JPH0534183Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to an improvement of a damper that prevents twisting of overhead power lines due to snow accumulation.

(Prior art) A conventional damper for preventing twisting of overhead power lines due to snow accumulation has 12 weights at both ends, as shown in Fig. 5.
Clamp 1 at the middle part of support 13 to which 12 is attached.
Structures supported by 1 are widely used. Such a conventional torsion prevention damper has weights 12, 12.
Due to its weight, the snow adhering to the weights slides downward and lands on the lower surface of the weights, and as this is repeated, the snow buildup increases and eventually develops into a tube of snow that envelops the weights 12, 12. For this reason, the weight 12 is installed so as to act as a drag moment against the rotational moment of the snow that has fallen on the overhead power transmission line.
Not only is the weight of weight 12 extremely heavy and there is a risk of damage to overhead power lines, but there is also the risk that large snowflakes that have landed on weights 12 and 12 may fall and damage buildings such as vinyl greenhouses along the line. Furthermore, due to the increase in weight, the preset ratio between the twisting period and the vertical period of the electric wire becomes different, making it easy to cause gear locking vibration.

(Structure of the present invention) The present invention was made for the purpose of solving the above-mentioned problems.
This device is characterized by being equipped with a weight provided with a snow stopper that prevents the accumulated snow from moving downward.

(Embodiment of the present invention) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. The clamp 3 has a cylindrical weight attached to the base end of the hook clamp 1, and the weight 3
Both ends have a hemispherical shape, and a second
As shown in the figure, snow stoppers 4, 4 consisting of concave grooves or as shown in FIG.
4 and falls naturally due to its own weight. In addition, in the above embodiment, the reason why only the inner peripheral surface of the hook-shaped wire attachment part 2 to be attached to the electric wire O is coated with insulating rubber 7, etc. is that the overhead power transmission line in the part where the twist prevention damper is attached is fatigued. In order to prevent this, when the torsion prevention damper 5 of the present invention is installed around the overhead power transmission line O by winding the Armarod 6 as shown in FIGS.
This is to establish electrical continuity between the wire and the anti-twist damper 5 via the armarod 6, and the hook-shaped wire attachment portion 2
If the entire inside and outside of the wire is coated with insulating rubber or the like, the anti-twist damper 5 and the overhead power transmission line O will be insulated, and if the weight 3 comes into contact with a wire of a different phase due to gear locking etc. and a short circuit between different phases occurs. , a current of 4,000 to 6,000 clones or more flows through the anti-twist damper 5, creating a strong arc in the part of the wire where the anti-twist damper 5 is attached, which may cause the overhead power line O to be cut off. This can be reliably prevented by electrically connecting the overhead power transmission line O and the twist prevention damper 5. Furthermore, in this embodiment, the distance from the center position of the overhead power transmission line O to the center position of the weight 3 of the anti-twist damper 5 is made as small as possible, so that even if the weight of the anti-twist damper 5 increases due to snow accumulation, this can be avoided. The influence exerted on the electric wire as a moment is reduced, and the preset ratio between the twisting period and the vertical period of the electric wire does not vary greatly.

Fig. 4 shows a hook-shaped wire attachment part 2 in which both ends of a weight 3 are provided with snow stoppers 4, 4 on both sides in the longitudinal direction, and the inner peripheral surface is coated with insulating rubber or the like.
This is an explanatory view showing another embodiment of the present invention in which the weight 3 is supported by a clamp 1 having When winding and fixing both hook-shaped wire attachment parts 2, 2 with Armarod 6 having a predetermined length, both attachment parts 2, 2 are fixed by aligning the center position of Armarod 6 with the above mark and winding and fixing. can be fixed to the overhead power transmission line O with uniform winding force.

Incidentally, the wire attachment part 2 is not limited to a hook shape, but may be a normal gripping clamp shape.

(Effects of the present invention) According to the present invention, the weight 3 having the snow stopper parts 4, 4 is provided at the base end of the clamp 1 having the wire attachment part 2 as described above. The snow that adheres to the weight and slides downward is prevented from moving by the snow stoppers 4, 4, and falls naturally due to its own weight.As in the conventional case, the snow that adheres to the weight develops greatly and its weight causes the anti-twisting damper to The overhead power transmission line where the cable is attached may be damaged, large snowflakes that have grown and grown on the weight may fall and damage buildings such as greenhouses along the line, or the twisting cycle and vertical cycle of the cable may be affected. This has an excellent advantage in that it can effectively prevent accidents such as changing the preset settings of gearing and making gearing vibration more likely to occur.

[Brief description of the drawings]

Figure 1 is a front view showing one embodiment of the present invention;
3 and 3 are partially cutaway side views showing the main parts of FIG. 1, and FIG. 4 is a front view showing another embodiment of the present invention.
FIG. 5 is a front view of a conventional anti-twist damper. 1... Clamp, 2... Wire attachment part, 3... Weight, 4... Snow stopper part, 5... Twisting prevention damper.

Claims (1)

[Claims for Utility Model Registration] 1. A torsion-preventing damper characterized by having a weight provided with a snow stopping part for preventing the downward movement of accumulated snow attached to the end of a clamp base having an electric wire attachment part. 2. The anti-twist damper according to claim 1, wherein the snow stopper portion is formed of a concave groove. 3. The anti-twisting damper according to claim 1, wherein the snow stopper portion comprises a protruding strip.