A wind power tower multifunctional lifting platform system and a method for using the same

Abstract

The application discloses a wind power tower multifunctional lifting platform system and a use method thereof, which comprises a multifunctional lifting platform, a lifting device, a distance measuring device and a control system. The multifunctional lifting platform is arranged in the tower, the lifting device is arranged in the cabin at the top of the tower, the multifunctional lifting platform is driven by the lifting device to move up and down in the tower, and the multifunctional lifting platform can be controlled by the control system to stretch and contract along the radial direction of the tower to adapt to the inner diameter of the tower at different heights. The distance measuring device is arranged on the multifunctional lifting platform and is in communication connection with the control system. The distance between the distance measuring device and the inner wall of the tower is measured, and then the inner diameter of the tower at the current height position is obtained by the control system according to the measured distance. The stretching and contracting amount of the multifunctional lifting platform is calculated according to the inner diameter of the tower, so as to adapt to the inner diameter of the tower at different heights. The application can effectively solve the problems of difficult tower maintenance, high cost and high risk of maintenance failure of the traditional lifting machine.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine towers, and in particular to a multi-functional lifting platform system for wind turbine towers and its usage method. Background Technology

[0002] In recent years, the wind power industry has developed rapidly. Large turbines and tall towers have become the industry's recognized future development direction. Steel-concrete towers have become the most important solution for high and ultra-high towers in the wind power industry, and have been recognized by the market and have achieved rapid development.

[0003] The concrete tower in a steel-concrete tower is divided into several tower sections. The bottom concrete tower has a larger diameter, while the top concrete tower has a smaller diameter, and the overall concrete tower is truncated cone-shaped. The horizontal joints between the concrete tower sections are filled with grout. Each tower section is composed of several segments, and the vertical joints between the segments are connected by grout or bolts. The entire concrete tower is connected by externally prestressed steel strands.

[0004] During maintenance, personnel reach the wind turbine nacelle via ladders, elevators, or non-climbing devices. There are no maintenance platforms on the concrete tower section, but several maintenance platforms are provided on the steel tower section for inspecting flange connection bolts, etc.

[0005] The main problems encountered during the current maintenance are as follows:

[0006] 1) Because the concrete tower section lacks an inspection platform, it is impossible to inspect the vertical joints, horizontal joints, steel strands, and concrete cylinder walls between the ring sections.

[0007] 2) As the tower height increases, using a traditional hoist solution will increase vibration when lifting the wire rope, which will increase the probability of the wire rope getting tangled with other components; if other hoist solutions are used, such as the gear rack solution, the cost will be high and the installation quality requirements of the concrete tower will be extremely high.

[0008] 3) Each flange location in the steel tower section is equipped with a maintenance platform, which incurs significant costs. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-functional lifting platform system for wind power towers, which can effectively solve the problems of difficult tower maintenance, high cost, and high risk of failure when using traditional lifting platforms for maintenance.

[0010] Another objective of this invention is to provide a method for using a multi-functional lifting platform system for wind power towers.

[0011] The objective of this invention is achieved through the following technical solution:

[0012] A multi-functional lifting platform system for wind turbine towers is characterized by comprising a multi-functional lifting platform, a lifting device, a distance measuring device, and a control system. The multi-functional lifting platform is located inside the tower. The lifting device is located in the nacelle at the top of the tower, with its bottom connected to the multi-functional lifting platform. The lifting device drives the multi-functional lifting platform to move up and down within the tower. Under the control of the control system, the multi-functional lifting platform can extend and retract radially along the tower to adapt to different inner diameters at different tower heights. The distance measuring device is located on the multi-functional lifting platform and is communicatively connected to the control system. By measuring the distance between the distance measuring device and the inner wall of the tower, the control system determines the inner diameter of the tower at the current height position based on the measured distance. Based on the inner diameter of the tower, the extension and retraction amount of the multi-functional lifting platform is calculated to adapt to different inner diameters at different tower heights.

[0013] Furthermore, the multi-functional lifting platform includes a central frame, fixed panels, telescopic frames, telescopic power sources, mounting brackets, telescopic panels, movable panels, and guardrails. The fixed panels are installed on the central frame. There are four telescopic frames, installed around the central frame. Each telescopic frame is connected to multiple telescopic power sources. Each telescopic power source is supported on the central frame by the mounting brackets. The telescopic power sources drive the telescopic frames to extend and retract radially along the tower. Each telescopic frame has a telescopic panel installed on it. Each telescopic panel can extend and retract synchronously with its corresponding telescopic frame. The size of the telescopic panel is determined by the inner diameter of the tower and the arrangement of the telescopic frames. A guardrail is provided around the outside of each telescopic panel. The guardrail is connected to the telescopic frame and can move with the telescopic frame as it extends and retracts. The guardrail has multiple hanging points for fixing safety ropes to ensure personnel safety. Multiple telescopic panels form multiple suspended areas with the inner wall of the tower. The size of the suspended areas changes continuously as the multi-functional lifting platform rises and falls. Two of the suspended areas are reserved for a ladder and a cable tray. The remaining suspended areas are covered by movable panels to prevent personnel from falling. The size of the movable panels is larger than the largest suspended area.

[0014] Furthermore, the telescopic frame includes multiple telescopic main beams and multiple secondary beams. The multiple telescopic main beams are respectively connected to the central frame. Each telescopic main beam includes an outer telescopic main beam and an inner telescopic main beam. The inner telescopic main beam is fitted inside the outer telescopic main beam. The outer telescopic main beam is connected to the central frame. The inner telescopic main beam is connected to a telescopic power source. The telescopic power source drives the inner telescopic main beam to telescopically move within the outer telescopic main beam. The multiple secondary beams are perpendicularly connected to the multiple telescopic main beams and can move with the telescopic main beams as they telescopically extend and retract. The outer telescopic main beam, the inner telescopic main beam, and the secondary beams are each machined with multiple countersunk bolt holes for connection to the telescopic panel.

[0015] Furthermore, the central frame is the main load-bearing support component of the mobile platform, comprising multiple steel plates and multiple steel beams. The multiple steel plates are connected to form a rectangular box-shaped structure with an open top. Multiple steel beams are connected to the top opening of the rectangular box-shaped structure, and a straight ladder is provided inside the rectangular box-shaped structure to facilitate personnel to enter the interior of the central frame. The top of the straight ladder is welded or bolted to the steel beams, and the bottom is welded to the steel plates.

[0016] Furthermore, a platform guide rod is connected to the top of the central frame, and the platform guide rod is connected to the ladder slide rail on the inner wall of the tower to guide the multi-functional lifting platform to move up and down.

[0017] Furthermore, the central frame is provided with multiple lifting points for connection to the lifting device, and the number of lifting points is set according to the load conditions.

[0018] Furthermore, the fixed panel is provided with a flip-up cover for entering the interior of the central frame, and the flip-up cover is located above the straight ladder inside the central frame.

[0019] Furthermore, the telescopic panel includes an inner telescopic panel and an outer telescopic panel. The inner telescopic panel is fitted inside the outer telescopic panel, and both the inner and outer telescopic panels are provided with multiple through holes for connecting to the telescopic frame.

[0020] Another objective of this invention is achieved through the following technical solution:

[0021] A method for using a multi-functional lifting platform system for wind turbine towers, including lifting control and lowering control;

[0022] The specific steps for ascending control are as follows:

[0023] S1.1 Ensure that personnel and items are located on the fixed panel area of ​​the multi-functional lifting platform. The control system will retract the multi-functional lifting platform to its minimum state. Check the safety of the multi-functional lifting platform. After confirming safety, the control system will control the lifting device to raise the multi-functional lifting platform.

[0024] S1.2 When the height is reached, the distance between the tower and the inner wall is measured by a distance measuring device. The control system determines the inner diameter of the tower at the current height position based on the measured distance and calculates the extension and retraction of the multi-functional lifting platform based on the inner diameter of the tower.

[0025] S1.3 The control device controls the extension and deformation of the multi-functional lifting platform according to the extension amount to adapt to the inner diameter of the tower at different heights;

[0026] The specific steps for descent control are as follows:

[0027] S2.1 Ensure that personnel and items are located on the fixed panel area of ​​the multi-functional lifting platform. The control system will retract the multi-functional lifting platform to its minimum state. Check the safety of the multi-functional lifting platform. After confirming safety, the control system will control the lifting device to lower the multi-functional lifting platform.

[0028] S2.2 When the platform descends to the preset height, a distance measuring device is used to measure the distance to the inner wall of the tower. The control system determines the inner diameter of the tower at the current height position based on the measured distance, and calculates the extension and retraction of the multi-functional lifting platform based on the inner diameter of the tower.

[0029] S2.3 The control device controls the extension and deformation of the multi-functional lifting platform according to the extension amount to adapt to the inner diameter of the tower at different heights.

[0030] Furthermore, after the multi-functional lifting platform has extended and deformed, personnel can then proceed to operate the platform through its telescopic panel area.

[0031] When personnel need to operate near the suspended area of ​​the multi-functional lifting platform, the suspended area should first be covered with the movable cover plate of the multi-functional lifting platform. After the operation is completed, the movable cover plate should be removed to avoid affecting the extension and retraction of the multi-functional lifting platform.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] 1. This invention combines the functions of a maintenance platform and an elevator, which can greatly save the cost of the maintenance platform and elevator. In particular, its advantages are more obvious compared with the multi-maintenance platform of steel tower.

[0034] 2. For concrete towers, this invention enables maintenance of any part of the concrete tower, including horizontal joints, vertical joints, steel strands, and concrete cylinder walls, ensuring the safety and reliability of the concrete tower throughout its entire life cycle.

[0035] 3. For high towers, this invention uses a ladder guide combined with four steel wire ropes for lifting, which can effectively reduce steel wire rope vibration and solve the problem of severe steel wire rope vibration in traditional hoists. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the multifunctional lifting platform system of the present invention.

[0037] Figure 2 This is a structural diagram of the multifunctional lifting platform of the present invention in front of the mounting panel.

[0038] Figure 3 This is a schematic diagram of the central frame of the present invention.

[0039] Figure 4 for Figure 3A sectional view along the AA direction.

[0040] Figure 5 This is a schematic diagram of the telescopic main beam of the present invention.

[0041] Figure 6 for Figure 5 BB-direction sectional view.

[0042] Figure 7 This is a cross-sectional view of the telescopic panel of the present invention.

[0043] Figure 8 This is a schematic diagram of the platform guide rod of the present invention. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0045] Example 1:

[0046] like Figures 1 to 8 As shown, this embodiment provides a multi-functional lifting platform system for wind turbine towers, including a multi-functional lifting platform, a lifting device, a distance measuring device, and a control system. The multi-functional lifting platform is located inside the tower, and the lifting device is located in the nacelle at the top of the tower, with its bottom connected to the multi-functional lifting platform. The lifting device drives the multi-functional lifting platform to move up and down inside the tower. Under the control of the control system, the multi-functional lifting platform can extend and retract radially along the tower to adapt to different inner diameters at different tower heights. The distance measuring device 9 is a distance meter located on the multi-functional lifting platform and is communicatively connected to the control system. It is used to measure the distance between the distance measuring device 9 and the inner wall 10 of the tower. The control system has functions such as controlling the extension and retraction of the multi-functional lifting platform, controlling the lifting and lowering of the multi-functional lifting platform, and checking platform faults. It can be placed inside the central frame 1 as needed. The control system determines the inner diameter of the tower at the current height position based on the measured distance and calculates the extension and retraction amount of the multi-functional lifting platform based on the inner diameter of the tower to adapt to different inner diameters at different tower heights.

[0047] Specifically, the multi-functional lifting platform includes a central frame 1, a fixed panel 2, a telescopic frame, a telescopic power source 4, a mounting bracket 5, a telescopic panel 6, a movable panel 7, and a guardrail 8. The fixed panel 2 is installed on the central frame 1. There are four telescopic frames, which are installed around the central frame 1. Each telescopic frame is connected to multiple telescopic power sources 4. In this embodiment, the telescopic power source is preferably a hydraulic jack. Each telescopic power source 4 is supported on the central frame by the mounting bracket 5. The telescopic power source drives the telescopic frame to extend and retract radially along the tower. Each telescopic frame is equipped with a telescopic panel 6, and each telescopic panel can extend and retract synchronously with the corresponding telescopic frame. The size of the telescopic panel 6 is determined by the inner diameter of the tower and the extension... The arrangement of the telescopic frame is determined. Each telescopic panel 6 is equipped with a guardrail 8 on its outer side. The guardrail 8 is connected to the telescopic frame and can move with the telescopic frame as it extends and retracts. Multiple hanging points are provided on the guardrail 8 to fix safety ropes and ensure personnel safety. Multiple telescopic panels 6 and the inner wall of the tower form multiple suspended areas with triangular structures. The size of the suspended areas changes continuously as the multi-functional lifting platform rises and falls. Two of the suspended areas are the reserved ladder area 1202 and the cable tray area 1201. The remaining suspended areas need to be covered by movable panels 7 to prevent personnel from falling. The movable panels 7 can be rectangular in shape and placed on the top of the telescopic panels 6. The size of the movable panels 7 should be larger than the largest suspended area.

[0048] Specifically, the telescopic frame includes multiple telescopic main beams 301 and multiple secondary beams 302. The overall length of the telescopic main beams 301 is determined according to the structural form and arrangement of the tower. The cross-sectional shape of the telescopic main beams 301 is trapezoidal. The multiple telescopic main beams 301 are connected to the central frame 1 respectively. Each telescopic main beam 301 includes an outer telescopic main beam and an inner telescopic main beam. The outer telescopic main beam is welded together from a first vertical steel plate 3011 and a first horizontal beam arm 3012. The inner telescopic main beam is welded together from a second vertical steel plate 3013, a second horizontal beam arm 3014, and a third vertical steel plate 3015. The outer diameter of the second vertical steel plate 3013 and the second horizontal beam arm 3014 is slightly smaller than that of the first horizontal beam arm 3012. The inner diameter of the beam arm 3012 allows the inner telescopic main beam to be integrally fitted inside the outer telescopic main beam. The outer telescopic main beam is connected to the central frame 1 through the first vertical steel plate 3011, and a pre-drilled hole in the middle of the first vertical steel plate 3011 facilitates the installation of the telescopic power source 4. The inner telescopic main beam is connected to the telescopic power source 4 through the second vertical steel plate 3013. The telescopic power source 4 drives the inner telescopic main beam to telescopically move within the outer telescopic main beam. Multiple secondary beams 302 are vertically connected to multiple telescopic main beams 301 and can move with the telescopic main beams 301 as they telescopically extend and retract. Multiple countersunk bolt holes 3016 are machined on the outer telescopic main beam, the inner telescopic main beam, and the secondary beams for connection with the telescopic panel.

[0049] Specifically, the central frame 1 mainly comprises multiple steel plates 101 and multiple steel beams 102. The steel plates 101 are welded together to form a rectangular box-shaped structure with an open top. Multiple crisscrossing steel beams 102 are welded to the top opening of this rectangular box-shaped structure. The height of the rectangular box-shaped structure is preferably not less than 1.8 meters to facilitate personnel access to the interior of the central frame 1 for maintenance work. A straight ladder 103 is provided inside the central frame 1 for easy access. The top of the straight ladder 103 is welded or bolted to the steel beams, and the bottom is welded to the steel plates. The steel beams can be made of I-beams, H-beams, square steel, etc., and together the steel plates and steel beams form the central frame skeleton, which is also the main load-bearing support component of the mobile platform.

[0050] Specifically, a platform guide rod 11 is provided on the top of the central frame 1. One end of the platform guide rod 11 is welded to the central frame 1, and the other end is provided with a buckle groove 1101. The buckle groove is connected to the ladder slide rail on the inner wall of the tower, which plays the role of guiding the multi-functional lifting platform to move up and down.

[0051] Specifically, the central frame 1 is provided with multiple lifting points 104 for connection with the lifting device to lift the platform. The number of lifting points is set according to the load conditions.

[0052] Specifically, a flip-top 201 for entering the interior of the central frame 1 is provided on the fixed panel 2. The flip-top is located above the straight ladder inside the central frame 1. When personnel enter the interior of the central frame 1, the flip-top needs to be opened, and it is normally closed.

[0053] Specifically, the telescopic panel 6 is similar to the telescopic structure of the telescopic main beam, including an inner telescopic panel 602 and an outer telescopic panel 603. The inner telescopic panel and the outer telescopic panel are two rectangular square steels with different cross-sectional sizes. The inner telescopic panel is embedded inside the outer telescopic panel, and the inner telescopic panel and the outer telescopic panel are respectively provided with multiple through holes 601. The through holes 601 are connected to the countersunk bolt holes 3016 of the telescopic frame with round head bolts.

[0054] Specifically, the lifting device includes a lifting motor and steel wire ropes. The lifting motor is installed in the cabin and uses the steel wire ropes to lift the multi-functional lifting platform. The lifting motor is controlled by the control system, which can realize the lifting, lowering, and stopping of the multi-functional lifting platform.

[0055] During installation, the central frame 1, the telescopic main beam 301, and the secondary beam 302 are installed in the processing plant, while the remaining components, such as the panels and hydraulic jacks, are assembled on the hoisting site and then installed as a whole into the tower.

[0056] Example 2:

[0057] This embodiment provides a method for using a multi-functional lifting platform system for wind power towers, including lifting control and lowering control;

[0058] The specific steps for ascending control are as follows:

[0059] S1.1 Ensure that personnel and items are located on the fixed panel area of ​​the multi-functional lifting platform. The control system will retract the multi-functional lifting platform to its minimum state. Check the safety of the multi-functional lifting platform. After confirming safety, the control system will control the lifting device to raise the multi-functional lifting platform.

[0060] S1.2 When the height is reached, the distance between the tower and the inner wall is measured by a distance measuring device. The control system determines the inner diameter of the tower at the current height position based on the measured distance and calculates the extension and retraction of the multi-functional lifting platform based on the inner diameter of the tower.

[0061] S1.3 The control device controls the extension and deformation of the multi-functional lifting platform according to the extension amount to adapt to the inner diameter of the tower at different heights;

[0062] The specific steps for descent control are as follows:

[0063] S2.1 Ensure that personnel and items are located on the fixed panel area of ​​the multi-functional lifting platform. The control system will retract the multi-functional lifting platform to its minimum state. Check the safety of the multi-functional lifting platform. After confirming safety, the control system will control the lifting device to lower the multi-functional lifting platform.

[0064] S2.2 When the platform descends to the preset height, a distance measuring device is used to measure the distance to the inner wall of the tower. The control system determines the inner diameter of the tower at the current height position based on the measured distance, and calculates the extension and retraction of the multi-functional lifting platform based on the inner diameter of the tower.

[0065] S2.3 The control device controls the extension and deformation of the multi-functional lifting platform according to the extension amount to adapt to the inner diameter of the tower at different heights.

[0066] Specifically, after the multi-functional lifting platform has extended and deformed, personnel can then operate it in the telescopic panel area. During operation, personnel should attach the safety rope to the guardrail anchor point at all times.

[0067] When personnel need to operate near the suspended area of ​​the multi-functional lifting platform, the suspended area should first be covered with the movable cover plate of the multi-functional lifting platform. After the operation is completed, the movable cover plate should be removed to avoid affecting the extension and retraction of the multi-functional lifting platform.

[0068] In summary, this invention combines the functions of a lift and a maintenance platform. Through telescopic deformation, it can adapt to any internal diameter within the tower, allowing it to dock at any height within the tower and enabling maintenance of any part of the tower's interior. During platform operation, in the event of a power outage, the platform can be suspended at any time, allowing personnel to access the base cabin or descend to the bottom of the tower via a ladder. Once power is restored, the control system will dock the platform at the bottom of the tower.

[0069] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A multi-functional lifting platform system for wind turbine towers, characterized in that: The system includes a multi-functional lifting platform, a lifting device, a distance measuring device, and a control system. The multi-functional lifting platform is located inside the tower and includes a central frame, fixed panels, telescopic frames, telescopic power sources, mounting brackets, telescopic panels, movable panels, and guardrails. The fixed panels are mounted on the central frame. Four telescopic frames are installed around the central frame, each connected to multiple telescopic power sources. Each power source is supported on the central frame by a mounting bracket and drives the telescopic frame to extend and retract radially along the tower. Each telescopic frame has a telescopic panel installed on it, and each panel extends and retracts synchronously with its corresponding frame. The size of the telescopic panel is determined by the tower's inner diameter and the arrangement of the telescopic frames. A guardrail surrounds each panel, connected to the telescopic frame and movable as it extends and retracts. Multiple anchor points are provided on the guardrail for securing safety ropes to ensure personnel safety. Multiple telescopic panels form several suspended areas between themselves and the inner wall of the tower. The size of these suspended areas changes continuously as the multi-functional lifting platform rises and falls. Two of these suspended areas are reserved for a ladder and a cable tray, respectively. The remaining suspended areas are covered by movable panels to prevent personnel from falling, and the size of these movable panels is larger than the largest suspended area. The lifting device is located in the nacelle at the top of the tower, and its bottom is connected to the multi-functional lifting platform. The lifting device drives the multi-functional lifting platform to move up and down within the tower. Under the control of the control system, the multi-functional lifting platform can extend and retract radially along the tower to adapt to different inner diameters at different tower heights. The distance measuring device is located on the multi-functional lifting platform and is communicatively connected to the control system. By measuring the distance between the distance measuring device and the inner wall of the tower, the control system determines the inner diameter of the tower at the current height position based on the measured distance. Based on the inner diameter of the tower, the extension and retraction of the multi-functional lifting platform is calculated to adapt to different inner diameters at different tower heights.

2. The multi-functional lifting platform system for wind turbine towers according to claim 1, characterized in that: The telescopic frame includes multiple telescopic main beams and multiple secondary beams. The multiple telescopic main beams are respectively connected to the central frame. Each telescopic main beam includes an outer telescopic main beam and an inner telescopic main beam. The inner telescopic main beam is fitted inside the outer telescopic main beam. The outer telescopic main beam is connected to the central frame. The inner telescopic main beam is connected to a telescopic power source. The telescopic power source drives the inner telescopic main beam to telescopically move within the outer telescopic main beam. The multiple secondary beams are perpendicularly connected to the multiple telescopic main beams and can move with the telescopic main beams as they telescopically extend and retract. The outer telescopic main beam, the inner telescopic main beam, and the secondary beams are each machined with multiple countersunk bolt holes for connection to the telescopic panel.

3. The multi-functional lifting platform system for wind turbine towers according to claim 1, characterized in that: The central frame is the main load-bearing support component of the mobile platform, comprising multiple steel plates and multiple steel beams. The multiple steel plates are connected to form a rectangular box-shaped structure with an open top. Multiple steel beams are connected to the top opening of the rectangular box-shaped structure, and a straight ladder is provided inside the rectangular box-shaped structure to facilitate personnel to enter the interior of the central frame. The top of the straight ladder is welded or bolted to the steel beams, and the bottom is welded to the steel plates.

4. The multi-functional lifting platform system for wind turbine towers according to claim 3, characterized in that: The top of the central frame is connected to a platform guide rod, which is connected to a ladder rail on the inner wall of the tower to guide the multi-functional lifting platform to move up and down.

5. The multi-functional lifting platform system for wind turbine towers according to claim 3, characterized in that: The central frame is equipped with multiple lifting points for connecting to the lifting device. The number of lifting points is set according to the load conditions.

6. The multi-functional lifting platform system for wind turbine towers according to claim 1, characterized in that: The fixed panel is provided with a flip-up cover for entering the interior of the central frame, and the flip-up cover is located above the straight ladder inside the central frame.

7. The multi-functional lifting platform system for wind turbine towers according to claim 1, characterized in that: The telescopic panel includes an inner telescopic panel and an outer telescopic panel. The inner telescopic panel is fitted inside the outer telescopic panel, and both the inner and outer telescopic panels have multiple through holes for connecting to the telescopic frame.

8. A method of using the multi-functional lifting platform system for wind power towers as described in any one of claims 1 to 7, characterized in that, Includes up control and down control; The specific steps for ascending control are as follows: S1.1 Ensure that personnel and items are located on the fixed panel area of ​​the multi-functional lifting platform. The control system will retract the multi-functional lifting platform to its minimum state. Check the safety of the multi-functional lifting platform. After confirming safety, the control system will control the lifting device to raise the multi-functional lifting platform. S1.2 When the height is reached, the distance between the tower and the inner wall is measured by a distance measuring device. The control system determines the inner diameter of the tower at the current height position based on the measured distance and calculates the extension and retraction of the multi-functional lifting platform based on the inner diameter of the tower. S1.3 The control device controls the extension and deformation of the multi-functional lifting platform according to the extension amount to adapt to the inner diameter of the tower at different heights; The specific steps for descent control are as follows: S2.1 Ensure that personnel and items are located on the fixed panel area of ​​the multi-functional lifting platform. The control system will retract the multi-functional lifting platform to its minimum state. Check the safety of the multi-functional lifting platform. After confirming safety, the control system will control the lifting device to lower the multi-functional lifting platform. S2.2 When the platform descends to the preset height, a distance measuring device is used to measure the distance to the inner wall of the tower. The control system determines the inner diameter of the tower at the current height position based on the measured distance, and calculates the extension and retraction of the multi-functional lifting platform based on the inner diameter of the tower. S2.3 The control device controls the extension and deformation of the multi-functional lifting platform according to the extension amount to adapt to the inner diameter of the tower at different heights.

9. The method of using the multi-functional lifting platform system for wind power towers according to claim 8, characterized in that, After the multi-functional lifting platform has extended and deformed, personnel can then proceed to the telescopic panel area of ​​the multi-functional lifting platform to perform operations. When personnel need to operate near the suspended area of ​​the multi-functional lifting platform, the suspended area should first be covered with the movable cover plate of the multi-functional lifting platform. After the operation is completed, the movable cover plate should be removed to avoid affecting the extension and retraction of the multi-functional lifting platform.

Images