JPH01200521A - Lightning resistant horn insulator device - Google Patents

Abstract

PURPOSE:To prevent the fracture of e fitting, a lightning protection insulator and a hanging insulator due to collision with each other via a cable vibration and wind pressure by constituting the fitting with a pair of movable support arms and hanging the cable in such a way as to be capable of turn. CONSTITUTION:In a filling 3, the upper base plate of a bracket 9 is tightened and secured to the lower end of the tip of a support arm 2 with a bolt 8 and the axial support part 9b of the bracket 9 is integrated with the base plate. Also, the base plate is fitted with the upper end bearing part of a hanging link 10 via a shall 11 in such a way as to be capable of turn in a direction orthogonal with a cable way. A lower movable support arm 13 is so connected to the lower outer side of the link 10 via 8 shaft 12 as to be capable of turn and both ends of an upper movable support arm 15 is supported between a support frame 14 and the outside of the axial support part 9b in such a way as to be capable of turn via shafts 16 and 11. When an electric cable 4 vibrates in a cable way direction due to an external force, the vibration works upon a hanging insulator 5 via a suspension clamp 30 and the insulator 5 is turned in the cable way direction about the axis 24 of an orthogonal clevis 23. The fitting 3 and a lightening protection insulator 6, however, is held at a stationary position.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention promptly grounds the high voltage caused by lightning when it is applied to a power transmission line, and also prevents a ground fault in the power transmission line due to the follow-on arc that occurs afterwards. This invention relates to a lightning horn insulator device for overhead power transmission lines to prevent accidents.

[Prior Art] Conventionally, the discharge was avoided with a predetermined air discharge gap.
r! ! :15 There was a device as shown in FIG. 51 as a device for installing a child.

To explain this device, a U clevis 44 attached to an upper cap fitting 43 of a hanging insulator 42 is rotatably suspended from a U bolt 41 attached to a support arm 2 of a tower body 1. ing. The electric wire 4 is supported at the lower end of the hanging insulator 42 via a suspension clamp 46 attached to a lower cap metal fitting 45, and the lower cap metal fitting 45 also has a lower arc horn bent diagonally upward. 47 were sorbed. Further, a supporting metal fitting 48 extending laterally is fixed to the upper cap metal fitting 43, and a lightning arrester 49 is suspended and fixed to the tip of the metal fitting 48 so as to be inclined outward. Further, an arc horn 51 is attached to the lower electrode 50 of the lightning arrester 49 and is inclined downward and faces the arc horn 47 with a predetermined aerial discharge gap G.

[Problems to be Solved by the Invention] However, in the conventional device, the hanging insulator 42 is suspended from the support arm 2 via the U bolt 41 and the U clevis 44. It is possible to rotate in the direction perpendicular to the track direction, and when the electric wire 4 swings in strong winds or the device itself is subjected to wind pressure, the lightning arrester 49 and the hanging eyelet 42 can be rotated in the direction perpendicular to the track direction. It was shaking. As a result, there was a risk that the support metal fitting 48 and the upper electrode 50- of the lightning arrester 49 would collide with the support arm 2 due to the vertical swing of the entire device, resulting in damage and destruction. Particularly in existing steel towers, in order to ensure insulation clearance between the electric wires 4 and the lower support arm 2, the upper cap fitting 43 needs to be as close to the support arm 2 as possible, making the above-mentioned problems likely to occur. .

[Significance of the Invention] In view of the above circumstances, the present invention has been developed to prevent the mounting bracket from being attached to the support arm even if the mounting bracket rotates in a direction perpendicular to the railway line due to swinging of the electric wire or swinging of the lightning arrester or hanging insulator due to wind pressure. An object of the present invention is to provide a lightning-proof horn insulator device that can prevent damage to mounting fittings, lightning arresters, and hanging insulators due to collisions without interfering with lightning.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention fixes a bracket to the lower part of the tip of the support arm, and the bracket includes a bracket that extends toward the tip of the support arm. The mounting bracket is rotatably supported in the vertical direction, and the mounting bracket is configured with a pair of movable support arms located on both sides of the support arm so as not to interfere with the support arm. A suspension insulator for supporting the electric wire is rotatably suspended from the base end, a lightning arrester is suspended from the tip of the mounting bracket, and a lightning arrester is suspended from the tip of the mounting bracket, and a lightning arrester is suspended from the end of the mounting bracket. A configuration is adopted in which a discharge electrode attached to the lightning arrester and a discharge electrode attached to the lower part of the lightning arrester face each other with a predetermined air discharge gap.

[Function] By employing the above means, the present invention functions as follows.

When swings of electric wires, wind pressure, etc. act on the equipment, the equipment itself swings in a direction perpendicular to the line around the connection to the support arm of the tower body. Furthermore, the hanging insulator can also swing independently in a direction perpendicular to the rotating direction of the mounting bracket. At this time, since the mounting bracket rotates in the direction perpendicular to the track without interfering with the support arm, the mounting bracket, hanging insulator, and lightning arrester do not collide with the support arm, and damage to them is also prevented.

[Example] An example embodying the present invention will be described below with reference to FIGS. 1 to 4.

Schematically speaking, the insulator device shown in this solid line example extends from the lower surface of the tip of the support arm 2 of the tower body 1 toward the tip of the support arm 2,
an insulator mounting bracket 3 supported rotatably in the vertical direction;
It is composed of a hanging insulator 5 suspended from one end of the metal fitting 3 and supporting the electric wire 4, and a lightning arrester 6 fixedly suspended from the other end.

To explain the mounting bracket 3 in detail, a board 9a at the top of a bracket 9 is fastened and fixed to the lower surface of the tip of the support arm 2 by bolts 8, and a plurality of shaft supports 9b are integrally formed on the board 9a. . An upper end bearing portion 10a of a suspension link 10 shown in FIG. 3 is attached to the substrate 9a via a shaft 11 so as to be rotatable in a direction perpendicular to the track. A lower movable support arm 13 is rotatably connected to the lower outer side of the suspension link 10 by a shaft 12, and a support frame 14 welded to the upper surface of the movable support arm 13 and the bracket 9
Both ends of an upper movable support arm 15 having a U-shape in plan are rotatably connected to the outside of the shaft support 9b by shafts 16 and 11, respectively. A right-angled clevis 23 is supported by the shaft 12 between the lower end bearing portions 10b of the suspension link 10 so as to be rotatable in a direction perpendicular to the track.

The lower movable support arm 13 includes a pair of arm pieces 17 supported by the shaft 12, a U-shaped frame 18 welded to the tips of the arm pieces 17, and welded to the tips of the frame 18. It consists of a mounting plate 19 provided with mounting holes 19a for tightening and fixing the mounting flange 7 of the lightning arrester 6 with bolts. Further, the upper movable support arm 15 penetrates through the U-shaped arm piece 20 supported by the shaft 11, the connecting portion 20a of the arm piece 20.20, and the shaft 16 and the connecting portion 20a. and a length adjusting bolt 21 which is tightened and fixed with a nut 22.

In this embodiment, the hanging link 10, the upper and lower movable support arms 15, 13, and the support frame 14 constitute the mounting bracket 3.

The cap fitting 5a of the hanging insulator 5 is connected to the lower part of the right-angled clevis 23 via a connecting piece 25 which is rotatably connected to the railway line in a direction perpendicular to the rotating direction of the hanging link 10 by means of a shaft 24. are connected by a shaft 26 so as to be rotatable in the same direction as the rotation direction of the connecting piece 25, so that the hanging insulator 5 can also swing in the direction of the track.

A horizontal revis 27 is attached to the lower part of the hanging insulator 5, and a horn mounting bracket 29 is rotatable in the track direction by a shaft 28 on the horizontal revis 27. is connected to. Further, an arc horn 31 serving as a discharge electrode is attached to the horn fitting 29.

On the other hand, a discharge electrode 33 is provided on the lower electrode 32 of the lightning arrester 6.
is attached and faces the arc horn 31 with a predetermined air discharge gap G therebetween.

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

Now, if the load balance of the wire 4 changes due to snow accumulation etc. and the wire 4 swings in the direction of the track, the swing will be caused by the suspension clamp 3.
0 to the hanging insulator 5, and the hanging insulator 5 is rotated in the track direction around the axis 24 of the right-angled clevis 23, but the mounting bracket 3 and the lightning arrester 6 remain in a stationary position. be.

Furthermore, when the electric wire 4 swings in a direction perpendicular to the track due to strong winds, the hanging insulator 5 and the lightning arrester 6 are connected by the mounting bracket 3, so that they swing in the same direction. As shown in FIG. 4, the upper movable support arm 15 is formed in a bifurcated shape even if the mounting bracket 3 swings greatly, and the arm pieces 20 are configured to be located on both sides of the support arm 2 when viewed from above. , so it will not collide with the support arm 2. Furthermore, the hanging insulator 5
is not affected by the rotation of the insulator 5 in the direction perpendicular to the track, and the shaft 24
Because it is suspended so that it can rotate relative to the track direction around the center, there is no excessive force that could cause twisting.

By the way, when an abnormally high voltage due to a lightning strike is applied to the electric wire 4, it is discharged in the air discharge gap G between the arc horn 31 and the discharge electrode 33, and the non-linear resistance element built in the lightning arrester 6 is It then flows to the support arm 2 of the tower body. Furthermore, the subsequent arc generated thereafter is blocked by the air discharge gap G and the nonlinear resistance element.

Note that the mounting bracket 3 of this device is attached to the movable support arm 1.
The length can be adjusted using bolts 21 at No. 5.

Therefore, in order to install this device on the support arm 2 of each tower body, first, the clearance between the hanging insulator 5 and the lightning arrester 6,
Then, the movable support arm 13, which tilts from side to side due to the load of the electric wire 4 that changes depending on each tower body 1, is corrected horizontally by adjusting the length of the movable support arm 15. Then, the hanging insulator 5 and the lightning arrester 6 in a stationary state can be suspended perpendicularly to the movable support arm 13 of the mounting bracket 3, respectively.

[Effects of the Invention] As described in detail above, the present invention allows the mounting bracket to remain attached to the support arm of the tower body even if the mounting bracket rotates in the direction perpendicular to the track due to the vibration of the lightning arrester or hanging insulator due to strong winds or wind pressure. This has the effect of preventing damage to the mounting bracket, lightning arrester, and hanging insulator due to collision with the support arm.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment embodying this invention;
Figure 2 is a plan view, Figure 3 is an exploded perspective view of the mounting bracket, Figure 4 is an enlarged sectional view showing the mounting bracket rotated upward, and Figure 5 is a front view of the conventional example. . 2... Support arm, 3... Mounting bracket, 4... Electric wire, 5... Hanging insulator, 6... Lightning arrester, 9... Bracket, 10... Hanging link, 13 ...lower movable support arm. 15... Upper movable support arm, 23... Right angle clevis, 31... Arc horn, 33... Discharge electrode, G
...Air discharge gap.

Claims (1)

[Claims] 1. Attach the bracket (
9), and a mounting bracket (3) is supported on the bracket (9) by a shaft (11) so as to extend toward the distal end of the support arm (2) and to be rotatable in the vertical direction. death,
The mounting bracket (3) is composed of a pair of movable support arms (13, 15) located on both sides of the support arm (2) so as not to interfere with the support arm (2), and the mounting bracket (3) A suspension insulator (5) for supporting the electric wire (4) is rotatably suspended from the base end of the mounting bracket (3), and a lightning arrester (6) is suspended from the tip of the mounting bracket (3). , a discharge electrode (31) attached to extend laterally to the lower part of the hanging insulator (5), and a discharge electrode (33) attached to the lower part of the lightning arrester (6). is the predetermined air discharge gap (G
) A lightning-resistant horn insulator device, characterized in that the horns are opposed to each other.