Automatic unhooking process for single-blade hoisting

Abstract

The invention discloses an automatic unhooking process for hoisting of a single blade, relates to the technical field of installation of wind power generation equipment, and aims to solve the problem of how to unhook a single blade of a wind generating set safely, efficiently and automatically after the single blade is hoisted. Appropriate hoisting equipment is selected according to the weight and size of the single blade and the installation requirement of the wind generating set, the hoisting equipment is checked and debugged, the rated hoisting capacity is larger than two times of the weight of the single blade, the automatic unhooking device is installed on the single blade and comprises an unhooking mechanism, a monitoring system, a sensor and a control unit, the sensor is calibrated, and the monitoring system is connected with the control unit. Normal communication among the control unit, the sensor and the unhooking mechanism is ensured, and the signal transmission delay does not exceed 5 milliseconds; and S2, single blade hoisting, wherein the single blade is hoisted through a crane and a hoisting tool. The automatic unhooking device has the advantages of effectively improving the stability, the safety and the hoisting efficiency of automatic unhooking when the single blade is hoisted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power equipment installation, more particularly to a single-blade hoisting automatic unhooking process. BACKGROUND

[0002] In the installation process of wind power equipment, the hoisting of single blades is a key and challenging task.

[0003] After the traditional hoisting of single blades is completed, the unhooking operation is usually completed manually by artificial means, which has many problems. First, artificial unhooking requires operators to work at high altitudes, which poses a significant safety risk, and may result in personnel casualties due to improper operation or adverse weather conditions, etc. Second, the efficiency of artificial unhooking is low, which may affect the installation progress of the entire wind turbine unit. In addition, the accuracy and reliability of artificial unhooking are difficult to guarantee, which may result in incomplete unhooking or damage to the blade due to human factors, affecting the service life and performance of the blade and the entire unit. In view of this, we propose a single-blade hoisting automatic unhooking process. SUMMARY

[0004] The purpose of the present application is to provide a single-blade hoisting automatic unhooking process, which aims to solve the problem of how to safely, efficiently and automatically unhook the single blade of a wind turbine unit after hoisting is completed.

[0005] To solve the above technical problems, the present application provides the following technical solution: a single-blade hoisting automatic unhooking process, which comprises the following steps:

[0006] S1: Hoisting preparation, select appropriate hoisting equipment according to the weight, size of the single blade and the installation requirements of the wind turbine unit, check and debug it, the rated lifting capacity is more than 2 times the weight of the single blade, install an automatic unhooking device on the single blade, the device includes an unhooking mechanism, a monitoring system, a sensor and a control unit, calibrate the sensor to ensure that the control unit communicates normally with the sensor and the unhooking mechanism, and the signal transmission delay is not more than 5 milliseconds;

[0007] S2: Hoisting of single blade, use the crane and sling to hoist the single blade, monitor the stress of the hoisting rope through the control system of the crane and the monitoring device installed on the hoisting equipment, monitor the position and attitude information of the blade through the sensor installed on the single blade and transmit it to the control unit, and when the blade reaches a certain height, fine-tune the attitude of the blade according to the pre-set program;

[0008] S3: Positioning and detection, transport the single blade to above the installation position of the wind turbine unit, detect the relative position deviation of the single blade and the installation position through the positioning sensor, and detect the contact pressure and contact state of the single blade and the installation position through the butt joint sensor;

[0009] S4: Automatic unhooking trigger, when the single blade is in place and the contact pressure and position accuracy requirements are met, the sensor sends a positioning signal to the control unit, and the control unit issues an unhooking instruction to trigger the pre-unlocking program of the unhooking mechanism;

[0010] S5: Automatic unhooking execution, after the pre-unlocking program is completed, the control unit controls the execution components of the unhooking mechanism to start the unhooking operation at a predetermined speed and sequence, and monitors the action of the unhooking mechanism and the state of the single blade through the sensor. After unhooking is completed, the unhooking mechanism sends an unhooking completion signal to the control unit, and the control unit stores and uploads the operation information to the monitoring system after confirming the successful unhooking.

[0011] Preferably, in the above step S1, the sensor includes a sensor for detecting blade position and attitude information, and after calibration, the measurement position and attitude error range is within 0.3 degrees.

[0012] Preferably, in the above step S2, during lifting, the tension of the hoisting rope is monitored in real time through the control system of the crane and the monitoring device installed on the hoisting equipment, and the rope tension deviation is not more than 3%.

[0013] Preferably, in the above step S3, the relative position deviation of the single blade and the installation position is detected by the positioning sensor, and the horizontal deviation is required to be not more than 3mm and the axial deviation is required to be not more than 3mm; the contact pressure of the single blade and the installation position is detected by the butt joint sensor, and the contact pressure is between 5000 Newton and 8000 Newton.

[0014] Preferably, in the above step S5, the unhooking instruction triggers the pre-unlocking program of the unhooking mechanism, the unhooking mechanism checks the internal locking device to ensure that the locking component can be normally unlocked, and at the same time checks the connection state between the unhooking mechanism and the lifting tool, and the error range of the connection state check is within 0.5mm.

[0015] Preferably, in the above step S5, the movement speed of the execution component of the unhooking mechanism is controlled between 5mm / s and 10mm / s, and the action of the unhooking mechanism and the state of the single blade are monitored through the sensor during the unhooking process. If an abnormal situation occurs, the control unit will pause the unhooking operation, and the abnormal situation includes that the unhooking force exceeds the set value 1000 Newton or the single blade displacement exceeds 2mm.

[0016] Preferably, the unhooking mechanism adopts a hydraulic drive mode, and the pressure fluctuation range is controlled within 0.5MPa to ensure the stability and reliability of the unhooking action.

[0017] Preferably, the control unit has data storage and analysis functions, and can record detailed data of at least 100 unhooking operations, including unhooking time, unhooking force, and single-blade posture changes, and can analyze the data to provide a basis for subsequent maintenance and optimization.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention adopts an automatic unhooking process, which avoids manual unhooking operations at high altitudes, significantly reduces the safety risks brought to operators by human and environmental factors, greatly protects the life safety of operators, and minimizes the danger of high-altitude operations.

[0020] 2. The present invention automatically completes the uncoupling operation according to a preset program, eliminating the need for manual operation of each link, greatly shortening the time required for uncoupling and making the uncoupling process after the single blade is hoisted faster, thereby speeding up the installation process of the entire wind turbine generator set, improving the overall efficiency of the installation, and saving valuable time costs for the construction of large-scale wind power generation projects.

[0021] 3. This invention utilizes precise sensors and a control unit to accurately detect the position, posture, contact pressure, and other information of individual blades, controlling the uncoupling operation according to a predetermined program and ensuring accuracy. Furthermore, by inspecting the internal locking device of the uncoupling mechanism and accurately monitoring the connection status, the reliability of the uncoupling process is ensured, preventing potential damage to the blades due to human error, improving the quality of individual blade installation, and guaranteeing the long-term stable operation of the entire wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the method of the present invention. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Example 1

[0025] like Figure 1 As shown: First, according to the weight, size and installation requirements of the single blade and the wind turbine generator set, select appropriate lifting equipment, including cranes, slings and ropes, and inspect and debug them to ensure that their rated lifting capacity is more than 2 times the weight of the single blade and their performance is good.

[0026] A dedicated automatic unhooking device is pre-installed on each blade. This device includes an unhooking mechanism, a sensor, and a control unit. The unhooking mechanism is connected to the spreader. The sensor detects the blade's installation position and posture, and the control unit receives the sensor signals and controls the unhooking mechanism.

[0027] The sensor is calibrated so that it can accurately detect the spatial position and attitude information of a single blade with an error range of less than 0.3 degrees. At the same time, it is ensured that the communication between the control unit and the sensor and decoupling mechanism is normal, and the signal transmission delay does not exceed 5 milliseconds.

[0028] Use a crane and sling to lift a single blade, and slowly lift it to a predetermined height according to the predetermined lifting route and operating specifications. During the lifting process, the crane's control system and the monitoring device installed on the lifting equipment monitor the force on the lifting rope in real time to ensure uniform force and a rope tension deviation of no more than 3%.

[0029] During the lifting process of a single blade, the sensor installed on the single blade continuously monitors the position and posture information of the blade and transmits it to the control unit. When the blade reaches a certain height, the posture of the blade is fine-tuned according to a pre-set program.

[0030] The blade is transported to the installation location above the wind turbine. Using the precise coordinates of the installation location, the crane and sling are used to precisely align the blade with the installation location. Positioning sensors installed near the installation location further monitor the relative positional deviation of the blade from the installation location, with a requirement that the horizontal deviation does not exceed 3 mm and the axial deviation does not exceed 3 mm.

[0031] When the single blade is in the correct installation position, the docking sensor installed on the single blade and the installation position detects the contact pressure and contact state between the two to ensure that the blade fits tightly with the installation position. The contact pressure is between 5000 Newtons and 8000 Newtons, indicating that the single blade is accurately in place.

[0032] When the single blade is in place and meets the contact pressure and position accuracy requirements, the sensor installed on the single blade sends a positioning signal to the control unit. After receiving the signal, the control unit determines that the single blade has met the uncoupling conditions based on the preset logic and issues an uncoupling command.

[0033] The uncoupling command first triggers the pre-unlocking procedure of the uncoupling mechanism, making the uncoupling mechanism enter the ready-to-uncoupling state. During this process, the uncoupling mechanism will check its internal locking device to ensure that all locking components can be unlocked normally. At the same time, it will check the connection status between the uncoupling mechanism and the spreader to ensure that the uncoupling process will not cause additional impact or damage to the blade.

[0034] After the pre-unlocking procedure is completed, the control unit controls the execution components of the unhooking mechanism to start the unhooking operation according to a predetermined speed and sequence. During the unhooking process, the movement speed of the unhooking mechanism is controlled between 5 mm / s and 10 mm / s to ensure smooth unhooking and avoid excessive impact on the single blade.

[0035] During the unhooking process, the action of the unhooking mechanism and the state of the single blade are continuously monitored by the sensor. If an abnormal situation occurs, such as unhooking obstruction or single blade displacement, the control unit will immediately suspend the unhooking operation and perform fault diagnosis and processing.

[0036] After the unhooking is completed, the unhooking mechanism sends an unhooking completion signal to the control unit. After the control unit confirms the successful unhooking, the operation information is stored and uploaded to the monitoring system for subsequent maintenance and management.

[0037] The embodiments of the present application are disclosed, but are not limited to the embodiments, and those skilled in the art can easily understand the spirit of the present application according to the above embodiments and make different inferences and changes, as long as they do not deviate from the spirit of the present application.

Claims

1. A single blade lifting automatic unhooking process, characterized in that: The process includes the following steps: S1: Preparation for hoisting: Select appropriate hoisting equipment based on the weight, size and installation requirements of the single blade and the wind turbine generator set, inspect and debug it, and ensure that the rated lifting capacity is more than twice the weight of the single blade. Install an automatic unhooking device on the single blade, which includes an unhooking mechanism, a monitoring system, a sensor and a control unit. Calibrate the sensor to ensure normal communication between the control unit, the sensor and the unhooking mechanism, and that the signal transmission delay does not exceed 5 milliseconds. S2: Single blade hoisting: A single blade is hoisted using a crane and a sling. The crane's control system and a monitoring device installed on the hoisting equipment monitor the force applied to the hoisting rope. Sensors installed on the blade monitor the blade's position and attitude, transmitting this information to the control unit. When the blade reaches a certain height, the blade's attitude is fine-tuned according to a pre-set program. S3: In-placement and positioning detection: transport the single blade to the installation position above the wind turbine generator set, use the positioning sensor to detect the relative position deviation between the single blade and the installation position, and use the docking sensor to detect the contact pressure and contact status between the single blade and the installation position; S4: Automatic unhooking trigger. When a single blade is in place and meets the contact pressure and position accuracy requirements, the sensor sends a positioning signal to the control unit, which issues an unhooking command to trigger the pre-unlocking procedure of the unhooking mechanism. S5: Automatic uncoupling is executed. After the pre-unlocking procedure is completed, the control unit controls the executive components of the uncoupling mechanism to start the uncoupling operation at a predetermined speed and sequence. The action of the uncoupling mechanism and the status of the single blade are monitored by sensors. After the uncoupling is completed, the uncoupling mechanism sends an uncoupling completion signal to the control unit. After confirming that the uncoupling is successful, the control unit stores the operation information and uploads it to the monitoring system.

2. The single blade lifting automatic unhooking process according to claim 1 is characterized in that: In the above step S1, the sensor includes a sensor for detecting blade position and attitude information, and after calibration, the error range of the measured position and attitude is within 0.3 degrees.

3. The single blade lifting automatic unhooking process according to claim 1 is characterized in that: In the above step S2, during the lifting process, the stress of the hoisting rope is monitored in real time through the control system of the crane and the monitoring device installed on the hoisting equipment, and the rope tension deviation does not exceed 3%.

4. The single blade lifting automatic unhooking process according to claim 1 is characterized in that: In the above step S3, the relative position deviation between the single blade and the installation position is detected by a positioning sensor, and the horizontal deviation is required to be no more than 3 mm and the axial deviation is required to be no more than 3 mm; the contact pressure between the single blade and the installation position is detected by a docking sensor, and the contact pressure is between 5000 Newtons and 8000 Newtons.

5. The single blade lifting automatic unhooking process according to claim 1 is characterized in that: In the above step S5, the unhooking instruction triggers the pre-unlocking procedure of the unhooking mechanism. The unhooking mechanism checks the internal locking device to ensure that the locking component can be unlocked normally. At the same time, it checks the connection status between the unhooking mechanism and the spreader. The error range of the connection status inspection is within 0.5 mm.

6. The single blade lifting automatic unhooking process according to claim 1 is characterized in that: In the above step S5, the movement speed of the actuator of the uncoupling mechanism is controlled between 5 mm / s and 10 mm / s. During the uncoupling process, the action of the uncoupling mechanism and the status of the single blade are monitored by sensors. If an abnormal situation occurs, the control unit will suspend the uncoupling operation. Abnormal situations include the uncoupling force exceeding the set value of 1000 Newtons or the displacement of the single blade exceeding 2 mm.

7. The single blade lifting automatic unhooking process according to claim 1 is characterized in that: The uncoupling mechanism adopts a hydraulic drive mode, and its pressure fluctuation range is controlled within 0.5MPa to ensure the stability and reliability of the uncoupling action.

8. The single blade lifting automatic unhooking process according to claim 1 is characterized in that: The control unit has data storage and analysis functions, and can record detailed data of at least 100 unhooking operations, including unhooking time, unhooking force, and single blade posture changes, and can analyze the data to provide a basis for subsequent maintenance and optimization.

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