Mechanism for automatically adjusting size of round welding strip

The utility model relates to the technical field of photovoltaic round solder strips, in particular to a mechanism for automatically adjusting the size of a round solder strip, which comprises a base and the round solder strip, a main traction wheel and a wire pressing plate are rotatably connected outside the base, an automatic adjusting assembly is arranged outside the base, and the automatic adjusting assembly comprises a laser diameter measuring instrument arranged outside the base. A supporting table is arranged outside the base, an air pressure adjuster and an air knife generator are arranged outside the supporting table, the laser diameter measuring instrument controls the air pressure adjuster through a control system, a cooling air duct is arranged outside the base, and a protection assembly is arranged outside the cooling air duct and comprises a protection cover plate arranged outside the cooling air duct. When the device is used, the size of a high-speed running welding strip is monitored in real