CN205404817U - Be used for alpha radioactivity internal contamination nose swab detection device - Google Patents
Be used for alpha radioactivity internal contamination nose swab detection device Download PDFInfo
- Publication number
- CN205404817U CN205404817U CN201620188308.8U CN201620188308U CN205404817U CN 205404817 U CN205404817 U CN 205404817U CN 201620188308 U CN201620188308 U CN 201620188308U CN 205404817 U CN205404817 U CN 205404817U
- Authority
- CN
- China
- Prior art keywords
- nose swab
- frame
- nose
- specimen holder
- swab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The utility model discloses a be used for alpha radioactivity internal contamination nose swab detection device, including the nose swab frame of installation nose swab, sample frame, the vacuum cavity of installation nose swab frame, an at least nose swab is installed to nose swab shelf energy, and does not shelter from the head of nose swab, rear end face department is equipped with pop -up mechanism in the sample frame, and nose swab shelf energy inserts from the preceding terminal surface of sample frame to closely cooperate with pop -up mechanism, sample frame left and right sides symmetry is equipped with a detector, the detector meets a leading processing circuit respectively, and the sample chord position is in the vacuum cavity. The utility model discloses a personnel's of awaiting measuring nasal cavity swab inserts the sample frame as the target detection thing with the nose swab, and sample frame both sides are equipped with detection circuit to putting into the vacuum cavity evacuation with whole and measuring, because it is fixed with the detector distance to be surveyed the sample, two -sided three -dimensional the measurement is constituteed to two detectors, combines the evacuation, and greatly increased detection efficiency has reduced the detection lower limit.
Description
Technical field
This utility model relates to a kind of alpha activity pollution detection system, particularly relates to a kind of for alpha activity internal contamination nose swab detecting device.
Background technology
It is generally of the radioactive substance of heavy atom ordinal number, as uranium series, thorium family can radiate alpha-particle by alpha-decay.Alpha ray is a kind of charged particle stream, and due to charged, its place of arrival is easy to cause ionization.Alpha ray has very strong ionizing power, therefore brings certain destructiveness, especially that people's in-vivo tissue damage capability is bigger.Additionally its quality is relatively big, and penetration capacity is poor, and aerial range only has several centimetres, as long as the skin of a piece of paper or health just can block, therefore, mainly prevents from being undertaken internal by respiratory system or oral cavity for alpha-active protection.Natural alpha ray is mainly derived from cosmic ray and some natural radioactive element tellurian, after the mankind carry out core correlated activation, the pith in the various radioelement composing environment α sources being discharged in earth's surface or air with gas, liquid or solid form.Especially when burst nuclear accident or nuclear leakage occur, various nuclear facilities leak into the radioelement of surrounding, the rising of ambient atmosphere alpha-particle concentration can be caused, thus causing that high-volume personnel need scene to carry out because respiratory system causes that alpha activity internal contamination detects in time, to find contaminated serious the wounded in time, provide scientific basis for emergency aid and treatment.
Owing to alpha range only has several centimetres in atmosphere, and penetration capacity is very weak, so when there is nuclear accident or nuclear leakage, migrating depending mainly on aerosol；Secondly as be measure human body alpha activity internal contamination, currently without suitable means, traditional measuring method is not suitable for high-volume Mass screening and measures.
Summary of the invention
The purpose of this utility model is that offer one solves the problems referred to above, it is easy to people carry out quickly, in time, accurately because respiratory system causes that alpha activity internal contamination detects, and the one that detection efficient is high, detection limit is low is for alpha activity internal contamination nose swab detecting device.
To achieve these goals, the technical solution adopted in the utility model is such that
A kind of for alpha activity internal contamination nose swab detecting device, including installing the nose swab frame of nose swab, installing the specimen holder of nose swab frame, vacuum chamber, described nose swab is made up of bar portion and head, and head is enclosed with filter membrane；
Described nose swab frame can install at least one nose swab, and does not block the head of nose swab；
Described specimen holder is the cuboid of horizontal positioned, inner hollow, including left surface, right flank, front end face, rear end face, four faces all have window, in specimen holder, rear end face place is provided with ejecting mechanism, and nose swab frame can insert from specimen holder front end face, and closely cooperates with ejecting mechanism；
The specimen holder left and right sides is arranged with a detector, and described detector connects an advance signal respectively and processes circuit, and detector center is just to the nose swab head center in nose swab frame；
Described vacuum chamber includes front sealing plate and rear sealing plate, front sealing plate connects with vacuum chamber upset, specimen holder is positioned at vacuum chamber, front and rear end is respectively facing forward and backward sealing plate, left and right side is provided with the retaining mechanism being fixed in vacuum chamber, is provided with and connects advance signal and process the signaling interface of circuit, connect detector and advance signal and process the power interface of circuit power end and connect the vacuum pipe interface of vacuum lead on rear sealing plate.
Assembling mode of the present utility model is:
1. nose swab is loaded in nose swab frame, insert from the front end face of specimen holder, and closely cooperate with ejecting mechanism, two detectors are separately mounted to the left and right sides of specimen holder, two detectors connect again an advance signal respectively and process circuit, and two advance signals process circuit and are also respectively installed at the left and right sides of specimen holder；
2., after above-mentioned specimen holder being put into vacuum chamber, front and rear end is respectively facing forward and backward sealing plate, the upper signaling interface of corresponding connection, power interface and vacuum pipe interface, and is locked by retaining mechanism by specimen holder；
3. close the front sealing plate of vacuum chamber, evacuation, discharge the air sealed in cavity, then start to measure.
4. measure after terminating, recover vacuum chamber air, open front sealing plate, take out specimen holder, take out nose swab frame by ejecting mechanism, after changing nose swab, can again measure.
Compared with prior art, the utility model has the advantage of: adopt the nasal swabs of personnel to be measured as target acquisition thing, nose swab is inserted specimen holder, specimen holder both sides are provided with detection circuit, and entirety is put into the measurement of vacuum chamber evacuation, owing to sample and detector distance are fixed, double detector composition dual-surface stereo is measured, in conjunction with evacuation, it is greatly increased detection efficient, reduces detection limit.
As preferably: described nose swab frame is the rectangle laminated structure being vertically arranged, nose swab frame is provided with two and runs through its double-edged through hole, two through hole horizontal distribution, is provided with the draw-in groove of several levels between two through hole, the bar portion of nose swab can be connected in draw-in groove, and head is positioned at a through hole.
As preferably: described retaining mechanism is provided with a field generator, the positive pole of field generator is positioned at the end face that ejecting mechanism touches with nose swab bridge joint, negative pole is positioned at vacuum chamber inwall and just right with specimen holder left and right side, described nose swab frame tow sides are provided with becket, and when nose swab frame closely cooperates with ejecting mechanism, becket connects with field generator positive pole.
This utility model increases a field generator, make formation electric field between nose swab frame and detector, what connect due to the becket of nose swab frame is positive pole, and negative pole is positioned at vacuum chamber inwall and just right with specimen holder left and right side, so defining the electric field vertical with nose swab frame.This structure causes that the alpha-particle originally do not launched towards detector enters to inject detector under electric field action, improves detection efficient.
This structure, will not block the head of nose swab, it is possible to be easily assemblied on nose swab frame by nose swab, and disassemble easily, and when nose swab frame inserts after in specimen holder, multiple nose swabs are distributed up and down, do not affect the measurement of detector.
As preferably: described detector is circular, and its test surface is parallel with the nose swab frame inserted in specimen holder.Such double detector forms 4 π measurement in spaces, is greatly increased detection efficient.
As preferably: described nose swab frame, specimen holder all adopt polytetrafluoroethylmaterial material to make.Preventing from causing that faint charge signal is measured system and produced unnecessary interference because Electrostatic Absorption or equipment shake, system stability is measured in impact.
As preferably: detector and advance signal process circuit and be fixed on specimen holder each through a support, and are arranged in vacuum chamber.It is shorter that such detector and advance signal process holding wire between circuit, decreases the input circuit electric capacity of conductor signal decay and front end circuit, it is thus achieved that signal truer.
As preferably: described becket is positioned at the edge of through hole.After installing due to nose swab, head is positioned at through hole, and becket is positioned at the edge of through hole, can better make electric field headward, it is simple to measure.
Accompanying drawing explanation
Fig. 1 is the structural representation after this utility model assembling；
Fig. 2 is the decomposition texture schematic diagram of vacuum chamber；
Fig. 3 is the structural representation of specimen holder in Fig. 2；
Fig. 4 is the structural representation of nose swab frame.
In figure: 1, nose swab frame；11, head；12, bar portion；13, through hole；14, draw-in groove；2, specimen holder；21, ejecting mechanism；22, detector；23, advance signal processes circuit；24, retaining mechanism；25, support；3, vacuum chamber；31, front sealing plate；32, rear sealing plate；33, signaling interface；34, power interface；35, vacuum pipe interface.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Embodiment 1: referring to Fig. 1 to Fig. 4, a kind of for alpha activity internal contamination nose swab detecting device, including installing the nose swab frame 1 of nose swab, installing the specimen holder 2 of nose swab frame 1, vacuum chamber 3, described nose swab is made up of bar portion 12 and head 11, and head 11 is enclosed with filter membrane；
Described nose swab frame 1 can install at least one nose swab, and does not block the head 11 of nose swab；
Described specimen holder 2 is the cuboid of horizontal positioned, and inner hollow, including left surface, right flank, front end face, rear end face, four faces all have window, in specimen holder 2, rear end face place is provided with ejecting mechanism 21, and nose swab frame 1 can insert from specimen holder 2 front end face, and closely cooperates with ejecting mechanism 21；
Specimen holder 2 left and right sides is arranged with a detector 22, and described detector 22 connects an advance signal respectively and processes circuit 23, and detector 22 center is just to nose swab head 11 center in nose swab frame 1；
Described vacuum chamber 3 includes front sealing plate 31 and rear sealing plate 32, front sealing plate 31 is connected with vacuum chamber 3 upset, specimen holder 2 is positioned at vacuum chamber 3, front and rear end is respectively facing forward and backward sealing plate 32, left and right side is provided with the retaining mechanism 24 being fixed in vacuum chamber 3, and rear sealing plate 32 is provided with and connects advance signal and process the signaling interface 33 of circuit 23, connect detector 22 and advance signal and process the power interface 34 of circuit 23 power end and connect the vacuum pipe interface 35 of vacuum lead.
In the present embodiment, described nose swab frame 1 is the rectangle laminated structure being vertically arranged, nose swab frame 1 is provided with two and runs through its double-edged through hole 13, two through hole 13 horizontal distribution, the draw-in groove 14 of several levels it is provided with between two through hole 13, the bar portion 12 of nose swab can be connected in draw-in groove 14, and head 11 is positioned at a through hole 13；Described detector 22 is circular, and its test surface is parallel with the nose swab frame 1 inserted in specimen holder 2；Described nose swab frame 1, specimen holder 2 all adopt polytetrafluoroethylmaterial material to make；Detector 22 and advance signal process circuit 23 and are fixed on specimen holder 2 each through a support 25.
Embodiment 2:
For the ease of actual emulation, we provide the concrete size of product, vacuum chamber 3: length × wide × height is: 234mm × 132mm × 102mm；Nose swab frame 1: length × wide × Gao Weiwei: 102mm × 56mm × 6mm.
Owing to market not having the alpha activity internal contamination nose swab detector of standard, and adopt general alpha activity to measure instrument after only carrying out chemical treatment and making plating sheet and carry out alpha activity measurement, general alpha activity is measured the detector 22 of instrument and is horizontal positioned with sample, between them, mutual structural relation is that surface is parallel and the structure of position upper and lower relation, detector 22 only one of which, that is to say that general alpha activity is measured instrument and can only be measured a surface of sample, that is to say that often says in our prior art measures close to 2 π.
This utility model is measured for the alpha activity of nose swab, has made Special sample holder 2 for placing nose swab；2 detectors 22 are vertical placement with by nose swab frame 1 support 25, and the position mutual relation between them is that surface is parallel and the distribution of left, center, right, position, and sample is between two detectors 22, and central coaxial is symmetrical.Accordingly, with respect to sample, measuring two faces of sample, and 11, the head of nose swab is as little ellipsoid shape, 4 π often said close to us measure.
Embodiment 3
On the basis of embodiment 2, increase electric field, on retaining mechanism 24, namely it is provided with a field generator interface, the end face that the positive pole of field generator contacts with nose swab frame 1 with ejecting mechanism 21 is connected, negative pole is connected with detector 22 shell of specimen holder 2 left and right side, and described nose swab frame 1 tow sides are provided with becket, and when nose swab frame 1 closely cooperates with ejecting mechanism 21, becket connects with field generator positive pole, and described becket is positioned at the edge of through hole 13.
It is to say, after nose swab inserts nose swab frame 1, positive pole is positioned on nose swab frame 1, and negative pole is positioned at vacuum chamber 3 inwall and just right with specimen holder 2 left and right side, so defining the electric field vertical with nose swab frame 1.This structure causes that the alpha-particle originally do not launched towards detector 22 enters to inject detector 22 under electric field action.
For the product size of embodiment 2,3, we carry out actual measurement, by the nose swab of two known activity, and namely nose swab, it is arranged in nose swab frame 1, nose swab frame 1 is put into specimen holder 2, after assembling specimen holder 2 and circuit, close vacuum chamber 3, evacuation, start to measure.
It is known that sample activity and the time of measurement, 4 π measured with added electric field for 2 π measurements, 4 π measure test condition three kinds different, and we draw table 1 below:
Under 1: three kind of condition of table, nose swab measures efficiency synopsis
As can be seen from Table 1, two nose swabs are sample, and sample activity is 978Bq, and the measurement time is 180s.Measure for 2 π, 4 π that 4 π measure with added electric field measure three kinds different test condition, we draw to same sample count value, measure activity, according to the ratio measuring activity and sample activity, calculate detection efficient of the present utility model and be significantly improved.
But owing to background counting rate is low, sample-out count time lengthening is 30 minutes by we, measure for common Alpha-ray 2 π, 4 π that this utility model adopts measure and added electric field 4 π that adopts of this utility model measures in three under metering system background count respectively 2,0 and 0, illustrate that background count is negligible under this utility model measuring condition.
It follows that our detection efficient is about 58%.Measure us and demarcate efficiency value according to detection efficient after so, when test crowd is detected by needs, our efficiency value according to measurement activity and demarcation, it is possible to calculate actual activity value.
This utility model detection time is short, be suitable for high-volume Mass screening measures.
Claims (7)
1. one kind is used for alpha activity internal contamination nose swab detecting device, it is characterised in that: including installing the nose swab frame of nose swab, installing the specimen holder of nose swab frame, vacuum chamber, described nose swab is made up of bar portion and head, and head is enclosed with filter membrane；
Described nose swab frame can install at least one nose swab, and does not block the head of nose swab；
Described specimen holder is the cuboid of horizontal positioned, inner hollow, including left surface, right flank, front end face, rear end face, four faces all have window, in specimen holder, rear end face place is provided with ejecting mechanism, and nose swab frame can insert from specimen holder front end face, and closely cooperates with ejecting mechanism；
The specimen holder left and right sides is arranged with a detector, and described detector connects an advance signal respectively and processes circuit, and detector center is just to the nose swab head center in nose swab frame；
Described vacuum chamber includes front sealing plate and rear sealing plate, front sealing plate connects with vacuum chamber upset, specimen holder is positioned at vacuum chamber, front and rear end is respectively facing forward and backward sealing plate, left and right side is provided with the retaining mechanism being fixed in vacuum chamber, is provided with and connects advance signal and process the signaling interface of circuit, connect detector and advance signal and process the power interface of circuit power end and connect the vacuum pipe interface of vacuum lead on rear sealing plate.
2. one according to claim 1 is used for alpha activity internal contamination nose swab detecting device, it is characterized in that: described nose swab frame is the rectangle laminated structure being vertically arranged, nose swab frame is provided with two and runs through its double-edged through hole, two through hole horizontal distribution, the draw-in groove of several levels it is provided with between two through hole, the bar portion of nose swab can be connected in draw-in groove, and head is positioned at a through hole.
3. one according to claim 1 and 2 is used for alpha activity internal contamination nose swab detecting device, it is characterized in that: described retaining mechanism is provided with a field generator, the positive pole of field generator is positioned at the end face that ejecting mechanism touches with nose swab bridge joint, negative pole is positioned at vacuum chamber inwall and just right with specimen holder left and right side, described nose swab frame tow sides are provided with becket, and when nose swab frame closely cooperates with ejecting mechanism, becket connects with field generator positive pole.
4. one according to claim 1 is used for alpha activity internal contamination nose swab detecting device, it is characterised in that: described detector is circular, and its test surface is parallel with the nose swab frame inserted in specimen holder.
5. one according to claim 1 is used for alpha activity internal contamination nose swab detecting device, it is characterised in that: described nose swab frame, specimen holder all adopt polytetrafluoroethylmaterial material to make.
6. one according to claim 1 is used for alpha activity internal contamination nose swab detecting device, it is characterised in that: detector and advance signal process circuit and are fixed on specimen holder each through a support.
7. one according to claim 3 is used for alpha activity internal contamination nose swab detecting device, it is characterised in that: described becket is positioned at the edge of through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620188308.8U CN205404817U (en) | 2016-03-11 | 2016-03-11 | Be used for alpha radioactivity internal contamination nose swab detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620188308.8U CN205404817U (en) | 2016-03-11 | 2016-03-11 | Be used for alpha radioactivity internal contamination nose swab detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205404817U true CN205404817U (en) | 2016-07-27 |
Family
ID=56440222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620188308.8U Withdrawn - After Issue CN205404817U (en) | 2016-03-11 | 2016-03-11 | Be used for alpha radioactivity internal contamination nose swab detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205404817U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549061A (en) * | 2016-03-11 | 2016-05-04 | 成都理工大学 | Nasal swab detection device for alpha radioactive internal contamination |
-
2016
- 2016-03-11 CN CN201620188308.8U patent/CN205404817U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549061A (en) * | 2016-03-11 | 2016-05-04 | 成都理工大学 | Nasal swab detection device for alpha radioactive internal contamination |
| CN105549061B (en) * | 2016-03-11 | 2018-02-16 | 成都理工大学 | One kind is used for pollution nose swab detection means in alpha activity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107257932B (en) | Utilize the ionisation chamber of double probe structures and the alpha particle detection device of difference amplifier | |
| EP2778716B1 (en) | Detector and method for simultaneously detecting gamma ray and neutron ray using same | |
| CN102928864B (en) | Method and system for measuring gas tritium based on multi-wire proportional chamber | |
| CN109254316A (en) | A kind of nuclear power station aerosol continuous radiation monitoring device | |
| CN208969246U (en) | A kind of novel aerosol meets panel detector structure | |
| CN205404817U (en) | Be used for alpha radioactivity internal contamination nose swab detection device | |
| CN105549061B (en) | One kind is used for pollution nose swab detection means in alpha activity | |
| CN108761515B (en) | Aerosol on-line detector | |
| CN109444946A (en) | A kind of intelligence radon thorium analyzer | |
| CN104597472B (en) | The assay method of wound radioactive pollution depth, nucleic species and activity | |
| CN204439843U (en) | X-ray beam intensity of flow supervising device and X-ray inspection system | |
| US3246151A (en) | Low background beta-ray scintillation spectrometer | |
| CN208888376U (en) | A kind of digitlization iodine monitoring detection device | |
| JPH0478153B2 (en) | ||
| CN210894717U (en) | Beam intensity detection device and particle accelerator | |
| CN110954935A (en) | Radon measuring device based on ionization chamber and semiconductor detector | |
| CN113539532A (en) | System and method for detecting damage of spent fuel assembly | |
| CN205608196U (en) | Well type scintillation body gamma register for easy reference detection device | |
| CN213600893U (en) | Integrated neutron gamma dose rate instrument | |
| Bacak et al. | A compact multi-plate fission chamber for the simultaneous measurement of 233U capture and fission cross-sections | |
| CN104597111A (en) | A measuring method of radon gas in environment | |
| Rissanen et al. | Structure of 115 Ag studied by β− decays of 115 Pd and 115 Pd m | |
| CN202904028U (en) | Gaseous tritium measurement system based on multiwire proportional chamber | |
| CN215227685U (en) | Blood collection tube for inspection | |
| CN213903810U (en) | Nuclear emergency medical rescue environment three-dimensional radiation monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160727 Effective date of abandoning: 20180216 |
|
| AV01 | Patent right actively abandoned |