Connecting device for rapidly hoisting instruments and meters and mounting method

The invention relates to the technical field of hoisting of instruments and meters, and discloses a connecting device for rapidly hoisting instruments and meters and an installation method.The connecting device comprises a rotary disc, a guide block, a rotary disc cover and an upper end cover, the guide block is movably arranged in the rotary disc, the rotary disc cover is movably arranged on the upper side of the rotary disc, and the interior of the rotary disc cover is movably connected with the guide block; the peripheral side of the rotary disc cover is fixedly connected with the inner wall of the upper end cover, the upper surface of the rotary disc is attached to the lower end face of the upper end cover, loss is small during repeated disassembly, a guide block extends out to be connected with a groove in the upper cover body, and meanwhile a steel ball on a wave screw in the guide block is locked with a U-shaped groove in the upper cover body. And the potential safety hazard of loosening and falling af