Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
  • B65G17/26—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface comprising a series of co-operating units, e.g. interconnected by pivots
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
  • B65G19/18—Details
  • B65G19/28—Troughs, channels, or conduits
  • B65G19/30—Troughs, channels, or conduits with supporting surface modified to facilitate movement of loads, e.g. friction reducing devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G37/00—Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes
  • B65G37/005—Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes comprising two or more co-operating conveying elements with parallel longitudinal axes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
  • B65G2201/04—Bulk
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
  • B65G2207/14—Combination of conveyors

Definitions

• the present invention relates to a conveyor suitable for use in conveying bulk material and especially to such conveyors capable of elevating such material.
• cover belt conveyors in which two belts are inter-engaged along a conveying path so as to seal the bulk material being carried within a confined space defined between the belts.
• a first carrier belt and a second closure belt both of which are generally "U"-shaped with corrugated sides.
• the carrier belt further has a plurality of regularly spaced upstanding plates which divide the carrier belt interior into a plurality of individual compartments.
• the present invention provides a conveyor suitable for use in conveying bulk material
• said conveyor comprises an endless carrier belt and an endless bulk material engage ⁇ ment means characterised in that said bulk material engagement means comprises elongate flexible connector means mounting a plurality of spaced apart paddles, said carrier belt and endless connector means being mounted for movement along a conveying path with said paddles projecting substantially into the interior of a channel defined by said carrier belt at least along said conveying path, in close proximity to the sides and base of said channel so as to engage bulk material within said channel in use of the conveyor and transfer drive forces between said connector means and ⁇ said bulk material during uphill or downhill conveying of said bulk material, said paddles having a shape, at least at their distal ends, corresponding generally to the cross-sectional shape of said channel, and with said connector means and said belt following a substantially identical path in a vertical plane along the conveying path where said belt and engagement means interengage, whereby movement of said paddles and said belt therealong is maintained in substantial synchronism.
• the belt and bulk material engagement means are normally only required to move together (with the paddles projecting into the channel) along inclined conveying paths so that where the conveyor is desired to include a generally horizontal conveying path section, the carrier belt may extend beyond the endless connector means, the latter being -3- guided towards and away from the carrier belt at/or proximity to end portions of the inclined conveying path section.
• uphill and downhill conveying of bulk material can be effected substantially without relative movement between the paddles and carrier belt in a direction along the ' conveying path thereby avoiding wearing of these parts and/or damage thereto resulting from such relative movement.
• such an arrangement allows a wide - variety of materials to be conveyed over steep inclines with varying or intermittent feed rates.
• friable materials can be readily handled with little or no degradation and wet, sticky, frozen, irregular shaped, and/or abrasive material can be carried with minimal accummulation on the conveyor and/or damage thereto.
• the bulk material may moreover range in size from fines to relatively large lumps e.g. 0.6m size on a 2m ' wide belt.
• a conveyor of the present invention it is possible substantially to fill the carrier belt with bulk material thereby allowing a high load capacity ' to be achieved for a given size of conveyor, and quite steeply inclined, e.g. 70° or more to the horizontal, conveying paths to be safely negotiated which in turn can result in substantial economies in the length of- conveyor required and its construction, allow increased flexibility in the routing of the conveying path and reducing site area requirements for the conveyor thereby minimising the site area sterilised by conveyors.
• the conveyor of the present invention permits easy and flexible loading arrangements and minimises cleaning requirements as well as facilitating such cleaning as may be required.
• the endless carrier belt and bulk material engagement means will generally be disposed in a back-to-back arrangement, being ' guided towards and away from each other at the beginning and end of said conveying path.
• the problems of material lodging and being retained between the two are further minimised.
• the carrier belt itself is merely required to support and carry the material without being required to provide any special additional function it can be made of quite plain construction e.g. a deformable flat belt, which is not only more economical than other more complex forms of carrier but also minimises the problem of material lodging in it and is easy to clean.
• the conveyor of the invention may be used with various forms of drive arrangement including driving of the endless connector means only and driving of both the elevator and the carrier belt.
• the carrier belt will be carried along indirectly by the friction between the bulk material engaged by the paddles and the carrier belt, or by direct engagement of the paddle edges with the carrier belt.
• Such arrangements are generally preferred since they avoid the need for using a relatively highly tensioned carrier belt, thereby allowing more economical belt constructions to be employed and/or providing increased belt life, lower replacement costs, and cheaper repairs by means of mechanical jointing instead of vulcanizing.
• the carrier belt components may be substantially identical to those used in conventional horizontal channel belt conveyors thereby simplifying design work and increasing reliability through the use of standard proven components.
• any suitable form of flexible connector means may be used in the conveyor of the invention including for exa ple, chains and cables. Conveniently two such connector elements are used, disposed at either side of the channel form carrier belt.
• the engagement means paddles are generally curved so as to define together with the channel defined by the carrier belt a generally scoop shaped receptacle, each said paddle forming a generally upright generally transverse wall curving round at opposite sides in a direction up the inclined conveying path.
• the paddle means progressively reduce in depth in said direction.
• the paddle means have generally transversely outwardly projecting mounting wings formed and arranged so as to extend over and down alongside the side walls of the channel formed by the carrier belt, for securing of the paddles to respective endless connector elements.
• the angle of inclination of the conveying path and/or the carrying capacity of the conveyor may be maximised without however the risk of significant accumulation and sticking of the bulk material on the carrier belt or bulk material engagement means.
• the conveyor of the invention also allows a wide range of feed arrangements to be used including side loading, loading on inclined or horizontal belt runs, and loading at intermediate levels, thereby avoiding the need for transfer points and tandem conveyors.
• the paddles may be further provided with resiliently deformable edge seals, at their carrier-belt co-operating periphery, to minimise escape of bulk material therebetween and to maximise drive transm ssion therebetween.
• they may be provided with deformable or deflectable central portions at their upper edges remote from said carrier belt engaging periphery, so that in the event of larger pieces of material becoming lodged between the driving and return runs of the elevator, these portions can give way and ride over the piece to avoid jamming of the elevator and/or possible damage to conveyor.
• the portions may be of flexible material such as rubber secured in the principal plane of the paddle or may be in the form of small rigid inset panels hingedly mounted and retained in the principal plane of the paddle by suitable spring means.
• the paddles are disposed so as to project generally at right angles from their direction of travel along the conveying path but advantageously they may be formed and mounted on the elevator drive trans ⁇ mission member so as to be inclined rearwardly with respect to an uphill direction along the conveying path.
• the elongate connector means could be in the form of a belt and this will help further to contain the bulk material within the conveyor.
• a cover plate means above the bulk material engagement means along the conveying path in order to minimise escape of dust etc.
• the present invention extends to conveyors with both horizontal and rising sections in which elevator means are provided only at the rising sections of the carrier belt, as well as to conveyor installations such as horizontal bunker conveyors and moving bed chain conveyors in which the carrier belt extends only substant ⁇ ially horizontally, short horizontally extending lengths of the bulk material engagement means being provided to boost driving of the horizontal carrier belt with the bulk material thereon, by engagement of the paddles with the bulk material or belt.
• any suitable arrangement known in the art for routeing of the return segments of the carrier belt and elevator may be used.
• the elevator will most conveniently be returned above the carrier belt with the carrier belt and elevator in a back-to-back arrangement.
• the return segment of the elevator could be routed around the carrier belt below the return run of the carrier belt.
• conveyors of the present invention including end loading, side loading, and top loading which may in turn be directly “through” the elevator the material being allowed to fall through either side of the paddles into the carrier belt either through both forward and return runs of the elevator or, more commonly through the forward, conveying, run only of the elevator as or just after it is brought into the "V" or "U”-shaped channel defined by the carrier belt, the return run being routed sufficiently far away from the conveying path at that point to allow introduction of material therebetween.
• a short conduit encasing the elevator immediately upstream of the beginning of the conveying path and extending along part of the return path of the elevator to permit top loading into the upstream end of the conduit, the material then being carried round the conduit by the elevator into the "U"-shaped channel defined by the carrier belt.
• end loading the material is loaded onto part of the carrier belt extending horizontally upstream of a position at which the elevator is brought fully together with the carrier belt.
• Fig. 1 is a side elevation of a conveyor of the invention
• Figs. 2 to 4 are detailed views of a paddle of the conveyor of Fig. 1 shown on an enlarged scale and in which: Fig. 2 is a side elevation; Fig. 3 is an end elevation; and Fig. 4 is a plan view; and Fig. 5 is a schematic side view of another conveyor installation of the invention for use in downhill conveying.
• Fig. 1 shows a conveyor 1 suitable for use in uphill conveying bulk particulate material 2.
• the conveyor 1 comprises a carrier belt 3 and a bulk material engagement means 4.
• the carrier belt 3 extends around return pulleys 5 and over guide rollers 6 (See Fig. 3) formed and arranged so as to define a flat-bottomed generally "V"-shaped channel 7 along the conveying path of the conveyor 1.
• the bulk material engagement means 4 comprises a flexible endless connector means member in the form of two chains 8 mounting 9 a .plurality of spaced apart upstanding paddles in the form of generally arcuate plates 10 (See Fig. 4) corresponding generally to the cross-sectional shape of the channel 7 defined by the carrier belt 3 and guide rollers 6 (see Fig. 3) . As may be seen in more detail in Figs.
• the arcuate plates 10 have a central generally upright wall portion 11 (inclined slightly forward in the conveying direction) extending tranversely of the carrier belt and curving round at either side into side walls 12 of reducing depth extending generally in the uphill direction of the conveyor 1, so that the paddle plates 10 form, together with the carrier belt, generally scoop- shaped receptacles 13 for holding and increasing uphill propulsion of the bulk material 2 by reducing escape thereof from the carrier belt 7 during uphill conveying.
• the outer circumferential edge 14 of each plate 10 is provided with a seal element 15 for engagement with the carrier belt 3 further to minimise escape of material 2.
• curved shaped plates 10 also has the further advantage of maximising the strength of the paddles and their impact resistance as well as helping to centralise the bulk material 2 in the carrier belt 3 thereby improving belt tracking.
• wings 10_a At either side of the arcuate plates 10 are provided outwardly projecting wings 10_a which are formed so as to rise up over the inclined sides 3a. of the troughed carrier belt before depending downwardly to the chain mountings 9 at a level generally alongside the lower edge lla ⁇ of the central portion 11 of the paddle plate 10.
• the bulk material engagement means 4 extends around return guides above the conveying path which are in the form of sprockets 16, at least one of which can be used for driving or braking thereof during uphill or downhill conveying, respectively.
• the chains 8 may be supported between the return sprockets 16 on suitable support sprockets or rollers 17 as shown under the return run. Conveniently though in their conveying run the chains 8 are supported substantially solely through the paddles 10 resting on the carrier belt 3 thereby also maximising frictional engagement therewith and hence drive transmission thereto or therefrom.
• the carrier belt 3 is returned 5 below the conveying path, the belt 3 being supported in the form of a shallow flat bottomed "V"-shaped channel 7 along the return path on the guide rollers 6. It will be appreciated that with a substantially plain belt configuration as shown there will be little danger of material 2 lodging in or adhering to the belt and any cleaning that may be required can be readily effected.
• the bulk material engagement means 4 and carrier belt 3 5 are mounted on a generally conventioned form of structural framework support 18 (as shown schematically in Fig. 5) , the conveyor 1 being provided adjacent its lower end 19 with a loading chute 20 and at its upper end 21 a discharge hopper 22 disposed for receiving material 2 discharged 10 from the conveyor 1.
• Fig. 5 shows a modified conveyor arrangement 23 wherein the conveying path is generally 'S 1 -shaped with the interengaging runs 24, 25 of the carrier belt 3 and material engagement means 4, respectively, having concave ⁇ 15 and convex portions 26, 27 at the lower and upper end portions 28, 29, respectively, of the conveying path.
• the carrier belt 3 has, moreover, extended horizontal sections where assistance from the paddles is not required, continuing beyond the upper and lower ends 30, 31 of
• this embodiment also illustrates how uphill or, as in this particular case as indicated by the arrows 32, downhill conveying can be effectively integrated into extended distance conveying between different levels, without the need for a number
• the bulk material engagement means 4 is driven with its paddles 10 projecting into the channel 7 defined by the carrier 30 belt 3 in frictional engagement with the carrier belt 3 so as to entrain particulate material 2 within said channel 7 at the same time pulling along the carrier belt 3.
• a separate friction drive for the carrier belt 3 may be dispensed with and drive efficiency maximised by use of a positive drive connection through a suitable sprocket engaging with the chain 8.
• the chains 8 of the bulk material engagement means 4 generally in register with the base 30 of the trough 7 defined by the carrier belt 3 along the main part of the conveying path along which the material engagement means 4 interengages the belt 3, in the vertical plan i.e.
• the paddles 10 may be disposed at a relatively close spacing along the chains 8 thereby further maximising the effective material conveying capacity of the conveyor which is already quite favourable due to the shape of the paddles used.
• the carrier belt 3 flattens out as it approaches the return pulleys 5, the belt guide rollers 5 being suitably configured thereat.
• the conveyor includes extended horizontal carrier belt runs 35, it will be appreciated that the carrier belt 3 may have a more flattened configuration than in the inclined run sections.
• the paddles 10 are provided with deflectable and/or resiliently deformable panels 33 at their central upper edges 34.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Structure Of Belt Conveyors (AREA)
• Screw Conveyors (AREA)
• Liquid Crystal (AREA)
• Formation And Processing Of Food Products (AREA)
• Pusher Or Impeller Conveyors (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=10651467

Family Applications (1)

Country Status (10)

Families Citing this family (8)

Family Cites Families (3)

• 1989
  • 1989-02-10 GB GB898903015A patent/GB8903015D0/en active Pending
• 1990
  • 1990-02-01 CA CA002046655A patent/CA2046655A1/en not_active Abandoned
  • 1990-02-01 JP JP2503346A patent/JPH04506501A/ja active Pending
  • 1990-02-01 EP EP90903192A patent/EP0456744A1/de not_active Withdrawn
  • 1990-02-01 AU AU50801/90A patent/AU635524B2/en not_active Ceased
  • 1990-02-01 BR BR909007114A patent/BR9007114A/pt unknown
  • 1990-02-01 WO PCT/GB1990/000149 patent/WO1990009333A1/en not_active Application Discontinuation
  • 1990-02-01 ZA ZA90781A patent/ZA90781B/xx unknown
  • 1990-02-09 IN IN106MA1990 patent/IN175170B/en unknown
  • 1990-02-09 CN CN90100579A patent/CN1021647C/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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