Wind power tower section type adaptive butt joint lifting appliance and lifting method thereof

Abstract

The application discloses a wind power tower section type adaptive butt joint lifting appliance and a lifting method thereof. The wind power tower section type adaptive butt joint lifting appliance comprises a steel lifting plate, an outer fixed ring and an inner fixed ring are coaxially arranged on the bottom surface of the steel lifting plate, a tower is arranged between the outer fixed ring and the inner fixed ring, a plurality of slot holes are arranged around the inner fixed ring, a jacking sliding block capable of extending outward is arranged in each slot hole, and the top circumference of the tower is fixed between the outer fixed ring and the inner fixed ring. A bottom pocket mechanism is arranged at the bottom of the tower, the bottom pocket mechanism comprises a plurality of hoisting limiting spiral pocket ropes, and the spiral pocket ropes are spirally arranged around the outer wall of the tower. The wind power tower section type adaptive butt joint lifting appliance and the lifting method thereof can not only ensure that the tower is vertical during hoisting, but also can limit the top, the bottom and the circumference of the tower during hoisting, thereby ensuring stability and safety, and are suitable for popularization and use.

Description

Technical Field

[0001] This invention relates to the field of wind turbine tower construction technology, and in particular to a segmented adaptive docking lifting tool for wind turbine towers and its lifting method. Background Technology

[0002] Wind power is one of the most widely used new energy power generation methods. Wind turbines are usually erected at heights of tens or even hundreds of meters in the air. Therefore, the wind turbine tower is the core support structure that ensures the stable operation of the wind turbine. Due to the large size and length of the wind turbine tower, it is impossible to produce and transport it as a whole. Therefore, most wind turbine towers adopt a construction scheme of segmented manufacturing, transportation, and on-site hoisting and docking. Multiple tower segments are hoisted and spliced ​​in sequence to form a complete support structure.

[0003] In the existing segmented hoisting construction process, since conventional lifting tools only fix and lift one end of the tower, the tower section is prone to tilting and swaying due to the shift of its own center of gravity after hoisting. This not only makes alignment and docking difficult, but also easily leads to hoisting safety accidents. Meanwhile, the inner and outer diameters of wind turbine towers of different specifications vary, and conventional lifting tools are not well-suited to them. Custom lifting tools need to be customized for different towers, which significantly increases construction costs. In addition, existing lifting equipment cannot simultaneously stabilize and limit the upper end, lower end, and outer circumference of the tower section during lifting. The locking force does not increase synchronously with the lifting weight after lifting, which easily leads to the risk of locking loosening during the lifting process. The safety and efficiency of docking operations are difficult to guarantee. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by providing a segmented adaptive docking lifting tool for wind turbine towers and its lifting method that can ensure the verticality of the tower and limit the top, bottom and circumference of the tower during the hoisting process, thereby ensuring stability and safety.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a segmented adaptive docking hoist for wind turbine towers, comprising a steel hoisting plate, wherein an outer fixing ring and an inner fixing ring are fixedly arranged coaxially on the bottom surface of the steel hoisting plate, and the tower is placed between the outer fixing ring and the inner fixing ring. Multiple slots are arrayed around the inner fixing ring, and each slot contains a pressing slider that can extend outwards. The top circumference of the tower is fixed between the outer fixing ring and the inner fixing ring. A bottom-supporting mechanism is provided at the bottom of the tower, the bottom-supporting mechanism comprising multiple lifting and limiting spiral ropes, the spiral ropes being spirally arranged around the outer wall of the tower.

[0006] Preferably, the inner side of the clamping slider is an inclined slope, and multiple extrusion rollers are provided on the inclined slope. An integral arc-shaped extrusion plate is fixed on the outer side of the clamping slider. The arc-shaped extrusion plate contacts the arc-shaped inner wall of the tower, and the outer wall of the tower contacts the inner wall of the outer fixing ring.

[0007] Preferably, the inner fixing ring is provided with a lifting plate inside, the lifting plate is coaxially arranged with the inner fixing ring, the upper surface of the lifting plate is provided with a slope adapted to the tightening slider, a telescopic rod is provided at the center of the lifting plate, a sleeve is fixed on the surface of the steel hanging plate, and the telescopic rod extends upward through the steel hanging plate and inside the sleeve.

[0008] Preferably, the bottom-supporting mechanism includes multiple engaging components, each including an L-shaped limiting plate. The surface of the L-shaped limiting plate is provided with an inner extension section and an outer extension section extending vertically upward. A gap is left between the inner extension section and the outer extension section, and the gap is used to engage the bottom section of the tower cylinder.

[0009] Preferably, multiple L-shaped limiting plates are fixed together as one unit by connecting rings, and the bottom surface of the L-shaped limiting plates is provided with high-strength bolts, which are adapted to the bolt holes at the bottom of the tower.

[0010] Preferably, the surface of the steel hanging plate is provided with a lifting ring, one end of the spiral rope is fixedly connected to the outer extension section, and the other end passes through the steel hanging plate and is fixedly connected to the lifting ring. Under normal conditions, the spiral rope is in a vertical state, and when the connecting ring rotates, the spiral rope is wound around the outer circumference of the tower.

[0011] Preferably, a connecting plate is fixed to the top of the telescopic rod, and through holes corresponding to the lifting rings are provided around the connecting plate. The connecting plate is connected to the lifting rings through the through holes by a wire rope braid. A wire rope loop with a lifting hole is fixed at the center of the surface of the connecting plate.

[0012] A method for hoisting a segmented adaptive docking spreader for wind turbine towers includes the following steps: Step 1: Positioning the upper end of the tower tube. Lower the entire lifting device above the lower section of the tower tube to be lifted, so that the inner fixing ring extends into the inner cavity of the upper end of the tower tube, and the upper end of the tower tube is locked into the reserved gap between the outer fixing ring and the inner fixing ring to complete the initial positioning. Step 2: The upper end adaptive clamping and fixing is achieved by controlling the telescopic rod to drive the lifting plate to move upward. The slope of the lifting plate presses against the inclined slope of the inner side of each clamping slider, pushing all clamping sliders to extend outward synchronously, so that the arc-shaped extrusion plate is tightly attached to the arc-shaped inner wall of the upper end of the tower. Together with the outer fixing ring, the upper end of the tower is clamped and fixed, completing the adaptive centering and locking. Step 3: Fix the bottom of the tower tube. Attach multiple locking parts to the bottom section of the tower tube. Rotate the connecting ring to make the spiral rope wind around the outer circumference of the tower tube. Then, use high-strength bolts to lock the locking parts to the bolt holes reserved at the bottom of the tower tube, thus completing the bottom locking of the tower tube. Step 4: Overall lifting and docking. Hook the crane hook onto the wire rope loop in the center of the connecting plate, start the crane and pull the telescopic rod upward. At the same time, the outer fixed ring and the inner fixed ring fix the upper end face of the tower, and use multiple spiral ropes to limit the circumference of the tower from the outside to ensure the tower is lifted vertically and stably.

[0013] Compared with existing technologies, this segmented adaptive docking hoist and its hoisting method for wind turbine towers have the following advantages: By setting a synchronously pushable top-tightening slider in the inner fixing ring, the extension length can be adaptively adjusted according to the actual inner diameter of the tower, automatically completing the centering of the upper end of the tower without additional adjustment, making operation more convenient. At the same time, in conjunction with the outer fixing ring, the top of the tower can be clamped and fixed from both the inner and outer sides, preventing the top from swaying and shifting during hoisting. Furthermore, the bottom of the tower adopts a structure of locking parts and spiral rope. After the locking parts are engaged with the bottom section, rotating the connecting ring will allow the spiral rope to wrap around the outer wall of the tower, achieving both bottom support and all-round circumferential limiting of the tower from the outside. Combined with the top fixing structure, the entire tower remains vertical during hoisting, improving the stability and safety of the hoisting process, solving the problems of skewing and swaying that are prone to occur in traditional hoisting methods, and adapting to the docking hoisting of segmented towers of different sizes, with a wide range of applications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a segmented adaptive docking hoist for wind turbine towers according to the present invention. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the structure of a segmented adaptive docking hoist for wind turbine towers according to the present invention. Figure 2 .

[0016] Figure 3 This is a schematic diagram of the internal structure of a segmented adaptive docking hoist for wind turbine towers according to the present invention.

[0017] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the central part of the structure.

[0018] Figure 5 For the present invention Figure 1 A magnified structural diagram of point A in the middle.

[0019] Figure 6 For the present invention Figure 4 A magnified structural diagram at point B in the middle.

[0020] Figure 7 This is a schematic diagram illustrating the positional relationship between the outer and inner fixed rings in a segmented adaptive docking splice for wind turbine towers according to the present invention. Figure 1 .

[0021] Figure 8 This is a schematic diagram illustrating the positional relationship between the outer and inner fixed rings in a segmented adaptive docking splice for wind turbine towers according to the present invention. Figure 2 .

[0022] Figure 9 This is a schematic diagram of the bottom-support mechanism in a segmented adaptive docking hoist for wind turbine towers according to the present invention.

[0023] Figure 10 This is a schematic diagram showing the change in the state of the spiral sling caused by the rotation of the bottom-feeding mechanism in this invention.

[0024] Figure 11 This is a schematic diagram illustrating the cooperation between the spiral rope and the rolling ball in this invention.

[0025] In the diagram: 1. Steel hanging plate; 11. Lifting ring; 2. Outer fixing ring; 3. Inner fixing ring; 31. Tightening slider; 32. Pushing roller; 33. Arc-shaped extrusion plate; 4. Lifting plate; 41. Telescopic rod; 42. Connecting plate; 43. Wire rope ring; 44. Wire rope braid; 5. Bottom support mechanism; 51. High-strength bolt; 52. L-shaped limiting plate; 53. Inner extension section; 54. Outer extension section; 55. Gap; 56. Connecting ring; 6. Spiral rope; 61. Rolling ball; 7. Tower; 71. Bolt hole. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0027] Please refer to Figure 1-3 A segmented adaptive docking hoist for wind turbine towers includes a steel hoisting plate 1. An outer fixing ring 2 and an inner fixing ring 3 are coaxially fixed to the bottom surface of the steel hoisting plate 1. The space between the outer fixing ring 2 and the inner fixing ring 3 is used to place the tower 7. Multiple slots are arrayed around the inner fixing ring 3, and each slot contains a sliding block 31 that can extend outwards. The top circumference of the tower 7 is fixed between the outer fixing ring 2 and the inner fixing ring 3. A bottom-supporting mechanism is provided at the bottom of the tower 7. The bottom-supporting mechanism includes multiple lifting and limiting spiral ropes 6, which are spirally arranged around the outer wall of the tower 7.

[0028] During use, the top of the tower 7 is fixed between the outer fixing ring 2 and the inner fixing ring 3, and the bottom of the tower 7 is held by the bottom support mechanism. At the same time, the outer circumference of the tower 7 is limited by multiple rotating lifting ropes 6. This can ensure that the tower remains vertical during hoisting and avoid swaying and deviation. It can also adapt to towers with different inner diameters. Automatic centering is achieved by synchronously tightening the top sliding block 31, which reduces the difficulty of docking and alignment and improves the efficiency and safety of hoisting and docking.

[0029] Please refer to Figure 4 , Figure 6-8 The inner side of the clamping slider 3 is an inclined slope, and multiple extrusion rollers 32 are provided on the inclined slope 31. An integral arc-shaped extrusion plate 33 is fixed on the outer side of the clamping slider 31. The arc-shaped extrusion plate 33 contacts the arc-shaped inner wall of the tower 7, and the outer wall of the tower 7 contacts the inner wall of the outer fixing ring 2. In other words, when the pushing roller 32 is subjected to an upward pushing force, it pushes the clamping slider 31 to extend outward, converting sliding friction into rolling friction in this process. This reduces the pushing resistance and makes the process of multiple clamping sliders 31 extending synchronously smoother, ensuring the stability of clamping and fixing. The inner fixing ring 3 is provided with a lifting plate 4 inside. The lifting plate 4 is coaxially arranged with the inner fixing ring 3. The upper surface of the lifting plate 4 is provided with a slope that matches the top-tightening slider 31. A telescopic rod 41 is provided at the center of the lifting plate 4. A sleeve is fixed on the surface of the steel hanging plate 1. The telescopic rod 41 passes through the steel hanging plate 1 and extends upward inside the sleeve. The telescopic rod 41 can drive the lifting plate 4 to rise and fall synchronously by moving along the axial direction of the sleeve, thereby realizing the extension control of the top-tightening slider 31. The operation is simple and stable.

[0030] like Figure 1 , Figure 2 and Figure 9 The bottom support mechanism includes multiple engaging components, each including an L-shaped limiting plate 52. The surface of the L-shaped limiting plate 52 is provided with a vertically upward inner extension section 53 and an outer extension section 54. A gap 55 is left between the inner extension section 53 and the outer extension section 54. The gap 55 is used to engage the bottom section of the tower 7. The gap width between the inner extension section 53 and the outer extension section 54 is greater than the cross-sectional thickness of the tower to accommodate towers of different specifications. By inserting the gap 55 into the bottom edge of the tower, the lower end of the tower 7 can be stably pre-positioned, preventing structural displacement during the bottom fixing process and ensuring the accuracy of subsequent locking operations.

[0031] Multiple L-shaped limiting plates 52 are fixed together by connecting rings 56. The bottom surface of the L-shaped limiting plate 52 is provided with high-strength bolts 51. The high-strength bolts 51 are adapted to the bolt holes 71 at the bottom of the tower 7, and can be locked directly by using the pre-made connection structure of the tower 7.

[0032] Please refer to this again. Figure 4 and Figure 5 The steel crane 1 is provided with a lifting ring 11 on its surface. One end of the spiral rope 6 is fixedly connected to the outer extension section 54, and the other end passes through the steel crane plate 1 and is fixedly connected to the lifting ring 11. Therefore, when the lifting ring 11 is pulled upward, the spiral rope 6 can be tightened to prevent the spiral rope 6 from collapsing during hoisting and reduce the constraint force on the tower.

[0033] like Figure 10 As shown, the spiral rope 6 is in a vertical state under normal conditions. Figure 10 (Left) In this state, the spiral rope 6 falls naturally, and at this time the spiral rope 6 has no constraint on the outer circumference of the tower 7. Since the bottom end of the spiral rope 6 is fixedly connected to the outer extension section 54, when the connecting ring 56 rotates, the spiral rope 6 will form a spiral shape on the outer circumference of the tower cylinder 7 in the direction of rotation (e.g., Figure 10 (Right) Wrap around the outer circumference of the tower tube; thus forming a uniform circumferential clamping limit, which, together with the adaptive clamping structure (inner and outer fixing rings) at the upper end, keeps the tower tube 7 in a vertical position throughout the hoisting process, preventing the tower tube 7 from tilting and swaying due to its own center of gravity shift, and improving the stability during docking.

[0034] Please refer to this again. Figure 4-5 The top of the telescopic rod 41 is also fixed with a connecting plate 42. The connecting plate 42 is provided with through holes corresponding to the lifting rings 11. The connecting plate 42 is connected to the lifting rings 11 through the through holes via steel wire rope braids 44. A steel wire rope loop 43 with lifting holes is fixed at the center of the surface of the connecting plate 42. When the external lifting equipment pulls the connecting plate 42: On the one hand, since the wire rope ring 43, the connecting plate 42 and the telescopic rod 41 are fixed together, the telescopic rod 41 will pull the lifting plate 4 upward during lifting. At this time, the lifting plate 4 will continuously squeeze the top-tightening slider 31, so that the top-tightening force of the top-tightening slider 31 on the inner wall of the tower 7 will increase synchronously with the increase of the lifting weight. The greater the lifting weight, the stronger the top-tightening force and the higher the stability of the clamping and fixing. On the other hand, since the connecting plate 42 and the lifting ring 11 are connected by a wire rope braid 44, and the lifting ring 11 is fixed to the spiral hoist rope 6, when the connecting plate 42 moves upward, it can not only pull the lifting plate 4 to continuously squeeze and tighten the sliding block 31, but also tighten the spiral hoist rope 6 below, so that the circumferential clamping force of the spiral hoist rope 6 on the tower 7 increases synchronously with the lifting weight, further enhancing the structural stability during the hoisting process and preventing the tower from loosening during the hoisting process.

[0035] In other words, the hook-lifting wire rope locking ring 43 (connecting disc 42) can simultaneously improve the clamping of the top circumference of the tower 7, the circumferential clamping of the outer wall of the tower 7, and the bottom support of the tower 7. The greater the lifting weight, the greater the locking force of each part increases synchronously, the better the self-adaptive clamping effect, and the absence of additional manual clamping force, making the operation simpler and the safety performance higher.

[0036] Based on the above embodiments, in order to make the vertical spiral drawstring 6 quickly and evenly roll into a spiral shape automatically when the connecting ring 56 rotates; Therefore, multiple rolling balls 61 are threaded through each spiral helium rope 6, such as Figure 11 As shown, the rolling ball 61 can rotate on the spiral rope 6. When the connecting ring 56 rotates, the multiple rolling balls 61 can gradually roll along the outer wall of the tower 7 in the direction of rotation of the spiral rope 6, causing the spiral rope 6 to be evenly wound around the outer circumference of the tower 7, avoiding local knotting and twisting of the rope, ensuring the uniformity of spiral winding, making the clamping force of each area on the outer wall of the tower more uniform and consistent, and further improving the stability of clamping and limiting.

[0037] Furthermore, the hoisting method for the segmented adaptive docking spreader of the wind turbine tower includes the following steps: Step 1: Positioning the upper end of the tower tube. Lower the entire lifting device above the lower section of the tower tube to be lifted, so that the inner fixing ring extends into the inner cavity of the upper end of the tower tube, and the upper end of the tower tube is locked into the reserved gap between the outer fixing ring and the inner fixing ring to complete the initial positioning. Step 2: The upper end adaptive clamping and fixing is achieved by controlling the telescopic rod to drive the lifting plate to move upward. The slope of the lifting plate presses against the inclined slope of the inner side of each clamping slider, pushing all clamping sliders to extend outward synchronously, so that the arc-shaped extrusion plate is tightly attached to the arc-shaped inner wall of the upper end of the tower. Together with the outer fixing ring, the upper end of the tower is clamped and fixed, completing the adaptive centering and locking. Step 3: Fix the bottom of the tower tube. Attach multiple locking parts to the bottom section of the tower tube. Rotate the connecting ring to make the spiral rope wind around the outer circumference of the tower tube. Then, use high-strength bolts to lock the locking parts to the bolt holes reserved at the bottom of the tower tube, thus completing the bottom locking of the tower tube. Step 4: Overall lifting and docking. Hook the crane hook onto the wire rope loop in the center of the connecting plate, start the crane and pull the telescopic rod upward. At the same time, the outer fixed ring and the inner fixed ring fix the upper end face of the tower, and use multiple spiral ropes to limit the circumference of the tower from the outside to ensure the tower is lifted vertically and stably.

[0038] When the segmented adaptive docking spreader for wind turbine towers is installed, the upper end of the tower is clamped and fixed by the outer fixing ring 2, the inner fixing ring 3 and the synchronously extending top-tightening slider. At the same time, the synchronous extension of multiple top-tightening sliders can automatically center the tower, ensuring that the upper end of the tower 7 is coaxial with the spreader, avoiding the upper end from tilting during installation and reducing the difficulty of subsequent docking and alignment. For the lower end of the tower, a locking component is inserted into the bottom section and locked in conjunction with the original bolt holes of the tower to achieve stable bottom support and prevent the tower from slipping out of the lifting equipment during the hoisting process; For the outer circumference of the tower, the spiral rope 6, which can be spirally wound, forms a uniform circumferential clamping. The greater the lifting weight, the higher the clamping force and the clamping force of the rope increase simultaneously, resulting in a better adaptive clamping effect. This ensures that the tower 7 maintains a vertical posture throughout the process, avoiding swaying and displacement during the hoisting process, and greatly improving the efficiency and safety performance of the segmented hoisting and docking of wind turbine towers.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A segmented adaptive docking hoist for wind turbine towers, characterized in that, The system includes a steel hanging plate, on the bottom surface of which are fixed an outer fixing ring and an inner fixing ring arranged coaxially. The space between the outer and inner fixing rings is used to place the tower. Multiple slots are arranged around the inner fixing ring, and each slot contains a sliding block that can extend outward. The top circumference of the tower is fixed between the outer and inner fixing rings. The bottom of the tower is provided with a bottom-supporting mechanism, which includes multiple spiral lifting and limiting ropes arranged in a spiral shape around the outer wall of the tower.

2. The wind turbine tower segmented adaptive docking lifting tool according to claim 1, characterized in that, The inner side of the clamping slider is an inclined slope, and multiple extrusion rollers are provided on the inclined slope. An integral arc-shaped extrusion plate is fixed on the outer side of the clamping slider. The arc-shaped extrusion plate contacts the arc-shaped inner wall of the tower, and the outer wall of the tower contacts the inner wall of the outer fixing ring.

3. The wind turbine tower segmented adaptive docking hoist according to claim 2, characterized in that, The inner fixing ring is provided with a lifting plate inside. The lifting plate is coaxially arranged with the inner fixing ring. The upper surface of the lifting plate is provided with a slope that matches the tightening slider. A telescopic rod is provided at the center of the lifting plate. A sleeve is fixed on the surface of the steel hanging plate. The telescopic rod passes through the steel hanging plate and extends upward inside the sleeve.

4. The wind turbine tower segmented adaptive docking hoist according to claim 1, characterized in that, The bottom-mounting mechanism includes multiple locking components, each including an L-shaped limiting plate. The surface of the L-shaped limiting plate is provided with an inner extension section and an outer extension section that extend vertically upwards. A gap is left between the inner extension section and the outer extension section, and the gap is used to lock the bottom section of the tower cylinder.

5. The wind turbine tower segmented adaptive docking hoist according to claim 4, characterized in that, Multiple L-shaped limiting plates are fixed together as one unit by connecting rings. The bottom surface of the L-shaped limiting plates is provided with high-strength bolts, which are adapted to the bolt holes at the bottom of the tower.

6. The wind turbine tower segmented adaptive docking lifting tool according to claim 5, characterized in that, The surface of the steel hanging plate is provided with a lifting ring. One end of the spiral rope is fixedly connected to the outer extension section, and the other end passes through the steel hanging plate and is fixedly connected to the lifting ring. Under normal conditions, the spiral rope is in a vertical state. When the connecting ring rotates, the spiral rope is wound around the outer circumference of the tower.

7. The wind turbine tower segmented adaptive docking lifting tool according to claim 3, characterized in that, The top of the telescopic rod is also fixed with a connecting plate. The connecting plate is surrounded by through holes that correspond one-to-one with the lifting rings. The connecting plate is connected to the lifting rings through the through holes by a wire rope braid. A wire rope loop with a lifting hole is fixed at the center of the surface of the connecting plate.

8. A method for hoisting a segmented adaptive docking lifting device for wind turbine towers according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Positioning the upper end of the tower tube. Lower the entire lifting device above the lower section of the tower tube to be lifted, so that the inner fixing ring extends into the inner cavity of the upper end of the tower tube, and the upper end of the tower tube is locked into the reserved gap between the outer fixing ring and the inner fixing ring to complete the initial positioning. Step 2: The upper end adaptive clamping and fixing is achieved by controlling the telescopic rod to drive the lifting plate to move upward. The slope of the lifting plate presses against the inclined slope of the inner side of each clamping slider, pushing all clamping sliders to extend outward synchronously, so that the arc-shaped extrusion plate is tightly attached to the arc-shaped inner wall of the upper end of the tower. Together with the outer fixing ring, the upper end of the tower is clamped and fixed, completing the adaptive centering and locking. Step 3: Fix the bottom of the tower tube. Attach multiple locking parts to the bottom section of the tower tube. Rotate the connecting ring to make the spiral rope wind around the outer circumference of the tower tube. Then, use high-strength bolts to lock the locking parts to the bolt holes reserved at the bottom of the tower tube, thus completing the bottom locking of the tower tube. Step 4: Overall lifting and docking. Hook the crane hook onto the wire rope loop in the center of the connecting plate, start the crane and pull the telescopic rod upward. At the same time, the outer fixed ring and the inner fixed ring fix the upper end face of the tower, and use multiple spiral ropes to limit the circumference of the tower from the outside to ensure the tower is lifted vertically and stably.

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