为防止发生水锤事故,长距离管道有压自流输水系统末端设置的控制阀门关阀时间一定要充分,关阀时间由仿真数值计算确定。给出的末端阀作为边界条件的数学模型适用于蝶阀、活塞阀等诸多阀型。长距离管道自流输水系统的末端阀推荐采用活塞阀,末端阀为活塞阀的自流输水系统推荐的关阀方式是线性关阀。 In order to prevent water hammer accident, long-distance pipeline pressure gravity flow system set at the end of the control valve off valve time must be sufficient, off the valve time determined by the simulation numerical calculation. The mathematical model of the end valve given as the boundary condition is suitable for many valve types such as butterfly valves and piston valves. The long-distance pipeline gravity flow system of the end valve recommended piston valve, the end valve for the piston valve gravity flow system is recommended off valve is a linear off valve.