US1888016A - Boiler feeding device - Google Patents

Description

Nw. 1s, 1,932. K. REZSNY 1,888,016

I BGILER FEEDINGDEVICE Filed Oct. 29, 1929 5 Sheets-Sheet 1 5f, MM@ 91%@ "ovfi, 1932.

K. REZSNY BOILER FEEDING DEVICE Filed Oct.- 29, 1929 3 Sheets-Sheet 2 Nov. 15, 1932. K, REzsNY 1,888,016

BOILER FEEDING DEVICE I 4 Filed oct. 29. 192s s sheets-sheet 3 l 1 im u.

Puente-a Nev. is, iesfz XOLOMAN BEZSNY, Ol' BUDAEST, HUNGARY, ASSIGNOB TO BBESIAU fr; orrlca HYDBOmER A. G., 0l'

norman summe avion Application llled otaber 29, 1929, Serial' No.

The present invention relates to boiler feeding devices. t

In boiler feedingdevices, more articularly for locomotives, for instance in ex aust steam injectors, automatic starters are already known. The hitherto used starters of this kind are however built into the exhaust steam injectors themselves, owing towhich the construction of the .latter isrendered lcomplicated and their maintenance diicult. These disadvantages are remedied by the invention, a further advantage of which is that the exhaust steam can only pass into the injector when the latter is vworking as an ordinary injector, that is to say, the exhaust steam injector i's first started with cold water before exhaust steam `is admitted. which ensures a reliable starting even at high outside temperatures. A further characteristic feature ofthe invention is the special construction of the vexhaust vsteam injector.

In the accompanying drawings two constructional forms of the invention are shown by way of examples. Y

Figure l shows the arrangement of the starter and of the exhaust steam injector on a locomotive.

Figure 2 is a longitudinal section through the starter,

Figure 3 a longitudinal section through the exhaust steam injector.

Figure 4 is a section 0n the line A-A oi Figure 3.

Figure 5 is aside view of another constructional form of the invention. A

Figure 6 is a top view ofthe same constructional form.

Figure 7 is a longitudinal section.

Figure 8 is a longitudinal section on the line B-B` of Figure 5 after that the nozzles have been removed. v

From the exhaust pipe 1 of the steam cylinders of the locomotive a connection pipe 2 is carried to the starter 3, and the exhaust steam passes from the latter through a pipe 5 to the exhaust steam injector 6 into which the feed water is let through the connection pipe 7 from the water space 8 of the tender, the quantity of which feed water may be regulated by means of the 408,348, and viiaitermany November 5, 18218.

handle"9. The feed water flows from the -l passes at raised velocity'and raised tempera-A ture into a chamber 37 in which a temperature of 50-70 C. and a Vpressure of 3-5 fatmospheres is attained. From this chamber' the water ilows into the up er part of the 'exhause steam injector. T is comprises a live steam nozzle 24, a mixing nozzle 25 and a delivery nozzle 26. The live steam is conducted to the live steam nozzle 24 through the live steam valve 10 and the live steam pipe' 11'. The mixing nozzle 25 is surrounded by the overflow chamber 27, which is shut o' from the overflow pipe 13 by the automatic overflow valve 28. The overflow water passes through the overflow pipe 13 into the return pipe 14 of the tender. This pipe is preferably `carried through the water space of the Sil - The starter is connected by means of a small steam pipe 15 to the steam space of the slide valve chest or to the steam admission pipe, and also b va second small pipe 16, to the live steam pipe 11.

yThe starter 3 comprises (Figure 2) two identical casings 17 and 17a, in each of which there is a valve 18 or 13a on a seat 19 or 19a. ln the said casings are mounted cylinders 20 and 20a to which lead the pipes 15, 16. The cylinder 20 is therefore in connection with the steam admission pipe or with the admission chamber ofthe slide valve chest, and the cylinder 20a with the live steam pipe 11. The last mentioned cylturn pipe 14 back into the tender.

inder may however instead of being connected to the pipe 11 be in connection with the delivery chamber of the injector. In the `said cylinders pistons 21, 21a are arranged by means of which the valves 18, 18a are opened, which normally are kept closed by pressure springs 22, 22a mountedon the valve rod.

The injector operates in the following manner;

As the return pipe 14 opens at the top above the water level in the tender, the casinalr of the exhaust steam injector is always filled through the connection pipe 7 with the cold water which fills the exhaust steam pipe 5 also 'up to the starter 3. When the looomotive is running without steam or is standing still and is to be fed, the live steam valve 1G is opened, whereupon a pressure is pro`I duced in the exhaust steam injector, which closes the water valve 35 and opens the overlow valve 28. rl`he live steam forces therefore the water from the overflow chamber 27 through the overiow pipe 13 and the re- A. slight vacuum is then produced, and fresh water will flow in through the water valve 35. The. injector starts and works as an ordinary in jector. In the live steam pipe 11 there will now be substantially the full boiler pressure, so that the valve 18a in the starter will he opened. As however there is as yet no pressure the cylinders or in the steam admission pipe, the valve 18 will remain closed, and the starter 3 will shut off the connection between the exhaust pipe 1 and thc exhaust steam injector 6. No air will be therefore able to pass into the injector.

When the locomotive is running under steam, and it is desired to do the feeding, the exhaust steam injector is again started working by a single operation by means of the live steam valve 10. The valve 18 of the starter will be opened by the steam pressure in the slide valve chest or in the steam admission pipe and the valve 18a will be opened by the pressure inthe live steam pipe 11. The exhaust steam will then be able to pass into the bottom part of the exhaust steam injecl tor through the exhaust steam nozzle 31 and will become mixed with the cold feed water so that the water will be highly preheated'before it passes intothe upper part of the injector. When working with exhaust steam, the` feed water passes into the chamber 37 not only highly preheated, brut also with a considerable pressure owing to the delivery nozzle 32, so that the live steam valve l0 must be correspondingly throttled, immediatelv after the starting.

The arrangement of the valves '18, 18a is such that great changes of direction are l-produced in the exhaust' steam, owing: to

which oil, water, dirt, etc'. will be separated in the bottom part of the casings 17. 171i,

23a. Into these cocks' also automatic water y outlet devices may be built.

The described arrangement of the overi flow tube V13 and the pipe 14 has three advantages:

(a) The hitherto wasted quantity of overflow water is saved, and the quantity of heat hitherto lost with the overow water, is recuperated. This quantity is considerably more particularly when the injector is working' in an unreliable manner.

(b) The water valve 35 may be always' open with a correspondingly adjusted lift, which greatly facilitates the work of the engine crew' as only 'the live steam valve 10 has to be operated.

(c) There is always leftin the pipe 14, 13 a water column which closes and loads overflow valve 28, so .that the pressure in the overflow chamber may be greater than the Y atmospheric pressure. rlfhe feed water may therefore have in the mixing nozzle 25 a considerably higher temperature than in the ordinary injectors, owing to which the exhaust steam can prehr` at the feed water to a higher temperature, more particularly as the feed water passes into the chamber 37 with a con siderable pressure.

The working of the overflow pipe 14 is independent of the special construction of the exhaust steam injector, that is to say may be used for instance, also in ordinary injectors.

As indicated in Figures 5-8 a plurality of exhaust steam injectors of the kind described above, may be combined in a simple and ellicient manner. According to prescriptions given by the authorities locomotives must be equipped with two separate and independent tively or any desired number may be employed. If for instance a set of three injectors a, 7) and c of different etects are used 'seven different Aworking relations (a, b, o; a-bg (1 -c; bc; a-b-c) and control possibilities'are obtained in accordance with the boiler yield at a given time. The rules are complied with when the arrangement is so dimensioned, that two injectors in combinatino are able to cover the entire water consumption of the boiler. If one ejector should be damaged. the remaining pair will always be able to supply the necessary feed water.

On account .of the combination of a pluraliis ity of injectors, all injectors may without dif-` ficulty be driveneconomica-lly by means of exhaust steam. The safetypf -working is increased, because all injectors are ke t in operation. -Even when only a single vinjector is in use the entire set will be maintained at a raised temperature and the water will v be kept moving, whereby the danger of freezing is minimized.

n the casing 41 .for instance three live steam injectors 42 (Fig. 7) of different effects may be arranged independently of each other and side by side in chambers 43-45 (FigL 8) and in the lower chambers 47-49 three exhaust injectors maybe located. The live steam from the boiler does not as shown in Figure 1 pass through a single live steam, valve and aV single pipe 11 'but flows f v handle, in order to regulate the quantity .of

feeding water to be delivered.

In each of the nozzles 31 of'the exhaust. steam injectors, is a threaded spindle 50, the nozzle end of'which is equipped with a. substantially conical body (pear) 51, which may be displaced by rotating the spindle. By means of this simple mechanism it is possible to alter the free cross-sectional area of the exhaust-steam .nozzle 31 and therebyto regulate the quantity of the exhaust steam. The exhaust steam pipe 5 connecting the engine of the locomotive with the feeding device is widened adjacent the injector casing 41 and in this widened art 52 three nde` 'pendent exhaust steam in et devices are arranged side by side. Each device consists of the steam cylinder 53 with a piston 54, the valve 55 with a spring 56 and a spring seat 57 and the steamsupply socket piece 58. The partof the spring rest on which the spring is resting is ball shaped,` so thatthe valve al' ways will beuniformly pressed against the vvalve seat. The three steam supply socket pieces 58 are by means of three pipes connected to the three live steam pipes and. when one of the injectors receiveslve steam through the pipes the corres nding exhaust steam inlet device is open and the exhaust steam will .flow into the corresponding exhaust steam injector. `The steam supply socket pieces 58 might howeveralso be connected to the individual delivery chamberv 59 of the live steam injectors. 's

As usual each live steam injector comprises Ya check valve 60. which opens into a common collecting chamber 61 for the feed water.

From this chamber the feed water ispressed Iinto the boiler through the pipe 12. Each 1 of two different parts.

exhaust steam live stem injector is further as usual'equipped with an qverow valve 62 through which the overflow water passes into a common overflow chamber 6 3 from which the water flows backinto the tender or another suitable receptacle through the pipe 13 and the` return conduit 14.

The starter -shown'in Fig. 2 consist here The frontv part 17- 22, which is .operated by engine steam is still in the exhaust steam pipe 2 and has therefore not been specially illust-rated. The rear part 17a-22a is now present in a triple arrangement and islocated immediately in front of the injectors. The reference numerals 53-58 denote therear part of theA starter in this constructional form of the device. Principally this starter is of the same kind as that shown in Fig. 2. The starter may of course alsobe constructed in such'. a manner, that the front part 17-22, which -is operated by the engine steam, remains unchanged and is directly coupled to the rear part 53-58 in a numberfcorresponding to the number of injectors, whereby a separate ipe 5 is arranged for each injector. In thls constructional form of the invention the entire starter' is thus separated from the injector casing.

The e'ect is similar to. that described in connection with the arrangement illustrated in 'Figures 1-4. When the engine works the exhaust steam flows continually through the front part of the starter to the feeding device and in accordance with the'efect of the locomotive the live steam is let into the injectors through one, two or three live steam pipes by`- means of the manually operated valves 10. 'In accordance with the number of live steam pipes hich are open at a given time the correspon ing inlet valves 55 are opened, and the exhaust steam will operate 'the injectors, which at this time are work at which the live steam is mixed with ex- -115 haust steam, whereupon the mixed steam is brought into contact with the feed water.

` V'Ihe throttling of the exhaust steam in the i exhaust steam nozzle 31 may also be carried out automatically, for instance by moving the spindle 50 axially by meansv of a thermostat.

liao

The spindle v50 may also be operated from above, for' instance from the .drivers stand,

by means of special handles.

It also lies within the scope of che invention to equip each of the injectors of the kind shown in Figures 5-8 with a separate feed pipe 1.2 or a separate return pipe 13. Also the fresh water may be conducted to each injleictor through a separate pipe.

avingnow particularly described and 'ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:-

, y 1. In a boiler feeding device, especially v for locomotives, aA two-stage injector, the first stage being started with live steam while cold water passes through the second stage,'

an exhaust steam starter separated from theI injector in-the exhaust steam pipe of the ,110 slide valve chest of the locomotive, said starter consisting of a pair of automatically closing valves' arranged one behind the other for regulating the supply of steam to the. injector, the exhaust steam of the locomotive 15 being only admitted lin the second stage of the injector when the injector delivers as live -4 steam injector. Y 2. In a boiler feeding device, especially for locomotives, a two-stage injector,an exhaust. 2 steamstarter separated fromithe injector in the exhaust steam pipe of the slide valve chest of the'locomotive, said starter havin two automatically closing valves arrange one behind the other and each havingra pis-f 25 ton adapted to slide in a cylinder while the cylinder of the irst valve communicates with the admission chamber of the slide valve chest through a pipe subjected to the liveA steam pressure and the cylinder f the second valve communicates througln a pipe which is in communication with the delivery chamber of the said exhaust steaminjector. 3. In a boiler feeding device, especially for locomotives, a two-stage in'ector, an exhaust steam starter separated om the said injector inthe exhaust steam pipe of the slide valve chest of the locomotive, said exl haust steam starter having two automatically closing valves, one arranged behind the 4 other and chambers with discharge cocks pro? vided beneath the same in the casingrfor the separation of oil, water and other impur-L'V ties in the exhaust steam by a 4change of direction of the exhaust steam when passing through said valves. A v In testimony whereof I aix my signature.

KOLOMAN REZSNY.

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