EP0549448A1 - Device for supporting an overhanging mass connected to a displaceable element on a stationary frame - Google Patents

Device for supporting an overhanging mass connected to a displaceable element on a stationary frame Download PDF

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Publication number
EP0549448A1
EP0549448A1 EP92403496A EP92403496A EP0549448A1 EP 0549448 A1 EP0549448 A1 EP 0549448A1 EP 92403496 A EP92403496 A EP 92403496A EP 92403496 A EP92403496 A EP 92403496A EP 0549448 A1 EP0549448 A1 EP 0549448A1
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EP
European Patent Office
Prior art keywords
frame
points
arms
mass
supporting
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Granted
Application number
EP92403496A
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German (de)
French (fr)
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EP0549448B1 (en
Inventor
Jean-Jacques Marsault
Michel Barbotte
Jean-Pierre Baudel
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Stein Industrie SA
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Stein Industrie SA
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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
    • F22B37/24—Supporting, suspending, or setting arrangements, e.g. heat shielding
    • 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
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
    • F22B37/207—Supporting arrangements for drums and collectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S248/00—Supports
    • Y10S248/901—Support having temperature or pressure responsive feature

Definitions

  • the present invention relates to a support device on a fixed frame of a mass connected in overhang to a movable element under the effect of thermal expansions or contractions.
  • Devices of this kind are used in particular in boilers or steam generators, in which frequently appears the problem of the suspension of masses such as collectors on the walls of combustion chambers whose water circulation tubes to be vaporized undergo. significant expansions and contractions depending on the temperature of the fluid flowing there. These collectors are placed in overhang relative to the wall formed by the tubes, and must imperatively follow the movements of this wall without transmitting to it forces liable to deform it.
  • a support device comprising on the one hand an articulated planar support on which the cantilevered mass is placed and on the other hand a system of three arms articulated connecting the fixed frame with the movable element and the flat support.
  • the various components of the device are not subjected to bending stresses but only to tensile or compression stresses.
  • the present invention aims to provide a rigid support device for such masses cantilever, simpler and whose movements follow more rigorously the movements of the movable element vertically.
  • the device according to the invention is characterized in that it comprises a rigid frame supporting the mass, connected by two parallel and equal arms situated at two different heights to the fixed frame, the two arms being articulated at one of their ends at two points on the frame and at the other end in two points of the fixed frame, the rigid support being placed on the movable element by means of a horizontally sliding connection.
  • This device may further include in each of its variants a mass support exerting on the frame a constant upward traction force.
  • the vapor collector 1 is fixed relative to a partition 2, formed of tubes 2a and connecting fins 2b, of a boiler combustion chamber, so that its connecting tubes 3 with the tubes of a superheater 4 are not subjected to stresses due to vertical differential movements between the manifold and the partition.
  • the collector is fixed on a frame 5 hooked to pivot and slide at point A on the partition 2.
  • Two additional support points of the frame are formed by the joints B and C;
  • Points E and D as well as B and C are respectively located on the same verticals, points B and E being substantially at the same height as well as points C and D.
  • the collector 1 preferably is mounted sliding horizontally on the support 5.
  • FIG. 2 represents a support device where the arms 6 and 7 are inclined relative to the horizontal by an angle ⁇ , so that the horizontal displacement of the points B and C subject to describe circles of respective radii EB and DC is clearly more important than in the embodiment of FIG. 1. It is thus possible by choosing the angle ⁇ to obtain a horizontal displacement of the points B and C which is close to the horizontal displacement of the wall 2.
  • the frame 1 is fixed to a constant support element with springs 9, which makes it possible to size the arm system only to support a fraction of the total load, and therefore to reduce the vertical load transmitted to the partition 2 formed by the spray tubes.
  • the articulation arms are not subjected to any bending stress, but only to tensile or compression stresses, which makes it possible to give them cross sections significantly less than those of arms of known devices, working in flexion.
  • the invention applies in particular to the suspension of a manifold on the wall of the combustion chamber of a boiler or of a steam generator but could also be applied to the suspension of other devices, such as burners.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supports For Pipes And Cables (AREA)
  • Ladders (AREA)
  • Movable Scaffolding (AREA)
  • Manipulator (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Particle Accelerators (AREA)
  • Vibration Prevention Devices (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Electric Vacuum Cleaner (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

Device for supporting an overhanging mass (1) connected to a displaceable element (2) on a stationary frame (8) under the effect of thermal expansions or contractions. It comprises a rigid structure (5) supporting the mass (1) connected, by two parallel and equal arms (6, 7) situated at two different heights, to the stationary frame (8), the two arms (6, 7) being articulated at one of their ends at two points (B, C) of the structure (5) and at the other end at two points (D, E) of the stationary frame (8), the rigid support (5) being placed on the displaceable element (2) by means of a connection which slides horizontally (A). Application to collectors of boilers or steam generators. <IMAGE>

Description

La présente invention concerne un dispositif d appui sur une charpente fixe d'une masse reliée en porte-à-faux à un élément mobile sous l'effet de dilatations ou contractions thermiques.The present invention relates to a support device on a fixed frame of a mass connected in overhang to a movable element under the effect of thermal expansions or contractions.

Les dispositifs de ce genre sont utilisés en particulier dans les chaudières ou générateurs de vapeur, dans lesquels apparaît fréquemment le problème de la suspension de masses telles que des collecteurs sur les parois de chambres de combustion dont les tubes de circulation d'eau à vaporiser subissent des dilatations et contractions importantes en fonction de la température du fluide qui y circule. Ces collecteurs sont placés en porte-à-faux par rapport à la paroi formée par les tubes, et doivent impérativement suivre les déplacements de cette paroi sans lui transmettre d'efforts suceptibles de la déformer.Devices of this kind are used in particular in boilers or steam generators, in which frequently appears the problem of the suspension of masses such as collectors on the walls of combustion chambers whose water circulation tubes to be vaporized undergo. significant expansions and contractions depending on the temperature of the fluid flowing there. These collectors are placed in overhang relative to the wall formed by the tubes, and must imperatively follow the movements of this wall without transmitting to it forces liable to deform it.

On a déjà proposé de suspendre de tels collecteurs à des supports à ressort, chargés de reprendre une partie du poids de la masse en porte-à-faux, tout en étant susceptibles de suivre les déplacements de la masse sans variation trop importante de l'effort qu'ils subissent. Mais de tels ressorts n'agissent que comme des contrepoids, et ne contrôlent la position verticale de la masse qu'au prix d'efforts parasites sur les parois de la chambre de combustion, d autant plus importantes que l'effort à reprendre par ces ressorts n'est pas constant, puisqu'il dépend des efforts de grandeur variable. appliqués par les tuyauteries de liaison sur les collecteurs. Par ailleurs, les collecteurs ne restent pas complètement en point fixe par rapport à la paroi de la chambre de combustion.It has already been proposed to suspend such collectors from spring supports, responsible for taking up part of the weight of the mass in overhang, while being capable of following the movements of the mass without too great a variation in the effort they undergo. But such springs act only as counterweights, and control the vertical position of the mass only at the cost of parasitic forces on the walls of the combustion chamber, all the more important than the force to be taken up by these springs is not constant, since it depends on the efforts of variable size. applied by the connecting pipes on the manifolds. Furthermore, the manifolds do not remain completely at a fixed point relative to the wall of the combustion chamber.

On a aussi proposé de supporter de tels collecteurs par des tubes porteurs verticaux parcourus par un fluide qui leur imprime une dilatation thermique égale à celle de la paroi du générateur de vapeur. Les collecteurs sont bien alors en point fixe par rapport à la paroi de la chambre de combustion. De tels dispositifs sont cependant complexes et coûteux, et leur fonctionnement peut être perturbé du fait, soit d un retard des dilatations thermiques des tubes porteurs verticaux par rapport à celle de la paroi de la chambre de combustion, soit d'une circulation imparfaite du fluide dans les tubes porteurs. Il n'y a plus dès lors égalité des dilatations thermiques des tubes porteurs verticaux et de la paroi de la chambre de combustion, et il peut donc apparaître sur cette dernière des contraintes inacceptables.It has also been proposed to support such collectors by vertical carrier tubes traversed by a fluid which imparts to them a thermal expansion equal to that of the wall of the steam generator. The collectors are then well at a fixed point relative to the wall of the combustion chamber. However, such devices are complex and expensive, and their operation can be disturbed due to either a delay in the thermal expansions of the vertical carrier tubes with respect to that of the wall of the combustion chamber, or an imperfect circulation of the fluid in the carrier tubes. There is therefore no longer any thermal expansion of the vertical support tubes and of the wall of the combustion chamber, and there may therefore appear unacceptable stresses on the latter.

On a également proposé dans le document FR-A-2269023 de faire reprendre le poids en porte-à-faux de collecteurs ou de brûleurs de chambres de combustion par des systèmes à leviers, dont les pivots, solidaires d une charpente fixe, sont disposés de façon que les déplacements du point de support du collecteur ou du brûleur soient égaux aux déplacements du point d'accrochage sur la paroi de la chambre de combustion. Mais les leviers de ces systèmes sont sollicités à la flexion, et le cumul de leurs déformations de flexion nuit à la rigidité de l'ensemble, à moins de leur donner des dimensions excessives.It has also been proposed in document FR-A-2269023 to recover the weight overhang of manifolds or burners of combustion chambers by lever systems, the pivots of which, integral with a fixed frame, are arranged so that the displacements of the collector or burner support point are equal to the displacements of the attachment point on the wall of the combustion chamber. However, the levers of these systems are subjected to bending, and the accumulation of their bending deformations harms the rigidity of the assembly, unless they are given excessive dimensions.

Enfin dans le document FR-A-2 640 356 on a proposé un dispositif d'appui comportant d'une part un support plan articulé sur lequel est posée la masse en porte-à-faux et d'autre part un système de trois bras articulés reliant la charpente fixe avec l'élément mobile et le support plan.Finally, in document FR-A-2 640 356, a support device has been proposed comprising on the one hand an articulated planar support on which the cantilevered mass is placed and on the other hand a system of three arms articulated connecting the fixed frame with the movable element and the flat support.

Les divers constituants du dispositif ne sont pas soumis à des contraintes de flexion mais uniquement à des contraintes de traction ou de compression.The various components of the device are not subjected to bending stresses but only to tensile or compression stresses.

Toutefois ce dispositif est relativement compliqué puiqu'il nécessite trois bras articulés.However, this device is relatively complicated since it requires three articulated arms.

La présente invention a pour but de procurer un dispositif d'appui rigide pour de telles masses en porte-à-faux, plus simple et dont les déplacements suivent plus rigoureusement les déplacements de l'élément mobile verticalement.The present invention aims to provide a rigid support device for such masses cantilever, simpler and whose movements follow more rigorously the movements of the movable element vertically.

Le dispositif selon l'invention est caractérisé en ce qu'il comporte un bâti rigide supportant la masse, relié par deux bras parallèles et égaux situés à deux hauteurs différentes à la charpente fixe, les deux bras étant articulés à l'une de leurs extrémités en deux points du bâti et à l'autre extrémité en deux points de la charpente fixe,le support rigide étant posé sur l'élément mobile par l'intermédiaire d'une liaison glissante horizontalement.The device according to the invention is characterized in that it comprises a rigid frame supporting the mass, connected by two parallel and equal arms situated at two different heights to the fixed frame, the two arms being articulated at one of their ends at two points on the frame and at the other end in two points of the fixed frame, the rigid support being placed on the movable element by means of a horizontally sliding connection.

Il répond en outre de préférence à l'une ou l'autre des caractéristiques suivantes :

  • la masse à supporter est posée glissante sur le bâti rigide.
  • les points d'articulation des bras articulés sur la charpente fixe ne sont pas situés à la même hauteur que les points des mêmes bras sur le bâti rigide.
It also preferably meets one or other of the following characteristics:
  • the mass to be supported is slidably placed on the rigid frame.
  • the articulation points of the articulated arms on the fixed frame are not located at the same height as the points of the same arms on the rigid frame.

Ce dispositif peut comporter en outre dans chacune des ses variantes un support de la masse exerçant sur le bâti un effort de traction vers le haut constant.This device may further include in each of its variants a mass support exerting on the frame a constant upward traction force.

Il est décrit ci-après, à titre d'exemples et en référence aux figures du dessin annexé, des dispositifs selon l'invention d'appui sur une charpente fixe d'un collecteur de vapeur relié en porte-à-faux à l'écran formé par les tuyauteries de circulation d'eau à vaporiser le long des parois d'une chambre de combustion d'une chaudière ou générateur de vapeur.

  • la figure 1 représente schématiquement en élévation un dispositif selon une première variante, dans lequel les deux bras restent sensiblement horizontaux.
  • la figure 2 représente en élévation un dispositif selon une deuxième variante, dans lequel les deux bras font un angle notable avec l'horizontale et qui comporte en outre un support constant.
It is described below, by way of examples and with reference to the figures of the appended drawing, devices according to the invention bearing on a fixed frame of a vapor collector connected in cantilever to the screen formed by the water circulation pipes to be vaporized along the walls of a combustion chamber of a boiler or steam generator.
  • Figure 1 shows schematically in elevation a device according to a first variant, in which the two arms remain substantially horizontal.
  • Figure 2 shows in elevation a device according to a second variant, in which the two arms make a significant angle with the horizontal and which further comprises a constant support.

Dans la figure 1, le collecteur de vapeur 1 est fixé par rapport à une cloison 2, formée de tubes 2a et d'ailettes de jonction 2b, d'une chambre de combustion de chaudière, de façon que ses tubes de liaison 3 avec les tubes d'un surchauffeur 4 ne soient pas soumis à des contraintes dues à des déplacements différentiels verticaux entre le collecteur et la cloison.In FIG. 1, the vapor collector 1 is fixed relative to a partition 2, formed of tubes 2a and connecting fins 2b, of a boiler combustion chamber, so that its connecting tubes 3 with the tubes of a superheater 4 are not subjected to stresses due to vertical differential movements between the manifold and the partition.

Le collecteur est fixé sur un bâti 5 accroché à pivotement et glissement au point A à la cloison 2. Deux points d'appui supplémentaires du bâti sont constitués par les articulations B et C;The collector is fixed on a frame 5 hooked to pivot and slide at point A on the partition 2. Two additional support points of the frame are formed by the joints B and C;

Ces points B et C sont reliés par deux bras 6, et 7 parallèles et égaux situés à des hauteurs différentes à deux points d'articulation D et E situés sur une charpente fixe 8.These points B and C are connected by two arms 6, and 7 parallel and equals located at different heights at two points of articulation D and E located on a fixed frame 8.

Les points E et D ainsi que B et C sont respectivement situés sur des mêmes verticales, les points B et E étant sensiblement à la même hauteur ainsi que les points C et D.Points E and D as well as B and C are respectively located on the same verticals, points B and E being substantially at the same height as well as points C and D.

Si la paroi 2 vient à se dilater du fait de son échauffement le point A vient en A', le point B en B' et le point C en C'. Le quadrilatère BCDE étant un parallèlogramme, le segment B'C' est resté parallèle à BC de sorte que le bâti 5 est descendu parallèlement à lui-même de la distance imposée par le déplacement de A en A'.If the wall 2 comes to expand due to its heating, the point A comes at A ', the point B at B' and the point C at C '. The quadrilateral BCDE being a parallelogram, the segment B'C 'remained parallel to BC so that the frame 5 descended parallel to itself by the distance imposed by the displacement from A to A'.

Le collecteur 1 de préférence est monté glissant horizontalement sur le support 5.The collector 1 preferably is mounted sliding horizontally on the support 5.

La figure 2 représente un dispositif d'appui où les bras 6 et 7 sont inclinés par rapport à l'horizontale d'un angle α , de sorte que le déplacement horizontal des point B et C assujettis à décrire des cercles de rayons respectifs EB et DC est nettement plus important que dans la réalisation de la figure 1. On peut ainsi en choisissant l'angle α obtenir un déplacement horizontal des points B et C qui soit voisin du déplacement horizontal de la paroi 2.FIG. 2 represents a support device where the arms 6 and 7 are inclined relative to the horizontal by an angle α, so that the horizontal displacement of the points B and C subject to describe circles of respective radii EB and DC is clearly more important than in the embodiment of FIG. 1. It is thus possible by choosing the angle α to obtain a horizontal displacement of the points B and C which is close to the horizontal displacement of the wall 2.

Ceci permet de limiter le glissement entre le bâti 5 et la paroi 2 au niveau de l'attache A.This limits the slip between the frame 5 and the wall 2 at the clip A.

Par ailleurs, le bâti 1 est fixé à un élément de supportage constant à ressorts 9, ce qui permet de ne dimensionner le système de bras que pour supporter une fraction de la charge totale, et de réduire donc la charge verticale transmise à la cloison 2 formée par les tubes de vaporisation.Furthermore, the frame 1 is fixed to a constant support element with springs 9, which makes it possible to size the arm system only to support a fraction of the total load, and therefore to reduce the vertical load transmitted to the partition 2 formed by the spray tubes.

On observera que dans toutes les variantes ci-dessus, les bras d'articulation ne sont soumis à aucune contrainte de flexion, mais uniquement à des contraintes de traction ou de compression, ce qui permet de leur donner des sections droites notablement inférieures à celles des bras des dispositifs connus, travaillant en flexion.It will be observed that in all of the above variants, the articulation arms are not subjected to any bending stress, but only to tensile or compression stresses, which makes it possible to give them cross sections significantly less than those of arms of known devices, working in flexion.

L'invention s'applique notamment à la suspension d'un collecteur sur la paroi de la chambre de combustion d'une chaudière ou d'un générateur de vapeur mais pourrait aussi s'appliquer à la suspension d'autres appareils, tels que des brûleurs.The invention applies in particular to the suspension of a manifold on the wall of the combustion chamber of a boiler or of a steam generator but could also be applied to the suspension of other devices, such as burners.

Claims (4)

1 - Dispositif d'appui sur une charpente fixe d'une masse (1) reliée en porte-à-faux à un élément mobile (2), caractérisé en ce qu'il comporte un bâti rigide (5) supportant la masse (1) relié, par deux bras (6, 7) parallèles et égaux situés à deux hauteurs différentes à la charpente fixe (8), les deux bras (6, 7) étant articulés à l'une de leurs extrémités en deux points (B, C) du bâti (5) et à l'autre extrémité en deux points (D, E) de la charpente fixe (8),le support rigide (5) étant posé sur l'élément mobile (2) par l'intermédiaire d'une liaison glissante horizontalement (A). 1 - Support device on a fixed frame of a mass (1) connected in cantilever to a mobile element (2), characterized in that it comprises a rigid frame (5) supporting the mass (1 ) connected by two parallel and equal arms (6, 7) located at two different heights to the fixed frame (8), the two arms (6, 7) being articulated at one of their ends at two points (B, C) of the frame (5) and at the other end at two points (D, E) of the fixed frame (8), the rigid support (5) being placed on the movable element (2) via d 'a horizontally sliding link (A). 2 - Dispositif d'appui selon la revendication 1, caractérisé en ce la masse (1) est posée glissante sur le bâti rigide (5). 2 - Support device according to claim 1, characterized in that the mass (1) is placed sliding on the rigid frame (5). 3 - Dispositif d'appui selon l'une des revendications 1 ou 2, caractérisé en ce que les deux bras parallèles (6, 7) sont inclinés d'un angle tel que le déplacement horizontal de leurs points d'articulation (B, C) sur le bâti (5) soit voisin du déplacement horizontal de l'élément mobile (2). 3 - Support device according to one of claims 1 or 2, characterized in that the two parallel arms (6, 7) are inclined at an angle such that the horizontal displacement of their points of articulation (B, C ) on the frame (5) is close to the horizontal displacement of the movable element (2). 4 - Dispositif d'appui selon l'une des revendications précédentes, caractérisé en ce qu'il comporte un support à ressorts (9) exerçant sur le bâti (5) un effort de traction vers le haut. 4 - Support device according to one of the preceding claims, characterized in that it comprises a spring support (9) exerting on the frame (5) a tensile force upwards.
EP92403496A 1991-12-23 1992-12-21 Device for supporting an overhanging mass connected to a displaceable element on a stationary frame Expired - Lifetime EP0549448B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9116027A FR2685437B1 (en) 1991-12-23 1991-12-23 DEVICE FOR SUPPORTING A FIXED FRAMEWORK OF A MASS CONNECTED OVERTIGHT TO A MOBILE ELEMENT.
FR9116027 1991-12-23

Publications (2)

Publication Number Publication Date
EP0549448A1 true EP0549448A1 (en) 1993-06-30
EP0549448B1 EP0549448B1 (en) 1995-08-02

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EP92403496A Expired - Lifetime EP0549448B1 (en) 1991-12-23 1992-12-21 Device for supporting an overhanging mass connected to a displaceable element on a stationary frame

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US (1) US5342016A (en)
EP (1) EP0549448B1 (en)
AT (1) ATE125928T1 (en)
DE (1) DE69203844T2 (en)
ES (1) ES2075662T3 (en)
FR (1) FR2685437B1 (en)
GR (1) GR3017621T3 (en)

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FR2640356A1 (en) * 1988-12-08 1990-06-15 Stein Industrie APPARATUS FOR SUPPORTING A FIXED FRAMEWORK OF A MASSAGE ATTACHED TO A VERTICALLY MOBILE MEMBER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106426276A (en) * 2015-08-12 2017-02-22 佛山市禾才科技服务有限公司 Double-triangular composite mechanical arm

Also Published As

Publication number Publication date
DE69203844D1 (en) 1995-09-07
GR3017621T3 (en) 1996-01-31
FR2685437B1 (en) 1994-01-28
DE69203844T2 (en) 1996-01-11
FR2685437A1 (en) 1993-06-25
ES2075662T3 (en) 1995-10-01
ATE125928T1 (en) 1995-08-15
US5342016A (en) 1994-08-30
EP0549448B1 (en) 1995-08-02

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