Pipeline sealing rapid cutting device

The utility model provides a rapid cutting device for pipeline sealing. Including a scale, a first installer and a second installer are connected to the graduated scale in a sliding manner; the middleof the lower end of the second installer is in threaded connection with a sliding cone; the lower end of the first installer is in threaded connection with a connecting column; a cylindrical cuttingknife is arranged in the middle of the lower end of the connecting column; at least two adjusting through holes are formed in the cylindrical cutting knife at equal intervals; an inserting rod is arranged on the lower side of the left end of the connecting column, extends into the connecting column and penetrates through an adjusting through hole in the cylindrical cutting knife; the left end of the inserting rod is fixedly connected with a movable column; by means of the design, the distance between the cylindrical cutting blade and the sliding cone can be adjusted, then the sealing radius isadjusted, the sealing manu