Piston transfer type deep sea sediment pressure holding sampler

Abstract

The invention discloses a piston transfer type deep sea sediment pressure holding sampler which comprises a mechanical structure part and a sample transfer pressure holding part; the mechanical structure part mainly comprises a pressure holding cylinder, a sampling cylinder and a push rod, a motor drives the push rod to drive the sampling cylinder for sampling, the upper end of the pressure holding cylinder and the sampling cylinder are sealed by a sealing ring, the lower end of the pressure holding cylinder is provided with a sloped surface and a wedge-shaped block, a motor screw is used to drive the wedge-shaped block to move along the sloped surface to seal the lower end of the pressure holding cylinder, the sample transfer pressure holding part mainly includes a high-pressure pump andtwo ball valves, the pressure holding cylinder, the two ball valves and a culture tank are connected in sequence, high-pressure water with pressure similar to that in the sampling cylinder is injectedinto each space through the high-pressure pump, and finally a sample is transferred to the culture tank while the pressure is maintained. The piston transfer type deep sea sediment pressure holding sampler can be mounted on a deep-sea submersible device and performs in-situ sediment sampling, realizes the pressure-holding transfer of the sample through the unique structural design, does not require an additional transfer mechanism for complicated cooperation, saves cost, and can improve sample transfer efficiency.

Description

technical field [0001] The invention belongs to the technical field of deep-sea sampling, and relates to a pressure-holding sampler, in particular to a piston transfer type deep-sea sediment pressure-holding sampler, which can realize pressure-holding sampling and pressure-holding transfer of deep-sea sediments. Background technique [0002] With my country's investment in the development of deep-sea exploration, in order to enable domestic researchers to obtain high-fidelity sediment samples for detection and analysis, it is particularly important to develop sediment samplers with pressure-holding sampling and pressure-holding transfer. However, some of the current samplers that can achieve pressure-holding acquisition are often due to their large volume and weight. After the sediment sample is depressurized, the part is taken out for detection and analysis, and the in-situ characteristics of the pressure-holding sample cannot be guaranteed. Or it is necessary to connect an...

AI Technical Summary

Problems solved by technology

However, some of the current samplers that can achieve pressure-holding acquisition are often due to their large volume and weight. After the sediment sample is depressurized, the part is taken out for detection and analysis, and the in-situ characteristics of the pressure-holding sample cannot be guaranteed.

Or it is necessary to connect and cooperate with the secondary pressure-holding sediment sampler for secondary sampling, which increases the complexity of the system and the cost of the entire system. At the same time, the increase in the intermediate transfer process will also make the pressure maintenance unstable. , which is not conducive for researchers to accurately obtain the in situ properties of sediments

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