CN212209008U

CN212209008U - Novel super A-level flame-retardant fire-resistant power cable

Info

Publication number: CN212209008U
Application number: CN202021325415.3U
Authority: CN
Inventors: 卢小磊; 叶宇; 周友芝; 水利飞; 周环
Original assignee: Anhui Huayu Cable Group Co ltd
Current assignee: Anhui Huayu Cable Group Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2020-12-22
Anticipated expiration: 2030-07-08

Abstract

The utility model provides a novel super A level fire-retardant fire-resistant power cable, including flame retardant coating, insulating layer, filler, band layer, fire-retardant layer, oversheath layer, holding tank, arc piece, wire net, outer adhesive linkage, fire-retardant rubber piece and interior adhesive linkage, the conductor outside wraps up the flame retardant coating, the insulating layer has been wrapped up in to the flame retardant coating outside, the insulating layer outside is provided with the band layer, and the filler is filled in the clearance between band layer and the insulating layer, the crowded package of band layer outside has fire-retardant layer, the holding tank has been seted up to fire-retardant layer inside, the holding tank internally mounted has the arc piece, the arc piece is inside to be provided with fire-retardant rubber piece, the fire-retardant rubber piece outside is provided with outer adhesive linkage, the outer adhesive linkage of outer adhesive linkage has the wire net, fire-retardant rubber piece inboard is provided with interior adhesive linkage, the outer jacket linkage of fire-retardant, the utility model discloses rational in infrastructure, improve the fire-resistant flame retardant property of cable, cable safety in utilization is higher.

Description

Novel super A-level flame-retardant fire-resistant power cable

Technical Field

The utility model belongs to the technical field of the power cable is used, a fire-retardant fire-resistant power cable is related to, specifically a novel fire-retardant fire-resistant power cable of super A level.

Background

The cable is an electric energy or signal transmission device, and generally comprises several or several groups of conducting wires, and the cable comprises a power cable, a control cable, a compensation cable, a shielding cable, a high-temperature cable, a computer cable, a signal cable, a coaxial cable, a fire-resistant cable, a marine cable, a mining cable, an aluminum alloy cable and the like. They are composed of single or multi-strand wires and insulating layers, and are used for connecting circuits, electric appliances and the like.

In the fire accident of the power system in the world, the proportion of power supply interruption of the power system caused by the fire of the power cable tends to rise, the fire resistance and the fire resistance of the common cable are poor, and in case of fire, the common cable is easy to burn to generate toxic and harmful substances, so that the damage to equipment and workers is large, and meanwhile, the common cable is easy to be maliciously cut off and damaged due to the lack of protective measures;

therefore, a novel super A-level flame-retardant fire-resistant power cable is provided, the super A-level flame-retardant cable is adopted in places such as power plants and transformer substations, wherein a large number of electrical devices and a large number of cables are densely laid, super A-level flame retardance has a higher flame-retardant requirement than common cables, when a fire disaster occurs, toxic and harmful substances generated by cable combustion can cause minimum damage to the devices and workers, the fact that an important loop can be continuously supplied with power under the condition of the fire disaster through the fire-resistant cable is increasingly important, meanwhile, the novel super A-level flame-retardant fire-resistant power cable is provided with protection measures, and malicious damage is effectively avoided.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a novel fire-retardant fire-resistant power cable of super A level to solve the problem that proposes in the above-mentioned background art, the utility model discloses rational in infrastructure improves the fire-resistant flame retardant property of cable, and cable safety in utilization is higher.

The purpose of the utility model can be realized by the following technical scheme: the utility model provides a novel fire-retardant fire-resistant power cable of super A level, includes conductor, flame retardant coating, insulating layer, filler, band layer, fire-retardant layer, oversheath layer and cable main part, cable main part inside is provided with a plurality of conductor, conductor outside parcel has the flame retardant coating, flame retardant coating outside parcel has the insulating layer, the insulating layer outside is provided with the band layer, and clearance packing between band layer and the insulating layer has the filler, the crowded package in the band layer outside has fire-retardant layer, the holding tank has been seted up to fire-retardant in situ portion, holding tank internally mounted has the arc piece, the inside fire-retardant rubber piece that is provided with of arc piece, the fire-retardant rubber piece outside is provided with outer adhesive linkage, outer adhesive linkage outside has the wire net, fire-retardant rubber piece inboard is provided with interior adhesive linkage, fire-retardant layer outside parcel has the oversheath layer, the conductor outside is equipped with flame retardant coating, insulating layer, filler, band layer, fire-retardant layer and oversheath layer.

Furthermore, the conductor, a fire-resistant layer wrapped outside the conductor and an insulating layer wrapped outside the fire-resistant layer form an insulating wire core, and the outer bonding layer and the inner bonding layer are made of flame-retardant glue consisting of aluminum phosphate, magnesium silicate, sodium silicate, a fire-retardant agent and an inorganic polymer polymerization agent.

Furthermore, the conductor is a round monofilament twisted and compacted copper conductor, and the fire-resistant layer is wrapped by double-layer mica tapes in an overlapping mode.

Further, the insulating layer is extruded by using cross-linked polyethylene.

Further, the filler is high flame retardant filler.

Furthermore, the belting layer is a low-smoke halogen-free high-flame-retardant belting layer, the flame-retardant layer is extruded with fire clay, and the outer sheath layer is a low-smoke halogen-free flame-retardant polyolefin sheath.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a novel fire-retardant fire-resistant power cable of super A level, except having the transmission electrical property better than ordinary low voltage power cable, it still possesses low smoke and zero halogen simultaneously, fire-resistant, characteristics such as super A level fire-retardant, the fire clay is nontoxic, tasteless, to the human body, no harmful effects in the natural environment, the flue gas after the burning is very little, there is no smoke toxicity, the flue gas is also harmless to the human body, the fire clay is different from the biggest characteristic of other rubbers, plastics etc. under the condition of conflagration, high temperature, can burn into hard shell, this is its most crucial characteristic;

2. the conductor is a round monofilament twisted and compacted copper conductor, so that excellent electrical performance of the conductor can be guaranteed; the fire-resistant layer adopts a double-layer mica tape structure which is lapped and wound in an overlapping mode, so that the power supply function of the cable can be continuously kept under the condition of fire, and the insulating layer adopts a cross-linked polyethylene insulating layer extrusion mode; the filler is high flame retardant, so that the cable can well prevent flame from spreading under the condition of fire; the flame-retardant layer adopts an extruded fire clay structure, so that the cable has good flame spread resistance; the outer sheath layer adopts a low-smoke halogen-free flame-retardant polyolefin sheath, so that the cable has good physical properties such as low smoke halogen free, flame retardant and the like;

3. the arc-shaped sheet is installed in the accommodating groove and is fixedly bonded through the inner bonding layer, the cable is effectively prevented from being maliciously sheared and damaged through the arrangement of the steel wire mesh, and the flame retardant performance of the cable is further improved through the arrangement of the flame retardant rubber sheet;

to sum up, the utility model discloses rational in infrastructure, improve the fire-resistant flame retardant property of cable, cable safety in utilization is higher.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic view of the overall structure of a novel ultra-a-level flame-retardant and fire-resistant power cable of the present invention;

FIG. 2 is a front view of the novel ultra-A-class flame-retardant fire-resistant power cable of the present invention;

FIG. 3 is a schematic structural view of an arc-shaped piece in the novel ultra-A-class flame-retardant and fire-resistant power cable of the present invention;

in the figure: 1. a conductor; 2. a refractory layer; 3. an insulating layer; 4. a filler; 5. a belting layer; 6. a flame retardant layer; 7. an outer jacket layer; 8. accommodating grooves; 9. an arc-shaped sheet; 10. steel wire mesh; 11. an outer adhesive layer; 12. a flame retardant rubber sheet; 13. an inner adhesive layer; 14. a cable body.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-3, a novel ultra-a-level flame-retardant fire-resistant power cable comprises a conductor 1, a flame-retardant layer 2, an insulating layer 3, a filler 4, a belting layer 5, a flame-retardant layer 6, an outer sheath layer 7 and a cable main body 14, wherein a plurality of conductors 1 are arranged inside the cable main body 14, the flame-retardant layer 2 is wrapped outside the conductor 1, the insulating layer 3 is wrapped outside the flame-retardant layer 2, the belting layer 5 is arranged outside the insulating layer 3, the filler 4 is filled in a gap between the belting layer 5 and the insulating layer 3, the flame-retardant layer 6 is wrapped outside the belting layer 5 in an extruded manner, an accommodating groove 8 is formed inside the flame-retardant layer 6, an arc-shaped sheet 9 is installed inside the accommodating groove 8, a flame-retardant rubber sheet 12 is arranged inside the arc-shaped sheet 9, an outer bonding layer 11 is arranged outside the flame-retardant, the inner side of the flame-retardant rubber sheet 12 is provided with an inner bonding layer 13, the outer side of the flame-retardant layer 6 is wrapped with an outer sheath layer 7, and the outer side of the conductor 1 is sequentially provided with a flame-retardant layer 2, an insulating layer 3, a filler 4, a belting layer 5, a flame-retardant layer 6 and the outer sheath layer 7 from inside to outside.

The cable comprises a conductor 1, a fire-resistant layer 2 wrapped outside the conductor 1 and an insulating layer 3 wrapped outside the fire-resistant layer 2, wherein the outer bonding layer 11 and the inner bonding layer 13 are made of flame-retardant glue consisting of aluminum phosphate, magnesium silicate, sodium silicate, a fire-retardant agent and an inorganic polymer polymerization agent, so that the cable has higher flame-retardant performance, the conductor 1 is a round monofilament twisted and tightly pressed copper conductor, the excellent electrical performance of the conductor can be guaranteed, and the fire-resistant layer 2 is wrapped by overlapping double-layer mica tapes, so that the power supply function of the cable can be continuously kept under the fire condition.

The insulating layer 3 is extruded by cross-linked polyethylene, the filler 4 is high-flame-retardant filler, flame spread can be well prevented under the condition of fire, the belting layer 5 is a low-smoke halogen-free high-flame-retardant belting layer, the flame-retardant layer 6 is extruded fire clay, so that the cable has good flame-retardant flame spread capability, and the outer sheath layer 7 is a low-smoke halogen-free flame-retardant polyolefin sheath, so that the cable has good physical properties such as low-smoke halogen-free flame retardance, flame retardance and the like.

The utility model discloses when specifically implementing: the novel ultra-A-level flame-retardant and fire-resistant power cable has better transmission electrical property than a common low-voltage power cable, and also has the characteristics of low smoke, zero halogen, fire resistance, ultra-A-level flame retardance and the like, the fire clay arranged in the flame-retardant layer 6 is non-toxic and tasteless, has no adverse effect on human bodies and natural environment, the smoke after combustion is very small, has no smoke toxicity and is harmless to human bodies, and the biggest characteristic that the fire clay is different from other rubbers, plastics and the like is that the fire clay can be burnt into a hard shell under the conditions of fire and high temperature, which is the most key characteristic of the fire clay;

meanwhile, the conductor 1 is stranded by adopting round monofilaments and tightly presses the copper conductor, so that the excellent electrical performance of the copper conductor can be ensured, the fire-resistant layer 2 is of a double-layer mica tape structure which is wound in an overlapped mode, so that the power supply function of the cable can be continuously kept under the condition of fire, the insulating layer 3 is extruded by adopting a cross-linked polyethylene insulating layer, the filler 4 is high-flame-retardant filler, so that the flame spread of the cable can be well prevented under the condition of fire, the fire-resistant layer 6 is of a fire-resistant clay extruded structure, so that the cable has good flame-retardant flame spread capacity, and the outer sheath layer 7 is of a low-smoke halogen-free flame-retardant polyolefin sheath;

wire net 10 bonds to flame retardant rubber piece 12 through outer adhesive linkage 11 on, wire net 10 and flame retardant rubber piece 12 constitute arc piece 9, and arc piece 9 is installed to holding tank 8 to it is fixed to bond through interior adhesive linkage 13, through the setting of wire net 10, effectively avoid the cable to be cut the destruction maliciously, through the setting of flame retardant rubber piece 12, further increased the fire behaviour of cable.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a novel fire-retardant fire-resistant power cable of super A level, its characterized in that includes conductor (1), flame retardant coating (2), insulating layer (3), filler (4), band layer (5), flame retardant coating (6), oversheath layer (7) and cable subject (14), cable subject (14) inside is provided with a plurality of conductor (1), conductor (1) outside parcel has flame retardant coating (2), the insulating layer (2) outside parcel has insulating layer (3), the insulating layer (3) outside is provided with band layer (5), and the clearance packing between band layer (5) and insulating layer (3) has filler (4), crowded package in band layer (5) outside has flame retardant coating (6), holding tank (8) have been seted up to flame retardant coating (6) inside, holding tank (8) internally mounted has arc piece (9), arc piece (12) are provided with fire-retardant rubber piece (9) inside, the outer side of the flame-retardant rubber sheet (12) is provided with an outer bonding layer (11), the outer side of the outer bonding layer (11) is bonded with a steel wire mesh (10), the inner side of the flame-retardant rubber sheet (12) is provided with an inner bonding layer (13), the outer side of the flame-retardant layer (6) is wrapped with an outer sheath layer (7), and the outer side of the conductor (1) is sequentially provided with a flame-retardant layer (2), an insulating layer (3), a filler (4), a wrapping layer (5), a flame-retardant layer (6) and the outer sheath layer (7) from inside to outside.

2. The novel ultra-A-level flame-retardant fire-resistant power cable as claimed in claim 1, wherein the conductor (1), the flame-retardant layer (2) wrapped outside the conductor (1) and the insulating layer (3) wrapped outside the flame-retardant layer (2) form an insulating core, and the outer bonding layer (11) and the inner bonding layer (13) are both flame-retardant glue consisting of aluminum phosphate, magnesium silicate, sodium silicate, a fire retardant and an inorganic polymer.

3. The novel ultra-A-class flame-retardant fire-resistant power cable according to claim 1, wherein the conductor (1) is a round monofilament twisted compacted copper conductor, and the fire-resistant layer (2) is wrapped with double-layer mica tapes in an overlapping manner.

4. A novel ultra class a flame retardant fire resistant power cable according to claim 1 characterized in that the insulation layer (3) is extruded with cross-linked polyethylene.

5. The novel ultra-A-class flame-retardant and fire-resistant power cable according to claim 1, wherein the filler (4) is a high-flame-retardant filler.

6. The novel ultra-A-level flame-retardant fire-resistant power cable according to claim 1, wherein the wrapping layer (5) is a low-smoke halogen-free high-flame-retardant wrapping layer, the flame-retardant layer (6) is extruded fire clay, and the outer sheath layer (7) is a low-smoke halogen-free flame-retardant polyolefin sheath.