US2529768A - Self-aligning sleeve for pressuretype gas burners and the like - Google Patents

Description

0 c. M. GUY

SELF-ALIGNING SLEEVE FOR PRESSURE-TYPE GAS BURNERS AND THE LIKE Filed Sept. 14, 1948 Q Q N\ J1EE I I a 0/4/3155 M ail/r, AM 6412a Hi5 ATTORNEY.

Patented Nov. 14, 1950 SELF-ALIGNING I SLEEVE .FOR PRESSURE- TYPE GAS BURNERS AND THE LIKE Charles M. Guy, Pittsburgh, Pa., assignor to Carnegie-Illinois Steel Corporation, a corporation of New Jersey Application September 14, 1948, Serial No. 49,146

2 Claims. (Cl. 158-109) This invention relates to pressure-type gas burners for blast furnace stoves and more particularly to an adjustable packing sleeve for such burners.

matically maintain the proper alignment and seating of the nozzle of the burner against the flange of the stove gas port at all times to thereby prevent leakage of the fuel mixture.

Operation of a blast furnace requires the use 5 This and other objects will be apparent from of an air blast, heated, for efficient furnace the following specification when read in conopei-ation, to a high temperature, generally about junction with the attached drawings, wherein: 1000 F. The heating of the air blast is carried Figure 1 is a side elevation partly in longion in blast furnace auxiliary equipment comtudinal section; and monly termed stoves and is effected by passing m Figure 2 is an enlarged sectional detail. theair blast through a brick checkerwork in Referring more particularly to the drawings, the stove, from which the air blast receives heat reference numeral 2 indicates a conventional under a regenerative principle well known to type blast furnace stove gas burner having'a those versed in the art, prior to'entering the nozzle 4 projecting from its forward end and blast furnace. Since the brick checkerwork in extending toward the flange 6 of a, gas port 8 stoves is alternately heated by the products of in the side of a blast furnace stove S. combustion of a gaseous fuel, usually blast fur- The self-aligning packing sleeve of my invennace gas, in their passage from the blast furnace tion consists of an adjustable cylindrical memto the open and cooled by the passage of air in ber Ill slidably mounted around the circuman opposite direction under pressure, a system ference of the burner nozzle 4; a packing ring of burners adapted to be connected in gas tight l2, made of flexible material, slidably mounted manner with the stoves when they are'in the circumferentially around the outer end of the on-gas cycle is required. When the stoves are cylindrical member lB-and projecting therefrom; on-blast, that is, when air is passing through a collar I4, which supports packing ring l2, the checkerwork on the way to the furnace, the mounted around the outer surface of the cylingas burners are usually retracted from the stoves. drical member l 9 adjacent and partly enclosing The burners in use today are of the pressurepacking ring I 2; and a stop ring l6 fixedly type having an integral air blower and a gas mounted, by means of a shrink fit, around the inlet leading to a chamber wherein the gas iS circumference of cylindrical member In and mixed in the proper proportion with the air spaced rearwardly of collar I4. drawn in by the air blower. The mixed fuel A longitudinal bolt hole I8 is provided through passes ou 'O a nOZZle p j ng from the stop member l6. Extending through bolt hole burner into a gas por i he Side Of the stove I8 is a tap bolt 20 having its forward end For ffici n p a i n i is essential h t the threaded into collar l4. The diameter of bolt 20 connection between the nozzle and the stove po is less than the diameter of bolt hole l8 and the be gas-tight t pr v nt l a a of t l longitudinal movement of the tap bolt 20 is ture while the stoves are on-gas. It frequently limited b means of a pair of lock nuts 22 occurs in practice, however, that the continual threaded on t end of t tap'bolt projecting heating and cooling of the stove results in adja ent stop ring a ua misalignment f t Stove gas D9 flange A compression spring 24 is provided around a d e nozzle of the burner- Since W my that portion of tap bolt 20 which is intermediate inventlonr f means were proYlded compensate collar l4 and stop ring l6. Spring 24 bears with for thls mlsahgnment cns1der ab1e leakage 9 its one end against collar l4 and its other end ggzeg the resultant opemng was expen' 5 against stop ring I6. I have found it preferable As is well known, blast furnace gas contains to use zu the pt g asstelmbl es, ggnsistmg approximately 27% carbon monoxide and is of f'? bolt rlock ml 5 i spl'mg I spate therefore, noxious and extremely dangerous equidistantly around the periphery of cylindrical The leakage of this gas into the atmosphere at member or near ground level has been the cause of In Order to p v y gas leakage between numerous fatalities or near fatalities among blast cylindrical member ID and nozzle 4, the rearfurnace workers. ward end of cylindrical member I0 is enlarged It is accordingly an object of my invention to to provide a substantial annular space 25 between provide a self-aligning packing sleeve for blast the under side of the rearward end of member furnace stove gas burners which will auto- ID and the outer surface of nozzle 4 and a conrack 32. Disposed below rack 32 and in engagement therewith is a pinion 34. Keyed to the shaft carrying pinion 34 is a hand-wheel 36 whereby the pinion may be manually rotated to move the packing sleeve toward and away from the port 8.

In operation, before the blast furnace stove is put on on-gas cycle, that is, the period when the brick checkerwork of the stove is heated, hand-wheel 36 is rotated to move cylindrical member ID, by means of rack and pinion 32 and 34, into abutting position against flange 6 of gas port 8 to compress the springs 24. In this position packing ring l2 provides a continuous 'seal around the forward end of cylindrical member 10 and flange 6. Packing ring I2 is maintained in position automatically at all times by means of compression springs 24 constantly urging collar 14 in the forward direction to hold the packing ring 12 against flange 6. Thus an effective gas seal is maintained even though the forward end of cylindrical member I a may be forced out of tightly abutting position with flange 6.

While one embodiment of my invention has been shown and described it will be apparent that other adaptations and modifications may be made without departing from'the scope of the following claims.

I claim:

1. A packing sleeve for a gas burner having a fuel nozzle projecting from the end thereof comprising a cylindrical member slidingly mounted circumferentially around said nozzle, a packing ring slidably mounted around the outer surface of said cylindrical member and projecting from the forward end thereof, a collar slidably mounted around said cylindrical member adjacent said packing ring, said packing ring being supported by said collar, a plurality of resilient means mounted around said cylindrical member at spaced intervals urging said collar supported packing ring forward beyond the forward end of said cylindrical member, said resilient means consisting of a stop ring fixedly mounted around said cylindrical member in spaced relationship with said collar, said stop ring having a longitudinal bolt hole therethrough, a tap bolt having a diameter slightly less than the diameter of said bolt hole extending through said bolt hole and having its forward end threaded into said collar, and its other end projecting rearwardly of said stop ring, the longitudinal movement of said tap bolt being limited by a pair of lock nuts 4 threaded around its rearwardly projecting end adjacent said stop ring, and a compression spring mounted around said tap bolt intermediate said collar and said stop ring bearing against said collar on its one end and against said stop ring on its other end.

2. A packing sleeve for a gas burner having a fuel nozzle'projecting from the'end thereof comprising a cylindrical member slidingly mounted circumferentially around said nozzle, said cylindrical member being adapted to move longitudinally on the outer surface of said nozzle, means for moving said cylindrical member longitudinally, a packing ring slidably mounted around the outer surface ofsaid cylindrical member and projecting from the forward end thereof, a collar slidably mounted around said cylindrical member adjacent said packing ring, said packing ring being supported by said collar, a plurality of resilient means mounted on the circumferential surface of said cylindrical member at spaced intervals adjacent said collar urging said collar supported packing ring forward beyond the forward end of said nozzle, said resilient means consisting of a stop ring fixedly mounted around said cylindrical member in spaced relationship with said collar, said stop ring having a bolt hole therethrough, a tap bolt having a diameter slightly less than the diameter of said bolt hole extending through said bolt hole and having its forward end threaded into said collar and its other end projecting rearwardly of said stop ring,

the longitudinal movement of said tap bolt being limited by a pair of lock nuts threaded around its rearwardly projecting end adjacent said stop ring, and a compression spring mounted around said tap bolt intermediate said collar and said stop ring bearing against said collar at its one end and against said stop ring at its other end, a lock ring slidingly mounted around said nozzle adjacent the rearward end of said cylindrical member, said lock ring and said cylindrical member being connected by bolt means, and a stufiing gland disposed subjacent the rearward end of said cylindrical member, said gland being held in position intermediate said cylindrical member and the outer surface of said nozzle by said lock ring.

CHARLES M. GUY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS I Number Name Date 1,781,796 Wilcox et al Nov. 18, 1930 1,905,772 Walton Apr. 25, 1933 2,034,932 Whitcomb Mar. 24, 1936 2,127,073 Topping Aug. 16, 1938 2,297,302 Hornschuch Sept. 29, 1942 2,362,436 Stratford Nov. 7, 1944 2,494,887 Lenhart Jan. 17, 1950

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