The calculation software is compiled with the object-oriented programming language Visual Basic 6.0 to select correct safety valve and calculate the closed-system exhaust reaction force. This software can run in the Windows XP,Windows 7,and Windows 8. The modularization compiling mode is adopted in the whole software,in which the characteristic parameters of water vapor are integrated. The interfacial design is coherent,and the operation is simple. The practical software meets the en-gineering design requirements,and directly displays the form of the exhaust port. The model-selection judgement of the safety valve and the calculation of the exhaust pipe counterforce were realized under various working conditions.%针对安全阀的选型及闭式系统中排汽反力的计算问题,采用面向对象的程序设计语言Visual Basic 6.0编写专业计算软件.软件在Windows XP和Windows 7,Windows 8环境下运行通过.整个软件采用模块化编写,集成了水蒸汽的特性参数,界面设计简洁,功能实用,操作简便.该软件以工程设计需求为依据,直观展现了排汽口的形式,实现了对安全阀选型的判断和不同工况下安全阀开启对设备的反力、各种布置形式的排汽管道反力的计算.
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