JPH08335416A - V-shaped suspension type lighting insulator device - Google Patents

Abstract

PURPOSE: To provide a V-suspension type non-energized insulator device in which need of replacing an insulation insulator string by a lightning insulator string can be eliminated for both of a pair of insulator strings in the case where a lightning insulator device is applied for an existing V-shaped suspension device to simplify construction and reduce construction cost. CONSTITUTION: At least one insulator string of a pair of insulator strings 11, 12 in a V-suspension device is composed of an insulation insulator string 14A comprising plural ordinary insulators 14 connected to each other. A lightning insulator string 17 comprising a lightning insulator part 18A comprising plural lightning insulators 18 connected to each other serially connected to and an insulation insulator 19A comprising plural ordinary insulators 19 connected to each other is disposed between a support arm 13 and a transmission line 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a V suspension type lightning arrester device.

[0002]

2. Description of the Related Art Generally, in a power transmission line, the power transmission line is supported by a support arm of a steel tower via a V suspension device including a pair of insulators. That is, each pair of insulators is composed of a series of insulators formed by connecting a plurality of normal insulators (suspended insulators), and is mounted on a support arm of a steel tower at predetermined intervals. The ends on the voltage application side of both insulators are connected to each other, and the power transmission line is supported by the connection part on the voltage application side.

Conventionally, when a lightning insulator device is applied to an existing V-hanging device of this kind, a pair of insulator insulators are used together.
The V-suspension type lightning arrester device is configured by replacing the series of lightning insulators with the series of lightning insulators. FIG. 4 shows an example of the conventional V suspension type lightning arrester device.

As shown in the figure, a pair of mounting brackets 31 are fixedly arranged on the lower surface of a support arm 32 of a steel tower at predetermined intervals, and a supporting bracket 33 is rotatably mounted on each mounting bracket 31. There is. The first insulator string 34 and the second insulator string 35 are suspended and supported at the lower ends of the respective support fittings 33 via upper horn mounting fittings 36.

The first insulator string 34 is formed by connecting in series a lightning arrester insulator portion 37A formed by connecting a plurality of lightning arrestor insulators 37 and an insulator insulator portion 38A formed by connecting a plurality of ordinary insulators 38 in series. There is. The second insulator series 35 is the first insulator series 34.
Is composed of an insulator portion 39A formed by connecting a plurality of insulators 39 and a lightning insulator portion 40A formed by connecting a plurality of lightning insulators 40 in series so that the arrangement order is upside down. There is.

The lightning protection insulators 37, 40 in each of the insulator chains 34, 35 have a cap shape, and a cylindrical portion 41 is integrally formed in a part thereof. The current limiting element 42 made of a material whose main component is zinc oxide, which has a non-linear voltage-current characteristic, is housed in the housing cylinder 41. Further, as the normal insulators 38 and 39 in the respective insulator chains 34 and 35, deep pleated anti-pollution insulators (so-called salt insulators) are used.

The number of the lightning protection insulators 37, 40 and the normal insulators 38, 39 connected in the respective insulator chains 34, 35 is changed according to the contamination classification as shown in FIG. For example, in the area S1 where the pollution is small, two lightning protection insulators 37 and three normal insulators 38 are used for the first insulator series 34 on the left side, and three normal insulators 3 are used for the second insulator series 35 on the right side.
Nine and one lightning protection insulator 40 are used. Further, in the heavily polluted area S5, the first insulator insulator 34 on the left side is
3 lightning insulators 37 and 6 normal insulators 38 are used,
Six normal insulators 39 and two lightning protection insulators 40 are used for the second insulator string 35 on the right side.

As shown in FIG. 4, the connecting yoke 43 is attached to the lower ends of the two insulator series 34, 35 via the lower horn mounting metal fittings 44, and the connecting yoke 43 causes the two insulator series 34, 35 to operate on the power supply side. The ends are connected so as to form a substantially V shape. The electric wire clamp 45 is attached to the lower center of the connecting yoke 43.
A power transmission line 46 is suspended and supported on the.

The first arcing horn 47 is located at the connection portion between the lightning protection insulator portion 37A of the first insulator series 34 and the insulator portion 38A, so that the cap of the uppermost ordinary insulator 38 in the insulator portion 38A is located. It is attached to the metal fittings. The second arcing horn 48 is attached to the cap fitting of the uppermost lightning protection insulator 40 in the lightning protection insulator 40A so as to be located at the connection portion between the insulator insulation 39A of the second insulator series 35 and the lightning protection insulator 40A. ing. The first and second arcing horns 47 and 48 are arranged opposite to each other with an air discharge gap G1 having a predetermined length.

In this V-suspension type lightning arrester device, when a lightning surge current enters the power transmission line 46 due to a lightning strike, the current passes through the lightning insulator portion 40A of the second insulator string 35 to the second arcing horn 48. Flow and flashover the air discharge gap G1. After that, the electric current flows from the first arcing horn 47 to the support arm 32 through the lightning protection insulator portion 37A of the first insulator series 34, and is discharged from the steel tower to the ground. Further, the subsequent flow due to the operating voltage generated thereafter is caused by the lightning protection insulator portion 37A of the two insulator chains 34, 35.
It is suppressed and cut off by the current limiting element in 40A and the air discharge gap G1.

[0011]

However, the conventional V-suspension type lightning arrester device has the following problems. (1) When the lightning arrester insulator device is applied to the existing V suspension device, the pair of insulator insulators 34 and 35 are both replaced from the insulator insulator conductor to the lightning insulator insulator conductor. For this reason, the construction work became large-scale and the construction cost was high. (2) A pair of insulators 34, 35 constituting the V suspension device
However, both of them are composed of a series of lightning protection insulators 37, 40. For this reason, when there is an abnormal lightning stroke that exceeds the assumption and the lightning protection insulators 37, 40 release pressure, both insulator chains 34, 35 are disconnected and the transmission line 46 cannot be supported. There was a fear that. (3) The arcing horns 47 and 48 are each insulator insulator 34,
35, each of which is disposed in the intermediate portion of
1 straddles both insulator chains 34 and 35, and is formed between the tip portions of both arcing horns 47 and 48. For this reason,
As shown in FIG. 5, as the number of connected insulators 37 to 40 in each insulator series 34, 35 increases in the heavy pollution area, and the longer each insulator series 34, 35 becomes, the insulator series 34, 35 bends. It was difficult to adjust the air discharge gap G1.

The present invention has been made by paying attention to the problems existing in such conventional techniques. It is an object of the present invention to provide a V-suspension type lightning arrester device which can simplify the construction and reduce the construction cost when the lightning arrester device is applied to an existing V suspension device.

Another object of the present invention is to provide a V-suspension type lightning arrester capable of supporting a power transmission line without any trouble even if a situation occurs in which a lightning insulator series is disconnected due to an abnormal lightning stroke that exceeds the assumption. It is to provide an insulator device.

Still another object of the present invention is to provide a V-suspension type lightning arrestor device which can easily adjust the air discharge gap even when the pair of insulators becomes long in the heavy pollution area. It is in.

[0015]

In order to achieve the above object, in the invention according to claim 1, a pair of insulator chains are mounted on a support arm of a steel tower at predetermined intervals, and
In a V-suspension device in which the power-supply side end portions of both insulator series are connected to each other and a power transmission line is supported at the power-supply-side connection portion, at least one insulator series of the pair of insulator series is a normal insulator. It is composed of a plurality of linked insulators, and further, between the support arm and the power transmission line, a lightning protection insulator part formed by connecting a plurality of lightning protection insulators, and an insulation insulator part formed by connecting a plurality of normal insulators are provided. Is provided with a series of lightning protection insulators connected in series.

According to a second aspect of the present invention, in the V-suspension type arrester device according to the first aspect, both of the pair of insulator insulators are formed of insulator insulators, and the conductor arrester insulator is provided in the middle of both insulator insulators. Is provided.

According to a third aspect of the present invention, in the V-suspension type lightning insulator device according to the first aspect, one of the pair of insulator series comprises an insulator series and the other insulator series. Is replaced by a series of lightning insulators.

According to a fourth aspect of the present invention, in the V-suspension type lightning arrester device according to the second or third aspect, arcing horns are provided at both ends of the insulator portion of the lightning arrestor series, respectively. The arcing horns are opposed to each other via a predetermined air discharge gap.

According to a fifth aspect of the present invention, in the V-suspension type lightning arrester device according to the third aspect, a connecting portion between the lightning arrestor portion and the insulator portion in the lightning insulator insulator series, and charging of the insulator insulator series. Arranging arcing horns at the side edges,
Both arcing horns are opposed to each other through a predetermined air discharge gap.

[0020]

The V according to claim 1, claim 2 and claim 3
In the hanging type lightning arrester device, when the lightning arrester device is applied to an existing V-hanging device, it is not necessary to replace the pair of insulator insulators with the lightning insulator insulator, and at least one insulator insulator is used. You can replace it with a string. Therefore, the construction can be simplified and the construction cost can be reduced.

Further, in the V-suspension type arrester device according to claim 1, claim 2 and claim 3, a situation occurs in which the arrester string is disconnected due to an abnormal lightning stroke that exceeds the assumption. In this case, the transmission line can be supported by the at least one insulator string without any trouble. Therefore, it is possible to prevent the pair of insulators from being disconnected from each other and the power line from becoming unsupportable.

Further, V according to claim 4 and claim 5
In the suspension type lightning arrester device, even if the pair of insulator pairs becomes long in the heavy pollution area, the air discharge gap can be easily adjusted without being affected by the bending of the insulator pair.

[0023]

First Embodiment A first embodiment of the present invention will be described below with reference to FIG. In the V-suspension type lightning arrester device of the first embodiment, the first insulator string 11 and the second insulator string 12 are mounted on the support arm 13 of the steel tower at predetermined intervals. Each insulator string 11, 12 is a normal insulator 14, respectively.
It is composed of a series of insulators 14A formed by connecting a plurality of.

The connecting yoke 15 is made up of the above-mentioned two insulator pairs 11, 12.
Is attached to the lower end of the insulator, and the insulator yokes 11 and 12 are connected to each other by the connecting yoke 15 so as to be substantially V-shaped at the end on the power-supply side. And this connecting yoke 15
The power transmission line 16 is suspended and supported at the center of the lower part of the via a wire clamp (not shown).

The support arm 1 is arranged so that the lightning protection insulator series 17 is arranged in the middle of the first and second insulator series 11 and 12.
3 and the connecting yoke 15. This lightning protection insulator series 17 is formed by connecting in series a lightning protection insulator portion 18A formed by connecting a plurality of lightning protection insulators 18 and an insulator insulation portion 19A formed by connecting a plurality of normal lightning insulators 19 in series.

Each lightning protection insulator 1 in the lightning protection insulator series 17
Reference numeral 8 denotes a cap shape, and a current limiting element 20 made of a material whose main component is zinc oxide having a non-linear voltage-current characteristic is housed in a housing cylinder portion formed in a part thereof. As each normal insulator 19, a deep pleat-shaped fouling-resistant insulator is used.

The pair of arcing horns 21, 22 are attached to both ends of the insulator portion 19A of the lightning protection insulator series 17 and project in a direction orthogonal to the line direction of the power transmission line 16. And this pair of arcing horns 2
A predetermined air discharge gap G1 is formed between the tips of the first and the second parts.

In the V-suspension type lightning arrester device of the first embodiment, a lightning arrester insulator 17 including a plurality of lightning insulators 18 is provided in the middle of the pair of insulator insulators 11 and 12 made of the insulator insulator 14A. It is arranged. Therefore, when applying the lightning protection insulator device to the existing V suspension device, a pair of insulator pairs 11,
It is not necessary to replace both 12 from the insulator-insulator series 14A to the lightning-insulator series 17, and both insulator series 11 and 12 can be used as they are as the insulator-insulator series 14A, and the lightning-insulator series 1 can be used in the middle thereof.
7 may be provided.

By the way, in the construction of the V-hanging device, it is usually necessary to temporarily install the power transmission line 16 to eliminate the load and then install the lightning protection insulator string 17. However, in the case of this embodiment, since it is possible to attach the lightning protection insulator string 17 to the existing insulator string, it is not necessary to remove the electric wire.
Construction work can be simplified and construction costs can be reduced.

Further, in the V-suspension type lightning arrester device of this embodiment, when the lightning striker insulator 18 of the lightning striker insulator 17 releases the pressure due to an abnormal lightning strike exceeding the assumption, the lightning striker insulator 17 is released. A situation occurs in which it is refused. However, even in this case, since the power transmission line 16 is in a state of being supported by the pair of porcelain insulator chains 11 and 12 made of the insulator porcelain train 14A, there is no possibility that the power transmission line 16 will become unsupportable.

Further, in the V-suspension type lightning arrester device of this embodiment, the insulator portion 19A of the lightning arrester insulator unit 17 is provided.
Arcing horns 21 and 22 are attached to both ends of
An air discharge gap G1 is formed between the tips of both arcing horns 21 and 22. For this reason, even if the lightning arrestor insulator series 17 becomes long in the heavy pollution area, the lightning striker insulator series 17 is not vertically bent due to a vertical load. Therefore, the air discharge gap G1 can be easily adjusted.

In addition, in the V-suspension type lightning arrester device of this embodiment, the lightning arrestor string 17 is vertically extended between the support arm 13 of the steel tower and the connecting yoke 15. Therefore, on each lightning insulator 18, it is possible to prevent water from intensively flowing down from the outer periphery of the accommodating tubular portion along the outer surface of the insulator body at the time of rainfall or the like, and to prevent the risk of insulation deterioration. it can.

[0033]

Another Embodiment Next, another embodiment of the present invention will be described. First, in the second embodiment shown in FIG. 2, of the pair of insulator series 11, 12, only the first insulator series 11 is replaced by the lightning insulator series 17, from the insulator series 14A.
The second insulator string 12 is constituted as the insulator insulator string 14A. The lightning protection insulator unit 17 is formed by connecting a plurality of lightning protection insulators 18 in the same manner as in the first embodiment.
And an insulator portion 19A formed by connecting a plurality of normal insulators 19
And are connected in series.

Further, in the second embodiment, the first
Similar to the embodiment, a pair of arcing horns 21 and 22 are attached to both ends of the insulator portion 19A of the lightning protection insulator series 17 and protrude in a direction orthogonal to the line direction of the power transmission line 16. And this pair of arcing horns 2
A predetermined air discharge gap G1 is formed between the tips of the first and the second parts.

Therefore, in the second embodiment, when the lightning arrester insulator device is applied to the existing V-hanging device, the power transmission line 16 is still supported on the second insulator string 12 formed of the insulator insulator string 14A. , Only the first two insulator series 11 may be replaced by the lightning insulator series 17 from the insulator series 14A. Therefore, the construction can be simplified and the construction cost can be reduced.

Further, in the device of the second embodiment, even when the lightning insulator insulator 18 of the lightning insulator insulator conductor 17 is released due to an abnormal lightning strike and the lightning insulator insulator conductor 17 is disconnected, the power transmission line 16 is not connected to the insulator insulator conductor 14A. It is in a state of being supported by the second insulator string 12. Therefore, it is possible to prevent the transmission line 16 from becoming unsupportable.

Further, also in the second embodiment, as in the first embodiment, the air discharge gap G1 is formed between the arcing horns 21 and 22 at both ends of the insulator portion 19A of the lightning protection insulator string 17. . For this reason, even when the lightning arrestor insulator series 17 becomes long in the heavy pollution area, the lightning striker insulator series 17 does not have a large deflection as in the conventional case.
The air discharge gap G1 can be easily adjusted.

Next, in the third embodiment shown in FIG.
Similar to the second embodiment, only the first insulator string 11 is replaced with the lightning insulator string 17 from the insulator insulator string 14A.
The porcelain insulator series 12 is constructed as the insulator porcelain series 14A. The lightning protection insulator series 17 is configured by connecting in series a lightning protection insulator portion 18A formed by connecting a plurality of lightning protection insulators 18 and an insulator insulation portion 19A formed by connecting a plurality of normal lightning insulators 19 in series.

Further, in the third embodiment, the pair of arcing horns 21 and 22 are connected to the connecting portion between the lightning arrester insulator portion 18A and the insulator insulator portion 19A in the lightning insulator insulator series 17, and the charging side of the insulator insulator series 14A. It is arranged at each end. And this pair of arcing horns 21 and 22
A predetermined air discharge gap G1 is formed between the tip portions of the.

Therefore, also in the third embodiment, when the lightning arrester insulator device is applied to the existing V-hanging device as in the second embodiment, the lightning arrester insulator is sent to the second insulator insulator 12 which is the insulator insulator insulator 14A. With the electric wire 16 still supported, only the first two insulator series 11 may be replaced with the lightning protection insulator series 17 from the insulator insulation series 14A. Therefore, the construction can be simplified and the construction cost can be reduced.

Further, in the device of the third embodiment, even when the lightning striker insulator 18 of the lightning striker insulator series 17 is released due to an abnormal lightning strike and the lightning striker insulator series 17 is disconnected, the same as in the case of the second embodiment. The power transmission line 16 is in a state of being supported by the second insulator string 12 formed of the insulator string 14A. Therefore, it is possible to prevent the transmission line 16 from becoming unsupportable.

In addition, in this third embodiment, one arcing horn 22 is attached to the end portion of the insulator insulator series 14A on the voltage applying side. Therefore, even if the lightning protection insulator string 17 becomes long and bends in the heavy pollution area, the air discharge gap G1 can be easily adjusted without being affected by the bending. Further, the air discharge gap G1 can be set longer than the air discharge gap G1 of the second embodiment.

The present invention may be modified and embodied as follows. (A) In the first and second embodiments, the arcing horns 21 and 22 are extendedly arranged along the line direction of the power transmission line 16 to form the air discharge gap G1 between the arcing horns 21 and 22. thing. (B) In the first to third embodiments, the arcing horns 21 and 22 and the insulator portion 19A are omitted, and instead of the insulator portion 19A, the lightning arrester insulator 18A is attached, and the support arm 13 is connected to the charging side. Up to the gapless lightning arrester device formed by the lightning arrester 18A. (C) In the first embodiment, any one of the insulator series 1
Adjust the total number of the lightning protection insulators 14A according to the contamination state by reducing the number of the lightning protection insulators 14A of the intermediate lightning protection insulator series 17 by using the 1 and 12 insulation insulator series 14A as the lightning protection insulator series 17.

Further, the technical idea understood from the above embodiment will be described below. (1) At least one of the pair of porcelain insulators is formed of an insulator porcelain and the other is formed of the lightning protection insulator series,
The lightning protection insulator string is further arranged in the middle of both insulator strings.
V suspension type lightning arrester device described in 1. With this configuration,
It is possible to easily deal with a heavily polluted area.

[0045]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the following effects. According to the invention described in claim 1, claim 2 and claim 3, when the lightning arrester insulator device is applied to the existing V-suspension device, it is necessary to replace both the pair of insulator insulators with the lightning insulator insulators. There is no. Therefore, the construction can be simplified and the construction cost can be reduced.

According to the first, second and third aspects of the present invention, there is an abnormal lightning stroke exceeding the assumption,
Even if a situation occurs where the lightning protection insulator string is disconnected, the power transmission line can be supported by the at least one insulator insulator string without any trouble.

According to the invention described in claim 4 and claim 5, even if the pair of insulators becomes longer in the heavy pollution area, the V-suspension type can easily adjust the air discharge gap. It is to provide a lightning protection insulator device.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a first embodiment of a V suspension type lightning arrester device of the present invention.

FIG. 2 is a schematic front view showing a second embodiment of a V-suspension type lightning arrester device.

FIG. 3 is a schematic front view showing a third embodiment of a V-suspension type lightning arrester device.

FIG. 4 is a front view showing a conventional V-suspension type lightning arrester device.

FIG. 5 is an explanatory view showing the number of insulators according to the contamination classification in the conventional device.

[Explanation of symbols]

11 ... 1st insulator string, 12 ... 2nd insulator string, 13 ... Tower support arm, 14 ... Normal insulator, 14A ... Insulator insulator string,
16 ... Transmission line, 17 ... Lightning arrester series, 18 ... Lightning arrester, 1
8A ... Lightning protection insulator part, 19 ... Normal insulator, 19A ... Insulator part, 20 ... Current limiting element, 21 ... Arcing horn, 22 ...
Arcing horn, G1 ... Air discharge gap.

Claims (5)

[Claims] 1. A pair of insulator chains are mounted on a support arm of a steel tower at predetermined intervals, and the power-supply side end portions of both insulator chains are connected to each other, and a power transmission line is supported at the power-supply side connection portion. In the V-hanging device described above, at least one of the pair of porcelain insulators is constituted by a porcelain insulator series formed by connecting a plurality of normal porcelain insulators. A lightning protection insulator string in which a lightning protection insulator portion formed by connecting a plurality of insulators and an insulator insulation portion formed by connecting a plurality of normal insulators are connected in series is provided.
Hanging type lightning arrester device. 2. The V-suspension type lightning arrester device according to claim 1, wherein both of said pair of insulator insulators are formed of insulator insulators, and a conductor arrester insulator is arranged in the middle of both insulator insulators. 3. The V suspension according to claim 1, wherein one of the pair of porcelain insulators is made of an insulator porcelain, and the other porcelain insulator is replaced by an insulator porcelain and is made of a lightning insulator porcelain. Type lightning arrester device. 4. An arcing horn is provided at each end of an insulator portion of the lightning protection insulator series, and both arcing horns are opposed to each other through a predetermined air discharge gap. V suspension type lightning arrester device. 5. An arcing horn is arranged at each of a connecting portion between the lightning arrester portion and the insulator portion in the lightning insulator series and an end portion of the insulator side on the power-supply side, and both arcing horns have a predetermined air discharge. The device according to claim 3, which faces each other through a gap.
V suspension type lightning arrester device described in 1.