Externally hanging type atmospheric aerosol aviation airflow guide cover of airplane

Abstract

The invention relates to an atmospheric aerosol aviation airflow guide cover and belongs to the technical fields of atmospheric environment sampling and analysis. The atmospheric aerosol aviation airflow guide cover comprises a buffer and a sampling pipe, wherein a sampling port is formed at one end of the sampling pipe; the sampling pipe runs through the bottom of an airplane and extends into the buffer; the other end of the sampling pipe is connected with a quick interface; the buffer comprises an air inlet, a buffering cavity and an air outlet which are connected with one another sequentially and hermetically; the buffering cavity is cylindrical; the air inlet has a frustum conical shape; and the diameter of the right port round of the frustum conical shape is 10 to 12 times that of the left port round. A sampler is adopted, high-speed airflow is buffered and reduced into low-speed airflow, and the low-speed airflow enters the sampling pipe through the sampling port, so that the high-speed airflow is prevented from directly entering the sampling pipe, aerosol granules are prevented from being adhered to the wall of a buffering tank, the collection rate of the atmospheric aerosol granules entering the sampling port is increased, and loss of the granules is reduced.

Description

technical field [0001] The invention relates to an air sampler, in particular to an aircraft-mounted air pollutant air deflector, which belongs to the technical field of atmospheric environment sampling and analysis. Background technique [0002] With the decline of air quality and the development of aviation technology, researchers at home and abroad have started to study the method of atmospheric sampling on airplanes—aero-sampling technology since the mid-1980s. The application of aerial sampling technology is conducive to understanding the air quality conditions at high altitudes and then studying the causes of air pollution. But at present, the air pollutant aerial observation sampler used has the disadvantages of high cost and complex operation. In addition, some scientific research and meteorological bureaus and other units purchase atmospheric pollutant aerial observation samplers from foreign companies for scientific research needs, and the size of these instrument...

AI Technical Summary

Problems solved by technology

None of these buffer collectors can collect rare aerosol particles high in the air

Chinese patent CN201000405Y (200720017689.4) discloses a novel atmospheric pollutant aerial observation sampler, the device includes a sample delivery tube, a buffer tank, an air sampling tube, an aerosol sampling tube, and one end of the sample delivery tube is provided with a sampling port, The other end communicates with one end of the buffer tank, the other end of the buffer tank communicates with the air sampling tube, and communicates with the aerosol sampling tube on the side wall of the buffer tank. The high-speed airflow enters the sampling tube from the sampling port and remains in the sampling tube. The same speed enters the buffer tank. After the gas slows down in the buffer tank, the gas enters the gas detector and the aerosol detector respectively from the air sampling tube and the aerosol sampling tube on the top of the column. Although this device has the function of collecting aerosol, but There are the following disadvantages: the direction of the nozzle of the sampling tube is relative to the flight direction of the aircraft, and the high-speed airflow impacts the sampling tube during the sampling process. The high-speed airflow easily makes aerosol particles adhere to the bend of the sampling tube, and the aerosol loss rate is very high. , resulting in inaccurate aerosol detection

In addition, the device is relatively large in the cabin and takes up a large space, which is not conducive to accommodating other atmospheric observation instruments inside the small aircraft

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