JPH01258319A - Lightning resisting horn insulator - Google Patents

Abstract

PURPOSE:To stably support a lightning insulator and prevent the lightning insulator or suspension insulators from being destroyed even if a transmission line is disconnected by setting a rotational axis line of a suspended fitting and a center axis line of the lightning insulator as they are located on the same vertical face and restrict the motion of the lightning insulator in one direction. CONSTITUTION:A suspended fitting 4 is supported as rotatable only in a line orthogonal direction against a suspended fitting 2. A lightning insulator 16 is attached tc the suspended fitting 4 through an attaching adapter 14. A rotational axis line 02 of the suspended fitting 4 and a center axis line 01 of the lightning insulator 16 are set as they are located on the same vertical face. The lightning insulator 16 is thus not swung even if suspension insulators 10 are swung in a line direction. Furthermore, even if a transmission line is disconnected so that the suspension insulators 10 jump upward as a connection pin 5B located in upper portion is the center, a stopper 14b of the attaching adapter 14 is pushed to rotate the attaching adapter 14 in the same direction so as to rotate the lightning insulator 16 in upper direction. Thus, collision of the lightning insulator 16 and the suspension insulators 10 is prevented.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a lightning horn insulator device, and more specifically, it is capable of stably supporting a lightning arrester, the entire device is lightweight and compact, and the lightning arrester is This invention relates to a lightning-resistant horn insulator device that can stabilize the installation condition of poles.

(Prior Art) In general, a lightning horn insulator device for power transmission lines has been proposed that quickly discharges the surge current when a lightning surge voltage is applied to a power transmission line, and blocks subsequent follow-up current to prevent ground faults. has been done. Conventionally, as shown in FIG. 9, this device has a connecting fitting 31 fixed to one support arm 1 of the steel tower with bolts, and an upper horn mounting fitting 33 is supported on the connecting fitting 31 via a U clevis link 32. A suspension insulator chain 10 formed by connecting a large number of suspension insulators 9 in series is suspended from the mounting bracket 33, and power is transmitted to the lower end of the suspension insulator chain 10 via a lower horn mounting bracket 11 and a wire clamp 12. &i13 is supported.

On the other hand, a mounting adapter 3 is attached to the upper horn mounting bracket 33.
4 is fixed with a bolt, and the mounting adapter 34 has a
A lightning arrester 16 incorporating a current limiting element mainly made of zinc oxide with non-linear voltage-current characteristics is supported, and is attached to the lower horn mounting bracket 11. A predetermined air discharge gap G is provided between the insulator 16 and the ground side arc horn 19 attached to the insulator 16.

Further, the horn mounting bracket 33 is designed to cancel the moment of the lightning arrester 16 by changing the vertical position of the connection point between the connecting bracket 31 and the suspension insulator chain 10, and also to cancel the moment of the suspension insulator chain 10. Arc horn 3 to prevent tangling
5 is installed.

(Problem to be Solved by the Invention) However, in the conventional mounting structure of the lightning arrester 16, if the suspension insulator chain 10 swings due to the swinging of the power transmission line 13 or if water lands on the power transmission line, the suspension insulator chain 10 will be damaged. The hanging load of changes,
For this reason, there was a problem in that the lightning arrester 16 changed its position, making it difficult to stably maintain the pole mounting state, and that there was a limit to its applicability.

Furthermore, in the event that the power transmission line 13 is disconnected and the suspension insulator chain 10 rotates in the counterclockwise direction in FIG. This would only destroy the lightning arrester 16, and there was a fear that the suspension insulator 10 itself would be damaged, causing it to fall.

Furthermore, although not shown, there was also a mounting structure in which the lightning arrester was attached to the support arm via a mounting adapter, but this required a dedicated mounting adapter to be prepared and bolt insertion holes for mounting to be formed in the support arm. This required troublesome work, such as creating

The purpose of this invention is to be able to stably support lightning arrester insulators, to be widely applicable regardless of usage conditions, to be easy to install, and to provide lightning protection even if a power transmission line is severed. To provide a lightning-resistant horn insulator device capable of preventing destruction of an insulator or a suspension insulator chain and improving safety.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the lightning horn insulator device of the present invention supports a hanging bracket rotatably in only one direction with respect to a support arm of a steel tower via a mounting bracket. A connecting link is supported on the hanging metal fitting so as to be rotatable in a direction perpendicular to the rotating direction of the hanging metal fitting, and a power transmission line is suspended from the connecting link via a support insulator, Similarly, a mounting adapter is connected to the hanging metal fitting so that it can be held at a predetermined position protruding to the side by a stopper provided on the hanging metal fitting, and can be rotated upward by the rotational movement of the connecting link. , a lightning arrester equipped with a current limiting element with non-linear voltage-current characteristics is attached to the mounting adapter, and the rotation axis of the hanging fitting and the center axis of the lightning arrester are located on substantially the same vertical plane. A 7-couhorn of the charging example configured as follows and provided on the power transmission line side,
A method is adopted in which the lightning arrester is opposed to the ground side arc horn provided at the tip of the lightning arrester with a predetermined air discharge gap therebetween.

(Function) In the lightning protection horn insulator device of the present invention, when the lightning arrester is in a stationary state, the rotating wheel line of the suspension fitting and the center axis of the lightning arrester are located in the same vertical plane, so that the pole mounting state is stabilized. .

Furthermore, even if the power transmission line swings due to wind pressure, etc. and the supporting insulator swings in any direction, the hanging bracket and the lightning arrester are rotated in one direction, so a large inertial force acts on the lightning arrester. By suppressing this, the strength of the mounting fittings and hanging fittings is reduced, and by appropriately selecting the shapes of the arc horns on the power supply side and the grounding side, the discharge gap length can be maintained constant, and the power transmission line can be Even if the support insulator were to be separated and the support insulator was suddenly thrown upwards around the suspension point at the top, the mounting adapter would be rotated in the same direction by the connection link and the lightning arrester would be rotated upwards. This prevents the support insulator from colliding with the lightning rod, and prevents harm to humans and animals due to damage or falling of the lightning protection insulator.

(Example) Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 5.

As shown in FIGS. 1 to 3, a mounting bracket 2 is fixed to the tip of the support arm l attached to the steel tower with bolts 3, and three bearings 2a and 2b integrally formed on the mounting bracket 2.
, 2c, a pair of protrusions 4a and 4b integrally formed on the upper part of the hanging metal fitting 4 are connected to each other by a connecting pin 5A in only one direction (in this embodiment, the horizontal direction perpendicular to the track direction P in FIG. 3). Rotatably supported. A connecting link 6 is inserted into the inside of the mounting portions 4c and 4d integrally formed in a bifurcated manner so as to be perpendicular to the projections 4a and 4b on the lower half of the hanging fitting 4, and It is connected to be rotatable in direction P.

Further, a horn mounting bracket 7 is connected to the connecting link 6 so as to be rotatable in the direction perpendicular to the railway line by a connecting pin 5C, and a pole clevis 8 is rotatably connected to the horn mounting bracket 7 in the direction of the railway line by a connecting pin 5D. A suspension insulator chain 10 as a support insulator, which is formed by connecting a large number of suspension insulators 9 in series, is suspended from the pole clevis 8 so as to be swingable in the direction of the railway line and in the orthogonal direction. Power transmission cotton 13 is connected to the lower end of the horn mounting bracket 11 and wire clamp 12.
is supported.

As shown in FIGS. 1 and 2, base ends 14a of mounting adapters 14 for lightning arrester 16 are attached to both sides of the hanging fitting 4.
is rotatably supported by the connecting pin 5B.

This base end portion 14a is brought into contact with a stopper 4e integrally formed to project from the side surface of the hanging fitting 4, and can hold the mounting adapter 14 in a horizontally protruding position as shown in FIG. . A stopper 14b is connected and fixed between the base ends 14a of the mounting adapter 14 as shown in FIG. 2, and when the connecting link 6 is rotated counterclockwise in FIG. 14b is pushed in the same direction by the connecting link 6, and the mounting adapter 14 is pushed into the connecting pin 5B.
They are rotated in the same direction around the center.

A lightning arrester 16 is suspended and fixed to the lower surface of the tip of the mounting adapter 14 by a bolt with an electrode fitting 17 on the ground side. The center axis 01 of this lightning arrester 16 is located within a vertical plane passing through the rotation axis 02 of the hanging fitting 4. Further, as shown in FIG. 3, an arc horn 19 on the grounding side is attached to the electrode fitting 18 on the energizing side at the lower end of the lightning arrester 16.
is supported.

On the other hand, on the horn mounting bracket 11, an arc horn 20 on the energized side in the direction of the overhead line is cantilevered by a bolt, and a predetermined air discharge gap is provided between the arc horn 20 and the arc horn 19. G is provided.

The lightning arrester 16 includes a voltage-resistant insulating cylinder (the path shown in the figure) formed in a cylindrical shape from a tensile material such as FRP, and a zinc oxide (Z n
A current-limiting element (the path shown in the figure) whose main material is O), the camp-shaped electrode fittings 17 and 18 on the energizing side and the grounding side that are fitted and fixed to both ends of the voltage-resistant insulating cylinder, and the voltage-resistant insulating tube. It is formed by a rubber mold 21 provided on the outer periphery of the cylinder.

Incidentally, the picture electrode fittings 17 and 18 of the lightning arrester 16 are provided with arcing rings 22 and 23 for reducing damage to the rubber mold 21 during creeping flash.

On the other hand, the horn mounting brackets 7 and 11 have a suspension insulator chain 1.
Arcing horns 24A, 24B, and 25 are installed to reduce damage caused by creeping flash. Mounting part 24a of the right arc horn 24A, mounting part 7a of the mounting bracket 7
However, in order to prevent the insulator chain 10 from colliding with the horizontal part 14c of the mounting adapter 14 due to deflection in the track direction (rightward direction in FIG. 1), the mounting part 7a of the mounting bracket 7 is omitted, and It is also possible to fix the mounting portion 24a of the arc horn 24A to the horizontal portion 14c.

Alternatively, the left arc horn 24B may be formed integrally with the connecting link 6, and the horn mounting bracket 7 and the pole clevis 8 may be integrated to shorten the connection length.

The horizontal axis of the mounting adapter 14 is preferably set slightly upward in order to prevent rainwater from the support arm 1 from flowing into the discharge gap G of the lightning arrester 16.

As shown in FIG. 3, the connecting pin 5B, which is the center of rotation of the suspension insulator chain 100, and the arc horn 19 on the energizing side and the grounding side.
．． 20 are straight lines, and when the suspension insulator chain 10 swings in the line direction P around the connecting pin 5B, the variation in the discharge gap G is minimized. I'm trying to make it happen.

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

Now, when a surge current due to a lightning strike flows through the power transmission line 13, this current is transferred from the arc horn 20 to the arc horn 19 via the horn mounting bracket 11, and the surge current flows through the lightning arrester 1.
Passing through the current limiting element built in 6, the mounting adapter 14,
Flows to the support arm 1 via the hanging metal fitting 4 and the mounting metal fitting 2,
discharged to the earth. The follow-on current that occurs thereafter is caused by the current limiting element (
(path shown in the figure) and the discharge gap G prevent the ground fault from occurring.

Now, in the embodiment of the present invention, in contrast to the mounting bracket 2, the hanging bracket 4 is
is supported rotatably only in the direction orthogonal to the track, and this hanging metal
The lightning arrester 16 is attached via the mounting adapter 14, and the rotation axis 02 of the hanging bracket 4 and the center axis 01 of the lightning arrester 16
are located in the same vertical plane, so mounting bracket 2
To stably hold the lightning arrester 16 without applying an eccentric load to the connecting pin 5A and the mounting adapter 14, and without causing the lightning arrester 16 to swing even if the suspension insulator chain 10 swings in the track direction. I can do it.

Also, by locating the arc horn 20 outside the arc horn 19 and setting the line connecting the tips of both arc horns 19 and 20 and the connecting pin 5B to be a straight line, changes in the discharge gap length can be achieved. can be suppressed to a minimum.

Further, when the suspension insulator chain 10 swings in the direction perpendicular to the track, the hanging metal fitting 4 is rotated in the same direction around the connecting pin 5A, and the lightning arrester 16 is accordingly rotated. Lightning insulator 1
There is a difference in the deflection angle between the lightning arrester and the suspension insulator chain 10 due to the weight of the lightning arrester 6, but this can be done by making the tip of the arc horn 19 an arc in the direction perpendicular to the line as shown in FIG. can prevent changes in

Furthermore, since the suspension fitting 4 of the lightning arrester 16 is controlled by the mounting fitting 2 and the connecting pin 5A to rotate in the direction of the track, no weight is required to counterbalance the lightning arrester 16. Therefore, there is no need for the mounting member for the weight.
Therefore, the entire device is made smaller and lighter, the number of parts is reduced, and manufacturing becomes easier.

Furthermore, even if the power transmission line 13 were to be severed and the suspension insulator chain 10 was suddenly thrown upwards around the upper connecting pin 5B, the connecting link 6 would prevent the stopper 14 of the mounting adapter 14 from breaking.
b is pushed, the mounting adapter 14 is rotated in the same direction, and the lightning arrester 16 is rotated upward as shown in FIG. As a result, harm to humans and animals due to damage and falling of the ryo tokuko is prevented.

Note that the present invention can also be embodied as follows.

(1) As shown in FIG. 6, the mounting part 4c of the hanging fitting 4,
4d, insert the upper end of the horn mounting bracket 7 (having the same function as the connecting link 6) and connect it rotatably with the connecting pin 5B, and use the horn mounting bracket 7 to push the stopper 14b of the mounting adapter 14. to make it move. Further, the tip of the mounting adapter 14 is tilted upward,
The lower end of the lightning arrester 16 is inclined so as to be separated from the suspended insulator chain 10.

(2) As shown in FIGS. 7 and 8, a mounting adapter 14 is rotatably connected to the hanging fitting 4 by a connecting pin 5B, and a connecting link is attached to the mounting adapter 14 by a connecting pin 5. 6 is rotatably supported, and the lightning arrester 16 is lifted upward together with the mounting adapter 14 with the intermediate portion 6a of the connecting link 6 in contact with a stopper 14d provided at the base end of the mounting adapter 14. To do so. In addition, in this embodiment, the stopper 14e provided at the upper part of the base end 14a of the mounting adapter 14 is connected to one of the mounting parts 4 of the hanging fitting 4.
By coming into contact with the inner surfaces of c and 4d, the mounting adapter 14
is held horizontally.

In this embodiment, when the suspension insulator chain 14 rotates counterclockwise in FIG.
Therefore, since the mounting adapter 14 is rotated to some extent by the rotation of the suspension insulator chain 10, the impact when the mounting adapter 14 collides with the connecting link 6 is alleviated.

(Effects of the Invention) As detailed above, the lightning horn insulator device of the present invention has the following features:
By omitting the weight, it is possible to reduce the size and weight of the lightning arrester, stabilize the mounting state of the lightning arrester in the column, and stabilize the discharge characteristics by keeping the discharge gap constant. It is possible to suppress the inertia force by regulating the direction of the power transmission line, and prevent collision between the support insulator and the lightning arrester insulator in the event that the power transmission line is severed, thereby preventing damage and falling of both insulators. This has the effect of reducing the mechanical strength of the mounting fittings and hanging fittings, thereby facilitating manufacturing.

[Brief explanation of the drawing]

Fig. 1 is an enlarged front view of the main parts of a lightning protection insulator device showing an embodiment of the present invention, Fig. 2 is an enlarged exploded perspective view of the main parts, and Fig. 3 is a front view of the entire lightning protection horn insulator device. , 4th
The figure is a sectional view taken along the line A-A in Figure 3, Figure 5 is a front view showing the suspension insulator chain rotated upward, and Figure 6 is a front view of a lightning horn insulator device showing another example of the present invention. , FIG. 7 is a partial front view of a main part showing another example of the present invention, FIG. 8 is a partial perspective view of FIG. 7, and FIG. 9 is a front view showing a conventional lightning arrester device. DESCRIPTION OF SYMBOLS 1... Support arm, 2... Mounting bracket, 2a, 2b. 2C...bearing part, 4...hanging metal fittings, 4a, 4b...
・Protrusion, 4c, 4d... Attachment part, 4e... Stopper, 5A to 5E... Connecting hinge, 6... Connecting link, 7
...Horn mounting bracket, 8...Pole clevis, 9.
... Suspension insulator, 10... Suspension insulator chain, 13... Power transmission line, 14... Mounting adapter, 14a... Base end, 1
4b, 14d. 14e...Stopper, 14c...Horizontal part, 16...
・Lightning insulator, 19.20...Arc horn, 01...
- Center axis of lightning arrester, 02... Rotation axis of hanging fitting, G... Air discharge gap. Patent applicant Nippon Insulator Asahi Malleable Iron Co., Ltd.
Co., Ltd.

Claims (1)

[Claims] 1. Support the hanging bracket so that it can rotate in only one direction via the mounting bracket with respect to the support arm of the steel tower, and connect the connecting link to the hanging bracket in a direction perpendicular to the direction of rotation of the hanging bracket. A power transmission line is suspended from the connecting link via a support insulator, and a mounting adapter is also extended to the side by a stopper provided on the hanging metal fitting. The mounting adapter includes a lightning arrester that can be held in a predetermined position and can be rotated upward by rotation of the connecting link, and the mounting adapter includes a current limiting element with nonlinear voltage-current characteristics. installed so that the rotational axis of the hanging fitting and the central axis of the lightning arrester are located in substantially the same vertical plane, and the arc horn on the power-supplying side provided on the power transmission line side and the lightning arrester 1. A lightning-proof horn insulator device, characterized in that a ground side arc horn provided at a tip portion faces each other with a predetermined air discharge gap.