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Halogen-free low-smoke and flame-retardant crosslinked polyolefin insulating environment-friendly cable

A low-smoke, flame-retardant, cross-linked technology, which is applied in the direction of insulated cables, insulators, insulated conductors, etc., can solve the problems of long-distance cable damage, achieve the effects of reducing contact area, reducing loss, and preventing diffusion

Active Publication Date: 2017-09-05
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 and flame-retardant crosslinked polyolefin insulating environment-friendly cable
  • Halogen-free low-smoke and flame-retardant crosslinked polyolefin insulating environment-friendly 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 insulating layer 2 is provided outside the cable core 1, and a water-blocking filling layer is arranged outside the insulating layer 2 in turn. 3. Tape 4 and the 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 51 and a first water-blocking ring 52, and the first flame-resistant ring 51 is Alternately arranged and connected with the first water blocking ring sleeve 52 through glue connection

Embodiment 2

[0029] Further improvement 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, and the second inner sheath 6 is arranged in the first inner sheath Outside the sheath 5 , the second inner sheath 6 includes a second flame-retardant ring 61 and a second group of water rings 62 . The second flame-retardant rings 61 and the second water-blocking rings 62 are alternately arranged and connected along the long axis of the cable, the second flame-resistant rings 61 and the first flame-resistant rings 51 have the same axial length, and the second The set of water blocking rings 62 and the first water blocking replacement sleeve 61 have the same axial length; The collar 62 is in contact with the first flame-retardant collar 51 .

Embodiment 3

[0031] Such as figure 2As shown, further improvement on the basis of Example 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 the main diameter of the first flame-retardant ring sleeve 51 The outer diameter of the collar section, the inner diameter of the interface end of the first water blocking collar 52 is greater than the inner diameter of the main collar section of the first water blocking collar 52, and the interface end of the first water blocking collar 52 is set on the first flame retardant collar 51; 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 water-blocking ring sleeve 62 is larger than the second wa...

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Abstract

The invention discloses a halogen-free low-smoke flame-retardant cross-linked polyolefin insulated environmental protection cable, which comprises a three-phase cable core, an insulating layer is arranged outside the cable core, and a water-blocking filling layer and a wrapping tape are arranged on the outside of the insulating layer in sequence. and an inner sheath, the inner sheath includes a first inner sheath, the first inner sheath includes a first flame retardant ring and a first water blocking ring, and the first inner sheath is in the direction of the long axis of the cable. The flame retardant ring sleeve and the first water blocking ring sleeve are alternately arranged and connected. It can effectively block moisture from dipping along the cable axis, affect the electrical performance of the cable, and reduce losses at the same time.

Description

technical field [0001] The invention relates to a cable, in particular to a halogen-free, low-smoke, flame-retardant cross-linked polyolefin insulated and environment-friendly cable. Background technique [0002] If the cable produces a large amount of toxic gas and smoke during the burning process, it will have a great impact on the escape of personnel, and even become a safety hazard. Power transmission carrying high voltage and high current is also a place that is easy to cause fire. Therefore, halogen-free low-smoke flame-retardant cables have been widely used in recent years, especially in some public places with high 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 emerged. Because most of the flame retardants added to the currently used halogen-free low-smoke flame-retardant materials are hydrogen such as magnesium hydroxide or a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/18H01B7/02H01B3/44H01B7/282H01B7/295
CPCY02A30/14H01B7/1875H01B3/441H01B7/0225H01B7/2825H01B7/295
Inventor 吴善同
Owner 四川塔牌电缆集团有限责任公司
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