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Partial Rotary Valve Electric Actuator Industrial Automation Management
Jun 06, 2017

Water, steam or oil and other fluids and industrial development are closely linked, and the application of fluid in the industrial network system can not be separated from the pipe network must have a valve. With the DCS (Distributed Control System) control system development, to achieve the pipe network system of industrial automation management, it is inseparable from the electric valve in the pipe network system implementation agencies. The control of the valve from a simple switch control into the opening control and flow and other relationship control. The valve is not only a purely controlled object, and evolved into an important information source for the entire process system, the valve system for the process parameters and fault diagnosis information. This poses a higher demand for the intelligence of the valve actuator. Multi-turn structure so that the actuator stroke can be theoretically infinite, in other conditions permit, can be set with any size valve, no mechanical limit and torque switch, no mechanical wear, the use of infrared remote control non-contact debugging technology Open the electronic controller cover for easy and quick setup.

To achieve the pipe network system of industrial automation management, can not be separated from the automatic valve in the pipe network system implementation agencies. In some applications, the control of the valve is not only a simple switch control, but also involves the opening control and flow and other relationship control, which the valve Partial Rotary Valve Electric Actuator controller intelligence put forward higher requirements.

If it is in the toxic, explosive or flammable media production site, artificial field control is extremely dangerous. Long-range centralized control is more necessary in such applications.

Based on the above background considerations, the program to achieve these ideas, the design of a valve on the installation of intelligent valve control device, which greatly improved the security.

Intelligent valve drive device development

Actuators in the modern production process automation plays a very important role, often referred to as the realization of the production process automation "hand and foot." The Partial Rotary Valve Electric Actuator is powered by an electric motor, which receives the standard signal (analog or digital) from the regulator and automatically changes the operating variable by changing the signal into a corresponding mechanical displacement (corner, straight or multi-turn) , Damper, baffle opening, etc.), in order to achieve the parameters (temperature, pressure, flow, liquid level, etc.) for the purpose of automatic adjustment, so that the production process according to the scheduled requirements. So the Partial Rotary Valve Electric Actuator on the automatic adjustment of the safe operation of the system, reliability and quality of the advantages and disadvantages have a great impact.

Structure and Characteristics of Intelligent Actuator for Intelligent Valve

The structure of an Partial Rotary Valve Electric Actuator

It is mainly composed of servo control system and the implementation of two parts, accept from the adjustment unit, the transmitter unit or manual operator output of a unified standard current signal, convert it into the corresponding mechanical displacement output. The entire range of intelligent valve drives is a modular design.

It consists mainly of the following structure:

① motor control system

The use of time technology servo controller control AC asynchronous electric

② transmission mechanism

Worm gear reduction mechanism to reduce the speed of the motor to the required output speed, the motor does not turn when the transmission mechanism self-locking.

③ control unit

Use time technology QMCL (fast motion control language) to program, control the operation of the motor

④ valve connection mechanism

The valve coupling mechanism has a variety of types of output devices to choose from to install the actuators on different valves. The dimensions and dimensions are in accordance with ISO 5210 or DIN 3338. The DIN 3338 standard is also available as required to provide an output drive

⑤ manual mechanism

In the manual mode, the trip switch and the emergency mechanism can be set. When the motor is in the stopped state, pull the hand / automatic switch handle to disengage the motor from the transmission mechanism and connect it with the transmission mechanism manually.

Because the Partial Rotary Valve Electric Actuator is designed with electric priority, once the motor is started, the manual mechanism should be disengaged from the drive mechanism, and the motor drives the drive mechanism, and the handwheel should not rotate during the electric operation.

Characteristics of Partial Rotary Valve Electric Actuators

Relative to the pneumatic, hydraulic actuators, the Partial Rotary Valve Electric Actuator has three main advantages:

(1) no special gas and air purification equipment, even if the power loss, but also to maintain the original execution position;

(2) can be long-distance transmission of signals, cable laying than the trachea and liquid pipe laying much more convenient, and easy to check the line;

(3) easy to connect with the computer simple and more adaptable to the use of electronic information technology.