Locked-rotor protector of high pressure flow regulating valve

Abstract

Provided is a locked-rotor protector of a high pressure flow regulating valve. The problem that a traditional locked-rotor protector working by the adoption of a locked-rotor current detection mode cannot be applied to the high pressure flow regulating valve is mainly solved. The locked-rotor protector of the high pressure flow regulating valve is characterized in that the locked-rotor protector further comprises a starting detection module for detecting a starting signal of an electromagnetic valve, a rotation detection module for detecting rotation of an electromagnetic valve hand wheel and an electromagnetic valve control module for controlling the electromagnetic valve to cut off. The starting detection module is composed of a galvanometer diode set and an optocoupler. The rotation detection module is composed of the hand wheel installed on the high pressure flow regulating valve, a magnet fixed to the hand wheel and a reed switch sensor fixed to a valve body of the high pressure flow regulating valve. The electromagnetic valve control module is composed of three mutually independent relay modules. Each relay module controls on-off of one electromagnetic valve motor control line. A control signal port of the electromagnetic valve control module is connected to the electromagnetic valve control signal output end of a single-chip microcomputer.

Description

technical field [0001] The invention relates to a protection device for a high-pressure flowmeter used in the field of ternary compound displacement fluid to displace crude oil. Background technique [0002] Stall is the situation that affects the rotation of the motor caused by man-made or due to the limited driving capacity of the motor. When the motor rotates, the rotating magnetic field formed by the stator windings drives the rotor to rotate, and the magnetic field generated by the induced current in the rotor also induces a counter electromotive force in the stator windings, which is what we call inductive reactance, which prevents the motor from increasing the stator current. . If the motor is blocked, the above counter electromotive force disappears, and the motor is like an inductive element connected to the power supply, with only its own resistance and inductance, and the natural current will greatly increase. According to the size of the motor capacity and diff...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems mentioned in the background technology, the present invention provides a high-pressure flow regulating valve stall protector. This kind of high-pressure flow regulating valve stall protector cleverly avoids the problem of directly using current to detect motor stall. The problem of misjudgment is caused, and the action state of the high-pressure flow regulating valve is used to judge whether there is scaling and whether the motor is blocked

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