US2245136A - Grate and pallet construction - Google Patents

Description

www afname/f E. W. SHALLOCK GRATE AND PALLET CONSTRUCTION Fiied July 5;, 1.940

. Il JQ )46 fan* June 10, 1941.

June' 1o, 1941. E, w, sHA'LLK 2,245,136

GRATE AND PALLET CONSTRUCTION Filed July 5, 1940 2 Sheets-Sheet 2 'www waz/aff Patented June 10, 1941 2,245,136 GRATE AND PALLET CONSTRUCTION" Edward W. Shallock, Chicago, Ill., assigner to American Ore Reclamation Company, Chicago, Ill., a corporation of New York Application July 1940, Serial No. 343,999

(Cl. 26S- 21) 4 Claims.

y The present invention relates to an improvement in grate and pallet structures, suitable, particularly, 'for use, in sintering machines.

` Sintering machinesin use today are generally of the4 continuous type and comprise a train of separate pallets which are adapted to be moved along an endless track having an upper run and a lower run. The pallets are provided `from which the material tov be sintered is discharged onto the grates. The pallets then pass beneath ignition means and the material upon `the grates is ignited, after which combustion is propagated throughout the material by causing air to flow therethrough. The grates are subject to frequently become Warped or even may disintegrate, thus rendering themunsatisfactory for further use. The pallets referred to may be six feet or more in width and it is expensive to provide a single continuous grate member for a pallet. It frequently happens that only a small area of the grate may be warped or burned out yet, if but a single grate member were used, that would render it necessary to provide an entire new grate member. Such a construction is also objectionable in that the single grate members are difficult to handle. It is known, in order to avoid the objections noted, to provide pallets with grates formed in sections which may be individually removed from the pallet when unfit for further use.

The present invention isdirected to a pallet intense heat and v having a sectional grate in which the parts are A "so constructed and related that the grate sections may be made much smaller than heretofore and may be removed and replaced with expedition and facility. More specifically, the grate comprises a plurality of intermediate sections confined between side sections, the pallet frame and the grate sections having interlocking means securing them together while permitting ready removal and replacement of the grate sections by slight sidewise movement of selected ones thereof. Further objects and ladvantages wil appear from the detail description.

Y In the drawings:

Figure 1 is a plan view of one embodiment of a pallet and grate structure made in accordance with the principles of the present invention, a portion of the intermediate frame of the pallet and severalv of the intermediate grate sections being omitted for clarity of illustration;

Figure 2 is a sectional view taken substantially on line 2 2 of Figure 1, on an enlarged scale;

Figure 3 is a plan view of one of the intermediate grate sections of the embodiment of the invention illustrated in Figure 2;

Figure 4 isa sectional view taken substantially on line 4-4 of Figure 2;

' Figure 5 is a sectional view taken substantially on line 5-5 of Figure 2;

Figure 6 is a perspective view of a portion of the pallet frame of the embodiment of the invention shown in Figures 1 and 2;

Figure 7 is a perspective view of a portion of a modified form of pallet frame;

Figure 8 is a sectional view taken substantially online 8--8 of Figure 7 showing a modified forni of grate 'mounted in the pallet frame;

Figure 9 is a sectional view taken substantially on line 9-9 of Figure 8; and 4Figure 10.is a plan view of the pin for retaining the side grate sections .upon the pallet frame.

Referring now to the embodiment of my invention shown in`Figures 1 through 5, the pallet comprises a generally rectangular metallic frame B, which in use is disposed transversely of the sintering machine .and travels lengthwise thereof, this frame having end bars 1 connected by side bars 8. Preferably, a pair of centrally spaced reinforcing ribs 9 extend transversely of the pallet frame, parallel to each other and to the end bars 1 and are connectedto the side bars 8. 'The end bars 1 and reinforcing ribs 9 may be provided with connecting Webs I0 for imparting the desired strength to the pallet frame. The side bars 8 are each provided with depending brackets I2 which may be reinforced upon the pallet frame by means of suitable webs I3. The brackets I2 are adapted to receive stub shafts I4 upon which are mounted flanged rollers or wheels I5, which travel upon the track of the sintering machine. Secured to the upper edge of each side bar 8, as by riveting, is a side plate I1. The manner Vof supporting or driving the pallet frame members forms no part of ,the present invention, it being understood that lany suitable means may be employed for that purpose. The centrally disposed reinforcing ribs 9 are provided with inwardly extending aligned pairs of projections I9 for a purpose to be hereinafter referred to.

A grate 20 is mounted in the pallet frame for supporting the material ,to be sintered and consistsl of a plurality of intermedi-ate grate sections 2I anda pair of side grate sections 22. In one specific application of my invention, in

which the pallet frame has a'length of 72", I provide seven intermediate grate sections 2| each 8" long and a pair of side grate sections 22 also each 8" long, making a sectionalized grate of nine separate sections any onev of which may readily be removed and replaced as desired or necessary. The' grate sections 2| and 22,

preferably, each comprises a single integral casty and 22 are provided with suitable lugs 21 which,

when the grate sections 2| and 22 are assembled upon therpallet frame, define slots 28 between each of the several grate sections 2| and 22. It will be understood, however, that the invention is not limited to a grate having openings or slots of the type shown since the grate sections may be formed with frusta-conical openings as disclosed in my Patent No. 1,722,344, dated July 30, 1929, or in any other suitable manner.

Each intermediate grate section 2| is provided at its sides with depending downwardly enlarged heads 29 which are lconnected by a tranversely extending reinforcing rib 3|). Each of the heads 23 has, at its lower end, outwardly extending ear portions. 3| which define securing elements for engaging beneath the inwardly extending projections I9 of ribs 9 in interlocking relation Each of the side grate sections 22 isA thereto. provided at its inner` side with a depending head 32 having outwardly extending ear portions 33, and, at its outer side, with a pair of upwardly A extending spaced lugs 3l. A dentral reinforcing rib 35 extends from head 32 of each side grate section 22 to the outer side of the latter and is t-here rounded to enable insertion of the side sections into the pallet frame in close contact with the sides thereof and the intermediate grate sections.

The inwardly extending aligned pairs of projections I9 of the central ribs 9 of the pallet frame are so arranged that their center lines are in the planes of the contacting sides of adjacent grate sections, when the latter are assembled in the pallet frame. The intermediate grate sections 2| are placed in the pallet frame by insertlng heads 29 between two adjacent pairs of projections I 9 and then moving the grate section 2| a short distance transversely ofthe pallet frame into position with ears 3| disposed beneath projections I9. The side grate sections 22 may then be positioned in the pallet frame, with the inner side of each abutting an intermediate grate section 2|, head 32 disposed with the ears 33 thereof beneath the adjacent end pair of projections I9. T-shaped pins 36 are inserted through suitable openings in the side plates I1 and bosses 31 at the upper portions of the side bars 3, with the heads of the pins disposed between the lugs 34 at the outer side of each of the side grate sections. A cotter pin 33 is inserted through the outer end oi' each pin 36 to retain it in position effective to lock the assoelated grate section upon the pallet frame.

'Ihe grate sections are supported by the upper edges of the side walls 1, end walls 3 and the centrally disposed ribs 9 and are effectively locked in assembled position in the pallet frame. If an intermediate gratesection 2| becomes warped or burned out, it may readily be removed and retion 22 and then moving the intermediate grate section slightly transversely of the pallet frame to disengage ears 3| from beneath projections I9. The grate section may then be lifted out and a new section inserted and positioned in locked relation to the pallet frame, the side grate section then being replaced.

Referring now to Figures 7 through 9, I have disclosed a construction in which the grate 20' comprises sections in the form of individua( grate bars 40. These individual grate bars correspond substantially to a single bar of the grate sections 2| or 22 already described, and are provided at their outer sides with spacing lugs 21'.

Lugs 21 space bars 40 apart, when assembled in the pallet frame, to provide slots 28' therebetween. Each bar 40 is provided with a depending head 29 having ears 3| for engaging the pallet frame, as will presently appear.

The centrally disposed parallel ribs 9' of the pallet frame (Figures '7 and 8) are provided with substantially continuous inwardly extending iianges 4| -attheir upper edges, with rectangular openings 42 at both sides of the ribs corresponding substantially to the conguration and preferably slightly larger than the depending heads 29 of the individual grate bars' 40. Each side bar is retained in position by means of the headed pin 36', the head of which seats upon the upper surface of the bar 40 and the stem portion of which extends through the opening in the side plate Il and bosses 31 of the side bar 8', the

pin 36 being retained in position by the cotter pin 38. v

In order to replace a grate bar 40, the latter may'be broken and removed, the remaining bars moved up one space from one side of the pallet Y understood, however, that within the broader ,by any selected ones of such bars or ribs, the

securing elements of the grate bars or sections being appropriately'disposed for cooperation with such flanges o'r projections. For example, the end bars l or 1 of the 'pallet frame, which end bars may be considered as reinforcing ribs. may be provided with inwardly extending projections 9 or flanges 4|, and the grate sections or bars may be provided with elements disposed to engage beneath such projections or flanges. This variation will be clear from the drawings and the foregoing description, and requires no further description or illustration here.

While I have shown and described what Iconsider to be the preferred embodiments of my invention, it will be understood that I do not intend to be limited thereto since various modifications may be made without departing from the y spirit andV scope of the invention. y

placed simply by removing either side grate sec- I claim:

l.l In combination, a pallet frame having two spaced parallel reinforcing ribs provided with opposed inwardly extending projections, a plurality of grate sections seating on said frame and extending in the direction of travel thereof, said grate sections being provided with depending securing members defining locking elements disposed to engage beneath said projections, the latter terminating short of opposite sides of said frame a suicient distance to permit positioning of said grate sections by insertion of said securing members into said frame at either of said opposite sides thereof, selectively. by moving said grate sections along said frame from either side thereoftoward the opposite side thereof, a side grate section seating on said frame at each of said opposite sides confined thereby against sidewise movement and in sidewise contact with adjacent intermediate grate sections effective for holding said intermediate sections in sidewise contact with said locking elements beneath said projections, and means for restraining each of said side sections against movement away from said'fr'ame.

2. In combination, a pallet frame having spaced transversely extending reinforcing ribs 'provided with a plurality of spaced lpairs of opposed locking lugs, a plurality of grate sections seating o n said frame and extending in the direction of travel thereof, said grate sections being vin sidewise contact with each other and each being provided with depending securing members defining locking elements engaging beneath said lugs, the pair of lugs nearest one side of said frame being spaced therefrom asuiiicient distance to permit positioning of said grate sections by insertion of said securing members into said -restraining the outer side of said side section grate sections.

against movement away from said frame, said locking lugs and said securing elements being arranged whereby upon removal of said side section said grate sections may be removed from said frame by lateral movement thereof toward said one side a. distance substantially less than the width of one of said grate sections.

3. In combination, a pallet frame having two transversely extending ribs provided with inwardly projecting flanges, a plurality of sidewise contacting grate sections seating on said frame and extending in the direction of travel thereof, said-grate sections having depending securing members insertible into said frame between said flanges and defining locking elements engageable beneath said flanges, said inwardly projecting fianges terminating-short of the side walls of said frame a suflicient distance to permit positioning .of said grate sections in said frame from either side thereof, and means restraining the grate sections adjacent the side walls of said frame `frame and extending in the direction of travel thereof, said intermediate grate sections having depending securing members defining locking elements engaging beneath said lugs, a pair of side grate sections seating on said frame at the sides thereof, and means restraining said side sections against movement away from said frame, said side grate sections each contacting the sides of the outer intermediate grate sections to prevent lateral movement thereof relative to the direction of travel of said pallet frame, said intermediate grate sections being adapted to .be removed from said frame by limited lateral movement relative to the direction of travel of said pallet frame to disengage said securing members from said lugs upon removal of either of said side EDWARD W SHALLOCK.

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