KR102033590B1 - Line tension maintenance device for transmission tower and pylon - Google Patents

Abstract

The present invention relates to a line tension maintaining device for a transmission and distribution steel tower and, more specifically, to an improved line tension maintaining device for a transmission and distribution steel tower which can be safely maintained from strong winds (including typhoons) having instantaneous speeds exceeding a speed of 40 meters a second while weather abnormality occurs, and can maintain a safe extra-high voltage transmission and distribution line in response to changes in tension of the transmission and distribution line.

Description

Line tension maintenance device for transmission tower and pylon

The present invention relates to a line tension maintaining device for transmission and distribution steel towers, and more particularly, in response to changes in tension of transmission and distribution lines while being able to be safely maintained even by strong winds (including typhoons) having an instantaneous speed of more than 40 meters per second while meteorological abnormalities occur. The present invention relates to an improved line tension maintaining device for a transmission and distribution pylon to maintain a safe transmission and distribution line.

In general, in the construction of transmission and distribution lines that are installed to transmit and distribute power generated from power plants to factories, homes, and the like, the fixed base unit, which is the foundation of the steel tower, is the foundation for firmly supporting the steel tower. It is very big.

The fixed base unit of the steel tower has a feature that the shape and scale of the foundation is determined by the uplift, unlike the basic facilities of general civil engineering, and it is somewhat different from the fixed base unit of the general structure based on the compressive force. The design method is different.

These pylons have various forms such as quadrilateral pylons, square pylons, gate pylons, vacant pylons, rotary pylons, and MC pylons in consideration of the terrain, and differ in form and height depending on the transmission power, voltage, and malformation of the track. The height is 60m, and it is usually formed in the form of a square using L-shaped steel, and the foundation is fixed to the structure in concrete.

Steel towers of transmission and distribution lines usually support three-phase, two-wire, or six wires with insulators, and the distance between the steel towers is 20 to 30 m, and the minimum height from the surface of the wires installed on the tower is based on the electrical equipment technology. In the case of a special high voltage line of 150,000 V, for example, it is 6 m.

Pylon for transmission and distribution line allows a plurality of transmission and distribution lines to be connected to each other, and these transmission and distribution lines are installed at high altitudes and are subject to a lot of climatic influences such as wind, snow and rain due to the characteristics of being installed at high altitudes. It is installed.

Transmission and distribution lines cause sag on the track after a certain time, and when strong winds such as typhoons blow, the lines shake violently up and down, causing friction between each other. It has also been the cause of large safety accidents.

To this end, periodical repairs are performed to adjust the tension of transmission and distribution lines to cope with safety accidents caused by sagging of transmission and distribution lines.

However, frequent maintenance work not only causes inconvenience to electric power users, but also hassles that require human labor.

On the other hand, lightning arresters are provided to protect the transmission and distribution lines from lightning strikes. Transmission lines are mostly overhead lines and are exposed to the outdoors, so lightning strikes frequently occur under meteorological conditions such as lightning strikes, and transport large amounts of power. Due to the nature of transmission lines, flashover failures caused by lightning strikes result in temporary or permanent power outages, and failures in power transmission can cause significant economic and social losses beyond the loss of power usage.

Thus, as shown in FIG. 1, a plurality of transmission and distribution towers 10, 11, and 12 are arranged at regular intervals, and a ground portion 20 connected to the ground is installed below the transmission and distribution towers 10, 11, and 12. A plurality of transmission and distribution lines 30 are installed through the suspension insulator 40, and a lightning arrester (not shown) is installed around the suspension insulator 40 to protect the transmission and distribution line 30.

At this time, the suspension insulator 40 is a structure in which at least nine insulators are connected in series, but schematically illustrated in FIG. 1 to explain the concept, and the overhead processing line 50 to prevent the transmission and distribution line 30 from being disconnected. This may be installed.

However, as weather abnormalities occur, strong winds (including typhoons) having instantaneous speeds exceeding 40 m / sec have been recently generated. Thus, when the tension of the transmission and distribution line 30 is severe and the buffering is difficult, the transmission and distribution line 30 is difficult. There was a high risk of a safety accident, such as breaking.

In order to improve this, a number of tension adjusting devices or suspension insulators have been disclosed, such as the following [Previous Technical Documents]. However, most of them have a structure using only elastic return force of the coil spring. Degradation during oil flow, and mainly responsible for the tension buffer function for the longitudinal direction of the transmission and distribution line 30, the buffer function for the up and down flow of the portion connected to the suspension insulator is insufficient.

Republic of Korea Patent Registration No. 10-0904199 (2009.06.16.), 'Fixed structure of suspension insulator for transmission line steel tower' Korean Patent Registration No. 10-0927116 (2009.11.10.), 'Suspension insulator for transmission line steel tower'

The present invention was created in view of the above-mentioned problems in the prior art as described above, and can be safely maintained even by strong winds (including typhoons) having an instantaneous speed of more than 40 meters per second while meteorological abnormalities occur, and tension of transmission and distribution lines. Its main purpose is to provide an improved line tension retaining device for transmission and distribution pylons to cope with changes to maintain safe transmission and distribution lines.

The present invention as a means for achieving the above object, in the line tension maintaining apparatus for transmission and distribution steel tower provided in the steel tower;
The extension frame 100 is further fixed in parallel with the transmission and distribution line L at the end of the steel frame FR, which is a steel tower structure on which the suspension insulator IS is installed; The extension frame 100 is further provided with a wire sag prevention unit 200 for suppressing the sag caused by the tension change of the transmission and distribution line (L);
The wire sag prevention unit 200 includes a unit base 220 which is assembled by sliding on the protruding guide 110 protruding from the surface of the extension frame 100, one side of the unit base 220 The tension control motor 230 is fixed, the ball screw 240 arranged in the longitudinal direction of the unit base 220 is connected to the motor shaft of the tension control motor 230, the length of the ball screw 240 A portion of the reference point 242 is provided, the spiral direction on both sides of the reference point 242 is configured to face each other, the ball screw 240 is a pair of left block 250 and the right to move along this The block 260 is fitted and screwed to each other, and slip bearings 270 are fixed to the surfaces of the left block 250 and the right block 260 to be symmetrical to each other, and the slip bearing 270 has a 'V' shape. The slider 280 is raised and lowered while being in contact with the slider 280. Description, and the lower sides of the slider 280, the dielectric breakdown region (210) for fixing the transmission and distribution line (L) is further provided;
The insulating gripper 210 has a gripping body 211 integrally fixed to the slider 280, a flow guide groove 212 formed in the cross-section of the gripping body 211, and the transmission and distribution line (L) Hook portion 213 to be seated and supported, the engaging protrusion 214 protruding from one end of the hook portion 213 into the flow guide groove 212 and the flow guide groove 212 up and down A fixing pin 215 penetrating the coupling protrusion 214 and the upper and lower flow guide grooves 212 fitted into the fixing pin 215 and divided based on the coupling protrusion 214. It provides a line tension maintaining device for transmission and distribution pylon, characterized in that made of an elastic spring (216).

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According to the present invention, it can be safely maintained even by strong winds (including typhoons) having an instantaneous speed of more than 40m per second while meteorological abnormalities occur, and can obtain an improved effect to maintain a safe transmission and distribution line in response to the tension change of the transmission and distribution line. have.

1 is an exemplary view showing a transmission and distribution line of a general transmission and distribution tower.
Figure 2 is an exemplary view showing an installation example of the line tension maintaining device for transmission and distribution steel tower according to the present invention.
3 and 4 is an exemplary view showing an operating state of the line tension maintaining device for transmission and distribution steel tower according to the present invention.
FIG. 5 is an exemplary view illustrating a modified example of the insulating gripping electrode in FIG. 3.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

Prior to the description of the present invention, the following specific structures or functional descriptions are merely illustrated for the purpose of describing embodiments according to the inventive concept, and the embodiments according to the inventive concept may be implemented in various forms, It should not be construed as limited to the embodiments described herein.

In addition, embodiments in accordance with the concepts of the present invention may be modified in various ways and may have various forms, specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a particular disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

As shown in Figure 2, the line tension maintaining device for transmission and distribution pylon according to the present invention is an extension frame parallel to the transmission and distribution line (L) at the end of the steel frame (FR) which is a steel tower structure on which the suspension insulator (IS) is installed ( 100) is further fixed.

The extension frame 100 is also firmly fixed on the iron frame FR through a fixing member including a plurality of brackets as an iron structure.

In addition, the extension frame 100 is provided with a wire sag prevention unit 200 for suppressing the sag caused by the tension change of the transmission and distribution line (L).

The wire sag prevention unit 200 receives a detection signal detected from a temperature sensor and a wind speed sensor to lift the transmission and distribution line (L) to prevent sagging due to the change in tension. It includes an insulating gripping 210 that can be caught by the transmission and distribution line (L).

In addition, the air temperature sensor and the wind speed sensor may be installed on the iron frame (FR), the controller according to a specific condition, such as when the temperature exceeds 35 ℃, and when the wind speed exceeds 25m per second Under the control of the) is configured to move the wire sag prevention unit 200.

3 and 4, the wire sag prevention unit 200 includes a unit base 220, which is assembled in a sliding manner on the protruding guide 110 protruding from the surface of the extension frame 100. .

That is, the protruding guide 110 is configured to protrude in a substantially '형상' shape from the surface of the extension frame 100 so that the unit base 220 can be fitted.

Because of this, the unit base 220 may be fitted in a side through one end of the protruding guide 110 and then adjusted in a sliding manner, and then assembled in a manner of being fixed using a bolt or a screw at a desired position.

In addition, the tension control motor 230 is fixed to one side of the unit base 220, the tension control motor 230 may be installed to be driven by using a voltage drop is transformed from the transmission and distribution line (L). The ball screw 240 arranged in the longitudinal direction of the unit base 220 is connected to the motor shaft of the tension control motor 230.

At this time, the ball screw 240 is installed so that the end is fixed to the bearing and rotate in place.

In particular, a reference point 242 is provided at a part of the length of the ball screw 240, and the left and right, that is, the helical directions of both sides are opposed to each other with respect to the reference point 242.

For example, if the right side spiral (RSC) is formed on the tension control motor 230 side with respect to the reference point 242, the left side spiral (LSC) may be formed on the end side of the opposite side of the ball screw 240. have.

In addition, the ball screw 240 is fitted with a pair of the left block 250 and the right block 260 that are movable along the screw coupling.

In this case, the left block 250 and the right block 260 are also fixed to the upper and lower ends of the unit base 220 in the same manner as the unit base 220 is assembled to the protruding guide 110, respectively. It is assembled to be slidable in the longitudinal direction.

In addition, the ball screw 240 is inserted into the center of one side of the left block 250 and the right block 260, the coupling protrusion (DT) is screwed is formed.

In addition, the left block 250 and the right block 260 are assembled at a point that is symmetrical about the reference point 242.

Accordingly, the left block 250 and the right block 260 may be closer to each other or farther from each other according to the rotation direction of the tension control motor 230, and are always symmetrical about the reference point 242. You will get closer or further away.

Meanwhile, slip bearings 270 are fixed to the surfaces of the left block 250 and the right block 260 to be symmetrical with each other.

The slip bearing 270 contacts the slider 280 having a 'V' shape to guide the rise and fall of the slider 280.

At this time, the open ends of the slider 280 is bound to each other by at least one fastener 282 is configured to always maintain a constant interval of the 'V' shape.

For example, when the left block 250 and the right block 260 move in a direction away from each other, the slider 280 is engaged with the left block 250 and the right block 260, so to preserve the distance therebetween. Inevitably, the slider 280 is pushed up when the left block 250 and the right block 260 are close to each other.

In particular, since the slip bearing 270 guides the slip well while the slider 280 is fixed as a bearing so as not to be separated and separated, the slip bearing 270 is very easy and smooth with respect to the movement of the left block 250 and the right block 260. Will move.

Therefore, when the temperature rises in the cold weather, the transmission and distribution line (L) is stretched while linearly expanding as the temperature rises, which inevitably causes a sag phenomenon. Accordingly, in the present invention, the tension change is predicted in consideration of the linear expansion coefficient of the wire for each temperature change, the measurement is made, and the value is tabulated to operate the wire sag prevention unit 200 for each temperature distribution. L) can be lifted so that the tension is adjusted to suppress the deflection.

This may be controlled by using a temperature sensor and a wind speed sensor together to raise tension to raise tension to increase tension in order to suppress fluctuations due to line deflection at high wind speeds, and vice versa. .

At this time, the insulating gripping member 210 is to be raised or lowered by holding the transmission and distribution line (L), as shown in Figure 5 to increase the gripping force, the gripping body body 211 integrally fixed to the slider 280 And, the flow guide groove 212 formed in the cross-section of the holding body 211, the hook portion 213 for supporting the transmission line (L) is seated, and protrudes from one end of the hook portion 213 is A coupling protrusion 214 inserted into the flow guide groove 212, a fixing pin 215 penetrating the flow guide groove 212 up and down to bind the coupling protrusion 214, and the fixing pin 215. And an elastic spring 216 inserted into the upper and lower flow guide grooves 212 divided by the coupling protrusion 214.

Thus, when lifting the tension of the transmission line (L) under tension due to the buffering action of the elastic spring 216 is fine but by the time difference by dispersing and buffering the first force applied to the transmission line (L) for a safer lifting You will be guided.

100: extension frame
200: wire sag prevention unit

Claims (1)

In the line tension maintaining device for transmission and distribution pylon provided in the pylon;
The extension frame 100 is further fixed in parallel with the transmission and distribution line L at the end of the steel frame FR, which is a steel tower structure on which the suspension insulator IS is installed; The extension frame 100 is further provided with a wire sag prevention unit 200 for suppressing the sag caused by the tension change of the transmission and distribution line (L);
The wire sag prevention unit 200 includes a unit base 220 which is assembled by sliding on the protruding guide 110 protruding from the surface of the extension frame 100, one side of the unit base 220 The tension control motor 230 is fixed, the ball screw 240 arranged in the longitudinal direction of the unit base 220 is connected to the motor shaft of the tension control motor 230, the length of the ball screw 240 A portion of the reference point 242 is provided, the spiral direction on both sides of the reference point 242 is configured to face each other, the ball screw 240 is a pair of left block 250 and the right to move along this The block 260 is fitted and screwed to each other, and slip bearings 270 are fixed to the surfaces of the left block 250 and the right block 260 to be symmetrical to each other, and the slip bearing 270 has a 'V' shape. The slider 280 is raised and lowered while being in contact with the slider 280. Description, and the lower sides of the slider 280, the dielectric breakdown region (210) for fixing the transmission and distribution line (L) is further provided;
The insulating gripper 210 has a gripping body 211 integrally fixed to the slider 280, a flow guide groove 212 formed in the cross-section of the gripping body 211, and the transmission and distribution line (L) Hook portion 213 to be seated and supported, the engaging protrusion 214 protruding from one end of the hook portion 213 into the flow guide groove 212 and the flow guide groove 212 up and down A fixing pin 215 penetrating the coupling protrusion 214 and the upper and lower flow guide grooves 212 fitted into the fixing pin 215 and divided based on the coupling protrusion 214. Line tension retaining device for transmission and distribution pylon, characterized in that made of an elastic spring (216).

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