Dartlike type insulating and pressure retaining deepwater seabed sampling device

Abstract

The invention relates to a dart-type heat preservation and pressure maintaining deep-water seabed sampling device, which includes underwater components, above-water components, and a control system. The underwater components include a sampler and a lifting cable, and the above-water components include a retractable system, a lifting winch and Hydraulic power unit, the control system includes underwater control, water control and auxiliary components; the sampler includes a functional frame composed of a guide head, a gravity release mechanism, a pressure maintaining device, a heat preservation device, and a retracting cable device, and a cutting head, A sample coring device composed of a coring tube, a piston and a coring head; the retracting system includes an outboard pulley, a catching manipulator, and a reorientation system. The present invention can realize the sampling of the deep-water seabed through the dart-type thermal insulation and pressure-preserving deep-water seabed sampling device and its sampler, and can maintain the temperature and pressure of the sample taken in the original natural environment, so that the sample does not change its temperature after extraction. The state of matter does not destroy all aspects of the sample to ensure its research value.

Description

Technical field: [0001] The invention relates to an underwater sediment sampling system, in particular to a dart-type heat preservation and pressure deep seabed sampling device. Background technique: [0002] At present, the gravity piston samplers used by countries all over the world rely on their own weight. At a certain distance from the bottom of the water, they use lead balls to touch the bottom, use the decoupling release device to fall freely, and use the impact force to drill underwater sediments. The samplers in the prior art can only be used in shallow waters where the underwater pressure and temperature do not change much. However, there are some technical problems to be solved for the sampling of marine seabed sediments in deeper waters. In summary, there are the following three Aspects of the situation: [0003] 1. The underwater sediments in the shallow layer of the ocean seabed are natural gas hydrate samples. In the natural environment of low temperature and...

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Problems solved by technology

[0004] 2. When the sampler is sampling on the seabed of the ocean, due to the thick underwater sediment layer, the sampling depth is required to be large, and the distance from the free fall of the sampler to the seabed will increase, and some can reach hundreds of meters. A large number of disordered steel cables falling freely from the sensor will increase the resistance of the core and affect the sampling effect of the sampler, and it is related to the success or failure of the sample

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