JPS6015383Y2 - Wire-type vibration isolator for overhead power lines - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an attachment type vibration isolating device in which an attachment wire is fixed to an overhead electric wire via a clamp.

Conventionally, when a slight breeze hits an overhead wire suspended by a suspension clamp or held back by a detention clamp, vibration occurs, which applies repeated stress to the wire near the mouth of the suspension clamp or detention clamp, causing the wires in this area to become loose. The wire may break due to vibration fatigue.

To avoid this, wires are attached to the wires to absorb the vibration energy of the wires.

If the extension wire is long, as shown in Fig. 3, the extension wire 3 provided around the suspension part 2 of the overhead wire 1 may be fixed to the extension wire 1 via clamps 4 in several places, or If the wires 3 are short, as shown in Fig. 4, the ends of the short extension wires 3 are overlapped and attached to the electric wire 1, and each extension wire 3 is fixed to the electric wire 1 through clamps 4 at both ends. It is.

In any case, the electric wire 1 and the attachment wire 3 are fixed together via a clamp 4, and the clamp 4 is made of metal such as steel or aluminum, and is fixed to the electric wire 1 by tightening bolts and nuts. be.

If the lamp 4 fixes the wire 1 in this way, it is possible to prevent fatigue breakage of the wire at the mouth of the suspension portion 2 or the tie-down portion of the wire 1, but the wire may suffer fatigue breakage at the clamp portion A at the tip of the wire 1. I had many opportunities to do so.

In view of this, the present invention prevents fatigue breakage of the electric wire at part A and provides an excellent vibration isolating device as a whole.In other words, the clamp in this part is not directly fixed to the electric wire, but a rubber-like elastic body is inserted. It was fixed.

This will be explained in more detail based on the embodiment shown in the figures.

Fig. 1 shows the case where it is applied to the wire-type vibration isolator shown in Fig. 4, in which a short wire 3 overlaps the end of an overhead wire 1 suspended by a suspension clamp (not shown). It is the same as the conventional one in that it is fixed with a clamp 41, but in the present invention, the clamp 4 at the end of the extension wire 3 is fixed.
□ has its characteristics.

In other words, the clamp 4□ directly grips the electric wire 1 by connecting the clamp body 51 and the cap 61 with bolts and nuts, as shown in the opening of Figure 2, but the clamp 4□ at the end holds the wire 1 directly as shown in Figure 2A. A rubber-like elastic body 8 is inserted between the clamp body 5 □ and the cap 62 and the electric wire 1, and the clamp 4 □ is firmly tightened with the bolt nut 7, so that the stress on the electric wire 1 is significantly alleviated, preventing wire breakage, etc. This can prevent accidents.

Note that if the rubber-like elastic body 8 is an electrical insulator, there is an advantage that no branching of the electric wire 1 occurs in the extension wire 3 in this part, and heating due to the branching can be prevented.

As explained above, according to the present invention, in an attachment type vibration isolator in which an attachment wire is fixed to an overhead electric wire through a clamp, only the clamp located at the end is fixed by inserting a rubber-like elastic body. Since the electric wire is held softly through the rubber-like elastic body at the end where stress tends to concentrate, the bending stress of the wire due to vibration is alleviated by the deformation of the rubber-like elastic body and becomes significantly smaller. With this modification, we were able to provide a wire-type vibration isolator that appropriately absorbs vibration energy and is free from the risk of accidents such as wire breakage.

Furthermore, the present invention has the additional effect that even if the clamp bolt provided with the rubber-like elastic body loosens, the electric wire will not be damaged.

[Brief explanation of the drawing]

Figure 1 is a side view showing an example of the main parts of the overhead wire attachment type vibration isolator of the present invention, Figure 2 A and 2 are front views showing the endmost clamp and other clamps, respectively. 3 and 4 are explanatory diagrams showing general wire-type vibration isolators. 1... Overhead electric wire, 3... Extension wire, 4...
...Clamp, 4□...Clamp in normal position, 4゜...Clamp at the end, 8...
・Rubber-like elastic body.

Claims (1)

[Scope of utility model registration request] In an attachment type vibration isolator in which an attachment wire is fixed to an overhead electric wire through a clamp, a rubber-like elastic body is inserted between the clamp at the farthest point from the hanging part or the anchoring part of the overhead electric wire and the electric wire. A wire-type vibration isolator characterized by being fixed.