US1564875A - Fire arch for locomotive boilers - Google Patents

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E R MANOR FIRE ARCH FOR LOCOMOTIVE BOILERS Filed. June 18 19,24

Dec. 8, 1925. 1,564,875

E. R. MANOR FIRE ARCH FOR LOCOMOTIVE BOiLERS Filed June 18, 1924 5 ShetS-Sheet 2 jm zwy E. R. MANOR FIRE ARCH FOR LOCOIIOTIVfl BOILERS Filed June 18, 1 ,924 3 Sheets-Sheet s Patented Dec. 8, 1925.

UNITED STATES App1iation newline 1 1524. Seria1No. 720,786.-

V Z '0 all whom it may concern.

Be it known that I, ELI R. MANOR, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Fire Arches for Locomotive Boilers; and I do hereby'declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art ,to which appertains to make and use the same.

My invention provides anextremely Simple and highly eflicient air-ventilated fire nordance with my .invention, the air is supplied to the air passages of the blocksdirectly through the side plates of the fire'lbox and the air thus drawn in through thefire blocks or tiles of the arch will be superheated and delivered into the combustion chamber of the fire box, thereby intensifying the combustion'and producing more rapid initial combustion with the resulting greater economy in the use of fuel and elimination of the smoke nuisance. I w

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several-views.

Referring to the drawings: j v

Fig. 1 is a fragmentary verticalsection taken from front to rear through thefire box of the locomotive substantially on the line 11 of Fig. 2;

Fig. 2 is at'ran'sverse section taken on the line 2-2 of Fig. 1;. I v

Figs. 3 and 4 are perspective views showing in detail certain of the arch blocks or tiles illustrated in Figs. 1 and 2; i

Fig. 5 is a transverse section on the line 5-5 of Fig. 1;

Fig. 6 is a plan view showing a portion of the arch, some parts being broken away;

Fig. 7 is a fragmentary vertical section on the line 7-7 .Of Fig: 6 l

rmii' ARCH. roeroooivrorrvn BOILERS.

'Fi 8 is a view corresponding'toFig. 5, but i 'lustrating a the blocks; and v 'Fig. 9 is a view corresponding to Fig. 7, but illustrating a further modified form of the arch blocks.

The numerals 10' and 11 indicate, respectively, the shell of the fire box and the surv rounding boiler shell, which parts are of the slightly modified'forin of 1,564,875 ATENTT. OFFICE;

ELI nomaivomforsrl PAUL, ammo. a :11

customary well knownarrangement,spaced to form a water space 12 that surrounds and overlies the fire box. The numeral 13 indicates the customary fuel supply passage normally closed by the'customarydoor, not shown. The numeral 14 indicates the arch fiues that extend from rear'to front through the combustion chamber, are forwardly 1nclined, and connect the front and rear portions of the water space or 'leg' '12. The numerals 15 indicate clean-out plugs applied to the boiler shell 11 in line with the ends of the archtubes 14. This is the customary arrangement of arch tubes and, as already stated, such arch tubes have hitherto been used to support'arch-forming blocks or tiles.

' Preferably, the arch is made up 'of highly refractory blocks or tiles 16 and-17 of the form illustrated in Figs. 1, 2, 3, 4, 5, 6 and 7. The blocks 16, at the under sides of their end portions, are formed with segmental notches 16 that fit and rest upon the'arch tubes 14, and the blocks 17 that are at the sides of the arch are provided at their inner ends with similarsegmental notches that also fit and rest upon the arch tubes. outer ends, the side blocks 17 are formed with recesses that adapt them to be telescoped onto the inwardly projecting ends of short air intake tubes 18 that extend directly through the sides of the outer shell 11 and firebox'lO. These air intake tubes 18 are flanged and expanded in the sides of the shells 10 and 11, so that fluid-tight joints are formed 1 and the inwardly projecting ends thereof-afford supports for the'outer At their ends of the said blocks 17. Preferably, the. said air tubes 18 are of highly refractory alignment register with each other, so that they form a complete transverse air passage. The arch blocks illustrated in Figs. 1, 2, 4, 5, 6 and 7, at their abutting ends, 6 are formed with interlapping tongue and groove joints at 21 that 'hold the blocks against shifting movements forwardly and rearwardly of the arch, but the block shown in Fig. 1 has a simple flat end. Bothjtypes of blocks just noted, however, are provided with relatively small air discharge passages 22 that lead' upwardly to the tops of the blocksfrom the mainair passages and deliver air to the top of the a-r ch. In the --form of the arch shown in Fig. 8, the blocks are further provided with small air passages 23 that lead downwardly 'to the.

-upper portion of the/arch and, hence, in--v ten'sify the combustion at this turning point :-,and,-moreover, assist in keeping down the temperature oft-he-blocks at the place where the fia'meslap around the blocks and would otherwise have maximum fusingaction on thevblocks. The blocks atthe frontedge of the arch, adjacent-to the-'low front w'allof the fire boX,'may be and, as=shown, are slightly spaced from the said firebox by laterally spaced relatively small spacing blocks or fire tiles 25-placed on the: lower endsof the arch tubes 14, as shown in Figs. 1 and .6. .This arrangement permitsypassage of some of the flames directly through the front and lower portion of'thearch.

In assemblying the blocks of the arch, "the blocks 17 should first 'beielescoped onto the projecting ends of the air intake tubes 1=8 and rested on the outer arch tubes 14 and then the intermediate blocks may' -be readily dropped into, position. The-air intake tubes are thus not only utilized to at least in part support the vblocks 17,.but they hold the said blocks against shifting movements forwardly and rearwardly and insure the main air passages QO always being in line with the air intake passages through the sides of the fire box.

Ofeourse. the fire bloc-ks will become very iniFig. 9igives a more complete and better .in Fig. 6, the blocksof the arch are interhot in the operation of the locomotive, so

that air drawn in by suction or partial vacuum will be heated to high temperature pinto thecombtistion space above the arch, but otherfkinds of fuel will burn with, the

greatest kind of -,efficiency when the air is-discharged both above. and below the arch. For example, in the use of .high combustion '-fuel,'such as coal, that burns rapidly and with a quick=flash, it is better to introduce the superheated air at the upper rather than at the. lower portion of the arch, for the reason that introduction of the hot air below the arch would tend to rapidly hasten the combustion and. cause the flames .to flash from the fuel door when opened. In certaln slower burning coals or fuels, the lntroduction of. the superhetated air .both above and ,below the arch willgive the vbest results.

However, these are conditions best determined by experiment. The -vert1cal and oblique arrangement of a1r passages shown distribution of the superheated air, but the .more simple-arrangements illustrated will properly meet most conditions. By xinterlocking the'ends of the..blocks as best shown connected so that theycannot shift out of mrelativepositions, even if some of the-spacing-blocks 25 oroth-er blocks of the arch should giveaway.

What I claimis:

A-boiler of thelocomotive type provided with arclrtubesextended through the fire box thereof from the surrounding water space, incombination with arch-forming blocks supported .on said arch tubes with their ends abutting above said tubes and provided witlraligned air passages extended transversely through the arch and delivering into the combustion chamber, and-intake tubes extended directly .throughuthe sides of the boiler-and projecting-into the aligned a1r passages and assisting and supporting adjacent blocks, said air intake tubes being provided on both sidesof the [ire box, each transverse 1 row of arch forming blocks having the transverse air passages noted,

,7 and there being oneair intake tube injected into eaclrend or each of the transverse air passages of the arch tor-med by said blocks.

In testimonywhereofI affix my signature.

ELI MANOR

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