CN112452120A - Submarine cable dehumidification device and method - Google Patents
Submarine cable dehumidification device and method Download PDFInfo
- Publication number
- CN112452120A CN112452120A CN202011090595.6A CN202011090595A CN112452120A CN 112452120 A CN112452120 A CN 112452120A CN 202011090595 A CN202011090595 A CN 202011090595A CN 112452120 A CN112452120 A CN 112452120A
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- submarine cable
- submarine
- cable
- dry gas
- air
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- 238000007791 dehumidification Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 238000000605 extraction Methods 0.000 claims description 14
- 239000000565 sealant Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 208000034693 Laceration Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/02—Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a submarine cable dehumidification device, which comprises: the heating device is used for heating the submarine cable; and one end of the exhaust pipe is hermetically connected with the submarine cable through an adjustable submarine cable interface, and the other end of the exhaust pipe is respectively connected with the dry gas compression tank and the exhaust pump through pipelines. In addition, the invention also discloses a submarine cable dehumidification method. Compared with the prior art, the submarine cable dehumidification device and method provided by the invention can reduce the waste of submarine cables and overcome the defect of poor dehumidification effect caused by insufficient personal experience.
Description
Technical Field
The invention belongs to the field of offshore wind farm intelligent operation and maintenance platforms, and particularly relates to a submarine cable dehumidification device and method.
Background
In recent years, as offshore wind farms and submarine power transmission projects have increased, the number of submarine cables laid has also increased. Because the offshore laying is greatly influenced by weather, the condition that wind shielding is needed in the laying process often occurs, and the submarine cable joint needing to be terminated is lead-sealed and then is sunk into the seabed. In emergency, even the submarine cable which is being laid needs to be cut off, the breakpoint submarine cable head is completely immersed into the seabed after being lead-sealed, and the submarine cable is laid after the weather improves. Although the cable head sinking into the sea bottom is protected by the lead seal, the sea bottom has a dark current and a surge, and the lead-sealed sea bottom cable head is often damaged under the action of external force. Due to the high pressure on the sea floor, seawater can enter the submarine cable through the lacerations, so that the submarine cable is subjected to water inflow and dampness. In addition, because the submarine cable is buried in the sea floor, the submarine cable is easily broken when being pulled by an anchored ship, and seawater enters the submarine cable from the broken point due to pressure, so that the submarine cable is affected with water and damp.
Because the submarine cable is laid with uncertainty, a longer laying degree is usually reserved when the submarine cable is laid, and when the submarine cable is in water and is affected with damp, the damp submarine cable is usually cut off and is re-terminated by the submarine cable which is not affected with damp. When too much water is fed and the longer submarine cable needs to be cut off, a new cable needs to be spliced to meet the length requirement.
In the related art, a scheme of cutting out a long submarine cable, completely cutting out a wet part and reserving a dry submarine cable is generally adopted. However, since the submarine cable is very expensive, if a long submarine cable is cut until no water is left inside the submarine cable, it is easy to cause economic waste. In addition, once the cut length exceeds the laying allowance, cable adapters and new cables need to be added, the manufacturing cost is higher, and the maintenance time is longer.
In the related art, a scheme that only a small amount of submarine cables are intercepted, most of submarine cables which are internally affected with damp are reserved, and the damp degree is reduced through heating and dehumidifying is adopted. However, the shorter submarine cable is intercepted until no water exists in the submarine cable, the submarine cable is dehumidified by the cable heater, and the submarine cable dehumidification effect is judged by the experience of technicians. The disadvantages of this solution are: the dehumidification effect of the submarine cable cannot be objectively and qualitatively analyzed, moisture is sealed in the conductive layer in a short time, but after the submarine cable runs for a long time, the sealed moisture gradually expands through aging gaps of the cable due to heat and a magnetic field generated by through-flow of the submarine cable, and a breakdown point is easily formed. In addition, the effect of heating and dehumidifying the cable under normal pressure is slow, and long-time heating is needed for dehumidifying.
In view of the above, it is necessary to provide an economical and reliable submarine cable dehumidification device and method.
Disclosure of Invention
The invention aims to: the defects of the prior art are overcome, and an economical and reliable submarine cable dehumidification device and method are provided.
In order to achieve the above object, the present invention provides a submarine cable dehumidifying apparatus, comprising:
the heating device is used for heating the submarine cable; and
one end of the exhaust pipe is hermetically connected with the submarine cable through an adjustable submarine cable interface, and the other end of the exhaust pipe is respectively connected with the dry gas compression tank and the exhaust pump through pipelines.
As an improvement of the submarine cable dehumidification device, a pipeline of the dry gas compression tank connected with the exhaust pipe is provided with a dry gas valve.
As an improvement of the submarine cable dehumidification device, an air exhaust valve is arranged on a pipeline of the air exhaust pump connected with the air exhaust pipe.
As an improvement of the submarine cable dehumidification device, the adjustable submarine cable interface is connected with the submarine cable in a sealing mode through sealant.
As an improvement of the submarine cable dehumidification device, a hygrometer is arranged in the exhaust pipe.
In order to achieve the above object, the present invention also provides a submarine cable dehumidifying method, which comprises the steps of:
1) one end of the exhaust pipe is hermetically connected with the submarine cable through an adjustable submarine cable interface, and the other end of the exhaust pipe is connected with the dry gas compression tank through a dry gas valve and connected with the exhaust pump through the exhaust valve;
2) slowly heating the submarine cable by using a heating device;
3) opening an air suction valve, closing a dry gas valve, and starting an air suction pump to perform at least one-time air suction on an air suction pipe until the interior of the submarine cable reaches a preset negative pressure; and
4) and closing the air extraction valve, stopping the air extraction pump, opening the dry gas valve, and filling dry gas into the submarine cable.
As an improvement of the submarine cable dehumidification method of the invention, in the step 1), the submarine cable head is sleeved into the adjustable submarine cable interface and sealed by a sealant.
As an improvement of the submarine cable dehumidification method according to the present invention, in step 3), when the negative pressure inside the submarine cable is Pi ═ n × L2/(L1+ L2), the suction pump is stopped, where L1 is the length of the submarine cable dry area, L2 is the length of the submarine cable wet area, and n is the number of cycles.
As an improvement of the submarine cable dehumidification method, in the step 3), air extraction is performed for multiple times, and the time interval between two adjacent air extractions is 15-20 minutes.
As an improvement of the submarine cable dehumidification method according to the present invention, in step 3), the humidity of the extracted air is monitored by a hygrometer disposed in the extraction pipe each time the extraction pump is started to extract air.
Compared with the prior art, the submarine cable dehumidification device and method provided by the invention can reduce the waste of submarine cables and overcome the defect of poor dehumidification effect caused by insufficient personal experience.
Drawings
The submarine cable dehumidification apparatus and method of the present invention are described in detail below with reference to the accompanying drawings and detailed description, wherein:
fig. 1 is a schematic structural view of a submarine cable dehumidification device according to the present invention.
Fig. 2 is a schematic diagram of a submarine cable drying zone and a submarine cable wetting zone in the submarine cable dehumidification method according to the present invention.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the present invention provides a submarine cable dehumidifying apparatus, which includes:
a heating device (not shown) for heating the submarine cable; and
one end of the gas extraction pipe 10 is hermetically connected with a submarine cable through an adjustable submarine cable interface 100, and the other end of the gas extraction pipe 10 is respectively connected with a dry gas compression tank 20 and a gas extraction pump 30 through pipelines;
the pipeline of the dry gas compression tank 30 connected with the gas pumping pipe 10 is provided with a dry gas valve 300, the pipeline of the gas pumping pump 20 connected with the gas pumping pipe 10 is provided with a gas pumping valve 200, and one end of the gas pumping pump 20 far away from the submarine cable is connected with the atmosphere environment through an exhaust port 202.
According to an embodiment of the submarine cable dehumidification device, the adjustable submarine cable interface 100 is hermetically connected with the submarine cable through a sealant, and a hygrometer 40 is arranged in the exhaust pipe 10, wherein the hygrometer 40 is used for monitoring the humidity in the exhaust pipe 10.
The submarine cable dehumidification method of the present invention is described in detail below with reference to fig. 1 and 2, and comprises the following steps:
1) one end of the air suction pipe 10 is hermetically connected with the submarine cable through the adjustable submarine cable interface 100 (for example, the submarine cable head is sleeved into the adjustable submarine cable interface 100 and sealed by sealant), and the other end is respectively connected with the dry gas compression tank 30 through the dry gas valve 300 and the air suction pump 20 through the air suction valve 200;
2) slowly heating the submarine cable by using a heating device, wherein in the process, moisture in a wet area of the submarine cable is evaporated;
3) opening the suction valve 200, closing the dry gas valve 300, and starting the suction pump 20 to suck the air from the suction pipe 10 at least once, during which the interface between the dry area and the wet area of the submarine cable moves to the right (L2 is shortened as shown in fig. 2), until the interior of the submarine cable reaches a predetermined negative pressure; and
4) the suction valve 200 is closed, the suction pump 20 is stopped, the dry gas valve 300 is opened, and dry gas is filled into the submarine cable to prevent the humid gas in the air from invading the submarine cable.
According to an embodiment of the submarine cable dehumidification method, in step 3), the air pumping is repeated for a plurality of times, and the time interval between two adjacent air pumping is 15-20 minutes (waiting for the inner wall of the submarine cable in the wet area to have a high humidity, but the air in the area is relatively dry, so that the water on the inner wall of the submarine cable volatilizes into the air), and the air pumping pump is stopped until the predetermined negative pressure inside the submarine cable is Pi ═ n × L2/(L1+ L2), wherein L1 is the length of the dry area of the submarine cable, L2 is the length of the wet area of the submarine cable, and n is the number of cycles (as shown in fig. 2).
According to one embodiment of the method for dehumidifying a submarine cable according to the present invention, in step 3), every time the suction pump 20 is activated to perform suction, the humidity of the suction air is monitored by the hygrometer 40 disposed in the suction pipe 10. For example, if the humidity meets the specification (e.g., 60%), then the dehumidification is complete.
Compared with the prior art, the submarine cable dehumidification device and method provided by the invention can reduce the waste of submarine cables and overcome the defect of poor dehumidification effect caused by insufficient personal experience.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A submarine cable dehumidification device, comprising:
the heating device is used for heating the submarine cable; and
one end of the exhaust pipe is hermetically connected with the submarine cable through an adjustable submarine cable interface, and the other end of the exhaust pipe is respectively connected with the dry gas compression tank and the exhaust pump through pipelines.
2. The submarine cable dehumidification device according to claim 1, wherein a dry gas valve is disposed on a pipeline connecting the dry gas compression tank and the suction pipe.
3. The submarine cable dehumidification device according to claim 1, wherein an air suction valve is disposed on a pipeline of the air suction pump connected to the air suction pipe.
4. The submarine cable dehumidification device according to claim 1, wherein said adjustable submarine cable interface is sealingly connected to the submarine cable by a sealant.
5. A submarine cable dehumidification apparatus according to claim 1, wherein a hygrometer is provided within said extraction duct.
6. A method of dehumidifying a submarine cable, comprising the steps of:
1) one end of the exhaust pipe is hermetically connected with the submarine cable through an adjustable submarine cable interface, and the other end of the exhaust pipe is connected with the dry gas compression tank through a dry gas valve and connected with the exhaust pump through the exhaust valve;
2) slowly heating the submarine cable by using a heating device;
3) opening an air suction valve, closing a dry gas valve, and starting an air suction pump to perform at least one-time air suction on an air suction pipe until the interior of the submarine cable reaches a preset negative pressure; and
4) and closing the air extraction valve, stopping the air extraction pump, opening the dry gas valve, and filling dry gas into the submarine cable.
7. The method for dehumidifying submarine cables according to claim 6, wherein in step 1), the submarine cable head is sleeved in the adjustable submarine cable interface and sealed by a sealant.
8. The method for dehumidifying an ocean cable according to claim 6, wherein in the step 3), the suction pump is stopped when the negative pressure inside the ocean cable is Pi ═ n × L2/(L1+ L2), wherein L1 is the length of the dry area of the ocean cable, L2 is the length of the wet area of the ocean cable, and n is the number of cycles.
9. Method for dehumidifying submarine cables according to claim 8, wherein in step 3) a plurality of extractions are performed, the time interval between two consecutive extractions being 15-20 minutes.
10. Method for dehumidifying a submarine cable according to claim 9, wherein in step 3), the humidity of the bleed air is monitored by a hygrometer placed in the bleed air duct each time the bleed air pump is activated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011090595.6A CN112452120A (en) | 2020-10-13 | 2020-10-13 | Submarine cable dehumidification device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011090595.6A CN112452120A (en) | 2020-10-13 | 2020-10-13 | Submarine cable dehumidification device and method |
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| Publication Number | Publication Date |
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| CN112452120A true CN112452120A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011090595.6A Pending CN112452120A (en) | 2020-10-13 | 2020-10-13 | Submarine cable dehumidification device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113380468A (en) * | 2021-06-22 | 2021-09-10 | 四川大学 | Cable dehumidification method based on microwave injection heating and vacuum air extraction |
| CN115419571A (en) * | 2022-08-30 | 2022-12-02 | 广东电网有限责任公司 | Automatic cable dewatering and dehumidifying device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4944776A (en) * | 1989-10-05 | 1990-07-31 | Andrew Corporation | Dehumidifier for waveguide system |
| CN203037029U (en) * | 2012-12-05 | 2013-07-03 | 国家电网公司 | Drying treatment device for waterlogged power cable |
| CN104716599A (en) * | 2015-03-30 | 2015-06-17 | 中国矿业大学(北京) | Quick repairing technology for high voltage cable which enables water to enter and is affected with dampness |
| WO2015165313A1 (en) * | 2014-04-30 | 2015-11-05 | 广东工业大学 | Adsorption dehumidification process method and apparatus |
| CN207504531U (en) * | 2017-12-14 | 2018-06-15 | 国网江苏省电力公司苏州供电公司 | Cable core dehumidification equipment |
| CN110470106A (en) * | 2019-09-03 | 2019-11-19 | 海南电网有限责任公司电力科学研究院 | A kind of power cable moisture removal platform and method |
| CN110994437A (en) * | 2019-11-22 | 2020-04-10 | 重庆泰山电缆有限公司 | High-voltage cable water inlet treatment method |
| CN211041633U (en) * | 2019-11-21 | 2020-07-17 | 山西昶宇电力自动化有限公司 | Heating, dehumidifying and moisture-absorbing device for mine cable |
-
2020
- 2020-10-13 CN CN202011090595.6A patent/CN112452120A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4944776A (en) * | 1989-10-05 | 1990-07-31 | Andrew Corporation | Dehumidifier for waveguide system |
| CN203037029U (en) * | 2012-12-05 | 2013-07-03 | 国家电网公司 | Drying treatment device for waterlogged power cable |
| WO2015165313A1 (en) * | 2014-04-30 | 2015-11-05 | 广东工业大学 | Adsorption dehumidification process method and apparatus |
| CN104716599A (en) * | 2015-03-30 | 2015-06-17 | 中国矿业大学(北京) | Quick repairing technology for high voltage cable which enables water to enter and is affected with dampness |
| CN207504531U (en) * | 2017-12-14 | 2018-06-15 | 国网江苏省电力公司苏州供电公司 | Cable core dehumidification equipment |
| CN110470106A (en) * | 2019-09-03 | 2019-11-19 | 海南电网有限责任公司电力科学研究院 | A kind of power cable moisture removal platform and method |
| CN211041633U (en) * | 2019-11-21 | 2020-07-17 | 山西昶宇电力自动化有限公司 | Heating, dehumidifying and moisture-absorbing device for mine cable |
| CN110994437A (en) * | 2019-11-22 | 2020-04-10 | 重庆泰山电缆有限公司 | High-voltage cable water inlet treatment method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113380468A (en) * | 2021-06-22 | 2021-09-10 | 四川大学 | Cable dehumidification method based on microwave injection heating and vacuum air extraction |
| CN115419571A (en) * | 2022-08-30 | 2022-12-02 | 广东电网有限责任公司 | Automatic cable dewatering and dehumidifying device |
| CN115419571B (en) * | 2022-08-30 | 2024-04-12 | 广东电网有限责任公司 | Automatic dehydrating and dehumidifying device for cable |
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Application publication date: 20210309 |
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