CA1238539A - Boiler construction - Google Patents
Boiler constructionInfo
- Publication number
- CA1238539A CA1238539A CA000491104A CA491104A CA1238539A CA 1238539 A CA1238539 A CA 1238539A CA 000491104 A CA000491104 A CA 000491104A CA 491104 A CA491104 A CA 491104A CA 1238539 A CA1238539 A CA 1238539A
- Authority
- CA
- Canada
- Prior art keywords
- header
- access opening
- header means
- straight end
- tubing
- 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
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
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
- F24H1/41—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes in serpentine form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/22—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight
- F22B21/24—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight bent in serpentine or sinuous form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/104—Connection of tubes one with the other or with collectors, drums or distributors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A novel hot water heater is disclosed having A
furnace enclosure with a major access opening in one generally planar wall thereof. Parallel, vertically spaced headers are provided in the enclosure, one extending across the top of the opening and the other extending across the bottom of the opening. A series of parallel tubes extend from one header to the other header in the enclosure, Each tube is coupled to the header on the side thereof closest the access opening and arranged so that on uncoupling each tube may be withdrawn through the opening. The headers are located sufficiently close to the opening to facilitate manual coupling and uncoupling of tubes through the access opening for replacement and repair.
A novel hot water heater is disclosed having A
furnace enclosure with a major access opening in one generally planar wall thereof. Parallel, vertically spaced headers are provided in the enclosure, one extending across the top of the opening and the other extending across the bottom of the opening. A series of parallel tubes extend from one header to the other header in the enclosure, Each tube is coupled to the header on the side thereof closest the access opening and arranged so that on uncoupling each tube may be withdrawn through the opening. The headers are located sufficiently close to the opening to facilitate manual coupling and uncoupling of tubes through the access opening for replacement and repair.
Description
~ ~3~3~
~;UMMARY OF THE IN~IENTION
This invention relates to water heating apparatus and more particularly to a water heater with interchangeable heating tubes which can readily be~manually replaced via a single access opening into a furnace enclosure.
BACKGROUND OF TE~E INVENTION
A myriad of water heaters and water boilers are known to supply heated water and steam for domestic, com-mercial and industrial purposes. Many known water heaters and boilers include relatively small tubes to carry water to be heated thxough a furnace enclosureO A disadvantage of many known water headers and boilers is that such tubes cannot be replaced, or can only be replaced with difficulty, for example, by substantial disassembly of the urnace enclosure~ Another disadvantage is that the number of such tubes is selected at manufacture, therehy determining the volumetric capacity of the water heater and flow rates at which water may efficiently be heated.
Once manuEactured the number of tubes cannot easily be changed to meet changes in volumetric needs yet maintain efficient heating.
SUMMARY OF TElE INVENTION
~ ccordingly, it is an object of the present invention to at least partially overcome these dis-advantages of known hot water heaters and boilers by , ; ~ . ,' . , ~23853~
1 providing a water heater with readily accessible, removableand replaceable heating tubes, To this end, in one oE its aspects the present invention provides a water heat.ing apparatus comprising a furnace enclosure with an access opening in one generally planar wall thereof, a fluid conduit system disposed within the enclosure and comprising first heater means;
second heater means generally parallel to the first header means; the first header means and second header means extending across the access opening at opposite ends thereof spaced one from another; a plurality of tubing means providing fluid communication therethrough from the first header means to the second header means; and each tubing means lying generally in a plane normal to the first header means and the second header means, each tubing means comprising (a) a first end releasably sealably coupled to the first header means by 1st coupling means; (b) a second end.releasably sealably coupled to the second header means hy 2nd coupling means; (c) a 1st straight end saction at the 1st end extending generally linearly therefrom toward the access opening, (d) a 2nd straight end section at the second end extending generally linearly therefrom toward the access opening generally parallel to the 1st straight end section; (e) a middle section ~oining each of the 1st and 2nd straight end sections .. . . .. . .
38~3~
1 and extending there~rom between the first and second header means to have portions thereof disposed between the first and second header means farther ~rom the access opening than the ~irst and second header means, the 1st and 2nd straight end sections and m.iddle section providing each tubing means with a configuration, having regard to the location o the first and second header means and the access opening that each tubing means by movemen-t generally parallel to the 1st and 2nd straight end sections can be inserted and wit~ldrawn through the access opening for coupling and uncoupling with the first and second header means, the first and second header means-located sufficiently close to the access opening to permit manual access through the access opening.
to the 1st and 2nd coupl.ing means for manual coupling and uncoupling of the tubing means to the first and second header means~
.BRIEF DESCRIPTION OF THE DRAWINGS
.. .. . .... .. ....... _ _ . .
Further ob~ects and advantages will appear from the following description taken together with the accompanying drawings, in which:
Figure 1 is a front view of a water heating apparatus in accordan~e with a fi.rst embodiment of the pre-sent invention with its access door shown substantially cut away, .
:~3~1~3~
1 Figure 2 is a schematic cross-sectional side view of the water heater o~ Figure 1 generally as seen along section line II-II' in Figure 1 but with the access door shown and the flue pipe in cross-section, Figure 3 is an exploded view of the ~uncture between a header and a tube as seen in Figure 2, Figure 4 shows an end view of a staggered tube, Figure 5 is a cross-sectional side view similar -to that of Figure 2 of a water heating apparatus in accord-ance with a second embodiment, and Figure 6~,is a schematic pictorial representation of the fluid conducting.assembly of Figures 1 and 2, modified for use in production of steam.
DETAILED DESCRIPTION OF THE DR~WINGS
Reference is made first to Figures 1 and 2 which show front and side views of a water heater 10 in accordance with a first aspect of the present invention. The water heater includes a rectilinear box-like furnace enclosure comprising insulated front wall 12, rear wall 14, side wa~ls 16 and 18, top wall 20 and bo-ttom wall 22~ Generally planar front wall 12 has a ma~or access opening 2~ provided inthe uppermost portion thereof which is closed by removable door 26 seen in Figure 2 secured to the res-t of the enclosure by bolts 28. Figure 1 shows the water heater with the outermost perimeter of door 26 shown by dotted lines 29, ,, ' . ':
,ii , . . ~ . . .. .
~3~i3~
1 A fluid conduit system ~enerally designated 30 is disposed inside the upper portion oE the furnace enclosure~ The s~stem includes a Eirst header 32 an~ a second header 34 with a plurality of identical tubes 36 extending therebetween, Water may,~:for example, enter the first header 32 as shown by arrow 40 and pass there-through into each tube 36, then through tubes 36 to second header 34 exiting header 34 as shown by arrow 42.
Headers 32 and 34 are substantially parallel and each extends across access opening 24 spaced vertically from one another at opposite e~ds of opening 24.
Each tube 36 has a first end 44 coupled to first header 32 to place the interior of the tube in communication with the first header and a second end 46 coupled to the second header 34 to place the interior of .
the tube in communication with second header 34. Tube 36 has effectively a first straight end section 48 at first end 44 which extends from the first end 44 linearly toward access opening 24. Tube 36 has a second straight end 20 section S0 at second end 46 which extends linearly toward access opening generally parallel to first straight section 48. Between first strai.ght end section 48 and second straight end section 50 .is a middle section which extends from the first and second straic~ht sections to between the first and second headers and is located between the two headers with portions extending .into the furnace enclosure ,. . .
' . ' ' ' ~3~3~i3~
1 farther rom access opening 2~ than headexs 32 and 34.
As best seen in Figure 2 each tube 36 appears as a series of interconnected S-shaped coils between the two headers. The S-shaped coils.have elongate straight sey-ments 54 generally parallel to first and second straightsections 48 and 50 and.interspaced with front semi-circular segments 56 and rear semi-circular segments 58. The middle section may be seen to extend from each of the ~irst or second straight end sections 48 and 50 as semi-circular segments 56 which smoothly curve.away from access opening 24 toward the other o~ the respective first and second .
end sections ~8 and 50 before extending linearly away ~rom access opening 24 as a straight segment 54.
Figure 3, shows preferred coupling means removably, releasably coupling the ends.of each. tube to the headers, As seen in Figure 3, the wall o.f the pipe comprising header 32 is provided with tapering openings 60 therethrough which are adapted to receive in sealed force fit relation .
complimentary plugs 62 welded onto the end of cylindrical tube 36. Plug 62 tapers so as to reduce its diameter towards header 32. Plug 62 is insertable and removable from aperture fiO by movement of tube 36 in a direction parallel to the straight end section 48.
When door..26 is removed, each tube 36 can be uncoupled at both its ends and removed from the ~urnace enclosure by moving the entirety of tube 36 as a unit . ~ , , .
l in a dlrection parallel to the strai~ht end sections out o~ access opening 2~. .Similarly, a new tube 36 can be installed by inserting it through~access-openi.ng 24, maintaining it in a correct ori.entation whereby both ends may enga~e their respective openings in the header.
As seen in Figure 2, both first header 32 and second header 34 are located sufficiently close to access opening 24 that the couplings between the headers and tubes 36 are readily accessible by a workman outside the furnace enclosure through access opening.24. By mere removal of door 26, a workman can gain access tc the means coupling a tube to the header,.readily uncouple any tube and remove that tube. A replacement tube.may then readily be inserted.
It is to be appreciated.that the.size and configuration of each tube 36, as determin~d by the first and second end sections and the middle section, is to be chosen having reyard to the location of the headers and access opening so that each tube 36 can by movement generally parallel its straight end sections be inserted and withdrawn through the access open1ng for coupling and uncoupling with the headers.
The water heater of.Figures l and 2 includes a burner unit, typically a gas or.oil burner 63 mounted on front wall.12 to extend therethrough and direct primary combustion flame 6~ into an open space 66 within the.furnace enclosure below the fluid conduit system. The lower ~238~;~9 1 portion of the furnace comprising open space 66 is generally referred to as the fire box. Hot gases from combust.ion heat the furnace enclosure and pass upwardly to exit Elue vent 68. Insodoing 9 heat exchange between water in the fluid conduct system and the hot gases in th.e furnace enclosure heats the water.
Reference is now made to Figure 4 which shows an alternate staggered tube 361 to replace tube 36 in Figure 1. Staggered tube 36' is shown in end view which is the view in which tube 36 is seen in Figure 1. Tube 36' appears in side view the same as tube 36 as seen in Figure 2. However,as seen in Figure 4 in end view~the set of each alternate straight segments54a have their axes on vertical plane 70 spaced.to one side from a plane 72 on which the axes.of the other set of alternate straight segments 54b lie. By such staggering of adjacent straight segments, increased heat transfer between heated gases in the enclosure and.water in tubes 36 can be achieved.
In Figures 1 and 2, fire box 66 is disposed.below an upper volume in the enclosure containing the fluid conduit system. Figure 5 shows a second embodiment in which the burner 63 may be disposed at a height above second header 34. In Figure 5, all tubes 36 are coiled so as to provide between straight segments 54c and 54d a substantial vertical separation, to define therein a substantial volume to receive the combustion flame and effectively serve as the fire box. In this case burner 63 .r ~
',, ' ' ' :
, .
~3~
1 is not mounted the front wall but rather may be mounted to one of the side walls 16 and 18 or rear wall 14 to direct flame into the fire box~ Burner 63 is shown mounted in side wall 16, The embodiment o~ Figure 5 has the dis-advantage that it requires a comparatively larger door 26 than that of Fisure 1.
Reference is now made to Figure 6 which shows the fluid conduit system of Figures 1 and 2 modified to be able to produce steam as well as hot water, In Figure 6, ~irst header 32 is an outlet header whose outlet 80 may be closed by valve 82 if only steam is desired to be produced. Header 34 has water inlet 84~ Tubes 36 are to be provided as in Figures 1 and 2 with the path o~ a single tube shown schematically as line 86.
Water return pipe 88 permits water to recycle from header 32 to header 34. Steam from header 32 may rise via T-pipe 90 into two steam headers 92 and 94 and from which steam may exit via exit pipes 96 and 98~ Con-densed water in steam headers 92 and 94 returns to water return pipe 88 via condensate pipes 99.
The embodiment of Figure 6 may be provided in a suitably sized furnace enclosure somewhat taller than that required for the embodiment of Figure 1~ As in Figure 1, the headers,are to be located close to the access opening. Each tube 36 may be withdrawn through the access opening. The additional piping and steam headers of the embodiment of Figure 6 have been located _g_ .. . .
', ~l~3~3~;i3~
1 so that they do not in~erfere with~the ability of each tube 36 to be withdrawn through the access opening as in the case.of embodiment of Figure 1.
In the Figures, piping from water sources and exit lines for hot water or steam have only partially been shown. ~iscellaneous pipiny for:control and safety release valves are not shown.-.It is to be appreciated however that such piping can be readily be arranged to not impede access through door 24 to couple and uncouple-tubes 36 from the headers. ~referably:as shown in the case of Figure 1, all piping connections other than couplings between tubing 36 and the headers are located externally of the furnace enclosure ~or ready access thereto.
. ~. The water heater of Figures 1 and 2 are shown with identical tubes 36 and with a tube in every opening in the headers. If one or more tubes may be removed and openings in the headers plugged, the characteristics of the heater may be changed, for example, with proper burner control to provide hot water more economically at lower volumetric flow rates. Similarly if greater volumetric flow rates are re~uired alternate tubes 36 can be inserted with a greater number of coils and thereby increased length and volume. It is to be appre-ciated that based on standardized headers, by suitable selection of the number and configuration of headers, the efficiency and capacity of the water heater may readily be modified.
~10--.. . .
3~
1 While a taper.ing force fit means to couple tubes 36 to the headers is preferred as for example shown in Figure 4, many other coupling means can be used, including threaded couplings whe~ein a rotatable sleeve may be carried on each end o a tube 36 to engage threaded pro-Jections on the headers Headers and tubes in accordance with the present invention preferably comprise heat treated iron and steel pipe but may comprise any suitable material for the heat exchange operation desired. While water is a pre ferred medium to be heated, the present invention is adaptable for almost any heat exchange operation.
While the present invention has been described with reference to preferred embodiments, it is not so limited, Many variations and modifications will now occur to those skilled in the art. For a definition of the invention, reference is made to the appended claims.
, , ..
~;UMMARY OF THE IN~IENTION
This invention relates to water heating apparatus and more particularly to a water heater with interchangeable heating tubes which can readily be~manually replaced via a single access opening into a furnace enclosure.
BACKGROUND OF TE~E INVENTION
A myriad of water heaters and water boilers are known to supply heated water and steam for domestic, com-mercial and industrial purposes. Many known water heaters and boilers include relatively small tubes to carry water to be heated thxough a furnace enclosureO A disadvantage of many known water headers and boilers is that such tubes cannot be replaced, or can only be replaced with difficulty, for example, by substantial disassembly of the urnace enclosure~ Another disadvantage is that the number of such tubes is selected at manufacture, therehy determining the volumetric capacity of the water heater and flow rates at which water may efficiently be heated.
Once manuEactured the number of tubes cannot easily be changed to meet changes in volumetric needs yet maintain efficient heating.
SUMMARY OF TElE INVENTION
~ ccordingly, it is an object of the present invention to at least partially overcome these dis-advantages of known hot water heaters and boilers by , ; ~ . ,' . , ~23853~
1 providing a water heater with readily accessible, removableand replaceable heating tubes, To this end, in one oE its aspects the present invention provides a water heat.ing apparatus comprising a furnace enclosure with an access opening in one generally planar wall thereof, a fluid conduit system disposed within the enclosure and comprising first heater means;
second heater means generally parallel to the first header means; the first header means and second header means extending across the access opening at opposite ends thereof spaced one from another; a plurality of tubing means providing fluid communication therethrough from the first header means to the second header means; and each tubing means lying generally in a plane normal to the first header means and the second header means, each tubing means comprising (a) a first end releasably sealably coupled to the first header means by 1st coupling means; (b) a second end.releasably sealably coupled to the second header means hy 2nd coupling means; (c) a 1st straight end saction at the 1st end extending generally linearly therefrom toward the access opening, (d) a 2nd straight end section at the second end extending generally linearly therefrom toward the access opening generally parallel to the 1st straight end section; (e) a middle section ~oining each of the 1st and 2nd straight end sections .. . . .. . .
38~3~
1 and extending there~rom between the first and second header means to have portions thereof disposed between the first and second header means farther ~rom the access opening than the ~irst and second header means, the 1st and 2nd straight end sections and m.iddle section providing each tubing means with a configuration, having regard to the location o the first and second header means and the access opening that each tubing means by movemen-t generally parallel to the 1st and 2nd straight end sections can be inserted and wit~ldrawn through the access opening for coupling and uncoupling with the first and second header means, the first and second header means-located sufficiently close to the access opening to permit manual access through the access opening.
to the 1st and 2nd coupl.ing means for manual coupling and uncoupling of the tubing means to the first and second header means~
.BRIEF DESCRIPTION OF THE DRAWINGS
.. .. . .... .. ....... _ _ . .
Further ob~ects and advantages will appear from the following description taken together with the accompanying drawings, in which:
Figure 1 is a front view of a water heating apparatus in accordan~e with a fi.rst embodiment of the pre-sent invention with its access door shown substantially cut away, .
:~3~1~3~
1 Figure 2 is a schematic cross-sectional side view of the water heater o~ Figure 1 generally as seen along section line II-II' in Figure 1 but with the access door shown and the flue pipe in cross-section, Figure 3 is an exploded view of the ~uncture between a header and a tube as seen in Figure 2, Figure 4 shows an end view of a staggered tube, Figure 5 is a cross-sectional side view similar -to that of Figure 2 of a water heating apparatus in accord-ance with a second embodiment, and Figure 6~,is a schematic pictorial representation of the fluid conducting.assembly of Figures 1 and 2, modified for use in production of steam.
DETAILED DESCRIPTION OF THE DR~WINGS
Reference is made first to Figures 1 and 2 which show front and side views of a water heater 10 in accordance with a first aspect of the present invention. The water heater includes a rectilinear box-like furnace enclosure comprising insulated front wall 12, rear wall 14, side wa~ls 16 and 18, top wall 20 and bo-ttom wall 22~ Generally planar front wall 12 has a ma~or access opening 2~ provided inthe uppermost portion thereof which is closed by removable door 26 seen in Figure 2 secured to the res-t of the enclosure by bolts 28. Figure 1 shows the water heater with the outermost perimeter of door 26 shown by dotted lines 29, ,, ' . ':
,ii , . . ~ . . .. .
~3~i3~
1 A fluid conduit system ~enerally designated 30 is disposed inside the upper portion oE the furnace enclosure~ The s~stem includes a Eirst header 32 an~ a second header 34 with a plurality of identical tubes 36 extending therebetween, Water may,~:for example, enter the first header 32 as shown by arrow 40 and pass there-through into each tube 36, then through tubes 36 to second header 34 exiting header 34 as shown by arrow 42.
Headers 32 and 34 are substantially parallel and each extends across access opening 24 spaced vertically from one another at opposite e~ds of opening 24.
Each tube 36 has a first end 44 coupled to first header 32 to place the interior of the tube in communication with the first header and a second end 46 coupled to the second header 34 to place the interior of .
the tube in communication with second header 34. Tube 36 has effectively a first straight end section 48 at first end 44 which extends from the first end 44 linearly toward access opening 24. Tube 36 has a second straight end 20 section S0 at second end 46 which extends linearly toward access opening generally parallel to first straight section 48. Between first strai.ght end section 48 and second straight end section 50 .is a middle section which extends from the first and second straic~ht sections to between the first and second headers and is located between the two headers with portions extending .into the furnace enclosure ,. . .
' . ' ' ' ~3~3~i3~
1 farther rom access opening 2~ than headexs 32 and 34.
As best seen in Figure 2 each tube 36 appears as a series of interconnected S-shaped coils between the two headers. The S-shaped coils.have elongate straight sey-ments 54 generally parallel to first and second straightsections 48 and 50 and.interspaced with front semi-circular segments 56 and rear semi-circular segments 58. The middle section may be seen to extend from each of the ~irst or second straight end sections 48 and 50 as semi-circular segments 56 which smoothly curve.away from access opening 24 toward the other o~ the respective first and second .
end sections ~8 and 50 before extending linearly away ~rom access opening 24 as a straight segment 54.
Figure 3, shows preferred coupling means removably, releasably coupling the ends.of each. tube to the headers, As seen in Figure 3, the wall o.f the pipe comprising header 32 is provided with tapering openings 60 therethrough which are adapted to receive in sealed force fit relation .
complimentary plugs 62 welded onto the end of cylindrical tube 36. Plug 62 tapers so as to reduce its diameter towards header 32. Plug 62 is insertable and removable from aperture fiO by movement of tube 36 in a direction parallel to the straight end section 48.
When door..26 is removed, each tube 36 can be uncoupled at both its ends and removed from the ~urnace enclosure by moving the entirety of tube 36 as a unit . ~ , , .
l in a dlrection parallel to the strai~ht end sections out o~ access opening 2~. .Similarly, a new tube 36 can be installed by inserting it through~access-openi.ng 24, maintaining it in a correct ori.entation whereby both ends may enga~e their respective openings in the header.
As seen in Figure 2, both first header 32 and second header 34 are located sufficiently close to access opening 24 that the couplings between the headers and tubes 36 are readily accessible by a workman outside the furnace enclosure through access opening.24. By mere removal of door 26, a workman can gain access tc the means coupling a tube to the header,.readily uncouple any tube and remove that tube. A replacement tube.may then readily be inserted.
It is to be appreciated.that the.size and configuration of each tube 36, as determin~d by the first and second end sections and the middle section, is to be chosen having reyard to the location of the headers and access opening so that each tube 36 can by movement generally parallel its straight end sections be inserted and withdrawn through the access open1ng for coupling and uncoupling with the headers.
The water heater of.Figures l and 2 includes a burner unit, typically a gas or.oil burner 63 mounted on front wall.12 to extend therethrough and direct primary combustion flame 6~ into an open space 66 within the.furnace enclosure below the fluid conduit system. The lower ~238~;~9 1 portion of the furnace comprising open space 66 is generally referred to as the fire box. Hot gases from combust.ion heat the furnace enclosure and pass upwardly to exit Elue vent 68. Insodoing 9 heat exchange between water in the fluid conduct system and the hot gases in th.e furnace enclosure heats the water.
Reference is now made to Figure 4 which shows an alternate staggered tube 361 to replace tube 36 in Figure 1. Staggered tube 36' is shown in end view which is the view in which tube 36 is seen in Figure 1. Tube 36' appears in side view the same as tube 36 as seen in Figure 2. However,as seen in Figure 4 in end view~the set of each alternate straight segments54a have their axes on vertical plane 70 spaced.to one side from a plane 72 on which the axes.of the other set of alternate straight segments 54b lie. By such staggering of adjacent straight segments, increased heat transfer between heated gases in the enclosure and.water in tubes 36 can be achieved.
In Figures 1 and 2, fire box 66 is disposed.below an upper volume in the enclosure containing the fluid conduit system. Figure 5 shows a second embodiment in which the burner 63 may be disposed at a height above second header 34. In Figure 5, all tubes 36 are coiled so as to provide between straight segments 54c and 54d a substantial vertical separation, to define therein a substantial volume to receive the combustion flame and effectively serve as the fire box. In this case burner 63 .r ~
',, ' ' ' :
, .
~3~
1 is not mounted the front wall but rather may be mounted to one of the side walls 16 and 18 or rear wall 14 to direct flame into the fire box~ Burner 63 is shown mounted in side wall 16, The embodiment o~ Figure 5 has the dis-advantage that it requires a comparatively larger door 26 than that of Fisure 1.
Reference is now made to Figure 6 which shows the fluid conduit system of Figures 1 and 2 modified to be able to produce steam as well as hot water, In Figure 6, ~irst header 32 is an outlet header whose outlet 80 may be closed by valve 82 if only steam is desired to be produced. Header 34 has water inlet 84~ Tubes 36 are to be provided as in Figures 1 and 2 with the path o~ a single tube shown schematically as line 86.
Water return pipe 88 permits water to recycle from header 32 to header 34. Steam from header 32 may rise via T-pipe 90 into two steam headers 92 and 94 and from which steam may exit via exit pipes 96 and 98~ Con-densed water in steam headers 92 and 94 returns to water return pipe 88 via condensate pipes 99.
The embodiment of Figure 6 may be provided in a suitably sized furnace enclosure somewhat taller than that required for the embodiment of Figure 1~ As in Figure 1, the headers,are to be located close to the access opening. Each tube 36 may be withdrawn through the access opening. The additional piping and steam headers of the embodiment of Figure 6 have been located _g_ .. . .
', ~l~3~3~;i3~
1 so that they do not in~erfere with~the ability of each tube 36 to be withdrawn through the access opening as in the case.of embodiment of Figure 1.
In the Figures, piping from water sources and exit lines for hot water or steam have only partially been shown. ~iscellaneous pipiny for:control and safety release valves are not shown.-.It is to be appreciated however that such piping can be readily be arranged to not impede access through door 24 to couple and uncouple-tubes 36 from the headers. ~referably:as shown in the case of Figure 1, all piping connections other than couplings between tubing 36 and the headers are located externally of the furnace enclosure ~or ready access thereto.
. ~. The water heater of Figures 1 and 2 are shown with identical tubes 36 and with a tube in every opening in the headers. If one or more tubes may be removed and openings in the headers plugged, the characteristics of the heater may be changed, for example, with proper burner control to provide hot water more economically at lower volumetric flow rates. Similarly if greater volumetric flow rates are re~uired alternate tubes 36 can be inserted with a greater number of coils and thereby increased length and volume. It is to be appre-ciated that based on standardized headers, by suitable selection of the number and configuration of headers, the efficiency and capacity of the water heater may readily be modified.
~10--.. . .
3~
1 While a taper.ing force fit means to couple tubes 36 to the headers is preferred as for example shown in Figure 4, many other coupling means can be used, including threaded couplings whe~ein a rotatable sleeve may be carried on each end o a tube 36 to engage threaded pro-Jections on the headers Headers and tubes in accordance with the present invention preferably comprise heat treated iron and steel pipe but may comprise any suitable material for the heat exchange operation desired. While water is a pre ferred medium to be heated, the present invention is adaptable for almost any heat exchange operation.
While the present invention has been described with reference to preferred embodiments, it is not so limited, Many variations and modifications will now occur to those skilled in the art. For a definition of the invention, reference is made to the appended claims.
, , ..
Claims (10)
- Claim 1 continued ...
(c) a 1st straight end section at the first end extending generally linearly therefrom toward the access opening;
(d) a 2nd straight end section at the second end extending generally linearly therefrom toward the access opening generally parallel to the 1st straight end section; and (e) a middle section joining each of the 1st and 2nd straight end sections and extending therefrom between the first and second header means to have portions thereof disposed between the first and second header means farther from the access opening than the first and second header means, the 1st and 2nd straight end sections and middle section providing each tubing means with a con-figuration, having regard to the location of the first and second header means and the access opening, that each tubing means by movement generally parallel to the 1st and 2nd straight end sections can be inserted and withdrawn through the access opening for coupling and uncoupling with the first and second header means, the first and second header means located sufficiently close to the access opening to permit manual access through the access opening to the 1st and 2nd coupling means for manual coupling and uncoupling of the tubing means to the first and second header means. - 2. An apparatus as claimed in claim 1 wherein said middle section extends from each of the 1st and 2nd straight end sections to curve away from the access opening toward the other of the 1st and 2nd straight end sections then linearly away from the access opening between the first and second header means.
- 3. An apparatus as claimed in claim 2 wherein the middle section includes a series of interconnected S-shaped coils between the first and second header means, the S-shaped coils being elongate in a direction generally parallel to the 1st and 2nd straight end sections with one cured end of each S-shaped coil proximate the access opening and the other curved end of each S-shaped coil farther from the access opening than the first and second header means.
- 4. An apparatus as claimed in claim 1 wherein the 1st and 2nd straight end sections are conical tapering to reduce in external diameter as they extend toward the first and second ends respectively, and said coupling means comprise tapering apertures in the first and second header means to receive the tapering 1st and 2nd straight end sections in sealing, force fit relation.
- 5. An apparatus as claimed in claim 1 wherein said furnace enclosure comprises a generally rectilinear box member with said access opening located in one wall thereof.
- 6. An apparatus as claimed in claim 1 comprising a plurality of identical, interchangeable tubing means coupled to the first and second header means at location spaced along the length of the first and second header means.
- 7. An apparatus as claimed in claim 1 wherein said furnace enclosure defines a fire box volume therein below the fluid conduit system, and burner means direct flame into the fire box volume.
- 8. An apparatus as claimed in claim 7 wherein the first header means is located vertically above the second header means, and burner means is disposed in the furnace enclosure below the second header means.
- 9. An apparatus as claimed in claim 8 wherein the burner means is coupled to the planar wall in which the access opening is located, below the access opening.
- 10. An apparatus as claimed in claim 1 wherein all couplings to the first and second header means other than between the first and second header means and the tubing means are disposed outside said furnace enclosure to permit ready access thereto.
1. A water heating apparatus comprising:
a furnace enclosure with an access opening in one generally planar wall thereof, a fluid conduit system disposed within the enclosure and comprising:
first header means;
second header means generally parallel to the first header means; and a plurality of tubing means providing fluid communication therethrough from the first header means to the second header means, the first header means and second header means extending across the access opening at opposite ends thereof spaced one from another, each tubing means lying generally in a plane normal to the first header means and the second header means, each tubing means comprising:
(a) a first end releasably sealably coupled to the first header means by 1st coupling means;
(b) a second end releasably sealably coupled to the second header means by 2nd coupling means;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000491104A CA1238539A (en) | 1985-09-19 | 1985-09-19 | Boiler construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000491104A CA1238539A (en) | 1985-09-19 | 1985-09-19 | Boiler construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1238539A true CA1238539A (en) | 1988-06-28 |
Family
ID=4131429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000491104A Expired CA1238539A (en) | 1985-09-19 | 1985-09-19 | Boiler construction |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1238539A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010144514A3 (en) * | 2009-06-12 | 2013-08-15 | Burnham Services, Inc. | Watertube and method of making and assembling same within a boiler or heat exchanger |
| EP2944873A4 (en) * | 2013-01-10 | 2016-01-20 | Panasonic Ip Man Co Ltd | RANKINE CYCLE DEVICE, AND COGENERATION SYSTEM |
-
1985
- 1985-09-19 CA CA000491104A patent/CA1238539A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010144514A3 (en) * | 2009-06-12 | 2013-08-15 | Burnham Services, Inc. | Watertube and method of making and assembling same within a boiler or heat exchanger |
| EP2944873A4 (en) * | 2013-01-10 | 2016-01-20 | Panasonic Ip Man Co Ltd | RANKINE CYCLE DEVICE, AND COGENERATION SYSTEM |
| US9638066B2 (en) | 2013-01-10 | 2017-05-02 | Panasonic Intellectual Property Management Co., Ltd. | Rankine cycle apparatus and combined heat and power system |
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| MKEX | Expiry |