Multi-frequency vibration damper for transmission conductor

Abstract

The present invention relates to the technical field of transmission line protection equipment, and in particular to a multi-frequency vibration damper for a transmission conductor, comprising a conductor clamping mechanism, a steel strand cluster, and two weights. The tail portion of each weight is provided with a U-shaped recess, the recess bottom of the U-shaped recess is correspondingly connected to an end of the steel strand cluster, and at least one energy dissipation assembly is provided in the U-shaped recess. The energy dissipation assembly comprises a mounting plate, a bending energy-dissipation member, and an adjustment assembly. The mounting plate is fixedly mounted on the steel strand cluster and is used for mounting the bending energy-dissipation member. The adjustment assembly is mounted on the side wall of the U-shaped recess, and the bending degree of the bending energy-dissipation member can be adjusted by means of the adjustment assembly. When the weight swings for vibration damping, the bending energy-dissipation member is repeatedly compressed and stretched, thereby accelerating dissipation of vibration energy. By adjusting the bending degree of the bending energy-dissipation member by means of the adjustment assembly, natural frequencies of the multi-frequency vibration damper are increased, thereby enabling the multi-frequency vibration damper to have a multi-frequency adjustment characteristic.

Description

A multi-frequency vibration damper for power transmission lines Technical Field

[0001] This invention belongs to the technical field of power transmission line protection equipment, specifically a multi-frequency vibration damper for power transmission lines. Background Technology

[0002] Modern power systems use long-distance overhead transmission for high-voltage and ultra-high-voltage transmissions, employing large-span and highly flexible transmission lines. As a result, when the transmission lines are subjected to external excitation loads (wind, snow cover, etc.), coupled with the inherent characteristics of the transmission lines themselves (frequency, tension, etc.), the two can couple and cause the transmission lines to vibrate.

[0003] Common vibration types include: wind vibration, secondary span vibration, and galloping.

[0004] Light wind vibration is common in power transmission lines located in flat and open terrain. When a steady light wind of 0.5~10m / s blows vertically across the power transmission line, a periodically detached Karman vortex street will be formed on the leeward side of the power transmission line. The alternating up and down excitation force generated by the vortex street detachment, if the frequency is close to the natural frequency of the power transmission line, will cause high-frequency low-amplitude resonance of the power transmission line, which is the most common type of vibration.

[0005] Secondary span vibrations often occur in transmission lines using split conductors. When the wind speed is between 1 and 20 m / s, the airflow around each sub-conductor of the split conductor interferes with each other, generating aerodynamic interference forces, which cause relative, low-frequency vibrations between the sub-conductors, potentially leading to collisions and wear between the sub-conductors.

[0006] Galloping often occurs in power transmission lines where the conductor surface is covered with ice and snow or in windy valleys. The vibration frequency is low but the amplitude is extremely large, which can cause the transmission conductor to swing and jump significantly. In severe cases, it can cause conductor strands to break, towers to tilt or even collapse.

[0007] As the most common type of vibration, wind-induced vibration can cause fatigue damage and wear to transmission lines and fittings, as well as insulator breakage. The core of protecting transmission lines from wind-induced vibration is to dissipate the vibration energy of the transmission lines and reduce the probability of resonance. This is mainly achieved through the installation of vibration damping devices and the optimization of transmission lines and fittings. Vibration dampers are commonly used vibration damping devices. The appropriate model is selected based on the type of transmission line and span. Domestically available models include symmetrical FD type and asymmetrical FR type. They are generally installed near the suspension clamps and in the middle of the span, and the number typically increases with the span length.

[0008] Vibration dampers mainly consist of three parts: clamps, steel strands, and hammer heads. For a single damper, these structures are fixed, meaning its natural vibration frequencies are constant or limited in number, thus limiting the range of transmission line vibration frequencies it can cover. For example, the traditional symmetrical FD-type vibration damper typically matches 1-2 natural frequencies; its vibration reduction effect decreases significantly when the transmission line vibration frequency deviates. On the other hand, the asymmetrical FR-type vibration damper has different hammer heads on both sides and different distances between the hammer heads and clamps, generally having 4 natural vibration frequencies. It can cover a wider range of transmission line vibration frequencies than the FD-type damper, typically reaching 3-120Hz. Some models add elastic damping elements at the connection points between the steel strands, hammer heads, and clamps. The internal friction of these damping elements further enhances energy dissipation and improves vibration reduction stability.

[0009] The span, height, and terrain conditions of transmission lines in the same region vary, and the intensity of wind loads also varies in different seasons. Therefore, the vibration characteristics of transmission lines are also different. In areas where the wind load cycle varies greatly, the vibration frequency of transmission lines also varies considerably. Power personnel have to fine-tune the position of vibration dampers or replace them with other types of vibration dampers during regular line maintenance to adapt to these changes. Working at height poses safety hazards and increases the workload of maintaining overhead transmission lines. Summary of the Invention

[0010] To address the problem that the aforementioned vibration dampers cannot adapt to vibration frequencies under different operating conditions, this application provides a multi-frequency vibration damper for power transmission lines, suitable for multi-frequency vibration reduction of power transmission lines under various operating conditions. The technical solution adopted by this invention is as follows:

[0011] A multi-frequency vibration damper for power transmission conductors includes a clamp mechanism, a steel strand bundle, and two hammer heads. The upper part of the clamp mechanism is used to hang and clamp the power transmission conductor. The steel strand bundle is installed horizontally through the lower part of the clamp mechanism. One hammer head is installed at the left end of the steel strand bundle, and the other hammer head is installed at the right end of the steel strand bundle. The two hammer heads are arranged opposite to each other. The tail of each hammer head is provided with a U-shaped groove. The bottom of the U-shaped groove is connected to the end of the steel strand bundle. At least one energy-dissipating component is provided in the U-shaped groove. The energy-dissipating component includes a mounting plate, a bending energy-dissipating component, and an adjustment component. The mounting plate is fixedly mounted on the steel strand bundle, and the adjustment component is installed on the side wall of the U-shaped groove.

[0012] The bending energy-dissipating component is C-shaped and includes an outer bending spring plate, a friction plate, and an inner bending spring plate that are tightly attached to each other from the outside to the inside. The outer bending spring plate, friction plate, and inner bending spring plate are all C-shaped. One end of the outer bending spring plate is fixed to the end of the mounting plate, and the other end is connected to the adjustment component. The friction plate and the inner bending spring plate are both located in the C-shaped bending cavity of the outer bending spring plate. The bending degree of the bending energy-dissipating component can be adjusted by the adjustment component.

[0013] The aforementioned multi-frequency vibration damper for power transmission lines has a limiting plate provided in the C-shaped bending cavity of the outer bending spring plate. The limiting plate is used to confine the inner bending spring plate and the friction plate within the C-shaped bending cavity of the outer bending spring plate.

[0014] The aforementioned multi-frequency vibration damper for power transmission lines has an outer surface of the friction plate that is rough and has a friction coefficient of 0.40~0.50, or / and an inner surface of the friction plate that is rough and has a friction coefficient of 0.35~0.45.

[0015] The aforementioned multi-frequency vibration damper for transmission lines includes an adjusting assembly comprising a stud, a protective nut, an adjusting nut, and a spring. One end of the stud is fixed to the side wall of a U-shaped groove. The protective nut is screwed onto the stud and close to the other end of the stud. The adjusting nut is screwed onto the stud and away from the other end of the stud. The spring is compressed and sleeved on the stud, located between the adjusting nut and the side wall of the U-shaped groove. The other end of the outer curved spring plate is sleeved on the stud and located between the protective nut and the adjusting nut.

[0016] The aforementioned transmission line uses a multi-frequency vibration damper, and the U-shaped groove is equipped with two energy-dissipating components, which are symmetrically arranged on both sides of the steel strand bundle.

[0017] The aforementioned multi-frequency vibration damper for power transmission conductors includes a steel strand bundle comprising at least one long steel strand, at least one short steel strand, and a steel wire. The two ends of the long steel strand are respectively connected to the hammer head. The length of the short steel strand is shorter than that of the long steel strand. The two ends of the short steel strand are free ends. The short steel strand and the long steel strand are wound and tightened together by the steel wire.

[0018] The aforementioned multi-frequency vibration damper for power transmission lines has the ends of the steel strand bundles connected to the hammer head via ball joints.

[0019] The multi-frequency vibration damper for the aforementioned power transmission conductors includes a clamp mechanism comprising a base, a connecting rod, a fixed pressure plate, a movable pressure plate, a mounting clamp, and a clamping clamp.

[0020] The base has a through hole on its side for horizontally installing a bundle of steel strands. The lower end of the connecting rod is fixed to the base and the upper end is fixed to a fixed pressure plate. The hanging clamp is fixed to the fixed pressure plate and the clamping clamp is fixed to the movable pressure plate. The movable pressure plate is installed on the fixed pressure plate by connecting bolts so that the clamping clamp and the hanging clamp can cooperate to clamp and install on the power transmission line.

[0021] The aforementioned multi-frequency vibration damper for power transmission lines has a partition block between the fixed pressure plate and the movable pressure plate. The partition block creates gaps between the fixed pressure plate and the movable pressure plate, and between the hanging clamp and the clamping clamp. The partition block is fixedly mounted on the fixed pressure plate, the movable pressure plate, or the connecting rod.

[0022] The aforementioned multi-frequency vibration damper for power transmission lines has a cylindrical hammer head, a U-shaped groove symmetrically arranged along the axis of the hammer head, a counterweight groove at the head of the hammer head, and a spherical arc surface at the end of the head of the hammer head.

[0023] The beneficial effects of this invention are as follows:

[0024] Firstly, this multi-frequency vibration damper has an energy-dissipating component inside the hammer head. When the hammer head swings to reduce vibration, the bending energy-dissipating component is repeatedly compressed and stretched, accelerating the dissipation of vibration energy. Even under low-amplitude vibration conditions, it can maintain a stable vibration reduction effect. Moreover, by adjusting the bending degree of the bending energy-dissipating component through the adjustment component, the natural frequency of the multi-frequency vibration damper is increased, giving it multi-frequency adjustment characteristics. This allows it to meet the different vibration frequencies of transmission lines under various working conditions, adapting to the vibration frequencies of transmission lines with different spans and tensions, and achieving multi-frequency vibration reduction. It is especially suitable for the wide-frequency vibration conditions of ultra-high voltage large-section transmission lines.

[0025] Secondly, the bending energy-consuming component adopts a three-layer structure with a friction plate in the middle layer to increase friction and thus improve energy consumption efficiency.

[0026] Third, the adjustment component adopts a stud, spring and nut structure. The spring's rebound force compresses the nut to prevent loosening. During operation of the vibration damper, it can avoid frequency changes caused by the loosening of the bending energy-consuming parts, thus ensuring the stable operation of the vibration damper.

[0027] Fourth, frictional energy is also consumed within the steel strand bundle during vibration damping hammer operation. The steel strand bundle uses a combination of long and short steel strands. The two ends of the short steel strands are free ends, which increases frictional energy consumption, further accelerates energy dissipation, and improves the vibration damping effect of the vibration damping hammer. On the other hand, the short steel strands can be easily replaced without disassembling the hammer head. In this way, the natural frequency of the vibration damping hammer can be adjusted by selecting short steel strands of different specifications.

[0028] Fifth, the structure of the clamp mechanism makes it easy to install onto the power transmission line. After the spacer is installed with connecting bolts, there is a gap between the fixed pressure plate and the movable pressure plate, that is, between the hanging clamp and the clamping clamp. In this way, the hanging clamp and the clamping clamp can be pre-tightened, thus clamping the power transmission line more stably. Attached Figure Description

[0029] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0030] Figure 2 is a front view of an embodiment of the present invention (the hammerhead is in cross-section).

[0031] Figure 3 is a schematic diagram of the hammer and energy-consuming component according to an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of the energy-consuming component according to an embodiment of the present invention (the bent energy-consuming component is in cross-section).

[0033] Figure 5 is a side view of the steel strand according to an embodiment of the present invention;

[0034] Figure 6 is a schematic diagram of the wire clamp mechanism according to an embodiment of the present invention;

[0035] Figure 7 is an exploded view of the wire clamp mechanism according to an embodiment of the present invention (the dashed line is the assembly reference line).

[0036] In the diagram: 1 is the wire clamp mechanism, 11 is the base, 12 is the connecting rod, 13 is the fixed pressure plate, 14 is the movable pressure plate, 15 is the partition block, 16 is the connecting bolt, 17 is the hanging clamp, 18 is the clamping clamp, and 19 is the through hole.

[0037] 2 is a bundle of steel strands, 21 is a long steel strand, 22 is a short steel strand, and 23 is a steel wire;

[0038] 3 is the hammerhead, 31 is the counterweight groove, and 32 is the U-shaped groove (also known as the tuning fork groove).

[0039] 4 is an energy-consuming component, 41 is a mounting plate, 42 is a bending energy-consuming component, 421 is an outer bending spring plate, 422 is an inner bending spring plate, 423 is a friction plate, 424 is a limiting plate, 43 is an adjusting component, 431 is a stud, 432 is a protective nut, 433 is an adjusting nut, and 434 is a spring.

[0040] 5 is a ball joint. Detailed Implementation

[0041] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings. The following embodiments are illustrative; unless otherwise specifically stated, the relative arrangement of components and steps and the numerical expressions described in these embodiments should not be construed as limiting the scope of the present invention.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form, and when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. Unless otherwise stated, the terms "installed," "connected," "fixed," "located in," "placed," etc., in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, integral casting, welding, etc.; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two elements or the interaction relationship of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the actual situation.

[0043] For ease of description, the present invention uses directional descriptions such as "upper," "lower," "left," "right," "bottom," "top," "front," "back," "side," "inner," and "outer," which do not limit the structure. They are merely for the purpose of understanding the structural principle of the present invention in conjunction with the accompanying drawings, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on the present invention.

[0044] This embodiment is a multi-frequency vibration damper for power transmission lines, as shown in Figures 1 and 2. It includes a clamp mechanism 1, a steel strand bundle 2, and two hammer heads 3. The upper part of the clamp mechanism 1 is used to clamp and install the power transmission line. The steel strand bundle 2 is installed horizontally through the lower part of the clamp mechanism 1. The two hammer heads 3 are arranged in a left-right opposite manner (i.e., the head of the hammer head 3 faces outward and the tail faces inward, similar to existing vibration damper products). One hammer head 3 is installed at the left end of the steel strand bundle 2, and the other hammer head 3 is installed at the right end of the steel strand bundle 2. The two hammer heads 3 are arranged on both sides of the clamp mechanism 1, and the distance between them and the clamp mechanism 1 can be equal or unequal. That is, just like the hammer head arrangement in existing vibration damper products: with the location of the clamp mechanism 1 as the midpoint, the two hammer heads 3 can be arranged symmetrically or asymmetrically.

[0045] The hammer head 3 is cylindrical, and the end face of the head of the hammer head 3 is a spherical arc surface. The head of the hammer head 3 is provided with a counterweight groove 31. In other embodiments, a counterweight can be installed at the counterweight groove 31. The counterweight can be installed in a conventional way, such as screw connection, thus providing more options for the natural frequency adjustment of the multi-frequency anti-vibration hammer of the present invention.

[0046] The tail of the hammer head 3 is provided with a U-shaped groove 32 (also called a tuning fork groove). The U-shaped groove 32 is symmetrically arranged along the axis of the hammer head 3. The center of the bottom of the U-shaped groove 32 is connected to the end of the steel strand bundle 2. At least one energy dissipation component 4 is provided in the U-shaped groove 32. In this embodiment, preferably, two energy dissipation components 4 are provided, one of which is located on the upper side of the steel strand bundle 2, and the other is symmetrically located on the lower side of the steel strand bundle 2. In other embodiments, if two or more energy dissipation components 4 are provided, they can be located on the same side of the steel strand bundle 2 or on the opposite side of the steel strand bundle 2. When the energy dissipation component 4 is located on the opposite side of the steel strand bundle 2, it can be arranged symmetrically or asymmetrically, both of which can achieve energy dissipation. The clamp mechanism 1 is clamped and installed on the transmission line. When the transmission line experiences slight wind vibration, the bending and internal friction of the steel strand bundle 2, the swinging of the hammer head 3, and the internal friction of the energy dissipation component 4 work together to achieve energy dissipation and vibration reduction, thereby suppressing the slight wind vibration of the transmission line.

[0047] Specifically, as shown in Figures 3 and 4, the energy-dissipating component 4 includes a mounting plate 41, a bending energy-dissipating component 42, and an adjustment component 43. The mounting plate 41 is fixedly mounted on the steel strand bundle 2, and the adjustment component 43 is mounted on the side wall of the U-shaped groove 32. One end of the bending energy-dissipating component 42 is mounted on the end of the mounting plate 41, and the other end is connected to the adjustment component 43. By adjusting the bending degree of the bending energy-dissipating component 42 through the adjustment component 43, the natural frequency of the vibration damper changes. Therefore, the multi-frequency vibration damper of this embodiment can achieve wide-frequency vibration reduction.

[0048] When the hammer head swings to reduce vibration, the bending energy-consuming component of the energy-consuming component is repeatedly compressed and stretched, accelerating the dissipation of vibration energy. Even under low-amplitude vibration conditions, it can maintain a stable vibration reduction effect. Moreover, by adjusting the bending degree of the bending energy-consuming component through the adjustment component, the natural frequency of the multi-frequency vibration damper is increased, giving the multi-frequency vibration damper multi-frequency adjustment characteristics. It can meet the different vibration frequencies of transmission lines under various working conditions, and can be adapted to the vibration frequencies of transmission lines with different spans and different tensions, realizing multi-frequency vibration reduction. It is especially suitable for the wide-frequency vibration conditions of ultra-high voltage large-section transmission lines.

[0049] Specifically, as shown in Figure 4, the bending energy-dissipating component 42 is C-shaped, comprising an outer bending spring plate 421, a friction plate 423, and an inner bending spring plate 422, which are sequentially attached from the outside to the inside. All three components are C-shaped. One end of the outer bending spring plate 421 is fixed (e.g., welded) to the end of the mounting plate 41, and the other end is connected to the adjusting assembly 43. The friction plate 423 is located between the outer bending spring plate 421 and the inner bending spring plate 422, and both are placed within the C-shaped bending cavity of the outer bending spring plate 421. The outer surface of the friction plate 423 is rough with a friction coefficient of 0.40~0.50, and the inner surface of the friction plate 423 is also rough with a friction coefficient of 0.35~0.45.

[0050] The outer bending spring plate 421, friction plate 423, and inner bending spring plate 422 are all elastic plates. In the state shown in Figure 4, the outer bending spring plate 421 is compressed but still has some compression space; it can also be said that the outer bending spring plate 421 has an extension tendency. Similarly, the inner bending spring plate 422 and friction plate 423 are also compressed within the C-shaped bending cavity of the outer bending spring plate 421, but still have some compression space, thus allowing the outer bending spring plate 421, friction plate 423, and inner bending spring plate 422 to fit tightly together sequentially. Furthermore, although the outer bending spring plate 421, friction plate 423, and inner bending spring plate 422 are tightly fitted together sequentially, there is no connecting structure between them, and the outer bending spring plate 421 and friction plate 423 also have no connecting structure with other components. Thus, when the hammer 3 swings, the outer surface of the friction plate 423 can slide relative to the outer bending spring plate 421, and the inner surface of the friction plate 423 can slide relative to the inner bending spring plate 422, generating frictional energy dissipation. At the same time, the outer bending spring plate 421, the friction plate 423, and the inner bending spring plate 422 will extend or be compressed to form elastic energy dissipation, so that the bending energy dissipation component 42 can consume part of the vibration energy of the power transmission line, achieving the vibration reduction effect.

[0051] The outer bending spring plate 421 is thick and long, capable of enclosing the friction plate 423 and the inner bending spring plate 422, which are both relatively thin and long. To further ensure the structural stability of the bending energy-dissipating component 42, as shown in Figure 4, a limiting plate 424 is provided within the C-shaped bending cavity of the outer bending spring plate 421. The limiting plate 424 can be welded into the C-shaped bending cavity of the outer bending spring plate 421. The limiting plate 424 is used to confine the inner bending spring plate 422 and the friction plate 423 within the C-shaped bending cavity of the outer bending spring plate 421, preventing them from detaching from the C-shaped bending cavity of the outer bending spring plate 421.

[0052] Specifically, as shown in Figures 3 and 4, the adjusting assembly 43 includes a stud 431, a protective nut 432, an adjusting nut 433, and a spring 434. One end of the stud 431 is fixed to the side wall of the U-shaped groove 32. The protective nut 432 is screwed onto the stud 431 and close to the other end of the stud 431. The adjusting nut 433 is screwed onto the stud 431 and away from the other end of the stud 431. The spring 434 is sleeved on the stud 431 and located between the adjusting nut 433 and the side wall of the U-shaped groove 32, and is in a compressed state. The other end of the outer curved spring plate 421 is sleeved on the stud 431 and located between the protective nut 432 and the adjusting nut 433.

[0053] Since the outer curved spring plate 421 is also compressed and has a tendency to extend, the other end of the outer curved spring plate 421 will press against the adjusting nut 433. Furthermore, since the spring 434 is compressed between the adjusting nut 433 and the side wall of the U-shaped groove 32, it will press against the adjusting nut 433 in the opposite direction. This prevents the adjusting nut 433 from loosening on the stud 431, thereby preventing changes in the natural frequency of the multi-frequency vibration damper and ensuring a continuous and stable vibration damping effect. The protective nut 432 is a defensive structure that prevents the other end of the outer curved spring plate 421 from detaching from the stud 431.

[0054] Specifically, as shown in Figures 1, 2, and 5, the steel strand bundle 2 includes two long steel strands 21, one short steel strand 22, and a steel wire 23. The left and right ends of the long steel strands 21 are respectively connected to the center of the bottom of the U-shaped groove 32. The short steel strand 22 is shorter than the long steel strands 21, and its two ends are free ends. The short steel strand 22 and the long steel strands 21 are tightly wound together by the steel wire 23. In this way, the friction area of ​​the steel strand bundle 2 can be easily changed by replacing the short steel strand 22 without disassembling the hammer head 3, further improving the inherent frequency adjustability of the multi-frequency vibration damper.

[0055] As shown in Figures 2 and 3, the end of the steel strand bundle 2 is hinged to the hammer head 3 by a ball joint 5. In this way, there will be relative swing between the hammer head 3 and the steel strand bundle 2, which further accelerates the vibration reduction and energy consumption.

[0056] Specifically, as shown in Figures 6 and 7, the clamp mechanism 1 includes a base 11, a connecting rod 12, a fixed pressure plate 13, a movable pressure plate 14, a mounting clamp 17, and a clamping clamp 18. The base 11 has a through hole 19 on its side for horizontally installing the steel strand bundle 2. The lower end of the connecting rod 12 is fixedly connected to the base 11, and the upper end is fixedly connected to the fixed pressure plate 13. The mounting clamp 17 is fixedly installed on the fixed pressure plate 13, and the clamping clamp 18 is fixedly installed on the movable pressure plate 14. The movable pressure plate 14 is installed on the fixed pressure plate 13 by connecting bolts 16 so that the clamping clamp 18 and the mounting clamp 17 cooperate to clamp and install on the power transmission line.

[0057] The base 11, connecting rod 12, fixed pressure plate 13, and hanging clamp 17 can be integrally cast, as can the movable pressure plate 14 and clamping clamp 18. The hanging clamp 17 can be semi-circular or 3 / 5 circular, and the corresponding clamping clamp 18 can be semi-circular or 2 / 5 circular, together clamping the power transmission line. When the hanging clamp 17 is 3 / 5 circular, it can be first hung on the power transmission line during installation, and then the movable pressure plate 14 can be installed onto the fixed pressure plate 13 using connecting bolts 16, facilitating high-altitude operations.

[0058] Furthermore, a spacer block 15 is provided between the fixed pressure plate 13 and the movable pressure plate 14. The spacer block 15 creates a gap between the fixed pressure plate 13 and the movable pressure plate 14, and between the mounting clamp 17 and the clamping clamp 18. The spacer block 15 is fixedly mounted to the fixed pressure plate 13, the movable pressure plate 14, or the connecting rod 12. The spacer block 15 makes the connection between the fixed pressure plate 13 and the movable pressure plate 14 more stable, that is, the clamping between the mounting clamp 17 and the clamping clamp 18 is more stable, thereby clamping the power transmission line more stably.

[0059] The above are merely preferred embodiments of this application. It should be noted that, for those skilled in the art, several structural changes or improvements can be made without departing from the principles of this application, and these changes or improvements should also be considered within the scope of protection of this application.

Claims

1. A multi-frequency vibration damper for power transmission conductors, comprising a clamp mechanism (1), a steel strand bundle (2), and two hammer heads (3), wherein the upper part of the clamp mechanism (1) is used to hang and clamp the power transmission conductor, the steel strand bundle (2) is installed horizontally through the lower part of the clamp mechanism (1), one of the hammer heads (3) is installed at the left end of the steel strand bundle (2), and the other hammer head (3) is installed at the right end of the steel strand bundle (2), the two hammer heads (3) are arranged opposite to each other, and the tail of the hammer head (3) is provided with a U-shaped groove (32), the bottom of the U-shaped groove (32) correspondingly connecting to the end of the steel strand bundle (2), characterized in that: At least one energy-consuming component (4) is provided in the U-shaped groove (32). The energy-consuming component (4) includes a mounting plate (41), a bending energy-consuming component (42), and an adjustment component (43). The mounting plate (41) is fixed on the steel strand bundle (2), and the adjustment component (43) is installed on the side wall of the U-shaped groove (32). The bending energy dissipation component (42) is C-shaped and includes an outer bending spring plate (421), a friction plate (423), and an inner bending spring plate (422) that are tightly attached from the outside to the inside. The outer bending spring plate (421), the friction plate (423), and the inner bending spring plate (422) are all C-shaped. One end of the outer bending spring plate (421) is fixed to the end of the mounting plate (41), and the other end is connected to the adjustment component (43). The friction plate (423) and the inner bending spring plate (422) are both located in the C-shaped bending cavity of the outer bending spring plate (421). The bending degree of the bending energy dissipation component (42) can be adjusted by the adjustment component (43).

2. The multi-frequency vibration damper for power transmission lines according to claim 1, characterized in that: A limiting plate (424) is provided in the C-shaped bending cavity of the outer bending spring plate (421). The limiting plate (424) is used to limit the inner bending spring plate (422) and the friction plate (423) within the C-shaped bending cavity of the outer bending spring plate (421).

3. The multi-frequency vibration damper for power transmission lines according to claim 1, characterized in that: The outer surface of the friction plate (423) is rough and the coefficient of friction is 0.40~0.50, or / and the inner surface of the friction plate (423) is rough and the coefficient of friction is 0.35~0.

45.

4. The multi-frequency vibration damper for power transmission lines according to claim 1, characterized in that: The adjustment assembly (43) includes a stud (431), a protective nut (432), an adjusting nut (433), and a spring (434). One end of the stud (431) is fixed to the side wall of the U-shaped groove (32). The protective nut (432) is screwed onto the stud (431) and close to the other end of the stud (431). The adjusting nut (433) is screwed onto the stud (431) and away from the other end of the stud (431). The spring (434) is compressed and sleeved on the stud (431) and located between the adjusting nut (433) and the side wall of the U-shaped groove (32). The other end of the outer curved spring plate (421) is sleeved on the stud (431) and located between the protective nut (432) and the adjusting nut (433).

5. The multi-frequency vibration damper for power transmission lines according to claim 1, characterized in that: The U-shaped groove (32) is provided with two energy-consuming components (4), which are symmetrically arranged on both sides of the steel strand cluster (2).

6. The multi-frequency vibration damper for power transmission lines according to claim 1, characterized in that: The steel strand bundle (2) includes at least one long steel strand (21), at least one short steel strand (22) and a steel wire (23). The two ends of the long steel strand (21) are respectively connected to the hammer head (3). The length of the short steel strand (22) is shorter than the length of the long steel strand (21). The two ends of the short steel strand (22) are free ends. The short steel strand (22) and the long steel strand (21) are wrapped and tightened by the steel wire (23).

7. The multi-frequency vibration damper for power transmission lines according to claim 1 or 6, characterized in that: The end of the steel strand bundle (2) is hinged to the hammer head (3) by a ball joint (5).

8. The multi-frequency vibration damper for power transmission lines according to claim 1, characterized in that: The wire clamp mechanism (1) includes a base (11), a connecting rod (12), a fixed pressure plate (13), a movable pressure plate (14), a hanging clamp (17), and a clamping clamp (18). The base (11) has a through hole (19) on its side for horizontally installing the steel strand bundle (2). The lower end of the connecting rod (12) is fixed to the base (11), and the upper end is fixed to a fixed pressure plate (13). The hanging clamp (17) is fixed to the fixed pressure plate (13), and the clamping clamp (18) is fixed to the movable pressure plate (14). The movable pressure plate (14) is installed on the fixed pressure plate (13) by connecting bolts (16) so that the clamping clamp (18) and the hanging clamp (17) cooperate to clamp and install on the power transmission line.

9. The multi-frequency vibration damper for power transmission lines according to claim 8, characterized in that: A partition block (15) is provided between the fixed pressure plate (13) and the movable pressure plate (14). The partition block (15) provides a gap between the fixed pressure plate (13) and the movable pressure plate (14), and between the hanging clamp (17) and the clamping clamp (18). The partition block (15) is fixedly mounted on the fixed pressure plate (13), the movable pressure plate (14), or the connecting rod (12).

10. The multi-frequency vibration damper for power transmission lines according to claim 1, characterized in that: The hammer head (3) is cylindrical, the U-shaped groove (32) is symmetrically arranged along the axis of the hammer head (3), the head of the hammer head (3) is provided with a counterweight groove (31), and the end face of the head of the hammer head (3) is a spherical arc surface.

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