Патент USA US2403857код для вставки
July 9, 1,946. ì ¿_ R’GRAVES> 2,403,857 AGRATL -BEARER BAR Filëu April s, 1941 .Hy 04ML/ AT ORNEY 2,403,857 Patented July 9, `l94ï6Y PATENT --oI-‘Flpcrspi-i ` Graves, Yonkers, N. Y., assîgnor to The >Standard _ Stoker company,` Incorporated, New . Y' f fYói’ljiQlfIrzÍY.; acorporation of Delaware ’" ' - Applieationnprils,1941,seria1NQ.ss7.455 ¿ " ivv 5 claires., (cries-its) ~ wardly beneath Athe ñreboxbackwall 5D into the 1 'My invention relates to furnace grates for lower portion of the iirebox below the level of thegrate 53. ~An elbow shaped-upturned conduit v steam boiler’furnaces and particularly toV that type of grate in which removable grate sections are provided. » An object of my invention is to provide a novel l, and advantageous. grate supporting construction , 55 communicatesnrwith the'forward end of the conduit 54 and’extends forwardly yand upwardly ' to aípoint above theV level‘of thegrate 53 and adjacentv the ñrebox vfronti-wall l5 l . ,. Suitable con and arrangementfor'a furnace fired by a Stoker ` of the type in Which the fuel conduit for at least a portion of its length extends longitudinally of the furnace beneath the furnace grate. More veying mechanism, well knownin the art, carries the coal 'forwardly from theftender (not shown) 10 speciñcrally the invention contemplates the pro vision of a combined stoker conduit and grate to the conduit 54, through which conduit the coal is advanced by a screw conveyor 56. The coal is forced through the conduit 55 and upon `emerging from the discharge end thereof is pro bearer bar in a stoker fired furnace of` the type just described. Still more specifically the inven 15 jected rearwardly across >the firing table 58 onto the grate 53, by suitable means, as by a blast of tion contemplates the'provision of a combined Stoker conduit and grate bearer bar frame with , nuid under pressure issuing from a jet head 51 disposed‘ at the upper forward end of the con removable grate trunnion bearing units. Other objects and advantages of the invention The stoker conduitf54 is provided Awith a super y, residing in the construction, combination and ar structure 5,9v including a longitudinally extend rangement of parts, will be apparent, to those ing horizontal plate 60 spaced above the conduit familiar with the art, from the following de duit l ' ' « Y v 54 and joined with the .conduit proper bya plu- Y scription when read in connection with >the, ac companying drawing, in which 55. rality ofV spaced transversely extending webs 6I. , other pair of webs 6l are joined by a pair Fig. 1 is longitudinal vertical central section 25 Every of laterally spaced longitudinally extending Webs through a locomotive i'lrebox, in which the cen 62` that also join the plate 60 withv the conduit ter grate bearer bar is formed as a part of a Stoker conduit; the Stoker and center grate bearer bar being shown in elevation Withrparts broken away and shown in section; . l Fig. 2 is a sectional `view taken on the line 2-2 of Fig. 1 with the grate trunnion removed. Fig. 3 is a sectional view Ltaken on the line 3-3 of Fig. 1;.and ' y proper. ` . . ï ` l The plate 60 is provided throughout its length with aplurality of equally spaced longitudinally 30 elongated slots> 63'opening into the pockets 64 formed by the transverse and longitudinal webs 6I >and 62.` Trunnion bearing units 65 are pro videdY on theirfunder sides with the depending Fig. 4 is a sectional View taken on the line 4-4 35 'longitudinally elongated tongues 66 which are . .arranged to be received in the pockets 64 when AofF'igl.. 7,.. the trunnion bearing units 65 are seated on the The invention has been shown V'and describedl ' plate _60. The walls 6|, 62 of the pockets 64 pre- ` as applied to a locomotive ñrebox but it will be apparent to those familiar to the art, that the vent any substantial longitudinal,` lateral and rotational movement of the trunnion bearing novel grate -bearer bar ’construction is " equally 40 >units 65. , The trunnion bearing units 65 are pro applicable to various types of marine fireboxes and other boiler ñreboxes; ` In the drawing, a locomotive ñrebox of conven tional form is designated by the’numeral 49 and :vided in their upper surfacefwith thelaterallyy Yextending recessed bearings 61 in which are jour rnaled* the grate trunnions 68. ìThe elbow-shaped conduit 55, Which is sup# it is defined by the hollow rear >wall 5D, the hollow 45 by a bracket Y ’ front wall 5I, hollow side walls (not shown), and _ ported from the boiler, mud ring~63 16, is 'provided on each side with'a plurality of the grate 53. The gratev53 comprises a plurality laterally extending Webs 1I. To the outer ends of of grate sections, indicated by the numerals 48 in Figure 4, provided with grate trunnions 68,; ' vthe Webs 1l are secured, in any suitable manner, longitudinally extending plates 12, to which in permitting rocking movement of the-grate sec turn longitudinally extending brackets 13 are suit tions 48 by suitable means, not shown. A Stoker, ably secured. The brackets 13 are arranged with representedgenerally by the numeral 52, delivers the plates Y'l2 to form longitudinally extending fuel to the ñrebox and scatters it over the»y grooves innwhich the tongues 14 of the trunnion grate 53. ~ ' l The Stoker includes a conduit 54 Vextending for bearing units 15 are received. The trunnion bear 2,403,857 3 ing units 15 are similar to the units 65 split in half vertically along theirv longitudinal center lines, as best shown in Fig. 4. Recessed bearings ‘I6 in the trunnion bearing units "I5 are arranged to receive the grate trunnions 68. A protecting grate 18 embraces the upper end of the conduit 55 and is seated on the plates 12. 4 3. The combination rin a ñrebox, of a stoker conduit extending longitudinally thereof, a longi tudinally extending horizontal plate spaced above and formed With said conduit, said plate being formed with a plurality of slots spaced lengthwise of said plate, and separable grate trunnion bear ing members having depending tongues arranged The protecting grate ‘I8 may be of any desirable to be received in said slots upon seating said bear form and provides protection for the conduit 55 ing members on said plate.-y , from the intense heat of the ñrebox. The remov-VV 10. 4. The combination in a ñrebox, of an integral able trunnion bearing units 55 and 'l5 are prefer Vcast steel stoker conduit and grate bearer bar ably made of cast iron, while the stoker conduit is frame extending longitudinally of the firebox and preferably made of steel. a plurality of separable cast iron grate trunnion I claim: Abearing members supported on said frame. l. As a new article of manufacture, a-cornbined> 15 l5. kThe >combination in a ñrebox, of a stoker stoker conduit» and grate bearer bar 'frame com prising in an integral structure a tubular stoker conduit, a plate spaced from and extending lengthwise of said stoker conduit and ribs con conduit extending longitudinally thereof, a longi tudinally extending horizontal plate spaced above and `formed Withsaid conduit, said plate being formed with a plurality .of slots spaced lengthwise necting said `plate and stoker conduit, said plate 20 of said plate, and separable grater trunnion bear ing ‘members having depending tongues arranged being formed with a plurality of Vslots spaced lengthwise of said plate. » to be received in said slots upon seating said bear ing members on said plate, each of said bearing conduit extending longitudinally thereof, a longi members being provided in its upper surface with tudinally extending horizontal plate spaced above 25 a transversely extending recess adapted to receive and formed with said conduit, and a plurality of a grate bar trunnion. 2. The combination in a ñrebox, of a stoker separable grate trunnion bearing members ysup ported on said plate, said members being disposed in end to end abutting relation.' f JOHN R. GRAVES.