JPH027247B2 - - Google Patents
Info
- Publication number
- JPH027247B2 JPH027247B2 JP57056930A JP5693082A JPH027247B2 JP H027247 B2 JPH027247 B2 JP H027247B2 JP 57056930 A JP57056930 A JP 57056930A JP 5693082 A JP5693082 A JP 5693082A JP H027247 B2 JPH027247 B2 JP H027247B2
- Authority
- JP
- Japan
- Prior art keywords
- cladding tube
- corrugated
- same
- bending
- aluminum
- 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
Links
Landscapes
- Laying Of Electric Cables Or Lines Outside (AREA)
- Cable Accessories (AREA)
Description
【発明の詳細な説明】
本発明は、電力ケーブルを被覆するアルミニウ
ム波付被覆管の同径接続部の改良に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the same-diameter connection of aluminum corrugated cladding for covering power cables.
従来、電力ケーブルアルミニウム波付被覆管の
同径接続は溶接により行つている。しかし、溶接
熱によるケーブル絶縁紙の焼損などによる電気特
性の劣化が十分に考えられるため、第１図に示す
ような端末構造にし、約５ｍの導体接続部に取り
付ける波付コルゲート管２と溶接していた。 Conventionally, same-diameter connections of power cable aluminum corrugated cladding tubes have been made by welding. However, since it is highly likely that the electrical characteristics will deteriorate due to burnout of the cable insulating paper due to welding heat, the terminal structure shown in Figure 1 is made and welded to the corrugated corrugated pipe 2 attached to the approximately 5 m long conductor connection section. was.
尚、第１図において、１はアルミニウム波付被
覆管、３はケーブルコア、４は平滑化境界部、５
は溶接部、６は平滑化長さである。 In Fig. 1, 1 is an aluminum corrugated cladding tube, 3 is a cable core, 4 is a smoothed boundary, and 5 is a cable core.
is the welding part, and 6 is the smoothing length.
この工法によりアルミニウム波付被覆管１の同
径接続は可能となつたが、平滑化長さ６部分の拡
管平滑化部は加工硬化しているため、アルミニウ
ム波付被覆管本体と曲げ剛性が異なり、曲げ作用
を受けると、平滑化境界部４に曲げ歪が集中し易
い。このため、座屈や亀裂が発生する。 This method makes it possible to connect the aluminum corrugated cladding tube 1 with the same diameter, but since the expanded smoothed portion of the smoothed length 6 portion is work hardened, the bending rigidity differs from that of the aluminum corrugated cladding tube body. , when subjected to a bending action, bending strain tends to concentrate on the smoothed boundary portion 4. This causes buckling and cracking.
本発明は上記の状況に鑑みなされたものであ
り、曲げ特性を向上できるアルミニウム波付被覆
管の同径接続部を提供することを目的としたもの
である。 The present invention was made in view of the above-mentioned situation, and an object of the present invention is to provide a same-diameter connection portion of an aluminum corrugated cladding tube that can improve bending characteristics.
本発明のアルミニウム波付被覆管の同径接続部
は、ケーブルを被覆するアルミニウム波付被覆管
と波付コルゲート管とをそれぞれ平滑状に拡管加
工した端末部で同径接続するものにおいて、上記
アルミニウム波付被覆管の拡管加工部から長手方
向近傍に、該被覆管より曲げ剛性が大きくなるよ
うに加工硬化された加工部を継続的に形成したも
のである。 The same-diameter connection portion of the aluminum corrugated cladding tube of the present invention is one in which the aluminum corrugated cladding tube that covers the cable and the corrugated corrugated tube are connected with the same diameter at the end portions each of which is expanded into a smooth shape. A processed part that is work-hardened so as to have greater bending rigidity than that of the corrugated cladding tube is continuously formed in the vicinity in the longitudinal direction from the expanded part of the corrugated cladding tube.
以下本発明のアルミニウム波付被覆管の同径接
続部の一実施例を第１図と同部品は同符号で示し
第２図により説明する。アルミニウム波付被覆管
１は端末部が第１図と同様に、拡管平滑化工具
（図示せず）により加工され、その後内面がアル
ミニウム波付被覆管１の外形と合され同形状にさ
れた半割り型の平滑化工具（図示せず）にて把持
し軸方向に張力を加えられて曲げ剛性が大きくな
るように加工硬化された加工部７Ａ，７Ｃ，７Ｅ
が形成されている。端末部の平滑化長さ６部分の
加工部７Ｇ及び加工部７Ｅ，７Ｃ，７Ａの相互間
には加工部に比較しアルミニウム波付被覆管１、
そのままの曲げ剛性が小なる本体部８Ｂ，８Ｄ，
８Ｆが配置されている。 Hereinafter, an embodiment of the same-diameter connecting portion of an aluminum corrugated cladding tube according to the present invention will be described with reference to FIG. 2, in which the same parts as in FIG. The end portion of the aluminum corrugated cladding tube 1 is processed using a tube expansion and smoothing tool (not shown) in the same manner as shown in FIG. Processed parts 7A, 7C, and 7E gripped with a split smoothing tool (not shown) and work-hardened to increase bending rigidity by applying tension in the axial direction.
is formed. Compared to the processed parts, aluminum corrugated cladding tube 1,
Main body parts 8B, 8D, which have low bending rigidity as they are,
8F is located.
即ち、加工硬化された加工部と、加工部より曲
げ剛性が小さな本体部とが交互に形成されている
ので、アルミニウム波付被覆管１の同径接続部に
おける座屈は第３図に示す如く解消される。 That is, since work-hardened processed parts and main body parts whose bending rigidity is smaller than the processed parts are formed alternately, buckling at the same-diameter connection part of the aluminum corrugated cladding tube 1 occurs as shown in FIG. It will be resolved.
第３図は曲げ剛性EI（Ｅ：アルミニウムのヤン
グ率、Ｉ：アルミニウム波付被覆管１の断面２次
モーメント）の異なる材料が接続した場合の曲げ
状況の説明図を示す。イは曲げ剛性EI1材料部９
と曲げ剛性EI2材料部１０との曲げ剛性の異なる、
即ち、EIの点で不連続点が接続部で１個である
ため曲げ歪は１個所に集中しロのように鋭角に折
れ曲ることが多く座屈し易い。これに対し、本実
施例の接続部は、ハに示すように、曲げ剛性EI
材料部９と曲げ剛性EI2材料部１０とのEIの点で
の不連続部が多く複数個になるので、多角形状に
曲げ歪は分散し座屈や亀裂が防止される。 FIG. 3 is an explanatory diagram of a bending situation when materials having different bending rigidities EI (E: Young's modulus of aluminum, I: second moment of area of the aluminum corrugated cladding tube 1) are connected. A is bending stiffness EI 1 Material section 9
and bending stiffness EI 2 material part 10 has different bending stiffness,
That is, since there is only one discontinuous point at the connection part in terms of EI, the bending strain is concentrated in one place, and the joint is often bent at an acute angle as shown in (b), making it easy to buckle. On the other hand, the connection part of this example has a bending rigidity EI as shown in c.
Since there are many discontinuous parts in terms of EI between the material part 9 and the bending rigidity EI 2 material part 10, bending strain is dispersed in a polygonal shape and buckling and cracking are prevented.
このように本実施例のアルミニウム波付被覆管
の同径接続部は、剛性の異なる不連続点を複数個
を設けたもので曲りが分散され、座屈、亀裂の発
生を防止できる。 As described above, the same-diameter connection portion of the aluminum corrugated cladding tube of this embodiment has a plurality of discontinuous points having different rigidities, so that bending is dispersed and buckling and cracking can be prevented.
第４図は他の実施例を示し、上記実施例と異る
ところは、上記実施例はアルミニウム波付被覆管
１を任意の区間の複数個所を引き伸ばして平滑部
を形成し曲げ剛性を大きくしたのに対し、本実施
例は逆に縮めて波ピツチ縮少加工部１２を所定ピ
ツチ毎に複数個所設けたものであり、上記実施例
と同様の作用効果を有する。 Fig. 4 shows another embodiment, which differs from the above embodiment in that the aluminum corrugated cladding tube 1 is stretched at multiple points in an arbitrary section to form smooth parts and increase bending rigidity. On the other hand, in this embodiment, a plurality of wave pitch reduction processing portions 12 are provided at predetermined pitches by conversely reducing the wave pitch, and has the same effect as the above embodiment.
以上記述した如く本発明のアルミニウム波付被
覆管の同径接続部は曲げ特性を向上し座屈や亀裂
を防止できる効果を有するものである。 As described above, the same-diameter connection portion of the aluminum corrugated cladding tube of the present invention has the effect of improving bending properties and preventing buckling and cracking.
第１図は従来のアルミニウム波付被覆管の同径
接続部の断面図、第２図は本発明のアルミニウム
波付被覆管の同径接続部の実施例の断面図、第３
図はアルミニウム波付被覆管の同径接続部の曲げ
状況を示し、イは従来の同径接続部の端部説明
図、ロはイの曲がり状況説明図、ハは第２図の同
径接続部の端部説明図、ニはハの曲がり状況説明
図、第４図は本発明のアルミニウム波付被覆管の
同径接続部の他の実施例要部断面図である。
１：アルミニウム波付被覆管、２：波付コルゲ
ート管、３：ケーブルコア、５：溶接部、７Ａ，
７Ｃ，７Ｅ，７Ｇ：加工部、８Ｂ，８Ｄ８Ｆ：本
体部、１２：波付ピツチ縮小加工部。
FIG. 1 is a cross-sectional view of the same-diameter connection portion of a conventional aluminum corrugated cladding tube, FIG. 2 is a cross-sectional view of an embodiment of the same-diameter connection portion of an aluminum corrugated cladding tube of the present invention, and FIG.
The figure shows the bending condition of the same-diameter connection of aluminum corrugated cladding pipe, A is an explanatory diagram of the end of the conventional same-diameter connection, B is an explanatory diagram of the bending condition of A, and C is the same-diameter connection in Fig. 2. Fig. 4 is an explanatory view of the end portion of Fig. 1, Fig. 4 is an explanatory view of the bending state of Fig. 4, and Fig. 4 is a sectional view of the main part of another embodiment of the same diameter connection portion of the aluminum corrugated cladding tube of the present invention. 1: Aluminum corrugated cladding tube, 2: Corrugated corrugated tube, 3: Cable core, 5: Welded part, 7A,
7C, 7E, 7G: Processed part, 8B, 8D8F: Main body part, 12: Corrugated pitch reduction processed part.
Claims (1)
と波付コルゲート管とをそれぞれ平滑状に拡管加
工した端末部で同径接続するものにおいて、上記
アルミニウム波付被覆管の拡管加工部から長手方
向近傍に、該被覆管より曲げ剛性が大きくなるよ
うに加工硬化された加工部を継続的に形成したこ
とを特徴とするアルミニウム波付被覆管の同径接
続部。1 In a device in which an aluminum corrugated cladding tube and a corrugated corrugated tube that cover a cable are connected with the same diameter at the end portions each of which has been expanded into a smooth shape, in the vicinity in the longitudinal direction from the expanded portion of the aluminum corrugated cladding tube, A co-diameter connecting portion of an aluminum corrugated cladding tube, characterized in that a work-hardened processed portion is continuously formed so that the bending rigidity is greater than that of the cladding tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57056930A JPS58175917A (en) | 1982-04-06 | 1982-04-06 | Connected of same diameter of coating tube with aluminum wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57056930A JPS58175917A (en) | 1982-04-06 | 1982-04-06 | Connected of same diameter of coating tube with aluminum wave |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58175917A JPS58175917A (en) | 1983-10-15 |
| JPH027247B2 true JPH027247B2 (en) | 1990-02-16 |
Family
ID=13041221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57056930A Granted JPS58175917A (en) | 1982-04-06 | 1982-04-06 | Connected of same diameter of coating tube with aluminum wave |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58175917A (en) |
-
1982
- 1982-04-06 JP JP57056930A patent/JPS58175917A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58175917A (en) | 1983-10-15 |
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