EP3020622B1 - System and lifting unit for lifting loads of varying weight - Google Patents
System and lifting unit for lifting loads of varying weight Download PDFInfo
- Publication number
- EP3020622B1 EP3020622B1 EP14388006.0A EP14388006A EP3020622B1 EP 3020622 B1 EP3020622 B1 EP 3020622B1 EP 14388006 A EP14388006 A EP 14388006A EP 3020622 B1 EP3020622 B1 EP 3020622B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lifting unit
- crane
- wire
- fastening means
- lifting
- 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.)
- Active
Links
- 230000008901 benefit Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes 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
- B66C23/18—Cranes 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
- B66C23/20—Cranes 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 with supporting couples provided by walls of buildings or like structures
- B66C23/207—Cranes 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 with supporting couples provided by walls of buildings or like structures with supporting couples provided by wind turbines
-
- 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
- B63B27/10—Arrangement of ship-based loading or unloading equipment for cargo or passengers of cranes
-
- 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
- B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
- B63B27/32—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using cableways
Definitions
- the present invention relates to cranes with a beam.
- An offshore wind farm usually comprises a cluster of some hundreds wind turbines. The large number is necessary to be able efficiently to transfer the generated electricity from the farm to the shore. It has appeared that a rather intense maintenance of the offshore wind turbines is necessary. Otherwise one or more of the turbines are likely to get broke, which results in the wind farm no longer being able to yield a profitable return on investment. With present wind farms, it has become common practice to visit each turbine once, sometimes twice a month for inspection and preventive maintenance. From time to time periodic actions need to be taken, like changing the oil in the gear box of the electrical generator or replacing some critical moving parts. In the case of defects, repairs need to be carried out.
- the service engineers For this visitation of the turbines, the service engineers, together with their tools and spare parts, are delivered to the turbines by small shuttle vessels.
- the service engineers access the turbine via a latter onto an access platform mounted on the nacelle tower or on the monopile/tripod/jacket foundation.
- one or more cranes/davits are mounted on this access platform.
- Most of the lifts are of loads of less than 1 ton. However, from time to time, heavier loads occur.
- the cranes/davits therefore need to be able to lift loads of more than e.g. 3 tons.
- Such cranes/davits are much more costly than cranes/davits capable of lifting up to e.g. 1 ton, which will increase the costs of the entire project.
- CN201151466 discloses a marine boat raft and landing lifting machine, which comprises a hoisting device, a guide wheel, a boom, a main wire rope, a lowering control wire rope, a lowering control switch, a boat raft and landing winch, a hydraulic assembly, a lifting machine chamber, an operation device, a revolving device and a derricking cylinder.
- One aspect relates to a system for lifting loads of varying weight comprising:
- the system comprises a slightly modified crane/davit, and a lifting unit.
- the lifting unit is constructed to be attached to any crane in the need of performing a high-load lift with few modifications to a normal crane/davit, of course, supported that the crane structure can withstand the higher load.
- the system allows for an easy coupling and uncoupling of the lifting unit.
- the crane/davit comprises a beam, and a winch and wire assembly; and the lifting unit comprises a frame and a winch and wire assembly.
- Either the crane and/or the lifting unit comprises an auxiliary winch and wire assembly for mounting the lifting unit to the crane beam.
- the lifting unit can be moved into place, preferably beneath the crane beam, by attaching the auxiliary wire to the crane and rewinding the auxiliary wire until the correct position of the lifting unit is obtained.
- the lifting unit can be moved into place, preferably beneath the crane beam, by attaching the auxiliary wire to the lifting unit and rewinding the auxiliary wire until the correct position of the lifting unit is obtained.
- Davit cranes are perfect for permanent or portable power. These cranes consist of an angled beam which pivots over a vertical axis. They can have fixed or adjustable booms/beams, and are available in portable as well as stationary units. Davit cranes incorporate a hand operated or electric winch and wire assembly for load handling.
- the crane and/or lifting unit winch and wire assembly is electronic.
- the crane and/or lifting unit winch and wire assembly comprises a motor and/or gear unit.
- the crane and/or lifting unit winch and wire assembly comprises a motor and/or a gear.
- the crane comprises fastening means for releasable attachment of the auxiliary wire.
- the lifting unit comprises fastening means for releasable attachment of the auxiliary wire.
- fastening means for fastening a wire may be used, depending on the type of wire end (e.g. hook or eye) to be fastened/attached.
- auxiliary wire hold the lifting unit and crane beam in position.
- a part of the fastening means may be positioned on the lifting unit, while the rest is positioned on the crane, such as on the crane beam.
- the crane and/or the lifting unit further comprises fastening means for releasable attachment of the lifting unit frame to the crane beam.
- the lifting unit may have to be pivoted into place.
- At least one of the fastening means for releasable attachment of the lifting unit to a crane beam is adapted for pivotable attachment of one end of the lifting unit.
- the lifting unit frame further comprises fastening means for releasable attachment of the crane wire.
- the crane further comprises fastening means for releasable attachment of the lifting unit wire.
- a second aspect relates to lifting unit comprising a frame, a winch and wire assembly, and an auxiliary winch and wire assembly for mounting the lifting unit to a crane beam.
- the lifting unit further comprises fastening means for releasable attachment of the lifting unit to a crane beam.
- At least one of the fastening means for releasable attachment of the lifting unit to a crane beam is adapted for pivotable attachment of one end of the lifting unit.
- the lifting unit further comprises fastening means for releasable attachment of a crane wire.
- Figure 1 shows a lifting unit
- Figure 2 shows the crane onto which the lifting unit is to be connected.
- the lifting unit 300 is shown with a winch and wire assembly mounted on a frame 304.
- the winch and wire assembly comprises a winch 310 and a gear and motor unit 312 to unwind and rewind the lifting unit wire 302. It is an advantage to use the crane wire in the positioning of the lifting unit onto the crane beam.
- the lifting unit 300 is therefore adapted for attachment to a crane wire by fastening means 314.
- An auxiliary winch and wire assembly 306 for mounting the lifting unit to a crane beam is also mounted on the frame 304.
- the lifting unit 300 is adapted for pivotable attachment of one end to a crane beam by fastening means 308A. After attachment of fastening means to the crane beam, fastening means 308B will be drawn into position by the auxiliary winch and wire assembly 306.
- the crane 200 is shown with a crane beam 202. Only the crane wire 204 is shown of the crane winch and wire assembly. Since the auxiliary winch and wire assembly is positioned on the lifting unit, the lifting unit can be moved into place, preferably beneath the crane beam, by attaching the auxiliary wire to the crane and rewinding the auxiliary wire until the correct position of the lifting unit is obtained.
- the auxiliary wire with a wire hook at its end can be attached to fastening means 208, here shown as an eyebolt.
- Fastening means 206A is adapted to engage with fastening means 308A to provide pivotable attachment of one end of the lifting unit with the crane beam.
- the crane wire 204 is attached to the fastening means 314 (lifting eye) on the lifting unit 300.
- the crane wire 204 is partly rewound such that the lifting unit 300 in hanging with fastening means 308A in close proximity to fastening means 206A.
- the lifting unit has been turned 180 degrees, and the auxiliary wire 307 has been attached to fastening means 208.
- the crane wire 204 is rewound such that the fastening means 308A is pivotably engaged with fastening means 206A.
- the auxiliary wire 307 is rewound such that the fastening means 308B is engaged with fastening means 206B, and the lifting unit 300 is in position under the crane beam 202.
- FIGS 7-8 show a system for lifting loads of varying weight in accordance with various embodiments of the invention, where the lifting unit 300 is mounted on a beam 202 that can be luffered up and down.
Description
- The present invention relates to cranes with a beam.
- An offshore wind farm usually comprises a cluster of some hundreds wind turbines. The large number is necessary to be able efficiently to transfer the generated electricity from the farm to the shore. It has appeared that a rather intense maintenance of the offshore wind turbines is necessary. Otherwise one or more of the turbines are likely to get broke, which results in the wind farm no longer being able to yield a profitable return on investment. With present wind farms, it has become common practice to visit each turbine once, sometimes twice a month for inspection and preventive maintenance. From time to time periodic actions need to be taken, like changing the oil in the gear box of the electrical generator or replacing some critical moving parts. In the case of defects, repairs need to be carried out.
For this visitation of the turbines, the service engineers, together with their tools and spare parts, are delivered to the turbines by small shuttle vessels. The service engineers access the turbine via a latter onto an access platform mounted on the nacelle tower or on the monopile/tripod/jacket foundation. In order to board heavy equipment and spare parts, one or more cranes/davits are mounted on this access platform. Most of the lifts are of loads of less than 1 ton. However, from time to time, heavier loads occur. The cranes/davits therefore need to be able to lift loads of more than e.g. 3 tons. Such cranes/davits are much more costly than cranes/davits capable of lifting up to e.g. 1 ton, which will increase the costs of the entire project. -
CN201151466 discloses a marine boat raft and landing lifting machine, which comprises a hoisting device, a guide wheel, a boom, a main wire rope, a lowering control wire rope, a lowering control switch, a boat raft and landing winch, a hydraulic assembly, a lifting machine chamber, an operation device, a revolving device and a derricking cylinder. - It is therefore desirable to provide a solution, which can solve the lifting of the few high duty loads.
- One aspect relates to a system for lifting loads of varying weight comprising:
- a crane, such as a davit, comprising a beam, and a winch and wire assembly; and
- a lifting unit comprising a frame and a winch and wire assembly;
- Disclosed herein is a system for lifting loads of varying weight. The system comprises a slightly modified crane/davit, and a lifting unit. By sharing one or more lifting units with a higher lifting capacity than the cranes within the offshore wind farm, the costs of the entire offshore wind farm will be reduced. The lifting unit is constructed to be attached to any crane in the need of performing a high-load lift with few modifications to a normal crane/davit, of course, supported that the crane structure can withstand the higher load. The system allows for an easy coupling and uncoupling of the lifting unit.
The crane/davit comprises a beam, and a winch and wire assembly; and the lifting unit comprises a frame and a winch and wire assembly. Either the crane and/or the lifting unit comprises an auxiliary winch and wire assembly for mounting the lifting unit to the crane beam.
When the auxiliary winch and wire assembly is positioned on the lifting unit, the lifting unit can be moved into place, preferably beneath the crane beam, by attaching the auxiliary wire to the crane and rewinding the auxiliary wire until the correct position of the lifting unit is obtained.
In the situation where the auxiliary winch and wire assembly is positioned on the crane, the lifting unit can be moved into place, preferably beneath the crane beam, by attaching the auxiliary wire to the lifting unit and rewinding the auxiliary wire until the correct position of the lifting unit is obtained.
Davit cranes are perfect for permanent or portable power. These cranes consist of an angled beam which pivots over a vertical axis. They can have fixed or adjustable booms/beams, and are available in portable as well as stationary units. Davit cranes incorporate a hand operated or electric winch and wire assembly for load handling. - In one or more embodiments, the crane and/or lifting unit winch and wire assembly is electronic.
- In one or more embodiments, the crane and/or lifting unit winch and wire assembly comprises a motor and/or gear unit.
- In one or more embodiments, the crane and/or lifting unit winch and wire assembly comprises a motor and/or a gear.
- In one or more embodiments, wherein when the lifting unit further comprises an auxiliary winch and wire assembly for mounting the lifting unit to the crane beam, the crane comprises fastening means for releasable attachment of the auxiliary wire.
- In one or more embodiments, wherein when the crane further comprises an auxiliary winch and wire assembly for mounting the lifting unit to the crane beam, the lifting unit comprises fastening means for releasable attachment of the auxiliary wire.
- Any type of fastening means for fastening a wire may be used, depending on the type of wire end (e.g. hook or eye) to be fastened/attached.
- It may be an advantage that not only the auxiliary wire hold the lifting unit and crane beam in position. A part of the fastening means may be positioned on the lifting unit, while the rest is positioned on the crane, such as on the crane beam.
- In one or more embodiments, the crane and/or the lifting unit further comprises fastening means for releasable attachment of the lifting unit frame to the crane beam.
- It may be an advantage to first lock/fasten one end of the lifting unit for a more precise positioning of the lifting unit onto the crane beam. In order to do so, the lifting unit will preferably have to be pivoted into place.
- Hence, in one or more embodiments, at least one of the fastening means for releasable attachment of the lifting unit to a crane beam is adapted for pivotable attachment of one end of the lifting unit.
- It may also be an advantage to use the crane wire and/or the lifting unit wire in the positioning of the lifting unit onto the crane beam. This is especially advantageous when first locking/fastening one end of the lifting unit to the crane beam.
- In one or more embodiments, the lifting unit frame further comprises fastening means for releasable attachment of the crane wire.
- In one or more embodiments, the crane further comprises fastening means for releasable attachment of the lifting unit wire.
- A second aspect relates to lifting unit comprising a frame, a winch and wire assembly, and an auxiliary winch and wire assembly for mounting the lifting unit to a crane beam.
- In one or more embodiments, the lifting unit further comprises fastening means for releasable attachment of the lifting unit to a crane beam.
- In one or more embodiments, at least one of the fastening means for releasable attachment of the lifting unit to a crane beam is adapted for pivotable attachment of one end of the lifting unit.
- In one or more embodiments, the lifting unit further comprises fastening means for releasable attachment of a crane wire.
-
-
Figure 1 shows a lifting unit in accordance with various embodiments of the invention; -
Figure 2 shows a crane in accordance with various embodiments of the invention; -
Figures 3-6 show an example of coupling a lifting unit and a crane into a system for lifting loads of varying weight in accordance with various embodiments of the invention; -
Figures 7-8 show a system for lifting loads of varying weight in accordance with various embodiments of the invention, where the crane has a beam that can be luffered up and down. - In the following, the principle of connecting a lifting unit to a crane beam is exemplified.
Figure 1 shows a lifting unit, andFigure 2 shows the crane onto which the lifting unit is to be connected. - Referring to
Figure 1 , thelifting unit 300 is shown with a winch and wire assembly mounted on aframe 304. The winch and wire assembly comprises awinch 310 and a gear andmotor unit 312 to unwind and rewind thelifting unit wire 302.
It is an advantage to use the crane wire in the positioning of the lifting unit onto the crane beam. Thelifting unit 300 is therefore adapted for attachment to a crane wire by fastening means 314.
An auxiliary winch andwire assembly 306 for mounting the lifting unit to a crane beam is also mounted on theframe 304. Thelifting unit 300 is adapted for pivotable attachment of one end to a crane beam by fastening means 308A. After attachment of fastening means to the crane beam, fastening means 308B will be drawn into position by the auxiliary winch andwire assembly 306. - Referring to
Figure 2 , thecrane 200 is shown with acrane beam 202. Only thecrane wire 204 is shown of the crane winch and wire assembly. Since the auxiliary winch and wire assembly is positioned on the lifting unit, the lifting unit can be moved into place, preferably beneath the crane beam, by attaching the auxiliary wire to the crane and rewinding the auxiliary wire until the correct position of the lifting unit is obtained. The auxiliary wire with a wire hook at its end can be attached to fastening means 208, here shown as an eyebolt. Fastening means 206A is adapted to engage with fastening means 308A to provide pivotable attachment of one end of the lifting unit with the crane beam. - In
Figure 3 , thecrane wire 204 is attached to the fastening means 314 (lifting eye) on thelifting unit 300. Thecrane wire 204 is partly rewound such that thelifting unit 300 in hanging with fastening means 308A in close proximity to fastening means 206A. InFigure 4 , the lifting unit has been turned 180 degrees, and theauxiliary wire 307 has been attached to fastening means 208. InFigure 5 , thecrane wire 204 is rewound such that the fastening means 308A is pivotably engaged with fastening means 206A. Finally, inFigure 6 , theauxiliary wire 307 is rewound such that the fastening means 308B is engaged with fastening means 206B, and thelifting unit 300 is in position under thecrane beam 202. -
Figures 7-8 show a system for lifting loads of varying weight in accordance with various embodiments of the invention, where thelifting unit 300 is mounted on abeam 202 that can be luffered up and down. -
- 100
- System for lifting loads of varying weight
- 200
- Crane
- 202
- Crane beam
- 204
- Crane wire
- 206
- Fastening means
- 208
- Fastening means
- 300
- Lifting unit
- 302
- Lifting unit wire
- 304
- Frame
- 306
- Auxiliary winch and wire assembly
- 307
- Auxiliary wire
- 308
- Fastening means
- 310
- Winch
- 312
- Gear and motor unit
- 314
- Fastening means
In the present context, the term "wire" is intended to be understood in the broadest sense, and include cable, wire cable, chain, rope and wire rope.
Claims (11)
- A system (100) for lifting loads of varying weight comprising:- a crane (200), such as a davit, comprising a beam (202), and a winch and wire assembly; and- a lifting unit (300) comprising a frame (304) and a winch and wire assembly; characterized in that either the crane (200) or the lifting unit (300) further comprises an auxiliary winch and wire (307) assembly (306) for mounting the lifting unit (300) to the crane beam (202).
- A system (100) according to claim 1, wherein when the lifting unit (300) comprises said auxiliary winch and wire (307) assembly (306) for mounting the lifting unit (300) to the crane beam (202), and wherein the crane (200) comprises fastening means (208) for releasable attachment of the auxiliary wire (307).
- A system (100) according to claim 1, wherein when the crane (200) comprises said auxiliary winch and wire assembly for mounting the lifting unit (300) to the crane beam (202), the lifting unit (300) comprises fastening means for releasable attachment of the auxiliary wire.
- A system (100) according to any one of the claims 1-3, wherein the crane (200) and/or the lifting unit (300) further comprises fastening means (308A, 308B, 314) for releasable attachment of the lifting unit frame (304) to the crane beam (202).
- A system (100) according to claim 4, wherein at least one of the fastening means (308A, 308B, 314) for releasable attachment of the lifting unit frame (304) to the crane beam (202) is adapted for pivotable attachment of one end of the lifting unit (300).
- A system (100) according to any one of the claims 1-5, wherein the lifting unit frame (304) further comprises fastening means (314) for releasable attachment of the crane wire (204).
- A system (100) according to any one of the claims 1-6, wherein the crane (200) further comprises fastening means for releasable attachment of the lifting unit wire (302).
- A lifting unit (300) comprising a frame (304), a winch and wire assembly, characterized by further comprising an auxiliary winch and wire assembly (306) for mounting the lifting unit (300) to a crane beam (202).
- A lifting unit (300) according to claim 8, further comprising fastening means (308A, 308B) for releasable attachment of the lifting unit (300) to a crane beam (202).
- A lifting unit (300) according to claim 9, wherein at least one of the fastening means (308A) for releasable attachment of the lifting unit (300) to a crane beam (202) is adapted for pivotable attachment of one end of the lifting unit (300).
- A lifting unit (300) according to any one of the claims 8-10, further comprising fastening means (314) for releasable attachment of a crane wire (204).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PT143880060T PT3020622T (en) | 2014-11-11 | 2014-11-11 | System and lifting unit for lifting loads of varying weight |
ES14388006.0T ES2635617T3 (en) | 2014-11-11 | 2014-11-11 | Lifting system and unit for lifting loads of various weights |
DK14388006.0T DK3020622T3 (en) | 2014-11-11 | 2014-11-11 | System for lifting loads of varying weight |
EP14388006.0A EP3020622B1 (en) | 2014-11-11 | 2014-11-11 | System and lifting unit for lifting loads of varying weight |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14388006.0A EP3020622B1 (en) | 2014-11-11 | 2014-11-11 | System and lifting unit for lifting loads of varying weight |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3020622A1 EP3020622A1 (en) | 2016-05-18 |
EP3020622B1 true EP3020622B1 (en) | 2017-06-07 |
Family
ID=51932305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14388006.0A Active EP3020622B1 (en) | 2014-11-11 | 2014-11-11 | System and lifting unit for lifting loads of varying weight |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3020622B1 (en) |
DK (1) | DK3020622T3 (en) |
ES (1) | ES2635617T3 (en) |
PT (1) | PT3020622T (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1925582B1 (en) * | 2006-11-23 | 2010-06-23 | Siemens Aktiengesellschaft | Method and a device for mounting of wind turbine blades |
CN201151466Y (en) * | 2008-01-25 | 2008-11-19 | 南京中船绿洲机器有限公司镇江船舶辅机厂 | Raft and cargo crane for ship |
NO333202B1 (en) * | 2009-02-16 | 2013-04-08 | Nat Oilwell Varco Norway As | Method and apparatus for hoisting a package from a crane |
-
2014
- 2014-11-11 EP EP14388006.0A patent/EP3020622B1/en active Active
- 2014-11-11 PT PT143880060T patent/PT3020622T/en unknown
- 2014-11-11 ES ES14388006.0T patent/ES2635617T3/en active Active
- 2014-11-11 DK DK14388006.0T patent/DK3020622T3/en active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
ES2635617T3 (en) | 2017-10-04 |
PT3020622T (en) | 2017-09-11 |
EP3020622A1 (en) | 2016-05-18 |
DK3020622T3 (en) | 2017-07-03 |
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