US1621374A - Boiler construction - Google Patents

Description

March i 15, 1927.` 1,621,374

v w. F. MCPHEE BOILER CONSTRUCTION y Filed June 28, i923 Patentedll/Iar. 15,1927. 1

' Bo'ILEit-'oonsrnucrroim Applicationmeairune 2e, 1923*., serial No". 648,324;Y 1- f My invention relates to improvementsin boiler Constructions, and 'consists inthe combina-tions, constructions,"` and arrangel ments herein described and claimed.

-An object of my invention is to provide a device of the type described, which hasnovelfmeans for drawing the gases of combustion downwardly about the combustion chamber after they have-passed to the top' A further. obgect .ofmy invention is to prmidefa device of the type described in Cil which the flue Which..ca1'i'ies the `gases off, combustionV downwardly from the top of. the combustionV chamberl .is concentrically disposed around the combustion.` chamber,` whereby the flue acts as a yheat radiating lin.

A 'furthe-r' object of `my invention is to provide a vdevice of the type described in which the combustionV chamber is provided With corrugatedvvalls, and in ivhichA the fine that conveys the gases of combustion from the comblustion chamber .to thechimneyyis provided with an'ova'hshaped gas conductingpassage, Vwhereby the Walls of the combustion chambery andthefvvalls of thev flue provide Va relativelyV great heat .radiating surface. i i e A. furtherobject o f-myinvention is to provide a device of the type described which has Water receiving means disposed .Within the combustion "chamber, thereby providing additionalivater heating surface tothe .de- V109.

in thefllbvving. specification', and the novel features of the invention Will be particularly pointed out in the appended claim.

My invention is illustrated in the accom panying drawings forming part of this device,V in Which Y Figure l is a side elevation of the device, portions thereof being broken away.

kFigure 2 is a section lalong the line 2--2 of Figure l, and

Figure 3 is a section along the line I of Figure 2. l

In carrying out my' invention I' provide a Water containing receptacle 'l which hasa combustion chamber 2 mounted therein. Thechamber 2 is centrally disposed in ythe receptacle l, whereby the Water withingthe L ;ec'eptacle will entirely surround the cham- L'er 2.

vtion Within the chamber 2.

i In the presenti.,` form lof deviceet-he' y ,Ulsllrlv-:Df"rA'rEs Per EN rfi..erica chamber V2 islfadaptedto burn. coa'lffand is;- therefore provided with a .grate construction indicated generally at... Aiireidoor 4; is

.carried bythejlreceptacle'l and permits com# municationlfrom theerrteriorz offthe recepl tacle tfol the 'chamberj2, Jl A' tubing 5 extends from `theydoorlt to ythefcha'mber. 2 yand'is disposed above v,the grate; 3. 'Adra-ft or ash door 6 disposed,-V beneathfthe door .it and laid-communication With-the ash-pitf? of ff the clramber 2 by means of .t'heftu'bing'ad The combustion -chamber f2 v-is :construeted.

so as Vto afford the n'ia'Yii'ni-un. amount of heating surface to the' Water` `within the receptacle if jTorthis endrIvhaveprovidcd the `chamber Withfcorrugated vertical Walls. 9, (see Figure), and Witha corrugated' top. l0,"(see Figure In addition to this I have disposed 'flat .'vvater .containing coils" 1:1l

Within `the?interior'ofthechamber 2, (see Figures 2 and 3). shape 'shown tin Figure C Sfand. 'have their ends 12 and :13 secured r' innipples which in The coils are of the vso turn lare .carried the vWall o fl the 4chamber 2.l In Aorder .to.'.provi'de-an easy assembly.

of the Vcoils to the'chamber, 'I provide the nipples oi; vunionsnvith'-, left 'and right-handv Vscrew threads,'t Wherebyitheinipples need but be rotated. VVin nemdirectioni to sec-ure fthe coils Vtofthe"nipples lfand` the nipplesto .the ff furnace.. The nipples are in communication with. the Water Acontained by the .receptacle 1;"

and-permitithefwaterto flow linto thezcoils l-1.'It. will bexnotedvfrom f Figure 3 that r .A Y x thejendsl?fandllf if-:fthe coils lare;disposedI` other Objeets and adrantaseewill,appear diametriclally.: .opposite 'froin f3 each J*oth er,l

Wherebylany expansion-:ofIthe'icoils dueito'?V heat Willcause the endsof the coils to more pulling away from the nipples. In this manfirmly engage With the nipples lll instead of Y ner the jointswhich-secure the coils to the' are passed directly into the chimney upon leavingy the top ofthe combustion chamber. TIt is obvious that a large amount of the heat will pass With the gases of combustion into the chimney. In the present form ofl the device I have disposed a flue 15 concentriwhich I amavvare, the gases of combustion Y,

lio

cally With the chamber,k 2, this Hue communi- `eating with the compartment 1f? bynieans of a pipe= 18. Theflue 15 is integral with the casingl, and is s aced therefrom, byv lugs 3.0.

It will be noted rom Figure 2 thatthe4 flue;

to the wall of the. receptacle 1, thelue being. l

spaced slightly from the chamberv andreceptacle. The compartment 17;.'is inY communication with the chimney, (not shown) by means of a pipe 19. The chimney will Vdraw the gases of combustion from theV combustion chamber. 2 in the ordinary manner.

` TheV gases, how-ever, will pass through the openings 16, will flow through the coils of the flue 15, through the pipe 18, the compartment 17, and the pipe 19 before they will pass. into the chimney. In this manner,

"f the gases are.v moved downwardly through theilue 15, thereby giving up all of the heat to the water in the receptacle 1 through the Y walls ofi-the flue 15.

` various parts ofthe device,

From the foregoing description of the the operation thereof may be readily understood. Water is conveyed to the receptacle v1 by means of a water inlet pipe 20. and is carried away by means ofthe pipe 21. It is obvious that the receptacle can be used as a steam boiler if desired, the pipe 21 in this instance conveyingsteam vfrom the receptacle instead of hot Water.

The device is operated in the same manner as is an ordinary furnace. The coal or other combustible, material-is passed through the lire door land is deposited on thegrate 3. The ashes which accumulate in the ash pit 7. are removed through the ash door 6 when necessary. The principall advantage lof this dev-ice over other devices of like construction lies inthe fact that all of the heat is removed from the gases of combustion-before the gases pass into the chamber. This isaccomplished by the flue15 which causes the gasesofcombustion to travel downwardly. In addition to the flue 15, the` device is providedwith the flat water coils 11, which further aidy in heating. the water within. the

since the walls of thechamber'are corrugated. The device isreadily assembled, and is not likely to get out of order easily.

`rEhe flue 15 is provided with integral outwardly extending stub pipes 31, these pipes projectingthrough the wall of the receptacle 1 (see Figs. l and 3). Plugs 32 normally close the ends ofl these pipes.y IVhen the iue needs cleaning, it is merely necessary to remove the plugs 32 and insert a flexible wire brush through the different pipes. The brush will bend in conformance with vthe curvature of the flue, and will quickly remove the soot, etc., that has become lodged in the fiue. AThe bottom ofl the compartment 17 opens into anash pit (not shown), the open end being normally closed by a slide 34. y

The floor 35 of the receptacle 1 isdisposed above the draft door 6. The water. within the receptacle only surrounds the. combustionl chamber between the grate 3 and the top of the chamber. In this manner, the entire body. of water is in contact with surfaces which are being heated. E

I claim'z.

A device ofthe type described comprising a combustion chamber having corrugated walls, a water-containingv receptacle enclosing said combustionA chamber, vspiral coils WILLIAMI FRANCIS MCPHEE.

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