A non-welded accessory connection structure of a wind power tower drum, a wind power tower drum and a construction method thereof

Abstract

The application discloses a non-welding accessory connecting structure of a wind power tower drum, the wind power tower drum and a construction method thereof, and relates to the technical field of wind power generation equipment. Technical scheme points of the application are as follows: the application comprises a rooting piece for connecting with an accessory structure, a structural adhesive layer coated between a mounting surface of the rooting piece and an inner wall of a tower drum body, and a resin fiber composite material coating layer which is cured and formed to wrap a root part of the rooting piece and is fixedly connected with the inner wall of the tower drum body through the structural adhesive layer. The application can effectively disperse stress generated by accessory load, avoid a welding heat affected zone, welding residual stress and stress concentration at a welding toe, eliminate negative effects of welding of the accessory on fatigue strength of a main steel plate of the tower drum, and make the fatigue strength grade of the main steel plate not be reduced due to connecting details.

Description

Technical Field

[0001] This invention relates to the field of wind power generation equipment technology, and more specifically, to a non-welded accessory connection structure for a wind turbine tower, a wind turbine tower, and a construction method thereof. Background Technology

[0002] As a clean and renewable energy source, wind power equipment is developing towards larger scale and higher efficiency. The wind turbine tower, as a key load-bearing structure supporting the entire wind turbine, is crucial for its safety, economy, and service life. With the continuous increase in wind turbine power and rotor diameter, the loads acting on the tower, especially the long-term alternating fatigue loads, are also increasing dramatically. Under the influence of complex wind loads and turbine operating load spectra, the weld fatigue life of the main welded structure of the tower has become one of the core design constraints.

[0003] In traditional wind turbine tower manufacturing, various internal auxiliary structures, such as ladders, cable supports, and platforms, are commonly welded directly to the inner wall of the tower body. While this welded connection easily meets static strength requirements, it leads to serious fatigue performance degradation. The heat-affected zone generated during welding, residual welding stress, and inherent geometric stress concentration at the weld toe significantly reduce the fatigue strength of the base steel plate in that connection area. According to steel structure fatigue design specifications, a steel plate without connecting details has a high fatigue strength rating, but once accessories are welded, the fatigue strength rating in that area drops sharply due to stress concentration, becoming a weak point in the entire tower structure. To ensure the safety of the tower throughout its entire lifespan, the tower steel plate wall thickness must be generally increased due to the welding of local accessories to compensate for the overall reduction in fatigue strength. This directly results in a significant increase in material usage, structural weight, and manufacturing costs.

[0004] Therefore, how to study and design a non-welded accessory connection structure for wind turbine towers that can overcome the above-mentioned defects, as well as wind turbine towers and their construction methods, are urgent problems to be solved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a non-welded accessory connection structure for wind turbine towers, a wind turbine tower itself, and a construction method thereof. By employing a composite design combining a structural adhesive layer with a resin fiber composite material coating, the traditional welding connection method is eliminated. After curing, the structural adhesive layer forms a high-strength adhesive interface, initially anchoring the anchoring components to the inner wall of the tower. The subsequently cured resin fiber composite material coating then completely encapsulates the root of the anchoring component and bonds it to the tower wall through the structural adhesive layer. This effectively disperses the stress generated by accessory loads and avoids stress concentration in the weld heat-affected zone, residual welding stress, and weld toe. It also eliminates the negative impact of accessory welding on the fatigue strength of the tower's main steel plate, ensuring that the fatigue strength level of the main steel plate is no longer reduced due to connection details.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: Firstly, a non-welded accessory connection structure for wind turbine towers is provided, comprising: Rooting components, used for connection to auxiliary structures; A structural adhesive layer is applied between the mounting surface of the rooting component and the inner wall of the tower body; A resin fiber composite material coating layer is cured and molded to wrap the roots of the rooting component, and the resin fiber composite material coating layer is bonded and fixed to the inner wall of the tower cylinder by the structural adhesive layer.

[0007] Furthermore, the root portion of the rooting member that contacts the inner wall of the tower cylinder is configured to have an increased area.

[0008] Furthermore, the mounting bottom surface of the rooting member is machined into an arc-shaped surface that matches the curvature of the inner wall of the tower cylinder.

[0009] Furthermore, at a predetermined connection position on the inner wall of the tower cylinder, a pre-laid and cured resin fiber composite material underlayer is provided, and the structural adhesive layer is applied to the resin fiber composite material underlayer.

[0010] Furthermore, the resin fiber composite coating layer is formed by laying and curing multiple layers of resin-impregnated fiber fabric.

[0011] Furthermore, the rooting component is a metal component, with part of its structure pre-embedded in the resin fiber composite material coating layer and part of its structure exposed for connecting the auxiliary structure.

[0012] In a second aspect, a wind turbine tower is provided, including a tower body and at least one non-welded accessory connection structure as described in any one of the first aspects, wherein the non-welded accessory connection structure is fixed to the inner wall of the tower body by the structural adhesive layer and the resin fiber composite material coating layer.

[0013] Thirdly, a construction method for a non-welded accessory connection structure of a wind turbine tower is provided, including the following steps: S1: Perform surface treatment on a predetermined location on the inner wall of the tower cylinder; S2: Apply structural adhesive to the mounting surface of the rooting component; S3: Position the rooting member coated with structural adhesive and press it onto the inner wall of the tower cylinder; S4: After positioning the rooting member and its surrounding area, a resin-impregnated fibrous material is laid to form a covering. S5: The structural adhesive and the resin-impregnated fiber material are cured to form a resin fiber composite material coating layer that bonds the rooting member to the inner wall of the tower cylinder.

[0014] Furthermore, prior to step S2, the method further includes: pre-laying several layers of resin-impregnated fiber material at the predetermined location and pre-curing it to form a resin fiber composite material underlayer.

[0015] Furthermore, in step S4, the number and extent of the resin-impregnated fiber material layers are calculated and determined based on the load magnitude of the auxiliary structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention provides a non-welded accessory connection structure for wind turbine towers. By employing a composite design combining a structural adhesive layer and a resin fiber composite material coating layer, it eliminates the need for traditional welding connections. After curing, the structural adhesive layer forms a high-strength adhesive interface, initially anchoring the anchoring component to the inner wall of the tower. The subsequently cured resin fiber composite material coating layer completely encapsulates the root of the anchoring component and bonds it to the tower wall through the structural adhesive layer. This effectively disperses the stress generated by the accessory load and avoids stress concentration in the weld heat-affected zone, residual welding stress, and weld toe. It also eliminates the negative impact of accessory welding on the fatigue strength of the tower's main steel plate, ensuring that the fatigue strength level of the main steel plate is no longer reduced due to connection details. Comparative analysis shows that this invention, with the resin fiber composite material coating layer covering the anchoring component to form the main adhesive part, has a higher maximum load-bearing capacity than direct bonding of the anchoring component, requires a smaller contact area for the anchoring component, and reduces the overall installation weight.

[0017] 2. This invention optimizes the geometry of the connection interface by constructing the root portion of the anchoring component that contacts the inner wall of the tower cylinder with an enlarged area, such as a flange shape, and further machining its mounting bottom surface into an arc shape that matches the curvature of the inner wall of the tower cylinder. Increasing the contact area significantly reduces the average shear stress borne by the structural adhesive layer, improving the static load-bearing capacity and safety margin of the connection. Machining the bottom surface into a matching arc shape ensures maximum tightness between the anchoring component and the curved cylinder wall, reducing adhesive gaps and making load transfer more uniform and smooth. This solves the problem of excessive local stress caused by the difficulty in achieving ideal fit between the anchoring component and the curved cylinder wall, thereby improving the reliability and long-term service stability of the adhesive connection.

[0018] 3. This invention introduces a flexible transition layer between the main steel plate and the main load-bearing covering layer by pre-laying and curing a resin fiber composite material base layer at a predetermined connection position on the inner wall of the tower cylinder, and then applying structural adhesive on it for subsequent construction. This optimizes the stiffness gradient of the connection area, alleviates the stress concentration of interface peeling that may be caused by the difference in stiffness between the anchoring component and the cylinder wall, and provides a better bonding substrate for the structural adhesive. It solves the problem of interface brittleness that may exist when directly bonding on the surface of a high-stiffness steel plate, and further enhances the fatigue resistance and durability of the entire connection structure under complex alternating loads.

[0019] 4. The resin fiber composite material coating layer in this invention is formed by laying and curing multiple layers of resin-impregnated fiber fabric, with the anchoring element being a metal component partially embedded within it. The multi-layer fiber fabric can be laid up according to the principal stress direction, fully utilizing the advantages of the composite material's high designability and high specific strength to achieve the required stiffness and strength with minimal weight. The partial embedding of the metal anchoring element forms a strong mechanical interlocking and chemical bonding bond, ensuring efficient load transfer from the metal component to the composite material coating layer.

[0020] 5. By providing at least one non-welded accessory connection structure as described above on the inner wall of the wind turbine tower, the wind turbine tower product achieves weldless installation of all internal accessories, so that the tower body completely avoids the fatigue strength degradation caused by accessory welding, and allows the entire tower structure to adopt a more optimized thin-wall design based on high fatigue level.

[0021] 6. The present invention ensures that each connection structure can meet specific strength and fatigue life requirements by performing surface treatment, gluing, positioning, laying fiber materials and curing, and calculating and determining the number and range of laying layers based on the load of the auxiliary structure. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the connection structure of the non-welded accessory connection structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the root enlargement process of the rooting component in an embodiment of the present invention; Figure 3 This is a schematic diagram of the overall structure of the wind turbine tower in an embodiment of the present invention.

[0023] The attached diagram shows the markings and corresponding component names: 101. Tower body; 102. Rooting component; 103. Resin fiber composite material coating layer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Example 1: A non-welded accessory connection structure for wind turbine towers, such as... Figure 1As shown, it is mainly composed of three parts working together: the rooting member 102 for transferring load, the structural adhesive layer that plays a role in interfacial bonding, and the resin fiber composite material coating layer 103 that provides overall coating reinforcement. The present invention can avoid welding on the steel plate of the tower body 101, thereby eliminating the adverse effects of the welding heat-affected zone and stress concentration on the fatigue performance of the tower body 101 base material.

[0029] The anchoring component 102 is the load-bearing part in this connection structure that is directly connected to the auxiliary structure. The anchoring component 102 is typically made of metal, such as steel plate. Its design is divided into two functional areas. One part of the structure is used for exposed connections to auxiliary structures such as ladders and cable supports; this exposed part may have bolt holes or welded plates. The other part of the structure is called the root, which is specifically designed for bonding with the inner wall of the tower body 101. To ensure more even load distribution and improve connection reliability, the root of the anchoring component 102 needs to be enlarged, for example, by designing it as a square plate or flange shape. Figure 2 As shown. In addition, to ensure that the root can fully fit the curved cylinder wall, its mounting bottom surface needs to be machined into an arc-shaped surface that matches the curvature of the inner wall of the tower cylinder 101.

[0030] The structural adhesive layer is a key material layer for forming a reliable bonding interface. This structural adhesive layer is applied between the mounting surface of the rooting member 102 and the inner wall of the tower body 101. During construction, the steel plate surface of the inner wall of the tower body 101 must be rigorously cleaned, derusted, and roughened to achieve the best bonding effect. Before curing, the structural adhesive layer is fluid, fully filling the microscopic gaps between the rooting member 102 and the tower wall. After curing, it forms an elastic layer with high shear strength and peel strength, initially bonding the rooting member 102 to the predetermined position and serving as the bonding substrate for the subsequent covering layer and the steel plate.

[0031] The resin fiber composite coating layer 103 is the main component for structural reinforcement and final curing. This coating layer is made of resin-impregnated fiber fabric, such as fiberglass cloth or carbon fiber cloth, laid in multiple layers and cured. During construction, resin-impregnated fiber fabric is laid layer by layer manually or using a mold on the positioned and initially bonded rooting member 102 and its surrounding cylinder wall area, ensuring that the roots of the rooting member 102 are completely enclosed. Subsequently, the resin is cured at room temperature or under heated conditions, forming a high-strength resin fiber composite coating layer 103 together with the fiber fabric. This coating layer not only firmly encloses the roots of the rooting member 102, but it is also bonded to the inner wall of the tower cylinder 101 through the underlying structural adhesive layer, thus forming a composite structure that anchors the rooting member 102 to the tower cylinder 101.

[0032] To further improve the performance of the connection zone, several layers of resin-impregnated fiber material can be pre-laid and pre-cured at predetermined connection positions on the inner wall of the tower body 101 before applying structural adhesive and laying the main coating layer, forming a resin fiber composite underlayer. This underlayer can help increase the thickness of the bonding transition zone, optimize stress distribution, and further isolate the rooting member 102 from the steel plate.

[0033] The specific working process is as follows: First, the surface of the predetermined position on the inner wall of the tower body 101 is treated. Then, structural adhesive is applied to the mounting surface of the anchoring component 102. Next, the anchoring component 102, coated with structural adhesive, is precisely positioned and pressed against the inner wall of the tower body 101. Then, resin-impregnated fiber material is laid on the positioned anchoring component 102 and its surrounding area to form a covering. Finally, the structural adhesive and resin-impregnated fiber material are completely cured, thereby forming a resin fiber composite material covering layer 103 that bonds the anchoring component 102 to the inner wall of the tower body 101. Before construction, the number of fiber material layers and the coverage area need to be calculated based on the load of the auxiliary structure to ensure connection strength. Through comparative analysis, this invention, by covering the anchoring component 102 with the resin fiber composite material covering layer 103 to form the main bonding part, has a higher maximum load-bearing capacity than direct bonding of the anchoring component 102, requires a smaller contact area of ​​the anchoring component 102, and reduces the overall installation weight.

[0034] Through the aforementioned technology, the auxiliary structures can be reliably fixed to the tower, while avoiding welding operations on the 101 steel plate of the tower body. According to specifications, welding accessories significantly reduces the fatigue grade of the main steel plate, for example, from DC = 180 (without connection details) to DC ≤ 80. However, this invention, by eliminating welding, ensures that the fatigue grade of the main steel plate is no longer reduced due to accessory connections. This allows for the use of a higher fatigue grade for the main weld seams in tower wall thickness calculations during the design phase, ultimately achieving the technical effect of reducing the amount of steel plate used in the tower while maintaining the same fatigue life, thus reducing weight and cost.

[0035] Example 2: A wind turbine tower, such as Figure 3 As shown, it includes a tower body 101, which is usually made of multiple sections of steel plates rolled and welded to form a huge cylindrical or conical shell structure, with an interior space for installing equipment and for personnel passage.

[0036] At least one non-welded attachment connection structure is fixed to the inner wall of the tower body 101. This structure includes a rooting member 102, a structural adhesive layer, and a resin fiber composite material covering layer 103. The rooting member 102 is a metal component that directly connects to internal auxiliary structures of the tower, such as ladders, cable supports, and platforms. The structural adhesive layer is a high-performance adhesive applied between the mounting surface of the rooting member 102 and the inner wall of the tower body 101. The resin fiber composite material covering layer 103 is formed by laying multiple layers of resin-impregnated fiber fabric and then curing it. It tightly wraps the root of the rooting member 102, and the covering layer itself is firmly bonded to the inner wall of the tower body 101 as a whole through the structural adhesive layer below it.

[0037] With the above configuration, all auxiliary structures that need to be installed inside the tower are fixed to the inner wall of the tower body 101 via their respective non-welded attachment connection structures. These connection structures have no welding relationship with the tower body 101; reliable connection is achieved entirely through the adhesive force of the structural adhesive and the overall reinforcement and force transmission effect of the resin fiber composite material coating layer 103. This connection method avoids welding operations on the base steel plate of the tower body 101.

[0038] This invention avoids lowering the fatigue strength rating of the tower body steel plate due to welding of attachments. According to specifications, a standard, uniform cross-section steel plate without connection details can achieve a fatigue rating (DC) of 180. However, when a long strip or cylindrical attachment is welded to this steel plate, the fatigue rating of the main body drops sharply to 80 or lower. This drop necessitates that the tower body be designed with a lower fatigue rating, resulting in a significant increase in the required steel plate thickness.

[0039] In this embodiment of the wind turbine tower, the welding of accessories is completely eliminated, so the 101 steel plate of the tower body no longer suffers fatigue strength degradation due to accessory connections. Therefore, when designing the fatigue life of the tower body, calculations can be performed based on a higher, undiminished fatigue level. This allows for the calculation of a thinner, more economical tower wall thickness while meeting the same design life and safety requirements.

[0040] Example 3: A construction method for a non-welded accessory connection structure of a wind turbine tower, implemented by steps S1-S5.

[0041] Step S1: Perform surface treatment on the predetermined locations on the inner wall of the tower body 101. Construction personnel must accurately determine the installation points of the auxiliary structures on the inner wall of the tower according to the design drawings. Subsequently, the steel plate surface in this area is thoroughly treated, including using grinding tools to remove rust, old paint, and oxide scale until a uniform metallic luster is exposed. Solvent cleaning is then used to remove oil and dust, achieving the necessary cleanliness and roughness of the steel plate surface, thereby increasing the mechanical and chemical bonding force between the structural adhesive layer and the metal substrate.

[0042] To optimize the bonding interface, several layers of resin-impregnated fiber material can be pre-laid and pre-cured at predetermined locations before applying the structural adhesive to form a resin-fiber composite underlayer. Specifically, two to three layers of fiber fabric, such as fiberglass cloth, pre-impregnated with epoxy or vinyl ester resin, are manually laid onto the treated steel plate surface. Air bubbles are removed during laying, ensuring the fabric adheres well to the steel plate. The surface is then left to stand at room temperature for a period or moderately heated to allow the resin to initially gel and cure. This underlayer serves as an isolation layer, provides stress buffering, and increases the bond thickness.

[0043] Step S2: Apply structural adhesive to the mounting surface of the anchoring component 102. The anchoring component 102 is a pre-treated metal connector; its mounting surface in contact with the cylinder wall has been enlarged and machined into an arc shape to match the cylinder wall. The installer selects a high-performance epoxy structural adhesive that meets design requirements and uses a scraper or caulking gun to evenly and fully apply the adhesive to the entire mounting surface of the anchoring component 102, ensuring a continuous, uninterrupted adhesive layer with the specified thickness. The structural adhesive serves as the primary interfacial bonding medium, and its performance directly affects the shear strength of the connection.

[0044] Step S3: Position and press the anchoring component 102, coated with structural adhesive, onto the inner wall of the tower body 101. The operator must accurately place the anchoring component 102 at the predetermined position on the surface-treated or resin fiber composite substrate, using positioning fixtures to ensure its angle and planar position are accurate. Then, press the anchoring component 102 firmly against the tower wall and adjust it appropriately to ensure the structural adhesive is evenly extruded from all sides, guaranteeing a continuous adhesive layer without large air bubbles and of appropriate thickness.

[0045] Step S4: After positioning the rooting member 102 and its surrounding area, lay resin-impregnated fiber material to form a covering. Construction workers use pre-cut fiber fabrics that have been impregnated with uncured resin on-site or at the factory. Starting from the base of the rooting member 102, layer by layer the resin-impregnated fiber fabric is laid onto the rooting member 102 and the surrounding cylinder wall, ensuring each layer adheres tightly. A special roller is used to carefully roll the fabric to remove air bubbles between layers, allowing the resin to fully impregnate the fibers. The laying area should completely cover the base of the rooting member 102 and extend outwards to form a large reinforced area. Once cured, this covering will become the main load-bearing and force-transmitting component, namely the resin fiber composite coating layer 103.

[0046] The number of resin-impregnated fiber material layers and their coverage area are calculated and determined based on the load magnitude of the auxiliary structure. This calculation is part of the design phase and is usually completed before construction. Designers need to obtain the ultimate load and fatigue load borne at the connection point of the auxiliary structure based on the load spectrum provided by the overall simulation analysis of the wind turbine. Based on this load, the design is carried out according to the mechanics of adhesive joints and the theory of composite laminates. For example, the minimum area required for bonding must satisfy the following relationship: the shear force that the structural adhesive layer can withstand must be greater than the maximum shear force transmitted by the auxiliary structure. The thickness and number of layers of the covering layer need to be calculated or simulated to ensure that it can resist the bending moment transmitted by the anchoring member 102 and avoid the failure of the composite layer itself or its peeling from the steel plate.

[0047] Step S5: Curing of the structural adhesive and resin-impregnated fiber material to form a complete connection structure. After laying, it needs to be left to cure under specified environmental conditions, or heated by heating devices such as heating blankets or infrared lamps to accelerate the chemical reaction of the resin. During the curing process, the structural adhesive and the resin in the coating layer undergo a cross-linking reaction simultaneously, changing from a liquid or viscous state to a hard solid state. After curing, the structural adhesive layer and the resin fiber composite coating layer 103 become a whole, firmly wrapping and bonding the root of the rooting member 102 to the inner wall of the tower body 101, thus ultimately forming a high-strength, high-fatigue-resistance non-welded attachment connection structure.

[0048] Working Principle: This invention abandons the traditional welding connection method by adopting a composite design of structural adhesive layer combined with resin fiber composite material coating layer 103. After curing, the structural adhesive layer forms a high-strength adhesive interface, initially anchoring the anchoring member 102 to the inner wall of the tower body 101. Subsequently, the cured resin fiber composite material coating layer 103 completely wraps the root of the anchoring member 102 and bonds it to the tower wall through the structural adhesive layer. This effectively disperses the stress generated by the accessory load and avoids stress concentration in the welding heat-affected zone, welding residual stress, and weld toe. It also eliminates the negative impact on the fatigue strength of the tower body steel plate caused by accessory welding, ensuring that the fatigue strength level of the main steel plate is no longer reduced due to connection details.

[0049] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A non-welded attachment connection structure of a wind turbine tower, characterized by, include: An anchoring component (102) is used for connection with an auxiliary structure; A structural adhesive layer is applied between the mounting surface of the rooting member (102) and the inner wall of the tower body (101); A resin fiber composite material coating layer (103) is cured and molded to wrap the root of the rooting member (102), and the resin fiber composite material coating layer (103) is bonded and fixed to the inner wall of the tower body (101) by the structural adhesive layer.

2. A non-welded attachment connection structure for a wind turbine tower section according to claim 1, characterized in that The root portion of the rooting member (102) that contacts the inner wall of the tower body (101) is configured to have an increased area.

3. The non-welded accessory connection structure for a wind turbine tower according to claim 2, characterized in that, The mounting bottom surface of the rooting member (102) is machined into an arc-shaped surface that matches the curvature of the inner wall of the tower body (101).

4. The non-welded accessory connection structure for a wind turbine tower according to claim 1, characterized in that, At a predetermined connection position on the inner wall of the tower body (101), a pre-laid and cured resin fiber composite material underlayer is also provided, and the structural adhesive layer is applied to the resin fiber composite material underlayer.

5. The non-welded accessory connection structure for a wind turbine tower according to claim 1, characterized in that, The resin fiber composite coating layer (103) is formed by laying and curing multiple layers of resin-impregnated fiber fabric.

6. The non-welded accessory connection structure for a wind turbine tower according to claim 1, characterized in that, The rooting component (102) is a metal component, part of which is embedded in the resin fiber composite material coating layer (103), and part of which is exposed for connecting the auxiliary structure.

7. A wind turbine tower, comprising a tower body (101), characterized in that, It also includes at least one non-welded accessory connection structure for a wind turbine tower as described in any one of claims 1-6, the non-welded accessory connection structure being fixed to the inner wall of the tower body (101) by the structural adhesive layer and the resin fiber composite material coating layer (103).

8. A construction method for a non-welded accessory connection structure of a wind turbine tower, characterized in that, Includes the following steps: S1: Perform surface treatment on a predetermined position of the inner wall of the tower body (101); S2: Apply structural adhesive to the mounting surface of the rooting component (102); S3: Position and press the rooting member (102) coated with structural adhesive onto the inner wall of the tower body (101); S4: After positioning the rooting member (102) and its surrounding area, a resin-impregnated fibrous material is laid to form a covering; S5: The structural adhesive and the resin-impregnated fiber material are cured to form a resin fiber composite material coating layer (103) that bonds the rooting member (102) to the inner wall of the tower body (101) as a whole.

9. A construction method for a non-welded accessory connection structure of a wind turbine tower according to claim 8, characterized in that, Before step S2, the method further includes: pre-laying several layers of resin-impregnated fiber material at the predetermined position and pre-curing it to form a resin fiber composite material underlayer.

10. A construction method for a non-welded accessory connection structure of a wind turbine tower according to claim 8, characterized in that, In step S4, the number and extent of the resin-impregnated fiber material layers are calculated and determined based on the load magnitude of the auxiliary structure.

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