阀门电动执行器的原理介绍
Introduction of the principle of valve electric actuator

一，结构介绍
1.structure introduction
什么是电动阀电动阀门？简单地说就是用电动执行器控制阀门,从而实现阀门的开和关。其可分为上下两部分，上半部分为电动执行器，下半部分为阀门。电动阀分两种，一种为角行程电动阀：由角行程的电动执行器配合角行程的阀使用，实现阀门90度以内旋控制管道流体通断；另一种为直行程电动阀：由直行程的电动执行器配合直行程的阀使用，实现阀板上下动作控制管道流体通断。通常在自动化程度较高的设备上配套使用,本阀水平安装调节精度.
What is electric valve? An electric valve is simply an electric actuator that controls valve and in this way can achieve valve's opening and closing. It can be divided into upper and lower parts. The upper part is the electric actuator and the lower part is the valve. There are two kinds of electric valves, one is angle stroke electric valve: it is used by its electric actuator and cooperates with the valve to realize the control of the fluid flow of the valve within 90 degrees; the other is direct stroke electric valve: it is used by its electric actuator and cooperates with the valve to realize the control of the fluid flow of the pipeline through the up and down motion of the valve plate. Usually when used in conjunction with a higher degree of automation equipment, horizontal installation can get the best adjustment accuracy.

二，原理
2．principle
电动阀门操作原理电动阀通常由电动执行机构和阀门连接起来，经过安装调试后成为电动阀。电动阀使用电能作为动力来接通电动执行机构驱动阀门，实现阀门的开关、调节动作。从而达到对管道介质的开关或是调节目的。电磁阀是电动阀的一个种类；是利用电磁线圈产生的磁场来拉动阀芯，从而改变阀体的通断，线圈断电，阀芯就依靠弹簧的压力退回。
The operating principle of electric valve. Electric valve is usually connected by electric actuator and valve, after installation and debugging, it becomes electric valve. The electric valve uses electric energy as a power to switch on the electric actuator driving valve to realize the valve switching and regulating action. In this way can achieve the opening and closing of pipeline medium and the regulating purpose. The solenoid valve is a kind of electric valve, it uses the magnetic field generated by the electromagnetic coil to pull the valve core, thus changing the valve body's on and off, so that the coil is cut off, and the valve core relies on the pressure of the spring to retreat.
三.用途
3．application
电动阀门的用途：电动阀：用于液体、气体和风系统管道介质流量的模拟量调节，是AI控制。在大型阀门和风系统的控制中也可以用电动阀做两位开关控制。电动阀：可以有AI反馈信号，可以由DO或AO控制，比较见于大管道和风阀等。
The application of the electric valve: electric valve: for analog adjustment of the pipeline medium flow of the liquid, gas and wind system, belongs to AI control. In the control of large valves and wind systems, electric valve can also be used for two-position switch control. Electric valve: It can have AI feedback signal, which can be controlled by DO or AO, usually be used in large pipes and dampers.  
Ⅰ.开关形式：电动阀的驱动一般是用电机，开或关动作完成需要一定的时间模拟量的，可以做调节。
Ⅰ. Switch form: the electric valve is usually driven by a motor. The opening or closing operation requires a certain amount of time for analog measurement, and can be adjusted.
Ⅱ.工作性质：电动阀门的驱动一般是用电机，比较耐电压冲击。电磁阀是快开和快关的，一般用在小流量和小压力，要求开关频率大的地方电动阀反之。电动阀阀的开度可以控制，状态有开、关、半开半关，可以控制管道中介质的流量而电磁阀达不到这个要求。气动闸阀：借助压缩空气驱动的阀门。
Ⅱ. The nature of the work: the electric valve is usually driven by a motor, more resistant to voltage shock. Solenoid valves are quick-opening and quick-closing. They are generally used in small flow and small pressure, where the switching frequency is large, and the electric valve is the opposite. The opening of the electric valve can be controlled, and the state can be opened, closed, half-opened and half-closed, which can control the medium flow in the pipeline and the solenoid valve cannot meet this requirement. Pneumatic gate valve: A valve driven by compressed air.