An overhead line vibration reduction device, a vibration damper, a spacer and a double-swing anti-hopping device

Abstract

The present application relates to a kind of overhead line damping device and anti-vibration hammer, spacer and double swing dancer, damping device includes: shell, spring and mass, wherein, the mass is fixed on the central axis inside shell by spring, the shell is filled with damping liquid inside;The present application utilizes damping liquid to consume the energy generated by main vibration body, enhances the damping effect of damping device, and the damping device is simple in structure, easy to install, and can be combined with existing anti-vibration hammer, spacer and double swing dancer etc., with universality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power grid disaster prevention and mitigation, in particular to an overhead line vibration reduction device, a vibration damper, a spacer and a double pendulum anti-dancer. BACKGROUND

[0002] Overhead power lines are erected in the wild and are affected by weather conditions, resulting in vibration and dancing, which can easily cause inter-phase flashover, line tripping, power outage or conductor burn, and other serious accidents. Wind-induced vibration is one of the common causes of overhead conductor vibration. Wind-induced vibration includes various types such as micro-wind vibration, sub-span oscillation and dancing. Currently, wind vibration control work mainly relies on vibration dampers. Due to the various forms of wind-induced vibration, the design forms of vibration dampers are also different.

[0003] In the prior art, different vibration reduction devices are designed for different types of vibration, such as spacers, vibration dampers and double pendulum anti-dancers. The production and manufacturing of the above vibration reduction devices are different and do not have universality, which brings many inconveniences to the design, management, operation and maintenance of the power transmission line.

[0004] The above conventional vibration dampers are mostly designed to change the distribution stiffness, mass or torsional inertia of the conductor unit at the location, and have low energy conversion rate of the conductor. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide a more effective vibration reduction device for suppressing conductor vibration, which can be used in combination with the vibration dampers, spacers and double pendulum anti-dancers in the prior art.

[0006] The purpose of the present application is achieved by using the following technical solutions:

[0007] The present application provides an overhead line vibration reduction device, which is improved in that the device comprises a shell 11, a spring and a mass block 12, wherein the mass block 12 is fixed to the central axis inside the shell 11 by the spring, and the inside of the shell 11 is filled with damping liquid 13.

[0008] Preferably, the shell 11 is a cylinder.

[0009] Preferably, the shell 11 is made of metal.

[0010] Preferably, the mass block 12 is spherical.

[0011] Preferably, the number of springs is at least 2, and the number of springs is an even number, and the springs are symmetrically distributed around the mass block 12.

[0012] Preferably, the spring is a cylindrical spring.

[0013] Preferably, the damping liquid 13 is an anti-freezing damping liquid 13.

[0014] Preferably, the damping liquid 13 is filled in an amount of 50% to 80%.

[0015] Based on the same inventive concept, the application further provides a damping damper based on an overhead line vibration reduction device, which is improved in that the damping damper comprises a clamping piece 2, a suspender 3, a connecting rod 4 and at least two vibration reduction devices 1, the clamping piece 2 is connected to one end of the suspender 3, the other end of the suspender 3 is vertically connected to the midpoint of the connecting rod 4, and the at least two vibration reduction devices 1 are arranged on the connecting rod 4.

[0016] Based on the same inventive concept, the application further provides a spacer based on an overhead line vibration reduction device, which is improved in that the vibration reduction device 1 is embedded into a preset opening of a support frame 5 of the spacer.

[0017] Based on the same inventive concept, the application further provides a double-swing anti-hopping device based on an overhead line vibration reduction device, which is improved in that the pendulum of the double-swing anti-hopping device is the vibration reduction device 1.

[0018] Compared with the closest prior art, the application has the beneficial effects that:

[0019] The overhead line vibration reduction device provided by the application comprises a shell 11, a spring and a mass block 12, the mass block 12 is fixed on a central axis in the shell 11 by the spring, and the shell 11 is filled with a damping liquid 13; the damping liquid 13 is used to consume the energy generated by a main vibration body, thereby enhancing the vibration reduction effect of the vibration reduction device 1, and the vibration reduction device 1 has the advantages of simple structure, convenient installation, combination with existing damping dampers, spacers and double-swing anti-hopping devices, and strong universality; in the vibration reduction device 1, the spring-mass structure composed of the spring and the mass block 12 has a certain geometric nonlinearity, can generate a larger response under a non-resonance frequency, increases the mechanical energy of the main vibration body transferred to the vibration reduction device 1, has a higher conversion rate of the vibration energy of the conductor, further enhances the vibration reduction effect, better protects the power transmission conductor and fittings, and improves the stability of the power transmission line. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a basic structure diagram of the vibration reduction device;

[0021] Figure 2 is a corresponding curve diagram of different types of vibration reduction designs;

[0022] Figure 3 is a structure diagram of a damping damper based on an overhead line vibration reduction device;

[0023] Figure 4 is another structure diagram of a damping damper based on an overhead line vibration reduction device;

[0024] Figure 5 It is a spacer rod based on the vibration reduction device of the overhead line;

[0025] Figure 6 It is a double pendulum anti-dance device based on the overhead line vibration reduction device;

[0026] In the figure, 1-vibration reduction device, 11-housing, 12-mass block, 13-damping fluid, 14-first spring, 15-second spring, 16-third spring, 17-fourth spring, 2-clamping member, 3-suspender rod, 4-connecting rod, 5-support frame, 6-connecting plate. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0029] Example 1

[0030] The present invention provides an overhead line vibration reduction device, such as Figure 1 As shown, the device includes: a housing 11, a spring and a mass block 12, wherein the mass block 12 is fixed on the central axis inside the housing 11 through the spring, and the housing 11 is filled with a damping fluid 13.

[0031] One end of the spring is connected to the interior of the housing 11, and the other end is connected to the mass 12, which is located at the central axis of the interior of the housing 11. Specifically, the mass 12 is connected to the center of the interior of the housing 11 via the spring. Connectors are used to connect the interior of the housing 11 to the spring, and between the spring and the mass 12.

[0032] As a preferred implementation of Example 1 of the present invention, the shell 11 is a cylinder.

[0033] Those skilled in the art will appreciate that the housing 11 may also be in other shapes such as a cuboid.

[0034] As a preferred implementation of Example 1 of the present invention, the housing 11 is made of metal.

[0035] Specifically, the housing 11 is made of corrosion-resistant metal.

[0036] As a preferred implementation of Example 1 of the present invention, the mass block 12 is spherical.

[0037] As a preferred implementation of Example 1 of the present invention, the number of the springs is at least 2, and the number of the springs is an even number, and the springs are symmetrically distributed around the mass block 12.

[0038] like Figure 1 As shown, the lengths and spring coefficients of the first spring 14 and the first spring 15 are equal; the lengths and spring coefficients of the third spring 16 and the fourth spring 17 are equal; the springs are arranged as the first spring 14, the first spring 15, the third spring 16 and the fourth spring 17, and the first spring 14 and the first spring 15 are arranged on the axis of the housing 11, and the straight line where the third spring 16 and the fourth spring 17 are located is perpendicular to the axis.

[0039] As a preferred implementation of Example 1 of the present invention, the spring is a cylindrical spring.

[0040] Specifically, the cylindrical spring is made of high-strength alloy material.

[0041] As a preferred implementation of Example 1 of the present invention, the damping fluid 13 is an antifreeze damping fluid 13.

[0042] As a preferred implementation of Example 1 of the present invention, the filling amount of the damping fluid 13 is 50% to 80%.

[0043] The vibration reduction device provided in Example 1 of the present invention has the following effects:

[0044] like Figure 2 As shown, when the conductor of the overhead line vibrates, due to the certain geometric nonlinear effect of the vibration reduction device structure, compared with the linear spring in the prior art, the response of the vibration reduction device at the non-resonance frequency can also be improved to a certain extent, generating amplitude in a larger frequency range, thereby improving the vibration reduction effect.

[0045] The springs are distributed around the mass block 12 , the number of the springs is at least 2, and the number of the springs is an even number, and the springs are symmetrically distributed around the mass block 12 .

[0046] This arrangement allows the vibration damping device to absorb conductor energy and vibrations. The mass 12 within the device is guided by multiple springs, distributing the force to each spring. Compared to a vibration damping device with springs distributed only axially, this distribution absorbs more energy and better suppresses conductor vibrations. In this embodiment, an even number of springs are symmetrically distributed around the mass 12. This symmetrical distribution improves energy conversion.

[0047] When the mass 12 is spherical, the mass distribution is more uniform, and the springs connected to the mass 12 can more closely approximate the average distribution of the force on the mass 12.

[0048] The housing 11 of the damping device can protect the internal springs and mass 12 and prevent the damping liquid 13 from leaking. The housing 11 is in the shape of a cylinder, which is simple in structure and convenient for production and processing. Since the damping device needs to work in an open-air environment, the housing 11 is made of a corrosion-resistant metal material, which can effectively resist the erosion of rain and snow and prolong the service life of the damping device.

[0049] In order to better suppress the conductor vibration, a dynamic damping technology containing nonlinear stiffness and viscoelastic damping characteristics is introduced.

[0050] During the wind vibration of the conductor, the springs and the mass 12 produce a response to perform a large-amplitude movement and strike the damping liquid 13 in the housing 11, so that the mechanical energy of the spring vibrator is converted into the internal energy of the damping liquid 13, further consuming the energy of the conductor vibration, and playing a better role in suppressing the conductor vibration. The damping liquid 13 is an anti-freezing damping liquid 13 that can maintain a liquid state from minus 30 degrees Celsius to plus 70 degrees Celsius.

[0051] When the mass 12 moves, the damping liquid 13 is struck by the mass 12 and moves in the housing, and heat is generated with the striking of the mass 12. Considering the space required for the movement of the damping liquid 13 and the space required for thermal expansion, the filling amount of the damping liquid 13 is 50% to 80%, of which 50% is optimal.

[0052] The damping device is simple in structure, easy to install, and can be used in combination with existing anti-vibration hammers, spacer rods, and double-pendulum anti-dancing devices, etc., and has universality. In addition, the device not only converts and consumes energy, but also can improve the damping of the conductor itself and improve the wind resistance and vibration resistance of the split conductor.

[0053] Example 2

[0054] An anti-vibration hammer based on an overhead line damping device, the anti-vibration hammer comprising a clamping piece 2, a boom 3, a connecting rod 4, and at least two damping devices, the clamping piece 2 being connected to one end of the boom 3, the other end of the boom 3 being vertically connected to the midpoint of the connecting rod 4, and the at least two damping devices being arranged on the connecting rod 4.

[0055] As shown in Figure 3 the clamping piece 2 is used to clamp on the conductor, and the mass 12 of the damping device at both ends of the connecting rod 4 and the connecting rod 4 are at the same height. The first spring 14 and the first spring 15 of the damping device at both ends of the connecting rod 4 are parallel to the horizontal plane, and the third spring 16 and the fourth spring 17 are perpendicular to the horizontal plane.

[0056] The connecting rod 4 is made of steel strand, and the clamping piece 2 is vertically connected to the midpoint of the steel strand through the suspender 3. The damping device is installed at both ends of the steel strand, and the damping device is welded with the steel strand.

[0057] In the prior art, the hammer head of the damper is a metal hammer head. When the damper has a light weight, the damping effect cannot be achieved, but when the damper has a heavy weight, the conductor is prone to fatigue or a new wave node is formed at the installation position. The damper provided in Embodiment 2 of the present application replaces the ordinary metal hammer head with the damping device, which can change the damping of the conductor itself, reduce the weight, delay the fatigue of the conductor, and better protect the conductor and hardware of the overhead line.

[0058] Embodiment 3

[0059] The difference between the present embodiment and Embodiment 2 described above lies in that the connecting rod 4 is horizontally connected with multiple damping devices, and the mass block 12 in the damping device gradually increases in radius from the edge to the center.

[0060] As shown in Figure 4 , the multiple damping devices are connected to form the connecting rod 4, and the suspender 3 is vertically connected to the middle part of the multiple damping devices.

[0061] The damper provided in Embodiment 3 of the present application uses multiple damping devices, and the resonance frequencies of the damping devices are different, so that the frequency range of the damper for damping can be expanded. The mass block 12 gradually increases in radius from the edge to the center, the vibration centers of the multiple dampers are concentrated in the middle, so that the structure of the damper is more stable, and the damper can adapt to high-strength vibration of the conductor.

[0062] Embodiment 4

[0063] A spacer based on an overhead line damping device, wherein the damping device is embedded into a preset opening of a support frame 5 of the spacer.

[0064] As shown in Figure 5 , the support frame 5 of the spacer is a polygon, each side of the support frame 5 is provided with an opening capable of accommodating the damping device, and the damping device is connected to the opening.

[0065] The spacer provided in Embodiment 4 of the present application can increase the damping of the spacer by installing the damping device in the opening of the support frame 5 of the spacer, so that the spacer can better absorb vibration energy, suppress the wind vibration, and effectively prevent damage to the conductor caused by the vibration of the spacer.

[0066] Embodiment 5

[0067] A double-swing anti-dancing device based on an overhead line damping device, wherein the pendulum of the double-swing anti-dancing device is the damping device.

[0068] AsFigure 6 As shown: the double-swing dancer includes a spacer rod, a connecting plate 6 and a damping device, the connecting plate 6 is inverted V-shaped, one end of the upper end is connected with the spacer rod, and the lower end is connected with a plurality of connected damping devices.

[0069] The double-swing dancer provided by the embodiment 5 of the present application replaces the ordinary metal pendulum with the damping device, so as to increase the damping of the double-swing dancer and inhibit the conductor vibration.

[0070] In summary, the overhead line damping device provided by the present application comprises a shell, a spring and a mass block, the mass block is fixed on the central shaft in the shell through the spring, and the shell is filled with damping liquid; the damping liquid is used to consume the energy generated by the main vibration body, so as to enhance the damping effect of the damping device, and the damping device has simple structure, is convenient to install, can be combined with the existing damping hammer, spacer rod and double-swing dancer, and has strong universality.

[0071] In the damping device, the spring-mass block structure composed of the spring and the mass block has certain geometric nonlinearity, can generate larger response under the frequency in the non-resonance region, increases the mechanical energy of the main vibration body transferred to the damping device, has higher conversion rate of the conductor vibration energy, further enhances the damping effect, better protects the power transmission conductor and fittings, and improves the stability of the power transmission line.

[0072] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system or a computer program product. Therefore, the present application can adopt a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can adopt a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes.

[0073] The present application is described with reference to flowcharts and / or block diagrams according to the methods, devices (systems) and computer program products of the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one flow or multiple flows and / or blocks Figure 1 The device that implements the functions specified in one flow or multiple flows and / or blocks.

[0074] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the flow Figure 1 The functions specified in the flow or flows and / or blocks Figure 1 The functions specified in the flow or flows and / or blocks

[0075] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flow Figure 1 The functions specified in the flow or flows and / or blocks Figure 1 The functions specified in the flow or flows and / or blocks

[0076] Finally, it should be noted that the above-mentioned embodiments are merely used to illustrate the technical solutions of the present application, rather than limit the present application. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application, and any modification or equivalent replacement should be covered in the protection scope of the claims of the present application.

Claims

1. A damper for an overhead line vibration reduction device, characterized by The anti-vibration hammer comprises a clamping piece (2), a boom (3), a connecting rod (4) and a plurality of damping devices (1), the clamping piece (2) is connected to one end of the boom (3), the other end of the boom (3) is vertically connected to the midpoint of the connecting rod (4), and the plurality of damping devices (1) are horizontally connected and arranged on the connecting rod (4); The damping device comprises a shell (11), a spring and a mass block (12), wherein the mass block (12) is fixed on the central axis in the shell (11) by the spring, and the shell (11) is filled with damping liquid (13); the shell (11) is a cylinder; the shell (11) is made of metal; the mass block (12) is spherical; the number of springs is at least two, and the number of springs is an even number, the springs are symmetrically distributed around the mass block (12); the spring is a cylindrical spring; the damping liquid (13) is an anti-freezing damping liquid (13); the filling amount of the damping liquid (13) is 50%-80%; Wherein, from the edge to the center of the connecting rod (4), the radius of the mass block (12) in each damping device gradually increases.

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