US2531424A - Seal for floating roof tanks - Google Patents

Seal for floating roof tanks Download PDF

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Publication number
US2531424A
US2531424A US630715A US63071545A US2531424A US 2531424 A US2531424 A US 2531424A US 630715 A US630715 A US 630715A US 63071545 A US63071545 A US 63071545A US 2531424 A US2531424 A US 2531424A
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United States
Prior art keywords
roof
seal
shell
sealing member
floating roof
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Expired - Lifetime
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US630715A
Inventor
Fred L Goldsby
Clifford M Orr
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Chicago Bridge and Iron Co
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Chicago Bridge and Iron Co
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Priority to US630715A priority Critical patent/US2531424A/en
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Publication of US2531424A publication Critical patent/US2531424A/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

  • This invention relates to 8 Claims. (Cl. 220-26) and particularly to a seal for sealing the area be-- I tween the floating roofand the shell of the tank.
  • Floating roof tanks are used to store vol atile liquids.
  • the roof floats on top of the stored liquid and rises and falls as the quantity of liquid is increased and decreased. This servesto limit evaporation losses of the liquid, as-therejis very small vapor spaceprovided. g It is necessary in floating roof tanks that me be provided for sealing the area between the edge.
  • Fig. 1 is the frogmentary plan view of a storage tank embodyingably attached to the vertical edge portion of the floating roof by means-"of flat-plates l3 attached to the roof and spaced therefrom. Theseplates have'sloping slots 14 (Fig. 3) to hold the ends l5 of the hanger arms l2. These ends. are bent I 8 are connected by smaller pipes I8 fitted within their ends.
  • the assemblies of pipes l6 and cylindrical sleeves ll and pipes l6 and smaller pipes I8 form continuous holders around. the edge of the roof over which a sealing member I9 may be held.
  • the support is free to expand or contract, and thus adjusts its'elf'to the shape of the shell. Other support .means than that shown and described may be used if desired.
  • the sealing member l9 which is preferably a fabric impregnated with an impervious flexible material, is attached to the edge of the roof by means of, for example, spaced hooks 20 that hold a rod 2
  • the sealing member extends ifromthe edgeof the roof up over the support means at the upper ends of hanger arms l2, and down along the edge of the shell Ill.
  • the shell portion 22 of the sealing member is provided with raised abrasion-resistant bumper strips 23, while the bottom portion 24 of the sealing member ex tends upwardly andis fastened to an annular flange 25 at the edge of the floating roof to form a trough 28.
  • This trough is filled with a mobile weighting material such as a non-volatile nonfreezing oil of preferably higher specific gravity than the stored liquid.
  • a mobile weighting material such as a non-volatile nonfreezing oil of preferably higher specific gravity than the stored liquid.
  • the top surface of the sealing liquid 26 may be above the surface of the stored liquid, or may be level with the stored liquid, but is preferably not below the level of the liquid within the tank.
  • the mobile weighting material may also be a granular material where the granules flow easily over and aroundeach other. 7 a
  • a secondary seal is preferably provided at the topmost portion of the sealing member l9, and
  • secondary seal may be a fabric attached to the-supports by'meansof bolts 28.
  • the slots g I4 are provided so that the ends l5- of the hanger arms [2 may be easily-inserted. If desiredthe slots may be constructed-with a downwardly extending portion t substantially the 1 middle so" that the armwill be held at the bottom of the r downwardly extending portion.
  • each hanger arm 12 there is located a substantially horizontal pipe 16 attached at its midpoint to the hanger arm.
  • the pipes are connected to each other by cylindrical sleeves I! with each end of a sleeve surrounding an end of a pipe 16.
  • the pipes below the secondary sealzl there is provided a -.wide bumper strip 29 in contact with the shell Ill. -I'n order to keep the floating roof centered within the shell there are provided pairs ofupstanding bracket arms 30 spaced around the edge of the roof with wheels 3'! rotatably held at the ends of the bracket arms 30 and in contact with the shell l0.
  • the shell I0 is usually made'eylindri .cal when erected it sometimes gets out of round.
  • the hanger arms 12, being rotatably mounted, will adjust themselves to this out-of-roundness, as
  • a seal for a floating roof tank comprising a plurality of spaced hanger arms rotatably mounted on the side of the roof extending from the edge portion of the floating roof toward the shell of the tank, an annular carrier means supported by the hanger arms, a flexible impervious sealing member attached to the roof and extending from the edge of the roof'over the carrier means, down along the tank shell to a point below the surface of the stored liquid, and up to the rOOf to form an annular trough at the bottom portion of said sealing member, and a weighting material within said annular trough.
  • a seal for a floating roof tank comprising a plurality of spaced hanger arms extending upwardly from the vertical edge portion of the floating root toward the shell of the tank, a continuous annular carrier means attached to the outer ends of the hanger arms, a flexible'impervious sealing member attached to the edge Of the roof above the hanger arms and extending over the carrier means, down along the shell to a point below the surface of the stored liquid, and up to an annular flange attached to the floating roof below the hanger arms to form an annular trough, and a mobile weighting material within said annular trough.
  • a seal for a floating rooi' tank comprising a plurality of spaced hanger arms rotatably mounted on the root and extending upwardly from the vertical edge portion oi the floating root toward the shell of the tank, a plurality of curved telescoping pipe-like sections arranged in the form of an annulus and attached to the outer ends oi the hanger arms, a flexible impervious sealing member attached to the edge of the roof above the hanger arms and extending over the annulus, down along the shell to a point below the surface of the stored liquid and up to an annular flange attached to the floating roof below the hanger arms to form an annular trough, said sealing member having spaced raised bumper strips on the sealing member adapted slidably to contact the shell and including a bumper strip opposite the annulus, and a liquid within said am, ular trough.
  • the seal of claim 5 including a secondary seal supported by the annulus and adapted to contactsaid shell above the sealing member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Description

NW. 2%, WW F. L. GOLDSBY ETAL SEAL FOR FLOATING ROOF TANKS m a 0 1 W Filed Nov. 26, 1945 Patented Nov- I UNI- ao srlrras"v PAr-E ,srm. roa FLOATING noor TANKS Fred L. Goldsby nd Clifford rr,-Chicago,
,Ill., assignors to ChicagoBridge & Iron pany, a corporation of Illinois Com- Application November as, 1945, Serial No.' 630,715;
I f l This invention relates to 8 Claims. (Cl. 220-26) and particularly to a seal for sealing the area be-- I tween the floating roofand the shell of the tank.
Floating roof tanks are used to store vol atile liquids. The roof floats on top of the stored liquid and rises and falls as the quantity of liquid is increased and decreased. This servesto limit evaporation losses of the liquid, as-therejis very small vapor spaceprovided. g It is necessary in floating roof tanks that me be provided for sealing the area between the edge.
of the roof and-the shell of the tank in order to prevent substantial evaporation losses and to prevent contamination of" the stored liquid. We have invented an improved type seal which positively seals this area and provides a substantially gas tight cover for the surface ofthe stored liquid.
The invention will be described'as related. tov the embodiments shown in the accompanying drawings. Of the drawings Fig. 1 is the frogmentary plan view of a storage tank embodyingably attached to the vertical edge portion of the floating roof by means-"of flat-plates l3 attached to the roof and spaced therefrom. Theseplates have'sloping slots 14 (Fig. 3) to hold the ends l5 of the hanger arms l2. These ends. are bent I 8 are connected by smaller pipes I8 fitted within their ends. The assemblies of pipes l6 and cylindrical sleeves ll and pipes l6 and smaller pipes I8 form continuous holders around. the edge of the roof over which a sealing member I9 may be held. The support is free to expand or contract, and thus adjusts its'elf'to the shape of the shell. Other support .means than that shown and described may be used if desired.
The sealing member l9, which is preferably a fabric impregnated with an impervious flexible material, is attached to the edge of the roof by means of, for example, spaced hooks 20 that hold a rod 2| in sealing'contact with the edge of the sealing member. The sealing member extends ifromthe edgeof the roof up over the support means at the upper ends of hanger arms l2, and down along the edge of the shell Ill. The shell portion 22 of the sealing member is provided with raised abrasion-resistant bumper strips 23, while the bottom portion 24 of the sealing member ex tends upwardly andis fastened to an annular flange 25 at the edge of the floating roof to form a trough 28. This trough is filled with a mobile weighting material such as a non-volatile nonfreezing oil of preferably higher specific gravity than the stored liquid. The top surface of the sealing liquid 26 may be above the surface of the stored liquid, or may be level with the stored liquid, but is preferably not below the level of the liquid within the tank. The mobile weighting material may also be a granular material where the granules flow easily over and aroundeach other. 7 a
A secondary seal is preferably provided at the topmost portion of the sealing member l9, and
this, secondary seal may be a fabric attached to the-supports by'meansof bolts 28. Immediately substantially at right angles to'the. main body portion of the vhanger'arms, and are arranged in this manner so that the hanger armsv may. rotate outwardly away from the roof. The slots g I4 are provided so that the ends l5- of the hanger arms [2 may be easily-inserted. If desiredthe slots may be constructed-with a downwardly extending portion t substantially the 1 middle so" that the armwill be held at the bottom of the r downwardly extending portion.
At the top end of each hanger arm 12 there is located a substantially horizontal pipe 16 attached at its midpoint to the hanger arm. In the embodiment shown in Fig. 1' the pipes are connected to each other by cylindrical sleeves I! with each end of a sleeve surrounding an end of a pipe 16. In the embodiment shown inFig. 4 the pipes below the secondary sealzl there is provided a -.wide bumper strip 29 in contact with the shell Ill. -I'n order to keep the floating roof centered within the shell there are provided pairs ofupstanding bracket arms 30 spaced around the edge of the roof with wheels 3'! rotatably held at the ends of the bracket arms 30 and in contact with the shell l0.
Although the shell I0 is usually made'eylindri .cal when erected it sometimes gets out of round.
The hanger arms 12, being rotatably mounted, will adjust themselves to this out-of-roundness, as
. shown indotted lines in Fig. 3.
Having described our invention as related to a typical embodiments of the same, it is ourintention that the invention be not limited by any of the details of description unless otherwise speci- NT OFFICE- fled, but rather be construed broadly within its spirit and scope as set out in the accompanying claims.
We claim:
1. A seal for a floating roof tank comprising a plurality of spaced hanger arms rotatably mounted on the side of the roof extending from the edge portion of the floating roof toward the shell of the tank, an annular carrier means supported by the hanger arms, a flexible impervious sealing member attached to the roof and extending from the edge of the roof'over the carrier means, down along the tank shell to a point below the surface of the stored liquid, and up to the rOOf to form an annular trough at the bottom portion of said sealing member, and a weighting material within said annular trough.
2, The seal of claim 1 wherein the bottom edge of the flexible sealing member is held away from the roof by an annular flange attached to the edge of the roof.
3. A seal for a floating roof tank comprising a plurality of spaced hanger arms extending upwardly from the vertical edge portion of the floating root toward the shell of the tank, a continuous annular carrier means attached to the outer ends of the hanger arms, a flexible'impervious sealing member attached to the edge Of the roof above the hanger arms and extending over the carrier means, down along the shell to a point below the surface of the stored liquid, and up to an annular flange attached to the floating roof below the hanger arms to form an annular trough, and a mobile weighting material within said annular trough.
4. The seal of claim 3 wherein a raised bumper strip is provided on the shell side of the sealing member opposite the carrier means and adapted slidably to contact said shell? v 5. A seal for a floating rooi' tank comprising a plurality of spaced hanger arms rotatably mounted on the root and extending upwardly from the vertical edge portion oi the floating root toward the shell of the tank, a plurality of curved telescoping pipe-like sections arranged in the form of an annulus and attached to the outer ends oi the hanger arms, a flexible impervious sealing member attached to the edge of the roof above the hanger arms and extending over the annulus, down along the shell to a point below the surface of the stored liquid and up to an annular flange attached to the floating roof below the hanger arms to form an annular trough, said sealing member having spaced raised bumper strips on the sealing member adapted slidably to contact the shell and including a bumper strip opposite the annulus, and a liquid within said am, ular trough.
6. The seal of claim 5 including a secondary seal supported by the annulus and adapted to contactsaid shell above the sealing member.
FRED L. GOLDSBY. CLIFFORD M. ORR.
REFERENCES CITED The following references are of record in the tile oi this patent:
UNITED STATES PATENTS Number Name Date 1,493,344 Huif May 6, 1924 1,660,021 Wiggins Feb. 21, 1928 1,668,792 Wiggins May 8, 1928 2,036,372 Stough Apr. 7, 1936 2,085,752 Horton et a1 July 6, 1937 2,089,645 Dickmann Aug. 10, 1937 2,297,985 Rivers Oct. 6, 1942 FOREIGN PATENTS Number Country Date 94,546 Switzerland May 1, 1922 290,443 Germany Sept. 25, 1913
US630715A 1945-11-26 1945-11-26 Seal for floating roof tanks Expired - Lifetime US2531424A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647654A (en) * 1950-07-03 1953-08-04 Cibulka Alois Floating roof for tanks
US2846108A (en) * 1954-10-07 1958-08-05 Southwest Welding & Mfg Compan Floating roof anti-turning device
US2968420A (en) * 1957-06-13 1961-01-17 Chicago Bridge & Iron Co Fabric type seal for floating roof tank
US2991901A (en) * 1959-07-10 1961-07-11 John H Wiggins Hydraulically actuated fabric seal with pull-down and push-out mechanism
US3054526A (en) * 1959-04-25 1962-09-18 Mercier Maurice Fluid-tight packing for floating-rooftype hydrocarbon tanks
US3059806A (en) * 1959-10-12 1962-10-23 Ii William E Joor Floating roof tank seal
US3059805A (en) * 1959-05-25 1962-10-23 Ii William E Joor Sealing means for floating roof tanks
US3338454A (en) * 1964-02-24 1967-08-29 Dorcon Inc Secondary seal for floating roof tanks
US3375951A (en) * 1965-06-24 1968-04-02 Barnes Mfg Co Tank wafer
FR2337674A1 (en) * 1976-01-09 1977-08-05 Strozzi Luigi AUTOMATIC WATERPROOF CLOSING DEVICE FOR CONTAINERS CONTAINING VOLATILE LIQUIDS OR COULD BE DAMAGED
US4071164A (en) * 1976-06-14 1978-01-31 Mikhail Grigorievich Skakunov Floating roof of a tank for storing liquids
US4341323A (en) * 1981-03-10 1982-07-27 Mobil Oil Corporation Seal for floating roof tanks
US11548725B2 (en) 2013-03-15 2023-01-10 Industrial & Environmental Concepts, Inc. Cover systems, tank covering methods, and pipe retention systems

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE290443C (en) *
CH94546A (en) * 1920-12-23 1922-05-01 Bbc Brown Boveri & Cie Edge sealing on partition walls in oil-filled vessels for electrical apparatus.
US1493344A (en) * 1921-03-12 1924-05-06 Huff Wilson Sylvester Apparatus for disposing water in fireproof tanks
US1660021A (en) * 1926-02-15 1928-02-21 John H Wiggins Liquid-storage tank
US1668792A (en) * 1926-08-30 1928-05-08 John H Wiggins Liquid-storage tank
US2036372A (en) * 1930-08-01 1936-04-07 Stough Tank Erecting Company Floating deck for oil storage tanks
US2085752A (en) * 1935-05-18 1937-07-06 Chicago Bridge & Iron Co Container
US2089645A (en) * 1934-12-13 1937-08-10 Mcclintic Marshall Corp Liquid storage tank
US2297985A (en) * 1939-04-08 1942-10-06 Rivers George Floating roof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE290443C (en) *
CH94546A (en) * 1920-12-23 1922-05-01 Bbc Brown Boveri & Cie Edge sealing on partition walls in oil-filled vessels for electrical apparatus.
US1493344A (en) * 1921-03-12 1924-05-06 Huff Wilson Sylvester Apparatus for disposing water in fireproof tanks
US1660021A (en) * 1926-02-15 1928-02-21 John H Wiggins Liquid-storage tank
US1668792A (en) * 1926-08-30 1928-05-08 John H Wiggins Liquid-storage tank
US2036372A (en) * 1930-08-01 1936-04-07 Stough Tank Erecting Company Floating deck for oil storage tanks
US2089645A (en) * 1934-12-13 1937-08-10 Mcclintic Marshall Corp Liquid storage tank
US2085752A (en) * 1935-05-18 1937-07-06 Chicago Bridge & Iron Co Container
US2297985A (en) * 1939-04-08 1942-10-06 Rivers George Floating roof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647654A (en) * 1950-07-03 1953-08-04 Cibulka Alois Floating roof for tanks
US2846108A (en) * 1954-10-07 1958-08-05 Southwest Welding & Mfg Compan Floating roof anti-turning device
US2968420A (en) * 1957-06-13 1961-01-17 Chicago Bridge & Iron Co Fabric type seal for floating roof tank
US3054526A (en) * 1959-04-25 1962-09-18 Mercier Maurice Fluid-tight packing for floating-rooftype hydrocarbon tanks
US3059805A (en) * 1959-05-25 1962-10-23 Ii William E Joor Sealing means for floating roof tanks
US2991901A (en) * 1959-07-10 1961-07-11 John H Wiggins Hydraulically actuated fabric seal with pull-down and push-out mechanism
US3059806A (en) * 1959-10-12 1962-10-23 Ii William E Joor Floating roof tank seal
US3338454A (en) * 1964-02-24 1967-08-29 Dorcon Inc Secondary seal for floating roof tanks
US3375951A (en) * 1965-06-24 1968-04-02 Barnes Mfg Co Tank wafer
FR2337674A1 (en) * 1976-01-09 1977-08-05 Strozzi Luigi AUTOMATIC WATERPROOF CLOSING DEVICE FOR CONTAINERS CONTAINING VOLATILE LIQUIDS OR COULD BE DAMAGED
US4071164A (en) * 1976-06-14 1978-01-31 Mikhail Grigorievich Skakunov Floating roof of a tank for storing liquids
US4341323A (en) * 1981-03-10 1982-07-27 Mobil Oil Corporation Seal for floating roof tanks
US11548725B2 (en) 2013-03-15 2023-01-10 Industrial & Environmental Concepts, Inc. Cover systems, tank covering methods, and pipe retention systems

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