High pressure flow regulating valve stall protector

Abstract

The utility model relates to a high-pressure flow regulating valve blocking protector. It mainly solves the problem that the traditional blocking protector working in the way of detecting the blocking current cannot be applied to the high-pressure flow regulating valve. It is characterized in that: the locked-rotor protector also includes a start-up detection module capable of detecting the start-up signal of the solenoid valve, a rotation detection module capable of detecting the rotation of the handwheel of the solenoid valve, and a solenoid valve control module capable of controlling the shut-off of the solenoid valve; wherein, the start-up The detection module is composed of a current detection diode group and an optocoupler; the rotation detection module is composed of a handwheel installed on the high-pressure flow regulating valve, a magnet fixed on the handwheel, and a reed switch sensor fixed on the high-pressure flow regulating valve body Composition; the solenoid valve control module is composed of 3 relay modules independent of each other, and each relay module controls the on-off of a solenoid valve motor control line; the control signal port of the solenoid valve control module is connected to the solenoid valve control of the single-chip microcomputer signal output.

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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