Alarm device after failure of longitudinal shearing loop pit linkage control system

The utility model relates to the field of longitudinal shearing of copper and copper alloy strips, in particular to an alarm device used after failure of a longitudinal shearing loop pit linkage control device. The technical problem that in the current copper strip cutting process, due to the fact that the speed is unstable, the copper strip is out of control and falls to the loop pit bottom, and the material surface is damaged is solved. The utility model discloses an alarm device used after a longitudinal shearing loop pit linkage control system fails. The alarm device comprises a loop pit used for buffering a longitudinally-sheared copper strip and an operation table located on the ground. The front side wall, the rear side wall and the pit bottom of the loop pit are each provided with a set of out-of-control alarm devices, the out-of-control alarm devices located on the side walls adopt a pair of infrared alarms, and the out-of-control alarm devices located at the pit bottom adopt infrared optoelectronic