Deep ocean water pressure-retention sampling device based on controllable one-way valve cascaded structure

Abstract

The invention provides a deep ocean water pressure-retention sampling device based on a controllable one-way valve cascaded structure, which belongs to the field of an ocean technological instrument. Two controllable one-way valves (an electromagnetic one-way valve and a manual one-way valve) are reversely arranged in a pipeline at the front end of a sampling cylinder in serial connection to realize pollution-free sampling, pressure-retention sampling and sample constant-pressure transferring; the way for additionally arranging a pressure compensation cylinder behind a sample cylinder realizes the continuous and mutation-free compensation to the pressure of a sample cavity; a method for filling a space between a sampling piston and a compensation piston with clean seawater and processing a throttling hole in the center of a connection body, pressure-mutation-free sampling is realized; and a one-way valve assembly and a choke plug are installed on an end cover of the compensation cylinder, so that the reliability of the sampling device is improved. All static connection in the sampling device is sealed by virtue of an O-shaped ring end surface, so that the sealing performance of the sampling device is improved. The deep ocean water pressure-retention sampling device is compact in structure, fewer in accessory equipment, simple in a sampling triggering signal and particularly suitable for being equipped with an AUV (Autonomous Underwater Vehicle) to collect deep ocean water samples.

Description

technical field [0001] The invention relates to a sampler, in particular to a deep-sea seawater pressure-holding sampler suitable for an autonomous underwater vehicle (AUV) based on a series structure of controllable one-way valves. Background technique [0002] The deep sea is an extreme environment of low temperature, high pressure, and low dissolved oxygen. Compared with shallow sea and terrestrial organisms, deep-sea organisms have special adaptation mechanisms and correspond to special genetic resources. How to obtain high-fidelity deep-sea microbial samples has become the focus of research in various countries. Because many valuable microorganisms in the deep sea are barophilic microorganisms, they cannot grow or even die under normal pressure. Therefore, pressure-holding sampling of deep-sea seawater is the technical basis for deep-sea microbial sampling. [0003] At present, a series of deep-sea water extractors have been developed for different mission requirement...

AI Technical Summary

Problems solved by technology

However, the following problems exist in the process of using the one-way valve to achieve pollution-free and pressure-holding sampling: in order to prevent the upper layer of seawater from polluting the sample seawater, the one-way valve is required to prevent the external seawater from entering the sampling cylinder before sampling; in order to prevent the leakage of sample seawater after sampling, The one-way valve is required to prevent the sample seawater in the sampling cylinder from flowing out of the cylinder after sampling; at different stages of sampling, the working direction of the one-way valve is different, so that it is difficult to realize a single one-way valve

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