A built-in sampling mechanism for soft lunar soil samples

Abstract

The invention discloses a built-in soft lunar soil sample sampling mechanism. A core tube top joint, a core lifting stay rope, a core taking tube, a fixed ring, a drill rod sub, a spacing ring, a soft core-taking bag, a drill rod, a core taking belt, a guide ring, a core tube base joint, a pull head assembly, a sealer and a drill. The drill rod sub, the drill rod and the drill are fixedly connected to form a hollow drilling tool. The core tube top joint, the core taking tube and the core tube base joint form a hard core taking tube. The core tube base joint has an inner annular cavity structure. The soft core-taking bag is connected on the sealer, which is preplaced in the annular cavity of the core tube base joint. The spacing ring is installed on the soft core taking bag. The core taking belt passes through the guide ring to be fixedly connected on the pull head assembly. The sampling mechanism of the invention is simple and operates reliably, and can keep sequence information of deep lunar soil samples. The soft core taking bag for wrapping lunar soil samples can be used to realize in situ packaging, winding and recovering of deep lunar soil samples 2 m deep below the lunar surface, and recovery space is saved.

Description

technical field [0001] The invention relates to a built-in soft lunar soil sample sampling mechanism, which belongs to the technical field of drilling core sampling. Background technique [0002] The return of lunar sampling is the main task of the third phase of my country's lunar exploration. The mission of drilling, sampling and returning deep lunar soil faces many difficulties and technical breakthroughs. The collection, sealing and recovery of lunar soil samples 2m below the lunar surface are crucial key technologies. [0003] At the stage of the drilling sampling device program, the coring mechanism adopts a single-layer soft eversion sampling mechanism. In the drill pipe, the single-layer soft coring bag is turned eversion on the outer wall of the hard coring tube. The end of the coring bag is connected to a highly elastic and outwardly twisted silk sealer. This sampling mechanism can realize in-situ coring and sealing when drilling into homogeneous and small-grained...

AI Technical Summary

Problems solved by technology

However, when drilling into the lunar soil with large particles or faulty conditions, under the interference of vibration, impact and large particles, the single-layer soft core bag is prone to twist, resulting in insufficient core volume, or even failure, and high elasticity. The twist-type sealer moves relative to the hard core tube during the whole drilling and sampling process. When the drill is stopped and the core is lifted, it turns over and then seals. Therefore, the sealer and sampling mechanism need to be improved.

Images