CN118969385A - A high voltage special-shaped conductor power cable - Google Patents
A high voltage special-shaped conductor power cable Download PDFInfo
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- CN118969385A CN118969385A CN202411447956.6A CN202411447956A CN118969385A CN 118969385 A CN118969385 A CN 118969385A CN 202411447956 A CN202411447956 A CN 202411447956A CN 118969385 A CN118969385 A CN 118969385A
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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
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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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
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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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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Abstract
本发明涉及电力电缆技术领域，提出了一种高压异形导体电力电缆，由内至外依次包括异形导体、半导电层、内屏蔽层、绝缘层、外屏蔽层、阻水层、铝套层、沥青层、外护套层和导电层，外护套层的原料包括以下质量份的组分：聚乙烯100份、相容剂5~10份、阻燃型增强剂60~70份、抗氧剂0.5~1份、润滑剂1~2份，阻燃型增强剂包括质量比为1:9~9:1的玻璃微珠和氧化镁晶须。通过上述技术方案，解决了相关技术中的高压异形导体电力电缆阻燃性差和机械强度低的问题。The present invention relates to the technical field of power cables, and proposes a high-voltage special-shaped conductor power cable, which includes a special-shaped conductor, a semi-conductive layer, an inner shielding layer, an insulating layer, an outer shielding layer, a water-blocking layer, an aluminum jacket, an asphalt layer, an outer sheath layer and a conductive layer from the inside to the outside. The raw materials of the outer sheath layer include the following components by mass: 100 parts of polyethylene, 5 to 10 parts of a compatibilizer, 60 to 70 parts of a flame-retardant reinforcing agent, 0.5 to 1 part of an antioxidant, and 1 to 2 parts of a lubricant. The flame-retardant reinforcing agent includes glass microspheres and magnesium oxide whiskers in a mass ratio of 1:9 to 9:1. Through the above technical solution, the problems of poor flame retardancy and low mechanical strength of high-voltage special-shaped conductor power cables in the related art are solved.
Description
Technical Field
The invention relates to the technical field of power cables, in particular to a high-voltage special-shaped conductor power cable.
Background
The special-shaped conductor power cable is a power cable adopting special-shaped conductor design, has a more compact structure, and also has a special conductor structure, so that the outer diameter of the conductor is smaller under the condition of keeping the same cross-sectional area, and the power cable has low resistivity, thereby having good conductive performance. In addition, the special-shaped conductor power cable has good surface smoothness and creep resistance, and the advantages can ensure the stable operation of the power system, so that the special-shaped conductor power cable is widely applied to various fields.
With the rapid development of national economy, the demand of power infrastructure in various places is increasing, and in order to reduce the energy consumption in the transmission and distribution process, the voltage level of the cable is also increasing, and the demand of high-voltage special-shaped conductor power cables is increasing. Safety is the most important concern when using high-voltage special-shaped conductor power cables, and the flame retardance and mechanical strength of the power cables are important parameters for showing the good or bad safety. The flame retardancy and mechanical strength of high voltage profiled conductor power cables on the market are to be further improved compared to other properties.
Disclosure of Invention
The invention provides a high-voltage special-shaped conductor power cable, which solves the problems of poor flame retardance and low mechanical strength of the high-voltage special-shaped conductor power cable in the related technology.
The technical scheme of the invention is as follows:
The utility model provides a high voltage dysmorphism conductor power cable, includes dysmorphism conductor, semiconductive layer, interior shielding layer, insulating layer, outer shielding layer, water-blocking layer, aluminium cover layer, asphalt layer, oversheath layer and conducting layer from interior to exterior in proper order, the raw materials of oversheath layer include the component of following mass portion: 100 parts of polyethylene, 5-10 parts of compatilizer, 60-70 parts of flame-retardant reinforcing agent, 0.5-1 part of antioxidant and 1-2 parts of lubricant, wherein the flame-retardant reinforcing agent comprises glass beads and magnesium oxide whiskers in a mass ratio of 1:9-9:1.
As a further technical scheme, the glass beads are modified glass beads, the magnesium oxide whiskers are modified magnesium oxide whiskers, and the modified glass beads and the modifier of the modified magnesium oxide whiskers are respectively and independently saturated fatty acids.
According to the invention, the glass beads and the magnesium oxide whiskers are modified by saturated fatty acid, so that the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are further improved.
As a further technical scheme, the modifier of the modified glass beads is saturated fatty acid with 18-26 carbon atoms, and the modifier of the modified magnesium oxide whiskers is saturated fatty acid with 10-18 carbon atoms.
The saturated fatty acid with 18-26 carbon atoms in the invention can be, for example, octadecanoic acid, eicosanoic acid, docosanoic acid, tetracosanoic acid and hexacosanoic acid; the saturated fatty acid having 10 to 18 carbon atoms may be, for example, capric acid, lauric acid, myristic acid, palmitic acid, or stearic acid.
The modifier for limiting the modified glass beads is saturated fatty acid with 18-26 carbon atoms, and the modifier for limiting the modified magnesium oxide whiskers is saturated fatty acid with 10-18 carbon atoms, so that the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are further improved.
As a further technical scheme, the modifier of the modified glass beads is behenic acid, and the modifier of the modified magnesium oxide whiskers is tetradecanoic acid.
According to the invention, the behenic acid modified glass beads and the tetradecanoic acid modified magnesium oxide whiskers are adopted, so that the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are further improved.
As a further technical scheme, the mass ratio of the modified glass beads to the modified magnesium oxide whiskers is 1:0.5-3.
According to the invention, the mass ratio of the modified glass beads to the modified magnesium oxide whiskers is limited to 1:0.5-3, so that the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are further improved.
As a further technical scheme, the raw materials of the modified glass beads comprise a modifier and glass beads in a mass ratio of 1-5:100, and the raw materials of the modified magnesium oxide whiskers comprise a modifier and magnesium oxide whiskers in a mass ratio of 1-5:100.
As a further technical scheme, the preparation method of the modified glass beads comprises the following steps: uniformly mixing the modifier with the solvent, continuously mixing with the glass beads, and drying to obtain modified glass beads; the preparation method of the modified magnesium oxide whisker comprises the following steps: and uniformly mixing the modifier with the solvent, continuously mixing the mixture with the magnesia whisker, and drying to obtain the modified magnesia whisker.
As a further technical scheme, the semiconductive layer is a semiconductive nylon tape.
As a further technical scheme, the insulating layer is a crosslinked polyethylene insulating layer.
As a further technical solution, the compatilizer may be any one or more compatilizers in the field, for example, may be one or two of maleic anhydride grafted polyethylene and maleic anhydride grafted polypropylene, and is preferably maleic anhydride grafted polyethylene.
As a further technical scheme, the antioxidant may be any one or more antioxidants in the field, for example, may be one or two of the antioxidants 1010 and 168.
As a further technical scheme, the lubricant comprises a mixture of silicone powder and one or two of methyl silicone oil and polyethylene wax.
The working principle and the beneficial effects of the invention are as follows:
the invention provides a high-voltage special-shaped conductor power cable which sequentially comprises a special-shaped conductor, a semi-conductive layer, an inner shielding layer, an insulating layer, an outer shielding layer, a water-resistant layer, an aluminum sleeve layer, an asphalt layer, an outer sheath layer and a conductive layer from inside to outside, wherein polyethylene, a compatilizer, a flame-retardant reinforcing agent, an antioxidant and a lubricant are used as raw materials of the outer sheath layer, and glass beads and magnesium oxide whiskers are compounded to serve as the flame-retardant reinforcing agent, so that the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The parameters of the raw materials in the following examples and comparative examples are as follows:
The polyethylene consists of HDPE DMDA-8008H and LLDPE DMDA8007 with the mass ratio of 70:30;
The compatilizer is maleic anhydride grafted polyethylene GR202;
the glass beads are 400 mesh solid glass beads;
The MgO content in the magnesia whisker is more than or equal to 99 percent, the diameter is 0.1-1.0 mu m, and the length is 5-100 mu m.
The utility model provides a high voltage special-shaped conductor power cable, includes dysmorphism conductor, semiconductive nylon belting, semiconductive inner shield layer, crosslinked polyethylene insulating layer, semiconductive outer shield layer, semiconductive buffering water blocking strip, wrinkle aluminium cover, pitch, oversheath and conducting layer from inside to outside in proper order, and the raw materials of oversheath and the method of processing to the pitch surface are as follows:
Example 1
S1, raw materials: 100 parts of polyethylene, 5 parts of compatilizer, 6 parts of glass beads, 54 parts of magnesium oxide whisker, 0.5 part of antioxidant 1010, 0.5 part of methyl silicone oil and 0.5 part of silicone powder;
s2, uniformly mixing the raw materials, and transferring the mixture into an extruder to be melt extruded on the surface of asphalt.
Example 2
S1, raw materials: 100 parts of polyethylene, 10 parts of compatilizer, 7 parts of glass beads, 63 parts of magnesium oxide whisker, 0.5 part of antioxidant 1010, 0.5 part of antioxidant 168, 1 part of polyethylene wax and 1 part of silicone powder;
s2, uniformly mixing the raw materials, and transferring the mixture into an extruder to be melt extruded on the surface of asphalt.
Example 3
S0, dissolving 3 parts of stearic acid in 500 parts of chloroform, adding 100 parts of glass beads, modifying at 45 ℃ for 30min, filtering, and drying to obtain modified glass beads; dissolving 3 parts of stearic acid in 500 parts of chloroform, adding 100 parts of magnesium oxide whisker, modifying at 45 ℃ for 30min, filtering and drying to obtain modified magnesium oxide whisker;
S1, raw materials: 100 parts of polyethylene, 10 parts of compatilizer, 6 parts of modified glass beads, 54 parts of modified magnesium oxide whisker, 0.5 part of antioxidant 1010, 0.5 part of antioxidant 168, 1 part of polyethylene wax and 1 part of silicone powder;
s2, uniformly mixing the raw materials, and transferring the mixture into an extruder to be melt extruded on the surface of asphalt.
Example 4
S0, dissolving 3 parts of n-decanoic acid in 500 parts of chloroform, adding 100 parts of glass beads, modifying at 45 ℃ for 30min, filtering, and drying to obtain modified glass beads; dissolving 3 parts of normal decanoic acid in 500 parts of chloroform, adding 100 parts of magnesium oxide whisker, modifying for 30min at 45 ℃, filtering and drying to obtain modified magnesium oxide whisker;
S1, raw materials: 100 parts of polyethylene, 10 parts of compatilizer, 6 parts of modified glass beads, 54 parts of modified magnesium oxide whisker, 0.5 part of antioxidant 1010, 0.5 part of antioxidant 168, 1 part of polyethylene wax and 1 part of silicone powder;
s2, uniformly mixing the raw materials, and transferring the mixture into an extruder to be melt extruded on the surface of asphalt.
Example 5
S0, dissolving 3 parts of n-decanoic acid in 500 parts of chloroform, adding 100 parts of glass beads, modifying at 45 ℃ for 30min, filtering, and drying to obtain modified glass beads; dissolving 3 parts of stearic acid in 500 parts of chloroform, adding 100 parts of magnesium oxide whisker, modifying at 45 ℃ for 30min, filtering and drying to obtain modified magnesium oxide whisker;
S1, raw materials: 100 parts of polyethylene, 10 parts of compatilizer, 6 parts of modified glass beads, 54 parts of modified magnesium oxide whisker, 0.5 part of antioxidant 1010, 0.5 part of antioxidant 168, 1 part of polyethylene wax and 1 part of silicone powder;
s2, uniformly mixing the raw materials, and transferring the mixture into an extruder to be melt extruded on the surface of asphalt.
Example 6
S0, dissolving 3 parts of stearic acid in 500 parts of chloroform, adding 100 parts of glass beads, modifying at 45 ℃ for 30min, filtering, and drying to obtain modified glass beads; dissolving 3 parts of normal decanoic acid in 500 parts of chloroform, adding 100 parts of magnesium oxide whisker, modifying for 30min at 45 ℃, filtering and drying to obtain modified magnesium oxide whisker;
S1, raw materials: 100 parts of polyethylene, 10 parts of compatilizer, 6 parts of modified glass beads, 54 parts of modified magnesium oxide whisker, 0.5 part of antioxidant 1010, 0.5 part of antioxidant 168, 1 part of polyethylene wax and 1 part of silicone powder;
s2, uniformly mixing the raw materials, and transferring the mixture into an extruder to be melt extruded on the surface of asphalt.
Example 7
The only difference from example 6 is that: stearic acid was replaced with an equal amount of behenic acid.
Example 8
The only difference from example 6 is that: stearic acid was replaced with an equal amount of wax acid.
Example 9
The only difference from example 7 is that: n-capric acid was replaced with an equal amount of myristic acid.
Example 10
The only difference from example 7 is that: n-decanoic acid was replaced with an equal amount of stearic acid.
Example 11
The only difference from example 9 is that: 15 parts of modified glass beads and 45 parts of modified magnesium oxide whiskers.
Example 12
The only difference from example 9 is that: 25 parts of modified glass beads and 35 parts of modified magnesium oxide whiskers.
Example 13
The only difference from example 9 is that: 40 parts of modified glass beads and 20 parts of modified magnesium oxide whiskers.
Example 14
The only difference from example 9 is that: 54 parts of modified glass beads and 6 parts of modified magnesium oxide whiskers.
Comparative example 1
S1, raw materials: 100 parts of polyethylene, 10 parts of compatilizer, 60 parts of glass beads, 0.5 part of antioxidant 1010, 0.5 part of antioxidant 168, 1 part of polyethylene wax and 1 part of silicone powder;
s2, uniformly mixing the raw materials, and transferring the mixture into an extruder to be melt extruded on the surface of asphalt.
Comparative example 2
S1, raw materials: 100 parts of polyethylene, 10 parts of compatilizer, 60 parts of magnesium oxide whisker, 0.5 part of antioxidant 1010, 0.5 part of antioxidant 168, 1 part of polyethylene wax and 1 part of silicone powder;
s2, uniformly mixing the raw materials, and transferring the mixture into an extruder to be melt extruded on the surface of asphalt.
After the outer sheath raw materials of the examples 1-14 and the comparative examples 1-2 are respectively mixed and uniformly melted and extruded to be processed into a sample to be tested, refer to GB/T1040.1-2018, section 1 of determination of Plastic tensile Properties: the test method in the general rule carries out the test of tensile strength, wherein the test speed is 300mm/min, and the test result is the average value of 5 samples; determination of the Combustion behavior by the oxygen index method for plastics, section 2, see GB/T2406.2-2009: method B in room temperature test was subjected to oxygen index test and the test results are recorded in table 1.
Table 1 mechanical strength and flame retardancy of the outer sheath
As can be seen from Table 1, the outer sheath provided by the invention has the tensile strength of more than 16.7MPa, the oxygen index of more than 27.3%, and good mechanical strength and flame retardance, so that the mechanical strength and flame retardance of the high-voltage special-shaped conductor power cable are improved.
Compared with comparative examples 1-2, the glass beads and the magnesium oxide whiskers are added in the embodiment 1, and the obtained outer sheath has higher tensile strength and oxygen index than those of the comparative examples 1-2, so that the glass beads and the magnesium oxide whiskers are compounded to serve as flame retardant reinforcing agents, and the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are improved.
The tensile strength and oxygen index of the outer sheath obtained in examples 3-10 are higher than those of example 1, which shows that the glass beads and the magnesium oxide whiskers are modified by saturated fatty acid respectively, so that the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are further improved.
The tensile strength and the oxygen index of the outer sheath obtained in the example 6 are higher than those of the examples 3-5, which shows that the modifier of the modified glass beads is saturated fatty acid with 18-26 carbon atoms, and the modifier of the modified magnesium oxide whiskers is saturated fatty acid with 10-18 carbon atoms, so that the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are further improved.
The tensile strength and oxygen index of the outer jacket obtained in example 9 are higher than those of the outer jackets in examples 6-8 and 10, which shows that the behenic acid modified glass beads and the tetradecanoic acid modified magnesium oxide whiskers are adopted, so that the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are further improved.
The tensile strength and the oxygen index of the outer sheath obtained in examples 11-13 are higher than those of examples 9 and 14, which shows that the mass ratio of the modified glass beads to the modified magnesium oxide whiskers is 1:0.5-3, and the flame retardance and the mechanical strength of the high-voltage special-shaped conductor power cable are further improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411447956.6A CN118969385B (en) | 2024-10-17 | 2024-10-17 | High-voltage special-shaped conductor power cable |
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| CN202411447956.6A CN118969385B (en) | 2024-10-17 | 2024-10-17 | High-voltage special-shaped conductor power cable |
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| CN118969385B CN118969385B (en) | 2025-01-10 |
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| CN214377750U (en) * | 2021-04-02 | 2021-10-08 | 江苏亨通高压海缆有限公司 | Low-loss alternating-current land cable |
| CN215451010U (en) * | 2021-08-31 | 2022-01-07 | 江西电缆有限责任公司 | 500KV crosslinked polyethylene power cable |
-
2024
- 2024-10-17 CN CN202411447956.6A patent/CN118969385B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002231051A (en) * | 2001-02-05 | 2002-08-16 | Toray Ind Inc | Conductive resin composition and molded article thereof |
| CN1786084A (en) * | 2005-11-23 | 2006-06-14 | 大连理工大学 | Surface modification method in preparing hydroxide chlorinated paraffin wax synergistic fire retardant |
| CN204303435U (en) * | 2014-12-12 | 2015-04-29 | 浙江晨光电缆股份有限公司 | A kind of split isolation volume enlarging high pressure power cable of the insulation that bonds |
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| CN215451010U (en) * | 2021-08-31 | 2022-01-07 | 江西电缆有限责任公司 | 500KV crosslinked polyethylene power cable |
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