US1558215A - Stoker construction - Google Patents

Description

CE. ARAN STOKEB CONSTRUCTION Ulf/Y@ INVENTOR WTNESSES:

ATTORNEY structed of fabricated Patented oa. 2o, was.

UNITED STATES PATENT oFFicE..

erro Ansar', or nssING-TON, PENNSYLVANIA, AssrGNon ro wEsTINeI-Iousn ELECTRIC AND MANUFACTURING ooMrAN'Y, A CORPORATION or PENNSYLVANIA.

STOKER CONSTRUCTION.

' Application filed September 17, 1920. Serial 1ra-410,865. HE'

To all 'whom' t may concernf Be it known that I, O'r'ro ARAM, a citizen of the United States, and a lresident ofy Essington, in the county of Delaware and State of Pennsylvania, have invented a new and useful'lmprovement in' Stoker Construction, of which the following is a specilication. -1

This invention relates to the mechanical stoker's, and more particularly to stokers of the underfeed type wherein rows of tuyres and fuel-feeding retortsare alter` nately arranged in parallel relation and inclined from thel front wall of the furnacel to the dump grate. i

An object of the vinvention is to provide a grate surface composed of parts of simple and durablel construction which may be readily assembled or replaced without materially disturbing other parts of the grate.

Another object is to rovide retorts conrames uponl which detachable side and bottom plates are 'mounted, thereby obtaining the advantage 'of the superior strengthy and ,durability of structural iron frames over the usual cast iron retorts which tend to warp and crack under `the weight and heat of the tuyres and fuel bed usually-supported by the retorts. p By making the .side and bottom walls detachable and" sectional, they may be removed in case of. failure' without disturbing thetu yres or necessitating the removal of.Y they retorts.

.Another object is to provide a retort construction which securely ties the rear grate support or dump grate supporting casting to the upper castingfusually disposed beneath the front wall of the furnace. The lateral strains imposed upon the dump grate casting and support are quite severe and fref uently cause failure of the cast iron retort frames usually employed which are subjected to uneven temperatures and rapid temperature variations and are taxed to their full capacity in supporting the grates Aor tuyeres. lhe structm'al or fabricated frames are better adapted to withstand the temperature. variations without injury and do not warp out oi shape.

ri`iiese and other objects are attained by' a part hereof, wherein:

.through yastoker structure embodying my Figure ll-is a longitudinal Vertical section 4 invention; Fig. 2, a section on the line II- II of Flg. l showing details of the retort constructlon; F 1g. 3 a section similar to that of Fig. 2 showing a modified retort construction; Fig. 4 is a side elevation showing the rsupportmg members and side wall plates; Fig. 5 is a section on` line V-V of Fior. 4,- `nd Fig. Gis a section on line VI- of y eferring to the drawings, the Stoker includes a fuel feeding hopper which may be of any preferred construction. The discharge channel 6 of the hopper extends beneath the front Wall k7 of the furnace, and `fuel is forced through the channel by means of a reciprocating plunger 8'which maybe operated in any desired manner. A casting 9 which extends entirely across the width of the furnace serves to support and connect the fuel ret'orts which are arranged in spaced parallel relation across the width `of thel furnace. The hopper castings 5 are bolted or otherwise secured to the front casting 9, and the hoppers and front casting are supported upon an I-beaml 11 which is mounted upon any suitable foundation such as that indicatedat 12.

.Spaced from the front support and extending across the-furnace is a rear gratesupport casting'l mounted upon structural frames 14 which maybe mounted directly upon the foundations beneath the casting or supportedl by the side walls of the furnace. The rear casting 13 andthe front casting 9 are connected at spaced intervals by means of frames fabricated from commercial shapes. p

In the construction illustrated in Figure 2, each frame includes an upper tie member 15 and a lower tie member 16 formed of angle iron. rihe ends of the tie members are bolted securely to the castings 13 and 9 and form a connection, therefor, which. may expand and contract with variations in temperature without danger of failure. Side plates 17, which are formed in sections and which may be made either of cast or plate iron', are bolted to the upper and lower tie members and form the side walls of the retorts. Sectional bottom plates i8 are placed across the space between the two adjacent IGS frames and rest upon the tie members 16 to rectly upon the angle iron 15. It will be seen that the plates 17 may be replacedwithout disturbing the tu res.

The tuyres 19 extend rom a point adjacent the front wall of the furnace to the lower end of the grate and overlap a dump grate 21 which extends entirely across thel width of the grate and is pivoted to the castingl at 22. ach retort may 'be-provided with a secondary or auxiliary ram 26 which reciprocates in the lower lend of the retort adjacent the lower tuyeres 19 and which agitates the fuel` in the lower portion of the grate.v- The ram is connected to a driving means, not shown, by means of a connecting rod 27 which extends forwardly and projects through an upper casting.

While I have shown my invention in but one -form, it will-be obvious to those skilled inthe art lthat it is not so limited, but is susceptible of various changes and modifications, without departing from the` spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or'as are specifically set forth in the appended claims.

, What I claim is 1. An underfeed stocker having a combustion grate formedv of parallel rows of tuyres extending longitudinally of thel furnace and retorts between them, front and rear supports for the said grate, and a frame comprising structural beam members-connecting the said sup orts and supporting the tuyres and walls of) the retorts.

2. An underfeed stoker having a combustion grate formed of alternately disposed tuyres and retorts, front and rear supports for Athe said grate, and a frame comprising structural beam members connecting the said supports' and supporting'y the tuyres and walls of the retorts.

3. An underfeed stoker having a combustion grate formed of alternately disposed tuyres and retorts, front and rear supports for the said grate, and a wrought metal 'frame comprising structural beam members connecting the said supports and supporting thetuyres and walls of the retorts.

L1. An underfeed Stoker construction comprising a plurality ot retorts arranged in spaced parallel relation, each comprising upper and lower pairs of structural frame members, detachable side plates secured to each upper frame member and cooperating with the Acorresponding lower frame meniber and detachable bottom plates connecting vthe lower` frame members, the said plates forming side and bottom walls respectively of the retorts, and grate r tuyres mounted on adjacent upper'frame members of the retorts and bridging the space between the retorts.

5. In an under-feed stoker having "a combustion grate formed of alternately disposed tuyres and retorts, front and rear supports for the grate, a plurality of tie members extending between and connected to said supports, lates forming the side'and bottom walls ogsaid retorts secured to said tie members, and tuyres bridging the spaces between and supported upon-saidretorts.

6. In an' underfeed stokerhaving a combustion grate formed of alternately disposed tuyres and retorts, front and rear supports for the grate, .a plurality of tie members extending between and connected to said supports, and so disposed relatively to each other as to determine the cross sectional dimensions and spacing of said retorts, plates secured to said tie members to form side and bottom walls of Vsaid retorts and tuyres Jbridging the spaces between and supported upon said retorts.

7. In an underfeed stoker having a combustion grate-formed of alternately disposed tuyres and retorts, front and rear supports for the grate, an upper series of tie mem- 100 bers and a corresponding lower series of tie members extending between and connected to said supports, plates secured to tie members to form side and bottom walls of spaced retorts and tuyres bridging the spaces between and supported upon said retorts.

8. In an underfeed Stoker having a combustion grate formed of alternatelydisposed tuyres and'retorts, front and rear supports for the grate, a plurality of pairs of upper tie members and a plurality of corresponding pairs of lower` tie members extending 'between and. connected to .said supports,

plates secured to each up er-and corresponding lower tie .member to' orm=side walls and 115 plates secured to the lower tie members to form bottom walls of the retorts, and tuyres bridging the spaces between and Supported upon said retorts.

9. In an underfeed stoker having a combustion grate 'formed of l spaced rows of tuyres extending longitudinally of the furnace and retorts between said rows of tuyres, a unit retort for said Stoker comprising a plurality of pairs of longitudinally 325 extending tie members, and detachable vplates secured to said tie members to .forni side and bottom walls of the retorts.

10, In an underfeed Stoker having a coin- A bustion grate formed of spaced rows of eoV tuyres extending longitudinally of the furnace and retorts between said rows of tuyres, a unit retort `for said Stoker comprising a pair of upper and a pair of lower longitudinally extendin tie members, and plates secured ou said tie members to form side and bottom walls of the retort.

"11. An underfeed stoker'construction comprising a plurality of retorts arranged in spaced parallel relation, each comprising'upper and lower pairs of structural frame members, detachable sectional side plates se-I Y cured between each upper and the corresponding lower member and detachable sectional bottom plates connectin A frame members, the said plates Forming side and bottomwalls respectively of said retorts and tuyres mounted on adjacent upper frame members of the retorts and bridging the spacebetween them.

In testimony whereof, I have hereunto subscribed my name this 13th day of September, 1920.

' 'l OTTO ARAM.

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