Forge unsteady ball valve of ultra -low temperature upper assembling type of valve body

The utility model relates to a ball valve. Forge unsteady ball valve of ultra -low temperature upper assembling type of valve body, including the ball valve main part, the ball valve main part includes upper assembling type's valve body, be equipped with the spheroid in the valve body, the spheroid right side is equipped with sealed disk seat, the spheroid left side is equipped with the support disk seat, water conservancy diversion direction a from left side to the right side of ball valve main part, be equipped with valve seat ring between valve body and the spheroid, valve seat ring is last to be equipped with first pressure release hole, first pressure release hole site is in valve seat ring's upper end, valve seat ring's inner wall is connected to the one end in first pressure release hole, valve seat ring's outer wall is connected to the other end in first pressure release hole, the the central axis direction perpendicular to horizontal plane in first pressure release hole, be equipped with the first re