本文關鍵詞： 壓力調(diào)節(jié)閥 對接 可靠性 數(shù)值模擬 優(yōu)化分析　出處：《北京化工大學》2015年碩士論文　論文類型：學位論文

【摘要】：隨著我國煉油工業(yè)技術(shù)的發(fā)展,現(xiàn)在國內(nèi)已經(jīng)基本上形成了以干線管道為主骨架的成品油管道網(wǎng),當要對一些局部地區(qū)臨時提供油料時即可通過連接裝配式輸油管線來從成品油管道中導出油料。為了適應長距離的輸送情況,成品油管線中的流體壓力一般高于10MPa,而裝配式輸油管線則為了便于運輸和安裝采取輕量化設計,所允許的工作壓力一般在6MPa以下。故為了保證整條臨時供油管線的工作安全,在導出油料時需要使用壓力調(diào)節(jié)閥作為壓力轉(zhuǎn)換裝置來保護成品油管線和裝配式輸油管線,因此深入了解壓力調(diào)節(jié)閥在對接工作時的內(nèi)部流場情況、判斷壓力調(diào)節(jié)閥在工作中的安全可靠性就顯得尤為重要。本文即針對一種設計用于成品油管線與裝配式輸油管線對接中的壓力調(diào)節(jié)閥主要做了以下工作：1.根據(jù)調(diào)節(jié)閥相關理論知識及實際工作時的對接工況分析出本課題所研究壓力調(diào)節(jié)閥的結(jié)構(gòu)特點、工作原理及相關特性。2.對初設計壓力調(diào)節(jié)閥內(nèi)部流場進行仿真模擬計算,得到初設計結(jié)構(gòu)在對接工作條件下內(nèi)部流場速度、壓力、流線等的分布情況,并分析得到其計算流量特性曲線,根據(jù)模擬結(jié)果及工作要求,確定初設計結(jié)構(gòu)可以安全可靠的用于對接工作中。3.對改進后的壓力調(diào)節(jié)閥內(nèi)部流場進行仿真模擬,得到改進后結(jié)構(gòu)在對接工作條件下的內(nèi)部流場可視化圖形及流量特性曲線,根據(jù)仿真結(jié)果及工作要求確定改進后的壓力調(diào)節(jié)閥的工作安全可靠性,同時對改進后的壓力調(diào)節(jié)閥進行試驗,試驗與模擬結(jié)果進行對比得出二者的趨勢一致,進而驗證了模擬方法的正確可靠性。4.對比改進前后兩種結(jié)構(gòu)下的壓力調(diào)節(jié)閥內(nèi)部流場及相關特性參數(shù),說明齒形串級結(jié)構(gòu)對整個閥內(nèi)部流場的節(jié)流減壓、防止空化等的影響。5.根據(jù)工程情況及對接工作中的可靠性要求,對改進后壓力調(diào)節(jié)閥的二級節(jié)流孔形狀進行優(yōu)化設計,同樣對優(yōu)化方案進行模擬分析并與優(yōu)化前相對比,得出優(yōu)化后方案的優(yōu)勢,為這種壓力調(diào)節(jié)閥日后能夠更好、更安全可靠地用于對接輸油工作中提供借鑒。
[Abstract]:With the development of oil refining technology in China, a network of refined oil pipelines with backbone as the backbone has been basically formed in China. When temporary oil supplies are to be provided to some local areas, oil can be derived from finished oil pipelines by connecting assembly pipelines. The fluid pressure in the finished oil pipeline is generally higher than 10 MPA, and the working pressure is generally less than 6 MPA in order to facilitate the transportation and installation of the assembly pipeline, so as to ensure the safety of the whole temporary oil supply pipeline, It is necessary to use the pressure regulating valve as the pressure conversion device to protect the finished oil pipeline and the assembled oil pipeline when the oil is exported. Therefore, the internal flow field of the pressure regulating valve in the docking operation is deeply understood. It is very important to judge the safety and reliability of pressure regulating valve in work. In this paper, we mainly do the following work: 1. The related theory knowledge of the throttling valve and the docking condition of the practical work have analyzed the structural characteristics of the pressure regulating valve studied in this subject. The internal flow field of the initial design pressure regulating valve is simulated and calculated, and the distribution of the velocity, pressure, streamline and so on of the initial design structure under the condition of docking operation is obtained. According to the simulation results and working requirements, it is determined that the initial design structure can be safely and reliably used in docking. 3. The internal flow field of the improved pressure regulating valve is simulated. The visual figure of internal flow field and flow characteristic curve of the improved structure under the condition of docking operation are obtained, and the safety and reliability of the improved pressure regulating valve are determined according to the simulation results and the working requirements. At the same time, the improved pressure regulating valve is tested, and the results of test and simulation show that the trend is the same. Furthermore, the correct reliability of the simulation method is verified. 4. Comparing the internal flow field and related characteristic parameters of the pressure regulating valve with the two structures before and after the improvement, the throttling decompression of the tooth profile cascade structure to the whole internal flow field of the valve is explained. According to the engineering conditions and reliability requirements in docking work, the shape of the secondary throttling hole of the improved pressure regulating valve is optimized, and the optimization scheme is simulated and analyzed and compared with that before the optimization. The advantages of the optimized scheme can provide a reference for the pressure regulating valve to be used in docking and transporting oil more safely and reliably in the future.
【學位授予單位】：北京化工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE967

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本文編號：1525541