External thermal insulation device for rotary kiln thermal belt

The invention discloses an external thermal insulation device for a rotary kiln thermal belt. The device comprises lateral thermal insulation walls, two end sealing doors, a triangular rainproof and snowproof thermal insulation sealing ceiling, a fixed support, a bottom thermal insulation wall and a supporting base, wherein the fixed support is of a cuboid structure, the end sealing doors are installed at the two ends of the fixed support, a round hole in a shape matched with the shape of a rotary kiln is formed in each sealing door, the lateral thermal insulation walls are arranged on the two lateral sides of the fixed support, a viewing port made of high-temperature-resistant glass is installed on one lateral thermal insulation wall, the triangular rainproof and snowproof thermal insulation sealing ceiling is arranged on the upper portion of the fixed support, the bottom thermal insulation wall is arranged on the lower portion of the fixed support, and the supporting base is arranged below the bottom thermal insulation wall. The device has the advantages of being simple in structure, convenient to operate, good in thermal insulation effect and remarkable in wind resistance, rain resistance, snow resistance and frost resistance. The device is fixed on a kiln base, can be dismantled when a kiln is overhauled, and is convenient to overhaul and maintain. The device also has the advantages of being long in service life, low in operation and maintenance workload, and low in operation cost.