JP2510911Y2 - Lightning-proof horn insulator device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention is designed to immediately discharge an abnormally large current due to an electric shock to a ground by a lightning protection function, and to suppress and block a follow-up current. The present invention relates to a lightning protection horn insulator device capable of preventing a permanent ground fault.

[Conventional technology]

As shown in FIG. 10, a conventional lightning protection horn insulator device suspends a suspension insulator string 6 in which a large number of suspension insulators are connected in series to a support arm 1 of a steel tower via an upper suspension metal fitting J1. An electric wire clamp 15 was attached to the lower end through a lower hanging metal fitting J2, and the transmission line 14 was supported by the clamp 15. or,
The lower hanging metal fitting J2 is connected to the lower end of the suspension insulator string 6, a horn mounting metal fitting 8 connected to the connecting link 7 by a connecting pin 9, and a horn mounting metal fitting 8. It is composed of a strap 12 connected by a pin 30, and an arm portion of the horn mounting bracket 8.
8a, the discharge electrode 17 on the charging side is supported.

On the other hand, a lightning protection insulator 20 is attached to the support arm 1 via a mounting adapter 19, and a ground-side discharge electrode 23 provided at the tip of the support arm 1 and a discharge electrode 17 on the charging side and a predetermined air discharge gap G are provided. Are facing each other.

[Problems to be solved by the device]

However, in the above-mentioned conventional lightning protection horn insulator device, the interval L between the upper and lower connecting pins 9 and 30 of the lower horn mounting bracket 8 constituting the lower hanging bracket J2 is as short as about 55 mm, so as shown in FIG. The weight of the discharge electrode 17 on the charging side is W, and the connecting pin
When the horizontal distance from 9,30 to the center of gravity O is H, the bending moment M (= H × W) due to its own weight W acts on the connecting pins 9,30 by the principle of leverage. There was a problem. That is, connect both connecting pins 9 and 30 in the P arrow direction and Q direction.
Since the forces Fp and Fq that move in the direction of the arrow become large, the discharge electrode 17 will be discharged when the air discharge gap G is adjusted when the lightning protection horn insulator device is installed on the steel tower or when the transmission line 14 receives wind pressure. Not only does the adjustment work of the discharge gap G become difficult as a result of large fluctuations in the air discharge gap G, which makes the mounting state unstable due to large swinging in the vertical direction around the base end. There was a problem that the discharge characteristics after installation became unstable.

Further, the upper suspension fitting J1 and the lower suspension J2 are provided with arc horns 10 and 11 for preventing the surface flashover of the support insulator 6.
Is supported, but the lower arc horn 11 is the discharge electrode.
Since it is lighter than 17, it is difficult to reduce the vertical swing of the transmission line 14 described above. Due to this swing, the discharge electrode 17 easily collides with the power transmission line 14. In order to avoid this, the strap 12 must be made longer than necessary in the vertical direction.

The purpose of this invention is to shorten the work of adjusting the discharge gap G when installing the lightning protection horn insulator device, and to suppress the swinging operation of the discharge electrode on the power-supply side when the transmission line receives wind pressure after installation, thereby performing discharge. An object of the present invention is to provide a lightning protection horn insulator device capable of maintaining a substantially constant air discharge gap of electrodes and stabilizing a column mounting state and discharge characteristics.

[Means for solving the problem]

In order to achieve the above object, the invention according to claim 1 hangs a support insulator on a support arm of a steel tower, and connects a horn mounting bracket to a lower end of the support insulator by a connecting pin so as to be rotatable. Then, a strap is integrally or separately fixed to the horn mounting bracket, an electric wire clamp is rotatably connected to a lower end portion of the strap by a connecting pin, and the arm section connected to the horn mounting bracket is connected to the horn mounting bracket. The lightning side discharge electrode facing the grounding side discharge electrode of the lightning arrester supported on the supporting arm side is supported by a cantilever, and the arm side opposite to the arm part supports the discharge side discharge electrode. The means to support the balance weight that balances with the electrode is taken.

The invention according to claim 2 is the device according to claim 1, wherein the connecting link and the horn mounting member are integrally fixed.

[Action]

In this invention, since the horn mounting bracket and the strap are integrally connected, the distance between the connecting pins at the upper and lower ends thereof becomes long, and therefore the connecting pin 9, due to the weight of the discharge electrode.
Force to move 16 in the P and Q arrow directions
As a result, Fp and Fq become smaller, which makes it difficult for the discharge electrode to oscillate vertically, making it easier to adjust the discharge gap when installing the lightning protection horn insulator device, and the power transmission line oscillated due to wind pressure. Also in this case, the discharge gap is kept substantially constant, and the columnar state and discharge characteristics are stabilized.

Further, in this invention, it is possible to surely avoid the swinging discharge electrode from colliding with the power transmission line without lengthening the strap in the vertical direction more than necessary.

〔Example〕

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
It will be described with reference to the drawings.

As shown in FIG. 2, a connecting fitting 2 is fixed to the tip of a support arm 1 of a steel tower, and a suspension insulator 5 is connected to the connecting tool 2 in series via a U-clevis link 3 and a horn mounting fitting 4. A suspension insulator string 6 as a supporting insulator is supported so as to be swingable in the line direction and the orthogonal direction. In this embodiment, the connecting fitting 2, the U-clevis link 3 and the horn mounting fitting 4 constitute an upper hanging fitting J1.

A connecting link 7 is rotatably connected to a lower end portion of the suspension insulator string 6, and a horn mounting member 8 is rotatably connected to the lower end portion by a connecting pin 9. Further, an arc horn 10 is attached to the horn mounting member 4 for preventing burning of the suspension insulator string 6 when the surface flashes.

A strap 12 is provided at the center of the lower horn mounting bracket 8.
Is connected to the mounting member 8 by a bolt 13, and a wire clamp 15 for supporting the power transmission line 14 is connected to a lower end portion of the strap 12 by a connecting pin 16 so as to be rotatable in the line direction. The lower horn mounting bracket 8 and strap 12 are straps
Mutual rotation is blocked by a protrusion 12a provided on the inner side of 12 to form a fixed connection. The base end portion of the discharge electrode 17 on the charging side is fastened and fixed to the arm portion 8a on the right side of the lower horn mounting member 8 with a bolt 18 and extends in the line direction. In this embodiment, the connecting link 7, the horn mounting member 8 and the strap 12 constitute a lower hanging member J2.

A balance weight 33 that balances the weight of the discharge electrode 17 is connected to the left arm portion 8b of the horn mounting member 8. The balance weight 33 faces the arc horn 10 on the grounding side, and also has a function of preventing a surface flashover of the insulator.

The vertical distance L1 between the connecting pins 9 and 16 located at the upper and lower ends of the horn mounting bracket 8 and the strap 12 is set to about 150 to 180 mm, which is about three times as large as that of the conventional (55 mm) in this embodiment. are doing.

On the other hand, a mounting adapter 19 is supported on the supporting arm 1 in a cantilever manner, and a lightning protection insulator 20 is fixed to the tip of the mounting arm 19 by a bolt with a flange fitting 21 on the ground side.
Further, the discharge side electrode 23 on the ground side is supported by the electrode fitting 22 on the charging side. Further, the voltage inside the lightning protection insulator 20 is −
Current limiting element 24 mainly composed of zinc oxide whose current characteristics are nonlinear
Is stored. Further, an air discharge gap G is provided between the discharge electrodes 17 and 23. In addition, reference numerals 25 and 26 are arcing rings for preventing burnout at the time of internal creeping of the lightning protection insulator 20.

Next, the operation of the lightning-resistant horn insulator device configured as described above will be described.

Now, when an abnormally large current is applied to the transmission line 14 due to an electric shock, this current is discharged from the wire clamp 15, the strap 12, the lower horn mounting bracket 8 and the discharge electrode 17 on the charging side by the discharge gap G.
Is discharged to the discharge electrode 23 on the ground side via the metal fitting 22, flows from the electrode fitting 22 to the current limiting element 24 of the lightning protection insulator 20, flows to the support arm 1 via the flange fitting 21 and the mounting adapter 19, and further flows to the steel tower and is discharged to the ground. It The subsequent current generated thereafter is the current limiting element
It is suppressed and cut off by 24 and the discharge gap G.

Now, in the above embodiment, as shown in FIG. 1, a strap having a horn mounting member 8 and a protrusion for preventing rotation is provided inside.
12 and 11 are fixedly connected with each other by the bolt 13, and the distance L1 between the connecting pins 9 and 16 located at both ends of both members is about three times as long as the conventional one. Therefore, the bending moment due to the weight W of the discharge electrode 17 is increased. It is difficult for M (= H × W) to act on the connecting pins 9 and 16,
The forces Fp and Fq for moving both connecting pins 9 and 16 in the P arrow direction and the Q arrow direction are reduced, which not only facilitates the adjustment work of the discharge gap G when installing the lightning protection horn insulator device, but also When the electric wire oscillates due to wind pressure or the like, the oscillating range of the discharge electrode 17 is suppressed, and the air discharge gap G is maintained substantially constant.

In particular, in the above embodiment, the power transmission line of the discharge electrode 17 that swings without making the strap 12 longer than necessary in the vertical direction.
The collision to 14 can be avoided definitely.

Further, in the above-described embodiment, the balance weight 33 is provided on the arm portion 8a of the horn mounting member 8, so that the swinging of the discharge electrode 17 in the vertical direction is suppressed, and the column mounting state can be stabilized.

Next, another example of this invention will be described with reference to FIGS.

In this embodiment, as shown in FIG. 4, the upper end of the connecting link 7 is rotatably connected to the lower end of the lowermost suspension insulator 5 by a connecting pin 31, and the horn is connected to the lower end of the connecting link 7. The upper edge of the middle portion of the mounting member 8 is engaged and fixed by a pair of left and right bolts 32. As shown in FIG. 6, the connecting link 7 has a pair of inverted T-shaped link pieces 7
It is composed of A and 7B and a connecting piece 7C that connects both link pieces to each other.

Further, the horn mounting member 8 and the strap 12 are rotatably connected by a connecting pin 30. The distance L2 between the connecting pins 31 and 30, which is the point of action of the bending moment of the discharge electrode 17, is increased to prevent the discharge electrode 17 from swinging in the vertical direction.

In this embodiment, arm portions 8b and 8c are formed on the side of the horn mounting member 8 opposite to the discharge electrode 17, and the balance weight 33 is attached to the tip portion thereof. The discharge electrode 17 includes a support rod 34 fixed to the horn mounting bracket 8 by a bolt 18, and a mounting plate 35 attached to the tip of the support rod 34.
It is composed of annular discharge parts 36 and 37 connected in parallel to the mounting plate, and a spacer 38 interposed between both discharge parts. Further, as shown in FIG. 5, the discharge parts 36 and 37 are mounted by being displaced laterally from the line, and one of the balance weights 33 is moved laterally so that the discharge electrode 17 and the weight are balanced. It is overhanging.

This invention can be embodied as follows.

(1) As shown in FIG. 7, the horn mounting bracket 8 and the strap 12 are integrally formed. In this case as well, the same operational effects as those of the above-described embodiment are obtained.

(2) As shown in FIG. 8, the horn mounting bracket 8 and the strap 12 are integrally formed, and the arm 12b for mounting the discharge electrode 17 is provided on the strap 12.

(3) As shown in FIG. 9, the connecting link 7, the horn mounting member 8 and the strap 12 are integrally formed, and the discharge electrode 17 is supported by the arm portion 8a of the horn mounting mounting member 8. In this case, the distance between the connecting pins 31 and 16 becomes longer than that in the above-described embodiment, so that the stability of the discharge electrode is further increased.

(4) In the embodiment shown in FIG. 4, the connecting link 7 is provided with an arm portion, and the discharge electrode 17 is supported there.

[Effect of device]

As described above in detail, since the horn mounting bracket and the strap and / or the connecting link are integrally formed in this device, the bending moment due to the weight of the discharge electrode acts on the connecting pins at the upper and lower ends for mounting the discharge electrode. Difficult, this results in
Not only is it easy to adjust the discharge gap when installing a lightning protection horn insulator device, but the swinging action of the discharge electrode is suppressed even when the power transmission line swings due to wind pressure, etc., and the air discharge gap is kept almost constant. Therefore, there is an effect that the mounted state and the discharge characteristics can be stabilized.

Further, in this invention, it is possible to surely avoid the swinging discharge electrode from colliding with the power transmission line without lengthening the strap in the vertical direction more than necessary.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a main part embodying the present invention, FIG. 2 is a front view showing the entire lightning protection horn insulator device, and FIG. 3 is a voltage application side and grounding of FIG. Side view of the discharge electrode on the side, FIG. 4 is a front view of the main part showing an embodiment embodying the present invention, FIG.
FIG. 6 is a plan view of the same part, FIG. 6 is an enlarged perspective view of a connecting link and a horn mounting bracket, FIGS. 7 and 8 are partial front views showing another example of the present invention, and FIG. FIG. 10 is a front view of a main part showing another example, FIG. 10 is a front view showing a conventional example, and FIG. 11 is a partial front view showing the same conventional example. 1 ... Support arm, 6 ... Suspended insulator string as a support insulator, 7 ... Connection link, 8 ... Horn mounting bracket, 8a ...
Arm part, 9,16,30 …… Connecting pin, 12 …… Strap, 1
3 …… Bolt, 14 …… Transmission line, 15 …… Electric wire clamp, 17
...... Discharge electrode on the charging side, 19 ...... Mounting adapter, 20 ...... Lightning insulator, 23, 33 ...... Balance weight, ... Discharge electrode on the ground side, J1 ...... Upper hanging metal fitting, J2 ...... Lower hanging Metal fittings, G ...
… Air discharge gap, L1, L2 …… Distance.

Front page continuation (72) Inventor Yasuyuki Tsuboi, 11 from Higashiishigame, Kaimei character, Onishi City, Aichi Prefecture (72) Inventor, Yuji Kudo, 20 from 1 Otaki, Onada Town, Tajimi City, Gifu Prefecture

Claims (2)

(57) [Scope of utility model registration request] 1. A support insulator (6) is suspended from a support arm (1) of a steel tower, and a horn mounting bracket (8) is connected to a lower end of the support insulator (8) via a connecting pin (9). The horn mounting bracket is strapped (12).
Arm integrally or separately fixed, the wire clamp (15) is rotatably connected to the lower end of the strap (12) by a connecting pin (16), and is further connected to the horn mounting bracket (8). The portion (8a) cantileverly supports the discharge electrode (17) on the power-supply side, which faces the discharge electrode on the ground side of the lightning arrester supported on the support arm (1) side with a predetermined discharge gap, and the arm portion ( A balance weight (33) that balances with the discharge electrode (17) on the charging side on the arm (8b) on the side opposite to 8a).
A lightning protection horn insulator device characterized by supporting the. 2. The connecting link (7) according to claim 1,
And a horn mounting bracket (8) are integrally fixed to each other, a lightning protection horn insulator device.