Particulate matter sampler with changeable filter membrane

Abstract

The invention relates to a particulate matter sampler with changeable filter membrane. The particulate matter sampler comprises a casing; a filter membrane storage mechanism, a first slider mechanism,a second slider mechanism and a third slider mechanism are mounted in the casing. The filter membrane storage mechanism is fixed to a supporting table and comprises a refrigerating cavity, a filter membrane barrel which hasn't been used for sampling and a filter membrane barrel which has been used for sampling; the filter membrane barrel which hasn't been used for sampling and the filter membranebarrel which has been sampling are arranged in the refrigerating cavity side by side. The first slider mechanism, the second slider mechanism and the third slider mechanism are all provided with photoelectric encoders. The first slider mechanism is connected with the filter membrane barrel which hasn't been used for sampling, the second slider mechanism is connected with the filter membrane barrel which has been used for sampling, and the third slider mechanism is mounted on a membrane changing platform transversely and disposed above the filter membrane storage mechanism. The membrane changing platform is provided with a membrane supply port, a recovery port and a membrane changing claw; the membrane supply port corresponds to the filter membrane barrel which hasn't been used for sampling in position, the recovery port corresponds to the filter membrane barrel which has been used for sampling in position, and the membrane changing claw is connected with the third slider mechanism. The particulate matter sampler has the advantages of high precision in automatic changing of the filter membranes, high positioning accuracy and high precision of sample data.

Description

technical field [0001] The invention relates to a particle sampler with a small flow rate, in particular to an automatic membrane-changing particle sampler. Background technique [0002] The small flow particle sampler is an instrument that usually captures PM10, PM2.5 and other particles of different particle sizes in the ambient atmosphere at a constant flow rate of 16.67L / min through the membrane weighing method. It is suitable for the field of environmental monitoring. In terms of sampling and analysis of ambient air, and manual comparison and verification of automatic monitoring instruments for ambient air particulate matter. [0003] At present, the small flow particle sampler is mainly staffed on duty, and the filter membrane needs to be replaced manually on site. When continuous long-term sampling or multi-membrane interval sampling is required, it will bring a lot of repetitive labor to the operator and greatly increase the cost. The labor intensity of the operator...

AI Technical Summary

Problems solved by technology

[0003] At present, the small flow particle sampler is mainly staffed on duty, and the filter membrane needs to be replaced manually on site. When continuous long-term sampling or multi-membrane interval sampling is required, it will bring a lot of repetitive labor to the operator and greatly increase the cost. The labor intensity of the operators. For the sampling unit, on-site duty also increases the input of personnel. Moreover, the existing small-flow particle sampler is relatively heavy. Since the sampling location of the instrument is not fixed, the operator needs to carry it frequently. Increase the work intensity of the operator

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