Pressure leakage plugging device for blast furnace pipeline

The invention discloses a pressure leakage plugging device for a blast furnace pipeline. The pressure leakage plugging device comprises a flow guiding pipe covering a leakage point of the blast furnace pipeline. One end of the flow guiding pipe is a connecting end attached to the outer wall of the blast furnace pipeline and welded to the outer wall of the blast furnace pipeline in a sealed mode. The other end of the flow guiding pipe is provided with a flange and sealed through a sealing plate. The sealing plate is in sealed connection with the flange. The outer side wall of the sealing plateis welded to a cylindrical hollow pressure relief pipe in a sealed mode. The axial center of the pressure relief pipe points to the leakage point of the blast furnace pipeline. A round through hole which enables the flow guiding pipe to communicate with the pressure relief pipe is formed in the sealing plate. The round through hole shares the axis with the pressure relief pipe. The pressure reliefpipe is provided with a v