JPH0142586B2 - - Google Patents
Info
- Publication number
- JPH0142586B2 JPH0142586B2 JP60084720A JP8472085A JPH0142586B2 JP H0142586 B2 JPH0142586 B2 JP H0142586B2 JP 60084720 A JP60084720 A JP 60084720A JP 8472085 A JP8472085 A JP 8472085A JP H0142586 B2 JPH0142586 B2 JP H0142586B2
- Authority
- JP
- Japan
- Prior art keywords
- extrusion
- mold
- cable
- predetermined temperature
- frequency induction
- 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.)
- Expired
Links
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
- Processing Of Terminals (AREA)
Description
【発明の詳細な説明】
〔発明の背景と目的〕
本発明は架橋ポリエチレン絶縁ケーブル（以下
CVケーブルと呼ぶ）の押出し成型モールド接続
部に関する。[Detailed Description of the Invention] [Background and Objectives of the Invention] The present invention relates to a cross-linked polyethylene insulated cable (hereinafter referred to as
Concerning extrusion molded connections for CV cables (referred to as CV cables).
CVケーブルはすでに154KV長距離線路に導入
されており、その接続部の形成には架橋剤入りポ
リエチレンテープ巻きによるモールド式が実用化
されている。モールド式接続部はケーブルの絶縁
体と同材料のポリエチレンを用いてモールドする
ため、電気性能の面で信頼性が著しく高く、
154KV以上のケーブルの接続部として実用化の
傾向にある。 CV cables have already been introduced in 154KV long-distance lines, and a molding method using polyethylene tape containing a cross-linking agent has been put into practical use to form connections. Molded connections are molded using polyethylene, the same material as the cable insulation, so they are extremely reliable in terms of electrical performance.
There is a trend towards practical use as a connection part for cables of 154KV or higher.
一方275KV線路に対しては長距離ルートへの
CVケーブルの採用は時間の問題となつており、
特にこれを実現するにはより一層の信頼性の向上
がはかれる押出成型モールド式接続部が必要とな
る。押出成型モールド式接続部は押出し成型用金
型と押出装置を用いて形成されるものであつて、
ケーブル製造技術の現場適用の面から実用化が望
まれている。そしてその接続部の形成においては
押出成型用金型をとりつけてケーブルを予熱し押
出し成形する工程が必要であり、この予熱を効率
よく行う方法が必要である。 On the other hand, for 275KV line,
It is only a matter of time before CV cables are adopted.
In particular, in order to achieve this, an extrusion mold type connection part is required, which is intended to further improve reliability. The extrusion mold type connection part is formed using an extrusion mold and an extrusion device, and
It is hoped that this technology will be put to practical use in terms of on-site application of cable manufacturing technology. In order to form the connection part, it is necessary to install an extrusion mold, preheat the cable, and extrude it, and a method for efficiently performing this preheating is required.
本発明の目的はCVケーブル接続部を押出成型
モールド方式で形成する際の押出し成型する前の
ケーブル予加熱を効率よく行う方法を提供するこ
とである。 An object of the present invention is to provide a method for efficiently preheating a cable before extrusion molding when forming a CV cable connection part using an extrusion molding method.
本発明によれば押出成型用金型の両端のケーブ
ル部分に高周波誘導加熱コイルを配置し、金型の
加熱と並行して高周波誘導加熱コイルによりケー
ブル導体を加熱することにより上記目的を達成す
る。
According to the present invention, high-frequency induction heating coils are arranged in the cable portions at both ends of an extrusion mold, and the cable conductor is heated by the high-frequency induction heating coils in parallel with heating the mold, thereby achieving the above object.
第１図は本発明の方法を実施するための諸装置
の配置を示す部分断面図である。
FIG. 1 is a partial cross-sectional view showing the arrangement of devices for carrying out the method of the invention.
第１図において、CVケーブル７を所定の形状
に加工後、導体接続管１で導体を接続し、内部半
導電層２をその上に設ける。導体接続管１は圧縮
スリーブ方式あるいは溶接方式等任意であり、内
部半導電層２は半導電性ポリオレフイン収縮チユ
ーブ、あるいはプレモールド半導電性ユニツト等
を用いて形成することが出来る。CVケーブル７
の接続すべき個所に押出し成型用金型４を配置す
る。金型４にはオーバフロー孔５、加熱用ヒータ
６が設けられている。また加熱用ヒータ６には加
熱制御装置９が接続されて金型を所定温度とする
ようにヒータ６を制御する。 In FIG. 1, after a CV cable 7 is processed into a predetermined shape, the conductors are connected with a conductor connecting tube 1, and an internal semiconducting layer 2 is provided thereon. The conductor connecting tube 1 can be formed by any method such as a compression sleeve method or a welding method, and the internal semiconductive layer 2 can be formed using a semiconductive polyolefin shrink tube, a pre-molded semiconductive unit, or the like. CV cable 7
An extrusion mold 4 is placed at the location where the connection is to be made. The mold 4 is provided with an overflow hole 5 and a heating heater 6. Further, a heating control device 9 is connected to the heating heater 6 and controls the heater 6 so as to bring the mold to a predetermined temperature.
金型４の両端部には所定の長さに高周波誘導加
熱コイル８が配置され、この高周波誘導加熱コイ
ル８には発振装置１１が接続されてCVケーブル
７の導体温度が所定の温度となるように電力供給
制御が行われる。 A high-frequency induction heating coil 8 is arranged at a predetermined length at both ends of the mold 4, and an oscillation device 11 is connected to the high-frequency induction heating coil 8 so that the conductor temperature of the CV cable 7 reaches a predetermined temperature. Power supply control is performed.
金型４を例えば100℃〜160℃の所定温度に設定
し、それと同時に高周波誘導加熱コイル８により
CVケーブル７の導体を加熱し、導体接続管１の
温度が所定温度（例えば90℃〜150℃）に達し安
定した後に金型４に直結した押出装置１０からポ
リオレフイン樹脂を押出し絶縁体３を成型する。
またこの際、金型４内の空間を予め不活性ガス
（N2、SF6、フレオン等）に置換しておくことも
出来る。 The mold 4 is set to a predetermined temperature of, for example, 100°C to 160°C, and at the same time the high-frequency induction heating coil 8 is heated.
After the conductor of the CV cable 7 is heated and the temperature of the conductor connecting tube 1 reaches a predetermined temperature (for example, 90°C to 150°C) and becomes stable, polyolefin resin is extruded from an extrusion device 10 directly connected to the mold 4 to form the insulator 3. do.
Further, at this time, the space inside the mold 4 can be replaced with an inert gas (N 2 , SF 6 , Freon, etc.) in advance.
本発明の方法によれば押出し成型時に行うケー
ブルの予熱が効率よく行え、また予熱時間の短縮
が可能となる。更に結果としての接続部は押出成
型モールドによるものであり信頼性の高いもので
ある。また本方法は特殊な熟練を必要とせずに実
施可能である。
According to the method of the present invention, preheating of the cable during extrusion molding can be performed efficiently, and the preheating time can be shortened. Additionally, the resulting connection is extrusion molded and highly reliable. Moreover, this method can be carried out without requiring special skill.
第１図は本発明の方法を実施するための諸装置
の配置を示す部分断面図である。
１……導体接続管、２……内部半導電層、３…
…絶縁層、４……金型、５……オーバフロー孔、
６……加熱用ヒータ、７……CVケーブル、８…
…高周波誘導加熱コイル、９……ヒータ制御装
置、１０……押出装置、１１……発振制御装置。
FIG. 1 is a partial cross-sectional view showing the arrangement of devices for carrying out the method of the invention. 1... Conductor connection tube, 2... Internal semiconducting layer, 3...
...Insulating layer, 4...Mold, 5...Overflow hole,
6... Heating heater, 7... CV cable, 8...
...High frequency induction heating coil, 9... Heater control device, 10... Extrusion device, 11... Oscillation control device.
Claims (1)
を用いての接続部の押出し成型において、接続す
べき部分に加熱用ヒータを有する押出し成型用金
型を所定温度に加熱すると共に押出し成型用金型
の両端のケーブルの所定長さ部分に高周波誘導加
熱用コイルを設置し予め高周波誘導加熱用コイル
による付加加熱を行つて所定温度に保持された状
態となつた後に、押出し成型用金型に直結した押
出し装置によりポリオレフイン樹脂を押出し成型
することを特徴とする押出用金型内ケーブルの予
熱押出し方法。1. In extrusion molding of a connection part using a mold for forming a cross-linked polyethylene insulated cable, the extrusion mold having a heating heater in the part to be connected is heated to a predetermined temperature, and both ends of the extrusion mold are heated to a predetermined temperature. A high-frequency induction heating coil is installed on a predetermined length of the cable, and after the high-frequency induction heating coil performs additional heating to maintain a predetermined temperature, an extrusion device that is directly connected to an extrusion mold is used. A method for preheating and extruding a cable in an extrusion mold, characterized by extrusion molding a polyolefin resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60084720A JPS61243681A (en) | 1985-04-19 | 1985-04-19 | Preheat extrusion of die-in cable for extrusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60084720A JPS61243681A (en) | 1985-04-19 | 1985-04-19 | Preheat extrusion of die-in cable for extrusion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61243681A JPS61243681A (en) | 1986-10-29 |
| JPH0142586B2 true JPH0142586B2 (en) | 1989-09-13 |
Family
ID=13838514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60084720A Granted JPS61243681A (en) | 1985-04-19 | 1985-04-19 | Preheat extrusion of die-in cable for extrusion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61243681A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH071969B2 (en) * | 1985-07-03 | 1995-01-11 | 住友電気工業株式会社 | Method for forming connection part of cross-linked polyethylene insulated power cable |
| JP2627979B2 (en) * | 1991-02-27 | 1997-07-09 | 三菱電線工業株式会社 | Prefabricated connection heating method |
-
1985
- 1985-04-19 JP JP60084720A patent/JPS61243681A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61243681A (en) | 1986-10-29 |
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