导读：阀门电动执行器的电动执行器带有极限终点限位开关，到终点能自动切断电路，同时为了保障工程安全，阀门电动执行器设有电力过载保护装置和信号灯指示。
Introduction:The electric actuator of the valve electric actuator has the limit terminal limit switch, which can automatically cut off the circuit at the end. In order to ensure the safety of the project, the valve electric actuator is equipped with electric overload protection device and signal light indicator.

阀门电动执行器的故障分析
Failure analysis of valve electric actuator

阀门电动执行器安装现场图
Field diagram of valve electric actuator installation

阀门电动执行器可以分为电动对夹式蝶阀和电动法兰式蝶阀，该类阀门是依靠电动执行器的电机工作，带动蝶阀的阀轴转动，阀轴又带动蝶板旋转90°来实现阀门的启闭，可以做截断和调节流量使用。阀门电动执行器的电动执行器带有极限终点限位开关，到终点能自动切断电路，同时为了保障工程安全，阀门电动执行器设有电力过载保护装置和信号灯指示。本文介绍阀门电动执行器可能出现的故障以及对应的解决方法。
The valve electric actuator can be divided into electric pair clip butterfly valve and electric flange butterfly valve. This type of valve is based on electric actuator's motor to work, drives the valve shaft of butterfly valve to rotate, and the valve shaft drives the butterfly plate to rotate 90 degrees to realize the valve opening and closing, and can be truncated and adjusted the flow.The electric actuator of the valve electric actuator has the limit terminal limit switch, which can automatically cut off the circuit at the end. In order to ensure the safety of the project, the valve electric actuator is equipped with electric overload protection device and signal light indicator.This paper introduces the possible faults of valve electric actuator and the corresponding solutions.

故障1.阀门电动执行器阀门填料处外漏
Fault 1. leakage at the filling of the valve of the valve electric actuator
发生此类故障的原因有：①填料老化严重。②压盖螺栓没有拧紧或出现松动。
解决方法：①更换新的填料。②均匀的拧紧压盖螺栓。
The causes of such failures are:①The serious aging of fillers.② The gland bolt are not tightened or loosened.
Solutions:①using renewal fillers.②Tighten the cap bolt evenly.
故障2.端盖出现渗漏
Fault 2.Leakage of end cover
发生此类故障的原因有：①螺栓未拧紧。②O型圈损坏。
the causes of such failures are:(1) the bolt is not tightened. (2) O type ring is damaged.
解决方法：①检查螺栓是否松动，将其拧紧。②更换新的O型圈。
Solutions:①Check the loosening of the bolt and tighten it. ②use renewal O type ring.
故障3.密封面发生渗漏
Fault 3. Leakage of sealing surface
发生此类故障的原因有：①蝶板关闭不到位。②密封面存积污垢，导致关闭不严。③密封面损伤。
The causes of such failures are: ①the closure of the sphenoid plate is not in place. ②The sealing surface deposited dirt, which resulted in the lax closure. ③ the damage of the sealing surface.
解决方法：①调整阀门电动执行器电动执行机构上的螺钉，将蝶板关闭到位。②清理密封面的存积污垢。③修补损伤的密封面。
Solutions:①adjust the screws on the electric actuator of the valve electric actuator and close the butterfly plate. ②Clean up the deposit and dirt of the sealing surface. ③ repair the damagedseal surface.
故障4.电动装置运转不灵活导致阀门不能正常启闭
Fault 4.The operation of the electric device is not flexible, resulting in the valve can not normally open and close.

发生此类故障的原因有：①填料压的过紧。②填料的压盖没有紧固到位，发生倾斜。③过度装置故障损坏。
The causes of such failures are:① the packing pressure is too tight.② The gland of the packing is not fastened in place and tilted. ③ fault damage of the overdevice.

解决方法：①填料压盖不要压得过紧，适当放松。②校正填料压盖的垂直度。③更换新的过渡装置。
Solutions:① Packing gland should not be pressed too tightly, shoulid relax properly. ②Correct the perpendicularity of the packing gland. ③use renewal transition device.
故障5.启闭到头了电机没停或者启闭不完全
Fault 5.The motor does not stop or the start and close are not complete
发生此类故障的原因有：①极限开关失灵了或者是过载保护装置不准。②极限开关动作过早或反应太迟。
The causes of such failures are:①The limit switch is out of order, or the overload protection device is not allowed. ②The limit switch works too early or too late.
解决方法：①更换极限开关或者对过载装置做调整，保证度。②调整极限开关的反应速度。
Solutions:①use renewal limit switch or adjust the overload device to ensure accuracy. ②Adjust the reaction speed of the limit switch.