Gas circuit system for measuring tail gas smoke intensity of diesel vehicle

Abstract

The invention relates to the technical field of environmental monitoring instruments and particularly provides a gas circuit system for measuring tail gas smoke intensity of a diesel vehicle, which comprises a sampling system, a double-air curtain chamber and an air cleaning system, wherein the sampling system comprises a sampling head, a sampling pipeline, a constant flow pump, a throttle and an air flow converting electromagnetic valve which are sequentially connected; the sampling system is used for collecting tail gas; the double-air curtain chamber comprises a main air curtain channel formed by an axial fan, and an air curtain channel of a lens chamber formed by positive pressure clean gas; the air cleaning system comprises an air purifier, an air suction pump and an air purifying pipeline which are sequentially connected; the air cleaning system is used for cleaning an optical system and is also used for cleaning and measuring the optical channel when an instrument is in a non-measurement state. In the invention, the constant flow pump is adopted for pumping the tail gas into a smokemeter measuring unit for ensuring the longer distance transport of the tail gas and on-line measurement of the smoke intensity; the throttle is adopted for ensuring stable flow rate of the tail gas and precise measurement of the smoke intensity; and the air cleaning system is adopted for ensuring the cleanness of the optical system and enhancing the measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring instruments, in particular to the technical field of diesel vehicle exhaust smoke measurement. Background technique [0002] As one of the most important means of transportation in modern society, motor vehicles have brought great convenience to people's life and work, but the tail gas emitted by motor vehicles has also become another atmospheric pollution besides soot-type air pollution. source of pollution. Correspondingly, the total amount of pollutant emissions from motor vehicles is rising rapidly. Major cities across the country are seriously polluted by motor vehicle exhaust. It is of great significance to protect the living environment of human beings by detecting the pollution of motor vehicle exhaust. [0003] With the increase of motor vehicles and the improvement of people's environmental awareness, my country has formulated a series of national standards such as GB...

AI Technical Summary

Problems solved by technology

During the driving process of diesel vehicles, due to the complex road environment, the exhaust emission is affected by many factors, so the emission is very complicated

Exhaust emissions have not been able to be monitored in real time due to sampling issues

The technology of real-time online sampling of diesel vehicle engine emissions has not been reported yet

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