JPH0243050Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a power transmission line support device equipped with a lightning arrester.

[Conventional technology]

Overhead power transmission lines are attached to a support structure via a power line support device, and in response to lightning surge voltage that occurs during lightning strikes, air flashovers are installed between the arc horns installed before and after the insulator link of the power line support device. I have to. The arc current generated by this air flashing is interrupted by a shield breaker at the electric station, and then the power is retransmitted by turning the shield breaker back on. However, various problems have arisen due to instantaneous power outages caused by this disconnection. For example, in an automatic production system using a computer, this instantaneous power outage causes the computer to stop, disrupting production.

Therefore, as a means to solve these problems, it has been proposed to install a zinc oxide type lightning arrester in parallel with a power transmission line support device. This one is for example the second
As shown in the figure, an insulator link 55 is attached to the tower arm 51 via a suspension device mounting bracket 52, a U clevis 53, and a horn mounting bracket 54, and a parallel clevis 56 and a horn mounting bracket 57 are attached to the lower end of the insulator link 55. A suspension clamp 59 that clamps the conductor 58 is attached, and a zinc oxide lightning arrester 62 with an air gap 61 is attached to the arc horn 60 of the horn mounting bracket 57 via a mounting bracket 64 that grips its flat body 63. and is attached to the horn mounting bracket 54. Therefore, the length of the air gap 61 is set shorter than the gap length between the arc horns 60 and 65 before and after the insulator chain. Therefore, when a high overvoltage is applied between the conductor 58 and the tower arm 51 due to a lightning strike, the air gap 61 is discharged. When the air gap 61 discharges, the lightning arrester 62
The zinc oxide element inside is connected to the conductor 58, and due to the excellent non-linear resistance characteristics of the zinc oxide element, the voltage is limited and the following current is kept extremely small. Therefore, the following flow is easily cut off by the air gap 61 and returns to its original state, thereby eliminating instantaneous power outages.

[The problem that the invention attempts to solve]

However, in the conventional device, an arc horn 65 is attached to one end of a horn mounting bracket 54 that is supported at one point on a steel tower arm 51, and a zinc oxide lightning arrester 62 is provided at the other end, and the axis of the insulator chain 55 that supports the conductor 58 is connected to the horn. It lies on a vertical line 67 passing through a support shaft 66 for attaching the mounting bracket 54 to the tower arm 51. Therefore, in order for the horn mounting bracket 54 to be balanced, the length from the center of gravity of the arc horn 65 to the vertical line 67 must be the same as the length from the axis of the zinc oxide type lightning arrester 62 to the vertical line 67. It is necessary to make the length multiplied by the value obtained by dividing the weight of the lightning arrester 62 by the weight. For this reason, the arc horn 65, which is much lighter than the lightning arrester 62, protrudes far more than the lightning arrester 62, contrary to the figure, resulting in a drawback that the device becomes extremely large.

Therefore, in order to reduce the amount of lateral protrusion of the arc horn 65, if the insulator chain 55 is provided closer to the arc horn 65 from the vertical line 67, for example, by increasing or decreasing the insulator, the insulator chain 55 can be hung from the hanging point of the horn mounting bracket 54. If you change the load, use the horn mounting bracket 5.
Air gap 61 due to loss of balance of 4
changes significantly, and the lightning arrester 62 no longer functions effectively against lightning strikes.

The present invention has been made in view of the above points, and an object of the present invention is to provide a power transmission line support device with a lightning arrester that can achieve yoke balance by simple means in response to changes in the load applied to the yoke.

[Means for solving problems]

The configuration of the present invention for achieving this purpose will be explained using the drawings.

A zinc oxide type lightning arrester 10 is attached to one end of the yoke 5 which is attached to the support structure 1 with single point support, and is attached to the power transmission line support device 7, and the other end is attached to the conductor side horn electrode 18 of the power transmission line support device 7 to ensure an air gap 20. is fixed, and a plurality of insertion holes 21 for supporting shafts 6 for attaching the yoke 5 to the support structure 1 with one-point support are provided in the middle of the yoke 5 in a direction intersecting the axis of the power transmission line support device.

[Effect]

In the present invention, when the load applied to the attachment point of the power transmission line support device 7 of the yoke 5 or the load of the zinc oxide lightning arrester 10 changes, yoke balance can be obtained from the plurality of spindle insertion holes 21 provided in the yoke 5. Select the insertion hole 21 and use the spindle inserted through this insertion hole to attach the yoke 5.
is attached to the support structure 1. Therefore, the yoke can be balanced against changes in load using simple means. Further, if the lengths of the power transmission line support device 7 and the zinc oxide lightning arrester 10 do not change at that time, there is no need to adjust the length of the air gap.

〔Example〕

Embodiments of the present invention will be described based on the drawings. 1st
In the figure, 1 is the steel tower arm, 2 is the steel tower arm 1
The suspension device mounting bracket is attached to the lower surface of the clevis bracket 4, and the clevis bracket 4 is attached to the support shaft 3 so that it can move back and forth.
A yoke 5 is rotatably attached to this clevis fitting 4 with a support shaft 6.

A right-angled clevis 8 located at the upper end of the suspension device 7 is rotatably attached to one end of the yoke 5 by a support shaft 9, and a zinc oxide lightning arrester 10 is attached to the other end in the same downward direction as the suspension device 7. The suspension device 7 includes an insulator chain 11 attached to a right-angled clevis 8 via a link 12, and a horn mounting bracket 16 interposed between a suspension clamp 15 that clamps a conductor 14 and the insulator chain 11.
The arc horn 13 attached to the yoke 5, the arc horn 17 facing the arc horn 17, and the arc horn 17
Horn electrodes 18 with a 90° phase difference are attached.
This horn electrode 18 secures an air gap 20 with a horn electrode 19 protruding from the free end of the zinc oxide lightning arrester 10.

A plurality of insertion holes 21 for the support shaft 6 provided in the yoke 5 are bored in a direction perpendicular to the axis of the suspension device 7. When installing the yoke 5 to which the zinc oxide lightning arrester 10 and the suspension device 11 are attached to the tower arm 1, select an insertion hole that provides yoke balance from among these insertion holes, and attach the yoke 5 with the support shaft 6 inserted through it. is attached to tower arm 1.

The present invention can be applied not only to power transmission line support devices but also to power transmission line tension devices.

[Effect of idea]

As is clear from the above explanation, according to the present invention, a support shaft insertion hole is provided in a yoke in which a power transmission line support device and a zinc oxide lightning arrester are installed side by side to support the power transmission line in order to attach the yoke to the tower arm with single point support. Since a plurality of them are provided in the direction intersecting the axis of the support device, the yoke can be balanced by simple means even if the load applied to the attachment point of the power transmission line support device on the yoke or the load of the zinc oxide lightning arrester is changed.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a front view of a conventional device. DESCRIPTION OF SYMBOLS 1... Support structure (steel tower arm), 5... Yoke, 6... Support shaft, 7... Power line support device (suspension device), 10... Zinc oxide type lightning arrester, 18... Horn electrode, 20... ...Air gap, 21...Insertion hole.

Claims (1)

[Scope of utility model registration request] A power transmission line support device is attached to one end of the yoke, which is attached to a support structure with single point support, and a zinc oxide lightning arrester is fixed to the other end of the yoke to ensure an air gap with the conductor side horn electrode of the power transmission line support device. A power transmission line support device equipped with a lightning arrester, characterized in that a plurality of insertion holes for a support shaft for attaching the yoke to a support structure with single point support are provided in the middle in a direction intersecting the axis of the power transmission line support device.