US2869488A

US2869488A - Dual arch

Info

Publication number: US2869488A
Application number: US606887A
Authority: US
Inventors: Joseph J Posey
Original assignee: United States Steel Corp
Current assignee: United States Steel Corp
Priority date: 1956-08-29
Filing date: 1956-08-29
Publication date: 1959-01-20
Anticipated expiration: 1976-01-20

Description

J. J. POSEY Jan. 20, 1959 DUAL ARCH 2 Sheets-Sheet 1 Filed Aug. 29, 1956 //v VE/VTOR. JOSEPH .1. POSEK.

his Attorney.

Jan. 20, 1959 G J. J. POSEY 2,869,488.

DUAL ARCH Filed Aug. 29, 1956 2 Sheets-Sheet 2 //V VE/V 7'0R.' JOSEPH J. POSEY,

his Af/omey.

DUAL ARCH Joseph I. Pusey, Dennra, Pa, assiguor to United States Steel Corporation, a corporation of New Jersey Application August 29, 1956, Serial No. 606,887

2 (Ilaims. (Cl. Mil-99) This invention relates to a structure and more particularly to a structure between the checker chambers and cinder pocket in the fan tail section of an open hearth furnace. In these furnaces two passageways are arranged side by side with the ceiling of the passageways being sprung arches. A single center pier supports the center skewbacks for the arches. It is desired to have the area of the passageways as large as possible and the center pier cuts down this area to a considerable degree. The center pier also requires considerable maintenance.

It is therefore an object of my invention to provide a supporting structure for a pair of arches in which the center supporting pier is eliminated.

This and other objects will be more apparent after referring to the following specification and attached draw ings, in which:

Figure 1 is a sectional view of an open hearth furnace incorporating my invention therein;

Figure 2 is a view taken on the line II-II of Figure 1;

Figure 3 is a view taken on the line III-III of Figure 1;

Figure 4 is a perspective view of the center skew with the arches being shown by dash-dot lines; and

Figure 5 is a view showing a slight modification of the skew of Figure 4.

Referring more particularly to the drawings, reference. numeral 2 indicates a checker chamber of an open hearth furnace. A passageway 45 leads from the checker chamber 2 to the cinder pocket 6. A structural support 3 is located above the passageway 4. A passageway leads from the cinder pocket 6 upwardly to the main or bath portion 12 of the furnace. The roof of the passageway 4 is formed of two sprung arches 14 and 14'. The

arches 14 and 1e are substantial duplicates so that only one will be described in detail. The arch 14 is formed of a plurality of rings 16 made up of refractory bricks. Ten of such rings are shown but it will be understood that the number may vary. Skewback blocks the to 18k are provided for the outer end of the rings 16 and are supported in a wall 29. It will be seen that the skewbacks are arranged in a step formation with the skewbacks increasing in elevation from one end to the other with the skewback 18k being at the maximum elevation. A center skew 22 supports the inner ends of both

arches

14 and 14. Skew 22 slopes upwardly with its lower end being opposite the highest skewback 18k and its highest end opposite the skewback 18a. The skew 22 has a substantially triangular cross-section at its lower end which merges into a substantially trapezoidal crosssection at its upper end, the trapezoidal section being wider at its top than at its bottom. An I-beam 24 extends the length of the skew and is embedded in a cast refractory 26. Heat dissipating pins 28 are fastened to the beam 24 as by welding.

Lugs

29 and 30 are fastened to opposite ends of the beam 24 as by welding.

Patented Jan. 2%, 1195?} TQQ The skew 22 may be made unitary as shown in Figure 4 or in two pieces as shown in Figure 5. In the latter case skew 22 is separated on a diagonal line 32 forming two

sections

34 and 36 each having a beam section 24' and 24" embedded therein. The sections 24' and 24" have the heat dissipating pins 28 welded thereto and also lugs 29 and 3%.

Additional lugs

38 and 40 are Welded to the adjacent ends of beams 24;" and 24".

The structure is constructed as follows: The skewbacks 18a to 18!: are arranged on the piers 2t) and beam 24- is suspended from structure 8 by means of

suspen sion rods

42 and 44 which engage lugs 29 and 39. A form is then placed around the beam 24 and filled with the cast refractory 26. After the cast refractory sets, the form is removed and the rings 18:: to 18k are laid up with refractory brick in the ordinary manner. After the arch is completed suspension rod 4% is no longer necessary since the skew 22 will be held in place at its upper end by means of its key action. In place of casting the skew 22 in place it may be precast at any convenient location and then positioned by means of lugs 29 and 3t and

erection rods

42 and 44. The procedure will be the same when utilizing the two piece skew 22' with additional rods being utilized to support the adjacent ends of the

skew sections

34 and 36. it will also be understood that the same construction may be used regardless of whether refractory material or ordinary brick and concrete are used.

While two embodiments of my invention have been shown and described it will be apparent that other adaptations and modifications may be made without departing from the scope of the following claims.

I claim:

1. A structure comprising. two sprung arches arranged side by side in transverse relationship and having a plurality of rings, a skewback for the outer end of each ring, the skewbacks for each arch decreasing in elevation from one end to the other, a center skew for supporting the inner ends of said rings, said skew sloping upwardly with its lower end opposite the higher ends of the skewbacks, said skew having a substantially triangular cross-section at its lower end merging into a substantially trapezoidal cross-section at its upper end, said trapezoidal section being wider at the top than at its bottom, and means for supporting the lower end of said skew,

2. A structure comprising two sprung arches arranged side by side in transverse relationship and having a plurality of rings a skewback for the outer end of each ring, the skewbacks'for each arch decreasing in elevation from one end to the other, a center skew for supporting the inner ends of said rings, said skew sloping upwardly with its lower end opposite the higher ends of the skewback, said skew having a substantially triangular cross-section at its lower end merging into a substantially trapezoidal cross-section at its upper end, said trapezoidal section being wider at the top than at its bottom, a beam extending the length of and embedded in said skew, heat dissipating pins fastened to said beam, and means for supporting the lower end of said skew.

References (iited in the file of this patent UNITED STATES PATENTS 325,403 Flagler Sept. 1, 1885 1,686,387 Loftus Oct. 2, 1928 1,955,996 Wynne et a1. Apr. 24, 1934 2,028,169 Sahlberg Jan. 21, 1936 2,518,352 McFeaters Aug. 8, 1950