Locking device for fixing a lid

A locking device for fixation of a lid (1) to an opening (8) of a pressure container with at least two locking segments (5) displaceable at right angles to an axis of the opening (8), which segments (5) bear protrusions (6) and groove-like recesses along their circumference, which in the locked position cooperate with recesses (7) and protrusions along the brim of the opening (8), whereby the displacement actuator (4) of the segments (5) is linked to the segments (5) and to at least one point of application that is on the lid (1) or on a member (3) connected to the lid (1);

• wherein the segments (5) that are arranged in the direction of the circumference of the lid (1) are pivotably supported on the lid (1) by a swivel arm (16), separate from the displacement actuator (4), being interposed, which swivel arm (16) in turn is pivotably connected to the segments (5).