高海拔输油管道气保护药芯焊丝半自动焊工艺研究与应用

Research and Application of Semi-Automatic Welding Technology of Gas Shielded Flux-Cored Wire for High Altitude Oil Pipeline

全位置自动焊接工艺技术具有焊接效率高、质量稳定等优点,但是在高原地区的山区丘陵等地段,无法采用自动焊进行高效作业。为提高该条件下的施工效率,本论文开发了一种气保护药芯焊丝半自动焊工艺,该工艺采用纤维素打底气保药芯下向填充焊接,填充采用二氧化碳和焊材药剂的气渣联合保护焊,同时采用成本低互换性强的通用型焊枪备件耗材,设计一种半自动专用焊枪导气电缆,有效降低了项目机组的运行成本。该技术成功应用在高海拔输油管道特殊地段焊接施工中,有效提高了焊接工效和合格率,在今后高原管道工程建设中具有广泛的应用前景。

The all-position automatic welding technology has the advantages of high welding efficiency and stable quality, but in mountainous areas and hills in the plateau area, automatic welding cannot be used for efficient operation. In order to improve the construction efficiency under this condition, This paper developed a semi-automatic welding process of gas shielded flux-cored wire, which uses cellulose backing, gas-shielded flux-cored down-filling welding, and a combination of carbon dioxide and welding consumables for gas-slag filling. At the same time, the general-purpose welding torch spare parts with low cost and strong interchangeability are used for protection welding, and a semi- automatic special welding torch gas guide cable is designed, which effectively reduces the operating cost of the project unit. The technology has been successfully applied in the welding construction of special sections of high-altitude oil pipelines, effectively improving the welding efficiency and qualification rate, and has broad application prospects in the construction of plateau pipeline projects in the future.