Negative pressure pneumatic type automatic sampler for water sample in medium-deep layer

Abstract

The invention discloses a negative pressure pneumatic type automatic sampler for a water sample in a medium-deep layer. The negative pressure pneumatic type automatic sampler comprises a sampling water storage chamber, a balance weight device and a gas-liquid tank, wherein a sampling hole is formed in the upper part of the sampling water storage chamber, a gas-liquid piston cylinder is arranged below the sampling hole, a liquid storage cavity of the gas-liquid piston cylinder is connected with the gas-liquid tank through a pipeline, an environmental pressure control valve is arranged on the pipeline, a balancing weight of the balance weight device is fixed on a balancing weight frame through a balancing weight fixed releasing control valve, the balancing weight fixed releasing control valve is connected with the gas-liquid tank through a water returning pipeline, a water returning control valve is arranged on the water returning pipeline, and a pressure trigger button matched with a water returning control valve is arranged at the bottom of the liquid storage cavity. The negative pressure pneumatic type automatic sampler submerges in water under the action of gravity of the balancing weight, so that the water sample in the medium-deep layer with the depth of below 10-30m is automatically acquired, the balancing weight is discarded, a device automatically returns and the acquired sample is brought out due to the adoption of an underwater negative pressure pneumatic technology.

Description

technical field [0001] The invention relates to a water sample sampler, in particular to a negative pressure pneumatic automatic sampler for middle and deep water samples. Background technique [0002] With the development of the ocean, the extraction technology of ocean water samples has been paid more and more attention. There are many ways to extract marine water samples. According to their working methods, there are mainly sampling methods such as artificial diving, pipeline pumping, and mechanical equipment diving. There are various problems in these sampling methods, such as sampling depth, sampling volume, whether sampling will cause pollution, and whether the scope of application is wide or not. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a reasonable design, easy to use device for diving under the action of gravity of the counterweight, and use underwater negative pressure pneumatic technology to re...

AI Technical Summary

Problems solved by technology

There are various problems in these sampling methods, such as sampling depth, sampling volume, whether sampling will cause pollution, whether the scope of application is wide, etc.

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