JPH038035Y2 - - Google Patents
Info
- Publication number
- JPH038035Y2 JPH038035Y2 JP1984095699U JP9569984U JPH038035Y2 JP H038035 Y2 JPH038035 Y2 JP H038035Y2 JP 1984095699 U JP1984095699 U JP 1984095699U JP 9569984 U JP9569984 U JP 9569984U JP H038035 Y2 JPH038035 Y2 JP H038035Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- differential pressure
- cable
- emergency
- pump
- 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
- 238000001514 detection method Methods 0.000 claims 1
- 230000008439 repair process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010008 shearing Methods 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)
Description
【考案の詳細な説明】
産業上の利用分野
本考案はOFケーブルの緊急用給油装置の改良
に関するものである。[Detailed Description of the Invention] Industrial Field of Application The present invention relates to an improvement of an emergency refueling device for OF cables.
先行技術と問題点
長尺海底OFケーブルにおいては、負荷投入・
しや断に伴う油量変化が著しく大であり、かゝる
条件下でも、安定な給油を行うため、ポンプ式給
油装置を使用している。Prior art and problems In long submarine OF cables, load injection and
The amount of oil changes significantly due to shearing, and in order to provide stable oil supply even under such conditions, a pump-type oil supply system is used.
ところで、OFケーブルに油漏れ事故が生じた
場合、事故点の修理着手までの間、その事故点か
ら所定油量の油を流出させて、OFケーブル内へ
の水の侵入をを防止することが不可欠である。 By the way, if an oil leak accident occurs in the OF cable, it is possible to prevent water from entering the OF cable by letting a specified amount of oil leak from the accident point until repairs can be started. It is essential.
而るに、海底OFケーブルの場合は、事故点修理
着手までに長時間を要し、また、海洋汚染の防止
も必要であるので、上記事故点からの油の流出制
御は特に厳格に行なわなければならない。However, in the case of submarine OF cables, it takes a long time to repair the accident point, and it is also necessary to prevent marine pollution, so oil leakage from the accident point must be particularly strictly controlled. Must be.
上記事故点からの油流出量は、ケーブル給油点
からケーブル事故点までの油流抵抗に反比例し、
この油流抵抗は事故点までの距離に応じ相違する
から、通常の場合、事故点が異るごとに事故点か
らの油流出量も相異し、適正なケーブル保全並び
に海洋汚染防止を達成し難い。このため、緊急用
給油系に自動流量調節装置を挿入し、ケーブル故
障点の位置に関係なしに事故点流出油量を所定の
一定値に保持することが検討されている。 The amount of oil spilled from the above accident point is inversely proportional to the oil flow resistance from the cable lubrication point to the cable accident point.
Since this oil flow resistance differs depending on the distance to the accident point, normally the amount of oil flowing from the accident point differs depending on the accident point, and it is difficult to achieve proper cable maintenance and marine pollution prevention. hard. For this reason, it is being considered to insert an automatic flow rate adjustment device into the emergency oil supply system to maintain the amount of oil spilled at the accident point at a predetermined constant value regardless of the location of the cable failure point.
しかしながら、上記事故点油流抵抗の相違に基
づく油圧変化（以下、二次側油圧変化という）の
範囲は広く、従来の自動流量調節装置において
は、この広い圧力範囲にわたつて事故点油流出量
を一定にすることが困難である。また、自動流量
調節装置にケーブル内油圧を直接にフイードバツ
クさせており、このフイードバツク通路の存在の
ために油の粘度の影響を受け易いといつた不利も
ある（温度による油の粘度変化のために油の流動
抵抗が変化し、これが制御特性に影響を与え、温
度に対する微調整手段が必要となり、装置が複雑
化する）。 However, the range of oil pressure changes (hereinafter referred to as secondary oil pressure changes) based on the difference in oil flow resistance at the accident point is wide, and in conventional automatic flow control devices, the amount of oil spilled at the accident point can be adjusted over this wide pressure range. It is difficult to maintain a constant value. In addition, the oil pressure in the cable is directly fed back to the automatic flow rate adjustment device, which has the disadvantage of being easily affected by the viscosity of the oil due to the presence of this feedback passage (because the viscosity of the oil changes due to temperature). The flow resistance of the oil changes, which affects the control characteristics, requires means for fine-tuning the temperature, and complicates the equipment).
考案の目的
本考案の目的は、広い二次側圧力範囲にわた
り、かつ、油の粘度の影響を充分に排除して、
OFケーブル事故点の油流出量を一定になし得る
ポンプ式緊急用給油装置を提供することにある。Purpose of the invention The purpose of the invention is to cover a wide outlet pressure range and sufficiently eliminate the influence of oil viscosity.
An object of the present invention is to provide a pump-type emergency oil supply device that can keep the amount of oil flowing out from an OF cable accident point constant.
考案の構成
本考案に係るOFケーブルの緊急用給油装置は、
貯油槽の絶縁油を緊急用ポンプによりOFケーブ
ルに給油する緊急用給油装置において、ポンプと
OFケーブルとの間の給油通路中に、ポンプ側か
ら順次、流量制御弁、オリフイスならびに流量ス
イツチを設け、前記オリフイスには、流入側と流
出側の差圧を検出する差圧計を設置すると共にこ
の差圧計による差圧検出圧力値を空気圧に変換し
て制御器へ伝送する差圧伝送器を設けてなり、前
記制御器から基準圧力値と前記差圧検出圧力値と
の差を出力させることにより流量制御弁の開度を
自動的に制御するように構成してなることを特徴
とする構成である。Composition of the invention The OF cable emergency refueling device according to the invention is
In an emergency oil supply system that uses an emergency pump to supply insulating oil from the oil storage tank to the OF cable, the pump and
A flow rate control valve, an orifice, and a flow rate switch are installed in the oil supply passage between the OF cable and the pump side in order from the pump side, and a differential pressure gauge is installed in the orifice to detect the differential pressure between the inflow side and the outflow side. A differential pressure transmitter is provided that converts a pressure value detected by a differential pressure gauge into air pressure and transmits it to a controller, and the controller outputs the difference between a reference pressure value and the detected differential pressure value. This configuration is characterized in that it is configured to automatically control the opening degree of the flow rate control valve.
実施例の説明 以下、図面により本考案を説明する。Description of examples The present invention will be explained below with reference to the drawings.
図において、１は海底布設OFケーブルである。
２は貯油槽であり、平常用並びに緊急用に併用し
てある。Ａは平常用の給油装置を示しており、ポ
ンプ３０、リリーフ弁４０、圧力スイツチＰ等か
ら構成してある。Ｂは本考案に係る緊急用給油装
置を示している。３は緊急用のキヤンドルポン
プ、４はリリーフ弁である。５は緊急用ポンプ３
とケーブル給油点６との間の緊急用給油通路、７
は給油通路５中に挿入せる流量制御弁、例えばニ
ードルバルブである。８はオリフイス、９はオリ
フイス８の差圧を検出する差圧計である。１１は
差圧伝送器であり、上記の差圧P1を空気圧また
は電気量に変換し、該空気圧にて差圧P1を伝送
するものである。１２は制御器であり、基準圧力
値P2と上記差圧値P1との差P1−P2を出力し（こ
の出力も例えば空気圧、電気量である）、この出
力で上記の流量制御弁７を制御するものである。 In the figure, 1 is a submarine-laid OF cable.
2 is an oil storage tank, which is used both for normal use and for emergency use. A indicates a normal oil supply system, which is composed of a pump 30, a relief valve 40, a pressure switch P, and the like. B shows an emergency refueling device according to the present invention. 3 is an emergency candle pump, and 4 is a relief valve. 5 is emergency pump 3
emergency refueling passage between and cable refueling point 6, 7
is a flow control valve inserted into the oil supply passage 5, such as a needle valve. 8 is an orifice, and 9 is a differential pressure gauge for detecting the differential pressure of the orifice 8. Reference numeral 11 denotes a differential pressure transmitter, which converts the above-mentioned differential pressure P 1 into air pressure or electrical quantity, and transmits the differential pressure P 1 using the air pressure. 12 is a controller that outputs the difference P 1 - P 2 between the reference pressure value P 2 and the above-mentioned differential pressure value P 1 (this output is also, for example, air pressure or electric quantity), and uses this output to control the above-mentioned flow rate. It controls the valve 7.
Ｆは流量スイツチであり、ケーブルに油漏れが
生じ、流量スイツチを流れる流量が所定値に達す
ると、緊急用ポンプ３が作動し、流量制御弁７、
オリフイス８を経てケーブル１に絶縁油が緊急に
給油される。このオリフイス８の流体抵抗をＲと
し、設定しようとする流量をとする。而して、
基準圧力値P2をＲに設定すれば、制御弁１２
の出力が零となるように流量量制御弁７の開度が
自動的に調整され、オリフイス８の流量が上記し
たに設定される。この流量設定は、ケーブル事
故点に致るまでの油流抵抗、すなわち、二次側圧
力に制約なく行うことでき、油流抵抗または二次
側圧力に応じて流量制御弁７の最終的開度が異る
だけである。而して、ケーブル近端に油漏れ事故
が起つたときの油流抵抗に対しての開度をα1、ケ
ーブル遠端に油漏れ事故が起つたときの油流抵抗
に対しての開度をα2とすると、上記流量制御弁７
の動作開度α1〜α2の範囲内である。 F is a flow rate switch, and when an oil leak occurs in the cable and the flow rate flowing through the flow rate switch reaches a predetermined value, the emergency pump 3 is activated and the flow rate control valves 7,
Insulating oil is urgently supplied to the cable 1 via the orifice 8. Let R be the fluid resistance of this orifice 8, and let R be the flow rate to be set. Then,
If the reference pressure value P2 is set to R, the control valve 12
The opening degree of the flow rate control valve 7 is automatically adjusted so that the output becomes zero, and the flow rate of the orifice 8 is set as described above. This flow rate setting can be performed without any restriction on the oil flow resistance up to the cable failure point, that is, the secondary side pressure, and the final opening of the flow rate control valve 7 is determined according to the oil flow resistance or the secondary side pressure. The only difference is that Therefore, α 1 is the opening relative to oil flow resistance when an oil leakage accident occurs at the near end of the cable, and α 1 is the opening relative to oil flow resistance when an oil leakage accident occurs at the far end of the cable. is α 2 , the above flow rate control valve 7
The operating opening degree is within the range of α 1 to α 2 .
考案の効果
上述した通り本考案に係るOFケーブルの緊急
用給油装置によれば、油漏れ事故時の事故点吐出
油量を事故点の位置に関係なく一定になし得る。
また、オリフイスの差圧を制御信号源に用いてお
り、信号源がケーブル側圧力に無関係であるか
ら、ほとんど二次側圧力の影響を受けることな
く、事故点吐出油量の制御を行い得る。更に、上
記差圧をケーブル絶縁油とは別の媒体、例えば空
気圧によつてフイードバツクさせており、ケーブ
ル絶縁油の直接的なフイードバツクを排除したか
ら、制御特性が油の粘度によつて影響されること
もほとんどない。Effects of the Invention As described above, according to the OF cable emergency oil supply device according to the present invention, the amount of oil discharged at the accident point in the event of an oil leakage accident can be made constant regardless of the position of the accident point.
Further, since the differential pressure of the orifice is used as the control signal source and the signal source is unrelated to the cable side pressure, the amount of oil discharged at the accident point can be controlled almost unaffected by the secondary side pressure. Furthermore, since the above differential pressure is fed back by a medium other than the cable insulating oil, such as air pressure, and the direct feedback of the cable insulating oil is eliminated, the control characteristics are affected by the viscosity of the oil. Very rarely.
図面は本考案に係るOFケーブルの緊急用給油
装置を示す説明図である。
図において、１はOFケーブル、２は貯油槽、
３は緊急用ポンプ、４はリリーフ弁、７は流量制
御弁、８はオリフイス、９は差圧計、１１は圧力
伝送器、１２は制御器である。
The drawing is an explanatory diagram showing an OF cable emergency refueling device according to the present invention. In the figure, 1 is the OF cable, 2 is the oil storage tank,
3 is an emergency pump, 4 is a relief valve, 7 is a flow control valve, 8 is an orifice, 9 is a differential pressure gauge, 11 is a pressure transmitter, and 12 is a controller.
Claims (1)
ブルに給油する緊急用給油装置において、ポンプ
とOFケーブルとの間の給油通路中に、ポンプ側
から順次、流量制御弁、オリフイスならびに流量
スイツチを設け、前記オリフイスには、流入側と
流出側の差圧を検出する差圧計を設置すると共に
この差圧計による差圧検出圧力値を空気圧に変換
して制御器へ伝送する差圧伝送器を設けてなり、
前記制御器から基準圧力値と前記差圧検出圧力値
との差を出力させることにより流量制御弁の開度
を自動的に制御するように構成してなることを特
徴とするOFケーブルの緊急用給油装置。 In an emergency oil supply system that supplies insulating oil from an oil storage tank to an OF cable using an emergency pump, a flow control valve, an orifice, and a flow rate switch are installed in the oil supply passage between the pump and the OF cable in order from the pump side. The orifice is equipped with a differential pressure gauge that detects the differential pressure between the inflow side and the outflow side, and a differential pressure transmitter that converts the differential pressure detected by the differential pressure gauge into air pressure and transmits it to the controller. ,
An emergency use OF cable, characterized in that the controller is configured to automatically control the opening degree of the flow control valve by outputting the difference between the reference pressure value and the differential pressure detection pressure value. Refueling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9569984U JPS6113537U (en) | 1984-06-25 | 1984-06-25 | OF cable emergency lubrication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9569984U JPS6113537U (en) | 1984-06-25 | 1984-06-25 | OF cable emergency lubrication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6113537U JPS6113537U (en) | 1986-01-27 |
| JPH038035Y2 true JPH038035Y2 (en) | 1991-02-27 |
Family
ID=30654946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9569984U Granted JPS6113537U (en) | 1984-06-25 | 1984-06-25 | OF cable emergency lubrication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6113537U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611568U (en) * | 1979-07-05 | 1981-01-31 |
-
1984
- 1984-06-25 JP JP9569984U patent/JPS6113537U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611568U (en) * | 1979-07-05 | 1981-01-31 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6113537U (en) | 1986-01-27 |
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