JP2012034470A - Twist-preventing damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a twist-preventing damper making snow accretion uneven so as to deter lift force, caused by wind, against overhead power transmission lines and ground wires.SOLUTION: The twist-preventing damper comprises: a collar 40 for being fixed on an armor rod 60 covered over an overhead power transmission line and/or a ground wire 70; a loose clamp 50, at one side of the collar 40, crimping the collar 40 to the armor rod 60 to grip both of them; and a clamp section 30 including a rotary movable part 32 and a fitting part 34. The rotary movable part 32 and the collar 40 have stoppers 36 and 45 respectively to stop rotation at a prescribed rotation angle. The rotary movable part 32 is attached on the other side of the collar 40. The fitting part 34 has a rod 20 fitly inserted therein. The rod 20 has weights 10 fitly inserted at both ends thereof.

Description

  The present invention relates to a torsion prevention damper for the purpose of difficult snowing of an overhead power transmission line and a ground line, and more particularly to a torsion prevention damper that makes the snowing shape non-uniform and suppresses the lift received by the line due to wind. .

  When snow adheres to the overhead power transmission line and the ground line, the line is twisted by the moment of snow, and snow accumulating around the line develops into a cylindrical shape, and faults such as disconnection occur due to heavy snowfall. In order to suppress twisting of these lines and prevent heavy snowfall, a twist prevention damper is attached to the overhead power transmission line and the ground line. Since the line to which the twist preventing damper is attached does not cause twisting, snow accretion easily develops in one direction. When this developed snow accretion is subjected to wind, the line is lifted and galloping may occur.

  FIG. 3 is a configuration diagram showing a configuration of a conventional twist preventing damper. In FIG. 3, the conventional torsion prevention damper 200 holds the armor rod 60 attached to the overhead power transmission line / ground wire 70 at one end side of the clamp portion 80, and the weight 10 is fitted to the other end side. The overhead power transmission line / ground line 70 with a damper is not easily twisted, and snow accretion easily develops in one direction, which causes galloping.

  In Patent Document 1, an arm fixed to a clamp that holds a power transmission line, a hemisphere provided at the tip of the arm, an elastic body disposed in contact with the bottom surface of the hemisphere, an elastic body, There is a description that it is composed of a weight having a cavity for accommodating a hemisphere, and the elastic body is in a compressed state in the cavity of the weight.

Japanese Patent Publication No. 50-30277

  The present invention has been made to solve such problems, and an object of the present invention is to provide a torsion prevention damper that makes snow accretion uneven and suppresses lift received by overhead power transmission lines and ground lines due to wind. To do.

  The torsion preventing damper according to the present invention includes a collar attached to an armor rod attached to an overhead power transmission line and / or a ground wire, and a loose clamp that presses and holds the collar against the armor rod in one half of the collar attached to the armor rod. The rotation movable portion and the clamp portion including the fitting portion, and the rotation movable portion and the collar have a stopper that stops the rotation at a predetermined rotation angle. It is attached to one half, a rod is inserted and fitted in the fitting portion, and weights are fitted to both ends of the rod.

  ADVANTAGE OF THE INVENTION According to this invention, the torsion prevention damper which makes the snow accretion shape non-uniform | heterogenous and suppresses the lift which an overhead power transmission line and a ground line receive with a wind can be provided.

The block diagram which shows the structure of the twist prevention damper by this invention. FIG. 3 is a structural diagram showing a structure of a collar and a rotary movable part according to the present invention. The block diagram which shows the structure of the conventional twist prevention damper.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing the configuration of the torsion preventing damper of the present invention. In FIG. 1, the loose clamp 50 holds the collar 40 by pressing it against the armor rod 60 in one half of the collar 40 attached to the armor rod 60 attached to the overhead power transmission line and / or the ground line 70. The rotationally movable part 32 of the clamp part 30 of the twist preventing damper 100 of the present invention is attached to the other half of the collar 40. Further, the rod 20 is inserted and fitted into the fitting portion 34, and the weight 10 is fitted to both ends of the rod 20. The rotationally movable portion 32 and the collar 40 have stoppers 36 and 45, respectively, which are described with reference to FIG. The armor rod 60 may be omitted.

  Snow adhering to the overhead power transmission line / ground line 70 becomes a moment for twisting the line, causing twisting, and snow accretion develops in a direction corresponding to the rotation angle. Next, this will be described in detail.

  FIG. 2 is a structural diagram showing the structure of the collar and the rotary movable part according to the present invention. In FIG. 2, the collar 40 has a stopper 45 that stops rotating at a predetermined rotation angle, and is clamped by a loose clamp 50 with the armor rod 60 in FIG. 1 sandwiched from both sides. The rotation movable part 32 has a stopper 36 that opens and closes in a hinged manner and stops the rotation at a predetermined rotation angle, and is attached to the collar 40 in FIG.

  In FIG. 1 again, the overhead power transmission line / ground line 70 is rotated by a torsional moment due to snowfall, and until the position where the stopper 45 of the collar 40 and the stopper 36 of the rotary movable portion 32 in FIG. Rotate. For this reason, the snow accretion develops in the overhead power transmission line / ground line 70 in the direction corresponding to the rotation angle. For this reason, the phenomenon that the snow accretion develops only in one direction is eliminated, and the galloping phenomenon due to the wind of the overhead power transmission line / ground line 70 that has accreted snow is suppressed. Therefore, it is possible to provide a torsion prevention damper that makes the snowfall shape uneven, suppresses the lift received by the overhead power transmission line and the ground line by the wind, and suppresses the galloping phenomenon.

DESCRIPTION OF SYMBOLS 10 Weight 20 Rod 30 Clamp part 32 Rotation movable part 34 Fitting part 36 Rotation movable part stopper 40 Collar 45 Color stopper 50 Loose clamp 60 Armor rod 70 Overhead power transmission line / ground line 80 Clamp part 100 The twist prevention damper of this invention 200 Conventional twist prevention damper

Claims (1)

A collar attached to an overhead power transmission line and / or an armor rod attached to the ground line;
A loose clamp that clamps and holds the collar against the armor rod in one half of the collar attached to the armor rod;
A clamp part having a rotationally movable part and a fitting part;
The rotation movable part and the collar have a stopper for stopping rotation at a predetermined rotation angle,
The rotationally movable part is attached to the other half of the collar;
A torsion prevention damper, wherein a rod is inserted and fitted into the fitting portion, and weights are fitted to both ends of the rod.

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