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A flame arresting ventilated wall or panel for an explosion-proof enclosure comprises a stack of aluminum sheets apertured to provide a plurality of discrete, generally parallel gas flow channels disposed in crisscross patterns across the heights and widths of the sheets. Fasteners tie the sheets to

A flame arresting ventilated wall or panel for an explosion-proof enclosure comprises a stack of aluminum sheets apertured to provide a plurality of discrete, generally parallel gas flow channels disposed in crisscross patterns across the heights and widths of the sheets. Fasteners tie the sheets together into a rigid structure and are disposed in patterns surrounding and individually uniformly supporting the gas flow channels from the center of the sheets to their outer edge. Combinations of three different punched sheets are used, namely, first and second apertured sheets spaced apart by relatively thin separator sheets. Along each of the plurality of gas flow channels, each separtor sheet has a large window and the first and second apertured sheets have separate arrays of nine and sixteen flow holes, respectively, registered with the windows, each array having a total cross-sectional area about one-fourth of each corresponding window.

대표청구항 ▼

A flame arresting ventilated wall for an explosion-proof enclosure comprising: a stack of metal sheets apertured to provide a plurality of discrete, generally parallel gas flow channels extending therethrough and disposed in crisscross patterns across the heights and widths of the sheets; said stack

A flame arresting ventilated wall for an explosion-proof enclosure comprising: a stack of metal sheets apertured to provide a plurality of discrete, generally parallel gas flow channels extending therethrough and disposed in crisscross patterns across the heights and widths of the sheets; said stack comprising alternate apertured and separator sheets; fasteners disposed in crisscross patterns across the heights and widths of the sheets individually supporting and sealing said discrete gas flow channels, said fasteners extending through aligned holes in said apertured and separator sheets and effective to compress the stack into a plurality of solid columns adjacent the fasteners tying the stack together into a rigid structure resistant to deformation by explosion of gases on one side thereof while positively maintaining a predetermined spacing between adjacent apertured sheets throughout the stack; each of said apertured sheets having, in each said gas flow channel, an array of individual openings having a predetermined total area, the individual openings in successive apertured sheets being offset from one another in directions parallel to the sheets to train gas flow therethrough into labyrinthine paths; each of said separator sheets having, in each said gas flow channel, a window opening substantially larger than said predetermined total area and in registration with said arrays of individual openings in said apertured sheets; whereby quenching of hot gases flowing through said wall is effected by, first, dividing the gases into separate streams through said gas flow channels, second, further breaking up and subdividing each stream and directing it in labyrinthine paths as it passes through the individual openings in the apertured sheets, and third, alternately expanding and contracting and speeding up and slowing down said gases in said flow channels as they alternately pass between the arrays of individual openings in the apertured sheets and the substantially larger area window openings in the separator sheets.