EP0654636B1 - Device for antivibrationally securing tubes of a heat exchanger and use thereof - Google Patents

Device for antivibrationally securing tubes of a heat exchanger and use thereof Download PDF

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Publication number
EP0654636B1
EP0654636B1 EP94402249A EP94402249A EP0654636B1 EP 0654636 B1 EP0654636 B1 EP 0654636B1 EP 94402249 A EP94402249 A EP 94402249A EP 94402249 A EP94402249 A EP 94402249A EP 0654636 B1 EP0654636 B1 EP 0654636B1
Authority
EP
European Patent Office
Prior art keywords
spacer
bars
antivibration
tubes
vibration
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.)
Expired - Lifetime
Application number
EP94402249A
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German (de)
French (fr)
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EP0654636A1 (en
Inventor
Gérard Boula
Christian Valadon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Areva NP SAS
Original Assignee
Framatome SA
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Filing date
Publication date
Application filed by Framatome SA filed Critical Framatome SA
Publication of EP0654636A1 publication Critical patent/EP0654636A1/en
Application granted granted Critical
Publication of EP0654636B1 publication Critical patent/EP0654636B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
    • 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
    • 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
    • F22B37/205—Supporting and spacing arrangements for tubes of a tube bundle
    • F22B37/206—Anti-vibration supports for the bends of U-tube steam generators
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0132—Auxiliary supports for elements for tubes or tube-assemblies formed by slats, tie-rods, articulated or expandable rods

Definitions

  • the invention relates to a wedging device antivibration of tubes of a heat exchanger such than a steam generator.
  • the circulation of the fluid in contact with the tubes can cause vibrations which are likely to cause damage to these tubes if they are not maintained effectively.
  • the right side of the tubes is engaged in spacers located at regular distances from each other others depending on the height of the beam. These parts straight lines are therefore effectively maintained by rigid elements.
  • the curved parts of the bundle tubes constituting the bun should also be maintained and we generally use spacer bars for this which are each inserted between two layers of adjacent tubes of the bundle and arranged in substantially radial directions of the bun. These spacer bars are generally linked two by two from hinged way at one of their ends arranged at inside the bun and placed angularly to form V-shaped structures
  • the outer ends of the anti-vibration bars opposite their central part are protruding by relation to the tubes constituting the outer layer of the bun and are interconnected by connecting means ensuring the maintenance of anti-vibration bars.
  • the fixing of the bars antivibration requires complex operations putting most often using welds which must be carried out in the vicinity of the beam tubes which risk thus to undergo certain deteriorations.
  • the materials making up the anti-vibration bars must be chosen to allow their welding and possibly their treatment after welding, in good conditions metallurgical.
  • a device has been proposed wedging comprising connecting means between the outer ends of anti-vibration bars arranged following sets of at least two bars in which bars are aligned and have openings through aligned one of which is tapped. Ways of the anti-vibration bars have a pin which is inserted into the aligned openings of the set of anti-vibration bars and in the bore spacers which are each inserted between two successive anti-vibration bars.
  • the brooch which has a threaded end is screwed into the threaded opening an anti-vibration bar located at the end of the row.
  • the spindle is also secured to an element of rotation lock which can be welded on a spacer.
  • Such a device has advantages over mechanical devices known previously but requires the use of pins whose length is adapted to the number of bars and the length of the row anti-vibration bars whose ends are assembled between them. In some cases it is necessary use a very long spindle, which can have drawbacks with regard to the conditions the mechanical resistance of the spindle.
  • the object of the invention is therefore to propose a anti-vibration wedging device for exchanger tubes of heat comprising a bundle of tubes bent in U, fixed at their ends in a tubular plate, arranged in parallel layers and the parts of which curved opposite the tube plate and juxtaposed constitute a set of substantially hemispherical shape called a bun, the wedging device comprising a set of antivibration bars inserted each between the curved parts of two adjacent layers of bundle tubes and arranged in a direction substantially radial of the bun, so as to present a end outside of the bun and means of connection between the outer end parts of the anti-vibration bars arranged in a plurality sets of at least two bars in which the bars are aligned in a straight row and have aligned through openings, this wedging device using elements modular that can be easily adapted to a number any of bars and a row of bars of a any length.
  • Figure 1 is an elevational sectional view partial by a vertical plane of a steam generator of a pressurized water nuclear reactor.
  • FIG. 2A is a partial view from above and in section along 2-2 of Figure 1, of an upper part the bun of a steam generator having a array of square pitch tubes and a wedging device anti-vibration according to the invention.
  • FIG. 2B is a view similar to the view of the FIG. 2A, in the case of a steam generator having a bundle of triangular pitch tubes.
  • Figure 3 is a sectional view through a plane perpendicular to the bundle of tube plies, one anti-vibration bar connection device according to a first embodiment.
  • Figure 4 is a sectional view along 4-4 of Figure 3.
  • Figure 5 is a top view along 5 of Figure 4.
  • Figure 6 is a top view and in section partial of a connecting means of a set of bars antivibration of a wedging device according to the invention and according to a second embodiment.
  • Figure 7 is a top view of means of connection of anti-vibration bars of a calibration according to the invention and according to a variant of the first embodiment.
  • Figure 8 is a top view of part a wedging device according to the invention comprising a bracket for holding the bundle tubes.
  • Figure 9 is an enlarged view of a detail of realization of the fixing of the stirrup of support shown in Figure 8.
  • Envelope 2 contains the tube bundle of the steam generator made up of 5 tubes bent in U and comprising at their upper part semicircular hangers 5b constituting the bun of the generator steam.
  • the straight parts 5a of the bundle tubes are crimped at their ends in the tube plate 3, so as to lead into a water box 7 in two parts separated by a partition 8.
  • the tubular plate 3 is crossed by a regular network of holes in each of which is fixed one end of a bundle tube.
  • the regular network of holes crossing the tubular plate 3 may for example be square mesh or triangular mesh.
  • FIGS. 2A and 2B show a part of a wedging device according to the invention, in the case of a bundle of tubes fixed in holes of a square mesh network crossing the tube plate and in the case of a bundle of tubes held in holes forming a triangular mesh network crossing the tube plate 3, respectively.
  • Reactor cooling water pressure nuclear enters one part of the box 7 through an inlet pipe 6a, circulates in the bundle tubes then exit through an outlet tube 6b.
  • the bundle of tubes 5 is surrounded by an envelope of beam 9 making it possible to channel the supply water entering the envelope of the steam generator through a inlet manifold 11.
  • Generator supply water steam first flows up and down in space annular 4 located around the envelope of the bundle 9, then from bottom to top in contact with the tubes 5 of the bundle, so as to heat up then vaporize and come out in the form of vapor through the upper tube 12 of the steam generator.
  • the upper part of the tube bundle called bun is formed by the juxtaposition of hangers of semi-circular shape arranged in successive layers in which the radii of the hangers 5b are decreasing from the outside to the inside of the beam.
  • the different successive layers of bundle tubes parallel to the central layer shown in Figure 1 have exterior hangers decreasing in diameter towards the outside, so that the upper part of the bundle or bun constitutes a substantially hemispherical in shape.
  • the straight part 5a of the tubes 5 is maintained by spacer plates 10 which prevent the setting in tube vibrations when the steam generator is in service due to the circulation of fluids exchange.
  • anti-vibration bars 15 formed as a V articulated or not at their inner ends 15a and introduced between successive layers of tubes at level of hangers.
  • the outer ends 15b of the branches of the antivibration bars are protruding compared to the upper surface of the bun and allow the fixing the anti-vibration bars.
  • FIGS. 2A and 2B there is shown in a top view with section of the plies of tubes in their upper part, part of a shimming assembly according to the invention, in the case of a bundle of tubes maintained in a square mesh network layout and in the case of a bundle of tubes held in a layout with triangular mesh network, respectively.
  • the bundle tubes are held in a regular network layout through the openings in the tube plate 3 and through the through openings of the spacer plates 10 which have networks of openings analogues.
  • the arrangement of the tubes in the case of a network triangular mesh results in particular in a lower space between successive layers of tubes than in the case of a square mesh network.
  • the establishment of means of connection between the ends of the anti-vibration bars inserted between the plies of tubes is therefore more difficult, in the case of a triangular mesh network, because of the more low spacing between the layers and therefore between the anti-vibration bars slid between the layers of tubes.
  • the device according to the invention is particularly well suited to the case of a network of tight mesh tubes triangular but it can of course be applied to case of a square mesh network.
  • FIGS. 2A and 2B the corresponding elements bear the same references with the sign ' (prime) in the case of the elements in FIG. 2B relating to a triangular mesh network.
  • the tubes 14 or 14 'of the network of tubes constituting the layers external parts of the steam generator bun are shown in FIGS. 2A and 2B.
  • the tubes 14 or 14 ' constitute successive layers parallels 13 or 13 'between which are inserted 15 or 15 'anti-vibration bars.
  • the layers of tubes consist of the curved upper parts of the juxtaposed tubes with decreasing radii from the outside towards the inside of the bun.
  • the antivibration bars 15 include projecting ends 15b on the outside of the bun and arranged in alignment with each other to constitute variable length rows.
  • the protruding ends 15b of the anti-vibration bars are interconnected by means of bond such as 16, 17, 18 and 19 respectively allowing liaise two, three, five or one greater number of anti-vibration bars constituting a set of aligned bars.
  • the connecting devices such as 16, 17, 18 and 19 can be made from identical modular elements which will be described by the after.
  • the end portions of the bars anti-vibration 15 'inserted between the plies of tubes arranged in a triangular mesh network as shown in Figure 2B can be connected by through connecting means such as 16 ', 17', 18 'and 19' to connect the ends together a set of two, four, five or more than five bars antivibration, respectively.
  • connection device such as 16, 17, 18 and 19 or 16 ', 17 ', 18' and 19 'are crossed by aligned openings along an axis perpendicular to the ends of the anti-vibration bars.
  • Such a device which will be designated in its together by the mark 20 in Figures 3 to 5 is similar to device 16 or 16 'shown in Figures 2A and 2B, respectively.
  • the device 20 which ensures the connection between the end portions 25b and 25'b of two bars anti-vibration 25 and 25 'arranged in two successive spaces between rows of tubes 24 comprises a screw 21, a spacer 22 and a nut 23.
  • the screw 21 has a head 21a secured to a threaded rod 21b.
  • Spacer 22 has a threaded opening 22a and a threaded rod 22b arranged along the axis of the spacer, the rod 22b projecting from the end of the spacer 22 opposite its end on which opens the tapped opening 22a which is produced in the form of a blind hole.
  • the threaded rod 21b of the screw 21 and the opening threaded 22a of the spacer 22 are made so that the rod 21b can be screwed into opening 21a.
  • the rod 22b extending the spacer 22 in the axial direction has a thread identical to the thread of the rod 21b of the screw 21, which allows in certain embodiments which will be described more away, to fix the spacers 22 constituting elements modular in extension of one another.
  • the connecting device 20 further comprises a nut 23 whose threaded opening allows screwing on the threaded rod 22b extending the spacer 22.
  • the anti-vibration bars 25 and 25 ' are crossed by respective openings 26 and 26 ', the diameter is greater than the diameter of the rod 21b of the screw and rod 22b of the spacer which have, as indicated above, identical threads and diameters.
  • the head 21a of the screw 21 has substantially the shape of a square whose side is longer than the width of a anti-vibration bar such as 25.
  • the head 21a of the screw has on its face internal, a cavity 27 having two parallel edges and crossing the screw head over its entire length, the width is substantially equal to the width of a bar antivibration such as 25.
  • screw head 21a could also have the shape of a circular disc in which would be machined the cavity 27 around the rod screws 21b.
  • the spacer 22 has a body of a shape substantially cylindrical extended by the rod 22b which is coaxial with the cylindrical body of the spacer 22.
  • the body of the spacer 22 has counterbores planes 22c and 22d on its external surface ( Figure 5) which ensure the grip of the spacer body with a tightening tool such as a wrench to make its screwing during assembly of the connecting device 20.
  • the mounting of the connecting device 20 between the end parts 25b and 25'b of two anti-vibration bars 25 and 25 'located in intervals between successive rows of tubes 24 is produced during assembly of the steam generator harness, this assembly being generally produced by layers of successive tubes, the steam generator being placed in a layout where its axis is substantially horizontal.
  • the anti-vibration bars are inserted between the plies of tubes which are arranged one on the others following a stack intended to constitute the beam.
  • the screw head is oriented so that the cavity 27 is in the width direction of the anti-vibration bar 25 and engaged on the anti-vibration bar 25.
  • the rod 21b of the screw 21 is introduced into the opening 26 of the bar anti-vibration 25.
  • the spacer 22 is then introduced. between the end parts of the anti-vibration bars 25 and 25 ', the threaded rod 22b of the spacer 22 being engaged in the opening 26 'of the anti-vibration bar 25 '.
  • the spacer 22 can be easily inserted between the anti-vibration bars 25 and 25 ', because the bar 25 is simply placed on the last layer of tubes deposited.
  • the nut 23 is engaged on the end of the rod 22b of the spacer 22 for locking the the spacer.
  • Locking in rotation of the connecting device 20 is completed by welding points 28 between the nut 23 and the end portion of the rod 22b of the spacer 22.
  • the threaded parts 21b of the screw 21 and 22b of the spacer 22 has a length greater than the thickness anti-vibration bars 25 and 25 ', so that these threaded rods have parts protruding by relative to the crossing openings 26 and 26 'of the bars vibration dampers which are screwed into the spacer respectively 22 and through the nut 23.
  • the threaded opening 22a of the spacer 22 has sufficient length to receive the rod the opinion.
  • the thread pitches of rods 21b and 22b, of the threaded opening 22a and the threaded bore of the nut 23 are provided in directions allowing the tightening of the two rods inside the threaded openings.
  • connection device via a screwed nut then welded to the end of the spacer rod.
  • a second device has also been represented. 20 'of connection between a 25' 'anti-vibration bar and the bar 25 which includes a screw 21 'and a spacer 22' identical to screw 21 and to spacer 22 of the device 20.
  • the device 20 'does not have a fixing nut 23, the spacer 22 'being screwed, by means of its rod 22'b, in a tapped opening 29 machined in the bar anti-vibration 25.
  • the connecting device 20 ' is put in place then tightened in a single operation, by screwing the spacer 22 ', simultaneously in the tapped opening 29 and on the rod of the screw 21 'which engages in the opening threaded 22 'spacer.
  • Such a device which is substantially equivalent to device 18 or 18 'shown in Figures 2A and 2B respectively will be designated as a whole by the mark 30.
  • the connecting device 30 comprises a screw 31 substantially identical to the screw 21 of the device 20 which has been described above and four identical spacers 32a, 32b, 32c and 32d which are arranged one after the other the other in an alignment direction of the anti-vibration bars 35a, 35b, 35c, 35d and 35e according to which the anti-vibration bars are pierced with aligned openings.
  • the threaded rod of the screw 31 is engaged in the opening of the first anti-vibration bar 35a and the screw head 31 is engaged on this anti-vibration bar, so as to be blocked in rotation.
  • the first spacer 32a is screwed through of its threaded opening on the rod of the screw 31 and through the threaded rod which extends axially the spacer opposite the opening threaded and which is engaged in the opening of the bar anti-vibration 35b, in the threaded opening of the second spacer 32b.
  • the second spacer 32b is itself screwed on the threaded rod of the first spacer 32a and at inside the tapped opening of the third spacer 32c.
  • the last spacer 32d disposed between the anti-vibration bars 35d and 35e has a rod threaded through the last 35th anti-vibration bar and which has a projecting part on which is fixed a locking nut 33 which is tightened then fixed by solder points 36 on the threaded rod of the last spacer 32d.
  • last spacer 32d could also be fixed by its threaded rod, to the inside of a threaded opening machined in the last 35e anti-vibration bar.
  • the device 30 can have any number of identical spacers to make the connection between any number of anti-vibration bars of an assembly constituting a row aligned.
  • the device 37 is constituted in the form of a stirrup which is generally designated by the term anti-theft stirrup, because its function is to avoid the ejection upwards of the anti-vibration bars.
  • An anti-theft stirrup 37 is fixed by the end of one of its branches on a 32 'spacer of the device link 30 'arranged at the end of the row of anti-vibration bars.
  • the bracket 37 can be attached to the end of its second branch, at its second end (not shown), on a spacer of a connection device identical to the device 30 'and ensuring the connection of the end parts a set of anti-vibration bars.
  • the bracket 37 allows ensure the anti-theft hold of all the bars anti-vibration.
  • the ends of the stirrup are fixed in two spacers of two connecting devices according to the invention of the ends 15'b of the anti-vibration bars 15 'introduced between the plies of tubes 14'.
  • the spacer end 32 'of the connecting device 30' in which is fixed the branch of the stirrup 37 is extended by a fixing lug 38 of the stirrup 37 in which a curved end part of the stirrup is introduced and fixed by a weld 39.
  • the device according to the invention therefore makes it possible to simple and efficient fixing of anti-theft stirrups of the anti-vibration bars, when assembly of the steam generator harness.
  • the wedging device according to the invention comprising connecting devices constituted by identical screws and spacers therefore allows for quickly and easily linking any number anti-vibration bars when mounting the steam generator harness, using only modular elements with standard dimensions.
  • the wedging device according to the invention also allows for efficient and simple fixing anti-theft stirrups anti-vibration bars.
  • the invention is not limited to the embodiment that has been described.
  • the invention applies in the case of any generator steam or heat exchanger having a regular network of tubes with curved parts between which are inserted anti-vibration bars.

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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)
  • Supports For Pipes And Cables (AREA)

Description

L'invention concerne un dispositif de calage antivibratoire de tubes d'un échangeur de chaleur tel qu'un générateur de vapeur. The invention relates to a wedging device antivibration of tubes of a heat exchanger such than a steam generator.

Les générateurs de vapeur des réacteurs nucléaires à eau sous pression comportent des tubes pliés en U présentant deux branches serties à leurs extrémités dans une plaque tubulaire. Les tubes sont disposés suivant des nappes planes adjacentes. Les parties courbes des tubes du faisceau qui sont juxtaposées à sa partie supérieure présentent des rayons de courbures différents les uns des autres et sont placées de manière adjacente pour constituer une structure de forme sensiblement hémisphérique appelée "chignon". Steam generators in nuclear reactors pressurized water pipes are bent in a U shape having two branches set at their ends in a tubular plate. The tubes are arranged in adjacent flat sheets. The curved parts of the tubes of the beam which are juxtaposed at its upper part present radii of curvature different from each other others and are placed adjacent to constitute a substantially hemispherical structure called "bun".

Pendant le fonctionnement du générateur de vapeur, de l'eau sous pression à haute température circule dans les tubes du faisceau et de l'eau d'alimention est amenée au contact de la surface extérieure de ces tubes, le long desquels elle se déplace dans la direction verticale en s'échauffant puis en se vaporisant, pour ressortir sous forme de vapeur à la partie supérieure du générateur. While the generator is operating steam, high temperature pressurized water circulates in the bundle and feed water tubes is brought into contact with the outside surface of these tubes, along which it moves in the vertical direction by heating and then vaporizing, to come out as vapor at the top of the generator.

La circulation du fluide au contact des tubes peut provoquer des vibrations qui sont susceptibles d'entraíner des détériorations de ces tubes s'ils ne sont pas maintenus de manière efficace. The circulation of the fluid in contact with the tubes can cause vibrations which are likely to cause damage to these tubes if they are not maintained effectively.

La partie droite des tubes est engagée dans des entretoises situées à des distances régulières les unes des autres suivant la hauteur du faisceau. Ces parties droites sont donc maintenues de manière efficace par des éléments rigides. Les parties courbes des tubes du faisceau constituant le chignon doivent également être maintenues et l'on utilise généralement pour cela des barres-entretoises qui sont intercalées chacune entre deux nappes de tubes adjacentes du faisceau et disposées suivant des directions sensiblement radiales du chignon. Ces barres-entretoises sont généralement reliées deux à deux de manière articulée à l'une de leurs extrémités disposée à l'intérieur du chignon et placées de manière angulaire pour constituer des structures en forme de V. The right side of the tubes is engaged in spacers located at regular distances from each other others depending on the height of the beam. These parts straight lines are therefore effectively maintained by rigid elements. The curved parts of the bundle tubes constituting the bun should also be maintained and we generally use spacer bars for this which are each inserted between two layers of adjacent tubes of the bundle and arranged in substantially radial directions of the bun. These spacer bars are generally linked two by two from   hinged way at one of their ends arranged at inside the bun and placed angularly to form V-shaped structures

Les extrémités extérieures des barres antivibratoires opposées à leur partie centrale sont saillantes par rapport aux tubes constituant la couche externe du chignon et sont reliées entre elles par des moyens de liaison assurant le maintien des barres antivibratoires. The outer ends of the anti-vibration bars opposite their central part are protruding by relation to the tubes constituting the outer layer of the bun and are interconnected by connecting means ensuring the maintenance of anti-vibration bars.

On a proposé divers moyens de liaison des extrémités extérieures des barres antivibratoires utilisant des éléments de fixation placés au-dessus de la surface supérieure du chignon. Various means of connecting the outer ends of anti-vibration bars using fasteners placed above the upper surface of the bun.

On a par exemple proposé de souder les extrémités des barres antivibratoires sur des éléments courbes disposés suivant des plans méridiens du chignon. For example, it has been proposed to weld the ends anti-vibration bars on curved elements arranged in meridian planes of the bun.

On a également proposé de fixer les extrémités des barres antivibratoires, par exemple par soudure sur des anneaux sensiblement parallèles ou épingles disposés au-dessus de la surface supérieure du chignon. It has also been proposed to fix the ends anti-vibration bars, for example by welding on substantially parallel rings or pins arranged above the top surface of the bun.

Dans tous les cas, la fixation des barres antivibratoires nécessite des opérations complexes mettant le plus souvent en oeuvre des soudures qui doivent être effectuées au voisinage des tubes du faisceau qui risquent ainsi de subir certaines détériorations. De plus, les matériaux constituant les barres antivibratoires doivent être choisis pour permettre leur soudage et éventuellement leur traitement après soudage, dans de bonnes conditions métallurgiques. In all cases, the fixing of the bars antivibration requires complex operations putting most often using welds which must be carried out in the vicinity of the beam tubes which risk thus to undergo certain deteriorations. Moreover, the materials making up the anti-vibration bars must be chosen to allow their welding and possibly their treatment after welding, in good conditions metallurgical.

On a également proposé des dispositifs de liaison mécanique permettant de relier les extrémités extérieures des barres antivibratoires à des pièces de fixation telles que des anneaux de retenue disposées au dessus de la surface extérieure du chignon. Devices have also been proposed. mechanical connection to connect the ends of the anti-vibration bars to parts of fasteners such as retaining rings arranged at the above the outside surface of the bun.

Ces dispositifs sont relativement complexes et nécessitent pour leur fixation l'utilisation d'éléments complémentaires lourds et volumineux rapportés sur le chignon. En outre, ces dispositifs ne permettent pas d'assurer un très bon alignement des barres antivibratoires et de régler de manière précise le jeu existant entre deux barres antivibratoires successives entre lesquelles est intercalée une nappe de tubes. These devices are relatively complex and require for their fixation the use of elements   additional heavy and bulky reported on the hair bun. In addition, these devices do not allow ensure very good alignment of the anti-vibration bars and fine-tune the play between two successive anti-vibration bars between which a sheet of tubes is interposed.

Dans le FR-A-2.664.965, on a proposé un dispositif de calage comportant des moyens de liaison entre les extrémités extérieures de barres antivibratoires disposées suivant des ensembles d'au moins deux barres dans lesquels les barres sont alignées et comportent des ouvertures traversantes alignées dont l'une est taraudée. Les moyens de liaison des barres antivibratoires comportent une broche qui est introduite dans les ouvertures alignées de l'ensemble de barres antivibratoires et dans l'alésage d'entretoises qui sont intercalées chacune entre deux barres antivibratoires successives. La broche qui comporte une extrémité filetée est vissée dans l'ouverture taraudée d'une barre antivibratoire située à l'extrémité de la rangée. La broche est également solidaire d'un élément de blocage en rotation qui peut être soudé sur une entretoise. Un tel dispositif présente des avantages par rapport aux dispositifs mécaniques connus antérieurement mais nécessite l'utilisation de broches dont la longueur est adaptée au nombre de barres et à la longueur de la rangée de barres antivibratoires dont les extrémités sont assemblées entre elles. Dans certains cas, il est nécessaire d'utiliser une broche de grande longueur, ce qui peut présenter des inconvénients en ce qui concerne les conditions de pose et la résistance mécanique de la broche. In FR-A-2,664,965, a device has been proposed wedging comprising connecting means between the outer ends of anti-vibration bars arranged following sets of at least two bars in which bars are aligned and have openings through aligned one of which is tapped. Ways of the anti-vibration bars have a pin which is inserted into the aligned openings of the set of anti-vibration bars and in the bore spacers which are each inserted between two successive anti-vibration bars. The brooch which has a threaded end is screwed into the threaded opening an anti-vibration bar located at the end of the row. The spindle is also secured to an element of rotation lock which can be welded on a spacer. Such a device has advantages over mechanical devices known previously but requires the use of pins whose length is adapted to the number of bars and the length of the row anti-vibration bars whose ends are assembled between them. In some cases it is necessary use a very long spindle, which can have drawbacks with regard to the conditions the mechanical resistance of the spindle.

Le but de l'invention est donc de proposer un dispositif de calage antivibratoire de tubes d'un échangeur de chaleur comportant un faisceau de tubes pliés en U, fixés à leurs extrémités dans une plaque tubulaire, disposés suivant des nappes parallèles et dont les parties cintrées opposées à la plaque tubulaire et juxtaposées constituent un ensemble de forme sensiblement hémisphérique appelé chignon, le dispositif de calage comportant un ensemble de barres antivibratoires intercalées chacune entre les parties cintrées de deux nappes adjacentes de tubes du faisceau et disposées dans une direction sensiblement radiale du chignon, de manière à présenter une extrémité à l'extérieur du chignon et des moyens de liaison entre les parties d'extrémité extérieures des barres antivibratoires disposées suivant une pluralité d'ensembles d'au moins deux barres dans lesquels les barres sont alignées suivant une rangée rectiligne et comportent des ouvertures traversantes alignées, ce dispositif de calage mettant en oeuvre des éléments modulaires qui peuvent être facilement adaptés à un nombre quelconque de barres et à une rangée de barres d'une longueur quelconque. The object of the invention is therefore to propose a anti-vibration wedging device for exchanger tubes of heat comprising a bundle of tubes bent in U, fixed at their ends in a tubular plate, arranged in parallel layers and the parts of which   curved opposite the tube plate and juxtaposed constitute a set of substantially hemispherical shape called a bun, the wedging device comprising a set of antivibration bars inserted each between the curved parts of two adjacent layers of bundle tubes and arranged in a direction substantially radial of the bun, so as to present a end outside of the bun and means of connection between the outer end parts of the anti-vibration bars arranged in a plurality sets of at least two bars in which the bars are aligned in a straight row and have aligned through openings, this wedging device using elements modular that can be easily adapted to a number any of bars and a row of bars of a any length.

Dans ce but, les moyens de liaison entre les extrémités des barres antivibratoires comportent, pour chacun des ensembles de barres antivibratoires alignées suivant une rangée :

  • une vis ayant une tête destinée à venir en appui sur une première face d'une première barre antivibratoire à l'une des extrémités de la rangée et comportant des moyens de blocage en rotation par rapport à la première barre antivibratoire et une tige filetée engagée dans l'ouverture de la première barre antivibratoire, de manière à se trouver en saillie sur une seconde face de la première barre antivibratoire opposée à la première face,
  • au moins une entretoise ayant un axe longitudinal et un corps dont la longueur suivant l'axe de l'entretoise est sensiblement égal à l'écartement entre deux barres successives de la rangée et comportant suivant l'axe du corps, une ouverture taraudée sur une partie de la longueur du corps débouchant à une première extrémité axiale du corps de l'entretoise et une tige filetée dans le prolongement axial du corps, à son extrémité longitudinale opposée à la première extrémité ainsi qu'une surface de prise sur la surface extérieure du corps, et
  • un élément de fixation taraudé associé à une seconde barre antivibratoire différente de la première,
       la tige filetée de la vis ayant un filetage permettant sa fixation par vissage dans l'ouverture taraudée de l'entretoise et la tige filetée de l'entretoise ayant un filetage identique permettant sa fixation dans l'ouverture taraudée de l'élément de fixation ou dans une ouverture taraudée d'entretoise.
For this purpose, the connecting means between the ends of the anti-vibration bars comprise, for each of the sets of anti-vibration bars aligned in a row:
  • a screw having a head intended to come to bear on a first face of a first anti-vibration bar at one of the ends of the row and comprising means for locking in rotation relative to the first anti-vibration bar and a threaded rod engaged in the opening of the first anti-vibration bar, so as to be projecting from a second face of the first anti-vibration bar opposite the first face,
  • at least one spacer having a longitudinal axis and a body whose length along the axis of the spacer is substantially equal to the spacing between two successive bars of the row and comprising along the axis of the body, a tapped opening on a part of the length of the body opening at a first axial end of the body of the spacer and a threaded rod in the axial extension of the body, at its longitudinal end opposite the first end and a grip surface on the external surface of the body, and
  • a threaded fastening element associated with a second anti-vibration bar different from the first,
    the threaded rod of the screw having a thread allowing its fixing by screwing in the threaded opening of the spacer and the threaded rod of the spacer having an identical thread allowing its fixing in the threaded opening of the fixing element or in a threaded spacer opening.

Afin de bien faire comprendre l'invention, on va maintenant décrire, à titre d'exemple non limitatif, en se référant aux figures jointes en annexe, un générateur de vapeur d'un réacteur nucléaire à eau sous pression et un dispositif de calage selon l'invention associé à ce généteur de vapeur. In order to clearly understand the invention, we will now describe, by way of nonlimiting example, by referring to the attached figures, a generator of steam from a pressurized water nuclear reactor and a wedging device according to the invention associated with this generator steam.

La figure 1 est une vue en élévation avec coupe partielle par un plan vertical d'un générateur de vapeur d'un réacteur nucléaire à eau sous pression. Figure 1 is an elevational sectional view partial by a vertical plane of a steam generator of a pressurized water nuclear reactor.

La figure 2A est une vue partielle de dessus et en coupe suivant 2-2 de la figure 1, d'une partie supérieure du chignon d'un générateur de vapeur ayant un réseau de tubes à pas carrés et un dispositif de calage antivibratoire suivant l'invention. FIG. 2A is a partial view from above and in section along 2-2 of Figure 1, of an upper part the bun of a steam generator having a array of square pitch tubes and a wedging device anti-vibration according to the invention.

La figure 2B est une vue analogue à la vue de la figure 2A, dans le cas d'un générateur de vapeur ayant un faisceau de tubes à pas triangulaires. FIG. 2B is a view similar to the view of the FIG. 2A, in the case of a steam generator having a bundle of triangular pitch tubes.

La figure 3 est une vue en coupe par un plan perpendiculaire aux nappes de tubes du faisceau, d'un dispositif de liaison de barres antivibratoires suivant un premier mode de réalisation. Figure 3 is a sectional view through a plane perpendicular to the bundle of tube plies, one anti-vibration bar connection device according to a first embodiment.

La figure 4 est une vue en coupe suivant 4-4 de la figure 3. Figure 4 is a sectional view along 4-4 of Figure 3.  

La figure 5 est une vue de dessus suivant 5 de la figure 4. Figure 5 is a top view along 5 of Figure 4.

La figure 6 est une vue de dessus et en coupe partielle d'un moyen de liaison d'un ensemble de barres antivibratoires d'un dispositif de calage suivant l'invention et suivant un second mode de réalisation. Figure 6 is a top view and in section partial of a connecting means of a set of bars antivibration of a wedging device according to the invention and according to a second embodiment.

La figure 7 est une vue de dessus de moyens de liaison de barres antivibratoires d'un dispositif de calage suivant l'invention et suivant une variante du premier mode de réalisation. Figure 7 is a top view of means of connection of anti-vibration bars of a calibration according to the invention and according to a variant of the first embodiment.

La figure 8 est une vue de dessus d'une partie d'un dispositif de calage suivant l'invention comportant un étrier de maintien des tubes du faisceau. Figure 8 is a top view of part a wedging device according to the invention comprising a bracket for holding the bundle tubes.

La figure 9 est une vue à plus grande échelle d'un détail de réalisation de la fixation de l'étrier de maintien représenté sur la figure 8. Figure 9 is an enlarged view of a detail of realization of the fixing of the stirrup of support shown in Figure 8.

Sur la figure 1, on voit un générateur de vapeur d'un réacteur nucléaire à eau sous pression désigné de manière générale par le repère 1 et comportant une enveloppe externe 2 reliée, à sa partie inférieure, à une plaque tubulaire 3 de forte épaisseur. In Figure 1, we see a steam generator of a pressurized water nuclear reactor designated by generally by the reference 1 and comprising an envelope external 2 connected, at its lower part, to a very thick tubular plate 3.

L'enveloppe 2 renferme le faisceau de tubes du générateur de vapeur constitué par des tubes 5 pliés en U et comportant à leur partie supérieure des cintres semi-circulaires 5b constituant le chignon du générateur de vapeur. Envelope 2 contains the tube bundle of the steam generator made up of 5 tubes bent in U and comprising at their upper part semicircular hangers 5b constituting the bun of the generator steam.

Les parties droites 5a des tubes du faisceau sont serties à leurs extrémités dans la plaque tubulaire 3, de manière à déboucher dans une boíte à eau 7 en deux parties séparées par une cloison 8. The straight parts 5a of the bundle tubes are crimped at their ends in the tube plate 3, so as to lead into a water box 7 in two parts separated by a partition 8.

La plaque tubulaire 3 est traversée par un réseau régulier de trous dans chacun desquels est fixée une extrémité d'un tube du faisceau. The tubular plate 3 is crossed by a regular network of holes in each of which is fixed one end of a bundle tube.  

Le réseau régulier des trous traversant la plaque tubulaire 3 peut être par exemple à mailles carrées ou à mailles triangulaires. The regular network of holes crossing the tubular plate 3 may for example be square mesh or triangular mesh.

On a représenté sur les figures 2A et 2B une partie d'un dispositif de calage suivant l'invention, dans le cas d'un faisceau de tubes fixés dans des trous d'un réseau à mailles carrées traversant la plaque tubulaire et dans le cas d'un faisceau de tubes maintenus dans des trous formant un réseau à mailles triangulaires traversant la plaque tubulaire 3, respectivement. FIGS. 2A and 2B show a part of a wedging device according to the invention, in the case of a bundle of tubes fixed in holes of a square mesh network crossing the tube plate and in the case of a bundle of tubes held in holes forming a triangular mesh network crossing the tube plate 3, respectively.

L'eau sous pression de refroidissement du réacteur nucléaire pénètre dans l'une des parties de la boíte à eau 7 par une tubulure d'entrée 6a, circule dans les tubes du faisceau puis ressort par une tubulure de sortie 6b. Le faisceau de tubes 5 est entouré par une enveloppe de faisceau 9 permettant de canaliser l'eau d'alimentation pénétrant dans l'enveloppe du générateur de vapeur par une tubulure d'arrivée 11. L'eau d'alimentation du générateur de vapeur circule d'abord de haut en bas dans l'espace annulaire 4 situé autour de l'enveloppe du faisceau 9, puis de bas en haut au contact des tubes 5 du faisceau, de manière à s'échauffer puis à se vaporiser et à ressortir sous la forme de vapeur par la tubulure supérieure 12 du générateur de vapeur. Reactor cooling water pressure nuclear enters one part of the box 7 through an inlet pipe 6a, circulates in the bundle tubes then exit through an outlet tube 6b. The bundle of tubes 5 is surrounded by an envelope of beam 9 making it possible to channel the supply water entering the envelope of the steam generator through a inlet manifold 11. Generator supply water steam first flows up and down in space annular 4 located around the envelope of the bundle 9, then from bottom to top in contact with the tubes 5 of the bundle, so as to heat up then vaporize and come out in the form of vapor through the upper tube 12 of the steam generator.

La partie supérieure du faisceau de tubes appelée chignon est constituée par la juxtaposition de cintres de forme semi-circulaire disposés suivant des nappes successives dans lesquelles les rayons des cintres 5b sont décroissants de l'extérieur vers l'intérieur du faisceau. The upper part of the tube bundle called bun is formed by the juxtaposition of hangers of semi-circular shape arranged in successive layers in which the radii of the hangers 5b are decreasing from the outside to the inside of the beam.

De plus, les différentes nappes successives de tubes du faisceau parallèles à la couche centrale représentées sur la figure 1 comportent des cintres extérieurs de diamètres décroissants vers l'extérieur, si bien que la partie supérieure du faisceau ou chignon constitue un ensemble de forme sensiblement hémisphérique. In addition, the different successive layers of bundle tubes parallel to the central layer shown in Figure 1 have exterior hangers decreasing in diameter towards the outside, so that the upper part of the bundle or bun constitutes a substantially hemispherical in shape.  

La partie rectiligne 5a des tubes 5 est maintenue par des plaques-entretoises 10 qui empêchent la mise en vibrations des tubes lorsque le générateur de vapeur est en service sous l'effet de la circulation des fluides d'échange. The straight part 5a of the tubes 5 is maintained by spacer plates 10 which prevent the setting in tube vibrations when the steam generator is in service due to the circulation of fluids exchange.

Les parties cintrées 5b des tubes situées à l'extrémité supérieure du faisceau sont maintenues par des barres antivibratoires 15 constituées sous la forme de V articulés ou non à leurs extrémités intérieures 15a et introduites entre les couches de tubes successives au niveau des cintres. The curved parts 5b of the tubes located at the upper end of the beam are held in place by anti-vibration bars 15 formed as a V articulated or not at their inner ends 15a and introduced between successive layers of tubes at level of hangers.

Les extrémités extérieures 15b des branches des barres antivibratoires sont saillantes par rapport à la surface supérieure du chignon et permettent de réaliser la fixation des barres antivibratoires. The outer ends 15b of the branches of the antivibration bars are protruding compared to the upper surface of the bun and allow the fixing the anti-vibration bars.

Par la suite, on désignera par barre antivibratoire une branche quelconque d'un ensemble 15 en forme de V. Thereafter, we will designate by anti-vibration bar any branch of a set 15 in the form of V.

Sur les figures 2A et 2B, on a représenté dans une vue de dessus avec coupe des nappes de tubes dans leur partie supérieure, une partie d'un ensemble de calage suivant l'invention, dans le cas d'un faisceau de tubes maintenus dans une disposition à réseau à mailles carrées et dans le cas d'un faisceau de tubes maintenus dans une disposition à réseau à mailles triangulaires, respectivement. In FIGS. 2A and 2B, there is shown in a top view with section of the plies of tubes in their upper part, part of a shimming assembly according to the invention, in the case of a bundle of tubes maintained in a square mesh network layout and in the case of a bundle of tubes held in a layout with triangular mesh network, respectively.

Les tubes du faisceau sont maintenus dans une disposition en réseau régulier par les ouvertures de la plaque tubulaire 3 et par les ouvertures de traversée des plaques-entretoises 10 qui comportent des réseaux d'ouvertures analogues. The bundle tubes are held in a regular network layout through the openings in the tube plate 3 and through the through openings of the spacer plates 10 which have networks of openings analogues.

La disposition des tubes dans le cas d'un réseau à mailles triangulaires se traduit en particulier par un espace entre les nappes successives de tubes plus faible que dans le cas d'un réseau à mailles carrées. The arrangement of the tubes in the case of a network triangular mesh results in particular in a lower space between successive layers of tubes than in the case of a square mesh network.  

La mise en place de moyens de liaison entre les extrémités des barres antivibratoires introduites entre les nappes de tubes est donc plus difficile, dans le cas d'un réseau à mailles triangulaires, du fait du plus faible espacement entre les nappes et donc entre les barres antivibratoires glissées entre les nappes de tubes. Le dispositif suivant l'invention est particulièrement bien adapté au cas d'un réseau de tubes serrés à mailles triangulaires mais il peut être appliqué bien entendu au cas d'un réseau à mailles carrées. The establishment of means of connection between the ends of the anti-vibration bars inserted between the plies of tubes is therefore more difficult, in the case of a triangular mesh network, because of the more low spacing between the layers and therefore between the anti-vibration bars slid between the layers of tubes. The device according to the invention is particularly well suited to the case of a network of tight mesh tubes triangular but it can of course be applied to case of a square mesh network.

Sur les figures 2A et 2B, les éléments correspondants portent les mêmes repères avec toutefois le signe ' (prime) dans le cas des éléments de la figure 2B relative à un réseau à mailles triangulaires. In FIGS. 2A and 2B, the corresponding elements bear the same references with the sign ' (prime) in the case of the elements in FIG. 2B relating to a triangular mesh network.

Sur les figures 2A et 2B, on a représenté les tubes 14 ou 14' du réseau de tubes constituant les couches externes du chignon du générateur de vapeur. In FIGS. 2A and 2B, the tubes 14 or 14 'of the network of tubes constituting the layers external parts of the steam generator bun.

Les tubes 14 ou 14' constituent des nappes successives parallèles 13 ou 13' entre lesquelles sont intercalées les barres antivibratoires 15 ou 15'. The tubes 14 or 14 'constitute successive layers parallels 13 or 13 'between which are inserted 15 or 15 'anti-vibration bars.

Dans la partie du faisceau de tubes du générateur de vapeur constituant le chignon, les nappes de tubes sont constituées par les parties supérieures cintrées des tubes juxtaposés et de rayons décroissants depuis l'extérieur vers l'intérieur du chignon. In the part of the generator tube bundle steam constituting the bun, the layers of tubes consist of the curved upper parts of the juxtaposed tubes with decreasing radii from the outside towards the inside of the bun.

Les barres antivibratoires 15 comportent des extrémités 15b saillantes à l'extérieur du chignon et disposées dans l'alignement l'une de l'autre pour constituer des rangées de longueur variable. The antivibration bars 15 include projecting ends 15b on the outside of the bun and arranged in alignment with each other to constitute variable length rows.

Les extrémités saillantes 15b des barres antivibratoires sont reliées entre elles par des moyens de liaison tels que 16, 17, 18 et 19 permettant respectivement d'assurer la liaison de deux, trois, cinq ou d'un plus grand nombre de barres antivibratoires constituant un ensemble de barres alignées. The protruding ends 15b of the anti-vibration bars are interconnected by means of bond such as 16, 17, 18 and 19 respectively allowing liaise two, three, five or one greater number of anti-vibration bars constituting a set of aligned bars.  

Selon l'invention, les dispositifs de liaison tels que 16, 17, 18 et 19 peuvent être réalisés à partir d'éléments modulaires identiques qui seront décrits par la suite. According to the invention, the connecting devices such as 16, 17, 18 and 19 can be made from identical modular elements which will be described by the after.

De même, les parties d'extrémité des barres antivibratoires 15' intercalées entre les nappes de tubes disposées suivant un réseau à mailles triangulaires comme représenté sur la figure 2B peuvent être reliées par l'intermédiaire de moyens de liaison tels que 16', 17', 18' et 19' permettant de relier entre elles les extrémités d'un ensemble de deux, quatre, cinq ou plus de cinq barres antivibratoires, respectivement. Likewise, the end portions of the bars anti-vibration 15 'inserted between the plies of tubes arranged in a triangular mesh network as shown in Figure 2B can be connected by through connecting means such as 16 ', 17', 18 'and 19' to connect the ends together a set of two, four, five or more than five bars antivibration, respectively.

Dans tous les cas, les extrémités 15b ou 15'b des barres antivibratoires qui sont reliées ensemble par un dispositif de liaison tel que 16, 17, 18 et 19 ou 16', 17', 18' et 19' sont traversées par des ouvertures alignées suivant un axe perpendiculaire aux extrémités des barres antivibratoires. In all cases, the ends 15b or 15'b anti-vibration bars which are connected together by a connection device such as 16, 17, 18 and 19 or 16 ', 17 ', 18' and 19 'are crossed by aligned openings along an axis perpendicular to the ends of the anti-vibration bars.

On va maintenant se reporter aux figures 3 à 5 pour décrire les moyens de liaison d'un dispositif de calage suivant l'invention permettant de relier entre elles les extrémités de deux barres antivibratoires. We will now refer to Figures 3 to 5 to describe the connection means of a wedging according to the invention making it possible to link between they the ends of two anti-vibration bars.

Un tel dispositif qui sera désigné dans son ensemble par le repère 20 sur les figures 3 à 5 est analogue au dispositif 16 ou 16' représenté sur les figures 2A et 2B, respectivement. Such a device which will be designated in its together by the mark 20 in Figures 3 to 5 is similar to device 16 or 16 'shown in Figures 2A and 2B, respectively.

Le dispositif 20 qui permet d'assurer la liaison entre les parties d'extrémité 25b et 25'b de deux barres antivibratoires 25 et 25' disposées dans deux espaces successifs entre des rangées de tubes 24 comporte une vis 21, une entretoise 22 et un écrou 23. La vis 21 comporte une tête 21a solidaire, d'une tige filetée 21b. The device 20 which ensures the connection between the end portions 25b and 25'b of two bars anti-vibration 25 and 25 'arranged in two successive spaces between rows of tubes 24 comprises a screw 21, a spacer 22 and a nut 23. The screw 21 has a head 21a secured to a threaded rod 21b.

L'entretoise 22 comporte une ouverture taraudée 22a et une tige filetée 22b disposées suivant l'axe de l'entretoise, la tige 22b étant saillante par rapport à l'extrémité de l'entretoise 22 opposée à son extrémité sur laquelle débouche l'ouverture taraudée 22a qui est réalisée sous la forme d'un trou borgne. Spacer 22 has a threaded opening 22a and a threaded rod 22b arranged along the axis of the spacer, the rod 22b projecting from   the end of the spacer 22 opposite its end on which opens the tapped opening 22a which is produced in the form of a blind hole.

La tige filetée 21b de la vis 21 et l'ouverture taraudée 22a de l'entretoise 22 sont réalisées de manière qu'on puisse réaliser le vissage de la tige 21b dans l'ouverture 21a. The threaded rod 21b of the screw 21 and the opening threaded 22a of the spacer 22 are made so that the rod 21b can be screwed into opening 21a.

La tige 22b prolongeant l'entretoise 22 dans la direction axiale présente un filetage identique au filetage de la tige 21b de la vis 21, ce qui permet dans certaines formes de réalisation qui seront décrites plus loin, de fixer les entretoises 22 constituant des éléments modulaires dans le prolongement l'une de l'autre. The rod 22b extending the spacer 22 in the axial direction has a thread identical to the thread of the rod 21b of the screw 21, which allows in certain embodiments which will be described more away, to fix the spacers 22 constituting elements modular in extension of one another.

Le dispositif de liaison 20 comporte de plus un écrou 23 dont l'ouverture taraudée permet le vissage sur la tige filetée 22b prolongeant l'entretoise 22. The connecting device 20 further comprises a nut 23 whose threaded opening allows screwing on the threaded rod 22b extending the spacer 22.

Les barres antivibratoires 25 et 25' sont traversées par des ouvertures respectives 26 et 26' dont le diamètre est supérieur au diamètre de la tige 21b de la vis et de la tige 22b de l'entretoise qui présentent, comme indiqué plus haut des filetages et diamètres identiques. The anti-vibration bars 25 and 25 'are crossed by respective openings 26 and 26 ', the diameter is greater than the diameter of the rod 21b of the screw and rod 22b of the spacer which have, as indicated above, identical threads and diameters.

Comme il est visible sur la figure 5, la tête 21a de la vis 21 présente sensiblement la forme d'un carré dont le côté a une longueur supérieure à la largeur d'une barre antivibratoire telle que 25. As can be seen in Figure 5, the head 21a of the screw 21 has substantially the shape of a square whose side is longer than the width of a anti-vibration bar such as 25.

La tête 21a de la vis comporte sur sa face interne, une cavité 27 ayant deux bords parallèles et traversant la tête de vis sur toute sa longueur, dont la largeur est sensiblement égale à la largeur d'une barre antivibratoire telle que 25. The head 21a of the screw has on its face internal, a cavity 27 having two parallel edges and crossing the screw head over its entire length, the width is substantially equal to the width of a bar antivibration such as 25.

La présence de la cavité 27 sur la face inférieure de la tête de vis 21a permet d'engager la tête de vis sur la barre antivibratoire 25, lors du montage du dispositif de liaison 20. On obtient ainsi un blocage en rotation de la vis par rapport à la barre antivibratoire 25. The presence of the cavity 27 on the underside of the screw head 21a makes it possible to engage the head of screw on the anti-vibration bar 25, when mounting the connecting device 20. A blocking is thus obtained   rotation of the screw relative to the anti-vibration bar 25.

Il est bien évident que la tête de vis 21a pourrait avoir également la forme d'un disque circulaire dans lequel serait usinée la cavité 27 autour de la tige de vis 21b. It is obvious that the screw head 21a could also have the shape of a circular disc in which would be machined the cavity 27 around the rod screws 21b.

L'entretoise 22 présente un corps d'une forme sensiblement cylindrique prolongé par la tige 22b qui est coaxiale au corps cylindrique de l'entretoise 22. The spacer 22 has a body of a shape substantially cylindrical extended by the rod 22b which is coaxial with the cylindrical body of the spacer 22.

Le corps de l'entretoise 22 présente des lamages plans 22c et 22d sur sa surface externe (figure 5) qui permettent d'assurer la prise du corps de l'entretoise avec un outil de serrage tel qu'une clé pour réaliser son vissage lors du montage du dispositif de liaison 20. The body of the spacer 22 has counterbores planes 22c and 22d on its external surface (Figure 5) which ensure the grip of the spacer body with a tightening tool such as a wrench to make its screwing during assembly of the connecting device 20.

Le montage du dispositif 20 de liaison entre les parties d'extrémité 25b et 25'b de deux barres antivibratoires 25 et 25' situées dans des intervalles entre des rangées successives de tubes 24 est réalisé lors du montage du faisceau du générateur de vapeur, ce montage étant généralement réalisé par nappes de tubes successives, le générateur de vapeur étant placé dans une disposition où son axe est sensiblement horizontal. The mounting of the connecting device 20 between the end parts 25b and 25'b of two anti-vibration bars 25 and 25 'located in intervals between successive rows of tubes 24 is produced during assembly of the steam generator harness, this assembly being generally produced by layers of successive tubes, the steam generator being placed in a layout where its axis is substantially horizontal.

Les barres antivibratoires sont intercalées entre les nappes de tubes qui sont disposées les unes sur les autres suivant un empilement destiné à constituer le faisceau. The anti-vibration bars are inserted between the plies of tubes which are arranged one on the others following a stack intended to constitute the beam.

Lorsqu'on a réalisé l'empilement de deux nappes successives entre lesquelles on a intercalé des barres antivibratoires, on vient disposer un nouveau jeu de barres antivibratoires au-dessus de la dernière nappe de tubes déposée et engagée dans les ouvertures de la plaque tubulaire du générateur de vapeur. When the stacking of two layers has been carried out between which bars have been inserted anti-vibration, we have a new set of anti-vibration bars above the last layer of tubes deposited and engaged in the plate openings steam generator tubular.

On réalise alors la liaison des extrémités des barres antivibratoires telles que 25 et 25' disposées entre les deux nappes de tubes 24 qui viennent d'être déposées et au-dessus de la dernière nappe déposée, respectivement. The ends of the anti-vibration bars such as 25 and 25 'arranged between the two layers of tubes 24 which have just been   deposited and above the last tablecloth deposited, respectively.

Pour réaliser la liaison entre deux barres antivibratoires 25 et 25' en utilisant un dispositif 20 tel que représenté sur la figure 3, la tête de vis est orientée de manière que la cavité 27 se trouve dans le sens de la largeur de la barre antivibratoire 25 et engagée sur la barre antivibratoire 25. La tige 21b de la vis 21 est introduite dans l'ouverture 26 de la barre antivibratoire 25. On introduit ensuite l'entretoise 22 entre les parties d'extrémité des barres antivibratoires 25 et 25', la tige filetée 22b de l'entretoise 22 étant engagée dans l'ouverture 26' de la barre antivibratoire 25'. To make the connection between two bars anti-vibration 25 and 25 'using a device 20 as shown in Figure 3, the screw head is oriented so that the cavity 27 is in the width direction of the anti-vibration bar 25 and engaged on the anti-vibration bar 25. The rod 21b of the screw 21 is introduced into the opening 26 of the bar anti-vibration 25. The spacer 22 is then introduced. between the end parts of the anti-vibration bars 25 and 25 ', the threaded rod 22b of the spacer 22 being engaged in the opening 26 'of the anti-vibration bar 25 '.

L'entretoise 22 peut être facilement intercalée entre les barres antivibratoires 25 et 25', du fait que la barre 25 est simplement posée sur la dernière nappe de tubes déposée. The spacer 22 can be easily inserted between the anti-vibration bars 25 and 25 ', because the bar 25 is simply placed on the last layer of tubes deposited.

On peut alors réaliser le serrage du dispositif de liaison par l'intermédiaire d'une clé de serrage venant en prise avec les lamages 22c et 22d de l'entretoise 22. On réalise le vissage de l'entretoise 22 sur la tige de vis 22b et le serrage de la vis 21 et de l'entretoise 22 contre la barre 25 qui est engagée dans la cavité 27. We can then tighten the device connection by means of a tightening key in engagement with the counterbores 22c and 22d of the spacer 22. Screwing the spacer 22 on the rod screw 22b and tightening of screw 21 and spacer 22 against the bar 25 which is engaged in the cavity 27.

L'écrou 23 est engagé sur l'extrémité de la tige 22b de l'entretoise 22 pour réaliser le verrouillage de l'entretoise. The nut 23 is engaged on the end of the rod 22b of the spacer 22 for locking the the spacer.

Le blocage en rotation du dispositif de liaison 20 est complété par des points de soudure 28 entre l'écrou 23 et la partie d'extrémité de la tige 22b de l'entretoise 22. Locking in rotation of the connecting device 20 is completed by welding points 28 between the nut 23 and the end portion of the rod 22b of the spacer 22.

L'engagement de la tête de vis 21a sur la barre antivibratoire 25 par l'intermédiaire de la cavité 27 permet de réaliser le blocage en rotation de la vis par rapport à l'entretoise, le blocage en rotation de l'entretoise par rapport à l'écrou 23 étant assuré par les points de soudure 28. The engagement of the screw head 21a on the bar anti-vibration 25 via cavity 27 allows the screw to be locked in rotation by compared to the spacer, the rotation blocking of the spacer   relative to the nut 23 being secured by the points solder 28.

Les parties filetées 21b de la vis 21 et 22b de l'entretoise 22 ont une longueur supérieure à l'épaisseur des barres antivibratoires 25 et 25', de manière que ces tiges filetées présentent des parties en saillie par rapport aux ouvertures de traversée 26 et 26' des barres antivibratoires qui sont vissées respectivement dans l'entretoise 22 et à travers l'écrou 23. The threaded parts 21b of the screw 21 and 22b of the spacer 22 has a length greater than the thickness anti-vibration bars 25 and 25 ', so that these threaded rods have parts protruding by relative to the crossing openings 26 and 26 'of the bars vibration dampers which are screwed into the spacer respectively 22 and through the nut 23.

L'ouverture taraudée 22a de l'entretoise 22 présente une longueur suffisante pour recevoir la tige de la vis. The threaded opening 22a of the spacer 22 has sufficient length to receive the rod the opinion.

Les pas des filetages des tiges 21b et 22b, de l'ouverture taraudée 22a et de l'alésage taraudé de l'écrou 23 sont prévus dans des sens permettant le serrage des deux tiges à l'intérieur des ouvertures taraudées. The thread pitches of rods 21b and 22b, of the threaded opening 22a and the threaded bore of the nut 23 are provided in directions allowing the tightening of the two rods inside the threaded openings.

Dans certains cas, pour des questions d'encombrement, il n'est pas possible de réaliser la fixation du dispositif de liaison par l'intermédiaire d'un écrou vissé puis soudé sur l'extrémité de la tige de l'entretoise. In some cases, for reasons of space, it is not possible to fix the connection device via a screwed nut then welded to the end of the spacer rod.

Dans ce cas, il est possible, comme représenté sur la figure 7, de fixer la tige filetée d'extrémité de l'entretoise dans une ouverture taraudée d'une barre antivibratoire, cette ouverture taraudée étant identique à l'alésage taraudé de l'écrou. In this case it is possible, as shown in figure 7, to fix the threaded end rod of the spacer in a threaded opening of an anti-vibration bar, this tapped opening being identical to the threaded bore of the nut.

Sur la figure 7, on a ainsi représenté un premier dispositif de liaison 20 de deux barres antivibratoires 25 et 25' qui est identique au dispositif qui vient d'être décrit. In Figure 7, there is thus shown a first connecting device 20 of two anti-vibration bars 25 and 25 'which is identical to the device which comes to be described.

On a également représenté un second dispositif 20' de liaison entre une barre antivibratoire 25'' et la barre 25 qui comporte une vis 21' et une entretoise 22' identiques à la vis 21 et à l'entretoise 22 du dispositif 20. A second device has also been represented. 20 'of connection between a 25' 'anti-vibration bar and the bar 25 which includes a screw 21 'and a spacer 22' identical to screw 21 and to spacer 22 of the device 20.  

A la différence du dispositif 20, le dispositif 20' ne comporte pas d'écrou de fixation 23, l'entretoise 22' étant vissée, par l'intermédiaire de sa tige 22'b, dans une ouverture taraudée 29 usinée dans la barre antivibratoire 25. Unlike the device 20, the device 20 'does not have a fixing nut 23, the spacer 22 'being screwed, by means of its rod 22'b, in a tapped opening 29 machined in the bar anti-vibration 25.

Le dispositif de liaison 20' est mis en place puis serré en une seule opération, par vissage de l'entretoise 22', simultanément dans l'ouverture taraudée 29 et sur la tige de la vis 21' qui s'engage dans l'ouverture taraudée de l'entretoise 22'. The connecting device 20 'is put in place then tightened in a single operation, by screwing the spacer 22 ', simultaneously in the tapped opening 29 and on the rod of the screw 21 'which engages in the opening threaded 22 'spacer.

Sur la figure 6, on a représenté un dispositif de liaison permettant d'assurer la liaison de cinq barres antivibratoires successives 35a, 35b, 35c, 35d et 35e. In Figure 6, there is shown a device link to link five bars successive antivibrations 35a, 35b, 35c, 35d and 35e.

Un tel dispositif qui est sensiblement équivalent au dispositif 18 ou 18' représenté sur les figures 2A et 2B respectivement sera désigné dans son ensemble par le repère 30. Such a device which is substantially equivalent to device 18 or 18 'shown in Figures 2A and 2B respectively will be designated as a whole by the mark 30.

Le dispositif de liaison 30 comporte une vis 31 sensiblement identique à la vis 21 du dispositif 20 qui a été décrit plus haut et quatre entretoises identiques 32a, 32b, 32c et 32d qui sont disposées l'une à la suite de l'autre dans une direction d'alignement des barres antivibratoires 35a, 35b, 35c, 35d et 35e suivant laquelle les barres antivibratoires sont percées d'ouvertures alignées. The connecting device 30 comprises a screw 31 substantially identical to the screw 21 of the device 20 which has been described above and four identical spacers 32a, 32b, 32c and 32d which are arranged one after the other the other in an alignment direction of the anti-vibration bars 35a, 35b, 35c, 35d and 35e according to which the anti-vibration bars are pierced with aligned openings.

La tige filetée de la vis 31 est engagée dans l'ouverture de la première barre antivibratoire 35a et la tête de la vis 31 est engagée sur cette barre antivibratoire, de manière à se trouver bloquée en rotation. The threaded rod of the screw 31 is engaged in the opening of the first anti-vibration bar 35a and the screw head 31 is engaged on this anti-vibration bar, so as to be blocked in rotation.

La première entretoise 32a est vissée par l'intermédiaire de son ouverture taraudée sur la tige de la vis 31 et par l'intermédiaire de la tige filetée qui prolonge axialement l'entretoise à l'opposé de l'ouverture taraudée et qui est engagée dans l'ouverture de la barre antivibratoire 35b, dans l'ouverture taraudée de la seconde entretoise 32b. The first spacer 32a is screwed through of its threaded opening on the rod of the screw 31 and through the threaded rod which extends axially the spacer opposite the opening threaded and which is engaged in the opening of the bar anti-vibration 35b, in the threaded opening of the second spacer 32b.  

La seconde entretoise 32b est elle-même vissée sur la tige filetée de la première entretoise 32a et à l'intérieur de l'ouverture taraudée de la troisième entretoise 32c. The second spacer 32b is itself screwed on the threaded rod of the first spacer 32a and at inside the tapped opening of the third spacer 32c.

On peut réaliser ainsi successivement le serrage et la fixation des rangées de barres antivibratoires intercalées entre les nappes de tubes 34. We can thus successively tighten and fixing the rows of anti-vibration bars interposed between the plies of tubes 34.

La dernière entretoise 32d disposée entre les barres antivibratoires 35d et 35e comporte une tige filetée qui traverse la dernière barre antivibratoire 35e et qui comporte une partie en saillie sur laquelle est fixé un écrou de blocage 33 qui est serré puis fixé par des points de soudure 36 sur la tige filetée de la dernière entretoise 32d. The last spacer 32d disposed between the anti-vibration bars 35d and 35e has a rod threaded through the last 35th anti-vibration bar and which has a projecting part on which is fixed a locking nut 33 which is tightened then fixed by solder points 36 on the threaded rod of the last spacer 32d.

Il est bien évident que la dernière entretoise 32d pourrait également être fixée par sa tige filetée, à l'intérieur d'une ouverture taraudée usinée dans la dernière barre antivibratoire 35e. It is obvious that the last spacer 32d could also be fixed by its threaded rod, to the inside of a threaded opening machined in the last 35e anti-vibration bar.

Il est à remarquer que le dispositif 30 peut comporter un nombre quelconque d'entretoises identiques pour réaliser la liaison entre un nombre quelconque de barres antivibratoires d'un ensemble constituant une rangée alignée. It should be noted that the device 30 can have any number of identical spacers to make the connection between any number of anti-vibration bars of an assembly constituting a row aligned.

Dans tous les cas, quel que soit le nombre de barres antivibratoires de l'ensemble de barres alignées, on utilise une seule vis de blocage 31 et un seul écrou 33, seul le nombre d'entretoises intercalées entre les barres antivibratoires étant variable. Quel que soit le nombre de barres antivibratoires dont on assure la liaison, la vis 31 et l'écrou 33 sont identiques. In any case, regardless of the number of anti-vibration bars of the set of aligned bars, only one locking screw 31 and one nut are used 33, only the number of spacers inserted between the anti-vibration bars being variable. Regardless number of anti-vibration bars which are linked, the screw 31 and the nut 33 are identical.

On peut donc réaliser la liaison d'un nombre quelconque de barres antivibratoires alignées, en utilisant des éléments modulaires qui doivent être simplement approvisionnés sur le chantier de construction du générateur de vapeur, en nombre suffisant. We can therefore link a number any of the anti-vibration bars aligned, using modular elements which should be simply supplied on the generator construction site sufficient steam.  

Dans certains cas, notamment lorsqu'il n'y a pas d'accrochage en partie centrale les barres antivibratoires doivent être maintenues par des dispositifs permettant d'empêcher leur éjection. In some cases, especially when there is no hooking the anti-vibration bars in the central part must be maintained by devices allowing to prevent their ejection.

On a représenté un tel dispositif désigné par le repère 37 sur la figure 2A, dans le cas d'un faisceau de tubes à pas carré, et sur la figure 2B, dans le cas d'un faisceau de tubes à pas triangulaire. There is shown such a device designated by the item 37 in FIG. 2A, in the case of a beam of square pitch tubes, and in Figure 2B, in the case of a bundle of triangular pitch tubes.

Le dispositif 37 est constitué sous la forme d'un étrier qui est généralement désigné par le terme d'étrier anti-envol, du fait que sa fonction est d'éviter l'éjection vers le haut des barres antivibratoires. The device 37 is constituted in the form of a stirrup which is generally designated by the term anti-theft stirrup, because its function is to avoid the ejection upwards of the anti-vibration bars.

Sur les figures 8 et 9, on a représenté un étrier anti-envol 37 et ses moyens de fixation sur un dispositif de liaison de barres antivibratoires suivant l'invention. In Figures 8 and 9, there is shown a anti-theft stirrup 37 and its means of attachment to a device connecting anti-vibration bars according to the invention.

Sur la figure 8, on voit un ensemble de barres antivibratoires 35'a, 35'b, 35'c, 35'd et 35'e qui sont reliées entre elles par un dispositif de liaison 30' analogue au dispositif 30 représenté sur la figure 6. In Figure 8, we see a set of bars anti-vibration 35'a, 35'b, 35'c, 35'd and 35'e which are interconnected by a similar 30 'connecting device to the device 30 shown in FIG. 6.

Un étrier anti-envol 37 est fixé par l'extrémité de l'une de ses branches sur une entretoise 32'd du dispositif de liaison 30' disposé à l'extrémité de la rangée de barres antivibratoires. An anti-theft stirrup 37 is fixed by the end of one of its branches on a 32 'spacer of the device link 30 'arranged at the end of the row of anti-vibration bars.

L'étrier 37 peut être fixé à l'extrémité de sa seconde branche, à sa seconde extrémité (non représentée), sur une entretoise d'un dispositif de liaison identique au dispositif 30' et assurant la liaison des parties d'extrémité d'un ensemble de barres antivibratoires. The bracket 37 can be attached to the end of its second branch, at its second end (not shown), on a spacer of a connection device identical to the device 30 'and ensuring the connection of the end parts a set of anti-vibration bars.

Sur les figures 2A et 2B, l'étrier 37 permet d'assurer le maintien anti-envol de l'ensemble des barres antivibratoires. Les extrémités de l'étrier sont fixées dans deux entretoises de deux dispositifs de liaison suivant l'invention des extrémités 15'b des barres antivibratoires 15' introduites entre les nappes de tubes 14'. In FIGS. 2A and 2B, the bracket 37 allows ensure the anti-theft hold of all the bars anti-vibration. The ends of the stirrup are fixed in two spacers of two connecting devices according to the invention of the ends 15'b of the anti-vibration bars 15 'introduced between the plies of tubes 14'.  

Comme il est visible sur la figure 9, l'entretoise d'extrémité 32'd du dispositif de liaison 30' dans laquelle est fixée la branche de l'étrier 37 est prolongée par une patte de fixation 38 de l'étrier 37 dans laquelle une partie d'extrémité recourbée de l'étrier est introduite et fixée par une soudure 39. As shown in Figure 9, the spacer end 32 'of the connecting device 30' in which is fixed the branch of the stirrup 37 is extended by a fixing lug 38 of the stirrup 37 in which a curved end part of the stirrup is introduced and fixed by a weld 39.

On peut également utiliser une entretoise d'extrémité 32'd présentant une dimension supérieure aux autres entretoises, de manière à pouvoir être percée pour recevoir la partie d'extrémité de l'étrier 37. You can also use an end spacer 32'd with a dimension greater than other spacers, so that it can be drilled to receiving the end portion of the stirrup 37.

Le dispositif suivant l'invention permet donc de réaliser de manière simple et efficace la fixation des étriers anti-envol des barres antivibratoires, lors du montage du faisceau du générateur de vapeur. The device according to the invention therefore makes it possible to simple and efficient fixing of anti-theft stirrups of the anti-vibration bars, when assembly of the steam generator harness.

Le dispositif de calage suivant l'invention comportant des dispositifs de liaison constitués par des vis et des entretoises identiques permet donc de réaliser de manière simple et rapide la liaison d'un nombre quelconque de barres antivibratoires lors du montage du faisceau du générateur de vapeur, en utilisant uniquement des éléments modulaires ayant des dimensions standard. The wedging device according to the invention comprising connecting devices constituted by identical screws and spacers therefore allows for quickly and easily linking any number anti-vibration bars when mounting the steam generator harness, using only modular elements with standard dimensions.

Le dispositif de calage suivant l'invention permet de plus de réaliser une fixation efficace et simple des étriers anti-envol des barres antivibratoires. The wedging device according to the invention also allows for efficient and simple fixing anti-theft stirrups anti-vibration bars.

L'invention ne se limite pas au mode de réalisation qui a été décrit. The invention is not limited to the embodiment that has been described.

C'est ainsi que la vis et les entretoises des dispositifs de liaison des barres antivibratoires peuvent être réalisées sous une forme différente de celle qui a été décrite. This is how the screw and spacers of the anti-vibration linkage devices can be produced in a form different from that which been described.

L'invention s'applique dans le cas de tout générateur de vapeur ou échangeur de chaleur comportant un réseau régulier de tubes comportant des parties cintrées entre lesquelles sont intercalées des barres antivibratoires. The invention applies in the case of any generator steam or heat exchanger having a regular network of tubes with curved parts between which are inserted anti-vibration bars.

Claims (7)

  1. Device for antivibrational blocking of tubes of a heat exchanger including a bundle of tubes folded into a U, fixed at their ends in a tube plate arranged in parallel layers and whose juxtaposed bent parts opposite the tube plate constitute an assembly of substantially hemispherical shape termed the tube bend region, the blocking device including a set of antivibration bars (15, 15'; 25, 25'; 35a ... 35e) each interposed between the bent parts of two adjacent layers of tubes (14, 14'; 24) of the bundle and arranged in a substantially radial direction of the tube bend region, so as to have one end outside the tube bend region, and linkage means between the outer end parts of the antivibration bars arranged in a plurality of sets of at least two bars in which the bars are aligned along a straight row and include aligned through openings (26, 26'), the linkage means (20, 20'; 30, 30') including, for each of the sets of antivibration bars aligned along one row:
    a screw (21, 21'; 31, 31') having a head (21a) intended to bear on a first face of a first antivibration bar (25) at one of the ends of the row and including means (27) of locking in rotation with respect to the first antivibration bar (25) and a threaded rod (21b) engaged in the opening (26) of the first antivibration bar (25), so as to project on a second face of the first antivibration bar (25), opposite the first face,
    at least one spacer (22) having a longitudinal axis and a body whose length along the axis of the spacer is substantially equal to the separation between two successive bars (25, 25') of the row and including, along the axis of the body, a tapped opening (22a) over part of the length of the body, emerging at a first axial end of the body of the spacer (22) and a threaded rod (22b) in axial extension of the body, at its longitudinal end opposite the first end as well as an engaging surface (22c, 22b) on the outer surface of the body, and
    a tapped fastening element (23, 29) associated with a second antivibration bar (25') different from the first,
       the threaded rod (21b) of the screw (21) having a screw thread allowing it to be fastened by screwing in the tapped opening (22a) of the spacer (22), and the threaded rod (22b) of the spacer (22) having an identical screw thread allowing it to be fastened in the tapped opening of the fastening element (23, 29) or in a tapped spacer opening (22a).
  2. Device according to Claim 1, characterized in that the tapped fastening element (23) is a nut screwed onto the threaded rod (22b) of the spacer (22), bearing against the second antivibration bar (25') and connected by welding points (28, 36) to the threaded rod (22b) of the spacer (22).
  3. Device according to Claim 1, characterized in that the tapped fastening element (29) consists of the through opening of the second antivibration bar which is made in the form of a tapped opening to allow screwing of the rod (22a) of the spacer (22).
  4. Device according to any one of Claims 1 to 3, characterized in that it includes at least one means of linking a set of more than two aligned antivibration bars, comprising a screw (31), at least two identical spacers (32a, 32b, 32c, 32d) and a tapped fastening element (33).
  5. Device according to any one of Claims 1 to 4, characterized in that the head (21a) of the screw (21) includes a rotational locking means consisting of a cavity (27) with parallel edges of a width substantially equal to the width of an antivibration bar (25), in which the first antivibration bar (25) of the set of antivibration bars is housed.
  6. Blocking device according to any one of Claims 1 to 5, characterized in that in addition it includes at least one anti-liftoff retaining bar (37) in the shape of a staple, including two branches each fixed at its ends onto a spacer 22 of a linkage means of a set of antivibration bars.
  7. Use of a blocking device according to any one of Claims 1 to 6, in the case of a steam generator of a pressurized water nuclear reactor having a tube bundle arranged in a network with triangular cells.
EP94402249A 1993-10-20 1994-10-06 Device for antivibrationally securing tubes of a heat exchanger and use thereof Expired - Lifetime EP0654636B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312514A FR2711419B1 (en) 1993-10-20 1993-10-20 Device for anti-vibration wedging of tubes of a heat exchanger and use.
FR9312514 1993-10-20

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EP0654636A1 EP0654636A1 (en) 1995-05-24
EP0654636B1 true EP0654636B1 (en) 1998-05-13

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EP (1) EP0654636B1 (en)
KR (1) KR100358820B1 (en)
CN (1) CN1076462C (en)
DE (1) DE69410215T2 (en)
FR (1) FR2711419B1 (en)
TW (1) TW279233B (en)

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KR100409242B1 (en) * 2001-06-05 2003-12-18 한국원자력연구소 Anti-vibration structure and arrangement method of steam generator tubes of steam generator
US8572847B2 (en) * 2008-07-25 2013-11-05 Babcock & Wilcox Canada Ltd. Tube support system for nuclear steam generators
US20100116478A1 (en) * 2008-11-12 2010-05-13 Exxonmobil Research And Engineering Company Displaceable baffle for a heat exchanger and method for reducing vibration for the same
CN102161143A (en) * 2011-04-01 2011-08-24 上海电气核电设备有限公司 Auxiliary fixture for assembling shock-resistant strip used for steam generator pipe bundle
DE102011113788A1 (en) * 2011-09-20 2013-03-21 Friedrich Boysen Gmbh & Co. Kg Heat transfer assembly
CN102434874B (en) * 2011-12-15 2015-06-24 哈尔滨锅炉厂有限责任公司 Nuclear power horizontal high-pressure water supply heater and heating method
CN103868371B (en) * 2012-12-10 2016-09-28 中国核动力研究设计院 A kind of fin-tube heat exchanger
CN103871488A (en) * 2012-12-13 2014-06-18 中国核动力研究设计院 Anti-vibration bar structure for steam generator of pressurized water reactor (PWR) nuclear power plant
CN104956174A (en) * 2012-12-21 2015-09-30 特灵国际有限公司 Shell and tube heat exchanger
CN103317245B (en) * 2013-06-05 2015-08-19 上海电气核电设备有限公司 A kind of method of nuclear steam generator poling and anti-vibration strip welding equipment
CN106041397B (en) * 2016-07-11 2018-01-09 无锡市锡达电子科技有限公司 A kind of assembling fixture and assemble method of the heater of Stirling engine
CN111664492A (en) * 2020-07-14 2020-09-15 俞启鸿 Heat exchange station heating pipe network

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CN1076462C (en) 2001-12-19
FR2711419A1 (en) 1995-04-28
FR2711419B1 (en) 1996-02-02
KR950012027A (en) 1995-05-16
DE69410215D1 (en) 1998-06-18
EP0654636A1 (en) 1995-05-24
TW279233B (en) 1996-06-21
US5514250A (en) 1996-05-07
DE69410215T2 (en) 1998-10-29
CN1104321A (en) 1995-06-28
KR100358820B1 (en) 2003-02-05

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