Cable suitable for frozen soil layer and micro-corrosion environment

Abstract

The utility model relates to the technical field, in particular to a cable suitable for a frozen soil layer and a micro-corrosion environment, which comprises a cable core positioned in the center of the cable; the insulating layer wraps the cable core, and the insulating layer is made of a low-temperature-resistant and corrosion-resistant crosslinked polyethylene material; the shielding layer wraps the insulating layer, is formed by weaving aluminum magnesium alloy wires and is used for resisting electromagnetic interference; the shielding layer is coated with the protective layer, and the protective layer is made of a corrosion-resistant and low-temperature-resistant high polymer material; the outer surface of the protective layer is coated with the anti-freezing and anti-corrosion layer; the anti-freezing and anti-corrosion capabilities are strong, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field, particularly to a cable suitable for frozen soil layer and micro-corrosion environment. BACKGROUND

[0002] In today's society, the stability and reliability of power supply are of great importance. Especially in some special geographical areas, such as the frozen soil layer in high latitude areas and the area with micro-corrosion environment, the performance of the cable is required to be extremely harsh.

[0003] When the traditional cable faces the low-temperature environment of the frozen soil layer, its insulation performance will decrease significantly, which can easily cause safety problems such as electric leakage, and seriously affect the stability and safety of power transmission. For example, the ordinary polyethylene insulated cable will appear hard and brittle in the low-temperature environment, which can cause the insulation layer to be easily broken, so that the cable core is exposed to the outside environment and corroded. In the micro-corrosion environment, each structure layer of the cable will be slowly corroded, which can eventually affect the normal work of the cable core. This not only shortens the service life of the cable and increases the maintenance cost, but also can cause the interruption of power supply, which can seriously affect the production and life. SUMMARY

[0004] To solve the above technical problems, the utility model provides a cable suitable for frozen soil layer and micro-corrosion environment, which has strong anti-freezing and anti-corrosion ability and improves the service life.

[0005] The cable suitable for frozen soil layer and micro-corrosion environment comprises:

[0006] a cable core located at the center of the cable;

[0007] an insulation layer coated outside the cable core, which is made of low-temperature-resistant and corrosion-resistant cross-linked polyethylene material;

[0008] a shielding layer coated outside the insulation layer, which is woven by aluminum-magnesium alloy wires and used for resisting electromagnetic interference;

[0009] a protective layer coated outside the shielding layer, which is made of corrosion-resistant and low-temperature-resistant high-molecular material;

[0010] an anti-freezing and anti-corrosion layer coated on the outer surface of the protective layer.

[0011] Further, the cable core comprises a plurality of conductors, each of which is twisted by a plurality of copper wires, and the adjacent two conductors are filled with an insulation filler, which is made of a composite material of ceramic fiber and silicone rubber.

[0012] As an optimization, the surface of the copper wire of the conductor is plated with a tin layer, the thickness of the tin layer is 15 μm to 16 μm, and the pitch of the twisted plurality of copper wires is 17 mm to 18 mm.

[0013] Further, the thickness of the insulation layer is 1mm to 2mm, and a moisture-proof layer is further arranged between the insulation layer and the cable core, and the moisture-proof layer is made of water-absorbing and swelling material.

[0014] Preferably, the high molecular material of the protective layer is a blended material of polytetrafluoroethylene and polyurethane.

[0015] Further, the outer surface of the protective layer is provided with spiral grooves for enhancing the tensile strength and frost heaving resistance of the cable.

[0016] Preferably, the anti-freezing and anti-corrosion layer is made of polyurethane material, and has a thickness of 0.5mm to 1.5mm, and the anti-freezing and anti-corrosion layer is added with anti-freezing agent and anti-corrosion agent, the anti-freezing agent is ethylene glycol or propylene glycol, and the anti-corrosion agent is zinc powder or chromate.

[0017] Further, the surface of the cable is provided with a plurality of warning signs which are spaced apart along the length direction of the cable, the warning signs are made of fluorescent material, and the warning signs are marked with relevant information of the cable, and the relevant information includes cable model, rated voltage and applicable environment.

[0018] The cable is suitable for frozen soil layer and micro-corrosion environment, the cable core is the core, focuses on power transmission, ensures stable power output, the insulation layer is made of low-temperature-resistant and corrosion-resistant cross-linked polyethylene material, maintains stable insulation performance in low-temperature frozen soil layer, resists the adverse effects of cold environment on insulation effect, effectively prevents the corrosion of corrosive substances in the micro-corrosion environment, protects the safety of power transmission, the shielding layer is woven by aluminum-magnesium alloy wire, can efficiently resist electromagnetic interference, greatly improves the signal stability of the cable, avoids the fluctuation or interruption of the signal caused by the influence of external electromagnetic field, makes the power transmission accurate and stable, the protective layer is made of low-temperature-resistant and corrosion-resistant high molecular material, further enhances the overall protection capability of the cable, resists low temperature and blocks various types of corrosion in the micro-corrosion environment, protects the internal structure from being damaged, the outermost anti-freezing and anti-corrosion layer can additionally strengthen the tolerance of the cable in the frozen soil layer and the micro-corrosion environment, reduce the aging and damage risk caused by low temperature and corrosion, prolong the service life of the cable, and ensure that the cable can operate reliably in harsh environment for a long time, and provide solid protection for power supply in the related area. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structure schematic view of a cable suitable for frozen soil layer and micro-corrosion environment at a first angle in the utility model;

[0020] Figure 2 is a structure schematic view of a cable suitable for frozen soil layer and micro-corrosion environment at a second angle in the utility model;

[0021] Figure 3This is a cross-sectional structural diagram of a cable suitable for permafrost and slightly corrosive environments according to this utility model.

[0022] Figure 4 This utility model relates to a cable suitable for use in frozen soil and slightly corrosive environments. Figure 3 Enlarged structural diagram of section A in the middle;

[0023] The following labels are used in the attached diagram: 1. Cable core; 11. Conductor; 12. Insulating filler; 2. Insulation layer; 21. Moisture-proof layer; 3. Shielding layer; 4. Protective layer; 5. Anti-freeze and anti-corrosion layer; 6. Warning sign. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0025] This utility model relates to a cable suitable for permafrost and slightly corrosive environments, such as... Figures 1 to 4 As shown, it includes:

[0026] Cable core 1, located at the center of the cable, is used to transmit electrical energy;

[0027] Insulation layer 2 is wrapped around the outside of cable core 1. Insulation layer 2 is made of cross-linked polyethylene material that is resistant to low temperature and corrosion.

[0028] The shielding layer 3, which covers the outside of the insulation layer 2, is made of aluminum-magnesium alloy wire and is used to resist electromagnetic interference and ensure the stability of the cable signal.

[0029] Protective layer 4 is wrapped around the outside of shielding layer 3. Protective layer 4 is made of a high-molecular material that is corrosion-resistant and low-temperature resistant.

[0030] Antifreeze and anticorrosion layer 5 is coated on the outer surface of protective layer 4;

[0031] The cable core 1 is the core and focuses on power transmission to ensure stable power output. The insulating layer 2 is made of low-temperature-resistant and corrosion-resistant cross-linked polyethylene material, which can maintain stable insulation performance in the low-temperature frozen soil layer and resist the adverse effects of cold environment on insulation effect. At the same time, it can effectively prevent the corrosion of corrosive substances in the micro-corrosion environment and protect the safety of power transmission. The shielding layer 3 is woven by aluminum-magnesium alloy wire and can effectively resist electromagnetic interference, greatly improving the signal stability of the cable. The protection layer 4 is made of corrosion-resistant and low-temperature-resistant high-molecular material, which further enhances the overall protection capability of the cable. It can resist low temperature and block various types of erosion in the micro-corrosion environment to protect the internal structure from damage. The outermost anti-freezing and anti-corrosion layer 5 can additionally strengthen the tolerance of the cable in the frozen soil layer and the micro-corrosion environment, reduce the aging and damage risk caused by low temperature and corrosion, prolong the service life of the cable, and ensure long-term and reliable operation in harsh environments, providing a solid guarantee for power supply in related areas.

[0032] As a preferred solution, as shown in Figures 1 to 4 The cable core 1 includes a plurality of conductors 11, each conductor 11 is twisted by a plurality of copper wires, and an insulating filler 12 is filled between adjacent two conductors 11. The insulating filler 12 is made of a composite material of ceramic fiber and silicone rubber

[0033] The surface of the copper wire of the conductor 11 is plated with a tin layer with a thickness of 15-16 μm, and the pitch of the twisted copper wire is 17-18 mm.

[0034] The plurality of conductors 11 are twisted by a plurality of copper wires, which increases the flexibility of the conductor, facilitates cable laying, and improves the current carrying capacity to ensure efficient power transmission. The insulating filler 12 filled between adjacent conductors 11 is made of a composite material of ceramic fiber and silicone rubber, which can maintain structural stability by the high-temperature-resistant and high-strength properties of ceramic fiber in low-temperature frozen soil layer and micro-corrosion environment, effectively isolate the conductor by the good flexibility and insulation of silicone rubber, prevent short circuit, enhance insulation effect, and improve the electrical performance of the cable by controlling the pitch of the twisted copper wire to 17-18 mm. The cable can ensure stable, efficient and reliable power transmission in harsh environments.

[0035] As a preferred solution, as shown in Figures 1 to 4 The thickness of the insulating layer 2 is 1-2 mm, and a moisture-proof layer 21 is further arranged between the insulating layer 2 and the cable core 1. The moisture-proof layer 21 is made of a water-absorbing and swelling material.

[0036] The thickness of the insulation layer 2 is set to 1-2 mm, which can ensure good insulation performance while avoiding the increase of the overall volume and cost of the cable due to excessive thickness, achieving a balance between performance and economy. The moisture-proof layer 21 between the insulation layer 2 and the cable core 1 is made of a water-absorbing and swelling material. In the frozen soil layer, which may have water vapor and a micro-corrosion environment, the moisture-proof layer 21 can effectively absorb the infiltrated water, swell when encountering water, and form a dense barrier layer to prevent further water intrusion into the cable core 1, preventing the cable core from being damp and causing short circuit, leakage and other problems.

[0037] As a preferred solution, as shown in Figures 1 to 4 The high molecular material of the protective layer 4 is a blend material of polytetrafluoroethylene and polyurethane.

[0038] The protective layer 4 uses a blend material of polytetrafluoroethylene and polyurethane, which combines the advantages of both materials to provide excellent protection for the cable. Polytetrafluoroethylene has a very low friction coefficient, which can effectively reduce the friction loss of the cable during laying and use, reducing the risk of damage to the protective layer caused by friction. Its excellent chemical stability can resist the corrosion of various corrosive media in a micro-corrosion environment, protecting the internal structure. Polyurethane has good flexibility and low-temperature resistance, ensuring that the protective layer 4 maintains good physical properties in the low-temperature environment of the frozen soil layer, and is not prone to brittleness and cracking, maintaining a tight covering of the internal shielding layer 3 and other structures.

[0039] As a preferred solution, as shown in Figures 1 to 4 The outer surface of the protective layer 4 is provided with a spiral groove to enhance the tensile strength and frost heave resistance of the cable.

[0040] In terms of tensile strength, the spiral groove changes the structure of the protective layer, allowing it to more effectively disperse stress when subjected to tension, avoiding stress concentration that can cause the protective layer to break, thereby enhancing the overall tensile strength of the cable and ensuring that the cable is not easily damaged during laying and use, even if it encounters a large tension. In terms of frost heave resistance, in the frozen soil environment, when the temperature changes cause the soil around the cable to freeze and expand, the spiral groove provides a certain buffer space to relieve the extrusion force caused by frost heaving, reducing the risk of damage to the protective layer caused by frost heaving, and also reducing the impact on the internal structure, ensuring that the cable can still work normally under the action of frost heaving, further improving the reliability and durability of the cable in the frozen soil and micro-corrosion environment, prolonging its service life and ensuring the stability of power transmission.

[0041] As a preferred solution, as shown in Figures 1 to 4 The anti-freezing and anti-corrosion layer 5 is made of polyurethane material with a thickness of 0.5-1.5 mm, and the anti-freezing and anti-corrosion layer 5 is added with anti-freezing agent and anti-corrosion agent. The anti-freezing agent is ethylene glycol or propylene glycol, and the anti-corrosion agent is zinc powder or chromate;

[0042] The anti-freezing and anti-corrosion layer 5 is made of polyurethane material, has good flexibility and wear resistance, can effectively resist external physical damage, has a thickness of 0.5mm to 1.5mm, can guarantee the protection effect without excessively increasing the overall volume and weight of the cable, the added anti-freezing agent such as ethylene glycol or propylene glycol can significantly lower the freezing point of the anti-freezing and anti-corrosion layer 5, prevent the coating from being brittle and cracking due to freezing in the low-temperature environment of the frozen soil layer, maintain the integrity and protection performance of the coating, and the addition of the anti-corrosion agent such as zinc powder or chromate can enhance the resistance of the anti-freezing and anti-corrosion layer 5 to various corrosive substances in the micro-corrosion environment, effectively prevent the corrosive medium from penetrating the coating and corroding the internal protection layer 4 and other structures, and greatly improve the anti-freezing and anti-corrosion performance of the cable in the frozen soil layer and the micro-corrosion environment.

[0043] As a preferred solution, as shown in Figure 1 The surface of the cable is provided with a plurality of warning signs 6 distributed along the length direction of the cable, the warning signs 6 are made of fluorescent material, and the warning signs 6 are marked with relevant information of the cable, and the relevant information includes the cable model, the rated voltage, and the applicable environment.

[0044] In the dark or dimly lit construction and maintenance scene, the warning sign 6 made of fluorescent material can automatically emit light, which is clear and eye-catching, and can easily attract the attention of the workers, effectively avoiding accidental damage to the cable due to negligence, and ensuring the safety of the cable. The cable model marked on the sign facilitates the construction personnel to quickly identify the cable specifications, accurately select the matching connection, installation tools and accessories, and improve the work efficiency. The rated voltage information reminds the operator to pay attention to the safety of electricity, prevents the cable from overheating, short circuit and other faults caused by voltage mismatch, and the marking of the applicable environment makes the worker clear that the cable is suitable for the frozen soil layer and the micro-corrosion environment and other conditions, avoids the wrong use in the unsuitable environment, ensures the stable performance of the cable, and prolongs the service life.

[0045] The cable suitable for the frozen soil layer and the micro-corrosion environment of the utility model is installed, connected or arranged in a common mechanical manner, and can be implemented as long as the beneficial effects can be achieved.

[0046] The preferred embodiments of the utility model are described above, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made without departing from the technical principles of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A cable suitable for use in permafrost and micro-corrosive environments, characterized in that, The utility model relates to a kind of cable, including: Cable core (1) is located in the center of cable; Insulating layer (2) is covered outside the cable core (1), and the insulating layer (2) is made of low-temperature-resistant, corrosion-resistant crosslinked polyethylene material; Shielding layer (3) is covered outside the insulating layer (2), and the shielding layer (3) is woven by aluminum-magnesium alloy wire, for anti-electromagnetic interference; Protective layer (4) is covered outside the shielding layer (3), and the protective layer (4) is made of corrosion-resistant and low-temperature-resistant polymer material; Anti-freezing anticorrosive layer (5) is coated on the outer surface of the protective layer (4).

2. The cable suitable for permafrost and micro-corrosion environments of claim 1, wherein, The cable core (1) includes a plurality of conductors (11), each of the conductors (11) is stranded by a plurality of copper wires, and an insulating filler (12) is filled between two adjacent conductors (11), and the insulating filler (12) is made of a composite material of ceramic fiber and silicone rubber.

3. The cable suitable for permafrost and micro-corrosion environments of claim 2, wherein, The surface of the conductor (11) is plated with a tin layer, the thickness of the tin layer is 15 μm to 16 μm, and the pitch of the stranded copper wires is 17 mm to 18 mm.

4. The cable suitable for permafrost and micro-corrosion environments of claim 1, wherein, The thickness of the insulating layer (2) is 1 mm to 2 mm, and a moisture-proof layer (21) is further provided between the insulating layer (2) and the cable core (1), and the moisture-proof layer (21) is made of a water-absorbing and swelling material.

5. The cable suitable for permafrost and micro-corrosion environments of claim 1, wherein, The outer surface of the protective layer (4) is provided with a spiral groove for enhancing the tensile strength and frost heaving resistance of the cable.

6. The cable suitable for permafrost and micro-corrosion environments of claim 1, wherein, The thickness of the anti-freezing anticorrosive layer (5) is 0.5 mm to 1.5 mm.

7. The cable suitable for permafrost and micro-corrosion environments of claim 1, wherein, The surface of the cable is provided with a plurality of warning signs (6) distributed along the length direction of the cable, the warning signs (6) are made of fluorescent material, and the warning signs (6) are marked with relevant information of the cable, including cable model, rated voltage and applicable environment.

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