Thermal insulation device of aluminum alloy external refining equipment

The utility model relates to a heat preservation device for aluminum alloy external refining equipment, which belongs to the field of heat preservation devices and comprises a front heat preservation plate, a rear heat preservation plate, side heat preservation plates and connecting rods. The front heat preservation plate and the rear heat preservation plate are arranged in parallel and fixedly connected to the aluminum alloy external refining equipment. The side heat preservation plates are arranged on the two sides of the front heat preservation plate and the two sides of the rear heat preservation plate respectively, a rectangular structure is defined by the front heat preservation plate, the rear heat preservation plate and the side heat preservation plates, and one end of each side heat preservation plate is hinged to the rear heat preservation plate. Supporting rods are arranged on the two sides, close to the side heat preservation plates, of the rear heat preservation plate correspondingly, and the two