JPS6249687B2 - - Google Patents
Info
- Publication number
- JPS6249687B2 JPS6249687B2 JP54103906A JP10390679A JPS6249687B2 JP S6249687 B2 JPS6249687 B2 JP S6249687B2 JP 54103906 A JP54103906 A JP 54103906A JP 10390679 A JP10390679 A JP 10390679A JP S6249687 B2 JPS6249687 B2 JP S6249687B2
- Authority
- JP
- Japan
- Prior art keywords
- insulating paper
- cable
- insulating
- oil
- drying
- 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
- Manufacturing Of Electric Cables (AREA)
Description
【発明の詳細な説明】
本発明はOFケーブルの製造方法に関し、特に
高品質の紙電力ケーブルを低コストで製造するこ
とを目的とするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing OF cables, and in particular is aimed at manufacturing high quality paper power cables at low cost.
従来のOFケーブルは、紙巻き工程後のケーブ
ルコアを乾燥缶内に入れ、加熱真空引きしてまず
絶縁紙層内部の水分を0.1％以下に下げた後、脱
湿、脱ガスした絶縁油を含浸させていた。 In conventional OF cables, the cable core after the paper wrapping process is placed in a drying can, heated and vacuumed to reduce the moisture inside the insulating paper layer to below 0.1%, and then impregnated with dehumidified and degassed insulating oil. I was letting it happen.
しかしこの方法は乾燥時間が長く、したがつて
ケーブルの製造日数も長くなるという欠点があ
る。これを改良するため、脱湿、脱ガスした高温
の絶縁油をケーブル・コアの油通路に圧入し、絶
縁体の半径方向に流して循環させることにより絶
縁紙層を乾燥させる方法、あるいはN2ガス等の
乾燥不活性ガスを上記と同じように循環させるこ
とによつて乾燥させる方法が提案された。しかし
ながら前者の絶縁油循環の場合は、特に初期段階
の水分が多いと絶縁油の脱水処理に大きな能力を
必要とするため装置が大型化し経済的でないとい
う不利がある。また後者の不活性ガス循環の場合
は、ガスの温度と湿度にもよるが、乾燥の最終段
階で時間がかかり、かつ乾燥の最終到達点が不十
分で乾燥工程後も絶縁油含浸工程前に絶縁体の脱
ガスのために真空引き等をしなければならない。 However, this method has the disadvantage that the drying time is long and therefore the production time of the cable is also increased. To improve this, there is a method of drying the insulating paper layer by pressurizing dehumidified and degassed high-temperature insulating oil into the oil passage of the cable core and circulating it in the radial direction of the insulator, or by drying the insulating paper layer . A method of drying by circulating a dry inert gas such as gas in the same manner as above has been proposed. However, in the case of the former type of insulating oil circulation, especially if there is a lot of moisture in the initial stage, a large capacity is required to dehydrate the insulating oil, which makes the equipment large and uneconomical. In addition, in the case of the latter inert gas circulation, depending on the temperature and humidity of the gas, it takes time in the final stage of drying, and the final stage of drying is insufficient, so that even after the drying process, before the insulating oil impregnation process, it takes a long time. A vacuum must be drawn to degas the insulator.
本発明は前記のような不利、難点を解消できる
方法を提供するものである。本発明の方法はケー
ブル導体上に絶縁紙を巻きつけた後、高温の乾燥
不活性ガスをケーブルの導体内油通路に圧入し、
該通路から半径方向に絶縁紙層を通過させて循環
することにより絶縁紙層を乾燥させ、絶縁紙の水
分が95％程度除去されてほとんど乾燥状態になつ
たとき、前記循環を脱湿、脱ガスした高温の絶縁
油に切替え、最終乾燥を行うことを特徴とするも
のである。 The present invention provides a method capable of overcoming the above-mentioned disadvantages and difficulties. The method of the present invention involves wrapping insulating paper over a cable conductor, and then pressurizing a hot dry inert gas into the oil passage within the cable conductor.
The insulating paper layer is dried by circulating it through the insulating paper layer in the radial direction from the passage, and when about 95% of the moisture in the insulating paper has been removed and the paper is almost dry, the circulation is stopped by dehumidifying and dehumidifying. It is characterized by switching to gaseous high-temperature insulating oil and performing final drying.
以下本発明の好ましい実施態様について述べ
る。 Preferred embodiments of the present invention will be described below.
まずケーブル導体上に絶縁紙を巻きつける工程
後未乾燥状態にある絶縁紙層を有するケーブルコ
アの外周に長さ方向に連続する密閉空間を設け
る。このための一方法としてたとえばケーブルコ
ア上にアルミ被等の外部被覆を施しコアとの間を
密閉空間とするか、あるいはケーブルコアを真空
乾燥缶中に置くことにより外周に密閉空間を設け
るなどのことが行われる。 First, a closed space continuous in the length direction is provided around the outer periphery of a cable core having an insulating paper layer that is not dried after the process of wrapping insulating paper around a cable conductor. One way to do this is to create an airtight space between the cable core and the core by applying an external covering such as aluminum to the cable core, or to create an airtight space around the outer periphery by placing the cable core in a vacuum drying can. things are done.
図面は本発明の一実施態様としてケーブルコア
上に外部被覆としてアルミ被を施したOFケーブ
ルの乾燥含浸工程を示すもので、第１図の１は
OFケーブル全体を模型的に示したもので、２は
導体、３は油通路、４は未乾燥絶縁紙層、５はア
ルミ被、６は密閉空間である。ケーブル１の両端
には密閉を確実にするためふた７が設けられてい
る。８は不活性ガスの脱湿加熱加圧装置である。
不活性ガスとしては高純度N2、SF6などが用いら
れタンク９に貯蔵される。８によつて脱湿された
乾燥不活性ガスは圧力制御弁１０で所定圧にされ
切換弁１１を通つてケーブル内の油通路３に送入
され、絶縁紙層４を半径方向に流れて密閉空間６
に流出し弁１２を経て８にもどり循環する、この
場合弁１３は閉じられている。不活性ガスの循環
によつて絶縁紙層４が脱湿され、水分が95％程度
除去されて、ほとんど乾燥状態となつた時点で弁
１２を閉じ、弁１３を開くと共に切換弁１１で絶
縁油の脱湿、脱ガス加熱加圧装置１４に接続し、
絶縁油を不活性ガスと同じように循環させる。こ
れによつて短時間に絶縁紙層の完全な乾燥と含浸
が行われる。 The drawings show the drying and impregnating process of an OF cable in which aluminum is coated as an outer coating on the cable core as an embodiment of the present invention.
This is a schematic diagram of the entire OF cable, where 2 is a conductor, 3 is an oil passage, 4 is an undried insulating paper layer, 5 is an aluminum sheath, and 6 is a sealed space. A lid 7 is provided at both ends of the cable 1 to ensure sealing. 8 is an inert gas dehumidification heating and pressurizing device.
High purity N2 , SF6 , etc. are used as the inert gas and are stored in the tank 9. The dry inert gas dehumidified by step 8 is brought to a predetermined pressure by a pressure control valve 10, is sent to an oil passage 3 in the cable through a switching valve 11, flows radially through an insulating paper layer 4, and is sealed. space 6
8 and circulates back to 8 via valve 12, in which case valve 13 is closed. The insulating paper layer 4 is dehumidified by the circulation of the inert gas, and when approximately 95% of the moisture is removed and the insulating paper layer 4 is almost dry, the valve 12 is closed, the valve 13 is opened, and the insulating oil is turned off using the switching valve 11. connected to the dehumidification, degassing heating and pressurizing device 14,
Circulate insulating oil in the same way as inert gas. This results in complete drying and impregnation of the insulating paper layer in a short time.
この場合循環ガスと循環油との水分除去につい
てみると、100℃、１のガス中の飽和水蒸気量
は0.6ｇ／、絶縁油中の飽和水分量は1.1ｇ／
であり、100℃における粘度μはガス0.022cp、絶
縁油1.6cpである。 In this case, regarding the removal of water from the circulating gas and circulating oil, at 100°C, the amount of saturated water vapor in the gas is 0.6 g/1, and the amount of saturated water vapor in the insulating oil is 1.1 g/
The viscosity μ at 100°C is 0.022 cp for gas and 1.6 cp for insulating oil.
流体が持ち去る水分量の比は圧力が等しい場合
理論的に
空気／油＝０．６×１／０．０２２／１．１×１／１
．６＝40となり、空気がは
るかに多いことがわかる。また100℃における実
験では90％の水分を除去するのに、圧力１Kg／cm2
換算で油は160時間、ガスは８時間を要し、その
比が160／８＝20になることが認められる。 Theoretically, the ratio of the amount of water carried away by the fluid when the pressures are equal: air/oil = 0.6 x 1/0.022/1.1 x 1/1
．． 6 = 40, which shows that there is much more air. In addition, in an experiment at 100℃, it took a pressure of 1Kg/cm 2 to remove 90% of water.
In terms of conversion, it is recognized that oil requires 160 hours and gas requires 8 hours, and the ratio is 160/8 = 20.
本発明による方法は初期段階で乾燥ガスを循環
させ水分が減少してから油の循環に切換えるため
油の処理装置が小型のものでよく、処理装置とし
てはゼオライトを充填した脱湿塔を使用でき、ゼ
オライトの再生は高温N2ガスの循環によつて行
えるが、水分が減少してから油の循環をする場合
は再生インターパルを長くとることができる。 The method according to the present invention circulates dry gas in the initial stage and switches to oil circulation after the water content is reduced, so the oil treatment equipment only needs to be small, and a dehumidification tower filled with zeolite can be used as the treatment equipment. , regeneration of zeolite can be performed by circulating high temperature N 2 gas, but if oil is circulated after the water content has been reduced, the regeneration interval can be made longer.
本発明の方法では不活性ガスにより絶縁紙層が
95％程度になるまで乾燥するが、従来法にしたが
つて最終段階までガスを循環させる場合にはガス
の乾燥度を十分高める必要があり、ガスの脱湿に
圧縮冷却等の処理が必要になる。 In the method of the present invention, the insulating paper layer is
It dries until it is about 95% dry, but if the gas is circulated to the final stage using conventional methods, it is necessary to sufficiently increase the degree of dryness of the gas, and treatments such as compression cooling are required to dehumidify the gas. Become.
第１図は本発明方法を実施する装置としてアル
ミ被ケーブルの場合の乾燥含浸工程を示す説明図
である。
１……OFケーブル、２……導体、３……油通
路、４……絶縁紙層、５……アルミ被、６……密
閉空間、７……ふた、８……ガス脱湿加熱加圧装
置、９……タンク、１０……圧力制御弁、１１…
…切換弁、１４……絶縁油脱湿、脱ガス加熱加圧
装置。
FIG. 1 is an explanatory view showing the drying and impregnating process in the case of an aluminum sheathed cable as an apparatus for carrying out the method of the present invention. 1...OF cable, 2...Conductor, 3...Oil passage, 4...Insulating paper layer, 5...Aluminum covering, 6...Sealed space, 7...Lid, 8...Gas dehumidification heating pressurization Device, 9...Tank, 10...Pressure control valve, 11...
...Switching valve, 14...Insulating oil dehumidification, degassing heating and pressurizing device.
Claims (1)
ブルの導体内油通路に圧入し、絶縁紙層の半径方
向に流して循環させることによりケーブル絶縁紙
の乾燥を行い、絶縁紙の水分が95％程度除去され
て殆ど乾燥状態になつたとき、循環媒体を脱湿、
脱ガスした高温の絶縁油に切替え、引き続き絶縁
紙層の半径方向に流して循環させることにより、
ケーブル絶縁紙の乾燥を行うことを特徴とする電
力ケーブルの製造方法。1 After the paper wrapping process, the cable insulating paper is dried by injecting high temperature dry inert gas into the cable conductor oil passage and circulating it in the radial direction of the insulating paper layer, until the moisture content of the insulating paper is 95%. When the circulating medium is almost dry, dehumidify it.
By switching to degassed high-temperature insulating oil and continuing to circulate it in the radial direction of the insulating paper layer,
A method for manufacturing a power cable, comprising drying cable insulating paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10390679A JPS5628415A (en) | 1979-08-15 | 1979-08-15 | Method of manufacturing electric power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10390679A JPS5628415A (en) | 1979-08-15 | 1979-08-15 | Method of manufacturing electric power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5628415A JPS5628415A (en) | 1981-03-20 |
| JPS6249687B2 true JPS6249687B2 (en) | 1987-10-21 |
Family
ID=14366461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10390679A Granted JPS5628415A (en) | 1979-08-15 | 1979-08-15 | Method of manufacturing electric power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5628415A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63134194U (en) * | 1987-02-24 | 1988-09-02 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4839936A (en) * | 1971-09-23 | 1973-06-12 |
-
1979
- 1979-08-15 JP JP10390679A patent/JPS5628415A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63134194U (en) * | 1987-02-24 | 1988-09-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5628415A (en) | 1981-03-20 |
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