A New Type of Sediment Sampler

Abstract

The invention discloses a sediment sampler, which comprises a cylindrical sampling tube and a connection rack which is fixed at the top of the cylindrical sampling tube, and the edge at the top of the cylindrical sampling tube is provided with a guiding port, and the bottom of the cylindrical sampling tube is installed with a sampling head; the upper part of the sampling head is provided with a mud feeding plate, the mud feeding plate is opened with mud feeding apertures, and each mud feeding aperture is provided with a spring; the inner cavity of the cylindrical sampling tube is matched and installed with a piston head, the lower end of the piston head is opened with a channel section at a position which is corresponding to the piston head, the channel section is installed with a filter disc, and the top of the piston head is fixed and installed with a piston push rod; the connection rack is opened with a through hole C from which the piston push rod can pass through, the top of the connection rack is connected with a connecting rod, and the upper end of the connecting rod is connected with a handle; the connecting rod is opened with a through hole in a radial direction, the piston push rod is opened with a through hole B in a radial direction, and the through hole A and the through hole B are aligned, and fixed bolt is inserted into the through holes, thereby ensuring connection between the piston push rod and the connecting rod. The sampler can prevent sediment leakage during the sampling process, and preliminarily dehydrate and adjust the acquisition amount.

Description

technical field [0001] The invention belongs to bottom mud sampling equipment in water areas such as river courses and lakes, and in particular relates to a novel bottom mud sampler. Background technique [0002] Once the sediment of rivers and lakes is polluted, it will become the internal pollution source of the water body and affect the water body environment for a long time. In order to study the migration, transformation and accumulation process of pollutants in the water body and sediment, and its impact on the water environment, it is necessary to drill undisturbed sediment samples at different depths from underwater to detect the pollutant content. [0003] At present, the existing mud sampling equipment at home and abroad mainly includes grab sampler, drilling type and columnar extraction type. [0004] The traditional columnar extraction method mainly has the following problems in the sampling process: [0005] 1. Due to the relatively large amount of water in th...

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Problems solved by technology

[0005] 1. Due to the relatively large amount of water in the sediment obtained by sampling, the sample volume is large and it is not easy to carry, especially when the sampling volume is large

Moreover, it is easy to mix mud and water during transportation, and it will be more difficult to dehydrate some samples after mixing.

In addition, water is the medium in which many reactions occur, and it has properties similar to a shock reactor during transportation, which will accelerate the release of certain components in the sediment into the water layer, resulting in inaccurate test data

[0006] 2. Difficulty in extracting sediment or leakage of sediment is prone to occur during the sampling process

[0007] 3. Ordinary sediment samplers cannot adjust the capacity of sediment collection, and the adaptability is not wide enough

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