Highly waterproof torsion-resistant dynamic submarine cable

Abstract

The utility model discloses a highly waterproof torsion-resistant dynamic submarine cable comprising an internal cable core and an external sheath layer, and the cable core comprises at least one power cable; when there are a plurality of power cables, the plurality of power cables are twisted into a cable core. The power cable sequentially comprises a water-blocking conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a first water-blocking layer, a metal shielding layer, a second water-blocking layer and a split-phase sheath from inside to outside. The sheath layer sequentially comprises an inner sheath, a metal armor layer and an outer sheath from inside to outside; a temperature measuring optical fiber and a filling rope are arranged in a gap between the power cable and the sheath layer; the insulating layer is made of 90-DEG C cold-resistant flexible polyvinyl chloride; the cable is provided with the temperature measurement optical fiber, can monitor the temperature of the whole cable at any time, can quickly position a fault when the cable is damaged, and reduces the repair time. The insulating layer is made of 90-DEG C cold-resistant flexible polyvinyl chloride insulating material, and the insulating material has excellent electrical performance, cold resistance, heat resistance, chemical corrosion resistance, mechanical performance and high water resistance.

Description

Technical Field

[0001] The utility model relates to a highly waterproof and torsion-resistant dynamic submarine cable. Background Art

[0002] Dynamic submarine cables are important channels connecting land and sea, and are widely used in communications, energy transmission and other fields. Since dynamic submarine cables are in the marine environment for a long time, facing complex natural conditions and changeable climate factors, they have extremely high requirements for waterproofness, torsion resistance and reliability. However, existing dynamic submarine cables have some technical bottlenecks and shortcomings, such as poor waterproof performance, insufficient torsion resistance, and difficulty in fault location. These problems restrict the development and application of dynamic submarine cable technology. Utility Model Content

[0003] The utility model aims to provide a highly waterproof and torsion-resistant dynamic submarine cable to solve the technical problems mentioned in the above background technology.

[0004] The technical solution for achieving the purpose of the utility model is: a highly waterproof and torsion-resistant dynamic submarine cable, comprising an internal cable core and an external sheath layer, the cable core comprising at least one power cable; when there are multiple power cables, the multiple power cables are twisted into a cable core; the power cable comprises, from the inside to the outside, a water-blocking conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a first water-blocking layer, a metal shielding layer, a second water-blocking layer and a phase-separated sheath; the sheath layer comprises, from the inside to the outside, an inner sheath, a metal armor layer and an outer sheath; a temperature measuring optical fiber and a filling rope are arranged in the gap between the power cable and the sheath layer; the insulating layer adopts 90°C cold-resistant soft polyvinyl chloride.

[0005] Furthermore, the water-blocking conductor is formed by twisting a plurality of single-type copper conductors, and a semi-conductive water-blocking tape or water-blocking glue is wrapped between each layer of copper conductors.

[0006] Furthermore, a temperature measuring optical fiber and a filling rope are provided in the gap between every two adjacent power cables and the sheath layer.

[0007] Furthermore, the metal armor layer is a double-layer metal armor, including an inner first metal armor layer and an outer second metal armor layer, and the twisting directions of the first metal armor layer and the second metal armor layer are opposite.

[0008] Furthermore, the first metal armor layer is made of high-strength galvanized armor steel wire, and the second metal armor layer is made of anti-corrosion armor steel wire.

[0009] Furthermore, the outer sheath layer is made of EPDM rubber.

[0010] By adopting the above technical solution, the utility model has the following beneficial effects:

[0011] (1) The utility model is provided with a temperature measuring optical fiber, which can monitor the temperature of the entire cable at all times. When the cable is damaged, the fault can be quickly located to reduce the repair time; the insulation layer is 90°C cold-resistant soft polyvinyl chloride insulation, and the insulation material has excellent electrical properties, cold resistance, heat resistance, chemical corrosion resistance, mechanical properties, and high water resistance.

[0012] (2) The utility model adopts double layers of different steel wires, and the two layers of steel wires are reversely wrapped to offset the torque stress. The anti-corrosion steel wire has better resistance to seawater erosion. The high-strength galvanized steel wire has high strength and can withstand greater tension and pressure to increase the service life of the cable. The dynamic submarine cable can withstand greater tension, has better corrosion resistance, longer service life, and lower material prices.

[0013] (3) The utility model adopts an EPDM rubber outer sheath, which has good aging resistance, weather resistance, heat resistance, water resistance, UV resistance, chemical resistance and good insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] The numbers in the accompanying drawings are: water-blocking conductor 1, conductor shielding layer 2, insulating layer 3, insulating shielding layer 4, first water-blocking layer 5, metal shielding layer 6, second water-blocking layer 7, phase-separation sheath 8, inner sheath 9, metal armor layer 10, first metal armor layer 10-1, second metal armor layer 10-2, outer sheath 11, temperature measuring optical fiber 12, and filling rope 13. DETAILED DESCRIPTION

[0017] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the embodiments of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0022] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the scope of protection of the utility model.

[0023] (Example 1)

[0024] See Figure 1 The highly waterproof and torsion-resistant dynamic submarine cable of this embodiment includes an internal cable core and an external sheath layer, and the cable core includes at least one power cable; when there are multiple power cables, the multiple power cables are twisted into a cable core; the power cable includes a water-blocking conductor 1, a conductor shielding layer 2, an insulating layer 3, an insulating shielding layer 4, a first water-blocking layer 5, a metal shielding layer 6, a second water-blocking layer 7 and a phase-separation sheath 8 from the inside to the outside; the sheath layer includes an inner sheath 9, a metal armor layer 10 and an outer sheath 11 from the inside to the outside, and a temperature measuring optical fiber 12 and a filling rope 13 are arranged in the gap between the power cable and the sheath layer; the insulating layer 3 adopts 90°C cold-resistant soft polyvinyl chloride.

[0025] Specifically, in this embodiment, there are three power cables, and the three power cables are twisted into a cable core. The water-blocking conductor 1 in each power cable is formed by twisting a plurality of single-type copper conductors, and a semi-conductive water-blocking tape or water-blocking glue is wrapped between each layer of copper conductors; the insulating layer 3 is 90°C cold-resistant soft polyvinyl chloride insulation, and the insulating material has excellent electrical properties, cold resistance, heat resistance, chemical corrosion resistance, mechanical properties, and high water resistance. The metal shielding layer 6 is a copper wire shield wrapped with a layer of soft copper tape for binding. The metal shielding layer 6 is a loosely wound copper wire, and at the same time, a layer of copper tape is wrapped around the copper wire to ensure that it will not be loose, thereby ensuring the electrical connectivity of the power cable, reducing the potential difference between the metal layer and the metal armor layer 10 in the non-interconnected section, and improving the stability of the dynamic submarine cable in the water. Wrap an environmentally friendly rubber-coated cloth tape around the outside of the power cable.

[0026] The cable core is extruded with low-density polyethylene (LDPE) to form an inner sheath 9; the inner sheath 9 is wrapped with a metal armor layer 10, which is a double-layer metal armor, including an inner first metal armor layer 10-1 and an outer second metal armor layer 10-2, and the twisting directions of the first metal armor layer 10-1 and the second metal armor layer 10-2 are opposite. The inner sheath 9 is wrapped with a first metal armor layer 10-1, and the first metal armor layer 10-1 uses high-strength galvanized armored steel wire. The first metal armor layer 10-1 is wrapped with an acrylic wrapping tape, and the second layer is wrapped with anti-corrosion armored steel wire to form the second metal armor layer 10-2. The metal armor layer 10 is wrapped with an acrylic wrapping tape; the acrylic wrapping tape is extruded with EPDM rubber sheathing material to form an outer sheath 11. The metal armor layer 10 has two layers of different steel wires, and the two layers of steel wires are reversely wrapped to offset the torque stress. The anti-corrosion steel wire has better resistance to seawater erosion. The high-strength galvanized steel wire has high strength and can withstand greater tension and pressure, thereby increasing the service life of the cable. The outer sheath 11 is EPDM rubber, which has excellent aging resistance, weather resistance, heat resistance, water resistance, UV resistance, chemical resistance and good insulation performance.

[0027] The filling optical unit in the gap between the power cable and the sheath layer adopts a temperature measuring optical fiber 12, which has the function of constantly monitoring the overall temperature of the cable and providing a quick positioning function in the event of a fault. In order to prevent a single temperature measuring optical fiber 12 from being damaged and unable to perform the monitoring and positioning function, three temperature measuring optical fibers 12 are provided in this embodiment, and a temperature measuring optical fiber 12 is provided in the gap between every two adjacent power cables and the sheath layer. After the temperature measuring optical fiber 12 is filled in the gap between the power cable and the sheath layer, a filling rope 13 is provided in the remaining gaps.

[0028] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly waterproof and torsion-resistant dynamic submarine cable, characterized in that: The invention comprises an inner cable core and an outer sheath layer, wherein the cable core comprises at least one power cable; when there are multiple power cables, the multiple power cables are twisted into a cable core; the power cable comprises, from the inside to the outside, a water-blocking conductor (1), a conductor shielding layer (2), an insulating layer (3), an insulating shielding layer (4), a first water-blocking layer (5), a metal shielding layer (6), a second water-blocking layer (7) and a phase-separation sheath (8); the sheath layer comprises, from the inside to the outside, an inner sheath (9), a metal armor layer (10) and an outer sheath (11); a temperature measuring optical fiber (12) and a filling rope (13) are arranged in the gap between the power cable and the sheath layer; and the insulating layer (3) is made of 90°C cold-resistant soft polyvinyl chloride.

2. A highly waterproof and torsion-resistant dynamic submarine cable according to claim 1, characterized in that: The water-blocking conductor (1) is formed by twisting a plurality of single-type copper conductors, and a semi-conductive water-blocking tape or water-blocking glue is wrapped between each layer of copper conductors.

3. A highly waterproof and torsion-resistant dynamic submarine cable according to claim 1, characterized in that: A temperature measuring optical fiber (12) and a filling rope (13) are arranged in the gap between every two adjacent power cables and the sheath layer.

4. A highly waterproof and torsion-resistant dynamic submarine cable according to claim 1, characterized in that: The metal armor layer (10) is a double-layer metal armor, comprising an inner first metal armor layer (10-1) and an outer second metal armor layer (10-2), wherein the first metal armor layer (10-1) and the second metal armor layer (10-2) have opposite twisting directions.

5. A highly waterproof and torsion-resistant dynamic submarine cable according to claim 4, characterized in that: The first metal armor layer (10-1) is made of high-strength galvanized armor steel wire, and the second metal armor layer (10-2) is made of anti-corrosion armor steel wire.

6. A highly waterproof and torsion-resistant dynamic submarine cable according to claim 1, characterized in that: The outer sheath (11) is made of EPDM rubber.

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