EP0735336A2 - Dispositif d'espacement en forme de grille - Google Patents

Dispositif d'espacement en forme de grille Download PDF

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Publication number
EP0735336A2
EP0735336A2 EP96104809A EP96104809A EP0735336A2 EP 0735336 A2 EP0735336 A2 EP 0735336A2 EP 96104809 A EP96104809 A EP 96104809A EP 96104809 A EP96104809 A EP 96104809A EP 0735336 A2 EP0735336 A2 EP 0735336A2
Authority
EP
European Patent Office
Prior art keywords
ring
bars
lattice
spacer according
outer ring
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.)
Withdrawn
Application number
EP96104809A
Other languages
German (de)
English (en)
Other versions
EP0735336A3 (fr
Inventor
Zvonimir Dipl.-Ing. Sterk
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0735336A2 publication Critical patent/EP0735336A2/fr
Publication of EP0735336A3 publication Critical patent/EP0735336A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F28F9/0135—Auxiliary supports for elements for tubes or tube-assemblies formed by grids having only one tube per closed grid opening

Definitions

  • the invention relates to a grid-shaped spacer for guiding and holding tubes of a tube bundle, in particular in a steam generator of a pressurized water reactor system.
  • these pipes In order to avoid vibrations of the pipes in these heat exchangers, these pipes must be guided and supported by spacers. It must be ensured that the pipes are kept at a predetermined distance from one another and that at the same time the flow of the liquid to be evaporated and surrounding the pipes is not too much impeded. Different thermal expansion coefficients of the individual components must also be taken into account.
  • the spacer consists of a large number of individual parts, so that, on the one hand, production is complex and, on the other hand, there is a risk that small parts will come loose during operation and move loosely around the tube bundle.
  • the invention has for its object to reduce the number of individual parts required, to simplify production and, moreover, to loosen individual parts largely prevent from the grid-shaped spacer.
  • ends of bars are inserted into slots in a one-piece central ring, that the cross section of the central ring is surrounded on three sides by an outer, cross-sectionally C-shaped ring and that the outer ring above and below each has a web projecting in the direction of the middle ring, which engages in a groove opposite it in an end face of the middle ring and in notches in lattice bars.
  • Advantageous developments of the invention consist in that the bolts as well as the receiving holes in the area of contact between the two parts of the outer ring have a larger diameter than at their ends, which are inseparably connected, for example by welding, brazing or deforming, to the outer ring are. Gaps are provided between the middle and the outer ring and between its webs and the grooves and the notches in the radial direction, which gaps are at least equal to the changes in length caused by thermal expansion.
  • a very advantageous embodiment of the middle ring is to give its cross-section the shape of a T lying on the side, the two short profile legs having the slots for receiving the lattice bars and wherein the middle profile leg extends in the lattice plane in the direction of the outer ring.
  • the bars are first glued into the radial slots in the middle ring, then, after the adhesive connection has hardened, at least one circumferential groove in the middle ring and notches are worked into the bars, for example by milling or turning, and the two parts of the outer ring are inserted with their web into the groove and connected to one another by the bolts.
  • the lattice-shaped spacer designed in accordance with the invention can be produced in a very advantageous manner from comparatively few and, moreover, very simple individual parts, which, due to its structural design, also reliably prevents individual parts from falling out of the overall arrangement of the spacer even if individual fastening points break.
  • Lattice bars 1 in an upper level and lattice bars 2 in a lower level of a spacer form an acute angle of preferably 60 °.
  • the bars 1 and 2 thereby form a plurality of diamonds, each of which one of several thousand tubes, not shown, of a tube bundle in a heat exchanger, in particular in the steam generator of a pressurized water reactor system, comprises, guides and supports. All bars 1 and 2 are made of upright metal strips in the grid with a ratio of thickness to width such as 1: 3 to 1: 8.
  • the middle ring can have a web (not shown) projecting radially outwards, the thickness of which is approximately equal to the distance between the bottom of the upper slots and the bottom of the lower slots. Through this web, the middle ring 3 is then given a cross section in the form of a large T. lying on the side.
  • the middle ring 3 with the ends of the bars 1 and 2 received by it is surrounded by an outer ring with a C-shaped cross section.
  • This outer ring is composed of a lower part 4 and an upper part 5.
  • Parts 4 and 5 are preferably identical to one another and are held together by bolts 6, the ends of which are welded to parts 4 and 5. Instead of welding, the ends of the bolts 6 can also be fixed by brazing or upsetting (riveting).
  • holes provided for receiving the bolts 6 have an expansion 7 on the side facing the other part 5 or 4, in which a reinforcement 8 of the received bolt 6 lies. This prevents a bolt 6 from falling out of the outer ring at one or both ends after its attachment has broken.
  • the middle ring is machined after the inclusion of the bars 1 and 2 together with these on its end faces and on its outer circumference.
  • the end faces of the middle ring 3 are provided with grooves 9, into which webs 10 of the outer ring engage.
  • Machining is preferably carried out on a carousel lathe.
  • the final dimensions of the middle ring 3 and the outer ring are coordinated so that there is radial play with gaps 11 between them and that in the axial direction of the groove bottom 9 of the middle ring 3 and the web 10 of the outer ring lie snugly on one another.
  • the middle ring 3 and the bars 1 and 2 are made of austenitic and the outer ring of ferritic material.

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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)
EP96104809A 1995-03-27 1996-03-26 Dispositif d'espacement en forme de grille Withdrawn EP0735336A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995111265 DE19511265A1 (de) 1995-03-27 1995-03-27 Gitterförmiger Abstandshalter
DE19511265 1995-03-27

Publications (2)

Publication Number Publication Date
EP0735336A2 true EP0735336A2 (fr) 1996-10-02
EP0735336A3 EP0735336A3 (fr) 1997-07-02

Family

ID=7757911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104809A Withdrawn EP0735336A3 (fr) 1995-03-27 1996-03-26 Dispositif d'espacement en forme de grille

Country Status (2)

Country Link
EP (1) EP0735336A3 (fr)
DE (1) DE19511265A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747414C1 (de) * 1997-10-27 1999-03-18 Siemens Ag Halterungsvorrichtung für Dampferzeugergitter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2316133C2 (de) * 1973-03-30 1983-11-17 Siemens AG, 1000 Berlin und 8000 München Rohrbündelwärmetauscher
IT1038778B (it) * 1975-06-09 1979-11-30 Breda Termomeccanica Spa Methodo per fabricare una griglia costituita da due materiali diversie capace di essere inizialmente rigida mentre dopo la messa in eser cizio permette dilatazioni termiche differenziali
IT8025181A0 (it) * 1980-10-08 1980-10-08 Ponte Nizza Pavia Supporto antisismico a griglia per tubi di generatori di vapore, scambiatori di calore, particolarmente per generatori di vapore tipo pwr.
DE3630502A1 (de) * 1986-09-08 1988-03-10 Gutehoffnungshuette Man Rohrabstandsgitter zum fuehren der rohre von beispielsweise dampferzeugern
DE3631886A1 (de) * 1986-09-19 1988-03-31 Gutehoffnungshuette Man Abstandshalter fuer gitterstaebe eines rohrabstandsgitters in waermetauschern

Also Published As

Publication number Publication date
DE19511265A1 (de) 1996-10-02
EP0735336A3 (fr) 1997-07-02

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