| PVC管网中支管连接方式对干管水锤压力叠加的影响 |
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| 引用本文： | 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. |
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| 作者姓名： | 魏 闯 李明思 李东伟 雷成霞 |
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| 作者单位： | 1. 石河子大学水利建筑工程学院,石河子832000;山西水利职业技术学院,运城044004
2. 石河子大学水利建筑工程学院,石河子,832000 |
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| 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） |
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| 摘 要： | 在灌区管网化建设中,为给管网布置设计提供科学依据以及完善管网设计理论,该文针对PVC-U输配水树状管网,试验研究支管分水口不同对置间距和不同分水角度对干管叠加水锤压力的影响,同时,对相应的管道叠加水锤过程进行模拟。试验中的PVC-U管径为200mm;支管分水口对置间距设为0、6.2、12.4和18.6m;分水角设为90°、60°和45°;用以加压的离心泵额定扬程为28m,额定流量374m3/h。试验和模拟结果表明,随着分水口对置间距由18.6m减至0,干管中相应的水锤叠加压力值由23.5增至30.1m;而随着支管分水口的分水角度由90°减至45°,干管中的水锤叠加压力由30.1增至34.9m;随着支管分水口对置间距和分水角的增大,干管中水锤叠加压力呈指数函数降低。管网设计时,支管分水口对置间距应该在0至农田宽度的一半范围内尽量大些,支管分水角应尽量呈90°布置。研究结果为输配水管网的设计和管理提供了参考。
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| 关 键 词： | 管道系统 水锤 设计 输配水管网 |
| 收稿时间： | 2011/7/15 0:00:00 |
| 修稿时间： | 2012/8/25 0:00:00 |
Effects of connecting patterns of branch pipes on superposed water hammer pressure in trunk pipe for the PVC pipeline system |
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| Wei Chuang,Li Mingsi,Li Dongwei and Lei Chengxi.Effects of connecting patterns of branch pipes on superposed water hammer pressure in trunk pipe for the PVC pipeline system[J].Transactions of the Chinese Society of Agricultural Engineering,2012,28(18):88-97. |
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| Authors: | Wei Chuang Li Mingsi Li Dongwei and Lei Chengxi |
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| Institution: | 1,2(1.College of Water Conservancy and Architectural Engineering,Shihezi University,Shihezi 832000,China;2.Shanxi Conservancy Technical College,Yuncheng 044004,China) |
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| 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. |
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| Keywords: | piping system water hammer design network for water delivery and distribution |
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