JPS6022757Y2 - Anti-vibration device for tension-resistant suspension parts - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wire-type vibration isolator in a tension-resistant suspension section in which an overhead power transmission line is suspended by being held down via a restraining clamp.

Conventionally, so-called tension-type steel towers have been generally used when overhead power transmission lines are long or at curved sections of the line.

In these tension-resistant steel towers, the overhead power transmission lines are held in place by retaining clamps, and the clamps are often connected with separate jumper wires.

Even in the suspended portion of such a tension-resistant steel tower, the wires may suffer vibration fatigue and break at the mouth of the retaining clamp that holds the overhead power transmission line in place.

In order to avoid this, conventionally, as shown in Fig. 4, a desired length of extension wire 5' is attached to the wire 1' near the mouth of the retaining clamp 2' via a clamp 6' in an overlapping manner to avoid vibrations of the wire 1'. When absorbing energy, the adjacent clamps 61' and 6□' are made at an angle θ as shown in FIG. 5, so that the overlapping extension wires 5' do not come into contact with each other.

Although such a vibration isolating device is useful for preventing vibration of the electric wire 1', it cannot prevent vibration of the jumper wire 4'.

In view of this, the present invention is designed to reduce the vibration of the jumper wire by attaching a predetermined number of extension wires to the electric wire, inserting a reinforcing body between the electric wire and the jumper wire, and fixing the ends to the electric wire and the jumper wire, respectively. Attenuates the attachment wire attached to the wire through the wire, thereby effectively preventing vibration between the wire and the jumper wire, and furthermore, inserting an electrical insulating material in the middle of the reinforcing body prevents current from being shunted from the wire to the reinforcing body. That's what I did.

Next, this will be explained in more detail based on the embodiment shown in the drawings.

Fig. 1 shows an example of the wire-type vibration isolator according to the present invention, in which the electric wire 1 is held by the restraining clamp 2 and the suspended insulator 3
The restraining clamp 2 is suspended from the steel tower (not shown) through the
A jumper wire 4 is connected to the jumper wire 4, which is connected to the other retaining clamp (not shown) to form a tension-resistant suspension.

In this tension-resistant suspension part, the electric wire 1 near the mouth of the retaining clamp 2 is attached to the wire 1 of the desired length through an extension wire 5 or a clamp 6 so as to overlap, and the vibration energy of the electric wire 1 is absorbed and the wire 1 near the mouth of the retaining clamp 2 is attached to This prevents the electric wire 1 from breaking.

The present invention inserts a reinforcing body 7 with an electrical insulating material 8 inserted between the electric wire 1 and the jumper wire 4 in such a tension type suspension part, and one end of the reinforcing body 7 is attached to the electric wire 1. The other end was fixed to the jumper wire 4 with a clamp 9.

According to the present invention, the electric wire 1 is protected by attaching the attachment wire 5, but the jumper wire 4 is also attached with the reinforcing body 7, so that vibrations generated in the jumper wire 4 are transmitted to the electric wire 1 through the reinforcing body 7. Attenuate the vibration with the attached extension wire 5.

The clamp 9 at the end of the reinforcing body 7 may be clamped by overlapping the extension wire 5 as shown in FIG. Even if it is not removed, it will not come into contact with the extension wire 5.

) Alternatively, as shown in FIG. 2, the electric wire 1 may be clamped between the retaining clamp 2 and the clamp 6 of the extension wire 5.

Furthermore, the reinforcing body 7 may be a simple metal steel body, but the reinforcement wire 5
Similarly, if steel strands are used, the reinforcement 7 can also damp vibrations.

Furthermore, since the electrical insulating material 8 is inserted in the middle of the reinforcing body 7 according to the present invention, the current flowing in and out from the electric wire 1 to the jumper wire is not divided through the reinforcing body 7, and therefore the reinforcing body 7 may be thinner than the jumper wire.

The electrical insulating material 8 may be in the form of a sleeve, but as shown in FIG.
3 is compressively connected to the reinforcing body 7, the flexibility of the reinforcing body 7 is not inhibited, and the vibration-proofing effect of the waist jumper wire 4, which acts as the weight of the reinforcing body 7, can be improved.

In FIG. 3, reference numeral 14 indicates a water drain hole in the compression section.

As explained above, according to the present invention, in a tension-resistant suspension section in which an overhead power transmission line is held down via a restraining clamp, a wire-type vibration isolator is attached to the electric wire adjacent to the suspension section, and a jumper wire is attached to the electric wire. By inserting a reinforcing body between them and fixing the ends to the electric wire and jumper wire, the jumper wire is protected from vibration.Furthermore, an electrical insulating material is inserted in the middle of the reinforcing body, so that it can be reinforced from the electric wire. There is no current shunt to the body 7,
Prevents heat generation in the reinforcing body due to shunting, suppresses power loss,
The durability of the reinforcing body can be improved, the reinforcing body can be made thinner than the electric wire, and furthermore, the electrical insulating material acts as a weight, and the vibration-proofing effect can be improved, which has great practical effects.

Furthermore, in the present invention, since the electrical insulating material is interposed between the reinforcing bodies, an insulator that can be easily and reliably connected to the reinforcing bodies can be used as the electrical insulating material.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an example of the vibration isolator for a tension-resistant suspension part according to the present invention, Fig. 2 is an explanatory diagram showing a different embodiment of the invention, and Fig. 3 is an explanatory diagram showing an example of the vibration isolator of the present invention. A side view showing an example of an electrical insulating material inserted into the reinforcing body used, Fig. 4 is an explanatory diagram showing a conventional vibration isolator, and Fig. 5 shows an example of attachment of adjacent clamps of a conventional vibration isolator. It is an explanatory diagram. 1... Electric wire, 2... Detention clamp, 4
...Jumper wire, 5...Additional wire, 7.
...Reinforcement body, 8...Electrical insulating material inserted in the extension wire 7

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a tension-resistant suspension section in which overhead electric wires are held down via a retaining clamp and connected with jumper wires, a predetermined number of extension wires are fixed to the electric wires adjacent to the suspension section via the clamps. When installed, a reinforcing body with an electrical insulating material interposed in the middle is inserted between the electric wire and the jumper wire, and the ends of the reinforcement are fixed to the electric wire and the jumper wire, respectively. Shaking device. 2. The vibration isolator for a tension-resistant suspension part as set forth in claim 1 of the utility model registration claim, wherein the reinforcing body is made of stranded steel wire.