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Super-flexible super-long-time fire-resistant mineral insulated cable and production process thereof

A kind of mineral insulated cable, special flexible technology, applied in the direction of insulated cables, insulated conductors, flexible cables, etc., can solve the problems of low fire resistance and poor bending performance of fireproof cables, and achieve remarkable fire resistance and best fire resistance Effective, disaster loss reduction effect

Pending Publication Date: 2020-10-13
昆明电缆集团昆电工电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problems of low fire resistance and poor bending performance of existing fireproof cables

Method used

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  • Super-flexible super-long-time fire-resistant mineral insulated cable and production process thereof
  • Super-flexible super-long-time fire-resistant mineral insulated cable and production process thereof
  • Super-flexible super-long-time fire-resistant mineral insulated cable and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as figure 1 Shown: a super-flexible ultra-long-time fire-resistant mineral insulated cable, comprising: a core, a cable core, a fireproof layer 6, and an outer sheath 7; the core is twisted and filled with flame retardant 4 to form the cable core. The flame retardant 4 includes an alkali-free glass fiber rope in inorganic minerals. The cable core is wrapped with a fireproof layer 6 and an outer sheath 7 in sequence; the fireproof layer 6 is made of 1mm thick ceramicized polyolefin, and the fireproof layer 6 is closely attached to the inside and outside of the first glass fiber tape 51 and the second glass. Cellulose tape 52. The first glass fiber tape 51 and the second glass fiber tape 52 are 0.2×50 mm alkali-free glass fiber tapes. The outer sheath 7 is made of a 90°C flame-retardant, low-smoke, halogen-free sheath material, and the average extruded thickness of the outer sheath 7 is 1.8 mm.

[0048] The core includes a conductor 1, an insulating layer a2 wrapped a...

Embodiment 2

[0050] The difference between this embodiment and Embodiment 1 is that the fireproof layer 6 between the first glass fiber tape 51 and the second glass fiber tape 52 of 0.2×50 mm is extruded with a ceramicized polyolefin of 2 mm thickness; Example 1 is the same. Under the condition of the fire resistance temperature of 950-1000°C according to GB / T19216-2003, the cable of this embodiment has no fuse fusing and continuous conductors for 340 minutes, which exceeds the standard fire resistance requirement of 180 minutes. And according to BS 8491:2008, in the environment of fire supply + mechanical shock + water spray, the temperature of the fire supply is 950-1000 DEG C. The cable of the present invention has no fuse fusing, continuous conductor, and no cable breakdown. The minimum bending radius of this type of super-flexible ultra-long-time fire-resistant mineral insulated cable can reach 9.5 times the outer diameter of the cable.

Embodiment 3

[0052] The difference between this embodiment and embodiment 1 or 2 is that the fireproof layer 6 between the 0.2×50mm first glass fiber tape 51 and the second glass fiber tape 52 is extruded with 3mm thick ceramicized polyolefin; Others are the same as Embodiment 1 or 2. Under the condition of the fire resistance temperature of 950-1000°C according to GB / T19216-2003, the cable of this embodiment has no fuse fusing and continuous conductors for 360 minutes, which exceeds the standard fire resistance requirement of 180 minutes. And according to BS8491:2008, in the environment of fire supply + mechanical shock + water spray, the temperature of the fire supply is 950-1000°C, the cable of the present invention has no fuse fusing, continuous conductor, and no cable breakdown. The minimum bending radius of this type of super-flexible ultra-long-time fire-resistant mineral insulated cable can reach between 9.5 times and 10 times the outer diameter of the cable.

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Abstract

The invention discloses a super-flexible super-long-time fire-resistant mineral insulated cable and a production process thereof, and belongs to the technical field of cables. The cable comprises wirecores, a cable core, a fireproof layer and an outer sheath. The wire cores are stranded and filled with flame retardant materials to form the cable core, and the cable core is sequentially wrapped bythe fireproof layer and the outer sheath. Each wire core comprises a plurality of layers of mica tapes; the fireproof layer is made of ceramic polyolefin with the thickness of 1-3.5 mm, and a first wrapping layer and a second wrapping layer are arranged inside and outside the fireproof layer respectively. Therefore, the fire resistance, the insulativity and the bending property of the cable are improved, the laying difficulty of the cable is reduced, the fire resistance is particularly remarkable, and the cable is complete in structure and continuously powered on for more than 5 hours under the condition that the fire resistance temperature ranges from 950 DEG C to 1000 DEG C.

Description

Technical field [0001] The invention discloses a fire-resistant cable and a production process thereof, in particular to a particularly flexible ultra-long-time fire-resistant mineral insulated cable and a production process thereof, and belongs to the technical field of cables. Background technique [0002] With the continuous development of society, the number of urban population is increasing rapidly. Corresponding public facilities and places such as high-rise buildings, hotels, large shopping malls, hospitals, stations, etc. are also increasing. The importance of fire safety has become more important. The power supply safety of facilities is becoming more and more important. In the event of a fire, how to ensure that the power supply of power facilities is unblocked for a certain period of time, so that the precious rescue time can be extended, and the casualties and property losses caused by the fire can be reduced. This has always been a subject of continuous research and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/04H01B7/02H01B7/29H01B7/295H01B13/00
CPCH01B7/0225H01B7/025H01B7/0283H01B7/04H01B7/29H01B7/295H01B13/00
Inventor 宋灿锋习有建蒋思敏李药保王飞房跃斌吴永山蒋为民
Owner 昆明电缆集团昆电工电缆有限公司
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