Bolt connecting device for acoustic detection of bridge floor

The utility model is suitable for the technical field of bridge detection, and provides a sound wave detection bridge floor bolt connecting device which comprises a shell, an outer ring is connected to the middle of the inner side of the shell in a sliding mode, balls are clamped to the outer side of the outer ring, a hollow ring is fixedly connected to the inner side of the outer ring, and internal threads are arranged above the inner side of the hollow ring. A sound wave emitter is fixedly connected below the inner side of the hollow ring, a first fixing rod is fixedly connected to the right end of the shell, and a magnetic sheet is fixedly connected to the top end of the first fixing rod; through design cooperation, the device can be rapidly clamped at the bottom of the bolt, the top of the sound wave emitter on the inner side of the hollow ring is tightly attached to the bottom of the bolt, the sound wave receiver with the same outer side structure is arranged at the other end of the bridge, signals of th