Extraterrestrial celestial body sample gunpowder heating and sealing structure

Abstract

The invention discloses an extraterrestrial celestial body sample gunpowder heating and sealing structure which comprises a sealing cover body, a sealing container cylinder body, an indium-silver alloy sealing strip, gunpowder and an electric igniter, wherein a knife edge is arranged on the inner side of the sealing cover body, a sealing groove is machined in the matching face of the sealing container barrel and the sealing cover body, a gunpowder groove is machined below the sealing groove and is not communicated with the sealing groove, the indium-silver alloy sealing strip is placed in thesealing groove, gunpowder is placed in the gunpowder groove, and the ignition end of the electric igniter is placed in the gunpowder groove. When the sealing cover body is closed, the knife edge extends into the sealing groove, the gunpowder is ignited through the electric igniter, heat released by combustion of the gunpowder heats the indium-silver alloy sealing strip and melts the indium-silveralloy sealing strip, the knife edge is wrapped by an indium-silver alloy solution, and sealing is formed after the indium-silver alloy solution is cooled. The structure can perform vacuum sealing on the extraterrestrial celestial body sampling container.

Description

technical field [0001] The invention belongs to the field of space vacuum sealing, and in particular relates to a gunpowder heating and sealing structure for extraterrestrial celestial body samples. Background technique [0002] So far, the extraterrestrial celestial body sampling and sealing missions successfully implemented abroad include: the unmanned automatic sampling mission of lunar samples implemented by the former Soviet Union (Luna project), the unmanned "Sichuan" asteroid automatic sampling mission implemented by Japan (Hayabusa project). ), the unmanned automatic sampling mission of comets implemented by the United States (Stardust Project), and the mission of collecting and packaging lunar samples by humans in the United States (Apollo Project). Among them, the Luna project and the Hayabusa project both use the sealing method of the rubber ring, and the Stardust project uses the sealing method of the Kevlar rope seal. After returning, it was found that the samp...

AI Technical Summary

Problems solved by technology

However, when completing the long-distance sampling task of extraterrestrial objects, the rubber ring needs to experience the test of extremely low temperature environment and long-term flight, and it is easy to age, causing the sample airtight container to leak

Beijing Institute of Technology proposed a plan to explode welded sealed containers, but the high-energy mechanical shock and high-speed impact generated by the explosion may damage the detector or surrounding structures and components, and may even damage the welded joint itself

Zhejiang University proposed a brazing sealing scheme, but the brazing sealing structure is complex, the detector carries heavy weight, and the power consumption is large, so it is not suitable for long-term and long-distance detection tasks

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