EP1777482A1 - Filter grid for separating cleaning bodies from a carrier fluid of a heat exchanger - Google Patents

Filter grid for separating cleaning bodies from a carrier fluid of a heat exchanger Download PDF

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Publication number
EP1777482A1
EP1777482A1 EP06291623A EP06291623A EP1777482A1 EP 1777482 A1 EP1777482 A1 EP 1777482A1 EP 06291623 A EP06291623 A EP 06291623A EP 06291623 A EP06291623 A EP 06291623A EP 1777482 A1 EP1777482 A1 EP 1777482A1
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EP
European Patent Office
Prior art keywords
supports
lamellae
filter element
welded
heat exchanger
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EP06291623A
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German (de)
French (fr)
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EP1777482B1 (en
Inventor
Damien Thivent
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Technos et Cie
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Technos et Cie
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies

Definitions

  • the invention relates to the cleaning of heat exchangers (in particular of the tubular or plate type).
  • a tubular heat exchanger comprises, in a conventional manner, a plurality of tubes in which circulates a heat transfer fluid. To ensure the cleaning of the tubes, it is done, usually occasionally and repeatedly, circulate in the tubes, within the fluid, the cleaning bodies which pickle the inner walls of the tubes to prevent their fouling by the deposition of impurities conveyed by the fluid. These bodies - with a diameter slightly greater than the internal diameter of the tubes - are collected downstream of the heat exchanger and then reinjected upstream.
  • one or more separation grids which, while allowing the fluid to pass through, retain the cleaning bodies and guide them towards a recycling device.
  • This grid comprises a plurality of longitudinal reinforcements (called side members) interconnected by cross members and mounted on a pivot axis.
  • Filter elements are mounted (removably) between the frames.
  • Each filter element comprises a plurality of parallel strips whose spacing is smaller than the diameter of the cleaning bodies, connected by a plurality of parts called spacers, arranged perpendicularly to the lamellae.
  • the filtering element is metallic, generally made of stainless steel: the lamellae are welded to straight metal rods which form the spacers, these rods being in turn welded by their ends to plates (called cheeks) by which the element is attached to the side members.
  • This type of filter element is complex to manufacture.
  • the soldering of the struts to the cheeks is a particularly delicate operation because it is necessary to ensure a good flatness of the cheek, and a good parallelism of the cheeks between them, to allow mounting of the filter element between two longitudinal members by minimizing the games.
  • the filter element is made of a block by molding a synthetic material (polystyrene, PVC, or the like). If the manufacture is simplified compared to the first type presented above, there are in practice problems of mechanical strength: it happens in fact that a filter element breaks under the repeated impacts of the balls, or under the unexpected impact of debris of equivalent or larger size.
  • the invention aims in particular to overcome the aforementioned drawbacks of filtration grids using known filter elements.
  • This design facilitates the manufacture of the filter element, while ensuring good mechanical strength.
  • FIG. 1 shows a discharge duct 1 for a heat exchanger (not shown but whose general structure is, for example, in accordance with the patent application French FR 2 634 672 in the name of the plaintiff).
  • This pipe 1, tubular, is disposed downstream of the heat exchanger; it is traversed by a heat transfer fluid such as water, which carries spherical cleaning bodies (called “balls”) for stripping the pipes of the heat exchanger.
  • a heat transfer fluid such as water, which carries spherical cleaning bodies (called “balls") for stripping the pipes of the heat exchanger.
  • the balls are separated from the fluid by a filtration device 2 which comprises at least one filtering grid 3 mounted obliquely in the duct 1. More precisely, in accordance with the embodiment illustrated in the figures, the filtration device 2 comprises two grids 3 vis-à-vis mounted obliquely in the conduit 1 to jointly form a funnel separating the balls of the fluid and the guide to a recycling device (not shown) which reinjects the balls upstream of the heat exchanger.
  • Each grid 3 comprises a plurality of equidistant parallel beams 4, mounted on a common pivot axis 5, perpendicular to the longitudinal members 4 and rotatably mounted by each of its ends 6, 7, in two bearings 8 formed by substantially diametrically opposed holes practiced. in the wall of the duct 1.
  • the spars 4 are in the form of metal blades (made, in practice, stainless steel) which have a rectilinear upstream edge 9, and a curved downstream edge 10, bulged at the passage of the axis 5. Two adjacent spars define between them a corridor 11 with a substantially rectangular contour. In each corridor 11 is mounted a filter element 12 reported.
  • Each filter element 12 comprises a plurality of metal strips 13 parallel to each other and to longitudinal members 4, and whose spacing is less than the diameter of the balls, and a plurality of metal supports 14 arranged parallel to each other and perpendicular to the lamellae 13, and on which they are fixed.
  • each support 14 is in the form of a one-piece piece having a U-shaped profile, comprising a central core 15, which extends parallel to the axis 5, extended from and other by two legs 16, 17 substantially perpendicular to both the core 15 and the lamellae 13.
  • each support 14 is shaped by folding from a straight metal part.
  • the lamellae 13 are fixed to the supports 14 by welding. More precisely, as can be seen in FIG. 6, the lamellae 13 have a triangular profile in section, and have a flat upstream edge 18 and a sharp downstream edge 19, so as to limit the pressure drops during the passage of the fluid. .
  • the slats 13 are fixed to the supports 14 by their downstream edge 19, which is welded to a rib 20 projecting from an outer edge 21 - or leading edge - of each support 14.
  • the lamellae 13 are not only welded to the core 15 of the supports 14: in fact, a first series of lamellae 13 is welded to the webs 15 of the supports 14, and two other series of slats 13 are welded, on both sides of the webs 15, to the legs 16, 17.
  • the slats 13 of these last two series thus form, together with the corresponding legs 16, 17, cheeks 22, 23 through which the filter element 12 is fixed to the longitudinal members 4. Washers (not shown) can be welded on the cheeks 22, 23 for supporting fastening bolt heads passing through the longitudinal members 4.
  • a filter element 12 of the type described above has the advantage of simplicity of manufacture, while having a mechanical strength equivalent to that of the known filter elements made of steel.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The element has metal supports (14) arranged parallel to each other and perpendicular to parallel metal lamellas (13), where the lamellas have a triangular profile and are fixed on the supports by welding. Each support is a mono-block piece presenting a U-profile with a core (15) extended on both sides by two legs (16) perpendicular to the core. One series of the lamellas are welded to the cores of the supports and other series of the lamellas are welded to the legs. Each support has a rib (20) projected on an outer edge (21) on which the lamellas are welded. Independent claims are also included for the following: (1) a method of manufacturing a filtering element (2) a device for separating a carrier fluid of cleaning bodies.

Description

L'invention a trait au nettoyage des échangeurs thermiques (notamment de types tubulaires ou à plaques).The invention relates to the cleaning of heat exchangers (in particular of the tubular or plate type).

Un échangeur thermique tubulaire comprend, de manière classique, une pluralité de tubes dans lesquels circule un fluide caloporteur. Pour assurer le nettoyage des tubes, on fait, généralement de manière occasionnelle et répétée, circuler dans les tubes, au sein du fluide, des corps nettoyants qui décapent les parois internes des tubes pour éviter leur encrassement par le dépôt d'impuretés véhiculées par le fluide. Ces corps - d'un diamètre légèrement supérieur au diamètre interne des tubes - sont collectés en aval de l'échangeur thermique, puis réinjectés en amont.A tubular heat exchanger comprises, in a conventional manner, a plurality of tubes in which circulates a heat transfer fluid. To ensure the cleaning of the tubes, it is done, usually occasionally and repeatedly, circulate in the tubes, within the fluid, the cleaning bodies which pickle the inner walls of the tubes to prevent their fouling by the deposition of impurities conveyed by the fluid. These bodies - with a diameter slightly greater than the internal diameter of the tubes - are collected downstream of the heat exchanger and then reinjected upstream.

Afin de procéder à cette collecte, on dispose en aval de l'échangeur thermique, au sein d'un conduit d'évacuation, une ou plusieurs grilles de séparation qui, tout en laissant passer le fluide, retiennent les corps nettoyants et les guident vers un dispositif de recyclage.In order to carry out this collection, downstream of the heat exchanger, within a drainage duct, is provided one or more separation grids which, while allowing the fluid to pass through, retain the cleaning bodies and guide them towards a recycling device.

Une telle grille de séparation est connue de la demande de brevet français publiée sous le numéro FR 2 815 548 an nom de la demanderesse.Such a separation grid is known from the French patent application published under the number FR 2 815 548 an applicant's name.

Cette grille comprend une pluralité d'armatures longitudinales (appelées longerons) reliées entre elles par des traverses et montés sur un axe pivot. Des éléments filtrants sont montés (de manière amovible) entre les armatures. Chaque élément filtrant comprend une pluralité de lamelles parallèles dont l'écartement est inférieur au diamètre des corps nettoyants, reliées par une pluralité de pièces appelées entretoises, disposées perpendiculairement aux lamelles.This grid comprises a plurality of longitudinal reinforcements (called side members) interconnected by cross members and mounted on a pivot axis. Filter elements are mounted (removably) between the frames. Each filter element comprises a plurality of parallel strips whose spacing is smaller than the diameter of the cleaning bodies, connected by a plurality of parts called spacers, arranged perpendicularly to the lamellae.

On connaît au moins deux types de tels éléments filtrants. Suivant un premier type, l'élément filtrant est métallique, généralement en inox: les lamelles sont soudées à des tiges métalliques droites qui forment les entretoises, ces tiges étant à leur tour soudées par leurs extrémités à des plaques (appelées joues) par lesquelles l'élément est fixé aux longerons. Ce type d'élément filtrant est complexe à fabriquer. La soudure des entretoises aux joues se révèle une opération particulièrement délicate car il est nécessaire de garantir une bonne planéité de la joue, et un bon parallélisme des joues entre elles, afin de permettre un montage de l'élément filtrant entre deux longerons en minimisant les jeux. Or il est difficile de garantir une parfaite coplanarité des extrémités des entretoises.At least two types of such filter elements are known. According to a first type, the filtering element is metallic, generally made of stainless steel: the lamellae are welded to straight metal rods which form the spacers, these rods being in turn welded by their ends to plates (called cheeks) by which the element is attached to the side members. This type of filter element is complex to manufacture. The soldering of the struts to the cheeks is a particularly delicate operation because it is necessary to ensure a good flatness of the cheek, and a good parallelism of the cheeks between them, to allow mounting of the filter element between two longitudinal members by minimizing the games. However, it is difficult to guarantee perfect coplanarity of the ends of the spacers.

Suivant un deuxième type, l'élément filtrant est réalisé d'un bloc par moulage d'une matière synthétique (polystyrène, PVC, ou analogue). Si la fabrication s'en trouve simplifiée par rapport au premier type présenté ci-dessus, on rencontre en pratique des problème de résistance mécanique: il arrive en effet qu'un élément filtrant se brise sous les impacts répétés des boules, ou sous l'impact inopiné d'un débris de taille équivalente ou supérieure.According to a second type, the filter element is made of a block by molding a synthetic material (polystyrene, PVC, or the like). If the manufacture is simplified compared to the first type presented above, there are in practice problems of mechanical strength: it happens in fact that a filter element breaks under the repeated impacts of the balls, or under the unexpected impact of debris of equivalent or larger size.

L'invention vise notamment à remédier aux inconvénients précités des grilles de filtration utilisant des éléments filtrants connus.The invention aims in particular to overcome the aforementioned drawbacks of filtration grids using known filter elements.

A cet effet, l'invention propose une grille de filtration destinée à séparer d'un fluide porteur des corps nettoyants provenant d'un échangeur thermique, cette grille comprenant une pluralité de longerons parallèles équidistants, montés sur un axe pivot commun perpendiculaire aux longerons, et une pluralité d'éléments filtrants comprenant chacun:

  • une pluralité de lamelles métalliques parallèles, et
  • une pluralité de supports (14) métalliques disposées parallèlement les uns aux autres et perpendiculairement aux lamelles (13), et sur lesquels celles-ci sont fixées,
dans laquelle chaque support est une pièce monobloc présentant un profil en U, qui comprend une âme prolongée de part et d'autre par deux jambages sensiblement perpendiculaires à l'âme.For this purpose, the invention proposes a filtering grid intended to separate from the carrier fluid cleaning bodies coming from a heat exchanger, this grid comprising a plurality of equidistant parallel spars, mounted on a common pivot axis perpendicular to the spars, and a plurality of filter elements each comprising:
  • a plurality of parallel metal strips, and
  • a plurality of metal supports (14) arranged parallel to each other and perpendicular to the lamellae (13), and to which they are fixed,
in which each support is a single piece having a U-shaped profile, which comprises a soul extended on both sides by two legs substantially perpendicular to the core.

Cette conception facilite la fabrication de l'élément filtrant, tout en garantissant une bonne tenue mécanique.This design facilitates the manufacture of the filter element, while ensuring good mechanical strength.

L'invention a aussi pour objet un procédé de fabrication d'un élément filtrant destiné à une telle grille de filtration, qui comprend les étapes consistant à :

  • fournir une pluralité de lamelles métalliques,
  • fournir une pluralité de supports sous forme de pièces métalliques droites,
  • souder les lamelles, disposées parallèlement les unes aux autres, aux supports disposés parallèlement les uns aux autres et perpendiculairement aux lamelles,
  • plier les supports en U.
The invention also relates to a method of manufacturing a filter element for such a filtering grid, which comprises the steps of:
  • provide a plurality of metal slats,
  • providing a plurality of supports in the form of straight metal parts,
  • welding the slats, arranged parallel to each other, to the supports arranged parallel to each other and perpendicular to the slats,
  • fold the U-shaped brackets

D'autres objets et avantages de l'invention apparaîtront à la lumière de la description faite ci-après en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue d'élévation en perspective montrant un conduit d'évacuation d'un échangeur thermique, équipé de grilles de séparation ;
  • la figure 2 est une vue en plan de dessus du conduit de la figure 1 ;
  • la figure 3 est une vue en perspective montrant une grille de séparation destinée à être montée dans un conduit tel que représenté sur les figures 1 et 2 ;
  • la figure 4 est une vue de la grille de la figure 3, sur laquelle sont montés des éléments filtrants ;
  • la figure 5 est une vue en perspective montrant un élément filtrant destiné à être monté sur une grille telle que représentée sur les figures 3 et 4 ;
  • et la figure 6 est une vue à échelle agrandie montrant un détail de l'élément filtrant de la figure 5.
Other objects and advantages of the invention will become apparent in the light of the description given hereinafter with reference to the appended drawings in which:
  • Figure 1 is a perspective elevation view showing a discharge pipe of a heat exchanger, equipped with separation grids;
  • Figure 2 is a top plan view of the conduit of Figure 1;
  • Figure 3 is a perspective view showing a separation grid for mounting in a conduit as shown in Figures 1 and 2;
  • Figure 4 is a view of the grid of Figure 3, on which are mounted filter elements;
  • Figure 5 is a perspective view showing a filter element for mounting on a grid as shown in Figures 3 and 4;
  • and FIG. 6 is an enlarged view showing a detail of the filter element of FIG. 5.

Sur la figure 1 est représenté un conduit 1 d'évacuation pour un échangeur thermique (non représenté mais dont la structure générale est par exemple conforme à la demande de brevet français FR 2 634 672 au nom de la demanderesse).FIG. 1 shows a discharge duct 1 for a heat exchanger (not shown but whose general structure is, for example, in accordance with the patent application French FR 2 634 672 in the name of the plaintiff).

Ce conduit 1, tubulaire, est disposé en aval de l'échangeur thermique ; il est parcouru par un fluide caloporteur tel que de l'eau, qui charrie des corps nettoyants sphériques (appelées « boules ») assurant le décapage des canalisations de l'échangeur thermique.This pipe 1, tubular, is disposed downstream of the heat exchanger; it is traversed by a heat transfer fluid such as water, which carries spherical cleaning bodies (called "balls") for stripping the pipes of the heat exchanger.

Les boules sont séparées du fluide par un dispositif 2 de filtration qui comprend au moins une grille 3 de filtration montée de manière oblique dans le conduit 1. Plus précisément, conformément au mode de réalisation illustré sur les figures, le dispositif 2 de filtration comprend deux grilles 3 en vis-à-vis montées de manière oblique dans le conduit 1 pour former conjointement un entonnoir séparant les boules du fluide et les guide vers un dispositif de recyclage (non représenté) qui réinjecte les boules en amont de l'échangeur thermique.The balls are separated from the fluid by a filtration device 2 which comprises at least one filtering grid 3 mounted obliquely in the duct 1. More precisely, in accordance with the embodiment illustrated in the figures, the filtration device 2 comprises two grids 3 vis-à-vis mounted obliquely in the conduit 1 to jointly form a funnel separating the balls of the fluid and the guide to a recycling device (not shown) which reinjects the balls upstream of the heat exchanger.

Chaque grille 3 comprend une pluralité de longerons 4 parallèles équidistants, montés sur un axe pivot 5 commun, perpendiculaire aux longerons 4 et monté en rotation, par chacune de ses extrémités 6, 7, dans deux paliers 8 formés par des trous sensiblement diamétralement opposés pratiqués dans la paroi du conduit 1.Each grid 3 comprises a plurality of equidistant parallel beams 4, mounted on a common pivot axis 5, perpendicular to the longitudinal members 4 and rotatably mounted by each of its ends 6, 7, in two bearings 8 formed by substantially diametrically opposed holes practiced. in the wall of the duct 1.

Les longerons 4 se présentent sous la forme de lames métalliques (réalisées, en pratique, en acier inoxydable) qui présentent un bord amont 9 rectiligne, et un bord aval 10 courbe, renflé au niveau du passage de l'axe 5. Deux longerons adjacents définissent entre eux un couloir 11 à contour sensiblement rectangulaire. Dans chaque couloir 11 est monté un élément filtrant 12 rapporté.The spars 4 are in the form of metal blades (made, in practice, stainless steel) which have a rectilinear upstream edge 9, and a curved downstream edge 10, bulged at the passage of the axis 5. Two adjacent spars define between them a corridor 11 with a substantially rectangular contour. In each corridor 11 is mounted a filter element 12 reported.

Chaque élément filtrant 12 comprend une pluralité de lamelles 13 métalliques parallèles entre elles et aux longerons 4, et dont l'écartement est inférieur au diamètre des boules, ainsi qu'une pluralité de supports 14 métalliques disposés parallèlement les uns aux autres et perpendiculairement aux lamelles 13, et sur lesquels celles-ci sont fixées.Each filter element 12 comprises a plurality of metal strips 13 parallel to each other and to longitudinal members 4, and whose spacing is less than the diameter of the balls, and a plurality of metal supports 14 arranged parallel to each other and perpendicular to the lamellae 13, and on which they are fixed.

Comme cela est visible sur les figures 5 et 6, chaque support 14 se présente sous la forme d'une pièce monobloc présentant un profil en U, comprenant une âme centrale 15, qui s'étend parallèlement à l'axe 5, prolongée de part et d'autre par deux jambages 16, 17 sensiblement perpendiculaires à la fois à l'âme 15 et aux lamelles 13.As can be seen in FIGS. 5 and 6, each support 14 is in the form of a one-piece piece having a U-shaped profile, comprising a central core 15, which extends parallel to the axis 5, extended from and other by two legs 16, 17 substantially perpendicular to both the core 15 and the lamellae 13.

Comme nous le verrons ci-après, chaque support 14 est mis en forme par pliage à partir d'une pièce métallique droite.As will be seen below, each support 14 is shaped by folding from a straight metal part.

Suivant un mode de réalisation préféré, les lamelles 13 sont fixées aux supports 14 par soudage. Plus précisément, comme cela est visible sur la figure 6, les lamelles 13 présentent en section un profil triangulaire, et possèdent un bord amont 18 plat, et un bord aval 19 pointu, de manière à limiter les pertes de charge lors du passage du fluide.According to a preferred embodiment, the lamellae 13 are fixed to the supports 14 by welding. More precisely, as can be seen in FIG. 6, the lamellae 13 have a triangular profile in section, and have a flat upstream edge 18 and a sharp downstream edge 19, so as to limit the pressure drops during the passage of the fluid. .

Les lamelles 13 sont fixées aux supports 14 par leur bord aval 19, lequel est soudé à une nervure 20 réalisée en saillie sur un bord externe 21 - ou bord d'attaque - de chaque support 14.The slats 13 are fixed to the supports 14 by their downstream edge 19, which is welded to a rib 20 projecting from an outer edge 21 - or leading edge - of each support 14.

Comme cela est également visible sur les figures 5 et 6, les lamelles 13 ne sont pas seulement soudées à l'âme 15 des supports 14 : en effet, une première série de lamelles 13 est soudée aux âmes 15 des supports 14, et deux autres séries de lamelles 13 sont soudées, de part et d'autre des âmes 15, aux jambages 16, 17. Les lamelles 13 de ces deux dernières séries forment ainsi, conjointement avec les jambages 16, 17 correspondants, des joues 22, 23 par lesquelles l'élément filtrant 12 est fixé aux longerons 4. Des rondelles (non représentées) peuvent être soudées sur les joues 22, 23 pour l'appui de têtes de boulons de fixation traversant les longerons 4.As is also visible in FIGS. 5 and 6, the lamellae 13 are not only welded to the core 15 of the supports 14: in fact, a first series of lamellae 13 is welded to the webs 15 of the supports 14, and two other series of slats 13 are welded, on both sides of the webs 15, to the legs 16, 17. The slats 13 of these last two series thus form, together with the corresponding legs 16, 17, cheeks 22, 23 through which the filter element 12 is fixed to the longitudinal members 4. Washers (not shown) can be welded on the cheeks 22, 23 for supporting fastening bolt heads passing through the longitudinal members 4.

Pour fabriquer un élément filtrant 12 tel que décrit ci-dessus, on procède comme suit:

  • on fournit une pluralité de lamelles 13 métalliques, et une pluralité de supports sous forme de pièces métalliques droites,
  • on soude les lamelles 13, disposées parallèlement les unes aux autres, aux supports 14 disposés parallèlement les uns aux autres et perpendiculairement aux lamelles 13 ;
  • enfin, on plie les supports 14 en U pour former l'âme 15 et les jambages 16.
To manufacture a filter element 12 as described above, the following procedure is followed:
  • a plurality of metal strips 13 are provided, and a plurality of supports in the form of straight metal parts,
  • the lamellae 13, arranged parallel to one another, are welded to the supports 14 arranged parallel to each other and perpendicular to the lamellae 13;
  • finally, the U-shaped supports 14 are folded to form the core 15 and the jambs 16.

Un élément filtrant 12 du type décrit ci-dessus présente l'avantage de la simplicité de fabrication, tout en ayant une résistance mécanique équivalente à celle des éléments filtrants connus en acier.A filter element 12 of the type described above has the advantage of simplicity of manufacture, while having a mechanical strength equivalent to that of the known filter elements made of steel.

Claims (9)

Grille (3) de filtration destinée à séparer d'un fluide porteur des corps nettoyants provenant d'un échangeur thermique, cette grille (3) comprenant une pluralité de longerons (4) parallèles équidistants, montés sur un axe pivot (5) commun perpendiculaire aux longerons (4), et une pluralité d'éléments filtrants (12) comprenant chacun: - une pluralité de lamelles (13) métalliques parallèles, et - une pluralité de supports (14) métalliques disposées parallèlement les uns aux autres et perpendiculairement aux lamelles (13), et sur lesquels celles-ci sont fixées, caractérisée en ce chaque support (14) est une pièce monobloc présentant un profil en U, qui comprend une âme (15) prolongée de part et d'autre par deux jambages (16) sensiblement perpendiculaires à l'âme (15).Filtration grid (3) for separating cleaning bodies from a heat exchanger from a heat exchanger, said grid (3) comprising a plurality of equidistant parallel beams (4) mounted on a perpendicular common pivot axis (5) the spars (4), and a plurality of filter elements (12) each comprising: a plurality of parallel metal strips (13), and a plurality of metal supports (14) arranged parallel to each other and perpendicular to the lamellae (13), and on which these are fixed, characterized in that each support (14) is a one-piece piece having a U-shaped profile, which comprises a core (15) extended on either side by two legs (16) substantially perpendicular to the core (15). Grille de filtration selon la revendication 1, caractérisée en ce que chaque support (14) d'un élément filtrant (12) est mis en forme par pliage à partir d'une pièce métallique droite.Filtration grid according to claim 1, characterized in that each support (14) of a filter element (12) is shaped by folding from a straight metal part. Grille de filtration selon la revendication 1 ou 2, caractérisée en ce que les lamelles (13) d'un élément filtrant (12) sont soudées aux supports (14).Filtration grid according to claim 1 or 2, characterized in that the lamellae (13) of a filter element (12) are welded to the supports (14). Grille de filtration selon la revendication 3, caractérisée en ce qu'une première série de lamelles (13) d'un élément filtrant (12) est soudée aux âmes (15) des supports (14), et en ce que deux autres séries de lamelles (13) sont soudées aux jambages (16) des supports (14).Filtration grid according to claim 3, characterized in that a first series of lamellae (13) of a filter element (12) is welded to the webs (15) of the supports (14), and in that two other series of lamellae (13) are welded to the legs (16) of the supports (14). Grille de filtration (12) selon l'une des revendications 1 à 4, caractérisée en ce que les lamelles (13) d'un élément filtrant (12) présentent en section un profil triangulaire, et possèdent un bord amont (18) plat, et un bord aval (19) pointu.Filtration grid (12) according to one of claims 1 to 4, characterized in that the lamellae (13) of a filter element (12) have in section a triangular profile, and have a flat upstream edge (18), and a sharp downstream edge (19). Grille de filtration selon la revendication 3 ou 4, prise en combinaison avec la revendication 5, caractérisé en ce que les lamelles (13) d'un élément filtrant (12) sont soudées aux supports (14) par leur bord aval (19).Filtration grid according to claim 3 or 4, taken in combination with claim 5, characterized in that the lamellae (13) of a filter element (12) are welded to the supports (14) by their downstream edge (19). Grille de filtration selon la revendication 6, caractérisé en ce que chaque support (14) d'un élément filtrant (12) présente une nervure (20) en saillie sur un bord externe (21), sur laquelle les lamelles (13) sont soudées.Filtration grid according to claim 6, characterized in that each support (14) of a filter element (12) has a rib (20) projecting from an outer edge (21) on which the lamellae (13) are welded. . Procédé de fabrication d'un élément filtrant (12) destiné à une grille de filtration selon l'une des revendications 1 à 7, qui comprend les étapes consistant à : - fournir une pluralité de lamelles (13) métalliques, - fournir une pluralité de supports (14) sous forme de pièces métalliques droites, - souder les lamelles (13), disposées parallèlement les unes aux autres, aux supports (14) disposés parallèlement les uns aux autres et perpendiculairement aux lamelles (13), - plier les supports (14) en U. A method of manufacturing a filter element (12) for a filter screen according to one of claims 1 to 7, which comprises the steps of: providing a plurality of metal strips (13), providing a plurality of supports (14) in the form of straight metal pieces, - welding the slats (13), arranged parallel to each other, the supports (14) arranged parallel to each other and perpendicular to the slats (13), - bend the supports (14) in U. Dispositif (2) pour séparer d'un fluide porteur des corps nettoyants provenant d'un échangeur thermique, ce dispositif comprenant un conduit (1) d'évacuation et, montée de manière oblique dans celui-ci, au moins une grille (3) de filtration selon l'une des revendications 1 à 7.Device (2) for separating from a carrier fluid cleaning bodies coming from a heat exchanger, this device comprising a discharge duct (1) and, mounted obliquely therein, at least one grate (3) Filtration device according to one of Claims 1 to 7.
EP06291623A 2005-10-19 2006-10-18 Filter grid for separating cleaning bodies from a carrier fluid of a heat exchanger Not-in-force EP1777482B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0510668A FR2892185B1 (en) 2005-10-19 2005-10-19 FILTERING ELEMENT FOR A FILTRATION GRID FOR SEPARATING FROM A CARRIER FLUID CLEANING BODIES FROM A HEAT EXCHANGER.

Publications (2)

Publication Number Publication Date
EP1777482A1 true EP1777482A1 (en) 2007-04-25
EP1777482B1 EP1777482B1 (en) 2009-01-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06291623A Not-in-force EP1777482B1 (en) 2005-10-19 2006-10-18 Filter grid for separating cleaning bodies from a carrier fluid of a heat exchanger

Country Status (5)

Country Link
EP (1) EP1777482B1 (en)
AT (1) ATE421672T1 (en)
DE (1) DE602006004940D1 (en)
ES (1) ES2321441T3 (en)
FR (1) FR2892185B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142407A (en) * 1983-06-30 1985-01-16 Ishikawajima Harima Heavy Ind Cleaning heat exchangers
EP0352191A1 (en) * 1988-07-20 1990-01-24 LE METAL DEPLOYE, Société Anonyme dite: Cableway made of a mesh of soldered metallic wires
US20010009192A1 (en) * 2000-01-24 2001-07-26 Krieg & Zivy Industries High-strength wire cable duct
US20020017379A1 (en) * 2000-07-03 2002-02-14 Philip Jackson Grid for intercepting solid elements circulated in a heat exchanger to clean it, and a control installation for such elements including such a grid
FR2815548A1 (en) * 2000-10-25 2002-04-26 Technos Et Cie Separator grille for solid cleaning elements carried in fluid through tubes of condenser has detachable filters between lengthwise bars

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142407A (en) * 1983-06-30 1985-01-16 Ishikawajima Harima Heavy Ind Cleaning heat exchangers
EP0352191A1 (en) * 1988-07-20 1990-01-24 LE METAL DEPLOYE, Société Anonyme dite: Cableway made of a mesh of soldered metallic wires
US20010009192A1 (en) * 2000-01-24 2001-07-26 Krieg & Zivy Industries High-strength wire cable duct
US20020017379A1 (en) * 2000-07-03 2002-02-14 Philip Jackson Grid for intercepting solid elements circulated in a heat exchanger to clean it, and a control installation for such elements including such a grid
FR2815548A1 (en) * 2000-10-25 2002-04-26 Technos Et Cie Separator grille for solid cleaning elements carried in fluid through tubes of condenser has detachable filters between lengthwise bars

Also Published As

Publication number Publication date
ATE421672T1 (en) 2009-02-15
FR2892185A1 (en) 2007-04-20
FR2892185B1 (en) 2008-12-26
EP1777482B1 (en) 2009-01-21
DE602006004940D1 (en) 2009-03-12
ES2321441T3 (en) 2009-06-05

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