EP0027094A1 - Steam generator water chambers - Google Patents

Steam generator water chambers Download PDF

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Publication number
EP0027094A1
EP0027094A1 EP80401440A EP80401440A EP0027094A1 EP 0027094 A1 EP0027094 A1 EP 0027094A1 EP 80401440 A EP80401440 A EP 80401440A EP 80401440 A EP80401440 A EP 80401440A EP 0027094 A1 EP0027094 A1 EP 0027094A1
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EP
European Patent Office
Prior art keywords
plate
hemispherical bottom
water box
partition plate
circular groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80401440A
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German (de)
French (fr)
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EP0027094B1 (en
Inventor
Michel Batistoni
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Areva NP SAS
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Framatome SA
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Publication date
Application filed by Framatome SA filed Critical Framatome SA
Publication of EP0027094A1 publication Critical patent/EP0027094A1/en
Application granted granted Critical
Publication of EP0027094B1 publication Critical patent/EP0027094B1/en
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/22—Drums; Headers; Accessories therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions

Definitions

  • the invention relates to improvements in the production of water boxes for heat exchangers and in particular steam generators.
  • steam generators which include a bundle of tubes traversed by the primary hot water circuit, placed in an enclosure in which the water in the secondary circuit is transformed into steam.
  • the tubes of the primary circuit each form a U, the ends of which are fixed to a tubular plate provided with two series of orifices corresponding respectively to the inlet and the outlet of the primary fluid.
  • the water box used for the supply and evacuation of the primary fluid is limited to its upper part by the tubular plate on which is fixed a hemispherical bottom separated into two parts by a semicircular partition plate placed in a plane diametrical.
  • the water box is thus divided into two chambers, supply and discharge respectively, and the hemispherical bottom is therefore provided with pipes for connection of the pipes, respectively for the arrival and exit of the primary fluid.
  • the hemispherical bottom is also provided with manholes allowing access to each of the two chambers of the water box.
  • the tubular plate is made of carbon steel coated with stainless steel
  • the hemispherical bottom is of cast or forged steel
  • the partition plate is made of solid stainless steel.
  • the division of the hemispherical bottom into two chambers has another drawback. Indeed, it is sometimes necessary to access the interior of the water box for checking or maintenance operations. In this case, it is imperative to completely empty the water boot of the contaminated water it contains. For this purpose, it is necessary, in each chamber to drill at the lower part of the hemispherical bottom of the purge orifices which open into the inlet or outlet manifold of the primary fluid. But it is also necessary to drill other drain orifices in the internal wall of the manhole so as to completely empty the space - limited by the manhole closing plate and its cylindrical internal face placed in the thickness of the hemispherical bottom.
  • the partition plate fits with play over its entire periphery in a circular groove and a diametrical groove formed respectively on the internal walls of the hemispherical bottom and of the tubular plate and the hemispherical bottom is crossed by at least a purge orifice opening at the lowest point of the circular groove for fitting the plate, said orifice being capable of communicating with the two chambers of the water box.
  • the partition plate is mounted so that it can expand freely without interfering with the differential deformations of the tubular plate and the hemispherical bottom. It has in fact been found that it is possible to keep the function of the separating plate of the water boot in two chambers, by reducing by-pass to a minimum, without rigidly fixing it to the walls of the water boot. In this way, the deformations of the box. are much easier to predict, and we eliminate all the difficulties inherent in making welds.
  • the water boot is shown in section limited to its upper part by the tubular plate 1 and to its lower part by the hemispherical bottom 2.
  • the partition plate which has been removed in FIG. 2, divides the water box into two chambers 21 and 22, respectively for admission and discharge of the primary fluid. This circulates from one chamber to another in U-tubes, not shown, the ends of which correspond to orifices 10. arranged in the tube plate.
  • the hemispherical bottom is provided, for each of the chambers 21 and 22, with a pipe 23 to which the primary fluid circulation pipe is connected and with a manhole 24 allowing access to the interior of the chamber corresponding.
  • FIG. 2 For the convenience of the drawing, there is shown in arbitrary positions, in FIG. 2, the supply tube 23 opening into the chamber 21 and a manhole 24 opening into the chamber 22.
  • the partition plate is represented from the front in FIG. 3. It has, in a conventional manner the shape of a semicircle, and as seen in FIG. 4, it is preferably provided with a thinning over all its periphery. In this way, it can penetrate with play in grooves made on the tube plate 1 and on the hemispherical bottom 2.
  • the upper groove 11 is constituted by a recess made in the underside of the tube plate, and in which engages the upper rectilinear edge 31 of the partition plate 3.
  • the circular groove may consist of two parallel ribs 25 spaced from each other by a distance substantially equal to the thickness of the partition plate 3 and welded to the hemispherical bottom 2.
  • the plate 3 penetrates with play between the two ribs 25.
  • the partition plate 3 is made to rest directly on the ribs 25, for example by means of shims. support 32.
  • the hemispherical bottom 2 is crossed at its lowest point, by an orifice 26 which opens in this way at the lowest point of the circular groove, between the two ribs 25.
  • These are provided with passages 27 which allow the orifice 26 to communicate with the two chambers 21 and 22 of the water box.
  • the partition plate 3 is independent of the walls limiting the water boot. Indeed, it is simply supported on the hemispherical bottom 2 by the shims 32 and its upper part can slide freely inside the groove 11 of the tubular plate 1. Thus all the deformations and residual stresses due to the fixing by welding of the partition plate in the conventional embodiments. But in addition, the partition plate does not intervene in the deformations of the water boot which can be calculated and therefore controlled much more easily.
  • the fitting of the partition plate facilitates docking of the bottom on the tubular plate.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Sewage (AREA)

Abstract

L'invention a pour objet une boîte à eau d'échangeur de chaleur limitée par un fond hémisphérique et une plaque tubulaire sur laquelle sont fixées les extrémités des tubes en U de l'échangeur, de part et d'autre d'une plaque de participation séparant la boîte à eau en deux chambres, respectivement d'alimentation et d'évacuation. Selon l'invention, la plaque de partition (3) s'emboîte avec jeu sur toute sa périphérie dans une rainure circulaire et une rainure diamétrale (11) ménagées respectivement sur les parois internes du fond hémisphérique (2) et de la plaque tubulaire (1) et le fond hémisphérique (2) est traversé par au moins un orifice de purge (26) débouchant au point le plus bas de la rainure circulaire d'emboîtement de la plaque. L'invention s'applique spécialement à la construction des générateurs de vapeur.The subject of the invention is a heat exchanger water box limited by a hemispherical bottom and a tubular plate on which the ends of the U-shaped tubes of the exchanger are fixed, on either side of a plate of participation separating the water box into two chambers, respectively supply and discharge. According to the invention, the partition plate (3) fits with play over its entire periphery in a circular groove and a diametrical groove (11) formed respectively on the internal walls of the hemispherical bottom (2) and of the tubular plate ( 1) and the hemispherical bottom (2) is crossed by at least one bleed orifice (26) opening at the lowest point of the circular groove for fitting the plate. The invention applies especially to the construction of steam generators.

Description

L'invention a pour objet des perfectionnements à la réalisation des boîtes à eau d'échangeur de chaleur et notamment de générateur de vapeur.The invention relates to improvements in the production of water boxes for heat exchangers and in particular steam generators.

On sait que dans les centrales nucléaires, et en particulier dans les centrales dites à eau préssurisée, l'eau chauffée dans le réacteur nucléaire sert à produire de la vapeur dans des échangeurs de chaleur appelés générateurs de vapeur, qui comportent un faisceau de tubes parcouru par le circuit primaire d'eau chaude, placé dans une enceinte dans laquelle l'eau du circuit secondaire est transformée en vapeur.It is known that in nuclear power plants, and in particular in so-called pressurized water power plants, the water heated in the nuclear reactor is used to produce steam in heat exchangers called steam generators, which include a bundle of tubes traversed by the primary hot water circuit, placed in an enclosure in which the water in the secondary circuit is transformed into steam.

Dans le cas le plus courant, les tubes du circuit primaire forment chacun un U dont les extrémités sont fixées sur une plaque tubulaire munie de deux séries d'orifices correspondant respectivement à l'entrée et à la sortie du fluide primaire.In the most common case, the tubes of the primary circuit each form a U, the ends of which are fixed to a tubular plate provided with two series of orifices corresponding respectively to the inlet and the outlet of the primary fluid.

La boîte à eau servant à l'alimentation et à l'évacuation du fluide primaire est limitée à sa partie supérieure par la plaque tubulaire sur laquelle est fixé un fond hémisphérique séparé en deux parties par une plaque de partition demi-circulaire placée dans un plan diamétral. La boîte à eau est ainsi divisée en deux chambres, respectivement d'alimentation et d'évacuation et le fond hémisphérique est donc muni de tubulures de branchement des conduites, respectivement d'arrivée et de sortie du fluide primaire. D'autre part, le fond hémisphérique est également muni de trous d'homme permettant d'accéder à chacune des deux chambres de la boîte à eau.The water box used for the supply and evacuation of the primary fluid is limited to its upper part by the tubular plate on which is fixed a hemispherical bottom separated into two parts by a semicircular partition plate placed in a plane diametrical. The water box is thus divided into two chambers, supply and discharge respectively, and the hemispherical bottom is therefore provided with pipes for connection of the pipes, respectively for the arrival and exit of the primary fluid. On the other hand, the hemispherical bottom is also provided with manholes allowing access to each of the two chambers of the water box.

Jusqu'à présent, il a semblé nécessaire de souder la plaque de partition sur la plaque tubulaire le long de son bord rectiligne supérieur et sur le fond hémisphérique le long de son bord circulaire. Or, généralement, la plaque tubulaire est en acier au carbone revêtu d'acier inoxydable, le fond hémisphérique est en acier moulé ou forgé et la plaque de partition est en acier inoxydable massif. Il en résulte que les soudures sont difficiles à rédiser et à contrôler, le soudage génère des déformations qui rendent délicat l'accostage du fond sur la plaque tubulaire lors du montage de la boite à eau et les contraintes résiduelles induites ne peuvent pas toujours être éliminées par détensionnement. Jusqu'à présent, on n'a pu résoudre que partiellement ces différents problèmes, par exemple en fixant sur la face inférieure de la plaque tubulaire une attente qui facilite la soudure de la plaque de partition.Until now, it has seemed necessary to weld the partition plate on the tubular plate along its upper rectilinear edge and on the hemispherical bottom along its circular edge. However, generally, the tubular plate is made of carbon steel coated with stainless steel, the hemispherical bottom is of cast or forged steel and the partition plate is made of solid stainless steel. As a result, the welds are difficult to reduce and to control, the welding generates deformations which make it difficult to dock the bottom on the tube plate during assembly of the water box and the residual stresses induced cannot always be eliminated. by stress relieving. Until now, these various problems have only been partially resolved, for example by fixing a wait on the underside of the tube plate which facilitates te the soldering of the partition plate.

Mais d'autre part, en raison des déformations différentielles de la plaque tubulaire et du fond hémisphérique, le calcul du comportement mécanique.de la plaque de partition liée rigidement aux deux pièces est très délicat.But on the other hand, due to the differential deformations of the tube plate and the hemispherical bottom, the calculation of the mechanical behavior of the partition plate rigidly connected to the two parts is very delicate.

Par ailleurs, la division du fond hémisphérique en deux chambres présente un autre inconvénient. En effet, il est parfois nécessaire d'accéder à l'intérieur de la boîte à eau pour des opérations de vérification ou d'entretien. Il est impératif dans ce cas de vider entièrement la botte à eau de l'eau contaminée qu'elle contient. Dans ce but, il faut, dans chaque chambre percer à la partie inférieure du fond hémisphérique des orifices de purge qui débouchent dans la tubulure d'arrivée ou de sortie du fluide primaire. Mais il faut également percer d'autres orifices de purge dans la paroi interne du trou d'homme de façon à vider complètement l'es- pace-limité par la plaque de fermeture du trou d'homme et sa face interne cylindrique placée dans l'épaisseur du fond hémisphérique.Furthermore, the division of the hemispherical bottom into two chambers has another drawback. Indeed, it is sometimes necessary to access the interior of the water box for checking or maintenance operations. In this case, it is imperative to completely empty the water boot of the contaminated water it contains. For this purpose, it is necessary, in each chamber to drill at the lower part of the hemispherical bottom of the purge orifices which open into the inlet or outlet manifold of the primary fluid. But it is also necessary to drill other drain orifices in the internal wall of the manhole so as to completely empty the space - limited by the manhole closing plate and its cylindrical internal face placed in the thickness of the hemispherical bottom.

Ces différents orifices de purge sont difficiles à usiner et risquent toujours d'être bouchés par des dép8ts. D'autre part, ils peuvent légèrement affaiblir la paroi du fond hémisphérique à la naissance des tubulures.These different drain holes are difficult to machine and are always liable to be blocked by deposits. On the other hand, they can slightly weaken the wall of the hemispherical bottom when the tubes are born.

Les perfectionnements selon la présente invention permettent de résoudre l'ensemble de ces difficultés.The improvements according to the present invention make it possible to resolve all of these difficulties.

Conformément à l'invention, la plaque de partition s'emboîte avec jeu sur toute sa périphérie dans une rainure circulaire et une rainure diamétrale ménagées respectivement sur les parois internes du fond hémisphérique et de la plaque tubulaire et le fond hémisphérique est traversé par au moins un orifice de purge débouchant au point le plus bas de la raînu- re circulaire d'emboîtement de la plaque, ledit orifice étant susceptible de communiquer avec les deux chambres de la boîte à eau.According to the invention, the partition plate fits with play over its entire periphery in a circular groove and a diametrical groove formed respectively on the internal walls of the hemispherical bottom and of the tubular plate and the hemispherical bottom is crossed by at least a purge orifice opening at the lowest point of the circular groove for fitting the plate, said orifice being capable of communicating with the two chambers of the water box.

Ainsi, on ne cherche plus maintenant à solidariser le mieux possible la plaque de partition avec le fond et la plaque tubulaire. Au contraire, la plaque de partition est montée de façon à pouvoir se dilater librement sans gêner les déformations différentielles de la plaque tubulaire et du fond hémisphérique. On a constaté en effet qu'il était possible de conserver la fonction de la plaque de séparation de la botte à eau en deux chambres, en réduisant au minimum les by-pass, sans la fixer rigidement sur les parois de la botte à eau. De la sorte, les déformations de la boî. te à eau sont beaucoup plus faciles à prévoir , et on élimine toutes les difficultés inhérentes à la réalisation des soudures.Thus, we no longer seek now to secure as best as possible the partition plate with the bottom and the tubular plate. On the contrary, the partition plate is mounted so that it can expand freely without interfering with the differential deformations of the tubular plate and the hemispherical bottom. It has in fact been found that it is possible to keep the function of the separating plate of the water boot in two chambers, by reducing by-pass to a minimum, without rigidly fixing it to the walls of the water boot. In this way, the deformations of the box. are much easier to predict, and we eliminate all the difficulties inherent in making welds.

Mais en outre, en assurant une liaison avec jeu entre la plaque de partition et le fond hémisphérique, on facilite la purge de la boîte à eau. En effet, ledit jeu permet la communication des deux chambres de la botte à eau avec un orifice de purge unique placé au point le plus bas du fond hémisphérique. On élimine donc les orifices de purge qui étaient mé· nagés jusqu'à présent dans les deux tubulures de branchement des conduites d'arrivée et de sortie du fluide primaire et l'orifice unique selon l'invention peut-être réalisé beaucoup plus facilement.But in addition, by ensuring a link with play between the partition plate and the hemispherical bottom, it facilitates the purging of the water box. Indeed, said clearance allows the communication of the two chambers of the water boot with a single drain orifice placed at the lowest point of the hemispherical bottom. The bleed orifices which were previously mé · nages in the two connecting pipes of the inlet and outlet pipes of the primary fluid and the single orifice according to the invention can therefore be eliminated much more easily.

L'invention sera mieux comprise en se référant à un mode de réalisation particulier représenté sur les dessins annexés.

  • La figure 1 est une vue de la boîte à eau perfectionnée selon l'invention, coupée dans le plan de la plaque de partition.
  • La figure 2 est une vue en coupe selonll II, figure 1, la plaque de partition étant enlevée.
  • La figure 3 est une vue de face de la plaque de partition seule.
  • La figure 4 est ùne vue de détail, en coupe transversale, de la liaison de la plaque de partition avec la plaque tubulaire et le fond hémisphérique.
The invention will be better understood by referring to a particular embodiment shown in the accompanying drawings.
  • Figure 1 is a view of the improved water box according to the invention, cut in the plane of the partition plate.
  • Figure 2 is a sectional view along II II, Figure 1, the partition plate being removed.
  • Figure 3 is a front view of the partition plate alone.
  • Figure 4 is a detail view, in cross section, of the connection of the partition plate with the tube plate and the hemispherical bottom.

Sur les figures 1 et 2, on a représenté en coupe la botte à eau limitée à sa partie supérieure par la plaque tubulaire 1 et à sa partie inférieure par le fond hémisphérique 2. La plaque de partition qui a été enlevée sur la figure 2, partage la boîte à eau en deux chambres 21 et 22, respectivement d'admission et d'évacuation du fluide primaire. Celui-ci circule d'une chambre à l'autre dans des tubes en U non représentés dont les extrémités correspondent à des orifices 10.ménagés dans la plaque tubulaire.In FIGS. 1 and 2, the water boot is shown in section limited to its upper part by the tubular plate 1 and to its lower part by the hemispherical bottom 2. The partition plate which has been removed in FIG. 2, divides the water box into two chambers 21 and 22, respectively for admission and discharge of the primary fluid. This circulates from one chamber to another in U-tubes, not shown, the ends of which correspond to orifices 10. arranged in the tube plate.

Le fond hémisphérique est muni, pour chacune des chambres 21 et 22, d'une tubulure 23 sur laquelle se branche la conduite de circulation du fluide primaire et d'un trou d'homme 24 permettant d'accéder à l'intérieur de la chambre correspondante.The hemispherical bottom is provided, for each of the chambers 21 and 22, with a pipe 23 to which the primary fluid circulation pipe is connected and with a manhole 24 allowing access to the interior of the chamber corresponding.

Pour la commodité du dessin, on a représenté dans des positions arbitraires, sur la figure 2, la tubulure d'alimentation 23 débouchant dans la chambre 21 et un trou d'homme 24 débouchant dans la chambre 22.For the convenience of the drawing, there is shown in arbitrary positions, in FIG. 2, the supply tube 23 opening into the chamber 21 and a manhole 24 opening into the chamber 22.

La plaque de partition est représentée de face sur la figure 3. Elle a, de façon classique la forme d'un demi cercle,et comme on le voit sur la figure 4, elle est munie de préférence d'un amincissement sur toute sa périphérie. De la sorte, elle peut pénétrer avec jeu dans des raînures ménagées sur la plaque tubulaire 1 et sur le fond hémisphérique 2. Dans l'exemple représenté la ratnure supérieure 11 est constituée par un évidement pratiqué dans la face inférieure de la plaque tubulaire, et dans lequel s'engage le bord rectiligne supérieur 31 de la plaque de partition 3.The partition plate is represented from the front in FIG. 3. It has, in a conventional manner the shape of a semicircle, and as seen in FIG. 4, it is preferably provided with a thinning over all its periphery. In this way, it can penetrate with play in grooves made on the tube plate 1 and on the hemispherical bottom 2. In the example shown the upper groove 11 is constituted by a recess made in the underside of the tube plate, and in which engages the upper rectilinear edge 31 of the partition plate 3.

Pour éviter de pratiquer un évidement dans le fond hémisphérique, la rainure circulaire peut-être constituée de deux nervures parallèles 25 écartées l'une de l'autre d'une distance sensiblement égale à l'épaisseur de la plaque de partition 3 et soudées sur le fond hémisphérique 2. La plaque 3, pénètre avec jeu entre les deux nervures 25.To avoid making a recess in the hemispherical bottom, the circular groove may consist of two parallel ribs 25 spaced from each other by a distance substantially equal to the thickness of the partition plate 3 and welded to the hemispherical bottom 2. The plate 3 penetrates with play between the two ribs 25.

Pour qu'un jeu subsiste entre le bord inférieur 32 de la plaque de partition 3 et la paroi interne 20 du fond hémisphérique, on fait reposer la plaque de partition 3 directement sur les nervures 25, par l'intermédiaire, par exemple,de cales d'appui32.So that a clearance remains between the lower edge 32 of the partition plate 3 and the internal wall 20 of the hemispherical bottom, the partition plate 3 is made to rest directly on the ribs 25, for example by means of shims. support 32.

D'autre part, le fond hémisphérique 2 est traversé à son point le plus bas, par un orifice 26 qui débouche de la sorte au point le plus bas de la rainure circulaire, entre les deux nervures 25. Celles-ci sont munis de passages 27 qui permettent à l'orifice 26 de communiquer avec les deux chambres 21 et 22 de la boîte à eau.On the other hand, the hemispherical bottom 2 is crossed at its lowest point, by an orifice 26 which opens in this way at the lowest point of the circular groove, between the two ribs 25. These are provided with passages 27 which allow the orifice 26 to communicate with the two chambers 21 and 22 of the water box.

La disposition qui vient d'être décrite permet donc de combiner plusieurs avantages.The arrangement which has just been described therefore makes it possible to combine several advantages.

Tout d'abord, la plaque de partition 3 est indépendante des parois limitant la botte à eau. En effet, elle s'appuie simplement sur le fond hémisphérique 2 par les cales 32 et sa partie supérieure peut coulisser librement à l'intérieur de la rainure 11 de la plaque tubulaire 1. Ainsi on supprime toutes les déformations et contraintes résiduelles dues à la fixation par soudure de la plaque de partition dans les modes de réalisation classiques. Mais en outre, la plaque de partition n'intervient pas dans les déformations de la botte à eau qui peut être calculée et par conséquent contrôlée beaucoup plus facilement.First of all, the partition plate 3 is independent of the walls limiting the water boot. Indeed, it is simply supported on the hemispherical bottom 2 by the shims 32 and its upper part can slide freely inside the groove 11 of the tubular plate 1. Thus all the deformations and residual stresses due to the fixing by welding of the partition plate in the conventional embodiments. But in addition, the partition plate does not intervene in the deformations of the water boot which can be calculated and therefore controlled much more easily.

Cette solution permet également d'employer des matériaux moins coûteux, car les dilatabilités relatives des divers matériaux constituant les trois pièces de la boîte à eau n'interviennent plus dans les calculs de résistance.This solution also makes it possible to use less expensive materials, because the relative dilatabilities of the various materials constituting the three parts of the water box no longer intervene in the resistance calculations.

Mais en outre le jeu existant entre la partie inférieure de la plaque de partition 3 et la paroi interne du fond hémisphérique 2 permet de faire communiquer les deux chambres 21 et 22 avec un orifice unique de purge 26 qui permet d'évacuer la totalité de l'eau contenue dans les chambres 21 et 22 au-dessous du niveau inférieur des orifices de tubulures. On évite ainsi de pratiquer, dans l'épaisseur des tubulures,des canaux assez difficiles à percer,qui devaient en outre avoir une longueur assez importante pour déboucher au point le plus bas de la boîte à eau et pouvaient par conséquent être facilement obstrués par des dépôts. Dans le mode de réalisation selon l'invention, il est seulement nécessaire de ménager des canaux de purge 28 débouchant à la partie inférieure des trous d'honmies 24 pour évacuer l'eau contenue dans l'épaisseur de la paroi du fond 2.But in addition the play existing between the lower part of the partition plate 3 and the internal wall of the hemispherical bottom 2 makes it possible to make the two chambers 21 and 22 communicate with a single orifice of purge 26 which allows all the water contained in the chambers 21 and 22 to be evacuated below the lower level of the pipe orifices. This avoids practicing, in the thickness of the pipes, channels which are quite difficult to pierce, which must also have a length which is large enough to open out at the lowest point of the water box and could therefore be easily obstructed by deposits. In the embodiment according to the invention, it is only necessary to provide purge channels 28 opening at the bottom of the honia holes 24 in order to evacuate the water contained in the thickness of the bottom wall 2.

Enfin lors du montage de la boîte à eau, l'emboîtage de la plaque de partition facilite l'accostage du fond sur la plaque tubulaire.Finally during assembly of the water box, the fitting of the partition plate facilitates docking of the bottom on the tubular plate.

Ces différents avantages du mode de réalisation selon l'invention sont obtenus en admettant simplement un faible by-pass entre les deux chambres, qui est d'ailleurs très limité du fait de l'emboîtement de la plaque de partition dans les rainures. Celles-ci doivent cependant être interrompues à certains endroits et notamment à la partie supérieure du fond hémisphérique pour la soudure de celui-ci avec la plaque tubulaire. Des couvre- joints 33 comme celui qui a été représenté sur la partie droite de la figure 1 permettent de limiter sensiblement le passage entre les deux chambres.These various advantages of the embodiment according to the invention are obtained by simply admitting a low bypass between the two chambers, which is moreover very limited due to the nesting of the partition plate in the grooves. These must however be interrupted in certain places and in particular at the upper part of the hemispherical bottom for the welding thereof with the tube plate. Joint covers 33 like the one shown on the right-hand side of FIG. 1 make it possible to substantially limit the passage between the two chambers.

Bien entendu l'invention ne se limite pas aux détails du mode de réalisation qui vient d'être décrit, et qui pourraient être modifiés en employant notamment des moyens équivalents. C'est ainsi que les rainures dans lesquelles s'emboîte la plaque de partition pourraient être réalisées d'autre façon, de même que l'appui de la plaque de partition sur le fond hémisphérique.Of course, the invention is not limited to the details of the embodiment which has just been described, and which could be modified by employing in particular equivalent means. Thus the grooves in which the partition plate fits could be made in another way, as well as the support of the partition plate on the hemispherical bottom.

Claims (4)

1.- Boite à eau de générateur de vapeur comportant un faisceau de tubes en U dont les extrémités sont fixées sur une plaque tubulaire, la boîte à eau comprenant un fond sensiblement hémisphérique appliqué sur la plaque tubulaire et limitant un espace divisé en une chambre d'alimentation et une chambre d'évacuation par une plaque de partition en forme de demi-cercle, caractérisé par le fait que la plaque de partition (3) s'em- boite avec jeu sur toute sa périphérie dans une rainure circulaire et une rainure diamétrale (11) ménagées respectivement sur les parois internes du fond hémisphérique (2) et de la plaque tubulaire (1) et que le fond hémisphérique (2) est traversé par au moins un orifice de purge (26) débouchant au point le plus bas de la rainure circulaire d'emboîtement de la plaque (3), ledit orifice (26) étant susceptible de communiquer avec les deux chambres (21, 22) de la boite à eau.1.- Steam generator water box comprising a bundle of U-shaped tubes, the ends of which are fixed to a tubular plate, the water box comprising a substantially hemispherical bottom applied to the tubular plate and limiting a space divided into a chamber '' and a discharge chamber by a partition plate in the shape of a semicircle, characterized in that the partition plate (3) is interlocked over its entire periphery in a circular groove and a groove diametral (11) formed respectively on the internal walls of the hemispherical bottom (2) and of the tubular plate (1) and that the hemispherical bottom (2) is crossed by at least one purge orifice (26) opening at the lowest point of the circular groove for fitting the plate (3), said orifice (26) being capable of communicating with the two chambers (21, 22) of the water box. 2.- Boite à eau selon la revendication 1, caractérisée par le fait que la plaque de partition (3) repose sur le fond hémisphérique (2) par l'intermédiaire de cales (32) de maintien d'un jeu entre le bord inférieur (30) de la plaque (3)et le fond de la rainure circulaire, le bord supérieur (31) de la plaque pouvant coulisser librement dans la rainure (11) de la plaque tubulaire en fonction des déformations différentielles des pièces constituant la boite à eau.2.- water box according to claim 1, characterized in that the partition plate (3) rests on the hemispherical bottom (2) by means of shims (32) for maintaining a clearance between the lower edge (30) of the plate (3) and the bottom of the circular groove, the upper edge (31) of the plate being able to slide freely in the groove (11) of the tubular plate as a function of the differential deformations of the parts constituting the box. water. 3.- Boite à eau selon l'une des revendications 1 ou 2, caractérisée par le fait que la rainure d'emboitement de la plaque de partition (3) est ménagée dans l'épaisseurde la paroi correspondante de la boite à eau.3.- water box according to one of claims 1 or 2, characterized in that the groove for fitting the partition plate (3) is formed in the thickness of the corresponding wall of the water box. 4.- Boite à eau selon la revendication 2, caractérisée par le fait que la rainure circulaire est délimitée par deux nervures (25) parallèles ménagées sur la face interne du fond hémisphérique (2) et à la partie inférieure desquelles sont ménagés des passages (27) communiquant avec l'orifice de purge (26) du fond hémisphérique (2).4.- water box according to claim 2, characterized in that the circular groove is delimited by two parallel ribs (25) formed on the internal face of the hemispherical bottom (2) and at the lower part of which are formed passages ( 27) communicating with the bleed orifice (26) of the hemispherical bottom (2).
EP80401440A 1979-10-08 1980-10-08 Steam generator water chambers Expired EP0027094B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7924986A FR2467355A1 (en) 1979-10-08 1979-10-08 IMPROVEMENTS TO THE PRODUCTION OF STEAM GENERATOR WATER BOXES
FR7924986 1979-10-08

Publications (2)

Publication Number Publication Date
EP0027094A1 true EP0027094A1 (en) 1981-04-15
EP0027094B1 EP0027094B1 (en) 1982-04-07

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ID=9230438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401440A Expired EP0027094B1 (en) 1979-10-08 1980-10-08 Steam generator water chambers

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US (1) US4422499A (en)
EP (1) EP0027094B1 (en)
DE (1) DE3060284D1 (en)
FR (1) FR2467355A1 (en)

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FR2603373A1 (en) * 1986-09-02 1988-03-04 Valeo Separation piece for heat exchanger header tank - has integral brace and housing for peripheral seal
EP0779491A1 (en) * 1995-12-14 1997-06-18 Sanden Corporation Heat exchanger with a header box provided with a partition wall, and method of manufacturing the same
CN104806997A (en) * 2015-05-25 2015-07-29 侯如升 Steam boiler barrel exhaust pipe

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US5623763A (en) * 1995-08-01 1997-04-29 The Babcock & Wilcox Company Method of replacing primary divider plate in a steam generator
FR2858683B1 (en) * 2003-08-07 2005-11-04 Framatome Anp HEAT EXCHANGER, ESPECIALLY A CONVEX-BASED VAPOR GENERATOR
KR100999961B1 (en) 2008-11-14 2010-12-09 주식회사 두원공조 header of heat exchanger combined with tube of double row
US9857127B2 (en) 2011-12-06 2018-01-02 Saudi Arabian Oil Company Header for air cooled heat exchanger
JP5840049B2 (en) * 2012-03-27 2016-01-06 三菱重工業株式会社 Steam generator manufacturing method
US20170356674A1 (en) * 2016-06-13 2017-12-14 Laars Heating Systems Company Water management header for a boiler or water heater
CN110917643A (en) * 2018-09-20 2020-03-27 深圳市引擎门科技有限公司 Rapid evaporation device
JP2020153588A (en) * 2019-03-20 2020-09-24 三菱重工マリンマシナリ株式会社 Tube type heat exchanger and boiler
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FR2603373A1 (en) * 1986-09-02 1988-03-04 Valeo Separation piece for heat exchanger header tank - has integral brace and housing for peripheral seal
EP0779491A1 (en) * 1995-12-14 1997-06-18 Sanden Corporation Heat exchanger with a header box provided with a partition wall, and method of manufacturing the same
US5894886A (en) * 1995-12-14 1999-04-20 Sanden Corp Heat exchanger with fluid control means for controlling a flow of a heat exchange medium and method of manufacturing the same
CN104806997A (en) * 2015-05-25 2015-07-29 侯如升 Steam boiler barrel exhaust pipe

Also Published As

Publication number Publication date
FR2467355B1 (en) 1981-10-16
DE3060284D1 (en) 1982-05-19
US4422499A (en) 1983-12-27
FR2467355A1 (en) 1981-04-17
EP0027094B1 (en) 1982-04-07

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