JP3792563B2 - Expanded diameter support pipe used for the method of forming the connection part of plastic insulated power cable - Google Patents
Expanded diameter support pipe used for the method of forming the connection part of plastic insulated power cable Download PDFInfo
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- JP3792563B2 JP3792563B2 JP2001347325A JP2001347325A JP3792563B2 JP 3792563 B2 JP3792563 B2 JP 3792563B2 JP 2001347325 A JP2001347325 A JP 2001347325A JP 2001347325 A JP2001347325 A JP 2001347325A JP 3792563 B2 JP3792563 B2 JP 3792563B2
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- Prior art keywords
- support pipe
- pipe
- divided
- diameter
- connection part
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- 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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Description
【０００１】
【発明の属する技術分野】
本発明は、あらかじめ成形されたゴム絶縁筒を拡径してケーブルに挿通し、ケーブル導体接続部上に装着するＣＶケーブル等のプラスチック絶縁電力ケーブルの接続部形成方法に用いる拡径支持部材の提供に関する。
【０００２】
【従来の技術】
ＣＶケーブル等の接続部において、近年、接続時間が短く、簡単に接続可能な、内部半導電層、絶縁層、外部半導電層で形成されたゴム絶縁筒を用いた接続部が、多く用いられている。この接続部の形成において、導体接続部の上に前記のゴム絶縁筒を被せる場合、施工前に電力ケーブルの外径より大きく拡径してケーブル上に被挿し後、ケーブルの導体接続を行い、この導体接続部上に当該ゴム絶縁筒を収縮施工することが行われている。
【０００３】
しかして、ゴム絶縁筒の拡径及び収縮は、ゴム絶縁筒の中に拡径パイプを装填しておき、これを引き抜くことで収縮するようにしている。
【０００４】
【発明が解決しようとする課題】
上述のような接続部形成において、接続作業スペースの縮小化のニーズが大きい。この作業の例として、特開平９−２００９２５号公報に示されるように、拡径パイプを軸方向に２分割し、引抜きに際しては、それぞれのパイプの外部端部に設けた引抜き手段により、それぞれ軸方向に個別に反対方向に引抜く方法が開示されている。この方法は接続作業スペースの縮小化のニーズに或る程度寄与するものであるが、作業能率の面からは同一方向に引き抜く方がよい。また、引き抜きの際に、拡径パイプの引き抜き終り端部にエッジが発生した場合にはゴム絶縁筒内面が損傷する恐れがある。
【０００５】
本発明の目的は、拡径パイプを用いた電力ケーブルの接続部の形成において、接続作業スペースの縮小化と作業コストの低減を図ることができるとともに、接続部の品質面での危惧のない電力ケーブルの接続方法に用いる拡径支持パイプを提供することにある。
【０００６】
【課題を解決するための手段】
本発明により提供するプラスチック絶縁電力ケーブルの接続部形成方法において用いる拡径支持パイプは、長て方向に分割可能であり、及びそれぞれが半円状に縦割可能であり、この分割パイプの引き抜き方向の前端の外周に凸面と凹面を設け、後端の内周に凸面と凹面を設けて各分割パイプの長手方向の引っ掛け構造を形成してあり、かつ最終の分割パイプの後端に、前記ゴム絶縁筒内面の応力集中を緩和するためのスロープ部材を取り付けていることを特徴とするものである。
【０００９】
【発明の実施の形態】
本発明の実施の形態を図面を参照しながら説明する。図３は本発明の接続部の形成方法において、ゴム絶縁筒に拡径支持パイプを挿入する工程の説明図である。図において、拡径支持パイプ１は長て方向に３分割１ａ，１ｂ，１ｃされており、先端には尖頭部材２を具えられており、後端には押し部材３により支持されておる。押し部材３には自在キャスター（４）が具えられて移動可能となっており、拡径支持パイプ１の内部に通された油圧シリンダからの延長棒５に固定されておる。油圧シリンダ６を操作することにより、押し部材３は図の左方向へ移動し、ゴム絶縁筒１０は拡径支持パイプ１の尖頭部材２を経て、拡径支持パイプ１上に挿入されていく。この際、油圧シリンダからの延長棒５は芯出しされた状態であり、拡径支持パイプ１は水平に挿入される。なお、符号７は拡径ヘッド支持金具である。
【００１０】
図１は本発明の接続部の形成方法において、拡径支持パイプにより拡径されたゴム絶縁筒がケーブル導体接続部上に位置せしめた後、前記拡径支持パイプを引抜く工程の説明図である。なお、上述した図３と同一部位には同一符号を付してある。ゴム絶縁筒１０をケーブル導体接続部Ａ上に位置せしめた後、拡径支持パイプ１の分割された引抜き方向先端のパイプ１ａの端部に環状フランジ１２を取付け、環状フランジ１２には油圧シリンダー６の押し棒５が固定されて矢印の方向に引抜いていく。そして、分割位置が現れたとき、パイプ１ａを取り外す。同様にして、分割位置が現れたとき、パイプ１ｂを取り外す。
【００１１】
また、拡径支持パイプ１の最終分割パイプであるパイプ１ｃの後端にスロープ部材１１を取り付けられる。このスロープ部材１１は、引き抜く際に、ゴム絶縁筒１０の内面が拡径支持パイプ１のエッジで傷がつかないようにするためにゴム絶縁筒１０内面の応力集中を緩和するものである。
【００１２】
また、分割パイプ１ａ，１ｂ，１ｃは、図２に示すように、引き抜き方向の前端外周に凸面２１と凹面２２を設けられ、後端内周に凸面２３と凹面２４を設けて、長手方向の引っ掛け構造が形成されている。さらに、図の（ロ）に示すように各分割パイプは縦に半割可能となっている。
【００１３】
各分割パイプは上述のような構成であるので、引き抜きの過程で順次分割パイプを取り外すことが容易となる。
【００１４】
このようにして、拡径支持パイプ１が引抜かれたゴム絶縁筒１０は自己収縮力により収縮して、導体接続部Ａ及びケーブル絶縁体Ｂ上に密着して装着される。
【００１５】
【発明の効果】
以上説明したように、本発明によれば、拡径支持パイプが長て方向に少なくとも２分割可能とされ、拡径支持パイプを引き抜きながら分割位置が現れたとき、順次分割パイプを取り外し可能としたので、例えば油圧シリンダーの動力を使用する場合、シリンダーのストローク長さは短くてすみ、機器を小型化できるとともに、作業スペースを縮小化できる。さらに、拡径支持パイプは何度も使用できる。
【図面の簡単な説明】
【図１】本発明の絶縁部の形成方法において、ゴム絶縁筒から拡径支持パイプを引き抜く工程の説明図である。
【図２】本発明の接続部の形成方法において用いられる拡径支持パイプを構成する分割パイプの断面図である。
【図３】本発明の接続部の形成方法において、ゴム絶縁筒に拡径支持パイプを挿入する工程の説明図である。
【符号の説明】
１ 拡径支持パイプ
２ 尖頭部材
３ 押し部材
４ 自在キャスター
５ 油圧シリンダー延長棒
６ 油圧シリンダー
７ 拡径ヘッド支持金具
１０ ゴム絶縁筒
１１ スロープ部材
１２ 環状フランジ[0001]
BACKGROUND OF THE INVENTION
The present invention provides a diameter-enlarged support member for use in a method of forming a connection part of a plastic insulated power cable such as a CV cable that is expanded on a diameter of a pre-formed rubber insulation cylinder, inserted into the cable, and mounted on the cable conductor connection part. About.
[0002]
[Prior art]
In connection parts such as CV cables, in recent years, connection parts using a rubber insulating cylinder formed of an internal semiconductive layer, an insulating layer, and an external semiconductive layer, which can be easily connected with a short connection time, are often used. ing. In the formation of this connection part, when covering the rubber insulating tube on the conductor connection part, after the diameter is larger than the outer diameter of the power cable before construction and inserted on the cable, the conductor connection of the cable is performed, The rubber insulating cylinder is contracted on the conductor connection portion.
[0003]
Thus, the diameter and contraction of the rubber insulating cylinder are such that the diameter-expanding pipe is loaded in the rubber insulating cylinder and is pulled out to contract.
[0004]
[Problems to be solved by the invention]
In forming the connection part as described above, there is a great need for reducing the connection work space. As an example of this work, as shown in Japanese Patent Application Laid-Open No. 9-200925, the diameter-expanded pipe is divided into two in the axial direction, and when pulling, the pulling means provided at the outer end of each pipe is used to pull the shaft. A method of individually pulling in the opposite direction to the direction is disclosed. This method contributes to some extent to the need to reduce the connection work space, but it is better to pull out in the same direction from the viewpoint of work efficiency. Further, when an edge is generated at the end of drawing of the diameter-expanded pipe during drawing, the inner surface of the rubber insulating cylinder may be damaged.
[0005]
The object of the present invention is to reduce the connection work space and reduce the work cost in the formation of the connection portion of the power cable using the diameter-expanded pipe, as well as the power with no concern about the quality of the connection portion. An object of the present invention is to provide an enlarged diameter support pipe used for a cable connection method.
[0006]
[Means for Solving the Problems]
The diameter-enlarged support pipe used in the method for forming a connection part of a plastic insulated power cable provided by the present invention can be divided in a long direction, and each can be divided vertically in a semicircular shape, and the drawing direction of this divided pipe A convex surface and a concave surface are provided on the outer periphery of the front end, and a convex structure and a concave surface are provided on the inner periphery of the rear end to form a hook structure in the longitudinal direction of each divided pipe , and the rubber is provided at the rear end of the final divided pipe. A slope member for relaxing stress concentration on the inner surface of the insulating cylinder is attached .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 3 is an explanatory diagram of a step of inserting a diameter-enlarged support pipe into a rubber insulating cylinder in the method for forming a connection portion of the present invention. In the figure, the diameter-enlarged
[0010]
FIG. 1 is an explanatory view of a process of pulling out the expanded support pipe after the rubber insulating cylinder expanded by the expanded support pipe is positioned on the cable conductor connection section in the method of forming the connection section of the present invention. is there. In addition, the same code | symbol is attached | subjected to the same site | part as FIG. 3 mentioned above. After the rubber insulating cylinder 10 is positioned on the cable conductor connection portion A, an annular flange 12 is attached to the end of the
[0011]
Further, the slope member 11 is attached to the rear end of the
[0012]
Also,
[0013]
Since each divided pipe is configured as described above, it becomes easy to remove the divided pipes sequentially in the process of drawing.
[0014]
In this manner, the rubber insulating cylinder 10 from which the diameter-enlarged
[0015]
【The invention's effect】
As described above, according to this onset bright, expanded support pipe is at least 2 can be divided into long and direction, when the dividing position while pulling the enlarged support pipe appeared, detachable sequentially divided pipe Therefore, for example, when using the power of a hydraulic cylinder, the stroke length of the cylinder can be short, and the apparatus can be miniaturized and the working space can be reduced. Furthermore, the expanded diameter support pipe can be used many times.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a process of pulling out a diameter-enlarged support pipe from a rubber insulating cylinder in the method for forming an insulating portion according to the present invention.
FIG. 2 is a cross-sectional view of a divided pipe constituting a diameter-enlarged support pipe used in the method for forming a connection portion of the present invention.
FIG. 3 is an explanatory diagram of a step of inserting a diameter-enlarged support pipe into a rubber insulating cylinder in the method for forming a connection portion according to the present invention.
[Explanation of symbols]
DESCRIPTION OF
Claims (1)
拡径支持パイプが長て方向に分割可能であり、及びそれぞれが半円状に縦割可能であり、この分割パイプの引き抜き方向の前端の外周に凸面と凹面を設け、後端の内周に凸面と凹面を設けて各分割パイプの長手方向の引っ掛け構造を形成してあり、かつ最終の分割パイプの後端に、前記ゴム絶縁筒内面の応力集中を緩和するためのスロープ部材を取り付けていることを特徴とする拡径支持パイプ。In the diameter expansion support pipe used for the connection method in the form of shrinking construction on the conductor connection part of the power cable, the rubber insulation cylinder expanded in diameter before construction,
The expansion support pipe is long and can be divided in the direction, and each can be divided in a semicircular shape, and a convex surface and a concave surface are provided on the outer periphery of the front end in the drawing direction of the divided pipe, and the inner periphery of the rear end is provided. A convex structure and a concave surface are provided to form a hooking structure in the longitudinal direction of each divided pipe , and a slope member for reducing stress concentration on the inner surface of the rubber insulating cylinder is attached to the rear end of the final divided pipe . Expanded support pipe characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001347325A JP3792563B2 (en) | 2001-11-13 | 2001-11-13 | Expanded diameter support pipe used for the method of forming the connection part of plastic insulated power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001347325A JP3792563B2 (en) | 2001-11-13 | 2001-11-13 | Expanded diameter support pipe used for the method of forming the connection part of plastic insulated power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003153423A JP2003153423A (en) | 2003-05-23 |
| JP3792563B2 true JP3792563B2 (en) | 2006-07-05 |
Family
ID=19160343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001347325A Expired - Fee Related JP3792563B2 (en) | 2001-11-13 | 2001-11-13 | Expanded diameter support pipe used for the method of forming the connection part of plastic insulated power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3792563B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6418025B2 (en) * | 2015-03-25 | 2018-11-07 | 住友電気工業株式会社 | Insulating cylinder diameter expanding method, power cable connecting unit manufacturing method, and insulating cylinder diameter expanding apparatus |
-
2001
- 2001-11-13 JP JP2001347325A patent/JP3792563B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003153423A (en) | 2003-05-23 |
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