Vacuum heat insulation type double-layer corrugated compensator

The utility model discloses a vacuum heat insulation type double-layer corrugated compensator which comprises an inner-layer corrugated pipe and an outer-layer corrugated pipe, the two ends of the inner-layer corrugated pipe and the two ends of the outer-layer corrugated pipe are connected and sealed through a first annular plate and a second annular plate respectively to form a cavity, and a vacuum valve used for vacuumizing the cavity is arranged on one side of the cavity. The product structure of the corrugated pipe compensator is improved, the vacuum heat insulation double-layer corrugated compensator is provided, heat conduction between an internal medium and the environment temperature is prevented, and therefore the defects caused by the fact that the outer side of the corrugated pipe compensator is wrapped with heat insulation materials are overcome. 本实用新型公开了一种真空绝热型双层波纹补偿器，包括内层波纹管和外层波纹管，所述内层波纹管和外层波纹管两端分别通过第一环板和第二环板连接密封形成型腔，所述型腔的一侧设有用于将型腔抽真空的真空阀。本实用新型改进波纹管补偿器的产品结构，提供一种真空绝热的双层波纹补偿器，防止内部介质与环境温度之间的热量传导，从而