CN203038695U

CN203038695U - Flexible fireproof multi-core cable

Info

Publication number: CN203038695U
Application number: CN 201220695293
Authority: CN
Inventors: 储科明; 夏亚芳; 陈晓军; 唐海伟
Original assignee: Wuxi Jiangnan Cable Co Ltd
Current assignee: Wuxi Jiangnan Cable Co Ltd
Priority date: 2012-12-17
Filing date: 2012-12-17
Publication date: 2013-07-03
Anticipated expiration: 2022-12-17

Abstract

The utility model discloses a flexible fireproof multi-core cable comprising a cable core formed through twisting of a plurality of insulation cores. The insulation core consists of a conductor, a mica tape, an insulation layer and an inner sheath layer, wherein the mica tape is wrapped outside of the conductor, the insulation layer and the inner sheath layer are successively extruded outside of the mica tape. A filling layer is mounted in a gap of the cable core. An insulation tape is wrapped outside of the cable core and an oversheath is extruded outside of the cable core and serves as the outmost layer. The flexible fireproof multi-core cable is provided with a polyolefin oversheath layer which is higher in flexibility, so the cable is easier to bend compared with a metal sheath layer; processing and laying of the cable are convenient; and acid resistance, alkali resistance and corrosion resistance performance are excellent. In addition, the insulation layer is extruded outside of the mica tape, compared with a conventional cable requiring metal processing, the multi-core cable has a protective effect without mica powder peeling. A ceramic fireproof silicone-rubber inner sheath layer arranged on the cable can form a hard ceramic casing, and the hard ceramic casing has good insulation performance. Furthermore, the ceramic casing can very effectively block flame continuous burning and guarantee smooth communication and power lines in fire.

Description

A kind of fire resistant flexible multicore cable

Technical field

The utility model relates to the electric wire field, specifically refers to a kind of fire resistant flexible multicore cable.

Background technology

Because densely populated in the building, except its reach safely fire protection equipment must be complete, in case breaking out of fire, its circuit of controlling systems such as electric power, supervision, guiding and alarm must can be kept normal function.Fireproof cable plays epochmaking effect in the building of modern city, existing fireproof cable often adopts BTTZ magnesium oxide mineral insulated cable, its manufacturing process falls behind complicated, conductor adopts real core copper bar, and sheath is drawing copper tubes, therefore, cable is rigidity, flexibility is poor, is difficult to bending, and it is bigger to process, lay difficulty.Because oversheath adopts drawing copper tubes to form, and limited by plant area, drum length of cable is limited, need increase transition joint during use, contact resistance increases, and has reduced the efficient of transmission of electricity, increase power transmission failure hidden danger point, be difficult to meet related specifications requirements such as " Code for design of cables of electric works ".The magnesium oxide mineral insulated cable is processed external diameter and is limited, and is difficult to adopt multicore cable.

Chinese patent CN200410083982.1 discloses " a kind of flexible fire-proof cable and production technology thereof and production equipment ", its primary structure is: " one group of metal core is evenly distributed; its vertically by the mica tape insulating barrier isolate mutually, and parcel; the outside is the coated metal band again; ferrule is to closing up and by weld seam sealing longitudinally; form flexible fire-proof cable, if when requiring cable that better bending property is arranged, rolling texture on smooth metallic sheath." during the burning of this structural cable the hardening of mica sintering can play the effect of insulation; no matter be synthetic mica tape, phlogopite band, white clouds master tape or other mineral insulation bands; its processing method all is to utilize adhesive to paste mica powder or mineral insulation powder; therefore harder; close up at metallic sheath, vertically in the process of metal working such as welding, rolling texture; mica powder all very easily peels off, and has all lost the function that insulate as long as exist to peel off, and does not reach instructions for use.Performances such as the employing metal is made sheath, requires metal to have certain thickness, and compare its flexibility with plastic sheath relative relatively poor, and cable more is difficult to bending, and metal sheath is acidproof, alkaline-resisting, corrosion-resistant are also relatively poor relatively.

In sum, prior art exists weak point to be: 1, the cable flexibility is poor, is difficult to bending, and it is bigger to process, lay difficulty; 2, close up at metallic sheath, vertically in the process of metal working such as welding, rolling texture, mica powder all very easily peels off, and peels off the function of all having lost insulation as long as exist, and does not reach instructions for use; Performances such as 3 adopt metal sheath, acidproof, alkaline-resisting, corrosion-resistant are also relatively poor relatively; 4, fireproof poor performance causes fire easily.

The utility model content

The technical problems to be solved in the utility model provides that a kind of flexibility is good, good, acidproof, alkaline-resisting, the corrosion resistant fire resistant flexible multicore cable of fireproof.

A kind of fire resistant flexible multicore cable described in the utility model comprises cable core, and its cable core is by stranded the forming of some eradication edge cores; Gap at cable core is provided with packed layer, lapped insulation band outside cable core, and the cable core outermost layer extrudes oversheath; Described insulated wire cores by conductor, wrapped outside conductor mica tape and insulating barrier, the sheath that is extruded in successively outside the mica tape constitute.

Described insulated wire cores is more than three or three.

The beneficial effects of the utility model are:

The utility model uses the polyolefin outer jacket, and to compare flexibility higher with metal sheath, and easier bending is processed, laid conveniently, acidproof, alkaline-resisting, corrosion-resistant excellence; In addition, the outer extruded insulation of mica tape is compared with metal processing, has protective effect, and mica powder is peeled off; The utility model adopts potteryization fire-resistant silicon rubber sheath, can be under the high temperature and flame ablation more than 500 ℃, namely begin to sinter into hard ceramic-like housing behind burning 2～4min, and the ablation time is more long, temperature is more high, the potteryization effect is more obvious, ablation temperature can reach 1200～1500 ℃, this hard ceramic-like housing has the good insulation performance, can also very effectively stop simultaneously and burning away of flame can ensure the unobstructed of communication in the fire, power circuit.Potteryization silicon rubber is nontoxic, tasteless at normal temperatures, possesses the feature of silicon rubber, has good flexibility and elasticity, makes cable also have better flexibility, easier bending.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Embodiment:

As shown in Figure 1, a kind of fire resistant flexible multicore cable described in the utility model comprises cable core, and its cable core is to thoroughly do away with stranded the forming of edge core by three; Described insulated wire cores by conductor 1, wrapped outside conductor 1 mica tape 2 and insulating barrier 3, the potteryization silicon rubber sheath 4 that is extruded in successively outside the mica tape 2 constitute; Be provided with packed layer 5 in the gap of cable core, wrapped potteryization silicon rubber insulation band 6 outside cable core, the cable core outermost layer extrudes halogen-free and low-smoke flame-retardant polyolefin oversheath 7.

The utility model provides a kind of fire resistant flexible multi-core cable structure form and implementation method; the above only is preferred implementation method of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement, these improvement also should be considered as protection range of the present utility model.

Claims

1. a fire resistant flexible multicore cable comprises cable core, and its cable core is by stranded the forming of some eradication edge cores; Be provided with packed layer (5) in the gap of cable core, lapped insulation band (6) outside cable core, the cable core outermost layer extrudes oversheath (7); It is characterized in that: described insulated wire cores by conductor (1), wrapped outside conductor (1) mica tape (2) and be extruded in insulating barrier (3) outside the mica tape (2) successively, sheath (4) constitutes.

2. fire resistant flexible multicore cable according to claim 1, it is characterized in that: described insulated wire cores is more than three or three.