Vacuum ultrathin composite aerogel felt direct-buried thermal insulation pipe and preparation method thereof

• Main Authors: WANG CHUN, ZHAO RUNQING, ZHAO JIAN, HAN RUIRUI
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2022
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

The invention discloses a vacuum ultra-thin composite aerogel felt direct-buried thermal insulation pipe and a preparation method thereof, and belongs to the technical field of direct-buried thermal insulation pipes. Comprising a plurality of working pipes which are installed in a segmented mode and sleeved with vacuum outer protection pipes, a plurality of partition plates are arranged between the working pipes and the vacuum outer protection pipes, and a plurality of vent holes are formed in the partition plates. Sealing plates are arranged at the two ends of the vacuum outer protection pipe and the two ends of the working pipe respectively, an air exhaust hole is formed in one sealing plate, and a vacuum layer can be formed between the vacuum outer protection pipe and the working pipe through vacuumizing of the air exhaust hole. The vacuum outer protection pipe is wrapped with aerogel felt, and the aerogel felt sequentially comprises inner-layer aluminum foil, aerogel heat preservation felt and outer-layer