| 摘要 |
The present invention relates to a blocking device for blocking odor by being installed in a manhole. Especially, the odor blocking device improves a drainage structure so that a rotation board is opened automatically using a weight for drainage, and is closed automatically when drainage is completed. For the same, a floor plane of an enclosure is inclined for inpoured wastewater and rainwater to be cornered to one side, and a discharge hole is formed in the inclined side of the bottom plane eccentrically. A rotation plate which is divided into an opened part and a closed part by a level difference by a protrusion as being wider than the discharge hole is hinged to the drain hole for the center of gravity to lean to the closed part. The opened part of the rotation plate is located outside the bottom plane of the enclosure, and the closed part is located inside the bottom plate, so that the center of gravity of the rotation plate leans to the closed part to maintain a closed state in normal times. When the rainwater or the wastewater flow in and are collected around the opened part, the center of gravity moves to the opened part from the closed part, the opened part is opened, and then the inpoured waste water or the rainwater is discharged at a time. |
