KZL4-13型锅炉的炉排移动是靠油泵电机所产生的油压来带动的。在实际使用中由于各种原因(如煤块或炉渣的卡死)造成炉排的突然卡阻,轻则损坏电机或拉断活塞连杆,重则单面拉断炉排。我厂仅1994年就有近十次因为这类故障造成锅炉停炉、全厂停产。油泵电机M的线路如图1所示,当油压骤升时,其控制线路不能起到应有的保护作用。经分析,只要在其控制回路中加装一只继电器及 KZL4-13-type boiler grate movement is driven by the pump motor oil pressure to bring. In actual use due to various reasons (such as coal block or slag stuck) resulting in sudden blockage of the grate, ranging from damage to the motor or pull off the piston rod, heavy single-sided broken grate. I only plant in 1994, nearly ten times because of such failures caused by boiler shutdown, the whole plant production. Pump motor M line shown in Figure 1, when the hydraulic surge, the control line can not play its due role. After analysis, as long as its control circuit to install a relay and