EP0614064B1 - Improved closure system for a heat exchanger distributor - Google Patents

Improved closure system for a heat exchanger distributor Download PDF

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Publication number
EP0614064B1
EP0614064B1 EP94200485A EP94200485A EP0614064B1 EP 0614064 B1 EP0614064 B1 EP 0614064B1 EP 94200485 A EP94200485 A EP 94200485A EP 94200485 A EP94200485 A EP 94200485A EP 0614064 B1 EP0614064 B1 EP 0614064B1
Authority
EP
European Patent Office
Prior art keywords
cover
distributor
heat exchanger
door
closure system
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
EP94200485A
Other languages
German (de)
French (fr)
Other versions
EP0614064A2 (en
EP0614064A3 (en
Inventor
Franco Malquori
Paolo Fiore
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.)
Nuovo Pignone Holding SpA
Nuovo Pignone SpA
Original Assignee
Nuovopignone Industrie Meccaniche e Fonderia SpA
Nuovo Pignone SpA
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 Nuovopignone Industrie Meccaniche e Fonderia SpA, Nuovo Pignone SpA filed Critical Nuovopignone Industrie Meccaniche e Fonderia SpA
Publication of EP0614064A2 publication Critical patent/EP0614064A2/en
Publication of EP0614064A3 publication Critical patent/EP0614064A3/en
Application granted granted Critical
Publication of EP0614064B1 publication Critical patent/EP0614064B1/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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/20—Fastening; Joining with threaded elements

Definitions

  • This invention relates to a new closure system for a heat exchanger distributor which, by providing easy access to the distributor interior while maintaining the sealed clamping of the tube plate without the need for independent auxiliary seal members, enables the dimensions of the distributor to be limited with consequent reduction in manufacturing costs, and the down times and hence the relative maintenance costs to be minimized.
  • said clamping is effected via the cover of the distributor which is provided for this purpose with both the adjustable device necessary to form the pressure seal for the cover, and with the adjustable device necessary for clamping the tube plate by the breech lock method.
  • NL-A-8 300 397 in the name of Lummus Nederland N.V. which is the closest prior art document, discloses a distributor for heat exchangers ending with a distributor cover that comprises a central door which must be opened together with the entire cover, when the tube plate has to be inspected.
  • EP-A-0 097 324 in the name of Belleli SpA discloses a distributor in which the tube plate is assembled by segmented circumferential members in order to improve the clamping of the tube plate.
  • the present invention seeks to obviate said drawbacks by providing a closure system for a heat exchanger distributor which enables said additional internal adjustable member for clamping the tube place to be eliminate, while still allowing easy access to the distributor interior.
  • a closure system for the distributor of a heat exchanger comprising inter alia a tube plate sealedly pressed via a gasket against a bearing surface on the end of the heat exchanger shell by a cylindrical presser operated by an adjustment device in a distributor cover and removable partition walls separated from said cover, said cover also being provided with an adjustable device for its sealed clamping through an annular gasket against said distributor characterised in that said cover is provided with a central aperture hermetically sealable by means of a door, and said door is connected to the cover by an independent sealing system constituted by a seal gasket and axial pressers, that can be opened to gain access to the distributor interior without altering the seal at the annular gaskets of the tube plate and of the cover, respectively.
  • said door for hermetically sealing said central aperture in the cover is screwed into said cover and is provided along its circumferential periphery with a screwed series of position-adjustable axial pressers which press a diaphragm against an internal projection provided on said aperture, via the seal gasket.
  • said door is pressed against an internal projection on said aperture, via a gasket, by a circumferential series of axial pressers position-adjustable by screwing, the series being supported by a cylinder retained in position by a sector ring housed in a circumferential recess provided within said aperture.
  • the reference numeral 1 indicates the cylindrical body of a heat exchanger distributor, comprising a hole 2 for fluid entry, a similar fluid exit hole being provided in the distributor body in a diametrically opposite position.
  • the tube plate 3 which, provided with heat transfer tubes 10, is sealedly pressed, via the gasket 4, against the bearing surface 5 on the end 6 of the heat exchanger shell 7 by a cylindrical presser 8 comprising a hole 9 in correspondence with said hole 2 and provided with suitable known seals, not shown in the figure.
  • Said cylindrical presser 8 is operated, via a diaphragm 11, by an adjustment device consisting of a series of threaded pins 12 (only one being visible in the figure for reasons of clarity) distributed circumferentially along the closure cover 13 for the distributor 1.
  • Said cover 13, of the breech lock type is screwed into the distributor 1 to achieve a pressure seal by means of an adjustable clamping device consisting of a second series of threaded pins 14 (only one being visible in the figure for reasons of clarity) which compress said diaphragm 11 and the annular gasket 15 against a projection 16 provided on the interior of the distributor 1.
  • the entering fluid is kept separated from the exit fluid by known partition walls 17 and 18 bolted together and hence easily removable.
  • said cover 13 is provided with a central aperture 19 hermetically sealable by the door 20 which is screwed into the cover 13 and supports along its circumferential periphery a screwed series of position-adjustable axial pressers 21 which, via a diaphragm 22, press the annular gasket 23 against an internal projection 24 provided on said cover 13.
  • said door 20 is pressed against said internal projection 24 on the cover 13, via the annular gasket 23, by means of a circumferential series of axial pressers 21 position-adjustable by screwing into the support cylinder 25, which is held in position by a ring in the form of sectors, respectively 26, 26', 26", 26''', ..., housed in a circumferential recess 27 provided in the cover 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Details Of Measuring And Other Instruments (AREA)
  • Patch Boards (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

A closure system for a heat exchanger distributor in which the cover, of breech lock type, is provided with a central aperture hermetically sealable by a door. Preferred door fastening embodiments are also described. <IMAGE>

Description

  • This invention relates to a new closure system for a heat exchanger distributor which, by providing easy access to the distributor interior while maintaining the sealed clamping of the tube plate without the need for independent auxiliary seal members, enables the dimensions of the distributor to be limited with consequent reduction in manufacturing costs, and the down times and hence the relative maintenance costs to be minimized.
  • In the heat exchanger field there are many known devices for sealedly clamping the tube plate against a suitable bearing surface on the end of the heat exchanger shell via a gasket.
  • In a widely used known device, said clamping is effected via the cover of the distributor which is provided for this purpose with both the adjustable device necessary to form the pressure seal for the cover, and with the adjustable device necessary for clamping the tube plate by the breech lock method.
  • NL-A-8 300 397 in the name of Lummus Nederland N.V., which is the closest prior art document, discloses a distributor for heat exchangers ending with a distributor cover that comprises a central door which must be opened together with the entire cover, when the tube plate has to be inspected.
  • EP-A-0 097 324 in the name of Belleli SpA discloses a distributor in which the tube plate is assembled by segmented circumferential members in order to improve the clamping of the tube plate.
  • It is however always essential to be able to gain access to the interior of the distributor in order to check the functional clamping of the tube plate.
  • This requirement has resulted in the use of an additional adjustable device within the distributor to keep the tube plate clamped in the absence of the cover, with a consequent obvious increase in the distributor length and cost. In addition, access to the distributor interior depends on removing the entire cover, which is not particularly easy.
  • The present invention seeks to obviate said drawbacks by providing a closure system for a heat exchanger distributor which enables said additional internal adjustable member for clamping the tube place to be eliminate, while still allowing easy access to the distributor interior.
  • According to the invention, there is provided a closure system for the distributor of a heat exchanger comprising inter alia a tube plate sealedly pressed via a gasket against a bearing surface on the end of the heat exchanger shell by a cylindrical presser operated by an adjustment device in a distributor cover and removable partition walls separated from said cover, said cover also being provided with an adjustable device for its sealed clamping through an annular gasket against said distributor characterised in that said cover is provided with a central aperture hermetically sealable by means of a door, and said door is connected to the cover by an independent sealing system constituted by a seal gasket and axial pressers, that can be opened to gain access to the distributor interior without altering the seal at the annular gaskets of the tube plate and of the cover, respectively.
  • This avoids the need to remove the cover for any inspection or maintenance work within the distributor, so that this keeps the tube plate tightly clamped during said operations.
  • According to a preferred embodiment of the present invention, said door for hermetically sealing said central aperture in the cover is screwed into said cover and is provided along its circumferential periphery with a screwed series of position-adjustable axial pressers which press a diaphragm against an internal projection provided on said aperture, via the seal gasket.
  • According to a modification of the present invention, said door is pressed against an internal projection on said aperture, via a gasket, by a circumferential series of axial pressers position-adjustable by screwing, the series being supported by a cylinder retained in position by a sector ring housed in a circumferential recess provided within said aperture.
  • The invention is further described hereinafter with reference to the accompanying drawings, which show preferred embodiments thereof by way of non-limiting example only, in that technical or constructional modifications can be made thereto without leaving the scope of the present invention.
  • In said drawings:
  • Figure 1 is a partial view in longitudinal semi-section of a tubular heat exchanger using a distributor closure system according to the invention;
  • Figure 2 is a considerably enlarged section through a modification of the invention.
  • In the figures the reference numeral 1 indicates the cylindrical body of a heat exchanger distributor, comprising a hole 2 for fluid entry, a similar fluid exit hole being provided in the distributor body in a diametrically opposite position. Within said distributor 1 there is housed the tube plate 3 which, provided with heat transfer tubes 10, is sealedly pressed, via the gasket 4, against the bearing surface 5 on the end 6 of the heat exchanger shell 7 by a cylindrical presser 8 comprising a hole 9 in correspondence with said hole 2 and provided with suitable known seals, not shown in the figure. Said cylindrical presser 8 is operated, via a diaphragm 11, by an adjustment device consisting of a series of threaded pins 12 (only one being visible in the figure for reasons of clarity) distributed circumferentially along the closure cover 13 for the distributor 1. Said cover 13, of the breech lock type, is screwed into the distributor 1 to achieve a pressure seal by means of an adjustable clamping device consisting of a second series of threaded pins 14 (only one being visible in the figure for reasons of clarity) which compress said diaphragm 11 and the annular gasket 15 against a projection 16 provided on the interior of the distributor 1. In the distributor 1 the entering fluid is kept separated from the exit fluid by known partition walls 17 and 18 bolted together and hence easily removable.
  • Finally, said cover 13 is provided with a central aperture 19 hermetically sealable by the door 20 which is screwed into the cover 13 and supports along its circumferential periphery a screwed series of position-adjustable axial pressers 21 which, via a diaphragm 22, press the annular gasket 23 against an internal projection 24 provided on said cover 13.
  • In this manner it is necessary only to unscrew said door 20 to gain access to the distributor interior without altering the seal at the annular gaskets 4 and 15.
  • In the modification of Figure 2, said door 20 is pressed against said internal projection 24 on the cover 13, via the annular gasket 23, by means of a circumferential series of axial pressers 21 position-adjustable by screwing into the support cylinder 25, which is held in position by a ring in the form of sectors, respectively 26, 26', 26", 26''', ..., housed in a circumferential recess 27 provided in the cover 13.

Claims (3)

  1. A closure system for the distributor of a heat exchanger comprising inter alia a tube plate (3) sealedly pressed via a gasket (4) against a bearing surface (5) on the end (6) of the heat exchanger shell by a cylindrical presser (8) operated by an adjustment device (12) in a distributor cover (13) and removable partition walls (17, 18) separated from said cover, said cover (13) also being provided with an adjustable device (14) for its sealed clamping through an annular gasket (15) against said distributor characterised in that said cover (13) is provided with a central aperture (19) hermetically sealable by means of a door (20), and said door (20) is connected to the cover (13) by an independent sealing system constituted by a seal gasket (23) and axial pressers (21), that can be opened to gain access to the distributor interior without altering the seal at the annular gaskets (4, 15) of the tube plate (3) and of the cover (13), respectively.
  2. A closure system for the distributor of a heat exchanger as claimed in claim 1, characterised in that said door (20) for hermetically sealing said central aperture (19) in the cover (13) is screwed into said cover and is provided along its circumferential periphery with a screwed series of position-adjustable axial pressers (21) which press a diaphragm (22) against an internal projection (24) provided on said aperture, via the seal gasket (23).
  3. A closure system for the distributor of a heat exchanger as claimed in claim 1, characterised in that said door (20) for hermetically sealing said central aperture (19) in the cover (13) is pressed against an internal projection.
EP94200485A 1993-03-03 1994-02-24 Improved closure system for a heat exchanger distributor Expired - Lifetime EP0614064B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI930404 1993-03-03
ITMI930404A IT1271957B (en) 1993-03-03 1993-03-03 PERFECTED CLOSURE FOR THE DISTRIBUTOR OF A HEAT EXCHANGER

Publications (3)

Publication Number Publication Date
EP0614064A2 EP0614064A2 (en) 1994-09-07
EP0614064A3 EP0614064A3 (en) 1995-05-10
EP0614064B1 true EP0614064B1 (en) 1999-09-01

Family

ID=11365217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94200485A Expired - Lifetime EP0614064B1 (en) 1993-03-03 1994-02-24 Improved closure system for a heat exchanger distributor

Country Status (6)

Country Link
EP (1) EP0614064B1 (en)
AT (1) ATE184103T1 (en)
DE (1) DE69420294T2 (en)
DK (1) DK0614064T3 (en)
ES (1) ES2134892T3 (en)
IT (1) IT1271957B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009534624A (en) * 2006-04-21 2009-09-24 ラーセン アンド トーブロ リミテッド Sealing structure of inner tube sheet of tubular heat exchanger
JP2010503815A (en) * 2006-05-09 2010-02-04 ラーセン アンド トーブロ リミテッド Threaded channel closure for tube heat exchangers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2552210C1 (en) * 2013-12-26 2015-06-10 Открытое акционерное общество "Волгограднефтемаш" Gate valve of distributing chamber for heat exchanger

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB520961A (en) * 1938-11-04 1940-05-08 Lummus Co Improvements in or relating to tubular heat exchangers
US2363526A (en) * 1940-07-31 1944-11-28 James C Hobbs Heat exchanger
US4630673A (en) * 1982-06-21 1986-12-23 Belleli S.P.A. Clamping assembly heat exchanger tube plates
NL8300397A (en) * 1983-02-03 1984-09-03 Lummus Nederland B V Heat-exchanger with pipe bundle - has heat-shield casing with sliding joints between union and pipe plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009534624A (en) * 2006-04-21 2009-09-24 ラーセン アンド トーブロ リミテッド Sealing structure of inner tube sheet of tubular heat exchanger
KR101479565B1 (en) * 2006-04-21 2015-01-06 랄센 앤 터브로 리미티드 Sealing arrangement for internal tubesheet for tubular heat exchangers
JP2010503815A (en) * 2006-05-09 2010-02-04 ラーセン アンド トーブロ リミテッド Threaded channel closure for tube heat exchangers

Also Published As

Publication number Publication date
DE69420294D1 (en) 1999-10-07
DE69420294T2 (en) 2000-05-18
ITMI930404A0 (en) 1993-03-03
IT1271957B (en) 1997-06-10
ATE184103T1 (en) 1999-09-15
EP0614064A2 (en) 1994-09-07
DK0614064T3 (en) 1999-12-13
ITMI930404A1 (en) 1994-09-03
ES2134892T3 (en) 1999-10-16
EP0614064A3 (en) 1995-05-10

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