US1671651A - Boiler - Google Patents

Description

May 29 1928.

C. E. OLDACRE BOILER Filed Nov. 19, 1925 2 Sheets-Shegt' l m fi mm w 0 F. 6

May 29, 1928.

C. E. OLDACRE BOILER Filed Nov. 19, 1925 2 Sheets-Sheet 2 Patented May 29, 1928.

UNITED STATES PATENT OFFICE.

cnnnnns n. onnaonn, on ronon'ro, ONTARIO,CANADA, ASSIGNOR 'ro THE Gumm "HEATER MANUFACTURING COMPANY, INCORPORATED, OF BOBTONJMASSACHU SETI'S, AL CORPORATION OF MASSACHUSETTS.

" nor-nan. I

Application filed novuaber 1a,, 1925.. swarm. 70,035.

It is the 0 ect of the presentinventioxiv to provide improvements in boilersand furnaces oflthe ty e described in Patent-No.

1,326,621, issue 1 to C. a B. Thompson in; which the ,gases are caused to pass from the cooler through the hotter strata of the fuel bed before being permitted to escape 1 through the chimney.

With this object in view, the various-fea tures oftheinventioni have todo with the adjustment of the furnaceto different kinds of coal and fuel bedsof various dimensions; with arrangements to facilitate a the cleaning of the boiler sections; with an improved adjusting arrangement for the gratebars, and other improvements, the nature of which will more clearly. appear from the following detailed description of a preferr'ed embodiment a and the appended claims.

The drawings illustrate the invention as applied to the structure disclosedwin said patent, to G. B. Thompson, only. so much being shown as is necessa fora clear understandingof the invention. Fig. l-lis a,

vertical cross-section of the boiler and fur nacehFig. 2 a front elevation of the waterfront adjusting mechanism; Fig. 2". details of the adjusting mechanism; Fig. 3 a sectional plan view on lines 33 .of'Fig. 1; and Figs. 4 to 6 are various views illustrating the rate-bar lock. I h

The boiler and furnace parts 11 and; 2 are 'oined together in any suitable manner, e. g., y means of flanges 3. The boiler part consists of a desired number of sections '3 and end sections 26 and 27. Preferably, the arrangement of these sections is thesame as described in said patent .to- Thompson.

These sections are bounded by ribs, such: as

4, which extend around'the sectionsexcept where openings are provided, thus forming theiusual flues for gases between a ja ent sections. In the front atthe lower side portion of each boiler section, I} provide a plurality of louvres 5 openinginto the furnace part. .These louvres" are inclined towards the fire 6 to preventithe droppin of coal into the boiler sections and still a low free effected through side opening 12.

access of the. heated gases to the fines. ,As indicatedatBfthe top louvre is closed. WViththis louvre open, thedraft has a tend ency I to short-circuit therethroughl back to the reen coalbed; 9. Furthermore, with a low uel supply in the furnace, this louvre, if open to draft, would tend to cool the heatin}; surface of the boiler. I

A, fluerib or baflle 10 projects outer rib4 of each boiler section ata int near the top louvre 5. Theend of ha .10

is curved down, preferably below the lowermost louvre. The upper partof the-baffle 10 extends substantially in a horizontal line soas to provide a largeenclosure back of the louvres in whicl1',,by the curved lip of the battle, a Whirlpool actionof the gases is caused to take place. The horizontal art of haflle10may be cleanedfrom the -si e of the boiler throughopeningll. 1 The end of bafiie 1.0 is so shaped that no soot will do posit thereon, but will fall pastit to the bottom'of the flue where the cleaning mayfbe he openings 11 and 12 are, of course, covered with removable iron plateson theside 12 of the boiler (not shown). .1 1 h Above the 10 a baths 131 projects from the rib 4; Thebafile 13 is upwardly inclined so as to direct the gases of com: bustion in. acurved path .towards the flue outlet .14. The even circulation'oftthe gases towards this point isaidedalso by the sloping contourof the. lower/apart of the flue, which reventsthe formation of vdead pockets.v T e air-chambers 15 and "16 formed between the slopingpart of rib 4 and the outer casing of theboiler 1, serve also to heat insulate the uses flowing through the lower part of the ue. Furthermore, the inclined surfaces tendto concentrate the-soot at: the bottom of the flue where the cleaning: may

provided lZOyIWhlCh access may be had from thethrough the side of the boilenf The openings 11, 12 and17 serve also aspassageways between the flues for the gases of combustion. The outlet14, which'is large enough to serve a'number of flues, communicates integral extensions of t e with chimney flue 18 under the control of the usual damper 19 provided in the outlet collar 20.

The usual connections, including hubs 21 and 22, are provided for permitting the free internal circulation of steam and water in all the boiler sections which are suitably joined together by means offlan cs 23.

The furnace part 2 is enclose within a front wall 24, a top 25, side walls 35, and end sections 26 and 27 Fi 2) which are oiler end sections. The customar magazine charge door'28, slicer or clin'er door 29 and ash pit door 30 are provided in the top and front walls,flrespectively. The end SGCtlODS 26 and 27 extend only to'the grates of the furnace, and below that point the ash pit is covered by plates such as 31 in which air openings such as 32 are provided.

The arrangement of the furnace differs from the one described in said patent to Thompson mainly in the adjustin mechanisin of the water front 33. e water front acts as the front wall of the furnace magazine. Water outlet pipes 34 provided at each side of the upper end of water front 33 project through the furnace side walls. The waterfront 33 connected through pipes not shown) with the water space of the boiler 1, thus formin the circulatin connection of the boiler. ater is admitte to the water front 33 throu h pipe 36 rojectin through an elongate aperture 3 in the si e plate 35.

As shown in Fig. 3, if the number of boiler sections 3 is so great that more than one water front is required to fill up the front space of the furnace 2, then a second water front 33" is joined to 33 by means of flanges 70. lVater circulates from between these two waterfronts through pipes 71.

Thewater front 33 may be rotated around the pivot constituted by outlet pipes 34 to vary the adjustment of the furnace magazine for various types of coal. The forked end 3801? an arm 39 and the end of an arm 40 are pivotally held together by means of a pin 41 and bear against the water front 33. A horizontal rod 42, held by means of nuts 43 in the end plates 35, carries two sleeves 44 and 45 on which the ends of arms 39 and 40 are pivotally mounted at 46 and 47. The arms 39 and 40 provide a rigid support for the water front 33, relieving stress on the water pipes and, depending on the positioning of sleeves 44 and 45 on rod 42, the water front may be tilted back and forth by means of these arms. Set screws 48 and 49 projecting through the sleeves serve to maintain the latter in their desired positions. The screws 48 and 49 are accessible through the clinker door 29.

A plate 50, mounted on the water front 33,"extends to the top 25 of the. furnace.

The length of this plate is somewhat less than that of the furnace or water front. Owing to this arrangement air may freely circulate from the openings 32 through the grates 51, and then directly to'the ignited layer 6 of coal, and also infront of water compartment 33, on the two sides of plate 50 and down through the green coal 9. The air will thus carry with it any otherwise unconsumed products of combustion down throu h the most active part of the fire. The p ate 50 serves also to prevent coal from falling within the front part of the furnace.

The grate bars 51 are supported on bosses 52 projecting from the furnace front 24 and bosses 53 on the boiler sections. The front end of each grate bar is opposite an aperture 54 provided in the front plate 24, the apertures being normally covered by discs such as 55pivotally mounted on late 24 above of the grate 60 of plate 24, projects within slot 57, PEG? ventin the rotation of the grate bar. Since the loc ing means 59 is provided inside of the front late 24, the grate bars cannot unlocked t rou h inadvertence.

When it is esired to shake a grate bar, the disc 55 is pushed to oneside and the end of a handle is inserted through aperture 54. The end of handle 61 registers with cavity 58 in the grate bar and carries a lug 62 which registers with the slot 57. Therefore, as the handle end is pushed within cavity 58, the lug 62 ,will tilt latch 59 upward and out of the slot 57. The grate bar may now be shaken, lug 62 reventing the latch 59 from dropping in t e slot 57 (see Figs. 3 and 6). When the handle 61 is withdrawn, the latch 59 dropin the slot 57 and disc 54 will return to its normal position. I

While the invention is particularly ada ted for use in combination with the boi er herein disclosed, it will be obvious to those skilled in the art that some or all of its features are applicable also to other types of boilers and furnaces without departing from the spirit thereof.

What I claim is:

1. In a furnace, a fuel ma zine, a pivotall mounted water front t erein, a bar rigi y supported in said furnace, an arm having oneend engagingsaid water front, a pivotal connection for the other end of said arm slidably carried by said bar and means for holding said arm against the said water front for supporting the same.

2. In a furnace, a fuel magazine, a'water front in said magazine, a water outlet pipe ate bar end. N ormally Ill leading to said .water front and constituting a pivotal mounting for said water front, a bar rigidly supported in said furnace, two

pivotally interconnected arms at one end and engaging said Water front, pivotal mountings for the other ends of said arms slidably supported on said bar and adjustname to this specification, this 14th day of November, 1925.

CHARLES E. OLDAGRE.

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