Fire-resistant cable

A fire-resistant cable and cable technology, applied in the field of fire-resistant cables, can solve the problems of poor waterproof and mechanical properties, fire-resistant and flame-retardant performance needs to be improved, and unsatisfactory flame-retardant effects, etc., to achieve good corona resistance and arc resistance , long service life, good resilience effect

Pending Publication Date: 2020-12-01
国网河南省电力公司桐柏县供电公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fire-resistant cable material has defects such as poor waterproof performance and poor mechanical properties. The refractory filler is an inorganic filler. Magnesium hydroxide, aluminum nitride, etc. have a certain flame-retardant effect, which cannot block the air, and the flame-retardant effect is not ideal. improve

Method used

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Examples

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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, this embodiment provides a fire-resistant cable, including a cable core and an outer protective sheath wrapped around the cable core; the cable core includes a conductive core 7 and is wrapped on the conductive core 7 The inner protective cover; the outer protective cover is the first insulating layer 3, the filling interlayer 2 and the second insulating layer 1 from the inside to the outside; the inner protective cover is the first protective layer 6 from the inside to the outside, and the third insulating layer Layer 5 and the second protective layer 4. The materials of the first insulating layer 3 , the second insulating layer 1 and the third insulating layer 5 are all polyethylene. The filling interlayer 2 is steel wire wrapped with polyethylene. The second protective layer 4 is silicone rubber.

[0026] The first protective layer 6 is made of raw materials in parts by weight shown in Table 1, wherein the flame retardant is chlorinated ...

Embodiment 2

[0028] This embodiment provides a fire-resistant cable, the difference in Embodiment 1 is that the first protective layer described in this embodiment is made of the raw materials shown in Table 1, wherein the flame retardant is boric acid Sodium, the water repellent is calcium stearate.

Embodiment 3

[0030] This embodiment provides a fire-resistant cable. The difference in Embodiment 1 is that the first protective layer described in this embodiment is made of raw materials in parts by weight shown in Table 1, wherein the flame retardant is three Antimony oxide, the waterproofing agent is calcium stearate.

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Abstract

The invention provides a fire-resistant cable, which belongs to the technical field of cables and comprises a cable core and an outer protective sleeve wrapping the cable core, the cable wire core comprises a conductive wire core and an inner protective sleeve wrapping the conductive wire core. The outer protective sleeve sequentially comprises a first insulating layer, a filling interlayer and asecond insulating layer from inside to outside. The inner protective sleeve sequentially comprises a first protective layer, a third insulating layer and a second protective layer from inside to outside. The three layers of inner protective sleeves and the three layers of outer protective sleeves are used for effectively protecting the conductive wire cores, and the service life of the cable is long. The first protective layer shows excellent water resistance, flame retardance and mechanical performance, the water absorption rate is 43.2% or below, the elongation at break reaches 333% or above, the tensile strength reaches 22.1 Mpa or above, the oxygen index reaches 66 or above, and the IA-grade fire-resistant and flame-retardant effects are good.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a fire-resistant cable. Background technique [0002] Today, as the information network is more and more developed, cables, as an important information transmission medium, spread all over the world. Most of the cables currently on the market are extruded insulation outside the conductor, and there is no effective fire-resistant isolation layer between one or more pairs of insulated wires. Although the cable with this structure has superior electrical transmission performance, its disadvantage is that in the event of a fire, the cable will soften the insulation or even burn directly due to the high temperature of the fire or the burning of an open flame in a short period of time. The conductor is short-circuited or disconnected, resulting in the loss of its superior transmission performance, and the loss of necessary safety functions such as providing information, ensuring rescue...

Claims

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Application Information

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IPC IPC(8): H01B7/295H01B7/282H01B7/28H01B7/22H01B7/18H01B7/02H01B3/44C08L23/34C08L83/08C08L91/06C08K13/02C08K5/053C08K3/36C08K3/34C08K3/38C08K3/22
CPCH01B7/295H01B7/2825H01B7/2806H01B7/28H01B7/22H01B7/1875H01B7/0225H01B3/443C08L23/34C08L2201/02C08L2201/08C08K2003/387Y02A30/14
Inventor 武嶺杨爽王金华
Owner 国网河南省电力公司桐柏县供电公司
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