
长距离输水泵站中空气罐进出口阻力系数对其水锤防护效果影响的研究
张白云, 王俊新, 唐泽润, 廖志芳, 蒋劲
长距离输水泵站中空气罐进出口阻力系数对其水锤防护效果影响的研究
Research on the Influence of Resistance Coefficient of Air Tank Inlet and Outlet on Water Hammer Protection Effect in Long-distance Water Pump Station
在长距离输水的泵站系统中,空气罐正在得到越来越广泛的应用,以往的输水项目中一般在泵房内设置空气罐以调节事故停泵产生的升压和负压,其效果比调压塔、空气阀等要显著一些。随着我国的调水项目越来越多,设置空气罐这种水锤防护方法的研究也在逐步深入展开。空气罐的特征参数对其水锤防护效果的影响很大,如水气比、预充压、进出口阻力系数等,基于某实际输水工程,采用PIPENET水力分析软件对设置空气罐这种水锤防护方案进行了分析计算,研究空气罐的进出口阻力系数对其水锤防护效果的影响。改变进出口阻力系数进行计算,通过比对多组计算结果,得到了其进出口阻力系数对防护效果影响的规律,空气罐进口阻力越大,对正压的控制越有利,出口阻力越小,对负压的控制越有利。研究表明,在工程实际中可以通过改变空气罐进出口阻力系数来降低成本、提升防护效果。
In the pumping station system for long-distance water transportation, air tanks are being used more and more widely. In the past water transportation projects, air tanks were generally installed in the pump room to adjust the boost and negative pressure generated by accidental pumping. The effect is more significant than that of surge tanks and air valves. With the increasing number of water transfer projects in our country, the research on the water hammer protection method of setting up air tanks is gradually being carried out. The characteristic parameters of the air tank have a deep influence on its water hammer protection effects, such as water-to-air ratio, pre-charge pressure, import and export resistance coefficients, etc. Based on an actual water delivery project, PIPENET hydraulic analysis software is used to set the water hammer of the air tank The protection scheme is analyzed and calculated, and the influence of the resistance coefficient of the inlet and outlet of the air tank on its water hammer protection effect is studied. By comparing multiple sets of calculation results, the law of the influence of the import and export resistance coefficient on the protection effect is obtained. The greater the air tank inlet resistance, the more beneficial the control of positive pressure, and the smaller the outlet resistance, the more advantageous the control of negative pressure. Research show that in engineering practice, the cost and protection effect can be improved by changing the resistance coefficients of the air tank inlet and outlet.
长距离输水泵站 / 空气罐 / 进出口阻力系数 / 水锤防护 {{custom_keyword}} /
long-distance water pump station / air tank / resistance coefficient of inlet and outlet / water hammer protection {{custom_keyword}} /
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