CN205900139U

CN205900139U - Heavy flexible mineral insulation fireproof cable

Info

Publication number: CN205900139U
Application number: CN201620789989.3U
Authority: CN
Inventors: 芮黎春
Original assignee: Jiangsu Polytron Technologies Inc
Current assignee: Jiangsu Polytron Technologies Inc
Priority date: 2016-07-26
Filing date: 2016-07-26
Publication date: 2017-01-18
Anticipated expiration: 2026-07-26

Abstract

The utility model relates to a heavy flexible mineral insulation fireproof cable, including a plurality of conductors and sheath, the sheath setting is outside a plurality of conductors, and a plurality of conductors divide into six group's conductors, and six group's conductors twist into the one, and every group conductor comprises six solitary conductors, and every group conductor twines respectively outward has alkali -free glass fiber to wind the band, and it has the filler to pack between six solitary conductors in every group conductor, and the outer winding of six group's conductors has the mica tape to wind the package, and the mica tape winds the outer parcel of package has the insulating layer, the sheath includes inner sheath and oversheath, is equipped with the screw thread on the inner sheath to be equipped with the one deck inoxidizing coating on the inner sheath, the inner sheath cover is established outside the insulating layer, and the oversheath cover is established outside the inner sheath, this cable section is big, and it is big, flexible good to have a overload capacity, the fire prevention, high temperature resistant, insulating properties is good, destruction that the very meeting of weatherability received expend with heat and contract with cold natural force or electric power.

Description

Heavy flexible mineral insulation fireproof cable

Technical field

The utility model be related to a kind of cable and in particular to a kind of heavy type flexible mineral matter insulated cable.

Background technology

Mineral insulated cable has gone up the production of a century, applicating history abroad, also has nearly three ten years at home, its The performance practical application after nearly ten thousand projects proves, such as National Stadium (Bird's Nest), Grand National Theatre, the Chinese Central Television (CCTV), The state keys such as Capital Airport new construction, Dongguan grand theater, Oriental Art Center or local key project；But because mineral are exhausted Edge cable product structure never updates, and manufacturing process falls behind complexity, and using real core copper bar, sheath is drawing copper tubes to its conductor, because This, cable is in rigidity, and insulating materials adopts the easy moisture absorption of magnesia (mgo) powder, brings much to the making of installation and terminal Difficulty, and mineral insulated cable limited by manufacture craft, cross-sectional area of conductor is little, and it is short to make length, and adverse circumstances construction damage Copper sheath, installs also cumbersome, and impact cable runs and the life-span, and the exhausted fireproof cable (bbtrz) of heavy flexible mineral relies on The superiority of itself, has the trend progressively replacing mineral insulated cable, its main cause is: heavy flexible mineral insulation cable is It is made up of copper stranded conductor, mineral compound insulation and mineral compound sheath, it adopts flexible structure, and main material all adopts Inorganic material, compensate for that structure is hard, easy firing, the defect such as poisonous, and has some other cables and do not have the advantage that, such as: Fire resisting, current-carrying capacity is big, impact resistance voltage, mechanical resistant are damaged, Halogen is nontoxic, explosion-proof, waterproof, corrosion-resistant, life-span length, safe, resistance to The features such as overload, high temperature resistant, low cost, particularly surface adds Halogen sheath, preferably plays the property of mineral insulated cable.

In order to adapt to national economic development, make enterprise more competitive in fierce market competition, in company technique The research and development of the heart just develop towards high technology content, safe environment protection type, multi items, multi-series, multipurpose direction, based on state The growth requirement of interior market particularly mineral insulated cable, in order to open up further and occupy market, increases economic efficiency, and meets User requires, and a kind of research and development flexible mineral insulation fire prevention double sheathed cable has definite meaning, and this cable removes and meets jb/t 313- Outside 2011 prescribed by standard performances, also there is fire resisting function, still circuit can be kept within a certain period of time normal under fired state Run, be that personnel escape, process accident try to gain time precious to one, from China's economic development and power construction to flexible mineral insulation The demand of high flame resistant cable is seen, a lot of industry sources are predicted as 18-25% growth ratio in recent years, predicts the year two thousand twenty The year growth rate of demand average out to 15% of front China flexible mineral insulation high flame resistant cable, divides according to industry statistic data and market Analysis prediction, China's flexible mineral insulation high flame resistant cable demand is 6870km within 2011, is up to 12000km within 2012,2014 Year is predicted as 25000km, and the year two thousand twenty is up to 45000km, therefore has extraordinary social benefit and economic benefit.

Utility model content

Technical problem to be solved in the utility model is, the shortcoming overcoming prior art, provides a kind of heavy flexibility ore deposit Substance insulation fireproof cable, this cross-section of cable is big, and it is big, flexible to have overload capacity, fire prevention, high temperature resistant, excellent insulating property, Good weatherability will not be expanded with heat and contract with cold natural force or electrodynamic destruction.

In order to solve above technical problem, the utility model provides a kind of heavy type flexible mineral insulation fireproof cable, including Multiple conductors and sheath, sheath is arranged on outside multiple conductors, wherein:

Conductor is coated on fireprotection layer wire outside, insulating barrier and insulating protective layer group by the wire positioned at middle part and successively Become, multiple conductors are divided into six groups of conductors, and six groups of conductors twist into one, and every group of conductor is made up of six single conductors, and every group In six single conductors centered on one of conductor remaining five conductor be distributed on its circumferencial direction, every group of conductor Outer be wound with alkali-free glass wool twining package tape respectively, be filled with filler between the single conductor of six in every group of conductor, six groups It is wound with Mica tape, Mica tape is wrapped with thermal insulation layer outside conductor；

Sheath includes inner sheath and oversheath, and inner sheath is provided with screw thread, and inner sheath is provided with one layer of overcoat, interior shield It is set in outside thermal insulation layer, oversheath is set in outside inner sheath.

The technical scheme that the utility model limits further is:

Further, in aforementioned heavy type flexible mineral insulation fireproof cable, wire is made by twisting using many copper free wires.

In aforementioned heavy type flexible mineral insulation fireproof cable, filler is alkali-free glass wool, and insulating protective layer is that aramid fiber is fine Dimension layer, thermal insulation layer is Halogen silicon porcelain cement, and insulating barrier is magnesia, silica and kaolinic mixture layer, counts in mass ratio Magnesia: silica: kaolin=3:1:1.5.

In aforementioned heavy type flexible mineral insulation fireproof cable, inner sheath is copper sheath.

The beneficial effects of the utility model are:

The utility model is made up of multiple conductors, and multiple conductor divides six groups, is individually led by six for every group in six groups again Body forms, and cross-sectional area of conductor is big, extends service life, reduces cost, and overload capacity is big, using stranded conductor, increases cable Flexibility.

Mica tape plays the insulation effect arriving very much, and thermal insulation layer ensure that the temperature tolerance of cable, and inner sheath is provided with spiral shell Line, strengthens the frictional property between inner sheath and oversheath, the fastness between enhancing inner sheath and oversheath is it is ensured that cable is normal Use, be not in obscission.

Brief description

Fig. 1 is the structural representation of the utility model embodiment；

Fig. 2 is the structural representation of conductor in the utility model embodiment；

In figure: 1- conductor, 11- wire, 12- fireprotection layer, 13- insulating barrier, 14- insulating protective layer, 2- alkali-free glass filament winding Band, 3- filler, 4- Mica tape, 5- thermal insulation layer, 6- inner sheath, 7- oversheath.

Specific embodiment

Embodiment 1

A kind of heavy type flexible mineral insulation fireproof cable that the present embodiment provides, structure as shown in Figure 1-2, is led including multiple Body 1 and sheath, sheath is arranged on outside multiple conductors 1, wherein:

Conductor 1 is coated on fireprotection layer 12 wire 11 outside, insulating barrier 13 and absolutely by the wire 11 positioned at middle part and successively Edge protective layer 14 aramid fiber layer forms, and wire 11 is made by twisting using many copper free wires, and multiple conductors 1 are divided into six groups leads Body, six groups of conductors twist into one, and every group of conductor is made up of six single conductors 1, and six in every group single conductors 1 with Centered on one of conductor 1, remaining five conductor 1 is distributed on its circumferencial direction, is wound with alkali-free glass respectively outside every group of conductor Glass filament winding band 2, is filled with filler 3 alkali-free glass wool, outside six groups of conductors between the single conductor 1 of six in every group of conductor It is wound with Mica tape 4, Mica tape 4 is wrapped with thermal insulation layer 5 Halogen silicon porcelain cement；

Sheath includes inner sheath 6 and oversheath 7, and inner sheath 6 is copper sheath, and inner sheath 6 is provided with screw thread, and inner sheath 6 It is provided with one layer of overcoat, inner sheath 6 is set in outside thermal insulation layer 5, and oversheath 7 is set in outside inner sheath 6.

In the present embodiment, insulating barrier 13 is magnesia, silica and kaolinic mixture layer, counts oxygen in mass ratio Change magnesium: silica: kaolin=3:1:1.5.The preparation method of this fireproof cable is as follows:

One layer of fireprotection layer, insulating barrier and insulation protection is coated by many copper free wires successively outside the wire being first made by twisting Layer forms a single conductor, and the conductor combination then selecting the six roots of sensation same becomes one group of conductor, individually leads for six in every group of conductor It is filled with filler between body, be wound around alkali-free glass wool twining package tape outside every group of conductor, be wound with alkali-free glass respectively from six groups The conductor of glass filament winding band twists into one, again its outer be surrounded with Mica tape, heat-insulated in one layer of Mica tape outer cladding Layer；

Inner sheath is set in outside thermal insulation layer, arranges one layer of overcoat, be provided with outside the inner sheath of overcoat on inner sheath It is provided with oversheath, you can form heavy flexible mineral insulation fireproof cable.

In addition to the implementation, the utility model can also have other embodiment.All employing equivalents or equivalent change Change the technical scheme of formation, all fall within the protection domain of the utility model requirement.

Claims

1. a kind of heavy type flexible mineral insulation fireproof cable it is characterised in that: include multiple conductors (1) and sheath, described sheath It is arranged on multiple conductors (1) outward, wherein:

Described conductor (1) is coated on wire (11) fireprotection layer (12) outward, insulation by the wire (11) positioned at middle part and successively Layer (13) and insulating protective layer (14) composition, multiple conductors (1) are divided into six groups of conductors, and six groups of conductors twist into one, every group of conductor Be made up of six single conductors (1), and six in every group single conductors (1) centered on one of conductor (1) its Five conductors (1) that remaining are distributed on its circumferencial direction, are wound with alkali-free glass wool twining package tape (2) outside every group of conductor respectively, every group It is filled with filler (3) between six in conductor single conductors (1), outside six groups of conductors, be wound with Mica tape (4), institute State Mica tape (4) and be wrapped with thermal insulation layer (5)；

Described sheath includes inner sheath (6) and oversheath (7), and described inner sheath (6) is provided with screw thread, and sets on inner sheath (6) There is one layer of overcoat, described inner sheath (6) is set in thermal insulation layer (5) outward, and described oversheath (7) is set in described inner sheath (6) Outward.

2. heavy type flexible mineral insulation fireproof cable according to claim 1 it is characterised in that: described wire (11) adopts Many copper free wires are made by twisting.

3. according to claim 1 heavy type flexible mineral insulation fireproof cable it is characterised in that: described filler (3) is Alkali-free glass wool, described insulating protective layer (14) is aramid fiber layer, and described thermal insulation layer (5) is Halogen silicon porcelain cement, described Insulating barrier (13) be magnesia, silica and kaolinic mixture layer, count magnesia: silica in mass ratio: high Ridge soil=3:1:1.5.

4. according to claim 1 heavy type flexible mineral insulation fireproof cable it is characterised in that: described inner sheath (6) is Copper sheath.