Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
  • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
  • F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
  • F16K17/16—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs
  • F16K17/162—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs of the non reverse-buckling-type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D51/00—Closures not otherwise provided for
  • B65D51/16—Closures not otherwise provided for with means for venting air or gas
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D90/00—Component parts, details or accessories for large containers
  • B65D90/22—Safety features
  • B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
  • B65D90/36—Weakened parts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
  • F16K17/40—Safety valves; Equalising valves, e.g. pressure relief valves with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/1624—Destructible or deformable element controlled
  • Y10T137/1632—Destructible element
  • Y10T137/1692—Rupture disc
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/1624—Destructible or deformable element controlled
  • Y10T137/1632—Destructible element
  • Y10T137/1692—Rupture disc
  • Y10T137/1699—Means for holding entire disc after rupture

Definitions

• the invention concerns a single pressure relief rupture disc and composite rupture disc apparatus designed to rupture
• the pressure relief rupture disc apparatus incorporates a rupture disc or rupture disc assembly which ruptures and vents an area when overpressure
• the non-fragmenting pressure relief apparatus is adapted for use in a variety of
• Explosion vents have been provided for many years to cover relief openings in
• bag houses are typically used to store and transport materials.
• Pressure relief apparatus also must accommodate cycling between positive and
• a rupturable section of the apparatus includes a central bulged area presenting opposed
• pressure relief rupture disc assemblies have included a pair of rupturable central areas with one of the rupture discs being
• a layer of rupturable material is positioned in overlying relationship to the series of slits in order to prevent leakage of fluid
• the lines of weakness whether in the form of a score line, or a series of elongated
• the unitary hinge area tends to also rupture
• invention includes either a single rupture disc, or a pair of rupture discs, each having a central
• the apparatus is adapted to be clamped between
• annular inlet and outlet support members in certain high pressure applications.
• a line of weakness that extends around a central part of the central section of each of the discs defines
• the line of weakness has opposed end regions in spaced
• each disc from tearing away from the peripheral flange section of a respective disc upon
• invention comprises a line of elongated, end-to-end, spaced slits having terminal ends which
• the hold-down member has an
• the hinge portion of the central section of the disc bends along the outer margin of the inwardly extending segment of the hold-down member, rather than
• the deflected portion of the segment of the hold-down member is bent into a transversely inclined or generally curved configuration along a substantial portion of the
• a hold-down member is provided in overlying relationship
• down member and the ring each have an inwardly extending, unitary segment located in aligned relationship to the hinge portion of each of the discs.
• segment of the hold-down member against the upper or outermost disc protects against fragmentation of the hinge portions of both of the discs upon forward opening of the discs by an overpressure condition, while the segment of the support ring underlying the innermost
• rupture disc of the assembly assists in presenting fragmentation of the central rupturable
• Fig. 1 is a perspective view of composite domed disc structure having a pair of
• Fig. 2 is a top plan view of the composite disc structure as shown in Fig. 1 ;
• Fig. 3 is a bottom view of the composite disc structure as shown in Fig. 1;
• Fig. 4 is an enlarged fragmentary horizontal cross-sectional view taken substantially
• Fig. 5 is an enlarged fragmentary plan view of opposed ends of slits defining a line
• FIG. 6 is an enlarged fragmentary cross-sectional view taken substantially on the line
• Fig. 7 is a schematic cross-sectional view through one of the bulged rupture discs in
• Fig. 8 is an enlarged essentially schematic representation of the segment of the
• annular hold-down ring which extends into the center of the ring and showing the manner in
• FIG.9 is an enlarged schematic cross-sectional view taken on the line 9-9 of Fig. 8 and
• Fig. 10 is an exploded perspective view of the embodiment of the invention having
• Fig. 11 is a top plan view of the rupture disc assembly of Fig. 1 and showing the
• Fig. 12 is a perspective view of alternate non-fragmenting pressure relief apparatus
• Pressure relief apparatus 20 is optionally adapted to be clamped
• Apparatus 20 is especially useful for protecting processing equipment, pressure vessels, piping and structures including bag houses and the like from overpressures resulting from
• apparatus 20 as illustrated in the drawings is of circular configuration, the principals hereof
• Composite pressure relief apparatus 20 includes a topmost or outermost rupture disc
• Disc 22 in its circular embodiment includes an annular flange 24 generally
• Support members such as 80 and 82 are not a requirement in certain overpressure protection
• An annular, generally planar hold-down member 36 that overlies disc 22 and that is best shown in Fig. 10 has an inner, semi-circular edge 38 defining an interior opening 40 of
• a series of peripherally positioned bolt receiving openings 42 are provided in
• hold-down member 36 which correspond to and are aligned with openings 26 in flange 24 of rupture disc 22.
• a unitary, initially planar segment 44 of hold-down member 36 projects into the opening 40 of hold-down member 36 and has an elongated, rectilinear margin 46 that
• hold-down member 36 is somewhat (e.g. about 55%-60%) greater than the radius of central section 30 of disc 22.
• the bulged portion of central section 30 lies within opening 40 of hold-down member 36 when the latter is positioned in overlying relationship to flange 24 of rupture disc 22.
• transition zone 48 between flange 24 of rupture disc 22 and the bulged portion of central section 30 of disc 22 is located just inside of the semi-circular edge 38 of hold-down member
• bulged disc 22 The bulged portion of central section 30 of disc 22 is formed by bulging the
• central section 30 of disc 22 is of asymmetric configuration as illustrated schematically in
• Fig. 7 The bulged portion of central section 30 of disc 22 is provided with a semi-circular
• line of weakness generally designated 50 and preferably comprised of a series of arcuate
• each of the slits 52 terminates in a circular opening 54
• each slit 52 Adjacent openings 54 are in spaced relationship presenting a web of
• spaced terminal ends 52c and 52d of end slits 52a and 52b define a unitary hinge portion 58
• the margin 46 of segment 44 is located inwardly from an imaginary line between the respective outermost extremities 52c and 52d of line of weakness 52 and therefore the outer extremities of margin 46 intersect end slits 52a and 52b
• segment 44 measured along the dashed section line 6-6 of Fig. 2 for example is approximately one third of the distance from margin 46 to the outer peripheral edge of disc
• the bulged portion of section 30 of disc 22 is formed by bulging a blank disc into the
• portions of the central section 30 of disc 22 is of asymmetric cross-sectional configuration
• disc 22 has a relatively flat portion 60
• apparatus 20 includes a second
• rupture disc 122 which is of identical shape and overall dimensions disc 22, but preferably is constructed of somewhat thicker stainless steel material. Furthermore, an annular clamping member 62 is provided against the underside or innermost side of disc 122.
• bulged portion of the central section 130 of disc 122 has a line of weakness 50, which
• a layer 64 of synthetic material such as Teflon or Mylar is interposed between disc
• Strips 66 and 68 may be adhesively secured to respective opposed surfaces of
• Disc 122 has a hinge portion 158 that is of the same dimensions and is
• annular support ring 262 underlies disc 122 and is of the same shape and
• hold-down member 36 configuration as hold-down member 36, but may be the same or of greater thickness.
• segment 244 of support ring 262 is aligned with and conforms to the shape of segment 44 of hold-down member 36.
• Bolt receiving holes in support ring 262 align with openings 42, 26
• Strips 66 and 68 along with flexible layer 64 close the slits 52 and 152 of each of the bulged portions of central sections 30 and 130 of rupture discs 22 and 122.
• the bulged portion of the central section 130 of rupture disc 122 rests within the
• Ring 72 is preferably spot welded to the underside of the bulged portion of central section and segment 130 of rupture disc 122.
• the semi-circular support ring 72 forming a
• part of apparatus 20 may be formed by bulging a blank disc and then cutting ring 72 from
• 74 may be spot welded to ring 72 on the underside of bulged portion of the central section
• apparatus 320 is the same as apparatus 20 except that the rupture discs 322 and 332 are flat, do not have central bulged sections, and are each provided with a semi-circular circumferentially extending line of weakness 350. Otherwise, the components of apparatus 320 are the same
• annular hold-down member 336 designated by dashed lines, and that is identical to hold-down member 36, overlies the central
• annular hold-down member (not shown) that overlies the peripheral flange portion 324 of disc 322 has an inner opening 338 shown by dashed lines as well as an inwardly extending segment similar to segment 44 of hold-down
• a support ring identical in configuration to support ring 262 may be provided if desired in underlying relationship of the
• the support ring beneath disc 332, if provided, preferably has
• composite explosion protection apparatus 20 and 220 having a pair of
• bulged rupture disc or a single scored flat rupture disc may be provided if deemed to be adequate for protecting a particular piece of equipment, piping, conduits, or structures from
• rupture disc 22 and central section 130 of rupture disc 122 as controlled by the resistance to
• central section 130 ofrupture disc 122 open as a unit as the lines of weakness 50 and 150 tear along the full length thereof including the endmost regions thereof defined by terminal end
• segment 44 being either somewhat arcuate as shown in Fig. 9, or presenting a somewhat more transversely linear inclined surface. In all instances though, the deflected outer portion of segment 44 of hold-down
• sections 30 and 130 ofrupture discs 22 and 122 contributes to prevention of separation of
• margin 46 of segment 44 in spaced relationship from the weakest zone of the
• hinge portions 58 and 158 extending along an imaginary line between the end extremities 52c and 52d of lines of weakness 50 and 150.
• hinge portion 58 and 158, as bend about margin 46 of the deflected part of segment 44 are
• segment 44 of hold-down member 36 as the hinge portions 58 and 158 bend about margin 46, rather than being required to bend along an imaginary line between the end extremities
• Vent apparatus 320 operates in the same manner as vent apparatus 20, except in most
• the central sections ofrupture discs 322 and 332 having flat central sections are not capable of withstanding as high vacuum conditions as is the case with bulged central
• Preferred embodiments of apparatus 20 or 320 may be from about 250 mm in width
• the rupture discs 22 and 322 are preferably fabricated of 0.5 mm stainless steel, and may be from about 0.15 mm to about 1.5 mm in thickness.
• discs 122 and 332 are preferably constructed of 1.2 mm stainless steel and maybe from about 0.8 mm to about 2 mm thick.
• the Teflon layer 64 and Teflon strips 66 and 68 are in each
• each of the slits 52 and 152 are preferably about
• the webs 56 100 mm in length, and may be from about 50 mm to about 150 mm long.
• the webs 56 100 mm in length, and may be from about 50 mm to about 150 mm long.
• each of the lines of weakness 50 and 150 depends upon the overall size of the rupture discs 22 and

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Safety Valves (AREA)
• Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
• Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
• Pressure Vessels And Lids Thereof (AREA)
• Dot-Matrix Printers And Others (AREA)
• Ink Jet (AREA)
• Manufacture Or Reproduction Of Printing Formes (AREA)
• Earth Drilling (AREA)

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Applications Claiming Priority (2)

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• 2003
  • 2003-11-13 US US10/712,179 patent/US7017767B2/en not_active Expired - Lifetime
• 2004
  • 2004-08-03 JP JP2006539464A patent/JP5080085B2/ja not_active Expired - Lifetime
  • 2004-08-03 WO PCT/US2004/025083 patent/WO2005056433A1/en not_active Ceased
  • 2004-08-03 ES ES04779997T patent/ES2357312T3/es not_active Expired - Lifetime
  • 2004-08-03 KR KR1020067011652A patent/KR101104000B1/ko not_active Expired - Fee Related
  • 2004-08-03 BR BRPI0416573-0A patent/BRPI0416573B1/pt active IP Right Grant
  • 2004-08-03 AU AU2004297144A patent/AU2004297144B2/en not_active Ceased
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  • 2004-08-03 CA CA 2543392 patent/CA2543392C/en not_active Expired - Lifetime
• 2006
  • 2006-01-18 US US11/334,226 patent/US7735671B2/en active Active

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