CN101593573A

CN101593573A - Fireproof cable

Info

Publication number: CN101593573A
Application number: CNA2009100320282A
Authority: CN
Inventors: 赵英荣
Original assignee: Jiangsu Dongfeng Cable Co Ltd
Current assignee: Jiangsu Dongfeng Cable Co Ltd
Priority date: 2009-07-07
Filing date: 2009-07-07
Publication date: 2009-12-02

Abstract

The invention discloses a kind of fireproof cable, comprise oversheath and the cable core that constitutes by inner core, cable core is enclosed within the oversheath, and inner core comprises that described oversheath is a corrugated stainless steel by many stranded inner wires that form of copper cash and wrapped mica tape insulation on the inner wire outer surface.Advantage of the present invention is a good electric property, and product flexibility better is convenient to install and is laid; Mechanization production in enormous quantities; Can improve the bending property of cable, simultaneously the delivery length of cable is unrestricted, and the cable of different length can be provided as required; Can meet the instructions for use of various fireproof occasions fully; The fusion temperature height of corrugated stainless steel tube can not burn cable itself, even when flame burns on cable, cable can also continued power, and the price of corrugated stainless steel tube is more much lower than copper product, can save cost again.

Description

Fireproof cable

Technical field

The present invention relates to a kind of electric wire, is a kind of fireproof cable specifically.

Background technology

Along with the development of society, the fire prevention of skyscraper, important building is more and more paid attention to by people, for improving the fire safety grade, can adopt flame retardant cable or fire-resisting cable generally speaking, to requiring higher building,, can select the magnesium oxide insulated cable for use as large-scale museum.

Flame retardant cable just will add fire retardant in insulating material and the sheath material, so the used insulating material of flame retardant cable itself still can burn, in case breaking out of fire, so-called flame retardant cable still can be lighted raging flames, and this fault such as puncture the time also may appear and initiation fire in cable in operation.

Fire-resisting cable is to have wrapped one deck fire-resistant isinglass belt on the conductor of cable, cable still can be powered a period of time under the situation of fire like this, elevator just can not cut off the power supply at once, thereby for the personnel escape strives for one period unusual quality time, very short during this period of time, fire-resisting cable also can puncture and loses the transmission of electricity function afterwards; Used insulation, sheath and the packing material of this fire-resisting cable all is combustible, thereby cable itself is easy to burning.

The inner wire of magnesium oxide insulated cable is real core copper bar, oversheath is a smooth copper, the centre is the insulation of mineral matter magnesium oxide, because of this cable itself does not contain any combustible, so can not burn, simultaneously this cable is in that have under the situation of flame combustion can also continued power, because constituting the two kinds of material copper and the magnesium oxide of cable all is the very high material of heatproof, so this cable has good fire performance, but this cable has several more fatal weakness, i.e. manufacturing process complexity, can not produce the long finished cable of length, not flexible too firmly, use inconvenience.The manufacturing process of this cable is: the sleeve pipe that at first magnesium oxide is pressed into several centimeter length; count difference according to cable core; the cover pipe orifice is counted difference; as 1 core; 2 cores; 3 cores; 4 core cables etc.; secondly with magnesium oxide sleeve pipe sintering; the magnesium oxide sleeve pipe just has certain rigidity like this; be convenient to the next procedure suit; again with magnesium oxide sleeve pipe and copper bar; it is the copper bar that the copper pipe cover gets up to form inner wire, and the centre is the magnesium oxide insulation, and the outside is the construction of cable of copper pipe protection; and then multiple tracks cold drawing; whole cable is by drawing-down elongation gradually, and magnesium oxide forms compact texture, and annealing at last makes the cable deliquescing.Because copper pipe, the copper bar can not be oversize, oversize can't finish suit and drawing, so finished cable is all very short, though annealed processing, because inner wire is that copper bar, outer conductor are smooth copper, the centre is hard magnesium oxide, so it is not cable is still stone, flexible.

Summary of the invention

Goal of the invention: the objective of the invention is provides a kind of more reasonable structure, withstand high temperatures flame, is easy to bending and lays fireproof cable easily in order to overcome the deficiencies in the prior art.

Technical scheme: in order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of fireproof cable, comprise oversheath and the cable core that constitutes by inner core, cable core is enclosed within the oversheath, inner core comprises that described oversheath is a corrugated stainless steel by many stranded inner wires that form of copper cash and wrapped mica tape insulation on the inner wire outer surface.

Inner wire is many copper wires among the present invention, and oversheath is a corrugated stainless steel, all is the soft junction structure, and the cable bending property is fine, easy to use and also can make very long, the top-grade building that can satisfy the different length requirement uses; Oversheath adopts corrugated stainless steel, because corrugated stainless steel is a nonmagnetic substance, meets the electromagnetic field requirement of cable, and stainless fusing point reaches more than 1500 ℃, is higher than 1083 ℃ of the fusing points of copper pipe far away, and general flame burns not to be changed; Mica is excellent insulating material, its insulation property are better than magnesium oxide far away, and its fusing point is more than 1000 ℃, can satisfy cable fully and under the situation of flame calcination, continue to keep the good insulation performance performance, thereby realize that cable is in the function that can also keep it in the calcination of flame, continues electric energy transmitting.

Fireproof cable of the present invention is divided into single core fireproof cable and multicore fireproof cable, and wherein single core fireproof cable is meant that described cable core is made of single inner core; The multicore fireproof cable is meant that described cable core forms by the inner core more than two or two is stranded, between described cable core and oversheath, be provided with the mica tape winding layer, at equal filling glass silk and cable core and glass fiber are tightened between described inner core and the inner core and between inner core and the mica tape winding layer by the mica tape winding layer.

Beneficial effect: compared with prior art, advantage of the present invention is a good electric property, and product flexibility better is convenient to install and is laid; Compare with conventional oxidation magnesium insulated cable, do not have hand process such as loaded down with trivial details magnesium oxide sleeve pipe compacting, sintering, suit, efficient improves greatly, and product quality is easy to guarantee, mechanization production in enormous quantities; Can improve the bending property of cable, simultaneously the delivery length of cable is unrestricted, and the cable of different length can be provided as required; Can meet the instructions for use of various fireproof occasions fully; The fusion temperature height of corrugated stainless steel tube can not burn cable itself, even when flame burns on cable, cable can also continued power, and the price of corrugated stainless steel is more much lower than copper product, can save cost again.

Description of drawings

Fig. 1 is the structural representation of single core fireproof cable among the present invention.

Fig. 2 is the structural representation of multicore fireproof cable among the present invention.

Embodiment

The present invention is described in further detail below in conjunction with accompanying drawing.

Fireproof cable of the present invention comprises single core fireproof cable and multicore fireproof cable.

Figure 1 shows that single core fireproof cable, it comprises corrugated stainless steel oversheath 1 and the cable core that is made of inner core, cable core is enclosed within the corrugated stainless steel oversheath 1, inner core comprises inner wire 2 and mica tape insulation 3, inner wire 2 is by many stranded the forming of copper cash, and it is 3 wrapped on the outer surface of inner wire 2 that mica tape insulate.

Figure 2 shows that the multicore fireproof cable, it comprises corrugated stainless steel oversheath 1, by the stranded cable core that forms of the inner core more than two or two, preferred three inner cores, cable core is enclosed within the corrugated stainless steel oversheath 1, inner core comprises inner wire 2 and mica tape insulation 3, inner wire 2 is by many stranded the forming of copper cash, it is 3 wrapped on the outer surface of inner wire 2 that mica tape insulate, between described cable core and corrugated stainless steel oversheath 1, be provided with mica tape winding layer 4, at equal filling glass silk 5 between described inner core and the inner core and between inner core and the mica tape winding layer 4, and cable core and glass fiber are tightened with mica tape winding layer 4.

The above only is a preferred implementation of the present invention, should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the principle of the invention, can also make some modification and improvement, and these also should be considered as belonging to protection scope of the present invention.

Claims

1, a kind of fireproof cable, it is characterized in that: comprise oversheath (1) and the cable core that constitutes by inner core, cable core is enclosed within the oversheath (1), inner core comprises that described oversheath (1) is a corrugated stainless steel by many stranded inner wires that form of copper cash (2) and wrapped mica tape insulation (3) on inner wire (2) outer surface.

2, fireproof cable according to claim 1 is characterized in that: described cable core is made of single inner core.

3, fireproof cable according to claim 1 is characterized in that: described cable core has the inner core more than two or two.

4, fireproof cable according to claim 3, it is characterized in that: between described cable core and oversheath (1), be provided with mica tape winding layer (4), at equal filling glass silk (5) and cable core and glass fiber (5) being tightened between described inner core and the inner core and between inner core and the mica tape winding layer (4) by mica tape winding layer (4).