A kind of sectional steel-concrete tower drum, concrete tower drum and wind power device
By using a dry connection structure and precast concrete segment design, the problem of difficult assembly of traditional concrete tower sections in low-temperature environments has been solved, enabling rapid and reliable tower connection in high-altitude and cold regions, and improving construction efficiency and seismic performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING UNIV
- Filing Date
- 2025-08-20
- Publication Date
- 2026-06-23
AI Technical Summary
Traditional concrete tower sections have insufficient strength at wet joints in low-temperature environments, leading to assembly difficulties. Furthermore, frequent earthquakes in high-altitude and cold regions cannot effectively address the issues of long construction periods and poor seismic performance in these regions.
The dry connection structure replaces the traditional wet connection with structural adhesive. Through the design of precast concrete tube segments and edge sealing steel plates, combined with shear connectors and bolt connections, a reliable dry connection is achieved, simplifying the construction process and enhancing the tower's seismic performance and energy dissipation capacity.
It significantly improves connection reliability and construction convenience, simplifies construction procedures, shortens the construction period, enhances the structural strength and damage resistance of the tower, and meets the needs of wind energy development in high-altitude and cold regions.
Smart Images
Figure CN224396614U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of onshore wind power generation technology, specifically to a segmented steel-concrete tower, a concrete tower, and a wind power device. Background Technology
[0002] Wind power is a renewable and clean energy source. my country's high-altitude and cold regions have high wind speeds and abundant wind energy resources, with a exploitable capacity exceeding 1 billion kilowatts. Hybrid support structures offer superior performance and low cost, meeting the needs of wind energy development in these regions. The segmented hybrid support structure is a common support structure for onshore wind turbines, primarily composed of concrete and steel tower sections. Traditionally, concrete tower sections are leveled and connected using structural adhesive. However, at temperatures below -10°C, the wet joints of the concrete segments lack sufficient strength, preventing assembly. Low temperatures and freeze-thaw cycles further degrade the performance of these wet joints, leading to defects and ultimately tower collapse. Most high-altitude and cold regions experience frequent earthquakes, placing high demands on the structure's seismic resistance and energy dissipation capacity. Therefore, adopting a connection structure capable of construction in low-temperature environments, simplifying construction procedures, saving time, improving assembly quality, adapting to year-round temperatures in high-altitude and cold regions, and possessing good seismic resistance and energy dissipation capacity are crucial for developing and utilizing the abundant wind energy resources in these areas. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a segmented steel-concrete tower, concrete tower and wind power device. When assembling the segmented steel-concrete tower, it can effectively save the construction period, improve the assembly quality, simplify the construction process, enhance the energy consumption capacity of the tower, and reduce the manual input of structural adhesive application in traditional construction.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a segmented steel-concrete tower, comprising:
[0005] Multiple precast concrete segment structures, each precast concrete segment structure having pre-drilled connection and installation holes, are stacked sequentially from bottom to top along the axial direction to form a segmented, cylindrical reinforced concrete tower; and
[0006] A dry connection structure is used to connect adjacent precast concrete segment structures through the connection mounting holes.
[0007] Furthermore, the precast concrete segment structure includes a precast concrete segment body and an edge sealing steel plate covering the side of the precast concrete segment body. Both the edge sealing steel plate and the precast concrete segment body have pre-drilled connection and installation holes. The dry connection structure connects and fixes the precast concrete segment body and the edge sealing steel plate of two adjacent precast concrete segment structures through the connection and installation holes.
[0008] Furthermore, the two adjacent precast concrete segments are staggered along the axial direction.
[0009] Furthermore, the precast concrete segment structure also includes a shear connector, one end of which is fixedly connected to the edge sealing steel plate, and the other end is embedded in the precast concrete segment.
[0010] Furthermore, the shear-resistant connector includes a stud, which is welded to the edge sealing steel plate. One end of the stud away from the edge sealing steel plate is embedded in the precast concrete segment, and the end of the stud forms a T-shaped pull-out anchor.
[0011] Furthermore, the precast concrete segment body includes a reinforcing cage and concrete that encloses the reinforcing cage and solidifies.
[0012] Furthermore, the precast concrete tube segment body is an arc-shaped plate structure.
[0013] Furthermore, the dry connection structure includes a double-ended bolt rod and two locking nuts. The connection mounting holes include a first bolt hole and a second bolt hole. The precast concrete tube segment has a first bolt hole that penetrates two adjacent sidewalls. The edge sealing steel plate has a second bolt hole along its thickness direction. The second bolt hole is connected to the first bolt hole or second bolt hole on the adjacent precast concrete tube segment structure. The double-ended bolt rod penetrates the corresponding second bolt hole on two adjacent edge sealing steel plates, and its two ends extend out of the second bolt hole. The two locking nuts are respectively screwed onto the exposed portions at both ends of the double-ended bolt rod.
[0014] A concrete tower includes the aforementioned segmented reinforced concrete tower, and further includes a transition section, a steel tower section, and prestressing tendons. The segmented reinforced concrete tower is installed on a concrete foundation. The transition section is located at the top of the segmented reinforced concrete tower. The steel tower section is located at the top of the transition section and is used to install wind turbine components. The lower end of the prestressing tendons is connected to the concrete foundation, and the top end of the prestressing tendons extends vertically through the segmented reinforced concrete tower and connects to the bottom end of the transition section.
[0015] A wind power device includes the aforementioned concrete tower and a wind turbine assembly mounted on the steel tower.
[0016] The beneficial effects of this utility model are:
[0017] The aforementioned segmented steel-concrete tower, concrete tower, and wind power equipment have the following beneficial effects:
[0018] 1. Connection reliability and ease of construction
[0019] By replacing the traditional wet connection with structural adhesive through a dry connection structure, the connection reliability is significantly improved, and problems such as adhesive aging and cracking are avoided. It is especially suitable for tower structures subjected to dynamic wind loads.
[0020] On-site installation only requires hoisting and fastening, eliminating complex processes such as applying and curing structural adhesive, simplifying the construction process, reducing reliance on workers' technical skills, and shortening the construction period.
[0021] 2. Structural strength and damage resistance
[0022] Dry connection provides a continuous and stable axial clamping force through pre-tightening force, ensuring tight bonding between layers and enhancing overall bending stiffness.
[0023] 3. Industrialized production and quality controllability
[0024] The segmented design enables standardized prefabrication and mass production in the factory, avoiding quality fluctuations during on-site pouring.
[0025] Balancing transportation convenience with assembly precision, this method solves the transportation challenges of large-diameter towers. Attached Figure Description
[0026] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.
[0027] Figure 1 This is a schematic diagram of the connection of segmented steel-concrete tower sections in an embodiment of the present invention;
[0028] Figure 2 for Figure 1 A schematic diagram of the reinforcing cage in a segmented steel-concrete tower.
[0029] Figure 3 for Figure 1 The diagram shows a dry connection structure in a segmented steel-concrete tower connecting two adjacent precast concrete segments in the circumferential direction.
[0030] Figure 4 for Figure 1 The diagram shows a dry connection structure in a segmented steel-concrete tower connecting two adjacent precast concrete segments in the circumferential direction.
[0031] Figure 5 A schematic diagram of a wind power device provided in an embodiment of this utility model;
[0032] Figure 6 for Figure 5 A partial sectional view of the provided wind power unit;
[0033] Figure label:
[0034] 100. Segmented steel-concrete tower; 110. Precast concrete segment structure; 111. Precast concrete segment body; 1111. Reinforcing cage; 112. Edge sealing steel plate; 113. Shear connector; 120. Dry connection structure; 121. Double-ended bolt rod; 122. Locking nut; 123. First bolt hole; 124. Second bolt hole; 125. Washer; 200. Transition section; 300. Steel tower; 400. Prestressed tendon; 500. Wind turbine unit. Detailed Implementation
[0035] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0036] Please see Figures 1 to 4 This utility model provides a segmented steel-concrete tower 100, which includes multiple precast concrete tube segments 110 and a dry connection structure 120.
[0037] Specifically, the precast concrete segment structure has pre-drilled connection and installation holes, and multiple precast concrete segment structures are stacked sequentially from bottom to top along the axial direction to form a cylindrical segmented reinforced concrete tower. A dry connection structure is used to connect adjacent precast concrete segment structures through the connection and installation holes.
[0038] During use, the concrete segments are first poured, ensuring dimensional accuracy and concrete strength. Corresponding connection and installation holes must also be pre-drilled. After the precast concrete segment structure 110 solidifies, it is transported to the installation site and hoisted through the connection and installation holes, allowing the segments to be stacked layer by layer along the axial direction. Then, the dry connection structure 120 locks adjacent precast concrete segment structures 110 together.
[0039] The aforementioned segmented steel-concrete tower 100 utilizes a dry connection structure instead of the traditional wet structural adhesive connection, significantly improving connection reliability and avoiding problems such as adhesive aging and cracking. This is particularly suitable for tower structures subjected to dynamic wind loads. On-site construction only requires hoisting and fastening, eliminating complex processes such as applying and curing structural adhesive, simplifying the construction process, reducing reliance on worker skills, and shortening the construction period.
[0040] In addition, the segmented design enables standardized prefabrication and mass production in the factory, avoiding quality fluctuations during on-site casting; it also balances transportation convenience and assembly precision, solving the transportation challenges of large-diameter towers.
[0041] Specifically, the precast concrete segment structure 110 includes precast concrete segment bodies 111 and edge-sealing steel plates 112 covering the sides of the precast concrete segment bodies 111. During construction, the edge-sealing steel plates 112 are cast integrally with the precast concrete segment bodies 111. The dry connection structure 120 is used to connect and fix two adjacent precast concrete segment bodies 111 and edge-sealing steel plates 112 together through mounting holes to form a cylindrical segmented reinforced concrete tower 100.
[0042] In use, the concrete segment body is first poured, ensuring dimensional accuracy and concrete strength. During pouring, the edge sealing steel plate 112 is bonded to the concrete to form a reinforced edge. At the same time, corresponding connection and installation holes need to be reserved. After the precast concrete segment structure 110 has solidified, it is transported to the installation site and hoisted through the connection and installation holes, allowing the segment structure to be stacked layer by layer along the axial direction. Then, the precast concrete segment body 111 and edge sealing steel plate 112 of two adjacent precast concrete segment structures 110 are locked together by the dry connection structure 120.
[0043] By using the above-mentioned multiple precast concrete segment structures 110, and through the edge protection of the edge sealing steel plate 112 and the dry connection structure 120 penetrating through the edge sealing steel plate 112 during connection, the edge compressive strength can be enhanced, lifting cracking can be avoided, and the problem of thin-walled concrete being easily damaged can be solved.
[0044] In practical implementation, adjacent precast concrete segment structures 110 can be arranged with axial offset, meaning the joints of the upper segment are offset from the joints of the lower segment by a certain angle. This staggered arrangement creates an alternating distribution of joints, avoiding vertical through joints. When fastened using the dry connection structure 120, the staggered joints form an interlocking effect. This eliminates continuous weak surfaces, enhances the tower's shear resistance, disperses stress concentration, and thus significantly improves the overall seismic performance.
[0045] In a preferred embodiment, the segmented reinforced concrete tower 100 further includes a shear connector 113, one end of which is fixedly connected to the edge sealing steel plate 112, and the other end is embedded in the precast concrete segment 111. In a specific implementation, the shear connector 113 may include a stud, which is welded to the edge sealing steel plate 112. The end of the stud away from the edge sealing steel plate 112 is embedded in the precast concrete segment 111, and the end of the stud forms a pull-out anchor. The pull-out anchor may employ an anchoring structure where the end of the stud is bent into a T-shape.
[0046] In this way, a T-shaped anchoring structure is wrapped around the concrete during pouring to form a mechanical interlock. The lateral shear force is transferred to the interior of the concrete through the edge sealing steel plate 112 via studs, which can enhance the pull-out resistance of the concrete and the steel plate and suppress interlayer displacement. At the same time, durability is ensured by welding to the pre-embedded double insurance.
[0047] In this embodiment, the precast concrete segment 111 includes a reinforcing cage 1111 and concrete that encloses and solidifies the reinforcing cage 1111. The reinforcing cage 1111 can be formed by welding ring stirrups and longitudinal reinforcing bars into a skeleton. The concrete encloses the reinforcing cage 1111, is vibrated to compact it, and then cured. The reinforcing cage 1111 can improve crack resistance and load-bearing capacity. By pre-casting the concrete in a standardized manner in the factory, the density of the concrete is ensured, avoiding on-site quality fluctuations.
[0048] Furthermore, in practical implementation, the precast concrete tube segments 111 can be set as an arc-shaped plate structure, with the arc length corresponding to 1 / 4 to 1 / 6 of the tower's circumference (taking 8 segments assembled into a complete circle as an example), and the curvature of the inner arc surface should be consistent with the tower's designed curvature. The arc-shaped structure conforms to the tower's stress pattern, and the number of segments can optimize the balance between transportation efficiency and assembly accuracy.
[0049] In this embodiment, the dry connection structure 120 includes a double-ended bolt rod 121 and two locking nuts 122. The connection mounting holes include a first bolt hole 123 and a second bolt hole 124. The precast concrete tube segment has a first bolt hole 123 that penetrates two adjacent side walls, and the edge sealing steel plate 112 has a second bolt hole 124 that extends along its thickness direction. The second bolt hole 124 is correspondingly connected to the first bolt hole 123 or the second bolt hole 124 on the adjacent precast concrete tube segment structure 110. The double-ended bolt rod 121 penetrates the corresponding second bolt hole 124 on two adjacent edge sealing steel plates 112, and its two ends extend out of the second bolt hole 124. The two locking nuts 122 are respectively screwed onto the exposed portions at both ends of the double-ended bolt rod 121.
[0050] During assembly, after multiple precast concrete segments have solidified and cooled, they are transported to the construction site and installed using a dry connection structure 120. This significantly improves connection reliability and avoids the need for on-site application of structural adhesive and waiting for curing, thus shortening the critical path time. Furthermore, this detachable design facilitates installation, maintenance, and replacement; the bolted connections provide reliable tensile strength to withstand dynamic wind loads on the tower.
[0051] In practical implementation, a washer 125 can be placed between the precast concrete segment 111 and the locking nut 122 to improve the fastening effect.
[0052] Please see Figures 5 to 6This utility model also provides a concrete tower, which includes the above-mentioned segmented steel-concrete tower 100, transition section 200, steel tower 300 and prestressed tendons 400. The segmented steel-concrete tower 100 is installed on a concrete foundation. The transition section 200 is located on the top of the segmented steel-concrete tower 100. The steel tower 300 is located on the top of the transition section 200 and is used to install wind turbine components. The lower end of the prestressed tendon 400 is connected to the concrete foundation, and the top end of the prestressed tendon 400 extends vertically through the segmented steel-concrete tower 100 and connects to the bottom end of the transition section 200.
[0053] During construction, the segmented steel-concrete tower 100 is first anchored to the concrete foundation; then the lower end of the prestressed tendon 400 is anchored to the foundation, and the top end passes through the tower body and is anchored to the bottom of the transition section 200; then the transition section 200 is installed on the top of the tower body, and the steel tower 300 is fixed above the transition section 200.
[0054] In addition, this utility model also provides a wind power device, which includes the above-mentioned concrete tower and a wind turbine assembly 500, which is mounted on the steel tower 300.
[0055] Wind power systems employing this segmented steel-concrete tower and concrete tower design have the following advantages:
[0056] 1. Revolutionizing traditional connection methods
[0057] The use of dry bolt connections instead of wet structural adhesive connections, with the rigid connection between the double-headed bolt rod 121 and the locking nut 122, significantly improves connection reliability; at the same time, it avoids the process of applying structural adhesive and waiting for curing on the construction site, shortening the critical path construction period.
[0058] 2. Segmented integrated prefabricated structure
[0059] The use of 112 edge-sealing steel plates and concrete segments for casting enhances edge compressive strength and solves the problem of thin-walled concrete being easily damaged. The segmented, optimized design overcomes the limitations of transporting large-size towers and is compatible with standard freight vehicles.
[0060] 3. Breakthroughs in construction efficiency and quality
[0061] The structure employs hoisting and bolt-fastening, eliminating the need for large-scale pouring equipment, thus reducing the number of construction workers. It also offers exceptional adaptability to complex terrains such as mountainous and offshore areas. Furthermore, the seamless connection of the entire structure facilitates localized replacement and maintenance.
[0062] 4. Significant improvement in mechanical properties and durability.
[0063] Bolt preload provides continuous clamping force, suppressing interlayer displacement, improving bending stiffness, and offsetting the tensile stress during wind turbine operation after tensioning, significantly improving fatigue life. The staggered joint arrangement combined with interlocking effect eliminates weak vertical joints, thus improving shear resistance. The T-shaped anchoring structure's mechanical interlocking enhances interlayer pull-out resistance.
[0064] 5. The design of the 200mm transition section can solve the abrupt change in stiffness between the concrete and steel tower sections and reduce the peak stress concentration.
[0065] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.
Claims
1. A segmented steel-concrete tower, characterized in that, include: Multiple precast concrete tube segments, each precast concrete tube segment having pre-drilled connection and installation holes, are stacked sequentially from bottom to top along the axial direction to form a cylindrical segmented steel-concrete tower. and A dry connection structure is used to connect adjacent precast concrete segment structures through the connection mounting holes. The precast concrete segment structure includes a precast concrete segment body and an edge sealing steel plate covering the side of the precast concrete segment body. Both the edge sealing steel plate and the precast concrete segment body have pre-reserved connection and installation holes. The dry connection structure connects and fixes the precast concrete segment body and the edge sealing steel plate of two adjacent precast concrete segment structures through the connection and installation holes. The precast concrete segment structure also includes a shear connector, one end of which is fixedly connected to the edge sealing steel plate, and the other end is embedded in the precast concrete segment. The shear-resistant connector includes a stud, which is welded to the edge sealing steel plate. One end of the stud away from the edge sealing steel plate is embedded in the precast concrete segment, and the end of the stud forms a T-shaped pull-out anchor.
2. The segmented reinforced concrete tower according to claim 1, characterized in that, The two adjacent precast concrete segments are staggered along the axial direction.
3. The segmented reinforced concrete tower according to claim 1, characterized in that, The precast concrete segment includes a reinforcing cage and concrete that encloses the reinforcing cage and solidifies.
4. The segmented reinforced concrete tower according to claim 1, characterized in that, The precast concrete tube segment has an arc-shaped plate structure.
5. The segmented reinforced concrete tower according to claim 1, characterized in that, The dry connection structure includes a double-ended bolt rod and two locking nuts. The connection mounting holes include a first bolt hole and a second bolt hole. The precast concrete tube segment has a first bolt hole that penetrates two adjacent sidewalls. The edge sealing steel plate has a second bolt hole along its thickness direction. The second bolt hole is connected to the first bolt hole or second bolt hole on the adjacent precast concrete tube segment structure. The double-ended bolt rod penetrates the corresponding second bolt hole on two adjacent edge sealing steel plates, and its two ends extend out of the second bolt hole. The two locking nuts are respectively screwed onto the exposed portions at both ends of the double-ended bolt rod.
6. A concrete tower, characterized in that, The structure includes a segmented reinforced concrete tower as described in any one of claims 1-5, and further includes a transition section, a steel tower, and prestressing tendons. The segmented reinforced concrete tower is installed on a concrete foundation. The transition section is located at the top of the segmented reinforced concrete tower. The steel tower is located at the top of the transition section and is used to install wind turbine components. The lower end of the prestressing tendons is connected to the concrete foundation, and the top end of the prestressing tendons extends vertically through the segmented reinforced concrete tower and connects to the bottom end of the transition section.
7. A wind power device, characterized in that, The system includes the concrete tower as described in claim 6, and also includes a wind turbine assembly mounted on the steel tower.