CN202796212U

CN202796212U - Anti-corrosion fireproof cable

Info

Publication number: CN202796212U
Application number: CN 201220454120
Authority: CN
Inventors: 郑飞
Original assignee: Fuzhou Tongerda Electric Wire & Cable Co Ltd
Current assignee: Fuzhou Tongerda Electric Wire & Cable Co Ltd
Priority date: 2012-09-07
Filing date: 2012-09-07
Publication date: 2013-03-13
Anticipated expiration: 2022-09-07

Abstract

The utility model discloses an anti-corrosion fireproof cable. The anti-corrosion fireproof cable comprises a conductor located at the center of the cable, wherein a water-repellent foam asbestos band is wrapped outside the conductor, and an embossed metal sheath is arranged on an outermost layer. The anti-corrosion fireproof cable is suitable for an occasion with humid service environment and high fireproof requirement and has the advantages of being fireproof, high-temperature-resisting, stable in insulating layer, simple in production, low in cost and convenient to package and transport, being not easily damaged and corroded, and the like.

Description

A kind of anticorrosion fireproof cable

Technical field

The utility model relates to a kind of power cable, is specially a kind of anticorrosion fireproof cable.

Background technology

During breaking out of fire, some equipment also need the normal operation of electric power system, but existing cable is high temperature resistant require limited, when temperature reaches one regularly, insulating barrier namely may destroy between the cable phase line, even cable fused, and then power consumption equipment can't be run well, and has influence on the needs of the on-the-spot common people's escape and fire fighting.There is the insulating barrier of the fireproof cable of product to adopt fire-resistant inorganic constituents on the market now, such as magnesium chloride etc., to improve the fire resistance of cable, but, moisture in the easy absorbing air of magnesium chloride and so that its insulation property lost efficacy, therefore there is scheme to propose to adopt seamless steel pipe to carry out armouring, but the seamless steel pipe cost is high, increased the difficulty of processing of long cable, a large amount of stub cables connect, and can consume the more time, cost, have increased the possibility of cable fault, simultaneously, the still inconvenience of suction problem at cable two ends improves.

The utility model content

Technical problem to be solved in the utility model is for cable higher fire-resistant requirement and waterproof requirement, provides a kind of more economical, processes easier anticorrosion fireproof cable.

Technical scheme:

The utility model provides a kind of anticorrosion fireproof cable scheme, and it will overcome the deficiency of the traditional fireproof cable in the background technology.

Concrete scheme is as follows:

A kind of anticorrosion fireproof cable, it comprises conductor and the outer field metallic sheath that is positioned at cable center, wherein, conductor also is provided with drain insulating layer by a kind of composition the in single cord or concentric lay conductor or set twisted wire or the composite twisted wire between conductor and outer field metallic sheath.

In one preferred embodiment, described drain insulating layer is that the wrapped center conductor of hydrophobic foam asbestos forms.Asbestos fibre is a kind of fire-resistant mineral fibres, and adding increases corresponding pore man-hour, makes it have better heat insulation effect, simultaneously this material is carried out special processing and can make it have hydrophobic property, to avoid it to a large amount of absorptions of moisture in air.Adopt the wrapped formation drain insulating layer of hydrophobic foam asbestos yarn structure, played insulating effect on the one hand, also can realize on the other hand the heat insulation and anti-absorbent function of this layer.

In one preferred embodiment, described metallic sheath is the metallic copper sheath of embossing or the stainless steel sheath of embossing, and described copper sheath thickness is 0.4～0.8mm, and described stainless steel sheath thickness is 0.25～0.4mm.

In one preferred embodiment, described metallic sheath also is extruded with the anticorrosion sheath that the low smoke, zero halogen polyolefin consists of outward.

The technical program is compared with background technology, and it has following advantage:

1, increases drain insulating layer, not only guaranteed between the conductor and the electrical insulating property between conductor and metallic sheath, to effectively slow down simultaneously this layer to the absorption of moisture in the surrounding air, and avoid because drain insulating layer absorbs moisture in a large number its insulating properties being reduced;

2, the outer wrapped metallic sheath of drain insulating layer, on the one hand because melting point metal is high, play useful flameproof effect, on the other hand, metallic sheath prevents to a certain extent that also outside aqueous vapor is on the impact of drain insulating layer, metallic sheath extrudes the anticorrosion sheath that the low smoke, zero halogen polyolefin consists of outward, can prevent that again metal from being corroded by the external world, plays a protective role;

3, drain insulating layer is litaflex, owing to wherein contain bubble, has reduced its conductive coefficient, has reduced heat transfer in the cable fire, and then has prolonged the guard time of cable.

Description of drawings

Fig. 1 is the structural representation of embodiment 1.

Fig. 2 is the structural representation of embodiment 2.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model done further specifying,

A kind of anticorrosion fireproof cable, from inside to outside, it comprises the conductor that is positioned at cable center, drain insulating layer, fiber-filled and outermost metallic sheath and anticorrosion sheath.In one preferred embodiment, the conductor that is positioned at the center is comprised of single cord 1, and the single cord 1 outer synthetic mica tape 2 that is surrounded with forms insulated wire cores, has guaranteed between the compactness and single cord of cable core the electric insulation level between single cord and copper sheath.Three bar insulation core twisted synthesizing cables, wrapped hydrophobic foam asbestos form drain insulating layer 4 on cable core, asbestos fibre is a kind of fire-resistant mineral fibres, adding increases corresponding pore man-hour, makes it have better heat insulation effect, to improve the fireproofing of cable performance, simultaneously this material being carried out special processing can make it have hydrophobic property, to avoid it to a large amount of absorptions of moisture in air, prevent that drain insulating layer 4 insulating properties are destroyed, and then prevent that cable is corroded.

Cable core adopts alkali-free glass fibre gasket for packing 3 to fill simultaneously, further guarantee the insulation property of 5 of cable conductor and copper sheaths, and cable profile roundness satisfies the regulation requirement, adopt again the vertical bag of T2 soft copper band, welding, form copper sheath 5, and copper sheath 5 is carried out embossing process, being the fire protecting performance of assurance copper sheath and the flexibility of cable, the copper sheath THICKNESS CONTROL is at 0.4mm.

Extrude again the anticorrosion sheaths 6 of an employing low smoke, zero halogen polyolefine material outside the copper sheath 5, be corroded to prevent copper sheath 5 from directly contacting extraneous, obtain thus final products and also pack.

Another preferred embodiment as shown in Figure 2, the conductor at center is comprised of set twisted wire 1, the many stranded formation set of single strand of copper wire twisted wires 1, the set twisted wire 1 outer synthetic mica tape 2 that is surrounded with forms insulated wire cores, and then between the compactness that has guaranteed cable core and different cores and the electric insulation level of 5 of core and stainless steel sheaths, four bar insulation core twisted synthesizing cables, wrapped hydrophobic foam asbestos yarn forms drain insulating layer 4 on cable core, drain insulating layer 4 not only can play fire retardation, simultaneously it can effectively prevent rapidly diffusion and cause destruction to cable of heat, it also can well guarantee the drying of cable inside, prolongs the useful life of cable.

What the middle conductor sectional area was less is the neutral line 7, other three is phase line 8, phase line is around the stranded formation cable core of the neutral line, cable core adopts alkali-free glass fibre gasket for packing 3 to fill, further guarantee the insulation property of 5 of cable conductor and stainless steel sheaths, and cable profile roundness satisfies the regulation requirement.The outer stainless steel parcel cable that adopts, form stainless steel sheath 5, and stainless steel sheath 5 is carried out embossing process, for guaranteeing that the cable fire-proof performance is with flexible, the stainless steel sheath THICKNESS CONTROL is at 0.25mm, the stainless steel sheath 5 outer anticorrosion sheaths 6 that extrude again an employing low smoke, zero halogen polyolefine material obtain final products and packing.

The above only is the utility model preferred embodiment, so can not limit according to this scope that the utility model is implemented, the equivalence of namely doing according to the utility model claim and description changes and decorates, and all should belong in the scope that the utility model contains.

Claims

1. anticorrosion fireproof cable, it comprises conductor and the outer field metallic sheath that is positioned at cable center, it is characterized in that described conductor also is provided with drain insulating layer by a kind of composition the in single cord or concentric lay conductor or set twisted wire or the composite twisted wire between described conductor and outer field metallic sheath.

2. anticorrosion fireproof cable according to claim 1 is characterized in that described drain insulating layer is that the wrapped center conductor of hydrophobic foam asbestos forms.

3. anticorrosion fireproof cable according to claim 1 and 2 is characterized in that described metallic sheath is the metallic copper sheath of embossing or the stainless steel sheath of embossing, and described copper sheath thickness is 0.4～0.8mm, and described stainless steel sheath thickness is 0.25～0.4mm.

4. anticorrosion fireproof cable according to claim 1 and 2 is characterized in that described metallic sheath also is extruded with the anticorrosion sheath that the low smoke, zero halogen polyolefin consists of outward.