Air valves are often installed on the side wall of the water supply pipe manhole,and some of the gas will remain in the upper part of the manhole after intake,creating the water hammer protection effect of the air cushion pressure tank.Based on this,a design method for a water hammer pneumatic pressure tank device is pro-posed,which utilizes the negative pressure phenomenon of water hammer generated by the power outage of the pump station accident to supplement the pressure tank with air through a vacuum breaking valve or air valve,so as to prevent liquid vaporization in the water pipeline and reduce the maximum pressure of water hammer.Then,a numerical simulation mathematical model was established for the hydraulic transients of the water hammer pneu-matic pressure tanks.Finally,taking an actual water diversion project as an example,the water hammer protec-tion effects of setting air valves,air valve regulating chambers,and vacuum breaking valve pneumatic pressure tanks respectively were calculated and compared.The results show that the vacuum breaking valve pneumatic pressure tanks has the best water hammer protection effects.
关键词
水击/空气阀/真空破坏阀/压力罐/补气/仿真
Key words
water hammer/air valve/vacuum breaking valve/pressure tank/air replenishment/simulation
维普
万方数据