US3565279A - Floating roof tank seal means - Google Patents

Floating roof tank seal means Download PDF

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Publication number
US3565279A
US3565279A US771588A US3565279DA US3565279A US 3565279 A US3565279 A US 3565279A US 771588 A US771588 A US 771588A US 3565279D A US3565279D A US 3565279DA US 3565279 A US3565279 A US 3565279A
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United States
Prior art keywords
shoes
roof
tank
secured
sealing means
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US771588A
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English (en)
Inventor
William E Joor
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US Industries Inc
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US Industries Inc
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Publication date
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Publication of US3565279A publication Critical patent/US3565279A/en
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    • 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
    • B65D88/00—Large containers
    • B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
    • B65D88/42—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle
    • B65D88/46—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle with mechanical means acting on the seal

Definitions

  • ABSTRACT A seal for a floating roof tank comprising a mu]- tiplicity of independent shoes arranged circumferentially about the tank shell and supported and biased against the shell by spring straps secured to the roof and extending therefrom radially outwardly and upwardly and downwardly therefrom and pivotally secured to the upper portions of the shoes.
  • Flexible seal curtain means traverse the space between the upper portions of the shoes and the roof.
  • the shoes preferably, embody resilient, relatively thin pads in flexible envelopes which bear against the tank shell to accommodate irregularities therein.
  • An object of the present invention is to provide novel efficient and rugged support and biasing means for the seal shoes.
  • Another object is to provide seal shoe means embodying a multiplicity of independent shoes each consisting of rigid backing and a resilient facing comprising packing of cellular or other resilient material maintained in a fluidtight and abrasive-resistant envelope.
  • a multiplicity of independent seal shoes are supported and biased against the inner face of the tank shell by spring strap members secured to the periphery of the roof and extending radially outwardly and upwardly and downwardly therefrom and pivotally secured to the upper portions of the shoes.
  • Seal curtains extend across the annular clearance space between the upper portions of the shoes and the top of the roof.
  • the independent shoes embody relatively thin packings of expanded or other cellular resilient material within an envelope of flexible sheeting for hearing against the tank shell face and for accommodating irregularities therein.
  • FIG. 1 is a perspective view showing a portion of a floatin roof tank and seal means embodying an exemplary form of the invention, portions being broken away and sectioned.
  • FIG. 1a is an elevation view showing part of the inside of the tank wall and a modified seal.
  • FIG. 2 is an enlarged detail vertical transverse section taken substantially on line 2-2 of FIG. 1.
  • FIG. 3 is a vertical transverse radial section taken on line DESCRIPTION OF THE PREFERRED EMBODIMENT
  • a large circular tank shell 12 having a wind girder l3 projecting outwardly adjacent the upper edge thereof.
  • a floating roof including a peripheral pontoon portion 14 and an intermediate pan portion 15 is loosely received within the tank for floating on the liquid therein.
  • a support column is shown at 16 to limit approach of the roof to tank floor 17.
  • Seal shoe structure extends entirely around the inner face of shell 12 abreast peripheral wall 19 of the roof.
  • This seal shoe consists of an envelope 20 of flexible, abrasive-resistant, fluidtight sheeting, as nylon cloth, impregnated with polyurethane.
  • the envelope may be continuous around the tank and encloses cellular resilient material 21 which, likewise, may be continuous. Material 21 may be expanded polyurethane foam or the like.
  • Extending along the inner upper edge of the shoe envelope are a plurality of thin but rigid strap bars 23, 24, etc., spaced at their ends, as at 25,
  • Shoe structure 18 is supported and outwardly biased by means of generally vertically disposed spring strap members, as at 30, each having a vertical inner leg 31 rigidly secured to peripheral roof wall 19 by meansof bolts or rivets 32, and a radially outwardly and upwardly inclined outer leg 33 connected to inner leg 31 by means of a resilient loop 34.
  • Each outer leg 33 (FIG. 8) has a curved, upper extremity 35 with an aperture loosely received upon one of the bolts 28 and between an inner plate 37 and an outer nut 38 thereon. Accordingly, the attachment of support leg 33 to the upper portion of the shoe structure may pivot or rock as the shoe structure is distorted radially due to irregularities in the tank shell face.
  • Pairs of preferably metal straps 40 and 41 are pivotally supported by and depend from thebolts 27 projecting inwardly from reinforcing bars 23 and 24. These straps depend along the inner face of shoe structure 18 and are secured at their lower extremities to a weighted'crossbar 45 which extends through a loop 46 formed at the lower edge of sheeting envelope 20. Due to the reduced thickness of the upper edge portion 47 of the shoe structure and the inward disposition of weight bar 45, this bar acts eccentrically in the mannerof a pendulum to bias the shoe structure along its entire depth against the inner face of the tank shell.
  • FIGS. 1a, 3, 4, and 5 embodies a plurality of independent shoe members, as at 50 and 51.
  • Each shoe member comprises a thin metal backing plate 52 or 53 and a sheet of fluidtight, flexible material 54 or 55* with top edges secured to the plates by bolts 56 and bottom edges folded upon themselves as at 57 to form a flap 58 inserted between backing plate 52 and padding 66 and secured to the backing plate by bolts 59 and 60.
  • Sheet attaching bolts 56 at the upper edge of the backing plate also secure thereto the upper edge of a flexible seal curtain 62 which traverses the clearance between peripheral wall 63 of the roof and the upper edge portions of the shoe members-The curtain is secured to an angle bar 64 at the upper comer of the roof by means of bolts 65.
  • Flexible sheeting 54, together with backing plate 52 of each shoe struc' ture forms a fluidtight envelope which is internally packed with a suitable resilient or cellular material 66, such as expanded polyurethane foam or the like.
  • Each shoe member is supported and biased against the inner face of tank shell '67 by means of one or more circumferentially spaced, vertically-disposed leaf or strap springs 68 intermediately secured to roof peripheral wall 63 by boltsor rivets 69.
  • the upper part of each spring strap member extends radially outwardly and upwardly and downwardly from the roof and is pivotally or rockingly secured to the upper edge portion of one of the shoe members, in the same manner as shown in FIG. 8, by means of a stud 70 loosely receiving the curved extremity 71 of the spring member which is secured in position by a nut 72.
  • each spring strap member extends radially outwardly and downwardly from the roof and has a curved, lower extremity 73 slidably bearing against the lower portion of the shoe member, the spring strap cooperating with the rigid backing plate 52 to bias the resilient outer surface of the shoe member against the tank shell with envelope sheeting 54 in rubbing contact therewith.
  • each shoe member 50, 51 comprises a polyurethane foam pad of approximately l /zinches thickness and is approximately 8 feet in circumferential dimension and 2 feet 4 inches in height. Since these shoes will be used in tanks varying widely in diameter--for instance, from 40 to 250 feetshoes of alternative lengths will be provided for use with assemblies of standard shoes to complete encirclement of the tank.
  • FIG. 5 illustrates in section a joint between abutting longitudinal edges of a pair of adjacent shoe members 50 and 51.
  • a piece of flexible envelope fabric 75 is inserted between polyurethane packing 66 and the inner face of backing plate 52 and is secured thereto by bolts, as at 76.
  • the outer edge of piece 75 overlies and is secured by bolts 77a to the corresponding edge of envelope sheeting 54, and the two pieces of sheeting are feathered as shown to form an inclined edge 78.
  • the flexible envelope sheeting 55 of the adjacent shoe member 51 is similarly secured by bolts, as at 79, to the edge of a sheeting strip 80 which is inserted between polyurethane packing 54a and backing plate 53, the feathering of this part being complementary to the feathered part formed between sheeting pieces 54 and 75 of the adjacent shoe member to form an inclined edge 81 which abuts edge 78.
  • Backing plates 52 and 53 may overlap at their juncture, as at 82, and the assembly thereof is resiliently maintained by a spring strip 83 of double-U configuration which is secured to the shoe members by previously-mentioned bolts 76 and 77.
  • a substantially fluidtight joint is provided between the abutting shoe members, yet these members including the backing plate portions thereof are free to work to accommodate irregularities in the face of the tank shell.
  • FIGS. 6 and 7 show a modified form of shoe supported and biased by vertically disposed spring 'strap members 85 of generally bow-shaped configuration, as in the previous form.
  • Each of the independent shoes is formed of a relatively thin metal plate as 86 or 91 provided along its upper and lower edges with inwardly inclined lips 87 and 88 which enable the shoe to ride over irregularities in the inner face of the tank shell 89.
  • FIG. 9 is a detail horizontal cross section illustrating a joint between adjacent shoe plates, as 86 and 91, and showing a spring strap 92 of double-U configuration as in FIG. 5, secured to the shoe plates by bolts 93.
  • seal curtain 94 is secured to the top edges'of shoe plates 86, 91, etc., by bolts 95 and pressure plates 96.
  • at least a pair of the vertical strap springs 85 may be utilized to support and bias each shoe, but this number will depend upon the circumferential expanse of the shoe, which may be similar to that of the shoes in FIGS. 3, 4, and 5.
  • seal means in said space comprising a plurality of shoes arranged circumferentially about and with faces sealingly and slidably abutting the inner face of said shell, pliable sealing means extending continuously around said space and traversing the same radially between the upper portions of said shoes and said roof, additional sealing means nonrigidly connecting the adjacent ends of said shoes, and vertically disposed, generally bow-shaped spring straps with their center portions secured to the periphery of said roof and extending radially outwardly and upwardly and downwardly therefrom, the upper portions of said straps being rockingly secured to said shoes adjacent said upper portions thereof and beneath said pliable sealing means and the lower portions of said straps slidably abutting the inner faces of said shoes for resiliently supporting said shoes and said sealing means relative to said roof and biasing sa d shoes against the inner face of said tank shell.
  • seal means in said space comprising a plurality of shoes arranged circumferentially about and with faces sealingly and slidably abutting the inner face of said shell, pliable sealing means extending continuously around said space and traversing the same radially between the upper portions of said shoes and said roof, additional sealing means nonrigidly connecting the adjacent ends of said shoes, and vertically disposed spring straps secured to the periphery of said roof and extending radially outwardly and upwardly therefrom and pivotally secured to said shoes adjacent said upper portions thereof and beneath said pliable sealing means for resiliently supporting said shoes and said sealing means relative to said roof and biasing said shoes against the inner face of said tank shell, each of said shoes comprising a form-sustaining backing plate, a sheet of pliable, fluidtight material sealingly secured at its edges to the outer face of said plate for bearing against the inner face of said tank shell, and a packing of resilient material between said plate and said sheet for accommodating irregularities in the
  • seal means as described in claim 2 further including tensionally resilient spring means bridging the joints between adjacent shoes for maintaining the alignment thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Building Environments (AREA)
US771588A 1968-10-29 1968-10-29 Floating roof tank seal means Expired - Lifetime US3565279A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77158868A 1968-10-29 1968-10-29

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US3565279A true US3565279A (en) 1971-02-23

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US771588A Expired - Lifetime US3565279A (en) 1968-10-29 1968-10-29 Floating roof tank seal means

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US (1) US3565279A (enrdf_load_stackoverflow)
DE (1) DE1902313A1 (enrdf_load_stackoverflow)
FR (1) FR2021767A1 (enrdf_load_stackoverflow)
GB (1) GB1229752A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900127A (en) * 1972-12-06 1975-08-19 Voest Ag Sealing assembly in tank
US4154358A (en) * 1975-12-17 1979-05-15 Greengate Industrial Polymers Limited Liquid storage tank with sliding roof seal
US4162022A (en) * 1978-06-05 1979-07-24 Fox William M Closurer and method for sealing a floating tank roof
US4353478A (en) * 1979-08-21 1982-10-12 Clark William F Vapor seal for floating roof tank
US4524878A (en) * 1983-04-14 1985-06-25 Ingenieurburo Imhof Gmbh Assembly for sealing an annular gap between the wall of a large vessel and a floating cover
US5284269A (en) * 1993-06-28 1994-02-08 Petrie Jack G Space saving double seal
US6247607B1 (en) * 1998-12-18 2001-06-19 Hmt Inc. Low profile secondary seal
EP1234784A1 (de) 2001-02-21 2002-08-28 Ingenieurbüro Imhof GmbH Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer Schwimmdecke
US20150047462A1 (en) * 2013-08-16 2015-02-19 Electro-Motive Diesel, Inc. Pinion seal for traction motor gear case
EP2966010A1 (de) 2014-07-07 2016-01-13 Heinrich Imhof Dichtungsanordnung für den Ringspalt zwischen der Behälterwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer Außenwand einer schwimmenden Abdeckung
US11548725B2 (en) 2013-03-15 2023-01-10 Industrial & Environmental Concepts, Inc. Cover systems, tank covering methods, and pipe retention systems

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3418131A1 (de) * 1984-05-16 1985-11-21 Carl Spaeter Gmbh, 2000 Hamburg Sekundaerdichtung fuer schwimmdachtanks
GB8425321D0 (en) * 1984-10-06 1984-11-14 Petroleum Seals & Systems Ltd Seal for floating roof tank
DE59607357D1 (de) * 1995-12-27 2001-08-30 Heinrich Imhof Dichtungsanordnung für den Ringspalt zwischen einer Behälterwand und einem Schwimmdach eines Flüssigkeitsbehälters

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1819401A (en) * 1928-12-22 1931-08-18 Chicago Bridge & Iron Co Floating roof
US1900904A (en) * 1929-04-18 1933-03-14 Johns Manville Flexible wear-resisting sealing fabric and method of making the same
US1913643A (en) * 1929-02-13 1933-06-13 Western Pipe & Steel Co Floating deck for oil tanks
US2478422A (en) * 1946-10-24 1949-08-09 Hammond Iron Works Seal for floating tank covers
US2576136A (en) * 1947-03-05 1951-11-27 Chicago Bridge & Iron Co Support for a seal for a floating roof
US2737310A (en) * 1953-01-15 1956-03-06 Graver Tank & Mfg Co Inc Floating roof
US2803371A (en) * 1954-07-22 1957-08-20 Southwest Welding & Mfg Compan Floating roof seal construction
AT224556B (enrdf_load_stackoverflow) * 1959-11-19 1962-11-26 Firma Aug. Kloenne
US3119510A (en) * 1960-11-21 1964-01-28 John H Wiggins Sealing mechanisms for floating roofs for storage tanks
US3185335A (en) * 1961-11-24 1965-05-25 Levivier Sa Des Ets Sealing means for a liquid-storing reservoir having a floating roof
US3325041A (en) * 1964-09-14 1967-06-13 John H Wiggins Laminated seal structure for storage tanks employing floating roofs

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1819401A (en) * 1928-12-22 1931-08-18 Chicago Bridge & Iron Co Floating roof
US1913643A (en) * 1929-02-13 1933-06-13 Western Pipe & Steel Co Floating deck for oil tanks
US1900904A (en) * 1929-04-18 1933-03-14 Johns Manville Flexible wear-resisting sealing fabric and method of making the same
US2478422A (en) * 1946-10-24 1949-08-09 Hammond Iron Works Seal for floating tank covers
US2576136A (en) * 1947-03-05 1951-11-27 Chicago Bridge & Iron Co Support for a seal for a floating roof
US2737310A (en) * 1953-01-15 1956-03-06 Graver Tank & Mfg Co Inc Floating roof
US2803371A (en) * 1954-07-22 1957-08-20 Southwest Welding & Mfg Compan Floating roof seal construction
AT224556B (enrdf_load_stackoverflow) * 1959-11-19 1962-11-26 Firma Aug. Kloenne
US3119510A (en) * 1960-11-21 1964-01-28 John H Wiggins Sealing mechanisms for floating roofs for storage tanks
US3185335A (en) * 1961-11-24 1965-05-25 Levivier Sa Des Ets Sealing means for a liquid-storing reservoir having a floating roof
US3325041A (en) * 1964-09-14 1967-06-13 John H Wiggins Laminated seal structure for storage tanks employing floating roofs

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900127A (en) * 1972-12-06 1975-08-19 Voest Ag Sealing assembly in tank
US4154358A (en) * 1975-12-17 1979-05-15 Greengate Industrial Polymers Limited Liquid storage tank with sliding roof seal
US4162022A (en) * 1978-06-05 1979-07-24 Fox William M Closurer and method for sealing a floating tank roof
US4353478A (en) * 1979-08-21 1982-10-12 Clark William F Vapor seal for floating roof tank
US4524878A (en) * 1983-04-14 1985-06-25 Ingenieurburo Imhof Gmbh Assembly for sealing an annular gap between the wall of a large vessel and a floating cover
EP0122591A3 (en) * 1983-04-14 1986-02-19 Ingenieurburo Imhof Gmbh Sealing device for the annular space between a container wall and the floating roof of a large storage container
US5284269A (en) * 1993-06-28 1994-02-08 Petrie Jack G Space saving double seal
US6247607B1 (en) * 1998-12-18 2001-06-19 Hmt Inc. Low profile secondary seal
EP1234784A1 (de) 2001-02-21 2002-08-28 Ingenieurbüro Imhof GmbH Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer Schwimmdecke
US11548725B2 (en) 2013-03-15 2023-01-10 Industrial & Environmental Concepts, Inc. Cover systems, tank covering methods, and pipe retention systems
US20150047462A1 (en) * 2013-08-16 2015-02-19 Electro-Motive Diesel, Inc. Pinion seal for traction motor gear case
US9605760B2 (en) * 2013-08-16 2017-03-28 Electro-Motive Diesel, Inc. Pinion seal for traction motor gear case
EP2966010A1 (de) 2014-07-07 2016-01-13 Heinrich Imhof Dichtungsanordnung für den Ringspalt zwischen der Behälterwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer Außenwand einer schwimmenden Abdeckung

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DE1902313A1 (de) 1970-07-16
GB1229752A (enrdf_load_stackoverflow) 1971-04-28
FR2021767A1 (enrdf_load_stackoverflow) 1970-07-24

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