Multiple-elasticity gate valve

The utility model discloses a multiple-elasticity gate valve. The multiple-elasticity gate valve is characterized by comprising a valve body, a valve cover, a valve rod, a flashboard, a valve seat and a hand wheel, wherein the flashboard is perpendicular to a pipeline; a sealed surface is formed by the flashboard and the end wall of the pipeline when the pipeline is sealed by the flashboard; annular cambered convex edges are integrally formed on both sides of the flashboard; a groove is formed in the end wall, relative to the flashboard, of the pipeline, and the valve seat is embedded in the groove; a compression spring is arranged between the valve seat and the bottom wall of the groove; the two ends of the compression spring are fixedly connected with the bottom walls of the valve seat and the groove, respectively; a cambered groove corresponding to the cambered convex edges is formed on one side, relative to the flashboard, of the valve seat. The multiple-elasticity gate valve aims at reducing the abrasion between the flashboard and the valve seat, enhancing the elastic contact of the flashboard and the valve seat, improving the sealing property during closure and strengthening the stability of the product in use.