JP5847026B2 - Double torsional damper - Google Patents

Description

  More particularly, the present invention relates to a double torsional damper in which a suppression wire of the double torsional damper has a weight drop prevention mechanism.

  When wind blows on the overhead electric wire, 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 gives repeated stress to the electric wire at the reflection point of vibration such as a suspension support point or a tension clamp which becomes a fixed point of the overhead electric wire, and causes the metal fatigue deterioration and breakage with time. In order to prevent this, a vibration preventing device is attached in the vicinity of the support point of the overhead electric wire.

  FIG. 7 is a damper configuration diagram showing the configuration of a double torsional damper which is a conventional vibration preventing device. In FIG. 7 a, the double torsional damper 110 has a restraining wire 27, a weight 50, and a wire gripping clamp 60. The weight 50 includes a fixing portion 55 that is fixed to the suppression line 27, and is fixed to both ends of the suppression line 27. The wire gripping clamp 60 includes a clamp portion 65 that grips the overhead electric wire 70 and a restraining wire compression hole 67 fixed to the restraining wire 27, and the restraining wire compression hole 67 is compressed at the center of the restraining wire 27. The restraining wire 27 is fixed and attached to the overhead electric wire 70 by the clamp portion 65.

  In the double torsional damper 110 of FIG. 7 a, the Karman vortex vibration generated by the wind is transmitted to the suppression wire 27 and the weights 50 at both ends via the clamp portion 65. As a result, a new vibration is generated in the suppression line 27. This new vibration has a phase and a period different from those of the Karman vortex, and acts to cancel the vibration of the Karman vortex, thereby preventing fatigue and breakage of the overhead electric wire 70 over time.

  FIG. 7 b is a configuration diagram showing a configuration of a conventional inhibition line. In FIG. 7 b, the conventional restraining wire 27 is composed of a core wire 15 and a plurality of outer peripheral wires 20, and the plurality of outer peripheral wires 20 are twisted around the core wire 15. Conventionally, this suppression line 27 has been used as the suppression line 27 in FIG. 7a. However, when new vibrations that act to cancel vibrations due to Karman vortices occur repeatedly on the suppression line 27 over a long period of time, an event occurs in which the metal 50 deteriorates and breaks and the weight 50 falls off. .

  In Patent Document 1, the deterrence line that supports the weight of the double torsional damper is broken to prevent the weight from falling due to metal fatigue due to vibration, and the deterrence line is broken before the weight is dropped. For detection, one of the seven restraining wires is replaced with a composite stranded wire that is more flexible than the other six, delaying the breakage, and increasing the deformation due to the weight of the weight, thereby breaking the restraint wire. There is a description to make it easier to detect.

JP 2012-005203 A

  The present invention has been made in order to solve such a problem, and an object of the present invention is to prevent the double torsional damper's deterrence line from having a weight fall prevention mechanism and to prevent the Provides a double torsional damper that does not fall and is easy to find a break.

  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 central part of the deterrence line. And a deterrence wire main body formed by twisting a plurality of outer peripheral lines on the core wire, wherein both ends of the core wire of the deterrence wire main body are longer than the both ends of the outer peripheral line by a predetermined length, and the deterrence wire main body Each of the core wire and the outer peripheral line is covered, and the end of the core wire is pushed to the end of the outer peripheral line, and the sleeve is opened at one end. It has a slack between the weight and the electric wire gripping clamp.

  The restraining wire main body of the restraining wire of the double torsional damper of the present invention has both ends of the core wire and both ends of the outer peripheral wire having the same end surface, and both ends of the restraining wire main body are convex shapes that push the core wire into a predetermined length And a sleeve that covers the end of the outer peripheral line and the convex hook is pushed to the end of the outer peripheral line and is caulked, and the inserted core is between the weight of the restraining line and the wire gripping clamp. It is characterized by having a slack.

  Both ends of the restraining wire main body of the double torsional damper of the present invention have a sleeve having one end open and a predetermined hole at the center of the other closed end, and a cord pushing pin, respectively. The core wire is squeezed after being pushed by a cord wire pushing pin for a predetermined length, and the pushed cord wire has a slack between the weight of the restraining wire and the wire gripping clamp.

  According to the present invention, since the deterrence wire of the double torsional damper has a mechanism for preventing the weight from falling, the weight of the deterrence wire is prevented from falling due to the breakage of the deterrence wire. A double torsional damper that can be discovered and exchanged can be provided.

The block diagram which shows the structure of the suppression line of 1st Example by this invention. The block diagram which shows the structure of the suppression line of 2nd Example by this invention. The block diagram which shows the structure of the suppression line of the 3rd Example by this invention. The clearance line figure of the suppression line which shows generation | occurrence | production of the clearance gap by caulking of the suppression line. The 1st detection figure which shows the fracture | rupture detection example of the suppression line by this invention. The 2nd detection figure which shows the fracture | rupture detection example of the suppression line by this invention. 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 block diagram showing the configuration of the inhibition line of the first embodiment according to the present invention. FIG. 1 a is a cross-sectional view of a deterrence line showing a cross section of the deterrence line body 25. In FIG. 1a, the restraining wire body 25 of the restraining wire 80-1 is configured by twisting a plurality of outer peripheral wires 20 on a core wire 10 made of a composite stranded wire. In addition, since the suppression line 80-1 is the same type on the left and right, FIG. 1b is a configuration diagram illustrating the configuration of one side of the suppression line.

  In FIG. 1 b, the end of the core wire 10 of the restraining wire body 25 is longer than the end of the outer peripheral line 20 by a predetermined length. The end of the restraining wire main body 25 covers the ends of the core wire 10 and the outer peripheral wire 20, and the end of the core wire 10 is pushed to the end of the outer peripheral wire 20, and is crimped. 30. The pushed-in core wire 10 has a slack at the center portion between the weight 50 and the wire gripping clamp 60 of the restraining wire 80-1 shown in FIG. 5a. Next, this slack will be described.

  FIG. 4 is a gap diagram of the inhibition line showing the occurrence of the gap due to the caulking of the inhibition line. If the core wire 10 is too slack, when the core wire 10 is pushed by the sleeve 30 and squeezed, a gap (laughter) 29 is generated in the outer periphery wire 20, reducing friction between the outer periphery wires 20 and preventing vibration. The effect is reduced. In order to prevent this, it is possible to prevent the gap from being generated by pushing in a predetermined length smaller than the diameter of the conventional core wire 15.

  FIG. 2 is a block diagram showing the configuration of the inhibition line of the second embodiment according to the present invention. In FIG. 2, the restraining wire main body 25 of the restraining wire 80-2 is configured by twisting a plurality of outer peripheral wires 20 onto a core wire 10 made of a composite stranded wire, and an end of the core wire 10 and an end of the outer periphery 20. Have the same end face. FIG. 2 is a block diagram showing the configuration of one side of the deterrence line because it is the left and right type.

  The ends of the restraining wire main body 25 cover the end of the outer peripheral line 20 and the convex scissors 40 that push the core wire 10 to a predetermined length, and the one end that the convex scissors 40 are pushed to the end of the outer peripheral line 20 is opened. And a cylindrical sleeve 30 formed thereon. The pushed-in core wire 10 has a slack in the central portion between the weight 50 of the deterrence wire 80-2 shown in FIG. 5a and the wire gripping clamp 60, and a gap (laughter) 29 is generated in the outer peripheral line 20. Do not have a slack indented for a predetermined length.

  FIG. 3 is a block diagram showing the configuration of the inhibition line of the third embodiment according to the present invention. In FIG. 3, the restraining wire main body 25 of the restraining wire 80-3 is configured by twisting a plurality of outer peripheral wires 20 onto a core wire 10 composed of a composite twisted wire, and the ends of the core wire 10 and the outer periphery 20. Have the same end face. FIG. 3 is a block diagram showing the configuration of one side of the deterrence line because it is the left and right type.

  The end of the restraining wire main body 25 has a cylindrical sleeve 35 having a predetermined hole in the center of the other end that is open at one end and a core pushing pin 50. The sleeve 35 is crimped by the core wire pushing pin 50 pushing the core wire through the hole for a predetermined length. The pressed core wire 10 has a slack in the center portion of the weight 50 and the wire gripping clamp 60 of the restraining wire 80-3 shown in FIG. 5a, and a gap (laughter) 29 is generated in the outer peripheral line 20. Do not have a slack indented for a predetermined length.

  FIG. 5 is a first detection diagram showing an example of detection of breakage of the inhibition line according to the present invention. In FIG. 5a, the restraining line 27 of FIG. 7 is replaced with any of the restraining lines 80-1 to 80-3 of the present invention, and is installed on the overhead electric wire 70 as the double torsional damper 100 of the present invention. In this case, the left weight 50 is in the forward direction with respect to the deterrence lines 80-1 to 80-3 that are parallel to the lower side of the overhead electric wire 70, and the right weight 50 is deterrence lines 80-1 to 80-3. It is fixed in the rearward direction.

  5b-1 and FIG. 5b-2 show a state where the right restraining lines 80-1 to 80-3 are twisted and the weight 50 is rotated downward. At the time of periodic inspection, it is possible to replace the double torsional damper 100 with a new one by determining that it is abnormal if the hanging angle β in FIG.

  FIG. 6 is a second detection diagram showing an example of detection of the deterrence line break according to the present invention. In FIG. 6a, the outer peripheral line 20 of the deterrence line main body 25 is broken and bent on the right side of the deterrence lines 10-1 to 3-3. The weight 50 shows a case where the weight 50 hangs downward at a hang angle α without falling. In FIG. 6b, the outer peripheral line 52 in FIG. 1a is broken, and the core wire 10, which has been slackened, extends, and as shown in FIG. It becomes possible. This makes it possible to more easily find the weight 50 that drastically hangs down during regular inspections, and can be quickly replaced with a new double torsional damper 100.

  As described above, according to the present invention, by pushing the composite stranded wire which is a core wire and caulking the sleeve to make the core wire slack, the slackness is extended when the outer peripheral wire is disconnected, thereby preventing the weight from falling. In addition, since the hanging angle α and angle β are larger than conventional ones, it is possible to more easily detect and replace the abnormality of the deterrence wire at the time of periodic inspection, and a composite stranded wire that is a core wire can be replaced. It is possible to provide a double torsional damper that can prevent the occurrence of a gap (laughter) between the outer peripheral lines of the deterrence line and the reduction of the vibration preventing effect due to the pressing for a predetermined length.

DESCRIPTION OF SYMBOLS 10 Core wire which consists of compound strands 15 Conventional core wire 20 Several outer peripheral wires 25 Deterrence wire main body 27 Conventional deterrence wire 29 Clearance (laugh)
30 Cylindrical sleeve 35 Cylindrical sleeve having a hole in the center 40 Convex rod 50 Weight 55 Fastening portion 60 Clamp for wire grip 65 Clamp portion 67 Deterrence wire compression hole 70 Overhead wire 80-1 According to the first embodiment Suppression line 80-2 Suppression line according to the second embodiment 80-3 Suppression line according to the third embodiment 52 Peripheral line 100 Double torsional damper according to the present invention 110 Conventional double torsional damper
α Hanging angle
β Hanging angle

Claims (3)

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 deterrence line is
A core wire composed of a composite stranded wire has a restraining wire body configured by twisting a plurality of outer peripheral wires,
Both ends of the core wire of the suppression wire body are longer than the both ends of the outer peripheral line by a predetermined length,
And each end of the core wire and the outer peripheral line of the restraining wire main body is covered, and the end of the core wire is pushed to the end of the outer peripheral line, and each sleeve has an open end. And
The double torsional damper characterized in that the pushed core wire has a slack between the weight and the wire gripping clamp. The restraining wire main body of the restraining wire has both ends of the core wire and both ends of the outer peripheral line having the same end surface,
Both ends of the restraining wire main body include a convex ridge that pushes the core wire into a predetermined length, and the sleeve that covers the end of the outer peripheral line and that the convex ridge is pushed to the end of the outer peripheral line. Each has
2. The double torsional damper according to claim 1, wherein the pushed-in core wire has a slack between the weight of the restraining wire and the wire gripping clamp. Both ends of the deterrence wire main body of the deterrence wire have sleeves and core wire pushing pins each having a predetermined hole at the center of the other end which is open and closed at the other end,
The sleeve is crimped after the core wire is pushed a predetermined length by the core wire pushing pin,
2. The double torsional damper according to claim 1, wherein the pushed-in core wire has a slack between the weight of the restraining wire and the wire gripping clamp.

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