JPH0640421Y2 - Composite anti-vibration damper - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a composite vibration damping damper that absorbs wind pressure vibration generated in an overhead wire and prevents fatigue disconnection of the overhead wire due to vibration.

(Prior Art) Conventionally, the prevention of wind pressure vibration that occurs in overhead lines is
As shown in FIG. 4, weights 11a and 11b and weights 12 are attached to both ends of the damper wire 10 made of steel stranded wire, etc., and a weight 12 is attached to the center, and the weight 12 at the center and the weights 11a and 11b at both ends are attached. The vibration damper formed by fixing the clamps 13 and 13 was attached to the overhead line C to absorb the wind pressure vibration generated in the overhead line C to prevent the vibration fatigue of the overhead line. The damper line 10 between the weight 11a and the clamp 13 is generated by the vibration of the overhead wire C acting on the steel tower detention portion from the center of the space, caused by the vibration of the weight 11a located on the center side of the span of the composite vibration damper. The excess vibration that is not absorbed is absorbed by the friction phenomenon between the twisted strands of
The damper wire 10 between 13 and 13 is absorbed by the frictional phenomenon between the twisted strands and the like, and further, due to the frictional phenomenon between the twisted strands of the damper wire 10 between the weight 11b and the spacer 13 caused by the vibration of the weight 11b. It is configured so that it can be absorbed to reduce wind pressure vibrations that act on the overhead wire detention section and the like, thereby preventing accidents such as strand breakage due to fatigue of the overhead wire C. However, in the composite anti-vibration damper configured as described above, since a large vibration energy always acts on the damper wire 10 between the weight 11a located on the center side of the span and the spacer 13, the weight 11a and The damper wire 10 between the spacers 13 is fatigue fractured in a relatively short period and the weight 11
There was a risk of a falling.

(Structure of the present invention) The present invention has been made in view of the above point, in which a clamp is fixed to the tip end and the base end of a damper wire made of steel stranded wire or the like having a predetermined length and having a weight attached to the tip. The damper wire between the clamps is designed to absorb and reduce the vibration of the overhead wire due to the frictional phenomenon between the twisted wires, etc. It is constructed so that it can be absorbed by the friction phenomenon between the strands.

(Embodiment of the present invention) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a damper wire of a predetermined length made of steel stranded wire, 2
Is a weight attached to the tip of the damper wire 1 by caulking or the like, and 3 and 4 are clamps fixed to the tip and base ends of the damper wire 1 with the weight 2 attached to the tip.

In order to prevent the vibration generated in the overhead wire C by the composite vibration damper of the present invention configured as described above, the clamps 3 and 4 are used so that the weight 2 attached to the tip of the damper wire 1 is located on the tower side. The wind pressure vibration of the overhead wire that is attached to the overhead wire and acts on the steel tower detention part from the center of the span is absorbed and reduced by the friction phenomenon between the twisted wires of the damper wire 1 between the clamps 3 and 4, and the friction between the twisted wires is reduced. Excessive vibration that is not absorbed by the vibration of the weight 2 is absorbed by the frictional phenomenon between the twisted strands of the damper wire 1 between the weight 2 and the clamp 3 caused by the vibration of the weight 2 to prevent vibration fatigue of the overhead wire.

FIGS. 2 and 3 are explanatory views showing a state in which two composite vibration dampers are attached to the overhead line C. In this way, the two composite vibration dampers are attached to the overhead line and the wind pressure vibration of the overhead line is shown. In order to prevent this, as shown in the figure, the weights 2 of both composite anti-vibration dampers,
If both composite anti-vibration dampers are overlapped and installed on the overhead line so that 2 is located on the steel tower side, and if two composite anti-vibration dampers are installed on the overhead line, the third option is used.
As shown in the figure, it is preferable from the standpoint of anti-vibration effect that the composite anti-vibration damper is attached to the overhead wire C such that the attachment angle θ is about 45 ° so that both composite anti-vibration dampers do not come into contact with each other. Needless to say, the two composite vibration dampers may be different in size and the like.

(Effects of the present invention) The present invention is as described above, and the weight 2 attached to the tip of the damper wire 1 of a predetermined length is positioned on the side of the steel tower and the clamp 3,
Just by attaching to the overhead wire C at 4, the large vibration energy acting from the center direction of the span is absorbed and reduced by the friction phenomenon between the twisted wires of the damper wire 1 between the clamps 3 and 4, and the excessive vibration that is not absorbed is absorbed. The damper wire 1 between the weight 2 and the clamp 3 caused by the vibration of the weight 2 is absorbed by the friction phenomenon between the twisted strands, so that the fatigue of the overhead wire due to the wind pressure vibration can be effectively and reliably prevented. Like the composite anti-vibration damper of, large vibration energy acting from the center of the span acts on the diametrical weight, and the damper wire near the weight mounting part is fatigue fractured in a short period of time and the weight falls. There is no fear, and there are excellent advantages such as simple structure and low cost.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention, FIGS. 2 and 3 are explanatory views showing a usage mode of the present invention, and FIG. 4 is an explanatory view showing a conventional composite vibration damper. 1: Damper wire, 2: Weight 3: Clamp, 4: Clamp

Claims (1)

[Scope of utility model registration request] 1. A composite anti-vibration damper, characterized in that a clamp is fixed to the front end and the base end of a damper wire of a predetermined length having a weight attached to the front end.