US1586557A - Controlling device for exhaust-steam injectors - Google Patents

Description

June 1 1926.

M. HARD CONTROLLING DEVICE FQR EXHAUST STEAM INJEGTORS 1925 2 Sheets-Sheet 1 Filed August 12 D R A H O T M N L W 0 Nu A M 2 Sheets-Sheet '2 M. HARD Filed Au ust 2, 1925 INVENTOR MALcaLM Hana L n MN 3%. fi v I v 4- %um m w w w w n a in/2% w mm CONTROLLING DEVICE FOR EXHAUST STEAM J INJECTORS HHHIHHIHI June 1', 1926,"

' ATTORNEYS Patented June 1, 1926.

nancomvr coivrnonnme DEVICE "FOR EXHAUST-STEAM livm cmons. I I I i Application filed August 12,1 Serial 49,724. I

1 "This invention relates to steam injectors of the type which aredesigned foroperation I primarily by exhaust steam from an, engine, the action of which steam is supplemented by a'supply of live steam in order to secure the pressure required at the delivery nozzle of the injector to overcome the boiler pressure. vIthas been found in prac-' tice that underv normal running conditions it is necessary to supply: the 1n ector.w1th(very little or almost a negligible amount of sup- -)lementarfy.live steam and that it is only necr For the purpose of -illustration, the con-- essary to open the supplementary live steam line to: its fullest extentwhencertain critical conditions exist. It has also been found that the impulse of the average engineman or operator is to throwthe injector controls wide open, thus causinga greater amount of live steam to be used than is necessary. Consequently, an excess amount of live steam is; used and the m e tOristherefOre notoperated under the most eflici'ent or economical conditions." Y r It is the principal object of the present invention to provide a new and improved controlling device, for an injector of the type which; passages are formed for the live steam to passto the valvefmember 26 The valve member 26 controls :the flow ofathe live referred to, by means of which the operation of the. injectorxunder the'most efficient and economical conditions will be secured.

a part hereof, and wherein Fig. l'isaxside elevation of acontrolling device for an exhaust steam injector,- the injector being shown in section; Figs. 2, 3 and 4areenlarged details of the controlling" device, Fig.

2 being an enlarged side elevation, partly in is; shown as a' valve shaped'.structure,but which may be of any suitable or well known construction. Connected to the valve casing 20. and in communication with the interior section, Fig. 3 a section on the-line 3 3 of 4 and Fig. 4 a section on the line of Fig.3.

trolling device is shown in the; drawings as connected with an'finjector 10, which,-as

I showm is provided with a-mainsteam nozzle 11, a combining nozzle 12', adelivery nozzle j 13 and a supplementary live steam nozzle 14. Exhaust steam'is admitted to the injector through the exhaust steam, inlet 16 whiehis 'provided with. a valve '17, adaptedgtobe .helditoits seat by the ;.press ure of the exhauststam and-to be opened aga nst such after-- described. Y

consists of a valve casing 20, having an inlet 2ljtowhichis connected the pipe 22 which leads to any suitable live steam supply, as

forexample, thesteamturret of the engine HA DQQ B G/N W KgASsIGNOR 'ro THE surmam com may; or-ivnw YORK, N. Y., a CORPORATION or DELAWARE. p.

pressure by the fluid pressurevactuatingl means 18, operated'in a manner to be hereinboiler. Mounted in a suitably'screw thread 3 ed stufiing box 23, securedtothe casing .20, s a valve, rod 24, adapted to be actuated by. r themanuallyoperable control handlez25 secured 'to the outer end of said "valve'rod.

,The inner end of said. rod'is swivelly connected to the "main valve 26-which'consists of a pair of swivelly connected valve mem-c bers 26? and 26". The valve n1ember'26 controls the passage of steam from'the entrance chamber 27 ofthe valve casing 20, to

the laterally extending passage 28, which leadsto the-outlet 29, connectedfby thejpipe 3Qto the injector 10 for supplying live steam to. the supplementary live steam nozzle 14.

The inner end of the valve member 26 is form of radially extending webs. between provided with guides 26 arrangediin the steamv from the passage 31 to a chamber 32 v valve 33 and are adapted to engage respectively with'the cooperating seats 3a, 34 of the; valve casing .(see Fig. 4:).f-Slidably mounted in a .suitable'bearing cap 35, im-

mediately abovetheautomatic valve33, is a fluid pressure responsive member 36, which thereof, immediately above the member 36, is'one endof a pipe 37, the other end of which leads to them'ain steam line or' the exhaust steam linebf the engine. Below the lo'we'rvalve seat 3 for the automatic valve 33,- the chamber 32 communicates through'a lateral passage 38; with the outlet 39, from which the pipe 4.0 leads tothe injest r o supply it i ha xili ry live Steam.

Located between-the upper valve seat :34

and the fluid pressure member 36, is a widened channel stl, with which a pipe 42 communicates, said pipe leading to a chamber 4-3 of the injector and serving under certain conditions to be hereinafter described to conduct steam to the fluid pressure member 18 slidably mounted in said chamber. Encircling and secured to the radial guides :26 of the valve member 26 is a sleeve 45, see Fig. 3, which is adapted when the valve rod 2st is unscrewed to its fullest extent to move across and close the lateral passage 28 leading to the outlet 29 for the supplementary live steam.

The operation of the device is as follows; it it is desired to startthe injector, the control handle 25 is manipulated to move the main valve members 26, 26 to the left (Fig. 3), thus lifting the valve member 26 off its seat and permitting the live steam from the entrance chamber 27 to flow through the passages between the radial guides towards the valve member 26*. In the first movement of the valve rod the valve member 26 will remain seated because of the lost motion (as clearly shown in Fig. 3), provided in the swivel connection between the members 26, 26". A portion of the steam passes through the lateral passage 28 to the outlet 29 and thence through the pipe 30 to the supplementary live steam nozzle 1a of the injector, thus providing a preliminary steam flow in the injector. As the valve rod 24 is unscrewed further, the valve member 96 is unseated and a portion of the steam flows to the chamber 82, for the automatic valve. If there is steam under pressure in the pipe 37, exhauststeam will therefore be available for operating the injector, and the automatic valve will be held by the member 36 upon its lower seat 34 The steam entering chamber 32 will, under these conditions, pass upwardly to the widened annular channel 41 from which it will pass through the pipe to the chamber 43 of theinjector and raise the member 18. The upper end of the memher 18 being forced upwardly by the steam will contact with the exhaust steam valve 17 and raising said valve oli" its seat will permit the exhaust steam to flow through the injector. If there is no steam under pressure in the pipe 87, the live steam entering chamber 352 will raise the automatic valve oil its seat 34 and such steam will pass downwardly (Fig. 4) through the lateral passage 38 to the outlet 39 and thence through the pipe 40 to the injector.

It will be seen that when the controlling device is provided with the sleeve 45, should the engineman follow the natural impulse to throw the injector wide open, he will unconsciously have turned the valve to its most economical sitting, or if he has thrown the valve handle too far so that the steam is entirely shut ofi' from the supplementary nozzle, the injector will spill through the overflow and he will necessarily have to adjust the handle to its correct position.

It will be understood that the present disclosure is merely illustrative of a satisfactory valve casing or main controlling device equipped with my invention, and that obviously many changes, variations and modifications of the control might be resorted to without departing from the spirit of my invention.

I claim 1. The combination with an exhaust steam injector adapted primarily for operation by exhaust steam and having a conduit connected therewith for supplying live steam to supplement the action of said exhaust steam, of a valve for controlling the admission of said live steam to said injector, and means secured to said valve to throttle the supply of live steam when said valve is moved substantially to its full opened position.

2. The combination with an exhaust steam injector adapted primarily for operation by exhaust steam and having a conduit connected therewith for supplying live steam to supplement the action of said exhaust steam, of a valve for controlling the admission of said live steam to said injector, said valve being provided with a manually operable handle and means secured to said valve to throttle the supply of live steam when said handle is thrown to a position corresponding substantially to the full opening of said valve.

3. The combination with an exhaust steam injector adapted primarily for operation by exhaust steam and having a conduit connected therewith for supplying live steam to supplement the action of said exhauststeam, of a valve for controlling the admission of said live steam to said injector, and a sleeve secured to said valve, said sleeve being constructed and arranged to throttle the admission of steam to said conduit when said valve is moved substantially to its full opened position.

4:.Tl18 combination with a controlling device for an exhaust steam injector in which a manually operable main control alve is provided for controlling the admission of exhaust steam and supplementary live steam to said injector, of means connected with said valve for throttling the supply of live steam to said injectorwhen said valve is moved substantially to its full opened position.

5. The combination with an exhaust steam injector adapted primarily for operation by exhaust steam and having a conduit connected therewith for supplying live steam to supplement the action of said exhaust steam, and a valve for controlling the admission of said live steam-to said injector,

- normal operating conditions ofq-theinjector said valve being provided with a manually.

operable handle movable. between two e'xtreme positions, in one of which said valveis closed and 111 the other of wh ch 1t is fully open, of means connected with said valve to' throttle the supply of live steam to said injector to the proper amount for when said handle is moved adjacent to th said other position; a

6. The combination with an eXhaust'steam injector adapted primarily for operation by exhaust steam and having a conduit connectejd therewith for supplying live steam ,to supplement the action of said exhaust steam," anda valve for controlling the admission of said live steam to said injector,

j said valve' being provided witha manually operable handle 'movablebetween twoextreme positions, in one of which said valve.

is closed and in the other offwhich it is fully open, of an auxiliary valve associated with. said first gnamed" valve to throttle the supply of livesteam to said injector to the proper amount for normal operating conditions of the injector. when said handle is moved to the saidother'position, said auxiliary valve permitting the full supply of live steam to pass to said injector when'said to supplement the'eaction of said exhaust steam, and a valve for controlling the aid- 1 mission of said live steamto said injector,

said valvebeing provided with a manually operable handle movable between two extreme positions, in one ofwhich said valve 7 is closed and in the other of which it is fully open, of a sleeve associated with said first named valve and movable therewith to a position in which the supply of live steam to said injector is throttled to the proper amount for normal operating conditions of the injector when said inanuallyoperable handle is moved to the said other position,

and said sleeve being located in a position in which saidsupply of livestean 'will not be throttled when said handle is locat'edbetween said two extreme positions.

In testimony whereof I have signed this specification.

MALCOLM HARD. I p

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