CompactRIO在阀门内漏自动测试系统中的应用

介绍了计算机测试系统发展现状、设计原则以及应用于阀门内漏自动检测的工作原理、系统配置和检测程序。     

一种大型低压脉冲阀的研究

脉冲阀是脉冲袋式除尘器清灰装置的核心部件,其处理能力的大小,喷吹性能的优劣,直接关系到该类除尘设备的运行能耗、设备投资及占地面积,也影响到其更为广泛的应用。介绍了一种新开发的φ120大型低压脉冲阀,在脉冲阀大型化方面作了初步研究。     

稳定塔安全阀起跳原因分析及对策

当工艺操作参数波动较大时,尤其是在开工阶段,杨易造成稳定塔安全阀起跳.分析了安全阀起跳的原因,认为主要原因是稳定塔负荷过大及稳定塔塔顶温度过高,提出了相应的预防安全阀起跳的工艺控制措施.     

The dynamic response of pressure relief valves in vapor or gas service. Part II: Experimental investigation

An experimental testing program designed to evaluate the opening stability characteristics of direct acting pressure relief valves (PRV) in gas/vapor service is described. Three different valve sizes from each of three different manufacturers were tested at two different set pressures to determine their opening characteristics (disk lift vs. time). The valves were tested with several different lengths of inlet piping as well as with and without discharge piping to determine the conditions under which unstable operation (chatter) would occur. Part I of this program described a mathematical model for predicting the dynamic response of PRV's, and the data described in this test program were used to evaluate the accuracy of the model, as described in Part III of this study to follow.     

Proton exchange membrane fuel cell purge and fan control using a microcontroller

This study used Programmable System-on-Chip to make a fuel cell controller to manage the fuel cell operating environment. When a proton exchange membrane fuel cell is reacting, its performance is closely related to the operating conditions, such as temperature, water management, etc. This article investigates purge time interval control and the related characteristics. The controller developed in this study is free from additional power requirements, using only the power provided by the fuel cell.     

负压反吹布袋除尘器三通换向阀的研究与应用

本文介绍负压反吹风布袋除尘器中一种新型的三通换向阀.该阀门具有结构简单、密封性能好,切换迅速、维修方便等特点.     

发供电企业倒闸作业误操作事故原因及对策

在发供电企业,操作员在倒闸作业时发生误操作的事故较多。针对导致误操作的几个原因如安全意识差,执行安全规章制度不严,不遵守倒闸操作规定,交叉作业多等,采取了一系列预防措施,取得了较好的效果。     

埋弧自动焊技术在阀门生产中的应用

针对高温高压电站阀门体 座连接焊的“深孔环缝”特点 ,采用埋弧自动焊接方法进行了材料选择和焊接工艺评定实验 ,选择了合适的焊材及工艺并成功地应用于生产。     

自然保护区经济价值评价探讨

概括论述自然保护区社会经济价值的表现形式、类型及作用等，对资源直接、间接和潜在用途的社会经济价值估算方式、方法及评价进行了探讨。     

自动抢接止回阀装置液压系统设计及仿真分析

利用井口自动化装置进行石油钻井过程中溢流、井喷时的关井作业是目前井控作业的热点。为了有效减少工作人员操作时间,保证装置的可靠性。提出了1种自动抢接止回阀装置,并将装置的控制系统设计成全液压系统。基于AMEsim对设计的液压系统进行建模以及模拟仿真分析,得到了执行元件（3个液压马达和1个伸缩液压缸）的输出特性曲线,然后与理论计算、设计及选型的执行元件的参数进行对比。研究结果表明:设计的液压回路可以确保自动抢接止回阀装置的整个工作过程正常、稳定的进行。设计的自动抢接止回阀装置的性能基本满足使用要求,具有一定的实用价值。