Municipal well lid convenient to install

The municipal well lid convenient to install comprises an annular installation frame and a circular cover plate, the installation frame comprises a lower frame and an upper frame, the cover plate comprises an upper plate matched with an inner cavity of the upper frame and a lower plate arranged at the lower end of the upper plate and matched with an inner cavity of the lower frame, and a water passing opening is formed in the outer portion of the lower frame and surrounds the lower frame. An annular groove rail is arranged at the upper end of the lower frame, a plurality of telescopic sliding blocks are arranged at the bottom of the upper plate, a limiting groove is formed in the groove rail, a locking device is arranged on the side wall of an inner cavity of the upper frame, an unlocking mechanism is arranged in the upper plate, and a hidden movable cover plate is further arranged at the upper end of the upper plate. And a folding control handle capable of controlling the control releasing mechanism is arran