Wind power tower cylinder reinforcing structure

Abstract

The utility model discloses a kind of wind power tower drum reinforcing structures, comprising: guiding connecting ring, by inner connecting ring and outer connecting ring are formed Annular slide rail between inner connecting ring and outer connecting ring;Connecting plate, top end is connected with the guiding block compatible with the slide rail;Reinforcing plate, vertically connected below the connecting plate;Driving mechanism, including driving motor, rotating column, rack and pinion, the output shaft of driving motor is rotatably connected with the top end of rotating column, the bottom end of rotating column is rotatably connected with the top end of reinforcing plate by rotating shaft, the pinion is set on rotating column, rack is arranged along the inner wall of the upper tower drum ring circumferentially corresponding pinion.The utility model can be along tower drum inner wall circumferentially sliding, no longer limited to fixed position, can better adapt to adjacent tower drum joint place in wind-induced bending process tensile region changes along circumferential direction, improve the pertinence and effectiveness of reinforcing effect.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine tower technology, specifically relating to a wind turbine tower reinforcement structure. Background Technology

[0002] Wind turbine generators typically consist of blades, hub, nacelle, and tower. The tower, as the main supporting structure, bears the weight of the generator as well as wind and operational loads. With the increasing capacity and hub height of wind turbine generators, concrete-steel hybrid towers are becoming increasingly common. These towers usually consist of a lower precast reinforced concrete section and an upper steel section. Adjacent lower precast concrete sections are assembled vertically and clamped together using vertical prestressing, allowing the load to be transferred primarily through contact between the tower section ends and friction at the joints.

[0003] Under the influence of wind loads, turbine operating loads, and structural self-weight, the tower will be subjected to bending moment, shear force, and torque. Due to the interruption of material continuity at the circumferential joints of the precast concrete tower sections, the contact pressure along the circumference of the joint is not uniform. When the tower is subjected to bending, the contact pressure on the compressed side increases, while the contact pressure on the other side decreases. When the bending moment increases or the vertical prestress is insufficient, the joint may experience reduced compaction, contact separation, or opening in local areas. When the tower is subjected to shear force and torque, the joint surface may also exhibit a tendency for relative slippage. Under long-term cyclic loading, the repeated changes in contact state, local opening, or relative slippage of the joint surface may cause an increase in tensile stress, compressive stress, or shear stress in the concrete area adjacent to the joint, resulting in local cracking or damage, which in turn affects the load transfer performance of the circumferential joint, the overall stiffness of the tower, and the structural durability.

[0004] In existing technologies, the stress problem of circumferential joints in precast concrete towers is typically controlled during the design and construction phases by rationally determining the vertical prestress level, optimizing joint dimensions and contact structures, and increasing reinforcement in the vicinity of the joint. When additional reinforcement of the circumferential joint is required after the tower is put into operation, structural adhesive injection, carbon fiber cloth bonding, or the installation of anchor steel plates, vertical steel sections, or support rods on both sides of the joint can be used to allow the reinforcement components to span the circumferential joint and connect adjacent tower sections. However, these additional reinforcement structures are usually connected to the concrete tower via embedded parts, anchors, or fixed mounting bases. Once their installation position and range of action are determined, they are difficult to adjust, making it impossible to adaptively reinforce the constantly changing tension area of ​​the joint along the circumference according to changes in wind direction and tower bending direction. If fixed reinforcement components are installed over a large area along the joint circumference, it will increase the structural self-weight, material consumption, and construction difficulty; the anchoring connection between the fixed components and the concrete tower section may also cause local load concentration, increasing the difficulty of later inspection, maintenance, and replacement.

[0005] Therefore, how to enable the reinforcing components to be circumferentially adjusted according to the deformation or stress state at different positions of the circumferential joint without significantly increasing the self-weight of the tower and the construction difficulty, and to carry out targeted reinforcement for areas with large local opening or tension, while improving the installation convenience and maintainability of the reinforcing structure, is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to provide a wind turbine tower reinforcement structure to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A wind turbine tower reinforcement structure includes a guide connecting ring, a connecting plate, a reinforcement plate, and a drive mechanism. The guide connecting ring consists of an inner connecting ring and an outer connecting ring. The inner connecting ring is fixedly arranged circumferentially along the inner wall of the upper tower ring. The inner connecting ring and the outer connecting ring are fixedly connected by multiple circumferentially arranged fasteners, forming an annular slide rail between them. The connecting plate is vertically arranged close to the inner wall of the upper tower ring, and its top end is connected to a guide block adapted to the slide rail, suitable for locking in the slide rail and driving the connecting plate circumferentially along the slide rail. The reinforcing plate is vertically connected below the connecting plate, and its length extends from the upper tower ring to the lower tower ring connected to the upper tower ring. The driving mechanism includes a drive motor, a rotating column, a rack, and a gear. The drive motor is mounted on the connecting plate by a fixing block. The output shaft of the drive motor is rotatably connected to the top of the rotating column. The bottom of the rotating column is rotatably connected to the top of the reinforcing plate by a rotating shaft. The gear is sleeved on the rotating column, and the rack is arranged circumferentially along the inner wall of the upper tower ring, corresponding to the gear.

[0008] The inner walls of the upper tower ring and the lower tower ring are respectively provided with multiple circumferential sliding grooves, and the reinforcing plate is connected with a slider that matches the sliding groove at the position of the inner wall sliding groove of the upper tower ring and the lower tower ring. The bottom end of the guide block is provided with an upper slot to accommodate the upper end of the guide connecting ring, which is suitable for the connecting plate to be securely locked on the guide connecting ring through the upper slot and slide along the circumference of the guide connecting ring.

[0009] In one alternative embodiment, the end face of the reinforcing plate facing away from the inner wall of the tower has a zigzag structure.

[0010] In one alternative embodiment, a vertical through-hole is provided on the connecting plate, and ear plates are respectively connected to the lower part of the connecting plate extending outward from both sides of the through-hole. A connector is connected to the top of the reinforcing plate. The outer diameter of the connector is smaller than the distance between the two ear plates. Bolt holes are respectively provided on the connector and the ear plates, which are suitable for passing bolts through to lock and fix the connector and the ear plates.

[0011] In one alternative embodiment, the lower part of the connector and the top part of the connecting plate form an inverted L-shaped structure, which is suitable for the connector to be locked at the bottom end of the opening when it is inserted between the two ear plates.

[0012] In one alternative embodiment, the fixing block is fixed to the connecting plate by bolts, and its top end is recessed with a lower retaining groove corresponding to the position of the guide connecting ring, which is suitable for being locked in the lower part of the guide connecting ring so that the connecting plate can slide steadily along the circumference of the guide connecting ring.

[0013] Compared with the prior art, the technical solution of this utility model has the following advantages: 1. This utility model, through the action of the guide connecting ring, connecting plate, reinforcing plate and driving mechanism, enables the entire device to slide circumferentially along the inner wall of the tower, no longer limited to a fixed position. It can better adjust the circumferential direction according to the deformation or stress state of different positions of the circumferential joint, and carry out targeted reinforcement for areas with large local opening or tension, thereby improving the pertinence and effectiveness of the reinforcement.

[0014] 2. By connecting the upper and lower ends of the vertical reinforcing plate to the upper and lower tower rings respectively, a clear axial force transmission channel is formed, enabling the reinforcing plate to bear additional tensile force and constraint under deformation or stress conditions at different positions of the circumferential joint of the upper and lower towers, thereby improving the overall bending resistance of the tower.

[0015] 3. By setting a zigzag inner wall structure on the back of the vertical reinforcement plate, the bending stiffness and stability of the vertical reinforcement plate itself are improved, so that it still has a strong load-bearing capacity under large wind loads or extreme working conditions.

[0016] 4. By providing an upper slot on the guide block and a lower slot on the fixing block, the connecting plate can be securely clamped onto the guide connecting ring and slide along the guide connecting ring. The guide block and fixing block are detachably connected to the connecting plate by bolts, which facilitates the installation, fixing, maintenance and replacement of the entire reinforcement structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 4 A schematic diagram of the split structure; Figure 3 This is a schematic diagram of the structure of this utility model in use; Figure 4 This is a schematic diagram of the structure of this utility model fixed on the upper tower ring; Figure 5 for Figure 4 Enlarged view of point A in the middle; The attached figures are labeled as follows: 1. Upper tower ring; 2. Lower tower ring; 3. Guide connecting ring; 31. Inner connecting ring; 32. Fixing rod; 33. Outer connecting ring; 4. Guide block; 41. Upper slot; 5. Connecting plate; 6. Rack; 7. Slide groove; 8. Reinforcing plate; 81. Sliding block; 82. Folded line structure; 9. Rotating column; 10. Gear; 11. Fixing block; 111. Lower slot; 12. Through port; 13. Connector; 14. Drive motor. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0019] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0020] This utility model provides a wind turbine tower reinforcement structure, including a guide connecting ring 3, a connecting plate 5, a reinforcement plate 8, and a driving mechanism. The guide connecting ring 3 consists of an inner connecting ring 31 and an outer connecting ring 33. The inner connecting ring 31 is fixedly arranged circumferentially along the inner wall of the upper tower ring 1. The inner connecting ring 31 and the outer connecting ring 33 are fixedly connected by multiple circumferentially arranged fasteners, forming an annular slide rail between them. The connecting plate 5 is vertically arranged close to the inner wall of the upper tower ring 1, and its top end is connected to a guide block 4 adapted to the slide rail, suitable for locking in the slide rail and driving the connecting plate along the slide rail. 5. Circumferential sliding; the reinforcing plate 8 is vertically connected below the connecting plate 5, and its length extends from the upper tower ring 1 to the lower tower ring 2 connected to the upper tower ring 1; the driving mechanism includes a drive motor 14, a rotating column 9, a rack 6, and a gear 10. The drive motor 14 is mounted on the connecting plate 5 through a fixing block 11. The output shaft of the drive motor 14 is rotatably connected to the top end of the rotating column 9. The bottom end of the rotating column 9 is rotatably connected to the top end of the reinforcing plate 8 through a rotating shaft. The gear 10 is sleeved on the rotating column 9. The rack 6 is arranged circumferentially along the inner wall of the upper tower ring 1, corresponding to the gear 10.

[0021] In the above embodiment, the outer diameter of the inner connecting ring 31 is slightly smaller than the inner diameter of the upper tower ring 1, so that it fits snugly against the inner wall of the upper tower ring 1. The inner connecting ring 31 can be fixed to the top edge of the upper tower ring 1 by welding, or by other means such as bolt thread holes. The inner connecting ring 31 and the outer connecting ring 33 are fixedly connected by multiple circumferentially spaced fixing rods 32. The fixing rods 32 are connected to the middle of the inner and outer connecting rings 31 and have a certain distance from the top and bottom of the inner and outer connecting rings, thus providing bottom support for the slide rail formed by the inner and outer connecting rings. The connecting plate 5 serves as a support, with the upper part being supported by the guide block 4, which is engaged in the slide rail formed by the inner and outer connecting rings. The lower part is connected to a reinforcing plate 8, the length of which is determined by the upper tower ring. The cylindrical ring 1 extends to the lower tower cylindrical ring 2, forming a cross structure at the joint between the upper tower cylindrical ring 1 and the lower tower cylindrical ring 2. When a part of the joint between the upper and lower tower cylindrical rings or a part near the joint is subjected to tension and bending, the force can be dispersed by the vertically arranged reinforcing plate 8. The rotating column 9 is vertically arranged above the reinforcing plate 8, and its bottom end is rotatably connected to the top end of the reinforcing plate 8. The drive motor 14 is fixed on the bottom end of the fixing block 11, and a storage battery can be fixed at the same time to power the drive motor 14. The output shaft of the drive motor 14 is rotatably connected to the rotating column 9. The fixing block 11 is fixed to the connecting plate 5 by fixing bolts. The upper and lower parts of the rotating column 9 are respectively connected to two gears 10, and two racks 6 are correspondingly arranged. The rack and gear drive the entire reinforcing structure to slide circumferentially along the guide connecting ring through the action of the rack and gear.

[0022] The working principle of the above embodiment is as follows: Before the tower (multiple tower rings are assembled together to form a tower) is installed, the more dangerous places at the joints of the tower rings (generally the lower part of the tower) are calculated by numerical simulation. The reinforcement structure is fixed on the upper tower ring 1 at this joint. The drive of the reinforcement structure is controlled by the control unit. Multiple deformation detection sensors are set at intervals along the circumferential direction on the inner wall of the two tower ring joints. The deformation detection sensors are preferably resistive strain sensors (resistive strain gauges) and are fixedly installed on the flat area of ​​the inner wall of the tower. Their detection direction is consistent with the height direction of the tower. They are used to detect the axial deformation at the tower joint and at different circumferential positions near the joint. Each deformation detection sensor is connected to the controller, and the controller compares the detection data at different positions. When the tensile deformation at a certain location exceeds a preset value and persists for a set time, the controller identifies that location as requiring reinforcement and controls the drive motor 14 to rotate forward or backward based on the current position of the vertical reinforcement structure. The rotation of the drive motor 14 drives the rotating column 9, which in turn drives the gear 10 on it. Since the gear 10 meshes with the rack 6, it moves circumferentially along the rack 6, thereby causing the entire device to slide circumferentially along the guide ring 3. A position detection element is installed on the annular slide rail. When the vertical reinforcement structure reaches the target position, the position detection element sends a position signal to the controller, which then stops the drive motor 14, allowing the vertical reinforcement structure to remain at the location of the tower with the largest tensile deformation and participate in reinforcement. When the main deformation position of the tower changes and continues to exceed the preset value, the controller re-controls the drive motor, moving the vertical reinforcement structure to the new target position, thus continuously and flexibly adjusting the position based on the deformation.

[0023] In one optional embodiment, the inner walls of the upper tower ring 1 and the lower tower ring 2 are respectively provided with multiple circumferential grooves 7, and the reinforcing plate 8 is connected with a slider 81 that is adapted to the groove 7 at the position of the inner wall groove of the upper tower ring 1 and the lower tower ring 2.

[0024] In the above embodiment, the slide groove 7 and the slider 81 can be configured as 12 slide grooves 7 and 12 sliders 81 cooperating with each other. The upper and lower parts of the reinforcing plate 8 can be slidably connected to the upper tower ring 1 and the lower tower ring 2 respectively by utilizing the function of the slide groove 7 and the slider 81. When fixing the reinforcing structure to the inner wall of the tower, the reinforcing plate 8 can be first inserted into the slide groove 7 by the slider 81 and then connected to the connecting plate 5. The function of the slide groove 7 and the slider 81 can not only improve the guiding stability and force reliability of the entire reinforcing structure during the sliding process, and help reduce the sway and local instability of the reinforcing structure, but also form a clear axial force transmission channel since the upper and lower ends of the reinforcing plate 8 are connected to the upper and lower tower rings respectively. This allows the reinforcing plate 8 to bear additional tensile force and constraint under the tension and bending conditions of the tower, thereby improving the overall bending resistance of the tower.

[0025] In one optional embodiment, the end face of the reinforcing plate 8 facing away from the inner wall of the tower is a polygonal structure 82. By providing a polygonal inner wall structure on the back of the reinforcing plate 8, the bending stiffness and stability of the reinforcing plate 8 itself are improved, enabling it to still have a strong load-bearing capacity under large wind loads or extreme working conditions.

[0026] In one optional embodiment, the bottom end of the guide block 4 is provided with an upper slot 41 to accommodate the upper end of the guide connecting ring 3, which is suitable for the connecting plate 5 to be securely fastened to the guide connecting ring 3 through the upper slot 41 and slide along the circumference of the guide connecting ring 3; while the fixing block 11 is fixed to the connecting plate 5 by bolts, and its top end is recessed with a lower slot 111 corresponding to the position of the guide connecting ring 3, which is suitable for being fastened to the lower part of the guide connecting ring 3 so that the connecting plate 5 can slide securely along the circumference of the guide connecting ring 3. By setting the upper and lower split buckle components to hold the guide connecting ring 3, a structural fit that balances connection reliability and sliding ability between the vertical reinforcement structure and the sliding track is achieved, which is convenient for installation, maintenance and replacement.

[0027] In one alternative embodiment, a vertical through-hole 12 is provided on the connecting plate 5, and ear plates are respectively connected to the lower part of the connecting plate 5 extending outward from both sides of the through-hole 12. A connector 13 is connected to the top of the reinforcing plate 8. The outer diameter of the connector 13 is smaller than the distance between the two ear plates. Bolt holes are respectively provided on the connector 13 and the ear plates, which are suitable for passing bolts through to lock and fix the connector 13 and the ear plates.

[0028] In the above embodiment, two connecting holes are respectively opened on both sides of the upper part of the through 12, and two connecting holes are also opened on both sides of the fixing block 11. The connecting holes are used to fix one end of the fixing block 11 to the upper part of the through 12. The two ear plates are connected to the lower part of the through 12. After inserting the connector 13 between the two ear plates, the corresponding bolt holes are aligned, and the connector 13 and the ear plates are fixed together by the bolts.

[0029] In an alternative embodiment, the lower part of the connector 13 and the top part of the connecting plate 5 form an inverted L-shaped structure, which is suitable for the connector 13 to be inserted between the two ear plates and then locked onto the bottom end of the through-hole 12. Specifically, when the connector 13 is locked onto the bottom end of the through-hole 12, the bolt holes on it will be aligned with the bolt holes on the ear plates, thus saving space by locking the connector 13 into the ear plates and the through-hole.

[0030] Although the present invention has been described using the above preferred embodiments, it is not intended to limit the scope of protection of the present invention. Any changes and modifications made by those skilled in the art to the above embodiments without departing from the spirit and scope of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A wind turbine tower reinforcement structure, characterized in that, include: The guide connecting ring consists of an inner connecting ring and an outer connecting ring. The inner connecting ring is fixedly arranged circumferentially along the inner wall of the upper tower ring. The inner connecting ring and the outer connecting ring are fixedly connected by multiple circumferentially arranged fasteners, and an annular slide rail is formed between the inner connecting ring and the outer connecting ring. A connecting plate is vertically positioned close to the inner wall of the upper tower ring, and its top end is connected to a guide block adapted to the slide rail, which is suitable for being locked in the slide rail and sliding along the slide rail to drive the connecting plate to slide circumferentially. A reinforcing plate is vertically connected below the connecting plate, and its length extends from the upper tower ring to the lower tower ring connected to the upper tower ring. The drive mechanism includes a drive motor, a rotating column, a rack, and a gear. The drive motor is mounted on the connecting plate via a fixing block. The output shaft of the drive motor is rotatably connected to the top end of the rotating column. The bottom end of the rotating column is rotatably connected to the top end of the reinforcing plate via a rotating shaft. The gear is sleeved on the rotating column, and the rack is arranged circumferentially along the inner wall of the upper tower ring, corresponding to the gear. The inner walls of the upper tower ring and the lower tower ring are respectively provided with multiple circumferential sliding grooves, and the reinforcing plate is connected with a slider that matches the sliding groove at the position of the inner wall sliding groove of the upper tower ring and the lower tower ring. The bottom end of the guide block is provided with an upper slot to accommodate the upper end of the guide connecting ring, which is suitable for the connecting plate to be securely locked on the guide connecting ring through the upper slot and slide along the circumference of the guide connecting ring.

2. The wind turbine tower reinforcement structure according to claim 1, characterized in that, The end face of the reinforcing plate facing away from the inner wall of the tower has a zigzag structure.

3. The wind turbine tower reinforcement structure according to claim 1, characterized in that, A vertical through-hole is provided on the connecting plate. Ear plates are connected to the lower part of the connecting plate extending outward from both sides of the through-hole. A connector is connected to the top of the reinforcing plate. The outer diameter of the connector is smaller than the distance between the two ear plates. Bolt holes are provided on the connector and the ear plates respectively, which are suitable for passing bolts through to lock and fix the connector and the ear plates.

4. The wind turbine tower reinforcement structure according to claim 3, characterized in that, The lower part of the connector and the top part of the connecting plate form an inverted L-shaped structure, which is suitable for the connector to be inserted between the two ear plates and then locked at the bottom of the opening.

5. The wind turbine tower reinforcement structure according to claim 1, characterized in that, The fixing block is fixed to the connecting plate by bolts. Its top end is recessed with a lower retaining groove corresponding to the position of the guide connecting ring, which is suitable for being locked in the lower part of the guide connecting ring so that the connecting plate can slide steadily along the circumference of the guide connecting ring.

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