CN101004241A - Air distributing device - Google Patents
Air distributing device Download PDFInfo
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- CN101004241A CN101004241A CN 200710036459 CN200710036459A CN101004241A CN 101004241 A CN101004241 A CN 101004241A CN 200710036459 CN200710036459 CN 200710036459 CN 200710036459 A CN200710036459 A CN 200710036459A CN 101004241 A CN101004241 A CN 101004241A
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- threeway
- gas
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- valve
- pressure gauge
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Abstract
The present invention relates to a gas distributor equipment. It is composed of raw material gas pipeline, dilution gas pipeline, needle valve, precision pressure gauge, capillary column, packed column and gas mixer. Said raw material gas pipeline is formed from series-connected raw material gas inlet, needle valve, precision pressure gauge and capillary column, and the dilution gas pipeline is formed from series-connected dilution gas inlet, needle valve, precision pressure gauge and packed column. Said invention also provides the working principle of said gas distributor equipment and its concrete operation method.
Description
Technical field
The present invention relates to a kind of air distributing device, be particularly useful for the preparation of the super low concentration gas that conventional equipment is difficult to prepare.
Background technique
Fast development along with gas analysis technology, the gas analysis detector that all kinds of sensitivity are high, as pulse flame photometric detector (PFPD), electron capture detector (ECD and μ ECD), atomic emission spectrum detector (AED), sulfur chemistry fluorescence detector (SCD), photomultiplier (Multiplier) etc., constantly be developed and use, the detectability of gas analysis has dropped to extremely low level, even reaches 1 * 10
-9Mg/cm
3The super low concentration level.And when carrying out gasometric analysis, often need to prepare some gaseous samples of corresponding concentration level, come the drawing standard concentration curve, the reference as accurately quantitatively the time.
In the gas device for formulating of routine, weighing means, static volume device and pressure unit etc. all can more accurately be prepared ppm concentration level (10
-5) gaseous sample, but as prepare ppb concentration level (10 with this class device
-9) gaseous sample, then come dilute sample except the need repeated multiple times repeats process for preparation, thus cause that preparation procedure is complicated, the operating time long outside, also unavoidably can bring precision preparation and repeated variation.If need the multi-component light concentration gas sample of preparation, then well imagine the complexity of its process for preparation.
Penetrant unit is another kind of gas device for formulating.By means of the constant permeation rate of permeability tube internal object source of the gas,, reach the purpose of dilution target source of the gas by regulating the flow of diluent gas.Utilize osmose process, can prepare ppb concentration level (10 in theory
-9) all kinds of gaseous samples, but constant in order to guarantee permeation rate, the source of the gas that stores in the permeability tube must be liquid, to keep bleed pressure substantially constant in the permeability tube.And majority of gas and be not easy to store with liquid state, so the application of osmose process has significant limitation.In addition, osmose process requires height to the control of temperature, pressure, flow, and the operating time that reaches stable state is long, thereby the preparation cost height of gaseous sample.
Usually, the low density of preparation is the super low concentration gaseous sample especially, and the slight absorption for the container wall avoiding existing guarantees its degree of accuracy, requires the resting period short as far as possible.This also is one of reason that does not have on the market supply of super low concentration gaseous sample.Obviously, rely on conventional air distributing device be difficult to satisfy accurate, quick, easy, prepare the demand of various super low concentration gases economically.
Summary of the invention
The object of the present invention is to provide a kind of accurate, quick, easy, economic air distributing device, can use the scene,,, solve the difficult problem of super low concentration gas preparation preferably to overcome the deficiency of existing air distributing device with using with joining.
The air distributing device that the present invention proposes, by the virgin gas pipeline, the diluent gas pipeline, needle-valve, precision pressure gauge, capillary column, packed column, two is logical, threeway and gas mixer are formed, its structure such as Fig. 1-shown in Figure 2, wherein: the virgin gas pipeline is successively by virgin gas suction port 31, needle-valve 1, be connected to the threeway 12 of precision pressure gauge 6, zero dead volume two logical 16 and capillary column 25 are composed in series, the diluent gas pipeline is successively by diluent gas suction port 32, threeway 10, needle-valve 2, be connected to the threeway 13 of precision pressure gauge 7, packed column 27, reducing two logical 18 is composed in series, the capillary column 25 of virgin gas pipeline is connected dilution threeway 23 respectively with the reducing of diluent gas pipeline two logical 18, dilution threeway 23 connects reducing two logical 20 successively, gas mixer 29, threeway 11, needle-valve 4, outlet nut 33, thus the pipeline that the virgin gas one-level is diluted formed;
When needs carry out the secondary dilution to virgin gas, above-mentioned raw materials gas one-level dilution pipeline is divided into two-way, wherein one tunnel emptying, another road constitutes new virgin gas pipeline by threeway 11 logical 17, the capillary column 26 of needle-valve 5, the threeway 15 that is connected to precision pressure gauge 9, zero dead volume two of connecting successively; By threeway 10 series connection needle-valves 3, the threeway 14 that is connected to precision pressure gauge 8, packed column 28, reducing two logical 19, constitute new diluent gas pipeline, the reducing two logical 19 of the capillary column 26 of new virgin gas pipeline and new diluent gas pipeline is connected dilution threeway 24 respectively, dilution threeway 24 connects successively that reducing two is logical 21, gas mixer 30, two is logical 22, outlet nut 34, thereby forms the pipeline to the dilution of virgin gas secondary;
When needs carry out diluting more than the secondary to virgin gas, and the like.
Among the present invention, needle-valve 1, needle-valve 2, needle-valve 3, needle-valve 4 and needle-valve 5 lay respectively at casing 35 tops, and precision pressure gauge 6, precision pressure gauge 7, precision pressure gauge 8 and precision pressure gauge 9 lay respectively at casing 35 the place aheads, and each precision pressure gauge surface outwards.
Among the present invention, the filler of inertia, non-absorption is set all in each gas mixer.
The present invention utilizes the flow of noticeable degree virgin gas and diluent gas, and the damping that provides by chromatographic column and the indication of precision pressure gauge make the inlet pressure of tow channel gas suitable substantially, to guarantee the stable of both flows.Simultaneously, in virgin gas and diluent gas pipeline, insert capillary column and packed column respectively to virgin gas and diluent gas inertia and non-absorption, utilize both difference to the damping of gas, the situation that the flow of virgin gas and diluent gas is more or less the same at its forefront pressure is issued to bigger difference, thereby improves thinner ratio.In addition, insert gas mixer in the gas piping after dilution, the filler of built-in inertia, non-absorption is to guarantee the uniformity of mixed gas.
The present invention calculates the thinner ratio of the known virgin gas of diluent gas and concentration according to the gas concentration of required preparation.Adjust force value before the post of indicating on the precision pressure gauge separately by regulating needle-valve on virgin gas and the diluent gas pipeline, make both flow-rate ratios satisfy the dilution requirement.Diluent gas and virgin gas are respectively by capillary column and packed column, and PARALLEL FLOW, is fully mixed the back through a gas mixer again and flowed out after threeway converges by a threeway, finishes the one-level dilution.If thinner ratio is excessive, can't reach requirement through the one-level dilution, then can implement secondary and even multistage dilution, step is the virgin gas that the preparation gas that the upper level dilution exports is diluted as next stage, according to diluting identical principle and similar pipe-line system with one-level, finish secondary or multistage dilution, until reaching the compound concentration requirement.
The invention has the advantages that:
1, can prepare the various gaseous samples that are lower than virgin gas concentration with a kind of virgin gas of concentration known;
2, can prepare the multicomponent gas sample of various combinations with the variety classes virgin gas of several concentration known;
3, the formulation operations program is easy, process for preparation is quick;
4, preparation degree of accuracy height can effectively be avoided the manual operation error;
5, process for preparation is once finished, and has guaranteed that the preparation result has good repeatability;
6, preparation cost is low.
Description of drawings
Fig. 1 is a secondary air distributing device flow chart of the present invention.
Fig. 2 is a secondary air distributing device rear view of the present invention.
Fig. 3 is a secondary air distributing device plan view of the present invention.
Fig. 4 is a secondary air distributing device left view of the present invention.
Number in the figure: 1～5 is needle-valve, and 6～9 is precision pressure gauge, and 10～15 are threeway, 16～17 is that zero dead volume two is logical, and 18～21 be that reducing two is logical, and 22 is two to lead to, 23～24 are the dilution threeway, 25～26 is capillary column, and 27～28 is packed column, and 29～30 is gas mixer, 31 is the virgin gas suction port, 32 is the diluent gas suction port, and 33,34 are respectively the outlet nut, and 35 is casing.
Embodiment
Further specify the present invention in conjunction with the accompanying drawings below by embodiment.
Embodiment 1: with the secondary air distributing device is example.
Be the embodiment of a secondary air distributing device as shown in Figure 1, Fig. 2 is the back vision structure figure of present embodiment, and Fig. 3 is the outward appearance plan view of present embodiment, and Fig. 4 is the outward appearance left view of present embodiment.But present embodiment does not constitute the restriction to the claim protection of multistage air distributing device.
The virgin gas of concentration known enters from virgin gas suction port 31, flow through needle-valve 1, precision pressure gauge 6 and capillary column 25, diluent gas enters from suction port 32, and the needle-valve 2 of flowing through, precision pressure gauge 7 and packed column 27, two-way gas enter dilution threeway 23, converge in dilution threeway 23, enter gas mixer then after 29 abundant mixing, flow out, finish the one-level dilution from one-level preparation gas air outlet 33, at this moment, needle-valve 3, needle-valve 5 are closed.When carrying out the secondary dilution, open needle-valve 3, needle-valve 5, metering pin valve 1, needle-valve 2, the pointer that makes precision pressure gauge 6 and precision pressure gauge 7 is to certain fixed position, one tunnel emptying of one-level diluent gas, another road enters the secondary dilution system through needle-valve 5, precision pressure gauge 9 and capillary column 26; Diluent gas one tunnel enters the one-level dilution system, another road enters the secondary dilution system through needle-valve 3, precision pressure gauge 8 and packed column 28, and two-way gas converges in dilution threeway 24, again after gas mixer 30 fully mixes, flow out from secondary preparation gas air outlet 34, finish the secondary dilution.
In Fig. 2, needle-valve 1, precision pressure gauge 6, capillary column 25 polyphones, needle-valve 2, precision pressure gauge 7, packed column 27 polyphones, article two, pipeline is merged into as one the tunnel through dilution threeway 23, be divided into two-way through behind the gas mixer 29 again, one the tunnel connects outlet nut 33, one the tunnel with needle-valve 5, precision pressure gauge 9, capillary column 26 and dilution threeway 24 polyphones, needle-valve 3, precision pressure gauge 8 and packed column 28, dilution threeway 24 polyphones, after dilution threeway 24 picks out, become one the tunnel, arrive outlet nut 34 through gas mixer 30.
As shown in Figure 3, needle-valve 1～5 all is positioned at the top of casing 35, and precision pressure gauge 6～9 lays respectively at the place ahead of casing 35, and each precision pressure gauge surface outwards.
As shown in Figure 4, each pipeline all is positioned at casing 35 inboards.
Below with the hydrogen of preparation 50ppb concentration, and with nitrogen is that diluent gas is an example, introduces the using method of this device in detail.Before diluting, set up the traffic alignment table earlier, install as follows: close needle-valve 2 and needle-valve 5, standard-sized sheet needle-valve 4, the aperture of metering pin valve 1 allows the H of 10ppm
2/ N
2Virgin gas 1 enters from entering the mouth, and makes pressure gauge 6 be stabilized in a certain numerical value, writes down the actual flow at outlet 1 place corresponding under each pressure, can obtain H
2/ N
2Gas traffic alignment table.Use the same method and to obtain diluent gas N
2The traffic alignment table.According to these two traffic alignment tables, when carrying out gas dilution, allow the H of 10ppm
2/ N
2Virgin gas and diluent gas N
2Enter from import 1 and import 2 respectively, the pressure stability that makes pressure gauge 6 and pressure gauge 7 is at 10kPa and 75kPa, and its corresponding gas flow is respectively 1.5ml/min and 300ml/min, so just can obtain aimed concn at outlet 1 place.
Claims (3)
1, a kind of air distributing device, by the virgin gas pipeline, the diluent gas pipeline, needle-valve, precision pressure gauge, capillary column, packed column, two is logical, threeway and gas mixer are formed, it is characterized in that the virgin gas pipeline is successively by virgin gas suction port (31), needle-valve (1), be connected to the threeway (12) of precision pressure gauge (6), zero dead volume two logical (16) and capillary column (25) are composed in series, the diluent gas pipeline is successively by diluent gas suction port (32), threeway (10), needle-valve (2), be connected to the threeway (13) of precision pressure gauge (7), packed column (27), reducing two logical (18) is composed in series, the reducing two logical (18) of capillary column of virgin gas pipeline (25) and diluent gas pipeline is connected dilution threeway (23) respectively, dilution threeway (23) connects reducing two logical (20) successively, gas mixer (29), threeway (11), needle-valve (4), outlet nut (33), thus the pipeline that the virgin gas one-level is diluted formed;
When needs carry out the secondary dilution to virgin gas, above-mentioned raw materials gas one-level dilution pipeline is divided into two-way, wherein one tunnel emptying, another road constitutes new virgin gas pipeline by threeway (11) connect successively needle-valve (5), the threeway (15) that is connected to precision pressure gauge (9), zero dead volume, two logical (17), capillary columns (26); By threeway (10) series connection needle-valve (3), the threeway (14) that is connected to precision pressure gauge (8), packed column (28), reducing two logical (19), constitute new diluent gas pipeline, the reducing two logical (19) of the capillary column (26) of new virgin gas pipeline and new diluent gas pipeline is connected dilution threeway (24) respectively, dilution threeway (24) connects reducing two logical (21), gas mixers (30), two logical (22), outlet nut (34) successively, thereby forms the pipeline to the dilution of virgin gas secondary;
When needs carry out diluting more than the secondary to virgin gas, and the like.
2, air distributing device according to claim 1, it is characterized in that needle-valve (1), needle-valve (2), needle-valve (3), needle-valve (4) and needle-valve (5) lay respectively at casing (35) top, precision pressure gauge (6), precision pressure gauge (7), precision pressure gauge (8) and precision pressure gauge (9) lay respectively at casing (35) the place ahead, and each precision pressure gauge surface outwards.
3, air distributing device according to claim 1 is characterized in that all being provided with in each gas mixer the filler of inertia, non-absorption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100364597A CN100458267C (en) | 2007-01-15 | 2007-01-15 | Air distributing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100364597A CN100458267C (en) | 2007-01-15 | 2007-01-15 | Air distributing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101004241A true CN101004241A (en) | 2007-07-25 |
| CN100458267C CN100458267C (en) | 2009-02-04 |
Family
ID=38703564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100364597A Expired - Fee Related CN100458267C (en) | 2007-01-15 | 2007-01-15 | Air distributing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100458267C (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606881A (en) * | 2012-02-17 | 2012-07-25 | 北京航空航天大学 | Clean air distributing device and clean air distribution method for plume testing platform |
| CN101382236B (en) * | 2008-09-28 | 2012-09-05 | 张永华 | Fluid multi-pipeline collecting transmission and distribution control system and control method |
| CN103558346A (en) * | 2013-11-15 | 2014-02-05 | 国家电网公司 | Device for checking sulfur hexafluoride leakage alarm apparatus |
| CN104525011A (en) * | 2014-12-30 | 2015-04-22 | 力合科技（湖南）股份有限公司 | Dynamic gas sample compounder and gas sample compounding method |
| CN105822897A (en) * | 2016-05-13 | 2016-08-03 | 国家电网公司 | Method and device for dynamic gas mixing and filling under pressure within wide range |
| CN105911224A (en) * | 2016-05-13 | 2016-08-31 | 国家电网公司 | Gas distribution method and gas distribution device for checking SF6 (sulfur hexafluoride) analyzer |
| CN106195636A (en) * | 2016-06-27 | 2016-12-07 | 天津市鹏翔科技有限公司 | Combination type carrier fluid device |
| CN107478494A (en) * | 2017-08-23 | 2017-12-15 | 力合科技（湖南）股份有限公司 | A kind of standard gas distribution meter |
| CN108554207A (en) * | 2018-06-15 | 2018-09-21 | 上海雷密传感技术有限公司 | A kind of low concentration calibrating gas continues generating means and its method for generation |
| CN109647235A (en) * | 2018-12-29 | 2019-04-19 | 苏州天蓝分析仪器有限公司 | A kind of dilution device based on gas mixing dilution mode |
| CN110487957A (en) * | 2018-05-14 | 2019-11-22 | 中国石油化工股份有限公司 | A kind of efficient gas alarm calibration method and device |
| CN112384798A (en) * | 2018-07-26 | 2021-02-19 | 英福康有限责任公司 | Method for adjusting the concentration of a sample gas in a gas mixture to be analyzed by means of a gas chromatograph assembly, and gas chromatograph assembly |
| CN114326841A (en) * | 2021-12-20 | 2022-04-12 | 杭州谱育科技发展有限公司 | Device and method for controlling water vapor concentration |
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| JPS60143738A (en) * | 1983-12-29 | 1985-07-30 | Shimadzu Corp | Manufacture of diluted gas |
| EP0370150A1 (en) * | 1988-11-21 | 1990-05-30 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for producing standard gas mixture and apparatus for producing the same |
| BR0100060A (en) * | 2000-01-13 | 2001-08-21 | Praxair Technology Inc | Compact gas mixing apparatus for accurately mixing a plurality of gases |
| CN2507015Y (en) * | 2000-04-11 | 2002-08-21 | 洪声礼 | Standard gas distributor |
| CN2536892Y (en) * | 2002-02-10 | 2003-02-19 | 华东船舶工业学院 | Gas mixing feeder |
| CN2789601Y (en) * | 2005-04-27 | 2006-06-21 | 孙国维 | Explosive gas preparing apparatus |
| CN100355490C (en) * | 2006-06-01 | 2007-12-19 | 上海交通大学 | Polycomponent gas mixing device |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382236B (en) * | 2008-09-28 | 2012-09-05 | 张永华 | Fluid multi-pipeline collecting transmission and distribution control system and control method |
| CN102606881A (en) * | 2012-02-17 | 2012-07-25 | 北京航空航天大学 | Clean air distributing device and clean air distribution method for plume testing platform |
| CN102606881B (en) * | 2012-02-17 | 2013-04-24 | 北京航空航天大学 | Clean air distributing device and clean air distribution method for plume testing platform |
| CN103558346A (en) * | 2013-11-15 | 2014-02-05 | 国家电网公司 | Device for checking sulfur hexafluoride leakage alarm apparatus |
| CN104525011A (en) * | 2014-12-30 | 2015-04-22 | 力合科技（湖南）股份有限公司 | Dynamic gas sample compounder and gas sample compounding method |
| CN105822897A (en) * | 2016-05-13 | 2016-08-03 | 国家电网公司 | Method and device for dynamic gas mixing and filling under pressure within wide range |
| CN105911224A (en) * | 2016-05-13 | 2016-08-31 | 国家电网公司 | Gas distribution method and gas distribution device for checking SF6 (sulfur hexafluoride) analyzer |
| CN106195636A (en) * | 2016-06-27 | 2016-12-07 | 天津市鹏翔科技有限公司 | Combination type carrier fluid device |
| CN107478494A (en) * | 2017-08-23 | 2017-12-15 | 力合科技（湖南）股份有限公司 | A kind of standard gas distribution meter |
| CN110487957A (en) * | 2018-05-14 | 2019-11-22 | 中国石油化工股份有限公司 | A kind of efficient gas alarm calibration method and device |
| CN108554207A (en) * | 2018-06-15 | 2018-09-21 | 上海雷密传感技术有限公司 | A kind of low concentration calibrating gas continues generating means and its method for generation |
| CN108554207B (en) * | 2018-06-15 | 2023-12-12 | 上海雷密传感技术有限公司 | Low-concentration standard gas continuous generation device and generation method thereof |
| CN112384798A (en) * | 2018-07-26 | 2021-02-19 | 英福康有限责任公司 | Method for adjusting the concentration of a sample gas in a gas mixture to be analyzed by means of a gas chromatograph assembly, and gas chromatograph assembly |
| CN112384798B (en) * | 2018-07-26 | 2024-02-09 | 英福康有限责任公司 | Method for adjusting concentration of sample gas and gas chromatograph assembly |
| US11982651B2 (en) | 2018-07-26 | 2024-05-14 | Inficon Gmbh | Method for adapting the concentration of a sample gas in a gas mixture to be analysed by a gas chromatograph assembly, and chromatograph assembly therefore |
| CN109647235A (en) * | 2018-12-29 | 2019-04-19 | 苏州天蓝分析仪器有限公司 | A kind of dilution device based on gas mixing dilution mode |
| CN114326841A (en) * | 2021-12-20 | 2022-04-12 | 杭州谱育科技发展有限公司 | Device and method for controlling water vapor concentration |
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| Publication number | Publication date |
|---|---|
| CN100458267C (en) | 2009-02-04 |
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