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WO1994026627A1 - Procede et systeme de surveillance de l'inclinaison d'un toit flottant - Google Patents

Procede et systeme de surveillance de l'inclinaison d'un toit flottant Download PDF

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Publication number
WO1994026627A1
WO1994026627A1 PCT/DK1994/000193 DK9400193W WO9426627A1 WO 1994026627 A1 WO1994026627 A1 WO 1994026627A1 DK 9400193 W DK9400193 W DK 9400193W WO 9426627 A1 WO9426627 A1 WO 9426627A1
Authority
WO
WIPO (PCT)
Prior art keywords
floating roof
monitoring system
monitoring
liquid
inclination
Prior art date
Application number
PCT/DK1994/000193
Other languages
English (en)
Inventor
Tommy Christensen
Original Assignee
Cbi Engineering A/S
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 Cbi Engineering A/S filed Critical Cbi Engineering A/S
Priority to AU67939/94A priority Critical patent/AU6793994A/en
Publication of WO1994026627A1 publication Critical patent/WO1994026627A1/fr

Links

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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
    • G01F23/68—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using electrically actuated indicating means
    • G01F23/70—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using electrically actuated indicating means for sensing changes in level only at discrete points
    • G01F23/703—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using electrically actuated indicating means for sensing changes in level only at discrete points using electromechanically actuated indicating means

Definitions

  • the invention concerns a method for monitoring the incli- nation of a floating roof with respect to the free liquid surface in a liquid tank, in particular a fuel tank, as stated in the introductory portion of claim 1, as well as a monitoring system for performing said method.
  • floating roofs for this purpose are usually manufac- ture as large steel structures and have a weight of the order of 50-180 tons and a diameter about 25 meters, it is extremely important to ensure that the floating roof does not capsize in case of failure in some of the buoyancy means positioned in the floating roof.
  • capsizing of the floating roof may e.g. cause the floating roof to sink into the liquid.
  • cap- sizing of the floating roof may cause the floating roof to wedge in the structure of the tank, which, when e.g. fuel is discharged from the tank, might result in a catastrophy if it subsequently falls down. This may cause the genera ⁇ tion of sparks that ignite the oil product, which results in an explosion.
  • the object of the present invention is therefore to pro ⁇ vide a method and a monitoring system for floating roofs, ensuring that it is always possible to monitor the incli- nation of the floating roof in a simple manner so as to prevent the above-mentioned damaging effects.
  • Claims 2, 3, 5, 6, and 7 define embodiments in which the system is more in the nature of an alarm system that be ⁇ gins to operate when the inclination of the floating roof becomes critical, which is achieved in a particularly in ⁇ expensive and uncomplicated manner.
  • Claim 10 defines an embodiment which makes it simple to adjust and calibrate the monitoring system, the advantage being that the system is simple to adapt to many different floating roof structures, including floating roofs which are in operation.
  • fig. 1 is a schematic top view of a floating roof provided with a monitoring system according to the invention.
  • fig. 2 is a lateral cross-section of the floating roof at one of the liquid level gauges shown in fig. 1.
  • Fig. 1 shows an example of a floating roof having a moni ⁇ toring system according to the invention, where the rest of the tank structure is omitted for clarity.
  • the floating roof has an annular floating roof pontoon 20 and a central one-plate or two-plate floating roof structure 25.
  • the central structure 25 includes four groups of liquid level gauges 10 which are spaced from the center of the floating roof and are positioned at a mutual angle of 90° with re- spect to the center. To obtain the best possible effect of the system, the liquid level gauges are located as far as possible away from the center of the floating roof, which means in the vicinity of the floating roof pontoon 20.
  • the liquid level gauges are connected to the monitoring unit 15 via the signal lines 12.
  • the monitoring unit 15 which may expediently be located in a control room adapted for the purpose, may be formed by a simple alarm or a more complicated calculating unit for writing measurement values, as required.
  • Fig. 2 shows a cross-section of the floating roof at one of the liquid level gauges 10 shown in fig. 1.
  • the liquid surface in the tank is indicated by the broken line 30.
  • the liquid level gauge 10 comprises a vertical pipe 50 having an interiorly located concentric pipe 60.
  • a ring- shaped float 40 is slidable in a vertical direction in the space between the pipes 50, 60. This space is downwardly defined by a blocking face having oil inlet openings 58.
  • the float 40 thus floats on the liquid surface 30 in the pipe 50.
  • the pipe 50 is defined by a blocking plate 70 having two tightening elements 72, 74 which have cooperating conical faces.
  • a termination box 80 which connects the liquid level gauge 10 to the monitoring unit 15 of the tank, is provided at the top of the pipe 60.
  • the pipe 60 is interiorly provided with a printed circuit board having a plurality of reed contacts which are ac ⁇ tuated by a magnet arranged in the float 40. Since the printed circuit board in the pipe 60 is provided with a reed contact which is actuated when the float 40 is in the expected position of the liquid level, a shift of the reed contact will be recorded when the float 40 moves away from its expected position.
  • the reed contact registers this as soon as the float 40 with its active magnetic field has been moved a few centimeters away from it.
  • the monitoring system then gives an alarm signal, making it possible to prevent damage which may be a consequence of the inclination of the floating roof.
  • the system lends itself for incorporation into floating roofs of very different structures. In connection with floating roofs which are in use, it will thus also be possible to incor- porate the monitoring system while the tank is in opera ⁇ tion, e.g. in one of the pipes in the supporting legs of the floating roof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Fluid Mechanics (AREA)
  • Level Indicators Using A Float (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Procédé de surveillance de l'inclinaison d'un toit flottant par rapport à la surface du liquide libre dans une cuve à liquide, notamment une citerne à fioul, selon lequel des mesures de la hauteur de la surface du liquide par rapport au toit flottant sont effectuées au niveau de plusieurs endroits espacés sur le toit flottant, ces valeurs de mesure étant transmises à une unité de surveillance qui combine et compare les valeurs de mesure provenant des endroits individuels et génère un signal résultant qui indique l'inclinaison du toit flottant. Ceci permet de surveiller en continu l'inclinaison du toit flottant d'une matière simple et par conséquent d'éviter les dommages provoqués lorsque par exemple le toit flottant ce coince dans la citerne.
PCT/DK1994/000193 1993-05-17 1994-05-17 Procede et systeme de surveillance de l'inclinaison d'un toit flottant WO1994026627A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU67939/94A AU6793994A (en) 1993-05-17 1994-05-17 A method and a monitoring system for monitoring the inclination of a floating roof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK57493A DK57493D0 (da) 1993-05-17 1993-05-17 Fremgangsmaade til overvaagningssystem til overvaagning af et flydetags haeldning
DK0574/93 1993-05-17

Publications (1)

Publication Number Publication Date
WO1994026627A1 true WO1994026627A1 (fr) 1994-11-24

Family

ID=8095096

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1994/000193 WO1994026627A1 (fr) 1993-05-17 1994-05-17 Procede et systeme de surveillance de l'inclinaison d'un toit flottant

Country Status (3)

Country Link
AU (1) AU6793994A (fr)
DK (1) DK57493D0 (fr)
WO (1) WO1994026627A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2264338C2 (ru) * 2003-08-08 2005-11-20 Государственное унитарное предприятие "Институт проблем транспорта энергоресурсов" (ГУП "ИПТЭР") Плавающая крыша резервуара
NL1032192C2 (nl) * 2006-07-18 2008-01-21 Enraf Bv Opslagtank voor een vloeistof.
WO2010035201A2 (fr) * 2008-09-24 2010-04-01 Syscor Research And Development Inc. Appareil de telesurveillance sans fil de toit flottant de reservoirs de stockage couverts
WO2013070131A1 (fr) * 2011-11-11 2013-05-16 Rosemount Tank Radar Ab Contrôle de cuve à toit flottant
CN103885467A (zh) * 2012-12-21 2014-06-25 罗斯蒙特储罐雷达股份公司 识别容器的浮置顶部的运行中的不期望的状况
CN106248169A (zh) * 2015-06-08 2016-12-21 振华石油（营口）储运有限责任公司 一种外浮顶原油储罐内原油液位高度的测量方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309790A1 (de) * 1973-02-27 1974-08-29 Goetzelmann Ind Abwasser Einrichtung zum messen eines fluessigkeitsniveaus
EP0146919A2 (fr) * 1983-12-23 1985-07-03 Pfister GmbH Procédé et dispositif pour la compensation des influences sur un toit flottant d'une installation de pesage d'un réservoir

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309790A1 (de) * 1973-02-27 1974-08-29 Goetzelmann Ind Abwasser Einrichtung zum messen eines fluessigkeitsniveaus
EP0146919A2 (fr) * 1983-12-23 1985-07-03 Pfister GmbH Procédé et dispositif pour la compensation des influences sur un toit flottant d'une installation de pesage d'un réservoir

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 12, No. 497, P-806; & JP,A,63 206 611, (KAWASAKI STEEL CORP), 25 August 1988. *
PATENT ABSTRACTS OF JAPAN, Vol. 13, No. 334, M-85; & JP,A,1 111 691, (ISHIKAWAJIMA HARIMA HEAVY IND CO LTD), 28 April 1989. *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2264338C2 (ru) * 2003-08-08 2005-11-20 Государственное унитарное предприятие "Институт проблем транспорта энергоресурсов" (ГУП "ИПТЭР") Плавающая крыша резервуара
NL1032192C2 (nl) * 2006-07-18 2008-01-21 Enraf Bv Opslagtank voor een vloeistof.
WO2008010702A1 (fr) * 2006-07-18 2008-01-24 Enraf B.V. Réservoir de liquide
WO2010035201A2 (fr) * 2008-09-24 2010-04-01 Syscor Research And Development Inc. Appareil de telesurveillance sans fil de toit flottant de reservoirs de stockage couverts
WO2010035201A3 (fr) * 2008-09-24 2010-05-20 Syscor Research And Development Inc. Appareil de telesurveillance sans fil de toit flottant de reservoirs de stockage couverts
US9377340B2 (en) 2011-11-11 2016-06-28 Rosemount Tank Radar Ab Monitoring of floating roof tank
WO2013070131A1 (fr) * 2011-11-11 2013-05-16 Rosemount Tank Radar Ab Contrôle de cuve à toit flottant
RU2607312C2 (ru) * 2011-11-11 2017-01-10 Роузмаунт Танк Радар Аб Способ контроля плавающей крыши резервуара
CN103885467A (zh) * 2012-12-21 2014-06-25 罗斯蒙特储罐雷达股份公司 识别容器的浮置顶部的运行中的不期望的状况
WO2014098696A1 (fr) * 2012-12-21 2014-06-26 Rosemount Tank Radar Ab Identification de conditions indésirables dans le fonctionnement d'un toit flottant d'un réservoir
US9163973B2 (en) 2012-12-21 2015-10-20 Rosemount Tank Radar Ab Identifying undesired conditions in the function of a floating roof of a tank
RU2619808C2 (ru) * 2012-12-21 2017-05-18 Роузмаунт Танк Радар Аб Способ определения нежелательных условий для функционирования плавающей крыши резервуара
CN106248169A (zh) * 2015-06-08 2016-12-21 振华石油（营口）储运有限责任公司 一种外浮顶原油储罐内原油液位高度的测量方法

Also Published As

Publication number Publication date
AU6793994A (en) 1994-12-12
DK57493D0 (da) 1993-05-17

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