Modular multi-level time-series deep-sea sediment pore fluid sampler and method

Abstract

The invention relates to a modularized multi-level time series deep-sea sediment pore fluid sampler and its method, comprising a penetrating probe rod, the penetrating probe rod is provided with a pressure-resistant chamber on the top of the casing at the uppermost end, and the top surface of the pressure-resistant chamber is embedded and installed There are two watertight connectors, and the connecting piece includes a columnar body and an annular boss protruding from the middle of the columnar body. The center of the columnar body is provided with a through signal transmission channel, and the columnar body is provided with a through columnar body in the circumferential direction of the signal transmission channel. The upper and lower pore fluid channels, and the upper and lower ends of the pore fluid channels are respectively threaded with open sampling bottles, and the ring boss is provided with a fixed channel communicating with the pore fluid channel, and the control valve is installed in the fixed channel and the ring boss A metal filter is embedded in the fixed channel, and the wire interface of the control valve is arranged in the signal transmission channel and electrically connected with the master control system through the wire. Based on the bluetooth communication technology, the present invention can realize large-capacity, high-fidelity and high-efficiency sample collection.

Description

Modular multi-level time series deep-sea sediment pore fluid sampler and method technical field The present invention relates to the technical field of seabed geological exploration, be specifically related to a kind of modular multi-level time series deep-sea subsidence Accumulation pore fluid sampler and method. Background technique In the water-soil interface area across marine sediments and bottom seawater, complex physical, chemical, biological and Substance reactions and frequent substance exchanges. Pore ​​fluids (pore water and pore gas) are the important link between seafloor sediments and bottom seawater. It is an important place for physical, chemical and biological reactions inside the sediments, and it is also the interface between the water-soil interface of the deep seabed. main medium of mass exchange. Study and understanding of the changes in the properties of pore fluids at and near the ocean water-soil interface to reveal the ocean The evolutio...

AI Technical Summary

Problems solved by technology

Laboratory sampling method Due to the great temperature and pressure difference between the deep seabed and the laboratory environment, gas escape, component variation, and ion price change in the pore fluid will be caused during the sampling process, and it is difficult to truly reflect the original information of the pore fluid; in situ The sampling method can realize the in-situ collection of pore fluids in the real deep-sea environment, and can preserve the original information of the pore fluids to the greatest extent. It is the optimal sampling method for the pore fluids of deep-sea sediments. There are problems such as poor sampling persistence, small sample collection volume, poor container airtightness and low sampling efficiency

[0004] Chinese patent application CN108344597A discloses a simple-to-operate deep-sea sediment pore water in-situ automatic collection device, but the device needs to be operated by the mechanical arm of the deep-sea submersible or ROV, the sampling cost process is complicated, the sample collection volume is small, and the sampling low efficiency

However, the sampling bottle of this device is easily affected by external pressure, and the original information of the pore water sample cannot be preserved, which has a great impact on the data quality

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