Raw material upper limit alarming device of belt conveyor hopper

The utility model relates to a raw material upper limit alarming device of a belt conveyor hopper, which comprises a bottom plate, an electric motor, a mechanical probe, a mechanical connecting hand, a controller and a dust cover. The alarming device is characterized in that a positioning plate is arranged on the bottom plate, the electric motor is installed on the positioning plate, at least two proximity switches are arranged on the positioning plate, the electric motor is connected with the mechanical probe through the mechanical connecting hand; a round disc is arranged on the mechanical hand, iron sheets are arranged on the round disc and match with the proximity switches, and the electric motor is electrically connected with the controller. The alarming device is installed on the outer wall of the belt conveyor hopper through a fixing support, the mechanical probe penetrates into the hopper, and the dynamic lower edge of the mechanical probe and the upper limit of the material level are positioned in th