Cooling device of high-frequency welded pipe welding machine

The utility model relates to the technical field of welding machine cooling, and provides a cooling device of a high-frequency welded pipe welding machine, which comprises a cooling machine, a cold air cover is arranged at the outer end of the cooling machine, an extension assembly is arranged at the outer end of the cold air cover, and the extension assembly comprises a positioning rod fixed at the outer end of the cold air cover and an extension cover movably arranged at the outer end of the cold air cover. A threaded rod is arranged at the inner end of the positioning rod, a threaded ring is arranged at the outer end of the threaded rod, a positioning ring is arranged at the outer end of the threaded ring, a mounting and sleeving assembly is arranged at the lower end of the cold air cover, and the mounting and sleeving assembly comprises a mounting plate and a sliding groove and is used for being connected to the outer end of a power part of the welding machine in a sleeving mode. The positioning rod is fi