CN112133483A

CN112133483A - Submarine cable conductor and manufacturing method

Info

Publication number: CN112133483A
Application number: CN202010960758.5A
Authority: CN
Inventors: 徐文皓; 赵恒�
Original assignee: Chongqing Taishan Cable Co Ltd
Current assignee: Chongqing Taishan Cable Co Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2020-12-25

Abstract

The invention discloses a submarine cable conductor which comprises a plurality of conductor single wires, wherein special silicon rubber is coated outside the conductor single wires in a saturated mode, the special silicon rubber contains water-blocking powder, and the mass of the water-blocking powder accounts for 3% -10% of that of the special silicon rubber. When the insulating layer of the cable conductor related by the invention leaks, the conductor can block water, and the maintenance cost is reduced.

Description

Submarine cable conductor and manufacturing method

Technical Field

The present invention relates to a conductor and a method for manufacturing the conductor, and more particularly, to a submarine cable conductor and a method for manufacturing the conductor.

Background

With the gradual maturity of wind power generation technology in China, wind power units on the sea level increase year by year, sea wind is also the most environment-friendly energy granted by the nature, and electric energy generated by the sea-mounted wind power units is transmitted to the land through submarine cables for people to use, so that the demand of the submarine cables increases gradually.

Submarine cables are usually laid offshore, and when large ships are parked or approached, the ship anchors of the submarine cables may damage the cable body, and if the cable conductors cannot effectively block water, the maintenance cost and period are greatly increased once the cable conductors are damaged.

Therefore, those skilled in the art have endeavored to develop a submarine cable conductor and a method for manufacturing the same, which can prevent water from being blocked by the conductor itself when the insulation layer leaks, and reduce the maintenance cost.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention provides a submarine cable conductor and a manufacturing method thereof, which can prevent water from leaking from the conductor when the insulation layer is leaked, thereby reducing the maintenance cost.

In order to achieve the purpose, the invention provides a submarine cable conductor which comprises a plurality of conductor single wires, wherein special silicon rubber is coated outside the conductor single wires in a saturated mode, the special silicon rubber contains water-blocking powder, and the mass of the water-blocking powder accounts for 3% -10% of that of the special silicon rubber. The water-blocking powder can be rapidly expanded after meeting water, so that all gaps in the cable conductor are filled, and the water seepage is prevented from further damaging the cable.

Furthermore, the special silicon rubber also comprises silicone oil, carbon black and silicon rubber. The carbon black has large surface area, is beneficial to adsorbing volatile water and further reduces water seepage.

Further, the mass of the silicone oil accounts for 1-3% of the mass of the special silicone rubber, and the mass of the carbon black accounts for 1-3% of the mass of the special silicone rubber.

The invention also provides a manufacturing method of the submarine cable conductor, which comprises the following steps:

1) the silicone oil, the powdered carbon black, the powdered silicon rubber and the water-blocking powder are mixed in proportion to form the viscous special silicon rubber, and the viscous special silicon rubber is convenient to coat.

2) The surface of each conductor single wire is coated with the special silicon rubber in a saturated mode;

3) and stranding a plurality of conductor single wires coated with the special silicon rubber to form a conductor.

The invention has the beneficial effects that: according to the invention, special silicon rubber is coated outside each conductor single line in a saturated manner, and the water-blocking powder absorbs, seeps and expands when seepage occurs, so that further seepage of water is prevented; the single-wire conductors are not in contact with each other, and the normal work of other single-wire conductors is not influenced when a part of conductors are in short circuit or emergency; the conductor is formed by twisting a plurality of conductors, has certain flexibility, and can normally work when being bent and wound.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein the terms "upper", "lower", "left", "right", "inner", "outer", and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular manner, and thus should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "in communication" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the submarine cable conductor comprises a plurality of conductor single wires 2, the conductor single wires 2 are made of copper or aluminum alloy, the conductor single wires 2 are coated with special silicon rubber 3 in a saturated mode, the special silicon rubber 3 contains water-blocking powder, the mass of the water-blocking powder accounts for 3% -10% of the mass of the special silicon rubber 3, the water-blocking powder expands rapidly after absorbing water, the volume of the expansion is about twenty times of the initial volume, gaps among the conductor single wires 2 are filled rapidly, and further water permeation is prevented.

The special silicon rubber 3 also comprises silicon oil, carbon black and silicon rubber, wherein the mass of the silicon oil accounts for 1% -3% of the mass of the special silicon rubber 3, and the silicon oil is used for modulating the powdery carbon black and the powdery silicon rubber to form a sticky state, so that the special silicon rubber is convenient to coat. The mass of the carbon black accounts for 1-3% of the mass of the special silicon rubber 3, and loose and light powdered carbon black can also absorb water seepage so as to further protect the cable conductor 1.

The invention also provides a method for manufacturing the submarine cable conductor, which comprises three embodiments, wherein the method comprises the following steps:

1) the silicone oil, the powdered carbon black, the powdered silicon rubber and the water-blocking powder are mixed in proportion to form the viscous special silicon rubber 3.

The special silicon rubber comprises the following raw material components in percentage by weight:

watch 1

In the embodiments 1 to 3, the diameters of the carbon black and the silicone rubber are both 10 micrometers to 100 micrometers, the carbon black, the silicone rubber, the water-blocking powder and the silicone oil are mixed according to a certain proportion and then stirred uniformly, the stirring time is 1 hour, 0.45 hour and 0.5 hour respectively, and finally the viscous special silicone rubber 3 is formed.

2) Before twisting, the surface of each conductor single wire 2 is coated with the special silicon rubber 3 in a saturated mode through a hairbrush, when the conductor single wires 2 are different, a proper amount of silicon oil or carbon black can be added in the coating process, and the special silicon rubber 3 is coated on the surface of each conductor single wire 2 as much as possible.

3) A plurality of conductor single wires 2 coated with special silicon rubber 3 are stranded to form a conductor 1, the conductor single wires 2 are stranded by a frame stranding machine, gaps among the monomer single wires 2 can be filled in the stranding process due to the fact that the special silicon rubber 3 is sticky, a layer of special silicon rubber 3 can be further coated on the outer surface of the conductor 1 formed by stranding, and the conductor single wires 2 are prevented from being exposed due to scraping in the stranding process.

The submarine cable conductor manufactured according to the embodiment is detected in the following way in terms of water resistance:

and (3) scratching an insulating layer of the cable, wherein the length of the scratched insulating layer is 1cm, then putting the experimental cable into a sealed container, extending two ends of the cable out of the sealed container by 10cm, adding seawater into the sealed container, pressurizing, and detecting whether water seepage exists at two ends of the cable by using a water testing paste after pressurizing for ten hours.

Through experimental detection, in the examples 1 to 3 in the table I, the sealed containers are respectively pressurized to 1.1MPa, 1.4MPa and 1.2MPa, and after ten hours, no water seepage occurs at both ends of the cable. Therefore, the conductors of the submarine cables of examples 1 to 3 all meet the requirements.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A submarine cable conductor, characterized by: the waterproof single wire comprises a plurality of conductor single wires (2), wherein special silicon rubber (3) is coated outside the conductor single wires (2) in a saturated mode, water-blocking powder is contained in the special silicon rubber (3), and the mass of the water-blocking powder accounts for 3% -10% of that of the special silicon rubber (3).

2. A submarine cable conductor according to claim 1, wherein: the special silicon rubber (3) also comprises silicon oil, carbon black and silicon rubber.

3. A submarine cable conductor according to claim 2, wherein: the mass of the silicone oil accounts for 1-3% of that of the special silicone rubber (3);

the mass of the carbon black accounts for 1-3% of the mass of the special silicon rubber (3).

4. A method of manufacturing a submarine cable conductor according to claim 1, 2 or 3, comprising the steps of:

1) mixing silicone oil, powdered carbon black, powdered silicon rubber and water-blocking powder in proportion to form the viscous special silicon rubber (3);

2) the surface of each conductor single wire (2) is coated with the special silicon rubber (3) in a saturated mode;

3) and stranding a plurality of conductor single wires (2) coated with the special silicon rubber (3) to form a conductor (1).