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Juné 14, 1938. . H. A. ELLIS 2,120,589 TUYERE PLATE Filed May 16, 1934 2 Sheets-Sheet l_ , ' wrummmm I! h: ‘ _!/IIIIIIIIII"|"H|||||WI 108 ‘fl-29.1. 4 INVENTOR. @mphrgMQEZZ135, ATTORNEY. 2 ‘June 14, 1938. H. A. ELLIS 2,120,589 TUYERE PLATE ‘ Filed may 16, 1954v 2 Sheets—Sheet 2 4 INVENTOR QM 644/ , ATTORNEY. ' Patented June 14, 1938 2,129,589 ' UNITED STATES RATENT OFFICE 2,120,589 'I‘UYERE PLATE Humphrey A. Ellis, Philadelphia, Pa. Application May 16, 1934, Serial No. 725,950 9 Claims. The object of the invention broadly is to provide improvements in tuyere plates for underfed stokers and the like. More speci?cally, another object is to provide a (Cl. 110-44) that of the base sections, even tho greater ex pense be entailed. With this invention it is possible to provide a base section of such weight and height as to structure in which two or more nose or front sec e?iciently support several front sections, thereby tions are normally secured to a single rear or base section, any one or more of such front sections increasing the stability of the'unit and the use of many relatively thin front sections with even fewer relatively thick base sections, and conse being removable from and replaceable with re spect to a given base section, without necessitat 1 O ing the dislodgement, disconnection, or other dis turbance of said base section. A further object is to provide still more speci? cally the combination of a plate unit comprising a relatively heavy and inexpensive base section, 15 with two or more front sections formed of rela tively lighter weight and more expensive heat resisting alloy, each front section being char acterized by pairs of zig-zag air channels, the outermost discharge portions of the channels of 20 each pair operating to direct impinging jets of air from the plate section, until the edge portions of the said section disintegrate or burn away su?ciently to destroy such discharge portions, quently less danger of dislodgement of the former during normal operation of the stoker, together 10 with relatively wide laterally directed channels operative to direct a greater cross sectional vol ume of air at decreased speed or rate of flow, thru the deeper coal body normally above and in front of the side of tuyére plate units. 15 Fig. 1 is a bottom plan view of a tuyere plate unit comprising one embodiment of the invention; Fig. 2 is a side elevation of one such unit, upon which is superimposed the forward portion of a second such unit, the second being partially .20 broken away to show one of the means whereby ' one unit interengages the other; Fig. 3 is a central longitudinal vertical section after which the next adjacent portions of the 25 neighboring channels of adjacent pairs cooperate thru the unit of Fig. 1; to function as similar impinging air jets for the fuel upon the superposed series of tuyere plates, thereby making possible the use of each front section for thelongest period of time correspond 30 ing with the usable life of the casting, while it of Fig. 1; disintegrates, without losing or materially impair ing the improved method of air discharge. Still another object is to provide a construc tion, which insures a properly distributed air 35 supply by means of a maximum of positively ,di rected pairs of impinging jets. These jets being located in a multiple manner at the front where the ?re bed offers the least resistance, the side jets being of the full height and size to produce 40 greater air flow to supply suiiicient air in the gap between each row, where a greater air volume is required to equalize the distribution, also to pro vide the highest possible degree of turbulent air supply at all of the points of air discharge as 4 01 compared to the usual straight ?ow, which latter tends to result in spotty holes in the ?re bed. The resulting ?re bed upon a superposed series of these improved tuyere plates produces a much _ higher degree of heat, which is so intense as to cause the front section to gradually burn, blister, scale, crack, or otherwise wear away, in View of which fact it becomes even more imperative that the maintenance cost be minimized by providing front sections of greater heat resistant metal than Fig. 4 is a fragmentary section on the line 4-—4 25 ‘ Fig. 5 is a bottom plan view of the upper of the front or nose sections of the tuyere plate unit; Fig. 6 is a similar view of a fragmentary por tion of the same, showing approximately the 30 shape of its exposed forward edges, as the ad jacent portion of said section distintegrates under the in?uence of the intense heat of the fire nor mally adjacent thereto; and Fig. 7 is a side elevation of a pair of these tuyere 35 plate units one above the other, but the upper unit being tilted with respect to the lower to in dicate their relative positions, when it is desired to withdraw one or more of the plurality of front sections of the lower of such units. 40 Referring to the drawings, it is to be understood that either two or any greater number of nose or front sections for disposition in the ?re-bed may be supplied with a given rear or body section to form a tuyere unit, and that the following de- 45 scription of but two such nose or front sections for a tuyere unit is merely illustrative of the general construction, operation and interlocking manner of any desired plural number of such nose or front sections, both with respect to one 50 another or with respect to the supporting base section. Each rear or base plate section comprises a cen tral ‘substantially planular portion l, which is in general rectangular, with a substantially square- 55 2 2,120,589 cut rear edge portion 2, bevelled upon its under side and adjacent to which said plate is pro vided with preferably two or more apertures 3, for a purpose hereinafter described. The lateral ly opposite edge portions of said plate are pro vided with depending ?anges 4, the adjacent for war-d surfaces 5 of which are bevelled outward tioned abbreviated studs 28, adapted to extend downwardly and engage within correspondingly positioned apertures in the upper front section of the tuyére plate unit positioned next there beneath, and represented in the drawings by the apertures 29 in the upper front section l3. By ly to form in each case one side of a laterally this construction each tuyere base section is se cured against lateral movement with respect to angularly directed channel 6, the opposite side of which channel is de?ned by the substantially parallel surface ‘I of a depending stud, lug, or the corresponding section next therebeneath, while thru the medium of the series of pins 24 and 10 lugs 26 and 28, the front sections of each tuyere post 8, the laterally opposite and outwardly di plate unit are ?rst secured to bases of a super rected surface 9 of which post forms one side of a second channel II}, which latter is con?ned by posed series of units and to other adjacent front 15 surfaces ll , ll’ upon the adjacent sides of a pair spect to the units adjacent thereto, above and below the unit under consideration. of normally vertically aligned posts l2, l2’, car ried respectively by upper and lower detachable front sections l3, [3’, respectively, as hereinafter described. Substantially the central portion of 20 each plate I is provided with a depending post l4, having a transversely reduced extension l5, sections both above and below and also with re Each of said front sections comprises a for wardly directed convex edge surface 3|] of suitable cross section, which from long experience is well known in the art as gradually burning away or 20 deteriorating under the action of the intense heat providing one or more shoulders I6 and adapted to normally ?t and engage the sides of an elon of the ?re adjacent thereto, in such irregular shapes as those represented by the secondary gated aperture ll of the tuyere plate next below outlines 3i and 32 of Fig. 6. The under surfaces of the front sections are substantially similar to 25 one another, so that only one will be described in detail, and the same reference numerals where applicable are applied to the other, the upper front section of a normal pair being shown in Fig 5, while the lower front section is exposed to 30 view in Fig. 1. Spaced about the periphery and carried as in tegral extensions downwardly from the lower sur face of such front sections, is a series of spaced 25 the one under consideration, and with which such aperture each tuyere plate base section is pro vided. Each of the posts I4 is preferably rein forced with respect to its supporting plate I by means of a plurality of diagonally extending por 30 tions l8, integrally connected with both post and plate, and it will also be noted that the shoulders [6 are in a plane common with that of the lower most surfaces [9 of the lateral ?anges 4, so as to rest uniformly upon the tuyere plate next be 35 neath, unless the upper surface of the latter is other than planular, in which case the relative extension or positions of said shoulders and ?ange channel-forming lugs 33 and intervening lugs 35 34 of different shape from said ?rst set, the ad vide similar supporting ability. jacent yet spaced surfaces of each pair of said lugs 33 and 34 cooperating to form substantially Z-shaped channels 35, the outermost portions of While as above pointed out it is to be under stood that for each base section I there may be two or more front sections, only a pair of such sections l3 and 13' will be here described in de each pair of which channels are directed towards 40 each other, so that air or other gas passing there thru emerges therefrom in such a manner that the current from one channel of a pair impinges surfaces are altered accordingly, in order to pro tail, since beyond these two cooperating sections any additional number would comprise substan tially mere duplication or multiplication of those here mentioned speci?cally. Accordingly, the normally forward edge of the plate I is pro vided with one or more ?anges or lugs 20, of any desired shape and transverse width, in order to provide aligning means upon or against which normally rests the rear edge portion 2| of the upper front section l3, thereby limiting the rela tive downward movement of this front section with respect to said plate, while relative trans verse movement of said sections may be prevented by providing either of said sections, in this in stance the plate section itself, with an offset 22, adapted to. register with correspondingly shaped 00 recesses 23, in the adjacent edge portion of said front section. This upper front section I3 is ad ditionally provided with an integrally connected, centrally positioned, and downwardly extending pin 24, of sufficient length to extend downwardly 05 past and beneath the lower positioned front sec tion l3’ and into the correspondingly shaped ap erture 25 in the central forwardportion of the tuyére plate next therebeneath. The said upper front section is also provided preferably with two or more integral downwardly extending lugs or studs 26, adapted to engage within, but not to angularly against the current of the other of such channels, with the result that a swirling mo tion of said air is set up, as is previously described in my Patent No. 1,990,641, issued February 12, 1935. However, it has been found advantageous to provide these channels roughly of Z-shaped construction, so that as the outer edge portion of 50 the front sections burns away, as for instance to the line 3| in Fig. 6, there will remain the angu larly directed outer sections 36 of said channels to discharge impinging jets of air or the like. And still further, when an additional edge por 55 tion of said front section is burned away, as for instance to the line 32 in Fig. 6, the rearmost por tions 31 of pairs of said Z-shaped channels will continue to function as hereinbefore described. With this construction, it will be noted that 60 there is provided the maximum feasible number of channel pairs consistent with castings of this character for directing air for the purpose of aiding combustion into a bed of fuel upon an inclined series of tuyére plate units, both for 65 wardly and in divergent angular directions, while laterally of the said plates where the fuel bed is normally deeper, air flows thereinto with much greater volume but less force thru and from the relative!‘7 larger channels 6 and I6 located upon 70 the laterally opposite sides of said plates, where extend beyond correspondingly positioned aper the heat is by no means so intense under nor tures 21 in the rear portion of the lowermost mal conditions of operation. Consequently, as the radially outer edge portions of the front sec front section 13’, said lower front section in turn being provided with preferably similarly posi tions are gradually and progressively destroyed, 75 3 2,120,589 and it thereupon becomes necessary to replace said sections, either throughout or only in cer tain instances, all that is necessary in the latter said nose sections carrying projections cooperat ing in pairs and with the adjacent nose sections to form passages fed by air passing through said case is to pry one plate unit diagonally upwardly, as indicated in Fig. 7, so as to permit the release space, one of said nose sections being comple of the one or more front sections therebeneath to said base section, and the other nose section being attached to said ?rst nose section. 6. The combination of a tuyere plate unit, com prising a base section and a plurality of engaged nose sections, said base section providing in com 10 bination with an adjacent unit an air space and laterally directed channels, said nose sections each being provided with a series of projections adapted to form between themselves and adja cent nose sections divergently directed zig-zag 15 which are to be removed, after which new sec tions of like character can be readily substituted and operation of the stoker resumed. 10 Having thus described my invention what I claim as new and desire to secure by Letters Patent, is: l. A plurality of tuyére plate units, each unit comprising a base section, a detachable nose sec 15 tion normally adjacent thereto, a second nose section adjacent to and engaging said ?rst nose section, connecting means extending between said ?rst nose section and the base section of an adjacent unit and across said second nose sec 20 tion, connecting means also carried by said ?rst nose section and engaging said second nose sec tion, and connecting means carried by said sec 25 channels terminating in pairs having their side walls converging so that as the nose portions and projections burn away, adjacent channels of adjacent initial pairs successively provide sec ondary pairs of similarly directed passages hav 20 ing converging’ side Walls. ond nose section and engageable with a nose '7. A tuyere plate unit, comprising a nose por tion and a base portion provided with an air section of an adjacent unit. space, each of said portions being horizontally 2. A plurality of tuyére plate units, each unit tion normally adjacent thereto, a second nose section adjacent to and engaging said ?rst nose disposed, said nose portion being at one end of 25 and relatively short with respect to the base por tion and comprising a plurality of superposed interlocking sections, each having passages com section, connecting means extending between municating with said space. comprising a base section, a detachable nose sec so mentary with and normally positioned adjacent said ?rst nose section and the base section of an adjacent unit. connecting means also carried by said ?rst nose section and engaging said second nose section, and connecting means carried by said second nose section and engageable with a 35 nose section of an adjacent unit. 3. A tuyére plate, comprising a nose portion, provided with a series of projections adapted to form between them and in cooperation with an adjacent tuyere plate zig-zag channels, ad jacent pairs of channels terminating in angularly disposed sections comprising pairs of converg ing passages, and as the outer portions of said plate and projections burn away, adjacent chan nels of adjacent initial pairs successively provid ing secondary pairs of similarly directed converg ing passages. , 8. A tuyere plate unit comprising a horizontal 30 base section having an air space, superposed nose sections separate from, each other and from said base section stepped at their free ends and dis posed in continuation of one end of said base section, said nose sections being relatively short 35 with respect to the base section and disposed substantially between the extended planes of the top and bottom of the base section and provid ing air outlet passages at different elevations in communication with said space, and means for engaging vthe base section and nose sections to gether and to an adjacent unit for detachment by relative tilting of the base and nose sections. 9. A tuyere plate unit comprising a horizontal base section having an air space therein, a plu rality of superposed engaged nose sections dis 4. The combination of a tuyere plate unit com prising a base section and a plurality of nose posed substantially between the extended planes sections with an adjacent unit, said base section 50 having side walls coacting with the adjacent unit to de?ne an air space, said side walls being trav being in stepped relation at their free ends, said 46 of the top and bottom of the base section and ersed by laterally directed channels, each of said nose sections carrying projections cooperating nose sections: providing channels at different ele vations in communication with said space, said nose sections being relatively short with respect to the base section, one of said nose sections in pairs and with the adjacent nose sections to being ?tted to said base section throughout their form passages fed by air passing through said common transverse extent, and the other nose section engaging said main section in said space regions only, engaging means between said nose sections, and centrally positioned means on one of said nose sections adapted for engagement with the base section of the adjacent unit. 00 space. 5. The combination of a tuyére plate unit com prising a base section and a plurality of nose sections with an adjacent unit, said base sec tion having side walls coacting with the adjacent unit to de?ne an air space, said side walls being traversed by laterally directed channels, each of HUMPHREY A. ELLIS.