JP2014167848A - Connection structure and connection method of power cable - Google Patents

Connection structure and connection method of power cable Download PDF

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JP2014167848A
JP2014167848A JP2013038666A JP2013038666A JP2014167848A JP 2014167848 A JP2014167848 A JP 2014167848A JP 2013038666 A JP2013038666 A JP 2013038666A JP 2013038666 A JP2013038666 A JP 2013038666A JP 2014167848 A JP2014167848 A JP 2014167848A
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sleeve
aluminum
compression
power cable
conductor
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JP5794434B2 (en
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Naoto Shigemori
直登 茂森
Shinji Maruichi
真二 丸一
Hiroshi Niinobe
洋 新延
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Viscas Corp
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Viscas Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a connection structure, and the like, of a power cable ensuring excellent workability for a high voltage power cable having an aluminum conductor, and allowing a conductor to be gripped in a sleeve reliably.SOLUTION: At first, an insulating coating 6 at the end of power cables 10a, 10b is peeled by a predetermined length, and aluminum conductors 5a, 5b are exposed. Subsequently, the ends of the aluminum conductors 5a, 5b to be connected are inserted from both ends of a sleeve 1. Thereafter, in a state where the aluminum conductors 5a, 5b are inserted into both ends of the sleeve 1, a bolt 7 is inserted into a bolt hole 6. When fastening the bolt 7, the aluminum conductors 5a, 5b can be pressed by the tip of the bolt 7. Thereafter, a part of the outer periphery of the sleeve 1 is compressed along with the aluminum conductors 5a, 5b. Compression parts 9 are formed near both ends of the sleeve 1. The aluminum conductors 5a, 5b are gripped in the sleeve 1 by the compression parts 9.

Description

本発明は、アルミニウム導体を有する、特に高圧用の電力ケーブルの接続構造および接続方法に関するものである。   The present invention relates to a connection structure and a connection method for a power cable having an aluminum conductor, particularly for a high voltage.

電力ケーブルを長距離に亘って敷設する際には、複数の電力ケーブル同士が接続されて使用される。電力ケーブルの導体同士を接続する際には、圧縮スリーブが用いられる。   When laying a power cable over a long distance, a plurality of power cables are connected and used. When connecting the conductors of the power cable, a compression sleeve is used.

圧縮スリーブを用いて導体同士の接続を行う場合には、まず、導体の先端を圧縮スリーブの端部へ挿入する。この状態で、圧縮スリーブの外周から導体とともに圧縮スリーブを圧縮することで、導体と圧縮スリーブとが圧縮接続される。   When conductors are connected using a compression sleeve, first, the tip of the conductor is inserted into the end of the compression sleeve. In this state, the conductor and the compression sleeve are compressed and connected by compressing the compression sleeve together with the conductor from the outer periphery of the compression sleeve.

また、導体同士を接続する際には、ボルト孔を有するスリーブを用いる方法がある(例えば特許文献1、2)。導体がスリーブに挿入された状態で、スリーブの側面に形成されたボルト孔にボルトを締めこむことで、ボルトで導体を押圧し、スリーブに対する導通の確保と導体の把持を行うことができる。   Moreover, when connecting conductors, there exists a method of using the sleeve which has a bolt hole (for example, patent document 1, 2). By tightening the bolt into the bolt hole formed on the side surface of the sleeve in a state where the conductor is inserted into the sleeve, the conductor can be pressed with the bolt to ensure conduction to the sleeve and hold the conductor.

特開2005−293898号公報JP 2005-293898 A 特開2007−250483号公報JP 2007-250483 A

一方、高圧用の電力ケーブルの軽量化やコスト低減のため、従来使用されてきた銅導体に代えて、高圧用の電力ケーブルの分野においてもアルミニウム導体を使用することが検討されている。しかし、高圧用電力ケーブルのアルミニウム導体を、従来と同様の圧縮スリーブを用いて接続を行うと、アルミニウム導体への通電による温度変化によって、アルミニウム導体にクリープ変形が生じる恐れがある。このようなクリープ変形が生じると、スリーブとアルミニウム導体との接触面積が減少し、電気抵抗が増加する恐れがある。   On the other hand, in order to reduce the weight of a high-voltage power cable and reduce the cost, it has been studied to use an aluminum conductor in the field of a high-voltage power cable in place of the conventionally used copper conductor. However, if the aluminum conductor of the high-voltage power cable is connected using a compression sleeve similar to the conventional one, creep deformation may occur in the aluminum conductor due to a temperature change caused by energization of the aluminum conductor. When such creep deformation occurs, the contact area between the sleeve and the aluminum conductor decreases, and the electrical resistance may increase.

また、高圧用電力ケーブルは、地下等に敷設され、マンホール内などの限られた空間内で接続作業を行う必要がある。このため、この作業空間への圧縮装置の運搬や設置等が必要となる。特に、高圧用の電力ケーブルは外径が大きく、スリーブも大型化するため、このようなスリーブを一度に圧縮させるためには、大型・大重量の圧縮装置が必要となる。小型の圧縮装置によって複数回の圧縮作業を行うと、同じ条件での圧縮が困難となり、熟練の技術が必要となるからである。   The high-voltage power cable is laid in the basement or the like and needs to be connected in a limited space such as a manhole. For this reason, transportation, installation, etc. of the compression apparatus to this work space are needed. In particular, since the high-voltage power cable has a large outer diameter and a large sleeve, a large and heavy compression device is required to compress such a sleeve at a time. This is because when a compression operation is performed a plurality of times by a small compression device, compression under the same conditions becomes difficult and skillful techniques are required.

これに対し、特許文献2のように、ボルトによる接続は、クリープ変形の問題は小さいが、スリーブに対する把持力が小さいという問題がある。把持力を補うためにボルトを多くすると、作業性が悪くなる。また、多くしたボルトの分、スリーブを長くしなければならないが、マンホールの広さ等により、中間接続部の長さが制限され、これによりスリーブの長も制限されるため、ボルトを十分に増設することができない。   On the other hand, as in Patent Document 2, the connection by the bolt has a problem that the gripping force to the sleeve is small although the problem of creep deformation is small. If the number of bolts is increased in order to supplement the gripping force, workability deteriorates. In addition, the sleeve must be lengthened by the amount of bolts increased, but the length of the intermediate connection is limited by the size of the manhole, etc., which also limits the length of the sleeve. Can not do it.

本発明は、このような問題に鑑みてなされたもので、アルミニウム導体を有する高圧用の電力ケーブルに対して、作業性が優れ、確実に導体をスリーブに把持することが可能な電力ケーブルの接続構造等を提供することを目的とする。   The present invention has been made in view of such a problem, and it is superior in workability to a high-voltage power cable having an aluminum conductor, and the connection of the power cable that can reliably hold the conductor to the sleeve The purpose is to provide a structure and the like.

前述した目的を達成するため、第1の発明は、アルミニウム導体を有する電力ケーブルの接続構造であって、側面に雌ねじ部を有する孔が形成される略筒状のスリーブが用いられ、前記スリーブの両側から一対の前記アルミニウム導体の先端が挿入され、前記スリーブの一部が圧縮されてそれぞれの前記アルミニウム導体と前記スリーブとが圧着されるとともに、前記スリーブの前記孔に押圧部材がねじこまれて、前記押圧部材で前記アルミニウム導体が押圧されることを特徴とする電力ケーブルの接続構造である。   In order to achieve the above-described object, a first invention is a power cable connection structure having an aluminum conductor, wherein a substantially cylindrical sleeve having a hole having a female thread portion formed on a side surface is used. The tips of the pair of aluminum conductors are inserted from both sides, a part of the sleeve is compressed, the aluminum conductor and the sleeve are pressure-bonded, and a pressing member is screwed into the hole of the sleeve The power conductor connection structure is characterized in that the aluminum conductor is pressed by the pressing member.

このように、スリーブの一部のみを圧縮するため、スリーブ全体を一度で圧縮する圧縮装置のような大型な装置が不要である。このため、マンホール内などの狭い作業空間でも作業が容易である。   Thus, since only a part of the sleeve is compressed, a large device such as a compression device that compresses the entire sleeve at a time is unnecessary. For this reason, work is easy even in a narrow work space such as in a manhole.

また、全体を圧縮接合したのでは、クリープ変形の影響が大きいが、本発明では、圧縮部以外の部位で、押圧部材によりアルミニウム導体を把持する。このため、クリープ変形の影響を小さくすることができる。また、押圧部材のみで接続した場合のアルミニウム導体の把持力不足を、圧縮部に受け持たせることができる。このため、アルミニウム導体に対して十分な把持力を得ることができる。   Moreover, when the whole is compression-bonded, the influence of creep deformation is large, but in the present invention, the aluminum conductor is held by the pressing member at a portion other than the compression portion. For this reason, the influence of creep deformation can be reduced. In addition, it is possible to cause the compression portion to handle the insufficient gripping force of the aluminum conductor when it is connected only by the pressing member. For this reason, sufficient gripping force can be obtained for the aluminum conductor.

前記スリーブの圧縮部は、前記スリーブのそれぞれの端部近傍であり、前記押圧部材による押圧部は、前記圧縮部に挟まれた部分にあることが望ましい。   It is desirable that the compression portion of the sleeve is in the vicinity of each end portion of the sleeve, and the pressing portion by the pressing member is in a portion sandwiched between the compression portions.

このように、圧縮部をスリーブの端部近傍とし、押圧部を圧縮部の間に設けることで、スリーブの圧縮に伴う押圧部が受ける変形の影響を小さくすることができる。   As described above, by setting the compression portion in the vicinity of the end portion of the sleeve and providing the pressing portion between the compression portions, it is possible to reduce the influence of the deformation that the pressing portion receives due to the compression of the sleeve.

仮に、圧縮部をスリーブの中央部近傍に設けると、スリーブ中央部が圧縮され縮径変形したときスリーブの端部が広がるように変形してしまい、前記押圧部材によるアルミニウム導体の押圧状態が損なわれる恐れがある。これに対し、圧縮部をスリーブの端部近傍に設けと、圧縮部に挟まれたスリーブ中央部近傍の変形を抑制することができる。
なお、スリーブの中央部の内部に、隔壁を設けると、中央部近傍の変形をより抑制する効果を期待できる。
このように押圧部を、変形の影響の小さい部位に配置すると、前記押圧部材によりアルミニウム導体を確りと押圧でき、導体を確実に接続できる。
If the compression portion is provided in the vicinity of the central portion of the sleeve, when the central portion of the sleeve is compressed and contracted in diameter, the end portion of the sleeve is deformed so that the pressing state of the aluminum conductor by the pressing member is impaired. There is a fear. On the other hand, when the compression portion is provided in the vicinity of the end portion of the sleeve, deformation in the vicinity of the central portion of the sleeve sandwiched between the compression portions can be suppressed.
If a partition wall is provided inside the central portion of the sleeve, an effect of further suppressing deformation near the central portion can be expected.
As described above, when the pressing portion is arranged at a portion where the influence of deformation is small, the aluminum conductor can be surely pressed by the pressing member, and the conductor can be reliably connected.

第2の発明は、アルミニウム導体を有する電力ケーブルの接続方法であって、筒状のスリーブを用い、前記スリーブの中央部近傍には、雌ねじ部を有する少なくとも一対の孔が設けられ、前記スリーブの両側から、一対のアルミニウム導体の先端を挿入し、前記スリーブの側面から前記孔に押圧部材をねじこむことで、それぞれの前記アルミニウム導体を前記押圧部材で押圧するとともに、前記スリーブの両端部近傍を縮径するように圧縮することで、前記アルミニウム導体同士を接続することを特徴とする電力ケーブルの接続方法である。   A second invention is a method for connecting a power cable having an aluminum conductor, wherein a cylindrical sleeve is used, and at least a pair of holes having a female screw portion is provided in the vicinity of the center portion of the sleeve. By inserting the tips of a pair of aluminum conductors from both sides and screwing the pressing members into the holes from the side surfaces of the sleeve, the aluminum conductors are pressed by the pressing members, and the vicinity of both ends of the sleeves The power cable connection method is characterized in that the aluminum conductors are connected to each other by being compressed so as to reduce the diameter.

このような構成とすることで、簡易な作業で、アルミニウム導体の把持力を圧縮部で受け持たせ、圧縮部以外の部位を押圧部材による押圧とすることで、アルミニウム導体のクリープ変形による把持力低下を抑制することができる。   With such a configuration, the gripping force of the aluminum conductor can be handled by the compression portion with a simple operation, and the portion other than the compression portion can be pressed by the pressing member, so that the gripping force due to creep deformation of the aluminum conductor can be achieved. The decrease can be suppressed.

本発明によれば、アルミニウム導体を有する高圧用の電力ケーブルに対して、作業性が優れ、確実に導体をスリーブに把持することが可能な電力ケーブルの接続構造等を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the connection structure of the power cable etc. which are excellent in workability | operativity with respect to the high voltage | pressure power cable which has an aluminum conductor, and can hold | grip a conductor to a sleeve reliably can be provided.

スリーブ1を示す外観図であり、(a)は斜視図、(b)は断面図。It is an external view which shows the sleeve 1, (a) is a perspective view, (b) is sectional drawing. (a)はスリーブ1にアルミニウム導体5a、5bを挿入した状態を示す断面図、(b)さらにボルト7で押圧した状態を示す図断面図。(A) is sectional drawing which shows the state which inserted the aluminum conductors 5a and 5b in the sleeve 1, (b) The figure sectional drawing which shows the state pressed with the volt | bolt 7 further. スリーブ1を圧縮した状態を示す断面図。Sectional drawing which shows the state which compressed the sleeve.

以下、本発明の実施の形態にかかる圧縮スリーブについて説明する。図1(a)に示すように、スリーブ1は、略円筒状部材である。スリーブ1は、例えばアルミニウム又はアルミニウム合金製あるいは銅などの金属製の部材である。   The compression sleeve according to the embodiment of the present invention will be described below. As shown in FIG. 1A, the sleeve 1 is a substantially cylindrical member. The sleeve 1 is a member made of metal such as aluminum, an aluminum alloy, or copper.

図1(b)に示すように、スリーブ1の略中央部の内部には、隔壁2が設けられる。また、スリーブ1の側面には、ボルト孔3が設けられる。ボルト孔3は、内面に雌ねじ部を有する。ボルト孔3は、隔壁2で区切られたそれぞれの空間に貫通するように、少なくとも一対形成される。なお、図示した例では、各空間に対してそれぞれ対向する位置にボルト孔3が形成される。   As shown in FIG. 1 (b), a partition wall 2 is provided inside a substantially central portion of the sleeve 1. A bolt hole 3 is provided on the side surface of the sleeve 1. The bolt hole 3 has an internal thread part on the inner surface. The bolt holes 3 are formed in at least a pair so as to penetrate through the spaces separated by the partition walls 2. In the illustrated example, bolt holes 3 are formed at positions facing each space.

図2は、スリーブ1を用いたアルミニウム導体同士の接続工程を示す図である。電力ケーブル10a、10bは、それぞれ、複数の素線が撚り合わされて構成されたアルミニウム導体5a、5bと、アルミニウム導体5a、5bの外周を被覆する絶縁被覆6と備えている。アルミニウム導体5a、5bは、アルミニウム又はアルミニウム合金製である。絶縁被覆6は、アルミニウム導体5a、5bの保護層であり、絶縁性の樹脂製である。   FIG. 2 is a diagram illustrating a connection process between aluminum conductors using the sleeve 1. Each of the power cables 10a and 10b includes an aluminum conductor 5a and 5b formed by twisting a plurality of strands, and an insulating coating 6 that covers the outer periphery of the aluminum conductors 5a and 5b. Aluminum conductors 5a and 5b are made of aluminum or an aluminum alloy. The insulating coating 6 is a protective layer for the aluminum conductors 5a and 5b, and is made of an insulating resin.

まず、電力ケーブル10a、10bの端部の絶縁被覆6を所定長さ剥離して、アルミニウム導体5a、5bを露出させる。次いで、図2(a)に示すように、スリーブ1の両端から接続対象のアルミニウム導体5a、5bの端部を挿入する。   First, the insulation coating 6 at the ends of the power cables 10a and 10b is peeled off by a predetermined length to expose the aluminum conductors 5a and 5b. Next, as shown in FIG. 2 (a), the ends of the aluminum conductors 5 a and 5 b to be connected are inserted from both ends of the sleeve 1.

なお、アルミニウム導体5a、5bの表面には、絶縁性の高い酸化被膜が生じやすい。このため、接続を行う場合には、予め、アルミニウム導体5a、5bのそれぞれの素線の撚りをばらすと共に、個々の素線の表面から酸化被膜の除去することが望ましい。素線の酸化被膜の除去は、研磨、酸化被膜除去剤の使用など、いずれの方法で行ってもよい。また、全ての素線について酸化被膜除去を行うことが望ましいが、外周に近い素線のみについて行ってもよい。酸化被膜除去後は、各素線を撚り戻す。   A highly insulating oxide film tends to be formed on the surfaces of the aluminum conductors 5a and 5b. For this reason, when connecting, it is desirable to previously untwist the strands of the aluminum conductors 5a and 5b and remove the oxide film from the surface of each strand. The removal of the oxide film on the strands may be performed by any method such as polishing or using an oxide film remover. Although it is desirable to remove the oxide film for all the wires, it may be performed only for the wires close to the outer periphery. After the oxide film is removed, each strand is twisted back.

次に、図2(b)に示すように、スリーブ1の両端部にアルミニウム導体5a、5bが挿入された状態で、アルミニウム導体5a、5bとともに、スリーブ1の外周の一部を圧縮する。圧縮部9は、スリーブ1の両端部近傍に形成される。圧縮部9によって、アルミニウム導体5a、5bは、スリーブ1に把持される。   Next, as shown in FIG. 2B, a part of the outer periphery of the sleeve 1 is compressed together with the aluminum conductors 5 a and 5 b in a state where the aluminum conductors 5 a and 5 b are inserted into both ends of the sleeve 1. The compression portion 9 is formed in the vicinity of both end portions of the sleeve 1. The aluminum conductors 5 a and 5 b are gripped by the sleeve 1 by the compression portion 9.

次に、図3に示すように、ボルト孔3に押圧部材であるボルト7をねじ込む。ボルト7は、金属製であり、例えば六角穴付きのボルトである。なお、ボルト7の先端は、アルミニウム導体5a、5に食い込ませやすいように、凸または凹形状などを形成してもよい。   Next, as shown in FIG. 3, a bolt 7 as a pressing member is screwed into the bolt hole 3. The bolt 7 is made of metal, for example, a hexagon socket head bolt. In addition, you may form the convex or concave shape etc. so that the front-end | tip of the volt | bolt 7 may bite into the aluminum conductors 5a and 5 easily.

ボルト7を締め込むことで、ボルト7の先端がアルミニウム導体5a、5bの外周面に食い込み、アルミニウム導体5a、5bを押圧することができる。この結果、アルミニウム導体5a、5bは、スリーブ1に対して密着して把持され、スリーブ1とアルミニウム導体5a、5bとの導通を確保することができる。   By tightening the bolt 7, the tip of the bolt 7 can bite into the outer peripheral surface of the aluminum conductors 5 a and 5 b and press the aluminum conductors 5 a and 5 b. As a result, the aluminum conductors 5a and 5b are held in close contact with the sleeve 1, and electrical connection between the sleeve 1 and the aluminum conductors 5a and 5b can be ensured.

なお、ボルト孔3は、スリーブ1の中央部近傍に形成されている。すなわち、ボルト孔3は、圧縮部9と隔壁2との中間に対して隔壁2側に配置される。このため、ボルト7によるアルミニウム導体5a、5bの押圧部は、アルミニウム導体5a、5bそれぞれの先端部近傍となり、圧縮部9から離れた位置となる。以上により、電力ケーブル10a、10bの接続が終了する。   The bolt hole 3 is formed in the vicinity of the center portion of the sleeve 1. That is, the bolt hole 3 is arranged on the partition 2 side with respect to the middle between the compression portion 9 and the partition 2. For this reason, the pressing portions of the aluminum conductors 5a and 5b by the bolts 7 are in the vicinity of the tip portions of the aluminum conductors 5a and 5b, and are located away from the compression portion 9. Thus, the connection of the power cables 10a and 10b is completed.

なお、スリーブ1の圧縮とボルト7による押圧の順序は逆でも良いが、圧縮による変形の影響を考慮すると、圧縮後に、ボルト7による押圧を行うことが望ましい。このようにすることで、スリーブ1の圧縮時に、ボルト孔3近傍がわずかに変形した場合でも、ボルト7の緩み等の発生を防止することができる。   Although the order of compression of the sleeve 1 and pressing by the bolt 7 may be reversed, it is desirable to press the bolt 7 after compression in consideration of the influence of deformation due to compression. In this way, even when the vicinity of the bolt hole 3 is slightly deformed when the sleeve 1 is compressed, it is possible to prevent the bolt 7 from being loosened.

なお、スリーブ1の内部には、あらかじめ導電性のコンパウンドを設けてもよい。コンパウンドは、アルミニウム導体5a、5bの表面の酸化を防ぐとともに、圧縮作業等において潤滑剤として機能する。また、接続終了後、スリーブ1の外周にはテープを巻き付けることで、コンパウンドの漏れを防止することができる。   Note that a conductive compound may be provided in the sleeve 1 in advance. The compound prevents oxidation of the surfaces of the aluminum conductors 5a and 5b and functions as a lubricant in compression work and the like. Further, after the connection is completed, the leakage of the compound can be prevented by winding a tape around the outer periphery of the sleeve 1.

このように、本実施の形態の電力ケーブル10a、10bの接続構造によれば、アルミニウム導体5a、5bがスリーブ1によって確実に接続される。この際、アルミニウム導体5a、5bは、スリーブ1の一部に形成した圧縮部9によって把持するので、スリーブ1全体を圧縮する場合と比較して、圧縮範囲を小さくすることができる。したがって、作業性に優れる。   Thus, according to the connection structure of power cables 10a and 10b of the present embodiment, aluminum conductors 5a and 5b are reliably connected by sleeve 1. At this time, since the aluminum conductors 5a and 5b are gripped by the compression portion 9 formed in a part of the sleeve 1, the compression range can be reduced as compared with the case where the entire sleeve 1 is compressed. Therefore, it is excellent in workability.

また、スリーブ1の圧縮部9以外の部位に形成されたボルト孔3の部位で、アルミニウム導体5a、5bは、ボルト7による押圧によって把持され、導通が確保される。このように、圧縮とボルト7による押圧を併用することで、スリーブ1の全体を圧縮しなくても、把持力を確保することができる。このため、通電時に圧縮部に生じるアルミニウム導体5a、5bのクリープ変形の影響を小さくすることができる。   In addition, the aluminum conductors 5a and 5b are gripped by the pressure by the bolts 7 at portions of the bolt holes 3 formed in portions other than the compression portion 9 of the sleeve 1, and conduction is ensured. In this way, by using both compression and pressing by the bolt 7, it is possible to ensure a gripping force without compressing the entire sleeve 1. For this reason, it is possible to reduce the influence of creep deformation of the aluminum conductors 5a and 5b generated in the compression portion when energized.

また、圧縮部9はスリーブ1の端部近傍であり、ボルト7による押圧部は、圧縮部9、9の間、すなわちスリーブ1の中央部近傍であるため、圧縮に伴うスリーブ1の変形により、押圧部におけるアルミニウム導体5a、5bの把持力低下を抑制できる。   Further, the compression portion 9 is near the end of the sleeve 1, and the pressing portion by the bolt 7 is between the compression portions 9, 9, that is, near the center portion of the sleeve 1. A decrease in gripping force of the aluminum conductors 5a and 5b in the pressing portion can be suppressed.

仮に、本実施形態とは逆に、圧縮部9をスリーブ1の中央部近傍とし、ボルト孔3をスリーブ1の端部近傍に配置した場合には、スリーブ1の端部近傍が広がるように変形しやすい。このため、ボルト孔3近傍が変形の影響を受けて、アルミニウム導体5a、5bの把持力低下を招きやすい。
しかし、本実施形態のように、圧縮部9をスリーブ1の端部近傍とし、ボルト孔3をスリーブ1の中央部近傍とすることで、圧縮部9をスリーブ1の中央部近傍とした場合と比較して、ボルト孔3近傍の変形を抑制することができる。
また、本実施形態で用いたスリーブ1の中央に両端の空間を分ける隔壁2があるので、この隔壁2の設けられたスリーブ1の中央部は、スリーブ1の両端部が圧縮されたときでも変形しにくい(拡径するようなことがない)。この結果、本実施形態の接続構造では、隔壁2で変形が抑制された中央と圧縮されて縮径する端部との間にある、ボルト孔3を設けた押圧部がスリーブ1の圧縮により縮径してアルミニウム導体5a、5bをより確りと把持する。
Contrary to the present embodiment, when the compression portion 9 is located in the vicinity of the center portion of the sleeve 1 and the bolt hole 3 is disposed in the vicinity of the end portion of the sleeve 1, the deformation is performed so that the vicinity of the end portion of the sleeve 1 is expanded. It's easy to do. For this reason, the vicinity of the bolt hole 3 is affected by the deformation, and the gripping force of the aluminum conductors 5a and 5b is likely to be reduced.
However, as in the present embodiment, the compression portion 9 is in the vicinity of the end portion of the sleeve 1 and the bolt hole 3 is in the vicinity of the central portion of the sleeve 1, so that the compression portion 9 is in the vicinity of the central portion of the sleeve 1. In comparison, deformation near the bolt hole 3 can be suppressed.
Further, since there is a partition wall 2 that divides the space at both ends in the center of the sleeve 1 used in this embodiment, the center portion of the sleeve 1 provided with the partition wall 2 is deformed even when both ends of the sleeve 1 are compressed. Difficult to do (no increase in diameter). As a result, in the connection structure of the present embodiment, the pressing portion provided with the bolt hole 3 between the center where the deformation is suppressed by the partition wall 2 and the end portion that is compressed to reduce the diameter is compressed by the compression of the sleeve 1. Diameter to grip the aluminum conductors 5a and 5b more securely.

このように、実施形態の接続構造によれば、アルミニウム導体5a、5bを有する高圧用の電力ケーブル10a、10bを接続する際の作業性に優れ、十分な把持力と耐クリープ変形特性に優れた電力ケーブルの接続構造を得ることができる。   Thus, according to the connection structure of the embodiment, the workability when connecting the high-voltage power cables 10a, 10b having the aluminum conductors 5a, 5b is excellent, and the gripping force and the creep deformation resistance are excellent. A power cable connection structure can be obtained.

以上、添付図を参照しながら、本発明の実施の形態を説明したが、本発明の技術的範囲は、前述した実施の形態に左右されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.

1………スリーブ
2………隔壁
3………ボルト孔
5a、5b………アルミニウム導体
6………絶縁被覆
7………ボルト
9………圧縮部
10a、10b………電力ケーブル
DESCRIPTION OF SYMBOLS 1 ......... Sleeve 2 ......... Partition wall 3 ......... Bolt hole 5a, 5b ......... Aluminum conductor 6 ......... Insulation coating 7 ......... Bolt 9 ......... Compression part 10a, 10b ......... Power cable

Claims (3)

アルミニウム導体を有する電力ケーブルの接続構造であって、
側面に雌ねじ部を有する孔が形成される略筒状のスリーブが用いられ、
前記スリーブの両側から一対の前記アルミニウム導体の先端が挿入され、
前記スリーブの一部が圧縮されてそれぞれの前記アルミニウム導体と前記スリーブとが圧着されるとともに、前記スリーブの前記孔に押圧部材がねじこまれて、前記押圧部材で前記アルミニウム導体が押圧されることを特徴とする電力ケーブルの接続構造。
A power cable connection structure having an aluminum conductor,
A substantially cylindrical sleeve in which a hole having an internal thread portion is formed on the side surface is used,
The tips of the pair of aluminum conductors are inserted from both sides of the sleeve,
A part of the sleeve is compressed, the aluminum conductor and the sleeve are pressure-bonded, a pressing member is screwed into the hole of the sleeve, and the aluminum conductor is pressed by the pressing member. Power cable connection structure characterized by
前記スリーブの圧縮部は、前記スリーブのそれぞれの端部近傍であり、
前記押圧部材による押圧部は、前記圧縮部に挟まれた部分にあることを特徴とする請求項1記載の電力ケーブルの接続構造。
The compression part of the sleeve is near the respective end of the sleeve;
The power cable connection structure according to claim 1, wherein the pressing portion by the pressing member is in a portion sandwiched between the compression portions.
アルミニウム導体を有する電力ケーブルの接続方法であって、
筒状のスリーブを用い、
前記スリーブの中央部近傍には、雌ねじ部を有する少なくとも一対の孔が設けられ、
前記スリーブの両側から、一対のアルミニウム導体の先端を挿入し、
前記スリーブの側面から前記孔に押圧部材をねじこむことで、それぞれの前記アルミニウム導体を前記押圧部材で押圧するとともに、前記スリーブの両端部近傍を縮径するように圧縮することで、前記アルミニウム導体同士を接続することを特徴とする電力ケーブルの接続方法。
A method for connecting a power cable having an aluminum conductor, comprising:
Using a cylindrical sleeve,
Near the central portion of the sleeve is provided with at least a pair of holes having a female screw portion,
From both sides of the sleeve, insert the tip of a pair of aluminum conductors,
By screwing the pressing member into the hole from the side surface of the sleeve, the aluminum conductor is pressed by the pressing member and compressed so that the diameters of both ends of the sleeve are reduced. A method for connecting power cables, characterized by connecting each other.
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JP2017169262A (en) * 2016-03-14 2017-09-21 昭和電線ケーブルシステム株式会社 Terminal connector of aluminum conductor cable
JP2018069303A (en) * 2016-11-01 2018-05-10 古河電気工業株式会社 Cable joint for welding
JP2018073688A (en) * 2016-11-01 2018-05-10 古河電気工業株式会社 Pipe sleeve

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KR101883872B1 (en) * 2017-11-17 2018-07-31 주식회사 이피이 Conductor and sleeve connection structure of power cable
CN110364907B (en) * 2019-08-08 2021-01-26 贵州电网有限责任公司 Compression joint method for 7-strand steel-cored aluminum strands of round-wire concentric stranded overhead conductor

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JP2007250483A (en) * 2006-03-20 2007-09-27 Viscas Corp Cable conductor connecting method, connection part and conductor connecting sleeve

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CN105216654A (en) * 2015-10-20 2016-01-06 江西稀有金属钨业控股集团有限公司 A kind of connection fixing means of mine electric locomotive overhead transmission line
JP2017169262A (en) * 2016-03-14 2017-09-21 昭和電線ケーブルシステム株式会社 Terminal connector of aluminum conductor cable
JP2018069303A (en) * 2016-11-01 2018-05-10 古河電気工業株式会社 Cable joint for welding
JP2018073688A (en) * 2016-11-01 2018-05-10 古河電気工業株式会社 Pipe sleeve

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