CN205138991U - Gaseous phase molecule absorption spectrum appearance extinction pipe - Google Patents
Gaseous phase molecule absorption spectrum appearance extinction pipe Download PDFInfo
- Publication number
- CN205138991U CN205138991U CN201520782078.3U CN201520782078U CN205138991U CN 205138991 U CN205138991 U CN 205138991U CN 201520782078 U CN201520782078 U CN 201520782078U CN 205138991 U CN205138991 U CN 205138991U
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- light
- light source
- described body
- extinction
- gas phase
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Abstract
The utility model relates to a gaseous phase molecule absorption spectrum appearance extinction pipe, the structure of body is the little closed body in the big centre in both ends, describe or linearity contracting structure for the curve from the wideest transition structure to the most carefully locating on the body. The utility model discloses a route of shining of managing the extinction according to light sets up to will be wherein the position in the shrink of light source focus department for the tubule, can realize not sheltering from / loss light source light's prerequisite under effectual improvement pipe diameter constriction part position unit gas flux, improve the gaseous utilization ratio of sample, simultaneously, the focus of convex lens has improved light source light energy use rate on concentrating light source light on less area, thereby has improved the measuring accuracy.
Description
Technical field
The utility model relates to spectrometer technology, is specifically related to a kind of gas phase molecular absorption spectrometer extinction pipe.
Background technology
Gas-phase molecular absorption spectrometry method (being called for short GPMAS) is that the relation of gas to the absorption intensity of light and measured component concentration resolved into based on tested composition carries out quantitative measurement in accordance with this principle of law of light absorption; According to the difference of absorbing wavelength, also can determine determined composition and carry out qualitative analysis.
The instrument of Gas-phase Molecular Absorption Spectrometry component content is used to be called: gas phase molecular absorption spectrometer.
When using Gas-phase Molecular Absorption Spectrometry testing sample gas, the sample gas handled well need be made by light path, because testing sample quantity of sampling quantity is few, therefore need the utilization ratio, simultaneously the guarantee light that improve tested gas by the high-level efficiency of light path.
Because light source is generally parallel directive property light source, the exit portal diameter of light source is certain, therefore, in order to make full use of source light, should ensure that the light mouth of extinction pipe gets light source illumination as much as possible, extinction pipe can the illumination of projection gained as much as possible.
Because amount of gas to be measured is few, therefore reducing extinction pipe caliber is the effective means improving gas utilization efficiency, improve gas absorption feedback.
In order to solve the comparatively large contradiction with reducing extinction pipe caliber raising gas absorption measurement efficiency of light outgoing bore, between light source and gas passage, add one can the lens of refracted ray or lens combination, utilize optical principle that light is become biconial light from parallel light focusing, but existing extinction pipe mostly is straight tube, cause gas dispersion to be measured, the accuracy of measurement can be reduced.
Utility model content
The purpose of this utility model is to provide a kind of gas phase molecular absorption spectrometer extinction pipe, by concentrating gas to be measured in light source focus, solving the inaccurate problem of a small amount of gasmetry, ensure that the sensitivity of measurement.
The purpose of this utility model is achieved through the following technical solutions:
Further, the structure of described body is the closed tube of big at both ends and small in middle, the putting position that the cross section of described body is the most carefully located is positioned at light source focus place, source light focuses on and concentrates on less area by lens or lens combination, gas to be measured is assembled when the most carefully place by described body, make the focus of light source irradiate the gas to be measured assembled, improve the utilization factor of source light energy, thus a small amount of gas of realization measurement can ensure measuring accuracy.
Further, described body from the widest part to transition structure is the most carefully curve-like or linearity contraction structure.
Further, the section radius the most carefully located of described body is not less than 2mm.
Further, the two ends of described body are equipped with the sealing of transparent goggles, and described transparent goggles, perpendicular to the axis of described body, for sealing, prevents Leakage Gas to be measured, simultaneously for printing opacity; Described body two ends also can be provided with non-flat optical lens or lens combination sealing.
Further, the two ends sidewall of described body is respectively equipped with draft tube and escape pipe, described draft tube and escape pipe is equal and be provided with angle a between described body.
Further, the angular range of described angle a is 40 °-90 °.
Further, described body, draft tube and escape pipe are structure as a whole, and be convenient to processing, cost of manufacture is low.
The beneficial effects of the utility model are: the utility model is by arranging the exposure pathways of extinction pipe by light, and will wherein be positioned at light source focus place and be punctured into tubule in portion, can realize not blocking/prerequisite of loss source light under the effective caliber that improves shrink the unit air flux at position, improve the utilization factor of sample gas, simultaneously, source light concentrates on less area by the focusing of convex lens, improve the utilization factor of source light energy, thus improve measuring accuracy.
Accompanying drawing explanation
With reference to the accompanying drawings the utility model is described in further detail below.
Fig. 1 is the light path principle figure of a kind of gas phase molecular absorption spectrometer extinction pipe described in the utility model embodiment, and wherein dotted line is source light;
Fig. 2 is the structural representation of a kind of gas phase molecular absorption spectrometer extinction pipe described in the utility model embodiment;
Fig. 3 be Fig. 2 middle tube body 8 face structural drawing.
In figure:
1, the most carefully locate; 2, the widest part; 3, draft tube; 4, escape pipe; 5, convex lens; 6, body axis; 7, light source; 8, body; 9, transparent goggles; 10, attached body.
Embodiment
Embodiment 1
As shown in Figure 1, a kind of gas phase molecular absorption spectrometer extinction pipe described in the utility model embodiment, comprise body 8, the section radius of described body 8 reduces from two ends gradually to centre, on described body 8 the widest part 2 to the most carefully locate 1 transition structure be curve-like contraction structure or linearity contraction structure, on described body 8 the most carefully locate 1 section radius be 3mm, the two ends of described body 8 are equipped with transparent goggles 9, described transparent goggles 9 perpendicular to the axis of described body 8, for sealing.
The putting position that the cross section of described body 8 the most carefully locates 1 is positioned at the light focus place of light source 7, light source 7 light concentrates on less area by the focusing of convex lens 5, gas to be measured is assembled when the most carefully being located 1 by body 8, the light focus of light source 7 is made to irradiate the gas to be measured assembled, improve the capacity usage ratio of light source 7 light, thus a small amount of gas of realization measurement can ensure measuring accuracy.
The two ends sidewall of described body 8 is respectively equipped with draft tube 3 and escape pipe 4, described draft tube 3 and escape pipe 4 is equal and be provided with angle a between described body 8, the angular range of described angle a is 40 °-90 °, and the angle of described angle a is 90 °; Described body 8, draft tube 3 are structure as a whole with escape pipe 4, and be convenient to processing, cost of manufacture is low; Described body 8, draft tube 3 are quartz glass tube body 8 with escape pipe 4.
Embodiment 2
Except following technical characteristic, all the other even embodiments one are identical, as Figure 2-3, a kind of gas phase molecular absorption spectrometer extinction pipe described in the utility model embodiment, comprise body 8, the section radius of described body 8 reduces from two ends gradually to centre, the section radius the widest part 2 at the two ends of described body 8 is equipped with outward extending attached body 10, and described attached body 10 is the straight tube body 8 of uniform cross section radius.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection domain of the present utility model.
Claims (7)
1. a gas phase molecular absorption spectrometer extinction pipe, comprises body, it is characterized in that: the structure of described body is the closed tube of big at both ends and small in middle.
2. gas phase molecular absorption spectrometer extinction pipe according to claim 1, is characterized in that: described body is curve-like or linearity contraction structure from the widest part to transition structure the most carefully.
3. gas phase molecular absorption spectrometer extinction pipe according to claim 1, is characterized in that: the section radius the most carefully located of described body is not less than 2mm.
4. gas phase molecular absorption spectrometer extinction pipe according to claim 1, is characterized in that: the two ends of described body are equipped with transparent lens sealing.
5. gas phase molecular absorption spectrometer extinction pipe according to claim 1, is characterized in that: the two ends sidewall of described body is respectively equipped with draft tube and escape pipe, described draft tube and escape pipe is equal and be provided with angle a between described body.
6. gas phase molecular absorption spectrometer extinction pipe according to claim 5, is characterized in that: the angular range of described angle a is 40 °-90 °.
7. gas phase molecular absorption spectrometer extinction pipe according to claim 5, is characterized in that: described body, draft tube and escape pipe are structure as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520782078.3U CN205138991U (en) | 2015-10-12 | 2015-10-12 | Gaseous phase molecule absorption spectrum appearance extinction pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520782078.3U CN205138991U (en) | 2015-10-12 | 2015-10-12 | Gaseous phase molecule absorption spectrum appearance extinction pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205138991U true CN205138991U (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520782078.3U Active CN205138991U (en) | 2015-10-12 | 2015-10-12 | Gaseous phase molecule absorption spectrum appearance extinction pipe |
Country Status (1)
| Country | Link |
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| CN (1) | CN205138991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211906A (en) * | 2018-10-19 | 2019-01-15 | 清华大学合肥公共安全研究院 | A kind of gas componant detection device |
-
2015
- 2015-10-12 CN CN201520782078.3U patent/CN205138991U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211906A (en) * | 2018-10-19 | 2019-01-15 | 清华大学合肥公共安全研究院 | A kind of gas componant detection device |
| CN112630218A (en) * | 2018-10-19 | 2021-04-09 | 清华大学合肥公共安全研究院 | Device for detecting gas components |
| CN112630218B (en) * | 2018-10-19 | 2023-12-05 | 清华大学合肥公共安全研究院 | Device for detecting gas component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |