Prestressed concrete pressure vessel and method for making such a vessel
AssigneeT. Y. Lin International
InventorPhilip Y. Chow
Life of this patent
Estimating the term…
Abstract
A pressure vessel and a method for distributing the stresses in a thick-walled high-pressure vessel, so that they lie within allowable limits, by constructing the wall in a series of generally concentric layers, at least one intermediate layer of which is to be constructed before the other layers. The intermediate layer is constructed above a base, resting on it through a sliding joint. Then it is placed under an external prestressing pressure. Thereafter, that layer is secured to the base by a rigid concrete connection. The remaining layers of the wall are then constructed and are subjected to an external prestressing pressure. Preferably, stress-relieving slots are applied to the innermost layer, during its construction.
Claims6
A method for distributing the stresses in a thick-walled high-pressure vessel, so that they lie within allowable limits, comprising the steps of
- constructing the wall in a series of generally concentric layers, at least one intermediate layer of which is to be constructed before the other layers,
- constructing said one layer above a base, so that it rests on said base through a sliding joint,
- then stressing said one layer with an external prestressing pressure,
- thereafter connecting said one layer with the base by a rigid concrete connection,
- then constructing the remaining layers of said wall, and
- thereafter stressing the layered walls with an external prestressing pressure.
The method of claim 2 wherein there is the step of applying stress-relieving slots to the innermost layer of said wall, as part of said step of constructing the remaining layers.
A thick-walled high-pressure vessel, in which the stresses lie within allowable limits, including in combination
- a series of generally concentric layers including at least one preconstructed intermediate layer initially resting on a base through a sliding joint, and, after application of an external prestressing pressure, is secured to the base by a rigid concrete connection,
- the remaining layers of said wall being thereafter constructed and stressed with an external prestressing pressure.
Dependencies are inferred from the claim text.