US1069883A - Injector. - Google Patents

Description

S. L( KNEASS.

INJEGTOB.. A1=1 LI0ATI0N FILED 11H10, 1912.

Patented Aug. 12, 1913.

2 SHEETS-'SHEET 2.

l INVENTDH WTNESSS (miran STATE-s einem omnes.

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:a 'CORPORATION or EENNSYLVXML mancata. si); .1; i

Patented aug. 12,1913.

appnuaammed nay 1o, ham. comme.

-vented a new and .useful Improvement in Injectors, of which the following is Aa u'll,

clear, and exact descriiptiomreference being had to the accompanying drawings, which forma art of this specification.

The dbject of my invention is to simplify the operation of a'n injector by reducing the number of handles or other devices -ttsna'lly required to admit steam and waiter thereto and at the same time to control these two supplies by the limits of motion or positions of a single l'ever. i

`The invention -is applicable to 'injectors of various forms placed either above or below the level of the water supfply and as 'shown in the drawings accompanying this specication is applied to a non-lifting injectorj having two steam nozzles, in which the g steam nozzles 'are .placed in the 'same axial; line and the iet receives a continuous Alineal i acceleration rom its entrance into the com- E birmig tube until it reaches the minimum diameter of the delivery tube. It 'can be used i with equal advantage Ain connection with; 2f

the ordinary form lof usually de-4 noted as the single jet type.

In order to operate a non-lifting injector it is customary to use separate Aand inde-- pendent valves to controlthe steam and wa- L ter supplies, and an overilow valve attached to the injector body. In this case, 'the steam f admission valve may be placed in the steam i pipe at any desired ,point or directly at the steam entrance or branch of the injector. II The water supply valve is preferably pla-ced at or close to the injector. If the positlonf of the valves is inconvenient to the operator theymay be operated. by extension han-dies. 1 The overflow or Waste valve 4is usually similarly controlled When a non-lifting injector is applied to a locomotive it is ad' vant-ageous that means be provided so that the manual o erations necessary to control: the boiler fee be reduced to a minimum in order that the attention of the opera-tors be not drawn unnecessarily from their other duties. It is an object of my invention tol simplify 'the means of operating a non-liftimg injector and to "admit both the steam and water by one lever, which *has a .further fir-action in regula'ting the amount .of 'water entering the inj'ecwr and fed to the boiler.

in time embodiment of my invention 'iflflnstmbed in fthe drawings and hereinafter: described Figure l is fa vertical sectional view of an injector 'embodying my invention; Fig. 2 is a secticnon the line 'off part of 1; Fig. -3 a pian view of the 'lever connecting the steamcontrotling-and water- 'dontmlling valves; Fig.. 4 'is-an erlagel veriicai ma View af of@ aanmaning valve; Fig. s a View, similar iQ i, illustrating a modification; '6 is a isection Aon 'the line 6% of of Fig. 5'; and Fig. t is a dtail 'side view 'of che water,- snppiy 'cont-tolling "v'a'lvel i will im describe the embodiment ef my invention shown 'on Sheet' l, 1, 2, -3 fand 4. a is the-body or casinfg bf the ihjector, 'b is the steam inlet, 'c is tle water iniet, d the valve controlling tnesteam sapy, Ie is the valve stem operating, and oosely attached to, the valve which controis the water supply and is seated upon the partition f ting the Water inlet fc' l rom the `Water chamber fl of the inector. 'The water control valve ff supports the pressure or head of 'water in the tank upon its upper face, *so that fit may act as a 'cheek valve, closing the water chamber f2 of the injector sand antomaticaliy flow. 'b' and b2 are two interacting steam hozzies placed ih the salme exi-i line, b 'a' small annular nozzle which gives the initial momentum to the jet and 52a. larger con-- centric nozzle ivI 'ch ladds 'suicient Velocity toiorce `a continuous of water int/'o the boiler. -At the upper end 'ofthe steam valve is the crosshead k connected by the links z, fi to the forked lever g ivcted :at its oppfosite end te the stem 'e o the water supply valve f. -b is a rod oinn'g the bell crank lever Z to the -connecving lever fg. w, 'y is 'a iatchng mechanism registering with a notched quadrant e.

The operation-is as follows: When steam and watei` are admitted to the inlets b and c, steam pressure and water restaure/(respectively) retain the steam va ve d 'and the wapreventing nv ter valve f to their respectiveseats d and f. Drawing the starting lever Z in the direction of the arrow, pulls upward the rod Zz, and tends to open both the steam valve Z and the water valve f. The total resistance of the valve Z to the upward pull of the rod h,

due to the pressure vof thesteam on the valve d, is in excess of the total resistance of.

the valve f to the upward pull of the rod 7L due to the pressure of water on the valve f so that motion is rst imparted to the stem e, raising the valve f and admitting water to the injector. When the upward motion of the stem e is stopped by reaching the end of its stroke, the pull of the rod h 1s exerted upon the steam valve d which is then opened by the continued motion of the lever Z. Steam is then admitted to the injector, and combining with the entering water forms a continuous jet into t-he boiler. When it is desired to regulate the volume of water fed to the boiler, the direction of motion of the starting lever Z is reversed. The upward pressure of the steam upon the valve (Z and its stem holds the attached end `of the connecting lever g from downward movement, while the downward pressure of the rod Z1. pushes the stem e and the water control valve f toward its seat, proportionally reducing the quantity of water fed to the boiler. By means of t-he latch y and the notched quadrant z the lever Z and the water supply valve f may be retained in any desired position.

In the other embodiment of my invention, shown o-n Sheet 2, Figs. 5, 6 and 7, the injector is also of the non-lifting form and of the same type as previously described and the method of steam admission is the same,

but the injector is provided with a special form of automatic water' supply valve, patentcd by me and described in United States Patent No. 862,078, dated July 30, 1907. So far as the parts of the two embodiments are the same, they are designated by the same .reference letters, and their description will not be repeated. Instead of the manuallycontrolled check-valve f, I employ two valves, one an automatically operated check valve m, normally held closed by the pressure of water in the water inlet c, and the other a cup-shaped notched valve n, secured to the stem e, the stem e being hollow and guiding the upper stem m of the valve m. The lower stem m2 of the valve m extends through the wall of the water-chamber f2 into a steam chamber 0 and in line of movement of a steam actuated piston p in the steam chamber. Each valve acts to control the ow of water from the water inlet to the water chamber of the injector, but the rate 'of iow is determined by the valve n, the

notches 'f2/permitting an inflow even when the valve n .is seated, provided the check valve m 1s ralsed when the valve m is at the top limit of its stroke, the notched water regulating valve n can freely seat upon the partition f, separating the water lnlet cl from the water chamber f2, the stroke of the actuating pistonp is limited so that when The continued motion of the lever Z lifts the valve d, admitting steam to the chamber d2. and to the steam nozzles b and b2. Steam also passes down through the small passageway 1' to the chamber o, where it exerts upward pressure upon the piston 7), forcing 85 upward from its seat the water check valve m andadmittlng water to the water chamber of theinjector, where it is drawn into the combining tube by the act-ion of the steam flowing from the nozzles b and b2 and ,90

is forced into the boiler. If the starting lever Z is moved in the direction opposite that of the arrow, the pressure upon the valve Z and its stem holds .it in its extreme upper position so that the stem e' is forced 95 downward, closing toward its lseat the notched water regulatin valve n, reducing the quantity of water `owing into the injector and fed into the boiler. So long as steam exerts pressure in the chamber o'the 100 piston p holds the Water check valve m upk from its seat so that water may iow into the injector. If the motion of the starting lever Z be continued, the steam valve d. will be moved toward its seat by the action of the .lever g, because the stem e is at the lower limit of its stroke. The area of the notches n admits suiiicient water to condense the entering steam so that the injector will con.V

tinue to operate until the motion of the starting lever Z forces the valve d so close to its seat that the pressurel of the steam in the y chamber d is insufficient to force the water in a continuous jet into the boiler. Therefore, as the valve cZ closes, the steam will be gradually shut off, but water will continue to flow into the chamber f2 so long as the check valve m is raised from its seat. The entering water will condense all of the steam so that the outflow from the waste pipe s will be water without uncondensed steam.V This is due to the notched constructionof the water regulating valve n and the maintained open position of the water check valve m until the steam admission valve Z is en- 1 5 tirely closed, when the supply of steam to the chamber o will be cut off and the water f check valve m will fall to its seat, stopping the flow-of water into the injector.

Having now fully described my invention,

Drawing the 75 what I claim and desire to protect by Letters Patent is: Y j

1. In an injector, the combination, with means controlling the flow of steam and Water respectively to the injector, of mechanism connect-ing said means and acting against the pressure of the steam upo-n the steam admission means to control the Water supply and upon the Water admission means to control the steam supply.

2. In an injector, the combination with means controlling the flow of steam and Water respectively to the injector, of lever mechanism fulcrumed on the steam admission means, and acting against the pressure of the steam on the steam admission means to control the Water supply and fulcrumed on 4the Water admission means to control the steam supply.

3.*In an injector, the combination with valves controlling the supply of steam and Water respectively to the injector, of lever mechanism fulcrumed on the steam supply valve tooperate the Water supply valve and fulcrumed on the Water supply valve to operate the steam supply valve.

4- In an injector, the combination of a valve controlling the Steam supply, a valve controlling the Water supply and lever mechanism connecting and operating said.

valves independently by the difference of press-ure on or resistance to the motion of said valves.

5. In an injector, the combination With valves, controlling the tloiv of steam and Water respectively to the injector, of lever mechanism fulcrumed on both valves, manually operable devices connected With and adapted to operate the lever mechanism in the direction to actuate both valves, and means limiting the stroke of the water valve, thereby enabling the difference in pressure upon said valves to cooperate with said limiting means to cause the successive operation of the valves in the desired sequence.

6. In aninjector, the combination With valve mechanism controlling the iiow of steam to the injector and valve mechanism controlling the ovv of Water to the injector and having a limited stroke, of means connecting said valve mechanisms and enabling the steam pressure upon the steam-control valve mechanisin to permit the operatioirot the Water-supply valve mechanism and enabling the Water-control valve mechanism upon reaching its limit of stroke to permit the operation of the steam supply valve mechanism.

7. In an injector, the combination with the steam and Water inlets. of valve-mechanism adapted to control thejtloiv of steam from the steam inlet to the injector, valve mechanisrn adapted to control the iioiv of Water from the Water inlet to the injector, meansi connecting said valve-mechanisms and adapted to permit the pressure of steam upon the steam control valve mechanism to control the operation of the Water control valve mechanism and adapted' to permit the Water-control valve mechanism to control the operation of the steam-control valve mechanism, and a manually operated device connected with and adapted to operate said means.

8. In an injector, the( combination with the steam and Water inlets, of valve-mecha'- nism adapted to control the HOW of steam from the steaminlet to the injector, valve mechanism having a limited stroke adapted to control the flow ot Water from the Water inlet to the injector, means connecting said valve-mechanisms and adapted to permit the pressure of steam upon the steam control valve mechanism to control the operations of the Water-control valve mechanism and adapted to permit the Water-control valve-mechanism upon reaching the limit of its stroke to control the operation of the steam-control valve mechanism, and a manually operated device connected With and adapted to operate said means.

9. In an injector, the combination With a valve-mechanism adapted to control the flow of steam to the injector and normally held at its limits of stroke by steam pressure, of valve-mechanism having a limited stroke adapted to control the flow of Water to the injector', lever mechanismy fulcrumed on both valve-mechanisms, and a single manually controlled device connected With the lever mechanism and adapted when op- 'erated to move the lever mechanism successively on its two fulcrums by reason of the same being successively held stationary by steam pressure upon the steam-valve-mechanism and by the locking of the Water-valvemechanism at the limit ot its stroke.

10. In an injector, the combination With a valve adapted to control the How of steam to the injector and normally held at its limits of Stroke by the steam pressure, ot a normally-closed valve adapted to control the flow of Water to the injector and having a limited stroke, lever mechanism having fulcrum connections With both valves, and a manually controlled device operatively connected with the lever-mechanism, Whereby when the latter is moved in a direction tending to unseat both valves, the Watervalve and steam valve will operate successively.

11. In an injector, the combination Wit-h a valve adapted to control the tloW of steam to the injector and normally held at its limits of stroke by steam pressure, of water-valve mechanism comprising two valves both adapted to control the flow of Water to the injector, the first of Which is normally held closed by Water pressure and the second of which has a limited stroke, lever mechanism having fulcrum connections with both the second water-valve and the hereunto set my hand, at Philadelphia, on steam valve, a manually controlled device this 3rd day of May,1912. operatvelyconnected with the lever mechanism, and independent steam actuated means d STRICKLAND L' KNEASS' controlled by the steam-valve in its opening Witnesses:

movement to open the first water-Valve. P. PEDRIGK,

' In testimony of which invention, I have F. C. BLAIR.

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