Low temperature pipeline welding bead leak detection tool

The utility model discloses a low temperature pipeline welding bead leak detection tool comprising a tool body and a conversion joint. The tool body comprises a pipe body and a circular ring pipe body welded on the outside of the pipe body. The pipe is provided with an installation hole, which is welded with a short tube. The tool body can be cut symmetrically along the axial direction of the pipe body. The end of a short pipe is provided with a conversion joint, which is constituted by a lock nut, a compaction gasket, a sealing ring and a quick-release clamp. The conversion joint is connected to the leak detection tool through the quick-release clamp. The inner diameter of the circular ring pipe is smaller than the outer diameter of the pipe body, and the inner diameter of the pipe body as well as the inner diameter of the circular ring pipe is a little larger than the outer diameter of the detected pipe. The utility model has advantages of simple structure, convenient, reliable connection, use, low costs, a