Chain breakage detection and protection device for chain conveyor

The utility model provides a chain breakage detection and protection device for a chain conveyor, which aims at the speed change mechanism of a conveying chain and a transmission chain in the process of breaking the conveying chain and the transmission chain of the chain conveyor. A signal processor detects pulse signals sent by speed sensors installed on a tail shaft and a driving shaft to detect the rotating speed of a conveying chain and a transmission chain driving shaft so as to judge whether the conveying chain or the transmission chain has the precursor of being snapped or not, namely, the speed is slowed down to zero, and therefore the choice whether to disconnect a motor power source or not is made. Therefore, the purpose of protecting the conveying chain and the transmission chain is achieved. 本实用新型提供了一种链式输送机断链检测及保护装置，此装置针对链式输送机输送链及传动链拉断的过程中输送链与传动链的速度变化机理，通过信号处理器检测安装在尾轴与驱动轴上的速度传感器发出的脉冲信号来检测输送链与传动链带动轴的转速来判断输送链或传动链是否有被拉断的前兆，即速度变慢直至为零，从而做出是否断开电机电源的选择，以达到保护输送链及传动链的目的。