JPS6032422B2 - Metal sheath connection method for aerial cables - Google Patents
Metal sheath connection method for aerial cablesInfo
- Publication number
- JPS6032422B2 JPS6032422B2 JP54145228A JP14522879A JPS6032422B2 JP S6032422 B2 JPS6032422 B2 JP S6032422B2 JP 54145228 A JP54145228 A JP 54145228A JP 14522879 A JP14522879 A JP 14522879A JP S6032422 B2 JPS6032422 B2 JP S6032422B2
- Authority
- JP
- Japan
- Prior art keywords
- ring
- adapter ring
- collar
- sheath
- test hole
- 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
- Processing Of Terminals (AREA)
- Installation Of Bus-Bars (AREA)
- Gas Or Oil Filled Cable Accessories (AREA)
Description
【発明の詳細な説明】
本発明は金属製シース内に導体を絶縁支持し6弗化硫黄
(SFB)ガス等の絶縁性ガスを封入し、シースと導体
とを絶縁する管絡気中ケーブルの金属シースの気密接続
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube-bound aerial cable in which a conductor is insulated and supported within a metal sheath and an insulating gas such as sulfur hexafluoride (SFB) gas is filled in to insulate the sheath and the conductor. This paper relates to a hermetic connection method for metal sheaths.
管路気中ケーブルの金属シース内に封入する6弗化硫黄
ガスは通常2.5〜50k9/めの圧力で封入し絶縁体
とするので金属シースがこの圧力に耐えなければならな
いことは勿論、金属シースの接合部もこの圧力に耐えて
気密を保持し、微少な漏洩もない構造としなければなら
ない。このため金属シースは一般に溶接接合されている
。又6弗化硫黄ガスは清浄度が低下すると絶縁特性が低
下するので溶接時に発生するスパッタがシース内へ侵入
しないようにする必要があり、溶接部よりシース内部寄
りの位置に弾性を有する○リングを介在させ之を締め付
けて気密保持とスパッタの侵入防止を行っている。しか
し0リングや之を押圧する面に傷があったり、異物を挟
み込むと気密保持やスパッタの侵入を防止できなくなる
。従って絶縁ガスの清浄性を保ち気密を保持するために
は溶接前に○リングによる気密性を確することが望まれ
る。本発明は溶接前に溶接予定個所を仮気密して気密試
験を行ない溶接後、溶接部の気密性を確認して試験孔を
完全密封する金属シースの接続法を提供するもので之を
添付図面に示す実施例について説明すると、接合する金
属シース1,1にそれぞれ締め付け環2、環状ゴムパッ
キング3,内周に段部4を形成したアダプタリング5を
外接し、締め付け環2とアダプタリング5の接合面内周
に形成した環状簿6内にゴムパツキング3を鉄合させ、
更に弾性を有するゴム製の○リング7をシース1に外鼓
して之をァダプタリング5の段部4によって形成された
空室8内に収納し、接合する両シ−ス上に外装したカラ
ー9の両端を前記空室8内に挿入して○リング7をカラ
ー側端と段部4により挟み込む。The sulfur hexafluoride gas sealed in the metal sheath of a conduit aerial cable is normally sealed at a pressure of 2.5 to 50 k9/m to form an insulator, so of course the metal sheath must withstand this pressure. The joints of the metal sheaths must also withstand this pressure, maintain airtightness, and have a structure that prevents even the slightest leakage. For this reason, metal sheaths are generally welded together. In addition, as the cleanliness of sulfur hexafluoride gas decreases, the insulating properties decrease, so it is necessary to prevent spatter generated during welding from entering the sheath. is interposed and tightened to maintain airtightness and prevent spatter from entering. However, if there is a scratch on the O-ring or the surface that presses it, or if a foreign object is caught, it will not be possible to maintain airtightness or prevent spatter from entering. Therefore, in order to maintain the cleanliness of the insulating gas and maintain airtightness, it is desirable to ensure airtightness with a circle ring before welding. The present invention provides a metal sheath connection method in which the area to be welded is temporarily airtight before welding, an airtightness test is performed, and after welding, the airtightness of the welded area is confirmed and the test hole is completely sealed. To explain the embodiment shown in FIG. 1, metal sheaths 1 and 1 to be joined are each circumscribed with a tightening ring 2, an annular rubber packing 3, and an adapter ring 5 having a step 4 formed on the inner periphery. The rubber packing 3 is iron-fitted within the annular groove 6 formed on the inner periphery of the joint surface.
Furthermore, an elastic ○ ring 7 made of rubber is attached to the sheath 1 and housed in the cavity 8 formed by the step 4 of the adapter ring 5, and a collar 9 is placed on both sheaths to be joined. Both ends of the ring 7 are inserted into the empty chamber 8, and the ring 7 is sandwiched between the collar side end and the stepped portion 4.
アダブタリング5の内周には環状の凹溝10を形成し同
溝か外部に通ずる試験孔11と空室8内に通ずる試験孔
12の2個の試験孔がァダプタリング5の段部4の両側
に形成されており、両側の締め付け環2,2に挿通され
た綿付ボルト13によりアダプタリング5とゴムパツキ
ング3を締め付けて、0リング7をアダプタリング5の
毅部4とカラー9の端面で締め付けて気密状態の仮接合
を行ない、溶接予定個所であるアダプタリング5の内側
とカラー9の外周表面を弾力性の強いゴムパッキング1
4で被覆密閉し、締め付けバンドー5により繁続して溶
接に代る仮気密を施した後試験孔11,12から夫々真
空引きを行ない到達真空度及び真空止め試験によって○
リング7とゴムパツキング3および0リング7とゴムパ
ッキング14間の気密性を試験し、0リング7がシース
1内外の気密性を保持していることを確認し、溶接時に
発生するスパッタ、ガスの侵入を完全に防止できること
を確かめる。上記のようにして気密性を確認した後アダ
プタリング5とカラー9とを密閉した締め付けバンド1
5及びゴムパッキング14を外し、この部分を点付溶接
により固定する。An annular groove 10 is formed on the inner periphery of the adapter ring 5, and two test holes, a test hole 11 communicating with the outside and a test hole 12 communicating with the cavity 8, are formed on both sides of the stepped portion 4 of the adapter ring 5. The adapter ring 5 and the rubber packing 3 are tightened with the bolts 13 with cotton pads inserted through the tightening rings 2 and 2 on both sides, and the O-ring 7 is tightened with the end face of the rigid part 4 of the adapter ring 5 and the collar 9. After that, the inside of the adapter ring 5 and the outer peripheral surface of the collar 9, which are the locations to be welded, are sealed with a highly elastic rubber packing 1.
4, and after applying a temporary airtight seal instead of welding with a tightening band 5, the test holes 11 and 12 were evacuated, and the final vacuum level and vacuum stop test were determined to be ○.
The airtightness between the ring 7 and the rubber packing 3 and the O-ring 7 and the rubber packing 14 was tested to confirm that the O-ring 7 maintains airtightness inside and outside the sheath 1, and to prevent spatter and gas from entering during welding. Make sure that it can be completely prevented. Tightening band 1 that seals adapter ring 5 and collar 9 after confirming airtightness as described above
5 and the rubber packing 14 are removed, and this part is fixed by spot welding.
この状態では○リング7は締め付けられたままでカラー
9とアダプタリング5は一体に結合されている。次に縦
付環2,2とゴムパッキング3,3を取り外し、シース
1とァダプタリング5を溶接aした後、さきに点付溶接
したカラー9とアダプタリング5とを完全に溶接bする
。このように仮気密の状態で○リング7による気密性を
確認し溶接作業を完了した後各試験孔11,12から所
定の試験気圧を加え溶接部の気密性を試験し、溶接部の
健全性を確認した上、試験孔1,1にアダプタリング5
と同質材の栓16を施し溶接cして密閉する。上記のよ
うに真空試験で気密性が確認された場合、圧力試験にも
耐え得ることは経験上確認されており、シース1内へ絶
縁ガスを圧入した場合その気密性は確保される。In this state, the ring 7 remains tightened and the collar 9 and adapter ring 5 are integrally connected. Next, the vertical rings 2, 2 and the rubber packings 3, 3 are removed, the sheath 1 and the adapter ring 5 are welded a, and then the collar 9 and the adapter ring 5, which were previously spot welded, are completely welded b. After confirming the airtightness with the ○ ring 7 in this temporary airtight state and completing the welding work, the airtightness of the welded part is tested by applying a predetermined test pressure from each test hole 11 and 12 to check the soundness of the welded part. After confirming, insert adapter ring 5 into test hole 1, 1.
A plug 16 made of the same material is applied and welded c to seal it. It has been empirically confirmed that if airtightness is confirmed in the vacuum test as described above, it can also withstand a pressure test, and when insulating gas is pressurized into the sheath 1, the airtightness is ensured.
又カラ−9とアダプタリング5は0リング7を締め付け
た気密状態で点付熔接されるので、溶接時のスパッタが
シース内へ侵入することはなくカラー9とアダプタリン
グ5は一体に結合され、0リングは締め付け状態に保た
れるので締め付け環を取り外しても○リングによる気密
性は保たれ、シースとアダプタリング及びカラーとアダ
プタリングとの溶接時にもスパッタリングの侵入は防止
され、絶縁ガスの清浄度は確保される。尚、アダプタリ
ング5とシース1との溶接a,aは左右何れか一方だけ
を、アダプタリング5とカラー9との溶接b,bと共に
工場溶接し、他の一方は現場溶接にすると作業性が良く
なる。In addition, since the collar 9 and the adapter ring 5 are spot welded in an airtight state with the O-ring 7 tightened, spatter during welding does not enter the sheath, and the collar 9 and the adapter ring 5 are integrally joined. Since the 0-ring is kept in a tightened state, even if the tightening ring is removed, the airtightness of the ○-ring is maintained, and sputtering is prevented from entering when welding the sheath and adapter ring, and the collar and adapter ring, and the insulating gas is cleaned. degree is ensured. It should be noted that welding a, a between the adapter ring 5 and the sheath 1 on either the left or right side can be welded in the factory together with welding b, b between the adapter ring 5 and the collar 9, and the other side can be welded in the field for better workability. Get better.
又本発明のようにカラーでシースを接合する方式はフラ
ンジの突き合せ接合に比べ長さ方向、横方向共に融通性
がある点ですぐれている。以上のように本発明によれば
、1個のカラーと2個のアダプタリングおよび2個の○
リングによって溶接されるから内外二重カラーのものに
比べて部品が少なく作業が簡単で安価に接続でき、内外
二重カラー方式のように内外両カラーの競合の手数およ
び内側カラーとシースとの核合作業によるカジリ等の事
故がなくなる。Furthermore, the method of joining the sheaths with a collar as in the present invention is superior to the butt joining of flanges in that it is more flexible in both the length and lateral directions. As described above, according to the present invention, one collar, two adapter rings, and two
Since the ring is welded, there are fewer parts compared to the inner and outer double collar type, and the work is easier and cheaper to connect. Unlike the inner and outer double collar method, there is no need for competition between the inner and outer collars, and the core of the inner collar and sheath. Accidents such as galling due to joint work will be eliminated.
またアダプタリングとカラーとは締め付けボルトのない
位置で点付溶接による仮接合を行なった後、ボルト、締
め付け環等を取り外し、シースとアダプタリングおよび
仮接合したカラーとアダプタリング全周面を完全に接合
するもので締め付け具が作業の邪魔にならず、障害物の
ない状態で溶接作業が行なえる利点があり、シースの反
転または転敷が行なえない現場作業において、点付溶接
により締め付け具を外すようにしたことは完全な気密性
が要求される溶接作業を容易にし、能率向上に顕著な効
果がある。In addition, the adapter ring and collar are temporarily joined by spot welding at a location where there are no tightening bolts, and then the bolts, tightening rings, etc. are removed, and the sheath and adapter ring and the entire circumferential surface of the temporarily joined collar and adapter ring are completely connected. It has the advantage that the fasteners do not get in the way of the work because the fasteners do not interfere with the work, and the welding work can be carried out without any obstructions.The fasteners can be removed by spot welding in on-site work where it is not possible to invert or overturn the sheath. This makes it easier to perform welding work that requires complete airtightness, and has a significant effect on improving efficiency.
図面は本発明実施の一例を示すもので第1図は管路気中
ケーブルの金属シース接続部の仮接合の状態を示す一部
切断正面図、第2図は同上の一部拡大図、第3図は接合
を完了した状態の接合部の拡大断面図である。
1…金属シース、3,14…ゴムパッキング、5……ア
ダプタリング、7……○リング、9……カラー、1 1
,12・・・試験孔、a,b,c・・・・・・溶接。
第1図
孫2図
第8図The drawings show an example of the implementation of the present invention, and FIG. 1 is a partially cutaway front view showing the temporarily joined state of the metal sheath connection part of an aerial pipe cable, FIG. 2 is a partially enlarged view of the same, and FIG. FIG. 3 is an enlarged sectional view of the joint portion in a state where the joint is completed. 1...Metal sheath, 3, 14...Rubber packing, 5...Adapter ring, 7...○ ring, 9...Color, 1 1
, 12... test hole, a, b, c... welding. Figure 1 Grandchild Figure 2 Figure 8
Claims (1)
ダプタリングを外嵌し、同アダプタリングの内周にシー
スとアダプタリング間に空室を形成する凹入段部を設け
てOリングを装入し、段部に接するOリングの両側にシ
ース面に達する試験孔と空室に通ずる試験孔とを穿設し
、上記のアダプタリングの空室が相対向するように外嵌
した接合シース間にカラーを外嵌し、その両端を空室内
に装入して締め付け具を使用し、段部とカラー端面でO
リングを締め付けた後、アダプタリングとシースおよび
アダプタリングとカラー間を仮密閉して前記試験孔によ
りOリングの気密性を試験して、アダプタリングとカラ
ー間の仮密閉を除去し、アダプタリングとカラーを点溶
接により固定し、締め付け具を外しシースとアダプタリ
ングおよび点溶接したカラーとアダプタリングの全周面
を完全に溶接し、試験孔により溶接の健全性を試験確認
したのち各試験孔を溶接密閉することを特徴とする管路
気中ケーブルの金属シース接続法。1. Fit an adapter ring onto the joint of the metal sheath in the air conduit cable, provide a recessed step on the inner periphery of the adapter ring to form a space between the sheath and the adapter ring, and insert the O-ring. Then, a test hole that reaches the sheath surface and a test hole that communicates with the cavity are bored on both sides of the O-ring that is in contact with the stepped part, and a test hole that reaches the sheath surface and a test hole that communicates with the cavity are formed between the externally fitted joining sheath so that the cavity of the adapter ring faces each other. Fit the collar on the outside, insert both ends into the empty chamber, use a tightening tool, and tighten the stepped part and the end of the collar.
After tightening the ring, the adapter ring and the sheath and between the adapter ring and the collar are temporarily sealed, and the airtightness of the O-ring is tested using the test hole, the temporary seal between the adapter ring and the collar is removed, and the adapter ring and the collar are sealed. Fix the collar by spot welding, remove the fasteners, completely weld the sheath and adapter ring, and the entire circumferential surface of the spot welded collar and adapter ring. After testing and confirming the soundness of the welding using test holes, each test hole is A metal sheath connection method for aerial cables characterized by welding and sealing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54145228A JPS6032422B2 (en) | 1979-11-08 | 1979-11-08 | Metal sheath connection method for aerial cables |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54145228A JPS6032422B2 (en) | 1979-11-08 | 1979-11-08 | Metal sheath connection method for aerial cables |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5668206A JPS5668206A (en) | 1981-06-08 |
JPS6032422B2 true JPS6032422B2 (en) | 1985-07-27 |
Family
ID=15380298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54145228A Expired JPS6032422B2 (en) | 1979-11-08 | 1979-11-08 | Metal sheath connection method for aerial cables |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6032422B2 (en) |
-
1979
- 1979-11-08 JP JP54145228A patent/JPS6032422B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5668206A (en) | 1981-06-08 |
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