High-pressure centrifugal fan for sweeper truck

The utility model relates to the technical field of ventilation equipment, in particular to a high-pressure centrifugal fan for a sweeper truck, which comprises a volute, an impeller is fixedly connected to the outer surface of an impeller shaft, a connecting ring is fixedly connected to the side surface of the volute, a first limiting groove and a second limiting groove are formed in the inner side wall of an annular groove, and a clamping groove is formed in the inner side wall of the second limiting groove. A rubber pad is fixedly connected into the annular groove, a connecting cover is movably connected to the side surface of the rubber pad, a clamping block is fixedly connected to the outer surface of the connecting cover, and an air inlet box is fixedly connected to the side surface of the connecting cover. According to the air inlet box, through the arrangement of the first limiting groove, the second limiting groove, the annular groove and the clamping groove, the connection convenience of the connect