US1456205A - Furnace-doorway construction - Google Patents

Description

May 22, 1923. 1,456,205

s. G. WORTON FURNACE DOORWAY CONSTRUCTI ON Filed Oct. 13 192; 5 Sheets-Sheet 1 Vlihesses: Q Q N fnvenlar: Syn/052 6T /4 a70/v,

May 22, 1923. 1,456,205

S. G. WORTON v FURNACE DOORWAY CONSTRUCTION Filed Oct. 13 1921 5 Sheets-Sheet 2 May 22; 1923. 1,456,205

S G. WORTON FURNACE DOORWAY CONSTRUCTION Filed Oct. 15, 1921 5 Sheets-Sheet 5 S. G. WORTON FURNACE DOORWAY CONSTRUCTION May 22, 1923. 1,456,205

Filed Oct. 13. 1921 5 Sheets-Sheet 4- May 22, 1923.

S. G. WORTON FURNACE DOORWAY CONSTRUCTION Filed Oct. 15, 1921 5 Sheets-Sheet 5 1 such furnaces, and are roof, is exposed by Patented May 22', 1923.

UNITED STATES SAMUEL WORTON, OF DUQUESNE, PENNSYLVANIA.

FURNACE-DOORWAY CONSTRUCTION.

Application filed October 13, 1921p Serial No( 507,406.

To all whom it may concern:

Be it known that I, SAMUEL G. WORTON, a citizen of the United States, and resident of Duquesne, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements 1n vide a novel, eflicient and economical means for protecting the refractory skewbacks and metal skewback channel or support immediately above said doorways when the doorway arch is eliminated.

As is well known, when charging openhearth furnaces, charging boxes loaded with the material to be charged are inserted through doorways on the charging side of dumped by a charging machine, and, due to the small clearance existing in the" arched doorways, the charging boxes or material in the charging boxes, and thereby loosenor destroy them. In many instances not only is the arch of the doorway destroyed, but the door frame and front wall of the In any event the metal skewback support, which forms the basefor the arched furnace the destruction of the arch, and in a short time is destroyed by the intense heat of the furnace, thus weakening the furnace structure and lessening the life of the furnace roof. I

With doorways constructed in accordance with this invention, the above difficulties are avoided and overcome and additional clearance is provided in the doorways by eliminating the arch at the top of the doorways, so that handling of the charging boxes is facilitated. The skewback and skewback support immediately above the top of the doorways are protected from the intense heat by a metal,

damage to and destruction of the. skewback' support and consequent weakening of.

the roof are lessened and practically eliminated.

often strike the arches:

furnace also are loosened.

-inga water cooled pipe, so that Referring now to the drawings, forming part of this specification, Figure 1 is a front elevation of the charging side of an open-hearth furnace having my invention applied thereto. 2

Figure 2 is an enlarged fragmentary front elevation of the charging side of the furnace, showing details in the construction of substantially rectangular doorways.-

Figure 3 is a sectional end elevation, on the line III-III of Figure 1. Figure 4 is a front elevation of the charging side of a furnace having a modified form of this invention applied thereto.

Figure 5 is an enlarged fragmentary front elevation similar to Figure 2, showing details of the modified form of the invention shown in Figure 4.

Figure 6 1s a sectional end elevation through the front wall and doorway of a furnace having the modified form of the invention shown in Figures 4; and 5 applied thereto.

In the accompanying drawings, in which the invention is shown as applied to a well known and approved form of open-hearth furnace, the furnace has the usual front wall 2 back wall 3, and arched roof 4. The refractory skewbacks-which receive the thrust of the roof 4 are supported by suitable metal channels 5 on the front and back walls 2 and 3, and the whole structure is tied or held together by suitable buckstays 6 as is common in'this class of furnaces.

The front or charging side wall 2 of the furnace 1S ehargi n openings'or doorways? surrounded by suita le door frames 8, and closed b usual vertically movable doors 9, the doors being opened and closed by the door operating mechanism 10. The wall 2 of the charging furnace also has a smaller doorway near each end of the furnace, as is shown in Figures 1 and 4, these small doorways'eaeh havdoor frame 8 and door 9*. The doors 9 are raised and lowered by a door operatin mechanism 10 somewhat smaller, but

u n a a otherwise the same as the llftin mechanlsm provided with a plurality of the side of the 10 for the doors 9. The small oorways are not used for charging the furnace, being provided primarily to enable the interior of the furnace to be inspected and to enable repairs being made to the furnace lining and bottom.

The doorways 7 are substantially reetangu way extends from the bottom face of the skewback supporting channel 5 to the foreplate 11, and the usual masonry arch at the top of each doorway is omitted. It will readily be seen that by the omission of the refractory arch at the top of the doorways 7, the height of the doorways is increased, and considerable additional clearance in a vertical direction is provided, which facilitates the charging operations and prevents possible damage to such arches and loosening of the door frame and front wall by striking such parts with loaded charging boxes in attempting to pass them through said door ways.

A water cooled pipe 12 is mounted in the fillet of the skewback channel 5, through which water or other cooling medium flows so as to prevent the intense heat of the furnace destroying theske wback channel.

The skewback channel 5, immediately above each doorway 7, directly exposed to the intense heat of the furnace, and at these points the pipe 12 is inadequate to prevent destruction of the exposed portions of the channel 5 and skewbacks and, therefore, a relatively large water cooled metalpipe 13 is mounted directly under and in close proximity to the skew back channel 5 on the charging side of the furnace so as to protect the exposed portions of the channel 5 and skewbacks supported thereby above each doorway. The pipes 13 extend horizontally across the width of the doorways 7 and into the wal1'2 to a point beyond the door frames 8, and then extend horizontally outward to a point on the exterior of the wall 2, where they are connected to suitable risers 14: and 15 .at the ends thereof. The riser 14 is provided with a valve 14 intermediate its ends and is connected to a water supply main 16. The I'iSer 15 is provided intermediate its ends with a T connection 15 to which is connected an outlet pipe 17 that extends downwardly and terminates short of a funnel member 18 on the upper end of a drain pi e 19, the pipe 19 being connected at its. ower end with. a main drain pipe 20. The riser 15 extends above theT connection 15 to a point above I the top of the furnace and forms a vent.

As will be readily understood, the vent forming riser 15 will prevent the outlet pipe 17, which has its lower end extending to a lower level than the pipe 13, acting as a siphon when the water supply is cut off at the valve 14", so that even with the water supply shut off a head of water will be maintained at all times in the pipe 13, and this pipe will not become drained; The space between the end of the outlet pipel'i' and the funnel member 18 is provided so that a glance will show whether the desired circulation of cooling water is occurring, and if not, indicate that fact and tell that something is WI'OIio' with the water circulating system that requires attention.

lVith a constant circulation of cooling water through the pipes 13, the exposed portions of the skewback channel are kept at a sufficiently low temperature to prevent them being weakened and destroyed.

In F igures' l to 6 a single pipe 25 is shown mounted under and in close proximity to the bottom flange of the skewback channel 5 and extending from end to end thereof. This pipe 25 serves to not only 0001 and protect the exposed surfaces of the skewback channel immediately above the doorways 7, but also serves to maintain the remainder of the skewback channel which is embedded in the refractory walls of the furnace and the refractory skewbacks at a lower temperature.

The pipe 25 is connected at its ends to upper end of a pipe 33 which is connected at its lower end with a drain main 34. The upper end of the riser 27 is open so as to form a vent which prevents the outlet pipe 31 acting as a siphon to drain all the water from the pipe 25 when the supplyis cut off, as by closing the valve 29.

While only two specific embodiments of this invention have been shown and described,- various modifications may be made in constructional details of the furnace.

The arch above the doorways that are closed by the doors 9 may be omitted, and cooling means such as are used with the doorways 7 may be used when found desirable, and other changes made.

- I claim l. A furnace having a side wall with an opening therein, a door frame around said opening, a metal skewback supporting member lying back of the door frame d above the, opening, and at least one-cooling pipe separate from the door frame,'located back ing member so as to protect said member.

2.- A furnace having a side wall with an opening therein, a door frame around said opening, a metal skewback supporting member lying back of the door frame and above l the opening, said skewback supporting member having its lower face exposed at said door opening, and an exposedlength of cooling pipe back of the door frame at the top of skewback supporting member lying back of said door frames at the top of said doorways, said skewback supporting member having its lower face exposed at said doorways, and

at least one cooling pipe extending acrossthe top of said door openings to protect the exposed face of said skewbacksupporting member, said pipe being separate from and located back of said door frames, below the exposed lower face of said skewback supporting member.

4:. A furnace having a side wall with a plurality of door openings therein, a door frame around each of said openings, a metal skewback supporting member lying back of said door frames and above said door openings, said supporting member having the lower face thereof exposed opposite said door openings, a water cooled pipe extending across the top of each of said door openings to protect the exposed face of said skewback supporting member, said pipes being separate from and located back of said door frames, below the exposed lower face of said skcwback supporting member, inlet and outlet conduits connecting each of said pipes with suppl and waste mains, and means for controlling the circulation of water through each of said pipes independent of the others. In testimony whereof I have hereunto set my hand.

' SAMUEL G. WORTON.

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