JPH05292639A - Snow melting member - Google Patents
Snow melting memberInfo
- Publication number
- JPH05292639A JPH05292639A JP4085442A JP8544292A JPH05292639A JP H05292639 A JPH05292639 A JP H05292639A JP 4085442 A JP4085442 A JP 4085442A JP 8544292 A JP8544292 A JP 8544292A JP H05292639 A JPH05292639 A JP H05292639A
- Authority
- JP
- Japan
- Prior art keywords
- snow
- transmission line
- melting member
- melting
- ring
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、送電線への氷雪の付
着を防止する融雪部材に関し、特に、架空送電線に取付
けて融雪および融氷を行なうのに適した融雪部材に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow melting member for preventing ice and snow from adhering to a power transmission line, and more particularly to a snow melting member suitable for being attached to an overhead power transmission line to perform snow melting and ice melting.
【０００２】[0002]
【従来の技術】寒冷地方においては、架空送電線に付い
た雪が落下せずに大きな筒雪に発達し、その重量によっ
て架空送電線が切断したり鉄塔が倒壊するなどの雪害事
故が発生している。2. Description of the Related Art In cold regions, snow on overhead power lines does not fall and develops into large snowflakes, and the weight of snow causes accidents such as cutting of overhead power lines and collapse of steel towers. There is.
【０００３】架空送電線に付いた雪は、除雪機の走行や
電線の強制加振等により排除することができるが、ま
た、着雪対策として、電線の表面にリングやひれ等の突
起を設けて雪の回転成長を阻止する技術や、電線に低キ
ュリー点材や加熱線などの発熱材を取付けて雪を溶かす
技術等を用いて難着雪化および融雪化が行なわれてい
る。Snow attached to the overhead power transmission line can be removed by running a snow blower or forcibly exciting the electric wire, but as a measure against snow accretion, a protrusion such as a ring or a fin is provided on the surface of the electric wire. In order to prevent snow from growing, and to fix snow by melting heat by attaching heat-generating materials such as low-Curie point materials and heating wires to electric wires, snow-hardening and snow-melting have been performed.
【０００４】一般に、融雪の技術では、発熱体として電
線に磁性体を装着して交番磁界でのヒステリシス損失お
よび渦電流損失による発熱を利用する。Generally, in the technique of snow melting, a magnetic material is attached to an electric wire as a heating element to utilize heat generation due to hysteresis loss and eddy current loss in an alternating magnetic field.
【０００５】従来、発熱体には、特開昭５８−１７５９
１４に開示されているような磁性体で構成される融雪リ
ングが用いられている。この融雪リングは、鉄、パーマ
ロイ、Ｆｅ−Ｎｉ、またはＦｅ−Ｎｉ−Ｃｒ等の強磁性
金属や希土類元素で構成されている。Conventionally, a heating element has been disclosed in JP-A-58-1759.
A snow-melting ring made of a magnetic material as disclosed in 14 is used. This snow-melting ring is made of a ferromagnetic metal such as iron, permalloy, Fe-Ni, or Fe-Ni-Cr, or a rare earth element.
【０００６】[0006]
【発明が解決しようとする課題】融雪リングは、電線の
外周に環装される。送電線に電流が流れると、電線周囲
に交流磁界が発生し、磁性体で構成される融雪リングは
ヒステリシス損失および渦電流損失による発熱を利用し
て融雪効果を起こす。The snow-melting ring is mounted around the outer circumference of the electric wire. When a current flows through the power transmission line, an AC magnetic field is generated around the electric wire, and the snow-melting ring made of a magnetic material utilizes the heat generated by the hysteresis loss and the eddy current loss to cause the snow-melting effect.
【０００７】また、強磁性金属としては、０℃付近では
小さい電流範囲でも十分に発熱し、高温側では発熱しな
い低キュリー点材が用いられる。低キュリー点材は、雪
の降らない夏場に送電線が発熱することなく、電流損失
を抑えるため使用される。このため、代表的にはキュリ
ー点が約１００℃のＦｅ−３５ｗｔ％Ｎｉ−１０ｗｔ％
Ｃｒ−１ｗｔ％Ｓｉ合金、１１０℃のＮｄＣｏ2 、１０
０℃のＨｏＣｏ2 、４０℃のＥｒＣｏ2 等が用いられ
る。Further, as the ferromagnetic metal, a low Curie point material is used which generates sufficient heat in the small current range near 0 ° C. and does not generate heat on the high temperature side. The low Curie point material is used to suppress current loss without generating heat in the transmission line in the summer when it does not snow. Therefore, typically, the Curie point is about 100 ° C. Fe-35 wt% Ni-10 wt%
Cr-1 wt% Si alloy, NdCo 2 at 110 ° C., 10
0 HoCo 2, 40 ℃ ErCo 2 like in ° C. is used.
【０００８】一方、このような融雪に際しては、水の蒸
発により発熱体の表面温度が上昇しにくく、かつ、つら
らの成長を起こしやすい状況となる。On the other hand, during such snow melting, the surface temperature of the heating element is unlikely to rise due to water evaporation, and icicles are likely to grow.
【０００９】そこで、本発明は、十分な発熱効果を示す
のみならず、融雪により形成した水を効率よく表面から
除去し、着雪が起こりにくい融雪部材を提供することを
目的とする。It is therefore an object of the present invention to provide a snow melting member that not only exhibits a sufficient heat generating effect, but also efficiently removes water formed by snow melting from the surface to prevent snow accretion.
【００１０】[0010]
【課題を解決するための手段】この発明に従う融雪部材
は、送電線への氷雪の付着を防止するため送電線に装着
して使用する部材であって、０℃以上のキュリー温度を
有するリング状磁性体の表面に、撥水性材料および導電
性金属を含む皮膜を形成してなる部材である。A snow melting member according to the present invention is a member mounted on a power transmission line to prevent ice and snow from adhering to the power transmission line, and has a ring shape having a Curie temperature of 0 ° C. or higher. It is a member formed by forming a film containing a water repellent material and a conductive metal on the surface of a magnetic body.
【００１１】この明細書において、「撥水性材料」とい
う用語は、水の接触角が９０度以上となる表面を形成す
ることができる材料を示す。In this specification, the term "water repellent material" refers to a material capable of forming a surface having a contact angle of water of 90 degrees or more.
【００１２】この発明において、撥水性材料には、たと
えば、フッ化物を用いることができ、好ましい撥水性材
料には、たとえば、フッ素樹脂等のフッ素を含有する有
機材料、およびフッ化黒鉛等がある。また、フッ素樹脂
は、たとえば、ポリテトラフルオロエチレン、ポリクロ
ロトリフルオロエチレン、テトラフルオロエチレンとエ
チレンの重合体およびポリフッ化ビニリデン等を含む。In the present invention, for example, a fluoride can be used as the water-repellent material, and preferable water-repellent materials include, for example, fluorine-containing organic materials such as fluororesin and fluorinated graphite. . Further, the fluororesin includes, for example, polytetrafluoroethylene, polychlorotrifluoroethylene, a polymer of tetrafluoroethylene and ethylene, polyvinylidene fluoride and the like.
【００１３】この発明において、リング状磁性体は、Ｆ
ｅ、Ｎｉ、Ｃｒ、Ｓｉ、Ｃｏ、Ｅｒ、Ｎｄ、Ｓｍ、Ｇ
ｄ、Ｄｙ、ＴｂおよびＡｌのうち少なくとも１つを含む
ものとすることができ、その中で好ましい磁性体には、
たとえば、Ｆｅ−Ｎｉ合金、希土類−遷移金属合金等が
ある。In the present invention, the ring-shaped magnetic material is F
e, Ni, Cr, Si, Co, Er, Nd, Sm, G
d, Dy, Tb and at least one of Al can be included, and among them, preferable magnetic materials include:
For example, there are Fe-Ni alloys, rare earth-transition metal alloys, and the like.
【００１４】リング状磁性体の形状は、その中に送電線
を通すことができるよう環状になっていれば特に限定さ
れるものではないが、たとえば、円環状またはドーナツ
状のものが好ましい。この発明に従う融雪部材は、この
リング内に送電線を通すことによって送電線に装着され
る。The shape of the ring-shaped magnetic body is not particularly limited as long as it has an annular shape so that a power transmission line can be passed through it. For example, an annular shape or a donut shape is preferable. The snow melting member according to the present invention is attached to the power transmission line by passing the power transmission line through the ring.
【００１５】この発明において、皮膜に含有される導電
性金属は、たとえば、Ｃｕ、Ａｌ、Ｆｅ、ＣｏおよびＮ
ｉからなる群から選択される少なくとも１つとすること
ができる。このような導電性金属は、電気めっき、また
は無電解めっき等によって、撥水性材料とともに磁性体
に付着させることができる。In the present invention, the conductive metal contained in the film is, for example, Cu, Al, Fe, Co or N.
It can be at least one selected from the group consisting of i. Such a conductive metal can be attached to the magnetic material together with the water-repellent material by electroplating, electroless plating, or the like.
【００１６】[0016]
【発明の作用効果】この発明に従うリング状の磁性体
は、０℃以上のキュリー温度を有するため、少なくとも
０℃（水の融点）以下においては、強磁性体であり、送
電線が発生する交番磁界によって発熱して氷雪を溶かす
ように働く。Since the ring-shaped magnetic body according to the present invention has a Curie temperature of 0 ° C. or higher, it is a ferromagnetic body at least at 0 ° C. (melting point of water) or lower, and an alternating line generating a power line. The magnetic field generates heat and acts to melt ice and snow.
【００１７】交番磁界による発熱の原因としては、ヒス
テリシス損失、渦電流損失および残留損失がある。ヒス
テリシス損失は、交番磁界中で磁性体が磁化する過程で
損失するエネルギに対応し、磁化が一周するエネルギで
表わされる。ヒステリシス損失は、外部磁界に比例する
のは言うまでもないが、材料の磁化率が大きければ損失
量が大きい。The causes of heat generation due to the alternating magnetic field include hysteresis loss, eddy current loss and residual loss. The hysteresis loss corresponds to the energy lost in the process of magnetizing the magnetic body in the alternating magnetic field, and is represented by the energy that the magnetization makes one round. Needless to say, the hysteresis loss is proportional to the external magnetic field, but if the magnetic susceptibility of the material is large, the loss amount is large.
【００１８】しかしながら、送電線によって形成される
交番磁界の大きさは、高々数エルステッド程度であり一
般の磁性体では磁気的に飽和に達しておらず、いわゆる
レイリーループの範囲内である。However, the magnitude of the alternating magnetic field formed by the power transmission line is at most about several oersteds, which is not magnetically saturated in a general magnetic body, and is within the range of the so-called Rayleigh loop.
【００１９】レイリーループ内では保磁力の効果は小さ
く、発熱量は交番磁界の周波数と透磁率にのみ依存する
が、５０〜６０Ｈｚの送電線を考慮した場合、発熱量は
かなり小さい。In the Rayleigh loop, the effect of coercive force is small, and the calorific value depends only on the frequency and magnetic permeability of the alternating magnetic field, but the calorific value is considerably small when the transmission line of 50 to 60 Hz is considered.
【００２０】したがって、レイリーループ内での発熱
は、渦電流損失が特に重要となる。渦電流は、磁性体が
磁化されるとき電磁誘導則によって磁性体内部に磁化を
妨げるよう流れる電流である。渦電流の大きさは磁性体
の形や磁化機構によっても異なるが、一般には、磁性体
の透磁率に比例し、導電率に反比例する。Therefore, for heat generation in the Rayleigh loop, the eddy current loss becomes particularly important. The eddy current is a current that flows inside the magnetic body when the magnetic body is magnetized so as to prevent the magnetization due to the electromagnetic induction law. The magnitude of the eddy current varies depending on the shape of the magnetic substance and the magnetization mechanism, but is generally proportional to the magnetic permeability of the magnetic substance and inversely proportional to the electrical conductivity.
【００２１】また、送電線により形成される磁束は、磁
性材料の中に深く侵入することはなく、いわゆるｓｋｉ
ｎ ｄｅｐｔｈ（表皮厚）と呼ばれる磁性材料の表層部
分にしか侵入しない。この点から、渦電流損失による発
熱に寄与する磁性材料の厚さはごく一部分である。Further, the magnetic flux formed by the power transmission line does not penetrate deeply into the magnetic material, and is a so-called ski.
It penetrates only into the surface layer portion of the magnetic material called n depth (skin depth). From this point, the thickness of the magnetic material that contributes to the heat generation due to the eddy current loss is very small.
【００２２】そこで、この発明に従う融雪部材では、高
導電性の金属を磁性体表面に付着させることにより、渦
電流損失をさらに発生させ、発熱量を向上させている。Therefore, in the snow melting member according to the present invention, a highly conductive metal is adhered to the surface of the magnetic material to further generate an eddy current loss and improve the amount of heat generation.
【００２３】さらに、この発明において高導電性金属に
撥水性の高い材料を複合させて形成した皮膜は、水をは
じきやすい。したがって、融雪の結果生成する水滴は、
この皮膜で覆われる部材表面から効果的に除去される。
また、撥水性材料の微粒子が皮膜の表面に存在するた
め、送電線に通電しない状態でも、降雪量が少ない場合
は着雪を防ぐことができる。Further, in the present invention, the film formed by combining a highly conductive metal with a material having a high water repellency easily repels water. Therefore, the water droplets generated as a result of snow melting are
It is effectively removed from the surface of the member covered with this film.
Further, since the fine particles of the water-repellent material are present on the surface of the film, snow can be prevented even when the power transmission line is not energized when the amount of snowfall is small.
【００２４】このように本発明は、発熱効果を向上させ
て融雪をより効果的に行なうのみならず、融雪により形
成した水を効率よくその表面から排除して着雪が起こり
にくい融雪部材となっている。As described above, the present invention not only improves the effect of heat generation to more effectively perform snow melting, but also efficiently removes water formed by the snow melting from the surface of the snow melting member to prevent snow accretion. There is.
【００２５】[0025]
【実施例】実施例１ キュリー温度が２５０℃のＦｅ−Ｎｉ１４％を外径３０
ｍｍ、内径２５ｍｍ、幅１０ｍｍのリング状に加工し
た。EXAMPLES Example 1 Fe—Ni 14% with a Curie temperature of 250 ° C. is used to have an outer diameter of 30.
mm, inner diameter 25 mm, width 10 mm.
【００２６】一方、酒石酸ナトリウム２０ｇ／ｌ、次亜
リン酸ナトリウム２ｇ／ｌ、硫酸ニッケル２３０ｇ／ｌ
およびラウリン酸ナトリウム１ｇ／ｌを含有する水溶液
に公称粒径１μｍのフッ化黒鉛粉末を２０ｇ／ｌの濃度
で分散させ、共析めっき液を調製した。On the other hand, sodium tartrate 20 g / l, sodium hypophosphite 2 g / l, nickel sulfate 230 g / l
A fluorinated graphite powder having a nominal particle size of 1 μm was dispersed at a concentration of 20 g / l in an aqueous solution containing 1 g / l of sodium laurate and a eutectoid plating solution.
【００２７】調製しためっき液を８０℃に加温し、上記
Ｆｅ−Ｎｉ１４％のリングをこのめっき液に浸漬するこ
とにより、１μｍの厚さで共析めっきを行なった。The prepared plating solution was heated to 80 ° C., and the Fe—Ni 14% ring was immersed in this plating solution to carry out eutectoid plating to a thickness of 1 μm.
【００２８】以上のようにして作成したリング状の融雪
部材を図１に示す。図１（ａ）に示すように、リング状
融雪部材１は、円環状であり、該部材の断面は図１
（ｂ）に示すとおりで、リング状融雪部材１において、
Ｆｅ−Ｎｉ１４％からなる磁性体２の表面には、ニッケ
ルとフッ化黒鉛が混在する皮膜３が形成されている。FIG. 1 shows the ring-shaped snow melting member produced as described above. As shown in FIG. 1A, the ring-shaped snow melting member 1 has an annular shape, and the cross section of the member is as shown in FIG.
As shown in (b), in the ring-shaped snow melting member 1,
A coating 3 containing nickel and fluorinated graphite is formed on the surface of the magnetic body 2 made of Fe-Ni 14%.
【００２９】また、図２に示すように、リング状部材１
は、そのリング内に送電線４が通されて使用される。Further, as shown in FIG. 2, the ring-shaped member 1
Is used by passing the power transmission line 4 through the ring.
【００３０】以上のように構成されるリング状融雪部材
をＡＣＳＲ８１０ｍｍ2 に図２に示すようにして装着し
た。気温１．５℃、風速０〜３ｍ／分、降雪量５ｍｍ／
Ｈｒの気象下で、電線に１００Ａの通電を行なったとこ
ろ、この部材は融雪を完全に遂行した。また、融雪した
結果生じる水滴も排除されており、リング表面には確認
できなかった。さらに、電線に通電を行なわない状態で
も、気温０．５℃、風速３ｍ／分、降雪量３ｍｍ／Ｈｒ
の気象下で、着雪現象は見られなかった。The ring-shaped snow melting member constructed as described above was mounted on ACSR 810 mm 2 as shown in FIG. Air temperature 1.5 ° C, wind speed 0-3m / min, snowfall 5mm /
When electric current of 100 A was applied to the electric wire under Hr weather, this member completely melted snow. In addition, water droplets resulting from the melting of snow were also removed, and it was not possible to confirm on the ring surface. Furthermore, even when the electric wire is not energized, the temperature is 0.5 ° C, the wind speed is 3 m / min, and the snowfall is 3 mm / Hr.
No snow accretion was observed under the weather.
【００３１】実施例２ キュリー温度が８０℃のＤｙ−Ｃｏ焼結体を外径３０ｍ
ｍ、内径２５ｍｍ、幅１０ｍｍのリング状に加工した。Example 2 A Dy-Co sintered body having a Curie temperature of 80 ° C. was prepared to have an outer diameter of 30 m.
m, an inner diameter of 25 mm, and a width of 10 mm.
【００３２】一方、硫酸ニッケル７水和物３２０ｇ／
ｌ、塩化ニッケル６水和物２０ｇ／ｌ、硫酸第１鉄７水
和物１８ｇ／ｌ、硼酸３０ｇ／ｌ、ステアリン酸ナトリ
ウム１ｇ／ｌ、および公称粒径２μｍのテトラフルオロ
エチレン粉末２０ｇ／ｌを含有するめっき液中で、電流
密度１Ａ／ｄｍ2 、浴温５５℃においてＤｙ−Ｃｏ焼結
体のＦｅ−Ｎｉめっきを５０μｍの厚さで行なった。On the other hand, nickel sulfate heptahydrate 320 g /
1, nickel chloride hexahydrate 20 g / l, ferrous sulfate heptahydrate 18 g / l, boric acid 30 g / l, sodium stearate 1 g / l, and tetrafluoroethylene powder 20 g / l with a nominal particle size of 2 μm In the contained plating solution, Fe-Ni plating of the Dy-Co sintered body was performed at a current density of 1 A / dm 2 and a bath temperature of 55 ° C. to a thickness of 50 μm.
【００３３】以上のようにして作成したリング状の融雪
部材をＡＣＳＲ８１０ｍｍ2 に環設した。気温１．５
℃、風速０〜３ｍ／分、降雪量５ｍｍ／Ｈｒの気象下
で、電線に１００Ａの通電を行なったところ、該部材は
融雪を完全に遂行した。また、融雪した結果生じる水滴
もリング上には見られなかった。さらに、電線に通電を
行なわない状態でも、気温０．５℃、風速３ｍ／分、降
雪量３ｍｍ／Ｈｒの気象下で、着雪現象は見られなかっ
た。The ring-shaped snow-melting member produced as described above was installed around ACSR 810 mm 2 . Temperature 1.5
When the electric wire was energized at 100 A under a weather condition of ℃, wind speed of 0 to 3 m / min, and snowfall amount of 5 mm / Hr, the member completely melted snow. In addition, water droplets resulting from the melting of snow were not seen on the ring. Further, even when the electric wire was not energized, no snow accretion phenomenon was observed under a temperature of 0.5 ° C., a wind speed of 3 m / min, and a snowfall of 3 mm / Hr.
【図１】この発明に従う融雪部材の一具体例を示す
（ａ）斜視図、および（ｂ）断面図である。FIG. 1A is a perspective view and FIG. 1B is a sectional view showing a specific example of a snow melting member according to the present invention.
【図２】この発明に従う融雪部材を電線に取付けた状態
を示す斜視図である。FIG. 2 is a perspective view showing a state in which the snow melting member according to the present invention is attached to an electric wire.
１ リング状融雪部材 ２ 磁性体 ３ 皮膜 ４ 送電線 1 Ring-shaped snow melting member 2 Magnetic material 3 Film 4 Transmission line
Claims (3)
記送電線に装着して使用する融雪部材であって、 ０℃以上のキュリー温度を有するリング状磁性体の表面
に、撥水性材料および導電性金属を含む皮膜を形成して
なる、融雪部材。1. A snow-melting member used by being attached to a power transmission line to prevent ice and snow from adhering to the power transmission line, wherein a surface of a ring-shaped magnetic body having a Curie temperature of 0 ° C. or higher has a water-repellent material. And a snow-melting member formed by forming a film containing a conductive metal.
っきの少なくともいずれかにより、撥水性材料ととも
に、Ｃｕ、Ａｌ、Ｆｅ、ＣｏおよびＮｉのうち少なくと
もいずれかを含有させて形成されたものである、請求項
１に記載の融雪部材。2. The film is formed by containing at least one of Cu, Al, Fe, Co and Ni together with a water repellent material by at least one of electroplating and electroless plating. The snow melting member according to claim 1.
機材料およびフッ化黒鉛の少なくともいずれかである、
請求項１に記載の融雪部材。3. The water repellent material is at least one of an organic material containing fluorine and fluorinated graphite.
The snow melting member according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4085442A JPH05292639A (en) | 1992-04-07 | 1992-04-07 | Snow melting member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4085442A JPH05292639A (en) | 1992-04-07 | 1992-04-07 | Snow melting member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05292639A true JPH05292639A (en) | 1993-11-05 |
Family
ID=13858989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4085442A Withdrawn JPH05292639A (en) | 1992-04-07 | 1992-04-07 | Snow melting member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05292639A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013236477A (en) * | 2012-05-09 | 2013-11-21 | Viscas Corp | Snow melting ring |
-
1992
- 1992-04-07 JP JP4085442A patent/JPH05292639A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013236477A (en) * | 2012-05-09 | 2013-11-21 | Viscas Corp | Snow melting ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990608 |