Patent ID: 7431349

Claim:
A releasable connection arrangement, with a non-positive and positive fit, for two rotationally symmetrical components, at a connection point, especially for creating a leak-proof connection between closure elements on power plant valves, the connection arrangement comprises: a first component, which has a collar projecting radially outwards with a first clamping surface and a first bearing surface; a socket disposed at an open end of a second component for retaining the collar by gripping round it axially; a second bearing surface formed in the socket to cooperate with the first bearing surface; a groove formed either in the first or in the second bearing surface to receive a seal; a second clamping surface formed in the socket at an axial distance from the second bearing surface, and with a number of ring wedge-shaped tensioning members which are distributed over the circumference and are disposed such that first wedge surfaces abut the first clamping surface and second wedge surfaces abut the second clamping surface; wherein an expanding ring has radial expansion slots arranged spread out in the circumferential direction and a conically formed inner expanding surface, with which it abuts a correspondingly conically formed third expanding surface disposed on the first component, and that can be radially expanded by axial displacement; and tensioning means are provided, acting between the expanding ring and one of the components.