Automatic slag scraping cut-off ball valve

The utility model discloses an automatic slag scraping cut-off ball valve which comprises a blank cap, an inner hexagon screw, a lower valve rod, a first O-shaped ring, a first stud, a fourth O-shaped ring, a ball body, an upper valve rod, a support, a second stud and a nut. The blank cap is fixedly connected to the bottom end of a right valve body through the inner hexagon screw, and one side of the right valve body is fixedly connected with a left valve body through the first stud; meanwhile, a second O-shaped ring and a third O-shaped ring are arranged at the joint of the right valve body and the left valve body, the interiors of the right valve body and the left valve body form a mounting cavity, a valve seat is mounted in the mounting cavity, and fourth O-shaped rings are arranged at the joints of the valve seat and the right valve body and the joint of the valve seat and the left valve body respectively; according to the device, the slag scraping piece is tightly attached to the ball body, in the rotati