| 摘要 |
<p>There is provided a double-walled structure for coupling to another double-walled structure. Said coupling connects one female end portion (1F) of the one structure (1) and one male end portion (2M) of the other structure (2) together. Said connecting requires only connecting of the outer walls (1B; 2B) of the structures together, providing an overlapping connection. The inner walls (1A; 2A) of said structures have a gap (G) between their ends, when connected. Thereby the coupling of the structures (1; 2) are facilitated. The space between the inner wall (1A; 2A) and outer wall (1B; 2B) of the structure is occupied by an insulating material (1C; 2C), such as a sound absorbing fibrous batting. The space between the male/female end portions for connection to a female/male end of another structure is filled by a seal 1S; 2S), preventing loss of insulating material and providing insulation of the joint coupling the double-walled structures together. The structure can be used, especially, as a segment in a sound-absorbing ductworks system. <IMAGE></p> |
