High-damping anti-galloping vibration reduction device

Abstract

The invention relates to the technical field of power transmission line galloping prevention and vibration reduction, in particular to a high-damping galloping prevention and vibration reduction device which comprises two connecting parts, an energy dissipation and vibration reduction part used for dissipating galloping energy of a power transmission line and an insulating part, and the bottom end of the energy dissipation and vibration reduction part is fixedly connected with the top end of the insulating part. The two connecting parts are fixedly connected to the top end of the energy dissipation and vibration reduction part and the bottom end of the insulation part respectively, and the two connecting parts are used for being connected with different-phase power transmission line clamps or spacers on the same group of power transmission lines. The method can effectively inhibit large-amplitude galloping of the power transmission line caused by wind load, icing falling load and the like, can effectively control different phase line gaps of the power transmission line, and guarantees safe and stable operation of the power transmission line.

Description

Technical Field

[0001] The invention relates to the technical field of anti-dancing and vibration reduction of transmission lines, and in particular to a high-damping anti-dancing and vibration reduction device. Background Art

[0002] With the rapid development of my country's economy and society, the construction scale of the national power grid is expanding, showing a trend of increasing the span of transmission lines, increasing the cross-section of conductors, and increasing the number of splits. During operation, transmission lines will inevitably encounter severe weather conditions such as low temperature, rain, snow, and strong winds, which will cause large-scale dancing of transmission lines. The dancing of transmission lines will cause electrical accidents and mechanical accidents such as line short circuits, flashover tripping, hardware wear, and tower collapse, causing the power grid to be paralyzed, seriously affecting the daily operation of the power grid, and having a serious impact on social and economic development. With the expansion of the scale of the transmission network, the situation of anti-galloping of transmission lines has become more severe. Research on measures to suppress the galloping of transmission lines has a broad market demand and is of great value in ensuring the safe and stable operation of the power grid in complex and harsh environments.

[0003] At present, the anti-dancing measures for transmission lines mainly involve installing anti-dancing devices on the transmission lines, such as spoiler anti-dancing devices, double pendulum anti-dancing devices, centralized anti-vibration hammers, spacers and other anti-dancing devices. Among them, spacers are a transmission line anti-dancing device that has been widely used in recent years due to their advantages such as high tensile strength, light weight, and pollution flashover resistance, especially in preventing transmission line adhesion. Spacers can suppress small-amplitude dancing of transmission lines caused by breezes to a certain extent, but due to their low damping, the vibration reduction effect is weak, especially in suppressing large-amplitude dancing of transmission lines caused by strong winds, ice shedding, etc., the effect is limited. At the same time, ordinary spacers are prone to adverse deformation, lack of energy dissipation capacity, and prone to fatigue, which can lead to damage to connecting hardware.

[0004] In summary, with respect to suppressing large-scale dancing of transmission lines, especially controlling the gap between phase lines when different phases of transmission lines are dancing, the existing technologies are insufficient and lack effective solutions. Summary of the invention

[0005] The purpose of the present invention is to provide a high-damping anti-dancing vibration reduction device to solve the technical problems existing in the above-mentioned background technology; it has good energy consumption capacity, can effectively suppress the large-scale dancing of transmission lines caused by wind loads, ice shedding loads, etc., and can also effectively control the gap between different phase lines of the transmission line to ensure the safe and stable operation of the transmission line. The device has the characteristics of simple structure, good durability, flexible installation, wide applicability, etc., and can effectively suppress the dancing of transmission lines.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A high-damping anti-dancing vibration reduction device comprises: a connecting component, an energy-absorbing vibration reduction component for dissipating the dancing energy of a transmission line, and an insulating component, wherein the bottom end of the energy-absorbing vibration reduction component is fixedly connected to the top end of the insulating component, and two connecting components are provided, and the two connecting components are respectively fixedly connected to the top end of the energy-absorbing vibration reduction component and the bottom end of the insulating component, and the two connecting components are used to connect to different phase transmission line clamps or spacer bars on the same group of transmission lines.

[0008] Furthermore, the connecting component includes: two upper and lower clamping rings connected to each other, the left and right ends of the upper and lower clamping rings are detachably fixedly connected by bolts, and the phase transmission line clamp or spacer rod is clamped and fixed between the upper and lower clamping rings.

[0009] Furthermore, the energy absorbing and vibration reducing components include: an energy absorbing and vibration reducing component 1, an energy absorbing and vibration reducing component 2, an upper connecting rod and a lower connecting rod. The energy absorbing and vibration reducing component 1 is detachably fixedly installed on the upper connecting rod to dissipate the small-amplitude dancing energy of the transmission line; the energy absorbing and vibration reducing component 2 is detachably fixedly installed between the upper connecting rod and the lower connecting rod to dissipate the large-amplitude dancing energy of the transmission line together with the energy absorbing and vibration reducing component 1.

[0010] Furthermore, the energy dissipation and vibration reduction component 1 includes: a viscoelastic ring and a mass ring, a circular through hole is opened in the middle position of the viscoelastic ring, an annular protrusion is arranged at the edge position of the outer end of the viscoelastic ring, and two arc-shaped recessed parts are symmetrically arranged between the circular through hole and the annular protrusion at the upper and lower ends of the viscoelastic ring; the mass ring is detachably fixedly connected to the annular protrusion on the viscoelastic ring; the upper connecting rod is arranged in two sections, wherein the upper top end of the upper half is fixedly connected to the bottom end of the upper connecting component, the lower part of the upper half is a screw and its size is smaller than the upper size of the upper half and smaller than the size of the circular through hole; a threaded hole is opened at the center position of the upper top end of the lower half, the lower part of the upper half movably passes through the circular through hole and is threadedly connected in the threaded hole, and the top and bottom ends of the viscoelastic ring are respectively pressed and contacted with the upper bottom end of the upper half and the upper top end of the lower half in the upper connecting rod.

[0011] Furthermore, the upper diameter of the upper half of the upper connecting rod is the same as the upper diameter of the lower half, and both are larger than the diameter of the circular through hole by 5 to 10 mm.

[0012] Furthermore, the mass ring includes: two clamping ring structures symmetrically arranged up and down, and two annular clamping grooves are symmetrically opened on the opposite sides of the two clamping rings, the sizes of the two annular clamping grooves respectively match the sizes of the annular protrusions on the viscoelastic ring, the two annular clamping grooves are respectively clamped at the upper and lower ends of the annular protrusions, and the outer ends of the two clamping rings are fixedly connected by a plurality of bolts.

[0013] Furthermore, the energy dissipation and vibration reduction component 2 includes: a viscoelastic rod and a shape memory alloy wire, the lower part of the lower half of the upper connecting rod is flange 1; the upper part of the lower connecting rod is flange 2, and a mounting circular groove is provided in the middle of the top end of flange 2, the diameter of the mounting circular groove matches the diameter of the viscoelastic rod, the bottom end of the viscoelastic rod is fixedly connected to the mounting circular groove, and the top end of the viscoelastic rod is in tight contact with flange 1; a plurality of shape memory alloy wires are provided, and the plurality of shape memory alloy wires are distributed in a circular array and are respectively stretched between flange 1 and flange 2; the bottom end of the lower part of the lower connecting rod is fixedly connected to the top end of the insulating component.

[0014] Furthermore, the insulating component is an insulator.

[0015] Furthermore, it also includes: a protective cover, which completely wraps the energy-absorbing and vibration-damping component one and the energy-absorbing and vibration-damping component two, and the top of the upper half of the upper connecting rod penetrates from bottom to top to the top of the protective cover and is tightly and fixedly connected to the protective cover; a through hole is opened in the middle of the bottom end of the protective cover, and the lower bottom end of the lower connecting rod slides through the through hole and extends to the bottom of the protective cover.

[0016] Furthermore, the protective cover is made of fiber-reinforced composite material.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Compared with common interphase spacers, the present invention adopts high damping viscoelastic material and shape memory alloy wire, has higher damping, and the device has good energy dissipation capacity during operation, can effectively dissipate the energy of the transmission line dancing, and quickly reduce the amplitude of the transmission line dancing.

[0019] 2. In the present invention, when the overall vibration of the transmission line is small, the mass ring in the energy-absorbing and vibration-reducing component produces movement in the opposite direction to the dancing of the transmission line, which can effectively suppress the overall dancing of the transmission line; when the transmission line dances to a large extent, especially when the dancing of transmission lines of different phases is relatively large, the viscoelastic rods and shape memory alloy wires begin to participate in the work, producing extrusion and tensile deformation respectively, and the damping of the device is further enhanced, which can effectively dissipate the dancing energy of the transmission line and reduce the dancing of the transmission line.

[0020] 3. The present invention is installed between different phase lines of the transmission line. It dissipates the dancing energy of the transmission line through deformation processes such as the swing of the mass ring, the compression of the viscoelastic rod and the stretching of the shape memory alloy wire, effectively reduces the dancing amplitude of the transmission line, controls the phase line to maintain a safe gap, and ensures the safety of the transmission line.

[0021] 4. The present invention has a reasonable design, a simple principle and is easy to install; the energy-absorbing and vibration-damping components of the present invention are installed in an assembled manner, and the internal core components such as viscoelastic rings, viscoelastic rods, shape memory alloy wires, etc. are relatively easy to replace; the connecting components of the present invention can be conveniently connected to various types of split conductor spacers, and can be conveniently applied to transmission lines of different specifications and forms, with a wide range of application scenarios. The device has good economic benefits and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention,

[0023] Figure 2 The present invention Figure 1 Schematic diagram of the cross section at AA in the middle,

[0024] Figure 3 The present invention Figure 1 Schematic diagram of the cross section at BB in the middle.

[0025] Figure 4 It is a schematic cross-sectional view of the viscoelastic ring in the present invention.

[0026] The numbers in the accompanying drawings are: 1, connecting component; 2, energy dissipation and vibration reduction component; 3, insulating component; 4, protective cover; 5, viscoelastic ring; 6, mass ring; 7, viscoelastic rod; 8, shape memory alloy wire; 9, upper connecting rod; 10, lower connecting rod; 11, circular through hole; 12, annular protrusion. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] See also Figures 1 to 4 As shown, a high-damping anti-dancing vibration reduction device comprises: a connecting component 1, an energy-absorbing vibration reduction component 2 and an insulating component 3 for dissipating the dancing energy of a transmission line, the bottom end of the energy-absorbing vibration reduction component 2 is fixedly connected to the top end of the insulating component 3, two connecting components 1 are provided, and the two connecting components 1 are respectively fixedly connected to the top end of the energy-absorbing vibration reduction component 2 and the bottom end of the insulating component 3, and the two connecting components 1 are used to connect with different phase transmission line clamps or spacer bars on the same group of transmission lines.

[0029] The connecting component 1 includes: two upper and lower clamping rings connected to each other, the left and right ends of the upper and lower clamping rings are detachably fixedly connected by bolts, and the upper and lower clamping rings are clamped and fixed with a phase transmission line clamp or a spacer rod; the upper and lower clamping rings can form a mouth-shaped structure or a circular structure.

[0030] The energy-absorbing and vibration-damping component 2 includes: an energy-absorbing and vibration-damping component 1, an energy-absorbing and vibration-damping component 2, an upper connecting rod 9 and a lower connecting rod 10. The energy-absorbing and vibration-damping component 1 is detachably fixedly installed on the upper connecting rod 9 to dissipate the small-amplitude dancing energy of the transmission line; the energy-absorbing and vibration-damping component 2 is detachably fixedly installed between the upper connecting rod 9 and the lower connecting rod 10 to dissipate the large-amplitude dancing energy of the transmission line together with the energy-absorbing and vibration-damping component 1.

[0031] The energy dissipation and vibration reduction component 1 includes: a viscoelastic ring 5 and a mass ring 6. A circular through hole 11 is provided in the middle of the viscoelastic ring 5. An annular protrusion 12 is provided at the outer edge of the viscoelastic ring 5. Two arc-shaped recessed parts are symmetrically provided between the circular through hole 11 and the annular protrusion 12 at the upper and lower ends of the viscoelastic ring 5. The thickness of the middle part of the viscoelastic ring 5 can be adjusted by adjusting the radius of the arc-shaped recessed part, thereby adjusting its deformation stiffness; the mass ring 6 is detachably fixedly connected to the annular protrusion 12 on the viscoelastic ring 5; the upper connecting rod 9 is set in two sections, wherein the upper top of the upper half is fixedly connected to the bottom of the upper connecting component 1, the lower part of the upper half is a screw and its size is smaller than the upper size of the upper half and smaller than the size of the circular through hole 11, and the diameter of the lower screw of the upper half is 2 to 3 mm smaller than the diameter of the circular through hole 11; the upper part of the lower half A threaded hole is provided at the center of the top, the lower part of the upper half movably passes through the circular through hole 11 and is threadedly connected in the threaded hole, the top and bottom ends of the viscoelastic ring 5 are respectively pressed and contacted with the upper bottom end of the upper half and the upper top end of the lower half of the upper connecting rod 9; the upper diameter of the upper half of the upper connecting rod 9 is the same as the upper diameter of the lower half and both are larger than the diameter of the circular through hole 11 by 5 to 10 mm; the mass ring 6 includes: two symmetrically arranged clamping ring structures, the two clamping rings are symmetrically provided with two annular clamping grooves on one side facing each other, the sizes of the two annular clamping grooves are respectively matched with the sizes of the annular protrusion 12 on the viscoelastic ring 5, the two annular clamping grooves are respectively clamped at the upper and lower ends of the annular protrusion 12, and the outer ends of the two clamping rings are fixedly connected by a plurality of bolts; the external dimensions of the mass ring 6 can be set to different thicknesses, heights, etc. according to needs to achieve the set quality.

[0032] The energy dissipation and vibration reduction component 2 includes: a viscoelastic rod 7 and a shape memory alloy wire 8. The lower part of the lower half of the upper connecting rod 9 is a flange plate 1; the upper part of the lower connecting rod 10 is a flange plate 2, and a mounting circular groove is provided in the middle of the top end of the flange plate 2. The diameter of the mounting circular groove matches the diameter of the viscoelastic rod 7. The bottom end of the viscoelastic rod 7 is fixedly connected to the mounting circular groove, and the top end of the viscoelastic rod 7 is pressed and contacted with the flange plate 1; a plurality of shape memory alloy wires 8 are provided, and the number of shape memory alloy wires 8 can be set to 3, 4, 6, etc. according to needs. The plurality of shape memory alloy wires 8 are distributed in a circular array and are respectively stretched between the flange plate 1 and the flange plate 2; the bottom end of the lower part of the lower connecting rod 10 is fixedly connected to the top end of the insulating component 3; the insulating component 3 adopts the insulator material and structure commonly used in power engineering, which is easy to use and has good insulation performance.

[0033] The high-damping anti-dancing vibration reduction device also includes: a protective cover 4, which completely wraps the energy-absorbing vibration reduction component 1 and the energy-absorbing vibration reduction component 2, which can prevent rain, radiation, etc. from damaging the performance of the viscoelastic material and extend the service life of the components; the top of the upper half of the upper connecting rod 9 penetrates from bottom to top to the top of the protective cover 4 and is tightly fixed to the protective cover 4; a through hole is opened in the middle of the bottom end of the protective cover 4, and the lower bottom end of the lower connecting rod 10 slides through the through hole and extends to the bottom of the protective cover 4, and the lower connecting rod 10 can move up and down; the protective cover 4 is a fiber-reinforced composite material such as FRP. While ensuring the mechanical strength and corrosion resistance of the protective cover 4, its mass is reduced, further reducing the load added to the transmission line.

[0034] The present invention can select and set the appropriate stiffness of the viscoelastic ring 5 and the mass of the mass ring 6 according to the natural frequency of the transmission line, so that the up and down swing frequencies of the mass ring 6 are basically consistent with the dancing frequency of the transmission line to achieve resonance, and the mass ring 6 will generate an inertial force opposite to the movement direction of the transmission line, thereby reducing the dancing of the transmission line; the viscoelastic ring 5 and the viscoelastic rod 7 are made of high-damping viscoelastic material through high-temperature and high-pressure vulcanization; each component in the device of the present invention adopts standardized design, batch production, and assembled installation, which is convenient for the application of the device in transmission lines of different forms and specifications.

[0035] Working principle: The device of the present invention is fixed between different phase lines of the transmission line by connecting with a wire clamp or a split conductor spacer; when the transmission line is subjected to wind load or ice shedding load and dances, the device will produce overall movement or axial deformation, and the viscoelastic ring 5 and the viscoelastic rod 7 will deform and consume energy, dissipate the energy of the transmission line dance, and reduce the amplitude of the transmission line dance.

[0036] Specifically, when the transmission line dances with a small amplitude, or the different phase transmission lines dance with a small relative amplitude, the entire device moves with the transmission line. At this time, the mass ring 6 in the device moves in the opposite direction to the dancing direction of the transmission line, and the opposite inertial force generated reduces the dancing of the transmission line. At the same time, the movement of the mass ring 6 will drive the viscoelastic ring 5 to deform. The deformation process of the viscoelastic ring 5 will dissipate the dancing energy of the transmission line and further reduce the dancing amplitude of the transmission line. When the different phase lines of the transmission line dance with a large relative amplitude, the device is driven to produce axial deformation. At this time, the viscoelastic rod 7 and the shape memory alloy wire 8 will produce extrusion or tensile deformation, dissipate the dancing energy of the transmission line and reduce the dancing amplitude.

[0037] The anti-dancing vibration reduction device of the present invention dissipates energy through deformation of the viscoelastic ring 5, the viscoelastic rod 7 and the shape memory alloy wire 8, thereby greatly suppressing the dancing amplitude of the transmission line, controlling the phase line gap of the transmission line within a safe range, and ensuring the safe operation of the transmission line.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "top / bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, according to the technical essence of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A high damping anti-dance vibration reduction device, characterized in that: include: A connecting component (1), an energy absorbing and vibration reducing component (2) for dissipating the dancing energy of a transmission line, and an insulating component (3), wherein the bottom end of the energy absorbing and vibration reducing component (2) is fixedly connected to the top end of the insulating component (3), two connecting components (1) are provided, and the two connecting components (1) are respectively fixedly connected to the top end of the energy absorbing and vibration reducing component (2) and the bottom end of the insulating component (3), and the two connecting components (1) are used to connect to different phase transmission line clamps or spacer bars on the same group of transmission lines.

2. A high damping anti-dance vibration reduction device according to claim 1, characterized in that: The connecting component (1) comprises: two upper and lower clamping rings connected to each other, the left and right ends of the upper and lower clamping rings are both detachably fixedly connected by bolts, and the phase transmission line clamp or spacer rod is clamped and fixed between the upper and lower clamping rings.

3. A high damping anti-dance vibration reduction device according to claim 1, characterized in that: The energy absorbing and vibration reducing component (2) comprises: an energy absorbing and vibration reducing component 1, an energy absorbing and vibration reducing component 2, an upper connecting rod (9) and a lower connecting rod (10); the energy absorbing and vibration reducing component 1 is detachably fixedly mounted on the upper connecting rod (9) for dissipating the small amplitude dancing energy of the transmission line; the energy absorbing and vibration reducing component 2 is detachably fixedly mounted between the upper connecting rod (9) and the lower connecting rod (10) for dissipating the large amplitude dancing energy of the transmission line together with the energy absorbing and vibration reducing component 1.

4. A high damping anti-dance vibration reduction device according to claim 3, characterized in that: The energy dissipation and vibration reduction component 1 comprises: a viscoelastic ring (5) and a mass ring (6); a circular through hole (11) is provided at the middle position of the viscoelastic ring (5); an annular protrusion (12) is provided at the outer edge position of the viscoelastic ring (5); two arc-shaped recessed parts are symmetrically provided at the upper and lower ends of the viscoelastic ring (5) between the circular through hole (11) and the annular protrusion (12); the mass ring (6) is detachably fixedly connected to the annular protrusion (12) on the viscoelastic ring (5); the upper connecting rod (9 ) is arranged in two sections, wherein the upper top of the upper section is fixedly connected to the bottom of the upper connecting component (1), and the lower part of the upper section is a screw rod whose size is smaller than the upper size of the upper section and smaller than the size of the circular through hole (11); a threaded hole is provided at the center position of the upper top of the lower section, and the lower part of the upper section movably passes through the circular through hole (11) and is threadedly connected in the threaded hole, and the top and bottom ends of the viscoelastic ring (5) are respectively pressed and contacted with the upper bottom end of the upper section and the upper top end of the lower section in the upper connecting rod (9).

5. A high damping anti-dance vibration reduction device according to claim 4, characterized in that: The upper diameter of the upper half of the upper connecting rod (9) is the same as the upper diameter of the lower half, and both are larger than the diameter of the circular through hole (11) by 5 to 10 mm.

6. A high damping anti-dancing vibration reduction device according to claim 4, characterized in that: The mass ring (6) comprises: two clamping ring structures symmetrically arranged in the upper and lower parts, two annular clamping grooves symmetrically arranged on opposite sides of the two clamping rings, the sizes of the two annular clamping grooves respectively matching the sizes of the annular protrusions (12) on the viscoelastic ring (5), the two annular clamping grooves respectively clamped at the upper and lower ends of the annular protrusions (12), and the outer ends of the two clamping rings are fixedly connected by a plurality of bolts.

7. A high damping anti-dancing vibration reduction device according to claim 4, characterized in that: The energy dissipation and vibration reduction component 2 comprises: a viscoelastic rod (7) and a shape memory alloy wire (8); the lower part of the lower half of the upper connecting rod (9) is a flange plate 1; the upper part of the lower connecting rod (10) is a flange plate 2; a mounting circular groove is provided in the middle of the top end of the flange plate 2; the diameter of the mounting circular groove matches the diameter of the viscoelastic rod (7); the bottom end of the viscoelastic rod (7) is fixedly connected to the mounting circular groove; the top end of the viscoelastic rod (7) is in tight contact with the flange plate 1; a plurality of shape memory alloy wires (8) are provided; the plurality of shape memory alloy wires (8) are distributed in a circular array and are respectively stretched between the flange plate 1 and the flange plate 2; the bottom end of the lower part of the lower connecting rod (10) is fixedly connected to the top end of the insulating component (3).

8. A high damping anti-dancing vibration reduction device according to claim 7, characterized in that: The insulating component (3) is an insulator.

9. The high damping anti-dancing vibration reduction device according to claim 7, characterized in that: Also includes: A protective cover (4), wherein the protective cover (4) completely wraps around the energy dissipation and vibration reduction component 1 and the energy dissipation and vibration reduction component 2; the top of the upper half of the upper connecting rod (9) penetrates from bottom to top to the top of the protective cover (4) and is tightly fixedly connected to the protective cover (4); a through hole is opened in the middle of the bottom end of the protective cover (4), and the lower bottom end of the lower connecting rod (10) slides through the through hole and extends to the bottom of the protective cover (4).

10. A high damping anti-dancing vibration reduction device according to claim 9, characterized in that: The protective cover (4) is made of a fiber-reinforced composite material.

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