Waterproof insulating layer composite structure of power cable

Abstract

The utility model relates to the technical field of power cables, and discloses a waterproof insulating layer composite structure of a power cable, which comprises a conductor, an insulating layer arranged on the periphery of the conductor, an anti-interference layer arranged on the periphery of the insulating layer, a waterproof layer arranged on the periphery of the anti-interference layer, a flame-retardant layer arranged on the periphery of the waterproof layer, and a waterproof layer arranged on the periphery of the flame-retardant layer. And a shielding layer is arranged at the periphery of the flame-retardant layer. According to the waterproof insulating layer composite structure of the power cable, the insulating layer is made of cross-linked polyethylene, so that the conductor can be effectively isolated from the external environment, electric leakage is prevented, the waterproof insulating layer composite structure has the advantages of high toughness and high impact strength, the anti-interference layer made of aluminum foil has ductility and adapts to cable bending, and a surface oxidation film is resistant to acid and alkali; and the shielding layer made of the copper wire woven mesh has electromagnetic shielding and physical protection functions when being compounded with the anti-interference layer and the insulating layer, so that the service life of the cable is prolonged, and stable operation of a power system is ensured.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, and in particular to a waterproof insulation layer composite structure for power cables. Background Technology

[0002] With the rapid development of the power industry, power cables are being used more and more widely in various scenarios. In complex environments such as humidity, chemical corrosion, and abrasion, higher requirements are placed on the waterproof, insulation, corrosion resistance, and abrasion resistance properties of power cables. Existing composite insulation structures for power cables struggle to simultaneously achieve multiple properties such as waterproofing, insulation, flame retardancy, corrosion resistance, and abrasion resistance, leading to shortened cable lifespan in harsh environments and even safety hazards, affecting the stable operation of the power system. Utility Model Content

[0003] The main objective of this invention is to provide a waterproof composite insulation layer structure for power cables, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a waterproof insulation layer composite structure for power cables, comprising a conductor, an insulation layer disposed around the outer periphery of the conductor, an anti-interference layer disposed around the outer periphery of the insulation layer, a waterproof layer disposed around the outer periphery of the anti-interference layer, a flame-retardant layer disposed around the outer periphery of the waterproof layer, a shielding layer disposed around the outer periphery of the flame-retardant layer, a rubber buffer layer disposed between the flame-retardant layer and the shielding layer, a corrosion-resistant layer disposed around the outer periphery of the shielding layer, a wear-resistant layer disposed around the outer periphery of the corrosion-resistant layer, and protrusions disposed on the outer surface of the wear-resistant layer.

[0005] Preferably, the insulating layer is made of cross-linked polyethylene with a thickness ranging from 0.6 to 1.0 mm.

[0006] Preferably, the anti-interference layer is made of aluminum foil with a thickness ranging from 0.05 to 0.15 mm.

[0007] Preferably, the waterproof layer is made of ethylene propylene rubber material with a thickness ranging from 0.3 to 0.8 mm.

[0008] Preferably, the flame-retardant layer is made of glass fiber cloth and the glass fiber cloth is impregnated with an organic flame retardant, and its thickness ranges from 0.2 to 0.5 mm.

[0009] Preferably, the shielding layer is made of copper wire mesh with a thickness ranging from 0.1 to 0.2 mm.

[0010] Preferably, the corrosion-resistant layer is made of polytetrafluoroethylene and has a thickness ranging from 0.1 to 0.3 mm.

[0011] Preferably, the wear-resistant layer is made of polyurethane and has a thickness ranging from 0.2 to 0.5 mm.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the cross-linked polyethylene insulation layer can effectively isolate the conductor from the external environment, prevent leakage, and has the advantages of high toughness and high impact strength; the aluminum foil anti-interference layer has ductility to adapt to cable bending, and the surface oxide film is resistant to acids and alkalis. Combined with the outer covering layer, it can adapt to complex environments such as high temperature and humidity, and extend the service life of the cable; when the copper wire braided mesh shielding layer is combined with the anti-interference layer and the insulation layer, it has both electromagnetic shielding and physical protection functions, extending the service life of the cable and ensuring the stable operation of the power system. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a waterproof insulation layer composite structure for a power cable according to the present invention.

[0014] In the diagram: 1. Conductor; 2. Insulation layer; 3. Anti-interference layer; 4. Waterproof layer; 5. Flame retardant layer; 6. Shielding layer; 7. Corrosion resistant layer; 8. Wear resistant layer. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] like Figure 1 As shown, a waterproof insulation composite structure for a power cable includes a conductor 1, an insulation layer 2 around the conductor 1, an anti-interference layer 3 around the insulation layer 2, a waterproof layer 4 around the anti-interference layer 3, a flame-retardant layer 5 around the waterproof layer 4, a shielding layer 6 around the flame-retardant layer 5, a rubber buffer layer between the flame-retardant layer 5 and the shielding layer 6, a corrosion-resistant layer 7 around the shielding layer 6, and a wear-resistant layer 8 around the corrosion-resistant layer 7. The wear-resistant layer 8 has raised surfaces on its outer surface. In summary, the cross-linked polyethylene insulation layer 2 effectively isolates the conductor 1 from the external environment, preventing leakage and possessing high toughness and impact resistance. The aluminum foil anti-interference layer 3 is ductile enough to adapt to cable bending, and its surface oxide film is acid and alkali resistant. Combined with the outer covering, it can adapt to complex environments such as high temperature and humidity, extending the cable's service life. The copper wire braided mesh shielding layer 6, when combined with the anti-interference layer 3 and the insulation layer 2, provides both electromagnetic shielding and physical protection functions, extending the cable's service life and ensuring the stable operation of the power system.

[0017] The insulation layer 2 is made of cross-linked polyethylene with a thickness ranging from 0.6 to 1.0 mm. It can effectively isolate the conductor 1 from the external environment, prevent leakage, reduce energy loss during power transmission, withstand partial discharge for a long time, and has the advantages of high toughness and high impact strength. It can be bent for easy installation and can withstand mechanical stress during installation and use, thus extending the service life of the cable.

[0018] The anti-interference layer 3 is made of aluminum foil with a thickness ranging from 0.05 to 0.15 mm. The aluminum foil anti-interference layer 3 is ductile and adaptable to cable bending. The surface oxide film is resistant to acids and alkalis. Together with the outer covering layer, it can adapt to complex environments such as high temperature and humidity, and extend the service life of the cable.

[0019] The waterproof layer 4 is made of ethylene propylene rubber with a thickness ranging from 0.3 to 0.8 mm. The waterproof layer made of ethylene propylene rubber can resist water penetration for a long time, ensure the insulation performance of the cable, and can bend and deform with the cable without breaking. It forms a double insulation barrier with the cross-linked polyethylene insulation layer 2, and also has flame retardancy.

[0020] The flame-retardant layer 5 is made of fiberglass cloth and is impregnated with organic flame retardant. Its thickness ranges from 0.2 to 0.5 mm. When the fiberglass cloth impregnated with organic flame retardant is exposed to fire, the flame-retardant layer 5 quickly forms a dense char layer, which prevents the spread of flames. With the help of organic flame retardant, it can maintain structural stability for a long time in an environment of 150°C. It also has flexibility and can adapt to complex curved surfaces.

[0021] The shielding layer 6 is made of copper wire braided mesh with a thickness ranging from 0.1 to 0.2 mm. When combined with the anti-interference layer 3 and the insulation layer 2, it has both electromagnetic shielding and physical protection functions, extending the service life of the cable.

[0022] The corrosion-resistant layer 7 is made of polytetrafluoroethylene, with a thickness ranging from 0.1 to 0.3 mm. It has the advantages of being resistant to strong acids, strong alkalis and organic solvents, and being chemically stable.

[0023] The wear-resistant layer 8 is made of polyurethane with a thickness ranging from 0.2 to 0.5 mm. It has the advantages of being oil-resistant, solvent-resistant, and resistant to most acid and alkali corrosion, and has outstanding cushioning and shock absorption capabilities.

[0024] Working principle:

[0025] The cross-linked polyethylene insulation layer 2 effectively isolates the conductor 1 from the external environment, preventing leakage. It has the advantages of high toughness and high impact strength. The aluminum foil anti-interference layer 3 is ductile and adaptable to cable bending. The surface oxide film is resistant to acids and alkalis. Together with the outer covering, it can adapt to complex environments such as high temperature and humidity, extending the service life of the cable. The copper wire braided mesh shielding layer 6, when combined with the anti-interference layer 3 and the insulation layer 2, has both electromagnetic shielding and physical protection functions, extending the service life of the cable and ensuring the stable operation of the power system.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A waterproof insulation layer composite structure of a power cable, comprising a conductor (1), characterized in that: An insulating layer (2) is provided on the outer periphery of the conductor (1), an anti-interference layer (3) is provided on the outer periphery of the insulating layer (2), a waterproof layer (4) is provided on the outer periphery of the anti-interference layer (3), a flame-retardant layer (5) is provided on the outer periphery of the waterproof layer (4), a shielding layer (6) is provided on the outer periphery of the flame-retardant layer (5), a rubber buffer layer is provided between the flame-retardant layer (5) and the shielding layer (6), a corrosion-resistant layer (7) is provided on the outer periphery of the shielding layer (6), a wear-resistant layer (8) is provided on the outer periphery of the corrosion-resistant layer (7), and a protrusion is provided on the outer surface of the wear-resistant layer (8).

2. A composite structure of a water-resistant insulation layer of a power cable according to claim 1, characterized in that: The insulating layer (2) is made of cross-linked polyethylene with a thickness ranging from 0.6 to 1.0 mm.

3. A composite structure of a water-resistant insulation layer of a power cable according to claim 1, characterized in that: The anti-interference layer (3) is made of aluminum foil with a thickness ranging from 0.05 to 0.15 mm.

4. A composite structure of a water-resistant insulation layer of a power cable according to claim 1, characterized in that: The waterproof layer (4) is made of ethylene propylene rubber material with a thickness ranging from 0.3 to 0.8 mm.

5. A composite structure of a water-resistant insulation layer of a power cable according to claim 1, characterized in that: The flame retardant layer (5) is made of glass fiber cloth and the glass fiber cloth is impregnated with organic flame retardant, and its thickness ranges from 0.2 to 0.5 mm.

6. A composite structure of a water-resistant insulation layer of a power cable according to claim 1, characterized in that: The shielding layer (6) is made of copper wire mesh with a thickness ranging from 0.1 to 0.2 mm.

7. A composite structure of a water-resistant insulation layer of a power cable according to claim 1, characterized in that: The corrosion-resistant layer (7) is made of polytetrafluoroethylene and has a thickness ranging from 0.1 to 0.3 mm.

8. A composite structure of a water-resistant insulation layer of a power cable according to claim 1, characterized in that: The wear-resistant layer (8) is made of polyurethane and has a thickness ranging from 0.2 to 0.5 mm.

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