| 摘要 |
The present invention relates to a bad smell cut-off device for a manhole which comprises: a cover (12) having a filtering screen (16) in a through hole (14) thereof; a support frame (24) which is disposed in between a base frame (10) and the cover and which has multiple connection holes (3) formed thereon; a drain trap (18) which is composed of a connection pipe (42), a soft tube (44) and an elastic piece (46) and which is connected to each connection hole (38) for cutting off bad smell; and an outlet (22) which is formed on the bottom surface (36) of the support frame (24) and which is opened and closed by an elastic opening/closing plate (20). The bad smell cut-off device for a manhole is provided to smoothly discharge a high pressure poisonous gas, which is generated by wastewater inside a manhole, through the outlet (22). |
