CN207558465U

CN207558465U - A kind of shell-less fire resistant low-voltage cable

Info

Publication number: CN207558465U
Application number: CN201721300824.6U
Authority: CN
Inventors: 刘磊
Original assignee: Wuxi Great Wall Electric Wire & Cable Co Ltd
Current assignee: Wuxi Great Wall Electric Wire & Cable Co Ltd
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2018-06-29
Anticipated expiration: 2027-09-30

Abstract

The utility model discloses a kind of shell-less fire resistant low-voltage cables, including garland formula core, wrapped low-smoke bittern-free highly fire-proof binding tape is overlapped outside garland formula core, copper strip shielding layer is extruded outside low-smoke bittern-free highly fire-proof binding tape, the fireprotection layer that three layers of flameproof fabric overlap is extruded outside copper strip shielding layer, the plastic bellows of high temperature resistant is cased with outside fireprotection layer；The garland formula core is made of the garland formula refractory ceramics pipe of four round insulation cores and co-extrusion outside four round insulation cores；The center of the refractory ceramics pipe is equipped with heat emission hole.The utility model has high tenacity, high-impact, good bending property, the performances such as high-temperature resistant, fire prevention, anti-interference.

Description

A kind of shell-less fire resistant low-voltage cable

Technical field

The utility model belongs to electric wire field, in particular to a kind of shell-less fire resistant low-voltage cable.

Background technology

With the development of China's economic and Process of Urbanization Construction, urban distribution network system has seemed especially crowded, and a large amount of cables are handed over Mistake is crisscrossed in urban distribution network, and since cable laying space is limited, a large amount of cable laying together, proposes the safety of power grid Higher requirement, is especially increasingly taken seriously to the protection of power grid fire.The fire protection measure of common cable has two Kind, when using fire-proof cable bridge rack, fire prevention packet or fire prevention channel, but the measure causes cable heat dissipation performance to be deteriorated, thermal resistivity It improves, current-carrying capacity reduces；Second is that using fire safe type cable, wrapped mica tape is as flame retardant coating outside conductor for the cable, but this is arranged It applies and only can guarantee that cable short-duration power, cable in burning still need to scrap the cable more renewed after combustion, it can not be exhausted in cable It is continuing with, therefore increase secondary Meteorological after being repaired in the case that edge and conductor are intact.The usual section very little of conductor, from Load-carrying properties are poor, and especially in use, since load-carrying properties are poor under not buried operating mode, cable own wt can cause cable Cable conductor is broken, while is also easily damaging tiny cable conductor in construction.Anti-interference is poor, is conveyed in itself when cable When containing higher harmonic components in electric current, cable can generate electromagnetic interference to surrounding electronic equipment；Conversely, extraneous electromagnetism Interference can also be coupled on cable core, pair various electrical generation electromagnetic interferences to connect with cable.

Utility model content

The technical problem to be solved by the present invention is to provide a kind of shell-less fire resistant low-voltage cables.

A kind of shell-less fire resistant low-voltage cable described in the utility model, including garland formula core, in garland formula Wrapped low-smoke bittern-free highly fire-proof binding tape is overlapped outside core, copper strip shielding layer is extruded outside low-smoke bittern-free highly fire-proof binding tape, The fireprotection layer that three layers of flameproof fabric overlap is extruded outside copper strip shielding layer, the plastic bellows of high temperature resistant is cased with outside fireprotection layer； Garland formula high temperature resistant of the garland formula core by four round insulation cores and co-extrusion outside four round insulation cores Ceramic tube is formed；The center of the refractory ceramics pipe is equipped with heat emission hole.

The insulated wire cores are made of aluminium conductor and the high-temperature resistant rubber insulating layer being extruded in outside aluminium conductor.

The heat emission hole is diamond shape, circle or rectangular.

The beneficial effects of the utility model are：

1st, the utility model has very strong from load-carrying properties, changes more original core twisted synthesizing cable cored structures, So that the stress point of cable is concentrated on single line core, it is not easily broken；

2nd, the utility model is overlapped wrapped low-smoke bittern-free highly fire-proof binding tape outside garland formula core, not only so that cable tool There is fire-resistant, be preferably filled with the irregular gap of core, also secure core and be not easy to change；

3rd, the utility model is equipped with copper strip shielding layer, can make shielding line and use as the neutral conductor or ground wire, be applicable in In ac rated voltage 0.6/1kV and the anti-power transmission compared under strong electromagnetic, lightning stroke environment claimed below, cable is enhanced Anti-interference, extraneous electromagnetic interference will not be coupled on cable core, and what is pair connected with cable various will not electrically produce Raw electromagnetic interference；

4th, flameproof fabric and the plastic bellows of high temperature resistant are externally provided in the utility model cable so that fireproofing of cable reaches Optimum performance, high temperature resistant plastic bellows have a high tenacity, high-impact, good bending property, high-temperature resistant, acidproof, lubricating oil, cold But performances such as liquid, resistant to chemical etching, fire-retardant, can bear the weight that foot is stepped on, not broken, indeformable, can restore rapidly, and Itself is without any damage.

5th, equipped with garland formula refractory ceramics pipe, heat-resisting quantity and impact resistance, and with good toughness, resistance to mechanical Thermal shock resistance properties is excellent, and is equipped with heat emission hole at the center of ceramic tube, greatly reduces the temperature in core.

Description of the drawings

Fig. 1 is the structure diagram of the utility model.

Specific embodiment：

As shown in Figure 1, a kind of shell-less fire resistant low-voltage cable described in the utility model, including garland formula line Core is overlapped wrapped low-smoke bittern-free highly fire-proof binding tape 5 outside garland formula core, copper is extruded outside low-smoke bittern-free highly fire-proof binding tape Band shielded layer 6, the fireprotection layer 7 that three layers of flameproof fabric overlap is extruded outside copper strip shielding layer, resistance to height is cased with outside fireprotection layer Thermometer bulb moulds bellows 8；The garland formula core is by four round insulation cores and co-extrusion outside four round insulation cores Garland formula refractory ceramics pipe 3 form；The insulated wire cores are by aluminium conductor 1 and the high temperature resistant rubber being extruded in outside aluminium conductor Glue insulating layer 2 is formed.The center of the refractory ceramics pipe is equipped with heat emission hole 4, which is diamond shape, circle or rectangular.

The utility model provides the form and implementation of shell-less fire resistant low-voltage cable, and the above is only The preferred implementation method of the utility model, it is noted that for those skilled in the art, do not departing from this Under the premise of utility model principle, several improvement can also be made, these improvement also should be regarded as the scope of protection of the utility model.

Claims

1. a kind of shell-less fire resistant low-voltage cable, it is characterised in that：Including garland formula core, the weight outside garland formula core Lap wound packet low-smoke bittern-free highly fire-proof binding tape, extrudes copper strip shielding layer, in copper strip shielding outside low-smoke bittern-free highly fire-proof binding tape Layer is outer to extrude the fireprotection layer that three layers of flameproof fabric overlap, and the plastic bellows of high temperature resistant is cased with outside fireprotection layer；The flower Garland formula refractory ceramics pipe structure of the ring type core by four round insulation cores and co-extrusion outside four round insulation cores Into；The center of the refractory ceramics pipe is equipped with heat emission hole.

2. shell-less fire resistant low-voltage cable according to claim 1, it is characterised in that：The insulated wire cores by Aluminium conductor and the high-temperature resistant rubber insulating layer being extruded in outside aluminium conductor are formed.

3. shell-less fire resistant low-voltage cable according to claim 1, it is characterised in that：The heat emission hole is water chestnut Shape, circle or rectangular.