CN101975730A - Beta ray method PM10 on-line monitor sampling channel device - Google Patents
Beta ray method PM10 on-line monitor sampling channel device Download PDFInfo
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- CN101975730A CN101975730A CN2010105185059A CN201010518505A CN101975730A CN 101975730 A CN101975730 A CN 101975730A CN 2010105185059 A CN2010105185059 A CN 2010105185059A CN 201010518505 A CN201010518505 A CN 201010518505A CN 101975730 A CN101975730 A CN 101975730A
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Abstract
The invention discloses a beta ray method PM10 on-line monitor sampling channel device comprising a channel body (1), a sampling tube (4), a G-M geiger counter (7), filter paper (3) and a beta ray resource (5) for irradiating the filter paper (3), wherein the channel body (1) is provided with an airflow channel (8), gas enters and passes through the filter paper (3) from the sampling tube (4) and flows out of the airflow channel (8) on the lower part of the channel body, and the channel body (1) is provided with a counting channel; an upper opening is positioned in a gap (9), the G-M geiger counter (7) is positioned in the counting channel, and the centre line of the sampling tube (4) deviates from the centre line of the G-M geiger counter (7). The G-M geiger counter of the invention is not polluted by sampled airflow, is not affected by sampling current pressure, and has improved service life and improved counting efficiency.
Description
Technical field
The present invention relates to β rays method PM10 on-line monitoring instrument, especially β rays method PM10 on-line monitoring instrument sampling channel.
Background technology
β rays method PM10 on-line monitoring instrument is one of China's main monitoring instrument of measuring pellet in the atmosphere at present.In the β rays method PM10 on-line monitoring of domestic production at present, as shown in Figure 1, its G-M Geiger tube counter 7 be installed in sampling pipe 4 under, cause instrument in sampling process, the test surface of its counter is exposed in 16.7 liters/minute the air-flow always, so just accelerate the aging of counter and damaged, increased the pollution of counter test surface, had a strong impact on the detection efficiency and the life cycle of counter.
Summary of the invention
Purpose of the present invention be exactly solve β rays method PM10 on-line monitoring instrument because of G-M Geiger tube counter bit under sampling pipe, cause the aging of counter and damage, influenced the detection efficiency of counter and the problem of life cycle.
The technical solution used in the present invention is: a kind of β rays method PM10 on-line monitoring instrument sampling channel device, it comprises the passage body, sampling pipe, G-M Geiger tube counter, the beta ray source of filter paper and irradiation filter paper, described passage body is provided with gas channel, sampling pipe is positioned at gas channel, the passage body is provided with horizontal slit, described filter paper is positioned at the slit, the sampling pipe bottom is positioned at slit and filter paper top, gas enters from sampling pipe and passes filter paper and flow out from passage body lower stream of airflow passage, in the G-M Geiger tube counter particle on the filter paper is counted, it is characterized in that the described logical Capital Gymnasium is provided with counting channel, upper opening is positioned at the slit, G-M Geiger tube counter bit is in counting channel, the center line of sampling pipe departs from mutually with G-M Geiger tube counter center line, makes to fall into particle on the filter paper from sampling pipe and move to G-M Geiger tube counter top with filter paper and count.
Adopt technique scheme, because G-M Geiger tube counter no longer is positioned at air communication, the gas in the feasible gas channel of flowing through can not exert an influence to G-M Geiger tube counter.
For making things convenient for moving of filter paper, be provided with several rollers in the slit of the passage body under the filter paper, make things convenient for filter paper to move.
In sum, beneficial effect of the present invention is: 1, G-M Geiger tube counter is not sampled air stream contamination; 2, G-M Geiger tube counter is not subjected to the influence of sampling air flow pressure; 3, improved the life cycle of G-M Geiger tube counter; 4, improved the counting efficiency of G-M Geiger tube counter.
Description of drawings
Fig. 1 is existing β rays method PM10 on-line monitoring instrument sampling channel device.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is that B-B of Fig. 2 is to cut-open view.
Among the figure, 1, the passage body, 2, the filter paper holder, 3, filter paper, 4, sampling pipe, 5, beta ray source, 6, roller, 7, G-M Geiger tube counter, 8, gas channel.
Embodiment
Embodiment: a kind of β rays method PM10 on-line monitoring instrument sampling channel device, as Fig. 2, shown in Figure 3, it comprises the beta ray source 5 of passage body 1, sampling pipe 4, G-M Geiger tube counter 7, filter paper 3 and irradiation filter paper 3, passage body 1 is provided with gas channel 8, gas channel 8 is two through holes that vertically communicate, and the bottom of vertical through holes is provided with filter paper holder 2.Sampling pipe 4 is positioned at the upper air passage, passage body 1 is provided with horizontal slit 9, filter paper 3 is positioned at slit 9, sampling pipe 4 bottoms are positioned at slit 9 and filter paper 3 tops, gas enters from sampling pipe 4 and passes filter paper 3 from 8 outflows of passage body lower stream of airflow passage, in the G-M Geiger tube counter 7 particle on the filter paper 3 is counted, passage body 1 is provided with counting channel, upper opening is positioned at slit 9, G-M Geiger tube counter 7 is positioned at counting channel, the center line of sampling pipe 4 departs from mutually with G-M Geiger tube counter 7 center lines, makes to fall into particle on the filter paper 3 from sampling pipe 4 and move to G-M Geiger tube counter 7 tops with filter paper 3 and count.Be provided with the below that several rollers 6 are supported on filter paper 3 in the slit 9 of the passage body 1 under the filter paper 3, make things convenient for filter paper 3 to move.
Claims (2)
1. β rays method PM10 on-line monitoring instrument sampling channel device, it comprises passage body [1], sampling pipe [4], G-M Geiger tube counter [7], the beta ray source [5] of filter paper [3] and irradiation filter paper [3], described passage body [1] is provided with gas channel [8], sampling pipe [4] is positioned at the upper air passage, passage body [1] is provided with horizontal slit [9], described filter paper [3] is positioned at slit [9], sampling pipe [4] bottom is positioned at slit [9] and filter paper [3] top, gas enters from sampling pipe [4] and passes filter paper [3] and flow out from passage body lower stream of airflow passage [8], in the G-M Geiger tube counter [7] filter paper [3] being gone up particle counts, it is characterized in that described passage body [1] is provided with counting channel, upper opening is positioned at slit [9], G-M Geiger tube counter [7] is positioned at counting channel, the center line of sampling pipe [4] departs from mutually with G-M Geiger tube counter [7] center line, makes to fall into particle on the filter paper [3] from sampling pipe [4] and move to G-M Geiger tube counter [7] top with filter paper [3] and count.
2. β rays method PM10 on-line monitoring instrument sampling channel device according to claim 1 is characterized in that being provided with several rollers [6] in the slit [9] of the passage body [1] under the filter paper, makes things convenient for filter paper [3] to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105185059A CN101975730A (en) | 2010-10-25 | 2010-10-25 | Beta ray method PM10 on-line monitor sampling channel device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105185059A CN101975730A (en) | 2010-10-25 | 2010-10-25 | Beta ray method PM10 on-line monitor sampling channel device |
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| Publication Number | Publication Date |
|---|---|
| CN101975730A true CN101975730A (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105185059A Pending CN101975730A (en) | 2010-10-25 | 2010-10-25 | Beta ray method PM10 on-line monitor sampling channel device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091213A (en) * | 2011-10-27 | 2013-05-08 | 中国人民解放军海军核化安全研究所 | Roll type paper feeding and sampling apparatus for radioactive aerosol continuous monitor |
| CN103604732A (en) * | 2013-11-25 | 2014-02-26 | 中煤科工集团重庆研究院有限公司 | Dust collecting and measuring integrated mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4079628A (en) * | 1977-01-27 | 1978-03-21 | The United States Of America As Represented By The United States Department Of Energy | Mixed species radioiodine air sampling readout and dose assessment system |
| CN2424463Y (en) * | 2000-03-24 | 2001-03-21 | 中国科学院安徽光学精密机械研究所 | On-line measurer for content of breathable air dust |
| CN2548153Y (en) * | 2002-06-26 | 2003-04-30 | 张强 | Beta-ray continuous monitoring instrument for particle smoke discharge |
| CN101101256A (en) * | 2007-07-03 | 2008-01-09 | 武汉市天虹仪表有限责任公司 | Beta-ray soot concentration direct-reading monitor and method for determining effective sample |
| CN201828497U (en) * | 2010-10-25 | 2011-05-11 | 安徽蓝盾光电子股份有限公司 | Sampling channel device of PM10 on-line monitor adopting beta rays method |
-
2010
- 2010-10-25 CN CN2010105185059A patent/CN101975730A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4079628A (en) * | 1977-01-27 | 1978-03-21 | The United States Of America As Represented By The United States Department Of Energy | Mixed species radioiodine air sampling readout and dose assessment system |
| CN2424463Y (en) * | 2000-03-24 | 2001-03-21 | 中国科学院安徽光学精密机械研究所 | On-line measurer for content of breathable air dust |
| CN2548153Y (en) * | 2002-06-26 | 2003-04-30 | 张强 | Beta-ray continuous monitoring instrument for particle smoke discharge |
| CN101101256A (en) * | 2007-07-03 | 2008-01-09 | 武汉市天虹仪表有限责任公司 | Beta-ray soot concentration direct-reading monitor and method for determining effective sample |
| CN201828497U (en) * | 2010-10-25 | 2011-05-11 | 安徽蓝盾光电子股份有限公司 | Sampling channel device of PM10 on-line monitor adopting beta rays method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091213A (en) * | 2011-10-27 | 2013-05-08 | 中国人民解放军海军核化安全研究所 | Roll type paper feeding and sampling apparatus for radioactive aerosol continuous monitor |
| CN103604732A (en) * | 2013-11-25 | 2014-02-26 | 中煤科工集团重庆研究院有限公司 | Dust collecting and measuring integrated mechanism |
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Application publication date: 20110216 |