Top-mounted ball valve for petroleum transportation and use method thereof

The invention relates to the technical field of ball valves, in particular to a top-mounted ball valve for oil delivery and a using method thereof.The top-mounted ball valve comprises a valve body, a valve hole and a limiting frame, an inner pipe hole is formed in the center line of the valve body, the valve hole is formed in the valve body, and a valve ball is arranged in the valve hole; flow limiting mechanisms are arranged on the two sides of the valve body, a valve hole in the upper portion of the valve ball is in threaded connection with a limiting frame through a limiting bolt and limiting holes, three sets of limiting holes are formed in the limiting frame, and the threaded holes and threaded rods are in threaded installation; through the effect of detaching the limiting frame, the trouble that a valve ball needs to be replaced when the valve ball in a product is damaged during work is avoided during use, the replacement efficiency is high, the replacement is more convenient, through matched use of the