Multipoint Synchronous Clay Core Sampler

Abstract

The present invention is widely applicable to research fields such as agricultural science, geotechnical engineering, and radiochemistry, and is a multi-point synchronous clay column core sampler, which consists of an upper table, a hand wheel, a base plate, a sampling tube, a lead screw, a circular guide rail, and a telescopic support. It is composed of nine parts, namely, fixed ring and sample fixture; the main frame of the sampler is composed of the upper table, handwheel, screw, circular guide rail, and telescopic bracket. The bracket is flexible; the connection holes of the sampling tubes are evenly distributed on the base plate, and the sampling tubes are fixed by screw connection; multiple sampling tubes are fixed on the base plate, and there are vent holes at the upper end of the sampling tubes, and the sampling tubes are made of stainless steel outer layer + polymer The double-layer structure of the tetrafluoroethylene lining, the polytetrafluoroethylene lining is a replaceable layer, and the sampling ring knife is connected to the front end of the sampling tube through threads. The invention has high positioning accuracy, simple structure, easy operation, easy disassembly and washing, and low risk of cross-contamination.

Description

technical field [0001] The invention relates to a clay column core sampling device, which is widely used in the research fields of agricultural science, geotechnical engineering, radiochemistry and the like. Background technique [0002] Clay materials are key research objects in the fields of agriculture, geotechnical engineering, and nuclide migration. In experimental research, it is usually necessary to obtain the site concentration distribution of pollutants in the three-dimensional space of clay materials. Clay core sampling is the basis for sample processing. It determines the validity of the sample and the reliability of the data. Due to the high plasticity, high viscosity, and high expansion of clay materials, accurate sampling cannot be achieved by traditional methods, especially in large-scale (meter-level and above) laboratory simulations and on-site nuclide migration studies for backfill materials such as bentonite. At the same time, samples in high-compaction a...

AI Technical Summary

Problems solved by technology

For clay-like media, this sampling method cannot achieve simultaneous multi-point sampling, and the operation process is complicated, the workload is heavy, and it is easy to be contaminated

The disturbance of the whole soil column by single sampling and the multiple sampling process greatly increased the risk of cross-contamination between column cores, and failed to realize the simultaneous multi-point and low-contamination sampling requirements for clay samples with different moisture contents and different scales

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