US1591214A - Steam superheater of the multiple smoke or fire tube type - Google Patents

Description

July 6 1926.

P. H. HANCOCK STEAM SUPERHEATER OF THE MULTIPLE SMOKE 'OR FIRE TUBE TYPE Filed Nov. 23,1925

3 Sheets-Sheet l 00000.00. .w 00000 00 H @Gru w N M Q w $5 00009@ o0@ ndhd nun ad d IIEJLWNNNMH O0@ @G .OGOGOO OQO @Mw Sue e.. he una.. e wuwvd000x 00000000000 @s nauw Tfn www4 anunnun 00 0 M m. 00000000000 Il T|| n |I\ @W n ueu en., Www/@0000 00000000000 Mmwwulhahm This awmww000 00000000000 vs e une e. @Q ...wluwd000- 00000000 000 T- Lnnnua 000 00000000000 @AJ une e s... ne e -W. NuudOw 34nd. .Iulhs ."NIH l l an. H ,s www e=wv=su php -Wand 0 0 0 0. 0000. 0 0 0 0 0 0 n T S INVENTOR. PERC'YVv HAMILTON HANCOCK BY 0/ ATTORNEY.

` July 6 19:26,l l

` Y 1,591,214 P. H. HANCOCK -STEAM SUPERHEATER OF THE MULTIPLE SMOKE 0R FIRE TUBE TYPE l 3 Sheets-Sheet 2 Filed Nov. 25, 1925 l IN VEN TOR. PEQCY HAWLTOH HANCOCK T v I ATTORNEY.

July M1926. 1,591,214

P. H.`HANCOCK STEAM SUPERHEATER oF THE MULTIPLE SMOKE on F1111: Tum: TYPE Filed Nov. 25. 1925 s sheets-sheet 's 'INI/ENTOR. P5120( HAWLTOH HANCOCK BY y,

ATTORNEY.

- BERCY HAMIL Patented 'duly 6, 17926.

' sTEAMsUrERHEArER onT'HnniuLTiPL-E.sMoKn'fonFiREiTuBElTYrE; Y i

Application med November 2a, 1925', seal ma. =7o,s1o,`anairnereae Britain :rii'neia 192,41."

This invention relatesto steam SillOGIvlleat-'I ers of thesmokeor fire tube'tylpe' inv-Which the steam Vsuperheating pipes :or superheater 'telementscomprise U-loop portions or pipes vwhich -eXtend into ythe smokel or firev tubes ofI the boiler` and each elementl has its satu rated'steam inlet end and superheated 'steam outlet end connected to a header ornhea'ders in the'smokebox ori-uptakefof the boiler either vabove 'or toione side of the nest 'of smokeor fire tubesintow ich the U-pipes of theelementsextend. v".Fhepresent invention has been n :primarily designed for Y Vapplication to marine boilers of the Ajsmoke; f-.orrreftube type Asuch as `for instance the WellV known `Scotehnarine boilers, but theinventi'on isnot necessarilyrestricted to ma'- t rine boilers;

. ofthe type abovementioned which possesses or f proYides several rvimportant p.praeticalin/avd-'Y vantages as 'compa-red; With-.steamfsuperheaters. of theV smoke .for (lire, tubetypees heaters ,as tted tov marine boilers,' butfalso 4provides greater facilities vfor disconnecting' the Velements and vvithdratving` them from the boiler smoke tubes when necessaryfto do so7 the construction andfarrangements bef ingrsuch that every'element appertalningto .anest or -groupmof the boiler Vrsmoke' tubes` vcanV be individuallj-,f vor 'independently-fA andV easily Y disconnectedg'from ythe header g onV headers and Withdrawn fromrthe smoke tube bolts byirvliichthe elementsaife coupled ory n secured to` the saturatedl and Asupeilfieated,v` steam headers (or itmaybegtoasingle or'tubes to Vwhich it appertains Without rer-1;:l moving oiivdisturbing anyl other element, ap,-V

pertaining tpo the groupA or nestof smoke n tubes and Without the necessity "ofspecialev V- and complicated bending ofthe saturatedV steam. inlet andsuperheated lsteam outlet end portions ofthe element which lie*v or extendy Withintheluptake or smokebox of the-boiler;

lFurther the fastening nuts of the ystuds Vor The V:present invention ,.forfits princi.' p alobje'ct to provide 4a steam superheater 1 ToN HANcocKyon 'THQRNT'ON'Y'HEATE ENGLAND, .AssGNoR To '551m ,SUPERHEATER'CQMPANEferrNewqrbRKfN-'Y-f f header havingV saturated'and superheated yif diseo'nneeting the elements than j in existing' vI superheaters ofthe type;l toQWhieh the pres.- Y ent invention l* relates.V i,vVl`urther,gall;v vthefsuvperheater elements appertainingfto:aigronpf i i or -nest,or it maybe to tvvoor more .g1-longs p' or nests,` of the boilensmokeftuhes uniform or substantially'so) one/With other so that all or Vnearly all ofthe elements Which-have the same-numberof*U-pipesare interchangeable. urthereaeh` element, ret-Q mov-able from its smokejtub'es individually M 3 other element, as abovel VmentionsdLcanl be f readily Vvvithdravvn fromfits smoke tubes by .t

a simple straightl orv'vardjmovement `of ,the 1 and; independently-fofiitheemoval 4ofiV every elementwithin, the une. Qffpfhegroup of smoke Ytubefsifntowhich it extends.

. ,Y 'lhepresentinvention principally consists Y in a steam,-superheatei-oithe type above e speeiliedY in which superheater elements api' Y pertainingto a Vrovvfor ladjacent Vrovvs of Vsmokel stulgiesjhzave ltheir saturated'steam` inlets' `andfsuperlieated steamoutletends connected .n to ia plurality-of* membersfone yfor each ele'-V 'l ment," having steampassages. therethrough which lie transversely g' o'f theflongitudinalf centre lines,ofthesaid sm oketubesthesaidgcuy y members beingarrangedk with the"respective 1 steampassage's lin lineand beingdetachasblyl rsecuredtoone anotherv and to the headenj4 Thesaid 'header isasusual fitted in ithebsupyf take or v'smokebox of r.thepbo'iler fand in7 thef4 e case vofaJsuperheater"fora,inarinefboilerl the header or headers Wou1d, as usual, be

ranged vertically in'theuptake-.and opposite".` the spacesbetvveen thev several; nests olf-the# boilergsmoke'y tubes appertaining to themsev eralfurnaeesfof thejboiler..v 2 i yThe above-mentioned members provided-,at each'endwith means for icou,-

n Y ktot;T the 'ends' o .f the elements areconnected. are

their steampassagees `i in line,'hsuch meanswiV compr1s1ng,.for instance'jlanges and'fbolts 0r other fastening devices, andthe members alfe of such @length `that Wlfllv those bel-Chg;

ing to `the elementsi` appertaining lto, a" 'row .Y v header or headers by the flange or plate on` arrangement being such that any member may lbe. disconnected from the remaining members and from theheaderand, together with the element to which such disconnected y,

drawn to a largerscale'than that of Figs. 1

member appertains, Vbe removed from nthe boiler without disturbing any other element vor breaking any joints other than those at the opposite ends of the 'said disconnectedthe superheater illustrated in Figs. 1 and 2.

member.

Further according to this invention, in a embodiment for application to a marine boiler of the multiplel smoke or fire-tube type, the saturated steam inlet end and superheated steam outlet Vend or" each of the elements appertaining to smoke tubes in each horizontal rowor in each of two adjacent horizontal rows are connected with (for instance weldedy to) two transversely Yarranged and preferably parallel pipes or tubes on the vopposite ends of which tubes are provided 25" plates'or flangesvin which the ends of the said transversepipes'fare fixed (for instance expanded), the'end portions of each element,

extending from the boiler smoke tubes to the said transverse pipes being plain straight endsk without any bend between the boiler tube plate andthe said" transverse tubes, with the 'possible exception of a slight bendingof the vouter ends the transverse tubes. For fitting lup or coupling together the ends of the several elements appertaining to the same horizontal row or rows of smoke tubesthe above` mentioned flanges ory plates on the transversely arranged tubes of adjacent elements are brought together in a vertical-plane and selcured together by means otstuds inbefore mentioned vertically arranged main header or headers may be secured to the said the ends of said transverse pipes-adj acent to the header being secured by studs orbolts andnuts either directly -to suitable faces on l c1 portion V-effva marine boiler showing the boiler tube plate for attaching same to' or bolts' and nuts. The plate or flangeA onfthe transat uptake end oit the boiler', and illustrates one half of a superheater according'to the presentV invention.

Fig. 2 is a plan view, partly in section, of Fig-1. l

Figs. 3 and 4t are respectively a sectional elevation and a'plan otaportion of the boiler and one of Vthe superheaterY elements,

and 2'.- y Y Figs. 5 and 6 are, respectively, a side elevation and planpof the' main-headers of box or uptake endV of the boiler, and 2 are the boiler smoke tubes arranged, Vas usual, in groups or nests appertaining to thefrespective furnaces of the boiler.

3 are the .main headers or" the-superheater arranged vertically y inthey uptake Yoi, the

boiler; these headers Awill be hereinafter more fully described.

As shown in Figs.` 1 and 2 thereisa plu-v j ralityot superheater elements having U- loops or U-'pipes extending into smoke tubes- 2 in each of two adjacent lateral or horizontal rows ofthe smoke tubes,. and each of the superheater elements appertaining to the smoke tubes in the said rows has a num; ber of U-'loops extending-into a corresponding number of smoke-tubesin the said rows, thesebeing known arrangements. 'fV

As hereinbefore mentioned the 'saturated steam inlet and superheated steamy outlet ends `or end portions respectively 4, la oit each ofvtlie-superheatery elements are connected lwith a tubular'member arranged transversely or` at right angles to the said ends or end portions 4, la of the element, the said tubular members in the embodiment illustrated in the drawings consisting of two lengths or pipe or tube 5 and 5f arranged side by side,

the ends of these pipes being secured, forl instance expanded,A in'Y holes in plates or j anges'G and 6a, the end-of the saturate-d i Y 1 steam inlet pipe 4 of r`each elem-ent being the side of the header or headers or to` secured, 'for instance welded, inV registration with a hole or port in the tube '5 andthe superlieated steam outlet end Pof the ele-v mentr being similarly secured to the pipe or tube 5a. As will be seen on reference Vto Figs 1 and 2 the end portions land la of being indicated at 7.' As vshown in Figs. 1

and2, for fitting vup or coupling together the ends of the several vsuperheater elements belonging to Ythe same horizontal row or rows of smoke tubes theflanges orplates A6, Y 62jA of the adjacentitransyerse tubular?V i members comprising the tubesand 5a, are

y lf()- and nuts to a correspondingflange-or yplatel brought*togetherfin:` a vertical plane landse-y l cured together by means ofbolts and` nuts',

for instance as illustratedjn'*Figure1440ithe drawings The iiange or plate main or vertical-header 3 is seciired'by bolts 8y providedon the outer endsh'of'two lsliojrtv tubular connections or projections 9,'19@ 301i vthefside'of the'main lor'-.vertioaljlieader 5 5; the tubularv connection 9 makingl* coiii'mu'nif1V ycation With tlie vsaturated steam chamberA of the header andthe-:tubular connection 9a making communication Ywith the superheated4 steam chamber of 'the'header As Willbe seen the construction-and arrangements are. `such that the fastening lnuts'ffor securingA the flanges or plates Gand 6i -appertainingi` to thej transverse tubularmembeisjof adja-i 'cent' superheater elements in the hoi'rirontal-V roW or rows of smoke tubes are Very easily accessible for manipulation both/for tighten ing up and thus 'securing the several elements in` therow or rowsfofsmoke tubes `together and for disconnecting theV said elements' should itfbenecessary to vWithdraw one ori V'more of the elementsr` Y n wiii be understood( theffeh lof um: pipes or tubes 5 andi ofthehereinbeforemen# j 'tioned transversely arrangedtub'ular memg-Vlr bers of the superheater-elements'is of across area suitably larger than-thecrossfarea of the pipev (ligand l? respectively) connected r5 andi 5, the saidy flanges or plaltes an'd': servingy for couplingiogetlier theqseveral.y superheater lelements yliauiiigg; U-lo'o-psfapper; I taining to afhorizontal` row orproWs offfthe l boiler smoke tubes. 1

4--'In 4thelconstruction Vthus far descr-:ibed"itl will be understoodV thatv each of the 'f U-loop superheater `elements jas a 'unit comprises the transversely arranged tubular members -consisting, intheembodiment illustrated, of 'the lengths of pipe'or tube 5v and-5% lia'vingoiil their opposite ends a ytlange'or-plate comrnoii'f to vthe adjacent'ends'OJthe two saidlpipes In Figf, 10 areholes through'tlie'ilaiige or plate-6" of'tlie transversely arranged tui known form in. vWhich tlieendlportions'ot the elements` Within tliejboiler uptake jfare:

bular member of 'a superheater eleinent5-'a similar arrangement ofathe boltzliolesbeingv provided in the` flanges or plates 11,-Fig-1 st indicates' the bolts with their-nuts 1 2.

Asshown in Figs. l and?,,certainfofthe supeilieater elements, i. e. the'V elements in the'boilerV vsmoke tubes situated farthest'fromv the vertical or niainheadersB5-'are o'a bent laterally'f'towards the lsaifdi'vertical or main header V3. the 'saturated-steainflinlet,and

fiof the transverse' tubular member of the superheater .element appertaining tothe smokeftubes nearest the? supeiliea'tedf steam outletje'en'ds vrof f each of tliesef elements beii'ig secured-in :a .pl-ate'lor l ineiitioiiedlplate'sor flangesgand 6?; the. saidilanges' orplateb being secured to tlie 'adjacentfii'aiige or platev 6,' appertaininggto the adjacent: element inl l-tlie ,rowy-by Y bolts; Y

landas yin?ft-liejcz'tse 0i? "the ii'aiigefplates 6 y y The superbe/aten elements appertai'niiig toiv fthe-1 V'boiler smoke tubes Ein" tliei kintermediate y or centrer nest- Oife-'suoli tubes may befofV some-l What 1 differentformVv or. constructionv from j f .those4 above s described. AFor#l1nstancethe superlieater elementsbelonging -to thefeen'tre* siinest .oboiler smoke tubes may#bearranged asshown'^infFigs. l 'and 2 infwliiclithe .n flanges or Aplates: faregprovidedfonthe lat'- Aerally bent-endsfoff `these' elements andthe said "angesfor plates; are secured by "bolts short. tubular connections to the verticali headen. i 1 1 Inf` the pfi'e-te'j-red embodimentzr according to: this invention; the main headers 3,3' comi o r 'header fand'. a superheated-l steam chamber or header preferablyarraiigedi'one *behindV the "other, consistl of lengths; of 1 simple standard steam'tubeofsuitable diameter'oroross x areain the side or- )iii opposite "sides of which tubes; openings -13`iand 14 of "suitable diamsof prising as'usuala saturatedz'steam chamber Y eter` or cross areal-are Vprovided they openings 1 13 communicating `fWitli the saturated steamV chamber :of the 'header' and' the*` openings :,142

cured in holes in tlie hereinbeforementioned flanges 8' for instanceby'beingxexpandedin i( `theSaid*flanges:ffii" "f Y v"The tweffpieoes. :ofV -tube' fyvliicli-` constitute the mainlieader `3 Withfits'saturated and superbe ated lsteaii'i, l chambers are i preferably secured;togetlierftlie 'onefbeliin'd the other byu meansfY of splitcollarsor' clamps 15l `be-l tween fthe flangesflA of which.` may. "beise-` v cured :the plates?` or,` brackets 16, 16" whereby f the main header is secured ini` position With-"v iii the boiler uptake, ltlie bracketor plate 16 being l secured to ythe Vboiler? tube plate T1 yand .thebracket or plate-.lti securedftofa .2 1 v1 o f suit-able part of or coiiiiected'iwitlithe structure J of the uptake; -1 The plates: 16 and" 16l may `be secured between the anges lc'of vi i the clamps 15 by rivets orbolts and Vnuts Y It desired tlie collars `Lor clamps 15j-may alsobe Weldediifto fthe-y tubes *forming fthe lieaderzif Each-not? the.- [tubes f'fo'rming, the

headeiv in the.f:embodiment-i-:illustratedv is i' cl'os'ed'fat its 'loWerl'end'by;` a :capor platel'lf'r'fVA which l-may: -be Welded tol; the tubes,l :and iat yThe hereinbefore mentioned tubular members comprising the transversely or horizontally arranged tubes 5 and 5V associated with vor forming part of each superheater element`Y or unit are preferably so arranged thatthe said'tubesfand `5rL liein the plane betweenlthe adjacent rows of smoke tubes ,to

' which the elements appertain.

If desiredthe end'portions or pipes 4,4 of the superheater elements, i. e. the portions which extend into ,the uptake or smoke-v box ofthe boiler, may be secured in the respective transverse pipes .or tubes 5y and 5SL byrbeing expanded in holes therein in any known or suitable manner.

If desired supporting means, forV instance vlugs or brackets, which might be secured to the boilerV tube plate 1 at the uptake or smoke box end of the boiler or to the platesy forming the walls or shell vof the uptake, may be provided for supporting the hereinbefore mentioned transverse tubes to which the ends loi the superheater elements are secured. t

l In analternative embodiment of the invention, suitable for application to a locomotive boiler, instead of the tubes 5, 5a with end flange connections 6, 6a and t-o which tubes the 'saturated steam inlet and outlet upper endisofsaidtubes 5, 5a to a flange ory end portions 4C, lfof the severalsuperheater elements are secured being arranged transversely or horizontally as hereinbefore de-V scribed andshown in the drawings, the said tubes 5, v5a may be arranged vertically, and the uppermosttube's 5, 5a appe-rtaining to the several elements in arow or rows 1t may be Y a vertical row or rows) of the boiler smoke tubes may be secured by the flange on the flanges on' the main header which in this l es case. may tbe arranged horizontally in the 1 upper part of the :smoke box above the group of boiler smoke tubes into which the super-n heater elements extend.

Although in the drawings, Fig. l, an arrangement of the 'superheater elements is shown in which each elementhas a number of JU-loops extendingfinto a corresponding number of smoke 'tubes in twoa-djacent rows of smoke tubes, the invention f is not restricted to this arrangement as elements whichhave a number' o-U-loops extending into the smoke tubes in-'onlyv one row of smoke tubes might be employed. Q The faces of the hereinbefore mentioned ianges or plates 6 and 6a on the'transverse tubular members onor Vconnected with the saturated steam inlet and superheatedsteam outlet ends of the superheater elements may be machined true so as Vto provide effective steam tight jointingcf theradjacent fianges 6 and 6a appertaining to the adjacent elements; if desired, however, a suitable jointmaking material might be provided between the adjacent faces of thesaid flanges 6 and 6a. Similar. provision wouldk of` course be made for the jointing of the flanges 6 of the elements situated nearest the main header 3 to theflanges 8 on kthe short Vprojecting tubes 9 and 9a on the-header. f

What I claim is Y 1 l. In apparatus of the classdescribed, the combinationof a flue sheet; a plurality kof parallel smoke-tubes secured to saidjsheet; a bi-chambered subsidiary header comprising a plurality of bi-chambered sections each section obstructing -access tov plurality of smoke-tubes;a1plurality 'of'tubw lar superheater elements the ends Vofeach velement being secured: respectively to the two chambers of a section, each .eleme'nt'ex-v tending into smoke-tubes obstructed byits section and lying entirely outsidek of allV Vsmoke-tubes obstructed by other lsections than the one Vto which it is secured; where-y by eachsection and its attached elementcan be removed without" disturbing 'any` other section.

2. In apparatus of the class described, .the

combination of a -fluesheet;ra plurality of parallel s1noketubes secured to said sheet; a subsidiary bi-'chamber-ed header compris.- ying a plurality of sections; each section composed of two parallel tubevlengths whose ends are secured into Vcommon flanges; said sections being separably secured to each other by means of said flangesgeach sectionk obstructing access toa plurality of smoke tubes; aatubularA s'uperheater element secured to each section, one endvto each tube length, 'and extending into smoke-tubes ob structed by such section; each element lying entirely outside of all smoke-tubes obstructed by other sections than the one to which it is secured; whereby eachV section and its attached element can be4 removed without disturbing any other section.

V3. In apparatus of the class described, the combination of a flue-sheet; a plurality of parallel smoke-tubes securedctosaid viiuesheet; a main bi-chainbered super-heater header parallel to theY fluefsheetV and out ofV line with the smoke-tubes;.a vplurality of subsidiary bi-chamberedV headers secu-red to saidy main header, each comprising a'pluraly ity of sect-ions, each section composed of separably secured to each other endto end, 90

their ends secured intofcomlnon flanges; eachsectionV obstructingfacce'ss to a plurality vof smoke-tubes; a,V tubular superheater element secured to each section, one end to each tube K length, and extendingy into smoke-tubes obstructed hy lsuchsection; each element lying 'entirely outside. pf v all rsmoke-tubes obstructedbytetherfnsectns than tliegone #30.10. 'which tis' secured; wherebyv each section andjits attached element-fcanf'be removed Without disturbing any other section or the main'heder. Y

In testimony whereof 'I alx myv Signal5 ture'ff' Y v ,Y v m n BERCY HAMILTON indicCK.'Y

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