EP0277171B1 - Plate heat exchanger with threaded connection ports - Google Patents

Plate heat exchanger with threaded connection ports Download PDF

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Publication number
EP0277171B1
EP0277171B1 EP87904983A EP87904983A EP0277171B1 EP 0277171 B1 EP0277171 B1 EP 0277171B1 EP 87904983 A EP87904983 A EP 87904983A EP 87904983 A EP87904983 A EP 87904983A EP 0277171 B1 EP0277171 B1 EP 0277171B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
plate
plate heat
cylindrical part
connection
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.)
Expired - Lifetime
Application number
EP87904983A
Other languages
German (de)
French (fr)
Other versions
EP0277171A1 (en
Inventor
Bo-Göran NILSSON
Nils- ke JÖNSSON
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

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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
    • 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-A-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. Such an arrangement is disclosed in US-A-2699324.
  • 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.
  • 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 3 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 cylindrical 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 into abutment against an outside surface 8 of the end plate 1.
  • the cylindrical part 6 extends about halfway 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 feature of this embodiment is 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 be subjected to excessive shearing forces.

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

Abstract

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 (1) having threaded connection ports (2). According to the invention each of said connection ports (2) is provided with a lining (3), which comprises a hollow cylindrical part (6) extending through the port (2) and a flange (4) abutting against the inside surface (5) of the end plate (1) facing the heat exchange plates, said cylindrical part (6) having an external thread in engagement with the thread of the connection port (2).

Description

  • 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-A-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. Such an arrangement is disclosed in US-A-2699324.
  • 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 and 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 3 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 cylindrical 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 into abutment against an outside surface 8 of the end plate 1. The cylindrical part 6 extends about halfway 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 feature of this embodiment is 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 be subjected to excessive shearing forces.

Claims (5)

1. Plate heat exchanger colT':1rising 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), characterized in 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 plante (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, characterized in 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, characterized in that the connection sleeve (7) abuts against the outside surface (8) or the end plate (1).
4. Plate heat exchanger according to claim 3, characterized in 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, characterized in 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 EP0277171A1 (en) 1988-08-10
EP0277171B1 true 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) DK131788D0 (en)
SE (1) SE8603109D0 (en)
WO (1) WO1988000682A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010044723A2 (en) 2008-10-15 2010-04-22 Alfa Laval Corporate Ab A plate heat exchanger

Families Citing this family (3)

* 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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699324A (en) * 1949-01-13 1955-01-11 Apv Co Ltd Plate type heat exchanger

Family Cites Families (6)

* 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
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699324A (en) * 1949-01-13 1955-01-11 Apv Co Ltd Plate type heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010044723A2 (en) 2008-10-15 2010-04-22 Alfa Laval Corporate Ab A plate heat exchanger

Also Published As

Publication number Publication date
WO1988000682A1 (en) 1988-01-28
EP0277171A1 (en) 1988-08-10
JPH01500366A (en) 1989-02-09
DK131788A (en) 1988-03-11
SE8603109D0 (en) 1986-07-14
DK131788D0 (en) 1988-03-11

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