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Title:
IMPROVEMENTS IN MECHANICAL HANDLING APPARATUS FOR RECLAIMING MATERIAL FROM A STOCKPILE
Document Type and Number:
WIPO Patent Application WO/1980/000333
Kind Code:
A1
Abstract:
A stockpile drum reclaiming machine operable in either direction having (Figure 1) a twelve faced drum (14) carried on a gantry (2) provided with wheeled bogies (8) running on rails (10) over the length of the stockpile. The faces (74, 76) are arranged in pairs each pair with an interior angle of 165 and a T-section member (82) positioned externally along the arris to form opposed pockets (88, 90). Reclaiming, the drum (14) may be rotated and moved in either direction and alternative transfer conveyors (36, 34) carried on an arcuate beam (28) rotatable through a restricted arc are positionable to receive reclaimed material thrown clear of the drum after having been carried over in the appropriate pockets (88) or (90). Oscillatable luffable harrows (54, 56) are provided to each side of the drum (14) and are positionable to engage the stockpile (96) being reclaimed.

Inventors:
Cox E.
Application Number:
PCT/GB1979/000127
Publication Date:
March 06, 1980
Filing Date:
July 31, 1979
Export Citation:
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Assignee:
BABCOCK MOXEY LTD COX E.
International Classes:
E02F7/00; B65G65/20; (IPC1-7): B65G65/20
Foreign References:
GB1116429A1968-06-06
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Claims:
CLAIMS:
1. Mechanical handling apparatus adapted to reclaim material from a stockpile including a rotatable cylindrical drum mounted on a support structure or gantry running on rails each side of the stockpile characterised in that the support structure or gantry (2) is traversable in either direction over the length of the stoclφile (96) and carries first and second transfer conveyors (36, 34) respectively extending at each side of the drum (14) parallel to the axis thereof, and the drum (14) is rotatable in either direction and is provided with blind scoops or pockets (88, 90) open in opposed directions such that the blind scoops or pockets (.88) open in one direction serve with clockwise rotation of the drum (14) to scoop material frcm a first portion of the stockpile (96)" to one side of the dnm and, upon further clockwise rotation of the dnm, discharge the material therefrαn to the first transfer conveyor 36) at the side of the drun remote from the first portion of the stoclφile and the blind scoops or pockets (90)' open in the other direction serving with anticlockwise rotation of the drum to scoop material from a second portion of the stoclφile to the side of the drum remote frcm the second portion and, upon further anticlockwise rotation of the drum, discharge the material therefrom to the second transfer conveyor (34).
2. Mschanical handling apparatus as claimed in Claim 1, characterised in that the first and second transfer conveyor (36, 34) are mounted on a frame (28, 26, 24) carried on the support structure or gantry (2) and rotatable through a limited angular displacement about the drum axis to move the respective conveyors between an operative position and a raised position such that when one conveyor is in the operative position to receive material frcm the blind scoops the other conveyor is in the raised position clear of the stoclφile face,.
3. Mechanical handling apparatus as claimed in Claim 2, characterised in that the frame includes arcuate beams (28) carried on rollers (30) mounted on the support structure or gantry (2),.
4. Mechanical handling apparatus as claimed in any preceding claim, characterised in that first and second harrows(54, 56) are respectively positioned to each side of the drum (14) and are actuable to urge material toward a base region of the stoclφile face. 12.
5. Mechanical handling apparatus as claimed in Claim 4, characterised in that the first and second harrows (54, 56) are respectively supported from pivotable connections on the support structure or gantry (2) by struts (58, 60) pivoted on the support structure and ties (62, 64) connected through cables(66, 68) and pulley blocks to winches (70, 72) actuable to luff the harrows,.
6. Mechanical handling apparatus as claimed in any preceding claim, characterised in that the drum ig foirosd ith lat faces connected together in pairs (74, 76)with the included angle between the f ces of a pair being greater than the included angle between adjacent faces of adjacent pairs of faces, and strips (78) connected to the arrises between the faces of the pairs of faces extending radially outwardly and braced with webs (80) at spaced intervals are provided with tangentially extending strips (84) to foim opposed blind scoops(88, 90),.
7. Mechanical handling apparatus as claimed in Claim 6, characterised in that Tsection bars (82) located with flange portions forming the tangentially extending strips (84) are connected at web portions (86) thereof to the strips (78) welded to the arrises to foim the opposed blind scoops (88, 90).
8. Mechanical handling apparatus as claimed in Claim 7, characterised in that the web portions (86) of the Tsection bars (82) are connected to the strips (78) welded to the arrises by bolts.
9. Mechanical handling apparatus arranged and adapted to operate substantially as hereinbefore described with reference to the accompanying drawings.
Description:
OR RECLAIMING MATERIAL IEOM A STOCKPILE.

This invention relates to mechanical handling apparatus adapted to reclaim material from a stockpile of material such as iron ore or coal.

Previous mechanical handling apparatus adapted to reclaim material from a stockpile have included a rotatable cylindrical drum some six metres or more in diameter provided with external bucket scoops and mounted on a support structure or gantry running on rails each side of the stockpile. With advancement of the gantry and rotation of the dπiα the bucket scoops are moved through the material to load the material into the bucket scoops and, with continued rotation, discharge the material either through apertures in the drum to a conveyor extending through the interior of the drum or, as in GB Patent Specification No. 1326 340, over an outside surface of the bucket scoop next adjacent in the direction of rotation onto a conveyor extending alongside and parallel to the axis of the druπ,

The bucket scoops by their foπn, can only operate in one direction of rotation. This has the result that the reclaimer can operate only in one direction of movement of the gantry and thus requires that a clear plot of land of size equivalent to the size of the stockpile be provided adjacent the stockpile to permit return of the gantry to the initial end of the stockpile, or to an adjacent stockpile, after transfer to a set of rails

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running over the clear plot.

Furthermore, bucket scoops require the positioning of relatively ccπplex structures on the cylindrical drum, which structures are liable to wear rom abrasion arising both from movement into the stoclφile and rom discharge of material with a sliding motion either through the apertures in the drum or over the outside surface of the bucket scoop next adjacent in the direction of rotation onto a conveyor extending alongside and parallel to the axis of the drum.

It is an object of the invention to provide a mechanical handling apparatus adapted to reclaim material frcm a stoclφile of a simplified construction capable of operation in both directions and having a scoop arrangement less liable to su er abrasion than the previous arrangement.

According to the present invention there is provided mechanical handling apparatus adapted to reclaim material frcm a stockpile including a rotatable cylindrical drum mounted on a support structure or gantry running on rails each side of the stockpile in which, the support structure or gantry is traversable ±ti either direction over the length of.the stockpile and carries irst and second trans er conveyors respectively

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extending at each side of the drum parallel to the axis thereof and the drum rotatable in either direction and is provided with blind scoops or pockets open in opposed directions, such that the blind scoops or pockets open in one direction serve with clockwise rotation of the drum to scoop material from a irst "portion of the stockpile to one side of the drum and, upon further clockwise rotation of the drum, discharge the material therefrom to the first transfer conveyor at the side of the drum remote: from the first portion of the stoclφile and the blind scoops or pockets open in the other direction serving with anti-clockwise rotation of the drum to scoop material from a second portion of the stoclφile to the side of the drum remote frαn the second portion and, upon further anti-clockwise rotation of the drum, discharge the material there rom to the second transfer conveyor.

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:-

.Figure 1 is a side elevation of a blending, drum, reclaimer machine;

Figure 2 is a plan view of the machine; and

Figure 3 is a portion of Figure 1, to an enlarged scale.

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Referring to the drawings, the support structure or gantry includes a bridge box girder 2 supported on a pair of end frames 6 mounted on four powered, articulated bogies 8 running on rails 10 extending the length of a stock yard. The bridge box girder 2 is rigidly secured to one end frame 4 and pivotably πounted on the other end frame 6 to accαtroodate minor discrepan¬ cies encountered during motion of the reclaimer along the rails 10 A control cabin 12 is mounted on the bridge box girder 2 and is equipped to peimit drive of the drum reclaimer machine in either direction. The drum 14 is formed with closed end walls lβ carrying sha ts supported in spherical roller bearings in housings 18, 20 respectively mounted at one end on the end frame 4 rigidly connected to the bridge box girder and at the other end on a framework 22 suspended from the bridge box girder,

A pair of platforms 24, 26 are carried on the ends of a framework formed by arcuate I-beams 28. The arcuate beams extend over slightly in excess of 180° of arc and are supported on rollers 30 mounted on arms 32 on the supporting structure such that the arcuate beams 28 are rotatable through a limited arc about the drun axis. Rack gearing (not shown) is mounted on the arcuate beams and meshes with pinions rotation of which effects rotation of the arcuate beams between, for each end of the

beam, an operational position and a raised position. The plat- foims 24, 26, which extend over the width of th© supporting structure are positioned at the two ends of the arcuate beams such that when the respective end of the arcuate beam is in the operational position the associated platform extends horizontally. Each platfoirn 24, 26 carries a transfer conveyor 34, 36 extending parallel to the drum axis and a shield 38, 40 having a deflector portion 42, 44 arranged to direct material tcward the conveyor and a curved portion 46, 48 directing material back to the foφt of the stockpile, Further shields 50, 5§ are provided to the sides of the conveyors remote rcm the drum.

Harrows 54, 56 are provided on each side of the drum, and are connected to the bridge box girder with struts 58, 60 pivoted on the bridge box girder and are supported at their outer ends by ties 62, 64 connected through pulley blocks and cables 66, 68 running upwardly to winches 70, 72 on the bridge box girder for luffing the harrows. Articulated drives (not shown) are provided to the two harrows to effect lateral oscillation thereof to rake material frcm the ace . of the stockpile to the base thereof.

The drum is foimed with six pairs of flat faces 74, 76, the included angle between the pairs of faces being approximately 165° and the included angle between adjacent faces of adjacent

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pairs being approximately 180°. Strips 78 are welded to the external arrises between the faces of the pairs of faces and are braced at spaced intervals with webs 80 extending in radial planes perpendicular to the strips. T-Section bars 82 are located with flange portions 84 extending tangentially and are bolted through rib portions 86 thereof to the strips 78 welded to the arrises to foπn pairs of opposed blind scoops or pockets 88, 00 on the surface of the drum. Since the T-Section bars 82 are bolted to the strips 78 replacement . upon wear is thereby facilitated and does not involve the fabrication of complex structures. Alternatively, the whole structure of the scoops and even adjacent portions of the drum may be made replaceable, although this might complicate replacβnent.

Reclaiming conveyors 92, 94 (shown in outline) are positioned to either side of the reclaimer machine and extend parallel to the rails 10 over the length of the stockyard.

In operation, to reclaim material, such a iron ore or coal, frcm a stoclφile 96, the druπi reclaimer machine is advanced slowly into the stockpile, by driving the bogies 8, with the harrow 54 at the leading side of the drum recl imer lowered to engage the face of the stoclφile and the conveyor 34

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at the leading side positioned at the raised position clear of the harrow and the stoclφile. The leading harrow is oscillated to deliver material to the foot of the stoclφile and the drum rotated to move the pockets 88 upwardly through the base portion of the stockpile. Material is carried upwardly in the advancing pockets 88 of the pairs of opposed pockets and over the top of the drum to discharge downwardly clear of the preceding pockets 88 and 90 and onto the conveyor 36 at the trailing side of the drum. Any material not alling on to the conveyor is directed by the curved plate 48 back to the foot of the stockpile. The conveyor is driven to discharge in turn to either the reclaiming conveyor 92 or the reclaiming conveyor 94.

Upon reaching the end of the stockpile, instead of moving the drum reclaimer laterally to another, parallel, set of rails at an adjacent stockpile, the drum reclaimer machine may work in the opposite direction on the rails it is already on to reclaim frcm a stockpile deposited or stocked in the wake of the first run of the reclaimer by a separate stcκ3king conveyor. To advance the drum reclaimer in the opposite direction, the cable winch 70 of the harrow 54 that was in the operating position is actuated to raise that harrow, the rack and pinion gear are actuated to rotate the arcuate beams 28 and move the platforms

such that the platfoirn 24 that was in the raised position is lowered to the operational position and the other platform 26 is rotated to the raised position and the cable winch 72 of the harrow which was in the raised position is actuated to lower that harrow. The bogies 8 and the drum 14 are then driven in the opposite direction to the direction in the first run and the reclaimer operates as previously with the pockets 90 of the pairs of pockets not previously utilised carrying the material upwardly and over the top of the dr n to the conveyor 34.

The stockyard may be relatively long and narrow with a single set of rails 10 extending the length of the yard, a boon stacking machine running on rails to one side of the yard, or, alternatively the yard may be of sufficient width, to accαrmodate two parallel sets of rails 10 with a boom stacking ma running on rails between adjacent rails of the two sets, In the latter case, a transfer track extending perpendicular, to the rails 10 is provided at the mi dle or ends of the stockyard, or both, and jacking means are provided on the machine such that on urging the jacks downwardly, the bogies may be swung through 90 to engage the transfer track the machine being lowered to peimit lateral transfer of the machine from one set of rails to the other set and then raised and lowere again to position the bogies on the other set of rails. The

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harrows 54, 56 and the platfoims 24, 26 are then positioned appropriate to the direction of reclaiming raovanent required and the drives to the bogies and drum energised as necessary.