带压密封技术专家系统的开发研究

发布时间：2018-11-19 07:18

【摘要】：在石油、化工等过程工业中,容器及设备常因腐蚀、生产波动等不利因素发生泄漏。带压密封技术能够在不停车情况下对泄漏部位进行有效处理,目前在各个行业被广泛应用。带压密封技术可以有效避免停车引起的经济损失。但调研发现,抢修人员对带压密封相关的规范和标准认识不够,泄漏事故发生后往往依照经验进行设计夹具及施工作业,留下了夹具失效的隐患。并且,手工按规范进行夹具设计和施工需花费大量时间,容易错失最佳堵漏时机。因此,本文以带压密封相应规范标准为理论基础,通过Visual Basic语言结合AutoCAD、 Access等软件,建立了涵盖带压密封标准查询、夹具设计、CAD图纸绘制、辅助功能、案例保存等各使用环节功能的带压密封技术专家系统。本文主要内容及结论如下： (1)介绍了带压密封夹具的相关背景和国内外研究现状,通过对现有带压密封软件功能需求进行分析,设计了带压密封技术专家系统结构框架和各子功能模块。 (2)对带压密封夹具理论和结构设计进行了详细研究,对现有带压密封夹具设计公式进行了总结归纳,并改进部分法兰、直管形式的密封夹具设计公式。基于以上设计公式建立了涵盖绝大部分带压密封夹具设计模块,实现了常用带压密封夹具的快速设计。 (3)对现有的AutoCAD二次开发方式进行介绍,建立了带压密封夹具CAD功能所使用的开发实用技术。并综合考虑带压密封夹具设计特点及软件、硬件、系统兼容性等方面因素,采用ActiveX Automation二次开发方式开发了带压密封夹具CAD功能模块,实现了CAD简图绘制和CAD比例绘制两大类功能,为不同场合的夹具图形绘制提供了不同的选择,有效提高了工程人员的图纸绘制的准确性及绘制效率。 (4)以Access、 Excel数据库处理软件为基础,通过ADO数据库接口及控件数据绑定技术建立了带压密封数据库,包括带压密封图形库、文档库、通用参数库、案例库等子数据库。数据库涵盖HG/T20201-2007、 GB/T26468-2011等带压密封相关标准规范及特种设备法规,并保存了几乎所有标准所涉及类型的夹具图纸模板,还包括材料许用应力、高温屈服强度、持久强度等GB/T150-2011上规定的所有材料特性参数,以及带压密封案例框架结构和已有案例的保存工作。带压密封数据库保证了相关数据的有效管理和充分利用,为带压密封专家系统各功能模块的正常使用提供了基础。 (5)给出了带压密封技术专家系统在大连某石化企业的应用实例。应用结果表明该系统能够有效完成带压密封各环节设计工作,大幅减轻设计人员的工作负担,有效提高了带压密封整体环节的工作效率。
[Abstract]:In petroleum, chemical and other process industries, containers and equipment often leak due to corrosion, production fluctuations and other adverse factors. The technology of pressure seal can deal with leakage effectively without stopping, so it is widely used in various industries. Pressure sealing technology can effectively avoid the economic loss caused by parking. But the investigation found that the emergency repair staff do not know enough about the relevant norms and standards of the seal with pressure, and often design the fixture and the construction operation according to the experience after the leakage accident, leaving the hidden trouble of the fixture failure. Moreover, it takes a lot of time to design and construct the fixture according to the specification by hand, so it is easy to miss the best time of blocking leakage. Therefore, based on the corresponding standard of pressure seal, this paper establishes the standard inquiry, fixture design, drawing of CAD drawing, auxiliary function by Visual Basic language combined with AutoCAD, Access and other software, which covers the standard inquiry of pressure seal, fixture design, drawing of CAD drawing, auxiliary function, and so on. Case preservation and other use of links with the use of pressure sealing technology expert system. The main contents and conclusions of this paper are as follows: (1) the background and research status of pressure sealing fixture at home and abroad are introduced, and the functional requirements of existing sealing software with pressure are analyzed. The structure frame and sub-function modules of expert system with pressure seal technology are designed. (2) the theory and structure design of the sealing fixture with pressure are studied in detail, and the existing formula for the design of the clamp with pressure is summarized and summarized, and the formula for the design of the sealing fixture in the form of partial flange and straight pipe is improved. Based on the above design formula, the design module covering most of the clamping fixture with pressure is established, and the rapid design of the commonly used clamping fixture with pressure is realized. (3) the existing secondary development method of AutoCAD is introduced, and the practical development technology of CAD with pressure sealing fixture is established. Considering the design characteristics, software, hardware, system compatibility and other factors of the clamping fixture with pressure, the CAD function module of the clamp with pressure seal is developed by using ActiveX Automation secondary development mode. The functions of CAD schematic drawing and CAD proportional drawing are realized, which provides different choices for fixture drawing in different situations, and effectively improves the accuracy and efficiency of drawing of engineers. (4) based on the Access, Excel database processing software, through the ADO database interface and the control data binding technology, the paper establishes the pressure-sealed database, including the graphic database with pressure seal, the document library, the general parameter database, the case database and so on. The database covers HG/T20201-2007, GB/T26468-2011 and other relevant standards and specifications for pressure seals and regulations for special equipment, and preserves almost all types of fixture drawing templates covered by the standards, including allowable stress of materials, high temperature yield strength, All material characteristic parameters specified on GB/T150-2011, such as durable strength, as well as the frame structure of pressure-sealed cases and the preservation of existing cases. The database of pressurized seal ensures the effective management and full utilization of the relevant data, and provides the basis for the normal use of each functional module of the expert system with pressure seal. (5) the application of expert system with pressure seal technology in a petrochemical enterprise in Dalian is given. The application results show that the system can effectively complete the design work of each link of the seal with pressure, greatly lighten the workload of the designer, and effectively improve the working efficiency of the whole link of the seal with pressure.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB42

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