Ultrahigh wind power mixed tower hoisting, attaching, connecting and fixing device and construction method thereof

Abstract

The invention relates to the technical field of wind power mixed tower construction, in particular to an ultrahigh wind power mixed tower hoisting, attaching, connecting and fixing device and a construction method thereof.The device comprises an attaching connecting frame, a connecting and fixing mechanism and a steel wire rope fastening mechanism; a connecting support is arranged on the hoop ring, the attached connecting frame is connected with the tower crane stand column and the connecting support, and the steel wire rope fastening mechanism is installed on the outer side of the hoop ring in a fastened mode. The tower crane is stable in operation, the attached connection fixing device is free of deformation and looseness, the tower barrel structure is free of damage, the cabin and hub hoisting operation of the 200m ultrahigh wind power mixed tower is successfully completed, and compared with an ultra-large crawler crane, the mechanical cost is reduced by 60% or above, the land acquisition coordination difficulty is greatly reduced, and the construction efficiency is improved by 30%.

Description

Technical Field

[0001] This invention relates to the field of wind power hybrid tower construction technology, and in particular to an ultra-high wind power hybrid tower hoisting attachment connection and fixing device and its construction method. Background Technology

[0002] In recent years, my country's wind power industry has achieved rapid development, with wind power installed capacity continuing to climb and wind turbine models gradually upgrading towards larger sizes and higher hub heights. Concrete-steel hybrid tower (hereinafter referred to as hybrid tower) wind turbines, due to their advantages of low engineering cost and strong structural stability in high wind speed areas and high hub height application scenarios, have gradually replaced traditional all-steel tower wind turbines and become one of the mainstream models for onshore wind power projects.

[0003] However, as wind turbine tower heights increase to 180m and above, the working height and lifting load of traditional large crawler cranes and hydraulic cranes can no longer meet the lifting requirements of heavier nacelles and hubs. If ultra-large crawler cranes or hydraulic cranes are used for lifting, on the one hand, extremely high machinery rental and usage costs will be incurred, significantly increasing the project construction cost; on the other hand, ultra-large crane operations require a large amount of land resources, significantly increasing the difficulty of land acquisition and coordination for the project, becoming the core technical pain point for the construction of ultra-high wind turbine hybrid towers above 200m.

[0004] Currently, the construction method of self-elevating tower cranes with attachment connection has been successfully applied in the field of civil super high-rise buildings. However, this attachment connection technology cannot be directly applied to the construction of wind power hybrid towers. Wind power hybrid towers are circular thin-walled structures made of precast concrete "C"-shaped segments spliced ​​together. Each segment is connected to form an "O" ring by grouting. The structural strength and damage resistance are far lower than those of reinforced concrete structures in civil buildings. If embedded parts are installed on the wind power hybrid tower for attachment connection, on-site welding operations are prone to damage to the concrete cylinder wall and grouting vertical joints, which will undermine the overall structural stability of the tower and pose serious construction safety hazards.

[0005] In summary, the existing technology lacks a low-cost, easy-to-construct tower crane attachment and fixing device and supporting construction method that is suitable for the structural characteristics of ultra-high wind turbine hybrid towers. This makes it impossible to achieve efficient and safe hoisting of ultra-high wind turbine hybrid towers above 200m, thus restricting the development process of larger wind turbine models and higher hub heights. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention provides an ultra-high wind power hybrid tower hoisting attachment connection and fixing device and its construction method.

[0007] In a first aspect, the present invention provides an attachment connection and fixing device for hoisting ultra-high wind power hybrid towers, which adopts the following technical solution: it includes an attachment connection frame, a connection and fixing mechanism and a wire rope fastening mechanism. The connection and fixing mechanism includes a clamp ring sleeved and installed on the precast concrete tower. A connecting support is provided on the clamp ring. The attachment connection frame is connected to the tower crane column and the connecting support respectively. The wire rope fastening mechanism is fastened to the outside of the clamp ring.

[0008] Preferably, the clamping ring comprises multiple segments, with flange connecting plates fixed to the ends of the segments, and the flange connecting plates of two adjacent segments are connected by connecting bolts.

[0009] Preferably, a clamp flange reinforcement plate is fixedly connected to the outer side of the end of the link, and the flange connecting plate is fixedly connected to the clamp flange reinforcement plate.

[0010] Preferably, a support reinforcing plate is fixedly connected to the outer wall of the clamp ring, and the connecting support is fixedly connected to the support reinforcing plate.

[0011] Preferably, a soft padding layer is provided between the clamping ring and the precast concrete tower.

[0012] Preferably, the cushioning layer is a rubber pad or a polyurethane pad.

[0013] Preferably, a vertical reinforcing rib is fixed between the clamp flange reinforcing plate and the flange connecting plate.

[0014] Secondly, the present invention provides a construction method for an attachment and fixing device for hoisting ultra-high wind power hybrid towers, comprising the following steps: S1. Fabrication of connection and fixing mechanism: Fabricate multiple links, weld clamp flange reinforcing plates at both ends of the links, weld support reinforcing plates on the outer wall of the links, weld flange connecting plates and connecting supports, and prepare matching connecting bolts, pins, soft pads and wire rope fastening mechanisms. S2. Assembly of connecting and fixing mechanism: According to the tower crane construction plan, attachment points are set at the corresponding elevations of the precast concrete tower. Clamping rings are installed on the corresponding precast concrete tower on the ground. The direction of the connecting support is adjusted so that the connecting support matches the tower crane lifting direction. The connection is spliced ​​into a whole by connecting bolts. A soft pad layer is fully laid between the clamping ring and the tower segment. Multiple links are spliced ​​into a whole structure by connecting bolts. The wire rope fastening mechanism is installed. S3. Precast concrete tower installation: In accordance with the construction drawings and relevant specifications and manuals, use special lifting equipment to lift the pre-assembled "O" ring tower pipe sections in sequence to the design height, and finally lift the steel transition section to ensure coaxiality. S4. Tensioning of prestressed steel strands in the body: Low-relaxation prestressed steel strands are threaded through the precast concrete tower and tensioned according to the design stress. After tensioning, grouting material is used to fill the ducts and the tower is cured to the design strength. S5. Tower crane installation and attachment connection: Construct the tower crane foundation, assemble the tower crane column, frame assembly, slewing mechanism, and tower crane counterweight boom, start the self-elevating jacking, monitor the verticality during the jacking process, and ensure that the verticality deviation of the tower crane column is within the allowable range of the specification. Connect the attachment connection frame and the connection support with the pin at the corresponding elevation, and take anti-loosening measures to complete the attachment reinforcement step by step. S6. Acceptance and handover: The tower crane and equipment shall undergo no-load, rated load, and overload tests, and the test data shall meet the design requirements. After joint acceptance by relevant parties, the equipment shall be handed over for use. S7. Attachment Removal: Attachments are removed promptly during the descent of the tower crane.

[0015] In summary, the present invention has at least one of the following beneficial technical effects: 1. This device uses the tower body as the attachment and connection body, eliminating the need for embedded parts on the tower, effectively avoiding damage to the concrete cylinder wall caused by the construction and welding of embedded parts; 2. This device is a modular prefabricated structure. It is prefabricated in the factory and assembled on site. It is hoisted modularly with the tower pipe sections, resulting in high construction efficiency. The clamp ring adopts a multi-segment splicing structure and achieves rapid assembly and disassembly through high-strength connecting bolts and wire rope fastening mechanism. The device is reusable and can be used as a special hoisting tool for wind power mixed tower hoisting, which greatly reduces the engineering construction cost. 3. This device adopts a clamp-type load-bearing method, which ensures balanced overall force distribution and avoids damage to the tower and vertical joints caused by concentrated force on the welded embedded parts; the clamp flange reinforcement plate and support reinforcement plate at the flange connection plate and the connecting support further enhance the rigidity and load-bearing capacity of the device; the wire rope fastening mechanism improves the fit between the device and the tower, ensuring stability during the hoisting process. 4. The construction method of this invention is based on the self-elevating + attached connection principle of tower cranes for ultra-high civil buildings. It is optimized to suit the structural characteristics of wind power hybrid towers. It is equipped with large flat-top tower cranes to realize the hoisting operation of ultra-high wind power hybrid towers of more than 200m. It replaces the traditional ultra-large crawler cranes and hydraulic cranes, which greatly reduces the cost of machinery rental and use, while reducing the land resources required for crane operation and reducing the difficulty of land acquisition and coordination for projects. 5. The device and construction method of the present invention are adapted to the development needs of wind turbine models with larger size and higher hub height. The construction process is simple, the operation is convenient, the construction efficiency is high, and the safety is strong. It can be widely promoted and applied in onshore ultra-high wind power hybrid tower hoisting projects, and has significant economic and social benefits. 6. During the removal of attachments, the tower crane itself can complete the removal during the descent process, without the need for additional machinery. Attached Figure Description

[0016] Figure 1This is a front view of the hoisting, attachment, connection, and fixing device for ultra-high wind power hybrid towers according to an embodiment of the present invention.

[0017] Figure 2 This is a top view of the hoisting, attachment, connection, and fixing device for ultra-high wind power hybrid towers according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the connection and fixing mechanism according to an embodiment of the present invention. Figure 1 .

[0019] Figure 4 This is a schematic diagram of the connection and fixing mechanism according to an embodiment of the present invention. Figure 2 .

[0020] Figure 5 This is a schematic diagram of the connection and fixing mechanism according to an embodiment of the present invention. Figure 3 .

[0021] Explanation of reference numerals in the attached drawings: 1. Wind turbine foundation; 2. Precast concrete tower; 3. Variable cross-section transition section; 4. Steel transition section; 5. Steel tower section; 6. Tower crane foundation; 7. Tower crane column; 8. Tower crane counterweight boom; 9. Attachment connection frame; 10. Connection and fixing mechanism; 101. Clamp ring; 102. Clamp flange reinforcement plate; 103. Flange connection plate; 104. Connecting bolt; 105. Support reinforcement plate; 106. Connecting support; 107. Facade reinforcement rib; 108. Soft pad layer; 11. Wire rope fastening mechanism. Detailed Implementation

[0022] The following combination Figures 1-5 The present invention will be described in further detail below.

[0023] This invention discloses an attachment and fixing device for hoisting ultra-high wind turbine hybrid towers and its construction method. The wind turbine hybrid tower includes, from bottom to top, a wind turbine foundation 1, a precast concrete tower 2, a variable cross-section transition section 3, a steel transition section 4, and a steel tower section 5; the tower crane includes, from bottom to top, a tower crane foundation 6, a tower crane column 7, and a tower crane counterweight 8.

[0024] The ultra-high wind turbine hybrid tower hoisting attachment and fixing device includes an attachment connection frame 9, a connection and fixing mechanism 10, and a wire rope fastening mechanism 11. The connection and fixing mechanism 10 includes a clamping ring 101 for wrapping around the precast concrete tower 2, which is made of steel plate with a thickness of 10-20mm and a width of 500-800mm to ensure structural strength and load-bearing capacity. In this embodiment, the clamping ring 101 is divided into three segments, and a clamping flange reinforcing plate 102 is welded to the outer side of the end of each segment to enhance the structural strength of the segment splice and avoid stress concentration at the splice to prevent deformation.

[0025] A flange connecting plate 103 is vertically welded to the outside of the clamp flange reinforcing plate 102. The flange connecting plate 103 has a height of 100-120mm and a thickness of 20-25mm, forming a cooperative load-bearing structure with the clamp flange reinforcing plate 102. The flange connecting plates 103 of two adjacent links are connected by connecting bolts 104. There are 5-10 connecting bolts 104, which are high-strength bolts of M24-30 specification, to achieve quick splicing and fixing between links, which is convenient for disassembly and assembly and has high connection strength.

[0026] Each link is also welded with a support reinforcement plate 105 on its outer wall. A connecting support 106 is vertically welded to the outer wall of the support reinforcement plate 105. The three connecting supports 106 are connected to the tower crane column 7 by an attachment connecting frame 9 and a pin. The angle of the attachment connecting frame 9 can be flexibly adjusted according to the relative position of the tower crane and the tower cylinder to adapt to the attachment requirements of different lifting heights, while ensuring the uniform transmission of force.

[0027] A vertical reinforcing rib 107, which provides structural reinforcement, is welded between the clamp flange reinforcing plate 102 and the flange connecting plate 103. A 10mm thick rubber or polyurethane padding layer 108 is also provided between the clamp ring 101 and the precast concrete tower 2. The padding layer 108 can enhance the friction between the clamp ring 101 and the tower tube segments, improve the stability of the connection, and protect the tower tube segments from damage caused by hard contact between the clamp ring 101 and the tower.

[0028] Two wire rope fastening mechanisms 11 are arranged around the outside of the clamp ring 101. The minimum load-bearing capacity of the wire rope fastening mechanism 11 is greater than 2.5t. It is used to further enhance the fit and fastening force between the clamp ring 101 and the precast concrete tower 2, and ensure the stability of the whole device under the action of hoisting load. The two wire rope fastening mechanisms 11 are symmetrically arranged to achieve force balance.

[0029] A construction method for an attachment and fixing device for the hoisting of an ultra-high wind turbine hybrid tower includes the following steps: S1. Fabrication of the connecting and fixing mechanism 10: Cut Q355 steel plates according to the above specifications to fabricate three segments of the clamp ring 101. Weld clamp flange reinforcing plates 102 to both ends of the segments. Weld support reinforcing plates 105 to the outer wall of the segments. Weld flange connecting plates 103 and connecting supports 106. Prepare M30 high-strength connecting bolts 104, Φ50 pins, 10mm thick rubber pads as soft padding layers 108, and a 3.0t steel wire rope fastening mechanism 11. All metal parts are hot-dip galvanized for corrosion protection.

[0030] S2. Assembly of the connecting and fixing mechanism 10: According to the tower crane construction plan, attachment points are set at the corresponding elevations of the precast concrete tower 2. The clamping rings 101 are installed on the corresponding precast concrete tower 2 on the ground. The direction of the connecting support 106 is adjusted so that the connecting support 106 matches the tower crane lifting direction. The high-strength connecting bolts 104 are used to splice them into a whole. Flexible material is fully laid between the clamping ring 101 and the tower segment to ensure that the flexible material has no gaps or wrinkles, so as to achieve flexible contact between the clamping ring 101 and the tower. The three links are spliced ​​into a whole structure by using high-strength connecting bolts 104. The connecting bolts 104 are tightened to the design torque to ensure the connection strength at the splice. Two wire rope fastening mechanisms 11 are installed to complete the fastening operation, so that the clamping ring 101 and the tower segment are tightly fitted without loosening.

[0031] S3. Installation of precast concrete tower section 2: In accordance with the construction drawings and relevant specifications and manuals, use special lifting tools to lift the pre-assembled "O" ring tower pipe sections in sequence to the design height of 200m. Finally, lift the steel transition section 4 to ensure that the coaxiality deviation is ≤5mm.

[0032] S4. Tensioning of prestressed steel strands inside the precast concrete tower: Low-relaxation prestressed steel strands are threaded through the precast concrete tower 2 and tensioned according to the design stress. After tensioning, grouting material is used to fill the ducts and the tower is cured to the design strength.

[0033] S5. Tower crane installation and attachment connection: Construct tower crane foundation 6, assemble tower crane column 7, frame assembly, slewing mechanism, and tower crane counterweight boom 8, start self-elevating jacking, monitor verticality during jacking to ensure that the verticality deviation of tower crane column 7 is within the allowable range of the specification, connect attachment connection frame 9 and connection support 106 at the corresponding elevations with pins, take anti-loosening measures, and complete attachment reinforcement step by step.

[0034] S6. Acceptance and handover: The tower crane and equipment shall undergo no-load, rated load, and overload tests. The test data shall meet the design requirements. After joint acceptance by relevant parties, the crane shall be handed over for use.

[0035] S7. Attachment Removal: Attachments are removed promptly during the descent of the tower crane.

[0036] The ultra-high wind power hybrid tower hoisting attachment connection and fixing device and its construction method according to embodiments of the present invention have the following beneficial effects: 1. This device uses the tower body as the attachment and connection body, eliminating the need for embedded parts on the tower, effectively avoiding damage to the concrete cylinder wall caused by the construction and welding of embedded parts.

[0037] 2. This device is a modular prefabricated structure. It is prefabricated in the factory and assembled on site. It is hoisted modularly with the tower pipe sections, resulting in high construction efficiency. The clamp ring 101 adopts a multi-segment (three-segment) splicing structure. It can be quickly assembled and disassembled through high-strength connecting bolts 104 and wire rope fastening mechanism 11. The device can be reused and can be used as a special hoisting tool for wind power mixed tower hoisting, which greatly reduces the engineering construction cost.

[0038] 3. This device adopts a clamp-type load-bearing method, which ensures balanced overall force distribution and avoids damage to the tower and vertical joints caused by concentrated force on the welded embedded parts. The clamp flange reinforcement plate 102 and the support reinforcement plate 105 at the flange connection plate 103 and the connecting support 106 further enhance the rigidity and load-bearing capacity of the device. The wire rope fastening mechanism 11 improves the fit between the device and the tower, ensuring stability during the hoisting process.

[0039] 4. The construction method of this invention is based on the self-elevating + attached connection principle of tower cranes for ultra-high civil buildings. It is optimized to suit the structural characteristics of wind power hybrid towers. It is equipped with large flat-top tower cranes to realize the hoisting operation of ultra-high wind power hybrid towers of more than 200m. It replaces the traditional ultra-large crawler cranes and hydraulic cranes, which greatly reduces the cost of machinery rental and use, while reducing the land resources required for crane operation and reducing the difficulty of land acquisition and coordination for projects.

[0040] 5. The device and construction method of the present invention are adapted to the development needs of larger wind turbine models and higher hub heights. The construction process is simple, convenient to operate, efficient, and safe. It can be widely promoted and applied in onshore ultra-high wind power hybrid tower hoisting projects, and has significant economic and social benefits.

[0041] 6. During the removal of attachments, the tower crane itself can complete the removal during the descent process, without the need for additional machinery.

[0042] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A hoisting attachment and fixing device for ultra-high wind power hybrid towers, characterized in that: It includes an attachment frame (9), a connection fixing mechanism (10), and a wire rope fastening mechanism (11). The connection fixing mechanism (10) includes a clamp ring (101) sleeved and installed on the precast concrete tower (2). A connection support (106) is provided on the clamp ring (101). The attachment frame (9) is connected to the tower crane column (7) and the connection support (106) respectively. The wire rope fastening mechanism (11) is fastened to the outside of the clamp ring (101).

2. The ultra-high wind power hybrid tower hoisting attachment and fixing device according to claim 1, characterized in that: The clamping ring (101) includes multiple segments, with flange connecting plates (103) fixed to the ends of the segments. The flange connecting plates (103) of two adjacent segments are connected by connecting bolts (104).

3. The ultra-high wind power hybrid tower hoisting attachment and fixing device according to claim 2, characterized in that: A clamp flange reinforcing plate (102) is fixedly connected to the outer side of the end of the link, and the flange connecting plate (103) is fixedly connected to the clamp flange reinforcing plate (102).

4. The ultra-high wind power hybrid tower hoisting attachment connection and fixing device according to claim 1, characterized in that: The outer wall of the clamp ring (101) is fixedly connected to the support reinforcing plate (105), and the connecting support (106) is fixedly connected to the support reinforcing plate (105).

5. The ultra-high wind power hybrid tower hoisting attachment connection and fixing device according to claim 1, characterized in that: A soft padding layer (108) is provided between the clamping ring (101) and the precast concrete tower (2).

6. The ultra-high wind power hybrid tower hoisting attachment connection and fixing device according to claim 5, characterized in that: The cushioning layer (108) is a rubber pad or a polyurethane pad.

7. The ultra-high wind power hybrid tower hoisting attachment connection and fixing device according to claim 3, characterized in that: A vertical reinforcing rib (107) is fixed between the clamp flange reinforcing plate (102) and the flange connecting plate (103).

8. A construction method for the hoisting attachment and fixing device of an ultra-high wind power hybrid tower as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Making the connecting and fixing mechanism (10): Make multiple links, weld the clamp flange reinforcing plate (102) at both ends of the links, weld the support reinforcing plate (105) on the outer wall of the links, weld the flange connecting plate (103) and the connecting support (106), and prepare the connecting bolts (104), pins, soft pads (108) and wire rope fastening mechanism (11). S2. Assembly of the connecting and fixing mechanism (10): According to the tower crane construction plan, attachment points are set at the corresponding elevations of the precast concrete tower (2), and clamp rings (101) are installed on the corresponding precast concrete tower (2) on the ground. The direction of the connecting support (106) is adjusted so that the connecting support (106) matches the tower crane lifting direction. The connecting bolts (104) are used to splice them into a whole. A soft pad layer (108) is fully laid between the clamp ring (101) and the tower tube segment. Multiple links are spliced ​​into a whole structure by connecting bolts (104). The wire rope fastening mechanism (11) is installed. S3. Installation of precast concrete tower (2): According to the construction drawings and relevant specifications and manuals, use special lifting tools to lift the pre-assembled "O" ring tower pipe sections in sequence, lift them to the design height, and finally lift the steel transition section (4) to ensure coaxiality. S4. Tensioning of prestressed steel strands in the body: Low-relaxation prestressed steel strands are threaded through the precast concrete tower (2), and tensioned according to the design stress. After tensioning, grouting material is used to grout the ducts and cure to the design strength. S5. Tower crane installation and attachment connection: Construct the tower crane foundation (6), assemble the tower crane column (7), frame assembly, slewing mechanism, and tower crane balance arm (8), start the self-elevating jacking, monitor the verticality during the jacking process, and ensure that the verticality deviation of the tower crane column (7) is within the allowable range of the specification. Connect the attachment connection frame (9) and the connection support (106) at the corresponding elevations with pins, and do a good job of anti-loosening treatment. Complete the attachment reinforcement step by step. S6. Acceptance and handover: The tower crane and equipment shall undergo no-load, rated load, and overload tests, and the test data shall meet the design requirements. After joint acceptance by relevant parties, the equipment shall be handed over for use. S7. Attachment Removal: Attachments are removed promptly during the descent of the tower crane.

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