US1916370A - Checker support - Google Patents

Description

July 4, 1933. J C, HAYES, JR, ET AL 1,916,370

CHECKER SUPPORT` Filed March 6, 1931 z'sne'ets-sheet 1 Il KMK;

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July 4, 1933. J. HAYES, JR., E.- AL V1,916,370

cHEcKER SUPPORTv Filed March 6, 1931 2 Sheets-Sheet 2 in hot blast vention to provide an improved type of sup-A Patented July 4, 19h33 UNITED STATES PA-'reu'r 'OFFICE :rome c. imams, n... Nn cnam-.Es e. meirmw, Ianni ENGINEERING conramr, orcmcaeo,

or emesso, more. Assienons 'ro immers, a concurren or mit SUPPORT Application lcd Iarcli 6, 1931. Serial lo. 520,727.

to be noted that the temperature at or near the point of Contact between brick and metal stoves is subject to enormous thestove is changed from gas burning to air heating. This difference in the coefficient o f expansion between fire brick and metal causes creepage of the metal area from the'brick at the supporting joints with consequent failure and deterioration of the lowermost checkers.

It is therefore an object of the present inchange every time porting means for supporting columns o checker work, which will obviate any diiculties incident to the iiuctuation in the dimensions of the various checker-brick.v

Anotherobjectv is to provide supporting' means for columns of checker-brick upon which the same may be positioned irrespective of the location of the main metallic supporting columns.

More specifically an object of the invention is the provision of the metallic shoes orlocation under the'` columns of checker-brick and which, by reason of their support upon a grating, will function to prevent any possibility of the brick spalling at the supporting points where the load is concentrated.

A still further object is vthe provision of a metallic shoeV for supporting a column of Y checker brick and metallic grating for supporting in turn the latter, whereby the construction permits an unobstructed passage of the gases and air and wherein the line of cleavage due to variations in .temperature will be between the metallic grating and the metallic shoe.

A still urtherobject is to 'provide a metallic `shoe for supporting the checker-brick which may be used indiscriminately with checkers of diierent .With these and various other objects in view, the invention may consist of' certain lnovel features of construction and operation, as will more fully described and particu-- larly pointed out in the specification, drawings and claims appended hereto.

In the drawings, whi' h illustrate an embodiment ofthe device and wherein like reference characters are used to designate like Figure 1 is a .sectional view taken transversely through a liot blast 'stove showing the supporting means for the checkersbrick as constructed in accordance with the present invention;

" Figure 2 is a fragmentary sectional viewA showing a plurality of supporting columns supporting the checker-brick;

igure 3 is a view similar to Figure 2 but taken at right angles thereto ;'Y

Figure 4 is an enlarged plan view showing the positioning of the metallic shoes upon the grating;

Figure 5 is a plan View of a metallic shoe;

Figure 6 is a plan view of a metallic shoe of dierent design; Y

Figure 7 is a sectional view taken through the center of the same;

Fi re 8 is a plan view of a metallic shoe ofs different design;

Figure 9 is a sectional view taken substantially through the center of the same;

Figure 10 is a plan view showing a metallic shoe substantially square in contour; and

Figure 11 is a sectional view taken substantially through the center of the same.

Referring to Figure 1 lof the drawings a hot blast stove is-disclosed of' circular cross section having an outer wall 10 of steel or the like, within which is a brick lining l1 of ordinary construction; An .interior wall 12 formed integrally with or suitably joined to the lining 11 provides a vertical passageway 13, extending the length of the structure and whichv communicates with a gas 4burner 14 and a hot air outlet 15. .Also communicating in a similar manner with the second passageway formed Within the stove by the interior wall12 are chimne valves 16, inspection door 17 and cold air in et 18. All of the above is common and well known structure as is also the particular function of each in the operation of the complete device and therefore more detailed description of the same is not considered necessary.

The second passageway is filled with heataccumulating and heat-exchanging brick work, the same extending from points slightly above the apertures 16 and 18 to substantially the to of the structure. When the stove is gas red the hot gases enter the top of the structure and are conducted through the checker work, to be later described, whereby the same accumulate heat, the gases finally being discharged through openlngs in the bottom of the stove. In reverse operation the cold blast is introduced through opening 18 and is directed up through the checker work whereupon the same transfer their heat to the air after whlch the blast is conducted down through passageway 13 and is discharged through the hot air outlet 15, all of which is well known operation of stoves with which the present invention is concerned. Particularly the present invention is concerned with means for supporting the checker-brick in a manner to obviate the difficulties heretofore encountered bv reason of the uncertainty in the dimensions of the same and their rapid deterioration due to the sudden changes in temperature to which they are subjected. As shown in Fig- 40 ures 2 and 3 the main suppprting means comprise supporting columns 20 located upon base 21 of the stove and provided at their upper end with supporting plates 22 having upwardly directed anges 23, the plates being 45 rigidly secured to the columns by means of angle plates 24. Adapted to span the distance between adjacent columns are a plurality of girders 25 rectangular in cross section and held in position on the supporting plates 50 22 by reason of the flanges 23. The girders o way described can be 25 are preferably made of a length equal to the distance between columns so that adjacent girders abut each other at points centrally of the supporting plates 22.

Positioned upon the girders 25 are a plurality of grid plates 26, the majority of which are formed in a parallelogram shape, the remaining having a single arcuate edge so that the entire area forming the second passagecovered by the grid plates. More particularly shown in Figure 4 the grid plates 26 comprise diagonal members 27 and 28 which intersect each other to form a diamond shaped mesh. Also it is c desirable that the material forming the grid plates be a heat-resisting alloy, such as a chromium nickel aluminum alloy.

Forming the sup orting means proper for the tiers of checkerrick 30 are metallic shoes 31 preferably formed of cast iron hexjagonal in shape so that the same has substantially the same shape as the individual checkers forming the heat-accumulating and heatexchanging columns 30. Each metallic shoe, as are also the individual checkers, are provided with a plurality of vertical passages 32 and exterior groove 33, the latter forming passages for conducting the gases and air when the shoes and checkers are arranged as show in Figure 4. The metallic shoes 31 are provided with a bottom recess 34 and a projection 35 o n its upper surface, the same being circular in contour anddisposed centrally of the checker. The lowermost checkers are provided with cavities for receiving the projection 35, whereby the integrity of the columns are maintaine notwithstanding the wide and sudden variations in temperature to which the metallic shoes and checkers are subjected.

Figures 6, 8 and l() disclose modified forms of metallic shoes 131 having projections 135 provided thereon for the purpose described. The shoes are for use with various forms of checkers commonly employed in hot blast stoves. The shoes are preferably made slightly smaller than the checkers with which they are adapted to be associated, providing just sufficient surface for either over-sized or under-sized checkers.

The construction above functions to overcome many disadvantages. The difference in the coeiicient of expansion between the tire brick and metal causes creepage of the metal away vfrom the brick at the supporting points unless some arrangement, such as the metal shoe disclosed in the present invention, is incorporated. The shoe bein recessed into the fire brick column will ollow the brick in any movement due to temperature changes and the line of cleavage will be between the metal shoe and the metal support j thus preventing any disintegration of the brick. Also the underlying supporting columns can be designed in advance and the grating allows the shoes to be positioned without regard to location of the columns supporting the grate. The brick ma then laid up as closely or as loosely as esired to the end that full advantage may be taken of the space available for laying brick and avoiding any crowding or unnecessary cutting where the brick tends to run consistently over specified dimensions.

It is to be understood that we do not wish to be limited by the exact embodiment of the l device shown, which ismerely by way of illustration and not limitation, as various and other forms of the device will of course be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

We claim: A

1. Supporting means for use in hotblast stoves for supporting checker-brick, comprising in combination main supporting columns, a metallic grating supported thereby, and metallic shoes supported by said gratmg.

2. Supporting means for use in hot blast stoves for supporting checker-brick, comprising in combination main supporting columns, a metallic grating supported thereby, and metallic shoes supported by said grating, each of said shoes forming a sup.- port for a column of checker-brick.

3. Supporting means for use in hot blast stoves, comprising main supporting columns, a metallic grating sup-ported thereby, and metallic shoes positioned on said grating and supporting a column of checker-brick.

4. Supporting means for supporting checker-brick comprising a plurality of spaced supporting columns, `a plurality of grid plates supported thereby, and shoes positioned on said grid plates, said shoes having located thereon a column of checkerbrick.

5. Supporting means checker-brick comprising a plurality of grid plates, metal shoes supported thereon, andr a column of checker-brick positioned on each of said shoes, said shoes having interiitting engagement with said brick.

6. A support for checker-brick comprising a plurality of supporte-d gridplates, a plurality of metal shoes supported thereby and adapted to have lateral movement thereon, and a column of checkers supported by each shoe.

for supporting 7. A support for checker-brick comprising a plurality of supported grid plates, a plurality of metal shoes supported thereby and adapted to have lateral movementthereon, and a column of checkers supported by each shoe, said shoes having means interitting with said checkers. p

8. A support for a column of checker-brick comprising a supported grid plate, a metal shoe supported thereby and adapted to have lateral movement thereon, said shoe supporting a plurality of checkers, and means vided on one surface thereof for interfitting engagement with said checker brick.

11. An article of manufacture for association with checker brick comprising a cast iron shoe, a plurality of vertical passages extending through said shoe, and an annular projection provided on one surface thereof for interfitting'engagement with a recess formed in said checker brick.

Signed at Chicago, Illinois, this 3rd day of March, 1931. A

JOHN C. HAYES, JR. CHARLES' G. BIGELOW.

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