Polypropylene insulated high-resistance water structure high-voltage cable

Abstract

The application belongs to the technical field of high-voltage cables, and discloses a polypropylene insulation high-water-resistance structure high-voltage cable, which comprises a plurality of wires, a plurality of support members are arranged among the wires, an insulation layer is arranged on the outer wall of each wire, the insulation layer is made of polypropylene material, a water-resistance belt is arranged on the outer wall of each wire, a protective pad layer is arranged on the outer wall of the water-resistance belt, a protective layer is arranged on the outer wall of the protective pad layer, an outer protective sleeve is arranged on the outer wall of the protective layer, the wire is a wire twisted by a plurality of copper wires, and the water-resistance belt is a water-resistance belt composed of polyester fiber and high-water-absorption material. The application has the effect of improving the practicability of the device.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage cable technology, and in particular to a high-voltage cable with polypropylene insulation and high water resistance structure. Background Technology

[0002] Power cables are cables used for transmitting and distributing electrical energy. They are commonly used in urban underground power grids, power plant lead-out lines, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. The proportion of cables in power lines is gradually increasing. High-voltage power cables are cable products used in the main lines of power systems to transmit and distribute high-power electrical energy, including power cables of various voltage levels from 66-500kV and various types of insulation.

[0003] When power cables are used, water-blocking strips are installed inside the cables when they are laid underwater to prevent water from entering the cables. In the existing technology, water-blocking of cables is usually achieved by water-blocking grease. However, when the cables are installed longitudinally, the grease will sink downwards due to gravity, resulting in uneven water-blocking effect inside the cables and reducing the practicality of the device. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a high-voltage cable with polypropylene insulation and a high water resistance structure.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a high-voltage cable with polypropylene insulation and high water resistance, comprising multiple conductors, with a support member provided between the multiple conductors, an insulation layer sleeved on the outer wall of each of the multiple conductors, the insulation layer being made of polypropylene, a water-blocking strip being installed on the outer wall of the multiple conductors, a protective layer sleeved on the outer wall of the water-blocking strip, a protective layer sleeved on the outer wall of the protective layer, and an outer sheath sleeved on the outer wall of the protective layer, the conductors being conductors made of multiple copper wires twisted together, and the water-blocking strip being a water-blocking strip made of polyester fiber and a highly absorbent material composite.

[0006] By adopting the above technical solution, when the cable is in use, the insulation layer insulates between multiple conductors. When water enters the cable and comes into contact with the water-blocking strip, the super absorbent material absorbs the water and expands rapidly, increasing its volume many times over. The expanded water-blocking strip becomes a gel, filling the gaps inside the cable. The gel forms a wall, and through its expansion pressure and gel stability, it effectively prevents water from spreading longitudinally along the cable. During use, the water-blocking strip will not cause internal water material to deposit due to gravity, ensuring a uniform water-blocking effect throughout the cable, thereby improving the practicality of the device.

[0007] Furthermore, a filler layer is provided between the water-blocking strip and the wire. The filler layer is made of neoprene rubber. The filler layer, the support, the wire, and the water-blocking strip are produced by wrapping.

[0008] By adopting the above technical solution, the neoprene rubber filler layer utilizes the elasticity and plasticity of rubber to fill the gaps or openings inside the cable, forming a continuous water-blocking barrier that prevents water flow and penetration. This reduces the probability of water seeping into the cable, further improving the cable's waterproof performance and thus enhancing the device's practicality. Furthermore, the neoprene rubber filler layer possesses excellent corrosion resistance and aging resistance, thereby extending the device's service life.

[0009] Furthermore, the protective layer includes a water-blocking layer sleeved on the outer wall of the padding layer and a steel strip sleeved on the outer wall of the water-blocking layer. The water-blocking layer is made of water-blocking powder sandwiched between two layers of non-woven fabric.

[0010] By adopting the above technical solution, when the water-blocking layer encounters moisture, the water-blocking powder will quickly absorb water and expand, forming a gel-like substance, thereby preventing water from entering the cable and further improving the cable's water-blocking effect. The steel strip provides mechanical protection, enhancing the structure's compressive and tensile strength, and preventing external objects from damaging the cable's internal structure. Furthermore, the steel strip also shields against electromagnetic interference, thus improving the device's practicality.

[0011] Furthermore, two symmetrical connectors are fixedly installed on the outer wall of the protective layer, and tensile wires are installed inside the connectors.

[0012] Furthermore, the tensile wire is made of glass fiber.

[0013] By adopting the above technical solution, the tensile wire made of glass fiber improves the tensile strength of the cable, thereby reducing the probability of the cable breaking when it encounters external force underwater, and thus extending the service life of the cable.

[0014] Furthermore, the outer sheath is made of extruded aluminum, and the connector is also made of extruded aluminum; the outer sheath and the connector are integrally formed.

[0015] By adopting the above technical solution, the aluminum outer sheath can effectively protect the cable from mechanical damage caused by the external environment, thus protecting the cable. Furthermore, the aluminum outer sheath has good corrosion resistance and electromagnetic shielding effect, thereby improving the practicality of the device. The integrated molding design of the outer sheath and connectors further enhances the cable's strength.

[0016] Furthermore, both the outer sheath and the connector are coated with an asphalt coating.

[0017] By adopting the above technical solution, the asphalt coating can effectively block water vapor penetration and prevent moisture from entering the cable, thereby further improving the water-blocking effect of the cable.

[0018] Furthermore, the protective layer is made of silicone rubber.

[0019] By adopting the above technical solution, silicone rubber has a certain water resistance, which improves its effectiveness when used underwater and thus enhances the practicality of the device.

[0020] In summary, this utility model has the following beneficial effects:

[0021] 1. In this application, when the cable is in use, the insulation layer insulates the multiple conductors. When water enters the cable and comes into contact with the water-blocking strip, the super absorbent material absorbs the water and expands rapidly, increasing its volume many times. The expanded water-blocking strip becomes a gel, filling the gaps inside the cable. The gel forms a wall, and through its expansion pressure and gel stability, it effectively prevents water from spreading longitudinally along the cable. When the water-blocking strip is in use, the internal water material will not be deposited due to gravity, ensuring that the overall water-blocking effect of the cable is uniform, thereby improving the practicality of the device.

[0022] 2. In this application, the neoprene rubber filler layer utilizes the elasticity and plasticity of rubber to fill the gaps or openings inside the cable, forming a continuous water-blocking barrier that prevents water flow and penetration, thereby reducing the probability of water seeping into the cable and further improving the cable's waterproof performance, thus enhancing the practicality of the device. Furthermore, the neoprene rubber filler layer possesses excellent corrosion resistance and aging resistance, thereby extending the service life of the device.

[0023] 3. In this application, when the water-blocking layer encounters moisture, the water-blocking powder rapidly absorbs water and expands, forming a gel-like substance, thereby preventing water from entering the cable and further improving the cable's water-blocking effect. The steel strip provides mechanical protection, enhancing the structure's compressive and tensile strength, and preventing external objects from damaging the cable's internal structure. Furthermore, the steel strip also shields against electromagnetic interference, thus improving the device's practicality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the protective layer in an embodiment of this utility model.

[0026] In the diagram: 1. Conductor; 11. Support; 2. Insulation layer; 3. Water-blocking tape; 4. Pad layer; 5. Protective layer; 51. Water-blocking layer; 52. Steel strip; 6. Outer sheath; 7. Filler layer; 8. Connector; 9. Tensile wire. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] like Figure 1-2 As shown in the embodiment of this application, a high-voltage cable with polypropylene insulation and a high water-blocking structure is disclosed, including conductors 1, support members 11, insulation layers 2, water-blocking tape 3, sheathing layers 4, protective layers 5, outer sheath 6, filling layers 7, connectors 8, and tensile wires 9. Multiple conductors 1 are provided, each conductor 1 being a strand of copper wire. The support members 11 are disposed between the multiple conductors 1 to support the cable's internal structure. Multiple insulation layers 2 are provided and respectively fitted onto the outer walls of the multiple conductors 1; the insulation layers 2 are made of polypropylene. The water-blocking tape 3 is installed on the outer walls of the multiple conductors 1; the water-blocking tape 3 is a composite of polyester fiber and highly absorbent material. The sheathing layer 4 is fitted onto the outer wall of the water-blocking tape 3, the protective layer 5 is fitted onto the outer wall of the sheathing layer 4, and the outer sheath 6 is fitted onto the outer wall of the protective layer 5.

[0029] When the cable is in use, the insulation layer 2 insulates the multiple conductors 1. When water enters the cable and comes into contact with the water-blocking strip 3, the highly absorbent material absorbs the water and expands rapidly, increasing its volume many times over. The expanded water-blocking strip 3 becomes a gel, filling the gaps inside the cable. The gel forms a wall, and through its expansion pressure and gel stability, it effectively prevents water from spreading longitudinally along the cable. During use, the water-blocking strip 3 will not cause internal water material to settle due to gravity, ensuring that the overall water-blocking effect of the cable is uniform, thereby improving the practicality of the device.

[0030] The filler layer 7 is disposed between the water-blocking strip 3 and the wire 1. The filler layer 7 is made of neoprene rubber and is formed by wrapping the filler layer 7, the support 11, the wire 1 and the water-blocking strip 3 together.

[0031] The neoprene rubber filler layer 7 utilizes the elasticity and plasticity of rubber to fill the gaps or openings inside the cable, forming a continuous water-blocking barrier that prevents water flow and penetration. This reduces the probability of water seeping into the cable, further improving its waterproof performance and thus enhancing the practicality of the device. Furthermore, the neoprene rubber filler layer 7 exhibits excellent corrosion resistance and aging resistance, extending the service life of the device.

[0032] The protective layer 5 includes a water-blocking layer 51 and a steel strip 52. The water-blocking layer 51 is fitted onto the outer wall of the padding layer 4. The water-blocking layer 51 is made of two layers of non-woven fabric with water-blocking powder sandwiched between them. The steel strip 52 is fitted onto the outer wall of the water-blocking layer 51.

[0033] When the water-blocking layer 51 encounters moisture, the water-blocking powder rapidly absorbs water and expands, forming a gel-like substance that prevents water from entering the cable, thus further improving the cable's water-blocking effect. The steel strip 52 provides mechanical protection, enhancing the structure's compressive and tensile strength and preventing damage to the cable's internal structure from external objects. Furthermore, the steel strip 52 also shields against electromagnetic interference, thereby improving the device's practicality.

[0034] Two connectors 8 are provided and symmetrically arranged on the outer wall of the protective layer 5. Two tensile wires 9 are provided and respectively installed in the two connectors 8. The tensile wires 9 are made of glass fiber material.

[0035] The fiberglass wire 9 improves the cable's tensile strength, thereby reducing the probability of the cable breaking when it encounters external forces underwater, thus extending the cable's service life.

[0036] To further enhance cable strength, the outer sheath 6 is made of extruded aluminum, and the connector 8 is also made of extruded aluminum. The outer sheath 6 and connector 8 are integrally molded. The aluminum outer sheath 6 effectively protects the cable from mechanical damage caused by the external environment, thus protecting the cable. Furthermore, the aluminum outer sheath 6 possesses excellent corrosion resistance and electromagnetic shielding properties, thereby improving the practicality of the device. The integral molding design of the outer sheath 6 and connector 8 further enhances the cable's strength.

[0037] To further enhance the water-blocking effect of the cable, both the outer sheath 6 and the connector 8 are coated with an asphalt coating. The asphalt coating effectively blocks water vapor penetration and prevents moisture from entering the cable, thereby further improving the cable's water-blocking performance.

[0038] To improve the practicality of the device, the protective layer 4 is made of silicone rubber. Silicone rubber has a certain degree of water resistance, which improves its performance when used underwater, thereby enhancing the practicality of the device.

[0039] The working principle of the polypropylene insulated high water-blocking high-voltage cable in this embodiment is as follows: When the cable is in use, the insulation layer 2 insulates between multiple conductors 1. When water enters the cable and comes into contact with the water-blocking strip 3, the highly absorbent material absorbs the water and expands rapidly, increasing its volume many times over. The expanded water-blocking strip 3 becomes a gel, filling the gaps inside the cable. The gel forms a wall, and through its expansion pressure and gel stability, it effectively prevents water from spreading longitudinally along the cable. During use, the water-blocking strip 3 will not cause internal water material to deposit due to gravity, ensuring that the overall water-blocking effect of the cable is uniform, thereby improving the practicality of the device.

[0040] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A polypropylene insulated high-resistive water-structure high-voltage cable comprising a plurality of conductors (1), characterized in that: A support member (11) is provided between multiple conductors (1). An insulation layer (2) is provided on the outer wall of each conductor (1). The insulation layer (2) is made of polypropylene. A water-blocking tape (3) is installed on the outer wall of the multiple conductors (1). A padding layer (4) is provided on the outer wall of the water-blocking tape (3). A protective layer (5) is provided on the outer wall of the padding layer (4). An outer sheath (6) is provided on the outer wall of the protective layer (5). The conductor (1) is a conductor (1) made of multiple copper wires twisted together. The water-blocking tape (3) is a water-blocking tape (3) made of polyester fiber and highly absorbent material. The protective layer (5) includes a water-blocking layer (51) provided on the outer wall of the padding layer (4) and a steel strip (52) provided on the outer wall of the water-blocking layer (51). The water-blocking layer (51) is made of two layers of non-woven fabric with water-blocking powder sandwiched between them.

2. A polypropylene insulated high-resistive water-structure high voltage cable according to claim 1, characterized in that: A filler layer (7) is provided between the water-blocking strip (3) and the wire (1). The filler layer (7) is made of neoprene rubber. The filler layer (7), the support (11), the wire (1) and the water-blocking strip (3) are produced by wrapping.

3. The high-voltage cable with polypropylene insulation and high water resistance structure according to claim 1, characterized in that: Two symmetrical connectors (8) are fixedly installed on the outer wall of the protective layer (5), and tensile wires (9) are installed inside the connectors (8).

4. The high-voltage cable with polypropylene insulation and high water resistance structure according to claim 3, characterized in that: The tensile wire (9) is made of glass fiber.

5. A high-voltage cable with polypropylene insulation and high water resistance structure according to claim 3, characterized in that: The outer sheath (6) is an aluminum extrusion outer sheath (6), and the connector (8) is an aluminum extrusion connector (8). The outer sheath (6) and the connector (8) are integrally formed.

6. A high-voltage cable with polypropylene insulation and high water resistance structure according to claim 3, characterized in that: Both the outer sheath (6) and the connector (8) are coated with asphalt.

7. A high-voltage cable with polypropylene insulation and high water resistance structure according to claim 1, characterized in that: The protective layer (4) is a protective layer (4) made of silicone rubber.

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