Spiral grid type anti-clamping sealing structure

Abstract

The invention discloses a spiral grid type anti-clamping sealing structure, belongs to the field of sampling detection, provides a sealing function interface without a sealing part and aims to a rotary moving pair working condition of incomplete sealing. A coring bit end is of a hollow structure; a sample outer protection tube shaft end is arranged inside the coring bit end; the coring bit end is in sliding matching with a gap of the sample outer protection tube shaft end; threads are formed in the outer surface of the sample outer protection tube shaft end; groove-shaped grids are formed in the inner surface of the coring bit end; or knurling is formed in the inner surface of the coring bit end. Compared with a conventional sealing mode, the structure needs no sealing part and has the advantages of good sealing properties, good environmental adaptation, non-sensitive sealing gaps and the like. By adopting the structure, not only is the drilling security greatly improved, but also a great deal of economic loss caused by engineering failure is avoided.

Description

technical field [0001] The invention belongs to the field of sampling and detection, in particular to a spiral-grid anti-jamming sealing structure. Background technique [0002] With the overload development of the earth's resources, environmental pollution, resource scarcity, energy appreciation and other problems are difficult to solve. How to obtain and use new energy has become the most serious problem encountered in human history. As early as the middle of the 20th century, the United States and the Soviet Union discovered that there are a large number of available resources on the moon, especially helium-3. This energy can be used as a pollution-free nuclear fusion fuel and the earth reserves are very small. Based on sustainable development and economic conditions, the Lunar exploration and lunar soil collection are very necessary for the development of our country. At present, China has not fully realized the fully automatic star soil drilling and sampling work, whic...

AI Technical Summary

Problems solved by technology

During the process of drilling down, there is always a certain internal pressure in the granular body of the lunar soil, which causes a part of the soil flow to occupy the gap between the sampling outer protective tube and the drill bit, and the sampling outer protective tube moves up and down, and the soil clods will After periodic extrusion, soil particles will enter the gap during this process, causing the rotation to get stuck and stuck.

If the drilling and sampling mechanism breaks down, it will directly affect the success or failure of the entire task and cause a lot of economic losses

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