A Pipe Heat Insulation Device Featuring Vacuum Valve Box Structure

In order to solve the problem of heat insulation lifetime of low-temperature and vacuum pipes used by cryogenic liquefied natural gas (LNG) filing station, based on the theories of cryovacuum thermal insulation materials at home and abroad, through focusing on exploring such aspects as heat conduction of gas, heat insulating layer design and vacuum degree, Qingdao Luke Auto Gas Development Co., Ltd has developed one new type of pipe heat insulation device. The device is featured by the functions of unloading, pressure regulating and liquid adding, with prolonged life-cycle for vacuum insulation and better operability.