US1279446A - Twyer. - Google Patents

Description

W. D. ROSS, JR.

TWYER. v APPLICATION FILED JAN- l6, I9I8.

1,279,446. Patented Sept. 17,1918.

WALTER D. ROSS, JR., 0F ANNISTON, ALABAMA.

its.

TWYER.

Specification of Letters Patent. Patented Sept. 17, 1918.

Application filed January 16, 1918. Serial No. 212,034.

To all whom it may concern: .Be it known that I, WALTER D. Ross, J12, a citizen of the United States, residing at Anniston, in the county of Calhoun and State of Alabama, have invented certain new and useful Improvements in Twyers, of which the following is a specification.

This invention relates totwyers and has special reference to twyers of the type disclosed in Letters Patent No. 1,205,568, granted to me November 21, 1916. One object of the present invention is to provide a construction whereby an increased volume of air will be admitted to the lower twyer and the blast issuing from said twyer thereby strengthened. A further object of the invention is to improve the construction and facilitate the removal of broken or burnt out parts.

The invention is illustrated in the accom panying drawings, in which I Figure 1 is a'vertical section of a cupola furnace having my improved twyers incor-- porated therein; 7

Fig. 2 is a horizontal section on the line 2-2 of Fig. 1;

Fig. 3 is a plan view of a portion of the lower twyer;

' vcnicnt source of air 'under pressure.

Fig. 4 is a detail perspective View of the parts of the lower twyer separated but in their proper relative positions;

Fig. 5 is a detail perspective view of the channel member which extends between the filler blocks. I

The cupola furnace 1 may be of the usual or any preferred construction and is equipped with the usual annular inclosing air box 2 connected through a conduit 3 with any con- Upper and lower twyers are embedded in the wall of the furnace to admit air from the air box to the combustion chamber of" the furnace and direct the air currents onto the metal.

In carrying out my present invention, I employ at each lower twyer a lower twyer plate 4 which is substantially of the same construction as the lower twyer plate disclosed in my aforesaid patent, there being a division block 5 at its center and posts 6 at its ends, the inner walls of said posts convergmg outwardly and the posts and division blocks being inte ral with the twyer-plate or separate thcrefi'om and rested thereon as may be preferred: The upper twyer plate 7 rests at its ends upon the posts 6 and bridges the space between them, resting at its center upon the division block 5. This twyer plate 7 is equal in width to about half the width of the lower twyer plate and is of arcuate form, being of the same inside radius as the lower twyer plate and the furnace wall, and all the mentioned parts being built into the wall of the furnace as will be read- 'ily understood and as shown in Fig. 1 of the ductm m mber is substantially an angle bar curved longitudinally to correspond to the arcuate form of the twyenplate and having a vertical flange 9 at its inner side whichbears against the outer edg of the upper twyer plate 7. An upper horizontal. flange 10 extends outwardly from the upper edge of the flange 9' and this flange 1.0 is constructed at its center with a notch 11 and at its ends with notches 12, While from the outer edge of said flange 10 at the ends thereof are depending flanges or feet 13 which are designed to bear upon the upper surfaces of the adjacent posts 6 and have their inner terminal edges meeting the inner vertical walls of the said posts. It will thus be readily seen that an open space is )rovided at the outer side of and above t e lower. twyer plate so that a greater volume of air a so; a

may be admitted to the twyer than could be admitted by the space between the outer terfilling blocks are wedge-shaped and prefer-- ably are provided in two sizes which are arranged alternately. By providing a plurality of the blocks alternately of different sizes I am, enabled to fit the blocks in place readily, and easily attain the desired uniformity of the inner surface of the furnace wall adj accnt the blocks. As shown clearly 11o in Fig. 1 the inner ends of these several filling bloclcs are projected beyond the inner it that ends of the posts 6 and the twyer plates so that the furnace lining may be made thicker above the said blocks, and the under surface of the inner ends of the blocks are beveled, as shown, so that the air blast may spread as it emerges from the twyers. Resting upon the air directing member 8, and coinciding with the notches 11 and 12 therein, are air conveying channel members 15 which are set into the outer surface of the furnace Wall at intervals around the same and are provided near their upper ends with openings 16 around which on their inner surfaces are bosses 17. The upper twyers or nozzles 18 are set in the furnace wall in an inclined position, as shown in Fig. 1, and have, their upper. ends beveled so that they will fit within the circular opening 16 and the bosses l7 and form a tight joint therewith. As the: upper twyers or nozzles are inclined downwardly and inwardly, the air will be directed most efficiently upon the charge Within 'the furnace.

It will be readily noted from the fore going description taken in connection with the accompanying drawings, that the channel members 15 are disposed vertically and their upper ends are closed while their lower ends are open, said members consisting substantlally of an inner plate 21, having outwardly extending flanges 22 at its side edges connected by a flange or web 23 at its upper end. The lower ends of the members rest upon the air directing members 8 around the notches therein, and the space between the flanges 22 is open to the air box "2 so the air. entering the said box and filling the same will at once enter the channel members and pass therefrom into the interior of the air-conveying members 8 and Will be thereby crowded into the diverging passages through the lower twyers while the air admitted to the upper ends of the channel members will pass through the nozzles or upper twyers 18. 'It will be readily noted that the ends of the air directing members 8 are disposed between the inlet openings of the lower twyer members inasmuch as the are supported by the posts at the ends of the of the' air admitted to lower twyer. members. The greater portion the channel members,

at the ends of the lower twyers, will, conseinmate as will be readily understood. I am, there-' fore, enabled to increase the volume of air directed upon the charge of ore without increasing the size or dimensions of the furnace and as a greater volume of air will be permitted to pass through the twyers the life of the parts exposed to the heat will be prolonged. The hollow construction of these parts also reduces the quantity of metal necessary and the "provision of additional air passages and upper twyers effects a more equal distribution of the air. The device is exceedingly simple in the construction and arrangement of its parts and may be applied to any furnace now in use at a low cost. It very often happens, especially in large operations, that the upper twyer plate 7 will be burnt oil and the filler blocks 14 be burnt out in sections. Sometimes, parts of the posts 6 are burnt off. My construction permits the burnt member to be easily withdrawn and a new member substituted therefor without requiring an entire section to be torn out and rebuilt.

Having thus described the invention, what is claimed as new is:

1. The combination of a lower plate, posts at the ends twyer plate supported b Y said posts and bridging the space between the same at the inner side of the lower twyer plate, and an air-conveying member supported by said posts and bridging and communicating twyer with. the space between them, at the outer side thereof.

2. The comblnatlon of a lower vtwycr plate, posts at the ends thereof, an upperv WALTER D. ROSS, J3. [L.s.]

thereof, an upper.

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