CN110010271B - Weather-proof power cable - Google Patents
Weather-proof power cable Download PDFInfo
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- CN110010271B CN110010271B CN201910308723.0A CN201910308723A CN110010271B CN 110010271 B CN110010271 B CN 110010271B CN 201910308723 A CN201910308723 A CN 201910308723A CN 110010271 B CN110010271 B CN 110010271B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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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
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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
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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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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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
- H01B7/28—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
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- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- 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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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Insulated Conductors (AREA)
Abstract
The invention relates to a weather-resistant power cable which comprises a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive outer sheath, and the semi-conductive outer sheath is composed of components such as nitrile rubber, chloroprene rubber and ethylene vinyl acetate rubber. The cable has excellent elongation at break at low temperature and strong weather resistance, and can be suitable for various extreme environments.
Description
Technical Field
The invention relates to a weather-resistant power cable.
Background
With the rapid development of economic construction in China, the power demand is rising year by year. How to fully utilize the existing line corridor and line facilities, transmit electric quantity as much as possible, reduce line loss and improve transmission efficiency has become a problem which must be considered by the electric power operation department. The area of the alpine region in China occupies about 27.9 percent of the total area of the national soil, most regions such as northeast, inner Mongolia, northwest and the like with abundant energy are in the alpine region, the temperature is usually lower than-50 ℃ in winter, and how to improve the low-temperature reliability of the cable becomes an important technical problem to be solved urgently.
In addition, for some cold-zone large mineral countries such as russia and other countries, the low-temperature resistance of the cable generally has special requirements, particularly for low-temperature mining industry, the cable needs to be fixedly laid at the temperature of-40 ℃ or even lower for conveying power, the requirement is higher that the cable needs to move in a reciprocating motion manner in cooperation with equipment in the equipment mining process, and thus the temperature resistance of the rubber material for the cable is higher.
At present, the requirements of domestic and international universal standards on the low-temperature performance of low-temperature cables are generally only that the breaking elongation is more than or equal to 20 percent under the condition of 40 ℃ below zero, and the requirement is higher by more than or equal to 30 percent. But the user feedback is that although the elongation at break of the existing insulating shielding material meets the national standard requirement, in the using process, the existing insulating shielding material is often too hard to cause inconvenient laying or serious brittle cracks after repeated expectation, and for a medium-high voltage cable, the defect fatal to the cable can be caused, namely, an uneven electric field is formed at the shielding crack, meanwhile, the partial discharge of the shielding crack is greatly increased, and the cable is likely to break down, so that the cable is likely to be scrapped.
Chinese granted patent CN107286406B discloses a semiconductive material for ultra-low temperature resistant cable, which comprises the following raw materials and weight ratio: 50-60 parts of nitrile rubber; 20-30 parts of chloroprene rubber; 10-30 parts of ethylene vinyl acetate rubber; 1-2 parts of an anti-aging agent 4010 NA; 3-5 parts of vaseline; TMTD 1-2 parts; 1-2 parts of DM; 0.2-0.5 part of sulfur; 1-2 parts of dicumyl peroxide; 3-6 parts of zinc oxide; 2-4 parts of magnesium oxide; 40-55 parts of carbon black N330; 20-40 parts of conductive carbon black; 8-12 parts of a plasticizer. According to the description of the granted patent, the prepared cable has the elongation rate of 184 percent at the maximum at the temperature of-45 ℃.
However, laboratory tests show that the technical effects cannot completely meet the requirements of high precision and high weather resistance of the cable in an extremely cold environment, and the cable still has cracking phenomenon and is easy to break down.
Disclosure of Invention
In order to solve the problem that the low-temperature-resistant cable in the prior art cannot completely meet the requirements of high precision and high weather resistance of the cable in an extremely cold environment, the invention provides the following technical scheme:
a weather-resistant power cable comprises a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive material outer sheath.
The semiconductive material outer sheath is composed of the following components in parts by weight: 50-60 parts of nitrile rubber; 20-30 parts of chloroprene rubber; 10-30 parts of ethylene vinyl acetate rubber; 4 parts of an anti-aging agent; 3-5 parts of vaseline; 1-2 parts of tetramethyl thiuram disulfide; 1-2 parts of 2, 2' -dithiodibenzothiazole; 0.2-0.5 part of sulfur; 1-2 parts of dicumyl peroxide; 3-6 parts of zinc oxide; 2-4 parts of magnesium oxide; 40-55 parts of carbon black N330; 20-40 parts of conductive carbon black; 12 parts of a plasticizer; the anti-aging agent is composed of 2-mercaptobenzimidazole samarium complex and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine according to the weight ratio of 1: 1.
The plasticizer is composed of dioctyl phthalate and cyclohexane-1, 2-dioctyl phthalate according to the weight ratio of 3: 1.
The waterproof layer is made of polyurethane waterproof materials.
The technical scheme of the invention has the following beneficial effects:
(1) the combination of nitrile rubber, chloroprene rubber and ethylene vinyl acetate rubber ensures that the cable has excellent tensile elongation at low temperature, and ensures that the material still has good bending performance under the condition of-45 ℃.
(2) The anti-aging agent is selected from a combination of a 2-mercaptobenzimidazole samarium complex and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, the two components are interdependent when taken as a whole, the anti-aging agent can synergistically inhibit or delay the aging process of the cable, and can inhibit the oxidation of a plasticizer, so that the tensile elongation of the cable at low temperature is further improved, and the cable still has good retraction performance at low temperature.
(3) The plasticizer is selected from the combination of dioctyl phthalate and cyclohexane-1, 2-dioctyl phthalate, the two components are interdependent when taken as a whole, the elongation at break of the cable at low temperature can be synergistically improved, the attractive force among polymer molecular chains is weakened, the cold resistance is good, and finally the material is ensured to still have good bending performance when used at the temperature of minus 45 ℃.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
Example 1
A weather-resistant power cable comprises a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive material outer sheath. The semiconductive material outer sheath is composed of the following components in parts by weight: 50 parts of nitrile rubber; 20 parts of chloroprene rubber; 10 parts of ethylene vinyl acetate rubber; 4 parts of an anti-aging agent; 3 parts of vaseline; 1 part of tetramethyl thiuram disulfide; 1 part of 2, 2' -dithiodibenzothiazole; 0.2 part of sulfur; 1 part of dicumyl peroxide; 3 parts of zinc oxide; 2 parts of magnesium oxide; carbon black N33040 parts; 20 parts of conductive carbon black; 12 parts of a plasticizer; the anti-aging agent is composed of 2-mercaptobenzimidazole samarium complex and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine according to the weight ratio of 1: 1. The plasticizer is composed of dioctyl phthalate and cyclohexane-1, 2-dioctyl phthalate according to the weight ratio of 3: 1. The waterproof layer is made of polyurethane waterproof materials.
Example 2
A weather-resistant power cable comprises a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive material outer sheath. The semiconductive material outer sheath is composed of the following components in parts by weight: 55 parts of nitrile rubber; 25 parts of chloroprene rubber; 20 parts of ethylene vinyl acetate rubber; 4 parts of an anti-aging agent; 4 parts of vaseline; 2 parts of tetramethyl thiuram disulfide; 2 parts of 2, 2' -dithiodibenzothiazole; 0.4 part of sulfur; 2 parts of dicumyl peroxide; 5 parts of zinc oxide; 3 parts of magnesium oxide; carbon black N33050 parts; 30 parts of conductive carbon black; 12 parts of a plasticizer; the anti-aging agent is composed of 2-mercaptobenzimidazole samarium complex and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine according to the weight ratio of 1: 1. The plasticizer is composed of dioctyl phthalate and cyclohexane-1, 2-dioctyl phthalate according to the weight ratio of 3: 1. The waterproof layer is made of polyurethane waterproof materials.
Example 3
A weather-resistant power cable comprises a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive material outer sheath. The semiconductive material outer sheath is composed of the following components in parts by weight: 60 parts of nitrile rubber; 30 parts of chloroprene rubber; 30 parts of ethylene vinyl acetate rubber; 4 parts of an anti-aging agent; 5 parts of vaseline; 2 parts of tetramethyl thiuram disulfide; 2 parts of 2, 2' -dithiodibenzothiazole; 0.5 part of sulfur; 2 parts of dicumyl peroxide; 6 parts of zinc oxide; 4 parts of magnesium oxide; carbon black N33055 parts; 40 parts of conductive carbon black; 12 parts of a plasticizer; the anti-aging agent is composed of 2-mercaptobenzimidazole samarium complex and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine according to the weight ratio of 1: 1. The plasticizer is composed of dioctyl phthalate and cyclohexane-1, 2-dioctyl phthalate according to the weight ratio of 3: 1. The waterproof layer is made of polyurethane waterproof materials.
Example 4
A weather-resistant power cable comprises a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive material outer sheath. The semiconductive material outer sheath is composed of the following components in parts by weight: 55 parts of nitrile rubber; 25 parts of chloroprene rubber; 20 parts of ethylene vinyl acetate rubber; 4 parts of an anti-aging agent; 4 parts of vaseline; 2 parts of tetramethyl thiuram disulfide; 2 parts of 2, 2' -dithiodibenzothiazole; 0.4 part of sulfur; 2 parts of dicumyl peroxide; 5 parts of zinc oxide; 3 parts of magnesium oxide; carbon black N33050 parts; 30 parts of conductive carbon black; 12 parts of a plasticizer; the anti-aging agent is only composed of 2-mercaptobenzimidazole samarium complex. The plasticizer is composed of dioctyl phthalate and cyclohexane-1, 2-dioctyl phthalate according to the weight ratio of 3: 1. The waterproof layer is made of polyurethane waterproof materials.
Example 5
A weather-resistant power cable comprises a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive material outer sheath. The semiconductive material outer sheath is composed of the following components in parts by weight: 55 parts of nitrile rubber; 25 parts of chloroprene rubber; 20 parts of ethylene vinyl acetate rubber; 4 parts of an anti-aging agent; 4 parts of vaseline; 2 parts of tetramethyl thiuram disulfide; 2 parts of 2, 2' -dithiodibenzothiazole; 0.4 part of sulfur; 2 parts of dicumyl peroxide; 5 parts of zinc oxide; 3 parts of magnesium oxide; carbon black N33050 parts; 30 parts of conductive carbon black; 12 parts of a plasticizer; the anti-aging agent is only composed of N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine. The plasticizer is composed of dioctyl phthalate and cyclohexane-1, 2-dioctyl phthalate according to the weight ratio of 3: 1. The waterproof layer is made of polyurethane waterproof materials.
Example 6
A weather-resistant power cable comprises a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive material outer sheath. The semiconductive material outer sheath is composed of the following components in parts by weight: 55 parts of nitrile rubber; 25 parts of chloroprene rubber; 20 parts of ethylene vinyl acetate rubber; 4 parts of an anti-aging agent; 4 parts of vaseline; 2 parts of tetramethyl thiuram disulfide; 2 parts of 2, 2' -dithiodibenzothiazole; 0.4 part of sulfur; 2 parts of dicumyl peroxide; 5 parts of zinc oxide; 3 parts of magnesium oxide; carbon black N33050 parts; 30 parts of conductive carbon black; 12 parts of a plasticizer; the anti-aging agent is composed of 2-mercaptobenzimidazole samarium complex and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine according to the weight ratio of 1: 1. The plasticizer consists of dioctyl phthalate only. The waterproof layer is made of polyurethane waterproof materials.
Example 7
A weather-resistant power cable comprises a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive material outer sheath. The semiconductive material outer sheath is composed of the following components in parts by weight: 55 parts of nitrile rubber; 25 parts of chloroprene rubber; 20 parts of ethylene vinyl acetate rubber; 4 parts of an anti-aging agent; 4 parts of vaseline; 2 parts of tetramethyl thiuram disulfide; 2 parts of 2, 2' -dithiodibenzothiazole; 0.4 part of sulfur; 2 parts of dicumyl peroxide; 5 parts of zinc oxide; 3 parts of magnesium oxide; carbon black N33050 parts; 30 parts of conductive carbon black; 12 parts of a plasticizer; the anti-aging agent is composed of 2-mercaptobenzimidazole samarium complex and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine according to the weight ratio of 1: 1. The plasticizer consists of only diisooctyl cyclohexane-1, 2-dicarboxylate. The waterproof layer is made of polyurethane waterproof materials.
The following table details the composition of the antioxidant and plasticizer in examples 2 and 4-7.
In order to verify the low temperature resistance effect of examples 2 and 4 to 7, the cable samples of examples 2 and 4 to 7 were subjected to-45 ℃ elongation at break (%) test, and the results were as follows:
| numbering | Elongation at Break at-45 ℃ (%) |
| Example 2 | 263 |
| Example 4 | 236 |
| Example 5 | 241 |
| Example 6 | 216 |
| Example 7 | 208 |
| CN107286406B example 1 | 184 |
The result shows that (1) the anti-aging agent is selected from the combination of 2-mercaptobenzimidazole samarium complex and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, the two components are interdependent when taken as a whole, the aging process of the cable can be synergistically inhibited or delayed, meanwhile, the oxidation of the plasticizer can be inhibited, the breaking elongation of the cable at low temperature is further improved, and the cable still has good retraction performance at low temperature; (2) the plasticizer is selected from the combination of dioctyl phthalate and cyclohexane-1, 2-dioctyl phthalate, the two components are interdependent when taken as a whole, the elongation at break of the cable at low temperature can be synergistically improved, the attractive force among polymer molecular chains is weakened, the cold resistance is good, and finally the material is ensured to still have good bending performance when used at the temperature of minus 45 ℃.
Claims (1)
1. A weather-resistant power cable is characterized by comprising a cable core, a waterproof layer and a sheath layer from inside to outside, wherein the sheath layer comprises a semi-conductive outer sheath;
the semiconductive material outer sheath is composed of the following components in parts by weight: 55 parts of nitrile rubber; 25 parts of chloroprene rubber; 20 parts of ethylene vinyl acetate rubber; 4 parts of an anti-aging agent; 4 parts of vaseline; 2 parts of tetramethyl thiuram disulfide; 2 parts of 2, 2' -dithiodibenzothiazole; 0.4 part of sulfur; 2 parts of dicumyl peroxide; 5 parts of zinc oxide; 3 parts of magnesium oxide; carbon black N33050 parts; 30 parts of conductive carbon black; 12 parts of a plasticizer;
the anti-aging agent is composed of 2-mercaptobenzimidazole samarium complex and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine according to the weight ratio of 1: 1;
the plasticizer consists of dioctyl phthalate and cyclohexane-1, 2-dioctyl phthalate according to the weight ratio of 3: 1;
the waterproof layer is made of polyurethane waterproof materials;
the elongation at break of the weather-resistant power cable at-45 ℃ is 263%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308723.0A CN110010271B (en) | 2019-04-17 | 2019-04-17 | Weather-proof power cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308723.0A CN110010271B (en) | 2019-04-17 | 2019-04-17 | Weather-proof power cable |
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| Publication Number | Publication Date |
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| CN110010271A CN110010271A (en) | 2019-07-12 |
| CN110010271B true CN110010271B (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910308723.0A Active CN110010271B (en) | 2019-04-17 | 2019-04-17 | Weather-proof power cable |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201174271Y (en) * | 2008-04-08 | 2008-12-31 | 扬州曙光电缆有限公司 | Super high voltage crosslinked cable |
| CN103805021A (en) * | 2012-11-15 | 2014-05-21 | 洛阳骏腾能源科技有限公司 | Macromolecular hot melt adhesive with self-repair function and manufacturing method thereof |
| CN106380647A (en) * | 2016-11-09 | 2017-02-08 | 重庆联邦中北电缆股份有限公司 | Special cable for oil platform |
| CN107286406B (en) * | 2017-06-30 | 2019-04-12 | 上海蓝昊电气有限公司 | A kind of super low-temperature resistant cable semiconductive material |
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Effective date of registration: 20210430 Address after: 066000 north side of Yongxing street, Lulong County, Qinhuangdao City, Hebei Province Applicant after: Guoyou Cable Group Co.,Ltd. Address before: 250000 no.4-2 Chuangye Road, Jitai Road Mechanical Equipment Industrial Park, Taiping Street, Jiyang County, Jinan City, Shandong Province Applicant before: JINAN HONGTAI HUAFENG MACHINERY Co.,Ltd. |
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Effective date of registration: 20231009 Address after: 459000 Southeast corner of the intersection of Xinming Road and Scientific Research Road in High tech Zone, Jiyuan City, Henan Province Patentee after: Guoyou Cable Group (Henan) Co.,Ltd. Address before: 066000 north side of Yongxing street, Lulong County, Qinhuangdao City, Hebei Province Patentee before: Guoyou Cable Group Co.,Ltd. |