EP0027092A1 - Abstandshaltegitter für Rohrbündel - Google Patents

Abstandshaltegitter für Rohrbündel Download PDF

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Publication number
EP0027092A1
EP0027092A1 EP80401438A EP80401438A EP0027092A1 EP 0027092 A1 EP0027092 A1 EP 0027092A1 EP 80401438 A EP80401438 A EP 80401438A EP 80401438 A EP80401438 A EP 80401438A EP 0027092 A1 EP0027092 A1 EP 0027092A1
Authority
EP
European Patent Office
Prior art keywords
grooves
tubes
face
sheet
series
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
EP80401438A
Other languages
English (en)
French (fr)
Other versions
EP0027092B1 (de
Inventor
Michel Batistoni
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
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 Framatome SA filed Critical Framatome SA
Publication of EP0027092A1 publication Critical patent/EP0027092A1/de
Application granted granted Critical
Publication of EP0027092B1 publication Critical patent/EP0027092B1/de
Expired 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 present invention relates to a spacer grid for tubular bundles, more particularly intended by way of example for tubular bundles of steam generators of nuclear power plants.
  • the steam generators of pressurized water nuclear power plants comprise a long tube bundle, straight or U-shaped, traversed by the primary fluid coming from the reactor core, and bathed by the secondary fluid which enters in liquid form to exit under form of vapor after having taken a significant part of the calories from the primary fluid.
  • the tubes are generally held radially at several points by retaining and spacing grids.
  • each tube passage orifice has only three or four cir incomplete rings with a diameter slightly greater than the outside diameter of the tube, and between them are openings which constitute zones for the passage of the secondary fluid.
  • Such embodiments improve the circulation of the secondary fluid and limit the risks of corrosion, but require broaching machining, which is expensive and requires the use of special machine tools.
  • the present invention allows the production of spacer grids of low manufacturing cost thanks to simple machining, without tight tolerances, and achievable on conventional machines, while ensuring good rigidity of the assembly, good support of the tubes and a large section. secondary fluid passage.
  • the spacer grid is constituted by a flat sheet having on each face a series of parallel grooves, of different direction for each face, with depths of grooves, respectively relative to each face, such that their sum is greater than l sheet thickness, the number, the pitch and the width of the grooves being determined as a function of the corresponding characteristics of the tube bundle.
  • Figure 1 shows the angle of a thick sheet machined according to the invention to form a spacer grid. It is to facilitate the drawing and the description that a part of a rectangular sheet has been shown here, but of course, in particular for use in a steam generator, the outline of the sheet before machining will be more often circular.
  • the sheet 1 On its upper face the sheet 1 is here hollowed out by a series of parallel grooves with a U-shaped profile 2. On the lower face it is also hollowed out by a series of parallel grooves with an inverted U-shaped profile 3, the directions of the grooves 2 and 3 being perpendicular.
  • the depths of the grooves 2 and 3 are here greater than the half thickness of the sheet, so that there is interpenetration of the grooves and appearance of lights 5 at their intersections. If, as here, the grooves 2 and 3 are equidistant, of the same width and perpendicular, a regular network of orifices 5 is obtained, the profile of which is square when the sheet is viewed perpendicularly to one or the other of its faces.
  • the sheet thus perforated remains a single piece, therefore particularly rigid, and is presented as the superposition with offset of two crossed networks of parallel bars 7 and 8, rigidly joined by connecting parts 9.
  • the two series of grooves can be made on entirely conventional machine tools such as planers or milling machines, and with completely standard tools, that is to say under very economical conditions of production.
  • the passage sections between bars on the lower and upper faces of the spacer only depend on the characteristics of the tubes, that is to say on their pitch and their diameter; on the other hand the passage section inside the spacer depends on the relative values of the groove depths and the thickness of the raw sheet, so that the choice of these various parameters will depend on the residual section that is will want to leave the bars 7 and 8, that is to say the importance of the radial forces that we want to make them bear.
  • FIG. 8 schematically illustrates an embodiment, for a triangular mesh of the tubes, where the two series of grooves instead of being perpendicular are inclined at 60 °; the tube passage orifices then have, seen from above, a diamond shape.

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)
EP19800401438 1979-10-08 1980-10-08 Abstandshaltegitter für Rohrbündel Expired EP0027092B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7924984A FR2467371A1 (fr) 1979-10-08 1979-10-08 Grille entretoise pour faisceaux tubulaires
FR7924984 1979-10-08

Publications (2)

Publication Number Publication Date
EP0027092A1 true EP0027092A1 (de) 1981-04-15
EP0027092B1 EP0027092B1 (de) 1982-03-24

Family

ID=9230436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800401438 Expired EP0027092B1 (de) 1979-10-08 1980-10-08 Abstandshaltegitter für Rohrbündel

Country Status (3)

Country Link
EP (1) EP0027092B1 (de)
DE (1) DE3060251D1 (de)
FR (1) FR2467371A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003067170A1 (en) * 2002-02-05 2003-08-14 Shell Internationale Research Maatschappij B.V. Tube bundle
US7389811B2 (en) 2003-08-06 2008-06-24 Shell Oil Company Expanded metal

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2150826A1 (de) * 1971-08-27 1973-04-13 Babcock & Wilcox Co
US3820594A (en) * 1972-12-15 1974-06-28 Westinghouse Electric Corp Tube support system for heat exchanger
FR2393217A1 (fr) * 1977-03-15 1978-12-29 Westinghouse Electric Corp Systeme support de tubes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2150826A1 (de) * 1971-08-27 1973-04-13 Babcock & Wilcox Co
US3820594A (en) * 1972-12-15 1974-06-28 Westinghouse Electric Corp Tube support system for heat exchanger
FR2393217A1 (fr) * 1977-03-15 1978-12-29 Westinghouse Electric Corp Systeme support de tubes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003067170A1 (en) * 2002-02-05 2003-08-14 Shell Internationale Research Maatschappij B.V. Tube bundle
CN100359280C (zh) * 2002-02-05 2008-01-02 国际壳牌研究有限公司 管束
AU2003218972B2 (en) * 2002-02-05 2008-02-21 Brembana & Rolle S.P.A. Tube bundle
US7997329B2 (en) 2002-02-05 2011-08-16 Shell Oil Company Tube bundle
US7389811B2 (en) 2003-08-06 2008-06-24 Shell Oil Company Expanded metal
US7934301B2 (en) 2003-08-06 2011-05-03 Shell Oil Company Method of manufacturing expanded metal

Also Published As

Publication number Publication date
DE3060251D1 (en) 1982-04-29
FR2467371A1 (fr) 1981-04-17
EP0027092B1 (de) 1982-03-24
FR2467371B1 (de) 1981-10-16

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