US2445050A - Clinker oven - Google Patents

Description

July 13, 1948. D. H. WILHlTE CLINKER OVEN Filed Aug. 28, 1946 2 Sheets-Sheet 1 INVENTOR.

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Patented July 1 3, l94

CLINKER OVEN Don H. Wilhitc, Kirksville, Mo., assignor to Ralph Eggert, Adair County, Mo.

Application August 28, 1946, Serial No. 693,422 11 Claims. (Cl. 126-242) The present invention relates to clinker ovens,

and is particularly concerned with an improved device by means of which clinkers may be removed from stoker fired furnaces of all kinds and left to cool in such manner that the obnoxious gases are carried away by the natural draftof the furnace.

One of the objects of the invention is to provide an improved attachment for stoker fired furnaces which is adapted to be used upon practically all of the difierent types of furnaces on the market by being substituted for the firing door and hung upon the same hinge lugs from which this door may be removed, and by means of which the clinkers may be removed through the firing door and placed in this device for cooling to a condition which no longer involves the high temperatures or obnoxious gaseswhich are present when the clinker is first removed.

the fire pot are still in full view, and so that they r are readily accessible through the opening in'the clinker oven.

Another object of the invention is to provide an improved clinker. oven which may be arranged with its ash drawer for right-hand or left-hand removal, and which is so arranged that the ash drawer chamber is automatically kept clean, all ashes and parts of the clinker falling into the removable ash drawer. I

Another object of the invention is to provide an improved clinker oven for stoker. fired furnaces of all kinds, which is sturdy,- simplein structure, efficient, and adapted to be manufactured at a very low cost, so that it may be sold at a price which is within the range of a large number of the purchasing public. I

Other objects and advantages of the invention will be apparent from the following description and the accompanying drawings, in which similar characters of reference indicate similar parts throughout the several views. H

Referring to the drawings, ofwhich there are two sheets, 7

Fig. '1 is a sideelevational view of a stoker fired .furnace' providedwith a clink oven ying vention. g I,

Fig. 2 is a fragmentary side elevational view on a larger scale, with certain of the parts in partial section to show the details of structure.

Fig. 3 is a'front elevational view of the clinker oven attachment with parts of the housing broken away to show the internal structure.

Fig. 4 is a horizontal sectional view taken on the plane of the line 4-4 of Fig. 3 looking in the direction of the arrows.

Fig. 5 is a fragmentary sectional view taken on the plane of the line 5- 5 of Fig. 3 lookingin the direction of the arrows, and showing the details of structure of -the hinge door stop for the upper or connecting section of the oven.

Referring to Fig. 1, this is a diagrammatic view showing the complete installation in which Ill indicates generally the stoker fired furnace, H the stoker, and 12 the feed tube from the stoker to they furnace in a front fired installation. I3 indicates in its entirety the clinker oven, which preferably comprises an upper or connecting section I4 and a lower or clinker receiving housing The housing [5 preferably comprises a rectangular sided sheet metal housing which is provided with a door H5 at one end. The housing Illpreferably has an open top which is bordered by an inwardly projecting flange I! or a top wall ll having a rectangular opening l8. The rectangular opening I8 is small enough so that the flange ll of the top wall overlies the ash drawer I9 to prevent ashes or clinker parts from falling between the ash drawer l9 and the housing l5. Aperture I8 is preferably rectangular in shape, but smaller than the top opening area of the ash drawer. 7

In addition to the open top wall ll, the housing I5 comprises a pair of side walls 2D, 2!, and end Wall 22, and a bottom Wall 23. In some embodimerits of the invention the top wall I! may be formed by bending over parts of the side and end walls, and three of the. walls, such as the rear wall ill, bottom wall 23, and front wall 2!, may consist of one integral piece bent into proper shape. In otherv embodiments of the invention allof these walls, ll, 20, 21, 22, may consist of separate pieces of sheet metal, such as steel, which are welded together at their corners to provide a substantially air-tight compartment.

The top wall. I! of the lower housing 15 may be formed by the lower portion of a U-shaped member which forms the upper connecting portion l4. Such a U-shaped member may include, beside the bottom portion ll of the U, a pair of the upper opening l8.

the housing to the upper corner 29 adjacent the fire door opening, and these beveled edges" are engaged by a suitable door 36 which may-be hinged to the side wall 25. The opening for the door 30 may be framed by the top member 23,

side walls 24 and 25, and at its lower edge byia special V-shaped angle member 3| which may, in some embodiments of the invention, be turned up and form an integralpart of the wall ll.

' The. door 30. preferably comprises a substantially, rectangular metal member which is provided with hinge lugs 32, 33, projecting from its right-hand edge, and provided with apertures for receiving. the hinge pintle 3.4.. The. side wall 25 of the upper housing portion 14 is also provided with outwardly projecting hinge lugs 35, 36, suitably located to engage the lower sides of the. hinge lugs. 32,33, and-provided with registering apertures for the pintle rod 34.

The hinge lugs 32, 3.3 are welded to cover 30, while hinge lugs 35, 36 are welded to side wall 25, and the lugs may be provided with a lateral extension having an upper stop surface 31 in each case for engaging the door 30 and holding it in open position.

Pintle rod 34 may consist .of a cylindrical steel rod of suitable size having a laterally turned upper end 38 serving as a thrust member to determinethe final position of the rod in the hinge lugs. At its left .end the door .30. is preferably provided with a suitable pivoted latch 39. This latch may consist of a strap of steel pivotally mounted at .40 on the cover 3.!) by means of a rivet, and having its end projecting beyond the cover to engage a keeper 4|. A handle strap 42 is, preferably bent to U-shape, and has its attaching flanges riveted to the latch strap. 39.

A stop member 4?..for the. latch may also be of substantially U-shape, and may pass through the handle strap 42 and have its. attaching flanges riveted to the, cover 3!] at each end 44. The keeper 114.! may consist of astrap of steel, which has one side welded to the. side 24, and which projects outwardly beyond the adjacent edge of the cover 30.

Just beyond the beveled edge 21 of the side wall 2-4 the keeper 4| is provided with a rectangular slot 45, the outer wall of which serves as a retaining shoulder for engaging the latch 39.

The operation of the latch will be apparent from its structure, as it is urged into latching position'by gravity, and it may be unl'atched by lifting on the. handle '42.

"The'lower housing I5 is preferably provided with an inwardly turned flange 46 surrounding Flange 46'and flange l'i are provided with a plurality ofregularly spaced apertures, such as an aperture at each corner, for. receiving screw bolts 41 having nuts 48, by means of which the lower housing is hung from the upper or connecting housing l4.

Thepresent clinker oven is preferably so :constructed that itmay replace the. ordinary firing door on the furnace on which it is intended to be used. For this purpose the rear opening 49 in the upper housing, I4 is preferably of the same size as the opening for the firing door. Thus the edge of the opening 49 engages the firing door opening on the furnace in the same manner as the firing door.

In order to provide for the support of the assembly on the firing door hinges the upper housing I4 is provided with a pair of hinge lugs 58 welded to the side wall 22 adjacent the opening .49, and provided with aligned apertures 5| for receiving a pintle rod similar to the pintle rod 34, this being the pintle rod which formerly supported the firing door.

- The lugs 50 may then engage similar hinge lugs .on thefiring door frame of the furnace Ii), and

the attachment is pivotally supported in the same way that the firing door was before its removal. At its side opposite to the hinge lugs '59 the side wall24 is provided with a short angle member 5.2 welded .to the side wall and projecting far enough to engage the keeper 53 carried by the wall of the furnace H]. In this case the looseness of the pivotal support at the hinge lugs 50. is sufficient to permit the whole assembly to be lifted slightly at its left side until the latch 52 engages the keeper 5.3 on the firing .door frame.

Instead of being supported on the floor, as in some of the devices of the prior art, the ash housing i5, is thus carried from the connecting portion i l of the housing, and may be short enough to clear the coal feed tube 12 from a front stoker installation. A h housing 55 is also provided with a door it at one end, and this door is provided with hinge lugs 54 having apertures for receiving pintles 5.5, which also' pass through the hinge lugs 56 on the front wall 2| of the lower housing l5. In this case the pintles 5 5 are riveted in place, but may also consist of one single pintle rod 34, if desired.

The ash housing door It may be provided with alatch 5] at its left side (Fig. 2), and a rear wall '20 with a keeper 58 for engagement with the latch 51. In this case the latch 51 maybe pivotally mounted upon an angular bracketm5 9, and may have a groove 60 for engagement with the keeper5'8 carried by the rear wall 20. Thence the lower section I5 is supported by bolts and nuts 41, 48 on the upper housing Hi. It will be apparent that it may be attached with the door I6 opening toward the left side of the furnace or the right side of the furnace,whicheverlocation is most desirable from the point of view of removal of the drawer l9 The clinker drawer l9 may consist of a sheet metal member preferably constructed of sheet steel of suitable gauge, like all of the other housing members anddoors. Clinker drawer [9 comprises a'bottom 6|, front and rear walls 52, 63, and end walls .64, 65. The end wall 64, which faces the opening .Closed by the door 16, is preferably provided with a, handle 65a, which may consist of a U-shaped member having its laterally turnedends pivotally mounted in lugs '66 carried by the end wall 64. Thus handle 65 swings downward when not needed, and enables the use of-the full space the clinker drawer l9.

In order to carry the clinker drawer 19. once it has been removed by means of the handle 65, it is preferably provided with a bail :61 which may consist of a U-shaped steel rod having its outwardly turned ends 68 pivotally mounted inaperia h sie f tures m' the side wausszgss' or the clinker drawer I9. The legs of the 'U-shape'd bail 61 spring outward to retain the trunnions 68 in their aperbetween the ends of the drawer to achieve a balance. In some embodiments of the inventio a pair of bails may be used. r The length of the legs of the bail 61 is preferably such that the bail tips over into engagement with the end wall 64 adjacent its upper edge, as shown in Fig. 3, but beneath the flange I1, so that the bail does notinterfere with the dropping clinkers.

. The sides and bottomof the clinkerdrawer H] are welded together at their edges, and may-be formed out of one or more pieces, as desired.

In order to protect the door 30 of the upper housing [4 from heat it is preferably provided 'with a bafiie plate 69 similar to the bafiieplates usually employed upon the firing door! This may consist of a plate, of sheet metaL such as steel,

flwhich is spaced from the door 30 byv tubular sleeves"!!! carried by the bolts H, which may be locatedat each of the corners of ,the baflie plate.

Bafiie plate 69 may have suitable apertures which are staggered with respect to the'damper openings 12 in the door 30, whichare adapted to be closedby means of a suitable sliding damper I3 actuated by a. knob 14 carried-by a bolt extending through a slot 15. The damper openings 12 and damper 13 may be similar to that employed on the firing door-which this attachment is intended to replace- 3 w a The operation of my clinker oven is as follows: The firing door upon the furnace lllmay be removed and the same pintle rod utilized for securing the present attachment in its place. The attachment is then swung around until its latch I 52 engages the keeper 53 on the furnacain which position the edges of the upper housing [4 engage 1 the edges of the'firing door opening quite closely to effect a substantial closure. However, the closure canbeimade air-tight by means of suitable initially plasticfurnace' cement, and thus the leakage of air at thisv point can ,be reduced to a minimum. This is of. importance when the stoker l lis actuallygoing, and the forced air feed causes an increase of .pressure inside the furnace which might otherwise resultin the smoke leaking out through the connection between the clinker oven and the furnace. 1

' When the furnace is to beserviced and clinkers and on account of the bevel of the "upper edges 21 of the side walls 24 and 25, a full view of the interior of the furnace is permitted, and the operator may reach in with his clinkertongs in -substantially the same manner as .he could be- .fore the attachment was placed on the furnace.

While this isbeing done, the door 30 is sup- I portedin its open position .upon the door stops .31, and the clinkermaybe drawn out of the firing door into the upper housing section l4 and dropped innnediatelyainto theclinker drawer [9 be handled by the present'clinker ovenwithout breaking, as the full' area of the firing door is available for" clinkerremoval." In any event,

' should the clinkerbe toolarge to pass through by afew blows with the clinker tongs, causing it to drop into the clinker drawer l9.

When ash is removed, a shovel or suitable tool may be employed, and the ash need only be moved as far as the opening l8 when it may be dropped I the clinkers and ash have been removed, the door is then closed, and the clinkers and ash are pref erably left there to cool until the next cleaning operation, when the door I6 may be opened for removal of the clinker from the lower housing [5.

The device is preferably made of relatively heavy gauge steel, adapted to withstand the heat of the clinkers without substantial damage or deformation. Whilethe clinker is cooling, the gases which pass off from it are drawn into the furnace by the natural draft which takes place between operations of the stok-er, air finding its way into the space surrounding the clinker through the leakage of the doors. In any event, such gases tend to pass upward out of the opening l8 and into the fire door, and the amount of smoke or gas escaping into the room is reduced to a minimum.

To remove the drawer it is only necessary to lift the latch 51 and then to pull upon the drawer handle 65 until the bail .61 is accessible.

The clinker'now having cooled, the entire assembly will be cool, and the bail may be grasped and used for carrying the clinker drawer outside, to be emptied at any suitable point.

a In some embodiments of the invention the device may be provided with a pair of drawers, one being available to replace the other immediately,

so that it is not necessary to empty the drawer precise details of construction set forth, but desire or ash removed, the door 30 may then beopened,

to avail myself of all changes within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is: i

l. A furnace installation comprising a furnace having a firing door opening surrounded by a frame, hinge mean-s carried by said frame, and a clinker disposal unit, said unit being provided with complementary hinge means for engaging said frame hinge means to pivotally secure said unit to the frame and enable said unit to be swung away from said opening and comprising an upper Y housing section and a lower housing section, the

lower housing section being provided with an upper opening communicating with the upper housing section, and the upper housing section being provided with a door on its forward side for access to both the fire door opening and the lower housing section, whereby a. clinker or the like may be removed from the furnace and dropped into the lower housing section.

2. A furnace installation comprising a furnace having a firing door opening surrounded by a frame, hinge means carried by said frame, and a clinker disposal unit, said unit being provided with complementary hinge means for engaging the fire door frame and comprising an upper housing section and a. lower housing section, the

' lower housing section being provided with an the opening I8, it may" be broken at'that point 'housingsection,

upper opening communicating with the upper and the upper housing section having a keeper at the other side opposite to the hinge lugs for engagement with a fire door latch, the fire door being removed, a clinker disposal unit comprising a member provided at its upper rear end with box-like walls located to en age the fire door opening frame, hinge lugs on one of said box-like walls, and having apertures adapted to register with the apertures of the hinge lugs on the fire door opening frame, a pintle passing through all of the hinge lugs, a latch carried by the opposite box-like wall and located to engage the keeper on the fire door opening frame, said box-like walls having a lower opening in the lowermost of said walls, and a container depending from said box-like walls and communicating with said opening for receiving a clinker which is withdrawn from the fire door opening and dropped into said container, said box-like walls having their rear side opposite to the furnace provided with an opening and a pivoted closure for said opening, the said opening extending diagonally toward the furnace and upward, whereby when the closure is open a standing operator may look into and downwardly into the furnace through the fire door opening, and may insert a straight clinker tong through the diagonal opening and the fire door opening to grasp a clinker located below the door opening.

DON H. WILHITE.

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

UNITED STATES PATENTS Number Number Name Date Walker Aug. 13, 1861 Woodruff Mar. 14, 1871 Van Duzen May 12, 1885 Lind Oct. 1'7, 1922 Pefier Dec. 12, 1922 Schellcrosslee Nov. 2 1933 Glenn Oct. 30, 1934 Burch Mar. 24, 1936 Franke May 3, 1938 Herndon Oct. 10, 1939 McIntire July 30, 1940 Richardson June 3, 1941 Anderson Oct. 3, 1944 FOREIGN PATENTS Country Date Great Britain 1910 Sweden Oct. 6, 1936 Germany Dec. 10, 1904

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