保定市托辊厂

Folding buffer roller protection

(1)缓冲托辊温度保护

(1) buffering roller temperature protection

带式输送机滚筒与皮带摩擦使其温度超限时，紧贴滚筒安装的检测装置发出超温信号，接收机收到信号后，经3s 延时，使执行部分动作，切断电动机供电，输送机自动停转，起到温度保护作用。

When the roller of belt conveyor rubs against the belt to make its temperature exceed the limit, the detection device installed close to the drum sends out the overtemperature signal. After receiving the signal, the receiver delays for 3 seconds, so that part of the action is executed, the motor power supply is cut off, the conveyor automatically stops running, playing a role of temperature protection.

(2)托辊组速度保护

(2) speed protection of roller group

若输送机发生故障，如电动机烧毁、机械传动部分损坏、皮带或链子拉断、皮带打滑等，安装在输送机被动机件上的事故传感器SG中的磁控开关不能闭合或不能按正常速度闭合这时控制系统将按反时限特性经一定延时后，速度保护电路起作用，使执行部分动作，切断电动机供电，以避免事故扩大。

If the conveyor fails, such as motor burnout, mechanical transmission part damage, belt or chain pull-out, belt skid, etc., the magnetic control switch installed in the accident sensor SG on the conveyor passive parts can not beuxingmoju.89ix.commenf.89ix.com liuhuaji.75ix.com liqingbeng.75ix.com guolvji.75ix.com lvguan.75ix.com  closed or closed at normal speed, then the control system will delay according to the inverse time characteristics, speed protection. The protective circuit acts as a part of the operation to cut off the power supply of the motor so as to avoid the accident enlargement.

(3)缓冲托辊煤仓煤位保护

(3) coal level protection of buffering roller coal bunker.

煤仓中设高低两个煤位电极，煤仓由于无空车不能放煤时，煤位将逐步升高，当煤位上升到高位电极时，煤位保护动作，从首台皮带输送机开始，各台输送机因机尾堆煤依次停车。

When the coal level rises to the high electrode, the coal level protection action starts from the first belt conveyor, and each conveyor stops sequentially due to the pile of tail coal.