Socket type concrete tower for wind power generation

Abstract

The application relates to the field of wind power generation technology, in particular to a socket type concrete tower for wind power generation, which comprises at least two axially connected concrete tower sections, two adjacent concrete tower sections are connected through a socket structure, the socket structure comprises an upper end socket and a lower end socket, the upper end socket is arranged at the bottom of the upper concrete tower section, the lower end socket is arranged at the top of the lower concrete tower section, and the upper end socket and the lower end socket are connected in a nested mode; a socket guide ring with curvature is arranged on the inner wall of the upper end socket, and a socket contact curved surface matched with the socket guide ring is arranged on the outer wall of the lower end socket. The application can uniformly disperse loads through a progressive stress transmission interface, can enhance the shearing capacity through mechanical interlocking, and can improve the connection reliability and the overall mechanical performance of the tower under the action of wind load and bending moment.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a socket-type concrete tower for wind power generation. Background Technology

[0002] In the field of wind power generation, the tower, as the core component supporting the wind turbine generator, directly affects the safety and stability of the power generation system. Traditional wind turbine towers mostly use steel structures, which, while possessing high strength, suffer from high costs, susceptibility to corrosion, and frequent maintenance. Concrete towers, on the other hand, offer advantages such as low cost and good weather resistance, but their traditional connection methods, such as flange connections or grouted sleeve connections, have drawbacks including complex construction, a large amount of on-site work, and significant stress concentration. These problems not only increase construction and maintenance costs but also limit the widespread application of wind power projects in complex environments.

[0003] To address the shortcomings of the aforementioned technologies, the inventors discovered that: existing devices often employ straight cylindrical or single-curvature connection surfaces, leading to concentrated load transfer in localized areas and a tendency for concrete cracking; the flange connections of steel tower structures rely on bolt preload, which can easily loosen under long-term vibration, resulting in fatigue cracks. Furthermore, the shear resistance design of existing devices often relies on mortar filling or simple tongue-and-groove joints, resulting in weak shear resistance and a tendency for slippage or detachment under strong wind loads. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a socket-type concrete tower for wind power generation, which can distribute loads and enhance the overall integrity of tower segment connections and wind and earthquake resistance.

[0005] The technical solution adopted by this invention to solve its technical problem is: A socket-type concrete tower for wind power generation includes at least two axially connected concrete tower sections. Adjacent concrete tower sections are connected by a socket structure, which includes an upper socket and a lower insertion port. The upper socket is located at the bottom of the upper concrete tower section, and the lower insertion port is located at the top of the lower concrete tower section. The upper socket and the lower insertion port are nested together. A curved socket guide ring is provided on the inner wall of the upper socket, and a insertion contact surface adapted to the socket guide ring is provided on the outer wall of the lower insertion port.

[0006] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves the effect of uniformly distributing loads through a progressive stress transfer interface and enhancing shear resistance through mechanical interlocking by coordinating the various parts of the socket structure, thereby improving the connection reliability and overall mechanical performance of the tower under wind load and bending moment.

[0007] As a preferred embodiment, a further technical solution of the present invention is: Preferably, the bottom of the upper socket is provided with a socket shear groove, which surrounds the inner wall of the upper socket; the top of the lower spigot is provided with a number of annular spigot shear ribs along its inner wall, and the socket shear groove engages with the annular spigot shear ribs.

[0008] Preferably, the upper socket is also provided with a number of socket positioning keys at circumferential intervals, and the lower insertion port is provided with corresponding insertion keyways at the positions of the socket positioning keys.

[0009] Preferably, the socket positioning key is a wedge-shaped structure with an inclined surface on the inner side, and the keyway of the socket is provided with a slope that matches the inclined surface.

[0010] Preferably, the cross-section of the socket shear groove is trapezoidal, and each annular socket shear rib is provided with a chamfer structure that matches the socket shear groove.

[0011] Preferably, it also includes a transfer mechanism, which includes a flange that is pre-embedded in the upper end face of the top concrete tower section.

[0012] Preferably, a cover plate is also provided on the upper end face of the top concrete tower section. The cover plate is connected to the upper end face of the top concrete tower section through an elastic sealing ring, and the elastic sealing ring is placed inside the flange.

[0013] Preferably, a concrete protective boss is provided at the upper end of the top concrete tower section on the outer periphery of the flange, and a water guiding slope is provided on the outer edge of the protective boss. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the present invention; to illustrate the socket structure, this figure is a cross-sectional view of the tower segment connection structure; Figure 2 This is a schematic diagram of the upper concrete tower section in this invention; Figure 3 This is a schematic diagram of the lower concrete tower section in this invention; Figure 4 This is a schematic diagram of the installation of a partial structure in the socket structure of this invention; Figure 5 This is a schematic diagram of the transfer mechanism in this invention; Figure 6 yes Figure 1 Enlarged view of part A in the image; Explanation of reference numerals in the attached drawings: 1. Concrete tower section; 101. Upper concrete tower section; 102. Lower concrete tower section; 2. Socket structure; 201. Socket guide ring; 202. Socket contact surface; 203. Socket shear groove; 204. Annular socket shear rib; 205. Socket positioning key; 206. Socket keyway; 3. Adapter mechanism; 301. Cover plate; 302. Elastic sealing ring; 303. Flange; 304. Protective boss. Detailed Implementation

[0015] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0016] A socket-type concrete tower for wind power generation is composed of at least two axially connected concrete tower sections 1, with adjacent concrete tower sections 1 being nested together by a socket structure 2.

[0017] The socket structure 2 consists of an upper socket and a lower spigot. The upper socket is placed at the bottom of the upper concrete tower section 101, and the lower spigot is placed at the top of the lower concrete tower section 102. The two concrete tower sections 1 are connected to each other by nesting the upper socket and the lower spigot.

[0018] A continuously variable curvature guide ring 201 is provided on the inner wall of the upper socket. The guide ring 201 smoothly transitions from a small curvature section at the top to a large curvature section at the bottom (the curvature is greatest at the bottom of the guide ring 201, and increases upwards from the bottom). A socket connection surface that engages with the guide ring 201 is provided on the outer wall of the lower spigot, forming a progressive stress transfer interface. The variable curvature design of the guide ring 201 provides progressive guidance during the assembly of the upper and lower tower sections, reducing docking resistance, ensuring coaxiality, and simultaneously optimizing stress distribution through gradual curvature changes, thus improving the fatigue resistance of the connection.

[0019] The bottom of the upper socket is provided with a shear-resistant ring groove 203, which surrounds the inner wall of the upper socket. The top of the lower spigot is provided with several annular shear-resistant ribs 204 spaced circumferentially along its inner wall. The shear-resistant ring groove 203 and the annular shear-resistant ribs 204 form a mechanical interlocking structure after the upper and lower tower sections are assembled. The shear-resistant ring groove 203 has a trapezoidal cross-section and a depth of 20%-30% of the wall thickness. Furthermore, chamfered structures adapted to the shear-resistant ring groove 203 are provided on both sides of the ends of the annular shear-resistant ribs 204.

[0020] The trapezoidal cross-section socket shear-resistant ring groove 203 is matched with the annular socket shear-resistant protrusion 204 with a chamfered structure. This design not only enhances the shear strength but also facilitates alignment and embedding during installation. Furthermore, the mechanical interlocking structure formed by the two can effectively resist lateral shear force and enhance the integrity of the tower section connection and its wind and earthquake resistance.

[0021] At least six socket positioning keys 205 are evenly arranged circumferentially at the bottom of the upper socket. Corresponding to the positions of the socket positioning keys 205, the lower spigot has corresponding spigot keyways 206. In this embodiment, the socket positioning keys 205 are wedge-shaped structures with bevels, and the spigot keyways 206 have slopes adapted to the bevels of the socket positioning keys 205, with an angle ranging from 15° to 25°. Through the cooperation of the socket positioning keys 205 and the spigot keyways 206, rapid and accurate positioning of the tower section can be achieved, reducing assembly deviations.

[0022] A transition mechanism 3 is provided at the top of the top section of the concrete tower. The transition mechanism 3 includes a flange 303, which is embedded in the upper end face of the top concrete tower section.

[0023] A cover plate 301 is also provided on the upper end face of the top concrete tower section. The cover plate 301 is connected to the upper end face of the top concrete tower section through an elastic sealing ring 302, and the elastic sealing ring 302 is placed inside the flange 303. The combination of the cover plate 301 and the elastic sealing ring 302 can effectively prevent rainwater from seeping into the prestressing channel (inside the tower).

[0024] The top concrete tower section has a concrete protective boss 304 on the outer periphery of the flange 303 at the upper end. The outer edge of the protective boss 304 is provided with a water guiding slope to facilitate drainage.

[0025] In practical applications, in the construction of new wind power plants, multiple concrete tower sections 1 need to be connected sequentially to build a tall tower to support the wind turbine. Taking the connection of two concrete tower sections 1 as an example, the lower end socket and the upper end bearing are first joined together. Adjacent concrete tower sections 1 are axially connected through the socket structure 2. The bearing guide ring 201 on the inner wall of the upper bearing engages with the contact surface 202 of the lower end socket. During insertion, the bottom of the bottom bearing guide ring 201 contacts the contact surface 202 first, and the bearing guide ring 201 gradually embeds itself along the contact surface 202. At the same time, the bearing positioning keys 205 evenly distributed around the inner wall of the bearing cooperate with the guide section of the keyway 206 to limit radial offset and accurately position the insertion direction, reduce assembly resistance, and ensure rapid alignment of the tower sections.

[0026] Secondly, as the spigot structure extends deeper into the socket, the contact area between the socket guide ring 201 and the spigot contact surface 202 gradually increases. The load is gradually transferred from top to bottom through the curved contact interface, avoiding local stress concentration. The spigot contact surface 202 and the guide ring's curved surface mesh to form a flexible force transmission interface, which evenly distributes the external load to the entire connection area, improving the overall deformation resistance of the tower.

[0027] When the spigot structure is inserted to the end, the shear groove 203 of the socket and the shear rib 204 of the annular spigot are fully engaged to form a mechanical interlocking structure. This structure effectively resists lateral shear force, prevents relative slippage of the tower section, enhances the shear strength of the connection interface, and ensures the stability of the tower under dynamic loads through the engagement of the shear rib 204 of the annular spigot with the shear groove 203 of the socket.

[0028] A cover plate 301 is installed at the top of the top tower section through an elastic sealing ring 302 to prevent rainwater from flowing back into the tower, and the elastic sealing ring 302 blocks water from seeping into the connection seam; rainwater on the flange 303 can be discharged in time along the water guide slope to avoid corrosion of the flange 303.

[0029] After each concrete tower section 1 is connected by the socket structure 2, a continuous load-bearing structure is formed. External loads are transmitted to the entire tower through the curved contact and mechanical interlock of the socket interface. The progressive force transmission characteristics of the variable curvature guide ring and the shear interlock structure work together to make the stress distribution uniform.

[0030] 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 socket-type concrete tower for wind power generation, comprising at least two axially connected concrete tower sections, characterized in that: Two adjacent concrete tower sections are connected by a socket structure, which includes an upper socket and a lower spigot. The upper socket is placed at the bottom of the upper concrete tower section, and the lower spigot is placed at the top of the lower concrete tower section. The upper socket and the lower spigot are nested together. The inner wall of the upper socket is provided with a curved socket guide ring, and the outer wall of the lower spigot is provided with a spigot contact surface that matches the socket guide ring. The bottom of the upper socket is provided with a socket shear groove, which surrounds the inner wall of the upper socket; the top of the lower spigot is provided with several annular spigot shear ribs along its inner wall, and the socket shear groove is engaged with the annular spigot shear ribs. The upper socket is also provided with several socket positioning keys at circumferential intervals, and the lower socket is provided with corresponding socket keyways at the positions of the socket positioning keys. It also includes a transfer mechanism, which includes a flange that is pre-embedded in the upper end face of the top concrete tower section; A cover plate is also provided on the upper end face of the top concrete tower section. The cover plate is connected to the upper end face of the top concrete tower section through an elastic sealing ring, and the elastic sealing ring is placed inside the flange. The top concrete tower section has a concrete protective boss on the outer periphery of the flange at its upper end, and a water-guiding slope is provided on the outer edge of the protective boss.

2. The socket-type concrete tower for wind power generation according to claim 1, characterized in that: The socket positioning key is a wedge-shaped structure with an inner bevel, and the spigot keyway has a slope that matches the bevel.

3. The socket-type concrete tower for wind power generation according to claim 1, characterized in that: The cross-section of the socket shear groove is trapezoidal, and each annular socket shear rib is provided with a chamfer structure that matches the socket shear groove.

Images