A fully prefabricated wind turbine tower bolt connection structure

Abstract

This utility model discloses a fully prefabricated wind turbine tower bolt connection structure. The structure includes a concrete tower, which is composed of multiple interconnected concrete tower segments. The tops and bottoms of adjacent concrete tower segments are fixedly connected together by multiple vertical connectors. Each concrete tower segment includes a first and a second concrete tower plate with two semi-circular structures. The openings of the first and second concrete tower plates face each other, and their adjacent ends are fixedly connected together by multiple horizontal connectors. This fully prefabricated wind turbine tower presents an elegant yet robust cylindrical structure. All components are tightly connected by precisely designed bolts, forming a stable and efficient support system. This structural design not only improves the aesthetics of the wind turbine tower but also enhances its mechanical performance, construction efficiency, and environmental performance.

Description

Technical Field

[0001] This utility model relates to a fully assembled wind turbine tower bolt connection structure, belonging to the technical field of wind power generation equipment. Background Technology

[0002] With the accelerated global energy transition, wind energy, as an important component of renewable energy, is experiencing unprecedented growth in its development and utilization. As a key supporting structure for wind turbine generators, the performance of wind turbine towers directly affects the efficiency, safety, and long-term operation and maintenance costs of the entire wind power system.

[0003] Traditional wind turbine towers mostly employ on-site welding or cast-in-place casting for connection. While this method meets strength and stability requirements to some extent, it has several limitations. First, the welding workload is large, and the construction period is long, making it difficult to adapt to the needs of rapid deployment. Second, welding quality is greatly affected by human factors, and cracks and deformations are prone to occur at the welds, posing a potential threat to the overall performance of the tower. Furthermore, the emissions of pollutants such as fumes and sparks during the welding process do not align with current green and environmentally friendly manufacturing principles.

[0004] In recent years, fully prefabricated wind turbine towers have gradually become a new trend in the industry due to their modular and standardized design concepts, as well as their advantages such as convenient construction and controllable quality. However, existing fully prefabricated towers still face bottlenecks in bolt connection technology. On the one hand, the selection and design of bolt connectors often lack specificity, resulting in insufficient connection strength and difficulty in withstanding wind loads and fatigue loads under extreme weather conditions. On the other hand, the tightness of the connections is difficult to control precisely, and loosening during long-term operation can easily lead to structural failure, affecting the safe operation and service life of the wind turbine tower. Utility Model Content

[0005] The purpose of this invention is to provide a fully prefabricated bolted connection structure for wind turbine towers. This aims to achieve more efficient, reliable, and environmentally friendly wind turbine tower construction.

[0006] The technical solution of this utility model is: a fully assembled wind power tower bolt connection structure, including a concrete tower, which is composed of multiple concrete tower segments connected to each other. The top and bottom of two adjacent concrete tower segments are fixedly connected together by multiple vertical connectors. Each concrete tower segment includes a first concrete tower piece and a second concrete tower piece with two semi-circular structures. The openings of the first concrete tower piece and the second concrete tower piece are arranged facing each other, and the adjacent ends of the two are fixedly connected together by multiple horizontal connectors.

[0007] The vertical connector includes a first vertical embedded plate embedded in the top of the concrete tower section and a second vertical embedded plate embedded in the bottom of the concrete tower section. The exposed parts of the first vertical embedded plate and the second vertical embedded plate are provided with through holes. The outer side of the first vertical embedded plate of the lower concrete tower section and the second vertical embedded plate of the upper concrete tower section are provided with vertical connecting plates. The vertical bolt passes through the through holes of the vertical connecting plate, the first vertical embedded plate, and the second vertical embedded plate and is locked and fixed with vertical adjustable double nuts.

[0008] The transverse connector includes a first transverse embedded plate pre-embedded at both ends of the first concrete tower section and a second transverse embedded plate pre-embedded at both ends of the second concrete tower section. The exposed portions of the first transverse embedded plate and the second transverse embedded plate are provided with through holes. A transverse connecting plate is provided on the outer side of the exposed portions of the first transverse embedded plate and the second transverse embedded plate. After the transverse bolt passes through the through holes of the transverse connecting plate, the first transverse embedded plate, and the second transverse embedded plate, it is locked and fixed with a transversely adjustable double nut.

[0009] In the aforementioned fully prefabricated wind turbine tower bolt connection structure, the vertical connecting plate includes a first vertical connecting plate and a second vertical connecting plate, with the two vertical connecting plates respectively disposed on both sides of the first vertical embedded plate and the second vertical embedded plate.

[0010] In the aforementioned fully prefabricated wind turbine tower bolt connection structure, the vertical first embedded plate and the vertical second embedded plate are also connected to multiple vertical studs on the plate body embedded in the concrete tower section.

[0011] In the aforementioned fully prefabricated wind turbine tower bolt connection structure, the transverse connecting plate includes a first transverse connecting plate and a second transverse connecting plate, with the two transverse connecting plates respectively disposed on both sides of the first transverse embedded plate and the second transverse embedded plate.

[0012] In the aforementioned fully prefabricated wind turbine tower bolt connection structure, the first and second transverse embedded plates are embedded in the first and second concrete tower sections, and multiple transverse studs are also connected to the plate bodies.

[0013] In the aforementioned fully prefabricated wind turbine tower bolt connection structure, when the top and bottom of two adjacent concrete tower sections are fixedly connected together by multiple vertical connectors, a transition support plate is provided between the first vertical embedded plate and the second vertical embedded plate above it.

[0014] In the aforementioned fully prefabricated wind turbine tower bolt connection structure, the top, bottom, and side ends of the first and second concrete tower sections are provided with protrusions. The protrusions are located outside the vertical and horizontal connectors. After multiple concrete tower sections are connected to each other, adjacent protrusions are connected and fixed together by protective plates.

[0015] In the aforementioned fully prefabricated wind turbine tower bolt connection structure, the width of the circumferentially arranged protective plate is equal to the gap between two adjacent concrete tower sections, the width of the vertically arranged protective plate is equal to the gap between the first concrete tower section and the second concrete tower section, and the end of the circumferentially arranged protective plate contacts the side wall of the vertically arranged protective plate.

[0016] In the aforementioned fully assembled wind turbine tower bolt connection structure, the inner surface of the protective plate is bonded and fixed to the outer surface of the protrusion.

[0017] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model has vertical and horizontal connecting parts. The vertical connecting parts can effectively connect the concrete tower sections, while the horizontal connecting parts can effectively connect two concrete tower sections together to form a complete concrete tower section. The horizontal and vertical connecting parts are fixedly connected to adjacent embedded plates by connecting plates. This structure has good anti-torque effect, and the studs at the ends of the embedded plates can improve the connection strength between the embedded plates and the concrete tower sections.

[0018] In summary, the utility model employs vertical and horizontal connectors with the above-described structure, which improves the load-bearing capacity and fatigue resistance of the connectors, ensuring a stable connection even under extreme working conditions.

[0019] Advanced pre-tightening force and torque control technology is used during the connection process to ensure that each bolt connection reaches the ideal tightness, effectively preventing loosening and extending the service life of the tower.

[0020] The modular structural design and standardized design of all tower components facilitate rapid assembly and disassembly, greatly shortening the construction cycle and reducing construction difficulty and cost.

[0021] The traditional welding process was abandoned in favor of bolted connections, which reduced pollutant emissions during construction and met the requirements of green construction.

[0022] Thanks to the aforementioned technical solution, the fully assembled wind turbine tower of this invention presents an elegant yet robust cylindrical structure. All components are tightly connected via precisely designed bolts, forming a stable and efficient support system. This structural design not only enhances the aesthetics of the wind turbine tower but also improves its mechanical performance, construction efficiency, and environmental performance. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the complete assembly of this utility model;

[0024] Figure 2This is a three-dimensional schematic diagram of the assembly and connection of the upper and lower tower sections of this utility model;

[0025] Figure 3 This is a front view schematic diagram of the assembly and connection of the upper and lower tower sections of this utility model;

[0026] Figure 4 This is a schematic diagram of the assembly and connection of the upper and lower tower sections of this utility model.

[0027] Figure 5 This is a plan view of the transverse connecting component for the tower sections according to this utility model;

[0028] Figure 6 This is an exploded view of the transverse connecting component of the tower section according to this utility model;

[0029] Figure 7 This is a front view schematic diagram of the vertical connecting component for the tower sections of this utility model;

[0030] Figure 8 This is an exploded view of the vertical connecting component of the tower section according to this utility model;

[0031] Figure 9 A schematic diagram of the structure of this utility model when a protrusion is provided;

[0032] Figure 10 This is a structural diagram of the present invention when a protective plate is provided;

[0033] Figure 11 for Figure 10 A partial top-view structural diagram.

[0034] Explanation of reference numerals in the attached drawings: 1-Concrete tower, 2-First concrete tower section, 3-Second concrete tower section, 4-First horizontal embedded plate, 5-Second horizontal embedded plate, 6-First horizontal connecting plate, 7-Second horizontal connecting plate, 8-Horizontal stud, 9-Horizontal bolt, 10-Adjustable double nut, 11-First vertical embedded plate, 12-Second vertical embedded plate, 13-First vertical connecting plate, 14-Second vertical connecting plate, 15-Vertical stud, 16-Vertical bolt, 17-Adjustable double nut, 18-Vertical connector, 19-Horizontal connector, 20-Transition support plate, 21-Protrusion, 22-Protective plate. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0036] An embodiment of this utility model: A fully prefabricated wind turbine tower bolt connection structure includes a concrete tower 1, which is formed by connecting multiple concrete tower segments vertically. The top and bottom of two adjacent concrete tower segments are fixedly connected together by multiple vertical connectors 18 evenly distributed around their circumference. Each concrete tower segment includes a first concrete tower piece 2 and a second concrete tower piece 3 with two semi-circular structures. The openings of the first concrete tower piece 2 and the second concrete tower piece 3 are arranged facing each other, and their adjacent ends are fixedly connected together by multiple transverse connectors 19 evenly distributed along the height direction.

[0037] The first concrete tower section 2 and the second concrete tower section 3 can be quickly connected together by the horizontal connector 19 to form a concrete tower segment, and several concrete tower segments can be quickly fixed together by the vertical connector 18 to form a concrete tower 1.

[0038] The vertical connector 18 includes a first vertically embedded plate 11 vertically pre-embedded at the top of the concrete tower section, i.e., pre-embedded at the top of the first concrete tower segment 2 and the second concrete tower segment 3, and a second vertically embedded plate 12 vertically pre-embedded at the bottom of the concrete tower section, i.e., pre-embedded at the bottom of the first concrete tower segment 2 and the second concrete tower segment 3. Both the first vertically embedded plate 11 and the second vertically embedded plate 12 have multiple through holes on their exposed portions. When two adjacent concrete tower segments are connected together, the lower concrete tower segment's first vertically embedded plate... A vertical connecting plate is provided on the outer side of the vertical second embedded plate 12 of the plate 11 and the concrete tower section above it. A portion of the vertical bolts 16 pass through the holes on the vertical connecting plate and the vertical first embedded plate 11 and are then locked and fixed with vertical adjustable double nuts 17. A portion of the vertical bolts 16 pass through the holes on the vertical connecting plate and the vertical second embedded plate 12 and are then locked and fixed with vertical adjustable double nuts 17. The vertical first embedded plate 11 and the vertical second embedded plate 12 are connected together through the vertical connecting plate, and the concrete tower section above is supported by the vertical connecting plate and the components below it.

[0039] The vertical connecting plate includes a first vertical connecting plate 13 and a second vertical connecting plate 14. The two vertical connecting plates are respectively arranged on both sides of the first vertical embedded plate 11 and the second vertical embedded plate 12. The two vertical connecting plates ensure that the connection between the first vertical embedded plate 11 and the second vertical embedded plate 12 is more secure.

[0040] The vertical first embedded plate 11 and the vertical second embedded plate 12 are embedded in the concrete tower section and are also connected to multiple vertical studs 15. The presence of vertical studs 15 can improve the connection strength between the vertical first embedded plate 11 and the concrete tower section, and between the vertical second embedded plate 12 and the concrete tower section, and enhance the tensile properties of the first embedded plate 11 and the vertical second embedded plate 12.

[0041] The transverse connector 19 includes a first transverse embedded plate 4 pre-embedded at both ends of the first concrete tower piece 2, i.e., a first transverse embedded plate 4 is pre-embedded at both ends of the first concrete tower piece 2, and a second transverse embedded plate 5 pre-embedded at both ends of the second concrete tower piece 3, i.e., a second transverse embedded plate 5 is pre-embedded at both ends of the second concrete tower piece 3. Both the first transverse embedded plate 4 and the second transverse embedded plate 5 have multiple through holes on their exposed portions. When the first concrete tower piece 2 and the second concrete tower piece 3 need to be connected to form a concrete tower section, the first transverse embedded plate 4 and the second transverse embedded plate 5... 5. A transverse connecting plate is provided on the outer side of the exposed part. The transverse bolts 9 pass through the through holes of the transverse connecting plate and the first transverse embedded plate 4 and the second transverse embedded plate 5 and are then locked and fixed with transverse adjustable double nuts 10. That is, some of the transverse bolts 9 pass through the through holes on the transverse connecting plate and the first transverse embedded plate 4 and are then locked and fixed with transverse adjustable double nuts 10, and some of the transverse bolts 9 pass through the through holes on the transverse connecting plate and the second transverse embedded plate 5 and are then locked and fixed with transverse adjustable double nuts 10. The transverse connecting plate connects the first transverse embedded plate 4 and the second transverse embedded plate 5 together to form a complete concrete tower section.

[0042] The transverse connecting plate includes a first transverse connecting plate 6 and a second transverse connecting plate 7, which are respectively disposed on both sides of the first transverse embedded plate 4 and the second transverse embedded plate 5. The two transverse connecting plates ensure a more secure connection between the first transverse embedded plate 4 and the second transverse embedded plate 5.

[0043] The first horizontal embedded plate 4 and the second horizontal embedded plate 5 are embedded in the first concrete tower piece 2 and the second concrete tower piece 3, and are also connected to a number of horizontal studs 8. The presence of horizontal studs 8 can improve the connection strength between the first horizontal embedded plate 4 and the first concrete tower piece 2, and between the second horizontal embedded plate 5 and the second concrete tower piece 3, and enhance the tensile properties of the first horizontal embedded plate 4 and the second horizontal embedded plate 5.

[0044] When two adjacent concrete tower sections are fixedly connected together at their top and bottom by multiple vertical connectors 18, a transition support plate 20 is provided between the first vertical embedded plate 11 and the second vertical embedded plate 12 above it. When two adjacent concrete tower sections are fixedly connected together by multiple vertical connectors 18, the weight of the upper concrete tower section is transferred to the vertical bolts 16 through the second vertical embedded plate 12, and then to the lower concrete tower section through the first vertical embedded plate 11. Figure 7 and Figure 8It is known that there is a gap between the vertical first embedded plate 11 and the vertical second embedded plate 12. Therefore, the vertical second embedded plate 12 has a certain shearing effect on the vertical bolt 16 passing through it. Therefore, a transition support plate 20 is provided between the vertical first embedded plate 11 and the vertical second embedded plate 12 above it. The transition support plate 20 supports the vertical second embedded plate 12 above it, thereby reducing the shearing force of the vertical second embedded plate 12 on the vertical bolt 16.

[0045] The first concrete tower section 2 and the second concrete tower section 3 are provided with protrusions 21 at the top, bottom, and side ends. The protrusions 21 at the top and bottom of the first concrete tower section 2 and the second concrete tower section 3 are located outside the vertical connector 18, while the protrusions 21 at the side ends of the first concrete tower section 2 and the second concrete tower section 3 are located outside the horizontal connector 19. After multiple concrete tower sections are connected to each other, adjacent protrusions 21 are connected and fixed together by protective plates 22. If the vertical connector 18 and the horizontal connector 19 are directly exposed to the external environment, their service life will inevitably be shortened due to the influence of weather such as rain and snow. Therefore, protective plates 22 are provided to cover the vertical connector 18 and the horizontal connector 19, thereby improving their service life.

[0046] The width of the circumferentially arranged protective plate 22 is equal to the gap between two adjacent concrete tower sections, and the width of the vertically arranged protective plate 22 is equal to the gap between the first concrete tower section 2 and the second concrete tower section 3. The end of the circumferentially arranged protective plate 22 contacts the side wall of the vertically arranged protective plate 22. This structure allows the protective plate 22 to completely block the gap between the first concrete tower section 2 and the second concrete tower section 3, as well as the gap between two adjacent concrete tower sections, resulting in better protection.

[0047] After two adjacent concrete tower sections are connected, a protective plate 22 is used to cover the gap between them. Specifically, the inner surface of the protective plate 22 can be fixed to the outer surface of the protrusion 21 by adhesive bonding. This connection method makes the surface of the protective plate 22 a complete surface, which can improve its service life in harsh natural environments. Other connection methods (such as expansion bolt connections) will cause some damage to the protective plate 22 when the connector passes through it. Over time, the protective plate 22 is easily damaged starting from the point where the connector passes through.

[0048] The construction method of the fully assembled wind turbine tower bolt connection structure of this utility model includes the following steps:

[0049] S1: When the prefabrication plant produces the first concrete tower segment 2 and the second concrete tower segment 3, the horizontal first embedded plate 4, the horizontal second embedded plate 5, the vertical first embedded plate 11, and the vertical second embedded plate 12 are embedded therein. Before this, horizontal studs 8 are first installed on the horizontal first embedded plate 4 and the horizontal second embedded plate 5, and vertical studs 15 are installed on the vertical first embedded plate 11 and the vertical second embedded plate 12. Then, the end with the stud is embedded into the first concrete tower segment 2 and the second concrete tower segment 3.

[0050] S2: The produced first concrete tower section 2 and second concrete tower section 3 are transported to the site, and several first concrete tower sections 2 and second concrete tower sections 3 are connected and fixed together by a transverse connecting plate to form concrete tower sections.

[0051] S3: After the bottom concrete tower section is installed, the upper concrete tower section is hoisted and fixedly connected to the upper and lower concrete tower sections by the vertical connecting plate and the transition support plate 20, thereby realizing the fixed connection of the upper and lower concrete tower sections.

[0052] S4: Install protective plate 22 on the protrusion 21 of the fixed concrete tower section;

[0053] S5: Repeat step S4 until the entire concrete tower 1 is assembled.

Claims

1. A fully prefabricated wind turbine tower bolt connection structure, characterized in that: The concrete tower (1) is composed of multiple concrete tower segments connected to each other. The top and bottom of two adjacent concrete tower segments are fixedly connected together by multiple vertical connectors (18). Each concrete tower segment includes a first concrete tower piece (2) and a second concrete tower piece (3) with two semi-circular structures. The openings of the first concrete tower piece (2) and the second concrete tower piece (3) are arranged facing each other, and the adjacent ends of the two are fixedly connected together by multiple horizontal connectors (19). The vertical connector (18) includes a vertical first embedded plate (11) embedded vertically at the top of the concrete tower section and a vertical second embedded plate (12) embedded vertically at the bottom of the concrete tower section. The exposed parts of the vertical first embedded plate (11) and the vertical second embedded plate (12) are provided with through holes. The vertical first embedded plate (11) of the lower concrete tower section and the vertical second embedded plate (12) of the upper concrete tower section are provided with vertical connecting plates. The vertical bolt (16) passes through the vertical connecting plate and the through holes of the vertical first embedded plate (11) and the vertical second embedded plate (12) and is then locked and fixed with vertical adjustable double nuts (17). The transverse connector (19) includes a transverse first embedded plate (4) pre-embedded at the two ends of the first concrete tower plate (2) and a transverse second embedded plate (5) pre-embedded at the two ends of the second concrete tower plate (3). The exposed parts of the transverse first embedded plate (4) and the transverse second embedded plate (5) are provided with through holes. A transverse connecting plate is provided on the outside of the exposed parts of the transverse first embedded plate (4) and the transverse second embedded plate (5). The transverse bolt (9) passes through the through holes of the transverse connecting plate and the transverse first embedded plate (4) and the transverse second embedded plate (5) and is then locked and fixed with a transverse adjustable double nut (10).

2. The fully assembled wind turbine tower bolt connection structure according to claim 1, characterized in that: The vertical connecting plate includes a first vertical connecting plate (13) and a second vertical connecting plate (14), which are respectively set on both sides of the first vertical embedded plate (11) and the second vertical embedded plate (12).

3. The fully assembled wind turbine tower bolt connection structure according to claim 1, characterized in that: The vertical first embedded plate (11) and the vertical second embedded plate (12) are embedded in the concrete tower section and are also connected to a number of vertical studs (15).

4. The fully prefabricated wind turbine tower bolt connection structure according to claim 1, characterized in that: The transverse connecting plate includes a first transverse connecting plate (6) and a second transverse connecting plate (7), with the two transverse connecting plates respectively set on both sides of the first transverse embedded plate (4) and the second transverse embedded plate (5).

5. The fully prefabricated wind turbine tower bolt connection structure according to claim 1, characterized in that: The first horizontal embedded plate (4) and the second horizontal embedded plate (5) are embedded in the first concrete tower piece (2) and the second concrete tower piece (3) and are also connected to a number of horizontal studs (8).

6. The fully assembled wind turbine tower bolt connection structure according to claim 1, characterized in that: When the top and bottom of two adjacent concrete tower sections are fixedly connected together by multiple vertical connectors (18), a transition support plate (20) is provided between the first vertical embedded plate (11) and the second vertical embedded plate (12) above it.

7. The fully prefabricated wind turbine tower bolt connection structure according to claim 1, characterized in that: The first concrete tower section (2) and the second concrete tower section (3) are provided with protrusions (21) at the top, bottom and side ends. The protrusions (21) are located outside the vertical connector (18) and the horizontal connector (19). After multiple concrete tower sections are connected to each other, adjacent protrusions (21) are connected and fixed together by protective plates (22).

8. The fully assembled wind turbine tower bolt connection structure according to claim 7, characterized in that: The width of the circumferentially arranged protective plate (22) is equal to the gap between two adjacent concrete tower sections, and the width of the vertically arranged protective plate (22) is equal to the gap between the first concrete tower section (2) and the second concrete tower section (3). The end of the circumferentially arranged protective plate (22) is in contact with the side wall of the vertically arranged protective plate (22).

9. The fully assembled wind turbine tower bolt connection structure according to claim 7, characterized in that: The inner surface of the protective plate (22) is bonded and fixed to the outer surface of the protrusion (21).

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