运煤车防冻液自动喷洒电液控制系统工作原理分析

Analysis on Working Principle of Automatic Spray Electro-Hydraulic Control System of Antifreeze of Coal Train

为解决冬季精煤运输过程发生冻结、精煤粘结在车厢内壁上造成卸煤困难的问题,需在装车前将防冻液均匀喷洒在列车厢体的内壁及底部,并在精煤进入缓冲仓之际将防冻液喷洒在煤流中,为节约防冻液,要求在两节车厢的间隔处停止喷洒。根据实际工作需求,采用机电液控制方式,由液压系统提供动力源,液压缸驱动大臂控制喷头的升降和回转,采用自动和人工两种控制方式,通过采集车速和输送带煤流重量等状态信息,实现车厢喷洒与缓冲仓煤流喷洒的自动控制,解决了两车厢之间因不停止喷洒而对环境造成污染的问题,节省了人力和大量防冻液,设计和元件选型中,充分考虑了使用环境寒冷、粉尘、湿气大等恶劣条件,使系统可靠工作。

In order to solve troubles during the transportation of fine coals in winter such as freeze and fine coals sticked on the internal walls of compartments, it is necessary to spray antifreeze evenly on the internal wall and bottom of the compartments before coals are loaded on the train and also spray it into fine coal flow while fine coals enter surge bins. In order to save antifreeze, it is required to stop spraying it in the interval between two compartments. In accordance with the accurate working requirement, electro-hydraulic control shall be adopted, hydraulic system shall provide power source, and the lift and rotary of the spray nozzle shall be controlled by the big ann driven by the hydraulic cylinder. Besides, by means of both automatic and manual control methods, the automatic control for the spray of compartments and coal flows in surge bins can be realized, the trouble about the environmental pollution caused by continuous spray between two compartments is solved, and a lot of manpower, antifreeze can be saved through the data like the collected speed of the train and the weight of coal flow on the conveyor etc. Meanwhile, a complete consideration is taken for the application under sever conditions like cold, dust and heavy moisture etc., so that the system can be operated reliably.