Fidelity secondary sampling equipment for bottom sediments

Abstract

The invention relates to fidelity secondary sampling equipment for bottom sediments. The fidelity secondary sampling equipment comprises an upper barrel assembly and a lower barrel assembly, a piston assembly, a turning cover assembly, a middle supporting plate, an upper guide rail barrel, a lower guide rail barrel and a sampling barrel, wherein the middle supporting plate is mounted between the upper barrel assembly and the lower barrel assembly; the upper guide rail barrel is mounted between the middle supporting plate and an upper end sealing disc; the turning cover assembly and the piston assembly are mounted in the lower barrel assembly; and the sampling barrel is mounted at the lower end of the piston assembly. According to the fidelity secondary sampling equipment disclose4d by the invention, a designed mandrel and a designed elastic clamping plate structure can stop the sampling barrel from moving upwards in the sampling process; an overlying water check valve can guarantee that overlying water can be smoothly discharged out in the sampling process, and the low-disturbance sampling is realized; a designed secondary sampling check valve can be used for the secondary sampling so that the sampling rate is improved and the sampling cost is saved; and a sealing piece between two adjacent parts and a sampling back turning cover are automatically closed to guarantee the sealing of a system. The fidelity secondary sampling equipment disclosed by the invention is compact in structure, high in sampling rate and good in high-fidelity effect, the sampling time is saved and the cost is low; and the fidelity secondary sampling equipment is applicable to fidelity sampling of the bottom sediments, natural gas hydrates and mud samples in rivers and lakes.

Description

technical field [0001] The invention relates to a seabed sediment sampling device, in particular to a seabed sediment fidelity secondary sampling device. Background technique [0002] Seabed sediment sampling equipment is a kind of exploration equipment used to collect seabed surface sediments. The collected sediment samples can be used for geological science and biological science research. [0003] Seabed sediment sampling equipment is mainly used for: [0004] ①Exploration of seabed mineral resources, including searching for oil and seabed new energy - natural gas hydrate, etc.; [0005] ② Acquisition of biological samples; [0006] ③ Marine engineering geological survey, including coastal engineering survey, waterway survey, submarine tunnel geological survey, submarine cable, optical cable, gas pipeline, oil pipeline line survey, etc.; [0007] ④Global climate and environmental research, seabed sampling is also an important means to study climate and environmental ...

AI Technical Summary

Problems solved by technology

[0010] Existing sediment sampling equipment generally has disadvantages such as low sampling rate, no fidelity or poor fidelity effect

The sampling rate of the sampling equipment is low, often resulting in too few samples or no samples at all, resulting in excessive sampling costs

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