US1135796A - Coal breaking and screening machine. - Google Patents

Description

J. L. HILLER.

COAL BREAKING AND SCREENING MACHINE.

APPLICATION FILED MAY I. 1911.

mm Pat nted A101". 13, 11.915.

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COAL BREAKING AND SCREENING MACHINE.

APPLICATION FILED MAY 1, 19H.

Patented Apr. 113, 19115.

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CBUSHER COMPANY, OF NEW YORK, N. Y., A 1:11.

ORATION 018 NEW YORK.

COAL BREAKING- ANID SCREENING CHIN 1E.

Specification of Letters Patent.

Patented Apr. t3, T915.

Application filed- May 1, 1911. Serial No. 624,291.

To all whom it may concern:

Be it known that T, JOSEPH L. HILLER, a citizen of the United States, and a resident of Mattapoisett, Plymouth county, Massachusetts, have invented certain Improvements in Coal Breaking and Screening Machines, of which the following is a specification.

One object of my invention is to provide a coal breaking and screening machine of the rotary drum type, with such a construc: tion and arrangement of parts as will give a better and more rapid screening action as well as cause the machine to operate at a higher elhciency than has hitherto been attainable.

T further desire to provide a coal breaking device of the general type noted, with lifting and screening shelves of such construction and mounting as will permit a greater number of them being used in a drum of a given size than has hitherto been considered advisable; the arrangement being such that the machine shall possess a relatively high capacity for a given size and at the same time shall require a relatively small amount of power for its operation.

Ainother object of my invention is to provide a coal breaker with a novel arrangement and proportioning of lifting and screening shelves whereby the material under treatment is discharged from the machine in pieces of the desired size in a minimum of time after its delivery to said machine.

These objects and other advantageous ends ll secure as hereinafter set forth, reference being had to the accompanying drawings, in which Figure l, is a vertical section of a coal breaker embodying my invention; Fig. 2 is a fragmentary vertical section illustrating a portion of a coal breaker drum equipped with a special form of screening and discharging shelf; and Figs. 3 and 4 are diagrammatic sections showing certain of the .shelves in developed form.

In the above drawings, 1 represents portions of a supporting structure provided with bearings 2 in which are rotatably mounted two relatively short shafts 3. These latter are fixed to and form part of, a 1'01 tary screen drum 4: consisting of a series of beams 5 extending substantially parallel to the line of the shafts 3 and held by suitable bolts to the head 6 and7. v To the former of these is fixed a gear 8 whereby the drum may be driven from any suitable source of power.

The beams 5 are preferably of I-section and are arranged equi-distant from the line of the shafts 3 so as to serve as a support for a cylindrical screen 9 which is mounted on their inside *portions between the two heads 6 and 7. Bolted in any suitable manner to the interior surface of this screen and projecting radially inward therefrom are a series of lifting and screening shelves 10 extending longitudinally of the drum and each consisting of a flat perforated plate rigidly fixed to one or more brackets 11 so as to he in a radial or substantially radial plane. The bolts holding these brackets in position may be likewise employed as part of the means for connecting the screen drum to the beams 5. Said shelves, moreover, are preferably provided with slots forthe reception of the bolts whereby they are.held to the brackets 11 while being radially adjustable toward and from the interior drum surface. While any desired number of these shelves may be provided, I have found it feasible to employ eight in the case illustrated and T mount between them a number of inclined conveying plows l2, staggered relatively to each other in order to insure a movement of the material under treatment from the admission to the discharge end of the machine. For the purpose of finally discharging material which reaches this latter end, ll provide adischarge plow 13.

The perforations in the drum 9 are usually circular holes of suitable size so that the material treated may escape through them when it reaches a predetermined degree of fineness and in addition to being perforated, the plates 10 are spaced the same or difl'erent distances from the surface of the screen device so as to admit the passage ,through said space of material under a certain slze.

The material to be broken and screened is admitted to the drum through a trough 14 and under operating conditions the various shelves engage such material and after raising it to the upper portion of the drum, drop it so that it is broken and more or less cominuted. As is obvious, the greater part of the line material so formed passes out of the machine through the perforations of the gal , ings in said shelves or between the outer edges thereof and the surface of the drum, sliding down'over said surface and escaping through the perforations therein. The work of turning the machine is thus materially lessened, owing to the smaller quantities of material-raised, and the time required for the material to pass through the machine is also considerably lessened.

The plows 12 give the material a movement from the head 6 toward the head 7,

though before it can reach this latter head,

it is sufiiciently broken, either by falling from the top of the machine or by reason of being struck by falling lumps, to permit it passing through the openings in.the screen 9 and thus escaping from the machine. The material finally removed by the plow 13 consists of iron, wood, stones, iron pyrites, slate orother material which cannot be broken during its passage through the drum from the feeding spout or trough 14. I

As indicated-diagrammatically in Figs. 3 and 4,1 may so arrange thevarious shelves, etc., in my machine so that a minimum amount of material is carried up or moved through it, and with this idea in view, the various shelves and plows are arranged in sets. Thus the shelves 10 are formed 'to have relatively large perforations so that all. but the very coarsest material will pass:

through them. Between this shelf and a shelf 10 is an inclined screen and conveying plow or shelf 12* which has perforations less in size than those in the plate 10 so that it will carry up and drop material which the first plate or shelf would permit to escape through it. Moreover, it will be noted that the openings inthis inclined shelf or plate 12 are larger adjacent the discharging edge thereof, so that the material sliding upon and passing through it is delivered in more or less equal masses of different sized pieces, being thus to some extent classified. The

straight shelf 10 which lies in a radial plane 1 is likewise provided with perforations smaller than those of either of the shelves 10' or 12. A third radially mounted fiat shelf 10 likewise has openings less in sizethan those in the shelf 10 and similarly a fourth shelf 10 has smaller perforations than those of the shelf 10 Intermediate the latter and the shelf 10 is another inclined shelf or plow 11.2 having perforations which increase in size from its entering or advancing edge to its discharging edge and the third inclined shelf 12 is similarly mounted .between the shelves l0 and 10; the perforations of this last inclined shelf also increasthe last shelf 10.

ing in size from its advancing to its discharge edge. According to this construction, therefore, it will be seen that there is an inclined shelf between each pair of radial shelves and that the openings or perforations in all of the shelves decrease in size from those in the first shelf l0 to those in In addition the sizes of the openings in the inclined shelves increase from the advancing to the discharge ends thereof.

One result ofithis construction is that a better distribution of the material under treatment is secured within the machine, for on account of the agitation occurring under operating conditions, the fine material on any shel quickly passes through the openings thereof and is caught by the succeeding shelf unless it is so fine as to pass therethrough. Thus the larger pieces of material are first raised and dropped and then the successively smaller pieces, the material in the machine being thus very quickly reduced to such a size that it passes through the openings in the screen drum,- such passage being facilitated by reason of the separating and distributingaction of the various shelves described and illustrated. While in the case illustrated I have shown two sets of the shelves above described, it is obvious that one or any number of such Sets may be used without departing from my invention.

In some cases I may employ shelves of the construction shown at 16 in Fig. 2, where sheet metal or cast structures having an angular section and Perforated on one face, are

11 set over suitable formed and relatively large of my invention in which a pair of oppo sitely inclined screens 21 and 22 is mounted above a radial screen 23; the first screen 21 (of the construction shown in Fig. 2) discharging outside of the machine the material passing through it and delivering onto the screen 22 any material which fails to so pass. While the screen 23 has relatively small perforations which are preferably the size of those in the screen drum, the screen 22 has openings which increase in size from one end thereof to the other, thereby evenly distributing on the succeeding screen the material which passes through said screen 22.

It is to be understood that in using the word radial I do not wish to confine myself to the use of shelves or other screening structures whose elements if prolonged, would intersect the center line of the screen drum, since it is obvious that the angles of lid such screen surfaces to the interior drum surface may, and usually will, be varied to adapt the machine for proper operation on the particular material handled and at any particular speed.

I claim 1. The combination of a rotatably mounted screen drum consisting of a frame and a continuous cylinder of perforated sheet metal mounted thereon; said cylinder having an unobstructed opening, in its cylindrical surface; With a perforated shelf mounted Within the drum adjacent the opening in position .to discharge material passing through its perforations out of said opening.

2. The combination of a rotatably mounted screen drum having an opening in its cylindrical body; with a shelf having a perforated portion inclined toward one end of terial passing through its perforations.

3. The combination of a rotatably mounted screen drum with a series of perforated shelves mounted in the same, the perforations in said shelves decreasing in size from those in the first shelves of the series to those of the last shelf; and the perforations in certain of the shelves increasing in size from one end of the shelf to the other.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

JOSEPH L. HILLER.

Witnesses:

WILLIAM E. BRADLEY, WM. A. BARR.

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