Composition and structure of multifunctional electric actuator

The multifunctional electric actuator (mechanism) is the terminal control device of the industrial process measurement and control system. The high temperature solenoid valve can convert the control signal of the system into the angular displacement and linear displacement of the output shaft, and control the position of the shut-off parts such as valves or other The adjustment mechanism makes the controlled medium work in accordance with the state of the system.

　　Multifunctional electric actuators are divided into proportional and integral types according to the control mode. The proportional actuator consists of an electric servo amplifier and an integral actuator. The anti-frost level gauge can compare the control signal of the system with the feedback signal on the output shaft position (closed loop control) to change the stroke of the output shaft to make it It is proportional to the output signal. The integral actuator is composed of a servo motor, a reducer and a position transmitter. It can cooperate with an electric operator to realize remote operation of valves or other adjustment mechanisms.

　　 Because there are many types of valve bodies: straight-through valves, butterfly valves, ball valves, gate valves and so on.

　　Multifunctional electric actuator + various valve bodies form another product-electric regulating valve (also subdivided into: electric regulating through valve, electric regulating butterfly valve, electric regulating ball valve, etc.).

　　 So it is customary for electric actuators to refer to electric actuators without valve bodies.

　　Multifunctional electric actuator This machine consists of a motor, a reduction mechanism, a limit mechanism, an over-torque protection mechanism and a position feedback device.

　　Multifunctional electric actuators are driven by electric motors, and DC current is used as control and feedback signals.

When the host instrument or computer sends out the control signal, the multifunctional electric actuator will act in proportion to the magnitude of the signal, open the valve or damper to the corresponding opening through the output shaft, and feedback the system opening signal back to the control room to complete System adjustment function.

　　Multifunctional electric actuators can also be used with operators, servo amplifiers and other instruments.

　　The function of the manipulator is:

　　A. Transmit the signal, provide visual input and feedback signal value for the operator in the control room to facilitate the observation of the valve position on site.

　　 B. When the control signal fails or the system is overhauled, it can be used to directly operate the multifunctional electric actuator to complete manual manual operation in the case of accident overhaul.

　　 The role of the servo amplifier (ie position locator) is:

　　Signal amplification, it accepts a 4-20mA control signal, the valve actuator amplifies the signal into a strong electric signal that can control the forward and reverse rotation of the motor, and controls the actuator to achieve forward or reverse rotation.

　　 There are two modes of servo amplifier for customers to choose:

　　A. A control panel with a servo amplifier function for the actuator itself, compact structure, no space behind the dashboard, simple installation and debugging (ie, electronic integration).

　　B. The other is a separate position locator, which is installed on the dashboard. This is a more traditional application method, which is easier to repair and replace (ie, discrete proportional adjustment type).

　　Multifunctional electric actuator is connected with various valve bodies to form various regulating valves.

This article is original by the manufacturer of the magnetic turning column level gauge, please indicate http://www.sungofluid.com/