A combined water and soil sampler and method suitable for shallow seas

Abstract

A water and soil combined sampler and method suitable for shallow seas, including a water collection control device in the center of the frame, the drive shaft of the stepping motor passes through the upper support plate, and drives the drive plate and the stopper on the lower surface; the control rod passes through the Through the perforation of the support plate, and hang on the surface of the support plate through the hook, the stopper and the hook at the upper end of the control rod are in the same ring, and the control rod can be moved at different water depths to achieve the purpose of water collection; the water collection bottle is equipped with upper and lower The two bottle caps are connected together by a rubber band passing through the inside of the water collection bottle; two ends of the three-pronged fishing line are respectively tied to the tops of the two bottle caps, and the remaining end is buckled on the control rod; the mud mining device includes a support rod, a piston, mud pipe. The method includes that according to the seawater pressure, when the specified water collection level is reached, the stepper motor makes the control rod slip, and then the water collection bottle is closed to take water; relying on gravity, the mud collection pipe is pressed into the seabed surface for soil sampling. The invention innovatively uses the cover-type water collecting device and the mud collecting pipe together, the principle structure is simple, and the operation is convenient and fast. The invention integrates two functions of water mining and mud mining, realizes synchronous collection of seabed surface columnar samples in the process of water mining, and saves ship time.

Description

technical field [0001] The invention relates to a sampler, in particular to a water and soil combined sampler and method suitable for shallow seas. Background technique [0002] With the rapid development of my country's marine industry, offshore marine engineering activities are becoming more and more frequent, and it is particularly important to study sediment transport in river and sea estuaries and the properties of seabed sediments. There are many methods for studying sediment transport in rivers and sea estuaries, such as on-site water collection and in-situ observation. The simplest and most direct method is in-situ water collection. It is divided into card cover type water collection device and ball valve type water collection device. It is suitable for lakes and relatively calm sea areas. It has strict requirements on water flow and is difficult to use in the strong hydrodynamic sea area of ​​​​the Yellow River estuary. It is also difficult to obtain distance measur...

AI Technical Summary

Problems solved by technology

In-situ static penetration testing equipment is greatly affected by sea conditions, water depth, etc., and at the same time, the equipment is expensive, the structure is complex, and the scope of application is relatively narrow; columnar sample analysis has become the most widely and applicable method for analyzing the properties of seabed sediments, but columnar sample analysis This method also has its limitations. In view of the "iron plate sand" phenomenon in the Yellow River estuary, the sediment columnar samples in the surface layer 0-1m contain less viscosity, and the friction between it and the inner wall of the drill pipe is difficult to support its falling gravity. Drilling and sampling are difficult to obtain sediment samples of the surface layer 0-1m, so it is urgent to solve such engineering and scientific problems

Images