US1828473A - Feed water heating apparatus - Google Patents

Description

Oct. 20, 1931. E. SCHELLENS FEED WATER HEATING APPARATUS Filed Dec.

1'7, 1929 2 Sheets-Sheet 1 Oct. 20, 1931. scHELLENS 1,828,473

FEED WATER HEATING APPARATUS Filed Dec. 1'7. 1929 2 Sheets-Sheet 2 Patented Oct. 20, 19 31 UNITED STATES PATENT OFFICE EUGENE L. scHELL ns, o ErneEwooE, ,NEWJERSEY, AssrcnoE TO .c-s ENGINEER- me co1vrr NY,joE NGEEwooD, NEW JERSEY, A CORPORATION or DELAWARE her 7 is provided. withia valve seatmember- 9 FEED WAT R HEATING APPARATUS Application. filed December 173925;" Serial No. 414,635.

This invention relates to .feed water heat ing devices and is particularly useful for locomotive boilers, andin the present disclosure I have illustrated my invention as applied to this field of usefulness. Furthermore, the invention is particularly useful, for that type of feed water heater which delivers the water to the boiler through a spray valve which is adapted to spray the water into an ascending column of steam as it passes upwardly from the boiler andthen out to a point of use on the locomotive. This type of heater is very fully disclosed in my Patent No. 1,802,125, April 21, 1931. Y

The principal objects of the invention are to improve feed water heaters ortemperature equalizers, as they are sometimes called, of the general type: disclosed in the above mentioned application in such away as to combine with the spray valve. a means for making it performthe function of ,a stop valve in case it is necessary to grind the boiler check valve and to prevent an excess quantity of moisture from reachingithe auxiliaries on the locomotive with the-steam taken'from the heater.

How the foregoing objects, as well as any other objects which may appear hereinafter, or are incident to my invention, are obtained is illustrated in a preferred form in the accompanying drawings, wherein... i Fig. 1 is a vertical section through proved heating apparatus, and 2' Fig. 2 is a partial side elevation of alocomotive illustrating the application. of my improvements thereto. 1; i I

By referring touthe drawings it willbe my'imseen that the boiler 3 ispro'videdwith an opening 4 at the toparound which. I place a flanged collar 5. Adjacent the opening 4 and secured to the collar 5 I place an open ended .casing6 which has .asubstantially cy lindrical central portion -7 on the 'interior extending downwardly into the opening 4. Feed water either from .theiinject'or. or

from the customary feed waterheateron the locomotive is introduced to-thecentral chamher 7 through the feed-Water inletf8. In an aperturein its lower portion the. central chamwhich. is threaded into position as clearly shown in Fig.1. A spray valve 10 adapted to seat upwardly against the seat member 9 controls the flow of the water coming through the inlet 8. Thevalve 9 has an upwardly extending frame structure 11 which enters into the interior of the chamber '7 and which is provided with the annular-shoulders 12 and 13. I

.The upper open end of the casing 6 is closed by means of the cover plate or bonnet 14 suitably held in place in any desired manner, as

by the bolts 15, there being ,a gasket 16 between the casing 6 and the bonnet 14.

Into a central opening in the bonnet 14 is threaded thebushing member 17, the member 17 in effect, forming a part ofthe cover or bonnet 14. l I 1 'Passing downwardly through the cover and the bushing member 17 is a spindle or shaft 18 which has threaded engagement at 19; withthe opening 19'. Between the upper portionof theshaft 18 and the bushing 17 is a suitable packing 20 held in place by meansof the packing gland 21 and the nut u,-Removably mounted on the upper end of the spindle-or shaft 18 isa handle or operat-. ling wheel23 by means of which the shaft can be rotated, and itwill be seen that this handle is'provided with lugs 24 which are adapted to take against the upper. surface of the bonnet .14." f

At its .lower end the spindle 18 carries a shoulder portion 25 which is arranged in op position tothe shoulders 13 and 12 on the valve ;body. Between the shoulders 12 and 15 I place a compression spring 26. This makes the valve '10 a spring loaded valve which will yield sufficiently to permit the water to enter as it comes inunder pressure through 'theyinlet 8.,

: fl'It will be seen that by screwing the. spin- --.dle outwardly by means of the handle 23, the -shoulder25 can be brought against the shoul- .der 13. Theabutment means thus'provided serves to hold the valve 10 tightly against itswseat, and in this way the sprayvalve can be made to function as a stop valve so that the boiler check valve can be ground when necessary, the boiler inspection rules specifying the necessity for such a stop valve. Furthermore, in the operative or normal position the lugs 24 on the handle 23 serve as an indicating means for showing when the spindle 18 is screwed in sufiiciently far to permit the spray valve 10 to function as it should. In other words, all that it is necessary to do is to turn the handle 23 until the lugs 24: con.- tact with the top of the bonnet or cover plate 14.

Set in the opening 4 is an inwardly taper-.

ing ring or collar 26 which cooperates with the casing 6 to form a chamber in which the water and the steam can be mixed and which also serves as a supporting structure by virtue of its cross member 27 at the bottom, for retaining the valve and its spindle in position should the bonnet be removed for cleaning or other purpose. The ring or collar 26 isin open and free communication with the interior of the boiler and the steam from the boiler passes upwardly therethrough and thence into the casing 6 where it is thoroughly mixed with the incoming water by means of the several baflies 28.

In order to ensure a positive circulation of steam, as well as to prevent the formation of air pockets which would otherwise accumulate in the structure as'a result of the liberation of oxygen when the colder water is brought up to boiling temperature, I provide the steam ofi'take 29 under the control of the valve 30 which is connected by means of the pipe 31 to the auxiliar header 32 located on top of the boiler just orward of the cab-'33,

A circulation of steam which is just suflicient to clear the device of air pockets is so.- cured by virtue of the fact that the auxiliary header is in turn connected to the dome 34 by means of the auxiliary header dry pipe 35, so that when steam is drawn from the auxiliary header to run any of the auxiliaries on the locomotive, a flow of steam will be induced through the pipe 31. The quantity of the steam will not be very large, for the primary supply for the auxiliaries will come from the pipe 35 which is connected to the dome 345, but sufiicient circulation will be ensured to prevent the formation of air pockets, as well as to ensure that the heating device or temperature equalizer 6 performs its function in the proper way. i V

The arrangement just described, it will be I; seen, prevents the drawing of a large quantity of steam from the heater to the auxiliaries, as has sometimes been done in previous practicewhere all of the steam for the auxiliaries was taken from the heater. Such steam is ordinarily extremely wet and causes considerable trouble in the auxiliaries, but by my improved arrangement the amount of steam drawn from the heater will be such a small proportion of the total amount used by the auxiliaries that the quantity ofwater or moisture taken over from the heater 6 will be immaterial.

I claim 1. In a heater of the character described, the combination of a casing adapted to be secured to. a locomotive boiler, a water inlet to said casing, a spray valve associated with said inlet for controlling the flow of the in comin water, a spindle extending to the outside 0 and threaded into said casing, opposing shoulders on valve and spindle, a spring interposed between said shoulders yieldingly holding the valve in closed position and means for turing the spindle to compress said spring and bring said shoulders into contact to lock the valve in closed position.

- 2*. In a heater of the character described, the combination of a casing adapted to be se cured to a locomotive boiler, a water inlet to said casing, a spray valve associated with said inlet for controlling the flow of the incoming water, a spindle extending to the outside of and threaded into said casing, opposing shoulders on valve and spindle, means =f'or turningthe spindle to bring said shoulders into contact to lock the valve in closed position, and indicator means on the spindle adapted to register with the outside wall of the casing when the parts are in normal or operative position.

In a heater of the character described,

the combination of an open ended casing adapted to be secured to a locomotive boiler, a water inlet to said casing, a removable cover or bonnet for the upper open end, a spray valve associated with said inlet for controlhug the flow of the incoming water, means extending through said bonnet for locking said valve in closed position, and means for supporting said valve and said locking means when said bonnet is removed. 4. In a heater of the character described, the combination of an open ended casing adapted to; be secured to a locomotive boiler, a water inlet to said casing, a removable cover or bonnet for the upper open end, a spray valve associated with said inlet for controlling the flow of the incoming water, means extending through said bonnet for locking said valve in closed position, means for supporting said valve and said locking means when said bonnet is removed, and means on the locking means adapted to registo: with the outside of the bonnet to indicate when the parts are normal or operative position,

5, In a heater oi the character described, thecombination of a casing having a water inlet, aspray valve associated with said inlet, a spindle threaded into the casing, opposed shoulders on the spindle on the valve, a spring interposed between said shoulders, and abutment means; for limiting the movement of the. valve. with respeetto the spindle, said abutment; means. being adapted to lock the Valve in closed position upon rotation of said spindle.

6 In a locomotive, the combination of a boiler, a heater of the characterdesoribed having communication with the boiler and provided with'a steam outlet, a dome in communication with the boiler, an auxiliary header, a connection between the header and the dome and a connection between said steam outlet and said header.

7 In a heater of the character described, the combination of an open ended casing adapted to be secured to a locomotive boiler, a water inlet to said casing, a cover or bonnet for the upper open end, a valve associated with said inlet for controlling the flow of the incoming water, a spindle extending through said bonnet, a spring reacting between the spindle and the valve for yieldingly holding the valve in closed position, opposing shoulders on spindle and valve normally acting as stop meansto prevent excessive opening of the valve, and means outside the bonnet for moving said spindle to compress the spring and bring the shoulders into contact to lock the valve in closed position.

In testimony whereof I have hereunto signed my name.

EUGENE L. SCHELLENS.

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