Anti-backflow sliding window drainage structure

The utility model discloses an anti-backflow sliding window drainage structure which comprises a main body section bar, a rail groove used for installing a sliding window is formed in the main body section bar, a first drainage hole used for draining rainwater in the rail groove out of a room is formed in the rail groove, and a blocking device is arranged on the main body section bar. The blocking device can enable the first drainage hole to be communicated when water flows from the rail groove to the outside and seal the first drainage hole when the water flows from the outside to the rail groove, so that rainwater can be prevented from flowing backwards and entering a room, the effect of preventing the rainwater from flowing backwards and entering the room is achieved, and then the watertight performance of the sliding window is improved. 本实用新型公开了一种防倒灌式推拉窗排水结构，包括有主体型材，所述主体型材上形成有用于安装推拉窗的轨槽，轨槽内设置有用于将所述轨槽内的雨水排出室外的第一排水孔，主体型材上设置有阻挡装置，阻挡装置能够在水流方向为自所述轨槽流向外界时使所述第一排水孔导通，和在水流方向为自外界流向轨槽时封闭第一排水孔，以使其能够阻挡雨水倒灌进入室内，从而达到防止雨