US1630400A - Feed-water heater arrangement - Google Patents

Description

May 31,1927.- 1,630,400-

N. 'r. M KEE FEED WATER HEATER ARRANGEMENT Filed Sept. 3 1925 '2 Sheets-Sheet 1 finli/i'msle I7: #55

I I N V EN TOR.

rron/Ev.

v .1 the. operation of such t e "-particularly at times when there 1s no ex NEAnTRIMBLE MoKEE,' onnnonxvrnnn, NEW roan, assron'on ref turn i HEATERCOMPANY, or new YORK, iv.'Y.- a

i FEED-WATER I IEATE'R ARRA GEMEN'rQ I ."by exhaust'steam, andjit has forits purpose of an arrangement by which t e Pr vis devices is improved haust steam available,

Z My invention is panying two sheets of drawings in which Fig.1 shows alocomotive equipped With an exhaust steaml feed water. heater .With' my improvement applled to. it; Fig. 2 shows on an enlarged scale a longitudinal section of an element in the arrangement; "and Fig. 3

' '15 shows a, modification of the element shown inFig, 2.

steam feed Water heater and the related parts is not modified When my invention is used, but may be of the ordinary or any preferred type. The, illustrated form shownfin Fig. 1 may be briefly described as follows Thebody of the locomotive is designated I by the numeral 1. The exhaust-steam feed Water heater 2 is shown in an elevated pos1.-

which the Water to be heated and thesteam' not mingle; But Will be heating it do readily seen that this-invention visequally applicable to does occur.

Exhaust s team is carriedfronr the base of the exhaust nozzle by means of pipe 3' to the heater. fotlby means of pipe igand returns toythe feed line 5by means'of connection 5 leaves the feed heater and is fed to the locomotive boiler through pipeQi-B and boiler check 9. The pump 6 receives steam to oping 26 at the right end of bore 23. This'is erate 'it through, pipe 10 from the steam also carried to the feed Vivater heater through pipe 12.

'. There' are other steam driven auxiliaries Application filed mama 30,1925. ser l no. 59,505

, The general disposition of the exhaust heaters in vhich such mingling The resulting condensate is carried Na ter to be heated in the heater reaches pump I v WVhlClrji'fiClPliOCitU-BS plStOIl 24. This piston ,abuts against theend of stem 20. Pipey l l through'pipe 7 to the'feed Water heater. It

is arranged to communicate with. the leftend -turret 11. The exh aust from the pump is leak pastpiston'QL,

is amass to the reeawar heai.

and the eXhaust Steam leaves by p1pe' 32,"

The arrangement so far described isnot representative of this class Ithereis shown n the draw ng the air pump 30. Steam i01- driving it reachesfit through. pipe 31,

novel. One difiiculty eXperiencedWith itis I v that when lthelocomotive throttle is shut ofi, and there is therefore noexhauststeam"which could reach the heater throughlpipe 3, the water forced by the pump through the heater will not receive any heatginthe heater but by boiler men.

I am aware that means-have been sug V g'ested in the pastj for obviating this difficulty. In fact, my oWn United States a'pplication atfififltfl, dated June 1-16, 1925 proposes one Way of remedying it; Thepresent invention has the same purpose invievv,c b ut does it by other means. i I

i I carry the live steam operating thepunip 7 t -om pipe 10 through'a-n automatic valve13. I i This automatic valve has a connecting'pipe 3 14 leading-i. from it to the steam. pipe 15 which steam pipe delivers steam to the main engine. The details of valve, 13 are' more clearly illustrated. in Fig.2. Pipe fl O connects to thev alve at'16, and steam-passing from the valve to the {pump leaves ll-he passage 18 from 16 ;to 17 is controlled" y meansof'a valve19, This valve has. a cylindrical stem 20 reciprocatingin a 'cylin- .drical bore in partition; 21. "Thereisfasmall hole 22 in the valve byivhicha' small'quanas in the figure.

as'viewed in the figure of the bore 23Q A drain pipe 25 1s screwed into theopento allow; any" steam to escape which may;

' tity of s eam lean-pass from inletnl6 to outlet'i 17; when the valve is i'n itsclosed position, H

hen the engineeropens the main th'rottle 1 and there is steam pressure in pipe ,15', a similar pressure Will also eXist' at .theleft side of piston24af llheiarea of this piston 0 e which, delivers it to pipe '12; tofjoin any I exhaust issuing from the Water pump. lu'strated in the accom y will pass onto the boiler "in 'a cold staterflm" lllllis bj tionabl eifls is Welleundetstbod I 7 being larger'than the area of valve 19,. the piston will move towardsthe right and open valve 19. This position will-be mamt'amed as long as steam pressure above a certain 7 point, exists in pipe 15.

i ihen'the throttle is closed, the pressure in 15 drops rapidly below the pressure requiredto hold the piston 24 inqits position:

to the right and the live steam passing through pipelO and from 16 to 17 will carry valve ilt) 'to'ward the left and will seatity, a It willj'now'be apparent that as long as there is steam "in or in other words as '15 long as there is'exhaust steam to heatthe feed water; valve 19 will be open and the pump 6 will operate at full capacity; I/Vhen the throttle is closed and the pressure in 15 falls, or in other words when there is no 1 exhaust steam to heat the feed water, valve "19-wi1l close, The; leakage through 22, howfever, is sufliciont tokeep the pump moving- 0 sl10cks. "I make the opening 22 of such sizethat the pump will keep moving, bLltlNVlll not force intothe boiler water in objectionable quantities.

The small amount actually/delivered is as" a matter-of fact; heated s'ufiiciently by "exhaust steam from one or another 0f the constantly operating auxiliaries exhausting into the heater, as a representative of which the air pump has been mentioned above. 5 0 One or more of these auxiliariesare almost ,c'erta'in to be furnishing exhaust steam at such times. i i

1. th pen engineer and, the resultant openingof valve 19, tlie'increase in speedof thepump stroke to "full 'ca acit'y fis smooth and "unaccom- -panie d by any shocks or' jars.

'Iu' Fig. 3jis shown a variation of the valve' fofFig. 2, the variationconsisting in theffact that this valve can be positively opened by manual means when desired, be-

mg otherwise automatically operated just the one of Fig. 2.

y The valve 19. herehas'a projecting stem 4:0 with an enlarged head 11. A yoke 42 engages this head in such a manner, as to I leave enough play forthe automatic operation ,of the valve during normal periods. The yoke iscarried by a stem 43 which is in threaded engagement with the cover 44 and which extends through the cover and has means 45 on its outer end for manual.

operation. In the position illustrated'the yoke permits the automatic operation. A

1. Stop 16 prevents the yoke from being screwed in too far. and preventing the'automatic function. The object ofthis arrange mentis to make it possible: to open valve 19 manually at times when there is nost-eam in the steam pipe 15,'andwhen it may for some reasonbecome desirable to work the pump This islaccomplishedby screwing out stem 4-.3 untll the yoke 42 engages the head 41 and moves valve 19 off its seat. vVhatI claim'isz w 1. In a. locomotive the combination ofjan exhaust steam, feedheater, a pipe l Sllpplyr, mg exhaust steam from the mam engine to 1t, a pipe supplying feedwater tofit', a pipe carrying feedwater from it to the "boilerf'a;

pump sup plying'waterlto said second named pipe, a pipe supplying steampto the pump,- v

a steam pipe supplying live steam to the mam eng ne, and a valve in the pump steam pipe responsive to pressure conditions in,

the main engine steam pipe to open when the: pressure is above a certain pointfand to close when it 13 below such] P011113."

2. In a locomotive the combination of an exhaust steam, feed-heater, a pipef'supply mg exhaust steam from the mam engineto" 1t, a pipe supplying feedwater to t, "a plpe' carrying feedwater from it to the boiler,'a pump supplying water to said second named pipe, a pipe supplying steam to the pump, asteau'i pipe supplying live steam to the main engine, and a valve in the pump steam the main engine steam pipe'to open when being provided a small leakagefrom one .side of the valve to'th-e other when seated, .whereby the pump is kept moving slowly 'w5 h in alocomotive the combinationof an p 7 ex auststeam feed-heater i e s u l of the throttle by the i p Pp y when the valve is closed.

ing exhaust steamfromthe mam engine pipe responsive, to pressure conditions in ice to it, a pipe supplying feed-water to; it, at

pipef carrying 'ifeedwater y from fit} to the boiler, a pump supplying water to said-secsteam to the main engine, avalve in 'the pump steam pipe responsive to the pressure conditions m. the main engine "steam pipeto open when the"pressure is above a certain po nt and to close when it is below such I ond named pipe, a 'pipe'supplying steam to 1 the 'pump,fl-a steam pipe; supplying live j sure conditions in the main engine steam pipe. i

4. In a locomotive, the combination of an exhaust. steam feed-heater, a'pipe sup plying exhaust steam from the main engine to it, a'pipe supplyingfeedwater to it, a plp-e carrying feedwater from it'to' the boiler, a pump supplying water to said second named pipe, a pipe supplying steam to the;

pump, a'steam' pipe supplying live steam ing provided a small: leakage from oh'e iside" 'of" th8 ';V&1VB to the] other when -seateit he-pump is kept mOYi 'g- SIQ IyTM whereby when the valve is qlo sed.

' NEAL ,TBIMBLE

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