Reverse buckling sanitary rupture disc assembly
AssigneeFike Corporation
InventorsMichael D. Krebill, E. Dean Miller
Life of this patent
Estimating the term…
Abstract
A metal reverse buckling sanitary rupture disc is provided having a central bulged section in which the convex surface of the bulged section is relatively smooth and of substantially uninterrupted configuration. A small segment region of the central bulged section is strain hardened by plastic deformation causing the segment region to have greater residual stress than the remainder of the central bulged section. When the disc is subjected to an overpressure condition against the convex surface of the bulged section sufficient to effect reversal of the bulged section, such reversal commences at the higher residual stress segment region of the bulged section.
Claims29
A reverse buckling sanitary rupture disc comprising:
- a metal rupture disc having a central bulged section presenting a central axis and including a convex surface and an opposed concave surface, a flange portion surrounding the central bulged section, and a transition zone joining the flange portion to the central bulged section,
- the convex surface of the bulged section being relatively smooth and of substantially uninterrupted configuration, and
- the bulged section being provided with a segment region defining a discrete region having greater residual stress than the remainder of the central bulged section.
A reverse buckling sanitary rupture disc assembly comprising:
- a metal rupture disc having a central bulged section presenting a central axis and including a convex surface and an opposed concave surface, a flange portion surrounding the central bulged section, and a transition zone joining the flange portion to the central bugled section,
- the convex surface of the bulged section being relatively smooth and of substantially uninterrupted configuration, and
- the bulged section being provided with a segment region defining a discrete region having greater residual stress than the remainder of the central bulged section,
- an annular member mounted in supporting relationship to the face of the flange adjacent the concave surface of the rupture disc,
- said annular member having an inner edge, said inner edge being provided with inwardly extending, circumferentially spaced projections, which underlie the transition zone of the rupture disc and a part of the concave surface of the bulged section of the disc.
A method of preparing a reverse buckling sanitary rupture disc assembly comprising:
- providing a metal rupture disc blank having opposed surfaces;
- imparting a concentrated force on a portion of one surface of the blank sufficient to deflect a segment region of the blank to a predetermined extent from the main body of the blank, said segment region defining a discrete region of the blank;
- bulging a central portion of the blank to form a bulged section presenting a central axis and having a convex surface and an opposed concave surface, a flange portion surrounding the central bulged section, and a transition zone joining the flanged portion to the central bulged section,
- the deflected segment region being a confined area substantially less than the overall area of the bulged section;
- and
- returning the deflected segment region to substantially its initial position to cause the metal of the segment region to have greater residual stress than the remainder of the central bulged section.
Dependencies are inferred from the claim text.