Sealing assembly with comb-tooth-shaped limiting device for core-taking soft bag

Abstract

The invention provides a sealing assembly with a comb-tooth-shaped limiting device for a core-taking soft bag. The sealing assembly comprises a core-taking mechanism, a buckling mechanism and the comb-tooth-shaped limiting device. The core-taking mechanism comprises a lifting rope, the soft bag, a core-taking pipe and an outer protective pipe. The inner wall of the part, matched with the tail endof the core-taking pipe, of the comb-tooth-shaped limiting device is provided with a core-taking pipe centering ring face, and a plurality of protrusions are evenly distributed at the upper end of thecore-taking pipe centering ring face in the circumferential direction. A gap is formed between every two adjacent protrusions, and a strip-shaped line containing groove is connected with the lower portion of each gap. Annular ball containing grooves are formed in the positions, corresponding to the radial outer sides of the protrusions, of the inner wall of the comb-tooth-shaped limiting device,the protrusions correspond to the annular ball containing grooves in position, and the buckling mechanism comprises seal openings, fisherman knots and limiting balls. The sealing effect of while-drilling sealing and multi-time sealing in the drilling process is achieved, the sampling sealing reliability is improved, and by decreasing the random eccentric magnitude of the core-taking pipe, reducingcore lifting force in the drilling process and the sealing process and reducing fluctuation of the core lifting force, smooth implementation of lunar exploration sampling engineering is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of lunar surface drilling, sampling and packaging, and in particular relates to a sealing assembly with a comb-tooth-type stopper for a core-taking soft bag. Background technique [0002] China's lunar exploration project is divided into three steps of "circling, landing, and returning". The missions of orbiting the moon and landing on the moon have been successfully completed. Sampling the moon and returning to the earth has become an important task of my country's lunar exploration project. Due to the complicated working conditions of the lunar surface sampling operation, Both the lunar surface environment and the operating soil are characterized by uncertainty, and it is particularly difficult to realize the task of unmanned drilling, collection and packaging of samples. The current drilling and coring mechanism is mainly composed of a drilling unit and a coring and packaging unit. Among them, the coring a...

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Problems solved by technology

[0002] China's lunar exploration project is divided into three steps of "circling, landing, and returning". The missions of orbiting the moon and landing on the moon have been successfully completed. Sampling the moon and returning to the earth has become an important task of my country's lunar exploration project. Due to the complicated working conditions of the lunar surface sampling operation, Both the lunar surface environment and the operating soil are characterized by uncertainty, and it is particularly difficult to realize the task of unmanned drilling, collecting and packaging samples

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