Welding apparatus of the inside surface of pipe using unit used for welding apparatus of the inside surface of pipe

摘要

The present invention relates to a pipe inner surface welding apparatus unit and a pipe inner surface welding apparatus using the same, a pair of rails provided with a circular tooth formed on the inner peripheral surface of the pipe inner surface welding apparatus, a plurality of chucks coupled to the inner surface of the pipe And a carriage for driving the inner circumferential surface of the rail clamps, having a clamp and at least three pairs of driving wheels engaged with a predetermined distance in the circumferential direction of the rail clamps, the carriage being circumferentially from the inner surface of the rail clamp. Maximizes the frictional force by supporting three points at regular intervals to improve the clamping force, and reduces the welding error by safely rotating 360 ° without welding or circumference in the circumferential direction of the inner surface of the rail clamp. have.