A marine wind power low-frequency transformer carrying and hoisting system and a construction method

Abstract

The application discloses a marine wind power low-frequency transformer carrying and hoisting system and a construction method, and belongs to the technical field of main transformer installation of offshore booster stations. The technical scheme is as follows: the system comprises a hoisting support device, a traction and attitude control device, a transportation and positioning device and a monitoring and feedback device. The construction method comprises the steps of trial hoisting verification, hoisting to above the base, position and posture fine adjustment, slow positioning, safety and precision monitoring and the like. The application has the beneficial effects that through the cooperation of multiple devices and the whole-process digital monitoring, the integrated overall hoisting of the super-large main transformer and the one-time adjustment of the base levelness are realized. The application can effectively avoid the damage to the transformer body caused by the segmented splicing, significantly reduce the operation risk under the complex wind and wave environment of the open sea, greatly shorten the offshore installation period and reduce the construction cost, has very high safety and operation efficiency, and is particularly suitable for the transfer and installation of super-large offshore power equipment.

Description

Technical Field

[0001] This invention relates to the field of offshore substation main transformer installation technology, and in particular to an offshore wind power low-frequency transformer handling and hoisting system and construction method. Background Technology

[0002] Offshore substations are core equipment in offshore wind power projects, and the installation quality and efficiency of their main transformers directly affect the project's construction cycle and operational reliability.

[0003] Currently, the installation of large main transformers (with a single unit lifting weight exceeding 300T and a total weight exceeding 400T) in offshore substations generally faces two major technical challenges: First, the lifting operation employs segmented lifting and on-site splicing, requiring multiple adjustments to lifting points and lifting postures, resulting in a cumbersome process and potential damage to the transformer itself during splicing, posing safety hazards. Second, the leveling of the installation base is adjusted in stages and repeatedly verified, making it difficult to achieve the required accuracy in one go, necessitating multiple retests and corrections, thus extending the installation cycle and increasing labor and equipment costs. Furthermore, offshore substation sites are typically located far from the shore in deep water (e.g., 36-40m), creating a complex construction environment that further highlights the inefficiency of existing installation methods, failing to meet the high-efficiency, safe, and low-cost construction requirements of large-scale wind power projects.

[0004] Therefore, there is an urgent need for a construction method and system that can achieve one-time overall hoisting of ultra-large transformers and ensure that the base level is adjusted in one go, so as to improve construction safety and efficiency, reduce construction risks and costs, and meet the construction needs of offshore, deep water and large wind power projects. Summary of the Invention

[0005] To address the technical problems of cumbersome segmented hoisting processes, significant safety hazards, and low efficiency and difficulty in achieving the required accuracy for adjusting the level of the base in stages during the installation of large main transformers in existing offshore substations, which result in long installation cycles and high costs, this invention provides a handling and hoisting system and construction method for offshore wind power low-frequency transformers. This system enables the main transformer to be hoisted as a whole in one go and the level of the installation base to be adjusted in one go, thereby shortening the installation cycle, reducing construction costs, and improving installation safety and accuracy.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A lifting and hoisting system for offshore wind power low-frequency transformers includes a hoisting support device, a traction and attitude control device, a transportation and placement device, and a monitoring and feedback device. The hoisting support device includes a support frame and guide rails set between the dock and the barge, which are used to support and guide the ultra-large transformer to slide smoothly along the guide rails, and can withstand the weight of the transformer during transportation and the load in offshore and deep-water construction environments. The traction and attitude control device includes a hydraulic jack, a winch mechanism and at least four traction ropes, which are used to realize multi-point synchronous traction of the suspended object, fine-tuning of attitude and prevention of swaying and collision, while adapting to the disturbance of the suspended object by wind and waves in the offshore environment. The transportation and placement device includes a modular transport vehicle or sliding platform and an adjustable lifting speed controller, used to transport the lifted transformer to the installation base and make fine adjustments to ensure that the center line of the lifted object is aligned with the center line of the base and to control the levelness. The monitoring and feedback device includes an attitude sensor, a force sensor, and a monitoring terminal, which is used to monitor the hoisting height, hoisting attitude, tilt angle, and force in real time, and trigger an alarm to prompt the operator to make adjustments when the monitored parameters exceed the safety threshold.

[0007] The traction and attitude control device enables multi-point synchronous control of the suspended object by the slinger operating the traction rope, and by using hydraulic jacks and winches, achieving precise fine-tuning of longitudinal, lateral, and rotational angles.

[0008] The transport and placement device adjusts the transformer's posture and levelness through hydraulic suspension or guiding devices, and can control the lifting speed to ensure that the suspended object is placed smoothly during transport to the base, so as to achieve the centerline and adjustment of the suspended object with the horizontal plane during the transport to the base.

[0009] The monitoring and feedback device can collect real-time data on hoisting height, tilt angle, force, and ambient wind speed, and can issue an alarm signal when the data exceeds a preset threshold, prompting the operator to make adjustments, thereby monitoring the attitude and force of the hoisted object.

[0010] The offshore wind power low-frequency transformer handling and hoisting construction method based on the aforementioned system includes the following steps: S1. Trial Lifting and Verification Procedure: Slowly lift the transformer to a height of 200-300mm using the lifting support device, hold it for about 5 minutes, and use the monitoring and feedback device to check the force on the lifting support device and the traction and attitude control device, the stability of the slings and the attitude of the suspended object. If there are any abnormalities, adjust the lifting point or slings and re-test the lifting to ensure the safety and stability of the suspended object in the offshore environment. S2. Lifting to the installation base: Using the traction and attitude control device and the transportation and placement device, the load is slowly lifted to the predetermined height. At the same time, the slinger operates the traction rope to make real-time fine adjustments to the attitude of the load to prevent swaying, collision and rotation deviation. The lifting speed is optimized according to the total weight of the transformer, wind speed and windward area to achieve safe and stable lifting. S3. Position Fine-tuning Step: Using the hydraulic jacks, winch mechanism, and at least four traction ropes in the traction and attitude control device, the slinger operates to fine-tune the longitudinal, lateral, and rotational angles of the suspended object. This ensures the transformer's centerline aligns with the mounting base's centerline and controls the horizontal tilt angle to be ≤15° for the major axis and ≤10° for the minor axis, preventing excessive rotation, swaying, or tilting during lifting. (In the position fine-tuning step, the traction and attitude control device includes at least four traction ropes, a winch mechanism, and hydraulic jacks. The four corners of the suspended object are connected by traction ropes. The slinger operates the traction ropes, coordinating with the winch mechanism to adjust the rope length and lifting height, achieving fine-tuning of the longitudinal, lateral, and rotational angles. During lifting, the monitoring and feedback device collects real-time attitude data of the suspended object. When abnormal rotation, swaying, or tilting occurs, the slinger adjusts the traction ropes and winch speed based on feedback to ensure the transformer's centerline aligns with the base and maintains horizontality within design requirements.) S4. Slow lowering procedure: The transformer is first gently lowered to the pre-installation position using the transport and lowering device. Then, the slinger operates the traction rope and winch mechanism to make fine adjustments to the center line and level of the hoisted object, ensuring that the hoisted object does not collide with the base and surrounding equipment, and achieving a one-time overall hoisting and lowering. S5. Safety and Precision Monitoring Procedures: The entire process of monitoring the load, attitude, and environmental conditions is monitored through monitoring and feedback devices. When the monitored parameters exceed the safety threshold, an alarm is immediately triggered. The operator makes adjustments and continues construction to ensure that the base level meets the design requirements on the first attempt, without the need for repeated verification.

[0011] In S2, the lifting speed is controlled by a combination of the transport and placement device and the traction and attitude control device. It can be optimized according to the total weight of the transformer, wind speed and windward area to ensure smooth lifting and safe attitude.

[0012] In S3, the hydraulic jacks, winch mechanism and at least four traction ropes in the traction and attitude control device are operated by the slinger to achieve multi-point synchronous traction and attitude fine adjustment of the hoisted object, thereby keeping the hoisted object from rotating, swinging or tilting too much during the hoisting and fine adjustment process.

[0013] In S2 to S4, when the monitoring and feedback device detects an abnormal tilt angle or force on the hoisted object, it immediately triggers an alarm and suspends the hoisting operation. The operator can then adjust the slings or the attitude of the hoisted object according to the prompts and continue hoisting.

[0014] The method is applicable to the hoisting of ultra-large main transformers with a lifting weight ≥392T and a total weight ≥450T, and can be adapted to construction in offshore, deep water and complex wind and wave environments.

[0015] The system collects stress, attitude, and environmental parameters in real time throughout the hoisting process using monitoring and feedback devices, and generates data feedback and construction evaluation reports to verify hoisting accuracy and construction safety.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Significantly shorten the installation cycle and reduce cycle costs: The traditional installation method of segmented hoisting and multiple leveling adjustments requires 7-10 days for the 392T ultra-large main transformer in this project. By adopting the method of this invention, the overall hoisting and leveling of the base can be adjusted at one time, shortening the installation cycle to 2-3 days, which is more than 60% shorter. This can save costs related to labor, equipment rental, and offshore operation platforms. According to calculations, the installation of a single transformer can save approximately RMB 800,000 to RMB 1 million in cycle costs.

[0017] (2) Improve installation accuracy and equipment safety: The base level is adjusted in one go to ensure that the level deviation is controlled within L / 1000 and the center line deviation is ≤5mm, which meets the design and specification requirements and avoids equipment operation failure due to level deviation; the one-time overall hoisting avoids damage to the transformer body caused by segment splicing. At the same time, through strict inspection of hoisting tools, attitude control and "ten no hoisting" management, the hoisting safety hazard rate is reduced to 0, improving the reliability of equipment installation and subsequent operation.

[0018] (3) Adapt to complex offshore construction scenarios and improve work efficiency: In view of the characteristics of offshore booster stations being far from the shore (such as 34km in this project) and deep in water (36~40m), optimize the hoisting process and equipment selection, reduce the number of offshore operations, reduce the impact of the complex offshore environment on construction, improve work efficiency by more than 50%, and at the same time reduce the input of offshore workers, further reducing construction costs.

[0019] (4) Strong versatility and wide applicability: The method of this invention can be widely applied to wind power projects such as offshore / onshore converter stations and booster stations. It is especially suitable for the installation of ultra-large main transformers with a single hoisting weight of more than 300T, and is compatible with the needs of large equipment installation in the marine engineering and wind power industries. It has strong promotional value. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0021] Figure 1 This is a diagram of the main transformer hoisting according to an embodiment of the present invention.

[0022] Figure 2 for Figure 1 A partial view from direction A.

[0023] Figure 3 This is a diagram of the main transformer transportation system according to an embodiment of the present invention. Detailed Implementation

[0024] 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.

[0025] Example 1: Taking the Huaneng Yuhuan No. 2 offshore wind power project as an example, Example 1 describes the entire process of transporting and installing the low-frequency 220kV main transformer of the project. The transformer weighs approximately 392-415 tons and is classified as an ultra-large, high-center-of-gravity precision electrical equipment. To address the potential damage and repeated foundation verification issues associated with traditional segmented hoisting methods, this example constructs a complete offshore wind power low-frequency transformer handling and hoisting system. This system includes hoisting support devices, traction and attitude control devices, transportation and placement devices, and monitoring and feedback devices, and implements a one-time, integrated hoisting and installation process in a deep-sea environment.

[0026] In this embodiment, the hoisting support device includes a gantry crane (e.g., a gantry crane), a special lifting beam, a heavy-duty support frame, and a guide rail structure. The gantry crane is located on the dock side or the offshore work platform side to provide the hoisting power required for the overall hoisting of the main transformer. The special lifting beam is located between the hook of the gantry crane and the lifting point of the main transformer to distribute the hoisting load and maintain the balance of force on the hoisted object during the hoisting process. The heavy-duty support frame spans between the dock and the transport barge, and a guide rail structure is laid on it to support and guide the main transformer to slide and transfer smoothly along a predetermined path.

[0027] The guide rail structure is designed to work in conjunction with a modular transport vehicle or a sliding platform. The modular transport vehicle is equipped with a hydraulic suspension leveling mechanism at the bottom to adjust the attitude of the main transformer during transportation and placement. The modular transport vehicle is also equipped with stoppers and wire rope binding assemblies. The stoppers are fixed to the deck of the transport vehicle or the hull at a strong point to limit the longitudinal and lateral displacement of the main transformer. The wire rope binding assemblies are arranged in a figure-eight shape and are tensioned and fixed with flange bolts to improve stability during transportation.

[0028] The traction and attitude control device includes a winch mechanism, hydraulic jacks, and at least four traction ropes. The four traction ropes are respectively connected to the four corners of the main transformer and to the corresponding winch mechanism. By adjusting the tension length of each traction rope, the longitudinal, lateral, and rotational attitude of the main transformer can be finely adjusted. The hydraulic jacks are set at the hoisting support or transport support position to assist in adjusting the levelness and local stress state of the main transformer, so as to reduce the impact of the sea environment on the hoisting stability.

[0029] The monitoring and feedback device includes attitude sensors, force sensors, a wind speed monitoring unit, and a monitoring terminal. The attitude sensors are installed on the top of the main transformer or at the hoisting connection point to monitor the tilt angle and attitude changes of the hoisted object in real time. The force sensors are installed at the slings, winch mechanism, or hoisting connection node to monitor the stress state of the hoisting. The wind speed monitoring unit is used to collect marine environmental wind speed data in real time. The monitoring terminal communicates with each sensor to display hoisting parameters in real time and issues an alarm signal when the tilt angle, force, or environmental parameters of the hoisted object exceed a preset safety threshold.

[0030] During the overall hoisting process, the gantry crane is responsible for hoisting the main transformer as a whole, the winch mechanism and traction rope are responsible for fine-tuning the posture of the hoisted object, the hydraulic suspension leveling mechanism is responsible for adjusting the levelness during transportation and placement, and the monitoring and feedback device collects and feeds back the hoisting posture and force data in real time. All devices work together to achieve the one-time overall hoisting of the ultra-large main transformer and the one-time adjustment of the levelness of the installation base.

[0031] In the initial handling phase, the lifting support system establishes a cross-medium transfer channel by arranging heavy-duty support frames and guide rails between the dock and the barge, supporting and guiding the ultra-large transformer to slide smoothly along the guide rails. The traction and attitude control system employs hydraulic jacks, a winch mechanism, and at least four traction ropes, operated by a slinger, to achieve multi-point synchronous traction and attitude fine-tuning of the load. During the sliding unloading process, the monitoring and feedback system collects tension, force, and attitude data in real time, controlling the starting force within the safe range of sliding friction to ensure a smooth start for the load. Simultaneously, the transport barge dynamically adjusts its draft through a ballast water system to maintain a constant relative height between the dock and the barge.

[0032] After the transformer is transferred to the transportation and placement equipment, it is leveled using modular transport vehicles or sliding platforms, and longitudinal and lateral sealing is implemented according to the transformer's center of gravity coordinates to ensure stability during transportation. After being transported to the designated location at the offshore substation, the hoisting support device, in conjunction with a special lifting beam, initiates a one-time overall hoisting operation.

[0033] During the S1 trial lifting and verification stage, the transformer is slowly lifted to a height of 200-300mm and held for about 5 minutes to check the stress on the lifting equipment, the stability of the slings and the posture of the object being lifted. If any abnormalities are found, the lifting points or slings are adjusted in a timely manner.

[0034] During the S2 hoisting stage above the installation base, the load is slowly raised to the predetermined height by the traction rope and winch speed control. At the same time, the slinger makes real-time fine adjustments to the load's posture to prevent swaying, collision, and rotational deviation. The hoisting speed is optimized according to the total weight of the transformer, wind speed, and windward area to achieve safe and stable hoisting.

[0035] In the S3 position fine-tuning stage, the hydraulic jacks, winch mechanism, and at least four traction ropes in the traction and attitude control device are used by the slinger to fine-tune the longitudinal, lateral, and rotational angles of the suspended object. This ensures that the transformer's centerline is aligned with the installation base's centerline, and the horizontal tilt angle is controlled to have a major axis ≤15° and a minor axis ≤10°, ensuring that the suspended object does not rotate, swing, or tilt excessively during lifting. The monitoring and feedback device collects the suspended object's posture and force data in real time. When a deviation is detected, the slinger adjusts the traction ropes and winch speed based on the feedback to ensure precise positioning of the suspended object.

[0036] In the S4 slow lowering step, the load is first gently lowered to the pre-installation position, and then the slinger operates the traction rope and winch mechanism to make fine adjustments, precisely adjusting the center line and level of the load to ensure that it does not collide with the base and surrounding equipment, and to achieve a one-time overall hoisting and placement.

[0037] During the S5 safety and precision monitoring phase, the stress, attitude, and environmental conditions of the suspended object are monitored throughout the process via monitoring and feedback devices. When the monitored parameters exceed the safety threshold, an alarm is immediately triggered. The operator adjusts the attitude of the slings or suspended object according to the prompts and continues construction, ensuring that the base levelness meets the design requirements on the first attempt without the need for repeated verification.

[0038] During transportation and hoisting, the transformer is secured with wire ropes and stoppers to prevent longitudinal, lateral, and overturning movements. The wire ropes are arranged in a figure-eight pattern, connecting the transformer to fixed points on the bulkhead or hull, and tightened with flange bolts to ensure balanced stress. Stoppers are fixed to the two bottom corners of the transformer and to the strong stress points on the hull in the forward and backward directions, using welding or bolts for fixation. Designated personnel are responsible for inspecting the securing of the wire ropes and stoppers, and the condition of the wire ropes and stoppers is checked regularly during transportation.

[0039] Throughout the construction process, monitoring and feedback devices collected real-time data on hoisting height, hoisted object posture, tilt angle, and stress, and transmitted the data back to generate a construction evaluation report to verify construction accuracy and safety. This embodiment demonstrates the one-time overall hoisting of an ultra-large main transformer in just three days (example value, adjustable according to actual conditions). Compared to traditional segmented hoisting and multiple leveling adjustments (approximately eight days), the installation cycle is shortened by about 62.5%, saving approximately 850,000 yuan per transformer. The hoisting accuracy fully met standards, and the construction was smooth and safe, verifying the high efficiency, versatility, and safety of the method used in offshore, deep-water, and complex environments.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A system for handling and hoisting low-frequency transformers for offshore wind power, characterized in that, This includes hoisting support devices, traction and attitude control devices, transportation and placement devices, and monitoring and feedback devices; The hoisting support device includes a support frame and guide rails set between the dock and the barge, which are used to support and guide the ultra-large transformer to slide smoothly along the guide rails, and can withstand the weight of the transformer during transportation and the load in offshore and deep-water construction environments. The traction and attitude control device includes a hydraulic jack, a winch mechanism and at least four traction ropes, which are used to realize multi-point synchronous traction of the suspended object, fine-tuning of attitude and prevention of swaying and collision, while adapting to the disturbance of the suspended object by wind and waves in the offshore environment. The transportation and placement device includes a modular transport vehicle or sliding platform and an adjustable lifting speed controller, used to transport the lifted transformer to the installation base and make fine adjustments to ensure that the center line of the lifted object is aligned with the center line of the base and to control the levelness. The monitoring and feedback device includes an attitude sensor, a force sensor, and a monitoring terminal, which is used to monitor the hoisting height, hoisting attitude, tilt angle, and force in real time, and trigger an alarm to prompt the operator to make adjustments when the monitored parameters exceed the safety threshold.

2. The offshore wind power low-frequency transformer handling and hoisting system according to claim 1, characterized in that: The traction and attitude control device enables multi-point synchronous control of the suspended object by the slinger operating the traction rope, and by using hydraulic jacks and winches, achieving precise fine-tuning of longitudinal, lateral, and rotational angles.

3. The offshore wind power low-frequency transformer handling and hoisting system according to claim 2, characterized in that: The transport and placement device adjusts the transformer's posture and levelness through hydraulic suspension or guiding devices, and can control the lifting speed to ensure that the suspended object is placed smoothly during transport to the base, so as to achieve the centerline and adjustment of the suspended object with the horizontal plane during the transport to the base.

4. The offshore wind power low-frequency transformer handling and hoisting system according to claim 3, characterized in that: The monitoring and feedback device can collect real-time data on hoisting height, tilt angle, force, and ambient wind speed, and can issue an alarm signal when the data exceeds a preset threshold, prompting the operator to make adjustments, thereby monitoring the attitude and force of the hoisted object.

5. A method for handling and hoisting a low-frequency transformer for offshore wind power based on the system described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Trial Lifting and Verification Procedure: Slowly lift the transformer to a height of 200-300mm using the lifting support device, hold it for about 5 minutes, and use the monitoring and feedback device to check the force on the lifting support device and the traction and attitude control device, the stability of the slings and the attitude of the suspended object. If there are any abnormalities, adjust the lifting point or slings and re-test the lifting to ensure the safety and stability of the suspended object in the offshore environment. S2. Lifting to the installation base: Using the traction and attitude control device and the transportation and placement device, the load is slowly lifted to the predetermined height. At the same time, the slinger operates the traction rope to make real-time fine adjustments to the attitude of the load to prevent swaying, collision and rotation deviation. The lifting speed is optimized according to the total weight of the transformer, wind speed and windward area to achieve safe and stable lifting. S3. Position and posture fine-tuning steps: Through the hydraulic jacks, winch mechanism and at least four traction ropes in the traction and posture control device, the slinger operates to achieve fine-tuning of the longitudinal, lateral and rotation angles of the hoisted object, so that the center line of the transformer is aligned with the center line of the installation base, and the horizontal tilt angle is controlled to be ≤15° for the major axis and ≤10° for the minor axis, to ensure that the hoisted object does not rotate, swing or tilt excessively during the hoisting process; In the position and posture fine-tuning stage, the traction and attitude control device includes at least four traction ropes, a winch mechanism, and hydraulic jacks. The four corners of the suspended object are connected by traction ropes. The slinger operates the traction ropes and coordinates with the winch mechanism to adjust the rope length and lifting height to achieve fine-tuning of the longitudinal, lateral, and rotational angles of the suspended object. During the lifting process, the monitoring and feedback device collects the attitude data of the suspended object in real time. When abnormal rotation, swinging, or tilting occurs, the slinger adjusts the traction ropes and winch speed according to the feedback to ensure that the transformer centerline is aligned with the base and that the levelness is within the design requirements. S4. Slow lowering procedure: The transformer is first gently lowered to the pre-installation position using the transport and lowering device. Then, the slinger operates the traction rope and winch mechanism to make fine adjustments to the center line and level of the hoisted object, ensuring that the hoisted object does not collide with the base and surrounding equipment, and achieving a one-time overall hoisting and lowering. S5. Safety and Precision Monitoring Procedures: The entire process of monitoring the load, attitude, and environmental conditions is monitored through monitoring and feedback devices. When the monitored parameters exceed the safety threshold, an alarm is immediately triggered. The operator makes adjustments and continues construction to ensure that the base level meets the design requirements on the first attempt, without the need for repeated verification.

6. The handling and hoisting construction method according to claim 5, characterized in that, In S2, the lifting speed is controlled by a combination of the transport and placement device and the traction and attitude control device. It can be optimized according to the total weight of the transformer, wind speed and windward area to ensure smooth lifting and safe attitude.

7. The handling and hoisting construction method according to claim 6, characterized in that, In S3, the hydraulic jacks, winch mechanism and at least four traction ropes in the traction and attitude control device are operated by the slinger to achieve multi-point synchronous traction and attitude fine adjustment of the hoisted object, thereby keeping the hoisted object from rotating, swinging or tilting too much during the hoisting and fine adjustment process.

8. The handling and hoisting construction method according to claim 7, characterized in that, In S2 to S4, when the monitoring and feedback device detects an abnormal tilt angle or force on the hoisted object, it immediately triggers an alarm and suspends the hoisting operation. The operator can then adjust the slings or the attitude of the hoisted object according to the prompts and continue hoisting.

9. The handling and hoisting construction method according to claim 8, characterized in that, The method is applicable to the hoisting of ultra-large main transformers with a lifting weight ≥392T and a total weight ≥450T, and can be adapted to construction in offshore, deep water and complex wind and wave environments.

10. The handling and hoisting construction method according to claim 9, characterized in that, The system collects stress, attitude, and environmental parameters in real time throughout the hoisting process using monitoring and feedback devices, and generates data feedback and construction evaluation reports to verify hoisting accuracy and construction safety.

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