烟草柜式喂料机出柜自动调速系统的设计

Design of Automatic Discharge Speed Adjusting System for Silo Type Tobacco Feeder

为解决烟草柜式喂料机出柜控制过程中存在的操作人员劳动强度大、堵料、断料及设备启停频繁等问题,利用工业以太网和分布式可编程控制技术设计了烟草柜式喂料机出柜自动调速系统。系统主要由可编程控制器、变频器、电机和对射式光电开关等组成,信号通过对喂料机底带电机和提升带电机运行频率构建控制模型,循环检测限量管高、中、低料位光电开关的遮挡状态,并根据光电开关不同状态组合,分别对底带电机和提升带电机的运行频率进行调整。结果表明:系统实现了物料出柜的快速自动调速,人工调节频次由26次/批次减少为3次/批次,堵料情况由3.4次/批次减少为0.2次/批次,断料情况由2次/批次减少为0.2次/批次,设备启停次数由182次/批次降低为36次/批次。改进后系统为后序加工设备提供了稳定的物料流量,保证了卷烟产品的工艺品质。

To reduce labor intensity and avoid tobacco jam, tobacco flow interruption and frequent start/stop operation in manual operation of the discharge from the silo type tobacco feeder, an automatic discharge speed adjusting system was designed with industrial Ethernet and distributed programmable control technology. The system was mainly composed of a programmable logic controller, frequency converters, motors and photoelectric switches. By monitoring the status of photoelectric switches installed on the high, middle and low levels of metering tube, the running frequencies of bottom belt and elevating belt were adjusted. The results showed that the automatic system reduced manual adjusting from 26 to 3 times/batch, tobacco jam, tobacco flow interruption and start/stop of equipment decreased from 3.4 to 0.2, from 2 to 0.2, and from 182 to 36 times/batch, respectively. It ensured the consistent tobacco flow supplying to the downstream equipment.