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WO1992005094A1 - Systeme de convoyeur a bande - Google Patents

Systeme de convoyeur a bande Download PDF

Info

Publication number
WO1992005094A1
WO1992005094A1 PCT/AU1991/000348 AU9100348W WO9205094A1 WO 1992005094 A1 WO1992005094 A1 WO 1992005094A1 AU 9100348 W AU9100348 W AU 9100348W WO 9205094 A1 WO9205094 A1 WO 9205094A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt
run
load
underbelt
sticky
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU1991/000348
Other languages
English (en)
Inventor
Barry Barnett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Barnett Investments Pty Ltd
Original Assignee
Barnett Investments Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Barnett Investments Pty Ltd filed Critical Barnett Investments Pty Ltd
Publication of WO1992005094A1 publication Critical patent/WO1992005094A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/04—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration the load being carried on the lower run of the endless surface
    • 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
    • B65G45/00—Lubricating, cleaning, or clearing devices
    • B65G45/10—Cleaning devices
    • B65G45/26—Cleaning devices for gathering residue after cleaning
    • 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

Definitions

  • the present invention relates to conveyor belts and particularly to conveyor belts used in the mining industry and other areas for conveying sticky particulate matter.
  • Conventional conveyor belt systems when used for conveying sticky material such as coal dug from a coal face of a mine, have a tail pulley at the end adjacent the site on the upperbelt run where material is loaded, a discharge pulley at the other end, and a drive pulley arrangement downstream thereof on the underbelt run.
  • a scraper abuts against the downward side of the belt that turns about the discharge pulley so as to remove onto the second belt any sticky material that has not fallen under gravity.
  • the scraper may not remove all the sticky material due to damage of the scraper or belt or some sticky material being resistant to the action of the scraper. This remnant sticky material may, when it dries or is shaken, subsequently fall from the downwardly facing dirty surface cf the return underbelt run on its way to the tail pulley. This leads to dangerous accumulation of coal and other debris on the floor of the mine as well as wastage of product.
  • the present invention seeks to overcome the same problem by loading the material to be conveyed onto the underbelt run rather than the upperbelt run and configuring the conveyor belt in such a way that the dirty surface of the belt, when facing downwardly, always has a belt of the same system underneath it, so that falling debris will land onto the underbelt run, rather than the floor.
  • the debris may then proceed to the unloading site where the debris may fall under gravity onto the second conveyor belt or, if required, may be subjected to the scraper a second time.
  • a conveyor belt system comprising endless belt means mounted and driven on a plurality of pulley means, the belt means having an upperbelt run and an underbelt run, the underbelt run being at all times beneath the upperbelt run, said belt means being adapted to receive sticky particulate load at a first location on the upper surface of the underbelt run, means for removing a substantial portion of the sticky load at a second location on the underbelt run but which may leave a small remnant portion of the sticky load thereon, wherein the configuration of the belt means is such that the surface of the belt upon which remnant sticky load is conveyed is either facing upwardly or when facing downwardly has an underlying portion of the belt means to capture any of the remnant sticky load that detaches from the downwardly facing belt means.
  • the term "sticky particulate load” is defined as any load that has a quality whereby it may stick or adhere to the surface of the belt upon which it is conveyed and "remnant portion of the sticky load” is defined as the carry-back material of the load.
  • the above conveyor belt system is adapted for use in an underground mine to convey coal from the coal face at the end of a first gallery to a second conveyor belt system that is disposed along a second gallery of the mine.
  • the conveyor belt system of the invention may also be adapted for use in other mining operations such as open cut or surface mining of coal, mineral ores and like materials, which are prone to sticking to the belts normally used to coney them.
  • the invention may be applied in the mining of iron ore, bauxite and diamond bearing materials.
  • the conveyor belt system of the invention may be used in washeries, such as in uranium enrichment plants, or in any material handling environment that requires the bulk conveying of sticky material .
  • the means for removing a substantial portion of the sticky load is a 180° downward turn of the underbelt run around a first turn or discharge drive pulley, whereby a substantial portion of the sticky load falls from the belt under gravity.
  • the means for removing a substantial portion of the sticky load includes at least one belt scraper adapted to scrape off sticky load that has not fallen under gravity, the said scraper acting against the underbelt run as it rounds the first turn or discharge drive pulley.
  • the scraper is any form of "soft" acting scraper which is known in the art.
  • a “soft” acting scraper is defined as any scraper that has a scraper tip made of "soft” or flexible material such as rubber or wire, which material can readily flex or be urged away from a heavy or otherwise immoveable or sticky load, rather than urge against such a load and risk damage to the belt or scraper.
  • the "soft” acting scraper should, however, be able to remove lightly adherent load.
  • the “soft” acting scraper is distinct from conventional "hard” acting scrapers, such as those having tungsten carbide or high abrasian resistant ceramic tips, which may be damaged or cause damage to the belt when they urge against heavy or otherwise immoveable or sticky load.
  • the load that is removed from the underbelt run is preferably captured by a chute that feeds the load onto the belt of a second conveyor belt system that transfers it elsewhere along the mine.
  • Fig. 1 is a schematic representation of a conventional underground trunk conveyor belt system
  • Fig. 2 is a schematic representation of a conveyor belt system according to a preferred embodiment of the present invention applied to an underground trunk conveyor belt system
  • Fig. 3 is a schematic side view of a "soft" acting scraper acting against the first turn or discharge drive pulley of the conveyor belt system of Fig. 2.
  • the conventional underground trunk conveyor belt system shown in Fig. 1 may be used to convey coal 11 from the coal face 12 at the end of a first gallery 13 along a portion of an upperbelt run 13a to a second conveyor 14 (shown in cross- section) that conveys the coal 11 along a second gallery (not shown) of a mine. Most of the coal that reaches the end of the upperbelt run 13a falls therefrom under gravity as the belt rounds the discharge pulley 16. Although not shown, there is an impact plate and or a rock box located so as to deflect a substantial amount of the load downwardly onto a chute 22 feeding onto the belt 14 of a second conveyor system.
  • a scraper 15 abuts against the belt surface as it rounds the discharge pulley 16 and scrapes off onto the belt of the second conveyor 14 a substantial amount of the coal 11 that has not fallen under gravity.
  • Two drive pulleys 17 and 18 support a portion of the underbelt run 19 in an S-like turn configuration.
  • a tensioning device 20 acting on a portion of the underbelt run 19 turning about a freely rotating idler pulley 21 serves to ensure that the belt is maintained at a predetermined tension.
  • the tensioning device 20 may be in the form of an electrohydraulic winch or a gravity weight.
  • Fig. 2 overcomes this problem by being adapted to load coal 11 at a site on the underbelt run 25 and to convey the load along the underbelt run 25 toward a discharge drive pulley 27.
  • a "soft" acting scraper 26 acts on the discharge drive pulley 27.
  • the scraper 26 is described later with reference to Fig. 3.
  • the conveyor belt system of Fig. 2 also has a tensioning device 33, a second drive pulley 29 and a series of freely turning idler pulleys 30 to complete an endless- track.
  • Remnant sticky coal 32 is conveyed by the underbelt run about the second drive pulley 29 so as to complete an S-like turn configuration and to orientate the load carrying surface of the underbelt run back in an upwardly facing direction.
  • the belt then turns about the series of freely turning idler pulleys 30, until the belt returns to the load site, and during this time the sticky remnant coal faces downwardly.
  • the load carrying surface of the belt is only either facing upwardly or, when facing downwardly, has an underlying portion of the belt to capture any remnant load that detaches from the downwardly facing belt.
  • the scraper arm need not be made of heavy duty material or have a tungsten carbide tip as is conventionally used to withstand large load obstructions, but may be any "soft" acting scraper.
  • the reason for this is that it is not as important in the present invention to remove sticky load out of concern that this will fall to the floor of the mine. A larger than normal amount of sticky load can be allowed to pass around the discharge pulley and so face downwardly, because of the presence of an underlying portion of the belt of the same system that can capture any falling load.
  • only one "soft” acting scraper may be sufficient for use in certain circumstances rather than the several "hard” acting scrapers that are conventionally used. This will reduce belt wear and so lead to longer belt life.
  • the "soft" acting scraper 26 of Fig. 3 has an arm 35 pivotable about axis 36. As shown, the lower end of arm 35 has a weight 37 attached thereto and the higher end of arm 35 has a U-shaped member 38 attached thereto. The U-shaped member 38 has a rubber strip 39 bolted therewithin. The scraper 26 extends across the width of the belt 25.
  • the rubber strip 39 of the scraper 26 abuts as shown against the belt 25 as it turns around the pulley 27 by the presence of the weight 37 acting at the lower end of the pivotal arm 35.
  • the rubber strip 39 collides with load travelling on the belt 25, it will remove only that portion of the load equivalent to the removal capacity of the scraper 26, but will allow more sticky load to remain on the belt 25 by being deflected about pivot axis 36 away from the belt 25.
  • the weight 37 will cause the rubber strip 39 to return and again abut against the belt 25 as shown.
  • the present invention also overcomes a problem in the prior art commonly referred to as "the tail pulley problem", where load spilt from the upperbelt run near the load site lands on the underbelt run adjacent to the tail pulley, thereby accumulating at the tail pulley and causing damage to the belt as it turns about the tail pulley. There is also the added risk of the belt tracking off the side of the tail pulley.
  • the present invention can be seen as a “self cleaning" system whereby any remnant material falling from the underside of the upperbelt run will fall on the underbelt run that moves away from the tail pulley.
  • the present invention may be adapted for use as an underground longwall conveyor, an open cut surface main conveyor, a stockpile conveyor or any other form of both stationary or moveable coal handling conveyor assembly. It is further apparent that the present invention has broad application wherever sticky particulate material is sought to be conveyed, such as may be required in grain or sugar processing plants.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Belt Conveyors (AREA)

Abstract

Système de convoyeur à bande comportant une bande sans fin (25) entraînée par des poulies (27, 29 et 30). La bande (25) est conçue pour recevoir des charges particulaires adhérentes (11) à un premier point sur la surface supérieure de la bande inférieure et décharger une grande partie de la charge adhérente à un deuxième point (27) situé sur la bande inférieure, de manière à ne laisser qu'une petite partie restante (32) de la charge adhérente sur la bande (25). La bande (25) est configurée de telle sorte que la surface de la bande sur laquelle la partie restante de la charge adhérente (32) est transportée fait face soit vers le haut, soit alors vers le bas, auquel cas la partie de la bande (25) se trouvant en dessous est en mesure de recueillir toute particule de la charge adhérente (32) qui se détacherait de la bande faisant face vers le bas (25).
PCT/AU1991/000348 1990-09-13 1991-08-08 Systeme de convoyeur a bande Ceased WO1992005094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPK229590 1990-09-13
AUPK2295 1990-09-13

Publications (1)

Publication Number Publication Date
WO1992005094A1 true WO1992005094A1 (fr) 1992-04-02

Family

ID=3774953

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1991/000348 Ceased WO1992005094A1 (fr) 1990-09-13 1991-08-08 Systeme de convoyeur a bande

Country Status (1)

Country Link
WO (1) WO1992005094A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017045012A1 (fr) * 2015-09-18 2017-03-23 Craig James Ply Ltd Amélioration apportée à un système de bande transporteuse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1077563A (fr) * 1953-01-28 1954-11-09 Halbach & Braun Saar G M B H Transporteur destiné en particulier à l'exploitation minière
GB2167033A (en) * 1984-11-16 1986-05-21 Hauni Werke Koerber & Co Kg Foraminous belt conveyor
US4787500A (en) * 1986-09-22 1988-11-29 Holz William G Conveyor belt scraper
US4821867A (en) * 1987-04-23 1989-04-18 Veenhof Willem D Controlled deflection of flexible scraper strands
AU2098088A (en) * 1988-04-18 1989-10-19 Nippon Tsusho Kabushiki Kaisha Belt cleaner and its scraper

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1077563A (fr) * 1953-01-28 1954-11-09 Halbach & Braun Saar G M B H Transporteur destiné en particulier à l'exploitation minière
GB2167033A (en) * 1984-11-16 1986-05-21 Hauni Werke Koerber & Co Kg Foraminous belt conveyor
US4787500A (en) * 1986-09-22 1988-11-29 Holz William G Conveyor belt scraper
US4821867A (en) * 1987-04-23 1989-04-18 Veenhof Willem D Controlled deflection of flexible scraper strands
AU2098088A (en) * 1988-04-18 1989-10-19 Nippon Tsusho Kabushiki Kaisha Belt cleaner and its scraper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017045012A1 (fr) * 2015-09-18 2017-03-23 Craig James Ply Ltd Amélioration apportée à un système de bande transporteuse

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