JPH11266521A - Power cable joint and its forming method - Google Patents
Power cable joint and its forming methodInfo
- Publication number
- JPH11266521A JPH11266521A JP10088204A JP8820498A JPH11266521A JP H11266521 A JPH11266521 A JP H11266521A JP 10088204 A JP10088204 A JP 10088204A JP 8820498 A JP8820498 A JP 8820498A JP H11266521 A JPH11266521 A JP H11266521A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- conductor
- diameter
- insulator
- insulator unit
- 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.)
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- Processing Of Terminals (AREA)
- Cable Accessories (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は拡径した絶縁体ユニ
ットを用いる電力ケーブル接続部とその形成方法とに関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power cable connecting portion using an insulator unit having an enlarged diameter and a method for forming the same.
【0002】[0002]
【従来の技術】図6はプラスチック電力ケーブルの差込
式接続部の一例の縦断面図である。 一般に、プラスチック電力ケーブルは中心から順に導体
21,内部半導電層,架橋ポリエチレン等の絶縁体22,外
部半導電層23,金属遮蔽層を具え、最も外側にはポリエ
チレンや塩化ビニル等のプラスチックシースを具えてい
る。各ケーブルの端部は、導体21,絶縁体22および外部
半導電層23が段階的に露出され、このうち導体21をスリ
ーブ等により圧縮して導体接続部24が形成されている。2. Description of the Related Art FIG. 6 is a longitudinal sectional view showing an example of a plug-in connection portion of a plastic power cable. Generally, plastic power cables have conductors in order from the center.
21, an inner semiconductive layer, an insulator 22, such as cross-linked polyethylene, an outer semiconductive layer 23, and a metal shielding layer. The outermost part is provided with a plastic sheath such as polyethylene or vinyl chloride. At the end of each cable, the conductor 21, the insulator 22, and the outer semiconductive layer 23 are exposed in a stepwise manner, and the conductor 21 is compressed by a sleeve or the like to form a conductor connection portion 24.
【0003】そして、この導体接続部24の外周に絶縁体
ユニット25がはめ込まれている。これは、外周側の外部
半導電層26と内周側の内部半導電層27および絶縁ゴム部
28とを一体に成形したものである。絶縁体ユニット25は
その内径がケーブル絶縁体22の外径より小さいため、ケ
ーブル絶縁体上に装着するには拡径用治具(図示せず)
を用いる。まず、拡径用治具を絶縁体ユニット25の内径
部に挿入して直径方向に絶縁体ユニット25を拡径する。
次に、拡径した絶縁体ユニット25を一方のケーブルには
め込んで一旦逃しておき、導体21の接続を行う。そし
て、拡径した絶縁体ユニット25を導体接続部24の外側に
位置決めし、拡径用治具を引抜くことにより、絶縁体ユ
ニット25の収縮による締付力でケーブル絶縁体上に密着
させて装着する。[0005] An insulator unit 25 is fitted around the outer periphery of the conductor connection portion 24. This is because the outer semiconductive layer 26 on the outer peripheral side, the inner semiconductive layer 27 on the inner peripheral side, and the insulating rubber part
28 is integrally formed. Since the inner diameter of the insulator unit 25 is smaller than the outer diameter of the cable insulator 22, a jig for expanding the diameter (not shown) is required for mounting on the cable insulator.
Is used. First, the diameter increasing jig is inserted into the inner diameter portion of the insulator unit 25 to expand the diameter of the insulator unit 25 in the diameter direction.
Next, the insulator unit 25 whose diameter has been increased is fitted into one of the cables and once escaped, and the conductor 21 is connected. Then, the expanded insulator unit 25 is positioned outside the conductor connection portion 24, and the jig for diameter expansion is pulled out, so that the insulating unit 25 is brought into close contact with the cable insulator by the tightening force due to the contraction of the insulator unit 25. Installing.
【0004】このように、絶縁体ユニットはそれ自体の
収縮による締付力のみでケーブル絶縁体との界面におけ
る密着性を達成するという作用をもつ。この締付力は拡
径率が増加すると絶縁体ユニットの締付力が低下するた
め小さくなることが知られており、接続部の信頼性確保
のためには拡径率をできるだけ抑える必要がある。[0004] As described above, the insulator unit has the effect of achieving the close contact at the interface with the cable insulator only by the tightening force due to the contraction of itself. It is known that the tightening force decreases as the diameter expansion ratio increases because the tightening force of the insulator unit decreases, and it is necessary to suppress the diameter expansion ratio as much as possible to secure the reliability of the connection portion. .
【0005】[0005]
【発明が解決しようとする課題】しかし、拡径した絶縁
体ユニットをプラスチックシース上に逃がすにはシース
外径以上に絶縁体ユニットの内径を拡径する必要があ
る。通常、ケーブルの曲がりなどを考慮すれば、余裕を
みてより大きく拡径する必要がある。また、拡径率をで
きるだけ抑えるためにはケーブルの直線性を確保した
り、拡径した絶縁体ユニットをケーブルコア(導体から
外部半導電層まで)上に逃がす必要がある。この逃がし
代を形成するにはプラスチックシース(図示せず)をは
ぎ取らなければならない。プラスチックシースをはぎ取
った部分は別途シースの復元が必要となり、接続部全長
はプラスチックシースのはぎ取り部を含めて長いものに
なる。ところが一般に送電用のプラスチック電力ケーブ
ルは地下の管路に敷設されており、接続作業は地下の限
られたスペースで行うことが必要で、接続部全長は可能
な限り短いものが望ましい。However, in order to release the expanded insulator unit onto the plastic sheath, it is necessary to increase the inner diameter of the insulator unit beyond the outer diameter of the sheath. Normally, it is necessary to increase the diameter of the cable in consideration of the bend of the cable. Further, in order to suppress the diameter expansion rate as much as possible, it is necessary to ensure the linearity of the cable and to release the expanded insulator unit onto the cable core (from the conductor to the external semiconductive layer). To form this relief, the plastic sheath (not shown) must be stripped. The portion where the plastic sheath has been stripped requires a separate restoration of the sheath, and the total length of the connecting portion is long including the stripped portion of the plastic sheath. However, generally, plastic power cables for power transmission are laid in underground conduits, and connection work needs to be performed in a limited space underground, and it is desirable that the total length of the connection portion be as short as possible.
【0006】従って、本発明の主目的は、絶縁体ユニッ
トの拡径率を抑えると共に拡径した絶縁体ユニットの逃
がし代を短縮して接続部自体も短縮できる電力ケーブル
接続部とその形成方法とを提供することにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a power cable connecting portion and a method of forming the power cable connecting portion capable of suppressing the diameter expansion rate of the insulator unit, shortening the escape allowance of the expanded insulator unit and shortening the connection portion itself. Is to provide.
【0007】[0007]
【課題を解決するための手段】本発明は上記の課題を解
消するもので、その特徴は、雌端子と雄端子との係合に
より接続された導体接続部と、導体接続部上を覆う拡径
式絶縁体ユニットとを具える電力ケーブル接続部にあ
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is characterized by a conductor connecting portion connected by engagement of a female terminal and a male terminal, and an expanded portion covering the conductor connecting portion. At a power cable connection comprising a radial insulator unit.
【0008】ここで、導体接続部にはチューリップコン
タクトまたはマルチバンドを用いることが好ましい。ま
た、雄端子とケーブル絶縁層との間または雌端子とケー
ブル絶縁層との間を連結するシュリンクバック機構を設
けることが望ましい。Here, it is preferable to use a tulip contact or a multi-band for the conductor connection portion. Further, it is desirable to provide a shrink-back mechanism for connecting between the male terminal and the cable insulating layer or between the female terminal and the cable insulating layer.
【0009】一方、上記の接続部を形成するのに最適な
本発明方法は、拡径パイプで拡径した絶縁体ユニットを
所定位置に配置する工程と、この絶縁体ユニットを移動
することなく内部にケーブルを挿入し、雄端子と雌端子
の係合によりケーブルの導体を接続する工程と、拡径パ
イプを除去して絶縁体ユニットで導体接続部の上を覆う
工程とを具えることを特徴とする。On the other hand, the method of the present invention, which is most suitable for forming the above-mentioned connection portion, comprises a step of arranging an insulator unit having a diameter increased by a diameter-expanding pipe at a predetermined position; A step of inserting a cable into the cable and connecting the conductor of the cable by engaging the male terminal and the female terminal, and a step of removing the expanded pipe and covering the conductor connection portion with an insulator unit. And
【0010】[0010]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。図1は導体を接続する前の状態を示す本発明接続
部の形成方法の説明図、図2は導体を接続した後の状態
を示す本発明接続部の形成方法の説明図である。本発明
接続部は拡径式絶縁体ユニット1を用いると共に、導体
接続を雌雄端子2A,2B,3の係合により行うことで絶縁体
ユニット1を逃がすことなく接続部を形成する。Embodiments of the present invention will be described below. FIG. 1 is an explanatory diagram of a method of forming a connecting portion of the present invention before connecting a conductor, and FIG. 2 is an explanatory diagram of a method of forming a connecting portion of the present invention showing a condition after connecting a conductor. The connecting portion of the present invention uses the expanded-diameter insulator unit 1 and forms a connection portion without escape of the insulator unit 1 by engaging the conductors by engaging the male and female terminals 2A, 2B and 3.
【0011】まず、図6で説明したものと同様の絶縁体
ユニット1の内径部に拡径用治具4を挿入して内径を拡
張する。拡径用治具4は、例えば軸方向に2分割できる
と共に、さらに各々が径方向にも2分割できるものを用
いる。拡径する程度は、絶縁体ユニット1の内径をケー
ブルコア(導体から外部半導電層まで)の外径よりも若
干大きい程度とする。First, the inner diameter is expanded by inserting a diameter increasing jig 4 into the inner diameter portion of the insulator unit 1 similar to that described with reference to FIG. As the diameter-enlargement jig 4, for example, a jig that can be divided into two in the axial direction and further each can be divided into two in the radial direction is used. The extent to which the diameter is increased is such that the inner diameter of the insulator unit 1 is slightly larger than the outer diameter of the cable core (from the conductor to the outer semiconductive layer).
【0012】接続するケーブルは、例えば中心から順に
導体5,内部半導電層,架橋ポリエチレン等の絶縁体
6,外部半導電層,金属遮蔽層を有し、最も外側にはポ
リエチレンや塩化ビニル等のプラスチックシースを具え
ている。接続する各ケーブルの端末は外部半導電層、絶
縁体6および導体5を段階的に露出させる。このとき、
各ケーブル端部においてシースをはぎ取る長さは絶縁体
ユニット1と拡径治具4とを合わせた長さの半分よりも
若干長い程度で良い。従来は拡径した絶縁体ユニット1
を一方のケーブルコア上に逃がしておくために、シース
をはぎ取る長さは当然絶縁体ユニットよりも長くなけれ
ばならなかった。本発明方法では、後述するように、拡
径した絶縁体ユニットをケーブルコア上に逃がす必要が
ないため、シースのはぎ取り長さを短縮することができ
る。The cable to be connected has, for example, a conductor 5, an inner semiconductive layer, an insulator such as cross-linked polyethylene 6, an outer semiconductive layer, and a metal shielding layer in order from the center. It has a plastic sheath. The end of each cable to be connected exposes the outer semiconductive layer, insulator 6 and conductor 5 stepwise. At this time,
The length at which the sheath is stripped off at each cable end may be slightly longer than half of the combined length of the insulator unit 1 and the diameter increasing jig 4. Conventionally, the insulator unit 1 whose diameter has been expanded
The length of stripping the sheath had to be longer than that of the insulator unit in order to allow the cable to escape onto one of the cable cores. In the method of the present invention, as described later, it is not necessary to release the insulator unit whose diameter has been increased onto the cable core, so that the stripping length of the sheath can be reduced.
【0013】上記のように拡径した絶縁体ユニット1を
ケーブル接続部の最終位置にセットする。そして、この
絶縁体ユニット1を軸方向に移動することなく内部にケ
ーブル端部を挿入して導体の接続を行う。この導体接続
には雌雄端子2A,2B,3を用いる。例えば、図1に示すよ
うに、先端が膨らんだ形状の雄端子2A,2B を各ケーブル
の導体5に圧縮などにより固定しておき、さらにこの一
方の雄端子2Aに雌端子3を差し込んで係合させておく。
雌端子3は両端部が開口した筒状のもので、雄端子2A,2
B の先端形状に対応した内周形状を具えている。そし
て、拡径された絶縁体ユニット1の両側から各ケーブル
を挿入し、他方のケーブルの雄端子2Bを既に一方のケー
ブル先端に取り付けられている雌端子3に差し込んで係
合することで接続する(図2)。なお、図1,2では雌
端子の両側から雄端子を差し込む場合を例として説明し
たが、雌端子を一方の導体に圧縮などで予め固定してお
き、他方の導体に雄端子を圧縮などで固定して、両雌雄
端子を係合させてもよい。The insulator unit 1 whose diameter has been increased as described above is set at the final position of the cable connection portion. Then, without connecting the insulator unit 1 in the axial direction, a cable end is inserted thereinto to connect the conductor. Male and female terminals 2A, 2B, 3 are used for this conductor connection. For example, as shown in FIG. 1, male terminals 2A and 2B having a bulged tip are fixed to the conductor 5 of each cable by compression or the like, and the female terminal 3 is inserted into one male terminal 2A to engage the cable. Let it match.
The female terminal 3 is a cylindrical one with both ends opened, and the male terminals 2A, 2
It has an inner peripheral shape corresponding to the tip shape of B. Then, each cable is inserted from both sides of the insulator unit 1 whose diameter has been increased, and the male terminal 2B of the other cable is inserted into and engaged with the female terminal 3 already attached to one of the cable ends. (FIG. 2). In FIGS. 1 and 2, the case where the male terminal is inserted from both sides of the female terminal has been described as an example. However, the female terminal is fixed to one conductor in advance by compression or the like, and the male terminal is compressed to the other conductor by compression or the like. Alternatively, both male and female terminals may be engaged.
【0014】ここで、両ケーブル導体の接続にはチュー
リップコンタクトやマルチバンドを用いることができ
る。図3はチューリップコンタクトの一例を示す断面図
である。ケーブル導体5の先端には雄端子2Aが取り付け
られ、雄端子の係合突起7をチューリップコンタクト8
にはめ込むことで、機械的接続と共に電気的接続をも行
っている。一方、図4はマルチバンドを用いて接続を行
った一例の断面図である。この場合は導体5に固定され
た雄端子2Aの外周突起9をケーブル挿通部の内周突起10
に係合させることで機械的接続を行い、雄端子先端の外
周に設けられたマルチバンド11により電気的接続を行っ
ている。Here, a tulip contact or a multi-band can be used to connect both cable conductors. FIG. 3 is a sectional view showing an example of a tulip contact. The male terminal 2A is attached to the tip of the cable conductor 5, and the male terminal engaging projection 7 is connected to the tulip contact 8
The electrical connection as well as the mechanical connection is made by fitting the cable. On the other hand, FIG. 4 is a cross-sectional view of an example in which connection is made using multiband. In this case, the outer protrusion 9 of the male terminal 2A fixed to the conductor 5 is connected to the inner protrusion 10 of the cable insertion portion.
The electrical connection is performed by the multiband 11 provided on the outer periphery of the tip of the male terminal.
【0015】さらに、この接続部にはシュリンクバック
対策を講じることが好ましい。図5はケーブル絶縁体6
と雄端子2Aとの間に引留治具12を装着した状態を示す断
面図である。露出された絶縁体端部の外周面に切欠溝13
を形成し、さらに雄端子の外周にも切欠溝14を形成して
おく。そして、両端部に内周突起を有する筒状の引留治
具12を各切欠溝13,14 にはめ込むことで絶縁体6と雄端
子2Aとを連結する。これにより、ケーブル絶縁体が導体
接続部から離れる現象を抑制できるので、内部半導電層
27の全長を最小にでき、絶縁体ユニットの寸法およびケ
ーブル接続部寸法の小型化が図れる。Furthermore, it is preferable to take measures against shrink-back at this connection portion. FIG. 5 shows a cable insulator 6
FIG. 6 is a cross-sectional view showing a state where the retention jig 12 is mounted between the male terminal 2A and the male terminal 2A. Notch groove 13 on the outer peripheral surface of the exposed insulator end
And a notch groove 14 is also formed on the outer periphery of the male terminal. Then, the insulator 6 and the male terminal 2A are connected by fitting the tubular retaining jig 12 having the inner peripheral projections at both ends into the cutout grooves 13 and 14. As a result, the phenomenon that the cable insulator separates from the conductor connection portion can be suppressed.
27 can be minimized, and the dimensions of the insulator unit and the cable connection part can be reduced.
【0016】なお、図5では絶縁体と雄端子とを連結す
る引留治具を示したが、この代わりに絶縁体を雌端子と
を連結する引留治具を用いてもよい(図示せず)。すな
わち、雄端子の外周の切欠溝の代わりに、雌端子の外周
に切欠溝を形成しておいて、図5の引留治具と同様の引
留治具を両切欠溝にはめ込めば良い。Although FIG. 5 shows a drawing jig for connecting the insulator and the male terminal, a drawing jig for connecting the insulator to the female terminal may be used instead (not shown). . That is, instead of the cutout groove on the outer periphery of the male terminal, a cutout groove may be formed on the outer periphery of the female terminal, and a holding jig similar to the holding jig of FIG. 5 may be fitted into both notch grooves.
【0017】[0017]
【発明の効果】以上説明したように、本発明接続部およ
び形成方法によれば、形成過程において絶縁体ユニット
をケーブルコア上に逃がす必要がないため、シースをは
ぎ取って形成する逃がし代を短縮でき、接続部の長さを
短縮することができる。As described above, according to the connecting portion and the forming method of the present invention, it is not necessary to release the insulator unit onto the cable core in the forming process, so that the release allowance formed by stripping the sheath can be reduced. The length of the connecting portion can be reduced.
【0018】また、絶縁体ユニットはケーブルシースの
外径以上に拡径する必要がないため、拡径率も小さくで
き、絶縁体ユニットとケーブル絶縁体との界面性能の高
い接続部を形成することができる。特に、絶縁体ユニッ
トの拡径率が小さければ、絶縁体ユニットを拡径した状
態で出荷でき、接続部形成現場での拡径作業を省略でき
る。Further, since the diameter of the insulator unit does not need to be increased beyond the outer diameter of the cable sheath, the diameter expansion ratio can be reduced, and a connection portion having a high interface performance between the insulator unit and the cable insulator can be formed. Can be. In particular, if the diameter of the insulator unit is small, the insulator unit can be shipped in a state where the diameter of the insulator unit is expanded, and the work of expanding the diameter at the connection part forming site can be omitted.
【0019】さらに、シュリンクバック対策機構を設け
ることで、ケーブル絶縁体が導体接続部から離れる現象
を抑制できるので、絶縁体ユニットの寸法およびケーブ
ル接続部寸法の小型化が図れる。Further, by providing a shrink-back countermeasure mechanism, the phenomenon that the cable insulator separates from the conductor connection portion can be suppressed, so that the dimensions of the insulator unit and the cable connection portion can be reduced.
【図1】導体接続前の本発明接続部の形成方法の説明図
である。FIG. 1 is an explanatory view of a method for forming a connecting portion of the present invention before connecting a conductor.
【図2】導体接続後の本発明接続部の形成方法の説明図
である。FIG. 2 is an explanatory diagram of a method of forming a connection portion of the present invention after conductor connection.
【図3】チューリップコンタクトを用いた導体接続部の
断面図である。FIG. 3 is a sectional view of a conductor connecting portion using a tulip contact.
【図4】マルチバンドを用いた導体接続部の断面図であ
る。FIG. 4 is a cross-sectional view of a conductor connecting portion using a multi-band.
【図5】シュリンクバック対策機構を示す説明図であ
る。FIG. 5 is an explanatory view showing a shrinkback countermeasure mechanism.
【図6】差し込み式電力ケーブル接続部の部分断面図で
ある。FIG. 6 is a partial sectional view of a pluggable power cable connection.
1,25 絶縁体ユニット 2A,2B 雄端子 3 雌端子
4 拡径用治具 5 導体 6,22 絶縁体 7 外周突起 8 チュー
リップコンタクト 9 外周突起 10 内周突起 11 マルチバンド 12
引留治具 13,14 切欠溝 23 外部半導電層 24 導体接続部
26 外部半導電層 27 内部半導電層 28 絶縁ゴム部1,25 Insulator unit 2A, 2B Male terminal 3 Female terminal 4 Jig for diameter expansion 5 Conductor 6,22 Insulator 7 Outer protrusion 8 Tulip contact 9 Outer protrusion 10 Inner protrusion 11 Multiband 12
Retention jig 13,14 Notch groove 23 External semiconductive layer 24 Conductor connection
26 Outer semiconductive layer 27 Inner semiconductive layer 28 Insulation rubber
Claims (4)
た導体接続部と、 この導体接続部上を覆う拡径式絶縁体ユニットとを具え
ることを特徴とする電力ケーブル接続部。1. A power cable connection portion comprising: a conductor connection portion connected by engagement of a female terminal and a male terminal; and a diameter-insulating unit covering the conductor connection portion.
たはマルチバンドで構成することを特徴とする請求項1
記載の電力ケーブル接続部。2. A conductor connecting part comprising a tulip contact or a multi-band.
Power cable connection as described.
端子とケーブル絶縁層との間を連結するシュリンクバッ
ク機構を設けたことを特徴とする請求項1記載の電力ケ
ーブル接続部。3. The power cable connecting part according to claim 1, further comprising a shrink back mechanism for connecting between the male terminal and the cable insulating layer or between the female terminal and the cable insulating layer.
所定位置に配置する工程と、 この絶縁体ユニットを移動させることなく内部にケーブ
ルを挿入し、雄端子と雌端子の係合によりケーブルの導
体を接続する工程と、 拡径パイプを除去して絶縁体ユニットで導体接続部の上
を覆う工程とを具えることを特徴とする電力ケーブル接
続部の形成方法。4. A step of arranging an insulator unit having a diameter increased by a diameter-expanding pipe at a predetermined position, inserting a cable inside the insulator unit without moving the insulator unit, and engaging a male terminal and a female terminal. A method for forming a power cable connection portion, comprising: a step of connecting the conductors of the above; and a step of removing the expanded pipe and covering the conductor connection portion with an insulator unit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10088204A JPH11266521A (en) | 1998-03-16 | 1998-03-16 | Power cable joint and its forming method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10088204A JPH11266521A (en) | 1998-03-16 | 1998-03-16 | Power cable joint and its forming method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11266521A true JPH11266521A (en) | 1999-09-28 |
Family
ID=13936383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10088204A Pending JPH11266521A (en) | 1998-03-16 | 1998-03-16 | Power cable joint and its forming method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11266521A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021175333A (en) * | 2020-04-28 | 2021-11-01 | 昭和電線ケーブルシステム株式会社 | Cable connection part |
-
1998
- 1998-03-16 JP JP10088204A patent/JPH11266521A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021175333A (en) * | 2020-04-28 | 2021-11-01 | 昭和電線ケーブルシステム株式会社 | Cable connection part |
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