CN101221123A - Air chamber suitable for multiple gas detecting - Google Patents
Air chamber suitable for multiple gas detecting Download PDFInfo
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- CN101221123A CN101221123A CNA2008100522453A CN200810052245A CN101221123A CN 101221123 A CN101221123 A CN 101221123A CN A2008100522453 A CNA2008100522453 A CN A2008100522453A CN 200810052245 A CN200810052245 A CN 200810052245A CN 101221123 A CN101221123 A CN 101221123A
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- air chamber
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Abstract
A gas chamber suitable for detecting various gases includes a sleeve (2) and a gas inlet valve (3), a gas outlet valve (5) and a monitoring valve (4) which are arranged along the wall of the sleeve. The gas chamber is characterized in that the left and right ends of the sleeve (2) can be respectively provided with a connecting tray (12); the two connecting trays (12) are tightly fixed with the sleeve; each connecting tray is arranged on the sleeve (2) and provided with a flange tray (8); a C-lens (11) is fixedly in the connecting tray (12) by the flange tray (8); a lock ring (10) is added between the flange tray (8) and the C-lens (11); a test optical signal enters the gas chamber through the flange tray (8) and the C-lens (11); after fully absorbing gas in the gas chamber, the optical signal enters the C-lens (11) arranged on the connecting tray (12) at the other end of the sleeve (2) and receives; an emergent optical signal is transmitted out from a tail fiber of the C-lens (11) after passing through the flange tray (8). Compared with the original scheme of the gas chamber, the gas chamber has the advantages of simple and compact structure as well as high coupling efficiency.
Description
Technical field
The present invention relates to sensor and detection technique, especially relate to a kind of air chamber design field of gas sensor.
Background technology
For existing atmospheric pollution is effectively controlled, must monitor objectionable impurities in the atmosphere, so that understand source, distribution and the quantity of objectionable impurities.Along with the development of optical fiber sensing technology, increasing optical fiber sensing technology is used to the detection and the monitoring of gas.In the optical fiber gas sensing system, a wherein important air chamber that link is tested gas, the quality of air chamber design is directly connected to the sensitivity and the precision of optical fiber gas sensing.
At present, the patent of the air chamber that domestic relevant gas sensing uses has following patent, patent 200,480 002241.4 has been described a kind of design proposal of air chamber, contains the device of light source, catoptron and reception light in this scheme in the air chamber, is used for determining the concentration of gas and the existence of gas.In this patent, utilize reflector apparatus to come coupled light beam, make that like this angle of divergence of light beam is bigger, coupling efficiency for light beam, efficient is lower, and this makes receiving optical signals when handling, and can be flooded by the noise of system itself, finally can not detect the lower gas of concentration, just the precision of detected gas is not high enough.Therefore, air chamber design of the prior art has problems on usable range and signal testing precision, can not guarantee the high requirement of light signal coupling efficiency in air chamber, and whole air chamber structure is very complicated, is unfavorable for reducing cost and safeguarding.
Summary of the invention
In view of above-mentioned technical matters, the air chamber that has proposed a kind of suitable multiple gases detection of the present invention utilizes existing optical device to realize light signal coupling efficiently, improves the overall precision and the sensitivity of gas test.
The air chamber that a kind of suitable multiple gases detects comprises sleeve 2 and the gas admittance valve 3 that is provided with along sleeve wall, monitoring valve 4, air outlet valve 5, it is characterized in that:
Two ends, sleeve 2 left and right sides respectively are provided with 12, two terminal pads 12 of a terminal pad and are fastened together with sleeve by trip bolt 1 and trip bolt 6 respectively; Each terminal pad is positioned at and all is provided with ring flange 8 on the end face of sleeve 2 outsides and is fastened on the terminal pad 12 by trip bolt 7 and trip bolt 9, C-lens lens 11 are fixed in the terminal pad 12 by ring flange 8, are added with O-ring seal 10 between ring flange 8 and C-lens lens 11; Gas admittance valve 3 and air outlet valve 6 constitute the air admission hole and the venthole of whole air chamber, be provided with monitoring valve 4 between described gas admittance valve 3 and the air outlet valve 6, the test light signal enters in the air chamber by ring flange 8 and C-lens lens 11, light signal fully absorbs gas in air chamber after, arrive C-lens lens 11 places that are provided with on sleeve 2 other end terminal pads, receive by these lens; The emergent light signal transfers out through the tail optical fiber of ring flange 8 backs by C-lens lens 11.
Fixedly dependence screw 7 and screw 9 between described ring flange 8 and the terminal pad 12 respectively have two.
Described screw 1 or screw 6 have three.
Sleeve 2 adopts circular cylinder or square tube.
Be provided with monitoring valve 4 between gas admittance valve 3 and the air outlet valve 6,
Described monitoring valve 4, gas admittance valve 3 and air outlet valve 6 are installed on the sleeve 2 by interference fit.
The front end of described C-lens lens 11 is coated with anti-reflection film and corresponding tail optical fiber.
Described C-lens lens 11 adopt GRIN Lens, quasi globe lens or have the lens of alignment function.
The length of described sleeve 2 is at least more than the 200mm.
Light signal from about any end C-lens lens 11 tail optical fibers that are provided with of two terminal pads 12, left end or right-hand member incide in the air chamber, in air chamber, in air chamber, be full of mixed gas by gas admittance valve 3, after light beam is walked in air chamber and can fully be absorbed gas, C-lens lens 11 by the other end receive, and the optical signals tail optical fiber after the reception transfers out.
Patent of the present invention is compared with air chamber scheme in the past, has simple in structure, compactness and the high characteristics of coupling efficiency.Aspect economic benefit, patent of the present invention can be widely used in the context of detection of air monitoring and various tail gas and waste gas, and market outlook are good, has the good technical conversion base.Because patent of the present invention is our independent intellectual property right, has social benefit widely.
Description of drawings
Fig. 1 is the structure cut-open view of air chamber involved in the present invention.
Embodiment
Air chamber structure of the present invention comprises sleeve 2 and the gas admittance valve 3 that is provided with along sleeve wall, monitoring valve 4, air outlet valve 5 as shown in Figure 1.Sleeve 2 two ends respectively are provided with 12, two terminal pads 12 of a terminal pad and are fastened together by two trip bolts (being trip bolt 6 and gib screw 1) and sleeve respectively.
Member and their annexation set on two terminal pads 12 are identical, each terminal pad is positioned on the end face of sleeve 2 outsides and all is provided with ring flange 8, be fastened on the terminal pad 12 by gib screw 7 and gib screw 9, C-lens lens 11 are fixed in the terminal pad 12 by ring flange 8.
Gas admittance valve 3 and air outlet valve 6 constitute the air admission hole and the venthole of whole air chamber, and the test light signal enters in the air chamber by ring flange 8 and C-lens lens 11.Light signal arrives C-lens lens 11 places that are provided with on sleeve 2 other end terminal pads fully absorb gas in air chamber after, is received by these lens; The emergent light signal transfers out through the tail optical fiber of ring flange 8 backs by C-lens lens 11.
Fixedly dependence screw 7 and screw 9 between ring flange 8 and the terminal pad 12 realize, for guaranteeing reliably to be connected between ring flange 8 and the terminal pad 12, screw 7 and screw 9 respectively have two.
Being connected between terminal pad 12 and the sleeve 2 relies on screw 1 or screw 6, and for guaranteeing reliably to connect between the two, screw 1 or screw 6 have three.
The shape of sleeve 2 can be that cylinder also can be a square tube according to the environment for use difference.
Between ring flange 8 and C-lens lens 11, be added with O-ring seal 10, to prevent poisonous gas leakage.
For guaranteeing that the emission light of light signal between two C-lens lens 11 can lessly influence the signal coupling efficiency, when making C-lens lens 11, at the front end plating anti-reflection film and the corresponding tail optical fiber of C-lens lens 11.
The effect of C-lens lens 11 is transmitting optical signals and to make light signal be parallel beam, so this device also can be GRIN Lens, quasi globe lens and other have the lens of alignment function.
In order to improve the precision of gas detection, the length of sleeve 2 is at least more than the 200mm.
Preferred forms of the present invention is:
Air chamber structure figure as shown in Figure 1, the end (left end) of light signal from C-lens lens 11 tail optical fibers can be incided the air chamber, in air chamber, in air chamber, be full of mixed gas by gas admittance valve 3, after light beam is walked in air chamber and can fully be absorbed gas, by the other end-lens lens 11 receive, the optical signals tail optical fiber after the reception transfers out.
Claims (9)
1. the air chamber that suitable multiple gases detects comprises sleeve (2) and the gas admittance valve (3), the air outlet valve (5) that are provided with along sleeve wall, it is characterized in that:
Sleeve (2) two ends, the left and right sides respectively are provided with a terminal pad (12), and two terminal pads (12) pass through trip bolt respectively
(1) and trip bolt (6) and sleeve be fastened together; Each terminal pad is positioned at and all is provided with ring flange (8) on the outside end face of sleeve (2) and is fastened on the terminal pad (12) by trip bolt (7) and trip bolt (9), C-lens lens (11) are fixed in the terminal pad (12) by ring flange (8), are added with O-ring seal (10) between ring flange (8) and C-lens lens (11); Gas admittance valve (3) and air outlet valve (6) constitute the air admission hole and the venthole of whole air chamber, be provided with monitoring valve (4) between described gas admittance valve (3) and the air outlet valve (6), the test light signal enters in the air chamber by ring flange (8) and C-lens lens (11), light signal fully absorbs gas in air chamber after, arrive the C-lens lens (11) that are provided with on sleeve (2) other end terminal pad and locate, receive by these lens; The emergent light signal transfers out through the tail optical fiber of ring flange (8) back by C-lens lens (11).
2. the air chamber that suitable multiple gases as claimed in claim 1 detects is characterized in that fixedly dependence screw (7) and screw (9) between described ring flange (8) and the terminal pad (12) respectively have two.
3. the air chamber that suitable multiple gases as claimed in claim 1 detects is characterized in that described screw (1) or screw (6) have three.
4. the air chamber that suitable multiple gases as claimed in claim 1 detects is characterized in that described sleeve (2) adopts circular cylinder or square tube.
5. the air chamber that suitable multiple gases as claimed in claim 1 detects is characterized in that described monitoring valve (4), gas admittance valve (3) and air outlet valve (6) are installed on the sleeve (2) by interference fit.
6. the air chamber that suitable multiple gases as claimed in claim 1 detects is characterized in that the front end of described C-lens lens (11) is coated with anti-reflection film and corresponding tail optical fiber.
7. the air chamber that suitable multiple gases as claimed in claim 1 detects is characterized in that, described C-lens lens (11) adopt GRIN Lens, quasi globe lens or have the lens of alignment function.
8. the air chamber that suitable multiple gases as claimed in claim 1 detects is characterized in that the length of described sleeve (2) is at least more than the 200mm.
9. the air chamber that suitable multiple gases as claimed in claim 1 detects, it is characterized in that, described light signal from about any end C-lens lens (11) tail optical fiber that is provided with of two terminal pads (12), left end or right-hand member incide in the air chamber, in air chamber, in air chamber, be full of mixed gas by gas admittance valve (3), after light beam was walked in air chamber and can fully be absorbed gas, by C-lens lens (11) reception of the other end, the optical signals tail optical fiber after the reception transferred out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100522453A CN101221123A (en) | 2008-02-02 | 2008-02-02 | Air chamber suitable for multiple gas detecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100522453A CN101221123A (en) | 2008-02-02 | 2008-02-02 | Air chamber suitable for multiple gas detecting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101221123A true CN101221123A (en) | 2008-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100522453A Pending CN101221123A (en) | 2008-02-02 | 2008-02-02 | Air chamber suitable for multiple gas detecting |
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| CN (1) | CN101221123A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147356A (en) * | 2010-12-23 | 2011-08-10 | 大连艾科科技开发有限公司 | Gas chamber structure of gas detector and processing method thereof |
| CN102062722B (en) * | 2009-11-11 | 2012-09-05 | 中国科学院半导体研究所 | Laser program-controlled gas concentration detection system and detection method |
| CN104089884A (en) * | 2013-12-18 | 2014-10-08 | 力合科技（湖南）股份有限公司 | Optical front-end structure of gas analyzer |
| CN104458584A (en) * | 2014-12-16 | 2015-03-25 | 苏州谱道光电科技有限公司 | Sample chamber of sample analysis device |
| CN104483282A (en) * | 2014-12-31 | 2015-04-01 | 郑州光力科技股份有限公司 | Self-calibration gas chamber and optical fiber gas sensor detection system |
-
2008
- 2008-02-02 CN CNA2008100522453A patent/CN101221123A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062722B (en) * | 2009-11-11 | 2012-09-05 | 中国科学院半导体研究所 | Laser program-controlled gas concentration detection system and detection method |
| CN102147356A (en) * | 2010-12-23 | 2011-08-10 | 大连艾科科技开发有限公司 | Gas chamber structure of gas detector and processing method thereof |
| CN104089884A (en) * | 2013-12-18 | 2014-10-08 | 力合科技（湖南）股份有限公司 | Optical front-end structure of gas analyzer |
| CN104458584A (en) * | 2014-12-16 | 2015-03-25 | 苏州谱道光电科技有限公司 | Sample chamber of sample analysis device |
| CN104483282A (en) * | 2014-12-31 | 2015-04-01 | 郑州光力科技股份有限公司 | Self-calibration gas chamber and optical fiber gas sensor detection system |
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Open date: 20080716 |