Optical path switching apparatus used in large spray field laser particle analyzer, and use method thereof

Abstract

The invention discloses an optical path switching apparatus used in a large spray field laser particle analyzer, and a use method thereof. The apparatus comprises pedestal columns, a rotary middle shaft, shading sleeves, optical path centralizers, fastening bolts and shading sleeve columns, wherein the pedestal columns and the rotary middle shaft are arranged in a two end fitting manner to make the rotary middle shaft freely rotate under the supporting of a pedestal at two ends; the optical path centralizers and the rotary middle shaft are arranged in a fitting manner through fit holes to make the optical path centralizers freely rotate on the rotary middle shaft; all rotation fitting positions are provided with the fastening bolts, and the fastening bolts are fastened when rotating parts reach proper positions to fix the rotating parts; and the shading sleeves are fixedly arranged on the rotating middle shaft through the columns, and rotate with the rotary middle shaft. The apparatus and the split spray field laser particle analyzer are used in a fitting manner, so rapid switching between background test and sample test can be conveniently realized; and more importantly, sampling measurement of the local spray area of a large spray field can be carried out, so the problem of too high droplet granularity measurement concentration of the large spray field is effectively solved.

Description

technical field [0001] The invention relates to the field of spray head atomization performance evaluation, belongs to the technical equipment related to the measurement of droplet particle size in large flow and large coverage spray fields, and is used in conjunction with spray laser particle size analyzers, in particular to a laser particle size analyzer for large spray fields Optical path switching device and usage method. Background technique [0002] The diameter of the spray droplets, that is, the particle size of the droplets, is one of the key indicators for evaluating the atomization effect of the spray head. In the design, development and technical verification process of the spray head, it is necessary to measure the particle size of the atomized droplets formed by the spray through the experimental test method to verify the technical characteristics of the spray head. Particle size distribution measurement using a laser particle size analyzer is a commonly used ...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcoming of prior art, solve practical problem, provide a kind of optical path switching device and using method for laser particle size analyzer of large-scale spray field, the present invention solves the problem of high droplet concentration in large-scale spray field and The problem of rapid switching between backgrou

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