Due to the needs of the market and the development of electric valves, the intelligent process of electric valves has become inevitable. At the same time, the rapid development of mechatronics, microelectronics technology, and computer technology provides technical guarantees for the intelligent development of electric valves. The smart valve now mentioned mainly has the following characteristics:
1. Digitalization of electric valve communication.
The intelligent valve electric actuator is connected with the upper computer by electric carrier. The addressable digital signal sent by the explosion-proof solenoid valve of the upper computer is transmitted to the electric actuator via the power line. The electric actuator controller controls the electric actuator according to the received signal. Perform corresponding control to make the working mode of the electric valve more flexible.
2. Computerized valve control program.
Under normal circumstances, the actuator drives the valve according to the control signal sent by the microprocessor of the control system, thereby adjusting the opening of the valve to adjust the flow and pressure. For example, for electric actuators, servo amplifiers with intelligent control functions are added to increase the set value control functions; the use of intelligent controllers can change the previous mechanical torque control switch to adjust the action value, and the sealing shell needs to be disassembled and wired through the solenoid valve. Adjust the spring to adjust the torque value.
Three, electric valve fault diagnosis and intelligent processing.
The intelligent electric control valve should have perfect self-diagnosis function. The additional sensor is installed on the valve electric actuator, which can play a role in the fault diagnosis of the electric valve. According to needs, various detection functions can be set in the circuit. For example, the intelligent electric valve can recognize negative torque. When the control command is found to be inconsistent with the execution, it can immediately control the contactor to reverse the phase sequence to realize the reverse connection of the phase sequence. , Realize the phase sequence synchronization; the intelligent electric valve can also detect the three-phase current, once it finds that the current is cut off, it immediately stops the valve motor.