GAS DOME STRUCTURE FOR A SEALED AND THERMALLY INSULATING VESSEL

The invention relates to a gas dome structure (1) intended for a sealed and thermally insulating tank. The strucutre comprises: - a sealed pipe (10) equipped with a connecting flange (18) and a lowerlongitudinal end (15) intended to pass through the tank roof; - a cover (19) that is fixed to said connecting flange (18); - a gasket (20) that is compressed between the cover (19) and the connectingflange (18); - a vapour collecting pipe (3, 17) that passes hermetically through a wall of the sealed pipe (10); - the sealed pipe (10) comprising a carrier plate (29) that supports an insulating plug(30) that seals the upper portion of the sealed pipe (10). 本发明涉及种用于密封隔热罐的气体圆顶结构(1)，其包括：-密封管(10)，配备有连接凸缘(18)和用于穿过罐顶的下纵向端(15)；-盖(19)，固定到所述连接凸缘(18)；-垫圈(20)，被压缩在盖(19)和连接凸缘(18)之间；-蒸气收集管(3,17)，密封地通过密封管(10)的壁；-密封管(10)包括承载板(29)，承载板支撑隔热塞(30)，隔热塞密封密封管(10)的上部。