Snap ring guide mechanism of vacuum positive pressure furnace

The utility model relates to a vacuum positive pressure furnace snap ring guide mechanism, and relates to the technical field of positive pressure furnaces, the vacuum positive pressure furnace snap ring guide mechanism comprises a furnace body, a furnace door hinged on the furnace body, a furnace body flange fixed on the furnace body and a furnace door flange fixed on the furnace door, a pressing clamping ring is arranged on the furnace door flange, a positioning block is fixed to the inner wall of the pressing clamping ring, a positioning opening is formed in the furnace door flange, a roller is rotationally connected to the pressing clamping ring, and the roller can roll on the furnace body flange. Part of sliding friction between the pressing clamping ring and the furnace body flange is converted into rolling friction through the rolling wheels, so that friction force between the pressing clamping ring and the furnace body flange is reduced, acting force needed by a user for rotating the pressing clamping