A method for assembling offshore multi-tube jacket foundation wind turbine wharf

Abstract

This invention belongs to the field of offshore wind power foundation technology and discloses a method for assembling offshore multi-tube jacket foundation wind turbine units at a wharf. A stepped platform or a self-elevating platform is pre-constructed at the wharf corresponding to the assembly area. The stepped platform or self-elevating platform allows a mobile crane to reach the lifting height of each section of the wind turbine tower and the turbine head. After the offshore wind power multi-tube jacket foundation floats in the assembly area, the mobile crane lifts each section of the wind turbine tower and the turbine head section by section at various lifting heights. The lifting height variation range of this invention can be controlled by the number of steps on the stepped platform or the height of the self-elevating platform, avoiding the difficulties of using large lifting machinery and multi-equipment collaborative operations, effectively saving construction machinery costs, increasing the range of lifting height variation, providing good construction adaptability, and enabling streamlined construction, thus significantly saving construction time.

Description

Technical Field

[0001] This invention belongs to the field of offshore wind power foundation technology, specifically, it relates to a method for assembling offshore wind turbine generators at a wharf using a multi-tube jacket foundation. Background Technology

[0002] Current offshore wind turbine terminal assembly methods involve sectional hoisting of the tower and turbine head. However, offshore wind turbine towers can reach heights of around 100 meters, requiring a high lifting range from the cranes during hoisting, which general hoisting machinery cannot meet. Therefore, existing methods for assembling offshore wind turbines at terminals rely on large lifting machinery to reach the target height or multiple cranes working in tandem, resulting in high costs, hindering streamlined construction, and extending construction time. Thus, a more economical and convenient method for assembling offshore wind turbines with cylindrical foundations at terminals is urgently needed. Summary of the Invention

[0003] This invention addresses the technical problems related to offshore wind power terminal assembly, providing a method for assembling offshore wind turbine generator sets using multi-tube jacket foundations. A stepped platform or self-elevating platform is pre-constructed at the terminal corresponding to the assembly area, enabling hoisting machinery to reach different hoisting heights. This allows for the segmented hoisting of the wind turbine tower and turbine head. Compared to using onshore lifting machinery, this method reduces the use of construction machinery, shortens construction time, and lowers construction costs.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0005] This invention provides a method for assembling offshore wind turbine multi-tube jacket foundations at a wharf. A stepped platform or a jack-up platform is pre-constructed at the wharf corresponding to the assembly area. The stepped platform or the jack-up platform enables a mobile crane to reach the hoisting height of each section of the wind turbine tower and the wind turbine head. After the offshore wind turbine multi-tube jacket foundation floats in the assembly area, the mobile crane hoists each section of the wind turbine tower and the wind turbine head of the offshore wind turbine multi-tube jacket foundation at each hoisting height.

[0006] Furthermore, the stepped platform includes N+1 steps, which are referred to as the first step, the second step, ... the Nth step, and the highest step, from low to high; where N is the number of wind turbine tower sections; each step includes a platform section and a ramp section. The height of the platform section of each step meets the hoisting height requirements of the corresponding wind turbine tower sections and wind turbine heads. The ramp section of each step transitions from the platform section of the current step to the platform section of the next lower step. The ramp section of the first step transitions from the platform section of the first step to the dock ground.

[0007] Furthermore, the length of the platform section of each step is not less than 1.5 times the length of the mobile crane.

[0008] Furthermore, the slope of each step of the staircase is 8 to 20 degrees.

[0009] Furthermore, the assembly using the stepped platform is carried out according to the following steps:

[0010] (1) After the offshore wind turbine multi-tube jacket foundation floats on its own in the assembly water area, the offshore wind turbine multi-tube jacket foundation is pulled to the predetermined hoisting position of the first wind turbine tower and temporarily fixed.

[0011] (2) The mobile crane travels to the platform section of the first step, so that the mobile crane reaches the hoisting height of the first wind turbine tower section, and the first wind turbine tower section is hoisted on the basis of the offshore wind power multi-tube jacket;

[0012] (3) After the first section of the wind turbine tower is hoisted, the offshore wind power multi-tube jacket foundation is pulled to the predetermined hoisting position of the second section of the wind turbine tower and temporarily fixed.

[0013] (4) The mobile crane travels to the platform section of the second step, so that the mobile crane reaches the hoisting height of the second wind turbine tower, and assembles the second wind turbine tower on the first wind turbine tower.

[0014] (5) Continue in this manner until the Nth section of the wind turbine tower is installed;

[0015] (6) Pull the offshore wind turbine multi-tube jacket foundation to the predetermined hoisting position at the wind turbine head and temporarily fix it;

[0016] (7) The mobile crane travels to the platform section of the highest step, so that the mobile crane reaches the hoisting height of the wind turbine head, and the wind turbine head is hoisted on the Nth section of the wind turbine tower.

[0017] (8) After the wind turbine head is hoisted, the offshore wind power multi-tube jacket foundation wind turbine dock assembly is completed.

[0018] Furthermore, the assembly using the stepped platform is carried out according to the following steps:

[0019] (1) Multiple mobile cranes travel to the platform section of the first step, the platform section of the second step, ... the platform section of the Nth step, and the platform section of the highest step, so that each mobile crane reaches the hoisting height of the first section of the wind turbine tower, the second section of the wind turbine tower, ... the Nth section of the wind turbine tower, and the wind turbine head.

[0020] (2) After the offshore wind turbine multi-tube jacket foundation floats on its own in the assembled water area, the offshore wind turbine multi-tube jacket foundation is pulled to the predetermined hoisting position of the first wind turbine tower and temporarily fixed. The first wind turbine tower is then hoisted on the offshore wind turbine multi-tube jacket foundation.

[0021] (3) After the first section of the wind turbine tower is hoisted, the offshore wind power multi-tube jacket foundation is pulled to the predetermined hoisting position of the second section of the wind turbine tower and temporarily fixed. The second section of the wind turbine tower is then assembled on the first section of the wind turbine tower.

[0022] (4) Continue in this manner until the Nth section of the wind turbine tower is installed;

[0023] (5) Pull the offshore wind turbine multi-tube jacket foundation to the predetermined hoisting position of the wind turbine head and temporarily fix it, and hoist the wind turbine head on the Nth section of the wind turbine tower;

[0024] (8) After the wind turbine head is hoisted, the offshore wind power multi-tube jacket foundation wind turbine dock assembly is completed.

[0025] Furthermore, the assembly using the self-elevating platform is carried out according to the following steps:

[0026] (1) The offshore wind turbine multi-tube jacket foundation is temporarily fixed after it floats to the surface in the assembly water area;

[0027] (2) When the self-elevating platform is at its lowest position, level with the ground of the dock, the mobile crane travels to the self-elevating platform;

[0028] (3) Adjust the height of the self-elevating platform so that the mobile crane reaches the hoisting height of the first wind turbine tower section, and hoist the first wind turbine tower section on the basis of the offshore wind power multi-tube jacket;

[0029] (4) After the first section of the wind turbine tower is hoisted, adjust the height of the self-elevating platform so that the mobile crane reaches the hoisting height of the second section of the wind turbine tower, and hoist the second section of the wind turbine tower on the first section of the wind turbine tower.

[0030] (5) Continue in this manner until the Nth section of the wind turbine tower is installed, where N is the number of wind turbine tower sections;

[0031] (6) Adjust the height of the self-elevating platform so that the mobile crane reaches the hoisting height of the wind turbine head, and hoist the wind turbine head on the Nth section of the wind turbine tower;

[0032] (8) After the wind turbine head is hoisted, the offshore wind power multi-tube jacket foundation wind turbine dock assembly is completed.

[0033] The beneficial effects of this invention are:

[0034] This invention discloses a method for assembling offshore wind turbine generator sets at a wharf using a multi-tube jacket foundation. By pre-constructing a stepped platform or a jack-up platform at the wharf corresponding to the assembly area, a mobile crane can be moved to the stepped platform or jack-up platform to adjust the lifting height. The range of lifting height variation can be controlled by the number of steps on the stepped platform or the height of the jack-up platform, allowing for a wide range of variation and avoiding the difficulties of using large lifting machinery and coordinating multiple devices. The wind turbine generator set assembly method proposed in this invention can effectively save on construction machinery costs, increase the range of lifting height variation, has good construction adaptability, and enables streamlined construction, thus significantly saving construction time. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the assembly of a wind turbine at a wharf for an offshore wind turbine multi-tube jacket foundation provided in Embodiment 1 of the present invention;

[0036] Figure 2 for Figure 1 Top view;

[0037] Figure 3 for Figure 1 Side view;

[0038] Figure 4 This is a schematic diagram of the assembly of a wind turbine at a wharf for an offshore wind turbine multi-tube jacket foundation provided in Embodiment 2 of the present invention;

[0039] Figure 5 for Figure 2 Top view.

[0040] In the above diagram: 1. Stepped platform, 2. Mobile crane, 3. Offshore wind turbine multi-tube jacket foundation, 4. Self-elevating platform. Detailed Implementation

[0041] To further understand the invention's content, features, and effects, the following embodiments are provided, along with detailed descriptions in conjunction with the accompanying drawings:

[0042] Example 1

[0043] like Figures 1 to 3 As shown in the figure, this embodiment provides a method for assembling offshore wind turbine multi-tube jacket foundations at a wharf. A stepped platform 1 is pre-constructed at the wharf corresponding to the assembly area. The stepped platform 1 enables the mobile crane 2 to reach the hoisting height of each section of the wind turbine tower and the wind turbine head. After the offshore wind turbine multi-tube jacket foundation floats on its own in the assembly area, the mobile crane 2 hoists each section of the offshore wind turbine tower and the wind turbine head at each hoisting height.

[0044] The hoisting height refers to the height of the hook of the mobile crane 2, which is capable of lifting and installing each section of the wind turbine tower and the wind turbine head.

[0045] The stepped platform 1 consists of multiple steps, the number of which is determined by the number of wind turbine tower sections N. Each wind turbine tower section corresponds to one step, and the wind turbine head corresponds to the last step. The multiple steps of the stepped platform 1 are referred to as the first step, the second step, ... the Nth step, and the highest step, from low to high.

[0046] Each step includes a platform section and a ramp section. The platform section is used to position the mobile crane 2 at different lifting heights, and the ramp section is used to move the mobile crane 2 between different steps. The height of the platform section of each step is determined by the required lifting height of each section of the wind turbine tower and the boom height of the mobile crane 2, and its length is not less than 1.5 times the length of the mobile crane 2. The ramp section of each step transitions from the platform section of that step to the platform section of the next lower step, and the ramp section of the first step transitions from the platform section of the first step to the dock ground. The slope of the ramp section should be adjusted according to the power conditions of the mobile crane 2, generally selected within the range of 8~20°.

[0047] The stepped platform 1 can be made of steel or reinforced concrete, and its load-bearing capacity must be greater than the sum of the truck crane's own weight and its maximum lifting weight. The mobile crane 2 includes, but is not limited to, tire cranes and crawler cranes.

[0048] After the stepped platform 1 is put into use, the assembly method of the offshore wind power multi-tube jacket foundation wind turbine terminal in this embodiment shall be carried out according to the following steps:

[0049] (1) After the offshore wind turbine multi-tube jacket foundation 3 floats on its own in the assembly water area, the offshore wind turbine multi-tube jacket foundation 3 is pulled to the predetermined hoisting position of the first wind turbine tower section and fixed to the mooring pier by cables; wherein, the predetermined hoisting position of the first wind turbine tower section is the position of the platform section corresponding to the first step in the assembly water area.

[0050] (2) The mobile crane 2 travels from the ramp section of the first step of the stepped platform 1 to the platform section, so that the mobile crane 2 reaches the hoisting height of the first wind turbine tower section and hoists the first wind turbine tower section on the offshore wind power multi-tube jacket foundation 3.

[0051] (3) After the first section of the wind turbine tower is hoisted, the offshore wind turbine multi-tube jacket foundation 3 is pulled to the predetermined hoisting position of the second section of the wind turbine tower and fixed to the mooring pier by cables; wherein, the predetermined hoisting position of the second section of the wind turbine tower is the position of the platform section corresponding to the second step in the assembly water area;

[0052] (4) The mobile crane 2 travels from the ramp section of the second step of the stepped platform 1 to the platform section, so that the mobile crane 2 reaches the hoisting height of the second wind turbine tower and hoists the second wind turbine tower on the first wind turbine tower.

[0053] (5) Continue in this manner until the Nth section of the wind turbine tower is installed, where N is the number of wind turbine tower sections;

[0054] (6) Pull the offshore wind turbine multi-tube jacket foundation 3 to the predetermined hoisting position of the wind turbine head and fix it to the mooring pier with cables; wherein, the predetermined hoisting position of the wind turbine head is the position of the platform section corresponding to the highest level step in the assembly water area;

[0055] (7) The mobile crane 2 travels from the ramp section of the highest step of the stepped platform 1 to the platform section, so that the mobile crane 2 reaches the hoisting height of the wind turbine head and hoists the wind turbine head on the Nth section of the wind turbine tower.

[0056] (8) After the wind turbine head is hoisted, the offshore wind power multi-tube jacket foundation wind turbine dock assembly is completed.

[0057] Furthermore, after assembly, the mobile crane 2 on the highest-level stepped platform section of the stepped platform 1 can directly lift the offshore wind turbine multi-tube jacket foundation onto the transport ship for transportation.

[0058] As an alternative implementation, the mobile crane 2 in Embodiment 1 can be multiple, each traveling to the platform section of each step before the assembly operation, to carry out the hoisting of each section of the wind turbine tower and the wind turbine head in a continuous operation, further reducing the assembly time.

[0059] Example 2

[0060] like Figures 4 to 5 As shown, this embodiment provides a method for assembling offshore wind turbine multi-tube jacket foundations at a wharf. A self-elevating platform 4 is pre-built at the wharf corresponding to the assembly area. The self-elevating platform 4 enables the mobile crane 2 to reach the hoisting height of each section of the wind turbine tower and the wind turbine head. After the offshore wind turbine multi-tube jacket foundation floats in the assembly area, the mobile crane 2 hoists each section of the offshore wind turbine tower and the wind turbine head at each hoisting height.

[0061] The hoisting height refers to the height of the hook of the mobile crane 2, which is capable of lifting and installing each section of the wind turbine tower and the wind turbine head.

[0062] The self-elevating platform 4 can be directly selected as a self-elevating offshore platform, consisting of a superstructure (deck) and legs. The superstructure is generally a barge-shaped floating body, driven by pneumatic, hydraulic, or electric lifts, capable of rising and falling along the legs to adapt to the requirements of operations in different water depths. The maximum height of the self-elevating platform 4 should meet the maximum height required for the hoisting of the wind turbine tower.

[0063] After the self-elevating platform 4 is put into use, the assembly method of the offshore wind turbine multi-tube jacket foundation wind turbine terminal in this embodiment is carried out according to the following steps:

[0064] (1) After the offshore wind turbine multi-tube jacket foundation 3 floats on its own in the assembly water area, it is fixed to the mooring pier by cables;

[0065] (2) When the self-elevating platform 4 is at its lowest position, level with the dock floor, the mobile crane 2 travels to the self-elevating platform 4;

[0066] (3) Adjust the height of the self-elevating platform 4 so that the mobile crane 2 reaches the hoisting height of the first wind turbine tower section and hoist the first wind turbine tower section on the offshore wind power multi-tube jacket foundation 3;

[0067] (4) After the first section of the wind turbine tower is hoisted, adjust the height of the self-elevating platform 4 so that the mobile crane 2 reaches the hoisting height of the second section of the wind turbine tower and hoist the second section of the wind turbine tower on the first section of the wind turbine tower.

[0068] (5) Continue in this manner until the Nth section of the wind turbine tower is installed, where N is the number of wind turbine tower sections;

[0069] (6) Adjust the height of the self-elevating platform 4 so that the mobile crane 2 reaches the hoisting height of the wind turbine head, and hoist the wind turbine head on the Nth section of the wind turbine tower;

[0070] (8) After the wind turbine head is hoisted, the offshore wind power multi-tube jacket foundation wind turbine dock assembly is completed.

[0071] Furthermore, after assembly, the mobile crane 2 on the self-elevating platform 4 can directly lift the offshore wind turbine multi-tube jacket foundation onto the transport vessel for transportation.

[0072] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many specific modifications under the guidance of the present invention without departing from the spirit and scope of the claims, and these modifications all fall within the scope of protection of the present invention.

Claims

1. A method for assembling offshore wind turbine generators at a wharf using a multi-tube jacket foundation, characterized in that... A stepped platform is pre-constructed at the dock corresponding to the assembly area. The stepped platform enables the mobile crane to reach the hoisting height of each section of the wind turbine tower and the wind turbine head. After the offshore wind turbine multi-tube jacket foundation floats on its own in the assembly area, the mobile crane hoists each section of the offshore wind turbine multi-tube jacket foundation and the wind turbine head at each hoisting height. The stepped platform includes N+1 steps, which are referred to as the first step, the second step, ... the Nth step, and the highest step, from low to high. N is the number of wind turbine tower sections. Each step includes a platform section and a ramp section. The height of the platform section of each step meets the hoisting height requirements of the corresponding wind turbine tower sections and wind turbine heads. The ramp section of each step transitions from the platform section of the current step to the platform section of the next lower step. The ramp section of the first step transitions from the platform section of the first step to the dock ground. Assembly using the stepped platform is carried out according to the following steps: (1) After the offshore wind turbine multi-tube jacket foundation floats on its own in the assembly water area, the offshore wind turbine multi-tube jacket foundation is pulled to the predetermined hoisting position of the first wind turbine tower and temporarily fixed. (2) The mobile crane travels to the platform section of the first step, so that the mobile crane reaches the hoisting height of the first wind turbine tower section, and the first wind turbine tower section is hoisted on the basis of the offshore wind power multi-tube jacket; (3) After the first section of the wind turbine tower is hoisted, the offshore wind power multi-tube jacket foundation is pulled to the predetermined hoisting position of the second section of the wind turbine tower and temporarily fixed. (4) The mobile crane travels to the platform section of the second step, so that the mobile crane reaches the hoisting height of the second wind turbine tower, and assembles the second wind turbine tower on the first wind turbine tower. (5) Continue in this manner until the Nth section of the wind turbine tower is installed; (6) Pull the offshore wind turbine multi-tube jacket foundation to the predetermined hoisting position at the wind turbine head and temporarily fix it; (7) The mobile crane travels to the platform section of the highest step, so that the mobile crane reaches the hoisting height of the wind turbine head, and the wind turbine head is hoisted on the Nth section of the wind turbine tower. (8) After the wind turbine head is hoisted, the offshore wind power multi-tube jacket foundation wind turbine dock assembly is completed.

2. The method for assembling a wind turbine at a wharf using a multi-tube jacket foundation for offshore wind power, as described in claim 1, is characterized in that... The length of the platform section of each step shall not be less than 1.5 times the length of the mobile crane.

3. The method for assembling a wind turbine at a wharf using a multi-tube jacket foundation for offshore wind power, as described in claim 1, is characterized in that... The slope of each step of the staircase is 8 to 20 degrees.

4. A method for assembling offshore wind turbine generators at a wharf using a multi-tube jacket foundation, characterized in that... A stepped platform is pre-constructed at the dock corresponding to the assembly area. The stepped platform enables the mobile crane to reach the hoisting height of each section of the wind turbine tower and the wind turbine head. After the offshore wind turbine multi-tube jacket foundation floats on its own in the assembly area, the mobile crane hoists each section of the offshore wind turbine multi-tube jacket foundation and the wind turbine head at each hoisting height. The stepped platform includes N+1 steps, which are referred to as the first step, the second step, ... the Nth step, and the highest step, from low to high. N is the number of wind turbine tower sections. Each step includes a platform section and a ramp section. The height of the platform section of each step meets the hoisting height requirements of the corresponding wind turbine tower sections and wind turbine heads. The ramp section of each step transitions from the platform section of the current step to the platform section of the next lower step. The ramp section of the first step transitions from the platform section of the first step to the dock ground. Assembly using the stepped platform is carried out according to the following steps: (1) Multiple mobile cranes travel to the platform section of the first step, the platform section of the second step, ... the platform section of the Nth step, and the platform section of the highest step, so that each mobile crane reaches the hoisting height of the first section of the wind turbine tower, the second section of the wind turbine tower, ... the Nth section of the wind turbine tower, and the wind turbine head. (2) After the offshore wind turbine multi-tube jacket foundation floats on its own in the assembled water area, the offshore wind turbine multi-tube jacket foundation is pulled to the predetermined hoisting position of the first wind turbine tower and temporarily fixed. The first wind turbine tower is then hoisted on the offshore wind turbine multi-tube jacket foundation. (3) After the first section of the wind turbine tower is hoisted, the offshore wind power multi-tube jacket foundation is pulled to the predetermined hoisting position of the second section of the wind turbine tower and temporarily fixed. The second section of the wind turbine tower is then assembled on the first section of the wind turbine tower. (4) Continue in this manner until the Nth section of the wind turbine tower is installed; (5) Pull the offshore wind turbine multi-tube jacket foundation to the predetermined hoisting position of the wind turbine head and temporarily fix it, and hoist the wind turbine head on the Nth section of the wind turbine tower; (8) After the wind turbine head is hoisted, the offshore wind power multi-tube jacket foundation wind turbine dock assembly is completed.

5. The method for assembling a wind turbine at a wharf using a multi-tube jacket foundation for offshore wind power, as described in claim 4, is characterized in that... The length of the platform section of each step shall not be less than 1.5 times the length of the mobile crane.

6. The method for assembling a wind turbine at a wharf using a multi-tube jacket foundation for offshore wind power, as described in claim 4, is characterized in that... The slope of each step of the staircase is 8 to 20 degrees.

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