Automatic heat insulation carriage cover of asphalt concrete dumper

The invention discloses an automatic heat insulation carriage cover of an asphalt concrete dumper. The automatic heat insulation carriage cover is mainly used for the asphalt concrete dumper, can automatically cover a carriage, is good in heat insulation effect and mainly comprises a hydraulic system, a vertical frame, a supporting frame, a triangular support, a shaft A, an ejector rod and a carriage cover. The main working principle of the automatic heat insulation carriage cover includes that a piston of the hydraulic system ejects the carriage cover upwards through a shaft B in loading of the dumper, the carriage cover rotates around the shaft A by one angle and is opened, the piston of the hydraulic system retracts, the carriage cover is closed, the carriage rotates anticlockwise by one angle under jacking of the piston of the unloading hydraulic system in unloading of the dumper, rollers on the carriage roll along slots of the carriage cover and drive the carriage cover to rotate clockwise around the shaft A by one angle to open the carriage cover, after unloading, the piston of the earth unloading hydraulic system retracts, the carriage is reset, the rollers on the carriage are driven to roll reversely along the slots of the carriage cover, and the carriage cover is closed.