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Improved-type medium-voltage fireproof power cable

An improved technology for power cables, which is applied to power cables with shielding layers/conductive layers, insulated cables, cables, etc., can solve problems such as failure to meet the design requirements of the electric field in cables, and achieve convenient processing, high voltage levels, and materials. Easy to get effect

Inactive Publication Date: 2016-09-28
JIANGSU HONGFENG CABLE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high voltage, the traditional mica tape fire-resistant cable structure cannot meet the design requirements of the electric field in the cable and is completely unsuitable

Method used

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, the present invention will be described in further detail:

[0013] Such as figure 1 As shown, an improved medium-voltage fire-resistant power cable according to the present invention includes a cable core, and the cable core is twisted from several insulated cores; the insulated cores are made of copper conductors 1, The three-layer co-extrusion method sequentially extrudes the semi-conductive conductor shielding layer 2 with a thickness of 2-3mm, the cross-linked polyethylene insulating layer with a thickness of 4-5mm, and the semi-conductive insulating shielding layer with a thickness of 3-5mm. 4 and a copper tape metal shielding layer 5 with a thickness of 2-4mm wrapped around the semiconducting insulating shielding layer.

[0014] Then extrude the inorganic hydration filling layer 6 at the gap of the cable core, and extrude the first halogen-free low-smoke flame-retardant glass fiber tape 7 with a thickness of 0.1-0...

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Abstract

The invention discloses an improved-type medium-voltage fireproof power cable, and the cable comprises a cable core. The cable is characterized in that the cable core is formed by the twisting of a plurality of insulating wire cores; a gap of the cable core is provided with an inorganic hydrous filling layer; the cable core is wrapped by a first low-smoke halogen-free flame-retardant glass fiber belt; the first low-smoke halogen-free flame-retardant glass fiber belt is wrapped by a ceramic silicone rubber isolating sleeve; the ceramic silicone rubber isolating sleeve is wrapped by a second low-smoke halogen-free flame-retardant glass fiber belt in an extruding manner; the exterior of the low-smoke halogen-free flame-retardant glass fiber belt is provided with a zinc-plated steel tape armored layer in a braided manner; and the outermost layer of the cable is provided with a low-smoke halogen-free flame-retardant external sheath or an aluminum sheath in an extruding manner. The cable can meet the requirements of electric performances and fireproof performances at the same time, is more reasonable in structure, is simple in manufacture technology, is reasonable in price, is long in service life, is high in safety, and is mainly used for urban buildings and common places where fire prevention is needed.

Description

technical field [0001] The invention relates to the field of cables, in particular to an improved medium-voltage fire-resistant power cable. Background technique [0002] The existing fire-resistant cable technology is widely used in low-voltage cables, the voltage level is 1kV and below, and the cable structure is to use fire-resistant mica tape to achieve fire-resistant functions. The products are mainly used in buildings and public places that require fire protection in cities. From distribution boxes Or the transformer transmits the electric energy to each power consumption unit. [0003] With the development of high-rise buildings, the improvement of fire protection rating, and the strengthening of people's safety awareness, some buildings need to use fire-resistant cables to transmit higher voltage to the top of the building. Due to the high voltage, the traditional mica tape fire-resistant cable structure cannot meet the design requirements of the electric field in t...

Claims

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Application Information

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IPC IPC(8): H01B7/17H01B7/29H01B7/295H01B9/02
CPCH01B7/29H01B7/17H01B7/295H01B9/02
Inventor 杨洪新高宇王佳伟王军
Owner JIANGSU HONGFENG CABLE GROUP
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