Post-heating device for preheating end part of shell ring

The utility model relates to the technical field of welding heat treatment devices, and discloses a shell ring end preheating and post-heating device which comprises a flaming mechanism, a lifting mechanism, a supporting disc assembly and a rotating base. The supporting disc assembly is connected with the rotating base through a rotating rod, the fire spraying mechanism comprises a fire spraying disc and a plurality of fire spraying nozzles, the fire spraying nozzles are evenly and annularly distributed around the fire spraying disc, and the lifting mechanism is used for adjusting the height of the fire spraying mechanism. Therefore, the welding quality can be better improved from preheating at the beginning of welding to post-heating at the end of welding, the fire spraying mechanism is adjusted and positioned through the lifting mechanism, positioning is completed by adjusting the height of the fire spraying mechanism and the height of the preheating position of the shell ring, and the welding quality is im