Pipeline connecting structure for centrifugal pump

The utility model is applicable to the technical field of centrifugal pumps, and provides a pipeline connecting structure for a centrifugal pump, which comprises a centrifugal pump main body, a connecting pipe and an external pipeline detachably connected with the connecting pipe, and a connecting disc is fixedly mounted at one end, close to the connecting pipe, of the external pipeline. According to the pipeline connecting structure for the centrifugal pump, when the connecting disc and the mounting disc are assembled through the nut, the connecting disc can be subjected to auxiliary positioning through the threaded rod and then is released from the mounting disc, and the nut is screwed to the surface of the threaded rod, so that the nut drives the connecting disc to be tightly attached to the mounting disc, and a rotating seat is rotated; the rotating seat drives the limiting plate to be attached to the surface of the nut through the connecting plate, the nut is limited through the limiting hole in the limi