Remote control system of walking excavator

The invention discloses a remote control system of a walking excavator, and belongs to the technical field of walking excavators. The remote control system is characterized in that an electronic controlled switching valve is serially connected into an original pilot control oil circuit and is used for opening or closing the hydraulic pilot oil circuit, then a proportional electromagnetic valve is connected between a hydraulic pilot control handle and pedal combination and a main control multi-way valve in parallel, relays (1) are respectively connected onto a circuit of a starting relay, a circuit of a flameout electromagnetic valve, a circuit of a loudspeaker and a circuit of a brake electromagnetic valve in parallel, and a remote control module is added to the remote control system and comprises a PLC (programmable logic controller), a transmitter and a receiver. An electronic control unit is introduced into the remote control system on the premise that merits of automatic operation and full-hydraulic pilot control flexible operation are kept, modification of a remote control function is facilitated, and the remote control system is simple in structure and low in cost. Besides, a group of relays (1) is connected onto the starting circuit, the flameout circuit, the loudspeaker circuit and the brake circuit in parallel respectively and are used for actuating remote control instructions to control basic electric functions, and the remote control functional module mainly comprises the transmitter, the receiver, the PLC and an accelerator actuator.