阀门密封性自动化检测系统设计

Design of Automated Valve Sealing Integrity Detection System

摘要: 阀门是控制流体流量和流向的重要设备，其密封性直接影响着阀门的使用效果和安全性能，因此，在工业生产中对阀门泄漏率的精确检测非常重要。针对使用国内阀门泄漏率检测装置精度低、使用国外阀门泄漏率检测装置成本高的问题，采用直压法检测阀门密封性的原理，开发出一套低成本、高精度的直压法阀门泄漏率自动化检测系统。该系统由可编程序控制器PLC (programmable logic controller)、触摸屏和传感器等组件组成。通过触摸屏设置系统的相关参数，将信号发送给PLC，PLC对获取的输入信号进行处理，根据写入的程序将输出信号传输给执行器，最后将检测结果传回到触摸屏。测试的全过程为自动进行，通过借助人机交互，可以方便地进行基本参数的设置，并最终实现对阀门泄漏率的自动化检测。

Abstract: Valves are important devices for controlling fluid flow and direction, and their sealing performance directly affects effectiveness and safety of valves. Therefore, accurate detection of valve leakage rate is crucial in industrial production. To address issues of low precision in domestic valve leakage rate detection devices and high cost of foreign devices, principle of using direct pressure method to test air tightness of valves. A low-cost, high-precision direct pressure method valve leakage rate automated detection system has been developed. The system consists of a PLC (programmable logic controller), a touchscreen, sensors, and other components. By setting relevant parameters through touchscreen, signals are sent to PLC. PLC processes the input signals and transmits output signals to actuator based on the programmed instructions. Finally, detection results are transmitted back to touchscreen. The entire testing process is automated, and with assistance of human-machine interaction, basic parameters can be easily set, ultimately achieving automated detection of valve leakage rate.