CN203203837U - Trace gas sampling connection device - Google Patents
Trace gas sampling connection device Download PDFInfo
- Publication number
- CN203203837U CN203203837U CN 201220639661 CN201220639661U CN203203837U CN 203203837 U CN203203837 U CN 203203837U CN 201220639661 CN201220639661 CN 201220639661 CN 201220639661 U CN201220639661 U CN 201220639661U CN 203203837 U CN203203837 U CN 203203837U
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- gas
- glass
- gas sampling
- trace gas
- trace
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to the field of stable isotope analysis technologies of trace gas, and specifically relates to a trace gas sampling connection device which is connected with a trace gas analyzer or a pre-concentration device. The trace gas sampling connection device comprises a glass gas sampling pipe with vacuum valves and dull polish heads at two ends, an experiment fixing clamp and a connection head with a gasket; firstly, the rear end of the connection head with the gasket is fixedly connected with an instrument through a joint nut of the instrument; and secondly, the dull polish heads at the two ends of the glass gas sampling pipe and the connection head with the gasket are clamped by the experiment fixing clamp to be fixed. In the process of sample change, the experiment fixing clamp is loosened and then the glass gas sampling pipe can be changed. The trace gas sampling connection device has the beneficial effects of conveniently and rapidly changing the trace gas test samples without gas leakage, decreasing the loss of the glass gas sampling pipe and the gasket and reducing the test cost.
Description
Technical field
The utility model relates to trace gas N
2O, CH
4, CO
2The stable isotope analysis technical field of isothermal chamber gas specifically is a kind of gas sampling coupling arrangement that is connected with the trace gas analysis instrument.
Background technology
Climate change is the global problem of current international community common concern, also is the severeest global environment problem that the mankind face.People will have the face of land of absorption infrared radiation, and the gas that increases the face of land and surface layer atmospheric temperature is called greenhouse gases.The main cause of climate change is because mankind's activity is discharged excessive carbon dioxide (CO in atmosphere
2), methane (CH
4) and nitrous oxide (N
2O) isothermal chamber gas causes.Inter-governmental climate change Professional Committee (IPCC) points out that if greenhouse gases continue with present drainage rate, then the temperature of earth surface might rise 0.2 ℃ in per 10 years.Therefore, how to reduce the greenhouse gases in the atmosphere, become the global atmosphere environmental problem that national governments are concerned about most.CO
2, CH
4And N
2O is as 3 kinds of topmost greenhouse gases, and they are the absorptive capacity of exterior heat radiation over the ground, and the contribution of greenhouse effect and the time that stops in atmosphere are had nothing in common with each other.In order to study the problem of global warming and depletion of the ozone layer, human strong day by day to the concern of these minimum gas in the atmosphere.
At present accurately measure terrestrial ecosystems greenhouse gas emission flux for more the concentrating on of the research of greenhouse gases, as monitor under the different ecological condition under (soil type, cropping system, weather, moisture condition and rate of fertilizer etc.), soil is launched the flux of these gases to atmosphere.But monitor the variation of gas concentration in this flux, only reflect the situation of the whole accumulation of these gases, can't determine the reason of these variations, also just limited formulation and the formation of the effective measures that how to reduce greenhouse gas emission.Stable isotope technology is as a kind of strong analysis tool, not only can follow the trail of the geochemistry cyclic process of source of students key element such as carbon, nitrogen and water etc., also can study the gas exchange, ecosystem function of the ecosystem and to the response of whole world change etc., utilize the variation of the stable isotope ratio of light element (C, N, O) can study source and the release rule of these micro-greenhouse gases, thereby help people to deepen about the source of these gases and the understanding of remittance, and the reduction of discharging measure of formulating greenhouse gases for people provide scientific basis.
Because the concentration of these gases in atmosphere is lower, limited the research of people for the earth accumulation of these trace gas.Both at home and abroad some research workers once utilized multiple enrichment facility and gas chromatography and mass spectrum (GC/MS) on-line unit to measure stable isotope ratio in these minimum gas.But when using conventional art, the sample gas scale of construction that needs is very big, with CH
4Work is generally done the air that a sample needs 50L for example.The trace gas analysis instrument of the most frequently used mensuration minimum gas stable isotope mainly contains two kinds in the market, the one, what be connected with ThermoFinnigan MAT-253 isotope mass spectrometer has full-automatic gas phase chromatogram (GC) pre-concentration interface arrangement (PreCon), and another is the full-automatic trace gas pre-concentration device TraceGas that is connected with the Isoprime100 isotope ratio mass spectrometer; These two kinds of trace gas analyzers can be used for greenhouse gases N
2O, CO
2, CH
4Determination and analysis Deng stable isotope ratios such as C, N, O in trace and the trace gas.The principle of PreCon and TraceGas is similar, all is to utilize carrier gas with gas extraction purifying, capture in the glass air collecting pipe, is purged by carrier gas at last to enter isotope mass spectrometer and measure stable isotope by it and form.But these two kinds of trace gas analyzers all are to add packing ring with the interface nut to fix and be connected the glass air collecting pipe, and there is following drawback in this connection: (1) packing ring is easily loosening, the gas leakage that generation is difficult for discovering, (2) packing ring is difficult for having bought, and must buy from external instrument manufacturer, (3) change glass air collecting pipe sample at every turn all will outward winding and tighten the interface nut, not only waste time and energy, and increased the frangibility of glass air collecting pipe.
Summary of the invention
Fix and the drawback that is connected the glass air collecting pipe in order to overcome in the existing trace gas analysis instrument, the utility model provides a kind of trace gas sampling coupling arrangement, this device has not only reduced the loss of packing ring, reduced testing cost, and difficult the generation leaked gas, more simplified the replacing step of glass air collecting pipe, made operation become easy to be time saving and energy saving.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of trace gas sampling coupling arrangement comprises that two ends have the glass gas sample tube of vacuum valve and frosted head, experiment geometrical clamp and have the connector of packing ring; Fixedlying connected with instrument by the interface nut of instrument self in the rear end that at first will have the packing ring connector, adopts the experiment geometrical clamp that the frosted head at glass gas sample tube two ends is clamped with the connector that has packing ring then and fix.
After the connector that utilizes the interface nut of instrument self fixing glass gas sample tube will have packing ring is fixed, only need unclamp the experiment geometrical clamp when changing the glass gas sample tube, and need not to outward winding and the interface nut of tightening instrument self.
Glass gas sampling pipe forthright vacuum valve, the frosted head in the vacuum valve outside can be clamped with the experiment geometrical clamp with the packing ring of connector can reach sealing effectiveness, is difficult for producing gas leakage.
When test gas sample need be changed, only need the experiment geometrical clamp is taken off, change the glass gas sample tube, again with the experiment geometrical clamp with the two ends frosted head of glass gas sample tube be connected head-clamp on get final product, need not to unscrew interface nut and connector, the next specimen of replacing that just can be fast and convenient.
The beneficial effects of the utility model are, can easy quick replacing adopt the gas test sample of glass gas sample tube, and be difficult for gas leakage, and reduce the loss of glass sampling pipe and packing ring, have saved testing expense and time.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the wiring layout of the utility model trace gas sampling coupling arrangement;
Fig. 2 is trace gas sampling coupling arrangement structural drawing;
Fig. 3 is that TraceGas extracts purifying N
2O gas procedure chart.
Among the figure: 1. glass gas sample tube, 2. vacuum valve, 3. gas sample tube frosted head, 4. copper connector, 5. plastic washers, 6. experiment geometrical clamp, 7. connector cut-open view, 8. plastic washers cut-open view, 9. experiment geometrical clamp cut-open view.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated, the effect of embodiment only is to explain and non-limiting the utility model.
Embodiment one: trace gas analysis instrument TraceGas-isotope ratio mass spectrometer is measured N in the air
2O nitrogen oxygen stable isotope
Fig. 3 extracts purifying N for TraceGas
2O gas procedure chart, embodiment one are exactly that 100mL sample bottle with TraceGas changes and does the utility model device.Particularly, in Fig. 1, at first plastic washers (5) is put to the wide head end of copper connector (4), and with two copper connectors (4) respectively with TraceGas self with the interface nut screwing clamping of fixing glass gas sample tube fix, then the frosted head (3) of glass gas sample tube and plastic washers (5) in the copper connector (4) contacts the back clamps with testing geometrical clamp (6), the utility model coupling arrangement as shown in Figure 2, so just sample has been put well, purge 30s by instrumental method control electromagnetic valve switch, with the air between glass gas sample tube vacuum valve (2) and the glass gas sample tube frosted head (3) with carrier gas (high-purity helium) displacement after, the vacuum valve (2) of glass gas sample tube opened simultaneously can carry out determination and analysis.When this gaseous sample analytical test finishes, when needing to change another specimen, the vacuum valve (2) of glass gas sample tube cuts out, experiment geometrical clamp (6) unclamps and takes off glass gas sampling bottle, then another glass gas sample tube is put into, with experiment geometrical clamp (6) the frosted head (3) at two ends is clamped to fix with the plastic washers (5) in the copper connector and get final product.So repetitive operation just can be measured a plurality of samples, and need not to outward winding and the interface nut of tightening instrument self.
Embodiment two: pre-concentration device PreCon-isotope mass spectrometer is measured CH in the air
4Carbon stable isotope
Be similar to the trace gas analysis instrument TraceGas that Isoprime company produces, pre-concentration device PreCon is produced by Thermo Fischer Scient Inc. (Thermo Fisher Scientific), PreCon is connected supporting use with ThermoFinnigan MAT-253 mass spectrometer or other model isotope ratio mass spectrometers that the said firm produces, measures N
2O, CO
2, CH
4Deng stable isotope ratios such as C, N, O in trace and the trace gas.The utility model embodiment two is put this installation drawing 2 to the sample hose place exactly.Particularly, in Fig. 1, at first plastic washers (5) is put to the wide head end of copper connector (4), and with two copper connectors (4) respectively with PreCon self with the interface nut screwing clamping of fixing glass gas sample tube fix, then the frosted head (3) of glass gas sample tube is clamped with experiment geometrical clamp (6) with the plastic washers (5) in the copper connector (4), instruct according to the method for instrument then, the vacuum valve (2) of glass gas sample tube opened simultaneously can carry out CH4 carbon stable isotope determination and analysis, when this gaseous sample analytical test finishes, when needing to change another specimen, the vacuum valve (2) of glass gas sample tube cuts out, then another glass gas sample tube is put into, with experiment geometrical clamp (6) the frosted head (3) at two ends is clamped to fix with the plastic washers (5) in the copper connector and get final product.Need not to outward winding and the interface nut of tightening instrument self, only need repeat to open and the simple operations of the frosted head (3) of clamping the glass gas sample tube with the copper connector (4) of built-in plastic washers (5), can measure a plurality of samples.
Claims (3)
1. trace gas sampling coupling arrangement comprises that two ends have the glass gas sample tube of vacuum valve and frosted head, experiment geometrical clamp and have the connector of packing ring; It is characterized in that: fixedly connected with instrument by the interface nut of instrument self in the rear end that at first will have the packing ring connector, adopts the experiment geometrical clamp that the frosted head at glass gas sample tube two ends is clamped with the connector that has packing ring then and fix.
2. trace gas according to claim 1 sampling coupling arrangement, it is characterized in that: after the connector that utilizes the interface nut of instrument self fixing glass gas sample tube will have packing ring is fixed, only need unclamp the experiment geometrical clamp when changing the glass gas sample tube, and need not to outward winding and the interface nut of tightening instrument self.
3. trace gas according to claim 1 sampling coupling arrangement, it is characterized in that, glass gas sampling pipe forthright vacuum valve, the frosted head in the vacuum valve outside can be clamped with the experiment geometrical clamp with the packing ring of connector can reach sealing effectiveness, is difficult for producing gas leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220639661 CN203203837U (en) | 2012-11-29 | 2012-11-29 | Trace gas sampling connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220639661 CN203203837U (en) | 2012-11-29 | 2012-11-29 | Trace gas sampling connection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203203837U true CN203203837U (en) | 2013-09-18 |
Family
ID=49147936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220639661 Expired - Fee Related CN203203837U (en) | 2012-11-29 | 2012-11-29 | Trace gas sampling connection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203203837U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713750A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | End gas sampling apparatus for detecting volatile organic compounds in expired air |
| CN114427991A (en) * | 2020-09-23 | 2022-05-03 | 中国石油化工股份有限公司 | Gas sample introduction bottle, gas isotope analysis system and method |
-
2012
- 2012-11-29 CN CN 201220639661 patent/CN203203837U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713750A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | End gas sampling apparatus for detecting volatile organic compounds in expired air |
| CN114427991A (en) * | 2020-09-23 | 2022-05-03 | 中国石油化工股份有限公司 | Gas sample introduction bottle, gas isotope analysis system and method |
| CN114427991B (en) * | 2020-09-23 | 2024-05-14 | 中国石油化工股份有限公司 | Gas sample injection bottle, gas isotope analysis system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20130918 Termination date: 20191129 |