A damping device and a power iron tower using the same

Abstract

The application relates to the field of power transmission, in particular to a damping device and a power iron tower applying the same. The damping device comprises a plurality of cable seats, the cable seats are installed on an iron tower and are hingedly connected with a connecting rod mechanism, the bottom of the connecting rod mechanism is connected with a connecting rope, the bottom of the connecting rope is connected with a counterweight block through a counterweight frame, the counterweight frame vertically slides in the iron tower; the connecting rod mechanism comprises a first connecting rod assembly and a second connecting rod assembly, the two are arranged as a pair and are symmetrically arranged; the bottom of the connecting rope is hingedly connected with a positioning rod, the positioning rod is connected with the counterweight rope and the counterweight block through a roller, a damping and damping assembly is arranged at the connecting rope and the positioning rod, reset springs are arranged between adjacent counterweight ropes. The application further comprises a power iron tower applying the damping device. The application achieves the effects of inhibiting cable vibration and galloping from the source of the cable seat, continuously dissipating vibration energy, realizing multi-stage damping and buffering, improving the wind resistance performance and operation stability of a power transmission line, adapting to complex field working conditions and flexibly adjusting the installation effect of the cable seat.

Description

Technical Field

[0001] This application relates to the field of power transmission technology, and in particular to a vibration damping device and a power transmission tower using the device. Background Technology

[0002] Overhead power transmission cables erected on power towers are laid out in the open for extended periods, completely exposed to natural wind conditions. Affected by complex meteorological factors such as gusts, persistent strong winds, and turbulent winds, the cables are highly susceptible to continuous oscillations, specifically including two types of vibration: high-frequency, small-amplitude wind vibrations and low-frequency, large-amplitude cable galloping. This prolonged oscillation causes the cable base, hanging hardware, and connecting fasteners to be subjected to continuous cyclic alternating loads. Under long-term fatigue, this easily leads to faults such as loosening of hardware, fastening failure, cable wear, and strand breakage. This not only significantly shortens the service life of the cables, hardware, and tower components but also easily causes safety accidents such as line discharge, tripping, and even line breakage and tower collapse, seriously threatening the stable and safe operation of high-voltage transmission lines. Especially in mountainous and open areas with abundant wind resources, frequent strong winds, and variable wind directions, the problem of cable wind-induced vibration and galloping is more severe, significantly increasing the line failure rate.

[0003] Currently, the industry's methods for reducing wind-induced vibration in overhead cables are relatively limited, generally employing the direct mounting of vibration dampers and phase spacers on the outside of the cable body. Vibration dampers primarily rely on their own damping structure to dissipate the high-frequency, low-wind vibration energy of the cable, providing some suppression of small-amplitude, high-frequency vibrations. However, they are poorly adapted to the low-frequency, large-amplitude cable swaying generated under strong wind conditions, resulting in insignificant vibration reduction and failing to address the core issue of large cable swaying under strong winds. Phase spacers, by constraining the relative displacement between multiple cables with rigid members, can only limit the swaying deviation between cable phases to a limited extent, providing only a localized restraint function. They cannot weaken wind-induced vibration excitation from the vibration source at the cable base. Under strong wind conditions, the alternating impact load generated by the cable swaying will still be directly and continuously transmitted to the cable base and tower mounting points, potentially causing fatigue damage to the mounting point structure over time.

[0004] Therefore, there is an urgent need to develop a vibration damping device that can adapt to various wind directions and strong wind conditions, effectively reduce cable sway displacement from the cable seat source, and power towers equipped with such a device. Summary of the Invention

[0005] In order to adapt to strong wind conditions with multiple wind directions and effectively reduce cable sway displacement from the source of the cable seat, this application provides a vibration damping device and a power tower using the device.

[0006] The technical solution for the vibration damping device and the power tower using the device provided in this application is as follows: A shock-absorbing device includes a cable base for laying cables. The cable base is installed on a tower. A linkage mechanism is hinged to the cable base. A connecting rope is connected to the bottom of the linkage mechanism. The linkage mechanism is used to transmit the angular swing and displacement of the cable base to the connecting rope. A counterweight is connected to the bottom of the connecting rope. A counterweight frame is provided between the connecting rope and the counterweight. The counterweight frame is vertically slidably connected to the tower.

[0007] By adopting the above technical solution, when outdoor wind acts on the cables erected on the power tower, the cables will reciprocate and oscillate, transmitting the oscillation displacement and vibration force to the cable seat installed on the tower's crossbar. This causes the cable seat to oscillate at an angle and move horizontally. During the oscillation of the cable seat, the hinged linkage mechanism moves synchronously and adaptively. The linkage mechanism can accurately receive and transmit the angular oscillation and horizontal displacement of the cable seat, stably transmitting the vibration displacement to the connecting rope at the bottom. The connecting rope undergoes a pulling motion due to the transmission action of the linkage mechanism. This causes the counterweight frame and counterweight blocks to move synchronously. The counterweight frame is vertically slidably mounted inside the tower, which can constrain and correct the horizontal swing displacement of the upper transmission. It converts the horizontal swing motion of the cable seat into the vertical sliding motion of the counterweight frame along the inside of the tower, while driving the bottom counterweight block to move vertically synchronously. This reduces the horizontal swing amplitude of the counterweight block. Relying on the inertia of the counterweight frame and counterweight block, it counteracts the wind-induced swing kinetic energy of the cable, continuously dissipates vibration energy, and suppresses the vibration and galloping of the cable from the source of the cable seat, thus achieving continuous and stable vibration reduction operation.

[0008] Optionally, the linkage mechanism includes a first linkage assembly, which includes a first linkage hinged to the cable seat and a first push rod hinged to the end of the first linkage away from the cable seat. The end of the first push rod away from the first linkage is hinged to a connecting shaft. The connecting shaft is axially horizontally arranged, and pull rods are rotatably connected to both ends of the connecting shaft. The pull rods are vertically arranged, and a connecting rope is hinged to the bottom of the pull rods.

[0009] By adopting the above technical solution, when the cable seat is affected by the wind vibration of the cable and causes angular swaying and horizontal displacement, the hinged connecting rod 1 and push rod 1 can be driven to rotate and transmit displacement in an adaptive manner. The multi-angle swaying displacement of the cable seat is smoothly and orderly transmitted to the horizontally set connecting shaft, so that the connecting shaft rotates around the hinge point of the push rod and connecting rod 1. The connecting shaft integrates and corrects the tilted and irregular swaying force and displacement, and simultaneously drives the vertically arranged tie rods at both ends to perform regular vertical linkage motion. Finally, the connecting rope hinged at the bottom of the tie rod outputs a stable vertical pulling displacement, realizing the precise conversion of the chaotic horizontal swaying and angular deflection of the cable seat into a regular vertical transmission displacement. The multi-stage hinged linkage structure of connecting rod 1, push rod 1, connecting shaft, and tie rod can buffer the sudden load caused by the instantaneous impact of wind force step by step, avoiding the vibration impact force from being directly concentrated on the cable seat and connecting rope, and providing a stable and reliable motion input for the subsequent vertical sliding and shock absorption of the counterweight frame.

[0010] Optionally, the linkage mechanism further includes a second linkage assembly located on top of the first linkage assembly. The second linkage assembly includes a second linkage hinged to the cable seat, a connecting rod hinged to the top of the tower, a second push rod hinged to the connecting rod, the second linkage hinged to the second push rod, and a top rod hinged to the end of the second push rod away from the connecting rod, the top rod hinged to the connecting shaft.

[0011] By adopting the above technical solution, when the user operates the tower, the cable at the top of the tower sways due to wind disturbance, causing the top cable seat to deflect and shift. The connecting rod two on the cable seat follows suit and drives the hinged push rod. Simultaneously, the push rod two relies on the connecting rod hinged at the top of the tower to form a stable support limit. The connecting rod two pushes the push rod two to rotate around its top hinge point. The displacement of the push rod two further drives the top hinged top rod to rotate. Finally, the top rod drives the connecting shaft to achieve movement. This multi-stage hinge linkage transforms multi-directional wind force into vertical force transmission, forming a stable top transmission system. The top of the tower is unobstructed and the wind conditions are complex, causing cables to sway randomly in multiple dimensions, including horizontal, oblique, and torsional directions. The multi-level hinge linkage uses the adaptive rotation and linkage displacement of multiple hinge points to uniformly correct and transform the wind swaying force and irregular swaying displacement of the cable seat in various directions into a regular vertical transmission force, which drives the connecting shaft to transmit power stably. This solves the problem that traditional transmission structures cannot adapt to multi-directional wind vibration and the force transmission is chaotic. It realizes the stable and adaptive transmission of multi-angle and large-amplitude wind swaying displacement of the top cable seat, and completes the smooth conversion of top vibration displacement into vertical transmission displacement.

[0012] Optionally, both the first and second linkage assemblies are configured as even-numbered groups. The even-numbered first linkage assemblies are arranged on both sides of the connecting shaft symmetrically. The connection points of the push rods of the first linkage assembly and the connecting shaft are close to each other. The push rods of the two second linkage assemblies are located outside the two push rods, so that the positions of the push rods are vertically intersecting and the left and right structures are the same on both sides of the connecting shaft.

[0013] By adopting the above technical solution, when the user operates the tower, the conventional cable seat integrates and corrects the chaotic multi-angle swing and horizontal displacement into a regular vertical transmission displacement through the first linkage assembly; the cable seat at the top of the tower amplifies the small swing angle and displacement by relying on the lever structure of the second linkage assembly, making up for the transmission stroke under light wind conditions. At the same time, the push rods one and two, which are crossed on the same side, form opposite forces when subjected to force, and use the difference in force of long and short lever arms to achieve partial self-cancellation of vibration load, leaving only the effective force difference to drive the connecting shaft; the multiple sets of first linkage assemblies and second linkage assemblies symmetrically arranged on the left and right sides of the connecting shaft further achieve complementary forces and symmetrical balance, so that excess, disordered, and off-center vibration energy is dissipated and filtered in advance at the transmission end, and finally outputs a stable and uniform effective vibration displacement to the rear counterweight structure, which, together with the vertical sliding of the counterweight frame, completes multi-stage vibration reduction.

[0014] Optionally, the connection between link one and the cable seat is a ball joint, and the connection between link two and the cable seat is also a ball joint.

[0015] By adopting the above technical solution, when the user uses the cable, the swaying caused by the wind is a multi-dimensional disordered sway in space. It not only has horizontal reciprocating sway and vertical deflection, but also multi-angle torsion and oblique sway. The ball joint has three-dimensional full rotational freedom, which can adapt to the spatial swing angle and small torsional displacement of the cable seat in any direction. It can fully adapt to the complex and ever-changing multi-directional wind field conditions in the field, and completely avoid the problems of limited angle, oblique sway jamming, stiffness and transmission obstruction of ordinary planar joints.

[0016] Optionally, a positioning rod is hinged to the bottom of the connecting rope, and the two sides of the counterweight frame are symmetrically hinged to the positioning rod. A roller is provided at the bottom of the positioning rod, and a counterweight rope is sleeved on the roller. The two ends of the counterweight rope are set as free ends, and the counterweight block is fixedly connected to the end of the counterweight rope.

[0017] By adopting the above technical solution, when the user uses the counterweights, the movement of the counterweights on both sides is completely constrained by the vertically sliding counterweight frame, which effectively prevents the counterweights from swinging horizontally and swaying randomly, greatly reducing the risk of impacting the inner wall of the iron tower. The flexible transmission structure of the rollers and counterweight ropes can adapt to the vertical reciprocating motion of the counterweight frame, and the counterweights on both sides move synchronously, achieving balanced damping and energy dissipation by relying on symmetrical counterweights.

[0018] Optionally, a damping shock absorption assembly is provided at the connection between the connecting rope and the positioning rod; the damping shock absorption assembly includes two guide cylinders hinged to the end of the positioning rod, the guide cylinders are symmetrically arranged with respect to the center line of the positioning rod and are inclined upward, a guide column is slidably connected inside the guide cylinder, the end of the guide column extends out of the guide rod and is hinged to the iron tower, a first shock absorption spring is sleeved on the guide column inside the guide cylinder, a push block is fixedly connected to the end of the guide column inside the guide cylinder, the inner diameter of the push block is larger than the inner diameter of the guide column, and a second shock absorption spring is sleeved on the part of the guide column outside the guide cylinder.

[0019] By adopting the above technical solution, when the cable sways in the wind and drives the positioning rod to produce vertical vibration and slight sway through the connecting rod assembly and connecting rope, the guide cylinders symmetrically and inclined at the end of the positioning rod move synchronously with the positioning rod, causing the guide column to slide and extend relative to the guide cylinder. During the upward vibration, the push block compresses the first damping spring inside the guide cylinder, achieving primary buffering and energy absorption; during the downward vibration and reset, the guide cylinder presses down the second damping spring, achieving secondary buffering and force relief. Relying on the reciprocating compression and rebound deformation of the first and second damping springs, the vibration impact energy transmitted by the connecting rope is consumed step by step, and the reciprocating vibration of the positioning rod and the lower counterweight structure is damped and suppressed in real time, reducing the vibration amplitude transmitted to the rear counterweight frame and counterweight block, thus achieving multi-stage buffering and vibration reduction.

[0020] Optionally, a first return spring is provided between adjacent counterweight ropes. The end of the first return spring is hinged to a connecting seat, which is sleeved on the counterweight rope. A positioning seat is sleeved on each counterweight rope, and a second return spring is hinged on the positioning seat. The end of the second return spring away from the counterweight rope is hinged to the iron tower.

[0021] By adopting the above technical solution, when the user uses the system, the four first return springs are sleeved on the outside of the counterweight ropes through the end connecting seats and form a closed loop structure. This can constrain the relative distance between adjacent counterweight ropes in real time. When the counterweight ropes shift laterally, stretch outward, or contract inward, a reverse return force is generated, causing the shifted counterweight ropes to quickly return to the central symmetrical position. At the same time, the positioning seats on each counterweight rope are hinged to the inner wall of the tower through the second return springs. When the counterweight structure swings or tilts, the second return springs stretch or compress synchronously, providing radial constraint and return force to the counterweight ropes and counterweight structure from the outside. This, together with the first return springs, achieves all-round, two-way coordinated return, ensuring that the counterweight damping structure can quickly return to the initial equilibrium position after vibration ends.

[0022] A power transmission tower includes a tower body and the aforementioned shock-absorbing device, which is mounted on the tower body.

[0023] By adopting the above technical solutions, when used by users, the tower body can provide stable installation support points and vertical sliding limit foundations for each linkage component, damping component and reset structure of the shock absorption device, ensuring the stable operation of multi-stage transmission, force cancellation buffer, displacement amplification and automatic reset functions, effectively suppressing cable wind vibration and galloping from the source of the cable seat, reducing fatigue loss of the line and hardware, significantly improving the wind resistance and operational stability of the transmission line, and adapting to windy and complex field conditions.

[0024] Optionally, the tower body has a cavity, and the counterweight frame is vertically slidably connected to the cavity; the cable seat is detachably connected to the end of the horizontal arm of the tower body.

[0025] By adopting the above technical solution, when the user uses the counterweight frame, it slides vertically and is connected to the cavity inside the tower body. The tower cavity can be used to form a closed vertical guiding and limiting space, which effectively restricts the horizontal movement and disorderly swing of the counterweight frame, strictly constrains the vibration movement to vertical sliding, and ensures accurate and stable shock absorption transmission. There is no need to weld and fix the cable seat and the cross arm. The installation and disassembly operations are simple and efficient. The installation position and number of cable seats can be flexibly adjusted according to the line layout requirements to adapt to different power transmission layout conditions. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a structural schematic diagram of the shock absorption device; Figure 3 This is a sectional view made to highlight the ball joint; Figure 4 This is a sectional view made to highlight the counterweight frame and the main body of the tower; Figure 5 This is a structural diagram of the counterweight rope, counterweight frame, and counterweight frame. Figure 6 This is a cross-sectional view of the damping and shock absorption assembly.

[0027] Explanation of reference numerals in the attached drawings: 1. Tower body; 11. Crossarm; 12. Cavity; 2. Cable seat; 21. Mounting plate; 22. Positioning plate; 23. Mounting buckle; 3. Linkage mechanism; 31. First linkage assembly; 311. Link 1; 312. Push rod 1; 32. Connecting shaft; 33. Tie rod; 331. Reinforcing shaft; 34. Second linkage assembly; 341. Link 2; 342. Connecting rod; 343. Push rod 2; 344. 4. Top rod; 4. Connecting rope; 41. Positioning rod; 42. Roller; 43. Counterweight rope; 431. First return spring; 432. Connecting seat; 433. Positioning seat; 434. Second return spring; 44. Counterweight frame; 45. Guide wheel; 46. Counterweight block; 47. Damping and shock absorption assembly; 471. Guide cylinder; 472. Guide column; 473. First shock absorption spring; 474. Push block; 475. Second shock absorption spring. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0031] This application discloses a shock absorption device, referring to... Figure 1 and Figure 2 The system includes a cable base 2, a linkage mechanism 3, a connecting rope 4, a counterweight frame 44, and a counterweight block 46. The cable base 2 is used to install on the tower and to lay cables. The linkage mechanism 3 is hinged to the cable base 2. The bottom of the linkage mechanism 3 is connected to the connecting rope 4, and the bottom of the connecting rope 4 is connected to the counterweight block 46. The counterweight frame 44 is located between the connecting rope 4 and the counterweight block 46 and is vertically slidably connected to the tower. This structure can convert the angular swing and displacement of the cable base 2 into the vertical sliding motion of the counterweight frame 44. Relying on the inertia of the counterweight frame 44 and the counterweight block 46, the kinetic energy of the wind-induced swing of the cable is countered in the opposite direction, and the vibration energy is continuously dissipated, thereby suppressing the vibration and galloping of the cable from the source of the cable base 2.

[0032] Reference Figure 3Specifically, the cable holder 2 includes a U-shaped mounting plate 21, a positioning plate 22, bolts, and nuts. The mounting plate 21 has mounting clips 23 for installing cables. The U-shaped structure of the mounting plate 21 facilitates its attachment to the tower. The positioning plate 22 is inserted into the U-shaped opening of the mounting plate 21. Bolts are fixedly connected to the mounting plate 21. The positioning plate 22 has through holes, through which bolts pass and are threaded with nuts. This structure makes installation very convenient. Users only need to slip the U-shaped mounting plate 21 onto the outside of the tower member and then tighten the nuts to clamp the mounting plate 21 and positioning plate 22 onto the tower member, thus locking and positioning the cable holder 2. Moreover, this connection method eliminates the need for drilling holes in the tower on-site, facilitating the adjustment of the cable holder 2's installation position on the tower crossbar. Simultaneously, the bolt-nut clamping connection provides a firm grip, capable of withstanding the reciprocating alternating loads transmitted from the connecting rod assembly, and is less prone to loosening or slippage. In special circumstances where bolt and nut connections are inconvenient, clips or clamps can be used to achieve similar installation and fixing functions.

[0033] Reference Figure 2 and Figure 4 Specifically, the linkage mechanism 3 includes a first linkage assembly 31, which comprises a first connecting rod 311 and a first push rod 312. The first connecting rod 311 is a rod with a certain strength and toughness, mounted on the cable seat 2 via a ball joint. This ball joint provides three-dimensional rotational freedom, adapting to any spatial swing angle and minute torsional displacement of the cable seat 2, avoiding the limitations of ordinary planar hinges such as angle restriction and jamming due to oblique swing. Of course, besides the ball joint, in some special cases, a universal joint can be used instead of a ball joint to achieve similar multi-angle rotation functions. The first push rod 312 is also a rod, with one end hinged to the end of the first connecting rod 311 away from the cable seat 2, and the other end hinged to a connecting shaft 32.

[0034] The connecting shaft 32 is horizontally oriented, with vertically oriented tie rods 33 rotatably connected to both ends. The connecting shaft 32 acts as a hub, integrating and correcting tilted and irregular oscillating forces and displacements. For example, when the forces and displacements transmitted from connecting rod 311 and push rod 312 are not in the same direction, the connecting shaft 32 can be adjusted to make the forces and displacements transmitted to the tie rods 33 more regular. A reinforcing shaft 331 is fixedly connected between the two tie rods 33. It is horizontally oriented and parallel to the connecting shaft 32, acting like a bridge to enhance the connection stability and overall strength between the two tie rods 33. The connecting rope 4 is hinged to the bottom of the pull rod 33. Through this multi-stage hinged linkage structure of connecting rod 311, push rod 312, connecting shaft 32, and pull rod 33, the chaotic horizontal swing and angular deflection of the cable seat 2 can be accurately converted into a regular vertical transmission displacement. It can also buffer the sudden load caused by the instantaneous impact of wind force step by step, avoiding the vibration impact force from being directly concentrated on the cable seat 2 and the connecting rope 4, and providing a stable and reliable motion input for the subsequent vertical sliding and shock absorption of the counterweight frame 44. For example, when encountering a sudden strong wind, this multi-stage hinged linkage structure can gradually disperse and mitigate the impact force, instead of letting the impact force all act on a certain component at once.

[0035] Specifically, for the cable seat 2 located at the top of the tower, the linkage mechanism 3 also includes a second linkage assembly 34, which includes a second connecting rod 341, a connecting rod 342, a second push rod 343, and a top rod 344. The second connecting rod 341 is mounted on the cable seat 2 at the top of the tower via a ball joint, also capable of accommodating multi-directional swaying. A rotary joint can also be used instead of the ball joint to achieve multi-directional rotation. The connecting rod 342 is hinged at the top of the tower, acting as a support point and providing a stable support foundation for subsequent components. One end of the second push rod 343 is hinged to the connecting rod 342, and the other end is hinged to the top rod 344; the second connecting rod 341 is also hinged to the second push rod 343. The other end of the top rod 344 is hinged to the connecting shaft 32. When the cable at the top of the tower sways due to wind disturbance, it will cause the top cable seat 2 to deflect and shift. The connecting rod 341 on the cable seat 2 moves accordingly and drives the hinged push rod 343. At the same time, the push rod 343 forms a stable support limit based on the connecting rod 342 hinged at the top of the tower. The connecting rod 341 pushes the push rod 343 to rotate around its top hinge point. The displacement of the push rod 343 further drives the top rod 344 hinged at the end to rotate. Finally, the top rod 344 drives the connecting shaft 32 to achieve movement. This multi-level articulated linkage transforms multi-directional wind force into vertical force transmission, forming a stable top transmission system. The top of the tower is unobstructed and the wind conditions are complex, causing cables to easily experience disordered horizontal, oblique, and torsional swaying. The multi-level articulated linkage, through the adaptive rotation and linkage displacement of multiple articulation points, uniformly corrects and transforms the wind swaying force and irregular swaying displacement of the cable seat 2 in various directions into a regular vertical transmission force, and drives the connecting shaft 32 to transmit power stably. This solves the problem that traditional transmission structures cannot adapt to multi-directional wind vibration and the force transmission is chaotic. It achieves stable and adaptive transmission of multi-angle and large-amplitude wind swaying displacement of the top cable seat 2, and completes the smooth conversion of top vibration displacement into vertical transmission displacement.

[0036] Specifically, both the first link assembly 31 and the second link assembly 34 are configured as an even number of groups. The even number of first link assemblies 31 are symmetrically arranged on both sides of the connecting shaft 32. The connection points of the push rods 312 of the two first link assemblies 31 and the connecting shaft 32 are close to each other. The push rods 343 of the two second link assemblies 34 are located outside the two push rods 312, so that the positions of the push rods 312 and the push rods 343 are intersecting vertically and are arranged on both sides of the connecting shaft 32 with the same left and right structure. In this layout, the push rods 312 and 343, which are intersecting vertically on the same side, generate opposing forces when subjected to loads. The difference in force between their long and short lever arms allows for partial self-cancellation of the vibration load, leaving only the effective force difference to drive the connecting shaft 32. The multiple sets of first and second linkage assemblies 31 and 34, symmetrically arranged on the left and right sides of the connecting shaft 32, further achieve complementary forces and symmetrical balancing. This allows excess, disordered, and off-center vibration energy to be dissipated and filtered at the transmission end, ultimately outputting a smooth and uniform effective vibration displacement to the rear counterweight structure. This, combined with the vertical sliding of the counterweight frame 44, completes multi-stage vibration damping. For example, when push rod 312 on one side is subjected to a large force, the symmetrical push rods 312 and 343 on the other side can generate opposing forces to balance and cancel out part of the force, thus making the entire system more stable.

[0037] Reference Figure 4 and Figure 5 Specifically, a positioning rod 41 is hinged to the bottom of the connecting rope 4. The positioning rod 41 is vertically positioned, and the two sides of the counterweight frame 44 are symmetrically hinged to the positioning rod 41. A roller 42 is provided at the bottom of the positioning rod 41, and a counterweight rope 43 is sleeved on the roller 42. The two ends of the counterweight rope 43 are set as free ends, and the counterweight blocks 46 are fixedly connected to the ends of the counterweight rope 43. A guide wheel 45 is provided near the corner inside the counterweight frame 44, and the counterweight rope 43 passes through the guide groove of the guide wheel 45. The two counterweight blocks 46 on both sides rely entirely on the vertically sliding counterweight frame 44 to achieve motion constraint, effectively preventing the counterweight blocks 46 from horizontally swinging and disorderly swaying, and greatly reducing the risk of impacting the inner wall of the tower. The guide wheel 45 limits and guides the counterweight rope 43, which can prevent the counterweight rope 43 from deviating, rubbing, or jamming, and ensure that the counterweight rope 43 changes direction and slides smoothly and stably. The flexible transmission structure of the roller 42 and the counterweight rope 43 can adapt to the vertical reciprocating motion of the counterweight frame 44, with the counterweight blocks 46 on both sides moving synchronously. Balanced damping and energy dissipation are achieved through symmetrical counterweight. For example, during vibration, the guide wheel 45 acts like a track, guiding the counterweight rope 43 to move in the correct direction and preventing the counterweight rope 43 from becoming tangled.

[0038] Specifically, a first return spring 431 is provided between adjacent counterweight ropes 43. The end of the first return spring 431 is hinged to a connecting seat 432. The connecting seat 432 is sleeved on the counterweight rope 43. The four first return springs 431 form a closed loop. A positioning seat 433 is sleeved on each counterweight rope 43. A second return spring 434 is hinged on the positioning seat 433. The end of the second return spring 434 away from the counterweight rope 43 is hinged to the iron tower. Four first return springs 431 are sleeved on the outside of the counterweight ropes 43 via end connecting seats 432, forming a closed loop structure. This structure can constrain the relative distance between adjacent counterweight ropes 43 in real time. When the counterweight ropes 43 shift laterally, stretch outward, or contract inward, they generate a reverse return force, causing the shifted counterweight ropes 43 to quickly return to their central symmetrical position. Simultaneously, the positioning seats 433 on each counterweight rope 43 are hinged to the inner wall of the tower via second return springs 434. When the counterweight structure swings or tilts, the second return springs 434 stretch or compress synchronously, providing radial constraint and return force to the counterweight ropes 43 and the counterweight structure from the outside. This, combined with the first return springs 431, achieves all-round, bidirectional coordinated return, ensuring that the counterweight damping structure can quickly return to its initial equilibrium position after vibration ends. For example, when one side of the counterweight rope 43 shifts outward, the corresponding first return spring 431 will generate a pulling force to pull it back, while the second return spring 434 will also provide a corresponding force to assist in the return.

[0039] Reference Figure 6Specifically, a damping and shock-absorbing assembly 47 is installed at the connection point between the connecting rope 4 and the positioning rod 41. The damping and shock-absorbing assembly 47 includes a guide cylinder 471, a guide post 472, a first shock-absorbing spring 473, a push block 474, and a second shock-absorbing spring 475. There are two guide cylinders 471, which are hinged to the ends of the positioning rod 41 and are symmetrically arranged with respect to the center line of the positioning rod 41, while also tilting upwards. The guide post 472 is slidably connected inside the guide cylinder 471, and its end extends out of the guide rod and is hinged to the tower. The first shock-absorbing spring 473 is sleeved inside the guide post 472 located in the guide cylinder 471, and the push block 474 is fixedly connected to its end. The inner diameter of the push block 474 is larger than the inner diameter of the guide post 472, and the second shock-absorbing spring 475 is sleeved on the part of the guide post 472 located outside the guide cylinder 471. When the cable sways in the wind and drives the positioning rod 41 to generate vertical vibration and slight sway through the connecting rod assembly and connecting rope 4, the guide cylinders 471, which are symmetrically inclined at the end of the positioning rod 41, move synchronously with the positioning rod 41, causing the guide column 472 to slide and extend relative to the guide cylinder 471. During the upward vibration, the push block 474 compresses the first damping spring 473 inside the guide cylinder 471, acting like a spring compressor to achieve primary buffering and energy absorption. During the downward vibration and reset, the guide cylinder 471 presses down on the second damping spring 475 to achieve secondary buffering and force relief. Relying on the reciprocating compression and rebound deformation of the first damping spring 473 and the second damping spring 475, the vibration impact energy transmitted by the connecting rope 4 is consumed step by step, and the reciprocating vibration of the positioning rod 41 and the lower counterweight structure is damped and suppressed in real time, reducing the vibration amplitude transmitted to the rear counterweight frame 44 and counterweight block 46, thus achieving multi-stage buffering and vibration reduction.

[0040] The implementation principle of this embodiment is as follows: The vibration damping device transforms and processes the complex swing and displacement of the cable seat 2 through a clever linkage mechanism 3. The multi-stage hinged linkage structure can buffer impact loads, amplify small displacements, and achieve self-cancellation of vibration loads, enabling the swing and displacement of the cable seat 2 to be stably and accurately transmitted to the connecting rope 4. The connecting rope 4 drives the counterweight frame 44 and counterweight block 46 to move. The vertical sliding of the counterweight frame 44 converts the horizontal swing of the cable seat 2 into vertical motion. The inertia of the counterweight frame 44 and counterweight block 46 counteracts the wind-induced swing kinetic energy of the cable. At the same time, the damping and shock absorption component 47 and the return spring further enhance the damping and return effects, suppressing and buffering the vibration of the cable from multiple aspects. Compared with traditional vibration reduction methods, it can better adapt to multi-wind and high-wind conditions, effectively reducing the swing displacement of the cable from the source of the cable seat 2, significantly improving the stability and safety of the high-voltage line, and extending the service life of the cable and related accessories. Example

[0041] The difference between this embodiment and Embodiment 1 is that a rotary joint is used to connect link 311 and cable seat 2, and link 341 and cable seat 2 in linkage mechanism 3. The rotary joint also allows for multi-directional rotation, meeting the swing requirements of cable seat 2 under various wind conditions. In situations where cost control is critical or installation space is limited, a rotary joint may be a more suitable choice.

[0042] The implementation principle of this embodiment is as follows: the rotary joint can replace the ball joint to achieve a similar multi-directional rotation function, allowing the linkage mechanism 3 to still effectively transmit the swing and displacement of the cable seat 2 to the subsequent structure. At the same time, the rotary joint may have advantages such as easy installation and lower cost. In specific application scenarios, it can reduce the overall cost of the system or solve the problem of limited installation space while ensuring the vibration damping effect. It can also achieve the purpose of suppressing cable vibration and galloping from the source of the cable seat 2, and it represents an adaptive improvement to existing technologies. Example

[0043] The present application provides a power transmission tower, including a tower body 1 and a shock-absorbing device disclosed in Embodiments 1 and 2, wherein the shock-absorbing device is mounted on the tower body 1.

[0044] Specifically, a cavity 12 is provided inside the tower body 1, and the counterweight frame 44 is vertically slidably connected to the cavity 12. This cavity 12 acts like a track, providing precise guidance and limitation for the vertical sliding of the counterweight frame 44. The cavity 12 of the tower can be used to form a closed vertical guiding and limiting space, effectively restricting the horizontal movement and disorderly swing of the counterweight frame 44, strictly constraining the vibration motion to vertical sliding, and ensuring precise and stable vibration damping transmission.

[0045] Specifically, the cable seat 2 is bolted to the end of the cross arm 11 of the tower body 1. This detachable connection method eliminates the need for welding, making installation and disassembly simple and efficient. Users can flexibly adjust the installation position and quantity of the cable seat 2 according to the line layout requirements, thereby adapting to different power transmission layout conditions. For example, in areas with different terrains or different power transmission requirements, the cable seat 2 can be easily adjusted and installed.

[0046] The implementation principle of this embodiment is as follows: The tower body 1 provides a stable installation support and vertical sliding limit foundation for the various linkage components, damping components and reset structure of the shock absorption device. The shock absorption device converts and processes the swing and displacement of the cable seat 2, and then utilizes the structural advantages of the tower body 1 to precisely limit the counterweight frame 44, so that the entire device can operate stably and realize functions such as multi-stage transmission, force cancellation buffering, displacement amplification and automatic reset. It effectively suppresses cable wind vibration and galloping from the source of the cable seat 2, reduces fatigue loss of the line and hardware, significantly improves the wind resistance and operational stability of the transmission line, and can be well adapted to the complex field conditions with strong winds.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A shock absorption device, characterized in that: Includes a cable seat (2), which is used to lay cables. The cable seat (2) is installed on the iron tower. A linkage mechanism (3) is hinged on the cable seat (2). A connecting rope (4) is connected to the bottom of the linkage mechanism (3). The linkage mechanism (3) is used to transmit the angular swing and displacement of the cable seat (2) to the connecting rope (4). A counterweight block (46) is connected to the bottom of the connecting rope (4). A counterweight frame (44) is set between the connecting rope (4) and the counterweight block (46). The counterweight frame (44) is vertically slidably connected to the iron tower.

2. The shock absorption device according to claim 1, characterized in that: The linkage mechanism (3) includes a first linkage assembly (31), which includes a first linkage (311) hinged to the cable seat (2) and a first push rod (312) hinged to the end of the first linkage (311) away from the cable seat (2). The end of the first push rod (312) away from the first linkage (311) is hinged to a connecting shaft (32). The connecting shaft (32) is horizontally axially arranged, and the two ends of the connecting shaft (32) are rotatably connected to a pull rod (33). The pull rod (33) is vertically arranged, and the connecting rope (4) is hinged to the bottom of the pull rod (33).

3. A shock-absorbing device according to claim 2, characterized in that: The linkage mechanism (3) further includes a second linkage assembly (34), which is located on top of the first linkage assembly (31). The second linkage assembly (34) includes a second linkage (341) hinged to the cable seat (2). A connecting rod (342) is hinged to the top of the tower. A second push rod (343) is hinged to the connecting rod (342). The second linkage (341) is hinged to the second push rod (343). A top rod (344) is hinged to the end of the second push rod (343) away from the connecting rod (342). The top rod (344) is hinged to the connecting shaft (32).

4. A shock-absorbing device according to claim 3, characterized in that: The first link assembly (31) and the second link assembly (34) are both set to an even number of groups. The even number of first link assemblies (31) are all set on both sides of the connecting shaft (32) symmetrically. The push rods (312) of the first link assembly (31) and the connection points of the connecting shaft (32) are close to each other. The push rods (343) of the two second link assemblies (34) are located outside the two push rods (312), so that the positions of the push rods (312) and the push rods (343) are intersecting vertically. The left and right structures are the same and are set on both sides of the connecting shaft (32).

5. A shock-absorbing device according to claim 3, characterized in that: The first connecting rod (311) and the cable seat (2) are connected by a ball joint, and the second connecting rod (341) and the cable seat (2) are connected by a ball joint.

6. A shock-absorbing device according to claim 1, characterized in that: The bottom of the connecting rope (4) is hinged to a positioning rod (41), and the two sides of the counterweight frame (44) are symmetrically hinged to the positioning rod (41). A roller (42) is provided at the bottom of the positioning rod (41), and a counterweight rope (43) is sleeved on the roller (42). The two ends of the counterweight rope (43) are set as free ends, and the counterweight block (46) is fixedly connected to the end of the counterweight rope (43).

7. A shock-absorbing device according to claim 1, characterized in that: A damping shock absorption component (47) is provided at the connection between the connecting rope (4) and the positioning rod (41); The damping and shock absorption assembly (47) includes two guide cylinders (471) hinged to the end of the positioning rod (41). The guide cylinders (471) are symmetrically arranged with respect to the center line of the positioning rod (41) and are inclined upward. A guide column (472) is slidably connected inside the guide cylinder (471). The end of the guide column (472) extends out of the guide rod and is hinged to the iron tower. A first shock-absorbing spring (473) is sleeved inside the guide cylinder (471) of the guide column (472). A push block (474) is fixedly connected to the end of the guide column (472) inside the guide cylinder (471). The inner diameter of the push block (474) is larger than the inner diameter of the guide column (472). A second shock-absorbing spring (475) is sleeved on the part of the guide column (472) outside the guide cylinder (471).

8. A shock-absorbing device according to claim 6, characterized in that: A first return spring (431) is provided between adjacent counterweight ropes (43). A connecting seat (432) is hinged to the end of the first return spring (431). The connecting seat (432) is sleeved on the counterweight rope (43). A positioning seat (433) is sleeved on each counterweight rope (43). A second return spring (434) is hinged on the positioning seat (433). The end of the second return spring (434) away from the counterweight rope (43) is hinged to the iron tower.

9. A power transmission tower, comprising a tower body (1), characterized in that: It also includes the shock-absorbing device as described in any one of claims 1 to 8, wherein the shock-absorbing device is mounted on the tower body (1).

10. A power transmission tower according to claim 9, characterized in that: The tower body (1) has a cavity (12) inside, and the counterweight frame (44) is vertically slidably connected to the cavity (12); the cable seat (2) is detachably connected to the end of the cross arm (11) of the tower body (1).

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