JPS61102110A - Method of removing protective tube of cable connecting section - Google Patents

Method of removing protective tube of cable connecting section

Info

Publication number
JPS61102110A
JPS61102110A JP59222829A JP22282984A JPS61102110A JP S61102110 A JPS61102110 A JP S61102110A JP 59222829 A JP59222829 A JP 59222829A JP 22282984 A JP22282984 A JP 22282984A JP S61102110 A JPS61102110 A JP S61102110A
Authority
JP
Japan
Prior art keywords
protective tube
tube
protection tube
injection hole
connecting section
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
Application number
JP59222829A
Other languages
Japanese (ja)
Inventor
石井 友三
野崎 久晴
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.)
Fujikura Ltd
Original Assignee
Fujikura 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 Fujikura Ltd filed Critical Fujikura Ltd
Priority to JP59222829A priority Critical patent/JPS61102110A/en
Publication of JPS61102110A publication Critical patent/JPS61102110A/en
Pending legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 [産業上の利用分野] Cvケーブルなどのように、接続部の内部に混和物を充
填したケーブルにおいて、接続部内部の点検や、接続部
の解体・再接続などの必要が生じた場合、保護管を取外
さなければならない。
[Detailed Description of the Invention] [Industrial Application Field] In cables such as Cv cables, in which the inside of the connection part is filled with an admixture, inspection of the inside of the connection part, disassembly and reconnection of the connection part, etc. If necessary, the protective tube must be removed.

この発明は、そのような場合における保護管の取外し方
法に関するものである。
The present invention relates to a method for removing a protective tube in such a case.

[従来の技術] 第3図はCVケーブルの中間接続部を示し。[Conventional technology] Figure 3 shows the intermediate connection of the CV cable.

10はケーブルシース、12はケーブル絶縁体、14は
導体接続管、16は補強絶縁層、18は防水用の混和物
である。20は銅の保護管で、中央で連結しである。2
1は継ぎ目を示し、その上には鉛工31が施されている
。30は防水テープである。
10 is a cable sheath, 12 is a cable insulator, 14 is a conductor connecting tube, 16 is a reinforcing insulating layer, and 18 is a waterproofing compound. 20 is a copper protection tube connected at the center. 2
1 indicates a joint, on which lead work 31 is applied. 30 is a waterproof tape.

なお、継ぎ目は、鋼管にフランジを設はボルト締めする
場合もある。
Note that the joints may be made by installing flanges on the steel pipes or tightening them with bolts.

保護管20を取外す場合、従来は、それを上下に二つ割
りにし、専用工具を使い、開いて剥ぎとるようにしてい
た。
Conventionally, when removing the protective tube 20, the protective tube 20 was divided into upper and lower halves, and a special tool was used to open and peel it off.

[解決しようとする問題点] 上記のようにして保護管20を剥ぎとると、(1)保護
管20の再使用ができない。
[Problems to be Solved] If the protective tube 20 is stripped off as described above, (1) the protective tube 20 cannot be reused.

(2)代りの新しい保護管20を組込むために、単なる
内部点検の場合であっても、 ・補強絶縁層16の撤去、 Φ導体接続管14の切断撤去、 ・導体接続管14の再接続、 ・補強絶縁層16の新規形成、 の追加作業が必要になる。
(2) In order to install a new protective tube 20 instead, even in the case of a simple internal inspection, - Removal of the reinforcing insulating layer 16, Cutting and removal of the Φ conductor connection pipe 14, - Reconnection of the conductor connection pipe 14,・Additional work such as forming a new reinforcing insulating layer 16 will be required.

ところで、もし保護管20を中央から左右に分け、それ
ぞれをケーブルシースlOの上まで引抜いて移動させる
ことができれば、上記の問題は解消できるが、下記の理
由により、それはできなかった。
By the way, if the protective tube 20 could be divided into left and right parts from the center and each part could be pulled out and moved above the cable sheath 10, the above problem could be solved, but this was not possible for the following reasons.

すなわち、混和物18は保護管20の内壁や補強絶縁層
16などに密着しているため、保護管20を無理に左右
に引っ張ると、補強絶縁層16も一緒に引っ張られて変
形する。また混和物18に密着しているケーブルシース
10やケーブル防食層なども変形する恐れがあるからで
ある。
That is, since the mixture 18 is in close contact with the inner wall of the protective tube 20, the reinforcing insulating layer 16, etc., if the protective tube 20 is forcibly pulled from side to side, the reinforcing insulating layer 16 is also pulled and deformed. This is also because the cable sheath 10, cable anti-corrosion layer, etc. that are in close contact with the mixture 18 may also be deformed.

この発明は、以上の問題を解決し、保護管20自体や内
部構造に損傷を与えることなく、保護管20を左右に引
分けることのでき方法の提供を目的とするものである。
The object of the present invention is to solve the above problems and provide a method by which the protective tube 20 can be separated into left and right sides without damaging the protective tube 20 itself or its internal structure.

[問題点を解決するための手段] 第1図、第2図のように、 (1)保護管20のほぼ中央部の連結を解除すること。[Means for solving problems] As shown in Figures 1 and 2, (1) Release the connection at approximately the center of the protection tube 20.

(2)保護管20内に流体を吹込んで、保護管と混和物
18とを剥離させ、その後、保護管を左右両方向に引っ
張ること、 を特徴とする。
(2) A fluid is blown into the protection tube 20 to separate the protection tube and the mixture 18, and then the protection tube is pulled in both left and right directions.

保護管20の連結を解除するのは、その内に流体を吹込
む前でもよいし、後でもよい。
The protection tube 20 may be disconnected before or after the fluid is blown into it.

[実施例] (1)始めに、保護管20の両端の防水テープ30を除
去しく第3図参照)、保護管20とケーブルシース10
間のスペーサ(図示せず)も除去する。また注入孔22
A、B内の混和物工8も除去する(第1図)。
[Example] (1) First, remove the waterproof tape 30 at both ends of the protection tube 20 (see FIG. 3), and remove the protection tube 20 and cable sheath 10.
The intervening spacer (not shown) is also removed. In addition, the injection hole 22
The admixtures 8 in A and B are also removed (Fig. 1).

(2)片方の注入孔22Aに、乾燥空気注入用のバルブ
32を取付る。34は空気ボンベ、36は圧力計である
。他側の注入孔22Bは閉鎖し、圧力計36だけ接続し
ておく。
(2) Attach the dry air injection valve 32 to one injection hole 22A. 34 is an air cylinder, and 36 is a pressure gauge. The injection hole 22B on the other side is closed and only the pressure gauge 36 is connected.

そして、注入孔22Aから加圧した空気を吹込む。Then, pressurized air is blown into the injection hole 22A.

空気は密着している混和物18と保護管20との間を剥
離させながら四方に広がるが、やがて注入孔22Aから
最も近い保護管端部24とケーブルシース10間の隙間
から吹出し、鎖線38のような空気の流れができる#暫
くの間空気の吹流しをすると、未剥離の部分も次第に少
なくなる。
The air spreads in all directions while separating the admixture 18 and the protection tube 20, which are in close contact with each other, but eventually blows out from the gap between the protection tube end 24 and the cable sheath 10, which is closest to the injection hole 22A, and reaches the point indicated by the chain line 38. If you blow air for a while, the unpeeled area will gradually decrease.

(3)次に注入孔22Aを閉鎖し、バルブ32を他側の
注入孔22Bに取付け、上記同様に加圧空気を吹込み、
かつ暫くの間吹流しする。
(3) Next, close the injection hole 22A, attach the valve 32 to the injection hole 22B on the other side, and blow in pressurized air in the same manner as above.
And let the windsock flow for a while.

すると、主に、注入孔22Bと保護管端部26までの間
において、混和物18と保護管20との間に剥離が生ず
る。
Then, separation occurs between the mixture 18 and the protection tube 20 mainly between the injection hole 22B and the protection tube end 26.

(4)次に保護管20の両端24.26とも、たとえば
テーピングなどによりシールする。注入孔22Aを開き
、注入孔22Bから空気を吹込み、注入孔22Aから吹
出させ、かつ暫くの間吹流しする。
(4) Next, both ends 24 and 26 of the protection tube 20 are sealed by, for example, taping. The injection hole 22A is opened, air is blown in through the injection hole 22B, air is blown out from the injection hole 22A, and air is blown out for a while.

すると、注入孔22A、B間において混和物18の21
1#が生じ、結局、保護管20内面の全域において混和
物18との間に剥離が生ずる。
Then, between the injection holes 22A and 22B, 21 of the mixture 18
1# occurs, and eventually peeling occurs between the protective tube 20 and the mixture 18 over the entire inner surface.

(5)次に、継ぎ目21上の鉛工31を除去する6それ
から保護管20上にゴムテープを巻いて(図示省略)、
その上にロープ40をかけ(第2図)、チェーンブロッ
ク42によって保護管20を左右に引っ張ってケーブル
シース10間まで移動させる。
(5) Next, remove the leadwork 31 on the seam 21 6 Then wrap rubber tape over the protection tube 20 (not shown),
A rope 40 is placed over it (FIG. 2), and the protective tube 20 is pulled left and right by the chain block 42 to move it between the cable sheaths 10.

以上で保護管20の取外しは終了する。This completes the removal of the protection tube 20.

なお44はマンホールの内壁、46は張力計である。Note that 44 is the inner wall of the manhole, and 46 is a tension meter.

なお、空気以外の気体および油などの液体も使用するこ
とができる。
Note that gases other than air and liquids such as oil can also be used.

[発明の効果] 保護管中央部の連結を解除するとともに、前記保護管内
に流体を吹込んで、保護管と混和物とを剥離させ、その
後保護管を左右両方向に引っ張るようにするので、 (1)保護管20および内部構造に損傷を与えずに保護
管20を引抜くことができる。
[Effects of the Invention] The connection at the center of the protection tube is released, fluid is blown into the protection tube to separate the protection tube and the mixture, and the protection tube is then pulled in both left and right directions. ) The protective tube 20 can be pulled out without damaging the protective tube 20 and its internal structure.

(2)保護管20を再使用するとかできるので、新しい
保3%v20を送り込むための上記追加作業(導体接続
管14.補強絶縁層16の解体と再構成)をする必要が
なくなる。
(2) Since the protection tube 20 can be reused, there is no need to perform the above-mentioned additional work (disassembly and reconfiguration of the conductor connection tube 14 and reinforcing insulating layer 16) for feeding a new protective tube 20.

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

第1図と第2図は本発明の実施例の方法を工程順の示す
説明図、 第を3図はC■ケーブルの中間接続部の一般的説明図で
ある。 lO:ケーブルシース 14:導体接続管16:補強絶
縁層   18:混和物 20:保護管     2に継ぎ目 22A、B:注入孔  34:空気ボンベ特許出願人 
 藤倉電線株式会社 代・理 入 国 平 啓 次 第1図 第2図 第3図
FIGS. 1 and 2 are explanatory diagrams showing the process order of a method according to an embodiment of the present invention, and FIGS. 3A and 3B are general explanatory diagrams of an intermediate connection part of a C■ cable. lO: Cable sheath 14: Conductor connection tube 16: Reinforcement insulating layer 18: Admixture 20: Protective tube 2 with joints 22A, B: Injection hole 34: Air cylinder patent applicant
Fujikura Electric Cable Co., Ltd., Director Kei Kunidaira Figure 1 Figure 2 Figure 3

Claims (1)

【特許請求の範囲】[Claims] 長手方向のほぼ中央で連結した保護管を使用し、かつそ
の内部に混和物を充填したケーブル接続部において、前
記保護管を取外すに際して、前記保護管中央部の連結を
解除するとともに、前記保護管内に流体を吹込んで、保
護管と混和物との間を剥離させ、その後、保護管を左右
両方向に引っ張ることを特徴とする、ケーブル接続部の
保護管の取外し方法。
In a cable connection part that uses protective tubes that are connected at approximately the center in the longitudinal direction and is filled with a mixture, when removing the protective tube, the connection at the center of the protective tube is released, and the inside of the protective tube is A method for removing a protective tube from a cable connection, which comprises blowing fluid into the tube to separate the protective tube from the mixture, and then pulling the protective tube in both left and right directions.
JP59222829A 1984-10-23 1984-10-23 Method of removing protective tube of cable connecting section Pending JPS61102110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59222829A JPS61102110A (en) 1984-10-23 1984-10-23 Method of removing protective tube of cable connecting section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59222829A JPS61102110A (en) 1984-10-23 1984-10-23 Method of removing protective tube of cable connecting section

Publications (1)

Publication Number Publication Date
JPS61102110A true JPS61102110A (en) 1986-05-20

Family

ID=16788559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59222829A Pending JPS61102110A (en) 1984-10-23 1984-10-23 Method of removing protective tube of cable connecting section

Country Status (1)

Country Link
JP (1) JPS61102110A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891866A (en) * 1987-08-11 1990-01-09 Yoshida Kogyo K. K. Buckle of synthetic resin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891866A (en) * 1987-08-11 1990-01-09 Yoshida Kogyo K. K. Buckle of synthetic resin

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