JP2607611B2 - Insulator mounting adapter for lightning horn insulator device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention quickly discharges an abnormally high voltage caused by a lightning strike when applied to the transmission line, and generates a transmission line with a subsequent flow arc generated thereafter. The present invention relates to a mounting adapter for a supporting insulator and a lightning arrester used for a lightning-resistant horn insulator device for an overhead transmission line for preventing a ground fault accident, particularly for a tension tower.

(Prior Art) In general, in a tension insulator device for a transmission line, a jumper wire is connected between ends of a pair of tension insulators so as to maintain air insulation between the transmission line and a tower support arm. ing.
This jumper wire is easy to roll by wind, for example, 40m /
At a wind speed of sec, the deflection angle is about 60 degrees, and even in this state, it is designed so that the aerial insulation clearance between the jumper wire and the steel tower can be sufficiently secured.

However, in recent years, a lightning-resistant horn insulator device in which a lightning arrester is incorporated in this tension-resistant insulator device has been implemented, and an insulator device as shown in FIG. 7 has been proposed.
In this device, a supporting insulator 25 for supporting a jumper wire 20 is fixed to a supporting arm 1 of a tower in a hanging manner, and an arc horn 34 on a power application side is supported on a lower end of the insulator 25. A lightning arrester 29 in which a non-linear resistance element such as zinc oxide is enclosed is fixed to a lower part 1 via a mounting adapter 41, and the arc horn is attached to a lower end portion of the lightning arrester 29.
An arc horn 37 on the ground side facing the air horn 34 with a predetermined air discharge gap G was mounted.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional lightning-resistant horn insulator device, the upper bracket 26 of the supporting insulator 25 is attached to the base end of the mounting adapter 41.
Is fixed by bolts 3, so that the support insulator 25 must be fixed to the support arm 1 by bolts at the same time when the mounting adapter 41 is attached. As a result, there is a problem that the mounting work is troublesome. there were. In addition, there was no flexibility in responding to individual existing towers.

Further, the horizontal retracting angle of the transmission line, that is, the tension insulator (not shown) with respect to the support arm 1 as viewed from a plane according to the location conditions of the tower or the installation condition of the transmission line (hereinafter, this is referred to as the horizontal retraction angle of the tension insulator). Becomes a tilt angle other than a right angle, the jumper wire 20 is displaced outward (to the right in FIG. 7) or inward (to the left in FIG. 7) from the tip of the support arm 1 accordingly. Insulator 25 supporting jumper wire 20
It is necessary to forcibly pull the wire to the lower wire gripping bracket 35, or remove one end of the jumper wire 20 and add an auxiliary jumper wire prepared separately.As a result, the work of mounting the pole is extremely troublesome, and from this point It has been difficult to apply it to existing tension insulator devices.

The current-carrying area of the jumper wire 20 is, for example, 610 mm ² , 11
In the case of a large diameter such as 60 mm ² , the above-described pulling work was extremely difficult because the bending rigidity of the jumper wire itself was high.

In view of the above circumstances, the object of the present invention is to make it possible to easily attach the support insulator and the lightning arrester to the support arm, and to displace the jumper wire even when the horizontal drop angle of the tension insulator is an inclined angle. It is an object of the present invention to provide an insulator mounting adapter for a lightning-resistant horn insulator device which can be easily mounted without making it longer or longer, and can be applied to an existing tension insulator device very easily. .

(Means for Solving the Problems) In order to achieve the above object, a lightning-resistant horn insulator device according to the present invention includes: an arm attachment portion attached to a support arm of a steel tower;
A spacer connected to the lower surface of the arm mounting portion, and an adapter body connected to the spacer, integrally formed,
Further, the adapter body has a configuration in which a connecting portion of a supporting insulator for connecting a transmission line and a connecting portion for connecting a lightning arrester are provided apart from each other.

Further, it is preferable that the adapter body is attached to the spacer so that the position of the adapter body can be adjusted.

(Operation) In the mounting adapter of the present invention, the upper arm mounting portion is mounted on the support arm of the tower, then the supporting insulator is mounted on one connecting portion provided on the lower adapter body, and then the other is mounted on the other. It can be simply and easily mounted through a process of mounting a lightning arrester on the connecting portion of.

Even if the horizontal pull-in angle of the tension insulator becomes an inclination angle and the jumper wire is separated inward or outward from the support insulator, by selecting a mounting adapter having an adapter body corresponding to that, the existing Application to a tension insulator device becomes easy.

Further, when the adapter body is mounted on the spacer so as to be adjustable in position, the suspension position of the supporting insulator can be adjusted to an appropriate position in accordance with the mounting device of the jumper wire.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

As shown in FIG. 2 and FIG.
, A mounting plate 2 is fixed by bolts 3, and a tension insulator device 5 for supporting a transmission line 4 is mounted on each of the left and right ends of the mounting plate 2. U clevises 6 and 7 are connected to the end of the mounting plate 2. A tower-side horn mounting bracket 9 provided with an arc horn 8 is connected to the U clevis 7 by a shaft 10, and a tension insulator 12 is connected to the one end of the bracket 9 by a shaft 10. In this embodiment, the tower-side connecting fitting 11A is constituted by the U clevises 6, 7 and the tower-side horn mounting fitting 9 described above.

A wire-side horn mounting bracket 15 provided with an arc horn 14 via a connecting link 13 is provided at the power-receiving-side end of the tension insulator 12.
Connected by 10. A connection link 17 is connected to the center of the horn mounting bracket 15 by a shaft 16, and a wire clamp 18 for clamping the transmission line 4 is connected to the link 17 by the shaft 16. Also, the right and left wire clamps 18,1
Jumper wire 2 is connected between 8 by jumper wire clamp 19.
0 is erected in an arc shape. In this embodiment, the connection link 13, the wire-side horn mounting bracket 15, the connection link 17
The electric wire side connection fitting 11B is constituted by the electric wire clamp 18 and the like.

On the other hand, a mounting adapter 21 is provided at the tip of the support arm 1.
Are supported by the bolt 3 so as to be directed horizontally and in the front-rear direction of the support arm 1. As shown in FIG. 1, the mounting adapter 21 has an arm mounting portion 22 having a bolt insertion hole 22a which is tightened and fixed to the support arm 1 by the bolt 3 via the mounting plate 2, and an arm mounting portion 22. Spacer fixed to the lower surface of
23, and a flat adapter body 24 welded to the lower end surface of the spacer 23.

As shown in FIG. 3, a bolt insertion hole 28a for tightening and fixing an upper metal fitting 26 of a support insulator 25 for supporting the jumper wire 20 with a bolt 27 is provided at one end of the adapter body 24.
(See FIG. 1). On the other hand, as shown in FIG. 3, a lightning arrester insulator connecting portion 32 having a bolt insertion hole 32a for tightening and fixing the ground electrode 30 of the lightning arrester 29 with a bolt 31 is formed at the other end of the adapter body 24 as shown in FIG. Have been.

Further, an electric wire gripping metal 35 that also serves as a gripping function of the arc horn 34 on the power receiving side is attached to the lower metal fitting 33 of the support insulator 25. In this electric wire gripping bracket 35, the horizontal pull-in angle of the tension insulator 12 has an inclination angle, and the jumper wire 20 is displaced from the normal position, that is, from a vertical line passing through the tip of the support arm 1 to the tower main body side. Holding the jumper wire 20.

The lightning arrester 29 connected to the lightning arrester insulator connecting portion 28 of the adapter main body 24 has a built-in non-linear resistance element Z, and the power-supply-side electrode fitting 36 provided at the lower end of the lightning arrester 29 has 3
Arc horn as a ground-side discharge electrode as shown
37 is attached, and the electric wire gripping bracket 35 of the support insulator 25 is attached.
And a predetermined air discharge gap G attached to the arc horn 34
Are arranged facing each other.

The adapter body 24 and the electrode fitting 36 are provided with arcing rings 38, 3 for preventing the lightning arrester insulator 29 from creeping along the surface.
9 are attached.

Here, in order to operate this device normally, the insulation strength of the lightning-resistant horn insulator device including the air discharge gap G withstands the operating voltage and the switching surge voltage, and the insulation device device withstands the lightning surge voltage. The insulation strength of No. 5 is given a certain tolerance or more.

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

When an abnormally high voltage caused by a lightning strike is applied to the transmission line 4, the current at this time is transmitted via the jumper wire 20 to the air discharge gap G properly held between the arc horn 34 and the arc horn 37. And flows to the support arm 1 of the tower via the non-linear resistance element Z built in the lightning arrester 29. or,
The subsequent arc generated thereafter is interrupted by the air discharge gap G and the non-linear resistance element Z.

In particular, in the present invention, an arm mounting portion 22 is provided on the upper portion of the mounting adapter 21, an adapter main body 24 is connected from the mounting portion 22 via a spacer 23, and a connecting portion of the supporting insulator 25 and the lightning arrester 29 is connected to the main body 24. Since the mounting adapters 28 and 32 are respectively formed, the entire mounting adapter 21 can be mounted on the support arm 1 as a single item, and then the supporting insulator 25 is mounted on the supporting insulator connecting portion 28, and then the other connecting portion 32 The lightning arrester 29 can be attached to the support arm 1 alone, and therefore, the mounting of the mounting adapter 21 to the support arm 1 and the mounting of the supporting insulator 25 and the lightning arrester 29 to the mounting adapter 21 can be performed very easily.

In the above embodiment, the two connecting portions 28, 3
2 is provided, but in this case, the device can be stabilized by balancing the own weight of the supporting insulator 25 and the own weight of the lightning arrester 29.

In addition, after attaching both insulators 25 and 29 to the mounting adapter 21, the mounting adapter 21 can be easily mounted on the support arm 1.

Further, even if the horizontal retraction angle of the tension insulator 12 becomes an inclination angle and the jumper wire 20 is separated from the support insulator 25, by selecting a mounting adapter 21 having an adapter body 24 suitable for it, the support insulator 25 Jumper wire to wire gripping bracket 35
Since the 20 can be easily connected, there is no need to apply a mechanical bending load to the support insulator 25 or change the length of the jumper wire 20, facilitating the application to existing towers. That can be done.

 Further, the present invention can be implemented as follows.

(1) As shown in FIG.
23 Cantilever the horizontal direction from the lower surface.

(2) As shown in FIG. 5, the bolt insertion holes 28a and 32a formed in the two connecting portions 28 and 32 are elongated holes so that the mounting position of the support insulator 25 and the lightning arrester 29 in the horizontal direction can be adjusted. To configure.

(3) As shown in FIG. 6, the support arm 1 is clamped between the arm mounting portion 22 of the mounting adapter 21 and a separately prepared clamp 40, and the mounting adapter 21 is bolted through only the two members. To the support arm 1.

(4) Support insulator 25 and lightning arrester formed on adapter body 24
A height difference is provided between the connecting portions 28 and 32 with the connecting member 29 to facilitate application to the insulation clearance of the existing tension insulator device.

(5) The spacer 23 and the adapter main body 24 are connected by bolts so that the mounting angle between the arm mounting portion 22 and the adapter main body 24 can be adjusted. In this case, the suspension position of the support insulator 25 can be adjusted to an appropriate position by changing the mounting angle of the adapter body 24 according to the mounting position of the jumper wire 20.

(Effects of the Invention) As described in detail above, the present invention has an effect that the work of attaching the mounting adapter to the support arm and the work of attaching the supporting insulator and the lightning arrester to the mounting adapter can be performed extremely easily.

In addition, the present invention can appropriately change the length of the jumper wire or pull the jumper wire toward the support insulator without being affected by the installation condition of the jumper wire by appropriately selecting the dimensions of the mounting adapter body. Therefore, the present invention can be easily applied to an existing tension insulator device, and can exert an excellent effect of stabilizing the device without applying a mechanical bending load to the support insulator.

In addition, when the adapter body is attached to the spacer so as to be adjustable in position, the suspension position of the supporting insulator can be adjusted to an appropriate position according to the mounting position of the jumper wire.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a perspective view of a mounting adapter, FIG. 2 is a front view showing a lightning-resistant horn insulator device as a whole, and FIG. AA in the figure
4 and 5 are perspective views showing another example of the mounting adapter of the present invention, FIG. 6 is a sectional view showing another example of the present invention, and FIG. 7 is a side view showing a conventional example. It is. DESCRIPTION OF SYMBOLS 1 ... Support arm, 4 ... Transmission line, 5 ... Tension insulator device, 12 ... Tension insulator, 15 ... Wire-side horn mounting bracket, 20
… Jumper wire, 21… Mounting adapter, 22… Arm mounting part, 23… Spacer, 24… Adapter body, 25…
Support insulator, 26 …… Top bracket, 27,31 …… Bolt, 28 ……
Support insulator connecting part, 29: Lightning arrester, 30: Grounding electrode fitting, 32: Lightning arrester connecting part, 33: Lower metal fitting, 34: Arc horn on power application side, 35: Electric wire gripping fitting, 36 ... Electrical metal fitting on the charging side, 37 ... Arc horn on the grounding side.

Claims (2)

(57) [Claims] 1. An arm attachment portion (22) attached to a support arm (1) of a steel tower, a spacer (23) connected to a lower surface of the arm attachment portion (22), and an attachment to the spacer (23). With the adapter body (24).
The adapter body (24) is provided with a connecting portion (28) of a supporting insulator (25) for supporting the power transmission line (4) and a connecting portion (32) for connecting a lightning arrester (29). An insulator mounting adapter for a lightning-resistant horn insulator device. 2. The adapter body (24) with respect to the spacer (23).
2. The insulator mounting adapter for a lightning-resistant horn insulator device according to claim 1, wherein the adapter is mounted so as to be adjustable in position.