EP0287422A1 - Zwischenträgergitter zur Querabstützung der Rohre eines Wärmetauscherrohrbündels und Montageverfahren eines solchen Zwischenträgergitters - Google Patents

Zwischenträgergitter zur Querabstützung der Rohre eines Wärmetauscherrohrbündels und Montageverfahren eines solchen Zwischenträgergitters Download PDF

Info

Publication number: EP0287422A1
Authority: EP; European Patent Office
Prior art keywords: tubes; hoops; branches; jumpers; spacer grid
Prior art date: 1987-04-17
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

EP88400777A

Other languages

English (en)

French (fr)

Other versions

EP0287422B1 (de

Inventor

Philippe Schutzenberger

Gérard Stalport

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

Novatome SA

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.)

1987-04-17

Filing date

1988-03-30

Publication date

1988-10-19

1988-03-30 Application filed by Novatome SA, Framatome SA filed Critical Novatome SA

1988-10-19 Publication of EP0287422A1 publication Critical patent/EP0287422A1/de

1991-01-23 Application granted granted Critical

1991-01-23 Publication of EP0287422B1 publication Critical patent/EP0287422B1/de

2008-03-30 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Images

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
- F28F9/0133—Auxiliary supports for elements for tubes or tube-assemblies formed by concentric strips

Definitions

the invention relates to a spacer grid for transversely holding the tubes of the bundle of a heat exchanger.
Heat exchangers are known which are used as standby heat exchangers for cooling the primary fluid of a nuclear reactor.
emergency heat exchangers are provided which are used for cooling the reactor after a shutdown following an incident, in particular in the failure of the main cooling circuit.
Such emergency exchangers are immersed in the primary sodium filling the reactor vessel and comprise a bundle of tubes inside which secondary sodium circulates ensuring the cooling of the primary sodium by heat exchange through the wall of the tubes.
the secondary sodium is itself cooled outside the reactor vessel, in a sodium-air exchanger.
the exchanger comprises a bundle of tubes which is immersed, vertically, over part of its height, in the primary liquid sodium filling the reactor vessel.
the bundle tubes each have an inlet end attached to a first tubular plate and an outlet end attached to a second tubular plate.
the two tubu plates laires are arranged in the same plane and have the same vertical axis which corresponds to the vertical axis of the beam.
One of the plates located at the central part of the beam is circular and the other plate, located at the peripheral part, is annular.
the tubes consist, over most of their length, by rectilinear and parallel branches which are arranged vertically, when the bundle is in place in the nuclear reactor vessel.
the bundle is of substantially circular section and has an axis parallel to the rectilinear branches of the tubes passing through the center of successive straight sections of the bundle in which the tubes are distributed in a regular network.
spacer grids are parallel to the tubular plates and substantially reproduce the network formed by the holes for the passage of the tubes in the tubular plates.
Such spacer grids are constituted by circular hoops of constant height and of radius increasing towards the outside arranged coa xially so that two successive hoops delimit an annular row of substantially constant width.
Elastic sheet metal devices are arranged in each of the annular rows and are fixed, on the one hand to the inner hoop and on the other hand to the outer hoop delimiting the row.
the elastic devices therefore ensure the assembly of the hoops constituting the spacer grid.
the elastic devices include housings for receiving the tubes and ensuring their transverse maintenance.
the elastic devices consist of a continuous metal band folded in a sinusoidal fashion and put in the form of a crown having a crenellated section providing successive housings for the tubes.
the shaping by folding of the crenellated crown a priori defines the relative arrangement of the tubes in the corresponding annular row. This therefore results in a lack of flexibility as to the arrangement of the tubes in the rows, when the beam is put in place.
the tubes are produced and shaped so as to have a perfectly defined geometry, their positioning in the cross sections can present some difficulties if their relative arrangement is defined a priori. This is particularly so because of the very long length of the bundle tubes.
each spacer grid has an internal part intended to receive the branches of the tubes connected to the central circular tubular plate and an external part intended to receive the branches of the tubes connected to the plate tu external annular bular.
the internal part of the spacer grids is assembled, the assembly of the external part being carried out at the time of the assembly of the tubes of the bundle which are placed successively in the annular rows of the spacer grids.
This mounting of the external part of the spacer grids during advancement requires being able to adapt the elastic devices for holding the tubes to the exact position of these tubes at the time of assembly.
the realization of the elastic devices in the form of a corrugated metal band and wound in a crown does not allow this adaptation to be easily ensured.
the object of the invention is therefore to propose a spacer grid for transversely holding the tubes of the bundle of a heat exchanger which are arranged with their axes parallel and held transversely to form a regular network in planes perpendicular to the axes, by spacer grids spaced along the axial direction of the beam and each constituted by a set of circular hoops having a common axis parallel to the tubes and by elastic devices for holding the tubes each fixed between two successive inner and outer hoops, respectively, ensuring the connection between the hoops and the holding of the tubes in an annular row between the two successive hoops, this spacer grid being able to be adapted to the exact position of the tubes of the bundle and being able to be easily mounted, in particular during advancement.
the elastic tube holding devices each consist of a set of U-shaped jumpers arranged successively in an annular row and each comprising two branches providing between them a housing for a tube and a common connecting part, the branches being welded at their free ends to the outer hoop and the common part to the inner hoop.
This spacer grid is constituted by circular hoops of constant height and of radius increasing towards the outside arranged so as to all have for axis the axis of the heat exchanger bundle, this axis having for trace the point 0 on the plan of figure 1.
the hoops of the spacer grid constitute a first internal assembly formed by the six hoops 1a, 1b, 1c, 1d, 1e, 1f and a second external assembly constituted by the four hoops 2a, 2b, 2c and 2d.
the hoops of the first set delimit annular rows 5 intended to receive the branches of the tubes 4 connected to the central tubular plate of the bundle of circular shape.
the hoops of the second set delimit annular rows 5 ⁇ intended to receive the branches of the tubes 4 connected to the outer tubular plate of annular shape of the heat exchanger.
the outer hoop 1f of the first assembly and the inner hoop 2a of the second assembly are connected together by means of pairs of parts 6, 6 ⁇ delimiting between them a space of cylindrical shape and each welded on the one hand to the hoop 1f and on the other hand to the hoop 2a.
a sheath 7 is fixed to each of the pairs of parts 6, 6 ⁇ , in the cylindrical space formed between these parts.
Vertical tie rods can be fixed inside the sleeves 7, to ensure the suspension of the spacer grid at the top of the heat exchanger, as described in patent application 2,568,363. Each of the tie rods is engaged in the sleeves of the different spacer grids placed according to the height of the beam.
each of the jumpers 8 having the general shape of a U has two branches 8a and 8b and a common part 8c for connection between the branches 8a and 8b.
Each of the branches 8a and 8b is folded outwards so as to constitute a housing 10 of flared shape for a tube 4 of the bundle.
the interior space of the rider thus comprises a part of small width close to the common connecting part 8c and a part close to the opening of the U of greater width, this part being connected to the part of small width by two inclined parts. branches 8a and 8b produced by folding.
the width of the jumper opening is greater than the outside diameter of the tubes 4 of the bundle, while the smaller width inside part of the jumper has a dimension less than the diameter of the tube 4.
the inclined intermediate parts of the branches 8a and 8b ensure the 'support and centering of the tube 4.
the branches 8a and 8b of the jumper 8 have at their end corresponding to the opening of the jumper, welding tabs 9a and 9b folded 90 ° outwards.
the jumpers 8 are welded to the corresponding ribs 1 or 2, on the one hand by means of their by common tie 8c and on the other hand via the legs 9a and 9b.
the welds are made on edge, at the lower edge and the upper edge of the corresponding hoops.
the weld zones extend only over a small height of the hoop, the remaining part of the contact zone between the rider and the hoops having no weld connection.
the inclination of the welding lugs 9a and 9b of the hoops 8 is adapted to the radius of curvature of the hoop on which these lugs are fixed.
the jumpers are fixed by the end of their branches on the inner surface of the outer hoop limiting the row where they are arranged and by their common part on the outer surface of the inner hoop limiting the row.
the spacer grids were made for an emergency heat exchanger of a fast neutron nuclear reactor cooled by liquid sodium.
the spacer grids are formed by stainless steel hoops whose height is 35 mm and the thickness of 1 mm.
the mounting of the spacer grids and of the bundle tubes can be carried out according to the method described in patent application 2,568,363.
the hoops 1a, 1b, 1c, 1d, 1e, 1f constituting the inner part of the spacer grid are first assembled using jumpers 8 arranged in the rows, one after the other with a substantially constant spacing. This spacing can however be adjusted as a function of the exact position of the branches of the tubes connected to the central part of the tube plate.
the jumpers 8 are fixed to the hoops 1, inside the annular rows 5, by TIG welds on edge, at the upper edge and at the lower edge of the corresponding hoops, that is to say by the above and below these hoops (flat and ceiling welding). This edge welding operation can be carried out quickly and without particular difficulties.
the outer rings 2 constituting the annular rows 5 ⁇ are then put in place, at the time of assembly of the bundle tubes.
the tubes 4, one of the branches of which is placed in a row 5 ⁇ of the external part of the spacer grid are placed in the internal part of the grids and in the central part of the tube plate.
the external part of the spacer grid is then produced during advancement.
the hoops 2a, 2b and 2c are formed in advance by welding the jumpers 8 on their common parts 8c.
the hoops thus formed are placed before threading the corresponding row of tubes.
the next hoop is placed by welding parts 9a and 9b of the jumpers of the previous hoop.
the position differences of the tubes are taken up before welding by pinching the jumpers, to ensure their correct positioning.
the jumpers 8 are set up very precisely and without difficulty.
the mounting of the spacer grid can therefore be carried out quickly and without difficulty, the spacer grid being also perfectly suited to the configuration of the beam.
jumpers of a shape different from that which has been described from the moment when these jumpers have two branches which can be connected to the outer hoop and a common part which can be connected to the inner hoop as well as an internal space reserving a housing for a tube 4 whose jumper 8 provides transverse support preventing any movement or any vibration in service.
the hoops and the jumpers can be made of any metallic material compatible with the conditions of use and the fluids used in the heat exchanger.
a spacer grid according to the invention can be used in any heat exchanger comprising a bundle of parallel tubes arranged in coaxial annular rows.

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)
Butt Welding And Welding Of Specific Article (AREA)

EP19880400777 1987-04-17 1988-03-30 Zwischenträgergitter zur Querabstützung der Rohre eines Wärmetauscherrohrbündels und Montageverfahren eines solchen Zwischenträgergitters Expired - Lifetime EP0287422B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR8705542A FR2614094B1 (fr)	1987-04-17	1987-04-17	Grille entretoise de maintien transversal des tubes du faisceau d'un echangeur de chaleur et procede de montage et utilisation d'une telle grille entretoise
FR8705542		1987-04-17

Publications (2)

Publication Number	Publication Date
EP0287422A1 true EP0287422A1 (de)	1988-10-19
EP0287422B1 EP0287422B1 (de)	1991-01-23

Family

ID=9350276

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19880400777 Expired - Lifetime EP0287422B1 (de)	1987-04-17	1988-03-30	Zwischenträgergitter zur Querabstützung der Rohre eines Wärmetauscherrohrbündels und Montageverfahren eines solchen Zwischenträgergitters

Country Status (4)

Country	Link
EP (1)	EP0287422B1 (de)
JP (1)	JPS6446589A (de)
DE (1)	DE3861615D1 (de)
FR (1)	FR2614094B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN111486740A (zh) *	2020-04-23	2020-08-04	中国原子能科学研究院	换热器及其组装方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN102561365A (zh) *	2011-12-01	2012-07-11	成都理工大学	溜砂坡加固装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2420735A2 (fr) *	1978-03-24	1979-10-19	Trepaud Georges	Echangeur de chaleur a faisceau tubulaire
GB1564821A (en) *	1977-02-04	1980-04-16	Atomic Energy Authority Uk	Tube in shell heat exchangers
US4286654A (en) *	1979-03-19	1981-09-01	Foster Wheeler Limited	Heat exchanger tube supports
FR2568363A1 (fr) *	1984-07-26	1986-01-31	Novatome	Echangeur de chaleur de secours pour le refroidissement du fluide primaire d'un reacteur nucleaire et procede de montage de cet echangeur de chaleur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5811392A (ja) *	1981-07-10	1983-01-22	Hitachi Ltd	熱交換器の伝熱管支持構造

1987
- 1987-04-17 FR FR8705542A patent/FR2614094B1/fr not_active Expired
1988
- 1988-03-30 DE DE8888400777T patent/DE3861615D1/de not_active Expired - Lifetime
- 1988-03-30 EP EP19880400777 patent/EP0287422B1/de not_active Expired - Lifetime
- 1988-04-15 JP JP9333488A patent/JPS6446589A/ja active Pending

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1564821A (en) *	1977-02-04	1980-04-16	Atomic Energy Authority Uk	Tube in shell heat exchangers
FR2420735A2 (fr) *	1978-03-24	1979-10-19	Trepaud Georges	Echangeur de chaleur a faisceau tubulaire
US4286654A (en) *	1979-03-19	1981-09-01	Foster Wheeler Limited	Heat exchanger tube supports
FR2568363A1 (fr) *	1984-07-26	1986-01-31	Novatome	Echangeur de chaleur de secours pour le refroidissement du fluide primaire d'un reacteur nucleaire et procede de montage de cet echangeur de chaleur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN111486740A (zh) *	2020-04-23	2020-08-04	中国原子能科学研究院	换热器及其组装方法
CN111486740B (zh) *	2020-04-23	2021-09-28	中国原子能科学研究院	换热器及其组装方法

Also Published As

Publication number	Publication date
DE3861615D1 (de)	1991-02-28
JPS6446589A (en)	1989-02-21
FR2614094B1 (fr)	1989-09-15
FR2614094A1 (fr)	1988-10-21
EP0287422B1 (de)	1991-01-23

Legal Events

Date	Code	Title	Description
1988-09-03	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
1988-10-19	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): BE DE GB IT NL
1988-11-02	17P	Request for examination filed	Effective date: 19880907
1989-10-04	17Q	First examination report despatched	Effective date: 19890821
1990-05-02	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: FRAMATOME
1990-12-08	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1991-01-23	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): BE DE GB IT NL
1991-01-29	ITF	It: translation for a ep patent filed	Owner name: JACOBACCI & PERANI S.P.A.
1991-02-28	REF	Corresponds to:	Ref document number: 3861615 Country of ref document: DE Date of ref document: 19910228
1991-03-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: NL Payment date: 19910331 Year of fee payment: 4
1991-04-10	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: BE Payment date: 19910410 Year of fee payment: 4
1991-05-29	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
1991-11-23	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1991-11-23	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1992-01-15	26N	No opposition filed
1992-03-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: BE Effective date: 19920331
1992-09-30	BERE	Be: lapsed	Owner name: FRAMATOME Effective date: 19920331
1992-10-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Effective date: 19921001
1992-11-16	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee
1993-03-03	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 19930303 Year of fee payment: 6
1993-03-23	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 19930323 Year of fee payment: 6
1994-03-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Effective date: 19940330
1994-11-30	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19940330
1994-12-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Effective date: 19941201
2005-03-30	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: 20050330

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