Anti-termite flame-retardant high-voltage cable

Abstract

The utility model discloses an anti-termite flame-retardant high-voltage cable, which comprises a body, the body comprises a wire core (1), the outer layer of the wire core (1) is wrapped by a buffer layer (2) and a waterproof layer (3) from inside to outside, the buffer layer (2) is formed by alternately lapping a metal wire cloth belt (2.1) and a semi-conductive buffer belt (2.2), and the metal wire cloth belt (2.1) and the semi-conductive buffer belt (2.2) are wrapped by the waterproof layer (3). The waterproof layer (3) is formed by alternately lapping a semi-conductive waterproof buffer strip (3.1) and a semi-conductive butyl adhesive tape (3.2), the outer layer of the body sequentially comprises an inner protective layer (4) and an outer protective layer (5) from inside to outside, the inner protective layer (4) is a nylon sheath, and the outer protective layer (5) is a flame-retardant anti-termite sheath. The anti-termite flame-retardant high-voltage cable provided by the utility model is anti-high-temperature combustion and anti-termite.

Description

Technical Field

[0001] This utility model relates to the field of cables, specifically a termite-proof and flame-retardant high-voltage cable. Background Technology

[0002] Cables are essential tools for power and signal transmission, making outstanding contributions to the popularization of electricity in China. Given my country's vast territory and diverse terrain, cable laying requires appropriate protective designs based on the laying environment to ensure long-term usability.

[0003] In some high-temperature areas, not only are the temperatures high, but they are also often accompanied by ant infestations, making it difficult for conventional cable protection designs to meet cable safety standards. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a flame-retardant high-voltage cable that is resistant to high-temperature combustion and ants.

[0005] The technical solution adopted by this utility model to solve the above problems is as follows: a termite-proof and flame-retardant high-voltage cable, comprising a body, the body comprising a conductor, the outer layer of the conductor being wrapped with a buffer layer and a water-blocking layer from the inside out, the buffer layer being formed by alternating wrapping of metal wire tape and semi-conductive buffer tape, the water-blocking layer being formed by alternating wrapping of semi-conductive water-blocking buffer tape and semi-conductive butyl tape, the outer layer of the body comprising an inner sheath and an outer sheath from the inside out, the inner sheath being a nylon sheath, and the outer sheath being a flame-retardant and termite-proof sheath.

[0006] Compared with existing technologies, the advantages of this utility model are as follows: In the buffer layer, the metal wire tape can improve the strength of the cable, and the alternating wrapping design of the metal wire tape and the semi-conductive buffer tape can achieve the effect of semi-conductive shielding; In the water-blocking layer, the semi-conductive water-resistant buffer tape serves as both water-blocking and semi-conductive shielding, and the multi-layer design of the semi-conductive water-resistant buffer tape and the semi-conductive buffer tape increases the shielding rate of the semi-conductive shielding; while the semi-conductive butyl tape is used to enhance the waterproof effect of the water-blocking layer, increase the sealing performance of the water-blocking layer, prevent water from seeping into the cable, and ensure the quality of cable use. Simultaneously, the semi-conductive butyl tape has strong temperature adaptability, maintaining good performance from -40℃ to 90℃, thus forming an internal anti-ablation effect on the cable. The alternating wrapping of semiconducting resistive water buffer tape and semiconducting butyl tape can prevent rapid diffusion between materials in the same layer during ablation, and the alternating wrapping structure can form a blocking effect. On the outer layer of the cable, the outer sheath is made of high-temperature resistant termite-proof material to form a flame-retardant and termite-proof sheath. The outer sheath is the area most directly exposed to high temperatures and termite infestation, so the outer sheath needs to be changed directly according to the usage environment. The nylon sheath of the inner sheath is mainly used to enhance the surface strength of the cable. The outer sheath uses the chemical properties of the material to keep ants away from the cable, while the inner sheath uses the physical strength properties of the material to prevent ants from damaging the cable, thus achieving multi-faceted cable termite prevention measures. The outer and inner sheaths can be simultaneously extruded into the surface of the cable using a two-color co-extrusion technology.

[0007] As an improvement of this utility model, a metal shielding layer and an MDPE sheath layer are further included between the water-blocking layer and the inner sheath. The metal shielding layer is bonded to the water-blocking layer, and the MDPE sheath layer is bonded to the inner sheath. Through this improvement, the functions of electrical signal shielding, reducing electromagnetic interference, and reducing signal leakage of the metal shielding layer in traditional cables are maintained, as well as the protective function of the MDPE sheath layer. At the same time, the buffer layer and water-blocking layer are separated from the inner and outer sheaths. The buffer layer and water-blocking layer are mainly used to prevent the internal high-temperature erosion of the cable during the electrical transmission process, while the outer and inner sheaths are mainly used to prevent high-temperature combustion in the external environment. The metal shielding layer and MDPE sheath layer can avoid the situation of internal and external high temperatures of the cable being sandwiched. Furthermore, the metal shielding layer and MDPE sheath layer wrapped around the water-blocking layer have good adhesion and prevent the separation of the alternating wrapping structure of the semi-conductive water-blocking buffer tape and the semi-conductive butyl tape.

[0008] As an improvement of this utility model, the outer layer of the outer sheath is further wrapped with a conductive sheath layer. Through this improvement, the influence and interference of external electromagnetic waves on the cable are limited, ensuring the normal operation of the cable, and at the same time, the loss during the power transmission process of the cable can be reduced.

[0009] As an improvement of this utility model, the core includes a water-blocking conductor, which is composed of multiple copper wires wrapped with water-blocking tape. Through this improvement, high-temperature environments often have large temperature differences between day and night. At night, metal surfaces easily absorb water molecules from the air and condense into water droplets. By wrapping the copper wires with water-blocking tape, it is possible to prevent the copper wires from absorbing water molecules from the air between the copper wires and condensing water on the surface of the copper wires at night, thereby ensuring the safety of the cable. Although the probability is extremely low, it is still necessary to take precautions.

[0010] As an improvement of this utility model, the water-blocking conductor is formed by splicing together multiple fan-shaped conductor segments. Through this improvement, the skin effect of the water-blocking conductor during power transmission can be reduced, and the concentration of electricity towards the outer edge of the water-blocking conductor can be reduced. When the skin effect occurs, the electricity will concentrate towards the edge of the conductor segment. However, only the arc length of the conductor segment coincides with the outer edge of the water-blocking conductor, while the side length is inside the water-blocking conductor, thereby reducing the influence of the skin effect and improving the power transmission efficiency.

[0011] As an improvement of this utility model, a conductor dividing layer is provided between adjacent conductor dividing blocks. The conductor dividing layer is made of crepe paper. Through this improvement, insulation between conductor dividing blocks is achieved, ensuring the effect of reducing skin effect. At the same time, the mechanical strength of the water-blocking conductor and the wear resistance between conductor dividing blocks are also improved.

[0012] As an improvement of this utility model, the outer layer of the water-blocking conductor is shaped by a conductor wrapping layer, which is made of semi-conductive tape. Through this improvement, the water-blocking conductor is bundled and shaped to ensure that the conductor segments are cylindrical after splicing, thereby ensuring the forming quality of the cable in the subsequent forming process and thus ensuring the quality of the cable in use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0014] The diagram shows: 1. Core wire; 1.1. Conductor divider; 1.2. Crepe paper; 1.3. Conductor wrapping layer; 2. Buffer layer; 2.1. Metal wire tape; 2.2. Semi-conductive buffer tape; 3. Water-blocking layer; 3.1. Semi-conductive water-blocking buffer tape; 3.2. Semi-conductive butyl tape; 4. Inner sheath; 5. Outer sheath; 6. Metal shielding layer; 7. MDPE sheath layer; 8. Conductive sheath layer. Detailed Implementation

[0015] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0016] like Figure 1As shown, a termite-proof and flame-retardant high-voltage cable includes a body, which includes a conductor 1. The outer layer of the conductor 1 is wrapped with a buffer layer 2 and a water-blocking layer 3 from the inside out. The buffer layer 2 is formed by alternately wrapping metal wire tape 2.1 and semi-conductive buffer tape 2.2. The water-blocking layer 3 is formed by alternately wrapping semi-conductive water-blocking buffer tape 3.1 and semi-conductive butyl tape 3.2. The outer layer of the body includes an inner sheath 4 and an outer sheath 5 from the inside out. The inner sheath 4 is a nylon sheath, and the outer sheath 5 is a flame-retardant and termite-proof sheath.

[0017] The water-blocking layer 3 and the inner protective layer 4 are further divided into a metal shielding layer 6 and an MDPE sheath layer 7. The metal shielding layer 6 is bonded to the water-blocking layer 3, and the MDPE sheath layer 7 is bonded to the inner protective layer 4. The metal shielding layer 6 is made of aluminum.

[0018] The outer protective layer 5 is further wrapped with a conductive sheath layer 8.

[0019] The core 1 includes a water-blocking conductor, which is composed of multiple copper wires wrapped with water-blocking tape. The water-blocking conductor is formed by splicing together multiple fan-shaped conductor segments 1.1. A conductor segmentation layer is provided between adjacent conductor segments 1.1. The conductor segmentation layer is made of crepe paper 1.2. The outer layer of the water-blocking conductor is shaped by a conductor wrapping layer 1.3, which is made of semi-conductive tape.

[0020] Between the core 1 and the buffer layer 2, there is still a conventional inner shielding layer, XLPE insulation layer, and outer shielding layer structure from the inside out.

[0021] The design of this termite-proof and flame-retardant high-voltage cable ensures its suitability for installation in high-temperature, termite-prone environments. Regarding temperature, the outer sheath 5 ensures adaptability to high-temperature environments, while the water-blocking layer 3 prevents the cable from burning and spreading due to internal high temperatures, and protects it from the adverse working environment of being caught between internal and external heat. For termite prevention, both physical strength and chemical properties prevent ants from biting the cable, thus achieving the intended termite protection. Furthermore, the design fully considers the activity of water in high-temperature environments and the tendency for condensation on metal surfaces at low nighttime temperatures, incorporating the water-blocking layer 3 and the water-blocking strip in the core 1 to ensure the cable's safety during use.

[0022] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A termite-proof and flame-retardant high-voltage cable, comprising a body, characterized in that: The body includes a wire core (1), and the outer layer of the wire core (1) is wrapped with a buffer layer (2) and a water-blocking layer (3) from the inside out. The buffer layer (2) is formed by alternately wrapping metal wire cloth tape (2.1) and semi-conductive buffer tape (2.2). The water-blocking layer (3) is formed by alternately wrapping semi-conductive water-blocking buffer tape (3.1) and semi-conductive butyl tape (3.2). The outer layer of the body includes an inner sheath (4) and an outer sheath (5) from the inside out. The inner sheath (4) is a nylon sheath, and the outer sheath (5) is a flame-retardant and termite-proof sheath.

2. The termite-proof and flame-retardant high-voltage cable according to claim 1, characterized in that: The water-blocking layer (3) and the inner protective layer (4) are further provided with a metal shielding layer (6) and an MDPE sheath layer (7), the metal shielding layer (6) being bonded to the water-blocking layer (3) and the MDPE sheath layer (7) being bonded to the inner protective layer (4).

3. The termite-proof and flame-retardant high-voltage cable according to claim 1, characterized in that: The outer layer (5) is also wrapped with a conductive sheath layer (8).

4. The termite-proof and flame-retardant high-voltage cable according to claim 1, characterized in that: The core (1) includes a water-blocking conductor, which is composed of multiple copper wires wrapped with water-blocking tape.

5. The termite-proof and flame-retardant high-voltage cable according to claim 4, characterized in that: The water-blocking conductor is formed by splicing together multiple fan-shaped conductor segments (1.1).

6. The termite-proof and flame-retardant high-voltage cable according to claim 5, characterized in that: A conductor dividing layer is provided between adjacent conductor dividing blocks (1.1), and the conductor dividing layer is made of crepe paper (1.2).

7. The termite-proof and flame-retardant high-voltage cable according to claim 5, characterized in that: The outer layer of the water-blocking conductor is shaped by a conductor wrapping layer (1.3), which is formed by wrapping a semi-conductive strip.

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