JPH0614331Y2 - Bird damage prevention device for double tension insulator device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a bird damage prevention device for a two-strand-strength insulator device in which two insulators are attached to both ends of a yoke to support a transmission line or the like. .

[Prior Art] A pair of arc horns are attached to the metal fittings on the line side and the metal fittings on the ground side of the insulator device so that they face each other at the time of a lightning stroke to prevent the damage to the insulators. It has been devised so that it is usual to attach an arc horn to the center of each yoke in a two-strand tensile insulator device using a suspension insulator.

However, when a large bird stops at the insulator device and opens its wings, there is no end to bird damage accidents in which the arc horns are entangled with birds as the medium, and the spread of computers and the like can cause a power failure accident. It is an important issue in modern society. For this reason, various bird damage prevention tools have been devised that cover the arc horn with a protective cover or the like to prevent contact with birds, but such an insulating cover is formed in a complicated shape that matches the shape of the arc horn. Therefore, the material is made of a resin material such as vinyl chloride, which is easy to mold. Therefore, its life is 3 to 5 because it has poor weather resistance and deteriorates during use or its insulating property decreases. It was about a year.

In order to solve this problem, conventionally, as shown in FIG.
A small insulator 4 is attached to one or both of the center lines of the yoke 2 supporting the series of insulators 1, and a pair of small gap horns 5 and 6 are provided at both ends of the small insulator 4 so as to project in the center axis direction. Main horns 7 and 7 are attached to the tip portion of 4 and the other yoke 2, and an arc fixing horn 10 that projects obliquely upward from the lower side of the lower small gap horn 6 is attached to the base end portion of the small insulator 4. A bird damage prevention device equipped with is proposed.

However, in this conventional example, the small gap horn 6 on the lower side and the arc fixing horn 10 are separately formed, and the small insulator 4 is directly fixed to the yoke 2, so that the arc fixing horn 10 is formed on the insulator 2. Pointing towards the outer periphery of the
When the arc is polluted by the arc fixing horn 10 when the insulation strength is reduced and an arc is generated on the creeping surface, the tip of the arc fixing horn 10 is within the diameter of the insulator. The arc thus formed damages the surface of the insulator 2, which causes a problem that the insulator is cracked.

[Problems to be Solved by the Invention] This invention solves the above-mentioned conventional problems to reduce bird damage, and when flashover occurs,
It is an object of the present invention to provide a bird damage prevention device for a double-strength insulator device capable of suppressing damage to the surface of the insulator and improving the durability of the insulator.

[Means for Solving the Problems] This invention attaches a small insulator via a support rod to one or both of the centerlines of a yoke supporting the insulator, and a pair of small gap horns are provided at both ends of the small insulator. In addition to projecting in the line direction, a main horn is attached to the tip of the small insulator, and further, the tip of the lower small gap horn is projected outward from the insulator diameter, and is projected obliquely upward from the lower side. The means to combine the functions of the fixed horn is used.

[Operation] In this invention, the small insulator is lifted by the support rod, the tip of the lower small gap horn is projected to the outside of the insulator diameter, and the lower small gap horn also serves as the arc fixing horn. When a flashover occurs in the lower small gap horn due to lightning or the like, the arc can be quickly transferred from the surface of the insulator to the main horn, so that the damage of the insulator due to the arc is suppressed.

Also, when a large bird comes in contact with the main horn,
An air insulation gap between the small gap horns prevents a ground fault.

[Embodiment] Next, an embodiment embodying the present invention will be described with reference to FIGS.

In FIGS. 1 and 2, reference numerals 1 and 1 denote insulators that form two suspension insulator series, and reference numerals 2 and 2 denote yokes that support these suspension insulator parallels. A support rod 3 is erected on the center line of one or both of the yokes 2, and a small insulator 4 is attached to the upper end portion of the support rod 3 so as to project vertically upward with respect to the axis of the suspension insulator series.

The small insulator 4 is provided with a pair of small gap horns 5 and 6 extending in the center line direction of the yoke 2 at the upper and lower ends thereof, and a main horn 7 at the upper end thereof. This main horn 7
Is provided so as to face the main horn 7 protruding from the other yoke 2, and the sum of the gap between the main horns 7 and 7 and the gap between the small gap horns 5 and 6 is the coordinated insulation distance of the transmission line. The gap L between the small gap horns 5 and 6 is large enough to withstand the ground voltage when the main horns 7 and 7 are conducted by a conductor such as a bird.

Specifically, when the transmission voltage is 33 KV, the ground voltage is 2
It is 0 KV, and the required insulation interval for this is sufficient if it is 40 mm or more in consideration of adhesion of water droplets. Therefore, when the small insulator 4 is attached to one yoke 2, the interval L between the small gap horns 5 and 6 is If the small insulators 4 are attached to both yokes 2 (not shown), they may be set to 40 mm or more and 20 mm or more, respectively.

Further, the small gap horn 6 on the lower side is formed in a round bar shape, for example, a circular cross section so as to project obliquely upward from the cap diameter of the insulator 1 along the center line, and when the insulator 1 is soiled, its creeping surface It also serves as an arc fixing horn for promptly inducing an arc generated in the arc and preventing the arc jet from moving away from the insulator 1. Further, when the small gap horn 6 is formed in the shape of a round bar, the starting point of the arc is more stable than in the case where it is formed in the shape of a flat plate, so the directivity of the arc is improved. The projecting distance of the small gap horn 6 is preferably about 35 mm.

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

At the time of a lightning strike, arc discharge is performed between the main horns 7 and 7 and between the small gap horns 5 and 6 so that the insulator 1
Can be prevented from being damaged.

Further, in the above-mentioned embodiment, the small insulator 4 is lifted by the support rod 3, the tip of the lower small gap horn is projected outward from the insulator diameter, and its cross-sectional shape is rod-shaped, and the small gap horn 6 has an arc fixing horn. Since it is also used as
The tip of the small gap horn 6 can be displaced from the insulator 1. Therefore, even when an arc is generated on the creeping surface of the insulator 1 due to contamination or the like, the arc is picked up by the small gap horn 6, and the tip is directed obliquely upward. By injecting, the arc jet can be quickly avoided from the insulator 1 to prevent the insulator from being damaged.

On the other hand, even when a large bird opens its wings and entangles between the main horns 7 and 7, small gap horns 5 and 6 are provided in series with the insulation gap to withstand the ground voltage. There is no risk of a short circuit unless the gap horns are connected at the same time.

The present invention can be embodied as follows.

As shown in FIG. 5, the support rod 3 should be formed in a straight line and applied to a standard type two-strand insulator device.

[Advantages of the Invention] As described in detail above, the present invention can reduce short-circuit accidents caused by birds in the double-strand-insulator device, and also when an arc is generated on the surface of the insulator due to contamination or the like. This has the effect that the small gap horn, which also serves as the arc fixing horn, is rapidly transferred to the main horn to prevent the insulator from being burnt out and to improve its durability.

[Brief description of drawings]

FIG. 1 is a front view showing the entire two-strength tensile insulator device of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a front view of a main portion, FIG. 4 is a right side view of FIG. FIG. 5 is a front view of a main portion showing another example of the present invention, and FIG. 6 is a front view showing a conventional tension insulator device. 1 ... Insulator, 2 ... Yoke, 3 ... Support rod, 4 ...
Small insulator, 5 ... Small gap horn, 6 ... Small gap horn that doubles as arc fixing horn, 7 ... Main horn.

Claims (1)

[Scope of utility model registration request] 1. A small insulator (4) is attached via a support rod (3) to one or both of the center lines of a yoke (2) supporting the insulator (1, 1), and the small insulator (4) is attached. A pair of small gap horns (5, 6) are projectingly provided at both ends of the center line direction, and a main horn (7) is attached to a tip end portion of the small insulator (4). ) The tip is made to project outward from the cap diameter of the insulator (1, 1), and the small gap horn (6) at the lower side is made to project obliquely upward from the lower side so as to also serve as an arc fixing horn. A bird damage prevention device for double-strength insulator devices.