| 摘要 |
<p>A pressure device is provided with a cover member which is removably attached thereto by a pair of clamping rings which are hydraulically actuated laterally outwardly and inwardly relative to flanges on the pressure device and cover member to respectively release the cover and interengage the cover with the device. The clamping rings are pivotally interconnected with the device such that lateral outward displacement of the clamping rings is accompanied by radial outward displacement of the pivot axis to provide clearance for removal of the cover member. The clamping ring members are guided during a portion of the lateral inward and outward displacement thereof, and the guide arrangement supports the clamping rings in the laterally outermost positions thereof. A safety interlock is provided between the displaceable ends of the clamping rings and the cover member to prevent lateral outward displacement of the clamping rings to release the cover member until the interior of the pressure device has been vented to atmosphere. For this purpose, the ends of the rings are provided with pins circumferentially interengaged by a latch plate, and the cover member is provided with a removable bleed valve which blocks displacement of the latch plate from the pins until the vessel has been vented and the valve removed from the cover member.</p> |
