EP2131134B1 - A method for applying a closing plate to an end of a tubular element - Google Patents

A method for applying a closing plate to an end of a tubular element Download PDF

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Publication number
EP2131134B1
EP2131134B1 EP09161571.6A EP09161571A EP2131134B1 EP 2131134 B1 EP2131134 B1 EP 2131134B1 EP 09161571 A EP09161571 A EP 09161571A EP 2131134 B1 EP2131134 B1 EP 2131134B1
Authority
EP
European Patent Office
Prior art keywords
tubular element
plate
annular seating
annular
perimeter
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.)
Active
Application number
EP09161571.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2131134A3 (en
EP2131134A2 (en
Inventor
Valter Lolli
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.)
Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to PL09161571T priority Critical patent/PL2131134T3/pl
Priority to SI200931106T priority patent/SI2131134T1/sl
Publication of EP2131134A2 publication Critical patent/EP2131134A2/en
Publication of EP2131134A3 publication Critical patent/EP2131134A3/en
Application granted granted Critical
Publication of EP2131134B1 publication Critical patent/EP2131134B1/en
Priority to HRP20141252TT priority patent/HRP20141252T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • F28F9/262Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
    • F28F9/268Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by permanent joints, e.g. by welding
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0035Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for domestic or space heating, e.g. heating radiators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2220/00Closure means, e.g. end caps on header boxes or plugs on conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00Fastening; Joining
    • F28F2275/12Fastening; Joining by methods involving deformation of the elements
    • F28F2275/122Fastening; Joining by methods involving deformation of the elements by crimping, caulking or clinching

Definitions

  • the present invention relates to an original method for applying a metal plate to an end of a tubular element, also made of metal, with the aim of closing a head thereof.
  • heating radiators which are constituted by a pair of manifolds, arranged vertically, mutually parallel and interconnected by a plurality of conduits, arranged perpendicular at different heights.
  • the upper and lower ends of the vertical manifolds are closed by relative plates having profiles which correspond to the section of the manifolds themselves, which are preferably semi-oval.
  • the plates can be solid or can afford, in a central zone thereof, a threaded collar for connection of the radiator to the water line of the heating plant.
  • a first known method comprises welding the plate to the tubular element, with the drawbacks which this leads to in terms of time and costs for the use of specialised personnel, needed not only for the welding, but also for the following lapping and seal control operations.
  • a further known method includes realising, in the edge of the plate: a small step destined to define a rest for the tubular element and for centring, with respect to the tubular element, the plate itself, thanks to its partial insertion in the mouth of the tubular element.
  • the result of the operation in particular in relation to the seal, depends on a correct spreading of the paste over the whole contact perimeter.
  • PCT/EP2007061948 relating to a "Plate couplable to an opening edge provided in a tubular element, and a method for constraining the plate to the edge.
  • the above application relates to a plate internally provided with a first annular channel in which a ring of low-fusion point brazing material is blocked; further annular channels are arrayed spoke-fashion from the first annular channel and extend towards the edge.
  • the junction line between the plate and the tubular element is on the flanks thereof; if the fixing is done by welding, the aesthetic result is not appealing even after lapping, while with the heat-welding paste or the ring of fusible material the situation is improved, although the line is still visible as it is highlighted by the subsequent enamelling.
  • DE3936251 which represents the preamble of claim 1 discloses a refrigerant receiver for use in motor vehicle air conditioner, which has a tubular body, in which an annular seating is afforded at one of its open ends, the seating being defined by an upper and a lower projection made by means of electromagnetic forming.
  • DE3936251 also discloses a bottom closure with an obliquely inclined perimeter which gives the closure a truncoconical conformation, with the peripheral edge of the bottom closure being clamped between the lower and the upper projection.
  • the aim of the present invention is to provide a method for applying a closing plate to the end of a tubular element, which enables obtaining a mechanically stable joint without the use of any extra material, and which at the same time guarantees an aesthetically improved result with respect to what can be obtained with traditional methods.
  • a further aim of the invention relates to the providing of a valid method even where a sealed coupling is to be achieved, by predisposing special operating and/or enactment stages which are similar to those in the prior art.
  • a still further aim of the process consists in being defined by simple and rapid actuation stages, which can be realised with constant results, using equipment having contained costs and independently of the ability of the personnel doing the operations.
  • a further aim of the invention is to provide a method which can be used both with solid plates and with plates having a threaded central sleeve.
  • 1 denotes a metal tubular element, for example a metal tubular element 1 which is of the type used in a thermal radiator for installation in a bathroom, and is applicable to one of the two vertical manifolds, to which reference was made in the preamble hereto.
  • the ends of the tubular element 1 are destined to be sealedly closed by metal plates which can be solid, as in a first embodiment denoted by 2, or, in a second embodiment denoted by 20, can afford a sleeve 21 in a central zone thereof, which sleeve 21 is internally threaded for connecting the radiator to the water line of the heating plant ( figure 1 ).
  • the method of the present invention concerns stages which involve both the preparation of the end of the tubular element 1 and the realisation of the plate 2, 20 and stages which relate to mutual assembly thereof.
  • the preparation of the end of the tubular element consists in realising, in the mouth 10 thereof, an annular seating 12 having a predetermined depth P shaped to define a perimeter rest step 13 in a relative bottom situated internally of the tubular element 1.
  • the annular seating 12 is obtained by means of successive operations of cold plastic deformation, in particular:
  • annular lip 11 is thus defined externally on the annular seating 12, which lip 11 is slimmer than the border of the tubular element 1 (see also figure 3 ).
  • a stage of rounding the edge 110 of the annular lip ( figure 4 ) is included in the preparation of the tubular element 1.
  • the realisation of the plate 2, 20 involves shaping it (in plan view) such as to obtain a profile which is complementary to the profile of the annular seating 12 ( figure 1 ), with a cutting action such that the perimeter surfaces 22 which result have an oblique inclination, thus determining a truncoconical conformation of the plate 2, 20 ( figure 2 ), the thickness S of which must be equal to the depth P of the annular seating 12, at least over a certain width of the relative perimeter edge 23.
  • the plate 2, 20 is preferably fashioned from a flat metal sheet having a constant thickness S, which is equal to the thickness S of the depth P of the seating 12.
  • the stage of realisation includes drawing, perforating and tapping operations, apart from the operations described above.
  • Sealing means 30 are associated to the plates 2, 20 of the embodiment, which sealing means 30 are destined to guarantee liquid seal of the coupling between the plates 2, 20 and the tubular element 1; the sealing means 30, not illustrated in detail, are advantageously of the type described in the patent application mentioned herein above, and comprise a ring 31 of low-fusion point brazing material, schematically denoted by broken lines in figure 2 .
  • the ring 31 is fixed by friction force to an annular channel 32 (visible in the plate 20 in figure 2 ) connected to other channels developing spoke-fashion towards the edge (not illustrated).
  • the stages of the method for application of the plate 2, 20 to the tubular element 1 comprise:
  • the method comprises a supplementary stage, using the sealing means 30.
  • this stage consists in heating the tubular element-plate assembly to a temperature above the fusion temperature of the ring 31, for a predetermined time, followed by a cooling of the assembly in order to obtain a new solidification of the metal of the ring 31, distributed in the contact zones between the plate 2, 20 and the tubular element 1.
  • the sealed coupling between the plate 2, 20 and the tubular element 1 can obviously be realised, alternatively to what has been described, by a bead of heat-welding paste, mentioned in the preamble, distribution, in preparation, between the contact zones.
  • the plate is unremovably fixed merely by mechanical action, entirely contrary to all the known solutions, thanks to the snug fit created by the profiling of the annular lip of the tubular element.
  • the conformation of the seating, and consequently the plate locates the joint line between the two parts in the head of the tubular element, thus in a much less visible zone than on the flank; this leads to obvious benefits from the overall aesthetic point of view.
  • joint line lies on a plane, so that any lapping or sanding operations which might be desired to further reduce the visibility of the line are evidently very simple and effective.
  • the described method enables easily obtaining couplings with or without seal, according to needs.
  • the need to realise the step in the edge of the plate is eliminated and, consequently, the plate can be slimmer; by way of example, metal sheeting of 2 mm thickness can be used instead of the 3.5 mm thickness required for prior-art plates.
  • the proposed method is advantageous, in general, for all cases in which the application of a metal plate for closing the head of a metal tube is required; in the particular technical sector of the described example, the fact that all the coupling stages of the plate are the same both when the plate is solid and when it is provided with a threaded central sleeve is much appreciated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pipe Accessories (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)
EP09161571.6A 2008-06-06 2009-05-29 A method for applying a closing plate to an end of a tubular element Active EP2131134B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL09161571T PL2131134T3 (pl) 2008-06-06 2009-05-29 Sposób nakładania płyty zamykającej na koniec elementu rurowego
SI200931106T SI2131134T1 (sl) 2008-06-06 2009-05-29 Metoda za namestitev zaključne plošče na konec cevastega elementa
HRP20141252TT HRP20141252T1 (hr) 2008-06-06 2014-12-22 Postupak stavljanja završne ploäśice na kraj tubularnog elementa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000357A ITBO20080357A1 (it) 2008-06-06 2008-06-06 Metodo per l applicazione di una piastrina di chiusura all estremita di un elemento tubolare

Publications (3)

Publication Number Publication Date
EP2131134A2 EP2131134A2 (en) 2009-12-09
EP2131134A3 EP2131134A3 (en) 2011-01-19
EP2131134B1 true EP2131134B1 (en) 2014-10-22

Family

ID=40301546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09161571.6A Active EP2131134B1 (en) 2008-06-06 2009-05-29 A method for applying a closing plate to an end of a tubular element

Country Status (8)

Country Link
EP (1) EP2131134B1 (es)
DK (1) DK2131134T3 (es)
ES (1) ES2528187T3 (es)
HR (1) HRP20141252T1 (es)
IT (1) ITBO20080357A1 (es)
PL (1) PL2131134T3 (es)
PT (1) PT2131134E (es)
SI (1) SI2131134T1 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20110676A1 (it) * 2011-11-28 2013-05-29 Valter Lolli Piastrina di chiusura per elementi tubolari e metodo per realizzarla

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB553626A (en) * 1942-04-25 1943-05-28 Bundy Tubing Co Improvements in the manufacture of metal tubes having sealed ends
JPH0264855U (es) * 1988-10-31 1990-05-16
US5224358A (en) * 1990-10-04 1993-07-06 Nippondenso Co., Ltd. Refrigerating apparatus and modulator
DE10066393B4 (de) * 1999-09-10 2018-09-20 Mahle International Gmbh Kondensator
US6453697B1 (en) * 2001-04-23 2002-09-24 Designed Metal Products, Inc. Seal for vessel and method of forming same
JP2003083698A (ja) * 2001-09-07 2003-03-19 Sanden Corp 熱交換器および熱交換器の製造方法
BRPI0418728A (pt) * 2004-04-22 2007-09-11 Gropallo Francesco processo de brasagem em forno

Also Published As

Publication number Publication date
EP2131134A3 (en) 2011-01-19
HRP20141252T1 (hr) 2015-04-24
PT2131134E (pt) 2015-01-14
SI2131134T1 (sl) 2015-03-31
PL2131134T3 (pl) 2015-04-30
ES2528187T3 (es) 2015-02-05
DK2131134T3 (en) 2015-01-19
ITBO20080357A1 (it) 2009-12-07
EP2131134A2 (en) 2009-12-09

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