Offshore wind turbine boom mounting method

Abstract

The invention provides an offshore wind turbine cantilever crane installation method. The method comprises the following steps that an auxiliary hoisting mechanism and a power unit are fixed to an under-tower structure, an on-tower support is fixed to a cabin, one end of a traction rope is connected with the power unit, and the other end of the traction rope is connected with the on-tower support and then extends to the under-tower structure; the head frame is hoisted to be hinged to a structure under the tower; a movable connecting structure is arranged on the head frame, and the traction rope extends to the end of the under-tower structure to be connected with the connecting structure; the auxiliary lifting mechanism is transferred to the head frame, the auxiliary lifting mechanism lifts the first middle frame, the middle frames are connected with the head frame, and the connecting structure is moved to the first middle frame; the auxiliary hoisting mechanism is transferred to the first middle frame; the installation operation of the first middle frame is repeated, after the multiple middle frames are sequentially connected and the connecting structures are sequentially moved and fixed, the tail frame is connected with the last middle frame, and the connecting structures are moved to the tail frame to be fixed; and dismounting the auxiliary hoisting mechanism to complete the installation of the cantilever crane. In this way, split type section-by-section installation of the cantilever crane is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a method for installing an offshore wind turbine boom. Background Art

[0002] With the increasing installed capacity of wind turbines and the increasing service life of wind turbines, wind turbines need to have their components replaced. Since the components are heavy and the tower is high, offshore wind turbines need to use outrigger boats to replace components. However, the use of outrigger boats will incur high lifting costs and is easily affected by wind and waves.

[0003] Therefore, a device for replacing components of an offshore wind turbine is needed. However, the arm length of the device for replacing components of an offshore wind turbine exceeds the wind turbine, and the device is large in size. It needs to be installed as a whole on the wind turbine, which requires a large ship, is costly, and is difficult to install. Therefore, it is necessary to provide a method for installing the arm of an offshore wind turbine. Summary of the invention

[0004] The present invention provides an offshore wind turbine boom installation method, which realizes the split-type section-by-section installation of the boom, and the operation is convenient and quick.

[0005] To achieve the above object, the present invention provides the following technical solutions.

[0006] A method for installing an offshore wind turbine boom, the boom comprising a head frame, a plurality of intermediate frames and a tail frame connected in sequence, the head frame being provided with a hinge mechanism; the tail frame being connected with a driving mechanism, the driving mechanism driving the boom to rotate relative to the wind turbine, the driving mechanism comprising a power unit, a traction rope and a tower support, the traction rope connecting the power unit, the tower support and the tail frame; the installation method comprising the following steps: Provide an auxiliary hoisting mechanism, fix the auxiliary hoisting mechanism to the structure under the tower, fix the power unit to the structure under the tower, fix the support on the tower to the nacelle, connect one end of the traction rope to the power unit, connect the other end to the support on the tower and then extend to the structure under the tower; The first frame is lifted by the auxiliary lifting mechanism and is hinged to the pre-arranged mounting seat of the lower tower structure through a hinge mechanism; A movable connecting structure is arranged and fixed on the first frame, and the end of the traction rope extending to the lower structure of the tower is connected to the connecting structure; Transferring the auxiliary lifting mechanism to the first frame to prepare for lifting the first intermediate frame; The auxiliary lifting mechanism lifts the first intermediate frame, connects the intermediate frame with the first frame, and moves the connecting structure to the first intermediate frame and fixes it; Transferring the auxiliary lifting mechanism to the first intermediate frame, preparing to lift the second intermediate frame; Repeat the installation operation of the first intermediate frame, connect the multiple intermediate frames in sequence and move and fix the connection structure in sequence, then connect the tail frame with the last intermediate frame, and move the connection structure to the tail frame and fix it; Remove the auxiliary lifting mechanism and complete the installation of the boom.

[0007] Preferably, a slide rail is provided on the top of the arm frame, and the slide rail is extended along a straight line on the first frame, the plurality of the intermediate frames and the tail frame, the connecting structure comprises a first pulley block, a slider is provided at the bottom of the first pulley block, the slider is provided with a slide groove matching the slide rail, the slider is suitable for moving along the slide rail, and a movable connecting structure is provided on the first frame, comprising the following steps: The connection structure is provided, and the first pulley block is installed on the slide rail through a slide groove on the slider that matches the slide rail.

[0008] Preferably, a locking hole is provided on the slide rail, and a locking pin is provided in the locking hole to prevent the connection structure from moving so as to fix the connection structure.

[0009] Preferably, moving the connecting structure comprises the following steps: detaching the locking pin that prevents the connecting structure from moving from the locking hole; The connecting structure is driven to move along the slide rail by an external driving mechanism, and at the same time, the power unit cooperates to release the traction rope; The installed part of the arm is rotated relative to the fan, and the pitch angle is adaptively adjusted to adapt to the movement distance of the connecting structure along the slide rail and the deviation of the release length of the traction rope.

[0010] Preferably, the first frame has a first end and a second end, the hinge mechanism is arranged at the first end, the second end is provided with a first connection interface, the intermediate frame has a third end and a fourth end, the third end and the fourth end are respectively provided with a second connection interface and a third connection interface, the second connection interface and the first connection interface are cooperatively connected, the third connection interface and the first connection interface have the same structure, and connecting the intermediate frame to the first frame comprises the following steps: The second connection interface is matched with the first connection interface, and the intermediate frame is connected to the first frame by a connecting piece passing through the second connection interface and the first connection interface.

[0011] Preferably, connecting a plurality of the intermediate frames in sequence comprises the following steps: The second connection interface of the latter intermediate rack is matched with the third connection interface of the former intermediate rack, and the intermediate racks are connected in sequence by a connecting piece passing through the second connection interface and the third connection interface.

[0012] Preferably, the tailstock has a fifth end and a sixth end, the fifth end is provided with a fourth connection interface, the lifting bracket is provided at the sixth end, the fourth connection interface and the third connection interface are matched and connected, and the tailstock is connected to the last intermediate frame, comprising the following steps: The fourth connection interface of the tail frame is matched with the third connection interface of the last intermediate frame, and the tail frame is connected to the last intermediate frame by a connector passing through the fourth connection interface and the third connection interface.

[0013] Preferably, the upper tower support is provided with a second pulley block, one end of the traction rope is connected to the power unit, and the other end passes around the second pulley block and then extends to the lower tower structure.

[0014] Preferably, the first pulley block includes a plurality of first pulleys arranged in sequence, the second pulley block includes a plurality of second pulleys arranged in sequence, one end of the traction rope is connected to the power unit, and the other end is connected to the second pulley block after passing around the second pulley and the first pulley multiple times.

[0015] Preferably, after the connection of the first frame, the middle frame or the tail frame is completed, the following steps are included: The power unit tightens or releases the traction rope to adjust the installed part of the boom to be parallel to the horizontal plane.

[0016] Compared with the prior art, the technical solution of the embodiment of the present invention has beneficial effects.

[0017] For example, the present invention can realize the split-section installation of the boom without using a large ship. A movable connecting structure is provided. During the split-section installation of the boom, the movement of the connecting structure can realize the movement of the towing rope and the boom connection point, which is convenient and quick to operate.

[0018] For another example, the present invention provides slide rails extending in a straight line on a first frame, a plurality of intermediate frames and a tail frame, and utilizes sliders on the connecting structure that match the slide rails to achieve fast and convenient movement of the connecting structure, thereby improving installation efficiency.

[0019] For another example, the present invention sets connection interfaces on the first frame, multiple intermediate frames and the tail frame, which can realize connection conveniently and improve installation efficiency; the unified connection interfaces of the intermediate frames make it possible to adjust the number of intermediate frames according to the height matching of the wind turbine, which has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of an offshore wind turbine component replacement device installed on a wind turbine in an embodiment of the present invention; Figure 2 is a flow chart of an offshore wind turbine boom installation method according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the first installation in an embodiment of the present invention; Figure 4 This is a side view of the first frame installation in an embodiment of the present invention; Figure 5 It is a schematic diagram of the connection structure installed on the first frame in an embodiment of the present invention; Figure 6 is a schematic diagram of a connection structure in an embodiment of the present invention; Figure 7 is a schematic diagram of the fixing of the connection structure in an embodiment of the present invention; Figure 8 This is a schematic diagram of the installation of the first intermediate frame in an embodiment of the present invention; Fig. 9 is a side view of the installation of the first intermediate frame in an embodiment of the present invention; Fig.10 is a schematic diagram of the connection of the intermediate frame in an embodiment of the present invention; Fig.11 It is a schematic diagram of the boom installation completed in the embodiment of the present invention.

[0021] Description of reference numerals: 1. Wind turbine; 11. Undertower structure; 12. Cabin; 13. Tower; 2. Boom; 21. First frame; 211. First end; 212. Second end; 213. First connection 22, middle frame; 221, third end; 222, fourth end; 223, second connection interface; 224, The third connection interface; 23, tailstock; 24, hinge mechanism; 25, connection structure; 251, first slide Wheel set; 252, slider; 26, slide rail; 261, lock hole; 27, lock pin; 28, connector; 29, Lifting bracket; 3. Driving mechanism; 31. Power unit; 32. Traction rope; 33. Support on tower; 331. Second pulley block; 4. Auxiliary lifting mechanism. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and beneficial effects of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described below are only used to explain the present invention, rather than to limit the present invention. In addition, the same or similar reference numerals may be used in the figures to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments and the description of the prior art elements, features, effects, etc. may be omitted.

[0023] Reference Figure 1 The offshore wind turbine 1 includes a tower 13 , a sub-tower structure 11 at the bottom of the tower 13 , and a nacelle 12 installed at the top of the tower 13 .

[0024] An offshore wind turbine component replacement device includes a boom 2 and a driving mechanism 3. The boom 2 is hinged to the wind turbine 1. The driving mechanism 3 includes a power unit 31, a traction rope 32 and a tower support 33. The traction rope 32 connects the power unit 31, the tower support 33 and the boom 2. The power unit 31 tightens or releases the traction rope 32 to drive the boom 2 to rotate. The boom 2 is provided with a lifting bracket 29, and a sling is provided on the lifting bracket 29. When lifting a heavy object, the sling lifts the heavy object, and the power unit 31 tightens the traction rope 32 to drive the boom 2 to rotate in a direction close to the wind turbine 1 until the lifting bracket 29 reaches above the cabin 12, and the sling lowers the heavy object to the cabin 12 for component replacement.

[0025] Reference Figures 2 to 11 , an embodiment of the present invention provides a method for installing an offshore wind turbine boom.

[0026] Specifically, the boom 2 includes a first frame 21, a plurality of intermediate frames 22 and a tail frame 23 connected in sequence, the first frame 21 is provided with an articulated mechanism 24; the tail frame 23 is connected to the driving mechanism 3, and the traction rope 32 is connected to the power unit 31, the tower support 33 and the tail frame 23; the installation method includes the following steps: S1: Provide an auxiliary hoisting mechanism 4, fix the auxiliary hoisting mechanism 4 to the lower tower structure 11, fix the power unit 31 to the lower tower structure 11, fix the upper tower support 33 to the nacelle 12, connect one end of the traction rope 32 to the power unit 31, and connect the other end to the upper tower support 33 and then extend to the lower tower structure 11; S2: The first frame 21 is lifted by the auxiliary lifting mechanism 4 and is hinged to the pre-set mounting seat 111 of the tower lower structure 11 through the hinge mechanism 24; S3: a movable connecting structure 25 is arranged on the first frame 21 and fixed, and the traction rope 32 is extended to the end of the lower tower structure 11 and connected to the connecting structure 25; S4: The auxiliary lifting mechanism 4 is transferred to the first frame 21, and is ready to lift the first intermediate frame 22; S5: The auxiliary lifting mechanism 4 lifts the first intermediate frame 22, connects the intermediate frame 22 to the first frame 21, and moves the connecting structure 25 to the first intermediate frame 22 and fixes it; S6: Transfer the auxiliary lifting mechanism 4 to the first intermediate frame 22, and prepare to lift the second intermediate frame; S7: Repeat the installation operation of the first intermediate frame 22 (steps S5 and S6), connect multiple intermediate frames 22 in sequence and move and fix the connecting structure 25 in sequence, then connect the tail frame 23 with the last intermediate frame 22, and move the connecting structure 25 to the tail frame 23 and fix it; S8: Remove the auxiliary suspension mechanism 4 and complete the installation of the boom 2.

[0027] In some embodiments, a slide rail 26 is provided on the top of the arm 2, and the slide rail 26 is extended along a straight line on the first frame 21, the plurality of intermediate frames 22 and the tail frame 23. The connection structure 25 includes a first pulley block 251, and a slider 252 is provided at the bottom of the first pulley block 251. The slider 252 is provided with a slide groove matching the slide rail 26, and the slider 252 is suitable for moving along the slide rail 26. The movable connection structure 25 is provided on the first frame 21, and the following steps are included: A connecting structure 25 is provided, and the first pulley set 251 is installed on the slide rail 26 through a slide groove on the slider 252 that matches the slide rail 26 .

[0028] In some embodiments, a locking hole 261 is provided on the slide rail 26 , and a locking pin 27 is provided in the locking hole 261 to prevent the connection structure 25 from moving so as to fix the connection structure 25 .

[0029] In some embodiments, moving the connection structure 25 comprises the following steps: Remove the locking pin 27 that prevents the connecting structure 25 from moving from the locking hole 261; The connecting structure 25 is driven to move along the slide rail 26 by an external driving mechanism (not shown), and at the same time, the power unit 31 cooperates to release the traction rope 32; The installed part of the arm 2 rotates relative to the wind turbine 1, and the pitch angle is adaptively adjusted to adapt to the deviation of the moving distance of the connecting structure 25 along the slide rail 26 and the release length of the traction rope 32; compensate for the length deviation of the traction rope 32 during the movement of the connecting structure 25 to avoid overload damage to components.

[0030] Specifically, the external driving mechanism can be a towing winch, electric hoist, etc., which drives the connecting structure 25 to move. The external driving mechanism can also be a rack added to the track, a gear and a driving mechanism added to the connecting structure 25, and the driving mechanism drives the meshing gears and racks to drive the connecting structure 25 to move. The external driving mechanism can also be other similar mechanisms that achieve this function, which is not limited here.

[0031] In some embodiments, the first frame 21 has a first end 211 and a second end 212, the hinge mechanism 24 is disposed at the first end 211, the second end 212 is provided with a first connection interface 213, the intermediate frame 22 has a third end 221 and a fourth end 222, the third end 221 and the fourth end 222 are respectively provided with a second connection interface 223 and a third connection interface 224, the second connection interface 223 and the first connection interface 213 are matched and connected, the third connection interface 224 and the first connection interface 213 have the same structure, and connecting the intermediate frame 22 with the first frame 21 includes the following steps: The second connection interface 223 is matched with the first connection interface 213 , and the intermediate frame 22 is connected to the first frame 21 via a connecting piece 28 that passes through the second connection interface 223 and the first connection interface 213 .

[0032] In some embodiments, connecting a plurality of intermediate frames 22 in sequence comprises the following steps: The second connection interface 223 of the rear intermediate frame 22 is matched with the third connection interface 224 of the front intermediate frame 22 , and the intermediate frames 22 are connected in sequence by the connecting member 28 passing through the second connection interface 223 and the third connection interface 224 .

[0033] In some embodiments, the tail frame 23 has a fifth end and a sixth end, the fifth end is provided with a fourth connection interface, the lifting bracket 29 is provided at the sixth end, the fourth connection interface and the third connection interface 224 are matched and connected, and the tail frame 23 is connected to the last intermediate frame 22, including the following steps: The fourth connection interface of the tail frame 23 is matched with the third connection interface 224 of the last intermediate frame 22 , and the tail frame 23 is connected to the last intermediate frame 22 via a connecting piece 28 passing through the fourth connection interface and the third connection interface 224 .

[0034] Specifically, the connecting member 28 is a pin or a bolt.

[0035] In some embodiments, the tower support 33 is provided with a second pulley block 331 , one end of the traction rope 32 is connected to the power unit 31 , and the other end passes around the second pulley block 331 and then extends to the lower tower structure 11 .

[0036] In some embodiments, the first pulley group 251 includes a plurality of first pulleys arranged in sequence, the second pulley group 331 includes a plurality of second pulleys arranged in sequence, one end of the traction rope 32 is connected to the power unit 31, and the other end is connected to the second pulley group 331 after passing around the second pulley and the first pulley multiple times; the load of the traction rope 32 is reduced, the safety is improved, and the service life of the traction rope 32 is increased.

[0037] In some embodiments, after the connection of the first frame 21, the middle frame 22 or the tail frame 23 is completed, the following steps are included: The power unit 31 tightens or releases the traction rope 32 to adjust the installed part of the boom 2 to be parallel to the horizontal plane.

[0038] In summary, the present invention can realize the split-section installation of the boom 2 without using a large ship. A movable connecting structure 25 is provided. During the split-section installation of the boom 2, the movement of the connecting structure 25 is used to realize the movement of the connection point between the traction rope 32 and the boom 2, and the operation is convenient and quick.

[0039] Furthermore, the present invention provides a slide rail 26 extending in a straight line on the first frame 21, the middle frames 22 and the tail frame 23, and utilizes a slider 252 on the connecting structure 25 that matches the slide rail 26 to achieve fast and convenient movement of the connecting structure 25, thereby improving installation efficiency.

[0040] Furthermore, the present invention sets connection interfaces on the first frame 21, multiple intermediate frames 22 and the tail frame 23, which can realize connection conveniently and improve installation efficiency; the unified connection interfaces of the intermediate frames 22 make it possible to adjust the number of intermediate frames 22 according to the height matching of the fan 1, which has strong applicability.

[0041] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claims, based on actual needs and where technically feasible, and the technical features from the corresponding independent claims may be combined in any appropriate manner rather than just by the specific combinations listed in the claims.

Claims

1. A method for installing an offshore wind turbine boom, characterized in that: The boom comprises a first frame, a plurality of intermediate frames and a tail frame connected in sequence, the first frame is provided with a hinge mechanism; the tail frame is connected with a driving mechanism, the driving mechanism drives the boom to rotate relative to the wind turbine, the driving mechanism comprises a power unit, a traction rope and a tower support, the traction rope connects the power unit, the tower support and the tail frame; the installation method comprises the following steps: Provide an auxiliary hoisting mechanism, fix the auxiliary hoisting mechanism to the structure under the tower, fix the power unit to the structure under the tower, fix the support on the tower to the nacelle, connect one end of the traction rope to the power unit, connect the other end to the support on the tower and then extend to the structure under the tower; The first frame is lifted by the auxiliary lifting mechanism and is hinged to the pre-arranged mounting seat of the lower tower structure through a hinge mechanism; A movable connecting structure is arranged and fixed on the first frame, and the end of the traction rope extending to the lower structure of the tower is connected to the connecting structure; Transferring the auxiliary lifting mechanism to the first frame to prepare for lifting the first intermediate frame; The auxiliary lifting mechanism lifts the first intermediate frame, connects the intermediate frame with the first frame, and moves the connecting structure to the first intermediate frame and fixes it; Transferring the auxiliary lifting mechanism to the first intermediate frame, preparing to lift the second intermediate frame; Repeat the installation operation of the first intermediate frame, connect the multiple intermediate frames in sequence and move and fix the connection structure in sequence, then connect the tail frame with the last intermediate frame, and move the connection structure to the tail frame and fix it; Remove the auxiliary lifting mechanism and complete the installation of the boom.

2. The offshore wind turbine boom installation method according to claim 1, characterized in that: A slide rail is arranged on the top of the arm frame, and the slide rail is arranged to extend in a straight line on the first frame, the plurality of the intermediate frames and the tail frame. The connecting structure includes a first pulley block, and a slider is arranged at the bottom of the first pulley block. The slider is provided with a slide groove matching the slide rail, and the slider is suitable for moving along the slide rail. A movable connecting structure is arranged on the first frame, and the following steps are included: The connection structure is provided, and the first pulley block is installed on the slide rail through a slide groove on the slider that matches the slide rail.

3. The offshore wind turbine boom installation method according to claim 2, characterized in that: A locking hole is provided on the slide rail, and a locking pin is provided in the locking hole to prevent the connection structure from moving so as to fix the connection structure.

4. The offshore wind turbine boom installation method according to claim 3, characterized in that: Moving the connection structure comprises the following steps: detaching the locking pin that prevents the connecting structure from moving from the locking hole; The connecting structure is driven to move along the slide rail by an external driving mechanism, and at the same time, the power unit cooperates to release the traction rope; The installed part of the arm is rotated relative to the fan, and the pitch angle is adaptively adjusted to adapt to the movement distance of the connecting structure along the slide rail and the deviation of the release length of the traction rope.

5. The offshore wind turbine boom installation method according to claim 1, characterized in that: The first frame has a first end and a second end, the hinge mechanism is arranged at the first end, the second end is provided with a first connection interface, the intermediate frame has a third end and a fourth end, the third end and the fourth end are respectively provided with a second connection interface and a third connection interface, the second connection interface and the first connection interface are matched and connected, the third connection interface and the first connection interface have the same structure, and connecting the intermediate frame to the first frame includes the following steps: The second connection interface is matched with the first connection interface, and the intermediate frame is connected to the first frame by a connecting piece passing through the second connection interface and the first connection interface.

6. The offshore wind turbine boom installation method according to claim 5, characterized in that: Connecting a plurality of the intermediate frames in sequence comprises the following steps: The second connection interface of the latter intermediate rack is matched with the third connection interface of the former intermediate rack, and the intermediate racks are connected in sequence by a connecting piece passing through the second connection interface and the third connection interface.

7. The offshore wind turbine boom installation method according to claim 5, characterized in that: The tailstock has a fifth end and a sixth end, the fifth end is provided with a fourth connection interface, the lifting bracket is provided at the sixth end, the fourth connection interface and the third connection interface are matched and connected, and the tailstock is connected to the last intermediate frame, including the following steps: The fourth connection interface of the tail frame is matched with the third connection interface of the last intermediate frame, and the tail frame is connected to the last intermediate frame by a connector passing through the fourth connection interface and the third connection interface.

8. The offshore wind turbine boom installation method according to claim 2, characterized in that: The tower upper support is provided with a second pulley block, one end of the traction rope is connected to the power unit, and the other end passes around the second pulley block and then extends to the lower structure of the tower.

9. The offshore wind turbine boom installation method according to claim 8, characterized in that: The first pulley block includes a plurality of first pulleys arranged in sequence, the second pulley block includes a plurality of second pulleys arranged in sequence, one end of the traction rope is connected to the power unit, and the other end is connected to the second pulley block after passing around the second pulley and the first pulley for multiple times.

10. The offshore wind turbine boom installation method according to claim 1, characterized in that: After the connection of the first frame, the middle frame or the tail frame is completed, the following steps are included: The power unit tightens or releases the traction rope to adjust the installed part of the boom to be parallel to the horizontal plane.

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