US3329301A - Floating tank top - Google Patents

Floating tank top Download PDF

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Publication number
US3329301A
US3329301A US325434A US32543463A US3329301A US 3329301 A US3329301 A US 3329301A US 325434 A US325434 A US 325434A US 32543463 A US32543463 A US 32543463A US 3329301 A US3329301 A US 3329301A
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United States
Prior art keywords
tank top
tank
floating tank
floating
plug
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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
Application number
US325434A
Inventor
Frankie H Lee
Barnes Martha Lee
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
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Publication date
Application filed by Exxon Research and Engineering Co filed Critical Exxon Research and Engineering Co
Priority to US325434A priority Critical patent/US3329301A/en
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Publication of US3329301A publication Critical patent/US3329301A/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
    • 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
    • Y10T137/7287—Liquid level responsive or maintaining systems
    • Y10T137/7358—By float controlled valve
    • Y10T137/7404—Plural floats
    • 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
    • Y10T137/7287—Liquid level responsive or maintaining systems
    • Y10T137/7358—By float controlled valve
    • Y10T137/7423—Rectilinearly traveling float
    • Y10T137/7426—Float co-axial with valve or port
    • Y10T137/7436—Float rigid with valve

Definitions

  • This invention relates to floating tank tops used in tanks for storing liquids. More particularly, this invention is a floating tank top including an automatic valve mechani m.
  • the invention comprises a floating tank top in a tank adapted to store liquid.
  • a normally closed valve mechanism is included in the floating tank top. Structure is provided to open the normally closed valve mechanism when the liquid level falls to a predetermined level.
  • FIG. 1 is a schematic, elevational view of a floating tank top in a tank
  • FIG. 2 is an elevational view, partly in section, showing one embodiment of the valve mechanism
  • FIG. 3 is a view similar to FIG. 1 showing the valve mechanism in the open position
  • FIG. 4 is an elevational view, partly in section, showing a second embodiment of the valve mechanism.
  • FIG. 4A is a view taken along line 4A-4A of FIG. 4.
  • a tank which is used for storing a liquid such as oil.
  • a floating tank top 12 including a rim 14 and a centrally located sump 16 is located within the tank 10.
  • the floating tank top 12 is preferably inclined from the horizontal as shown.
  • the tank top 12 is maintained in the proper position within the tank 10 for vertical movement with substantially no lateral movement by means of metallic shoes, such as metallic shoes 18 and 20, which are connected to an annular flexible seal 22 which, in turn, is connected to the rim 14.
  • a plurality of sleeves, such as sleeves 24 and 26, is mounted on the floating tank top 12. Two sleeves are shown in the schematic drawing of FIG. 1. However, it is to be understood that in actual practice, many more sleeves will be used.
  • the sleeves 24 and 26 may be braced by means of wire braces 28 and 30, respectively.
  • Pipe supports 32 and 34 are connected to the sleeves 24 and 26, respectively, by metal pins 36 and 38, respectively.
  • the pipe supports 32 and 34 extend above and below the sleeves 24 and 26.
  • a drain including check valve 40 is mounted in the sump 16.
  • the check valve 40 is adapted to permit liquid having a density above a predetermined density to flow through check valve 40 and hose 42 and out of the tank 10.
  • the bottom of the tank 10 may be provided with a sump 46 to which a conduit 48 is connected. The flow of fluids through conduit 48 is controlled by means of valve 50.
  • the floating tank top 12 includes a valve mechanism which is shown in 'detail in FIG. 2. As shown in FIG. 2, the valve mechanism includes an annular plate 52 which is connected to the floating tank top 12 -by means of bolts 54 and nuts 56. A gasket 58 is located between the annular plate 52 and the floating tank top 12.
  • An annular valve seat member 60 provided with port 61 may be welded to the bottom of plate 52.
  • the annular valve seat member 60 has its inside perimeter beveled.
  • the beveled inside perimeter of the annular valve seat member 60 provides a seat for the plug 62 which is connected to a float 64 by means of bolt 66 and nut 68.
  • the plug 62 is provided with a groove 70 which receives an O-ring 72.
  • a stem 74 provided with an outwardly extending flange 76 is connected to the plug 62 by means of bolts 78.
  • a slot 80 is provided in the stem 74.
  • a stop bar 82 mounted in the stem 74 above the slot 80 and vertically spaced therefrom is a stop bar 82.
  • a handle 84 is mounted across the top of the stem 74.
  • a stem guide 86 is fixedly connected to the top of annula-r plate 52 by braces 88.
  • a metal sheet 90 is also mounted about the stem guide 86.
  • a screen 92 is connected to the metal sheet 90 and rests on the top of annular plate 52.
  • a wedge 94 is connected to handle 84 by a chain or Wire 96.
  • FIGS. 4 and 4A A second embodiment of a floating valve mechanism is shown in FIGS. 4 and 4A.
  • a valve seat 98 which is connected to the floating tank top 12 is adapted to seat a hemispheric plug 100.
  • a bracket 102 is connected to the bottom of valve seat 98 and supports a guide sleeve 104.
  • a first float 106 and a second float 108 are pivotally connected to the valve stem 110 by means of rods 112 and 114-, respectively.
  • a pivot pin 116 extends through elongated holes formed in rod 112, rod 114, and valve stem 110.
  • the normally closed valve mechanism opens when the floating tank top 12 is in its lowermost position within the tank 10.
  • the open position of the valve mechanism is shown in FIG. 3.
  • the float 64 continues to fall with the fall of the oil level after the floating tank top 12 has reached its lowermost position.
  • the plug 62 is moved from engagement with the port 61 formed in the floating tank top.
  • any excess water which is not drained from the sump 16 will overflow through the port 61 into the tank 10. This water can be removed from the sump 46 in the bottom of the tank 10 by means of conduit 48.
  • the float 64 maintains the plug 62 in sealing engagement within the port 61. However, when the tank top 12 falls to its lowermost position, further movement of the tank top 12 is prevented. Thereafter, the float 64 will fall along with the liquid level to disengage the plug 62 from its seat. The downward movement of the plug 62 is limited by the engagement of the bar 82 with stem guide 86.
  • valve mechamsm separately located from said sump 2,931,534 4/1960 Wiggins 220*26 which valve mechanism is normally closed when the floating tank top is floating on the stored liquid in THERON CONDON Primary Examiner the tank, said valve mechanism including a plug adapted to sealingly fit in a port in said floating tank 25 JAMES GARRETT Examine"-

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Non-Electrical Variables (AREA)

Description

July 4-, 1967 A LEE 3,329,301
FLOATING TANK TOP Filed Nov. 21, 1963 3 Sheets-Sheet 1 FLOATNG TOP A SUPPORT ROD FLEXIBLE HOSE DRAIN SUMP INVENTOR. PERCY A. LEE,
BY +MA 3,7
ATTORNE July 4, 1967 P. A. LEE 3,329,301
FLOATING TANK TOP Filed Nov. 21 1963 s'ro P BAR LOCK WEDGE 82 STEM GUIDE TRASH GUARD SCREEN FLOATING TANK TOP FIG. 2.
INVENTOR. P E RC Y A LE E BY gbwni 8, 2
7 A T TQR Ye 3 Sheets-Sheet 2 July 4, 1967 I p, A, LEE 3,329,301
FLOATING TANK T-OP Filed Nov. 21., 1965 :F'IG. 4A.
IINVENTOR P E RCY A. LE E s Sheets-Sheet 5 United States Patent 3,329,301 FLOATING TANK TOP Percy A. Lee, Houston, Tex., Frankie H. Lee and Martha Lee Barnes, executrices of said Percy A. Lee, deceased, assignor, by mesne assignments, to Esso Research and Engineering Company, Elizabeth, N.J., a corporation of Delaware Filed Nov. 21, 1963, Ser. No. 325,434 1 Claim. (Cl. 220-26) This invention relates to floating tank tops used in tanks for storing liquids. More particularly, this invention is a floating tank top including an automatic valve mechani m.
Briefly described, the invention comprises a floating tank top in a tank adapted to store liquid. A normally closed valve mechanism is included in the floating tank top. Structure is provided to open the normally closed valve mechanism when the liquid level falls to a predetermined level.
The invention, as well as its many advantages, will be understood by reference to the following detailed description and drawings in which:
FIG. 1 is a schematic, elevational view of a floating tank top in a tank;
FIG. 2 is an elevational view, partly in section, showing one embodiment of the valve mechanism;
FIG. 3 is a view similar to FIG. 1 showing the valve mechanism in the open position;
FIG. 4 is an elevational view, partly in section, showing a second embodiment of the valve mechanism; and
FIG. 4A is a view taken along line 4A-4A of FIG. 4.
Referring to the drawings and more particularly to FIG. 1, a tank is shown which is used for storing a liquid such as oil. A floating tank top 12 including a rim 14 and a centrally located sump 16 is located within the tank 10. The floating tank top 12 is preferably inclined from the horizontal as shown.
The tank top 12 is maintained in the proper position within the tank 10 for vertical movement with substantially no lateral movement by means of metallic shoes, such as metallic shoes 18 and 20, which are connected to an annular flexible seal 22 which, in turn, is connected to the rim 14.
A plurality of sleeves, such as sleeves 24 and 26, is mounted on the floating tank top 12. Two sleeves are shown in the schematic drawing of FIG. 1. However, it is to be understood that in actual practice, many more sleeves will be used. The sleeves 24 and 26 may be braced by means of wire braces 28 and 30, respectively.
Pipe supports 32 and 34 are connected to the sleeves 24 and 26, respectively, by metal pins 36 and 38, respectively. The pipe supports 32 and 34 extend above and below the sleeves 24 and 26.
A drain including check valve 40 is mounted in the sump 16. The check valve 40 is adapted to permit liquid having a density above a predetermined density to flow through check valve 40 and hose 42 and out of the tank 10. The bottom of the tank 10 may be provided with a sump 46 to which a conduit 48 is connected. The flow of fluids through conduit 48 is controlled by means of valve 50. e
The floating tank top 12 includes a valve mechanism which is shown in 'detail in FIG. 2. As shown in FIG. 2, the valve mechanism includes an annular plate 52 which is connected to the floating tank top 12 -by means of bolts 54 and nuts 56. A gasket 58 is located between the annular plate 52 and the floating tank top 12.
An annular valve seat member 60 provided with port 61 may be welded to the bottom of plate 52. The annular valve seat member 60 has its inside perimeter beveled. The beveled inside perimeter of the annular valve seat member 60 provides a seat for the plug 62 which is connected to a float 64 by means of bolt 66 and nut 68. The plug 62 is provided with a groove 70 which receives an O-ring 72.
A stem 74 provided with an outwardly extending flange 76 is connected to the plug 62 by means of bolts 78. A slot 80 is provided in the stem 74. Mounted in the stem 74 above the slot 80 and vertically spaced therefrom is a stop bar 82. Also, a handle 84 is mounted across the top of the stem 74.
A stem guide 86 is fixedly connected to the top of annula-r plate 52 by braces 88. A metal sheet 90 is also mounted about the stem guide 86. A screen 92 is connected to the metal sheet 90 and rests on the top of annular plate 52. A wedge 94 is connected to handle 84 by a chain or Wire 96.
A second embodiment of a floating valve mechanism is shown in FIGS. 4 and 4A. As shown in FIGS. 4 and 4A, a valve seat 98 which is connected to the floating tank top 12 is adapted to seat a hemispheric plug 100. A bracket 102 is connected to the bottom of valve seat 98 and supports a guide sleeve 104. A first float 106 and a second float 108 are pivotally connected to the valve stem 110 by means of rods 112 and 114-, respectively. A pivot pin 116 extends through elongated holes formed in rod 112, rod 114, and valve stem 110.
The operation of my new floating tank top system will be explained with reference to the storage of oil. However, it is to be understood that this new floating tank top system may be used in combination with tanks used to store other liquids. When the liquid level in the tank 10 is such that the supports 32 and 34 are spaced above the bottom of tank 10, the liquid level will normally extend to a level 118 (see FIG. 1). If it should rain, the water, being heavier than oil, will accumulate in the sump 16 and flow through check valve 40 and hose 42 out of the tank 10. However, if sufficient oil has been removed from the tank 10 so that the supports 32 and 34 rest on the bottom of tank 10, the oil level 120 (see FIG. 3) will be located below the sump 16. Also, the hose 42 becomes coiled due to slack. Hence, the efiiciency of the drainage of water is greatly decreased. As a result, several floating tank tops have been completely demolished and made useless by water accumulating on the top of the floating tank tops due to a downpour while the supports 32 and 34 are resting on the bottom of the tank 10. It has been found that the drainage from the ump 16 under heavy rain conditions is not sufficient to prevent the destruction of the floating tank top.
With my new system, however, the normally closed valve mechanism opens when the floating tank top 12 is in its lowermost position within the tank 10. The open position of the valve mechanism is shown in FIG. 3. AS shown in FIG. 3, the float 64 continues to fall with the fall of the oil level after the floating tank top 12 has reached its lowermost position. The plug 62 is moved from engagement with the port 61 formed in the floating tank top. Thus, any excess water which is not drained from the sump 16 will overflow through the port 61 into the tank 10. This water can be removed from the sump 46 in the bottom of the tank 10 by means of conduit 48.
From the foregoing, it can be seen that normally the float 64 maintains the plug 62 in sealing engagement within the port 61. However, when the tank top 12 falls to its lowermost position, further movement of the tank top 12 is prevented. Thereafter, the float 64 will fall along with the liquid level to disengage the plug 62 from its seat. The downward movement of the plug 62 is limited by the engagement of the bar 82 with stem guide 86.
When the tank 10 is again refilled with liquid, the plug 62 will automatically sealingly engage the seat in annular member 60. If it is desired to close the valve mechanism in the event of float failure or O ring failure or before the 3 4 tank 10 is refilled with liquid, it is only necessary that the top, and at least one float member extending below handle $4 be pulled upwardly and the wedge 94 placed said tank topoperatively connected to the plug wherein the slot 80 in stem 74-. by when the floating tank top is in the lowermost If the embodiment shown in FIGS. 4 and 4A is used in position permitted by the said support members and place of the embodiment shown in FIGS. 1, 2, and 3, the r' the liquid level in the tank thereafter falls suflicientl I a Q y hemispheric plug 100 will be moved upwardly from its to be out of floatlng relationship with said float memseat after the float in tank top 12 has reached its lowerber, the plug is moved from sealing engagement with most position and the floats 106 and 108 have thereafter said port as said float moves a predetermined disfallen along with a fall in the liquid level. tance from said floating tank top.
I claim: 10 In bi i References Cited a tank adapted to store liquid; UNITED STATES PATENTS a floating tank top 1n the tank and having a centrally 628,581 7/1899 Grosswyler 137 433 mated Sump 1 559 016 10/1925 Stovall 220-26 a flexible hose connected to the sump adapted to drain 15 liquid from the sump through the tank to the outside 1633581 6/1927 Gordon et a1 137433 1,720,919 7/1929 Nesbitt 137 423 P 2 050 686 8/1936 Wiggins a plurality of support members mounted on and extend- 2536O77 1/1951 0 rr et al. 220 14 mg below said floating tank top and adapted to l1m1t 2 560 586 7/1951 Mbhq 1 220 26 the lowermost position of the floating tank top; and 20 2735574 2/1956} h g; 22O:26 a valve mechamsm separately located from said sump 2,931,534 4/1960 Wiggins 220*26 which valve mechanism is normally closed when the floating tank top is floating on the stored liquid in THERON CONDON Primary Examiner the tank, said valve mechanism including a plug adapted to sealingly fit in a port in said floating tank 25 JAMES GARRETT Examine"-
US325434A 1963-11-21 1963-11-21 Floating tank top Expired - Lifetime US3329301A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762690A (en) * 1972-01-31 1973-10-02 Mixing Equipment Co Mixing system for floating roof tanks
US3883032A (en) * 1974-04-22 1975-05-13 Texaco Canada Limited Automatic drain valve for a floating roof
JPS51134412A (en) * 1975-05-16 1976-11-20 Showa Shell Sekiyu Kk A liquid storage tank having floati ng lid
US20050081925A1 (en) * 2003-10-15 2005-04-21 Pyle Mark A. Storage tank de-inventorying
US20080155918A1 (en) * 2006-12-28 2008-07-03 Ben Afeef Mohammed A Overflow drainage system for floating roof storage tank
EP2174044A1 (en) * 2007-07-31 2010-04-14 Kai Chye Stephen Seow A vacuum break valve structure
US20120037456A1 (en) * 2004-10-05 2012-02-16 Toyota Jidosha Kabushiki Kaisha Oil pan and lubricating device
US20160121712A1 (en) * 2014-10-30 2016-05-05 Honda Motor Co., Ltd. Fluid storage apparatus
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
US628581A (en) * 1899-02-28 1899-07-11 Kilian Grosswyler Apparatus for regulating the level of liquid.
US1559016A (en) * 1921-01-04 1925-10-27 C A Gibson Method of and tank for storing oil
US1633581A (en) * 1926-01-21 1927-06-28 Gordon Cyril Joseph Safety faucet
US1720919A (en) * 1929-07-16 Float mechanism fob cooling tanks
US2050686A (en) * 1935-04-18 1936-08-11 John H Wiggins Gas and liquid storage device
US2536077A (en) * 1946-10-17 1951-01-02 Chicago Bridge & Iron Co Vent for floating roof tanks
US2560586A (en) * 1946-04-24 1951-07-17 Chicago Bridge & Iron Co Floating roof drain
US2735574A (en) * 1956-02-21 williams
US2931534A (en) * 1958-04-07 1960-04-05 John H Wiggins Automatic emergency drain mechanisms for floating roofs

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1720919A (en) * 1929-07-16 Float mechanism fob cooling tanks
US2735574A (en) * 1956-02-21 williams
US628581A (en) * 1899-02-28 1899-07-11 Kilian Grosswyler Apparatus for regulating the level of liquid.
US1559016A (en) * 1921-01-04 1925-10-27 C A Gibson Method of and tank for storing oil
US1633581A (en) * 1926-01-21 1927-06-28 Gordon Cyril Joseph Safety faucet
US2050686A (en) * 1935-04-18 1936-08-11 John H Wiggins Gas and liquid storage device
US2560586A (en) * 1946-04-24 1951-07-17 Chicago Bridge & Iron Co Floating roof drain
US2536077A (en) * 1946-10-17 1951-01-02 Chicago Bridge & Iron Co Vent for floating roof tanks
US2931534A (en) * 1958-04-07 1960-04-05 John H Wiggins Automatic emergency drain mechanisms for floating roofs

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762690A (en) * 1972-01-31 1973-10-02 Mixing Equipment Co Mixing system for floating roof tanks
US3883032A (en) * 1974-04-22 1975-05-13 Texaco Canada Limited Automatic drain valve for a floating roof
JPS51134412A (en) * 1975-05-16 1976-11-20 Showa Shell Sekiyu Kk A liquid storage tank having floati ng lid
JPS5546952B2 (en) * 1975-05-16 1980-11-27
US20050081925A1 (en) * 2003-10-15 2005-04-21 Pyle Mark A. Storage tank de-inventorying
US7073530B2 (en) * 2003-10-15 2006-07-11 Equistar Chemicals, Lp Storage tank de-inventorying
US20120037456A1 (en) * 2004-10-05 2012-02-16 Toyota Jidosha Kabushiki Kaisha Oil pan and lubricating device
US8297407B2 (en) * 2004-10-05 2012-10-30 Toyota Jidosha Kabushiki Kaisha Oil pan and lubricating device
US20080155918A1 (en) * 2006-12-28 2008-07-03 Ben Afeef Mohammed A Overflow drainage system for floating roof storage tank
US7721903B2 (en) 2006-12-28 2010-05-25 Saudi Arabian Oil Company Overflow drainage system for floating roof storage tank
EP2174044A4 (en) * 2007-07-31 2011-03-23 Kai Chye Stephen Seow A vacuum break valve structure
EP2174044A1 (en) * 2007-07-31 2010-04-14 Kai Chye Stephen Seow A vacuum break valve structure
US11548725B2 (en) 2013-03-15 2023-01-10 Industrial & Environmental Concepts, Inc. Cover systems, tank covering methods, and pipe retention systems
US20160121712A1 (en) * 2014-10-30 2016-05-05 Honda Motor Co., Ltd. Fluid storage apparatus
US10059194B2 (en) * 2014-10-30 2018-08-28 Honda Motor Co., Ltd. Fluid storage apparatus

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