Paper machine drying cylinder with heat insulation and heat preservation structure

The utility model discloses a paper machine drying cylinder with a heat insulation and heat preservation structure, and belongs to the technical field of papermaking processing equipment. Comprising a drying cylinder body, two drying cylinder end covers and end cover shaft heads, the end cover shaft heads are arranged on the outer sides of the drying cylinder end covers, the two drying cylinder end covers are arranged at the two ends of the drying cylinder body, and heat insulation mechanisms are arranged on the inner sides of the drying cylinder end covers. The heat insulation mechanism comprises a first heat insulation assembly and a second heat insulation assembly which are arranged on the inner side of the drying cylinder end cover, the drying cylinder end cover, the drying cylinder body and the second heat insulation assembly are matched with one another, so that the concentration of gas in the heat insulation cavity is reduced, and gas molecules participating in heat transfer are reduced accordingly; th