NL2030208B1 - Erecting a self-climbing tower crane - Google Patents

Erecting a self-climbing tower crane Download PDF

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Publication number
NL2030208B1
NL2030208B1 NL2030208A NL2030208A NL2030208B1 NL 2030208 B1 NL2030208 B1 NL 2030208B1 NL 2030208 A NL2030208 A NL 2030208A NL 2030208 A NL2030208 A NL 2030208A NL 2030208 B1 NL2030208 B1 NL 2030208B1
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NL
Netherlands
Prior art keywords
crane
tower
unit
lifting
boom
Prior art date
Application number
NL2030208A
Other languages
Dutch (nl)
Inventor
Bernardus Wijning Diederick
Original Assignee
Itrec 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 Itrec Bv filed Critical Itrec Bv
Priority to NL2030208A priority Critical patent/NL2030208B1/en
Priority to PCT/EP2022/087324 priority patent/WO2023118352A1/en
Application granted granted Critical
Publication of NL2030208B1 publication Critical patent/NL2030208B1/en

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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
    • 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
    • B66C23/26—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/28—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail constructed to operate at successively higher levels
    • B66C23/283—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail constructed to operate at successively higher levels with frameworks composed of assembled elements
    • 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
    • B66C23/26—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • B66C23/344—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes adapted for transport purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
    • F03D13/139—Assembling or erecting wind motors by using lifting means

Abstract

Method for erecting a self-climbing tower crane on a support at a hoisting site, wherein the crane comprises a crane base, a crane tower to be composed of tower segments that are to be stacked one-by-one onto one another, a crane tower lifting unit, and a slewable jib unit. The method comprises an arranging step, wherein an assembly is arranged at the hoisting site in an initiation state thereof, the assembly in said initiation state comprising: - the crane base placed on the support at the hoisting site, - the crane tower lifting unit pivotally mounted to the crane base and oriented horizontally, - the slewable jib unit connected to the crane tower lifting unit and oriented horizontally. The method comprises an upending step, wherein the interconnected crane tower lifting unit and slewable jib unit are pivoted relative to the crane base into a vertical orientation. The method further comprises a crane tower assembly phase, wherein — with the interconnected crane tower lifting unit and slewable jib unit in said vertical orientation — the crane tower is erected by stacking tower segments one-by-one onto one another to lengthen the crane tower under the jib unit, wherein the crane tower lifting unit performs a lifting action each time a tower segment has been stacked.

Description

P35442NL00
ERECTING A SELF-CLIMBING TOWER CRANE.
The present invention relates to the field of self-climbing tower cranes. In particular, the invention concerns the use of such a tower crane in the field of wind turbines, e.g. when assembling a wind turbine, installation or de-installing a wind turbine rotor blade, etc.
In the field of wind turbine installation and maintenance it is known to make use of a self- climbing tower crane. Generally such a crane comprises: - a crane base configured to the placed on the support at the hoisting site, - a crane tower to be erected on the crane base and to be composed of tower segments that are to be stacked one-by-one onto one another, - a crane tower lifting unit configured to perform a lifting action in the process of erecting the crane tower, - a slewable jib unit configured to be mounted on top of the crane tower.
For example, the Liebherr 1000 EC-B 125 Litronic Tower Crane has been used to erect a wind turbine having a hub height of 149 m and a rotor diameter of 115m. This crane has a 31.50m jib and provides a hook height of 164m, with a hoisting capacity of 100 tonnes.
A key factor in the deployment of cranes at the location of a wind turbine is the footprint.
Often a so-called hardstand or pad is often prepared close to the foundation of the wind turbine to allow for stable placement of the tower crane. Sometimes the crane base is secured directly to the foundation of the wind turbine.
The Liebherr crane is erected by a method that starts with an initiation phase wherein sizable auxiliary crawler crane is used to assemble the tower crane to an initial hook height of 39 m.
From this point the crane tower assembly phase takes place, wherein the crane tower is further erected by stacking tower segments one-by-one on top of one another to lengthen the crane tower under the jib unit. Herein the crane tower lifting unit is located directly underneath the jib unit and performs a lifting action each time a tower segment has been stacked. The crane tower segments are generally embodied as latticed steel segments having main chords at the corners with a square horizontal cross-section, in the case of the
Liebherr crane of 3.40m x 3.40m with a length of 5.80m. The jib of the Liebherr crane is of the non-luffing type, with a trolley that travels over the horizontal jib. The crane hoisting cable(s) depend from the trolley and extend to one or more winches of the slewable jib unit.
The Liebherr jib has a counter ballast jib section provided with a counter ballast.
Another known self-climbing tower crane for use in the field of wind turbine installation is disclosed in EP3434639 of S&L Access Systems AB. Herein the crane tower lifting unit is mounted on the crane base and remains at said location. In practice, the initiation phase of this known tower crane involves the use of one or more sizable auxiliary cranes to assemble the tower crane to an initial hook height. From this point the crane tower assembly phase takes place, wherein the crane tower is erected by stacking tower segments one-by-one underneath one another to lengthen the crane tower under the jib unit. Herein the crane tower lifting unit performs a lifting action each time a tower segment has been stacked underneath the already assembled part of the crane tower.
The present invention aims to provide a more efficient self-climbing tower crane, in particular in view of the initiation phase and/or in view of the size of the stabile support, often called hardstand, at the hoisting site for the crane that is needed in said phase.
The invention provides for a method for erecting a self-climbing tower crane on a support at a hoisting site, wherein the crane comprises: - acrane base configured to the placed on the support at the hoisting site, - a crane tower to be erected on the crane base and to be composed of tower segments that are to be stacked one-by-one onto one another, - a crane tower lifting unit configured to perform a lifting action in the process of erecting the crane tower, - a slewable jib unit configured to be mounted on top of the crane tower, wherein the method comprises an arranging step, wherein an assembly is arranged at the hoisting site in an initiation state thereof, the assembly in said initiation state comprising: - the crane base placed on the support at the hoisting site, - the crane tower lifting unit pivotally mounted to the crane base and oriented horizontally, - the slewable jib unit connected to the crane tower lifting unit and oriented horizontally, wherein the method comprises an upending step wherein the interconnected crane tower lifting unit and slewable jib unit are pivoted relative to the crane base into a vertical orientation,
wherein the method comprises a crane tower assembly phase, wherein — with the interconnected crane tower lifting unit and slewable jib unit in said vertical orientation — the crane tower is erected by stacking tower segments one-by-one onto one another to lengthen the crane tower under the jib unit, wherein the crane tower lifting unit performs a lifting action in association with the stacking of a tower segment.
Due to the inventive approach, the initiation phase can be performed more efficient, e.g. quicker, than in the mentioned prior art designs, and/or the size of the hardstand can be reduced, e.g. in view of the potential to avoid the use of a (sizable) auxiliary crane.
For example, as preferred, the tower crane is configured to hoist at load of at least 100 tonnes.
For example, as preferred, the jib has a length of at least 10 meters, e.g. between 12 and 18 meters.
For example, the hoisting cable depends from a sheave assembly at the tip end of the jib.
In a practical embodiment, the assembly in the initiation state, also comprises at least one tower crane segment that is retained by the lifting unit, wherein the slewable jib unit is connected to the crane tower lifting unit via this at least one tower crane segment.
Preferably, the at least one tower crane segment is retained such that the jib unit is as close as possible to the lifting unit in this initiation state in view of the subsequent upending step and the moment loads on the interconnected lifting unit and jib unit, as well as other components loaded in the upending process.
In a preferred embodiment, the lifting unit remains stationary and connected to the crane base in the crane tower assembly phase, with the crane tower being lengthened in upward direction from the lifting unit. As the lifting unit is likely to be subject to significant bending moment load during the upending step, this stationary arrangement of the lifting unit allows for a sturdy design of the lifting unit.
In a practical embodiment, the lifting unit comprises a lifting unit frame having an open top and an open bottom for successive passage of crane tower segments upward through the lifting unit from below when erecting the crane tower. The lifting unit further comprises a lifting actuator mechanism, e.g. comprising hydraulic cylinders, configured and operated to perform a stepwise lifting of the crane tower. The lifting unit further comprises a locking mechanism to lock the crane tower at appropriate moments in the lifting process.
In embodiments, after completion of the upending step, one or more stabilizing frame members are arranged between the crane base and the upended lifting unit.
Preferably, the assembly that is arranged at the hoisting site in an initiation state thereof further comprises a pivoting actuator mechanism that is configured and operated in the upending step to pivot the interconnected crane tower lifting unit and slewable jib unit in said vertical orientation. For example, use is made of a pivotal upending frame that is pivotally mounted to the crane base at one end and has a free outer end. A winch driven cable pull mechanism is provided between the free outer end of the upending frame and the crane base. The outer end of the frame is secured via one or more tensile members to the lifting unit so that upon exerting a pull force by means of the pull mechanism, the interconnected lifting unit and jib unit are upended. In another embodiment, one or more hydraulic cylinders are provided as pivoting actuator mechanism, mounted between the crane base and the lifting unit.
In a preferred embodiment, the method comprises: - the use of a first road vehicle to transport the crane base and the crane tower lifting unit pivotally mounted to the crane base and oriented horizontally to the hoisting site, - the use of a second road vehicle to transport the slewable jib unit oriented horizontally to the hoisting site, wherein the arranging step comprises manoeuvring the second road vehicle in alignment with the horizontally oriented crane tower lifting unit and connecting the slewable jib unit to the crane tower lifting unit.
This approach allows to unload the jib unit from the second vehicle via the upending step, so in unison with the lifting unit, without requiring intermediate handling (.e.g. by an auxiliary crane) of the jib unit. This approach also may allow for a significant size and/or hoisting capacity of the jib unit. For example, the second road vehicle has a trailer chassis on which the jib unit is loaded, e.g. the trailer chassis being embodied as a low flatbed trailer, on which the jib unit is loaded with the jib, preferably the entire jib, in horizontal orientation. For example, the jib is a rigid, non-telescoping jib, having a length of at least 10 meters.
In a preferred embodiment, the first road vehicle forms at least a part of the crane base. In the method the first road vehicle is parked on the support, e.g. the hardstand, at the hoisting site and the serves as (part of) the crane base. For example, the first road vehicle has a chassis, e.g. a trailer chassis, e.g. like a low flatbed trailer, that forms at least a part of the crane base. For example, the first road vehicle is provided with deployable support struts to stabilize the road vehicle on the support.
In a preferred embodiment, the second road vehicle also forms a part of the crane base, so remains at the hoisting site. For example, each of the first and second road vehicle have a chassis, e.g. a trailer chassis, e.g. a low flatbed trailer chassis, that forms a part of the crane base. Preferably, the arranging step comprises mechanically interconnecting the chassis of the first and second road vehicle to form a rigid component of the crane base. The latter allows to obtain a large and stabile crane base, e.g. in view of the upending of the interconnected lifting unit and jib unit.
In an embodiment, the slewable jib unit comprises a slew bearing mounted between a lower jib unit structure that is to be connected to the crane tower or the crane tower lifting unit and an upper jib unit structure, a jib that is pivotally mounted to the upper jib unit structure about a jib pivot axis, a jib luffing mechanism configured to luff the jib, a winch and associated hoisting cable depending from a sheave assembly on the jib. For example, one or more hydraulic cylinders are part of the jib luffing mechanism.
As preferred, the jib of the jib unit is substantially horizontal when transported to the hoisting site, e.g. on a trailer, e.g. with the lower jib unit structure being directed to the rear of the road vehicle.
In a practical embodiment, the jib unit is operated to handle the tower segments in the crane tower assembly phase, e.g. the jib unit being operated to lift the tower segment from a road vehicle.
In a practical embodiment, the first road vehicle is provided with a tower segment handling device that is movable between a first position underneath the vertically oriented lifting unit and a second position remote from the first position. In embodiments, a new tower segment is placed vertically on the tower segment handling device in the second position and then shifted by means of the tower segment handling device to the first position. In the first position the new tower segment is connected to the already assembled portion of the crane tower. Then the lifting unit is operated to perform a lifting action wherein the crane tower and the jib unit are lifted, so that a further new tower segment can be stacked underneath the crane tower. This process is repeated until the crane tower is high enough.
-B-
The present invention also relates to a self-climbing tower crane that is configured to be arranged on a support at a hoisting site, wherein the tower crane comprises: - a crane base configured to the placed on the support at the hoisting site, - a crane tower to be erected on the crane base and to be composed of tower segments that are to be stacked one-by-one onto one another, - a crane tower lifting unit configured to perform a lifting action in the process of erecting the crane tower, - a slewable jib unit configured to be mounted on top of the crane tower, wherein the crane base, crane tower lifting unit, and slewable jib unit are configured to be combined to an assembly that is to be arranged at the hoisting site in an initiation state thereof, the assembly in said initiation state comprising: - the crane base placed on the support at the hoisting site, - the crane tower lifting unit pivotally mounted to the crane base and oriented horizontally, - the slewable jib unit connected to the crane tower lifting unit and oriented horizontally, wherein the interconnected crane tower lifting unit and slewable jib unit are pivotal relative to the crane base into a vertical orientation in an upending step, and wherein the crane is configured to — with the interconnected crane tower lifting unit and slewable jib unit in said vertical orientation — erect the crane tower by stacking tower segments one-by-one onto one another to lengthen the crane tower under the jib unit, wherein the crane tower lifting unit is configured to perform a lifting action in association with the stacking of a tower segment.
In an embodiment, the assembly that is to be arranged at the hoisting site in an initiation state thereof further comprises a pivoting actuator mechanism that is configured to pivot the interconnected crane tower lifting unit and slewable jib unit into the vertical orientation in the upending step.
In an embodiment, the tower crane comprises: - a first road vehicle configured to transport the crane base and the crane tower lifting unit to the hoisting site, wherein the lifting unit is pivotally mounted to the crane base and is oriented horizontally on the first road vehicle,
- a second road vehicle configured to transport the slewable jib unit to the hoisting site, wherein the jib unit is oriented horizontally on the second road vehicle, and wherein the second road vehicle can be manoeuvred in alignment with the horizontally oriented crane tower lifting unit and the slewable jib unit and is then connectable to the crane tower lifting unit.
In an embodiment, a first road vehicle forms at least a part of the crane base, e.g. the first road vehicle having a chassis, e.g. a trailer chassis, that forms at least a part of the crane base.
In an embodiment, a second road vehicle also forms a part of the crane base, e.g. each of the first and second road vehicle have a chassis, e.g. a trailer chassis, that forms a part of the crane base, wherein, preferably, the chassis of the first and second road vehicles are mechanically interconnectable to form a rigid component of the crane base.
In an embodiment, the slewable jib unit comprises a slew bearing mounted between a lower jib unit structure that is to be connected to the crane tower or the crane tower lifting unit and an upper jib unit structure, a jib that is pivotally mounted to the upper jib unit structure about ajib pivot axis, a jib luffing mechanism configured to [uff the jib, a winch and associated hoisting cable depending from a sheave assembly on the jib.
The present invention also relates to the assembly of a wind turbine, wherein use is made of a method and/or tower crane as discussed herein. For example, the mast of the wind turbine is assembled from mast parts that are stacked on top of one another using the tower crane.
For example, the crane tower is extended after placement of a mast part, so the crane grows along with the wind turbine mast.
The present invention also relates to a method for installing or de-installing of a wind turbine component, e.g. a rotor blade, a nacelle component, etc., wherein use is made of a method and/or tower crane as discussed herein. For example, the nacelle is composed of multiple parts so as to stay within the hoisting capacity of the tower crane. For example, a hub part and a generator part are handled by the tower crane as separate loads to be hoisted, e.g. with another separate part forming the housing of the nacelle.
The present invention also relates to a tower crane as discussed herein, wherein the initiation has been done without the pivoting as discussed of the lifting unit and the jib unit in unison.
The invention will now be discussed with reference to the drawings wherein an example of a crane and method according to the invention illustrated. In the drawings: - figs. 1a, b show schematically, in a side view and from above, a first road vehicle of which the trailer forms part of the crane base, the crane tower lifting unit being pivotally connected to the crane base and in horizontal orientation, -figs 2a, b show schematically, in a side view and from above, a second road vehicle of which the trailer forms part of the crane base, the slewable jib unit loaded on the trailer in horizontal orientation thereof, - figs. 3a,b,c illustrate the parking of the first road vehicle at the hoisting site, the manoeuvring of the second road vehicle in alignment with the trailer of the first road vehicle, the interconnecting of the slewable jib unit loaded on the second road vehicle with the lifting unit on the first road vehicle prior to upending, - fig. 4a shows the provision of an upending frame, - fig. 4b shows the start of upending of the interconnected lifting unit and slewable jib unit, - fig. 5 shows the end of the upending step, wherein the interconnected lifting unit and slewable jib unit are oriented vertically on the crane base, - fig. 6 shows the provision of the stabilizing frame members for stabilizing the upended lifting unit, - fig. 7 shows the handling of a crane tower segment by means of the jib unit, wherein the tower segment is placed on a tower segment handling device in the second position thereof, -fig. 8 shows the tower segment being shifted by means of the tower segment handling device to the first position thereof underneath the lifting unit, - figs. 9a-d illustrate the stacking of a new tower segment underneath a tower segment retained in the lifting unit and the subsequent lift action of the crane tower by means of the lifting unit, -fig. 10 illustrates the continued lengthening of the crane tower by adding new segments as well as the luffing motion of the jib, - figs. 11a,b, c show the crane tower segment in side views and in top view, - figs. 12 and 13 show the crane of figures 1 — 11 erected alongside a wind turbine, - fig. 14 shows the situation of figures 12, 13 in a plan view, -fig. 15 illustrates the support struts of the crane base being deployed.
The figures 1a, b show schematically, in a side view and from above, a first road vehicle 10 embodied as a semi-trailer truck with a tractor 11 and a multi-axis trailer 12, here embodied as part of the crane base of the crane. The trailer 12, as preferred in view of allowable height for road travel, is embodied similar to a low flatbed trailer so as to allow for optimum cross- section of the lifting unit 50 (to be discussed below) and thereby of the cross-section of the crane tower.
The trailer 12 is provided with deployable, here outward swinging, support struts 13 to stabilize the trailer 12 on a support, for example a hardstand (also referred to a pad or crane pad) at the hoisting site, e.g. in proximity and/or even on the foundation of an onshore wind turbine 200 (see e.g. figures 12-14).
As will be discussed in more detail below, a crane tower lifting unit 50 is pivotally connected to the trailer 12 and is initially supported in a horizontal orientation thereon. Here the trailer 12 has at its forward end a support bracket 14 with a horizontal pivot axis 15 generally aligned with a side of the lifting unit 50.
A pedestal structure 18 mat be present, as shown here, intermediate the pivot axis 15 and the lifting unit 50 in order to provide sufficient clearance for placing a new tower segment 91 underneath the vertically oriented lifting unit 50 during the crane tower assembly phase as this lifting unit 50 is configured for stacking a new tower segment underneath the already constructed crane tower when lengthening the crane tower.
The figures 1a, b illustrate that a first crane tower segment 90 is initially retained in the lifting unit 50 as will also be discussed in more detail below.
The figures 1a, b also show the presence of a pivotal upending frame 20 that is to be pivotally mounted to the trailer 12 at one end and has a free outer end. A winch driven cable pull mechanism is provided between the free outer end of the upending frame 20 and the trailer. In more detail, in this example, the trailer 12 is provided with an upending winch 22 which drives an upending cable 24 that extends in a multi-fall arrangement between a sheave set on the trailer 12 and a sheave set on the outer end of the upending frame 20. The figures 1a, b also depict schematically the provision of one or more tensile members 25 that are to be connected between the upending frame 20 and the lifting unit 50 so that upon exerting a pull force by means of the winch driven cable 24, the interconnected lifting unit and jib unit, which is still to be discussed, are upended. In another embodiment, one or more hydraulic cylinders are provided as pivoting actuator mechanism, mounted between the trailer 12 and the lifting unit 50.
The total length of the road vehicle 10 as depicted can be over 20 meters, e.g. about 25 meters.
For example, the trailer 12 with the lifting unit 50 thereon as depicted has a width of about 3 meters and a height of about 4.1 meters.
The total weight of the road vehicle 10 as depicted can be over 50 tonnes, e.g. about 75 tonnes, e.g. with about 15 tonnes load on the kingpin and a load of about 10 tonnes per axle of the multi-axis trailer 12.
The figures 2a, b show schematically, in a side view and from above, a second road vehicle 30 embodied as a semi-trailer truck with a tractor 31 and a multi-axis trailer 32, The second road vehicle 30 is used to transport the slewable jib unit 70 loaded in horizontal orientation on the trailer 32 to the hoisting site. As preferred, and as will be discussed below, the second trailer 32 is also embodied as part of the crane base of the crane.
The jib unit 70 comprises a slew bearing 72 mounted between a lower jib unit structure 71 that is to be connected to a crane tower segment (as will be discussed in more detail below) and an upper jib unit structure 73. A slew drive is present as well.
The jib unit 70 further comprises a jib 75 that is pivotally mounted to the upper jib unit structure 73 about a jib pivot axis 74. In this example, two hydraulic cylinders 77 form part of the jib luffing mechanism which is configured to luff the jib 75 up and down. The jib unit 70 further comprises a hoist winch 76 and associated hoist cable 77 which runs over sheaves 78a,b of the jib 75 to a travelling block 79 of the crane, here with a swivelling hook.
In the transport situation the jib 75 lies generally horizontally on the road vehicle, here trailer 32.
As preferred, the jib 75 is a rigid jib lacking articulation.
As preferred, the jib is a box type jib.
The figure 3a illustrate the parking of the first road vehicle 10 at the hoisting site and the deployment of any stabilizing struts. For example, as shown in figures 12 — 14, the trailer 12 is parked on a hardstand in close proximity to a wind turbine that is to be (dis-)assembled and/or completed and/or subject to maintenance. As follows from figure 3b, the tractor 11 can be disconnected from the trailer 12.
The figure 3b illustrated the manoeuvring of the second road vehicle 30 in alignment with the trailer 12 of the first road vehicle 10. As shown, it is envisaged that the top of the still horizontally oriented lifting unit 50 is at the rear of the trailer 12 and the lower end of the jib unit 70 is at the rear of the trailer 32. This allows to back-up the vehicle 30 to bring the jib unit 70 close to the lifting unit 50.
Figure 3c illustrates that act of interconnecting of the slewable jib unit loaded on the trailer 32 of the second road vehicle 30 with the lifting unit 50 still horizontal on the trailer 12 of the first road vehicle 10 prior to upending.
In more detail, a first or upper tower segment 90 is already retained initially in the lifting unit 50, and the lower jib unit structure 71 is provided with connectors allowing to connect the jib unit 70 to the upper end of the first tower segment 90. This effectively connects the jib unit, via the tower segment 90, to the lifting unit 50. In another approach, a direct temporary connection is provided between the jib unit 70 and the lifting unit 50 prior to upending, or such direct connection is provided in addition to the connection to the upper tower segment 90.
Figure 3c also depicts the preferred approach wherein the trailers 12, 32, each forming part of the crane base, are mechanically connected so as to form a rather long, e.g. over 30 meters long, rigid component of the crane base. Herein the chassis, here of trailers 12, 32, of both road vehicles 10, 30 are connected via mechanical connectors 12a, 32a, here at their rear ends. The latter allows to obtain a large and stabile crane base, e.g. in view of the upending of the interconnected lifting unit and jib unit as will be discussed below.
In figure 4a it is illustrated that the upending frame 20 is deployed so that the outer end is well above the pivot axis. The outer end of the frame is secured via one or more tensile members to the lifting unit 50. The winch driven cable 24 is arranged between the outer end of the frame 20 and the trailer and is driven by winch 22.
The figure 4b demonstrates the start of the upending step. Upon exerting a pull force by means of the pull mechanism, the interconnected lifting unit 50 and jib unit 70 start to be upended. This requires very significant upending torque provided by the winch 22. The rigidly connected trailers 12, 32 effectively provide a stable platform during upending.
In an embodiment, a ballast is (temporarily) placed on the crane base, e.g. on the first road vehicle, e.g. on trailer 12, to stabilize the crane base in particular for the upending phase. For example, the crane base is provided with water ballast tanks that can be filled at the hoisting site.
Figure 5 shows that the upending step is completed. The interconnected lifting unit 50 and jib unit 70 are now vertically oriented. The luffing mechanism has held the jib 75 extended during this process, as is preferred.
It will be appreciated that the approach illustrated with reference to figures 3a-c, 4a, 4b does not require the use of any auxiliary crane, or at least not of any sizable crane as in the prior art. Also there is no need for additional hardstand area for any such sizable auxiliary crane to stand during this initiation of the tower crane. Furthermore working a height of personnel is generally not required in this initiation phase, again in contrast to the mentioned prior art approaches.
As preferred, the jib unit 70 is fully outfitted before the upending takes place. For example, the entire jib 75 is part of the jib unit 70 that is to be upended, with no need to add one or more jib sections to the jib 75 that is connected to the upper part 73. This avoids the use of a sizable auxiliary crane as in the prior art approaches wherein the jib is assembled at significant height above the ground as a part of the crane tower has already been erected.
As depicted, the jib unit 70 is devoid of counter ballast, which is preferred in view of the upending loads. In another embodiment, counter ballast can be provided on the jib unit, e.g. to be installed later, e.g. by means of the hoisting winch system of the jib unit 70 itself.
The figure 6 shows that, after completion of the upending step, one or more stabilizing frame members 35 are arranged between the crane base, here the trailer 12, and the upended lifting unit 30.
The figures 7 and 8 illustrate the handling of a crane tower segment 91 by means of the jib unit 70. In figure 7 this tower segment 91 is placed on a tower segment handling device 100 that is mounted on the road vehicle 10, here on the trailer 12. For example, as shown schematically, the device 100 comprises a cart 101 that is movable over rails of the device, e.g. in longitudinal direction of the trailer 12 between the second position thereof shown in figure 7 and the first position thereof shown in figure 8. The tower segment 91 is placed in vertical orientation on the cart 101 by means of the jib unit 70, e.g. the jib unit being used to first lift the segment 91 from a transport vehicle and then placing the segment on the cart 101. The cart 101 is then shifted, so that the segment 91 becomes arranged underneath the lifting unit 50.
The figures 9a-d illustrate, by way of example, the operation of the lifting unit 50. The situation of figure 9a corresponds the segment 91 just being shifted to underneath the lifting unit 50. The upper tower segment 90, on which the jib unit 70 is mounted, is now spaced vertically from the segment 91.
In figure 9b, the lifting unit 50 is operated to lower the segment 90 so that the connectors of the segments 90, 91 are connectable, e.g. via pins to be introduced through aligned holes in tabs on the corners of the segments 90, 91, e.g. at the ends of the main chords of the segment.
The lifting unit 50 is provided with hydraulic operated lifting actuators 51 to controllable lift and lower the segment of the crane tower that passes through the lifting unit 50.
In figure 9c, after the connection between the segments 90, 91 has been made, the still rather short crane tower with the jib unit 70 thereon is lifted by means of the actuators 51 in a stepwise process, as is further depicted in figure 9d. After each stroke of the actuators 51, a locking mechanism of the lifting unit retains the crane tower, allowing the actuators 51 to retract in order to allow for a next stroke. This process is repeated until the situation of figure 9a is achieved, allowing to add another segment to the crane tower. This effectively is stacking segments underneath one another to lengthen the crane tower.
The so-called crane tower assembly phase is continued until the crane tower has reached it desired height. This is depicted in figure 10.
The figures 11a-c show the crane tower segment 90 in side views and in top view. Generally, each segment 90 is embodied as a latticed structure with main chords at the corners and (diagonal) bracing between adjacent chords. Connectors are provided at the ends of the chords.
As discussed, the crane 1 of figures 1 — 11 can be erected alongside a wind turbine 200 shown in figures 12 and 13. As is known in the art, along the height of the crane one or more guy arrangements 110, 111 can be provided that connect the crane tower to the mast 201 of the wind turbine 200. For example, the crane tower has a height of more than 100 meters, e.g. of more than 130 meters.
As shown in figures 12, 13 the crane can be assembled such that the jib unit 70 is at of even above the top of the mast 201, e.g. allowing for hoisting of a component of the nacelle 202 or of a wind turbine rotor blade 203 using the crane.
As shown in the plan view of figure 14, the crane base, here the first and second trailers 12, 32, can be parked in close proximity of the foot of the mast 210, e.g. with a spacing between the center of the mast 201 and of the crane tower of between 6 and 10 meters.
Figures 14 and 15 shows that folding struts 13 on the trailer 12 can be deployed outward from the sides of the trailer 12 so as to stabilize the tower crane on the hardstand 2 or pad adjacent the foot of the wind turbine mast 201.
Whilst it is preferred to integrate at least at part of the crane base with a road vehicle, e.g. a trailer 12, it is also envisaged that a part of the crane base is offloaded from a road vehicle at the hoisting site and installed directly on the support. For example, the crane base (or part thereof) is installed on the foundation of the wind turbine, e.g. bolts temporarily securing the crane base to the foundation of the wind turbine mast.
Whilst it is preferred to transport at least a part of the crane base as well as the lifting unit with a single road vehicle, e.g. on a trailer 12, one can also envisage the use of multiple, e.g. two road vehicles for transport of these main components of the crane to the hoisting site.
Then an assembly step will be required to connect the crane base and the lifting unit. One can envisage that a routine similar to the routine illustrated with reference to figures 3a — 3c is used to connect the lifting unit to the crane base. One can also envisage that the crane base is offloaded from the one road vehicle, e.g. to be secured to the wind turbine foundation, and then the lifting unit is transported with another vehicle, wherein the lifting unit remains horizontally on the other vehicle while the connection is made to the crane base.
Other approaches to arrive at the assembly in its initiation state as discussed herein are also possible.
Whilst it is preferred to use a lifting unit 50 that remains stationary at the lower end of the crane tower, the inventive concept also allows for the known embodiment of the lifting unit which remains directly underneath the jib unit and thus moves up with the lengthening of the crane tower.

Claims (14)

CONCLUSIESCONCLUSIONS 1. Werkwijze voor het oprichten van een zelfklimmende torenkraan (1) op een ondersteuning op een hijslocatie, waarbij de kraan omvat: -een kraanbasis (12,32) die is ingericht om op de ondersteuning (2) op de hijslocatie te worden geplaatst, - een kraantoren om op de kraanbasis te worden opgericht en om te zijn samengesteld uit torensegmenten (90,91) die één voor één worden gestapeld, - een kraantorenhefeenheid (50) ingericht om in het proces van het oprichten van de kraantoren een hefactie uit te voeren, - een zwenkbare giekeenheid (70) ingericht om boven op de kraantoren te worden geplaatst, waarbij de werkwijze een opstelstap omvat, waarin een samenstel in een initiatiestaat daarvan op de hijslocatie wordt opgesteld, waarbij het samenstel in die initiatiestaat omvat: - de op de hijslocatie op de ondersteuning geplaatste kraanbasis (12,32), - de kraantorenhefeenheid (50), zwenkbaar verbonden met de kraanbasis en horizontaal georiënteerd, - de slewbare giekeenheid (70), verbonden met de kraantorenhefeenheid en horizontaal georiënteerd, waarbij de werkwijze een rechtopzetstap omvat waarin de onderling verbonden kraantorenhefeenheid (50) en slewbare giekeenheid(70) ten opzichte van de kraanbasis (12,32) naar een verticale oriëntatie worden gezwenkt, waarbij de werkwijze een kraantorensamenstelfase omvat, waarin - met de onderling verbonden kraantorenhefeenheid en slewbare giekeenheid in de verticale oriëntatie - de kraantoren opgericht wordt door torensegmenten (90,91) één voor één te stapelen om de kraantoren onder de giekeenheid (70) te verlengen, waarbij de kraantorenhefeenheid (50) een hefactie uitvoert betrokken bij het stapelen van een torensegment (91).A method of erecting a self-climbing tower crane (1) on a support at a lifting location, the crane comprising: - a crane base (12,32) adapted to be placed on the support (2) at the lifting location, - a crane tower to be erected on the crane base and to be composed of tower segments (90,91) stacked one by one, - a crane tower lifting unit (50) arranged to perform a lifting action in the process of erecting the crane tower carry, - a slewing boom unit (70) arranged to be placed on top of the crane tower, the method comprising a setting-up step, wherein an assembly is positioned in an initiation state thereof at the lifting location, the assembly in that initiation state comprising: the lifting location placed on the support crane base (12,32), - the crane tower lifting unit (50), pivotally connected to the crane base and horizontally oriented, - the slewable boom unit (70), connected to the crane tower lifting unit and horizontally oriented, the method being an erecting step wherein the interconnected crane tower lift unit (50) and slewable boom unit (70) are swung relative to the crane base (12,32) to a vertical orientation, the method comprising a crane tower assembly stage, wherein - with the interconnected crane tower lift unit and slewable boom unit in the vertical orientation - the crane tower is erected by stacking tower segments (90,91) one by one to extend the crane tower below the boom unit (70), the crane tower lifting unit (50) performing a lifting action involved in stacking a tower segment (91 ). 2. Werkwijze volgens conclusie 1, waarbij het samenstel dat op de hijslocatie in een initiatiestaat daarvan wordt opgesteld voorts een zwenkactuatormechanisme (22,24,25) omvat dat is ingericht en in de rechtopzetstap bediend wordt om de onderling verbonden kraantorenhefeenheid en slewbare giekeenheid in de verticale oriëntatie te zwenken.The method of claim 1, wherein the assembly deployed at the lifting site in a triggering state thereof further comprises a swing actuator mechanism (22,24,25) arranged and operated in the erecting step to raise the interconnected crane tower lifting unit and slewable boom unit into the vertical orientation. 3. Werkwijze volgens conclusie 1 of 2, waarbij de werkwijze omvat:A method according to claim 1 or 2, wherein the method comprises: - het gebruik van een eerste wegvoertuig (10) om de kraanbasis (12) en de kraantorenhefeenheid (50), zwenkbaar met de kraanbasis (12) verbonden en horizontaal georiénteerd, naar de hijslocatie te transporteren, - het gebruik van een tweede wegvoertuig (30) om de slewbare giekeenheid (70), horizontaal georiënteerd, naar de hijslocatie te transporteren, en waarbij de opstelstap het manoeuvreren van het tweede wegvoertuig (30) in lijn met de horizontaal georiënteerde kraantorenhefeenheid (50) omvat en het verbinden van de slewbare hefeenheid met de kraantorenhefeenheid.- using a first road vehicle (10) to transport the crane base (12) and the crane tower lifting unit (50), pivotally connected to the crane base (12) and oriented horizontally, to the lifting location, - using a second road vehicle (30 ) to transport the slewable boom unit (70) horizontally oriented to the lifting location, and wherein the set up step includes maneuvering the second road vehicle (30) into alignment with the horizontally oriented crane tower lift unit (50) and connecting the slewable lift unit to the crane tower lifting unit. 4. Werkwijze volgens conclusie 3, waarbij het eerste wegvoertuig (10) ten minste een deel van de kraanbasis vormt, bijv. waarbij het eerste wegvoertuig een chassis heeft, bijv. een aanhanger (12), welke ten minste een deel van de kraanbasis vormt.A method according to claim 3, wherein the first road vehicle (10) forms at least part of the crane base, e.g. wherein the first road vehicle has a chassis, e.g. a trailer (12), which forms at least part of the crane base . 5. Werkwijze volgens conclusie 4, waarbij het tweede wegvoertuig (30,32) tevens een deel van de kraanbasis vormt, bijv. waarbij elk van het eerste en tweede wegvoertuig een chassis heeft, bijv. een aanhanger (12,32) welke een deel van de kraanbasis vormt, waarbij, bij voorkeur, de opstelstap het mechanisch onderling verbinden van het chassis (12,32) van het eerste en tweede wegvoertuig omvat om een starre component van de kraanbasis te vormen.A method according to claim 4, wherein the second road vehicle (30,32) also forms part of the crane base, e.g. each of the first and second road vehicle having a chassis, e.g. a trailer (12,32) which forms part of the crane base, preferably wherein the erecting step includes mechanically interconnecting the chassis (12,32) of the first and second road vehicle to form a rigid component of the crane base. 6. Werkwijze volgens een of meer van de voorgaande conclusies, waarbij de slewbare giekeenheid (70) omvat een slewlager (72) dat is aangebracht tussen een onderste giekeenheidstructuur (71), die is ingericht om te worden verbonden met de kraantoren of de kraantorenhefeenheid, en een bovenste giekstructuur (73), een giek (75) die om een giekzwenkas (74) zwenkbaar is verbonden met de bovenste giekstructuur, een giekoploefsamenstel (77) dat is ingericht om de giek omhoog en omlaag te bewegen, een lier (76) en een bijbehorende hijskabel (76a) die van een schijfsamenstel van de giek naar beneden hangt.A method according to any one of the preceding claims, wherein the slewable boom unit (70) comprises a slew bearing (72) mounted between a lower boom unit structure (71) adapted to be connected to the crane tower or crane tower lifting unit, and an upper boom structure (73), a boom (75) pivotally connected to the upper boom structure about a boom swing axis (74), a boom luffing assembly (77) configured to raise and lower the boom, a winch (76) and an associated hoist rope (76a) suspended from a sheave assembly of the boom. 7. Zelfklimmende torenkraan die is ingericht om op een ondersteuning op een hijslocatie te worden opgesteld, waarbij de torenkraan omvat: - een kraanbasis die is ingericht om op de ondersteuning op de hijslocatie te worden geplaatst, - een kraantoren om op de kraanbasis opgericht te worden en om te worden samengesteld uit torensegmenten die één voor één op elkaar worden gestapeld, - een kraantorenhefeenheid ingericht om in het proces van het oprichten van de kraantoren een hefactie uit te voeren,7. Self-climbing tower crane adapted to be erected on a support at a lifting location, the tower crane comprising: - a crane base adapted to be placed on the support at the lifting location, - a crane tower to be erected on the crane base and to be composed of tower segments stacked one by one, - a crane tower lifting unit adapted to perform a lifting action in the process of erecting the crane tower, - een slewbare giekeenheid ingericht om boven op de kraantoren te worden geplaatst, waarbij de kraanbasis, de kraantorenhefeenheid, en zwenkbare giekeenheid zijn ingericht om te worden gecombineerd tot een samenstel dat in een initiatiestaat daarvan op de hijslocatie wordt opgesteld, waarbij het samenstel in die initiatiestaat omvat: - de op de ondersteuning op de hijslocatie geplaatste kraanbasis, - de kraantorenhefeenheid, zwenkbaar verbonden met de kraanbasis en horizontaal georiënteerd, - de slewbare giekeenheid, verbonden met de kraantorenhefeenheid en horizontaal georiënteerd, waarbij de onderling verbonden kraantorenhefeenheid en slewbare giekeenheid in een rechtopzetstap ten opzichte van de kraanbasis zwenkbaar zijn naar een verticale oriëntatie, en waarbij de kraan is ingericht om - met de onderling verbonden kraantorenhefeenheid en zwenkbare giekeenheid in de verticale oriëntatie - de kraaneenheid op te richten door torensegmenten één voor één op elkaar te stapelen om de kraantoren onder de giekeenheid te verlengen, waarbij de kraantorenhefeenheid is ingericht om een bij het stapelen van een torensegment (91) betrokken hefactie uit te voeren.- a slewable boom unit arranged to be placed on top of the crane tower, the crane base, the crane tower lifting unit, and slewing boom unit being arranged to be combined into an assembly which is arranged in an initiation state thereof at the lifting location, the assembly in that initiation state includes: - the crane base placed on the support at the lifting location, - the crane tower lift unit, pivotally connected to the crane base and oriented horizontally, - the slewable boom unit, connected to the crane tower lift unit and oriented horizontally, with the interconnected crane tower lift unit and slewable boom unit in an erecting step be pivotable relative to the crane base to a vertical orientation, and wherein the crane is arranged - with the interconnected crane tower lifting unit and swinging boom unit in the vertical orientation - to erect the crane unit by stacking tower segments one at a time to support the crane tower extend below the boom unit, the crane tower lifting unit being arranged to perform a lifting action involved in stacking a tower segment (91). 8. Torenkraan volgens conclusie 7, waarbij het op de hijslocatie in een initiatiestaat daarvan op te stellen samenstel voorts een zwenkactuatormechanisme (20,22,24) omvat dat is ingericht om de onderling verbonden kraantorenhefeenheid en slewbare giekeenheid naar de verticale oriëntatie te zwenken in de rechtopzetstap.A tower crane according to claim 7, wherein the assembly to be deployed at the hoisting location in an initiation state thereof further comprises a swing actuator mechanism (20,22,24) adapted to swing the interconnected crane tower lift unit and slewable boom unit to the vertical orientation in the upright step. 9. Torenkraan volgens conclusie 7 of 8, waarbij de torenkraan omvat: - een eerste wegvoertuig (10), ingericht om de kraanbasis en de kraantorenhefeenheid naar de hijslocatie te transporteren, waarbij de hefeenheid zwenkbaar is bevestigd aan de kraanbasis en horizontaal is georiënteerd op het eerste wegvoertuig, - een tweede wegvoertuig (30), ingericht om de slewbare giekeenheid naar de hijslocatie te transporteren, waarbij de giekeenheid horizontaal op het tweede wegvoertuig is georiënteerd, en waarbij het tweede wegvoertuig in lijn met de horizontaal georiënteerde kraantorenhefeenheid kan worden gemanoeuvreerd en de slewbare giekeenheid daarna verbindbaar is met de kraantorenhefeenheid.A tower crane according to claim 7 or 8, wherein the tower crane comprises: - a first road vehicle (10) adapted to transport the crane base and the crane tower lifting unit to the lifting location, the lifting unit being pivotally attached to the crane base and oriented horizontally to the first road vehicle, - a second road vehicle (30) adapted to transport the slewable boom unit to the lifting location, the boom unit being oriented horizontally on the second road vehicle, and the second road vehicle being maneuverable in line with the horizontally oriented crane tower lifting unit and the slewable boom unit is subsequently connectable to the crane tower lift unit. 10. Torenkraan volgens één of meer van de conclusies 7-9, waarbij een eerste wegvoertuig ten minste een deel van de kraanbasis vormt, bijv. waarbij het eerste wegvoertuig een chassis heeft, bijv. een aanhangerchassis, dat ten minste een deel van de kraanbasis vormt.A tower crane according to any one of claims 7 to 9, wherein a first road vehicle forms at least part of the crane base, e.g. wherein the first road vehicle has a chassis, e.g. a trailer chassis, which forms at least part of the crane base forms. 11. Torenkraan volgens conclusie 10, waarbij een tweede wegvoertuig eveneens een deel van de kraanbasis vormt, bijv. waarbij elk van het eerste en tweede wegvoertuig een chassis heeft, dat een deel van de kraanbasis vormt, waarbij, bij voorkeur, het chassis van de eerste en tweede wegvoertuigen mechanisch onderling verbindbaar zijn om een starre component van de kraanbasis te vormen.A tower crane according to claim 10, wherein a second road vehicle also forms part of the crane base, e.g. wherein each of the first and second road vehicles has a chassis forming part of the crane base, preferably wherein the chassis of the first and second road vehicles are mechanically interconnectable to form a rigid component of the crane base. 12. Torenkraan volgens één of meer van de conclusies 7-11, waarbij de slewbare giekeenheid omvat een slewlager aangebracht tussen onderste giekeenheidstructuur, die is ingericht om te worden verbonden met de kraantoren of de kraantorenhefeenheid, en een bovenste giekeenheidstructuur, een giek die om een giekzwenkas zwenkbaar met de bovenste giekeenheidstructuur is verbonden, een giekloefmechanisme dat is ingericht om de giek op te loeven, en een lier en bijbehorende hijskabel die van een schijfsamenstel op de giek naar beneden hangt.A tower crane as claimed in any one of claims 7 to 11, wherein the slewable boom unit comprises a slew bearing disposed between lower boom unit structure adapted to be connected to the crane tower or crane tower lifting unit and an upper boom unit structure, a boom which is about a boom swing axle pivotally connected to the upper boom unit structure, a boom luffing mechanism adapted to luff the boom, and a winch and associated hoist rope suspended from a sheave assembly on the boom. 13. Werkwijze voor het samenstellen van een windturbine, waarbij gebruik wordt gemaakt van een werkwijze en/of torenkraan volgens één of meer van de conclusies 1-12.13. Method for assembling a wind turbine, using a method and/or tower crane according to one or more of claims 1-12. 14. Werkwijze voor het installeren of de-installeren van een windturbinecomponent, bijv. een rotorblad, een nacelle-component, etc., waarbij gebruik wordt gemaakt van een werkwijze en/of torenkraan volgens één of meer van de conclusies 1-12.A method for installing or de-installing a wind turbine component, e.g. a rotor blade, a nacelle component, etc., using a method and/or tower crane according to one or more of claims 1-12.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370674A1 (en) * 1976-11-16 1978-06-09 Liebherr Werk Bischofshofen Crane with telescopic column - has extension by hydraulic jacks also able to swing column to horizontal position when not in use (SW 12.6.78)
DE2931422A1 (en) * 1979-08-02 1981-02-12 Reich Maschinen Gmbh TURNING TOWER CRANE
DE3147942A1 (en) * 1981-12-03 1983-06-16 Liebherr-Werk Biberach Gmbh, 7950 Biberach Method of erecting a tower crane rotating at the top, and a tower crane for carrying out such a method
WO2006058751A2 (en) * 2004-12-03 2006-06-08 Manitowoc Crane Group Germany Gmbh Vehicle crane
DE102012019248A1 (en) * 2012-09-28 2014-04-03 Liebherr-Werk Biberach Gmbh Tower Crane
EP3434639A1 (en) 2017-07-27 2019-01-30 S&L Access Systems AB A lifting assembly for elevating components to a wind turbine and a method for using the lifting assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370674A1 (en) * 1976-11-16 1978-06-09 Liebherr Werk Bischofshofen Crane with telescopic column - has extension by hydraulic jacks also able to swing column to horizontal position when not in use (SW 12.6.78)
DE2931422A1 (en) * 1979-08-02 1981-02-12 Reich Maschinen Gmbh TURNING TOWER CRANE
DE3147942A1 (en) * 1981-12-03 1983-06-16 Liebherr-Werk Biberach Gmbh, 7950 Biberach Method of erecting a tower crane rotating at the top, and a tower crane for carrying out such a method
WO2006058751A2 (en) * 2004-12-03 2006-06-08 Manitowoc Crane Group Germany Gmbh Vehicle crane
DE102012019248A1 (en) * 2012-09-28 2014-04-03 Liebherr-Werk Biberach Gmbh Tower Crane
EP3434639A1 (en) 2017-07-27 2019-01-30 S&L Access Systems AB A lifting assembly for elevating components to a wind turbine and a method for using the lifting assembly

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