论文部分内容阅读
在液控缓闭蝶阀尚无完整统一试验标准可循情况下，依靠科研院校的技术和设备，对大口径蝶阀流阻特性进行现场测试，依据结果并结合水泵机组失电过渡机理分析，证明所设计和生产的液控缓闭蝶阀按预调角度和速度实现快慢两阶段关闭，能有效地控制水锤升压，防止水泵事故倒转，能满足大流量、高扬程、长管道、阶梯式灌溉工程所需。
In the absence of a complete unified test standard for liquid-controlled retarder butterfly valves, the on-site testing of the flow resistance characteristics of large-diameter butterfly valves relies on the technology and equipment of scientific research institutes. Based on the results and analysis of the transition mechanism of the pump unit power loss, The designed and manufactured butterfly valve with liquid-controlled slow closing closes the fast and slowly two stages according to the preset angle and speed, which can effectively control the water hammer and boost the pressure to prevent the water pump from reversing. It can meet the needs of large flow, high lift, long pipe and stepped irrigation Engineering needs.