US680818A - Steam-generator. - Google Patents

Description

Patented Aug. 2U, |90l. W. G. STONES.

STEAM GENERATOR. (Application md'Nov. 21, 189s.;

4 Shams-Sheet l.

(No Model.)

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Patented Aug. 20', |90I.

W. G. UB'NES.4

STEAM GENERATOR.

(Application filed Nov. 21, 1898.)

4 Sheets-Sheet 2.

(No Model.)

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N0. 680,'8l8. Paened ug. 20, I90I. W. G. STUNES.

STEAM GENERATOR.

(Alplicatibn med Nov. 21, 189s.)

(No Modal.)

Wlfzzeffan www-fak Patented Aug. 20, 190|. W. G. STUNES.

STEAM GENERATOR.

(Appl'ication med Nov. 21, 189B.)

Z sheets-sheet 4.

No. 680,8I8.

um model.)

V`NrTan StTaTns PATENT Trice@ i .t L il e TWILLIAM GRIMSHAV STONES, OF BLACKBURN, ENGLAND.

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SEEGIFJLCATIQN forming part of Letters Patent No. 680,818, dated August 20, 1901.

Application led November 2l| 1898. Serial No. 697,030. (No model.)

To @ZZ whom, t 711/609/ concer-n:

Be it known that I, WILLIAM GRIMSHAW STONES, a subject of the Queen of Great Britain and ireland, and a resident of Preston New Road, Blackburn, in the county of Lancaster, England, have invented certain new Improvements in or Relating to Steam-Generators, of which the following is a specification.

My said invention relates to apparatus for supplying fuel and heated air or gaseous matter to steam-boiler and other furnaces for the economical raising of steam and prevention or consumption of smoke. The said apparatus is characterized, iirst, by one, two, or more slides or feed-boxes acting in a to-and-fro direction at right angles to the boiler-front under the impulses of a variable lever motion, said boxes provided with means for regulating and indicating their action, receiving fuel from a hopper above, and delivering it to fans beneath for projection into the furnace; secondly, by special arrangemestand forms of plates for distributing the fuel onto various parts of the furnace-grate and means for regulating and indicating the position of suchV plates, and, lastly, by the com plete apparatus being under complete control, easy of repair, and its several parts allowing of expansion and contraction without affecting their efflciency.

I will now describe my invention in detail, reference being had to the accompanying drawings, which illustrate its application to a two-fined (Lancashire) boiler.

Like numerals indicate like parts in the several views.

Figure 1 represents so much of a boilerfront as is necessary to demonstrate the application of my improved stoker and regulating apparatus thereto, the stoker-ttings for the right-hand flue being in section and the stokerfittings for the left-hand flue (so much as is shown) being in elevation. Fig. 2 represents a longitudinal section through one furnace and its corresponding fan-casing and fuelfeed-box, showing the application of the airsupplyingv apparatus. Fig. 3 represents a sectional plan of the stoker, taken through one set of the fuel-feed boxes and through a portion of the fan-casing below the other set. Fig. 4 represents (to an enlarged scale) an arrangement of inclined articulated distributingplates, as seen from the inside of the furnaces. Fig. 5 represents a similar view of another arrangement of the said inclined articulated distributing-plates. Fig. (i repre- .sents a vertical section through the variable lever motion. Fig. 7 represeutsahorizontal section through the variable lever motion on line a b. Fig. 8 represents another plan of the fuel-feed boxes and their operating mechanism, but in a different position from that shown in Fig. 3. Fig. 9 represents the slidebox casing in section and exposing a front View of the operating mechanism of the fuelfeed boxes and the hand wheel and screw for raising and lowering the inclined articulated distributing-plates shown in Figs. 2, 3, and 4. Figs. 10 and 11 represent detached parts of the fuel-feed-box-operating mechanism. Figs. 12 and 13 represent, respectively, a front elevation and longitudinal section (to an enlarged scale) of the adjusting and registering device for the angular setting of the distributing-plates shown in Figs. 4 and 5. Figs. 14 and 15 represent, respectively, an elevan tion and section (to an enlarged scale) of the adjusting and registering device for setting the traverse of the fuel-feed boxes. Figs. 1G and 17 represent in diagram two positions (under the same degree of impulse) of the variable lever motion-t'. e., when full on and when completely stopped.

Referring to the adaptation of my invention to a two-fined boiler in particular, 1 is the boiler-front, and 2 the furnaces. Upon the front of each furnace and upon the boilershell I mount a base-plate 3, or one plate only common to both furnaces; but two are preferred for the better fixing of the plates and to allow of expansion and contraction. Upon each base-plate I mount a fan-box 4, divided by vertical plate 5 into two compartments 6 and 7. In 'such compartments are the fans 8, with by preference three arms or beaters (see Fig. 2) keyed upon the driving-shaft 9, which passes through the box andis carried by bearings 10 and 1l, retained by collars 12. Above and resting upon each fan-box 4 are the slides or feed-boxes 13, inclosed by frame or walls 14 and capable-of working in a toand-fro direction at right angles to the boilerfront. Above each frame 14 is a hopper 15,

the/slotted extension 43 of nut 44 on screw- ,swivels 41 and cause the fingers 42 to movel 2 esame with two or more outlet-throats 16 and de-I signed to contain the supply of fuel to be delivered into the furnace. In each throat of said hopper is a rotary agitator 17 for causing the fuel to descend uniformly into the slide-boxes 13 and prevent choking.

Upon the base-plates 3 or by preference upon a separate base-plate 3 I mount a stud or axle 18, and upon such stud I mount the worm Wheel 19. (See Figs. 2, 3, and 6.) Over said wheel I mount the driving-shaft 9, which passes through the fan-boxes, as aforesaid, and is fitted at one end with anysuitable form of driving means-as, forinstance, the fast and loose driving-pulleys at 21. Such shaft at a point immediately above the worm- Wheel 19 is also ti t ted with the worm 22, which gears with the Worm-wheel 19 and when the.l shaft is in motion drives the worm- Wheel. Above the said worm and worm-wheel gearing and supported-at each end in sockets 23, formed in or on the sides of the frame 14, I arrange a bar or rod 24, capable of a to-andfro endwise traverse. From such rod or bar I suspend a bracket or fork 25, and from a pin on such fork I suspend the lever 26, which I thereby cause to lie immediately in front ofthe worm-wheel 19. Suchlever is provided with a continuous slot or by preference two: slots 27 and 28. Passing through a bracket 29 at the lower end of said lever I provide a screw 30, working in a threaded sliding block` 31, carrying a pin 32, which forms the fulcrum or approximate center upon which the` lever 26 moves. Upon the face of the Wormwheel 19 is an adjustable block 33, (see Fig. 5,) carrying or formed with a stud 34, which projects through the slot 27 or lever 26 and carries an oscillatory slide-block 35, which works in the upper slot 27. The screw 30 only rotates and does not rise and fall in' adjusting the fulcrurn pin 32. With the' worm -wheel in motion the eccentricity of the stud 34 imparts a rocking movement to the lever 26, which therebyimparts a to-andfro motion to the bar or rod 24. Upon the bar or rod 24 is a set of brackets 36, and -carried at the extremity of each of said brackets are rods 37 and 38, one above the other and both passing through the wall or frame 14. Upon each rod within the box is a snug or projection 39, which engages with a fork 40 on the vertically-mounted crank or swivel 41, (seefFigs. 2, 3, 8, 9, 10, and 11,) identified with a finger 42, which engages with 45, operated by hand wheel 46, mounted upon the end of feed box or slide 13. When the bar 24 is operated, as aforesaid, the brackets 36 cause the rods 37 38 to move to and fro, which then by snugs 39 operating upon the forksg4'0 impart a reciprocating motion to the the feed-boxes 13 toward and away from the boiler-front. By the rotation of `screws 45 the movements of each slide can be independently adj usted to a nioety or stopped entirely,

due to the traverse of the nut 44 toward the neutral center of the swivels, Which is allowed by the peculiar cranking of the swivel at 41X. (See Figs. 9, 10, and 11.) To enable the adjustment of the screws 45 to be intelligently determined, I provide an index 47 on each hand-wheel 46 and a pointer 48 for each index, carried by a block 49, sliding in slot 50 in the frame 14 along with the feed-boxes 13. Said pointer carries a detent 51, held Ainto indents in the periphery of Wheel 46 by spring 52.

By the operation of the slides, as aforesaid, it will be seen that a short pulsating action is imparted thereto, and I will now describe the manner in which such action is utilized to feed the fuel to the fans 8 and by them to the furnace. The two throats of the hopper 15 lie over the space surrounded by the rear parts of the slide-boxes 13 and over the plate 4 ,as shownin Fig.2,and consequently the fuel from the hopper falls onto such plate. The slides 13 consist of frames of metal open top and bottom, and the end nearest the boiler lies at all times beyond the throat of the hopper. In thefront part of plate 4 is the opening 4), the edge of which nearest the boiler lies directly over the axis of the fans. Hence as the fuel falls onto the plate 4 it also falls within the walls of the slide, which when set in motion, as aforesaid, moves the fuel forward intermittently or step by step and precipi tates it through the opening 4XX into the fan- IOC) box, where it is caught by the rapidly-rotating fans and projected into the furnace.

To allow for the proper working of the slide-boxes 13, I provide cach one with a strip of felt 13X, (see Figs. 2 and 3,) adapted to absorb a supply of oil or grease and at each stroke lubricatethe box. Such felt is also useful in keeping coaldust away from the slide-box-operating mechanism. The floor of the part containing the swivels 41 forms a Well, in which oil or other suitable lubricant may lie and serve to lubricate the swivels.

To maintain an even and constant feed and to prevent choking, I mount a face-ratchet wheel 53 upon the shaft 54, and upon the bar 24I mount a set of pawls 55, engaging, respectively, with the opposite faces of the wheel 53 at each stroke of the bar 24, imparting a fraction of a turn to said Wheel, its shaft, and the agitators 17. Each fan-box 4 being, as aforesaid, divided by vertical divisionplate 5 the streams of fuel have separate outlets.

In Figs. 2, 3, and 4 I show the arrangement of plates I employ for distributing the fuel to the Various parts of the furnace, which consists of a bracket 56, working in slot 57 in plate 5 and suspended from the rear end of IIO lever 58, pivoted at 59, as shown in Figs. 2

an arc of a circle of aboutforty-flve degrees. To the top edge of each plate 62 I hinge another plate 63, also capable of moving through an arc of a circle of about forty-five degrees. The plates 62 are by preference flat; but the plates 63 are curved or arched, and their normal relative positions are shown in Figs. 2 and 4. To maintain or vary such positions, the plates 62 carry on their rear faces a slotted arm 64E- and the plates 63 a snug 55 and set-screw 66, which latter, passing through the snug and slotted arm and being tightened up, effects the desired relative setting of the plates. The lower edge of each plate 62 is on the slope and slightly curved, with the corner rounded off, as shown, which is a highlyimportant feature in the working of the plates, as the fuel is thereby more evenly distributed upon the grate than if the plates were rectangular.

To effect the adjustment of the plates from the exterior of the furnace, I provide a link or rod 67 for each plate 62, passing through opening G8 in the base-plate 3, coupled to the rear face of plate 62 at one end and at the other end passing through the screwed boss 69, carrying hand-wheel 70, supported by bracket 71. By rotating the hand-wheel 70 the rod or link 67, which is screw-threaded where it passes through the boss 69, is traversed in or out, and consequently the plates 62 are moved ou their hinges.

To facilitate the setting of the plates, I provide the rim of hand-Wheel 70 with au index 2 and a fixed pointer 73, and to maintain them in any position I provide a detent-spring 74. (See Figs. 12 and 13.)

By mounting the distributing-plates n pon adjustable bracket 5G, suspended in turn by lever 58, I permit of their being raised en bloc and caused to leave a clear path for the stream of fuel issuing at the lower part of the outlet and to only act upon the upper part of the stream, or, in other words, allow part of the fuel to fall on that portion of the fire directly opposite the outlet and the remaining part to be directed onto the sides.

According to a modification I may mount the distributing-plates at the outside edges of the-fuel-outlets, as shown in Fig. 5, causing their working sides to face each other and direct the fuel issuing from the left-hand outlet to the right-hand side of the furnace and the fuel issuing from the right-hand outlet to the left-hand side of the furnace, one plate being idle While the other is in act-ion. In this modification the sides of the outlets are square to the shaft 9.

In the case of the plates being mounted in the manner shown in Fig. 5 there is a separate bracket 56 for each set of plates adjustably mounted in parts 5X, and each bracket is separately adjusted by independent levers 58 or by one lever common to both brackets and hand-Wheel or hand-wheels to suit.

Although I prefer the brackets 56 or 56X to bc adjustable, as aforesaid, they may be fixed.

In starting the apparatus motion is imparted to the shaft 9 through the pulley 21. The slide-block 31 is then (or previously) adjusted in slot 2S until the desired rocking movement is obtained, which may vary, according to the supply of fuel desired or rate of feed or in relation to the point at which it is to be automatically stopped. The screws 45 are then (or previously) rotated to give the required stroke of the fuel-feed boxes 13?.

I apply a collar or equivalent device to the screw 30 about the bracket :29 to prevent the end traverse of the screw through such bracket, as shown at 20 by dotted lines in Fig. l.

While I have described my invention as applied for simultaneously feeding two furnaces,-I may utilize separate apparatus for each furnace, and although I describe two fuel-boxes and two fans for each furnace there may be one fuel-box only or one fan to two feed -boxes or more fans or more feedboxes.

While I prefer a blotted lever er bar, I may arrange the oscillatory block and fulcrumblock to slide upon a solid rod or bar, and for the proper fixing or mounting of the parts or for obtaining like movements and effects the details of my invention may be varied Without departing from the principle thereof.

To prevent the fan-boxes getting choked, I provide the hinged door 102, held in position in ordinary working by spring 103, supported by bracket 104 or by a weight.

An important advantage arising from the construction of that part of the casing containing the fuel-boxes is that it permits of an opening being formed at 105 for the inspection of the boxes or for giving access thereto for removal of any obstruction. Such openingis provided with lid 10G. Forinspection of the firing the furnace-doorl07is provided With the opening or inspection-eye 108.. To provide for the better distribution of the fuel, the sides on the fan-box outlets may be sloped, and the part of the casing beneath the boxes may also be sloped, as shown in Figs. l and 3.

Having thus particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. In steam-generator and other furnaces, the combination therewith of one or more slides, or fuel-feed boxes, Working at right angles to the boiler-front; a fan-box and fan, or fans, beneath said slides; a fuel-feed hop` per above said fan-box and slide or slides; a bed or base plate carrying said fan-box and hopper; a rocking lever with variable fulcrum; means for imparting the motion of said lever to the said slides and controlling the movements of said slide or slides 5 inclined articulated fueldistributing plates; means for adjusting and indicating the position of' such plates and their supporting-bracket; and a flow-and-return tube With openings in the return-passage, as set forth.

IOO

IIO

2. In steam-generator and other furnaces, the combination of one or more slide-boxes; a screw upon the end of each box; a nut on said screw with finger or extension formed with opening a swivel7 or crank engaging with said finger; a rod with pin engaging with fork on said swivel; a bracket carrying said rod; a cross-bar carrying said bracket; a lever suspended from said cross-bar; a fulcrum 1o engaging with said lever; an adjustable bracket or block carrying said fulcrum; a screw for adjusting said block; an eccentrically-mounted block engaging with the upper end of said lever; a Wheel carrying said block I 5 and driven by any suitable means, as set forth. 3. In steam-generator and other furnaces, the combination of a supporting-bracket; a distributing-plate hinged at an angle thereto; a further distributing-plate hinged to the top zo edge of said plate, and means for maintaining said plates in proper relation to each other, as set forth.

4. In combination, a supporting bracket or brackets, two sets of inclined articulated distributing-plates; a lever or levers for supporting said bracket, or brackets, and plates; means for effecting the adjustment of said lever or levers; a set of links or rods connected with said plates,ascrewed boss through 3o which each of said rods passes; a support or bracket for carrying said boss; and a handwheel for operating said boss with, or without, index and pointer, as set forth.

5. In combination, the fuel box and slide, 3 5 a rocking lever connected to the slide; a fulcrum engaging said lever; a block carrying said fulcrum; a screw for adjusting said block; a pin or stud eccentrically mounted upon a worm-wheel engaging the upper end of said lever; a Worm gearing with said worm- -wheel; a shaft carrying said worm and means for driving the said shaft.

6. In combination, a cross-bar, a rocking lever, a fulcrum engaging with said lever, a sliding block carrying said fulcrum, a screw for adjusting said block, a bracket through which said screw passes, a collar for preventing said screw traveling, as set forth.

7. In combination, a cross-bar, a pawl or pawls upon said cross-bar; a shaft above said pawls; a face-ratchet wheel upon said shaft; and a set of agitators on the said shaft situated in the throat or throats of feed-hoppers, as set forth.

8. In combination, a set of bed-plates, and fan-boxes, one plate for each fan-casing, and one for supporting the gearing mechanism, so arranged as to allow for their independent expansion or contraction, as set forth.

9. In combination, a fan-casing with tapered sides, divided by a vertical partition, a frame upon said casing with an opening for inspection of feed, provided with a cover or lid, relief-door, spring and bracket casing for containing the slide-box-operating mechanism, as set forth.

l0. The herein described center motion comprising a lever, a rising-and-falling fulcrum therefor with means for adjusting the same, worm-gearing and an eccentric-pin for connecting the worm-gearing with the lever, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

WILLIAM GRIMSHAW STONES. Witnesses:

WALTER GUNN,

GEOFFERY ANDREWS.

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