EP1679482A2 - Entretoise pour radiateur tubulaire - Google Patents

Entretoise pour radiateur tubulaire Download PDF

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Publication number
EP1679482A2
EP1679482A2 EP05028179A EP05028179A EP1679482A2 EP 1679482 A2 EP1679482 A2 EP 1679482A2 EP 05028179 A EP05028179 A EP 05028179A EP 05028179 A EP05028179 A EP 05028179A EP 1679482 A2 EP1679482 A2 EP 1679482A2
Authority
EP
European Patent Office
Prior art keywords
spacers
tubular elements
radiator
screws
holes
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.)
Withdrawn
Application number
EP05028179A
Other languages
German (de)
English (en)
Other versions
EP1679482A3 (fr
Inventor
Stefano Ragaini
Paolo Ragaini
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.)
Rag All SpA
Original Assignee
Rag All 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
Priority claimed from ITAN20050001 external-priority patent/ITAN20050001A1/it
Priority claimed from ITAN20050040 external-priority patent/ITAN20050040A1/it
Application filed by Rag All SpA filed Critical Rag All SpA
Publication of EP1679482A2 publication Critical patent/EP1679482A2/fr
Publication of EP1679482A3 publication Critical patent/EP1679482A3/fr
Withdrawn legal-status Critical Current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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
    • F28F9/264—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by sleeves, nipples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means

Definitions

  • the present patent relates to a tubular radiator for space heating or similar applications and to the main components of the radiator, which is preferably made of aluminium alloy.
  • Radiators for space heating with tubular elements are made of profile sections hereinafter referred to as tubular elements.
  • tubular elements have thermal carrier fluid distribution pipes and are placed between spacers, to which they are hydraulically connected by means of special holes.
  • the spacers in turn, have
  • Distribution pipes are normally connected in parallel though it is sometimes possible to connect several groups of parallel distribution pipes in series by simply placing suitable diaphragms in the inlet and outlet manifolds using known methods.
  • the spacers can be classified as:
  • a first type uses a type of nipple with two threaded male ends, respectively with right and left threading, which are simultaneously screwed to the sides of two adjacent tubular elements and used as intermediate spacers.
  • This solution as used in die-cast aluminium or cast-iron element radiators, is not suitable for tubular elements.
  • the tubular elements must be much thicker than requirements dictated by sturdiness alone otherwise the threaded housing will not be deep enough.
  • a second problem is of an aesthetic nature: screwing must be totally symmetrical with the nipple fully flush with both ends to hide the threads and the sealants (hemp and/or putty) must also be completely clean.
  • a second type of assembly substantially uses hollow metal sections soldered to the sides of the two adjacent tubular elements as intermediate spacers.
  • a first problem derives from the fact that when soldering is performed, special attention must be paid to appearance, which means that is usually necessary to brush and/or paint the entire radiator after soldering; furthermore this solution may also require tubular elements that are much thicker than requirements dictated by sturdiness alone.
  • the metal alloys of the two elements that are soldered together must be solder-compatible, which restricts the choice of materials and finishes for aesthetic reasons.
  • Another significant problem linked with this technology is that if the required heating power is not correctly calculated, it is generally necessary to replace the radiator since the number of elements cannot be modified by the installer.
  • radiator must be assembled, as is indeed the case for all known radiators, using special positioning templates in the production plant.
  • radiators although they use only a few basic elements, must be available in a wide range of heating power and dimensions, they must be prepared to order and involve considerable organizational costs for both manufacturer and installer. In short, the potential advantages of the modularity of tubular radiators are not fully exploited. The possibility of providing installers with a few basic elements that can be assembled in any model would be extremely desirable.
  • a third type of assembly would substantially use internally perforated sections as intermediate spacers and assembly would involve using a tie bar that fastens the whole block of spacers and tubular elements together whereas seals would guarantee water-tightness, "would" being the operative word since although this solution is well-known, it is not used because assembly is complex and unreliable.
  • the end spacers i.e. the spacers referred to herein as connector spacers and end spacers
  • the spacers referred to herein as connector spacers and end spacers may be special parts or intermediate spacers connected to a special part, either a connection to the shut-off devices of the heating system or a plug respectively, the latter of which is fitted with a bleeder valve.
  • bonnet Due to the problems caused by the use of spacers, a sort of bonnet is often used. This has a central part that is glued or soldered to the end of each tubular element and two side parts shaped like a hub for connection to the bonnets of the adjacent tubular elements. There is a T-shaped passage inside the bonnets whose central outlet is connected to the distribution pipe of the tubular element whereas the side outlets are connected to the corresponding parts of the adjacent tubular elements.
  • These bonnets are usually made of die-cast aluminium and are connected to each other in exactly the same way as die-cast aluminium radiators, i.e.
  • the tubular elements can also be connected by manifold channels placed in the rear. This creates limitations in the design of the tubular elements and implies moving the internal channel in which the thermal carrier fluid flows to the rear.
  • a first aim of this invention is to simplify the production process of the elements of tubular radiators.
  • a second aim of this invention is to simplify tubular radiator assembly so that installers are able to assemble them without the need for special equipment.
  • a third aim of this invention is to make cleaning and/or painting of the tubular radiators unnecessary.
  • a fourth aim of this invention is to allow non-destructive disassembly of tubular radiators.
  • a fifth aim of this invention is to simplify the administrative management necessary when preparing models without reducing the size of range.
  • a sixth aim of this invention is to significantly improve the appearance of tubular radiators.
  • a seventh aim of this invention is to facilitate assembly of tubular radiators in which each tubular element has more than one distribution pipe.
  • a final aim of this invention is to increase the range of aesthetic and/or functional variations of tubular elements and/or spacers without affecting administrative management.
  • the invention will be substantially described according to two of the possible forms; they will be described one after the other with different versions provided for each one.
  • Fig. 1 shows a side and front view of a tubular radiator according to the known state of the art or the invention with the sole purpose of identifying the main parts.
  • Figures 2 to 9 show a first main form of the invention.
  • Fig. 2 shows a side view and a cross-section from below of an end of a tubular element according to the invention.
  • Fig. 3 shows from left to right a first face, a first vertical cross-section A-A and a second vertical cross-section B-B of a spacer according to a preferred first version of the invention.
  • Fig. 4 shows a second face of the same spacer in Fig. 3.
  • Fig. 5 shows a possible connecting screw between two consecutive spacers according to the invention.
  • Fig. 6 shows, according to two positions that have been rotated, a first face of a spacer according to another version of the invention that is an alternative to the first version in Figs. 3 and 4.
  • Fig. 7 shows a side view and partial cross-section according to axis E-E and according to a front cross-section of an assembly of tubular elements and spacers according to the invention.
  • Fig. 8 shows a side view, according to a front cross-section B-B and cross-section from below C-C, of an assembly of tubular elements and spacers according to the invention.
  • Fig. 9 shows a cross-section from below C-C of an assembly of tubular elements with several distribution pipes according to the invention.
  • Figures 10 to 12 show a second main form of the invention.
  • Fig. 10 is a front view of the bottom end of two assembled elements of a tubular radiator according to the invention since the other end is identical.
  • Fig. 11 shows a cross-section, according to axis A-A in Fig. 10, of the main components of a tubular radiator according to the invention in disassembled form.
  • Fig. 12 shows a cross-section, according to axis A-A in Fig. 10, of two elements of a tubular radiator according to the invention in assembled form.
  • Fig. 1 shows a radiator R with tubular elements hereinafter simply referred to as radiator R for the sake of brevity, with the possible flow of thermal carrier fluid indicated by two arrows entering and exiting the radiator.
  • Radiator R comprises one or more tubular elements 1 placed between spacers indicated on a general level with the number 2; more specifically, the sides of the tubular elements 1 corresponding with the upper and lower ends, are fastened to connector spacers 2.c, connected to the heating system or fastened to intermediate spacers 2.i, which connect each tubular element 1 to the next one or to end spacers 2.t.
  • the thermal carrier fluid inlet and outlet manifolds consist of the sequence of said spacers 2 and the ends of the tubular elements 1 placed between them.
  • Fig. 2 of a tubular element 1 shows a distribution pipe 1.1 with passages 1.2 for hydraulically connecting said distribution pipe 1.1 to spacers 2 and through holes 1.3 outside said distribution pipe 1.1.
  • the spacers 2 and tubular elements 1 are assembled by fastening each end of said tubular elements 1 between two consecutive spacers 2, whether they are intermediate 2.i or end spacers 2.t or 2.c, using screws 3 that, when each one is inserted in a first type of through hole 2.1 of any spacer 2, come to rest on a housing 2.11 for the heads of said screws 2, then cross tubular element 1 by means of the corresponding through holes 1.3, and are finally inserted into the second type of hole 2.2 of the next spacer 2.
  • the means used to ensure that said screws 3 are engaged in said mounting holes 2.2 can be different and the preferred type will be discussed below.
  • the intermediate spacers 2.i and connectors 2.c at least, have a special passage 2.3 that, when connected together, corresponds to the passages 1.2 of the tubular elements 1 so that the thermal carrier fluid can be distributed along the distribution pipes 1.1 present in said tubular elements 1.
  • Fig. 7 shows the assembly of an undefined number of elements that, in this specific example, run from left to right in a radiator R according to the invention.
  • the tubular elements 1 must be simultaneously fastened at both ends. If radiator R has an inlet and outlet as shown in Fig. 1, an end spacer 2.t is used to start below and a connector spacer 2.c above.
  • a first tubular element 1 is placed next to each one followed, both above and below, by a first intermediate spacer 2.i fastened with screws 3 to said terminal 2.t or connector 2.c spacers; an additional tubular element 1 will be placed alongside the first intermediate spacers 2.i and then additional intermediate spacers 2.i whose screws 3 will be engaged on the mounting holes 2.2 of the first intermediate spacers 2.i and so on until a connector spacer 2.c is assembled below and an end spacer 2.t above to complete the sequence.
  • Fig. 8 also shows the plugs 7 that, in a known manner, block the ends of the distribution pipes 1.1.
  • each tubular element 1 is fastened by only two screws 3 that are alternatively inserted in only one of the two pairs of through holes 1.3 diagonally opposite the passages 1.2.
  • the intermediate spacer 2 has housings 2.11 on one face only, but the through holes 2.1 or mounting holes 2.2 are placed at the same angular distance ⁇ , so that a series of said intermediate spacers 2 can be correctly joined together by rotating each one by + ⁇ and - ⁇ . Since said intermediate spacers 2 are preferably obtained from extruded profile sections, in particular aluminium alloy, and said housings 2.11 are effected as secondary milling operations.
  • This second version has the advantage that it requires milling on one face only.
  • the connector spacers 2.c (refer to Fig. 7 and Fig. 8, in particular) can be simply obtained from general spacers 2 whose passage 2.3 consists of a threaded hole with a special connection 5 screwed to the heating system; in the figures, for the sake of simplicity, connection 5 is shown as a nipple although it is usually a union. Alternatively, there is no reason why the connector spacers 2.c should not be special parts with a face that can be directly connected to the heating system by means of through holes 2.1 and mounting holes 2.2.
  • the end spacers 2.t are obtained from said spacers 2, whose passage 2.3 consists of a threaded hole that plug 6 with a bleeder valve 6.1, if necessary, is screwed into (see Fig. 7), or consist of a plug with through holes 2.1 and mounting holes 2.2.
  • the first consists in using a cylindrical screw 3 and placing an insert with female threading in said mounting holes 2.2; this may simply be a nut or a bushing forced into a special housing of the mounting holes 2.2; this version is not shown in the figures.
  • the housing must be located at the end of the mounting hole 2.2 opposite the screw 3 insertion end; all the considerations made above for the screw 3 head housing 2.11 also apply to this housing if you wish to avoid having two versions of spacer 2, with one being a mirror image of the other.
  • the second solution consists in the use of a cylindrical screw 3 and in threading the mounting holes 2.2.
  • the third solution that is to be preferred for its simplicity consists in the use of a self-threading screw 3 that threads said mounting holes 2.2 when inserted.
  • a self-threading screw 3 that threads said mounting holes 2.2 when inserted.
  • the materials used to make said spacers 2, steel or aluminium alloys, are suitable for threading by self-threading screws.
  • diaphragms used to connect several consecutive groups of parallel distribution pipes 1.1 in series for thermal carrier fluid circulation they may simply consist of disc-shaped seals installed in the same housings 2.31 used for seals 4.
  • Correct assembly of radiator R according to the invention may be performed without using positioning templates if the diameter of through holes 2.1 and through holes 1.3 is slightly larger than the diameter of screws 3 and the screws can therefore be used as centring devices.
  • tubular elements with more than one distribution pipe 1.1 would be almost impossible if assembly were performed using left or right-hand threaded nipples and very difficult if soldering were to be used.
  • tubular elements 1 that have more than one distribution pipe 1.1 are substantially assembled as described in Fig. 7 by placing a spacer 2 with a single passage 2.3 next to each passage 1.2 or by using spacers 2 with the same number of passages 2.3 as distribution pipes 1.1 on a single tubular element 1. All that is then required is to connect the connector spacers 2.c or use a connector spacer 2.c with several passages 2.3 and internal connections 2.4 between said passages 2.3.
  • radiators obviously have greater heating power for the same amount of occupied wall space.
  • tubular elements 1 is available to installers that vary according to materials used, shape or profile, finish or colour that can be interchanged and connected to spacers 2, which also vary according to materials and/or appearance but are interchangeable.
  • Figure 10 shows the connector spacer labelled 12 to indicate the main difference between the intermediate spacer 2.i described above.
  • Fig. 10 also shows an end element 6 according to the known state of the art; in the example in the figure, it consists of a plug but it may also be a connection fitting linked to the heating system or a bleed valve.
  • FIG. 11 shows a tubular element 1 with a distribution pipe 1.1 and two holes 1.4 for hydraulic connection to the tubular elements 1 next to the heating system.
  • One of the two holes 1.4 has right-hand female threading and the other left-hand.
  • nipple 9 with threaded ends 9.1, respectively with right and left threading, to be screwed into said holes 1.4.
  • the nipple 9 according to the state of the art, has at least part of the internal cavity 9.2 passing from end to end shaped so that a special wrench can be used for screwing (a socket head screw in the figure shown).
  • the figure also shows a bushing with shoulders 10.1 against which water-proof seals 4, O-rings in the figure, are placed; the bushing 10 has a through hole 10.2 that holds the nipple 9, preferably with very little clearance (tenths of a millimetre).
  • the seals 4 are therefore placed in a housing consisting of shoulders 10.1 and walls of the through hole 11.1.
  • the spacer 12 comprises the components that have been described above, namely the nipple 9, bushing 10, seals 4, collar 11.
  • the assembly of two consecutive tubular elements 1 occurs by preassembling said components, nipple 9, bushing 10, seals 4, collar 11 and then by simultaneously screwing the threaded ends 9.1 of nipple 9 to the corresponding holes 1.4 of the two adjacent tubular elements.
  • a special wrench is used for screwing so that it is possible to reach the internal cavity 9.2 when placed in one of the holes 1.4 next to those into which nipple 9 is being screwed.
  • length D4 of collar 11 must be at least a few tenths of a millimetre more than length D1 of bushing 10, but less than the sum of D3 + D2 + D3 corresponding to the overall dimensions of two seals 4 distanced from the shoulders 10.1.
  • the bushing 10 with seals 4 can be used to ensure water-tightness as well as for spacing purposes; the example in Fig. 11 shows the version of bushing 10.a with housings 10.1a that contains and conceals the seals 4 and establishes a distance between the two consecutive tubular elements 1 equal to its length D1.
  • the bushing 10 should preferably be made of brass since this turns easily in a lathe whereas, for aesthetic reasons, the exposed components should be manufactured using the same technology and same materials as the tubular elements 1, which usually consist of aluminium alloys that are difficult to machine.
  • bushing 10.a is more difficult to use in a lathe and requires secondary machining operations of the semi-finished product to effect the second housing 10.1a

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
EP05028179A 2005-01-10 2005-12-22 Entretoise pour radiateur tubulaire Withdrawn EP1679482A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITAN20050001 ITAN20050001A1 (it) 2005-01-10 2005-01-10 Distanziale per radiatori in elementi tubolari
ITAN20050040 ITAN20050040A1 (it) 2005-08-01 2005-08-01 Distanziale con nipplo per radiatori in elementi tubolari

Publications (2)

Publication Number Publication Date
EP1679482A2 true EP1679482A2 (fr) 2006-07-12
EP1679482A3 EP1679482A3 (fr) 2009-04-01

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EP05028179A Withdrawn EP1679482A3 (fr) 2005-01-10 2005-12-22 Entretoise pour radiateur tubulaire

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EP (1) EP1679482A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2918165A1 (fr) * 2007-06-29 2009-01-02 Dupraz En Soc Par Actions Simp Enchangeur atmospherique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR559259A (fr) * 1921-12-01 1923-09-12 Radiateur en tôle
DE454967C (de) * 1926-06-12 1928-01-20 Wilhelm Burkart Radiatorgliederverbindung
FR697543A (fr) * 1929-06-18 1931-01-19 Sarina S A Ets Dispositif de raccord pour les éléments de radiateurs en tôle
US2449052A (en) * 1945-01-13 1948-09-14 Brown Fintube Co Heat exchanger
DE1679371A1 (de) * 1967-02-27 1971-03-18 Kirsch Fa Bernhard Vorrichtung zum Verbinden von zwei oder mehreren Radiatorengliedern
US4573527A (en) * 1983-07-29 1986-03-04 Mcdonough M J Heat exchanger closure connection
EP1382929A2 (fr) * 2002-07-17 2004-01-21 Kalor Thermotechnik GmbH Radiateur à tubes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR559259A (fr) * 1921-12-01 1923-09-12 Radiateur en tôle
DE454967C (de) * 1926-06-12 1928-01-20 Wilhelm Burkart Radiatorgliederverbindung
FR697543A (fr) * 1929-06-18 1931-01-19 Sarina S A Ets Dispositif de raccord pour les éléments de radiateurs en tôle
US2449052A (en) * 1945-01-13 1948-09-14 Brown Fintube Co Heat exchanger
DE1679371A1 (de) * 1967-02-27 1971-03-18 Kirsch Fa Bernhard Vorrichtung zum Verbinden von zwei oder mehreren Radiatorengliedern
US4573527A (en) * 1983-07-29 1986-03-04 Mcdonough M J Heat exchanger closure connection
EP1382929A2 (fr) * 2002-07-17 2004-01-21 Kalor Thermotechnik GmbH Radiateur à tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2918165A1 (fr) * 2007-06-29 2009-01-02 Dupraz En Soc Par Actions Simp Enchangeur atmospherique

Also Published As

Publication number Publication date
EP1679482A3 (fr) 2009-04-01

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