US2088925A

US2088925A - Fuel deflecting mechanism

Info

Publication number: US2088925A
Application number: US659921A
Authority: US
Inventors: Morton F Robertson
Original assignee: Standard Stoker Co
Current assignee: Standard Stoker Co
Priority date: 1933-03-07
Filing date: 1933-03-07
Publication date: 1937-08-03
Anticipated expiration: 1954-08-03

Description

13mg, :3, 1937. M. F. ROBERTSON 2,088,925

FUEL DEFLECTING MECHANISM Filed March '7, 1953 2 Sheets-Sheet 1 I s v/ .FL 4 INVENTOR.

Mar tonfRober tson ATTORNEY.

Aug. 3, W3? M. F. ROBERTSON 2,@88,925

FUEL DEFLECTING MECHANISM Filed March 7, 1935 2 Shets-Sheet 2 1 INVENTOR. 30 flo/"tonffiobentson .7 BY I E4 5 {m ATTORNEY.

Patented Aug. 3, 1937 Morton F; Robertson, Chattanooga, Tenn; as-

Signor, by mesne assignments, to The Standard Stoker Company, Inc., corporation of Delaware New York, N. Y., a i

Application March '7, 1933, Serial No. 659921 This inventionjflrelates generally toa firebox constructionandparticularly to the firebox of a locomotive, thefiring opening-of which is pro- .vided with a fuel deflecting memb'er above the path of the introduced fueland firedoor, and it is an objector the invention to provide an arrangement whereby the deflecting member forms a shield for the fire door'against the heat of thefirein the firebox.

More specifically it is an object of the invention to provide a firebox having a firing opening with a-fuel" casing communicating with the lower portion of the opening, a fire door for the upper portionof the opening, a fuel deflecting member movably mounted in said opening above the path oi -the introduced fuel'and means for actuating thefire door and the deflecting memb913, 1-. i

It is another object of the invention to provide, in a structure of the: type described, an arrangementfor' simultaneouslyopening the fire door and moving the deflecting member to a position where it will not obstruct-the firing opening, and

for simultaneously closing the fire door andmoving thedeflecting member to its operative position. at

:;Further= objects of the invention reside in the details of construction of the deflecting member, the fire door and other parts, and the novel arrangement and combination of the parts as'will appear from the following description when read in conjunction with the drawings, in which Figure 1 is a vertical longitudinal section through a portion of the rearward end of a. locomotive showing the invention inelevation, with parts broken away, applied to the firebox of the locomotive;

Figure 2 Ba view of the structure of Figure l inrear elevation; and

Figure 3, is a sectional view 33 of Figure 1.

Figure 4 is a sectional 4-4 of Figure Figure'5 is a sectional view taken on the line 5-7-5-5 of Figure'2. l

- Throughout the description, the term forward is used to denote the general direction in View taken on the line which fuel passes through the stoker into-the'firedrawings, the invention is illustrated as applied to arlocomotive boilerhaving a backwall or rear water leg; Ill with a firebox; opening ll theretaken on the: line According to the construction shown in the V l a 9 Claims. (01. no 101) the firebox opening- I-l. Suitable means is provided for d'ischarging fuel to or into the lower portion of the firebox opening-as for example, by a stoker designated generally by thenumeral I 3; The stoker' l3'includes a fuel casing l l communicating \m'th the lower portion of the firebox openingll. I i The upper portion of the firebox opening, above the casing I4, is provided with an arched door frame l5 -on which is mounted a firedoor 16 comprising the door members llwhich meet upon the vertical center line of the fireboxopening and are pivoted upon pins l8 to swing laterally and vertically. The door members I"! when open permit hand firing of fuel and permit the insertion of a hook or poker throughthe firebox opening when raking or cleaning the fire.

Suitable means is provided for scattering fuel over the fire, and in the present instance there is shown a distributor plate [9 over which fuel is projected by pressure fluid issuing from a distributor head 20" located at the rear of the distributor plate I9. In scattering fuel over the firebedv in a firebox, particularly. over the firebed of a locomotive firebox, a comparatively large amount of fuel particles are carried through the stack unconsumed, causing, not only a very appreciable economic loss but also creating a nuisance by reason of the fact that the unconsumed particles are carried back into the coaches and deposited along. the right of way. To overcome these sources of economic loss and annoyance, the use of top deflectors which tend to hold the fuelidown closer to the firebed where they will be consumed,-has been proposed.

These difficulties have been overcome in a large measure by the use of top deflectors in conjunction with a distributor plate. However, in some of such constructions the top deflector has interfered with the use of a hook or poker in raking or cleaning the fire. In my construction when the fire door is opened preparatory to raking or cleaning the fire, the deflecting member 2 1! is arranged to be automatically raised about a pivot adjacent the top outer marginal edge of the'firebox to a position adjacent the upper marginalwedge of the firebox opening, providing an unobstructed opening sufficiently large toper mit-theinsertion of a hook or. poker therethrough. The firedoors Il may: be operated by a fluid pressure apparatus comprising acylinder 22, containing a piston 5 3-for actuating the doors l1,-

and a valve casing 23, containing a valve member- 24- for controlling the admission .of fluid to the pipe 25, and thepcylinder; 22 fromgjthe line 26.

rant of one of the doors and engages a pin 52 at its other end. The pin 52 extends through a slot in the wall of the cylinder 22 and is mounted in the piston 53. Admission of fluid pressure to the pipe 25 causes the piston 53 tomove toward the open end of the cylinder. Like movement is given to the quadrant 50 and the firedoors- I! are caused to swing open about the pins l8. The valve casing 23 is securely fastened to the valve. casing 21 in a suitable manner, as by the bolts 28 passing through the flange 29 and the valve casing 21 in turn is securely fastened tothe fiange: 30 of the stoker discharge casing M by suitable.

means, as by the bolts 3| passing through the flange 32.

Normally, the valve member 24 is seated, as.

shown in Figure 3, against the pressure of the fluid in the line 26 by the pressure of thespring.

33. In this position no pressure fluid is admitted through the pipe 25 to the cylinder 22 and the doors remain closed. When it is desired to open the doors I1 in order to rake the fire or for any other reason, the treadle 34 is depressed, which, through the

arms

35 and 36, raises the valve member 24 against the pressure of the spring 33. With the valve member 24 in its raised position, pressure fluid passes from the line 26, through the pipe 25 to the cylinder 22 opening the door members At the same time that pressure fluid passes from the line 26 to the pipe 25 to open the door members pressure fluid also passes through the port 31 depressing the piston 38 to its lower most position in the casing 21. The movement of the piston 38 is transmitted to the piston-rod 39 which in turn raises the deflecting member 2| to a position adjacent the upper marginal edge of the firebox opening through the link 40 and arm 4|. When the fireman removes his foot from the treadle 34, the valve member 24 is lowered by 50, the pressure of the spring 33, thereby cutting off the supply of pressure fluid to the pistonsoperating the door members I! and deflecting member 2|, respectively. Since the door members I! are hinged at their upper ends and the deflecting 55 member 2| is pivoted at its rearward end, the

overhanging weight of the doors causes them to close and the overhanging weight of the deflecting member causes it to drop back into its operative position in the firing opening.

6) The deflecting member 2| comprises the hollow flat plate-like forward portion 42 slightly less in width than the width of the firing opening, and a hollow rearward portion 43, of lesser width than the forward portion 42, formed with the 5 transversely extending tubular shaft 44. A pair of aligned

bearings

45 and 46 are preferably formed integral with and at the opposite upper sides of the top of the firedoor arch |5. The

tubular shaft 44 is in alignment with the bear- 70

ings

45 and 46 and a hollow shaft 41 extends 75 ing between the hollow rearward portion 43 and Alink 5| isattached at one end to the upper endof the quadthe tubular shaft 44 of the deflecting member 2| is provided with a plurality of perforations 48 to permit the introduction of air through the hollow shaft 41 into the hollow deflecting member 2|.;-, ,The deflecting member 2| is provided with perforations 49 through which air is drawn into the furnace by the draft in the firebox, thus a continuous stream of cool air passes through the deflecting member, materially increasing the life thereof and providing a source of air for effecting complete combustion of the fuel in the firebox.

The deflecting member also functions as a shield for the firedoor protecting it from the intense heat of the fire and may be employed as such in furnaces arranged for stoker or manual firing of fuel.

I claim:

1. In combination'with a firebox having a firing opening, a fuel casing communicating with the lowerportion of said opening, means for projecting fuelforwardly therefrom into said fireb0x,-a firedoor for the upper portion of said opening, a fuel deflecting member pivotally mounted at its rearward end and extending into said firebox and above the horizontal plane of the fuel projecting means, said fuel deflecting member being normally in a fixed position in the firing opening above the horizontal plane of the fuel projecting means, a pressure fluid operated piston for opening said fire door, a pressure fluid operated piston for raising said deflecting member about its pivotally mounted end, valvular means for simultaneously admitting pressure fluid to operate said pistons for opening said firedoor and raising said deflecting member, the

closureof said valvular means permitting the simultaneous closure of said firedoor and the return of said fuel deflecting member to its lowered position.

2. In combination with a firebox having a firing opening, a fuel casing communicating with the lower portion of said opening, means for projecting fuel forwardly therefrom into said firebox, a projected fuel deflecting member above the horizontal plane of the fuel projecting means and above the path of the fuel stream pivotally mounted at its rearward end, said fuel deflecting member being normally in a fixed position in the firing opening above the horizontal plane of the fuel projecting means, a firedoor for the upper portion of said firing opening, a fluid actuated piston, connections from said piston to said door for opening the same, a second fluid actuated piston, connections from said last named piston to said deflecting member for raising the same about its pivotally mounted end, valvular means for simultaneously admitting pressure fluid to said pistons for opening said firedoor and raising said deflecting member, the closure of said valvular means permitting the simultaneous closure of said firedoor and the return of said fuel deflect ing member to its lowered position.

3. In combination with a firebox having a firing opening, a fuel casing communicating with the lower portion of said opening, means for projecting fuel forwardly into said firebox in aerial paths,'a fuel deflecting member above the path of the projected fuel stream arranged for movement towards and away from such path, said fuel deflecting member being normally in a fixed position in the firing opening above the horizontal plane of the fuel projecting means, a firedoor for the upper portion of said firing opening, fluid pressure actuating means for moving said defleeting member and fluidpressure actuating lneans for opening said firedoor, and valvular means for simultaneously admitting fluid to and simultaneously interrupting admission of fluid to said actuating means.

4. In combination with a firebox having a firing opening, a fuel casing communicating with the lower portion of said firing opening, a distributor plate mounted in said firing opening for receiving fuel from said fuel casing, means at the rear of said plate arranged to project fuel thereover, and a hollow fuel deflecting member positioned above said distributor plate and mounted to swing upwardly about its rearward end, said deflecting member having a plurality of spaced openings at its forward end, said rearward end having an atmospheric opening whereby a current of air may be admitted to said deflecting member through said open rearward end and exhausted through said spaced openings.

5. In combination with a firebox having a firing opening, a fuel casing communicating with the lower portion of said opening, means for projecting fuelforwardly into said firebox in aerial paths, and a hollow fuel deflecting member pivotally mounted at its rearward end adjacent the outer upper marginal edge of said firing opening above the horizontal plane of the fuel projecting means and extending downwardly and forwardly through said opening above the path of the projected fuel, said deflecting member having a plurality of spaced openings at its forward end, said rearward end having an atmospheric opening whereby a current of air may be admitted to said deflecting member through said open rearward end and exhausted through said spaced openings.

6. In combination with a firebox having a firing opening, a fuel casing communicating with the lower portion of said opening, means for projecting fuel forwardly into said firebox in aerial paths, a firedoor frame embracing the upper portion of said firing opening, a firedoor mounted upon said frame, horizontal bearings formed with said frame, a hollow shaft pivotally mounted in said bearings and having its ends opening to atmosphere, and a hollow fuel deflecting member above the path of the fuel on said hollow shaft, said deflecting member being provided with a plurality of spaced openings and said hollow shaft being provided with a plurality of spaced openings communicating with the interior of said hollow deflecting member whereby a current of air may be admitted to said deflecting member through said hollow shaft and exhausted through said spaced openings.

'7. In combination with a firebox having a firing opening, a fuel casing communicating with the lower portion of said opening, means for pro jecting fuel forwardly into said firebox in aerial paths, a hollow fuel deflecting member above the horizontal plane of the fuel projecting means and above the path of the fuel arranged for upward swinging movement about a pivot at its rearward end, said deflecting member having a plurality of spaced openings and an open rearward end whereby a current of air may be admitted to said deflecting member through said open rearward end and exhausted through said spaced openings, a firedoor for the upper portion of said firing opening, a fluid actuated piston, connections from said piston to said door for opening the same, a second fluid actuated piston, connections from said piston to said deflecting member for raising the same, and valvular means for simultaneously admitting fluid to said fluid actuated pistons.

8. In combination with a firebox having a firing opening, a fuel casing communicating with the lower portion of said firing opening, means for projecting fuel forwardly into said firebox in aerial paths, a firedoor frame embracing the upper portion of said firing opening, a firedoor for the upper portion of said firing opening mounted upon said frame, horizontal bearings formed with said frame, a hollow shaft mounted in said bearings, a hollow fuel deflecting member above the horizontal plane of the fuel projecting means and above the path of the projected fuelon said hollow shaft and arranged for movement about the axis of said shaft, said deflecting member being provided with a plurality of spaced openings and said hollow shaft being provided with a plurality of spaced openings communicating with said hollow deflecting member whereby a continuous current of air may pass through said hollow shaft and said deflecting member from without the firebox into the firebox, and means for simultaneously opening said door and raising said deflecting member, said means permitting the simultaneous closure of said firedoor and the return of said deflecting member to its lowered position upon its release from said opening and raising actions.

9. In combination with a firebox having a firing opening, a fuel casing communicating with the lower portion of said firing opening, means for projecting fuel forwardly into said firebox in aerial paths, a firedoor frame embracing the upper portion of said firing opening, a firedoor for the upper portion of said firing opening mounted upon' said frame, horizontal bearings formed with said frame, a hollow shaft mounted in said bearings, a hollow fuel deflecting member above the horizontal plane of the fuel projecting means and above the path of the fuel, on said hollow shaft and arranged for movement in a vertical plane about the axis of said shaft, said deflecting member being provided with a plurality of spaced openings and said hollow shaft being provided with a plurality of spaced openings communicating with the interior of said hollow deflecting member whereby a current of air may pass through said hollow shaft and said deflecting member into the firebox, a fluid actuated piston, connections from said piston to said door for opening the same, a second fluid actuated piston, connections from said last named piston to said deflecting member for raising the same, and valvular means for admitting fluid to said fluid actuated pistons.

MORTON F. ROBERTSON.