JP2013188064A - Double torsional damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double torsional damper for preventing vibration of a power-transmission wire, capable of preventing weights of the damper from falling.SOLUTION: A double torsional damper comprises: an electric wire holding clamp 30 that includes a suppression wire compression hole 37, and a wire net compression hole 39 provided above the suppression wire compression hole 37; and weights 20 each of which has a fixing part 25 for fixing an end of a suppression wire 10. A central portion of the suppression wire 10 is compressed and fixed to the inside of the suppression wire compression hole 37. Both sides of the suppression wire 10 having the central portion compressed and fixed to the inside of the suppression wire compression hole 37 are covered with wire nets 40. One ends of the wire nets 40 on the electric wire holding clamp 30 side are compressed and fixed to the inside of a wire net compression hole 39, and both ends of the suppression wire 10 covered with the wire nets 40 are compressed and fixed to the fixing parts 25 of the weights 20 together with the other ends of the wire nets 40.

Description

  The present invention relates to a transmission line vibration preventing device, and more particularly to a double torsional damper that prevents a weight of a double torsional damper from falling.

  When the wind blows on the power transmission line, a Karman vortex, which is a cross-spreading vortex, is generated on the leeward side of the electric wire, and vibration having an amplitude of 1 to several tens of millimeters is generated. This vibration repeatedly applies stress to the electric wire at a reflection point of vibration such as a suspension support point or a tension clamp that becomes a fixed point of the transmission line, and causes deterioration of the metal fatigue or breakage of the transmission line over time. In order to prevent this, a vibration preventing device is attached in the vicinity of the support point of the transmission line.

  FIG. 5 is a damper configuration diagram showing the configuration of a double torsional damper which is a conventional vibration preventing device. In FIG. 5, a conventional double torsional damper 300 includes a restraining wire 10, a weight 20, and a wire gripping clamp 30. The weight 20 includes a fixing portion 25 that is fixed to the suppression wire 10, and is fixed to both ends of the suppression wire 10. The wire gripping clamp 30 includes a clamp portion 35 that grips the transmission line 50 and a suppression wire compression hole 37 that is fixed to the suppression wire 10, and the suppression wire compression hole 37 is compressed at the center of the suppression wire 10. The restraining line 10 is fixed and attached to the power transmission line 50 by the clamp portion 35.

  In the double torsional damper 300 of FIG. 5, the Karman vortex vibration generated by the wind is transmitted to the suppression wire 10 and the weights 20 at both ends via the clamp portion 35. As a result, a new vibration is generated in the suppression line 10. This new vibration has a phase and period different from those of the Karman vortex, and acts to cancel the vibration of the Karman vortex, thereby preventing the fatigue and breakage of the power transmission line 50 over time.

  However, when new vibrations that act to cancel vibrations due to Karman vortices occur repeatedly over a long period of time, a plurality of fine wires constituting the suppression lines 50 rub against each other, resulting in deterioration of metal fatigue. The accident occurred that the weight 20 was broken and the weight 20 was dropped.

  Patent Document 1 discloses that an excessive input energy is applied to an overhead wire in an overhead wire anti-vibration device in which a central portion of a restraining wire made of a steel stranded wire is fixed to an electric wire gripping clamp and weights are fixed to both ends thereof. The anti-vibration device prevents the weight from falling off due to the fatigue breakage of the deterrence line of the anti-vibration device due to the slight wind vibration that occurs when the actuates, regardless of whether the deterrence line is broken or not. There is a description of a vibration isolator that prevents the weight from falling off.

JP 2006-230172 A

  The present invention has been made to solve such problems, and an object of the present invention is to provide a double torsional damper that prevents the weight of the double torsional damper that prevents vibration of the transmission line from falling.

  The double torsional damper of the present invention is a double torsional damper comprising a deterrence line, a weight fixed to both ends of the deterrence line, and an electric wire gripping clamp to which a central portion of the deterrence line is fixed. There is a compression hole and a wire net compression hole on the upper part of the restraining line compression hole, the weight has a fixing part that fastens the end of the restraining line, and the central part of the restraining line is in the restraining line compression hole. Both sides of the deterrence wire which is compressed and fixed and the central part is compressed and fixed in the deterrence wire compression hole are covered with a wire net, and the wire net end of the wire net on the wire gripping clamp side is compressed and fixed in the wire net compression hole. The both ends of the restraining wire covered with the wire net are compressed and fixed to the fixing portion of the weight together with the other end of the wire net.

  The double torsional damper of the present invention is a double torsional damper comprising a deterrence line, a weight fixed to both ends of the deterrence line, and an electric wire gripping clamp fixed to the center of the deterrence line. It has wire compression holes and has wire net fasteners that are mounted on the electric wire gripping clamps and compress and fix the wire nets attached separately to the restraining wires, and the wire net fasteners have wire net compression holes. The weight has a fixing part that fixes the end of the deterrence line, the central part of the deterrence line is compressed and fixed in the suppression line compression hole, and the central part of the wire net is in the wire net compression hole, Both ends of the deterrence line and the both ends of the wire net provided side by side with the deterrence line are both compressed and fixed to the fixing part of the weight.

  ADVANTAGE OF THE INVENTION According to this invention, the double torsional damper which has the fall prevention mechanism of the weight of the double torsional damper which prevents the vibration of a power transmission line can be provided.

The block diagram of the double torsional damper which shows 1st Example by this invention. The fall prevention figure which shows the fall prevention state of the weight of a 1st Example. The block diagram of the double torsional damper which shows the 2nd Example by this invention. The fall prevention figure which shows the fall prevention state of the weight of a 2nd Example. The damper block diagram which shows the structure of the conventional double torsional damper.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a double torsional damper according to a first embodiment of the present invention. In FIG. 1, a double torsional damper 100 includes a deterrence wire 10, a weight 20 fixed to both ends of the deterrence wire 10, and an electric wire gripping clamp 30 to which a central portion of the deterrence wire 10 is fixed. Has a suppression wire compression hole 37 and a wire net compression hole 45 at the upper part of the suppression wire compression hole 37.

  The weight 20 has a fixing portion 25 that fixes the end portion of the deterrence wire 10, and the central portion of the deterrence wire 10 is compression-fixed in the deterrence wire compression hole 37, and the central portion is within the deterrence line compression hole 37. Both sides of the restraining wire 10 compressed and fixed in FIG. The wire net end of the wire net 40 on the side of the electric wire gripping clamp 30 is compressed and fixed in the wire net compression hole 39. Both ends of the restraining wire 10 covered with the wire net 40 are compressed and fixed to the fixing portion 25 of the weight 20 together with the other end of the wire net 40.

  FIG. 2 is a fall prevention diagram showing a fall prevention state of the weight of the first embodiment. In FIG. 2, as in the conventional case, when new vibrations that act to cancel vibrations due to Karman vortices occur repeatedly over a long period of time, a plurality of fine lines constituting the suppression lines 10 rub against each other. However, since the weight 20 is about to fall, the restraining wire 10 is covered with the wire net 40 and is not held and dropped by the wire net 40. By detecting this state by regular inspection and replacing it with a new double torsional damper 100, it is possible to maintain the vibration prevention of the transmission line.

  FIG. 3 is a block diagram showing the configuration of the inhibition line according to the second embodiment of the present invention. In FIG. 3, the double torsional damper 200 includes a restraining wire 10, a weight 20 secured to both ends of the restraining wire 10, and an electric wire gripping clamp 30 secured to a central portion of the restraining wire 10. The wire gripping clamp 30 includes a wire net stopper 36 that includes a restraining wire compression hole 37 and is attached on the wire gripping clamp 30 and compresses and fixes a wire net 40 that is provided separately to the restraining wire 10. ing.

  The wire net stopper 36 includes a wire net compression hole 38, and the weight 20 has a fixing portion 25 that fixes the end portion of the suppression wire 10. The central portion of the deterrence line 10 is compression-fixed in the deterrence line compression hole 37, and the central part of the wire net 40 is compression-fixed in the wire net compression hole 38, and both ends of the deterrence line 10 are deterred. Both ends of the wire net 40 provided along with the wire 10 are compression-fixed to the fixing portion 25 of the weight 20.

  FIG. 4 is a fall prevention diagram showing a fall prevention state of the weight of the second embodiment. In FIG. 4, as in the conventional case, when new vibrations that act to cancel vibrations due to Karman vortices occur repeatedly over a long period of time, a plurality of fine lines constituting the suppression lines 10 rub against each other. However, the weight 20 tends to fall, but the fixing portion 25 of the weight 20 is held by the wire net 40 because it is compressed and fixed to the wire net 40 and the restraining wire 10. Never fall. By detecting this state by regular inspection and replacing it with a new double torsional damper 100, it is possible to maintain the vibration prevention of the transmission line.

  As described above, according to the present invention, it is possible to provide a double torsional damper that prevents the weight of the double torsional damper that prevents vibration of the transmission line from falling.

DESCRIPTION OF SYMBOLS 10 Deterrence line 20 Weight 25 Adhering part 30 Wire clamp 35 Clamp part 36 Wire net stopper 37 Inhibition line compression hole 38, 39 Wire net compression hole 40 Wire net 50 Power transmission line 100 Double torsional damper by this invention 110 Conventional Double torsional damper

Claims (2)

In a double torsional damper comprising a restraining wire, a weight secured to both ends of the restraining wire, and an electric wire gripping clamp secured to a central portion of the restraining wire,
The electric wire gripping clamp has a suppression wire compression hole, and a wire net compression hole on the upper portion of the suppression wire compression hole,
The weight has a fixing portion that fixes an end portion of the deterrence line, and a central part of the deterrence line is compressed and fixed in the deterrence line compression hole,
Both sides of the deterrence line in which the central portion is compressed and fixed in the deterrence wire compression hole are covered with a wire net, and the wire net end of the wire net on the wire gripping clamp side is compressed and fixed in the wire net compression hole. And
The double torsional damper is characterized in that both ends of the restraining wire covered with the wire net are compression-fixed to the fixing portion of the weight together with the other end of the wire net. In a double torsional damper comprising a restraining wire, a weight secured to both ends of the restraining wire, and an electric wire gripping clamp secured to a central portion of the restraining wire,
The wire gripping clamp includes a wire net stopper that has a restraining wire compression hole and is attached on the wire gripping clamp and compresses and fixes a wire net provided separately from the restraining wire. The net stopper has a wire net compression hole,
The weight has a fixing portion that fixes the end of the restraining line,
The central portion of the suppression line is compressed and fixed in the suppression line compression hole,
The central portion of the wire net is compressed and fixed in the wire net compression hole,
The double torsional damper is characterized in that both ends of the restraining line and both ends of the wire net attached to the restraining line are compression-fixed to the fixing portion of the weight.

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