CN107702950A - A kind of iodine sampler and its method of work - Google Patents
A kind of iodine sampler and its method of work Download PDFInfo
- Publication number
- CN107702950A CN107702950A CN201710772774.XA CN201710772774A CN107702950A CN 107702950 A CN107702950 A CN 107702950A CN 201710772774 A CN201710772774 A CN 201710772774A CN 107702950 A CN107702950 A CN 107702950A
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- Prior art keywords
- valve
- iodine
- air blower
- flowmeter
- always
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
Abstract
The invention belongs to technical field of nuclear radiation protection, a kind of iodine sampler and its method of work are provided, the iodine sampler includes housing, iodine box, first pipeline, first valve, first flowmeter, second pipe, second valve, second flowmeter, air blower, the housing upper opening connects with ambient atmosphere, the filter paper for being used for gathering aerosol is provided with shell nozzle, one end of first pipeline connects with air blower, the other end is stretched into housing, first pipeline is provided with the first valve, first flowmeter is provided with the first valve, one end of the second pipe connects with air blower, the other end is stretched into housing and is connected with iodine box, the second pipe is provided with the second valve, second flowmeter is provided with the second valve.The aperture that the inventive method passes through the first valve of regulation and the second valve so that the gas flow for flowing through iodine box meets setting value.The present invention can effectively improve measurement accuracy.
Description
Technical field
The invention belongs to technical field of nuclear radiation protection, and in particular to a kind of iodine sampler and its method of work.
Background technology
With the development of technology, the application of nuclear technology is more and more extensive in the world, nuclear power station and nuclear equipment
Quantity cumulative year after year, the detection for radionuclide in air, more gradually occupies consequence in life.To reach detection
Purpose, it is necessary to first the radiant matter in environment is sampled, therefore, gathers and draws in air come accurate using which kind of method
The content of radiant matter is significant.
At present, conventional iodine sampler structure as shown in figure 1, including housing 10, iodine box 11, the first pipeline 15, valve 13,
Air blower 14, second pipe 12, after air blower 14 sucks air, the air of certain flow is from the second pipe 12 below iodine box
Into iodine box 11, remaining enters the first pipeline 15, the upper opening of housing 10, and opening is provided with the filter paper for being used for gathering aerosol.
Conventional iodine sampler calculates air by the content of iodine measured in the gas flow volume for flowing through iodine box and iodine box that measure
In radioactive substance it is whether exceeded.Therefore, if can accurately measure that to flow through the gas flow volume of iodine box be very
Crucial.
The valve 13 connected in the prior art on the second pipe 12 below iodine box is manually-operated gate, is needed manually opened with closing
Close, it is more troublesome.And simultaneously valveless, and its pipe diameter is larger, the second pipe being easily caused below iodine box on the first pipeline 15
Pressure is larger in 12, and especially when air inflow is big, situation becomes apparent, and the air pressure in two pipelines is different, can cause to flow through iodine
The flow of box is smaller not to reach flow setting value, leads to not accurately calculate the iodine concentration in air.
The content of the invention
The purpose of the present invention is exactly to overcome deficiency of the prior art, proposes a kind of iodine sampler and its work side
Method, can effectively solve pipeline air pressure of the existing iodine sampler below iodine box it is bigger than normal than another side admission line caused by
The problem of measuring atmospheric radiation thing concentration inaccuracy, improve measurement accuracy.
The purpose of the present invention is achieved through the following technical solutions.
A kind of iodine sampler, including housing, iodine box, the first pipeline, the first valve, first flowmeter, second pipe, second
Valve, second flowmeter, air blower, the housing upper opening connect with ambient atmosphere, are provided with shell nozzle and are used to gather
The filter paper of aerosol, one end of first pipeline are connected with air blower, and the other end is stretched into housing, are set on first pipeline
There is the first valve, first flowmeter is provided with the first valve, one end of the second pipe connects with air blower, and the other end is stretched
Enter in housing and be connected with iodine box, the second pipe is provided with the second valve, and second flowmeter is provided with the second valve.
The present invention also provides a kind of method of work of above-mentioned iodine sampler, comprises the following steps：
（1）Original state, set a flow value I by iodine box0, air blower is opened, the air that air blower keeps fixed enters
Tolerance, the first valve opening upper limit, the second valve opening lower limit；Setting value I needed for it0For the desired value being manually set, example
Such as, the flow for being expected that by iodine box now is 50, then I0=50；
（2）The instantaneous delivery I that second flowmeter record passes through the second valve2, the instantaneous stream of first flowmeter the first valve of record
Measure I1, because the air inlet amount that air blower holding is fixed, total flow I in two pipelinesAlwaysIt is constant, IAlways= I1+ I2, herein
Change the flow by iodine box under state, the second valve opening of regulation is adjusted to the upper limit from lower limit, in the process, such as second flow
Count the instantaneous delivery I of record2Setting value I needed for having reached0, that is, work as I2= I0When, stop control, and remain on；
（3）If the second valve opening upper limit is still without setting value I needed for reaching0, stop the control of the second valve, change first
The aperture of valve, now the pressure increase in the first pipeline, total flow I now’ AlwaysDiminish, adjust the rotating speed of air blower, make pipe
Total flow in road reach before total flow value I’ Always= IAlways, persistently change the aperture of the first valve, adjust turning for air blower
Speed, keep I’ Always=IAlways, it is required setting value i.e. I to adjust to the registration of second flowmeter2= I0Untill, operation terminates, and keeps transporting
OK；
（4）The aerosol of collection is attached on the filter paper above housing, and the iodine of collection is attached in iodine box, according to flow setting value
I0, calculate the concentration of now radioactive substance in air.
Iodine sampler of the present invention and its method of work can adjust the flow by iodine box under fixed total flow volume
Size, effectively solve to survey caused by pipeline air pressure of the existing iodine sampler below iodine box is bigger than normal than another side admission line
The problem of measuring atmospheric radiation thing concentration inaccuracy, by the accurate control to flow, improve measurement accuracy.
Brief description of the drawings
Fig. 1 is the structural representation of iodine sampler in the prior art.
Wherein：Housing 10, iodine box 11, second pipe 12, valve 13, air blower 14, the first pipeline 15.
Fig. 2 is the structural representation of iodine sampler in the present invention.
Wherein：Housing 1, iodine box 2, second pipe 3, the second valve 4, second flowmeter 5, air blower 6, the first valve 7, the
Flow meters 8, the first pipeline 9.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
As shown in Fig. 2 the embodiments of the invention provide a kind of iodine sampler, including housing 1, iodine box 2, the first pipeline 9,
One valve 7, first flowmeter 8, second pipe 3, the second valve 4, second flowmeter 5, air blower 6, the upper opening of housing 1
Connected with ambient atmosphere, the filter paper for being used for gathering aerosol, one end of first pipeline 9 and air blower are provided with shell nozzle
6 connections, the other end are stretched into housing 1, and first pipeline 9 is provided with the first valve 7, are provided with the first valve 7 first-class
Gauge 8, one end of the second pipe 3 are connected with air blower 6, and the other end is stretched into housing 1 and is connected with iodine box 2, and described the
Two pipelines 3 are provided with the second valve 4, and second flowmeter 5 is provided with the second valve 4.
The present embodiment also provides a kind of method of work of above-mentioned iodine sampler, comprises the following steps：
（1）Original state, set a flow value I by iodine box 20, air blower 6 is opened, air blower 6 keeps fixed air
Air inflow, the aperture upper limit of the first valve 7, the aperture lower limit of the second valve 4；Setting value I needed for it0For the target being manually set
Value, for example, the flow for being expected that by iodine box now is 50, then I0=50；
（2）The instantaneous delivery I that the record of second flowmeter 5 passes through the second valve 42, the wink of the first valve 7 of record of first flowmeter 8
Shi Liuliang I1, because air blower 6 keeps fixed air inlet amount, total flow I in two pipelinesAlwaysIt is constant, IAlways= I1+
I2, changing the flow by iodine box 2 in this case, the regulation aperture of the second valve 4 is adjusted to the upper limit from lower limit, in the process,
The instantaneous delivery I recorded such as second flowmeter 52Setting value I needed for having reached0, that is, work as I2= I0When, stop control, and keep transporting
OK；
（3）If the aperture upper limit of the second valve 4 is still without setting value I needed for reaching0, stop the control of the second valve, change the
The aperture of one valve 7, now the pressure increase in the first pipeline 9, total flow I now’ AlwaysDiminish, adjustment air blower 6 turns
Speed, make the total flow in pipeline reach before total flow value I’ Always= IAlways, persistently change the aperture of the first valve 7, adjust air blast
The rotating speed of machine 6, keep I’ Always=IAlways, it is required setting value i.e. I to adjust to the registration of second flowmeter 52= I0Untill, operation terminates,
And remain on；
（4）The aerosol of collection is attached on the filter paper above housing, and the iodine of collection is attached in iodine box, according to flow setting value
I0, calculate the concentration of now radioactive substance in air.This step is conventional steps.
In the above-described embodiments, first valve 7, the second valve 4 and air blower 6 are connected with PID controller, pass through
PID (proportional-integral derivative controller) can automatically control the aperture of two valves and the rotating speed of air blower, so as to control iodine box
Flow reach required setting value, it is not necessary to manual operation controls the size of flow.
The content not being described in detail in this specification, belong to prior art known to those skilled in the art.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (3)
1. a kind of iodine sampler, it is characterized in that：Including housing, iodine box, the first pipeline, the first valve, first flowmeter, the second pipe
Road, the second valve, second flowmeter, air blower, the housing upper opening connect with ambient atmosphere, are provided with and use at shell nozzle
In the filter paper of collection aerosol, one end of first pipeline is connected with air blower, and the other end is stretched into housing, first pipe
Road is provided with the first valve, and first flowmeter is provided with the first valve, and one end of the second pipe connects with air blower, separately
One end is stretched into housing and is connected with iodine box, and the second pipe is provided with the second valve, and second is provided with the second valve
Gauge.
A kind of 2. method of work of iodine sampler as claimed in claim 1, it is characterized in that this method comprises the following steps：
（1）Original state, set a flow value I by iodine box0, air blower is opened, air blower keeps fixed air inlet
Amount, the first valve opening upper limit, the second valve opening lower limit；Setting value I needed for it0For the desired value being manually set；
（2）The instantaneous delivery I that second flowmeter record passes through the second valve2, the instantaneous delivery of first flowmeter the first valve of record
I1, because the air inlet amount that air blower holding is fixed, total flow I in two pipelinesAlwaysIt is constant, IAlways= I1+ I2, in this shape
Change the flow by iodine box under state, the second valve opening of regulation is adjusted to the upper limit from lower limit, in the process, such as second flowmeter
The instantaneous delivery I of record2Setting value I needed for having reached0, that is, work as I2= I0When, stop control, and remain on；
（3）If the second valve opening upper limit is still without setting value I needed for reaching0, stop the control of the second valve, change first
The aperture of valve, now the pressure increase in the first pipeline, total flow I now’ AlwaysDiminish, adjust the rotating speed of air blower, make pipe
Total flow in road reach before total flow value I’ Always= IAlways, persistently change the aperture of the first valve, adjust turning for air blower
Speed, keep I’ Always=IAlways, it is required setting value i.e. I to adjust to the registration of second flowmeter2= I0Untill, operation terminates, and keeps transporting
OK；
（4）The aerosol of collection is attached on the filter paper above housing, and the iodine of collection is attached in iodine box, according to flow setting value
I0, calculate the concentration of now radioactive substance in air.
3. the method for work of iodine sampler according to claim 2, it is characterized in that：First valve, the second valve and
Air blower is connected with PID controller, by the flow of PID controller remote auto control iodine box, reaches required setting value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710772774.XA CN107702950B (en) | 2017-08-31 | 2017-08-31 | Working method of iodine sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710772774.XA CN107702950B (en) | 2017-08-31 | 2017-08-31 | Working method of iodine sampler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107702950A true CN107702950A (en) | 2018-02-16 |
| CN107702950B CN107702950B (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710772774.XA Active CN107702950B (en) | 2017-08-31 | 2017-08-31 | Working method of iodine sampler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752751A (en) * | 2019-01-23 | 2019-05-14 | 成都理工大学 | In air131I dynamic equilibrium monitoring device and monitoring method |
| CN111220428A (en) * | 2020-02-25 | 2020-06-02 | 中国辐射防护研究院 | Multi-channel test device for sampling radioactive aerosol and gaseous iodine |
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|---|---|---|---|---|
| CN2231798Y (en) * | 1994-07-30 | 1996-07-24 | 上海仪器仪表成套厂吴县分厂 | Sampler for radiation monitoring system |
| JP2599979B2 (en) * | 1988-10-25 | 1997-04-16 | 三菱電機株式会社 | Iodine measuring device |
| CN101769832A (en) * | 2010-01-29 | 2010-07-07 | 武汉东湖天康科技有限公司 | Radiation environment iodine automatic sampling device |
| CN101825529A (en) * | 2010-01-29 | 2010-09-08 | 武汉东湖天康科技有限公司 | Integrated super-flow automatic sampler |
| CN201637649U (en) * | 2010-04-15 | 2010-11-17 | 武汉市天虹仪表有限责任公司 | Measuring instrument for atmospheric particulate matter |
| CN103063483A (en) * | 2013-01-10 | 2013-04-24 | 厦门大学 | Sampling device for mercury in atmosphere |
| CN103076208A (en) * | 2013-01-08 | 2013-05-01 | 中国工程物理研究院核物理与化学研究所 | Automatic sampling system for radioactive gas-carrying discharge substances |
| CN203824807U (en) * | 2013-12-23 | 2014-09-10 | 上海新漫传感技术研究发展有限公司 | Portable type iodine sampling device |
| CN105842016A (en) * | 2016-06-02 | 2016-08-10 | 阳江核电有限公司 | Portable radioactive gas sampling device |
| CN205808479U (en) * | 2016-06-16 | 2016-12-14 | 北京放射性核素实验室 | V cone flow meter system for sampling ultrahigh flow aerosol |
-
2017
- 2017-08-31 CN CN201710772774.XA patent/CN107702950B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2599979B2 (en) * | 1988-10-25 | 1997-04-16 | 三菱電機株式会社 | Iodine measuring device |
| CN2231798Y (en) * | 1994-07-30 | 1996-07-24 | 上海仪器仪表成套厂吴县分厂 | Sampler for radiation monitoring system |
| CN101769832A (en) * | 2010-01-29 | 2010-07-07 | 武汉东湖天康科技有限公司 | Radiation environment iodine automatic sampling device |
| CN101825529A (en) * | 2010-01-29 | 2010-09-08 | 武汉东湖天康科技有限公司 | Integrated super-flow automatic sampler |
| CN201637649U (en) * | 2010-04-15 | 2010-11-17 | 武汉市天虹仪表有限责任公司 | Measuring instrument for atmospheric particulate matter |
| CN103076208A (en) * | 2013-01-08 | 2013-05-01 | 中国工程物理研究院核物理与化学研究所 | Automatic sampling system for radioactive gas-carrying discharge substances |
| CN103063483A (en) * | 2013-01-10 | 2013-04-24 | 厦门大学 | Sampling device for mercury in atmosphere |
| CN203824807U (en) * | 2013-12-23 | 2014-09-10 | 上海新漫传感技术研究发展有限公司 | Portable type iodine sampling device |
| CN105842016A (en) * | 2016-06-02 | 2016-08-10 | 阳江核电有限公司 | Portable radioactive gas sampling device |
| CN205808479U (en) * | 2016-06-16 | 2016-12-14 | 北京放射性核素实验室 | V cone flow meter system for sampling ultrahigh flow aerosol |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752751A (en) * | 2019-01-23 | 2019-05-14 | 成都理工大学 | In air131I dynamic equilibrium monitoring device and monitoring method |
| CN111220428A (en) * | 2020-02-25 | 2020-06-02 | 中国辐射防护研究院 | Multi-channel test device for sampling radioactive aerosol and gaseous iodine |
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| Publication number | Publication date |
|---|---|
| CN107702950B (en) | 2020-02-07 |
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