JPH058757Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a clamping device for a spacer for power transmission and distribution, which is attached to a multi-phase power transmission line or power distribution line to prevent short circuits between phases.

[Prior Art] Generally, in a power transmission line, three-phase power transmission lines La, Lb,
Lc are installed at predetermined intervals in the upper, middle, and lower stages. When such transmission lines La to Lc encounter strong winds, or when snow and ice build up on transmission lines La to Lc and cause three-jump or gear locking phenomena, the lines La to Lc are greatly shaken and the different phases The distance between them becomes extremely small, and in the worst case scenario, the wires La to Lc come into contact, causing a short circuit between phases. When such a situation occurs, a power outage occurs, and because the current is large, the electric wires La~Lc
Melting loss occurs. In order to prevent such a situation from occurring, a spacer S made of an insulating material is interposed between each of the electric wires La to Lc to prevent the electric wires La to Lc from approaching each other abnormally.

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 body 1 is constructed by connecting and fixing two insulators 2 with shields to each other at opposing ends by means of fixing fittings 3. Clamp fittings 5 are rotatably attached to brackets 4 at both upper and lower ends of the spacer body 1 by pins 6 extending in a direction perpendicular to the track direction.

In addition, in the two-conductor spacer shown in FIG.
A mounting bracket 7 is rotatably attached to the brackets 4 at both upper and lower ends of the bracket 4 by pins 8 extending in the direction of the track, and a pair of brackets 9 are rotatably supported at both ends by pins 10 extending in the direction of the track. . A clamp fitting 5 is rotatably attached to each bracket 9 on the mounting fitting 7 by a pin 6 extending in a direction perpendicular to the track direction.

In both the one-conductor spacer and the two-conductor spacer, the spacer main body 1 is attached between the upper and lower lines by clamping the clamp fittings 5 to the vertically adjacent power transmission lines La to Lc, respectively. , abnormal approach of the upper and lower lines is prevented.

[Problems to be Solved by the Invention] In recent years, this type of spacer for power transmission and distribution has been considered to be applied to ultra-high voltage applications with phase-to-phase distances of up to 10 m, and the increase in wire tension caused by the installation of spacers has become a problem. In order to reduce the weight of the spacer, a lighter spacer is required. In addition, this type of power transmission/distribution spacer is used to prevent phase-to-phase short circuit accidents caused by the bounce and vibration of electric wires caused by ice and snow or strong winds, as described above, but it is also used to improve the reliability of power transmission lines. , the scope of its application is rapidly expanding, and there is a strong desire to simplify the installation work to electric wires in conjunction with weight reduction.

However, in the above-mentioned conventional spacer for power transmission and distribution, clamp fittings 5 are provided at both the upper and lower ends of the spacer body 1, and the clamp fittings 5 allow the spacer body 1 to be attached to the upper phase as shown in FIG. Since the clamp fittings 5 were installed at different positions between the middle-phase wires La and Lb and between the middle-phase and lower-phase wires Lb and Lc, the clamp fittings 5 were placed overlappingly on the middle-phase wire Lb, resulting in a large weight. As it becomes,
There was a problem in that the installation work of the spacer was also very troublesome.

This invention was made by focusing on the problems that exist in the conventional technology, and its purpose is to reduce the number of parts of the spacer and reduce its weight. It is an object of the present invention to provide a clamping device for a spacer for power transmission and distribution, which can simplify the installation work of a spacer on an electric line.

[Means for Solving the Problems] In order to achieve the above object, the power transmission and distribution spacer clamp device of this invention uses a power transmission and distribution spacer that is attached to multiple phase power lines to prevent phase-to-phase short circuits. In the clamping device, a clamp part that clamps a middle-phase electric wire, a first connecting part that rotatably connects a lower end of a spacer body interposed between the upper-phase and middle-phase electric wires, and a lower-phase and a second connecting portion rotatably connecting the upper end portion of the spacer main body interposed between the electric wires of the spacer and the intermediate phase.

[Function] According to the power transmission/distribution spacer clamp device configured as described above, a three-phase integrated spacer is constructed by integrally connecting the spacer body between the upper and middle phases and the spacer body between the middle and lower phases. This makes it possible to reduce the weight of the spacer, and to install the spacer onto the electric line at the same time without having to do it separately for each phase.

[Example] Hereinafter, an example of a spacer for power transmission and distribution equipped with a clamp device embodying this invention will be described in detail based on FIGS. 1 to 4.

Now, this embodiment is a spacer for one conductor, and the upper phase and middle phase electric wires La, Lb
A spacer main body 1A interposed between the spacer main body 1A and a spacer main body 1B interposed between the middle phase and lower phase electric wires Lb and Lc.
are connected to each other by a clamping device 11 at opposite ends. Each of the spacer bodies 1A, 1B is constructed by connecting and fixing two insulators 2 each having a shade to each other by means of fixing fittings 3 at opposing ends, similarly to the conventional structure described above.

Clamp fittings 5 are rotatably attached to the brackets 4 at the upper end of the upper spacer main body 1A and the lower end of the lower spacer main body 1B by pins 6 extending in a direction perpendicular to the track direction. The upper end portion of the upper spacer main body 1A is clamped to the upper phase electric wire La via this clamp fitting 5, and the lower end portion of the lower spacer main body 1B is clamped to the lower phase electric wire Lc.

As shown in FIGS. 2 and 3, the clamp device 11 includes a clamp fitting 12 as a clamp part for clamping the middle phase electric wire Lb, and a clamp fitting 12 for connecting the upper and lower spacer bodies 1A and 1B. It is composed of a connecting fitting 13. The clamp fitting 12 is provided with a support part 14 for inserting and supporting the medium-phase electric wire Lb, and a pair of connecting pieces 1 are provided on both sides of the support part 14.
5 and a pair of bolt insertion holes 16 are formed. The support portion 1 of this clamp fitting 12
4, with the middle phase electric wire Lb inserted and supported, and the clamping body 17 fitted on the upper part of the electric wire Lb,
By inserting a pair of U-shaped bolts 18 into the bolt insertion holes 16 and fixing them with nuts 19, the clamp fitting 12 is attached to the middle-phase electric wire Lb.

The connecting fitting 13 is provided with a pair of first connecting pieces 20 as first connecting parts for connecting the upper spacer main body 1A, and a second connecting piece 20 for connecting the lower spacer main body 1B is provided at the lower part thereof. A second connecting piece 21 as a part is provided in a protruding manner. Then, the clamp fitting 12 is connected to the first connecting piece 20 of the connecting fitting 13.
With the first connecting piece 20 of the connecting fitting 13, the connecting piece 15 of the clamp fitting 12, and the bracket 4 at the lower end of the upper spacer main body 1A, the pin 2 is attached to the bracket 4 at the lower end of the upper spacer body 1A.
2, the clamp device 11 is rotatably connected to the lower end of the upper spacer main body 1A about an axis extending in a direction perpendicular to the track direction. In addition, the second connecting piece 21 of the connecting fitting 13
By inserting a pin 23 into the bracket 4 at the upper end of the lower spacer body 1B, the clamp device 11 is rotatably connected to the upper end of the lower spacer body 1B around an axis extending in the track direction.

Now, in the power transmission and distribution spacer of this embodiment, the upper spacer main body 1A between the upper and middle phases and the lower spacer main body 1B between the middle and lower phases are integrally connected via the clamp device 11 to form a three-phase integrated structure. Because of this structure, compared to the conventional separate structure shown in FIGS. 6 and 7, the clamp structure for the middle phase electric wire Lb is simplified, and the weight of the entire spacer can be reduced. . In addition, when installing spacers to electric lines, there is no need to perform the troublesome work of separately installing spacers between each phase, as in the conventional configuration shown in Figure 6, and clamping metal fittings at the upper and lower ends 5 to the upper phase and lower phase electric wires La, Lc, and clamp the clamp fitting 12 of the intermediate clamping device 11 to the middle phase electric wire.
By clamping to Lb, the three-phase integrated spacer can be easily and quickly attached to the three-phase electric line.

Furthermore, when the spacer is attached to the power line, due to weather conditions such as ice and snow or strong winds, the spacer body 1 between the two phases may be damaged as shown in FIG.
A and 1B may undergo bending and stretching movements centering on the intermediate phase clamp portion. In this case, in the conventional configuration shown in FIGS. 6 and 7, the portion of the clamp fitting 5 on the middle phase side of the pair of spacers S, which are attached at different positions, becomes the bending point and is therefore not used as the clamp gripping portion. There was a risk that the aluminum alloy Armarod would wear out. On the other hand, in the embodiment, the connecting pin 23 between the clamp fitting 12 of the clamp device 11 and the lower spacer body 1B is
Since this is the bending/stretching point, there is no risk of wear of the Armarod, and by using a steel material such as high-tensile steel as the connecting pin 23, it is possible to prevent wear.

[Another Embodiment] Next, another embodiment of this invention will be explained based on FIG. 5. This embodiment is a spacer for two conductors. Electrical wire
A spacer main body 1A interposed between La and Lb and a spacer main body 1B interposed between middle-phase and lower-phase electric wires Lb and Lc are connected to the clamping device 1 at opposing ends.
1 are connected to each other.

Further, a mounting bracket 7 is rotatably attached to the brackets 4 at the upper end of the upper spacer body 1A and the lower end of the lower spacer body 1B by pins 8 extending in the track direction, and a pair of brackets 9 are provided on both sides of the brackets 4. It is rotatably supported by a pin 10 extending in the track direction. A clamp fitting 5 is rotatably attached to each bracket 9 on the mounting fitting 7 by a pin 6 extending in a direction perpendicular to the track direction. Then, via this clamp fitting 5,
The upper end of the upper spacer body 1A is clamped to the upper phase electric wire La, and the lower end of the lower spacer body 1B is clamped to the lower phase electric wire Lc.

The clamp device 11 is provided with a mounting fitting 24, and first and second connecting portions 25, 26 are provided at both upper and lower ends thereof. The bracket 4 at the lower end of the upper spacer main body 1A is rotatably connected to the first connecting part 25 by a pin 27 extending in the track direction, and the upper end of the lower spacer main body 1B is connected to the second connecting part 26. The brackets 4 are rotatably connected by a pin 28 extending in the track direction. A pair of brackets 29 are rotatably supported on both sides of the mounting bracket 24 by pins 30 extending in the track direction, and each bracket 29 has a clamp member 31 as a clamp portion with a pin 32 extending in a direction perpendicular to the track direction. It is rotatably attached. Then, the clamp device 11 is clamped to the middle phase electric wire Lb via this clamp fitting 31.

Therefore, in this embodiment as well, the upper spacer body 1A between the upper and middle phases and the lower spacer body 1A between the middle and lower phases.
B are integrally connected via the clamping device 11 to form a three-phase integrated structure, so the clamping structure for the middle phase electric wire Lb is simplified.
The weight of the entire spacer can be reduced. In addition, when installing spacers to electric lines, there is no need to perform the troublesome work of separately installing spacers between each phase. By clamping to the phase and lower phase electric wires La, Lb, and Lc, the three-phase integrated spacer can be easily and quickly attached to the three-phase electric line.

Note that this invention is not limited to the configuration of the above embodiment, and for example, anti-vibration suspension (AGS) may be used as the clamp fittings 12, 31 of the clamp device 11.
It is also possible to change the structure of each part arbitrarily and embody it without departing from the spirit of the invention, such as by using a clamp.

[Effect of the invention] Since this invention is configured as explained above, it is possible to construct a three-phase integrated spacer in which the spacer body between the upper and middle phases and the spacer body between the middle and lower phases are integrally connected. This makes it possible to reduce the number of parts of the spacer and reduce its weight.In addition, the spacer installation work can be done at the same time between each phase without having to do it separately between each phase, which simplifies the installation work. It has an excellent effect of being able to achieve the desired results.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a spacer for power transmission and distribution equipped with a clamping device embodying this invention, FIG. 2 is a partial side view showing an enlarged view of the spacer for power transmission and distribution shown in FIG. 1, and FIG. The figure is an exploded perspective view showing a further enlarged view of the clamp device, FIG. 4 is a diagram illustrating the bending and stretching movement of the spacer, FIG. 5 is a side view showing another embodiment of the spacer for power transmission and distribution, and FIG. FIGS. 7 and 8 are front views showing how spacers are attached to conventional power transmission lines, and side views showing different configurations of conventional spacers for power transmission and distribution. 1A...Upper spacer main body, 1B...Lower spacer main body, 11...Clamp device, 12...Clamp fitting as a clamp part, 13...Connection fitting, 2
0...First connection piece as a first connection part, 21...
...Second connection piece as a second connection part, 24...Mounting fitting, 25...First connection part, 26...Second connection part, 31...Clamp fitting as a clamp part, La, Lb , Lc...Power transmission line.

Claims (1)

[Scope of utility model registration request] In a power transmission/distribution spacer clamping device that is attached to multiple phase power lines to prevent phase-to-phase short circuits, a clamp part 12 that clamps the middle phase wire Lb and an intervening device between the upper phase and middle phase wires La and Lb are used. The first connecting part 20 rotatably connects the lower end of the spacer main body 1A to be installed, and the upper end of the spacer main body 1B interposed between the lower phase and middle phase electric wires Lc and Lb is rotated. A clamping device for a spacer for power transmission and distribution, characterized in that it is provided with a second connecting portion 21 that can be connected to each other.