Double-effect gravity curved screen

The utility model relates to a double-effect gravity curved screen. The interior of the screen casing is provided with an overflow groove, three screen pieces and two sets of washing devices. The back side of the upper part of the screen casing is provided with a feed inlet, and the overflow groove is in front of the feed inlet in the casing. A plug-in type observation door is arranged on the screen casing. The three screen pieces are fixed on the screen casing successively from top to bottom by screw bolts through the bolt holes of a screen piece pressing plate below the overflow groove. Each of the oblique lower parts of first and the second stage screen pieces is provided with a washing tank, a transverse spray pipe is arranged in each tank, and a cover plate is arranged above the tank. A discharge port is arranged below each screen piece. The underside of the screen body is provided with a front support leg, and the back side is provided with a bracket. In addition, the angle between the screen body and the ground is 45-55DEG. The curved screen has the advantages of three screen integration, simple structure, small ground occupation, high efficiency, convenient use and repair.