EP0404273A1 - Vessel with unloading device - Google Patents

Vessel with unloading device Download PDF

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Publication number
EP0404273A1
EP0404273A1 EP90201693A EP90201693A EP0404273A1 EP 0404273 A1 EP0404273 A1 EP 0404273A1 EP 90201693 A EP90201693 A EP 90201693A EP 90201693 A EP90201693 A EP 90201693A EP 0404273 A1 EP0404273 A1 EP 0404273A1
Authority
EP
European Patent Office
Prior art keywords
grab
hold
vessel
chassis
hoisting
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.)
Granted
Application number
EP90201693A
Other languages
German (de)
French (fr)
Other versions
EP0404273B1 (en
Inventor
Gerrit Jan Tillema
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.)
Nagron Mechanical Handling BV
Original Assignee
NAGRON HANDLING ENGINEERS BV
NAGRON HANDLING ENGINEERS BV
Nagron Mechanical Handling BV
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 NAGRON HANDLING ENGINEERS BV, NAGRON HANDLING ENGINEERS BV, Nagron Mechanical Handling BV filed Critical NAGRON HANDLING ENGINEERS BV
Publication of EP0404273A1 publication Critical patent/EP0404273A1/en
Application granted granted Critical
Publication of EP0404273B1 publication Critical patent/EP0404273B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/22—Arrangement of ship-based loading or unloading equipment for cargo or passengers of conveyers, e.g. of endless-belt or screw-type

Definitions

  • the invention relates to a vessel comprising a hold for bulk material and an unloading device.
  • the invention provides a vessel of the type mentioned in the preamble which has the feature that the unloading device comprises a chassis movable in lengthwise direction of the hold and guided by means of rails, which chassis bears via hoisting means a grab which has a length which is greater than half the breadth of the hold.
  • the cargo can be removed per layer in parallel bites.
  • the following layer presents itself as uniform, parallel transverse waves which allow of easy taking up by the grab. This manner of unloading furthermore lends itself well to an automatic process because of the regular presenta­tion of material.
  • the invention also relates to and provides a method as formulated in claim 8.
  • the vessel 1 comprises a hold 2 for receiving bulk material 3, in particular gravel, although sand, coal, grain and other bulk materials are also conceivable.
  • the vessel 1 has an unloading device 4 comprising a chassis 5 which is guided along rails 6 in lengthwise direction of the hold 2.
  • the wheels 7 are driven by electromotors or hydromotors (not drawn).
  • a hoisting frame 8 is connected pivotally to the chassis 5 about a horizontal axis 9 and is swivelled with hydraulic cylinders 10 between a grabbing position drawn in fig. 3 with full lines and a release position drawn in fig. 3 with dashed lines.
  • the grab 15 has a length k which is greater than half the breadth 1/2 b of the hold 2.
  • k is greater than 1/2 b , preferably greater than 3/4 b and for example at least 6/7 b .
  • the grab 15 is located above receiving means 16 arranged on the chassis 5 consisting of an elongate trough 17 positioned transversely to the hold 2 which debouches onto a cross conveyor 18 which discharges the material via a discharge chute 19 onto a lengthwise con­veyor 20 disposed alongside the hold.
  • this discharge conveyor 21 is swivelled on board about a shaft 23 into the position drawn in fig. 1 with dashed lines and then rests on a support 24.
  • An upper beam 25 of the grab 15 bears a number of ultrasonic pick-ups 26 which signal when the distance of the opened grab 15 to the material 3 has reached a certain minimum distance.
  • the grab 15 is suspended on four cables 14 arranged at a considerable mutual distance the grab 15 remains properly positioned in transverse direction of the hold 2.
  • the material 3 is picked up from the hold 2 in layers wherein an elongate bite 28 extending in a transverse direction is picked up each time, which bite has a part cylin­der-shaped bottom surface 29 and two part cylinder-shaped upper surfaces 30.
  • the grab 15 has a well-presented bite to handle with each following layer because the chassis 5, and therewith the biting grab 15, is disposed each time staggered a half bite 28 relative to the previous layer.
  • the unloading method controlled by a computer, is carried out automatical­ly.
  • the chassis 5 is hereby displaced each time a bite breadth c after each bite 28 and in each case only one bite 28 is taken up and unloaded above the receiving means 16. After taking the bite 28, during the raising thereof and during the swivelling of the hoisting frame 8, the chassis 8 is already being moved a step in the length of the bite bread­th c so that the opened grab 15 immediately comes to lie at the correct position for the following bite 28.
  • the reciprocal swivelling of the hoisting frame 8 also takes place automatically. Paying out of the closing and hoisting cables is stopped at the correct moment by the ultra­sonic pick-ups 26. The end of the layer is signalled by limit switches (not drawn) on the chassis when the head end walls 38 of the hold 2 are approached.
  • the chassis 5 is displaced a half bite breadth c back at the first bite 28 from a following layer.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Refuse Receptacles (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Loading Or Unloading Of Vehicles (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

A vessel can be unloaded rapidly and automatically with a long grab (15) which is displaced systematically in length­wise direction in a position directed transversely of the hold, and which length (k) is greater than half the breadth (b) of the hold.

Description

  • The invention relates to a vessel comprising a hold for bulk material and an unloading device.
  • With vessels it is important that they are unloaded as quickly as possible. To this end the invention provides a vessel of the type mentioned in the preamble which has the feature that the unloading device comprises a chassis movable in lengthwise direction of the hold and guided by means of rails, which chassis bears via hoisting means a grab which has a length which is greater than half the breadth of the hold.
  • The cargo can be removed per layer in parallel bites. The following layer then presents itself as uniform, parallel transverse waves which allow of easy taking up by the grab. This manner of unloading furthermore lends itself well to an automatic process because of the regular presenta­tion of material.
  • The invention also relates to and provides a method as formulated in claim 8.
  • Mentioned and other features of the invention will be elucidated in the description following hereinafter with reference to a drawing, in which:
    • fig. 1 shows a perspective view of a preferred embodiment of a vessel according to the invention;
    • fig. 2 shows on a larger scale portion II from fig. 1;
    • fig. 3 shows on a larger scale portion III from fig. 2; and
    • fig. 4 shows on a larger scale portion IV from fig. 2.
  • The vessel 1 comprises a hold 2 for receiving bulk material 3, in particular gravel, although sand, coal, grain and other bulk materials are also conceivable. The vessel 1 has an unloading device 4 comprising a chassis 5 which is guided along rails 6 in lengthwise direction of the hold 2. The wheels 7 are driven by electromotors or hydromotors (not drawn). A hoisting frame 8 is connected pivotally to the chassis 5 about a horizontal axis 9 and is swivelled with hydraulic cylinders 10 between a grabbing position drawn in fig. 3 with full lines and a release position drawn in fig. 3 with dashed lines.
  • In the grabbing position the winches 11 and 12 of respectively the closing cables 13 and the hoisting cables 14 suspended at the upper end of the hoisting frame are located at the side of the chassis 5 so that the grab 15 suspended thereon can be lowered into the hold 2. The grab 15 has a length k which is greater than half the breadth 1/2 b of the hold 2. Example: b = 7m and k = 6m. In any case k is greater than 1/2 b, preferably greater than 3/4 b and for example at least 6/7 b.
  • In the release position the grab 15 is located above receiving means 16 arranged on the chassis 5 consisting of an elongate trough 17 positioned transversely to the hold 2 which debouches onto a cross conveyor 18 which discharges the material via a discharge chute 19 onto a lengthwise con­veyor 20 disposed alongside the hold. This pours the material via a discharge chute 22 onto an outboard transporting dis­charge conveyor 21 for carrying the material ashore. During passage this discharge conveyor 21 is swivelled on board about a shaft 23 into the position drawn in fig. 1 with dashed lines and then rests on a support 24.
  • An upper beam 25 of the grab 15 bears a number of ultrasonic pick-ups 26 which signal when the distance of the opened grab 15 to the material 3 has reached a certain minimum distance.
  • Because the grab 15 is suspended on four cables 14 arranged at a considerable mutual distance the grab 15 remains properly positioned in transverse direction of the hold 2.
  • The material 3 is picked up from the hold 2 in layers wherein an elongate bite 28 extending in a transverse direction is picked up each time, which bite has a part cylin­der-shaped bottom surface 29 and two part cylinder-shaped upper surfaces 30. The grab 15 has a well-presented bite to handle with each following layer because the chassis 5, and therewith the biting grab 15, is disposed each time staggered a half bite 28 relative to the previous layer. The unloading method, controlled by a computer, is carried out automatical­ly.
  • The chassis 5 is hereby displaced each time a bite breadth c after each bite 28 and in each case only one bite 28 is taken up and unloaded above the receiving means 16. After taking the bite 28, during the raising thereof and during the swivelling of the hoisting frame 8, the chassis 8 is already being moved a step in the length of the bite bread­th c so that the opened grab 15 immediately comes to lie at the correct position for the following bite 28.
  • The reciprocal swivelling of the hoisting frame 8 also takes place automatically. Paying out of the closing and hoisting cables is stopped at the correct moment by the ultra­sonic pick-ups 26. The end of the layer is signalled by limit switches (not drawn) on the chassis when the head end walls 38 of the hold 2 are approached.
  • At the end of a layer the chassis 5 is displaced a half bite breadth c back at the first bite 28 from a following layer.

Claims (10)

1. Vessel (1), comprising a hold (2) for bulk material (3) and an unloading device (4), characterized in that the unloading device (4) comprises a chassis (5) dis­placeable in lengthwise direction of the hold (2) and guided by means of rails (6), which chassis via hoisting means (11, 12, 13, 14) bears a grab (15) which has a length (k) which is greater than half the breadth (b) of the hold (2).
2. Vessel (1) as claimed in claim 1, characterized in that the grab (15) is suspended on a hoisting frame (8) which is connected to the chassis (5) for pivoting about a horizontal axis (9) and can be swivelled between a grabbing position wherein the grab (15) can be lowered at the side of the chassis (5) into the hold (2) and a release position wherein the grab (15) is located above receiving means (16) arranged on the chassis (5).
3. Vessel (1) as claimed in claim 1 or 2, charac­terized in that the grab (15) is suspended on a hoisting frame (8) by means of at least two hoisting cables (14) dis­posed at a considerable mutual distance in lengthwise direc­tion of the grab (15) and at least two closing cables (13).
4. Vessel (1) as claimed in any of the foregoing claims, characterized in that the grab frame (25) is provided with at least one ultrasonic material pick-up (26) for deter­mining the distance of the grab (15) to the material (3) present in the hold (2).
5. Vessel (1) as claimed in any of the foregoing claims, characterized in that the collecting means (16) com­prise a cross conveyor (18) which transports material (3) onto a lengthwise conveyor (20) arranged at the side of the vessel (1) and that the lengthwise conveyor (20) discharges the material (3) onto a discharge conveyor (21) to be carried outboard.
6. Vessel (1) as claimed in any of the foregoing claims, characterized by a computer which controls the unload­ing process, in particular the step-wise movement of the chassis (5), the swivelling movement of the hoisting frame (8), the descending and lifting movement of the grab (15) and the opening and closing movement of the grab (15).
7. Vessel (1) as claimed in any of the foregoing claims, characterized in that the winches (11, 12) of the hoisting and closing cables (13, 14) and/or the wheels of the chassis (5) are driven by electro- or hydromotors.
8. Method for unloading the hold (2), characterized in that the material (3) is removed in layers in parallel transverse bites (28) of a length (k) which is greater than half the breadth (b) of the hold (2).
9. Method as claimed in claim 8, characterized in that the unloading takes place automatically controlled.
10. Method as claimed in claim 8 or 9, characterized in that the hold (2) is emptied with a grab (15) the length (k) whereof is greater than 3/4 of the breadth (b) of the hold.
EP90201693A 1989-07-03 1990-06-26 Vessel with unloading device Expired EP0404273B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL8901691A NL8901691A (en) 1989-07-03 1989-07-03 VESSEL WITH UNLOADING EQUIPMENT.
NL8901691 1989-07-03
SG28894A SG28894G (en) 1989-07-03 1994-02-23 Vessel with unloading device

Publications (2)

Publication Number Publication Date
EP0404273A1 true EP0404273A1 (en) 1990-12-27
EP0404273B1 EP0404273B1 (en) 1992-11-11

Family

ID=26646550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90201693A Expired EP0404273B1 (en) 1989-07-03 1990-06-26 Vessel with unloading device

Country Status (7)

Country Link
EP (1) EP0404273B1 (en)
DE (1) DE69000455T2 (en)
DK (1) DK0404273T3 (en)
ES (1) ES2035700T3 (en)
HK (1) HK35994A (en)
NL (1) NL8901691A (en)
SG (1) SG28894G (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05331875A (en) * 1992-05-29 1993-12-14 Komatsu Doretsuji Syst Kk Unloading device of ship's hold
US5507381A (en) * 1992-09-23 1996-04-16 Nagron Mechanical Handling B.V. Method for unloading a space and device for performing this method
EP2184408A1 (en) * 2008-11-06 2010-05-12 Spauwer Dredging BV Suction dredger
CN116281267A (en) * 2023-01-20 2023-06-23 山东开元重型机械有限公司 Two-way grab ship unloader
CN117698929A (en) * 2024-02-05 2024-03-15 安徽建筑大学 Transportation ship with hoisting function

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190919425A (en) * 1909-08-24 1910-08-18 James Edwin Richards A New or Improved Loading and Un-loading Device for Ships and the like.
US3362546A (en) * 1965-11-24 1968-01-09 Atkinson Guy F Co Barge unloading device
DE2144865A1 (en) * 1971-09-08 1973-03-15 Krupp Gmbh BULK GOODS SHIP WITH AN UNLOADING DEVICE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190919425A (en) * 1909-08-24 1910-08-18 James Edwin Richards A New or Improved Loading and Un-loading Device for Ships and the like.
US3362546A (en) * 1965-11-24 1968-01-09 Atkinson Guy F Co Barge unloading device
DE2144865A1 (en) * 1971-09-08 1973-03-15 Krupp Gmbh BULK GOODS SHIP WITH AN UNLOADING DEVICE

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05331875A (en) * 1992-05-29 1993-12-14 Komatsu Doretsuji Syst Kk Unloading device of ship's hold
US5507381A (en) * 1992-09-23 1996-04-16 Nagron Mechanical Handling B.V. Method for unloading a space and device for performing this method
EP2184408A1 (en) * 2008-11-06 2010-05-12 Spauwer Dredging BV Suction dredger
EP2184407A1 (en) * 2008-11-06 2010-05-12 Spauwer Dredging BV Suction Dredger
CN116281267A (en) * 2023-01-20 2023-06-23 山东开元重型机械有限公司 Two-way grab ship unloader
CN116281267B (en) * 2023-01-20 2023-12-05 山东开元重型机械有限公司 Two-way bucket wheel ship unloader
CN117698929A (en) * 2024-02-05 2024-03-15 安徽建筑大学 Transportation ship with hoisting function
CN117698929B (en) * 2024-02-05 2024-04-19 安徽建筑大学 A transport ship with lifting function

Also Published As

Publication number Publication date
SG28894G (en) 1994-11-25
DE69000455D1 (en) 1992-12-17
HK35994A (en) 1994-04-22
ES2035700T3 (en) 1993-04-16
EP0404273B1 (en) 1992-11-11
NL8901691A (en) 1991-02-01
DK0404273T3 (en) 1993-01-25
DE69000455T2 (en) 1993-06-09

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