US3595432A - Floating roof for a tank - Google Patents

Floating roof for a tank Download PDF

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Publication number
US3595432A
US3595432A US822230A US3595432DA US3595432A US 3595432 A US3595432 A US 3595432A US 822230 A US822230 A US 822230A US 3595432D A US3595432D A US 3595432DA US 3595432 A US3595432 A US 3595432A
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US
United States
Prior art keywords
floating roof
peripheral wall
bar
spring
guiding
Prior art date
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
Application number
US822230A
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English (en)
Inventor
Martinus Van Der Heijden
Teunis H De Bruijn
Johannes De Wit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell USA Inc
Original Assignee
Shell Oil Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shell Oil Co filed Critical Shell Oil Co
Application granted granted Critical
Publication of US3595432A publication Critical patent/US3595432A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

  • a floating roof comprising a mechanism for forcing a guiding shoe against the inner surface of a tank wall, a gutter at the lower part of the peripheral wall of the floating roof, and a flexible sealing strip connected to the peripheral wall of the gutter and to the guiding shoe.
  • the floating roof comprises a mechanism for forcing a guiding shoe against the inner surface of a tank wall, av gutter at the lower part of the peripheral wall of the floating roof,,and a flexible sealing strip connected to the peripheral wall of the gutter and to the guiding shoe.
  • the said floating roof is further characterized in that the mechanism for forcing the guiding shoes against the inner surface of the tank wall comprises a first bar of which one end is rotatably connected to the upper part of the guiding shoe and the other end is rotatably and slidably connected to the lower part of the peripheral wall of the floating roof, a second bar of which one end is rotatably connected to the upper part of the peripheral wall of the floating roof and the other end is rotatably connected to the first bar, and a spring of which the first end is connected to that end of the first bar which is rotatably and slidably connected to the peripheral wall of the floating roof, the second end of the spring being connected to the peripheral wall of the floating roof.
  • a further attractive embodiment of the floating roof according to the invention is particularly suitable for use in tanks, wherein the distance between the tank wall and the peripheral wall of the floating roof has to be relatively large. Such a relatively large distance has to be present in tanks which are not purely cylindrical. This may be caused for example, by limitations in the precision achieved during construction or by distortion during a settling of the foundation.
  • said embodiment is according to the invention characterized in that the lower part of the said first bar is curved away from the peripheral wall of the gutter, wherein preferably the first end of the spring is connected to the end of the first bar via an arm which is rigidly secured to the first bar.
  • FIG. 1 is a side view of a vertical crosssection ofa fragment of an embodiment of the floating roof of the invention adjacent to the tank wall;
  • FIG. 2 is a side view similar to that shown in FIG. I, but disclosing a vapor outlet forthe vapor space present below the flexible sealing strip; a
  • FIG. 3 is a side view of a vertical cross section ofa fragment of the floating roof of a modified embodiment of the invention.
  • FIG. 4 is a side view of still another modified embodiment of the present invention.
  • the tank wall is designated by the numeral 1 and the floating roof, which is of the usual box-shape, by the numeral 2.
  • a guiding shoe 3 is pressed against the inner surface of the tank wall 1 by a mechanism comprising a first bar 5 and a second bar 6.
  • One end of the bar 5 is rotatably connected to the upper part of the guiding shoe 3, by means of a pivotal connection indicated by the numeral 9.
  • the outer end of the bar 5 is rotatably or pivotally connected to the roof 2 so as to be capable of sliding in a vertical direction.
  • the relevant pivotal connection is free to move in a vertical direction owing to the presence of a guide 11.
  • the center of the bar 5 is provided with a pivot pin 12 to which the bar 6 is rotatably connected.
  • the bar 6 is preferably half, or about half, the length of the bar 5.
  • the bar 6 is rotatably connected to the upper part of the peripheral wall 16 of the roof 2.
  • a tension spring 7 is connected with one end to the bar 5 at 10 and with its other end to the upper partof the periphery ofthe floating roof 2 at 13.
  • the bottom 14 of the roof 2 extends radially beyond the 14 is indicated by the numeral 17; the end of the extension 17 being provided with a vertical wall l8, In this way a gutter 20 is formed by the parts I6, 17 and I8.
  • This gutter 20 is preferably so dimensioned that workni'en are able to walk along it and carry out assembly, inspection or maintenance work. i
  • a flexible rubber sealing strip 21 is connected to the end of the wall 18 and is further connected to the guiding shoe 3 so as to form a gastight seal. This strip 21 is spaced from the level 22 of the liquid in the tank, so that a small vapor space 23 is formed.
  • a tensioning screw 28 is operatively connected at the top end of the spring 7 in order to tension the spring 7 properly.
  • a stop member 27 is present.
  • FIG. 2 differs from FIG. I mainly by the arrangement of a vapor outlet 29 for venting vapor from the vapor space 23 to the atmosphere.
  • This vapor outlet 29 is provided at its top end with a suitable cap 31 containing a conventional waterlock.
  • an electrical connection in the form of a flexible cable (not shown) is operatively connected between the top part of the guiding shoe and the top surface of the floating roof, having the purpose of carrying off static electricity from the floating roof.
  • FIGS. 3 and 4 are particularly suitable for use in tanks, wherein the distance between the tank wall and the peripheral wall of the floating roof has to be relatively large.
  • the tank wall is designated by 40 and the floating roof by 41.
  • a guiding shoe 42 is pressed against the tank wall 40 by mechanism.comprising a first metal bar 43 and a second metal bar 44.
  • One end of the first bar 43 is rotatably connected to the upper part of the guiding shoe 42, by means of a pivotal connection indicated by the numeral 48.
  • the other end of the bar 43 is rotatably connected to the floating roof4l and to the roof4l so as to be capable of sliding in a vertical direction.
  • the relevant pivotal connection 45 is free to move in vertical direction due to the operative engagement with a guide 46.
  • the center of the bar 43 is provided with a pivot pin 47 to which the bar 44 is rotatably connected.
  • the bar 44 is preferably half, or about half, the length of the bar43.
  • the bar 44 is connected to the upper part of the periphery of the floating roof 41 by means of a pivotal connection 49.
  • a tension spring 50 is connected with one end to the upper part of the periphery of the floating roof 41.
  • the other end ofthe tension spring 50 is rotatably secured at 51 to the free end of an arm 52, the latter being rigidly secured to the bar 43.
  • the bottom 53 of the roof 41 extends radially beyond the peripheral wall 54 of the floating roof41.
  • the extension of the bottom 53 is indicated by the numeral 55.
  • a vertical wall 56 is secured to the end of the extension 55, so that gutter 57 is formed by the parts 54, 55, 56.
  • This gutter 57 is preferably so dimensioned that workmen are able to walk along it and carry out assembly, inspection or maintenance work.
  • a sealing strip 58 of a suitable flexible material, such as for example rubber, is connected to the end of the wall 56 and is further connected to the guiding shoe 42 so as to form a gastight seal.
  • the sealing strip 58 is spaced from the level 59 of the liquid in the tank, so that a small vapor space 60 is formed.
  • a weather plate 62 rests freely on the top surface of the roof 41 and is connected to the guiding shoe 42 by a hinge, which is in the form of a strip of flexible material 63, for example of rubber.
  • a chain-dotted line 64 indicates the imaginary connection between the pivots 45 and 48.
  • the lower part of the bar 43 which is indicated by the numeral 65, is slightly curved. This feature, together with the arm 52 to which the spring 50 is secured, as indicated, makes this embodiment very suitable for use with floating roofs and tanks whereby the distance between the tank wall and the peripheral wall of the roof has to be relatively large. Such a large distance is necessary when relatively large defonnations of the tank wall can be expected during use of the tank.
  • the embodiment of the invention according to FIG. 4 is largely similar to the embodiment according to FIG. 3. Consequently. the same elements are indicated by the same reference numerals as in FIG. 3.
  • the difference of the embodimeht according to FIG. 4 as compared with that according to FIG. 3, is that the tension spring is differently arranged. At the free end 70 of an arm 71, rigidly secured to the bar 43, one end of tension spring 72 is rotatably secured. The other end of the tension spring 72 is rotatably secured at 73 to the lower part of the peripheral wall 54 of the floating roof 4!.
  • the embodiment according to H0. 4 is, just like the embodiment according to FIG. 3, particularly suitable for use in tanks whereby the distance between the tank wall and the peripheral wall of the floating roof has to be relatively large.
  • a floating roof for a tank provided at its periphery with guiding shoes adapted to slidably contact the inner surface of the tank wall, comprising:
  • a flexible sealing strip connected to the peripheral wall of the gutter and to the guiding shoe;
  • a mechanism for forcing the guiding shoes against the inner surface of the tank wall including a first bar having one end rotatably connected to the upper part of the guiding shoe and the other end rotatably and slidably connected to the lower part of the peripheral wall of the floating roof, the lower part of the first bar being curved away from the peripheral wall of the gutter;
  • a second bar having one end rotatably connected to the upper part of the peripheral wall of the floating roof and the other end rotatably connected to the first bar;
  • a spring having a first end connected to that end of the first bar which is rotatably and slidably connected to the peripheral wall of the floating roof and a second end connected to the peripheral wall of the floating roof.
  • the floating roof as claimed in claim 1 including a vapor space provided below the flexible sealing strip and said vapor space is provided with a vapor outlet which comprises a tube passing through the floating roof to the atmosphere.
  • a floating roof for a tank provided at its periphery with guiding shoes adapted to slidably contact the inner surface of the tank wall, comprising:
  • a flexible sealing strip connected to the peripheral wall of the gutter and to the guiding shoe;
  • a mechanism for forcing the guiding shoes against the inner surface of the tank wall including a first bar having one end rotatably connected to the upper part of the guiding shoe and the other end rotatably and slidably connected to the lower part of the peripheral wall of the floating roof;
  • a second bar having one end rotatably connected to the upper part of the peripheral wall of the floating roof and the other end rotatably connected to the first bar;
  • a spring having a first end connected to that end of the first bar which is rotatably and slidably connected to the peripheral wall of the floating roof and a second end connected to the peripheral wall of the floating roof;

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Closures For Containers (AREA)
US822230A 1968-05-09 1969-05-06 Floating roof for a tank Expired - Lifetime US3595432A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1759513A DE1759513C3 (de) 1968-05-09 1968-05-09 Randabdichtung für Schwimmdächer von Behältern zur Lagerung von Flüssigkeiten

Publications (1)

Publication Number Publication Date
US3595432A true US3595432A (en) 1971-07-27

Family

ID=5695629

Family Applications (1)

Application Number Title Priority Date Filing Date
US822230A Expired - Lifetime US3595432A (en) 1968-05-09 1969-05-06 Floating roof for a tank

Country Status (5)

Country Link
US (1) US3595432A (xx)
DE (1) DE1759513C3 (xx)
FR (1) FR2008130A1 (xx)
GB (1) GB1255881A (xx)
NL (1) NL6906948A (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287999A (en) * 1980-05-21 1981-09-08 Gatx Tank Erection Corporation Secondary seal for floating roof storage tank
US5103992A (en) * 1990-04-18 1992-04-14 Hmt, Inc. Shoe seal for floating roof of storage tank, and method of installing same
US5321881A (en) * 1991-09-19 1994-06-21 Hmt, Inc. Method of installing a shoe seal for floating roof of storage tank
US5529200A (en) * 1993-06-16 1996-06-25 Chicago Bridge & Iron Technical Services Company Floating roof metallic shoe seal spring hanger system
US5667091A (en) * 1994-12-29 1997-09-16 Chicago Bridge & Iron Technical Services Company Mounting system for floating roof seals
US20050072782A1 (en) * 2002-12-16 2005-04-07 Chicago Bridge & Iron Company Spring-loaded secondary seal for floating-roof storage tank
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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6068287A (ja) * 1983-09-12 1985-04-18 日本鋼管株式会社 石油タンクの浮屋根シ−ル装置
CN113291640B (zh) * 2021-06-25 2022-10-04 江苏菲诺机械设备有限公司 双密封浮盘

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693468A (en) * 1926-01-06 1928-11-27 Firm Aug Klonne Sealing piston for reservoirs for the storage of gas, steam, or easilyevaporating liquids
US1831020A (en) * 1928-06-06 1931-11-10 Standard Oil Co California Sealing construction for tanks
US1870316A (en) * 1928-08-29 1932-08-09 Bartlett Hayward Co Gas holder
US1910922A (en) * 1931-05-29 1933-05-23 Herman F Jurisch Gas holder
US2542444A (en) * 1948-01-29 1951-02-20 Graver Tank & Mfg Co Inc Liquid storage tank and seal mechanism
US2696930A (en) * 1951-08-24 1954-12-14 Chicago Bridge & Iron Co Seal hanger for floating roof tanks
US2754026A (en) * 1953-01-29 1956-07-10 John H Wiggins Sealing mechanism for floating tank roofs
US2888161A (en) * 1957-09-11 1959-05-26 Union Tank Car Co Static drain arrangement
GB830489A (en) * 1957-07-11 1960-03-16 John Martin Binmore Improvements in or relating to volatile-liquid storage tanks having floating roofs, and sealing means therefor
US2987215A (en) * 1955-08-15 1961-06-06 Ii William E Joor Variable volume storage tanks
FR1273719A (fr) * 1960-11-16 1961-10-13 Aug Klonne Réservoir pour liquides se volatilisant facilement et pour des gaz

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693468A (en) * 1926-01-06 1928-11-27 Firm Aug Klonne Sealing piston for reservoirs for the storage of gas, steam, or easilyevaporating liquids
US1831020A (en) * 1928-06-06 1931-11-10 Standard Oil Co California Sealing construction for tanks
US1870316A (en) * 1928-08-29 1932-08-09 Bartlett Hayward Co Gas holder
US1910922A (en) * 1931-05-29 1933-05-23 Herman F Jurisch Gas holder
US2542444A (en) * 1948-01-29 1951-02-20 Graver Tank & Mfg Co Inc Liquid storage tank and seal mechanism
US2696930A (en) * 1951-08-24 1954-12-14 Chicago Bridge & Iron Co Seal hanger for floating roof tanks
US2754026A (en) * 1953-01-29 1956-07-10 John H Wiggins Sealing mechanism for floating tank roofs
US2987215A (en) * 1955-08-15 1961-06-06 Ii William E Joor Variable volume storage tanks
GB830489A (en) * 1957-07-11 1960-03-16 John Martin Binmore Improvements in or relating to volatile-liquid storage tanks having floating roofs, and sealing means therefor
US2888161A (en) * 1957-09-11 1959-05-26 Union Tank Car Co Static drain arrangement
FR1273719A (fr) * 1960-11-16 1961-10-13 Aug Klonne Réservoir pour liquides se volatilisant facilement et pour des gaz

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287999A (en) * 1980-05-21 1981-09-08 Gatx Tank Erection Corporation Secondary seal for floating roof storage tank
US5103992A (en) * 1990-04-18 1992-04-14 Hmt, Inc. Shoe seal for floating roof of storage tank, and method of installing same
US5321881A (en) * 1991-09-19 1994-06-21 Hmt, Inc. Method of installing a shoe seal for floating roof of storage tank
US5529200A (en) * 1993-06-16 1996-06-25 Chicago Bridge & Iron Technical Services Company Floating roof metallic shoe seal spring hanger system
US5667091A (en) * 1994-12-29 1997-09-16 Chicago Bridge & Iron Technical Services Company Mounting system for floating roof seals
US20050072782A1 (en) * 2002-12-16 2005-04-07 Chicago Bridge & Iron Company Spring-loaded secondary seal for floating-roof storage tank
US7748555B2 (en) * 2002-12-16 2010-07-06 Chicago Bridge & Iron Company Spring-loaded secondary seal for floating-roof storage tank
US11548725B2 (en) 2013-03-15 2023-01-10 Industrial & Environmental Concepts, Inc. Cover systems, tank covering methods, and pipe retention systems

Also Published As

Publication number Publication date
GB1255881A (en) 1971-12-01
FR2008130A1 (xx) 1970-01-16
DE1759513C3 (de) 1978-05-11
DE1759513A1 (de) 1970-10-15
NL6906948A (xx) 1969-11-11
DE1759513B2 (de) 1977-09-15

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