CN110459360B - Intrinsic safety cable for environment-friendly explosion-proof place - Google Patents

Intrinsic safety cable for environment-friendly explosion-proof place Download PDF

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Publication number
CN110459360B
CN110459360B CN201910876561.0A CN201910876561A CN110459360B CN 110459360 B CN110459360 B CN 110459360B CN 201910876561 A CN201910876561 A CN 201910876561A CN 110459360 B CN110459360 B CN 110459360B
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cable
parts
environment
explosion
intrinsically
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CN110459360A (en
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晏政
章迁平
储贤民
蒋梓钰
吴亚利
杨彬
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Jiangsu Yuancheng Cable Co ltd
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Jiangsu Yuancheng Cable 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
    • 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
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
    • 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
    • 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
    • H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
    • H01B7/1815—Protections not provided for in groups H01B7/182 - H01B7/26 composed of longitudinal inserts
    • 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
    • H01B7/1835—Sheaths comprising abrasive charges
    • 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
    • H01B7/1895—Internal space filling-up means
    • 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
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H01B7/228—Metal braid
    • 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
    • H01B7/29—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Insulated Conductors (AREA)

Abstract

The invention discloses an intrinsic safety cable for an environment-friendly explosion-proof place, which belongs to the technical field of cable application and comprises three cable cores, wherein two groups of twisted wire cores are arranged in each cable core, each group of wire cores comprises a copper conductor, a first semi-conductive nylon belt wrapped on the outer side of the copper conductor and a crosslinked polyethylene insulating layer extruded on the outer side of the first semi-conductive nylon belt, so that the intrinsic safety cable can realize better insulating and shielding performance, can effectively prevent electromagnetic interference, has small interference force caused by external magnetic fields, has excellent fireproof and explosion-proof performances, good safety performance, high strength, and good compression and pressure resistance, and solves the problems of poor physical performance, large smoke amount during combustion and large amount of toxic and harmful gas during combustion of the existing cable. Compared with the traditional intrinsic safety cable, each performance can reach or even exceed the national standard requirement, and is superior to the existing similar cable.

Description

Intrinsic safety cable for environment-friendly explosion-proof place
Technical Field
The invention relates to the technical field of cable application, in particular to an intrinsic safety cable for an environment-friendly explosion-proof place.
Background
The cable is a rope-like cable formed by twisting several or groups of wires (at least two wires in each group), wherein each group of wires are mutually insulated and are often twisted around a center, and the whole outside is covered with a highly insulating coating. The cable has an inner energized, outer insulated feature.
With the rapid development of science and technology, the electronic control technology is generally applied, electric parts are more and more, electric wires are more and more, and particularly, the explosion-proof property requirements of industries such as chemistry, petroleum and the like on cables are higher and higher. The problem to be solved is how to make a large number of wire harnesses more safely and reasonably arranged in explosion-proof places such as chemical industry and the like, so that the process of industrial manufacturing production is safer, and the problem is faced by explosion-proof places such as chemical industry and the like.
Disclosure of Invention
1. Aiming at the problems in the prior art, the invention aims to provide an intrinsic safety cable for an environment-friendly explosion-proof place, which can realize better insulation and shielding performance, can effectively prevent electromagnetic interference, has small interference force by an external magnetic field, has excellent fireproof and explosion-proof performance, good safety performance, high strength, compression resistance and pressure resistance, and solves the problems of poor physical performance, large smoke generation during combustion and large amount of toxic and harmful gas generated during combustion of the conventional cable.
2. The technical scheme is to solve the problems, and the invention adopts the following technical scheme.
The utility model provides an environment-friendly explosion-proof place is with this ampere of cable, includes three cable core, every the inside of cable core is equipped with two sets of twisted wire core, every group the sinle silk all includes a copper conductor, around the first semiconductive nylon tape of package in the outside of copper conductor and crowded cross-linked polyethylene insulating layer in the semiconductive nylon tape outside, the cable core still includes outside two sets of sinle silk from inside to outside first polyester tape, first tinned copper wire braided shield layer and the second polyester tape of package, every adjacent two all laminate between the cable core and be provided with triangle-shaped rubber skeleton, every triangle-shaped rubber skeleton is inside all to be filled with the fibrous filling layer, around the package in the outside of three cable core has the third polyester tape, the outside of third polyester tape has wrapped gradually second semiconductive nylon tape, second tinned copper wire braided shield layer, armor protective layer, low smoke and zero halogen flame retardant irradiation cross-linked polyolefin sheath from inside to outside.
Further, the three cable cores are arranged in a triangular shape and are in contact with each other.
Furthermore, the copper conductor is made of No. 1 red copper, so that the cable can be prevented from being in virtual connection under the condition of being connected with equipment, the conductor is more round, and the external electric field of the conductor is more uniform.
Furthermore, the glass silk floss filling layers are filled in the inner gaps of the first polyester belt and the third polyester belt, and the glass silk floss has good fireproof and fire-resistant capabilities, so that the fireproof performance of the cable is effectively improved.
Further, the fiber filling layer is formed by mixing glass fibers and polypropylene fibers, the glass fibers and the polypropylene fibers are mixed according to the mass ratio of 2:1, and the fiber filling layer is filled in the triangular rubber skeleton, so that the compression buffer performance of the triangular rubber skeleton can be effectively enhanced, and the strength of the cable is effectively improved.
Furthermore, the filling pipe is arranged in the third polyester belt, the rodenticide is filled in the filling pipe, the rodenticide is a solid rodenticide, and the rodenticide can be used for repelling mice, so that the mice are unwilling to get close to the cable, and the cable is effectively protected from being bitten by the mice.
Furthermore, the armor protective layer adopts aluminum alloy, and the armor layer that aluminum alloy made can be to the cable integral type effective protection, improves the bulk strength of cable.
Further, the preparation method of the low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath comprises the following steps: according to the weight portions, 100 to 120 portions of matrix resin, 50 to 60 portions of tributyl phosphate, 10 to 20 portions of graphite, 5 to 10 portions of dibutyl hydroxy toluene, 10 to 20 portions of modified clay, 4 to 8 portions of diamond and 2 to 4 portions of vinyl triethoxysilane coupling agent are subjected to banburying at the temperature of between 150 and 180 ℃ and then are extruded by double screws, thin-passed and vulcanized to obtain the low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath.
Further, the matrix resin is prepared by mixing 40-80 parts of ethylene-vinyl acetate copolymer, 20-35 parts of linear low density polyethylene and 20-30 parts of epoxy reaction compatilizer.
Further, the preparation method of the modified clay comprises the following steps: adding 30-45 parts of clay, 5-10 parts of toluene, 10-15 parts of ethylene glycol monomethyl ether and 15-25 parts of vinyl triethoxysilane silane coupling agent into a supercritical reaction device according to parts by weight, sealing, introducing carbon dioxide to 25-45MPa and reacting for 1.5 hours at 65-75 ℃, then removing the pressure of the carbon dioxide, filtering, and drying in vacuum to obtain silane coupling agent modified clay; according to the weight portion, 20 to 25 portions of silane coupling agent modified clay, 20 to 40 portions of glutaraldehyde solution with the mass fraction of 8 percent and 20 to 30 portions of xanthan gum are taken to react for 2 to 3.5 hours under the condition of the temperature of 55 to 70 ℃, then 10 to 20 portions of tannic acid and 5 to 10 portions of dicumyl peroxide are added, and the mixture is stirred for 2 to 4 hours, and then the modified clay is obtained through pressure relief, centrifugal separation, washing and vacuum drying.
3. Compared with the prior art, the invention has the advantages that:
(1) The triangular rubber frameworks are arranged between the cable cores in the cable, so that the compression resistance and toughness of the cable are effectively improved, meanwhile, the triangular rubber frameworks can squeeze and position the cable cores, and the cable cores are effectively prevented from shifting inside the cable; meanwhile, the fiber filling layer is filled in the triangular rubber skeleton, so that the compression buffer performance of the triangular rubber skeleton can be effectively enhanced, and the strength of the cable is effectively improved.
(2) A layer of semi-conductive nylon tape is wrapped outside the conductor, so that a good effect is achieved on homogenizing an electric field around the conductor and reducing capacitance and inductance; the insulating layer of crosslinked polyethylene is used for insulation, and the crosslinked polyethylene is a nonlinear material and has a better insulating effect.
(3) The super-shielding combination formed by combining a layer of semi-conductive nylon belt and the tinned copper wire shielding is adopted, the mutual shielding effect of cable cores and the effect of shielding the cable outside are better, and the explosion-proof characteristic of the cable is better.
(4) The low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath is adopted to protect the whole cable, so that the problems that the existing flame-retardant wire and cable material is not high-temperature resistant, poor in physical property, large in smoke generation amount during combustion and capable of generating a large amount of toxic and harmful gases during combustion are solved. And the silicon carbide is added in the preparation process, so that the wear resistance and impact resistance of the cable surface are effectively enhanced, the density of the cable is greatly improved, dust generation is reduced, and the oil resistance of the cable is increased.
(5) The modified clay is added in the preparation process of the low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath, so that the flame retardant property of the cable is further improved, and the anti-interference property of the cable can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural view of a cable core according to the present invention.
The cable comprises a 101 cable core, a 1 copper conductor, a 2 first semiconductive nylon belt, a 3 crosslinked polyethylene insulating layer, a 4 first polyester belt, a 5 first tinned copper wire braided shielding layer, a 6 second polyester belt, a 7 third polyester belt, an 8 triangular rubber skeleton, a 9 fiber filling layer, a 10 filling pipe, a 11 rodenticide, a 12 glass silk floss filling layer, a 13 second semiconductive nylon belt, a 14 second tinned copper wire braided shielding layer, a 15 armor protection layer and a 16 low smoke zero halogen flame retardant irradiation crosslinked polyolefin sheath.
Description of the embodiments
The drawings in the embodiments of the present invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only a few embodiments of the present invention; but not all embodiments, are based on embodiments in the present invention; all other embodiments obtained by those skilled in the art without undue burden; all falling within the scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1: referring to fig. 1-2, an intrinsic safety cable for an environment-friendly explosion-proof place comprises three cable cores 101, wherein two groups of twisted wire cores are arranged in each cable core 101, each group of wire cores comprises a copper conductor 1, a first semi-conductive nylon tape 2 wrapped on the outer side of the copper conductor 1, and a crosslinked polyethylene insulating layer 3 extruded on the outer side of the first semi-conductive nylon tape 2, each cable core 101 further comprises a first polyester tape 4, a first tinned copper wire woven shielding layer 5 and a second polyester tape 6 wrapped outside the two groups of wire cores from inside to outside, a triangular rubber skeleton 8 is arranged between every two adjacent cable cores 101 in a laminating mode, a fiber filling layer 9 is filled in each triangular rubber skeleton 8, a third polyester tape 7 is wrapped on the outer side of each cable core 101, and a second semi-conductive nylon tape 13, a second tinned copper wire woven shielding layer 14, an armor 15 and a low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath 16 are sequentially wrapped on the outer side of the third polyester tape 7 from inside to outside.
Set up triangle-shaped rubber skeleton 8 between cable core 101 in the cable, effectually improved compressive capacity and toughness of cable, triangle-shaped rubber skeleton 8 can extrude the location to cable core 101 simultaneously, effectively avoids cable core 101 to take place the aversion phenomenon in the cable inside.
A layer of semi-conductive nylon tape is wrapped outside the conductor, so that a good effect is achieved on homogenizing an electric field around the conductor and reducing capacitance and inductance; the insulating layer of crosslinked polyethylene is used for insulation, and the crosslinked polyethylene is a nonlinear material and has a better insulating effect.
The super-shielding combination formed by combining a layer of semi-conductive nylon belt and the tinned copper wire shielding is adopted, the mutual shielding effect of cable cores and the effect of shielding the cable outside are better, and the explosion-proof characteristic of the cable is better.
The three cable cores 101 are arranged in a triangle shape and are in contact with each other.
The copper conductor 1 is made of No. 1 red copper, so that the cable can be guaranteed to be completely eradicated from virtual connection under the condition of being connected with equipment, the conductor is more round, and the external electric field of the conductor is more uniform.
The glass silk floss filling layer 12 is filled in the internal gaps of the first polyester belt 4 and the third polyester belt 7, and the glass silk floss has better fireproof and fire-resistant capabilities, so that the fireproof performance of the cable is effectively improved.
The fiber filling layer 9 is formed by mixing glass fibers and polypropylene fibers, the glass fibers and the polypropylene fibers are mixed according to the mass ratio of 2:1, and the fiber filling layer 9 is filled in the triangular rubber skeleton 8, so that the compression buffer performance of the triangular rubber skeleton 8 can be effectively enhanced, and the strength of the cable is effectively improved.
The third polyester belt 7 is internally provided with a filling pipe 10, the filling pipe 10 is internally filled with a rodenticide 11, the rodenticide 11 is a solid rodenticide, and the rodenticide can be used for repelling mice, so that the mice are unwilling to approach the cable, and the cable is effectively protected from being bitten by the mice.
The armor protection layer 15 adopts the aluminum alloy, and the armor layer that the aluminum alloy was made can be to the cable integral type effective protection, improves the bulk strength of cable.
The preparation method of the low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath 16 comprises the following steps: according to parts by weight, 100-120 parts of matrix resin, 50-60 parts of tributyl phosphate, 10-20 parts of graphite, 5-10 parts of dibutyl hydroxy toluene, 10-20 parts of modified clay, 4-8 parts of diamond and 2-4 parts of vinyl triethoxysilane coupling agent are subjected to banburying at 150-180 ℃ and are extruded by double screws and are thinned, and vulcanization is carried out to obtain the low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath 16; wherein the matrix resin is prepared by mixing 40-80 parts of ethylene-vinyl acetate copolymer, 20-35 parts of linear low density polyethylene and 20-30 parts of epoxy reaction compatilizer.
The low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath is adopted to protect the whole cable, so that the problems that the existing flame-retardant wire and cable material is not high-temperature resistant, poor in physical property, large in smoke generation amount during combustion and capable of generating a large amount of toxic and harmful gases during combustion are solved. Compared with the traditional rubber sheath, each performance can reach or even exceed the national standard requirement, and is superior to the traditional similar rubber sheath. And the silicon carbide is added in the preparation process, so that the wear resistance and impact resistance of the cable surface are effectively enhanced, the density of the cable is greatly improved, dust generation is reduced, and the oil resistance of the cable is increased.
The preparation method of the modified clay comprises the following steps: adding 30-45 parts of clay, 5-10 parts of toluene, 10-15 parts of ethylene glycol monomethyl ether and 15-25 parts of vinyl triethoxysilane silane coupling agent into a supercritical reaction device according to parts by weight, sealing, introducing carbon dioxide to 25-45MPa and reacting for 1.5 hours at 65-75 ℃, then removing the pressure of the carbon dioxide, filtering, and drying in vacuum to obtain silane coupling agent modified clay; according to the weight portion, 20 to 25 portions of silane coupling agent modified clay, 20 to 40 portions of glutaraldehyde solution with the mass fraction of 8 percent and 20 to 30 portions of xanthan gum are taken to react for 2 to 3.5 hours under the condition of the temperature of 55 to 70 ℃, then 10 to 20 portions of tannic acid and 5 to 10 portions of dicumyl peroxide are added, and the mixture is stirred for 2 to 4 hours, and then the modified clay is obtained through pressure relief, centrifugal separation, washing and vacuum drying.
The modified clay is added in the preparation process of the low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath 16, so that the flame retardant property of the cable is further improved, and the anti-interference property of the cable can be effectively improved.
In summary, compared with the existing cable, the cable has better insulation and shielding performance, can effectively prevent electromagnetic interference, has small interference force by an external magnetic field, has excellent fireproof and explosion-proof performance, good safety performance, high strength, compression resistance and pressure resistance, and solves the problems of poor physical performance, large smoke generation amount during combustion and large amount of toxic and harmful gas generated during combustion of the existing cable. Compared with the traditional intrinsic safety cable, each performance can reach or even exceed the national standard requirement, and is superior to the existing similar cable.
The above; is only a preferred embodiment of the present invention; the scope of the invention is not limited in this respect; any person skilled in the art is within the technical scope of the present disclosure; equivalent substitutions or changes are made according to the technical proposal of the invention and the improved conception thereof; are intended to be encompassed within the scope of the present invention.

Claims (7)

1. An intrinsically safe cable for an environment-friendly explosion-proof place comprises three cable cores (101), and is characterized in that: each cable core (101) is internally provided with two groups of twisted wire cores, each wire core comprises a copper conductor (1), a first semiconductive nylon belt (2) wrapped outside the copper conductor (1) and a crosslinked polyethylene insulating layer (3) extruded outside the first semiconductive nylon belt (2), each cable core (101) further comprises a first polyester belt (4), a first tinned copper wire woven shielding layer (5) and a second polyester belt (6) wrapped outside the two groups of wire cores from inside to outside, a triangular rubber skeleton (8) is attached between every two adjacent cable cores (101), a fiber filling layer (9) is filled inside each triangular rubber skeleton (8), a third polyester belt (7) is wrapped outside the three cable cores (101), and a second semiconductive nylon belt (13), a second tinned copper wire woven shielding layer (14), an armor protection layer (15) and a low-smoke halogen-free flame-retardant crosslinked polyolefin sheath (16) are sequentially wrapped outside the third polyester belt (7);
the preparation method of the low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath (16) comprises the following steps: according to parts by weight, 100-120 parts of matrix resin, 50-60 parts of tributyl phosphate, 10-20 parts of graphite, 5-10 parts of dibutyl hydroxy toluene, 10-20 parts of modified clay, 4-8 parts of diamond and 2-4 parts of vinyl triethoxysilane coupling agent are banburying and refined at 150-180 ℃, then are extruded by double screws and are thinned and vulcanized to obtain the low-smoke halogen-free flame-retardant irradiation crosslinked polyolefin sheath (16);
the matrix resin is prepared by mixing 40-80 parts of ethylene-vinyl acetate copolymer, 20-35 parts of linear low density polyethylene and 20-30 parts of epoxy reaction compatilizer;
the preparation method of the modified clay comprises the following steps: adding 30-45 parts of clay, 5-10 parts of toluene, 10-15 parts of ethylene glycol monomethyl ether and 15-25 parts of vinyl triethoxysilane silane coupling agent into a supercritical reaction device according to parts by weight, sealing, introducing carbon dioxide to 25-45MPa and reacting for 1.5 hours at 65-75 ℃, then removing the pressure of the carbon dioxide, filtering, and drying in vacuum to obtain silane coupling agent modified clay; according to the weight portion, 20 to 25 portions of silane coupling agent modified clay, 20 to 40 portions of glutaraldehyde solution with the mass fraction of 8 percent and 20 to 30 portions of xanthan gum are taken to react for 2 to 3.5 hours under the condition of the temperature of 55 to 70 ℃, then 10 to 20 portions of tannic acid and 5 to 10 portions of dicumyl peroxide are added, and the mixture is stirred for 2 to 4 hours, and then the modified clay is obtained through pressure relief, centrifugal separation, washing and vacuum drying.
2. The intrinsically-safe cable for the environment-friendly explosion-proof place according to claim 1, wherein: the three cable cores (101) are arranged in a triangular shape and are in contact with each other.
3. The intrinsically-safe cable for the environment-friendly explosion-proof place according to claim 1, wherein: the copper conductor (1) is a solid copper conductor made of No. 1 red copper.
4. The intrinsically-safe cable for the environment-friendly explosion-proof place according to claim 1, wherein: the inner gaps of the first polyester belt (4) and the third polyester belt (7) are filled with glass floss filling layers (12).
5. The intrinsically-safe cable for the environment-friendly explosion-proof place according to claim 1, wherein: the fiber filling layer (9) is formed by mixing glass fibers and polypropylene fibers, and the glass fibers and the polypropylene fibers are mixed according to the mass ratio of 2:1.
6. The intrinsically-safe cable for the environment-friendly explosion-proof place according to claim 1, wherein: the inside of third polyester area (7) is equipped with filling tube (10), filling tube (10) inside is filled with rodenticide (11), rodenticide (11) are solid rodenticide.
7. The intrinsically-safe cable for the environment-friendly explosion-proof place according to claim 1, wherein: the armor protection layer (15) adopts aluminum alloy.
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CN112103714B (en) * 2020-09-18 2021-12-31 安徽华星电缆集团有限公司 High-performance antistatic coupling variable frequency cable
CN117649974B (en) * 2023-10-17 2024-09-03 江苏赛德电气有限公司 Flexible fireproof measurement cable for high-radiation-resistant nuclear island of nuclear power station and preparation method thereof

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CN104282380A (en) * 2014-10-24 2015-01-14 安徽电信器材贸易工业有限责任公司 Controlling cable
CN106205802A (en) * 2016-08-30 2016-12-07 无锡江南电缆有限公司 A kind of copper core cross-linked polyethylene insulated steel wire armored Anti-termite power cable
CN107369503A (en) * 2017-08-04 2017-11-21 远东电缆有限公司 Wisdom energy wind-powered electricity generation light-duty fire-retardant midium voltage cable of environmentally friendly oil resistant and production technology
CN108831600A (en) * 2018-06-21 2018-11-16 安徽意力电缆有限公司 A kind of environmental protection oilproof flame retardant rail transit locomotive cable

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