Pipeline weld defect detection device

The utility model relates to the related technical field of pipeline welding seam detection, in particular to a pipeline welding seam defect detection device which comprises a guide hoop, a pipeline welding seam detector and a guide component, a positioning plate is arranged at one end of the guide hoop, and the guide hoop is positioned on a primary welding pipe; the end part of the first-stage welded pipe is welded and connected with a second-stage welded pipe, a scanning probe on the pipeline welding seam flaw detector corresponds to the position of a welding seam between the first-stage welded pipe and the second-stage welded pipe, the guide assembly is arranged on the pipeline welding seam flaw detector, and the guide assembly is formed by combining a roller seat and a roller, and when the pipeline welding seam flaw detector is actually used; according to the pipeline welding seam defect detection device, the guide hoop, the pipeline welding seam flaw detector and the guide assembly are combined to form t