Corrosion-resistant low-voltage power cable

Abstract

The utility model discloses a corrosion-resistant low-voltage power cable which comprises a cable core, the outer wall of the cable core is coated with a shielding layer, the outer wall of the shielding layer is coated with a heat insulation layer, the outer wall of the heat insulation layer is coated with a corrosion-resistant layer, the outer wall of the corrosion-resistant layer is coated with a waterproof layer, the outer wall of the waterproof layer is coated with a fireproof layer, and the outer wall of the fireproof layer is coated with a fireproof layer. The outer wall of the fireproof layer is coated with an armored reinforcing layer, the outer wall of the armored reinforcing layer is extruded with an outer sheath, the cable core is composed of four wire cores and a filling layer, the wire cores are annularly distributed at equal intervals, the filling layer is arranged between the wire cores and the shielding layer, each wire core is composed of a conductor and an insulating layer, the insulating layer is coated on the outer wall of the conductor, and the outer sheath is extruded on the outer wall of the armored reinforcing layer. The shielding layer is formed by weaving copper wires, and the armored reinforcing layer is formed by weaving aramid fibers. The corrosion-resistant low-voltage power cable can keep the structural integrity and the electrical performance stability when facing some common corrosive environments, and has excellent weather resistance and corrosion resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage power cables, in particular to a corrosion-resistant low-voltage power cable. Background Art

[0002] Power cable is a cable used to transmit and distribute electric energy. Its basic structure consists of four parts: core, insulation layer, shielding layer and protective layer. The core is the conductive part of the power cable, which is used to transmit electric energy and is the main part of the power cable. The insulation layer is used to electrically isolate the core from the ground and the cores of different phases from each other to ensure the transmission of electric energy. It is an indispensable component of the power cable structure. The shielding layer is generally present in power cables of 15kV and above, including the conductor shielding layer and the insulation shielding layer. The protective layer protects the power cable from the intrusion of external impurities and moisture, and prevents direct damage to the power cable by external forces.

[0003] The existing Chinese patent with announcement number CN206021971U discloses a low-voltage power cable. The low-voltage power cable includes a protective layer, a moisture-proof layer, a double-layer steel belt layer, a core layer and a reinforcing core from the outside to the inside. The core layer includes four insulating sleeves arranged along the inner circumference of the double-layer steel belt layer and a plurality of cores arranged in the insulating sleeve. Each insulating sleeve is a fan-shaped structure, and the long arc side and the short arc side of the fan-shaped structure are both protruding outward, the short arc side of the insulating sleeve is in contact with the outer circumference of the reinforcing core, and the gap between the insulating sleeve and the reinforcing core is filled with filler.

[0004] Although the power cable in the above scheme has a simple structure and is easy to manufacture, the corrosion resistance of the low-voltage power cable is not ideal. Corrosion will accelerate the aging process of the cable, reduce the mechanical strength and flexibility of the cable, and easily cause cracking and breakage, shortening the service life of the cable and increasing the cost of maintenance and replacement. Therefore, it does not meet the existing needs. In this regard, we propose a corrosion-resistant low-voltage power cable. Utility Model Content

[0005] The utility model aims to provide a corrosion-resistant low-voltage power cable to solve the problem that the corrosion resistance of the low-voltage power cable mentioned in the above background technology is not ideal.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a corrosion-resistant low-voltage power cable, comprising a cable core, the outer wall of the cable core is coated with a shielding layer, the outer wall of the shielding layer is coated with a heat insulation layer, the outer wall of the heat insulation layer is coated with a corrosion-resistant layer, the outer wall of the corrosion-resistant layer is coated with a waterproof layer, the outer wall of the waterproof layer is coated with a fireproof layer, the outer wall of the fireproof layer is coated with an armor reinforcement layer, and the outer wall of the armor reinforcement layer is extruded with an outer sheath.

[0007] Preferably, the cable core consists of a wire core and a filling layer, four wire cores are arranged in a ring shape and are equidistantly distributed, and the filling layer is arranged between the wire core and the shielding layer.

[0008] Preferably, the wire core consists of a conductor and an insulating layer, and the insulating layer is coated on the outer wall of the conductor.

[0009] Preferably, the shielding layer is woven from copper wires.

[0010] Preferably, the armor reinforcement layer is woven from aramid fibers.

[0011] Preferably, the outer sheath is an EPDM outer sheath.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides an anti-corrosion layer on the outside of the cable core, and the anti-corrosion layer is made of polyvinyl chloride. As a widely used insulating material, polyvinyl chloride not only has good electrical insulation performance, but also exhibits certain corrosion resistance. Its stable chemical properties enable the cable to maintain structural integrity and stable electrical performance when facing some common corrosive environments, and a heat insulation layer is provided on the inner side of the anti-corrosion layer. The heat insulation layer is ceramic fiber. As a high-performance thermal insulation material, ceramic fiber has excellent high temperature resistance and heat insulation performance, and can effectively prevent heat from being conducted to the inside of the cable, thereby reducing the temperature of the cable during operation and improving the high temperature resistance and service life of the cable.

[0014] 2. The utility model provides a waterproof layer on the outside of the waterproof layer, and a fireproof layer on the outside of the waterproof layer. The waterproof layer is made of polyurethane material, which has excellent waterproof performance and can effectively prevent moisture from penetrating into the inside of the cable, thereby protecting the insulation layer, conductor and other internal components of the cable from moisture erosion. The fireproof layer is made of flame-retardant polyvinyl chloride material, which not only inherits the electrical insulation performance and corrosion resistance of ordinary polyvinyl chloride, but also has flame-retardant properties. Flame-retardant polyvinyl chloride can quickly form a carbonized layer when encountering fire to prevent the spread of flames, thereby effectively protecting the cable from the threat of fire. Through the design of this double-layer protection structure, it not only has excellent waterproof performance and can work stably in a humid environment, but also has good fireproof performance, which can effectively slow down the spread of fire when a fire occurs, providing a more reliable guarantee for the safe use of cables.

[0015] 3. The utility model is provided with a shielding layer on the outside of the cable core, and an armor reinforcement layer on the outside of the fireproof layer. The shielding layer is woven with a copper wire mesh. As an excellent conductive material, copper wire can effectively absorb and shield external electromagnetic interference signals, ensuring the stability and accuracy of signal transmission inside the cable. At the same time, the structure of the copper wire mesh also has a certain mechanical strength, which can enhance the overall strength of the cable to a certain extent, and improve the mechanical properties of the cable such as compression and tension. The armor reinforcement layer is woven with aramid fiber. Aramid fiber is a high-performance synthetic fiber with extremely high strength and modulus, as well as excellent heat resistance and corrosion resistance. The armor reinforcement layer woven with aramid fiber can significantly improve the overall strength of the cable, enhance the compression, tension, impact resistance and other capabilities of the cable, and enable the cable to maintain a stable working state in a complex environment. The shielding layer woven with the copper wire mesh and the armor reinforcement layer woven with the aramid fiber are arranged, which not only improves the electromagnetic shielding effect of the cable, but also significantly enhances the overall strength of the cable, so that the cable shows better performance in transmitting signals and bearing mechanical loads.

[0016] 4. The utility model provides an outer sheath on the outside of the armor reinforcement layer, and the outer sheath is an EPDM outer sheath. EPDM is used as the outer sheath material. EPDM has excellent weather resistance, can operate stably for a long time under various climatic conditions, and is not easy to age or crack. Secondly, EPDM has good corrosion resistance to chemical substances such as acids, alkalis, and salts, and can effectively resist chemical corrosion that the cable may encounter during use. EPDM also has certain mechanical strength and flexibility, and can provide certain compression and tensile resistance while protecting the cable, providing excellent weather resistance and corrosion resistance for low-voltage power cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a top view schematic diagram of the internal structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the armor reinforcement layer structure of the utility model;

[0020] Figure 4 For the utility model Figure 2 A partial enlarged view of area A.

[0021] In the figure: 1. Conductor; 2. Insulation layer; 3. Wire core; 4. Filling layer; 5. Cable core; 6. Shielding layer; 7. Thermal insulation layer; 8. Corrosion-resistant layer; 9. Waterproof layer; 10. Fireproof layer; 11. Armor reinforcement layer; 12. Outer sheath. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides a technical solution: a corrosion-resistant low-voltage power cable, comprising a cable core 5, the outer wall of the cable core 5 is coated with a shielding layer 6, the outer wall of the shielding layer 6 is coated with a heat insulation layer 7, the outer wall of the heat insulation layer 7 is coated with a corrosion-resistant layer 8, the outer wall of the corrosion-resistant layer 8 is coated with a waterproof layer 9, the outer wall of the waterproof layer 9 is coated with a fireproof layer 10, the outer wall of the fireproof layer 10 is coated with an armor reinforcement layer 11, and the outer wall of the armor reinforcement layer 11 is extruded with an outer sheath 12.

[0024] When in use, polyvinyl chloride is used as the corrosion-resistant layer 8 to ensure the structural integrity and electrical stability of the cable in a corrosive environment. The added insulation layer 7 uses ceramic fiber to effectively reduce the operating temperature of the cable and improve its high temperature resistance. The shielding layer 6 composed of a copper wire mesh and the armor reinforcement layer 11 woven with aramid fibers not only enhances the electromagnetic shielding effect of the cable, but also significantly improves its overall strength. The EPDM rubber outer sheath 12 provides the cable with excellent weather resistance and corrosion resistance, ensuring the long-term stable operation of the cable in various complex environments. The low-voltage power cable performs well in electrical insulation, corrosion resistance, high temperature resistance, mechanical strength and weather resistance.

[0025] See also Figure 1 and Figure 2 The cable core 5 is composed of a core 3 and a filling layer 4. The core 3 is arranged in a ring shape and is equidistantly distributed. The filling layer 4 is arranged between the core 3 and the shielding layer 6. The filling layer 4 is made of polypropylene rope, which has excellent wear resistance and tensile strength. It can effectively prevent the relative displacement and friction between the cores 3 and maintain the stability of the cable structure. The polypropylene rope also has good insulation performance, which can further enhance the electrical safety of the cable.

[0026] See also Figure 1 and Figure 2The wire core 3 is composed of a conductor 1 and an insulating layer 2, and the insulating layer 2 is coated on the outer wall of the conductor 1. The insulating layer 2 is made of irradiated cross-linked polyethylene material. The irradiated cross-linked polyethylene is irradiated to form a cross-linked structure between its molecular chains, thereby significantly improving the mechanical strength and wear resistance of the material. This enhanced mechanical strength can protect the conductor 1 from external physical damage, such as extrusion, stretching, etc. The irradiated cross-linked polyethylene also has excellent electrical properties. Its high insulation resistance can effectively prevent current leakage and ensure the electrical safety of the cable. In addition, it also has a low dielectric constant and dielectric loss, which can reduce the energy loss of the cable in the process of transmitting electric energy and improve the transmission efficiency. The irradiated cross-linked polyethylene has good heat resistance and aging resistance. In a high temperature environment, its performance is stable and it is not easy to deform or age, which ensures the reliable operation of the cable in a high temperature environment. At the same time, it can also resist chemical corrosion and oxidation and extend the service life of the cable.

[0027] See also Figure 1 and Figure 4 The shielding layer 6 is woven from copper wires. Copper, as an excellent conductive material, can effectively absorb and shield external electromagnetic interference signals, thereby improving the stability and accuracy of signal transmission inside the cable. This shielding effect is essential for ensuring the normal operation of the cable in a complex electromagnetic environment. The structure of the copper wire braided mesh has a certain mechanical strength, which can enhance the overall strength of the cable to a certain extent and improve the mechanical properties of the cable such as compression and tension. This structural characteristic makes the cable not easily damaged when subjected to external forces, thereby ensuring the durability and reliability of the cable.

[0028] See also Figure 1 , Figure 3 and Figure 4 The armor reinforcement layer 11 is woven from aramid fiber. Aramid fiber, as a high-performance synthetic fiber, has extremely high strength and modulus, so that the armor reinforcement layer can significantly improve the overall mechanical strength of the cable and enhance the cable's compression, tension, impact resistance and other capabilities;

[0029] See also Figure 1 , Figure 2 and Figure 4 The outer sheath 12 is an EPDM outer sheath, which has excellent weather resistance. Whether in the cold winter or the hot summer, the EPDM can maintain stable performance and is not easy to age, crack or harden, ensuring that the cable can operate safely and reliably under various climatic conditions.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A corrosion-resistant low-voltage power cable, comprising a cable core (5), characterized in that: The outer wall of the cable core (5) is coated with a shielding layer (6), the outer wall of the shielding layer (6) is coated with a heat insulation layer (7), the outer wall of the heat insulation layer (7) is coated with a corrosion-resistant layer (8), the outer wall of the corrosion-resistant layer (8) is coated with a waterproof layer (9), the outer wall of the waterproof layer (9) is coated with a fireproof layer (10), the outer wall of the fireproof layer (10) is coated with an armor reinforcement layer (11), and the outer wall of the armor reinforcement layer (11) is extruded with an outer sheath (12).

2. A corrosion-resistant low-voltage power cable according to claim 1, characterized in that: The cable core (5) is composed of a wire core (3) and a filling layer (4); four wire cores (3) are arranged in an annular shape and are equidistantly distributed; and the filling layer (4) is arranged between the wire core (3) and the shielding layer (6).

3. A corrosion-resistant low-voltage power cable according to claim 2, characterized in that: The wire core (3) is composed of a conductor (1) and an insulating layer (2), and the insulating layer (2) is coated on the outer wall of the conductor (1).

4. A corrosion-resistant low-voltage power cable according to claim 1, characterized in that: The shielding layer (6) is woven from copper wires.

5. A corrosion-resistant low-voltage power cable according to claim 1, characterized in that: The armor reinforcement layer (11) is woven from aramid fibers.

6. A corrosion-resistant low-voltage power cable according to claim 1, characterized in that: The outer sheath (12) is an ethylene propylene rubber outer sheath.

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