Nothing Special   »   [go: up one dir, main page]

EP0277171A1 - Plate heat exchanger with threaded connection ports. - Google Patents

Plate heat exchanger with threaded connection ports.

Info

Publication number
EP0277171A1
EP0277171A1 EP87904983A EP87904983A EP0277171A1 EP 0277171 A1 EP0277171 A1 EP 0277171A1 EP 87904983 A EP87904983 A EP 87904983A EP 87904983 A EP87904983 A EP 87904983A EP 0277171 A1 EP0277171 A1 EP 0277171A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
plate
plate heat
connection
cylindrical part
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
EP87904983A
Other languages
German (de)
French (fr)
Other versions
EP0277171B1 (en
Inventor
Bo-Goran Nilsson
Nils-Ke Jonsson
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.)
Alfa Laval Thermal AB
Original Assignee
Alfa Laval Thermal AB
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 Alfa Laval Thermal AB filed Critical Alfa Laval Thermal AB
Publication of EP0277171A1 publication Critical patent/EP0277171A1/en
Application granted granted Critical
Publication of EP0277171B1 publication Critical patent/EP0277171B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/002—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using inserts or attachments
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F28F9/10—Arrangements for sealing elements into header boxes or end plates by dismountable joints by screw-type connections, e.g. gland

Definitions

  • the present invention relates to a plate heat exchanger comprising, several heat exchange plates disposed between two end plates in a heat exchanger frame, at least one of the end plates having a threaded connection port.
  • a previously known heat exchanger of this kind is disclosed for example in GB 1 009 178, where a connection pipe is screwed directly into each connection port from the outside surface of the relevant end plate.
  • End plates for heat exchangers of the above general kind are usually made of a material which is not resistant to corrosive media. Since use of a corrosion resistant material for the manufacture of end plates has been considered too expensive, development work has been concentrated on the provision of protective linings for the end plate connection ports where needed.
  • the current method of lining a connection port in a relatively small plate heat exchanger is to arrange a hollow cylinder with a flange in a non-threaded connection port such that the flange abuts against the inside surface of the end plate.
  • the portion of the cylinder extending out of the outside surface of the end plate is then secured to the end plate either by being welded to the end plate along the circumference of the connection port or by being provided by rolling with a bulge located close to the outside surface of the end plate.
  • the known linings are provided with a thread at the outer end portion of the hollow cylinder, which is intended to engage with a connection sleeve for connection with a threaded connection pipe.
  • the object of the present invention is to provide a new design for plate heat exchangers which fulfills this desideratum in a way such that the end plates of the heat exchangers can be easily adaptable for use in connection with either corrosive or non-corrosive heat exchanging media.
  • connection port is provided with a lining, which comprises a hollow cylindrical part extending through the port and a flange abutting the inside surface of the end plate, facing the heat exchange plates, said cylindrical part having an external thread in engagement with the thread of the connection port.
  • the present invention it is possible to keep a stock of relatively cheap end plates, which can be used directly in plate heat exchangers intended for non-corrosive media or which easily can be provided with linings for use in plate heat exchangers intended for corrosive media. Further, by the present invention it will be both easier and cheaper than it was previously to provide an end plate with a new lining.
  • an end plate which either forms a frame plate or a pressure plate of a plate heat exchanger.
  • a threaded connection port 2 extends through the end plate 1.
  • a lining is arranged in said port 2 and comprises a flange 4, abutting against an inside surface 5 of the end plate 1 facing a pack of heat exchange plates (not shown), and a hollow cylindric part 6 extending through the port 2.
  • the cylindrical part 6 has an external thread allowing it to be screwed into the threaded connection port 2.
  • connection sleeve 7 A portion of the cylindrical part 6 of the lining 3 extends out from the end plate 1 and is engaged by a connection sleeve 7, which is provided with an internal thread.
  • the connection sleeve 7 has been screwed onto the cylindrical part 6 to abutment against an outside surface 8 of the end plate 1.
  • the cylindrical part 6 extends about half-way into the connection sleeve 7.
  • connection sleeve 7 also is in engagement with a connection pipe 9, which has an external thread.
  • the connection pipe 9 extends into the rest of the connection sleeve 7.
  • connection sleeve 7 An important part of the invention resides in the feature that essentially the whole of the cylindrical lining part 6 and the connection port 2 are threaded.
  • the flange 4 may thus remain essentially unloaded and, thereby, be made of a thin sheet material. This would not be possible if there were no thread engagement between the lining and the end plate. A corresponding flange would then by subjected to excessive shearing forces.

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)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

Un échangeur de chaleur à plaques comprend plusieurs plaques d'échanges de chaleur disposées entre deux plaques d'extrémité dans une structure d'échangeur de chaleur, au moins une des plaques d'extrémité (1) présentant des orifices de connexion taraudés (2). Selon la présente invention, chacun des orifices de connexion (2) est pourvu d'une garniture (3), qui comprend une partie cylindrique creuse (6) s'étendant à travers l'orifice (2) et un bord (4) en about contre la surface interne (5) de la plaque d'extrémité (1)faisant face aux plaques d'échange de chaleur, ladite partie cylindrique (6) étant pourvue d'un filetage externe s'engageant dans le taraudage de l'orifice de connexion (2).A plate heat exchanger comprises several heat exchange plates arranged between two end plates in a heat exchanger structure, at least one of the end plates (1) having threaded connection orifices (2) . According to the present invention, each of the connection orifices (2) is provided with a gasket (3), which comprises a hollow cylindrical part (6) extending through the orifice (2) and an edge (4) in abutting against the internal surface (5) of the end plate (1) facing the heat exchange plates, said cylindrical part (6) being provided with an external thread engaging in the thread of the orifice connection (2).

Description

Plate heat exchanger with threaded connection ports
The present invention relates to a plate heat exchanger comprising, several heat exchange plates disposed between two end plates in a heat exchanger frame, at least one of the end plates having a threaded connection port. A previously known heat exchanger of this kind is disclosed for example in GB 1 009 178, where a connection pipe is screwed directly into each connection port from the outside surface of the relevant end plate.
End plates for heat exchangers of the above general kind are usually made of a material which is not resistant to corrosive media. Since use of a corrosion resistant material for the manufacture of end plates has been considered too expensive, development work has been concentrated on the provision of protective linings for the end plate connection ports where needed.
The current method of lining a connection port in a relatively small plate heat exchanger is to arrange a hollow cylinder with a flange in a non-threaded connection port such that the flange abuts against the inside surface of the end plate. The portion of the cylinder extending out of the outside surface of the end plate is then secured to the end plate either by being welded to the end plate along the circumference of the connection port or by being provided by rolling with a bulge located close to the outside surface of the end plate. The known linings are provided with a thread at the outer end portion of the hollow cylinder, which is intended to engage with a connection sleeve for connection with a threaded connection pipe.
The just described linings have never been intended for use in a plate heat exchanger of the initially defined kind, which has an end plate with threaded connection ports allowing the connection pipes to be screwed directly into the end plate. The said known plate heat exchanger, obviously, is intended for use only in connection with non-corrosive heat exchanging media.
It is generally desirable to reduce the assortment of plate heat exchangers in a stock and, still, to have heat exchangers available for various applications. The object of the present invention is to provide a new design for plate heat exchangers which fulfills this desideratum in a way such that the end plates of the heat exchangers can be easily adaptable for use in connection with either corrosive or non-corrosive heat exchanging media.
This object is obtainable by means of a plate heat exchanger design of the initially defined kind, which is characterized mainly in that the connection port is provided with a lining, which comprises a hollow cylindrical part extending through the port and a flange abutting the inside surface of the end plate, facing the heat exchange plates, said cylindrical part having an external thread in engagement with the thread of the connection port.
By the present invention it is possible to keep a stock of relatively cheap end plates, which can be used directly in plate heat exchangers intended for non-corrosive media or which easily can be provided with linings for use in plate heat exchangers intended for corrosive media. Further, by the present invention it will be both easier and cheaper than it was previously to provide an end plate with a new lining.
The invention will be described in more detail with reference to the accompanying drawing, which shows a section through a connection port in an end plate of a plate heat exchanger according to the invention.
In the drawing there is shown an end plate, which either forms a frame plate or a pressure plate of a plate heat exchanger. A threaded connection port 2 extends through the end plate 1. A lining is arranged in said port 2 and comprises a flange 4, abutting against an inside surface 5 of the end plate 1 facing a pack of heat exchange plates (not shown), and a hollow cylindric part 6 extending through the port 2. The cylindrical part 6 has an external thread allowing it to be screwed into the threaded connection port 2.
A portion of the cylindrical part 6 of the lining 3 extends out from the end plate 1 and is engaged by a connection sleeve 7, which is provided with an internal thread. The connection sleeve 7 has been screwed onto the cylindrical part 6 to abutment against an outside surface 8 of the end plate 1. The cylindrical part 6 extends about half-way into the connection sleeve 7.
Said connection sleeve 7 also is in engagement with a connection pipe 9, which has an external thread. The connection pipe 9 extends into the rest of the connection sleeve 7.
An important part of the invention resides in the feature that essentially the whole of the cylindrical lining part 6 and the connection port 2 are threaded. Thus it will be possible to provide the required locking of the lining 3 relative to the end plate 1 by means of the connection sleeve 7. The flange 4 may thus remain essentially unloaded and, thereby, be made of a thin sheet material. This would not be possible if there were no thread engagement between the lining and the end plate. A corresponding flange would then by subjected to excessive shearing forces.

Claims

Claims
1. Plate heat exchanger comprising several heat exchange plates disposed between two end plates in a heat exchanger frame, at least one (1) of the end plates having a threaded connection port (2), c h a r a c t e r i z e d i n that the connection port (2) is provided with a lining (3), which comprises a hollow cylindrical part (6) extending through the port (2) and a flange (4) abutting the inside surface (5) of the end plate (1) facing said heat exchange plates, said cylindrical part (6) having an external thread in engagement with the thread of the connection port (2).
2. Plate heat exchanger according to claim 1, c h a r a c t e r i z e d i n that the cylindrical part (6) of the lining
(3) extends from the end plate (1) and is in engagement through its external thread with a connection sleeve (7) provided with an internal thread.
3. Plate heat exchanger according to claim 2, c h a r a c t e r i z e d i n that the connection sleeve (7) abuts against the outside surface (8) of the end plate (1).
4. Plate heat exchanger according to claim 3, c h a r a c - t e r i z e d i n that the connection sleeve (7) is in engagement with a connection pipe (9) having an external thread.
5. Plate heat exchanger according to any of the claims 1-4, c h a r a c t e r i z e d i n that the external thread of the cylindrical part (6) extends over essentially its whole length.
EP87904983A 1986-07-14 1987-07-02 Plate heat exchanger with threaded connection ports Expired - Lifetime EP0277171B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8603109A SE8603109D0 (en) 1986-07-14 1986-07-14 DEVICE PLATE / PRESSURE PLATE FOR A HEAT EXCHANGER
SE8603109 1986-07-14

Publications (2)

Publication Number Publication Date
EP0277171A1 true EP0277171A1 (en) 1988-08-10
EP0277171B1 EP0277171B1 (en) 1990-03-28

Family

ID=20365105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87904983A Expired - Lifetime EP0277171B1 (en) 1986-07-14 1987-07-02 Plate heat exchanger with threaded connection ports

Country Status (5)

Country Link
EP (1) EP0277171B1 (en)
JP (1) JPH01500366A (en)
DK (1) DK131788A (en)
SE (1) SE8603109D0 (en)
WO (1) WO1988000682A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697621B1 (en) * 1992-11-03 1995-01-13 Ciat Sa Plate heat exchanger.
SE507800C2 (en) * 1996-11-14 1998-07-13 Alfa Laval Ab Plate heat exchanger with lined connection pipe and support device for counteracting deflection of the plate heat exterior heat transfer plate
SE518971C2 (en) * 2001-04-24 2002-12-10 Alfa Laval Ab Feeding device for a plate heat exchanger, plate heat exchanger and method for manufacturing such a
SE533394C2 (en) * 2008-10-15 2010-09-14 Alfa Laval Corp Ab A plate heat exchanger

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1222806A (en) * 1916-04-03 1917-04-17 Frederick Schmitt Boiler-flue-setting device.
US1330910A (en) * 1919-11-12 1920-02-17 Shelton Reuben Boiler-flue
US1364814A (en) * 1919-11-28 1921-01-04 Saucke Herman Packing-ring
US2699324A (en) * 1949-01-13 1955-01-11 Apv Co Ltd Plate type heat exchanger
GB1009178A (en) * 1962-07-19 1965-11-10 Herbert Fernyhough Maddocks Improvements in and relating to heat exchangers
GB1041805A (en) * 1964-07-13 1966-09-07 Apv Co Ltd Improvements in or relating to plate heat exchanger connections
GB2000267A (en) * 1977-04-19 1979-01-04 Apv Co Ltd Immprovements in or relating to connecting ports for plate heat exchangers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8800682A1 *

Also Published As

Publication number Publication date
DK131788D0 (en) 1988-03-11
JPH01500366A (en) 1989-02-09
EP0277171B1 (en) 1990-03-28
WO1988000682A1 (en) 1988-01-28
SE8603109D0 (en) 1986-07-14
DK131788A (en) 1988-03-11

Similar Documents

Publication Publication Date Title
US3948315A (en) Closure for heat exchanger
US4288109A (en) Corrosion resistant assembly and method of making it
CA1036591A (en) Keel cooler with spiral fluted tubes
CA1117101A (en) Heat exchanger
EP0277171A1 (en) Plate heat exchanger with threaded connection ports.
US4832377A (en) Arrangement for fixing end of thin-walled pipe to flange coupling
US4063758A (en) Coupling for pipes
US5131697A (en) Pipe and coupling system
US6775909B2 (en) Lining device for a plate heat exchanger
EP0169843B2 (en) Frame plate and/or pressure plate for a plate heat exchanger
EP0119230B1 (en) Plate heat exchanger
GB2025555A (en) Conduit connector
US2192328A (en) Closure for heat exchangers
JPS6199790A (en) All-metal ultra-high vacuum joint
US4635677A (en) Valve manifold mounting bracket
JP2892309B2 (en) Metal fittings for resin tubes
JPH07117354B2 (en) Heat exchanger refrigerant coupling
JPH04138583U (en) Heat exchanger
JPS6324396Y2 (en)
US5649361A (en) Method of making an heat exchanger having a compression fitting with a load bearing ring
JPH0740860Y2 (en) Shell tube type heat exchanger
JP4202745B2 (en) Heat exchanger connector temporary fixing structure
CA1284160C (en) Conduit connector structure and sealing-ring
JPH10281355A (en) Pipe joint and pipe connecting method by using the pipe joint
JPS6339370Y2 (en)

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): DE FR GB IT SE

17P Request for examination filed

Effective date: 19880708

17Q First examination report despatched

Effective date: 19881115

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

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

Ref country code: FR

Effective date: 19900328

Ref country code: SE

Effective date: 19900328

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;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: 19900328

REF Corresponds to:

Ref document number: 3762067

Country of ref document: DE

Date of ref document: 19900503

EN Fr: translation not filed
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
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910702

GBPC Gb: european patent ceased through non-payment of renewal fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060629

Year of fee payment: 20