Harbin Welding Institute Limited Company

Qilong Tang

Dong Du

Bing Du

Zhanli Yang

Zhongwang Gong

Wei Li

Yajun Wu

Shanbao Zhang

Debin Bai

Zekun Yang

Dakui Fei

Xiucheng Xiao

Yongbo Yang

Guangnan Zhao

The present disclosure relates to electro-conduction devices and methods for submerged arc welding of straight-seam steel pipes and in particular to a lateral electro-conduction device and method for multi-wire submerged arc inner/outer welding of a straight-seam steel pipe. The present disclosure aims to overcome the problem of poor closing of the electromagnetic field resulting from the existing negative-pole electro-conduction mechanism and the problem of unstable welding process resulting from bending deformation in the steel pipe welding process. The device includes: a floating surface contact electro-conduction device, capable of forming a surface contact with an outer surface of the straight-seam steel pipe; a lateral electro-conduction brush device, including multiple electro-conduction brushes and electrically connected with the floating surface contact electro-conduction device; a lateral electro-conduction metal plate. electrically connected with a negative-pole wire harness of a welding machine and electrically connected with the lateral electro-conduction brush device.

Lateral electro-conduction device and method for multi-wire submerged arc inner/outer welding of straight-seam steel pipe

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Heilongjiang, China

Qilong Tang