A stress buffering device for a long-span power transmission tower

Abstract

The present application relates to the technical field of power transmission towers, and discloses a large-span power transmission tower stress buffering device, which comprises a tower base and a tower arranged above the tower base, and further comprises a base, which is bolted at the corners of the four sides of the tower base; a flange plate, which is fixed below the base; a buffering piece, which is slidingly arranged in the base; a butt joint plate, which is bolted at the corners of the four sides of the tower base; and a wind adjusting piece, which is fixed on the tower base; the greater the wind strength of the external environment, the stronger the airflow impact force borne by the wing plate, the vibration frequency and the flutter amplitude of the wing plate are synchronously increased, the reciprocating torsional vibration amplitude of the torsional shaft is increased accordingly, the second liquid piston is driven to adjust its displacement, the opening of the adjusting hole is blocked to different degrees, the operation damping is automatically increased with the wind strength, the wind-induced resonance phenomenon of the tower caused by strong wind is effectively inhibited, the alternating dynamic stress continuously generated by the tower body member and the connecting node is reduced, and the overall structural stability of the tower under the condition of strong wind is improved.

Description

Technical Field

[0001] This invention relates to the field of power transmission tower technology, and specifically to a stress buffering device for long-span power transmission towers. Background Technology

[0002] Long-span transmission towers are widely used in long-distance transmission line deployments in the field. The airflow environment in these areas is complex, with frequent occurrences of gusts, strong convective winds, and irregular turbulence. Wind load is a major external factor affecting the operational safety of transmission towers. Currently, most long-span transmission towers are equipped with bases and hydraulic buffer structures at their bottom. In windless conditions, the transmission tower only bears its own weight and the line load, and is in a static stress state. The traditional base only serves as a basic support, which can basically meet the requirements for static load-bearing of the tower.

[0003] When wind forces act, transmission towers transition from a static to a dynamic stress state, with airflow impacts causing the tower to sway back and forth continuously. Currently, commercially available hydraulic damping bases at the base of transmission towers generally employ a fixed-value damping design, meaning the hydraulic resistance is a fixed parameter and cannot be dynamically adjusted to change with the magnitude of the wind, resulting in significant limitations. In low wind conditions, the fixed hydraulic resistance is too high, hindering the movement of the damping structure and making it difficult to quickly dissipate small swaying of the tower. In strong winds, the existing hydraulic resistance is insufficient to match the impact load, failing to effectively restrain large-scale tower swaying.

[0004] As transmission towers sway continuously under wind force, their various members and connection points repeatedly bear alternating loads, generating alternating dynamic stresses. Existing buffer structures lack adaptive adjustment capabilities and cannot synchronously adjust buffer resistance according to real-time wind conditions, making it difficult to adaptively reduce alternating dynamic stresses. Under prolonged alternating stress, tower members are prone to plastic deformation, and connection points gradually loosen and suffer fatigue damage. This not only significantly shortens the overall service life of the transmission tower but also introduces safety hazards such as line tripping and tower instability.

[0005] Meanwhile, wind directions in the field are complex and changeable, with frequent gusts and turbulence. The buffer structure with fixed hydraulic resistance has poor adaptability to complex wind conditions and cannot effectively suppress wind-induced resonance. Existing tower bottom buffer devices have limited functionality, only achieving foundation vibration reduction. They cannot adapt to changes in wind conditions to achieve damping self-adjustment, and therefore cannot fundamentally reduce the alternating dynamic stress of the tower structure. This makes it difficult to meet the protection requirements of long-span transmission towers for long-term stable operation in complex field environments. Summary of the Invention

[0006] This invention provides a stress buffer device for long-span transmission towers, which effectively suppresses wind-induced resonance in towers caused by strong winds and reduces the alternating dynamic stress continuously generated between tower members and connection nodes.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A stress buffer device for long-span transmission towers includes: a tower base and a tower installed above the tower base, and further includes: The base is bolted to the corners on all four sides of the tower base; the flange plate is fixed below the base; the buffer is slidably installed inside the base; the connecting plate is bolted to the corners on all four sides of the tower base; and the air conditioning component is fixed to the tower base. The air conditioning component includes: a dust sealing box fixed to the tower base; a mounting base fixed inside the dust sealing box; a torsion shaft rotatably mounted on the dust sealing box; a wing plate fixed above the torsion shaft, with an asymmetrical airfoil cross-section; a sliding rod slidably inserted into the dust sealing box, with one end inside the dust sealing box slidably inserted above the mounting base; a drive base fixed to the end of the sliding rod inside the dust sealing box; a drive gear plate fixed below the drive base; a support shaft fixed to the mounting base; a drive plate rotatably mounted on the support shaft; and a first gear assembly fixed... Above the drive plate, and meshing with the drive gear plate; the second gear set, fixed below the drive plate; the stroke rod, both ends fixed to the mounting base; the gear plate, slidably sleeved on the stroke rod, with its upper teeth meshing with the second gear set; the rotating shaft, rotatably mounted on the mounting base and located below the gear plate; the drive gear, fixed on the rotating shaft and meshing with the lower teeth of the gear plate; the drive cylinder, fixed to the mounting base; the threaded rod, threaded into the drive cylinder; the hexagonal shaft, one end fixed to the rotating shaft, the other end slidably inserted into... The following components are included: a threaded rod; an isolation plate fixed inside the drive cylinder; a drive piston slidably disposed inside the drive cylinder; a drive spring, one end fixed to the inner wall of the drive cylinder and the other end fixed to the drive piston; a first conical groove formed on the isolation plate; an opening / closing groove formed on the side of the isolation plate away from the first conical groove and connected to the first conical groove; a flow-limiting plate located inside the opening / closing groove; a second conical groove formed on the flow-limiting plate; a flow-limiting orifice formed on the side of the flow-limiting plate away from the second conical groove and connected to the second conical groove; and a guide groove. Within the opening and closing groove; a guide rod, one end of which is slidably disposed within the guide groove, and the other end fixed to the flow limiting plate; a guide spring, one end of which is fixed to the guide rod, and the other end fixed within the guide groove; a first liquid chamber, located within the base; a first liquid piston, slidably disposed within the first liquid chamber; a second liquid chamber, located within the base; a second liquid piston, slidably disposed within the second liquid chamber; a linkage rod, one end of which is fixed to the first liquid piston, and the other end of which is fixed to the second liquid piston; and an adjustment hole, located within the base and connected to the second liquid chamber.

[0008] Furthermore, the air conditioning component also includes: A hexagonal groove is formed inside the threaded rod; a hexagonal slide column is slidably disposed in the hexagonal groove and fixed to the end of the hexagonal shaft located inside the threaded rod; a limiting collar is fixed to the end of the threaded rod located inside the drive cylinder; and a limiting ring is fixed inside the second liquid chamber.

[0009] Furthermore, the air conditioning component also includes: The first liquid guide tube is fixed at one end to the drive cylinder and extends out of the dust sealing box at the other end; the second liquid guide tube is fixedly inserted into the base, and one end of the second liquid guide tube extends into the first liquid chamber; the liquid collection box is fixed in the tower base; the first liquid pipe is fixed at one end to the first liquid guide tube and at the other end to the liquid collection box; the second liquid pipe is fixed at one end to the second liquid guide tube and at the other end to the liquid collection box.

[0010] Furthermore, the air conditioning component also includes: A sleeve is rotatably fitted onto a torsion shaft; a ball head is movably embedded in the sleeve; a first rotating seat is fixed to the ball head; a second rotating seat is fixed to the end of the slide rod away from the dust box; and a swing plate is rotatably mounted on the first rotating seat at one end and on the second rotating seat at the other end.

[0011] Furthermore, the air conditioning component also includes: A bushing is fixed to the dust box and fitted under the torsion shaft; a spring seat is fixed to one end of the torsion shaft extending into the dust box; a torsion spring is fitted onto the torsion shaft, with one end fixed to the bottom of the dust box and the other end fixed to the spring seat.

[0012] Furthermore, the torsion shaft is located at one-quarter of the front end of the wingplate.

[0013] Furthermore, the buffer includes: The first hydraulic chamber is located inside the base; the second hydraulic chamber is located inside the base and is connected to the adjustment hole; the hydraulic hole is located inside the base and is connected to both the first and second hydraulic chambers.

[0014] Furthermore, the buffer also includes: The main piston is slidably disposed in the first hydraulic chamber; the piston rod is fixed at one end to the main piston and extends out of the base at the other end; the flange is fixed to the end of the piston rod that extends out of the base and is bolted to the bottom of the mating plate.

[0015] Furthermore, the buffer also includes: The main spring is fixed at one end to the bottom of the first hydraulic chamber and at the other end to the main piston; the limiting post is fixed at the bottom of the first hydraulic chamber; the auxiliary piston is slidably disposed in the second hydraulic chamber; and the auxiliary spring is fixed at one end to the top of the second hydraulic chamber and at the other end to the auxiliary piston.

[0016] Furthermore, the buffer also includes: A sealing groove is formed inside the base; a sealing ring is embedded in the sealing groove and fitted onto the piston rod; a limiting auxiliary ring is fixed inside the second hydraulic chamber and located below the auxiliary piston.

[0017] The above-described solution of the present invention has at least the following beneficial effects: The present invention utilizes the principle that the greater the wind strength in the external environment, the stronger the airflow impact on the wingplate, resulting in a synchronous increase in the flutter amplitude and vibration frequency of the wingplate. This leads to a corresponding increase in the amplitude of the reciprocating torsional vibration of the torsion shaft, thereby increasing the travel distance of the sliding rod's reciprocating linear motion. With the increased sliding rod travel, the drive gear plate synchronously drives the drive plate to increase its swing amplitude around the support shaft, thereby causing the drive gear, rotating shaft, hexagonal shaft, and threaded rod to rotate. The threaded rod, through its screwing-in or screwing-out action, coordinates with the drive piston movement, pushing the hydraulic oil inside the drive cylinder, which in turn pushes the first hydraulic piston and the linkage rod to move, causing the second... The two-hydraulic piston, based on its own displacement distance, creates varying degrees of sealing effect on the opening of the adjustment hole. The sealing area of ​​the second hydraulic piston on the adjustment hole opening can be adjusted according to the real-time wind force, precisely controlling the flow rate of hydraulic oil from the first hydraulic chamber to the second hydraulic chamber. The stronger the wind, the greater the resistance generated by the hydraulic oil flow. The device's operating damping automatically increases with wind intensity, effectively suppressing wind-induced resonance in the tower caused by strong winds, significantly reducing the tower's sway amplitude, reducing the continuous alternating stress generated by the tower members and connection nodes, and significantly improving the overall structural stability of the tower under strong wind conditions.

[0018] This invention utilizes the reciprocating torsion stroke of the torsion shaft, during which the threaded rod completes a full cycle of screwing in and out. When the threaded rod screws out of the drive cylinder, the flow-limiting plate re-embeds into the opening and closing groove, restoring the structure to a closed flow-limiting state. At this time, the hydraulic oil between the first guide pipe and the isolation plate slowly permeates into the cavity between the isolation plate and the drive piston through the flow-limiting hole. The flow-limiting effect of the flow-limiting hole significantly reduces the hydraulic oil return rate and slows down the reset speed of the drive piston. The flow-limiting delay effect of the hydraulic oil can separate the screwed rod's screwing out motion from the drive piston's reset motion in a sequential manner, effectively avoiding structural transmission interference problems. As the external wind intensity gradually increases, the threaded rod screws into the drive cylinder in a progressive manner, continuously pushing the drive piston to squeeze out hydraulic oil, and the device damping gradually increases. As the external wind intensity gradually decreases, the threaded rod screws out of the drive cylinder in a progressive manner, the reset distance of the drive piston gradually increases, and the device damping decreases synchronously, thereby achieving an adaptive buffer adjustment function under all wind conditions. Attached Figure Description

[0019] Figure 1 A schematic diagram of the tower base structure of a stress buffer device for a long-span power transmission tower provided in an embodiment of the present invention; Figure 2A schematic diagram of the overall structure of a stress buffer device for a long-span transmission tower provided in an embodiment of the present invention; Figure 3 A schematic diagram of the liquid collection box structure of a stress buffer device for a long-span transmission tower provided in an embodiment of the present invention; Figure 4 A schematic diagram of the docking plate structure of a stress buffer device for a long-span transmission tower provided in an embodiment of the present invention; Figure 5 A cross-sectional view of the base of a stress buffer device for a long-span transmission tower provided in an embodiment of the present invention; Figure 6 A stress buffer device for long-span transmission towers provided in this embodiment of the invention. Figure 5 Enlarged view of point A; Figure 7 A schematic diagram of the wing plate structure of a stress buffer device for a long-span transmission tower provided in an embodiment of the present invention; Figure 8 A stress buffer device for long-span transmission towers provided in this embodiment of the invention. Figure 7 Enlarged view of point B; Figure 9 A stress buffer device for long-span transmission towers provided in this embodiment of the invention. Figure 7 Enlarged view of point C; Figure 10 A stress buffer device for long-span transmission towers provided in this embodiment of the invention. Figure 7 Enlarged view of point D; Figure 11 A stress buffer device for long-span transmission towers provided in this embodiment of the invention. Figure 7 Enlarged view of point E; Figure 12 A schematic diagram of the drive plate structure of a stress buffer device for a long-span transmission tower provided in an embodiment of the present invention; Figure 13 A stress buffer device for long-span transmission towers provided in this embodiment of the invention. Figure 12 Enlarged view at point F; Figure 14 A stress buffer device for long-span transmission towers provided in this embodiment of the invention. Figure 12 Enlarged view of point G.

[0020] Explanation of reference numerals in the attached figures: In the diagram: 1. Tower base; 2. Iron tower; 3. Base; 4. Flange plate; 5. Buffer component; 501. First hydraulic chamber; 502. Second hydraulic chamber; 503. Hydraulic hole; 504. Main piston; 505. Piston rod; 506. Flange; 507. Main spring; 508. Limiting post; 509. Auxiliary piston; 5010. Auxiliary spring; 5011. Sealing groove; 5012. Sealing ring; 5013. Limiting auxiliary ring; 6. Connecting plate; 7. Air conditioning component; 70 1. Dustproof box; 702. Mounting base; 703. Torsion shaft; 704. Wing plate; 705. Slide rod; 706. Drive base; 707. Drive gear plate; 708. Support shaft; 709. Drive plate; 7010. First gear set; 7011. Second gear set; 7012. Stroke rod; 7013. Alignment gear plate; 7014. Rotating shaft; 7015. Drive gear; 7016. Drive cylinder; 7017. Threaded rod; 7018. Hexagonal shaft; 7019. Partition 7020, Drive piston; 7021, Drive spring; 7022, First conical groove; 7023, Opening and closing groove; 7024, Flow limiting plate; 7025, Second conical groove; 7026, Flow limiting hole; 7027, Guide groove; 7028, Guide rod; 7029, Guide spring; 7030, First liquid chamber; 7031, First liquid piston; 7032, Second liquid chamber; 7033, Second liquid piston; 7034, Linkage rod; 7035, Adjustment hole; 7036, Hexagonal slide groove; 7037, Hexagonal slide column; 7038, Limiting collar; 7039, Limiting ring; 7040, First liquid guide tube; 7041, Second liquid guide tube; 7042, Liquid collection box; 7043, First liquid pipe; 7044, Second liquid pipe; 7045, Sleeve seat; 7046, Ball head; 7047, First rotary seat; 7048, Second rotary seat; 7049, Swing plate; 7050, Bushing; 7051, Spring seat; 7052, Torsion spring. Detailed Implementation

[0021] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0022] like Figures 1 to 14 As shown, an embodiment of the present invention provides a stress buffer device for a long-span transmission tower, comprising: a tower base 1 and a tower 2 disposed above the tower base 1, and further comprising: a base 3, bolted to the corners on the four sides of the tower base 1; a flange plate 4, fixed below the base 3; a buffer 5, slidably disposed within the base 3; a connecting plate 6, bolted to the corners on the four sides of the tower base 1; and an air conditioning component 7, fixed to the tower base 1.

[0023] Specifically, the tower base 1 is made of cement casting, which has high strength and high stability as a foundation support, and can provide a stable installation and bearing foundation for the entire device and the iron tower 2.

[0024] In another preferred embodiment of the present invention, the air conditioning component 7 includes: a dust sealing box 701, fixed on the tower base 1; a mounting base 702, fixed inside the dust sealing box 701; a torsion shaft 703, rotatably mounted on the dust sealing box 701; a wing plate 704, fixed above the torsion shaft 703, with an asymmetrical airfoil cross-section; a slide rod 705, slidably inserted into the dust sealing box 701, with one end inside the dust sealing box 701 slidably inserted above the mounting base 702; a drive base 706, fixed to one end of the slide rod 705 inside the dust sealing box 701; a drive gear plate 707, fixed below the drive base 706; a support shaft 708, fixed on the mounting base 702; a drive plate 709, rotatably mounted on the support shaft 708; and a first gear set 7010, fixed to the drive base 702. Above the moving plate 709, and meshing with the drive gear plate 707; the second gear set 7011 is fixed below the drive plate 709; the stroke rod 7012 is fixed at both ends to the mounting base 702; the opposing gear plate 7013 is slidably sleeved on the stroke rod 7012, and its upper teeth mesh with the second gear set 7011; the rotating shaft 7014 is rotatably mounted on the mounting base 702 and located below the opposing gear plate 7013; the drive gear 7015 is fixed on the rotating shaft 7014 and meshes with the lower teeth of the opposing gear plate 7013; the drive cylinder 7016 is fixed on the mounting base 702; the threaded rod 7017 is threaded into the drive cylinder 7016; the hexagonal shaft 7018 is fixed at one end to the rotating shaft 7014 and slidably inserted into the threaded rod at the other end. 7017; an isolation plate 7019, fixed inside the drive cylinder 7016; a drive piston 7020, slidably disposed inside the drive cylinder 7016; a drive spring 7021, one end fixed to the inner wall of the drive cylinder 7016, and the other end fixed to the drive piston 7020; a first conical groove 7022, formed on the isolation plate 7019; an opening / closing groove 7023, formed on the side of the isolation plate 7019 away from the first conical groove 7022, and connected to the first conical groove 7022; a flow-limiting plate 7024, located inside the opening / closing groove 7023; a second conical groove 7025, formed on the flow-limiting plate 7024; a flow-limiting hole 7026, formed on the side of the flow-limiting plate 7024 away from the second conical groove 7025, and connected to the second conical groove 7025; a guide groove 7. 027, located within the opening / closing groove 7023; guide rod 7028, one end slidably disposed within the guide groove 7027, the other end fixed to the flow limiting plate 7024; guide spring 7029, one end fixed to the guide rod 7028, the other end fixed within the guide groove 7027; first liquid chamber 7030, located within the base 3; first liquid piston 7031, slidably disposed within the first liquid chamber 7030; second liquid chamber 7032, located within the base 3; second liquid piston 7033, slidably disposed within the second liquid chamber 7032; linkage rod 7034, one end fixed to the first liquid piston 7031, the other end fixed to the second liquid piston 7033; adjustment hole 7035, located within the base 3 and connected to the second liquid chamber 7032.

[0025] The air conditioning component 7 also includes: a hexagonal slide groove 7036, formed within the threaded rod 7017; a hexagonal slide column 7037, slidably disposed within the hexagonal slide groove 7036 and fixed to one end of the hexagonal shaft 7018 located within the threaded rod 7017; a limiting collar 7038, fixed to one end of the threaded rod 7017 located within the drive cylinder 7016; a limiting ring 7039, fixed within the second liquid chamber 7032; and a first liquid guide tube 7040, one end of which is fixed to the drive cylinder 7016. 16. The other end extends out of the dust sealing box 701; the second liquid guide tube 7041 is fixedly inserted into the base 3, and one end of the base 3 extends into the first liquid chamber 7030; the liquid collection box 7042 is fixed in the tower base 1; the first liquid tube 7043 has one end fixed to the first liquid guide tube 7040 and the other end fixed to the liquid collection box 7042; the second liquid tube 7044 has one end fixed to the second liquid guide tube 7041 and the other end fixed to the liquid collection box 7042.

[0026] The air conditioning component 7 also includes: a sleeve 7045, rotatably sleeved on the torsion shaft 703; a ball head 7046, movably embedded in the sleeve 7045; a first rotating seat 7047, fixed on the ball head 7046; a second rotating seat 7048, fixed on the end of the slide rod 705 away from the dust box 701; a swing plate 7049, one end rotatably mounted on the first rotating seat 7047, and the other end rotatably mounted on the second rotating seat 7048; a bushing 7050, fixed on the dust box 701 and sleeved below the torsion shaft 703; a spring seat 7051, fixed on the end of the torsion shaft 703 extending into the dust box 701; and a torsion spring 7052, sleeved on the torsion shaft 703, one end fixed to the bottom of the dust box 701, and the other end fixed to the spring seat 7051.

[0027] The torsion shaft 703 is located one-quarter of the way from the front end of the airfoil 704.

[0028] Specifically, the sleeve 7045, ball head 7046, first rotating seat 7047, swing plate 7049, and second rotating seat 7048 form an adaptive angle transmission structure, which can accurately adapt to the angle changes of the reciprocating torsional vibration of the torsion shaft 703, eliminate transmission jamming and structural interference, and ensure the continuity of power transmission; the spring seat 7051 and torsion spring 7052 are used to adapt to the reciprocating torsion of the torsion shaft 703, realize the stable switching of the vibration cycle of the torsion shaft 703, and ensure that the air conditioning component 7 continuously adapts to changes in wind force.

[0029] In another preferred embodiment of the present invention, the buffer 5 includes: a first hydraulic chamber 501, which is formed in the base 3; a second hydraulic chamber 502, which is formed in the base 3 and communicates with the adjustment hole 7035; a hydraulic hole 503, which is formed in the base 3 and communicates with the first hydraulic chamber 501 and the second hydraulic chamber 7032; a main piston 504, which is slidably disposed in the first hydraulic chamber 501; a piston rod 505, one end of which is fixed to the main piston 504 and the other end of which extends out of the base 3; and a flange 506, which is fixed to the end of the piston rod 505 that extends out of the base 3 and is bolted to the bottom of the docking plate 6.

[0030] The buffer component 5 also includes: a main spring 507, one end of which is fixed to the bottom of the first hydraulic chamber 501 and the other end of which is fixed to the main piston 504; a limiting post 508, which is fixed to the bottom of the first hydraulic chamber 501; an auxiliary piston 509, which is slidably disposed in the second hydraulic chamber 502; an auxiliary spring 5010, one end of which is fixed to the top of the second hydraulic chamber 502 and the other end of which is fixed to the auxiliary piston 509; a sealing groove 5011, which is formed in the base 3; a sealing ring 5012, which is embedded in the sealing groove 5011 and sleeved on the piston rod 505; and a limiting auxiliary ring 5013, which is fixed in the second hydraulic chamber 502 and located below the auxiliary piston 509.

[0031] Specifically, flange 506 enables a stable connection and fixation between piston rod 505 and docking plate 6, stably transmitting the swaying stress and wind impact load generated during the operation of tower 2 to main piston 504, achieving precise force transmission. Main piston 504 can slide vertically inside the first hydraulic chamber 501, and with the elastic extension and contraction characteristics of main spring 507, it completes primary vibration energy absorption and structural reset, weakening the high-frequency swaying impact of tower 2. Hydraulic hole 503 can connect the first hydraulic chamber 501 and the second hydraulic chamber 7032, and with adjustment hole 7035, it enables the adaptive flow of hydraulic oil to adjust the internal hydraulic pressure. The auxiliary piston 509 and auxiliary spring 5010 inside the second hydraulic chamber 502 form a secondary buffer structure, which can perform secondary energy absorption and shock absorption on the impact pressure transmitted by hydraulic pressure, greatly improving the overall stress buffering effect of the device and effectively suppressing the wind-induced swaying and stress concentration problems of tower 2.

[0032] Strong winds can severely impact long-span transmission towers, causing safety hazards such as tower swaying, stress concentration, and resonance deformation, directly affecting the operational stability of the transmission towers. This device incorporates eight sets of torsion shafts 703 and wing plates 704 within the wind control component 7. The eight wing plates 704 are arranged in eight different directions, adapting to the complex and ever-changing wind environment in the field. The number of wing plates 704 can also be increased or decreased according to the complexity of the wind direction in the area. The wing plates 704 adopt an asymmetric airfoil structure. When the airflow contacts the surface of the wing plates 704, it can induce continuous flutter motion, converting natural wind energy into mechanical kinetic energy, providing continuous power input for the adaptive buffering and adjustment operation of this device.

[0033] The airflow directly impacts the leading edge of the airfoil 704, rapidly forming airflow separation and air vortices, causing the airfoil 704 to produce large-amplitude, high-frequency flutter. This drives the corresponding torsion shaft 703 to perform a long-stroke reciprocating torsion, providing the main power for the wind-adjusting component 7. The six lateral airfoils 704 are located in the oblique windward area, where the oblique airflow creates a pressure difference between the upper and lower surfaces of the airfoil 704, also inducing flutter. Due to the inclined airflow injection angle, the airflow separation effect is weaker than in the directly windward area, and the corresponding torsion shaft 703 produces a small-amplitude reciprocating torsion, continuously outputting power as a supplement. The airfoil 704 in the leeward area is not directly impacted by the dominant airflow, but there is a large low-pressure wake area behind the tower 2. The low-pressure wake area is accompanied by backflow, disordered vortices, and airflow pulsations, which act in the opposite direction on the airfoil surface. The asymmetric airfoil will produce micro-flutter when excited by the reverse airflow, but the effect of micro-flutter can be disregarded as a supplement to the output power.

[0034] When the natural environment is windless, tower 2 only bears static forces. The load is stably transferred to the connecting plate 6 at the tower base 1 and the buffer 5 inside the base 3. The overall structure remains in a static and stable state, which can meet the daily static load-bearing and foundation protection requirements of the transmission tower. When the natural environment generates wind, tower 2 switches to a dynamic load-bearing state. The structural load of tower 2 itself is superimposed with the impact load of strong winds, which will break the force balance of the tower body and cause tower 2 to sway continuously. Long-term repeated swaying will cause fatigue damage to the tower structure and threaten the safety of power transmission.

[0035] In windy conditions, the leading edge of the airfoil 704 on the windward side is directly impacted by the airflow. When the airflow passes through the asymmetric airfoil 704, it will generate violent airflow separation and air vortex, stably triggering the structural flutter condition, causing the airfoil 704 to continuously flutter at high frequency, thereby driving the torsion shaft 703 to perform reciprocating torsional vibration. During the reciprocating torsion of the torsion shaft 703, it drives the sleeve 7045 sleeved on the outside of the shaft to move synchronously. The ball head 7046 inside the sleeve 7045 adaptively adjusts the angle, causing the first rotating seat 7047 fixed to the ball head 7046 to swing. The first rotating seat 7047 is linked to the second rotating seat 7048 to move synchronously through the swing plate 7049. The second rotating seat 7048 drives the slide rod 705 to perform a stable reciprocating linear sliding motion along the top of the dust box 701 and the mounting seat 702.

[0036] During the reciprocating linear motion of the slide bar 705, it drives the drive seat 706 fixed at the end and the drive gear plate 707 to move synchronously. The drive gear plate 707 meshes with the first gear set 7010 above the drive plate 709 through its own teeth, causing the drive plate 709 to reciprocate and swing about the support shaft 708 fixed by the mounting seat 702 as the axis. During the swinging motion of the drive plate 709, it meshes with the teeth above the counter gear plate 7013 through the second gear set 7011 below, causing the counter gear plate 7013 to slide horizontally along the stroke rod 7012. The bottom teeth of the toothed plate 7013 mesh with the drive gear 7015 of the rotating shaft 7014, causing the drive gear 7015 to rotate alternately in the forward and reverse directions. The drive gear 7015 drives the rotating shaft 7014 to rotate synchronously, and the hexagonal shaft 7018 fixed at the end of the rotating shaft 7014 rotates synchronously. The hexagonal shaft 7018 and the hexagonal slide column 7037 slide along the hexagonal slide groove 7036 in the threaded rod 7017, and at the same time drive the threaded rod 7017 to rotate synchronously, realizing the linear motion of the threaded rod 7017 screwing in or out of the drive cylinder 7016.

[0037] When the threaded rod 7017 is screwed into the drive cylinder 7016, the end of the threaded rod 7017 contacts the drive piston 7020 inside the drive cylinder 7016, continuously pushing the drive piston 7020 to compress the drive spring 7021. The drive spring 7021 is subjected to force, undergoes compression deformation, and stores elastic potential energy. During the displacement of the drive piston 7020 under pressure, the hydraulic oil between the drive piston 7020 and the isolation plate 7019 is squeezed. The hydraulic oil enters the second cone groove 7025 of the flow limiting plate 7024 through the first cone groove 7022 of the isolation plate 7019, and then flows outward through the flow limiting hole 7026 connected by the second cone groove 7025. The flow-limiting orifice 7026 has a small diameter. When the hydraulic oil is squeezed through the orifice at high speed, a pressure difference is formed, which pushes the flow-limiting plate 7024 and drives the guide rod 7028 to slide along the inside of the guide groove 7027. The guide rod 7028 simultaneously compresses the guide spring 7029, causing the flow-limiting plate 7024 to detach from the opening of the opening and closing groove 7023. After the flow-limiting plate 7024 separates from the opening and closing groove 7023, the hydraulic oil flowing out of the first conical groove 7022 can directly flow through the gap between the opening and closing groove 7023 and the flow-limiting plate 7024, thus getting rid of the flow-limiting constraint of the orifice 7026 and greatly improving the flow rate of the hydraulic oil.

[0038] After passing through the isolation plate 7019, the hydraulic oil flows into the first guide pipe 7040 of the drive cylinder 7016, then flows into the first liquid pipe 7043, and then into the collection box 7042. The hydraulic oil inside the collection box 7042 is continuously supplied to the second liquid pipe 7044, and then introduced into the second guide pipe 7041 through the second liquid pipe 7044, and then enters the first liquid chamber 7030 inside the base 3 through the second guide pipe 7041. The newly added hydraulic oil pushes the first hydraulic piston 7031 in the first liquid chamber 7030 to move towards the second liquid chamber 7032. The first hydraulic piston 7031 drives the second hydraulic piston 7033 to move synchronously through the linkage rod 7034. The second hydraulic piston 7033 can form different degrees of sealing effect on the opening of the adjustment hole 7035 according to its own displacement distance.

[0039] When the tower 2 sways due to strong winds, the dynamic force generated by the tower 2 is transmitted downwards, through the connecting plate 6 to the flange 506, and then through the piston rod 505 connected to the flange 506 to the main piston 504. When the wind intensity is high, the impact load pushes the main piston 504 to slide downwards along the inner wall of the first hydraulic chamber 501. The main piston 504 simultaneously compresses the main spring 507, and the main spring 507 deforms to absorb part of the vibration stress. After being pressurized, the hydraulic oil stored in the first hydraulic chamber 501 flows into the second hydraulic chamber 7032 through the hydraulic hole 503. The hydraulic oil pressure inside the second hydraulic chamber 7032 continues to rise, and the hydraulic oil flows into the second hydraulic chamber 502 through the adjustment hole 7035. The newly added hydraulic oil squeezes the auxiliary piston 509 inside the second hydraulic chamber 502, pushing the auxiliary piston 509 to slide upwards along the inner wall of the second hydraulic chamber 502. The auxiliary piston 509 simultaneously compresses the auxiliary spring 5010, and the auxiliary spring 5010 further absorbs the vibration impact force, achieving a multi-stage buffering and shock absorption effect.

[0040] The stronger the wind force in the external environment, the stronger the airflow impact on the wing plate 704. The flutter amplitude and vibration frequency of the wing plate 704 increase synchronously, and the amplitude of the reciprocating torsional vibration of the torsion shaft 703 increases accordingly, directly increasing the travel distance of the reciprocating linear motion of the slide rod 705. After the travel of the slide rod 705 increases, the swing amplitude of the drive plate 707 driving the drive plate 709 around the support shaft 708 increases synchronously. The support shaft 708 is located below the drive plate 709, forming a stable lever transmission structure. The swing amplitude of the lower end of the drive plate 709 and the transmission force are amplified synchronously, pushing the toothed plate 7013 to increase the reciprocating sliding distance along the stroke rod 7012. The large stroke motion of the toothed plate 7013 drives the drive gear 7015 and the rotating shaft 7014 to achieve large-angle forward and reverse rotation, and the torque output of the rotation increases synchronously.

[0041] The rotating shaft 7014 continuously drives the hexagonal shaft 7018 and the hexagonal slide column 7037 to rotate synchronously. The hexagonal slide column 7037 slides along the hexagonal groove 7036 inside the threaded rod 7017, compensating for displacement deviations during the screwing-in or screwing-out process of the threaded rod 7017 and ensuring stable operation of the transmission structure throughout the entire process. The threaded rod 7017 continuously presses against the drive piston 7020, pushing the hydraulic oil to circulate rapidly, driving the first hydraulic piston 7031 and the second hydraulic piston 7033 to move towards the adjusting hole 7035. This device can be adjusted according to actual needs. Depending on the wind force, the sealing area of ​​the second hydraulic piston 7033 on the opening of the adjustment hole 7035 is changed, and the flow rate of hydraulic oil from the first hydraulic chamber 501 to the second hydraulic chamber 502 is precisely controlled. The stronger the wind, the greater the resistance generated by the hydraulic oil flow. The operating damping of this device automatically increases with the wind intensity, effectively suppressing the wind-induced resonance phenomenon of the iron tower 2 caused by strong winds, greatly reducing the sway amplitude of the iron tower 2, and continuously reducing the alternating dynamic stress generated by the tower body members and connection nodes, thereby improving the overall structural stability of the iron tower 2 under strong wind conditions.

[0042] When the threaded rod 7017 is screwed out of the drive cylinder 7016, the drive spring 7021, which is in a compressed state, releases its elastic potential energy and pulls the drive piston 7020 to reset. At the same time, the guide spring 7029, which is compressed inside the guide groove 7027, releases its elastic force and pushes the guide rod 7028 back into the guide groove 7027. The guide rod 7028 pulls the flow limiting plate 7024 to re-embed into the opening and closing groove 7023, and the structure returns to the closed flow limiting state. At this time, the hydraulic oil between the first liquid guide pipe 7040 and the isolation plate 7019 can only slowly penetrate into the cavity between the isolation plate 7019 and the drive piston 7020 through the flow limiting hole 7026. The flow limiting effect of the flow limiting hole 7026 greatly reduces the hydraulic oil return rate and slows down the reset speed of the drive piston 7020.

[0043] During a single reciprocating torsion stroke of the torsion shaft 703, the threaded rod 7017 completes one full cycle of screwing in and out. The flow-limiting and delaying effect of the hydraulic oil separates the screwing out motion of the threaded rod 7017 from the resetting motion of the drive piston 7020, avoiding structural transmission interference. As the external wind intensity gradually increases, the threaded rod 7017 screws into the drive cylinder 7016 in a progressive manner, continuously pushing the drive piston 7020 to squeeze out hydraulic oil, thus gradually increasing the damping of the device. As the external wind intensity gradually decreases, the threaded rod 7017 screws out of the drive cylinder 7016 in a decreasing manner, and the resetting distance of the drive piston 7020 gradually increases, with the damping of the device decreasing synchronously. This achieves adaptive buffering adjustment under all wind conditions.

[0044] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A stress buffering device for long-span transmission towers, comprising: The tower base and the iron tower mounted on top of the tower base are characterized in that they further include: The base is bolted to the corners on all four sides of the tower base; the flange plate is fixed below the base; the buffer is slidably installed inside the base; the connecting plate is bolted to the corners on all four sides of the tower base; and the air conditioning component is fixed to the tower base. The air conditioning component includes: a dust sealing box fixed to the tower base; a mounting base fixed inside the dust sealing box; a torsion shaft rotatably mounted on the dust sealing box; a wing plate fixed above the torsion shaft, with an asymmetrical airfoil cross-section; a sliding rod slidably inserted into the dust sealing box, with one end inside the dust sealing box slidably inserted above the mounting base; a drive base fixed to the end of the sliding rod inside the dust sealing box; a drive gear plate fixed below the drive base; a support shaft fixed to the mounting base; a drive plate rotatably mounted on the support shaft; and a first gear assembly fixed... Above the drive plate, and meshing with the drive gear plate; the second gear set, fixed below the drive plate; the stroke rod, both ends fixed to the mounting base; the gear plate, slidably sleeved on the stroke rod, with its upper teeth meshing with the second gear set; the rotating shaft, rotatably mounted on the mounting base, located below the gear plate; the drive gear, fixed on the rotating shaft, meshing with the lower teeth of the gear plate; the drive cylinder, fixed on the mounting base; the threaded rod, threaded into the drive cylinder; the hexagonal shaft, one end fixed to the rotating shaft, the other end slidably inserted... The following components are included: a threaded rod; an isolation plate fixed inside the drive cylinder; a drive piston slidably disposed inside the drive cylinder; a drive spring, one end fixed to the inner wall of the drive cylinder and the other end fixed to the drive piston; a first conical groove formed on the isolation plate; an opening / closing groove formed on the side of the isolation plate away from the first conical groove and connected to the first conical groove; a flow-limiting plate located inside the opening / closing groove; a second conical groove formed on the flow-limiting plate; a flow-limiting orifice formed on the side of the flow-limiting plate away from the second conical groove and connected to the second conical groove; and a guide groove. Within the opening and closing groove; a guide rod, one end of which is slidably disposed within the guide groove, and the other end fixed to the flow limiting plate; a guide spring, one end of which is fixed to the guide rod, and the other end fixed within the guide groove; a first liquid chamber, located within the base; a first liquid piston, slidably disposed within the first liquid chamber; a second liquid chamber, located within the base; a second liquid piston, slidably disposed within the second liquid chamber; a linkage rod, one end of which is fixed to the first liquid piston, and the other end of which is fixed to the second liquid piston; and an adjustment hole, located within the base and connected to the second liquid chamber.

2. The stress buffer device for a long-span transmission tower according to claim 1, characterized in that, The air conditioning component also includes: A hexagonal groove is formed inside the threaded rod; a hexagonal slide column is slidably disposed in the hexagonal groove and fixed to the end of the hexagonal shaft located inside the threaded rod; a limiting collar is fixed to the end of the threaded rod located inside the drive cylinder; and a limiting ring is fixed inside the second liquid chamber.

3. A stress buffering device for long-span transmission towers according to claim 2, characterized in that, The air conditioning component also includes: The first liquid guide tube is fixed at one end to the drive cylinder and extends out of the dust sealing box at the other end; the second liquid guide tube is fixedly inserted into the base, and one end of the second liquid guide tube extends into the first liquid chamber; the liquid collection box is fixed in the tower base; the first liquid pipe is fixed at one end to the first liquid guide tube and at the other end to the liquid collection box; the second liquid pipe is fixed at one end to the second liquid guide tube and at the other end to the liquid collection box.

4. A stress buffer device for long-span transmission towers according to claim 3, characterized in that, The air conditioning component also includes: A sleeve is rotatably fitted onto a torsion shaft; a ball head is movably embedded in the sleeve; a first rotating seat is fixed to the ball head; a second rotating seat is fixed to the end of the slide rod away from the dust box; and a swing plate is rotatably mounted on the first rotating seat at one end and on the second rotating seat at the other end.

5. A stress buffer device for long-span transmission towers according to claim 4, characterized in that, The air conditioning component also includes: A bushing is fixed to the dust box and fitted under the torsion shaft; a spring seat is fixed to one end of the torsion shaft extending into the dust box; a torsion spring is fitted onto the torsion shaft, with one end fixed to the bottom of the dust box and the other end fixed to the spring seat.

6. A stress buffering device for long-span transmission towers according to claim 1, characterized in that, The torsion axis is located at one-quarter of the front end of the airfoil.

7. A stress buffering device for long-span transmission towers according to claim 1, characterized in that, The buffer includes: The first hydraulic chamber is located inside the base; the second hydraulic chamber is located inside the base and is connected to the adjustment hole; the hydraulic hole is located inside the base and is connected to both the first and second hydraulic chambers.

8. A stress buffering device for long-span transmission towers according to claim 7, characterized in that, The buffer also includes: The main piston is slidably disposed in the first hydraulic chamber; the piston rod is fixed at one end to the main piston and extends out of the base at the other end; the flange is fixed to the end of the piston rod that extends out of the base and is bolted to the bottom of the mating plate.

9. A stress buffering device for long-span transmission towers according to claim 8, characterized in that, The buffer also includes: The main spring is fixed at one end to the bottom of the first hydraulic chamber and at the other end to the main piston; the limiting post is fixed at the bottom of the first hydraulic chamber; the auxiliary piston is slidably disposed in the second hydraulic chamber; and the auxiliary spring is fixed at one end to the top of the second hydraulic chamber and at the other end to the auxiliary piston.

10. A stress buffering device for long-span transmission towers according to claim 9, characterized in that, The buffer also includes: A sealing groove is formed inside the base; a sealing ring is embedded in the sealing groove and fitted onto the piston rod; a limiting auxiliary ring is fixed inside the second hydraulic chamber and located below the auxiliary piston.

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