A new pressure-holding sampler for abyssal sediments based on petal compression sampling

Abstract

The invention relates to the field of abyssal sediment sampling devices, in particular to a novel abyssal sediment pressure-holding sampler based on petal compression sampling. Including the main frame, the horizontal support plate in the middle of the main frame is fixed on the truss through the connecting piece, the lifting drive mechanism is set on the support plate, the sampling mechanism includes a sampling cylinder and a sampling piston, and the top of the sampling piston is connected to the lifting drive mechanism; The bottom end of the sampling piston is fixedly connected with the sampling cylinder, the sampling cylinder is provided with a sampling connecting rod, the top end of the sampling connecting rod is connected with the sampling piston, the bottom end is connected with the sampling cone head, and the bottom end of the sampling cylinder is fixedly connected with the sampling petal; The inner curved section is S-shaped; the pressure-holding mechanism includes a pressure-holding cylinder and an accumulator, one end of the pressure sensor is connected to the pressure-holding cylinder through a pipeline, and the other end is connected to the control cabin through a watertight connector, the underwater battery and the control system Fixed in the control cabin. The invention minimizes the disturbance of the sample during the sampling process.

Description

technical field [0001] The invention relates to the field of abyssal sediment sampling devices, in particular to a novel abyssal sediment pressure-holding sampler based on petal compression sampling. Background technique [0002] Deep-sea sediment sampling is one of the basic means for deep-sea environment and resource investigation. In recent years, deep-sea pressure-holding sampling technology has attracted more and more attention from the oceanographic community all over the world. The pressure-holding sampler can not only provide the most realistic samples for marine resources and environment research, but also discover new characteristics of nature through deep-sea biological research. Pressurized samples are required to study the impact of marine pollutants on deep-sea ecosystems, the diversity of marine extremophiles, and the foundation and development of important genetic resources. By carrying out research on deep-sea pressure-holding sampling technology and equip...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many sediment pressure-holding sampling devices at home and abroad, which are generally used for sampling long columnar sediments in the deep sea about 3000 meters. If it is too large, it is difficult to carry out pressure-holding sampling in the abyss area with a sea depth of 10,000 meters. This traditional sampling analysis method cannot maintain the pressure of the sample for a long time. The collected sediment samples are dissolved in the gas phase due to changes in pressure, light and other conditions The loss of components, the change of the oxidation state of variable valence ions, the decomposition of organic components, and the massive death of barophilic microorganisms make it difficult for the analytical data to accurately reflect the original composition and state of the sediment.

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