A method for installing the boom of an offshore wind turbine

Abstract

The present invention provides a method for installing an offshore wind turbine boom, which includes the following steps: fixing an auxiliary hoisting mechanism and a power unit to the lower tower structure, fixing an upper tower support to the nacelle, connecting one end of a towing rope to the power unit, connecting the other end to the upper tower support and then extending it to the lower tower structure; hoisting the first section and hinging it to the lower tower structure; arranging a movable connection structure on the first section, and connecting the end of the towing rope extending to the lower tower structure to the connection structure; transferring the auxiliary hoisting mechanism to the first section, hoisting the first intermediate section with the auxiliary hoisting mechanism, connecting the intermediate section to the first section, and moving the connection structure to the first intermediate section; transferring the auxiliary hoisting mechanism to the first intermediate section; repeating the installation operation of the first intermediate section, connecting multiple intermediate sections in sequence and moving and fixing the connection structure in sequence, then connecting the tail section to the last intermediate section, and moving the connection structure to the tail section for fixing; removing the auxiliary hoisting mechanism to complete the installation of the boom. In this way, the split-by-section installation of the boom is achieved.

Description

Technical Field

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

[0002] With the increasing installation capacity of wind turbines and the growing service life of wind turbines year by year, components of wind turbine generators need to be replaced. Since the components are very heavy and the height of the tower barrel is relatively high, a leg ship is required for replacing components of offshore wind turbines. However, using a leg ship will incur high hoisting 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 boom of the device for replacing components of an offshore wind turbine is longer than the wind turbine, has a large volume, and it is difficult to install it as a whole onto the wind turbine, requiring a large ship, with high costs and difficult installation operations. Therefore, it is necessary to provide a method for installing a boom of an offshore wind turbine. Summary of the Invention

[0004] The present invention provides a method for installing a boom of an offshore wind turbine, which realizes split-by-section installation of the boom, with convenient and fast operation.

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

[0006] A method for installing a boom of an offshore wind turbine, the boom includes a head frame, a plurality of intermediate frames and a tail frame connected in sequence, the head 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 includes a power unit, a traction rope and a tower upper support, the traction rope connects the power unit, the tower upper support and the tail frame; the installation method includes the following steps:

[0007] Provide an auxiliary hoisting mechanism, fix the auxiliary hoisting mechanism to the tower lower structure, fix the power unit to the tower lower structure, fix the tower upper support to the nacelle, connect one end of the traction rope to the power unit, and after connecting the other end to the tower upper support, extend it to the tower lower structure;

[0008] Lift the head frame with the auxiliary hoisting mechanism and hinge it to a pre-set mounting seat on the tower lower structure through the hinge mechanism;

[0009] Set up and fix a movable connection structure on the head frame, and connect the end of the traction rope extending to the tower lower structure to the connection structure;

[0010] Transfer the auxiliary hoisting mechanism to the head frame and prepare to lift the first intermediate frame;

[0011] The auxiliary hoisting mechanism hoists the first intermediate frame, connects the intermediate frame to the head frame, moves the connecting structure to the first intermediate frame and fixes it;

[0012] Transfer the auxiliary hoisting mechanism to the first intermediate frame and prepare to hoist the second intermediate frame;

[0013] Repeat the installation operation of the first intermediate frame. After sequentially connecting multiple intermediate frames and sequentially moving and fixing the connecting structure, connect the tail frame to the last intermediate frame, and move the connecting structure to the tail frame and fix it;

[0014] Remove the auxiliary hoisting mechanism to complete the installation of the boom.

[0015] Preferably, a slide rail is provided at the top of the boom. The slide rail extends linearly on the head frame, multiple intermediate frames and the tail frame. The connecting structure includes a first pulley block. A slider is provided at the bottom of the first pulley block. The slider is provided with a chute matching the slide rail. The slider is adapted to move along the slide rail. The steps for providing a movable connecting structure on the head frame include:

[0016] Provide the connecting structure, and install the first pulley block on the slide rail through the chute on the slider that matches the slide rail.

[0017] Preferably, lock holes are provided on the slide rail, and the connecting structure is fixed by setting locking pins in the lock holes to prevent the connecting structure from moving.

[0018] Preferably, the steps for moving the connecting structure include:

[0019] Detach the locking pin that prevents the connecting structure from moving from the lock hole;

[0020] Drive the connecting structure to move along the slide rail through an external driving mechanism, and at the same time, the power unit cooperates to release the towing rope;

[0021] The installed part of the boom rotates relative to the wind turbine and adaptively adjusts the pitching angle to adapt to the deviation of the moving distance of the connecting structure along the slide rail and the release length of the towing rope.

[0022] Preferably, the head frame has a first end and a second end. The hinged mechanism is arranged at the first end, and a first connection interface is arranged at the second end. The intermediate frame has a third end and a fourth end. A second connection interface and a third connection interface are respectively arranged at the third end and the fourth end. The second connection interface and the first connection interface are cooperatively connected. The structures of the third connection interface and the first connection interface are the same. The steps for connecting the intermediate frame to the head frame include:

[0023] Arrange the second connection interface in cooperation with the first connection interface, and connect the intermediate frame and the head frame through a connecting member passing through the second connection interface and the first connection interface.

[0024] Preferably, connecting a plurality of the intermediate frames in sequence includes the following steps:

[0025] Arrange the second connection interface of the latter intermediate frame in cooperation with the third connection interface of the previous intermediate frame, and connect the intermediate frames in sequence through a connecting member passing through the second connection interface and the third connection interface.

[0026] Preferably, the tail frame has a fifth end and a sixth end. A fourth connection interface is provided at the fifth end, and the lifting bracket is arranged at the sixth end. The fourth connection interface and the third connection interface are connected in cooperation to connect the tail frame and the last intermediate frame, including the following steps:

[0027] Arrange the fourth connection interface of the tail frame in cooperation with the third connection interface of the last intermediate frame, and connect the tail frame and the last intermediate frame through a connecting member passing through the fourth connection interface and the third connection interface.

[0028] Preferably, a second pulley group is provided on the upper support of the tower. One end of the towing rope is connected to the power unit, and the other end extends to the lower structure of the tower after passing around the second pulley group.

[0029] Preferably, the first pulley group includes a plurality of first pulleys arranged in sequence, the second pulley group includes a plurality of second pulleys arranged in sequence, one end of the towing rope is connected to the power unit, and the other end is connected to the second pulley group after passing around the second pulley and the first pulley multiple times.

[0030] Preferably, after completing the connection of the head frame, the intermediate frame or the tail frame, the following steps are all included:

[0031] The power unit tightens or releases the towing rope to adjust the installed part of the boom to be parallel to the horizontal plane.

[0032] Compared with the prior art, the technical solution of the embodiment of the present invention has beneficial effects.

[0033] For example, the present invention can realize the split-by-section installation of the boom without using a large ship, set a movable connection structure, and during the split-by-section installation of the boom, the movement of the connection structure is used to realize the movement of the connection point between the towing rope and the boom, and the operation is convenient and fast.

[0034] For another example, in the present invention, slide rails are arranged in a straight line on the first frame, multiple intermediate frames, and the tail frame, and sliders on the connection structure that match the slide rails are used to achieve the quick and convenient movement of the connection structure, thereby improving the installation efficiency.

[0035] For another example, connection interfaces are provided on the first frame, multiple intermediate frames, and the tail frame in the present invention, enabling convenient connection and improving the installation efficiency; the unification of the connection interfaces of the intermediate frames allows the number of intermediate frames to be adjusted according to the height of the wind turbine, with strong applicability. Description of the Drawings

[0036] Figure 1 It is a schematic diagram of the installation of the offshore wind turbine component replacement device on the wind turbine in the embodiment of the present invention;

[0037] Figure 2 It is a flowchart of the installation method of the offshore wind turbine boom in the embodiment of the present invention;

[0038] Figure 3 It is a schematic diagram of the installation of the first frame in the embodiment of the present invention;

[0039] Figure 4 It is a side view of the installation of the first frame in the embodiment of the present invention;

[0040] Figure 5 It is a schematic diagram of the installation of the connection structure on the first frame in the embodiment of the present invention;

[0041] Figure 6 It is a schematic diagram of the connection structure in the embodiment of the present invention;

[0042] Figure 7 It is a schematic diagram of the fixation of the connection structure in the embodiment of the present invention;

[0043] Figure 8 It is a schematic diagram of the installation of the first intermediate frame in the embodiment of the present invention;

[0044] Figure 9 It is a side view of the installation of the first intermediate frame in the embodiment of the present invention;

[0045] Figure 10 It is a schematic diagram of the connection of the intermediate frames in the embodiment of the present invention;

[0046] Figure 11 It is a schematic diagram of the completion of the installation of the boom in the embodiment of the present invention.

[0047] Description of the Reference Numerals:

[0048] 1. Wind turbine; 11. Structure under the tower; 12. Nacelle; 13. Tower barrel;

[0049] 2. Boom; 21. First frame; 211. First end; 212. Second end; 213. First connection joint

[0050] Mouth; 22, intermediate frame; 221, third end; 222, fourth end; 223, second connection interface; 224,

[0051] third connection interface; 23, tail frame; 24, hinge mechanism; 25, connection structure; 251, first sliding

[0052] wheel set; 252, slider; 26, slide rail; 261, lock hole; 27, lock pin; 28, connecting member; 29,

[0053] lifting bracket;

[0054] 3. Driving mechanism; 31, power unit; 32, towing rope; 33, upper tower support; 331, second pulley set;

[0055] 4. Auxiliary hoisting mechanism. Specific embodiments

[0056] To make the objectives, features, and beneficial effects of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It can be understood that the specific embodiments described below are only used to explain the present invention and are not intended to limit the present invention. Moreover, the same or similar reference numerals may be used in the drawings to refer to the same or similar elements in different embodiments, and the descriptions of the same or similar elements in different embodiments and the descriptions of existing technical elements, features, effects, etc. may also be omitted.

[0057] Refer to Figure 1 , the offshore wind turbine 1 includes a tower barrel 13, a lower tower structure 11 at the bottom of the tower barrel 13, and a nacelle 12 installed at the top of the tower barrel 13.

[0058] The 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 towing rope 32, and an upper tower support 33. The towing rope 32 connects the power unit 31, the upper tower support 33, and the boom 2; the power unit 31 tightens or releases the towing rope 32 to drive the boom 2 to rotate; the boom 2 is provided with a lifting bracket 29, and a lifting tool is provided on the lifting bracket 29; when lifting a heavy object, the lifting tool lifts the heavy object, and the power unit 31 tightens the towing rope 32 to drive the boom 2 to rotate in the direction close to the wind turbine 1 until the lifting bracket 29 reaches above the nacelle 12, and the lifting tool lowers the heavy object to the nacelle 12 for component replacement.

[0059] Refer to Figures 2 to 11 , the embodiment of the present invention provides an installation method for an offshore wind turbine boom.

[0060] Specifically, the boom 2 includes a head frame 21, a plurality of intermediate frames 22 and a tail frame 23 connected in sequence. The head frame 21 is provided with a hinge mechanism 24; the tail frame 23 is connected to the drive mechanism 3, and the towing rope 32 is connected to the power unit 31, the upper tower support 33 and the tail frame 23; the installation method includes the following steps:

[0061] S1: Provide an auxiliary lifting mechanism 4, fix the auxiliary lifting 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 towing rope 32 to the power unit 31, and after the other end is connected to the upper tower support 33, extend it to the lower tower structure 11;

[0062] S2: Lift the head frame 21 with the auxiliary lifting mechanism 4 and hinge it to the pre-set mounting seat 111 of the lower tower structure 11 through the hinge mechanism 24;

[0063] S3: Set up and fix a movable connection structure 25 on the head frame 21, and connect the end of the towing rope 32 extending to the lower tower structure 11 to the connection structure 25;

[0064] S4: Transfer the auxiliary lifting mechanism 4 to the head frame 21 and prepare to lift the first intermediate frame 22;

[0065] S5: The auxiliary lifting mechanism 4 lifts the first intermediate frame 22, connects the intermediate frame 22 to the head frame 21, and moves the connection structure 25 to the first intermediate frame 22 and fixes it;

[0066] S6: Transfer the auxiliary lifting mechanism 4 to the first intermediate frame 22 and prepare to lift the second intermediate frame;

[0067] S7: Repeat the installation operation of the first intermediate frame 22 (Steps S5 and S6). After sequentially connecting the plurality of intermediate frames 22 and sequentially moving and fixing the connection structure 25, connect the tail frame 23 to the last intermediate frame 22, and move the connection structure 25 to the tail frame 23 and fix it;

[0068] S8: Remove the auxiliary lifting mechanism 4 to complete the installation of the boom 2.

[0069] In some embodiments, a slide rail 26 is provided at the top of the boom 2. The slide rail 26 extends linearly on the head frame 21, the plurality of intermediate frames 22 and the tail frame 23. The connection structure 25 includes a first pulley block 251. A slider 252 is provided at the bottom of the first pulley block 251. The slider 252 is provided with a chute matching the slide rail 26. The slider 252 is adapted to move along the slide rail 26. Setting up a movable connection structure 25 on the head frame 21 includes the following steps:

[0070] Provide the connection structure 25 and install the first pulley block 251 on the slide rail 26 through the chute of the slider 252 matching the slide rail 26.

[0071] In some embodiments, a locking hole 261 is provided on the sliding rail 26, and a locking pin 27 is arranged in the locking hole 261 to prevent the connection structure 25 from moving so as to fix the connection structure 25.

[0072] In some embodiments, moving the connection structure 25 includes the following steps:

[0073] Detach the locking pin 27 that prevents the connection structure 25 from moving from the locking hole 261;

[0074] Drive the connection structure 25 to move along the sliding rail 26 through an external driving mechanism (not shown), and at the same time, the power unit 31 cooperates to release the towing rope 32;

[0075] The installed part of the boom 2 rotates relative to the wind turbine 1, and adaptively adjusts the pitching angle to adapt to the deviation between the moving distance of the connection structure 25 along the sliding rail 26 and the released length of the towing rope 32; compensate for the length deviation of the towing rope 32 during the movement of the connection structure 25 to avoid overloading and damaging components.

[0076] Specifically, the external driving mechanism can be a dragging winch, an electric hoist, etc., to drive the connection 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 connection structure 25, and the driving mechanism drives the meshing gear and rack to drive the connection structure 25 to move. The external driving mechanism can also be other similar mechanisms with this function, which are not limited here.

[0077] In some embodiments, the first boom 21 has a first end 211 and a second end 212. The hinged mechanism 24 is arranged at the first end 211, and a first connection interface 213 is arranged at the second end 212. The middle boom 22 has a third end 221 and a fourth end 222. A second connection interface 223 and a third connection interface 224 are respectively arranged at the third end 221 and the fourth end 222. The second connection interface 223 is cooperatively connected with the first connection interface 213, and the structures of the third connection interface 224 and the first connection interface 213 are the same. Connecting the middle boom 22 to the first boom 21 includes the following steps:

[0078] Arrange the second connection interface 223 in cooperation with the first connection interface 213, and connect the middle boom 22 to the first boom 21 through a connecting member 28 passing through the second connection interface 223 and the first connection interface 213.

[0079] In some embodiments, connecting a plurality of middle booms 22 in sequence includes the following steps:

[0080] Arrange the second connection interface 223 of the latter middle boom 22 in cooperation with the third connection interface 224 of the previous middle boom 22, and connect the middle booms 22 in sequence through a connecting member 28 passing through the second connection interface 223 and the third connection interface 224.

[0081] In some embodiments, the tailstock 23 has a fifth end and a sixth end. The fourth connection interface is provided at the fifth end, and the lifting bracket 29 is provided at the sixth end. The fourth connection interface is cooperatively connected with the third connection interface 224 to connect the tailstock 23 to the last intermediate frame 22, including the following steps:

[0082] Arrange the fourth connection interface of the tailstock 23 in cooperation with the third connection interface 224 of the last intermediate frame 22, and connect the tailstock 23 to the last intermediate frame 22 through the connecting member 28 passing through the fourth connection interface and the third connection interface 224.

[0083] Specifically, the connecting member 28 is a pin shaft or a bolt.

[0084] In some embodiments, the upper tower support 33 is provided with a second pulley group 331. One end of the towing rope 32 is connected to the power unit 31, and the other end extends to the lower tower structure 11 after passing around the second pulley group 331.

[0085] In some embodiments, the first pulley group 251 includes a plurality of first pulleys arranged in sequence, and the second pulley group 331 includes a plurality of second pulleys arranged in sequence. One end of the towing 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 pulleys and the first pulleys multiple times; reducing the load of the towing rope 32, improving safety, and increasing the service life of the towing rope 32.

[0086] In some embodiments, after the connection of the first frame 21, the intermediate frames 22 or the tailstock 23 is completed, the following steps are included:

[0087] The power unit 31 tightens or releases the towing rope 32 to adjust the installed part of the boom 2 to be parallel to the horizontal plane.

[0088] In summary, the present invention can realize the split-by-section installation of the boom 2 without using large ships, and a movable connection structure 25 is provided. During the split-by-section installation of the boom 2, the movement of the connection point between the towing rope 32 and the boom 2 is realized through the movement of the connection structure 25, and the operation is convenient and fast.

[0089] Furthermore, the present invention realizes the rapid and convenient movement of the connection structure 25 by arranging sliding rails 26 extending linearly on the first frame 21, multiple intermediate frames 22 and the tailstock 23, and using the sliding blocks 252 on the connection structure 25 that match the sliding rails 26, thereby improving the installation efficiency.

[0090] Furthermore, the present invention provides connection interfaces on the first frame 21, multiple intermediate frames 22 and the tailstock 23, which realizes the connection conveniently and improves the installation efficiency; the unification of the connection interfaces of the intermediate frames 22 enables the number of intermediate frames 22 to be adjusted according to the height of the wind turbine 1, and has strong applicability.

[0091] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even in the case where only a single embodiment is described with respect to a particular feature. The examples of features provided in the present disclosure are intended to be illustrative, not limiting, unless otherwise stated. In a specific implementation, according to actual needs and where technically feasible, the technical features of one or more dependent claims may be combined with the technical features of an independent claim, and the technical features from the corresponding independent claims may be combined in any suitable manner rather than only through the specific combinations recited 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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