Hydraulic driven mechanical hand-held seafloor sediment truth-preserving sampler and sampling method

Abstract

The invention discloses a hydraulic driven mechanical hand-held seafloor sediment truth-preserving sampler and a sampling method. The sampler includes a hydraulic source, a pressure holding cylinder,a sampling tube, a flap sealing mechanism and an opening valve. The flap sealing mechanism is installed at the opening at the bottom of the pressure holding cylinder. The flap sealing mechanism comprises a flap valve base and a flap valve. The flap valve base is connected to the pressure holding cylinder in a seal connection way. The flap valve close to a valve hole is hinged to the flap valve base. A torsional spring is arranged between the flap valve and the flap valve base. A sampling tube is inserted into the pressure holding cylinder. The sampling tube is provided with a sampling tube piston fitting to the inner hole of the pressure holding cylinder. The sampling tube and the valve hole on the flap valve base are coaxial. A hydraulic source is connected to an oil inlet of an opening valve through a pipe. An oil outlet of the opening valve is connected to the through hole on the side wall of the pressure holding cylinder through a pipe. The top of the pressure holding cylinder is provided with a returning hole. The returning hole and the inner cavity at the flap valve installation position are communicated through a pipe. The hydraulic driven mechanical hand-held seafloor sediment truth-preserving sampler has a simple and compact structure and is easy to operate. Through the pressure holding cylinder, the sampling truth-preserving effects are ensured.

Description

technical field [0001] The invention relates to a seabed sampling device, in particular to a hydraulically driven mechanical hand-held seabed sediment fidelity sampler and a sampling method. Background technique [0002] There are a large number of microorganisms in seabed sediments. These microorganisms are an important way for humans to understand and study the evolution of life in the abyss and the changes in the seabed environment. Due to the special high-pressure and low-temperature environmental conditions of the seabed, the external environmental pressure and temperature fluctuations of microorganisms must be reduced as much as possible during the collection of seabed sediments, so as to avoid the impact of changes in external pressure and temperature on the life characteristics of barophilic and low-temperature microorganisms. However, the mechanical hand-held seabed sediment samplers used in most underwater operation equipment are all non-airtight pressure-holding s...

AI Technical Summary

Problems solved by technology

However, the mechanical hand-held seabed sediment samplers used in most underwater operation equipment are non-airtight pressure-holding samplers, which will have a great impact on the research on the life characteristics of pressure-loving and low-temperature microorganisms. Therefore, it is necessary to Develop a mechanical hand-held seabed sediment fidelity (holding pressure + heat preservation) sampler to provide high-quality seabed fidelity samples for scientific research on the life evolution of seabed microbial communities

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