EP2966010B1 - Récipient cylindrique avec un système d'étanchéification pour l'espace annulaire entre la paroi du récipient et une paroi externe d'un flotteur recouvrant - Google Patents

Récipient cylindrique avec un système d'étanchéification pour l'espace annulaire entre la paroi du récipient et une paroi externe d'un flotteur recouvrant Download PDF

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Publication number
EP2966010B1
EP2966010B1 EP14002318.5A EP14002318A EP2966010B1 EP 2966010 B1 EP2966010 B1 EP 2966010B1 EP 14002318 A EP14002318 A EP 14002318A EP 2966010 B1 EP2966010 B1 EP 2966010B1
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EP
European Patent Office
Prior art keywords
seal
wall
floating cover
membrane
container wall
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Not-in-force
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EP14002318.5A
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German (de)
English (en)
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EP2966010A1 (fr
Inventor
Heinrich Imhof
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Individual
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Individual
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Publication of EP2966010A1 publication Critical patent/EP2966010A1/fr
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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

  • the present invention relates to a vertical round container, which is filled with a liquid, with a container wall and a floating cover wherein an annular gap is formed between the container wall and an outer wall of the floating cover, and with a sealing arrangement for sealing the annular gap according to the preamble of claim 1 ,
  • Such sealing arrangements are used in large-volume tank containers of the petrochemical and should avoid that between the vertical wall of the round container and the cover, which floats on the liquid stored in the circular container, rainwater from the outside penetrates and evaporations of volatile and combustible liquids from the annular gap between Leave container and the cover and pose an environmental impact and fire hazard.
  • Known sealing arrangements are constructed so that they begin in the region of the stored liquid with a voltage applied to the container wall and immersed in the liquid sliding plate ring large height. Above this gland seal, additional, separate seals may adjoin the vessel wall, including a secondary seal and a tertiary seal.
  • one or more fabric-reinforced sealing membranes are provided, spanning the annular gap from the container wall to the floating cover by being sealingly clamped on the one hand to the sealing elements abutting against the container wall and on the other hand to the outer wall of the floating cover.
  • the US, 5,529,200 (Chicago Bridge) describes a sealing arrangement for the annular gap between a container wall and a floating roof, as used to this day.
  • a sliding plate forms the seal on the container wall.
  • This sliding plate is pressed by a scissor-shaped and oversized support system to the container wall, so that the area of the annular gap between the container wall and floating roof is installed such that in the depth of the annular gap no room for more and more effective sealing body is present.
  • the US 3,565,279 (Joor) describes a sealing system for floating roofs, which uses a narrow foam padding element as a sealing body against the container wall over the entire height of the floating roof.
  • the lower portion of the sealing body dips into the bearing fluid and is therefore exposed to various risks. These include lack of chemical resistance and mechanical strength of the membrane materials and the possible accumulation of product in the material of the sealing body. It is not known that this sealing system came into practical use.
  • FIG. 5 describes a seal arrangement for the annular gap between the container wall of a circular container intended for a liquid and a floating ceiling or a floating roof, which serve as a support for the seal assembly and the same time.
  • This seal assembly comprises a multi-membered, consisting of thin-walled sliding plates and applied to the container wall primary sealing ring. The slide plates dip with their lower edges into the liquid stored in the container.
  • Above the primary sealing ring is a secondary sealing ring in the form of a cushion ring with large vertical extension. A sealing membrane of this secondary sealing ring abuts the container wall.
  • the sealing elements are supported by support elements and pressed by pressing on the container wall, which extend between the side wall of the floating roof and the seal assembly.
  • a flexible sealing membrane spans the annular gap between the container wall and floating ceiling or floating roof.
  • This seal arrangement allows due to the large-sized pad ring a good sealing effect and also avoids that the soft material body of the secondary seal comes into contact with the storage liquid.
  • all container wall-side primary and secondary sealing parts must be pre-assembled and drained as a closed ring in the annular gap, since the support elements only engage the secondary seal. This mounting requirement leads to very high installation costs. Due to the position of the support element no sealing membrane can be used over the height of the support element.
  • the JP 61 147785 U shows in the FIGS. 1 and 2 a sealing arrangement for the annular gap between a container wall and the side wall of a floating cover with a plate-shaped primary seal and a pillow-like secondary seal.
  • the plate-shaped primary seal is angled in the upper part, that it is spaced from the container wall, wherein between this angled part and the container wall, a pillow-shaped secondary seal is arranged.
  • a support arm assembly is positioned, which is supported on the one hand to the primary seal and the other on the side wall of the floating cover. The support arm assembly fills the entire space between the container wall and floating cover. Between the upper edge of the side wall of the floating cover and the point at which the plate-shaped primary seal is angled, a seal spanning the annular gap is arranged.
  • the WO 96/208886 A1 describes a sealing system for a cylindrical reservoir having a floating roof comprising a primary seal and a secondary seal secured to an edge extending upwardly from the floating roof.
  • the system for fixing the seals to the floating roof has a bolt, a retaining part for fixing the primary seal to the edge and a nut for fixing the secondary seal to the edge, the attachment or removal of the secondary seal does not affect the connection of the primary seal.
  • the EP 0 122 591 A2 going back to the assignee of the present application, describes a device for sealing the annular gap between a container wall and a floating cover of a large-capacity container.
  • the sealing device consists of a plurality of equally spaced apart at the periphery of the floating cover fixed spring elements which bridge the annular gap under spring tension and press with their free ends an annularly closed, outer sealing element against the container wall.
  • the annular gap is closed by a sealing skirt running around the entire annular gap between the outer sealing element and the floating cover.
  • the spring elements consist of U-shaped spring clips, which are fastened with the one leg on the outer edge of the floating cover. On the other leg, the outer sealing element is rigidly connected.
  • the sealing element resting against the container wall is held by the spring elements with respect to a horizontal plane above the edge of the floating cover.
  • a sealing apron is attached between the upper edge of the floating cover and the sealing element, below the spring elements.
  • the US 4,811,859 A describes a sealing element for the annular gap between a floating roof and the container wall of a container for storing a liquid.
  • a primary seal is attached, which partially rests flat against the container wall.
  • a secondary seal is located above the primary seal and is held by a flange which is also secured to the top of the floating roof.
  • the present invention has for its object to provide a seal assembly for the annular gap between the container wall of a vertical round container and a floating cover associated outer wall, with the maximum relatively low overall height and thus small tank loss space maximum sealing effect is achieved and allows easy installation ,
  • the sealing arrangement which is provided for the annular gap between the container wall of a vertical round container intended for a liquid and an outer wall of a floating cover, comprises at least one primary seal extending in the circumferential direction of the container wall and having at least one sliding plate. Above the primary seal, a secondary seal is positioned, which runs in the circumferential direction of the vessel wall. The secondary seal is connected to the primary seal container wall side. Furthermore, at least one of a sealing membrane container wall side covered soft foam element is provided. The primary seal and the secondary seal are held by the at least one support system at a defined height to the liquid level, wherein the support system and at least one pressing element on the outer wall the floating cover are attached.
  • At least one first sealing membrane is provided, which spans the annular gap from the upper end of the secondary seal to an upper edge of a floating cover.
  • the construction height of the secondary seal is dimensioned so that the height of the secondary seal is at least half the height of the sliding plate of the primary seal.
  • the at least one support system engages the sliding plate of the primary seal and holds the primary seal so that its upper edge is oriented directly above the maximum possible immersion depth of the floating cover.
  • a second sealing membrane is arranged between the secondary seal and the outer wall of the floating cover.
  • the secondary seal is pressed by a further spring element to the container wall, which is fixed to the upper end of the floating cover.
  • the at least one support system can be dimensioned with a small vertical extent and the support system engages the sliding plate of the primary seal.
  • the support element is arranged in the lower region of the outer wall of the floating cover, whereby the vertically arranged above secondary seal can be designed with a large height, without thereby the usable container volume is significantly affected.
  • the inventive measures the knowledge is used that the sealing effect between a container wall and a sliding plate is at least three times worse than the sealing effect between a container wall and a suitable secondary seal (for example, a soft foam sealing body) at the same contact height on the container wall. For this reason, the available space for the secondary seal is optimized, so that the height of the secondary seal is at least so large that it corresponds to half the height of the sliding plate of the primary seal.
  • a suitable secondary seal for example, a soft foam sealing body
  • the entire sealing system can be gradually and inexpensively from bottom to top, starting with the assembly of the primary seal on the support system on the floating cover, built.
  • the support system is composed of a plurality of support elements which are arranged in the lower half with respect to the height of the outer wall of the floating cover.
  • the sealing arrangement has at least one second sealing membrane.
  • This second sealing membrane is at one end or with its one side, seen in the circumferential direction of the container, sealingly clamped at the transition point between the sliding plate of the primary seal and the secondary seal and is at its other end or with its other side, in the circumferential direction of the floating Cover seen, sealingly clamped to the outer wall.
  • clamping rails are used.
  • the same bolt row can be used for the floating roof-side clamping of the second sealing membrane and for fastening the secondary pressure springs, the second sealing membrane can be clamped at the upper edge of the outer wall of the floating cover.
  • the second sealing membrane may be jammed about halfway up the outer wall of the floating cover; This measure is advantageous if there from an existing floating cover the required row of bolts already exists.
  • a pressure spring is attached to the upper end of the outer wall of the floating roof, together with the secondary sealing membrane, which presses the secondary seal against the container wall.
  • the sliding plate is in the upper region up to its upper edge on the container wall and has on the side facing away from the container wall threaded bolt.
  • the secondary seal can be covered on its side facing the floating cover by a support plate.
  • This support plate is then connected with its lower edge directly to the sliding plate of the primary seal, so that the sliding plate of the primary seal and the support plate of the secondary seal form a coherent, stable unit.
  • the support plate receives at the lower end two folds to bridge the thickness of the cushion member and again just apply to the upper end of the sliding plate.
  • the second sealing membrane and the flexible membrane covering the sealing membrane are formed from a blank. This minimizes the number of membrane blanks and the locations of possible membrane leaks.
  • the first sealing membrane and the second sealing membrane and the soft foam element covering the sealing membrane may be formed from a blank, wherein the two ends of this blank are attached to the floating cover sealed against them.
  • the sliding plate of the primary seal has at the bottom of a fold to the floating roof out. At the upper, straight end of the sliding plate threaded bolts are provided in this embodiment on the side facing away from the container wall, where the secondary seal is screwed to the primary seal.
  • both on the sliding plate of the primary seal attacking and acting on the support plate of the secondary seal horizontally aligned spring elements are provided so that the sliding plate and the secondary seal on the support plate of the Side wall of the floating cover to be pressed in the direction of the container wall.
  • the sliding plate of the primary seal is at least on the height of the immersion line of the floating cover pressed against the container inner wall.
  • Submersible line means that line up to which the floating cover is immersed in the storage liquid, also taking into account an additional environmental surface load to be absorbed by the floating roof, caused for example by snow or rainwater, and the lowest density of possible storage liquid.
  • Sliding plate and support plate can be integrally formed as a sliding support plate.
  • the pressing of the secondary seal can take place both from below and above the secondary seal.
  • the secondary seal leaf springs are preferably used with U-shaped shape. Such a pressure spring engages the end of a short leg at the upper end of the secondary seal, while the end of a long leg is secured to the upper edge of the floating roof.
  • the first sealing membrane and the second sealing membrane can be attached to the outer wall of the floating cover by means of double-sided (at both ends) usable threaded bolt parts.
  • the first sealing membrane is attached to the side facing away from the container wall of the threaded bolt part and the second sealing membrane is attached to the container wall side facing the threaded bolt part.
  • the sliding plates and the support plates are sheet metal parts which are angled, slotted vertically at short intervals, so that the sliding plates and the support plates can follow the radius of the container inner wall tension-free.
  • the first sealing membrane and the second sealing membrane can be clamped on each other at the upper edge of the floating roof, so that the connection points be minimized with a corresponding reduction in assembly costs and a reduction in the areas to be sealed.
  • the flexible foam plates can be arranged in an advantageous manner in the secondary region of the sliding and support plates in front of the sliding and support plates, and the membrane enclosing the flexible foam plates ends at the upper end of the Gleitblechteils and is clamped there by means of terminal strips with the sliding plate.
  • the seal assembly has a tertiary seal above the annular gap, which is connected to the secondary seal container side and is pressed by a U-shaped pressure spring against the container wall.
  • a support scissors is used as the support system, which extends from a pivot point on the floating cover to a higher pivot point on the sliding plate of the primary seal support arm and a pull arm extending from a pivot point on the support arm to a higher pivot point on the floating Cover extends, has.
  • the pivot point of the pull arm on the support arm divides this support arm into an upper first support arm portion which is connected to the pivot point on the sliding plate, and a lower second support arm portion which is connected to the pivot point on the floating cover, wherein the Length of the first support arm portion is greater than the length of the pull arm.
  • the sealing arrangements, as in the FIGS. 1 to 4 are illustrated and described below, are generally designated by the reference numeral 10. They serve to seal an annular gap 9 between the container wall 2 of a vertical round container 1, in which a liquid 3 is stored, and the outer wall 8 of a floating on the liquid 3 cover 5.
  • the adjusting in the round container 1 liquid level is denoted by the reference numeral 4th designated.
  • the floating cover 5, which may also be referred to as a floating roof or floating ceiling, has a lower floor or floor panel 6, an upper floor or a cover sheet 7, and the outer wall 8.
  • the seal assembly is, apart from the endless surrounding the entire circumference of the container 1 sealing membranes, composed of several, the inner circumference of the container 1 in the circumferential direction associated segments.
  • Each segment has at least one lower seal or primary seal 11 and one upper seal or secondary seal 12.
  • Primary seal 11 and secondary seal 12 are designed ring-segment-shaped according to the geometry of the container wall 2 of the container 1 and arranged one above the other.
  • the primary seal 11 of each segment comprises at least one sliding plate 13, while the secondary seal 12 of the segment positioned above the primary seal 11 comprises at least one soft foam element 15.
  • the sliding plates 13 are seen in the circumferential direction of the container 1 and the container wall 2 with a small mutual overlap side by side and have at their lower ends in each case a fold 13b to the floating roof 5 out.
  • the sliding plates 13 have a vertical height which corresponds to about half to two thirds of the height of the outer wall 8 of the floating roof 5.
  • the sliding plate 13 is made of thin-walled steel sheet having a thickness of 1 mm to 1.5 mm.
  • the soft foam element 15 of the secondary seal 12 is covered on its side facing the container wall 2 by a sealing membrane 16, while on its side facing away from the container wall 2 or on the side facing the floating roof 5 is covered by a support plate 14, in which it also can act to a steel sheet according to the material of the sliding plate 13.
  • Primary seal 11 and secondary seal 12 of the individual segments of the seal assembly 10 are supported by support members 26 and pressure elements 28, 29 (Andrückfedern) and pressed against the container wall 2 of the round container 1 with the respective sliding plate 13 and the respective sealing membrane 16.
  • the support member 26 is formed as a three-armed support scissors, while the pressing elements 28, 29 are designed as horizontally oriented leaf springs, which are preferably bent in a U-shape or C-shaped.
  • the primary seal 11 and the secondary seal 12 are held by the support elements 26 at a defined height to the maximum possible immersion depth 4 'or the normally adjusting liquid level 4 such that the upper edge 17 of the primary seal 11 above the maximum possible immersion depth 4 'of the floating cover 5 is oriented.
  • this positioning of the primary seal 11 and the secondary seal 12 is to be considered that the maximum possible immersion depth 4 ', taking into account additional environmental surface loads, such as snow loads and loads caused by rainwater, and the lowest possible density of the storage liquid results. This ensures that only the primary seal 11 and thus their fitting against the container wall 2 sliding plate 13th penetrates into the liquid, so that the much more sensitive by the inserted soft foam element 15 secondary seal 12 is held outside the liquid 3.
  • the upper edge 13a of the sliding plate 13 of the primary seal 11 and / or the support plate 14 of the secondary seal 12, which covers the cushion element 15, folded and bolted together, as shown in the FIGS. 1 . 2 and 4 is shown, or this fold is formed in the sheet when the Gleitblechteil 13 of the primary seal 11 and the support plate member 14 of the secondary seal 12 are formed of a sheet metal contiguous.
  • a first sealing membrane 21 and a second sealing membrane 20 are provided which comprise the entire circumference of the container 1 in one piece.
  • the first sealing membrane 21 spans the annular gap 9 from the upper end of the secondary seal 12 to the upper edge 22 of the floating cover 5. It is attached to the secondary seal 12 at an upper fold 19 of the support plate 14 by means of a terminal block 19a and screw 19b sealed.
  • this first sealing membrane 21 is at the upper end 22 of the outer wall 8, which projects over the surface of the cover plate 7, seen in the vertical direction, screwed by threaded bolts 24 on the inside of the upper end and sealed by means of clamping profile 25.
  • precipitation water which impinges on the region between the container inner wall and the cover 5 is discharged to the cover plate 7 of the cover 5.
  • the second sealing membrane 20 is fixed on the one hand at the transition point between the primary seal 11 and secondary seal 12 in the region of the folds 17 and on the other hand at the upper end 22 of the floating cover 5. While the first sealing membrane 21 is fixed on the inside of the upper end of the outer wall 8 of the cover 5, the second sealing membrane 20 on the outside of this end 22 by threaded bolts 23 and clamping profiles 25 ', which are located on this outside, screwed.
  • a screw 18 can be used with which the sliding plate 13 of the primary seal 11 and the support plate 14 of the secondary seal 12 are connected to each other.
  • the respective support elements 26 comprise a guide part 26a, for example a U-rail, which, starting at the lower end of the outer wall 8 of the floating cover 5 in the region of the floor panel 6, extends approximately over half the height of the cover 5.
  • the support element 26 further comprises a tensile member or a traction arm 26c and a support member or a support arm 26d.
  • the tension member 26c is pivotally connected at one end thereof to the upper end of the guide member 26a (pivot point 26h) and pivotally connected at its other end to approximately the center of the support member 26d (pivot point 26i); through the pivot point 26i, the support member is divided into a first portion 26e and a second portion 26f.
  • the support member 26d is pivotally and slidably guided in its other end in a vertical slot 26b (pivot point 26g) and is pivotally attached at its other end to a bearing block 27 (pivot point 26h).
  • the bearing block 27 and thus the point of engagement of the support member 26 d of the support member 26 is located in the region of the upper half of the height of the sliding plate thirteenth
  • the secondary seal 12 projects beyond the upper end 22 of the cover 5 in the case of the illustrated double sealing (primary and secondary) of the annular gap 9 for the purpose of discharging the precipitates Floating 5 out. If an additional tertiary seal 60, the only in FIG. 4 is shown above the secondary seal 12 is used, the secondary seal 12 may have a lower overall height, so that the overall construction height of the sealing system is limited. In the case of the illustrated double seal with primary seal 11 and secondary seal 12, the height of the secondary seal 12 should be about 1/3 to 1/2 of the total height of the seal assembly 10.
  • FIG. 1 is a broken line, denoted by the reference numeral 20 ', a further possibility of positioning the second sealing membrane 20 is shown.
  • the end of the second sealing membrane 20 is not attached to the upper end of the outer wall 8, but via fastening elements 23 ', which are arranged approximately at half the height of the outer wall 8.
  • This position of the second sealing membrane 20 ' should be used when threaded bolts are present at an appropriate location by an earlier sealing system, while the position of the sealing membrane 20 is preferred when only mounting options are offered at the upper floating roof end.
  • FIG. 2 an embodiment of the seal assembly according to the invention is shown, which is suitable for installation in a solid roof tank with réelleschwimmdecke, with an indoor floating ceiling usually has a significantly lower height than an external floating roof. It differs from the embodiment of the FIG. 1 with respect to the support member 26 and the attachment of the first sealing membrane 21 to the floating cover 5.
  • the support element 26 of FIG. 2 is opposite to the support member 26 of the FIG. 1 modified so that the guide part 26a is fixed to the outer wall 8 of the cover 5 with only the upper half of its length, so that the lower half, as seen in the vertical direction, protrudes downwards over the floor panel 6.
  • the parts of the support member 26 can thereby immerse deep into the liquid for the purpose of height reduction.
  • the bearing block 27 is above the liquid level 4 of the container liquid 3, and the primary seal 11 is held by the support member 26 so that the upper end of the primary seal 11 and thus the adjoining secondary seal 12 above the liquid level. 4 are located; Also in this embodiment, it is thus ensured that no parts of the secondary seal 12 dip into the liquid 3.
  • Another advantage of the embodiment of FIG. 2 is the lower height of the seal assembly 10. It is thus suitable for lowest heights of the floating cover.
  • the attachment of the first sealing membrane 21 takes place in the embodiment of FIG. 2 on a horizontal flange ring, which points to the center of the container, and the second sealing membrane 20 is attached to the vertical upper end of the outer wall 8 via a clamping profile, which is designated by the reference numeral 25 '.
  • the horizontal flange 31 serves to stiffen the outer wall. 8
  • the embodiment, as in FIG. 3 is shown essentially corresponds to the structure of FIG. 1 , but with an additional, U-shaped or S-shaped curved pressure spring 50 and a further horizontally oriented leaf spring 51, which is arranged in the upper region of the sliding plate 13.
  • the pressure spring 50 has a short leg 53 and a long leg 54, wherein the short leg 53 engages the upper end of the secondary seal 12 and the long leg 54 is attached to the upper edge of the cover 5.
  • the pressure spring 50, the first sealing membrane 21 and the second sealing membrane 20 are fastened to the horizontal flange 31 via the same screw elements 33. With these additional pressure springs 50 and 51 it is achieved that the secondary seal 12 is sufficient Pressure experiences, although there is no possibility of attachment for a horizontally directed pressure spring 29 at the upper end of the outer wall 8.
  • a pressure spring 50 is required.
  • the secondary seal 12 is clamped by means of screws 19b and clamping profile 19a, both the primary apron 21 and a Wasserabstreifer 55 with the upper edge 19 of the support plate 14.
  • the pressure spring 50 ensures sufficient pressure of the water scraper 55 against the container wall. 2
  • Fig. 4 3 shows a unitized triple seal consisting of a primary seal 11 and a secondary seal 12, respectively Fig. 1 , as well as a tertiary seal 60, which is coupled to the container disposed thereunder double seal 11, 12 by a rigid connecting element 62.
  • the Tertiärdichtung 60 is pressed by a U-shaped or S-shaped pressure spring 50 'against the container wall 2.
  • the permissible overall height of the seal assembly 10 is determined by the required or existing height of the foam wall 70, dimensioned for a secure overlap of the seal assembly with foam in case of fire. This may make it necessary to limit the height of the secondary seal 12.
  • the tertiary seal 60 likewise has a padding element 65 filled with soft foam elements 65 and is likewise equipped with a sealing membrane 61 spanning the annular gap 9.

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  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (12)

  1. Réservoir circulaire vertical (1), qui est rempli avec un liquide, comprenant une paroi de réservoir (2) et un couvercle de recouvrement flottant (5), réservoir circulaire
    dans lequel entre la paroi de réservoir (2) et une paroi extérieure (8) du couvercle de recouvrement flottant (5) est formé un interstice annulaire (9), et un agencement d'étanchéité (10) est prévu pour assurer l'étanchéité de l'interstice annulaire (9),
    dans lequel l'agencement d'étanchéité (10) comprend au moins un joint d'étanchéité primaire (11) s'étendant dans la direction périphérique de la paroi de réservoir (2) et comportant au moins une tôle de glissement (13), au moins un joint d'étanchéité secondaire (12),
    qui est positionné au-dessus du joint d'étanchéité primaire (11) et s'étend dans la direction périphérique de la paroi de réservoir (2), et qui est relié au joint d'étanchéité primaire (11) du côté de la paroi de réservoir, et au moins un élément de mousse souple (15) recouvert du côté de la paroi de réservoir par une membrane étanche (16), et au moins un système de support (26, 26a - 26f) et au moins un ressort d'application (28), qui sont fixés sur la paroi extérieure (8) du couvercle de recouvrement flottant (5),
    dans lequel le joint d'étanchéité primaire (11) et le joint d'étanchéité secondaire (12) sont maintenus par ledit au moins un système de support (26, 26a - 26f) à une hauteur définie par rapport au niveau de liquide (4, 4'), et le ressort d'application (28) est associé au joint d'étanchéité primaire (11), et au moins une première membrane d'étanchéité (21) couvre l'interstice annulaire (9) en s'étendant de l'extrémité supérieure (19) du joint d'étanchéité secondaire (12) à un bord supérieur (22) du couvercle de recouvrement flottant (5),
    et dans lequel la hauteur de construction du joint d'étanchéité secondaire (12) a une dimension au moins égale à la moitié de la hauteur de construction de la tôle de glissement (13) du joint d'étanchéité primaire (11),
    caractérisé
    en ce que ledit au moins un système de support (26, 26a - 26f) agit au niveau de la tôle de glissement (13) du joint d'étanchéité primaire (11) et maintient le joint d'étanchéité primaire (11) de manière telle que son bord supérieur (17) soit situé directement au-dessus de la profondeur d'immersion maximale possible (4, 4') du couvercle de recouvrement flottant (5), en ce que dans la zone de l'interstice annulaire (9), entre le joint d'étanchéité secondaire (12) et la paroi extérieure (8) du couvercle de recouvrement flottant (5) est agencée une deuxième membrane d'étanchéité (20, 20'), en ce que le joint d'étanchéité secondaire (12) est appliqué par un ressort d'application supplémentaire (29, 50), qui est fixé à l'extrémité supérieure (22) du couvercle de recouvrement flottant (5), en ce que la deuxième membrane d'étanchéité (20, 20') est enserrée de manière étanche, par une de ses extrémités, au niveau de la zone de transition entre la tôle de glissement (13) du joint d'étanchéité primaire (11) et le joint d'étanchéité secondaire (12), et est d'autre part enserrée avec son autre extrémité, sur la paroi extérieure (8) du couvercle de recouvrement flottant (5), et en ce que le système de support (26) comprend plusieurs éléments de support (26a - 26f), qui sont agencés dans la moitié inférieure relativement à la hauteur de la paroi extérieure (8) du couvercle de recouvrement flottant (5).
  2. Réservoir circulaire selon la revendication 1, caractérisé en ce que la deuxième membrane d'étanchéité (20) est enserrée, côté couvercle flottant, sur le bord supérieur (22) de la paroi extérieure (8) du couvercle de recouvrement flottant (5).
  3. Réservoir circulaire selon la revendication 1, caractérisé en ce que la deuxième membrane d'étanchéité (20') est enserrée, côté couvercle flottant, environ à mi-hauteur sur la paroi extérieure (8) du couvercle de recouvrement flottant (5).
  4. Réservoir circulaire selon l'une des revendications 1 à 3, caractérisé en ce qu'à l'extrémité supérieure de la paroi extérieure (8) du couvercle de recouvrement flottant (5), est fixé, en étant agencé entre la première membrane d'étanchéité (21) et la deuxième membrane d'étanchéité (20, 20'), ledit ressort d'application supplémentaire (29), qui applique le joint d'étanchéité secondaire (12) contre la paroi de réservoir (2).
  5. Réservoir circulaire selon l'une des revendications 1 à 4, caractérisé en ce que la tôle de glissement (13), dans la zone supérieure, au niveau de la zone de transition entre le joint d'étanchéité primaire (11) et le joint d'étanchéité secondaire (12), s'appuie jusqu'à son bord supérieur (13a) contre la paroi de réservoir (2), et présente des broches filetées (18) sur son côté opposé à celui dirigé vers la paroi de réservoir (2).
  6. Réservoir circulaire selon l'une des revendications 1 à 5, caractérisé en ce que l'élément de mousse souple (15) du joint d'étanchéité secondaire (12) est recouvert sur son côté opposé à celui dirigé vers la paroi de réservoir (2), par une tôle d'appui (14), qui, à son extrémité inférieure s'appuie, par un premier pliage (17) vers la paroi de réservoir et un deuxième pliage (17a) vers la verticale, contre l'extrémité supérieure (13a) de la tôle de glissement (13).
  7. Reservoir circulaire selon l'une des revendications 1 à 6, caractérisé en ce qu'au moins deux parmi la deuxième membrane d'étanchéité (20, 20'), la première membrane d'étanchéité (21) ainsi que la membrane étanche (16), sont formées en un seul flan de découpe.
  8. Réservoir circulaire selon l'une des revendications 1 à 7, caractérisé en ce que la première membrane d'étanchéité (21) et la deuxième membrane d'étanchéité (20) peuvent être fixées, au moyen de pièces de broches filetées (23, 24), à la paroi extérieure (8) du couvercle de recouvrement flottant (5), la première membrane d'étanchéité (21) étant fixée sur le côté de la pièce de broche filetée (24), qui est opposé à celui dirigé vers la paroi de réservoir (2), et la deuxième membrane d'étanchéité (20) est fixée sur le côté de la pièce de broche filetée (23), qui est dirigé vers la paroi de réservoir (2).
  9. Réservoir circulaire selon l'une des revendications 1 à 8, caractérisé en ce que la première membrane d'étanchéité (21) et la deuxième membrane d'étanchéité (20) sont enserrées de manière superposée au niveau du bord supérieur du couvercle de recouvrement flottant (5).
  10. Réservoir circulaire selon l'une des revendications 1 à 9, caractérisé en ce que ledit ressort d'application supplémentaire (50) est un ressort d'application supplémentaire (50) coudé en forme de U, qui agit sur le joint d'étanchéité secondaire (12) et qui présente une branche courte (53) et une branche longue (54), la branche courte (53) agissant à l'extrémité supérieure du joint d'étanchéité secondaire (12), et la branche longue (54) agissant au niveau du bord supérieur du couvercle de recouvrement flottant (5).
  11. Réservoir circulaire selon l'une des revendications 1 à 10, caractérisé en ce qu'il est prévu au-dessus de l'interstice annulaire, un joint d'étanchéité tertiaire (60), qui est relié, du côté de la paroi de réservoir, au joint d'étanchéité secondaire (12), et est appliqué par un ressort d'application de joint tertiaire (50') en forme de U, contre la paroi de réservoir (2).
  12. Réservoir circulaire selon l'une des revendications 1 à 11, caractérisé en ce que concernant le système de support (26), on utilise un pantographe de support (26a - 26f) qui comprend un bras d'appui (26d) s'étendant d'un point d'articulation (26g) sur le couvercle de recouvrement flottant (5) à un point d'articulation (26h) situé plus haut sur la tôle de glissement (13) du joint d'étanchéité primaire (11), ainsi qu'un bras de traction (26c) s'étendant d'un point d'articulation (26i) sur le bras d'appui (26d) à un point d'articulation (26k) situé plus haut sur le couvercle de recouvrement flottant (5), le point d'articulation (26i) du bras de traction (26c) sur le bras d'appui (26d), subdivisant le bras d'appui (26d) en un premier tronçon de bras d'appui supérieur (26e), qui est relié au point d'articulation (26h) sur la tôle de glissement (13), et en un deuxième tronçon de bras d'appui inférieur (26f), qui est relié au point d'articulation (26g) sur le couvercle de recouvrement flottant (5), la longueur du premier tronçon de bras d'appui supérieur (26e) étant supérieure à la longueur du bras de traction (26c).
EP14002318.5A 2014-07-07 2014-07-07 Récipient cylindrique avec un système d'étanchéification pour l'espace annulaire entre la paroi du récipient et une paroi externe d'un flotteur recouvrant Not-in-force EP2966010B1 (fr)

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EP14002318.5A EP2966010B1 (fr) 2014-07-07 2014-07-07 Récipient cylindrique avec un système d'étanchéification pour l'espace annulaire entre la paroi du récipient et une paroi externe d'un flotteur recouvrant

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EP14002318.5A EP2966010B1 (fr) 2014-07-07 2014-07-07 Récipient cylindrique avec un système d'étanchéification pour l'espace annulaire entre la paroi du récipient et une paroi externe d'un flotteur recouvrant

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EP2966010B1 true EP2966010B1 (fr) 2017-03-15

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CN108058912B (zh) * 2018-01-03 2023-10-03 江苏德大石化科技有限公司 一种浮盘的自动补偿高弹性密封机构
CN110469674B (zh) * 2018-05-09 2023-02-28 沃德林科环保设备（北京）有限公司 一种新型全密闭量油导向柱密封装置
US11591157B2 (en) * 2020-07-16 2023-02-28 Saudi Arabian Oil Company Lightning protection system for external floating roof tank
CN114348483B (zh) * 2021-12-02 2023-06-16 安徽美祥实业有限公司 一种消除油气空间的密封装置及方法

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US3565279A (en) 1968-10-29 1971-02-23 Us Industries Inc Floating roof tank seal means
DE3313564A1 (de) * 1983-04-14 1984-10-18 Ingenieurbüro Imhof GmbH, 6050 Offenbach Vorrichtung zur abdichtung des ringspalts zwischen behaelterwand und schwimmender abdeckung eines grossraumbehaelters
JPS61147785U (fr) * 1985-03-06 1986-09-11
US4811859A (en) * 1987-11-27 1989-03-14 Kinghorn Jr Mark D Seal for floating roof
SA94140657B1 (ar) 1993-06-16 2006-03-15 شيكاجو بريدج آند ايرن تكنيكال سيرفسز كمبني نظام تعليق زنبركي لمانع تسرب على شكل لوح معدني حذائي metallic shoe لسقف عائم
US5667091A (en) * 1994-12-29 1997-09-16 Chicago Bridge & Iron Technical Services Company Mounting system for floating roof seals
DE59607357D1 (de) 1995-12-27 2001-08-30 Heinrich Imhof Dichtungsanordnung für den Ringspalt zwischen einer Behälterwand und einem Schwimmdach eines Flüssigkeitsbehälters
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