Deep sea cold spring fluid heat-preserving and pressure-maintaining sampler

Abstract

The invention relates to deep sea sampling, in particular to a deep sea cold spring fluid heat preservation and pressure maintaining sampler. The device comprises an outer cylinder structure and an inner cylinder structure, wherein the outer cylinder structure comprises an outer cylinder body, outer cylinder end covers are fixed to the two ends of the outer cylinder body respectively, the two outer cylinder end covers and the outer cylinder body form a closed cavity, the inner cylinder structure is arranged in the cavity, a sampling valve device is fixed to the outer wall of the end cover on one side of the outer cylinder body, and a sample injection channel communicated with the sampling valve device is arranged in the outer cylinder end cover on the side. By means of the technical scheme, in-situ temperature and pressure of a taken sample can be maintained and high fidelity of the taken sample is achieved, so that the sampling rate of a cold spring fluid sample can be effectively increased and the sample can be transferred conveniently. The device can adapt to the extreme environment of a deep sea cold spring, and technical and equipment supports are provided for research of a deep sea cold spring fluid ecological system and mineral resources.

Description

technical field [0001] The invention relates to deep sea sampling, in particular to a deep sea cold spring fluid heat preservation and pressure maintaining sampler. Background technique [0002] A deep-sea cold seep is a fluid that is basically the same temperature as the surrounding seawater, mainly composed of water, hydrocarbons, hydrogen sulfide or carbon dioxide, and produces physical, chemical and biological effects, and overflows from the seabed by gushing or seeping. At present, deep-sea samplers are usually used for thermal insulation sampling of deep-sea hydrothermal fluids. Most of the existing sampler designs for deep-sea cold seeps consider how to maintain the in-situ pressure of cold seep samples, but do not fully consider the impact of external temperature changes on microbial activity in cold seep samples. , the impact of gas solubility changes, when fluid microbial sampling is carried out in the cold seep area, it takes several hours to transfer the sample a...

AI Technical Summary

Problems solved by technology

At present, deep-sea samplers are usually used for thermal insulation sampling of deep-sea hydrothermal fluids. Most of the existing sampler designs for deep-sea cold seeps consider how to maintain the in-situ pressure of cold seep samples, but do not fully consider the impact of external temperature changes on microbial activity in cold seep samples. , the impact of gas solubility changes, when fluid microbial sampling is carried out in the cold seep area, it takes several hours to transfer the sample as the deep submersible rises. In the absence of insulation materials, the physical and chemical properties of the sample and the internal microbial activity will be Changes due to external temperature, making in situ sampling and onshore laboratory culture useless

[0003] In the prior art, the patent with the application number 201710984626.4 and the application name "a deep-sea pressure-holding organic matter sampler" mainly focuses on maintaining the sample pressure in the sampling area, ignoring the impact of the temperature change of the sample on the microbial activity and each group during the entire sampling transfer process. The influence of the physical properties; the application number is 201410624574.6, and the application name is "a high heat preservation effect hydrothermal sampler". The sample inlet and outlet of the patent sampling device are thin-walled tubular structures and do not share channels. There are too many openings on the end face, the interface is easy to burst and leak, and the sample is easily polluted by the infiltrated air and impurities, making in-situ sampling meaningless; Pressure-holding sampler" patent, application number is 201510028650.1, and the application name is "a water sampling device", the sampling device cannot be equipped with a detection device that can reflect the temperature and pressure changes of the sample taken in real time during the transfer process; application number 200310122819.7, the patented sampling device with the application name "A Handheld Deep-sea Hydrothermal Fidelity Sampler" is too heavy and difficult to disassemble during nitrogen filling and pressure relief, sample transfer and cleaning

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