Fully automatic subglacial sediment vibrating sampler

Abstract

The invention discloses a full-automatic vibrating sampler for subglacial deposits, which includes a control cabin, a vibration cabin and sampling pipe parts, wherein the control cabin is assembled on the upper part of the sampler body, and the control cabin is sleeved on the guide column through a sliding collar Above, the control cabin can slide up and down along the guide column driven by the sliding collar. The bottom of the guide column is connected to the top of the vibration cabin through a flange. The devices are connected, and power and control signals are transmitted to the vibration cabin through the deep-water cable control cabin, and the bottom of the vibration cabin is connected to the top of the sampling pipe part through a connecting piece. Beneficial effects: the risk of false triggering is greatly reduced, and the reliability of subglacial sediment sampling is increased. The overall radial size of the sampler is greatly reduced. The surface operation is relatively simple, which reduces the possibility of leakage in the underwater high-pressure environment. Accidents are less likely to occur. Save surface work time.

Description

technical field [0001] The invention relates to a sampler, in particular to a fully automatic vibrating sampler for sediments under ice. Background technique [0002] At present, Antarctic subglacial sediment samples are ancient sediments stored at the bottom of Antarctic ice shelves and ice sheets, containing millions of years of records of the Earth's environment and climate change. Obtaining subglacial sediments in Antarctica requires passing hundreds of meters or even thousands of meters of ice. The most convenient technical means is to drill through the ice layer with a hot water drilling system to form a hot water drilling pilot hole, and then deploy sampling equipment to carry out subglacial deposition. Sampling work. Since the diameter of the pilot hole of the hot water drill is usually 30-40cm, and there is a high shrinkage rate due to the low temperature in the sub-ice environment, the structure of the sampling equipment is required to be long and cylindrical. Co...

AI Technical Summary

Problems solved by technology

Vibration sampling utilizes the sediment vibration liquefaction mechanism, and achieves the penetration effect by reducing the adhesion resistance between the sampling tube and the sediment. The penetration depth and sampling length are usually better than the above three sampling methods, but the conventional ocean and lake samples Vibration sampling equipment vibrator parts and trigger mechanism have large radial dimensions, and it is difficult to drill pilot holes through hot water, so they cannot be directly applied to Antarctic subglacial sediment sampling

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