A flexible sealant bolt integrated self-sensing pressure leak stop patch for space on-orbit

CN117469516BActive Publication Date: 2026-06-26BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
Filing Date
2023-10-31
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing spacecraft leak sealing technologies are ill-suited to cracks of different sizes. When faced with large leaks, complete sealing is difficult. Traditional colloidal materials have poor adaptability to the space environment, cannot withstand pressure, and cannot self-cur or assess their adhesion. After prolonged use, it is impossible to independently detect whether the adhesion is intact.

Method used

Design a space-based flexible sealing nail integrated self-sensing pressure-sealing patch, which adopts a stepped flexible nail integrated support layer, a flexible adhesive sealing layer, a metal protective backing, an annular thin-film piezoresistive pressure sensor and a DC ultra-fine heating wire. The annular thin-film piezoresistive pressure sensor senses pressure changes and controls the DC ultra-fine heating wire to cure the adhesive, realizing autonomous bonding judgment and accelerated curing.

Benefits of technology

It achieves complete sealing of leaks of various shapes and sizes, improves the adaptability and safety of materials in space environments, ensures strong adhesion and prevents detachment, has autonomous sensing function, and adapts to rapid curing and long-term use in space environments.

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Abstract

The application provides a space on-orbit flexible sealant nail integrated self-sensing pressure sealing patch, which adopts a form of a sealant patch, and designs a stepped sealant nail integrated layered structure, which comprises a stepped flexible sealant nail integrated support layer, a flexible sealant body sealing and bonding layer, a metal protective backing, an aluminized film packaging bag, a silicon-based release paper, a ring-shaped film piezoresistive pressure sensor, a direct current ultra-fine heating wire, a micro 6-pin rectangular electric connector female head, a temperature measuring sensor PT100 and a portable sensing and processing module. By using the scheme, the problems that the existing leak sealing and repairing technologies cannot accurately and completely seal unknown shape leak holes, have poor space environment adaptability, cannot bear pressure and have poor anti-splitting performance and the like can be solved, and a better leak sealing effect is achieved.
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