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Study On Water Hammer Protection Using Box Type Two-way Surge Tank In Long Distance Water Pipeline With High-lift And Multi-fluctuation

Posted on:2009-02-20Degree:MasterType:Thesis
Country:ChinaCandidate:Y Y XuFull Text:PDF
GTID:2132360272983471Subject:Municipal engineering
Abstract/Summary:PDF Full Text Request
Water hammer of cavities collapsing with water column separation easily occurs in long distance pressure water transmission pipeline system, and leading to serious harm caused by water hammer. Especially water transmission pipeline with high-lift and multi-fluctuation, water hammer accident is most and the prevention water hammer is most difficult. Therefore, the water hammer protection research of long distance water transmission pipeline with high-lift and multi-fluctuation is one of important problem in safe operation of pipelines, it is necessary to have a further discuss on this problem. The actual project needs this aspect of the technology eager, therefore, protective measures of water hammer using box type two-way surge tank protective, etc, is researched mainly by performance experimental study of box type two-way surge tank in the article.In the paper, theory of numerical calculation of water hammer is shown, boundary conditions of water pump under different work conditions and common water hammer protective measures are given. The performance of box type two-way surge tank is studied by experiment, the purpose and significance of the experiment are described, and the structure and working principle of box type two-way surge tank are depicted. Processing and anglicizing of the experiment data, finally, conclusion was given.This paper outlines several of patterns of gas-liquid two-phase flow and pattern transformation on the basis of something studied from the forefathers in water pipeline and presser and harm of the water supply pipe clogged by gas. The best way of exhaust was studied. The emphasis of water hammer protection is water hammer of cavities collapsing in long distance water transmission pipeline with high-lift and multi-fluctuation is proposed. Structure principle, performance characteristic and technique essentials of common protective measures for water hammer is introduced, and points out some items requiring attention when choose protecting measures for water hammer. According to characteristic method in the hydraulic transients, building up the water hammer calculation mathematics model combined with all kinds of boundary conditions, wrote the visual program of water hammer calculation with the computer language, made use of the computer to carry on simulation calculation.Finally, take Yanzhou coal industry group, Dalian chemical industry and Yulin coal chemistry of water hammer of the pipelines as the example, simulation calculation of water hammer protection. Based on the result of calculation, various protective measures of water hammer of cavities collapsing is compared with. Different water hammer protective measures have different effects is verified. The best protective measures of water hammer of cavities collapsing as follows:â‘ Slow closure check valves are installed outlet of water pump;â‘¡Box type two-way surge tank is installed water catchments main pipe outlet of water pump;â‘¢Exhaust valves of the steady speed and cushioning are set on the pipe, prevention water hammer of cavities collapsing with free gas. It is a valuable reference to protect water hammer for similar engineering.
Keywords/Search Tags:water transmission pipeline with high-lift and multi-fluctuation, water hammer of cavities collapsing, water hammer protection, box type two-way surge tank
PDF Full Text Request
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