Research on Optimization Method of Equipment Maintenance Strategy in Gas Transmission Network
Aiming at the problem of insufficient or excessive maintenance in the maintenance mode of gas pipeline network equip-ment this paper proposes a preventive maintenance optimization model based on reliability centered maintenance.Taking the ball valve of gas pipeline network as an example,the paper analyzes the FMECA of the ball valve,and finds that the main failure mode is internal leakage and the main components causing the internal leakage fault are valve seat and sealing surface.On this basis,the paper uses K-S test and FMECA analysis the correlation coefficient is used to fit the distribution of the two components,and it is confirmed that the fault free operation time of the two components obey Weibull distribution.Then,under the premise of given reliability of 0.9,considering the life information of valve seat and sealing surface,combined with fuzzy comprehensive evaluation method,the preventive maintenance cycle of ball valve internal leakage can be extended from 365 days to 456 days.The results show that this method can effectively reduce the number of equipment maintenance,extend the maintenance cycle and reduce the total maintenance cost.
NETL
NSTL
万方数据
维普
