US1820296A - Locomotive boiler - Google Patents

Description

' 1931. c. E. BROOKS LOCOMOTIVE BOILER Filed Nov. 21, 1929 2 Sheets-Sheet l INVENIOR CHARLES-E. BROOKS Mm \auyk T6 ATTOILNEYS C. E. BROOKS LOCOMOTIVE BOILER Aug. 25, 1931.

2 Sheets-Sheet 2 Filed Nov. 21. 1929 5 INVENTOR cnamzsjaanocms wazz mwlw tm ATTORNEYS 7 mm mm 3 mm 3 up B I rangement .of the 'dry 'pipe r practically elimi- Patented Au 25, T1931;

T s nven dnl e c rtain imp 1 come eb le s I The inventlon 1s; concerned,part cularly,

1 In such a v enters the, steam ;dry pipe, -Q fi lb il li large ,opening,placing the 'steam dome 1n i f Q Qr n t pmy n n n,

with boilers of the: type heretofore provided w'th a steam dome and an inside dry; pipe. boiler, a certain amount oi; water due-to the surg water and to the: relatively communication with the: boiler steam space. V a

' section of theboiler'shell cut away for-its aparedwithithat required for V v ome construction. 'The dis; ,tribution oftthe steam Outlet from the boiler if: m ngp urali y v qp nings f. s

The scale, and other v foreign matter entrained by the water entering the dry pipe: is carried to 1 the super-heater; and to the engine cyl1n er d s flie cause 1 m s m e u the forfexampleyas v blowing out of cylinder heads: 7 The internal arrangement of the dry 7 pipe is; alsola d's'ad antage-in that itconstltutes anobstruction".in the space between the 7 v I I hectop of -the boiler.

The object of the present invention 1s to nd to provideimpro'ved.means for collect-v and conveying steam from theboiler. I an outside: dry

ing.

pipe is) mounted ,to extend longitudinally ttendee, y r a V spaces communicating with gayplurality'of relatively small jopeningsr formed, pre'ferabove the "to 1 oflthefboiler;v T he dry pipe is one or 1 more enclosed steam a y; i 1t eu o t pe t pn Qf eb.i r- Thefdry pipe'is. provided? with a multiplicity space or spaces; This front endlthrottle locomotives and the steam P s s om-th boi e hr t dry P pe- "tothel, super heater header: andfront end. throttl e box assembly 'A stea'm shut-offvalve isjarrangedin theexternal'dry pipe to afford a means of. cutting ofi' theflow of steam frointh-e boilertolpermit of repairs orex amlnations being effected with respect to the throttle valve or super-heater header; while theengine is under. steam. The external arnates the entrance. of: water particles .due to thesurging of thelboiler water. The plurali 'escapeof steam are located near the centre of omma Donna beg substantially separate eliminate the steam-dome and inside dry pipe 7 relatively: smallgapertures placing the interior. of said pipein' c ommunication with the surroundinglenclosed arrangement }is part1cularlyadapted for fennnilnsianooxs, non inear; UEB C, canami I ,oscillationofhthe' b ner amt-tn lare iliely atively small mama so that; the steam'flow is I a distributedover alarger extent of'watersurh QSS. 'sect'onal.

considerably greater than openinghereto ore provided'ior placing the steam dome in communication withthe boiler steam space.

fore, enables a considerable reduetion in the plie ti m as com the usual steam;

Thenew arrangement, there- 2 ameter greatly reduces the tendency of the I boiler" water to lift and enterl the dry @pjp Moisture carried S into the F enclosed I steam 1 I space or spaces surroundin A l m'i hei te m of the latter through the rel} during passage densate collecting chambers from which the" in that it leaves clear the space; above the fir t es; t e e y c a (the a a lab e I steam storage space ofthefboiler and permit: ytl'ng freer access to the interior of thefboiler through suitable [unobstructed manhole which may be providedfin the topj'of the boil'-, er;v shell. Theftotal area of 1 the openings the dry, pipe will I vatively small perforations former 11in the wall .1 r f id i g.wTh enclosedjsteam space or formed in the boiler, incl dug the manhole I a and thesteam outlet openings referred to, is I I less thanthe area of opening required in,con-{ '1 nection with the customary steam dome. in;

stallation; Proceeding now the accompanyingdrawings,-.in=which I rFlglllfll 1s a view in s de elevation showing the. general 1 appearance 0f] a locomotive a in equipped with my-inventionin place-ofth'e' customary steam dome andj'inside dry pipe;

arrangement. r I F1gure'2 lsfa -long1tud1nal sectional View I to a moredetailed v sion of the invention, referencewill'behadto of saddles 15. metal tube 16 provided with bottom openings e invention is illustrated in F igures" 1 and 2. In

these figures, l1 designates a boiler provided 'with'a plurality of relatively small openings "12 communicating with steam passages 13 formed in the base portions 14 of a plurality These saddles carry a seamless 16aregistering with the steam passages 13.

The enternaldry pipe indicated at 17 passes through the tube 16 and has its rear terminal attached to and suitably supported by the rearmost saddle 15. The forward end of tube 16is swaged into engagement with pipe17 as indicated at 18. The dry pipe is of smaller diameter thanthetube 16, so thatthe latter forms an enclosed steam space 19 surroundin the dry pipe and communicating therewi h through the medium of'a plurality of relatively small apertures '20 formed in the upper half of said pipe. The rearmost saddle 15is' provided with a cover 21 to permit attachment of the dry pipe'to said saddleand to facilitate inspection and cleaning of the pipe. The forward end of dry "pipe 17 is connected, by expansion joint'22 and valve casing 23, to the super-heater header and front end throttle box assembly generally designated refierence character 24. 'Ashut-oif "valve 25 of any suitable type is arranged in the valve casing 23 so that the flow of steam from the boiler may be interrupted whenever it is desired to inspect or repair the throttle valve or super-heater header whilethe engine is under steam. A manhole 26, provided with a suitable cover 27, is formed in the boiler ad ja cent the rearmost saddle 15 so as to afford access'to thefclear space provided in-the boiler above the fire tubes. Ample facilities for inspection and cleaning are provided by openings 28 formed inthe saddles 15 and in the Valve casing 23, it being understood that these openings are normally closed bysuitable plugs.

In the arrangement above described, the steam passes from the boiler into the enclosed steam space 19providedbetweenjthe tube 16 and" the dry pipe 17. From this space the steam passesinto the interior of the dry pipe through the apertures 20. As these apertures 20 are formed only half of the steam pipe, the lower half of the in the upper pipe serves to baflie the flow of the steam and to provide a condensate collecting surface,

from which the condensate drops to the bottom portion of the tube 16 and returns to the boiler through the passages 13. A further separation of moisture from the steam is of fected, as the steam passes through the relativel small openings 20 into the interior of the ry pipe and this moisture accumulating around the edges of the apertures 20 finds its way to the bottom of the tube 16 and is also returned to the boiler through the passages 13. Any condensate accumulating within the dry pipe 17 is permitted to escape therefrom through the openings 29 formed in the lower portion of said pipe.

The dry pipe 17 is eccentrically arranged within the tube 16 so that a somewhat greater clearance is secured between the lower portionsot thepipe and tube to provide a condensatecollecting chamber of considerable Volume! In order to further bafile the tendency of the boiler water to surge into the passages leading to the external dry pipe, I may provide a perforated plate 31 having its body portion spaced from the top of the boiler shell directly below the openings and passages placing theboiler in communication with the external dry pipe. The side edges of plate 31 are flanged downwardly as at 321 and bolted or otherwise secured to angles 33 which are fastened to the'upper portion of the boiler shell. The ends of the plate 31 are turned upwardly intoengagement with the boiler shell, as indicated at 34.

In the modification disclosed in Figure 3, the external dry pipe comprises a rear section 17a and a front section 17 b. The rear section 17a is of greater diameter than the front section and ismounted directly in the saddles 15a. These saddles are provided with internal channels 156 affording enclosed steam spaces surrounding the pipe section 17a and communicating with the boiler through openings 12a and 130, corresponding to the openings 12 and 13 described in connection with Figure 2.. The enclosedsteam spaces 15?) communicate with pipe section 17o through the medium of relatively small openings 20a formed in the section surrounded by saidenclosed spaces. Thor-car end of pipe section 17 b is received in the front end of pipe section 1742, the latter being reduced in diameter by a swaging indicated at 17c. the two pipe sections is such that the bottom of, the pipe section 176 is in a higher plane than the bottom of the pipe section 17a, so that the lower portion ofthe section 17a portions of the pipe The manner of connecting serves as a sum or condensate collectin 2D the steam passes provided Condensate precipitated within-the pipe sections 170; and 17 b finds its'way back to the boiler through the apertures 206; when the throttle is eased down.

As shown to advantage in Figure 1, the external dry pipe assembly is enclosed by a suitable jacket 36 bolted orotherwise fastened to the top of the boiler she'll. also be understood that thedry pipe assembly will, in actual practice, be completely coveredby substantial lagging. 1

Having hus fully described my it will be understood that various changes in the construction and arrangement of parts may be resorted to within-the scope of the appended claims.

Having thus described myinvention, what I I claim is: g

1. A locomotive boiler having a plurality of openings in the top wall thereof, a plu rality of saddles mounted on the boiler and hand. 3

invention,

with bottom openings communlcatinterior of the pipe in communication with said enclosed space. V V

3. A locomotive boiler equipped with an external drypipe replacing the customary steam dome and insidedry'pipe installation,

supportingsaddles surrounding'the dry pipe andjmountedon the top of the boiler, said saddles being recessed toprovide enclosed steam spaces around the dry pipe, and steam passages placing said enclosed steam'spaces in communication'with the boiler and with the interior of the dry pipe.

, In witness whereof, I have hereunto set my CHARLES BROOKS.

It will ing with-said boiler openings, said saddles also having openings extending therethrough in the longitudinal direction of the boiler, an external dry pipe supported to extend through the last mentioned openings of the saddles and one or more enclosed'steam spaces surrounding said pipe and communicating with the bottom openings of the saddles, said dry pipe being provided withopenings placing the interior of the pipe in communication with said enclosed steam space or spaces.

2. A locomotive boiler equiped with'an A external edry pipe replacing. the customary steam dome and inside dry pipe installation, a tube surrounding a portion of the dry pipe and spaced therefrom to provide an intervening steam space, one end of said tube be- 7 ing directed inwardly into engagement with I: the dry pipe to close the corresponding end 7 of the steam space,a plurality of saddles having base portions secured to the top of the boiler and apertured body portions surrounding and supporting said tube, one offormed to close the re-- maining end of said steam space and the base 7 said saddles being portions of said saddles being provided with steam passages placing the interior of the v boiler in communication with the enclosed steam space between the dry pipe and tube,

said dry pipe having apertures placing the

Images