JP2673201B2 - Anti-snow and wind noise prevention rod - Google Patents
Anti-snow and wind noise prevention rodInfo
- Publication number
- JP2673201B2 JP2673201B2 JP62156185A JP15618587A JP2673201B2 JP 2673201 B2 JP2673201 B2 JP 2673201B2 JP 62156185 A JP62156185 A JP 62156185A JP 15618587 A JP15618587 A JP 15618587A JP 2673201 B2 JP2673201 B2 JP 2673201B2
- Authority
- JP
- Japan
- Prior art keywords
- snow
- wind noise
- rod
- spiral
- preventing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Non-Insulated Conductors (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は着雪および風音防止兼用ロッドに関するも
のである。
（従来の技術と発明が解決すべき問題点）
送電線に比較的多く起こる問題は、その表面の着雪
と、風による騒音である。
この着雪防止のためには従来第３図に符号101で示さ
れるような着雪防止リングが広く用いられている。この
着雪防止リング101は、架空裸電線１の撚り溝1Aに沿っ
て滑動する電線上の着雪を集めてその脱落を促進させる
という防止メカニズムによるものであるが、このリング
は一般にプラスチックで作られているため熱伝導率が悪
く、このためリング自身の温度が低くなって着雪がこの
リング付近で凍結してしまい、雪の脱落を防止する本来
の働きが失われることが多い欠点がある。
また風騒音防止のためには、その原因となるカルマン
渦の規則的な発生を阻害する螺旋状風音防止ロッド102
が周知であり、図示のように前述の着雪防止リング101
と併用されることも多い。
この風音防止ロッド102自体に特に欠点はないが、風
騒音と着雪という二大問題防止のために、送電線にそれ
ぞれ別の対策手段を併せ講じなければならないことが極
めて煩雑であり、したがって施工性も悪い欠点がある。
（問題点を解決するための手段）
この発明は上述の問題を解決するためになされたもの
であって、着雪防止部と風音防止部とを併有するロッ
ド、具体的には、螺旋状の金属線材であって、装着すべ
き架空裸電線の撚り溝とほぼ直交する螺旋状に成形され
た着雪防止部と、この着雪防止部の螺旋ピッチよりも大
なる螺旋ピッチを有する螺旋状に成形された風音防止部
とを交互に連続的に設けてなる着雪および風音防止兼用
ロッドである。
（実施例）
第１図についてこの発明の第１実施例を説明する。
たとえば鋼線のような適宜の金属線材によって連続一
体の螺旋状に成形された着雪および風音防止兼用ロッド
２は、装着すべき架空裸電線１の外径よりも僅かに小さ
い螺旋内径を有し、相対的に長い螺旋ピッチpLを有する
風音防止部22の両端部に、この架空裸電線１の撚り溝1A
にほぼ直交する螺旋状の、相対的に短い螺旋ピッチpSを
有する着雪防止部21が連設されているものであって、こ
の例の場合は、風音防止部22が１コイル分、また着雪防
止部21がコイル分設けられている。
風音防止部22螺旋ピッチpLの値は、通常50〜500mmの
範囲とされ、また着雪防止部21の螺旋ピッチpSとして
は、そのコイル部が架空裸電線１の撚り溝1Aとほぼ直交
する条件から、第４図において△ABEと△BCDとが相似と
なり、架空裸電線１の外径をｄとして、pS＝4d2/p前後
の値が適当である。
第２図はこの発明の第２実施例を示すものであって、
このものではロッド２の中央部に着雪防止部21が１コイ
ル分設けられ、その両側に風音防止部22がそれぞれ１コ
イル分づつ設けられ、さらに両端に着雪防止部21がそれ
ぞれ２コイル分設けられている。
いずれの実施例においても、架空裸電線１の撚り溝1A
にほぼ直交する螺旋状の着雪防止部21が、撚り溝1Aに沿
って滑動する着雪をそこに衝突させて脱落させるように
作用し、風音防止部22が架空裸電線１の後流におけるカ
ルマン渦の発生を抑制して風騒音を防止するわけであ
る。
この着雪および風音防止兼用ロッド２は金属線材で作
られているから、架空裸電線１からの伝導熱によって温
められ冷却されることがなく、その点で従来の着雪防止
リングに見られるような欠点を生じることがない。ま
た、この発明の着雪および風音防止兼用ロッド２をキユ
リー点が０℃付近の低キュリー材で作れば着雪防止の点
でさらに効果的であることがわかる。
（発明の効果）
この発明の着雪および風音防止兼用ロッドは、螺旋状
の金属線材に着雪防止部と風音防止部が連設されたもの
であるので、これを単に架空裸電線に巻装させるだけの
簡単な作業を施すことによって、着雪防止と風音防止の
両方の効果を満たすことができるものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a rod for preventing snow accretion and wind noise. (Problems to be Solved by Conventional Techniques and Inventions) Relatively frequent problems in power transmission lines are snow accretion on the surface and noise caused by wind. In order to prevent the snow accretion, a snow accretion preventing ring as shown by reference numeral 101 in FIG. 3 has been widely used. This snow-prevention ring 101 is based on a preventive mechanism that collects snow on the wire sliding along the twisted groove 1A of the overhead bare wire 1 and promotes its fall, but this ring is generally made of plastic. Therefore, the thermal conductivity is poor, and the temperature of the ring itself becomes low, so that snow accretion freezes in the vicinity of this ring, and the original function of preventing snow from falling is often lost. Further, in order to prevent wind noise, the spiral wind noise prevention rod 102 that inhibits the regular generation of Karman vortices, which is the cause,
Is known, and as shown in the drawing, the snow-prevention ring 101 described above.
Often used together with. The wind noise prevention rod 102 itself has no particular drawbacks, but it is extremely complicated that it is necessary to take separate countermeasures for the power transmission line in order to prevent the two major problems of wind noise and snow. It also has the drawback of poor workability. (Means for Solving Problems) The present invention has been made to solve the above problems, and is a rod having both a snow accretion prevention portion and a wind noise prevention portion, specifically, a spiral shape. A metal wire rod having a snow-prevention portion formed in a spiral shape substantially orthogonal to the twist groove of the overhead bare wire to be mounted, and a spiral shape having a spiral pitch larger than the spiral pitch of the snow-prevention portion. A rod for preventing snow accretion and wind noise, which is formed by alternately and continuously providing wind noise prevention portions formed in the above. (Embodiment) A first embodiment of the present invention will be described with reference to FIG. For example, a rod 2 for preventing snow and wind noise, which is continuously and integrally formed into a spiral shape by using an appropriate metal wire material such as a steel wire, has a spiral inner diameter slightly smaller than the outer diameter of the overhead bare wire 1 to be mounted. However, the twist groove 1A of this overhead bare wire 1 is provided at both ends of the wind noise prevention part 22 having a relatively long spiral pitch p L.
In the case of this example, the wind noise preventive portion 22 is equivalent to one coil, and the snow accretion preventive portion 21 having a relatively short spiral pitch p S substantially orthogonal to In addition, the snow accretion prevention unit 21 is provided for each coil. The value of the spiral pitch p L of the wind noise prevention unit 22 is usually in the range of 50 to 500 mm, and as the spiral pitch p S of the snow accretion prevention unit 21, its coil portion is almost the same as the twist groove 1A of the overhead bare wire 1. From the orthogonal conditions, ΔABE and ΔBCD are similar in FIG. 4, and a value around p S = 4d 2 / p is appropriate, where the outer diameter of the overhead bare wire 1 is d. FIG. 2 shows a second embodiment of the present invention.
In this structure, a snow accretion preventive portion 21 is provided in the center of the rod 2 for one coil, a wind noise preventive portion 22 is provided for each coil on both sides thereof, and two snow accretion preventive portions 21 are provided at both ends. It is provided for minutes. In any of the examples, the twisted groove 1A of the overhead bare wire 1
The snow accretion prevention part 21 in a spiral shape substantially orthogonal to the above acts to collide with the snow accretion sliding along the twisted groove 1A and drop it off, and the wind noise prevention part 22 causes the wake of the overhead bare wire 1 to flow. The wind noise is prevented by suppressing the generation of Karman vortices. Since this rod 2 for preventing snow accretion and wind noise is made of a metal wire rod, it is not heated and cooled by the conductive heat from the overhead bare electric wire 1, and in that respect, it is found in the conventional snow accretion prevention ring. There is no such drawback. Further, it can be seen that if the rod 2 for preventing snow accretion and wind noise of the present invention is made of a low Curie material having a Curie point of around 0 ° C., it is more effective in preventing snow accretion. (Effect of the Invention) The snow and wind noise preventing rod of the present invention is a spiral metal wire in which a snow accumulation preventing portion and a wind noise preventing portion are connected in series. By carrying out a simple work of winding, it is possible to satisfy both the effects of preventing snow accretion and preventing wind noise.
【図面の簡単な説明】
第１図はこの発明の第１実施例を示す側面図、第２図は
第２実施例を示す側面図、第３図は従来の技術を示す側
面図、第４図は着雪防止部の螺旋ピッチを算出するため
の説明図である。
２……着雪および風音防止兼用ロッド、21……着雪防止
部、22……風音防止部、pS,pL……螺旋ピッチ。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a first embodiment of the present invention, FIG. 2 is a side view showing a second embodiment, and FIG. 3 is a side view showing a conventional technique. The figure is an explanatory diagram for calculating the spiral pitch of the snow accretion prevention unit. 2 …… Snow and wind noise prevention rod, 21 …… Snow accumulation prevention part, 22 …… Wind noise prevention part, p S , p L …… Spiral pitch.
Claims (1)
（１）の撚り溝（1A）とほぼ直交する螺旋状に成形され
た着雪防止部（21）と、この着雪防止部（21）の螺旋ピ
ッチ（pS）よりも大なる螺旋ピッチ（pL）を有する螺旋
状に成形された風音防止部（22）とが交互に連続して設
けられていることを特徴とする着雪および風音防止兼用
ロッド。 ２．前記金属線材が、低キユリー材であることを特徴と
する、特許請求の範囲第１項記載の着雪および風音防止
兼用ロッド。(57) [Claims] A spiral metal wire rod, which is formed in a spiral shape and is substantially orthogonal to the twist groove (1A) of the overhead bare wire (1) to be mounted, and the snow snow prevention part (21). ) And a wind noise prevention part (22) formed in a spiral shape having a spiral pitch (p L ) larger than the spiral pitch (p S ) of FIG. A rod that also prevents snow and wind noise. 2. The rod for combined use for preventing snow accretion and wind noise according to claim 1, characterized in that the metal wire is a low quality material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62156185A JP2673201B2 (en) | 1987-06-23 | 1987-06-23 | Anti-snow and wind noise prevention rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62156185A JP2673201B2 (en) | 1987-06-23 | 1987-06-23 | Anti-snow and wind noise prevention rod |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPS641412A JPS641412A (en) | 1989-01-05 |
| JPH011412A JPH011412A (en) | 1989-01-05 |
| JP2673201B2 true JP2673201B2 (en) | 1997-11-05 |
Family
ID=15622222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62156185A Expired - Fee Related JP2673201B2 (en) | 1987-06-23 | 1987-06-23 | Anti-snow and wind noise prevention rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2673201B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200389363Y1 (en) * | 2005-04-06 | 2005-07-14 | 최천호 | Safty net structure for building construction |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5236224Y2 (en) * | 1972-05-29 | 1977-08-18 | ||
| JPS6172034U (en) * | 1984-10-16 | 1986-05-16 |
-
1987
- 1987-06-23 JP JP62156185A patent/JP2673201B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS641412A (en) | 1989-01-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |