CN213339724U - Copper core inorganic insulation polypropylene outer sheath flexible fireproof cable - Google Patents

Abstract

The utility model discloses a flexible fireproof cable with a copper core, an inorganic insulation polypropylene outer sheath, which comprises a cable core, wherein the cable core is formed by stranding a plurality of fireproof inorganic insulation wire cores; the cable comprises a cable core, a PP tearing netted filling rope is filled in a gap of the cable core, a CPP wrapping tape is wrapped outside the cable core, a polyurethane inner jacket is extruded outside the CPP wrapping tape, a ceramic fireproof and fireproof composite tape is wrapped outside the polyurethane inner jacket, a metal shielding layer is woven outside the ceramic fireproof and fireproof composite tape, a halogen-free low-smoke high-flame-retardant oxygen-insulating and fire-insulating glass cloth wrapping tape is wrapped outside the metal shielding layer, a thin-film glass fiber reinforced aurum mica tape is wrapped outside the metal shielding layer, and a polypropylene outer jacket is extruded outside the thin-film glass fiber reinforced aurum mica tape. The utility model discloses have acid and alkali-resistance, intensity height, longe-lived, harmless tasteless, the temperature toleration is good, and chemical stability is good, and the water absorption rate is low, and toughness is good, tensile properties performance such as good.

Description

Copper core inorganic insulation polypropylene outer sheath flexible fireproof cable

Technical Field

The utility model relates to a wire and cable field, concretely relates to flexible fireproof cable of inorganic insulating polypropylene ethylene oversheath of copper core.

Background

A fire refers to a disaster caused by uncontrolled combustion in time and space. Among the various disasters, fire is one of the main disasters that threaten public safety and social development most often and most generally.

With the continuous development of society, the social wealth is increasing, meanwhile, the danger of fire disasters is also increasing, the hazard of the fire disasters is also increasing, and oxygen deficiency, high temperature, smoke dust and toxic gas in the fire disasters are main reasons for harming human bodies.

With the needs of urban power grid and engineering construction, a higher-level construction standard is adopted, and a specially matched high-voltage connection protection box, a grounding cable, a coaxial cable and the like are objectively needed in the construction process of the 110 kV-220 kV crosslinked cable. Because the high-voltage power supply system is the power supply 'aorta', the outer sheath of the high-voltage cable can be heated due to overlarge induced potential of the connection system in the use process, the aging is accelerated, and the safety of people or other animals is endangered, meanwhile, if the induced potential is overlarge for a long time, the cable can catch fire and spread to cause a serious loop to be easily affected by the outside and fire, the cable is subjected to partial discharge and puncture in a cable intensive place and a humid environment, and the like, and the cable is subjected to effective separation or isolation by setting proper or selecting facilities with flame retardant, fire resistant and fire resistant requirements, and the like, so that the problems are easily caused: 1) the resource facility wastes a lot and has high cost; 2) the construction conditions are increased, and the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the flexible fireproof cable with the copper core inorganic insulation polypropylene ethylene outer sheath has the advantages of acid and alkali resistance, high strength, long service life, harmlessness, no odor, good temperature resistance, good chemical stability, low water absorption, good toughness, good stretchability and the like.

In order to achieve the purpose, the utility model provides a flexible fireproof cable with a copper core, an inorganic insulation polypropylene outer sheath, which comprises a cable core, wherein the cable core is formed by twisting a plurality of fireproof inorganic insulation wire cores; the method comprises the steps of filling PP tearing netted filling ropes in gaps of a cable core, wrapping a CPP wrapping tape with the thickness of 0.06-0.12mm and the width of 15-100mm outside the cable core, extruding a polyurethane inner sheath outside the CPP wrapping tape, wrapping a ceramic fireproof fire-resistant composite tape with the thickness of 0.2-0.8mm and the width of 25-80mm outside the polyurethane inner sheath, weaving a metal shielding layer outside the ceramic fireproof fire-resistant composite tape, wrapping a halogen-free low-smoke high-flame-retardant oxygen-insulating fire-insulating glass cloth wrapping tape outside the metal shielding layer, then wrapping a thin-film glass fiber reinforced aurum mica tape, and extruding a polypropylene outer sheath outside the thin-film glass fiber reinforced aurum mica tape.

Preferably, the fireproof inorganic insulating wire core is composed of a copper conductor, an inorganic mineral insulating layer extruded outside the copper conductor, a mica heat-insulating fireproof belt extruded outside the inorganic mineral insulating layer and a halogen-free low-smoke flame-retardant polyolefin oxygen-insulating sheath extruded outside the mica heat-insulating fireproof belt, and the flame-retardant system has excellent flame retardance, high oxygen index, heat insulation and oxygen isolation, no emission of halogen acid gas during combustion, very little release of toxic and corrosive gas, extremely low smoke concentration of the product and good flame-retardant effect.

Preferably, the mica heat-insulating fireproof belt comprises a mica paper substrate, wherein a silicon micropowder layer is sequentially formed on one side surface of the mica paper substrate, a graphene film is formed on the outer surface of the silicon micropowder layer, an epoxy resin layer is coated on the surface of the graphene film, an alkali-free glass fiber cloth is formed on the other side surface of the mica paper substrate in an adhesion mode through an organic silicon adhesive layer, a polytetrafluoroethylene layer is coated on the outer surface of the alkali-free glass fiber cloth, the mica heat-insulating fireproof belt can be used as a cable coating material, has good bending resistance and physical strength and high fireproof and waterproof grades, can still maintain the complete function even if a protective layer of the outer layer of the cable is stripped and damaged, and has small influence on the loss and transmission performance of a cable core. .

Preferably, the ceramic fireproof and fire-resistant composite belt is formed by compounding ceramic fireproof and fire-resistant silicone rubber and high-temperature-resistant glass fiber cloth serving as base materials in a stretching and pressing mode, and becomes hard to form a ceramic shell at the temperature of more than 350 ℃, the ceramic hard shell can play a good role in inflaming retarding, fire resistance, fire prevention and fire isolation under the condition of fire, the maximum temperature can reach 3000 ℃, the smoothness of a circuit is effectively guaranteed, and the ceramic fireproof and fire-resistant composite belt is mainly used for replacing a mica belt to be used as a fireproof and fire-resistant layer of a wire and a cable and can also be used as an insulating layer; the ceramic shell can be formed under the condition of flame or no flame at 350-3000 ℃, has excellent fireproof performance, density of 1.45-1.50 and 25 percent lower than that of mica tape, is waterproof, does not absorb moisture, has high strength, excellent mechanical performance and excellent electrical insulation performance.

Preferably, the metal shielding layer is a net structure woven by transverse copper wires and longitudinal zinc-aluminum alloy wires.

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

1. the PP tearing reticular filling rope is filled, so that the cable is round, the round degree of the cable is improved, the flexibility is excellent, the weight is light, the strength of the non-hygroscopic material is not influenced by moisture, the tensile strength is high, the acid-base resistance and the mildew resistance are good, the high-frequency insulating property is good, the voltage resistance is high, and the non-toxic and environment-friendly effects are achieved;

2. the halogen-free low-smoke flame-retardant polyolefin oxygen-insulating sheath has excellent flame retardance, high oxygen index, heat insulation and oxygen insulation, no halogen gas is released during combustion, the release amount of toxic and corrosive gases is very small, the smoke concentration of the product is extremely low, and the flame-retardant effect is good;

3. the cable core is provided with the inorganic mineral insulating layer which is composed of inorganic matters, so that the cable core cannot cause fire, cannot burn or support combustion, cannot generate toxic gas, and can still normally work even if flame burns outside. The continuous working temperature of the mineral cable is 250 ℃, the power can be continuously supplied for 3 hours at 950-1000 ℃, and the mineral cable can work at 1083 ℃ close to the melting point of copper in a short time or in an abnormal time;

4. the fireproof and fire-resistant wire and cable produced by the product has the fire-resistant grade reaching the A-grade standard of GB12666.6 (burning for 90 minutes in flame at 950-1000 ℃ and 3A fuse not fusing), and can pass the CWZ highest-grade test of British BS6387 (C- - -burning in flame at 950 ℃ for 3 hours; W- - -water spraying; Z- - -vibration);

5. the smoke after combustion is low-smoke, halogen-free, phosphorus-nitrogen-free, heavy-metal-free, nontoxic and harmless, the smoke toxicity safety level reaches the highest safety level ZA1 level of a high polymer material, secondary damage to people is avoided, the smoke is environment-friendly and easy to recover, and the smoke has the performances of acid and alkali resistance, high strength, long service life, harmlessness, insipidity, good temperature resistance, good chemical stability, low water absorption, good toughness, good stretchability and the like.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of a mica thermal insulation fireproof belt.

Detailed Description

The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.

As shown in fig. 1, the utility model provides a flexible fireproof cable with a copper core, an inorganic insulation polypropylene outer sheath, which comprises a cable core, wherein the cable core is formed by twisting a plurality of fireproof inorganic insulation wire cores; the fireproof inorganic insulating wire core is composed of a copper conductor 1, an inorganic mineral insulating layer 2 extruded outside the copper conductor, a mica heat-insulating fireproof belt 3 extruded outside the inorganic mineral insulating layer and a halogen-free low-smoke flame-retardant polyolefin oxygen-insulating sheath 4 extruded outside the mica heat-insulating fireproof belt, and a flame-retardant system has excellent flame retardance, high oxygen index, heat insulation and oxygen insulation, no halogen acid gas is discharged during combustion, the release amount of toxic and corrosive gas is very small, the smoke concentration of a product is very low, and the flame-retardant effect is good; the PP tearing reticular filling rope 5 is filled in the gap of the cable core, so that the cable is round, the round degree of the cable is improved, the flexibility is excellent, the weight is light, the cable is made of non-hygroscopic materials, the strength is not influenced by moisture, the tensile strength is high, the acid-base resistance and the mildew resistance are excellent, the high-frequency insulation performance is good, the voltage resistance is high, and the cable is non-toxic and environment-friendly; the CPP wrapping tape 6 with the thickness of 0.06-0.12mm and the width of 15-100mm is wrapped outside the cable core, the using temperature range is large, the thermal shrinkage rate at high temperature is small, the isolation performance is good, the tape is thin, the winding is tight, and the cable diameter is reduced, so that the outer sheath material is saved, and the cable cost is greatly reduced; the CPP wrapping tape is externally extruded with the polyurethane inner sheath 7, so that the CPP wrapping tape has the advantages of high-efficiency heat preservation, water resistance, corrosion resistance, heat insulation, sound insulation, flame retardance, cold resistance, corrosion resistance, light capacity and high strength; the ceramic fireproof and fire-resistant composite belt 8 with the thickness of 0.2-0.8mm and the width of 25-80mm is wound outside the polyurethane inner sheath, is formed by compounding ceramic fireproof and fire-resistant silicone rubber and high-temperature-resistant glass fiber cloth serving as base materials in a stretching and pressing mode, and becomes hard to form a ceramic shell at the temperature of more than 350 ℃, so that the ceramic hard shell can play good effects of inflaming retarding, fire resistance, fire prevention and fire insulation under the fire condition, the maximum temperature can reach 3000 ℃, the smoothness of a circuit is effectively guaranteed, and the ceramic fireproof and fire-resistant composite belt is mainly used for replacing a mica belt to serve as a fireproof layer of a wire and a cable and can also serve as an insulating layer; the ceramic shell can be formed under the condition of flame or no flame at 350-3000 ℃, has excellent fireproof performance, density of 1.45-1.50 and 25 percent lower than that of mica tape, is waterproof, does not absorb moisture, has high strength, excellent mechanical performance and excellent electrical insulation performance; the metal shielding layer 9 is woven outside the ceramic fireproof fire-resistant composite belt, a transverse copper wire with the diameter of 0.8mm and a longitudinal zinc-aluminum alloy wire with the diameter of 0.8mm are woven into a net structure, the structure of the cable is firmer in the transverse direction and the radial direction, the zinc-aluminum alloy wire has good wear resistance and corrosion resistance, and the shielding property of the cable is better due to the combination of the copper wire with the zinc-aluminum alloy wire; the halogen-free low-smoke high-flame-retardant oxygen-and-fire-insulating glass cloth wrapping tape 10 is wrapped outside the metal shielding layer, the fire-insulating layer is decomposed into metal oxides and separates out crystal water when encountering fire, the metal oxides are decomposed to form a net structure and have a certain adsorption effect on smoke, the separated out crystal water not only has an obvious sedimentation effect on smoke particles, but also has a better heat absorption effect, in addition, a carbonization structure can be formed in the combustion process, the carbonization layer plays a great role in low smoke and flame retardance of the cable, the heat absorption effect delays the combustion speed and the sharp rise time when the cable starts to combust, due to the formation of the carbonization structure, the supply of oxygen and the flow of combustible gas are blocked, the combustion of the cable is resisted, the film glass fiber reinforced gold mica tape 11 is wrapped, and the cable can keep a circuit and normally operate for 90 minutes when the flame temperature is up to 950 ℃, the outer sheath 12 of the polypropylene is extruded outside the thin film glass fiber reinforced auro mica tape, so that the paint is firm, durable, high in acid and alkali resistance, high in strength, long in service life, harmless, odorless, good in temperature resistance, good in chemical stability, low in water absorption rate, good in toughness and good in stretchability.

As shown in fig. 2, the mica thermal insulation fireproof belt comprises a mica paper substrate 13, wherein a silica micropowder layer 14 is sequentially formed on one surface of the mica paper substrate, a graphene film 15 is formed on the outer surface of the silica micropowder layer, an epoxy resin layer 16 is coated on the surface of the graphene film, an alkali-free glass fiber cloth 18 is formed on the other surface of the mica paper substrate in an adhesion manner through an organic silicon adhesive layer 17, and a polytetrafluoroethylene layer 19 is coated on the outer surface of the alkali-free glass fiber cloth; the mica heat-insulation fireproof tape can be used as a cable coating material, has better bending resistance and physical strength, and also has higher fireproof and waterproof grades, so that the complete function of the mica heat-insulation fireproof tape can be maintained even if a protective layer on the outer layer of the cable is stripped and damaged, and meanwhile, the mica heat-insulation fireproof tape has less influence on the loss and the transmission performance of a wire core.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the principle of the present invention, and these should also be considered as belonging to the protection scope of the present invention.

Claims (5)

1. The utility model provides a flexible fireproof cable of inorganic insulating polypropylene outward jacket of copper core, includes the cable core, its characterized in that: the cable core is formed by stranding a plurality of fire-resistant inorganic insulating wire cores; the method comprises the steps of filling PP tearing netted filling ropes in gaps of a cable core, wrapping a CPP wrapping tape with the thickness of 0.06-0.12mm and the width of 15-100mm outside the cable core, extruding a polyurethane inner sheath outside the CPP wrapping tape, wrapping a ceramic fireproof fire-resistant composite tape with the thickness of 0.2-0.8mm and the width of 25-80mm outside the polyurethane inner sheath, weaving a metal shielding layer outside the ceramic fireproof fire-resistant composite tape, wrapping a halogen-free low-smoke high-flame-retardant oxygen-insulating fire-insulating glass cloth wrapping tape outside the metal shielding layer, then wrapping a thin-film glass fiber reinforced aurum mica tape, and extruding a polypropylene outer sheath outside the thin-film glass fiber reinforced aurum mica tape.

2. The copper-core inorganic insulating polypropylene outer sheath flexible fireproof cable of claim 1, wherein: the fireproof inorganic insulation wire core is composed of a copper conductor, an inorganic mineral insulation layer extruded outside the copper conductor, a mica heat insulation fireproof belt extruded outside the inorganic mineral insulation layer, and a halogen-free low-smoke flame-retardant polyolefin oxygen insulation sheath extruded outside the mica heat insulation fireproof belt.

3. The copper-core inorganic insulating polypropylene outer sheath flexible fireproof cable of claim 2, wherein: the mica heat-insulation fireproof belt comprises a mica paper substrate, wherein a silicon micropowder layer is sequentially formed on the surface of one side of the mica paper substrate, a graphene film is formed on the outer surface of the silicon micropowder layer, an epoxy resin layer is coated on the surface of the graphene film, an alkali-free glass fiber cloth is formed on the surface of the other side of the mica paper substrate in an adhesion mode through an organic silicon adhesive layer, and a polytetrafluoroethylene layer is coated on the outer surface of the alkali-free glass fiber cloth.

4. The copper-core inorganic insulating polypropylene outer sheath flexible fireproof cable of claim 1, wherein: the ceramic fireproof and fireproof composite belt is formed by compounding ceramic fireproof and fireproof silicon rubber and high-temperature-resistant glass fiber cloth serving as base materials in a stretching and pressing mode.

5. The copper-core inorganic insulating polypropylene outer sheath flexible fireproof cable of claim 1, wherein: the metal shielding layer is in a net structure woven by transverse copper wires and longitudinal zinc-aluminum alloy wires.

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