Automatic film change apparatus

Abstract

The invention discloses an automatic film change apparatus. The apparatus comprises an upper disc, a supporting column, a lower disc and a rotating disc, the upper disc and the lower disc are fixedly connected through the supporting column, the lower surface of the lower disc is fixedly provided with a stepping motor, the stepping motor drives the rotating disc to horizontally rotate between the upper disc and the lower disc, and the upper disc is provided with a photomultiplier tube used for positioning the rotating disc. The automatic film change apparatus comprises a charging station, a working station and blanking station, the rotating disc is uniformly provided with three film clamping holes, and the film clamping holes respectively correspond to the charging station, the working station and the blanking station. A plurality of film clamps can be arranged in a charging cylinder once, and only one-time arrangement is needed without manual replacement in the process, so the experiment continuity is guaranteed, the operation is simple, the sealing property is good, the time is saved, and the experiment quality and the experiment efficiency are greatly improved.

Description

technical field [0001] The invention relates to the technical field of environmental experiment devices, in particular to an automatic membrane changing device. Background technique [0002] With the development trend of ambient air pollution monitoring work, the monitoring of particulate matter has developed from coarse particulate matter to fine particulate matter monitoring. Inhalable particulate matter (PM10, PM2.5), known as the number one killer of human beings in the air, carries heavy metals, acid oxidation Toxic and harmful pollutants such as pollutants, bacteria, viruses, and polycyclic aromatic hydrocarbons enter the upper and lower respiratory tracts of people, and have a significant impact on human health. [0003] There are man-made and natural sources of particulate matter. Man-made sources mainly come from industrial and agricultural production and people's lives, especially coal combustion and vehicle exhaust; natural sources mainly include soil, dust and s...

AI Technical Summary

Problems solved by technology

In order to grasp the content of inhalable particulate matter (PM10, PM2.5) in the ambient air, the staff of the School of Environmental Science and Engineering of Peking University, in the experiment of filtering the gas in the air, due to the pollution of the filter membrane, it needs to be replaced regularly and every day The monitoring is not less than 18 hours. Therefore, it takes a long time for the personnel to replace the filter membrane artificially, which brings inconvenience to the experiment.

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