大容量高可靠安全耐用型电力电缆

Abstract

本实用新型公开了大容量高可靠安全耐用型电力电缆，包括导体以及依次设置在导体之外的隔离绕包层、绝缘屏蔽套、阻水绕包层、疏绕屏蔽层、阻燃绕包层、隔离套、铠装绕包层和外护套，所述导体的截面面积≥800mm2；此种截面面积设计能够满足大容量电力传输需求，集成了大容量传输、多层安全防护、低能耗与长寿命特性，十分适用于对高负荷、对安全性和耐用性有严苛要求的电力传输场景，具有显著的经济与社会效益，推广应用前景广阔。

Claims

1. A high-capacity, highly reliable, safe and durable power cable, characterized by: The conductor (1) includes an insulating wrapping layer (2), an insulating shielding sleeve (3), a water-blocking wrapping layer (4), a loosely wound shielding layer (5), a flame-retardant wrapping layer (6), an insulating sleeve (7), an armored wrapping layer (8), and an outer sheath (9) arranged sequentially outside the conductor (1). The cross-sectional area of ​​the conductor (1) is ≥800mm². 2 .

2. The high-capacity, highly reliable, safe and durable power cable according to claim 1, characterized in that: The conductor (1) has a three-layer composite stranded structure. The inner layer structure of the conductor (1) is formed by stranding circular copper wires with an outer diameter of 2.5 to 3.0 mm at a pitch ratio of 10 to 14:

1. The middle layer structure of the conductor (1) is formed by stranding fan-shaped copper wires with a central angle of 50 to 70° at a pitch ratio of 13 to 17:

1. The outer layer structure of the conductor (1) is formed by stranding tile-shaped copper wires with an arc matching the outer arc of the fan-shaped copper wires at a pitch ratio of 16 to 20:

1. The stranding direction of the fan-shaped copper wires is opposite to the stranding direction of the circular copper wires and the tile-shaped copper wires, respectively.

3. The high-capacity, highly reliable, safe and durable power cable according to claim 1, characterized in that: The isolation wrapping layer (2) is formed by wrapping a conductor (1) with a semi-conductive nylon tape.

4. The high capacity, highly reliable, secure and durable power cable of claim 1, wherein: The insulating shielding sleeve (3) is extruded and covers the isolation wrapping layer (2) and has a three-layer co-extrusion structure. The inner layer structure of the insulating shielding sleeve (3) is a conductor shielding layer (31) with a thickness of 0.8 to 1.2 mm. The middle layer structure of the insulating shielding sleeve (3) is an insulating layer (32) with a thickness of 8.5 to 12.5 mm. The outer layer structure of the insulating shielding sleeve (3) is an insulating shielding layer (33) with a thickness of 1.0 to 1.4 mm.

5. The high capacity, highly reliable, secure and durable power cable as claimed in claim 1, wherein: The water-blocking wrapping layer (4) is formed by wrapping an insulating shielding sleeve (3) with a semi-conductive water-blocking tape.

6. The high capacity, highly reliable, secure and durable power cable of claim 1, wherein: The sparse winding shielding layer (5) is formed by 35-50mm 2 The copper wire sparse winding water-blocking wrapping layer (4) is formed.

7. The high capacity, highly reliable, secure and durable power cable as claimed in claim 1, wherein: The flame-retardant wrapping layer (6) is formed by wrapping a halogen-free flame-retardant tape around a shielding layer (5).

8. The high capacity, highly reliable, secure and durable power cable as claimed in claim 1, wherein: The isolation sleeve (7) is an extruded flame-retardant polyvinyl chloride sleeve that covers the flame-retardant wrapping layer (6).

9. The high-capacity, high-reliability, safe, and durable power cable as described in claim 1, characterized in that: The armor wrapping layer (8) is formed by wrapping a non-magnetic stainless steel strip around an isolation sleeve (7).

10. The high capacity, highly reliable, secure and durable power cable as claimed in claim 1, wherein: The outer sheath (9) is an extruded flame-retardant polyvinyl chloride sheath that covers the armor wrapping layer (8).

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