Welding fixture for heat exchange tube

The utility model provides a welding clamp for a heat exchange pipe, and belongs to the technical field of heat exchange pipe welding. The welding fixture for the heat exchange tube comprises a first fixture and a second fixture connected with the first fixture. During use, a limiting rod is moved in the direction far away from a limiting hole, the limiting rod compresses an elastic piece, the limiting rod can be separated from the interior of the limiting hole, then a first rotating sleeve, a first elastic sleeve and a heat exchange pipe can be rotated, after rotation is completed, the limiting rod is loosened, and the limiting rod can be inserted into the limiting hole again under the action of the elastic piece; the first rotating sleeve is further limited and fixed, the heat exchange pipe is further limited and fixed, rotation of the heat exchange pipe is completed, the heat exchange pipe can be rotated after a limiting rod is pulled out of a limiting hole, rotation of the heat exchange pipe is convenient