High-strength tooth-form composite halogen-free photovoltaic line cable

Abstract

The invention discloses a high-strength tooth-form composite halogen-free photovoltaic line cable, and the cable comprises an elastic support, conductor core wires, a fluoroplastic insulating layer, a buffering layer, a steel wire braiding armored layer, an insulating silica gel heat dissipation layer, and a heat dissipation belt. The plurality of conductor core wires are twisted together to form three bundles, and are uniformly the elastic support in a peripheral direction from the inside to the outside. A mineral substance fire-insulating material is placed in a gap between the elastic support and the conductor core wires. The outer side of the elastic support is sequentially wrapped by a metal shielding layer, the fluoroplastic insulating layer, a magnesium and silica alloy braided layer, a buffering layer steel wire braiding armored layer, an insulating silicon gel heat dissipation layer, and a heat dissipation layer. A tooth-shaped projection at an outer layer of the cable is equivalent to a limiting strip. For a plurality of parallel cables, the cable effectively avoid the twisting and mixed winding of cables because the tooth-shaped projection among cables plays a good effect in limiting and fixing, and brings convenience for wiring.

Description

technical field [0001] The invention relates to the technical field of photovoltaic cables, in particular to a high-strength tooth-shaped composite halogen-free photovoltaic line cable. Background technique [0002] Photovoltaic cables are used in photovoltaic systems for partial connections between photovoltaic cells and photovoltaic converter DC terminals or between junction boxes between DC / AC inverters and photovoltaic systems. They are an important component of photovoltaic equipment, as The backbone of power transmission of solar photovoltaic power generation facilities is directly related to the safety, reliability and advancement of solar photovoltaic power generation systems. At present, the research and development of photovoltaic cables in my country started relatively late, and the foundation is weak. Due to the lag in technological development and personnel training, the research and development strength is weak, and the ability of independent innovation is lack...

AI Technical Summary

Problems solved by technology

[0003] With the development of society, more and more photovoltaic cables are used, and the application fields are becoming more and more extensive. The requirements for cable types and performance are also getting higher and higher. At present, most of the sheaths of photovoltaic cables are made of plastic and rubber. Composed of organic polymers, generally one layer, when used in some environments, the protection of the cable core is not enough, especially when it is often squeezed by the outside world, it is easy to damage the cable core, and the insulating material and sheath of the photovoltaic cable The material does not have good heat resistance, cold resistance, oil resistance, ultraviolet resistance, ozone resistance and weather resistance, and burning will produce toxic and harmful gases, which will affect the normal use of the cable

[0004] For this reason, Chinese patent CN205050600U discloses a high-strength extrusion-resistant low-smoke halogen-free photovoltaic cable, including an elastic support frame, a conductor, a fluoroplastic insulation layer, a buffer layer, and a low-smoke halogen-free polyolefin sheath. The conductors are twisted into three bundles and placed in the elastic support frame. The gap between the elastic support frame and the conductor is filled with mineral fire-proof material. The outside of the elastic support frame is wrapped with metal shielding layer, fluoroplastic insulation layer, Magnesium-silicon alloy wire braiding layer, buffer layer and low-smoke halogen-free polyolefin sheath. The elastic support frame is composed of support rings and support ribs. This invention effectively releases and excludes external pressure, increases the extrusion resistance of the cable, and enhances the overall strength of the cable. Structural strength and tensile properties, with high strength, extrusion resistance, insulation, flame retardant performance; but in the actual application process, the wiring installation of photovoltaic cables often adopts multi-line parallel in order to save overhead brackets or cable channels The traditional smooth surface structure of the cable surface is prone to twisted wires in the multi-wire parallel installation structure and requires a lot of auxiliary structures for the positioning of the partitions. The installation is very troublesome and needs to be improved urgently.

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