CN203798704U - Novel direct-reading type dust concentration measuring instrument verification and calibration device - Google Patents

Novel direct-reading type dust concentration measuring instrument verification and calibration device Download PDF

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Publication number
CN203798704U
CN203798704U CN201420209999.6U CN201420209999U CN203798704U CN 203798704 U CN203798704 U CN 203798704U CN 201420209999 U CN201420209999 U CN 201420209999U CN 203798704 U CN203798704 U CN 203798704U
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CN
China
Prior art keywords
air
dust concentration
air duct
electronic flow
dust
Prior art date
Application number
CN201420209999.6U
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Chinese (zh)
Inventor
张洋
贾旭光
于艳娟
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徐州市计量检定测试中心
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Application filed by 徐州市计量检定测试中心 filed Critical 徐州市计量检定测试中心
Priority to CN201420209999.6U priority Critical patent/CN203798704U/en
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Publication of CN203798704U publication Critical patent/CN203798704U/en

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Abstract

The utility model relates to a novel direct-reading type dust concentration measuring instrument verification and calibration device. The device comprises a dust air cylinder, one end of the air cylinder is provided with an air inlet, and the outer portion of the air inlet is provided with a dust feeding device. The other end of the air cylinder is sealed and provided with a centrifugal fan, and the portion, 3-4 meters away from the air inlet, in the air cylinder is provided with a testing segment. The side wall of the air cylinder is provided with a placement opening, and the placement opening is provided with a sealing door. The device further comprises a standard sampler and an electronic flow meter. The electronic flow meter is in circuit connection with the standard sampler, and a sensor of the electronic flow meter and a sampling head of the standard sampler are arranged at the position located on the testing segment in the air cylinder. The sampling head is provided with a filtering membrane. The air cylinder is internally provided with an air speed sensor which is connected with a control circuit of the centrifugal fan, and the device controls the sampling time of the sampler, and it is ensured that the sampler stops conducting sampling before critical saturation of the filtering membrane. The electronic flow meter can directly read the size of dust, the calculating step is omitted, and the verification accuracy of a dust concentration measuring instrument is fully ensured.

Description

Novel direct-reading dust concentration measuring instrument calibrating apparatus

Technical field

The utility model relates to a kind of calibrating apparatus of dust concentration tester, is specifically related to a kind of novel direct-reading dust concentration measuring instrument calibrating apparatus.

Background technology

Dust refers to and is suspended in airborne consubstantiality particulate, is one of principal element keeping global warming, and dust too much or very few in atmosphere all will produce disastrous effect to environment.But in live and work, industrial dust is the natural enemy of human health, be the one of the main reasons of bringing out various diseases, particularly Mine Dust, serious harm workman's is healthy on the one hand, causes workman to suffer from pneumoconiosis; The danger of the too high blast that also lies dormant of dust concentration on the other hand.The annual casualties quantity causing because of dust disaster is very big, has also caused huge economic loss to country., need to monitor dust concentration for the strict dust concentration of controlling this, the equipment using is dust concentration tester, and the therefore quality of measuring instrument and accuracy is that the maximum of effectively measuring dust concentration ensures.

That dust atmosphere is set in air duct to the calibrating of dust concentration monitor at present, utilize dust concentration tester and a set of verification system to measure dust concentration simultaneously, again both are contrasted, whether thereby it is qualified to examine and determine this dust concentration tester, the calibrating of conventional dust concentration tester and the controllability of calibrating installation are poor, operate comparatively complicated, the accuracy of impact calibrating.

Utility model content

In order to address the above problem, the utility model proposes a kind of novel direct-reading dust concentration measuring instrument calibrating apparatus, utilize the sampling time of electronic flow-meter control sampling thief, thereby ensure that the critical saturated sampling thief before of filter membrane stops sampling, and, electronic flow-meter can directly read the volume of dust, has saved calculation procedure, has fully ensured the calibrating accuracy of dust concentration tester.

The utility model solves the technical scheme that its technical matters adopts: a kind of novel direct-reading dust concentration measuring instrument calibrating apparatus, comprise cylindric dust air duct, and one end of described air duct is provided with horn-like air inlet, and air inlet outside is provided with to dirt device; The other end sealing of described air duct, and centrifugal fan is installed, the position that the interior distance air inlet of air duct is 3~4 meters is made as test section; Described air duct sidewall, the position that is positioned at test section is provided with the placement mouth that can put into dust concentration tester, places mouth and is provided with hermatic door; This calibrating apparatus also comprises standard sample device and the electronic flow-meter of tape timer, described electronic flow-meter is connected with the circuit of standard sample device, the sampling head of the sensor of electronic flow-meter and standard sample device is located at the position that is positioned at test section in air duct, and sampling head is provided with filter membrane; In air duct, be provided with air velocity transducer, air velocity transducer is connected with the control circuit of centrifugal fan, controls the rotating speed of blower fan.

Described is that pressurized air is sent out dirt device to dirt device, and pressurized air is sent out the air inlet of sending out the corresponding air duct of dirt mouth of dirt device.

The beneficial effects of the utility model are: a kind of novel direct-reading dust concentration measuring instrument calibrating apparatus, utilize the sampling time of electronic flow-meter control sampling thief, thereby ensure filter membrane critical saturated between sampling thief stop sampling, and, electronic flow-meter can directly read the volume of dust, save calculation procedure, fully ensured the calibrating accuracy of dust concentration tester.

Brief description of the drawings

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Accompanying drawing 1 is a kind of structural representation of novel direct-reading dust concentration measuring instrument calibrating apparatus.

In figure, 1. to dirt device, 2. air duct, 3. centrifugal fan, 4. places mouth, 5. standard sample device, 6. electronic flow-meter, 7. dust concentration tester, 8. air velocity transducer.

Embodiment

In the accompanying drawings, a kind of novel direct-reading dust concentration measuring instrument calibrating apparatus, comprises cylindric dust air duct 2, and one end of described air duct 2 is provided with horn-like air inlet, and air inlet outside is provided with to dirt device 1; The other end sealing of described air duct 2, and centrifugal fan 3 is installed, the interior position apart from 3~4 meters of air inlets of air duct 2 is made as test section; Described air duct 2 sidewalls, the position that is positioned at test section is provided with the placement mouth 4 that can put into dust concentration tester 7, places mouth 4 and is provided with hermatic door; This calibrating apparatus also comprises standard sample device 5 and the electronic flow-meter 6 of tape timer, described electronic flow-meter 6 is connected with the circuit of standard sample device 7, the sampling head of the sensor of electronic flow-meter 6 and standard sample device 5 is located at the position that is positioned at test section in air duct 2, and sampling head is provided with filter membrane; In air duct 2, be provided with air velocity transducer 8, air velocity transducer 8 is connected with the control circuit of centrifugal fan 3, controls the rotating speed of blower fan.

Describedly send out dirt device to dirt device 1 for pressurized air, pressurized air is sent out the air inlet of sending out the corresponding air duct 2 of dirt mouth of dirt device.

Using method of the present utility model is: open centrifugal fan 3, send out dirt device spray into dust by sending out dirt mouth to air duct 2 with even speed by pressurized air, now the wind speed in air duct 2 is controlled at 1.5m/s left and right, forms stable dust atmosphere.After dust concentration in air duct 2 is stable, (quality is m on sampling head, to put into load weighted filter membrane 1), unlocking electronic flowmeter 6 and standard sample device 5 simultaneously, sampling thief carries out dust sampling, electronic flow-meter 6 is measured dust volume and shows simultaneously, the numerical value of measuring when electronic flow-meter 6 arrives its setting upper in limited time, electronic flow-meter 6 quits work, and standard sample device 5 is quit work.The filter membrane taking off on sampling head is weighed, and quality is (m 2), obtain sampling time t by timer, obtain sampling volume v by electronic flow-meter 6; Then use formula c 2=(m 2-m 1)/v calculates the sampled concentrations of standard sample device 5.Put into tested dust concentration tester 7 by placing mouth 4 simultaneously, read dust instrument indicating value c now 1, contrast c 2and c 1can find out that whether dust concentration tester 7 exists error, uses formula can draw error amount.

In above operating process, can directly read dust volume by electronic flow-meter 6, without calculating separately, save the time, improve its accuracy; Electronic flow-meter 6 plays control action to the start-stop of standard sample device 5 simultaneously.Known, if the absorption of filter membrane filter reaches capacity, will make testing result produce error, and electronic flow-meter 6 makes filter membrane before reaching capacity, i.e. the work of stopping criterion sampling thief 5, has avoided the generation of this situation, reduce error, can effectively ensure the accuracy of calibrating.

Claims (2)

1. a novel direct-reading dust concentration measuring instrument calibrating apparatus, is characterized in that, comprises cylindric dust air duct (2), and one end of described air duct (2) is provided with horn-like air inlet, and air inlet outside is provided with to dirt device (1); The other end sealing of described air duct (2), and centrifugal fan (3) is installed, the position that the interior distance air inlet of air duct (2) is 3~4 meters is made as test section; Described air duct (2) sidewall, the position that is positioned at test section is provided with the placement mouth (4) that can put into dust concentration tester (7), places mouthful (4) and is provided with hermatic door; This calibrating apparatus also comprises standard sample device (5) and the electronic flow-meter (6) of tape timer, described electronic flow-meter (6) is connected with the circuit of standard sample device (7), the sampling head of the sensor of electronic flow-meter (6) and standard sample device (5) is located at the position that is positioned at test section in air duct (2), and sampling head is provided with filter membrane; In air duct (2), be provided with air velocity transducer (8), air velocity transducer (8) is connected with the control circuit of centrifugal fan (3).
2. the novel direct-reading dust concentration measuring instrument calibrating apparatus of one according to claim 1, is characterized in that, describedly sends out dirt device to dirt device (1) for pressurized air, and pressurized air is sent out the air inlet of sending out the corresponding air duct of dirt mouth (2) of dirt device.
CN201420209999.6U 2014-04-28 2014-04-28 Novel direct-reading type dust concentration measuring instrument verification and calibration device CN203798704U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420209999.6U CN203798704U (en) 2014-04-28 2014-04-28 Novel direct-reading type dust concentration measuring instrument verification and calibration device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420209999.6U CN203798704U (en) 2014-04-28 2014-04-28 Novel direct-reading type dust concentration measuring instrument verification and calibration device

Publications (1)

Publication Number Publication Date
CN203798704U true CN203798704U (en) 2014-08-27

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CN201420209999.6U CN203798704U (en) 2014-04-28 2014-04-28 Novel direct-reading type dust concentration measuring instrument verification and calibration device

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CN (1) CN203798704U (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104237095A (en) * 2014-10-13 2014-12-24 北京市环境保护科学研究院 Rising dust discharge measurement system and method in road sweeping process
CN104535464A (en) * 2014-12-04 2015-04-22 苏州国环环境检测有限公司 Apparatus for detecting particles in air
CN104596904A (en) * 2015-01-30 2015-05-06 武汉四方光电科技有限公司 Measurement method for dust concentration of laser dust sensor
CN105865994A (en) * 2016-04-22 2016-08-17 苏州翰霖汽车科技有限公司 Calibration device for PM2.5 sensors and calibrating method thereof
CN106497782A (en) * 2016-09-30 2017-03-15 中国科学院深圳先进技术研究院 A kind of air microorganism sampling device
CN106644965A (en) * 2016-12-05 2017-05-10 锦州海伯伦汽车电子有限公司 Batch calibration detection apparatus and method of dust sensor
CN109060456A (en) * 2018-07-13 2018-12-21 中国环境科学研究院 A kind of caliberating device and method of fixed source diluting channel sample device
CN109142178A (en) * 2018-10-26 2019-01-04 常熟市德虞矿山机电有限公司 A kind of calibration method of direct-reading dust concentration detector

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104237095A (en) * 2014-10-13 2014-12-24 北京市环境保护科学研究院 Rising dust discharge measurement system and method in road sweeping process
CN104535464A (en) * 2014-12-04 2015-04-22 苏州国环环境检测有限公司 Apparatus for detecting particles in air
CN104596904A (en) * 2015-01-30 2015-05-06 武汉四方光电科技有限公司 Measurement method for dust concentration of laser dust sensor
CN104596904B (en) * 2015-01-30 2017-05-10 武汉四方光电科技有限公司 Measurement method for dust concentration of laser dust sensor
CN105865994A (en) * 2016-04-22 2016-08-17 苏州翰霖汽车科技有限公司 Calibration device for PM2.5 sensors and calibrating method thereof
CN106497782A (en) * 2016-09-30 2017-03-15 中国科学院深圳先进技术研究院 A kind of air microorganism sampling device
CN106497782B (en) * 2016-09-30 2019-03-01 中国科学院深圳先进技术研究院 A kind of air microorganism sampling device
CN106644965A (en) * 2016-12-05 2017-05-10 锦州海伯伦汽车电子有限公司 Batch calibration detection apparatus and method of dust sensor
CN106644965B (en) * 2016-12-05 2020-05-26 锦州海伯伦汽车电子有限公司 Device and method for batch calibration detection of dust sensors
CN109060456A (en) * 2018-07-13 2018-12-21 中国环境科学研究院 A kind of caliberating device and method of fixed source diluting channel sample device
CN109060456B (en) * 2018-07-13 2020-06-16 中国环境科学研究院 Calibration device and method for fixed source dilution channel sampler
CN109142178A (en) * 2018-10-26 2019-01-04 常熟市德虞矿山机电有限公司 A kind of calibration method of direct-reading dust concentration detector

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140827

Termination date: 20160428