduction be quantitative analysis error main source it
One.The principle of input mode and sampling system, structure, the temperature using when material, sample introduction, sample size, sample introduction speed, sample introduction are used
Instrument etc. the repeatability and accuracy of the quantitative and qualitative of gas chromatographic analysis can all be had a direct impact.
Gaseous sample using commercialization valve injection system sample introduction is easy to operate, quantitative repeatability is good, but be not suitable for normal pressure,
Negative pressure sample feeding is analyzed, and is difficult to avoid that pollution of the surrounding air to gaseous sample, and analysis result is interfered, especially right
When micro amount of oxygen, nitrogen component in gaseous sample carry out quantitative analysis, oxygen, nitrogen impurity in air can severe jamming analysis knots
Really.Sample introduction circuit air is removed according to traditional Purge methods, can be taken considerable time and sample gas, and is difficult to eliminate pipeline
Air plankton.In addition, conventional valve input mode can not adjust sample introduction pressure, measurement enriched sample component or low concentration sample group
Timesharing, due to detector response overload or too low, can cause larger error to analysis result.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of gas chromatograph vacuum sampling device.
A kind of gas chromatograph vacuum sampling device of the present utility model, is characterized in, the device includes calibrating gas
Gas cylinder, shuttle, gas chromatograph and vavuum pump, calibrating gas gas cylinder and shuttle by tracheae respectively with gas-chromatography
The air inlet connection of instrument, vavuum pump is connected by the exhaust outlet of tracheae and gas chromatograph；Temperature sensor is also equipped with, is measured
Ambient temperature value, temperature value passes through temperature indicator meter reading；Pressure is connected with by pressure sensor valve on described tracheae
Sensor, measures endotracheal atmospheric pressure value, and atmospheric pressure value passes through pressure display instrument meter reading；Pass through vacuum meter valve on described tracheae
Vacuum meter is connected with, endotracheal vacuum is measured, vacuum passes through vacuum display instrument reading；Described gas chromatograph
Atmospheric valve is connected with exhaust outlet.
Being installed in series between described calibrating gas gas cylinder and tracheae has pressure-reducing valve and gas valve.
Being installed in series between described shuttle and tracheae has filter and sample air valve.
Being installed in series between described vavuum pump and tracheae has vacuum pumping valve and bellows.
Described tracheae is stainless steel tube, and vacuum is calculated as diagram vacuum gauge, and vavuum pump is dry vacuum pump.
The air inlet pipe of described gas chromatograph and the overall leakage rate of blast pipe are less than or equal to 10-7Pa·m3/s。
Described gas chromatograph vacuum sampling device also includes housing, and described temperature sensor, pressure are passed
Sensor valve and vacuum meter are installed on described enclosure interior；Described temperature display meter, pressure display instrument table, vacuum display instrument
Table, pressure sensor valve, vacuum meter, atmospheric valve, gas valve, sample air valve and vacuum pumping valve are installed on the positive face of described housing
Plate；The power line of described temperature display meter, pressure display instrument table and vacuum display instrument is integrated into the electricity of described housing
Source switch.
Described gas valve, sample air valve, pressure sensor valve, vacuum meter valve, vacuum pumping valve and atmospheric valve is bellows valve.
Gas chromatograph of the present utility model improves the traditional valve injection mode of gas chromatograph with vacuum sampling device,
Sample introduction pipeline is vacuumized before sample introduction, the foreign gas in sample introduction pipeline is removed, it is to avoid surrounding air is to detected sample
The pollution of product gas, effectively increases the analysis precision of sample gas, has been improved particularly micro amount of oxygen, the analysis of nitrogen measured portions
Precision；Sample introduction pressure can be adjusted simultaneously, it is to avoid when measurement enriched sample component or low concentration sample component, gas phase color
Spectrometer detector response is overloaded or responds too low, is expanded the detector response range of linearity, is reduced analytical error, with analysis
The degree of accuracy is high, advantage easy to use.
Brief description of the drawings
Fig. 1 is the fundamental diagram of gas chromatograph vacuum sampling device of the present utility model；
In figure, the sample gas of 1. calibrating gas gas cylinder, 2. shuttle, 3. pressure-reducing valve, 4. filter, 5. gas valve 6.
The pressure sensing of 10. pressure sensor of valve 7. temperature display meter, 8. temperature sensor, 9. pressure display instrument table 11.
The vacuum display instrument 17. of 15. vacuum meter of device valve 12. gas chromatograph, 13. atmospheric valve, 14. vacuum meter valve 16.
The housing of 18. vavuum pump of vacuum pumping valve 19..
Embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of gas chromatograph of the present utility model with vacuum sampling device include calibrating gas gas cylinder 1,
Shuttle 2, gas chromatograph 12 and vavuum pump 18, calibrating gas gas cylinder 1 and shuttle 2 by tracheae respectively with gas phase color
The air inlet connection of spectrometer 12, vavuum pump 18 is connected by tracheae with the exhaust outlet of gas chromatograph 12；It is also equipped with temperature biography
Sensor 8, measuring environment temperature value, temperature value passes through the reading of temperature display meter 7；Pass through pressure sensor valve on described tracheae
11 are connected with pressure sensor 10, measure endotracheal atmospheric pressure value, and atmospheric pressure value passes through the reading of pressure display instrument table 9；Described gas
Vacuum meter 15 is connected with by vacuum meter valve 14 on pipe, endotracheal vacuum is measured, vacuum passes through vacuum display instrument 16
Reading；Atmospheric valve 13 is connected with the exhaust outlet of described gas chromatograph 12.
Being installed in series between described calibrating gas gas cylinder 1 and tracheae has pressure-reducing valve 3 and gas valve 5.
Being installed in series between described shuttle 2 and tracheae has filter 4 and sample air valve 6.
Being installed in series between described vavuum pump 18 and tracheae has vacuum pumping valve 17 and bellows.
The stainless steel tube selects a diameter of 1/8in 316L stainless steel tubes, with specific reference to needing to be selected.
Described vacuum meter 15 is diagram vacuum gauge, and vavuum pump 18 is dry vacuum pump, but not limited to this can select it
Its species vacuum meter and vavuum pump.
The air inlet pipe of described gas chromatograph 12 and the overall leakage rate of blast pipe are less than or equal to 10-7Pa·m3/s。
Described gas chromatograph vacuum sampling device also includes housing 19, described temperature sensor 8, pressure
Sensor valve 11 and vacuum meter 15 are installed on inside described housing 19；Described temperature display meter 7, pressure display instrument table 9,
Vacuum display instrument 16, pressure sensor valve 11, vacuum meter 15, atmospheric valve 13, gas valve 5, sample air valve 6 and vacuum pumping valve 17 are pacified
Loaded on the described front panel of housing 19；Described temperature display meter 7, pressure display instrument table 9 and vacuum display instrument 16
Power line is integrated into the power switch of described housing 19.
Described gas valve 5, sample air valve 6, pressure sensor valve 11, vacuum meter valve 14, vacuum pumping valve 17 and atmospheric valve 13
For bellows valve, but not limited to this, other species valves can be selected.
Embodiment 1
A helium sample gas tank is taken, on the position of shuttle 2, measurement in accordance with the following steps obtains helium sample
Each impurity composition volumetric concentration in product.
1a. opens the power switch of housing 19, pressure sensor valve 11, vacuum meter valve 14 is opened, from pressure display instrument table
9th, atmospheric pressure value, vacuum and temperature value are obtained on vacuum display instrument 16 and temperature display meter 7, temperature value is 19.9 DEG C；
1b. closes gas valve 5, vacuum pumping valve 17 and atmospheric valve 13；
1c. starts vavuum pump 18, and vacuum pumping valve 17 and sample air valve 6 are opened successively, starts to vacuumize；
1d. when the reading of vacuum display instrument 16 be less than 5Pa after, close vacuum pumping valve 17, open shuttle 2 switch until
Required sample gas enters closing shuttle 2 after tracheae and switched, and is again turned on vacuum pumping valve 17 and vacuumizes；
1e. repeat steps 9d process 5-10 times；
1f. opens shuttle 2 and switched, according to the reading of pressure display instrument table 9, regulation shuttle 2 switch and sample gas
Valve 6, until the reading of pressure display instrument table 9 is reached after 102kPa, closes shuttle 2 and switchs；
1g. is by the measurement analysis sample gas of gas chromatograph 12, and the volumetric concentration for obtaining each component is H2：2.78ppm、
O2：5.02ppm、N2：4.96ppm.
Embodiment 2
It is He to take a Balance Air, and component is 5ppmH2,6.1ppmO2,7.5ppmN2 calibrating gas gas cylinder, is arranged on
On the position of calibrating gas gas cylinder 1, measurement in accordance with the following steps obtains the peak area of each component chromatographic peak in calibrating gas.
2a. opens the power switch of housing 19, pressure sensor valve 11, vacuum meter valve 14 is opened, from pressure display instrument table
9th, atmospheric pressure value, vacuum and temperature value are obtained on vacuum display instrument 16 and temperature display meter 7, temperature value is 19.9 DEG C；
2b. closes sample air valve 6 and vacuum pumping valve 17, open calibrating gas gas cylinder 1 switch, gas valve 5 and atmospheric valve 13, adjust
Pressure valve 3 is reduced, 3-5min is purged using calibrating gas；
2c close gas valve 5 and atmospheric valve 13, start vavuum pump 18, open vacuum pumping valve 17, start to vacuumize；
2d. closes vacuum pumping valve 17 after the reading of vacuum display instrument 16 is less than 5Pa, opens gas valve 5, regulation decompression
Valve 3, until the reading of pressure display instrument table 9, which reaches, closes gas valve 5 after about 100kPa, is again turned on vacuum pumping valve 17 and takes out very
It is empty；
2e. repeat steps d process 5-10 times；
2f. opens gas valve 5 and switched, according to the reading of pressure display instrument table 9, adjusts pressure-reducing valve 3, until pressure display instrument
The stable reading of table 9 closes gas valve 5 after 102kPa；
2g. measures analytical standard gas by gas chromatograph 12, and the peak area of each component chromatographic peak is H2：316255 μ
V•s、O2：1037798μV•s、N2：1067142μV•s.
Embodiment 3
The present embodiment and the embodiment of embodiment 2 are essentially identical, and the main distinction is, it is considered to which it is big that measurement process is subject to
The interference of oxygen nitrogen in gas, measures oxygen and nitrogen content in high-purity helium of the purity higher than 99.999%.A purity is taken to be higher than
99.999% high-pure helium gas cylinder, on the position of calibrating gas gas cylinder 1, measurement analysis oxygen and nitrogen content obtains measuring process
Present in background oxygen nitrogen volumetric concentration be O2：0.06ppm、N2：0.25ppm.
Claims (5)
1. a kind of gas chromatograph vacuum sampling device, it is characterised in that the device includes calibrating gas gas cylinder（1）, sample
Container（2）, gas chromatograph（12）And vavuum pump（18）, calibrating gas gas cylinder（1）And shuttle（2）By tracheae respectively with
Gas chromatograph（12）Air inlet connection, vavuum pump（18）Pass through tracheae and gas chromatograph（12）Exhaust outlet connection；Also
Temperature sensor is installed（8）, measuring environment temperature value, temperature value passes through temperature display meter（7）Reading；On described tracheae
Pass through pressure sensor valve（11）It is connected with pressure sensor（10）, endotracheal atmospheric pressure value is measured, atmospheric pressure value is aobvious by pressure
Show instrument（9）Reading；Pass through vacuum meter valve on described tracheae（14）It is connected with vacuum meter（15）, measure endotracheal vacuum
Degree, vacuum passes through vacuum display instrument（16）Reading；Described gas chromatograph（12）Exhaust outlet on be connected with atmospheric valve
（13）.
2. gas chromatograph according to claim 1 vacuum sampling device, it is characterised in that described calibrating gas gas
Bottle（1）Being installed in series between tracheae has pressure-reducing valve（3）With gas valve（5）.
3. gas chromatograph according to claim 1 vacuum sampling device, it is characterised in that described shuttle
（2）Being installed in series between tracheae has filter（4）With sample air valve（6）.
4. gas chromatograph according to claim 1 vacuum sampling device, it is characterised in that described gas chromatograph
（12）Air inlet pipe and blast pipe overall leakage rate be less than or equal to 10-7Pa·m3/s。
5. the gas chromatograph vacuum sampling device according to claim 1,2,3 or 4, it is characterised in that also including one
Individual housing（19）, described temperature sensor（8）, pressure sensor valve（11）And vacuum meter（15）It is installed on described housing
（19）It is internal；Described temperature display meter（7）, pressure display instrument table（9）, vacuum display instrument（16）, pressure sensor valve
（11）, vacuum meter（15）, atmospheric valve（13）, gas valve（5）, sample air valve（6）And vacuum pumping valve（17）It is installed on described housing
（19）Front panel；Described temperature display meter（7）, pressure display instrument table（9）With vacuum display instrument（16）Power line
It is integrated into described housing（19）Power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720045423.4U CN206420834U (en) | 2017-01-16 | 2017-01-16 | A kind of gas chromatograph vacuum sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720045423.4U CN206420834U (en) | 2017-01-16 | 2017-01-16 | A kind of gas chromatograph vacuum sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206420834U true CN206420834U (en) | 2017-08-18 |
Family
ID=59571164
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720045423.4U Expired - Fee Related CN206420834U (en) | 2017-01-16 | 2017-01-16 | A kind of gas chromatograph vacuum sampling device |
Country Status (1)
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| CN (1) | CN206420834U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706816A (en) * | 2017-01-16 | 2017-05-24 | 中国工程物理研究院核物理与化学研究所 | Vacuum sampling device for gas chromatograph |
| CN109991344A (en) * | 2019-04-04 | 2019-07-09 | 深圳博沃智慧科技有限公司 | A kind of surrounding air and the management method of the continuous online monitoring data processing of water body VOCs |
-
2017
- 2017-01-16 CN CN201720045423.4U patent/CN206420834U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706816A (en) * | 2017-01-16 | 2017-05-24 | 中国工程物理研究院核物理与化学研究所 | Vacuum sampling device for gas chromatograph |
| CN109991344A (en) * | 2019-04-04 | 2019-07-09 | 深圳博沃智慧科技有限公司 | A kind of surrounding air and the management method of the continuous online monitoring data processing of water body VOCs |
| CN109991344B (en) * | 2019-04-04 | 2021-06-15 | 深圳博沃智慧科技有限公司 | Management method for continuous online monitoring data processing of VOCs (volatile organic compounds) in ambient air and water |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170818 Termination date: 20190116 |