| 摘要 |
A closure assembly for a pressure vessel having an opening in the external surface thereof, comprising a concentric guide track secured to the external surface of the pressure vessel, a curved concentric closure or door configured to conform to the curvature of the pressurized tank, means for interlocking the concentric door to the pressure vessel when the door is in the closed position and an inflatable seal that fills the void between the door and the pressurized tank when the door is closed and the seal inflated. The concentric guide track includes upper and lower concentric tracks upon which the concentric door is mounted and capable of moving along the track such that it can be rotated to the back of the pressure vessel when in the opened position and rotated to close and seal the opening within the pressure vessel in the closed position. Door restraining flanges are provided which correspond and interact with the leading and trailing edges of the concentric door in order to interlock the door to the pressure vessel when the door is closed. Once the pressure vessel is pressurized, the concentric door is pressed against the restraining flanges and the forces of pressurization are transferred from the interlocked concentric door to the pressure vessel.
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