JPH0441720Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a spacer for power transmission and distribution that is installed between multi-phase electric wires or between an overhead ground wire and an electric wire to prevent contact between upper and lower wires. It is.

[Prior Art] Generally, in a power transmission line, as shown in Fig. 6, three-phase power transmission lines La are placed on both the left and right sides of a steel tower T.
They are installed at a predetermined interval in the middle and lower tiers. When such a power transmission line La encounters strong winds, or when snow and ice build up on the power transmission line La and cause three-jump or gear locking phenomena, the power line La is shaken greatly and the distance between the different phases becomes extremely small. In the worst case scenario, the electric wires La may come into contact and cause a short circuit between phases. When such a situation occurs, a power outage occurs, and the electric wire La carrying a large current is melted and damaged.

In order to prevent such a situation from occurring, conventionally, a spacer S made of an insulating material is interposed between each electric wire La to prevent the electric wires La from coming close to each other abnormally. In addition, in recent years, an overhead ground wire Lb used for communications etc. has been installed at the upper end of the steel tower T.
A spacer S made of an insulating material has come to be installed between the overhead ground wire Lb and the upper phase electric wire La as well.

The configuration of this spacer S is, for example, the seventh
Conventionally, the one for one conductor shown in the figure and the one for two conductors shown in FIG. 8 have been known. That is, in the one-conductor spacer shown in FIG. 7, the spacer main body 1 is constructed by connecting and fixing two pleated insulators 2 to each other at opposing ends by means of fixing fittings 3. Clamp fittings 5 and 6 are rotatably attached to brackets 4 at both upper and lower ends of the spacer body 1 by pins 7 extending in a direction perpendicular to the track direction.

In addition, in the two-conductor spacer shown in FIG. 8, a mounting bracket 8 is rotatably attached to a bracket 4 at both upper and lower ends of a spacer body 1 made of two pleated insulators 2 by a pin 9 extending in the track direction. A pair of brackets 10 are rotatably supported at both ends by pins 11 extending in the track direction. Each bracket 10 on the mounting bracket 8 includes
Clamp fittings 5 and 6 are rotatably attached by pins 7 extending in a direction perpendicular to the track direction.

In both the one-conductor spacer and the two-conductor spacer, the spacer body 1
is installed between the upper and lower wires to prevent the upper and lower wires from coming close to each other abnormally.

[Problems to be Solved by the Invention] According to the mounting configuration of the spacer S, the weight of the spacer S acts in a downward direction with respect to the upper and lower lines. However, in the spacer S of the conventional structure described above, the upper clamp fitting 5 has a bracket 4 on the upper end side of the spacer body 1.
10 is located below the upper lines La and Lb, the weight of the spacer S acts on the upper clamp fitting 5 in a downward direction, causing the upper clamp fitting 5 to tilt. There isn't.

On the other hand, regarding the lower clamp fitting 6,
Brackets 4, 10 on the lower end side of the spacer body 1
Since the pin 7 for connecting to is located above the underline La, the weight of the spacer S acts to press against the lower clamp fitting 6 from above, and as shown in FIG. 6 is in an inclined state, and the lower clamp fitting 6 is attached by the pin 7.
A large bending moment is applied to the connection between the brackets 4 and 10.

For this reason, in the conventional configuration, it was necessary to form the brackets 4, 10 on the lower end side of the spacer body 1 and the connecting part of the lower clamp metal fitting 6 strongly so as to withstand this bending moment, which resulted in an increase in the weight of the spacer S and a problem that the range of application of the spacer was extremely narrowed due to the strength of the electric wire La and overhead ground wire Lb to which the spacer S was attached.

This invention was made by paying attention to the problems that exist in the conventional technology, and its purpose is to prevent the spacer from acting even when its weight acts on the clamp fitting when the spacer is attached. It is an object of the present invention to provide a spacer for power transmission and distribution, in which no bending moment is applied to the connecting portion between a clamp fitting and a spacer body, and the spacer can be made lighter and its range of application can be expanded.

[Means for Solving the Problems] In order to achieve the above object, in the power transmission and distribution spacer of this invention, the power transmission and distribution spacer installed between multiple phase electric wires or between the overhead ground and the electric wire. , Clamp fittings are provided at both the upper and lower ends of the spacer body to clamp the upper and lower lines.
The upper clamp fitting is rotatably connected to the spacer body below the upper line, and the lower clamp fitting is rotatably connected to the spacer body below the underline.

[Function] When the power transmission and distribution spacer configured as described above is installed, the weight of the spacer acts in a downward direction on both the upper and lower clamp fittings, so there is no inclination in either the upper or lower clamp fittings. . Therefore, it is possible to reliably prevent a bending moment from being applied to the connecting portion between the clamp fitting and the spacer body.

[Embodiments] Hereinafter, a first embodiment of a spacer for power transmission and distribution according to the present invention will be described in detail with reference to FIG.

Now, this embodiment is a spacer for one conductor, and in almost the same way as the conventional structure shown in FIG. 3, they are connected and fixed to each other. An upper clamp fitting 5 is rotatably attached to the bracket 4 at the upper end of the spacer body 1 by a pin 7 extending below the upper lines La and lb in a direction perpendicular to the track direction. The upper end of the spacer body 1 is clamped in a suspended state relative to the upper lines La and Lb.

On the other hand, in this embodiment, a channel-shaped adapter 12 is fixed to the lower end of the spacer body 1, and a bracket 13 is provided protruding from the upper surface of the bottom. A lower clamp fitting 6 is rotatably attached to the bracket 13 by a pin 7 extending below the underline La in a direction perpendicular to the track direction. is clamped in a suspended state with respect to the underline La.

Therefore, according to the spacer of this embodiment, between multiple phase power transmission lines La or between overhead ground wire Lb and power transmission line La
In the state where it is mounted between the spacer and the spacer, the weight of the spacer acts in a downward direction on both the upper and lower clamp fittings 5 and 6. Therefore, the upper and lower clamp fittings 5 and 6 do not tilt due to the pressing force as in the conventional structure shown in FIG. It is possible to reliably prevent a bending moment from being applied to the connecting portions with the clamp fittings 5 and 6. As a result, the weight of the spacer can be reduced, and the strength of the power transmission line La and overhead ground wire Lb can be reduced.
The range of application is not limited by the weight limit of the spacer, and it can be used over a wide range of applications.

[Another Embodiment] Next, another embodiment of this invention will be described based on FIGS. 2 to 4.

First, the second embodiment shown in FIG. 2 is a spacer for two conductors, and has a spacer main body 1 made up of two pleated insulators 2, almost the same as the conventional structure shown in FIG. Upper end bracket 4
A mounting bracket 8 is rotatably attached by a pin 9 extending in the direction of the track, and a pair of brackets 10 are rotatably supported at both ends thereof by pins 11 extending in the direction of the track. Each bracket 10 on the mounting bracket 8 has an upper clamp bracket 5 attached to the upper line La,
It is rotatably attached below Lb by a pin 7 extending in a direction perpendicular to the line direction, and the upper end of the spacer body 1 is clamped in a suspended state with respect to the upper lines L and Lb via the upper clamp fitting 5. .

On the other hand, in this embodiment, a mounting bracket 8 is also rotatably attached to the bracket 4 at the lower end of the spacer main body 1 by a pin 9 extending in the track direction, and a pair of brackets 10 are attached to both ends of the bracket 4 in an upside-down manner. In this state, it is rotatably supported by a pin 11 extending in the direction of the track. A lower clamp fitting 6 is rotatably attached to the upper end of each bracket 10 by a pin 7 extending below the underline La in a direction perpendicular to the track direction.
The lower end of the spacer main body 1 is clamped in a suspended state with respect to the underline La.

Therefore, in the spacer of this embodiment as well, the weight of the spacer in the attached state acts in a downward direction on both the upper and lower clamp fittings 5 and 6, and the bracket 10 and the clamp fittings 5 and 6 at both upper and lower ends of the spacer body 1 are It is possible to reliably prevent the possibility that a bending moment will be applied to the connection portion with the spacer, and the weight of the spacer can be reduced.

Note that the pin 9 may be located below the pin 11 as shown in FIG.

Next, the third embodiment shown in FIG. 4 is a spacer for one conductor, and in this embodiment, the bracket 13 is cantilevered at the upper end of one side and attached to the lower end of the spacer body 1. A bracket 13 for attaching the lower clamp fitting 6 is formed protruding from the upper part of the other side.

Furthermore, the fourth embodiment shown in FIG. 5 is a spacer for four conductors, and in this embodiment, the bracket 4 at both upper and lower ends of the spacer body 1 has four mounting portions 8a. A mounting bracket 8 is rotatably attached by a pin 9, and upper and lower clamp fittings 5 and 6 are attached to each mounting portion 8a via a bracket 10 in the same manner as in the second embodiment shown in FIG. It is being

Therefore, in the third and fourth embodiments, similarly to the first and second embodiments described above,
It is ensured that the weight of the mounted spacer acts in a downward direction on both the upper and lower clamp fittings 5 and 6, and bending moment is applied to the connection portion between the brackets and the clamp fittings 5 and 6 at both upper and lower ends of the spacer body 1. This allows the spacer to be made lighter.

Note that this invention is not limited to the configuration of the above embodiment; for example, instead of the configuration of 1 conductor, 2 conductors, and 4 conductors of the above embodiment, it may be applicable to 3 conductors or 5 or more multiconductors. It is also possible to make specific changes to the configuration of each part as desired without departing from the spirit of the invention.

[Effects of the invention] Since this invention is configured as explained above, when the spacer is attached, the weight of the spacer acts in a downward direction on both the upper and lower clamp fittings, causing the clamp fittings and the spacer body to It is possible to reliably prevent the possibility that a bending moment will be applied to the connection portion with the spacer, and this has the excellent effect of reducing the weight of the spacer and expanding the range of application.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a first embodiment of a spacer for power transmission and distribution embodying this idea, Fig. 2 is a front view showing a second embodiment of a spacer for power transmission and distribution, and Fig. 3 is a front view of a second embodiment of a spacer for power transmission and distribution. FIG. 4 is a partial front view showing another example of the same, FIG. 5 is a partial front view showing the fourth example, and FIG. 6 is a partial front view showing a spacer attached to a normal power transmission line. Front view showing the condition, No. 7
8 and 8 are front views showing different configurations of a conventional power transmission/distribution spacer, and FIG. 9 is a partial front view showing an enlarged inclined state of the lower clamp fitting. 1...Spacer body, 5...Upper clamp fitting,
6...Lower clamp fitting, 7...Pin, La...Power line, Lb...Overhead ground wire.

Claims (1)

[Scope of utility model claims] Between multiple phase wires La or overhead ground wire Lb and wire La
In the power transmission and distribution spacer installed between
Clamp fittings 5 and 6 for clamping the upper and lower lines are provided at both upper and lower ends of the spacer body 1, and the upper clamp fittings 5 are placed below the upper line on the spacer body 1.
It is rotatably connected to the lower clamp fitting 6.
A spacer for power transmission and distribution, characterized in that the spacer is rotatably connected to the spacer main body 1 below the underline.