Turnover type unconsolidated sediment sampling device

Abstract

The invention relates to a sampling device and in particular to a turnover type unconsolidated sediment sampling device which comprises a sampling end cover, a first sampling cylinder, a steel wire rope, a second sampling cylinder and a sampler, wherein the lower end of the sampling end cover is mounted at the upper end of the first sampling cylinder; the lower end of the first sampling cylinder is in threaded connection with the upper end of the second sampling cylinder; the lower end of the second sampling cylinder is in threaded connection with the upper end of the sampler; the upper end ofthe steel wire rope is connected with the sampling end cover; the lower end of the steel wire rope is connected with the sampler. The sampling device has the beneficial effects of being simple in structure and convenient to operate, requirements of different sampling depths can be met by increasing and decreasing the number of the second sampling cylinders according to sampling depths, the sampling cylinder can be divided into two parts, morphology of a sample is not damaged when being taken out from the sampling cylinder, and thus a relatively complete columnar sample can be taken; when sediment is pulled out, the bottom of the sampling device can be tightly sealed, so that loss of an unconsolidated sediment sample is effectively prevented, and original properties of a taken sample can be relatively well maintained.

Description

technical field [0001] The invention relates to a sampling device, in particular to a flip-type loose sediment sampling device. Background technique [0002] Loose sediments such as sand and mud are of great significance for revealing environmental changes, depositional processes, and pollutant migration. The sampling often requires keeping 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 a large disturbance to the sample, the sampling depth is limited, and there is a problem of sample loss due to low airtightness. Used to collect surface samples of sediment; columnar samplers are used to obtain sediment samples by inserting vertically into the sediment. Generally, the columnar sampler has a complex structure and a large volume, and requires an external power supply and is relatively expensi...

AI Technical Summary

Problems solved by technology

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 a large disturbance to the sample, the sampling depth is limited, and there is a problem of sample loss due to low airtightness. Used to collect surface samples of sediment; columnar samplers are used to obtain sediment samples by inserting vertically into the sediment

Generally, the columnar sampler has a complex structure and a large volume, and requires an external power supply and is relatively expensive; some columnar samplers with simple structures usually lack an effective sediment sealing device at the bottom of the sampling tube, so that loose sediment is pulled out when the sampler is pulled out. At the same time, the sampling cylinder of the traditional sampler cannot be disassembled, which inevitably destroys the shape of the sample when it is taken out of the sampling cylinder, and it is difficult to obtain a relatively complete columnar sample.

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