Personal respirable dust sampling device

Abstract

The invention provides a personal respirable dust sampling device. The personal respirable dust sampling device comprises a sampling box, a filter screen, a sampling filter membrane and a driving device, wherein the sampling box is used for providing an installation space for a sampling component; the filter screen is installed inside the sampling box, comprises a rough filter screen used for filtering out particles exceeding the dust sampling standard, and a fine filter screen used for filtering dust conforming to the sampling standard in a grading manner; the sampling filter membrane is installed at one end of a gas outlet of the fine filter screen and is used for adsorbing filtered dust and is taken as an analysis sample of dust content; the driving device comprises a driving motor and a driving shaft which simultaneously penetrates through axle lines of the rough filter screen and the fine filter screen to drive the rough filter screen and the fine filter screen to simultaneously rotate. According to the device, the technology of combination of impact type separation and a double-layer conical surface filter screen is adopted, the dusty environment is sampled, large granular dust can be separated firstly by utilizing the rough filter screen, and then respirable dust conforming to the regulations of a BMRC sampling efficacy curve is separated by utilizing the fine filter screen, so that the sampling precision is improved.

Description

technical field [0001] The invention relates to a personal respirable dust detection device, in particular to a dust sampling device which can be easily carried, arranged on the outside of a human body work helmet, and can perform on-site respirable dust sampling as required. Background technique [0002] In mining operations, miners are exposed to two serious occupational hazards. One is respirable dust. Its existence leads to the deterioration of the production environment. The human body inhales mineral dust for a long time, causing an increase in the incidence of respiratory tract and lung inflammation, and further develops into respiratory tract cancer and pneumoconiosis; the other is radioactive radon and its daughters. Radon-induced lung cancer is a random effect of ionizing radiation, and its occurrence rate is related to the cumulative dose of long-term inhalation of radon and its progeny. Exposure to radon and its progeny is the first environmental cause of lung ca...

AI Technical Summary

Problems solved by technology

The main disadvantage of the impact dust separation is similar to the cyclone separator. After the separation of the large particle dust and the respirable dust, it is in a chamber. Because the shaking and inversion of the individual sampling head cannot be avoided, the respiratory dust will fall off the filter membrane or the large particle dust will be blown up. Deposited on the filter membrane after starting, introducing a large sampling error

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