Telescopic chimney

The utility model discloses a telescopic chimney. This telescopic chimney includes: urceolus (1), set up in urceolus (1) inside basis (2), set up in at least one inner tube (3) of basis on (2), set upin first backup pad (4) on the basis (2), first backup pad (4) with the lower terminal surface fixed connection's of inner tube (3), and first backup pad (4) have a plurality of first through -hole (401), set up in on the lateral wall of inner tube (3), have second backup pad (5) of a plurality of second through -hole (501), first through -hole (401) with second through -hole (501) one -to -one passes first through -hole (401) and second through -hole (501), and bury underground in crab -bolt (6) in the basis (2). This telescopic chimney's inner tube is more firm regularly with the basis. 本实用新型公开了种套筒式烟囱。该套筒式烟囱包括：外筒(1)，设置于所述外筒(1)内部的基础(2)，设置于所述基础(2)上的至少个内筒(3)，设置于所述基础(2)上的第支撑板(4)，所述第支撑板(4)与所述内筒(3)的下端面固定连接的，并且所述第支撑板(4)具有多个第通孔(401)，设置于所述内筒(3)的外侧壁上的，具有多个第二通孔(501)的第二支撑板(5)，所述第通孔(401)与所述第二通孔(501)对应，穿过所述第通孔(401)和所述第二通孔(50