EP0292290A1 - Improvements in cranes - Google Patents

Improvements in cranes Download PDF

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Publication number
EP0292290A1
EP0292290A1 EP88304550A EP88304550A EP0292290A1 EP 0292290 A1 EP0292290 A1 EP 0292290A1 EP 88304550 A EP88304550 A EP 88304550A EP 88304550 A EP88304550 A EP 88304550A EP 0292290 A1 EP0292290 A1 EP 0292290A1
Authority
EP
European Patent Office
Prior art keywords
shearleg
deck
vessel
crane
mounting
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.)
Withdrawn
Application number
EP88304550A
Other languages
German (de)
English (en)
French (fr)
Inventor
Anton Coppens
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.)
HEEREMA ENGINEERING SERVICE BV
Original Assignee
HEEREMA ENGINEERING SERVICE 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 HEEREMA ENGINEERING SERVICE BV filed Critical HEEREMA ENGINEERING SERVICE BV
Publication of EP0292290A1 publication Critical patent/EP0292290A1/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/52Floating cranes

Definitions

  • This invention relates to cranes and in particular, shearleg cranes.
  • the invention also provides a vessel incorporating a crane as defined above and a method of shifting a load using said crane or said vessel.
  • FIG. 1 a vessel 10 incorporating shearleg cranes 14 according to the invention.
  • the vessel 10 is a deck load barge, ie it is purpose built to be able to support and carry on its deck large modules such as offshore platforms or decks.
  • the vessel 10 is seen here in its transport mode, with a module 11 being supported on sea fastenings 12 on the deck 13 of the vessel.
  • the shearleg cranes 14 seen here on the vessel are in their stowed position on deck. The cranes extend over a distance of at least half the length of the vessel.
  • the shearleg cranes 14 comprise a shear leg 15, which is pivotably mounted at 16 on a carriage 17. In the stowed position shown in Figure 1, the shear leg 15 rests on a cradle 18.
  • the carriage 17 has sets of bogie wheels 19 which are arranged to travel along rails 20 on the deck 13 of the vessel 10. Also arranged to travel along the rails 20 via set of bogie wheels 21, is a further carriage 22.
  • Carriage 22 mounts winches 23 and 24 which are respectively for the module lifting tackle 25 and the shear leg support tackle 26. To prevent the carriage 22 from lifting off the rails 20 in use of the crane, the carriage contains ballast 27. In addition, or alternatively the carriage 22 may have means such as counter bogies to react against the rails. Buffers 28 are provided where the two carriages 17 and 22 meet.
  • the carriages are equipped with suitable means, eg motor drive through rack and pinions, enabling them to be moved along the rails and suitable means, eg brakes, enabling the carriages to be held in position.
  • the carriage drive system has to have sufficient power to enable initial erection of the shearleg and also to enable movement of the crane under load.
  • FIG. 3 shows the module 11 being lifted up off the deck 13 of the vessel 10, under control of winch 23, having been cut away from its sea-fastenings 12.
  • the crane 14 is seen here fully assembled, with strut 30 installed between the two carriages 17 and 22.
  • Figures 7 and 8 illustrate the forces acting on the vessel 10: downward forces Wa, Wb and Wc from the weight of the two carriages 17 and 22, the strut 30 and the module 11 itself. These forces are opposed by the upthrust from the water on the vessel 10 caused by its displacement in the water. These upward forces are denoted by Da, Db and Dc over the areas beneath the carriage 17, the strut 30 and the carriage 22 respectively.
  • the vessel has transferrable ballast 38.
  • the ballast 38 is transferred to the opposite end of the vessel to counterbalance the shift in weight.
  • FIG 9 there is seen a vessel which is very similar to that shown in Figure 1 except here, the shear legs 15′ are rather longer and are stored on somewhat higher cradle 18′.
  • FIG 10 there is seen a further modified version of the vessel seen in Figure 1.
  • the strut 30′ is a fixed, permanent bridge to transfer load between the two carriages 17 and 22.
  • FIG 11 there is seen a detail of one form of carriage drive.
  • Wheels 50 support the carriage 51 on the rails 20, which are provided at approximately the level of the deck 13 of the vessel 10.
  • a rack 52 Positioned between the rails 20 and running parallel with the rails is a rack 52.
  • Pinions 53 are mounted on the carriage 51 to engage the rack 52 and are driven by motors 54.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Ship Loading And Unloading (AREA)
  • Leg Units, Guards, And Driving Tracks Of Cranes (AREA)
  • Control And Safety Of Cranes (AREA)
EP88304550A 1987-05-22 1988-05-19 Improvements in cranes Withdrawn EP0292290A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08712102A GB2204853A (en) 1987-05-22 1987-05-22 Improvements in cranes
GB8712102 1987-05-22

Publications (1)

Publication Number Publication Date
EP0292290A1 true EP0292290A1 (en) 1988-11-23

Family

ID=10617752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88304550A Withdrawn EP0292290A1 (en) 1987-05-22 1988-05-19 Improvements in cranes

Country Status (5)

Country Link
EP (1) EP0292290A1 (da)
DK (1) DK277288A (da)
FI (1) FI882408A (da)
GB (1) GB2204853A (da)
NO (1) NO882209L (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019241125A1 (en) * 2018-06-15 2019-12-19 National Oilwell Varco, L.P. Crane skidding system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191320507A (en) * 1912-09-14 1914-01-22 Richard Kimmel Improvements relating to Rotary Cranes.
GB383730A (en) * 1931-10-28 1932-11-24 Pierre Jean Marchaut Improvements in or relating to derricks or like hoisting apparatus
DE1962895A1 (de) * 1969-11-11 1971-05-19 Kone Osakeyhtioe Fa Schiffskran
FR2322817A1 (fr) * 1975-09-05 1977-04-01 Howaldtswerke Deutsche Werft Grue flottante avec une fleche principale susceptible d'etre deposee sur le pont
GB2151580A (en) * 1983-12-27 1985-07-24 Cdf Ss A self-propelled lifting device
GB2196603A (en) * 1986-09-26 1988-05-05 Heerema Engineering Movable sheerleg structure and operation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191320507A (en) * 1912-09-14 1914-01-22 Richard Kimmel Improvements relating to Rotary Cranes.
GB383730A (en) * 1931-10-28 1932-11-24 Pierre Jean Marchaut Improvements in or relating to derricks or like hoisting apparatus
DE1962895A1 (de) * 1969-11-11 1971-05-19 Kone Osakeyhtioe Fa Schiffskran
FR2322817A1 (fr) * 1975-09-05 1977-04-01 Howaldtswerke Deutsche Werft Grue flottante avec une fleche principale susceptible d'etre deposee sur le pont
GB2151580A (en) * 1983-12-27 1985-07-24 Cdf Ss A self-propelled lifting device
GB2196603A (en) * 1986-09-26 1988-05-05 Heerema Engineering Movable sheerleg structure and operation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SHIPPING WORLD & SHIPBUILDER, vol. 167, no. 3897, September 1974, pages 949-950; "'MUSASHI' The world's largest floating crane" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019241125A1 (en) * 2018-06-15 2019-12-19 National Oilwell Varco, L.P. Crane skidding system

Also Published As

Publication number Publication date
GB8712102D0 (en) 1987-06-24
DK277288D0 (da) 1988-05-20
GB2204853A (en) 1988-11-23
NO882209D0 (no) 1988-05-20
NO882209L (no) 1988-11-23
FI882408A0 (fi) 1988-05-20
FI882408A (fi) 1988-11-23
DK277288A (da) 1988-11-23

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