Gateway closing device

The invention discloses a gateway closing device which comprises a frame body and a revolving door device connected to the frame body in a pivot mode. The revolving door device comprises a shell, a driving motor contained in the shell and blocking units which are installed at the upper end and lower end of the driving motor; one end of the driving motor extends outwards to be provided with a first rotation shaft, the bottom of the first rotation shaft is fixedly connected with a first connecting block, the upper portion of the first connecting block is provided with a cylindrical trapezoid rotation mechanism, and the first rotation shaft is served as a center shaft of the cylindrical trapezoid rotation mechanism; the upper portion of the rotation mechanism is fixedly connected with a top cap, and one side, deviating from the cylindrical trapezoid rotation mechanism, of the center of the top cap extends outwards to be provided with a second rotation shaft; the second rotation shaft is of a trapezoidal structure, and the upper portion of the second rotation shaft is provided with a code disc. The gateway closing device further comprises a lock-up mechanism, the lock-up mechanism comprises a lock-up plate which is located on the bottom of the second rotation shaft and is with a gear-shaped structure and a tooth-shaped structure which is matched with the lock-up plate to play a role in lock-up. The gateway closing device has the advantages that the response is sensitive, the functions are stable, safety is achieved, and the range of a self-locking control angle is wider.