为解决电动闸阀卡涩问题,以某核电厂电动闸阀为例,本文通过理论计算和有限元仿真分别研究了卡涩时所需的开阀阀杆拉力和执行机构扭矩,以及电动闸阀阀杆最大允许拉力.结果表明,电动闸阀卡涩情况下开阀所需执行机构的扭矩大于电动装置的设定扭矩.电动闸阀阀杆最大允许拉力为319392.5 N,在此开阀阀杆拉力值下所需的执行机构扭矩接近电动装置的额定扭矩.阀门卡涩时的开阀方案首选增大电动装置的设定扭矩,但不能超过 2953.3 N·m.如电动装置失效,可使用专用的应急手动开阀工具进行辅助开阀.
To solve the problem of electric gate valve jamming,taking a nuclear power plant electric gate valve as an example,the required opening valve stem tension and the actuator torque,as well as the maximum allowable tension of the electric gate valve stem,were studied through theoretical calculation and finite element simulation.The results indicate that the torque required for the actuator to open the e-lectric gate valve when it is stuck is greater than the set torque of the electric device.The maximum al-lowable tension of the electric gate valve stem is 319392.5 N,and the required actuator torque under this valve opening stem tension value is close to the rated torque of the electric device.When the valve is stuck,the preferred solution for opening the valve is to increase the set torque of the electric device,but it should not exceed 2953.3 N·m.If the electric device fails,a dedicated emergency manual valve opening tool can be used to assist in valve opening.