长距离泵输水系统两阶段关闭蝶阀合理关阀程序研究  

Research on the Reasonable Close Program of Two-stage Closing Butterfly Valve in Long Distance Pumping Water Transfer System

作　　者：闫天柱 朱满林[2] 李小周[2] YAN Tian-zhu;ZHU Man-lin;LI Xiao-zhou(PowerChina Beijing Engineering Corporation Limited,Beijing 100000,China;State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]中国电建集团北京勘测设计研究院有限公司,北京100000 [2]西安理工大学西北旱区生态水利工程国家重点实验室培育基地,陕西西安710048

出　　处：《中国农村水利水电》2021年第2期161-165,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(51479160)。

摘　　要：两阶段关闭蝶阀是水锤防护的重要措施之一,为了研究如何合理的确定两阶段关闭蝶阀的关阀程序,应用水锤基本理论和特征线法,结合某实际工程,对长距离有压输水管道系统在八种不同运行工况下的停泵水锤过程进行了计算,分别得到1080组两阶段关闭蝶阀的关阀程序在八种工况下管线的最小水锤压力、泵出口最大压力、倒转转速和超过额定转速的时间。计算结果表明:全部水泵停泵并不是最不利工况;不同工况下,两阶段关闭蝶阀的最优关阀程序不同,两阶段关闭蝶阀关阀程序的可行域不同且差异较大。通过对计算结果的对比分析,提出两阶段关闭蝶阀关阀程序合理的确定方法,该方法对同类工程在确定关阀程序时具有参考意义。Two-stage closing butterfly valve is one of the important measures of water hammer protection.In order to determine reasonable close program of two-stage closing butterfly valve,calculations are carried out for the pump-stopping water hammer process of a long pressurized pipeline system in eight different operating conditions based on the basic theory of water hammer and the method of characteristics.Specifically,the parameters,including the minimum water hammer pressure of pipeline,maximum pressure of pump outlet,reverse speed,and time of exceeding the rated speed,which are obtained from 1080 sets of close programs of two-stage closing butterfly valve under the eight different operating conditions.The results show that all the pump stopping is not the most disadvantageous operating condition.The optimal close programs of two-stage closing butterfly are different under different operating conditions,and significant differences of the feasible region of close programs of two-stage closing butterfly valve were also observed.Through a comparative analysis,this study proposes a reasonable way to determine the close program of two-stage closing butterfly valve.The method serves as a reference for the determination of close program of valve in similar projects.

关 键 词：水力学 长距离输水工程 停泵水锤 两阶段关闭蝶阀 关阀程序 

分 类 号：TV134.1[水利工程—水力学及河流动力学]