EP0078728B1 - Schwingungsdämpfende Halterung für ein Rohrbündel, insbesondere für einen Dampferzeuger, und Verfahren zum Montieren dieser Halterung - Google Patents

Schwingungsdämpfende Halterung für ein Rohrbündel, insbesondere für einen Dampferzeuger, und Verfahren zum Montieren dieser Halterung Download PDF

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Publication number
EP0078728B1
EP0078728B1 EP82401941A EP82401941A EP0078728B1 EP 0078728 B1 EP0078728 B1 EP 0078728B1 EP 82401941 A EP82401941 A EP 82401941A EP 82401941 A EP82401941 A EP 82401941A EP 0078728 B1 EP0078728 B1 EP 0078728B1
Authority
EP
European Patent Office
Prior art keywords
tubes
strips
tube
undulations
support
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
Application number
EP82401941A
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English (en)
French (fr)
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EP0078728A1 (de
Inventor
Yves Fournier
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.)
Framatome Te Courbevoie Frankrijk
Original Assignee
Novatome SA
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Publication date
Application filed by Novatome SA filed Critical Novatome SA
Publication of EP0078728A1 publication Critical patent/EP0078728A1/de
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Publication of EP0078728B1 publication Critical patent/EP0078728B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • 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 present invention relates to a device intended to hold in place a set of tubes forming a bundle while minimizing the possibility of vibrations of these tubes.
  • This device can be applied in particular to the maintenance of a bundle of tubes constituting the water-steam circuit of a sodium-water type steam generator which is used in particular in nuclear power plants of the fast neutron type.
  • the invention also relates to the method of mounting such a device.
  • Such a problem of fixing a bundle of tubes is particularly important and delicate in the case of a steam generator of the sodium-water type in which the water-steam circuit consists of a bundle of tubes extending to inside an enclosure in which hot liquid sodium circulates.
  • the essential difficulty inherent in the sodium water type steam generator stems from the fact that the liquid sodium has excellent thermal conductivity, a quality highly appreciated but which has the drawback of inflicting violent temperature variations on the tube bundle during transient operation resulting in the significant differential expansions in these tubes.
  • FR-A-2.198.289 relates to a support for power transmission lines comprising two beams between lesguels are placed. at determined intervals, transverse spacers comprising two section pieces having recessed portions intended to receive the power transmission lines.
  • the undulations of the supports are adapted to the contour of the transport line to be supported, so that the contacts between the different elements are made according to surfaces so that there is significant wear and excessive matting of said transport lines.
  • these various tube bundle holding devices have other drawbacks, notably a relatively large complexity, a risk of deformation of the tubes when clamped by the support, a lack of control over the level of internal stresses developing in tubes due to their differential expansions and a lack of constancy over time of the fixing and anti-vibration characteristics.
  • the present invention relates to a device which maintains tubes with elasticity by means of metal strips.
  • the dimensions and shapes of these bands provide a point contact on the tubes which allows movements (rotations and axial sliding) of these tubes during operation.
  • the arrangement of the device helps to distance the frequency bands oDD the tubes could be excited on a common mode. 11 allows the flow of fluid around the tubes.
  • the elasticity of the bands makes it possible to accept differences in position during assembly.
  • the present invention relates to a device for holding a bundle of tubes housed in an enclosure in which a fluid circulates around these tubes arranged in rows comprising on each side of each row at least one pair of metal strips having each of the corrugations adapted to receive the tubes, the corrugations of the two strips arranged on either side of a row being located opposite so that the tubes are clamped under the action of clamping elements arranged between said undulations and clamping said strips towards each other.
  • each metal strip whose ends are capable of being fixed to the fixed parts of the enclosure has at the level of each corrugation in contact with a tube on the one hand in the longitudinal direction a greater radius of curvature that the radius of the tube and on the other hand, in the transverse direction a slight curvature continues so that the contact between each metal strip and the tube is established in a quasi-punctual zone.
  • the metal strips are made of steel with high elastic limit.
  • the upper part of a structure or enclosure of a steam generator which consists essentially of an external vertical cylindrical envelope 1 and of a central cylindrical tube 2 providing between an annular space.
  • Tubes 3 are housed in this annular space separating the tube 2 and the casing 1. Hot liquid sodium circulates in the annular space between the casing 1 and the tube 2 which confine the sodium stream. This current is parallel to the axis of cylinders 1 and 2 and goes from bottom to top. The sodium gives way in the heat to pressurized water which circulates in the tubes 3 and which then turns into vapor.
  • the tubes 3 are arranged thus wound in the greater part of the steam generator and their lower and upper ends open in a known manner outside the envelope 1 of the steam generator.
  • the tubes after having completed their winding phase 4 are bent so as to form the parts 5 extending longitudinally and all located along radii 9a and 9b distributed regularly in the steam generator.
  • the invention particularly relates to the devices 7 and 8 serving for maintaining and damping the vibrations of the ends of the tubes 3.
  • the device 7 is arranged at the longitudinal parts of the tubes 5 and the device 8-farthest from the beam is disposed pre lyres 6.
  • the beam holding devices are shown in plan view, and in FIG. 3 is shown, in top view, the device for holding the beams. It is noted that the holding devices of these two types are constructed in an entirely similar manner.
  • Each device comprises strips of sheet metal of constant thickness 7a, 7b, 8a, 8b, which each form corrugations 16 adapted to the tubes and between which zones 17 extend.
  • the strips extend transversely to the tubes 5 - and perpendicularly with sodium current and they are mounted in pairs on either side of each row 9a, 9b of tubes 5 so as to grip the tubes as in a collar and to hold them in place.
  • each of these zones 17 are provided orifices through which pass bolts 19, 21 intended to bring the metal strips 7a and 7b together so as to cause the zones 16 of these metal strips to pinch the tubes and thus obtain a holding in place of all the tubes, however, allowing a certain elasticity in the assembly as well as a certain longitudinal sliding of the tubes due to the differential dilststions and a certain damping of the vibrations in the whole of the tube bundle.
  • Each metal strip is applied against the tubes on one side only. In this way two adjacent metal strips applied against the tubes of two adjacent rows are separated and provide a space for the circulation of sodium.
  • the ends of the two strips 7a, 7b mounted on either side of the same row of tubes are joined together.
  • the ends of the strips associated with the different rows are joined together.
  • the ends of the bands are fixed by known means to circular parts 12, 13, 14, 15 which are integral with components 1 and 2 Ce the resin.
  • the force of pinching the tubes must be strong enough to be effective, without, however, causing the matting or nicking of these tubes.
  • 11 is moreover intended, for this purpose, to give the metal strips, at the pinching zones 16 a slight curvature in the transverse direction, as can be seen in FIG. 5, so that the lateral parts of the tape are slightly away from the tube on which the tape comes into contact, and that only the part Central 20 of the strip is in contact with the tube.
  • the tube parts 5 do not occupy all of the possible locations on the different radii 9a, 9b, etc. This is of course only linked to the method of construction of this steam generator which has been taken as an exemplary embodiment. We therefore see, in Figures 1 and 2, locations 10 which are not occupied by one of the sections 5 of the tubes. As the distribution of the tubes 5 on spoke 9 is different for turns these spokes, instead of constituting different metal support plates adapted to each of the rows of tubes arranged on the different rents adapted to each of the rows of tubes arranged on the various spokes 9a , 9b. etc, the metal strips have been constructed all identical, of corrugated shape and the locations without tubes are occupied by cylindrical parts of diameter equal to that of the tubes. In FIG. 4, which is an enlarged side view of FIG. 2, there are such cylindrical parts 11 intended to replace the missing tubes 5.
  • a suitable steel is an austenitic alloy steel with structural hardening preferably comprising titanium and aluminum.
  • Such a steel is entirely suitable for the use which is made of it here in a steam generator of the sodium-water type because it has both a high elastic limit comparable to that of hardened steel and a high coefficient of elongation or a high ductility which is the characteristic of stainless steels. It can therefore maintain at 525 ° C. This even more a high elastic stress without practically any creep, even after a relatively long time.
  • the invention also relates to the method of mounting the antivibration support device described above. It is in fact important that the clamping force of the tubes which is established at the zones 20 of the metal strips has a substantially constant value for all the tubes. This pinching force is achieved by screwing the bolts 19.
  • the assembly process specific to the invention consists in placing the metal strips 7a and 7b, or 8a and 8b, on either side of the tubes.

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)
  • Supports For Pipes And Cables (AREA)

Claims (5)

1. Halterung für ein Rohrbündel (5), das in einem Behälter (1, 2) angeordnet ist, in dem ein Fluid um diese in Reihen (9a, 9b) angeordneten Rohre zirkuliert und der zu beiden Seiten jeder Reihe mindestens ein Paar Metallbänder (7a, 7b, 8a, 8b) aufweist, die jeweils zur Aufnahme der Rohre angepaßte Wellen (16) aufweisen, wobei die Wellen zweier zu beiden Seiten einer Reihe angeordneter Bänder so gegenüber angeordnet sind, daß die Rohre unter Einwirkung von Klemmelementen (19,21) geklemmt werden, wobei die Klemmelemente zwischen den Wellen angeordnet sind und die Bänder aufeinander zuziehen, dadurch gekennzeichnet, daß jedes Metallband, dessen Enden an den festen Teilen des Behälters befestigt werden können, auf der Höhe einer jeden mit einem Rohr (5) in Kontakt stehenden Welle (16) einerseits in Längsrichtung einen Krümmungsradius (R1), der größer als der Radius (R2) des Rohrs ist und andererseits in Querrichtung eine leichte kontinuierliche Krümmung (20) aufweist, derart, daß der Kontakt zwischen jedem Metallband und dem Rohr in einer quasi punktuellen Zone erfolgt.
2. Halterung nach Anspruch 1, daurch gekennzeichnet, daß die gewellten Metallbänder (7a, 7b, 8a, 8b) aus Stahl mit hoher Elastizitätsgrenze bestehen.
3. Halterung nach Anspruch 2, dadurch gekennzeichnet, daß der Stahl ein austentischer Stahl mit stuktureller Härtung ist.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß bei jedem gewellten Metallband alle nach innen gekrümmte Wellen (16) in Richtung der Rohre mit einem Rohr (5) in Kontakt stehen oder falls ein solches fehlt, mit einem Ersatzteil (11) in Zylinderform mit dem gleichen Durchmesser wie der der Rohre.
5. Verfahren zum Anbringen einer Halterung für ein Rohrbündel nach Anspruch 1, dadurch gekennzeichnet, daß ein gewelltes Band (7a, 7b, 8a, 8b) jeweils auf jeder Seite der zu immohilisierenden Rohrreihe angelegt wird, auf den gewellten Bändern befestigte Gewindestifte (19, 21) verschraubt werden bis die gewellten Bänder in einer Stellung sind, in der das Klemmen der Bänder auf den Rohren beginnt, und daß die Verschraubung der Gewindestifte mit einem konstanten vorbestimmten Drehwinkel fortgesetzt wird, so daß in den Bändern zwischen jedem Rohr eine konstante vorbestimmte Durchbiegung emtsteht.
EP82401941A 1981-10-23 1982-10-22 Schwingungsdämpfende Halterung für ein Rohrbündel, insbesondere für einen Dampferzeuger, und Verfahren zum Montieren dieser Halterung Expired EP0078728B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8119980A FR2515330B1 (fr) 1981-10-23 1981-10-23 Dispositif de maintien antivibratoire d'un faisceau de tubes notamment pour generateur de vapeur, et procede de montage d'un tel dispositif
FR8119980 1981-10-23

Publications (2)

Publication Number Publication Date
EP0078728A1 EP0078728A1 (de) 1983-05-11
EP0078728B1 true EP0078728B1 (de) 1986-02-26

Family

ID=9263346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401941A Expired EP0078728B1 (de) 1981-10-23 1982-10-22 Schwingungsdämpfende Halterung für ein Rohrbündel, insbesondere für einen Dampferzeuger, und Verfahren zum Montieren dieser Halterung

Country Status (5)

Country Link
US (1) US4589618A (de)
EP (1) EP0078728B1 (de)
JP (1) JPS5892701A (de)
DE (1) DE3269448D1 (de)
FR (1) FR2515330B1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329202A1 (de) * 1983-08-12 1985-02-21 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Profilrohr-waermetauscher
US4576228A (en) * 1984-02-03 1986-03-18 The United States Of America As Represented By The United States Department Of Energy Minimum wear tube support hole design
US4902468A (en) * 1987-10-21 1990-02-20 Westinghouse Electric Corp. Control rod support having planar wear surfaces
ATE84862T1 (de) * 1989-11-24 1993-02-15 Hydac Technology Gmbh Befestigungssystem.
JPH0377884U (de) * 1989-11-29 1991-08-06
US5213155A (en) * 1992-04-23 1993-05-25 The Atlantic Group, Inc. Method and apparatus for multiple locking a single row of heat exchanger tubes
GB0106308D0 (en) * 2001-03-14 2001-05-02 Kvaerner Process Tech Ltd Apparatus
US7048041B2 (en) * 2003-07-25 2006-05-23 Stone & Webster Process Technology, Inc. Systems and apparatuses for stabilizing reactor furnace tubes
US7073575B2 (en) 2004-09-09 2006-07-11 Exxonmobil Research And Engineering Company Reduced vibration tube bundle device
PT2088371E (pt) * 2007-07-18 2014-08-04 Babcock & Wilcox Power Generat Quadro de suporte estrutural para permutador de calor tubular
KR101266673B1 (ko) * 2007-11-01 2013-05-28 에스케이이노베이션 주식회사 수증기 개질방식에 의한 수소발생장치
JP6108107B2 (ja) * 2013-07-22 2017-04-05 株式会社Ihi 熱交換器及び熱交換器の製造方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1315225A (en) * 1919-09-09 Chester b
DE216732C (de) *
US1262763A (en) * 1917-07-16 1918-04-16 John W Farley Pipe-hanger.
US2161019A (en) * 1937-06-28 1939-06-06 Joseph A Coy Heat exchanger
GB685848A (en) * 1950-01-24 1953-01-14 Vickers Electrical Co Ltd Improvements relating to the construction of tubular heat exchangers
US3045981A (en) * 1958-05-09 1962-07-24 Hendrickson Machine Company Baffle plate
US3385545A (en) * 1966-02-09 1968-05-28 Robert P. Patton Conduit hanging apparatus
US3526934A (en) * 1968-08-20 1970-09-08 David H Owen Sr Interlocking spacers
CH557972A (de) * 1972-08-31 1975-01-15 Hennig Kurt Energiefuehrungskette.
US4156299A (en) * 1973-11-21 1979-05-29 The Detroit Edison Company Heat exchanger tube ferrule
JPS5240061A (en) * 1975-09-26 1977-03-28 Hitachi Ltd Semiconductor device and process for production of same
FR2336621A1 (fr) * 1975-12-22 1977-07-22 Fives Cail Babcock Support de tubes, notamment pour echangeur de chaleur
NL7810027A (nl) * 1978-10-04 1980-04-09 Stork Koninklijke Maschf Natriumstoomgenerator met een binnen een van toe- en afvoerstompen voorzien vat gelegen pijpenbundel.
JPS56904A (en) * 1979-06-19 1981-01-08 Doryokuro Kakunenryo Device for supporting heat transfer tube
US4359088A (en) * 1980-11-21 1982-11-16 The Babcock & Wilcox Company Steam generator tube supports

Also Published As

Publication number Publication date
FR2515330A1 (fr) 1983-04-29
DE3269448D1 (en) 1986-04-03
JPS5892701A (ja) 1983-06-02
FR2515330B1 (fr) 1985-12-27
EP0078728A1 (de) 1983-05-11
US4589618A (en) 1986-05-20

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