JPH06215655A - Gap adjustment in lightning arresting insulator device and gap gauge used in it - Google Patents

Abstract

PURPOSE:To provide a gap adjusting method and a gap gauge in a lightning arresting insulator device by which an aerial discharge gap can be adjusted easily and safely by single-hand work and the occurrence of deviation in the aerial discharge gap can be prevented after it is adjusted and set. CONSTITUTION:In a lightning arresting insulator device formed by arranging a prescribed aerial discharge gap G between an electro-mechanical side discharge electrode 21 on the lower end of a support insulator 1 to support a power transmission line 9 and an earthing side discharge electrode 26 on the lower end of a lightning arresting insulator 14, both end locking parts 32 and 33 of a gap gauge 30 are locked on both the discharge electrodes 21 and 26. In this condition, an installing position of one discharge electrode 21 is changed, and the aerial discharge gap G is adjusted/set in a prescribed distance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gap adjusting method for a lightning arrester device and a gap gauge used for the method.

[0002]

2. Description of the Related Art Generally, in a lightning arrester device, a power transmission line is supported by a support arm of a steel tower via a support insulator, and a lightning arrester with a built-in resistance element is suspended on the support arm via a mounting adapter. Lower supported. A discharge electrode on the charging side can be attached to the lower end of the support insulator, and a discharge electrode on the ground side is attached to the lower end of the lightning arrestor, and a predetermined air discharge gap is provided between both discharge electrodes. Has been.

Conventionally, in this type of lightning protection insulator device, when adjusting the air discharge gap, an operator climbs up a tower and puts a gap gauge between both discharge electrodes with one hand while By using a hand tool such as a wrench, the mounting position of the discharge electrode on the charging side is changed to adjust and set the air discharge gap to a predetermined distance.

[0004]

However, in this conventional gap adjusting method, it is necessary for an operator to carry out the adjusting work at a high place while holding the gap gauge with one hand and the tool with the other hand. Therefore, there is a problem that the adjustment work is difficult and dangerous.

Further, in this conventional gap adjusting method,
Since only the gap gauge is applied between the two discharge electrodes, there is also a problem that the air discharge gap is apt to be distorted after the attachment position of the discharge electrode is changed and the bolt is tightened.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and its purpose is to easily and safely adjust the air discharge gap by one-handed work. It is an object of the present invention to provide a gap adjusting method in a lightning arrester device and a gap gauge used for the same, which can be performed in addition to the above, and can prevent the air discharge gap from being distorted after the adjustment setting.

[0007]

In order to achieve the above object, in the invention of a gap adjusting method for a lightning arrester device according to claim 1, a transmission line is supported by a supporting arm of a steel tower via a supporting insulator. , The support arm suspends and supports a lightning protection insulator having a built-in resistance element, and a discharge electrode on the voltage-charging side is attached to the lower end of the support insulator, and a discharge electrode on the ground side is attached to the lower end of the lightning protection insulator. In a lightning arrester device in which a predetermined air discharge gap is provided between discharge electrodes, a mounting position of one of the discharge electrodes is changed in a state in which a gap gauge is locked between the two discharge electrodes, It is characterized by adjusting the discharge gap.

Further, in the invention of the gap gauge used in the gap adjusting method according to claim 2, the transmission line is supported by the support arm of the steel tower through the support insulator, and the support arm has a built-in resistance element. Suspend and support the insulator, and attach the discharge electrode on the charging side to the lower end of the support insulator,
In a lightning arrester device in which a discharge electrode on the ground side is attached to the lower end of the lightning arrestor, and a predetermined air discharge gap is provided between both discharge electrodes, it can be engaged with and disengaged from both ends of the gauge body. A locking portion is provided, and the air discharge gap is adjusted by changing the mounting position of one of the discharge electrodes with the locking portion locked to both discharge electrodes. To do.

[0009]

In the gap adjusting method for the lightning arrester device constructed as described above, when adjusting the air discharge gap, the worker climbs up to the tower and uses one of the discharge electrodes with a tool such as a spanner. Loosen the mounting bolt of.
After that, while changing the mounting position of one of the discharge electrodes, both ends of the gap gauge are locked to the discharge electrodes, and the gap gauge is interposed between the discharge electrodes. In this state, tighten the mounting bolt with a tool to fix the other discharge electrode at the specified mounting position, and then remove the gap gauge between both discharge electrodes to adjust the air discharge gap to the specified distance. You can

Therefore, it is possible to easily and safely adjust the air discharge gap by one-handed work, rather than by two-handed work. In addition, since the gap gauge is inserted between both discharge electrodes without applying it, there is no possibility that the air discharge gap will be misaligned after the discharge electrode mounting bolts are tightened. The distance can be adjusted accurately and set.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a gap adjusting method and a gap gauge used in the lightning insulator device embodying the present invention will be described in detail below with reference to FIGS.

As shown in FIGS. 1 to 3, a suspension metal fitting 2 is attached to a support arm 1 of a steel tower, and a horn mounting metal fitting 4 is connected to the suspension metal attachment 2 via a U clevis 3. . A support insulator 5 is suspended and supported on the horn mounting member 4 so as to be swingable in a line direction and a direction orthogonal to the line direction. In this embodiment, a suspension insulator string is formed by connecting a plurality of suspension insulators 6 in series. There is. A horn mount 7 is connected to the lower end of the support insulator 5, and an electric wire clamp 10 for supporting the power transmission line 9 is attached to the horn mount 7 via a connecting link 8. Both horn mounting brackets 4,
Arcing horns 11 and 12 are attached to 7, and the arcing horns 11 and 12 reduce damage to the support insulator 5 when a flashover occurs due to stains on the insulator.

A mounting adapter 13 is cantileveredly fixed to the tip of the support arm 1 and extends horizontally in the same direction as the line. A lightning protection insulator 14 is suspended and fixed to the lower surface of the tip of the mounting adapter 13 by a plurality of bolts. The lightning protection insulator 14 has a voltage-current characteristic mainly composed of a pressure-resistant insulating cylinder (not shown) formed in a cylindrical shape by a tension-resistant material such as FRP, and zinc oxide (ZnO) housed in series inside thereof. Non-linear resistance element 15, cap-shaped ground-side and charge-side electrode metal fittings 16 and 17 fitted and fixed to both ends of the pressure-proof insulating cylinder, and mold rubber provided on the outer periphery of the pressure-proof insulating cylinder. It is composed of 18 and. Arcing rings 19 and 20 are provided so as to face both electrode fittings 16 and 17 of the lightning protection insulator 14, respectively.
20 prevents explosion and disconnection of the lightning protection insulator 14 from an arc generated by a follow current when the resistance element 15 is deteriorated or damaged.

An arc-shaped discharge electrode 21 on the power-supply side, which is arcuate, is attached to a horn-mounting metal fitting 7 on the power-supply side under the support insulator 5 so as to be pivotally adjustable by a pin 23 via a mounting plate 22. It is fixed at a predetermined adjusting position by screwing a mounting bolt 25 through 24. Further, an arc-shaped ground-side discharge electrode 26 is attached to an electrode-side electrode fitting 17 at the lower end of the lightning protection insulator 14 via a mounting plate 27. Then, the discharge electrodes 21 on the charging side and the ground side,
A predetermined air discharge gap G is provided between the discharge portions of 26.

Next, the structure for adjusting the air discharge gap G will be described. A ring-shaped engagement portion 28 is provided outside the discharge portion of the charging side discharge electrode 21.
A ring-shaped engaging portion 29 is also provided inside the discharge portion of the ground side discharge electrode 26 so as to face with the discharge portion. A gap gauge 30 is locked between the discharge parts of the discharge electrodes 21 and 26. In this state, the mounting position of the charging side discharge electrode 21 can be pivotally adjusted to adjust and set the air discharge gap G. It is like this.

As shown in FIGS. 4 and 5, in the gap gauge 30 of this embodiment, the gauge body 31 is made of a synthetic resin material and formed into a round bar shape having a predetermined length. At both ends of the gauge body 31, the engaging portions 2 of the discharge electrodes 21 and 26 are provided.
Locking portions 32 and 33 that can be engaged and disengaged with respect to 8 and 29 are provided. One of the locking portions 32 is formed into a substantially circular hook shape on the front surface, and the other locking portion 33 is formed into a substantially L-shaped hook shape in a plane. Then, after the circular hook-shaped engaging portion 32 is engaged with the engaging portion 29 of the ground-side discharge electrode 26, the L-shaped hook-like engaging portion 33 is engaged with the engaging portion 28 of the power-supply-side discharge electrode 21. By stopping, the gauge body 31 can be disposed between the discharge electrodes 21 and 26.

Next, the operation of the gap adjusting method and the gap gauge used therefor in the lightning arrester device constructed as described above will be described. Now, in the gap adjusting method of this embodiment, when adjusting the air discharge gap G, the worker climbs to the steel tower and loosens the mounting bolt 25 of the discharge electrode 21 with a tool such as a spanner. After that, while adjusting the discharge side discharge electrode 21 around the pin 23, the both end locking portions 3 of the gap gauge 30 are adjusted.
2 and 33 are engaged with the engaging portions 28 and 29 of the discharge electrodes 21 and 26, and the gap gauge 30 is attached to the discharge electrodes 21 and 26.
It is placed between 26. In this state, the mounting bolt 25 is tightened with a tool to fix the discharge electrode 21 on the charging side at a predetermined mounting position, and then the gap gauge 30 is removed from between the discharge electrodes 21 and 26.
Can be adjusted and set to a predetermined distance.

Therefore, according to the gap adjusting method of this embodiment, the air discharge gap G can be easily and safely adjusted by one-handed operation, not by two-handed operation. In addition, since the gap gauge 30 is interposed between the discharge electrodes 21 and 26 without applying the gap gauge 30, the air discharge gap G is distorted after the attachment bolt 25 of the charging side discharge electrode 21 is tightened. There is no fear. Therefore, the air discharge gap G can be accurately adjusted and set to a predetermined distance.

[0019]

Another Embodiment Next, another embodiment of the present invention will be described with reference to FIGS. First, the second shown in FIG. 6 and FIG.
Explaining an embodiment, a transmission line support insulator 42 made of a long insulator is suspended and fixed by a plurality of bolts at a tip portion of a support arm 41 of a steel tower, and a transmission line is connected to a lower end portion of the transmission line via a wire clamp 43. 44 is supported. A mounting bracket 45 is fixed to the tip of the support arm 41 and extends horizontally in the direction orthogonal to the line direction. A lightning arrester 46 is suspended from the lower portion of the tip of the mounting bracket 45 by a plurality of bolts.

As in the first embodiment described above, the lightning protection insulator 46 has a withstand voltage insulating cylinder (not shown) made of a tension-resistant material such as FRP, and the voltage-current characteristic housed therein is non-linear. It is composed of a resistance element 47, ground-side and charge-side electrode metal fittings 48 and 49 fitted and fixed to both ends of the pressure-resistant insulating cylinder, and a mold rubber 50 provided on the outer periphery of the pressure-resistant insulating cylinder. Circular arcing rings 51, 52 are provided on both electrode fittings 48, 49 of the lightning protection insulator 46 so as to face each other, and by these arcing rings 51, 52,
When the resistance element 47 is deteriorated or damaged, the explosion and disconnection of the lightning protection insulator 46 is prevented from the arc generated by the follow current.

Electric wire clamp 4 at the lower end of the support insulator 42
A horn-shaped discharge electrode 53 on the charging side is attached to 3 via an attachment body 54. In addition, lightning protection insulator 46
A ground-side discharge electrode 55 having a horn shape is movably mounted on a lower end of the power-supply-side electrode fitting 49 through a mounting plate 56, and a mounting bolt 58 is screwed through a long hole 57. Is fixed in a predetermined adjusting position by. A predetermined air discharge gap G is provided between the discharge portions of the charging side and grounding side discharge electrodes 53, 55.

A ring-shaped engagement portion 59 is formed at the tip of the charging side discharge electrode 53, and a ring-shaped engagement is also made at the tip of the ground side discharge electrode 55 so as to face the engagement portion 59. The part 60 is formed. Further, in this embodiment, the gauge body 62 of the gap gauge 61 is formed of a synthetic resin material into a round bar shape having a predetermined length. Then, at both ends of the gauge body 62, the discharge electrodes 53,
Almost flat surface L that can be engaged with and disengaged from the engaging portions 59 and 60 of 55
Hook-shaped locking portions 63, 64 are provided.

In the gap adjusting method of this embodiment, when the air discharge gap G is adjusted, the worker climbs up the tower and operates a spanner or the like in the same manner as in the first embodiment. The mounting bolt 58 of the ground-side discharge electrode 55 is loosened with a tool. Then, while adjusting the movement of the ground side discharge electrode 55 within the range of the long hole 57, the gap gauge 61
Both end locking portions 63 and 64 are locked to the engaging portions 59 and 60 of both discharge electrodes 53 and 55, and the gap gauge 61 is interposed between the discharge electrodes 53 and 55. In this state, the mounting bolt 58 is tightened with a tool to fix the ground-side discharge electrode 55 to a predetermined mounting position, and then both discharge electrodes 5
By removing the gap gauge 61 from between 3, 55, the air discharge gap G can be adjusted and set to a predetermined distance.

Therefore, also in the gap adjusting method according to the second embodiment, the air discharge gap G can be easily and safely adjusted by one-handed operation instead of both-handed operation. Further, since the gap gauge 61 is interposed between the discharge electrodes 53 and 55 without applying the gap gauge 61, the air discharge gap G may be distorted after the mounting bolt 58 of the ground side discharge electrode 55 is tightened. Instead, the air discharge gap G can be accurately adjusted and set to a predetermined distance.

Next, in the third embodiment shown in FIG.
The gauge body 66 of the gap gauge 65 is formed of a synthetic resin material into a flat plate shape having a predetermined length. Then, bolts are screwed into both ends of the gauge body 66 to provide round rod-shaped engaging portions 67 and 68 which can be engaged and disengaged with the discharge electrodes 21, 53, 26 and 55.

Further, in the fourth embodiment shown in FIG. 9,
The gauge body 70 of the gap gauge 69 is formed of a synthetic resin material into a round bar shape having a predetermined length, and the threaded portions 7 are provided at both ends thereof.
1 is provided. Further, at both ends of the gauge body 70, hook-shaped and plate-shaped locking bodies 72, 7 as locking portions that can be engaged with and disengaged from both discharge electrodes 21, 53, 26, 55.
3 is inserted and fixed by a wing nut 74 screwed to the screw portion 71.

Further, in the fifth embodiment shown in FIG. 10, the gauge body 76 of the gap gauge 75 is composed of two plate members 76A and 76B made of a synthetic resin material and having a predetermined length. A plurality of permanent magnets 77 are provided on the opposing surfaces of the plate members 76A and 76B, and the plate members 76A and 76B are detachably joined by attraction of the permanent magnets 77. Further, recessed grooves 78 and 79 as engaging portions that can be engaged with and disengaged from the discharge electrodes 21, 53, 26 and 55 are formed at both ends of the facing surfaces of the plate members 76A and 76B.
By joining B, the discharge electrodes 21, 53, 26 and 55 can be sandwiched and locked between the concave grooves 78 and 79.

Therefore, also in the gap gauges 65, 69 and 75 of the third to fifth embodiments, the above-mentioned first gap gauge is used.
Also, as in the second embodiment, the structure of the gap gauge is simple, and the discharge electrodes 21, 53, 26, 55 can be easily engaged and disengaged to be used for adjusting the gap G.

The present invention is not limited to the configuration of the above-described embodiment, and for example, the shape of the engaging portions on both discharge electrodes and the shape of the engaging portions at both ends of the gap gauge may be appropriately changed. It is also possible to change the configuration of each part and embody it without departing from the spirit of the present invention.

[0030]

Since the present invention is configured as described above, it has the following excellent effects.

According to the gap adjusting method in the lightning arrester device of the first aspect, the air discharge gap is adjusted by
This can be easily and safely performed by one-handed work, and it is possible to prevent the air discharge gap from being distorted after adjustment and setting.

Further, according to the gap gauge used in the gap adjusting method of the lightning arrester device according to the second aspect, the structure is simple and the discharge electrode can be easily engaged with and disengaged from the discharge electrode.

[Brief description of drawings]

1 is a front view showing a first embodiment of a gap adjusting method in a lightning arrester device embodying the present invention.

FIG. 2 is a partial front view showing, in an enlarged manner, a mounting configuration of a charging side discharge electrode in the lightning arrester device of FIG.

3 is a side view showing a lightning arrester and a ground side discharge electrode portion in the lightning arrester device of FIG. 1. FIG.

FIG. 4 is a front view showing a first embodiment of the gap gauge used in the gap adjusting method of FIG.

FIG. 5 is a bottom view of the gap gauge.

FIG. 6 is a front view showing a second embodiment of the gap adjusting method in the lightning arrester device embodying the present invention.

7 is a sectional view showing a second embodiment of the gap gauge used in the gap adjusting method of FIG.

FIG. 8 is a sectional view showing a third embodiment of the gap gauge.

FIG. 9 is a sectional view showing a fourth embodiment of the gap gauge.

FIG. 10 is a sectional view showing a fifth embodiment of the gap gauge.

[Explanation of symbols]

1 ... Support arm in the lightning arrester device of the first embodiment, 5
... Supporting insulator, 9 ... Transmission line, 14 ... Lightning arrester, 15 ... Resistor element, 21 ... Discharge electrode on charging side, 25 ... Mounting bolt, 2
6 ... Ground-side discharge electrode, 28, 29 ... Engaging portion, 30 ... Gap gauge of the first embodiment, 31 ... Gauge body, 32,
33 ... Locking part, 41 ... Support arm in the lightning protection insulator device of the second embodiment, 42 ... Support insulator, 44 ... Power transmission line, 46 ...
Lightning arrester, 47 ... Resistor element, 53 ... Discharge electrode on the charging side,
55 ... Discharge electrode on the ground side, 58 ... Mounting bolts, 59, 6
0 ... Engaging portion, 61 ... Gap gauge of the second embodiment, 62
... Gauge body, 63, 64 ... Locking portion, 65 ... Gap gauge of the third embodiment, 66 ... Gauge body, 67, 68 ... Locking portion, 69 ... Gap gauge of fourth embodiment, 70 ... Gauge body, 72, 73 ... locking body as locking portion, 75 ... gap gauge of the fifth embodiment, 76 ... gauge body, 78,
79 ... Recessed groove as locking portion, G ... Air discharge gap.

Claims (2)

[Claims] 1. A power transmission line is supported on a support arm of a steel tower through a support insulator, and a lightning protection insulator having a built-in resistance element is suspended from the support arm, and a discharge on the power-supply side is provided at a lower end of the support insulator. In a lightning arrester device in which an electrode is attached, a discharge electrode on the ground side is attached to the lower end of the lightning arrestor, and a predetermined air discharge gap is provided between both discharge electrodes, a gap gauge is locked between the both discharge electrodes. With the
A method for adjusting a gap in a lightning arrester device, characterized in that the mounting position of one of the discharge electrodes is changed to adjust the air discharge gap. 2. A power transmission line is supported on a support arm of a steel tower via a support insulator, and a lightning protection insulator having a built-in resistance element is hung and supported on the support arm, and a discharge on the charging side is provided at a lower end of the support insulator. In addition to mounting the electrodes, the grounding side discharge electrode is attached to the lower end of the lightning arrestor, and a predetermined air discharge gap is provided between both discharge electrodes. A locking part that can be engaged and disengaged is provided, and with this locking part locked to both discharge electrodes, the air discharge gap can be adjusted by changing the mounting position of one of the discharge electrodes. A gap gauge for use in a method for adjusting a gap in a lightning arrester device characterized by the above.