EP0080130A1 - Moyen d'étanchéité pour l'espace annulaire entre la paroi d'un réservoir et le toit flottant d'un grand réservoir de stockage - Google Patents

Moyen d'étanchéité pour l'espace annulaire entre la paroi d'un réservoir et le toit flottant d'un grand réservoir de stockage Download PDF

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Publication number
EP0080130A1
EP0080130A1 EP82110463A EP82110463A EP0080130A1 EP 0080130 A1 EP0080130 A1 EP 0080130A1 EP 82110463 A EP82110463 A EP 82110463A EP 82110463 A EP82110463 A EP 82110463A EP 0080130 A1 EP0080130 A1 EP 0080130A1
Authority
EP
European Patent Office
Prior art keywords
annular gap
sealing
spring
free ends
tank wall
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.)
Granted
Application number
EP82110463A
Other languages
German (de)
English (en)
Other versions
EP0080130B1 (fr
Inventor
Heinrich Ing.Grad. Imhof
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.)
INGENIEURBURO IMHOF GmbH
Ingenieurbuero Imhof GmbH
Original Assignee
INGENIEURBURO IMHOF GmbH
Ingenieurbuero Imhof GmbH
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 INGENIEURBURO IMHOF GmbH, Ingenieurbuero Imhof GmbH filed Critical INGENIEURBURO IMHOF GmbH
Publication of EP0080130A1 publication Critical patent/EP0080130A1/fr
Application granted granted Critical
Publication of EP0080130B1 publication Critical patent/EP0080130B1/fr
Expired 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
    • 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
    • B65D88/50—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle with resilient foam or stuffed seal

Definitions

  • the invention relates to a device for sealing the annular gap between the vertical container wall and the floating cover of a large-capacity container, in particular a floating roof tank or a fixed roof tank with an internal floating cover, consisting of a large number of narrow spring bands attached to one another at regular intervals on the circumference of the floating cover and resilient with their free ends are directed against the tank wall and press an elastic sealing profile fastened at their free ends along a circumferential line against the container wall, the annular gap being closed by a sealing apron which runs around the entire annular gap between the sealing profile and the floating cover.
  • annular gap seals are mainly used for the storage of volatile, liquid refinery products and chemicals to avoid evaporation losses and the accumulation of dangerous vapors.
  • the annular gap required for the vertical movement of the floating cover between the vertical tank wall and the floating ceiling must be closed by an elastic sealing element which is capable of operating-related changes in the annular gap width as well as severe out-of-roundness leveling and bulging of the tank wall and thereby preventing the escape of product vapors or the ingress of rainwater as far as possible.
  • annular gap seal Another important task of the annular gap seal is to ensure that the free-floating cover is adequately centered, which is to ensure trouble-free vertical movement without local overloading or tilting.
  • the frictional forces emanating from the annular gap seal must not become so great that there is a risk of the floating cover getting caught or being flooded by stored product.
  • the annular gap seal should be able to exert a uniformly strong centering effect over the entire circumference of the tank, be able to easily compensate for deviations in the annular gap width by means of eccentricity, out-of-roundness and bumps with the help of sufficient spring travel, cover even smaller imperfections and unevenness of the tank wall by means of wide-area and elastic adjustment and as wear-resistant as possible have outer shell.
  • the materials used should be extremely resistant, both to the storage media and to weather conditions.
  • Annular gap seals for floating roof tanks are usually subdivided into a primary seal and a secondary seal, whereby the primary seal facing the stored product is intended to retain the majority of the product vapors and the secondary seal directed against the atmosphere is intended to prevent the ingress of rainwater in addition to improving the overall sealing effect.
  • annular gap seals for indoor floating ceilings in fixed roof tanks only have the task of limiting product emissions.
  • leaf springs are provided as spring bands, which are arranged at large mutual distances, which means that thick spring bands are required. These thick spring bands are relatively stiff, offer considerable resistance to the elastic deformation and press the sealing profile at points onto the container wall. Due to the stiffness of the spring bands, the assembly of this known annular gap seal is very difficult.
  • the outer ends of the spring bands are pointed at an acute angle to the tank wall, which means that the hard sealing profile, which has only relatively small cross-sectional dimensions, can easily get stuck during vertical movements of the floating cover.
  • the known annular gap seal is designed only for the simultaneous primary and secondary sealing of a floating roof tank, the prestressing of the leaf spring legs lying up and down should be adjustable by a central fastening screw engaging in a vertical wall of the floating cover.
  • the attachment of the mounting holes required for this in the vertical wall of the floating cover is undesirable because such holes can cause leaks in the floating body.
  • the attachment points are no longer accessible after attaching the sealing apron, so that later spring settings only appear possible after removing the apron.
  • the invention has for its object to provide a preferably usable as a secondary seal for floating roof tanks and as an annular gap seal for internal floating ceilings of fixed roof tanks, which avoids the disadvantages of the known designs, especially with relatively low frictional forces, and uniform centering effect for the floating cover a maximum of flexibility, Sealing effect and operational safety with low corrosion sensitivity of the components used.
  • the spring strips are formed from thin, closely spaced strips of a corrosion-resistant and permanently resilient material, with their ends facing the floating cover are fastened to this approximately horizontally and below elastic deflection span the annular gap so that a spring band at its free end or a plurality of adjacent spring bands (6, 6 ') is or are connected at their free ends to a receiving profile piece (10, 10') open towards the tank wall, and that along A plurality of foam elements are arranged along the circumference of the container, which are butted against one another, each foam element being pressed against the tank wall by a plurality of receiving profile pieces (10, 10 ') sitting closely next to one another.
  • the annular gap seal according to the invention has a permanently high spring elasticity and a uniform centering effect for the floating cover.
  • the contact forces generated by the spring bands are evenly transmitted to the foam elements by means of the almost completely continuous receiving profile pieces.
  • the wide and soft elastic pressure of the outer sealing body ensures a high sealing effect with low frictional forces. Due to the spring bands that run practically parallel to the tank wall due to their deflection and the voluminous, soft and rounded outer sealing body, the risk of everting is eliminated. The individual spring straps are easily accessible without dismantling the sealing apron.
  • the arrangement is advantageously such that the receiving profile pieces have a substantially C-shaped cross section and an approximately perpendicular flange to the profile opening, to which the free ends of the spring strips are attached.
  • the cross-sectional design of the receiving profile pieces allows easy attachment of the individual foam elements to be joined into a ring, the flange which adjoins the profile opening approximately vertically allowing attachment to the free ends of the spring bands such that the spring bands are aligned with these free ends practically parallel to the tank wall, whereby a considerable radially directed elasticity of the annular gap seal is achieved without the risk of being turned inside out or getting caught.
  • the free ends of the spring strips protrude into the profile opening of the receiving profile pieces and, together with an opposing profile bend, form a claw-like holder for the foam elements.
  • the foam elements are preferably designed for use on a secondary seal in such a way that they are chamfered in cross-section on their side facing the tank wall in such a way that they have the shape of an upward direction when not pressed have blunt wedges.
  • the chamfer ensures that the top edge of the outer sealing body is always pressed firmly against the tank wall, even when the gap narrows, and a sufficiently wide sealing surface is created.
  • the free ends of two to six adjacent spring bands are expediently fastened to a receiving profile piece.
  • two to six spring bands and a receiving profile piece form a spring unit.
  • the spring strips are made of stainless spring steel sheet and the receiving profile pieces made of stainless steel sheet.
  • the annular gap seal 2 is used above a conventional primary seal, not shown.
  • the thin and closely spaced spring bands 6 are fastened by means of screws 7 and with the interposition of a terminal block 8.
  • the sealing apron 9 which runs endlessly around the entire annular gap, is fastened on the one hand to the receiving profile pieces 10, is knocked against the tank wall around the foam elements 14 and is fastened at the other end to the horizontal flange 5.
  • the spring strips 6 consist of approximately 1 mm thick and approximately 100 to 200 mm wide sheet metal strips made of stainless spring steel.
  • three spring bands 6 are combined to form a spring element by a receiving profile piece 10 with a C-shaped cross section.
  • the receiving profile pieces 10 have an approximately perpendicular to the profile opening flange 11, to which the free ends of the spring bands 6 are attached at 12 from the outside.
  • the spring strips 6 are connected to the receiving profile pieces 10 in such a way that a short end piece 13 of the spring strips projects into the C-profile and holds the foam elements 14 in a claw-like manner in cooperation with an opposite profile bend 15.
  • the foam elements 14, each passing through a plurality of receiving profile pieces 10 and made from a flexible polyurethane foam, have an approximately square, rectangular or rhombic cross section, for example the cross section shown in FIG. 3.
  • the foam elements 14 are provided on their side facing the tank wall with a chamfer 16, so that the shape of an upward blunt wedge is formed. This ensures that the outer sealing body always rests with its upper edge on the tank wall 1 even when the gap has become narrower and that the water running down the tank wall in rain is pushed away from the tank wall without a larger storage space being able to form over the seal.
  • the sealing apron 9 is made of a fabric-reinforced rubber material or plastic with high flexibility and abrasion resistance. In addition to the attachment to the floating roof 4 already described, the sealing apron 9 is attached to the rear of the receiving profile pieces 10 by means of adhesive strips 17 at 18.
  • FIG. 2 shows the annular gap seal 2 'between the vertical container wall 1' and the inner floating ceiling 4 'of a fixed roof tank, the fill level of which is indicated by the level line 19.
  • Comparable components are designated with the reference numbers used for FIG. 1, which, however, are provided with an index line.
  • the spring bands 6 ' are bent downwards against the tank wall 1'.
  • the foam elements 14 ' have an approximately square cross section in the unpressed form.
  • the sealing apron 9 ' is clamped at the connection point between the flange 11' and the spring strips 6 'by means of clamping strips 17', folded down around the foam elements 14 'and below the spring strips 6' on the outer edge flange 5 ' Inner floating ceiling 4 'fastened by screws 7' and terminal strips 8 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Building Environments (AREA)
EP82110463A 1981-11-19 1982-11-12 Moyen d'étanchéité pour l'espace annulaire entre la paroi d'un réservoir et le toit flottant d'un grand réservoir de stockage Expired EP0080130B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813145753 DE3145753A1 (de) 1981-11-19 1981-11-19 Vorrichtung zur abdichtung des ringspalts zwischen behaelterwand und schwimmender abdeckung eines grossraumbehaelters
DE3145753 1981-11-19

Publications (2)

Publication Number Publication Date
EP0080130A1 true EP0080130A1 (fr) 1983-06-01
EP0080130B1 EP0080130B1 (fr) 1987-04-22

Family

ID=6146665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82110463A Expired EP0080130B1 (fr) 1981-11-19 1982-11-12 Moyen d'étanchéité pour l'espace annulaire entre la paroi d'un réservoir et le toit flottant d'un grand réservoir de stockage

Country Status (2)

Country Link
EP (1) EP0080130B1 (fr)
DE (2) DE3145753A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU577763B2 (en) * 1985-08-05 1988-09-29 Chicago Bridge & Iron Co. Floating roof for large container with flexible seal
WO1990008076A1 (fr) * 1989-01-17 1990-07-26 Kuil Piet Hugo Alphonsus V D Systeme d'etanchement de paroi de reservoir mobile
FR2776274A1 (fr) * 1998-03-17 1999-09-24 Emmanuel Schiffmann Dispositif pour le stockage sous-marin des effluents d'un gisement petrolier sous-marin
EP1106533A1 (fr) 1999-12-09 2001-06-13 Ingenieurbüro Imhof GmbH Dispositif pour rendre etanche une fente annulaire
DE102004001206A1 (de) * 2004-01-06 2005-08-04 Heinrich Imhof Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer schwimmenden Abdeckung
CN115924330A (zh) * 2022-12-20 2023-04-07 河北珠峰仪器仪表设备有限公司 一种储罐内壁与浮盘全封闭装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6247607B1 (en) * 1998-12-18 2001-06-19 Hmt Inc. Low profile secondary seal
DE102016100649B4 (de) * 2016-01-15 2021-12-30 Kompoferm Gmbh Thermischer Energiespeicher in Form eines Flachbodentanks

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437125A (en) * 1944-09-09 1948-03-02 Hammond Iron Works Floating roof for tanks
US2571817A (en) * 1947-04-09 1951-10-16 Stacey Brothers Gas Constructi Seal for fluid containers
GB1445996A (en) * 1973-11-02 1976-08-11 Greengate Ind Polymers Ltd Floating roofs for liquid storage tanks
DE3007389A1 (de) * 1979-03-06 1980-09-18 Huber & Suhner Ag Schwimmende tankabdichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437125A (en) * 1944-09-09 1948-03-02 Hammond Iron Works Floating roof for tanks
US2571817A (en) * 1947-04-09 1951-10-16 Stacey Brothers Gas Constructi Seal for fluid containers
GB1445996A (en) * 1973-11-02 1976-08-11 Greengate Ind Polymers Ltd Floating roofs for liquid storage tanks
DE3007389A1 (de) * 1979-03-06 1980-09-18 Huber & Suhner Ag Schwimmende tankabdichtung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU577763B2 (en) * 1985-08-05 1988-09-29 Chicago Bridge & Iron Co. Floating roof for large container with flexible seal
WO1990008076A1 (fr) * 1989-01-17 1990-07-26 Kuil Piet Hugo Alphonsus V D Systeme d'etanchement de paroi de reservoir mobile
FR2776274A1 (fr) * 1998-03-17 1999-09-24 Emmanuel Schiffmann Dispositif pour le stockage sous-marin des effluents d'un gisement petrolier sous-marin
EP1106533A1 (fr) 1999-12-09 2001-06-13 Ingenieurbüro Imhof GmbH Dispositif pour rendre etanche une fente annulaire
DE19959359A1 (de) * 1999-12-09 2001-07-05 Imhof Ingbuero Gmbh Vorrichtung zum Abdichten eines Ringspalts
DE102004001206A1 (de) * 2004-01-06 2005-08-04 Heinrich Imhof Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer schwimmenden Abdeckung
DE102004001206A8 (de) * 2004-01-06 2005-11-17 Heinrich Imhof Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer schwimmenden Abdeckung
DE102004001206B4 (de) * 2004-01-06 2006-05-04 Heinrich Imhof Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer schwimmenden Abdeckung
CN115924330A (zh) * 2022-12-20 2023-04-07 河北珠峰仪器仪表设备有限公司 一种储罐内壁与浮盘全封闭装置
CN115924330B (zh) * 2022-12-20 2023-07-04 河北珠峰仪器仪表设备有限公司 一种储罐内壁与浮盘全封闭装置

Also Published As

Publication number Publication date
DE3145753A1 (de) 1983-05-26
EP0080130B1 (fr) 1987-04-22
DE3276107D1 (en) 1987-05-27

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