US2088602A

US2088602A - Fuel deflecting mechanism

Info

Publication number: US2088602A
Application number: US659919A
Authority: US
Inventors: Paul A Ketchpel
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

Aug. 3,1937. P. A. KETCHPEL FUEL DEFLECTI ENG MECHANISM F il ed March '7, 193s 4 she ets-g he t 1 m K A L M P ATTORNEY.

Aug. 3, 1937.

. FUEL DEFLECTING MECHANISM Filed March .7, 1935 4 Sheets-Sheet 4 INVIIINTOIR. .Paa l AKetch oez L BY v ATTORNEY.

P. A. KETCHPEL- 2,088,602

Patented Aug. 3, 1937 UNITED STATES PATENT OFFICE 2,088,602 FUEL DEFLECTING MECHANISM Stoker Company, Inc., New poration of Delaware Application March 7,

12 Claims.

This invention relates generally to a firebox construction, and particularly to the firebox of a locomotive, the firing opening of which is provided with a fuel deflecting member above the 5 path of the introduced fuel and a fire door.

It is an object of the invention to provide, in a structure of the type described, a deflecting member arranged to be actuated by the fire door, so that when the fire door is opened, the deflect- 10 ing member will be moved from its normal position to a position where it will not obstruct the firing opening.

A more specific object of the invention resides in the provision of a simple, convenient, efficient 15 and practical means for actuating the deflecting member directly from the fire door, including a cam arrangement.

It is a further object of the invention to provide in a structure of the type described, an arrangement whereby the deflecting member is moved from its normal position to a position where it will not obstruct the firing opening, the movement of said deflecting member being responsive to the opening ofthe door and occurring only when the door has been opened a predetermined distance.

Further objects of the invention reside in the details of construction of the firedoor and fuel deflecting member and other parts, and the novel 30 arrangement and combination of the parts as will appear from the following description when read in conjunction with the drawings, in which Fig. 1 is a. central vertical longitudinal section through a portion of the rearward end of a loco- 35 motive showing the invention, partly in section and partly in elevation, applied to the firebox of the locomotive;

Fig. 2 is a view in elevation of the fire door as seen from the inside thereof and showing a cam 4 groove arrangement applied thereto;

Fig. 3 is a view taken on the lines 33-3-3 of Fig. 1;

Fig. 4 is a view in elevation of the fire door frame and the deflecting member, parts being broken away and shown in section, illustrating the means for supporting the deflecting member from the frame;

Fig. 5 is a sectional Fig. 4;

Fig. 6 is a sectional view on the line 6-6 of Fig. 4;

Fig. 7 is a view of the locomotive and firebox similar to that shown in Fig. 1, with a modified form of the invention applied thereto;

Fig. 8 isan elevational view of the interior of view on the line 5-5 of York, N. Y., a 001'- 1933, Serial No. 659,919

the fire door showing the cam groove of the modified form of the invention applied thereto;

Fig. 9 is a View taken on the line 9-99 of Fig. 7; and

Fig. 10 is a view in perspective of the connecting rod between the fire door and deflecting memher.

For convenience of description, the term forward is employed to. denote the direction in which the fuel passes through the stoking mechanism. The terms rearward and lateral are used for the purpose of defining directions with reference to this forward passage of fuel.

In the drawings, referring more particularly to the preferred form of the invention illustrated in Figures 1 to 6 inclusive, the backwall or rear water leg of a locomotive boiler is shown at l0, and has a firebox opening H therethrough. A deck l2 extends rearwardly from the backwall l0 below the lower marginal edge of the firebox opening H. Suitable means is provided for discharging fuel to or into the lower portion of the firebox opening, as by a stoker indicated generally by the numeral l3. The stoker I3 includes a fuel casing l4 communicating with the lower portion of the firebox opening I l.

The upper portion of the firebox opening, above the casing i4, is provided with an arched door frame IS on which is mounted a firedoor [6 comprising the door members I! which meet upon the vertical center line of the firebox opening and are pivoted upon pins 18 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 through the firebox opening when cleaning or raking the fire.

Suitable means is provided for scattering fuel over the fire, including a distributor plate l9 across which the 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 firebed in a'firebox, particularly over the firebed of a locomotive firebox, the

draft causes a comparatively large amount offuel particles to be carried over the firebox arch and to escape 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 fuel down closer to the firebed where they will be consumed, have been proposed.

The use of such top deflectors in conjunction with a distributor plate has in a large measure overcome these difficulties. However, in some of such constructions the top deflector has interfered with hand firing of fuel or with the use of a hook or poker in raking or cleaning the fire. By my invention the deflecting member 2| is'automatically moved, simultaneously with the opening of the firedoor 6 to a position permitting free access to the firebox for purposes of hand firing or the insertion of a hook or poker to rake or clean the fire. The deflecting member 2| is arranged to be actuated directly by the firedoor |6 so that it will function whether the door is operated by power means or whether it is operated manually.

The fire door l6 may be operated by a fluid pressure apparatus comprising a cylinder 22, containing a piston for actuating the door members l1, and suitable valve mechanism (not shown) may be provided in the pressure fluid line 23 and cylinder 22. For operating the door It by hand, a hand lever 24 is provided.

The deflecting member 2| comprises the hollow flat plate-like forward portion 25 slightly less in width than the width of the firing opening, and a hollow rearward portion 26 of lesser width than the forward portion 25 formed with the transversely extending tubular shaft 21. A pair of spaced

brackets

28 and 29 depend from and are secured'in a suitable manner, as bybolts 30, from the sides of the top of the arch of the door frame I5. The

brackets

28 and 29 have formed therewith aligned, transversely inwardly extending hollow members 3| and 32 respectively, forming bearings upon which the tubular shaft 21 of the deflecting member 2| is rotatably mounted, permitting pivotal movement of the deflecting member 2| about the bearings 3| and 32.

Normally, when the door members 1 are closed, the deflecting member 2| is in the position indicated in Figure 1, in which position the flat platelike portion 25 tends to hold down the fuel projected across the'plate 9 closer to the firebed where it will be burned instead of being can'ied over the firebox arch unconsumed. When the door members 1 are opened, the deflecting member is arranged to be elevated by an upward swinging movement about its rearward end as a pivot to a position adjacent the upper marginal edge of the firing opening where it will not obstruct the firing opening.

The novel arrangement for operating the deflecting member 2| will now be described in detail. The tubular shaft 21, opposite the deflecting member 2|, is provided at one end with the rearwardly extending lug 33. A roller 34 is mounted on ,the free end of the lug 33 on roller bearings 35 and is held in position thereon by a cap 36 threaded in the free end of the lug33. cap 36 constitutes a spacer cage for the roller bearings 35 and cooperates therewith in the customary manner to prevent lateral movement of the roller 34. A plate 31 is secured to the inner side of one of the door members |1 adjacent its upp r, end, by suitable means, as by rivets 38 passing through the depending and

upstanding flanges

39 and 40, respectively, of the plate 31. When the door members H are closed, the plate 31 extends laterally inwardly beyond the door 31 is provided with a curved groove 4| for a shortdistance therefor, so that, when the door members l1 are opened, the lug 33 will be forced downwardly by reason of the engagement of its roller 34 in the cam groove 4|, and the deflecting member 2| will be raised about its pivoted rearward end to a position adjacent the upper marginal edge of the firebox opening. Whenthe door members H are closed the deflecting member again assumes its operative position above the distributing plate I9.

The hollow plate-like portion 25 of the deflecting member 2| is preferably provided with a plurality of openings 42, so that a continuous current of air will be drawn from without the firebox through the hollow members 3| and 32, the transversely extending tubular shaft 21 and the hollow deflecting member 2|, into the firebox, thereby materially increasing the life of the deflecting. member.

In Figures 7 to 10, inclusive, is shown an alternative construction; in which the deflecting member is pivotally mounted adjacent'the upper forward end of the stoker casing |4 instead of adjacent the upper marginal edge of the firebox opening, as in the preferred form of the invention.

1 In the modified construction, a substantially rectangular shaped hollow plate-like deflecting member 50, is rotatably mounted at its hub portion 5| on the bearings52 and 53 which extend laterally inwardly from the opposite sidewalls of |1 through engagement of the lug 33 and its.

roller 34 in the cam groove 4| of the plate 31. The shaft 21, however,instead of carrying a deflecting member, carries a forked'projection 54 having a pin 55 extending transversely therethrough. The hub portion 5| of the member 50 carries a similar forked projection 56 diametrically'opposite the deflecting memberv 50, having a pin 51 extending transversely therethrough. A link 58,. provided in its .opposite ends with the

grooves

59 and 60 which engage the

pins

55 and 51 respectively, transfers rotary movement from the shaft 21 to the hub portion 5| of the deflecting member 50 thereby raising or lowering the latter, according to whether the door members are being opened or closed.

For ease in operation of the deflecting member 50 and the door members H, the overhanging weight of the deflecting member 50 is such that only a smallamount of force will benecessary to open the door members |1..

In order to permit opening the door members H a slight distance for purpose of inspecting the fire, without'causing the deflecting member 50 to move and without necessitating shutting off of the 'blast issuing from the distributor head 20, the lower end of the cam groove 4| may be so curved that the roller 34 will move therein without causing the lug 33 to be depressed.

The deflecting member 50 is provided with a plurality of openings 6| and the hub portion 5| is providedwith a plurality of openings '62, permitting'a' current of air to be drawn from without the firebox, into the firebox through the holow deflecting member deflecting.

50, thereby increasing the life thereof andalso providing a source of air such in furnaces arranged for stoker or manual I claim: I

I 1. In combination with a firebox having a wall with afiring opening therein, a fuel casing communicating with the lower portion of said opening', a firedoor for the upper portion of said opening movable in a p-lanesubstantially parallel to the plane of said firebox wall, a fuel deflecting member pivotally mounted on a' horizontalaxis extending transversely of said firing opening and parallel to said firebox wall, said fuel deflecting member extending into said firebox, means for opening said firedoor, a cam on the inner side f said firedoor andarranged to move therewith, "and means operable by said cam for moving said pivotally mounted deflecting member upon its pivot. I

= 2.-In combination with a firebox having a wall with a firing opening therein, a fuel casing communicating with the lower portion of said opening, a firedoor for the upper portion of said opening movable in a plane substantially parallel to the plane of said firebox wall," a fuel'deflecting' member pivotally mounted adjacent the outer upper'marginal' edge 'of the firing opening and' extending through said opening into said firebox, said fuel deflecting member being mounted on a horizontal axis extending transversely 'of said firing opening and parallel to said firebox =wall, means for opening said firedoor, a cam on the inner'side of said firedoor and arranged to move therewith, and means operable by said cam for moving said pivotally mounted deflecting member upon its pivot.

3. In combination with a firebox having a wall with a firing opening therein, a fuel casing communicating with the lower portion of said opening, a firedoor for the upper portion of said opening movable in a plane substantially parallel to the plane of said firebox wall, a fuel deflecting member pivotally mounted adjacent the upper forward edge of said casing and extending through said opening into said firebox, said fuel deflecting member being mounted on a horizontal axis extending transversely of said firing opening and parallel to said firebox wall, means for opening said firedoor, a cam on the inner side of said firedoor and arranged to move therewith, and means operable by said cam for moving said pivotally mounted deflecting member upon its pivot.

4. In combination with a firebox having a wall with a firing opening therein, a fuel casing communicating with the lower portion of said opening, a firedoor for the upper portion of said opening movable in a plane substantially parallel to the plane of said firebox wall, a fuel deflecting member pivotally mounted on a horizontal axis extending transversely of said firing opening and parallel to the plane of said firebox wall, said fuel deflecting member extending into said firebox, means for opening said firedoor, a cam race on the inner side of said firedoor and arranged to move therewith, and means received in said cam race and operable thereby for moving said pivotally mounted deflecting member upon its pivot.

5. In combination with a firebox having a opening,

firingopening, a fuel casing communicating with the lower portion of said opening, a firedoor for the upper portion of said opening, a deflecting member pivotally mounted at its rearward end and'extending into said firebox, a curved cam 5 "race on'the inner 'side of said firedoor and arrange d-to move therewith, means for opening said firedoor, means arrangedto be received at one end in said curved cam race'and operatively connected at its other end with said deflecting member, said last named means being operable by said cam race for moving said deflecting member about its pivotally mounted end when said firedoor is moved.

6. In combination with a firebox having a communicating with the lower portion of said a firedoor for the upper portion of said opening hinged upon approximately a horizontal wall provided with a firing opening, a fuel casing axis extending longitudinally of said firebox, a

- deflecting member pivotally mounted at its rearward end and extending into said firebox, said firedoor being'provided on its inner side with a curved cam groove, connecting means operatively connected at oneend to said deflecting member and operatively engaging at its other end in said curved cam groove, a portion of said cam groove being described on an arc concentric with the axis of said firedoor whereby during a portion of the 0 movement of the door, the cam groove will be' ineffective tomove the deflecting member, and a portion of said cam groove being described on an arc eccentricwith the axis of said firedoor whereby during another portionof the movement of the door the curved cam groovewillfi move said deflecting member through the said connecting means.

7. In combination with a firebox having a firing opening, a fuel casing communicating with a portion of said openingga firedoor forthe 're- 4 maining portion of said opening, means for opening said firedoor, a deflecting member pivotally mounted at its rearward end and extending into said firebox, means operatively connecting said firedoor and said deflecting member, said last named means being responsive to movement of said firedoor for moving said deflecting member from its normal position, said means being arranged to be ineffective for moving said deflecting member during a portion of the movement of said firedoor and being operable by said firedoor during the remaining portion of its movement for moving said pivotally mounted deflecting member upon its pivot.

8. In combination with a firebox having a firing opening, a fuel casing communicating with a portion of said opening, a firedoor for the remaining portion of said opening, means for opening said firedoor, a deflecting member pivotally mounted at its rearward end adjacent the upper forward edge of said casing and extending into said firebox, means operatively connecting said firedoor and said deflecting member, said last named means being responsive to movement of said firedoor for moving said deflecting member from its normal position, said means being arranged to be inefiective for moving said deflecting member during .a portion of the movement of said firedoor and being operable by said firedoor during the remaining for moving said pivotally mounted deflecting member upon its pivot.

9. In combination with a firebox having a wall with a firing opening therein, a fuel casing comportion of its movement municating with said firing opening, a firedoor forming with said casing a closure for said firing :opening, a fuel deflecting member pivotally mounted on a horizontal axis extending transversely of said firingopening and parallel to said firebox wall, said fuel deflecting member extending into said firebox, means for opening said firedoor, a cam movable with said door and means operable by said cam for moving said pivotally mounted deflecting member upon its pivot.

10. In combination with a firebox having a wall with a firing opening therein, a fuel casing communicating with the lower portion of said opening, a firedoor for the upper portion of said opening movable in a plane substantially parallel to the plane of said firebox wall, a fuel distributing plate mounted in said firing opening for receiving fuel from said casing, means for projecting fuel across said plate into said firebox, a

fuel deflecting member pivotally mounted on a horizontal axis extending transversely of said firing opening and parallel to said firebox wall,

said deflecting member normally extending for- Wardly from its pivotally mounted end into the firebox in a plane a distance above said distributor plate to deflect a portion of the projected fuel-downward, means for opening said firedoor and means connecting and transmitting motion from said firedoor to said deflecting member including mechanism for translating the transverse motion of the firedoor to vertically swinging movement of the deflector about its axis.

11. In combination with a firebox having a wall with a firing opening therein, a fuel casing communicating with the lower portion of said opening, a firedoor for the upper portion of said opening movable in a plane substantially parallel to the plane of said firebox wall, a fuel distributing plate mounted in said firing opening for receiving fuel from said casing, means for projecting fuel across said plate into said firebox, afuel deflecting memberpivotally mounted adjacent'the outer upper marginal edge of the firing opening on a horizontal axis extending transversely of said firing opening and parallel to said firebox wall, said fuel deflecting member 7 normally extending forwardly from itspivotally mounted end into the firebox above the horizom tal plane of the fuel projecting means andforming a roof over the distributing plate substantially the full width of the fuel stream, means for open ing said firedoor and means responsive to the opening of said firedoor arranged to raise said deflecting member about its pivotal mounting to a position adjacent the upper 'marginal edge of the firing opening.

12. In combination with a firebox having a wall with a firing opening therein, a fuel casing communicating with the lower portion 01' said opening, a firedoor for the upper portion of said opening movable in a plane substantially parallel to the plane of said firebox wall, a fuel distributing plate mounted in said firing opening for receiving fuel from said casing, means for projecting fuel across said plate into said firebox, a fuel deflecting member'pivotally mount:

ed adjacent the upper forward edge of said casing on a horizontal'axis extending transversely of said firing opening and parallel to said firebox wall, said fuel deflecting member normally extending forwardly from its pivotally mounted end into the firebox above the horizontal plane of the fuel projecting means and forming a roof over the distributing platesubstantially the full width of the fuel stream, means for opening said firedoor and means responsive to the opening of said firedoor arranged to lower said deflecting member about its pivotal mounting towards the lower marginal edge of the firing opening.

PAUL, A. KETCHPEL.