CN214674244U - Wind-force damping prevents waving device - Google Patents

Abstract

The utility model discloses a wind damping anti-galloping device, which comprises a U-shaped bracket, two ends of the U-shaped bracket are respectively connected with fixed claw clips, and a "cross"-shaped socket is arranged in the middle of the bottom of the U-shaped bracket. A damping device for preventing galloping is connected with a snap-fit in the ”-shaped socket. The damping device is internally provided with a mechanism that can make the overhead line generate a reaction force in the direction of the lateral wind under the action of the lateral wind. The wind damping and anti-galloping device disclosed by the utility model can drive the damping hammer at one end of the connecting rod to swing to the weak side of the wire under the force of the lateral wind at the same time when the wire is subjected to lateral wind, so as to prevent This balanced wire is not uniformly stressed in the crosswind and thus causes wire galloping. The patented design of the utility model is ingenious, makes full use of the action of the lateral wind to resist the galloping of the wires, has a simple structure and a wide range of application scenarios.

Description

Wind-force damping prevents waving device

Technical Field

The utility model relates to a transmission line auxiliary facilities technical field, concretely relates to wind-force damping prevents waving device.

Background

At present, transmission lines in operation and construction mostly adopt a multi-split conductor structure with 6-split conductors, 8-split conductors and the like, a power grid net rack is complex, the average height of towers is high, a large number of towers with the same tower and double circuit towers are adopted, the energy distribution characteristics of China determine that the main transmission line net rack structure is in the east-west direction, the line distance is long, the adjustment of weather and geographical conditions of a line corridor is complex, the included angle between a main line part and a main wind direction in winter is large, and the main factors are easy to cause galloping.

The conductor galloping is a low-frequency and large-amplitude self-excited vibration phenomenon generated by an overhead conductor with uneven ice coating along the circumferential direction under the action of lateral wind. When the conducting wire is waved, standing waves or traveling waves with one, two or three antinodes are formed in the first conducting wire, the conducting wire mainly moves vertically and sometimes moves in an ellipse, the long axis of the ellipse is in the vertical direction or deviates from the vertical direction, and sometimes the conducting wire is twisted. The frequency of vertical vibration is about 0.1-1 Hz, and the amplitude is between dozens of centimeters and several meters. The serious wire galloping is that an antinode vibration is generated in a large-span wire, and the suspension insulator string swings along the line direction, so that the amplitude can be as high as or even slightly higher than the maximum sag value (about 10-12 m).

Research results show that line galloping is a self-excited vibration phenomenon with low frequency (about 0.1-3 Hz) and large amplitude (> 10 m) generated under the excitation action of wind after eccentric icing of a wire. The formation of the waving depends mainly on the factors of 3, i.e. the icing, the excitation of the wind (wind speed and direction) and the line configuration parameters. The line galloping which occurs in winter in 2009-2010 belongs to typical ice-coating galloping, and the occurrence conditions, the galloping expression form, the resulting effect and the like of the line galloping are basically consistent with the conventional galloping law, but have some new characteristics.

The twisting operation of the wire is the main reason for promoting the waving, and when the wire with large amplitude waves, the twisting motion with the same period is formed. For the energy absorbed by the wire, the proportion of the energy absorbed by the insulators, the end parts and other hardware fittings is small, and the waving is easy to occur. The greater the tension of the wire, the less energy the wire itself will absorb, the more conducive to the formation and development of a dance movement.

The vibration modes of the overhead conductor can be divided into out-of-plane vibration and in-plane vibration, and the in-plane vibration modes are divided into symmetrical and anti-symmetrical modes. Similar to the initial configuration of the overhead conductor, the analysis of the dynamic characteristics thereof includes both analytical methods and finite element methods.

The analytical method for calculating the power characteristics is only suitable for the condition that single-gear wires with hinged two ends are subjected to vertically and uniformly distributed loads, and a finite element method is needed to be used for calculating the power characteristics of multi-gear power transmission lines under various loads and complex boundary conditions in actual engineering. Research suggests that at certain wind speeds and angles of attack, flapping will occur. As can be seen, whether the overhead conductor is rippled or not is related to the aerodynamic characteristics of the ice-coated conductor section.

The galloping not only causes short circuit tripping, but also causes the looseness of tower bolts, the reduction of strength, the damage of hardware fittings, insulators and jumper wires, the strand breakage and the wire breakage of a lead, the damage of tower materials and foundations, even the damage of a large amount of machines such as tower falling and the like, and the difficulty of rush repair is high. In addition, defects such as looseness of tower bolts, hidden damage of wires, hardware fittings and insulators and the like caused by galloping are often difficult to find in a short time, and threat to safe operation of the line is formed.

The main measure for controlling the galloping of the transmission line is to additionally install an anti-galloping device or carry out anti-galloping technical transformation, wherein the anti-galloping device mainly comprises a wire clamp rotary spacer, a phase-to-phase spacer, a double-pendulum anti-galloping device and the like, and the anti-galloping device can be combined and applied. The anti-galloping technical improvement comprises the steps of improving the anti-looseness performance of the iron tower bolt, properly improving the strength of key parts of the tower and relevant hardware fittings, properly reducing the span and the length of the strain section, changing the line trend of a local area, avoiding galloping zones and the like.

SUMMERY OF THE UTILITY MODEL

The utility model discloses be exactly according to the root cause design that produces the electric wire waving among the background art, make full use of side wind produces the drawback of waving, provides a new technical scheme.

The technical scheme is as follows: the utility model provides a wind-force damping anti-galloping device, includes the U-shaped support, and U-shaped support both ends are connected with fixed claw respectively and press from both sides, are equipped with "ten" font socket in the middle of the bottom of U-shaped support, the damping device who prevents galloping is connected to the buckle formula in "ten" font socket, damping device is inside to be equipped with and to make overhead line produce the mechanism along crosswind direction reaction force under the effect of crosswind, damping device includes pivot seat, connecting rod, spherical fan housing, damping hammer, wherein the one end fixed connection damping hammer of connecting rod, the spherical fan housing of other end fixed connection, all open the pivot round hole on connecting rod and the pivot seat, through pin pivotal connection between connecting rod and the pivot seat, the connecting rod can the free rotation in the pivot seat, the wind-receiving contact surface of spherical fan housing is in the coplanar with the direction of rotation of connecting rod.

Furthermore, fixed screw holes are formed in two side faces of the claw clamp, and arc-shaped grooves fixed on the wires are formed in the inner portions of the two side faces of the claw clamp.

Furthermore, the spherical fan housing comprises a hemisphere shell with two hemispheres connected back to back.

Further, the jaw may be fixed to the spacer or the power line by a bolt.

Compared with the prior art, the utility model discloses a wind-force damping anti-galloping device can receive the side wind at the electric wire simultaneously, and spherical fan housing drives the damping hammer of connecting rod one end and swings to the weak one side of electric wire atress under the effort of side wind to this balanced electric wire is waved to the electric wire that consequently the atress is inhomogeneous arouses in the side wind. The utility model discloses a design benefit, the electric wire that the effect of make full use of crosswind resisted waves, and simple structure, use scene scope are wide.

Drawings

Fig. 1 is a front view of the structure of an embodiment of the present invention;

fig. 2 is a top view of a U-shaped bracket according to an embodiment of the present invention;

fig. 3 is a side view of a U-shaped bracket according to an embodiment of the present invention;

fig. 4 is a front view of a damping device according to an embodiment of the present invention;

fig. 5 is a side view of a damping device according to an embodiment of the present invention;

fig. 6 is a reference schematic diagram of the embodiment of the present invention mounted on an electric wire;

fig. 7 is a reference schematic diagram of the spacer mounted on the spacer according to an embodiment of the present invention.

In the figure: u-shaped support 1, claw clamp 2, "cross" shape socket 3, damping device 4, pivot seat 401, connecting rod 402, spherical fan housing 403, damping hammer 404.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention.

As shown in the accompanying drawings 1 to 3, the wind-force damping anti-galloping device is characterized by comprising a U-shaped support 1, wherein two ends of the U-shaped support 1 are respectively connected with a fixed claw clamp 2, two side surfaces of the claw clamps 2 are provided with fixed screw holes, arc-shaped grooves fixed on a lead are formed in the inner parts of two side surfaces of the claw clamps 2, a cross-shaped socket 3 is arranged in the middle of the bottom of the U-shaped support 1, a damping device 4 for preventing galloping is connected in the cross-shaped socket 3 in a clamping and buckling mode, and a mechanism capable of enabling an overhead line to generate reaction force along the crosswind direction under the action of lateral wind force is arranged in the damping device 4.

As shown in fig. 4 and 5, the damping device 4 includes a pivot seat 401, a link 402, a spherical hood 403, and a damping hammer 404, wherein one end of the link 402 is fixedly connected to the damping hammer 404, and the other end of the link 402 is fixedly connected to the spherical hood 403, the link 402 and the pivot seat 401 are both provided with pivot circular holes, the link 402 and the pivot seat 401 are pivotally connected through a pin, the link 402 can freely rotate in the pivot seat 401, a wind-contacting surface of the spherical hood 403 and a rotation direction of the link 402 are in the same plane, and the spherical hood 403 includes two hemispherical shells connected by leaning against each other.

As shown in fig. 6 and 7, the jaw 2 may be fixed to a spacer or a power line by means of a bolt, and the damping device 4 may be installed in a direction opposite to the U-shaped bracket 1 by means of a position of the pivot base 401 with respect to the cross-shaped socket 3 according to a direction of a side wind.

The working principle is as follows: as shown in fig. 6 and 7, the wind damping anti-galloping device in this embodiment is fixed below the electric wire or the spacing rod through the claw clip 2, when the electric wire is subjected to side wind, the spherical wind cover 403 drives the damping hammer 404 at one end of the connecting rod 402 to swing towards the side of the electric wire with weak stress under the action of the side wind, so as to balance the electric wire galloping caused by uneven stress of the electric wire in the side wind.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. The utility model provides a device is prevented waving by wind-force damping which characterized in that: the device comprises a U-shaped support (1), two ends of the U-shaped support (1) are respectively connected with a fixed claw clamp (2), a cross-shaped socket (3) is arranged in the middle of the bottom of the U-shaped support (1), a damping device (4) for preventing galloping is connected in a clamping and buckling mode in the cross-shaped socket (3), a mechanism capable of enabling an overhead line to generate reaction force along the cross wind direction under the action of lateral wind is arranged in the damping device (4), the damping device (4) comprises a pivoting seat (401), a connecting rod (402), a spherical fan housing (403) and a damping hammer (404), one end of the connecting rod (402) is fixedly connected with the damping hammer (404), the other end of the connecting rod (402) is fixedly connected with the spherical fan housing (403), pivoting round holes are formed in the connecting rod (402) and the pivoting seat (401), the connecting rod (402) is pivotally connected with the pivoting seat (401) through a pin, and the connecting rod (402) can freely rotate in the pivoting seat (401), the wind-receiving contact surface of the spherical wind cover (403) and the rotation direction of the connecting rod (402) are in the same plane.

2. A wind-damped anti-galloping device according to claim 1, wherein: fixed screw holes are formed in the two side faces of the claw clamp (2), and arc-shaped grooves fixed on the wires are formed in the inner portions of the two side faces of the claw clamp (2).

3. A wind-damped anti-galloping device according to claim 1, wherein: the spherical fan cover (403) comprises a hemisphere shell with two hemispheres connected back to back.

4. A wind-damped anti-galloping device according to claim 1, wherein: the claw clamp (2) can be fixed on the spacing rod or the power transmission line through a bolt.

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