Sample gas pipeline, made of glass material, of aerosol focusing gas circuit and manufacturing method of sample gas pipeline

Abstract

The invention discloses a sample gas pipeline of an aerosol focusing gas circuit in a real-time single aerosol particle detection and analysis instrument. The pipeline comprises a sample gas pipeline body made of glass material and a connecting installing flange, the installing and positioning are realized through tolerance fitting, a clamping ring is fixedly installed, an O-shaped ring or a sealant is used for sealing, the external circle of the sample gas pipeline is processed through a conventional optical processing method, an internal gas circuit through hole is formed through femtosecond laser processing, and the aperture of the through hole can reach micron dimension. The sample gas pipeline is capable of meeting design, assembling-calibrating and processing technology requirements; the processing and residual stress are small; the coaxiality, verticality, sealing and other design and assembling-calibrating requirements are easy to meet; and a pollution status and a cleaning status of the sample gas pipeline can be conveniently checked.

Description

technical field [0001] The invention relates to a sample gas pipeline for aerosol particle focusing gas path in a single aerosol particle real-time detection and analysis instrument and a manufacturing method thereof. Background technique [0002] Aerosol refers to multiple mixed systems formed by solid or liquid particles dispersed and suspended in a gaseous medium. The particle or particle size is 0.001-100 μm. It is customary to call these particles aerosols. [0003] Aerosol particles have an important impact on many physical and chemical processes such as earth-atmosphere radiation balance, cloud formation to rain, water cycle, and visibility changes, as well as human health. The types and sources of atmospheric aerosol particles are multiphase and complex in composition. Researchers need to identify particles and their sources based on their physical, optical or chemical characteristics. Therefore, real-time, in situ aerosol particle detection and analysis technique...

AI Technical Summary

Problems solved by technology

[0012] ①The sample gas pipeline is slender, with small wall thickness and easy to deform

If there is a deviation in the position of the sample gas pipeline during assembly, it is difficult to ensure the coaxiality with the sheath flow tube;

[0013] ②The sample gas pipeline is embedded on the inner circle of the sampling flange, and the fit is not easy to be tight. The quick-plug connector and the sampling flange are connected by threads, and the sealing effect of the whole structure is not good

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