Alignment device for copper pipe welding

The utility model relates to the field of water heater pipeline manufacturing, in particular to an aligning device for copper pipe welding, which comprises a clamping seat fixedly connected with the top end of a base, a lead screw is rotatably connected in the clamping seat, the lead screw is in threaded connection with a clamping jaw, the clamping jaw is attached to the surface of a main copper pipe, and a hole is formed in one side, far away from the clamping seat, of the main copper pipe. In the using process, when an operator needs to weld the end of the auxiliary copper pipe to the opening in the side face of the main copper pipe, the operator drives the clamping jaws to move by rotating the lead screw, the main copper pipe is clamped and fixed through the two sets of clamping jaws, and therefore the position of the main copper pipe cannot be easily changed in the welding process; the side opening of the main copper pipe is prevented from being changed due to one end of the main copper pipe, and the weld