An asymmetric wire vibration damper

Abstract

This utility model belongs to the field of high-voltage power line erection technology, specifically relating to an asymmetric power line vibration damper. It includes a clamp, with hammers of different masses connected to both sides of the clamp by steel strands. The distances from the hammers to the clamp are also unequal, with the heavier hammers having a greater distance and the lighter hammers a shorter distance. The clamp includes a grip and a locking nut. The grip has tapered ends with external threads. Each grip is divided into two arc-shaped plates that can be fastened onto the power line, with a tension gap between them. The locking nut is an open ring that can be fitted onto the power line through the opening. The locking nut has a tapered internal threaded hole that can engage with the tapered ends. The two locking nuts are tightened at both ends of the grip, clamping and fixing the two arc-shaped plates onto the power line. One of the arc-shaped plates is connected to the steel strands via a support arm. The advantage of this utility model is that it can provide four fixed frequencies, offering a wide frequency range.

Description

Technical Field

[0001] This utility model belongs to the field of high-voltage power line erection technology, specifically relating to an asymmetric power line vibration damper. Background Technology

[0002] High-voltage overhead lines have long spans and tall towers, causing strong vibrations in the conductors when exposed to strong winds. The working conditions at the conductor suspension point are most unfavorable during this vibration. Prolonged and periodic vibrations can cause conductor fatigue damage, leading to strand breakage and wire breakage. Sometimes, strong vibrations can even damage hardware and insulators. To prevent and mitigate conductor vibration, vibration dampers are installed near the conductor suspension clamps. In use, the damper is fixed to the steel strand using a clamping plate at its upper end. After installation, when the conductor vibrates, the damper moves up and down, generating a force asynchronous with or even opposite to the conductor vibration, thus eliminating or weakening the vibration and providing vibration protection. However, currently used vibration dampers have only one or two natural frequencies. Since the frequency range of conductor vibration caused by light winds is wide, one or two natural frequencies cannot adequately cover the excitation frequency, thus limiting their effectiveness in protecting the power lines. Furthermore, current vibration dampers are fixed to steel strands using clamping plates, which result in uneven force exerted on the steel strands by the clamping plates, affecting the vibration interaction between the steel strands and the vibration damper head. Utility Model Content

[0003] This invention aims to solve the problems of narrow vibration frequency range and unstable vibration transmission in existing vibration dampers.

[0004] This utility model provides the following technical solution: an asymmetric wire vibration damper, including a clamp, with hammers of different masses connected to both sides of the clamp by steel strands, and the distances from the hammers on both sides to the clamp are also unequal, with the larger hammers being farther from the clamp and the smaller hammers being closer to the clamp.

[0005] Furthermore, the clamp includes a gripping sleeve and a locking nut. The two ends of the gripping sleeve are tapered, with external threads engraved on the tapered ends. The gripping sleeve is divided into two arc-shaped plates, which can be fastened onto the wire. A tension gap is reserved between the two arc-shaped plates. The locking nut is an open ring, which can be slipped onto the wire through the opening. The locking nut has a tapered internal threaded hole that can engage with the tapered ends. The two locking nuts are tightened at both ends of the gripping sleeve, so that the two arc-shaped plates are clamped and fixed onto the wire. One of the arc-shaped plates is connected to the steel strand through a support arm.

[0006] Furthermore, on the mating surfaces of the two curved plates, one mating surface is provided with a pin, and the other mating surface is provided with a pin hole, with the pin and pin hole slidingly inserted into each other.

[0007] Furthermore, the hammer head is U-shaped, with the U-shaped opening facing the clamp, the bottom of the U-shaped opening connected to the steel strand, and isolation seams set between the two sides of the U-shaped opening and the steel strand.

[0008] Compared with the prior art, the advantages of this utility model are: The advantages of this invention are that the anti-vibration hammer uses hammers of different masses at both ends, and the steel strands suspending the hammers on both sides are also of unequal length. With this structure, four fixed frequencies can be obtained, which has a wide range of applicable frequencies and can be used in various vibration locations. The hammers are cast in a U-shape, hot-dip galvanized, and have an open tuning fork shape to prevent the hammers from rubbing against the steel strands during high-frequency vibration. At the same time, rainwater will not accumulate and cause rust, resulting in a longer service life. This achieves the effect of "safety, high efficiency, and low cost". Attached Figure Description

[0009] Figure 1 A 3D view of an asymmetric electrical wire vibration damper; Figure 2 A front perspective view of an asymmetric wire vibration damper; Figure 3 A bottom view of an asymmetric wire vibration damper; Figure 4 This is a schematic diagram of the fit between the pin and the pin hole.

[0010] In the diagram: 1-steel strand; 2-hammer head; 3-locking nut; 4-conical end; 5-arc plate; 6-conical internal thread hole; 7-support arm; 8-pin; 9-pin hole. Detailed Implementation

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] like Figures 1-4 An asymmetric wire vibration damper includes a clamp, on both sides of which are connected by steel strands 1 to hammers 2 of different masses. The distances from the hammers 2 to the clamp are also unequal, with the larger hammers 2 being farther from the clamp and the smaller hammers 2 being closer to the clamp.

[0013] The clamp includes a grip sleeve and a locking nut 3. The grip sleeve has tapered ends 4 at both ends, with external threads engraved on the tapered ends 4. The grip sleeve is divided into two arc-shaped plates 5, which can be fastened onto the wire. A tension gap is provided between the two arc-shaped plates 5. The locking nut 3 is an open ring that can be slipped onto the wire through the opening. The locking nut 3 has a tapered internal threaded hole 6 that can engage with the tapered ends 4. The two locking nuts 3 are tightened at both ends of the grip sleeve, clamping and fixing the two arc-shaped plates 5 onto the wire. One of the arc-shaped plates 5 is connected to the steel strand 1 via a support arm 7. The clamp adopts a structure of a grip sleeve (split arc-shaped plates) combined with tapered ends 4 and locking nuts 3. When the locking nuts 3 at both ends are tightened, the tapered end 4 engages with the tapered internal threaded hole 6 of the locking nut 3, which can evenly and stably apply radial clamping force to the split arc plate, ensuring a more uniform distribution of contact pressure between the entire arc surface and the wire, avoiding excessive local stress that could damage the wire or cause unstable clamping. The uniform clamping force ensures that vibration energy can be transmitted more smoothly and reliably from the wire through the clamp to the steel strand 1 and the hammer head 2, reducing energy transfer loss or abnormal vibration caused by uneven clamping, and making the response of the vibration damper more in line with design expectations.

[0014] On the mating surfaces of the two arc-shaped plates 5, one mating surface is provided with a pin 8, and the other mating surface is provided with a pin hole 9. The pin 8 and the pin hole 9 are slidably inserted into each other. The sliding insertion design of the pin 8 and the pin hole 9 on the mating surfaces of the arc-shaped plates 5 effectively prevents relative misalignment or torsion of the two arc-shaped plates 5 during installation and operation, further ensuring the stability of clamping and the consistency of vibration transmission path.

[0015] The hammer head 2 is U-shaped, with the U-shaped opening facing the clamp. The bottom of the U-shaped opening is connected to the steel strand 1, and isolation gaps are set between the two sides of the U-shaped opening and the steel strand 1. This effectively prevents the hammer head 2 from rigidly colliding or rubbing against the steel strand 1 when it swings violently or a large distance, reducing the risk of wear and abnormal noise, and improving operational reliability and service life.

[0016] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An asymmetrical electric line anti-chattering hammer, characterized by: The clamp is provided with steel strands (1) connecting hammers (2) of different masses on both sides of the clamp. The distances from the hammers (2) to the clamp are also different. The hammers (2) with larger masses are farther from the clamp, while the hammers (2) with smaller masses are closer to the clamp. The clamp includes a grip and a locking nut (3). The two ends of the grip are tapered ends (4). The tapered ends (4) are engraved with external threads. The grip is divided into two arc plates (5). The two arc plates (5) can be fastened to the wire. A tension gap is reserved between the two arc plates (5). The locking nut (3) is an open ring. The locking nut (3) can be put on the wire from the opening. The locking nut (3) has a tapered internal thread hole (6) that can be screwed into the tapered end (4). The two locking nuts (3) are tightened at both ends of the grip to clamp and fix the two arc plates (5) to the wire. One of the arc plates (5) is connected to the steel strand (1) through the support arm (7).

2. An asymmetrical corded balun according to claim 1, wherein: On the mating surfaces of the two arc-shaped plates (5), one of them is provided with a pin (8) and the other is provided with a pin hole (9). The pin (8) and the pin hole (9) are slidably inserted into each other.

3. An asymmetrical wire anti-chuck according to claim 1, wherein: The hammer head (2) is U-shaped, with the U-shaped opening facing the clamp. The bottom of the U-shaped opening is connected to the steel strand (1), and an isolation seam is provided between the two sides of the U-shaped opening and the steel strand (1).

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