Detection device for preventing sudden drop of gate-type bucket wheel machine

The utility model provides a gate type bucket wheel machine anti-sudden drop detection device, which comprises a steel cable pulley support and an encoder angle return mechanism located on one side of the steel cable pulley support, the steel cable pulley support is composed of a first supporting plate and a second supporting plate, the first supporting plate and the second supporting plate are respectively provided with a first through hole in a penetrating mode, and the encoder angle return mechanism is located on the other side of the steel cable pulley support. A first through hole is formed in the first supporting plate, a bearing support is arranged in the first through hole, a rotating shaft is arranged between the first supporting plate and the second supporting plate, a pulley movable wheel is connected to the rotating shaft in a penetrating mode, and the two ends of the rotating shaft are connected with the bearing support; the output end of the encoder body is connected with the rotating shaft thro