Construction method for all-position automatic welding of hydropower-station super-size pressure steel tube
A pressure steel pipe and construction method technology, applied to arc welding equipment, manufacturing tools, welding equipment, etc., can solve problems such as tight construction schedule, unsatisfactory demand, high strength, etc., achieve reduced labor intensity, stable and reliable welding quality, and improved The effect of welding efficiency
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[0031] The present invention will be described in detail below.
[0032] A construction method for all-position automatic welding of giant penstock steel pipes in a hydropower station, comprising the following steps:
[0033] The first step is to round the steel pipe tiles with steel pipes;
[0034] The second step is to perform tack welding at the back seam of the steel pipe weld;
[0035] The third step is to clean and polish the weld groove;
[0036] The fourth step, preheating before welding;
[0037] The fifth step is to attach the flexible track to the steel pipe along the weld seam to be welded;
[0038] In the sixth step, the welding trolley with inverter pulse power supply walks and welds on the flexible track. The welding trolley adopts solid welding wire for automatic welding, and is equipped with argon-rich gas protection measures;
[0039] The seventh step is to weld the stiffened ring flaps at both ends of the steel pipe;
[0040] The eighth step is to trans...
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