CN206399778U - Light scattering method Atmospheric particulates detection device and its sheath gas gas circuit - Google Patents

Light scattering method Atmospheric particulates detection device and its sheath gas gas circuit Download PDF

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Publication number
CN206399778U
CN206399778U CN201621372300.3U CN201621372300U CN206399778U CN 206399778 U CN206399778 U CN 206399778U CN 201621372300 U CN201621372300 U CN 201621372300U CN 206399778 U CN206399778 U CN 206399778U
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China
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gas
sheath
atmospheric particulates
light scattering
circuit
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CN201621372300.3U
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刘保献
王莉华
张大伟
陈添
安欣欣
孙磊
姜南
马腾飞
王陈海
李海军
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BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENTER
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BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENTER
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Abstract

The utility model discloses a kind of light scattering method Atmospheric particulates detection device and its sheath gas gas circuit, belong to Atmospheric particulates testing equipment field, sheath gas gas circuit includes air inlet pipeline, the first connecting line, sampling pump and gas exhaust piping, one end of air inlet pipeline is used to flow into sample gas and sheath gas, the other end is used for the air inlet for connecting light room, air inlet pipeline includes the center air channel nested together and peripheral gas circuit, and center air channel is used to flow into for sample gas, and peripheral gas circuit is used to flow into for sheath gas;One end of first connecting line is used for the gas outlet for connecting light room, and the other end connects the air inlet of sampling pump;One end of gas exhaust piping connects the gas outlet of sampling pump, and the other end is used for the mixed gas for discharging sample gas and sheath gas.The utility model can avoid the particulate matter in sample gas from being deposited on light room inwall, so as to realize the protective effect to light room, it is ensured that detection accuracy, reduce operation maintenance workload, and the utility model is simple in construction, small volume, and operation and maintenance cost are low.

Description

Light scattering method Atmospheric particulates detection device and its sheath gas gas circuit
Technical field
The utility model is related to Atmospheric particulates testing equipment field, particularly relates to a kind of light scattering method airborne particulate quality testing Measurement equipment and its sheath gas gas circuit.
Background technology
Determining the method for Atmospheric particulates mass concentration both at home and abroad at present mainly has offline filter membrane weight method, and online β ray methods and micro oscillation sedimentation balance method etc..Filter membrane weight method is that internationally recognized Atmospheric particulates mass concentration detects base at present Quasi- method, it has the disadvantage time-consuming, laborious, poor in timeliness.β ray methods can be monitored in real time, automatically with micro oscillation sedimentation balance method, be had the disadvantage Production cost is high, equipment volume is big, is not suitable for outdoor flow measurement and intensive layouts.Dissipated based on the theoretical light of mie light scattering Penetrate particulate matter sensors because cost is low, low in energy consumption, the advantage such as miniaturization, maintenance be few, favored recently by people.
It is a light room based on the theoretical particulate matter detector of mie light scattering, its sensor is optical sensor, is examined Survey material is particulate matter, and particulate matter is easily attached to the positions such as laser head, detector window, light room inwall, causes detection accurate Property reduction.
The anti-pollution guarantor of light scattering method Atmospheric particulates portable detection equipment in the market mostly not to light room Shield measure.Equipment was run after a period of time, due to light room pollution, and testing result will increasingly be forbidden, and obtain accurate result, just Need to carry out cleaning light room, and clear up light room so that the operation expense of equipment is greatly increased.
Partial properties more superior light scattering method Atmospheric particulates detection device is designed with sheath gas, and its implementation is Differential sampling, its flow is controlled by controlling sample gas with the pressure differential of sheath gas.It is such a to be designed to realize the guarantor to light room Shield, reduces operation maintenance workload, but its structure is complex, equipment volume is larger, and to the requirement of each software and hardware of equipment compared with Height, cost is higher.
Utility model content
The utility model provides a kind of light scattering method Atmospheric particulates detection device and its sheath gas gas circuit, the utility model energy The particulate matter in sample gas is enough avoided to be deposited on light room inwall so that light room inwall can keep clean for a long time, so as to realize to light The protective effect of room, it is ensured that detection accuracy, reduces operation maintenance workload, and the utility model is simple in construction, small volume, Operation and maintenance cost are low.
In order to solve the above technical problems, the utility model offer technical scheme is as follows:
On the one hand, the utility model provides a kind of sheath gas gas circuit of light scattering method Atmospheric particulates detection device, including enters Air pipe, the first connecting line, sampling pump and gas exhaust piping, wherein:
One end of the air inlet pipeline is used to flow into sample gas and sheath gas, and the other end is used for the air inlet for connecting light room, described Air inlet pipeline includes the center air channel nested together and peripheral gas circuit, and the center air channel is used to flow into for sample gas, described outer Enclosing gas circuit is used for for the inflow of sheath gas;
One end of first connecting line is used for the gas outlet for connecting the light room, and the other end connects the sampling pump Air inlet;
One end of the gas exhaust piping connects the gas outlet of the sampling pump, and the other end is used to discharging the mixed of sample gas and sheath gas Close gas.
Further, it is provided with the first filter on first connecting line.
Further, in addition to the second connecting line, one end of second connecting line is connected with the gas exhaust piping, The other end is connected with the peripheral gas circuit.
Further, one end of second connecting line is connected with the side wall of the gas exhaust piping, and with the exhaust Pipeline connection, the other end is connected with the side wall of the peripheral gas circuit, and is connected with the peripheral gas circuit.
Further, it is provided with the second filter on second connecting line.
Further, it is located on the gas exhaust piping and is provided with first flow between the sampling pump and the second connecting line Sensor.
Further, it is located on second connecting line and is provided between second filter and the peripheral gas circuit Second flow sensor.
Further, it is located on the gas exhaust piping and is provided with first flow between the sampling pump and the second connecting line Controller.
Further, it is located on second connecting line and is provided between second filter and the peripheral gas circuit Second flow controller.
On the other hand, the utility model provides a kind of light scattering method Atmospheric particulates detection device, including light room and above-mentioned Light scattering method Atmospheric particulates detection device sheath gas gas circuit.
The utility model has the advantages that:
The sheath gas gas circuit of light scattering method Atmospheric particulates detection device of the present utility model is used cooperatively with light room, for examining The particulate matter of test sample gas.When in use, center air channel is connected with sample gas storage device, or center air channel is directly exposed to In air to be detected, extract air and be used as sample gas;Peripheral gas circuit is connected with sheath gas storage device or sheath gas generation equipment, sheath Gas generation equipment can be external equipment or the equipment integrated with sheath gas gas circuit of the present utility model.So After start sampling pump, in the presence of sampling pump, sample gas and sheath gas enter light room by air inlet pipeline, and sample gas is entered in light room Row detection, detects that the sample gas finished and sheath gas pass through sampling pump by the first connecting line, is discharged finally by gas exhaust piping.
In the utility model, because sample gas by center air channel enters light room, sheath gas enters light room, sheath by peripheral gas circuit Gas is wrapped in sample gas and together enters light room so that when sample gas enters light room detection, the clean sheath gas of the circle of outside parcel one, and sample gas is not Directly contacted with light room inwall, the particulate matter in sample gas is difficult to be deposited on light room inwall so that light room inwall can be kept for a long time Totally, so as to realize the protective effect to light room, it is ensured that detection accuracy, operation maintenance workload is reduced.
In summary, the sheath gas gas circuit of light scattering method Atmospheric particulates detection device of the present utility model can avoid sample gas In particulate matter be deposited on light room inwall so that light room inwall can keep clean for a long time, so as to realize that protection to light room is made With, it is ensured that detection accuracy, operation maintenance workload is reduced, and the utility model is simple in construction, small volume, operation and maintenance Cost is low.
Brief description of the drawings
Fig. 1 is the schematic diagram of the sheath gas gas circuit of light scattering method Atmospheric particulates detection device of the present utility model.
Embodiment
To make the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And specific embodiment is described in detail.
On the one hand, the utility model provides a kind of sheath gas gas circuit of light scattering method Atmospheric particulates detection device, such as Fig. 1 institutes Show, including air inlet pipeline 1, the first connecting line 2, sampling pump 3 and gas exhaust piping 4, wherein:
One end of air inlet pipeline 1 is used to flow into sample gas and sheath gas, and the other end is used for the air inlet for connecting light room 5, air inlet pipe Road 1 includes the center air channel 100 nested together and peripheral gas circuit 200, and center air channel 100 is used to flow into for sample gas 101, periphery Gas circuit 200 is used to flow into for sheath gas 201.
One end of first connecting line 2 is used for the gas outlet for connecting light room 5, and the other end connects the air inlet of sampling pump 3.
One end of gas exhaust piping 4 connects the gas outlet of sampling pump 3, and the other end is used for the mixed gas for discharging sample gas and sheath gas 301。
The sheath gas gas circuit of light scattering method Atmospheric particulates detection device of the present utility model is used cooperatively with light room, for examining The particulate matter of test sample gas.When in use, center air channel is connected with sample gas storage device, or center air channel is directly exposed to In air to be detected, extract air and be used as sample gas;Peripheral gas circuit is connected with sheath gas storage device or sheath gas generation equipment, sheath Gas generation equipment can be external equipment or the equipment integrated with sheath gas gas circuit of the present utility model.So After start sampling pump, in the presence of sampling pump, sample gas and sheath gas enter light room by air inlet pipeline, and sample gas is entered in light room Row detection, detects that the sample gas finished and sheath gas pass through sampling pump by the first connecting line, is discharged finally by gas exhaust piping.
In the utility model, because sample gas by center air channel enters light room, sheath gas enters light room, sheath by peripheral gas circuit Gas is wrapped in sample gas and together enters light room so that when sample gas enters light room detection, the clean sheath gas of the circle of outside parcel one, and sample gas is not Directly contacted with light room inwall, the particulate matter in sample gas is difficult to be deposited on light room inwall so that light room inwall can be kept for a long time Totally, so as to realize the protective effect to light room, it is ensured that detection accuracy, operation maintenance workload is reduced.
In summary, the sheath gas gas circuit of light scattering method Atmospheric particulates detection device of the present utility model can avoid sample gas In particulate matter be deposited on light room inwall so that light room inwall can keep clean for a long time, so as to realize that protection to light room is made With, it is ensured that detection accuracy, operation maintenance workload is reduced, and the utility model is simple in construction, small volume, operation and maintenance Cost is low.
In the utility model, in order to protect sampling pump, damage of the particulate matter in sample gas to sampling pump, the first connection are prevented The first filter 6 is provided with pipeline 2.
Improved as a kind of the of sheath gas gas circuit of light scattering method Atmospheric particulates detection device of the present utility model, Ke Yitong Shi Shixian generates the effect of sheath gas, specifically:Also include the second connecting line 7, one end of the second connecting line 7 and gas exhaust piping 4 connections, the other end is connected with peripheral gas circuit 200.
Because the mixed gas after detection have passed through the filtering of the first filter so that particulate matter therein greatly reduces, The mixed gas after filtering can be used as sheath gas, connected gas exhaust piping with peripheral gas circuit by the second connecting line .
The utility model uses the mixed gas after filtering as sheath gas, the circulation of gas is realized, without extra sheath Gas storage device or sheath gas generation equipment, simple and convenient, cost is lower.
Because mixed gas is the mixing of sheath gas and sample gas, its volume is more than the sheath air volume needed, therefore a part is mixed Gas needs discharge, and now, one end of the second connecting line 7 is connected with the side wall of gas exhaust piping 4, and is connected with gas exhaust piping 4, The other end is connected with the side wall of peripheral gas circuit 200, and is connected with peripheral gas circuit 200.So that the mixed gas after sampling pump It is divided into two-way, all the way after the second sample lines, enters peripheral pipeline as clean sheath gas, then parcel sample gas, and with Sample gas together enters light room;Another road discharge.
It is preferred that, in order that sheath gas it is cleaner, the second filter 8 is provided with the second connecting line 7.
If necessary to monitoring sampling flow, it can be located on gas exhaust piping 4 between the connecting line 7 of sampling pump 3 and second It is provided with first flow sensor 9.
If necessary to monitoring sheath throughput, the second filter 8 and peripheral gas circuit 12 can be located on the second connecting line 7 Between be provided with second flow sensor 10.
If necessary to control sampling flow and sheath throughput, flow sensor can be replaced by flow controller, that is, existed On gas exhaust piping 4 first flow controller 11 is provided between the connecting line 7 of sampling pump 5 and second.In the second connecting tube It is located on road 7 between second filter 8 and peripheral gas circuit 12 and is provided with second flow controller 12.
On the other hand, the utility model provides a kind of light scattering method Atmospheric particulates detection device, including light room 5 and above-mentioned Light scattering method Atmospheric particulates detection device sheath gas gas circuit.
Light scattering method Atmospheric particulates detection device of the present utility model can avoid the particulate matter in sample gas from being deposited on light Chamber interior walls so that light room inwall can keep clean for a long time, so as to realize the protective effect to light room, it is ensured that detection accuracy, Operation maintenance workload is reduced, and the utility model is simple in construction, small volume, and operation and maintenance cost are low.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art For personnel, on the premise of principle described in the utility model is not departed from, some improvements and modifications can also be made, these improvement Protection domain of the present utility model is also should be regarded as with retouching.

Claims (10)

1. the sheath gas gas circuit of a kind of light scattering method Atmospheric particulates detection device, it is characterised in that connect including air inlet pipeline, first Road, sampling pump and gas exhaust piping are taken over, wherein:
One end of the air inlet pipeline is used to flow into sample gas and sheath gas, and the other end is used for the air inlet for connecting light room, the air inlet Pipeline includes the center air channel nested together and peripheral gas circuit, and the center air channel is used to flow into for sample gas, the peripheral gas Road is used to flow into for sheath gas;
One end of first connecting line is used for the gas outlet for connecting the light room, and the other end connects the air inlet of the sampling pump Mouthful;
One end of the gas exhaust piping connects the gas outlet of the sampling pump, and the other end is used for the gaseous mixture for discharging sample gas and sheath gas Body.
2. the sheath gas gas circuit of light scattering method Atmospheric particulates detection device according to claim 1, it is characterised in that described The first filter is provided with first connecting line.
3. the sheath gas gas circuit of light scattering method Atmospheric particulates detection device according to claim 2, it is characterised in that also wrap The second connecting line is included, one end of second connecting line is connected with the gas exhaust piping, the other end and the peripheral gas circuit Connection.
4. the sheath gas gas circuit of light scattering method Atmospheric particulates detection device according to claim 3, it is characterised in that described One end of second connecting line is connected with the side wall of the gas exhaust piping, and is connected with the gas exhaust piping, the other end with it is described The side wall connection of peripheral gas circuit, and connected with the peripheral gas circuit.
5. the sheath gas gas circuit of the light scattering method Atmospheric particulates detection device according to claim 3 or 4, it is characterised in that The second filter is provided with second connecting line.
6. the sheath gas gas circuit of light scattering method Atmospheric particulates detection device according to claim 5, it is characterised in that described It is located on gas exhaust piping and first flow sensor is provided between the sampling pump and the second connecting line.
7. the sheath gas gas circuit of light scattering method Atmospheric particulates detection device according to claim 5, it is characterised in that described It is located on second connecting line and is provided with second flow sensor between second filter and the peripheral gas circuit.
8. the sheath gas gas circuit of light scattering method Atmospheric particulates detection device according to claim 5, it is characterised in that described It is located on gas exhaust piping and first flow controller is provided between the sampling pump and the second connecting line.
9. the sheath gas gas circuit of light scattering method Atmospheric particulates detection device according to claim 5, it is characterised in that described It is located on second connecting line and is provided with second flow controller between second filter and the peripheral gas circuit.
10. a kind of light scattering method Atmospheric particulates detection device, it is characterised in that including light room and any institutes of claim 1-9 The sheath gas gas circuit for the light scattering method Atmospheric particulates detection device stated.
CN201621372300.3U 2016-12-14 2016-12-14 Light scattering method Atmospheric particulates detection device and its sheath gas gas circuit Active CN206399778U (en)

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CN201621372300.3U CN206399778U (en) 2016-12-14 2016-12-14 Light scattering method Atmospheric particulates detection device and its sheath gas gas circuit

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Application Number Priority Date Filing Date Title
CN201621372300.3U CN206399778U (en) 2016-12-14 2016-12-14 Light scattering method Atmospheric particulates detection device and its sheath gas gas circuit

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108956405A (en) * 2018-09-21 2018-12-07 云南武易高速公路建设指挥部 A kind of engineering construction atmospheric environment dust monitoring method
CN109060621A (en) * 2018-09-21 2018-12-21 云南武易高速公路建设指挥部 A kind of monitoring device of powder-like waste for highway engineering
CN109060622A (en) * 2018-09-21 2018-12-21 云南武易高速公路建设指挥部 A kind of atmospheric environment lung particulate matter monitoring device for engineering construction
CN109238932A (en) * 2018-09-21 2019-01-18 中国科学院地质与地球物理研究所 A kind of highway engineering atmospheric environment lung particulate matter monitoring 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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108956405A (en) * 2018-09-21 2018-12-07 云南武易高速公路建设指挥部 A kind of engineering construction atmospheric environment dust monitoring method
CN109060621A (en) * 2018-09-21 2018-12-21 云南武易高速公路建设指挥部 A kind of monitoring device of powder-like waste for highway engineering
CN109060622A (en) * 2018-09-21 2018-12-21 云南武易高速公路建设指挥部 A kind of atmospheric environment lung particulate matter monitoring device for engineering construction
CN109238932A (en) * 2018-09-21 2019-01-18 中国科学院地质与地球物理研究所 A kind of highway engineering atmospheric environment lung particulate matter monitoring 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

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