CN2204045Y - Filtration film directly sampling and weighing instrument for dust in the air - Google Patents
Filtration film directly sampling and weighing instrument for dust in the air Download PDFInfo
- Publication number
- CN2204045Y CN2204045Y CN 94207499 CN94207499U CN2204045Y CN 2204045 Y CN2204045 Y CN 2204045Y CN 94207499 CN94207499 CN 94207499 CN 94207499 U CN94207499 U CN 94207499U CN 2204045 Y CN2204045 Y CN 2204045Y
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- dust
- sampling
- weighing
- electronic balance
- circuit
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Abstract
The utility model relates to a filtration film sampling and directly automatic weighing fast dust measuring instrument, which belongs to an environmental protection monitoring instrument. The dust measuring instrument is composed of a micro motor, a swirl type pump, an electric measurement flowmeter, a clutch of a sampling filtration membrane component, an accurate electronic balance, an integrated display, a digital flowrate regulating circuit, a motor impulse bound and speed regulation circuit and a regulated power supply. Automation control and computer technology are applied. Air-electric circuit closed-loop control is used for ensuring constant airflow. The special accurate electronic balance of dust sampling can directly process weighing, measurement control, data processing, calculation and display integrally. After the dust sampling, the dust is directly transmitted to weighing, calculating and displaying. The flowrate, the gas volume, the dust weight and the dust concentration are arranged in time.
Description
The utility model relates to a kind of filter membrane sampling dust gauge of directly weighing, and is a kind of quick dust gauge, belongs to the environment monitoring instrument.
The quick dust gauge of at present existing several other principles comes into operation, as: photoelectric method, β rays method or quartz crystal resonance method etc., but the result of these method tests has limitation, therefore stipulate for monitoring method in China's " standard for atmosphere environment quality ", the monitoring suspended particulates should use filter membrane sampling, the gravimetric method monitoring.The result that aforementioned other method records can only play reference role, and can not be as the formal basis of estimating of atmosphere dustiness.
Till now, have only the sampling thief that uses filter membrane sampling, after the sampling filter membrane sent into the laboratory and handle, weigh and calculate after draw dust content of air, as formal evaluation basis, but this method is difficult to obtain fast evaluation result.And need the round-the-clock time sight of a kind of energy at present, focus on the dust measuring instrument that data and teletransmission meet above-mentioned standard method again in real time.
Along with the development of measurement technology, we can make micro-electronic balance, add some automatic test machine structure, have made the fast automatic dust gauge of filter membrane sampling electronic-weighing become possibility.
The utility model is to provide a kind of filter membrane sampling that satisfies above-mentioned all requirement quick dust gauge of directly weighing.
The purpose of this utility model is achieved in that (seeing Figure of description) drives turbulence type pump (2) with micromotor (1) and bleed, and air communication is crossed sampling membrane assembly arrangement of clutch (4) sampling on the gas circuit mouth.Use automatic control technology and computer technology, transfer wide range speed control circuit (10) and micromotor (1) to use CPU(9 the electrical measurement flowmeter (having another name called vortex shedding flow meter) (3), digital flow regulating circuit (6), the motor pulses that are series in the gas circuit) closure, constitute gas circuit-circuit closed loop automatic control system.Calendar time, sampling time information are provided by electronic clock (7).Numeral is set, displaying contents is selected to be keyed in by tactile keyboard (8) with order.The integrated display (11) that calendar time, sampling time, flow, gas volume, dust weight, dust concentration are made up of six charactrons shows.Sampling time is passed through CPU(9 by electronic clock (7)) in the operation software control.Dust gauge is powered by stabilized voltage supply (13).The power work situation is exercised supervision by integrated display (11) charactron duty.Stabilized voltage supply (13) input can be selected for use arbitrarily by among three kinds of 50Hz220V or 110V or the 38V.Sampling time finishes, close down micromotor (1), turbulence type pump (2), start electromagnetic clutch device (2.1), sampling membrane assembly arrangement of clutch (4) action, make its first half (2.3), latter half of (2.2), filter membrane component (2.4) three separates, heating wire net's drying unit (2.5) energising is heated and is dried the dust filter membrane, begin the weight of weighing filter membrane component (2.4) simultaneously with the precise electronic balance (2.6) of interface board, and CPU(9 is sent weighing result in constant duration ground) in the data field of program, and compare with weighing result last time, the difference of subtracting each other for twice when front and back are adjacent just writes this value under the relevant variable of data field during less than set-point, delivers to integrated display (11) simultaneously and shows.Turbulence type pump (2) counter-rotating, blow down filter membrane component (2.4) and go up dust, weighing filter membrane component (2.4) weight also writes the data field, electromagnetic clutch device (2.1) outage then, first half (2.3) and latter half of (2.2) of sampling membrane assembly arrangement of clutch (4) close up, heating wire net's drying unit (2.5) outage, precise electronic balance (2.6) outage of the band interface board state of deactivating, start micromotor (1), turbulence type pump (2), begin the sampling of next working cycle.
Accompanying drawing is a structural representation of the present utility model.
Because gas circuit-circuit closed loop is controlled automatically, the employing that PID regulates has guaranteed to adjust automatically when the sampling process gas-flow resistance changes pulse width, change the rotating speed of micromotor, turbulence type pump, and then having changed the dynamics of bleeding, the influence of real-Time Compensation change in resistance guarantees that the air-flow constant current is stable.
Owing to used computer technology, installed CPU(9 additional) (chip) this link, can utilize at CPU(9) in the program of operation to measured flow-time, frequency-the data on flows point set is tabled look-up, interpolation, quafric curve approximate algorithm are done data processing, and the hysteresis of consideration gas circuit, can accurately calculate the gas volume that in the sampling time scope, flows through gas circuit apace, calculating sampling front and back filter membrane component weight difference is dust weight, and then calculates the dust concentration value.Wherein:
Dust concentration=dust weight (mg)/gas volume (m
3)
Dust weight=sampling back filter membrane component heavy (mg)-sampling front filter assembly heavy (mg)
Gas volume=air-flow is flow (m in the unit interval
3/ min) * time (min)
Annex, host box, precise electronic balance, stabilized voltage supply are packed in the portable braces case in the lump.Volume is little, in light weight, easy to use, quick, dust sampling check weighing process does not need the people to intervene automatically to carry out.Method for measuring weight and measurement result degree of accuracy meet national Specification.
Claims (2)
1, a kind of filter membrane sampling quick dust gauge of directly weighing, comprise micromotor (1), turbulence type pump (2), sampling membrane assembly arrangement of clutch (4), precise electronic balance (2.6), it is characterized in that electrical measurement flowmeter (3), digital flow regulating circuit (6), motor pulses accent wide range speed control circuit (10) and micromotor (1) with CPU (9) closure, constitute a gas circuit-circuit closed loop automatic control system and a real-time Weighing system.
2, dust gauge according to claim 1, it is characterized in that wherein comprising precise electronic balance (2.6), drying unit (2.5), sampling membrane assembly (2.4), and have that dust sampling, filter membrane component are dried, weighed, the sampling membrane assembly of operating function closes sub-agencies automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94207499 CN2204045Y (en) | 1994-03-22 | 1994-03-22 | Filtration film directly sampling and weighing instrument for dust in the air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94207499 CN2204045Y (en) | 1994-03-22 | 1994-03-22 | Filtration film directly sampling and weighing instrument for dust in the air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2204045Y true CN2204045Y (en) | 1995-07-26 |
Family
ID=33825812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94207499 Expired - Fee Related CN2204045Y (en) | 1994-03-22 | 1994-03-22 | Filtration film directly sampling and weighing instrument for dust in the air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2204045Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403661B (en) * | 2005-08-30 | 2011-01-05 | 华南师范大学 | Filter membrane component automatic feeding apparatus of atmosphere particulate monitoring instrument |
| CN103115803A (en) * | 2013-01-16 | 2013-05-22 | 吉林省电力有限公司电力科学研究院 | Dust sampling and incremental control system |
| CN103776661A (en) * | 2012-10-18 | 2014-05-07 | 南京白云化工环境监测有限公司 | Automatic sampler for dust |
| CN105300830A (en) * | 2015-11-03 | 2016-02-03 | 大余县东宏锡制品有限公司 | Automatic environment air quality monitoring system |
| CN106770983A (en) * | 2017-03-01 | 2017-05-31 | 西安科技大学 | A kind of mine laneway flow of flue gas simulated testing system and method |
-
1994
- 1994-03-22 CN CN 94207499 patent/CN2204045Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403661B (en) * | 2005-08-30 | 2011-01-05 | 华南师范大学 | Filter membrane component automatic feeding apparatus of atmosphere particulate monitoring instrument |
| CN103776661A (en) * | 2012-10-18 | 2014-05-07 | 南京白云化工环境监测有限公司 | Automatic sampler for dust |
| CN103115803A (en) * | 2013-01-16 | 2013-05-22 | 吉林省电力有限公司电力科学研究院 | Dust sampling and incremental control system |
| CN103115803B (en) * | 2013-01-16 | 2015-08-19 | 吉林省电力有限公司电力科学研究院 | A kind of dust sampling incremental control system |
| CN105300830A (en) * | 2015-11-03 | 2016-02-03 | 大余县东宏锡制品有限公司 | Automatic environment air quality monitoring system |
| CN106770983A (en) * | 2017-03-01 | 2017-05-31 | 西安科技大学 | A kind of mine laneway flow of flue gas simulated testing system 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 |