农业工程学报2012，Vol.28Issue(18)：88-97,10.DOI:10.3969/j.issn.1002-6819.2012.18.014
PVC 管网中支管连接方式对干管水锤压力叠加的影响
Effects of connecting patterns of branch pipes on superposed water hammer pressure in trunk pipe for the PVC pipeline system
摘要
Abstract
To reasonably design irrigational pipe system and develop the theories of pipe system plan for the pipeline network irrigation district, the effects of inlets of branch pipes with differential spacing interval and diversion angel on the superimposed water hammer in main pipe were studied by experiments and simulations based on the PVC-U dendritic pipe network system. Diameter of PVC-U dendritic pipe was designed as 200mm, the inlets spacing interval of branch pipes as 0, 6.2, 12.4, and 18.6m respectively, and diversion angel as 90°,60°, and 45°respectively. A centrifugal pump with designed head of 28m and designed capacity of 374m3/h was employed to supply pressure fluid to the pipeline system. The results indicated that the corresponding superimposed pressure value in the main pipe increased from 23.5 m to 30.1 m with inlets spacing interval reducing from 18.6 m to 0 m, and the superimposed pressure of water hammer in main pipe increased from 30.1m to 34.9 m with the diversion angel decreasing from 90° to 45°. The superimposed water hammer in main pipe was exponentially lower with increasing spacing interval and the diversion angel of tributary pipes inlets. In dendritic pipe network system, a spacing interval of diversion inlets should be designed in the range of 0 to a half of field width or more, and diversion angel as 90 degree. These results are helpful to the design and operation of the dendritic pipe network system for water delivering and distributing.关键词
管道系统/水锤/设计/输配水管网Key words
piping system/ water hammer/ design/ network for water delivery and distribution分类
建筑与水利引用本文复制引用
魏闯,李明思,李东伟,雷成霞..PVC 管网中支管连接方式对干管水锤压力叠加的影响[J].农业工程学报,2012,28(18):88-97,10.基金项目
国家节水灌溉工程技术研究中心(新疆)联合基金项目(Z200901) （新疆）
