EP0680586A1 - Heizkessel - Google Patents
HeizkesselInfo
- Publication number
- EP0680586A1 EP0680586A1 EP94904968A EP94904968A EP0680586A1 EP 0680586 A1 EP0680586 A1 EP 0680586A1 EP 94904968 A EP94904968 A EP 94904968A EP 94904968 A EP94904968 A EP 94904968A EP 0680586 A1 EP0680586 A1 EP 0680586A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat transfer
- flow
- light metal
- boiler
- boiler according
- 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- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
- F24H1/30—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle being built up from sections
- F24H1/32—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle being built up from sections with vertical sections arranged side by side
Definitions
- the invention relates to a boiler for the combustion of liquid or gaseous fuels, consisting of at least one intermediate member arranged between two flowable end members and also flowable through the heat transfer medium, all members being made of cast metal and forming one with the supply and return connections Provided block forming a combustion chamber, heating gas flues and an exhaust gas chamber with a flue pipe having boiler body are sealed together.
- Such boilers which are also known as sectional boilers, are known.
- the limbs of such boilers generally consist of gray cast iron hollow bodies and require the use of appropriate cores for their shaping, which, apart from disposal problems for the core molding sand, is associated with considerable manufacturing outlay.
- the links must be nippled against each other in order to be able to assemble them into a boiler housing block.
- the gray cast iron links on the hot gas side must also be provided with suitable resistant coatings, which is not unproblematic, because this can only be put into practice if a self-contained coating can be produced with the gray cast iron, which creates a permanently solid connection.
- light metal or light metal alloys such as aluminum or aluminum alloys also have the advantage that they are resistant to condensate from desulfurized natural gas, but not to the heating water as a heat transfer medium, which generally becomes basic, which sooner or later always leads to erosion on the water side of such light metal boilers.
- high demands are to be made of the light metal casting, since the finished casting or the light metal members must be free of pores, ie high demands must be made of the light metal, and light metal or Aluminum scrap can be used.
- the invention is therefore based on a boiler of the generic type, the task of creating a boiler that is corrosion-resistant on both the heating gas and water side and for which it does not matter whether and to what extent the cast light metal body is porous or not, combined with the proviso that the casting can be cast without a core, and that the boiler, although formed from links, does not require the links to be nipped between them.
- each plate-shaped member through which the heat transfer medium can flow is formed from a pipe or pipe system cast into the light metal body, the front and return connections of each The light metal body protrude and are connected to flow and return collectors arranged outside the block, and that the at least one intermediate member provided with an opening forming the combustion chamber is provided on both sides and the two end members are provided with peripheral edge connecting webs towards the intermediate member connection side and their ends in Form of gas sealing surfaces are formed.
- the pipe system used with the cast-in pipe which extends in a serpentine shape through the light metal body, or Q, which is used in more detail below, is a steel pipe that is commonly used in boiler construction and ensures good watertightness against corrosion on the The water side is sufficiently resistant and, in this respect, is a prerequisite for the use of non-qualitative light metal which is resistant to condensate on the heating gas side.
- the flow and return connections are also not formed in the form of channels in the light metal bodies forming the links, but the ends of the tube or the tube system simply protrude laterally from the links and are on outer flow and return collectors connected.
- the intermediate elements have corresponding recesses or openings, which then form the combustion chamber when several individual elements are joined together.
- the end members on the one hand have corresponding openings for the burner intervention and on the other hand the heating gas discharge connection. These recesses and openings also do not require the use of cores when casting.
- the pipe or the pipe system is also provided with a necessary number of spacers made of light metal, with which the pipe or pipe system is inserted into the casting mold.
- Aluminum or light metal alloys are known to have a larger coefficient of expansion than iron.
- the tubes are advantageously provided with grooves at certain intervals, which are not very deep (for example, only corresponding to the material thickness of the tube) but relatively wide should be.
- the liquid aluminum also fills these beads, so that the light metal body, when it expands, cannot slide over the pipe system due to the engagement in the beads.
- the change in length in the beads need only be minimal.
- peripheral edge connecting webs As far as the peripheral edge connecting webs are concerned, these naturally only extend where an external seal or seal is required.
- the height of these peripheral edge connecting webs is dimensioned such that the transmission area enlargements end below the plane in which the upper edge of the webs extends.
- the boiler according to the invention is provided in particular as a boiler that can be operated with an atmospheric burner, but there is nothing to prevent it from being operated with a forced draft burner.
- Figure 1 is an intermediate member of the boiler in side view.
- Figure 2 shows a section through the intermediate member along line II-II in Fig. 1.
- FIG. 3 shows an intermediate member of the boiler in a side view with a slightly different embodiment of the pipe system
- Fig. 5 is a side view of the boiler, assembled from links according to Figures 1 and 3.
- Figure 6 is an intermediate member of the boiler in side view with a meandering tube.
- Fig.l ⁇ A, B an intermediate belonging to the embodiment of FIG. 7.
- the boiler consists of at least one intermediate member 3 arranged between two end members 1, 2 through which flow can pass, and also through which the heat transfer medium can flow, all members being made of cast metal and forming a combustion chamber 10 and a gas outlet provided with the supply and return connections 4, 5 9 comprising boiler body-forming block B are joined together in a sealed manner.
- the links 1 to 3 are formed from core-free shaped light metal and in each link 1 to 3 the flowable cavity consists of a tube 6 or cast into the light metal body Pipe system 6 'is formed, the flow and return connections 4, 5 from each light metal body protrude and are connected to the flow and return collectors 4 ', 5'.
- the at least one intermediate link 3 is on both sides and the two end links 1, 2 are provided toward the intermediate link connection side S on their large flank surfaces F with heat transfer surface enlargements 7 at least in the area of the gas extraction section AS and with peripheral edge connecting webs 8.
- FIG. 1 shows an intermediate member 3 in a side view and with a pipe system 6 ', the individual pipes of the pipe system being shown only in dashed lines but partially cross-hatched for clarification.
- the intermediate link according to FIGS. 3, 4 only differs from that according to FIG. 1 in that the pipe system 6 ', which is also partially cross-hatched, has a different arrangement structure of the individual pipes.
- a meandering tube 6 is cast in the intermediate member 3.
- FIGS. 1, 3 and 6 All of the embodiments according to FIGS. 1, 3 and 6 are intended for boilers with an atmospheric burner (not shown), the intermediate members 3 shown having openings 10 'corresponding to the desired cross section of the combustion chamber 10. Since the heating gases flow upwards through the gas extraction section AS, the peripheral edge connecting webs 8 (see FIG. 3) open upwards, an exhaust gas collection chamber 12 with exhaust gas extractor 9 being arranged over the entire block B (see FIG. 5).
- the individual tubes forming the cross-hatched tube system 6 'in FIGS. 1, 3 are expedient and, as shown in section in FIG. 3A, B, are oval-shaped in cross-section, their broad sides BS against the flank surfaces F of the links 1 to 3 in Light metal body are arranged oriented in order to "get in the way" of the largest possible heat transfer surface in the direction of heat application.
- the pipes 6 "for the pipe system are provided with beads 11 which are arranged at certain intervals from one another, but which are only recessed towards the water side, for example, by a wall thickness, which is sufficient to sufficiently differentiate the different material components from each other with thermal expansion Anchoring, which results from the fact that the liquid light metal naturally fills the beads 11 from the outside as well during casting.
- This anchoring expands the light metal body and the integrated pipe system together largely evenly when exposed to heat. Such different thermal expansions move only in the hundredths of a millimeter range, and these anchors have the purpose of essentially keeping the weld seams of the pipe system free of tensile loads which could otherwise lead to weld cracks on the pipe system.
- the heat transfer surface enlargements 7, which are represented continuously and, for example, as knobs 7 ', are automatically created when the casting mold (mold) is designed accordingly, and likewise the condensate collection and discharge webs 11, which are used to ensure that any condensate that arises from the side is discharged. so that the condensate cannot drip onto the burner (not shown).
- the knobs 7 'in this area in the inflow area A above the combustion chamber 10 are dimensioned to be lower than those in the subsequent area F ⁇ of the gas exhaust section AS.
- the links 1 to 3 are arranged upside down, so that the combustion chamber 10 which is then intended for a forced-air burner (not shown) is located at the top of the block, that is to say the gas is drawn down here into an exhaust gas collection chamber arranged there 12.
- the circulating webs 8 also extend in the upper horizontal transverse region and are kept correspondingly thick (see FIGS. 10A, B), in order to optionally pour in several pipe strands next to one another and to dissipate the amount of heat transferred there to a sufficient extent can.
- FIG. 8 shows the combustion chamber 10 for a forced-air burner is arranged essentially horizontally, which is followed by the extraction section AS, oriented vertically downwards at the end of the combustion chamber 10.
- the combustion chamber 10 extends across the entire upper part, and the extraction section AS is located in the downward leg 16 of the generally rectangular block B.
- the shape of the combustion chamber or the combustion chamber 10 can, as shown in FIG. 8 indicated by dashed lines, at the end distant from the burner, with a corresponding shaping of the links 1 to 3, can also be arcuate.
- FIGS. 8A to D shows the two end links 1 ', 2' and FIG.
- FIG. 8B the intermediate links 3 'of the pipe systems cast with the respective ones, FIG. 8C being a section along line I-I in FIG. 8B.
- the intermediate link according to FIG. 8D differs from that according to FIG. 8B in that a lockable bypass channel 13 is present here. Otherwise, the same reference numerals for corresponding elements are used in these embodiments as before, so that these links need no additional explanation.
- At least one of the links can be easily provided with a closable bypass channel 13, which is formed by a pipe made of condensate-resistant material which is also cast in.
- the opened bypass duct 13 then ensures speaking raising the flue gas temperature (see Fig. 9), if the boiler is not to be operated as a condensing boiler
- These vertical channels parallel to the heating gas flues are required in order to allow uncooled heating gases to flow through these channels into the exhaust gas collection chamber in order to raise the exhaust gas temperature.
- the entire block B (see FIG. 6) is provided at the bottom with a condensate collecting trough 14.
- the burner-side end member 1 has one with respect to the opening 10 'or the end members 1, 2 for the assembly of Schukessel ⁇ blocks with intermediate members
- Intermediate members 3 have a smaller opening 10 ", as indicated by dash-dotted lines in FIG. 3, and the other end member 2 has no such opening, since this end member 2 forms the rear wall 2" of the combustion chamber or the combustion chamber.
- this rear wall 2 is subjected to a great deal of heat, the water-carrying pipe system is also arranged there in the region of the rear wall 2 ', in fact the same or similar to the end members 1', 2 'shown in FIG on the whole block B according to FIG. 8 there form the side flank of block B.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Road Paving Structures (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934302479 DE4302479A1 (de) | 1993-01-29 | 1993-01-29 | Heizkessel für die Verbrennung flüssiger oder gasförmiger Brennstoffe |
DE4302479 | 1993-01-29 | ||
PCT/DE1994/000065 WO1994017338A1 (de) | 1993-01-29 | 1994-01-25 | Heizkessel |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0680586A1 true EP0680586A1 (de) | 1995-11-08 |
Family
ID=6479199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94904968A Withdrawn EP0680586A1 (de) | 1993-01-29 | 1994-01-25 | Heizkessel |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0680586A1 (de) |
CN (1) | CN1094495A (de) |
AU (1) | AU5878994A (de) |
DE (1) | DE4302479A1 (de) |
RU (1) | RU2101622C1 (de) |
WO (1) | WO1994017338A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19502765C2 (de) * | 1995-01-30 | 1996-11-14 | Hans Dr Dr Viesmann | Heizkessel in Gliederbauweise |
AT402668B (de) * | 1995-03-13 | 1997-07-25 | Vaillant Gmbh | Gussgliederkessel gussgliederkessel |
DE102004025621B4 (de) * | 2004-05-25 | 2013-12-19 | Robert Bosch Gmbh | Wärmetauscher |
DE102008012918B4 (de) * | 2008-03-06 | 2010-06-10 | Viessmann Werke Gmbh & Co Kg | Gussheizkessel |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH177035A (fr) * | 1933-03-23 | 1935-05-15 | Crugnola Luigi | Appareil d'échange thermique et procédé de fabrication de cet appareil. |
CH625611A5 (de) * | 1978-03-15 | 1981-09-30 | Sulzer Ag | |
JPS5756147A (en) * | 1980-09-22 | 1982-04-03 | Nippon Light Metal Co Ltd | Method for internal chill casting |
DE3622266A1 (de) * | 1985-07-30 | 1987-02-12 | Vaillant Joh Gmbh & Co | Verfahren zur herstellung eines waermetauschers aus aluminium und anwendung des waermetauschers als gusskesselglied |
-
1993
- 1993-01-29 DE DE19934302479 patent/DE4302479A1/de not_active Ceased
-
1994
- 1994-01-25 RU RU95116359A patent/RU2101622C1/ru active
- 1994-01-25 AU AU58789/94A patent/AU5878994A/en not_active Abandoned
- 1994-01-25 EP EP94904968A patent/EP0680586A1/de not_active Withdrawn
- 1994-01-25 WO PCT/DE1994/000065 patent/WO1994017338A1/de not_active Application Discontinuation
- 1994-01-28 CN CN 94101112 patent/CN1094495A/zh active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9417338A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2101622C1 (ru) | 1998-01-10 |
CN1094495A (zh) | 1994-11-02 |
DE4302479A1 (de) | 1994-08-04 |
AU5878994A (en) | 1994-08-15 |
WO1994017338A1 (de) | 1994-08-04 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19950823 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE |
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17Q | First examination report despatched |
Effective date: 19951201 |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19971223 |