JPH0326016B2 - - Google Patents
Info
- Publication number
- JPH0326016B2 JPH0326016B2 JP22437085A JP22437085A JPH0326016B2 JP H0326016 B2 JPH0326016 B2 JP H0326016B2 JP 22437085 A JP22437085 A JP 22437085A JP 22437085 A JP22437085 A JP 22437085A JP H0326016 B2 JPH0326016 B2 JP H0326016B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- insulating
- liquid
- radiator
- pull
- 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
- 238000001816 cooling Methods 0.000 claims description 12
- 239000012212 insulator Substances 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000005684 electric field Effects 0.000 claims description 4
- 239000011796 hollow space material Substances 0.000 claims 1
- 230000005484 gravity Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Gas Or Oil Filled Cable Accessories (AREA)
- Cable Accessories (AREA)
Description
【発明の詳細な説明】
本発明は電力ケーブル用の自然対流を利用した
気・液循環自冷形終端接続箱に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas/liquid circulation self-cooling terminal junction box for power cables that utilizes natural convection.
大容量送電ケーブル(架橋ポリエチレン絶縁ビ
ニルシースケーブルあるいは油入ケーブル等)に
対し、ケーブルの発熱による抵抗増大を抑制する
ために水等でケーブル自身を直接または間接的に
冷却する方法が採用されている。この場合、ケー
ブル本体は強制冷却により大容量化が達成される
が、ケーブル終端接続箱の大容量化が実現出来な
い限り系統全体としての大容量化は不可能であ
る。 For large-capacity power transmission cables (cross-linked polyethylene insulated vinyl sheathed cables, oil-filled cables, etc.), a method has been adopted in which the cable itself is directly or indirectly cooled with water or the like in order to suppress an increase in resistance due to heat generation in the cable. In this case, the capacity of the cable itself can be increased by forced cooling, but unless the capacity of the cable termination junction box can be increased, it is impossible to increase the capacity of the system as a whole.
このため従来においては、終端接続部分のケー
ブルの導体を大形化するか、あるいは専門の冷却
システムの導入が必要とされており、経済性およ
び保守の容易さから接続箱の頂部に放熱器を設
け、絶縁油の自然対流循環を利用して自冷形終端
接続箱を形成することが提案されている。しかし
ながら、従来このような自冷方式ではケーブル導
体から吸熱して、温度の上昇した絶縁油が放熱器
に運ばれる間に温度が下り、充分な対流循環を得
ることが出来ず、従つて冷却効果も充分とはなら
ない。すなわち、ケーブル導体の電流による発熱
はケーブル絶縁体を介して充填された絶縁油を昇
温させ、それにより絶縁油を膨張させて比重を小
さくし、それにより油を上方に移動させることに
なるが、放熱器の管内で油の放熱が生じてその比
重を増大させてしまい、油の循環駆動力が相殺さ
れ、冷却効果が失われる。従つて、従来このよう
な自冷方式を単独で用いても、ケーブルの大容量
化には充分寄与しない状態となつていた。 For this reason, in the past, it was necessary to increase the size of the cable conductor at the end connection or to install a specialized cooling system, and for reasons of economy and ease of maintenance, a heat sink was installed at the top of the connection box. It has been proposed to form a self-cooled terminal junction box using the natural convection circulation of insulating oil. However, in conventional self-cooling systems, heat is absorbed from the cable conductor, and the temperature of the insulating oil, which has risen in temperature, decreases while being carried to the radiator, making it impossible to obtain sufficient convection circulation and, therefore, reducing the cooling effect. is also not sufficient. In other words, the heat generated by the current in the cable conductor raises the temperature of the insulating oil filled through the cable insulator, which causes the insulating oil to expand and reduce its specific gravity, which causes the oil to move upward. , heat radiation from the oil occurs within the tubes of the radiator, increasing its specific gravity, canceling out the circulation driving force of the oil and causing a loss of cooling effect. Therefore, conventionally, even if such a self-cooling system was used alone, it did not sufficiently contribute to increasing the capacity of the cable.
本発明の目的は従来の絶縁油の自然対流の阻害
原因をとり除くことにより、冷却効果の優れた自
冷形終端接続箱を提供することにより、送電ケー
ブルの大容量化を達成することである。 An object of the present invention is to provide a self-cooling type terminal junction box with excellent cooling effect by eliminating the conventional causes of inhibiting the natural convection of insulating oil, thereby increasing the capacity of power transmission cables.
本発明によれば、接続箱の頂部に設けられる放
熱器への気・液体通路として、導体引出棒を利用
し、更にこの引出棒を断熱部材により囲むことに
より上記目的を達成する。 According to the present invention, the above object is achieved by using a conductor pull-out rod as a gas/liquid passage to the radiator provided at the top of the connection box, and further surrounding the pull-out rod with a heat insulating member.
以下図面に示す実施例にもとづき本発明を詳細
に説明する。 The present invention will be described in detail below based on embodiments shown in the drawings.
第1図は本発明の一実施例を示す部分断面図で
ある。第1図においては終端接続箱の構造が同心
形状であるため、その右半部のみを断面で示して
いる。なお、第2図は第1図−線における断
面図である。第1,2図において、碍管2に挿通
されたケーブル1の絶縁体上に、絶縁補強層3と
ベルマウス4からなる電界緩和部と、ケーブル1
及び電界緩和部の周上に間隙を有して、コンデン
サ5が配置されている。また、碍管2の頂部には
放熱器9が設けてあり、その内部にはOF油ある
いはシリコン油等の絶縁油7が充填されている。
絶縁油7はケーブル1とコンデンサ5の間の間隙
を通り、ケーブル1の先端に接続される中空の導
体引出棒8の中空部を通つて放熱器9に導かれ、
更に放熱器9からコンデンサ5の碍管2との間隙
を通り、矢印のごとき循環ループを構成する。 FIG. 1 is a partial sectional view showing one embodiment of the present invention. In FIG. 1, since the structure of the terminal junction box is concentric, only the right half thereof is shown in cross section. Note that FIG. 2 is a sectional view taken along the line of FIG. 1. 1 and 2, on the insulator of the cable 1 inserted through the insulator tube 2, there is an electric field relaxation part consisting of an insulation reinforcing layer 3 and a bell mouth 4, and the cable 1
A capacitor 5 is arranged on the periphery of the electric field relaxation part with a gap therebetween. Further, a radiator 9 is provided at the top of the insulator tube 2, and the inside thereof is filled with an insulating oil 7 such as OF oil or silicone oil.
The insulating oil 7 passes through the gap between the cable 1 and the capacitor 5, passes through the hollow part of the hollow conductor pull-out rod 8 connected to the tip of the cable 1, and is guided to the radiator 9.
Furthermore, it passes through the gap between the radiator 9 and the insulator tube 2 of the condenser 5, forming a circulation loop as shown by the arrow.
導体引出棒8は第2図に示すように中空であつ
て、その周囲には断熱層10が設けてある。 The conductor pull-out rod 8 is hollow as shown in FIG. 2, and a heat insulating layer 10 is provided around it.
このような構成によれば、ケーブル1の導体に
流れる電流による発熱は、ケーブル1の絶縁体を
介し、ケーブル1とコンデンサ5との間隙にある
絶縁油7に吸収されて、この温度を上昇させ膨張
させる。これにより、この部分の絶縁油の比重が
下がり、放熱器9に向かつて上昇する。その際、
棒体引出棒8は断熱層10により囲まれているか
ら、その中空部通路を流れる絶縁油から外気への
放熱は防止され、比重を下げることなく放熱器9
の頂部まで運ばれる。以後は従来通り放熱器9で
放熱されて比重の増大した絶縁油は重力に従つて
碍管2とコンデンサ5との間隙を通り下降する。 According to this configuration, heat generated by the current flowing through the conductor of the cable 1 is absorbed by the insulating oil 7 in the gap between the cable 1 and the capacitor 5 through the insulator of the cable 1, increasing the temperature. Inflate. As a result, the specific gravity of the insulating oil in this portion decreases and rises toward the radiator 9. that time,
Since the rod body pull-out rod 8 is surrounded by the heat insulating layer 10, heat radiation from the insulating oil flowing through the hollow passageway to the outside air is prevented, and the radiator 9 can be removed without lowering the specific gravity.
carried to the top of the Thereafter, as before, the insulating oil whose specific gravity has increased due to heat being radiated by the radiator 9 descends through the gap between the insulator tube 2 and the capacitor 5 according to gravity.
このように本発明によれば、自然対流による循
環駆動力を弱める要因は取り除かれ、充分な循環
を得ることが出来、従つて、充分な冷却効果を得
ることが出来る。 As described above, according to the present invention, factors that weaken the circulation driving force due to natural convection are removed, sufficient circulation can be obtained, and therefore a sufficient cooling effect can be obtained.
以上、油中終端箱について本発明を詳述した
が、本発明はSF6ガス中終端箱等の気中終端箱等
にも等しく適用出来るものであり、いずれの場合
であつても同様の冷却効果を得るものである。ま
た、上述の実施例においては、導体引出棒を中空
としてその部分を絶縁油通路としたが、通路を別
途設け、それを断熱構造とするようにすることに
よつて、同様の効果を得ることが出来る。 Although the present invention has been described above in detail with respect to an oil termination box, the present invention is equally applicable to an air termination box such as an SF 6 gas termination box, and in any case, similar cooling is required. It is effective. Furthermore, in the above embodiment, the conductor pull-out rod is hollow and that part is used as an insulating oil passage, but the same effect can be obtained by separately providing a passage and making it a heat-insulating structure. I can do it.
第1図は本発明の一実施例の部分断面図、第2
図は第1図−線における断面図である。
1……ケーブル、2……碍管、3……絶縁補強
層、4……ベルマウス、5……コンデンサ、7…
…絶縁油、8……導体引出棒、9……放熱器、1
0……断熱層。
FIG. 1 is a partial sectional view of one embodiment of the present invention, and FIG.
The figure is a sectional view taken along the line of FIG. 1... Cable, 2... Insulator tube, 3... Insulation reinforcing layer, 4... Bell mouth, 5... Capacitor, 7...
…Insulating oil, 8…Conductor pull-out rod, 9…Radiator, 1
0...Insulating layer.
Claims (1)
された電界緩和部と、ケーブル及び上記電界緩和
部との間に間隙を有するコンデンサまたは絶縁筒
を配置し絶縁気・液体を充填した碍管と、上記絶
縁気・液体の循環可能な放熱器とからなる終端箱
において、上記コンデンサまたは絶縁筒内の絶縁
気・液体と上記放熱器の頂部を連絡させる気・液
体通路として、ケーブル導体と接続した中空引出
棒を利用し、上記引出棒の周囲に断熱層を設けた
ことを特徴とする電力ケーブル用自冷形終端接続
箱。1. An electric field relaxation section placed on a cable insulator inserted into the insulator tube, and an insulator tube filled with an insulating gas or liquid, with a capacitor or insulating tube arranged with a gap between the cable and the electric field relaxation section; In a terminal box consisting of the above-mentioned heat radiator capable of circulating insulating gas/liquid, a hollow space connected to the cable conductor is used as a gas/liquid passage connecting the above-mentioned capacitor or the insulating gas/liquid in the insulating cylinder to the top of the above-mentioned radiator. A self-cooling type terminal junction box for power cables, which uses a pull-out rod and is characterized in that a heat insulating layer is provided around the pull-out rod.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60224370A JPS6285616A (en) | 1985-10-08 | 1985-10-08 | Self-cooling type terminal joint box of power cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60224370A JPS6285616A (en) | 1985-10-08 | 1985-10-08 | Self-cooling type terminal joint box of power cable |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6285616A JPS6285616A (en) | 1987-04-20 |
JPH0326016B2 true JPH0326016B2 (en) | 1991-04-09 |
Family
ID=16812689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60224370A Granted JPS6285616A (en) | 1985-10-08 | 1985-10-08 | Self-cooling type terminal joint box of power cable |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6285616A (en) |
-
1985
- 1985-10-08 JP JP60224370A patent/JPS6285616A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6285616A (en) | 1987-04-20 |
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