US430308A - Injector - Google Patents

Description

(ModeL) 1:". R. WILLIAMS.

INJECTOR.

Patented June 1'7, 1890.

.WITNESSES CM 08. cam. MW

NITED FRANK R. WILLIAMS, OF SYRACUSE, NE\V YORK.

'INJ ECTO R.

SPECIFICATION forming part of Letters Patent No. 430,308, dated June 17, 1890.

Application filed March 19, 1890- Serial No. 344,536. (Model-l To all whom, it may concern.-

Be it known that I, FRANK H. WILLIAMS, residing at Syracuse, Onondaga county, State of New York, have invented certain new and useful Improvements in Injectors for Feeding Boilers and for other Purposes, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to an injector to be worked by the action of low-pressure or exhaust-steam, assisted in some cases by highpressure or live steam, or by live steam only.

My invention further relates to an injector which shall be simple and efficient in operation,which shall lift its feed-water and deliver the same to the boiler at a high temperature, which shall start and restart without other manipulation than the admission of steam, and which shall work through a range of variations exceeding that of which ordinary inj ectors are capable.

In the accompanying drawings, Figure 1 is a longitudinal section. Fig. 2 is a section on the line so :0, Fig. 1, showing the valve-seat.

Fig. 3 is a section on the line 5 s, Fig. 1, of the steam-nozzle. Fig. at represents the parts in a position hereinafter described.

Referring to the parts by letter, A and B represent the upper and lower parts of the outer casing.

C is the water-inlet to the water-chamber P.

D is the discharge-chamber closed by the cap R.

E is the exhaust-steam branch.

G is an outlet-branch leading to the boiler.

I is the combining-tube supported by the sleeve M.

N is the steam-nozzle.

O is the overflow chamber with outletbranch Q.

T is the lifting-tube.

V is the steam-valve.

a is the central passage in the nozzle N for live steam.

e is the exterior passage in the nozzle N for exhaust-steam.

c is a passage for live steam to the exterior nozzle-passage e.

f is an arrow pointing toward the steamnozzle.

h is an intermediate overflow.

2' is the passage of the combining-tube I.

j is the jacket or flange surrounding the upper portion of the combining-tube I.

7,; is the lower end of the combining-tube I.

l is the space inclosed by the jacket j.

0 is the lower overflow.

p p are ports through the sleeve M.

q is a recess in the end of the lifting-tube T.

r is a space between the lifting-tube T and the combining-tube I.

tis a space between the jacket j and the edge of the recess q.

u, o, and w are ports in the valve V, corresponding to the nozzle-passages c, e, and a.

The combining-tube I is formed with the usual contracting-passage t, widening at its rear end 70, the widening portion forming the delivery-tube. The rear portion of the combining-tube I is cylindrical and fits within the sleeve M, being permitted longitudinal movement therein. Ports 1) 19, through the sleeve M, communicate from the overflow 0 in the combining-tube to the chamber 0. The ports 13 p are of tapering form, (see Fig. 3,) the reason of which is hereinafter explained. The forward end of the combining'tube is litted to enter a short distance into the liftingtube I. Surrounding the forward portion of the combining-tubeis a jacket orfiange j, the interior of which Z communicates with the passage 2' by means of ports h. The jacket j is fitted to enter the recess q of the liftingtube.

The relation of the parts is such that when in the position for starting there is a space 7" between the combining-tube I and the lifting-tube T, and a space 15 between the jacket j and the recess q; but when the combiningtube moves longitudinally it enters the lifting-tube T and the jacket J enters the recess q before the overflow 0 is closed, (see Fig. 3;) but when the movement is complete the overflow 0 has passed the ports 19 p and is closed. WVhile the overflows have separate and distinct functions to perform,they mutually cooperate and supplement each other.

The overflow h is preferably placed somewhat above the smallest contraction of the passage 1, and the overflow 0 at or below the smallest contraction of the passage '6.

By closing the overflows the injectoris enabled to work with a higher temperature and under greater variations than with an overflow open to the atmosphere. It can therefore use a larger quantityof steam, deriving more act uating-power, well as imparting more heat, therefrom.

The object of the jacketj and of the taperng ports 10 pis that when starting or restarting, the combining-tube, if unchecked, would move quickly to its extreme position. This would close the overflows suddenly, and, if before the boiler-current be fully established, such shock might break the jet. If, however, the overflows r and h be first closed and the overflow 0 be gradually and not entirely closed until the boiler-current be fully established, such gradual closure will facilitate starting the injector. This is attained as described in the operation.

To put the apparatus into operation, suitable connections for steam and water having been made, the valve V is opened admitting steam to the passage a. When the steam issues with sufficient velocity to pass through the lifting-tube T and escape at the overflows r, h, anoo, it will entrail the air at the mouth of the lifting-tube T and a partial vacuum will be created in the chamber P and water will be drawn from the branch 0 into said chamber P and carried by the steam through the liftingtube T. The jet of water and steam issuing from the lifting-tube T escapes through the overflows r, h, and 0 to the overflow-chamber O. A further movement of the valve V places it in the position shown in Fig. 1, so as to admit exhaust-steam to the passage 6. The combined jet will now become sufficiently powerful to pass through the combining tube. When a current is in process of establishment through the combining-tube, the overflow or outward escape will cease first at the space 4", a portion of the jet escaping at the overflows h 0 and a portion passing into the discharge D. The pressure in the delivery D, acting upon the end of the movable combining-tube I, will press it in the direction of the arrow f; but the water escaping at the intermediate overflow h, at the same time acting upon the interior of the jacket j, exerts a downward pressure. The jet, becoming more powerful, will escape less at the overflow h, and the combining-tube I will move in the direction of the arrow f. When the upper end of the combining-tube enters the liftingtube T at r and the jacket j meets the recess g at t, (see Figs. 1 and 3,) further movement thereof will be arrested by the water from the overflow h, filling the space Z q. hen the jet becomes suf iciently powerful to enter the boiler, water will cease to escape at the overflow h and the combining-tube will move to its extreme position. (Shown in dotted lines, Fig. 1.) The overflow 0, being moved past the ports 19 19, becomes closed from exterior communication, and the water will now all pass to the boiler. The tapering form of the ports 19 10 insures a more gradual closure of the overflow 0. If from any cause the jet becomes insufficiently powerful to pass to the boiler, water will escape at the overflow h, which, acting upon the inner area of the jacket j, will force the combining-tube contrary to the arrow f, thus opening the overflows and permitting the jet to restart. I11 operation this is extremely simple. I have heretofore only described the valve V, admitting live steam from the boiler and exhaust-steam from the engine. \Vhen the valveV is in the position shown in Fig. 3, the exhaust-steam is shut off and live steam is admitted through the passage 0 to the exhaust-steam nozzle-passage, the operation being the same.

I have described my injectoras placed in a vertical position; but it may be placed otherwise, when desired. v

The exhaust-steam may be admitted by the central nozzle-passage and the live steam by the exterior nozzle-passage, if desired.

\Vhen constructing my injector for live steam only, I dispense with the passage 0 and branch Z, and may construct the valve V to admit steam first to one nozzle-passage to work the injector at its minimum, and further movement thereof to admit steam to the other nozzle-passage to work up to its maximum capacity.

Having described my invention, I claim 1. The combination,in aninjeetor, of an admission-valve having ports and passages for live and exhaust steam, and a nozzle having two live-steam passages and an exhaust-steam passage, one of the live-steam nozzle-passages communicating with the exhaust-steam nozzlepassage, the ports of said valve being arranged relatively to the passages in said nozzle, so that live steam may be admitted either to both live-steam nozzle-passages or to one of the live-steam nozzle-passages, and exhauststeam admitted to the exhaust-steam nozzlepassage, substantially as described.

2. The combination, in an injector, of the admission-valve V, having ports and passages for live and exhaust steam, and the nozzle N, having an interior live-steam passage, an exterior exhaust-steam passage, and an intermediate live-steam passage communicating with said exhaust-steam passage, the ports of said valve being arranged with reference to the passages of the nozzle, so as to admit steam either to both live-steam passages or to the interior or live-steam passage and to the exterior exhaust-steam passage, substantially as described.

3. The combination, in an injector, of a steam-nozzle, a lifting-tube T, the longitudinally-movable combining-tube I, having overflow-space 7" between it and the lifting-tube and having overflow 0, and the fixed sleeve M, having ports adapted to register with the overflow 0 when the injector is starting and adapted to close said overflow 0 when the jet has been established, substantially as set forth,

4. The combination, in an injector, of a steam-nozzle, a lifting-tube, the longitudinally-movable'combining-tube I, having overflow-space between it and the lifting-tube and having overflow 0, and the fixed sleeve M, having tapering ports pp, adapted to register with the overflow 0 when the injector is starting and adapted to close said overflow 0 when the jet has been established, as set forth.

5. The combination, in an injector, of a steam-nozzle, a lifting-tube having recess g, the combining-tube I, longitudinally movable in the fixed sleeve M and having jacket j, and overflow-ports h, said elements being arranged as described, whereby longitudinal movement of the combining-tube will close the spaces 7 and t, substantially as described.

6. The combination, in an injector, of a steam-nozzle, a lifting-tube having recess q, the combining-tube L'longitndinally movable in the fixed sleeve M and having jacket j, and overflow-ports h and 0, said elements being arranged, as described, whereby longitudinal movement of the combining-tube will close the spaces 0' t and the overflow 0, substantially as described.

7. The combination, in an injector, of a nozzle having passages for live and exhaust steam, a lifting-tube T, overflow-space 0", and a movable combining-tube Lhaving overflow o and supported by a fixed sleeve M, snbstantially as described.

8. The combination, in an injector, of a nozzle having passages for live and exhaust steam, a lifting-tube T, overflow-spacer, fixed sleeve M, and longitudinally-movable cornbining-tube I, having overflow '0, said parts being arranged as described, whereby longitudinal movement of the combining-tube will close the space 4' and overflow 0, substan tially as described.

9. The combination, in an injector, of a nozzle having passages for live and exhaust steam, a valve controlling said live and exhaust steam passages, a lifting-tube T, having recess 1, and the combining-tube longitudinally movable in the fixed sleeve M, having jacket j, and overflow-ports h and 0, substantially as described.

1.0. The combination, in an injector, of a steam-nozzle, a lifting-tube T, the longitudinally-movable combining-tube I, having overflow-space r between it and thelifting-tube and having overflow 0, and the stationary sleeve M, having ports adapted to register with the overflow 0 when the injector is starting and adapted to close by movement of the combining-tube, said overflow 0, and space 1" when the jet has been established, substantially as set forth.

- FRANK R. WILLIAMS. Witnesses:

CHARLES D. CLARK, WILLIAM G. CLARKE.

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