CN202869931U - Atmospheric particulate on-line monitoring instrument detection module - Google Patents
Atmospheric particulate on-line monitoring instrument detection module Download PDFInfo
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- CN202869931U CN202869931U CN 201220399407 CN201220399407U CN202869931U CN 202869931 U CN202869931 U CN 202869931U CN 201220399407 CN201220399407 CN 201220399407 CN 201220399407 U CN201220399407 U CN 201220399407U CN 202869931 U CN202869931 U CN 202869931U
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Abstract
The utility model discloses an atmospheric particulate on-line monitoring instrument detection module, which comprises an air chamber, a base, a photomultiplier seat, a photomultiplier, a cable, a scintillator, a radioactive source and a radioactive source seat, wherein the outer side of an end window of the photomultiplier is in no-clearance fit with the scintillator; the other end of the photomultiplier is connected with the cable; one end, which is provided with the end window, of the photomultiplier is inserted into the photomultiplier seat; the photomultiplier seat is arranged in the air chamber; the radioactive source is fixed on the radioactive source seat; the radioactive source seat is inserted into the base; the air chamber is arranged above the base; and the end face of the radioactive source is coaxially parallel to the end window of the photomultiplier. The mass of particulates is calculated by detecting the number of beta particles penetrating through filter paper; the mass concentration of the atmospheric particulates can be accurately measured; the atmospheric particulate on-line monitoring instrument detection module can be used for measuring the atmospheric particulates in a closed environment; and therefore, a measurement result is relatively accurate and reliable, and the filter paper can be automatically replaced.
Description
Technical field
The utility model relates to a kind of enviromental monitoring equipment, relates in particular to a kind of detection module that detects the Atmospheric particulates mass concentration.
Background technology
Swift and violent increase along with socioeconomic fast development and vehicle guaranteeding organic quantity, marked change has occured in China's environmental air pollution feature, regional atmosphere polluting problem is on the rise, and the developed regions airborne particulate pollutes and is on the rise, and has become the following main trend of polluting development.Atmosphere PM2.5 wherein pollutes and not only causes visibility to reduce, and also is detrimental to health, and causes resident's circulation system disease and respiratory disease M ﹠ M to rise.For improving ambient air quality, protection health and ecologic environment, adapt to the needs of new period air quality management, Chinese Ministry of Environmental Protection has revised " ambient air quality " (GB3095-2012), lists PM2.5 in Air pollutant fundamental surveillance project.At present, can be divided into online detection and two kinds of methods of sampling detection to the detection of particulate in air.It is short, simple to operate, accurate degree height of test duration that on-line monitoring and sampling detect the advantage compare.Thereby the β particle generation current pulse signal that domestic existing PM2.5 on-line monitoring instrument adopts Geiger tube directly to receive by filter paper mostly sends amplification board to.Use Geiger tube to have certain advantage at cost in the monitor, but the detection sensitivity of Geiger tube is not high, when population is larger, produce easily signal overlap and cause measurement result accuracy to reduce, and for its supporting integral structure component, design difficulty is larger, and maintenance cost is higher.
The utility model content
The purpose of this utility model is as overcoming the defective of prior art, and a kind of detection module of Atmospheric particulates on-line monitoring instrument is provided, for detection of the mass concentration of Atmospheric Grains.
For achieving the above object, the utility model by the following technical solutions: a kind of Atmospheric particulates on-line monitoring instrument detection module comprises air chamber, base, photomultiplier transit base, photomultiplier, cable, scintillator, radioactive source and source holder; The end of described photomultiplier is side and the applying of scintillator gapless outside window, and the other end of this photomultiplier is connected with cable, and the end that photomultiplier is provided with the end window inserts in the photomultiplier transit base, and the photomultiplier transit base is installed in the air chamber; Described radioactive source is fixed on the source holder, in the source holder inserted base; Air chamber is placed on the base top, and makes the end face and the coaxial parallel placement of the end window of photomultiplier of radioactive source.
Furtherly, be provided with a rebound between described air chamber and base, the rebound center is provided with a circular hole, and four end positions of rebound are respectively equipped with at least one through hole, and the placement pipe box makes between air chamber and the base and keeps fixed range in the through hole.
Specifically, described fixed range is 15 millimeters.
Specifically, described rebound and base agree with the place and are provided with a sealing O type circle, and are provided with at least one spring between rebound and the base.
Furtherly, described air chamber both sides are equipped with a long depression bar and a short depression bar, and long depression bar is parallel fixing by universal driving shaft with short depression bar.
Furtherly, described scintillator bottom surface flushes with photomultiplier transit base bottom surface.
Furtherly, the distance of the end window of described photomultiplier and radioactive source end face is 15 millimeters.
Furtherly, described photomultiplier is installed on the photomultiplier transit pipe holder.
Specifically, described radioactive source is the C14 radioactive source.
Specifically, described source holder and base agree with the place and are provided with a sealing O type circle.
Compared with prior art, the beneficial effects of the utility model are: 1, the number of the β particle of the utility model by detect seeing through filter paper calculates the quality of particulate in air, can measure accurately the Atmospheric Grains mass concentration; 2, use the utility model in airtight environment, to measure Atmospheric Grains, make measurement result more accurately and reliably; 3, the utility model can realize automatically changing filter paper.
Description of drawings
Fig. 1 is the diagrammatic cross-section of the utility model preferred embodiment.
Fig. 2 is the overall schematic of the utility model preferred embodiment.
Fig. 3 is that the photomultiplier of the utility model preferred embodiment detects synoptic diagram.
Embodiment
In order to more fully understand technology contents of the present utility model, below in conjunction with specific embodiment the technical solution of the utility model is further introduced and explanation.
Embodiment
As shown in Figure 1, 2, be respectively diagrammatic cross-section and the overall schematic of the utility model preferred embodiment, Fig. 3 is that the photomultiplier of the utility model preferred embodiment detects synoptic diagram.
A kind of PM2.5 on-line monitoring instrument detection module comprises air chamber 11, base 8, photomultiplier transit base 2, photomultiplier transit pipe holder 12, photomultiplier 1, cable 10, scintillator 5, radioactive source 6, source holder 7, rebound 9, long depression bar 3 and short depression bar 13.Photomultiplier 1 one ends are connected with cable 10, the other end is provided with the end window, the end of photomultiplier 1 is side and the applying of scintillator 5 gaplesss outside window, described photomultiplier 1 is installed on the photomultiplier transit pipe holder 12 and will be provided with in the end insertion photomultiplier transit base 2 of end window, flush with photomultiplier transit base 2 bottom surfaces to scintillator 5 bottom surfaces, photomultiplier transit base 2 is installed in the air chamber 11.C14 radioactive source 6 usefulness fixed caps and two M3 socket head cap screws are fixed on the source holder 7, in source holder 7 inserted bases 8, and agreeing with the place at source holder 7 and base 8, to be provided with an external diameter be that 47.5 millimeters, thickness are that 2.65 millimeters sealing O type circle is to avoid gas leakage.Base 8 tops are placed rebound 9 and air chamber 11 successively, and the coaxial parallel and distance of the end face that makes C14 radioactive source 6 and the end window of photomultiplier 1 is 15 millimeters.Rebound 9 centers are provided with a circular hole, the β particle that C14 radioactive source 6 is radiated passes through, through hole on four end positions of rebound 9 is placed the aluminum pipe box, make between air chamber 11 and the base 8 to keep 15 millimeters distance, rebound 9 and base 8 agree with the place to be provided with an external diameter are that 41.2 millimeters, thickness are that 1.8 millimeters sealing O type circle is in case leak-stopping gas.Be provided with four symmetrical springs between rebound 9 and the base 8, the retractility of spring can move up and down rebound between air chamber 11 and base 8.The both sides of air chamber 11 are equipped with a long depression bar 3 and a short depression bar 13, wherein the length of long depression bar 3 is that 150 millimeters and two ends are equipped with bearing, the length of short depression bar 13 is 42 millimeters, parallel fixing by universal driving shaft between long depression bar 3 and the short depression bar 13, universal driving shaft plays the effect of lever simultaneously, and its length is 95 millimeters.As fulcrum, an end is done lever motion to long depression bar 3 under the acting force of cam with the coupling shaft place, and the other end then acts on the rebound 9, and short depression bar 13 is applied to rebound 9 other ends simultaneously, rebound 9 two ends stressed identical.When cam up turned, the bearing of short depression bar 13 1 ends made between rebound 9 and the air chamber 11 and forms the gap toward pressing down rebound 9, thereby filter paper can move freely replacing filter paper under the pulling of main drive shaft; When cam down turned, the bearing of short depression bar 13 1 ends left rebound 9, and rebound 9 compresses filter paper again under the acting force of spring.When measuring, air is entered by the air admission hole of air chamber 11, and then by filter paper, airborne particle is trapped within on the filter paper.C14 radioactive source 6 is stably launched the β particle, and the β number of particles was attenuated when the β particle had been held back the filter paper of particulate in air through one deck.Thereby the β particle by filter paper enters scintillator 5 and bump with scintillator 5 interior molecules and to produce the photon of specific wavelength, the photon number that produces is relevant with the β population that enters scintillator 5, then, photon is entered and is received by photomultiplier 1 by the end window of photomultiplier 1, each photon produces respectively a faint current pulse signal, and current pulse signal is transported to the signal amplification board and produces corresponding level signal.Processor incoming level signal is also recorded the light pulse that occurs in the per second, thereby detects the number by the β particle of filter paper, and obtains final detection result according to present flow rate.
More than be that the utility model Atmospheric particulates on-line monitoring instrument detection module is set forth; be used for helping to understand the utility model; but embodiment of the present utility model is not restricted to the described embodiments; anyly do not deviate from the change done under the utility model principle, modification, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (10)
1. an Atmospheric particulates on-line monitoring instrument detection module is characterized in that: comprise an air chamber (11), a photomultiplier (1), a photomultiplier transit base (2), a scintillator (5), a radioactive source, a source holder (7), a base (8) and a cable (10); The end of described photomultiplier (1) is side and the applying of scintillator (5) gapless outside window, and the other end of this photomultiplier (1) is connected with cable (10); The end that photomultiplier (1) is provided with the end window inserts in the photomultiplier transit base (2), and described photomultiplier transit base (2) is installed in the air chamber (11); Described radioactive source is fixed on the source holder (7), in source holder (7) inserted base (8); Described air chamber (11) is placed on base (8) top, and makes the end face of radioactive source coaxial parallel with the end window of photomultiplier (1).
2. described Atmospheric particulates on-line monitoring instrument detection module according to claim 1, it is characterized in that: be provided with a rebound (9) between described air chamber (11) and base (8), this rebound (9) center is provided with a circular hole, four end positions of rebound (9) are respectively equipped with at least one through hole, and the placement pipe box makes between air chamber (11) and the base (8) and keeps fixed range in the through hole.
3. described Atmospheric particulates on-line monitoring instrument detection module according to claim 2, it is characterized in that: described fixed range is 15 millimeters.
4. described Atmospheric particulates on-line monitoring instrument detection module according to claim 2, it is characterized in that: described rebound (9) agrees with the place with base (8) and is provided with a sealing O type circle, and is provided with at least one spring between rebound (9) and the base (8).
5. described Atmospheric particulates on-line monitoring instrument detection module according to claim 1, it is characterized in that: described air chamber (11) both sides are equipped with a long depression bar (3) and a short depression bar (13), and long depression bar (3) is fixed by universal driving shaft is parallel with short depression bar (13).
6. described Atmospheric particulates on-line monitoring instrument detection module according to claim 1, it is characterized in that: described scintillator (5) bottom surface flushes with photomultiplier transit base (2) bottom surface.
7. described Atmospheric particulates on-line monitoring instrument detection module according to claim 1, it is characterized in that: the end window of described photomultiplier and the distance of radioactive source end face are 15 millimeters.
8. described Atmospheric particulates on-line monitoring instrument detection module according to claim 1, it is characterized in that: described photomultiplier (1) is installed on the photomultiplier transit pipe holder (12).
9. described Atmospheric particulates on-line monitoring instrument detection module according to claim 1, it is characterized in that: described radioactive source is C14 radioactive source (6).
10. described Atmospheric particulates on-line monitoring instrument detection module according to claim 1, it is characterized in that: described source holder (7) is provided with a sealing O type circle with the place that agrees with of base (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220399407 CN202869931U (en) | 2012-08-13 | 2012-08-13 | Atmospheric particulate on-line monitoring instrument detection module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220399407 CN202869931U (en) | 2012-08-13 | 2012-08-13 | Atmospheric particulate on-line monitoring instrument detection module |
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| CN202869931U true CN202869931U (en) | 2013-04-10 |
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| CN 201220399407 Expired - Lifetime CN202869931U (en) | 2012-08-13 | 2012-08-13 | Atmospheric particulate on-line monitoring instrument detection module |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122180A (en) * | 2014-07-21 | 2014-10-29 | 青岛众瑞智能仪器有限公司 | Method for measuring mass concentration of particulate matter |
| CN105043822A (en) * | 2014-12-31 | 2015-11-11 | 江苏天瑞仪器股份有限公司 | Atmospheric particulates collection and measurement device |
| CN106783501A (en) * | 2016-12-21 | 2017-05-31 | 中国科学院高能物理研究所 | A kind of large scale photomultiplier waterproof encapsulation structure and method for packing |
| CN111024573A (en) * | 2019-12-30 | 2020-04-17 | 安徽安光环境科技有限公司 | Sampling and detecting device of β ray method atmospheric particulates monitor |
| CN111157432A (en) * | 2020-03-27 | 2020-05-15 | 山东罗丹尼分析仪器有限公司 | β ray analyzer for detecting particles by penetrating through warping plate |
| CN114486958A (en) * | 2022-01-11 | 2022-05-13 | 甘肃旭盛显示科技有限公司 | Glass partition paper impurity concentration detection device and detection method |
-
2012
- 2012-08-13 CN CN 201220399407 patent/CN202869931U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122180A (en) * | 2014-07-21 | 2014-10-29 | 青岛众瑞智能仪器有限公司 | Method for measuring mass concentration of particulate matter |
| CN105043822A (en) * | 2014-12-31 | 2015-11-11 | 江苏天瑞仪器股份有限公司 | Atmospheric particulates collection and measurement device |
| CN105043822B (en) * | 2014-12-31 | 2018-03-27 | 江苏天瑞仪器股份有限公司 | A kind of Atmospheric particulates gather measurement apparatus |
| CN106783501A (en) * | 2016-12-21 | 2017-05-31 | 中国科学院高能物理研究所 | A kind of large scale photomultiplier waterproof encapsulation structure and method for packing |
| CN106783501B (en) * | 2016-12-21 | 2018-07-03 | 中国科学院高能物理研究所 | A kind of large scale photomultiplier waterproof encapsulation structure and packaging method |
| CN111024573A (en) * | 2019-12-30 | 2020-04-17 | 安徽安光环境科技有限公司 | Sampling and detecting device of β ray method atmospheric particulates monitor |
| CN111157432A (en) * | 2020-03-27 | 2020-05-15 | 山东罗丹尼分析仪器有限公司 | β ray analyzer for detecting particles by penetrating through warping plate |
| CN114486958A (en) * | 2022-01-11 | 2022-05-13 | 甘肃旭盛显示科技有限公司 | Glass partition paper impurity concentration detection device and detection method |
| CN114486958B (en) * | 2022-01-11 | 2024-05-07 | 甘肃旭盛显示科技有限公司 | Device and method for detecting impurity concentration of glass spacer paper |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |