Steerable argon filling device and using method

The invention relates to the technical field of pipeline welding, in particular to a steerable argon filling device and a using method. The steerable argon filling device comprises a first guide unit, a first corrugated pipe, a first sealing unit, a second corrugated pipe and a second sealing unit which are connected in sequence, the first guide unit comprises a supporting ring and a plurality of guide wheels evenly distributed along the circumference of the supporting ring, and the guide wheels are connected with the supporting ring through elastic pieces so that the guide wheels can elastically stretch out and draw back in the radial direction of the supporting ring after entering the elbow. The first sealing unit and the second sealing unit are used for inflating to form a sealed space after being pushed to a preset position; and the second corrugated pipe is used for filling argon into the sealed space. According to the steerable argon filling device, the problem that the guide unit is clamped or toppled