US2191322A - Apparatus for handling coal - Google Patents

Description

`-Fel. 20, 1940'. M. A. MATTHEWS v APPARATUS lFOR HANDLING COAL Filed June 26, 193'? 4 Sheets-Sheet 1 mmomwn. .w zmmmum @z m i Il2,191,322l

`Feb. 20, 1940.`

M. A.' MATTHEWS APPARATUS FOR HANDLING COAL Filed June 26, 1937 4 Sheets-Sheet 2 /NVE/v TOR MAX A. MATT H EWS,

BY @emr/L. m mw,

ATT'Y Feb. 20, 1940.V yM, A. MATTHEWS 2,191,322

APPARATUS Fon HANDLING con.v

Filed June 26, 1937 4 Sheets-Sheet 3- ATT'Y /NVENTOR MAX A MATTHEWS,

BY mfr/PWA,

Feb. 20, 1940. M. A. MATTHEWS 2,191,322

' APPARATUS Fon HANDLING coAL Filed June 26, 1937 4 Sheets-Sheet 4 VE/v TOR A TT'Y MAX A. WIATVv-nwsl ...f1 .l nu? l? S? io o mm W ArPARATUs Fon HANDLING coAL lMax A. Matthews, Columbus, Ohio, as'rsignor to The Jeffrey Manufacturing Company, a.Y Vcorporation of Ohio Application .rune ze, 1937, smal No. 150,610 2 claims. (Cl. 20s-'7247) This invention relates to apparatus for hancoal is delivered to the slack conveyor I4 by dling coal and-an 4object of the invention is to which it is delivered to a slack chute I5` for provide for the delivery of diierent size ranges delivery into a slack coal car. The next larger of coal to coal cars substantially free of undesize range .from the sizing screen I3 is `deliv 5 sirable slack. l ered to they apron conveyor or nut picking table Another object -of .the invention is to'provide I6.,V This size range 0f COal iS generally desigapparatiis for screening coal with alminirnum nated as nut coal. The next larger size range .formation of slack after the coal has been-pickedy of coalis delivered by the sizing screen I3 to to remove refuse. f. g Y f the egg picking table or apron conveyor I`I. The

w "Still another objectA ofthe invention is to prolargest Size range of c oal is delivered from the A vide a material handling apparatus in lwhich Sizing screen |3 t0 the lump picking table 01 material may be selectively delivered to a pair apronconveyor I8. i of conveyors one -of Vwhich is'preferably a mat It Will be undClStOOd that the picking tables screen conveyor. l I6, I7 and I8are so constructed that'plckers may Other objects of the invention will appear watch the coal asl it progresses over them and 15 hereinafter.,.the novel features and combinations may manually 'remove'any particles of refusa i beingset forth in the appended claims. such as shale or slate, and throw said refuse into f In the accompanying drawing@ adjacent chutes, seen at I9, and 2I adjacent Fig. 1 is a diagrammatic plan view of a systhe DClilHg tables I6, Vl and .lfreSDCVelyl0 tem comprising my inventionV which may be vThereare groups ofpairs'of chutes I9, 20 and 2I 20 :utilized to carry out the method of my invenadjacent each side of the picking tables l5, Il tion; land I8, respectively, thus providing for two pick- Flgs, 2 and 3, placed `and to end. show in ele'- ers for each table, one on each side thereof. vation an important portion of 'the apparatusY` Said `chutes I9, 20 and 2I all lead to a refuse 'f UNITED STATES APiss-relai* oFFicE s' comprising my invention;l l -scraper conveyor 22 which conveys the received 25 Fig. 4 is a plan View 4with parts cut away showrefuse l50 a refuse bln 23- f ing a combined feeder and Screencompsing my Associated with the nut picking table I6 is a invention; nut loading boom 24; the free end of which may Fig.- 5 is a side elevational view of the device be lowered and elevated to discharge the nut.,

of Fig. 4; coal into a car without appreciable. drop there- 30 Fig, 6 is a, sectional deva/cional View taken on of.. A small stationary screening chute 25 is the line 6-6 of Fig. 4 looking in the directionl interposed 'between the dSChrge v@mi 0f the of the arrows; Y nut picking table IG and the nut loading boom Fig, 7 is a, Sectional elevational View taken on 24. This chute effects .the transfer ofthe nut.'

u the line .1 1 of Fig. 4 looking in the direction o f Coal lrom the former t0 the latter, and at the 35 the arrows; and' same time effects the screening thereof to re- Fig. '8 is an emarged v159,11 Showing the conmove any slack. 'This slack is discharged to the c struction of the mal; of my combined feeder and upper runl 39 of a transversely extending mixing Scl-en Y l conveyorr 25 which leads ultimately to a reduc- 0 Referring first to' Fg 1 0f the drawings, there ing Crusher 2T. The bottom of the screen chute 40 isseen a schematic showing-of a systemcom- 25 S alSO OI'mGdS 2 gate Valve Which may be ,prising my invention which is an illustrated Operated t0 discharge all 0f the material from embodiment of one ,'fo'rm of apparatus which may the nut picking table I6 Onto the mixing. conbe'employed to carryoutthe method'also com- ,VCYOY 26- l I y .prising my invention.V `In'said Fig. 1 a-tipple isv Associated with the egg picking table II is 45 designated generally by the reference character 'an egg IOadiIlg bOm 28 between Which iS inter- ID and comprises` a building or housing of the POSed ,a T12-Screening COIIVGYOI 29. The' Conusual type within which is fa' raw coal `storage SI'UCOH Oftlle ggg picking table l", egg 10m11-V hopper II within which the coal, which is to ing boom 28 and re-screening conveyor 29 are.,

vbetreatedand loaded, is lirst received. AfeederY illustratedl in Amore complete detail in Figs. 2 5o l2 ,is `provided toj feed the raw coaifrom the and 3 of the drawings andwill' be described in` hopper II vto av shaking or sizing screen and feedfull detail hereinafter. v v f er I3 by which the raw coal will be separated rAssociated with the lump picking table I8 is a into four size: rangesand deliveredalongyfourv lump loading boom 30 between which 'is inter- A u' different paths. As here illustrated, the slack posedare-screening conveyor 3I. The construc- 55 pulley 35 and tail pulley 36, the latter of which is driven from a motor 31.

The picking table l1 receives a predetermined size range of coal from the sizing screen I3 which is discharged from the hinged boom 33 either to a chute 38 leading to the upper run 39 of mixing conveyor 26, as illustrated in full lines in Figs. 2 and 3, or directly to the re-screening conveyor 29, the detailed structure of which is illustrated in Figs. 4, 5, 6 and 'l and hereinafter described in detail.-

Said re-screening conveyor 29 is eiective to screen the coal and discharge the slack into the lower run 40 of the mixing conveyor 26 and to deliver the largerparticles of coal onto the loading boom 28. Said loading boom 28 includes a` stationary portion 4| and a pivoted loading portion 92 with a tail pulley 43 carried by the former and a head pulley 44 carried by the latter. A continuous apron 45 extends between the pulleys 43 and 46. An electric motor 46 is provided to drive the apron 45, which motor also drives the drive shalt 41 of the re-screening conveyor 29.

It is evident that with the boom 33 in the full line position illustrated in Figs. 2 and 3 of the drawings, coal from the picking table |1 will be delivered to the upper run 39 of the mixing conveyor 26. A similar condition may also be realized with the picking table .|8. It is also evident that all material delivered to the upper run 39 of the mixing conveyor 26 will be conveyed to the right, as viewed in Fig. 1, leading to the Crusher 21. However, the trough associated with the upper run of said mixing conveyor 26 is provided with appropriate valve means above each of the re-screening conveyors 29 and 3| that associated with re-screening conveyor 29 being seen at |26 in Fig. 2 of the drawings. As a con sequence, it is possible to discharge any material fed to the upper run 39 of the mixing conveyor 26 to the left of either of the rez- screening conveyors 29 and 3| onto a selected one of said rescreening conveyors 29 or 3|. For example, by opening the previously mentioned valve associated with the screening chute 25, the entire discharge of the nut picking table |6 may be delivered to the upper run 39 of the mixing conveyor 26. Said mixing conveyor 26 will then convey the material to the right, as viewed in Fig. 1. This material may then be discharged either to the re-screening conveyor 29 or the re-screening conveyor 3|, or may be discharged to neither and conveyed .further and discharged through a valve( 48 which leads to a domestic coal bin 49 by way of chute 59.

Still further, if desired, any material on the mixing conveyor may be delivered to the crusher' 21 by which it is crushed and delivered to the lower run 46 of the mixing conveyor from which it may be discharged by an appropriate valve in to the slack chute I5 or may be discharged onto a re-circulating crushed coal conveyor 5| by which it will be returned to the input of the sizing screen i3.

It is thus evident that a very flexible system is provided in which various mixtures of nut, egg, lump and slack may be fed over the booms 28 and 30.

With the hinged boom 33 in the dotted line position illustrated in Figs. 2 and 3, the picked egg coal will be delivered directly to .there-screening conveyor 29 which is effective to screen out the slack and deliver it to the lower run 40 of the mixing conveyor 26 while delivering the larger particles of coal to the loading boom 28. l

Ariimportant feature of my invention resides in the provision of the re-screening conveyor 29 in that this conveyor forms the double function of delivering material from the picking table |1 to the loading boom 28 and at the same time Vremoves the slack therefrom by a substantially horizontal movement of the material with a result that the re-screened coal is fed to the loading boom 28 with va minimum of shock and jar so as not to produce any further slack as an incident to this treatment. It has been found in practice thatV where inclined stationary or shaking screens are employed to feed a loading boom such as the loading boom 28, the coal, in discharging from the end of the inclined screen or chute, strikes the apron of the loading boom with such a velocity that there is an appreciable formation of slack and kthus the work of the rescreening device is substantially n'egatived. I have found by employing a substantially horizontal type of re-screening conveyor no appreciable slack is formed thereby with the result that 'the coal, such as egg or lump, or a mixture of v63 (see Fig. 4), and an idler shaft 54 mounted upon chain adjustingY devices 55 and provided with idler sprockets 56,. It will be understood that thereare two ofthe chain adjusting devices 55, one at each end of the shaft 54. Y

Extending between the shafts 41 and 54 and riding on the sprockets 53 and 56, is a continuous mat type of screen conveyor 51 formed by'a plurality of malleable iron block links formed by integral side bars and end barrels, as best seen in Fig. 8, and attached to articulate about transversely extending rods 58, thus providing a trouble free and long life mat screen.

Positioned above the main frame 52 is a hopper 59 at the material receiving end of which is formed a stationary chute 60 within which is associated a pivoted chute 6| pivoted aboutl bolts 62 and having arms 63 to swing said chute about the axes of bolts 62. The pivoted chute 6| is provided to permit therpivotal adjustment of the hinged boom 33, as illustrated in Figs. 2 and 3 of the drawings, the arms' 63 cooperating with appropriate pins 64 carried by the hinged boom 33 to lift the chute 6| out of the path of travel of said hinged boom 33 when the latter is elevated, Due to the action of gravity the pivoted chute 6i will move into material receiving posinon automatici-luy .Adjacent the'fnrward ena-0f the hopperlss isvprovided a veryshort and gradually inclined feed chute 65 for discharging materialffrom the res'creeriing conveyor-29' onto the apron 45 of the which directs slack which passes through the openings afforded by the mat screen conveyor 51 into the lower run 40 of the mixing conveyor 26.

Associatedfwiththeupper run of the'screen Q 'over these severalpicking tables, operators or conveyor 51 Iprovide a valve means which may be operated to shutoff entirely or to regulate the amount of screening effected thereby',- vSaid valve' means'comprises a stationary top lplate 61 extendi ing transversely vcompletely between the side members of the main frame 52 and thus entirely Y' is positioned-'abovea Vplurality of longitudinally only approximately half, the lengththereof, and j j dent' that a large 'multiplicity of combinations of extending bars 68 the outermost ones offwhich ,extend substantially the full le gth 'of the rescreening conveyor--29While` the others extend form agrizzly adjacent the front end thereof which loperates to 'support the mat screen conveyor 51, as clearly illustrated in Fig. 4 of theV drawings. Said bars 68 are supported on trans- .V` versely extending angle members |68 forming part of the main frame 52.

Positioned below the plate 61 and above the bars 6B is a longitudinally slidable plate 69 prothus toprovide an entirely closed bottom for the hopper 59 or to provide an opening of adjustable size for said hopper 59. This construction is particularly useful where an unsized coal is to be i'ed -to a car. in which case no attemptis made to remove the slack. This is 'another feature which extends even farther the exibility of the system comprising my invention. l

Referring particularlytoFig of the drawings.

'- Iit will be seen that a supporting plate 14 is pro- V '.vided adjacent the front end of the re-'screeningV conveyor 29 to support the lowerrun ofthe mat screen Y51 during the rst portion of its return Y. travel where any, slack whichhas fallen through I drive for the apron 45 Vand the mat screen 51V the upper run thereof will be scraped into the hopper 66. Substantially midway between the sides of the hopper 66 Iprovideza transversely.-

vextending pipe 15 to support the mat screen 51 above which I position a wiper 16 to insure the* removal of any material' which may tend to adhere to the top surface ofA the lower run of said ,Y

mat screenr 51. f

It may additionally be mentioned rthat'lthe includes the motor 49, seen in Fig. 2, which drives "a pulley 1 1 through a plurality of V-belts 18, said pulley 11 being mounted ona countershaft 19 which carries a spur gear 80 meshingwith a large gear 8| mounted upon a drive shaft 82 upon which is mounted the tail pulley 43 of the loading:

boom 28. Appropriate chain and sprocket means 33 is provided for driving the/drive shaft 41 of the re-screening conveyor 2 9 from the shaft 82.

upon the lowering of the In the operationof the apparatus comprising Y the shakingorsizing screen and feeder I3 by which it is separated into' four different size ranges comprising slack, nut, egg and lump coal.

Slackcoal is conveyed directly by slack con- Vvveyor I4 and slack chute4|5 toa slack car, The

nutcoal, egg coal v and lump coal are delivered VVrespectively to the n ut picking rtable I6. the egg pickers will manually remove visible refuse, such as shale or slate, and'throwV it into one ofthe chutes I9, 20 for 2|, by which it will be delivered to a refuse chute V22, and conveyed to a'refuse bin 23.

From the pickingtables I6, I1 and `I8, or.any of vthem selectively, vthe coal 'may loeV discharged either to the upper run 39 of kthemixing conveyor 2 6 or to its respective loading boom, such as the devices 25, 29 and 3|, respectively.

By virtue of the mixing conveyor 26 it loading booms 24,. 28 and 30, over thescreening is evisize ranges may be combined on a single loading boom. As a typicalillustration, the egg'picking table I1 may discharge to the-upper run 39 of `|8 may be d ischarged directly onto the re-screening conveyor 3|. It is thusv evident that there vwill Abe a mixture of bothoegg and lump coal on there-screening conveyor-3| which will be loaded by it onto thelump loading boom 30. In this instance, a combination of egg and lump coal will be fed to the car positioned below the loading boom 30.

At the same time, any slack delivered either from the mixing conveyor 26 or from the picking table I8 tothe re-screening conveyor 3|,

will be screened out and discharged into the lower "run 40 of the mixing conveyor 26, by which it ,will

be'conveyed to the slack chute. I5.'v

y If desired. the gate mechanism, including theY slidable plate 69, associated with the re-screening device 3|, will be closed, in which case any slack contained in the coal received by the rescreening devilce 3| will not be removed,y but will be dischargedonto the loading boom 30.'

As another illustrative operation, 'lit may be found that there is too much lump coal coming over and not enough nut coal. Toremedy this situation, the lump coal may be fed into the `upper `run 39 of the mixing conveyor 26 and delivered to the crusher 21 Which will reduce I it to a maximum size and discharge-it `to the lower run 40 ofsaid mixing conveyor 26.

Said lower run 48m'ay thereafter be controlled to conveyor which will deliverV thef'cru'shed coal tothe sizing screen I3, the same as if it were V my invention withthe consequent realization of the methodcomprising my invention, raw coal stored inthe hopper II is fed by the feeder I2v to the mixing conveyor 26 and by said upper run 39 Vdischarge into the re-circulating crushed coal By virtue of this construction there is practically no production of'slack after the coal is discharged from the re-screenng conveyor 29 or 3l, and thus when desired, the coal, such as egg or lump, is delivered to the car substantially free of slack, In general, it is not necessary to employ this precaution in connection with the nut coal because this coal is not of suicient size to cause appreciable formation of slack even though discharged over an inclined chute type of screen. If desired, however, the rescreening device may also be employed in connection with the nut picking table and loadingr boom.

Obviously those skilled in the art may make various changes in the details and arrangement of parts'without departing from the spirit and scope of the invention as defined by the claims hereto appended, and I therefore Wishu not to be restricted to the preciseA construction herein disclosed.

Having thus described and shown an embodiment of my invention, what I desire to secure by Letters Patent of the United States is:

manana 1. 1n combination. a. horizontally disposed continuous travel mat screen, a conveyor positioned thereabove, an adjustable pivoted boom conveyor having an adjustable free vdischarge and positioned to feed said screen or said conveyor, and a feed chute pivoted to said screenV and swingable by said pivoted boom into and out ofV feeding position as said boom is adjusted to feeding or non-feeding position with respect 1 .to said screen.

2. In combination, a pair of conveyors spaced vertically apart, the lower one being an endless mat screen conveyor, a pivoted boom having a freely adjustable discharge end adjustable to feed either conveyor, a pivoted chute for guiding material vfrom said boom to said lower conveyor and positioned in the path of said boom during upward movement thereof, and` means operable by said boom to pivot said chute and swing it out of the path of movement of said boom as the latter moves upwardly and to swing said chute into operative position as the boom moves downwardly.

f MAX'A. MATTHEWS.

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