A lake core sampling device for lake sediments with different water depths

Abstract

The invention discloses a lacustrine core sampling device for sediments in lakes with different depths. The lacustrine core sampling device comprises a handle rod, a drilling rod and a rotary core capturing device which are sequentially fixedly connected from top to bottom, wherein the rotary core capturing device comprises a sample pipe and a rotary blade, a sample pipe body is a semicircular groove body, a connecting rod connected with the drilling rod is arranged at the top end of the semicircular groove body, a drill bit is fixedly arranged on the outer side surface of the bottom end of the semicircular groove body, and two ends of the rotary blade are respectively rotatably connected to the top end and the bottom end of the semicircular groove body. According to the lacustrine core sampling device, the defect of an existing mechanical sediment sampler is overcome, the sampling success rate and the sample integrity are increased, lacustrine cores of water bodies and marshes in different depths are sampled through the arrangement of prolongable drilling rod and a hammer, the dismantling link is greatly simplified, the time is effectively saved, and the demand on research is also met.

Description

technical field [0001] The invention relates to a bottom sediment sampler, in particular to a lake core sampling device for lake sediments with different water depths. Background technique [0002] The main purpose of environmental change science is to reconstruct the past climate, environment and ecological history of the earth through the study of natural records such as glaciers, deep-sea sediments, loess, permafrost, lake sediments, tree rings, and corals, so as to understand the evolution of the earth system. The past situation, the understanding of the changing laws of the earth's environment (including the changing process, changing range and changing rate) and its controlling factors provide the necessary background conditions and analogy models for predicting possible future global changes. [0003] The basic requirements for scientific drilling sampling (core) are: no disturbance, no deformation, no pollution; continuous and complete sampling, with a core sampling ...

AI Technical Summary

Problems solved by technology

However, there are still some areas to be improved, mainly in: (1) There are some disturbances during sampling, and sometimes even destroy the sediment sequence; (2) The sampling method is single, and the comprehensive adaptability to different sampling environments is poor. In particular, it cannot meet the sampling work under different environmental conditions; (3) The length of sediment coring is short, and most of the collection of deep-water sediment lake cores can only reach a thickness of 40-50cm; (4) The success rate of sampling is not high And the cost is expensive, it is not conducive to disassembly and assembly, and it is difficult to repair after damage; (5) The sampling range is limited, and it cannot be applied to continuous sampling of deep-water lakes; (6) It cannot be applied to lake sediments of various textures, and for hard sediments For soft sediments, there will be a problem that it cannot be drilled, and for soft sediments, there will be a phenomenon of sample leakage

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