EP0024195B1 - Heat transfer plate having a gasket groove and method of forming such a groove - Google Patents

Heat transfer plate having a gasket groove and method of forming such a groove Download PDF

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Publication number
EP0024195B1
EP0024195B1 EP19800302777 EP80302777A EP0024195B1 EP 0024195 B1 EP0024195 B1 EP 0024195B1 EP 19800302777 EP19800302777 EP 19800302777 EP 80302777 A EP80302777 A EP 80302777A EP 0024195 B1 EP0024195 B1 EP 0024195B1
Authority
EP
European Patent Office
Prior art keywords
heat transfer
plastics material
plate
groove
pressed
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
Application number
EP19800302777
Other languages
German (de)
French (fr)
Other versions
EP0024195A3 (en
EP0024195A2 (en
Inventor
Michael Peter Bond
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.)
APV International Ltd
Original Assignee
APV International Ltd
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 APV International Ltd filed Critical APV International Ltd
Priority to AT80302777T priority Critical patent/ATE4936T1/en
Publication of EP0024195A2 publication Critical patent/EP0024195A2/en
Publication of EP0024195A3 publication Critical patent/EP0024195A3/en
Application granted granted Critical
Publication of EP0024195B1 publication Critical patent/EP0024195B1/en
Expired legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/10Arrangements for sealing the margins

Definitions

  • This invention relates to the gasketing of plate heat transfer apparatus.
  • a plate heat transfer apparatus i.e. either a plate heat exchanger or a plate evaporator, consists of a series of plates arranged in a spaced, face-to-face, parallel relationship to form flow spaces between the plates.
  • the boundaries of the flow spaces are formed and sealed by gaskets which are normally mounted in grooves pressed into the plates.
  • the gaskets are normally of a rubber or rubber-like material and are retained in their respective grooves by adhesive.
  • the initial mounting of the gaskets in the grooves is a fairly time consuming process involving surface preparation, application of adhesive, location of the gasket in the groove and probably curing of the adhesive. When the gasket needs to be replaced, the old gasket has to be stripped out, the metal surface cleaned of old adhesive and then the new gasket has to be mounted with all that entails.
  • the gasket recesses were precision machined grooves, the sealing could-be more easily obtained by using preformed 0-ring, lip or other similar seals which would be a close mechanical fit in the grooves and would therefore not need to be retained by adhesive.
  • the usual metal thickness e.g. 0.7 mm
  • precision machining of grooves is not practicable and for many years the use of adhesive has been the normal practice in the industry.
  • the present invention should disclose a replaceable seal and a method of forming a seal which does not require an accurately machined groove in the metal plate, adhesive fixing of the sealing gasket or a specially manufactured sealing gasket.
  • a pressed metal heat transfer plate having a pressed gasket groove characterized in that said pressed groove is at least partially filled with a rigid plastics material which adheres to the plate metal and which is formed in situ with an accurate recess adapted to receive and retain by a close mechanical fit, a preformed seal of O-ring, lip or other appropriate type.
  • the heat transfer plate may be characterised in that the plastics material is formed with two or more accurate recesses to receive seals so as to provide a double or multifold seal between the flow spaces and the environment.
  • the heat transfer plate may be characterised in that the space between the seals of the double seal is monitored for leaking fluid.
  • the heat transfer plate may be characterised in that the monitoring is achieved by circulating a gas or liquid through the space.
  • a method of forming an accurately profiled gasket recess in a pressed metal heat-transfer plate characterised by the steps of forming a pressed groove in the metal plate, at least partially filling the pressed groove with a rigid plastics material which adheres to the metal of the plate, and accurately forming, in situ, the gasket recess in the plastics material.
  • the method may be characterised in that two or more parallel gasket recesses are formed in the plastics material.
  • the method may be characterised in that the or each gasket recess may be formed by moulding or by machining the plastics material.
  • a heat transfer apparatus comprising a pack of heat transfer plates as above defined.
  • a heat exchanger plate is illustrated at 1 and as having four corner ports 2, 3, 4 and 5.
  • the line of a peripheral gasket, of double seal form is indicated at 6, and it will be noted that the corner ports 4 and 5 also have port gaskets 7, also of double seal nature.
  • FIGS 2 to 4 each show a portion of the heat exchanger plate 1 as being provided with a pressed in gasket recess 8.
  • this recess 8 may be converted to a form sufficiently accurate for a preformed seal 6, it is filled with a plastics material 9 which has the property of adhering to the metal of the plate 1 and which is formed, either by pressure moulding or by machining, or a combination of both, with an accurately formed recess 10 to receive the seal.
  • the plastics material can be moulded under pressure so as simultaneously to fix it in the pressed groove and to form a suitably profiled recess 10, for the seal.
  • the plastics material can be roughly sculptured and, when cured, machined to form the final shape of the recess 10.
  • Figure 2 shows a construction in which the filling 9 is formed with a pair of such recesses 10, each of which is shown as receiving an O-ring seal 11 to form the double seal.
  • the configurations of the port gaskets 7 may be similar.
  • a seal of this nature is beneficial, especially if the space between them is monitored for leakage of the hazardous fluid so that this leakage is detected before the hazardous fluid leaks past the second seal into the ambient atmosphere.
  • the space between the two seals 11 may have an appropriate fluid pumped through it and in circuit with a detector to detect the presence of the hazardous fluid in the diluent. Suitable micro-bore piping may be used to make the connections.
  • grooves 10 of Figure 2 are shown as receiving 0-ring seals, lip or other seals could be used instead.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)

Description

  • This invention relates to the gasketing of plate heat transfer apparatus.
  • A plate heat transfer apparatus, i.e. either a plate heat exchanger or a plate evaporator, consists of a series of plates arranged in a spaced, face-to-face, parallel relationship to form flow spaces between the plates. The boundaries of the flow spaces are formed and sealed by gaskets which are normally mounted in grooves pressed into the plates. The gaskets are normally of a rubber or rubber-like material and are retained in their respective grooves by adhesive. The initial mounting of the gaskets in the grooves is a fairly time consuming process involving surface preparation, application of adhesive, location of the gasket in the groove and probably curing of the adhesive. When the gasket needs to be replaced, the old gasket has to be stripped out, the metal surface cleaned of old adhesive and then the new gasket has to be mounted with all that entails.
  • If, instead of being pressed, the gasket recesses were precision machined grooves, the sealing could-be more easily obtained by using preformed 0-ring, lip or other similar seals which would be a close mechanical fit in the grooves and would therefore not need to be retained by adhesive. However, when using the usual metal thickness (e.g. 0.7 mm) of plate heat transfer apparatus, precision machining of grooves is not practicable and for many years the use of adhesive has been the normal practice in the industry.
  • A possible solution to this problem was disclosed in GB-A-1 273139, which provides a single sealing element so shaped in cross-section that when compressed between a pair of adjacent plates a groove opens on its inner periphery, the groove being arranged to receive pressurized fluid, expand the groove and urge the sealing element more firmly into engagement with the adjacent plates. However, only minor variations would be catered for by this sealing element and the flexibility of the sealing element demanded the provision of integral plate spacing portions.
  • It is intended that the present invention should disclose a replaceable seal and a method of forming a seal which does not require an accurately machined groove in the metal plate, adhesive fixing of the sealing gasket or a specially manufactured sealing gasket.
  • According to a first aspect of the present invention, there is provided a pressed metal heat transfer plate having a pressed gasket groove characterized in that said pressed groove is at least partially filled with a rigid plastics material which adheres to the plate metal and which is formed in situ with an accurate recess adapted to receive and retain by a close mechanical fit, a preformed seal of O-ring, lip or other appropriate type.
  • By using an intermediate filling of plastics material permanently attached to the plate metal, no adhesive is required to attach the sealing gasket, conventional commercially available gasket forms may be used, the gasket loading may be reduced, which leads to easier tightening of the frame of the heat transfer apparatus, the application of the gasket can be automated more easily and the replacement of gaskets is facilitated.
  • Conveniently the heat transfer plate may be characterised in that the plastics material is formed with two or more accurate recesses to receive seals so as to provide a double or multifold seal between the flow spaces and the environment.
  • Preferably the heat transfer plate may be characterised in that the space between the seals of the double seal is monitored for leaking fluid.
  • More preferably the heat transfer plate may be characterised in that the monitoring is achieved by circulating a gas or liquid through the space.
  • According to a second aspect of the invention, there is provided a method of forming an accurately profiled gasket recess in a pressed metal heat-transfer plate, characterised by the steps of forming a pressed groove in the metal plate, at least partially filling the pressed groove with a rigid plastics material which adheres to the metal of the plate, and accurately forming, in situ, the gasket recess in the plastics material.
  • Conveniently the method may be characterised in that two or more parallel gasket recesses are formed in the plastics material.
  • Conveniently the method may be characterised in that the or each gasket recess may be formed by moulding or by machining the plastics material.
  • According to a third aspect of the invention there is provided a heat transfer apparatus comprising a pack of heat transfer plates as above defined.
  • The invention will be further described with reference to the accompanying drawings, in which:
    • Figure 1 is an elevation of a form of heat exchanger plate in accordance with a form of the present invention and having a double seal gasket;
    • Figure 2 is a section on the line 11-11 of Figure 1; and
    • Figures 3 and 4 are each diagrammatic sections similar to Figure 2 showing a form of single seal applied according to the techniques of the present invention.
  • For the sake of clarity the mechanical retention of the seal is not shown in Figures 2 to 4.
  • Turning first to Figure 1, a heat exchanger plate is illustrated at 1 and as having four corner ports 2, 3, 4 and 5. The line of a peripheral gasket, of double seal form is indicated at 6, and it will be noted that the corner ports 4 and 5 also have port gaskets 7, also of double seal nature.
  • Figures 2 to 4 each show a portion of the heat exchanger plate 1 as being provided with a pressed in gasket recess 8.
  • In order that this recess 8 may be converted to a form sufficiently accurate for a preformed seal 6, it is filled with a plastics material 9 which has the property of adhering to the metal of the plate 1 and which is formed, either by pressure moulding or by machining, or a combination of both, with an accurately formed recess 10 to receive the seal.
  • The plastics material can be moulded under pressure so as simultaneously to fix it in the pressed groove and to form a suitably profiled recess 10, for the seal. Alternatively, the plastics material can be roughly sculptured and, when cured, machined to form the final shape of the recess 10.
  • In Figure 3 the seal is shown in the form of a single 0-ring seal 12.
  • In Figure 4, the 0-ring seal 12 is shown as being replaced by a lip seal 13.
  • In accordance with a preferred form of the present invention, Figure 2 shows a construction in which the filling 9 is formed with a pair of such recesses 10, each of which is shown as receiving an O-ring seal 11 to form the double seal. The configurations of the port gaskets 7 may be similar.
  • It will be appreciated that when dealing with hazardous fluids, a seal of this nature is beneficial, especially if the space between them is monitored for leakage of the hazardous fluid so that this leakage is detected before the hazardous fluid leaks past the second seal into the ambient atmosphere. For this purpose, the space between the two seals 11 may have an appropriate fluid pumped through it and in circuit with a detector to detect the presence of the hazardous fluid in the diluent. Suitable micro-bore piping may be used to make the connections.
  • Various modifications may be made within the scope of the invention. Thus, although the grooves 10 of Figure 2 are shown as receiving 0-ring seals, lip or other seals could be used instead.

Claims (9)

1. A pressed metal heat transfer plate having a pressed groove (8) characterised in that the said pressed groove (8) is at least partially filled with a rigid plastics material (9) which adheres to the plate metal and which is formed in situ with an accurate recess (10) adapted to receive and retain by a close mechanical fit, a preformed seal (11) of 0-ring, lip or other appropriate type.
2. A heat transfer plate as claimed in claim 1, characterised in that the plastics material (9) is formed with two or more accurate recesses (10) to receive seals (11) so as to provide a double or multifold seal between the flow spaces and the ambient.
3. A heat transfer plate as claimed in claim 2, characterised in that the space between the seals (11) of the double seal is monitored for leaking fluid.
4. A heat transfer plate as claimed in claim 3, characterised in that the monitoring is achieved by circulating a gas or liquid through the space.
5. A method of forming an accurately profiled gasket recess (10) in a pressed metal heat transfer plate, characterised by the steps of forming a pressed groove (8) in the metal plate, at least partially filling the pressed groove (8) with a rigid plastics material (9) which adheres to the metal of the plate, and accurately forming, in situ, the gasket recess (10) in the plastics material.
6. A method as claimed in claim 5, characterised in that two or more parallel gasket recesses (10) are formed in the plastics material.
7. A method as claimed in claim 5 or 6, characterised in that the or each gasket recess (10) is formed by moulding the plastics material (9).
8. A method as claimed in claim 5 or 6, characterised in that the or each gasket recess (10) is formed by machining the plastics material (9).
9. Heat transfer apparatus comprising a pack of pressed metal heat transfer plates each having a pressed groove (8), characterised in that the said pressed groove (8) is at least partially filled with a rigid plastics material (9) which adheres to the plate metal and which is formed in situ with an accurate recess (10) receiving and retaining by a close mechanical fit, a preformed seal (11) of 0-ring, lip or other appropriate type.
EP19800302777 1979-08-13 1980-08-12 Heat transfer plate having a gasket groove and method of forming such a groove Expired EP0024195B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80302777T ATE4936T1 (en) 1979-08-13 1980-08-12 HEAT TRANSFER PLATE WITH A SEALING GROOVE AND METHOD OF MANUFACTURING SUCH SEALING GROOVE.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB7928135 1979-08-13
GB7928135 1979-08-13
GB8000909 1980-01-10
GB8000909 1980-01-10

Publications (3)

Publication Number Publication Date
EP0024195A2 EP0024195A2 (en) 1981-02-25
EP0024195A3 EP0024195A3 (en) 1981-04-22
EP0024195B1 true EP0024195B1 (en) 1983-10-05

Family

ID=26272542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800302777 Expired EP0024195B1 (en) 1979-08-13 1980-08-12 Heat transfer plate having a gasket groove and method of forming such a groove

Country Status (7)

Country Link
EP (1) EP0024195B1 (en)
BR (1) BR8005069A (en)
CA (1) CA1125739A (en)
DE (2) DE3065164D1 (en)
DK (1) DK349180A (en)
ES (1) ES8106603A1 (en)
IN (1) IN154553B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106017159A (en) * 2015-04-29 2016-10-12 青岛中正周和科技发展有限公司 Copper alloy plate heat exchanger

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8505849D0 (en) * 1985-12-11 1985-12-11 Alfa Laval Thermal Ab SEAL FOR PLATE HEAT EXCHANGER
EP1709381B1 (en) * 2003-11-07 2009-04-15 Invensys APV A/S A heat exchanger plate with gasket
DE102014014070A1 (en) 2014-09-29 2016-03-31 Forschungszentrum Jülich GmbH Device for controlled heat transfer to and from a component
CN106052470B (en) * 2015-04-29 2018-01-23 于仁麟 A kind of gasket seal that flow dividing structure is set

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE656365C (en) * 1938-02-04 Bergedorfer Eisenwerk Akt Ges Seal for heat exchange plates
DE1185873B (en) * 1960-01-20 1965-01-21 Leybolds Nachfolger E Method and device for sealing ultra-high vacuum flange connections
GB1095773A (en) * 1964-04-03 1967-12-20 Serck Radiators Ltd Plate-type heat exchangers and plates therefor
FR1430760A (en) * 1965-04-21 1966-03-04 Apv Co Ltd Advanced sealing for flat heat exchanger elements
SE302468B (en) * 1965-12-29 1968-07-22 Alfa Laval Ab
GB1194436A (en) * 1968-05-08 1970-06-10 Nat Res Dev Unions between Tubular Members
GB1273139A (en) * 1968-09-24 1972-05-03 Serck Radiators Ltd Plate heat exchangers or filters
GB1297161A (en) * 1969-01-10 1972-11-22
GB1375942A (en) * 1973-01-05 1974-12-04 Revertex Ltd Fluid pressure seals
US3869963A (en) * 1973-11-09 1975-03-11 Singer Co Hydraulic actuator having a self-aspirating actuator rod seal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106017159A (en) * 2015-04-29 2016-10-12 青岛中正周和科技发展有限公司 Copper alloy plate heat exchanger
CN106017163A (en) * 2015-04-29 2016-10-12 青岛中正周和科技发展有限公司 Plate heat exchanger
CN106017163B (en) * 2015-04-29 2018-03-09 青岛中正周和科技发展有限公司 A kind of plate type heat exchanger
CN106017159B (en) * 2015-04-29 2018-08-14 青岛中正周和科技发展有限公司 A kind of copper alloy plate heat exchanger

Also Published As

Publication number Publication date
DE3065164D1 (en) 1983-11-10
DE24195T1 (en) 1983-08-04
DK349180A (en) 1981-02-14
ES494235A0 (en) 1981-08-16
EP0024195A3 (en) 1981-04-22
EP0024195A2 (en) 1981-02-25
CA1125739A (en) 1982-06-15
BR8005069A (en) 1981-02-24
IN154553B (en) 1984-11-10
ES8106603A1 (en) 1981-08-16

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