JPH0125288B2 - - Google Patents
Info
- Publication number
- JPH0125288B2 JPH0125288B2 JP14994680A JP14994680A JPH0125288B2 JP H0125288 B2 JPH0125288 B2 JP H0125288B2 JP 14994680 A JP14994680 A JP 14994680A JP 14994680 A JP14994680 A JP 14994680A JP H0125288 B2 JPH0125288 B2 JP H0125288B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- oil passage
- cable
- end side
- external
- 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
- 239000012212 insulator Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 80
- 239000004020 conductor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- PZZOEXPDTYIBPI-UHFFFAOYSA-N 2-[[2-(4-hydroxyphenyl)ethylamino]methyl]-3,4-dihydro-2H-naphthalen-1-one Chemical compound C1=CC(O)=CC=C1CCNCC1C(=O)C2=CC=CC=C2CC1 PZZOEXPDTYIBPI-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
- Gas Or Oil Filled Cable Accessories (AREA)
Description
【発明の詳細な説明】
本発明は、単心OFケーブル内の絶縁油を、導
体の内部油通路から、絶縁体の中を半径方向に流
して冷却する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cooling insulating oil in a single-core OF cable by flowing it radially through the insulation from internal oil passages in the conductor.
従来技術を、「第１図」について述べる。 The prior art will be described with reference to "Fig. 1".
１０はケーブルの全体、１２はその導体、１４
は内部油通路、１６は絶縁体、１８は外部油通
路。冷却された油はポンプ２０によつて内部油通
路１４内に送り込まれ、矢印２１のように終端側
１０１に向つて流れ、その間に導体１２を冷却す
る。それと同時に、油は矢印２２のように、絶縁
体１６内を半径方向に流れて、外部油通路１８に
出る。この絶縁体１６内の油の流れによつて、絶
縁体１６の見掛の熱抵抗が小さくなり、また絶縁
体１６内に発生する誘導体損失による熱が持ち去
られる。 10 is the entire cable, 12 is its conductor, 14
1 is an internal oil passage, 16 is an insulator, and 18 is an external oil passage. The cooled oil is pumped into the internal oil passage 14 by the pump 20 and flows towards the end side 101 as indicated by the arrow 21, cooling the conductor 12 in the meantime. At the same time, oil flows radially within the insulator 16 and out of the external oil passage 18, as indicated by arrow 22. This flow of oil within the insulator 16 reduces the apparent thermal resistance of the insulator 16, and also carries away heat due to dielectric loss occurring within the insulator 16.
外部油通路１８に出た油は、矢印２３のように
流れ、始端側１０２からケーブル１０外に取り出
され、冷却器２４を通り再びケーブル１０の内部
油通路１４内に送り込まれる。 The oil discharged to the external oil passage 18 flows as indicated by an arrow 23, is taken out of the cable 10 from the starting end side 102, passes through the cooler 24, and is sent into the internal oil passage 14 of the cable 10 again.
従来技術の問題点を述べる。 Problems with the conventional technology will be described.
「第２図」のＡは、内部油通路１４内の油の温
度分布、Ｂは外部油通路１８内の油の温度分布を
示す。 A in FIG. 2 shows the temperature distribution of oil in the internal oil passage 14, and B shows the temperature distribution of oil in the external oil passage 18.
内部油通路１４内の任意の位置に、極めて接近
した２点ａ，ｂをとる（第１図）。また、ａ，ｂ
の外側に当たるｃ，ｄを外部油通路１８内にもと
り、これらの油の温度について考えてみる。 Two points a and b, which are very close to each other, are placed at arbitrary positions within the internal oil passage 14 (Fig. 1). Also, a, b
Let us consider the temperature of these oils by taking c and d, which are on the outside, inside the external oil passage 18.
ａからｂに行く間に、導体１２の熱を吸収して
油の温度は上がる。その温度の上がつた油が、絶
縁体１６内を通つて外部油通路１８のｄに出、ｃ
に引き返す。 While going from a to b, the oil absorbs heat from the conductor 12 and the temperature of the oil rises. The heated oil passes through the insulator 16 and exits to the external oil passage 18 d, and c
turn back to
一方ａから絶縁体１６を通つて直接ｃに出る油
もあるが、こちらの方が、ｂ，ｄを通つてｃに戻
る油よりも温度が低い。そのため、ｄからｃに戻
る油は冷されて温度が下がる。（反対にａからｃ
に出た油は、ｄから戻つて来る油によつて温めら
れ、そのために、外部油通路１８内の油温の方が
内部油通路１４内より高い）。 On the other hand, some oil exits directly from a to c through the insulator 16, but this oil has a lower temperature than the oil that returns to c through b and d. Therefore, the oil returning from d to c is cooled and its temperature drops. (on the contrary, from a to c
The oil coming out from d is warmed by the oil returning from d, so the oil temperature in the external oil passage 18 is higher than in the internal oil passage 14).
以上のことがケーブル１０の全長にわたつて行
なわれる。その結果、T0の温度で内部油通路１
４内に入つた油は、終端側１０１ではT4まで上
昇するが、始端側１０２に戻るときは、T1にま
で下がる。すなわち、内部油通路１４に入つた油
が終端側１０１まで行く間にT4―T0に相当する
熱をケーブル１０から奪うが、外部油通路１８内
を始端側１０２に戻るとき、T4―T1に相当する
熱をケーブル１０内および外部に放出し、結局
T1―T0に相当する熱だけしか、ケーブル１０外
に持ち去らないことになる。 The above is performed over the entire length of the cable 10. As a result, at a temperature of T 0 the internal oil passage 1
4 rises to T 4 on the terminal end side 101, but drops to T 1 when returning to the starting end side 102. That is, while the oil entering the internal oil passage 14 travels to the terminal end side 101, heat corresponding to T 4 -T 0 is removed from the cable 10, but when the oil returns inside the external oil passage 18 to the starting end side 102, T 4 -T 0 is removed from the cable 10. Heat equivalent to T 1 is released into the cable 10 and outside, and eventually
Only the heat corresponding to T 1 - T 0 is carried away outside the cable 10.
そこで、以上の問題の解決策として、下記の技
術が提案されている。それを第３図について説明
すると、次のとおりである。 Therefore, the following technology has been proposed as a solution to the above problem. This can be explained with reference to FIG. 3 as follows.
外部油通路１８内の油を、上記とは反対に、終
端側１０１に向つて矢印２５のように流す。終端
側１０１まで行つた油は、たとえばリターンパイ
プ２６などによつて始端側１０２に戻され、循環
する。 The oil in the external oil passage 18 is caused to flow toward the terminal end side 101 in the direction of the arrow 25, contrary to the above. The oil that has reached the terminal end side 101 is returned to the starting end side 102 by, for example, the return pipe 26, and is circulated.
このようにした場合の内部油通路１４内の温度
の分布を、「第２図」のＣに、外部油通路１８内
のものをＤに示した。 The temperature distribution in the internal oil passage 14 in this case is shown in C of FIG. 2, and the temperature distribution in the external oil passage 18 is shown in D.
上記同様に、内部油通路１４および外部油通路
１８内の極めて接近した任意の点ｅ，ｆ，ｇ，ｈ
における油の温度について考える。 Similarly to the above, arbitrary points e, f, g, h in the internal oil passage 14 and the external oil passage 18 that are very close to each other
Consider the temperature of the oil at .
ｅからｆに行く間に、導体１２の熱を吸収して
油の温度が上がる。ｆから絶縁体１６内を通つて
外部油通路１８のｈに出た油は、先に（終端側１
０１に）進む。したがつて、ｅから直接ｇに出る
油により冷やされることがない（またｅからｇに
出る油を温めることもない。そのため従来とは反
対に外部油通路１８内の油温の方が、内部油通路
１４内より低い）。 While going from e to f, the temperature of the oil increases by absorbing the heat of the conductor 12. The oil flowing from f through the insulator 16 to h of the external oil passage 18 first (end side 1
Go to 01). Therefore, the oil in the external oil passage 18 is not cooled by the oil that directly exits from e (and the oil that exits from e is not heated). (lower than inside the oil passage 14).
外部油通路１８内の油は、温度を次第に上げな
がら出口（終端側１０１）に向つて進み、T2に
なつてケーブル１０から出る。したがつてT2―
T0に相当する熱がケーブル１０から持ち去られ、
油による冷却効果は、第１図の場合より大きくな
る。 The oil in the external oil passage 18 advances toward the outlet (terminus side 101) while gradually increasing its temperature, becomes T2 , and exits the cable 10. Therefore T 2 -
Heat corresponding to T 0 is carried away from the cable 10,
The cooling effect of oil is greater than in the case of FIG.
しかし、第３図の場合は、ケーブルの始端側で
外部油通路１８内の油圧は最大になる。 However, in the case of FIG. 3, the oil pressure in the external oil passage 18 is at its maximum at the starting end of the cable.
そのため、内部油通路１４に送込む油の圧を上
げると、ケーブルシースに過大な圧がかかる危険
がある。 Therefore, if the pressure of the oil sent into the internal oil passage 14 is increased, there is a risk that excessive pressure will be applied to the cable sheath.
本発明は、以上述べた種々の問題に解決を与え
るものである。 The present invention provides solutions to the various problems mentioned above.
実施例（第４図）
外部油通路１８の所々に油止め３２を設ける。
なお、第４図においては、ケーブル線路を３等分
する２箇所に油止め３２を設けたように、模型的
に示しているが、油止め３２の数は２個に限るも
のではない。Embodiment (FIG. 4) Oil stoppers 32 are provided at various locations in the external oil passage 18.
Although FIG. 4 schematically shows oil stops 32 provided at two locations dividing the cable line into three equal parts, the number of oil stops 32 is not limited to two.
油止め３２の始端側寄りの所で、外部油通路１
８とリターンパイプ２６とをパイプ３４でつな
ぐ。 At a location near the starting end of the oil stopper 32, the external oil passage 1
8 and the return pipe 26 are connected by a pipe 34.
以上のようにすると、内部油通路１４から外部
油通路１８に出た油は、上記第３図の場合同様に
終端側に向つて流れるが、油止め３２の手前でリ
ターンパイプ２６に出て、ケーブル始端側に戻
る。 In the above manner, the oil flowing from the internal oil passage 14 to the external oil passage 18 flows toward the terminal end as in the case of FIG. Return to the starting end of the cable.
発明の効果
(1) 内部油通路１４に送込む油の圧を上げること
ができる。Effects of the invention (1) The pressure of oil sent to the internal oil passage 14 can be increased.
すなわち、外部油通路１８が複数箇所におい
てリターンパイプ２６と通じているので、ケー
ブルシース、特に始端側のケーブルシースに過
大な圧力がかかることがなくなるからである。 That is, since the external oil passage 18 communicates with the return pipe 26 at a plurality of locations, excessive pressure is not applied to the cable sheath, especially the cable sheath on the starting end side.
(2) 内部油通路１４の油圧を上げることにより、
冷却区間を長くすることができる。(2) By increasing the oil pressure in the internal oil passage 14,
The cooling section can be made longer.
(3) また油の流量を多くすることができる。(3) Also, the flow rate of oil can be increased.
第１図と第３図は異なる従来技術の説明図、第
２図は第１図および第３図の場合の内部油通路１
４および外部油通路１８内の油の温度分布図、第
４図は本発明の実施例の説明図。
１０…ケーブル、１０１…終端側、１０２…始
端側、１２…導体、１４…内部油通路、１６…絶
縁体、１８…外部油通路、２６…リターンパイ
プ。
Figures 1 and 3 are explanatory diagrams of different conventional techniques, and Figure 2 is the internal oil passage 1 in the case of Figures 1 and 3.
4 and an oil temperature distribution diagram in the external oil passage 18, FIG. 4 is an explanatory diagram of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... Cable, 101... Terminal end side, 102... Start end side, 12... Conductor, 14... Internal oil passage, 16... Insulator, 18... External oil passage, 26... Return pipe.
Claims (1)
絶縁油が送り込まれ、その油が終端側１０１に向
つて流れると共に、絶縁体１６内を半径方向に流
れて外部油通路１８に出、外部油通路１８に出た
油が終端側１０１に向つて流れ、終端側１０１に
おいてケーブル１０の外に取り出され、リターン
パイプ２６によつて終端側１０２に戻され、冷却
されて再びケーブル１０の内部油通路１４内に送
り込まれるOFケーブルの冷却方法において、外
部油通路１８の複数箇所に油止め３２を設け、そ
の始端側寄りの所で、外部油通路１８をリターン
パイプ２６につなぐことを特徴とする、OFケー
ブルの冷却方法。1 Cooled insulating oil is fed into the internal oil passage 14 of the cable 10, and the oil flows toward the terminal end side 101, flows in the radial direction within the insulator 16, exits to the external oil passage 18, and flows into the external oil passage 18. 18 flows toward the terminal end side 101, is taken out of the cable 10 at the terminal end side 101, is returned to the terminal end side 102 by the return pipe 26, is cooled, and returns to the internal oil passage 14 of the cable 10. The method for cooling OF cables sent into the OF cable is characterized in that oil stoppers 32 are provided at a plurality of locations in the external oil passage 18, and the external oil passage 18 is connected to the return pipe 26 at a location near the starting end thereof. Cable cooling methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14994680A JPS5774909A (en) | 1980-10-24 | 1980-10-24 | Method of cooling of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14994680A JPS5774909A (en) | 1980-10-24 | 1980-10-24 | Method of cooling of cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5774909A JPS5774909A (en) | 1982-05-11 |
| JPH0125288B2 true JPH0125288B2 (en) | 1989-05-17 |
Family
ID=15486027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14994680A Granted JPS5774909A (en) | 1980-10-24 | 1980-10-24 | Method of cooling of cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5774909A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5592507A (en) * | 1979-01-06 | 1980-07-14 | Fujikura Ltd | Method of cooling power cable |
-
1980
- 1980-10-24 JP JP14994680A patent/JPS5774909A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5592507A (en) * | 1979-01-06 | 1980-07-14 | Fujikura Ltd | Method of cooling power cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5774909A (en) | 1982-05-11 |
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