CN215220338U - Fireproof flame-retardant cable - Google Patents

Abstract

The embodiment of the utility model discloses a fireproof flame-retardant cable, which comprises a plurality of conductors, an insulating layer, a wrapping tape layer, a fire-resistant layer and an outer sheath layer, wherein the fire-resistant layer comprises a fire-resistant metal forming layer and an extruded ceramic heat-insulating layer; the conductor is positioned in the accommodating space of the wrapping tape layer, the outer surface of the conductor is covered with an insulating layer, the outer surface of the wrapping tape layer is covered with a refractory metal layer, the outer surface of the refractory metal layer is covered with an extruded ceramic thermal insulation layer, and the outer surface of the extruded ceramic thermal insulation layer is covered with an outer sheath layer; be provided with first arch on the surface of insulating layer, the second protruding and with the protruding second recess of looks adaptation of second, be provided with on the internal surface of accommodation space with first protruding assorted first recess, adjacent insulating layer passes through second arch and second recess joint, insulating layer and accommodation space are through first arch and first recess joint, be provided with the cooling tube in the accommodation space, the fire prevention flame retardant efficiency who has solved present zero halogen low smoke fire resisting cable is poor not enough.

Description

Fireproof flame-retardant cable

Technical Field

The embodiment of the application relates to the field of cables, in particular to a fireproof flame-retardant cable.

Background

At present, with the continuous development of scientific technology, the development of information technology and power technology is rapidly advanced. In order to realize the transmission of information and power, cables need to be wired in a building. The cable is used as a channel for power and information transmission and is mainly laid in indoor places such as commercial districts, residential districts and industrial districts in the wiring process. However, once a fire occurs in a room, the fire rapidly spreads and expands along with the wiring of the cable, which not only causes obstacles to the transmission of information and power, but also seriously endangers the life safety and property safety of human beings.

In order to solve the problem of flammability of cables, halogen-free low-smoke fire-resistant cables are generally adopted as indoor cables for laying at present. However, the existing halogen-free low-smoke fire-resistant cable is complex in production process, high in cost, poor in flexibility, poor in fire resistance at high temperature, short in fire resistance time, poor in anti-seismic performance at high temperature of a fire-resistant layer formed by a ceramic material, and easy to pulverize due to water spraying, so that the existing halogen-free low-smoke fire-resistant cable is poor in fireproof and flame-retardant effects.

Disclosure of Invention

The embodiment of the utility model provides a fire prevention flame retarded cable, through including fire-resistant one-tenth metal level and crowded package pottery insulating layer at the flame retardant coating setting, improved the fire prevention flame retardant efficiency of cable, solved among the prior art halogen-free low smoke fire resistant cable's the fire prevention flame retardant efficiency than poor technical problem.

An embodiment of the utility model provides a fire prevention flame retarded cable, include: the cable comprises a plurality of conductors, an insulating layer, a wrapping tape layer, a fire-resistant layer and an outer sheath layer, wherein the fire-resistant layer comprises a fire-resistant metal forming layer and an extruded ceramic thermal insulation layer;

the conductor is positioned in the accommodating space of the wrapping tape layer, the outer surface of the conductor is covered with the insulating layer, the outer surface of the wrapping tape layer is covered with the fireproof metal forming layer, the outer surface of the fireproof metal forming layer is covered with the extruded ceramic thermal insulation layer, and the outer surface of the extruded ceramic thermal insulation layer is covered with the outer sheath layer; be provided with first arch, second arch on the surface of insulating layer and with the second recess of the protruding looks adaptation of second, be provided with on the internal surface of accommodation space with first protruding assorted first recess, adjacent insulating layer passes through the second is protruding and second recess joint, the insulating layer with the accommodation space passes through first arch and first recess joint, still be provided with the cooling tube in the accommodation space.

Preferably, the wrapping tape layer is a ceramic silicon rubber fire-resistant composite tape layer.

Preferably, the accommodating space is filled with a filling material.

Preferably, the filler material is alkali-free glass fiber.

Preferably, the extruded ceramic heat insulation layer is a ceramic silicon rubber material layer.

Preferably, the refractory metal forming layer is a double layer steel belt layer.

Preferably, the fireproof flame-retardant cable further comprises a high oxygen index oxygen-isolating layer, the high oxygen index oxygen-isolating layer covers the outer surface of the wrapping tape layer, and the outer surface of the high oxygen index oxygen-isolating layer is covered with the fireproof metal forming layer.

Preferably, the high oxygen index oxygen barrier layer is a ceramic silicon rubber composite belt layer.

Preferably, the outer sheath layer is a ceramic halogen-free low-smoke polyolefin flame-retardant fire-resistant sheath layer.

Preferably, the number of the radiating pipes is two.

An embodiment of the utility model provides a fire prevention flame retarded cable, include: the cable comprises a plurality of conductors, an insulating layer, a wrapping tape layer, a fire-resistant layer and an outer sheath layer, wherein the fire-resistant layer comprises a fire-resistant metal forming layer and an extruded ceramic thermal insulation layer; the conductor is positioned in the accommodating space of the wrapping tape layer, the outer surface of the conductor is covered with an insulating layer, the outer surface of the wrapping tape layer is covered with a refractory metal layer, the outer surface of the refractory metal layer is covered with an extruded ceramic thermal insulation layer, and the outer surface of the extruded ceramic thermal insulation layer is covered with an outer sheath layer; the outer surface of the insulating layer is provided with a first bulge, a second bulge and a second groove matched with the second bulge, the inner surface of the accommodating space is provided with a first groove matched with the first bulge, the adjacent insulating layer is clamped with the second groove through the second bulge, the insulating layer and the accommodating space are clamped with the first groove through the first bulge, and the accommodating space is internally provided with a radiating pipe. Through fire-resistant one-tenth metal level and crowded package pottery insulating layer in the flame retardant coating setting, improved the fire prevention flame retardant efficiency of cable, solved among the prior art halogen-free low smoke fire resisting cable's the fire prevention flame retardant efficiency than poor technical problem.

Drawings

Fig. 1 is a schematic structural view of a fireproof flame-retardant cable provided by an embodiment of the present invention.

Fig. 2 is a schematic structural view of another fireproof flame-retardant cable provided by an embodiment of the present invention.

Fig. 3 is a partial enlarged view of an insulating layer of a fireproof flame-retardant cable according to an embodiment of the present invention.

Fig. 4 is the embodiment of the utility model provides a fire prevention flame retarded cable's around local enlargements of band layer.

Fig. 5 is a schematic structural view of another fireproof flame-retardant cable according to an embodiment of the present invention.

In the figure: 1-conductor, 2-insulating layer, 3-wrapping band layer, 4-fireproof metal forming layer, 5-extruded ceramic heat insulation layer, 6-outer sheath layer, 7-high oxygen index oxygen isolation layer, 8-first protrusion, 9-second protrusion, 10-first groove, 11-second groove, 12-radiating pipe and 13-filling material.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad embodiments of the invention. It should be further noted that, for convenience of description, only some structures, but not all structures, related to the embodiments of the present invention are shown in the drawings.

The embodiment of the utility model provides a fire prevention flame retarded cable mainly is to 10kV medium voltage cable and 1kV and following voltage class's low tension cable, and when fire prevention flame retarded cable is 1kV and following voltage class's low tension cable, fire prevention flame retarded cable's structure is as shown in figure 1, and figure 1 is the embodiment of the utility model provides a fire prevention flame retarded cable's structural schematic diagram, include: four conductors 1, insulating layer 2, around band layer 3, flame retardant coating and oversheath layer 6, the flame retardant coating includes fire-resistant one-tenth metal level 4 and crowded package pottery insulating layer 5. When the fireproof flame-retardant cable is a 10kV medium-voltage cable, the structure of the fireproof flame-retardant cable is shown in fig. 2, and in fig. 2, the number of the conductors 1 is 3.

The conductor 1 is positioned in the accommodating space of the wrapping tape layer 3, the outer surface of the conductor 1 is covered with the insulating layer 2, the outer surface of the wrapping tape layer 3 is covered with the fire-resistant metal forming layer 4, the outer surface of the fire-resistant metal forming layer 4 is covered with the extruded ceramic heat-insulating layer 5, and the outer surface of the extruded ceramic heat-insulating layer 5 is covered with the outer sheath layer 6; be provided with first arch 8 on insulating layer 2's the surface, the second is protruding 9 and with the second recess 11 of the protruding 9 looks adaptations of second, be provided with on the internal surface of accommodation space with first protruding 8 assorted first recesses 10, adjacent insulating layer 2 is through the protruding 9 of second and the 11 joints of second recess, insulating layer 2 and accommodation space are through first protruding 8 and the 10 joints of first recess, still are provided with cooling tube 12 in the accommodation space.

In this embodiment, the surface of conductor 1 covers there is insulating layer 2, and conductor 1 is located the accommodation space around band layer 3, and it is loose to prevent around band layer 3 conductor 1 to can protect insulating layer 2 not damaged by the armour when the cable armor, play buffering and liner effect, in the use of cable, different materials can play thermal-insulated, or anticorrosive and different effects such as ageing-resistant around the band. Moreover, in this embodiment, as shown in fig. 3 and 4, a first protrusion 8, a second protrusion 9 and a second groove 11 matched with the second protrusion 9 are arranged on the outer surface of the insulating layer 2, a first groove 10 matched with the first protrusion 8 is arranged on the inner surface of the accommodating space, the adjacent insulating layers 2 are clamped by the second protrusion 9 and the second groove 11, the insulating layer 2 and the accommodating space are clamped by the first protrusion 8 and the first groove 10, the insulating layers 2 of the conductors 1 are clamped by the second protrusion 9 and the second groove 11, and the insulating layers 2 and the inner surfaces of the accommodating spaces are clamped by the first protrusion 8 and the first groove 10, so that the structure of the cable is more stable, the shock resistance of the cable is improved, even if the cable is subjected to larger vibration during transportation, the conductors 1 in the cable will not be displaced or loosened due to the vibration, the cable can be ensured to be normally used. It is understood that the shapes of the first protrusion 8 and the second protrusion 9 can be set according to actual needs, for example, the shapes of the first protrusion 8 and the second protrusion 9 are set to be rectangles, or the shapes of the first protrusion 8 and the second protrusion 9 are set to be triangles, and the specific shapes of the first protrusion 8 and the second protrusion 9 are not limited in this embodiment.

In this embodiment, the fire-resistant layer includes fire-resistant metal-forming layer 4 and extruded ceramic thermal insulation layer 5, and fire-resistant metal-forming layer 4 covers the surface around band layer 3, and extruded ceramic thermal insulation layer 5 covers the surface on fire-resistant metal-forming layer 4. Through set up fire-resistant one-tenth metal level 4 and crowded package pottery insulating layer 5 in the flame retardant coating, improved the fire prevention flame retardant efficiency of cable greatly. The ceramic-wrapped heat insulation layer 5 can withstand the flame of combustion, blocks the external high temperature, ensures that the internal structure of the cable is not damaged, and is fireproof to form a metal layer 4 which can prevent the flame from directly contacting the conductor 1 and also plays a role in protecting the conductor 1, so that when a fire disaster occurs, the risk that the cable is damaged due to external force impact is reduced.

In this embodiment, still be provided with cooling tube 12 in the accommodation space to can further improve the heat dispersion of cable, can improve the radiating efficiency of cable when cable normal use or send the conflagration, guarantee the security and the suitability of cable. It is understood that the position of the radiating pipe 12 can be set according to actual needs, and the position of the radiating pipe 12 is not limited in this embodiment. Illustratively, in one embodiment, the radiating pipe 12 is disposed inside the space surrounded by all the conductors 1, so that the radiating pipe 12 can perform a heat radiation function on all the conductors 1, thereby further improving the heat radiation efficiency.

On the basis of the above embodiment, the taped covering 3 is a ceramic silicon rubber fire-resistant composite tape layer. At the in-process around the package becomes the cable, the material that the ordinary cable adopted around the band layer generally is non-woven fabrics or polypropylene tape, leads to around the easy burning of band layer, in this embodiment, adopts the fire-resistant compound band layer of high temperature resistant pottery silicon rubber around band layer 3, can guarantee that conductor 1 of cable can not destroyed when the conflagration takes place.

In the embodiment, the thickness range of the ceramic silicon rubber fire-resistant composite belt layer is 2-4 mm, the electrical insulating property of the ceramic silicon rubber fire-resistant composite belt layer is excellent, and the ceramic silicon rubber fire-resistant composite belt layer has the mechanical property, the electrical property and the elastic property of common silicon rubber when being normally used at normal temperature; when a fire disaster occurs, the ceramic silicon rubber fireproof composite belt layer can be burnt into a hard inorganic substance supporting shell under the combustion of flame, so that a hard protective layer is formed, the protective layer is a loose porous crusting substance, the heat transfer can be effectively prevented, the effects of oxygen isolation, heat insulation and fire blocking are achieved, and the conductor 1 is well protected.

On the basis of the above embodiment, the accommodating space is filled with the filling material 13, and the filling material 13 is alkali-free glass fiber. The alkali-free glass fiber component is SiO2, SiO2 has stable chemical performance, no toxicity and harm, the heat-resisting temperature can reach more than 660 ℃, and harmful gas or smoke can not be generated after heating. After filling alkali-free glass fiber in the accommodation space, form the space passageway between every alkali-free glass fiber, the radiating effect of cable can further be improved to the space passageway, and the heat that produces during cable normal operating, perhaps the heat that external environment conduction came in when the conflagration breaing out can all dispel the heat through the space passageway, avoids the inside high temperature of cable, improves the security of cable.

On the basis of the embodiment, the ceramic heat insulation layer 5 is a ceramic silicon rubber material layer, and the fireproof metal forming layer 4 is a double-layer steel belt layer. When a fire disaster occurs, the ceramic silicon rubber material layer starts to be sintered (catalyzed) after burning for 2-4 min under the condition of flame ablation to generate an isolation layer of a ceramic shell, the isolation layer can effectively prevent flame from continuing to burn, when the temperature of the flame reaches the high temperature of 700-900 ℃, the ceramic shell is further catalyzed to generate SiO2 ceramic, the ceramic shell becomes a flame isolation layer capable of resisting the flame ablation at the high temperature of 700-1300 ℃, and the SiO2 ceramic shell is hard and has certain mechanical property, can resist spraying and mechanical impact on the fire scene, and plays a role in protecting the conductor 1. Under the condition of fire, the ceramic silicon rubber material utilizes an organic silicon chain to combine with a silicon oxide family, catalytic combustion crusting begins to occur at the flame temperature of 500 ℃, and the ceramic silicon rubber material becomes an isolation layer with small specific heat capacity, so that the fire-resistant requirement is met, and the safety of the inner conductor 1 of the cable is ensured under the condition of fire. And double-deck steel tape layer is formed by the coiling of double-deck steel band, can prevent flame direct contact conductor 1 when the conflagration breaing out, has the effect of protection simultaneously to conductor 1, reduces the risk that the cable received external force to strike and leads to the damage when the conflagration breaing out.

On the basis of the above embodiment, as shown in fig. 5, fig. 5 is a schematic structural diagram of another fireproof flame-retardant cable provided by the embodiment of the present invention. The fireproof flame-retardant cable in fig. 5 further comprises a high oxygen index oxygen-isolating layer 7, the high oxygen index oxygen-isolating layer 7 covers the outer surface of the wrapping tape layer 3, the outer surface of the high oxygen index oxygen-isolating layer 7 is covered with a fireproof metal forming layer 4, and the high oxygen index oxygen-isolating layer 7 is a ceramic silicon rubber composite tape layer. The high oxygen index oxygen isolation layer 7 can isolate oxygen, thereby playing a role in flame retardance and reducing the ablation of flame to the cable. In this embodiment, the high oxygen index oxygen barrier layer 7 is a ceramic silicone rubber composite tape layer made of a ceramic silicone rubber material, and has a good protection effect on the conductor 1 by utilizing the characteristics of oxygen barrier, heat insulation and fire blocking of the ceramic silicone rubber material.

On the basis of the above embodiment, the outer sheath layer 6 is a ceramic halogen-free low-smoke polyolefin flame-retardant fire-resistant sheath layer. In this embodiment, oversheath layer 6 is crowded package by the fire-retardant fire-resistant sheath material of ceramic zero halogen low smoke polyolefin and is formed, the fire-retardant fire-resistant sheath material of ceramic zero halogen low smoke polyolefin has good fire behaviour and low smoke and zero halogen performance, all can not produce poisonous flue gas under normal work and conflagration condition, thereby guarantee that indoor personnel can not lead to healthy impaired because of inhaling poisonous flue gas, and the fire-retardant fire-resistant sheath material of ceramic zero halogen low smoke polyolefin's pH value, the luminousness, smoke density, performances such as toxic gas release and heavy metal content all accord with the preparation requirement of cable. In addition, under the ablation of flame, the ceramic halogen-free low-smoke polyolefin flame-retardant fireproof sheath material can generate uniform ceramic micropores, and can play roles in isolating flame and relieving impact.

On the basis of the above embodiment, there are two radiating pipes 12. Thereby further improve the heat dispersion of cable through setting up two cooling tubes 12 to the heat that produces during with the cable normal operating, perhaps the heat that external environment conduction came in when the conflagration breaing out distributes away, avoids the inside high temperature of cable, improves the security and the reliability of cable. In another embodiment, the number of the radiating pipes 12 is provided with a plurality of pipes, it is understood that the number of the radiating pipes 12 can be set according to actual needs.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the embodiments of the present invention are not limited to the particular embodiments described herein, but are capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the embodiments of the invention. Therefore, although the embodiments of the present invention have been described in greater detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments, and many other equivalent embodiments can be included without departing from the concept of the embodiments of the present invention, and the scope of the embodiments of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A fire-resistant, flame-retardant cable, comprising: the cable comprises a plurality of conductors, an insulating layer, a wrapping tape layer, a fire-resistant layer and an outer sheath layer, wherein the fire-resistant layer comprises a fire-resistant metal forming layer and an extruded ceramic thermal insulation layer;

the conductor is positioned in the accommodating space of the wrapping tape layer, the outer surface of the conductor is covered with the insulating layer, the outer surface of the wrapping tape layer is covered with the fireproof metal forming layer, the outer surface of the fireproof metal forming layer is covered with the extruded ceramic thermal insulation layer, and the outer surface of the extruded ceramic thermal insulation layer is covered with the outer sheath layer; be provided with first arch, second arch on the surface of insulating layer and with the second recess of the protruding looks adaptation of second, be provided with on the internal surface of accommodation space with first protruding assorted first recess, adjacent insulating layer passes through the second is protruding and second recess joint, the insulating layer with the accommodation space passes through first arch and first recess joint, still be provided with the cooling tube in the accommodation space.

2. A fire-resistant and fire-retardant cable according to claim 1, wherein said wrapping tape layer is a ceramic silicone rubber fire-resistant composite tape layer.

3. The fireproof flame-retardant cable according to claim 1, wherein the accommodating space is filled with a filling material.

4. A fire-resistant and fire-retardant cable according to claim 3, wherein said filler material is alkali-free glass fiber.

5. The fireproof flame-retardant cable according to claim 1, wherein the extruded ceramic thermal insulation layer is a ceramic silicone rubber material layer.

6. A fire resistant and flame retardant cable as claimed in claim 1, wherein said fire resistant metallized layer is a double layer steel tape layer.

7. The fire-resistant and flame-retardant cable of claim 1, further comprising a high oxygen index oxygen barrier layer covering the outer surface of the wrapping tape layer, wherein the outer surface of the high oxygen index oxygen barrier layer is covered with the fire-resistant metal forming layer.

8. A fire-retardant cable according to claim 7, wherein said high oxygen index oxygen barrier layer is a ceramic silicone rubber composite tape layer.

9. A fireproof flame-retardant cable according to any one of claims 1 to 8, wherein the outer sheath layer is a ceramic halogen-free low-smoke polyolefin flame-retardant fire-retardant sheath layer.

10. A fire-resistant and fire-retardant cable according to claim 1, wherein said heat dissipating pipe is two.

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