Ultralow-temperature top-entry ball valve

The utility model provides an ultra-low temperature top entry type ball valve which comprises a valve body foundation trench, a detachable valve body, a connecting bolt, a side edge supporting body, a valve ball body, a valve shaft, a driving motor, a motor support and a supporting rod, the detachable valve body is clamped above the valve body foundation trench, and the connecting bolt is embedded in the valve body foundation trench and the detachable valve body through bolts. The side supporting body is embedded in the valve body foundation trench; the valve ball body is embedded in the valve body foundation trench and the side edge supporting body, the valve shaft is installed above the valve ball body through a bolt, and the driving motor is installed at the top of the valve shaft through a bolt; the motor support is embedded in the outer side of the driving motor and installed on the surface of the detachable valve body through a supporting rod. Due to the arrangement of the side edge supporting body, the