本文關(guān)鍵詞： 封堵器 機械切口 導(dǎo)向輔助器 直角拐彎 送進接頭 仿真　出處：《西安工業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：管道是目前長距離輸送石油、天然氣等物資的主要運輸工具,然而管道如果發(fā)生泄漏,會給自然環(huán)境以及人類經(jīng)濟帶來嚴(yán)重的損失,因此,管道封堵器在管道封堵過程中有重要的意義。但由于在搶修過程中,管道封堵器存在送進距離短以及施工結(jié)束后留有機械切口的問題,會影響管道維修過程中的安全動火系數(shù)和后續(xù)的管道維修工作在對管道封堵器送進距離短和施工結(jié)束后留有機械切口的問題進行分析的基礎(chǔ)上將DNF封堵裝置、新型鏈?zhǔn)椒舛卵b置、柔性鏈?zhǔn)浇Y(jié)構(gòu)三種送進方案進行對比分析,確定了封堵器送進方案,解決了封堵器送進距離短的問題；通過將齒輪齒條結(jié)構(gòu)、蝸輪蝸桿結(jié)構(gòu)、鏈條結(jié)構(gòu)三種直角拐彎結(jié)構(gòu)進行對比分析,解決了封堵器直角拐彎的問題。首先為了使送進機構(gòu)實現(xiàn)直角拐彎動作,通過約束鏈?zhǔn)浇Y(jié)構(gòu)的部分自由度,并對送進接頭的通過性進行了分析,得到了送進接頭的外形尺寸；為了減小送進接頭和管道內(nèi)壁間的摩擦力,采取設(shè)計了一個送進接頭支撐導(dǎo)輪的方式,保證送進接頭的中心線和管道中心軸線在一條直線上,從而將滑動摩擦轉(zhuǎn)換為滾動摩擦。其次為了使直角拐彎送進機構(gòu)順利通過導(dǎo)向輔助器,通過對導(dǎo)向輔助器曲線的結(jié)構(gòu)特點進行分析,建立了導(dǎo)向輔助器與送進接頭的幾何約束數(shù)學(xué)模型,使用MATLAB遺傳算法對導(dǎo)向輔助器的數(shù)學(xué)模型進行了優(yōu)化求解,得到了導(dǎo)向輔助器的最優(yōu)尺寸。為了檢驗送進接頭的強度和通過性,在用Pro/E完成對送進接頭建模的基礎(chǔ)上,首先使用ANSYS對送進接頭的變形及應(yīng)力進行分析,其次使用ADAMS對送進過程進行了仿真和優(yōu)化。仿真結(jié)果表明：在送進過程中,送進接頭強度符合要求,直角拐彎送進機構(gòu)運動平穩(wěn),與管道及導(dǎo)向輔助器之間沒有結(jié)構(gòu)干涉,滿足將封堵囊直角拐彎水平送進5000mm的要求。
[Abstract]:Pipeline is the main means of transporting oil, natural gas and other materials over long distances. However, if the pipeline leaks, it will bring serious losses to the natural environment and human economy. Pipeline plugging device is of great significance in the process of pipeline plugging. However, in the process of rush repair, the pipeline plugging device has the problems of short input distance and mechanical cut after construction. The safety fire coefficient and the subsequent pipeline maintenance work will affect the pipeline maintenance process. On the basis of analyzing the problems of short feeding distance of pipeline plugging device and leaving mechanical notch after construction, the DNF sealing device is put forward. . Comparing and analyzing three kinds of feeding schemes of new type chain plugging device and flexible chain structure, the feeding scheme of plugging device is determined, and the problem of short feeding distance of occluder is solved. By comparing and analyzing three kinds of right-angle bending structure, such as gear rack structure, worm structure and chain structure, the problem of right corner of occluder is solved. By constraining the degree of freedom of the chain structure and analyzing the transmissivity of the feed joint, the shape and size of the feed joint are obtained. In order to reduce the friction between the feed joint and the inner wall of the pipe, a support guide wheel is designed to ensure that the center line of the feed joint and the central axis of the pipe are in a straight line. Then the sliding friction is converted into the rolling friction. Secondly, in order to make the right corner feed mechanism smoothly through the guide assistant, the structural characteristics of the guide auxiliary curve are analyzed. The geometric constraint mathematical model of guide assistant and feed joint is established, and the mathematical model of guide assistant is optimized by MATLAB genetic algorithm. In order to test the strength and transmissivity of the feed joint, the model of the feed joint is built with Pro/E. First, ANSYS is used to analyze the deformation and stress of the feed joint, and then the ADAMS is used to simulate and optimize the feeding process. The simulation results show that: in the feeding process. The strength of the feed joint meets the requirements, the movement of the right corner feeding mechanism is stable, and there is no structural interference with the pipeline and the guide auxiliary device, which meets the requirement of putting the right angle corner of the sealing capsule into the 5000mm level.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TE973

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