JPH0963381A - Suspended insulator - Google Patents
Suspended insulatorInfo
- Publication number
- JPH0963381A JPH0963381A JP21742795A JP21742795A JPH0963381A JP H0963381 A JPH0963381 A JP H0963381A JP 21742795 A JP21742795 A JP 21742795A JP 21742795 A JP21742795 A JP 21742795A JP H0963381 A JPH0963381 A JP H0963381A
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- head
- peripheral wall
- porcelain
- radius
- 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- Withdrawn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
- 239000012212 insulator Substances 0.000 title claims abstract description 70
- 230000002093 peripheral effect Effects 0.000 claims abstract description 20
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 6
- 239000000919 ceramic Substances 0.000 claims abstract description 6
- 239000000725 suspension Substances 0.000 claims description 28
- 230000000694 effects Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Insulators (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、頂壁および周壁を
有する中空円筒状の頭部を含み、周壁の内面および外面
にセラミック質のサンドが接着された磁器製の絶縁体
と、該絶縁体の頭部に対しセメントにより接合されたキ
ャップ金具およびピン金具とを具え、ピン金具が、絶縁
体の頭部内に位置すると共にアール面を有する大径端部
を含み、該アール面を、軸線方向引張荷重の作用下で絶
縁体頭部に対して半径方向の圧縮力を及ぼす配置とした
懸垂がいしに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porcelain insulator including a hollow cylindrical head having a top wall and a peripheral wall, and ceramic sand bonded to the inner and outer surfaces of the peripheral wall, and the insulator. A cap fitting and a pin fitting joined to the head of the body by cement, the pin fitting including a large-diameter end portion having a rounded surface located inside the head of the insulator, the rounded surface being the axis line. The present invention relates to a suspension insulator arranged to exert a compressive force in a radial direction on an insulator head under the action of a directional tensile load.
【０００２】[0002]
【従来の技術】上述した構成の懸垂がいしは、例えば特
開昭６３−２７１８３１号公報に開示されており、従来
既知である。このような懸垂がいしにおいて、大径端部
にアール面を有するピン金具（いわゆるＲピン）は、そ
の「くさび効果」によって生じる応力を拡散させて磁器
本体への応力の集中を緩和する機能を発揮するため、長
期強度に対する信頼性を向上するうえで有効であり、標
準がいしより例えば３３トン級の懸垂がいしに至るまで
広範に採用されている。しかるに、Ｒピンを有する懸垂
がいしは笠部欠損後の引張強度、いわゆる残留強度が必
ずしも十分に発現されない場合があり、これは欠損した
笠部破面に応力が加わって頭部への亀裂進展を助長する
ことが原因とされている。そのため、残留強度を向上す
るためには絶縁体の頭部寸法を増加せざるを得ないと考
えられていた。2. Description of the Related Art A suspension insulator having the above-mentioned structure is disclosed in, for example, Japanese Patent Laid-Open No. 63-271831 and is conventionally known. In such a suspension insulator, the pin fitting (so-called R pin) having a radiused surface at the large diameter end exerts the function of diffusing the stress generated by the "wedge effect" and relaxing the concentration of stress on the porcelain body. Therefore, it is effective in improving the reliability against long-term strength, and is widely adopted from standard insulators to suspension insulators of, for example, 33 ton class. However, a suspension insulator having an R pin may not always exhibit sufficient tensile strength after so-called cap portion loss, so-called residual strength. This is because stress is applied to the fractured cap portion fracture surface and crack propagation to the head occurs. It is said that it is promoted. Therefore, it has been considered that the head size of the insulator must be increased in order to improve the residual strength.
【０００３】なお、４０トン級以上の重量級懸垂がいし
となると、絶縁体頭部のさらなる大型化が必要となり、
従来のＲピン構成では頭部の高さを有効に活用すること
が困難となる。これに対応すべく複数のアール面を有す
る多段Ｒピンも提案されているが、多段Ｒピンは基本的
には単段Ｒピンの設計思想を踏襲したものである。[0004] In the case of a weight class suspension insulator of 40 tons or more, it is necessary to further increase the size of the insulator head,
With the conventional R pin configuration, it is difficult to effectively utilize the height of the head. A multi-stage R pin having a plurality of rounded surfaces has been proposed to cope with this, but the multi-stage R pin basically follows the design concept of the single-stage R pin.
【０００４】一般的に、Ｒピンのくさび効果を高めて懸
垂がいしの長期強度に対する信頼性を向上する観点から
はアール面の曲率半径を増加させ、頭部の広い範囲で荷
重を分担させて応力集中を緩和させる設計が望ましい
が、これとは対照的に、懸垂がいしの残留強度の見地か
らはアール面の曲率半径を減少させるのが効果的であ
る。すなわち、アール面の曲率半径を減少させることに
より荷重分担の範囲をキャップ内に留め、欠損部まで至
らないようにした場合には、笠部の欠損破面への荷重が
緩和されるため、破面に生じた亀裂の進展を遅延させる
ことが可能である。これにより、キャップ／ピン間の高
さを有効に活用できるため、懸垂がいしの残留強度が向
上するのである。しかし、アール面の曲率半径の減少に
伴ってピン金具のくさび効果が必然的に低下し、磁器の
所要引張破壊強度を達成するのが困難となる場合があ
る。Generally, from the viewpoint of enhancing the wedge effect of the R pin and improving the reliability of the suspension insulator with respect to long-term strength, the radius of curvature of the rounded surface is increased so that the load is shared in a wide range of the head and stress is increased. A design that reduces concentration is desirable, but in contrast, it is effective from the standpoint of the residual strength of the suspension insulator to reduce the radius of curvature of the rounded surface. In other words, if the radius of curvature of the rounded surface is reduced to keep the range of load sharing within the cap so that it does not reach the defective portion, the load on the defective fracture surface of the cap portion is relaxed, It is possible to delay the development of cracks in the surface. As a result, the height between the cap and the pin can be effectively utilized, and the residual strength of the suspension insulator is improved. However, as the radius of curvature of the rounded surface decreases, the wedge effect of the pin fitting inevitably decreases, and it may be difficult to achieve the required tensile breaking strength of the porcelain.
【０００５】したがって、絶縁体頭部寸法の増加を必要
とせずに、所要の磁器破壊強度および残留強度を同時に
発現させ得る懸垂がいしが待望されている。Therefore, there is a demand for a suspension insulator capable of simultaneously exhibiting required porcelain breaking strength and residual strength without requiring an increase in the size of the insulator head.
【０００６】[0006]
【発明が解決しようとする課題】本発明の課題は、上述
した要求を十分に満足することのできる懸垂がいしを提
案することにある。SUMMARY OF THE INVENTION An object of the present invention is to propose a suspension insulator which can sufficiently satisfy the above-mentioned requirements.
【０００７】この課題を解決するため、本発明は、頂壁
および周壁を有する中空円筒状の頭部を含み、周壁の内
面および外面にセラミック質のサンドが接着された磁器
製の絶縁体と、該絶縁体の頭部に対しセメントにより接
合されたキャップ金具およびピン金具とを具え、ピン金
具が、絶縁体の頭部内に位置すると共にアール面を有す
る大径端部を含み、該アール面を、軸線方向引張荷重の
作用下で絶縁体頭部に対して半径方向の圧縮力を及ぼす
配置とした懸垂がいしにおいて、ピン金具における大径
端部の外径Ｄと、アール面の曲率半径Ｒとの間に、次の
関係：Ｒ／Ｄ＝１．１〜１．３を満足させることを特徴
とするものである。In order to solve this problem, the present invention includes a hollow cylindrical head having a top wall and a peripheral wall, and an insulator made of porcelain in which ceramic sand is adhered to the inner surface and the outer surface of the peripheral wall, A cap fitting and a pin fitting joined to the head of the insulator by cement, the pin fitting including a large diameter end located in the head of the insulator and having a rounded surface; Is a suspension insulator in which a radial compressive force is exerted on the insulator head under the action of a tensile load in the axial direction, the outer diameter D of the large diameter end of the pin fitting and the radius of curvature R of the rounded surface are The following relationship: R / D = 1.1 to 1.3 is satisfied.
【０００８】本発明は、絶縁体頭部寸法の増加を必要と
せずに、所要の磁器破壊強度および残留強度を同時に発
現させ得る懸垂がいしの構成について鋭意検討を重ねた
結果、ピン金具における大径端部の外径Ｄと、アール面
の曲率半径Ｒとの寸法比Ｒ／Ｄが特に重要な役割を演じ
ていることを初めて知見し、この寸法比Ｒ／Ｄを１．１
〜１．３の範囲内で設定し、特に好適には約１．２とす
ることにより、所期の目的を確実に達成し得るとの新規
な認識に基づいて完成されたものである。In the present invention, as a result of earnest studies on the structure of a suspension insulator which can simultaneously exhibit the required porcelain breakdown strength and residual strength without requiring an increase in the size of the insulator head, the large diameter of the pin fitting has been found. For the first time, it was found that the dimensional ratio R / D between the outer diameter D of the end portion and the radius of curvature R of the rounded surface plays a particularly important role.
It has been completed based on the novel recognition that the intended purpose can be reliably achieved by setting the range within the range of to 1.3 and particularly preferably about 1.2.
【０００９】本発明の好適実施例においては、絶縁体頭
部における周壁内面が円筒面、頂壁内面が曲面であり、
周壁および頂壁の各内面が略四半円弧状のアール面で連
続的に接続されている。この場合、絶縁体頭部内面にお
けるアール面は頂壁内面の曲面よりも小さい曲率半径を
有する構成とする。このアール面の曲率半径は、例えば
８〜１０ｍｍとすることができる。In a preferred embodiment of the present invention, the inner surface of the peripheral wall of the insulator head is a cylindrical surface, and the inner surface of the top wall is a curved surface.
The inner surfaces of the peripheral wall and the top wall are continuously connected by a rounded surface having a substantially quarter arc shape. In this case, the rounded surface on the inner surface of the insulator head has a smaller radius of curvature than the curved surface of the inner surface of the top wall. The radius of curvature of this rounded surface can be set to 8 to 10 mm, for example.
【００１０】[0010]
【発明の実施の形態】以下、本発明を添付図面に示した
好適実施例に基づいて詳述する。図１に示す懸垂がいし
は磁器製の絶縁体１を具え、この絶縁体１の素地表面に
は既知の態様で釉薬が施されている。絶縁体１は、半径
方向外方に向けて延在するフランジ状の笠部２と、その
中央に配置されて上向きに突出する略円筒状の頭部３と
から構成されている。頭部３は、下端部において笠部２
に接続する略円筒状の周壁３ａと、周壁３ａの上端部に
連続する頂壁３ｂとを含んでいる。図２に示すように、
頭部３における周壁３ａの内面を円筒面、頂壁３ｂの内
面を曲面とし、周壁３ａおよび頂壁３ｂの各内面をアー
ル面３ｃで連続的に接続し、同アール面３ｃの曲率半径
Ｒc を頂壁３ｂ内面の曲率半径Ｒb よりも小とし、例え
ば８〜１０ｍｍとする。周壁３ａの内面および外面に
は、セラミック質のサンド４が接着されている。この場
合、周壁３ａの内面におけるサンド４の接着領域の上端
は、周壁３ａの円筒状内面とアール面３ｃとの接続位置
Ｔを基準として、その上方３ｍｍの位置よりも下側の領
域ΔＴ内に配置するのが好適である。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail with reference to the preferred embodiments shown in the accompanying drawings. The suspension insulator shown in FIG. 1 comprises an insulator 1 made of porcelain, and the surface of the base body of this insulator 1 is coated with glaze in a known manner. The insulator 1 is composed of a flange-shaped cap portion 2 extending outward in the radial direction, and a substantially cylindrical head portion 3 arranged in the center of the cap portion 2 and protruding upward. The head 3 has a cap 2 at the lower end.
And a top wall 3b continuous with the upper end of the peripheral wall 3a. As shown in FIG.
The inner surface of the peripheral wall 3a of the head 3 is a cylindrical surface, the inner surface of the top wall 3b is a curved surface, and the inner surfaces of the peripheral wall 3a and the top wall 3b are continuously connected by the rounded surface 3c, and the radius of curvature Rc of the rounded surface 3c is It is smaller than the radius of curvature Rb of the inner surface of the top wall 3b and is, for example, 8 to 10 mm. Ceramic sand 4 is adhered to the inner and outer surfaces of the peripheral wall 3a. In this case, the upper end of the adhesion region of the sand 4 on the inner surface of the peripheral wall 3a is within the region ΔT below the position 3 mm above the connection position T between the cylindrical inner surface of the peripheral wall 3a and the rounded surface 3c. It is preferable to arrange them.
【００１１】頭部３に対し、キャップ金具５が外面側
で、またピン金具６が内面側で、それぞれセメント７に
より接合されている。図３に示すように、ピン金具６
は、絶縁体１の頭部３内に位置すると共にアール面６ｂ
を有する大径の上端部６ａを具えている。このアール面
６ｂは、軸線方向引張荷重の作用下で絶縁体頭部３に対
して半径方向の圧縮力を及ぼす配置とされている。図３
における参照符号ｈは、キャップ／ピン間の実質的な有
効高さを表している。なお、ピン金具６の表面には溶融
亜鉛めっき等による金属めっき層が形成され、この金属
めっき層上に耐アルカリ性絶縁皮膜としてのビチューメ
ン塗料（bituminous paint）が塗布されている。さら
に、ピン金具６の上端面と頭部３における頂壁３ｂ内面
との間には、厚みが２〜３ｍｍの緩衝部材８が介挿され
ている。To the head 3, the cap fitting 5 is joined on the outer surface side, and the pin fitting 6 is joined on the inner surface side by cement 7. As shown in FIG. 3, the pin fitting 6
Is located in the head 3 of the insulator 1 and has a rounded surface 6b.
It has a large-diameter upper end portion 6a having. The rounded surface 6b is arranged to exert a compressive force in the radial direction on the insulator head 3 under the action of a tensile load in the axial direction. FIG.
The reference sign h in represents the effective effective height between the caps / pins. A metal plating layer is formed on the surface of the pin fitting 6 by hot dip galvanizing or the like, and a bituminous paint as an alkali resistant insulating film is applied on the metal plating layer. Further, a buffer member 8 having a thickness of 2 to 3 mm is inserted between the upper end surface of the pin fitting 6 and the inner surface of the top wall 3b of the head 3.
【００１２】上述した懸垂がいしの基本構成自体は前記
特開昭６３−１９３４１４号公報に開示されており、従
来既知である。絶縁体１における頭部周壁３ａの内面お
よび外面に接着するサンド４は、次の方法により製造す
るのが好適である。すなわち、先ず従来と同様にサンド
素地を調合し、フィルタープレスにより脱水して適度な
水分を含有するケーキとする。このケーキを土練機に投
入して混練し、孔径が１．８〜２．０ｍｍ程度の多数の
貫通孔を有する孔あき板から押し出してヌードル状の成
形体を得る。この成形体の直径は、目的とするサンドの
最大粒径と同じか、僅かに大きめとしておく。The basic construction itself of the above-mentioned suspension insulator is disclosed in the above-mentioned Japanese Patent Laid-Open No. 63-193414 and is conventionally known. The sand 4 adhered to the inner surface and the outer surface of the head peripheral wall 3a of the insulator 1 is preferably manufactured by the following method. That is, first, a sand substrate is prepared in the same manner as in the conventional case, and dehydrated by a filter press to obtain a cake containing an appropriate amount of water. This cake is put into a kneading machine and kneaded, and extruded from a perforated plate having a large number of through holes having a pore diameter of about 1.8 to 2.0 mm to obtain a noodle-shaped molded body. The diameter of this compact is the same as or slightly larger than the maximum grain size of the intended sand.
【００１３】次に、このヌードル状成形体を乾燥し、粗
砕機およびデシンター整粒機によって成形体の直径とほ
ぼ同径の粒状体に粉砕、整粒する。なお、デシンター整
粒機は、多数の透孔が設けられたドラムを回転させつつ
粉砕、整粒を行なう装置である。ドラムにおける透孔の
孔径は１．６〜１．８ｍｍ程度とし、また、ドラムの回
転数は通常の場合よりもはるかに低い２００ｒｐｍ程度
とするのが好適である。かくして得られた粒状体は、鋭
角的なエッジの少ない粒状体であり、上網が１．６８ｍ
ｍ、下網が０．８４〜１．０ｍｍの整粒篩にかけて選別
した上、さや詰めして焼成する。その後に焼成品をほぐ
し篩にかけてほぐし、鋭角的なエッジの少ないがいし用
サンドとして仕上げるのである。がいし用サンドの上記
粉砕製法については、例えば特公平６−５３６０１号公
報に詳述されているので、当該公報の記載も参照された
い。Next, the noodle-shaped molded product is dried, and then crushed and sized by a coarse crusher and a de-sinter sizing machine into granules having substantially the same diameter as the diameter of the molded product. The de-sinter sizing machine is a device for crushing and sizing while rotating a drum provided with a large number of through holes. It is preferable that the diameter of the through holes in the drum is about 1.6 to 1.8 mm, and the rotation speed of the drum is about 200 rpm, which is much lower than in the usual case. The granules thus obtained are granules with few sharp edges, and the upper net has a size of 1.68 m.
m, the lower net is 0.84 to 1.0 mm, and the powder is screened through a sieving sieve, and then squeezed and baked. After that, the fired product is disentangled through a disintegrating sieve and finished as an insulator sand with few sharp edges. The method for crushing the sand for insulators is described in detail in, for example, Japanese Patent Publication No. 6-53601, so refer to the description in that publication as well.
【００１４】本発明は、絶縁体頭部寸法の増加を必要と
せずに所要の磁器破壊強度および残留強度を同時に発現
させ得る懸垂がいしを実現させるうえで、ピン金具６に
おける大径端部６ａの外径Ｄと、アール面６ｂの曲率半
径Ｒとの寸法比Ｒ／Ｄが特に重要な役割を演じている点
に着目して、この寸法比Ｒ／Ｄの適正範囲を定めるもの
である。According to the present invention, in order to realize a suspension insulator capable of exhibiting required porcelain breaking strength and residual strength at the same time without requiring an increase in the size of the insulator head, the large-diameter end portion 6a of the pin metal fitting 6 is provided. Focusing on the fact that the dimensional ratio R / D between the outer diameter D and the radius of curvature R of the rounded surface 6b plays a particularly important role, the proper range of the dimensional ratio R / D is determined.
【００１５】図４は、ＩＥＣ規格Ｎｏ．３０５のＵ１２
０ＢＳに準拠する懸垂がいしにおいて、寸法比Ｒ／Ｄを
変化させたときの磁器の引張破壊強度および残留強度を
示すグラフである。このグラフにおいて、磁器の引張破
壊強度は母集団の平均値を保証強度に対して３σの裕度
を持たせた値を１００とし、また、残留強度は、母集団
の平均値を保証強度の６５％に対して１．６４５σの裕
度を持たせた値を１００としたものである。図４から明
らかなとおり、寸法比Ｒ／Ｄが１．１に満たない場合に
は満足すべき残留強度が達成される反面、磁器の引張破
壊強度が不十分となる傾向が認められる。他方、寸法比
Ｒ／Ｄが１．３を超える場合には満足すべき引張破壊強
度が達成される反面、残留強度が不十分となる傾向が認
められる。したがって、寸法比Ｒ／Ｄは１．１〜１．３
の範囲内で設定するのが好適であり、約１．２とするの
が特に望ましいことが明らかである。FIG. 4 shows the IEC standard No. 305 U12
It is a graph which shows the tensile fracture strength and the residual strength of porcelain when changing the dimension ratio R / D in the suspension insulator based on 0BS. In this graph, the tensile fracture strength of the porcelain is defined as 100, which is the average value of the population with a margin of 3σ with respect to the guaranteed strength, and the residual strength is the average value of the population of 65% of the guaranteed strength. The value obtained by giving a margin of 1.645σ to 100% is taken as 100. As is clear from FIG. 4, when the dimensional ratio R / D is less than 1.1, a satisfactory residual strength is achieved, but the tensile fracture strength of the porcelain tends to be insufficient. On the other hand, when the dimensional ratio R / D exceeds 1.3, satisfactory tensile fracture strength is achieved, but residual strength tends to be insufficient. Therefore, the dimensional ratio R / D is 1.1 to 1.3.
It is preferable to set within the range of, and it is clear that about 1.2 is particularly preferable.
【００１６】さらに、図５は、ＩＥＣ規格Ｎｏ．３０５
のＵ３００ＢＳに準拠する懸垂がいしにおいて、寸法比
Ｒ／Ｄを変化させたときの磁器の引張破壊強度および残
留強度を示すグラフである。このグラフにおいても、磁
器の引張破壊強度および残留強度は、いずれも前述と同
様の値を１００としたときのデータを示すものである。
図５から明らかなとおり、この懸垂がいしについても寸
法比Ｒ／Ｄが１．１に満たない場合には満足すべき残留
強度が達成される反面、引張破壊強度が不十分となる傾
向が認められる。他方、寸法比Ｒ／Ｄが１．３を超える
場合には満足すべき引張破壊強度が達成される反面、残
留強度が不十分となる傾向が認められる。したがって、
この場合においても寸法比Ｒ／Ｄは１．１〜１．３の範
囲内で設定するのが好適であり、約１．２とするのが特
に望ましいことが明らかである。Further, FIG. 305
7 is a graph showing the tensile breaking strength and residual strength of porcelain when the dimension ratio R / D is changed in the suspension insulator conforming to U300BS. Also in this graph, the tensile fracture strength and the residual strength of the porcelain both show data when the same values as above are set to 100.
As is clear from FIG. 5, even with this suspension insulator, when the dimension ratio R / D is less than 1.1, a satisfactory residual strength is achieved, but the tensile fracture strength tends to be insufficient. . On the other hand, when the dimensional ratio R / D exceeds 1.3, satisfactory tensile fracture strength is achieved, but residual strength tends to be insufficient. Therefore,
Even in this case, the dimensional ratio R / D is preferably set within the range of 1.1 to 1.3, and it is clear that it is particularly preferable to set it to about 1.2.
【００１７】上述した説明から明らかなとおり、本発明
によれば、ピン金具６における大径端部６ａの外径Ｄに
対するテーパ面６ｂの曲率半径Ｒの適正範囲を定めたこ
とにより、絶縁体頭部３の大型化を必要とせずに磁器の
所要引張破壊強度および残留強度を同時に発現し得る懸
垂がいしを実現することが可能となるものである。 な
お、上述した実施例は単なる例示に過ぎず、本発明を限
定するものではない。そして、本発明がその範囲内にお
いて種々の変形形態をもって実施し得ることは、言うま
でもない。As is apparent from the above description, according to the present invention, by setting the proper range of the radius of curvature R of the tapered surface 6b with respect to the outer diameter D of the large-diameter end 6a of the pin fitting 6, the insulator head is formed. It is possible to realize a suspension insulator that can simultaneously develop the required tensile breaking strength and residual strength of the porcelain without requiring an increase in the size of the portion 3. It should be noted that the above-described embodiments are merely examples and do not limit the present invention. Needless to say, the present invention can be implemented in various modifications within the scope.
【図１】本発明を好適に実施し得る懸垂がいしの正面図
であって、その半部を断面で示すものである。FIG. 1 is a front view of a suspension insulator to which the present invention can be suitably applied, showing a half portion thereof in cross section.
【図２】絶縁体頭部の内面形状を説明するための略図で
ある。FIG. 2 is a schematic diagram for explaining an inner surface shape of an insulator head.
【図３】本発明による懸垂がいしの要部拡大断面図であ
る。FIG. 3 is an enlarged sectional view of a main part of a suspension insulator according to the present invention.
【図４】保証強度が互いに異なる懸垂がいしにおいて、
それぞれ寸法比Ｒ／Ｄを変化させたときの磁器破壊強度
および残留強度を示すグラフである。[Fig. 4] In suspension insulators having different guarantee strengths,
It is a graph which shows porcelain destruction strength and residual strength when changing size ratio R / D, respectively.
【図５】保証強度が互いに異なる懸垂がいしにおいて、
それぞれ寸法比Ｒ／Ｄを変化させたときの磁器破壊強度
および残留強度を示すグラフである。FIG. 5: For suspension insulators having different guarantee strengths,
It is a graph which shows porcelain destruction strength and residual strength when changing size ratio R / D, respectively.
１ 磁器製の絶縁体、３ 中空円筒状頭部、３ａ 周
壁、４ セラミック質のサンド、５ キャップ金具、６
ピン金具、６ａ 大径端部、６ｂアール面、７ セメ
ント1 Porcelain Insulator, 3 Hollow Cylindrical Head, 3a Peripheral Wall, 4 Ceramic Sand, 5 Cap Metal Fitting, 6
Pin fitting, 6a large diameter end, 6b rounded surface, 7 cement
Claims (4)
を含み、周壁の内面および外面にセラミック質のサンド
が接着された磁器製の絶縁体と、該絶縁体の頭部に対し
セメントにより接合されたキャップ金具およびピン金具
とを具え、ピン金具が、絶縁体の頭部内に位置すると共
にアール面を有する大径端部を含み、該アール面を、軸
線方向引張荷重の作用下で絶縁体頭部に対して半径方向
の圧縮力を及ぼす配置とした懸垂がいしにおいて、ピン
金具における前記大径端部の外径Ｄと前記アール面の曲
率半径Ｒとの間に、次の関係： Ｒ／Ｄ＝１．１〜１．３ を満足させることを特徴とする懸垂がいし。1. A porcelain insulator including a hollow cylindrical head portion having a top wall and a peripheral wall, wherein ceramic sand is adhered to an inner surface and an outer surface of the peripheral wall, and a cement for the head portion of the insulator. A cap fitting and a pin fitting joined together by means of the pin fitting, the pin fitting including a large-diameter end portion having a rounded surface located in the head of the insulator, the rounded surface being subjected to an axial tensile load. In a suspension insulator arranged to exert a compressive force in the radial direction on the insulator head, the following relationship is established between the outer diameter D of the large-diameter end of the pin fitting and the radius of curvature R of the rounded surface. : A suspension insulator characterized by satisfying R / D = 1.1 to 1.3.
前記アール面の曲率半径Ｒとの間に、次の関係： Ｒ／Ｄ≒１．２ を満足させることを特徴とする、請求項１記載の懸垂が
いし。2. A pin metal fitting satisfying the following relationship between the outer diameter D of the large diameter end and the radius of curvature R of the rounded surface: R / D≈1.2. The suspension insulator according to claim 1.
面、頂壁内面が曲面であり、周壁および頂壁の各内面が
略四半円弧状のアール面で連続的に接続され、該アール
面が頂壁内面の曲面よりも小さい曲率半径を有すること
を特徴とする、請求項１または２に記載の懸垂がいし。3. The inner surface of the peripheral wall of the insulator head is a cylindrical surface, the inner surface of the top wall is a curved surface, and the inner surfaces of the peripheral wall and the top wall are continuously connected by a rounded surface having a substantially quarter arc shape. Has a radius of curvature smaller than the curved surface of the inner surface of the top wall.
率半径が、８〜１０ｍｍであることを特徴とする、請求
項３記載の懸垂がいし。4. The suspension insulator according to claim 3, wherein the radius of curvature of the rounded surface on the inner surface of the insulator head is 8 to 10 mm.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21742795A JPH0963381A (en) | 1995-08-25 | 1995-08-25 | Suspended insulator |
| CN 95223392 CN2246325Y (en) | 1995-08-25 | 1995-09-28 | Suspension insulator |
| CN95118202A CN1084030C (en) | 1995-08-25 | 1995-09-28 | Suspension insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21742795A JPH0963381A (en) | 1995-08-25 | 1995-08-25 | Suspended insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0963381A true JPH0963381A (en) | 1997-03-07 |
Family
ID=16704050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21742795A Withdrawn JPH0963381A (en) | 1995-08-25 | 1995-08-25 | Suspended insulator |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0963381A (en) |
| CN (2) | CN2246325Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013054943A (en) * | 2011-09-05 | 2013-03-21 | Railway Technical Research Institute | Insulator |
| CN115143890A (en) * | 2022-07-06 | 2022-10-04 | 中国电力科学研究院有限公司 | Insulator structure parameter measuring system and method based on three-dimensional scanning |
| CN115331901A (en) * | 2022-07-21 | 2022-11-11 | 中材江西电瓷电气有限公司 | Ceramic core composite insulator assembly and method of forming the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1848009B1 (en) * | 2006-04-20 | 2014-03-26 | ABB Technology Ltd | An elongated member and use thereof |
| JP6813524B2 (en) * | 2018-03-15 | 2021-01-13 | 日本碍子株式会社 | Suspended insulator |
| CN110954366B (en) * | 2019-12-25 | 2023-09-01 | 日照三奇医疗卫生用品有限公司 | Sampling device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62274510A (en) * | 1986-05-22 | 1987-11-28 | 日本碍子株式会社 | Suspension insulator |
| JPH0799653B2 (en) * | 1987-02-04 | 1995-10-25 | 日本碍子株式会社 | Suspension insulator |
| JP2568547B2 (en) * | 1987-04-28 | 1997-01-08 | 日本碍子株式会社 | Suspension insulator |
| CN1044005A (en) * | 1989-01-08 | 1990-07-18 | 全苏绝缘体和附属装置特种工艺设计局 | High voltage suspended insulator |
-
1995
- 1995-08-25 JP JP21742795A patent/JPH0963381A/en not_active Withdrawn
- 1995-09-28 CN CN 95223392 patent/CN2246325Y/en not_active Expired - Lifetime
- 1995-09-28 CN CN95118202A patent/CN1084030C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013054943A (en) * | 2011-09-05 | 2013-03-21 | Railway Technical Research Institute | Insulator |
| CN115143890A (en) * | 2022-07-06 | 2022-10-04 | 中国电力科学研究院有限公司 | Insulator structure parameter measuring system and method based on three-dimensional scanning |
| CN115331901A (en) * | 2022-07-21 | 2022-11-11 | 中材江西电瓷电气有限公司 | Ceramic core composite insulator assembly and method of forming the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1084030C (en) | 2002-05-01 |
| CN2246325Y (en) | 1997-01-29 |
| CN1133478A (en) | 1996-10-16 |
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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: 20021105 |