JPS62168305A - Thunder resistant horn insulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a lightning protection horn insulator device in which a lightning arrester insulator is skillfully incorporated into a V-hanging long trunk support insulator device.

(Prior art) Conventionally, lightning arrester insulators have not been installed around V-hanging type supporting insulators for installing power transmission lines on tower bodies, and the V-hanging type supporting insulators simply support power transmission lines. It had only one function.

(Problems to be Solved by the Invention) However, the above-mentioned conventional hanging type support insulator device is often used in areas where snow disasters occur, and in these cases, when abnormal voltage is applied to the power transmission line due to a lightning strike, A flash short occurs between a pair of arcing horns attached to both ends of the suspension insulator between the electric wire and the tower body, and upon sensing this, the circuit breaker at the substation is activated.
There was a problem with temporary power outages.

The present invention solves the above-mentioned problems, provides a stable column installation state, can be easily applied to the existing V-hanging type long trunk support insulator device, and can maintain a constant air discharge gap.
Our objective is to provide a lightning-resistant horn insulator device with excellent reliability.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention makes a pair of long support insulators rotatable in the track direction with respect to the support arms via hanging fittings, and The lower end cap fittings of both long trunk support insulators are connected and fixed in a manner that they cannot rotate relative to each other by a connecting yoke, and the connecting yoke supports a power transmission line via a wire clamp, and the supporting arm is The M lightning insulator is suspended and fixed via an adapter, and the discharge electrode on the energizing side extending from the connection yoke and the discharge electrode attached to the lower electrode of the lightning arrester are opposed to each other with a predetermined air discharge gap. We are taking steps to do so.

(Function) By adopting the above-mentioned means, the present invention functions as follows.

Even if the V-hanging type long trunk support insulator device is subjected to a force that attempts to swing in a direction perpendicular to the track direction due to wind pressure, snow accumulation, etc., the lower end cap fitting of the long trunk support insulator is fixed by the connecting yoke. , rotation in the same direction is prevented. Furthermore, even if the long support insulator swings in the line direction, this swing is not so large, and therefore the air discharge gap between the discharge electrode on the energized side and the discharge electrode on the lightning arrester side remains constant. is maintained, and the discharge characteristics are stabilized.

In addition, it can be easily applied to an existing hanging type long trunk support insulator device without changing the specifications of the tower body.

(Example) Hereinafter, an example embodying the present invention is shown in FIGS. 1 and 2.
This will be explained based on the diagram.

A support arm 2 consisting of a horizontal support frame 2A and an inclined frame 2B is horizontally installed on the tower body 1, and on the horizontal support frame 2A is a hanging type long trunk support insulator device for installing a power transmission line. is installed. Since this long-stem support insulator device is configured symmetrically as shown in Figure 1, only one side (the left side in Figure 1) will be explained, and the other side will be given the same reference numerals and explanations will be omitted. do.

A hanging metal fitting 3 is fixed to the tip of the horizontal support frame 2A with a bolt, and a connecting metal fitting 5 is connected to the hanging metal fitting 3 by means of a pin 4 in the direction of the railway line (direction perpendicular to the paper plane of FIG. 1). A cap fitting 8 is connected to the metal fitting 5 so as to be movable, and is fixed to the upper end of the long trunk support insulator 7 by a pin 6. In addition, an inverted triangular plate-shaped connection yoke 10 is fixed with bolts 11 between the cap fittings 9.9 fixed to the lower ends of both the long stem support insulators 7, 7 so as not to rotate relative to each other, thereby forming a V-hanging long stem support insulator device. is prevented from rotating in the direction perpendicular to the railroad tracks (horizontal direction in Figure 1). Incidentally, arcing horns 12 and 13 on the grounding side and on the energizing side are attached to both the upper and lower cap fittings 8.9 to prevent creeping flash of the long support insulator 7.

A right angle clevis link 15 is connected to the connection yoke 10 by a pin 14 so as to be rotatable in the direction perpendicular to the track, and a connection link 17 is connected to the clevis link 15 by a pin 16 so as to be rotatable in the track direction. A wire clamp 20 for gripping the power transmission line 19 by means of a bin 18 is connected to the link 17 so as to be rotatable in the line direction. An arcing horn 22 serving as a discharge electrode on the energizing side is horizontally cantilevered by bolts 21 on the connection yoke 10 .

An adapter 23 is cantilevered forward and downward by a bolt at the tip of the support arm 2. Same adapter 1
An upper electrode 25 of a lightning arrester 24 having a built-in lightning arrester element with non-linear voltage-current characteristics is fixed to the lower surface of the tip of the bolt 23 with a bolt.

Arcing rings 27 and 28 on the ground side and on the energized side are attached to the upper electrode 25 and lower electrode 26 of the lightning arrester 24 to prevent creeping flash, and the mounting plate is fixed to the lower electrode 26. An arcing horn 30 serving as a discharge electrode is supported in a cantilevered manner on 29 so that its position can be adjusted in the line direction and in the orthogonal direction.

This arcing horn 30 is the arcing horn 2
2 with a predetermined air discharge gap G1 therebetween. Further, as shown in FIG. 2, an arcuate discharge end 30a is attached to the tip of the arcing horn 30.
When the long trunk supporting insulator 7 rotates about the bin 4 in the direction of the line (in the left-right direction in FIG. 2), the discharge gap G1 is made to be approximately constant. The discharge gap G1 is made smaller than the aerial discharge gap G2 between the arcing rings 12 and 13, so that discharge always occurs on the discharge gap 01 side.

An insulated terminal 25a is provided at the upper end of the upper electrode 25 to be electrically connected to a lightning arrester built into the lightning arrester 24 and to draw out the current flowing therethrough. This insulated terminal 2
5a has a function of guiding current to a counter or the like for monitoring its operating status, for example. Therefore, unless there is a special purpose for using it, it should be grounded by the shorting piece 23a.

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

Now, if an abnormally high voltage is applied to the power transmission line 19 due to a lightning strike, the current will flow through the wire clamp 20 and the connecting link 17.
, the right-angle clevis link 15 and the connecting yoke 10, it is discharged from the arcing horn 22 to the arcing horn 30, further flows through the lightning arrester in the lightning arrester 24, and is grounded via the adapter 23, the support arm 2, and the tower body 1. Ru. In addition, subsequent currents that occur thereafter are blocked by the lightning protection element, thereby preventing the occurrence of a ground fault.

On the other hand, when the power transmission line 19 swings in the direction of the track (left and right in the figure) as shown in FIG. 2 due to wind pressure or the like, both long trunk support insulators 7.
7 swing in the same direction around the bottle 4. At this time, since the discharge end 30a of the arcing horn 30 on the lightning arrester 24 side is formed in an arc shape, both arcing horns 22
．． The discharge gap G1 of 30 mm is always kept constant, and the discharge characteristics can be stabilized.

Furthermore, even if the long trunk support insulators 7, 7 try to swing in the direction perpendicular to the track in FIG. On the other hand, since it is fixed by the bolt 11, this rocking is prevented, the discharge gap G1 does not change, and the discharge characteristics are stabilized. In addition, in a hanging type suspension insulator device in which a pair of hanging insulators formed by connecting a large number of hanging insulators in series are mounted in a V-shape so as to be rotatable in the direction perpendicular to the track, the rotation in the direction perpendicular to the track is Although the angle is approximately ±30 degrees at the maximum in strong winds, the long stem support insulator device of the present invention has no rotation in the same direction, and the discharge characteristics are stabilized.

Furthermore, by attaching the lightning arrester 24 to the existing V-hanging type long trunk support insulator device via the adapter 23 and supporting the arcing horn 22 on the connecting yoke 10,
It can be easily installed without changing the specifications of the tower body. In the case of an insulator device for 60,000 to 70,000 kilovolts, the weight of the lightning arrester 24 is 20 to 30 kg, so there is no problem in applying it to the existing tower body, and the strength of the tower increases even in higher voltage classes. Therefore, there is no problem with installation.

In addition, in this embodiment, since the lightning arrester 24 is fixed in a hanging manner, no constant bending load is applied to the insulator 24.
The device can be stabilized.

Moreover, the present invention can also be embodied as follows.

(1) As shown in FIG. 3, the connecting yoke 10 is supported by a bracket 31 so as to surround the lower ends of both the long support insulators 7, 7, and the creeping flash of the long support insulators 7, 7 is supported. Existing arcing horn 3 with a function to prevent circuits
2 can also be used as a discharge electrode on the power supply side. This separate structure can be easily applied to an existing hanging type long trunk support insulator device by simply attaching the lightning arrester 24 using the adapter 23.

(2) As shown in FIGS. 4 and 5, the support arm 2
Approximately the center of the horizontal support frame 2A, that is, both long trunk support insulators 7
．． A lightning arrester 24 is suspended and fixed to a position corresponding to the central part of the yoke 7 via an adapter 33 raised upward, while an arcing horn 34 as a discharge electrode on the energized side is connected to the connection yoke 10. Cantilever support in the direction of the track.

In this case, rainwater and snow on the support arm 2 will be absorbed by the adapter 33.
Since it does not move to the lightning arrester 24 through the lightning arrester 24, creepage staining and reduction in insulation strength are suppressed.

When the lightning arrester 24 is supported in the middle part of the horizontal support frame 2A, it is desirable to position it outside the center part so that a worker does not receive an electric shock due to electrostatic induction or contact during maintenance work.

(3) The lightning arrester 24 is hung and fixed diagonally.

Effects of the Invention As detailed above, the present invention is capable of quickly discharging even if an abnormally high voltage is applied to a power transmission line due to a lightning strike, and also reliably interrupts subsequent current, thereby preventing ground faults. It is possible to prevent the electric discharge, a stable column mounting condition can be obtained, it can be easily applied to an existing insulator device, the air discharge gap can be maintained constant, and reliability can be improved.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment embodying the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a front view showing another example of the present invention, and FIG. FIG. 5 is a front view showing another example, and FIG. 5 is a left side view of FIG. 4. DESCRIPTION OF SYMBOLS 1... Tower body, 2... Support arm, 7... Long trunk support insulator constituting a V-suspended long trunk support insulator device, lO... Connection yoke, 19... Power transmission line, 20. ...Electric wire clamp, 22...Arching horn as a discharge electrode on the energizing side, 23.33...Adapter, 24...Lightning arrester,
30°32.34... Arcing horn as a discharge electrode, G1... Air discharge gap.

Claims (1)

[Scope of Claims] 1. A pair of long trunk support insulators are attached to the support arm via hanging metal fittings so as to be rotatable in the track direction and in a V-shape, and lower end cap metal fittings of both long trunk support insulators are attached. are connected and fixed in a relatively unrotatable manner by a connecting yoke, a power transmission line is supported on the connecting yoke via a wire clamp, a lightning arrester is suspended and fixed to the support arm via an adapter, and the connecting yoke A lightning horn insulator device, characterized in that a discharge electrode on the energized side extending from the lightning arrester and a discharge electrode attached to the lower electrode of the lightning protection insulator face each other with a predetermined aerial discharge gap. 2. The lightning horn insulator device according to claim 1, wherein the mounting position of the lightning arrester with respect to the support arm is located outward from the position corresponding to the central portion of the pair of long support insulators.