Analysis of working principle of electric valve:
In the moment than the action of electric valve electric valve, electric valve switching speed can be adjusted, simple structure, easy maintenance, action for buffer characteristics of the gas itself in the process, not easy to damage due to get stuck, but must have a gas source, and its control system is more complicated than the electric valve.
Pneumatic valve response is sensitive, safe and reliable, many factory of high control requirements for pneumatic instrumentation control components set the compressed air station. Electric is to electricity. And can control the flow of the device.
A, what is the electric valve, electric valve, in a nutshell is to use control valve electric actuator, so as to realize the valve opened closed. It can be divided into fluctuation two parts, the upper part for electric actuator, the lower part of the valve.
Electric valve is divided into two kinds, a kind of for quarter-turn electric valve: from the Angle of the trip of electric actuators cooperate quarter-turn valves use, within 90 - degree spin valve on-off control pipe fluid; Another to keep travel electric valve: by straight travel electric actuator using with straight trip valve, valve plate up and down movement control pipe flow on and off. Usually on the high degree of automation equipment.
2, electric valve operating principle: electric valve usually linked by electric actuators and valves, become a motorized valve after installation and debugging. Electric valve using electricity as the power to turn on the electric actuator drive valve, switch, adjust the action of valve. So as to achieve medium switch or adjust the purpose of the pipes.
Solenoid valve is a class of electric valve; Is the use of the magnetic field generated by electromagnetic coil to pull the valve core, thereby change the on-off valve body, power coil, valve core will depend on the pressure of the spring return.
Three, the purpose of the electric valve:
Electric valve: for liquid, gas and wind system pipeline medium flow analog control, is the control of AI. In large valve and wind system control can do two switch control with electric valve.
Electric valve: can have AI feedback signal, can be controlled by the DO or AO, is found in large pipe and wind valve, etc.
1. The switch form: electric valve drive is commonly used motor, need time to open or close action of analog, can do to adjust.
2. The nature of work: electric valve drive is commonly used motor, voltage impact resistance. Solenoid valve is closed fast and fast, generally used in small flow rate and pressure, require switching frequency bigger place of electric valve and vice. Electric valve can control the openings of the state is open, closed, half-open half closed, can control the medium inside the pipeline flow and solenoid valve can not reach the requirements.
3. The applicable process: electric valve is typically used to adjust, also has the switch quantity, such as: fan coil terminal.
