US1363610A - Appabattjs fob bepaibing ftjbnace-linings - Google Patents

Description

C. L. MDWRY AND C. L. DUDLEY. APPARATUS FOR REPAIRING FURNACE LININGS.

APPLICATION FILED APR.6. 1920.

1,363,610. Patented Dec. 28,1920.

2 SHEETS-SHEET l- FIGJ- NNNNNN OR C. L. MOWRY AND C. L. DUDLEY.

' APPARATUS FOR REPAIRING FURNACE LININGS.

APPLICATION FILED APR. 6, 1920.

mm \t R 0 m m: M mm b 4 4 w 7 H I M m Q A? m lwm6 P Q 647/ UNITED STATES PATENT OFFICE.

CHARLES L. Mower AND CLARENCE L. DUDLEY, or woonLAwN, PENNSYLVANIA,

APPARATUS FOR REPAIRING FURNACE-LININGS.

Specification of Letters Patent.

Patented Dec. 28, 1920.

To (422 whom it may concern.

Be it known that we, Ciranmis L. Mower and CLARnnor. L. Deters, residing at 00dlawn, in the county of Beaver and State of Pennsylvania, both citizens of the United States, have invented or discovered certain new and useful Improvements in rlipparatus for Repairing FurnaceLinings, of which improvements the following is a specific tion. I

Our invention has to do with means for impelling broken material in bulk; we have developed the invention as an adjunct to an open-hearth furnace for smelting steel, but manifestly it is not limited to such specific use.

In the operation of open-hearth furnaces, and particularly those of basic type, the reactions Which occur involve the gradual eating away of the furnace lining. Although the lining or hearth material of the furnace is carefully measured and spread before the furnace is charged and heated, still this initial body of material is often, in the progress of the operation, so far eaten away as to threaten destruction of the more permanent portions of the furnace structure, and impairment of the quality of the metal under treatment. The chemical attack of the molten charge upon the material which composes the lining is most violent along the margin of the bath or pool of molten metal. In the course of operation as commonly practised it is requisite for men to be at all times ready, and, when the consumption of the basic material has at any point ad vanced too far, to apply new quantities of material at the danger point. vSuch application is made by throwing the material from a shovel through the furnace door to the proper point along the margin of the pool of molten metal which forms the bath or furnace charge. And, since furnaces of this sort measure as much as fourteen feet across, there is required of the men tending the furnace not only a considerable degree of strength and skill, but also, in view of the extremely high temperature of the furnace, great physical endurance as well.

Mechanical conveyers of one sort and another have heretofore been proposed, to take the place of these skilled workmen; but, so far as we know, none of them has met with any enduring or extended success.

We have devised a mechanical conveyer and carried it to the point of success, and in its novel features of structure our present invention resides.

In the accompanying drawings Figure I is a view in vertical and transverse section through an open-hcartl'i furnace, in the line of door and spout, showing in side elevation conveyer apparatus of our invention; Fig.

I is a view in longitudinal and vertical section and to larger scale of a portion of the conveyer apparatus shown in Fig. I; and Fig. III is a view in horizontal section, on the plane indicated by the line IIL-III, Fig. II. Our conveyer is a gun, in the sense that 1t shoots the material through a tube or barrel to the point where application is desired. The motive power is fluid under pressure; it might for example be steam, but is preferably compressed air.

An open-hearth furnace is indicated at A. A hopper 1 is suitably mounted to be conveyed to position opposite the furnace door Any convenient method of support may be resorted to; we show the hopper carried in a frame 2 which is movable upon rollers 3 across the floor adjacent the furnace.

The gun itself consists in a long tube or barrel 4, water-jacketed as indicated at 5 in well-known manner through so much of its extent as in operation is exposed to the intense heat of the furnace. Itis of sufficient length to extend through the furnace door and across the furnace chamber to a point so related to the margin of the pool of metal which within the chamber constitutes the furnace charge that the stream of material ejected from the muzzle of the gun will fall upon the bank of the pool at or just above the margin of metal, where erosion is greatest.

This gun is carried by the hopper 1, and is through a lateral pipe-connection 7 pivoted or swiveled, preferably by the universal joint indicated at 6 to the pipe 8 which constitutes a spout or prolongation of the throat of the hopper. The support constitutes an open passageway, through which material from the hopper descends by gravity and enters the bore of the gun. This is fully and clearly indicated in Fig. II. A shutter 9 may be provided, to cut off at will or to control the effective area of the passageway (of. Fig. III).

Into the bore of the gun, and in the direction toward its delivery end or muzzle, and preferably at a point adjacent the en trance of material from hopper l. is Q 9 i jected through a nozzle 10 a jet of nuic, conveniently air under relatively high sure-100 pounds to the square inch, or thereabout. This nozzle is i l th:or h a pipe which enters the bore oi tl from the rear, as indicated in w Rearward of nozzle 10, o the length the gun barre terial enters from hopper l, is L breach or opening 11, of relatively large through which there is free how of air the bore of the gun.

The rear end of the gun, rearward point of support, is of convenien it may be counterweighted, as ii i 12, so that the whole structure is well baianced in its support from 10 t3, and a handle 13 may be provided, or conve in turning and tipping, The tion 14-, and the water co 16 for the water jacket, ti cated. A lever 17 is provided, with a handle, for manipulating shutter 9.

Operation is simple. The apps brought to position, with the unit; gun extending through the door of nace a suilicieut distance (to he d by experience), is indicated in i will be understood that under service ditions a pool of molten meta will be res ing on the hearth ot' the fi time of introduction water ing in the water jacket of c passageway from the hopper l. l open, the compressed air supply is, o trol valve (not shown) adni "d connection i l to blow in a nozzle 10. This inblown j additional quantities oi? air ing 11, and the result is a stream of air sweeping through the gun and across the point of -5 material from hopper l-which i I, has been said, descei'lds by gravity taro passageway 8, 7 into the gun bore. stream of air sweeping forward carries it this solid material and delivers V stream from the muzzle of the gun. be understood that in a proper control 0 i air supply, the slide or shutter 92, the balland-socket joint 6 with the provision for manual swinging found in han lie 13, there are all the factors necessary to direct stream of material and deliver it to the desired point through a considerable the frame ill aitord is, in the remaining adjus sul client flexibility to b point desired on the i shore ti o p el of metal, and shoveling wil su'liice tor repair of the pro ate shore, liowit will be understood that he possibili, ce there, and the a urams may be made easy of movementover wide as may be desired shoving atlorded iii the drawings is en mplary: in. the B'l'lSll'lIlg cle is we define ishszt is of ti essence oi the rest, variation within the Knowledge Oil the engineer is permissible and expected We claim as our invention:

l gun for impelling broken material bulk, consisting of a barrel, a passageway for material opening transversely into said 'el, fluid jet directed longitudinally of in barrel from a point adjacent the open ng of said passageway, and an air induc- 101 port opening to said barrel rearward oit o ening of said passageway, substanas described. ln apparatus for impelling broken ina-- terial in bulk, the combination of a frame, a hopp r car ied in said fram and a gun plvotally carried by said hopper wl A gun said hopper opens, substautuilly s 8 In apparatus for inpelling lrolren material in btlr, the combination of a frame, a hopper carried in said i aine, a gun caried by said hopper by a universal joint, a passageway -from said hopper to the barrel at said gun, a for -rardly directed 'liluid nozarranged in the barrel 0;? said gun, and port in the barrel oi? said gun rearward of the point where said passageway enters said gun barrel, substantially as de scribed In testimony whereof: we have hereunto set our hands.

CHARLES It lchlllVltYu CLARENCE DUDLEY.

lt itnesses 'W. R. KARBAN,

T. MOONEY,

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