Solenoid valve automatic adjustment circuit and its method

Abstract

The invention relates to an automatic electromagnetic valve adjusting circuit and a method thereof. The automatic electromagnetic valve adjusting circuit comprises a coil K1 connected with a fuse FU1. The fuse FU1 is connected with a coil Y and a thyristor VS1. After a rectifier diode VD2 is connected with a resistor R1 and a resistor R2, the rectifier diode VD2 is connected with a resistor R3, a resistor R4 and a voltage stabilizing diode VD3. An audion VT1 is connected with the resistor R3 and connected with a capacitor C1 in parallel. A control loop of an electromagnetic valve is connected with a base electrode of the audion VT1 through a resistor R5 via a contact S1 and connected with a potentiometer R7. The potentiometer R7 is connected with the resistor R5, a resistor R6 and a capacitor C2 in series. One path of the audion VT1 is connected with the resistor R4, and the other path of the audion VT1 is connected with a trigger circuit of the thyristor VS1. A contact S2 is connected with 220VAC current and an electromagnetic valve Y. A coil K2 is connected with a controller B2 and a power source null line, and the coil K2 is connected with a +24V power source. The control loop of the circuit is completely separated from the power source and control of the electromagnetic valve, the situation that in the electromagnetic valve operation process, interference is caused to the controller due to overcurrent or reverse signals is avoided, and damage of the electromagnetic valve due to the sudden power getting or power losing is prevented.

Description

technical field [0001] The invention belongs to the technical field of circuit design, and in particular relates to an electromagnetic valve automatic adjustment circuit and a method thereof. Background technique [0002] In recent decades, with the increasingly complex working conditions, the traditional solenoid valve control has been gradually replaced by the start solenoid valve. Pneumatic solenoid valves require uninterrupted air supply, and the compressed air will contain moisture, which affects the internal structure of the solenoid valve. There will also be damage. However, due to the complexity of the traditional solenoid valve control circuit, and the voltage required by the main circuit and the control circuit are very different, the main circuit coil generally requires AC 220V, and the control circuit and sensor circuit generally require DC 24V, and the circuit is controlled by the program. On and off are too sensitive. [0003] Especially in the detection of a...

AI Technical Summary

Problems solved by technology

[0002] In recent decades, with the continuous complexity of working conditions, the traditional solenoid valve control has been gradually replaced by the start solenoid valve. Pneumatic solenoid valves require uninterrupted air supply, and the compressed air will contain moisture, which affects the internal structure of the solenoid valve. there will be damage

However, due to the complexity of the traditional solenoid valve control circuit, and the voltage required by the main circuit and the control circuit are very different, the main circuit coil generally requires AC 220V, and the control circuit and sensor circuit generally require DC 24V, and the circuit is controlled by the program. On-off is too sensitive

[0003] Especially in the detection of airtight container filling and deflation, because the pressure detection sensor of the airtight container is particularly sensitive, if the pressure of the solenoid valve fluctuates up and down within a threshold, the control system will continuously output signals, and the solenoid valve will be constantly adjusted due to the control system The switching of the solenoid valve, the switching of the solenoid valve is particularly frequent near the critical value, causing damage to the solenoid valve, and there is a certain disturbance to the equipment control system, causing the system to malfunction and affecting the normal operation of the equipment

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