CN110993173A - High-temperature cable with insulating silicone rubber sheath and preparation method thereof - Google Patents

High-temperature cable with insulating silicone rubber sheath and preparation method thereof Download PDF

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Publication number
CN110993173A
CN110993173A CN201911211416.7A CN201911211416A CN110993173A CN 110993173 A CN110993173 A CN 110993173A CN 201911211416 A CN201911211416 A CN 201911211416A CN 110993173 A CN110993173 A CN 110993173A
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layer
cable
silicon rubber
insulating
parts
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李小东
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Guangzhou Yatai Cable Technology Co ltd
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Guangzhou Yatai Cable Technology Co ltd
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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
    • H01B7/17—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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C08K7/26—Silicon- containing compounds
    • 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
    • H01B13/02—Stranding-up
    • 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
    • H01B13/06—Insulating conductors or 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/12—Insulating conductors or cables by applying loose fibres
    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/148—Selection of the insulating material therefor
    • 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
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/221—Sheathing; Armouring; Screening; Applying other protective layers filling-up interstices
    • 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
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • 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
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2606—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by braiding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0225—Three or more layers
    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
    • H01B7/0283—Disposition of insulation comprising one or more extruded layers of insulation comprising in addition one or more other layers of non-extruded insulation
    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0291—Disposition of insulation comprising two or more layers of insulation having different electrical properties
    • 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
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • 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
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
    • 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
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating

Abstract

The invention discloses an insulating silicon rubber sheath high-temperature cable and a preparation method thereof, the cable comprises a cable body, the cable body comprises an insulating silicon rubber sheath, a filler and a cable core, the cable core is arranged in the insulating silicon rubber sheath, the filler is arranged in a gap between the insulating silicon rubber sheath and the cable core, the insulating silicon rubber sheath comprises a ceramic silicon rubber layer, a high-density polyolefin polymer layer and a fiber braided layer, the fiber braided layer is wrapped on the surface of the filler, the high-density polyolefin polymer layer covers the outside of the fiber braided layer, the invention uses methyl vinyl silicon rubber as a base material, and the methyl vinyl silicon rubber is subjected to vacuum kneading and mixing to prepare a sizing material which is sintered by high-temperature flame to form a hard ceramic protective layer, so that the cable has good electrical property and excellent waterproof and mildew-proof properties, and can be used in a humid environment for a long time, the circuit can be protected from short circuit and open circuit, thereby ensuring the smoothness of the circuit.

Description

High-temperature cable with insulating silicone rubber sheath and preparation method thereof
Technical Field
The invention relates to the technical field of cables, in particular to an insulating silicon rubber sheath high-temperature cable and a preparation method thereof.
Background
The fire-resistant cable is widely applied to important departments such as high-rise buildings, subways, power plants, nuclear power stations and the like and public places, and in recent years, the field tends to meet the requirement of the low-smoke halogen-free fire-resistant cable, so that a power supply line can keep normal operation for a certain time when a fire disaster occurs, rescue work is facilitated, and casualties and property loss are reduced as far as possible.
At present, magnesium hydroxide mineral insulating fire-resistant cables and mica tape wrapped plastic or rubber composite insulating fire-resistant cables are mostly adopted at home and abroad, and the magnesium hydroxide mineral insulating fire-resistant cables have high manufacturing cost and high laying difficulty; the mica tape has certain instability, many mica tapes are thick, high in hardness and high in adhesive content, and the mica sheet is easy to fall off in the lapping process, so that the quality of the product is difficult to guarantee especially in the manufacturing of small-section fire-resistant cables. In addition, although conventional silicon rubber becomes silicon dioxide to be attached to the surface of a cable conductor after combustion and has certain fire resistance, the silicon dioxide after combustion is powdery and has no adhesive force and strength, and metal core conductors in the electric wire and cable are still easy to contact with each other to cause short circuit, so that the actual using effect is poor.
Disclosure of Invention
The invention aims to provide an insulating silicon rubber sheath high-temperature cable and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme: the cable body comprises an insulating silicon rubber sheath, a filler and a cable core, wherein the cable core is arranged in the insulating silicon rubber sheath, the filler is arranged in a gap between the insulating silicon rubber sheath and the cable core, the insulating silicon rubber sheath comprises a ceramic silicon rubber layer, a high-density polyolefin polymer layer and a fiber woven layer, the fiber woven layer is wrapped on the surface of the filler, the high-density polyolefin polymer layer covers the outside of the fiber woven layer, the ceramic silicon rubber layer is wrapped on the surface of the high-density polyolefin polymer layer, and the filler is made of an inorganic fiber material.
Preferably, the cable core is provided with a plurality of groups, and the cable cores are twisted with each other.
Preferably, the cable core comprises an insulating layer and a conductor, the insulating layer is wrapped outside the conductor, and the conductor is formed by twisting a plurality of tinned copper wires.
Preferably, a copper strip shielding layer is arranged outside the cable core.
A preparation method of an insulating silicon rubber sheath high-temperature cable comprises the following steps:
s1, the ceramic silicon rubber layer comprises the following raw materials in parts by weight: 80-90 parts of methyl vinyl silicone rubber, 10-15 parts of aluminum oxide, 9-18 parts of calcium oxide, 5-15 parts of barium oxide, 5-10 parts of chloroplatinic acid, 15-20 parts of fumed silica, 13-25 parts of silicon carbide and 6-13 parts of silane coupling agent;
s2, preparing ceramic powder: adding ethanol into a silane coupling agent, fully stirring to form a mixed solution, then uniformly mixing and stirring aluminum oxide, calcium oxide and barium oxide, then adding deionized water into the mixed solution, uniformly stirring to form ceramic powder slurry, then mixing and stirring the ceramic powder slurry and the mixed solution, filtering and drying after uniform stirring to obtain active ceramic powder;
s4, preparing a ceramic silicon rubber layer: uniformly mixing methyl vinyl silicone rubber, active ceramic powder, chloroplatinic acid, fumed silica and silicon carbide, pouring the mixture into an extruder, carrying out vacuum kneading and mixing, and finally preparing the rubber material, wherein the extrusion temperature is 26-36 ℃.
Preferably, a plurality of tinned copper wires are twisted to form a single conductor, an insulation layer made of FEP fluoroplastic materials wraps the exterior of the conductor to form a cable core, then the plurality of conductors are combined, fillers made of inorganic fiber materials are filled outside the conductors, a fiber layer is woven on the surface of the fillers after filling is finished, a high-density polyolefin polymer layer is extruded on the surface of the fiber woven layer, finally ceramic silicon rubber is extruded on the high-density polyolefin polymer layer, and then the high-density polyolefin polymer layer is sintered by high-temperature flame to form a hard ceramic protective layer.
Preferably, the ratio of the silane coupling agent to the ethanol is 1: 25.
preferably, the ceramic powder slurry and the mixed solution are stirred at a temperature of 75-80 ℃ for 1 hour.
Preferably, the silane coupling agent is one or more of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltris β -methoxyethoxysilane.
The invention provides an insulating silicon rubber sheath high-temperature cable and a preparation method thereof, and the insulating silicon rubber sheath high-temperature cable has the following beneficial effects:
(1) according to the invention, methyl vinyl silicone rubber is used as a base material, the rubber material is prepared by vacuum kneading and mixing, and the hard ceramic protective layer is formed by sintering of high-temperature flame, so that the cable has good electrical property and excellent waterproof and mildew-proof properties, can be used in a humid environment for a long time, and can protect a circuit from short circuit and open circuit, thereby ensuring the smoothness of the circuit.
(2) According to the invention, the outermost sheath of the ceramic silicon rubber layer is coated with the high-density polyolefin polymer sheath, and the innermost sheath of the ceramic silicon rubber layer is coated with the fiber braided layer, so that three layers of fire-resistant, flame-retardant and heat-insulating materials are arranged outside the cable core, the cable core is better in protection effect, and the cable has a good high-temperature effect.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a side view of the present invention.
In the figure: 100. an insulating silicone rubber sheath; 101. a silicon rubber layer is ceramic; 102. a high density polyolefin polymer layer; 103. a fiber braid layer; 200. a filler; 300. a cable core; 301. an insulating layer; 302. a conductor.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
As shown in fig. 1-2, the present invention provides a technical solution: a high-temperature cable with an insulating silicone rubber sheath comprises a cable body, wherein the cable body comprises the insulating silicone rubber sheath 100, a filler 200 and a cable core 300, the cable core 300 is arranged in the insulating silicone rubber sheath 100, the filler 200 is arranged in a gap between the insulating silicone rubber sheath 100 and the cable core 300, the insulating silicone rubber sheath 100 comprises a ceramic silicone rubber layer 101, a high-density polyolefin polymer layer 102 and a fiber woven layer 103, the fiber woven layer 103 is wrapped on the surface of the filler 200, the high-density polyolefin polymer layer 102 is covered outside the fiber woven layer 103, the ceramic silicone rubber layer 101 is wrapped on the surface of the high-density polyolefin polymer layer 102, and the filler 200 is made of an inorganic fiber material.
Preferably, the cable core 300 is provided with a plurality of groups, and the cable cores 300 are twisted with each other.
Preferably, it is characterized in that: the cable core 300 comprises an insulating layer 301 and a conductor 302, wherein the insulating layer 301 is wrapped outside the conductor 302, and the conductor 302 is formed by twisting a plurality of tinned copper wires.
Preferably, a copper tape shielding layer is arranged outside the cable core 300.
When the high-temperature cable with the insulating silicon rubber sheath and the preparation method thereof work, the insulating silicon rubber sheath 100 is used as the outermost sheath, the inside of the insulating silicon rubber sheath is further coated with the high-density polyolefin polymer layer 102, and the innermost fiber braided layer 103 is added, so that the cable body has three layers of fire-resistant, flame-retardant and heat-insulating materials, and the protection of the inner cable is better.
Example 2
80 parts of methyl vinyl silicone rubber, 10 parts of aluminum oxide, 9 parts of calcium oxide, 5 parts of barium oxide, 5 parts of chloroplatinic acid, 15 parts of fumed silica, 13 parts of silicon carbide and 6 parts of silane coupling agent;
adding ethanol into a silane coupling agent in a ratio of 1: 25, fully stirring to form a mixed solution, then uniformly mixing and stirring aluminum oxide, calcium oxide and barium oxide, then adding deionized water, uniformly stirring to form ceramic powder slurry, then stirring the ceramic powder slurry and the mixed solution at the temperature of 75-80 ℃ for 1 hour, and filtering and drying after uniform stirring to obtain active ceramic powder; uniformly mixing methyl vinyl silicone rubber, active ceramic powder, chloroplatinic acid, fumed silica and silicon carbide, pouring the mixture into an extruder, carrying out vacuum kneading and mixing, and finally preparing a sizing material, wherein the extrusion temperature is 26-36 ℃, twisting a plurality of tinned copper wires to form a single conductor, wrapping an insulating layer made of FEP fluoroplastic outside the conductor to form a cable core, combining a plurality of conductors, filling a filler made of inorganic fiber material outside the conductors, weaving a fiber layer on the surface of the filler after the filling is finished, extruding a high-density polyolefin polymer layer on the surface of a fiber weaving layer, finally extruding ceramic silicone rubber on the high-density polyolefin polymer layer, and sintering the high-density polyolefin polymer layer by using high-temperature flame to form a hard ceramic protective layer.
Example 3
83 parts of methyl vinyl silicone rubber, 12 parts of aluminum oxide, 12 parts of calcium oxide, 8 parts of barium oxide, 7 parts of chloroplatinic acid, 16 parts of fumed silica, 16 parts of silicon carbide and 8 parts of silane coupling agent;
adding ethanol into a silane coupling agent in a ratio of 1: 25, fully stirring to form a mixed solution, then uniformly mixing and stirring aluminum oxide, calcium oxide and barium oxide, then adding deionized water, uniformly stirring to form ceramic powder slurry, then stirring the ceramic powder slurry and the mixed solution at the temperature of 75-80 ℃ for 1 hour, and filtering and drying after uniform stirring to obtain active ceramic powder; uniformly mixing methyl vinyl silicone rubber, active ceramic powder, chloroplatinic acid, fumed silica and silicon carbide, pouring the mixture into an extruder, carrying out vacuum kneading and mixing, and finally preparing a sizing material, wherein the extrusion temperature is 26-36 ℃, twisting a plurality of tinned copper wires to form a single conductor, wrapping an insulating layer made of FEP fluoroplastic outside the conductor to form a cable core, combining a plurality of conductors, filling a filler made of inorganic fiber material outside the conductors, weaving a fiber layer on the surface of the filler after the filling is finished, extruding a high-density polyolefin polymer layer on the surface of a fiber weaving layer, finally extruding ceramic silicone rubber on the high-density polyolefin polymer layer, and sintering the high-density polyolefin polymer layer by using high-temperature flame to form a hard ceramic protective layer.
Example 4
86 parts of methyl vinyl silicone rubber, 14 parts of aluminum oxide, 15 parts of calcium oxide, 12 parts of barium oxide, 9 parts of chloroplatinic acid, 18 parts of fumed silica, 22 parts of silicon carbide and 11 parts of silane coupling agent;
adding ethanol into a silane coupling agent in a ratio of 1: 25, fully stirring to form a mixed solution, then uniformly mixing and stirring aluminum oxide, calcium oxide and barium oxide, then adding deionized water, uniformly stirring to form ceramic powder slurry, then stirring the ceramic powder slurry and the mixed solution at the temperature of 75-80 ℃ for 1 hour, and filtering and drying after uniform stirring to obtain active ceramic powder; uniformly mixing methyl vinyl silicone rubber, active ceramic powder, chloroplatinic acid, fumed silica and silicon carbide, pouring the mixture into an extruder, carrying out vacuum kneading and mixing, and finally preparing a sizing material, wherein the extrusion temperature is 26-36 ℃, twisting a plurality of tinned copper wires to form a single conductor, wrapping an insulating layer made of FEP fluoroplastic outside the conductor to form a cable core, combining a plurality of conductors, filling a filler made of inorganic fiber material outside the conductors, weaving a fiber layer on the surface of the filler after the filling is finished, extruding a high-density polyolefin polymer layer on the surface of a fiber weaving layer, finally extruding ceramic silicone rubber on the high-density polyolefin polymer layer, and sintering the high-density polyolefin polymer layer by using high-temperature flame to form a hard ceramic protective layer.
Example 5
90 parts of methyl vinyl silicone rubber, 15 parts of aluminum oxide, 18 parts of calcium oxide, 15 parts of barium oxide, 10 parts of chloroplatinic acid, 20 parts of fumed silica, 25 parts of silicon carbide and 13 parts of silane coupling agent;
adding ethanol into a silane coupling agent in a ratio of 1: 25, fully stirring to form a mixed solution, then uniformly mixing and stirring aluminum oxide, calcium oxide and barium oxide, then adding deionized water, uniformly stirring to form ceramic powder slurry, then stirring the ceramic powder slurry and the mixed solution at the temperature of 75-80 ℃ for 1 hour, and filtering and drying after uniform stirring to obtain active ceramic powder; uniformly mixing methyl vinyl silicone rubber, active ceramic powder, chloroplatinic acid, fumed silica and silicon carbide, pouring the mixture into an extruder, carrying out vacuum kneading and mixing, and finally preparing a sizing material, wherein the extrusion temperature is 26-36 ℃, twisting a plurality of tinned copper wires to form a single conductor, wrapping an insulating layer made of FEP fluoroplastic outside the conductor to form a cable core, combining a plurality of conductors, filling a filler made of inorganic fiber material outside the conductors, weaving a fiber layer on the surface of the filler after the filling is finished, extruding a high-density polyolefin polymer layer on the surface of a fiber weaving layer, finally extruding ceramic silicone rubber on the high-density polyolefin polymer layer, and sintering the high-density polyolefin polymer layer by using high-temperature flame to form a hard ceramic protective layer.
Example 6
The cables produced in examples 2 to 5 were subjected to a fire resistance test, and the results obtained are shown in the following table:
examples Hardness of Tensile strength Volume resistivity Fire resistance
Example 2 65A 7.2Mpa 3×1015Ω.cm Qualified
Example 3 68A 8.1Mpa 2×1015Ω.cm Qualified
Example 4 71A 8.6Mpa 5×1015Ω.cm Qualified
Example 5 69A 6.9Mpa 3×1015Ω.cm Qualified
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The high-temperature cable with the insulating silicon rubber sheath comprises a cable body and is characterized in that the cable body comprises the insulating silicon rubber sheath (100), a filler (200) and a cable core (300), the cable core (300) is arranged in the insulating silicon rubber sheath (100), and the filler (200) is arranged in the gap between the insulating silicon rubber sheath (100) and the cable core (300), the insulating silicon rubber sheath (100) comprises a ceramic silicon rubber layer (101), a high-density polyolefin polymer layer (102) and a fiber braided layer (103), the fiber braided layer (103) is wrapped on the surface of the filler (200), the high-density polyolefin polymer layer (102) covers the outer part of the fiber braided layer (103), the ceramic silicon rubber layer (101) is wrapped on the surface of the high-density polyolefin polymer layer (102), and the filler (200) is made of inorganic fiber materials.
2. The insulated silicone rubber sheathed high temperature cable of claim 1, wherein: the cable core (300) is provided with a plurality of groups, and the cable cores (300) are mutually twisted.
3. The high-temperature cable with the insulating silicon rubber sheath and the preparation method thereof as claimed in claim 1, wherein the high-temperature cable with the insulating silicon rubber sheath is characterized in that: the cable core (300) comprises an insulating layer (301) and a conductor (302), wherein the insulating layer (301) is wrapped outside the conductor (302), and the conductor (302) is formed by stranding a plurality of tinned copper wires.
4. The insulated silicone rubber sheathed high temperature cable of claim 1, wherein: and a copper strip shielding layer is arranged outside the cable core (300).
5. The method for preparing an insulating silicone rubber sheathed high temperature cable according to any one of claims 1 to 4, wherein: the method comprises the following steps:
s1, the ceramic silicon rubber layer comprises the following raw materials in parts by weight: 80-90 parts of methyl vinyl silicone rubber, 10-15 parts of aluminum oxide, 9-18 parts of calcium oxide, 5-15 parts of barium oxide, 5-10 parts of chloroplatinic acid, 15-20 parts of fumed silica, 13-25 parts of silicon carbide and 6-13 parts of silane coupling agent;
s2, preparing ceramic powder: adding ethanol into a silane coupling agent, fully stirring to form a mixed solution, then uniformly mixing and stirring aluminum oxide, calcium oxide and barium oxide, then adding deionized water into the mixed solution, uniformly stirring to form ceramic powder slurry, then mixing and stirring the ceramic powder slurry and the mixed solution, filtering and drying after uniform stirring to obtain active ceramic powder;
s4, preparing a ceramic silicon rubber layer: uniformly mixing methyl vinyl silicone rubber, active ceramic powder, chloroplatinic acid, fumed silica and silicon carbide, pouring the mixture into an extruder, carrying out vacuum kneading and mixing, and finally preparing the rubber material, wherein the extrusion temperature is 26-36 ℃.
6. The preparation method of the high-temperature cable with the insulating silicone rubber sheath as claimed in claim 5, wherein the preparation method comprises the following steps: stranding a plurality of tinned copper wires to form a single conductor (302), wrapping an insulation layer (301) made of FEP fluoroplastic materials outside the conductor (302) to form a cable core (300), combining the plurality of conductors (302), filling a filler (200) made of inorganic fiber materials outside the conductors, weaving a fiber layer on the surface of the filler (200) after filling is finished, extruding a high-density polyolefin polymer layer on the surface of a fiber woven layer (103), extruding ceramic silicon rubber on the high-density polyolefin polymer layer (102), and sintering the high-density polyolefin polymer layer (102) by using high-temperature flame to form a hard ceramic protective layer.
7. The preparation method of the high-temperature cable with the insulating silicone rubber sheath as claimed in claim 5, wherein the preparation method comprises the following steps: the ratio of the silane coupling agent to the ethanol is 1: 25.
8. the preparation method of the high-temperature cable with the insulating silicone rubber sheath as claimed in claim 5, wherein the preparation method comprises the following steps: the ceramic powder slurry and the mixed solution are stirred for 1 hour at the temperature of 75-80 ℃ while being mixed.
9. The method for preparing the high-temperature cable with the insulating silicon rubber sheath as claimed in claim 5, wherein the silane coupling agent is one or more of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltris β -methoxyethoxysilane.
CN201911211416.7A 2019-12-02 2019-12-02 High-temperature cable with insulating silicone rubber sheath and preparation method thereof Pending CN110993173A (en)

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Application publication date: 20200410