CN217822174U

CN217822174U - Low-voltage aluminum alloy low-smoke insulated cable

Info

Publication number: CN217822174U
Application number: CN202221248108.9U
Authority: CN
Inventors: 黄美华
Original assignee: CHONGQING KEBAO CABLE CO LTD
Current assignee: CHONGQING KEBAO CABLE CO LTD
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-11-15
Anticipated expiration: 2032-05-23

Abstract

The utility model discloses a low pressure aluminum alloy low smoke insulation cable, relates to the cable field, the technical scheme of the utility model comprises a cable core and a functional protection layer, the cable core is provided with a plurality of roots; the cable is characterized in that flame-retardant high-temperature filling ropes are filled between the cable cores, and magnesium oxide powder is attached to the flame-retardant high-temperature filling ropes. The flame-retardant cable has a good flame-retardant effect, can avoid further diffusion of fire when the fire happens, and is very suitable for aluminum alloy cables with multiple cable cores.

Description

Low-voltage aluminum alloy low-smoke insulated cable

Technical Field

The utility model relates to a low pressure aluminum alloy low smoke insulation cable mainly relates to the cable field.

Background

The aluminum alloy cable with multiple cable cores needs to pay special attention to the flame retardant property, and because when a fire condition occurs on one cable core, the aluminum alloy cable can easily spread to other cable cores, and a short circuit or a short circuit occurs for a long time, so that how to reduce the spread fire condition of the aluminum alloy cable with multiple cable cores to other cable cores is the technical problem to be solved by the technical scheme.

SUMMERY OF THE UTILITY MODEL

The utility model provides a low pressure aluminum alloy low smoke insulation cable, very good flame retardant efficiency has, can avoid the further diffusion of condition of a fire when the condition of a fire takes place, the aluminum alloy cable of especially adapted multicore cable core.

In order to achieve the above purpose, the technical scheme of the utility model is that: the cable comprises a cable core and a functional protection layer, wherein a plurality of cables are arranged on the cable core; the cable is characterized in that flame-retardant high-temperature filling ropes are filled between the cable cores, and magnesium oxide powder is attached to the flame-retardant high-temperature filling ropes.

The technical principle and the beneficial effects of the utility model are as follows:

this scheme adopts fire-retardant high temperature packing rope, can fill the clearance between the cable core on the one hand, keep the degree of fullness of cable core, on the other hand filler has fine flame retardant efficiency, can alleviate the condition of a fire to a certain extent, the magnesia powder has highly fire-resistant insulating properties, can play the inside effect of packing simultaneously, fire-retardant high temperature packing rope oxygen has good fire retardance, play fire-retardant effect, can avoid one of them cable core to take place after the condition of a fire, stretch to other cable cores.

This scheme has very good flame retardant efficiency, can avoid the further diffusion of condition of a fire when the condition of a fire takes place, the aluminum alloy cable of especially adapted many cable cores.

Preferably, the flame retardant high temperature filling rope oxygen index is not less than 40%. To ensure that a sufficient flame retardant effect can be provided.

Preferably, the cable core comprises a conductor, a fire-resistant layer and an insulating layer from inside to outside in sequence. The flame retardant coating can be to a certain extent to the heat-resisting effect of playing of inner conductor heating, avoid outwards arousing other cable cores to take place the condition of a fire.

Preferably, the fire-resistant layer is formed by covering a multilayer synthetic mica tape. Mica has very good heat resistance performance.

Preferably, the functional protection layer comprises an isolation layer, a belting layer, an inner protection layer, an armor layer and an outer protection layer from inside to outside in sequence. Wherein interior sheath user keeps apart belting layer and armor, avoids armor and belting layer direct contact to take place wearing and tearing.

Preferably, the isolating layer is mineral magnesium oxide mixed inorganic matter. The gap filling of the cable core wire is compact, the whole cable core is coated, and the thickness is not less than 4 mm.

Preferably, the wrapping band layer is made of a low smoke zero halogen and glass fiber band composite material. It is non-combustible. The thickness is greater than 1mm.

Preferably, the inner protection layer is made of a low-smoke halogen-free material with an oxygen index larger than 38. Its thickness is greater than 2.0 mm. The cable is made of temperature-resistant and inorganic materials, and achieves the performances of flame retardance, no drop and no toxin.

Preferably, the armor layer adopts double-layer steel strips. The cable is provided with mechanical performance, and simultaneously, insects such as mice and the like can be prevented from being bitten, so that the cable is used in places such as direct burial, tunnels and the like. The thickness is 0.5-1mm.

Preferably, the outer protective layer is made of a low-smoke halogen-free material with an oxygen index larger than 38, and when the cable burns, only light water mist exists, and the visible distance is more than 60 meters. The thickness of the outer protective layer and the inner protective layer is larger than 2mm.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only one of the drawings of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

The cable comprises a conductor 1, a fire-resistant layer 2, an insulating layer 3, an isolating layer 4, a belting layer 5, an inner protection layer 6, an armor layer 7 and an outer protection layer 8.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely preferred embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in fig. 1, the embodiment of the present invention includes a cable core and a functional protection layer, wherein the cable core is provided with a plurality of cable cores; and flame-retardant high-temperature filling ropes are filled between the cable cores, and magnesium oxide powder is attached to the flame-retardant high-temperature filling ropes.

In the embodiment, the cable cores are five, in order to facilitate the twisting of the cable cores, the tensile wire cores are arranged in the middle, and the five cable cores are twisted on the periphery of the tensile wire cores.

The magnesium oxide powder has high fireproof and insulating properties, can play a role in filling the interior, and the flame-retardant high-temperature filling rope oxygen has good flame retardance and plays a role in flame retardance.

The oxygen index of the flame-retardant high-temperature filling rope is not less than 40%. To ensure that a sufficient flame retardant effect can be provided.

The cable core comprises a conductor 1, a fire-resistant layer 2 and an insulating layer 3 from inside to outside in sequence. The flame retardant coating 2 can generate heat to the inner conductor 1 to a certain extent, so that the fire condition of other cable cores is avoided.

The fire-resistant layer 2 is formed by covering a plurality of layers of synthetic mica tape. Mica has very good heat resistance performance, and the thickness of the inner fire layer is not less than 0.2mm. The insulating layer 3 is made of ethylene chlorotrifluoroethylene copolymer and has a thickness of not less than 2mm.

The functional protective layer comprises an isolation layer 4, a belting layer 5, an inner protective layer 6, an armor layer 7 and an outer protective layer 8 from inside to outside in sequence. Wherein the inner sheath 6 isolates the belting layer 5 from the armor layer 7 by a user, avoiding the armor layer 7 from being worn out by direct contact with the belting layer 5.

The isolating layer 4 is made of a mineral magnesium oxide mixed inorganic substance. The gap filling of the cable core wire is compact, the whole cable core is coated, and the thickness is not less than 4 mm.

The wrapping band layer 5 is made of a low-smoke halogen-free glass fiber band composite material. It is non-combustible. The thickness is greater than 1mm.

The inner protective layer 6 is made of a low-smoke halogen-free material with an oxygen index larger than 38. Its thickness is greater than 2.0 mm. The cable has flame retardant, no-drip and no-toxin properties.

The armor layer 7 adopts a double-layer steel belt. The cable is provided with mechanical performance, and simultaneously, insects such as mice and the like can be prevented from being bitten, so that the cable is used in places such as direct burial, tunnels and the like. The thickness is 0.5-1mm.

The outer jacket 8 is made of a low-smoke halogen-free material with an oxygen index larger than 38, and when the cable burns, only light water mist exists, and the visible distance is more than 60 meters. The thickness of the outer sheath 8 and the inner sheath 6 is more than 2mm.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-voltage aluminum alloy low-smoke insulated cable comprises a cable core and a functional protection layer, wherein a plurality of cable cores are arranged; the cable is characterized in that flame-retardant high-temperature filling ropes are filled between the cable cores, and magnesium oxide powder is attached to the flame-retardant high-temperature filling ropes.

2. A low pressure aluminum alloy low smoke insulated cable as claimed in claim 1, characterized in that: the oxygen index of the flame-retardant high-temperature filling rope is not less than 40%.

3. A low pressure aluminum alloy low smoke insulated cable according to claim 1, characterized in that: the cable core comprises a conductor, a fire-resistant layer and an insulating layer from inside to outside in sequence.

4. A low pressure aluminum alloy low smoke insulated cable according to claim 3, characterized in that: the fire-resistant layer is formed by covering a plurality of layers of synthetic mica tape lapping covers.

5. A low pressure aluminum alloy low smoke insulated cable as claimed in claim 1, characterized in that: the functional protective layer comprises an isolation layer, a belting layer, an inner protective layer, an armor layer and an outer protective layer from inside to outside in sequence.

6. A low pressure aluminum alloy low smoke insulated cable as claimed in claim 5, characterized in that: the isolation layer is made of a mineral magnesium oxide mixed inorganic substance.

7. A low pressure aluminum alloy low smoke insulated cable as claimed in claim 5, characterized in that: the wrapping band layer is made of low-smoke halogen-free glass fiber band composite materials.

8. A low pressure aluminum alloy low smoke insulated cable of claim 5, characterized in that: the inner protective layer is made of a low-smoke halogen-free material with an oxygen index larger than 38.

9. A low pressure aluminum alloy low smoke insulated cable as claimed in claim 5, characterized in that: the armor layer adopts double-layer steel strips.

10. A low pressure aluminum alloy low smoke insulated cable of claim 5, characterized in that: the outer protective layer is made of a low-smoke halogen-free material with an oxygen index larger than 38.