CN105334278A - Gas inlet end trace gas controller for gas chromatograph - Google Patents
Gas inlet end trace gas controller for gas chromatograph Download PDFInfo
- Publication number
- CN105334278A CN105334278A CN201510919190.1A CN201510919190A CN105334278A CN 105334278 A CN105334278 A CN 105334278A CN 201510919190 A CN201510919190 A CN 201510919190A CN 105334278 A CN105334278 A CN 105334278A
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- gas
- controller
- solenoid valve
- communicated
- casing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N2030/022—Column chromatography characterised by the kind of separation mechanism
- G01N2030/025—Gas chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
- G01N2030/324—Control of physical parameters of the fluid carrier of pressure or speed speed, flow rate
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Volume Flow (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a gas inlet end trace gas controller for a gas chromatograph. The gas inlet end trace gas controller comprises a trace gas flow controller body and a trace gas pressure controller body. The trace gas flow controller comprises a gas flowmeter, a gas inlet and a gas outlet of the gas flowmeter are communicated with a gas inlet pipe and a gas outlet pipe respectively, and the gas inlet pipe is communicated with a gas carrying gas cylinder and a to-be-tested gas cylinder. A first solenoid valve, a second solenoid valve, a first adjusting valve and a second adjusting valve are arranged at the communication positions respectively, the first adjusting valve is connected behind the first solenoid valve, and the second adjusting valve is connected behind the second solenoid valve. The trace gas pressure controller body is communicated behind the gas flowmeter, and comprises a constant-pressure box, the constant-pressure box comprises a box gas inlet pipe and a box gas outlet pipe, a pressure sensor and a third solenoid valve are arranged on the box gas outlet pipe, and a quantifying pipe is connected behind the trace gas pressure controller body, and communicated with the gas chromatograph. According to the gas inlet end trace gas controller, energy consumption and material loss are reduced, the precision of data is improved, experiment accidents are reduced, and efficiency is greatly improved.
Description
Technical field
The application relates to a kind of gas flow control device, particularly relates to a kind of gas chromatograph inlet end trace gas controller.
Background technology
At present, domestic and international gas chromatograph mainly contains three kinds of methods to intake method during gas analysis: a kind of method is that gas directly enters chromatograph quantity tube; Another kind method be gas first by a tensimeter, and then by the air inlet of chromatograph quantity tube; Also have a kind of method to be gas by after suspended body flowmeter again by the air inlet of chromatograph quantity tube.
Wherein in first method, gas directly enters chromatograph quantity tube, when operating personnel by gather gas access gas chromatograph quantity tube interface, experience with operator decides capacity to point pressure and is difficult to control, the error of data is large, if relate to poisonous and harmful flammable explosive gas, be difficult to ensure safety.
Wherein the second gas is by tensimeter, although the pressure effectively can controlling force value air inlet is still difficult to control, the data made are difficult to ensure precision, safety are also difficult to ensure.
The third is comparatively large by the fluctuation of suspended body flowmeter air inlet pressure force value, and the error of data is ensured more difficult in allowed limits, moreover safety is difficult to ensure card.
In sum, all there is following defect in existing three kinds of technology: first, the connection of its gas circuit is loaded down with trivial details, simple, leakproofness is poor, very easily causes the leakage of poisonous and harmful, flammable explosive gas, is difficult to the safety of warranty test personnel.Secondly, these three kinds of methods are difficult to guarantee the accurate of data.
Summary of the invention
The application, for above deficiency, proposes a kind of raising experimental safe, guarantees the gas chromatograph inlet end trace gas controller of test figure accuracy.
The object of the application is achieved in that gas chromatograph inlet end trace gas controller comprises minimum gas flow controller and minimum gas pressure controller, minimum gas flow controller comprises gas meter, be communicated with respectively into and out of tracheae at the inlet, outlet place of gas meter, before draft tube, pipeline is divided into two-way, be communicated with gas bottle to be measured with carrier gas gas cylinder respectively, be respectively arranged with first, second solenoid valve in connectivity part, and be connected to first, second variable valve after first, second solenoid valve; Minimum gas pressure controller is communicated with after gas meter, described minimum gas pressure controller comprises a constant voltage case, described constant voltage case comprises casing draft tube and casing escape pipe, casing draft tube is communicated with the escape pipe of These gases flowmeter, casing escape pipe is provided with pressure transducer and the 3rd solenoid valve, quantity tube is connect, quantity tube and gas chromatograph conducting after described minimum gas pressure controller.
The application's structure is simple, overcome the deficiency in original technology, preset pressure by trace gas controller in the application and determine flow value, stable pressure is there is in quantity tube when guaranteeing to use, dispatching from the factory test just can by pressure calibration, and namely user only need be convenient to operation by the setting value of demarcating.Also greatly reduce energy consumption and spillage of material, improve the precision of data, reduce the generation of experiment accident, substantially increase detection efficiency.
Accompanying drawing illustrates: the concrete structure of the application is provided by following drawings and Examples:
Fig. 1 is the application's structural representation;
Fig. 2 is the circuit diagram of the application;
Fig. 3 is constant voltage box structure schematic diagram.
Legend: 1, carrier gas gas cylinder, the 2, first solenoid valve, the 3, first variable valve, 4, rain glass, 5, gas meter, 6, minimum gas pressure controller, 7, pressure transducer, 8, the 3rd solenoid valve, 9, quantity tube, 10, gas chromatograph, 11, minimum gas flow controller, 12, minimum gas pressure controller, the 13, second variable valve, 14, the second solenoid valve, 15, gas bottle to be measured, 16, draft tube, 17, casing, 18, dividing plate, 19, escape pipe.
Embodiment: the application by the restriction of following embodiment, can not determine concrete embodiment according to the technical scheme of the application and actual conditions.
Embodiment: as Figure 1-3, gas chromatograph inlet end trace gas controller comprises minimum gas flow controller 11 and minimum gas pressure controller 12, minimum gas flow controller 11 comprises gas meter 5, be communicated with respectively into and out of tracheae at the inlet, outlet place of gas meter 5, before draft tube, pipeline is divided into two-way, be communicated with gas bottle 15 to be measured with carrier gas gas cylinder 1 respectively, be respectively arranged with first, second solenoid valve 2,14 in connectivity part, and be connected to first, second variable valve 3,13 after first, second solenoid valve; Gas pressure regulator 12 is communicated with after gas meter 5, described minimum gas pressure controller 12 comprises a constant voltage case, described constant voltage case comprises casing draft tube and casing escape pipe, casing draft tube is communicated with the escape pipe of These gases flowmeter 5, casing escape pipe is provided with pressure transducer 7 and the 3rd solenoid valve 8, quantity tube 9 is connect, quantity tube 9 and gas chromatograph 10 conducting after described minimum gas pressure controller 12.
Two-way pipeline before the draft tube of minimum gas flow controller 11 is also equiped with rain glass 4.
As shown in Figure 2, described pressure transducer 7 is connected with CPU processor with the 3rd solenoid valve 8, and CPU processor is connected with controller simultaneously, and first, second solenoid valve 2,14 is connected with controller circuitry.Described CPU processor is in order to receive the pressure signal sent by pressure transducer 7, after comparing with the setting value be preset in CPU processor, send signal to controller and the 3rd solenoid valve 8, manipulate first, second solenoid valve 2,14 pairs of air inlet pipelines by controller and carry out make-break operation.Described CPU processor and controller are prior art, and its concrete function and structure are not described in detail at this.
As shown in Figure 3, minimum gas pressure controller 6 comprises casing 17, in casing 17 interval, be staggered dividing plate 18, make to form S shape loop in casing 17, thus externally release the air-flow of steady pressure, aforementioned casing draft tube is communicated with side before and after casing 17 respectively with casing escape pipe.
When regulating carrier gas, first the stagnation pressure of giving vent to anger of carrier gas gas cylinder 1 is adjusted to 0.3MPa, then regulates first, second variable valve 3,13, Shi Ge road flow to reach desired value respectively.The chromatographic column used due to each user is different, and user in use can make its " pressure-flow " relation curve to every root chromatogram column, can know flow value when adjust flux by checking the pressure indicator of rain glass 4.
If when carrier gas is air, air stagnation pressure is transferred to 0.2MPa, then regulates first, second variable valve 3,13, Shi Ge road flow to reach desired value respectively.
Adjustment is when test sample gas, and such as helium, directly regulates first, second variable valve 3,13, and check pressure from two rain glasss 4.
Obviously, above-mentioned explanation of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.Every belong to technical scheme of the present invention the apparent change of amplifying out or variation be still in the row of protection scope of the present invention.
Claims (4)
1. a gas chromatograph inlet end trace gas controller, it is characterized in that: comprise minimum gas flow controller and minimum gas pressure controller, minimum gas flow controller comprises gas meter, be communicated with respectively into and out of tracheae at the inlet, outlet place of gas meter, before draft tube, pipeline is divided into two-way, be communicated with gas bottle to be measured with carrier gas gas cylinder respectively, be respectively arranged with first, second solenoid valve in connectivity part, and be connected to first, second variable valve after first, second solenoid valve; Minimum gas pressure controller is communicated with after gas meter, described minimum gas pressure controller comprises a constant voltage case, described constant voltage case comprises casing draft tube and casing escape pipe, casing draft tube is communicated with the escape pipe of These gases flowmeter, casing escape pipe is provided with pressure transducer and the 3rd solenoid valve, quantity tube is connect, quantity tube and gas chromatograph conducting after described minimum gas pressure controller.
2. gas chromatograph inlet end trace gas controller as claimed in claim 1, is characterized in that: the two-way pipeline before the draft tube of minimum gas flow controller is also equiped with rain glass.
3. gas chromatograph inlet end trace gas controller as claimed in claim 1, it is characterized in that: described pressure transducer is connected with CPU processor with the 3rd solenoid valve, CPU processor is connected with controller simultaneously, and first, second solenoid valve is connected with controller circuitry.
4. gas chromatograph inlet end trace gas controller as claimed in claim 1, is characterized in that: minimum gas pressure controller comprises casing, in casing interval, be staggered dividing plate, make to form S shape loop in casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919190.1A CN105334278B (en) | 2015-12-10 | 2015-12-10 | Gas chromatograph inlet end trace gas controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919190.1A CN105334278B (en) | 2015-12-10 | 2015-12-10 | Gas chromatograph inlet end trace gas controller |
Publications (2)
| Publication Number | Publication Date |
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| CN105334278A true CN105334278A (en) | 2016-02-17 |
| CN105334278B CN105334278B (en) | 2017-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510919190.1A Active CN105334278B (en) | 2015-12-10 | 2015-12-10 | Gas chromatograph inlet end trace gas controller |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102600A (en) * | 2017-06-05 | 2017-08-29 | 天华化工机械及自动化研究设计院有限公司苏州研究所 | Industrial chromatograph malleation inflates explosion-proof interlock |
| JP2017181173A (en) * | 2016-03-29 | 2017-10-05 | 日本写真印刷株式会社 | Gas chromatography device |
| CN109334746A (en) * | 2018-11-23 | 2019-02-15 | 新疆工程学院 | A kind of device that gas cylinder is moved into gas cabinet |
| CN110545706A (en) * | 2017-04-13 | 2019-12-06 | 泰通株式会社 | Dust suction device suitable for beads |
| CN110940765A (en) * | 2018-09-24 | 2020-03-31 | 西门子股份公司 | Fluid pressure control device and system and gas chromatograph |
| CN113494681A (en) * | 2020-03-20 | 2021-10-12 | 西门子股份公司 | Fluid pressure control device |
Citations (8)
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| US5339673A (en) * | 1992-04-06 | 1994-08-23 | Shimadzu Corporation | Gas chromatograph and method of using same |
| JPH07294504A (en) * | 1994-04-27 | 1995-11-10 | Hitachi Ltd | Gas chromatograph and carrier gas flow rate control method thereof |
| US20040238040A1 (en) * | 2003-05-28 | 2004-12-02 | Shimadzu Corporation | Gas chromatograph |
| CN101769908A (en) * | 2009-03-20 | 2010-07-07 | 上海精密科学仪器有限公司 | Automatic regulating device for flow pressure of gas chromatograph |
| CN202057634U (en) * | 2011-03-07 | 2011-11-30 | 中国计量科学研究院 | Sample feeding pressure stabilizing device for gas chromatograph |
| CN202305490U (en) * | 2011-11-04 | 2012-07-04 | 浙江福立分析仪器有限公司 | Electric pneumatic control device for gas chromatographs |
| CN105004820A (en) * | 2014-04-23 | 2015-10-28 | 株式会社岛津制作所 | Flow adjusting device and gas chromatograph comprising same |
| CN205175975U (en) * | 2015-12-10 | 2016-04-20 | 新疆工程学院 | Gas chromatograph inlet end trace gas control ware |
-
2015
- 2015-12-10 CN CN201510919190.1A patent/CN105334278B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5339673A (en) * | 1992-04-06 | 1994-08-23 | Shimadzu Corporation | Gas chromatograph and method of using same |
| JPH07294504A (en) * | 1994-04-27 | 1995-11-10 | Hitachi Ltd | Gas chromatograph and carrier gas flow rate control method thereof |
| US20040238040A1 (en) * | 2003-05-28 | 2004-12-02 | Shimadzu Corporation | Gas chromatograph |
| CN101769908A (en) * | 2009-03-20 | 2010-07-07 | 上海精密科学仪器有限公司 | Automatic regulating device for flow pressure of gas chromatograph |
| CN202057634U (en) * | 2011-03-07 | 2011-11-30 | 中国计量科学研究院 | Sample feeding pressure stabilizing device for gas chromatograph |
| CN202305490U (en) * | 2011-11-04 | 2012-07-04 | 浙江福立分析仪器有限公司 | Electric pneumatic control device for gas chromatographs |
| CN105004820A (en) * | 2014-04-23 | 2015-10-28 | 株式会社岛津制作所 | Flow adjusting device and gas chromatograph comprising same |
| CN205175975U (en) * | 2015-12-10 | 2016-04-20 | 新疆工程学院 | Gas chromatograph inlet end trace gas control ware |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017181173A (en) * | 2016-03-29 | 2017-10-05 | 日本写真印刷株式会社 | Gas chromatography device |
| CN110545706A (en) * | 2017-04-13 | 2019-12-06 | 泰通株式会社 | Dust suction device suitable for beads |
| CN107102600A (en) * | 2017-06-05 | 2017-08-29 | 天华化工机械及自动化研究设计院有限公司苏州研究所 | Industrial chromatograph malleation inflates explosion-proof interlock |
| CN110940765A (en) * | 2018-09-24 | 2020-03-31 | 西门子股份公司 | Fluid pressure control device and system and gas chromatograph |
| CN109334746A (en) * | 2018-11-23 | 2019-02-15 | 新疆工程学院 | A kind of device that gas cylinder is moved into gas cabinet |
| CN109334746B (en) * | 2018-11-23 | 2023-09-08 | 新疆工程学院 | Device for moving gas cylinder into gas cylinder cabinet |
| CN113494681A (en) * | 2020-03-20 | 2021-10-12 | 西门子股份公司 | Fluid pressure control device |
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| Publication number | Publication date |
|---|---|
| CN105334278B (en) | 2017-05-31 |
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