Device is changed to engineering child capsule

The utility model relates to a device is changed to engineering child capsule, including supporting the ring and installing the extension fixture on supporting the ring, support the ring and be the the ring structure that a level set up, install along support ring circumferencial direction evenly distributed's expanding -mechanism on should supporting ring upper end anchor ring, the extension fixture includes guide rail, slider, capsule rim of the mouth clamp plate and drive screw, and the guide rail forms a direction draw -in groove including direction installation piece A and direction installation piece B between two guide rails, slider movable mounting is in the direction draw -in groove to can be along supporting ring radial movement in the direction draw -in groove, the slider is close to the ring center of supporting an one end welded connection capsule rim of the mouth clamp plate, and the slider other end is connected with a drive screw, and a locking device is still installed at the slider middle pa