Shield-type fire-retardant solar photovoltaic cable

Abstract

The invention discloses a shield-type fire-retardant solar photovoltaic cable and belongs to the technical field of electric wires and cables. The shield-type fire-retardant solar photovoltaic cable comprises cable cores, a fire-retardant wrapping tape layer, a metal shielding layer and an outer sheath, wherein the fire-retardant wrapping tape layer is arranged outside the cable cores, the metal shielding layer is arranged outside the fire-retardant wrapping tape layer, and the outer sheath is arranged outside the metal shielding layer. The shield-type fire-retardant solar photovoltaic cable is characterized in that each cable core comprises cable core conductors, a cable core conductor fire-retardant band and a cable core conductor insulating-sheath layer, the cable core conductor fire-retardant band are wound outside the cable core conductors, the cable core conductor insulating-sheath layer is covered outside the cable core conductor fire-retardant band in a squeezed manner, and an inside liner is arranged between the cable core conductor fire-retardant band and the metal shielding layer. By the arrangement, overall fire-retardant effect of a cable can be remarkably improved; resistance to electromagnetic interference is good; poisonous and noxious gas cannot be released when the cable is burning, so that safety can be guaranteed, and environmental protection can be realized.

Description

Technical field [0001] The invention belongs to the technical field of wires and cables, and particularly relates to a shielded fire-retardant solar photovoltaic cable. Background technique [0002] Technical information about solar photovoltaic cables can be found in published Chinese patent documents, such as "Control Cables for Desert Solar Photovoltaic Power Stations" recommended by Authorization Announcement Number CN201514793U, "Solar Photovoltaic Cables" provided by CN202384033U, and "Anticorrosive Solar Energy" introduced by CN202502774U Photovoltaic control cables", etc. [0003] Typical examples are the "solar photovoltaic fire-resistant cable" disclosed in document A.CN201868128U and the "low-smoke, halogen-free flame-retardant photovoltaic cable" disclosed in document B.CN202615873U. Document A has the following technical problems: First, because the core conductor is directly extruded with the insulating layer, the core conductor itself has a weak fire-resistant and f...

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Problems solved by technology

Document A has the following technical problems: one is that the fire and flame retardant function of the core conductor itself is relatively weak because the insulation layer is directly extruded outside the core conductor; shielding layer), so although it can reflect the due shielding effect, the overall flame retardant effect on the cable core is not enough to meet the industry's expectations; third, because the insulating layer and the outer sheath do not have environmental protection effects, there are The risk of releasing toxic and harmful gases, which constitutes secondary hazards and pollutes the environment

This document B has the following deficiencies: First, although the ceramic silica gel refractory layer can be significantly improved outside the tinned oxygen-free copper soft conductor as the core conductor, the fire-resistant and corrosion-resistant effect of the core conductor can be significantly improved. Extruded and irradiated cross-linked polyethylene-vinyl acetate copolymer insulation layer, so the overall fire and flame retardant effect of photovoltaic cables cannot be reliably guaranteed; second, because it does not have shielding function, it is susceptible to electromagnetic interference; third, the same There is the third deficiency of said document A

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