CN203259512U - Gas chromatograph-mass spectrometer carrying gas control gas path apparatus - Google Patents
Gas chromatograph-mass spectrometer carrying gas control gas path apparatus Download PDFInfo
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- CN203259512U CN203259512U CN 201320303090 CN201320303090U CN203259512U CN 203259512 U CN203259512 U CN 203259512U CN 201320303090 CN201320303090 CN 201320303090 CN 201320303090 U CN201320303090 U CN 201320303090U CN 203259512 U CN203259512 U CN 203259512U
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Abstract
The utility model relates to a gas chromatograph-mass spectrometer, and discloses a gas chromatograph-mass spectrometer carrying gas control gas path apparatus. The apparatus is characterized in that a mass flow meter A is connected with one end of a solenoid valve B through a T-junction A, the other end of the solenoid valve B is connected with a vaporizing chamber, the T-junction A is connected with one end of a solenoid valve A, the other end of the solenoid valve A is connected with a T-junction B, the T-junction B is connected with the carrying gas inlet of the vaporizing chamber, the T-junction is connected with one end of a pressure sensor, the other end of the pressure sensor is connected with the gas outlet of a flow stabilizing valve through a mass flow meter B, the flow stabilizing valve is connected with a pointer pressure gage, a needle valve is connected to the purge gas outlet end of the vaporizing chamber to adjust the flow of a purge gas, and the vaporizing chamber is connected with a capillary column. The gas chromatograph-mass spectrometer carrying gas control gas path apparatus can realize the pressure/flow control, constant-flow constant-voltage mode control, and temperature and flow velocity compensation, and can obviously reduce the problems of pressure/flow fluctuation and slow reaction time during the solenoid valve switching in shunting state.
Description
Technical field
The utility model relates to a kind of gas chromatograph-mass spectrometer, is specifically related to a kind of gas chromatograph-mass spectrometer carrier gas and controls gas path device.
Background technology
Gas chromatograph-mass spectrometer is as the large-scale precision analytical instrument; if the mass spectrum part will work; need to keep normal flow; with the protection mass spectrum chamber vacuum tightness-below 3Pa; so the fluctuation ratio to the nebulizer gas pressure of gas chromatography and flow is more responsive, needs to adopt specific process to process and guarantee to reduce as much as possible this fluctuation in each action of control procedure.Every gas chromatograph all needs a carrier gas to control gas circuit, is mainly in early days by the manual control mode of needle valve, current stabilization/pressure maintaining valve combination, develops into afterwards the program controlled mode that has now made electron pressure/flow into; Present this electronic flow/control pressurer system is more common on the chromatogram of import abroad as the gas chromatograph standard configuration; The present several families of domestic gas chromatography are equipped with electron pressure/control gas circuit; Mainly by pressure transducer; Flow sensor; Pressure/flow controller; Switching solenoid valve and pipeline form; But due to the common 1ml/min of gas chromatograph-mass spectrometer carrier gas post flow commonly used left and right; The control accuracy of finished product pressure/flow controller and speed can not meet the demands; Particularly when the needs injection port divides stream mode switching and temperature compensation; Pressure/flow rate fluctuation is larger; Can not arrive rapidly setting value; Cause the repeated poor of sample analysis.Therefore relatively that is that all right is ripe for external product, has larger gap.
The utility model content
The purpose of this utility model is to provide a kind of gas chromatograph-mass spectrometer carrier gas and controls gas path device, thereby can realize that pressure/flow control, crossing current constant voltage mode are controlled, the compensation of temperature flow velocity, pressure/flow rate fluctuation and slow problem of reaction time in the time of can obviously reducing minute stream mode solenoid valve switching.
In order to achieve the above object, the utility model has following technical scheme:
Gas path device is controlled in a kind of gas chromatograph-mass spectrometer carrier gas of the present utility model; Wherein, Mass flowmeter one is connected with an end of solenoid valve two by T-shaped threeway one; The other end of solenoid valve two is connected with vaporizer; T-shaped threeway one also is connected with an end of solenoid valve one; The other end of solenoid valve one is connected with T-shaped threeway two; T-shaped threeway two also is connected with the carrier gas inlet of vaporizer; T-shaped threeway two also is connected with an end of pressure transducer; The pressure transducer other end is connected with the gas outlet of flow stabilizing valve by mass flowmeter two; Flow stabilizing valve also connects a pointer pressure; The sweep gas endpiece that needle valve is connected to vaporizer is used for regulating the flow of sweep gas; Described vaporizer also is connected with capillary column.
Wherein, connection between described mass flowmeter one, T-shaped threeway one, solenoid valve two, vaporizer, solenoid valve one, T-shaped threeway two, pressure transducer, mass flowmeter two, flow stabilizing valve, pointer pressure, needle valve all connects by rubber seal rings for seal.
Owing to having taked above technical scheme, the utility model has the advantage of:
When 1 the utility model can effectively solve the unlatching of shunting state, because of the slow build-up of pressure of mass flowmeter response speed/flow rate fluctuation problem, effectively improved gas chromatography carrier gas flux/pressure controlled stability.
2 the utility model costs are low, simple in structure.
Description of drawings
Fig. 1 is the schematic diagram of the utility model structure.
In figure: 1-mass flowmeter one; 2-mass flowmeter two; The 3-pointer pressure; 4-solenoid valve one; 5-solenoid valve two; The 6-pressure transducer; The 7-vaporizer; The 8-flow stabilizing valve; The 9-capillary column; 10-T type threeway one; 11-T type threeway two; The 12-needle valve; The sweep gas outlet of 13-vaporizer; The carrier gas inlet of 14-vaporizer; The gas outlet of 15-flow stabilizing valve.
Embodiment
Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
Referring to Fig. 1; Gas path device is controlled in gas chromatograph-mass spectrometer carrier gas of the present utility model; Wherein, Mass flowmeter one is connected by a T-shaped threeway one with an end of solenoid valve two; The other end of solenoid valve two is connected with vaporizer; T-shaped threeway is connected with an end of solenoid valve one again and again; The other end of solenoid valve one is connected with T-shaped threeway 2 11; T-shaped threeway two also is connected with the carrier gas inlet of vaporizer; T-shaped threeway two also is connected with pressure transducer; Pressure transducer also is connected with the gas outlet of flow stabilizing valve by mass flowmeter two; Flow stabilizing valve connects a pointer pressure; The sweep gas endpiece that needle valve is connected to vaporizer is used for regulating the flow of sweep gas; Described vaporizer also is connected with capillary column.
Connection between described mass flowmeter one, T-shaped threeway one, solenoid valve two, vaporizer, solenoid valve one, T-shaped threeway two, pressure transducer, mass flowmeter two, flow stabilizing valve, pointer pressure, needle valve all connects by rubber seal rings for seal.
In example shown in Figure 1, it is 0～100ml/min specification that mass flowmeter 1 is selected range, it is 0～200ml/min specification that mass flowmeter 22 is selected range, solenoid valve 25 shown in Figure 1 and solenoid valve 1 are selected 24V direct current supply, pointer pressure 3 range of adjustment are 0～0.4MPa, and flow stabilizing valve 8 range of adjustment are 0～200ml/min.Pressure transducer 6 range abilities are 0～300KPa.
When the utility model used, flow stabilizing valve was connected with He gas, and vaporizer is connected with ion gun by capillary column, and mass flowmeter one is connected with diffluence pass, and needle valve is connected with the purging end.
As shown in Figure 1; The solenoid valve 1 that is increasing; 1 minute regardless of stream mode the time; Be in open mode; The mass flowmeter one of diffluence pass this moment rear end has gas to pass through; And the flow of setting is exactly identical with shunt volume; When the solenoid valve 25 of diffluence pass after 1 minute is opened; Solenoid valve 1 cuts out immediately; Have gas to pass through state because the mass flowmeter one of diffluence pass rear end still is in this moment; Therefore be from gas being arranged to the control that gas is arranged; And total flow is constant; Just variation has occured in the path of flowing through of gas; Thereby the mass flowmeter one of diffluence pass rear end still is in stable state of a control; When efficiently solving the diverting valve switching; Because of the corresponding pressure that causes slowly of mass flowmeter/flow rate fluctuation problem.
Obviously, above-mentioned enforcement of the present utility model is only for the utility model example clearly is described, and is not to be restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here can't give all embodiments exhaustive.Everyly belong to the row that apparent variation that the technical solution of the utility model extends out or change still are in protection domain of the present utility model.
Claims (2)
1. gas path device is controlled in a gas chromatograph-mass spectrometer carrier gas; It is characterized in that: mass flowmeter one is connected with an end of solenoid valve two by T-shaped threeway one; The other end of solenoid valve two is connected with vaporizer; T-shaped threeway one also is connected with an end of solenoid valve one; The other end of solenoid valve one is connected with T-shaped threeway two; T-shaped threeway two also is connected with the carrier gas inlet of vaporizer; T-shaped threeway two also is connected with an end of pressure transducer; The pressure transducer other end is connected with the gas outlet of flow stabilizing valve by mass flowmeter two; Flow stabilizing valve also connects a pointer pressure; The sweep gas endpiece that needle valve is connected to vaporizer is used for regulating the flow of sweep gas; Described vaporizer also is connected with capillary column.
2. gas path device is controlled in a kind of gas chromatograph-mass spectrometer carrier gas as claimed in claim 1, it is characterized in that: the connection of described mass flowmeter one, T-shaped threeway one, solenoid valve two, vaporizer, solenoid valve one, T-shaped threeway two, pressure transducer, mass flowmeter two, flow stabilizing valve, pointer pressure, needle valve connects by rubber seal rings for seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320303090 CN203259512U (en) | 2013-05-29 | 2013-05-29 | Gas chromatograph-mass spectrometer carrying gas control gas path apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320303090 CN203259512U (en) | 2013-05-29 | 2013-05-29 | Gas chromatograph-mass spectrometer carrying gas control gas path apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203259512U true CN203259512U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320303090 Expired - Lifetime CN203259512U (en) | 2013-05-29 | 2013-05-29 | Gas chromatograph-mass spectrometer carrying gas control gas path apparatus |
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| CN (1) | CN203259512U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198628A (en) * | 2014-09-12 | 2014-12-10 | 江苏天瑞仪器股份有限公司 | Flow distribution/non-flow distribution sample inlet carrier gas control system of capillary gas chromatograph instrument |
| CN106841459A (en) * | 2017-03-31 | 2017-06-13 | 北京雪迪龙科技股份有限公司 | A kind of gas chromatography combined with mass spectrometry interface, system and flow matches method |
-
2013
- 2013-05-29 CN CN 201320303090 patent/CN203259512U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198628A (en) * | 2014-09-12 | 2014-12-10 | 江苏天瑞仪器股份有限公司 | Flow distribution/non-flow distribution sample inlet carrier gas control system of capillary gas chromatograph instrument |
| CN106841459A (en) * | 2017-03-31 | 2017-06-13 | 北京雪迪龙科技股份有限公司 | A kind of gas chromatography combined with mass spectrometry interface, system and flow matches method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |