CN212624918U

CN212624918U - Mica tape mineral insulated cable

Info

Publication number: CN212624918U
Application number: CN202021550292.3U
Authority: CN
Inventors: 刘小祥; 杨自昆; 黎焕枝; 黄金
Original assignee: Guangxi Zonglan Cable Group Co ltd
Current assignee: Guangxi Zonglan Cable Group Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-02-26
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a mica tape mineral insulated cable, including outer protective sheath, mineral insulation layer, insulating protective layer and core, outer protective sheath parcel is outmost at whole cable, the mineral insulation layer is the synthetic fluorophlogopite area of multilayer two-sided and sets up between outer protective sheath and insulating protective layer, insulating protective layer is the no alkali glass fiber area of multilayer, the core parcel is inside the flame retardant coating, and this core includes flexible conductor, the insulating cover of plastics, packing core and packing grain, the insulating cover parcel of plastics is on the outer layer of core flexible conductor, the packing core is filled in the gap between the flexible conductor, it has the packing grain that can freely remove to fill between flexible conductor and the packing core. The utility model discloses a cable fire behavior is good, and the pliability is good, and it makes length long for traditional mineral cable, reduces to connect, reduces to damage the probability.

Description

Mica tape mineral insulated cable

Technical Field

The utility model relates to a cable manufacture technical field, in particular to mica tape mineral insulated cable.

Background

With the rapid development of economy in China, the requirements on the performances of fire resistance, flame retardance and the like of cables are continuously improved, and the requirements on fire protection of intensive buildings such as super high-rise buildings, entertainment venues and the like are continuously improved. In recent years, along with the improvement of the levels of related materials and process equipment in China, on the basis of the original mineral insulated cable, an RTTZ type mineral insulated cable appears, the execution standard is GB/T34926-2017 rated voltage 0.6/1kV and below mica tape mineral insulated corrugated copper sheath cable and terminal, the fireproof cable adopts a copper conductor, mineral insulation adopts a synthetic mica tape + ceramic silicon plastic composite tape or a glass fiber cloth tape, an outer sheath adopts a corrugated copper sheath and a low-smoke halogen-free ring protection layer material to play a final protection role, the cable solves the limitation of the manufacturing length of the magnesium oxide mineral insulated cable and increases the flexibility of the cable, but the problem of the flexibility still occurs in the using process. And the mica tape mineral insulated cable also has strong fireproof performance, so that the preparation of the mica tape mineral insulated cable capable of meeting the conditions is necessary.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mica tape mineral insulated cable, this cable fire behavior is good, and the pliability is good, and it is long to make length for traditional mineral cable, reduces to connect, reduces to damage the probability.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a mica tape mineral insulated cable, includes outer protective sheath, mineral insulating layer, insulating protective layer and core, outer protective sheath parcel is outermost at whole cable, the mineral insulating layer is the synthetic fluorophlogopite area of multilayer two-sided and sets up between outer protective sheath and insulating protective layer, insulating protective layer is the no alkali glass fiber tape of multilayer, the core parcel is inside the flame retardant coating, and this core includes flexible conductor, the insulating cover of plastics, packing core and filler grain, the insulating cover parcel of plastics is on the outer layer of core flexible conductor, the filler core is filled in the gap between the flexible conductor, but the filler grain of free mobility is filled between flexible conductor and the packing core.

Furthermore, the outer surface of outer protective sheath spraying has the abrasionproof coating, and sets to dull polish feel, the thickness of insulating protective layer is half of mineral insulating layer.

Further, the thickness of the double-sided synthetic fluorophlogopite belt is 1-5 mm.

Further, the thickness of the insulating protective layer is 3-10 mm.

Furthermore, the flexible conductor is provided with a plurality of flexible conductors which are uniformly distributed in the core body, the diameter of the flexible conductor is 1.5-3mm, and the flexible conductor is formed by weaving and winding a plurality of thin soft copper wires.

Further, the flexible conductor is wrapped inside by the plastic insulating sleeve, and the outer surface of the plastic insulating sleeve is smooth.

Further, the filling cores have diameters of different sizes, the small-diameter filling core is filled in the small gap in the middle of the whole core body, and the large-diameter filling core is filled around the core body.

Further, the filling particles are round particles, the surface is smooth and easy to slide, and the filling particles are filled in the gaps of the core body.

The utility model has the advantages that:

1. the double-sided synthetic fluorophlogopite belt is directly arranged in the outer layer protective sleeve, so that the fireproof performance of the cable can be greatly improved, and the abrasion-proof coating sprayed on the outer layer can prevent the cable from being abraded when being dragged;

2. the double-sided synthetic fluorophlogopite tape and the alkali-free glass fiber tape are sequentially arranged in the outer layer protective sleeve, so that the bending property and the flattening property of the whole cable can be greatly enhanced, and the cable has excellent flame retardant property;

3. the flexibility of the cable is increased by arranging the flexible conductor, the strength is increased by arranging the filling core, and the flexible conductor is protected to a certain extent;

4. through set up mobilizable particulate matter in the core and be convenient for improve the performance of buckling of whole cable, when the cable was buckled, the packing grain can be according to the trend of buckling, moves to the position of difference and is convenient for form the shape of buckling and avoid producing local extrusion.

Drawings

Fig. 1 is a schematic structural view of the cross section of the present invention.

In a specific embodiment, the outer protective sleeve 1, the mineral insulating layer 2, the insulating protective layer 3, the core 4, the flexible conductor 5, the plastic insulating sleeve 6, the filling core 7 and the filling particles 8.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is described in further detail. It should be understood, however, that these embodiments are provided so that this disclosure will be thorough and complete, and that many of the details set forth in this specification will be sufficient to provide a thorough understanding of one or more aspects of the present invention, even though these aspects of the invention may be practiced without these specific details.

As shown in fig. 1, a mica tape mineral insulated cable comprises an outer protective sleeve 1, a mineral insulating layer 2, an insulating protective layer 3 and a core 4, wherein the outer protective sleeve 1 wraps the outermost layer of the whole cable, the mineral insulating layer 2 is a multilayer double-sided synthetic fluorophlogopite tape and is arranged between the outer protective sleeve 1 and the insulating protective layer 3, the insulating protective layer 3 is a multilayer alkali-free glass fiber tape, and the bending performance and the flattening performance of the whole cable can be greatly enhanced and the cable has excellent flame retardant performance by sequentially arranging the double-sided synthetic fluorophlogopite tape and the alkali-free glass fiber tape in the outer protective sleeve 1; the core body 4 is wrapped inside the fire-resistant layer and comprises flexible conductors 5, a plastic insulating sleeve 6, a filling core 7 and filling particles 8, the plastic insulating sleeve 3 is wrapped on the outer layer of the core flexible conductors 5, the filling core 7 is filled in gaps between the flexible conductors 5, and the filling particles 8 which can move freely are filled between the flexible conductors 5 and the filling core 7.

An anti-abrasion coating is sprayed on the outer surface of the outer-layer protective sleeve 1, the outer surface is frosted, and the thickness of the insulating protective layer is half of that of the mineral insulating layer; the outer layer is sprayed with the anti-abrasion coating to prevent abrasion when the cable is dragged.

The thickness of the double-sided synthetic fluorophlogopite tape is 1-5mm, the double-sided synthetic fluorophlogopite tape can withstand voltage of 1kV for 90min without breakdown at the high temperature of 1000 +/-50 ℃, and the combustion heat value of the double-sided synthetic fluorophlogopite tape is 1.5MJ/kg, so that the requirement that the combustion heat value of an A-grade non-combustible cable is less than or equal to 2MJ/kg is met.

The thickness of the insulating protective layer is 3-10mm, so that the cable has the performances of high temperature resistance of more than 1000 ℃ without combustion and combustion supporting, the combustion heat value is 0.3MJ/kg, the requirement that the combustion heat value of the A-grade non-combustible cable is less than or equal to 2MJ/kg is also met, and the thickness is preferably 8 mm.

The flexible conductor 5 is provided with a plurality of flexible conductors which are uniformly distributed in the core body, the diameter of the flexible conductor is 1.5-3mm, and the flexible conductor is formed by using 0.18mm soft copper wires to be woven into a twist shape firstly and then twisting the soft copper wires.

The plastic insulating sheath 6 wraps the flexible conductor inside, and the outer surface of the plastic insulating sheath 6 is smooth.

The packing core 7 has the diameter of equidimension not, packs the packing core of minor diameter in the middle part small gap of whole core, packs major diameter's packing core around the core, crosses to set up mobilizable particulate matter and is convenient for improve the bending performance of whole cable in the core, and when the cable was buckled, the packing grain can be according to the trend of buckling, moves to the position of difference and is convenient for form the shape of buckling and avoid producing local extrusion.

The filling particles 8 are round particles, the surface is smooth and easy to slide, the filling particles 8 are filled in gaps of the core body, the diameter of the filling particles 8 is half of that of the filling core with a small diameter, and the surface of the filling particles is smooth.

The cable of this embodiment fire behavior is good, and the pliability is good, and it makes length long for traditional mineral cable, reduces the joint, reduces and damages the probability.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A mica tape mineral insulated cable which is characterized in that: including outer protective sheath, mineral insulating layer, insulating protective layer and core, outer protective sheath parcel is outermost at whole cable, the mineral insulating layer is the synthetic fluorophlogopite area of multilayer two-sided and sets up between outer protective sheath and insulating protective layer, insulating protective layer is the alkali-free glass fiber area of multilayer, the core parcel is inside the flame retardant coating, and this core includes flexible conductor, the insulating cover of plastics, packing core and packing grain, the insulating cover parcel of plastics is in the outer layer of core flexible conductor, pack in the gap of core packing between flexible conductor, but the packing grain that has the free mobility between flexible conductor and the packing core.

2. The mica tape mineral insulated cable of claim 1, wherein: the outer surface spraying of outer protective sheath has the abrasionproof coating, and sets to dull polish feel, the thickness of insulating protective layer is half of mineral insulating layer.

3. The mica tape mineral insulated cable of claim 1, wherein: the thickness of the double-sided synthetic fluorophlogopite belt is 1-5 mm.

4. The mica tape mineral insulated cable of claim 1, wherein: the thickness of the insulating protective layer is 3-10 mm.

5. The mica tape mineral insulated cable of claim 1, wherein: the flexible conductor is provided with a plurality of flexible conductors which are uniformly distributed in the core body, the diameter of the flexible conductor is 1.5-3mm, and the flexible conductor is formed by weaving and winding a plurality of thin soft copper wires.

6. The mica tape mineral insulated cable of claim 1, wherein: the plastic insulating sleeve wraps the flexible conductor inside, and the outer surface of the plastic insulating sleeve is smooth.

7. The mica tape mineral insulated cable of claim 1, wherein: the filling cores have diameters of different sizes, the small-diameter filling cores are filled in the small gaps in the middle of the whole core body, and the large-diameter filling cores are filled around the core body.

8. The mica tape mineral insulated cable of claim 1, wherein: the filling particles are round particles, the surface is smooth and easy to slide, and the filling particles are filled in the gaps of the core body.