Unpowered protective enclosure device used for centrifugal casting machine

The utility model discloses an unpowered protective enclosure device used for a centrifugal casting machine, which comprises a moving end side protective enclosure, a fixed end side protective enclosure, an upper end moving enclosure mechanism and a shaft, wherein the moving end side protective enclosure and the upper end moving enclosure mechanism are connected via the shaft; and the upper end moving enclosure mechanism comprises a weight adjustment mechanism, an adjustment moment actuating arm, an upper enclosure and a limiting mechanism. When the unpowered protective enclosure device is closed, the end part of the upper enclosure is hermetically matched with the end part of the fixed end side protective enclosure. When the unpowered protective enclosure device is opened, the limiting mechanism is limited on the outer surface of the moving end side protective enclosure. Vertical ribs are evenly distributed on the moving end side protective enclosure and the fixed end side protective enclosure. The unpowered