CN101598800B - Method of uniformly mixing gases in measuring chamber of emanometer and device thereof - Google Patents

Method of uniformly mixing gases in measuring chamber of emanometer and device thereof Download PDF

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Publication number
CN101598800B
CN101598800B CN2009100439037A CN200910043903A CN101598800B CN 101598800 B CN101598800 B CN 101598800B CN 2009100439037 A CN2009100439037 A CN 2009100439037A CN 200910043903 A CN200910043903 A CN 200910043903A CN 101598800 B CN101598800 B CN 101598800B
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measuring chamber
cylindrical shell
gas
concentration
wireway
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CN101598800A (en
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谭延亮
肖田
周毅
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Hengyang Normal University
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Hengyang Normal University
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Abstract

The invention discloses a method for uniformly mixing gases in a measuring chamber of an emanometer and device thereof used for measuring concentration of +ADw-222+AD4-Rn/+ADw-220+AD4-Rn by a static collection method. The method includes: arranging a gas mixing device in the current measuring chamber and using the gas mixing device to mix the +ADw-222+AD4-Rn/+ADw-220+AD4-Rn in the measuring chamber uniformly to guarantee that the concentration of +ADw-222+AD4-Rn/+ADw-220+AD4-Rn in the measuring chamber is close to the oretical value+ADs- or, arranging more than three gas inlets/outlets on the bottom of the measuring chamber and cylindrical wall of the measuring chamber cylinder, wherein the gas inlets/outlets are communicated with the internal cavity of the measuring chamber cylinder,generating gas flow in the measuring chamber by using gases flow in/out from a plurality of gas inlets/outlets on the measuring chamber, thereby mixing the +ADw-222+AD4-Rn/+ADw-220+AD4-Rn uniformly under the function of gas flow and guaranteeing that the concentration of +ADw-222+AD4-Rn/+ADw-220+AD4-Rn in the measuring chamber is close to theoretical value.

Description

A kind of method and device that gas concentration in the emanometer measuring chamber is mixed
Technical field
The present invention relates to a kind of nuclear radiation detection technology, particularly a kind of electrostatic collection method that is used for is measured 222Rn/ 220Method that during Rn concentration gas concentration in the emanometer measuring chamber is mixed and device.
Background technology
Radon pumps into measuring chamber after falling daughter through membrane filtration in the air ambient, and measuring chamber is generally semisphere or cylindrical, and the alpha detection device is housed in the centre, between detector and measuring chamber, is added with the negative high voltage electric field of 50V-100V/cm.Radon in the measuring chamber is with the radon daughter of the newborn positively charged that decays, and it is collected into the surface of detector under the effect of electrostatic field, calculates radon concentration through the α particle measurement that radon daughter is emitted.Current RAD7 is to use electrostatic collection method emanometer device the most widely; The structure of its measuring chamber is as shown in Figure 1; It comprises the columniform cylindrical shell 1 of a sealing, and the top of cylindrical shell 1 is a plane, and the bottom of cylindrical shell 1 is an arc; On the cylindrical barrel of cylindrical shell 1, be provided with a gas inlet-outlet 3, be provided with a gas inlet-outlet 2 in the bottom of cylindrical shell 1.All 220Rn/ 222Rn measurement of concetration theoretical model is all thought 220Rn/ 222Rn is instantaneous even diffused in measuring chamber, and principle obtains thus 220Rn/ 222Rn concentration.Because 220The Rn half life period has only 55 seconds, and aerial diffusion length has only 2.9cm, for the big measuring chamber like RAD7, under slower flow velocity, be certain to occur the even phenomenon of density unevenness in the measuring chamber, and measuring chamber structure as shown in Figure 1 like this makes the gas outlet 220Rn concentration is higher than the mean concentration in the measuring chamber, promptly in the measuring chamber 220Rn concentration is lower than theoretical value.Some documents are mentioned, and utilize RAD7 to measure 220Rn concentration ratio reference value low 30%.Utilizing short time interval measurement to change at a high speed 222During Rn concentration, also can be owing to the bigger phenomenon of measured value deviation appears in this effect.For suppressing this effect, can adopt the method for dwindling the measuring chamber volume, but can cause detection efficiency to reduce, the result that statistic fluctuation increases.In general use the measuring chamber of larger volume still to have advantage.Also can adopt the method that improves sampling flow, can utilize turbulence effect to make in the measuring chamber 220Rn/ 222Rn mixes certainly, but this can make the measurement point air-flow take place than about-face again, also can produce big measuring error.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art and provide a kind of electrostatic collection method that is used for to measure 222Rn/ 220Method that during Rn concentration gas concentration in the emanometer measuring chamber is mixed and device.
Technical scheme of the present invention is: a kind of electrostatic collection method that is used for is measured 222Rn/ 220The method that during Rn concentration gas concentration in the emanometer measuring chamber is mixed, it is in existing measuring chamber, to establish a gas agitation mixing arrangement, utilizes the gas agitation mixing arrangement with in the measuring chamber 220Rn/ 222Rn mixes, and guarantees in the measuring chamber 220Rn/ 222Rn concentration is near theoretical value.
Another technical scheme of the present invention is: on the cylindrical barrel of the bottom of existing measuring chamber and measuring chamber cylindrical shell, establish the gas inlet-outlet more than three; Gas inlet-outlet communicates with the inner chamber of measuring chamber cylindrical shell; Utilize gas on measuring chamber a plurality of gas inlet-outlet flow to outflow; In measuring chamber, produce air-flow, thereby utilize the effect of air-flow to make in the measuring chamber 220Rn/ 222Rn mixes, and guarantees in the measuring chamber 220Rn/ 222Rn concentration is near theoretical value.
In order to make in the measuring chamber 220Rn/ 222It is more even that Rn mixes, in the above-mentioned measuring chamber that has a plurality of gas inlet-outlet, establish a gas agitation mixing arrangement, utilizes the gas agitation mixing arrangement with in the measuring chamber 220Rn/ 222Rn further mixes.
The present invention also provides a kind of electrostatic collection method that is used for to measure 222Rn/ 220The device that during Rn concentration gas concentration in the emanometer measuring chamber is mixed, its technical scheme is: a kind of employing electrostatic collection method is measured 220Rn/ 222The measuring chamber of Rn concentration; It comprises the columniform cylindrical shell of a sealing; The top of cylindrical shell is a plane, and the bottom of cylindrical shell is an arc, on the cylindrical barrel of cylindrical shell, is provided with a gas inlet-outlet; Be provided with a gas inlet-outlet in the bottom of cylindrical shell, two gas inlet-outlet communicate with the inner chamber of measuring chamber cylindrical shell.In order to make in the measuring chamber cylindrical shell 220Rn/ 222Rn concentration mixes, and the curved bottom in the measuring chamber cylindrical shell is provided with a gas agitation mixing arrangement.Described gas agitation mixing arrangement is that a hollow gas that is installed in measuring chamber cylindrical shell inner bottom part gas inlet-outlet mixes dish, and this hollow gas mixes dish and is made up of hollow air-guide disk that is installed in measuring chamber cylindrical shell inner bottom part and the wireway that is installed on the hollow air-guide disk.Wireway is the hollow tubular of a upper end closed lower ending opening, on the wireway tube wall, is provided with row's gas port.At the wireway that is provided with at least on the hollow air-guide disk more than two, the gas port on every wireway is arranged along a direction.
After air-flow gets into from the hollow air-guide disk; Get into wireway again; Eject with respect to air intake opening CW or counter clockwise direction then; Because the air-flow reacting force makes that be located at wireway on the hollow air-guide disk drives the hollow air-guide disk with respect to air intake opening counterclockwise or the CW rotation, make in the measuring chamber 220Rn/ 222Rn mixes.Wireway adopts insulating material, to reduce the influence to electrostatic field as far as possible.
Described gas agitation mixing arrangement also can be for being installed in the fan in the measuring chamber cylindrical shell.Utilize the wind-force of fan to mix to make in the measuring chamber cylindrical shell 220Rn/ 222Rn mixes.Fan blade is less, adopts insulating material, to reduce the influence to electrostatic field as far as possible.
The further technical scheme of the present invention is: a kind of employing electrostatic collection method is measured 220Rn/ 222The measuring chamber of Rn concentration; It comprises the columniform cylindrical shell of a sealing; The top of cylindrical shell is a plane, and the bottom of cylindrical shell is an arc, on the bottom of cylindrical shell and cylindrical barrel, is provided with the gas inlet-outlet more than three; Gas inlet-outlet communicates with the inner chamber of measuring chamber cylindrical shell, utilizes the air-flow effect to make in the measuring chamber 220Rn/ 222Rn mixes.
For the 220Rn/222Rn in the measuring chamber is further mixed, in measuring chamber, increased a gas agitation mixing arrangement.
The present invention compared with prior art has following characteristics: this measuring chamber has solved measurement 220Rn concentration and utilize short time interval measurement to change at a high speed 222During Rn concentration, because traditional measurement is indoor 220Rn/ 222The Rn density unevenness is even, makes the gas outlet 220Rn/ 222Mean concentration is inconsistent in Rn concentration and the measuring chamber, causes the bigger problem of measuring error.
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Description of drawings
Accompanying drawing 1 is measured for the existing electrostatic collection method that adopts 220Rn/ 222The measuring chamber structural representation of Rn concentration;
Accompanying drawing 2 mixes the measuring chamber structural representation of dish for band hollow gas provided by the invention;
Accompanying drawing 3 is the air-guide disk structural representation with two wireways;
Accompanying drawing 4 is the vertical view of accompanying drawing 3;
The measuring chamber structural representation that accompanying drawing 5 mixes for band fan provided by the invention;
Accompanying drawing 6 is many gas inlet-outlet measuring chamber structural representation provided by the invention.
Embodiment
Embodiment one, a kind of electrostatic collection method that is used for are measured 222Rn/ 220The method that during Rn concentration gas concentration in the emanometer measuring chamber is mixed, it is in measuring chamber, to establish a gas agitation mixing arrangement, utilizes the gas agitation mixing arrangement with in the measuring chamber 220Rn/ 222Rn mixes, and guarantees in the measuring chamber 220Rn/ 222Rn concentration is near theoretical value.
Its measuring chamber is shown in accompanying drawing 2, accompanying drawing 3, accompanying drawing 4; It comprises the columniform cylindrical shell 1 of a sealing; The top of cylindrical shell 1 is a plane, and the bottom of cylindrical shell 1 is an arc, on the cylindrical barrel of cylindrical shell 1, is provided with a gas inlet-outlet 3; Be provided with a gas inlet-outlet 2 in the bottom of cylindrical shell 1, gas inlet-outlet 3 communicates with the inner chamber of measuring chamber cylindrical shell 1 with gas inlet-outlet 2.In order to make in the measuring chamber cylindrical shell 1 220Rn/ 222Rn concentration mixes; In the gas inlet-outlet 2 of measuring chamber cylindrical shell 1 inner bottom part, be provided with a hollow gas and mix dish 4, this hollow gas mixes dish 4 and is made up of the hollow air-guide disk 4-1 that is installed in measuring chamber cylindrical shell 1 inner bottom part and two wireway 4-2 that are installed on the hollow air-guide disk 4-1.Wireway 4-2 is the hollow tubular of a upper end closed lower ending opening, on wireway 4-2 tube wall, is provided with row's gas port 4-2-1.Two wireway 4-2 are located on the same axis, and the gas port 4-2-1 on every wireway 4-2 arranges along a direction.
In the present embodiment, also three or four wireway 4-2 can be installed on hollow air-guide disk 4-1, three or four wireway 4-2 are distributed on the hollow air-guide disk 4-1, and the gas port 4-2-1 on every wireway 4-2 tube wall arranges along a direction.
Embodiment two, a kind of electrostatic collection method that is used for are measured 222Rn/ 220The method that during Rn concentration gas concentration in the emanometer measuring chamber is mixed, it is in measuring chamber, to establish a gas agitation mixing arrangement, utilizes the gas agitation mixing arrangement with in the measuring chamber 220Rn/ 222Rn mixes, and guarantees in the measuring chamber 220Rn/ 222Rn concentration is near theoretical value.
Its measuring chamber is shown in accompanying drawing 5; It comprises the columniform cylindrical shell 1 of a sealing; The top of cylindrical shell 1 is a plane, and the bottom of cylindrical shell 1 is an arc, on the cylindrical barrel of cylindrical shell 1, is provided with a gas inlet-outlet 3; Be provided with a gas inlet-outlet 2 in the bottom of cylindrical shell, gas inlet-outlet 3 communicates with the inner chamber of measuring chamber cylindrical shell 1 with gas inlet-outlet 2.In order to make in the measuring chamber cylindrical shell 1 220Rn/ 222Rn concentration mixes, and the curved bottom in the cylindrical shell 1 of measuring chamber is provided with a fan 5, utilizes the wind-force of fan 5 to mix and makes the 220Rn/222Rn in the measuring chamber cylindrical shell mix.Described fan 5 blades are less, adopt insulating material, to reduce the influence to electrostatic field as far as possible.
Embodiment three, a kind of electrostatic collection method that is used for are measured 222Rn/ 220The method that during Rn concentration gas concentration in the emanometer measuring chamber is mixed; On the cylindrical barrel of the bottom of measuring chamber and measuring chamber cylindrical shell, establish the gas inlet-outlet more than three; Gas inlet-outlet communicates with the inner chamber of measuring chamber cylindrical shell; Utilize gas on measuring chamber a plurality of gas inlet-outlet flow to outflow, in measuring chamber, produce air-flow, thereby utilize the effect of air-flow to make in the measuring chamber 220Rn/ 222Rn mixes, and guarantees in the measuring chamber 220Rn/ 222Rn concentration is near theoretical value.
Its measuring chamber is shown in accompanying drawing 6, and it comprises the columniform cylindrical shell 1 of a sealing, and the top of cylindrical shell 1 is a plane; The bottom of cylindrical shell 1 is an arc; Be provided with a gas inlet-outlet 2 in the bottom of cylindrical shell 1, on the cylindrical barrel of cylindrical shell 1, be provided with two exhaust body gateways, every row is provided with three gas inlet-outlet 3; Gas inlet-outlet 2, gas inlet-outlet 3 communicate with the inner chamber of measuring chamber cylindrical shell 1, utilize the air-flow effect to make in the measuring chamber 220Rn/ 222Rn mixes.
In order to make in the measuring chamber 220Rn/ 222Rn further mixes, and in the measuring chamber of present embodiment, increases a gas agitation mixing arrangement, and this gas agitation mixing arrangement can be that the hollow gas among the embodiment one mixes dish 4, also can be the fan 5 among the embodiment two.

Claims (2)

1. one kind is adopted the electrostatic collection method to measure 220Rn/ 222The measuring chamber of Rn concentration; It comprises the columniform cylindrical shell of a sealing, and the top of cylindrical shell is a plane, and the bottom of cylindrical shell is an arc; On the cylindrical barrel of cylindrical shell, be provided with a gas inlet-outlet; Be provided with a gas inlet-outlet in the bottom of cylindrical shell, two gas inlet-outlet communicate with the inner chamber of measuring chamber cylindrical shell, it is characterized in that: in order to make in the measuring chamber cylindrical shell 220Rn/ 222Rn concentration mixes, the curved bottom in the measuring chamber cylindrical shell is provided with a gas agitation mixing arrangement, utilizes the gas agitation mixing arrangement with in the measuring chamber 220Rn/ 222Rn mixes, and guarantees in the measuring chamber 220Rn/ 222Rn concentration is near theoretical value;
Described gas agitation mixing arrangement is that a hollow gas that is installed in measuring chamber cylindrical shell inner bottom part gas inlet-outlet mixes dish; This hollow gas mixes dish and is made up of hollow air-guide disk that is installed in measuring chamber cylindrical shell inner bottom part and the wireway that is installed on the hollow air-guide disk; Wireway is the hollow tubular of a upper end closed lower ending opening; On the wireway tube wall, be provided with row's gas port; At the wireway that is provided with at least on the hollow air-guide disk more than two, the gas port on every wireway is arranged along a direction.
2. one kind is adopted the electrostatic collection method to measure 220Rn/ 222The measuring chamber of Rn concentration; It comprises the columniform cylindrical shell of a sealing; The top of cylindrical shell is a plane, and the bottom of cylindrical shell is an arc, on the bottom of cylindrical shell and cylindrical barrel, is provided with the gas inlet-outlet more than three; Gas inlet-outlet communicates with the inner chamber of measuring chamber cylindrical shell, it is characterized in that: in order to make in the measuring chamber cylindrical shell 220Rn/ 222Rn concentration mixes, the curved bottom in the measuring chamber cylindrical shell is provided with a gas agitation mixing arrangement, utilizes the gas agitation mixing arrangement with in the measuring chamber 220Rn/ 222Rn mixes, and guarantees in the measuring chamber 220Rn/ 222Rn concentration is near theoretical value;
Described gas agitation mixing arrangement is that a hollow gas that is installed in measuring chamber cylindrical shell inner bottom part gas inlet-outlet mixes dish; This hollow gas mixes dish and is made up of hollow air-guide disk that is installed in measuring chamber cylindrical shell inner bottom part and the wireway that is installed on the hollow air-guide disk; Wireway is the hollow tubular of a upper end closed lower ending opening; On the wireway tube wall, be provided with row's gas port; At the wireway that is provided with at least on the hollow air-guide disk more than two, the gas port on every wireway is arranged along a direction.
CN2009100439037A 2009-07-10 2009-07-10 Method of uniformly mixing gases in measuring chamber of emanometer and device thereof Expired - Fee Related CN101598800B (en)

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CN101782655B (en) * 2010-03-19 2014-11-12 南华大学 Method and device for measuring radon exhalation rate in open loop way
CN101976085B (en) * 2010-11-17 2011-11-16 东华理工大学 Dynamic control method for radon concentration of multiple radon chambers with one source
SG10201810281TA (en) * 2014-05-27 2018-12-28 Fisher & Paykel Healthcare Ltd Gases mixing and measuring for a medical device
CN105510089A (en) * 2016-01-11 2016-04-20 南华大学 Radon collector with self-stirring and uniform gas extracting functions
CN105738937A (en) * 2016-04-29 2016-07-06 成都理工大学 Static alpha-cup multifunctional emanometer
CN110594346B (en) * 2019-09-09 2021-05-04 国网新疆电力有限公司乌鲁木齐供电公司 RFID radio frequency sensor
CN110907608A (en) * 2019-12-23 2020-03-24 广州环投花城环保能源有限公司 On-line monitoring system for explosive toxic gas in dangerous area

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2220075Y (en) * 1994-12-09 1996-02-14 北京市射线应用研究中心 Small radon continuous automatic monitor
CN201207026Y (en) * 2008-05-20 2009-03-11 东华理工大学 Radioactive aerosol generating and sampling apparatus in radon chamber
CN101407320A (en) * 2008-11-26 2009-04-15 湖南大学 Vertical reaction device for preparing nano carbon fibre in batch
CN201259553Y (en) * 2008-09-01 2009-06-17 上海市计量测试技术研究院 Box body for radon monitor automatic calibration apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2220075Y (en) * 1994-12-09 1996-02-14 北京市射线应用研究中心 Small radon continuous automatic monitor
CN201207026Y (en) * 2008-05-20 2009-03-11 东华理工大学 Radioactive aerosol generating and sampling apparatus in radon chamber
CN201259553Y (en) * 2008-09-01 2009-06-17 上海市计量测试技术研究院 Box body for radon monitor automatic calibration apparatus
CN101407320A (en) * 2008-11-26 2009-04-15 湖南大学 Vertical reaction device for preparing nano carbon fibre in batch

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
K.N.Yu et al..A simple and versatile 222Rn/220Rn exposure chamber.《Nuclear Instruments and Methods in Physics Research A》.2002,第481卷749-755. *

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