Heat preservation structure based on air inlet pipe of curing chamber

The utility model provides a heat preservation structure based on an air inlet pipe of a curing chamber, which relates to the technical field of plastic film processing, and comprises a pipe inner layer, a pipe outer layer and a pipe inner layer, the pipe middle layer is arranged outside the pipe inner layer in a sleeving manner; the two end covers are arranged at the two ends of the pipe middle layer respectively and form a water storage cavity with the pipe inner layer and the pipe middle layer, the water storage cavity is used for containing water, and the temperature of the water is not lower than that of air in the pipe inner layer; the heat preservation layer is arranged on the outer surface of the pipe middle layer so as to preserve heat of water in the water storage cavity; the pipe outer layer is arranged on the outer surface of the heat preservation layer; in order to avoid the problem that heat loss is large when hot air passes through the air inlet pipe, hot water in the water storage cavity can c