JPS6031170B2 - How to install low-noise electric wires - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improved method for constructing low noise electric wires.

For example, as shown in Figure 1, a spiral wire 1 is placed around the electric wire 1.
A low-noise electric wire in which 0 is wound as shown in the figure is known.

Since the electric wire 1 itself is a linear body with a uniform cross section, when it receives wind pressure, a uniform air flow occurs in the circumferential direction around its outer periphery, and this fluid separates backward from the outer surface of the electric wire at the rear of the electric wire. When doing so, it gives a vibrating sound to the air. However, when the outer circumference is uniform, the length and time of the flow of the air fluid on the circumference of the electric wire are approximately the same over the longest length, so the amplitude of the vibration sound is the same over the long length, so it is possible to identify Vibrating sounds with frequencies of 1 and 2 are concentrated and may be aggravated to produce abnormal noise.

The one shown in FIG. 1 is intended to reduce noise by randomizing the outer circumferential surface of the bus bar 1 using outer wires 10, disturbing the vibration frequency, and preventing abnormal noise.

In order to attach the spiral wire 10, generally the electric wire 1 is attached first.
This is done by constructing a bridge and then winding a wire wire 10 around its outer periphery.

In this case, it is common for workers to wind the wire while moving around it while riding a whistle, so it is difficult to work with too long bare wires, so preformed wires of 1 to 3 digits are attached one by one. Most of it is about doing things. Therefore, adjacent spiral threads become so-called connections, but conventionally, as shown in frame A in FIG.
b are butted together (of course there may be a gap between them), but as shown in frame B in Figure 3, both 10a and 10b
They were wrapped, but they were wrapped in a position where they were hugging each other. This is because doing so is the most natural winding operation. However, if it is connected as shown in Figure 2 or Figure 3, the entire spiral Aoi wire 10 will extend in the longitudinal direction of the wire (spiral shape As a result, the spiral wire becomes loose, which can sag and cause a short circuit accident.

The present invention aims to provide a method for constructing a low-noise electric wire that can completely eliminate such loosening of the spiral strands.

This will be explained according to FIG.

Once the first spiral strand 10 is wound around the electric wire 1, the second spiral wire 102 is then wound around the outside of the end 10b of the first spiral strand 10 as shown in the figure. As shown in frame C, the second spiral wire 102
The second spiral strand 102 is wound so that the end portions 10a of the wires are in a superposed state and both ends are pushed against each other in the longitudinal direction of the wire.

Thereafter, the spiral strands of the third spiral millet wire are sequentially wound in this manner while pressing and polymerizing the ends thereof in the same manner. In the low-noise electric wire constructed in this way, when an elongation force is applied to one spiral strand, for example, 10, the end 10b of the spiral strand 10b is
As a result, the end portion 10a of the spiral wire 102 is pushed, and a kneading force acts on the spiral wire 102.

Therefore, the repulsive force of the binding force acts to push back the end portion 10b, and the spiral strand does not extend out as in the case of the subordinate figure 2 or 3. As a result, even if there is icing or snow, galloping, etc., it is possible to completely prevent the occurrence of accidents caused by sagging of the spiral strands as in the prior art.

[Brief explanation of drawings]

Fig. 1 is a partial explanatory diagram showing an example of the configuration of a low-noise electric wire, Figs. 2 and 3 are explanatory diagrams showing the connecting portion of the subordinate wires, and Fig. 4 shows the erection method according to the present invention. It is an explanatory diagram. 1: Electric wire, 10, 10,, 102: Spiral wire, 1
0a, 10b: End. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. In the construction of a low-noise electric wire that reduces noise by sequentially attaching spiral strands of a fixed length to an electric wire and winding them, the ends of adjacent wound strands press against each other in the longitudinal direction of the wire. A method for constructing a low-noise electric wire, which is characterized by sequentially winding the wire while overlapping each other.