EP0777096B1 - Process for manufacturing a heat exchanger for fuel-heated apparatus for heating water - Google Patents
Process for manufacturing a heat exchanger for fuel-heated apparatus for heating water Download PDFInfo
- Publication number
- EP0777096B1 EP0777096B1 EP96118071A EP96118071A EP0777096B1 EP 0777096 B1 EP0777096 B1 EP 0777096B1 EP 96118071 A EP96118071 A EP 96118071A EP 96118071 A EP96118071 A EP 96118071A EP 0777096 B1 EP0777096 B1 EP 0777096B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plates
- bulges
- panels
- weldings
- heat exchanger
- 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
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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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
- F28F3/14—Elements constructed in the shape of a hollow panel, e.g. with channels by separating portions of a pair of joined sheets to form channels, e.g. by inflation
Definitions
- the invention relates to a method for producing Heat exchangers for fuel-heated devices, esp. Hot water boiler, two levels consisting of metal Sheets laid one on top of the other, along the edges are welded and the panels by several of the Edges of spaced welds, all parallel run to each other, be connected, the Weldings are interrupted and the interruptions Form sections and then the so together welded sheets are bent in an S-shape, so that the Sections across the welds, arched transitions form between flat, stacked sections, and the panels are then opened by introducing a Pressure medium for the formation of water channels by bulging the Sheets are deformed between the welds so that the water when operating the heat exchanger in S-shaped Pathways flows.
- the invention has for its object the manufacture of Simplify the heat exchanger mentioned above so that with a reasonable technical effort also in the area of Transitions a large mutual distance between the arches can be ensured, the invention even the Opportunity to achieve arc distances that are larger are as in the area of the remaining sections of the boards or in Area of straight sections.
- the panels are provided according to the invention welding with bulges to form the outer arcuate transitions.
- the tables are made accordingly no longer used as flat structures, but as panels that already in the areas of the later overflows Bulges are provided. But preferably those sections of the panels that later become the inner ones Form arches, not preformed. It goes without saying that the extent of the bulge the later arch shape of transitions. So become bigger Bulges are provided accordingly large radii and accordingly large passage cross-sections in the area of the transitions of the heat exchanger.
- the basic body for the manufacture of the heat exchanger consists of two panels 1 of essentially the same size made of sheet metal.
- the panels 1, however, are not complete just, but pre-treated. They point parallel to each other about u-shaped bulges 22 which extend across extend the panels 1 and extend at the top panel 1 upwards and at the bottom panel 1 downwards extend by half a division offset against each other.
- the panels 1 are - with those mentioned below Exceptions - on the outer edges 2 with each other welded. There is no such thing in the corners at 3 either Welding provided because here at the finished Heat exchangers at 4 the inlet and at 5 the outlet for the water to be treated is arranged. At a distance of the edges of the panels 1 are still parallel and welds running transversely to the bulges 22 6 provided that separated in the finished heat exchanger Should limit channels 7 that are not through Welding interrupted sections 8 lead to the finished heat exchanger arcuate transitions 9 arise leave, while the channels 7 flat sections 10 let arise. As can be seen from the drawing, are the bulges 22 in the area of Transitions 9 because they have special meaning here receive.
- the deformation of the base body, in particular to form the Water channels in sections 10 are made using a die 4, which is formed from five parts.
- the Parts 11-13 are on one side, parts 14, 15 on the other side.
- the parts are in the sense of Arrows 16, 17 can be moved in opposite directions.
- a pressure medium e.g. pressure oil introduced.
- a permanent deformation is achieved after bulges 18 have occurred.
- This Deformation is shown in Fig. 5, but on it is referred to that the opposite Parts of the die may also be provided with projections can to the shape of the bulges 18 influence and relieve the weld connections.
- the corner sections 3 are specially shaped in order to or to form the outlet of the heat exchanger.
- the water to be heated is directed towards channels 7 led and redirected in the transitions 9 and from there in the channels 7 of the following section 10 out.
- the Flue gases or combustion gases are in the right angle to the channels 7 between two Sections 10 out. So under these conditions the flue gases can also be guided in an S-shape, are the sections 10 offset from each other.
- the Dislocations and recesses are at 20 in FIG. 1 shown. As a result of these recesses, the Heat exchanger adjacent walls of the boiler housing be kept flat. Such training of the Heat exchanger is in German Patent 37 01 362 described.
Landscapes
- 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)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von Wärmetauschern für brennstoffbeheizte Vorrichtungen, insb. Warmwasserheizkessel, wobei zwei ebene aus Metall bestehende Tafeln übereinander gelegt, an den Rändern miteinander verschweißt werden und wobei die Tafeln durch mehrere von den Rändern beabstandete Verschweißungen, die alle parallel zueinander verlaufen, miteinander verbunden werden, wobei die Verschweißungen unterbrochen sind und die Unterbrechungen Sektionen bilden und anschließend die so miteinander verschweißten Tafeln s-förmig verbogen werden, so dass die Sektionen quer zu den Verschweißungen, bogenförmige Übergänge zwischen ebenen, übereinander angeordneten Abschnitten bilden, und wobei die Tafeln anschließend durch Einleiten eines Druckmittels zur Bildung von Wasserkanälen durch Aufwölben der Tafeln zwischen den Verschweißungen verformt werden, so dass das Wasser beim Betreiben der Wärmetauscher in s-förmigen Bahnen fließt.The invention relates to a method for producing Heat exchangers for fuel-heated devices, esp. Hot water boiler, two levels consisting of metal Sheets laid one on top of the other, along the edges are welded and the panels by several of the Edges of spaced welds, all parallel run to each other, be connected, the Weldings are interrupted and the interruptions Form sections and then the so together welded sheets are bent in an S-shape, so that the Sections across the welds, arched transitions form between flat, stacked sections, and the panels are then opened by introducing a Pressure medium for the formation of water channels by bulging the Sheets are deformed between the welds so that the water when operating the heat exchanger in S-shaped Pathways flows.
Die Herstellung derartiger Wärmetauscher hat sich zwar bewährt, jedoch können sich beim Verformen der schon stellenweise miteinander verschweißten Tafeln im Bereich der zu formenden bogenförmigen Überläufe Schwierigkeiten ergeben, um einen ausreichenden gegenseitigen Abstand der Tafeln zu erreichen, der den gewünschten Wasserdurchlauf sicherstellen muss. Ein gehöriger gegenseitiger Abstand der Tafeln setzt nämlich erhebliche Drücke voraus, wenn die örtliche Verformung der Tafeln vollzogen werden soll, um so die Wasserdurchlaufkanäle innerhalb des Wärmetauschers zu erstellen. Dies trifft insb. für die Überläufe zu.The production of such heat exchangers has proven itself, however, when deforming the already in places welded panels in the area of the to be formed arcuate overflows give rise to difficulties to achieve sufficient mutual distance between the panels, ensure the desired water flow got to. A proper mutual distance between the boards sets namely significant pressures ahead when the local deformation of the panels is to be completed, so as to allow the water flow channels to create within the heat exchanger. This especially applies to the overflows.
Der Erfindung liegt die Aufgabe zugrunde, die Herstellung der eingangs erwähnten Wärmetauscher so zu vereinfachen, dass mit einem vertretbaren technischen Aufwand auch im Bereich der Übergänge ein großer gegenseitiger Abstand der Bögen sichergestellt werden kann, wobei die Erfindung sogar die Möglichkeit eröffnet, Bogenabstände zu erreichen, die größer sind als im Bereich der übrigen Abschnitte der Tafeln bzw. im Bereich der geraden Abschnitte.The invention has for its object the manufacture of Simplify the heat exchanger mentioned above so that with a reasonable technical effort also in the area of Transitions a large mutual distance between the arches can be ensured, the invention even the Opportunity to achieve arc distances that are larger are as in the area of the remaining sections of the boards or in Area of straight sections.
Zur Lösung dieser Aufgabe werden erfindungsgemäß die Tafeln vor dem Verschweißen mit Ausbuchtungen zur Bildung der äußeren bogenförmigen Übergänge versehen. Dem gemäß werden die Tafeln nicht mehr als ebene Gebilde, sondern als Tafeln benutzt, die in den Bereichen der späteren Überläufe bereits mit Ausbuchtungen versehen sind. Vorzugsweise werden aber diejenigen Abschnitte der Tafeln, die später die inneren Bögen bilden sollen, nicht vorgeformt. Es versteht sich, dass das Mass der Ausbuchtung die spätere Bogengestalt der Übergänge bestimmt. Werden also grössere Ausbuchtungen vorgesehen, so ergeben sich entsprechend grosse Radien und demgemäss grosse Durchgangsquerschnitte im Bereich der Übergänge des Wärmetauschers.To achieve this object, the panels are provided according to the invention welding with bulges to form the outer arcuate transitions. The tables are made accordingly no longer used as flat structures, but as panels that already in the areas of the later overflows Bulges are provided. But preferably those sections of the panels that later become the inner ones Form arches, not preformed. It goes without saying that the extent of the bulge the later arch shape of transitions. So become bigger Bulges are provided accordingly large radii and accordingly large passage cross-sections in the area of the transitions of the heat exchanger.
Weitere Einzelheiten der Erfindung werden anhand der
Zeichnung erläutert, in der ein Ausführungsbeispiel der
Erfindung dargestellt ist. Es zeigen :
Der Grundkörper für die Herstellung des Wärmetauschers
besteht aus zwei im wesentlichen gleich grossen Tafeln 1
aus Metallblech. Die Tafeln 1 sind jedoch nicht völlig
eben, sondern vorbehandelt. Sie weisen einander parallele
etwa u-förmige Ausbuchtungen 22 auf, die sich quer zu
den Tafeln 1 erstrecken und sich bei der oberen Tafel 1
nach oben und bei der unteren Tafel 1 nach unten
erstrecken, und zwar jeweils um eine halbe Teilung
gegeneinander versetzt.The basic body for the manufacture of the heat exchanger
consists of two
Die Tafeln 1 werden - mit den nachstehend noch genannten
Ausnahmen - an den äusseren Rändern 2 miteinander
verschweisst. So ist auch in den Ecken bei 3 keine
Schweissung vorgesehen, weil hier beim fertigen
Wärmetauscher bei 4 der Einlass und bei 5 der Auslass für
das zu behandelnde Wasser angeordnet wird. Im Abstand von
den Rändern der Tafeln 1 sind noch einander parallele und
quer zu den Ausbuchtungen 22 verlaufende Verschweissungen
6 vorgesehen, die beim fertigen Wärmetauscher getrennte
Kanäle 7 begrenzen sollen, die innen nicht durch
Schweissungen unterbrochene Sektionen 8 münden, die beim
fertigen Wärmetauscher bogenförmige übergänge 9 entstehen
lassen, während die Kanäle 7 ebene Abschnitte 10
entstehen lassen. Wie aus der Zeichnung erkennbar ist,
befinden sich die Ausbuchtungen 22 im Bereich der
Übergänge 9, da sie hier eine besondere Bedeutung
erhalten.The
Der so gefertigte Grundkörper wird nunmehr im Sinne der
Fig. 4 s-förmig gebogen, wobei die Sektionen 8 etwa
halbkreisförmig gestaltet werden. Diese Verformung ergibt
sich aus Fig. 3. Die Ausbuchtungen 22 bilden dabei den
äussseren Bogen 90' an den Übergängen 9. Werden die
Ausbuchtungen 22 relativ tief ausgeführt, so ergibt sich
gemäss Fig. 3 ein gröseren Abstand zwischen dem inneren
Bogen 90'' - gebildet aus den ebenen Abschnitten des
jeweils innen liegenden Tafelabschnittes. Es ist jedoch
möglich, durch eine entsprechende Tiefe der Ausbuchtungen
22 Bögen 90 zu erzielen, die praktisch parallel
zueinander verlaufen, wie dies in Fig. 4 dargestellt ist.The basic body thus manufactured is now in the sense of
Fig. 4 s-shaped, the
Die besondere Bedeutung der Ausbuchtungen 22 besteht
darin, dass durch einfaches Verbiegen ein gegenseitiger
Abstand der Bögen 90 möglich ist. Der Wasserdurchlauf ist
also sichergestellt, und zwar in besonderer Weise bei
Bögen 90 gemäss Fig. 2 und 3.The particular importance of the
Die Verformung des Grundkörpers insb. zur Bildung der
Wasserkanäle in den Abschnitten 10 erfolgt mittels Gesenk
gemäss Fig. 4, das aus fünf Teilen gebildet ist. Die
Teile 11 - 13 liegen auf der einen Seite, die Teile 14,
15 auf der anderen Seite. Die Teile sind im Sinne der
Pfeile 16, 17 gegenläufig bewegbar. Letzthin wird die
Fertiggestalt des Wärmetauschers durch das Gesenk
bestimmt. Um dabei die Kanäle 7 zu bilden, wird zwischen
die beiden Tafeln 1 ein Druckmittel z.B. Drucköl
eingeführt. Es wird eine bleibende Verformung erreicht,
nachdem sich Auswölbungen 18 eingestellt haben. Diese
Verformung ist in Fig. 5 dargestellt, wobei jedoch darauf
verwiesen wird, dass die einander gegenüberliegenden
Teile des Gesenks auch mit Vorsprüngen versehen sein
können, um die Gestalt der Auswölbungen 18 zu
beeinflussen und die Schweissverbindungen zu entlasten.The deformation of the base body, in particular to form the
Water channels in
Die Eckabschnitte 3 sind besonders geformt, um den Ein-
bzw. Auslass des Wärmetauschers zu bilden.The
Es sei darauf hingewiesen, dass anstelle der
dargestellten vier Abschnitte 10 weitere oder aber auch
eine geringere Anzahl Abschnitte 10 gewählt werden kann.It should be noted that instead of
illustrated four
Das zu erwärmende Wasser wird in Richtung der Kanäle 7
geführt und in den Übergängen 9 umgelenkt und von dort in
die Kanäle 7 des folgenden Abschnitts 10 geführt. Die
Rauchgase bzw. Verbrennungsgase hingegen werden im
rechten Winkel zu den Kanälen 7 jeweils zwischen zwei
Abschnitten 10 geführt. Damit unter diesen Bedingungen
die Rauchgase ebenfalls s-förmig geführt werden können,
sind die Abschnitte 10 gegeneinander versetzt. Die
Versetzungen und Ausnehmungen sind in Fig. 1 bei 20
dargestellt. Infolge dieser Ausnehmungen können die dem
Wärmetauscher benachbarten Wandungen des Kesselgehäuses
eben gehalten werden. Eine solche Ausbildung des
Wärmetauschers ist im Deutschen Patent 37 01 362
beschrieben.The water to be heated is directed towards
Gemäss Fig. 3 sind die Enden der Ausbuchtungen 22
geringfügig abgetragen. Dadurch ergibt sich eine
verbesserte Möglichkeit, den durch die unterschiedlich
grossen Bögen 90 bedingten Spalt zu verschliessen. Es ist
zweckmässig, ein Formteil zu nutzen, das den Spalt
überdeckt und durch Schweissen mit den beiden Tafeln 1 zu
verbinden ist.3, the ends of the
Claims (5)
- Method of producing heat exchangers for fuel-heated apparatuses, more especially hot-water heating boilers, wherein two flat plates (I), which are formed from metal, are placed one on top of the other and are welded together at the edges (2), and wherein the plates (1) are interconnected by means of a plurality of weldings (6), which are spaced from the edges (2) and all extend parallel to one another, wherein the weldings (6) are interrupted, and the interruptions form sections (8), and subsequently the plates (1), which are thus welded together, are bent in an S-shaped manner so that the sections (8) form, transversely relative to the weldings (6), arcuate transitional regions (9) between flat portions (10), which are disposed one on top of the other, and wherein, by introducing a pressure medium between the weldings (6), the plates (1) are subsequently deformed to form water channels by arching the plates (1), so that the water flows in S-shaped paths during the operation of the heat exchangers, characterised in that, prior to the welding process, the plates (1) are provided with bulges (22) to form the outer arcuate transitional regions (90').
- Method according to claim 1, characterised in that the plates (1) are deformed to such an extent that the bulges (22) have a substantially U-shaped configuration.
- Method according to claim 1, characterised in that the bulges (22) of one plate (1) have associated therewith a flat portion of the other plate (1).
- Method according to claim 1, characterised in that the two plates (1) are so deformed, during the bending process, that the two curved portions (90), situated at the transitional regions (9), have different radii.
- Method according to claim 1, characterised in that the bulges (22) are slightly reduced in size at their ends, and the gap between the two curved portions (90), forming the transitional region (9), is bridged by a cap-like closure.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19544204A DE19544204A1 (en) | 1995-11-28 | 1995-11-28 | Process for the production of heat exchangers for fuel-heated devices for heating water |
DE19544204 | 1995-11-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0777096A2 EP0777096A2 (en) | 1997-06-04 |
EP0777096A3 EP0777096A3 (en) | 1998-11-25 |
EP0777096B1 true EP0777096B1 (en) | 2003-02-19 |
Family
ID=7778548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96118071A Expired - Lifetime EP0777096B1 (en) | 1995-11-28 | 1996-11-12 | Process for manufacturing a heat exchanger for fuel-heated apparatus for heating water |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0777096B1 (en) |
AT (1) | ATE232963T1 (en) |
DE (2) | DE19544204A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE865187C (en) * | 1947-06-26 | 1953-01-29 | Karl Ing Janik | Radiator for central heating systems and like |
GB770296A (en) * | 1953-03-20 | 1957-03-20 | Gen Motors Corp | Improved heat exchanger and method of making same |
US3732714A (en) * | 1971-03-01 | 1973-05-15 | Olin Corp | Method and apparatus for deforming a flat on parts of metal strip-type tubing while leaving other parts undeformed |
DE3701362A1 (en) * | 1987-01-19 | 1988-07-28 | Richard Vetter | Heat exchanger for apparatuses for heating water and method for the production of these heat exchangers |
-
1995
- 1995-11-28 DE DE19544204A patent/DE19544204A1/en not_active Withdrawn
-
1996
- 1996-11-12 AT AT96118071T patent/ATE232963T1/en not_active IP Right Cessation
- 1996-11-12 EP EP96118071A patent/EP0777096B1/en not_active Expired - Lifetime
- 1996-11-12 DE DE59610151T patent/DE59610151D1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19544204A1 (en) | 1997-06-05 |
EP0777096A2 (en) | 1997-06-04 |
EP0777096A3 (en) | 1998-11-25 |
DE59610151D1 (en) | 2003-03-27 |
ATE232963T1 (en) | 2003-03-15 |
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