US1946443A

US1946443A - Fuel distributing system

Info

Publication number: US1946443A
Application number: US493762A
Authority: US
Inventors: John H Ichter
Original assignee: Standard Stoker Co
Current assignee: Standard Stoker Co
Priority date: 1930-11-06
Filing date: 1930-11-06
Publication date: 1934-02-06
Anticipated expiration: 1951-02-06

Description

Feb. 6, 1934. J. H. ICHTER FUEL DISTRIBUTING SYSTEM F1166 Nov. 6, 1930 2 Sheets-Sheet, 1

lnl lnl ull 11 .INVENTOR.

ATTORNEY.

Feb. 6, 1934. ICHTER 1,946,443

FUEL DISTRIBUTING SYSTEM Filed Nov; 6, 1930 2 Sheets-Sheet. 2

INVENTOR I L f0/zlz 1?. Elder ATTORNEY Patented Feb. 6, 1934 roar. nrs'rarnnrrnc SYSTEM John H. Hchter, Ashley, Pa, assignor to The Standard Stoker Comp poration of Delaware any, incorporated, a cor Application November 6, 1931). Serial No. 193,762

1 Claims.

This invention relates to fuel distributing mechanism for a stoker and particularly for locomotive stokers in which fuel is scattered over a firebox in aerial paths.

It is an object of the invention to provide a novel fuel distributing system in stokers of the type described in which fuel containing a quantity of fines is used, whereby stack loss is reduced to a negligible amount, and more particularly it is an object to provide in a fuel distributing system, a deflector plate so positioned and arranged with respect to a distributor plate and means for projecting fuel thereover as to defiect the upper I strata of fuel downwardly thereby preventing the fines from being blown over the firebox arch and up the stack. v

It is another object of the invention to provide a novel fuel distributing system having a deflector plate pivotally mounted above the fuel stream and adjustable therein to deflect the upper strata of fuel downwardly whereby a reduction in steam pressure for distributing fuel over the fire is made possible.

Other advantages and objects of the invention will be apparent in the course of the description and the invention therefore further consists in the parts and arrangement of parts as illustrated in the accompanying drawings, in which Fig. 1 is a central longitudinal vertical section of a portion of a locomotive and a stoker therefor showing the invention in place thereon;

Fig. 1a is a side elevation of a portion of the stoker showing the-defiector.plate and control mechanism therefor in side elevation;

Fig. 2 is an enlarged detail view of a portion of Fig. 1 showing the distributing mechanism;

-Fig. 3 is a section takenon the broken line 33 of Fig. 1;

Fig. 4 is a section taken on the broken line 44 of Fig. 2; and

Fig. 5 is a section taken on the line 5-5 of Fig. 1a.

The invention is particularly applicable to stokers for use with locomotives and'for the pur-. pose of best illustrating the invention it will be so described, but its use is not limited to such application for it is equally applicable to stokers used with other furnaces where like conditions prevail.

Referring now to the drawings, the locomotive is generally designated at 10, its main supporting frame at 11, its firebox at 12, having grates 13 and the backhead or rear wall 14 with a firing opening 15 therein. The fiues 16 project forwardly from the flue sheet 17 at the front end (Cl. 110-101) g of'the firebox 12. A smoke arch 18 supported on the customary arch tubes 19 projects backwardly and upwardly through the firebox 12. A suitable stoker, indicated as a whole at 20 is provided for conveying the fuel from a source of supply and w delivering it to the firing opening 15. The part of the stoker mechanism illustrated comprises a riser conduit 21 which, as is well understood and therefore not shown, is at the forward end of a series of conduit elements leading from a source of fuel supply such as the tender of a locomotive.

The conduit 21 is provided with a detachable hood section 22 which may be secured to the conduit 21 through thefianges 50 and 51 of the conduit and hood respectively, by suitable fastening means. The hood 2 is provided with a centrally located door 23 hinged at its upper end, as at 24 to the hood and held in closed position by suitable locking means as'at 25. The upper end of the conduit 21 communicates with the lower 7 portion of the firing opening, the upper portion of the opening being closed by the customary fire door 26. The fire door and hood section of the conduit form a closure for the firing opening and access may be had to the firebox for hand firing tributor plate and outside of the firebox. Pressure fluid such as steam is supplied by a desired number of supply pipes 30 and issues from the distributor head through the jets 31 and across the surface of the distributor plate. The forward side portions of the plate 27 are provided with the pockets 32, 32a and the J-sha'ped ribs 33, 33a which intercept a portion of the fuel and direct it to the rear corners of the firebox.

There is a tendency in stokers of the scatter feed type to deflect more or less of the fines in the coal over the firebox arch, since the intensity of the blast necessary to project lump fuel to the forward end of the firebox, is more than is necessary to distribute the fines in the coal and it is carried into the stack unconsumed. This so-called stack loss constitutes not only an economic loss, but creates a nuisance as well, since the unconsumed particles of fuel are carried back to the coaches causing discomfort to passengers. Dust and dirt deposited in the wake of the train cause a further nuisance.

My novel combination of fuel distributing mechanism overcomes these disadvantages by so arranging and constructing the parts that the fines in; the coal are deflected down on the fuel bed and consumed without interfering with the normal even distribution of coarse fuel over the flrebed.

For this purpose there is provided a fuel deflecting plate 34 extending forwardly from a point in the upper portion of the hood section 22 through the firing opening and above the distributor plate 27. The deflector plate 34 is fixedly mounted on a transverse shaft 35 and arranged to swing or tilt vertically with the shaft as an axis to different positions so'that it may be adjusted at any angle from the horizontal. The top of the deflector plate is provided with the ribs 36 to prevent warping. The transverse shaft 35 is mounted in the bearings 37 in the sidewalls of the hood section 22 and positioned above the fuel stream, slightly forward of the jets 31 and the normal line of repose of the fuel delivered through the conduit 21 permitting unobstructed discharge of fuel onto the distributor plate. The fuel rises in a core shaped mass through the riser conduit 21 and at the bend in the upper end thereof the force of gravity causes the core shaped mass to break and fuel tumbles over the distributor head ontothe distributor plate. The line where this break occurs is termed the normal line of repose of the fuel. A notched quadrant 38 is secured by suitable means, as by the bolts 39, to one outside wall of the riser conduit, preferably the side at which the flreman is stationed. A handle 40 is secured to the shaft 35 and is provided with a recess 41 arranged to receive a pin 42 and a coiled spring 43. The pin 42 engages the notches in the quadrant 38 and remains in engagement by the force exerted by the coiled spring 43. It will be seen that by moving the handle 40, the shaft 35 is turned thereby swinging the deflector plate upward or downward depending upon the direction in which the handle is moved, and the pin and notched quadrant cooperate to hold the deflector plate in, any desired position.

In operation the fuel is deliveredthrough the riser conduit 21 over the distributor head 29 onto the distributor plate 27 into the zone of action of the pressure fluid blast issuing from the distributor head. The intensity of the blast and the configuration of the plate cooperate to distribute coarse fuel over the entire flrebed area. The fine fuel, a considerable amount of which would ordinarily be carried over the arch of the firebox by a blast of such intensity, is held and directed downwardly by the deflector plate 34 preventing the fines from escaping through the stack unconsumed.

This improved fuel distributing system also permits the reduction in the amount of steam for projecting the fuel, since the various streams that 'ordinarily are projected upward are held down by the deflector plate and help deliver fuel to the flrebed.

Throughout the description and claims it will be understood that the terms front and forwardflas applied to the furnace and stoker are used with reference to the direction of fuel delivery i. e., from back to front.

I claim:

1. In a furnace having a firebox and a firing opening, a fuel conduit communicating with the lower portion of said firing opening, a distributor plate mounted in said firing opening for receiving fuel'from said fuel conduit, means at the rear of said plate arranged to project fuel thereover, laterally curving fuel deflecting abutments on the forward corners thereof for directing fuel to the rear'cornersand sides of the firebox, a fuel deflecting plate positioned above said distributor plate and extending forwardly beyond said fuel projecting means, said deflecting plate being mounted at its rearward end in the upper portion of said fuel conduit and arranged toswing vertically about said rearward end, and means without said conduit for adjusting said deflecting plate and securing it in any one of a number of positions.

2. In a furnace having a firebox and a firing opening, a fuel conduit communicating with the lower portion of said firing opening, a distributor plate mounted in said firing opening for receiving fuel from said fuel conduit, means thereon for deflecting fuel to all parts of said firebox, means at the rear of said plate for projecting fuel forwardly across said distributor plate, a fuel deflecting plate pivotally mounted at its rearward end in said fuel conduit above the fuel path and extending forwardly through said firing opening, and means without the conduit for adjusting said deflecting plate and securing it in any one of a number of positions to deflect the upper strata of projected fuel downwardly.

-3. In a-furnace having a firebox and a firing opening, a fuel feeding conduit communicating with the lower portion of said firing opening, a fuel distributor plate mounted in said firing opening for receiving fuel from said fuel conduit, means thereon for deflecting fuel to all parts of said firebox, means at the rear of said plate for projecting fuel forwardly across said distributor plate, a transverse shaft rotatably mounted in the upper portion of said fuel feeding conduit, a deflecting plate fixedly secured to said shaft and extending forwardly therefrom through said firing opening and forward of said fuel projecting means, and means cooperating lower portion of said opening, a distributor plate positioned in said opening for receiving fuel from said conduit, a distributor head disposed rearward of the forward end of said plate for discharging a pressure fluid thereover, a fuel deflecting plate pivotally mounted at its rearward end in said fuel conduit above the fuel path and extending forwardly through said firing opening above said distributor plate and beyond said distributor head, said deflecting plate having a flat under surface and a ribbed top surface, and means without the conduit for raising and lowering said deflecting plate about its pivotally mounted end and securing it in any one of a number of positions to deflect the upper strata of projected fuel downwardly.

JOHN H. ICHTER.