JPH0638324B2 - Vertical array tension insulator device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a vertically arranged tensile insulator device in which a plurality of insulators are arranged in a double row in the vertical direction.

(Prior Art) When the tension of the power transmission line to be supported by the tensile strength insulator device is large, 2 to 2 are provided between the yoke on the ground side and the yoke on the line side.
A double-strand tension insulator device in which three rows of insulators are arranged in parallel is used. In this case, usually a horizontal array tension insulator device in which double-row insulators are arranged in parallel in a horizontal plane is used, but in cold snowfall areas, a large amount of snow is generated and the metal fittings of the insulator device are deformed, There is a possibility that the withstand voltage characteristic will be deteriorated. Therefore, recently, a vertically arranged tension insulator device in which multiple rows of insulators are arranged vertically in parallel in a vertical plane has been developed, and a device for preventing a large amount of snowfall by reducing the horizontal projected area of the insulator device has been made. There is.

However, when such a vertically aligned porcelain insulator device is contaminated due to salt damage or is discharged by lightning, the main arc horn (5) attached to the lower insulator (4) as shown in FIG. The direction of the main arc horn (5) is directed from the tip of the main arc horn (5), that is, an arc of several thousand degrees Celsius ejected vertically upwards directly hits the upper insulator (3), and the upper insulator (3) is deflected by heat. It was found to be damaged. Also, when the main arc horn (5) of the lower insulator (4) is omitted, the arc ejected vertically upward from the tip of the auxiliary arc horn (7) of the lower insulator (4) as shown in FIG. There was a risk that the insulator (3) in the upper stage would be eccentrically destroyed due to the force of.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and eliminates the risk of deformation of the insulator metal fittings and deterioration of withstand voltage characteristics due to snow cover, and further, a dirty arc or a lightning arc. The present invention has been completed for the purpose of a vertical array tension-resistant insulator device in which there is no fear of damage to the insulator even when the above-mentioned problem occurs.

(Means for Solving Problems) The present invention, which was made to solve the above problems, relates to a vertically arranged tension insulator device in which multiple rows of insulators are arranged in parallel in the vertical direction. The arc horn and the auxiliary arc horn surrounding the insulator are installed, and the lower insulator is bent outward in the axial direction of the insulator so that the normal line at the tip faces the arm of the auxiliary arc horn of the upper insulator. The auxiliary arc horn is attached, and the distance between the tip of the auxiliary arc horn and the arm is smaller than the insulation distance between the auxiliary arc horns installed on both sides of the lower insulator. It is a thing.

(Example) Next, the present invention will be described in more detail with reference to the illustrated example.

FIG. 1 is a diagram showing the entire longitudinally arranged tension insulator device using a long insulator, (1) is a ground side double yoke, (2) is a line side double yoke, (3) , (3) are these two yokes
Upper insulators placed between (1) and (2), and (4) and (4) are lower insulators. In this embodiment, each of these insulators (3) and (4) is formed by connecting two long insulators in series.
The types of (3) and (4) and the numbers connected in series are not limited to these. However, the upper insulators (3), (3) and the lower insulators (4), (4) are vertically arranged in a vertical plane to form a vertically arranged tensile insulator device having a small horizontal projection area.

In the present invention, the main arc horn extending in the opposite direction to the upper insulator (3) of these upper and lower insulators.
(5), (5) and auxiliary arc horns (6), (6) surrounding the periphery of the insulator (3) are attached, but the lower insulator (4)
There is no main arc horn, and only the auxiliary arc horn (7) is attached. Main arc horn (5) of the upper insulator (3)
Is a normal type provided so as to face above the central axis of the auxiliary arc horn (6), and the upper part of the ring part (6a) of the auxiliary arc horn (6a) is notched over a range of about 90 °,
This ring part (6a) is an arm part that extends diagonally from its lower end.
It is of the normal type supported in (6b). However, in the lower auxiliary arc horn (7), the normals at the tips (8) and (8) formed on the upper part of the ring-shaped body that surrounds the outer circumference of the insulator (4) are the same as the upper insulator (3). Mounted Auxiliary Arc Horn (6)
It is bent outward in the axial direction of the insulator (3) so as to face the arm portion (6b).

That is, in this embodiment, the auxiliary arc horn (7) is the second
As shown in the enlarged view of the figure, the tip (8) of the insulator (3) is bent about 30 ° outward in the axial direction, and the normal line at the tips (8) and (8) is changed to the auxiliary arc horn (6). ), The auxiliary arc horn (7) is fixed around the lower insulator (4) by a band metal fitting (7a). Further, the distance between the tip (8) of the auxiliary arc horn (7) and the arm (6b) of the auxiliary arc horn (6) attached to the upper insulator (3) is set on both sides of the lower insulator (4). It is smaller than the insulation distance between the auxiliary arc horns (7) and (7) attached to the. This is the tip (8) of the auxiliary arc horn (7).
The arc jet ejected in a direction normal to the tip portion (8) (in the embodiment, a direction inclined by about 30 ° in the axial direction) with certainty, surely causes the auxiliary arc horn of the upper insulator (3) ( 6)
This is for the purpose of being captured by the arm portion (6b) of the.

In FIG. 1, (9) is a jumper wire reinforcing metal fitting attached to the metal fitting (10), and (11) is a jumper wire attached to the jumper wire reinforcing metal fitting (9) by a clamp (12).

(Operation) The one configured in this way is mainly used to support a transmission line with a large tension in a cold snowfall area, but the upper insulator (3) and the lower insulator (4) are used.
Since and are arranged side by side in the vertical direction, the horizontal projected area is much smaller than that of the conventional horizontal array insulator device, and the amount of snow covered during snowfall can be greatly reduced.

Also, when the lower insulator (4) is contaminated by salt damage or the like to generate a creeping arc or a lightning arc due to a lightning strike, these arcs are immediately generated by the auxiliary arc horn (7) of the lower insulator (4). ) And arc discharge is performed from the tip (8) in the normal direction. However, in the present invention, the tip portion (8) of the auxiliary arc horn (7), the normal line at (8) is the auxiliary arc horn (6) of the upper insulator (3), the arm portion (6b) of (6). The insulator (3) is bent outward in the axial direction, and the distance between the tip (8) of the auxiliary arc horn (7) and the arm (6b) is set to the lower insulator (4). ) It is smaller than the insulation distance between the auxiliary arc horns (7) and (7) mounted on both sides. Therefore, in the present invention, as shown in FIG. 3, the tip portion (8) of the auxiliary arc horn (7) is
The arc discharged from the arc is ejected with directivity in the normal direction, and is ejected in the direction of the arm part (6b) of the auxiliary arc horn (6) while avoiding the upper insulator (3).
It is possible to prevent (3) from being damaged by the high temperature arc ejected from the auxiliary arc horn (7) of the lower insulator (4).

As shown in FIG. 3, the auxiliary arc horn (7) of the lower insulator (4) has directivity in the normal direction from the tips (8) and (8) toward the arm (6b). The ejected arc was reliably captured by the arm part (6b) of the auxiliary arc horn (6) attached to the upper insulator (3) vertically above it and transferred to the auxiliary arc horn (6). Transition to the main arc horn (5) through the arc horn (6), the main arc horn (5),
Discharge is performed during (5). Such arc transfer is smoothly performed due to the nature of the arc that tends to jet with a directivity in the normal direction of the tip of the arc horn and the nature of the arc that attempts to move upwards. 3) and (4) are effectively protected.

As described above, according to the present invention, the arc can be smoothly transferred to the main arc horn (5) of the upper insulator (3) without damaging the upper insulator (3).

(Effects of the invention) As is apparent from the above description, the present invention reduces the horizontal projected area of the insulator device by arranging the double-row insulators in the vertical direction, and the deformation of the insulator fittings due to the snowfall during snowfall. In addition to preventing the withstand voltage characteristics from decreasing, the normal line at the tip of the auxiliary arc horn of the lower insulator is made to face the arm of the auxiliary arc horn of the upper insulator and bent outward in the axial direction of the insulator. By setting the distance between the tip of the auxiliary arc horn and the arm above to be smaller than the insulation distance between the auxiliary arc horns installed on both sides of the lower insulator, the upper insulator can be used even when it is damaged or lightning strikes. It has succeeded in effectively preventing damage due to an arc ejected in the normal direction from the auxiliary arc horn of the insulator. Therefore, the present invention contributes greatly to the industrial development as a vertically arranged tension insulator device suitable for use in a power transmission line especially in cold snowfall areas.

[Brief description of drawings]

1 is a front view showing an embodiment of the present invention, FIG. 2 is an enlarged perspective view of a lower auxiliary arc horn, FIG. 3 is a front view showing an arc transition state in the present invention, and FIG. 4 is a conventional example. FIG. 5 is a front view showing the arc transition state in FIG. 5, and FIG. 5 is a front view showing the arc transition state in another conventional example. (3): upper insulator, (4): lower insulator, (5): main arc horn, (6): upper insulator auxiliary arc horn, (6b): auxiliary arc horn arm, (7) : Auxiliary arc horn of lower insulator, (8): Tip of auxiliary arc horn.

Claims (1)

[Claims] 1. In a vertically arranged tension insulator device in which multiple rows of insulators are arranged in parallel in a vertical direction, main arc horns (5), (5) and insulators (3) are provided in upper insulators (3), (3). ), (3) and surrounding auxiliary arc horns (6), (6) and the lower insulator
In (4) and (4), the insulators with the normals at the tips (8) and (8) in the upper stage
Attach the auxiliary arc horn (6) of (3) and the auxiliary arc horn (7) bent outward in the axial direction of the insulator (3) so as to face the arm portion (6b) of (6), and Arc horn
The distance between the tip portion (8) of (7) and the arm portion (6b) is set to the auxiliary arc horns (7) attached to both sides of the lower insulator (4),
(7) A vertically arranged tension insulator device characterized by being made smaller than the insulation distance between them.