Wind turbine tower section

Abstract

The present application relates to a kind of wind power tower installation platform that can be moved up and down, belong to wind power tower installation technical field.The present application includes annular lifting platform for being set in the outer circumferential side of wind power tower, annular lifting platform is spaced apart with multiple drive mechanisms along its circumferential direction, each drive mechanism includes hydraulic push rod, hydraulic push rod can drive climbing wheel to move by moving frame, so that climbing wheel and the outer circumferential surface of wind power tower always keep the state of contact, to adapt the taper variable cross-section characteristics of wind power tower.Limiting plate and one-way transmission cooperation of limiting slot make that moving frame can only move towards the direction close to the center of annular lifting platform, when annular lifting platform accidentally slides, the counterthrust of wind power tower makes moving column try to move towards the direction away from the center of annular lifting platform, and the rigid limit of limiting plate directly blocks displacement, firmly card annular lifting platform in the outside of wind power tower, ensure the reliability of overall mechanism.

Description

Technical Field

[0001] This invention relates to a wind turbine tower installation platform that can move up and down, belonging to the field of wind turbine tower installation technology. Background Technology

[0002] Wind turbine tower installation platforms are specialized equipment designed for high-altitude assembly and maintenance of wind turbine towers. They often adopt a wraparound modular design and can move precisely up and down along the outer wall of the tower using hydraulic and mechanical transmission systems. This provides a stable support for operations and can carry construction personnel, installation tools, and tower components to complete core processes such as tower segment connection, bolt tightening, and welding.

[0003] For example, Chinese patent document CN218177369U discloses an internal platform structure for a wind turbine tower, including a wind turbine tower body. An auxiliary platform is installed on the outside of the wind turbine tower body, and the auxiliary platform consists of two parts. The two parts of the auxiliary platform are connected by an electromagnetic chuck and are rotatably connected by a hinge. A drive wheel with its outer wall in contact with the wind turbine tower body is installed inside the auxiliary platform. A gap space is formed between the outer wall of the auxiliary platform near the wind turbine tower body and the outer wall of the wind turbine tower body. A clamping plate with an arc shape adapted to the outer wall of the wind turbine tower body is provided in the gap space, and a hydraulic cylinder installed inside the auxiliary platform is provided at the inner end of the clamping plate. In implementation, firstly, the two auxiliary platforms are rotated and closed, installed on the outer wall of the wind turbine tower. Then, maintenance personnel, wearing safety harnesses, stand on the auxiliary platforms, along with maintenance tools. Next, the drive motor is started, causing the drive wheels to rotate. These wheels then move the entire auxiliary platform upwards along the outer wall of the wind turbine tower. Upon reaching the maintenance position, the drive motor is shut off, and its self-locking mechanism locks the drive wheels, completing the first limiting of the auxiliary platform. Next, the hydraulic cylinder is activated, pushing a clamping plate to the outer wall of the wind turbine tower and clamping it, increasing the friction on the auxiliary platform and achieving a second limiting. These two limiting structures ensure the auxiliary platform remains stably in the required position, guaranteeing its stability and safety. However, in actual engineering cases, wind turbine towers often adopt a conical structure to accommodate high-altitude load-bearing requirements. Their diameter gradually tapers from top to bottom, and their surface exhibits an inclined conical characteristic. The drive wheel installation structure in the above scheme does not consider how to adapt to the variable cross-sectional characteristics of the conical tower. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a wind turbine tower installation platform that can move up and down, which can better adapt to the variable cross-section characteristics of the conical tower.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a wind turbine tower installation platform that can move up and down, including an annular lifting platform for fitting around the outer periphery of the wind turbine tower. Multiple drive mechanisms are spaced apart along the circumference of the annular lifting platform. Each drive mechanism includes a climbing wheel for contacting the outer periphery of the wind turbine tower. At least one drive mechanism's climbing wheel is equipped with a drive motor, which drives the climbing wheel to rotate, enabling the annular lifting platform to move up and down along the axis of the wind turbine tower. Each drive mechanism includes a hydraulic push rod and a guide seat. The fixed end of the hydraulic push rod and the guide seat are both fixed to the annular lifting platform. The axis of the hydraulic push rod is horizontally arranged radially along the annular lifting platform. The telescopic end of the hydraulic push rod is located on the side closer to the center of the annular lifting platform relative to its fixed end. A movable frame is fixed to the telescopic end of the hydraulic push rod. The length direction of the movable frame is horizontally arranged radially along the hydraulic push rod. Two climbing wheel mounting seats are fixed on the side of the movable frame closer to the center of the annular lifting platform. The mounting bases are located at both ends of the moving frame along its length, and the two climbing wheel mounting bases are symmetrically arranged with respect to the axis of the hydraulic push rod. The climbing wheel and the climbing wheel mounting base correspond one-to-one, and the climbing wheel is rotatably mounted on the climbing wheel mounting base via the second rotating rod. The moving frame or the climbing wheel mounting base is fixedly connected to a moving column, and the moving column and the guide seat correspond one-to-one and form a sliding fit. The sliding direction of the moving column relative to the guide seat and its length direction are both parallel to the axis of the corresponding hydraulic push rod. Each moving column has multiple limiting slots spaced along its length on its side. Each moving column is provided with a limiting plate that forms a one-way transmission fit with the limiting slot. The limiting plate can slide back and forth relative to the guide seat, and the sliding direction of the limiting plate is perpendicular to the length direction of the moving column. A first spring is provided between the limiting plate and the guide seat. The return force of the first spring makes the limiting plate always locked in the limiting slot of the moving column. The one-way transmission fit between the limiting plate and the limiting slot makes the moving frame only able to move towards the center of the circular lifting platform.

[0006] To ensure a simple and reliable structure, a further preferred option is to have two drive mechanisms arranged symmetrically.

[0007] To ensure a simple, reliable structure that is easy to assemble and implement, a further preferred embodiment is that the drive mechanism is located on the upper surface of the annular lifting platform, the moving column and the climbing wheel mounting seat are fixedly connected in a one-to-one correspondence, the limit slots are located on the upper surface of the moving column, the top of the guide seat has a limit sliding hole that forms a sliding fit with the limit plate, the axis of the limit sliding hole is vertically set, the upper end of the limit plate passes through the limit sliding hole and is fixedly connected to a spring limit plate, the first spring is sleeved on the outer periphery of the limit plate, and the first spring is fixedly connected between the top surface of the guide seat and the lower surface of the spring limit plate.

[0008] To make the structure more reliable, a further preferred embodiment is that each drive mechanism includes a U-shaped rod and an anti-detachment guide rod. The opening of the U-shaped rod faces downward, and the bottom two ends of the U-shaped rod are fixedly connected to the spring limiting plate one by one. The anti-detachment guide rod is fixedly installed on the upper surface of the annular lifting platform. The axis of the anti-detachment guide rod is set vertically. The anti-detachment guide rod is set on both sides of the hydraulic push rod. The top horizontal section of the U-shaped rod has an anti-detachment guide hole for the anti-detachment guide rod to pass through. The top of the anti-detachment guide rod has an anti-detachment limiting end for limiting the upward movement of the U-shaped rod. When the U-shaped rod moves upward to the limit position, the lower end of the limiting plate is located in the limiting sliding hole.

[0009] To make the structure more reliable and reduce the risk of damage to the outer surface of the wind turbine tower, a further preferred option is to install a pressure sensor between the telescopic end of the hydraulic push rod and the moving frame to detect the force between them in the axial direction of the hydraulic push rod, and the pressure sensor and the controller of the hydraulic push rod are electrically connected.

[0010] To enhance structural reliability, a further preferred embodiment involves all drive mechanisms positioned on the upper surface of the annular lifting platform. Multiple protective mechanisms are spaced circumferentially along the lower surface of the annular lifting platform. Each protective mechanism includes a follower wheel mounting bracket, a fixed bracket, a hollow follower wheel, and a guide frame. The fixed bracket and guide frame are fixed to the lower surface of the annular lifting platform. The fixed bracket, near the center of the annular lifting platform, is connected to the follower wheel mounting bracket via a second telescopic rod. The second telescopic rod allows the follower wheel mounting bracket to reciprocate radially along the annular lifting platform. A third rotating rod is rotatably connected to the follower wheel mounting bracket. The axis of the third rotating rod is horizontally positioned and perpendicular to the direction of movement of the follower wheel mounting bracket. The third rotating rod is positioned relative to the follower wheel... The drive wheel mounting bracket can rotate around its own axis. Both ends of the third rotating rod pass through the follower wheel mounting bracket and are coaxially fixedly connected to auxiliary wheels. A fourth spring is fixedly installed between the fixed bracket and the follower wheel mounting bracket. The axis of the fourth spring is consistent with the axis of the second telescopic rod. The spring force of the fourth spring ensures that the side of the auxiliary wheel closest to the center of the annular lifting platform is always in contact with the outer circumferential surface of the wind turbine tower. The hollow follower wheel is coaxially sleeved in the middle area of ​​the third rotating rod. Both ends of the hollow follower wheel are coaxially fixed with rotating cylinders. The ends of the rotating cylinders away from the hollow follower wheel are rotatably connected to the follower wheel mounting bracket. Multiple first telescopic rods are evenly spaced along the circumference of the outer surface of the third rotating rod. The axis of the first telescopic rods is along the third rotating rod. The first telescopic rod is radially arranged, with a damping block fixedly connected to the end of the first telescopic rod away from the third rotating rod. A second spring is coaxially sleeved on the outer periphery of the first telescopic rod, with one end of the second spring fixedly connected to the third rotating rod and the other end fixedly connected to the damping block. When the second spring is in its natural state, there is a gap between the outer surface of the damping block and the inner circumferential wall of the hollow follower wheel, and the hollow follower wheel and the rotating cylinder form a rotational engagement with the third rotating rod. Guide frames are correspondingly arranged above the hollow follower wheels, and conical blocks are slidably connected to the inner wall of the guide frames. The conical blocks have a locking brake part extending towards the center of the annular lifting platform relative to the guide frames. The locking brake part has a first state of being spaced apart from the wind turbine tower, and a second state of being spaced apart from the wind turbine tower. The second state involves the wind turbine tower abutting against each other, fixing the annular lifting platform and the wind turbine tower relatively. The sliding direction of the conical block is inclined relative to the vertical direction. When the conical block moves upward relative to the guide frame, it simultaneously moves towards the center of the annular lifting platform. A third spring is fixedly connected between the bottom end of the inner wall of the guide frame and the bottom end face of the conical block. The axial direction of the third spring is consistent with the sliding direction of the conical block. A connecting rope is fixed to the outer surface of the hollow follower wheel. A temporary limiting rod is fixed to the end of the connecting rope away from the hollow follower wheel. Both the guide frame and the conical block have a limiting rod insertion hole that matches the temporary limiting rod. The guide frame has a connecting rope guide component that cooperates with the connecting rope in the outer area of ​​its limiting rod insertion hole.When the auxiliary wheel moves normally with the drive mechanism, the temporary limit rod connects simultaneously with the guide frame and the conical block, the third spring is compressed, and the locking brake of the conical block is in the first state. When the auxiliary wheel moves downward rapidly, the damping block, under the action of centrifugal force, abuts against the inner circumferential wall of the hollow follower wheel, causing the hollow follower wheel to rotate. The hollow follower wheel, through the connecting rope, drives the temporary limit rod to move, allowing the temporary limit rod to release its limiting connection with the conical block. This allows the conical block to move upward under the restoring force of the third spring, thus switching the locking brake of the conical block to the second state.

[0011] To make the structure simple and reliable, a further preferred option is that two first telescopic rods are fixed at uniform intervals along the circumference on the outer surface of the third rotating rod, and the outer end face of the damping block has an arc-shaped surface that matches the inner circumferential wall of the hollow follower wheel.

[0012] To ensure a simple and reliable structure, a further preferred option is that the axial orientation of the limit rod insertion hole on the guide frame and the axial orientation of the limit rod insertion hole on the tapered block are both horizontally arranged, and the connecting rope guide is an auxiliary ring arranged coaxially with respect to the limit rod insertion hole.

[0013] To make the structure simple and reliable, a further preferred option is that each protective mechanism includes two second telescopic rods arranged in parallel, and a fourth spring is correspondingly sleeved on the outer periphery of the second telescopic rod.

[0014] To ensure a simple, reliable, and easy-to-assemble structure, a further preferred option is that the follower wheel mounting bracket is a U-shaped mounting bracket with its opening facing away from the side of the second telescopic rod.

[0015] To ensure a simple, reliable, and easy-to-assemble structure, a further preferred embodiment is that the climbing wheel mounting base is a U-shaped frame with its opening facing away from the moving frame, and the climbing wheels are correspondingly positioned within the U-shaped frame. A first rotating rod is rotatably connected to the side of the moving frame near the center of the annular lifting platform via a rotating rod mounting base. The first rotating rod can rotate relative to the moving frame around its own axis, and the axial direction of the first rotating rod is consistent with the length direction of the moving frame. The two ends of the first rotating rod are rotatably connected to the U-shaped frame one-to-one. Two first pulleys are coaxially fixed to the outer surface of the first rotating rod, and second pulleys are coaxially fixed to the outer surface of the second rotating rod. The second pulleys correspond one-to-one with the first pulleys and are connected via belt drive within the U-shaped frame. Each drive mechanism includes a drive motor, which is fixed to one of the U-shaped frames. The output shaft of the drive motor is fixedly connected to the end of the first rotating rod near the drive motor.

[0016] To achieve a simple, reliable, and easy-to-assemble structure, a further preferred embodiment is that the annular lifting platform comprises two symmetrically arranged semi-annular platforms. The two semi-annular platforms are connected at their respective ends by a connecting assembly. Each connecting assembly includes a positioning plate, a positioning frame, and two connecting mounting brackets. The positioning plate is fixed to the upper surface of one semi-annular platform, and the positioning frame is fixed to the upper surface of the other semi-annular platform. One end of the positioning plate is horizontally inserted into the positioning frame, and the end of the positioning plate inserted into the positioning frame is connected to the positioning frame by a first bolt. The axis of the first bolt is vertically oriented, and the positioning plate has a threaded hole that matches the first bolt. The two connecting mounting brackets are correspondingly fixed to the lower surfaces of the two semi-annular platforms, and the two connecting mounting brackets are connected by multiple second bolts, the axes of which are horizontally oriented.

[0017] The beneficial effects of this invention are: 1. Each drive mechanism includes a hydraulic push rod, which drives the climbing wheel via the moving frame, ensuring that the climbing wheel and the outer circumference of the wind turbine tower remain in contact, thus adapting to the tapered variable cross-section characteristics of the wind turbine tower. The unidirectional transmission of the limit plate and limit slot ensures that the moving frame can only move towards the center of the annular lifting platform, which is equivalent to matching the upward movement of the climbing wheel. When the hydraulic push rod fails and causes the annular lifting platform to slip unexpectedly, the counter-thrust of the wind turbine tower causes the moving column to attempt to move away from the center of the annular lifting platform. However, the rigid limit of the limit plate directly blocks the displacement, firmly locking the annular lifting platform on the outside of the wind turbine tower, achieving immediate braking and ensuring the reliability of the overall mechanism.

[0018] 2. Multiple protective mechanisms are added to the lower surface of the circular lifting platform to achieve a second layer of protection. This second layer of protection utilizes a centrifugal-triggered emergency locking mechanism. When the circular lifting platform falls, the auxiliary wheel rotates at high speed, and the centrifugal force drives the damping block to move outward, causing the hollow follower wheel to rotate. This releases the temporary limit rod through the connecting rope, and the compressed third spring pushes the conical locking block to quickly embed into the gap between the circular lifting platform and the wind turbine tower. The conical locking block forms a rigid stop, preventing the fall. This dual active protection and fault-triggered design does not rely on manual intervention and can still respond quickly in extreme fault conditions, better eliminating the risk of falls from heights and building a solid double line of defense for the safety of workers and equipment.

[0019] 3. Through the control mechanism of hydraulic push rod and pressure sensor, the clamping force of the climbing wheel on the wind turbine tower is monitored in real time, the clamping force threshold deviation is accurately identified, and the extension and retraction of the hydraulic push rod is automatically and dynamically adjusted. This not only avoids climbing slippage caused by insufficient clamping force, but also prevents damage to the surface of the wind turbine tower due to overload of clamping force. It is also adapted to the variable cross-section characteristics of the conical tower to ensure a smooth and reliable climbing process. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention during its implementation; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the split structure of the two semi-ring platforms of the present invention; Figure 4 This is a three-dimensional structural diagram of the hydraulic push rod and the movable frame of the present invention; Figure 5 This is a schematic diagram of the internal structure of the climbing wheel mounting base of the present invention; Figure 6 This is a schematic diagram showing the disassembled structure of the guide seat and the limiting plate of the present invention; Figure 7 This is a three-dimensional structural diagram of the follower wheel mounting bracket and fixing bracket of the present invention; Figure 8 This is a schematic diagram of the internal structure of the hollow follower wheel in this invention; Figure 9 This is a three-dimensional structural diagram of the third rotating rod and damping block of the present invention; Figure 10 This is a three-dimensional structural diagram of the guide frame and the conical block of the present invention; Figure 11 This is a schematic diagram showing the disassembled structure of the guide frame and the conical card block of the present invention.

[0021] The components in the diagram are labeled as follows: 1. Semi-ring platform; 11. Guardrail; 2. Drive mechanism; 21. Hydraulic push rod; 22. Moving frame; 23. Climbing wheel mounting base; 24. First rotating rod; 25. First pulley; 26. Second rotating rod; 27. Second pulley; 28. Climbing wheel; 29. ​​Drive motor; 210. Guide seat; 211. Moving column; 212. Limiting plate; 213. Spring limiting disc; 214. First spring; 215. U-shaped rod; 216. Anti-detachment guide rod; 217. Rotating rod mounting base; 3. Protective mechanism; 31. 31. Follower wheel mounting bracket; 32. Fixed bracket; 33. Third rotating rod; 34. Auxiliary wheel; 35. Hollow follower wheel; 36. Rotating cylinder; 37. Second spring; 38. Damping block; 39. First telescopic rod; 310. Connecting rope; 311. Guide frame; 312. Conical locking block; 313. Temporary limit rod; 314. Third spring; 315. Fourth spring; 316. Second telescopic rod; 317. Connecting rope guide; 4. Connecting assembly; 41. Positioning plate; 42. Positioning frame; 43. First bolt; 44. Connecting mounting bracket; 45. Second bolt. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 11As shown, the present invention includes an annular lifting platform for mounting on the outer periphery of a wind turbine tower. Multiple drive mechanisms 2 are spaced apart along the circumference of the annular lifting platform. Each drive mechanism 2 includes a climbing wheel 28 for contacting the outer periphery of the wind turbine tower. At least one drive mechanism 2's climbing wheel 28 is equipped with a drive motor 29, which drives the climbing wheel 28 to rotate, enabling the annular lifting platform to move up and down along the axis of the wind turbine tower. Each drive mechanism 2 includes a hydraulic push rod 21 and a guide seat 210. The fixed end of the hydraulic push rod 21 and the guide seat 210 are both fixed to the annular lifting platform. The axis of the hydraulic push rod 21 is horizontally arranged radially along the annular lifting platform, and the telescopic end of the hydraulic push rod 21 is located on the side closer to the center of the annular lifting platform relative to its fixed end. It can be understood that, in use, the annular lifting platform and the wind turbine tower are essentially coaxially arranged, the radial direction of the annular lifting platform corresponds to the radial direction of the wind turbine tower, and the center of the annular lifting platform refers to the axis corresponding to its central shaft hole. A movable frame 22 is fixed to the telescopic end of the hydraulic push rod 21. The length direction of the movable frame 22 is horizontally arranged along the radial direction of the hydraulic push rod 21. Two climbing wheel mounting seats 23 are fixed on the side of the movable frame 22 near the center of the annular lifting platform. The two climbing wheel mounting seats 23 are located at the two ends of the length direction of the movable frame 22, and the two climbing wheel mounting seats 23 are symmetrically arranged with respect to the axis of the hydraulic push rod 21. The climbing wheels 28 correspond one-to-one with the climbing wheel mounting seats 23. The climbing wheels 28 are rotatably mounted on the climbing wheel mounting seats 23 through the second rotating rod 26. That is, when the hydraulic push rod 21 drives the movable frame 22 to move towards the wind turbine tower, the two climbing wheels 28 corresponding to the same drive mechanism 2 can synchronously approach the wind turbine tower, and the clamping force applied by the two climbing wheels 28 to the wind turbine tower is consistent. Multiple drive mechanisms 2 should generally be evenly spaced to make the overall force between the annular lifting platform and the wind turbine tower balanced. The number of drive mechanisms 2 can be designed reasonably according to the actual situation, generally two or three are sufficient. In the preferred embodiment shown in the attached figure, the drive mechanisms 2 are two symmetrically arranged. The multiple hydraulic push rods 21 of the present invention work synchronously, and can drive the climbing wheel 28 to move synchronously through the moving frame 22, so that the climbing wheel 28 and the outer peripheral surface of the wind turbine tower are always in contact, thereby adapting to the tapered variable cross-section characteristics of the wind turbine tower. It is understood that how to control the synchronous operation of multiple hydraulic push rods 21 is common knowledge to those skilled in the art. For example, a flow divider valve can be installed in the parallel oil circuit to automatically divide the flow equally according to a fixed ratio (1:1) to achieve speed synchronization; or an equal displacement hydraulic motor or synchronous cylinder can be used to force equal flow division; or each hydraulic push rod 21 can be equipped with a proportional valve + displacement sensor (magnetostrictive / grating), the PLC collects the position in real time, and the valve opening is dynamically adjusted by the PID algorithm to eliminate position difference; or a combination of servo valve + servo cylinder can be used.

[0024] The movable frame 22 or the climbing wheel mounting base 23 is fixedly connected to a movable column 211. The movable column 211 corresponds to the guide seat 210 and forms a sliding fit. The sliding direction and length direction of the movable column 211 relative to the guide seat 210 are both parallel to the axis of the corresponding hydraulic push rod 21. When the hydraulic push rod 21 drives the movable frame 22 to move, the sliding fit between the movable column 211 and the guide seat 210 can play a guiding role.

[0025] Each movable column 211 has multiple limiting slots spaced along its length on its side. Each movable column 211 has a corresponding limiting plate 212 that forms a unidirectional transmission engagement with the limiting slots. The limiting plate 212 can slide back and forth relative to the guide seat 210, and the sliding direction of the limiting plate 212 is perpendicular to the length direction of the movable column 211. A first spring 214 is provided between the limiting plate 212 and the guide seat 210. The return force of the first spring 214 ensures that the limiting plate 212 is always engaged in the limiting slot of the movable column 211. The unidirectional transmission engagement between the limiting plate 212 and the limiting slots allows the movable frame 22 to move only towards the center of the annular lifting platform. See details... Figure 6On both sides corresponding to the moving direction of the moving column 211, the limiting plate 212 has a vertical limiting plane one on the side near the climbing wheel 28 and a limiting slope one on the side away from the climbing wheel 28. The shape of the limiting slot is adapted to the limiting end of the limiting plate 212. The inner wall of the limiting slot on the side near the climbing wheel 28 is a vertical limiting plane two, and the inner wall on the side away from the climbing wheel 28 is a limiting slope two. When the moving column 211 moves with the moving frame 22 toward the center of the annular lifting platform, the limiting slope two presses against the limiting slope one, which can generate a component force in the moving direction of the limiting plate 212. This causes the limiting plate 212 to overcome the spring force of the first spring 214 and disengage from the limiting slot until the limiting plate 212 is aligned with the next limiting slot. Under the spring reset force of the first spring 214, the limiting plate 212 re-engages with the next limiting slot. When the circular lifting platform is at the designed height, the limiting plate 212 is engaged with the corresponding limiting slot. If the moving frame 22 needs to move away from the center of the circular lifting platform, the vertical limiting plane one and the vertical limiting plane two are in contact with each other, and the force between them is set perpendicular to the moving direction of the limiting plate 212. Therefore, the force that can drive the limiting plate 212 to move cannot be generated. The limiting plate 212 cannot disengage from the limiting slot. The limiting plate 212, the guide seat 210 and the moving column 211 remain relatively fixed. This means that the moving frame 22 cannot move away from the center of the circular lifting platform at this time, thereby realizing the one-way transmission cooperation between the limiting plate 212 and the limiting slot. The above structural design allows the movable frame 22 to move only toward the center of the circular lifting platform, which is equivalent to matching the upward movement of the climbing wheel 28. When the hydraulic push rod 21 fails and causes the circular lifting platform to slip unexpectedly, the counter-thrust of the wind turbine tower causes the movable column 211 to attempt to move away from the center of the circular lifting platform. The rigid limit of the limiting plate 212 can directly block the displacement, firmly locking the circular lifting platform on the outside of the wind turbine tower, achieving instant braking and ensuring the reliability of the overall mechanism.

[0026] To facilitate the synchronization of the hydraulic push rod 21 and simultaneously control the clamping force applied by the climbing wheel 28 to the wind turbine tower, in some preferred embodiments, a pressure sensor is installed between the telescopic end of the hydraulic push rod 21 and the moving frame 22 to detect the force exerted between them in the axial direction of the hydraulic push rod 21. The pressure sensor is electrically connected to the controller of the hydraulic push rod 21. It is understood that controlling the extension and retraction of the piston rod of the hydraulic push rod 21 using a pressure sensor can be achieved using existing conventional control programs; this invention does not involve any improvement to the computer program. In specific implementation, the pressure sensor can monitor the clamping force of the climbing wheel 28 on the wind turbine tower in real time. When the clamping force is below or above a threshold, the extension and retraction of the piston rod of the hydraulic push rod 21 is automatically adjusted. This prevents the climbing wheel 28 from slipping between itself and the wind turbine tower when the clamping force is below the threshold, thus preventing it from failing to climb, and also prevents the climbing wheel 28 from damaging the exterior of the wind turbine tower when the clamping force is above the threshold.

[0027] To ensure a simple, reliable structure and ease of assembly and implementation, in some preferred embodiments, the drive mechanisms 2 are all located on the upper surface of the annular lifting platform. The moving columns 211 and the climbing wheel mounting seats 23 are fixedly connected in a one-to-one correspondence, meaning each drive mechanism 2 has two corresponding moving columns 211. Limiting slots are located on the upper surface of the moving columns 211. The top of the guide seat 210 has a limiting sliding hole that slides with the limiting plate 212. The axis of the limiting sliding hole is vertically oriented. The upper end of the limiting plate 212 passes through the limiting sliding hole and is fixedly connected to a spring limiting disc 213. A first spring 214 is sleeved on the outer periphery of the limiting plate 212 and is fixedly connected between the top surface of the guide seat 210 and the lower surface of the spring limiting disc 213. Another purpose of having the limiting slots located on the upper surface of the moving columns 211 is that, in other preferred embodiments, two limiting plates 212 corresponding to the same drive mechanism 2 can share the same set of U-shaped rods 215 and anti-detachment guide rods 216. In some alternative embodiments, the limiting slot may also be provided on the side surface of the moving column 211. Correspondingly, the travel limiting mechanism for limiting the movement of the limiting plate 212 toward the direction away from the limiting slot is provided independently for each limiting plate 212. The function of the travel limiting mechanism is to prevent the limiting plate 212 from completely dislodging from the limiting sliding hole.

[0028] In a preferred embodiment, each drive mechanism 2 includes a U-shaped rod 215 and an anti-detachment guide rod 216. The opening of the U-shaped rod 215 faces downward, which means that the U-shaped rod 215 includes two parallel vertical sections and a top horizontal section connected to the top of the two vertical sections. The bottom ends of the U-shaped rod 215 are fixedly connected to the spring limiting plate 213 one-to-one. The anti-detachment guide rod 216 is fixedly installed on the upper surface of the annular lifting platform. The axis of the anti-detachment guide rod 216 is vertically arranged. The anti-detachment guide rod 216 is located on both sides of the hydraulic push rod 21. The top horizontal section of the U-shaped rod 215 has an anti-detachment guide hole through which the anti-detachment guide rod 216 passes. The top of the anti-detachment guide rod 216 has an anti-detachment limiting end for limiting the upward movement of the U-shaped rod 215. When the U-shaped rod 215 moves upward to the limit position, the lower end of the limiting plate 212 is located in the limiting sliding hole. By adopting the above scheme, the limiting plate 212 can be prevented from completely dislodging from the limiting sliding hole, which facilitates the reset of the limiting plate 212. At the same time, the sliding cooperation between the U-shaped rod 215 and the anti-dislodgement guide rod 216 can also guide the movement of the limiting plate 212 and the spring limiting plate 213.

[0029] To enhance structural reliability, in some preferred embodiments, the drive mechanism 2 is located on the upper surface of the annular lifting platform. Multiple protective mechanisms 3 are spaced circumferentially along the lower surface of the annular lifting platform. Each protective mechanism 3 includes a follower wheel mounting frame 31, a fixed frame 32, a hollow follower wheel 35, and a guide frame 311. The fixed frame 32 and guide frame 311 are fixed to the lower surface of the annular lifting platform. The side of the fixed frame 32 closest to the center of the annular lifting platform is connected to the follower wheel mounting frame 31 via a second telescopic rod 316. The second telescopic rod 316 allows the follower wheel mounting frame 31 to reciprocate radially along the annular lifting platform. A third rotating rod 33 is rotatably connected to the follower wheel mounting frame 31. The axis of the three rotating rods 33 is horizontally set and perpendicular to the direction of movement of the follower wheel mounting bracket 31. The third rotating rod 33 can rotate around its own axis relative to the follower wheel mounting bracket 31. Both ends of the third rotating rod 33 pass through the follower wheel mounting bracket 31 and are coaxially fixedly connected to auxiliary wheels 34. A fourth spring 315 is fixedly set between the fixed bracket 32 ​​and the follower wheel mounting bracket 31. The axis of the fourth spring 315 is consistent with the axis of the second telescopic rod 316. The spring force of the fourth spring 315 can ensure that the side of the auxiliary wheel 34 closest to the center of the annular lifting platform is always in contact with the outer circumference of the wind turbine tower. The hollow follower wheel 35 is coaxially sleeved in the middle area of ​​the third rotating rod 33. Rotating cylinders 36 are coaxially fixed at both ends of the driven wheel 35. The ends of the rotating cylinders 36 away from the hollow follower wheel 35 are rotatably connected to the follower wheel mounting bracket 31. Multiple first telescopic rods 39 are evenly spaced along the circumference of the outer surface of the third rotating rod 33. The axial direction of the first telescopic rods 39 is arranged along the radial direction of the third rotating rod 33. A damping block 38 is fixedly connected to the end of each first telescopic rod 39 away from the third rotating rod 33. A second spring 37 is coaxially sleeved on the outer periphery of the first telescopic rod 39. One end of the second spring 37 is fixedly connected to the third rotating rod 33, and the other end is fixedly connected to the damping block 38. When the second spring 37 is in its natural state, the outer surface of the damping block 38 is connected to the hollow follower wheel 35. The inner peripheral wall has a gap, and the hollow follower wheel 35 and the rotating cylinder 36 form a rotational engagement with the third rotating rod 33. That is, when the third rotating rod 33 and the auxiliary wheel 34 rotate synchronously, the hollow follower wheel 35 and the rotating cylinder 36 cannot rotate with it. The guide frame 311 is correspondingly arranged above the hollow follower wheel 35. The inner wall of the guide frame 311 is slidably connected with a conical block 312, and the conical block 312 has a block braking part that extends towards the center of the ring lifting platform relative to the guide frame 311. The block braking part has a first state in which it is spaced apart from the wind turbine tower, and a second state in which it abuts against the wind turbine tower and makes the ring lifting platform and the wind turbine tower relatively fixed.The tapered locking block 312 is inclined relative to the vertical direction in its sliding direction. When the tapered locking block 312 moves upward relative to the guide frame 311, it simultaneously moves towards the center of the annular lifting platform. A third spring 314 is fixedly connected between the bottom end of the inner wall of the guide frame 311 and the bottom end face of the tapered locking block 312. The axial direction of the third spring 314 is consistent with the sliding direction of the tapered locking block 312. A connecting rope 310 is fixed to the outer surface of the hollow follower wheel 35. The connecting rope 310 is located away from the hollow follower wheel 35. A temporary limiting rod 313 is fixed at one end. The guide frame 311 and the conical block 312 both have limiting rod insertion holes that are adapted to the temporary limiting rod 313. The guide frame 311 is provided with a connecting rope guide 317 that cooperates with the connecting rope 310 in the outer area of ​​its limiting rod insertion hole. When the auxiliary wheel 34 moves normally with the drive mechanism 2, the temporary limiting rod 313 is connected to the guide frame 311 and the conical block 312 at the same time. The third spring 314 is in a compressed state, and the locking brake part of the conical block 312 is in the first state.When the auxiliary wheel 34 moves downward rapidly (it should be understood that the rapid movement here is not a limitation on its specific moving speed, but only refers to the moving speed of the auxiliary wheel 34 when the annular lifting platform falls unexpectedly due to a malfunction, and this moving speed is much greater than the speed of the auxiliary wheel 34 when it moves normally with the drive mechanism 2), the damping block 38 can abut against the inner peripheral wall of the hollow follower wheel 35 under the action of centrifugal force, and drive the hollow follower wheel 35 to rotate. The hollow follower wheel 35 drives the temporary limit rod 313 to move through the connecting rope 310, so that the temporary limit rod 313 can release the limiting connection relationship with the conical block 312, and then the conical block 312 can move upward under the restoring force of the third spring 314, thereby switching the block braking part of the conical block 312 to the second state. In this embodiment, the present invention achieves a second layer of protection by adding multiple protective mechanisms 3 to the lower surface of the annular lifting platform. This second layer of protection utilizes a centrifugal-triggered emergency locking mechanism. When the annular lifting platform falls, the auxiliary wheel 34 rotates at high speed, and the centrifugal force drives the damping block 38 to move outward, causing the hollow follower wheel 35 to rotate. This releases the temporary limiting rod 313 via the connecting rope 310, and the compressed third spring 314 pushes the conical locking block 312 to quickly embed into the gap between the annular lifting platform and the wind turbine tower. The conical locking block 312 forms a rigid stop (at this time, the second telescopic rod 316 has correspondingly shortened to its limit position), thus preventing the fall. The number of protective mechanisms 3 can be reasonably designed according to actual conditions; generally, two or three are sufficient. In the preferred embodiment shown in the attached figure, two protective mechanisms 3 are symmetrically arranged. To make the transmission structure of the connecting rope 310 more reliable, annular limiting flanges are usually added to both ends of the axial direction of the outer circumferential surface of the hollow follower wheel 35. These annular limiting flanges prevent the connecting rope 310 from detaching from the outer circumferential surface of the hollow follower wheel 35, ensuring that the connecting rope 310 is wound around the outer circumferential surface of the hollow follower wheel 35 when the hollow follower wheel 35 rotates with the third rotating rod 33 and the damping block 38.

[0030] To ensure structural simplicity and reliability, in some preferred embodiments, two first telescopic rods 39 are fixed circumferentially at uniform intervals on the outer surface of the third rotating rod 33, and the outer end face of the damping block 38 has a matching arc-shaped surface with the inner peripheral wall of the hollow follower wheel 35. With this structural design, the outer end face of the damping block 38 and the inner peripheral wall of the hollow follower wheel 35 can form surface contact, thereby generating a sufficiently large frictional force between them. This allows the third rotating rod 33 to drive the hollow follower wheel 35 to rotate via the damping block 38.

[0031] The main function of the connecting rope guide 317 is to guide the movement of the connecting rope 310, ensuring that the tension applied by the connecting rope 310 to the connecting rope guide 317 is consistent with the axial direction of the temporary limiting rod 313, that is, consistent with the direction of movement of the temporary limiting rod 313 as it is pulled out of the limiting rod insertion hole on the conical block 312, thus ensuring the reliability of the protective mechanism 3. In a preferred embodiment, the axial directions of the limiting rod insertion holes on the guide frame 311 and the limiting rod insertion holes on the conical block 312 are both horizontally arranged, and the connecting rope guide 317 is an auxiliary ring coaxially arranged relative to the limiting rod insertion holes. In some alternative embodiments, the connecting rope guide 317 may also adopt the structure of a guide pulley.

[0032] To ensure a simple and reliable structure, in some preferred embodiments, each protective mechanism 3 includes two parallel second telescopic rods 316, with a fourth spring 315 correspondingly sleeved around the outer periphery of each second telescopic rod 316.

[0033] To ensure a simple, reliable, and easy-to-assemble structure, in some preferred embodiments, the follower wheel mounting bracket 31 is a U-shaped mounting bracket with its opening facing away from the second telescopic rod 316. Taking the protective mechanism 3 located on the left and right sides of the wind turbine tower as a reference state, this is equivalent to the U-shaped mounting bracket including a U-shaped mounting bracket base plate located near the second telescopic rod 316, with U-shaped mounting bracket side plates fixed at both the front and rear ends of the U-shaped mounting bracket base plate near the center of the wind turbine tower.

[0034] To ensure a simple, reliable, and easy-to-assemble structure, in some preferred embodiments, the climbing wheel mounting base 23 is a U-shaped frame with its opening facing away from the moving frame 22, and the climbing wheel 28 is correspondingly disposed within the U-shaped frame. Taking the drive mechanism 2 located on the left and right sides of the wind turbine tower as a reference state, this is equivalent to the U-shaped frame including a U-shaped frame base plate located on the side closer to the moving frame 22. The side of the U-shaped frame base plate closest to the center of the wind turbine tower has U-shaped frame side plates fixed at both the front and rear ends. The climbing wheel 28 extends from the opening end of the U-shaped frame on the side closest to the wind turbine tower and contacts the outer surface of the wind turbine tower. A first rotating rod 24 is rotatably connected to the side of the movable frame 22 near the center of the annular lifting platform via a rotating rod mounting base 217. The rotating rod mounting base 217 and the movable frame 22 are typically an integral structure. The first rotating rod 24 can rotate relative to the movable frame 22 around its own axis. The axial direction of the first rotating rod 24 is consistent with the length direction of the movable frame 22. The two axial ends of the first rotating rod 24 are rotatably connected to the U-shaped frame one-to-one. Two first pulleys 25 are coaxially fixed to the outer surface of the first rotating rod 24. Second pulleys 27 are coaxially fixed to the outer surface of the second rotating rod 26. The second pulleys 27 correspond one-to-one with the first pulleys 25 and are connected via belt drive within the U-shaped frame. Each drive mechanism 2 includes a drive motor 29, which is fixed to one of the U-shaped frames. The output shaft of the drive motor 29 is fixedly connected to the end of the first rotating rod 24 near the drive motor 29. In this design, a conventional servo motor can generally be used for the drive motor 29. Servo motor 29 provides power for the rotation of the first rotating rod 24. The two servo motors 29 of the ring lifting platform share the same controller so that the two servo motors 29 can operate synchronously. When the first rotating rod 24 rotates, it drives the second rotating rod 26 and the climbing wheel 28 to rotate through the first pulley 25 and the second pulley 27.

[0035] The main structure of the ring-shaped lifting platform can be implemented with reference to existing technology. To ensure construction safety, guardrails 11 are usually fixed to the outer perimeter of its upper surface. For ease of assembly, the ring-shaped lifting platform includes two symmetrically arranged semi-ring platforms 1. The two semi-ring platforms 1 are connected at their respective ends by a connecting component 4. Taking the two semi-ring platforms 1 located on the left and right sides of the wind turbine tower as a reference state, the two connecting components 4 are respectively located on the front and rear sides of the wind turbine tower. In some embodiments, the arrangement of the connecting components 4 can refer to existing technology. To ensure a simple, reliable, and easy-to-assemble structure, in some preferred embodiments, each connecting component 4 includes a positioning plate 41, a positioning frame 42, and two connecting mounting brackets 44. The positioning plate 41 is fixed to the upper surface of one of the semi-annular platforms 1, and the positioning frame 42 is fixed to the upper surface of the other semi-annular platform 1. One end of the positioning plate 41 is horizontally inserted into the positioning frame 42, and the end of the positioning plate 41 inserted into the positioning frame 42 is connected to the positioning frame 42 by a first bolt 43. The axis of the first bolt 43 is vertically oriented, and the positioning plate 41 has a threaded hole that matches the first bolt 43. The two connecting mounting brackets 44 are correspondingly fixed to the lower surfaces of the two semi-annular platforms 1, and the two connecting mounting brackets 44 are connected by multiple second bolts 45, the axes of the second bolts 45 being horizontally oriented. The connecting mounting bracket 44 can generally be composed of a vertical connecting plate and a reinforcing rib plate, with the vertical connecting plate used to connect the second bolts 45. The locking and limiting effect of the positioning plate 41 and the positioning frame 42, combined with the vertically set first bolt 43 and the horizontally set second bolt 45, can fully ensure the reliability of the connection between the two semi-ring platforms 1.

[0036] In a preferred embodiment of the present invention, its overall working principle is as follows: Two semi-circular platforms 1 are placed around the outside of the wind turbine tower. After installation via the connecting assembly 4, the hydraulic push rod 21 extends, causing the climbing wheel 28 to contact the outer wall of the wind turbine tower. The drive motor 29 is then controlled to rotate, driving the first rotating rod 24 to rotate. This rotation, via the first pulley 25, the second pulley 27, and the second rotating rod 26, drives the climbing wheel 28 to rotate. A pressure sensor between the hydraulic push rod 21 and the moving frame 22 monitors the impact of the climbing wheel 28 on the wind turbine tower in real time. The clamping force of the tower is adjusted automatically when it is below or above a threshold. This prevents the climbing wheel 28 from sliding between itself and the wind turbine tower when the clamping force is below the threshold, and also prevents the climbing wheel 28 from damaging the outside of the wind turbine tower when the clamping force is above the threshold. The climbing wheel 28 enables the semi-circular platform 1 to climb stably on the surface of the conical tower. Workers can carry out auxiliary installation work on the semi-circular platform 1 and can install or carry equipment on the semi-circular platform 1 to assist in the installation.

[0037] As the climbing wheel mounting base 23 gradually moves closer to the wind turbine tower, the moving column 211 slides within the guide seat 210, and the limiting slot of the moving column 211 pushes the inclined surface of the limiting plate 212 (i.e., the limiting inclined surface one mentioned above) upward. At this time, the first spring 214 is stretched. When the limiting plate 212 aligns with the limiting slot of the moving column 211, the limiting plate 212 inserts into the limiting slot of the moving column 211. At this time, the moving column 211 cannot move away from the wind turbine tower. If the hydraulic push rod 21 fails, causing the semi-circular platform 1 to accidentally slip off the wind turbine tower, the conical wind turbine tower will push the climbing wheel mounting base 23 and the moving column 211 away from the wind turbine tower. The semi-circular platform 1 moves away from the wind turbine tower, and the limiting plate 212 prevents the moving column 211 and the climbing wheel mounting base 23 from moving, thus locking the semi-circular platform 1 outside the wind turbine tower and preventing it from falling, thus providing the first layer of protection for the semi-circular platform 1. When the semi-circular platform 1 needs to be moved down after the installation work is completed, the worker can lift the U-shaped rod 215 upwards. At this time, the first spring 214 is stretched, and the limiting plate 212 releases the limiting of the moving column 211, allowing the hydraulic push rod 21 to retract and the semi-circular platform 1 to move down. When the semi-circular platform 1 falls accidentally, the worker releases the U-shaped rod 215, allowing the limiting plate 212 to be properly locked into the limiting slot of the moving column 211.

[0038] The fourth spring 315 is always compressed, ensuring that the auxiliary wheel 34 remains close to the surface of the wind turbine tower during the climbing process of the semi-ring platform 1. If the semi-ring platform 1 accidentally falls off the wind turbine tower, the auxiliary wheel 34, which is in close contact with the tower surface, will rotate at high speed, causing the third rotating rod 33 and the damping block 38 to rotate at high speed. This causes the centrifugal force of the damping block 38 to exceed the elastic force of the second spring 37, causing the two damping blocks 38 to move away from the third rotating rod 33 and contact the hollow follower wheel 35. Under the action of friction, the damping block 38 drives the hollow follower wheel 35 to rotate, causing the connecting rope 310 to pull out the temporary limiting rod 313 that is stuck inside the guide frame 311 and the conical locking block 312. At this time, under the elastic force of the compressed third spring 314, the conical locking block 312 is pushed out of the guide frame 311. The conical locking block 312 will be stuck between the semi-ring platform 1 and the wind turbine tower. The locking block braking part of the conical locking block 312 plays a braking role, preventing the semi-ring platform 1 from falling further, thus playing a second layer of protection.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A wind turbine tower installation platform that can move up and down, comprising an annular lifting platform for fitting around the outer periphery of the wind turbine tower, wherein the annular lifting platform is provided with a plurality of drive mechanisms (2) spaced apart along its circumference, each drive mechanism (2) including a climbing wheel (28) for contacting the outer periphery of the wind turbine tower, and at least one drive mechanism (2) having a drive motor (29) for equipping the climbing wheel (28) with a drive motor (29) to drive the climbing wheel (28) to rotate, thereby enabling the annular lifting platform to move up and down along the axis of the wind turbine tower, characterized in that: Each drive mechanism (2) includes a hydraulic push rod (21) and a guide seat (210). The fixed end of the hydraulic push rod (21) and the guide seat (210) are both fixed on the annular lifting platform. The axis of the hydraulic push rod (21) is set horizontally along the radial direction of the annular lifting platform. The telescopic end of the hydraulic push rod (21) is located on the side closer to the center of the annular lifting platform relative to its fixed end. A movable frame (22) is fixed to the telescopic end of the hydraulic push rod (21). The length direction of the movable frame (22) is along the radial direction of the hydraulic push rod (21). The movable frame (22) is mounted on a horizontal plane. Two climbing wheel mounting seats (23) are fixed on one side of the movable frame (22) near the center of the circular lifting platform. The two climbing wheel mounting seats (23) are located at opposite ends of the movable frame (22) along its length, and are symmetrically arranged relative to the axis of the hydraulic push rod (21). Each climbing wheel (28) corresponds to one of the climbing wheel mounting seats (23). The climbing wheel (28) is rotatably mounted on the climbing wheel mounting seat (23) via the second rotating rod (26). The movable frame (22) or the climbing wheel mounting... The seat (23) is fixedly connected to a movable column (211), which corresponds to the guide seat (210) and forms a sliding fit. The sliding direction and length direction of the movable column (211) relative to the guide seat (210) are parallel to the axis of the corresponding hydraulic push rod (21). Each movable column (211) has multiple limiting slots spaced along its length on its side. Each movable column (211) is correspondingly provided with a limiting plate (212) that forms a one-way transmission fit with the limiting slot. 2) It can slide back and forth relative to the guide seat (210), and the sliding direction of the limiting plate (212) is perpendicular to the length direction of the moving column (211). A first spring (214) is provided between the limiting plate (212) and the guide seat (210). The reset force of the first spring (214) makes the limiting plate (212) always locked in the limiting slot of the moving column (211). The one-way transmission cooperation between the limiting plate (212) and the limiting slot makes the moving frame (22) only able to move towards the center of the circular lifting platform.

2. The wind turbine tower installation platform that can move up and down as described in claim 1, characterized in that: The drive mechanism (2) is set on the upper surface of the ring lifting platform. There are two drive mechanisms (2) arranged symmetrically. The moving column (211) and the climbing wheel mounting seat (23) are fixedly connected one-to-one. The limiting slot is set on the upper surface of the moving column (211). The top of the guide seat (210) has a limiting sliding hole that forms a sliding fit with the limiting plate (212). The axis of the limiting sliding hole is set vertically. The upper end of the limiting plate (212) passes through the limiting sliding hole and is fixedly connected to the spring limiting plate (213). The first spring (214) is sleeved on the outer periphery of the limiting plate (212). The first spring (214) is fixedly connected between the top surface of the guide seat (210) and the lower surface of the spring limiting plate (213).

3. The wind turbine tower installation platform that can move up and down as described in claim 2, characterized in that: Each drive mechanism (2) includes a U-shaped rod (215) and an anti-detachment guide rod (216). The opening of the U-shaped rod (215) faces downward, and the bottom two ends of the U-shaped rod (215) are fixedly connected to the spring limiting plate (213) one by one. The anti-detachment guide rod (216) is fixedly installed on the upper surface of the ring lifting platform. The axis of the anti-detachment guide rod (216) is set vertically. The anti-detachment guide rod (216) is set on both sides of the hydraulic push rod (21). The top horizontal section of the U-shaped rod (215) has an anti-detachment guide hole for the anti-detachment guide rod (216) to pass through. The top of the anti-detachment guide rod (216) has an anti-detachment limiting end for limiting the upward movement of the U-shaped rod (215). When the U-shaped rod (215) moves upward to the limit position, the lower end of the limiting plate (212) is located in the limiting sliding hole.

4. The wind turbine tower installation platform that can move up and down as described in claim 1, characterized in that: A pressure sensor is provided between the telescopic end of the hydraulic push rod (21) and the moving frame (22) to detect the force between them in the axial direction of the hydraulic push rod (21). The pressure sensor is electrically connected to the controller of the hydraulic push rod (21).

5. The wind turbine tower installation platform that can move up and down as described in claim 1, characterized in that: The drive mechanism (2) is located on the upper surface of the ring lifting platform. Multiple protective mechanisms (3) are arranged at intervals along the circumference of the lower surface of the ring lifting platform. Each protective mechanism (3) includes a follower wheel mounting bracket (31), a fixed bracket (32), a hollow follower wheel (35), and a guide frame (311). The fixed frame (32) and the guide frame (311) are both fixed to the lower surface of the annular lifting platform. The fixed frame (32) is connected to the follower wheel mounting frame (31) via a second telescopic rod (316) on the side near the center of the annular lifting platform. The second telescopic rod (316) enables the follower wheel mounting frame (31) to reciprocate along the radial direction of the annular lifting platform. A third rotating rod (33) is rotatably connected to the follower wheel mounting frame (31). The axis of the third rotating rod (33) is set horizontally and is perpendicular to the direction of movement of the follower wheel mounting frame (31). The third rotating rod (33) is configured to rotate around its own axis relative to the follower wheel mounting bracket (31). Both ends of the third rotating rod (33) pass through the follower wheel mounting bracket (31) and are coaxially fixedly connected to auxiliary wheels (34). A fourth spring (315) is fixedly installed between the fixed bracket (32) and the follower wheel mounting bracket (31). The axial direction of the fourth spring (315) is consistent with the axial direction of the second telescopic rod (316). The spring force of the fourth spring (315) can make the auxiliary wheel (34) closer to the center of the annular lifting platform. It is always in contact with the outer circumferential surface of the wind turbine tower; the hollow follower wheel (35) is coaxially sleeved in the middle area of ​​the third rotating rod (33), and the two ends of the hollow follower wheel (35) are coaxially fixed with rotating cylinders (36), and the ends of the rotating cylinders (36) away from the hollow follower wheel (35) are all rotatably connected to the follower wheel mounting frame (31); multiple first telescopic rods (39) are evenly spaced along the circumference on the outer surface of the third rotating rod (33), and the axial direction of the first telescopic rods (39) is arranged along the radial direction of the third rotating rod (33). A damping block (38) is fixedly connected to the end away from the third rotating rod (33). A second spring (37) is coaxially sleeved on the outer periphery of the first telescopic rod (39). One end of the second spring (37) is fixedly connected to the third rotating rod (33), and the other end is fixedly connected to the damping block (38). When the second spring (37) is in its natural state, there is a gap between the outer surface of the damping block (38) and the inner peripheral wall of the hollow follower wheel (35). The hollow follower wheel (35) and the rotating cylinder (36) form a rotational fit with respect to the third rotating rod (33). Guide frames (311) are arranged one-to-one above the hollow follower wheels (35). A conical block (312) is slidably connected to the inner wall of the guide frame (311). The conical block (312) has a locking brake part that extends toward the center of the annular lifting platform relative to the guide frame (311). The locking brake part has a first state in which it is spaced apart from the wind turbine tower, and a second state in which it abuts against the wind turbine tower and fixes the annular lifting platform and the wind turbine tower relatively. The sliding direction of the conical block (312) is inclined relative to the vertical direction. When the conical block (312) moves upward relative to the guide frame (311), the conical block (312) moves toward the center of the annular lifting platform at the same time. A third spring (314) is fixedly connected between the bottom end of the inner wall of the guide frame (311) and the bottom end face of the conical block (312). The axial direction of the third spring (314) is consistent with the sliding direction of the conical block (312). A connecting rope (310) is fixed to the outer surface of the hollow follower wheel (35). A temporary limiting rod (313) is fixed to the end of the connecting rope (310) away from the hollow follower wheel (35). The guide frame (311) and the conical block (312) both have limiting rod insertion holes that are compatible with the temporary limiting rod (313). The guide frame (311) has a connecting rope guide (317) that cooperates with the connecting rope (310) in the outer area of ​​its limiting rod insertion hole. When the auxiliary wheel (34) moves normally with the drive mechanism (2), the temporary limiting rod (313) is connected to the guide frame (311) and the conical block (312) at the same time, and the third spring (314) is compressed. In the first state, the locking and braking part of the conical locking block (312) is in the first state; when the auxiliary wheel (34) moves downward quickly, the damping block (38) can abut against the inner circumferential wall of the hollow follower wheel (35) under the action of centrifugal force, and drive the hollow follower wheel (35) to rotate. The hollow follower wheel (35) drives the temporary limit rod (313) to move through the connecting rope (310), so that the temporary limit rod (313) can release the limiting connection relationship with the conical locking block (312), and then the conical locking block (312) can move upward under the restoring force of the third spring (314), thereby switching the locking and braking part of the conical locking block (312) to the second state.

6. The wind turbine tower installation platform that can move up and down as described in claim 5, characterized in that: Two first telescopic rods (39) are fixed at uniform intervals along the circumference on the outer surface of the third rotating rod (33). The outer end face of the damping block (38) and the inner circumferential wall of the hollow follower wheel (35) have matching arc surfaces.

7. The wind turbine tower installation platform that can move up and down as described in claim 5, characterized in that: The axial direction of the limit rod insertion hole on the guide frame (311) and the axial direction of the limit rod insertion hole on the tapered block (312) are both horizontally arranged, and the connecting rope guide (317) is an auxiliary ring arranged coaxially with respect to the limit rod insertion hole.

8. The wind turbine tower installation platform that can move up and down as described in claim 5, characterized in that: Each protective mechanism (3) includes two second telescopic rods (316) arranged side by side, and a fourth spring (315) is fitted on the outer periphery of the second telescopic rods (316) in a corresponding manner.

9. The wind turbine tower installation platform that can move up and down as described in claim 5, characterized in that: The climbing wheel mounting base (23) is a U-shaped frame with its opening facing away from the moving frame (22), and the climbing wheel (28) is correspondingly set inside the U-shaped frame; the side of the moving frame (22) closest to the center of the annular lifting platform is rotatably connected to the first rotating rod (24) via the rotating rod mounting base (217). The first rotating rod (24) can rotate around its own axis relative to the moving frame (22). The axial direction of the first rotating rod (24) is consistent with the length direction of the moving frame (22), and the two ends of the first rotating rod (24) rotate one-to-one with the U-shaped frame. The first rotating rod (24) has two first pulleys (25) coaxially fixed on its outer surface, and the second rotating rod (26) has two second pulleys (27) coaxially fixed on its outer surface. The second pulleys (27) and the first pulleys (25) correspond to each other and are connected by belt drive within the U-shaped frame. Each drive mechanism (2) includes a drive motor (29), which is fixed on one of the U-shaped frames. The output shaft of the drive motor (29) is fixedly connected to the end of the first rotating rod (24) near the drive motor (29).

10. The wind turbine tower installation platform that can move vertically as described in any one of claims 1 to 9, characterized in that: The circular lifting platform includes two symmetrically arranged semi-circular platforms (1). The two semi-circular platforms (1) are connected at their respective ends by a connecting component (4). Each connecting component (4) includes a positioning plate (41), a positioning frame (42), and two connecting mounting brackets (44). The positioning plate (41) is fixed to the upper surface of one of the semi-circular platforms (1), and the positioning frame (42) is fixed to the upper surface of the other semi-circular platform (1). One end of the positioning plate (41) is horizontally inserted into the positioning frame (42). Inside, the positioning plate (41) is inserted into the positioning frame (42) at one end and connected to the positioning frame (42) by the first bolt (43). The axis of the first bolt (43) is set vertically, and the positioning plate (41) has a threaded hole that matches the first bolt (43). Two connecting mounting brackets (44) are fixed on the lower surface of the two semi-ring platforms (1) one to one, and the two connecting mounting brackets (44) are connected by multiple second bolts (45). The axis of the second bolts (45) is set horizontally.

Images