JPS5827448Y2 - Crosslinking and cooling equipment for rubber and plastic insulated cables - Google Patents
Crosslinking and cooling equipment for rubber and plastic insulated cablesInfo
- Publication number
- JPS5827448Y2 JPS5827448Y2 JP1980041703U JP4170380U JPS5827448Y2 JP S5827448 Y2 JPS5827448 Y2 JP S5827448Y2 JP 1980041703 U JP1980041703 U JP 1980041703U JP 4170380 U JP4170380 U JP 4170380U JP S5827448 Y2 JPS5827448 Y2 JP S5827448Y2
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- gas
- heating
- section
- gas injection
- 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
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
Description
【考案の詳細な説明】
本考案はゴム、プラスチック絶縁ケーブルの架橋冷却装
置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a cross-linking cooling device for rubber and plastic insulated cables.
従来、ゴム、プラスチック絶縁ケーブルを架橋冷却する
装置には、押出機に連結するカテナリー形又は垂直形の
架橋管下部に冷却水を収容し、その上部に過熱水蒸気を
充満させたものが使われているが、このような装置では
ゴム、プラスチック絶縁層内に水蒸気が入ってミクロボ
イドを形成することがあり、６０Ｋｖ以上の高電圧ケー
ブルになると電気特性に悪影響をおよぼす欠点がある。Conventionally, equipment for cross-linking and cooling rubber and plastic insulated cables uses a catenary-type or vertical cross-linking tube connected to an extruder that stores cooling water in the lower part and fills the upper part with superheated steam. However, in such devices, water vapor may enter the rubber or plastic insulating layer and form microvoids, which has the disadvantage of adversely affecting the electrical characteristics of high-voltage cables of 60 Kv or higher.
このため、最近加熱媒体としてＮ２ガス等のガスを用い
る架橋冷却装置が開発され使用されるようになってきた
が、このような装置においても、冷却媒体である冷却水
面から発生する水蒸気が絶縁層内に侵入し前記と同様な
問題が生じるおそれがあった。For this reason, bridge cooling devices that use a gas such as N2 gas as a heating medium have recently been developed and used, but even in such devices, water vapor generated from the surface of the cooling water, which is the cooling medium, There was a risk that the particles would get inside and cause the same problem as above.
またガス系の加熱媒体の加熱用に赤外線ヒータを用いた
場合には、これが蒸気により損傷したり、輻射熱を奪わ
れ輻射効率を低下させる問題があった。Furthermore, when an infrared heater is used to heat a gas-based heating medium, there are problems in that the heater is damaged by steam or that radiant heat is taken away, reducing radiation efficiency.
この場合、冷却媒体としてガスを使用すれば上記の問題
点は一応解決するが、今度は加熱媒体と冷却媒体とが容
易に混合するため、加熱媒体の温度が低下すると共に、
冷却媒体の温度が上昇し、ケーブルの架橋、冷却効率を
低下させることになり、これら両媒体の混合防止のため
、固形バッキングを用いることも考えられるが、架橋す
べきケーブルの外径が異なるたびにバッキングを交換し
なければならず、これにかなりの手間を要するほか、熱
と摩耗に強い軟質のバッキングが容易に得られず両媒体
が混合するのを長時間にわたって防止することが困難で
゛あった。In this case, using gas as the cooling medium would solve the above problem, but since the heating medium and cooling medium mix easily, the temperature of the heating medium decreases and
The temperature of the cooling medium increases, which reduces cable crosslinking and cooling efficiency.In order to prevent these two media from mixing, it is possible to use a solid backing. The backing must be replaced every time, which requires considerable effort, and it is difficult to obtain a soft backing that is resistant to heat and abrasion, making it difficult to prevent the two media from mixing over a long period of time. there were.
本考案は上記の種々の問題点を解消するためになされた
もので、以下図面を参照しながらその構成を詳細に説明
する。The present invention was devised to solve the various problems mentioned above, and its configuration will be explained in detail below with reference to the drawings.
第１図において、１は押出機のクロスヘッド、２はクロ
スヘッド１の下端に連結された垂直型の架橋管、３は架
橋管内上部にＮ２ガス等のガス系の加熱媒体を加圧下で
収容し、例えば赤外線ヒータ４により加熱するようにし
た加熱部、５は架橋管内下部に冷却水、冷却ガス（第１
図は冷却水の場合を示す）の冷却媒体を加圧下で収容し
、下端にエンドシール部６を有した冷却部であり、これ
らは上方から下方に向け、クロスヘッド１、加熱部３、
冷却部５の順に垂直に連設される。In Figure 1, 1 is the crosshead of the extruder, 2 is a vertical cross-linked pipe connected to the lower end of the cross-head 1, and 3 is a gas-based heating medium such as N2 gas that is housed under pressure in the upper part of the cross-linked pipe. For example, a heating section 5 is heated by an infrared heater 4, and a cooling water and a cooling gas (first
The figure shows the case of cooling water).This is a cooling section that accommodates a cooling medium under pressure and has an end seal section 6 at the lower end.
The cooling units 5 are vertically connected in this order.
なお、加熱部３と冷却部５は上方より下方にカテナリー
状又は傾斜直線状に連結してもよい。In addition, the heating part 3 and the cooling part 5 may be connected in a catenary shape or in an inclined linear shape from the top to the bottom.
７は加熱部３と冷却部５との境界部付近に設けたガス噴
射シール部である。Reference numeral 7 denotes a gas injection seal section provided near the boundary between the heating section 3 and the cooling section 5.
ガス噴射シール部７は冷却媒体がガスの場合には通常加
熱部３と冷却部５との境界部に設けられる。When the cooling medium is gas, the gas injection seal section 7 is usually provided at the boundary between the heating section 3 and the cooling section 5.
ガス噴射シール部は第２図及び第３図に示すように、２
個の環状バッキング８を介して加熱部３と冷却部５の境
界部付近における架橋管２に取付けられた環状部材９と
、該部材内部に形成された弓形状空隙室１０と、これに
連通され環状部材９の内周面に設けられた複数個のガス
噴射口１１と、該空隙室１０に図示しないガス供給源か
らＮ２ガス、乾燥空気等のガスを加圧供給するために環
状部材９に接続されたガス注入パイプ１２と、ガス噴射
口１１に対向する環状部材９の内周面に一体に形成され
、ガス噴射口１１から架橋管２内を横切って噴射された
ガス流を冷却部５側に向ける下方傾射面１３ａを有する
弓形状の突起片１３と、冷却部５上部に設けた噴射ガス
の出口１４とより構成される。The gas injection seal part is 2 as shown in Figures 2 and 3.
An annular member 9 attached to the bridge pipe 2 near the boundary between the heating section 3 and the cooling section 5 via an annular backing 8 communicates with the arcuate cavity 10 formed inside the member. A plurality of gas injection ports 11 provided on the inner circumferential surface of the annular member 9 and a plurality of gas injection ports 11 provided in the annular member 9 for supplying gas such as N2 gas or dry air under pressure to the cavity chamber 10 from a gas supply source (not shown). The gas injection pipe 12 connected thereto is integrally formed on the inner peripheral surface of the annular member 9 facing the gas injection port 11, and the gas flow injected from the gas injection port 11 across the inside of the bridge pipe 2 is transferred to the cooling unit 5. It is composed of an arch-shaped projection piece 13 having a downwardly inclined surface 13a facing toward the side, and an outlet 14 for the injection gas provided at the upper part of the cooling part 5.
なお、突起片１３に上方傾対面を設け、加熱部下部に噴
射ガスの出口１４を設けて噴射ガス流を加熱部側に向け
るようにしたり、該突起片１３に上下両傾斜面を設けて
噴射ガスを加熱部側と冷却部側双方に分流するようにし
てもよい。Note that the projecting piece 13 may be provided with an upwardly inclined surface, and the injection gas outlet 14 may be provided at the bottom of the heating section to direct the jet gas flow toward the heating section, or the projecting section 13 may be provided with both upper and lower inclined surfaces for injection. The gas may be divided into both the heating section side and the cooling section side.
また、噴射ガスの出口１４から排出された噴射ガスはガ
ス中に含まれる水分等の不純物を取除いて循環使用して
もよい。Further, the injection gas discharged from the injection gas outlet 14 may be recycled and used after removing impurities such as moisture contained in the gas.
しかしてクロスヘッド１で導体１５上にゴム、プラスチ
ック特にポリエチレン絶縁被覆を施された未架橋状態の
ゴム、プラスチック絶縁ケーブル１６は加熱部３と冷却
部５に順次導入され架橋冷却される。An uncrosslinked rubber or plastic insulated cable 16 having a conductor 15 coated with rubber, particularly polyethylene insulation, is sequentially introduced into a heating section 3 and a cooling section 5 to be crosslinked and cooled.
この際、ガス噴射シール部７のガス噴射口１１からガス
が２〜４Ｑｍ／ｓの流速で噴射されるので、冷却部５の
冷却水面から発生する水蒸気が該ケーブルの絶縁層内に
侵入したり、冷却媒体がガスの場合、これと加熱媒体と
が相互に混合するのを防止することができる。At this time, since gas is injected from the gas injection port 11 of the gas injection seal part 7 at a flow rate of 2 to 4 Qm/s, water vapor generated from the cooling water surface of the cooling part 5 may not enter the insulation layer of the cable. If the cooling medium is a gas, it is possible to prevent the cooling medium and the heating medium from mixing with each other.
以上のように本考案はガス系の加熱媒体が収容された加
熱部と冷却媒体が収容された冷却部との境界部付近に、
ガス噴射口を導し架橋管に取付けられる環状部材と、ガ
ス噴射口と対向する側の環状部材の内周面に形成されガ
ス噴射口から架橋管内を横切って噴射されたガスの流れ
方向を変える突起片とを備えたガス噴射シール部を設け
てなるので、噴射ガス流が冷却部側へ向けられた場合に
は、噴射ガス流の噴射力により冷却媒体が加熱部側へ侵
入するのが大きく抑制され、反対に噴射ガス流が加熱部
側へ向けられた場合には加熱媒体が冷却部側へ侵入する
のが大きく抑制され、更に噴射ガス流が冷却部側と加熱
部側へ分流して同時に向けられた場合にも両媒体が相手
側部内へ侵入するのが大きく抑制され、加熱媒体と冷却
媒体の混合が確実に防止され、ケーブルの加熱、冷却効
率が向上してケーブルを速やかに製造することができる
ほか、加熱、冷却に要する費用を安くすることができる
。As described above, in the present invention, near the boundary between the heating part containing the gas-based heating medium and the cooling part containing the cooling medium,
An annular member that guides the gas injection port and is attached to the bridge pipe, and is formed on the inner peripheral surface of the annular member on the side facing the gas injection port to change the flow direction of the gas injected from the gas injection port across the inside of the bridge pipe. Since the gas injection seal portion is provided with a protruding piece, when the injection gas flow is directed toward the cooling part side, the injection force of the injection gas flow greatly prevents the cooling medium from intruding into the heating part side. On the other hand, when the jet gas flow is directed toward the heating section, the heating medium is greatly inhibited from entering the cooling section, and furthermore, the jet gas flow is divided into the cooling section and the heating section. Even when they are directed at the same time, the intrusion of both media into the other side is greatly suppressed, and mixing of the heating medium and cooling medium is reliably prevented, improving cable heating and cooling efficiency and allowing cables to be manufactured quickly. In addition, the costs required for heating and cooling can be reduced.
また両媒体の混合防止に特殊バッキングを使用しないの
で経済的であり、且つバッキングの摩耗により又はケー
ブルサイズがかわる毎に、バッキングを取替える面倒な
作業を必要とせず、設備の稼動率が向上し良品質のケー
ブルを能率よく製造することができる。In addition, it is economical because no special backing is used to prevent the two media from mixing, and there is no need for the troublesome work of replacing the backing every time the backing wears out or the cable size changes, improving the operating rate of the equipment. High quality cables can be manufactured efficiently.
また冷却媒体が冷却水の場合でも、冷却水面から発生す
る水蒸気がガス噴射シール部により完全に遮断され加熱
部内に入るのを防止でき、従ってケーブルの絶縁層内に
水蒸気が侵入してミクロボイドを形成することがなく、
６０Ｋｖ以上の高電圧ケーブルの場合でも電気特性に悪
影響をおよぼすのを防止することができる。In addition, even when the cooling medium is cooling water, the water vapor generated from the surface of the cooling water is completely blocked by the gas injection seal part and prevented from entering the heating part. Therefore, the water vapor enters the insulation layer of the cable and forms microvoids. There's nothing to do,
Even in the case of a high voltage cable of 60 Kv or more, it is possible to prevent the electrical characteristics from being adversely affected.
更にガス系の加熱媒体下でケーブルを赤外線ヒータで加
熱し架橋するようにした場合でも、該ヒータが水蒸気に
より損傷したり短期間で使用できなくなることがなく、
輻射効率の低下を防止することができる。Furthermore, even if the cable is heated and crosslinked with an infrared heater under a gas-based heating medium, the heater will not be damaged by water vapor or become unusable in a short period of time.
Decrease in radiation efficiency can be prevented.
第１図は本考案の一実施例を示す説明図、第２図は本考
案の要部を示す拡大縦断面図、第３図は第２図のＡ−Ａ
線横断面図である。
３・・・・・・加熱部、５・・・・・・冷却部、７・・
・・・・ガス噴射シール部、１６・・・・・・ゴム、プ
ラスチック絶縁ケーブル。Fig. 1 is an explanatory diagram showing one embodiment of the present invention, Fig. 2 is an enlarged vertical sectional view showing the main parts of the invention, and Fig. 3 is an A-A in Fig. 2.
FIG. 3... Heating section, 5... Cooling section, 7...
...Gas injection seal part, 16...Rubber, plastic insulated cable.
Claims (1)
橋管内に冷却媒体が収容された冷却部とを互いに連設し
、加熱部と冷却部に未架橋状態のゴム、プラスチック絶
縁ケーブルを導入して架橋冷却するものにおいて、前記
加熱部と冷却部との境界部付近に、ガス噴射口を有し架
橋管に取付けられる環状部材と、ガス噴射口と対向する
側の環状部材の内周面に形成されガス噴射口から架橋管
内を横切って噴射されたガスの流れ方向を変える突起片
とを備え、加熱媒体と冷却媒体との混合を防止するガス
噴射シール部を設けてなるゴム、プラスチック絶縁ケー
ブルの架橋冷却装置。A heating section containing a gas-based heating medium in a cross-linked pipe and a cooling section containing a cooling medium in a cross-linked pipe are connected to each other, and uncrosslinked rubber or plastic insulated cables are connected to the heating section and the cooling section. In the device for cross-linking cooling, an annular member having a gas injection port and attached to the bridge pipe near the boundary between the heating section and the cooling section, and an inner periphery of the annular member on the side facing the gas injection port. Rubber or plastic comprising a protruding piece formed on the surface to change the flow direction of gas injected from the gas injection port across the inside of the bridge pipe, and provided with a gas injection seal part that prevents mixing of the heating medium and the cooling medium. Cross-linking cooling device for insulated cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980041703U JPS5827448Y2 (en) | 1980-03-29 | 1980-03-29 | Crosslinking and cooling equipment for rubber and plastic insulated cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980041703U JPS5827448Y2 (en) | 1980-03-29 | 1980-03-29 | Crosslinking and cooling equipment for rubber and plastic insulated cables |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56143733U JPS56143733U (en) | 1981-10-29 |
| JPS5827448Y2 true JPS5827448Y2 (en) | 1983-06-15 |
Family
ID=29637094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980041703U Expired JPS5827448Y2 (en) | 1980-03-29 | 1980-03-29 | Crosslinking and cooling equipment for rubber and plastic insulated cables |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5827448Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5478479A (en) * | 1977-12-02 | 1979-06-22 | Fujikura Ltd | Making of cable coated with rubber or plastic |
-
1980
- 1980-03-29 JP JP1980041703U patent/JPS5827448Y2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5478479A (en) * | 1977-12-02 | 1979-06-22 | Fujikura Ltd | Making of cable coated with rubber or plastic |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56143733U (en) | 1981-10-29 |
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