Air cooling device for heat treatment of heavy cylindrical forgings

The utility model relates to a heavy cylindrical forge piece heat treatment air cooling device which comprises a steel frame, a supporting roller and a driving mechanism, the steel frame is provided with a fan, the supporting roller comprises a center shaft, a supporting sleeve and a supporting rib plate, a sealing plate is arranged between the end of the center shaft and the end of the supporting sleeve, and a ventilation cavity is defined by the sealing plate, the supporting sleeve, the center shaft and the supporting rib plate. The central shaft is a hollow shaft, two ends of the central shaft are rotatably connected with the shaft seats on the steel frame, one end of the central shaft is closed, the other end of the central shaft is provided with a rotating joint, the rotating joint is communicated with an air outlet of the fan, and the central shaft is provided with an air inlet hole penetrating through the pipe wall of the central shaft. The air inlet communicates with the interior of the center shaft a