Automatic telescopic anti-blocking electric spark nozzle

The utility model is applicable to the technical field of electric welding, and provides an automatic telescopic anti-blocking electric spark nozzle which comprises a mounting seat, a sliding rod, a nozzle, an outer connector and an electromagnetic valve, pressure sliding cavities are formed in the side surface of the mounting seat, and the interiors of the two pressure sliding cavities are connected with the two ends of the sliding rod respectively; a power wheel is installed in the lower end of the sliding rod in an embedded mode, an outer connector is connected to the upper end face of the installation base, an electromagnetic valve is installed between the outer connector and the pressure sliding cavity, and a pressure valve is installed in the upper end of the installation base. According to the automatic telescopic anti-blocking electric spark spray head, the spray nozzle slides out of the receding groove to conduct welding operation in a sliding mode under pushing of pressure generated when argon is sp