Layered bottom sampler for marine ecosystem research

Abstract

The invention relates to the technical field of bottom samplers and in particular to a layered bottom sampler for marine ecosystem research. The layered bottom sampler comprises a sampling inner cylinder and a sampling outer cylinder sheathed outside the sampling inner cylinder. The sampling inner cylinder and the sampling outer cylinder are fastened through fastening screws. Outer side of the sampling outer cylinder is sheathed with a screwing column. The sampling outer cylinder is rotatably installed in the screwing column. While the screwing column is rotated, the sampling outer cylinder can keep a non-rotating state. Interference to settlings in marine sediment layering and sampling work is reduced. The outer side of the screwing column is spirally provided with a spiral wheel. A center of the upper end of a screwing column cover at the top of the screwing column is connected with a rotating shaft of a screwing motor. The exterior of the screwing motor is provided with a sealing housing. The upper end of the interior of the sealing housing is provided with a storage battery. A center of the top of the sealing housing is provided with a hanging hook. The hanging hook is connected with a lifting rope winding receiving-releasing device through a lifting rope. The layered bottom sampler is capable of performing the marine sediment layering and sampling work in low interference,and completely acquiring a deep marine sediment sample.

Description

technical field [0001] The invention relates to the technical field of mud pickers, in particular to a layered mud picker for marine ecosystem research. Background technique [0002] With the increasing dependence of human beings on the ocean, the research on the marine ecosystem has become more and more in-depth in recent years. In marine ecosystem research, the collection of marine sediment samples is the basis for studying the accumulation process of marine water pollution and the level of pollution risk, so there are relatively many studies on sediment investigation. In the investigation of marine sediments, it is necessary to sample the sediment bottom mud. The sampling is divided into non-stratified sampling and stratified sampling. Since the formation of sediments has obvious timing, sediments at different depths indicate the ecology of the region in different years. features, stratified sampling is therefore particularly important. [0003] At present, tools such a...

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Problems solved by technology

[0003] At present, tools such as shovels can be used to obtain sediment samples in shallow water areas in layered sampling; grab mud samples or column mud samples are often used in deep water areas. Obviously, tools such as shovels have limited conditions and cannot obtain deep water sediments. generally only shallow sediments of more than ten centimeters on the surface can be collected by the grab dredger

The columnar dredger is the main equipment for layered sediment collection at present, but the current columnar dredger mainly relies on the gravity of the dredger itself to smash the sediment. This collection method has a lot of interference and is easy to damage the surface sediment. Physical structure; it is impossible to collect samples with high seabed density and deep layers, and it is difficult to meet the needs of seabed layered sampling in the current marine ecosystem research

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