Digging device lifting system for environment-friendly cutter suction dredger

A digging device lifting system for an environment-friendly cutter suction dredger comprises a hydraulic winch, an A-shaped frame, a digging device, an upper pulley set, a lower pulley set, a bridge steel wire rope, an A-shaped frame topping lift, an A-shaped frame trunnion board and an A-shaped frame trunnion. The digging device lifting system is characterized in that the hydraulic winch comprises a reduction gearbox, a clutch device, a braking speed limiting device and a manual device, a tertiary shaft, a secondary shaft, a primary shaft and a spindle are arranged in the reduction gearbox from top to bottom, one side of the reduction gearbox is connected with a hydraulic motor, the other side of the reduction gearbox is connected with a coiling block of the steel wire rope, the hydraulic motor drives the coiling block to rotate through the reduction gearbox and is connected with the primary shaft, a primary shaft first gear and a primary shaft second gear are arranged on the first gear, the clutch device is arranged on the secondary shaft on the reduction gearbox and comprises a male friction plate and a female friction plate, and the male friction plate and the primary shaft are connected. The digging device lifting system is high in production efficiency, the digging device is wide in soil property application range, and dredging quality is high.