Hydraulic driven in-situ air-keeping sampler for seabed sediment

Abstract

The invention belongs to a sampling device, and in particular relates to a hydraulically driven in-situ gas-retaining sampler for lower layer sediments, which includes a casing assembly, a cutter head is arranged at the lower end of the casing assembly, a tail lifting block is arranged at the upper end of the casing assembly, and the casing assembly A liner assembly that can slide along its inner wall is arranged inside, a sealing ball valve is connected to the casing assembly through a flange, and a hydraulic drive device for switching the sealing ball valve is arranged on the upper part of the casing assembly. The sampler of the present invention utilizes a hydraulic device to drive a sealing ball valve to realize sealing, and the closing automation degree is high, and the reliability is good, which ensures the strict sealing of samples and improves the success rate of sampling. In addition, since the liner assembly consists of at least two liner units, the samples therein can be stored in sections, so as to better understand the layered structure of the sediment.

Description

technical field [0001] The invention belongs to a sampling device, in particular to an in-situ air-retaining sampler driven by a hydraulic drive for lower sediments. Background technique [0002] At present, the samplers used in deep-sea sediment sample collection in my country mainly use two types: grab type and box type, and the representativeness of sampling is poor. The utility model with the patent No. 02291870.1 published on December 10, 2003 introduces a deep-sea sediment pressure-holding sampling device without boundary disturbance, which includes the following two parts: [0003] Frame components: including hanging bracket, central rod, frame top cover, accumulator, cross, frame support feet, hanging bracket and the upper end of the central rod, the central rod can slide freely through the center hole of the frame top cover, and the lower end Fixed connection with the cross; two accumulators and two sampling cylinders are symmetrically installed on the cross, which...

AI Technical Summary

Problems solved by technology

[0011] The limit and sealing design of the sampler with this structure involves too many structures, is too complicated, and is not easy to control. In particular, its sealing is realized by closing the lower sealing flap with a steel wire rope. In the harsh seabed environment, the reliability of closing is not good. High, easy to cause sampling failure

Moreover, such a complex sealing structure also limits the sampler to collect samples for multiple stratification, which is not conducive to a more detailed analysis of the layered structure of the sediment. At the same time, it also increases the weight of the sampler and reduces the effective use of its internal space.

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