Welding flux supply device of automatic submerged arc welding machine

The utility model discloses a welding flux supply device of an automatic submerged arc welding machine, which comprises a working table, two supporting plates are symmetrically arranged at the bottom of the working table, a vertical rod is arranged at the top of the working table, an annular plate is arranged at the top of the vertical rod, a material barrel is arranged at the top of the annular plate, and a connecting sleeve is arranged at the bottom of the material barrel. An output pipe is arranged on one side of the bottom of the connecting sleeve, a compressed air pipe is arranged on the other side of the bottom of the connecting sleeve, a first sliding groove is formed in one side of the workbench, a sliding plate is arranged on one side of the workbench, and a first sliding block matched with the first sliding groove is arranged on one side of the sliding plate; according to the device, welding flux in the output pipe is extruded through the compressed air pipe, meanwhile, the motor drives the lead scr