US1073602A - Injector. - Google Patents

Description

J. W. GRANTLAND.

INJEGTOR APPLICATION FILED DB0.30,1911.

1,073,602, Patented Sept. 23, 1913.

5u vente@ JOHN W. GRANTLAND, OF CINCINNATI, OHIO.

INJECTOR.

Lovaeoe.

Application filed December 30, 1911.

Specification of Letters Patent.

` atented Sept. 23,1913.

serial No. 668,678.

To all whom it may concern.'

Bc it known that I, JOHN WALTER Gama?- LAND, a citizen of the United States, residing at Cincinnati, in the county of I-Iamilton and State of Ohio, have invented certain non1 and useful Improvements in Injectors, of which the following is a. specification.

My invention relates to an improvement in injectors and primarily to that class in which the various areas are constant and proportionate with a given steam pressure admitted into the injector for lifting and delivering the water. In an apparatus of this class, admitting a higher steam pressure stalls the functioning, and to obviate such objection I have provided a by-pass between the forward end of the forcing combining tube and the overflow chamber in the rear thereof, and at a plane below said chamber, to always insure the filling of said passage with water, thereby providing a change of course when the flow is interrupted at the mouth of the forcing combining tube.

rIhe object, therefore, of my invention is to provide an injector with a passage leading from the mouth of the forcing combining` tube to a point in rear thereof, and in a plane beneath the same to enable the passage to be constantly filled with water.

Another object of my invention is to provide an injector with a water reservoir and passage interposed between the water inlet and outlet, providing a by-pass around the forcing combining tube at the steam nozzle end and below a water level within the injector, with a valve automatically controlled by the pressures within the injector, on both sides thereof, to open the passage when the operation of the injector is interrupted at the mouth of the forcing combining tube, due to admitting an increased steam pressure.

The features of the invention are more fully set forth in the description of the accompanying drawing, forming a part of this specification, in which the figure represents a cent-ral vertical section through the injector, with the steam and water valve and their operative connections shown in elevation.

Injectors of this class having fixed areas of steam discharge and of water entrance to the combining tube are limited as to the pressure of the injected steam to deliver a maximum quantity of water to the boiler` and also limited as to the temperature of the water with the capacity decreasing as the steam pressure is raised. An increased discharge from the forcing steam nozzle requires a greater area within the forcing con'ibining tube to receive a greater supply of water to effect the proper condensation of the steam, and as the parts are of fixed areas, interruption follows. To obviate this, various attempts have been made to provide a. supplemental port leading from the water supply to the overflow chamber or from the lifting chamber to the overflow chamber, but at a point or plane above the water line or level within the overflow chamber. Such ports are provided with au automatically controlled valve, so that when the pressure becomes greater within the overflow chamber and under normal working conditions, the valve will be closed, and the reverse when the pressure is greater on the other side of the valve. These forms, however, have been theoretical and not practical, for the reason that when the steam pressure disturbs the water area within the forcing combining tube, it creates a suction pressure on one side of the valve and a pocketed pressure upon the opposite side of the valve greater than the pressure of the water within the lifting chamber. This will maintain the valve in its closed position, in which instance, both water passages will be closed, interrupting the operation of the injector. As the air or vacuum prcssui'e seeks the highest level within the overflow chamber and pockets toward the mouth of the forcing combining tube, it cannot be broken by the overflow valve at the discharge end of the overflow chamber.

l/Vith my improvement the relief valve is always submerged in water and below the air or vacuum pressures in either the receiving chamber or overflow chamber and beyond the suction pressure at the forcing combining tube. rfhercforc, when the foreing combining tube is stalled, caused by the increased steam pressure, the pressure created in the upper portion of the overflow chamber can escape through the overflow valve, and if pocketcd, assists in forcing the water to the delivery tube through the lateral openings of the combining tube. This will not affect the passage of water from the lifting chamber to the overflow chamber, conveyed by either pressure or gravity, as

the pressure in each instance, or chamber, is

above the water level and greater on the lift- I ing chamber side.

The lifting tube and its steam jet are not aected materially bv any increased pressure, for the reason that the steam jet area can never discharge steam sufficiently to affect the area of water inlet1 as in the case'of the forcing j et within the forcing combining tube, therefore, if anything, its lifting power is increased, and the water supplied into the lifting chamber under a greater pressure than normally, and together with its 'weight it will have a downward tendency toward the overflow chamber. Thus, the supplyV required can be maintained without interruption.

1 represents the casing or body of the injector, divided into a series 'of compartments or chambers, in which 2 represents the steam supply chamber, having a branch'conne'ction 3, which can be suitably coupled to the steam supply.

4 represents the water supply chamber, and 5 a water supply branch adapted to be suitably conn-ected or coupled with piping leading to the source of supply.

6 represents a lifting' or supplemental water supply chamber, and 7 the overflow chamber. rlhe lifting' or supplemental supply chamber is preferably disposed between the supply chamber l and overflow chamber 7 and extended below the bottom plane of the overflow chamber, and S represents a passage leading from the supplemental supply chamber into the base of the overflow chamber.

9 represents a valve controlling the port 10, between the supply chamber l and the branch 5, with its stem 11 supported within and projected through the bonnet 12 screw threaded into the casing 1.

13 represents the forcing steam nozzle, one end communicating' with the steam supply chamber 2 and projected through the supply chamber l and supplemental supply chamber 6 and into the forcing combining tube 14 disposed in an axial plane therewith.

15 represents the lifting steam nozzle telescopically engaged over the forcing steam nozzle and concentric therewith, and 16 represent steam passages leading from the supply chamber 2 to the no-zzle 15.

As shown in the drawings, the receiving end of the forcing steam nozzle 13 is provided with a valve seat to receive the valve 17, for controlling the supply of steam to the lifting steam nozzle, and 18 represents a valve plug concentrically projected from the valve 17, and adapted to project into the bore of the forcing steam nozzle to control the steam supply thereto. The valves are both simultaneously controlled, but it is possible in starting to admit steam to the lifting nozzle in advance of admitting steam to the 22 is split and adapted to be frictionally clamped to the sleeve of the bonnet for locking the valves -in any adjusted position. V25 represents the lifting combining tube mounted between the supply chamber t andV supplemental supply chamber 6, its conduit converging toward the supplemental supply --chamber and forcing combining tube 14, and `through which the forcing steam nozzle 1s projected axially. The combining tube, as illustrated, is formedof a s-eries'of sections with their connecting ends arranged to form the lateral openings 26.

' 27 represents the delivery tube or nozzle connected with the combining tube, with its bore diverging from thercombining tubes toward its discharge -end and mounted in an axial plane therewith. As illustrated, the delivery tube 27 is connected with a cylindrical fitting 28, mounted within the end of the casing 1 and provided with a check valve 29, to seat against the discharge end of the delivery nozzly 30 represents a coupling secured against the ends of the coupling 28 and casing 1, by means of the coupling nut 31, screw threaded upon the end of the casing.

The passa-ge 8 of the Vsupplemental supply chamber 6 is provided with a valve, preferably o-f the type illustrated, in which 32 represents a tubular fitting screw threaded into the casing and provided with ports opening into the passage 8.

33 represents a check or puppet-valve adapted to seat against the end of the fitting 32 to seal the passage between the'overflow chamber 7 and supplemental supply chamber 6. The valve 33 is provided with a spider-projection 3.4i-, fitting within the bore of the fitting 32, to guide the valve in its movement and provide means for detachably connecting` the valve stem 35, screw threaded within the fitting, whereby the valve can be locked in its closed position, or limited as to its opening movement. This valve is made the subject-matter of a separate application, but it is obvious, that various other forms of valve may be provided without departing from the features of my invention.

36 represents an outlet port from the overflow chamber 7 communicating with the passage 37, eXtending circumferentially around the .casing and provided with an outlet at the base portion thereof, and with an outlet fitting 38.

39 represents a check valve controllingthe port 36, to prevent influx of air when the pressure within the overflow chamber is lower 'than that of the atmosphere. Said valve is mounted within the spider ll0.

l1 represents a cap within which is mount ed or journaled the cam 4t2 fixed to the spin dle 43, adapted to be swung to a position to lock the valve 39 against opening.

42 represents a hand lever fixed to the spindle t3 for manipulating the same.

From this description it will be understood that under ordinary conditions of operation, the effective pressure in the over flow chamber 7 will be greater than the pressure in the supplemental water supply chamber 6, and hence the puppet valve 30, cont-rolling the passage between the supplemental and overflow chambers will remain seated, the water being fed under the influence of the forcing and lifting steam cur rents, this being the contemplated normal functioning of the injector, obtaining from a minimum to a predetermined maximum pressure. When, however, under temporary abnormal conditions the pressure of the entering steam is super-maximum, the creation of the vacuum and voiding the steam through the opening 36 will materially decrease the pressure in the overflow chamber until there is a preponderance of pressure in the water supply chamber 6, at which time the puppet valve will be raised and water from the supplemental chamber will be forced into the overflow chamber, the water being fed out through the forward end of the injector, thus making as it were, a detour under the block without interrupting the continuous and eflicient function of the injector, and this performance will continue until a restoration of normal conditions reestablishes the preponderance of pressure in the overflow chamber, thus seating the puppet valve, the water again feeding straight through the injector through the agencies of the forcing and lifting steam currents.

Having described my invention, I claim 1. In an injector having an overflow chamber, an apertured forcing combining tube projecting through said chamber, a valve controlled opening to the atmosphere communicating with said chamber, a lifting combining tube adjacent the receiving end of the forcing combining tube, a chamber below the discharge end of said lifting combining tube communicating therewith and with said overflow chamber and at the base thereof, and an automatic valve therefor opening to the overflow chamber.

2. In an injector having an overflow chamber, a forcing combining tube within said chamber apertured to communicate therewith, a lifting combining tube adjacent the receiving end of said forcing combining tube, co-axial steam nozzles, one discharging into the lifting combining tube and the second into the forcing combining tube, a valve controlled opening in said overflow chamber open to the atmosphere, and a second opening in said chamber at a plane below said atmospheric opening communicating with the mouth of said forcing combining tube and below the axial line thereof, and an automatic valve intercepting said opening.

3. In an injector having an overflow chamber, an apertured forcing combining tube within said chamber, a lifting combining tube adjacent the receiving end of said forcing combining tube, co-axial steam lifting and forcing nozzles, one discharging into the lifting combining tube, and the second into the forcing combining tube, a valve controlled opening in said overflow chamber open to the atmosphere at a point above the apertures of the forcing combining tube, a water chamber intermediate of the lifting and forcing combining tubes communicating therewith and with the overflow chamber at a point below the aperture of the forcing combining tube to permit the discharge of vater entering said chamber from said lifting combining tube to flow by gravity into said overflow chamber, a valve intercepting the opening between said water and overflow chambers automatically controlled by a. preponderance of pressure upon either' side thereof, and means for maintaining said valve in its closed position.

l. In an injector, a casing divided into series of chambers progressively arranged, comprising steam, water supply, intermediate water supply and overflow chambers, an apertured forcing combining tube within said overflow chamber, a lifting combining tube intervening between said supply and overflow chambers adjacentl the receiving end of said forcing combining tube, a steam lifting nozzle intervening between said. steam and water supply chambers adjacent said lifting combining tube, a steam forcing .nozzle intervening between said steam and overflow chambers projecting axially through said lifting combining tube with its discharge beyond the same, an opening in said overflow chamber open to the atmosphere at a point above said forcing combining tube and a second opening in said overflow chamber at a plane below said forcing combining tube communicating with the lifting combining tube discharge below its axial line.

5. In an injector, a easing' divided into series of chambers progressively arranged, comprising steam, water-supply, intermediate water supply and overflow chambers, an apertured forcing combining tube within said overflow chamber, a lifting combining tube intervening between said supply and overflow chambers adjacent the receiving end of said forcing combining tube, u :steam lifting nozzle intervening between said steam and water supply chambers adjacent said lifting combining tube7 a steam vforcing nozzle intervening between said steam and overflow chambers projecting axially through said lifting combining tube with its discharge beyond the same, an opening' in said overflow chamber open to the atmosphere at a point above seid forcing combining tube, and a, second opening in said overflow chamber at a pla-ne below said forcing combining tube communicating with the lifting .combining tube ydischarge below its axial 1 JOHN wl GRANTLAND.

Witnesses i CLARENCE B. FOSTER, Y LOUISE BECK.

Copies of this patent vmay be obtained for veie'ents each, by addressing the Commissioner 0:1.' Patents, Washington, D. C.

Images