Electric actuator control function
Classification:
Release Time：2018-06-21
At present, there are two types of electric actuators, generally divided into part of the rotary electric actuator and multi-rotary electric actuator, the former mainly control the need for part of the rotary valve, the latter need to rotate the number of turns of the valve. Environmental conditions: refers to the environmental characteristics that can affect the performance of electric actuators, such as temperature, humidity, air pressure, magnetic field, mechanical shock, vibration, dust, etc. 2. Dynamic conditions: refers to the dynamic characteristics that can affect the performance of electric actuators. 3. Load conditions: refers to the load characteristics that can affect the performance of the electric actuator, such as torque, the type and characteristics of the controlled object, etc. 4,
At present, there are two types of electric actuators, generally divided into part of the rotary electric actuator and multi-rotary electric actuator, the former mainly control the need for part of the rotary valve, the latter need to rotate the number of turns of the valve.
Environmental conditions: refers to the environmental characteristics that can affect the performance of electric actuators, such as temperature, humidity, air pressure, magnetic field, mechanical shock, vibration, dust, etc.
2. Dynamic conditions: refers to the dynamic characteristics that can affect the performance of electric actuators.
3. Load conditions: refers to the load characteristics that can affect the performance of the electric actuator, such as torque, the type and characteristics of the controlled object, etc.
4, use and maintenance conditions: the reliability of electric actuators can only be achieved in use, and improved in maintenance, for the use and maintenance conditions, the first thing to pay attention to is the perfect use and maintenance; secondly, the operator must be required to reach the corresponding technical level.
With the advancement of technology, high temperature, high pressure, cryogenic, high vacuum, strong corrosion, radioactive, highly toxic, flammable and explosive and other high parameter complex working conditions are increasing in industrial production, which puts forward higher and stricter requirements for the safety, functional reliability and service life of valves and actuators. To better ensure that electric actuators can work normally in complex environments such as extreme high or low temperature environments and strong radiation and strong magnetism is the future research and development direction of valve control devices. Therefore, the development of various types of valves adapted to high-parameter conditions has naturally become a common concern for the valve manufacturing industry, engineering design departments and users, and the main technical obstacles to solve the problem are often material.
The basic actuator is used to drive the valve to the fully open or fully closed position. The actuator used to control the valve can accurately make the valve go to any position. Although most actuators are used to switch valves, the design of today's actuators goes far beyond simple switching functions. They include position sensing devices, torque sensing devices, electrode protection devices, logic control devices, digital communication modules and PID control modules, all of which are installed in a compact housing.
Before the electric actuator is installed in the pipeline, the dirt and welding slag in the upper and lower pipelines connected with the valve must be removed. The gasket connected with the pipeline is not allowed to extend into the pipeline, and pay attention to whether the material of the gasket is suitable for the process medium. After installation, the actuator electric device should be opened and closed inspection, and check whether the actuator and its accessories work normally. When the internal pressure of the actuator electric device is charged, check whether there is leakage at the connection between the valve and the pipeline, and whether the flange nut should be tightened.
Electric actuator control function is quite rich, the use of computer control technology, so that the valve-type electric device intelligent, such as fault self-diagnosis, field configuration, status display, with a variety of control modes, with a variety of field bus interface, can match with a variety of automation equipment, to adapt to the control system completely digital communication needs. Using non-contact control components, with infrared remote control function, on-site debugging and operation without opening the valve type electric device, to ensure the protection performance.
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