EP0671748A1 - Wärmetauscher für Gefäss eines eingetauchten elektrischen Transformator - Google Patents

Wärmetauscher für Gefäss eines eingetauchten elektrischen Transformator Download PDF

Info

Publication number
EP0671748A1
EP0671748A1 EP95470009A EP95470009A EP0671748A1 EP 0671748 A1 EP0671748 A1 EP 0671748A1 EP 95470009 A EP95470009 A EP 95470009A EP 95470009 A EP95470009 A EP 95470009A EP 0671748 A1 EP0671748 A1 EP 0671748A1
Authority
EP
European Patent Office
Prior art keywords
waves
wave
tank
heat exchanger
panel
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
EP95470009A
Other languages
English (en)
French (fr)
Other versions
EP0671748B1 (de
Inventor
Daniel Pierret
Raymond Battin
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.)
France Transfo SAS
Original Assignee
France Transfo SAS
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 France Transfo SAS filed Critical France Transfo SAS
Publication of EP0671748A1 publication Critical patent/EP0671748A1/de
Application granted granted Critical
Publication of EP0671748B1 publication Critical patent/EP0671748B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/06—Hollow fins; fins with internal circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/10—Secondary fins, e.g. projections or recesses on main fins

Definitions

  • the present invention relates to the tanks of immersed electrical transformers.
  • the invention relates to the manufacture of heat exchangers constituting the wall of these tanks or attached to them, and intended to ensure the cooling of the dielectric liquid in which the electrical part of the transformer is immersed within the tank.
  • an "immersed” transformer is a transformer whose electrical part (primary and secondary windings, as well as the magnetic circuit) is cooled by immersion in a liquid, with high dielectric properties, generally a mineral oil, contained in a tank watertight whose side walls, provided with hollow fins, serve as a heat exchanger with the external environment.
  • the walls are now usually formed by wavy panels, each panel forming one side of the tank.
  • radiators In the case of high power transformers, additional heat exchangers, called radiators, and often formed themselves by corrugated panels, are brought to a distance on the tank. Connection pipes are then provided to allow the circulation of the dielectric liquid between the tank and these external radiators.
  • the corrugated panels constituting immersed transformer exchangers are made in one piece and according to a single operation, from a metal strip (generally steel) which is deformed at regular intervals to form parallel, deep folds. The sides of these folds are joined by their edges, which are then closed by sealed welding to form a wave.
  • a metal strip generally steel
  • a corrugated panel is therefore a component of the manufacture of submerged transformers essentially constituted by a series of parallel waves, distributed along a common base and which, once mounted on the tank, become hollow fins placed in direct communication with the interior volume of the tank containing the dielectric liquid.
  • radiators mounted end to end at right angles thus form the side wall of a transformer tank.
  • it is a single corrugated panel which, folded in four, can form the complete perimeter of the tank.
  • An external radiator is conventionally made up of two identical wavy panels attached to one another along a plane, which is the plane of symmetry of the assembly, and assembled in a sealed manner. The radiator, once finished, is mounted remotely on the tank opposite one side thereof. In general, the two long sides of the tank, or even the four sides, are thus provided with radiators.
  • Each end of a corrugated panel whatever its destination (radiator or wall exchanger) is, as we understand it, constituted by a wave - or fin - one side of which faces outwards, the other side being look at the penultimate wave.
  • a problem encountered in the manufacture of transformers of the aforementioned type comes from galvanization.
  • the galvanizing operation desirable before painting to protect the tank and the radiators, is more and more often required by customers. It consists in immersing the tank and any radiators in a bath of zinc, or zinc alloy, brought to a temperature of 450 ° C and more, then after having extracted them, to let them cool in the open air .
  • radiators which consists in producing the cooling fins by bringing together identical unit elements juxtaposed, the number of which defines the desired length of radiator.
  • This standard unit element is produced by shallow stamping with a steel sheet press, which is then paired so that these stampings define two by two of the internal cavities of the element thus produced, in which the fluid can circulate.
  • the corresponding redons on the external surface then probably play a role of stiffening ribs sufficient to prevent the appearance of permanent deformation after galvanization.
  • the invention relates to a method of manufacturing a heat exchanger intended to be gal vanized (or more generally coated by immersion in a bath of molten material at high temperature), constituting exchanger of the wall side of a submerged electric transformer tank, or of an external radiator attached to said wall, and constituted by a wavy panel, characterized in that it consists in replacing the last wave situated at each end of the wavy panel by a constitutive structure itself of a wavy panel on a reduced scale which has a main plane wave parallel to the others waves and provided with daughter waves at least on its outer face.
  • daughter waves are present on both sides of the main wave.
  • the invention also relates to a corrugated panel thus produced, as well as any associated transformer or external radiator tank which is made of it.
  • these waves-girls fulfill two functions:
  • stiffeners which reduce the range of the faces of the wave which carries them and thus prevent its later warping after cooling at the outlet of the galvanizing tank.
  • a traditional submerged transformer tank has on its side wall 1 longitudinal cooling fins 3, the mechanical retention of which is ensured by transverse connecting rods 2.
  • these fins have the essential role of ensuring the thermal equilibrium of the transformer in operation at a given temperature level.
  • these fins are hollow and their internal volume 4 is in direct communication with the enclosure 5 of the tank so as to receive the dielectric liquid with which the latter is filled after the active part has been put in place - not shown- of the transformer (electrical windings and magnetic circuit).
  • such a panel is made from a steel strip 12, the width of which defines the height of the waves (fins), and that it is folded at close intervals - conventionally every 4 to 8 cm approximately. -to form parallel and deep folds. After sealing their edges 6 tightly by welding, these folds form the waves which will become the desired hollow cooling fins, once the corrugated panel is mounted on the tank.
  • the invention relates specifically to a new design of the terminal waves of such panels intended to become the end fins 7 on the sides of the side wall 1 of the tank and therefore exposed to the outside much more than the central fins 3.
  • the invention consists, as clearly shown in FIG. 2, of endowing the external face at least with end waves, referenced 9 in this figure, daughter waves 10.
  • daughter waves 11 are also provided on the internal face turned opposite the central waves 3.
  • daughter waves 10 are arranged longitudinally on their mother wave 9 and spaced one from the next by 3 to 6 cm approximately, without this being critical for the conservation of flatness.
  • Their width is also not a critical parameter. It can be chosen for example between 3 and 6 cm approximately.
  • the extent of the external daughter waves 10 must possibly respect the initial size of the tank, while the internal daughter waves 11 must if necessary take into account the proximity of the neighboring 3 waves.
  • FIGS. 3 and 4 taken successively in this order:
  • Figure 3 shows only the terminal portion of this panel, seen in profile, in a very schematic representation showing the shapes of the elements only.
  • the end wave is not formed like the other waves 3, but is replaced by several folds less deep than the folds of waves 3, but made in the same way. and on the same tool.
  • these folds are organized in two successive series 13 and 14, the first comprising three folds which will form the internal daughter waves 11, the second having the four folds constituting the external daughter waves 10 of the wave mother 9.
  • the corrugated panel After sealing by free sealing of the free edges of the folds formed in the strip 12, the corrugated panel is then ready to be mounted on the tank frame to form one of the sides of the side wall, the aesthetics of which will then be preserved after its immersion in a galvanizing bath.
  • the daughter waves on the internal side can have a height of 3 to 5 cm approximately.
  • the device for folding the steel strip constituting the corrugated panel will therefore have, if necessary, a space sized accordingly to perform the bending at right angles to the end wave provided with its daughter waves without being hampered by the 'previous wave.
  • daughter waves 11 also on the internal face is useful, otherwise it would be this face which, subjected to maximum deformation stresses, would risk undergoing a strong deformation, although, in this case, the appearance aesthetic would suffer only moderately since this face is not very visible, in any case much less than the opposite face.
  • the spacing between the daughter waves may be the same on each side.
  • the external face 8 'of the end fin 9 will be provided with 4 or 5 daughter waves on a transformer tank of 500 to 1000 KVA of power, for example.
  • the waveguide 9 can be formed, no longer by folding around the line B, but from two half waves 16 and 17 assembled by sealed welding 18 of their periphery.
  • the end of the half-waves can advantageously be bent at 90 ° to facilitate the positioning of the parts before welding.
  • the internal half-wave 17 carries the internal daughter waves 11 coming from the folds 13, while the external half-wave 16 is provided with the external daughter waves 10 coming from the folds 14.
  • the invention applies to any fin heat exchanger intended to form one side of the side wall of a tank for transformer, or to form a radiator attached to this tank and which will be coated with a protective material, such as a zinc film, by immersion in a bath of this molten material at high temperature.
  • a protective material such as a zinc film

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Transformer Cooling (AREA)
  • Coating With Molten Metal (AREA)
EP95470009A 1994-03-10 1995-03-08 Wärmetauscher für Gefäss eines eingetauchten elektrischen Transformator Expired - Lifetime EP0671748B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9402909 1994-03-10
FR9402909A FR2717299B1 (fr) 1994-03-10 1994-03-10 Echangeur thermique de cuve de transformateur électrique immergé.

Publications (2)

Publication Number Publication Date
EP0671748A1 true EP0671748A1 (de) 1995-09-13
EP0671748B1 EP0671748B1 (de) 1997-09-24

Family

ID=9460981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95470009A Expired - Lifetime EP0671748B1 (de) 1994-03-10 1995-03-08 Wärmetauscher für Gefäss eines eingetauchten elektrischen Transformator

Country Status (5)

Country Link
EP (1) EP0671748B1 (de)
AT (1) ATE158670T1 (de)
DE (1) DE69500745T2 (de)
ES (1) ES2108547T3 (de)
FR (1) FR2717299B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3812677A1 (de) * 2019-10-25 2021-04-28 Siemens Energy Global GmbH & Co. KG Radiator zur kühlung eines transformators oder einer drosselspule

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004040949B4 (de) * 2004-08-24 2007-05-31 Gessner, Hans-Jürgen Radiator mit verbesserter Wärmeübertragung
CN108766717B (zh) * 2018-04-16 2019-07-09 淮北达驰电气科技有限公司 一种变压器散热壳体
CN108766720B (zh) * 2018-05-17 2019-07-09 淮北智淮科技有限公司 一种具有防火功能的变压器散热装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR649613A (fr) * 1928-02-23 1928-12-26 Perfectionnement apporté dans l'établissement des échangeurs thermiques
JPS63246808A (ja) * 1987-04-02 1988-10-13 Toshiba Corp 油入機器のタンク
FR2697667A1 (fr) * 1992-11-03 1994-05-06 France Transfo Sa Panneau ondé de cuve de transformateur électrique immergé, son procédé de réalisation, et son application au montage d'une cuve.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR649613A (fr) * 1928-02-23 1928-12-26 Perfectionnement apporté dans l'établissement des échangeurs thermiques
JPS63246808A (ja) * 1987-04-02 1988-10-13 Toshiba Corp 油入機器のタンク
FR2697667A1 (fr) * 1992-11-03 1994-05-06 France Transfo Sa Panneau ondé de cuve de transformateur électrique immergé, son procédé de réalisation, et son application au montage d'une cuve.
EP0596554A1 (de) * 1992-11-03 1994-05-11 France Transfo (S.A.) Wellplatte für eingetauchten elektrischen Transformatorkessel, Verfahren zu ihrer Herstellung und Verwendung zur Montage eines Kessels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 53 (E - 713)<3401> 7 February 1989 (1989-02-07) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3812677A1 (de) * 2019-10-25 2021-04-28 Siemens Energy Global GmbH & Co. KG Radiator zur kühlung eines transformators oder einer drosselspule

Also Published As

Publication number Publication date
ATE158670T1 (de) 1997-10-15
EP0671748B1 (de) 1997-09-24
DE69500745D1 (de) 1997-10-30
DE69500745T2 (de) 1998-03-05
ES2108547T3 (es) 1997-12-16
FR2717299B1 (fr) 1996-05-10
FR2717299A1 (fr) 1995-09-15

Similar Documents

Publication Publication Date Title
FR2701554A1 (fr) Echangeur de chaleur pour composants électroniques et appareillages électro-techniques.
EP0811820A1 (de) Flachrohr mit einem in der Mitte befindlichen Distanzhalter für Wärmetauscher
EP0671748B1 (de) Wärmetauscher für Gefäss eines eingetauchten elektrischen Transformator
FR2499234A1 (fr) Echangeur de chaleur
FR2462682A1 (fr) Perfectionnements aux tubes de chaleur et aux siphons thermiques
EP2554080A1 (de) Verfahren zur Herstellung eines Kochgefäßes mit kontrollierter Verformung und erhaltenes Kochgefäß
FR2581827A1 (fr) Bande de connexion pour la fabrication de composants electriques a report direct et procede de fabrication de ces composants
EP1784613B1 (de) Interventionsverfahren für einen Wärmetauscher
FR2838509A1 (fr) Echangeur de chaleur a plaques presentant des passages de fluide en saillie
WO2014170178A1 (fr) Echangeur de chaleur avec ensemble de liaison de tête de distribution à double fonction
FR2832788A1 (fr) Profils de tubes pour echangeur thermique
EP0596554B1 (de) Wellplatte für Tauchtransformatortopf, Verfahren zu dessen Herstellung und Verwendung
EP0531197A1 (de) Verfahren zur Laserverpackung von elektronischen Schaltungen, insbesondere für Hybrid-Schaltungen zur Minimisierung von Spannungen
FR2776822A1 (fr) Ceinture ondee integrale pour cuve de transformateur electrique immerge
EP2072168B1 (de) Schweißverfahren von Rohrelementen für einen Radiator mit flüssigem Wärmeträger
EP3577408B1 (de) Wärmetauscherkopf
FR2972653A1 (fr) Procede de mise en forme de toles mecano soudees de forte epaisseur et structure obtenue par ce procede
FR2472158A1 (fr) Echangeurs de chaleur liquide-air et son procede de realisation
CN101063583B (zh) 冰箱内壳和制造冰箱内壳的方法
FR2515328A1 (fr) Echangeur de chaleur spirale et son procede de fabrication
BE653079A (de)
EP0348302A1 (de) Wärmetauscher mit Rippen für Wasserkessel
WO1997011329A1 (fr) Faisceau de plaques pour un echangeur thermique et echangeur thermique comportant un tel faisceau de plaques
BE444542A (de)
FR2810727A1 (fr) Tube plie pour un echangeur de chaleur et echangeur de chaleur comportant de tels tubes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES GB GR IE IT LI LU NL PT SE

17P Request for examination filed

Effective date: 19960125

17Q First examination report despatched

Effective date: 19960222

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES GB GR IE IT LI LU NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970924

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970924

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970924

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970924

Ref country code: AT

Effective date: 19970924

REF Corresponds to:

Ref document number: 158670

Country of ref document: AT

Date of ref document: 19971015

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69500745

Country of ref document: DE

Date of ref document: 19971030

ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2108547

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19971224

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 19971023

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: 76690

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980308

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19970924

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19990301

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030303

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20040303

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20040312

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040318

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040519

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050308

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050308

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050908

BERE Be: lapsed

Owner name: S.A. *FRANCE TRANSFO

Effective date: 20050331

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Effective date: 20050908

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050309

BERE Be: lapsed

Owner name: S.A. *FRANCE TRANSFO

Effective date: 20050331