Ball-throwing top-open type fixed valve

The utility model provides a pitching push-open type fixed valve which comprises an outer pipe assembly, an inner pipe assembly, an inner pipe assembly and an inner pipe assembly. The blocking piece element is arranged in the containing groove, one end of the blocking piece element is hinged to the containing groove, and the other end of the blocking piece element can inwards extend out of the containing groove in the radial direction of the outer pipe assembly; the elastic element can drive the separation blade element to extend out of the accommodating groove; the anchor jaw element is connected into the outer pipe assembly through a shear pin, the anchor jaw element has a first position and a second position, the anchor jaw element is located at the containing groove and can limit the blocking piece element from stretching out when located at the first position, and the anchor jaw element is located at the upper groove and can be opened outwards in the radial direction of the outerpipe assembly when locate