新型液囊外封堵装置性能分析

发布时间：2018-02-04 00:58

本文关键词： 泄漏自适应导流液囊封堵复杂曲面的封堵安装阻力　出处：《机械设计与制造》2017年11期 　论文类型：期刊论文

【摘要】：流程工业中危险化学物料在储运过程中的泄漏事故频发,对漏点快速有效的处理处置至关重要。针对大型管道与储罐焊缝等复杂曲面区域的泄漏工况,提出一种采用磁力安装定位,以连杆推进机构提供动力,通过环形腔体内部液体的流动特性适应复杂曲面的封堵工况,可对封堵工况进行实时监测和自动修正的新型液囊外封堵装置。对其相应封堵模型的有限元分析表明,该封堵装置通过导流可有效降低封堵操作过程中由于泄漏流体压力引起封堵设备安装阻力,对泄漏流体进行有效的回收,减少物料流失。环形液囊结构将推进机构加载在钢性壳体的集中载荷,转化为流体内部压力以垂直于封堵面的法向方向均匀的加载在密封垫圈的外侧,改善密封垫圈的受载环境,使封堵面的压力均匀分布,有效避免了垫圈局部应力集中现象,对凹凸起伏的不规则曲面有很强的自适应性能。相对于气囊封堵具有机构简单、易操作、成本低、无需配套充气设备的特点,在温度的变化的工况具有更强的适应能力。
[Abstract]:The frequent leakage of hazardous chemical materials in the process of storage and transportation is of great importance to the rapid and effective disposal of leakage points, aiming at the leakage conditions in complex curved surface areas such as large pipelines and tank welds. In this paper, a magnetic installation positioning system is proposed, which is powered by a connecting rod propulsive mechanism and adapts to the plugging condition of complex surfaces through the flow characteristics of the liquid in the annular cavity. A new type of external plugging device can be used for real-time monitoring and automatic modification of the plugging conditions. The finite element analysis of the corresponding plugging model shows that the new device can be used for sealing. The plugging device can effectively reduce the installation resistance of the sealing equipment due to the pressure of the leakage fluid during the plugging operation, and effectively recover the leaking fluid through the diversion. To reduce material loss. The circular liquid bag structure loads the thrust mechanism in the concentrated load of the steel shell, and converts the internal pressure of the fluid to the normal direction perpendicular to the sealing surface and loads uniformly on the outer side of the seal washer. The loading environment of the sealing gasket is improved and the pressure on the sealing surface is uniformly distributed, which effectively avoids the phenomenon of local stress concentration of the gasket. Compared with airbag sealing, it has the characteristics of simple mechanism, easy operation, low cost and no need of matching inflatable equipment. In the temperature variation of the operating conditions have a stronger adaptability.
【作者单位】：中北大学机械与动力工程学院;
【基金】：山西省重点研发计划社会发展资助项目(201603D321117) 山西省自然科学基金基础研究资助项目(2013011026-2)
【分类号】：TE972;TQ055.81
【正文快照】： 1引言随着化工生产规模发展和不断扩大,管网和设备运行压力不断提高。由于自身缺陷、环境因素和人为因素造成的泄露事故时有发生,造成人员伤亡和环境污染及能源浪费[1-2]。管道及设备泄漏的封堵工作成为了现代石油化工生产和储运过程中非常重要的环节,迫切需要快速、有效、安

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