Vertical Installation Solution of Large Nuclear Capacitor

The solution for vertical-type of circumferential welding of large nuclear capacitor products has the process ability of welding by one side and molding by both sides, able to complete the backing welding of single-sided welding and both-sided molding. Front-sided filling is welded by narrow gap hot-wire TIG welding on transverse welding position. It is able to satisfy the welding of low alloy steel such as SA508-3, SA533-B and 12Cr2Mo1.The equipment uses four-welding gun narrow gap hot-wire TIG welding on transverse welding position, U-profile slope welding, and welding by one side and molding by both sides. The workstation is equipped with workpiece clamping and position adjustment, workpiece rotation, pre-heating, post heating, intermediate heat treatment (induction heating), lifting operation platform and welding installation arm, water/ electricity/gas supply and control for platform, supporting elevator for platform, and other auxiliary systems; able to realize specialized, automated and informationalized welding.

Narrow Gap Submerged Arc Welding Butting of Thick-Walled Cylinder Shell

Cross-welding column and booms and the welding roller frame are used to complete longitudinal and circumferential surfacing of internal wall of large cylinder shell, and the narrow gap welding of vertical circumferential weld inside and outside cylinder shell. DIG's narrow gap submerged arc welding system is a set of closed-loop submerged arc welding system that can accurately realize narrow welding butting.The minimum end of  I-type slope submerged arc welding can be narrow to 18mm with the depth of the welding torch reaching 350mm. When the plate thickness is 50mm, the welding efficiency of I-type slope submerged arc welding is 0.5 times higher than that of ordinary submerged arc welding. When the plate thickness reaches 200mm, the efficiency can be increased by at least 1.5 times.