JPH04242024A - Lighting-proof horn insulator device - Google Patents

Abstract

PURPOSE:To provide installation of a lightning insulator without removing an existing supporting insulator from a support arm by fitting a base end part of a fitting bracket onto a suspending member of the support arm of a steel tower to support the lightning insulator with the tip end part. CONSTITUTION:In a fitting bracket 11 of a lightning-proof horn insulator, a base end part thereof is fitted onto a suspending member 6 of a support arm 1 of a steel tower and a lightning insulator 17 is suspended and supported at a tip end lower surface of the bracket 11. Accordingly, in the case of fitting the insulator 17 to the support arm 1 of an existing steel tower, it is not necessary to detach an existing supporting insulator 7 from the arm 1 to interpose the bracket 11 and it is sufficient to fit the bracket 11 to the suspending member 6 of the arm 1 with a bolt 14 and a nut 15 to support the insulator 17 at the tip end part thereof, thereby executing fitting work easily in a short time.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention is a lightning horn that quickly discharges the abnormally large current caused by lightning to the ground when it flows through a power transmission line, and quickly suppresses and interrupts the subsequent current. This relates to an insulator device.

0002

2. Description of the Related Art Conventional lightning-protecting horn insulators of this type are known, for example, as shown in FIGS. In this conventional configuration, the support arm 1 of the tower
A retaining plate 29, a mounting bracket 11, and a support insulator 7 are attached to the lower surface of the tip of the horizontal member 2 by a plurality of bolts 8, and a power transmission line or jumper wire 9 is supported at the end of the support insulator 7. A lightning arrester 17 is supported on the lower surface of the distal end of the mounting bracket 11. A discharge electrode 25 on the charging side is provided at the end of the support insulator 7, and a discharge electrode 27 on the grounding side is provided at the end of the lightning arrester 17 at a predetermined distance with respect to the discharge electrode 25 on the charging side. They are provided so as to face each other with an air discharge gap G between them.

0003

However, in this conventional lightning protection horn insulator device, the mounting bracket 11 supporting the lightning protection insulator 17 is attached to the support arm of the steel tower together with the support insulator 7 supporting the power transmission line or jumper wire 9. It is attached to the bottom surface of the tip of the horizontal member 2 of 1. In this conventional device, when attaching the lightning arrester 17 to the support arm 1 of an existing steel tower, the support insulator 7 is once removed from the bottom surface of the tip of the horizontal member 2 of the support arm 1, and the mounting bracket 11 for the lightning arrester 17 is removed. It is necessary to attach it together with the support insulator 7 to the bottom surface of the tip of the horizontal member 2 of the support arm 1, which is a very troublesome and time-consuming process. There was a problem with reliability that needed improvement.

[0004] The present invention has been made by focusing on the problems existing in the conventional technology, and its purpose is to solve the following problems when attaching a lightning arrester to the support arm of an existing steel tower: To provide a lightning horn insulator device in which a mounting bracket for a lightning arrester can be easily attached without removing the support insulator from a support arm.

[0005]

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a power transmission line or a jumper wire is supported on a support arm of a steel tower via a support insulator, and a mounting bracket is provided on the support arm. Support lightning insulator through
A discharge electrode on the energized side is connected and supported to the power transmission line or jumper wire, and a discharge electrode on the grounding side is connected to the end of the lightning arrester, and a predetermined air discharge gap is provided between the discharge electrode on the energized side and the discharge electrode on the energized side. In the lightning protection horn insulator device, the base end of the mounting bracket is mounted on the hanging material of the support arm of the steel tower, and the lightning arrester is supported at the tip of the mounting bracket.

[0006]

[Operation] In the lightning protection horn insulator device configured as described above, the base end of the mounting bracket is attached to the hanging material of the support arm of the steel tower, and the lightning arrester is supported at the tip of the mounting bracket. Therefore, when installing the lightning arrester on the support arm of an existing steel tower, the mounting bracket can be easily installed on the support arm. Furthermore, the mounting bracket for the lightning arrester can be mounted on the suspension member of the support arm without removing the support insulator from the support arm, and the mounting work can be easily carried out in a short time.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lightning-resistant horn insulator device embodying the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 1 to 4, a support arm 1 of a steel tower is fixed to a horizontal member 2 made of a pair of L-shaped steel extending horizontally, and a plurality of bolts 3 to the tip of the horizontal member 2. The connecting fitting 4 is made up of a pair of L-shaped steel hanging members 6 fixed to the connecting fitting 4 with a plurality of bolts 5. The pair of hanging members 6 of the support arm 1 extend diagonally upward while gradually separating from the attachment portion to the connecting fitting 4.

A support insulator 7 made of a long-stem insulator is suspended and fixed to the bottom surface of the tip of the horizontal member 2 of the support insulator 1 by a plurality of bolts 8. The jumper wire 9 is supported at the lower end of the support insulator 7 via a wire clamp 10.
Both ends of the support arm 1 are connected to power transmission lines (not shown) supported by the horizontal member 2 of the support arm 1 via a tension insulator device.

The mounting bracket 11 is bent to have a substantially obtuse angle when viewed from the front, and a reinforcing rib 12 having a water shielding plate 12a is provided on the upper surface of the intermediate portion thereof. The base end of this mounting bracket 11 is connected to the hanging member 6 of the support arm 1.
A mounting plate 13 disposed across the upper surface and between the lower surfaces of the hanging member 6, and a mounting bracket 1 from the mounting plate 13.
It is fixed on the hanging member 6 by a pair of bottles 14 inserted into the base end portion of the bottle 1 and a pair of nuts 15 screwed into the bolts 14. A pair of movement prevention pieces 16 are provided protruding from the lower surface of the base end of the mounting bracket 11.
6 engages with the inner surface of the hanging material 6 of the support arm 1, thereby preventing the mounting bracket 11 from moving downward along the slanted upper surface of the hanging material 6.

The lightning arrester 17 is suspended and fixed to the lower surface of the tip of the mounting bracket 11 by a plurality of bolts 18. This lightning arrester 17 has a voltage-current characteristic mainly composed of a voltage-resistant insulating cylinder (not shown) formed in a cylindrical shape from a tensile material such as FRP, and zinc oxide (ZnO) housed in series inside the cylinder. is a non-linear current limiting element 19, cap-shaped electrode fittings 20, 21 on the grounding side and the charging side which are fitted and fixed to both ends of the voltage-resistant insulating cylinder, and provided on the outer periphery of the voltage-resistant insulating cylinder. It is composed of molded rubber 22. Annular arc horns 23 and 24 are provided facing both electrode fittings 20 and 21 of the lightning arrester 17, and the arc horns 2
3 and 24 reduce damage to the mold rubber 22 during creeping flash.

A horn-shaped discharge electrode 25 on the power supply side is attached to the wire clamp 10 of the support insulator 7 via a mounting body 26. A horn-shaped ground-side discharge electrode 27 is attached to a power-supply-side electrode fitting 21 at the tip of the lightning arrester 17 via a mounting plate 28 . The discharge portions of the discharge electrodes 25 and 27 on the energizing side and the grounding side are arranged to face each other with a predetermined aerial discharge gap G between them.

Next, the operation of the lightning horn insulator device constructed as described above will be explained. Now, in this lightning protection horn insulator device, when a surge current caused by a lightning strike is applied to the power transmission line, the current is discharged in the air discharge gap G between both discharge electrodes 25 and 27, and is built in the lightning protection insulator 17. The current flows through the current limiting element 19 and the mounting bracket 11 to the support arm 1 of the tower, and is discharged from the tower to the ground. or,
Subsequent currents generated thereafter are suppressed and blocked by the air discharge gap G between the discharge electrodes 25 and 27 and the current limiting element 19 in the lightning arrester 17.

As described above, in the lightning protection horn insulator device of this embodiment, the base end of the mounting bracket 11 is mounted on the hanging member 6 of the support arm 1 of the steel tower, and the lightning arrester is attached to the lower surface of the tip of the mounting bracket 11. 17 is suspended and supported, unlike the conventional device in which the mounting bracket 11 and the support insulator 7 are attached to the bottom surface of the tip of the horizontal member 2 of the support arm 1 shown in FIGS. 5 and 6, When attaching the lightning arrester 17 to the support arm 1, there is no need to remove the support insulator 7 from the support arm 1, and the mounting bracket 11 is attached to the suspension member 6 of the support arm 1.
The lightning arrester 17 can be supported on the mounting bracket 11, and the installation work can be easily carried out in a short time.

Furthermore, in the lightning horn insulator device of this embodiment, the base end of the mounting bracket 11 for supporting the lightning arrester 17 is attached to the slanted upper surface of the hanging member 6 of the support arm 1. Rainwater that concentrates on the tip of the horizontal member 2 of 1 does not flow to the outer periphery of the lightning arrester 17 through the mounting bracket 11, and by additionally installing the water shielding plate 12a, the lightning arrester 17
It is possible to more reliably prevent the possibility that the dielectric strength of the material will decrease.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and the gist of the present invention may be modified, for example, by appropriately changing the shape of the mounting bracket 11 or the mounting structure of the support arm 1 to the hanging material 6. It is also possible to arbitrarily change and embody the configuration of each part without departing from the above.

[0016]

[Effects of the Invention] Since the present invention is constructed as described above, when installing a lightning arrester to the support arm of an existing steel tower, the mounting bracket for the lightning arrester can be installed without removing the support insulator from the support arm. This has the excellent effect of allowing the user to install the device in a short time and easily perform the installation work.

[Brief explanation of the drawing]

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

FIG. 2 is a front view showing almost the entire lightning protection horn insulator device.

FIG. 3 is a partial side view showing the mounting structure of the lightning arrester.

FIG. 4 is an enlarged sectional view taken along line AA in FIG. 3;

FIG. 5 is a front view showing a conventional lightning horn insulator device.

FIG. 6 is a partial side view showing the mounting configuration of the lightning arrester.

FIG. 7 is a partial front view showing the mounting structure of the lightning arrester.

[Explanation of symbols]

Claims (1)

[Claims] [Claim 1] A support insulator (
7) to support power transmission lines or jumper wires (9), and the support arm (1) is equipped with a mounting bracket (11).
), and a discharge electrode (25) on the energized side is connected and supported to the power transmission line or jumper wire (9), and the end of the lightning arrester (17) is connected to a ground. In the lightning horn insulator device, the side discharge electrode (27) is provided so as to face the energized side discharge electrode (25) with a predetermined aerial discharge gap (G), and the mounting bracket (11) ) on the hanging material (6) of the support arm (1) of the steel tower, and its mounting bracket (11).
A lightning protection horn insulator device, characterized in that a lightning protection insulator (17) is supported at the tip of the horn.