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US 4,308,971 AGranted
Pressure vessel and a method of producing same
AssigneeSulzer Brothers Limited
InventorHermann Straub
Life of this patent
Estimating the term…
Abstract
The large diameter pressure vessel is constructed without flanges and has resiliently deformable ring elements welded to the respective ends of a hollow member and a cap. These ring elements are locked together by various types of locking means. In one embodiment, a ball type closure is used while in other embodiments hasps are utilized.
Claims13
A pressure vessel comprising
- a hollow member having a cylindrical end of predetermined outer diameter;
- a cap having a cylindrical end of an outer diameter equal to said predetermined diameter;
- a first thin ring element free of radial flanges welded to said end of said hollow member to form a vessel part, said first ring element having an outer diameter adjacent said hollow member equal to said predetermined diameter;
- a second thin ring element free of radial flanges welded to said end of said cap to form a cover, said second ring element being disposed in overlapping relation with said first ring element and having an outer diameter adjacent said cap equal to said predetermined diameter;
- and
- means for locking said overlapped ring elements together, said locking means including at least one groove in said first ring element, at least one radially disposed aperture in said second ring element, a locking element disposed in said aperture for movement between an unlocking position within said aperture and a locking position within said aperture and said groove, and an outer clamping ring about said second ring element and said aperture for moving said locking element from said unlocking position to said locking position.
3 more elements
A pressure vessel comprising
- a hollow member having a cylindrical end of predetermined outer diameter;
- a cap having a cylindrical end of an outer diameter equal to said predetermined diameter;
- a first thin ring element free of radial flanges welded to said end of said hollow member to form a vessel part;
- a second thin ring element free of radial flanges welded to said end of said cap to form a cover, said second ring element being disposed in overlapping relation with said first ring element;
- and
- means for locking said overlaped ring elements together, said locking means including an annular groove in said first ring relement, a plurality of radially disposed apertures in said second ring element, a plurality of balls, each said ball being disposed in a respective aperture for movement between an unlocking position within said respective aperture and a locking position within said respective aperture and said groove, and a clamping ring about said second ring element, said clamping ring having an internal conical surface for moving said balls from said unlocking positions to said locking positions in response to movement of said clamping ring coaxially of said ring elements.
3 more elements
A pressure vessel comprising
- a hollow member having a cylindrical end of predetermined outer diameter;
- a cap having a cylindrical end of an outer diameter equal to said predetermined diameter;
- a first thin ring element free of radial flanges welded to said end of said hollow member to form a vessel part;
- a second thin ring element free of radial flanges welded to said end of said cap to form a cover, said second ring element being disposed in overlapping relation with said first ring element;
- and
- means for locking said overlapped ring elements together, said locking means including an annular groove in said first ring element;
- a plurality of radilly disposed apertures in said second ring element;
- a plurality of plate-like closure members, each said closure member being rotatably disposed in a respective aperture and having a hasp for movement between an unlocking position within said respective aperture and a locking position within said respective aperture and said groove, and a lever extending radially outwardly of said second ring element, said clamping ring having an annular groove receiving each lever of a respective closure member whereby upon movement of said clamping ring coaxially of said second ring element, each hasp of said closure members moves between said unlocking and locking position.
5 more elements
A pressure vessel comprising
- a hollow member having a cylindrical end of predetermined outer diameter;
- a cap having a cylindrical end of an outer diameter equal to said predetermined diameter;
- a first thin ring element free of radial flanges welded to said end of said hollow member to form a vessel part;
- a second thin ring element free of radial flanges welded to said end of said cap to form a cover, said second ring element being disposed in overlapping relation with said first ring element;
- and
- means for locking said overlapped ring elements together, said locking means including an annular groove in said first ring element, a plurality of balls mounted in said second ring element for movement into and out of said groove and a clamping ring about said second ring element for moving said balls into said groove, said clamping ring having an annular recess to receive said balls with said balls out of said groove and an upwardly directed converging conical clamping surface within said recess for moving said balls into said groove in response to a downwardly directed movement of said clamping ring relative to said ring elements.
3 more elements
A pressure vessel comprising
- a hollow member having a cylindrical end of predetermined outer diameter;
- a cap having a cylindrical end of an outer diameter equal to said predetermined diameter;
- a first thin ring element free of radial flanges welded to said end of said hollow member to form a vessel part;
- a second thin ring element free of radial flanges welded to said end of said cap to form a cover, said second ring element being disposed in overlapping relation with said first ring element;
- and
- means for locking said overlapped ring elements together, said locking means including an annular groove in said first ring element, a plurality of locking members mounted in said second ring element for movement into and out of said groove and a clamping ring about said second ring element for moving said locking members into said groove, said clamping ring having a shoulder at a lower end for abutting a bottom edge of said second ring element in a raised position of said clamping ring relative to said second ring element.
3 more elements
A method of producing a large diameter pressure vessel at an erection site, said method comprising the steps of
- welding a plurality of discrete elements together at the erection site to form a hollow member and a cap each having a cylindrical end;
- prefabricating a pair of thin ring elements free of radial flanges in a shop;
- resiliently deforming each ring element into an ellipse shape;
- shipping the deformed ring elements to the erection site;
- and
- thereafter bringing each respective ring element to the original undeformed prefabricated shape, disposing each ring element in facing relation to a cylindrical end of a respective hollow member and cap and welding the respective ring element to the respective end of the hollow member and cap at the erection site.
3 more elements
A pressure vessel comprising
- a hollow member having a cylindrical end of predetermined outer diameter;
- a cap having a cylindrical end of an outer diameter equal to said predetermined diameter;
- a first ring element welded to said end of said hollow member to form a vessel part;
- a second ring element welded to said end of said cap to form a cover, said second ring element being disposed in overlapping relation with said first ring element;
- and
- means for locking said overlapped ring elements together, said locking means including an annular groove in said first ring element;
- a plurality of plate-like closure members, each said closure member being rotatably disposed in a respective aperture and having a hasp for movement between an unlocking position within said respective aperture and a locking position within said respective aperture and said groove, and a lever extending radially outwardly of said second ring element;
- and a clamping ring about said second ring element, said clamping ring having an annular groove receiving each lever of a respective closure member whereby upon movement of said clamping ring coaxially of said second ring element, each hasp of said closure members move between said unlocking and locking positions.
5 more elements
A pressure vessel comprising
- a hollow member having a cylindrical end of predetermined outer diameter;
- a cap having a cylindrical end of an outer diameter equal to said predetermined diameter;
- a first ring element welded to said end of said hollow member to form a vessel part;
- a second ring element welded to said end of said cap to form a cover, said second ring element being disposed in overlapping relation with said first ring element;
- and
- means for locking said overlapped ring elements together, said locking means including an annular groove in said first ring element, a plurality of balls mounted in said second ring element for movement into and out of said groove and a clamping ring about said second ring element, said clamping ring having an annular recess to receive said balls with said balls out of said groove and an upwardly directed converging conical clamping surface within said recess for moving said balls into said groove in response to a downwardly directed movement of said clamping ring relative to said ring elements.
3 more elements
Dependencies are inferred from the claim text.