Patent ID: 9395263
Filing Date: 2016-07-19
CPC Classification: G01M

Claim Text:
1. A method for inspecting sealability of a vacuum chamber, wherein the vacuum chamber has a closed site in which two sealing rings are arranged in such a way that the two sealing rings form therebetween a sealed compartment, the sealed compartment having a wall in which an evacuation hole is formed, the method for inspecting sealability of a vacuum chamber comprising: connecting an evacuation valve through a pipe to the evacuation hole to form evacuation piping; mounting a pressure meter to the evacuation piping; opening the evacuation valve to proceed with evacuation of the sealed compartment and, during the evacuation process, monitoring the pressure meter; and determining sealability of the two sealing rings according to a reading of the pressure meter; wherein a process for determining sealability of the two sealing rings according to the reading of the pressure meter comprises: determining the two sealing rings are leaking if the reading of the pressure meter does not reach a first predetermined level, where the first predetermined level is a pressure level of the sealed compartment in a vacuum condition; otherwise determining the two sealing rings are in a sealed condition without leakage if the reading of the pressure meter reaches the first predetermined level; and wherein when it is determined the two sealing rings are leaking, the method for inspecting sealability of the vacuum chamber further comprises: mounting a helium leakage detection device to the evacuation piping, where the helium leakage detection device determines if helium exists in the sealed compartment during the evacuation process; spraying helium gas to the closed site of the vacuum chamber with a gas nozzle arranged outside the vacuum chamber; identifying an outer sealing ring of the sealing rings is leaking if the helium leakage detection device detects helium; and identifying the outer sealing ring of the two sealing rings is not leaking and an inner sealing ring of the two sealing rings is leaking if the helium leakage detection device detects no helium.