CN202057634U - Sample feeding pressure stabilizing device for gas chromatograph - Google Patents
Sample feeding pressure stabilizing device for gas chromatograph Download PDFInfo
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- CN202057634U CN202057634U CN2011200570257U CN201120057025U CN202057634U CN 202057634 U CN202057634 U CN 202057634U CN 2011200570257 U CN2011200570257 U CN 2011200570257U CN 201120057025 U CN201120057025 U CN 201120057025U CN 202057634 U CN202057634 U CN 202057634U
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Abstract
The utility model discloses a sample feeding pressure stabilizing device for a gas chromatograph, which comprises a three-way valve, a digital-display pressure gauge, a flow meter and a three-way joint. One port of the three-way valve is used as a gas inlet, one port of the three-way valve is connected with one interface of the digital-display pressure gauge through a 1/8-inch stainless steel pipeline, the another port of the three-way valve is connected with one port of the three-way joint through a 1/4-inch stainless steel pipeline, the other interface of the digital-display pressure gauge is connected with one interface of the flow meter through a 1/8-inch stainless steel pipeline and a 1/4-inch stainless steel pipeline which are serially connected with each other, the other port of the three-way joint is connected with the other interface of the flow meter through a 1/8-inch stainless steel pipeline, the other port of the three-way joint is used as a gas outlet, and a flow adjusting knob is arranged on the flow meter. The sample feeding pressure stabilizing device for the gas chromatograph solves the problem that the sample feeding repeatability is poor because the sample feeding pressure of the existing gas chromatograph is unstable, and has the advantage of good sample feeding repeatability.
Description
Technical field
The utility model relates to gas chromatograph, especially for the sample introduction pressure stability device of gas chromatograph.
Background technology
When using gas chromatograph, often use pneumatic six-way valve and carry out the auto injection analysis, promptly by the repeatedly switching of pneumatic valve, reach repeatedly the purpose of sample introduction.In order accurately to analyze the concentration with measuring samples, must guarantee that the sample introduction process has fine repeatability, and the steady pressure during sample introduction is an essential condition of guaranteeing sample introduction repeatability, but can run into following two difficult problems in control sample introduction pressure and analytic sample process:
(1) in the sample introduction process, when each six-way valve switches, all can bring a pressure surge, for such fluctuation, general gas pressure reducer all can be subjected to influence in various degree, and this pressure when influencing meeting and directly changing sample introduction causes sample introduction repeatability variation.In order to guarantee the pressure stability in the sample introduction process, need in the sample introduction process, adjust sample introduction pressure at any time, to guarantee the repeatability of sample introduction, but at present no matter be that pressure display table on gas pressure reducer import or homemade is pointer-type, the pressure display table of this pointer-type is difficult to discover when pressure generation subtle change; In addition, the angle when observing may be different at every turn owing to the observer, also can cause the deviation of reading.
(2) to some adsorbability or low content sample analysis the time, be not suitable for using the reduction valve that has pointer pressure display table, and can select single-stage not have the reduction valve of pressure display table, can significantly reduce dead volume like this, improve the accuracy of analyzing.But the stability of this single-stage pressure reducing valve gets morely with compare the pressure control ability with the twin-stage reduction valve of pointer pressure display table, and can't show pressure, also can't adjust sample introduction pressure at any time then.Therefore, in the sample analysis process, use single-stage not have the table reduction valve, can make the repeatability of sample introduction become very poor, directly influence final test result.
The utility model content
The purpose of this utility model provides a kind of sample introduction pressure stability device that is used for gas chromatograph, to solve the problem that existing gas chromatograph sample introduction pressure transient causes the sample introduction poor repeatability.
The purpose of this utility model is achieved through the following technical solutions:
A kind of sample introduction pressure stability device that is used for gas chromatograph, comprise T-valve, the digital display type tensimeter, flowmeter and three-way connection, a port of described T-valve is as the gas access, another port is connected with the manometric interface of digital display type by one section 1/8 inch stainless steel pipeline, a remaining port is connected with a port of three-way connection by one section 1/4 inch stainless steel pipeline, manometric another interface of digital display type is connected with an interface of flowmeter by 1/8 inch stainless steel pipeline with 1/16 inch of serial connection, another port of three-way connection is connected with another interface of flowmeter by one section 1/8 inch stainless steel pipeline, the remaining port of three-way connection has the flow regulation knob as gas vent on the described flowmeter.
Described flow is counted suspended body flowmeter, and described T-valve has been adopted tee ball valve, and digital display type tensimeter precision is 0.1kPa.
The beneficial effects of the utility model are: utilize the characteristics that the digital display type tensimeter is readable by force, precision is high, can regulate sample introduction pressure exactly by the reduction valve on the gas cylinder in real time in view of the above, the effectively voltage stabilizing of damping action of 1/16 inch stainless steel pipeline, cooperate the flowmeter that can show and regulate the sample introduction gas flow in real time again, thereby guarantee the repeatability of sample introduction.
Description of drawings
With embodiment the utility model is described in further detail with reference to the accompanying drawings below.
Fig. 1 is the structural representation that is used for the sample introduction pressure stability device of gas chromatograph described in the utility model.
Among the figure: 1, T-valve; 2, digital display type tensimeter; 3, flowmeter; 4, three-way connection.
Embodiment
As shown in Figure 1, the sample introduction pressure stability device that is used for gas chromatograph of the present utility model, comprise T-valve 1, digital display type tensimeter 2, flowmeter 3 and three-way connection 4, a port of described T-valve 1 is as the gas access, another port is connected with an interface of digital display type tensimeter 2 by one section 1/8 inch stainless steel pipeline, a remaining port is connected with a port of three-way connection 4 by one section 1/4 inch stainless steel pipeline, another interface of digital display type tensimeter 2 is connected with an interface of flowmeter 3 by 1/8 inch stainless steel pipeline with 1/16 inch of serial connection, another port of three-way connection 4 is connected with another interface of flowmeter 3 by one section 1/8 inch stainless steel pipeline, three-way connection 4 remaining ports have the flow regulation knob as gas vent on the described flowmeter 3.
Particularly, described flowmeter 3 is a suspended body flowmeter, and described T-valve 1 is a tee ball valve.
This sample introduction pressure stability device is connected the quantitatively rear portion of ring of gas chromatograph, can not pollute quantitative ring.
This sample introduction pressure stability device mainly contains two mode of operations, i.e. control model and cleaning model, and T-valve is used for the switching between pattern.
When needs control sample introduction gaseous tension, demonstration and pilot-gas flow, T-valve is switched to control model, the Na Yilu that the stainless steel pipeline of T-valve this moment by 1/4 inch is connected with three-way connection is in closed condition, T-valve is in on-state by the Na Yilu that digital display type tensimeter etc. is connected to three-way connection, and sample introduction gas flows out from this sample introduction pressure stability device by digital display type tensimeter, 1/16 inch stainless steel pipeline, flowmeter and three-way connection.Show pressure when the sample introduction gas stream is crossed the digital display type tensimeter, can regulate sample introduction pressure exactly by the reduction valve on the gas cylinder in real time in view of the above this moment; When the sample introduction gas stream is crossed 1/16 inch stainless steel pipeline, be subjected to the damping action voltage stabilizing; The timing of sample introduction gas stream inflow-rate of water turbine shows flow, and can regulate flow this moment by the flow regulation knob on the flowmeter, thereby guarantees the repeatability of sample introduction.
When needs cleaning gas chromatography chromatogram quantification ring, T-valve is switched to cleaning model, this moment, T-valve was in closed condition by the Na Yilu that digital display type tensimeter etc. is connected to three-way connection, the Na Yilu that the stainless steel pipeline of T-valve by 1/4 inch is connected with three-way connection is in on-state, this path pipeline is thicker, a large amount of gases are passed through fast, be beneficial to the cleaning of quantitative ring.
The utility model mainly as the sample introduction pressure stability device of gas chromatograph, has the advantage of sample introduction good reproducibility.
Claims (2)
1. sample introduction pressure stability device that is used for gas chromatograph, it is characterized in that: comprise T-valve, the digital display type tensimeter, flowmeter and three-way connection, a port of described T-valve is as the gas access, another port is connected with the manometric interface of digital display type by one section 1/8 inch stainless steel pipeline, a remaining port is connected with a port of three-way connection by one section 1/4 inch stainless steel pipeline, manometric another interface of digital display type is connected with an interface of flowmeter by 1/8 inch stainless steel pipeline with 1/16 inch of serial connection, another port of three-way connection is connected with another interface of flowmeter by one section 1/8 inch stainless steel pipeline, the remaining port of three-way connection has the flow regulation knob as gas vent on the described flowmeter.
2. the sample introduction pressure stability device that is used for gas chromatograph according to claim 1, it is characterized in that: described flow is counted suspended body flowmeter, and described T-valve is a tee ball valve, and described digital display type tensimeter precision is 0.1kPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200570257U CN202057634U (en) | 2011-03-07 | 2011-03-07 | Sample feeding pressure stabilizing device for gas chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200570257U CN202057634U (en) | 2011-03-07 | 2011-03-07 | Sample feeding pressure stabilizing device for gas chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202057634U true CN202057634U (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200570257U Expired - Fee Related CN202057634U (en) | 2011-03-07 | 2011-03-07 | Sample feeding pressure stabilizing device for gas chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202057634U (en) |
Cited By (2)
| 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 |
| CN109580859A (en) * | 2018-12-25 | 2019-04-05 | 中核四0四有限公司 | A kind of gas chromatographic device gas circuit purification system and gas circuit purification method |
-
2011
- 2011-03-07 CN CN2011200570257U patent/CN202057634U/en not_active Expired - Fee Related
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 |
| CN105334278B (en) * | 2015-12-10 | 2017-05-31 | 新疆工程学院 | Gas chromatograph inlet end trace gas controller |
| CN109580859A (en) * | 2018-12-25 | 2019-04-05 | 中核四0四有限公司 | A kind of gas chromatographic device gas circuit purification system and gas circuit purification method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20130307 |