CN103398878A - Passive air sampler - Google Patents
Passive air sampler Download PDFInfo
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- CN103398878A CN103398878A CN2013103567029A CN201310356702A CN103398878A CN 103398878 A CN103398878 A CN 103398878A CN 2013103567029 A CN2013103567029 A CN 2013103567029A CN 201310356702 A CN201310356702 A CN 201310356702A CN 103398878 A CN103398878 A CN 103398878A
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- adsorption cover
- adsorbent
- air sampler
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Abstract
The invention discloses a passive air sampler. An adsorption hood is covered on a main adsorbent box; a purification cavity is formed by enclosing of a through hole layer in the adsorption hood body, a porous protective cover and the inner wall of the lower part of the adsorption hood; an accommodating cavity for accommodating additional adsorbent is formed by enclosing of the through hole layer, a sealing cover and the inner wall of the upper part of the adsorption hood body. The invention also discloses another passive air sampler which comprises an adsorption hood which is used for covering a main adsorbent cage, wherein an accommodating cavity filled with additional adsorbent is formed among the adsorbent hood body and a porous inner drum connected in the adsorption hood body; the sealing cover is buckled on the adsorption hood body. In the transporting process, partial pollutant entering into the passive sampler can be adsorbed and purified by the additional adsorbent through a gap connected by the adsorption hood and a main adsorbent box or through a gap connected by the adsorption hood and the base, so that the pollution degree of the passive air sampler can be reduced to a great extent, and the sampling accuracy of the passive air sampler can be guaranteed as far as possible.
Description
Technical field
The present invention relates to the air detection technical field, more particularly, relate to a kind of passive type air sampler.
Background technology
Air sampler is divided into active sampling thief and passive type sampling thief.Active sampling thief is by asepwirator pump, air-flow measurement device and time set, make the air sample of certain volume at the uniform velocity flow through adsorbent in sampling thief, gas pollutant is concentrated to be adsorbed in adsorbent, then be used in conjunction with the instrument such as gas chromatograph, detect the gaseous contamination substrate concentration in detected surrounding air.
The passive type air sampler does not have asepwirator pump and air mass flow counter device, is within the sampling time of setting, and the adsorbent in the passive type air sampler is exposed in air, and the pollutant of a part of gas in air is adsorbed in adsorbent.Fixedly the time, the adsorbance of adsorbent is directly proportional to gaseous contamination substrate concentration in air in the sampling time; When the gaseous contamination substrate concentration was certain in air, adsorbance was directly proportional to the sampling time.Record the sampling time during use, be used in conjunction and can measure adsorbance with instruments such as gas chromatographs, again by with the various sampling times under, various normal concentration down-sampling detects the mass data obtain and compares, and just can detect the gaseous contamination substrate concentration that is detected in surrounding air.The passive type air sampler is widely used because of advantages such as volume are little, quality is light, simple and quick.
The passive type air sampler is normally given the client by modes such as mailing, and sends laboratory back to by same mode and analyze.In transmittance process, the environmental pollution situation in the packing of passive type air sampler or residing means of transport has just become uncontrollable factor.In case contaminated in transmittance process, the deviation that can not revise will appear in the sampled result of passive type air sampler.And the sealing means of existing passive type air sampler, no matter be aluminium foil bag sealing, plastics or glass sleeve seal, can sealing, is not absolutely gas-tight, and some pollutant still can infiltrate by gap, causes the passive type sampling thief to pollute.
Therefore, how to design a kind of passive type air sampler, this passive type air sampler can the contaminated degree of reduce passive type air sampler, thereby ensures as far as possible the accuracy of passive type air sampler sampling, is the critical problem that those skilled in the art need to be resolved hurrily.
Summary of the invention
The purpose of this invention is to provide a kind of passive type air sampler, this passive type air sampler can the contaminated degree of reduce passive type air sampler, thereby ensures as much as possible the accuracy of passive type air sampler sampling.
, for achieving the above object, the invention provides following technical scheme:
A kind of passive type air sampler, comprise main adsorbent box, be positioned at the main adsorbent of described main adsorbent box, openend at described main adsorbent box,, from close described main adsorbent to being disposed with the first separation net, control away from described main adsorbent apart from frame, keep out the wind layer and porous guard shield, also comprise:
Cover on described main adsorbent box, and the adsorption cover that removably connects with described main adsorbent box, described adsorption cover comprises:
The adsorption cover body;
Be connected in described adsorption cover body, and the inwall of described adsorption cover body is separated into the via layer of upper inside wall and lower inner wall, offer some through holes on described via layer, described via layer, described porous guard shield and described lower inner wall have surrounded the purification chamber;
Be fastened on the gland bonnet on described adsorption cover, described gland bonnet, described via layer and described upper inside wall have surrounded accommodating cavity;
Be contained in the additional adsorbent in described accommodating cavity.
Preferably, described via layer and the integrated formation of described adsorption cover body.
Preferably, described via layer is equipped with the second separation net near on the end face of described gland bonnet.
Preferably, described adsorption cover screws on described main adsorbent box.
The present invention also provides another kind of passive type air sampler, comprises
Base;
Be inserted into the main adsorbent cage in the blind hole of described base;
Be contained in the main adsorbent in described main adsorbent cage;
Cover the porous guard shield of described main adsorbent cage, be connected with the layer that keeps out the wind on the inwall of described porous guard shield,
Also comprise:
Cover the adsorption cover of described porous guard shield, described adsorption cover comprises:
The adsorption cover body,
Be connected in the intrinsic porous inner cylinder of described adsorption cover, formed accommodating cavity between described adsorption cover body and described porous inner cylinder, formed the purification chamber between described porous inner cylinder and described porous guard shield, offer some through holes on described porous inner cylinder, described adsorption cover body removably is connected on described base;
Be contained in the additional adsorbent in described accommodating cavity;
Be fastened on the gland bonnet on described adsorption cover body.
Preferably, described porous inner cylinder is connected in the end of close base on described adsorption cover body.
Preferably, described porous inner cylinder and the integrated formation of described adsorption cover body.
Preferably, described adsorption cover screws on described base.
Preferably, described porous inner cylinder is connected with separation net near on the surface of described additional adsorbent.
Can find out from technique scheme, the present invention is provided with additional adsorbent, in the process of transportation, the gap that is connected with main adsorbent box by adsorption cover, the part pollutant that the gap that perhaps by adsorption cover, with base, is connected enters into passive type air sampler inside can be added the adsorbent adsorption cleaning, thereby reduced to a great extent the contaminated degree of passive type air sampler, ensured as much as possible the accuracy of passive type air sampler sampling.
Description of drawings
In order to be illustrated more clearly in the scheme in the embodiment of the present invention, below will the accompanying drawing of embodiment or required use be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The wiring layout of the passive type air sampler that Fig. 1 provides for the specific embodiment of the invention;
The overall appearance schematic diagram of the passive type air sampler that provides in Fig. 1 is provided Fig. 2;
The wiring layout of the passive type air sampler that Fig. 3 provides for another specific embodiment of the present invention;
The overall appearance schematic diagram of the passive type air sampler that provides in Fig. 3 is provided Fig. 4.
Wherein, 10 for gland bonnet, 11 be main adsorbent box, 12 be main adsorbent, 13 be the first separation net, 14 for control apart from frame, 15 for the layer that keeps out the wind, 16 for the porous guard shield, 17 for the adsorption cover body, 171 for via layer, 172 for through hole, 18 be the second separation net, 19 for additional adsorbent, 20 for gland bonnet, 21 for base, 22 be that main adsorbent, 23 is that main adsorbent cage, 24 is the purification chamber for purifying chamber, 200 for additional adsorbent, 100 for adsorption cover body, 29 for separation net, 28 for through hole, 27 for porous inner cylinder, 261 for porous guard shield, 25 layer, 26 that keeps out the wind.
Embodiment
The invention discloses a kind passive type air sampler, this passive type air sampler can the contaminated degree of reduce passive type air sampler, thereby ensures as much as possible the accuracy of passive type air sampler sampling.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills obtain under the prerequisite of not making creative work all other embodiment, belong to the scope of protection of the invention.
Please refer to Fig. 1-Fig. 4.The wiring layout of the passive type sampling thief that Fig. 1 provides for the specific embodiment of the invention; The one-piece construction schematic diagram of the passive type sampling thief that Fig. 2 provides for the specific embodiment of the invention; The wiring layout of the passive type sampling thief that Fig. 3 provides for the specific embodiment of the invention; The one-piece construction schematic diagram of the passive type sampling thief that Fig. 4 provides for the specific embodiment of the invention.
In the present invention's one specific embodiment, the passive type air sampler comprise main adsorbent box 11, main adsorbent 12, the first separation net 13, control apart from frame 14, layer 15, porous guard shield 16 keep out the wind, also comprise adsorption cover, this adsorption cover comprises adsorption cover body 17, via layer 171, gland bonnet 10 and additional adsorbent 19.
Wherein, main adsorbent 12 is positioned at main adsorbent box 11, openend at main adsorbent 12, from near main adsorbent 12 to be disposed with away from main adsorbent 12 the first separation net 13, the control apart from frame 14, keep out the wind the layer 15, and porous guard shield 16, the effect of porous guard shield 16 is that the first separation net 13, control are pressed on the port of main adsorbent box 11 apart from frame 14 and the layer 15 that keeps out the wind.Control is to control the first separation net 13 and the distance between layer 15 of keeping out the wind apart from the effect of frame 14, the first separation net 13 and keep out the wind and formed the air layer that holds air between layer 15.
The via layer 171 that is connected in adsorption cover body 17 is divided into up and down two parts with the inwall of adsorption cover body 17, is respectively upper inside wall and lower inner wall.Offer some through holes 172 on via layer 171, via layer 171, porous guard shield 16 and lower inner wall have surrounded purification chamber 100.Gland bonnet 10 is fastened on adsorption cover body 17, and gland bonnet 10, via layer 171 and upper inside wall have surrounded accommodating cavity, and additional adsorbent 19 is positioned at this accommodating cavity.
During assembling, first fill additional adsorbent 19 on the via layer 171 of adsorption cover, and it is standby to build gland bonnet 10.Then, put into appropriate main adsorbent 12 in main adsorbent box 11, then put in order the first separation net 13, control apart from frame 14, the layer 15 that keeps out the wind, and porous guard shield 16 is pressed on above-mentioned material on main adsorbent box 11.Adsorption cover is covered on main adsorbent box 11 finally.
Be provided with additional adsorbent 19 in this embodiment, in the process of transportation, the gap that is connected with main adsorbent box 11 by adsorption cover enters into the interior part pollutant in passive type sampling thief purification chamber 100, after through hole 172, by additional adsorbent 19 adsorption cleanings, thereby reduced to a great extent the contaminated degree of passive type sampling thief, ensured as much as possible the accuracy of passive type sampling thief sampling.
Preferably, via layer 171 and the integrated formation of adsorption cover body 17 in above-mentioned.Strengthen like this stability of structure, improved the usability of passive type sampling thief.
In the present invention's one specific embodiment, also comprise the second separation net 18, this second separation net 18 is layed in via layer 171 near on the end face of gland bonnet 10, and the purpose of laying the second separation net 18 is to prevent that the additional adsorbent 19 on via layer 171 from leaking in purification chamber 100.
In the present invention's one specific embodiment, the adsorption cover in above-mentioned screws on main adsorbent box 11, is provided with internal thread on adsorption cover, is provided with the external thread adaptive with internal thread on main adsorbent box 11.Screw connection structure is simple, connection is reliable, mounting or dismounting are convenient.
When air is sampled, adsorption cover is screwed off from main adsorbent box 11, pollutant after the infiltration layer by layer of porous guard shield 16, keep out the wind layer 15, air layer, the first separation net 13, finally is adsorbed in main adsorbent 12.Sampling is tightened on adsorption cover on main adsorbent box 11 immediately, and records the sampling time after finishing.
In another specific embodiment of the present invention, the passive type air sampler comprises base 21, main adsorbent cage 23, main adsorbent 22, porous guard shield 24, also comprise adsorption cover, this adsorption cover comprises adsorption cover body 28, porous inner cylinder 26, gland bonnet 20 and additional adsorbent 29.
Wherein, main adsorbent 22 is arranged in main adsorbent cage 23, and main adsorbent cage 23 is inserted in blind hole on base 21, the outer porous guard shield 24 that is covered with of main adsorbent cage 23, be connected with the layer 25 that keeps out the wind on the inwall of this porous guard shield 24, and this porous guard shield 24 is connected on base 21.
Be connected between the interior porous inner cylinder 26 of adsorption cover body 28 and adsorption cover body 28 and formed the accommodating cavity that is used for holding additional adsorbent 29, formed purification chamber 200 between porous inner cylinder 26 and porous guard shield 24.Adsorption cover body 28 removably is connected on base 21, is provided with some through holes 261 on porous inner cylinder 26, and gland bonnet 20 is fastened on adsorption cover body 28, is used for the additional adsorbent 29 in the sealing accommodating cavity.
During assembling, first adsorption cover body 28 and porous inner cylinder 26 are connected as one, then fill additional adsorbent 29 in the upper direction accommodating cavity of adsorption cover body 28, and it is standby to build gland bonnet 20.Then, in the blind hole of filling in main adsorbent cage 23 inserted bases 21 of main adsorbent 22, and the porous guard shield 24 that installs the layer 25 that keeps out the wind is connected on base 21, main adsorbent cage 23 is covered.Finally adsorption cover is located on base 21.
Be provided with additional adsorbent 29 in this embodiment, in the process of transportation, the gap that is connected with base 21 by adsorption cover enters into the part pollutant in the purification chamber 200 of passive type air sampler, after through hole 261, by additional adsorbent 29 adsorption cleanings, thereby reduced to a great extent the contaminated degree of passive type air sampler, ensured as much as possible the accuracy of passive type air sampler sampling.
Preferably, porous inner cylinder 26 is connected in the end of close base 21 on adsorption cover body 28.Can increase as much as possible the volume of accommodating cavity like this, more additional adsorbent 29 is contained in accommodating cavity.
Preferably, porous inner cylinder 26 and the integrated formation of adsorption cover body 28 in above-mentioned.Strengthen like this stability of structure, improved the usability of passive type air sampler.
In the present invention's one specific embodiment, adsorption cover screws on base 21, is provided with external thread on adsorption cover body 28, is provided with the internal thread adaptive with this external thread on base 21.Screw connection structure is simple, connection is reliable, mounting or dismounting are convenient.
In the present invention's one specific embodiment, porous inner cylinder 26 is connected with separation net 27 on the surface near additional adsorbent 29.The purpose of separation net 27 is to prevent that the additional adsorbent 29 in accommodating cavity from leaking in purification chamber 200.
When air is sampled, adsorption cover is screwed off from main adsorbent box 21, pollutant after the infiltration layer by layer of porous guard shield 24, keep out the wind layer 25, air layer and main adsorbent cage 23, is adsorbed on main adsorbent 22.Sampling is tightened on adsorption cover on main adsorbent box 21 immediately, and records the sampling time after finishing.
, to the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. passive type air sampler, comprise main adsorbent box (11), be positioned at the main adsorbent (12) of described main adsorbent box (11), openend at described main adsorbent box (11), from near described main adsorbent (12) to be disposed with away from described main adsorbent (12) the first separation net (13), control apart from frame (14), layer (15) and a porous guard shield (16) keep out the wind, it is characterized in that, also comprise:
Cover on described main adsorbent box (11), and the adsorption cover that removably connects with described main adsorbent box (11), described adsorption cover comprises:
Adsorption cover body (17);
Be connected in described adsorption cover body (17), and the inwall of described adsorption cover body (17) is separated into the via layer (171) of upper inside wall and lower inner wall, offer some through holes (172) on described via layer (171), described via layer (171), described porous guard shield (16) and described lower inner wall have surrounded purification chamber (100);
Be fastened on the gland bonnet (10) on described adsorption cover body (17), described gland bonnet (10), described via layer (171) and described upper inside wall have surrounded accommodating cavity;
Be contained in the additional adsorbent (19) in described accommodating cavity.
2. passive type air sampler according to claim 1, is characterized in that, described via layer (171) and the integrated formation of described adsorption cover body (17).
3. passive type air sampler according to claim 1, is characterized in that, described via layer (171) is equipped with the second separation net (18) near on the end face of described gland bonnet (10).
4. passive type air sampler according to claim 1, is characterized in that, described adsorption cover screws on described main adsorbent box (11).
5. a passive type air sampler, comprise
Base (21);
Be inserted into the main adsorbent cage (23) in the blind hole of described base (21);
Be contained in the main adsorbent (22) in described main adsorbent cage (23);
Cover the porous guard shield (24) of described main adsorbent cage (23), be connected with the layer (25) that keeps out the wind on the inwall of described porous guard shield (24),
It is characterized in that, also comprise:
Cover the adsorption cover of described porous guard shield (24), described adsorption cover comprises:
Adsorption cover body (28);
Be connected in the porous inner cylinder (26) in described adsorption cover body (28), formed accommodating cavity between described adsorption cover body (28) and described porous inner cylinder (26), formed purification chamber (200) between described porous inner cylinder (26) and described porous guard shield (24), offer some through holes (261) on described porous inner cylinder (26), described adsorption cover body (28) removably is connected on described base (21);
Be contained in the additional adsorbent (29) in described accommodating cavity;
Be fastened on the gland bonnet (20) on described adsorption cover body (28).
6. passive type air sampler according to claim 5, is characterized in that, described porous inner cylinder (26) is connected in the upper end near base (21) of described adsorption cover body (28).
7. passive type air sampler according to claim 5, is characterized in that, described porous inner cylinder (26) and the integrated formation of described adsorption cover body (28).
8. passive type air sampler according to claim 5, is characterized in that, described adsorption cover screws on described base (21).
9. passive type air sampler according to claim 5, is characterized in that, described porous inner cylinder (26) is connected with separation net (27) near on the surface of described additional adsorbent (29).
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| CN103398878B CN103398878B (en) | 2015-08-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105115791A (en) * | 2015-09-16 | 2015-12-02 | 深圳市建筑科学研究院股份有限公司 | Passive type contaminant flux sampling device |
| CN106353426A (en) * | 2016-08-31 | 2017-01-25 | 科邦检测集团有限公司 | Badge type passive air sampler based on MCM-41 molecular sieve |
| CN106769235A (en) * | 2016-11-23 | 2017-05-31 | 厦门大学 | A kind of environmental contaminants time series concentration passive type sampling apparatus |
| CN107636441A (en) * | 2015-05-22 | 2018-01-26 | 欧洲行动有限公司 | Method for sampling and extracting contaminants in a fluid, sampling cannula for carrying out said method and sampling and extracting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107636441A (en) * | 2015-05-22 | 2018-01-26 | 欧洲行动有限公司 | Method for sampling and extracting contaminants in a fluid, sampling cannula for carrying out said method and sampling and extracting device |
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| CN106353426A (en) * | 2016-08-31 | 2017-01-25 | 科邦检测集团有限公司 | Badge type passive air sampler based on MCM-41 molecular sieve |
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|---|---|
| CN103398878B (en) | 2015-08-19 |
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