The LDY type metallurgical electric single beam crane (hereinafter referred to as the crane) is a space transportation tool designed in accordance with the JB/T1306-2008 standard and in compliance with the Quality Inspection Office's special document [375], which is used in conjunction with the YHII type electric hoist. Its main function is to complete the displacement of heavy objects required for lifting and transportation in the metallurgical production process in a timely and rapid manner through lifting hooks or other lifting devices in an intermittent and periodic manner. It is an important tool and equipment for improving labor productivity in metallurgical and casting sites in modern industrial enterprises. Scope of application: LDY type cranes are suitable for working in environments with a temperature ≤ 60 ℃, relative humidity ≤ 85%, altitude below 2000m, and no corrosive media.