Apparatus for preventing a drainage reverse flow of lid type

摘要

The subject innovation relates to a sewage reflux room earth, and more particularly, is directed to a separate backflow excellent operational stability by the opening and closing operation without the opening and closing means such as a spring, automatically constituted by any sewer room earth, prevent drainage reverse flow of the subject innovation sphere outdoors jidoe the one end fitted on the discharge side of the sewage pipe is downward form a bottom and a horizontal top of the outdoor sewers and to form a step and is connected to a hinge connection having a connection hole provided outside the top of the pipe and integrally; By connecting the cover to said open the opening of the connecting pipe and a closed locking eojineun jam is inserted into the connecting hole so as to teokbu the upper portion lower portion relatively formed thicker the thickness plate having recesses and protrusions and the grooves are continuous repeating formed bellows-shaped integrally there is connected to the cover, characterized in comprising means configured.