A method for anti-jamming of a partially rotary fully enclosed electric transmission device

Abstract

The invention belongs to the technical field of mounting of electric transmission devices for valves and particularly relates to a stagnation-preventing method for a partial-rotation wholly-sealed electric transmission device. The stagnation-preventing method includes the following steps that firstly, sensors are arranged, wherein the position sensors are arranged on the periphery of a valve clack of a rotation valve, and the position sensors can detect the rotation position of the valve clack; secondly, closing control of the valve is conducted, wherein when the valve is closed, a frequency converter is controlled to sequentially output the valve closing frequencies f1, f2, f3 and f4 towards the electric transmission device; thirdly, opening control of the valve is conducted, wherein when the valve is opened, the frequency converter is controlled to sequentially output the valve opening frequencies f5, f6, f7 and f8 towards the electric transmission device. The stagnation-preventing method solves the technical problem of valve stagnation caused by the over torque of an existing rotation closed electric transmission device, due to the fact that the position sensors and the frequency converter are arranged, the rotating speed of a motor is changed according to practical needs, the stagnation phenomenon is avoided, and therefore the action reliability of the valve is improved.

Description

technical field [0001] The invention belongs to the technical field of electric transmission devices for valves, and in particular relates to an anti-blocking method for partially rotary and fully enclosed electric transmission devices. Background technique [0002] Existing part-rotary valves mainly control the forward rotation and reverse rotation of the valve electrical equipment through the position sensor to realize the switch. The switching torque of the valve denso is determined by the power supply voltage, and the torque output by the denso is a constant value during the switching process. When the valve is fully closed or fully opened, according to the signal of the position sensor, the power supply of the valve electrical equipment is cut off, and the valve action stops. [0003] After the valve moves many times, the resistance torque of the disc will become smaller. When the valve is closed, there may be a large torque output by the motor, resulting in the valve...

AI Technical Summary

Problems solved by technology

When the valve is closed, there may be a large torque output by the motor, which will cause the valve to be stuck and unable to operate continuously and reliably.