Undisturbed deep-scale sampling system for seabed sedimentary layer

Abstract

The invention discloses an undisturbed deep-scale sampling system for a seabed sedimentary layer, which comprises a sampling pipe mechanism, and the sampling pipe mechanism comprises a guide floral pipe, a heavy hammer, a sampling pipe, a lining pipe, a petal-type elastic sheet assembly and a knife edge; the lowering and recycling mechanism comprises a mooring rope connected with the heavy hammer; and the lowering and recycling mechanism drags the heavy hammer through the cable to lower the sampling pipe mechanism to the seabed and then release the traction force. The undisturbed deep-scale sampling system for the seabed sedimentary layer is simple and reasonable in structure and convenient to install and use. During sampling, disturbance to seabed sediment samples is small, and sample disturbance can be reduced or non-disturbance sampling can be achieved. The sampling depth is large, the rod-shaped heavy hammer strikes for 1-2 times during sampling each time, the sampling length can be controlled to be about 1m at one time, and the sampling depth can reach 40m after the operation is repeated. The length of the sample can be automatically calculated through the meter recording assembly. And large-area popularization and application are worthy.

Description

technical field [0001] The invention is applied in the technical field of seabed sediment sampling, and has wide application prospects in the technical fields of marine geological survey, marine environment survey, sedimentary evolution research and the like. Background technique [0002] Seabed sediment sampling is a means to obtain samples of seabed sediments at a certain depth. Different sampling equipment and sampling methods are selected according to the research purpose. [0003] At present, the most commonly used tools for sampling seabed sediments are gravity columnar samplers and vibratory columnar samplers. Gravity columnar sampling adopts the method of counterweight at the upper end of the sampling tube to increase the weight of the equipment. The fixed steel cable at the top of the gravity sampling tube is connected to the winch through a pulley, and the gravity sampler is retracted by the winch in forward and reverse directions. When sampling, the winch quickly ...

AI Technical Summary

Problems solved by technology

[0004] The sampling length of the gravity columnar sampler is short, which is greatly affected by the properties of the seabed. The sampling length of the muddy substrate is longer, and the sampling length of the sandy substrate is shorter. It is related to the nature of the bottom of the seabed. The sampling length of the muddy bottom is longer, and the sampling length of the sandy bottom is shorter. Generally, the sampling length is longer than that of the gravity columnar sampler, but the efficiency is lower than that of the gravity columnar sampler.

Generally speaking, the sampling length of these two samplers is limited by the equipment itself, and its structure and working principle cannot achieve undisturbed long-scale sampling. The general sampling length is between 0.5-3m

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