Loose sediment sampler

Abstract

The invention relates to a sampling device, in particular to a loose sediment sampler. It includes a first sampling barrel, a sliding mechanism, a connecting spring, a second sampling barrel, a sampling outer cover, a sampling end cover, a sampling inner cover, a bottom cover plate, a pressure relief hole, etc., and a pressure relief hole is provided at the center of the upper end cover. The sliding mechanism is set on the outside of the first sampling barrel and can slide up and down along the outer cylindrical surface of the first sampling barrel. The outer cylindrical surface of the first sampling barrel is sequentially provided with grooves and initial position lines, Terminate the position line, the sampling outer sleeve is set outside the sampling inner sleeve. Beneficial effects: the device is simple in structure and easy to operate, and the number of sampling barrels can be increased or decreased according to needs, and the bottom of the sampling device can be tightly sealed during the process of pulling out from the sediment, which can effectively prevent the loss of loose sediment samples, and the collected samples It can better maintain the original properties, and the internal and external pressure difference is consistent, which reduces the difficulty of sampling and improves the sampling efficiency.

Description

technical field [0001] The present invention relates to a sampler, in particular to a loose sediment sampler. Background technique [0002] Stratigraphic sediments, lake core sediments, etc. are of great significance for revealing environmental changes, depositional processes, and pollutant migration. Sampling often needs to keep the original sequence and sedimentary thickness of the sediments as well as possible. At present, sediment samplers are mainly divided into two types: grab type and column type. The grab-type sampler has a simple structure, but it has large disturbance to the sample, limited sampling depth, and has the problem of sample loss due to low airtightness. Obtain sediment samples. Generally, the structure of the columnar sampler is more complicated. Usually, the vacuum pump and the pressure pump are used for sample collection. When the sampler is pulled out, the pressure pump is used to expand the rubber to seal the bottom end of the sampling tube, so th...

AI Technical Summary

Problems solved by technology

The grab sampler has a simple structure, but it has a large disturbance to the sample, the sampling depth is limited, and there is a problem of sample loss due to low airtightness. It is generally used to collect surface samples of sediments; Sediment samples obtained from

Generally, the structure of the columnar sampler is relatively complicated, and a vacuum pump and a pressure pump are usually used for sample collection. When the sampler is pulled out, the pressure pump expands the rubber to seal the bottom of the sampling tube, so the original shape of the sample can be better maintained. However, this type of device There are many components, large volume, external power supply is required, and the price is relatively expensive; some cylindrical samplers with simple structures usually lack an effective sediment sealing device at the bottom of the sampling tube, which makes loose sediment more prominent when the sampler is pulled out sample loss problem

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