US1735345A - Steam boiler - Google Patents

Description

Nov. 1 2, 1'929. w. H. wlNsLow 1,735,345

1 STEAM BOILER Y Filed Feb. 14, 1927 5 Sheets-Sheet 1 NOV. 12, 1929.-

H, wlNsLQw 1,735,345

STEAM BOILER Filed Feb. 14, 1927 3 Sheets-Sheet 2 Nov. 12, 1929. w, H, wlNsLoW STEAM BOILER 3 Sheets-Sheet 3 Filed Feb. 14, 192'/ Patented Nov. 12, 1929 eaS'feffflS PATENT eFH-CE mnuninmn, wmsLoW, oFcHIcAGo, ILLINois, AssIGNoRmo Geenen W. DULANY, ,111.,

or CHICAGO, l ILLINOIS STEAM Berman.k

Applicationled February 14, 1927. kSerial No. 168,016.

This inventi-oirrelates to high pressure steam"fboile'rs particularly useful for railway Ste'ain engines,iste ain rail cL 5., buses, tractors, meterlaunchesv andthe like, and is of the i typetliat is ymade up lof a number of sec tional units' which are 4a substantial duplicate .foflone another and which yare'readily remov ,able for replacement purposes. ""llieniainobjects of this invention are to piovidefau improved form of high pressure "boiler whiclrwill be exceptionally' free irom strains and stresses due to eiqansion of the generating tubes and connecting manijlolds; "to, provide ya [boiler 'which lwill Lhave Yhigh eiliv c'iency andexcellent,circulation;y and to provide aboil'ei of this class which is made up j; ol number of standardizedunits vor, sections wliichaie interchangeable and readily assembledf,"y 'l j "An illustrative embodiment ofthis in ventiony is shown in thelaccompanying drawings,

"iii'.wliicln-v v y Fig; 1 is a vertical, sectional elevation of Vthe improvedtype of boiler ,25j Fig."2 is Aan venlarged fragmentary section ytaken on thelline '2f-210i Fig. l; h

l {Fig/Bis an enlarged fragmentary section taken ontlie line ofFig. 1

Fig. l Ais an enlarged fragmentary detail,

3o `showing the generating'tuberibs which hold Athe. tub -is ,in spaced relation;

Figf is aneiilarged V'iifragnienti,ry `section of several generating tu'bes"sliowing their relative positions when assembled.

" Inlits general arrangement and also in the "details'of construction, this rboiler .isdesigiied toliperniit without injury the normal expansions'and contractions `due toy the tempera ,tures and temperature changes with which 40 it must contend, and also *when yused 'as a vlocomotive boiler to withstand the mechan* ,-vical shocks/or vibrations imparted thereto.

f Thesiirrounding housing oi' the boiler is pro- `videdwith an unobstructed floor covered with heaft` resisting material forreliecting radiant ikheat;upwardly 'into the* boiler tubes. yThese and vertically 'disposed loops; n

`Klhejlower, ends of the ytubes .communicate tubes are" arranged in two sets of overlapping 50.with staggered manifoldsextending vertilected vin substantially dry vided by the Athe 'boiler downcoinen nace and .conmiunicating @with superheaters vwhich are disposed inhorizon'tall'yextending groups of conduits iii-spacesiconveniently proaforesaid two setsfof looped tubes.

In the construction showninthe 1drawings `comprises a suitabley housing l which is provided vwith a smoke stack outlet away productsof combustiomand with :suitable burners i?)` and located adj acent the boti toin of thelhousing 1, for supplying fuel to the boiler.v :The :floor of the housing 1 is constructed' of f the usual Y.radiating .heat .ma-

terial 15, as y'is ,customary rin Athist-ype ofboiler construction. l il l Enclosedwith-in the fhousing 1, along two opposite sides thereof, are series of generating uiiits,eachof which ycomprises a vertically disposed, tubular, downcomer manifold `10, whichis provided with a plurality ofgenerating tubes 11 which communicate with the downcoiner adjacent thelowerportionfthereof and disposed at an anglefthereto. The generating tubes -11 are .positioned on the one above another, `and'lead outwardly and upwardly toward the opposite "opening `Q at @the :top thereof o'r carrying side 4of the 'boiler where the second series of unitsare positioned', the upper ends 'of the :generating tubes being-'bent back upon themselves `toward 'the downcomer '10 andy terminating in spaced relation-thereto,

The upper ends of fthegenerating tubes 11 are attached to, Vand communicate ywitlifa verticallyv disposedl tubular, intermediate,

separating upcomer ,mani-fold 15 which isA `supportecl by a'fstiut circulating generating tube 16 which is `mountedon,\andcommunicates with-'the down-comer manifold l0. vvThe manifold '15l acts as a separator for the steam V and water and is of greater cross sectional areay than the combined cross sectional areas of the generating tubes 11 which communicate therewith, and of less cross sectional area than the combined cross sectional areas of a series of separa-ting tubes 17 which provide communication between the manifold 15 and the upper portion of the downcoiner manifold 10. A suitable insulating wall 18 is provided for shielding the separating tubes from direct heat and extends from the lower end Vof the manifold 15 along the supporting strut 16 on` the rear side thereof to the downcomer 10.

The lower portions of the generating tubes 11 are oll'set or staggered with relation to one another, as shown particularly in Fig. 3 of the drawings, so as to present'as great a number as possible of the tubes to the direct heat from the burners and the radiating surface of the boiler, the points of bending of the tubes being in a vertical plane, as shown at 19, extending down to a point closely adjacent to the lower portion of the downcoiner manifold iny order that the units may be assembled by raising in a vertical direction for replacement purposes.

The boiler sections or units are mounted in staggered relation to one another so as to secure compactness on a mud drum 2O which extends along one side of the boiler, and the second series which extend along the opposite side of the boiler are mounted in the same manner and the two mud drums are connected together as shown at 21 rfor equalizing purposes. A lire wall 22 surrounds and protects the mud drums and the connection fittings on the lower end of the downcomers from directheat from the burners of the boiler. The units comprising each series are assembled with their generating pipes, and in spaced parallel relation to one another, and the two series are so positioned that the generating pipes extend toward, and overlap, ther generating tubes of the opposite series, the tubes of one series alternating with the tubes of the opposite series and the adjacent sides of the generating tubes at the point of overlapping areyeach arovided with ribs 25 placed diametrically oppositefeach other for holding vthe tubes in spaced relation, these ribs being of such thickness as to entirely fill the normal spaces between the tubes when the boiler sections are assembled each other in such manner that a suitable tieand closely abut against rod (not shown) can be used to clamp the entire assembly of tubes snugly together. rlhese separating ribs 25 also provide a bale for the products of combustion in the fire boX of the boiler which is located substantially midway between the burner flames andthe smoke stack 2. n

The upper ends of all the manifolds of each series of boiler sections are connected by suitable pipes and fittings 30 to a common transverse steam header 31 and the headers 31 are each connected to a bank of superheating coils 32 which are enclosed in the space surrounded by the generating tubes, separating tubes and manifolds. In this manner the baffles formed by the ribs on the adjacent sides of the generating tubes tend to deflect the gases and products of combustion outwardly against these banks of superheating tubes in very efficient manner.

A bank of preheating coils 35 which may be used for either air or water, is placed above the generating tubes in such manner as to receive heat from the products of combus tion just before leaving the boiler.

The water is supplied to the boiler by any suitablefmeans (not shown) through pipes which are placed concentrically in the mud drums 20, these pipes being provided with a. series of short nipples 41, one nipple being provided for each downcomer manifold, and extending upwardly adj acentl the lower end thereof so that water is supplied in equal quantity toeach of the boiler sections. The nipples l1 are of sutliciently small diameter, relative to the connections used for mounting the downcomer manifolds, that water from the manifolds can pass around the out-er sides thereof into the mud drum, and equalization between the sections is thus secured.

ln the operation of the boiler it is filled through the pipes 40 and the mud drums 2O and fuel is supplied through the burners 3 and Il. llfhen the generating tubes 11 be.

come heated and steam generated therein the water and steam travel upwardly in tubes into the intermediate manifolds 15 wherein a partial separation of the steam and water takes place. Steam passes through the upper separating tubes y17 to the upper portion of trie downcomer manifold 10 and the water returns through the lower separating tubes of the series.

VThe relative cross-sectional areas of the separating tubes 17, separator manifold 15, and generator tubes 11 communicating therewith is so proportioned that a free and ef ficient circulation is maintained at all times without a reversal of circulation taking place therein. The steam passes out through the connections 30 on the tops of the downcomer manifolds 10. thence into the steam headers 31. From there the steam travels to the superheating tubes 32 and thence to the engine or other appliance to which it is desired to supply steam.

rlhe separating or spacing ribs 25 which are on adjacent sides of the overlapping portions of the generating tubes 11 take up the rubbing or chafing action of the tubes due to vibration and relative shifting of the tubes and prevent the adjacent side walls from becoming` rubbed thin and thus weakcned. Qrdinarily, in a boiler of this kind, regardless of the precision and accuracy wit Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous modifications may be made without departing from the s iirit of this invention, as defined by the following claims.

I claim: n

l. A boiler construction of the class described comprising an upright tubular downcomer manifold, generating tubes communieating with said manifold adjacent the lower portion thereof and inclined at an angle thereto, the upper ends of said tubes being bent back upon themselves towards said manifold, and posed tubular separating manifold communicating with the upper ends of'said generating tubes, and means providing communication for water and steam from said separating manifold to the upper por-` tion of said downcomer manifold.

2. A boiler of the class described comprising an upright tubular downcomer manifold, generating tubes having their lower ends communicating with said manifold adjacent the lower portion thereof, said ytubes being inclined at an angle to said manifold, the

upper ends of said tubes being bent back.

upon themselves towards said manifold, an upright tubular intermediate separating manifold communicating with the upper ends of said tubes, and a series of separating tubes providing communication between said separating manifold and the upper portion of said downcomer manifold.

3. A boiler 0f the class described comprising an upright tubular downcomer manifold, generating tubes having their lowerends communicating with said manifold adJacent the lower portion thereof, said tubes being inclined at an angle to said manifold, the

upper ends of said tubes b eing bent back upon themselves towards said inanifold, an upright 'tubular intermediate separating manifold communicating with the upper ends of said tubes, a series of separating tubes providing communication between saidseparating manifold and the upper portionof said downcomer manifold and means on rs aid downcomer for supporting said separating manifold. l

4. A boiler of the class described comprising an upright tubular downcomer manifold, generating tubes having their lower ends communicating with said manifold adiaoent the lower portion thereof, said tubes being inf clined at an angle to said manifold, the upper ends of said tubes being bent back upontheinintermediate vertically dis-y `tubes being provided with selves towards said manifold, an upright tubular intermediate separating manifold communicating with the upper ends of said tubes, a series of separating tubes providing communication between said separating manifold and the upper portion of said downcomer manifold, and a strut generating tube mounted on and communicating with said downcomer manifold for supporting said separating manifold.

5. A boiler of the class described comprising an upright tubular downcomer manifold,

' generating tubes having their lower ends communicating with said manifold adjacent the lower portion thereof, said tubes being inclined at an angle to said manifold, the upper ends of said tubes being bent back upon themselves towards said manifold, an'upright tubular intermediate separatingr manifold communicating with the upper ends of said tubes, a series of separating tubes providing communication between said separating manifold and the upper portion of said downcomer manifold, and a heat insulating wall extending from said separating manifold to said downcomer manifold for shielding said separating tubes from direct radiation.

6. A boiler comprising two units each of which comprises an upright tubular downcomer manifold,a series of generating tubes having their lower ends communicating with said downcomer manifold adjacent the lower portion thereof, said tubes being arranged one above another and inclined at an angle to said manifold, an upright tubular intermediate separating manifold communicating with'the upper ends of said generating tubes and a series of tubes providing communication between said separator manifold and the upper portion of said downcomer manifold, said units being arranged in two spaced seiies with the generating tubes of each series extending toward and overlapping the generating tubes of the opposite series, and the adjacent sides of the overlapping generating chafing ribs for holding the ytubes in spaced relation to each other. f

f Signed at Honolulu this 31st day of J anuary, 1927.

WILLIAM H. WIN SLOW.

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