Belt conveyor protection device

The utility model discloses a belt conveyor protection device, and relates to the field of belt conveyors for mineral transportation. The belt conveyor protection device can improve the alarm parking precision. The belt conveyor protection device comprises a control system and a hollow cylindrical stock bin. A mercury level indicator is arranged inside the stock bin and electrically connected with the control system. A feeding inlet is formed in the side wall of the stock bin. A discharging outlet is formed in the bottom face of the stock bin. The belt conveyor protection device further comprises a protective cover. The protective cover covers the mercury level indicator. A gap between the protective sleeve and the mercury level indicator is filled with a buffer. The outgoing line port of the mercury level indicator is sealed secondarily by a silicone adhesive. According to the belt conveyor protection device, the safety of the mercury level indicator is improved, and the installation position the mercury level indicator is designed to be adjustable, so that the purpose of improving the alarm parking precision of the mercury level indicator is achieved.