Design And Simulation Of Isolation Valve For Liquid Gas Storage Device

Liquid Gas Storage Device refers to the connection of accumulator and hydraulic cylinder through pipeline as power source to drive load movement.In the equipment under high pressure and large flow condition,isolation valve is installed between hydraulic cylinder and accumulator.Its purpose is to ensure the safety of personnel and equipment and control the opening and closing of main oil circuit.In the offshore floating drilling crane heave compensation system,the liquid-gas energy storage device is the main power source.The operating conditions of the crane heave compensation system are analyzed and studied in this paper.The subject first analyzes the working principle of the isolation valve of the liquid gas storage device,and designs the schematic diagram of the hydraulic system of the isolation valve.Calculate the parameters of the isolation valve system,establish the dynamic model of the crane heave compensation system,build the simulation model block diagram,and get the variation law and amplitude of the system pressure and flow changes.The three-dimensional structure of the isolation valve is designed.The main valve and the pilot valve respectively carry out the structural design of the valve body and the calculation of the spring parameters,and obtain the working principle diagram and three-dimensional structure diagram of the valve body,and the control components such as the electromagnetic ball valve,the throttle valve and the overflow valve.Flow valve and other auxiliary component selection;structural design and finite element analysis of the valve body of the isolation valve system,including layout design,oil circuit design,valve body verification,determine the valve body size,integrate hydraulic components into On the isolation valve body,the integration and standardization of the isolation valve are realized.The isolation valve system simulation model was established and the structural parameters were optimized.The simulation model of the main valve,the pilot valve and the isolation valve system was established by modeling and simulation software AMESim.The mathematical model of the main valve and the pilot valve was built,and the liquid resistance diameter and spring were studied.The influence of pre-compression amount on system performance is verified,and the rationality and accuracy of the structural parameters of the simulation model are verified.The structural parameters of the isolation valve are optimized by NLPQL optimization algorithm.Study the dynamic reliability of the isolation valve system.The dynamic reliability of the isolation valve system is analyzed by stochastic Petri net.The SPN model of the system is built,and the Markov model isomorphic to the SPN model is established to simulate and solve the isolation valve system from the overall angle.Performance,get the reliability,availability,mean time between failure and other indicators of the isolation valve.The influence of state transfer rate on system transient availability is analyzed,and the optimization measures of equipment dynamic reliability are proposed.The innovation of the subject is to design an isolation valve system suitable for high pressure and large flow conditions,including hydraulic schematic diagram and three-dimensional structure diagram,to achieve integration and standardization of hydraulic system.The dynamic characteristics of the isolation valve system are analyzed by simulation,the influencing factors of the dynamic characteristics of the system are determined,and the structural parameters are optimized.Study the dynamic reliability of the system,obtain the transient reliability and availability indicators of the system,and comprehensively judge the performance of the system.