Waterfall type cap sorter

The invention relates to the technical field of automatic machinery, in particular to a waterfall type cap sorter. The waterfall type cap sorter comprises a housing assembly, a bottle cap conveying assembly, a driving assembly, a pneumatic conveying assembly and a backflow assembly, wherein the bottle cap conveying assembly is arranged on the inner side of the housing assembly, the driving assembly is in driving connection with the bottle cap conveying assembly, the backflow assembly is arranged on one side of the top of the housing assembly, bottle caps are arranged at the lower portion of the housing assembly, the driving assembly drives the bottle cap conveying assembly to convey the bottle caps to the top of the bottle cap conveying assembly, the bottle caps are blown to the backflow assembly by starting the conveying assembly, the bottle cap conveying assembly can make openings of the bottle caps to always face the outer side in the conveying process. The waterfall type cap sorterhas the advantages that the bottle cap conveying assembly makes the bottle caps with the openings outward to be left in the conveying process, the bottom caps with the openings inward are removed, itis achieved that the bottle caps are consistent in opening direction, and the bottle cap sorting effect is improved; in the bottle cap conveying process, the bottle caps are not in contact with a groove wall, and the problem is solved that a conventional turntable type cap sorter causes stains due to multiple times of back-and-forth friction.