CN201057590Y

CN201057590Y - Non-halogen type low-smoke flame-proof flexible cable for coal mine

Info

Publication number: CN201057590Y
Application number: CNU2007200367266U
Authority: CN
Inventors: 陆文荣; 胡光政; 李高强; 李万松
Original assignee: ANHUI HUALING CABLE GROUP Co Ltd
Current assignee: ANHUI HUALING CABLE GROUP Co Ltd
Priority date: 2007-04-24
Filing date: 2007-04-24
Publication date: 2008-05-07
Anticipated expiration: 2017-04-24

Abstract

A halogen-free low-smoke flame retardant flexible cable for coal mine is provided, which comprises a power cable core, a pilot core and a sheath, and is characterized in that: after being twisted, three power cable cores are extruded in an inner sheath; the cable core consists of a conductor core wire, a semi-conductive tape layer, an insulation layer and a shielding layer. Three copper conductor pilot cores with symmetrical centers and the semi-conductive tape layer wrapped out of the pilot cores are arranged between the inner sheath and an outer sheath. The flexible cable has high-strength temperature resistance grades, is non-flammable and does not spread combustion, which can not produce halogen hydride acidic gas even having low smoke when inflaming.

Description

Colliery halogen-free type low-smoke and flame retardant flexible cable

One, technical field

The utility model relates to a kind of mining cable, particularly colliery flame retardant cable, and specifically a kind of colliery is with halogen-free type low-smoke and flame retardant flexible cable.

Two, background technology

The mining flame-retardant flexible cable is mainly used in being electrically connected and being connected of similar devices between phase shifting transformer under high-pressure side and regulator cubicle or the coal mine, electrical control cabinet and the equipment.The great serious accident in colliery occurs repeatedly in recent years, and safety of coal mines has been listed in the emphasis that national security is produced, and therefore, the colliery more and more is subject to people's attention one of equipment with the quality of cable.Purpose is to reduce casualties and property loss when having an accident under mine as far as possible.The present mining cable that uses in order to reach fire-retardant purpose, uses halogen elements such as chloride, bromine, its amount of being fuming very big with can enough become grievous injury to personnel, equipment.LSOH anti-flaming type mining cable can effectively improve above defective.The application of this type of cable under coal mine, life, the property loss under the ore deposit has great importance to the safety in production in colliery and when reducing mine disaster to greatest extent.Simultaneously, produce that to contain the environmental pollution that halogen element rubber causes also very big, the popularization of this type of cable can reduce or cancel the production of Halogen rubber, the promotion environmental protection.

Three, summary of the invention

The utility model is intended to provide for the colliery a kind of low-smoke and flame retardant flexible cable of excellent performance, technical problem to be solved is to use Halogen material preparation low-smoke fireproof cable, has performances such as oil resistant, heatproof, wear-resisting, withstand voltage, high-low temperature resistant, chemically-resistant solvent and softness simultaneously.

This cable selects halogen-free type low-smoke and flame retardant EVM mixing of rubber for use, be ethylene-vinyl acetate copolymer processing insulating barrier and interior oversheath, and press the MT818-1999 standard code, the insulation resistance when having determined the insulation thickness of cable and 20 ℃.

The conductor of this cable processing dynamics heart yearn and supervision core adopts tin annealed copper wire, and its performance meets the requirement of the 5th kind of zinc-plated flexible conductor of GB/T3956-1997.

The insulation screen of this cable power cable core is designed to wrapped semi-conductive cloth tape and metal/fibrage shielded shielding form that combines, and wire sheathing can also the double as ground wire.

This halogen-free type low-smoke and flame retardant flexible cable comprises the power cable core, monitors core and sheath, its structure as shown in Figure 1, be extruded in the inner sheath 5 after three power cable cores are stranded, described cable core is made of the stranded heart yearn 1 of many conductors and the semi-conductive tape 2 that extrudes on it and insulating barrier 3 and the insulating barrier 3 outer screens 4 that extrude; Between inner sheath 5 and oversheath 8, be provided with three centrosymmetric copper conductors and monitor core 6 and monitor wrapped semiconductive belt 7 outside the core 6 that the material of inside and outside sheath and insulating barrier all adopts ethene-vinyl acetate rubber.

The advantage that the utlity model has:

1, the insulation temperature resistant grade can reach 100 ℃, improves current-carrying capacity of cable and heat resistanceheat resistant breakdown capability;

2, oxygen index (LOI) reaches 38%; Higher 4 percentage points than current CR rubber commonly used 34%;

3, poison exponent (NEC 713) is 0.9, and CM rubber is 15.8, and CSM rubber is 14.2, and CR rubber is 20.3, and toxicity numerical value is very low;

4, smoke density: no flame is 150; It is 135 that flame is arranged, and CR is respectively 550 and 485;

5, flue gas corrosion (VDE0472) pH value is 3.8, and CR, CSM and CM are respectively 1.8,2.1 and 2.1;

6, conductivity (μ s/cm) is 64, and CR, CSM and CM are respectively 5340,2960 and 4810.

The beneficial effects of the utility model are that the amount of being fuming is low during burning, does not produce halogen acid gas, and cable has not flame-retarding power energy.Other performances are close with existing similar cable.

Four, description of drawings

Shown in Figure 1 is rated voltage 6/10kV and following metallic shield monitoring type colliery with mobile class flame-retardant flexible electric cable structural representation.

Shown in Figure 2 is the structural representation that monitors core 6.

Five, embodiment

In conjunction with Fig. 1, the utility model non-limiting examples is described below:

Heart yearn 1 adopts many copper conductor lay configuration, outside conductor core wire 1, extrude semi-conductive tape 2 and EVM mixing of rubber and constitute insulating barrier 3, screen 4 is arranged outside insulating barrier 3, the shielding construction that adopts wrapped semi-conductive tape and braided metal/fiber to combine, metal and fiber lay respectively at ingot up and down, and every ingot fine rule overall width is identical.Three cable cores are after stranded, extrude inner sheath 5, inner sheath 5 be outside equipped with three centrosymmetric, be that phase angle difference is that 120 ℃ copper conductor monitors core 6, wrapped semiconductive belt 7 outside monitoring core 6, extrude oversheath 8 at last, inner sheath 5 and oversheath 8 all are low-smoke non-halogen flame-retardant EVM elastomeric compound.

Claims

1. a colliery is with halogen-free type low-smoke and flame retardant flexible cable, comprise the power cable core, monitor core and sheath, it is characterized in that: be extruded in after three power cable cores are stranded in the inner sheath (5) with the ethene-vinyl acetate rubber processing, described cable core is by conductor core wire (1), semiconductive belt (2), insulating barrier (3) and screen (4) with the ethene-vinyl acetate rubber processing constitute, and be provided with three centrosymmetric copper conductors and monitor core (6) and monitor wrapped semiconductive belt (7) outside the core (6) between inner sheath (5) and same oversheath (8) with the ethene-vinyl acetate rubber processing.