Halogen-free low-smoke flame-retardant cross-linked polyolefin insulated environmental protection cable

A low-smoke, flame-retardant, cross-linked technology, which is applied in the direction of insulated cables, insulated conductors, organic insulators, etc., can solve the problems of long-distance cable damage, reduce the contact area, ensure the water-blocking effect, and increase the flame-retardant effect. Effect

Active Publication Date: 2019-03-19
四川塔牌电缆集团有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing cable structure is likely to cause moisture to immerse along the axial direction of the cable, causing long-distance damage to the cable. Moisture impregnates along the axial direction of the cable, which affects the electrical properties of the cable and reduces losses at the same time

Method used

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  • Halogen-free low-smoke flame-retardant cross-linked polyolefin insulated environmental protection cable
  • Halogen-free low-smoke flame-retardant cross-linked polyolefin insulated environmental protection cable

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the halogen-free low-smoke flame-retardant cross-linked polyolefin insulated environmental protection cable of the present invention includes a three-phase cable core 1, an insulation layer 2 is provided outside the cable core 1, and a water blocking filling layer is sequentially provided outside the insulation layer 2 3. The tape 4 and inner sheath, and the water blocking filling layer 3 is filled with water blocking yarn. The inner sheath includes a first inner sheath 5, the first inner sheath 5 includes a first flame-retardant ring sleeve 51 and a first water-blocking ring sleeve 52, and the first flame-retardant ring sleeve 51 along the long axis of the cable And the first water blocking ring sleeve 52 alternately arranged and connected by glue

Embodiment 2

[0029] Further improved on the basis of Example 1, a halogen-free low-smoke flame-retardant cross-linked polyolefin insulated environmental protection cable, the inner sheath also includes a second inner sheath 6, the second inner sheath 6 is arranged in the first inner Outside the sheath 5, the second inner sheath 6 includes a second flame-retardant ring sleeve 61 and a second water blocking ring sleeve 62. The second flame-retardant ring sleeve 61 and the second water-blocking ring sleeve 62 are alternately arranged and connected along the long axis of the cable. The second flame-retardant ring sleeve 61 and the first flame-retardant ring sleeve 51 have the same axial length. The axial lengths of the water blocking ring sleeve 62 and the first water blocking ring sleeve 52 are equal; and in the radial direction of the cable, the second flame-retardant ring sleeve 61 is in contact and opposed to the first water blocking ring sleeve 52. The ring sleeve 62 is in contact and oppo...

Embodiment 3

[0031] Such as figure 2 As shown, further improved on the basis of embodiment 2, a halogen-free low-smoke flame-retardant cross-linked polyolefin insulated environmental protection cable, the outer diameter of the interface end of the first flame-retardant ring sleeve 51 is smaller than that of the first flame-retardant ring sleeve 51 The outer diameter of the ring sleeve section, the inner diameter of the interface end of the first water blocking ring sleeve 52 is larger than the inner diameter of the main ring sleeve section of the first water blocking ring sleeve 52, and the interface end of the first water blocking ring sleeve 52 is sleeved on the first flame-retardant ring sleeve 51 is connected to the interface end; the outer diameter of the interface end of the second flame-retardant ring sleeve 61 is smaller than the outer diameter of the main ring sleeve section of the second flame-retardant ring sleeve 61, and the inner diameter of the interface end of the second wate...

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Abstract

The invention discloses a halogen-free low-smoke and flame-retardant crosslinked polyolefin insulating environment-friendly cable comprising three phases of cable cores. Each cable core is externally provided with an insulating layer. The insulating layers are externally provided with a waterproof filling layer, a wrapping tape and internal sheaths in turn. The internal sheaths comprise first internal sheaths. The first internal sheaths comprise a first flame-retardant loop sheath and a first waterproof loop sheath, and the first flame-retardant loop sheath and the first waterproof loop sheath are alternately arranged and connected along the long axial direction of the cable. The moisture can be effectively prevented from soaking along the axial direction of the cable to influence the electric performance of the cable, and the loss can also be reduced.

Description

Technical field [0001] The invention relates to a cable, in particular to a halogen-free low-smoke flame-retardant cross-linked polyolefin insulated environmental protection cable. Background technique [0002] If the cable generates a large amount of toxic gas and smoke during the combustion process, it will have a great impact on the escape of personnel, and even become a safety hazard. Power transmission carries high voltage and high current, which is also a place that easily causes fires. Therefore, halogen-free low-smoke flame-retardant cables have been widely used in recent years, especially in some public places with higher fire safety requirements, and have been well received by users at home and abroad. However, with the widespread use of halogen-free low-smoke flame-retardant cables, new problems have also appeared. Because the flame retardants added to the halogen-free low-smoke flame-retardant materials currently used are mostly hydrogen hydroxide such as magnesium h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/18H01B7/02H01B3/44H01B7/282H01B7/295
CPCY02A30/14
Inventor 吴善同
Owner 四川塔牌电缆集团有限责任公司
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