CN205264391U

CN205264391U - Flexible fireproof cable

Info

Publication number: CN205264391U
Application number: CN201521049910.5U
Authority: CN
Inventors: 周云峰; 刘威; 董柯; 陈林; 张宇
Original assignee: Jiangsu Shangshang Cable Group Co Ltd
Current assignee: Jiangsu Shangshang Cable Group Co Ltd
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2016-05-25
Anticipated expiration: 2025-12-15

Abstract

The utility model provides a flexible fireproof cable which the structure is: the conductor comprises single or the transposition of many annealed copper monofilament, the conductor wraps up outward and insulating constitutes the sinle silk around band wound insulating layer, insulatingly puts up rate control range 27%~38% around the band, many sinle silk transposition constitute the cable core, and it has the stopping closely to fill in the cable core, the cable core wraps up insulatingly around the band outward, insulatingly puts up rate control range 23%~30% around the band, at armor metallic sheath outside the band. Compared with the prior art, aspects such as the resistance to pressure of this cable, compliance, refractiveness all are superior to current cable product greatly.

Description

A kind of flexible fire-proof cable

Technical field

The technical program belongs to cable technology field, specifically a kind of flexible fire-proof cable.

Background technology

In prior art, it is mainly logical the resistance to of the materials such as insulating barrier, restrictive coating of improving that fireproofing of cable performance improvesFire point is realized. And the exploitation of these new materials is not can complete morning and evening, and there is its limitation. So,To improve fire resistance by increasing the modes such as jacket thickness toward contact. The problem of bringing is like this cost of cableIncrease, and fire resistance can not get significantly improving. Need, further under the prerequisite of controlling cost, improveThe fire resistance of cable, ensures the insulation electrical performance of cable, and meets user's instructions for use.

Summary of the invention

In order to solve the above-mentioned problems in the prior art, the invention proposes a kind of flexible fire-proof cable,Its structure is: conductor is by single or many annealed copper monofilament are stranded forms; Conductor outer wrapping the first insulating barrier formsCore; The first insulating barrier is that twining package tape is wrapped to be formed by insulating, and puts up rate control range 27%～38%; ManyThe stranded formation cable core of core, is closely filled with inserts in cable core; Cable core outer wrapping the second insulating barrier; Second is exhaustedEdge layer is that twining package tape is wrapped to be formed by insulating, and puts up rate control range 23%～30%; At the armoured gold of twining package tapeBelong to sheath.

The scope of the stranded lay ratio of conductor of core is 8～40 times.

The material of the insulation twining package tape of the first insulating barrier is mica tape, lay of lapping scope (5.5～20.0) mm,This insulation is wrapped with multilayer, and the gross thickness of the first insulating barrier is (0.87～2.56) mm.

In cable core, the scope of the stranded lay ratio of core is 22～40 times; The insulation that forms the second insulating barrier aroundBand is inorganic mineral band, and inorganic mineral band is overlapping wrapped, and the lapping direction of adjacent layer is contrary; The second insulating barrierThickness be (0.76～1.53) mm. The insulation twining package tape that forms the second insulating barrier is to be mica tape or glassFabric strip.

Inserts in cable core is alkali-free glass fibre rope.

Described protective metal shell is embossing copper sheath; Jacket thickness control range is (0.38～0.70) mm.

Compared with prior art, the aspect such as the resistance to pressure of this cable, flexibility, fire resistance is all better than existing greatlyCable product.

Brief description of the drawings

Fig. 1～7th, cable radial section schematic diagram in different core situations, in figure: conductor 1, the first insulationLayer insulating 2, inserts 3, the second insulating barrier 4, protective metal shell 5.

Detailed description of the invention

The technical program is further illustrated as follows below in conjunction with accompanying drawing and specific embodiment:

As Fig. 1～7, can adopt several typical cable radial section schematic diagrames of this construction of cable,

A new flexible fire-proof cable, its structure is: conductor is by single or many annealed copper monofilament are stranded forms;The insulating barrier that conductor outer wrapping insulation twining package tape is coiled into forms core, and insulation twining package tape is put up rate control range27%～38%; The many stranded formation cable cores of core, are closely filled with inserts in cable core; Cable core outer wrapping is exhaustedEdge twining package tape, insulation twining package tape is put up rate control range 23%～30%; At the armoured protective metal shell of twining package tape.

The scope of the stranded lay ratio of conductor of core is 8～40 times. The material of the twining package tape of conductor external insulation layer isMica tape, lay of lapping scope (5.5～20.0) mm; Insulating barrier wrapped with multilayer, insulating barrier totalThickness requirement is (0.87～2.56) mm. In cable core, the scope of the stranded lay ratio of core is 22～40 times;Cable core outer wrapping be inorganic mineral band, the overlapping wrapped formation core external insulation layer of multilayer inorganic mineral band, adjacentThe lapping direction of layer twining package tape is contrary; The thickness requirement of cable core external insulation layer is (0.76～1.53) mm; CableThe inorganic mineral band twining package tape of core outer wrapping is mica tape or glass fiber tape. Inserts in cable core is alkali-free glassGlass cordage. Described protective metal shell is embossing copper sheath. Jacket thickness control range (0.38～0.70) mm.

The production technology explanation of this cable:

1.1 conductor

Formed by single and many annealed copper monofilament strand systems, filament diameter tolerance scope ± 1%, twists pitch diameter processedThan control range (8～40) doubly, adjacent layer direction is generally oppositely.

1.2 insulation

By multilayer inorganic mineral insulation band with certain rate of putting up overlapping wrapped composition. Wrapped should be smooth, tight,Corrugationless and mechanical damage, pitch should be even, and adjacent layer lapping direction is contrary.

1.3 stranding

Formed lay ratio control range (22～40) so that certain direction is stranded by more than 2 or 2 coresDoubly; It is overlapping wrapped that cable core applies multilayer inorganic mineral band outward, adjacent layer opposite direction, wrapped should be smooth, tightTo guarantee cable core rounding.

1.4 sheath

After embossing, forming totally enclosed type sheath by the vertical bag welding of copper strips, copper strips answer any surface finish, entirely soft, without oil,The phenomenons such as non-oxidation; In production process, must ensure field drying, cable core be carried out to drying and processing simultaneously.

When welding, need the strict gas flow of controlling, welding current, capillary must ensure neat and tidy, avoids oilDirt, need strictly to control simultaneously distance between capillary area of bed (0.8～1.4) mm, capillary head and weld seam (0.8～2.5)mm。

Through test, the cable detection parameter of the present embodiment is as follows:

1 physical dimension

Conductor structure: the conductor standard that meets GB/T3956 cable;

Insulation system: insulation thickness control range (0.87～2.56) mm;

Jacket thickness: jacket thickness control range (0.38～0.70) mm;

Cable ovality: control range (0～3) %.

2 voltage tests

Cable conductor and conductor, apply the voltage of (1.25～3.5) kV, duration between conductor and sheathAt least 15min, cable can not puncture.

3 insulaion resistances

Under normal temperature, the product of insulaion resistance and cable length is greater than the km for 100M Ω.

4 bend tests

Cable is through specific bending radius, and forward and reverse bending 180 °, number of repetition (1～2) is inferior. SheathSurface flawless, bending rear cable is through the voltage test of (1.25～3.5) kV, and cable is without puncturing.

5 flattening tests

Cable flattens between anvil, and flattening coefficient is (0.90～0.92), jacket surface flawless after flattening test.Through the voltage test of (1.25～3.5) kV, cable is without puncturing.

6 fire resistance tests

Cable is through (950～1000) DEG C, and the flame combustion of duration 180min is tested; Carry out in additionBe subject to fiery temperature (650 ± 40) DEG C, after duration 15min, sprinkle water and supply fiery 15min; Be subject to fire temperatureDegree (950 ± 40) DEG C, mechanical oscillation continue 15min; Whole duration of test applies rated voltage, requires electricityThere is not punch-through in cable.

Claims

1. a flexible fire-proof cable, is characterized in that structure is: conductor is by single or many annealed copper monofilament are stranded forms;

Conductor outer wrapping the first insulating barrier forms core; The first insulating barrier is that twining package tape is wrapped to be formed by insulating, and puts up rate control range 27%～38%;

The many stranded formation cable cores of core, are closely filled with inserts in cable core;

Cable core outer wrapping the second insulating barrier; The second insulating barrier is that twining package tape is wrapped to be formed by insulating, and puts up rate control range 23%～30%;

At the armoured protective metal shell of twining package tape.

2. flexible fire-proof cable according to claim 1, the scope that it is characterized in that the stranded lay ratio of conductor of core is 8～40 times.

3. flexible fire-proof cable according to claim 1, the material that it is characterized in that the insulation twining package tape of the first insulating barrier is mica tape, lay of lapping scope 5.5mm～20.0mm, this insulation is wrapped with multilayer, and the gross thickness of the first insulating barrier is 0.87mm～2.56mm.

4. flexible fire-proof cable according to claim 1, is characterized in that in cable core, and the scope of the stranded lay ratio of core is 22～40 times; The insulation twining package tape that forms the second insulating barrier is inorganic mineral band, and inorganic mineral band is overlapping wrapped, and the lapping direction of adjacent layer is contrary; The thickness of the second insulating barrier is 0.76mm～1.53mm.

5. flexible fire-proof cable according to claim 4, the insulation twining package tape that it is characterized in that forming the second insulating barrier is to be mica tape or glass fiber tape.

6. flexible fire-proof cable according to claim 1, is characterized in that the inserts in cable core is alkali-free glass fibre rope.

7. flexible fire-proof cable according to claim 1, is characterized in that described protective metal shell is embossing copper sheath; Jacket thickness control range is 0.38mm～0.70mm.