多处水柱分离与断流弥合水锤综合防护问题及设计实例(上)

Problems and Design Example of Comprehensive Protection for Water Hammer due to Cavities Collapsing with Water Column Separation at Multi-Points

远距离输水工程中易发生多处水柱分离并造成断流弥合水锤危害。在这种泵站管路设计中 ,应作全面的水锤电算分析并提出综合防护措施。总结多年来的研究成果 ,论述了多处水柱分离与断流弥合水锤综合防护设计中的几个基本问题 ,着重阐述了多点固定完全断流型空腔数 理模型的建立与运用 ,单向注水与注空气 (缓冲 )问题 ,多处单向注水电算源程序的编制 。

The phenomenon of water column separation at multi points may occur easily and result in the damage of water hammer due to cavities collapsing in water transmission line over long distance. The overall water hammer computer analysis should be made, and comprehensive protection measures should be then taken in this kind of pumping station and pipeline project. The consideration of comprehensive protection for water hammer due to cavities collapsing with water column separation at multi points is presented on the basis of many years' research and experience, especially the establishment and application of mathematics physics model for multi point fixed complete cavities are explained, and the method of one way water introduction is compared with that of one way air introduction for damp. The computer programming for one way water introdution at multi points is discussed. The design example of water hammer analysis and comprehensive protection in water transmission project over long distance of Z city is also presented in details.