Blade hoisting process adopting combination of single-blade hoisting tool and blade hoisting beam

Abstract

The invention discloses a blade hoisting process combining a single-blade hoisting tool and a blade hoisting beam, relates to the technical field of mountain wind power hoisting, and aims to solve the problem that a large amount of mountain bodies need to be excavated when fan blades are hoisted in a mountain in the prior art. By adopting a staged hoisting process, long-distance blade transfer is completed by using a blade hoisting beam with light weight, and precise installation is executed by using a single-blade hoisting tool with stronger bearing capacity, so that effective separation of blade transfer and installation is realized, and the effective operation range of a main hoist under steep terrains is expanded; and the technical problem that direct hoisting cannot be realized due to insufficient working radius is successfully solved.

Description

Technical Field

[0001] This invention relates to the field of mountain wind power installation technology, and in particular to a blade installation process that combines a single-blade lifting tool and a blade lifting beam. The blade installation process is used to solve the problem that blade installation cannot be completed smoothly due to steep terrain during mountain wind power installation. Background Technology

[0002] In mountainous wind power project construction, wind turbine hoisting platforms are typically limited in area and surrounded by numerous obstacles. Therefore, single-blade hoisting tools are commonly used to hoist the blades piece by piece. However, due to steep terrain and the length limitations of the wind turbine blades, it is often impossible to construct a direct transport road to the hoisting platform, preventing the blades from being transported directly beneath it. To address this, the blades are often transported to an adjacent road below the hoisting platform, and the hoisting operation is attempted by adjusting the main crane's operating radius. However, in some extremely rugged locations, even adjusting the main crane's operating radius to its maximum limit still fails to provide the necessary operating space for single-blade hoisting. Currently, large-scale mountain excavation and blasting are commonly used to address this issue, expanding the working area to meet the hoisting radius requirements. These methods not only significantly increase project costs but also have long construction periods, potentially impacting the overall grid connection schedule. Therefore, there is an urgent need for a more economical, reasonable, and time-efficient mountainous wind turbine blade hoisting technology.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a blade lifting process that combines a single-blade lifting device and a blade lifting beam, in order to expand the effective operating range of the main crane in steep terrain.

[0005] To achieve the above objectives / to solve the above technical problems, the present invention is implemented using the following technical solution: The blade hoisting process includes the following steps: A road was built under the wind turbine hoisting platform to transport the blades, so that the wind turbine blades could be unloaded from the transport vehicle. The area between the road below the wind turbine hoisting platform and the hoisting platform was leveled to allow for temporary placement of the wind turbine blades. The main crane is positioned on the wind turbine hoisting platform. Under the premise of ensuring safety, the center of the main crane is as close as possible to the edge of the hoisting platform. After the wind turbine tower, nacelle and hub are hoisted on the wind turbine foundation, the blade lifting beam for overall hoisting is installed on the main crane hook. When the blade transport vehicle travels to the road below the wind turbine hoisting platform, calculate the horizontal distance between the center of gravity of the wind turbine blade and the center of the main hoist. This horizontal distance must not exceed the first maximum operating radius of the main hoist under the blade lifting beam hoisting condition. Unload the wind turbine blades from the transport vehicle and move the vehicle to clear the road. Calculate the second maximum working radius of the main crane under the single blade lifting condition. The main crane will lift the wind turbine blades to the site and place them on the ground. At this time, the horizontal distance between the center of gravity and the center of the main crane must be kept within the allowable range. The main crane hook removes the blade lifting beam, installs the single-blade lifting tool, and uses the single-blade lifting tool to lift the wind turbine blades to the wind turbine hub. After the installation of a single wind turbine blade is completed, repeat the above steps to install the remaining two wind turbine blades in sequence using the blade lifting beam and single blade lifting tool, thus completing the blade installation work for the entire wind turbine.

[0006] As a preferred option, the road width is 5.5m and the length of the straight section is not less than 100m.

[0007] Preferably, the site should be at least 30m long and 4m wide.

[0008] As a preferred option, the first maximum working radius of the main crane under the blade lifting beam lifting condition is 48m, which is suitable for the working conditions of an 1800t truck crane, a wind turbine blade weight of 25t, and a blade lifting beam weight of 2.5t.

[0009] As a preferred option, the allowable range refers to the horizontal distance between the center of gravity of the wind turbine blade and the center of the main hoist not exceeding the second maximum working radius of the main hoist under the single-blade lifting condition.

[0010] As a preferred option, the second maximum working radius of the main crane under the single-blade spreader lifting condition is 40m, which is suitable for a 1800t truck crane, a blade weight of 25t, and a single-blade spreader self-weight of 20t.

[0011] Preferably, when the wind turbine blades are placed on the site, their posture and position should facilitate subsequent lifting and installation using a single-blade lifting device.

[0012] As a preferred method, when repeatedly hoisting the remaining blades, the blade lifting beam is used alternately for blade transfer and the single blade lifting tool is used for final installation until all blades are hoisted.

[0013] Preferably, the blade lifting beam lifts the wind turbine blades using the first lifting strap, while the single-blade lifting device lifts the wind turbine blades using the second lifting strap. Preferably, the first and second slings are wound around the first and second lifting points of the wind turbine blades, with the first and second lifting points located on opposite sides of the center of gravity.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By employing a phased lifting process, lightweight blade lifting beams are used for long-distance blade transport, followed by precise installation using single-blade lifting equipment with greater load-bearing capacity, effectively separating blade transport and installation. This expands the effective operating range of the main crane in steep terrain, successfully solving the technical challenge of directly lifting wind turbine blades in steep mountain environments due to insufficient operating radius. Compared to traditional large-scale mountain excavation and blasting methods, this process significantly reduces civil engineering work and ecological disturbance, resulting in outstanding economic benefits. Simultaneously, relying on existing or simply constructed transport roads and small transitional areas significantly reduces the difficulty of construction organization in complex terrain conditions, effectively shortening the construction period. By breaking down the lifting task into two controllable steps—transportation and installation—the safety, adaptability, and overall reliability of the operation process are further improved, providing an efficient and reliable lifting solution for mountain wind power construction. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a plan view of the blade lifting beam hoisting arrangement of the present invention; Figure 2 This is a schematic diagram of the single-blade lifting device of the present invention; Figure 3 This is a schematic diagram of the blade lifting beam of the present invention; Figure 4 This is a plan view of the single-blade lifting device of the present invention.

[0017] In the diagram: 1. Wind turbine blade; 2. Blade lifting beam; 3. First lifting strap; 4. First lifting point; 5. Second lifting point; 6. Single blade lifting tool; 7. Second lifting strap; 8. Center of gravity; 9. Wind turbine foundation; 10. Main lifting center; 11. First maximum working radius; 12. Second maximum working radius; 13. Wind turbine lifting platform; 14. Road; 16. Site. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present application or its application or use. Example 1

[0019] This embodiment provides a blade hoisting process that combines a single-blade lifting device and a blade lifting beam.

[0020] This embodiment details the application of the technology described in this invention in a specific mountain wind farm project. This embodiment focuses on wind turbine installation in steep terrain.

[0021] The blade hoisting process specifically includes the following steps: S1. Road preparation: like Figure 1 As shown, a road 14 for transporting wind turbine blades 1 is constructed or modified at a suitable location below the wind turbine hoisting platform 13. This road 14 must meet the passage and turning requirements of large blade transport vehicles. Preferably, the road 14 has a width of not less than 5.5 meters and includes at least a straight section of not less than 100 meters in length to ensure that the blade transport vehicles can safely enter the designated position and complete the subsequent blade removal operation.

[0022] S2. Preparation of the transition area: like Figure 1 As shown, the hillside site 16 located between the wind turbine hoisting platform 13 and the road below 14 is partially leveled. This site 16 will be used as a temporary storage area for the wind turbine blades 1. The leveled site 16 should be firm and flat, with a length of not less than 30 meters and a width of not less than 4 meters to accommodate the lateral or oblique placement of the wind turbine blades 1 and to provide stable support to prevent the blades from deforming or rolling.

[0023] S3. Main crane positioning and initial installation: like Figure 1 As shown, the main crane, in this embodiment using an 1800-ton truck crane, is safely positioned on the wind turbine lifting platform 13. While ensuring the crane outriggers are under pressure, the center 10 of the main crane should be positioned as close as possible to the edge of the lifting platform 13 near the hillside to maximize its effective working radius facing downhill. The wind turbine tower, nacelle, and hub are then lifted onto the wind turbine foundation 9. A blade lifting beam 2 for lifting the wind turbine blades 1 is installed on the hook of the main crane.

[0024] S4. Unloading and Distance Verification: like Figure 1 , Figure 3 As shown, the transport vehicle carries the wind turbine blade 1 to the designated parking point on road 14. Before hoisting, a critical distance check must be performed: the horizontal projected distance between the center of gravity 8 of the wind turbine blade 1 and the center 10 of the main hoist must be calculated. This distance must be less than or equal to the first maximum operating radius 11 of the main hoist under the current counterweight and working conditions when using the blade lifting beam 2 for hoisting.

[0025] As a specific implementation parameter, under the typical working conditions of this embodiment—an 1800t truck crane, a wind turbine blade 1 weighing 25 tons, and a blade lifting beam 2 weighing 2.5 tons—the first maximum working radius 11 was determined to be 48 meters after calculation and consulting the performance table. After verification, the main crane used the blade lifting beam 2 to smoothly unload the blade 1 from the transport vehicle.

[0026] S5. Temporary storage of blades: like Figure 2 , Figure 4 As shown, after the wind turbine blade 1 is lifted off the transport vehicle, the vehicle immediately leaves the site, clearing the road 14. At this time, calculate or consult the performance table to confirm the second maximum working radius 12 of the main crane under the current working conditions when using the single-blade lifting tool 6 for lifting.

[0027] Based on the working conditions of a 25t wind turbine blade and a 20t self-weight single blade lifting device, the second maximum working radius is 40 meters.

[0028] Subsequently, the main crane operates the blade lifting beam 2 to lift the wind turbine blade 1 to a pre-leveled transition area 16 and slowly place it horizontally on the ground. The blade lifting beam 2 uses the first lifting strap 3 to lift the wind turbine blade 1. The first lifting strap 3 is wrapped around the first lifting point 4 and the second lifting point 5 on both sides of the center of gravity 8 of the wind turbine blade 1 to ensure stability during lifting. During placement, the position of the wind turbine blade must be precisely controlled to ensure that the horizontal distance between the center of gravity 8 of the blade and the center 10 of the main crane does not exceed the second maximum operating radius 12 under the single-blade lifting device 6 lifting condition. At the same time, the posture and specific position of the wind turbine blade 1 on the site 16 should be planned so that its blade root faces the wind turbine direction, and to facilitate the quick hooking and lifting of the single-blade lifting device 6. For example, wooden blocks can be placed under the blade root in advance to adjust the height and angle.

[0029] S6. Tooling Replacement and Installation: like Figure 2 , Figure 3 As shown, the main crane hook is lowered to the ground, the blade lifting beam 2 is removed, and then the single-blade lifting device 6 is installed. The main crane is operated to move the single-blade lifting device 6 above the wind turbine blade 1 in the transition area 16 and complete the gripping connection. The single-blade lifting device 6 uses the second lifting strap 7 to lift the wind turbine blade 1. The second lifting strap 7 is wrapped around the first lifting point 4 and the second lifting point 5 on both sides of the center of gravity 8 of the wind turbine blade 1 to ensure stability during lifting. Subsequently, the main crane lifts the hook, lifting the wind turbine blade 1 off the ground, completing the blade's rotation and adjustment in the air, and finally precisely installing it onto the already positioned wind turbine hub, and tightening the bolts.

[0030] S7. Repetitive tasks: After the first wind turbine blade 1 is successfully installed, steps S4 to S6 are repeated. That is, the transport vehicle delivers the second blade, the main crane is re-attached to the blade lifting beam 2, and it is lifted from road 14 to transition area 16; then the main crane is again re-attached to the single-blade lifting tool 6 to lift the second wind turbine blade onto the hub. The third wind turbine blade is installed in the same cycle. By alternately using the blade lifting beam 2 and the single-blade lifting tool 6 until all three blades are installed, the problem of blade installation in steep terrain is solved efficiently and safely. Example 2

[0031] This embodiment, based on Embodiment 1, further introduces refined construction management to improve the safety, accuracy, and efficiency of hoisting.

[0032] Transitional site reinforcement treatment: In step S2, the leveled site 16 undergoes more refined treatment. First, the site base is compacted, then a layer of gravel is laid and compacted, and finally, a large base plate or special protective pad is laid under the expected support point of the blade. This not only effectively protects the blade shell from damage caused by sharp objects or water accumulation on the ground, but also provides a solid and flat working surface for the subsequent transportation and operation of the single-blade lifting device.

[0033] The working principle of this invention is as follows: For wind turbine installation in steep terrain such as mountainous areas, firstly, a road 14 is constructed below the wind turbine installation platform 13, and the site 16 is leveled; then, the crane is positioned, and the wind turbine tower, nacelle, and hub are installed in place; next, the wind turbine blades 1 are unloaded from the crane to a predetermined position, and the first maximum operating radius 11 when using the blade lifting beam 2 and the second maximum operating radius 12 when using the single blade lifting tool 6 are calculated. The blades are transferred using the lightweight blade lifting beam 2, while the heavier single blade lifting tool 6... According to the principle of torque balance, the lighter the lifting equipment, the larger the maximum allowable lifting radius. This makes the first maximum operating radius 11 during transportation greater than the second maximum operating radius 12. The larger first maximum operating radius 11 effectively avoids a large amount of mountain excavation and blasting work when repairing the road 14, ensuring the smooth completion of the wind turbine blade 1 lifting and the safe and controllable operation of the main hoist. Finally, by repeating the transportation and lifting of the wind turbine blade 1, the overall installation of the wind turbine can be completed.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to explain the relative positional relationship and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. These terms are used only for the convenience of describing this application and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this application.

[0035] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A blade lifting process employing a combination of a single-blade lifting device and a blade lifting beam, characterized in that, Includes the following steps: A road (14) for transporting the blades is built below the wind turbine hoisting platform (13) so that the wind turbine blades (1) can be unloaded from the transport vehicle; The area (16) between the road (14) below the wind turbine hoisting platform and the hoisting platform (13) is leveled for temporary placement of the wind turbine blades (1); The main crane is positioned on the wind turbine hoisting platform (13). Under the premise of ensuring safety, the center (10) of the main crane is as close as possible to the edge of the hoisting platform (13). After the wind turbine tower, nacelle and hub are hoisted on the wind turbine foundation (9), the blade lifting beam (2) for overall hoisting is installed on the hook of the main crane. The blade transport vehicle travels to the road (14) below the wind turbine hoisting platform. The horizontal distance between the center of gravity (8) of the wind turbine blade (1) and the center of the main hoist (10) is calculated. This horizontal distance shall not exceed the first maximum working radius (11) of the main hoist under the hoisting condition of the blade lifting beam (2). Unload the wind turbine blade (1) from the transport vehicle and remove the vehicle to clear the road (14). Calculate the second maximum working radius (12) of the main crane under the single blade lifting tool (6) lifting condition. The main crane will lift the wind turbine blade (1) to the site (16) and place it on the ground. At this time, the horizontal distance between the center of gravity (8) and the center of the main crane (10) must be kept within the allowable range. The main crane hook removes the blade lifting beam (2), installs the single blade lifting tool (6), and uses the single blade lifting tool (6) to lift the wind turbine blade (1) to the wind turbine hub; After the single wind turbine blade (1) is hoisted, repeat the above steps and use the blade lifting beam (2) and single blade lifting tool (6) to hoist the remaining two wind turbine blades (1) in sequence to complete the blade hoisting work of the entire wind turbine.

2. The blade lifting process using a combination of a single-blade lifting device and a blade lifting beam as described in claim 1, characterized in that: The road (14) is 5.5m wide and the straight section is not less than 100m long.

3. The blade lifting process using a combination of single-blade lifting devices and blade lifting beams as described in claim 1, characterized in that: The length of the site (16) shall not be less than 30m and the width shall be 4m.

4. The blade lifting process using a combination of a single-blade lifting device and a blade lifting beam as described in claim 1, characterized in that: The first maximum working radius (11) of the main crane under the lifting condition of the blade lifting beam (2) is 48m, which is applicable to the working conditions of 1800t truck crane, wind turbine blade (1) weight 25t and blade lifting beam (2) self-weight 2.5t.

5. The blade lifting process using a combination of a single-blade lifting device and a blade lifting beam as described in claim 1, characterized in that: The allowable range refers to the horizontal distance between the center of gravity (8) of the wind turbine blade (1) and the center of the main hoist (10) not exceeding the second maximum working radius (12) of the main hoist under the single blade hoisting condition.

6. The blade lifting process using a combination of a single-blade lifting device and a blade lifting beam as described in claim 5, characterized in that: The second maximum working radius (12) of the main crane under the lifting condition of the single blade lifting tool (6) is 40m, which is suitable for the working condition of 1800t truck crane, blade weight 25t and single blade lifting tool (6) self-weight 20t.

7. The blade lifting process using a combination of a single-blade lifting device and a blade lifting beam as described in claim 1, characterized in that: When the wind turbine blade (1) is placed on the site (16), its posture and position should facilitate subsequent lifting and installation using a single blade lifting device (6).

8. The blade lifting process using a combination of a single-blade lifting device and a blade lifting beam as described in claim 1, characterized in that: When repeatedly hoisting the remaining blades, the blade lifting beam (2) is used alternately for blade transfer and the single blade lifting tool (6) is used for final installation until all blades are hoisted.

9. The blade lifting process using a combination of a single-blade lifting device and a blade lifting beam as described in claim 1, characterized in that: The blade lifting beam (2) lifts the wind turbine blade (1) using the first lifting strap (3), and the single blade lifting device (6) lifts the wind turbine blade (1) using the second lifting strap (7). The first sling (3) and the second sling (7) are wrapped around the first lifting point (4) and the second lifting point (5) of the fan blade (1), and the first lifting point (4) and the second lifting point (5) are located on both sides of the center of gravity (8).

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