Sediment pressure-holding sampler driven by hydrostatic pressure

Abstract

The invention relates to a sediment pressure-holding sampler driven by hydrostatic pressure. The prior device is limited in insertion depth, large and heavy in supporting frame. The sampler comprises an impact component, a flow distribution component, a driving component and a sampling tube component, wherein the impact component comprises an impact tube, a guide sleeve and an impact piston cylinder, the flow distribution component comprises a supporting tube and a flow distribution valve; the driving component comprises a driving piston cylinder and a driving piston; the sampling tube component comprises a guide tube, a pressure-holding tube, a sampling pipe and a pressure-replenishing hose; and the impact tube, the supporting tube, the impact piston cylinder, the guide tube, the pressure-holding tube and the sampling pipe are coaxially arranged. The sampler fully utilizes the huge energy of seawater hydrostatic pressure, injects sediment for sampling in a form similar to vibropiling, and can use the energy in subsequent sample pressure holding. Relative to the prior sampler, the sampler has the advantages of larger sampling depth under the same weight condition, obviously promoted sample collection rate and capability of performing truth-preserving sampling on hard sediment which cannot be sampled by gravity-type sediment truth-preserving samplers.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment, and relates to a drilling and coring suitable for various soft rock formations on the seabed, such as sediment, soil, frozen soil and ice, and especially suitable for a hydrostatic pressure-driven sediment protection system for sediment drilling and coring. pressure sampler. technical background [0002] Seabed sediments not only contain rich mineral resources but also record the history of the ocean. Therefore, for deep-sea sediment samplers, the ideal situation is: both soft and hard sediments can be collected; under the same weight of sampling equipment, the sampling Depth is as deep as possible; enables fidelity sampling. Some of the existing sediment samplers cannot maintain the original state of the sample, such as grab samplers, box samplers, and gravity sampling tubes; although some can sample sediments with fidelity, they can only be used for softer sediments. For sediment...

AI Technical Summary

Problems solved by technology

Some of the existing sediment samplers cannot maintain the original state of the sample, such as grab samplers, box samplers, and gravity sampling tubes; although some can sample sediments with fidelity, they can only be used for softer sediments. For sediment sampling, when used for hard sediment sampling, the insertion depth is limited (such as: CN02156223.7; CN200410089165.7; CN200510045536.6); for the vibration sampler, although it can carry out fidelity sampling to hard sediment , but its disadvantage is that the support frame is large and heavy, and it needs to be powered by the mother ship to drive the motor or hydraulic motor. When the working depth is large, the energy supply is troublesome

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