1420mm酸轧产线点冷系统工作原理及故障分析  

Working principle and fault analysis of point cooling system in1 420 mm cold rolling-pickling production line

作　　者：李文山 方圆 张春杰 桑圣峰 王凯 LI Wenshan;FANG Yuan;ZHANG Chunjie;SANG Shengfeng;WANG Kai(Tinplate Business Unit,Shougang Jingtang Steel United Co.,Ltd.,Tangshan 063200,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司镀锡板事业部,河北唐山063200

出　　处：《重型机械》2024年第3期95-100,共6页Heavy Machinery

摘　　要：某钢厂1 420 mm酸轧产线点冷系统点喷阀内部窜液和芯卡死两种故障直接影响带钢板型的控制能力。对于点喷阀内部窜液问题,分析点喷阀内部结构及窜液路径,通过自主研制的点喷阀试验台对窜液情况进行验证,得出阀芯密封损坏是造成窜液的根本原因,对于窜液发生初期应通过专用设备打压方式进行检测。对于点喷阀阀芯卡阻问题,建立阀芯开闭条件不等式,并在实验室测得弹簧刚度、摩擦力等关键参数,通过不等式得出压缩空气应调整在上限,同时降低阀芯动作时的摩擦阻力的措施,如通过在喷射阀台主管路处安装Y型过滤器以及设计点喷阀“自清洗”功能等措施,解决了点喷阀阀芯卡死的问题。Two faults,internal fluid leakage and core jamming,in point cooling system of 1420 mm cold rolling-pickling production line at a steel plant,directly affect the control capability of strip steel plate shape.For the problem of internal liquid leakage in the point spray valve,the internal structure and liquid leakage path of the point spray valve were analyzed.The liquid leakage situation was verified through a self-developed point spray valve test bench,and it was found that the damage to the valve core seal was the fundamental cause of the liquid leakage.For the initial occurrence of liquid leakage,special equipment should be used for pressure testing.For valve core jamming in point spray valves,an inequality for valve core opening and closing conditions was established,and key parameters such as spring stiffness and friction force were measured in the laboratory.Through the inequality,it was found that compressed air should be adjusted at the upper limit,and measures were taken to reduce the frictional resistance during valve core action,such as installing a Y-shaped filter at the main pipeline of the injection valve station and designing a“self-cleaning”function for the point spray valve,to solve the problem of valve core jamming.

关 键 词：点冷系统 点喷阀 混合腔 

分 类 号：TG333[金属学及工艺—金属压力加工]