EP0467755A1 - Vorrichtung für schwingungsneutralisierendes Festsetzen von Wärmetauscherrohren - Google Patents

Vorrichtung für schwingungsneutralisierendes Festsetzen von Wärmetauscherrohren Download PDF

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Publication number
EP0467755A1
EP0467755A1 EP91401914A EP91401914A EP0467755A1 EP 0467755 A1 EP0467755 A1 EP 0467755A1 EP 91401914 A EP91401914 A EP 91401914A EP 91401914 A EP91401914 A EP 91401914A EP 0467755 A1 EP0467755 A1 EP 0467755A1
Authority
EP
European Patent Office
Prior art keywords
bars
tubes
vibration
vibration bars
bun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91401914A
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English (en)
French (fr)
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EP0467755B1 (de
Inventor
Gérard Boula
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 EP0467755A1 publication Critical patent/EP0467755A1/de
Application granted granted Critical
Publication of EP0467755B1 publication Critical patent/EP0467755B1/de
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
    • 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 an anti-vibration wedging device for tubes of a heat exchanger, such as a steam generator.
  • the steam generators in particular the steam generators of nuclear pressurized water reactors, comprise tubes bent in U having two branches crimped at their ends in a tubular plate.
  • the tubes are arranged in adjacent flat layers.
  • the curved parts of the bundle tubes which are juxtaposed at its upper part have radii of curvature different from each other and are placed adjacent to form a structure of substantially hemispherical shape called a bun.
  • the circulation of the fluid in contact with the tubes can cause vibrations which are liable to cause damage to these tubes if they are not maintained effectively.
  • the right part of the tubes is engaged in spacers located at regular distances from each other according to the height of the beam. These straight parts are therefore effectively maintained by rigid elements.
  • the curved parts of the tubes of the bundle constituting the bun must also be maintained and generally used for this are spacer bars which are interposed each between two plies of adjacent tubes of the bundle and arranged in substantially radial directions of the bun. These spacer bars are generally connected two by two in an articulated manner at one of their ends arranged towards the inside of the bun and placed in an angular manner to form V-shaped structures.
  • the outer ends of the antivibration bars opposite their articulated ends project from the tubes constituting the outer layer of the bun and are interconnected by connecting means ensuring the maintenance of the antivibration bars.
  • the object of the invention is therefore to propose a device for anti-vibration wedging of tubes of a steam generator comprising a bundle of tubes bent in a U fixed at their ends in a tubular plate, arranged in adjacent layers and whose curved parts opposite the tubular plate and juxtaposed constitute a set of substantially hemispherical shape called a bun, the wedging device comprising a set of anti-vibration bars each interposed between the curved portions of two adjacent plies of bundle tubes and arranged in a substantially radial direction of the bun , so as to have one end outside the bun and a set of connecting means between the outer end parts of the anti-vibration bars, this wedging device having a small footprint, which can be placed very quickly and very easily, too good in the case of a new fa generator briquetted in the factory than in the case of a used steam generator during maintenance and repair and allowing to ensure a very good alignment and a precise adjustment of the spacing of the anti-vibration bars.
  • the outer ends of the anti-vibration bars arranged in a plurality of sets of at least two bars in which the bars are aligned have aligned through openings, one of which is threaded
  • a means of connecting the ends of the anti-vibration bars is associated with each of the sets of bars and each of the connecting means is constituted by a pin having a threaded portion at the one of its ends and one end opposite to the threaded part constituting a screwing and unscrewing head and at least one spacer of tubular shape whose length corresponds substantially to the diameter of the tubes of a sheet, the pin being inserted into the aligned openings of a set of anti-vibration bars and in the bore of at least one spacer interposed between two anti-vibration bars, screwed into the threaded opening and blocked by a rotation blocking means.
  • Figure 1 is an elevational view in partial section of a steam generator of a pressurized water nuclear reactor comprising anti-vibration bars for holding the tubes of the bundle.
  • Figure 2 is a sectional view of a wedging device according to the invention, in its part located above the bun of the steam generator.
  • FIG. 3 is a view along 3 of FIG. 2.
  • Figure 4 and a view similar to the view of Figure 3 relating to a first alternative embodiment of a wedging device according to the invention.
  • Figure 5 is a view similar to the view of Figure 3 on a second alternative embodiment of a timing device according to the invention.
  • the casing 2 contains the bundle of tubes of the steam generator constituted by tubes 5 bent in a U and comprising at their upper part, semi-circular hangers constituting the bun of the steam generator.
  • the straight parts 5a of the bundle tubes are crimped at their ends in the tube plate 3, so as to open into a water box 7 in two parts separated by a partition 8.
  • the pressurized water from the nuclear reactor enters one of the parts of the water box 7 through an inlet pipe 6a, flows through the tubes of the bundle then exits through an outlet pipe 6b.
  • the bundle of tubes 5 is surrounded by a bundle envelope 9 making it possible to channel the feed water entering the envelope of the steam generator by an inlet pipe 11.
  • the feed water of the steam generator circulates first from top to bottom in the annular space located around the bundle envelope 9, then from bottom to top in contact with the tubes 5 of the bundle so as to heat up then to vaporize and to come out in the form steam through the upper tube 12 of the steam generator.
  • the upper part of the bundle of tubes called a bun is formed by the juxtaposition of semicircular hangers arranged in successive layers in which the radii of the hangers are decreasing from the outside to the inside of the beam.
  • the various successive layers of tubes of the bundle parallel to the central layer shown in FIG. 1 comprise external hangers of decreasing diameters, so that the upper part of the bundle or bun constitutes a substantially hemispherical assembly.
  • the straight part 5a of the tubes 5 is held by spacer plates 10 which prevent the tubes from vibrating when the steam generator is in operation, under the effect of the circulation of exchange fluids.
  • anti-vibration bars 15 formed in the form of compasses articulated at their inner end 15a and introduced between the layers of successive tubes, at the level of the hangers.
  • the outer ends 15b of the branches of the anti-vibration bars project from the upper surface of the bun and allow the fixing of the anti-vibration bars.
  • any branch of an assembly 15 in the form of a compass will be designated by anti-vibration bars.
  • FIG 2 there is shown a section of the curved part of two tubes 16a and 16b of the bundle of the steam generator arranged in two adjacent layers and placed at the outer part of these layers.
  • the external tubes such as 16a and 16b of the successive layers of the bundle of the steam generator define the external surface of the hemispherical bun.
  • an element 17 of a device anti-vibration wedging according to the invention disposed in the bun of the steam generator.
  • the element 17 of the wedging device comprises a first anti-vibration bar 18a interposed between the sheet of tubes in which the tube 16a is placed and an adjacent sheet of tubes, a second anti-vibration bar 18b interposed between the sheet of tubes in which the tube is placed tube 16a and the adjacent ply of tubes in which the tube 16b is placed, a connecting pin 20 and a spacer 21.
  • the anti-vibration bars 18a and 18b are placed in positions aligned along an axis 22 perpendicular to the axis of the tubes 16a and 16b.
  • the end portions of the antivibration bars 18a and 18b remaining projecting outside the bun that is to say relative to the tubes 16a and 16b, after their positioning in the bun, are crossed by cylindrical openings 23 and 24 having for axis the alignment axis 22 of the two anti-vibration bars 18a and 18b.
  • the opening 23 is a smooth cylindrical opening while the opening 24 is tapped, so as to allow the screwing of a threaded part 20a of the spindle 20.
  • the end of the spindle 20 opposite its threaded end 20a constitutes a head 20b, the section of which can be, for example, of hexagonal shape.
  • the head 20b allows the screwing and unscrewing of the spindle 20 to be carried out, using an appropriate tool.
  • the spacer 21 has a tubular shape, the bore of this spacer having a diameter substantially equal to the diameter of the openings 23 and 24.
  • a plate 25 cut from a steel sheet or strip is fixed by a peripheral weld line 26 to the outer surface of the spacer. 21.
  • the welding of the plate 25 on the spacer 21 can be carried out by the TIG method.
  • the length in the axial direction of the spacer 21 is equal to the average diameter of the tubes constituting the sheet in which the tube 16a is placed.
  • the anti-vibration bars 18a and 18b and in particular their projecting end parts are placed in alignment with one another, in the direction 22 perpendicular to the axis of the tubes 16a and 16b.
  • the openings 23 and 24 are then aligned, so that the axis 22 constitutes their common axis.
  • the spacer 21 is interposed between the anti-vibration bars 18a and 18b, the bore of this tubular spacer being placed in alignment with the openings 23 and 24.
  • the stop plate 25, folded at 90 °, has a folded part 25a crossed by an opening 25b which is placed in alignment with the opening 23.
  • the pin 20 is introduced into the openings 25b and 23 and into the bore of the spacer 21 and then screwed inside the threaded opening 24 of the spacer 18b, using a clamping tool.
  • the pin 20 provides the connection between the end parts of the anti-vibration bars 18a and 18b and the tightening of these anti-vibration bars on the end surfaces of the spacer 21 whose length corresponds to the average diameter of the tubes of the sheet comprising the tube 16a.
  • the spacing of the antivibration bars 18a and 18b is thus fixed at a value making it possible to optimize the conditions of the antivibration setting of the tubes of the sheet comprising the tube 16a.
  • the spindle 20 After tightening the spindle 20, it can be secured against rotation by folding the end of the part 25a of the plate 25 above the head 20b of the spindle, as indicated by the arrow 27. In this way, the spindle 20 is not liable to loosen and the connecting elements of the anti-vibration bars 18a and 18b are not liable to come off, under the effect of vibrations, in the steam generator in service.
  • the whole anti-vibration wedging device of the bundle tubes arranged in the bun is thus perfectly held in place and ensures effective wedging of the various plies of tubes in their curved part.
  • the anti-vibration bars aligned 28a to 28e have a projecting part relative to the tubes 29a, 29b, ..., located furthest outside in the layers of successive tubes.
  • the anti-vibration bars 28a, ..., 28e are crossed by openings having the axis 32 as their common axis.
  • the aligned openings passing through the anti-vibration bars are formed by smooth holes, with the exception of the opening passing through the last anti-vibration bar in the row (the bar 28e in FIG. 4) which is constituted by a tapped hole.
  • the anti-vibration bars 28a, ..., 28e are interconnected by their projecting end part, by means of a pin 30 inserted inside the aligned openings of the bars anti-vibration and inside the bores of the spacers 31a, 31b, 31c and 31d arranged between the successive anti-vibration bars 28a, ..., 28e.
  • the pin 30 has a threaded end which is screwed inside the tapped hole of the anti-vibration bar 28e, so as to ensure the connection between the anti-vibration bars and the tightening of these anti-vibration bars against the spacers.
  • the spindle 30 has a head 30b making it possible to screw or even unscrew the spindle 30.
  • the spacers 31a, 31b, 31c and 31d have a length in the axial direction 32 equal to the average diameter of the tubes, respectively 29a, 29b, 29c, 29d constituting the plies of successive tubes maintained by the spacers 28a, ..., 28e.
  • the blocking in rotation of the spindle 30 can be carried out in an identical manner to the blocking of the spindle 20 shown in FIG. 2.
  • the spacer 31a located closest to the head 30b of the spindle 30 comprises a stop plate welded on its external surface, this plate being folded after tightening of the spindle on the head 30b.
  • the ends of the antivibration bars 33a, 33b and 33c projecting from the tubes 34a and 34b located outside of successive layers of tubes are in offset positions, due to the relative arrangement of the tubes 34a and 34b of the two successive layers.
  • the outer tube 34a of the first ply has a radius of curvature at its arch less than the radius of curvature of the curved part of the tube 34b, these differences in radius of curvature resulting from the geometry of the bun of the steam generator.
  • the projecting part of the anti-vibration bar 33a is set back relative to the projecting parts of the anti-vibration bars 33b and 33c.
  • the outer end parts of the antivibration bars 33a, 33b and 33c can be connected by connecting devices 35a and 35b similar to the devices 17 shown in FIGS. 2 and 3.
  • the anti-vibration bar 33a is traversed by a smooth opening and the bar 33b by a tapped opening, these openings having a common axis 36a.
  • the device 35a comprising a pin 38 and a spacer 37 makes it possible to make the connection between the end parts of the bars 33a and 33b aligned in the direction of the axis 36a.
  • the bar 33b is also crossed by a smooth opening, in its part located towards the outside, relative to the tapped opening aligned along the axis 36a.
  • the bar 33c is pierced with a tapped opening having the axis 36b as a common axis with the smooth opening passing through the bar 33b.
  • the device 35b comprising a pin and a spacer makes it possible to ensure the connection between the bars 33b and 33c.
  • the wedging device according to the invention has the advantage of making the connection between the antivibration bars inserted between the layers of tubes inside the bun of the steam generator, without requiring welding. Any suitable material can therefore be used to form the anti-vibration bars which are not affected by the welding operations.
  • the device according to the invention makes it possible to ensure very good alignment of the anti-vibration bars arranged in a row, thanks to the use of a connecting element constituted by a pin introduced into aligned openings of the anti-vibration bars.
  • the device according to the invention comprises connecting elements between the antivibration bars whose volume is relatively small.
  • the device according to the invention makes it possible to wedge the tubes with a spacing between the anti-vibration bars maintained at a fixed value.
  • the anti-vibration wedging device according to the invention can be used in the case of any heat exchanger comprising bent tubes arranged in sheets that are parallel to each other.

Landscapes

  • 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)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
EP91401914A 1990-07-20 1991-07-09 Vorrichtung für schwingungsneutralisierendes Festsetzen von Wärmetauscherrohren Expired - Lifetime EP0467755B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9009331A FR2664965B1 (fr) 1990-07-20 1990-07-20 Dispositif de calage antivibratoire de tubes d'un echangeur de chaleur.
FR9009331 1990-07-20

Publications (2)

Publication Number Publication Date
EP0467755A1 true EP0467755A1 (de) 1992-01-22
EP0467755B1 EP0467755B1 (de) 1994-11-02

Family

ID=9398962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91401914A Expired - Lifetime EP0467755B1 (de) 1990-07-20 1991-07-09 Vorrichtung für schwingungsneutralisierendes Festsetzen von Wärmetauscherrohren

Country Status (7)

Country Link
US (1) US5127469A (de)
EP (1) EP0467755B1 (de)
JP (1) JPH05157482A (de)
DE (1) DE69104925T2 (de)
ES (1) ES2064947T3 (de)
FR (1) FR2664965B1 (de)
ZA (1) ZA915684B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639741A1 (de) * 1993-08-20 1995-02-22 Framatome Wärmetauscher mit Haltevorrichtung für zwischen die Rohre eingelegte Dämpfungsstangen

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2711419B1 (fr) * 1993-10-20 1996-02-02 Framatome Sa Dispositif de calage antivibratoire de tubes d'un échangeur de chaleur et utilisation.
US5388638A (en) * 1993-12-28 1995-02-14 Phillips Petroleum Company Rod baffle heat exchanger
FR2731508B1 (fr) * 1995-03-09 1997-05-09 Framatome Sa Echangeur de chaleur, a tubes en u, equipe d'un dispositif de calage des tubes, antivibratoire et anti-envol
US6244330B1 (en) 1998-11-16 2001-06-12 Foster Wheeler Corporation Anti-vibration ties for tube bundles and related method
US6772832B2 (en) 2002-04-23 2004-08-10 Babcock & Wilcox Canada, Ltd. Heat exchanger tube support bar
US9697919B2 (en) * 2010-12-29 2017-07-04 Westinghouse Electric Company, Llc Anti-vibration tube support plate arrangement for steam generators
US8479392B2 (en) 2011-06-02 2013-07-09 Westinghouse Electric Company Llc Anti-vibration bar clamping tool and method
WO2015061641A1 (en) * 2013-10-24 2015-04-30 Holtec International Steam generator for nuclear steam supply system
US20140116360A1 (en) * 2012-10-31 2014-05-01 Westinghouse Electric Company Llc Method and apparatus for securing tubes in a steam generator against vibration
WO2019150180A1 (en) 2018-02-02 2019-08-08 Bwxt Canada Ltd. Alternating offset u-bend support arrangement
CN113983854B (zh) * 2021-10-22 2022-10-28 中国原子能科学研究院 用于反应堆内热交换器的支承结构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH494367A (de) * 1968-09-20 1970-07-31 Siemens Ag Halterung von U-Rohrbündeln bei Dampferzeugern
EP0214812A2 (de) * 1985-09-06 1987-03-18 Westinghouse Electric Corporation Apparat zum Einbauen einer schwingungsneutralisierenden Stange

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US3007697A (en) * 1959-03-06 1961-11-07 Miller Printing Machinery Co Sheet feeder
US3026858A (en) * 1959-09-23 1962-03-27 Selas Corp Of America Tube support
US3212567A (en) * 1962-05-08 1965-10-19 Combustion Eng Anti-vibration support means
US3575236A (en) * 1969-08-13 1971-04-20 Combustion Eng Formed plate tube spacer structure
IT1048461B (it) * 1975-10-17 1980-11-20 Breda Termomeccanica Spa Perfezionamenti alla costruzione di una griglia per supporto tubi
US4286366A (en) * 1977-12-23 1981-09-01 Phillips Petroleum Company Method for the construction of a baffled heat exchanger
US5005637A (en) * 1986-11-05 1991-04-09 Phillips Petroleum Company Heat exchanger U-bend tube support

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH494367A (de) * 1968-09-20 1970-07-31 Siemens Ag Halterung von U-Rohrbündeln bei Dampferzeugern
EP0214812A2 (de) * 1985-09-06 1987-03-18 Westinghouse Electric Corporation Apparat zum Einbauen einer schwingungsneutralisierenden Stange

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639741A1 (de) * 1993-08-20 1995-02-22 Framatome Wärmetauscher mit Haltevorrichtung für zwischen die Rohre eingelegte Dämpfungsstangen
FR2709174A1 (fr) * 1993-08-20 1995-02-24 Framatome Sa Echangeur de chaleur comportant des moyens de maintien de barres antivibratoires intercalés entre les tubes du faisceau de l'échangeur.
US5447191A (en) * 1993-08-20 1995-09-05 Framatome Heat exchanger including means for holding antivibration bars interposed between the tubes of the bundle of the exchanger

Also Published As

Publication number Publication date
ZA915684B (en) 1993-02-24
FR2664965B1 (fr) 1992-11-06
DE69104925D1 (de) 1994-12-08
US5127469A (en) 1992-07-07
JPH05157482A (ja) 1993-06-22
ES2064947T3 (es) 1995-02-01
FR2664965A1 (fr) 1992-01-24
EP0467755B1 (de) 1994-11-02
DE69104925T2 (de) 1995-03-16

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