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WO2008124888A1 - Câblage de levage différentiel pour benne traînante - Google Patents

Câblage de levage différentiel pour benne traînante Download PDF

Info

Publication number
WO2008124888A1
WO2008124888A1 PCT/AU2008/000534 AU2008000534W WO2008124888A1 WO 2008124888 A1 WO2008124888 A1 WO 2008124888A1 AU 2008000534 W AU2008000534 W AU 2008000534W WO 2008124888 A1 WO2008124888 A1 WO 2008124888A1
Authority
WO
WIPO (PCT)
Prior art keywords
bucket
dragline
rigging
hoist
hoist rope
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/AU2008/000534
Other languages
English (en)
Inventor
Peter Knights
Paul J. A. Lever
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.)
CMTE Development Ltd
Original Assignee
CMTE Development 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
Priority claimed from AU2007901976A external-priority patent/AU2007901976A0/en
Application filed by CMTE Development Ltd filed Critical CMTE Development Ltd
Publication of WO2008124888A1 publication Critical patent/WO2008124888A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/58—Component parts

Definitions

  • This invention relates to differential hoist dragline rigging and has been devised particularly though not solely for the implementation of differential hoist rigging in draglines with side by side boompoint sheaves.
  • dragline refers to a large electric dragline, typically moveable on walking feet and having a rotatable house based on a turntable platform from which is deployed a long boom.
  • a dragline bucket is suspended from the end of the boom, typically by two hoist ropes and the bucket is moved toward or away from the house by way of a drag rope.
  • Draglines of this type are typically used to remove to overburden in an open cut mining situation and the dragline buckets have a large capacity, in the order of 100 to
  • the present invention therefore provides a dragline bucket rigging configuration utilising independently controllable first and second hoist ropes, including a front rigging arrangement connecting the first hoist rope to the forward end of the bucket, and a pulley mounted on the front rigging arrangement arranged to direct the second hoist rope which passes over the pulley before being connected directly or indirectly to the rear end of the bucket.
  • the front rigging arrangement includes a bridal having two lower ends fastened to the bucket adjacent the forward end of the bucket.
  • the bridal is formed from chain.
  • the bridal is attached to a mount for the pulley over which the second hoist rope is entrained.
  • the distal end of the second hoist rope is connected directly to the rear end of the bucket.
  • the distal end of the second hoist rope is connected to the rear end of the bucket by way of a bridal.
  • the front rigging arrangement is sufficiently long to position the pulley above the rear end of the bucket when the bucket is at or near a vertical altitude in a dumping mode.
  • the front rigging arrangement is connected to the forward end of the bucket at a location substantially vertically above a connection point for a drag rope when the bucket is substantially horizontal in a digging mode.
  • Fig. 1 is a side view of a dragline incorporating a rigging configuration according to the invention
  • Fig. 2 is a side view to an enlarged scale of the bucket and associated bucket rigging of the dragline shown in Fig 1 ;
  • Fig. 3 is a front view of the dragline bucket shown in Fig. 2;
  • Fig. 4 is a side view similar to Fig. 2 showing the dragline bucket inclined in a typical "carry" configuration.
  • Fig. 5 is a similar view to Fig. 2 showing the bucket in a dumping position
  • Fig. 6 is a side view of the dragline bucket incorporating a force diagram for forces acting on the pulley.
  • a large electric dragline 1 typically supported on, and moveable by way of, walking feet 2 has a rotatable house 3 mounted on a turntable 4.
  • a dragline boom 5 typically supported by cables 6 engaged over struts 7 in order to support the boom.
  • the dragline has a bucket 8 suspended from hoist ropes 9 and 10 which are entrained over a pair of side by side boompoint sheaves 1 1 mounted at the distal end 12 of the boom 5.
  • the two hoist ropes in turn are lead over portion 13 into the house 3 where each is wound onto an independent hoist drum (not shown).
  • the hoist drums are independently rotatable by drive motors and appropriate gear boxes to enable the two hoist ropes 9 and 10 to be reeled in or paid out together, or to be independently moved to achieve differential hoist rope control in a similar manner to that described in the aforesaid International Patent Application PCT/AUOO/01336, the content of which is incorporated herein by way of cross reference.
  • the lateral position of the bucket 8 is controlled by a drag rope 14 typically terminating in a chain portion 15 connected to the front of the bucket at 16.
  • the drag rope 14 is also lead into the house 4 where it is wound onto a drag rope drum also driven and controlled by an electric motor in the well known manner.
  • Fig. 2 the rigging configuration for the bucket 8 can be more clearly seen as including a pulley or sheave 17 which has a mount supported by the front hoist rope 9.
  • the rear hoist rope 10 is entrained around the pulley 17 so that it is diverted over portion 10a and then secured to the rear of the bucket at point 18 typically by means of a socket and wedge arrangement (not shown).
  • the front hoist rope 9 is connected to the forward end of the bucket at 19 by a front rigging arrangement including a chain bridal 20 which is connected in turn to the mount of the pulley 17.
  • the attitude of the bucket can easily be controlled from, for example, a typical digging attitude at shown in Fig. 2 wherein the teeth 21 at the mouth of the bucket are angled downwardly to engage the overburden, to a carry position typically shown in Fig. 4 where the bucket is tilted rearwardly to retain the maximum payload, by differential movement of the front and rear hoist ropes 9 and 10.
  • the front hoist rope 9 may be held at a constant extension while the rear hoist rope 10 is paid out to lower the rear of the bucket to the position shown in Fig. 4.
  • the overall height of the bucket above the ground is controlled by simultaneous movement of the front and rear hoist ropes 9 and 10 as is well known.
  • the dragline bucket rigging configuration according to the invention has further advantages in that a particularly efficient dumping attitude is able to be obtained as shown in Fig. 5.
  • the bucket is able to be dumped in a near vertical position by providing the bridle chains 20 sufficiently long enough to position the pulley 17 above the bucket 8 as shown in Fig. 5 allowing the bucket to dump in a near vertical position.
  • Shorter chains could be used but have the disadvantage of positioning the pulley within the bucket envelope when forward dumping and trials of this configuration showed that forward dumping ability is compromised as the bucket will at most dump to 45 degrees.
  • the dragline bucket rigging arrangement allows for possible application to rear dumping buckets which would overcome this limitation.
  • a higher breakout force can be applied to the front of the bucket by the front rigging arrangement 20.
  • Fig. 6 is a force diagram for forces acting on the pulley 17.
  • F3 the breakout force applied via front rigging arrangement 20
  • Fl the force applied through the front hoist rope 9.
  • F2 is the force in the rear hoist rope 10.
  • the dragline bucket rigging configuration according to the invention provides an estimated weight reduction in the rigging of approximately 6 tonnes, a load increase in a typical dragline from 90 tonne to 96 tonne i.e. a 6.6% increase and a dig cycle time reduction of 3 seconds over a typical 55 second cycle time. These factors give an overall productivity increase in the region of 10% to 1 1%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

La présente invention concerne une configuration de câblage destinée à une benne traînante (8) et utilisant un premier câble de levage (9) et un deuxième câble de levage (10), commandés indépendamment, et arrivant l'un à l'avant de la benne (19), l'autre à l'arrière de la benne (18). Le deuxième câble de levage (10) passe sur une poulie (17) montée entre le premier câble de levage (9) et un guide-câble (20) aboutissant à l'avant de la benne (19). Le déplacement différentiel des deux câbles de levage permet une commande précise de la posture de la benne dans tous les modes de fonctionnement de la benne traînante tout en permettant de faire passer les câbles de levage (9, 10) par les poulies de pointe de flèche placées côte à côte dans une flèche pour pelle à benne traînante de construction conventionnelle.
PCT/AU2008/000534 2007-04-16 2008-04-16 Câblage de levage différentiel pour benne traînante Ceased WO2008124888A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2007901976A AU2007901976A0 (en) 2007-04-16 Differential hoist dragline rigging
AU2007901976 2007-04-16

Publications (1)

Publication Number Publication Date
WO2008124888A1 true WO2008124888A1 (fr) 2008-10-23

Family

ID=39863179

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2008/000534 Ceased WO2008124888A1 (fr) 2007-04-16 2008-04-16 Câblage de levage différentiel pour benne traînante

Country Status (1)

Country Link
WO (1) WO2008124888A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU972008A1 (ru) * 1981-04-09 1982-11-07 Специальное конструкторско-технологическое бюро Института геотехнической механики АН УССР Рабочее оборудование экскаватора-драглайна
SU1694789A1 (ru) * 1989-06-22 1991-11-30 Свердловский горный институт им.В.В.Вахрушева Рабочее оборудование экскаватора-драглайна
WO1993006036A1 (fr) * 1991-09-17 1993-04-01 Bergeron Raymond E Godet mecanique
WO2001032994A1 (fr) * 1999-11-03 2001-05-10 Jeffrey Craig Rowlands Dispositif de commande et de levage du godet racleur d'une pelle mecanique
US20010029686A1 (en) * 2000-04-13 2001-10-18 Leslie Bruce A Drag link bucket controls
US6446366B1 (en) * 2000-11-15 2002-09-10 Esco Corporation Dragline apparatus and bucket

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU972008A1 (ru) * 1981-04-09 1982-11-07 Специальное конструкторско-технологическое бюро Института геотехнической механики АН УССР Рабочее оборудование экскаватора-драглайна
SU1694789A1 (ru) * 1989-06-22 1991-11-30 Свердловский горный институт им.В.В.Вахрушева Рабочее оборудование экскаватора-драглайна
WO1993006036A1 (fr) * 1991-09-17 1993-04-01 Bergeron Raymond E Godet mecanique
WO2001032994A1 (fr) * 1999-11-03 2001-05-10 Jeffrey Craig Rowlands Dispositif de commande et de levage du godet racleur d'une pelle mecanique
US20010029686A1 (en) * 2000-04-13 2001-10-18 Leslie Bruce A Drag link bucket controls
US6446366B1 (en) * 2000-11-15 2002-09-10 Esco Corporation Dragline apparatus and bucket

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 198336, Derwent World Patents Index; Class Q42, AN 1983-757816 *
DATABASE WPI Week 199238, Derwent World Patents Index; Class Q42, AN 1992-313974 *

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