JPH07118355B2 - Molding method for intermediate connection of rubber and plastic insulation cable - Google Patents

Molding method for intermediate connection of rubber and plastic insulation cable

Info

Publication number
JPH07118355B2
JPH07118355B2 JP57138260A JP13826082A JPH07118355B2 JP H07118355 B2 JPH07118355 B2 JP H07118355B2 JP 57138260 A JP57138260 A JP 57138260A JP 13826082 A JP13826082 A JP 13826082A JP H07118355 B2 JPH07118355 B2 JP H07118355B2
Authority
JP
Japan
Prior art keywords
cable
rubber
container
pressurizing
heating
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 - Lifetime
Application number
JP57138260A
Other languages
Japanese (ja)
Other versions
JPS5927486A (en
Inventor
伸一 入江
輝義 田辺
孝男 中野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
THE FURUKAW ELECTRIC CO., LTD.
Original Assignee
THE FURUKAW ELECTRIC CO., LTD.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by THE FURUKAW ELECTRIC CO., LTD. filed Critical THE FURUKAW ELECTRIC CO., LTD.
Priority to JP57138260A priority Critical patent/JPH07118355B2/en
Publication of JPS5927486A publication Critical patent/JPS5927486A/en
Publication of JPH07118355B2 publication Critical patent/JPH07118355B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Manufacturing Of Electrical Connectors (AREA)
  • Processing Of Terminals (AREA)

Description

【発明の詳細な説明】 本発明は、ゴム、プラスチック絶縁ケーブルの中間接続
部の成形時における電気特性の低下の問題を改良したも
のである。
DETAILED DESCRIPTION OF THE INVENTION The present invention has improved the problem of deterioration of electrical characteristics during molding of an intermediate connecting portion of a rubber or plastic insulated cable.

一般に、ゴム、プラスチック絶縁ケーブルの中間接続部
の成形方法としては、次のような方法が採用されてい
る。これを第1図を参照して説明する。まず、接続すべ
き2本のケーブルA、B端末を鉛筆状に削り、導体を露
出せしめた後、この導体同志を圧縮スリーブ等で電気的
に接続する。つづいて、その外側に半導電性収縮スリー
ブ等で内部半導電層を、更に外側にポリエチレンテープ
等によるテープ絶縁層を順次形成し、場合によってはそ
の上に外部半導電層を形成する。この後、形成された積
層接続部部分1を加熱融着して全体を一体化せしめるた
めに、前記接続部の外側に金属製の加圧容器2を包被装
着し、該容器内にヒーターを埋め込んだり、或いは該接
続部に直接ヒーターをおいて加熱するとか、又は該容器
中にガスを圧入して加圧する方法により加熱加圧して成
形加工を行っている。
Generally, the following method is adopted as a method for molding the intermediate connecting portion of the rubber or plastic insulated cable. This will be described with reference to FIG. First, the two cables A and B to be connected are ground in a pencil shape to expose the conductor, and then the conductors are electrically connected by a compression sleeve or the like. Subsequently, an inner semiconductive layer is sequentially formed on the outer side with a semiconductive shrinkable sleeve or the like, a tape insulating layer with a polyethylene tape or the like is sequentially formed on the outer side, and an outer semiconductive layer is formed thereon in some cases. After that, in order to heat-bond the formed laminated connection portion 1 to integrate the whole, the metal pressure vessel 2 is covered and attached to the outside of the connection portion, and a heater is installed in the vessel. Molding is performed by embedding or heating by directly placing a heater on the connection portion, or by heating and pressurizing by a method of pressurizing and pressurizing gas into the container.

しかしながら、上記各方法による場合、上記金属製加圧
容器2もヒーターにて同時に加熱されるため、加熱され
た金属製加圧容器2は接続部近傍のケーブル表面3、
3′に接していることから当該部分のケーブル絶縁層は
異常高温にて長時間加熱されることになる。従って、こ
の部分の絶縁層は長時間に亘り異常な熱履歴を受けるた
め、当該ケーブルについて電気破壊試験を行うと、前記
部分で低い値にて破壊することがしばしばあった。
However, in the case of each of the above methods, since the metal pressure vessel 2 is also heated by the heater at the same time, the heated metal pressure vessel 2 is connected to the cable surface 3 near the connection portion.
Since the cable insulating layer is in contact with 3 ', the cable insulating layer in that portion is heated at an abnormally high temperature for a long time. Therefore, since the insulating layer in this portion is subjected to an abnormal heat history for a long time, when the cable was subjected to an electric breakdown test, the cable was often broken at a low value.

本発明は、かかる現状に鑑み、加圧容器を使用して接続
部を加熱加圧して成形するに際し、被接続ケーブルの絶
縁体の電気特性を低下せしめることなく中間接続部を形
成する方法を確立したものである。
In view of the current situation, the present invention establishes a method of forming an intermediate connection portion without deteriorating the electrical characteristics of the insulator of the cable to be connected when the pressure portion is used to heat and pressurize the connection portion. It was done.

すなわち、本発明は第2図に示すようにケーブル導体接
続部の外周にゴム、プラスチックの補強絶縁層を形成せ
しめた後、前記補強絶縁層の外周にヒータを装着し、さ
らにその外側に加圧容器2を包被着装着して加熱加圧す
るか、或いは前記補強絶縁層の外側にヒーターを具備し
た加圧容器2を包被装着して加熱加圧することによりゴ
ム、プラスチック絶縁ケーブルの中間接続部を成形する
方法において、 前記加圧容器2の端部と前記加圧容器2の端部に位置す
るケーブルの表面3、3′との間に断熱スペースー4を
介在させて前記加圧容器2の端部に位置するケーブル表
面3、3′の温度を130℃以下に調整しつつ加熱加圧す
ることを特徴とするものである。
That is, according to the present invention, as shown in FIG. 2, after forming a reinforcing insulating layer of rubber or plastic on the outer circumference of the cable conductor connecting portion, a heater is attached to the outer circumference of the reinforcing insulating layer, and a pressure is applied to the outside. An intermediate connecting portion of a rubber / plastic insulated cable by enclosing and mounting the container 2 for heating and pressurization, or encapsulating and mounting and heating and pressurizing the pressurizing container 2 having a heater on the outside of the reinforcing insulating layer. In the method of molding the pressure container 2 of the pressure container 2 described above, an insulating space 4 is interposed between the end portion of the pressure container 2 and the surfaces 3 and 3 ′ of the cables located at the end portion of the pressure container 2. It is characterized by heating and pressurizing while adjusting the temperature of the cable surfaces 3, 3 ′ located at the ends to 130 ° C. or less.

本発明方法において、加圧容器2端部のケーブル表面3
の温度を130℃以下に限定した理由は、無加圧で130℃ま
で加熱しても絶縁体層は発泡しないが、130℃を越える
と発泡し、このボイドのためにケーブルの電気特性が著
しく低下するためである。
In the method of the present invention, the cable surface 3 at the end of the pressure vessel 2
The reason for limiting the temperature to 130 ° C or lower is that the insulator layer does not foam even when heated to 130 ° C without pressure, but when it exceeds 130 ° C, it foams and the electrical characteristics of the cable remarkably increase. This is because it will decrease.

この130℃以下に保持する方法の具体例を示すと次の如
くである。
A specific example of the method of maintaining the temperature below 130 ° C. is as follows.

(1)加圧容器2として金属製容器を使用する場合に
は、加圧容器2端部と加圧容器2端部に位置するケーブ
ル表面3、3′との間に断熱スペーサー4として例えば
ゴム、プラスチック等の有機断熱材、ガラス繊維等の無
機断熱材或いは有機無機複合断熱材を介在させる。
(1) When a metal container is used as the pressurizing container 2, for example, a rubber is used as the heat insulating spacer 4 between the end of the pressurizing container 2 and the cable surfaces 3 and 3 ′ located at the end of the pressurizing container 2. , An organic heat insulating material such as plastic, an inorganic heat insulating material such as glass fiber, or an organic-inorganic composite heat insulating material is interposed.

次に、本発明の実施例について説明する。Next, examples of the present invention will be described.

実施例(1) 600mm2、154kVのCVケーブルA、Bの2本の各端部を鉛
筆状に削って導体を露出せしめ、露出させた導体相互を
圧縮スリーブでを接続した後、この導体接続部上に半導
電性収縮チューブを用いて内部半導電層を形成した。し
かる後、形成した内部半導電層上に日本ユニカー製HFDJ
4201をベースにしたポリエチレンテープ(厚さ0.2mm、
幅20mm)を巻回し、厚さ25mmの補強絶縁層を、更にその
外側に半導電性収縮チューブを用いて外部半導電層を各
々形成した。
Example (1) Pencil-shaped shaving each of the two ends of the 600 mm 2 , 154 kV CV cables A and B to expose the conductors, and the exposed conductors were connected to each other with a compression sleeve. An internal semiconductive layer was formed on the part using a semiconductive shrinkable tube. After that, on the internal semiconductive layer that was formed, Nippon Unicar HFDJ
Polyethylene tape based on 4201 (thickness 0.2 mm,
A width of 20 mm) was wound, a reinforcing insulating layer having a thickness of 25 mm was formed, and an outer semiconductive layer was formed on the outer side thereof using a semiconductive shrinkable tube.

次いで、前記外部半導電層上にカートリッジヒーターを
埋め込んだ金属製加圧容器を該外部半導電層と金属製容
器端部との間にFPRゴムパッキングを介在せしめた状態
で包被装着し、5kg/cm2の窒素ガス加圧下にて通電加熱
した。この時、前記外部半導電層が210℃になるように1
0時間加熱してポリエチレンテープ巻回絶縁層を溶融一
体化すると共に架橋してケーブル接続部を成形した。な
おこの場合、金属製容器端部の外部半導電層上の温度
は、100℃であった。
Then, a metal pressure container with a cartridge heater embedded on the outer semiconductive layer is attached with an FPR rubber packing interposed between the outer semiconductive layer and the end of the metal container. It was electrically heated under a nitrogen gas pressure of / cm 2 . At this time, the external semiconducting layer should be adjusted to 210 ℃.
The polyethylene tape winding insulation layer was melted and integrated by heating for 0 hour and cross-linked to form a cable connection part. In this case, the temperature on the outer semiconductive layer at the end of the metal container was 100 ° C.

本実施例(1)により成形したケーブル接続部につい
て、交流破壊電圧を測定したところ、交流600kVにて全
く破壊しなかった。
When the AC breakdown voltage was measured for the cable connection portion molded according to this Example (1), it was not broken at 600 kV AC.

実施例(2) 実施例(1)と同様にして形成したケーブル中間接続部
の外部半導電層上にカートリッジヒーターを埋め込んだ
窒化ケイ素焼結体製加圧容器を該外部半導電層と窒化ケ
イ素焼結体製容器端部との間にFPRゴムパッキングを介
在せしめた状態で包被装着し、5kg/cm2の窒素ガス加圧
下にて前記外部半導電層が210℃になるように10時間通
電加熱してポリエチレンテープ巻回絶縁層を溶融一体化
すると共に架橋してケーブル接続部を成形した。なおこ
の場合、前記加圧容器端部に位置するケーブル上にはゴ
ム引き布テープを巻回して加圧容器とケーブルとを断熱
した。これによりケーブル表面の温度は、130℃であっ
た。
Example (2) A pressure vessel made of a silicon nitride sintered body, in which a cartridge heater is embedded on an outer semiconductive layer of a cable intermediate connecting portion formed in the same manner as in Example (1), is provided with the outer semiconductive layer and silicon nitride. Cover with the FPR rubber packing between the end of the sintered body and the end of the container, and press under nitrogen gas of 5 kg / cm 2 for 10 hours so that the outer semiconductive layer becomes 210 ° C. The polyethylene tape winding insulation layer was melted and integrated by heating with electric current and crosslinked to form a cable connection part. In this case, a rubberized cloth tape was wound around the cable located at the end of the pressure vessel to insulate the pressure vessel and the cable from each other. As a result, the temperature of the cable surface was 130 ° C.

本実施例(2)により成形したケーブル接続部につい
て、交流破壊電圧を測定したところ、交流600kVにて何
等破壊を生じなかった。
When the AC breakdown voltage was measured for the cable connection portion molded according to this Example (2), no breakdown occurred at 600 kV AC.

比較例(1) 実施例(1)と同様にして形成したケーブル中間接続部
の外部半導電層上に何ら断熱スペーサーなどを介在させ
ずに、カートリッジヒーターを埋め込んだ金属製加圧容
器を包被装着し、5kg/cm2の窒素ガス加圧下にて前記外
部半導電層が210℃になるように10時間通電加熱してケ
ーブル接続部を成形した。なおこの場合、金属製容器端
部はケーブルの外部半導電層に直接接触しているため、
該容器端部に位置するケーブル表面温度は140℃であっ
た。
Comparative Example (1) A metal pressure container in which a cartridge heater is embedded is covered on the outer semiconductive layer of a cable intermediate connecting portion formed in the same manner as in Example (1) without interposing a heat insulating spacer or the like. After mounting, the cable connection part was formed by electrically heating under external pressure of 5 kg / cm 2 of nitrogen gas for 10 hours so that the outer semiconductive layer was 210 ° C. In this case, since the metal container end is in direct contact with the outer semiconductive layer of the cable,
The surface temperature of the cable located at the end of the container was 140 ° C.

比較例(1)により成形したケーブル接続部について、
交流破壊電圧を測定したところ、交流420kVで接続部近
傍にて破壊を生じた。
Regarding the cable connection portion molded by Comparative Example (1),
When the AC breakdown voltage was measured, a breakdown occurred near the connection at AC 420 kV.

以上詳述した如く、本発明方法によれば良好な電気特性
を有するケーブル接続部を成形し得るものであり、その
実用的価値は極めて有用なものである。
As described in detail above, according to the method of the present invention, a cable connecting portion having good electrical characteristics can be molded, and its practical value is extremely useful.

【図面の簡単な説明】[Brief description of drawings]

第1図は従来のゴム、プラスチック絶縁ケーブルの中間
接続部の成形方法を示す概略説明図、第2図は本発明の
ゴム、プラスチック絶縁ケーブルの中間接続部の成形方
法を示す概略説明図である。 1……接続部分、2……加圧容器、3、3′……ケーブ
ル表面、4……断熱スペーサー。
FIG. 1 is a schematic explanatory view showing a molding method of a conventional intermediate connecting portion of a rubber / plastic insulated cable, and FIG. 2 is a schematic explanatory view showing a molding method of an intermediate connecting portion of a rubber / plastic insulating cable of the present invention. . 1 ... Connection part, 2 ... Pressurized container, 3, 3 '... Cable surface, 4 ... Insulating spacer.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】ケーブル導体接続部の外周にゴム、プラス
チックの補強絶縁層を形成せしめた後、前記補強絶縁層
の外周にヒータを装着し、さらにその外側に加圧容器を
包被着装着して加熱加圧するか、或いは前記補強絶縁層
の外側にヒーターを具備した加圧容器を包被装着して加
熱加圧することによりゴム、プラスチック絶縁ケーブル
の中間接続部を成形する方法において、 前記加圧容器の端部と前記加圧容器の端部に位置するケ
ーブルの表面との間に断熱スペースーを介在させて前記
加圧容器の端部に位置するケーブル表面の温度を130℃
以下に調整しつつ加熱加圧することを特徴とするゴム、
プラスチック絶縁ケーブルの中間接続部の成形方法。
1. A rubber or plastic reinforced insulating layer is formed on the outer periphery of a cable conductor connecting portion, a heater is attached to the outer periphery of the reinforced insulating layer, and a pressure container is attached to the outer side of the heater. In the method of molding the intermediate connection part of the rubber or plastic insulated cable by heating and pressurizing by heating, or by encapsulating and mounting a pressurizing container equipped with a heater on the outside of the reinforcing insulating layer, The temperature of the cable surface located at the end of the pressure vessel is set to 130 ° C. by interposing a heat insulating space between the end of the container and the surface of the cable located at the end of the pressure vessel.
Rubber characterized by heating and pressurizing while adjusting to the following,
Molding method for intermediate connection of plastic insulated cable.
JP57138260A 1982-08-09 1982-08-09 Molding method for intermediate connection of rubber and plastic insulation cable Expired - Lifetime JPH07118355B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57138260A JPH07118355B2 (en) 1982-08-09 1982-08-09 Molding method for intermediate connection of rubber and plastic insulation cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57138260A JPH07118355B2 (en) 1982-08-09 1982-08-09 Molding method for intermediate connection of rubber and plastic insulation cable

Publications (2)

Publication Number Publication Date
JPS5927486A JPS5927486A (en) 1984-02-13
JPH07118355B2 true JPH07118355B2 (en) 1995-12-18

Family

ID=15217778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57138260A Expired - Lifetime JPH07118355B2 (en) 1982-08-09 1982-08-09 Molding method for intermediate connection of rubber and plastic insulation cable

Country Status (1)

Country Link
JP (1) JPH07118355B2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52233B2 (en) * 1972-03-28 1977-01-06
JPS5819887A (en) * 1981-07-29 1983-02-05 住友電気工業株式会社 Method of forming reinforced insulating layer in connector of rubber, plastic insulated wire cable
JPS59171483A (en) * 1983-03-18 1984-09-27 日立電線株式会社 Method of heating polyolefin insulated cable at time of producing connector

Also Published As

Publication number Publication date
JPS5927486A (en) 1984-02-13

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