Pitching hydraulic system of bucket-wheel stacker reclaimer

The utility model discloses a pitching hydraulic system of a bucket-wheel stacker reclaimer, which particularly relates to the field of pitching hydraulic pressure and comprises a hydraulic cylinder,a guide device and a heat dissipation device are arranged on the outer side of the hydraulic cylinder, and the heat dissipation device is located on the inner side of the guide device. The guiding device comprises a first connecting plate, a second connecting plate, a connecting column, a guide rail, a connecting rod, a blocking cylinder and a first connector. The heat dissipation device comprisesa heat dissipation cylinder and a second connector, a first cooling cavity and a second cooling cavity are formed in the heat dissipation cylinder, a clamping piece is arranged on the inner side of the heat dissipation cylinder, a heat conduction hole is formed in the clamping piece, the connecting column is fixedly arranged between the first connecting plate and the second connecting plate, andthe connecting column is an