Yangzhou Huatong Electric Valve Manufacturing Co

Detailed description of stroke counter丨torque switch丨opening indicator:
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. The input gear is driven by the counter gear, and after deceleration, the indicator plate rotates simultaneously with the opening and closing process of the valve to indicate the valve The switch value, the potentiometer shaft and the indicating plate rotate synchronously for remote transmission opening indication. The number of turns can be changed by moving the turns adjustment gear. The opening indicating mechanism is equipped with a micro switch and a cam. When the electric device is running, the rotating cam periodically causes the micro switch to operate. The frequency is that the output shaft rotates once and operates once or twice, which can be used for flash signals. .
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. Valve electric device stroke counter, stroke switch, limit switch.
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. The stroke control mechanism adopts the principle of decimal counter, also known as counter, with high control accuracy. The working principle is: a pair of large and small bevel gears in the reduction box drive the intermediate pinion, and then drive the stroke control mechanism to work. If the stroke controller has been adjusted according to the valve switch position, when the controller rotates with the output shaft to the pre-adjusted position or number of turns, the cam will rotate, forcing the micro switch to act, cutting off the power to the motor, and the motor stops, thus Realize the control of the stroke or number of turns of the electric device.
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. Adopting the principle of decimal counter, the control accuracy is high. It is a common component for the whole series, its structure is shown in the figure. Its working principle is: a pair of large and small bevel gears in the reduction box drive the driving pinion, and then drive the stroke controller to work. If the stroke controller has been adjusted according to the valve opening and closing positions, when the controller rotates with the output shaft to the pre-adjusted position (number of turns), the cam will rotate, forcing the micro switch to act, cutting off the motor power, and causing the The motor stops, thereby controlling the stroke (number of revolutions) of the electric actuator.
. When the output shaft is subjected to a certain torque, the worm not only rotates but also produces axial displacement, driving the crankshaft, and the crankshaft directly (or through a collision block) drives the bracket to produce angular displacement. When the torque on the output shaft increases to the set torque, the displacement generated by the bracket causes the micro switch to operate, thus cutting off the power supply and the motor stops. In this way, the output torque of the electric device is controlled, thereby achieving the purpose of protecting the electric valve.