Large-span wire anti-vibration device for overhead transmission line design

Abstract

The utility model discloses a large-span wire anti-vibration device for overhead transmission line design, which comprises a wire clamp, the outer edge of the wire clamp is fixedly connected with a connecting part, one end, far away from the wire clamp, of the connecting part is fixedly connected with a mounting rod, two ends of the mounting rod are fixedly connected with connecting rods, and the connecting rods are fixedly connected with the wire clamp. The ends, away from the mounting rod, of the two connecting rods are fixedly connected with vibration reduction cylinders, the two vibration reduction cylinders are each sleeved with a plurality of detachable balancing weights, the two vibration reduction cylinders are each sleeved with a cylinder cover in a threaded mode, and the inner faces of the two vibration reduction cylinders are each slidably connected with a damping vibration reduction core. According to the lead anti-vibration device, the traditional mode that vibration reduction is carried out only through an anti-vibration hammer is solved, the vibration reduction effect on the lead is improved, normal work of the lead is guaranteed, the service life of the lead is prolonged, construction operators can flexibly adjust the number of the balancing weights, the weight of the two vibration reduction cylinders is changed, and the vibration reduction effect of the lead is improved. And the function of adjusting the damping effect according to actual requirements is achieved.

Description

Technical Field

[0001] This utility model relates to the field of power transmission line technology, and in particular, to a vibration damping device for long-span conductors in the design of overhead power transmission lines. Background Technology

[0002] In real-world engineering, when an overhead transmission line conductor is subjected to an uneven and unstable breeze blowing vertically towards it, an airflow vortex that alternates up and down at a certain frequency is formed behind the conductor. This causes the conductor to be subjected to an alternating pulse force. When the alternating frequency of the airflow vortex is equal to the natural frequency of the conductor, the conductor resonates in the vertical plane, causing conductor vibration. The conductor vibration causes the conductor to bend repeatedly at the clamp exit, leading to material fatigue and eventually strand breakage or wire breakage accidents. This poses a significant threat to the normal and safe operation of the line, especially in long-span transmission lines, where the situation is even more serious.

[0003] Existing technologies use vibration dampers to solve the above problems. Vibration dampers generally include clamps, steel strands, and weights. Their vibration damping principle is as follows: when the conductor vibrates, the clamps move up and down with the conductor. Due to the large inertia of the weights at both ends, they cannot move synchronously with the clamps, causing the steel strands of the vibration damper to bend up and down continuously. The damping effect of the weights reduces the amplitude of the vibration, while the deformation of the steel-cored aluminum strands and the friction between the strands consume the energy transmitted to them by the conductor vibration, thereby reducing the vibration of the conductor. Since the vibration damping effect of the vibration damper is closely related to the weight of the weights, the weight of the vibration damper must be appropriate. If it is too light, the vibration damping effect will be poor; if it is too heavy, it may form a new wave node at the installation location of the vibration damper. Moreover, relying solely on the weight of the weights has an unsatisfactory damping effect, thus affecting the vibration damping effect. Therefore, it is necessary to design a vibration damping device for long-span conductors in overhead transmission line design to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a vibration damping device for long-span conductors in overhead power transmission line design.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0006] A vibration damping device for long-span conductors in overhead power transmission line design includes a line clamp, a connecting part fixedly connected to the outer edge of the line clamp, an installation rod fixedly connected to the end of the connecting part away from the line clamp, connecting rods fixedly connected to both ends of the installation rod, vibration damping cylinders fixedly connected to the ends of the two connecting rods away from the installation rods, multiple detachable counterweights fitted on the two vibration damping cylinders, cylinder caps threaded onto the two vibration damping cylinders, and damping vibration damping cores slidably connected to the inner surfaces of the two vibration damping cylinders.

[0007] Furthermore, the inner surface of the wire clip is provided with anti-slip texture, and the wire clip and the mounting rod are jointly equipped with reinforcing ribs.

[0008] Furthermore, both of the two damping cylinders have threaded portions on their outer edges, and multiple counterweights are threadedly sleeved onto the two threaded portions respectively.

[0009] Furthermore, both damping cores are made of rubber material, and the outer edges of the two damping cores are respectively attached to the inner surfaces of the two damping cylinders.

[0010] Furthermore, the surfaces of the wire clip, connector, mounting rod, two connecting rods, two vibration damping cylinders, and two cylinder covers are all coated with a corrosion-resistant coating.

[0011] Furthermore, the connecting part is fixed to the middle of the connecting rod, and the two damping cylinders are symmetrically arranged along the middle of the connecting rod to maintain the stability of the center of gravity.

[0012] Furthermore, the counterweight has a ring structure and is provided with a positioning screw hole. A positioning screw is connected to the internal thread of the positioning screw hole to limit the stability of the counterweight on the outer wall of the vibration damping cylinder.

[0013] In summary, the beneficial technical effects of this utility model are as follows:

[0014] (1) By setting two damping vibration damping cores, when the conductor vibrates, the two damping cylinders will shake, which can reduce the vibration amplitude of the conductor, thereby playing a role in vibration reduction and protection of the conductor. Secondly, during the vibration of the two damping cylinders, the two damping vibration damping cores can shake inside the two damping cylinders. When the two damping cylinders vibrate, the vibration energy is consumed by the collision and friction between the damping vibration damping cores and the inner wall of the damping cylinder cavity, which further plays a role in vibration reduction of the conductor. This replaces the traditional method of vibration reduction by only using anti-vibration hammers, improves the vibration reduction effect on the conductor, ensures the normal operation of the conductor, and extends the service life of the conductor.

[0015] (2) By setting multiple counterweights, the staff can adjust the number of counterweights on the vibration damping cylinder according to the span of the conductor. Specifically, the counterweights are in the form of a ring structure and are installed on the vibration damping cylinder by means of threaded connection, which makes it convenient for the staff to flexibly adjust the number of counterweights, thereby changing the weight of the two vibration damping cylinders and playing the role of adjusting the vibration damping effect according to actual needs. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a vibration damping device for long-span conductors in overhead transmission line design proposed in this utility model.

[0017] Figure 2This is a schematic diagram of the internal structure of a vibration damping cylinder for a long-span conductor vibration damping device used in the design of overhead transmission lines, as proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the counterweight positioning structure of a vibration damping device for long-span conductors in overhead transmission line design, as proposed in this utility model.

[0019] In the diagram, 1. Cable clamp; 2. Connecting part; 3. Mounting rod; 4. Vibration damping cylinder; 5. Connecting rod; 6. Threaded part; 7. Counterweight block; 8. Cylinder cover; 9. Damping vibration damping core; 10. Anti-slip texture; 11. Reinforcing rib. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0021] Reference Figure 1 and Figure 2 This utility model discloses a vibration damping device for long-span conductors in power transmission line design. It includes a wire clamp 1. The specific fixing method between the wire clamp 1 and the conductor is a relatively mature existing technology and is not shown in the figure, nor will it be described in detail here. A connecting part 2 is fixedly connected to the outer edge of the wire clamp 1. An installation rod 3 is fixedly connected to the end of the connecting part 2 away from the wire clamp 1. Both ends of the installation rod 3 are coaxially fixedly connected to connecting rods 5. Vibration damping cylinders 4 are coaxially fixedly connected to the ends of the two connecting rods 5 away from the installation rods 3. Multiple detachable counterweights 7 are fitted onto each of the two vibration damping cylinders 4. These counterweights 7 are made of stainless steel, which can slow down the corrosion rate of the counterweights 7 by the external environment and extend their service life. A cylinder cover 8 is threaded onto each of the two vibration damping cylinders 4, and a damping vibration damping core 9 is slidably connected to the inner surface of each of the two vibration damping cylinders 4. The damping vibration damping core 9 is fixed inside the vibration damping cylinder 4 by the cylinder cover 8. In this embodiment, the connection points of the wire clip 1, the connecting part 2, and the mounting rod 3 are fixed by welding; the connection points of the connecting part 2, the mounting rod 3, and the connecting rod 5 are fixed by welding; and the vibration damping cylinder 4 and the connecting rod 5 are fixed by welding.

[0022] In an optional embodiment, refer to Figure 1 The inner surface of the wire clip 1 is provided with anti-slip texture 10, which can increase the friction between the wire clip 1 and the wire and improve the connection stability between the wire clip 1 and the wire. The wire clip 1 and the mounting rod 3 are equipped with reinforcing ribs 11, which can improve the connection stability between the wire clip 1 and the mounting rod 3.

[0023] In an optional embodiment, refer to Figure 1-2Both shock absorbers 4 have threaded parts 6 on their outer edges, and multiple counterweights 7 are threaded onto the two threaded parts 6 respectively, which allows the staff to flexibly adjust the number of counterweights 7, thereby changing the weight of the shock absorber 4.

[0024] In an optional embodiment, refer to Figure 2 Both damping cores 9 are made of rubber material, and the outer edges of the two damping cores 9 are respectively attached to the inner surfaces of the two damping cylinders 4, so that the two damping cores 9 can fully absorb the energy generated during the movement.

[0025] In an optional embodiment, refer to Figure 1 The surfaces of the wire clip 1, connecting part 2, mounting rod 3, two connecting rods 5, two vibration damping cylinders 4 and two cylinder covers 8 are all sprayed with a corrosion-resistant coating (zinc plating is optional), which can slow down the corrosion rate of the device by the external environment.

[0026] In an optional embodiment, refer to Figure 3 To maintain a stable center of gravity, the connecting part 2 is fixed to the middle of the connecting rod 3. The two damping cylinders 4 are symmetrically arranged along the middle of the connecting rod 3. The counterweight 7 has a ring structure and is provided with a positioning screw hole 71. A positioning screw 72 is threaded into the positioning screw hole 71 to stabilize the counterweight 7 on the outer wall of the damping cylinder 4. The counterweight 7 is screwed into the designated position of the damping cylinder 4, and by tightening the positioning screw 72, the positioning screw 72 compresses and rubs against the damping cylinder 4, reducing the phenomenon of rotational displacement of the counterweight 7 during vibration under actual practical conditions, thereby further maintaining the stability of the center of gravity of the two damping cylinders.

[0027] The implementation principle of this embodiment is as follows: During use, the operator can install the device on the conductor using the wire clip 1. The specific fixing method between the wire clip 1 and the conductor is a relatively mature existing technology, which is not shown in the figure and will not be elaborated on here. When the conductor vibrates, the two damping cylinders 4 will shake, which can reduce the vibration amplitude of the conductor, thereby playing a role in vibration reduction and protection of the conductor. Secondly, during the vibration of the two damping cylinders 4, the two damping damping cores 9 can shake within the two damping cylinders 4. When the two damping cylinders 4 vibrate, the vibration energy is consumed by the collision and friction between the damping damping cores 9 and the inner wall of the cavity of the damping cylinder 4, further reducing the vibration of the conductor. Thus, it replaces the traditional method of vibration reduction using only anti-vibration hammers, improves the vibration reduction effect on the conductor, ensures the normal operation of the conductor, and extends the service life of the conductor.

[0028] Workers can adjust the number of counterweights 7 on the vibration damping cylinder 4 according to the span of the conductor. Specifically, the counterweights 7 have a ring structure and are installed on the vibration damping cylinder 4 by threaded connection, allowing workers to flexibly adjust the number of counterweights 7, thereby changing the weight of the two vibration damping cylinders 4 and adjusting the vibration damping effect on the conductor. In practical applications, the number of counterweights 7 is determined based on the span of the overhead conductor, the conductor type, and the average operating tension of the conductor. The installation distance of the vibration damping device is determined based on factors such as the conductor vibration wavelength, conductor outer diameter, conductor weight per unit length, conductor vibration wind speed, and conductor tension under minimum and maximum temperature conditions.

[0029] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A large span conductor anti-vibration device for overhead power transmission line design, characterized in that: The device includes a cable clip, a connecting part fixedly connected to the outer edge of the cable clip, an installation rod fixedly connected to the end of the connecting part away from the cable clip, connecting rods fixedly connected to both ends of the installation rod, vibration damping cylinders fixedly connected to the ends of the two connecting rods away from the installation rods, multiple detachable counterweights fitted on the two vibration damping cylinders, cylinder caps threaded onto the two vibration damping cylinders, and damping vibration damping cores slidably connected to the inner surfaces of the two vibration damping cylinders.

2. A large span conductor anti-vibration device for overhead power transmission line design according to claim 1, characterized in that: The inner surface of the wire clip has anti-slip texture, and the wire clip and the mounting rod are equipped with reinforcing ribs.

3. The anti-vibration device for large span conductor of overhead transmission line design according to claim 2, characterized in that: Both of the vibration damping cylinders have threaded portions on their outer edges, and multiple counterweights are threadedly sleeved onto the two threaded portions respectively.

4. The anti-vibration device for large span conductor of overhead transmission line design according to claim 3, characterized in that: Both damping cores are made of rubber material, and the outer edges of the two damping cores are respectively attached to the inner surfaces of the two damping cylinders.

5. The large span conductor vibration damper for overhead power line design according to claim 4, characterized in that: The surfaces of the cable clip, connector, mounting rod, two connecting rods, two vibration damping cylinders, and two cylinder covers are all coated with a corrosion-resistant coating.

6. The anti-vibration device for large span conductor of overhead transmission line design according to claim 5, characterized in that: The connecting part is fixed to the middle of the connecting rod, and the two damping cylinders are symmetrically arranged along the middle of the connecting rod to maintain the stability of the center of gravity.

7. The large span conductor vibration damper for overhead power line design according to claim 6, characterized in that: The counterweight has a ring structure and a positioning screw hole. A positioning screw is connected to the internal thread of the positioning screw hole to limit the stability of the counterweight on the outer wall of the vibration damping cylinder.

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