JP2540108Y2 - Transmission line support device with lightning arrester - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission line supporting device provided with an arrester.

[0002]

2. Description of the Related Art A conventional apparatus shown in FIG.
No. 51), a flat yoke 52 is attached to a tower arm 51 by a support shaft 53 so as to be swingable in a direction perpendicular to the line.
A transmission line support device 54 is connected to the lower end of the cable 52, and an arrester 55 is fixed to the lower end of the other end. And the lightning arrester 55
The conductor-side horn electrode 57 of the transmission line supporting device 54 having a predetermined air discharge gap with the horn electrode 56 is arranged orthogonal to the electric wire 11 held by the suspension clamp 58. For this reason, even if the electric wire 11 jumps up, the conductor-side horn electrode 57 can secure a separation distance from the electric wire.

Accordingly, the conductor side housing of the transmission line support device 54 is provided.
In the conventional device in which the contact electrode 57 and the yoke 52 are taken in the line direction, the height of the lightning arrester is increased so that the conductor-side horn electrode and the electric wire can be kept separated from each other even if the electric wire jumps up.
Therefore, problems such as clearance with the upper line and enlargement of the yoke fitting do not occur.

[0004]

However, in the conventional product as shown in FIG. 6, there is a danger that the transmission line support device 54 will abnormally approach or contact the lightning arrester 55 when the electric wire sways. further,
If the vertical load of the transmission line support device 54 decreases or becomes zero due to the jumping of the electric wire due to a jump, etc., the lightning arrester 55 may rotate by its own moment of moment and collide with the transmission line support device 54. .

The yoke 52 to which the transmission line support device 54 and the lightning arrester 55 are attached is a single support shaft 5 orthogonal to the yoke 52.
Since the lightning arrester 55 is mounted in a balanced manner on the tower arm 51 at 3, the distance between the horn electrodes 56 and 57 changes, for example, even if the load on the lightning arrester 55 slightly changes.

The present invention has been made in view of the above points, and it is possible to avoid a collision or abnormal approach between a lightning arrester and a transmission line support device due to lateral swing of a wire or rotation of a yoke. It is an object of the present invention to provide a transmission line support device provided with a lightning arrestor in which a distance between electrodes is not changed by a small load change.

[0007]

In a transmission line supporting apparatus provided with a lightning arrester according to the present invention, a yoke 4 can be swung by a support shaft 3 on an arm 1 of a power transmission tower in a direction perpendicular to the line. And a predetermined distance between the conductor-side horn electrode 17 of the transmission line support device 7 connected to one end of the yoke 4 and the horn electrode 16 of the lightning arrester 8 fixed to the other end of the yoke 4. Wherein the lightning arrester 8 is disposed on the left front or right front of the transmission line support device 7 as viewed from the tower body side.

For this reason, even if the electric wire oscillates horizontally or the lightning arrester 8 is rotated by its own weight moment due to a sleep jump or the like, the lightning arrester 8 is not in the direction perpendicular to the line of the transmission line support device 7. From the lightning arrester 8 and the transmission line support device 7
Does not collide with or abnormally approach. Further, in the present invention, as shown in FIG. 4, the moment of the force caused by the vertical load change of the arrester 8 with respect to the support shaft 3 provided on the arm 1 side is ΔW1 · L1sinθ. Therefore, the power flow due to the change in the vertical load of the surge arrester that is orthogonal to the track
It is remarkably small as compared with the element ΔW1 · L1. Further, the moment of force ΔW1 · L1cos due to the change in the vertical load of the arrester 8
θ means that the bearing portion 5 of the yoke 4 fitted on the support shaft 3 is twisted to increase the frictional force. For this reason, the yoke 4 does not move unless the vertical load of the arrester 8 changes to some extent.

The conductor-side horn electrode 17 of the transmission line support device 7
By arranging it in front of the track 11 as viewed from the tower body side, it is possible to avoid abnormal approach or contact with the electric wire jumping up by a slant jump or the like.

[0010]

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 1 denotes an arm of a power transmission tower.
Is a yoke mounting bracket fixed to the lower surface of the arm tip. The yoke 4 is mounted on the support shaft 3 so as to be swingable in a direction perpendicular to the line. The yoke 4 connects the upper end of the transmission line support device 7 to the clevis portion 6 at the yoke end closer to the bearing portion 5 fitted on the support shaft 3, and the upper end of the lightning arrester 8 is connected to the other end of the yoke 4. The part is fixed.

The transmission line supporting device 7 holds the electric wire 11 with the suspension clamp 10 at the lower end. Opposing arc horns 13 and 14 are attached to the upper and lower ends of the insulator string 12, and a conductor-side horn electrode 17 is attached to the conductor side. There is a discharge gap.

As shown in FIG. 4, the yoke 4 has a vertical axis including an axis 20 of the lightning arrester 8 fixed to the other end of the yoke and an axis 21 of the transmission line supporting device 7 connected to one end of the yoke. Although the surface 22 intersects the support shaft 3 and the electric wire 11 at a predetermined angle θ, the actual shape is as shown in FIGS. The bent portions 24 and 25 having opposite directions are integrally formed on the yoke portion 23.
A bearing portion 5 for fitting the support shaft 3 is protruded from the top of the shaft. And the clevis part 6 protrudes below the tip of the bent part 24,
A yoke portion 26 to which the lightning arrester 8 is attached is connected to the bent portion 25 with a bolt 27.

FIG. 5 is a perspective view of another embodiment of the present invention.
The yoke 4 has a bearing portion 30 fitted to the support shaft 3 formed separately from the yoke 4 and attached to the yoke 4 with bolts 31. The power transmission line support device 7 is attached to the projection via a right angle clevis 33.

The lightning arrester 8 is arranged on the left front side of the transmission line support device 7 as viewed from the tower body side. The conductor-side horn electrode 17 of the transmission line support device 7 is arranged between the lightning arrester 8 and the electric wire 11 (FIG. 3).

In FIG. 4, when the moment of the force around the support shaft 3 is obtained,

(Equation 1) Becomes

[0016]

On the other hand, the conventional device shown in FIG.
Since the hook 52 is orthogonal to the support shaft 53 and the electric wire 11, the moment of force of the lightning arrester 55 is W1 · L1, and the moment of force of the transmission line support device 54 is W2 / L2. Therefore, the force moment of the present embodiment becomes smaller by multiplying the force moment of the conventional device by (1−sin θ).

In FIG. 4, when the vertical load of the lightning arrester 8 or the transmission line supporting device 7 changes by .DELTA.W1 or .DELTA.W2, the bearing portion 5 moves the force moment .DELTA.W1.L1cos .theta.
Alternatively, since friction is caused on the support shaft 3 by ΔW2 · L2cos θ, the frictional resistance increases as compared with the conventional device in which the yoke is arranged at right angles to the support shaft.

[0019]

As described above, according to the present invention, the lightning arrestor fixed to one end of the yoke is located at the left front or right front of the transmission line support device attached to the other end of the yoke as viewed from the tower body side. Since they are arranged, the power transmission line support device does not collide with the lightning arrester or abnormally approach due to the horizontal swing of the electric wire or the rotation of the yoke.

The yoke provided with the lightning arrester and the transmission line support device is arranged orthogonally to the line so that the yoke can swing in the direction perpendicular to the line. The yoke does not move unless the vertical load of the lightning arrestor or the like changes to some extent, which helps to maintain the interval between the horn electrodes. .

Since the conductor-side horn electrode of the transmission line supporting device is disposed in front of the line when viewed from the tower body side, even if the electric wire jumps up, it does not approach the electric wire or come into contact with the electric wire.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a side view of the embodiment of the present invention.

FIG. 3 is a partially cutaway plan view of an embodiment of the present invention.

FIG. 4 is a diagram illustrating the moment of the force around the support shaft supporting the yoke in the embodiment of the present invention.

FIG. 5 is a partially cutaway front view showing another embodiment of the yoke according to the present invention.

FIG. 6 is a front view of a conventional device.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Arm 3 Support shaft 4 Yoke 7 Transmission line support device 8 Lightning arrester 11 Line 16 Horn electrode 17 Conductor-side horn electrode

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nakamura Achievement 13-1 Isojima Minamicho, Hirakata City, Osaka Nippon Katan Corporation (72) Inventor Akihiro Katayama 131-1 Isojima Minamicho, Hirakata City, Osaka Inside the corporation

Claims (2)

(57) [Scope of request for utility model registration] 1. A yoke is attached to an arm of a power transmission tower so as to be swingable in a direction perpendicular to the line with a support shaft, and a conductor-side horn electrode of a transmission line supporting device connected to one end of the yoke. When a predetermined air discharge gap is secured between the lightning arrester and the horn electrode fixed to the other end of the yoke, the lightning arrester is disposed on the left front or right front of the transmission line support device as viewed from the tower side. A transmission line support device provided with an arrester. 2. The transmission line supporting device provided with a lightning arrester according to claim 1, wherein the conductor-side horn electrode of the transmission line supporting device is disposed in front of the line as viewed from the tower body side.