發(fā)布時(shí)間：2018-05-04 00:09

  本文選題：提灌泵站 + 壓力管道　； 參考：《華北水利水電大學(xué)》2017年碩士論文

【摘要】：河南省洛陽市洛寧縣是省定優(yōu)質(zhì)烤煙生產(chǎn)基地,轄內(nèi)的小界鄉(xiāng)和東宋鎮(zhèn),是洛寧煙葉主產(chǎn)區(qū)。小界鄉(xiāng)和東宋鎮(zhèn)均屬于渡洋河流域,但是這兩個(gè)鄉(xiāng)沒有蓄水取水工程,農(nóng)業(yè)水資源缺乏。為了提高煙葉及其他農(nóng)業(yè)生產(chǎn)水平,在洛寧縣洛河一條支流渡洋河上修建渡洋河大石澗水源工程,通過建設(shè)水庫、泵站與輸水管道、輸水渠道,調(diào)節(jié)水資源時(shí)空分布,提高農(nóng)業(yè)水資源開發(fā)利用效率。泵站建設(shè)中合理分析提灌工程的規(guī)模和設(shè)計(jì)運(yùn)行方案,對(duì)降低工程造價(jià)、優(yōu)化設(shè)計(jì)、工程安全運(yùn)行具有非常重要的意義;而在供水管道系統(tǒng)中,由于管道中水流速度的突然變化而引起管內(nèi)壓力變化,壓力迅速上升或者壓力迅速下降會(huì)導(dǎo)致管路破壞和泵站系統(tǒng)中設(shè)備破壞,更嚴(yán)重的可導(dǎo)致泵站建筑物的崩塌,因此管路水錘計(jì)算與防護(hù)成為保障提水輸水系統(tǒng)安全運(yùn)行的重要依據(jù)。在此背景下,本文以渡洋河大石澗水源工程為例,進(jìn)行了泵站水力機(jī)械及壓力管道水錘計(jì)算研究,主要內(nèi)容和結(jié)論如下:1.根據(jù)規(guī)范進(jìn)行了大石澗提灌工程的供水規(guī)模、泵站設(shè)計(jì)流量、泵站供水方案以及泵站水力機(jī)械選型分析,確定了水源特征水位及高位水池的池底高程、水泵的揚(yáng)程、水泵的型號(hào)及臺(tái)數(shù)、水泵運(yùn)行工況曲線以及水泵安裝高程等重要設(shè)計(jì)參數(shù),并對(duì)南北岸一級(jí)和二級(jí)泵站配套機(jī)電的功率進(jìn)行了復(fù)核。2.基于水錘計(jì)算的相關(guān)分析方法、步驟以及各種水錘保護(hù)措施的邊界條件,以大石澗提灌工程北岸二級(jí)泵站為例,建立了大石澗提灌工程中用旁通管作為防護(hù)措施的理論模型,利用水錘計(jì)算相關(guān)軟件,針對(duì)不同特征工況進(jìn)行了水錘計(jì)算分析。3.通過對(duì)大石澗提灌工程供水管道不設(shè)防護(hù)措施和設(shè)置防護(hù)措施的水力過渡過程的比較,提出針對(duì)輸水壓力管道水錘防護(hù)的兩種方案:在管路上設(shè)置空氣閥門,對(duì)管路進(jìn)行補(bǔ)氣,防止管道內(nèi)壓力降低;在泵站出口安裝緩閉蝶閥,防止管道內(nèi)壓力升高。
[Abstract]:Luoning County, Luoyang City, Henan Province is a high quality flue-cured tobacco production base. Xiaojie Township and Dongsong Town both belong to the Duyang River basin, but these two townships have no water storage project and lack of agricultural water resources. In order to improve the level of tobacco leaf and other agricultural production, the water source project of Dashijian, a tributary of Luohe River, Luoning County, was built to regulate the spatial and temporal distribution of water resources through the construction of reservoirs, pumping stations and water pipelines, water conveyance channels, etc. We will improve the efficiency of agricultural water resources development and utilization. The reasonable analysis of the scale and design operation scheme of pumping station is of great significance to reduce the project cost, optimize the design and run safely in the water supply pipeline system. Because of the sudden change of the flow velocity in the pipeline, the pressure in the pipe will change rapidly, the pressure will rise rapidly or the pressure will drop rapidly, which will lead to the failure of the pipeline and the equipment in the pumping station system, and even more serious to the collapse of the building of the pump station. Therefore, the calculation and protection of pipeline water hammer becomes an important basis to ensure the safe operation of water conveyance system. Under this background, taking the water source project of Dashijian in Duyang River as an example, the hydraulic machinery and water hammer of pressure pipe in pumping station are calculated and studied in this paper. The main contents and conclusions are as follows: 1. According to the specification, the scale of water supply, the design flow rate of pump station, the water supply scheme of pump station and the type selection of hydraulic machinery of pump station are carried out. The characteristic water level of water source, the elevation of pool bottom of high water pool and the head of water pump are determined. Some important design parameters, such as the type and the number of pumps, the operating condition curve of the pump and the installation height of the pump, are discussed. The power of the primary and secondary pumping stations in the north and south coast is reviewed. Based on the relevant analysis methods, steps and boundary conditions of various water hammer protection measures, a theoretical model of using bypass pipes as protective measures in Dashijian uplift Irrigation Project is established with the example of the second stage pump station on the north bank of Dashijian uplift Irrigation Project. By using the software of water hammer calculation, the water hammer calculation and analysis for different characteristic working conditions are carried out. By comparing the hydraulic transition process of water supply pipeline without protective measures and setting protective measures in Dashijian uplift Irrigation Project, two schemes of water hammer protection for water conveyance pressure pipeline are put forward: setting air valve on pipeline to replenish air to pipe line. Prevent pipeline pressure from decreasing; install slow-closing butterfly valve at pump station outlet to prevent pressure rising.
【學(xué)位授予單位】：華北水利水電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：S277.9

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