CN203026244U - Halogen-free low-smoke flame-retardant fire-proof anti-crack power cable - Google Patents
Halogen-free low-smoke flame-retardant fire-proof anti-crack power cable Download PDFInfo
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- CN203026244U CN203026244U CN 201220716119 CN201220716119U CN203026244U CN 203026244 U CN203026244 U CN 203026244U CN 201220716119 CN201220716119 CN 201220716119 CN 201220716119 U CN201220716119 U CN 201220716119U CN 203026244 U CN203026244 U CN 203026244U
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Abstract
The utility model relates to a halogen-free low-smoke flame-retardant fire-proof anti-crack power cable. The halogen-free low-smoke flame-retardant fire-proof anti-crack power cable is characterized in that an insulating wire core is formed by sequentially lapping a fire-proof mica tape (2) and an extruded crosslinked polyethylene insulating layer (3) outside a copper conductor (1), a cable core is formed by twisting three insulating wire cores, clearances among the insulating wire cores are filled with filling ropes (4), and two layers of halogen-free low-smoke flame-retardant wrapping tapes (5), a thermoplastic polyolefin elastomer inner sheath (6) and a halogen-free low-smoke flame-retardant polyolefin outer sheath (7) are sequentially coated outside the cable core. According to the cable, the inner sheath is extruded between the outer sheath and the cable core, stress generated when the cable is bent or retracted can not be directly transferred onto the outer sheath, and the inner sheath bears the stress of the cable, so that the outer sheath can be protected so as to be effectively prevented from cracking. The inner sheath is made of a thermoplastic polyolefin elastomer, thus having both excellent toughness and good machinability, and being high in tensile strength and breaking elongation, as well as good in impact strength.
Description
Technical field
The utility model relates to a kind of power cable, particularly the fire-resistant cracking resistance power cable of a kind of LSOH anti-flaming.
Background technology
Early 1970s, developed flame retardant cable abroad, obtaining major progress aspect the prevention propagation of flame, but traditional flame retardant cable is mainly to adopt the halogen containing material such as flame-proof polyvinyl chloride, neoprene and chlorosulfonated polyethylene to reach as the sheath of cable the purpose that suppresses propagation of flame.These flame retardant cables can discharge a large amount of corrosive gass and dense smoke in burning, the smog block vision is brought certain difficulty to the scene of fire escape; Poisonous gas suffocates the people, jeopardizes people's life security.The danger that the danger of this potential " secondary disaster " is more directly burnt is larger.Along with the progress of technology, the critical facilitys such as the place that some spaces are airtight, personnel are intensive such as subway, skyscraper and naval vessel, nuclear power station are more and more higher to the requirement of safety and reliability.Therefore, the cable of new generation that has low cigarette, Halogen, fire resistance in the urgent need to exploitation.
And because the halogen-free and low-smoke flame-retardant polyolefin material adds a large amount of Al (OH) 3, Mg (OH) 2 fire-retardant inorganic material in the course of processing, make its electromechanical properties and processing characteristics all become relatively poor, cause the condensate strength decreased, percentage elongation and compliance also reduce simultaneously.Tear resistance and splitting resistance inadequate natural endowment.In the cable laying process, sheath often the cracking situation can occur especially.Cable can form stress and concentrate when bending, cause sheath to be subject to stress and concentrate impact and ftracture, thereby cable is shortened useful life, and product reliability reduces, and brings certain difficulty for normal the use.And then affected the application of halogen-free, low-smoke, flame.
The utility model content
The purpose of this utility model just is to provide a kind of can protect sheath, extends cable useful life, strengthens the fire-resistant cracking resistance power cable of LSOH anti-flaming of product reliability.
The purpose of this utility model is achieved through the following technical solutions:
The fire-resistant cracking resistance power cable of a kind of LSOH anti-flaming, its design feature is: by copper conductor outward successively wrapped fire-resistant isinglass belt, extrude crosslinked polyetylene insulated layer and consist of insulated wire cores, three thoroughly do away with the mutually stranded formation cable core of edge core, space between described insulated wire cores adopts gasket for packing to fill, and described cable core is coated with two-layer LSOH anti-flaming band, thermoplastic polyolefin elastomer inner sheath and halogen-free and low-smoke flame-retardant polyolefin oversheath outward successively.
The utility model design feature also is: described gasket for packing is the low smoke, zero halogen glass cord.
Advantage of the present utility model is mainly reflected in:
The utility model cable extrudes one deck inner sheath between oversheath and cable core, cable is when crooked or flexible, and the stress that produces is not directly delivered on oversheath, bears cable stress by inner sheath, thereby the protection oversheath can effectively prevent the oversheath cracking.This inner sheath material is thermoplastic polyolefin elastomer simultaneously, and the toughness that it has existing excellence has again good processability, and tensile strength and elongation at break all very high, have good impact strength.
Description of drawings
Fig. 1 is the utility model structural representation.
Number in the figure: 1 copper conductor, 2 fire-resistant isinglass belts, 3 crosslinked polyetylene insulated layers, 4 gasket for packings, 5 LSOH anti-flaming bands, 6 thermoplastic polyolefin elastomer inner sheaths, 7 halogen-free and low-smoke flame-retardant polyolefin oversheaths.
Technical solutions of the utility model are described further by embodiment below in conjunction with accompanying drawing.
Embodiment
As shown in Figure 1, cable is comprised of copper conductor 1, fire-resistant isinglass belt 2, crosslinked polyetylene insulated 3, gasket for packing 4, LSOH anti-flaming band 5, thermoplastic polyolefin elastomer inner sheath 6 and halogen-free and low-smoke flame-retardant polyolefin 7.
In concrete enforcement, copper conductor 1 adopts lay configuration, is surrounded with fire-resistant isinglass belt 2 on copper conductor 1, and crosslinked polyetylene insulated layer 3 is extruded on mica tape, and adopts vapor crosslinking; Form insulated wire cores, three thoroughly do away with the edge core twists together the formation cable core, space low smoke, zero halogen gasket for packing 4(glass cord between insulated wire cores) fill, and wrapped two-layer LSOH anti-flaming band 5, be extruded with thermoplastic polyolefin elastomer inner sheath 6 on band, extrude at last low smoke, zero halogen polyolefin jacket 7 outside inner sheath 6.The toughness that this cable has existing excellence has again good processability, and tensile strength and elongation at break all very high, have good impact strength.Can effectively eliminate the cable internal stress, extend cable useful life.
Claims (2)
1. fire-resistant cracking resistance power cable of LSOH anti-flaming, it is characterized in that: by the outer wrapped fire-resistant isinglass belt (2) successively of copper conductor (1), extrude crosslinked polyetylene insulated layer (3) and consist of insulated wire cores, three thoroughly do away with the mutually stranded formation cable core of edge core, space between described insulated wire cores adopts gasket for packing (4) to fill, and described cable core is coated with two-layer LSOH anti-flaming band (5), thermoplastic polyolefin elastomer inner sheath (6) and halogen-free and low-smoke flame-retardant polyolefin oversheath (7) outward successively.
2. the fire-resistant cracking resistance power cable of a kind of LSOH anti-flaming according to claim 1, it is characterized in that: described gasket for packing (4) is the low smoke, zero halogen glass cord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220716119 CN203026244U (en) | 2012-12-21 | 2012-12-21 | Halogen-free low-smoke flame-retardant fire-proof anti-crack power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220716119 CN203026244U (en) | 2012-12-21 | 2012-12-21 | Halogen-free low-smoke flame-retardant fire-proof anti-crack power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203026244U true CN203026244U (en) | 2013-06-26 |
Family
ID=48650210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220716119 Expired - Fee Related CN203026244U (en) | 2012-12-21 | 2012-12-21 | Halogen-free low-smoke flame-retardant fire-proof anti-crack power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203026244U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109438928A (en) * | 2018-10-09 | 2019-03-08 | 江阴凯博通信科技有限公司 | Low smoke halogen-free sheath material and its production technology |
-
2012
- 2012-12-21 CN CN 201220716119 patent/CN203026244U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109438928A (en) * | 2018-10-09 | 2019-03-08 | 江阴凯博通信科技有限公司 | Low smoke halogen-free sheath material and its production technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20151221 |
|
| EXPY | Termination of patent right or utility model |