| 摘要 |
PURPOSE: An automatic welding system for the inner piping of a trench, which welds steel pipes arranged in the trench, is provided to maintain inert ambient and to improve welding quality by preventing that the torch of a welding house is influenced from wind. CONSTITUTION: An automatic welding system for the inner piping of a trench comprises a transparent window, a diaphragm, a blower, a pressure house, an orbit(301), a guide(302), a driving part(303), a feeder(304), a torch(305), an air-duct(306) and a flame retardant cloth. The flame retardant cloth paper comprises a through hole in which the pipe installed at both sides downward of a frame, passes. The transparent window is installed on the top of the flame retardant cloth. The diaphragm is installed in the other both sides of the frame. The blower is installed in the upper side of the frame.
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