A transmission tower inclined member reinforcing structure suitable for strong wind areas

Abstract

This utility model discloses a reinforcement structure for the inclined members of power transmission towers suitable for strong wind areas. It includes two main beams, each with two positioning screws installed on its inner wall. Adjacent positioning screws are arranged vertically. A rear rubber sleeve is movably fitted onto the rear side of each positioning screw, and a front rubber sleeve is movably fitted onto the front side. This utility model utilizes a bidirectional damper with a bidirectional energy dissipation mechanism. Through the bidirectional movement of the piston between the inner and outer cylinders, it can simultaneously dissipate the longitudinal and lateral vibration energy generated by the crossed inclined members under wind loads. Compared to unidirectional dampers, it is more adaptable to the multidirectional force characteristics of power transmission towers. The bidirectional damper can also suppress vortex-induced vibration, as the steel pipes of the crossed inclined members are prone to resonance caused by wind-induced vortices. The vibration damper dissipates vibration energy through its own structure, significantly reducing conductor amplitude and preventing fatigue fracture of the inclined members due to long-term micro-vibrations. The combination of these structures greatly improves the strength of the inclined members and extends their service life.

Description

Technical Field

[0001] This utility model relates to the field of power transmission tower technology, specifically a diagonal reinforcement structure for power transmission towers suitable for areas with strong winds. Background Technology

[0002] Transmission towers are the support points for overhead lines. A single-circuit transmission tower supports one circuit, while a double-circuit transmission tower supports two circuits. A single circuit means one load has one power supply; a double circuit means one load has two power supply circuits. Generally, enterprises with high power supply reliability requirements, or important substations in a region, use double-circuit power supply. This protects the system so that if one power source fails, the other can continue supplying power. However, small and medium-sized users with lower power supply reliability requirements often use single-power supply.

[0003] To improve the stability and strength of transmission towers, diagonal bracing is installed. However, existing diagonal bracing on transmission towers lacks vibration damping components after installation. Long-term continuous vibration of the diagonal bracing can easily lead to fatigue fracture, ultimately causing damage to the transmission tower. To address these technical problems, we have designed a diagonal bracing reinforcement structure for transmission towers suitable for areas with strong winds. Utility Model Content

[0004] The purpose of this utility model is to provide a reinforcement structure for the inclined members of power transmission towers suitable for areas with strong winds. It has the advantage of simultaneously consuming the longitudinal and lateral vibration energy generated by the intersecting inclined members under wind loads. It solves the problem that the inclined members of power transmission towers lack vibration elimination components after installation, and the long-term continuous vibration of the inclined members is prone to fatigue fracture, causing damage to the power transmission towers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a diagonal reinforcement structure for power transmission towers in areas with strong winds, comprising two main beams, each main beam having two positioning screws installed on its inner wall, with adjacent positioning screws arranged vertically, a rear rubber sleeve movably fitted on the rear side of the positioning screw, a front rubber sleeve movably fitted on the front side of the positioning screw, and a positioning nut 1 threaded on the front side of the positioning screw, with two diagonal members fitted on the outside of the four positioning screws and between the rear and front rubber sleeves, the diagonal members having an arc-shaped guide surface on their outer surface, mounting screw holes penetrating on both the left and right sides of the diagonal members, a shock-absorbing component 1 installed between the upper and lower mounting screw holes, and a mounting groove penetrating on the diagonal members, with a shock-absorbing component 2 installed inside the mounting groove.

[0006] Preferably, the rear side of the positioning nut is in close contact with the front side of the front rubber sleeve, and the front and rear sides of the inclined rod are in close contact with the rear side of the front rubber sleeve and the front side of the rear rubber sleeve, respectively.

[0007] Preferably, both ends of the inclined material are provided with mounting through holes for use with positioning screws. The two inclined materials are distributed in a cross pattern, with one inclined material located in front of the other inclined material. The intersection of the two inclined materials is connected. The longitudinal length of the two front rubber sleeves is greater than the longitudinal length of the other two front rubber sleeves.

[0008] Preferably, the shock-absorbing component one includes two mounting screws. The rear thread of the mounting screw passes through the mounting screw hole and is threaded with a positioning nut two. A washer is slidably sleeved on the outside of the mounting screw. The front side of the washer contacts the inclined plate, and the rear side of the washer contacts the positioning nut two.

[0009] Preferably, a limit block is connected to the front side of the mounting screw, and a bidirectional damper is sleeved on the front side of both mounting screws.

[0010] Preferably, the second shock-absorbing component includes an upper semi-circular ring and a lower semi-circular ring. The upper semi-circular ring is located inside the mounting groove, and the lower semi-circular ring is located below the mounting groove. The upper and lower semi-circular rings are connected by bolts. A connecting rod is connected to the bottom of the lower semi-circular ring, and a shock-absorbing hammer is connected to the side of the connecting rod away from the lower semi-circular ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention, through the combined use of damping component one, damping component two, mounting slots, and mounting screw holes, has the advantage of simultaneously consuming the longitudinal and lateral vibration energy generated by the cross-bracing under wind loads. Utilizing the bidirectional energy dissipation mechanism of the bidirectional damper, the piston's bidirectional movement between the inner and outer cylinders simultaneously consumes the longitudinal and lateral vibration energy generated by the cross-bracing under wind loads, making it more suitable for the multidirectional force characteristics of transmission towers compared to unidirectional dampers. The bidirectional damper also suppresses vortex-induced vibration, as the cross-bracing steel pipe is prone to resonance caused by wind-induced vortices. The vibration damper, through its own structure, consumes vibration energy, significantly reducing conductor amplitude and preventing fatigue fracture of the cross-bracing due to long-term micro-vibrations. The combination of these structures greatly improves the strength of the cross-bracing and extends its service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the oblique member structure of this utility model;

[0015] Figure 3 This utility model Figure 2 A partial top view;

[0016] Figure 4 This is a schematic diagram of the second structure of the shock-absorbing component of this utility model;

[0017] Figure 5 This is a structural schematic diagram of the shock-absorbing component of this utility model.

[0018] In the diagram: 1. Main beam; 2. Diagonal member; 3. Vibration damping component one; 31. Washer; 32. Mounting screw; 33. Bidirectional damper; 34. Positioning nut two; 35. Limiting block; 4. Vibration damping component two; 41. Vibration damper hammer; 42. Connecting rod; 43. Lower semi-circular ring; 44. Upper semi-circular ring; 5. Positioning screw; 6. Positioning nut one; 7. Front rubber sleeve; 8. Mounting slot; 9. Arc-shaped guide surface; 10. Rear rubber sleeve; 11. Mounting through hole; 12. Mounting screw hole. Detailed Implementation

[0019] Please see Figures 1-5 A diagonal reinforcement structure for power transmission towers suitable for strong wind areas includes two main beams 1. Two positioning screws 5 are installed on the inner walls of each main beam 1, with adjacent positioning screws 5 arranged vertically. A rear rubber sleeve 10 is movably fitted on the rear side of the positioning screw 5, and a front rubber sleeve 7 is movably fitted on the front side of the positioning screw 5. A positioning nut 6 is threaded on the front side of the positioning screw 5. Two diagonal members 2 are fitted on the outside of the four positioning screws 5, located between the rear rubber sleeve 10 and the front rubber sleeve 7. An arc-shaped guide surface 9 is provided on the outside of the diagonal members 2. Mounting screw holes 12 are provided through the left and right sides of the diagonal members 2. A shock-absorbing component 3 is installed between the upper and lower mounting screw holes 12. An mounting slot 8 is provided through the diagonal members 2, and a second shock-absorbing component 4 is installed inside the mounting slot 8. The arc-shaped guide surface 9 mainly achieves the following core advantages by improving the airflow pattern: reducing wind load and structural stress; suppressing vortex separation: the arc-shaped guide surface 9 can guide the airflow to transition smoothly, reduce the alternating vortices (Karman vortex street) generated on the leeward side of the inclined member 2, reduce wind-induced vibration energy and weaken the peak dynamic stress of the tower; reducing drag coefficient: compared with the traditional rectangular section, the arc-shaped surface can reduce the aerodynamic drag of the inclined member 2, directly reduce the horizontal wind load borne by the tower, and optimize the economic efficiency of foundation design.

[0020] Improve vibration resistance: Reduce wind vibration: By disrupting the periodic shedding frequency of airflow (3-120Hz), the wind vibration of the inclined member 2 is significantly suppressed, avoiding metal fatigue cracks caused by long-term micro-vibration; Alleviate secondary span oscillation: In strong wind areas, the risk of coupling vibration between the inclined member 2 and the conductor can be reduced, and component collisions or hardware wear caused by excessive amplitude can be reduced.

[0021] Enhanced adaptability to extreme climates: Typhoon-resistant design: The arc-shaped guide surface 9 reduces turbulence intensity during typhoon passage, suppresses nonlinear wind vibration (such as galloping), and reduces the probability of instability of long-span high towers; Anti-icing and wind coupling effects: Ice accumulation degrades the aerodynamic performance of components, while the streamlined surface delays the surge in drag caused by icing and maintains structural stability.

[0022] The rear side of the positioning nut 6 is in close contact with the front side of the front rubber sleeve 7, and the front and rear sides of the inclined rod 2 are in close contact with the rear side of the front rubber sleeve 7 and the front side of the rear rubber sleeve 10, respectively. By using the cooperation of the front rubber sleeve 7 and the rear rubber sleeve 10, the inclined rod 2 can be clamped and restrained. By using the positioning nut 6, the front rubber sleeve 7 and the inclined rod 2 can be positioned.

[0023] Both ends of the diagonal member 2 are provided with mounting through holes 11 for use with the positioning screw 5. The two diagonal members 2 are distributed in a cross pattern, with one diagonal member 2 located in front of the other diagonal member 2. The intersection of the two diagonal members 2 is connected. The longitudinal length of the two front rubber sleeves 7 is greater than the longitudinal length of the other two front rubber sleeves 7. The mounting through holes 11 facilitate the fitting of the diagonal member 2 onto the outside of the positioning screw 5. The poor connection between the two diagonal members 2 is fixed by welding.

[0024] The shock-absorbing component 3 includes two mounting screws 32. The rear thread of the mounting screw 32 passes through the mounting screw hole 12 and is threaded with a positioning nut 34. A washer 31 is slidably fitted on the outside of the mounting screw 32. The front side of the washer 31 contacts the inclined member 2, and the rear side of the washer 31 contacts the positioning nut 34. The mounting screw 32 can be positioned and installed by the positioning nut 34.

[0025] The front side of the mounting screw 32 is connected to a limiting block 35, and the front sides of the two mounting screws 32 are jointly fitted with a bidirectional damper 33. The limiting block 35 can limit the bidirectional damper 33 to prevent it from detaching from the mounting screw 32. The threads on the outside of the mounting screw 32 are opened on the front side of the diagonal member 2. The bidirectional damper 33 has a bidirectional energy dissipation mechanism. Through the bidirectional movement of the piston between the inner and outer cylinders (compression and rebound stroke), it can simultaneously dissipate the longitudinal and lateral vibration energy generated by the cross diagonal members under wind load. Compared with unidirectional dampers, it is more suitable for the multidirectional force characteristics of transmission towers. The bidirectional damper 33 can also suppress vortex-induced vibration. The cross diagonal steel pipe is prone to resonance (frequency 3-30Hz) caused by wind-induced vortices. The bidirectional damper 33 interferes with the natural vibration frequency through damping forces with opposite phases, reducing the amplitude by more than 40% and reducing the risk of fatigue damage to the steel pipe joints.

[0026] The second vibration damping component 4 includes an upper semi-circular ring 44 and a lower semi-circular ring 43. The upper semi-circular ring 44 is located inside the mounting slot 8, and the lower semi-circular ring 43 is located below the mounting slot 8. The upper semi-circular ring 44 and the lower semi-circular ring 43 are connected by bolts. A connecting rod 42 is connected to the bottom of the lower semi-circular ring 43, and a vibration damper 41 is connected to the side of the connecting rod 42 away from the lower semi-circular ring 43. The mounting slot 8 facilitates the splicing and installation of the upper semi-circular ring 44 and the lower semi-circular ring 43. The vibration damper 41 consumes vibration energy through its own structure, significantly reducing the amplitude of the conductor and avoiding fatigue fracture of the inclined member 2 caused by long-term micro-vibration.

[0027] In use, the shock-absorbing component 3 and the bidirectional damper 33, with their bidirectional energy dissipation mechanism, utilize the bidirectional movement of the piston between the inner and outer cylinders to simultaneously dissipate the longitudinal and lateral vibration energy generated by the cross-bracing under wind loads. Compared to unidirectional dampers, this is more suitable for the multidirectional force characteristics of transmission towers. The bidirectional damper 33 can also suppress vortex-induced vibration, as the cross-bracing steel pipe is prone to resonance caused by wind-induced vortices. The vibration damper 41 dissipates vibration energy through its own structure, significantly reducing conductor amplitude and preventing fatigue fracture of the cross-bracing 2 caused by long-term micro-vibrations.

[0028] In summary, this reinforcement structure for inclined members of power transmission towers, suitable for areas with strong winds, solves the problem of insufficient vibration damping components after installation of inclined members of power transmission towers. This is achieved through the coordinated use of vibration damping component 1 (3), vibration damping component 2 (4), mounting slot 8, and mounting screw hole 12. The long-term continuous vibration of the inclined members can easily lead to fatigue fracture and damage to the power transmission tower.

Claims

1. A diagonal bracing structure for power transmission towers suitable for areas with strong winds, comprising two main beams (1), characterized in that: Two positioning screws (5) are installed on the inner walls of the two main beams (1). The two adjacent positioning screws (5) are distributed vertically. The rear side of the positioning screw (5) is movably fitted with a rear rubber sleeve (10). The front side of the positioning screw (5) is movably fitted with a front rubber sleeve (7). The front thread of the positioning screw (5) is fitted with a positioning nut (6). Two inclined rods (2) are fitted on the outside of the four positioning screws (5) and between the rear rubber sleeve (10) and the front rubber sleeve (7). An arc-shaped guide surface (9) is opened on the outside of the inclined rod (2). The left and right sides of the inclined rod (2) are both through-holes (12). The upper and lower two mounting screw holes (12) are together installed with a shock-absorbing component (3). An installation slot (8) is opened through the inclined rod (2). The inside of the installation slot (8) is installed with a shock-absorbing component (4).

2. The inclined reinforcement structure for power transmission towers in areas with strong winds, as described in claim 1, is characterized in that: The rear side of the positioning nut (6) is in close contact with the front side of the front rubber sleeve (7), and the front and rear sides of the inclined rod (2) are in close contact with the rear side of the front rubber sleeve (7) and the front side of the rear rubber sleeve (10), respectively.

3. The inclined reinforcement structure for power transmission towers in areas with strong winds, as described in claim 1, is characterized in that: Both ends of the inclined material (2) are provided with mounting through holes (11) for use with positioning screws (5). The two inclined materials (2) are distributed in a cross pattern, with one inclined material (2) located in front of the other inclined material (2). The intersection of the two inclined materials (2) is connected. The longitudinal length of the two front rubber sleeves (7) is greater than the longitudinal length of the other two front rubber sleeves (7).

4. The inclined reinforcement structure for power transmission towers in areas with strong winds, as described in claim 1, is characterized in that: The shock-absorbing component 1 (3) includes two mounting screws (32). The rear thread of the mounting screw (32) passes through the mounting screw hole (12) and is threaded with the positioning nut 2 (34). The outer side of the mounting screw (32) is slidably fitted with a washer (31). The front side of the washer (31) is in contact with the inclined plate (2), and the rear side of the washer (31) is in contact with the positioning nut 2 (34).

5. The inclined reinforcement structure for power transmission towers in areas with strong winds, as described in claim 4, is characterized in that: The front side of the mounting screw (32) is connected to a limit block (35), and the front side of the two mounting screws (32) is fitted with a bidirectional damper (33).

6. The inclined reinforcement structure for power transmission towers in areas with strong winds, as described in claim 1, is characterized in that: The second shock absorber (4) includes an upper semi-circular ring (44) and a lower semi-circular ring (43). The upper semi-circular ring (44) is located inside the mounting slot (8), and the lower semi-circular ring (43) is located below the mounting slot (8). The upper semi-circular ring (44) and the lower semi-circular ring (43) are connected by bolts. A connecting rod (42) is connected to the bottom of the lower semi-circular ring (43), and a shock absorber (41) is connected to the side of the connecting rod (42) away from the lower semi-circular ring (43).

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