Hot-dip Zinc Production Lines And Automatic Control System Design

At present, most of hot galvanizing product is manual operation, the productivity is low, quality can not be guaranteed, working environment is bad, labor intention is great. Thus, a auto hot galvanizing line and its auto control system is needed.Based on investigation and production demand, this article improved traditional hot galvanizing technics, research and designed hot galvanizing line and its autocontrol system; Analyse technics course and demand of hot galvanizing, designed hot galvanizing line; designed a distributed control system of hot galvanizing line with IBM-PC and SIEMENS S7-300 PLC; Use C8051F000 MCU and PID control arithmetic, use a steps inertia link and a delay link to approximate plate pool and zinc-plated boiler body, designed temperature control system, the simulation experimental result of the control system indicates that the precision of this control system has reached the designing requirement, the scheme is feasible. Developed Profibus interface, wrote communication software, realized communication between SIEMENSE S7-300 PLC and computer. Designed computer software based on WinCC configuration software, its good man-machine interface let operator know production process, diagnose fault, set up parameter of transducer, start and stop electromotor in central control room, realized autocontrol of hot galvanizing line.The precision and stability of computer control system is better than handwork, the system has prominent meanings in improving product efficiency and production quality, lowering costs. This system provides a feasible scheme for autocontrol of hot galvanizing line, has a reference value to bigger scale hot galvanizing product.