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Publication numberUS2604358 A
Publication typeGrant
Publication dateJul 22, 1952
Filing dateApr 22, 1948
Priority dateApr 22, 1948
Publication numberUS 2604358 A, US 2604358A, US-A-2604358, US2604358 A, US2604358A
InventorsEdwin R Richards
Original AssigneeUnited States Steel Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for cleaning furnace checker works
US 2604358 A
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Description  (OCR text may contain errors)

y 22, 1952 E. R. RICHARDS 2,604,358

APPARATUS FOR CLEANING FURNACE CHECKERWORKS Filed April 22. 1948 9U illlll IN I 'EN TORI 0 1W 2?. How/905,

Patented July 22, 1952 APPARATUS FOR CLEANING FURNACE CHECKERWORKS Edwin E. Richards, Provo, Utah, assignor to United States Steel Company, a corporation of New Jersey Application April 22, 1948, Serial No. 22,528 ZiClaims. (01. 299-47) This invention relates to apparatus for cleaning checkerwork in furnaces, particularly in open hearth steel-making furnaces.

During operation of open-hearth furnaces, debris such as flue dust accumulates in the checker- Work, which therefore must be cleanedregularly. In previous practice with which I am familiar, the checkerwork has been cleaned by fluid, such as steamor compressed air, introduced through lances which are manually handled. The pressure and temperature of the fluids must be relatively low. Therefore such cleaning practices not only have been uncomfortable and hazardous for workmen, but also have been slow and in.- efficient.

An object of the present invention is to provide improved apparatus for cleaning checkerwork in which the lances for introducing steam or air are handled mechanically, making possible the use of higher fluid pressures and temperatures and thereby overcoming the principal disadvantages of past practices.

A further object of the invention is toprovide improved apparatus for cleaning checkerwork, such apparatus including mechanical means of sturdy and simple design for handling the lances and being readily portable.

In accomplishing these and other objects of the invention, I have provided improved details of structure, a preferred form of which is shown in the accompanying drawing, in which:

Figure l is a side elevational view of an improved apparatus for cleaning checkerwork embodying features of the present invention;

Figure 2 is an end elevational View of the apparatus;

Figure 3 is a top plan view of one form of nozzle which may be used with the apparatus shown in Figures 1 and 2;

Figure 4 is a vertical sectional view of the nozzle shown in Figure 3;

Figure 5 is an elevational view of a modified form of nozzle that may be used with the apparatus; and

Figure 6 is a sectional view on line VI-VI of Figure 5.

Referring more in detail to the drawing:

The apparatus illustrated comprises a portable chassis lll, which preferably travels on rails l2 parallel to a furnace wall 13 as illustrated. The chassis may be moved along the rails manually or may be propelled by any suitable mechanical means, not shown. The chassis carries an upright frame I. An elongated boom I5 is hinged to the upper extremity of frame 14 and may thus be turned to facilitate maneuvering the apparatus. The boom preferably is formed of a'cylindrical pipe. Preferably when the apparatus is in position for cleaning checkerwork the outer end of the boom is slidably supported on a rail I5 fixed to the furnace wall. The weight of the chassis is suflicient to balance the weight of the boom as long as the lance, hereinafter described, is retracted.

A trolley I1 is supported on boom 15 for movement longitudinally of the boom. Preferably the trolley includes rollers 18 which have grooved circumferences engaging the top and bottom of the boom to facilitate movement of the trolley. Adjacent its outer'end the boom carries a stirrup l9 which preferably has an anti-friction roller 20. A tubular lance ,2! is fixed adjacent its, rear end to trolley I 1 and is slidably received on roller 20. in stirrup 19. The forward end of the lance carries a nozzle 22 hereinafter more fully described. The rearward end of the lance has a connection 23 to which is attached a steam or airinlet hose 24. y The forward portion. of boom l5 carries a sheave 25. Upright frame 14 carries a two-pulley sheave 26 near its upper portion. A reversible power driven winch 2! is supported on chassis H]. A cable 28 has one end attached to trolley I l and extends around sheave 25 on the boom, thence back around one pulley of sheave 25 on the upright frame, and around winch 21 on the chassis. A second cable 29 has one end attached to trolley I1 and extends around the other pulley of sheave 26 and around the winch. It is seen that rotation of the winch projects or retracts the trolley and lance longitudinally of the boom depending on the direction of rotation. Winch 21 is driven by a reversible motor 30, through suitable speed reducing gearing.

The details of nozzle 22 are shown in Figures 3 and 4. The nozzle is of the pan type and has a rectangular chamber 3|, the rear wall of which is attached to the lance. The bottom wall of the chamber has oblique orifices 32 through which fluid, such as steam or compressed air, is directed into the checkerwork. The oblique direction of the orifices enables the fluid to clean horizontal surfaces as well as vertical surfaces. The for- Ward and rearward ends of the nozzle have rounded buffers 33 and 34 to prevent damage to the checkerwork from scraping by sharp edges.

The modified nozzle shown in Figure 5 is of the bullet type and comprises a cylindrical body 35 which has outlet orifices 36. Preferably the forward end of the body is tapered to prevent damage to the checkerwork.

It is seen that the apparatus of the present invention projects and retracts the lance in or out of the checkerwork mechanically and thus eliminates need for workmen to handle lances manually and makes possible the use of higher fluid pressures and temperatures. The apparatus may be moved about to desired locations on its track. The diflerent types of nozzles provide suitable means for cleaning different forms of checkerwork.

While I have shown and described only a single embodiment of the apparatus, it is apparent that modifications may arise. For example, it is possible to utilize the principle of cleaning checker- Work with lances handled mechanically by other types of handling mechanism. While the cable and sheave mechanism is preferred, I do not intend necessarily to exclude other handling mechanisms that are functionally equivalent. Therefore, I do not wish to be limited to the disclosure set forth but only by the scope of the appended claims.

I claim:

1. An apparatus for cleaning furnace checkerwork comprising a movable chassis, an upright frame on said chassis, an elongated boom supported by said frame, an elongated tubular lance, a nozzle carried by the forward end of said lance, a hose connection carried by the rearward end of said lance for introducing fluid to said lance, a trolley fixed to the rear portion of said lance and movably carried by said boom, a stirrup carried by the forward portion of said boom and movably carrying said lance, a sheave earriedby the forward portion of said boom, a two-pulley sheave adjacent the rear of said boom, a reversible power driven winch on said chassis, a cable having an end attached to said trolley'and extending around said first named sheave, back around one pulley of said second named sheave and around said winch, and a second cable having an end attached to said trolley and extending around the other pulley of said second sheave and around said winch, rotation of said winch projecting and retracting said lance longitudinally of said boom.

2. An apparatus for cleaning furnace checkerwork comprising a movable chassis, an upright frame fixed to the rearward edge of said chassis, an elongated cantilever boom hinged to the upper end of said frame, an elongated tubular lance, a nozzle carried by the forward end of said lance, a hose connection carried by the rearward end i of said lance for introducing fluid to said lance,

a trolley fixed to the rear portion of said lance and movably carried by said boom, a stirrup depending from the forward portion of said boom and movably carrying said lance, a sheave carried by the forward portion of said boom, a two pulley sheave adjacent the rear of said boom, a reversible power driven winch on said chassis, a cable having an end attached to said trolley and extending around said first named sheave, back around one pulley of said second named sheave and around said winch, and a second cable having an end attached to said trolley and extending around the other pulley of said second named sheave and around said winch, rotation of said winch projecting or retracting said lance longitudinally of said boom, said chassis and frame balancing the weight of said boom and lance as long as the lance is retracted, the outer end of said boom being supportable for balancing this weight when the lance is projected.

EDWIN R. RICHARDS.

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

UNITED STATES PATENTS Number Name Date 669,377 Bacon Mar. 5, 1901 757,522 Van Doren Apr. 19, 1904 1,020,979 Hay et a1 Mar. 26, 1912 1,268,911 Ziesing et al June 11, 1918 1,661,931 Dolan Mar. 6, 1928 2,441,112 Hibner et al. May 4, 1948

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US669377 *May 5, 1900Mar 5, 1901Addison M BaconCoke-drawing apparatus.
US757522 *May 25, 1903Apr 19, 1904Chester J Van DorenCement-kiln-cleaning machine.
US1020979 *Jan 13, 1911Mar 26, 1912Robert HayCoke-sprinkling apparatus.
US1268911 *Jul 13, 1916Jun 11, 1918Grasselli Chemical CoCleaning apparatus for retorts.
US1661931 *Jan 17, 1923Mar 6, 1928James Dolan JohnPortable soot blower
US2441112 *Jun 9, 1944May 4, 1948Vulcan Soot Blower CorpRetractable soot blower
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2789296 *Jul 15, 1954Apr 23, 1957Cheadle Joseph CFlue cleaning apparatus
US2877480 *Aug 4, 1954Mar 17, 1959John P FoxGlue gun
US3027095 *Mar 22, 1961Mar 27, 1962Paasche Jens ASpray coating machine
US3084921 *Jan 13, 1961Apr 9, 1963Louis A GrantChecker chamber cleaning apparatus
US3138819 *Feb 9, 1961Jun 30, 1964Babcock & Wilcox LtdFluid heater cleaners
US3396855 *Oct 1, 1965Aug 13, 1968Quigley CoApparatus for use in applying refractory coatings to refractory linings of small basic oxygen furnaces
US3477085 *Sep 19, 1966Nov 11, 1969Jean Eugene Julien DulaitSoot blowing devices
US4165552 *Jul 27, 1978Aug 28, 1979Diamond Power Specialty CorporationSoot blower drive mechanism
US4387481 *Feb 17, 1981Jun 14, 1983White Consolidated Industries, Inc.Soot blower
US4635314 *May 1, 1986Jan 13, 1987Itt CorporationArrangement for removing glass soot from an exhaust tube during optical preform fabrication
US4679620 *Feb 28, 1986Jul 14, 1987Daun Klaus DieterMethod and apparatus for cleaning plate heat exchangers used for recovering heat from exhaust gases
US4757785 *Feb 19, 1987Jul 19, 1988The Babcock & Wilcox CompanySteam generator sludge removal apparatus
US5002120 *Mar 8, 1990Mar 26, 1991Boisture Thomas BMulti-lance tube cleaning system
US5022463 *Nov 1, 1990Jun 11, 1991Ohmstede Mechanical Services, Inc.Multi-hose flexible lance tube cleaning system
US5067558 *Oct 19, 1990Nov 26, 1991Ohmstede Mechanical Services, Inc.Multi-lance tube cleaning system
US5129455 *Oct 19, 1990Jul 14, 1992Ohmstede Mechanical Services, Inc.Multi-lance tube cleaning system having flexible portions
US6802710Jun 18, 2002Oct 12, 2004Paul Wurth S.A.Multiple hearth furnace
WO2003002925A1 *Jun 18, 2002Jan 9, 2003Patrick HutmacherMultiple hearth furnace
Classifications
U.S. Classification239/753, 239/567, 134/172, 165/95, 134/24, 15/317
International ClassificationF27D25/00, F27D3/16, F27B3/26
Cooperative ClassificationF27D25/008, F27B3/263, F27D3/16
European ClassificationF27D25/00C