JPH0636152U - Conductor suspension device with lightning arrester - Google Patents

Abstract

(57) [Summary] [Purpose] Maintain a predetermined air gap regardless of fluctuations in the vertical load of the wire with a simple and inexpensive structure. [Structure] A wire side horn electrode is abutted against the lower end of a long insulator 7 at the base of a horn mount 9 having a wire side horn electrode 10 facing the horn electrode 16 of a lightning arrester 3. A locking projection 20 for preventing downward rotation of 10 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air discharge gap in a conductor suspension device equipped with a lightning arrester.

[0002]

[Prior art]

 For example, as shown in FIG. 1, the conventional device has a wire-side horn in which a wire-side horn electrode 10 is projectingly provided on a lower end of a long insulator 7 which is rotatably suspended at a tip of a steel tower arm 1. The upper end of the hook attachment 9 is rotatably attached by the first support shaft 8, and the upper end of the free center suspension clamp 12 is attached to the lower end of the wire side horn attachment 9 by the second support shaft 11. The conductor suspension device 2 is rotatably mounted, and the lightning arrester 3 is vertically installed on the tower arm 1 via a mounting adapter 15. The horn electrode 16 and the conductor are provided so as to project from the lower end of the lightning arrester 3. The wire-side horn electrode 10 of the suspension device 2 is opposed to the suspension device 2 with a predetermined air discharge gap G. However, as shown in FIGS. 6 and 7, a gap is formed between the upper end 52 of the base portion 51 of the wire side horn mount 9 and the lower end of the long insulator 7 so that the line side horn mount may be formed. 9 is rotatably attached to the long insulator 7.

[0003]

[Problems to be solved by the device]

 By the way, the moment of the electric wire vertical load (including the weight of the free center type suspension clamp) on the first support shaft 8 and the force of the line side horn electrode 10 on the first support shaft 8 are applied. In Fig. 1, the predetermined air discharge gap G is ensured in a balanced state. In Fig. 1, the vertical load of the wire is reduced due to the jumping of the wire due to a jump jump, etc. -When the ment overcomes the moment of the wire vertical load, the wire side horn electrode 10 rotates clockwise around the first support shaft 8 in the figure, so that the predetermined air discharge gap G can be maintained. There was the inconvenience of disappearing.

The present invention has been made in view of the above points, and provides a conductor suspension device including a lightning arrester, which has a simple and inexpensive structure and can maintain a predetermined air discharge gap irrespective of a change in vertical load of an electric wire. The purpose is to provide.

[0005]

[Means and Actions for Solving the Problems]

 In the conductor suspension device equipped with a lightning arrester according to the present invention, a wire side horn electrode 10 is projectingly provided on the lower end of a long insulator 7 rotatably suspended on a tower arm 1. The upper end of the hook attachment 9 is rotatably attached by the first support shaft 8, and the upper end of the suspension clamp 12 is rotatably attached by the second support shaft 11 to the lower end of the horn attachment 9. And the wire side horn electrode 10 below the horn electrode 16 and the predetermined air discharge gap G. With the lightning arrester 3 facing each other, a locking projection 20 for abutting the lower end of the long insulator 7 at the base of the horn mount 9 for preventing downward rotation of the wire side horn electrode 10. Is characterized in that it is installed.

In a normal state, the electric wire vertical load acting on the second support shaft 11 is much heavier than the weight of the wire side horn electrode 10, and therefore the electric wire vertical load on the first support shaft 8 is reduced. The length of the arm of the ment is significantly smaller than the length of the arm of the moment of the force by the line side horn electrode 10 with respect to the first support shaft 8, and the suspension clamp 12 is attached to the horn mount 9. The second support shaft 11 is slightly left of the long insulator axis line 19. Therefore, when the vertical load on the electric wire increases from the normal state, the second support shaft 11 further approaches the long shaft insulator axis 19 for moment balance, but its displacement is very small, so the air discharge is performed. No substantial change in the gap occurs. On the contrary, when the wire vertical load decreases from the normal state and the moment of force by the wire side horn electrode 10 overcomes the wire vertical load moment, the wire side horn electrode 10 becomes the first support. It tries to rotate in the direction away from the horn electrode 16 of the lightning arrester 3 about the shaft 8, but it does not rotate because the locking projection 20 of the horn mount 9 is in contact with the lower end of the long insulator 7. .

The above-described operation can be obtained even when the suspension insulator 21 is used instead of the long insulator 7.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a steel tower arm, 2 is a conductor suspension device, and 3 is a lightning arrester. The conductor suspension device 2 includes a suspension insulator fitting 7 fixed to the lower surface of the steel tower arm 1 and a long insulator 7 suspended from the suspension device attachment metal 4 via a U clevis 5 and a ground-side horn fixture 6. Attach the wire side horn mount 9 to the lower end of the with the first support shaft 8. A wire-side horn electrode 10 is provided with a wire-side horn electrode 10 projecting from one side of the wire-side horn fixture 9, and a free center type suspension clamp 12 is hung from the lower end of the wire-side horn electrode 10 by a second support shaft 11.

The lightning arrester 3 is hung from the free end of the mounting adapter 15 protruding in the same direction as the wire side horn electrode 10 from one side of the steel tower arm 1, and the horn electrode 16 of the lightning arrester 3 and the conductor suspension are provided. The wire-side horn electrode 10 of the device 2 is opposed to the device with a predetermined air discharge gap G.

The above configuration is the same as the conventional device. In the present embodiment, as shown in FIGS. 2 and 3, in the normal state in which the wire-side horn electrode mounting portion 18 of the wire-side horn fitting 9 directly intersects with the long insulator shaft axis 19, the wire-side hood is provided. The wire-side horn electrode is attached by projecting a locking projection 20 that abuts the lower end of the long insulator 7 at the upper end of the base 17 of the connector 9 where the wire-side horn electrode attachment portion 18 is not provided. The downward rotation of the portion 18 is prevented. When the suspension insulator 21 is used in place of the long-length insulator 7, as shown in FIGS. 4 and 5, the locking projections 20 of the wire side horn mount 22 have the suspension insulator 21 and the wire side horn. It contacts the lower surface of the intermediate connecting portion 24 of the parallel clevis 23 that connects with the mounting member 22.

In FIG. 1, the second support shaft 11 on which the free-center type suspension clamp 12 is attached to the wire-side horn attachment 9 has a normal wire vertical load acting on the free-center type suspension clamp 12. At that time, it is located slightly to the left of the long insulator axis 19. This is because the normal wire vertical load (including the weight of the free-center type suspension clamp), the wire side horn electrode 10 (the horn mounting part that protrudes to the side to mount the wire side horn electrode). The length of the arm of the moment of the wire vertical load with respect to the first support shaft 8 is much larger than the weight of This is because the force exerted by the electrode 10 is significantly smaller than the length of the arm.

[0012] Now, if the vertical load on the electric wire increases more than in the normal state, the second support shaft 11 moves closer to the shaft insulator axis line 19 from the state of Fig. 1 in order to take the moment balance position, but its displacement Since the amount is very small, there is no substantial change in the air discharge gap G. On the contrary, when the wire vertical load is smaller than in the normal state and the moment of the force by the wire side horn electrode 10 overcomes the wire vertical load moment, the wire side horn electrode 10 is shown in the figure. Although it tries to rotate in the counterclockwise direction, it does not rotate because the locking projection 20 of the wire side horn mount 9 is in contact with the lower end of the long insulator 7. Therefore, the predetermined air discharge gap can be maintained regardless of the fluctuation of the vertical load of the electric wire.

[0013]

[Effect of device]

 As described above, according to the present invention, the wire side horn electrode of the conductor suspension device abuts the lower end of the insulator via the locking protrusion of the wire side horn mount, and the line side horn electrode. Since the downward rotation of the wire is prevented, even if the wire vertical load acting on the suspension clamp is changed, the wire side horn electrode is not substantially displaced. Therefore, there is a merit that the predetermined air discharge gap can be maintained regardless of the fluctuation of the vertical load of the electric wire by the simple and inexpensive structure.

[Brief description of drawings]

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

FIG. 2 is an enlarged front view of the main part of the present invention.

FIG. 3 is a left side view of the same.

FIG. 4 is an enlarged front view of a main portion of another embodiment of the present invention with a partial cross section.

FIG. 5 is a left side view of the same.

FIG. 6 is an enlarged front view of the main part of the conventional device.

FIG. 7 is a left side view of the same.

[Explanation of sign]

 1 Steel Tower Arm 2 Conductor Suspension Device 3 Lightning Arrestor 7 Long Insulator 8 First Spindle 9 Horn Attachment 10 Wire Side Horn Electrode 11 Second Spindle 12 Suspended Clamp 15 Connecting Material 16 Horn Electrode 20 Locking protrusion 21 Suspended insulator

Claims (2)

[Scope of utility model registration request] 1. An upper end of a horn mount having a wire side horn electrode projecting from the lower end of a long insulator rotatably suspended on a steel tower arm is rotated by a first spindle. A conductor suspension device which is movably attached and whose upper end is rotatably attached to the lower end of the horn attachment by a second spindle.
In the horn mounting device, the horn electrode is provided with a lightning arrester, which is hung vertically via a connecting member and faces the line-side horn electrode below the horn electrode with a predetermined air discharge gap. 2. A conductor suspension device equipped with a lightning arrester, characterized in that a locking projection is provided on the base portion of the wire rod so as to abut against the lower end of the long insulator and prevent downward rotation of the wire side horn electrode. 2. A conductor suspension device provided with a lightning arrester according to claim 1, wherein a suspension insulator is used instead of the long stem insulator.