JPH0561922U - Electrode mounting bracket for lightning protection horn device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electrode mounting bracket having a discharge electrode that can be mounted easily and in a short time when installing a lightning protection horn. [Structure] A support insulator 2, an arc horn 8 and a discharge electrode 10 attached to the support insulator 2, and the support arm 1
Is provided between the discharge electrode 17 and the discharge electrode 17 supported by the metal fitting 15 at the lower end portion of the lightning protection horn 13, the lightning protection horn 13 being suspended and fixed to the tip end of the lightning protection horn 13. In the lightning protection horn device including the air discharge gap G, the electrode mounting bracket 9 is the support insulator 2 for the power transmission line.
Arc horn 19 attached to the cap metal fitting 26 of
And the discharge electrode 10 are integrally formed. To attach the discharge electrode 10 to the power transmission line support insulator 2,
The existing ring-shaped arc horn may be removed, and instead, the electrode mounting bracket 9 on which the discharge electrode 10 and the balance weight 20 are formed may be mounted on the support insulator 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, when a surge current due to a lightning strike enters an electric line, it is quickly discharged to the ground, and the subsequent current of the commercial frequency that is generated thereafter is suppressed and cut off to prevent a ground fault accident. The present invention relates to a lightning protection horn device capable of performing the above, and particularly to an electrode mounting metal fitting thereof.

[0002]

[Prior Art]

 In recent years, lightning protection horns have been used in transmission lines to prevent power outages due to lightning surge currents. However, when this lightning protection horn is newly installed and combined with the existing transmission line support insulator, a discharge electrode facing the discharge electrode of the lightning protection horn must be attached to the transmission line support insulator. Conventionally, when attaching the discharge electrode, as shown in FIG. 4, the existing connection fitting 22 between the support insulator 2 and the transmission line clamp 11 is replaced with the connection fitting 23 for supporting the discharge electrode, and the discharge electrode 24 is attached. ing.

[0003]

[Problems to be solved by the device]

 However, in the above technique, the power transmission line 6 must be temporarily lowered in order to replace the existing connection fitting 22 with the connection fitting 23 for attaching the discharge electrode. Therefore, there is a problem that replacement takes a very long time and the power transmission line must be put into a power failure state.

The present invention has been made in order to solve the above problems, and an object thereof is to easily attach a discharge electrode to a transmission line support insulator during installation of a lightning protection horn in a short time. Is to be able to.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the first invention, a support insulator for a transmission line suspended on a support arm of a steel tower, an arc horn and a discharge electrode attached to the support insulator, and a tip portion of the support arm are provided. A lightning protection horn that includes a lightning protection horn that is suspended and fixed, a discharge electrode that is supported by an electrode fitting at the lower end of the lightning protection horn, and an air discharge gap that is provided between the discharge electrode and the discharge electrode. The gist of the apparatus is that the arc horn and the discharge electrode, which are directly attached to the cap fitting of the support insulator for the power transmission line, are integrally formed.

The gist of the second invention is that it is provided with a balance weight that counteracts the weight of the discharge electrode.

[0007]

[Action]

 According to the present invention, in order to attach the discharge electrode to the transmission line support insulator, the existing ring-shaped arc horn is removed, and instead the arc horn having the discharge electrode and the balance weight is formed. It can be attached to the cap fitting of.

Further, in the present invention, the bending load of the supporting insulator due to the weight of the discharge electrode or the like can be reduced by the balance weight.

[0009]

【Example】

 An embodiment embodying the present invention will be described below with reference to FIGS. As shown in FIG. 1, a transmission line support insulator 2 made of a long insulator is suspended from the tip of a support arm 1 of a steel tower by a bolt 3 via a mounting bracket 4 and a U-clevis 5. An arc horn 8 is supported on the support insulator 2 by a horn mounting bracket 7. An electrode mounting member 9 having an arc horn 19 and a discharge electrode 10 integrally formed is fixedly mounted on a cap member 26 below the supporting insulator 2. Further, the power transmission line 6 is supported on the lower end portion of the support insulator 2 via an electric wire clamp 11.

On the other hand, a lightning protection horn 13 is suspended from the tip of the support arm 1 via a mounting bracket 12 with an electrode fitting 14 on the ground side thereof. This lightning protection horn 13 has a pressure-resistant insulating cylinder (not shown) formed in a cylindrical shape from a fiber-reinforced resin material such as FRP, and has a non-voltage-current characteristic mainly composed of zinc oxide housed in series therein. It is composed of a linear current limiting element (not shown) and a rubber insulating jacket 16 having a large number of pleats for molding them. A horn-shaped ground-side discharge electrode 17 is supported on the lower end portion of the lightning protection horn 13, that is, on the charging side electrode fitting 15, and a predetermined distance is provided between the discharge electrode 17 and the discharge electrode 10. The air discharge gap G is provided.

As shown in FIGS. 2 and 3, the electrode mounting member 9 is composed of a pair of semicircular ring pieces 18, and has an arc horn 19 welded or integrally formed with the ring pieces 18. Two arc horns 19 are formed on each ring piece 18, and they are arranged every 90 degrees as a whole. The discharge electrode 10 is welded to the middle portion of one ring piece 18, and the balance weight 20 is welded to the middle portion of the other ring piece 18. The ring pieces 18 are fixed to each other by bolts 25 in a state of embracing the convex portion of the cap fitting 26 of the support insulator 2 and attached to the support insulator 2.

When a lightning surge is applied to the transmission line 6, this current is discharged from the wire clamp 11, the discharge electrode 10 on the charging side to the discharge electrode 17 on the ground side through the discharge gap G, and the lightning protection horn 13 To the support arm 1 from the grounded side electrode fitting 14 through the mounting bracket 12 and further to a steel tower (not shown) to be discharged to the ground.

When the lightning protection horn 13 of this embodiment is installed, the lightning protection horn 13 is attached to the tip of the support arm 1 via the bracket 12. On the other hand, for the discharge electrode 10 on the side of the power transmission line supporting insulator 2, first, the existing lower arc horn 21 is removed. Next, the electrode mounting member 9 in which the discharge electrode 10 and the arc horn 19 are integrally formed is attached to the place where the horn 21 was installed and screwed. In this case, a required air discharge gap G is formed between the discharge electrodes 10 and 17. Therefore, it is not necessary to lower the power transmission line 6 as described above, it is not necessary to stop the power transmission, and the discharge electrode 10 can be easily attached in a short time.

Further, due to the weight of the discharge electrode 10 and the wind pressure load applied to the discharge electrode 10 due to the attachment of the discharge electrode 10, a bending load is generated in the supporting insulator 2, which is reduced by the balance weight 20.

The present invention is not limited to the above-described embodiment, but is configured within a scope not departing from the spirit of the invention, such as using a heavy weight arc horn 19 or ring piece 18 instead of the balance weight 20. You can also do it.

[0016]

[Effect of the device]

 According to the present invention, when installing a lightning protection horn device, it is possible to easily attach the discharge electrode in a short time without the need to temporarily lower the transmission line.

Further, according to the present invention, the bending load acting on the support insulator due to the weight of the discharge electrode can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a lightning protection horn device embodying the present invention.

FIG. 2 is a plan view showing an electrode mounting bracket of the same lightning protection horn device.

FIG. 3 is a front view showing an electrode mounting bracket of the same lightning protection horn device.

FIG. 4 is a front view showing a mounting state of discharge electrodes of a conventional lightning protection horn device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 support arm, 2 support insulator for power transmission lines, 8 arc horn, 10 discharge electrode 13 lightning protection horn, 14 electrode metal fittings, 17 discharge electrode,
19 arc horn, 20 balance weight, 26
Cap metal fittings.

Claims (2)

[Scope of utility model registration request] 1. A support insulator for a power transmission line suspended from a support arm of a steel tower, an arc horn and a discharge electrode attached to the support insulator, a lightning protection horn suspended from the tip of the support arm, A lightning protection horn device comprising a discharge electrode supported by an electrode fitting at a lower end portion of a lightning protection horn and an air discharge gap provided between the discharge electrode and the discharge electrode, wherein the transmission line support insulator An electrode mounting bracket for a lightning protection horn device, characterized in that the arc horn and the discharge electrode are integrally formed to be directly mounted on the cap bracket. 2. The electrode mounting bracket for a lightning protection horn device according to claim 1, further comprising a balance weight that counteracts the weight of the discharge electrode.