Shunting protection dry window and dry test system

Abstract

The invention discloses a shunting protection dry method window which comprises a sample window body, two optical glass windows, a sample spraying pipe and a shunting body; the sample window body is internally provided with an air flow cavity for air flow to pass through; the two optical glass windows are oppositely arranged on the left and right side walls of the sample window body, and a test area is formed between the two optical glass windows; the sample spraying pipe is vertically arranged in the airflow cavity in a penetrating manner and used for sample circulation, and a sample spraying opening is formed in the tail end of the sample spraying pipe and faces the test area; the extension direction of the shunting body is consistent with the axial direction of the sample spraying pipe, and the shunting body is wide in middle and narrow in two ends, is arranged at one end, close to the sample spraying outlet, of the sample spraying pipe and is positioned in the airflow cavity. The invention further discloses a dry-method testing system. A dry-method window is ingenious in structure, an optical glass window is effectively protected from being polluted by sample dust particles by arranging the shunting body in front of the sample ejection port and ingeniously utilizing the shape characteristic that the middle part of the shunting body is wide and the two ends of the shunting body are narrow, then background noise in the testing process is reduced, and the accuracy of a sample granularity test result is improved.

Description

technical field [0001] The invention relates to the technical field of particle size analysis instruments, in particular to a split flow protection dry method window and a dry method test system. Background technique [0002] In the traditional micro-powder industry, most samples can be tested by the dry method test system. The dry method test system can intelligently change the dispersion energy for various regular or irregular, fragile or agglomerated samples, different particle densities and different distribution widths. The input can neither break the particles, but also fully disperse the agglomerated samples, and transport the samples evenly and representatively to the test area. [0003] The laser particle size analyzer dry test system consists of a test host, a sample injection device, a sample nozzle, an optical glass window, and a dust collection device, among which the optical glass window is used as the test medium (including powder samples) to separate it from ...

AI Technical Summary

Problems solved by technology

[0004] However, when the existing dry test system is actually used, the dust particles in the sample mixed with high-speed airflow will directly contact and rub against the surface of the optical glass window, resulting in surface scratches or contamination of the optical glass window. Scratches and pollution not only greatly increase the background noise of the test, but also affect the accuracy of the sample particle size test results

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