Rotary sealing bottom type superficial layer in-situ sediment sampler

Abstract

The invention relates to a sediment sampler for sampling bottom sediments under the water, in particular to a rotary sealing bottom type superficial layer in-situ sediment sampler. The sediment sampler comprises a sample bailer and is characterized by further comprising a casing pipe, a half cone-shaped underseal, a separation piece, a rotating shaft and a soft spring, wherein the casing pipe is connected with the top of the sample bailer and located on the outer side of the sample bailer, the bottom of the sample bailer is coated by the half cone-shaped underseal, the separation piece is arranged in the sample bailer, the bottom of the rotating shaft is connected with the half cone-shaped underseal, the soft spring is connected with the top of the rotating shaft, the rotating shaft is located in the sample bailer and the casing pipe, and the end portion of the soft spring extends to the outside of the casing pipe to be provided with a rotating handle. The soft spring can be rotated to drive the rotating shaft and the half cone-shaped underseal to rotate, during sampling, firstly the sample bailer is pressed into sediments, then the handle of the soft spring is rotated to enable the half cone-shaped underseal to rotate for 180 degrees to seal a sediment sample, and the sample bailer is lifted to obtain a complete semi-cylindrical sediment sample. The rotary sealing bottom type superficial layer in-situ sediment sampler has the advantages of being simple in operation, high in adaptability and sampling efficiency, small in sediment sample disturbance, convenient to take along and the like, and is particularly suitable for the in-situ accurate sampling of sediment samples of shallow water surface layers.

Description

technical field [0001] The present invention relates to a mud picker for underwater sediment collection, in particular to a rotary bottom-sealed shallow in-situ collection device for in-situ collection of surface sediment (5-20cm) in shallow waters (water depth 1-5m). mud picker. Background technique [0002] In natural waters, pollutants are constantly interacting between water bodies and sediments, especially in shallow sediments. Therefore, in the research of water environment monitoring, treatment and protection, the interaction between water body and shallow sediment is an important research content, and it is necessary to collect a large amount of shallow sediment for in-situ layered analysis. At present, the collection of shallow mud samples mostly adopts negative pressure tube collectors, which have the advantages of simple structure and convenient operation. However, because the shallow sediment has the characteristics of high moisture content and thin mud layer, ...

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Problems solved by technology

[0003] In order to overcome the shortcomings of the existing mud sampler, such as serious disturbance of shallow mud samples and easy mud leakage, the present invention designs a rotatable and closed bottom, which can lift the mud samples collected in the collector out of the water surface without disturbance or slight disturbance, and improve The rotary-bottom-sealed shallow in-situ mud sampler with high precision for in-situ layering of shallow bottom mud can minimize the damage to the layered structure of the mud sample during the collection process, and can well solve the micro-disturbance in-situ analysis of the surface mud. layer sampling requirements

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