CN110473658A - A kind of compound frequency conversion drum cable - Google Patents
A kind of compound frequency conversion drum cable Download PDFInfo
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- CN110473658A CN110473658A CN201810436110.0A CN201810436110A CN110473658A CN 110473658 A CN110473658 A CN 110473658A CN 201810436110 A CN201810436110 A CN 201810436110A CN 110473658 A CN110473658 A CN 110473658A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 15
- 150000001875 compounds Chemical class 0.000 title claims abstract description 7
- 239000004020 conductor Substances 0.000 claims abstract description 38
- 239000010410 layer Substances 0.000 claims description 82
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 35
- 238000009413 insulation Methods 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical class ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 8
- 239000011241 protective layer Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000009954 braiding Methods 0.000 claims description 5
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims description 5
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- 238000004073 vulcanization Methods 0.000 description 3
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- QYAMPIKBANGIEM-UHFFFAOYSA-N chloroethene;hydrochloride Chemical compound Cl.ClC=C QYAMPIKBANGIEM-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
-
- 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
- H01B7/17—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
Landscapes
- Insulated Conductors (AREA)
Abstract
Description
技术领域technical field
本发明涉及一种电缆，具体涉及一种中压卷筒电缆。The invention relates to a cable, in particular to a medium-voltage reel cable.
背景技术Background technique
在港口电缆需求量及品质要求逐渐提升的情况下，各企业都在对电缆进行研究，基本可以满足一般的港机电缆的应用，但使用寿命的长短不一，港机电缆在使用的过程中，频繁移动，容易损伤，导致使用寿命下降。同时，为更好的为港口服务，电缆在使用过程中，更需要将电力，信号及监测同时完成。In the case of the gradual increase in the demand and quality requirements of port cables, various companies are conducting research on cables, which can basically meet the application of general port machinery cables, but the service life varies, and port machinery cables are in use. , frequent movement, easy to damage, resulting in reduced service life. At the same time, in order to better serve the port, the cable needs to complete power, signal and monitoring at the same time during use.
发明内容Contents of the invention
发明目的：本发明的目的是为了克服现有技术中的不足，提供一种集电力、信号及监测一体，电缆品质好，使用寿命长及安全性高的复合变频卷筒电缆。Purpose of the invention: The purpose of the invention is to overcome the deficiencies in the prior art and provide a composite variable frequency reel cable that integrates power, signal and monitoring, has good cable quality, long service life and high safety.
技术方案：为了解决上述技术问题，本发明所述的一种复合变频卷筒电缆，它包括相邻设置的动力线芯单元和组合线芯单元，所述动力线芯单元包括动力线芯导体，在所述动力线芯导体外部依次挤包设有内屏蔽层、绝缘层Ⅰ、外屏蔽层，所述组合线芯单元包括地线芯导体，在所述地线芯导体外部挤包设有绝缘层Ⅱ，在所述绝缘层Ⅱ外部均匀绞合设有若干控制线芯单元，所述控制线芯单元包括控制线芯导体，在所述控制线芯导体外部挤包设有绝缘层Ⅲ，在所述控制线芯单元外部设有编织铜丝屏蔽层，在所述编织铜丝屏蔽层内侧设有铜引流线，在所述编织铜丝屏蔽层外部挤包设有保护层，在所述动力线芯单元和组合线芯单元内侧设有填充条，在所述动力线芯单元和组合线芯单元外侧挤包设有内护套，在所述内护套外部设有编织加强层，在所述编织加强层外部挤包设有外护套。Technical solution: In order to solve the above technical problems, a compound frequency conversion reel cable according to the present invention includes a power core unit and a combined core unit arranged adjacently, the power core unit includes a power core conductor, An inner shielding layer, an insulating layer I, and an outer shielding layer are sequentially extruded on the outside of the power core conductor, and the combined core unit includes a ground core conductor, and an insulation layer is extruded on the outside of the ground core conductor. layer II, a number of control core units are uniformly twisted outside the insulating layer II, and the control core units include control core conductors, and an insulating layer III is extruded outside the control core conductors. A braided copper wire shielding layer is provided on the outside of the control wire core unit, a copper drain wire is arranged inside the braided copper wire shielding layer, a protective layer is extruded on the outside of the braided copper wire shielding layer, Filling strips are provided inside the core unit and the combined core unit, an inner sheath is extruded outside the power core unit and the combined core unit, and a braided reinforcement layer is provided outside the inner sheath. The braided reinforcing layer is extruded and provided with an outer sheath.
所述动力线芯导体、地线芯导体和控制线芯导体都采用镀锡软铜丝束丝或复绞制成，单丝直径不大于0.40mm，绞线节径比小于16倍。The power core conductors, ground core conductors and control core conductors are all made of tinned annealed copper strands or multi-twisted strands, the diameter of the single wire is not greater than 0.40mm, and the pitch diameter ratio of the twisted wires is less than 16 times.
三个动力线芯单元和三个组合线芯单元围绕内部填充条绞合成缆，所述填充条呈马鞍形，所述填充条采用高强度氯丁橡胶制成。Three power core units and three combined core units are twisted into a cable around an inner filler strip in the shape of a saddle made of high-strength neoprene.
所述内屏蔽层、绝缘层Ⅰ、外屏蔽层三层共挤而成，绝缘层Ⅰ厚度为3.0-6.0mm，内屏蔽层和外屏蔽层厚度不大于1.0mm，所述内屏蔽层和外屏蔽层由EVA基材混合导电炭黑制成，所述绝缘层Ⅰ、绝缘层Ⅱ、绝缘层Ⅲ都采用乙丙绝缘制成。The inner shielding layer, the insulating layer I and the outer shielding layer are co-extruded from three layers, the thickness of the insulating layer I is 3.0-6.0mm, the thickness of the inner shielding layer and the outer shielding layer is not more than 1.0mm, the inner shielding layer and the outer shielding layer The shielding layer is made of EVA base material mixed with conductive carbon black, and the insulating layer I, insulating layer II, and insulating layer III are all made of ethylene-propylene insulation.
所述铜引流线为镀锡铜绞线，其截面为1.0mm2。The copper drainage wire is a tinned copper stranded wire with a cross section of 1.0mm 2 .
所述编织铜丝屏蔽层采用单丝为0.10-0.20mm的镀锡铜丝编织而成，编织密度不小于85%。The braided copper wire shielding layer is braided by tinned copper wires with a monofilament of 0.10-0.20mm, and the braiding density is not less than 85%.
所述保护层采用高强度氯化氯乙烯挤包而成，其厚度为0.6-0.8mm。The protective layer is formed by extruding high-strength chlorinated vinyl chloride, and its thickness is 0.6-0.8mm.
所述内护套采用高强度耐磨氯化氯乙烯挤包而成，其厚度不小于4mm。The inner sheath is extruded from high-strength wear-resistant chlorinated vinyl chloride, and its thickness is not less than 4mm.
所述编织加强层采用镀锡铜丝与高强度涤沦丝混合编织而成，编织密度不小于60%，整体强度达到20N/mm2。The braided reinforcing layer is made of mixed braided tinned copper wire and high-strength polyester wire, the braiding density is not less than 60%, and the overall strength reaches 20N/mm 2 .
所述外护套采用高强度耐磨耐油性氯化氯乙烯挤包而成，其厚度不小于4mm。The outer sheath is made of high-strength, wear-resistant and oil-resistant chlorinated vinyl chloride extruded, and its thickness is not less than 4mm.
三个地线芯与控制线芯组合的单元结构与三根动力线芯成缆，成缆时内部按尺寸填充马鞍型填充条，加上成缆外部的内护套结构，将各线芯稳固在相应的位置。动力线芯与地线芯控制线芯及另外的动力线芯都不直接接触。地线芯分为三份，挤包绝缘后绞合控制绝缘线芯，组成的结构单元对称分布于动力线芯的间隙中。电缆整体结构完全对称，适用于变频传输。电缆结构的重力也完全对称，在频繁的拉伸，扭转过程中电缆受力平衡而不容易造成局部受损，这样可以提高电缆的使用寿命。The unit structure combined with three ground wire cores and control wire cores is cabled with three power wire cores. When the cable is formed, the interior is filled with saddle-shaped filler strips according to the size, and the inner sheath structure outside the cable is added to stabilize each core in the cable. corresponding location. The power core is not in direct contact with the ground core, the control core and other power cores. The ground wire core is divided into three parts, and the control insulated wire core is twisted after extruding insulation, and the structural units formed are symmetrically distributed in the gap of the power wire core. The overall structure of the cable is completely symmetrical and suitable for frequency conversion transmission. The gravity of the cable structure is also completely symmetrical. In the process of frequent stretching and torsion, the force of the cable is balanced and it is not easy to cause local damage, which can improve the service life of the cable.
地线芯绝缘外绞合多根控制绝缘线芯，并采用分相屏蔽防止干扰，在屏蔽层内设置铜引流线，保证屏蔽性能的完整。Multiple control insulated wire cores are twisted outside the ground wire core insulation, and phase-separated shielding is used to prevent interference. Copper drain wires are set in the shielding layer to ensure the integrity of the shielding performance.
电缆内挤套采用挤压式生产，将所有线芯稳定在相应的位置，并对所有线芯起到保护作用。电缆结构稳定，满足港口机械频繁移动的工作环境。The inner extrusion sleeve of the cable is produced by extrusion, which stabilizes all wire cores in the corresponding position and protects all wire cores. The cable structure is stable, which meets the working environment of frequent movement of port machinery.
在内外护套之间设置金属与加强纤维组合的耐受外力加强层，提高电缆承受外力的能力。An external force-resistant strengthening layer composed of metal and reinforcing fiber is arranged between the inner and outer sheaths to improve the ability of the cable to withstand external forces.
有益效果：本发明与现有技术相比，其显著优点是：本发明整体结构设置合理，动力线芯导体、地线芯导体和控制线芯导体都采用镀锡软铜丝束丝或复绞制成，单丝直径不大于0.40mm，绞线节径比小于16倍，保证线芯的柔软；绝缘层Ⅰ、绝缘层Ⅱ、绝缘层Ⅲ都采用乙丙绝缘制成，乙丙胶含量不小于50%，电缆绝缘电阻不小于2000MΩ.km，绝缘抗张强度大于8N/mm2，伸长率大于300%，保证绝缘耐拉耐磨并柔软；马鞍形填充条采用高强度氯丁橡胶挤制，挤制过程中不完全硫化，硫化度控制在70%-80%，保持一定的可变形性，在线芯成缆时可以适当调整形状以适应缆芯；内护套完全嵌入到由地线芯外绞合控制线芯的结构单元与动力线芯的间隙之间，并将所有线芯稳定地固定在均匀对称分散的位置，使电缆结构稳定并受力均衡，并且所有线芯相互不接触，防止频繁移动时扭伤线芯；编织加强层采用镀锡铜丝与高强度涤沦丝混合编织而成，编织密度不小于60%，整体强度达到20N/mm2，对电缆在拉伸过程中进行保护；外护套采用高强度耐磨耐油性氯化氯乙烯挤包，厚度不小于4 mm，保护电缆内部结构。Beneficial effects: Compared with the prior art, the present invention has the remarkable advantages that: the overall structure of the present invention is reasonably arranged, and the power core conductor, the ground core conductor and the control core conductor are all made of tinned annealed copper wire bundles or multi-twisted The diameter of the single wire is not more than 0.40mm, and the pitch ratio of the stranded wire is less than 16 times to ensure the softness of the core; the insulating layer I, insulating layer II, and insulating layer III are all made of ethylene-propylene insulation, and the content of ethylene-propylene rubber is not high. Less than 50%, the cable insulation resistance is not less than 2000MΩ.km, the insulation tensile strength is greater than 8N/mm 2 , and the elongation is greater than 300%, ensuring that the insulation is tensile, wear-resistant and soft; the saddle-shaped filling strip is extruded with high-strength neoprene rubber Incomplete vulcanization during the extrusion process, the vulcanization degree is controlled at 70%-80%, and a certain degree of deformability is maintained. When the wire core is cabled, the shape can be adjusted to suit the cable core; the inner sheath is completely embedded in the ground wire Twisting outside the core controls the gap between the structural unit of the core and the power core, and stably fixes all the cores in a uniform, symmetrical and dispersed position, so that the cable structure is stable and the force is balanced, and all the cores do not touch each other , to prevent spraining the wire core during frequent movement; the braided reinforcement layer is made of tinned copper wire and high-strength polyester wire, the braiding density is not less than 60%, and the overall strength reaches 20N/mm 2 . For protection; the outer sheath is extruded with high-strength, wear-resistant and oil-resistant chlorinated vinyl chloride, with a thickness of not less than 4 mm, to protect the internal structure of the cable.
附图说明Description of drawings
图1 是本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
具体实施方式Detailed ways
下面结合附图和实施例对本发明作进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
如图1所示，本发明所述的一种复合变频卷筒电缆，它包括相邻设置的动力线芯单元和组合线芯单元，所述动力线芯单元包括动力线芯导体1，在所述动力线芯导体1外部依次挤包设有内屏蔽层2、绝缘层Ⅰ3、外屏蔽层4，所述组合线芯单元包括地线芯导体5，在所述地线芯导体5外部挤包设有绝缘层Ⅱ6，在所述绝缘层Ⅱ6外部均匀绞合设有若干控制线芯单元，所述控制线芯单元包括控制线芯导体7，在所述控制线芯导体7外部挤包设有绝缘层Ⅲ8，在所述控制线芯单元外部设有编织铜丝屏蔽层9，在所述编织铜丝屏蔽层9内侧设有铜引流线10，在所述编织铜丝屏蔽层9外部挤包设有保护层11，在所述动力线芯单元和组合线芯单元内侧设有填充条12，在所述动力线芯单元和组合线芯单元外侧挤包设有内护套13，在所述内护套13外部设有编织加强层14，在所述编织加强层14外部挤包设有外护套15；所述动力线芯导体1、地线芯导体5和控制线芯导体7都采用镀锡软铜丝束丝或复绞制成，单丝直径不大于0.40mm，绞线节径比小于16倍；三个动力线芯单元和三个组合线芯单元围绕内部填充条12绞合成缆，所述填充条12呈马鞍形，所述填充条12采用高强度氯丁橡胶制成；所述内屏蔽层2、绝缘层Ⅰ3、外屏蔽层4三层共挤而成，绝缘层Ⅰ3厚度为3.0-6.0mm，内屏蔽层2和外屏蔽层4厚度不大于1.0mm，所述内屏蔽层和外屏蔽层由EVA基材混合导电炭黑制成，所述绝缘层Ⅰ3、绝缘层Ⅱ6、绝缘层Ⅲ8都采用乙丙绝缘制成；所述铜引流线10为镀锡铜绞线，其截面为1.0mm2；所述编织铜丝屏蔽层9采用单丝为0.10-0.20mm的镀锡铜丝编织而成，编织密度不小于85%；所述保护层11采用高强度氯化氯乙烯挤包而成，其厚度为0.6-0.8mm；所述内护套13采用高强度耐磨氯化氯乙烯挤包而成，其厚度不小于4mm；所述编织加强层14采用镀锡铜丝与高强度涤沦丝混合编织而成，编织密度不小于60%，整体强度达到20N/mm2；所述外护套15采用高强度耐磨耐油性氯化氯乙烯挤包而成，其厚度不小于4mm。本发明整体结构设置合理，动力线芯导体、地线芯导体和控制线芯导体都采用镀锡软铜丝束丝或复绞制成，单丝直径不大于0.40mm，绞线节径比小于16倍，保证线芯的柔软；绝缘层Ⅰ、绝缘层Ⅱ、绝缘层Ⅲ都采用乙丙绝缘制成，乙丙胶含量不小于50%，电缆绝缘电阻不小于2000MΩ.km，绝缘抗张强度大于8N/mm2，伸长率大于300%，保证绝缘耐拉耐磨并柔软；马鞍形填充条采用高强度氯丁橡胶挤制，挤制过程中不完全硫化，硫化度控制在70%-80%，保持一定的可变形性，在线芯成缆时可以适当调整形状以适应缆芯；内护套完全嵌入到由地线芯外绞合控制线芯的结构单元与动力线芯的间隙之间，并将所有线芯稳定地固定在均匀对称分散的位置，使电缆结构稳定并受力均衡，并且所有线芯相互不接触，防止频繁移动时扭伤线芯；编织加强层采用镀锡铜丝与高强度涤沦丝混合编织而成，编织密度不小于60%，整体强度达到20N/mm2，对电缆在拉伸过程中进行保护；外护套采用高强度耐磨耐油性氯化氯乙烯挤包，厚度不小于4 mm，保护电缆内部结构。As shown in Figure 1, a compound frequency conversion reel cable according to the present invention includes a power core unit and a combined core unit arranged adjacently, and the power core unit includes a power core conductor 1, in which The power line core conductor 1 is extruded in sequence to be provided with an inner shielding layer 2, an insulating layer I3, and an outer shielding layer 4, and the combined core unit includes a ground core conductor 5, which is extruded outside the ground core conductor 5 An insulating layer II6 is provided, and a number of control core units are evenly twisted outside the insulating layer II6, and the control core units include a control core conductor 7, and extruded outside the control core conductor 7 is provided with Insulation layer III8, a braided copper wire shielding layer 9 is provided outside the control wire core unit, a copper drain wire 10 is arranged inside the braided copper wire shielding layer 9, and the outer braided copper wire shielding layer 9 is extruded A protective layer 11 is provided, a filling strip 12 is provided inside the power core unit and the combined core unit, and an inner sheath 13 is extruded outside the power core unit and the combined core unit. A braided reinforcing layer 14 is provided outside the inner sheath 13, and an outer sheath 15 is extruded outside the braided reinforcing layer 14; the power core conductor 1, the ground core conductor 5 and the control core conductor 7 are all made of It is made of tinned annealed copper bundles or multiple twists, the diameter of the single wire is not more than 0.40mm, and the pitch ratio of the twisted wire is less than 16 times; three power core units and three combined core units are twisted around the inner filling strip 12 cable, the filling strip 12 is in the shape of a saddle, and the filling strip 12 is made of high-strength neoprene; The thickness is 3.0-6.0mm, the thickness of the inner shielding layer 2 and the outer shielding layer 4 is not more than 1.0mm, the inner shielding layer and the outer shielding layer are made of EVA base material mixed with conductive carbon black, the insulating layer I3, the insulating layer II6 and insulating layer III8 are both made of ethylene-propylene insulation; the copper drain wire 10 is a tinned copper stranded wire with a cross-section of 1.0mm 2 ; the braided copper wire shielding layer 9 is made of 0.10-0.20mm Tinned copper wire braided, the weaving density is not less than 85%; the protective layer 11 is extruded from high-strength chlorinated vinyl chloride, and its thickness is 0.6-0.8mm; the inner sheath 13 is made of high-strength It is extruded from ground chloride vinyl chloride, and its thickness is not less than 4mm; the braided reinforcing layer 14 is braided by tinned copper wire and high-strength polyester wire, the braiding density is not less than 60%, and the overall strength reaches 20N/ mm 2 ; the outer sheath 15 is extruded from high-strength wear-resistant and oil-resistant chlorinated vinyl chloride, and its thickness is not less than 4mm. The overall structure of the present invention is reasonably arranged, and the power core conductor, the ground core conductor and the control core conductor are all made of tinned annealed copper wire bundles or multiple strands, the diameter of the single wire is not greater than 0.40mm, and the pitch ratio of the stranded wire is less than 16 times, to ensure the softness of the core; insulation layer Ⅰ, insulation layer Ⅱ, and insulation layer Ⅲ are all made of ethylene-propylene insulation, the content of ethylene-propylene rubber is not less than 50%, the cable insulation resistance is not less than 2000MΩ.km, and the insulation tensile strength More than 8N/mm 2 , the elongation is more than 300%, ensuring the insulation is tensile, wear-resistant and soft; the saddle-shaped filling strip is extruded from high-strength neoprene rubber, which is not fully vulcanized during the extrusion process, and the vulcanization degree is controlled at 70%- 80%, maintain a certain degree of deformability, and the shape of the wire core can be adjusted to suit the cable core when it is cabled; the inner sheath is completely embedded in the gap between the structural unit of the ground wire core and the power wire core. between them, and stably fix all the wire cores in uniform and symmetrical scattered positions, so that the cable structure is stable and the force is balanced, and all the wire cores do not touch each other to prevent the wire cores from being twisted when they are frequently moved; the braided reinforcement layer is made of tinned copper wire It is woven with high-strength polyester silk, the weaving density is not less than 60%, and the overall strength reaches 20N/mm 2 , which protects the cable during stretching; the outer sheath is made of high-strength wear-resistant and oil-resistant chlorinated vinyl chloride Extrusion, the thickness is not less than 4 mm, to protect the internal structure of the cable.
本发明提供了一种思路及方法，具体实现该技术方案的方法和途径很多，以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围，本实施例中未明确的各组成部分均可用现有技术加以实现。The present invention provides a kind of train of thought and method, and there are many methods and approaches for realizing the technical solution, and the above description is only a preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without Under the premise of the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention, and each component that is not specified in this embodiment can be realized by existing technologies.
Claims (10)
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| CN201810436110.0A CN110473658A (en) | 2018-05-09 | 2018-05-09 | A kind of compound frequency conversion drum cable |
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