CN203132886U - Double-filter membrane active carbon box used for sampling Rn-Tn and daughter of Rn-Tn - Google Patents
Double-filter membrane active carbon box used for sampling Rn-Tn and daughter of Rn-Tn Download PDFInfo
- Publication number
- CN203132886U CN203132886U CN2012207473712U CN201220747371U CN203132886U CN 203132886 U CN203132886 U CN 203132886U CN 2012207473712 U CN2012207473712 U CN 2012207473712U CN 201220747371 U CN201220747371 U CN 201220747371U CN 203132886 U CN203132886 U CN 203132886U
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- Prior art keywords
- filter membrane
- ring
- cylindrical body
- pressure ring
- ring seal
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- 239000012528 membrane Substances 0.000 title claims abstract description 82
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000005070 sampling Methods 0.000 title abstract description 12
- 229910052799 carbon Inorganic materials 0.000 title abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 210000004907 gland Anatomy 0.000 claims description 16
- 230000000903 blocking effect Effects 0.000 abstract 4
- 239000012080 ambient air Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 239000000523 sample Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000003610 charcoal Substances 0.000 description 5
- 229910052704 radon Inorganic materials 0.000 description 5
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 description 5
- XQVKLMRIZCRVPO-UHFFFAOYSA-N 4-[(2-arsonophenyl)diazenyl]-3-hydroxynaphthalene-2,7-disulfonic acid Chemical compound C12=CC=C(S(O)(=O)=O)C=C2C=C(S(O)(=O)=O)C(O)=C1N=NC1=CC=CC=C1[As](O)(O)=O XQVKLMRIZCRVPO-UHFFFAOYSA-N 0.000 description 3
- 241000679125 Thoron Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a double-filter membrane active carbon box used for sampling Rn-Tn and daughter of the Rn-Tn. The active carbon is arranged in a cylindrical cavity of a cylindrical body, an annular blocking shoulder is correspondingly arranged at the peripheral wall of a cylindrical opening in each end of the cylindrical body, the inner side periphery of a wire mesh arranged at the outer side of the annular blocking shoulder is in contact with the outer side of the annular blocking shoulder, a filter membrane or a sealing ring in contact with the wire mesh is arranged at the outer side of the wire mesh, a pressing ring in contact with the filter membrane or the sealing ring is arranged at the outer side of the filter membrane or the sealing ring, the filter membrane is limited between the wire mesh and the sealing ring or between the sealing ring and the pressing ring, first internal threads of the pressing ring are matched with first external threads of a sealing cover, the pressing ring is installed on the cylindrical opening in each end of the cylindrical body and is driven by a fastening force generated by assembling the pressing ring with the cylindrical body so as to press the sealing ring or the filter membrane through the pressing ring, the sealing ring is in sealed contact with the filter membrane, the periphery of the wire mesh is pressed on the annular blocking shoulder through the filter membrane and the sealing ring, and the sealing cover is installed on the pressing ring through the threads and plugs a through hole formed by the pressing ring. The double-filter membrane active carbon box disclosed by the utility model is capable of conveniently and efficiently collecting the radgas Rn-Tn and daughter of the Rn-Tn in ambient air.
Description
Technical field
The utility model belongs to environmental monitoring technology, belongs to the device to radioactive radon in the air (Rn) and thoron (Tn) and daughter sampling thereof, the improvement of cleaning brush structure, particularly two filter membrane activated charcoals that Rn-Tn and daughter thereof are taken a sample.
Background technology
At the measurement of Rn in the surrounding air and Tn, according to the difference of measuring principle, use more method to mainly contain both at home and abroad: two filter membrane methods, scintillation chamber method, solid state nuclear track method, active carbon adsorption and semiconductor probe method.Close with this patent is two filter membrane methods and active carbon adsorption.Two filter membrane methods are at the entrance and exit place of decay tube a filter membrane to be set respectively, the 1st filter membrane is in order to remove airborne Rn-Tn daughter, make pure Rn-Tn flow into the decay tube with certain flow rate, the 2nd filter membrane is used for collecting the daughter of the pure Rn-Tn decay that enters the decay tube.Active carbon adsorption is that a kind of activated charcoal that utilizes has strong absorption property to each isotope of Rn, is used for improving the classical environment radon measurement method of surveying radon sensitivity.Two filter membrane methods and active carbon adsorption all are the single sampling at Rn-Tn gas or its daughter in the surrounding air, sampling when can not reach gas and daughter.In addition, active carbon adsorption adopts static absorption usually, and collection efficiency is low.
Solomon has developed the active sampling system of a kind of activated charcoal spiral pipe on the basis of the Φ 10cm activated charcoal method that Environmental Protection Agency (EPA) is released, but thoron concentration can not be measured by this system.In addition, because spiral pipe is very long, the radon that has adsorbed is difficult to resolve, and spiral pipe is not easy to make, and the power of air pump is also bigger, carries and uses all inconvenient.People such as the pass Zu Jie of Zhongshan University develop a kind of EPA Φ 10cm activated charcoal and the active sampling system to Rn-Tn and daughter thereof of filter membrane associating, filter membrane and activated charcoal independently are connected in series in this system, each assembly disperses, between filter membrane and activated charcoal, accompany drying tube, the Tn influence that this drying tube is short to the half life period in the environment and concentration is low is bigger, and bigger error is introduced in sampling and the meeting of measurement of Tn in the surrounding air.
Show that through the document comparative analysis bibliographical information has been seen in the relevant research that is used for the filter membrane activated charcoal of radon sampling both at home and abroad, but the research of the two filter membrane activated charcoals that are used for Rn-Tn and daughter sampling thereof identical with this patent structure does not appear in the newspapers.
The utility model content
The purpose of this utility model is to provide a kind of two filter membrane activated charcoals that Rn-Tn and daughter thereof are taken a sample, can be convenient, efficiently radgas Rn-Tn and daughter thereof in the surrounding air are collected.
The purpose of this utility model is achieved in that a kind of two filter membrane activated charcoals that Rn-Tn and daughter thereof are taken a sample, comprise the cylindrical body that the two ends nozzle all opens wide, equal paired wire gauzes, filter membrane, O-ring seal, pressure ring and gland bonnet, wire gauze, filter membrane and gland bonnet are all rounded, the cylindrical body tube is provided with activated charcoal in the chamber, every end nozzle perisporium correspondence of cylindrical body is arranging annular shoulder block, its inner peripheral of wire gauze of the arranged outside of annular shoulder block with contact in the outside of annular shoulder block towards cylindrical body one end nozzle, arranged outside at wire gauze has filter membrane or the O-ring seal that is in contact with it, the pressure ring that contacts filter membrane or O-ring seal in the outside of filter membrane or the arranged outside of O-ring seal, filter membrane by wire gauze and O-ring seal spacing between wire gauze and the O-ring seal or sealed circle and pressure ring spacing between O-ring seal and pressure ring, the sealed corral of interior all sides of O-ring seal or filter membrane and pressure ring is lived, and first internal thread that the through hole internal perisporium that pressure ring forms has matches with first external thread that gland bonnet has; Pressure ring is installed on every end nozzle of cylindrical body, assembled mutually and the fastening force that produces orders about pressure ring and presses and touch O-ring seal or filter membrane by pressure ring and cylindrical body, and make O-ring seal sealing contact filter membrane and by filter membrane and O-ring seal the wire gauze periphery is pressed and touch on annular shoulder block; The through hole that gland bonnet is installed on the pressure ring by screw thread and the shutoff pressure ring forms.
The utility model is hydrostatic column, mates with the detector probe size; Cylindrical shell two ends nozzle all has the filter membrane structure, and inner barrel is filled by activated charcoal.The filter membrane that the utlity model has is used for filtering the daughter of collecting air radgas Rn-Tn; Activated charcoal is used for the airborne radgas Rn-Tn of absorptive collection; Wire gauze is used for the fixedly activated carbon granule of cylindrical body, prevents that its shake is unrestrained and changes the position; Pressure ring is used for fixedly filter membrane and wire gauze; Gland bonnet and O-ring seal are used for the sealing to cylindrical body inside, prevent the interference of the Rn-Tn gas that adsorbs in the cylindrical body of radgas Rn-Tn in the ambient atmosphere.In active sampling process, when air-flow passed through cylindrical body tube chamber, the daughter of the radgas Rn-Tn in the surrounding air was collected by membrane filtration; Radgas Rn-Tn passes filter membrane and enters in the middle of the activated charcoal, and is collected by charcoal absorption.Activated charcoal is in absorption radgas Rn-Tn, and (two) filter membrane has also been realized the collection to the Rn-Tn daughter.
Cylindrical body internal diameter size is consistent with HPGe gamma detector external diameter, and the pressure ring internal diameter is a bit larger tham the detector external diameter, is convenient to cylindrical body one end nozzle and directly is placed on the detector and measures.Can reduce the distance of tubular vivo sample and detector like this, increase sample to the solid angle of detector, improve detection efficiency.
The beneficial effects of the utility model: the utility model is the sampler that active filter membrane is collected and charcoal absorption combines.Filter membrane is collected the daughter of radgas Rn-Tn, charcoal absorption Rn-Tn gas; Filter membrane and activated charcoal are compact to be connected, and has solved the sampling difficulty of Tn gas, has easily introduced the problem of error; Active pair of membrane filtration got rid of the interference of Rn-Tn daughter to charcoal absorption, solved the low problem of passive type charcoal absorption Rn-Tn gas efficiency; Activated charcoal has strong characterization of adsorption to Rn-Tn, has replaced the decay tube in two filter membrane methods, and device volume is little, in light weight, Portability is good.The utility model can be convenient, efficiently radgas Rn-Tn and daughter thereof in the surrounding air are collected.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the sectional structure synoptic diagram of the utility model first embodiment;
Fig. 2 is the sectional structure synoptic diagram of the utility model second embodiment.
Embodiment
A kind of two filter membrane activated charcoals that Rn-Tn and daughter thereof are taken a sample, as Fig. 1, shown in Figure 2, comprise the cylindrical body (7) that the two ends nozzle all opens wide, equal paired wire gauzes (1), filter membrane (2), O-ring seal (3), pressure ring (4) and gland bonnet (5), wire gauze (1), filter membrane (2) is all rounded with gland bonnet (5), cylindrical body (7) tube is provided with activated charcoal (8) in the chamber, every end nozzle perisporium correspondence of cylindrical body (7) is arranging annular shoulder block (6), its inner peripheral of wire gauze (1) of the arranged outside of annular shoulder block (6) with contact in the outside of annular shoulder block (6) towards cylindrical body (7) one end nozzles, arranged outside at wire gauze (1) has filter membrane (2) or the O-ring seal (3) that is in contact with it, in the outside of filter membrane (2) or the arranged outside of O-ring seal (3) the pressure ring (4) of contact filter membrane (2) or O-ring seal (3), filter membrane (2) by wire gauze (1) and O-ring seal (3) spacing between wire gauze (1) and the O-ring seal (3) or sealed circle (3) and pressure ring (4) spacing between O-ring seal (3) and pressure ring (4), O-ring seal (3) or filter membrane (2) surround with the sealed circle of interior all sides (3) of pressure ring (4), and first internal thread that the through hole internal perisporium that pressure ring (4) forms has matches with first external thread that gland bonnet (5) has; Pressure ring (4) is installed on every end nozzle of cylindrical body (7), assembled mutually and the fastening force that produces orders about pressure ring (4) and presses and touch O-ring seal (3) or filter membrane (2) by pressure ring (4) and cylindrical body (7), and make O-ring seal (3) sealing contact filter membrane (2) and by filter membrane (2) and O-ring seal (3) the peripheral pressure of wire gauze (1) is touched on annular shoulder block (6); Gland bonnet (5) is installed in the through hole that pressure ring (4) is gone up and shutoff pressure ring (4) forms by screw thread.
Cylindrical body (7) two ends nozzle periphery wall is arranging second external thread respectively, and first internal thread matches with second external thread, and pressure ring (4) is packed on every end nozzle of cylindrical body (7) by threaded engagement.
O-ring seal (3) or filter membrane (2) are arranged on interior all sides of pressure ring (4) and sealed circle (3) surrounds.
The utility model is made up of cylindrical body, pressure ring, gland bonnet, O-ring seal, wire gauze, filter membrane and activated charcoal.Before activated charcoal was packed cylindrical body tube chamber into, the interior heating of the baker 8h that puts it into 120 ℃ was dried desorb; Wire gauze network interface size is not changed in order to make the geometric configuration of activated charcoal in getting the process of filter membrane in the cylindrical body less than the activated carbon granule size, and the wire gauze of cylindrical body air inlet nozzle is fixed in the cylindrical body groove.
Put into filter membrane in the cylindrical body air inlet nozzle wire gauze outside, O-ring seal is put in the pressure ring inboard, with pressure ring filter membrane is compressed, and simultaneously gland bonnet is screwed in the pressure ring internal thread with sealing cylindrical body air inlet nozzle; Oven dry desorb processed active carbon is packed in the cylindrical body by the other end of cylindrical body; In cylindrical body is given vent to anger nozzle end groove, put into wire gauze, put into filter membrane in this wire gauze outside; O-ring seal is put in the pressure ring inboard, with pressure ring filter membrane and wire gauze is compressed, and simultaneously gland bonnet is screwed in the pressure ring internal thread with the nozzle of giving vent to anger of sealing cylindrical body; For fear of make cylindrical body the meet accident breakage or come off of the filter membrane of nozzle of giving vent to anger greatly owing to extraction flow, the wire gauze that adds diameter together in the outside of this filter membrane is in order to fixing filter membrane.
When compressing, make possibilities such as filter membrane deforms, distortion for fear of pressure ring, also filter membrane can be positioned between pressure ring and the O-ring seal.
Claims (3)
1. two filter membrane activated charcoals that Rn-Tn and daughter thereof are taken a sample, it is characterized in that: comprise the cylindrical body (7) that the two ends nozzle all opens wide, equal paired wire gauzes (1), filter membrane (2), O-ring seal (3), pressure ring (4) and gland bonnet (5), wire gauze (1), filter membrane (2) is all rounded with gland bonnet (5), cylindrical body (7) tube is provided with activated charcoal (8) in the chamber, every end nozzle perisporium correspondence of cylindrical body (7) is arranging annular shoulder block (6), its inner peripheral of wire gauze (1) of the arranged outside of annular shoulder block (6) with contact in the outside of annular shoulder block (6) towards cylindrical body (7) one end nozzles, arranged outside at wire gauze (1) has filter membrane (2) or the O-ring seal (3) that is in contact with it, in the outside of filter membrane (2) or the arranged outside of O-ring seal (3) the pressure ring (4) of contact filter membrane (2) or O-ring seal (3), filter membrane (2) by wire gauze (1) and O-ring seal (3) spacing between wire gauze (1) and the O-ring seal (3) or sealed circle (3) and pressure ring (4) spacing between O-ring seal (3) and pressure ring (4), O-ring seal (3) or filter membrane (2) surround with the sealed circle of interior all sides (3) of pressure ring (4), and first internal thread that the through hole internal perisporium that pressure ring (4) forms has matches with first external thread that gland bonnet (5) has; Pressure ring (4) is installed on every end nozzle of cylindrical body (7), assembled mutually and the fastening force that produces orders about pressure ring (4) and presses and touch O-ring seal (3) or filter membrane (2) by pressure ring (4) and cylindrical body (7), and make O-ring seal (3) sealing contact filter membrane (2) and by filter membrane (2) and O-ring seal (3) the peripheral pressure of wire gauze (1) is touched on annular shoulder block (6); Gland bonnet (5) is installed in the through hole that pressure ring (4) is gone up and shutoff pressure ring (4) forms by screw thread.
2. two filter membrane activated charcoals that Rn-Tn and daughter thereof are taken a sample according to claim 1, it is characterized in that: cylindrical body (7) two ends nozzle periphery wall is arranging second external thread respectively, first internal thread matches with second external thread, and pressure ring (4) is packed on every end nozzle of cylindrical body (7) by threaded engagement.
3. two filter membrane activated charcoals that Rn-Tn and daughter thereof are taken a sample according to claim 1, it is characterized in that: O-ring seal (3) or filter membrane (2) are arranged on interior all sides of pressure ring (4) and sealed circle (3) surrounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207473712U CN203132886U (en) | 2012-12-31 | 2012-12-31 | Double-filter membrane active carbon box used for sampling Rn-Tn and daughter of Rn-Tn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207473712U CN203132886U (en) | 2012-12-31 | 2012-12-31 | Double-filter membrane active carbon box used for sampling Rn-Tn and daughter of Rn-Tn |
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| Publication Number | Publication Date |
|---|---|
| CN203132886U true CN203132886U (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012207473712U Expired - Fee Related CN203132886U (en) | 2012-12-31 | 2012-12-31 | Double-filter membrane active carbon box used for sampling Rn-Tn and daughter of Rn-Tn |
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| CN (1) | CN203132886U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181400A (en) * | 2015-05-29 | 2015-12-23 | 福建拓普检测技术有限公司 | Sampling device |
| CN107607659A (en) * | 2017-11-10 | 2018-01-19 | 贵州大学 | A kind of improved gas chromatograph |
| CN108519255A (en) * | 2018-04-12 | 2018-09-11 | 福建拓普检测技术有限公司 | A kind of detection method for acquiring radon consistence in soil |
| CN109814144A (en) * | 2019-01-01 | 2019-05-28 | 中国人民解放军63653部队 | A kind of radon and radon daughter synchro measure and dosage rate evaluation method |
| DE102024104933B3 (en) | 2024-02-22 | 2025-02-27 | Bundesrepublik Deutschland (Bundesamt für Ausrüstung, Informationstechnik und Nutzung der Bundeswehr) | sampling pad |
-
2012
- 2012-12-31 CN CN2012207473712U patent/CN203132886U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181400A (en) * | 2015-05-29 | 2015-12-23 | 福建拓普检测技术有限公司 | Sampling device |
| CN105181400B (en) * | 2015-05-29 | 2018-05-11 | 福建拓普检测技术有限公司 | A kind of sampling apparatus |
| CN107607659A (en) * | 2017-11-10 | 2018-01-19 | 贵州大学 | A kind of improved gas chromatograph |
| CN107607659B (en) * | 2017-11-10 | 2024-02-06 | 贵州大学 | Improved meteorological chromatograph |
| CN108519255A (en) * | 2018-04-12 | 2018-09-11 | 福建拓普检测技术有限公司 | A kind of detection method for acquiring radon consistence in soil |
| CN109814144A (en) * | 2019-01-01 | 2019-05-28 | 中国人民解放军63653部队 | A kind of radon and radon daughter synchro measure and dosage rate evaluation method |
| DE102024104933B3 (en) | 2024-02-22 | 2025-02-27 | Bundesrepublik Deutschland (Bundesamt für Ausrüstung, Informationstechnik und Nutzung der Bundeswehr) | sampling pad |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20161231 |