LH-300型等离子焊管机是大庆油建公司和哈尔滨焊接研究所共同完成的科研项目,应用于泡沫夹克管预制厂的钢管焊接。目前已焊接管道20多公里,并通过了技术鉴定。该机主要由旋转机构、焊接电源、焊枪系统、控制系统、水系统、电系统及托管架等部分组成。管口组对采用气动卡盘卡管,气动托架升管,管子双主动同步旋转,组对精度较高。采用等离子焊接具有小孔效应,第一遍自熔,第二遍填充焊丝,实现单面焊双面成型工 LH-300 plasma welding machine Daqing Oilfield Construction Company and Harbin Welding Institute jointly completed a research project, used in foam jacket precast steel pipe welding. Currently welded pipe more than 20 kilometers, and passed the technical appraisal. The machine is mainly composed of rotating mechanism, welding power source, welding torch system, control system, water system, electrical system and stinger. Pipe nozzle group on the use of pneumatic chuck card tube, pneumatic bracket riser, pipe double synchronous active rotation, the pair of high accuracy. The use of plasma welding has a small hole effect, the first pass from the melt, the second pass filler wire, to achieve single-sided welding double-sided molding workers