US1076540A - Furnace-port. - Google Patents

Description

A. W. ALLEN.

FURNACE PORT. APPLICATION FILED JAN. z, 1913.

,resumir ormoni.

'ANSN "5.1. ALLEN',- OFBBMINQTI, ALABAMA.

FURNACE-FORT.

Specification `o"."atxters atent.

A@atentredct.. 211,191.3.,

application filed January $5, H9213. settanta. 239,966.

` archseparating the gas and air ports' of open-hearth `fu 'neces' is affected 'by' Ithe intense heat' and disi-ntegrates, particularly at thepoint-or nosethereof.r lv'ihen this has progressed to a certain'point` the heat must be Withdrawn land the arch rebuilt.' This is necessary inasmuch as the liames resulting-from the combustion offthelgas and air at the nose of the archWilhfunless the arch is properly formed, -impinge against the roof, destroying the same Whereas the liames should be' directed downwardly against the bath of-metal on the hearth. Numerous means have been suggested for cool-ing these arches and many thereof include v:meritorious: features. S omer objections are present, hovvevenand it is the purpose of the 'resent invention to overcome certain of t e objections in a device which shall be simple and easily installed, all Without unnecessary expense.

'Une of the principal objects of the present V.device is to provide cooling means Which shall be inherently self-supporting and which shall notwithstanding be composed of a plurality of units, any one of Which may be removed and replaced by one in operative condition all Without delaying the operation of the furnace.

A further Objectis to provide such means* Which shall not make the operation and length of life of the furnace dependent upon a constant supply of cooling Water. In' one or more of the devices at present in use, should the supply of Water fail, the arch would at once disintegrate and the furnace be necessarily shut down until repairs could be made. In my device should the supply of Water fail the cooling means would burn .out but the operation of the furnace could be continued successfully for a large number of heats Without diliiculty. ln the meantime other cooling vdevices might be installed and the proper operation resumed. Such advantage is dependent on the installation of the device in connection With a refractory self-supporting archx beneath 'vv-liich thejmetallic arch is located. This .metallic 'arch is `com-posed of a plurality of trapezoidal `metallic boxes placed longitudinallyiofy the furnace with the outer' ends projecting througlrtlfie end Wall' :of the fur# nace' xWith'f-tlie diagonal sides :ofthe boxes in Contact. Thus any onel of theboxes may berernovedandfl'replaceid. This requires-,

however,` that the remainingboxes shall be supported when a unit is removedfi Thereforel provide. afrshort"auxiliaryarch of refractory material*- llilieneath themetallic arch'.

This servesffthe'double Ipurpose of supporting-the unitswvhen' 'oneef their numberis removed and of'preventing the unduev cooling of thefeutgoing burnt gases prior to enteringV the checkers.

The-invention will bemore readily vunderstood by reference tothe "accompanying drawings7 wherein liigure 1'is a longitudinal'section'l through onerend' of an open-hearth furnace having my novel Water -`cooling means applied thereto Fig. .2 is an end elevation partly in seotionyofl` the same; Fig; 3f'1is an end elevation of one of the cooling units, and

llig. 4' is a longitudinal section through one of the units. y

Referring morel particularly to the drawings it will be seen that the furnace Which may be of the usual construction is provided with la gas port 10 and air ports 11. These ports are separated by an arch 12 of refractory material Which arch extends inward of the furnace to the proper or ideal point in order to secure proper combustion and direction of the flames. Beneath the refractory arch 12 I provide a metallic Water-cooled arch composed of a plurality of units 13. These units are as shown in Fig. 3 in the form o f a trapezoid in cross section and are closed at their inner and outer ends by plugs 111-v-15 respectively which maybe Welded in place. 'lhe plug 15 is apertured to accommodate a fitting 16 to which isv connected an overflow pipe 17 A further over-flow pipe 1"(a is provided l delivering into a trough 17h. `Water is supplied to the unit through pipe 18 connected to a header 19 and extending to a point near the inner end of the unit 13. By reference to Fig.- 2 it Will be seen that by placing a pluralityof these units 13 side by side a metalli'.1 arch is formed.

Preferably the units forming the marginal edges of the metallic arch are seated in the vertical Walls Which serve to outline the Width of the gas port. |Ihus ythey assist in maintaining the opening at the proper size.

In order to provide means for supporting the units in case one thereof is removed for repair and also .for the purpose of pre-A venting the undue cooling of the outgoing` gases, I provide a short, auxiliary arch 20 of refractory material. Wise self-supporting and preferably extends inward under the cooling boxes about half the length thereof in the furnace.

The advantages of the present construction are many and such advantages might be secured by the use of obvious modifications in the construction. Such modifications as are Within the scope of my claims I consider Within the spirit of my invention.

I claim: i

1. Cooling means for the ports of. openhearth furnaces, comprising in combination an arch, an underlying longitudinally extending metallic arch, said underlying arch being made -up from` a plurality of units, each unit comprising a longitudinally extending box, angular in cross section, the sides of the units being in engagement, and means for supplying cooling liquid to each unit, substantially as described,l y

2. Cooling means for the ports of openhearth furnaces, comprising in combination a refractory arch, a plurality of underlying,

rllhis arch is like-A longitudinally extending Water-cooling units each unit having the form of a trapezoid in cross-section, the diagonal sides of said units being in engagement whereby a metallic arch is formed, and means for supplying liquid to said units, substantially as described.

3. In a furnace, the combination With the gas and air intakes of a division Wall formed at the junction of said intakes said wall being composed of upper and lower self-supporting refractory arches and an intern'iediate Water-cooled metallic arch, saidA metallic arch being composed of a plurality of longitudinally extending boxes with their sides in contact, substantially as described..

4l. In a furnace having gas and air ports, a division Wall in the form of an arch, said arch being composed of an upper refractory, self-supporting arch, a shorter lower refractory self-supporting arch and an intermediate metallic, normally self-supporting watercooled arch, said arch being made up of a plurality of Water-cooling units, whereby any onev thereof may be removed and replaced, said lower arch meanwhile supporting the remainder of the units, substantially as described.

ANSON W. ALLEN.

v Witnesses: Y

FRANK MCGOWAN, C. SHADDICK.

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