Bolt connection structure of full-assembly type wind power tower and construction method of bolt connection structure

Abstract

The invention discloses a bolt connection structure of a full-assembly type wind power tower and a construction method of the bolt connection structure. The concrete tower structurally comprises a concrete tower body, the concrete tower body is formed by connecting a plurality of concrete tower sections, the tops and the bottoms of every two adjacent concrete tower sections are fixedly connected together through a plurality of vertical connecting pieces, and each concrete tower section comprises a first concrete tower piece and a second concrete tower piece which are of a semicircular structure; openings of the first concrete tower piece and the second concrete tower piece are arranged oppositely, and the adjacent ends of the first concrete tower piece and the second concrete tower piece are fixedly connected together through a plurality of transverse connecting pieces. The fully-assembled wind power tower is of an elegant and firm cylindrical structure, all the components are tightly connected through precisely-designed bolt connecting pieces, and a stable and efficient supporting system is formed. The structural design not only improves the attractiveness of the wind power tower, but also realizes qualitative leap in mechanical property, construction efficiency and environmental protection performance.

Description

Technical Field

[0001] The invention relates to a fully assembled wind power tower bolt connection structure and a construction method thereof, belonging to the technical field of wind power generation equipment. Background Art

[0002] As the global energy transition accelerates, wind energy, as an important component of renewable energy, is growing at an unprecedented rate. As the key supporting structure of wind turbines, the performance of wind turbine towers is directly related to the efficiency, safety and long-term operation and maintenance costs of the entire wind power system.

[0003] Traditional wind turbine towers are mostly connected by on-site welding or cast-in-place connection. Although it meets the requirements of strength and stability to a certain extent, this process has many limitations. First, the welding workload is large and the construction period is long, which makes it difficult to adapt to the needs of rapid deployment. Secondly, the 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 emission of pollutants such as smoke and sparks during the welding process does not conform to the current green and environmentally friendly manufacturing concept.

[0004] In recent years, fully assembled 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, the existing fully assembled towers still have bottlenecks in bolt connection technology. On the one hand, the selection and design of bolted connectors are often not targeted, resulting in insufficient connection strength and difficulty in withstanding wind loads and fatigue loads under extreme climatic conditions. On the other hand, the tightness of the connection parts is difficult to control accurately, and looseness during long-term operation can easily lead to structural failure, affecting the safe operation and service life of the wind turbine tower. Summary of the invention

[0005] The purpose of the present invention is to provide a fully assembled wind power tower bolt connection structure and a construction method thereof, so as to achieve more efficient, more reliable and more environmentally friendly wind power tower construction.

[0006] The technical solution of the present invention is: a fully assembled wind power tower bolt connection structure, including a concrete tower, which is formed by a plurality of concrete tower sections connected to each other, and the tops and bottoms of two adjacent concrete tower sections are fixedly connected together via a plurality of vertical connecting members, and each concrete tower section includes a first concrete tower piece and a second concrete tower piece with two semicircular structures, and the first concrete tower piece and the second concrete tower piece are opened and arranged facing each other, and the adjacent ends of the two are fixedly connected together via a plurality of horizontal connecting members.

[0007] In the aforementioned fully assembled wind turbine tower bolt connection structure, the vertical connecting member includes a vertical first embedded plate vertically embedded in the top of the concrete tower section, and a vertical second embedded plate vertically embedded in the bottom of the concrete tower section. The exposed parts of the vertical first embedded plate and the vertical second embedded plate are both provided with penetration holes. A vertical connecting plate is arranged on the outside of the vertical first embedded plate of the concrete tower section below and the vertical second embedded plate of the concrete tower section above. The vertical bolts pass through the vertical connecting plate and the penetration holes of the vertical first embedded plate and the vertical second embedded plate and are then locked and fixed with vertically adjustable double nuts.

[0008] In the aforementioned fully assembled wind power tower bolt connection structure, the vertical connection plate includes a vertical first connection plate and a vertical second connection plate, and the two vertical connection plates are respectively arranged on both sides of the vertical first embedded plate and the vertical second embedded plate.

[0009] In the aforementioned fully assembled wind power tower bolt connection structure, a plurality of vertical bolts are connected to the plates of the vertical first embedded plate and the vertical second embedded plate embedded in the concrete tower section.

[0010] In the aforementioned fully assembled wind turbine tower bolt connection structure, the transverse connecting member includes a transverse first embedded plate transversely embedded at the two ends of the first concrete tower piece, and a transverse second embedded plate transversely embedded at the two ends of the second concrete tower piece. The exposed parts of the first transverse embedded plate and the second transverse embedded plate are both provided with penetration holes, and transverse connecting plates are arranged on the outside of the exposed parts of the first transverse embedded plate and the second transverse embedded plate. The transverse bolts pass through the transverse connecting plate and the penetration holes of the first transverse embedded plate and the second transverse embedded plate and are locked and fixed with transverse adjustable double nuts.

[0011] In the aforementioned fully assembled wind power tower bolt connection structure, the transverse connecting plate includes a first transverse connecting plate and a second transverse connecting plate, and the two transverse connecting plates are respectively arranged on both sides of the first transverse embedded plate and the second transverse embedded plate.

[0012] In the aforementioned fully assembled wind power tower bolt connection structure, the first transverse embedded plate and the second transverse embedded plate are embedded in the first concrete tower piece and the second concrete tower piece, and a plurality of transverse bolts are connected to the plate bodies.

[0013] A construction method for a fully assembled wind power tower bolt connection structure comprises the following steps: S1: When the prefabricated manufacturer produces the first concrete tower segment and the second concrete tower segment, the first transverse embedded plate, the second transverse embedded plate, the first vertical embedded plate and the second vertical embedded plate are embedded therein; S2: transporting the produced first concrete tower segment and the second concrete tower segment to the site, and connecting and fixing the first concrete tower segment and the second concrete tower segment together through a transverse connecting plate to form concrete tower segments; S3: After the bottom concrete tower section is installed, the upper concrete tower section is hoisted, and the vertical first embedded plate and the vertical second embedded plate of the upper and lower concrete tower sections are fixedly connected together through the vertical connecting plate, thereby realizing the fixed connection of the upper and lower concrete tower sections; S4: Repeat step S3 until the entire concrete tower is assembled.

[0014] In the aforementioned construction method of a fully assembled wind turbine tower bolt connection structure, in step S1, bolts are first installed on the first horizontal embedded plate, the second horizontal embedded plate, the first vertical embedded plate and the second vertical embedded plate, and then one end with the bolts installed is embedded in the first concrete tower piece and the second concrete tower piece.

[0015] Beneficial effects of the present invention: Compared with the prior art, the present invention is provided with vertical connectors and transverse connectors. The vertical connectors can well realize the connection between concrete tower sections, and the transverse connectors can well connect two concrete tower sections together to form a complete concrete tower section. The adjacent embedded plates are fixedly connected together by connecting plates between the transverse connectors and the vertical connectors. This structural form has a good anti-torque effect, and bolts are provided at the ends of the embedded plates to improve the connection strength between the embedded plates and the concrete tower sections.

[0016] In summary, the invention adopts the vertical connector and the horizontal connector of the above structure, which improves the bearing capacity and fatigue resistance of the connector, ensuring that a stable connection state can be maintained under extreme working conditions.

[0017] At the same time, advanced preload and torque control technology is used to ensure that each bolt connection can achieve the ideal tightening degree, effectively prevent loosening, and extend the service life of the tower.

[0018] The tower adopts a modular structural design and all tower components are standardized, which facilitates quick assembly and disassembly, greatly shortens the construction period, and reduces construction difficulty and cost.

[0019] The traditional welding process has been abandoned and bolt connection has been adopted to reduce pollutant emissions during the construction process and meet the requirements of green construction.

[0020] Due to the adoption of the above technical solution, the fully assembled wind power tower of the present invention presents an elegant and solid cylindrical structure, and each component is closely connected by a precisely designed bolt connector to form a stable and efficient support system. This structural design not only improves the aesthetics of the wind power tower, but also achieves a qualitative leap in mechanical properties, construction efficiency and environmental performance.

[0021] In summary, the present invention breaks the bottleneck of the existing fully assembled wind power tower in bolt connection technology, and promotes the wind power industry to develop in a more efficient, environmentally friendly and sustainable direction. It can not only improve the stability and efficiency of the wind power generation system, reduce construction costs and environmental impact, but also has broad application prospects and market value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the full assembly of the present invention; Figure 2 A three-dimensional schematic diagram of the assembly and connection of the upper and lower tower sections of the present invention; Figure 3 It is a front view schematic diagram of the assembly connection of the upper and lower tower sections of the present invention; Figure 4 It is a schematic diagram of the assembly connection of the upper and lower tower sections of the present invention; Figure 5 It is a schematic plan view of the tower plate transverse connecting member of the present invention; Figure 6 It is an exploded schematic diagram of the tower plate transverse connecting member of the present invention; Figure 7 It is a front view schematic diagram of the tower vertical connecting member of the present invention; Figure 8 It is an exploded schematic diagram of the tower vertical connecting member of the present invention; Explanation of the accompanying drawings: 1-concrete tower, 2-first concrete tower piece, 3-second concrete tower piece, 4-first horizontal embedded plate, 5-second horizontal embedded plate, 6-first horizontal connecting plate, 7-second horizontal connecting plate, 8-horizontal bolt, 9-horizontal bolt, 10-horizontal 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 bolt, 16-vertical bolt, 17-vertical adjustable double nut, 18-vertical connecting piece, 19-horizontal connecting piece. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] An embodiment of the present invention: A fully assembled wind power tower bolt connection structure includes a concrete tower 1, which is composed of multiple concrete tower sections connected to each other in the vertical direction. The tops and bottoms of two adjacent concrete tower sections are fixedly connected together via multiple vertical connecting members 18 evenly distributed around their circumferential directions. Each concrete tower section includes a first concrete tower piece 2 and a second concrete tower piece 3 with two semicircular structures. The first concrete tower piece 2 and the second concrete tower piece 3 are opened and arranged facing each other, and the adjacent ends of the two are fixedly connected together via multiple horizontal connecting members 19 evenly distributed along the height direction.

[0025] The first concrete tower segment 2 and the second concrete tower segment 3 can be quickly connected together through the transverse connecting piece 19 to form a concrete tower segment, and several concrete tower segments can be quickly fixed together through the vertical connecting piece 18 to form a concrete tower 1.

[0026] The vertical connecting member 18 includes a vertical first embedded plate 11 vertically embedded in the top of the concrete tower section, the vertical first embedded plate 11 is embedded in the top of the first concrete tower piece 2 and the second concrete tower piece 3, and a vertical second embedded plate 12 vertically embedded in the bottom of the concrete tower section, the vertical second embedded plate 12 is embedded in the bottom of the first concrete tower piece 2 and the second concrete tower piece 3, and the exposed parts of the vertical first embedded plate 11 and the vertical second embedded plate 12 are both provided with a plurality of penetration holes. When two adjacent concrete tower sections are connected together, the vertical first embedded plate 11 of the lower concrete tower section is A vertical connecting plate is arranged on the outside of the plate 11 and the vertical second embedded plate 12 of the concrete tower section above it. A part of the vertical bolts 16 pass through the penetration holes on the vertical connecting plate and the vertical first embedded plate 11 and are locked and fixed with vertical adjustable double nuts 17. A part of the vertical bolts 16 pass through the penetration holes on the vertical connecting plate and the vertical second embedded plate 12 and are 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 support of the upper concrete tower section is achieved through the vertical connecting plate and the components below it.

[0027] The vertical connecting plates include a vertical first connecting plate 13 and a vertical second connecting plate 14. The two vertical connecting plates are respectively arranged on both sides of the vertical first embedded plate 11 and the vertical second embedded plate 12. The two vertical connecting plates ensure that the connection between the vertical first embedded plate 11 and the vertical second embedded plate 12 is more firm.

[0028] The plates of the first vertical embedded plate 11 and the second vertical embedded plate 12 embedded in the concrete tower section are also connected with a plurality of vertical bolts 15. The vertical bolts 15 can improve the connection strength between the first vertical embedded plate 11 and the concrete tower section, and between the second vertical embedded plate 12 and the concrete tower section, and enhance the tensile performance of the first vertical embedded plate 11 and the second vertical embedded plate 12.

[0029] The transverse connecting member 19 includes a transverse first embedded plate 4 transversely embedded at the two ends of the first concrete tower 2, that is, the two ends of the first concrete tower 2 are embedded with the transverse first embedded plate 4, and a transverse second embedded plate 5 transversely embedded at the two ends of the second concrete tower 3, that is, the two ends of the second concrete tower 3 are embedded with the transverse second embedded plate 5, and the exposed parts of the transverse first embedded plate 4 and the transverse second embedded plate 5 are both provided with a plurality of penetration holes. When the first concrete tower 2 and the second concrete tower 3 need to be connected to form a concrete tower section, the first transverse embedded plate 4 and the transverse second embedded plate A transverse connecting plate is arranged outside the exposed part, and the transverse bolts 9 are passed through the transverse connecting plate and the penetration holes of the first transverse embedded plate 4 and the second transverse embedded plate 5 and then locked and fixed with the transverse adjustable double nuts 10, that is, a part of the transverse bolts 9 are passed through the transverse connecting plate and the penetration holes of the first transverse embedded plate 4 and then locked and fixed with the transverse adjustable double nuts 10, and a part of the transverse bolts 9 are passed through the transverse connecting plate and the penetration holes of the second transverse embedded plate 5 and then locked and fixed with the transverse adjustable double nuts 10, and the first transverse embedded plate 4 and the second transverse embedded plate 5 are connected together through the transverse connecting plate to form a complete concrete tower section.

[0030] The transverse connecting plates include a first transverse connecting plate 6 and a second transverse connecting plate 7, and the two transverse connecting plates are respectively arranged on both sides of the first transverse embedded plate 4 and the second transverse embedded plate 5. The two transverse connecting plates ensure that the connection between the first transverse embedded plate 4 and the second transverse embedded plate 5 is more firm.

[0031] The first transverse embedded plate 4 and the second transverse embedded plate 5 are embedded in the first concrete tower segment 2 and the second concrete tower segment 3, and a plurality of transverse bolts 8 are connected to the plate bodies. The transverse bolts 8 can improve the connection strength between the first transverse embedded plate 4 and the first concrete tower segment 2, and between the second transverse embedded plate 5 and the second concrete tower segment 3, and enhance the tensile strength of the first transverse embedded plate 4 and the second transverse embedded plate 5.

[0032] A construction method for a fully assembled wind power tower bolt connection structure comprises the following steps: S1: When the prefabricated manufacturer produces the first concrete tower 2 and the second concrete tower 3, the first horizontal embedded plate 4, the second horizontal embedded plate 5, the first vertical embedded plate 11 and the second vertical embedded plate 12 are embedded therein. Prior to this, firstly install the horizontal bolts 8 on the first horizontal embedded plate 4 and the second horizontal embedded plate 5, install the vertical bolts 15 on the first vertical embedded plate 11 and the second vertical embedded plate 12, and then embed the ends with the bolts into the first concrete tower 2 and the second concrete tower 3; S2: The first concrete tower segments 2 and the second concrete tower segments 3 are transported to the site, and a plurality of the first concrete tower segments 2 and the second concrete tower segments 3 are connected and fixed together through transverse connecting plates to form concrete tower segments. S3: After the bottom concrete tower section is installed, the upper concrete tower section is hoisted, and the vertical first embedded plate 11 and the vertical second embedded plate 12 of the upper and lower concrete tower sections are fixedly connected together through the vertical connecting plate, so as to realize the fixed connection of the upper and lower concrete tower sections; S4: Repeat step S3 until the entire concrete tower 1 is assembled.

Claims

1. A fully assembled wind power tower bolt connection structure, characterized in that: The invention comprises a concrete tower (1), wherein the concrete tower (1) is formed by interconnecting a plurality of concrete tower sections, wherein the tops and bottoms of two adjacent concrete tower sections are fixedly connected together via a plurality of vertical connecting members (18), and each concrete tower section comprises a first concrete tower section (2) and a second concrete tower section (3) having two semicircular structures, wherein the first concrete tower section (2) and the second concrete tower section (3) are arranged with openings facing each other, and the adjacent ends of the first concrete tower section (2) and the second concrete tower section (3) are fixedly connected together via a plurality of horizontal connecting members (19).

2. A fully assembled wind power tower bolt connection structure according to claim 1, characterized in that: The vertical connecting member (18) comprises a vertical first embedded plate (11) vertically embedded in the top of the concrete tower section, and a vertical second embedded plate (12) vertically embedded in the bottom of the concrete tower section. The exposed portions of the vertical first embedded plate (11) and the vertical second embedded plate (12) are provided with penetration 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 on the outside. The vertical bolts (16) penetrate the vertical connecting plates and the penetration holes of the vertical first embedded plate (11) and the vertical second embedded plate (12) and are then locked and fixed with vertically adjustable double nuts (17).

3. A fully assembled wind power tower bolt connection structure according to claim 2, characterized in that: The vertical connection plates comprise a vertical first connection plate (13) and a vertical second connection plate (14), and the two vertical connection plates are respectively arranged on both sides of the vertical first embedded plate (11) and the vertical second embedded plate (12).

4. A fully assembled wind power tower bolt connection structure according to claim 2, 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 plurality of vertical bolts (15).

5. The fully assembled wind power tower bolt connection structure according to claim 1, characterized in that: The transverse connecting member (19) comprises a first transverse embedded plate (4) transversely embedded at two ends of the first concrete tower piece (2), and a second transverse embedded plate (5) transversely embedded at two ends of the second concrete tower piece (3). The exposed portions of the first transverse embedded plate (4) and the second transverse embedded plate (5) are provided with penetration holes. The exposed portions of the first transverse embedded plate (4) and the second transverse embedded plate (5) are provided with transverse connecting plates. The transverse bolts (9) are passed through the transverse connecting plate and the penetration holes of 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).

6. A fully assembled wind power tower bolt connection structure according to claim 5, characterized in that: The transverse connecting plates comprise a first transverse connecting plate (6) and a second transverse connecting plate (7), and the two transverse connecting plates are respectively arranged on both sides of the first transverse embedded plate (4) and the second transverse embedded plate (5).

7. The fully assembled wind power tower bolt connection structure according to claim 5, characterized in that: The first transverse embedded plate (4) and the second transverse embedded plate (5) are embedded in the first concrete tower plate (2) and the second concrete tower plate (3), and a plurality of transverse bolts (8) are connected to the plate bodies.

8. A construction method for a fully assembled wind power tower bolt connection structure according to any one of claims 1 to 7, characterized in that: The following steps are included: S1: When a prefabricated manufacturer produces a first concrete tower segment (2) and a second concrete tower segment (3), a first transverse embedded plate (4), a second transverse embedded plate (5), a first vertical embedded plate (11), and a second vertical embedded plate (12) are embedded therein; S2: transporting the produced first concrete tower segment (2) and the second concrete tower segment (3) to the site, and connecting and fixing the first concrete tower segment (2) and the second concrete tower segment (3) together through a transverse connecting plate to form concrete tower segments; S3: After the bottom concrete tower section is installed, the upper concrete tower section is hoisted, and the vertical first embedded plate (11) and the vertical second embedded plate (12) of the upper and lower concrete tower sections are fixedly connected together through the vertical connecting plate, thereby achieving fixed connection of the upper and lower concrete tower sections; S4: Repeat step S3 until the entire concrete tower (1) is assembled.

9. The construction method of a fully assembled wind power tower bolt connection structure according to claim 8, characterized in that: In the step S1, bolts are first installed on the first transverse embedded plate (4), the second transverse embedded plate (5), the first vertical embedded plate (11) and the second vertical embedded plate (12), and then one end with the bolts installed is embedded in the first concrete tower segment (2) and the second concrete tower segment (3).

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