US1969338A - Stoker - Google Patents

Description

Aug. 7, 1934. E, A, TURNE R 1,969,338

S TOKER Filed Oct. 2, 1933 Patented Aug. 7, 1934 1 1L969,338;3-- S EE Edwin Archer 'I umer,"NewYb1-li,1 fi to The'Standi'u'u Stoker Gbm p'a rated, a corporaticn of Delaware assignor'" y, nie rpa Application October 193's; sunfish-69117411. a claims; o1.1 10 10193 My present invention relates to mechanical stokers and appertains particularlyto fuel-.de fleeting and distributing means therefor.

5 fiection and distribution-of fuel over the firebox by the provision of: improved fuel defiectors'associated with distributing means.

2 More specific: objects of the invention reside" in the" particular arrangement and relation of the" fuel deflectors with the distributing means as illustrated on the accompanying drawing, in

which j Figure 1 is a detail vertical section through the upright wall of a boiler firebox showing the device of the invention applied thereto in similar section;

Figure 2 is a longitudinal section taken on the lines 22 of Figure 1; and

Figure 3 is a fragmentary approximately ver- *tical sectional view on line 33 of Figure 1.

On the drawing there is shown at 10 a portion of an upstanding wall of a boiler firebox having a firing opening 11 therein to which fuel is advanced by the screw 12 rotatably mounted in the inclined stoker conduit 13 which opens endwise into the firing opening. The mouth portion 14 of the conduit extends across the lower portion of the opening. Any preferred construction may be employed to attach the conduit to the wall 10 Oto maintain its mouth portion in communication with the firing opening.

In cross section the mouth portion 14 of the conduit is substantially rectangular in shape and the lower portion is substantially circular in cross 'sectional form as best shown in Figures 1 and 3. The fiat bottom wall of the mouth portion 14 is made in the form of a removable chambered member 15 commonly known as a distributor head. It may be held in position by any desired 'construction. A plurality of jet openings 16 in the upright face 17 of the distributor head communicate with the chambers 18 which may be supplied with pressure fluid from any suitable source of supply. The jet openings are spaced across the face 17 in a manner to discharge a fanshaped blast of pressure fluid across the distributor plate 19 and over the firebed of the firebox. In normal operation of the stoker the pressure fluid blast from the jet openings spreads the fuel evenly over the firebed. There are times, however, when for reasons well known to those skilled in the art it is desirable if not necessary todistribute the fuel in varying quantities to different sections of the firebed; This may be accom- 5'5 plished to some extent'by varying the intensity Its purpose is: to affordmore flexibility in th'ede' of the p'ressure fiuid blast but is more-effectively done byL-the provision of fuel defiectors acting on the. fuel: before' it reaches the distributing? blast.

Various types of fuel deflectors are in use but those of this invention afiord= more: flexible" control of: distribution; of thefuel and especially of thedistribution of fuel to the" back cornersand adjacent sides of the firebox-4 By: referenceito' the drawing: it; will be: seen that I" providea plu 6:5; rality of pivotallymonnted deflector Vanesat? each side of the mouth portion 1 4' of the'conduitl They are arranged in pairs as at 20, 21 and 22, 2 3 oppositely disposed and positioned with their axes entirely rearward of the straight central portion of the face 17 of the distributor head 15. The vanes 20, 21 are loosely mounted on the upstanding or substantially vertically disposed pivot pin 24 journall-ed as at 25, 2.511 in the conduit mouth portion and positioned so that the vanes form a continuation or movable part of the adjacent conduit sidewall. Vanes 22, 23 are similarly mounted and positioned at the opposite side of the conduit mouth portion on the pivot pin 240,.

Each of these vanes is movable independently of the other by means of individual adjusting screws 27 operable on lugs as at 28, one of which is formed on each vane. To prevent fuel from falling or being urged between the upper and lower vanes which would permit fuel to fall externally of the stoker conduit, overlapping shelves 29, 30 which extend laterally from the same side of each vane, are provided at their adj acent edges. Thus, it will be observed that the vanes form an expansible and contracti-ble mouth portion of the conduit divided into upper and lower expansible and contractible portions. When the deflector vanes are in a position as shown in Figure 3, the shelf or lateral projection 30 of the lower vanes forms a support or guide for the fuel passing toward the distributor head. I

With the deflector vanes of this invention, fuel can be deflected away from the rear corners of the firebox by moving the lower vanes inwardly of the conduit substantially as best illustrated in Figures 2 and 3 of the drawing, and at the same time fuel can be deflected toward the central side portions of the firebox by positioning the upper deflector vanes outwardly of the conduit with. respect to the inner vanes as illustrated in the aforesaid figures. This deflection of the fuel'cannot be accomplished with deflector vanes used heretofore. When the vanes are positioned as illustrated it will be seen that the inwardly positioned lower vanes deflect the lower strata of 0 the fuel stream away from the jet openings directed toward the rear corners of the firebox so that the entire lower strata of the fuel stream will be fed to the central portion of the distributor plate. At the same time the outer portions of the upper strata of the fuel stream may pass over the lower vanes into the zone of action of the pressure .fluid jets directed to the central side portions of the firebox.

Similarly, by positioning the lower vanes outwardly of the conduit with respect tothe position of the upper vanes, outer portions of-the lower strata of the fuel stream may be deflected into the zone of action of the pressure fluid jets directed to the rearward corners of the firebox, while at the sametime, the upper strata of fuel is being 7 directed to the forward central portion of the firebox thereby tending to deflect the fuel to the rear corners and forward central portions of the firebox but not to the side central portions thereof.

' From the foregoing it will be recognized that I haveprovided a useful, advantageous and highly flexible means for deflecting and projecting fuel over the fire. W

I .claim:

1. In combination, a'firebox having a wall with an opening therein, a stoker feed conduit having its discharge end communicating with said firebox .throughsaid opening, means for advancing fuel through said conduit, a fuel distributor adjacent the discharge end of the conduit having a face provided with a plurality of jet openings and including a distributor plate extending forward from said face below said jet openings, two pairs of deflector vanes pivotally mounted on upstanding axes disposed rearward of said face, one pair of such deflector vanes being at each side of the conduit, means for independently adjusting each deflector vane, said deflector vanes forming an expansible and contractible mouth for said conduit divided into upper and lower independently adjustable expansible and contractible portions, and overlapping shelves projecting laterally from the adjacent edges of the vanes of each pair.

2. In combination, a firebox having a wall with an opening therein, a stokerfeed conduit having its discharge end communicating with said firebox through said opening, means for advancing fuel through saidconduit, a fuel distributor adjacent the discharge end of the conduit having a face provided with a plurality of jet openings and including a distributor plate extending forward from said face below said jet openings, two pairs of deflector vanes pivotally mounted on upstanding axes disposed rearward of said face, one pair of such deflector vanes being at each side of the conduit, means for independently adjusting each deflector vane, and projections extending laterally from the same sides of the deflector vanes of each pair,- the lateral projection of a vane at each side of the conduit arranged to form a guide for fuelpassing toward said distributor head.

E. ARCHER TURNER.

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