Heat preservation structure of sintering furnace

The utility model discloses a heat preservation structure of a sintering furnace, which comprises a furnace body, a heat insulation cylinder is fixedly connected in the furnace body, a heating rod is arranged in the heat insulation cylinder, a ceramic heat preservation layer is arranged between the heat insulation cylinder and the furnace body, and a connecting cylinder is fixedly connected on the outer surface of the furnace body. A connecting shell is fixedly connected to the outer surface of the furnace body, the surface and the side face of the connecting shell are open, and a rotating assembly is arranged in the connecting shell. According to the utility model, through the arrangement of the rotating assembly and the furnace door, when the furnace door is opened and closed, the motor is used for driving the internal worm gear and worm for transmission, so that the rotating rod can drive the furnace door on one side of the connecting plate to be opened and closed when rotating, the furnace door does not n