CN214152534U

CN214152534U - Fireproof cable

Info

Publication number: CN214152534U
Application number: CN202022854726.5U
Authority: CN
Inventors: 罗文忠; 罗健
Original assignee: Shenzhen Xindufeng Electronic Co ltd
Current assignee: Shenzhen Xindufeng Electronic Co ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-09-07
Anticipated expiration: 2030-12-01

Abstract

The utility model relates to a fireproof cable relates to the field of cable technology, and it includes the cable core, and the periphery relatively fixed of cable core is provided with fire-retardant layer, and fire-retardant layer is hollow design, and the inside packing on fire-retardant layer has highly compressed inert gas. This application has better fire behavior's effect.

Description

Fireproof cable

Technical Field

The application relates to the field of cable technology, in particular to a fireproof cable.

Background

Cables are currently made of one or more mutually insulated conductors and an outer insulating covering, the conductors carrying power or information from one place to another or cable-like cables generally consisting of several or several groups of conductors twisted together, each group being insulated from one another and usually twisted around a center, the whole being covered with a highly insulating covering. The cable has the characteristics of internal electrification and external insulation.

With the rapid development of economy in China, the scale and speed of various building projects are not developed before, and the higher the buildings are, so that the requirements on electrical equipment are increasingly strict. However, in recent years, there has been an increasing number of fires caused by electricity, wherein the fires are caused by wire and cable.

With respect to the related art described above, the inventors consider that there is a drawback in that the cable in the related art is poor in fireproof performance and easily causes a fire situation.

SUMMERY OF THE UTILITY MODEL

In order to improve the poor problem of cable fire behavior, this application provides a fireproof cable.

The application provides a fireproof cable adopts following technical scheme:

the fireproof cable comprises a cable core, wherein a flame-retardant layer is relatively and fixedly arranged on the periphery of the cable core, the flame-retardant layer is hollow, and high-pressure inert gas is filled in the flame-retardant layer; a heat insulation layer is fixedly arranged between the flame-retardant layer and the cable core; the periphery department parcel of cable core has the protective layer, and the protective layer deviates from the fixed a plurality of fixture blocks that are provided with of periphery department of cable core, and the fixture block evenly sets up along the circumference of protective layer, and a plurality of draw-in grooves have been seted up to one side that the insulating layer is close to the cable core, and the draw-in groove is fixed with the fixture block joint.

By adopting the technical scheme, when the flame-retardant layer is burnt through, the inert gas in the flame-retardant layer is sprayed out under the action of high pressure, covers the burning through position of the flame-retardant layer and is attached to the position close to the burning through position, so that the extension of flame can be reduced, and the overall fire resistance of the cable is improved; the cost is low, the overall quality of the cable is not excessively improved, the fireproof performance of the cable is effectively improved, the quality of the cable is small, and the construction of the cable is facilitated; due to the arrangement of the heat insulation layer, when the cable is in a high-temperature environment, the cable core and the protective layer are not easily damaged by high temperature, and the normal operation capability of the cable in the high-temperature environment is improved; the arrangement of the clamping groove and the clamping block can reduce circumferential relative sliding between the protective layer and the heat insulation layer, so that the cable is not easy to generate a gap in the installation or placement process due to twisting, the tight sealing performance of the cable is improved, and the waterproof performance and the service life of the cable are indirectly improved.

Preferably, a waterproof layer is wrapped and fixed on one side, close to the cable core, of the flame-retardant layer.

Through adopting above-mentioned technical scheme, can effectually play better sealed effect to waterproof layer inside, reduced inside moisture gets into the waterproof layer to reduce the corruption of moisture to the insulating layer, reduced the ageing speed of insulating layer, thereby guaranteed the thermal-insulated effect of insulating layer.

Preferably, one side of the flame-retardant layer, which is far away from the cable core, is fixedly provided with a heat-resistant layer.

Through adopting above-mentioned technical scheme, the heat-resistant layer has increased the fire-resistant temperature of cable, has insulated the temperature effect, and because the material quality who adopts is light, and the texture is soft, has alleviateed the holistic weight of cable for the cable is installed easily and is laid and crooked, and the transportation is convenient.

Preferably, an adhesive layer is fixedly arranged between the heat-resistant layer and the heat-insulating layer.

By adopting the technical scheme, the setting of the adhesive layer can improve the fixing strength between the heat-resistant layer and the waterproof layer.

Preferably, the heat-resistant layer is provided with a groove around the inner periphery of the flame-retardant layer, and the groove is in butt fit with the adhesive layer.

Through adopting above-mentioned technical scheme, the area of contact of heat-resistant layer and adhesive layer has been improved to the setting of recess on the heat-resistant layer for bonding between heat-resistant layer and the adhesive layer is more stable.

Preferably, one side of the heat-resistant layer, which is far away from the cable core, is fixedly provided with an anti-abrasion layer.

Through adopting above-mentioned technical scheme, the setting on abrasionproof layer plays wear-resisting, the insulating effect that adds good to whole fireproof cable's outer layer, also can tentatively provide the fire protection barrier to the cable simultaneously.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the flame-retardant layer is arranged, so that under the condition that the cost is low but the weight of the cable is not increased, a better fireproof flame-retardant effect can be effectively achieved when the cable is burnt, the internal structure of the cable is effectively protected, and the cable can be better operated;

2. due to the arrangement of the waterproof layer, the corrosion of water vapor to the cable is effectively reduced, and the stability of each function of the cable layer is ensured;

3. the arrangement of the heat insulation layer reduces the heat entering the interior of the cable core, so that the cable core can still maintain good operation in a high-temperature environment.

Drawings

Fig. 1 is a schematic circumferential sectional structure of the fireproof cable in the embodiment.

Description of reference numerals: 1. a cable core; 2. a protective layer; 21. a clamping block; 3. a thermal insulation layer; 31. a card slot; 4. a flame retardant layer; 5. a waterproof layer; 6. an adhesive layer; 7. a heat-resistant layer; 71. a groove; 8. and a wear-resistant layer.

Detailed Description

The present application is described in further detail below with reference to fig. 1.

The embodiment of the application discloses a fireproof cable.

Referring to fig. 1, the fireproof cable comprises a cable core 1, a protective layer 2, a heat insulation layer 3, a waterproof layer 5, a flame retardant layer 4, an adhesive layer 6, a heat-resistant layer 7 and an anti-abrasion layer 8 which are sequentially arranged from inside to outside.

Referring to fig. 1, the protective layer 2 is wrapped and fixed at the periphery of the cable core 1, and the material for setting the protective layer 2 in this embodiment is: the cross-linked polyethylene mixed polyester non-woven fabric. The cross-linked polyethylene has strong acid and alkali resistance and oil resistance, excellent insulating property and little influence of temperature, and the polyester non-woven fabric has the advantages of excellent reinforcement protection, freezing resistance and corrosion resistance. The protective layer 2 can effectively protect the cable core 1 and reduce corrosion or mechanical damage to the cable core 1.

Referring to fig. 1, the thermal insulation layer 3 is bonded and fixed to the protective layer 2, and the thermal insulation layer 3 is made of mica tape bonded aluminum foil in this embodiment. Mica tape has insulating, high temperature resistant, advantage that the heat-proof quality is good, and the aluminium foil has waterproof, corrosion-resistant and metallic shield's effect, and insulating layer 3 that mica tape and aluminium foil combination were made has better heat-proof effect, and difficult corruption harm simultaneously can effectual protection inside cable core 1. Due to the arrangement of the heat insulation layer 3, when the cable is in a high-temperature environment, the cable core 1 and the protective layer 2 are not easily damaged by high temperature, and the normal operation capability of the cable in the high-temperature environment is improved.

Referring to fig. 1, protective layer 2 deviates from the fixed a plurality of fixture blocks 21 that are provided with of periphery department of cable core 1, and fixture block 21 evenly sets up along protective layer 2's circumference, and fixture block 21 is towards the shape that deviates from the direction size constantly-increasing of cable core 1, and a plurality of draw-in grooves 31 have been seted up to one side that insulating layer 3 is close to cable core 1, and draw-in groove 31 is fixed with the fixture block 21 joint. Draw-in groove 31 and fixture block 21's setting can reduce to produce circumferential relative slip between protective layer 2 and the insulating layer 3 for the cable is at the installation or the in-process of placing, is difficult for making inside production gap because of the wrench movement, has improved the inseparable leakproofness of cable, thereby indirect waterproof performance and the life who has improved the cable.

Referring to fig. 1, waterproof layer 5 bonds and fixes in the periphery department of insulating layer 3, and the material that this embodiment set up waterproof layer 5 is silicon rubber, and silicon rubber is corrosion-resistant, cold-resistant heat-resisting and resistant atmospheric aging, can effectually play better sealed effect to waterproof layer 5 inside, has reduced inside moisture gets into waterproof layer 5 to reduce the corruption of moisture to insulating layer 3, reduced insulating layer 3's ageing speed, thereby guaranteed insulating layer 3's thermal-insulated effect.

Referring to fig. 1, fire-retardant layer 4 is fixed with waterproof layer 5's periphery department bonding, fire-retardant layer 4 is hollow shell structure, the inside packing of fire-retardant layer 4 has inert gas, the material that this embodiment set up fire-retardant layer 4 is fluororubber, inert gas is carbon dioxide, carbon dioxide chemical property is stable, it is difficult for fire, be difficult for puncturing and density than the extension of air big can effectual reduction flame, when fire-retardant layer 4 is burnt, inert gas in fire-retardant layer 4 spouts under highly compressed effect, cover in fire-retardant layer 4 department of burning, and adhere to in near burning the position, thereby can reduce the extension of flame, the holistic fire behavior of cable has been improved. The setting on fire-retardant layer 4, it is with low costs, and can not too improve the whole quality of cable, in effectual improvement cable fire behavior for the cable quality is less, has been convenient for the construction of cable.

Referring to fig. 1, the material that this embodiment set up adhesive layer 6 is organosilicon casting glue, organosilicon casting glue has the waterproof performance and the insulating properties that add, very be fit for as the adhesive of waterproof cable, heat-resistant layer 7 is fixed with fire-retardant layer 4 bonding through adhesive layer 6, this embodiment sets up the material of heat-resistant layer 7 and bonds the aluminium foil after ceramic fiber paper back bonding glass fiber cloth again and constitutes, through this technology processing back, the great enhancement of toughness of ceramic fiber paper, the fire-resistant temperature of cable has been increased, separate the temperature effect, and because the material quality who adopts is light, soft texture, the holistic weight of cable has been alleviateed, make the cable install easily and lay and crooked, the transportation is convenient.

Referring to fig. 1, a plurality of grooves 71 are formed in the circumferential inner wall of one side, close to the flame-retardant layer 4, of the heat-resistant layer 7, the grooves 71 are uniformly arranged at intervals along the circumferential direction of the heat-resistant layer 7, the grooves 71 are in butt fit with the adhesive layer 6, and the grooves 71 are in a shape that the opening gradually reduces towards the direction away from the waterproof layer 5. An operator firstly coats organic silicon rubber on the periphery of the waterproof layer 5, then sleeves the heat-resistant layer 7 on the waterproof layer 5, and then fills organic silicon pouring sealant into a gap between the heat-resistant layer 7 and the waterproof layer 5, so that the heat-resistant layer 7 is fixed on the periphery of the waterproof layer 5 through the adhesive layer 6. The arrangement of the groove 71 on the heat-resistant layer 7 improves the bonding area between the heat-resistant layer 7 and the adhesive layer 6, so that the bonding between the adhesive layer 6 and the heat-resistant layer 7 is more stable.

Referring to fig. 1, 8 bonds and fixes in the outside of heat-resistant layer 7 on the abrasionproof layer, and the material that this embodiment set up abrasionproof layer 8 is the polyolefin, and polyolefin low price, wear-resisting and easy machine-shaping are fit for very much as the abrasionproof layer 8 in the cable outside, and the setting of abrasionproof layer 8 plays better wear-resisting, insulating effect to whole fireproof cable's skin, also can be preliminary plays certain fire prevention effect simultaneously.

According to the arrangement sequence and the material of the cable layers in the embodiment, the fireproof and flame-retardant performance of the cable can be effectively improved through the design of the heat insulation layer 3, the flame-retardant layer 4 and the heat-resistant layer 7 on the outer layer of the cable core 1, and the internal damage of the cable core 1 under the high-temperature condition is reduced; protective layer 2, abrasionproof layer 8 set up can effectually provide better guard action to the daily use of cable to waterproof layer 5's setting has reduced that steam infiltration advances the influence of cable layer inside to each layer of functionality of cable. To sum up, this application has better fire prevention effect, can make the cable be difficult for receiving the harm of high temperature.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A fire-resistant cable, characterized in that: the cable comprises a cable core (1), wherein a flame-retardant layer (4) is relatively and fixedly arranged on the periphery of the cable core (1), the flame-retardant layer (4) is hollow, and high-pressure inert gas is filled in the flame-retardant layer (4);

a heat insulation layer (3) is fixedly arranged between the flame-retardant layer (4) and the cable core (1);

the outer periphery department parcel of cable core (1) has protective layer (2), and protective layer (2) deviates from the fixed a plurality of fixture blocks (21) that are provided with of outer periphery department of cable core (1), and fixture block (21) evenly set up along the circumference of protective layer (2), and a plurality of draw-in grooves (31) have been seted up to one side that insulating layer (3) are close to cable core (1), and draw-in groove (31) are fixed with fixture block (21) joint.

2. A fire-resistant cable according to claim 1, wherein: and a waterproof layer (5) is wrapped and fixed on one side of the flame-retardant layer (4) close to the cable core (1).

3. A fire-resistant cable according to claim 1, wherein: and a heat-resistant layer (7) is fixedly arranged on one side of the flame-retardant layer (4) departing from the cable core (1).

4. A fire-resistant cable according to claim 3, wherein: an adhesive layer (6) is fixedly arranged between the heat-resistant layer (7) and the flame-retardant layer (4).

5. A fire-resistant cable according to claim 3, wherein: the heat-resistant layer (7) is close to the inner periphery of the flame-retardant layer (4) and is wound with a groove (71), and the groove (71) is in butt fit with the adhesive layer (6).

6. A fire-resistant cable according to claim 3, wherein: and an anti-abrasion layer (8) is fixedly arranged on one side of the heat-resistant layer (7) departing from the cable core (1).