Construction process for reversely clamping blade by offshore wind power blade clamp

Abstract

The invention relates to the technical field of offshore wind power platform installation, and discloses an offshore wind power blade clamp reverse clamping blade construction technology which comprises the following steps that S1, a ship enters a point; step S2, carrying out leaf lightering; s3, a reverse clamping blade clamp is installed; s4, installing a reverse cable rope system; step S5, hoisting the blade; s6, the blade retreats from the deck and is aligned; and S7, the blades are hoisted and installed. According to the construction technology for reversely clamping the blade by the offshore wind power blade clamp, the blade is reversely clamped by the C-shaped clamp when the blade is lighted, a reverse wind cable system is installed for traction, and the blade is hoisted to exit from a deck and return to be positive, so that the technology of reverse lighted and air return is realized; therefore, an existing construction ship with the length of a suspension arm, the layout of a deck or the position of a crane not meeting the forward lightering requirement can complete the hoisting operation of the super-long blade, and the dependence on a few special ships is reduced.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power platform installation technology, specifically to a construction process for reverse-clamping blades using offshore wind turbine blade clamps. Background Technology

[0002] The offshore wind power industry is undergoing a critical transformation from large-scale near-shore development to large-scale deep-sea deployment. China's cumulative installed offshore wind power capacity has exceeded 35 million kilowatts, with annual new installations accounting for more than 50% of the global share for five consecutive years. The industry's scale and technological iteration speed lead the world. A key indicator of this leapfrog development is the continuous increase in the size of wind turbine units, with single-unit capacity rapidly increasing from 8MW to 26MW, and blade length breaking through from 90 meters to 150 meters.

[0003] Currently, C-clamps are commonly used for offshore wind turbine blade hoisting. However, ultra-long blades are often difficult to transfer due to the physical size of the construction vessel. Furthermore, the C-clamp release operation must be completed on the crane side, which strictly limits the direction of blade transfer to the deck to be positive. Due to the constraints of parameters such as the length of the ship's boom and the deck layout, many operating vessels cannot meet the requirements for positive transfer and hoisting, and are therefore excluded from large blade hoisting projects. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a construction process for reverse-clamping blades using a blade clamp for offshore wind turbines, thus solving the problems mentioned in the background.

[0005] This invention provides the following technical solution: a construction process for reverse-clamping blades using a clamp for offshore wind turbine blades, employing an installation vessel and a blade transport vessel, comprising the following steps:

[0006] Step S1, Vessel entry: The installation vessel uses a dynamic positioning system to enter the wind turbine location, lowers the outriggers and lifts the hull to the predetermined operating elevation; the blade transport vessel is positioned on the crane side of the installation vessel;

[0007] Step S2, blade transfer: A blade placement area and a C-clamp placement area are set up on the deck of the installation vessel. The main crane on the installation vessel holds the blade root and the auxiliary crane holds the blade tip. The two cranes work together to transfer the blade from the blade transport vessel to the blade placement area on the deck of the installation vessel.

[0008] Step S3, Install reverse blade clamping fixture: The main crane unhooks and reverses the hook to attach the C-clamp, and uses the C-clamp to clamp the blade located on the deck;

[0009] Step S4, Install the reverse guy rope system: Set up the mechanical guy rope system and the manual guy rope;

[0010] Step S5, blade lifting: The main crane is started to lift the blade, which is clamped away from the deck at a predetermined height; the auxiliary crane removes the tooling used to support the blade tip and unhooks it; the main crane continues to lift and rotates along the blade tip direction to gradually remove the blade from the deck area.

[0011] Step S6, blade exits deck and returns to center: After the blade tip extends out of the deck, the manual wind rope at the blade root is operated to change the blade attitude towards the blade root until the blade is parallel to the ship deck; then the manual wind rope at the blade tip is stressed to maintain the balance of the blade, at this time the mechanical wind rope system gradually takes over the control of the blade attitude, and then the manual wind rope is released.

[0012] Step S7, Blade hoisting and installation: The mechanical wind rope system adjusts the blade's attitude in the air, and the main crane hoists the blade to the installation position on the wind turbine hub for installation.

[0013] Preferably, in step S1, the installation vessel is a blade transport vessel, and the blade transport vessel is positioned by anchoring.

[0014] Preferably, in step S2, during the blade transfer process, the main crane and the auxiliary crane work together to keep the blade moving smoothly at a horizontal or predetermined angle.

[0015] Preferably, in step S4, the mechanical wind rope system includes a left mechanical wind rope and a right mechanical wind rope;

[0016] The left and right mechanical wind ropes are connected as follows: facing the boom direction, the left mechanical wind rope is connected to the wind rope attachment point on the C-clamp near the blade tip and located on the left side of the boom, and the right mechanical wind rope is connected to the wind rope attachment point on the C-clamp near the blade root and located on the right side of the boom.

[0017] Preferably, in step S4, the manual wind rope includes a blade root manual wind rope and a blade tip manual wind rope, which are respectively tied to the blade root lifting point and the blade tip lifting point, and are used to control the state before the blade is raised when it exits the deck and returns to its upright position.

[0018] Preferably, in step S5, the predetermined height is 2 meters.

[0019] Preferably, in step S7, the mechanical guy rope system keeps the mechanical guy rope 2-3 meters below the C-clamp during the hoisting process, so that the guy rope is in an upward angle to facilitate operation and control.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This invention uses C-shaped clamps to hold the blades in the opposite direction during blade transfer and a reverse wind rope system to pull them, lifting the blades off the deck and back to the correct position. This achieves a reverse transfer and aerial return process, which enables existing construction vessels whose boom length, deck layout, or crane position does not meet the requirements for forward transfer to complete the lifting operation of ultra-long blades, reducing the reliance on a few special-purpose vessels.

[0022] 2. This invention, by setting up a multi-safety system that combines mechanical and manual wind ropes, achieves precise and stable attitude control of the blade during its exit from the deck and its return to its normal position in the air, effectively ensuring the safety of the lifting operation of ultra-long blades. Attached Figure Description

[0023] Figure 1 This is a flowchart of the construction process for the offshore wind turbine blade clamp reverse-clamp blade of the present invention;

[0024] Figure 2 This is a layout diagram of the installation vessel and blade transport vessel for the present invention;

[0025] Figure 3 This is a diagram showing the arrangement of the C-shaped clamp of the present invention;

[0026] Figure 4 This is a schematic diagram of the C-shaped clamp structure for reverse clamping of blades according to the present invention;

[0027] Figure 5 This is a schematic diagram of the blade exit deck structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the blade straightening structure of the present invention.

[0029] In the diagram: 1. Installation vessel; 2. Blade transport vessel; 3. Blade; 4. C-clamp; 5. Main crane; 6. Auxiliary crane. Detailed Implementation

[0030] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-6 A construction process for reverse-clamping blades using a clamping device for offshore wind turbine blades includes: employing an installation vessel 1 and a blade transport vessel 2, and comprising the following steps:

[0032] Please see Figure 2Step S1, Vessel entry: Installation vessel 1 uses dynamic positioning system to enter the wind turbine position, lowers the outriggers and lifts the hull to the predetermined working elevation; Blade transport vessel 2 is positioned on the crane side of installation vessel 1;

[0033] Please see Figure 3 Step S2, Blade 3 transfer: Set up a blade 3 placement area and a C-clamp 4 placement area on the deck of the installation vessel 1. The main crane 5 on the installation vessel 1 holds the blade root of the blade 3 and the auxiliary crane 6 holds the blade tip of the blade 3. The two cranes work together to transfer the blade 3 from the blade transport vessel 2 to the blade 3 placement area on the deck of the installation vessel 1.

[0034] Please see Figure 4 Step S3, Install the reverse clamping blade 3 clamp: The main crane 5 unhooks and reverses the hook to hook the C-clamp 4, and uses the C-clamp 4 to clamp the blade 3 located on the deck;

[0035] Step S4, Install the reverse guy rope system: Set up the mechanical guy rope system and the manual guy rope;

[0036] Step S5, Lifting of blade 3: Start the main crane 5 to lift the blade 3 away from the deck at a predetermined height; the auxiliary crane 6 removes the tooling used to support the blade tip and unhooks it; the main crane 5 continues to lift and rotates along the blade tip direction to gradually remove the blade 3 from the deck area.

[0037] Please see Figure 5-6 Step S6, blade 3 exits the deck and returns to center: After the tip of blade 3 extends out of the deck, the manual wind rope at the blade root is operated to change the attitude of blade 3 towards the blade root until the blade 3 is parallel to the ship deck; then the manual wind rope at the blade tip is stressed to maintain the balance of blade 3. At this time, the mechanical wind rope system gradually takes over the control of the attitude of blade 3, and then the manual wind rope is released.

[0038] Step S7, Blade 3 hoisting and installation: The mechanical wind rope system adjusts the attitude of blade 3 in the air, and the main crane 5 hoists blade 3 to the installation position on the wind turbine hub for installation.

[0039] In step S1, the installation vessel 1 is the blade transport vessel 2, which is positioned by anchoring.

[0040] In step S2, during the transfer of blade 3, the main crane 5 and the auxiliary crane 6 work together to keep blade 3 moving smoothly at a horizontal or predetermined angle.

[0041] In step S4, the mechanical guy rope system includes a left mechanical guy rope and a right mechanical guy rope;

[0042] The connection method of the left mechanical wind rope and the right mechanical wind rope is as follows: facing the boom direction, the left mechanical wind rope is connected to the wind rope attachment point on the C-shaped clamp 4 near the blade tip and located on the left side of the boom, and the right mechanical wind rope is connected to the wind rope attachment point on the C-shaped clamp 4 near the blade root and located on the right side of the boom.

[0043] In step S4, the manual wind ropes include a blade root manual wind rope and a blade tip manual wind rope, which are respectively tied to the blade root lifting point and the blade tip lifting point, and are used to control the state of the blade 3 before it is raised when it exits the deck and returns to its upright position.

[0044] In step S5, the predetermined height is 2 meters.

[0045] In step S7, the mechanical guy rope system is kept 42 to 3 meters below the C-clamp during the hoisting process, so that the guy rope is in an upward angle to facilitate operation and control.

[0046] During construction, the vessel enters the site and takes its position. The self-elevating installation vessel 1 uses a dynamic positioning system to navigate to the target wind turbine location. After reaching the predetermined position, it lowers its outriggers and steadily lifts the installation vessel 1 to the predetermined working elevation above the sea surface, forming a stable offshore working platform. Subsequently, the blade transport vessel 2 approaches and anchors on the side of the crane of the installation vessel 1.

[0047] The blade 3 is transferred to the deck in the reverse direction. The placement area for the blade 3 and the placement area for the C-shaped clamp 4 are pre-planned on the deck of the installation vessel 1. The key to this invention is that the position of the blade 3 placement area should ensure that the blade 3 is placed in the "reverse direction" after the transfer.

[0048] The transfer operation begins: the main crane 5 on the installation vessel 1 hooks to the lifting point at the blade root, and the auxiliary crane 6 hooks to the lifting point at the blade tip. The two cranes work together to lift the blade 3 smoothly from the transport vessel 2 and place it horizontally in the blade 3 placement area on the deck of the installation vessel 1 in an "inverted" position. Supporting fixtures can be placed under the blade tip to prevent damage.

[0049] Install the reverse clamping blade 3 clamp. After the blade 3 is in place, the auxiliary crane 6 maintains the holding force, the main crane 5 removes the blade root hook and instead attaches the C-clamp 4. Operate the main crane 5 and use the C-clamp 4 to reverse clamp the blade 3. After the clamp is firmly clamped, start setting the key wind rope system.

[0050] The mechanical wind rope system is set up such that the left and right mechanical wind ropes are usually driven by the ship's winch. Facing the boom, the left mechanical wind rope is located on the left side of the boom and connected to the wind rope attachment point on the C-clamp 4 near the blade tip. The right mechanical wind rope is located on the right side of the boom and connected to the wind rope attachment point on the C-clamp 4 near the blade root. The manual wind rope is set up as an auxiliary and safety guarantee. A blade root manual wind rope is tied to the original attachment point at the blade root and a blade tip manual wind rope is tied to the blade tip. Both are operated manually.

[0051] After the guy rope system was set up, the main crane 5 began to slowly lift the blade 3, vertically lifting it about 2 meters off the deck. At this time, the auxiliary crane 6 released the hook, and the operator removed the support fixture under the blade tip. Then the auxiliary crane 6 completely unhooked, and the main crane 5 continued to lift the hook and manipulated the boom to rotate along the blade tip direction. As the boom rotated, the blade tip of the clamped blade 3 moved outward first, thus gradually "exiting" the blade 3 from the deck area.

[0052] As blade 3 returns to center in mid-air, once the tip of blade 3 is fully extended beyond the deck, the operator begins to slowly tighten the manual wind rope at the blade root. This tension will cause blade 3 to rotate around the clamp connection point toward the blade root, changing its posture. When blade 3 is pulled to be nearly parallel to the ship's deck, the manual wind rope at the blade root gradually stops bearing force, while the manual wind rope at the blade tip begins to bear force to maintain the balance of blade 3 and prevent it from swinging excessively.

[0053] During this process, the mechanical wind rope system gradually begins to bear the load. When the mechanical wind rope is fully stressed and can stably control the attitude of blade 3, the two manual wind ropes can be released. At this point, blade 3 has returned to the normal hoisting state from being fully upright in the air.

[0054] Blade 3 is hoisted and installed. After blade 3 is straightened, its attitude in the air is adjusted entirely by the mechanical wind rope system. The mechanical winch is operated to keep the wind rope about 2 to 3 meters below the C-clamp 4 when blade 3 is hoisted to the installation position, so as to ensure that the wind rope is always in an upward angle, which is convenient for fine-tuning. The main crane 5 then smoothly hoists blade 3 to the height of the wind turbine hub and connects it with the hub flange to complete the installation.

[0055] Variations and extensions:

[0056] It should be noted that the construction process of the present invention is not limited to the specific equipment and structures described in the foregoing embodiments.

[0057] In one alternative implementation, the auxiliary crane is not limited to a ship crane. Depending on the actual layout of the ship's deck and the available lifting resources, other types of lifting equipment, such as crawler cranes or truck cranes, may also be used to perform the blade tip attachment and transfer operations.

[0058] In one alternative implementation, the blade placement area is not limited to the main deck plane of the vessel. For construction vessels with Bailey bridges or other similar support frame structures installed on the deck, the blades can be transferred in reverse and temporarily placed on the Bailey bridges, followed by reverse clamping and subsequent operations.

[0059] In an alternative implementation, the connection between the mechanical wind rope system and the wind rope attachment points on the C-clamp can be adjusted. For example, the C-clamp can be equipped with multiple wind rope attachment points to adapt to different hoisting conditions and blade center of gravity, allowing the connection angle to be adaptively adjusted within a certain range.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction process for reverse-clamping blades using a blade clamp for offshore wind turbines, characterized in that, The process employs an installation vessel (1) and a blade transport vessel (2), and includes the following steps: Step S1, Vessel entry: The installation vessel (1) uses a dynamic positioning system to enter the wind turbine position, lowers the outriggers and lifts the hull to the predetermined working elevation; the blade transport vessel (2) is positioned on the crane side of the installation vessel (1); Step S2, blade (3) transfer: A blade (3) placement area and a C-clamp (4) placement area are set on the deck of the installation vessel (1). The main crane (5) on the installation vessel (1) holds the blade (3) root and the auxiliary crane (6) holds the blade (3) tip. The two cranes work together to transfer the blade (3) from the blade transport vessel (2) to the blade (3) placement area on the deck of the installation vessel (1). Step S3, install the reverse clamping blade (3) clamp: the main crane (5) unhooks and reverses the hook to hook the C-clamp (4), and uses the C-clamp (4) to clamp the blade (3) located on the deck; Step S4, Install the reverse guy rope system: Set up the mechanical guy rope system and the manual guy rope; Step S5, blade (3) lifting: Start the main crane (5) to lift the blade (3) being clamped away from the deck at a predetermined height; the auxiliary crane (6) removes the tooling used to support the blade tip and unhooks it; the main crane (5) continues to lift and rotates along the blade tip direction to gradually remove the blade (3) from the deck area; Step S6, blade (3) exits the deck and returns to center: After the blade tip of the blade (3) extends out of the deck, the manual wind rope at the blade root is operated to change the attitude of the blade (3) towards the blade root until the blade (3) is parallel to the ship deck; then the manual wind rope at the blade tip is stressed to maintain the balance of the blade (3), at this time the mechanical wind rope system gradually takes over the control of the attitude of the blade (3), and then the manual wind rope is released; Step S7, blade (3) hoisting and installation: The mechanical wind rope system adjusts the attitude of the blade (3) in the air, and the main crane (5) hoists the blade (3) to the installation position on the wind turbine hub for installation.

2. The offshore wind turbine blade clamp reverse-clamping blade construction process according to claim 1, characterized in that, In step S1, the installation vessel (1) is a blade transport vessel (2), and the blade transport vessel (2) is positioned by anchoring.

3. The offshore wind turbine blade clamp reverse-clamping blade construction process according to claim 1, characterized in that, In step S2, during the transfer of the blade (3), the main crane (5) and the auxiliary crane (6) work together to keep the blade (3) moving smoothly at a horizontal or predetermined angle.

4. The offshore wind turbine blade clamp reverse-clamping blade construction process according to claim 1, characterized in that, In step S4, the mechanical wind rope system includes a left mechanical wind rope and a right mechanical wind rope. The connection method of the left mechanical wind rope and the right mechanical wind rope is as follows: facing the direction of the boom, the left mechanical wind rope is connected to the wind rope hanging point on the C-shaped clamp (4) near the blade tip and located on the left side of the boom, and the right mechanical wind rope is connected to the wind rope hanging point on the C-shaped clamp (4) near the blade root and located on the right side of the boom.

5. The offshore wind turbine blade clamp reverse-clamping blade construction process according to claim 1, characterized in that, In step S4, the manual wind-guiding rope includes a blade root manual wind-guiding rope and a blade tip manual wind-guiding rope, which are respectively tied to the blade root lifting point and the blade tip lifting point, and are used to control the state of the blade (3) before it is raised when it exits the deck and returns to the upright position.

6. The offshore wind turbine blade clamp reverse-clamping blade construction process according to claim 1, characterized in that, In step S5, the predetermined height is 2 meters.

7. The offshore wind turbine blade clamp reverse-clamping blade construction process according to claim 1, characterized in that, In step S7, the mechanical wind rope system always keeps the mechanical wind rope 2-3 meters lower than the C-shaped clamp (4) during the hoisting process, so that the wind rope is in an upward angle state for easy operation and control.

Images