US1668324A - Fuel-supplying device - Google Patents

Description

May 1, 1928.

H. KREISINGER FUEL SUPPLYING DEVICE Fild Dec. 17, 1.926

2 Sheets-sheaf l ampemtoz @513 um/mega Wan May 1, 1928. 1,668,324

H. KREISINGER FUEL SUPPLYING DEVICE Filed D601 17, E26 2 Sheets-Sheet 2 @51 M ai WW Patented May 1, 1928.

' UNI-TED STATES PATENT "orr ca.

ma xnnrsmenn, or PIEDMONT, new YORK, assrenon ro m'rnmwrronn. COI- BUSTION ENGINEERING CORPORATION,

DELAWARE.

OF NEW YORK, N. Y., A. CORYOBATIOI OI IUEL-SUPPLYING DEVICE.

\ lppmatlonnled December 17, 1926. Serial No. 155,438w

This invention relates to a mechanism for supplying finely divided material, such, for example, as pu verized coal, and 1s particula'rly useful in connection with the delivery 6 of such materialfrom bins or other such receptacles in which it 'may be stored. The invention will be described as used in connection with pulverized coal.

The present invention is an'improvement 1o ofthe apparatus shown and described in United States Letters Patent No. 1,555,297, granted September 29, 1925. I

As pointed out in this patent, there have been certain difliculties encountered in maintaining a regular flow of coal, owing to the irregularity in feeding and .floodmg of the screw feeders which are used to convey the coal from the bins. This is due to the coal sticking on the walls of the feeder hoppers and on the walls of the bins which causes the coal in the bin to bridge over above the screw feeders forming what are called rat holes. When such holes are formed,-the

screw feeders ma stop feeding altogether,

5 and when the coa caves into the rat hole, it frequently causes flooding of the feeder.

There has also been some difiiculty, as pointed in the above patent, in connection with the shutt' ofi of the coal in the bm so when it is desii' dd to cut out a feeder.

It is the primary objectof the present invention to provide an improved agitator for the coal to prevent sticking and the consequent formation of rat holes.

as It is a further object of my invention to provide an improved agitator which may also be used as a shut-off. 4 It is a further object of my invention to provide an agitator which will operate effecso tively without packing thecoal at any point.

The foregoing, together with such other objects as may hereinafter appear, or are incident to my invention, I obtain by means of a construction which I have illustrated in preferred form in the accompanying drawings wherein- Fig. 1 is an end elevation of a portion of a coal bin with my improved shut-pfi and agitator applied thereto.

Fig. 2 is a section taken on the hue 2-2 of Fig. 1, with certain of the parts shown m elevation Fig. 3 is a section taken on the line 33 of Fig. 2, with both shutter blades in horizontal position.

Fig. 4 is a view similar to Fig. 1 showing certain modifications of the driving mechamsm.

Fig. 5 is a section on the line 55 of Fig. 4, and

Fig. 6 is a section on the line 6-6 of Fig. 5.

Referring, now, to Figs. 1 to 3, reference letter A indicates a pulverized coal bin havmg an outlet portion C and a trough portion B in which the screw feeder 7 operates.

The combined shut-off and agitator blades 8 are placed in the outlet 0 and are fixed to shafts 9 which are mounted to revolve in the sides of the bin. These blades 8, when used as agitators, lie at right angles to each other, as shown in Fig. l, and are slowly revolved in opposite directions. The means for actuating the blades 8 comprise amotor (not shown) of any suitable type which drives the pulley 10 by means of belt 11. The pulley 10 is secured to the shaft 12 which revolves in bearings 13, secured to the side of the bin A. The shafts 9 project through the side of the bin A and oppositely threaded worm wheels 14 having the hubs 15 are revolubly mounted on the shafts. The

worm wheels 14 are operatively connected to the shafts 9 by means of clutch mechanisms 16 operated by clutch levers 17. The shaft 12 carries the oppositely threaded worms 18 which engage the worm wheels 14:, causing them to revolve in opposite directions.

I have found that the best results are obtained if the shutter blades 8 revolve at about one revolution every four to ten minutes,

which is sufiicient to keep the coal stirred up and also requires very little' power. These blades are so located and operated in the outlet 0 that they pass upwardly along the sides of the bin (as indicated by the arrows in Fig.1) and downwardly in the center in order to prevent packing at the sides of the bin which might occur if they were revolved in the opposite directions.

When it is desired to shut oif the flow of coal from the bin, the clutches 16 are disengaged from the worm wheels 14, and the shafts 9 are turned independentlly by a wrench applied to the squared ends 9 thereof, projecting beyond the bin at the side opposite the worm wheels. The shafts will be turned until the shutter blades 8 both lie in a horizontal plane in the outlet C, as indicated in Fig. 3, and, although there is a slight clearance between blades and between the blades and the sides of the bin, I have found that it is not suflicient to allow any leakage of coal.

The screw feeder 7 may be driven in any.

26 with the feeder mechanism through anysuitable speed reducing mechanism (not shown). Pawls 25 are secured to the reciprocating shaft 22 and engage the ratchet wheels 21, causing them to revolve slowly in opposite directions upon movement of the shaft 22.

When it is desired to move the shutter blades Bindependently, the pawls are lifted, and the shafts 9' turned by means of a wrench until the blades assume a horizontal position in the outlet C, as explained in connection with Figs. 1 to 3. It will be seen that in both forms of the device the shutter blades are kept in substantially fixed angular relation to each other when revolving, so that at no position will they both lie in a vhorizontal plane and thus shut off the supply of fuel when used as agitators. There will be a slight variation in the angular relation of the blades shown in Figs. 4 to 6, owing to the'fact that when one blade is moving, the other is stationary, but, for all practical purposes, they may be said to revolve in fixed relatio It will be seen that I have provided a coning of the coal and consequent strain on the mechanism has also been eliminated.

I claim 1. Apparatus for supplyin finel divided material including a source 0 supp y havin a discharge outlet and an agitator in sai outlet inc uding a plurality of revolubly mounted shutter blades.

2. Apparatus for supplying finely divided material inclu g a source of supply having a discharge outlet, an agitator m said outlet including a pluralityfl f revolubly mounted shutter blades, and means whereby said blades may be operated to form a closure for said outlet.

3. Apparatus for supplying finelydivided material including a source of supply having a discharge outlet, an agitator in said outlet including a plurality of shutter blades, and means whereby said blades may be re volved in substantially fixed relative positions.

4. A paratus for supplyin finel divided materiiil including a source af sugply having a discharge outlet, an agitator in said outlet including a plurality of shutter blades, and means whereby said blades may be revolved in substantially tion.

5. Apparatus for supplying finely divided material including a source of supply having a discharge outlet, an agitator in said outlet including a plurality of revolubly mounted shutter blades, an actuating shaft, and means whereby said shaft ma be releasably" connected to said shutter bla es.

6. Apparatus for supplying finely divided material including a source of supply having a discharge outlet, an agitator in said outlet including a lurality of shutter blades, and means where y said blades may be revolved in opposite directions.

7 .7 Apparatus for supplying finely divided material including a bin having a discharge outlet, an agitator in said outlet including a plurality of shutter blades, and means whereby said blades may be revolved so they pass upwardly along the sides of the bin.

8. Apparatus for supplying finely divided material including a source of supply fixed angular relahaving' a discharge'outlet, an agitator 1n said outlet including a plurality of revolubly mounted shutter blades, an actuating shaft, means whereby said shaft may be releasably connected to said shutter blades, and means whereby said blades ma be independently operated when released rom the shaft 9. Apparatus for supplg'ing' finely divided material including a bin aving a discharge outlet, an a' 'tator in said outlet including a pluralit o shutter blades, revoluble shafts upon w ich said blades are mounted, an actuating member, and means whereby said shafts may be releasably' connected to said actuating member. q

.10. Apparatus for supplying finely 'di- -videdmaterial including a bin having a discharge outlet, an agitator in said outlet includmg a pluralit of shutter blades, revoluble shafts upon w ch said blades aremounted, a worm wheel revolubly mounted on each shaft, said worm wheels being oppositely threaded, oppositely threaded worms engagmg each tween each shaft and worm wheel, and

worm wheel, a clutch member be- Lassen a means whereby said worms may be revolved, shaft, worms engaging each worm wheel, a 11. Apparatus for supplying finely diclutch member between each shaft and worm vided material including a bm having a diswheel, and means whereby said worms may 1 charge outlet, an agitator in said outlet inbe revolved. 5 eluding a plurality of shutter blades, revolu- In testimony whereof I have hereunto ble shafts upon which said blades are mountsigned my name. ed, a worm wheel revolubly mounted on each HENRY KREISINGER.

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