US745430A - Support-jacket or frame for cooling plates or coils in blast-furnaces. - Google Patents

Description

No. 745,430. PATENTED DEC. 1, 1903.

A. FARRELL. v SUPPORT JACKET 0R FRAME FOR 000mm PLATES'OR cows IN BLAST FURNACEfi. 7'

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UNITED STATES O Patented December 1 1903.

PATENT OFFICE.

AUSTIN FARRELL, OF GLADSTONE, MICHIGAN, ASSIGNOR OF ONE-HALF TO WILLIAM G. MATHER, OF CLEVELAND, OHIO.

SUPPORT-JACKET ORFRAME FOR COOLING PLATES OR COILS IN BLAST-FURNACES.

SPECIFICATION forming part of Letters Patent No. 745,430, dated December 1903- Application filed my 19. 1902.

To all whom it may concern:

Be it known that I, Ausrm FARRELL, a citizen of the United States, and a resident of Gladstone, county of Delta, and State of Michigan, have invented a certain new and useful Support Jacket or Frame for Cooling Plates or Ooils in Blast-Furnaces, of which the following is declared to be a full, clear, and exact description. V

The invention relatesto means for supporting cooling plates or coils in blast-furnaces, and more particularly for supporting those used in the walls of the furnace-boshes. The highest temperature in the furnace is maintained at the bosh just above the twy'ers, and to preserve the life of the bosh-wall cooling means are usually provided. The most effective form of cooling means have been found to be superposed rows of hollow plates or coils extending at intervals horizontally within the fire-brick wall forming the boshes; but such arrangements have been defective in that as the fire-brick of the wall, which alone in prior constructions supports the horizontal cooling plates or coils, are gradually burned out and broken away from beneath the cooling devices the latter tip or sag from positionunder the weight and downward movement of the burden within the furnace. In this way the water connections to the plates or coils are often broken, delay and increased expense in operating the furnaceare involved, and dangerous break-outs of the furnace-wall itself occasioned. I

The present invention, which is subsidiary to that covered by my application of even date herewith, Serial No. 116,140, has for its object to provide a supporting jacket or frame for securely maintaining the horizontal plates or coils in position and which is practically independent of the fire-brick body of the wall and which will prevent such cooling plates or coils from tipping from place in spite of' the burning out and loosening of the fire-brick.

The invention consists in the features of construction and arrangement of parts set forth in the following description, illustrated in the accompanying drawings, and more particularly pointed out in the appended claim.

In the drawings, Figure 1 is a central vertical section of the lower part of a blast-fur- StriallimlldlBQ. on mam In the construction illustrated the supporting-column 1O carry I -beams 11, upon which is mounted the mantle 12. The shaft 13 of the blast-furnace is surrounded by the shell 14, which rises from the mantle 12. The hearth 15 is shown as surrounded by a jacket or sheathing 16 and is provided with the usual twyer-opening 17 and cinder-notch 18. fire-brick bosh-wall 19, of the usual invertedcone-shape formation, extends between the hearth 15 and the shaft 13.

The parts thus far described are of common design, form no part of the present invention, and may be modified as desired. It is to be understood that the present improvement could be applied to a furnace of any suitable construction.

Superposed circular rows of hollow plates or coils extending horizontallywithin the wall of the boshes have been found most effective for cooling this part of the furnace, but as previously arranged are dependent for their support upon the fire-brick body of the boshwall itself. Under the intense heat to which these walls are subjected considerable expansion and contraction take place, the firebrick burn out and tend to work loose, thus breaking away the support for the horizontal cooling plates or coils. The latter frequently dip or sag from position, breaking the water connections and involving much delay and expense in operating the furnace. Moreover, dangerous break-outs of the furnace -wall itself are apt to occur.

I The present improvement provides a support frame or jacket 20, which serves to sus tainthe horizontal cooling plates or coils in position andprevents themfrom tipping or sagging even though the brickwork maybe worn or broken away beneath them.

The supporting frame or jacket 20 is formed of cast or wrought metal, is of the same general conformation as the boshes of the furnace, and preferably extends about the bosh- The wall, as shown. It is desirable to sustain the supporting jacket or frame independently of the bosh-wall 19, and it is preferably hung from the mantle of the furnace. For this purpose an annular outwardly and horizontally projecting flange 21 is provided at its upper end, which engages the inner edge of the mantle 12. Flange 21 is formed, as shown, of an angle-bar ring riveted or otherwise secured about the upper end of the supporting-jacket 20.

The superposed rows of cooling plates or coils which extend horizontally within the bosh-wall may be of any suitable construction; but preferably fiat hollow sectional plates 22 are employed, which are arranged in circular series in each row (see Fig. 3) and extend horizontally within the bosh-wall 19. (See Fig. 1.) The separate plates 22 of each row are spaced slightly apart from one another, and the plates of the separate rows are staggered to cool allportions of the bosh-wall.

The plates are sustained by the frame or jacket 20 and preferably by means of inwardly-extending annular ledges or supports 23. The latter are arranged in pairs, as indicated, to engage the upper and lower sides of the cooling-plates 22 at their outer ends, and thus prevent them from tipping or sagging. These supports or ledges 23 are preferably formed by rings of angle-bars, as indicated in the drawings, securely riveted or otherwise secured to the jacket 20.

Preferably the jacket or frame 20 is provided with a number of superposed rows of elongated openings 24, arranged in circular series. Openings 24 are arranged between the pairs of supporting-ledges 23that is to say, the latter extend inwardly from the upper and lower edges of the openings,as shown, and the openings in the separate rows are staggered in keeping with the arrangement of the cooling-plates. By this arrangement the cooling-plates 22 may be readily placed in horizontal position within the bosh wall 19, with their outer ends projecting between the supporting-ledges 23. These plates are preferably embedded between layers 25 (see Fig. 4) of mortar formed of mixed fire-clay and ground fire-brick. In order that they may be removed for repairs or the like, the plates are of somewhat smaller dimension than the openings 24 and may be withdrawn by a suitable tool which may engage holes 26, (see Fig. 4,) formed in the radial webs 27 of the plates. So, also, by having the holes 24: larger than the plates, each of the latter may be readily reset in its bed of mortar after it has been removed for any reason. Wedges 28 (see Fig. 4) are preferably driven between the upper and lower faces of the outer end of each plate and the adjacent supporting-ledges 23 in order to more firmly fix the plates in position and secure them from all danger of tipping or sagging.

Each plate is provided with an inlet 29 and an outlet 30 for cooling-water, to which the inlet and outlet pipes 31 and 32 are connected through the openings 24 of the jacket. The water connections may be arranged'in any desired manner-that is to say, each plate may be connected separately to the source of water-supply or the plates may be connected in series of two, three or four, as desired.

It is to be observed that by sustaining the outer ends of the cooling-plates between the supporting-ledges 23 of the metal supporting frame or jacket 20, which is independent of the brick body of the wall, they cannot be displaced or tipped by the, burden within the furnace even though the brickwork may be burned out or broken away beneath. Moreover, the jacket 20 is only open opposite the ends of the plates, so that the brickwork both between the separate rows and between the separate plates of each row (which are spaced somewhat apart, as shown in Fig. 2) abuts against the metal body of the jacket and is firmly bound and held in place in spite of the tendency to work loose, brought about by the expansion and contraction of the walls. By this construction the tipping of the horizontal cooling plates or coils and consequent breaking of the water connections expensive delays and repairs in operating the furnace and dangerous break-outs of the bosh-wall itself are avoided.

The-supporting frame or jacket 20 may be made of cast or wrought iron or of steel, may be made in sections bolted or riveted together, or of a single piece, as may be most convenient or desirable. The horizontally-projecting supporting-flange 21 and ledges 23 may be cast or otherwise formed in piece with the body of the frame, but for cheapne'ss of construction are preferably formed of angle-bar riveted in place. It will be observed that the supporting jacket 20 and ledges 23 do not extend within the body of the brick wall to any considerable extent,and the wall is not in any way weakened thereby.

Although preferable, means other than the ledges 23 could be employed for sustaining the cooling plates or coils from the metal frame 20 and the details of structure could be otherwise modified without departure from the essentials of the invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A blast-furnace, the bosh-wall of which is encircled by a metal jacket having a series of superposed holes formed therein, said holes being separated by integral portions of the jacket, said jacket being provided with proj ecting supports about said holes, and cooling plates or coils extending into the body of the bosh-wall and suspended at their outer ends by said supports of said jacket.

AUSTIN FARRELL.

WVitnesses:

ALBERTA ADAMIOK, HARRY L. OLAPP.

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