US1452081A - Automatic stoker - Google Patents

Description

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K. JUENGLING AUTOMATIC STOKER 2 sheets-Sheet l1 Filed May 27, 1918 N VEN To@ Of V724? LILSUSE 2 Sheets-Sheet 2 MSR Apr. 17, w23.

K. F. JUENGLING AUTOMATIC STOKER Filed May 27 1918 Patented pr. B7; w23.

KL F. JUENGLING,

OF LAKEWOOD, OHEO.

AUTOMATIC STUKER.

Application led May 27,

To all lwhom it may conce/vw.

Be it known that I, KARL F. JUnNGLrNG, a citizen of the United States, and a resident of Lakewood, county of Cuyahoga, and State of Ohio, have invented a new and useful lmprovement in Automatic Stokers, of which the following is a specification, the principle of the invention being herein eX- plained and the best mode in which l have contemplated applying that principle, so as to distinguish it from other inventions.

The present improvements, relating, as indicated, to an automatic stoker, have regard moreparticularly to the provision of a self contained mechanism of this sort, including in a unitary structure not only suitable grate means for burning the fuel in the furnace chamber, but also means for feeding the fuel to and advancing the same along such grate, and means for producing a forced draft in order to insure the thorough combustion of such fuel. A further object is to mount all the aforesaid means on a truck or like movable support, whereby the mechanism as a whole may be advanced into position in the furnace chamber or withdrawn for the purpose of inspection and repair, as may be desired. A further object is to provide an improved form of grate bar or plate, whereby the feeding of the fuel is facilitated. To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following description set forth in detail certain mechan ism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings: f

Fig. 1 is a plan View ofa stoker embodyingr my present improvements; Fig. 2 is a side elevation and section of the same, the plane of the section being indicated by the line 2 2 Fig. 1; and Fig. .3 is a rear elevation of said mechanism.

The stoker will be readily recognized as of the over-feed type, and fits, in the operative position shown in Figs. 1 and 2, into a suitable opening 1 in the front wall 2 of the furnace chamber, the grate 3, proper, extending rearwardly and downwardly towards the rear wall 4. As previously indicated, not only such grate, but all of the 1918. Serial No. 236,667.

various accessory parts are mounted on a frame 5, so as to form a self contained unit capable of being thus placed in the furnace chamber or removed therefrom, as occasion demands. To this end, the frame is preferably provided with rollers 6 running on rails 7 that extend longitudinally of the chamber, such rails also serving to support the ash pan or plate 8 that closes the rear of the furnace floor. The innermost portion of the grate is supported at a sufficient elevation to permit this plate to be drawn forwardly under the same, so that the ashes and clinker that accumulate thereon may be dropped into the ash pit 9 below.

The grate proper is made up of a plurality of series of superimposed plates 10, presenting, when assembled in place, the e'ect of. a series of shallow steps with inclined risers. These plates are removably fitted into suitably formed spaces between longitudinally extending members 1l of the frame, each plate holding the one below in place and the topmost of the series interlocking with the frame, so as to render accidental displacement impossible. yllhe plates are supported so as to leave openings 12 between the lower end of each and the top of the one below, through which an air blast may be passed by the draft mechanism presently to be described.

Before referring to the draft mechanism, however, the means for supplying fuel to the upper portion of the grate andfor advancing or feeding the same down to such grate will be set forth: The current supply is designed to be contained in a hopper 15 mounted on the frame 5 so as to lie alongside the front wall 2 of the furnace chamber.

ln this hopper there works a reciprocable slide 16 ywhereby the fuel is allowed to drop onto the topmost plates 10'of the grate and is gradually forced down over the plates. Slide 16 ispreferably movablev in the same plane as that of the grate and is provided with a series of fingers 16a that lie between the several series of plates comprising such grate. These fingers, in other words, re'st on the frame members 11 and extend down to a point where the coking of a bituminous coal starts, their action being to keep the coking coal broken up and so to reduce the tendency for building up into a large mass. lt will ordinarily be desirable to supplement the feeding action of such slide in the bottom of the hopper and the fingers carried -thereby with a second slide 17 located at an intermediate point in `each series of plates, a suitable space 18 beingyleft for the purpose through which such slide may project in its advanced position. The slides 16 and 17 are operated ,simultaneously by the oppositely directed arms ofa double bell-crank 19 that is connected to be oscillated from a drive shaft 20 mounted in transversely disposed bearings on the rear of the frame just below the hopper 1 5.

The sides and bottom of the frame are enclosedA by a suitable casing 21 and the space within such casing is divided into two chambers by the partition 22, in which the lowermost slide 17 is held, valves or gates 23 and 24 being provided whereby these chambers may be more or less shut off from the current of air supplied by the blower fan 25 mounted at the rear of the frame. This' fan as shown is operated by a direct connected steam turbine motor 26, the exhaust 27 from which is connected with the interior of the aforesaid casing, so that the steam is carriedalong with the air to the grate. This construction is not essential and an electric motor or other driving means ma be substituted to suit conditions.

he-mode of operation of my improved stoking mechanism should be readily apparent from the foregoing description. In the first place` it will be obvious that not only the grate proper but also the' fuel feeding mechanism, as well as the blower fan, are all carried on the same frame, which, being mounted on a truck, may be easily and quickly advanced into position in the furnace chamber or withdrawn therefrom. This presents a great advantage over any lconstruction at present in use, so far as I am aware, in that the necessity for a separate air conduit lea-ding to the furnace chamber with special foundations and other complications is entirely done away with` and yet all of the advantages of a forced draft in combination with an over-feed stoker is obtained. The utilization of the exhaust steam from the engine that drivesthe fan also presents obvious advantages, while not only the supply of fuel but also the distribution of the air blast may be readily regulated. Finally,

the construction and manner of support o the grate itself, as well a`s of the ashlor clinker plate, is of special utility.

Other modes of applying the principle of my invention may be employed instead of the `one explained, change being made as regards the mechanism herein disclosed, rovided the means stated by any of the fol owing claims or the equivalent of suc-h stated means be employed.

' I therefore particularly point out and distinctly claim as my invention 1. In a self contained movable Stoker, the combination of a frame adapted to be moved into and out cfa furnace chamber, a casing enclosing the sides and bottom of said frame, a furnace grate mounted on said frame and sloping downwardly to the rear of said -chamber and forming with said frame and Casin a unitary movable structure, a blower also mounted on said frame movable therewith and connected with said casing so as to supply a forced draft to said grate, and means within said casing for regulating the volume of the draft to the different parts of said grate.

2. In a self contained movable stoker, the combination of a frame adapted to be moved into and out of a furnace chamber, an enclosing casing for the sides and bottom of said frame and attached thereto and movable therewith as a unit, a grate mounted on said frame and sloping downwardly to the rear of said chamber, and fuel supply means mounted on said frame' and movable therewith. said means including a hopper and a movable slide in said hopper to discharge the fuel onto said grate. v

3. In a self contained movable stoker for furnaces, the combination with a furnace chamber, of rails extending therein, and an automatic Stoker comprising a wheeled enclosed frame supported on said rails so as to be movable into and out of said chamber. a suitable grate and means for supplying a blast of air to said grate, the air blast means with said frame and grate comprising a unitarystruc-ture substantially as described.

Signed by me, this 22nd dav of May. 1918.

' Y KARL F. JUENGLNG.

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