Baffle box choke keeps off dirt curtain

The utility model discloses a baffle box choke keeps off dirt curtain, including fixed plate, door curtain and clamp plate. Evenly be provided with two at least vertical cylindrical voids on the face of fixed plate, the door curtain comprises many align to grid soft on the extension board, is provided with the recess that equals with soft quantity at the top of extension board, and soft fifty percent discount department is inlayed and is established in the recess, and the bolt passes the cylindrical void of clamp plate, extension board and fixed plate, presss from both sides the door curtain tightly between fixed plate and clamp plate, and screw the nut can press from both sides the door curtain tightly between fixed plate and clamp plate loosening nut, conveniently highly adjusting the door curtain.