Shore power transmission line floater

The invention relates to the field of shore power transmission, in particular to a shore power transmission line floater device, which is a shore power transmission system consisting of a certain number of floater devices and a device for safely transmitting shore power to ship engineering equipment. The device comprises an air valve connected to the lower end of a floater, a movable plate frame switch button, a balance mounting column, a movable plate frame, a tightness adjusting button, a tightness adjusting device, a pre-tightening device, a detachable locking movable switch and an auxiliary support frame. The cable is fixed by adjusting the up-and-down floating of the tightness adjusting device through a detachable locking movable switch and a tightness adjusting button; the mechanism uses a rotatable movable plate frame, so that the mechanism is compact; the balance effect comes the solid line through the balanced mounting post that sets up at both ends.