CN2447777Y - Beta ray dust gauge - Google Patents
Beta ray dust gauge Download PDFInfo
- Publication number
- CN2447777Y CN2447777Y CN 00246069 CN00246069U CN2447777Y CN 2447777 Y CN2447777 Y CN 2447777Y CN 00246069 CN00246069 CN 00246069 CN 00246069 U CN00246069 U CN 00246069U CN 2447777 Y CN2447777 Y CN 2447777Y
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- CN
- China
- Prior art keywords
- pump
- constant current
- current sampling
- bridge circuit
- membrane pump
- Prior art date
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Abstract
The utility model relates to a beta-ray dust gauge which is composed of an inlet air hood, a particle separator, a hand wheel, a radiation source, a dust collector, a detector, a constant current sampling pump, a controller, etc., wherein, the hand wheel and a drive gear are coaxially connected and fixed in a shaft sleeve of the hand wheel. A sealing gasket is pressed by a sealing spring. The drive gear is engaged with an upper paper clamping flogging chisel ring between which and a lower paper clamping annular towel a filter membrane is clamped and fixed on a paper clamping annular seat wheel. The particle separator, the drive gear and a supporting net barrier are positioned on a concentric position. The constant current sampling pump is composed of a left membrane pump and a right membrane pump. The Beta ray dust gauge provided by the utility model integrates a dust collecting device, a sampling air pump and a measuring system, eliminates human errors caused by a separate measuring device, brings convenience for measuring work and raises measuring accuracy. A the constant current controller provided with a self-accelerating circuit and temperature compensation has high sensitivity and raises the reliability of measured data. The constant current sampling pump composed of the left membrane pump and the right membrane pump raises the efficiency of the air pump.
Description
The utility model relates to a kind of beta-ray dust measuring instrument.
Present small-sized ray dust gauge all is split type, and promptly sampling apparatus and measurement mechanism separate; Owing to do not possess the constant current sampling pump, make surveying work very inconvenient, also be easy to generate personal error, the lowering apparatus measuring accuracy.
The purpose of this utility model is to adopt a kind of sampling apparatus and measurement mechanism to be combined, and adopts the constant current sampling pump, makes surveying work very convenient, is difficult for producing personal error, has improved Instrument measuring precision.Improved the defective of prior art.
The purpose of this utility model is achieved in that a kind of beta-ray dust measuring instrument, constitute by inlet fan housing, particle separator, handwheel, radiographic source, dust storage chamber, detector, constant current sampling pump, controller etc., it is characterized in that: handwheel 3 and transmission gear 7 be coaxial to be connected and to be fixed in the handwheel axle sleeve 5, the spring 6 that is used to seal is pushed down sealing gasket 8, transmission gear 7 and big shearing bushing 17 engagements of last holding paper, clamp filter membrane 16 in the middle of big shearing bushing of last holding paper and the lower clamping paper ring 15, and be fixed on the holding paper ring seat wheel 14; Particle separator 2, transmission gear 7 and supporting network grid 9 are in concentric position.The constant current sampling pump is made of left membrane pump 21, right membrane pump 28.
The also further as follows specific implementation of the purpose of this utility model: in controller, resistance R 1, R2, motor windings M and sampling winding Z constitute bridge circuit, the output terminal of bridge circuit connects the inverting input of comparer IC, the output terminal control of comparer IC promotes the base stage of triode Q, collector connects the A end of bridge circuit, be connected potentiometer W1, W2 between the inverting input of comparer IC and bridge circuit, the power cathode, the emitter that promotes triode is connected stabilized voltage supply WY with potentiometer W1, W2.
Adopt beta-ray dust measuring instrument provided by the utility model, realized that dust collect plant, sampling air pump and measuring system are integrated.Eliminated split type measurement mechanism bring personal error, make surveying work very convenient, improved Instrument measuring precision.Have from the constant-current controller of speedup circuit and temperature compensation highly sensitively, improve the reliability of measurement data.The constant current sampling pump is made of left membrane pump, right membrane pump, has improved the efficient of air pump.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is that structure master of the present utility model looks cut-open view.
Fig. 2 is that the master of constant current sampling pump of the present utility model looks cut-open view.
Fig. 3 is the circuit theory diagrams of controller of the present utility model.
With reference to Fig. 1, handwheel 3 and transmission gear 7 be coaxial to be connected and to be fixed in the handwheel axle sleeve 5, and the spring 6 that is used to seal is pushed down sealing gasket 8, transmission gear 7 and big shearing bushing 17 engagements of last holding paper, clamp filter membrane 16 in the middle of big shearing bushing of last holding paper and the lower clamping paper ring 15, and be fixed on the holding paper ring seat wheel 14; Particle separator 2, transmission gear 7 and supporting network grid 9 are in concentric position.Dust inlet 1 connects particulate separation device shell 2, and particulate separation device shell 2 connects handwheel 3 and hand wheel shaft cover for seat 5, and the hand wheel shaft cover for seat is fixed on the filter membrane chamber loam cake 18.Sealing gasket 8 is fixed on the transmission gear top, and a β source 4 is arranged in the transmission gear, and the transmission gear outside is wound with a Packing spring 6, and the supporting network grid are fixed on detector overcoat top.One space is arranged at the bottom of filter membrane chamber loam cake 18 is dust storage chamber 11.Detector 12 is fixed on detector 10 the insides.Support wheel is fixed on the dust storage chamber 11, and support wheel supports holding paper ring seat wheel 14, and lower clamping paper ring 15 is placed on holding paper ring seat wheel top.Control of dust filter membrane 16 is placed on the lower clamping paper ring top.The big shearing bushing 17 of last holding paper is pressed in the control of dust filter membrane on the lower clamping paper ring 15.
Mention handwheel and rotate, filter paper is rotated, filter paper rotates a week, can gather 9-12 sample, and revolution moves a sampling location, and transmission gear falls automatically, and Packing spring compresses sealing gasket and makes the gas circuit sealing.
With reference to Fig. 2, motor 19, the constant current sampling pump is made of left membrane pump 21, right membrane pump 28.On the membrane pump 21 of a left side suction hole 20 is arranged, left membrane pump one end has a valve block 22 and TR thin rubber film 23, and the venthole of left membrane pump is 24.Eccentric wheel 25 connects motor 19, and bearing 26 is connected on the eccentric wheel, and the suction hole of right membrane pump 28 is 29, is 32 on the venthole, and valve block is 31, and TR thin rubber film 30 has a catch bar 27 between the TR thin rubber film 23 and 30.
With reference to Fig. 3, in controller, resistance R 1, R2, motor windings M and sampling winding Z constitute bridge circuit, the output terminal of bridge circuit connects the inverting input of comparer IC, and the output terminal control of comparer IC promotes the base stage of triode Q, and collector connects the A end of bridge circuit, be connected potentiometer W1, W2 between the inverting input of comparer IC and bridge circuit, the power cathode, the emitter that promotes triode is connected stabilized voltage supply WY with potentiometer W1, W2.
Rotating speed of motor is controlled by controller 33, when resistance in the gas circuit increases, among the motor windings M electric current increase, pressure drop on the sampling winding Z increases, voltage U b on the bridge circuit B point rises, and the output voltage U o of comparer IC descends, and promoting pipe Q conducting degree increases, tube voltage drop Uc descends, the pressure drop Ua that bridge circuit A is ordered rises, and the voltage U ab on the motor winding M increases, and motor speed increases, make air-flow return to former definite value, it is constant and stable to keep gas flow.
During dust gauge work, the constant current sampling pump is worked automatically, and along with the dust on the control of dust filter membrane increases, controller detects the variation of current of electric, changes according to this and adjusts motor increase rotating speed, and it is constant to keep gas flow.The β ray that beta ray source in the transmission gear sends passes the dirt sample of control of dust filter membrane, and the β ray attenuation changes, and after detector receives the β ray, carries out signal Processing and shows measurement result by measuring system.
Claims (2)
1, a kind of beta-ray dust measuring instrument, constitute by inlet fan housing, particle separator, handwheel, radiographic source, dust storage chamber, detector, constant current sampling pump, controller etc., it is characterized in that: handwheel (3) and transmission gear (7) be coaxial to be connected and to be fixed in the handwheel axle sleeve (5), the spring that is used to seal (6) is pushed down sealing gasket (8), transmission gear (7) and the big shearing bushing of last holding paper (17) engagement, clamp filter membrane (16) in the middle of big shearing bushing of last holding paper and the lower clamping paper ring (15), and be fixed on the holding paper ring seat wheel (14); Particle separator (2), transmission gear (7) and supporting network grid (9) are in concentric position.The constant current sampling pump is made of left membrane pump (21), right membrane pump (28).
2, according to the described beta-ray dust measuring instrument of claim 1, it is characterized in that: in controller, resistance R 1, R2, motor windings M and sampling winding Z constitute bridge circuit, the output terminal of bridge circuit connects the inverting input of comparer IC, the output terminal control of comparer IC promotes the base stage of triode Q, collector connects the A end of bridge circuit, be connected potentiometer W1, W2 between the inverting input of comparer IC and bridge circuit, the power cathode, the emitter that promotes triode is connected stabilized voltage supply WY with potentiometer W1, W2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00246069 CN2447777Y (en) | 2000-08-08 | 2000-08-08 | Beta ray dust gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00246069 CN2447777Y (en) | 2000-08-08 | 2000-08-08 | Beta ray dust gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2447777Y true CN2447777Y (en) | 2001-09-12 |
Family
ID=33605414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00246069 Expired - Fee Related CN2447777Y (en) | 2000-08-08 | 2000-08-08 | Beta ray dust gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2447777Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975732A (en) * | 2010-09-19 | 2011-02-16 | 武汉市天虹仪表有限责任公司 | Portable automatic continuous concentration monitor for particulate matter |
| CN102980840A (en) * | 2012-11-02 | 2013-03-20 | 青岛佳明测控科技股份有限公司 | Manufacturing method for standard mass membrane used for beta-ray particulate matter calibration |
| CN103604732A (en) * | 2013-11-25 | 2014-02-26 | 中煤科工集团重庆研究院有限公司 | Integrated mechanism for collecting and measuring dust |
| CN103712898A (en) * | 2013-07-30 | 2014-04-09 | 戴艺 | Atmosphere suspended particulate matter mass concentration detector |
| CN103913406A (en) * | 2014-04-04 | 2014-07-09 | 北京西山新干线环保设备有限公司 | Automatic calibration method for beta absorption-type dust measurement instrument |
| CN109085188A (en) * | 2018-07-31 | 2018-12-25 | 国政通科技有限公司 | Explosive particle detection device and method |
-
2000
- 2000-08-08 CN CN 00246069 patent/CN2447777Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975732A (en) * | 2010-09-19 | 2011-02-16 | 武汉市天虹仪表有限责任公司 | Portable automatic continuous concentration monitor for particulate matter |
| CN101975732B (en) * | 2010-09-19 | 2012-11-28 | 武汉市天虹仪表有限责任公司 | Portable automatic continuous concentration monitor for particulate matter |
| CN102980840A (en) * | 2012-11-02 | 2013-03-20 | 青岛佳明测控科技股份有限公司 | Manufacturing method for standard mass membrane used for beta-ray particulate matter calibration |
| CN103712898A (en) * | 2013-07-30 | 2014-04-09 | 戴艺 | Atmosphere suspended particulate matter mass concentration detector |
| CN103604732A (en) * | 2013-11-25 | 2014-02-26 | 中煤科工集团重庆研究院有限公司 | Integrated mechanism for collecting and measuring dust |
| CN103913406A (en) * | 2014-04-04 | 2014-07-09 | 北京西山新干线环保设备有限公司 | Automatic calibration method for beta absorption-type dust measurement instrument |
| CN103913406B (en) * | 2014-04-04 | 2016-01-27 | 北京西山新干线环保设备有限公司 | The absorption dust gauge automatic marking method of β |
| CN109085188A (en) * | 2018-07-31 | 2018-12-25 | 国政通科技有限公司 | Explosive particle detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |