Overlying deposit sampler

Abstract

The invention provides an overlying deposit sampler. The sampler comprises extending-and-contracting buttons, an extending-and-contracting rod, a first clamping block, a second clamping block, a sampler horizontal extension section, a sampling box and a vertical support rod, wherein the extending-and-contracting rod can extend and contract a sampler and can be disassembled at any time and in any place; the extending-and-contracting rod is fixed through the first clamping block and the second clamping block before and after sampling closing; the sampler horizontal extension section facilitates lifting and pulling operation; the sampling box is used for collecting collected bottom mud samples and reducing interference of the sampler with the bottom mud samples; the vertical support rod controls a steel plate to be opened and closed through the effect of the first clamping block, the second clamping block and a spring, and the sampler is closed through the steel plate after sampling is completed, so that it is guaranteed that the sampling box in the sampler is located in a closed space, and disturbance and mixing of the deposit samples are reduced; through sawteeth on the sampler, sampling difficulty is greatly lowered, so that the sampler can be adapted to more sampling environments. The overlying deposit sampler has the advantages of being easy to operate, low in cost, convenient to disassemble and carry, great in disturbance resistance, high in sampling stability and capable of controlling the sampling depth flexibly.

Description

technical field [0001] The invention relates to a device for sampling surface sediments in complex water environments, in particular to a surface sediment sampler. Background technique [0002] Sediment monitoring is an important part of water environment investigation and scientific research. Underwater sediment contains a large amount of environmental and climate information, and is an important sample for studying climate and environmental changes. Therefore, undisturbed surface sediment collection is of great significance for the development of research work on heavy metal pollution, bioturbation, nutrient flux, and denitrification. [0003] Currently known sediment samplers in my country are mainly divided into grab-type sediment samplers and columnar sediment samplers. The grab sampler is used to collect surface sediments. When sampling, the grab is opened to sink into the sediment by its own gravity, and then the grab is pulled by a rope to close to collect the sedim...

AI Technical Summary

Problems solved by technology

Grab-type sediment samplers are usually used to collect underwater surface sediments. However, when the sampler is lifted from the water surface after collection, it is easy to cause disturbance and mixing of the collected surface sediments, and it may even be caused by the grab The device opened during the lift-off process, causing part of the sample to fall

[0004] The biggest disadvantage of the current grab-type sediment sampler is that it relies on artificial throwing and inserts the sampler into the sediment with the help of its own weight, it is difficult to control its sampling depth, and it has a certain degree of blindness; The grab is opened and closed by the weight of the bucket itself, but the opening and closing effect is often not very good, and it is easy to cause the sediment to fall during the lift-off process.

However, the nylon cover is not a completely closed space, and there will always be some interference with the sediment, and its stability cannot be determined by lifting up with the retractable rope. Disturbance and mixing of surface sediments

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