本文選題：長(zhǎng)距離大管徑　切入點(diǎn)：水錘防護(hù)　出處：《長(zhǎng)安大學(xué)》2015年碩士論文

【摘要】：水是不可替代的有限自然資源,我國(guó)的水資源時(shí)空分布不均導(dǎo)致的區(qū)域性缺水嚴(yán)重,成為阻礙城市發(fā)展的制約因素,因此,近幾年國(guó)家以及大部分地方大力發(fā)展長(zhǎng)距離引水工程建設(shè)。由于輸水工程的特殊性和復(fù)雜性,長(zhǎng)距離輸水中存在著很多的問題,其中最常見、最突出的問題是長(zhǎng)距離輸水管線水錘防護(hù)。因此,應(yīng)給予輸水管道的安全防護(hù)問題足夠的重視。首先,本文簡(jiǎn)單介紹了課題背景及水錘研究的意義,簡(jiǎn)述水錘的基本概念、成因、危害以及國(guó)內(nèi)外水錘發(fā)展的狀況。本文以長(zhǎng)距離大管徑輸水系統(tǒng)的最佳運(yùn)行工況和水錘防護(hù)方案為方向,詳細(xì)介紹了長(zhǎng)距離大管徑管道水錘的特點(diǎn),其水錘防護(hù)的重點(diǎn)是斷流彌合水錘防護(hù),分析了管道氣囊運(yùn)動(dòng)升壓理論及各工況下壓力波動(dòng)分析和最佳排氣方式。其次,本文提出了長(zhǎng)距離大管徑的水錘防護(hù)重點(diǎn)應(yīng)該是穩(wěn)壓排氣,詳細(xì)介紹了緩閉止回閥、進(jìn)排氣閥、超壓泄壓閥和箱式雙向調(diào)壓塔等常用防護(hù)設(shè)備的結(jié)構(gòu)、作用和性能,并對(duì)其優(yōu)缺點(diǎn)進(jìn)行了分析,有效結(jié)合各種防護(hù)措施,就可以大大降低水錘事故的發(fā)生。然后,介紹水錘計(jì)算的基本原理及特征線算法,結(jié)合防護(hù)設(shè)備.的結(jié)構(gòu)及性.能特點(diǎn),計(jì)算長(zhǎng)距離.大管徑輸.水管道中水錘防護(hù).措施的.邊界條件,以Microsoft Visual C++為模擬計(jì)算工具,對(duì)長(zhǎng)距離大管徑水錘進(jìn)行水錘模擬計(jì)算。本文最后對(duì)淮南市引大別山優(yōu)質(zhì)水源工程、含山縣含城自來水長(zhǎng)江水源工程和湖北棗陽石梯水庫供水工程非穩(wěn)定流工況進(jìn)行水錘計(jì)算與分析,通過各種工況下水錘防護(hù)方案的分析和計(jì)算對(duì)比,總結(jié)長(zhǎng)距離大管徑水錘防護(hù)的最適合措施,此后希望對(duì)同類型工程關(guān)于水錘防護(hù)方面的研究有一定的借鑒意義。
[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.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU991.39

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本文編號(hào)：1654269