EP1464418A1 - Method of constructing a cylindrical metal storage tank, and device for implementing this method - Google Patents

Method of constructing a cylindrical metal storage tank, and device for implementing this method Download PDF

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Publication number
EP1464418A1
EP1464418A1 EP03100885A EP03100885A EP1464418A1 EP 1464418 A1 EP1464418 A1 EP 1464418A1 EP 03100885 A EP03100885 A EP 03100885A EP 03100885 A EP03100885 A EP 03100885A EP 1464418 A1 EP1464418 A1 EP 1464418A1
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EP
European Patent Office
Prior art keywords
lifting
unwinding
produced
roller
tables
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.)
Withdrawn
Application number
EP03100885A
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German (de)
French (fr)
Inventor
Xavier Jacquet
André Gardette
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CONSTRUCTIONS SOUDEES DU COTEAU CSC
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CONSTRUCTIONS SOUDEES DU COTEAU CSC
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Priority to EP03100885A priority Critical patent/EP1464418A1/en
Publication of EP1464418A1 publication Critical patent/EP1464418A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02—Containers for fluids or gases; Supports therefor
    • E04H7/04—Containers for fluids or gases; Supports therefor mainly of metal
    • E04H7/06—Containers for fluids or gases; Supports therefor mainly of metal with vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/122—Making tubes or metal hoses with helically arranged seams with welded or soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like

Definitions

  • the invention relates to the production of cylindrical metal casing of large dimensions. It relates more specifically to the manufacture of tanks of such dimensions, used in the food, agrochemical, chemical, petrochemical as well as in the environmental field (effluent treatment).
  • the object of the present invention is to propose a solution to this problem, so that it becomes possible to make tanks, and generally metal enclosures cylindrical cylinders of very high capacity, for example having a height greater than fifteen meters, and a diameter greater than twenty meters.
  • the invention basically consists of no longer using a merry-go-round rotary, as in the case of the document of the aforementioned prior art, but to use a plurality of unwinding tables and lifting masts, allowing the forces to be distributed, and hence, to handle elements of significantly greater mass.
  • the lifting mats are assembled at the tables of unfolding. These two organs are therefore in equal number.
  • the circumferential rings of lifting are not secured to each of the ferrules, but at periodic intervals, function in particular the possible lifting height conferred on said lifting masts.
  • the mobile structure is movable between an operational position, in which it receives the metal strip and a retracted position under the action of a jack electric or pneumatic or any other equivalent device.
  • the roller with a horizontal axis of rotation receiving the lower edge of the ferrule in progress is made of a material with structural hardening.
  • the unwinding tables each extend by a lifting mast.
  • the assembly consisting of an unwinding table and a lifting mast is in one piece.
  • FIG. 1 is a schematic plan view of the bottom of the tank to be produced in accordance with the invention.
  • FIG. 2 is a schematic representation in cross section of FIG. 1.
  • Figure 3 is a schematic plan view of the installation according to the invention.
  • Figure 4 is a schematic representation of an unwinding table provided with its lifting mast.
  • Figure 5 is a schematic detail view of the actual unwinding table.
  • Figure 6 is a schematic representation of the welding machine according to the invention.
  • Figure 7 is a schematic representation of the machine for unwinding the metal strip, according to the invention.
  • Figure 8 illustrates in schematic perspective the unwinding operation according to the invention.
  • FIG. 1 is a schematic plan view of the bottom of the tank to be produced in accordance with the invention.
  • FIG. 2 is a schematic representation in cross section of FIG. 1.
  • Figure 3 is a schematic plan view of the installation according to the invention.
  • Figure 4 is a schematic representation of an unwinding table provided with its lifting mast.
  • Figure 5 is a schematic detail view
  • FIG. 9 illustrates the operation of placing the dome of the tank on the first ferrule produced, in accordance with the invention.
  • FIG. 10 illustrates the unwinding of the second ferrule, in accordance with the invention.
  • FIG. 11 illustrates the unwinding of the fourth ferrule, in accordance with the invention.
  • FIG. 12 illustrates in summary the different steps for producing a tank made up of ten ferrules.
  • the first step in the process for producing the tank according to the invention consists in realize the bottom (1) thereof.
  • a concrete slab (2) is produced, within which are positioned a number of rods (4) in the shape of a carp tail, intended to be embedded in concrete, the upper end of which is welded to a metal structure serving as an anchor to the metal plates constituting the bottom itself. It is advantageously inclined, in order to allow the emptying operations of the final tank.
  • the bottom (1) is inclined by one of its peripheral edges, in the direction of the diametrically opposite edge.
  • the highest or lowest point of which is located in its center.
  • reservations (3) are provided on the periphery of this circular bottom (1) in concrete, evenly distributed. These reservations (3) are intended to serve as a point anchoring and fixing to as many unwinding tables and lifting masts, as well as that will appear clearly in the description which follows.
  • FIG. 3 shows a general view of the installation for producing the tank, according to the invention.
  • the unwinding tables associated with their lifting mast (8) have been positioned at the aforementioned reservations (3).
  • the device for unwinding (6) the metal strips has also been symbolized, in the vicinity of the lowest unwinding table in said figure.
  • the welding machine (7) the ferrules between them has also been shown. This one is mounted in a fixed position, so that to ensure the welding of two adjacent ferrules between them, it is important that said ferrules are driven in a circular translational movement at said welding machine.
  • the unwinding tables (8) according to the invention will thus be described, in relation to the Figures 4 and 5. As already indicated, these tables are fixed to the periphery of the bottom of the tank on a concrete slab within reservations (3) provided for this purpose.
  • the base (9) receives a structure (11) movable in horizontal translation, between a position operational, in which the table receives a ferrule in progress or already completed, and then protruding towards the center of the tank, and a retracted position in which said movable structure is somehow retracted into a housing provided for this purpose within the table, thus eliminating the aforementioned projection.
  • Said movable structure comprises a first roller (15), acting as a drive roller, and whose axis of revolution (21) is vertical.
  • This roller (15) is motorized, by means of a motor assembly secured to said structure mobile, and comprising an electric motor (16), the motor axis of which cooperates with a return angle (17), actuating a vertical axis (18).
  • the upper end of this vertical axis is provided with a toothed pinion, cooperating with a chain (19), cooperating in turn with a toothed pinion positioned in the vicinity of the upper end of the axis (21) of said roller motor (15).
  • the mobile structure comprises a second roller (22), called a pressure roller, with an axis of revolution (23) parallel to that of the first drive roller (15).
  • This pressure roller (22) is freely mounted in rotation on a base (24), itself movable in horizontal translation under the action of a means of translation integral with the mobile structure, so as to allow to exert pressure by the generator of said roller, against the drive roller.
  • this means of translation consists of an electric or pneumatic cylinder, the cylinder of which (25) is integral with the movable structure, and the end of the piston (26) of which is secured to said base (24).
  • the mobile structure finally comprises a roller (27) with horizontal axis of rotation, positioned between the two motor rollers (15) and presser (22), and substantially flush with the lower edge of the generators of said rollers.
  • This roller (27), mounted for rotation, is intended to receive the lower edge of the ferrule (5) in progress.
  • This planar element (27) is typically made of a material with structural hardening, in order to avoid the punching likely to be generated by the metal strip in contact with it.
  • the jack (13, 14) ensuring the displacement in horizontal translation of the mobile structure (11) is mounted and chosen so that at maximum extension, the generator of the roller motor (15) corresponds substantially to the desired diameter (28) of the shell to be produced, and therefore as a corollary of the final tank.
  • this unwinding table (8) is extended at its upper part by a mat lifting, secured to the base (9) of said table.
  • this mat rises one height close to 4.25 meters. It is fitted with a gripping hook or shoe (52), capable of being moved in height by means of an electric or pneumatic jack, or even by a other device performing the same function (not shown).
  • FIG. 6 Schematically illustrated in Figure 6 the welding machine (7) implemented within installation of the invention.
  • This is mounted fixed for the duration of the operations of mounting the tank. It basically includes a base (30), the level of which is adjusted by means of jacks (37, 38), bearing respectively on the bottom (1) and on the raft (2). From this base (30) extend two vertical columns (31, 32), on which are mounted the actual welding heads (33, 34) of an appropriate type depending on the nature of the metal welding. These welding heads are adjustable in height and in relation to each other the other by means of suitable translating members (35, 36, 39).
  • the unwinding machine (6) of the invention also includes a base or frame (46), leveled according to the level of the tables unwinding by means of a plurality of jacks (45). It also includes a tray freely rotating (41), intended to receive a coil (40) of strip metal (or “Coil”). In this case, this metal is made of stainless steel. It could also be made of aluminum.
  • the metal strip (5) from the coil (40) is then taken up by a pair of motor-presser rollers (42, 43), in addition to another roller (not shown) motorized by an electric motor (44), in order to ensure the unwinding of said strip from of the coil at a chosen and determined speed.
  • FIG. 8 thus illustrates the beginning of the unwinding of the metal strip (5) within installation.
  • this tank is provided with a dome (50). We proceed to the assembly of it, sector by sector relative to a central chimney (51), ensuring the lifting and handling of said sectors by means of a crane (not shown).
  • the dome When the dome is made, it is suspended by the lifting masts (8), whose hooks or lifting shoes (52) are hooked by means of a link or equivalent (54) to points of lifting (53) provided for this purpose.
  • the dome is thus raised from a height slightly greater than the width of the metal strip (5).
  • This can then be carried out from the unwind (6) at the unwinding tables, where it is taken up, the pressure roller (22) each of said tables tightening the strip against the drive roller (22).
  • the speed of rotation of the motor rollers is synchronized with the speed of unwinding of the strip (5) by the unrolling machine (6) (figure 9 - left part).
  • the lifting points are then put back in place at the dome, and the assembly then monobloc dome + ferrule is mounted at a sufficient height to allow the unwinding a second metal strip, to form the second ferrule (61) ( Figure 10 - part left), like the first ferrule (60).
  • the dome + first ferrule assembly (60) is lowered, so to land the lower edge of said assembly on the upper edge of said second ferrule (62). We remove the lifting points of said first set, and we proceed, as for the first assembly to weld it with the second ferrule by rotation at the welding machine.
  • the periphery of the second ferrule substantially at mid-height thereof a circumferential ring or belt (55).
  • This ring firstly has the function of reinforcing the ferrule in question. he is also intended to provide stability against buckling of the final tank. It also guarantees the roundness of the latter during its various construction phases. Finally, it is also intended to serve as a gripping member during successive lifting phases. It thus allows to distribute the load forces, and moreover to avoid the phenomena of punching during the lifting.
  • This ring typically consists of a metal angle, open in the direction of the bottom.
  • the means for lifting the masts are then repositioned on this ring (55), and the lifting of the dome + ferrule (60) + ferrule (61) assembly, and the operations are thus repeated operations of unwinding the metal strip and welding, with the installation of a circumferential ring or belt every two ferrules (see figure 11).
  • bodies ensuring the dual function of lifting and rotation ferrules reduces the power of the tools usually used for the realization such speakers. At the same time, they make it possible to get rid of cranes and other scaffolding, usually used for the construction of such enclosures. They also make it possible to avoid the work of staff at height, a source of time loss off accidents.
  • the invention makes it possible to optimize the quality of finish of the welds, and the maintenance of the appearance of the surfaces of the metal strips used, thereby promoting compliance of the final tank with the sanitary and food requirements, when these are required.

Abstract

The method involves receiving a metallic band (5) from a spool (40) on a number of motorized rolling tables (8). The tables are regularly divided at a periphery of a metallic envelope to be designed and intended to ensure a progression of the band according to a cylindrical profile. A circumferential ring is integrated with a periphery of designed ferrules. Lifting masts are hooked at a level of the circumferential ring. An independent claim is also included for installation for creating a cylindrical metallic enclosure.

Description

L'invention concerne la réalisation d'enveloppe métallique cylindrique de grandes dimensions. Elle concerne plus spécifiquement la fabrication de cuves de telles dimensions, utilisées dans les domaines alimentaires, agrochimiques, chimiques, pétrochimiques ainsi que dans le domaine de l'environnement (traitements d'effluents).The invention relates to the production of cylindrical metal casing of large dimensions. It relates more specifically to the manufacture of tanks of such dimensions, used in the food, agrochemical, chemical, petrochemical as well as in the environmental field (effluent treatment).

Les dimensions en question sont typiquement supérieures à dix mètres de haut et quinze mètres de diamètre, donc très supérieures au gabarit routier. Ce faisant, la réalisation de telles cuves doit être effectuée sur site.The dimensions in question are typically greater than ten meters high and fifteen meters in diameter, therefore much greater than the road gauge. In doing so, the realization of such tanks must be carried out on site.

On a décrit, dans le document FR-A-2 551 370 un procédé de réalisation sur site de cuves de grandes dimensions par soudage de viroles successives. Ce procédé consiste essentiellement :

  • à dérouler en continu et à vitesse régulière une bande métallique à partir d'une bobine ;
  • à déposer simultanément et en continu ladite bande ainsi déroulée sur un manège comportant un plateau tournant, dont la vitesse de rotation correspond à la vitesse d'avancement de la bande, et dont le rayon correspond au rayon de la virole à réaliser ;
  • à stopper le déroulement de la bande et à procéder à sa découpe une fois atteinte la longueur correspondant au développement de la virole ;
  • à amener l'ouvrage en cours au dessus de cette virole, et à effectuer l'accostage et la soudure horizontale du bord supérieur de cette virole avec le bord inférieur dudit ouvrage, le manège étant en rotation à vitesse contrôlée ;
  • à réaliser la soudure verticale de fermeture de ladite virole par arrêt du manège.
Document FR-A-2 551 370 describes a process for producing large size tanks on site by welding successive ferrules. This process essentially consists of:
  • unrolling a metal strip continuously and at regular speed from a reel;
  • depositing simultaneously and continuously said strip thus unwound on a merry-go-round comprising a turntable, the speed of rotation of which corresponds to the speed of advance of the strip, and the radius of which corresponds to the radius of the shell to be produced;
  • in stopping the unwinding of the strip and in cutting it once the length corresponding to the development of the shell has been reached;
  • bringing the work in progress above this shell, and carrying out docking and horizontal welding of the upper edge of this shell with the lower edge of said structure, the carousel being in rotation at controlled speed;
  • to carry out the vertical welding for closing said ferrule by stopping the carousel.

Si ce procédé a permis de grandement simplifier la réalisation de cuves de relativement grandes dimensions sur site, typiquement trois à dix mètres de hauteur et de diamètre, en revanche, il présente rapidement des limites, dès lors que l'on souhaite construire des cuves de plus grandes dimensions. Cette limite est principalement inhérente à la masse que représente l'ouvrage en cours de réalisation, qui peut nécessiter la mise en oeuvre d'engins de levage à très grande capacité, souvent incompatible avec la place disponible sur le site en question.If this process has made it possible to greatly simplify the production of relatively large dimensions on site, typically three to ten meters in height and diameter, in on the other hand, it quickly presents limits, as soon as one wishes to build tanks larger dimensions. This limitation is mainly inherent in the mass that represents the work in progress, which may require the implementation of very high capacity lifting, often incompatible with the space available on site in question.

L'objet de la présente invention est de proposer une solution à ce problème, de sorte qu'il devient possible de réaliser des cuves, et de manière générale des enceintes métalliques cylindriques de très grande capacité, présentant par exemple une hauteur supérieure à quinze mètres, et un diamètre supérieur à vingt mètres. The object of the present invention is to propose a solution to this problem, so that it becomes possible to make tanks, and generally metal enclosures cylindrical cylinders of very high capacity, for example having a height greater than fifteen meters, and a diameter greater than twenty meters.

Ce procédé pour la réalisation d'une enveloppe métallique cylindrique de grandes dimensions par soudage de viroles successives, dans lequel :

  • on déroule en continu une bande métallique à partir d'une bobine, que l'on découpe lorsque la longueur souhaitée, correspondant au développement souhaité de la virole est atteinte ;
  • on amène la partie de l'ouvrage déjà réalisée au dessus de cette virole, et on effectue l'accostage et la soudure horizontale en continu du bord supérieur de cette virole avec le bord inférieur dudit ouvrage, au moyen d'une machine à souder, puis on effectue la soudure verticale de fermeture de ladite virole à l'arrêt ;
consiste :
  • à recevoir chaque bande métallique en cours de déroulage sur une pluralité de tables de déroulement motorisées, sensiblement régulièrement réparties à la périphérie de l'enveloppe métallique à réaliser, et destinées à assurer selon un plan déterminé la progression de ladite bande selon un profil cylindrique ;
  • à solidariser un anneau circonférentiel, également dénommé ceinture, à la périphérie d'une partie au moins des viroles ainsi réalisées ;
  • à réaliser le levage de la partie de l'ouvrage ainsi réalisée au moyen de mats de levage, également sensiblement régulièrement répartis à la périphérie de l'enveloppe métallique à réaliser, lesdits mats étant simultanément accrochés au niveau d'un même anneau circonférentiel ;
  • à recommencer ces opérations jusqu'à atteindre la hauteur souhaitée de l'enveloppe à réaliser ;
  • et, lorsque cette hauteur est atteinte, à soulever l'ensemble au moyen desdits mats de levage, afin de permettre l'évacuation desdites tables de roulement et de la machine à souder, et le dépôt dudit ensemble sur le fond de l'enveloppe, préalablement constitué et mis en place.
This process for producing a large cylindrical metal casing by welding successive ferrules, in which:
  • a metal strip is continuously unwound from a reel, which is cut when the desired length, corresponding to the desired development of the shell, is reached;
  • the part of the structure already produced is brought above this ferrule, and docking and horizontal welding are carried out continuously on the upper edge of this ferrule with the lower edge of said structure, by means of a welding machine, then the vertical weld closing of said ferrule is stopped;
consists of:
  • receiving each metal strip during unwinding on a plurality of motorized unwinding tables, substantially regularly distributed around the periphery of the metal casing to be produced, and intended to ensure, according to a determined plane, the progression of said strip according to a cylindrical profile;
  • securing a circumferential ring, also known as a belt, at the periphery of at least part of the ferrules thus produced;
  • carrying out the lifting of the part of the structure thus produced by means of lifting mats, also substantially evenly distributed around the periphery of the metal casing to be produced, said mats being simultaneously hooked at the same circumferential ring;
  • to repeat these operations until reaching the desired height of the envelope to be produced;
  • and, when this height is reached, lifting the assembly by means of said lifting mats, in order to allow the evacuation of said rolling tables and of the welding machine, and the deposition of said assembly on the bottom of the envelope, previously constituted and implemented.

En d'autres termes, l'invention consiste fondamentalement à ne plus faire appel à un manège rotatif, comme dans le cas du document de l'art antérieur précité, mais à faire appel à une pluralité de tables de déroulement et de mats de levage, permettant de répartir les efforts, et partant, de manutentionner des éléments de masse nettement plus importante.In other words, the invention basically consists of no longer using a merry-go-round rotary, as in the case of the document of the aforementioned prior art, but to use a plurality of unwinding tables and lifting masts, allowing the forces to be distributed, and hence, to handle elements of significantly greater mass.

Avantageusement, et selon l'invention, les mats de levage sont assemblés au niveau des tables de déroulement. Ces deux organes sont donc en nombre égal.Advantageously, and according to the invention, the lifting mats are assembled at the tables of unfolding. These two organs are therefore in equal number.

Selon une autre caractéristique avantageuse de l'invention, les anneaux circonférentiels de levage ne sont pas solidarisés sur chacune des viroles, mais à intervalles périodiques, fonction notamment de la hauteur possible de levage conférée auxdits mats de levage. According to another advantageous characteristic of the invention, the circumferential rings of lifting are not secured to each of the ferrules, but at periodic intervals, function in particular the possible lifting height conferred on said lifting masts.

L'invention concerne également une installation pour la mise en oeuvre de ce procédé. Cette installation comprend :

  • un dispositif dérouleur de la bande métallique, stockée sous forme de bobine ;
  • un poste de soudage fixe, susceptible de réaliser tant une soudure horizontale qu'une soudure verticale ;
  • une pluralité de tables de déroulement, sensiblement régulièrement réparties à la périphérie de l'enveloppe métallique à réaliser, et destinées à assurer selon un plan déterminé la progression de la bande métallique issue du dispositif dérouleur selon un profil cylindrique ;
  • une pluralité de mats de levage, sensiblement régulièrement réparties à la périphérie de l'enveloppe métallique à réaliser, et destinés à assurer le levage de la première virole réalisée ou de la partie d'ouvrage déjà réalisée, ainsi que leur redescente au contact de la virole en cours de réalisation ou du fond de ladite enceinte.
The invention also relates to an installation for implementing this method. This installation includes:
  • a device for unwinding the metal strip, stored in the form of a reel;
  • a fixed welding station, capable of carrying out both horizontal and vertical welding;
  • a plurality of unwinding tables, substantially regularly distributed around the periphery of the metal casing to be produced, and intended to ensure, along a determined plane, the progression of the metal strip coming from the unwinding device according to a cylindrical profile;
  • a plurality of lifting masts, substantially regularly distributed around the periphery of the metal casing to be produced, and intended to ensure the lifting of the first ferrule produced or of the part of the structure already produced, as well as their descent in contact with the shell in progress or from the bottom of said enclosure.

Selon l'invention, les tables de déroulement comprennent :

  • un socle, venant se fixer au sol, à la périphérie de la zone destinée à recevoir l'enveloppe cylindrique à réaliser ;
  • une structure mobile en translation horizontale sur le socle, et munie :
  • Figure 00030001
    d'un premier galet, dit galet moteur, motorisé et à axe de révolution vertical,
  • Figure 00030002
    d'un second galet, dit galet presseur, d'axe de révolution parallèle à celui du premier
  • galet moteur, et monté libre en rotation sur une base elle-même mobile en translation
  • horizontale sous l'action d'un moyen de translation solidaire de la structure mobile, de
  • telle sorte à permettre d'exercer une pression par la génératrice dudit galet, contre le
  • galet moteur, et ainsi à assurer la progression de la bande métallique ;
  • Figure 00030003
    d'un rouleau à axe de rotation horizontal, positionné entre les deux galets moteur et
  • presseur et affleurant sensiblement au niveau du bord inférieur des génératrices desdits
  • galets, et destiné à recevoir le bord inférieur de la virole en cours de réalisation.
According to the invention, the unwinding tables include:
  • a base, which is fixed to the ground, at the periphery of the zone intended to receive the cylindrical envelope to be produced;
  • a mobile structure in horizontal translation on the base, and provided with:
  • Figure 00030001
    a first roller, said motorized, motorized roller with a vertical axis of revolution,
  • Figure 00030002
    a second roller, called a pressure roller, with an axis of revolution parallel to that of the first
  • drive roller, and mounted free in rotation on a base which is itself mobile in translation
  • horizontal under the action of a means of translation integral with the mobile structure,
  • so as to allow pressure to be exerted by the generator of said roller, against the
  • drive roller, and thus to ensure the progression of the metal strip;
  • Figure 00030003
    a roller with horizontal axis of rotation, positioned between the two motor rollers and
  • presser and substantially flush with the lower edge of the generators of said
  • rollers, and intended to receive the lower edge of the shell in progress.

Selon l'invention, la structure mobile est mobile entre une position opérationnelle, dans laquelle elle reçoit la bande métallique et une position escamotée sous l'action d'un vérin électrique ou pneumatique ou tout autre organe équivalent.According to the invention, the mobile structure is movable between an operational position, in which it receives the metal strip and a retracted position under the action of a jack electric or pneumatic or any other equivalent device.

Avantageusement, le rouleau à axe de rotation horizontal recevant le bord inférieur de la virole en cours de réalisation est constitué d'un matériau à durcissement structurel.Advantageously, the roller with a horizontal axis of rotation receiving the lower edge of the ferrule in progress is made of a material with structural hardening.

Selon l'invention, les tables de déroulement se prolongent chacune par un mat de levage. Ainsi, l'ensemble constitué par une table de déroulement et un mât de levage est monobloc. According to the invention, the unwinding tables each extend by a lifting mast. Thus, the assembly consisting of an unwinding table and a lifting mast is in one piece.

La manière dont l'invention peut être réalisée et les avantages qui en découlent, ressortiront mieux de l'exemple de réalisation qui suit, donné à titre indicatif et non limitatif à l'appui des figures annexées.
La figure 1 est une représentation schématique en plan du fond de la cuve à réaliser conformément à l'invention.
La figure 2 est une représentation schématique en section transversale de la figure 1.
La figure 3 est une représentation schématique en plan de l'installation conforme à l'invention.
La figure 4 est une représentation schématique d'une table de déroulement munie de son mat de levage.
La figure 5 est une vue schématique en détail de la table de déroulement proprement dite.
La figure 6 est une représentation schématique de la machine à soudure conforme à l'invention.
La figure 7 est une représentation schématique de la machine à dérouler la bande métallique, conforme à l'invention.
La figure 8 illustre en perspective schématique l'opération de déroulage conformément à l'invention.
La figure 9 illustre l'opération de mise en place du dôme de la cuve sur la première virole réalisée, conformément à l'invention.
La figure 10 illustre le déroulage de la deuxième virole, conformément à l'invention.
La figure 11 illustre le déroulage de la quatrième virole, conformément à l'invention.
La figure 12 illustre en résumé les différentes étapes pour la réalisation d'une cuve constituée de dix viroles.The manner in which the invention can be implemented and the advantages which ensue therefrom will emerge more clearly from the embodiment which follows, given by way of nonlimiting indication in support of the appended figures.
Figure 1 is a schematic plan view of the bottom of the tank to be produced in accordance with the invention.
FIG. 2 is a schematic representation in cross section of FIG. 1.
Figure 3 is a schematic plan view of the installation according to the invention.
Figure 4 is a schematic representation of an unwinding table provided with its lifting mast.
Figure 5 is a schematic detail view of the actual unwinding table.
Figure 6 is a schematic representation of the welding machine according to the invention.
Figure 7 is a schematic representation of the machine for unwinding the metal strip, according to the invention.
Figure 8 illustrates in schematic perspective the unwinding operation according to the invention.
FIG. 9 illustrates the operation of placing the dome of the tank on the first ferrule produced, in accordance with the invention.
FIG. 10 illustrates the unwinding of the second ferrule, in accordance with the invention.
FIG. 11 illustrates the unwinding of the fourth ferrule, in accordance with the invention.
FIG. 12 illustrates in summary the different steps for producing a tank made up of ten ferrules.

La description qui suit concerne la réalisation d'une cuve de grande capacité conformément à l'invention. Cependant, l'invention ne se limite pas à cette seule application, et toute enveloppe ou enceinte cylindrique est également visée par celle-ci.The following description relates to the production of a large capacity tank in accordance with the invention. However, the invention is not limited to this single application, and any envelope or cylindrical enclosure is also targeted by it.

La première étape de procédé de réalisation de la cuve conforme à l'invention consiste à réaliser le fond (1) de celle-ci. A cet effet, on réalise un radier (2) en béton, au sein duquel sont positionnés un certain nombre de tiges (4) en forme de queue de carpe, destinées à être noyées dans le béton, et dont l'extrémité supérieure est soudée à une structure métallique servant d'ancrage aux plaques métalliques constitutives du fond proprement dit. Celui-ci est avantageusement incliné, afin de permettre les opérations de vidange de la cuve définitive.The first step in the process for producing the tank according to the invention consists in realize the bottom (1) thereof. To this end, a concrete slab (2) is produced, within which are positioned a number of rods (4) in the shape of a carp tail, intended to be embedded in concrete, the upper end of which is welded to a metal structure serving as an anchor to the metal plates constituting the bottom itself. It is advantageously inclined, in order to allow the emptying operations of the final tank.

Dans la figure 2, le fond (1) est incliné de l'un de ses bords périphériques, en direction du bord diamétralement opposé. Cependant, on peut également envisager la réalisation d'un fond, dont le point le plus élevé ou le plus bas est situé en son centre. In FIG. 2, the bottom (1) is inclined by one of its peripheral edges, in the direction of the diametrically opposite edge. However, one can also envisage the realization of a bottom, the highest or lowest point of which is located in its center.

A la périphérie de ce fond circulaire (1), sont ménagées un certain nombre de réservations (3) dans le béton, régulièrement réparties. Ces réservations (3) sont destinées à servir de point d'ancrage et de fixation à autant de tables de déroulement et de mats de levage, ainsi que cela apparaítra clairement dans la description qui suit.A number of reservations (3) are provided on the periphery of this circular bottom (1) in concrete, evenly distributed. These reservations (3) are intended to serve as a point anchoring and fixing to as many unwinding tables and lifting masts, as well as that will appear clearly in the description which follows.

Il peut être observé au sein de la figure 1, que la réservation située le plus en bas de celle-ci n'est pas positionnée avec le même écart angulaire par rapport aux deux réservations qui lui sont immédiatement adjacentes. Cette configuration est dictée par des commodités d'installation du dispositif de déroulement des bandes métalliques, constitutives des viroles entrant dans la constitution de la cuve.It can be seen in Figure 1, that the reservation located at the bottom of it is not positioned with the same angular deviation from the two reservations which are immediately adjacent. This configuration is dictated by amenities of installation of the device for unwinding the metal strips constituting the ferrules entering into the constitution of the tank.

On a représenté au sein de la figure 3 une vue générale de l'installation de réalisation de la cuve, conformément à l'invention. Au sein de celle-ci, les tables de déroulement associées à leur mat de levage (8) ont été positionnées au niveau des réservations (3) précitées. Corollairement, le dispositif de déroulement (6) des bandes métalliques a également été symbolisé, au voisinage de la table de déroulement la plus basse sur ladite figure. De la même manière, la machine à souder (7) les viroles entre elles a également été représentée. Celle-ci est montée en poste fixe, de sorte que pour assurer la soudure de deux viroles adjacentes entre elles, il importe que lesdites viroles soient animées d'un mouvement de translation circulaire au niveau de ladite machine à souder. Ces opérations de translation vont être décrites en relation avec la description des différents organes permettant d'assurer cette translation.FIG. 3 shows a general view of the installation for producing the tank, according to the invention. Within it, the unwinding tables associated with their lifting mast (8) have been positioned at the aforementioned reservations (3). As a corollary, the device for unwinding (6) the metal strips has also been symbolized, in the vicinity of the lowest unwinding table in said figure. Of the same manner, the welding machine (7) the ferrules between them has also been shown. This one is mounted in a fixed position, so that to ensure the welding of two adjacent ferrules between them, it is important that said ferrules are driven in a circular translational movement at said welding machine. These translation operations will be described in relation with the description of the various organs making it possible to ensure this translation.

Il va être ainsi décrit les tables de déroulement (8) conforme à l'invention, en relation avec les figures 4 et 5. Comme déjà indiqué, ces tables sont fixées à la périphérie du fond de la cuve sur un radier en béton au sein de réservations (3) prévues à cet effet.The unwinding tables (8) according to the invention will thus be described, in relation to the Figures 4 and 5. As already indicated, these tables are fixed to the periphery of the bottom of the tank on a concrete slab within reservations (3) provided for this purpose.

Compte tenu des dimensions importantes des viroles, notamment en diamètre, il importe que toutes les tables de déroulement présentent une surface d'appui de la bande métallique (5) positionnée selon un même niveau. Pour ce faire, elles disposent chacune d'un socle (9) fixable au sein des réservations (3) au moyen d'un pied (10) muni d'organes de réglage en hauteur. Ce réglage de niveau est avantageusement réalisé par télémétrie laser, bien connue pour cette application, de sorte qu'il n'y a pas lieu de la décrire ici plus en détail.Given the large dimensions of the ferrules, in particular in diameter, it is important that all unwinding tables have a support surface for the metal strip (5) positioned on the same level. To do this, they each have a base (9) fixable within reservations (3) by means of a foot (10) provided with adjustment members height. This level adjustment is advantageously carried out by laser telemetry, well known for this application, so there is no need to describe it here in more detail.

Le socle (9) reçoit une structure (11) mobile en translation horizontale, entre une position opérationnelle, dans laquelle la table reçoit une virole en cours de réalisation ou déjà réalisée, et faisant alors saillie en direction du centre de la cuve, et une position escamotée dans laquelle ladite structure mobile est en quelque sorte rentrée dans un logement prévu à cet effet au sein de la table, éliminant alors la saillie précitée. The base (9) receives a structure (11) movable in horizontal translation, between a position operational, in which the table receives a ferrule in progress or already completed, and then protruding towards the center of the tank, and a retracted position in which said movable structure is somehow retracted into a housing provided for this purpose within the table, thus eliminating the aforementioned projection.

La transition entre ces deux positions est réalisée au moyen d'un vérin électrique ou pneumatique, dont le cylindre (13) est solidarisé au socle, et dont l'extrémité libre du piston (14) est solidarisée à une paroi de ladite structure mobile ou vice versa.The transition between these two positions is carried out by means of an electric actuator or pneumatic, whose cylinder (13) is secured to the base, and whose free end of the piston (14) is secured to a wall of said movable structure or vice versa.

Ladite structure mobile comporte un premier galet (15), faisant fonction de galet moteur, et dont l'axe de révolution (21) est vertical.Said movable structure comprises a first roller (15), acting as a drive roller, and whose axis of revolution (21) is vertical.

Ce galet (15) est motorisé, au moyen d'un ensemble moteur solidarisé à la dite structure mobile, et comprenant un moteur électrique (16), dont l'axe moteur coopère avec un renvoi d'angle (17), actionnant un axe vertical (18). L'extrémité supérieure de cet axe vertical est munie d'un pignon denté, coopérant avec une chaíne (19), coopérant à son tour avec un pignon denté positionné au voisinage de l'extrémité supérieure de l'axe (21) dudit galet moteur (15).This roller (15) is motorized, by means of a motor assembly secured to said structure mobile, and comprising an electric motor (16), the motor axis of which cooperates with a return angle (17), actuating a vertical axis (18). The upper end of this vertical axis is provided with a toothed pinion, cooperating with a chain (19), cooperating in turn with a toothed pinion positioned in the vicinity of the upper end of the axis (21) of said roller motor (15).

Corollairement, la structure mobile comporte un second galet (22), dit galet presseur, d'axe de révolution (23) parallèle à celui du premier galet moteur (15). Ce galet presseur (22) est monté libre en rotation sur une base (24), elle-même mobile en translation horizontale sous l'action d'un moyen de translation solidaire de la structure mobile, de telle sorte à permettre d'exercer une pression par la génératrice dudit galet, contre le galet moteur. Typiquement, ce moyen de translation est constitué par un vérin électrique ou pneumatique, dont le cylindre (25) est solidaire de la structure mobile, et dont l'extrémité du piston (26) est solidarisée à ladite base (24).As a corollary, the mobile structure comprises a second roller (22), called a pressure roller, with an axis of revolution (23) parallel to that of the first drive roller (15). This pressure roller (22) is freely mounted in rotation on a base (24), itself movable in horizontal translation under the action of a means of translation integral with the mobile structure, so as to allow to exert pressure by the generator of said roller, against the drive roller. Typically, this means of translation consists of an electric or pneumatic cylinder, the cylinder of which (25) is integral with the movable structure, and the end of the piston (26) of which is secured to said base (24).

Ce faisant, comme les deux galets, respectivement moteur (15) et presseur (22) sont parallèles et présentent la même hauteur et sont situés au même niveau, l'actionnement du vérin (25, 26) entraíne le déplacement de la base (24) sur la droite (sur la figure 5) et corollairement la pression du galet (22) contre le galet (15) par génératrices interposées, permettant de la sorte d'assurer la progression de la bande métallique.In doing so, as the two rollers, respectively motor (15) and presser (22) are parallel and have the same height and are located at the same level, the actuation of the jack (25, 26) causes the base (24) to move to the right (in Figure 5) and as a corollary pressure of the roller (22) against the roller (15) by interposed generators, thereby enabling to ensure the progression of the metal strip.

La structure mobile comporte enfin un rouleau (27) à axe de rotation horizontal, positionné entre les deux galets moteur (15) et presseur (22), et affleurant sensiblement au niveau du bord inférieur des génératrices desdits galets. Ce rouleau (27), monté fou en rotation, est destiné à recevoir le bord inférieur de la virole (5) en cours de réalisation.The mobile structure finally comprises a roller (27) with horizontal axis of rotation, positioned between the two motor rollers (15) and presser (22), and substantially flush with the lower edge of the generators of said rollers. This roller (27), mounted for rotation, is intended to receive the lower edge of the ferrule (5) in progress.

Cet élément plan (27) est typiquement constitué d'un matériau à durcissement structurel, afin d'éviter le poinçonnage susceptible d'être engendré par la bande métallique à son contact. This planar element (27) is typically made of a material with structural hardening, in order to avoid the punching likely to be generated by the metal strip in contact with it.

Le vérin (13, 14) assurant le déplacement en translation horizontale de la structure mobile (11) est monté et choisi de telle sorte qu'en extension maximum, la génératrice du galet moteur (15) corresponde sensiblement au diamètre souhaité (28) de la virole à réaliser, et donc corollairement de la cuve définitive.The jack (13, 14) ensuring the displacement in horizontal translation of the mobile structure (11) is mounted and chosen so that at maximum extension, the generator of the roller motor (15) corresponds substantially to the desired diameter (28) of the shell to be produced, and therefore as a corollary of the final tank.

Selon l'invention, cette table de déroulement (8) se prolonge à sa partie supérieure par un mat de levage, solidarisé au socle (9) de ladite table. Dans l'exemple décrit, ce mat s'élève d'une hauteur voisine de 4,25 mètres. Il est muni d'un crochet ou sabot de préhension (52), susceptible d'être mû en hauteur au moyen d'un vérin électrique ou pneumatique, voire par un autre dispositif assurant la même fonction (non représenté).According to the invention, this unwinding table (8) is extended at its upper part by a mat lifting, secured to the base (9) of said table. In the example described, this mat rises one height close to 4.25 meters. It is fitted with a gripping hook or shoe (52), capable of being moved in height by means of an electric or pneumatic jack, or even by a other device performing the same function (not shown).

Dans la pratique, le nombre de mats de levage, donc de tables de déroulements est suffisamment important, pour qu'en cas de défaillance de l'un d'eux, la charge correspondante puisse être répartie sans dommage sur les deux mats qui lui sont immédiatement adjacents.In practice, the number of lifting masts, therefore of unwinding tables is sufficiently large that, in the event of one of them failing, the charge corresponding can be distributed without damage on the two mats which are to him immediately adjacent.

On a schématiquement illustré en figure 6 la machine à souder (7) mise en oeuvre au sein de l'installation de l'invention. Celle-ci est montée fixe pendant toute la durée des opérations de montage de la cuve. Elle comprend fondamentalement un socle (30), dont on ajuste le niveau au moyen de vérins (37, 38), prenant respectivement appui sur le fond (1) et sur le radier (2). De ce socle (30) s'étendent deux colonnes verticales (31, 32), sur lesquelles sont montées les têtes de soudage proprement dites (33, 34) de type approprié en fonction de la nature du métal à souder. Ces têtes de soudage sont ajustables en hauteur et en relation l'une par rapport à l'autre au moyen d'organes de translation appropriés (35, 36, 39).Schematically illustrated in Figure 6 the welding machine (7) implemented within installation of the invention. This is mounted fixed for the duration of the operations of mounting the tank. It basically includes a base (30), the level of which is adjusted by means of jacks (37, 38), bearing respectively on the bottom (1) and on the raft (2). From this base (30) extend two vertical columns (31, 32), on which are mounted the actual welding heads (33, 34) of an appropriate type depending on the nature of the metal welding. These welding heads are adjustable in height and in relation to each other the other by means of suitable translating members (35, 36, 39).

On a représenté en relation avec la figure 7 la machine de déroulage (6) de l'invention. Celle-ci comporte également un socle ou bâti (46), mis à niveau en fonction du niveau des tables de déroulement au moyen d'une pluralité de vérins (45). Elle comporte en outre un plateau tournant librement en rotation (41), destiné à recevoir une bobine (40) de métal en bande (ou « coil »). En l'espèce, ce métal est constitué d'acier inoxydable. Il pourrait également être constitué d'aluminium. La bande métallique (5) issue de la bobine (40) est ensuite reprise par une paire de rouleaux (42, 43) moteur-presseur, outre un autre rouleau (non représenté) motorisés par un moteur électrique (44), afin d'assurer le déroulement de ladite bande à partir de la bobine selon une vitesse choisie et déterminée.Is shown in relation to Figure 7 the unwinding machine (6) of the invention. This one also includes a base or frame (46), leveled according to the level of the tables unwinding by means of a plurality of jacks (45). It also includes a tray freely rotating (41), intended to receive a coil (40) of strip metal (or "Coil"). In this case, this metal is made of stainless steel. It could also be made of aluminum. The metal strip (5) from the coil (40) is then taken up by a pair of motor-presser rollers (42, 43), in addition to another roller (not shown) motorized by an electric motor (44), in order to ensure the unwinding of said strip from of the coil at a chosen and determined speed.

La figure 8 illustre ainsi le début du déroulement de la bande métallique (5) au sein de l'installation. FIG. 8 thus illustrates the beginning of the unwinding of the metal strip (5) within installation.

Il va être maintenant décrit plus en détail, en relation avec les figures 9 à 12, les différents étapes de réalisation de la cuve conformément à l'invention. Dans l'exemple décrit, cette cuve est munie d'un dôme (50). On procède de fait à l'assemblage de celui-ci, secteur par secteur par rapport à une cheminée centrale (51), en assurant le levage et la manutention desdits secteurs au moyen d'une grue (non représentée).There will now be described in more detail, in relation to FIGS. 9 to 12, the different steps for producing the tank in accordance with the invention. In the example described, this tank is provided with a dome (50). We proceed to the assembly of it, sector by sector relative to a central chimney (51), ensuring the lifting and handling of said sectors by means of a crane (not shown).

Lorsque le dôme est réalisé, il est suspendu par les mats de levage (8), dont les crochets ou sabots de levage (52) sont accrochés au moyen d'un lien ou équivalent (54) à des points de levage (53) prévus à cet effet. Le dôme est ainsi élevé d'une hauteur légèrement supérieure à la largeur de la bande métallique (5). Celle-ci peut alors être déroulée de la machine à dérouler (6) au niveau des tables de déroulement, où elle est reprise, le galet presseur (22) de chacune desdites tables venant serrer la bande contre le galet moteur (22). Bien évidemment, la vitesse de rotation des galets moteur est synchronisée avec la vitesse de déroulement de la bande (5) par la machine à dérouler (6) (figure 9 - partie gauche).When the dome is made, it is suspended by the lifting masts (8), whose hooks or lifting shoes (52) are hooked by means of a link or equivalent (54) to points of lifting (53) provided for this purpose. The dome is thus raised from a height slightly greater than the width of the metal strip (5). This can then be carried out from the unwind (6) at the unwinding tables, where it is taken up, the pressure roller (22) each of said tables tightening the strip against the drive roller (22). Of course, the speed of rotation of the motor rollers is synchronized with the speed of unwinding of the strip (5) by the unrolling machine (6) (figure 9 - left part).

Lorsque le développé de la bande (5) est suffisant pour la réalisation d'une virole continue et complète, la progression de celle-ci est stoppée, puis elle est découpée au moyen d'une torche à plasma ou tronçonnée. Puis le dôme est abaissé au moyen desdits mats de levage, jusqu'à permettre son accostage avec le bord supérieur de la virole ainsi constituée. Les différents points de levage du dôme sont alors ôtés, de sorte que celui-ci ne repose plus que sur le bord supérieur de ladite virole. On procède alors à la soudure en continu dudit bord supérieur de la virole sur le dôme, au moyen de la machine à souder (7), la rotation de l'ensemble virole + dôme étant alors effectuée par la coopération des galets moteur et presseur, pour permettre le passage en continu de la zone à souder à l'aplomb des têtes de soudure de la machine à souder fixe (figure 9 - partie droite). Ensuite, un décapage de la soudure est réalisé manuellement, toujours en assurant la rotation virole + dôme, alors constituant un seul ensemble. Enfin, on assure le laminage du cordon de soudure et son polissage, l'ensemble poursuivant sa rotation.When the developed band (5) is sufficient for the realization of a continuous shell and complete, its progression is stopped, then it is cut using a torch plasma or sectioned. Then the dome is lowered by means of said lifting masts, until allow it to dock with the upper edge of the shell thus formed. The different dome lifting points are then removed, so that it only rests on the edge upper of said ferrule. We then proceed to the continuous welding of said upper edge of the ferrule on the dome, by means of the welding machine (7), the rotation of the ferrule assembly + dome then being carried out by the cooperation of the motor and pressure rollers, to allow the continuous passage of the welding area directly above the welding heads of the welding machine fixed (figure 9 - right part). Then, a pickling of the weld is carried out manually, always ensuring the ferrule + dome rotation, then constituting a single assembly. Finally, we ensures the rolling of the weld bead and its polishing, the assembly continuing its rotation.

Les points de levage sont alors remis en place au niveau du dôme, et l'ensemble alors monobloc dôme + virole est monté d'une hauteur suffisante, pour permettre le déroulement d'une seconde bande métallique, afin de constituer la seconde virole (61) (figure 10 - partie gauche), à l'instar de la réalisation de la première virole (60).The lifting points are then put back in place at the dome, and the assembly then monobloc dome + ferrule is mounted at a sufficient height to allow the unwinding a second metal strip, to form the second ferrule (61) (Figure 10 - part left), like the first ferrule (60).

Lorsque la virole (61) est en place, l'ensemble dôme + première virole (60) est abaissé, afin de réaliser l'accostage du bord inférieur dudit ensemble sur le bord supérieur de ladite seconde virole (62). On ôte les points de levage dudit premier ensemble, et l'on procède, comme pour le premier ensemble à la soudure de celui-ci avec la seconde virole par rotation au niveau de la machine à souder. When the ferrule (61) is in place, the dome + first ferrule assembly (60) is lowered, so to land the lower edge of said assembly on the upper edge of said second ferrule (62). We remove the lifting points of said first set, and we proceed, as for the first assembly to weld it with the second ferrule by rotation at the welding machine.

Une fois cette opération terminée, on met en place, notamment par soudure, à la périphérie de la seconde virole, sensiblement à mi-hauteur de celle-ci un anneau circonférentiel ou ceinture (55). Cet anneau a d'abord pour fonction le renfort de la virole en question. Il est également destiné à conférer la stabilité contre le flambement de la cuve définitive. Il garantit en outre la rotondité de celle-ci lors de ses différentes phases de construction. Enfin, il est également destiné à servir d'organe de préhension lors des phases de levage successives. Il permet ainsi de répartir les efforts de charge, et en outre d'éviter les phénomènes de poinçonnage lors du levage.Once this operation has been completed, the periphery of the second ferrule, substantially at mid-height thereof a circumferential ring or belt (55). This ring firstly has the function of reinforcing the ferrule in question. he is also intended to provide stability against buckling of the final tank. It also guarantees the roundness of the latter during its various construction phases. Finally, it is also intended to serve as a gripping member during successive lifting phases. It thus allows to distribute the load forces, and moreover to avoid the phenomena of punching during the lifting.

Cet anneau est typiquement constitué d'une cornière métallique, ouverte en direction du bas.This ring typically consists of a metal angle, open in the direction of the bottom.

On repositionne alors les moyens de levage des mats sur cet anneau (55), et l'on procède au levage de l'ensemble dôme + virole (60) + virole (61), et l'on recommence ainsi de suite les opérations de déroulement de la bande métallique et de soudage, avec mise en place d'un anneau circonférentiel ou ceinture toutes les deux viroles (voir figure 11).The means for lifting the masts are then repositioned on this ring (55), and the lifting of the dome + ferrule (60) + ferrule (61) assembly, and the operations are thus repeated operations of unwinding the metal strip and welding, with the installation of a circumferential ring or belt every two ferrules (see figure 11).

On reproduit ainsi l'opération jusqu'à aboutir à la hauteur souhaitée de la cuve.The operation is thus repeated until it reaches the desired height of the tank.

On observe ainsi, que de par la mise en place d'un anneau circonférentiel toutes les deux viroles, la hauteur nécessaire des mats de levage est réduite, diminuant d'autant leur encombrement et les coûts y afférant.It is thus observed, that by the establishment of a circumferential ring both ferrules, the required height of the lifting masts is reduced, correspondingly reducing their congestion and related costs.

Lorsque la hauteur souhaitée de la cuve est atteinte, c'est à dire lorsque le nombre de viroles à mettre en place est obtenu, on procède à une nouvelle opération de levage, à l'instar de ce qui a été décrit précédemment, pour permettre d'effectuer le retrait de la machine à souder, et également l'escamotage des tables de déroulement associées aux mâts de levage. Puis, on redépose l'ensemble sur le fond, et enfin on effectue les opérations de soudure du bord inférieure de la virole inférieure sur le bord périphérique du fond déjà mis en place, ainsi que précisé.When the desired height of the tank is reached, i.e. when the number of rings to set up is obtained, we proceed to a new lifting operation, like what has been described above, to allow removal of the welding machine, and also the retraction of the unwinding tables associated with the lifting masts. Then, we redeposit the whole on the bottom, and finally we carry out the welding operations of the edge lower of the lower ferrule on the peripheral edge of the bottom already in place, as well as precise.

On a représenté en relation avec la figure 12 l'illustration des principales étapes de réalisation de la cuve en question.The illustration of the main stages of production has been shown in relation to FIG. 12 of the tank in question.

On conçoit tout l'intérêt du procédé et de l'installation conforme à l'invention.We understand all the interest of the process and the installation according to the invention.

Tout d'abord, ils permettent la réalisation d'enceintes de grande capacité de manière fiable et en toute sécurité, ce que l'on ne pouvait faire à ce jour. First, they allow the production of large capacity speakers reliably and safely, which we could not do to date.

Par ailleurs, la mise en oeuvre d'organes assurant la double fonction de levage et de rotation des viroles, permet de réduire la puissance des outils habituellement utilisés pour la réalisation de telles enceintes. Parallèlement, ils permettent de s'affranchir des grues et autres échafaudages, habituellement mis en oeuvre pour la réalisation de telles enceintes. Ils permettent également d'éviter le travail du personnel en hauteur, source de pertes de temps outre d'accidents.In addition, the implementation of bodies ensuring the dual function of lifting and rotation ferrules, reduces the power of the tools usually used for the realization such speakers. At the same time, they make it possible to get rid of cranes and other scaffolding, usually used for the construction of such enclosures. They also make it possible to avoid the work of staff at height, a source of time loss off accidents.

Enfin, l'invention permet d'optimiser la qualité de finition des soudures, et le maintien de l'aspect de surfaces des bandes métalliques mises en oeuvre, favorisant de fait la conformité de la cuve définitive avec les exigences sanitaires et alimentaires, lorsque celles-ci sont requises.Finally, the invention makes it possible to optimize the quality of finish of the welds, and the maintenance of the appearance of the surfaces of the metal strips used, thereby promoting compliance of the final tank with the sanitary and food requirements, when these are required.

Claims (8)

Procédé pour la réalisation d'une enveloppe ou enceinte métallique cylindrique de grandes dimensions par soudage de viroles successives, dans lequel : on déroule en continu une bande métallique (5) à partir d'une bobine (40), que l'on découpe lorsque la longueur souhaitée, correspondant au développement souhaité de la virole est atteinte ; on amène la partie de l'ouvrage déjà réalisée au dessus de cette virole, et on effectue l'accostage et la soudure horizontale en continu du bord supérieur de cette virole avec le bord inférieur dudit ouvrage au moyen d'une machine à souder, puis on effectue la soudure verticale de fermeture de ladite virole à l'arrêt ; caractérisé en ce qu'il consiste : à recevoir chaque bande métallique (5) en cours de déroulage sur une pluralité de tables de déroulement motorisées (8), sensiblement régulièrement réparties à la périphérie de l'enveloppe métallique à réaliser, et destinées à assurer selon un plan déterminé la progression de ladite bande selon un profil cylindrique ; à solidariser un anneau circonférentiel ou ceinture (55) à la périphérie d'une partie au moins des viroles ainsi réalisées ; à réaliser le levage de la partie de l'ouvrage ainsi réalisée au moyen de mats de levage, également sensiblement régulièrement répartis à la périphérie de l'enveloppe métallique à réaliser, lesdits mats étant simultanément accrochés au niveau d'un même anneau circonférentiel ou ceinture (55); à recommencer ces opérations jusqu'à atteindre la hauteur souhaitée de l'enveloppe à réaliser ; et, lorsque cette hauteur est atteinte, à soulever l'ensemble au moyen desdits mats de levage, afin de permettre l'évacuation desdites tables de roulement et de la machine à souder, et le dépôt dudit ensemble sur le fond de l'enveloppe, préalablement constitué et mis en place. Process for the production of a large cylindrical metallic envelope or enclosure by welding of successive ferrules, in which: a metallic strip (5) is continuously unwound from a reel (40), which is cut when the desired length, corresponding to the desired development of the shell, is reached; we bring the part of the structure already made above this shell, and we carry out docking and horizontal welding continuously from the upper edge of this shell with the lower edge of said structure by means of a welding machine, then carrying out the vertical closing welding of said ferrule when stationary; characterized in that it consists: to receive each metal strip (5) during unwinding on a plurality of motorized unwinding tables (8), substantially regularly distributed around the periphery of the metal casing to be produced, and intended to ensure, according to a determined plane, the progression of said strip according to a cylindrical profile; securing a circumferential ring or belt (55) at the periphery of at least part of the ferrules thus produced; to carry out the lifting of the part of the work thus produced by means of lifting mats, also substantially evenly distributed around the periphery of the metal casing to be produced, said mats being simultaneously hooked at the same circumferential ring or belt (55); to repeat these operations until reaching the desired height of the envelope to be produced; and, when this height is reached, lifting the assembly by means of said lifting masts, in order to allow the evacuation of said rolling tables and of the welding machine, and the deposition of said assembly on the bottom of the envelope, previously constituted and implemented. Procédé pour la réalisation d'une enveloppe ou enceinte métallique cylindrique selon la revendication 1, caractérisé en ce que les mats de levage sont assemblés au niveau des tables de déroulement.Method for producing a cylindrical metal enclosure or enclosure according to claim 1, characterized in that the lifting mats are assembled at the level of the unwinding tables. Procédé pour la réalisation d'une enveloppe ou enceinte métallique cylindrique selon l'une des revendications 1 et 2, caractérisé en ce que les anneaux circonférentiels ou ceinture (55) de levage ne sont pas solidarisés sur chacune des viroles, mais à intervalles périodiques, fonction notamment de la hauteur possible de levage conférée auxdits mats de levage. Method for producing a cylindrical metallic envelope or enclosure according to either of Claims 1 and 2, characterized in that the circumferential rings or lifting belt (55) are not secured to each of the ferrules, but at periodic intervals, function in particular of the possible lifting height conferred on said lifting masts. Installation pour la réalisation d'une enveloppe ou enceinte métallique cylindrique de grandes dimensions, constituées de l'assemblage successif de viroles, comprenant : un dispositif dérouleur d'une bande métallique (5) stockée sous forme de bobine, destinée à constituer lesdites viroles ; un poste de soudage fixe, susceptible de réaliser tant une soudure horizontale qu'une soudure verticale de ladite bande au niveau des viroles déjà réalisées ; caractérisée en ce qu'elle comprend en outre : une pluralité de tables de déroulement (8), sensiblement régulièrement réparties à la périphérie de l'enveloppe métallique à réaliser, et destinées à assurer selon un plan déterminé la progression de la bande métallique issue du dispositif dérouleur selon un profil cylindrique ; une pluralité de mats de levage, sensiblement régulièrement réparties à la périphérie de l'enveloppe métallique à réaliser, et destinés à assurer le levage de la première virole réalisée ou de la partie d'ouvrage déjà réalisée, ainsi que leur redescente au contact de la virole en cours de réalisation ou du fond de ladite enceinte. Installation for producing a large cylindrical metal envelope or enclosure, consisting of the successive assembly of ferrules, comprising: a device for unwinding a metal strip (5) stored in the form of a coil, intended to constitute said ferrules; a fixed welding station, capable of carrying out both horizontal and vertical welding of said strip at the level of the ferrules already made; characterized in that it further comprises: a plurality of unwinding tables (8), substantially regularly distributed around the periphery of the metal casing to be produced, and intended to ensure, along a determined plane, the progression of the metal strip coming from the unwinding device according to a cylindrical profile; a plurality of lifting masts, substantially regularly distributed around the periphery of the metal casing to be produced, and intended to ensure the lifting of the first ferrule produced or of the part of the structure already produced, as well as their descent in contact with the shell in progress or from the bottom of said enclosure. Installation pour la réalisation d'une enveloppe ou enceinte métallique cylindrique de grandes dimensions selon la revendication 4, caractérisée en ce que les tables de déroulement (8) comprennent : un socle (9), venant se fixer au sol, à la périphérie de la zone destinée à recevoir l'enveloppe cylindrique à réaliser ; une structure (11) mobile en translation horizontale sur le socle, et munie :
Figure 00120001
d'un premier galet (15), dit galet moteur, motorisé et à axe de révolution vertical,
Figure 00120002
d'un second galet (22), dit galet presseur, d'axe de révolution parallèle à celui du premier galet moteur, et monté libre en rotation sur une base (24) elle-même mobile en translation horizontale sous l'action d'un moyen de translation (25) solidaire de la structure mobile, de telle sorte à permettre d'exercer une pression par la génératrice dudit galet, contre le galet moteur (15), et ainsi à assurer la progression de la bande métallique ;
Figure 00120003
d'un rouleau à axe de rotation horizontal (27), positionné entre les deux galets moteur (15) et presseur (22) et affleurant sensiblement au niveau du bord inférieur des génératrices desdits galets, et destiné à recevoir le bord inférieur de la virole en cours de réalisation. Installation for producing a large cylindrical metallic envelope or enclosure according to claim 4, characterized in that the unwinding tables (8) comprise: a base (9), fixed to the ground, at the periphery of the zone intended to receive the cylindrical envelope to be produced; a structure (11) movable in horizontal translation on the base, and provided with:
Figure 00120001
a first roller (15), said motorized, motorized roller with a vertical axis of revolution,
Figure 00120002
a second roller (22), said pressure roller, with an axis of revolution parallel to that of the first drive roller, and mounted free in rotation on a base (24) itself movable in horizontal translation under the action of a translation means (25) integral with the mobile structure, so as to allow pressure to be exerted by the generator of said roller, against the drive roller (15), and thus to ensure the progression of the metal strip;
Figure 00120003
a roller with a horizontal axis of rotation (27), positioned between the two motor rollers (15) and presser (22) and substantially flush with the edge lower of the generators of said rollers, and intended to receive the lower edge of the shell in progress. Installation pour la réalisation d'une enveloppe ou enceinte métallique cylindrique de grandes dimensions selon la revendication 5, caractérisée en ce que la structure mobile (11) est mobile entre une position opérationnelle, dans laquelle elle reçoit la bande métallique (5) et une position escamotée sous l'action d'un vérin électrique ou pneumatique ou tout autre organe équivalent (13).Installation for producing a large cylindrical metallic envelope or enclosure according to claim 5, characterized in that the movable structure (11) is movable between an operational position, in which it receives the metallic strip (5) and a position retracted under the action of an electric or pneumatic cylinder or any other equivalent member (13). Installation pour la réalisation d'une enveloppe ou enceinte métallique cylindrique de grandes dimensions selon l'une des revendications 5 et 6, caractérisée en ce que le rouleau à axe de rotation horizontal (27) recevant le bord inférieur de la virole en cours de réalisation est constitué d'un matériau à durcissement structurel.Installation for the production of a large cylindrical metallic envelope or enclosure according to one of claims 5 and 6, characterized in that the roller with horizontal axis of rotation (27) receiving the lower edge of the ferrule in progress is made of a structurally hardened material. Installation pour la réalisation d'une enveloppe ou enceinte métallique cylindrique de grandes dimensions selon l'une des revendications 4 à 7, caractérisée en ce que les tables de déroulement sont chacune surmontées par les mâts de levage, de sorte que l'ensemble constitué par une table de déroulement et un mât de levage est monobloc.Installation for producing a large cylindrical metal enclosure or enclosure according to one of claims 4 to 7, characterized in that the unwinding tables are each surmounted by the lifting masts, so that the assembly constituted by an unwinding table and a lifting mast is in one piece.
EP03100885A 2003-04-03 2003-04-03 Method of constructing a cylindrical metal storage tank, and device for implementing this method Withdrawn EP1464418A1 (en)

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