JPH0539133U - Power cable connection - Google Patents
Power cable connectionInfo
- Publication number
- JPH0539133U JPH0539133U JP9183691U JP9183691U JPH0539133U JP H0539133 U JPH0539133 U JP H0539133U JP 9183691 U JP9183691 U JP 9183691U JP 9183691 U JP9183691 U JP 9183691U JP H0539133 U JPH0539133 U JP H0539133U
- Authority
- JP
- Japan
- Prior art keywords
- electric field
- power cable
- field relaxation
- stress cone
- relaxation body
- 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.)
- Pending
Links
Landscapes
- Cable Accessories (AREA)
Abstract
(57)【要約】
【目的】 電気絶縁性能が向上し、且つ、構造が簡単化
した電力ケーブル接続部を提供する。
【構成】 円筒状の導通部１３ａと略中空円錐状の電界
抑圧部１３ｂが一体に形成された導電性ゴムからなるラ
ッパ状の電界緩和体１３に、電力ケーブルを挿通し、前
記電界緩和体１３の導通部１３ａを電力ケーブルの外部
半導電体６に密着するように固定する。
(57) [Abstract] [Purpose] To provide a power cable connecting portion having improved electrical insulation performance and a simplified structure. A power cable is inserted into a trumpet-shaped electric field relaxation body 13 made of conductive rubber in which a cylindrical conduction section 13a and a substantially hollow conical electric field suppression section 13b are integrally formed, and the electric field relaxation body 13 is formed. The conducting portion 13a of is fixed so as to be in close contact with the outer semi-conductor 6 of the power cable.
Description
【０００１】[0001]
本考案は、電界緩和体を用いた電力ケーブルの接続部に関する。 The present invention relates to a connection portion of a power cable using an electric field relaxation body.
【０００２】[0002]
ゴム・プラスチック絶縁電力ケーブルのプレハブ接続部では、絶縁の主体は図 ３に示すように、ケーブルの外部半導体電体６の外周に装着されている絶縁ブロ ック３とストレスコーン２である。ストレスコーン２は縦断面が山形をしており 、回転対称形をなしている。この接続部の絶縁特性は、絶縁ブロック３およびケ ーブルの外部半導体電体６にストレスコーン２が適切な圧力を保って空隙がない ように密着して始めて発揮される。この接続部の絶縁特性を維持するため、スプ リング１ａと押し金具１ｂからなるストレスコーン圧縮装置１によりストレスコ ーン２を押して、ストレスコーン２とケーブルの外部半導電体６およ絶縁ブロッ ク３との接触界面に一定の圧力を加えている。 ストレスコーン２は、導電性ゴムからなる略円筒状の電極部２ａと、前記電極 部２ａを覆う絶縁性の弾性ゴムからなる絶縁部２ｂからなり、両者はその界面に 空隙が生じないように一体に接合されている。電極部２ａは、円管状の導通部２ ｃと該導通部２ｃに一体に連設された略中空円錐台状の電界抑圧部２ｄとから構 成されている。導通部２ｃは電力ケーブルの外部半導電体６の表面に密着して、 電界抑圧部２ｄにより電力ケーブルの外部半導電体６の端末部の電界を図示右方 向に導くと共に、電界強度を適度に緩和しつつ碍管４のほぼ全長に渡って分散さ せる。 絶縁ブロック３は金属部３ａとエポキシ樹脂部３ｂからなり、金属部３ａに接 続した補助電極３ｃがエポキシ樹脂部３ｂ内に埋め込まれている。 碍管４と絶縁ブロック３およびストレスコーン２とにより形成された空間部１ ２には、絶縁油が満たされている。この絶縁油は、シールパッキング１１とスト レスコーン２により、ストレスコーン圧縮装置１が設置された側に漏れないよう に空間部１２に封じ込まれている。 In the prefabricated connection portion of the rubber / plastic insulated power cable, the main body of insulation is the insulation block 3 and the stress cone 2 mounted on the outer periphery of the external semiconductor electric body 6 of the cable, as shown in FIG. The stress cone 2 has a mountain-shaped vertical cross section, and has a rotationally symmetrical shape. The insulating property of this connection portion is exhibited only when the stress cone 2 is brought into close contact with the insulating block 3 and the external semiconductor electric body 6 of the cable so as to maintain an appropriate pressure and have no void. In order to maintain the insulation characteristics of this connection, the stress cone 2 is pushed by the stress cone compression device 1 consisting of the spring 1a and the pressing metal fitting 1b, and the stress cone 2 and the outer semi-conductor 6 of the cable and the insulation block are pressed. A constant pressure is applied to the contact interface with 3. The stress cone 2 is composed of a substantially cylindrical electrode portion 2a made of conductive rubber and an insulating portion 2b made of insulating elastic rubber covering the electrode portion 2a, and both are integrated so that no void is formed at the interface. Is joined to. The electrode portion 2a is composed of a circular tube-shaped conducting portion 2c and a substantially hollow truncated cone-shaped electric field suppressing portion 2d which is integrally connected to the conducting portion 2c. The conducting portion 2c is in close contact with the surface of the outer semi-conductor 6 of the power cable, and the electric field suppressing portion 2d guides the electric field of the terminal portion of the outer semi-conductor 6 of the power cable to the right in the figure, and also has a proper electric field strength. It is dispersed over almost the entire length of the porcelain insulator 4 while relaxing. The insulating block 3 includes a metal portion 3a and an epoxy resin portion 3b, and an auxiliary electrode 3c connected to the metal portion 3a is embedded in the epoxy resin portion 3b. The space 12 formed by the porcelain insulator 4, the insulating block 3 and the stress cone 2 is filled with insulating oil. The insulating oil is sealed in the space 12 by the seal packing 11 and the stress cone 2 so as not to leak to the side where the stress cone compressor 1 is installed.
【０００３】[0003]
従来の電力ケーブル電気接続部には、次のような問題があった。即ち、 １）絶縁ブロック３の内周面とストレスコーン２との界面、およびストレスコー ン２の絶縁部２ｂの内周面とケーブル絶縁体との界面が存在するため、接続部の 電気絶縁性能はこれらの界面の接触状態で制約される。 ２）ストレスコーン圧縮装置１を必要とするため、接続部全体の構造は複雑にな り、大きな空間を要する。 The conventional power cable electrical connection has the following problems. That is, 1) Since there is an interface between the inner peripheral surface of the insulating block 3 and the stress cone 2 and an interface between the inner peripheral surface of the insulating portion 2b of the stress cone 2 and the cable insulator, the electrical insulation performance of the connection portion is improved. Is constrained by the contact state of these interfaces. 2) Since the stress cone compression device 1 is required, the structure of the entire connecting portion is complicated and requires a large space.
【０００４】[0004]
本考案は上記問題点を解決した電力ケーブル電気接続部を提供するもので、円 筒状の導通部と略中空円錐状の電界抑圧部が一体に形成された導電性ゴムからな るラッパ状の電界緩和体に、電力ケーブルを挿通し、前記電界緩和体の導通部を 電力ケーブルの外部半導電体に密着して固定したことを特徴とするものである。 上述のような接続部では、従来の接続部に存在した、電気絶縁性能を制約する 絶縁ブロックとストレスコーンとの界面、およびストレスコーンの絶縁部内周面 とケーブル絶縁体６との界面が存在しないため、電気絶縁性能が向上する。また 、上記界面を圧接状態にするストレスコーン圧縮装置を必要としないため、接続 部全体の構造は簡単になり、大きな空間も必要としない。 The present invention provides an electric connection part for a power cable which solves the above-mentioned problems, and has a trumpet shape made of conductive rubber in which a cylindrical conducting part and a substantially hollow conical electric field suppressing part are integrally formed. The power cable is inserted through the electric field relaxation body, and the conducting portion of the electric field relaxation body is fixed in close contact with the outer semiconductive body of the power cable. In the above-mentioned connecting portion, the interface between the insulating block and the stress cone, which restricts the electrical insulation performance, and the interface between the inner peripheral surface of the insulating portion of the stress cone and the cable insulator 6, which are present in the conventional connecting portion, do not exist. Therefore, the electrical insulation performance is improved. Further, since the stress cone compression device for bringing the above interface into a pressure contact state is not required, the structure of the entire connecting portion is simplified and a large space is not required.
【０００５】[0005]
以下、図面に示した実施例に基づいて本考案を詳細に説明する。 図１は本考案にかかる電力ケーブル接続部の一実施例の断面図である。図中、 １３は導電性ゴムからなる電界緩和体であり、１４は保持具である。この電界緩 和体１３は、円筒状の導通部１３ａと円錐状の電界抑圧部１３ｂが一体に形成さ れたもので、ラッパ状をなしている。保持具１４は、金属部１４ａとエポキシ樹 脂部１４ｂからなり、電界緩和体１３の機能を補助するために金属部１４ａを伸 長させて補助電極１４ｃを設ける。保持具１４はシールパッキング１１を介して 碍管４に水密の固定される。電界緩和体１３の電界抑圧部１３ｂの先端部は、保 持具１４のエポキシ樹脂部１４ｂの内周面に予め空隙のないように接合されてい る。電界緩和体１３の導通部１３ａの外周には、弾性ゴムからなる略円環状のダ ンパ１５が接合されており、さらにダンパ１５の外側にはホースバンドのような 締結バンド１６がかけられている。この締結バンド１６によりダンパ１５を締め つけて、導通部１３ａを空隙のないようにケーブルの外部半導電体６に圧着する 。碍管４、保持具１４、電界緩和体１３、電力ケーブル絶縁体６により形成され る空間１７内に絶縁性の油あるいはガスを封入することは従来と同様である。 図２は本考案にかかる他の実施例の断面図である。本実施例は、前記実施例を 簡略化したもので、前記実施例における補助電極を除いた場合である。保持具２ ４はシールパッキング１１を介して碍管４に水密に固定される。電界緩和体１３ の導通部１３ａと保持具２４の間には、弾性ゴムからなる略円環状のパッキング ２５が装着されている。略円環状の押し圧縮金具２６をボルト２７でパッキング ２５に押しつけて、電界緩和体１３の導通部１３ａをケーブルの外部半導電体６ 上に空隙のないように圧着する。碍管４、保持具２４、電界緩和体１３、電力ケ ーブルの外部半導電体６により空間２８内に絶縁性の油あるいはガスを封入する ことは従来と同様である。 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view of an embodiment of a power cable connecting portion according to the present invention. In the figure, 13 is an electric field relaxation body made of conductive rubber, and 14 is a holder. The electric field relaxation body 13 is formed by integrally forming a cylindrical conducting portion 13a and a conical electric field suppressing portion 13b, and has a trumpet shape. The holder 14 is composed of a metal portion 14a and an epoxy resin portion 14b, and in order to assist the function of the electric field relaxation body 13, the metal portion 14a is extended to provide an auxiliary electrode 14c. The holder 14 is watertightly fixed to the porcelain tube 4 via the seal packing 11. The tip of the electric field suppressing portion 13b of the electric field alleviating body 13 is previously joined to the inner peripheral surface of the epoxy resin portion 14b of the holder 14 so that there is no space. A substantially annular damper 15 made of elastic rubber is joined to the outer periphery of the conducting portion 13a of the electric field relaxation body 13, and a fastening band 16 such as a hose band is attached to the outside of the damper 15. .. The damper 15 is tightened by the fastening band 16, and the conducting portion 13a is pressure-bonded to the outer semi-conductor 6 of the cable without any void. It is the same as the conventional case that the insulating oil or gas is sealed in the space 17 formed by the insulator 4, the holder 14, the electric field relaxation body 13, and the power cable insulator 6. FIG. 2 is a sectional view of another embodiment according to the present invention. The present embodiment is a simplification of the above embodiment, and is the case where the auxiliary electrode in the above embodiment is omitted. The holder 24 is watertightly fixed to the porcelain bushing 4 via a seal packing 11. A substantially annular packing 25 made of elastic rubber is mounted between the conducting portion 13 a of the electric field relaxation body 13 and the holder 24. The substantially annular pressing and compressing metal fitting 26 is pressed against the packing 25 with the bolt 27, and the conducting portion 13a of the electric field relaxation body 13 is crimped onto the outer semi-conductor 6 of the cable without any void. The insulating oil or gas is sealed in the space 28 by the insulator 4, the holder 24, the electric field relaxation body 13, and the outer semiconductive body 6 of the power cable in the same manner as in the conventional case.
【０００６】[0006]
以上説明したように本考案によれば、円筒状の導通部と略中空円錐状の電界抑 圧部が一体に形成された導電性ゴムからなるラッパ状の電界緩和体に、電力ケー ブルを挿通し、前記電界緩和体の導通部を電力ケーブルの外部半導電体に密着し て固定してあるため、電気絶縁性能は向上し、且つ、構造が簡単化して安価にな るという優れた効果がある。 As described above, according to the present invention, the electric power cable is inserted into the trumpet-shaped electric field relaxation body made of conductive rubber in which the cylindrical conducting portion and the substantially hollow conical electric field suppressing portion are integrally formed. However, since the conducting portion of the electric field relaxation body is fixed in close contact with the outer semiconductive body of the power cable, the electrical insulating performance is improved, and the structure is simplified and the cost is reduced. is there.
【図１】本考案に係る電力ケーブル接続部の一実施例の
断面である。FIG. 1 is a cross-sectional view of an embodiment of a power cable connecting part according to the present invention.
【図２】本考案に係る電力ケーブル接続部の他の実施例
の断面である。FIG. 2 is a cross-sectional view of another embodiment of the power cable connecting part according to the present invention.
【図３】従来の電力ケーブル接続部の断面図である。FIG. 3 is a cross-sectional view of a conventional power cable connecting portion.
１ ストレスコーン圧縮装置 １ａ スプリング １ｂ 押し金具 ２ ストレスコーン ２ａ 電極部 ２ｂ 絶縁部 ２ｃ、１３ａ 導通部 ２ｄ、１３ｂ 電界抑圧部 ３ 絶縁ブロック ３ａ、１４ａ 金属部 ３ｂ、１４ｂ エポキシ樹脂部 ３ｃ、１４ｃ 補助電極 ４ 碍管 ６ ケーブルの外部半導電体 １１ シールパッキング １２、１７、２８空間部 １３ 電界緩和体 １４、２４ 保持具 １５ ダンパ １６ 締結バンド ２５ パッキング ２６ 押し圧縮金具 ２７ ボルト 1 Stress Cone Compressor 1a Spring 1b Push Metal Fitting 2 Stress Cone 2a Electrode Part 2b Insulating Part 2c, 13a Conducting Part 2d, 13b Electric Field Suppressing Part 3 Insulating Block 3a, 14a Metal Part 3b, 14b Epoxy Resin Part 3c, 14c Auxiliary Electrode 4 Insulator 6 Cable outer semi-conductor 11 Seal packing 12, 17, 28 Space 13 Electric field relaxation body 14, 24 Holding device 15 Damper 16 Fastening band 25 Packing 26 Push compression metal fitting 27 Bolt
Claims (1)
圧部が一体に形成された導電性ゴムからなるラッパ状の
電界緩和体に、電力ケーブルを挿通し、前記電界緩和体
の導通部を電力ケーブルの外部半導電体に密着して固定
したことを特徴とする電力ケーブル接続部。1. A power cable is inserted into a trumpet-shaped electric field relaxation body made of conductive rubber in which a cylindrical conduction section and a substantially hollow-cone electric field suppression section are integrally formed, and the electric field relaxation section conducts. An electric power cable connecting portion characterized in that the portion is adhered and fixed to an outer semi-conductor of the electric power cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9183691U JPH0539133U (en) | 1991-10-14 | 1991-10-14 | Power cable connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9183691U JPH0539133U (en) | 1991-10-14 | 1991-10-14 | Power cable connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0539133U true JPH0539133U (en) | 1993-05-25 |
Family
ID=14037681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9183691U Pending JPH0539133U (en) | 1991-10-14 | 1991-10-14 | Power cable connection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0539133U (en) |
-
1991
- 1991-10-14 JP JP9183691U patent/JPH0539133U/en active Pending
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