Graded washing method and device for hydroelectric gravel aggregate

The invention provides a graded washing method and device for hydroelectric gravel aggregate, and relates to the field of hydroelectric gravel aggregate machining, the graded washing device comprises a multi-stage screening machine, and the multi-stage screening machine comprises a rack and a plurality of screens which are sequentially arranged on the rack at intervals in the vertical direction; the spraying system comprises a plurality of spraying pipes, a plurality of spraying heads, an electromagnetic valve and a water supply pipe, the spraying pipes are fixedly erected above the corresponding screens through the rack, and a plurality of spraying pipes are arranged above each screen; the regulation and control system is used for regulating and controlling the water outlet pressure and water quantity of the spray header according to the flushing condition of the aggregate and comprises an upper computer in electric control connection with the electromagnetic valve and a monitoring mechanism for monitoring t