Quick-open-and-close valve

The utility model relates to a quick-open-and-close valve. The quick-open-and-close valve comprises a valve body, a bonnet, a valve rod, a clack and a valve seat, wherein the bonnet is provided with a sliding groove matched with the valve rod, the valve rod is slidably connected into the sliding groove, a spring for upwards supporting the valve rod sleeves the valve rod, the sliding groove is provided with an opening in the upper end of the bonnet, a pin shaft is arranged in the radial direction of the inner wall of the position of the opening, the positive projection of the pin shaft falls onto the diameter of the end part of the valve rod, a semicircular curved block which is cut along the axis of the valve rod coaxially sleeves the pin shaft, the curved block comprises a straight part which is named by the diameter thereof and a curved part which is named by the curved surface thereof, one side, relative to the end surface of the valve rod, of the straight part is provided with an arc-shaped convex block, the arc-shaped convex block is located on one side of the straight part, the arc-shaped convex block is connected with the end surface of the valve rod in a contact manner, one side of the curved part is fixedly connected with a handle, the handle is connected with the edge of the opening in a contact manner, and the end surface of the valve rod and the inner wall of the opening are provided with concave surfaces along the rotating trajectory of the arc-shaped convex block. The quick-open-and-close valve has the effects of convenience in operation, labor saving and quick opening and closing.