CN109541768A - 一种复合电缆 - Google Patents

一种复合电缆 Download PDF

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CN109541768A
CN109541768A CN201811410028.7A CN201811410028A CN109541768A CN 109541768 A CN109541768 A CN 109541768A CN 201811410028 A CN201811410028 A CN 201811410028A CN 109541768 A CN109541768 A CN 109541768A
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spring
backed quill
optical fiber
composite cable
elastic layer
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CN109541768B (zh
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陈浩
陈智
郑天顺
燕羽
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SHANGHAI YONGJIN CABLE (GROUP) CO Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401Optical cables
    • G02B6/4429Means specially adapted for strengthening or protecting the cables
    • G02B6/443Protective covering
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401Optical cables
    • G02B6/4429Means specially adapted for strengthening or protecting the cables
    • G02B6/4436Heat resistant
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/04Flexible cables, conductors, or cords, e.g. trailing cables
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1805Protections not provided for in groups H01B7/182 - H01B7/26
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/182Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments
    • H01B7/1825Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of a high tensile strength core
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/182Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments
    • H01B7/183Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of an outer sheath
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/184Sheaths comprising grooves, ribs or other projections
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1855Sheaths comprising helical wrapped non-metallic layers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1875Multi-layer sheaths
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29Protection against damage caused by extremes of temperature or by flame
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29Protection against damage caused by extremes of temperature or by flame
    • H01B7/295Protection against damage caused by extremes of temperature or by flame using material resistant to flame

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Communication Cables (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

本发明公开了一种复合电缆,涉及电缆领域,包括缆芯,缆芯上包裹设置有弹性层,弹性层周侧螺旋缠绕设置有光纤,弹性层上套设有弹性套管,弹性套管周侧包裹设置有绝缘层,绝缘层与弹性套管之间设置有多个导线。针对现有技术存在光纤易断裂的问题,本发明通过在弹性套管和绝缘层之间设置光纤,光纤可通过挤压弹性层或弹性套管,局部弯曲处受到的拉伸力,从而有效提高本发明的抗弯折性能。

Description

一种复合电缆
技术领域
本发明涉及电缆领域,更具体地说,它涉及一种复合电缆。
背景技术
复合电缆是一种同时含有光纤和导电线的缆线,使用时,可方便布线、减少资源浪费。
对于现有的复合电缆,如专利公开号为CN108475564A的中国专利,其公开了一种复合电缆,具有光纤单元,其由多个光纤心线构成;包覆导线;一对张力元件,其在与光纤单元的长度方向垂直的截面中,设置在相对于多个光纤单元互相对置的位置;外套,其以覆盖光纤单元以及张力元件的方式设置,在复合电缆的长度方向的任意的位置的、与复合电缆的长度方向垂直的截面中,包覆导线的中心位置位于由一对张力元件包围的区域内。
上述专利中,导线内导电金属比光纤的抗拉伸强度高,而铺设过程中,复合电缆难免会受到弯折,继而光纤局部拉力过大,光纤易断裂。
发明内容
针对现有技术存在光纤易断裂的问题,本发明的目的是提供一种复合电缆,通过将导线与光纤有效地融合,提高改善符合电缆的拉伸性能,避免内部光纤断裂。
为实现上述目的,本发明提供了如下技术方案:
一种复合电缆,包括缆芯,所述缆芯上包裹设置有弹性层,所述弹性层周侧螺旋缠绕设置有光纤,所述弹性层上套设有弹性套管,所述弹性套管周侧包裹设置有绝缘层,所述绝缘层与所述弹性套管之间设置有多个导线。
通过上述技术方案,本发明局部弯折后,光纤可通过向内压缩弹性层内或向外压缩弹性套管内,抵消光纤局部受到的拉伸力,待恢复伸直状态后,弹性层和弹性套管恢复形变,带动光纤恢复伸直状态,从而有效避免光纤受弯折断裂;本发明局部受弯折后,光纤可通过自动调节弯折部的缠绕螺距,抵消受到的弯折形变,从而避免光纤断裂,提高本发明的使用寿命。
进一步的,所述弹性层和所述弹性套管内均开设有多个气囊腔。
通过上述技术方案,开设气囊腔有效加强弹性层和弹性套管的形变幅度,从而增加光纤所能承受的弯曲幅度。
进一步的,所述气囊腔内填充有惰性气体。
通过上述技术方案,惰性气体不仅具有阻燃灭火的性能,使弹性层和弹性套管具有不可燃性,还能避免内部进入空气,从而减轻弹性层和弹性套管的老化。
进一步的,所述弹性层周侧一体设置有多个凸体,所述光纤螺旋缠绕设置于多个所述凸体之间,所述凸体远离所述弹性层的侧壁与所述弹性套管内部抵接。
通过上述技术方案,设置凸体,便于弹性层和弹性套管之间保持间隙,便于光纤自身实现一定的伸缩调整,适应自身受到的折弯。
进一步的,所述凸体侧壁开设有用于卡接所述光纤的卡槽。
通过上述技术方案,卡槽用于卡住光纤,固定光纤的螺旋状,避免光纤在弹性层周侧过于松弛。
进一步的,所述弹性套管侧壁螺旋开设有多个用于螺旋安置所述导线的安置槽。
通过上述技术方案,开设安置槽放置导线,既能提高导线安置后的稳定性;还能减小本发明的半径,提高结构的紧凑度。
进一步的,所述安置槽底部沿其延伸方向一体固定有多个弧形条。
通过上述技术方案,弧形条用于缓冲,减轻导线对弹性套管的挤压,从而保护光纤。
进一步的,多个所述导线周侧螺旋缠绕设置有防火带,所述防火带位于所述绝缘层和所述弹性套管之间。
通过上述技术方案,防火带用于提高本发明的防火性能。
进一步的,所述防火带两侧相互搭接形成凸起。
通过上述技术方案,防火带两侧搭接,提高防火带螺旋缠绕后的不平整度,从而提高防火带在绝缘层内的稳定性。
进一步的,所述防火带与所述绝缘层之间设置有金属屏蔽层。
通过上述技术方案,设置金属屏蔽层用于屏蔽外界信号,确保内部光纤信号的传递。
与现有技术相比,本发明的有益效果是:
(1)通过将光纤设置在弹性层与弹性套管之间,当光纤受局部弯折应力后,光纤挤压弹性层或弹性套管,避免其自身局部拉力过大,从而有效保护光纤,提高本发明的抗弯折性能;
(2)通过将光纤螺旋缠绕设置在弹性层周侧,若是光纤局部受弯折拉伸,光纤可通过改变弯折处以及其两侧的螺距,适应弯折幅度,从而防止光纤弯折断裂;
(3)进一步地,通过设置凸体,确保弹性层与弹性套管之间保持一定距离,便于光纤调节螺距,同时避免光纤在弹性层和弹性套管之间受挤压,影响其使用寿命;
(4)进一步地,通过开设气囊腔,并向气囊腔内填充惰性气体,不仅能够增加弹性层和弹性套管的形变幅度,进一步保护光纤,还能隔绝氧气,提高阻燃性,减缓氧化速度。
附图说明
图1是本发明的整体结构示意图;
图2是图1中A部局部放大图。
附图标记:1、弹性层;2、光纤;3、弹性套管;4、绝缘层;5、导线;6、气囊腔;7、惰性气体;8、凸体;9、卡槽;10、安置槽;11、弧形条;12、防火带;13、金属屏蔽层;14、缆芯。
具体实施方式
为了使本发明的目的、技术方案和有益效果更加清楚,下面结合实施例及附图对本发明作进一步的详细说明,但本发明的实施方式不仅限于此。
如图1所示,一种复合电缆,包括呈线状的缆芯14,缆芯14采用抗拉伸强度高的纤维制成,缆芯14上包裹有弹性层1,弹性层1周侧螺旋缠绕设置有光纤2,光纤2受拉力后改变其自身螺距实现轴向伸缩,抵消拉力,保护光纤2。弹性层1上套设有弹性套管3,弹性套管3周侧包裹有绝缘层4,绝缘层4作为皮面保护内部结构。弹性层1和弹性套管3均采用相同橡胶材质制成。使用时,若是光纤2受到拉力,向内压缩弹性层1或向外挤压弹性套管3,从而减轻其自身受到的拉力,避免光纤2断裂。
弹性层1和弹性套管3内均开设有多个气囊腔6,增强弹性层1和弹性套管3的弹性,便于弹性层1和弹性套管3发生较大的形变,从而抵消光纤2自身受到的拉力,进一步避免光纤2断裂。气囊腔6内填充有惰性气体7,惰性气体7可采用氮气,既能增强弹性套管3和弹性层1的阻燃性,还能减缓其自身老化。
如图1和图2所示,弹性套管3侧壁螺旋开设有多个安置槽10,安置槽10横截面呈圆弧状,安置槽10底部沿其延伸方向一体固定有多个弧形条11,安置槽10内螺旋安置有导线5,导线5包括金属芯和包裹金属芯的橡胶层,导线5侧壁与弧形条11抵接。使用时,若是导线5向内挤压弹性套管3,弧形条11先发生形变,减轻导线5对弹性套管3的挤压,从而保护光纤2,避免光纤2损坏。
弹性层1周侧一体固定有多个凸体8,凸体8呈半球状,凸体8侧壁开设有卡槽9,光纤2螺旋缠绕于多个凸体8之间,且卡入卡槽9内。通过将光纤2卡入卡槽9内,对光纤2完成弹性固定,凸体8远离弹性层1的侧壁与弹性套管3内壁抵接,使弹性层1与弹性套管3之间存在一定的缝隙,便于光纤2伸缩,提高光纤2抗折弯和抗拉伸性能。
多个导线5周侧螺旋缠绕有防火带12,防火带12采用无纺布制成,防火带12同时位于绝缘层4和弹性套管3之间,防火带12两侧相互搭接形成凸起,增加螺旋缠绕后的不平整度,从而提高其位于层与层之间的稳定性。防火带12与绝缘层4之间设置有金属屏蔽层13,用于屏蔽外界信号干扰,确保光纤2的内的信号传输。
综上所述:
本发明使用时,若是本发明局部弯折,由于光纤2螺旋缠绕设置在弹性层1周侧,光纤2可通过改变弯折处以及其两侧的螺距,适应弯折幅度,防止光纤2弯折断裂;又由于光纤2设置在弹性层1和弹性套管3之间,光纤2还可挤压弹性层1或弹性套管3,适用相应的弯曲,从而有效保护光纤2,提高本发明的抗弯折性能;通过设置凸体8,确保弹性层1与弹性套管3之间保持一定距离,便于光纤2调节螺距,同时避免光纤2在弹性层1和弹性套管3之间受挤压,影响其使用寿命;通过在弹性层1和弹性套管3内开设气囊腔6,并向气囊腔6内填充惰性气体7,不仅能够增加弹性层1和弹性套管3的形变幅度,进一步保护光纤2,还能隔绝氧气,提高阻燃性,减缓氧化速度。
以上所述仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例,凡属于本发明思路下的技术方案均属于本发明的保护范围。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前提下的若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。

Claims (10)

1.一种复合电缆,包括缆芯(14),其特征在于,所述缆芯(14)上包裹设置有弹性层(1),所述弹性层(1)周侧螺旋缠绕设置有光纤(2),所述弹性层(1)上套设有弹性套管(3),所述弹性套管(3)周侧包裹设置有绝缘层(4),所述绝缘层(4)与所述弹性套管(3)之间设置有多个导线(5)。
2.根据权利要求1所述的一种复合电缆,其特征在于,所述弹性层(1)和所述弹性套管(3)内均开设有多个气囊腔(6)。
3.根据权利要求2所述的一种复合电缆,其特征在于,所述气囊腔(6)内填充有惰性气体(7)。
4.根据权利要求1所述的一种复合电缆,其特征在于,所述弹性层(1)周侧一体设置有多个凸体(8),所述光纤(2)螺旋缠绕设置于多个所述凸体(8)之间,所述凸体(8)远离所述弹性层(1)的侧壁与所述弹性套管(3)内部抵接。
5.根据权利要求4所述的一种复合电缆,其特征在于,所述凸体(8)侧壁开设有用于卡接所述光纤(2)的卡槽(9)。
6.根据权利要求1所述的一种复合电缆,其特征在于,所述弹性套管(3)侧壁螺旋开设有多个用于螺旋安置所述导线(5)的安置槽(10)。
7.根据权利要求6所述的一种复合电缆,其特征在于,所述安置槽(10)底部沿其延伸方向一体固定有多个弧形条(11)。
8.根据权利要求1所述的一种复合电缆,其特征在于,多个所述导线(5)周侧螺旋缠绕设置有防火带(12),所述防火带(12)位于所述绝缘层(4)和所述弹性套管(3)之间。
9.根据权利要求8所述的一种复合电缆,其特征在于,所述防火带(12)两侧相互搭接形成凸起。
10.根据权利要求8所述的一种复合电缆,其特征在于,所述防火带(12)与所述绝缘层(4)之间设置有金属屏蔽层(13)。
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