Intelligent air automatic sampler for occupational health

An automatic sampling and hygienic technology, applied in the direction of sampling devices, etc., can solve the problems of dust affecting the airtightness of the gas path, corroding the solenoid valve, and easy cross-contamination of the absorption bottle

Active Publication Date: 2012-06-20
JILIN ELECTRIC POWER RES INST LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many defects in using this atmospheric sampler for occupational health sample collection: one, the solenoid valve is a steel product controlled by an electromagnet, and the occupational health collection site is mostly a factory, a workshop, and there is a high concentration of acid or Alkaline gas corrodes the solenoid valve; second, the solenoid valve generally requires a high degree of cleanliness for the medium. When collecting dust samples, fine dust is easy to enter the solenoid valve and affect the airtightness of the gas circuit; third, the air sampler connected in parallel The multiple absorption bottles are connected by the same gas path in turn, and cross-contamination between the absorption bottles is easy, which affects the accuracy of sample collection
In addition, GB / T160.29-2004 "Determination of Inorganic Nitrogenous Compounds in Air Toxic Substances in the Workplace" issued by the Ministry of Health requires the use of two absorption bottles connected in series to complete sample collection, while the Chinese invention patent (application number 201010174255.1) discloses This atmospheric sampler does not meet this requirement

Method used

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  • Intelligent air automatic sampler for occupational health
  • Intelligent air automatic sampler for occupational health
  • Intelligent air automatic sampler for occupational health

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]Detect the content of hydrogen chloride in the atmosphere: when working, insert the absorption tube into the air inlet and air outlet on the control valve 3 in sequence, and under the control of the single-chip microcomputer 6, the program starts to run. After the data initialization is completed, the air inlet connecting pipe 2 is automatically switched To (the switching process is completed by the single-chip microcomputer by controlling the roller and the forward and reverse motor inside the control valve 3) the air inlet 311, the air outlet connecting pipe 4 is automatically switched to the air outlet 311 ', and the single-chip microcomputer 6 controls the opening of the air inlet 311 to start The air pump 7 (JH-606 electric air pump) collects data, while collecting atmospheric samples, the flow sensor 5 (JKY / 4008-50SLpm / 314724 flow sensor) is used to calculate and control the sampling flow rate to 0.5L / min, after 15 minutes of sample collection , stop the air pump 7,...

Embodiment 2

[0025] Detection of NH in the atmosphere 3 Content: when working, insert the absorbing pipe into the air inlet and air outlet on the control valve 3 in turn, under the control of the single-chip microcomputer 6, the air inlet connecting pipe 2 is not connected with the air inlet 321, 341, 361, 381, The air inlet holes 321, 341, 361, 381 are connected to the air outlet holes 311', 331', 351' and 371' respectively, and the connection between the air outlet holes 311', 331', 351' and 371' to the atmosphere is closed. The program starts to run, and after the data initialization is completed, the air inlet connecting pipe 2 automatically switches to the air inlet 311, the air outlet connecting pipe 4 automatically switches to the air outlet 321', and the control valve 3 controls the opening of the air inlet 311 and the air outlet 321' to absorb The pipe 31 and the absorption pipe 32 are connected in series, start the suction pump 7 to collect data, and use the flow sensor 5 to calc...

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PUM

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Abstract

The invention belongs to the technical field of automatic air sampling apparatuses, and particularly relates to an intelligent air automatic sampler for occupational health, which is program controlled, and can perform constant flow, continuous, equal time interval, absorption tube connected in series, and fixed-point real-time high-precision sampling. The intelligent air automatic sampler mainlycomprises an air inlet connecting pipe, an air outlet connecting pipe, a control valve with air inlets and air outlets, absorption tubes, a flowrate control sensor, a single chip and a suction pump. The program set by the single chip is used for controlling the opening / closing of the suction pump, the flowrate of the flowrate control sensor, the connection between the air inlet connecting pipe and the air outlet connecting pipe and the air inlets and the air outlets, the opening / closing of each air inlet or each outlet, and sampling time. The sampler enables the two neighboring absorption tubes to be connected in series, so as to satisfy the collecting requirements of different types of occupational health samples.

Description

technical field [0001] The invention belongs to the technical field of automatic air samplers, and in particular relates to an intelligent automatic air sampler for occupational hygiene that adopts program control and can perform constant flow, continuous, equal time intervals, series absorption tubes, fixed-point real-time and high-precision. Background technique [0002] As the occupational health department has higher and higher requirements for the production site and testing and evaluation work, the actual testing work in the daily testing or evaluation testing process of the production unit or technical service organization that has obtained self-inspection authorization needs to be carried out within a working day cycle. Continuous tracking detection or daily fixed-period detection on the same detection point. These samples are parallel samples, and other conditions should be exactly the same except for the sampling period. However, manual sampling cannot achieve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24
Inventor 杨晓瑛朱宝余张赫林海丹
Owner JILIN ELECTRIC POWER RES INST LTD
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