CN205175975U - Gas chromatograph inlet end trace gas control ware - Google Patents
Gas chromatograph inlet end trace gas control ware Download PDFInfo
- Publication number
- CN205175975U CN205175975U CN201521030402.2U CN201521030402U CN205175975U CN 205175975 U CN205175975 U CN 205175975U CN 201521030402 U CN201521030402 U CN 201521030402U CN 205175975 U CN205175975 U CN 205175975U
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- gas
- controller
- solenoid valve
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- inlet end
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Abstract
The utility model relates to a gas chromatograph inlet end trace gas control ware, including micro - gas flow controller and micro - gas pressure controller, micro - gas flow controller includes gas flowmeter, in the advancing of gas flowmeter, gas outlet punishment do not communicates into, the outlet duct, the intake pipe respectively with the carrier gas gas cylinder and the gas gas cylinder intercommunication that awaits measuring, do not set up first, second solenoid valve in intercommunication punishment to and connect first, the second governing valve behind first, second solenoid valve, the intercommunication has micro - gas pressure controller behind the gas flowmeter, trace gas pressure controller includes a constant voltage case, box intake pipe and box outlet duct are drawn together to the constant voltage case and bag, are provided with pressure sensor and third solenoid valve on the box outlet duct, meet dosing pipe behind the trace gas pressure controller, dosing pipe and gas chromatograph switch on. This application has reduced energy consumption and material loss, has promoted the precision of data, has reduced the emergence of experiment accident, has improved efficiency greatly.
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 explanation
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 utility model is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.Every belong to the technical solution of the utility model the apparent change of amplifying out or variation be still in the row of protection domain of the present utility model.
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 |
|---|---|---|---|
| CN201521030402.2U CN205175975U (en) | 2015-12-10 | 2015-12-10 | Gas chromatograph inlet end trace gas control ware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521030402.2U CN205175975U (en) | 2015-12-10 | 2015-12-10 | Gas chromatograph inlet end trace gas control ware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205175975U true CN205175975U (en) | 2016-04-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521030402.2U Withdrawn - After Issue CN205175975U (en) | 2015-12-10 | 2015-12-10 | Gas chromatograph inlet end trace gas control ware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205175975U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334278A (en) * | 2015-12-10 | 2016-02-17 | 新疆工程学院 | Gas inlet end trace gas controller for gas chromatograph |
| CN108519254A (en) * | 2018-04-03 | 2018-09-11 | 力合科技（湖南）股份有限公司 | sampling flow control device and gas analyzer |
| CN108776194A (en) * | 2018-04-03 | 2018-11-09 | 力合科技（湖南）股份有限公司 | Analytical equipment and gas analyzer |
-
2015
- 2015-12-10 CN CN201521030402.2U patent/CN205175975U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334278A (en) * | 2015-12-10 | 2016-02-17 | 新疆工程学院 | Gas inlet end trace gas controller for gas chromatograph |
| CN105334278B (en) * | 2015-12-10 | 2017-05-31 | 新疆工程学院 | Gas chromatograph inlet end trace gas controller |
| CN108519254A (en) * | 2018-04-03 | 2018-09-11 | 力合科技（湖南）股份有限公司 | sampling flow control device and gas analyzer |
| CN108776194A (en) * | 2018-04-03 | 2018-11-09 | 力合科技（湖南）股份有限公司 | Analytical equipment and gas analyzer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160420 Effective date of abandoning: 20170531 |