JPH0654625B2 - Lightning protection horn insulator device - Google Patents

Description

Description: TECHNICAL FIELD The present invention is directed to grounding a high voltage caused by lightning when a high voltage is applied to a transmission line, and at the same time, to a power transmission line using a continuous-current arc generated thereafter. The present invention relates to a lightning protection horn insulator device for an overhead power transmission line for preventing bath break.

[Prior Art] As a conventional lightning protection horn insulator device of this type, for example,
A structure as shown in Japanese Patent Application Laid-Open No. 62-209373 is known.

In this conventional configuration, a bracket is fixed to the lower part of the tip of the support arm of the tower, and a mounting bracket is rotatably supported on the bracket so as to extend in the tip direction of the support arm. A suspension insulator for supporting the electric wire is rotatably suspended at the base end of the mounting bracket, and a lightning protection insulator is suspended and fixed at the tip of the mounting bracket. The discharge electrode projecting toward one side and the discharge electrode attached to the lower part of the lightning protection insulator are opposed to each other with a predetermined air discharge gap.

The mounting bracket is rotatably attached to a bracket, and a suspension link supporting the suspension insulator at a lower end portion thereof, and the bracket and the suspension link so as to extend in a tip direction of a support arm. It is rotatably attached to the lower end of the link,
The first and second movable support arms support the lightning protection insulator at the tip. And the first
The movable support arm of is formed in a bifurcated shape with a pair of arm pieces extending in parallel at a distance larger than the width of the support arm of the tower body, and is used to protect the lightning arrestor or suspension insulator from the shaking of the wire or wind pressure. Even if the mounting bracket is rotated in the direction orthogonal to the track due to the swing, the mounting bracket does not interfere with the support arm of the tower, and the mounting bracket collides with the support arm, causing the mounting bracket, lightning insulator, and suspension. It is designed to prevent the insulator from being damaged or damaged.

[Problems to be Solved by the Invention] However, in this conventional device, in order to avoid the interference of the first movable support arm of the mounting bracket with the support arm of the tower body, a space larger than the width of the support arm is provided. Since the first movable support arm and the bracket for supporting the first movable support arm are formed to have a wide width, the mounting bracket is large and heavy. There was a problem that became.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and an object of the present invention is to provide a wire fitting despite the fact that the mounting bracket can be made small and lightweight. The support arm does not interfere with the support arm of the tower even when the mounting bracket is rotated in the direction orthogonal to the track due to the swinging of the lightning arrestor or the suspension insulator due to the shaking of the wind or wind pressure. An object of the present invention is to provide a lightning protection horn insulator device capable of reliably preventing a mounting metal fitting, a lightning protection insulator, and a suspension insulator from being damaged or damaged due to a collision with.

[Means for Solving the Problems] In order to achieve the above object, in the lightning protection horn insulator device of the present invention, a mounting bracket is rotatably attached to a bracket at a lower end of a support arm of a tower body. Also, the suspension link supporting the suspension insulator at the lower end and the bracket and the lower end of the suspension link are rotatably attached to the lower end of the support arm so as to extend in the distal direction of the support arm, and lightning protection is provided at the distal end. It is composed of first and second movable support arms that support the insulator, and the first movable support arm extends obliquely from the base end portion at a predetermined angle and then extends in the front end direction of the support arm.
It is formed in a laterally curved shape.

[Operation] In the lightning protection horn insulator device configured as described above,
When the electric wire shakes, wind pressure, or the like acts on the device, the entire device, including the mounting bracket, swings in the direction orthogonal to the line around the connecting portion of the tower body with the support arm. Further, the suspension insulator independently swings in the direction orthogonal to the rotation direction of the mounting bracket. At this time, the first movable support arm of the mounting member is formed in a side-bent shape so as to extend in the distal direction of the support arm after descending obliquely from the base end portion at a predetermined angle.
Even if the first movable support arm is formed narrower than the support arm of the tower body, the attachment metal fitting is rotated in the direction orthogonal to the line without interfering with the support arm. Therefore, the mounting bracket, the lightning insulator and the suspension insulator do not collide with the support arm, and it is possible to prevent the damage and damage of them.

[Embodiment] An embodiment of a lightning protection horn insulator device embodying the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 2, a bracket 2 is fixed to the lower part of the tip of the support arm 1 of the tower body by a plurality of bolts 3 and nuts 4. A mounting bracket 5 is supported on the bracket 2 so as to extend in the front end direction of the support arm 1 so as to be vertically rotatable. A suspension insulator 7 for supporting the power transmission line 6 is rotatably suspended at the base end portion of the mounting bracket 5, and a lightning protection insulator 8 is suspended and fixed at the distal end portion.

Therefore, when the configuration of the mounting bracket 5 is described in detail,
As shown in FIGS. 1, 3, and 4, the bracket 2
A suspension link 10 having a substantially H-shaped side surface is attached to the shaft by a spindle so as to be rotatable in a direction orthogonal to the line. A first movable support arm 12 is attached to the bracket 2 by the support shaft 11 so as to be rotatable in the direction orthogonal to the line, and extends in the front end direction of the support arm 1 of the tower body. A second movable support arm 13 is rotatably attached to a lower end portion of the suspension link 10 by a support shaft 14 so as to be rotatable in a direction orthogonal to the line, and the support arms 1 of the tower body 1 are provided on both sides of the first movable support arm 12. Is extended in the direction of the tip.

The first movable support arm 12 has a reinforcing rib 15 on its inner surface.
A pair of arm pieces 15 formed by projecting a, a connecting piece 16 connected and fixed between the tip ends of the arm pieces 15, and a length attached to the connecting piece 16 by a pair of nuts 17 so as to be movable and adjustable. And a bolt 18 for adjusting the length, and a pivot 19 is rotatably connected to a projecting piece 21 on the lower surface of the mounting plate 20 for the lightning protection insulator 8 by a shaft 19 at a forked portion of the length adjusting bolt 18. There is. The second movable support arm 13 is composed of a pair of arm pieces 22 each having a reinforcing rib 22a protruding from the outer surface, and is welded and fixed to the lower surface of the mounting plate 20 at the tip of the arm pieces 22. ing.

Then, in this embodiment, as is apparent from FIGS. 1 and 3, after the arm piece 15 of the first movable support arm 12 descends obliquely from the base end portion at a predetermined angle R. The support arm 1 is formed in a side-bent shape so as to extend in the front end direction, and is formed in a substantially trapezoidal frame shape so as to be closer to the front end. As shown in FIG.
Even when the movable support arm 12 is rotated about the support shaft 11 in the line orthogonal direction, the arm piece 15 does not interfere with the support arm 1 of the tower body. Further, the arm piece 22 of the second movable support arm 13 is also formed in a side-face refraction shape and is also formed in a substantially planar trapezoidal frame shape, similarly to the arm piece 15 of the first movable support arm 12. ing.

Next, the supporting structure of the suspension insulator 7 with respect to the mounting member 5 will be described in detail. As shown in FIGS. 1 to 3, the right-angled clevis 23 is provided at the lower end portion of the suspension link 10 to the supporting shaft 1
A horn mounting member 24 is attached to the lower end of the horn 4 by a shaft 25 so as to be rotatable in the line direction. The suspension insulator 7 is rotatably supported by the shaft 26 at the lower end of the horn mounting bracket 24 so as to be rotatable in the track direction, and can be independently swung in the track orthogonal direction and the track direction at the lower end of the suspension link 10. It is like this.

A horn mounting bracket 27 is movably attached to the lower end of the suspension insulator 7 in the track direction, and the power transmission line 6 is attached to the lower part thereof.
A suspension clamp 28 is connected to support the.
The arc horn 2 is attached to the upper and lower horn mounting brackets 24 and 27.
9 and 30 are attached so that the damage of the suspension insulator 7 at the time of a surface flashover can be reduced. Also, the lower horn mounting bracket 2
A discharge electrode 31 on the charging side is attached to 7 and extends in an arc shape toward the lightning protection insulator 8 side.

Next, the supporting structure of the lightning protection insulator 8 with respect to the mounting metal fitting 5 will be described in detail. As shown in FIGS. 1 to 3, the lightning protection insulator 8 is suspended and fixed to the lower surface of the mounting plate 20 by a plurality of bolts 32. ing. Upper and lower electrode fittings 3 of lightning protection insulator 8
Arc horns 35, 36 are attached to 3, 34 so that damage to the lightning protection insulator 8 during a surface flashover can be reduced. Further, a ground side discharge electrode 37 curved in an arc shape centered on the shaft 26 of the suspension insulator 7 is attached to a lower portion of the lower electrode metal fitting 34 so as to extend in the line direction and be attached to It faces the discharge electrode 31 on the side with a predetermined air discharge gap G.

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

Now, when the load balance of the power transmission line 6 changes due to snowfall or the like and the power transmission line 6 sways in the track direction, the sway acts on the suspension insulator 7 via the suspension clamp 28, and the suspension insulator 7 becomes an axis. Although it is rotated about the line 26 in the track direction, the mounting member 5 and the lightning protection insulator 8 are kept stationary. Therefore, no unreasonable force acting on the mounting member 5 and the lightning protection insulator 8 is twisted. Also, in this case,
The discharge electrode 31 under the suspension insulator 7 is rotated in an arc shape around the shaft 26, and is moved substantially corresponding to the arc surface of the discharge electrode 37 under the lightning protection insulator 8. The gap G is kept substantially constant.

On the other hand, when the power transmission line 6 sways in a direction orthogonal to the line due to strong wind or the like, the suspension insulator 7 and the lightning protection insulator 8 are swayed in the same direction while being connected by the mounting bracket 5. At this time, the first movable support arm 12 of the mounting bracket 5 is connected to the pair of arm pieces 15
Is formed into a bifurcated shape, and its arm piece 15
Is bent sideways so as to extend obliquely from the base end portion at a predetermined angle R and then extends toward the distal end of the support arm 1. Therefore, as shown in FIG. The first movable support arm 12 does not collide with the support arm 1 of the tower even if it is swung to a large extent.

Therefore, as shown in FIG. 3, the first and second movable support arms 12 and 13 are formed in the shape of a trapezoidal frame having a planar taper,
The width thereof can be made smaller than that of the support arm 1 of the tower body, and the size and weight of the mounting bracket 5 can be reduced.
Further, in the above case, the suspension insulator 7 is relatively rotated about the support shaft 14 and held in a suspended state without being affected by the rotation of the lightning protection insulator 8 in the direction orthogonal to the line. Lower insulator 7
There will be no unreasonable force acting on the twist.

By the way, in the lightning protection horn insulator device having the above configuration, when an abnormally high voltage caused by a lightning strike is applied to the power transmission line 6, the current thereof is aerial discharge between the discharge electrode 31 on the voltage application side and the discharge electrode 37 on the ground side. It is discharged in the gap G, flows through the non-linear resistance element built in the lightning protection insulator 8 and flows to the support arm 1 of the tower body to be grounded. Further, the subsequent arm generated thereafter is suppressed and cut off by the air discharge gap G and the non-linear resistance element.

In addition, in the device of this embodiment,
Of the movable support arm 12 of the bolt 1 to the connecting piece 16
The length can be adjusted by changing the mounting position of 8. Therefore, when this device is mounted on the support arm 1 of each tower, first, the interval between the suspension insulator 7 and the lightning arrestor 8 and the air discharge gap G are set to predetermined dimensions, and then,
If the second movable support arm 13 tilting left and right according to the load of the transmission line 6 that changes for each tower body is corrected horizontally by adjusting the length of the first movable support arm 12, the suspension insulator 7 Also, the lightning protection insulator 8 can be hung at right angles from both ends of the mounting member 5 in a stationary state.

[Advantages of the Invention] Since the present invention is configured as described above,
Although the first movable support arm of the mounting bracket and the bracket supporting it can be formed narrower than the support arm of the tower body, the mounting bracket can be made small and lightweight, but Even when the mounting bracket is rotated in the direction orthogonal to the track due to the swinging of the lightning arrestor or suspension insulator due to wind pressure, the mounting bracket does not interfere with the supporting arm of the tower body and collides with the supporting arm. Due to the mounting bracket,
The excellent effect that it is possible to surely prevent the lightning insulator and the hanging insulator from being damaged or damaged.

[Brief description of drawings]

1 is a partially cutaway front view showing an embodiment of a lightning protection horn insulator device embodying the present invention, FIG. 2 is a front view showing the entire lightning protection horn insulator device in a reduced scale, and FIG. 3 is FIG. FIG. 4 is a partially cutaway plan view, FIG. 4 is a partial side view of FIG. 1, and FIG. 5 is a partially cutaway front view showing a state in which the fitting is rotated corresponding to FIG. 1 ... Tower support arm, 2 ... Bracket, 5 ... Mounting bracket, 6 ... Transmission line, 7 ... Suspension insulator, 8 ... Lightning arrester, 10 ... Suspension link, 12 ... 1 movable support arm, 13 ... 2nd movable support arm, 31 ... discharging side discharge electrode, 37 ... ground side discharge electrode, G ... air discharge gap.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuo Oribe 3538-3 Kamo, Kikugawa-cho, Ogasa-gun, Shizuoka Prefecture (72) Inventor Masao Yamauchi 5-16-16 Kurako, Toyokawa-shi, Aichi

Claims (1)

[Claims] 1. A bracket (2) is fixed to the lower part of the tip of a support arm (1) of a tower body, and a mounting bracket (2) is attached to the bracket (2) so as to extend toward the tip of the support arm (1). 5) is rotatably supported in the vertical direction, and a suspension insulator (7) for supporting the electric wire (6) is rotatably suspended at the base end of the mounting bracket (5), Mounting bracket (5)
A lightning protection insulator (8) is suspended and fixed at the tip of the discharge electrode (31) protruding from the lower side of the suspension lighter (7) and a discharge attached to the lower portion of the lightning protection insulator (8). A lightning protection horn insulator device in which an electrode (37) is opposed to a predetermined air discharge gap (G), the mounting bracket (5) being rotatably attached to a bracket (2) and having a lower end portion. A suspension link (10) supporting the suspension insulator (7) and a lower end portion of the bracket (2) and the suspension link (10) so as to extend in the tip direction of the support arm (1). The first movable support arm (12) is composed of first and second movable support arms (12, 13) that are rotatably attached and that support the lightning protection insulator (8) at the tip. , It should extend obliquely from the base end at a predetermined angle and then extend toward the tip of the support arm (1). Sea urchin
A lightning protection horn insulator device characterized in that it is formed in a laterally curved shape.