US2116578A - Stoker - Google Patents

Description

May 10, 1938. P, A. KETcHPl-:L

STOKER Filed Nov. 19, 19.54

2 Sheets-Sheet 1 gil-ll! MLIIH IIII IIN-l.

' INVENTOR R41/L A. KE TCHPEL @i M @Lw ATTORNEY May 10, 1938.- P, A, KETCHPEL 2,116,578

STOKER Filed Nov. 19, 19321 2 sheets-sheet 2 INVENTORl l BMLAKETGHPEL Mg 7 A V y,

ATTORNEY Patented May 10, 1938 PATENT OFFECE STOKER Paul A. Ketchpel, West Englewood, N. J., assigner, by mesne assignments, to The Standard Stoker Company, Inc., a corporation of Delaware Application November 19, 1934, Serial No. 753,565

9 Claims.

' This invention relates generally to stokers for locomctivesor other steam generating devices and more specifically to stokers of the type disclosed in United States Letters Patent No. 1,947,723, granted February 20, 1934, to Nathan M. Lower.

It is accordingly an object of the invention to provide in a stoker of the aforementioned type in which the chambered floor portion, commonly known as the jet plate, of the discharge conduit is formed separate from the conduit, a novel arrangement and construction of the jet plate and associated parts for securing the jet plate in position, whereby it may be easily and conveniently removed and replaced.

Another object of the invention is to provide an' `improved and novel construction of. the jet plate and the distributor plate whereby the latter is `detachably secured to the jet plate and is readily and easily removable therefrom..

More specically, the invention contemplates the provision of a novel distributor plate in which extensions of the fuel deflecting ribs constitute one element of a fastening means for securing the distributor plate to the jet plate. I

With these and other objects in view which will be apparent as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment of the invention is illustrated in the accompanying drawings, in which,

' Figure l is a detail vertical section through the upright wall of a boiler rebox showing the device o'f. the invention applied thereto and shown in similar section;

Figure 2 is a fragmentary front elevation of the structure shown in Figure l;

` Figure 3 is a fragmentary plan sectional view taken on the line 3--3 of Figure l;

Figure 4 is a plan view of the chambered jet plate with pipes for supplying fluid thereto shown applied to the plate;

Figure 5 is a side elevation of the jet plate embodied in the device of the invention;

Figure 6 is an isometric view of the distributor table embodied in the device of the invention;

and I Figure l is a side elevation of the distributor table shown in Figure 6. I

Referring to the drawings, the numeral IIJ indicates a portion of an upstanding wall of. a boiler Firebox having an opening II therein, to

which opening fuel is advanced by a screw cnveyor I2 housed within the inclined Stoker conduit I3. The conduit I3 opens endwise into the .firing opening II and its mouth portion I4 extends across the lower portion of the opening I I. The mouth portion I4, as best shown in Figure 3, flares laterally, the sides thereof being dened by the diverging walls I5 and I6, and the walls Il and i8 extending longitudinally forward from the free ends of the walls I5 and I6, respectively, to the upstanding boiler wall ID. A pair of brackets I9 and 29 are arranged with faces fitting closely against the walls I1 and IB, respectively, and other faces tting against the boiler wall I0. Suitable means, such as bolts 2I, are provided for securing the brackets I9 and 20 to the boiler wall I0, and bolts 22 passing through the walls i l and I3 and the brackets I9 and 20, respectively, for securing the conduit I3 to the boiler wall I0. A jet plate 23 is mounted at the forward end of, the conduit I3, to form a continuation of its bottom wall 24 extending in the ring opening II. The jet plate 23 is formed with the transversely extending upstanding front face 25 having jet openings as at 26 for the discharge of luid under pressure over and above the forwardly extending distributing table 21. This table is supported from the jet plate 23 in a novel manner and its construction and relation with the jet plate will be described hereinafter in greater detail.

Rearward of the face 25 the jet plate includes broad at floor portion 28extending the full width of the conduit mouth portion I4 to form, in effect, an extension or continuation of the floor 24 thereof. At opposite ends of the floor 28 the jet plate is provided with upstanding, longitudinally extending, oppositely spaced flanges 29 and 39 secured to the side walls II and I8, respectively, of the conduit mouth portion I4. Fastening members, such as the bolts 3l, extend through the brackets I9 and 20, thewalls Il' and i9, and the anges 29 and 3G, respectively, rigidly securing the jet plate 23 to the conduit mouth portion M and brackets I9 and 20. The bolts 3l constitute means in addition t0 the bolts 22' for securing the conduit I3 rigidly with respect to the boiler wall IS and at the same time constitute means for rigidly securing the jet plate 23` in position. I

The jet openings 26 communicate with a plurality of chambers formed in the jet plate 23. `It will be seen from Figure 4 that the sidewardly directed jets 23a and 26h communicate with the chambers 32 and 33, respectively, and the forwar'dly directed jets 26e and 26d communicate with the chambers 34 and 35, respectively. The jets 26e communicate with the chamber 36, as is best illustrated in Figure l. Fluid under pressure is supplied to the chambers 32, 33, 34, 35 and 36 from a suitable source of supply by'the pipes 32a, 33a, 34a, 35a and 36a., respectively.

The distributing table 2l is provided with a flat top surface 31 across which fuel is projected by the fluid issuing from the jets 25. This surface 31 is interrupted by a plurality of longitudinally extending upstanding ribs for deilect ing fuel to various parts of the rebox. A pair of ribs 38, 39 extend forwardly from the rearward edge of the table 2'! between the longitudinal center line and the respective ends thereof. These ribs 38 and 39 diverge as they extend forwardly and curve laterally away from each other to the forward corners of the table 2`I. Between the ribs 38 and 39 are any desired number of straight ribs 4G, preferably as shown in Figure 6, one on the `longitudinal center line of the table and one on each side diverging from the center rib as they extend forward.

The ribs 38 and 39 extend beyond the rearward edge of the table 2l', the extensions @II and 42 being provided at Vtheir rearmost ends with transversely extending upstanding flanges 43 and 44, respectively.

The jet plate 23 is provided in its front face 25 with a pair of vertical slots, substantially T-shaped in horizontal cross section, one slot 4l' being between the jets 26a and the jets 2Go and the other slot 48 being between the jets 26h and the jets 26d. When the jet plate 23 and the distributor table 2l are assembled, the extensions of the ribs 38 and 39 and their respective flanges 43 and 46, llt in the T- shaped slots 41 and 48, respectively, whereby relative longitudinal and lateral movement between the plate and table is prevented. Upward movement of the table is of course normally prevented by the weight of the table, while downward movement isprevented by the stops 49 and 50 formed with the flanges I3 and 44, respectively. Disengagement of the table from the plate, when it is necessary to make repairs or replacement thereof, is accomplished by lifting the table vertically until the flanges 43 and 44 are disengaged from the slots 41 and 48, respectively.

Since, as explained above, the slots 47 and 48 are disposed between the side and center jets and consequently so are the extensions of the ribs 38 and 39 and their flanges 33 and d, respectively, it is clear that there will be no inter- `.ference with the operation of the jets by my novel means for securing the distributing table to the jet plate.

In a stoker of this character in which the screw I2 extends closely adjacent to the front face 25 of the jet plate there is a tendency for the fuel to be discharged more to one side of the discharge mouth I4 than the other. This is overcome and even deflection of the fuel to the distributing table is pro-vided by the oppositely disposed upstanding fuel defiectors 5I, 52 which are pivoted respectively at 5Ia, 52a, in the conduit I3 adjacent respective side walls thereof and rearward of the jet plate 23. The axes of the pivots 5Ia, 52a are disposed substantially perpendicular to the flow of fuel through the discharge conduit so that by swinging the deflectors 5I, 52 about their axes, as by means of the hand screws 5Ib, 52D, respectively, the fuel may be deflected laterally to one side of the jet plate or the other as desired. In effect, the fuel deilectors constitute an expansible and contractible extended mouth portion of the discharge conduit. It will be observed that the deilectors extend beyond the side walls of the conduit forwardly to a point adjacent the front face 25 of the jet plate 23 and that they are spaced between the flanges 29 and 3D of the jet plate to guide the fuel forwardly over the jet plate floor 28 into the zone of action of the pressure fluid blasts sweeping across the distributing table 21.

I have thus provided a simple and compact arrangement whereby the distributing table may be removed without disturbing any other parts of the stoker, and the distributing table and jet plate may be conveniently removed by the simple expedient of removing the bolts 22, the stoker conduit at the same time remaining rigidly secured to the boiler wall by means of the bolts 3l.

I claim:

1. In combination, a ilrebox having an upstanding wall with a firing opening therein, a pair of flanges extending rearwardly from said upstanding wall, one at each side of said firing opening, means for securing said flanges to said wall, a Stoker conduit communicating with said firing opening, said conduit at its forward end being provided with a delivery mouth having side walls spaced apart approximately the width of said firing opening and fitting closely against said flanges, a jet plate disposed at the delivery mouth of said conduit, said jet plate having upstanding flanges at the ends thereof disposed adjacent the side walls of said delivery mouth, and fastening means extending through said rearwardly ex-` tending flanges, said side walls and said jet plate flanges for rigidly securing said conduit and said jet plate with said upstanding wall.

2. In combination, a flrebox having an upstanding wall with a firing opening therein, a pair of flanges extending rearwardly from said upstanding wall, one at each side of said firing opening, means for securing said ilanges to said wall, a stoker conduit communicating with said firing opening, said conduit at its forward end being provided with a delivery mouth having side Walls spaced apart approximately the width of said firing opening and fitting closely against said ilanges and a bottom wall joining the lower edges of said side walls, a jet plate having a floor forming a continuation of the bottom wall of said conduit, said jet plate having upstanding flanges at the ends thereof disposed adjacent the side walls of said delivery mouth, fastening means extending through said rearwardly extending flanges and said conduit side walls for securing the conduit to said upstanding wall and fastening means extending through said rearwardly extending ilanges, the sidewalls of said delivery mouth and said jet plate flanges.

3. In combination, a ilrebox having an upstanding wall with a firing opening therein, a pair of flanges extending rearwardly from said upstanding wall, one at each side of said firing opening, means for securing said flanges to said wall, a Stoker conduit communicating with said firing opening, said conduit at its forward end having walls diverging to approximately the width of said firing opening, side walls extending forwardly from the ends of said diverging walls and fitting closely against said flanges and a bottom wall joining the lower edges of said diverging walls, a jet plate having a floor forming a continuation of the bottom wall of said conduit, said jet plate having longitudinal upstanding flanges at the ends of the iloor thereof disposed adjacent said forwardly extending side walls,

fastening means extending through said rearwardly extending flanges and said forwardly extending side walls for securing the conduit to said upstanding wall and fastening means extending through said rearwardly extending anges, said forwardly extending side walls and said jet plate flanges.

4. In a stoker, a distributing device arranged to permit fuel to pass thereover for distribution over a re, comprising separable rear and front sections, each of said sections having a fuel supporting surface, the fuel supporting surface of the forward section being disposed below the upper forward edge of the rear section, said rear section being provided in its forward edge portion with upwardly and forwardly opening slots, said slots in transverse cross section being of lesser width at their forwardly opening portion than at a point rearward of such portion, said front section having rearwardly projecting extensions rising above the upper surface of said front section, said extensions being intertted with said slots and arranged in slidable engagement with said slots in the direction of their extent, said extensions and slots extending above the fuel supporting surface of said forward section and being arranged when in engagement to prevent relative lateral and longitudinal movement between said sections, and means for limiting the downward movement of said front section with respect to said rearward section.

5. In a stoker, a distributing device arranged to permit fuel to pass thereover for distribution over a fire, comprising separable rear and front sections, each of said sections having a fuel supporting surface, the fuel supporting surface of the forward section being disposed below the upper forward edge of the rear section, said rear section being provided in its forward edge portion with upwardly and forwardly opening slots T- shaped in cross section, said front section having rearwardly projecting extensions above the fuel supporting surface thereof substantiallyT-shaped in cross section and arranged in slidable engagement with said T-shaped slots in the direction of their extent to prevent relative lateral and longitudinal movement between said sections, and means for limiting the downward movement of said front section with respect to said rearward section.

6. In a stoker, a distributing device arranged to permit fuel to pass thereover for distribution over a fire, comprising separable rear and front sections, each of said sections having a fuel supporting surface, the fuel supporting surface of the forward section being disposed below the upper forward edge of the rear section, said rear section being provided in its forward edge portion with upwardly and forwardly opening slots, said slots in transverse cross section being of lesser width at their forwardly opening portion than at a point rearward of such portion, said front section having deiiecting ribs extending above the fuel supporting surface thereof, said ribs projecting rearwardly beyond the rearward edge of said front sections, the projecting portion of said ribs forming members intertting with said slots and arranged in slidable engagement with said slots in the direction of their extent, said slots and projecting rib portions being arranged when in engagement to prevent relative lateral and longitudinal movement between said sections, and means for limiting the downward movement of said front section with respect to said rearward section.

'7. In a stoker, a distributing device arranged to permit fuel to pass thereover for distribution over a fire, comprising separable rear and front sections, said rear section including chambers disposed centrally between the ends and beneath the surface of said rear section and a chamber at each side of said centrally disposed chambers, said rear section having a front face provided with jet apertures communicating with said chambers and having an upwardly and forwardly opening slot between said centrally disposed chambers and each of said side chambers, said front section having upstanding deflecting ribs, said ribs projecting rearwardly beyond the rearward edge of said front section, the projecting portion of said ribs forming members arranged in slidable engagement with said slots, said slots and members being arranged when in engagement to prevent relative lateral and longitudinal movement between said sections, and means for limiting the downward movement of said front section with respect to said rearward section.

8. As a new article of manufacture, a jet member for a stoker comprising, when in an operative position, a fioor portion, and a wall depending from the forward end of said floor portion and forming a front face for said jet member, said floor portion and said depending wall having included therebetween a plurality of pressure fluid chambers, said wall beingprovided with apertures leading from said chambers, said depending wall being provided with upwardly and forwardly opening slots of greater width rearward of said depending wall than at their open forward portions and arranged to receive and maintain in operative relation a Stoker distributing table.

9. As a new article of manufacture, a distributor table for a stoker comprising when in an operative position an approximately horizontal wall, the upper side of which constitutes a fuel supporting surface, and a pair of upstanding fuel deecting ribs upon the upper side of said wall, said ribs projecting outwardly beyond the rear edge of said horizontal wall, the projecting portions of said ribs being approximately T-shaped in horizontal cross section, each of said ribs being of greater height at the aforesaid edge of said horizontal wall than at the opposite edge thereof.

PAUL A. KETCHPEL.

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