CN111063484A - Flexible moisture-proof non-combustible cable and manufacturing method thereof - Google Patents

Flexible moisture-proof non-combustible cable and manufacturing method thereof Download PDF

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Publication number
CN111063484A
CN111063484A CN201911304915.0A CN201911304915A CN111063484A CN 111063484 A CN111063484 A CN 111063484A CN 201911304915 A CN201911304915 A CN 201911304915A CN 111063484 A CN111063484 A CN 111063484A
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silica gel
inorganic mineral
wire core
cable
fire
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田鸣
蒋仁章
惠俊恒
周珊
石志磊
缪鹏生
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Anhui Pacific Cable Co ltd
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Anhui Pacific Cable Co ltd
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Priority to CN201911304915.0A priority Critical patent/CN111063484A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1875—Multi-layer sheaths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/20—Metal tubes, e.g. lead sheaths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame

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  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)

Abstract

The flexible moisture-proof non-combustible cable comprises an insulated wire core, a wire core inorganic mineral insulated belt and a ceramic fireproof fire-resistant silica gel mud moisture-proof layer, wherein the insulated wire core consists of a wire core conductor, a wire core inorganic mineral insulated belt and a ceramic fireproof fire-resistant silica gel mud moisture-proof layer, the wire core inorganic mineral insulated belt is wrapped outside the wire core conductor, and the ceramic fireproof fire-resistant silica gel mud moisture-; the cable is characterized in that water-releasing and cooling inorganic compound filling is extruded and wrapped after insulated wire cores are stranded into a cable, a cable inorganic mineral insulating belt is arranged outside the water-releasing and cooling inorganic compound filling, a ceramic fireproof and fire-resistant silica gel mud isolating layer is arranged outside the cable inorganic mineral insulating belt, a metal corrugated sheath is arranged outside the ceramic fireproof and fire-resistant silica gel mud isolating layer, and non-metal materials such as an insulating layer, a moisture-proof layer, a filling layer and an isolating layer are inorganic mineral fireproof materials.

Description

Flexible moisture-proof non-combustible cable and manufacturing method thereof
Technical Field
The invention relates to the technical field of cables, in particular to a flexible moisture-proof non-combustible cable and a manufacturing method thereof.
Background
With the high development of economy and personal rights in China, fire safety is more and more emphasized by all social levels, and fire cables gradually become an important development direction of the safe electric energy transmission technology in China, and are counted according to data: in recent years, more than 60% of fires caused by various electrics in China are caused by electric lines (wires and cables), and immeasurable loss is brought to personal safety and property; it follows that safety fire protection cables have become a major concern in safety fire protection operations.
At present, most of cables commonly used in domestic fire-fighting places are halogen-free low-smoke flame-retardant fire-resistant cables, the cables have certain flame spread prevention capability in fire, the smoke release amount in the combustion process meets the requirement of 60% light transmittance, and normal electrification within a specified time can be kept, but the cables are insufficient, and the influence of the cables on the surrounding environment in the fire, such as the heat release amount, combustion drops and the like, is not fully considered.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a flexible moisture-proof non-combustible cable and a manufacturing method thereof.
A flexible moisture-proof non-combustible cable comprises an insulated wire core, wherein the insulated wire core consists of a wire core conductor, a wire core inorganic mineral insulating tape wrapped outside the wire core conductor and a ceramic fireproof fire-resistant silica gel mud moisture-proof layer arranged outside the wire core inorganic mineral insulating tape; the insulating wire cores are stranded into a cable and then extruded and wrapped with water-releasing and temperature-reducing inorganic compound for filling, a cable inorganic mineral insulating belt is arranged outside the water-releasing and temperature-reducing inorganic compound for filling, a ceramic fireproof and fire-resistant silica gel mud isolating layer is arranged outside the cable inorganic mineral insulating belt, and a metal corrugated sheath is arranged outside the ceramic fireproof and fire-resistant silica gel mud isolating layer.
Preferably, a liquid silicone rubber coating is further arranged outside the ceramic fireproof fire-resistant silica gel mud moisture-proof layer of the insulating wire core.
Preferably, the core conductor is an oxygen-free copper conductor and is formed by drawing, annealing and stranding a plurality of copper wires; the wire core inorganic mineral insulating tape is a halogen-free inorganic mineral insulating tape.
Preferably, the volume resistivity of the halogen-free inorganic mineral insulating tape at ambient temperature is not less than 5 multiplied by 1012 omega-m, and the halogen-free inorganic mineral insulating tape does not break down at the high temperature of 1000 ℃ for 90 min; the ceramic fireproof silica gel mud moisture-proof layer has the volume resistivity of more than or equal to 5 multiplied by 1013 omega.m, the breakdown strength of more than or equal to 20kV/mm and the high temperature resistance of 2000 ℃.
Preferably, the water-releasing and temperature-reducing inorganic compound is filled with a metal inorganic compound comprising aluminum hydroxide AL (OH)3 and/or magnesium hydroxide Mg (OH)2 with water-releasing and temperature-reducing characteristics.
Preferably, the water-releasing and temperature-reducing inorganic compound filling comprises sodium silicate, aluminum hydroxide, magnesium hydroxide and a cementing agent, wherein the ratio of the aluminum hydroxide to the magnesium hydroxide is 2:1, and the temperature for water-releasing and temperature-reducing of the aluminum hydroxide is lower than the temperature for water-releasing and temperature-reducing of the magnesium hydroxide.
Preferably, the sodium silicate has a cementitious effect in air CO2Can separate out a new ecological SiO under the action2Colloid, chemical equation as follows:
NaO·mSiO2+CO2+nH2O＝NaCO3+mSiO2·nH2O；
after adding aluminium hydroxide, magnesium hydroxide and cementing agentPrecipitated colloidal SiO with great activity2Adhering the aluminum hydroxide particles and the magnesium hydroxide particles to the surfaces of the aluminum hydroxide particles and the magnesium hydroxide particles to bond the aluminum hydroxide particles and the magnesium hydroxide particles together; the colloid SiO continuously absorbs water from the aluminum hydroxide and the magnesium hydroxide particles2The water content is continuously reduced, and the aluminum hydroxide and the magnesium hydroxide are tightly cemented on the surfaces of the particles to form a three-dimensional network structure.
Preferably, the material of the cabling inorganic mineral insulating belt and the ceramic fireproof and fireproof silica gel mud isolating layer is the same as the material of the cable core inorganic mineral insulating belt and the ceramic fireproof and fireproof silica gel mud damp-proof layer respectively, and the metal corrugated sheath is formed by rolling after copper metal belts are welded without seams.
The invention also provides a manufacturing method of the flexible moisture-proof non-combustible cable, which comprises the following steps:
step 1: and drawing, annealing and twisting a plurality of copper wires to form the wire core conductor 11.
Step 2: and a halogen-free inorganic mineral insulating tape is wrapped around the wire core inorganic mineral insulating tape outside the wire core conductor.
And step 3: and a ceramic fireproof and fire-resistant silica gel mud damp-proof layer is extruded outside the inorganic mineral insulating belt of the wire core by ceramic fireproof and fire-resistant silica gel mud to form the insulating wire core.
And 4, step 4: after the single or multiple insulated wire cores are twisted into a cable, the cable is extruded to release water and cool the inorganic compound for filling.
And 5: and winding a cable-forming inorganic mineral insulating tape by adopting a halogen-free inorganic mineral insulating tape outside the water-releasing and temperature-reducing inorganic compound filling.
Step 6: and a ceramic fireproof and fire-resistant silica gel mud isolating layer is extruded outside the cabling inorganic mineral insulating belt.
And 7: and a metal corrugated sheath is welded and rolled in a seamless manner by adopting a copper metal belt outside the ceramic fireproof fire-resistant silica gel mud isolation layer.
Preferably, the step 3 further comprises spraying liquid silicone rubber outside the ceramic fireproof fire-resistant silica gel mud moisture-proof layer, and then carrying out heat drying and curing to form a liquid silicone rubber coating.
The flexible moisture-proof non-combustible cable provided by the invention has the advantages that non-metallic materials such as the insulating layer, the moisture-proof layer, the filling layer and the isolating layer are inorganic mineral fireproof materials, the flexible moisture-proof non-combustible cable has the characteristics of non-combustion, no smoke, no toxicity and no drop, the cable cannot burn in a fire disaster, no smoke and toxic gas are released, no drop exists, the normal electrification can be kept, the cable can bear water spray and heavy object impact in the fire disaster, the flexibility of the cable is ensured by adopting the corrugated metal sheath, and the flexible moisture-proof non-combustible cable has the capability of blocking flame and external mechanical.
In addition, still be equipped with liquid silicon rubber coating outside the pottery fire prevention fire-resistant silica gel mud dampproof course of insulation core, increase insulation core's wear-resisting and anti-adhesion performance through liquid silicon rubber coating to improve the sliding capacity between the sinle silk, increase the flexibility of cable, make the cable wholly change in buckle and resume easily, the life of extension cable.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
FIG. 2 is a schematic view of the space chemistry formed by the present invention;
FIG. 3 is a chain structure diagram formed by the sodium silicate of the invention;
FIG. 4 is a series of similar three-dimensional mesh frameworks according to the present invention.
In the figure: 1-an insulated wire core, 11-a wire core conductor, 12-a wire core inorganic mineral insulating tape, 13-a ceramic fireproof fire-resistant silica gel mud damp-proof layer, 2-water release and cooling inorganic compound filling, 3-a cabling inorganic mineral insulating tape, 4-a ceramic fireproof fire-resistant silica gel mud isolating layer and 5-a metal corrugated sheath.
Detailed Description
The following examples are given in conjunction with the accompanying drawings to further illustrate the specific embodiments of the flexible moisture-proof non-combustible cable of the present invention. The flexible moisture-proof non-combustible cable of the present invention is not limited to the description of the following embodiments.
A flexible moisture-proof non-combustible cable comprises an insulated wire core 1, wherein the insulated wire core 1 consists of a wire core conductor 11, a wire core inorganic mineral insulating tape 12 wrapped outside the wire core conductor 11 and a ceramic fireproof fire-resistant silica gel mud moisture-proof layer 13 arranged outside the wire core inorganic mineral insulating tape 12; after the insulated wire cores 1 are stranded into a cable, the cable is extruded with a water release and temperature reduction inorganic compound filling 2, a cable forming inorganic mineral insulating tape 3 is arranged outside the water release and temperature reduction inorganic compound filling 2, a ceramic fireproof and fireproof silica gel mud isolating layer 4 is arranged outside the cable forming inorganic mineral insulating tape 3, and a metal corrugated sheath 5 is arranged outside the ceramic fireproof and fireproof silica gel mud isolating layer 4.
The flexible moisture-proof non-combustible cable provided by the invention has the advantages that non-metallic materials such as the insulating layer, the moisture-proof layer, the filling layer and the isolating layer are inorganic mineral fireproof materials, the flexible moisture-proof non-combustible cable has the characteristics of non-combustion, no smoke, no toxicity and no drop, the cable cannot burn in a fire disaster, no smoke and toxic gas are released, no drop exists, the normal electrification can be kept, the cable can bear water spray and heavy object impact in the fire disaster, the flexibility of the cable is ensured by adopting the corrugated metal sheath, and the flexible moisture-proof non-combustible cable has the capability of blocking flame and external mechanical.
Preferably, still be equipped with liquid silicon rubber coating outside insulating sinle silk 1's ceramic fire prevention fire-resistant silica gel mud dampproof course 13, increase insulating sinle silk 1's wear-resisting and anti-adhesion performance through liquid silicon rubber coating to improve the sliding ability between the sinle silk, increase the flexibility of cable, make the cable wholly change in buckle and resume easily, the life of extension cable.
As shown in fig. 1, in a first embodiment, a flexible moisture-proof non-combustible cable comprises an insulated wire core 1, wherein the insulated wire core 1 consists of a wire core conductor 11, a wire core inorganic mineral insulating tape 12 wrapped outside the wire core conductor 11, and a ceramic fireproof fire-resistant silica gel mud moisture-proof layer 13 extruded outside the wire core inorganic mineral insulating tape 12; insulating cable cores 1 are stranded into a cable, water releasing and cooling inorganic compound filling 2 is extruded outside the cable, the water releasing and cooling inorganic compound filling 2 is positioned between the insulating cable cores 1, the water releasing and cooling inorganic compound filling 2 is wound outside the cable to form a cable inorganic mineral insulating tape 3, the cable inorganic mineral insulating tape 3 is extruded outside the ceramic fireproof and fireproof silica gel mud isolating layer 4, and metal corrugated sheaths 5 such as rolled copper and the like are welded outside the ceramic fireproof and fireproof silica gel mud isolating layer 4 in a seamless mode.
Preferably, the core conductor 11 is a copper conductor, preferably high-purity oxygen-free copper, and the core conductor 11 is formed by drawing, annealing and stranding a plurality of copper wires. The core inorganic mineral insulating tape 12 is a halogen-free inorganic mineral insulating tape, preferably a halogen-free inorganic mineral insulating tape with a decomposition temperature of 1000 ℃, and the volume resistivity of the halogen-free inorganic mineral insulating tape at an ambient temperature is not less than 5 x 1012 omega-m, so that the cable core inorganic mineral insulating tape does not break down at a high temperature of 1000 ℃ for 90 min.
And a ceramic fireproof silica gel mud moisture-proof layer 13 is extruded outside the core inorganic mineral insulating tape 12 to serve as a moisture-proof composite insulator. The ceramic fireproof fire-resistant silica gel mud moisture-proof layer 13 is ceramic fireproof fire-resistant silica gel which is commercially available, is mineral insulation flexible silica gel mud, is an inorganic composite mineral oxide oxygen-isolating filling material, is non-burning, smokeless, free of harmful gas generation, free of moisture absorption and water absorption, has the volume resistivity of more than or equal to 5 multiplied by 1013 omega.m, the breakdown strength of more than or equal to 20kV/mm, can resist high temperature of 2000 ℃, has excellent insulating and fireproof performances, and a hard ceramic armored shell can bear spraying and vibration.
The core conductor 11, the core inorganic mineral insulating tape 12 and the ceramic fireproof and fireproof silica gel mud damp-proof layer 13 which are arranged in sequence form the insulated core 1 of the cable, a single or a plurality of insulated cores 1 are twisted into a cable, and the cable core is externally extruded with a water releasing and cooling inorganic compound filling 2 to be used as a fire-insulating and cooling layer. Preferably, the water-releasing temperature-reducing inorganic compound filling 2 of the present invention is a metal inorganic compound including aluminum hydroxide al (oh)3 and/or magnesium hydroxide mg (oh)2 having water-releasing temperature-reducing characteristics. The inorganic compound filling 2 for reducing temperature by instantly releasing water is an aluminum hydroxide inorganic compound layer, or a magnesium hydroxide inorganic compound layer, or an aluminum hydroxide and magnesium hydroxide inorganic compound layer.
As a preferred embodiment, the water-releasing and temperature-reducing inorganic compound filling 2 further comprises sodium silicate, which is mainly prepared by matching sodium silicate, aluminum hydroxide AL (OH)3, magnesium hydroxide Mg (OH)2, cementing agent and the like, releases crystal water to reduce the temperature of the insulated cable core 1 after the temperature rises in fire, and is sintered into solid aluminum oxide AL through chemical reaction2O3And the magnesium oxide MgO can effectively play a role in heat insulation and fire prevention. Particularly, the invention adds metal compounds of aluminum hydroxide and magnesium hydroxide with water-releasing and temperature-reducing characteristics simultaneously, wherein the ratio of aluminum hydroxide AL (OH)3 to magnesium hydroxide Mg (OH)2 is 2:1, the temperature for water-releasing and temperature-reducing of the aluminum hydroxide is lower than that of the water-releasing and temperature-reducing of the magnesium hydroxide, and the aluminum hydroxide can be heated in the temperature range ofThe temperature is reduced by decomposing and releasing water at 150-250 ℃ (heat absorption is 1.96MJ/kg), the magnesium hydroxide can decompose and release water at 300-400 ℃ to reduce the temperature, the stepped water release temperature of the cable under different high temperature conditions is realized, and the temperature reduction of the cable and the cable can be realized simultaneously and in a stepped manner through proportion and temperature difference.
Wherein the sodium silicate has a cementing effect in air CO2Under the action of the solution, a new ecological SiO can be separated out2Colloid, chemical equation as follows:
NaO·mSiO2+CO2+nH2O＝NaCO3+mSiO2·nH2O；
after adding aluminium hydroxide, magnesium hydroxide and cementing agent, the precipitated colloid SiO with great activity2Adhering the aluminum hydroxide particles and the magnesium hydroxide particles to the surfaces of the aluminum hydroxide particles and the magnesium hydroxide particles to bond the aluminum hydroxide particles and the magnesium hydroxide particles together; the colloid SiO continuously absorbs water from the aluminum hydroxide and the magnesium hydroxide particles2The water content is continuously reduced, and the aluminum hydroxide and the magnesium hydroxide are tightly cemented on the surfaces of the particles to form a three-dimensional network structure.
The chemical structure of the metal inorganic compound was analyzed from the viewpoint of molecular structure as follows: the spatial stereochemistry of sodium silicate solution is determined by Si-O covalent bond, and Si atom is located in SiO which is the basic unit mechanism of regular tetrahedron4 4-The basic structural units can be combined into anions with chain, ring, layer and cubic grid structures (shown in figure 2) in different modes, the anions are connected together by sodium metal ions to form the chain structures (shown in figure 3), and SiO4 4-The regular tetrahedrons form anions of different siloxy groups by sharing different numbers of oxygen atoms, e.g. SiO4 4-、Si2O7 2-、Si3O6 6-、Si6O18 12-And the molecules are changed into three-dimensional structures from linear and planar after the aluminum hydroxide, the magnesium hydroxide and the cementing agent are added, and the formed molecular structure is similar to the three-dimensional network structure of the figure 4. The structure layer can gradually release free water molecules in the structure layer at high temperature, and steam in the release process of the free water moleculesThe temperature is reduced, the temperature rise in the cable is delayed, and when free water molecules are evaporated, the layer structure becomes a porous net structure. When the internal temperature of the cable rises to above 150 ℃, aluminum hydroxide AL (OH)3 starts to perform chemical reaction, the chemical reaction of the aluminum hydroxide is delayed due to the heat preservation and heat insulation effects of the porous reticular structure, the evaporation of crystal water molecules is delayed, the chemical reaction of the magnesium hydroxide is also delayed, when the internal temperature of the cable rises to 250 ℃ and 300 ℃, the aluminum hydroxide and the magnesium hydroxide perform the chemical reaction simultaneously, the ratio of the aluminum hydroxide to the magnesium hydroxide is 2:1, the aluminum hydroxide and the magnesium hydroxide can react simultaneously to release water and cool, the chemical reaction of the aluminum hydroxide and the magnesium hydroxide is delayed while the internal temperature rise of the cable is reduced, the heat preservation and heat insulation effects of the porous reticular structure are simultaneously delayed, the evaporation of crystal water molecules is finally formed, and the heat insulation and fire insulation material with the porous reticular framework structure is further formed, so that a fire source is isolated, and the temperature.
The exterior of the water release cooling inorganic compound filling 2 is sequentially provided with a cabling inorganic mineral insulating tape 3, a ceramic fireproof fire-resistant silica gel mud isolating layer 4 and a metal ripple sheath 5, so as to isolate water and fire from the insulating wire core 1. The material of the cabling inorganic mineral insulating tape 3 and the ceramic fireproof fire-resistant silica gel mud isolating layer 4 is the same as that of the cable core inorganic mineral insulating tape 12 and the ceramic fireproof fire-resistant silica gel mud damp-proof layer 13 respectively. The corrugated metal sheath 5 can be formed by embossing after seamless welding of metal strips such as copper and the like, seamless welding ensures that a cable core inside the cable is isolated from the outside, and the corrugated metal sheath has waterproof and moistureproof characteristics, ensures the flexibility of the cable and has the capability of blocking flame and external mechanical impact.
The flexible moisture-proof non-combustible cable disclosed by the invention has the advantages that non-metallic materials such as the insulating material, the moisture-proof layer, the filling material and the isolating layer are inorganic mineral fireproof materials, the flexible moisture-proof non-combustible cable has the characteristics of non-combustion, no smoke, no toxicity and no dropping, the cable cannot burn in a fire disaster, no smoke and toxic gas are released, no dropping is generated, the normal electrification can be kept, the water spray and the heavy object impact in the fire disaster can be borne, the requirements of A-level non-combustible grade in GB31247-2014 Cable and optical cable combustible grade are met, and meanwhile, the problems of poor moisture resistance and poor flexibility of the cable are solved. The device is particularly suitable for high-rise buildings with rated voltage of 3kV or below, airports, subways, stations, hospitals and other places with higher requirements on the safety fire-fighting level.
The processing steps of the flexible moisture-proof non-combustible cable are further described in the following with reference to the embodiment shown in fig. 1.
Step 1: and a copper conductor stranding process is adopted, and a plurality of copper wires are subjected to wire drawing, annealing and stranding to form the wire core conductor 11.
Step 2: and a halogen-free inorganic mineral insulating tape is adopted outside the wire core conductor 11 to wrap the wire core inorganic mineral insulating tape 12.
And step 3: and a ceramic fireproof and fire-resistant silica gel mud moisture-proof layer 13 is extruded outside the inorganic mineral insulating tape 12 of the wire core by ceramic fireproof and fire-resistant silica gel mud to form the insulating wire core 1.
And 4, step 4: after the single or a plurality of insulated wire cores 1 are twisted into a cable, the extruded water releasing and cooling inorganic compound filling 2 is extruded.
And 5: and a halogen-free inorganic mineral insulating tape is wrapped around the water-releasing cooling inorganic compound filling 2 to form a cable inorganic mineral insulating tape 3.
Step 6: and a ceramic fireproof silica gel mud isolating layer 4 is extruded outside the cabling inorganic mineral insulating belt 3 by ceramic fireproof silica gel mud.
And 7: and a metal corrugated sheath 5 is welded and rolled in a seamless manner by adopting a copper metal belt outside the ceramic fireproof fire-resistant silica gel mud isolating layer 4. The structure and the material of the second embodiment of the flexible moisture-proof non-combustible cable are the same as those of the first embodiment, and the second embodiment of the flexible moisture-proof non-combustible moisture-proof cable is mainly characterized in that a liquid silicon rubber coating is further arranged outside the ceramic fireproof fire-resistant silica gel mud moisture-proof layer 13 of the insulated wire core 1, and the wear resistance and the anti-adhesion performance of the insulated wire core 1 are improved through the liquid silicon rubber coating, so that the sliding capacity among the wire cores is improved, the flexibility of the cable is improved, the whole cable is easier to bend and recover, and the service life of the cable. Preferably, the liquid silicone rubber coating has a thickness of 0.01 mm.
The processing steps of the second embodiment are basically the same as those of the first embodiment, except that in step 3, after the ceramic fireproof fire-resistant silica gel moisture-proof layer 13 is extruded outside the core inorganic mineral insulating tape 12, liquid silicone rubber is sprayed outside the ceramic fireproof fire-resistant silica gel moisture-proof layer 13 by using a hot drying tunnel, and then the liquid silicone rubber coating is formed by hot drying and curing, so that the insulated core 1 is formed.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (10)

1. A flexible moisture-proof non-combustible cable comprises an insulation wire core (1) and is characterized in that: the insulated wire core (1) consists of a wire core conductor (11), a wire core inorganic mineral insulating tape (12) wrapped outside the wire core conductor (11) and a ceramic fireproof fire-resistant silica gel mud moisture-proof layer (13) arranged outside the wire core inorganic mineral insulating tape (12); the insulating wire cores (1) are stranded into cables and then are extruded with water release cooling inorganic compound fillers (2), cable forming inorganic mineral insulating belts (3) are arranged outside the water release cooling inorganic compound fillers (2), ceramic fireproof and fire-resistant silica gel mud isolating layers (4) are arranged outside the cable forming inorganic mineral insulating belts (3), and metal corrugated sheaths (5) are arranged outside the ceramic fireproof and fire-resistant silica gel mud isolating layers (4).
2. The flexible moisture-resistant noncombustible cable according to claim 1, wherein: a liquid silicone rubber coating is also arranged outside the ceramic fireproof and fireproof silica gel mud moisture-proof layer (13) of the insulated wire core (1).
3. A flexible moisture-proof non-combustible cable according to claim 1 or 2, characterized in that: the core conductor (11) is an oxygen-free copper conductor and is formed by drawing, annealing and stranding a plurality of copper wires; the wire core inorganic mineral insulating tape (12) is a halogen-free inorganic mineral insulating tape.
4. The flexible moisture-resistant noncombustible cable according to claim 3, wherein: the volume resistivity of the halogen-free inorganic mineral insulating tape at ambient temperature is not less than 5 multiplied by 1012 omega.m, and the halogen-free inorganic mineral insulating tape does not break down at the high temperature of 1000 ℃ for 90 min; the ceramic fireproof silica gel mud moisture-proof layer (13) has the volume resistivity of more than or equal to 5 multiplied by 1013 omega.m, the breakdown strength of more than or equal to 20kV/mm and the high temperature resistance of 2000 ℃.
5. A flexible moisture-proof non-combustible cable according to claim 1 or 2, characterized in that: the water-releasing temperature-reducing inorganic compound filling (2) is a metal inorganic compound containing aluminum hydroxide AL (OH)3 and/or magnesium hydroxide Mg (OH)2 with water-releasing temperature-reducing characteristics.
6. A flexible moisture-proof non-combustible cable according to claim 1 or 2, characterized in that: the water-releasing and temperature-reducing inorganic compound filling (2) comprises sodium silicate, aluminum hydroxide, magnesium hydroxide and a cementing agent, wherein the ratio of the aluminum hydroxide to the magnesium hydroxide is 2:1, and the temperature for water releasing and temperature reducing of the aluminum hydroxide is lower than the temperature for water releasing and temperature reducing of the magnesium hydroxide.
7. The flexible moisture-resistant noncombustible cable according to claim 6, wherein: the sodium silicate has a cementing effect in air CO2Can separate out a new ecological SiO under the action2Colloid, chemical equation as follows:
NaO·mSiO2+CO2+nH2O＝NaCO3+mSiO2·nH2O；
after adding aluminium hydroxide, magnesium hydroxide and cementing agent, the precipitated colloid SiO with great activity2Adhering the aluminum hydroxide particles and the magnesium hydroxide particles to the surfaces of the aluminum hydroxide particles and the magnesium hydroxide particles to bond the aluminum hydroxide particles and the magnesium hydroxide particles together; the colloid SiO continuously absorbs water from the aluminum hydroxide and the magnesium hydroxide particles2The water content is continuously reduced, and the aluminum hydroxide and the magnesium hydroxide are tightly cemented on the surfaces of the particles to form a three-dimensional network structure.
8. A flexible moisture-proof non-combustible cable according to claim 1 or 2, characterized in that: the material of the cabling inorganic mineral insulating belt (3) and the ceramic fireproof and fireproof silica gel mud isolating layer (4) is the same as the cable core inorganic mineral insulating belt (12) and the ceramic fireproof and fireproof silica gel mud damp-proof layer (13) respectively, and the metal corrugated sheath (5) is formed by rolling after copper metal belt is welded in a seamless mode.
9. A method for manufacturing a flexible moisture-proof non-combustible cable according to any one of claims 1 to 8, characterized by comprising the steps of:
step 1: drawing, annealing and twisting a plurality of copper wires to form a wire core conductor (11);
step 2: a wire core inorganic mineral insulating tape (12) is wrapped outside the wire core conductor (11) by adopting a halogen-free inorganic mineral insulating tape;
and step 3: a ceramic fireproof fire-resistant silica gel mud damp-proof layer (13) is extruded outside the inorganic mineral insulating tape (12) of the wire core by ceramic fireproof fire-resistant silica gel mud to form an insulating wire core (1);
and 4, step 4: after twisting a single or a plurality of insulated wire cores (1) into a cable, extruding and filling (2) a water-releasing and temperature-reducing inorganic compound;
and 5: wrapping a cable-forming inorganic mineral insulating tape (3) outside the water-releasing and temperature-reducing inorganic compound filling (2) by adopting a halogen-free inorganic mineral insulating tape;
step 6: a ceramic fireproof fire-resistant silica gel mud isolating layer (4) is extruded outside the cabling inorganic mineral insulating tape (3) by ceramic fireproof fire-resistant silica gel mud;
and 7: a copper metal belt is adopted to perform seamless welding and rolling on the metal corrugated sheath (5) outside the ceramic fireproof and fireproof silica gel mud isolating layer (4);
10. the method for manufacturing a flexible moisture-proof non-combustible cable according to claim 9, wherein: and step 3, spraying liquid silicone rubber outside the ceramic fireproof and fire-resistant silica gel mud moisture-proof layer (13), and then baking and curing to form a liquid silicone rubber coating.
CN201911304915.0A 2019-12-17 2019-12-17 Flexible moisture-proof non-combustible cable and manufacturing method thereof Pending CN111063484A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114596998A (en) * 2022-03-14 2022-06-07 金龙电缆科技有限公司 Preparation method of high-flame-retardant fireproof cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114596998A (en) * 2022-03-14 2022-06-07 金龙电缆科技有限公司 Preparation method of high-flame-retardant fireproof cable
CN114596998B (en) * 2022-03-14 2023-12-29 金龙电缆科技有限公司 Preparation method of high-flame-retardance fireproof cable

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