Boats and ships chimney top blast pipe and chimney roof complex structure

The utility model discloses a boats and ships chimney top blast pipe and chimney roof complex structure, including blast pipe and chimney roof, the chimney roof is equipped with a through -hole, the welding has first drum on the through -hole, the blast pipe is worn out from first drum, the internal diameter of first drum is greater than the blast pipe external diameter, passing first drum just is located above the first drum the welding has the annular to lap on the blast pipe surface downwardly extending is gone up to the annular apron has the second drum, the second drum covers first drum, furthermore, the lower part of second drum is the round platform shape section of thick bamboo of an inversion, and the internal diameter at the lower border of the round platform shape section of thick bamboo of inversion is greater than first drum external diameter, the utility model discloses avoided the damage of blast pipe expend with heat and contract with cold to chimney roof and blast pipe structure, can prevent