JPH01186519A - Fitting structure of support metal for lightning protecting insulator in lightning-resistant horn insulator device - Google Patents

Abstract

PURPOSE:To easily fit a lightning protecting insulator without performing the special work on a power transmission line support insulator device by fastening and fixing a support metal on the tip of a support arm with bolts and supporting the lightning protecting insulator on the support metal. CONSTITUTION:A fitting metal 1a is fixed to the tip of the support arm 1 of a tower body with bolts 5. The metal 1a connects support insulators 3A and 3B, the insulators 3A and 3B have electric wire side connecting metals and suspend an electric wire 2, the electric wire side connecting metals support the charge side discharge electrodes. On the other hand, A support metal 28 is fastened and fixed to the tip of the support arm 1 with bolts 5, the support metal 28 supports a lightning protecting insulator 4. A ground side discharge electrode facing the charge side discharge electrode at an aerial discharge gap is provided at the tip of this lightning protecting insulator 4. The lightning protecting insulator 4 can be easily fitted to the support arm 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention quickly grounds the abnormally high voltage caused by lightning when it is applied to a power transmission line, and also prevents permanent grounding due to the follow-on arc that occurs afterwards. The present invention relates to a mounting structure for a support fitting for a lightning arrester in a lightning horn insulator device for an overhead transmission tll for preventing electrical connection and melting of the transmission tm, particularly for a tension tower.

[Prior art] Conventionally, in a lightning protection horn insulator device, a bolt insertion hole is made through the support arm of a steel tower, a dedicated mounting adapter is tightened and fixed with a bolt, and a lightning protection is attached to the tip of this mounting adapter. The insulator was suspended and fixed.

[Problems to be Solved by the Invention] However, with the above-mentioned conventional device, after drilling a hole in the support arm of the steel tower, a dedicated mounting bracket must be tightened and fixed with a bolt, so the drilling work on the steel tower is difficult. Not only is this extremely troublesome, but the strength of the support arm is reduced by the perforations, so there is a problem in that the support arm needs to be reinforced when a heavy lightning arrester is to be installed.

In view of the above circumstances, this invention has been developed to provide a mounting structure for a lightning arrester insulator support in a lightning horn insulator device that can be easily attached to an existing power transmission line support insulator device without special drilling or reinforcing work. The purpose is to provide.

[Means for Solving the Problems] In order to solve the above problems, the present invention fixes a mounting bracket to the tip of a support arm of a tower body with a bolt, connects a support insulator to the mounting bracket, and An electric wire is installed on the support hook via a wire-side connecting fitting, and the electric wire-side connecting fitting supports an electrode for discharging on the energized side, while the bolt is used at the tip of the supporting arm. A lightning arrester is supported by the supporting bracket, and a grounding side discharge electrode is provided at the tip of the lightning arrester, which faces the energized side discharge electrode with an air discharge gap. This configuration is adopted.

[Function] By employing the above means, the present invention functions as follows.

Since bolts are used to fix the mounting bracket of the power transmission line support weak element to the support arm, there is no need to perform drilling work on the support arm, and the installation work of the lightning arrester becomes easy.

Further, since no new bolt insertion holes are drilled in the support arm, the strength of the support arm does not decrease, and reinforcement work for the support arm is not required.

[Example] Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings.

The lightning horn insulator device of this embodiment, as shown in FIG. Zhang Insulator 3
One of the tension insulators 3A and 3B among A and 3B, and the lightning arrester 4 which is also horizontally cantilevered at the tip of the support arm 1.
The components are:

To explain each part, a tension insulator mounting bracket 1a fixed to the tip of the support arm 1 with a bolt 5,
A U clevis 6 is fixed with a bolt, and a U clevis 7 is rotatably and extendably connected to the clevis 6. Said U
A tower side horn mounting bracket 8 is connected to the clevis 7 by a shaft 9 so as to be relatively rotatable in the vertical direction, and an existing arc installed on the support side of the electric wire 2 is attached to the upper part of the bracket 8 via a mounting bracket 10a. A horn 10 is attached to one end of the metal fitting 8, and a tension insulator 3A is connected to one end of the metal fitting 8 via a pole clevis 12 connected to the shaft 11 so as to be relatively rotatable in the vertical direction.
, 3B are connected.

A wire-side horn fitting 14 serving as a wire-side connecting fitting is connected via a socket clevis 13 to the power-supplying side end portions of the tension insulators 3A and 3B so as to be relatively rotatable in the vertical direction by a shaft 15. . A horizontal revis link 17 is connected to one end of the wire-side horn mounting bracket 14 so as to be relatively rotatable in the vertical direction by a shaft 16, and a shaft 18 is connected to the link 17.
A connecting link 20 to which a wire clamp 19 that supports the wire 2 so as to be relatively rotatable in the vertical direction is connected thereto. Further, a jumper wire 21 is connected to the lower part of the electric wire flange 19.

As shown in FIG. 2.3, the base end of the arc horn 22 is fixed to the upper part of the wire-side horn mounting bracket 14 of the tension insulator 3A via the mounting bracket 22a with a bolt 23. is directed toward the support arm 1 side, and faces the arc horn 10 attached to the tower-side horn mounting bracket 8 across a predetermined air discharge gap G1.

Further, the base end side of an arc horn 24 serving as a discharge xi on the power supply side is provided at the lower part of the wire side horn mounting bracket 14 via a mounting bracket 24a in a direction perpendicular to the line, and is connected to a bolt 25.
．． 25, and its tip side extends obliquely upward. Further, a rod 26 is fixed to the opposite side of the power-supplying side horn mounting bracket 14 from the arc horn 24 via a mounting bracket 26a, and a weight 27 is attached to the tip of the rod 26. It balances the weight of the horn 24 and holds the arc horn 24 in a stable state.

Further, the lightning arrester 4 is attached to the tip of the support arm 1 by means of a bolt 29 via a support fitting 28 having a cross-section shaped like a letter L, which is fixed using the bolt 5 for the tension insulator mounting fitting la. It is cantilevered horizontally perpendicular to the line direction. An arc horn 31 is attached to the tip of the lightning arrester 4 via a support member 30. The support member 30 has a fourth
As shown in the figure, it is comprised of a pair of clamping pieces 30a, 30a for clamping and fixing the arc horn 31 so that it can slide in the directions of arrows S and T by tightening bolts 32. The support member 30 is connected to 1. A bolt 34 is attached to the tip of the support tube 33 having a flange portion 33a attached to the tip electrode 4a of the lightning arrester 4.
It is screwed and fixed in a removable manner.

The base end of the support tube 33 has a flange portion 33a connected to the electrode 4a.
is fitted into the recess 4b of the flange 33a.
The other end is fitted into a recess 35b of a holding member 35 having a hole 35a through which the tip of the support tube 33 is inserted, and is supported by the holding member 35 by tightening a bolt 36. The support tube 33 can be rotated by loosening the bolt 36, and the vertical inclination angle of the arc horn 31 can be adjusted.

As shown in FIG. 5.6, the arc horn 31 is provided with a rotary support tube 37 for bending in its middle portion.

The rotation support cylinder 37 has a pair of upper and lower disks 37a, 37a,
It is constituted by a support shaft 37b connecting the centers thereof, and a rotation Fj 37c fitted on the support shaft 37b so as to be relatively rotatable.

The rotary cylinder 37c has a long hole 37d formed in a semicircular arc shape.
is provided so that the bolt 38 can slide within the elongated hole 37d. Moreover, the side disks 37a, 37
The support portion 37e integrally provided on one side of a includes:
A proximal end 31a of the arc horn 31 is connected, and a distal end 31b of the arc horn 31 is connected to one side of the rotating tube 37c. Then, by loosening the bolt 38 and pushing the tip side 31b of the arc horn 31 in the directions of arrows P and Q, the bending angle of the intermediate portion of the arc horn 31 is adjusted. The arc horn 31 configured in this manner faces the arc horn 24 supported by the tension insulator 3A with a predetermined air discharge gap G2.

Here, in order to operate this device normally, the insulation strength of the air discharge gap G2 is configured to have a margin of at least a certain value with respect to the insulation strength of the lightning arrester 4.

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

By the way, when an abnormally high voltage caused by a lightning strike is applied to the electric wire 2, the current is discharged in the air discharge gap G2 between the arc horn 24 and the arc horn 31, and the current is discharged in the air discharge gap G2 between the arc horn 24 and the arc horn 31. It flows via a non-linear resistance element to the support arm 1 of the tower body.

Further, the follow-on arc that occurs thereafter is caused by the above-mentioned aerial discharge gap G2.
and are blocked by a nonlinear resistance element.

On the other hand, the insulation strength of the tension insulator 3A decreases due to abnormal contamination, and when an arc occurs along the creeping surface of the insulator 3A,
The arc is in the air discharge gap G1 between the arc horns 10.22
The arc is extinguished and burnout of the tension insulator 3A is prevented.

Now, in the embodiment of the present invention, the tension-resistant insulator is attached using the bolt 5 that supports the mounting bracket 1a on the support arm 1, and the support bracket 28 is tightened and fixed.
A new bolt insertion hole has been created for the support arm l.
The lightning arrester 4 can be easily attached to an existing power transmission line support insulator device without reinforcing it.

Note that the device of this embodiment is a support arm 1 of an existing tower body.
The device is constructed by attaching the support fitting 28, the lightning arrester 4, and the arc horn 24 as adapters to the existing tension insulator 3A installed at the tip of the insulator. The lightning arrester 4 is supported and fixed in advance to the tip of the support arm 1 of the tower body via the support fitting 28, or the arc horn 24 is attached in advance to the newly installed tension insulator 3A. It is also possible to configure the device using Therefore, this device has a wide range of applications and is very practical.

[Effects of the Invention] As described in detail above, the present invention has an excellent effect that it can be easily mounted on a power transmission line support insulator device without special drilling or reinforcing work.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment embodying the present invention;
Figure 2 is a cross-sectional view taken along line X-X in Figure 1, Figure 3 is a partially enlarged view of the wire support side of the tension insulator, Figure 4 is a partially enlarged plan view of the tip of the lightning arrester, and Figure 5 6 is a partially enlarged plan view of the bent portion of the arc horn as a discharge electrode supported by the lightning arrester, and FIG. 6 is a partially enlarged front view of the bent portion of the arc horn as the discharge electrode supported by the lightning arrester. 1...Support arm, 2...Electric wire, 3A (3B>・
... Tension insulator, 4... Lightning arrester, 14... Electric wire side horn mounting bracket, 19... tm clamp, 24... Arc horn, 28... Support metal fitting, 30... Support member , 31... Arc horn, 33... Support tube, 37...
...Rotation support tube, Gl. G2...Air discharge gap. Patent applicant: Nippon Insulators Co., Ltd. Agent: Ben Udo On 1) Hironobu Figure 2

Claims (1)

[Claims] 1. Attach the mounting bracket (1) to the tip of the support arm (1) of the tower body.
a) is fixed with bolts (5), and support insulators (3A, 3B) are connected to the mounting bracket (1a), and electric wires are connected to the support insulators (3A, 3B) via the wire-side connecting bracket. (2) is constructed, and the electric wire side connecting fitting supports the discharge electrode on the charging side, while the support arm (1
) at the tip of the support fitting (
28) is tightened and fixed, a lightning arrester (4) is supported on the support metal fitting, and a grounding side is provided at the tip of the lightning arrester (4) opposite to the discharge electrode on the energized side with an air discharge gap. A mounting structure for a lightning arrester insulator support in a lightning horn insulator device, characterized in that it is provided with a discharge electrode.