High-safety low-release halogen-free low-smoke B1-level fire-resistant cable

Abstract

The invention discloses a high-safety low-release halogen-free low-smoke B1-level fire-resistant cable, which comprises five groups of conductors, an insulating layer, a mica fire-resistant layer, a glass fiber filling layer, a glass fiber wrapping tape and an insulating sheath, wherein the mica fire-resistant layer is wound on the outer surface of the side edge of each conductor, the insulating layer is sleeved on the outer surface of the mica fire-resistant layer, the glass fiber wrapping tape is wound on the outer surface of the side edge of the insulating layer, the glass fiber filling layer is filled between the glass fiber wrapping tape and the insulating layer, and the outer surface of the side edge of the glass fiber wrapping tape is fixedly sleeved with the insulating sheath. According to the high-safety low-release halogen-free low-smoke B1-level fire-resistant cable, the cable has a double-layer protection structure, the safety during cable bending operation is improved, theeccentric phenomenon of the cable in the coiling bending process is avoided, the hardening cracking phenomenon of the cable is prevented, the service life of the cable is prolonged, and the stabilityof the cable is improved.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a high-safety, low-emission, halogen-free, low-smoke B1-grade fire-resistant cable. Background technique [0002] The cable is usually a rope-like cable twisted by several or several groups of wires. Each group of wires is insulated from each other and is often twisted around a center. The entire outside is covered with a highly insulating covering. The cable has Internally energized, externally insulated. [0003] The comparative document CN210575230U discloses a fire-resistant cable, including a wear-resistant protective sleeve and a connecting rod. The inner side of the wear-resistant protective sleeve is connected with a fixing plate, and the fixing plate is installed on the outer side of the fire-resistant cable body, and the inner side of the fire-resistant cable body A filling layer is provided, and the inside of the filling layer runs through the limiting plat...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the traditional refractory cable using mineral material as the raw material of the filling layer, the cable is prone to eccentricity during the bending process of the upper plate, which will not only affect the roundness of the appearance of the cable, but also be affected by the drying and hardening of the mineral material The influence of the influence makes the cable prone to breakage during the bending process, thereby reducing the safety of the fire-resistant cable when it is used; secondly, the traditional fire-resistant cable cannot adjust the twisting quantity and twisting angle of the conductor arbitrarily according to the processing requirements, which reduces the safety of the traditional fire-resistant cable. Flexibility during stranding operation; secondly, traditional fire-resistant cables are prone to loosening after stranding, which prevents users from performing auxiliary reinforcement operations on the twisted cables, reducing the stability of the stranding process of fire-resistant cables. And provide a high safety low emission halogen-free low-smoke B1 class fire-resistant cable

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