Bottom mud column-shaped sampling apparatus

Abstract

The invention discloses a column-shaped substrate sludge sampling device, and relates to collection of soil samples. The device is particularly suitable for collecting substrate sludge samples which are required to remain in original state though very loose. The device consists of a handle (1), a sample tube (2) and a sampling end (3); and the sampling end (3) comprises a rotating enclosed structure (4), a sampling end rear tube (6), a spring device (8), a sampling end front tip (9), a pin (7) and a tether (5). The invention is characterized in that during the process of pulling the sampling device out of the substrate sludge, the bottom part of the sampling tube is sealed tightly, so that the loose substrate sludge samples can be prevented from being washed away, and the gathered substrate sludge samples can be better remain in the original state. The device has the advantages of simple structure, convenient operation and the like, and can be widely applied to sampling of underwater substrate sludge and lake core sediment.

Description

technical field [0001] The invention relates to a soil sample collection device, which is especially suitable for sample collection under the condition that the material of the bottom mud is very loose and the original state of the sample must be kept. Background technique [0002] Underwater sediments and lake core sediments are of great significance for revealing environmental changes, sedimentary processes, and pollutant migration. The sampling often requires keeping the original sequence and sedimentary thickness of the samples 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. It is generally used to collect sediment surface samples; Sediment samples were obtained from the soil. Generally, the structure of the columnar sampl...

AI Technical Summary

Problems solved by technology

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. It is generally used to collect sediment surface samples; Sediment samples obtained from

Generally, the structure of the columnar sampler is relatively complicated. Usually, a vacuum pump and a pressure pump are used for sample collection. There are many, large volumes, external power supply is required, and the price is relatively expensive; some columnar samplers with simple structures usually lack effective sediment sealing devices at the bottom of the sampling tube. The problem of sample loss is more prominent when pulling out, and the sampling depth is difficult to quantify

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