The present invention relates to a backflow prevention surface valve. The backflow prevention surface valve comprises: a main body including a drainage hole into which external fluids are discharged, a fixing support unit which covers the drainage hole, and a rotation support unit which is vertically connected to the fixing support unit and has a guide groove; a rotation shaft of which one end is connected to a handle, and the other end penetrates the rotation support unit and the drainage hole; and a disc to which an other end of the rotation shaft is connected and which is vertically movable along the rotation shaft by fluids. As such, the backflow prevention surface valve prevents fluids on a lower portion from flowing backwards to an upper portion by the disc rising upwards due to buoyancy.
BACKFLOW PREVENTION SURFACE VALVE
2015-08-12
Patent
Elektronische Ressource
Koreanisch