长距离大管径输水管道水锤防护研究

发布时间：2018-03-23 16:32

本文选题：长距离大管径　切入点：水锤防护　出处：《长安大学》2015年硕士论文

【摘要】：水是不可替代的有限自然资源,我国的水资源时空分布不均导致的区域性缺水严重,成为阻碍城市发展的制约因素,因此,近几年国家以及大部分地方大力发展长距离引水工程建设。由于输水工程的特殊性和复杂性,长距离输水中存在着很多的问题,其中最常见、最突出的问题是长距离输水管线水锤防护。因此,应给予输水管道的安全防护问题足够的重视。首先,本文简单介绍了课题背景及水锤研究的意义,简述水锤的基本概念、成因、危害以及国内外水锤发展的状况。本文以长距离大管径输水系统的最佳运行工况和水锤防护方案为方向,详细介绍了长距离大管径管道水锤的特点,其水锤防护的重点是断流弥合水锤防护,分析了管道气囊运动升压理论及各工况下压力波动分析和最佳排气方式。其次,本文提出了长距离大管径的水锤防护重点应该是稳压排气,详细介绍了缓闭止回阀、进排气阀、超压泄压阀和箱式双向调压塔等常用防护设备的结构、作用和性能,并对其优缺点进行了分析,有效结合各种防护措施,就可以大大降低水锤事故的发生。然后,介绍水锤计算的基本原理及特征线算法,结合防护设备.的结构及性.能特点,计算长距离.大管径输.水管道中水锤防护.措施的.边界条件,以Microsoft Visual C++为模拟计算工具,对长距离大管径水锤进行水锤模拟计算。本文最后对淮南市引大别山优质水源工程、含山县含城自来水长江水源工程和湖北枣阳石梯水库供水工程非稳定流工况进行水锤计算与分析,通过各种工况下水锤防护方案的分析和计算对比,总结长距离大管径水锤防护的最适合措施,此后希望对同类型工程关于水锤防护方面的研究有一定的借鉴意义。
[Abstract]:Water is an irreplaceable limited natural resource. The regional water shortage caused by the uneven distribution of water resources in China has become a restrictive factor for the development of cities. In recent years, countries and most places have vigorously developed the construction of long-distance water diversion projects. Due to the particularity and complexity of water conveyance projects, there are many problems in long-distance water conveyance, among which the most common are, The most prominent problem is water hammer protection for long distance water conveyance pipeline. Therefore, enough attention should be paid to the safety protection of water conveyance pipeline. Firstly, this paper briefly introduces the background of the subject and the significance of water hammer research, and briefly describes the basic concept of water hammer. The cause of formation, harm and the development of water hammer at home and abroad. In this paper, the characteristics of water hammer in long distance and large diameter pipeline are introduced in detail, in the direction of the best operating condition and water hammer protection scheme of long distance and large diameter water conveyance system. The key point of water hammer protection is to stop current and close water hammer protection. The theory of air bag movement and pressure fluctuation and the best exhaust mode are analyzed. This paper puts forward that the main protection of water hammer with long distance and large diameter should be steady pressure and exhaust, and introduces in detail the structure, function and performance of the commonly used protective equipment, such as slow closed check valve, intake and exhaust valve, overpressure relief valve and box-type bi-directional pressure regulating tower, etc. The advantages and disadvantages of this method are analyzed, and the effective combination of various protective measures can greatly reduce the occurrence of water hammer accidents. Then, the basic principle of water hammer calculation and the algorithm of characteristic line are introduced, combined with the structure and characteristics of protective equipment. Long distance calculation. Large diameter transmission. Water hammer protection in water pipeline. Boundary conditions. Microsoft Visual C as a simulation tool. The water hammer of long distance and large diameter is simulated and calculated. Finally, the high quality water source project of the Dabie Mountain in Huainan City is studied. Water hammer calculation and analysis are carried out under the unsteady flow conditions of the Yangtze River water source project with urban tap water in Hanshan County and the water supply project of Zaoyangshiti Reservoir in Hubei Province. Through the analysis and calculation comparison of water hammer protection schemes under various working conditions, This paper summarizes the most suitable measures for the protection of long distance large diameter water hammer, and hopes that it can be used for reference in the study of water hammer protection in the same type of engineering.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU991.39

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