Water-saving control method of plating line washing solenoid valve

The invention discloses a water-saving control method of a plating line washing solenoid valve. The water-saving control method comprises the following steps of (S1) dividing an induction area for conducting plate induction in an overflow washing tank, and installing at least one solenoid valve in the overflow washing tank; (S2) installing at least one conducting plate induction device in the induction area; and (S3) determining whether a conducting plate enters the induction area in real time by each conducting plate induction device, executing the step (S4) if the conducting plate enters theinduction area, otherwise repeating the step (S3). According to the water-saving control method of the plating line washing solenoid valve, the solenoid valve using a PLC (Programmable Logic Controller) control system is additionally installed in the overflow washing tank, and the PLC control system is connected with the conducting plate induction device. In addition, only when a conducting plateis induced by the conduct