基于 PLC 的防爆全自动灌装设备控制系统设计

目的研究工业物料中易燃、易起泡的化工物料的灌装。方法设计一种自动卸盖、自动液面下灌装、自动上盖的全封闭式自动化防爆液体灌装机,在自动卸盖工位卸盖后向空桶内充惰性氮气,在灌装工位进行液面下自动灌装,始终保证灌装头在液面下灌装,灌装完成后在上盖工位将桶盖旋上,灌装和上盖工位设计在密闭间内,并安装抽风机将密闭间的挥发物抽走。结果在灌装前充满氮气,使灌装物料不易挥发,在全液面下灌装不易产生气泡沫,密闭间的设计保证不污染环境。结论该设备在某化工厂经实际应用,运行稳定可靠,适合于易燃工业物料的密闭灌装。

Design of Control System for Explosion-proof Automatic Filling Equipment Based on PLC

Objective To study the filling of chemical materials with flammable and foaming characteristics. Methods A fully enclosed explosion-proof automatic liquid filling equipment with automatic lid unloading, automatic filling under the surface and automatic covering was designed. Nitrogen gas was filled into the empty barrel after removing the lid in the unloading station, automatic filling under the surface was performed in the filling station, the filling head was ensured to be always under the surface, and then the lid was screwed in the capping station after the completion of filling. The filling and capping stations were designed in a closed room, and the volatile materials were pumped out of the room by an exhaust fan. Results Barrels were filled with nitrogen before filling, to prevent materials from evaporation, while filling under the surface prevented the occurrence of foams, and the closed room avoided pollution of the environment. Conclusion The filling equipment has been applied in a chemical enterprise, verified for stable and reliable operation performance, and is therefore suitable for the enclosed filling of flammable industrial materials.