CN103257108A - Sheath gas protection method and device for optical gas measurement instrument - Google Patents
Sheath gas protection method and device for optical gas measurement instrument Download PDFInfo
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- CN103257108A CN103257108A CN2013101605100A CN201310160510A CN103257108A CN 103257108 A CN103257108 A CN 103257108A CN 2013101605100 A CN2013101605100 A CN 2013101605100A CN 201310160510 A CN201310160510 A CN 201310160510A CN 103257108 A CN103257108 A CN 103257108A
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Abstract
The invention relates to an end face protection method of an optical unit of an optical measurement instrument and particularly relates to a sheath gas protection method and a protection device for a measurement instrument used for analyzing gas ingredients or gas suspended particles. The protection method comprises the following steps of: A. mounting a sheath gas device in front of the end face side of the optical unit, wherein the sheath gas device comprises a sheath gas spray head, and the sheath gas spray head is communicated with a sheath gas generating device through a sheath gas channel; and B. starting the sheath gas generating device, and the sheath gas flows out from the sheath gas spray head and flows by the end face of the optical unit to protect the optical unit. The protection method and device provided by the invention can not only protect the optical end face from being corroded and polluted by a sample gas and avoid the effect of the sheath gas on a measurement result, but also ensure simple structure and reduce the complexity and cost.
Description
Technical field
The present invention relates to the guard method of optical gauge optical unit end face, particularly the guard method of sheath gas and the device of the surveying instrument that gas componant or gas suspension particle are analyzed.
Background technology
[0002] carries out the instrument that gasmetry is analyzed by optical means, all can't avoid tested sample gas directly to contact with the optics end face of light incident, reception and delustring device usually., tested sample very easily the optics end face is caused that dewfall, burn into surface are sticky with etc. and has a strong impact on the consequence of optical characteristics if containing compositions such as high humility, high concentration corrosive gas or stickiness particle, gently then directly influence measurement result, heavy then cause instrument to completely lose use value.In addition, because the sudden change of gas circuit cross-sectional area causes moment expansion or the compression of tested sample gas, very easily form turbulent flow or turbulent flow at measuring chamber, also can cause the retention of sample gas for the measuring chamber of some special constructions, both can accelerate the optical side surface pollution corrosion in the measuring chamber, also can cause the measurement result data by peak clipping and phase delay, occur than mistake.Therefore at these extreme measuring objects, cleaning or the protective device of optics end face arranged usually.Be one of the most effective guard method by the sheath device of air that pure air retrains tested gas is set in tested gas periphery wherein.
Conventional sheath gas protection is to finish with clean gas (sheath gas) tested gas is wrapped up obstruct before tested gas enters measured zone, sheath gas and tested gas enter measured zone simultaneously and the while measured.Turbulent flow between sheath gas and the tested gas, turbulent flow, diffusion all can impact tested sample gas; sheath airshed and sample flow proportionate relationship change to the measurement result accuracy influence greatly; sheath device of air structure and control complexity that this sheath gas protected mode is required, cost is higher.So this type of sheath device of air is applied on the comparatively high-end instrument usually.
Summary of the invention
The invention provides the sheath gas guard method that a kind of new gas optical gauge is used, can not only protect the optics end face not by the sample gas corrosion contamination, avoid sheath gas itself to the influence of measurement result.
Following technical scheme is adopted in sheath gas provided by the invention guard method, and the sheath gas guard method that a kind of new gas optical gauge is used comprises the steps:
1, install the sheath device of air in optical unit end face side the place ahead, described sheath device of air comprises sheath gas blowout head, and described sheath gas blowout head is by sheath gas passage and the conducting of sheath gas generating means.
2, open sheath gas generating means, the sheath gas of process purified treatment flows out from sheath gas blowout head, flows through along the optical unit end face, and optical unit is formed protection.
Another kind of purpose of the present invention provides a kind of novel gas optical gauge sheath device of air, and is simple in structure, greatly reduces complexity and cost.
For realizing above-mentioned technical purpose; the technical solution adopted in the present invention is: the sheath device of air that a kind of new gas optical gauge is used; be equipped with optical unit in the surveying instrument; optical unit side the place ahead is provided with a sheath gas blowout mouth; sheath gas can flow through along the optical unit end face, and optical unit is formed protection.
Further, described optical unit front end is provided with the sheath gas hood, and optical unit is formed further protection.
Further, opposite side the place ahead, described optical unit end is provided with sheath conductance head piece, after sheath gas flows through along the optical unit end face, can enter sheath conductance head piece and discharge, and then optical unit is formed tighter protection.
The invention has the beneficial effects as follows, when protection optics end face is not by the sample gas corrosion contamination, avoided the influence of sheath gas self to measurement result fully, simple in structure, with low cost.
Description of drawings
Fig. 1 is the partial structurtes synoptic diagram of a preferred embodiment of the present invention.
Fig. 2 is the partial structurtes synoptic diagram of second preferred embodiment of the present invention.
Fig. 3 is the partial structurtes synoptic diagram of the 3rd preferred embodiment of the present invention.
Fig. 4 is the partial structurtes synoptic diagram of the 4th preferred embodiment of the present invention.
Fig. 5 is the principle of work synoptic diagram of the 5th preferred embodiment of the present invention.
Fig. 6 is the flow chart of steps of the inventive method.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1; in a preferred embodiment of the present invention; oil smoke to be measured (sample gas) 100 optical unit 10 of flowing through in the exhaust passage 60; optical unit 10 is positioned at a cavity 20; cavity left side in its end is provided with a sheath gas blowout mouth (outlet) 11; sidewall at cavity 20 offers sheath gas passage 12; utilize the pressure reduction of sheath gas blowout mouth 11 and exhaust passage 60; protected optical unit 10 end faces between the two are formed required sheath gas-bearing formation 13, and the sheath gas and the sample gas 100 that flow through optical unit 10 end faces are together discharged by exhaust passage 60.In the present invention, cavity 20 is nonessential.
Principle of the present invention be change conventional with sheath gas protected mode; namely adopt the clean gas parcel to intercept tested sample gas and prevent that it from polluting the method for optics end face; the position that utilizes all optics end faces in the gas optical gauge and easily cause the sample gas retention is usually all in the characteristics at measuring chamber edge; by at each protected optics end face and easily cause the position of sample gas retention to import micro-clean gas (being sheath gas) to form as thin as a wafer airflow layer (i.e. the local sheath gas-bearing formation of Fen Saning); and with sheath gas with the sample gas of finishing measurement under the suction function that sampling pump causes or direct short-circuit is discharged into outside the measuring chamber or direct short-circuit is discharged into measuring chamber; namely overflow between the pump drainage gas port of the cavity end window of sheath gas and measuring chamber without measurement point and short circuit; the diffusion of sheath gas can not have influence on the physicochemical property of the sample gas of measuring chamber inner light beam and sample gas intersection; so neither influence the measurement result of tested sample gas, protected the purpose of optics end face again.
Its guard method, step be as shown in Figure 6:
A, install the sheath device of air in optical unit end face side the place ahead, described sheath device of air comprises sheath gas blowout head, and described sheath gas blowout head is by sheath gas passage and the conducting of sheath gas generating means.
B, open sheath gas generating means, sheath gas flows out from sheath gas blowout head, flows through along the optical unit end face, and optical unit is formed protection.
Shown in Figure 2 is another preferred embodiment of the present invention, except sheath gas blowout mouth 11, also has sheath gas hood 14 in a side of optical unit 10 end faces above it, a through hole is arranged for light gas sheath on this sheath gas hood and passes through.Utilize the pressure reduction of 60 of sheath gas blowout mouth 11 and exhaust passages, make sheath gas in sheath gas hood 14, overflow, together discharge by exhaust passage 60 with sample gas 100.Sample gas can not enter sheath gas hood 14 substantially.
Shown in Figure 3 is the 3rd preferred embodiment of the present invention; on the basis of Fig. 1 embodiment, opened sheath conductance head piece 15 at cavity 20 opposite sides, after sheath gas flows through along the optical unit end face; can enter sheath conductance head piece 15 and discharge, then optical unit be formed tighter protection.
Shown in Figure 4 is the 4th preferred embodiment of the present invention, on the basis of Fig. 3 embodiment, has increased a sheath gas hood 14 above optical unit 10 end faces; Also can be described as on the basis of Fig. 2 embodiment, opened sheath conductance head piece 15 at cavity 20 opposite sides.Among this embodiment, the scope of activities of sheath gas is mainly between optical unit end face and sheath gas hood.
Fig. 5 is the principle of work synoptic diagram of the 5th preferred embodiment of the present invention.Its related optical gauge is an oil smoke concentration detecting instrument.This instrument roughly includes light source generator 81, measuring multiple parameters chamber 82, the delustring chamber 83 that is arranged in order; In light source generator 81 and the delustring chamber 83 optical component (optical unit) is arranged all; Be provided with oil smoke inlet channel 84 in measuring multiple parameters chamber 82, light path wherein crosses with the oil smoke tested sample gas 100 that enters through oil smoke passage 84.
When tested sample gas 100 through the measuring chamber 82 of flowing through, after crossing with incident ray through the incident light passage, 87 discharge from the exhaust passage, the optical signal sensor that the light signal that produces because of tested sample gas and incident ray is positioned at measuring chamber 82 inside receives, and enters delustring chamber 83 through the incident ray behind the joint through the emergent light passage.In the measuring chamber 82 a plurality of optical components and optical sensor may be arranged, all optical components, optical sensor and light incident and outgoing end face all can use sheath gas to carry out insulation blocking.At dissimilar measuring objects and measurement structure, can take different sheath gas occurring modes and sheath gas protected mode.In the present embodiment, for light source generator 81 and the optical component (optical unit) in the measuring chamber 82 have all been installed the sheath device of air.
In light source generator 81 parts; adopted sheath device of air shown in Figure 4; at first added the sheath gas hood in optical unit 85 the place aheads; secondly offered sheath gas passage respectively in optical unit 85 both sides; after flowing through along optical unit 85 end faces from the sheath gas-bearing formation of sheath air to open mouth ejection; entered sheath conductance head piece and discharged, this optical unit has been formed tight protection.
At a plurality of optical components and the optical sensor in the measuring chamber 82; adopted sheath device of air shown in Figure 1; sheath gas is from the sheath air to open mouth ejection of optical unit 82 1 sides; utilize the pressure reduction with the exhaust passage; protected each optical unit end face between the two is formed required sheath gas-bearing formation, and the sheath gas and the sample gas 100 that flow through protected each optical unit end face are together discharged by exhaust passage 87.
The gas of sheath gas generating means can derive from clean air, also can derive from the measurement gas of treated mistake.If derive from the measurement gas of treated mistake, then should comprise filtrator, can also increase air pump, to guarantee sheath gas certain flowing velocity and pressure differential are arranged.
Although the present invention is described to singularity to a certain degree, please understands current disclosure information and only adopt diagram.Under the situation of not deviation affects spiritual essence of the present invention and scope, when making and arranging the details of various parts, can take a series of change measure.
Claims (10)
1. the sheath gas guard method that the gas optical gauge is used comprises the steps:
A, install the sheath device of air in optical unit end face side the place ahead, described sheath device of air comprises sheath gas blowout head, and described sheath gas blowout head is by sheath gas passage and the conducting of sheath gas generating means;
B, open sheath gas generating means, sheath gas flows out from sheath gas blowout head, flows through along the optical unit end face, and optical unit is formed protection.
2. sheath gas according to claim 1 guard method is characterized in that, the sheath gas blowout head of described sheath device of air is located at optical unit end face side the place ahead, and sheath gas can flow through along the optical unit end face, and optical unit is formed protection.
3. sheath gas according to claim 2 guard method is characterized in that, described sheath device of air includes the sheath gas hood, and described sheath gas hood is located at optical unit end face top, and described sheath gas blowout head is located between described sheath gas hood and the optical unit end face; Described sheath gas can flow through along the optical unit end face, and overflows from the through hole of sheath gas hood, and optical unit is formed protection.
4. sheath gas according to claim 2 guard method; it is characterized in that; described sheath device of air also includes the sheath conductance head piece that arranges in opposite side the place ahead of described optical unit end; described sheath gas flows out from sheath gas blowout head; flow through along the optical unit end face; enter sheath conductance head piece and be exported, the optical unit end face is formed protection.
5. sheath gas according to claim 3 guard method is characterized in that, described sheath device of air also includes the sheath conductance head piece that arranges below the sheath gas hood, in opposite side the place ahead of described optical unit end; Described sheath gas flows out from sheath gas blowout head, flows through along the optical unit end face, enters sheath conductance head piece and is exported, and the optical unit end face is formed protection.
6. according to the guard method of the described sheath gas of above-mentioned arbitrary claim, it is characterized in that the sheath gas of described sheath gas generating means derives from through the outside air of filtration treatment or measured gas.
7. sheath gas according to claim 6 guard method is characterized in that, described sheath gas generating means includes filtrator and air pump.
8. the sheath device of air that the gas optical gauge is used is equipped with optical unit in the surveying instrument, it is characterized in that, optical unit side the place ahead is provided with a sheath gas blowout mouth, and sheath gas can flow through along the optical unit end face, and optical unit is formed protection.
9. sheath device of air according to claim 8 is characterized in that, described optical unit front end is provided with the sheath gas hood, and optical unit is formed further protection.
10. according to Claim 8 or 9 described sheath device of air, it is characterized in that described optical unit end face opposite side the place ahead is provided with sheath conductance head piece, after sheath gas flows through along the optical unit end face, enter sheath conductance head piece and discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101605100A CN103257108A (en) | 2013-05-06 | 2013-05-06 | Sheath gas protection method and device for optical gas measurement instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101605100A CN103257108A (en) | 2013-05-06 | 2013-05-06 | Sheath gas protection method and device for optical gas measurement instrument |
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| CN103257108A true CN103257108A (en) | 2013-08-21 |
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| CN2013101605100A Pending CN103257108A (en) | 2013-05-06 | 2013-05-06 | Sheath gas protection method and device for optical gas measurement instrument |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914024A (en) * | 2015-03-09 | 2015-09-16 | 浙江大学 | Particulate matter mass concentration detection device applied to atmosphere suspended particulate matters, and method thereof |
| CN105203676A (en) * | 2015-10-22 | 2015-12-30 | 杭州泰丽豪环保科技有限公司 | Hydrogen flame ionization detector suitable for high-pressure, high-temperature and high-humidity environments |
| CN107199142A (en) * | 2017-06-08 | 2017-09-26 | 北京东方昊为机器人系统有限公司 | It is a kind of to be used for splash particle environments, the equipment and instrument protector of pollution environment |
| CN109406352A (en) * | 2018-11-28 | 2019-03-01 | 苏州源慧达智能科技有限公司 | Light correlation oil smoke detection device with sheath gas shielded |
| CN109655388A (en) * | 2019-01-23 | 2019-04-19 | 北京雪迪龙科技股份有限公司 | Light scattering device, measuring concentration of granules in certain system and measurement method |
| CN110208166A (en) * | 2019-05-30 | 2019-09-06 | 上海镭慎光电科技有限公司 | The test method of sheath flow device performance |
| CN111307677A (en) * | 2019-11-22 | 2020-06-19 | 北京雪迪龙科技股份有限公司 | Laser front scattering particulate matter monitoring device |
| CN111735746A (en) * | 2020-06-10 | 2020-10-02 | 杭州明瑞智能检测科技有限公司 | Handheld oil smoke detector |
| CN112198095A (en) * | 2020-09-27 | 2021-01-08 | 山东诺方电子科技有限公司 | Particle sensor sheath gas protective structure |
| CN112924344A (en) * | 2021-01-22 | 2021-06-08 | 中煤科工集团重庆研究院有限公司 | Monitoring system and method for acquiring underground coal mine dust concentration based on image |
| CN113504166A (en) * | 2021-06-25 | 2021-10-15 | 青岛众瑞智能仪器股份有限公司 | Aerosol concentration detection method, device and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1409115A (en) * | 2001-09-29 | 2003-04-09 | 上海理工大学 | Monitor for smoke dust and smoke exhaust |
-
2013
- 2013-05-06 CN CN2013101605100A patent/CN103257108A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1409115A (en) * | 2001-09-29 | 2003-04-09 | 上海理工大学 | Monitor for smoke dust and smoke exhaust |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914024A (en) * | 2015-03-09 | 2015-09-16 | 浙江大学 | Particulate matter mass concentration detection device applied to atmosphere suspended particulate matters, and method thereof |
| CN105203676A (en) * | 2015-10-22 | 2015-12-30 | 杭州泰丽豪环保科技有限公司 | Hydrogen flame ionization detector suitable for high-pressure, high-temperature and high-humidity environments |
| CN107199142A (en) * | 2017-06-08 | 2017-09-26 | 北京东方昊为机器人系统有限公司 | It is a kind of to be used for splash particle environments, the equipment and instrument protector of pollution environment |
| CN109406352A (en) * | 2018-11-28 | 2019-03-01 | 苏州源慧达智能科技有限公司 | Light correlation oil smoke detection device with sheath gas shielded |
| CN109655388A (en) * | 2019-01-23 | 2019-04-19 | 北京雪迪龙科技股份有限公司 | Light scattering device, measuring concentration of granules in certain system and measurement method |
| CN110208166A (en) * | 2019-05-30 | 2019-09-06 | 上海镭慎光电科技有限公司 | The test method of sheath flow device performance |
| CN111307677A (en) * | 2019-11-22 | 2020-06-19 | 北京雪迪龙科技股份有限公司 | Laser front scattering particulate matter monitoring device |
| CN111735746A (en) * | 2020-06-10 | 2020-10-02 | 杭州明瑞智能检测科技有限公司 | Handheld oil smoke detector |
| CN112198095A (en) * | 2020-09-27 | 2021-01-08 | 山东诺方电子科技有限公司 | Particle sensor sheath gas protective structure |
| CN112198095B (en) * | 2020-09-27 | 2022-11-01 | 山东诺方电子科技有限公司 | Particle sensor sheath gas protective structure |
| CN112924344A (en) * | 2021-01-22 | 2021-06-08 | 中煤科工集团重庆研究院有限公司 | Monitoring system and method for acquiring underground coal mine dust concentration based on image |
| CN113504166A (en) * | 2021-06-25 | 2021-10-15 | 青岛众瑞智能仪器股份有限公司 | Aerosol concentration detection method, device and system |
| CN113504166B (en) * | 2021-06-25 | 2023-08-08 | 青岛众瑞智能仪器股份有限公司 | Aerosol concentration detection method, device and system |
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Application publication date: 20130821 |