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Expansion type flame resistant cable

A fire-resistant cable, expansion type technology, applied in the field of fire-resistant cables, can solve the problems that the cables do not have fire resistance, etc., to achieve the effect of preventing heat intrusion, stable heat insulation layer, and good fire resistance

Inactive Publication Date: 2004-03-10
上海市高桥电缆厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the lack of fire resistance of the existing high-voltage cables of 6,000 volts and above

Method used

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  • Expansion type flame resistant cable
  • Expansion type flame resistant cable

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Experimental program
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Embodiment Construction

[0012] Examples, see figure 1 , an intumescent fire-resistant cable, the cable sheath 5 is provided with a plurality of insulated wire cores 1, the outer surface of the plurality of insulated wire cores 1 is provided with a spacer 2, and the spacer 2 is made of cross-linked polyethylene to play a waterproof role , the outer surface of the isolation sleeve 2 is filled with a mineral composite layer 3, the mineral composite layer 3 is mainly composed of aluminum hydroxide or magnesium hydroxide plus an expansion agent, the outer surface of the mineral composite layer 3 is provided with an expansion sleeve 4, and the expansion sleeve 4 is wrinkled In this way, when the mineral composite layer 3 is heated and expanded, the wrinkled refractory fabric will be forced to expand to increase the internal space. The outer surface of the expansion sleeve 4 is in contact with the inner wall of the sheath 5, and the sheath 5 is a halogen-free sheath or Sheathed in polyvinyl chloride.

[00...

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Abstract

In the structure of the cable, there are multiple insulated cores, distance sleeve, mineral matter laminate layer, expansion sleeve and sheath. The mineral matter laminate layer possesses feature of flame resistance. When a fire takes place, the mineral matter laminate layer begins to expand caused by heat and forming a stable thermal insulation layer. The expansion sleeve is also expanded, making the thermal insulation layer stable and integrity so as to prevent quantity of heat from incursion. Thus, temp in insulated core is lower than temp in outer flame obviously. Under 750 deg.C flame, the invented cable works normally for 90 minutes at rated voltage (GBl2666.6 standard) or 180 minutes (IEC331 standard).

Description

Technical field [0001] The invention relates to a fire-resistant cable with a voltage below 35,000 volts. Background technique [0002] At present, fire-resistant cables are cables of 1,000 volts and below, and cables of 6,000 volts and above basically do not have fire resistance. Contents of the invention [0003] In order to overcome the deficiency that the existing high-voltage cables of 6,000 volts and above do not have fire resistance. The invention provides an intumescent fire-resistant cable, which can be normally and safely used in flames for a period of time. [0004] The technical solution adopted by the present invention to solve the technical problem is: the expansion type fire-resistant cable has a plurality of insulated wire cores inside the cable sheath, and isolation sleeves are provided on the outer surfaces of the plurality of insulated wire cores, and the outer surface of the isolation sleeves is filled with ore. The material composite layer, the miner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/44H01B7/17H01B7/295
Inventor 张志清
Owner 上海市高桥电缆厂有限公司
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