Exhaust pipe assembly, volute and electrical equipment

The utility model provides an exhaust pipe assembly, volute and electrical equipment wherein the exhaust pipe assembly comprises: a pipe body, the pipe body comprises a plurality of splicing pieces, the plurality of splicing pieces are distributed in a ring shape, and the plurality of splicing pieces can move relatively; and the adjusting assembly is movably arranged on the pipe body, and the adjusting assembly is used for adjusting the opening area of the first end of the pipe body.