CN103163167A - Neutron moisture gauge detector - Google Patents
Neutron moisture gauge detector Download PDFInfo
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- CN103163167A CN103163167A CN2011104203548A CN201110420354A CN103163167A CN 103163167 A CN103163167 A CN 103163167A CN 2011104203548 A CN2011104203548 A CN 2011104203548A CN 201110420354 A CN201110420354 A CN 201110420354A CN 103163167 A CN103163167 A CN 103163167A
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Abstract
The invention discloses a neutron moisture gauge detector which comprises a housing, a cadmium plate layer wrapped on the outer wall of the housing and a neutron source arranged at a vertical center of the cavity of the housing, wherein a back reflection plate closely connected with the inner wall of the housing and the outer wall of the neutron source is horizontally arranged in the cavity of the housing, an electronics unit mainly composed by a high voltage module and a signal processing module is arranged at the bottom of the cavity of the housing, residual space in the cavity of the housing below the back reflection plate is filled with shielding layers, a plurality of sets of counting tube supports symmetrically arranged from interior to exterior and counting tubes installed on the supports are arranged around the head of the neutron source in space in the housing above the back reflection plate, the root parts of the supports are fixed on the back reflection plate, the counting tubes are installed to form a rectangular array, the height of the counting tubes on the supports gradually increases from interior to exterior to form ladder distribution, an inclined plane reflection plate in a loop corridor is arranged around the counting tubes on the supports, the sidewall of the inclined plane reflection plate is fixed on the sidewall of the housing, and the bottom of the inclined plane reflection plate is fixed on the back reflection plate. The neutron moisture gauge detector provided by the invention has the advantages of good sensitivity, high usage efficiency of the neutron source and the like.
Description
Technical field
The present invention relates to a kind of moisture content detector, specifically the coke before blast furnace feeding is carried out a kind of neutron moisture tester detector of water content detection.
Background technology
In steel mill's blast furnace ironmaking process, because the coke that comes into operation contains certain moisture usually, tend to cause the variation into the stove carbon content, cause furnace temperature fluctuation, affect the quality of the product of coming out of the stove.Usually in process of production, in order to control more exactly the content of blast furnace feeding charcoal, need the coke that enters the stokehold is carried out water content detection, in order to stablize better furnace temperature, improve the quality of product.
Neutron moisture water technique functions comes from the mid-80, has been widely used at present in the industrial environments such as steel mill's smelting.It has utilized fast neutron easily to change the characteristic of slow neutron into hydrone generation inelastic collision, use BF
3Or
3The He counter tube gathers slow neutron, and output signal is transferred to computing machine and carried out counting statistics after the electronics cell processing, then passes through to demarcate the functional relation of moisture content of material and counter tube output signal frequency, thereby calculates the actual moisture content value of material.At present, neutron moisture water device has had matured product at home and abroad, its probe has multiple, as: publication number is that the Chinese patent of CN87206967 has been described a kind of " probe for neutron water measuting instrument ", this probe for neutron water measuting instrument has adopted the one-dimensional array mode around neutron source arranged on both sides counter tube, and its defective is:
1. because reflector height is lower, reduced radiation proof security;
2. due to the slowing down scattering process of material, on the surface of contact of device and material, may produce the more neutron beam that leaks outside that can not be shielded to by device, thereby surrounding environment is polluted.
3. the device cross-sectional area is less, detection area and the limitation that fathomed.
Summary of the invention
The object of the invention is to: a kind of a kind of neutron moisture tester detector that improves radioactive source source strength utilization factor is provided.
The present invention is achieved in that
A kind of neutron moisture tester detector includes shell, is wrapped in cadmium flaggy on the shell outer side surface, is arranged on the neutron source in the vertical centre of shell cavity,
It is characterized in that:Be horizontally disposed with the backside reflection plate with housing madial wall and the driving fit of neutron source outer wall phase in the shell cavity; In the bottom of shell cavity, be provided with the electronics unit that is mainly formed by high-pressure modular and signal processing module; The remaining space of the shell cavity below reflecting plate is filled screen layer overleaf; Shell space above reflecting plate overleaf, head round neutron source, outwards be arranged with symmetrically many group roots and be fixed on counter tube support on the backside reflection plate from inner, and the counter tube of rack-mount rectangular array layout, on support the height of counter tube from inside to outside successive increase and be ladder and distribute; Counter tube on these supports, inclined-plane reflecting plate in the ring corridor that is provided with that sidewall is fixed on housing sidewall, the bottom is fixed on the backside reflection plate.
Additional technical feature is:
The described every group of counter tube that increases arrangement from inner outside successive is linked to be one group by the counting pipe clamp, is arranged on support separately.
Described counter tube has 4 groups, and every group has 3 counter tubes that increase arrangement from inner outside successive to be arranged in rectangular array.
Described counter tube adopts BF
3Or
3The He pipe.
Described screen layer adopts the polyethylene board of Multilayer Structure, is fixed on outer casing inner wall by through bolt.
The invention has the advantages that: compared with prior art, arranging round neutron source of the rectangular array way symmetry of counter tube of the present invention, in every group of counter tube, the height of each counter tube is the valency ladder and distributes from inner outwards increasing successively round neutron source, counter tube is collected more fully from slowing down scattered neutron (the corresponding approximately variation of 20 ~ 45cps of every 1% moisture content change when using 300mCiAm-Be neutron source in detector the place ahead, measuring accuracy 0.5%), improved the utilization factor of radioactive source source strength.(diameter of section φ=40cm), improved the measurement area of detector and fathomed has reduced the neutron beam number of being revealed by the scattering of material slowing down, has greatly improved the overall security of equipment to have increased simultaneously the sectional area of detector.Polyethylene board absorbs except the fast neutron that radioactive source is rearward leaked carries out slowing down, can also carry out radiation shield to the gamma-rays that produces in the Moderation of the fast neutrons process, effectively reduces the dosage level of detector surface, makes equipment safer.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Mark in figure: 1. neutron source; 2. counter tube; 3. support; 4. counting pipe clamp; 5. encircle corridor reflecting plate, 6 backside reflection plates; 7. screen layer; 8. shell; 9. cadmium flaggy; 10. electronics unit.
Embodiment
As shown in Figure 1 and Figure 2, a kind of neutron moisture tester detector, include shell 8, be wrapped in cadmium flaggy 9 on shell 8 outer side surfaces, be arranged on the neutron source 1 in the vertical centre of shell cavity, be horizontally disposed with the backside reflection plate 6 with housing madial wall and the driving fit of neutron source outer wall phase in the shell cavity; Be provided with mainly the electronics unit 10 that is formed by high-pressure modular and signal processing module in the bottom of shell cavity; The remaining space of the shell cavity below reflecting plate 6 is filled screen layer 7 overleaf; Shell space above reflecting plate 6 overleaf, head round neutron source, outwards be arranged with symmetrically many group roots and be fixed on counter tube support 3 on backside reflection plate 6 from inner, and the counter tube 2 that is arranged on rectangular array layout on support 3, on support the height of counter tube 2 from inside to outside successive increase and be ladder and distribute; Counter tube 2 on these supports, inclined-plane reflecting plate 5 in the ring corridor that is provided with that sidewall is fixed on housing sidewall, the bottom is fixed on backside reflection plate 6.
The described every group of counter tube 2 that increases arrangement from inner outside successive is linked to be one group by counting pipe clamp 4, is arranged on support separately.
Described counter tube has 4 groups, and every group has 3 of counter tubes that increase arrangement from inner outside successive to be arranged in 3 rectangular arrays.
The present invention adopts integrated structure design, and neutron source 1, counter tube 2, electronics unit 10 is integrated together.Neutron source 1 is arranged on the center of detector, and its installation site should guarantee that the neutron beam without 9 shieldings of protection cadmium plate is in the taper zone of detector the place ahead＜2 π solid angles, to reduce the neutron beam that leaks, reduces the apparatus surface radiation level.
Counter tube 2 can adopt BF
3Or
3He pipe is the job requirement to high-pressure modular of reduction system, and the present invention adopts
3The He counter tube.
In the present invention, the layout of this array of counter tube can be collected the slow neutron that forms through after determinand scattering slowing down more fully, thereby improves measuring accuracy and the sensitivity of Whole Equipment.Inclined-plane reflecting plate 5 in the ring corridor can be vacateed the more longer counter tube of more space mounting 2; Backside reflection plate 6 adopts Multilayer Structure, is connected with each other by bolt, and level is arranged on the inwall of detector.
The thickness of every layer of backside reflection plate 6 reflecting plate is 0.5 ~ 1cm, and its number of plies can be adjusted according to actual needs.
The Main Function of inclined-plane reflecting plate 5 and backside reflection plate 6 in around neutron source 1 and ring corridor, it is the fast neutron Shu Jinhang reflection in the rear 2 π solid angles that neutron source 1 is sent, improve the fast neutron number of detector the place ahead 2 π, also can carry out slowing down and absorption to the fast neutron that radioactive source leaks simultaneously, reduce the radiation pollution level of detector outer wall.
For radiation proof safety, the detector bottom is provided with screen layer 7, screen layer 7 adopts polyethylene board, for convenience of processing and installation, adopt Multilayer Structure, be fixed on container outer wall 8 by through bolt, polythene material absorbs except the fast neutron that radioactive source is rearward leaked carries out slowing down, can also carry out radiation shield to the gamma-rays that produces in the Moderation of the fast neutrons process, reduce the dosage level of detector surface.Probe body 8 adopts iron plate, absorbs slow neutron and gamma-ray shield effectiveness except providing, and can also provide enough physical strengths to bear the weight of detector self.
Because detector outer wall shielding thickness is thinner, adopt cadmium flaggy 9 parcels, fast neutron and the gamma-rays that may leak are done further absorption.The bottom of detector is located in electronics unit 10, has tygon screen layer 7 bottom detector, can reduce the radiation damage that radioactive source causes circuit board, electronics unit 10 includes high-pressure modular and signal processing module, the mode that adopts the multichannel high pressure to separate, power respectively, four groups of counter tubes on pair array four limits provide working voltage respectively, simultaneously the signal of counter tube multichannel output are processed statistics, the slow neutron total count value that last output unit measures.
Claims (5)
1. neutron moisture tester detector includes shell (8), is wrapped in cadmium flaggy (9) on shell (8) outer side surface, is arranged on the neutron source (1) in shell (8) the vertical centre of cavity,
It is characterized in that:Be horizontally disposed with the backside reflection plate (6) with housing (8) madial wall and the driving fit of neutron source (1) outer wall phase in shell (8) cavity; Be provided with the electronics unit (10) that is mainly formed by high-pressure modular and signal processing module in the bottom of shell (8) cavity; The remaining space of the shell cavity below reflecting plate (6) is filled screen layer (7) overleaf; Shell space above reflecting plate (6) overleaf, head round neutron source (1), outwards be arranged with symmetrically many group roots and be fixed on counter tube support (3) on backside reflection plate (6) from inner, and the counter tube (2) that is arranged on the upper rectangular array layout of support (3), the height of counter tube on support (2) successive from inside to outside increases and is ladder and distributes; Counter tube (2) on these supports is provided with that sidewall is fixed on housing (8) sidewall, the bottom is fixed on inclined-plane reflecting plate (5) in ring corridor on backside reflection plate (6).
2. according to neutron moisture tester detector claimed in claim 1, it is characterized in that: described counter tube has 4 groups, and every group has 3 counter tubes that increase arrangement from inner outside successive to be arranged in rectangular array.
3. according to neutron moisture tester detector claimed in claim 2, it is characterized in that: the described every group of counter tube (2) that increases arrangement from inner outside successive, be linked to be one group by counting pipe clamp (4), be arranged on support (3) separately.
4. according to neutron moisture tester detector claimed in claim 1, it is characterized in that: described counter tube (2) adopts BF
3,
3It is a kind of that He manages.
5. according to neutron moisture tester detector claimed in claim 1, it is characterized in that: described screen layer (7) adopts the polyethylene board of Multilayer Structure, is fixed in by through bolt on the inwall of shell (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104203548A CN103163167A (en) | 2011-12-15 | 2011-12-15 | Neutron moisture gauge detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104203548A CN103163167A (en) | 2011-12-15 | 2011-12-15 | Neutron moisture gauge detector |
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| CN103163167A true CN103163167A (en) | 2013-06-19 |
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|---|---|---|---|
| CN2011104203548A Pending CN103163167A (en) | 2011-12-15 | 2011-12-15 | Neutron moisture gauge detector |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290367A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The online neutron activation sulfurbased NPK analytical equipment of transmission-type cement slurry and analysis method |
| CN107290368A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The application process of the reflective online cement slurry sulfurbased NPK analyzer of neutron activation |
| CN107290371A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The reflective online neutron activation sulfurbased NPK analytical equipment of cement slurry and analysis method |
| CN107290365A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | A kind of application process of the online sintering feed alkalinity analyzing instrument of transmission-type neutron activation |
| CN107290354A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | A kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and analysis method |
| CN107290364A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The application process of the online cement slurry sulfurbased NPK analyzer of transmission-type neutron activation |
| CN107290355A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The online neutron activation alumina silica ratio analytical equipment of transmission-type bauxite and analysis method |
| CN107290366A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | A kind of application process of online bauxite aluminium-silicon of transmission-type neutron activation than analyzer |
| CN110286137A (en) * | 2019-07-24 | 2019-09-27 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of equivalent NEUTRON METHOD detection device of coming to nothing in steel-shelled concrete interface |
| CN110320224A (en) * | 2019-08-08 | 2019-10-11 | 中国科学技术大学 | Concrete failure detector and defectoscope |
| CN110927187A (en) * | 2019-10-24 | 2020-03-27 | 东莞材料基因高等理工研究院 | Neutron transmission multichannel focusing conduit device and neutron diffraction spectrometer |
Citations (3)
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|---|---|---|---|---|
| CN87206967U (en) * | 1987-05-04 | 1988-03-30 | 首都钢铁公司 | Probe for neutron water measuting instrument |
| JP2005227199A (en) * | 2004-02-16 | 2005-08-25 | Central Res Inst Of Electric Power Ind | Method for measuring concentration of boron and measuring instrument therefor |
| CN202494653U (en) * | 2011-12-15 | 2012-10-17 | 中国核动力研究设计院 | Neutron moisture tester detector |
-
2011
- 2011-12-15 CN CN2011104203548A patent/CN103163167A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87206967U (en) * | 1987-05-04 | 1988-03-30 | 首都钢铁公司 | Probe for neutron water measuting instrument |
| JP2005227199A (en) * | 2004-02-16 | 2005-08-25 | Central Res Inst Of Electric Power Ind | Method for measuring concentration of boron and measuring instrument therefor |
| CN202494653U (en) * | 2011-12-15 | 2012-10-17 | 中国核动力研究设计院 | Neutron moisture tester detector |
Non-Patent Citations (1)
| Title |
|---|
| 宋广文等: "中子测水仪―微机配料称量控制系统在铁合金电炉上的应用", 《铁合金》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290355A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The online neutron activation alumina silica ratio analytical equipment of transmission-type bauxite and analysis method |
| CN107290367A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The online neutron activation sulfurbased NPK analytical equipment of transmission-type cement slurry and analysis method |
| CN107290371A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The reflective online neutron activation sulfurbased NPK analytical equipment of cement slurry and analysis method |
| CN107290365A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | A kind of application process of the online sintering feed alkalinity analyzing instrument of transmission-type neutron activation |
| CN107290354A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | A kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and analysis method |
| CN107290364A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The application process of the online cement slurry sulfurbased NPK analyzer of transmission-type neutron activation |
| CN107290368A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | The application process of the reflective online cement slurry sulfurbased NPK analyzer of neutron activation |
| CN107290366A (en) * | 2016-03-31 | 2017-10-24 | 丹东东方测控技术股份有限公司 | A kind of application process of online bauxite aluminium-silicon of transmission-type neutron activation than analyzer |
| CN110286137A (en) * | 2019-07-24 | 2019-09-27 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of equivalent NEUTRON METHOD detection device of coming to nothing in steel-shelled concrete interface |
| CN110286137B (en) * | 2019-07-24 | 2022-04-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Steel shell concrete interface equivalent void neutron method detection device |
| CN110320224A (en) * | 2019-08-08 | 2019-10-11 | 中国科学技术大学 | Concrete failure detector and defectoscope |
| CN110320224B (en) * | 2019-08-08 | 2021-10-01 | 中国科学技术大学 | Concrete flaw detector and flaw detector |
| CN110927187A (en) * | 2019-10-24 | 2020-03-27 | 东莞材料基因高等理工研究院 | Neutron transmission multichannel focusing conduit device and neutron diffraction spectrometer |
| CN110927187B (en) * | 2019-10-24 | 2023-10-17 | 东莞材料基因高等理工研究院 | Neutron transmission multichannel focusing catheter device and neutron diffraction spectrometer |
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Application publication date: 20130619 |