CN102520056B - Dopant gas generating device - Google Patents
Dopant gas generating device Download PDFInfo
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- CN102520056B CN102520056B CN201110410109.9A CN201110410109A CN102520056B CN 102520056 B CN102520056 B CN 102520056B CN 201110410109 A CN201110410109 A CN 201110410109A CN 102520056 B CN102520056 B CN 102520056B
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Abstract
The invention relates to a dopant gas generating device. The dopant gas generating device is utilized for providing reaction gas for an ion mobility spectrometer. The dopant gas generating device comprises a doping tank, a gas inlet pipe, wherein an inlet end of the gas inlet pipe is connected to an upstream side of a gas carrying passage and an outlet end of the gas inlet pipe is connected to the doping tank, an gas outlet pipe, wherein an inlet end of the gas outlet pipe is connected to the doping tank and an outlet end of the gas outlet pipe is connected to a downstream side of the gas carrying passage, a dopant gas generating unit, wherein the dopant gas generating unit is utilized for releasing dopant gas and is arranged in the doping tank, and a bottom cover, wherein the bottom cover is removably connected to a lower end of the doping tank and is provided with a support for fixing the dopant gas generating unit. The dopant gas generating unit for releasing dopant gas is arranged in the doping tank and thus the dopant gas generating device is suitable for a solid doping agent and a liquid doping agent.
Description
The application is the divisional application of patent application case (denomination of invention is " doping gas generating means " for June 30 2009 applying date, application number 200910088628.0).
Technical field
The present invention relates to a kind of doping gas generating means, it both can use solid dopant, also can use liquid adulterant.More particularly, the present invention relates to a kind of for ionic migration spectrometer provides concentration stabilize, adjustable doping gas generating means, thereby can improve the detection performance of ionic migration spectrometer IMS instrument.
Background technology
Ion mobility spectrometry IMS is a kind of quick, sensitive, portable onthe technology of site test.This technology has started to be applied to military and safety check mechanism, can detect gas, explosive and drugs etc.Ionic migration spectrometer, in the time detecting prohibited items, in order to eliminate interference, improves the detection sensitivity of instrument, usually needs to introduce a small amount of polychlorohydrocarbon to the ionization chamber of migration tube the preferential ionization of polychlorohydrocarbon under ionogenic effect.Like this, it is competed with interfering material on the one hand, has reduced the ion concentration of interfering material, has reduced interference; On the other hand, it can be transferred to its ionic charge again detected material molecule, and the ion concentration of detected material is significantly increased, thereby has increased the response signal of detected material, has improved the detection sensitivity of instrument.
As dopant species, no matter liquid as methylene chloride etc., or solid-state as carbon trichloride etc., under normal temperature and pressure, there is a certain amount of gaseous molecular to keep with it balance, this gaseous molecular is exactly the doping gas that can play raising ionic migration spectrometer detection performance.Obviously, the dopant species of different dopant species, especially different shape, under identical condition, the concentration difference of its airborne gaseous molecular.In general the steam pressure of fluent meterial is more many greatly than the gaseous tension of the volatilization of solid matter.When test item is different, adulterant used and form are just different, and the condition that doping gas produces is also just different.While using liquid adulterant, require the container tightness of splendid attire adulterant to get well, not only ensure that instrument adulterant in use and transport process can not spill, but also will guarantee steadily to produce and ooze out the doping gas of minute quantity.While using solid dopant, also likely need to heat adulterant to increase doping gas generation.
At present, also do not take into account the doping gas generating means of these several performances simultaneously.Therefore, need to provide a kind of doping gas generating means, it is not only suitable for solid dopant, but also is suitable for liquid adulterant, and can regulate doping gas generating capacity.
Summary of the invention
Given this, the object of the invention is to overcome at least one aspect of problems of the prior art and defect.
Correspondingly, one of object of the present invention is to provide a kind of doping gas generating means, and it can be applicable to solid dopant and gaseous state adulterant simultaneously.
Another object of the present invention is to provide a kind of doping gas generating means, it can be controlled break-make and the doping of doping gas.
A further object of the present invention is to provide a kind of doping gas generating means, and it can be realized easily the replacing of adulterant or supplement.
According to an aspect of the present invention, its provide a kind of for ionic migration spectrometer provide doping gas doping gas generating means, comprising: doping tank; Draft tube, the entrance point of described draft tube is connected with the upstream side of carrier gas gas circuit, and its endpiece is connected with doping tank; Escape pipe, the entrance point of described escape pipe is connected with doping tank, and its endpiece is connected with the downstream of carrier gas gas circuit; Doping gas generating unit, it is for discharging impurity gas, and the gas generating unit that wherein adulterates is placed in described doping tank.
Particularly, described doping gas generating unit comprises: bottle; And adulterant, described adulterant is placed in described bottle.
In one embodiment, described adulterant is solid dopant; And described bottle comprises dismountable upper shed bottle cap, on described bottle cap, be provided with aperture, overflow with the volatilization gas that allows described solid dopant.
In another embodiment, described adulterant is liquid adulterant; In the upper shed of described bottle, be provided with permeable membrane, can prevent that liquid adulterant from spilling leakage, can allow again doping gas ooze out by permeable membrane.
Preferably, the described entrance point of described draft tube is provided with two-bit triplet solenoid valve; And the endpiece of described escape pipe is provided with 2/2-way solenoid valve.
Preferably, the described endpiece of described draft tube and the entrance point of described escape pipe roughly extend along the diagonal of described bottle.
Particularly, the described endpiece of described draft tube extends to the bottom of described bottle; And the entrance point of described escape pipe extends to be connected with the downstream of carrier gas gas circuit from the top of described bottle.
Further, the lower end of described doping tank is provided with the bottom being detachably connected on doping tank, is provided with the support of fixing described bottle on described bottom.
Preferably, doping gas generating means also comprises heating and temperature controlling device, and described heating and temperature controlling device comprises: around the heating film of described doping tank periphery wall; Detect the temperature sensor of the temperature of described doping tank; The temperature detecting based on temperature controller is controlled the temperature controller of the temperature of described doping tank; And the outside that covers described heating film is to seal the thermal insulating warm-keeping layer of described doping tank.
Preferably, described bottle and bottle cap are made up of hard resistant material.
At least one aspect of the present invention has following beneficial effect:
1. be placed in described doping tank by doping tank is set, and by the doping gas generating unit for discharging impurity gas, thereby doping gas of the present invention not only can be used solid dopant, also can be for liquid adulterant.
2. on the turnover tracheae of doping tank, have solenoid valve, can controlled doping gas whether add.It is far away that air inlet/outlet should be tried one's best in the position of doping tank, so that air flow energy fully flows inswept doping tank inside.
3. on doping tank bottom, the support that can fix adulterant bottle is installed, bottom is connected with doping tank by screw thread, can facilitate the replacing of adulterant or supplement.
4. by heating and temperature controlling device is set, thereby can, by the temperature of controlled doping tank so that doping tolerance is regulated, to regulate the addition of doping gas, the usability of ionic migration spectrometer be improved largely.
5. the bottle bottle cap of adulterant bottle is hard anticorrosive material, and bottle cap can be tightened by screw thread, and bottle cap central authorities are porose, and permeable membrane can be installed, and film can prevent that liquid adulterant from spilling leakage, can allow again micro-doping gas ooze out by film.
Brief description of the drawings
Accompanying drawing 1 is according to the structural representation of the doping gas generating means in the specific embodiment of the present invention.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.In instructions, same or analogous drawing reference numeral is indicated same or analogous parts.Followingly with reference to accompanying drawing, the explanation of embodiment of the present invention is intended to present general inventive concept of the present invention to make an explanation, and does not should be understood to a kind of restriction of the present invention.
Accompanying drawing 1 is according to the structural representation of the doping gas generating means in the specific embodiment of the present invention.Participate in Fig. 1, its show a kind of for ionic migration spectrometer provide doping gas doping gas generating means, comprising: doping tank 3; Draft tube 1, the entrance point 201 of described draft tube 1 is connected with the upstream side of carrier gas gas circuit 20, and its endpiece 202 is connected with doping tank 3; Escape pipe 2, the entrance point 203 of described escape pipe 2 is connected with doping tank 3, and its endpiece 204 is connected with the downstream of carrier gas gas circuit 20; Doping gas generating unit, it comprises adulterant 30 and for discharging impurity gas, the gas generating unit that wherein adulterates is placed in described doping tank 3.The current path that carrier gas gas circuit 20 is ion migration detector (IMS) that detected material inputs is arrived, for example carrier gas can be nitrogen or the air that purified.The left side of carrier gas gas circuit 20 from Fig. 1, upstream side is to, the right side in Fig. 1, and carry in downstream.
As shown in Figure 1, particularly, described doping gas generating unit comprises: bottle 5; And adulterant 30, described adulterant 30 is placed in described bottle 5.Described adulterant can be solid dopant or liquid adulterant.Described bottle 5 comprises and is detachably connected to its upper end to seal the bottle cap 6 of upper shed of described bottle 5, when described adulterant is while being solid-state, on described bottle cap 6, is provided with aperture 12, overflows with the volatilization gas that allows described solid dopant.When described adulterant is liquid adulterant, in the upper shed of described bottle 5, can be provided with permeable membrane 7, can prevent that liquid adulterant from spilling leakage, the gas that can adulterate again oozes out by permeable membrane 7.Can change the addition of doping gas by aperture, membrane area or film thickness on adjusting adulterant bottle cap 6.
Referring to Fig. 1, the described entrance point 201 of described draft tube 1 is provided with two-bit triplet solenoid valve 21; Meanwhile, the endpiece 204 of described escape pipe 2 is provided with 2/2-way solenoid valve 22.By above-mentioned setting, in the time that two-bit triplet solenoid valve 21 is switched on, it can turn-off or connect the air-flow branch road flowing in doping tank 3.On the other hand, the endpiece 204 of described escape pipe 2 is provided with 2/2-way solenoid valve 22, by the aperture of adjusting 2/2-way solenoid valve 22, the air-flow branch road that can control the doping tank 3 of flowing through imports the downstream of carrier gas gas circuit 20 and the size of doping airshed.
The described endpiece 202 of draft tube 1 roughly extends along the diagonal of described bottle 5 with the entrance point 203 of described escape pipe 2.As shown in Figure 1, the described endpiece 202 of described draft tube 1 extends to the bottom of described bottle 5; And the entrance point 203 of described escape pipe 2 extends to be connected with the downstream of carrier gas gas circuit 20 from the top of described bottle 5.By make inlet, outlet be arranged on doping tank position should be far away as best one can so that air flow energy fully flows inswept doping tank inside, thereby improved doping efficiency.
In one embodiment, referring to Fig. 1, the lower end of described doping tank 3 is provided with the bottom 4 being detachably connected on doping tank 3, is provided with the support 8 of fixing described bottle 5 on described bottom 4.By support 8 is set, for example shell fragment as described in Figure 1, it can be fixed on bottle 5 on bottom 6, thereby prevents adulterant, and particularly liquid adulterant occurs spilling in transport and use procedure.
Referring to Fig. 1, doping gas generating means also comprises heating and temperature controlling device, and it comprises: around the heating film 9 of described doping tank periphery wall; Detect the temperature sensor 10 of the temperature of described doping tank; The temperature detecting based on temperature controller is controlled the temperature controller 12 of the temperature of described doping tank; And the outside that covers described heating film is to seal the thermal insulating warm-keeping layer 11 of described doping tank.Heating film 9 can be resistance wire or printing thick-film heating element.Temperature sensor 10 can be thermopair or thermistor (temperature) sensor etc.Temperature controller 12 both can adopt mechanical temperature controller, also can adopt electronic temperature controller, such as resistance-type temperature controller or thermojunction type temperature controller etc.Thermal insulating warm-keeping layer 11 can adopt such as glass wool goods, polyurethane foam plastics or phenolic foam etc.By heating and temperature controlling device is set, in the time changing the temperature of doping gas tank, also can change the addition of doping gas.
Due to great majority doping gas, for example polychlorohydrocarbon has certain corrosivity, and described bottle 5 and bottle cap 6 are made up of hard resistant material, such as glass or stainless steel material etc.
Although some embodiment of this present general inventive concept are shown and explanation, those skilled in the art will appreciate that, in the case of the principle and spirit that do not deviate from this present general inventive concept, can make a change these embodiment, scope of the present invention limits with claim and their equivalent.
Claims (5)
1. the doping gas generating means that doping gas is provided for ionic migration spectrometer, comprising:
Doping tank;
Draft tube, the entrance point of described draft tube is connected with the upstream side of carrier gas gas circuit, and its endpiece is connected with doping tank;
Escape pipe, the entrance point of described escape pipe is connected with doping tank, and its endpiece is connected with the downstream of carrier gas gas circuit;
Doping gas generating unit, it is for discharging dopant gas, and the gas generating unit that wherein adulterates is placed in described doping tank; Wherein, doping gas generating unit comprises
Bottle; And
Adulterant, described adulterant is placed in described bottle; With
The lower end of described doping tank is provided with the bottom being detachably connected on doping tank, is provided with the support of fixing described doping gas generating unit on described bottom.
2. doping gas generating means according to claim 1, is characterized in that:
The described entrance point of described draft tube is provided with two-bit triplet solenoid valve; And
The endpiece of described escape pipe is provided with 2/2-way solenoid valve.
3. doping gas generating means according to claim 2, is characterized in that:
The described endpiece of described draft tube and the entrance point of described escape pipe roughly extend along the diagonal of described bottle.
4. doping gas generating means according to claim 3, is characterized in that:
The described endpiece of described draft tube extends to the bottom of described bottle; And
The entrance point of described escape pipe extends to be connected with the downstream of carrier gas gas circuit from the top of described bottle.
5. doping gas generating means according to claim 1, is characterized in that:
Described bottle and bottle cap are made up of hard resistant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110410109.9A CN102520056B (en) | 2009-06-30 | 2009-06-30 | Dopant gas generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110410109.9A CN102520056B (en) | 2009-06-30 | 2009-06-30 | Dopant gas generating device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100886280A Division CN101937822B (en) | 2009-06-30 | 2009-06-30 | Doping gas generation device |
Publications (2)
| Publication Number | Publication Date |
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| CN102520056A CN102520056A (en) | 2012-06-27 |
| CN102520056B true CN102520056B (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110410109.9A Active CN102520056B (en) | 2009-06-30 | 2009-06-30 | Dopant gas generating device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512947B (en) * | 2012-06-29 | 2015-07-01 | 中国科学院大连化学物理研究所 | Alternative gas switching method for ion mobility spectrometry in standby and analysis modes |
| CN103515186B (en) * | 2012-06-29 | 2015-12-09 | 中国科学院大连化学物理研究所 | A kind of ion mobility spectrometry gas control method in the standby state |
| CN104715999B (en) * | 2013-12-15 | 2017-01-11 | 中国科学院大连化学物理研究所 | Ionic mobility spectrometer and air path control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006205A (en) * | 1975-03-17 | 1977-02-01 | Etter Berwyn E | Means for applying additives to industrial gas |
| US7347219B2 (en) * | 2005-10-20 | 2008-03-25 | A. Y. Mcdonald Mfg. Co. | Meter bar and metering system |
| CN201141852Y (en) * | 2007-08-10 | 2008-10-29 | 上海新漫传感技术研究发展有限公司 | Air path connection module used for ion transfer spectrometer |
| CN101473221A (en) * | 2006-06-17 | 2009-07-01 | 史密斯探测-沃特福特有限公司 | Dopant delivery and detection systems |
| CN101937822B (en) * | 2009-06-30 | 2012-03-07 | 同方威视技术股份有限公司 | Doping gas generation device |
-
2009
- 2009-06-30 CN CN201110410109.9A patent/CN102520056B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006205A (en) * | 1975-03-17 | 1977-02-01 | Etter Berwyn E | Means for applying additives to industrial gas |
| US7347219B2 (en) * | 2005-10-20 | 2008-03-25 | A. Y. Mcdonald Mfg. Co. | Meter bar and metering system |
| CN101473221A (en) * | 2006-06-17 | 2009-07-01 | 史密斯探测-沃特福特有限公司 | Dopant delivery and detection systems |
| CN201141852Y (en) * | 2007-08-10 | 2008-10-29 | 上海新漫传感技术研究发展有限公司 | Air path connection module used for ion transfer spectrometer |
| CN101937822B (en) * | 2009-06-30 | 2012-03-07 | 同方威视技术股份有限公司 | Doping gas generation device |
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| CN102520056A (en) | 2012-06-27 |
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