Truss combined type fan hoisting system

Abstract

The utility model belongs to the technical field of fan tower hoisting, and particularly relates to a truss combined type fan hoisting system. The hoisting system comprises a tower crane foundation, a tower crane body, an auxiliary support, a transverse support and a tower crane mechanism, wherein the tower crane body and the auxiliary support are fixed on the tower crane foundation; the tower crane mechanism is mounted at the upper part of the tower crane body; the tower crane body, the auxiliary support and the fan supporting structure are connected with one another through transverse supports; and the tower crane body and the auxiliary support have the same structure and adopt a multi-section combination form. The utility model is suitable for the installation and construction of a novel truss combined type wind turbine unit, and can greatly reduce the construction difficulty, reduce the construction cost and improve the reutilization efficiency and the installation efficiency of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine tower hoisting technology, and particularly relates to a truss-type combined wind turbine hoisting system. Background Technology

[0002] As an important renewable and clean energy source, wind power is gradually increasing its share of China's energy consumption. Early-built wind farms are reaching the end of their service life, and some wind turbines are facing the challenge of maintenance and replacement. Therefore, both new wind farms and the renovation of old ones require larger turbines to save construction costs and improve power generation efficiency.

[0003] Traditional circular steel tower support structures are simple in structure and easy to install and maintain. However, with the trend towards larger structures, increasing their structural stiffness becomes difficult. As the required height continues to increase, the structure needs a larger base diameter and wall thickness, posing a significant challenge in structural installation. To overcome these problems, concrete towers, steel-concrete composite towers, truss supports, and truss composite support structures have been proposed and widely applied in practice. Among them, truss composite support structures offer high lateral stiffness, standardized components, and minimal site area requirements, making them highly valuable.

[0004] In wind turbine structure installation, traditional methods rely on large tire cranes and crawler cranes. However, as wind turbine installation height increases, conventional crawler cranes struggle to reach the desired height, and their maximum lifting capacity gradually decreases with increasing height. Therefore, cranes with greater lifting capacity and extension length are required during installation, and these methods are subject to stringent construction environment and operating conditions. Furthermore, the rental and use costs of such large equipment are substantial, significantly increasing the overall installation cost. For truss-type wind towers, which can reach heights exceeding 190 meters and have some components weighing over 100 tons, traditional crawler cranes are insufficient to meet the installation and construction requirements.

[0005] Tower cranes, commonly used in building construction, are easy to install, all components are standardized, they can lift large loads, have high construction efficiency, and are less demanding on the construction environment. Based on these advantages, their application in wind turbine installation can be considered to improve installation efficiency, facilitate equipment recycling, and reduce the complexity and risks of the construction process. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a truss-type combined wind turbine hoisting system, which solves the problems of insufficient hoisting height and weight, high installation costs, and high requirements for the construction environment associated with traditional crawler cranes.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a truss-type combined wind turbine hoisting system, including: a tower crane foundation, a tower crane body, auxiliary supports, lateral supports, and a tower crane mechanism; wherein, the tower crane body and auxiliary supports are fixed on the tower crane foundation; the tower crane mechanism is installed on the upper part of the tower crane body; the tower crane body, auxiliary supports, and wind turbine support structure are connected to each other through lateral supports; the tower crane body and auxiliary supports have the same structure and both adopt a multi-segment combination form; the tower crane mechanism is a single tower crane mechanism, a single tower crane-auxiliary support mechanism, or a double tower crane mechanism.

[0008] Preferably, the tower wind turbine support structure is connected to the tower crane tower body and the wind turbine support structure and the auxiliary support through a first transverse support, which is a truss structure composed of hollow steel pipes or steel sections.

[0009] Preferably, the tower crane body and the auxiliary support are connected by a third lateral support, which is a truss structure composed of hollow steel pipes or steel sections.

[0010] Preferably, the tower crane body and the wind turbine tower, and the wind turbine tower and the auxiliary support are connected by a second transverse support and a circumferential clamp. The second transverse support is a truss structure composed of hollow steel pipes or structural steel, one end of which is connected to the wind turbine tower through a circumferential clamp, and the other end is fixed to the tower crane body and the auxiliary support. The circumferential clamp includes two sets of radial rings and vertical connecting rods connecting the rings.

[0011] This utility model also provides another truss-type combined wind turbine hoisting system, which includes a lifting system support and a self-lifting mechanism; the lifting system support is arranged around the wind turbine truss support structure; the lifting system support and the wind turbine truss support structure are connected by lateral supports; the self-lifting mechanism includes a sling support, slings, a lifting system boom, and a lifting trolley; the lifting system boom is horizontally installed on the upper part of the lifting system support, the sling support is fixed on both sides to the upper part of the lifting system support and is arranged perpendicular to the lifting system boom, and the lifting system boom is fixed to the sling support by slings; a configuration block is arranged at one end of the lifting system boom and a lifting trolley is installed at the other end.

[0012] Preferably, the lifting system support includes a lifting support truss and a jacking mechanism; the lifting system support truss is composed of multiple segments, and its height is increased by the jacking mechanism; adjacent lifting system support trusses are connected by a fifth transverse support.

[0013] Preferably, the lifting system support truss is connected to the wind turbine tower via a fourth lateral support and circumferential clamps.

[0014] This utility model is applicable to the installation and construction of a new type of truss combined wind turbine unit, which can significantly reduce construction difficulty, reduce construction costs, and improve the reusability and installation efficiency of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the single tower crane foundation installation in Example 1;

[0016] Figure 2 This is a schematic diagram of the installation of the wind turbine truss section and the lateral support of the tower crane body in Example 1;

[0017] Figure 3 This is a schematic diagram of the hoisting of the wind turbine truss section in Example 1;

[0018] Figure 4 This is a schematic diagram of the installation of the wind turbine round steel tower section and the lateral support of the tower crane body in Example 1;

[0019] Figure 5 This is a schematic diagram of the fan switching section in Example 1;

[0020] Figure 6 This is a schematic diagram of the circumferential clamping of the circular steel tower section of the wind turbine in Example 1;

[0021] Figure 7 This is a schematic diagram of the wind turbine blade hoisting in Example 1;

[0022] Figure 8 This is a schematic diagram of the installation of the wind turbine and tower crane foundation in Example 2;

[0023] Figure 9 This is a schematic diagram of the bottom segment of the wind turbine truss and the tower crane installation in Example 2;

[0024] Figure 10 This is a schematic diagram of the installation of the wind turbine truss section and the lateral support of the tower crane body in Example 2;

[0025] Figure 11 This is a schematic diagram of the hoisting of the wind turbine truss section in Example 2;

[0026] Figure 12 This is a schematic diagram of the installation of the wind turbine conversion section and the lifting by the tower crane in Example 2;

[0027] Figure 13 This is a schematic diagram of the installation of the wind turbine round steel tower section and the lateral support of the tower crane body in Example 2;

[0028] Figure 14 This is a schematic diagram of the hoisting of the upper nacelle and hub of the wind turbine in Example 2;

[0029] Figure 15 This is a schematic diagram of the wind turbine blade hoisting in Example 2;

[0030] Figure 16 This is a schematic diagram of the double tower crane arrangement for the wind turbine in Example 3;

[0031] Figure 17 This is a schematic diagram of the wind turbine truss segment being hoisted by a double tower crane in Example 3;

[0032] Figure 18 This is a schematic diagram of the upper nacelle and hub of the wind turbine being hoisted by a twin-tower crane in Example 3;

[0033] Figure 19 This is a schematic diagram of the installation of the bottom segment of the wind turbine truss and the hoisting system in Example 4;

[0034] Figure 20 This is a schematic diagram of the stage hoisting of the wind turbine truss in the self-lifting scheme of Example 4;

[0035] Figure 21 This is a schematic diagram of the lifting and installation of the circular steel tower in the self-lifting hoisting system of Example 4;

[0036] Figure 22 This is a schematic diagram of the nacelle installation of the self-lifting scheme in Example 4;

[0037] Figure 23 This is a schematic diagram of the blade hoisting in the self-lifting scheme of Example 4;

[0038] Figure 24 This is a schematic diagram showing the completed installation of the truss-type fan in Example 4;

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Wind turbine foundation; 2-Tower crane foundation; 3-Wind turbine truss support; 301-Circular column; 302-Diagonal web member; 303-Horizontal web member; 304-Horizontal short member; 4-Tower crane tower body segment; 5-First tower crane; 501-Tower crane jacking mechanism; 502-Tower crane operator's cab; 503-Tower crane slewing mechanism; 504-Tower crane counterweight boom; 505-Tower crane jib; 506-Lifting trolley; 6-First transverse support; 7-Second transverse support; 8-Transition segment; 801-Corner column; 802-Box girder; 803-Foundation unit; 804-Upper flange; 9-Circular steel tower cylinder; 10-Circular clamp; 1001-Radial... 1002-Clamping bolt; 1003-Vertical connecting rod; 11-Nacelle; 12-Hub; 13-Blade; 14-Blade clamp; 15-Auxiliary support section; 16-Third lateral support; 17-Second tower crane; 18-Lifting system support; 1801-Lifting system support truss; 1802-Lifting system jacking mechanism; 19-Self-lifting mechanism; 1901-Lifting system boom; 1902-Sling; 1903-Lifting system support truss; 1904-Sling support; 1905-Configuration block; 1906-Self-lifting system trolley; 20-Fourth lateral support; 21-Fifth lateral support. Detailed Implementation

[0041] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0042] Example 1 The truss-type combined wind turbine hoisting system provided in this example, such as Figure 1-7 As shown, the structure includes a tower crane foundation 2, a tower crane body 4, a first tower crane mechanism 5, a first lateral support 6, and a second lateral support 7. The first tower crane mechanism 5 includes: 501 - tower crane lifting mechanism; 502 - tower crane operator's cab; 503 - tower crane slewing mechanism; 504 - tower crane counterweight boom; 505 - tower crane lifting boom; and 506 - lifting trolley.

[0043] The tower crane body 4 is fixed on the tower crane foundation 2; the tower crane mechanism 5 is installed on the upper part of the tower crane body 4.

[0044] The tower crane tower body 4 and the wind turbine truss support 3 are connected by a first transverse support 6, which is a truss structure composed of hollow steel pipes or structural steel. Figure 2 The single-layer X-shaped truss form shown.

[0045] The tower crane tower body 4 and the round steel tower cylinder 9 are connected by a second transverse support 7 and a circumferential clamp 10. The second transverse support 7 is composed of hollow steel pipes or structural steel sections, such as... Figure 10 The straight truss structure shown has one end connected to the round steel tower 9 via a circumferential clamp 10, and the other end fixed to the tower crane body 4.

[0046] The tower crane lifting mechanism 501 is located on the upper part of the tower crane body 4 and is used to raise the height of the tower crane body 4. The tower crane operator's cab 502 is located above the tower crane lifting mechanism 501. The tower crane slewing mechanism 503, the tower crane counterweight boom 504, the tower crane jib 505, and the crane trolley 506 are connected in a conventional manner.

[0047] The truss-type combined wind turbine hoisting system provided in this embodiment uses a single tower crane to hoist the truss-type combined wind turbine, including steps such as truss and tower crane pre-assembly, support structure hoisting, wind turbine and hoisting system lifting, upper unit hoisting, and hoisting system dismantling. The specific process is as follows:

[0048] (1) For example Figure 1-2 As shown, the wind turbine foundation 1 and tower crane foundation 2 are poured. Wind turbine foundation 1 is a pile foundation, containing piles and pile caps connected by crossbeams and poured with concrete. Tower crane foundation 2 consists of two parts, positioned leeward from the wind turbine and symmetrically positioned to the center of the tower. The length of the tower crane counterweight 504 and the distance between the tower crane and the wind turbine truss support structure are adjusted according to the tower crane's counterweight boom 504 and the distance between the tower crane and the wind turbine truss support structure. The type of tower crane foundation 2 can be selected based on the site conditions, including slab foundations, cross foundations, pile foundations, and composite foundations, and is designed according to different construction loads, using concrete for pouring. Tower crane foundation 2 is used to fix the tower crane tower body 4, located symmetrically in the middle of the wind turbine. After the wind turbine foundation 1 is poured, a small crane is used to hoist the bottom wind turbine truss support 3 to the installation position and fix it to the corresponding foundation pile cap with fixing bolts. The wind turbine truss support 3 consists of multiple identical segments, each with the same height. Each segment includes four outer circular columns 301, several diagonal web members 302, horizontal web members 303, and horizontal short members 304. The wind turbine truss support 3 is modularly prefabricated in the factory and transported to the base of the wind turbine tower for on-site assembly. After this, a small crane is used to lift the segments of the tower crane body 4 and install the upper mechanisms of the first tower crane mechanism 5, including the tower crane lifting mechanism 501, the tower crane operator's cab 502, the tower crane slewing mechanism 503, the tower crane counterweight boom 504, the tower crane jib 505, and the crane trolley 506.

[0049] (2) For example Figure 2-3As shown, after the wind turbine truss support 3 and the tower crane body 4 are installed, first transverse supports 6 are installed between the two sides of the first tower crane mechanism 5 and the two sides of the wind turbine truss support 3. The first transverse supports 6 are located at the ends and fixed by bolts so that they can transmit the lateral forces between them, making the structure in the same plane and forming a planar triangle to maintain the stability between the first tower crane mechanism 5 and the wind turbine truss support 3.

[0050] (3) such as Figure 3-4 As shown, the first tower crane mechanism 5 continuously lifts segments of the wind turbine truss support 3, increasing the height of the wind turbine support structure. During the lifting process, the first transverse support 6 is arranged along a fixed height to maintain structural stability under construction conditions. After the wind turbine truss support 3 is lifted, the transition segment 8 is lifted from its top. However, due to the large mass of the transition segment 8, it is difficult to lift it all at once. Therefore, it can be divided into four sectors, each sector is lifted separately, and then they are installed as a unified whole after being lifted.

[0051] (4) such as Figure 5 As shown, the structure of transition segment 8 includes corner columns 801, box girder 802, foundation unit 803, and upper flange 804. The number of corner columns 801 is the same as the number of circular columns 301, and they are bolted to the frame support columns 301. The box girder 802 is fan-shaped, connecting the corner columns 801 and the foundation unit 803. The foundation unit 803 is an arc-shaped plate structure, and multiple arc-shaped plate structures are assembled into a frustum-shaped structure. The upper flange 804 is located at the upper end of the foundation unit 803 for connection to the circular steel tower 9.

[0052] (5) such as Figure 4 As shown, after the conversion segment 8 is hoisted, the circular steel tower 9 of the wind turbine is hoisted in sections. A second transverse support 7 is arranged between the circular steel tower 9 and the tower crane body 4. One end of the second transverse support 7 is connected to the circular steel tower 9 of the wind turbine through a circumferential clamp 10, and the other end is fixed to the tower crane body 4 with bolts.

[0053] (7) For example Figure 6As shown, the circumferential clamp 10 includes two sets of radial rings 1001 and interconnected vertical connecting rods 1003. The radial rings 1001 consist of two semi-circular steel beams, fitted around the outer perimeter of the circular steel tower 9. The radial rings are connected by clamp bolts 1002 and are kept securely fastened to the circular steel tower 9 by adjusting their tightness. Bolt holes are arranged on the outer side of the radial rings 1001 to fix them to the second transverse support 7. The vertical connecting rods 1003 are arranged at the upper and lower ends of the radial rings 1001 to maintain a stable connection and prevent the radial rings 1001 from shifting. The second transverse support 7 is hoisted using the first tower crane mechanism 5 after the wind turbine circular steel tower 9 and tower crane body 4 are installed. The circumferential clamp 10 is pre-assembled with the circular steel tower 9 and then hoisted together with the circular steel tower 9. After hoisting is completed, the second transverse support 7 is installed.

[0054] (8) such as Figure 7 As shown, after the wind turbine truss support 3, the transition section 8, and the circular steel tower 9 are installed and stabilized by lateral supports, the first tower crane mechanism 5 is further raised so that the tower crane boom 505 is higher than the nacelle 11. The nacelle 11 and hub 12 of the wind turbine unit are then hoisted in sequence. When hoisting the blades 13, the position of the tower crane boom 505 is adjusted to the side of the unit, and the blades 13 are hoisted using the blade clamps 14 to install them onto the hub 12. Then, the angle of the installed blades is rotated and adjusted, and the remaining blades are hoisted until all blades are installed.

[0055] (9) After all the structures of the wind turbine have been hoisted, the second transverse support 7 and the first transverse support 6 are dismantled in sequence using the first tower crane mechanism 5. Then, the upper structure and tower body of the first tower crane mechanism 5 are removed using a ground crane. During the dismantling of the second transverse support 7, the clamping bolts 1002 of the circumferential clamp 10 should be loosened first to disassemble it into multiple parts and separate it from the round steel tower 9 to avoid damaging the round steel tower 9.

[0056] Example 2 The truss-type wind turbine hoisting system provided in this example includes, in addition to the first tower crane mechanism 5, an auxiliary support 15 and a third transverse support 16.

[0057] Considering the insufficient lateral stability of a single tower crane during installation, this embodiment adds a set of auxiliary supports next to the original tower crane to improve lateral stiffness and thus ensure the safety of the wind turbine construction process. Using the truss-type combined wind turbine hoisting system provided in this embodiment, a single tower crane-auxiliary support method is employed to hoist the truss-type combined wind turbine, including steps such as truss and tower crane pre-assembly, support structure hoisting, wind turbine and hoisting system lifting, upper unit hoisting, and hoisting system dismantling. The specific process is as follows:

[0058] (1) For example Figure 8-9As shown, the tower crane foundation 2 comprises two parts, positioned leeward of the wind turbine and symmetrically positioned relative to the center of the tower. One part of the tower crane foundation 2 is used to secure the tower crane body 4, while the other is used to secure the auxiliary support 5. The auxiliary support 5 has the same structure as the tower crane body 4, assisting in maintaining the stability of the tower crane and the wind turbine. After the wind turbine foundation 1 is poured, the wind turbine truss support 3 is prefabricated modularly in the factory and transported to the base of the wind turbine tower for on-site assembly. Subsequently, a small crane is used to lift the sections of the tower crane body 4 and the auxiliary support 15, and the upper mechanism of the first tower crane mechanism 5 is installed.

[0059] (2) For example Figure 10 As shown, after the wind turbine truss support 3 and the tower crane body 4 are installed, the first lateral support 6 and the third lateral support 16 are installed through the first tower crane mechanism 5. The first lateral support 6 connects the wind turbine truss section 3 to the tower crane body 4 and the wind turbine truss section 3 to the auxiliary support 15, and its ends are fixed with bolts to allow it to transmit lateral forces between them. The third lateral support 16 connects the tower crane body 4 and the auxiliary support 15, and its ends are also fixed with bolts to transmit lateral forces between them. The first lateral support 6 and the third lateral support 16 are arranged in the same plane, forming a planar triangle to maintain the stability between the first tower crane mechanism 5, the wind turbine truss support 3, and the auxiliary support 15.

[0060] (3) such as Figure 11-12 As shown, the first tower crane mechanism 5 continuously lifts segments of the wind turbine truss support 3, increasing the height of the wind turbine support structure. During the lifting process, the first transverse support 6 and the third transverse support 16 are arranged along a fixed height to maintain structural stability under construction conditions. After the wind turbine truss support 3 is lifted, the conversion segment 8 is lifted from its top.

[0061] (4) such as Figure 13 As shown, after the conversion segment 8 is hoisted, the circular steel tower 9 of the wind turbine is hoisted in sections. A second transverse support 7 is arranged between the circular steel tower 9 and the tower crane body 4, and between the circular steel tower 4 and the auxiliary support 15.

[0062] (8) such as Figure 14-15 As shown, after the wind turbine truss support 3, the transition section 8, and the circular steel tower 9 are installed and stabilized by lateral supports, the first tower crane mechanism 5 is further raised so that the tower crane boom 505 is higher than the nacelle 11. The nacelle 11 and hub 12 of the wind turbine unit are then hoisted in sequence. When hoisting the blades 13, the position of the tower crane boom 505 is adjusted to the side of the unit, and the blades 13 are hoisted using the blade clamps 14 to install them onto the hub 12. Then, the angle of the installed blades is rotated and adjusted, and the remaining blades are hoisted until all blades are installed.

[0063] (9) After all the structures of the wind turbine are hoisted, the second horizontal support 7, the auxiliary support 15, the third horizontal support 16 and the first horizontal support 6 are removed in sequence using the first tower crane 5. Then, the upper structure and tower body of the first tower crane mechanism 5 are removed and unloaded using a ground crane.

[0064] Example 3 The truss-type wind turbine hoisting system provided in this example has a structure that is basically the same as that in Example 2. In fact, this example includes two hoisting systems as described in Example 2, namely two tower crane mechanisms, namely the first tower crane mechanism 5 and the second tower crane mechanism 17.

[0065] Considering the insufficient lifting capacity and stability of a single tower crane, this embodiment employs two tower cranes to hoist the truss-type combined wind turbine. The process includes pre-assembly of the truss and tower cranes, hoisting of the support structure, lifting of the wind turbine and hoisting system, hoisting of the upper turbine unit, and dismantling of the hoisting system. The specific process is as follows:

[0066] (1) such as Figure 16 As shown, the pre-assembly process of the truss and tower crane is the same as in Example 2, except that the two tower crane foundations 2 are used to house the tower crane bodies 4 of the first tower crane mechanism 5 and the second tower crane mechanism 17. The lifting capacity required for the first tower crane mechanism 5 and the second tower crane mechanism 17 is smaller than that of the tower crane in Example 2, thus reducing the requirements for the tower crane. During the assembly of the tower crane segments, the height of the second tower crane mechanism 17 should be reduced so that the plane height of its boom is lower than that of the boom of the first tower crane mechanism 5, to avoid collisions in space and potential engineering accidents.

[0067] (2) For example Figure 17 As shown, the hoisting of the lateral support structure is the same as in Embodiment 1. The difference is that one end of the first lateral support 6 is connected to the wind turbine truss support 3, and the other end is connected to the tower body 4 of the first tower crane mechanism 5 and the second tower crane mechanism 17; the second lateral support 16 is connected to the tower body 4 of the first tower crane mechanism 5 and the second tower crane mechanism 17; the hoisting of the second lateral support 7 is connected to the round steel tower 9 at one end and to the tower body of the first tower crane mechanism 5 and the second tower crane mechanism 17 at the other end.

[0068] (3) such as Figure 18As shown, during the lifting of the wind turbine and hoisting device, and the hoisting of the upper unit, the first tower crane mechanism 5 and the second tower crane mechanism 17 sequentially hoist the sections of the wind turbine truss support 3, the transition section 8, and the round steel tower 9. During the hoisting process, the two tower crane mechanisms should be at different heights. By adjusting the angle of the lifting boom and the length of the lifting trolley slings, and using clamps or slings, the sections of the wind turbine truss support 3 are simultaneously lifted to the correct position for installation. Furthermore, the tower crane section lifting and lateral support connection are the same as in Example 2. For the hoisting of the upper unit, the dismantling after hoisting is the same as the steps in the example.

[0069] Example 4 This example provides a truss-type wind turbine hoisting system, comprising a lifting system support 18 and a self-lifting mechanism 20. The lifting system support 18 includes lifting system support trusses 1801 and a lifting system jacking mechanism 1802. Four lifting system support trusses 1801 are arranged around the wind turbine truss support 3. The lifting system support trusses 1801 are composed of multiple segments. The lifting system jacking mechanism 1802 is used to hoist the segments of the lifting system support trusses 1801, increasing their height. Adjacent lifting system support trusses 1801 are connected by a fifth transverse support 21. The fifth transverse support 21 has a truss structure, similar to or the same as the structure of the lifting system support trusses 1801. The lifting system support trusses 1801 are connected to the circular steel tower 9 by a fourth transverse support 20 and a circumferential clamp 10. The circular columns 301 of the wind turbine truss support 3 are connected to the lifting system support trusses 1801 by the fourth transverse support 20.

[0070] The self-lifting mechanism 19 includes a lifting system support truss 1903, a sling support 1904, a sling 1902, a lifting system boom 1901, and a lifting trolley 1906. The lifting system boom 1901 is horizontally installed on the lifting system support truss 1903, which is installed on the upper part of the lifting system support 18. The sling support 1904 is fixed on both sides to the upper part of the lifting system support 18 and is arranged perpendicular to the lifting system boom 1901. The lifting system boom 1901 is fixed to the sling support 1904 by the sling 1902. A configuration block 1905 is arranged at one end of the lifting system boom 1901, and the lifting trolley 1906 is installed at the other end.

[0071] The lifting system support truss 1801 and lifting system jacking mechanism 1802 in this embodiment have the same structure and principle as the tower crane body 4 and tower crane jacking mechanism 501 in embodiments 2 and 3. The self-lifting mechanism 19 is similar to the tower crane mechanism in embodiments 2 and 3, and the principle is basically the same.

[0072] In this embodiment, a self-lifting method is used to hoist the truss-type combined wind turbine, including the steps of pre-assembly of the truss and lifting system, hoisting of the support structure, lifting of the wind turbine and hoisting device, hoisting of the upper unit, and dismantling of the hoisting device. The specific process is as follows:

[0073] (1) such as Figure 19 As shown, after the wind turbine foundation 1 is poured, the bottom wind turbine truss support 3 is installed on the upper part using a small crane, and the lifting system support 18 is installed on the wind turbine foundation 1. A fourth set of transverse supports 20 is used to fix the wind turbine truss support 3 and the lifting system support 18 between them, and these supports are set at intervals to ensure the stability of the lifting system support 18 under lateral loads. The lifting system support truss 1903 is fixed to the lifting system jacking mechanism 1802 with bolts, and then the sling support 1904 and the lifting system boom 1901 are installed. Afterwards, configuration blocks 1905 and lifting trolleys 1906 are placed at the front and rear ends of the lifting system boom 1901.

[0074] (2) For example Figure 20-21 As shown, the wind turbine truss support 3 is continuously lifted to the installation height via the self-lifting mechanism 19, and then moved horizontally by the crane trolley 1906 to align it with the bottom truss end for easy installation. After the current component is installed, the lifting system jacking mechanism 1802 is used to lift and embed the truss segment of the lifting system support truss 1801, thereby continuously increasing the height of the self-lifting mechanism 19. The wind turbine truss support 3, the conversion segment 8, and the circular steel tower 9 segment are installed in this cyclical manner. The circular steel tower 9 and the lifting system support truss 1801 are connected by a circumferential clamp 10 and a fourth transverse support 20, and adjacent lifting system support trusses 1801 are connected by a fifth transverse support 21. All transverse supports are kept in the same plane and are set at intervals to maintain the stability of the structure and its resistance to lateral collapse.

[0075] (3) such as Figure 22-23 As shown, the height of the self-lifting mechanism 19 is continuously increased by jacking, lifting the wind turbine components and moving them to the installation position. After the wind turbine's support structure is installed, the height of the self-lifting mechanism 19 is raised above the nacelle 11, and the nacelle 11 is lifted and installed. Subsequently, the hub 12 and blades 13 are assembled on the ground and fixed using appropriate clamps. A small ground crane is used to keep the hub 12 and blades 13 on the same plane to avoid collisions with other structures. The self-lifting mechanism 19 is then used to slowly lift and move the components to the center of the nacelle 11 for installation.

[0076] (4) After all components of the generator set are installed, the horizontal support device, the lifting system support, and the self-lifting mechanism are dismantled in sequence. For the dismantling of the horizontal support, after all components of the generator set are installed, the fourth horizontal support 20, the circumferential clamp 10, and the fifth horizontal support 21 are gradually dismantled from top to bottom, so that the round steel tower 9, the wind turbine truss support 3 and the lifting system support truss 1801 are disconnected from each other, and the self-lifting mechanism 19 is used to lift them to the ground. For the dismantling of the lifting system support, the sections of the lifting system support truss 1801 are extracted from the lifting system jacking mechanism 1802 from top to bottom, and the self-lifting mechanism 19 is used to lift them to the bottom, thereby gradually reducing the height of the self-lifting mechanism 19. For the dismantling of the self-lifting mechanism 19, after the self-lifting mechanism is lowered sufficiently, the various components on the upper part are removed using a ground-based small crane.

[0077] The embodiments described are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essential content of the present invention shall fall within the protection scope of the present invention.

Claims

1. A truss-type combined wind turbine hoisting system, characterized in that, include: Tower crane foundation, tower crane body, auxiliary supports, lateral supports, and tower crane mechanism; among which, the tower crane body and auxiliary supports are fixed to the tower crane foundation; The tower crane mechanism is installed on the upper part of the tower crane body; the tower crane body, auxiliary supports and wind turbine support structure are connected to each other by lateral supports; the tower crane body and auxiliary supports have the same structure and both adopt a multi-segment combination form; the tower crane mechanism is a single tower crane mechanism, a single tower crane-auxiliary support mechanism or a double tower crane mechanism.

2. The truss-type combined wind turbine hoisting system according to claim 1, characterized in that, The tower crane body, auxiliary supports, and wind turbine support structure are connected by a first transverse support, which is a truss structure composed of hollow steel pipes or steel sections.

3. The truss-type combined wind turbine hoisting system according to claim 1, characterized in that, The tower crane body and the wind turbine tower, and the wind turbine tower and the auxiliary support are connected by a second transverse support. The second transverse support is a truss structure composed of hollow steel pipes or steel sections. One end of the support is connected to the wind turbine tower through a circumferential clamp, and the other end is fixed to the tower crane body and the auxiliary support. The circumferential clamp includes two sets of radial rings and vertical connecting rods connecting the rings.

4. The truss-type combined wind turbine hoisting system according to claim 1, characterized in that, The tower crane body and its auxiliary supports are connected by a third lateral support and a circumferential clamp. The third lateral support is a truss structure composed of hollow steel pipes or steel sections.

5. A truss-type combined wind turbine hoisting system, characterized in that: The system includes a lifting system support and a self-lifting mechanism; the lifting system support is arranged around the wind turbine truss support structure; The lifting system support and the wind turbine truss support structure are connected by lateral supports; the self-lifting mechanism includes a sling support, slings, a lifting system boom, and a lifting trolley; the lifting system boom is horizontally installed on the upper part of the lifting system support, the sling support is fixed on both sides to the upper part of the lifting system support and is arranged perpendicular to the lifting system boom, and the lifting system boom is fixed to the sling support by slings; The lifting system has a configuration block at one end of the boom and a lifting trolley at the other end.

6. The truss-type combined wind turbine hoisting system according to claim 5, characterized in that: The lifting system support includes a lifting support truss and a jacking mechanism; the lifting system support truss is composed of multiple segments and uses the jacking mechanism to lift its own height; adjacent lifting system support trusses are connected by a fifth transverse support.

7. The truss-type combined wind turbine hoisting system according to claim 5, characterized in that: The lifting system support frame is connected to the wind turbine tower via a fourth lateral support and circumferential clamps.

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