成品油长输管道封堵囊送进技术

发布时间：2018-01-30 19:21

本文关键词： 封堵器机械切口导向辅助器直角拐弯送进接头仿真　出处：《西安工业大学》2016年硕士论文　论文类型：学位论文

【摘要】：管道是目前长距离输送石油、天然气等物资的主要运输工具,然而管道如果发生泄漏,会给自然环境以及人类经济带来严重的损失,因此,管道封堵器在管道封堵过程中有重要的意义。但由于在抢修过程中,管道封堵器存在送进距离短以及施工结束后留有机械切口的问题,会影响管道维修过程中的安全动火系数和后续的管道维修工作在对管道封堵器送进距离短和施工结束后留有机械切口的问题进行分析的基础上将DNF封堵装置、新型链式封堵装置、柔性链式结构三种送进方案进行对比分析,确定了封堵器送进方案,解决了封堵器送进距离短的问题；通过将齿轮齿条结构、蜗轮蜗杆结构、链条结构三种直角拐弯结构进行对比分析,解决了封堵器直角拐弯的问题。首先为了使送进机构实现直角拐弯动作,通过约束链式结构的部分自由度,并对送进接头的通过性进行了分析,得到了送进接头的外形尺寸；为了减小送进接头和管道内壁间的摩擦力,采取设计了一个送进接头支撑导轮的方式,保证送进接头的中心线和管道中心轴线在一条直线上,从而将滑动摩擦转换为滚动摩擦。其次为了使直角拐弯送进机构顺利通过导向辅助器,通过对导向辅助器曲线的结构特点进行分析,建立了导向辅助器与送进接头的几何约束数学模型,使用MATLAB遗传算法对导向辅助器的数学模型进行了优化求解,得到了导向辅助器的最优尺寸。为了检验送进接头的强度和通过性,在用Pro/E完成对送进接头建模的基础上,首先使用ANSYS对送进接头的变形及应力进行分析,其次使用ADAMS对送进过程进行了仿真和优化。仿真结果表明：在送进过程中,送进接头强度符合要求,直角拐弯送进机构运动平稳,与管道及导向辅助器之间没有结构干涉,满足将封堵囊直角拐弯水平送进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.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE973

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