US1682692A - Locomotive boiler - Google Patents

Description

Aug. 28, 1928.

A. W. BRUCE LOCOMOTIVE BQILER #Shets-Shct 1 Filed Feb. 7, 1927 TOE I Aug. 28, 1928.

A. W. BRUCE 'LocoMo'rIvE BOILER 4 Sheets-She, 2

Filed Feb. 1927 .N V m WIT ESSES Aug. 28, 1928.

WITN 53 ES A. W. BRUCE LOCOMOTIVE BOILER Filed. Feb. 1927 4 Sheets-Sheet 4 l 'atentecl Aug. 2%, i928.

UNITED STATES ALEBED W. BRUGE, OF NEW YORK, N. Y.

LoooMorrvn BOILER.

Application filed February 7, 1927. Serial No. 166,391.,

present invention is particularly directed to an improvement in the boiler of my patent aforesaid, and comprises a simplification oi the feed water connections between the firebox. and the barrel sections of the boiler, aniniproved.connection of the Water tubes to be steam drum, the provision of a backhead adapted to support the drum with the capacity of relative movement, and the. embodiment of a readily insertible and removable bridge wall at the forward end of the fire'chamber. f l

The improvement claimed is hereinaiter fully set forth. j

In the accompanying drawings: Figure 1 is a vertical longitudinal central section through a locomotive boiler embodying my invention, Fig. 2, a one-half horizontal, lon gitudinal sectiontllrough the middle plane of the boiler; Fig. 3, a view, halt in rear elevation, and haltin vertical section on line TIL-J11 of Fig. 1; Figs. l, 5 and 6, vertical sections, on the lines IVIV, VV and VI-VI, respectively, of Fig. 1; Fig. 7, a vertical longitudinal central section through a locomotive boiler illustrating a structural modification of my invention; Fig. 8, a hori: zontal haltsection thereof; Figs. 9 and 10, vertical transverse sections, on the lines IX-IX and XX, respectively, ofFig. 7 5 and Fig. 11, a section on the line XIXI of Fig 10. p y

In the practice of my invention, referring descriptively to the specific embodiment thereof which is herein exemplified, the 10- comotive boiler comprises a fire box, A, and a boiler barrel, 13, connected thereto, through which barrel there extends a plurality of the tubes, 1, in the ordinary manner, A com bustion chamber, D, is termed in the forward portion of the firebox. 'Ahollow mud.

ring, 3, is connected to thebottom ends of, andsupports, a plurality of water tubes, 10,

1 which are set closely together and form the sidewalls of the firebox, A. The water tubes, 10, are preferably, as shown, staggered at the points of their connection to a steam drum, 11, which extends horizontally and forwardly from the back head, a, into the barrehli, said drum being supported in,[and

passing freely, by a slipjoint,through the outer sheet, 6, of the back head of the fire box. The staggered disposition of the up per ends of the side water tubes, provides additional metal between the receiving apertures in the wall of the drum, and thereby aliords a proper factor ofsat'etyior the drum, without necessitating forcing means. e y e y The back head of the boiler comprises a plurality of water tubes,- 4:, extenlding up additional reinq PATENT OFFICE,

wardly across the back of the firebox, and

an outer sheet, 6, of substantial thickness, the upper portion of which is riveted to a wrapper sheet, 15, and which issecured, at bottom, to the mud ring,l The water tubes, 4:, are connected, at their bottom ends, to, and supported by, the transverse rear portion ot the mud ring, and, extendingupr wardly, are secured, at their tops, to the wall or the drum, 11. A saddle shaped water cooled bridge wall, 9, is supported on the transverse iorward portion of the mud ring, sa1d bridge wall extending across the fire box, and having water passages, 9 com l municating with the mud ring, between the rivets by which it is secured thereto. The bridgewall is preferably secured only to the mud ring, so as to permit it to expand and contract freely, and the transverse forward portion of the mud ring is inclined upwardly toward the longitudinal centralplane' of the .iire box, so as to provideroom.iorasuitable feed water connection, 17, of are barrel with the mud ring. Arch tubes, 12 ,which support a fire brick. arch, 13, are secured to the bridge wall, through which theybommunicate with the front of the mud ring, and ex tend upwardly and rearwardly' to thedrum, 11. r

The sides of the combustion chamber, D,

are formed ofwater tubes, 10,whichiorm continuous walls with the water tubes,10, of-the fire box, and confornnjin curvature, with said tubes, above the horizontaln iddle plane of theboiler. The tubes, 10 and 10 are, at their tops, connected to the drum, '11, and, at their bottoms, to the mud ring, 3,

connection provides a passage for water from the barrel to theubottom ends of the) and to the feed water connectiomxli, lead mg from the barrel to the mud ring. This water tubes, 10, of fire box, the arch y I of the firebox, is connected to the barrel, B,

tubes, and the Water tubes of the back head. A wrapper sheet, 15, which covers the top and tube sheet, 2, said Wrapper sheet performing the function of firmly connecting the fire box to the barrel of the boiler, and

imparting strength and rigidity to the entire structure, and also of forming a housing or casin for the top of the fire box.

Suitable agging or insulating material, l6, isprovidedfbetween the outside of the I water tubes, 10, 10*, and. the inside of the Wrapper sheet, 15, and similar materialis also applied between the back head tubes, i,

and the outer sheet, 6. The forward end ofthe feed water connection, 17, is supported b .the downWardextension, 2, of the tube s eet, 2,which is securedto the barrel, and

' 4; and, 12, and the drum, 11, are free to expand or contract within the rigid structure comprising the barrel," B, the throat sheet, 2,the wrappersheet, 15, and the rear the box sheet,6. The drum, .11, is also free to move longitudinallyin' expanding or con traeting, as it has merely a snug and supporting fit in the rear sheet, 6. i

the steam space thereof;.a fee Figs. 7 to 11 inclusive illustrate a structural modification, in which the ordinary Waterspace back head, havin inner and outer sheets, 5, and 6, connected y staybolts, 7, is applied. The bridge Wallbetvveen the Y firelboxand combustion chamber is also 40 diiferen tufrom that before described, in being formed of fire brick.

Iclaim as my invention and desire to secure by Letters Patent: i V 1 In a locomotive boiler, the combination of a barrcl; a fire box, comprising a combustion chamber and a fire chamber; a back head, having a rigid outer sheetiand closing the rearof thefire chamber; a drum, sup ported, and fitting freely, in the back head, and extending forwardly therefrom into the barrel; water. tubes forming the sides of the fire and combustion chamber; a hollow mud ring, communicating With the Water tubes of thefire chamber; a tube sheet secured to the barrel and closin the rear of Water communication, leading from the barrel to the mud ring and communicating with the combustion chamberwater tubes; and awrapper sheet, secured to the barrel and to the fire box,and performing the functions of rigidly connecting said memberstogether, and forming a'housing covering the rooflofthelfire box.

p 2; In alocoinotiveboiler, the combination of a barrel; a fire box, comprisin a combustion chamber and a firecham er; a back head, having a rigid outer sheet and closing the. rear of the lire chamber; a drum, supported, and fitting freely, in the back head, and extending forwardly therefrom into the barrel; Water tubes forming the sides of the fire and combustion chambers; a hollow mud ring, communicating with the water tubes of the? fire chamber; a water cooled bridge Wall, mounted on the mudring and secured rigidly onlythereto, and extending across the fire box, and a Wrapper sheet, secured to the barrel and to the fire box, and performing the functions of r-igidlycom meeting said members together, and forming a housing covering the roof of the fire box.

in a locomotive boiler, the combination of a barrel; a fire box of side water tube construction, comprising a fire chamber and a combustion chamber; anupper drum, into which the watertubesofthe fire box lead, said drum having a supporting engagement with the lire box and being free to move relati'velythereto in expansion and contraction;

and a wrappersheet, secured to the barrel and to the tire box, and performingthe function of rigidly connecting saidmembers together, and forming a housing covering the roof ofthe fire box. t i

4c. In a locomotive boiler, the combination of a barrel; a lire box of side water tube con struction, comprising a fire chamber and a combustion chamber; a drum extending horizontally through thetops of saidchambers, said drum being free to move relatively thereto in expansion and contraction; a common feed Water connection, leadin from the barrel to the side water tubesof lie firebox andcombustion chamber; and a wra per sheet, secured to the barrel and to tie fire box, and performing the function of rigidly connecting said members together, and forming a housing covering the roof of the fire box.

5. In a locomotive boiler, the combination.

fronrthe barrel to the bridge Walland the lower cylindricalt drums connected by side Witt-61' tubes; a" drum,supp0rted, andfitting freely,in the back head ofthe firejchamber;

a hollow mud ring, Se-

'struction, c'omprising a firechamber and a e combustion chamber composed of upper and anda Wrapper sheet,rsecured to the barrel andto the fire box, and performing the funiition of rigidly connecting said meinberstoget-her, and forming a housing covering the roof of the fire box.

7. In a locomotive boiler, the combination of a barrel; a firebox of side Water tube construction, comprising a fire chamberand a combustion chamber; a rear tube sheet, de pending below the bottom of the barrel; a

water connection from the barrel to the Walls of the fire box, supported by a down- Ward extension of the rear tube sheet; and a Wrapper sheet, secured to the barrel and to the fire box, and performing the function of rigidly connecting said members together and formlng a houslng coverlng the-roof o the fire box.

8. In a locomotive boiler, the combination of a barrel; a fire box of side Water tube con struction, comprising a fire chamber and a combustion chamber; a rear tube sheet, (le

pending below the bottom of the barrel; a

Water connection from the barrel to the, WtllS of the fire box, supported by a down- Ward extension of the rear tube sheet; a

cover, closing a manhole in said connection and permitting access thereinto; and a Wrapper sheet, secured to the barrel and to the fire box, and performing the function of rlgidly connecting sa d members together,

and forming a housing covering the roof of the fire box. i i

p ALFRED W. BRUCE.

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