Fluid handling – Destructible or deformable element controlled – Destructible element
Patent
1998-02-03
1999-10-19
Rivell, John
Fluid handling
Destructible or deformable element controlled
Destructible element
22020308, 220 892, 59 98, F16K 1716
Patent
active
059671700
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to pressure relief panels and more particularly such panels that are flat or domed.
1. Background Art
Pressure relief panels are designed to act as sacrificial elements in a pressure vessel assembly/enclosed volume structure and are arranged to relieve pressure within the vessel assembly/structure at a predetermined pressure level. Traditionally, these pressure relief panels have comprised a burst panel with a sealing layer adhered to it and the whole secured to the vessel assembly using a frame and gasket. The burst panel may be slotted or grooved in order to control burst pressure accurately.
This composite layer pressure relief panel arrangement has several problems principally with regard to expense of manufacture both in that there are two elements and an adhesion stage and problems of maintenance to ensure the components remain adhered together.
2. Disclosure of Invention
It is an objective of the present invention to provide a pressure relief panel which substantially limits the above mentioned problems.
In accordance with the present invention, there is provided a pressure relief panel including a burstable portion or flap defined by a peripheral edge slot or groove, characterised in that the edge slot or groove is not continuous but has interruptions and that her slots or grooves are provided over a substantial portion of the flap periphery, each being associated with and adjacent to such interruptions.
The slots adjacent to the interruptions may be inboard or outboard of the edge slot. The panel may be flat or domed.
The panel may include interruptions without adjacent slots along one edge or part of an edge to act as a hinge for a flap displaced from the panel upon over-pressure. Alternatively, the hinge side may be left unslotted.
The slots, both edge slots and/or those adjacent to interruptions, may be completely through the panel or only partially through.
The slots, both edge slots and those adjacent to interruptions may be sealed by a gasket arranged in a panel mount for a pressure vessel/structure.
Either or both of the edge slots and the slots adjacent the interruptions may be sealed by a T-shaped sealing strip which covers the slot(s) and whose leg extends into one of the slots. Both sets of slots may be inboard of the mounting frame and the slot(s) sealed by such T-shaped sealing strip.
BRIEF DESCRIPTION OF DRAWINGS
An embodiment of the present invention will now be described by way of example only with reference to the accompanying drawing in which:
FIG. 1 illustrates in plan view a pressure relief panel with outboard slots adjacent to interruptions;
FIG. 2 illustrates an expanded view of area A from FIG. 1;
FIG. 3 is a cross-section across X--X of FIG. 2;
FIG. 4 illustrates an expanded view of area B from FIG. 1;
FIG. 5 is a cross-section across Y--Y of FIG. 4;
FIG. 6 shows a portion of a pressure relief panel with supplementary features according to the invention;
FIG. 7 illustrates a further embodiment of the invention from the same aspect as FIG. 1; and
FIG. 8 is a cross-section of the further embodiment from the same aspect as that of FIG. 3.
BEST MODE FOR CARRYING OUT THE INVENTION
Consider FIG. 1. A pressure relief panel 1 has a panel flap 3 that may be flat or domed. This flap 3 is displaced when the pressure relief panel bursts. Around the flap 3, an edge slot or groove 5 is arranged to facilitate controlled rupture about the flap 3 upon over-pressure. This slot 5 is not continuous around the flap 3 but has regularly spaced slot interruptions 7 along each side. These slot interruptions 7 represent ligaments of panel material which ensure that although the slot 5 weakens the panel l it still retains some mechanical strength. This enables controlled flap burst with the interruptions 7 being associated with outboard adjacent slots 9 to ensure rupture of the interruptions 7 upon over pressure.
In order to ensure the flap 3 does not become detached from the panel 1, it is usual to have one edge or a portion thereof arranged as a
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Derry Cecil
Hume Alan Leslie
IMI Marston Limited
Rivell John
LandOfFree
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