The rail welding equipment is distributed in Chingpu Rail Welding Factory and Lujhu Rail Welding Factory which can be used for welding on both depot and main line rails. The equipment includes flash-butt welding machine, rail grinder machine, rail profile grinding machine, vertical rail joint bender, horizontal rail joint bender, rail tensor, rail changer, air dryer, diesel generator, air compressor, ultrasonic flaw detector, straightness measurer, rail electrical transport crane, etc which can fully accomplish all rail welding demands. For welding in the depot, the rail welding equipment is installed in the welding factory for the welding process; for welding on the main line, the welding equipment is installed into a 23 foot container, transferred onto a rail wagon and towed to the welding site by locomotives.
The flash-butt welding machine welds the rail into a long rail which can hold train load, heat cycle pressure and rail shoring dynamic stress. The welding equipment is made of mechanical system, power supply system, cooling system and a control system. The programmable logic controller and data acquisition system is responsible for ensuring the accuracy and reliability of welding parameters in the welding process. The data acquisition system can capture all technical records and conduct data analysis to determine whether the welding results are qualified. Moreover, it ensures the welding quality by monitoring and recording voltage change, current fluctuation, displacement and pressure during the entire welding process.