CN112397222A - 海底光缆 - Google Patents
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Abstract
一种海底光缆,包括由内而外依次包覆设置的光纤组件、铠装层、内导体层、第一绝缘层、屏蔽层、外导体层及第二绝缘层,所述铠装层包括绞合导体,所述绞合导体绞合于所述光纤组件外,以所述绞合导体沿所述海底光缆径向的截面为第一截面,以所述内导体层沿所述海底光缆径向的截面为第二截面,以所述外导体层沿所述海底光缆径向的截面为第三截面,所述第一截面面积与所述第二截面面积之和等于所述第三截面面积。上述海底光缆能有效避免电腐蚀。
Description
技术领域
本发明涉及光电缆制造领域,尤其涉及一种海底光缆。
背景技术
在远距离多节点海底观测网系统中,使用海底光缆可实现分支单元与主节点之间的电能和信息回路传输。现有海底光缆包括内导体和外导体,内外导体均使用导体带纵包成型,因加工工艺限制,纵包用导体带厚度不超过1.0mm,在内外导体厚度相同的情况下,因内导体纵包后直径小于外导体纵包后直径,因此内导体截面小于外导体截面,内导体直流电阻大于外导体直流电阻,当内导体和外导体同时运行时,内导体和外导体中的电流不相等产生地中电流,从而导致海底光缆发生电腐蚀的问题。
发明内容
有鉴于此,有必要提供一种能有效避免电腐蚀的海底光缆。
本发明的一实施方式提供一种海底光缆,包括由内而外依次包覆设置的光纤组件、铠装层、内导体层、第一绝缘层、屏蔽层、外导体层及第二绝缘层,所述铠装层包括绞合导体,所述绞合导体绞合于所述光纤组件外,以所述绞合导体沿所述海底光缆径向的截面为第一截面,以所述内导体层沿所述海底光缆径向的截面为第二截面,以所述外导体层沿所述海底光缆径向的截面为第三截面,所述第一截面面积与所述第二截面面积之和等于所述第三截面面积。
进一步的,所述铠装层还包括加强件,所述加强件及绞合导体混合绞合于所述光纤组件外形成铠装结构。
进一步的,所述铠装结构层数为1~4层。
进一步的,所述铠装结构的间隙中填充有阻水材料。
进一步的,所述光纤组件包括光纤、阻水油膏及不锈钢管,所述光纤装设于所述不锈钢管内,所述阻水油膏填充于所述不锈钢管内。
进一步的,所述光纤芯数为1~192芯。
进一步的,所述外导体层与所述内导体层同轴设置。
进一步的,所述内导体层通过导体带材预变形焊接成管以包覆于所述铠装层外。
进一步的,所述外导体层通过导体无缝焊接成型的方式包覆于所述屏蔽层外。
进一步的,所述第一绝缘层及第二绝缘层由聚乙烯、聚丙烯、聚氯乙烯及乙丙橡胶中的一种或多种制成。
上述海底光缆中,所述铠装层包括加强件及绞合导体,所述加强件及导体混合绞合于所述光纤组件外形成铠装结构。所述第一截面面积与所述第二截面面积之和等于所述第三截面面积。从而使所述绞合导体与所述内导体层组成的导体与所述外导体层的直流电阻相同,进而消除因直流电阻不等造成的两极中的电流不相等,消除地中电流以避免电腐蚀。
附图说明
图1为本发明一实施例中的海底光缆的结构示意图。
主要元件符号说明
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
为了能够更清楚地理解本发明实施例的上述目的、特征和优点,下面结合附图和具体实施方式对本发明进行详细描述。需要说明的是,在不冲突的情况下,本申请的实施方式中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明实施例,所描述的实施方式是本发明一部分实施方式,而不是全部的实施方式。基于本发明中的实施方式,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式,都属于本发明实施例保护的范围。
除非另有定义,本文所使用的所有的技术和科学术语与属于本发明实施例的技术领域的技术人员通常理解的含义相同。在本发明的说明书中所使用的术语只是为了描述具体的实施方式的目的,不是旨在于限制本发明实施例。
请参阅图1,所述海底光缆100包括由内而外依次包覆设置的光纤组件10、铠装层20、内导体层30、第一绝缘层40、屏蔽层50、外导体层60及第二绝缘层70。
所述光纤组件10包括光纤11、阻水油膏12及不锈钢管13。所述光纤11装设于所述不锈钢管13内,所述光纤11芯数为1~192芯。所述阻水油膏12填充于所述不锈钢管13内,以提高所述光纤组件10的阻水性能。在一实施方式中,所述不锈钢管13通过不锈钢带无缝焊接而成。
所述铠装层20包括加强件21及绞合导体22,所述加强件21及绞合导体22混合绞合于所述光纤组件10外形成铠装结构。所述铠装结构层数为1~4层。所述铠装结构的缝隙中填充阻水材料,以提高所述海底光缆100的阻水能力。在一实施方式中,所述绞合导体22由铜、铝及其他等效材料中的一种或多种制成。所述加强件21由钢丝、非金属增强材料及其他等效材料中的一种或多种制成。
所述内导体层30通过导体带材预变形焊接成管以包覆于所述铠装层20外。所述第一绝缘层40挤包于所述内导体层30外。在一实施方式中,所述导体带材由铜、铝及其他等效材料中的一种或多种制成。所述第一绝缘层40由聚乙烯、聚丙烯、聚氯乙烯、乙丙橡胶及其他等效材料一种或多种制成。
在一实施方式中,所述屏蔽层50通过半导电挤塑料挤塑于所述第一绝缘层40外。在其他实施方式中,所述屏蔽层50通过半导电包带绕包或纵包于所述第一绝缘层40外。可以理解的,根据所述海底光缆100使用电压情况,可以适当调整所述屏蔽层50的结构。具体的,当所述海底光缆100在低压情况下使用时,可以去掉所述屏蔽层50。
所述外导体层60设置于所述屏蔽层50外,在一实施方式中,所述外导体层60与所述内导体层30同轴设置。所述外导体层60通过导体纵包的方式包覆于所述屏蔽层50外。在其他实施方式中,所述外导体层60通过导体无缝焊接成型的方式包覆于所述屏蔽层50外。以所述绞合导体22沿所述海底光缆100径向的截面为第一截面,以所述内导体层30沿所述海底光缆100径向的截面为第二截面,以所述外导体层60沿所述海底光缆100径向的截面为第三截面,所述第一截面面积与所述第二截面面积之和等于所述第三截面面积。从而使所述绞合导体22与所述内导体层30组成的导体与所述外导体层60的直流电阻相同,进而消除因直流电阻不等造成的电流不相等,消除地中电流以避免电腐蚀。
所述第二绝缘层70挤包于所述外导体层60外。在一实施方式中,所述第二绝缘层70由聚乙烯、聚丙烯、聚氯乙烯、乙丙橡胶或其他等效材料一种或多种制成。
上述海底光缆100中,所述铠装层20包括加强件21及绞合导体22,所述加强件21及绞合导体22混合绞合于所述光纤组件10外形成铠装结构。所述第一截面面积与所述第二截面面积之和等于所述第三截面面积。从而使所述绞合导体22与所述内导体层30组成的导体与所述外导体层60的直流电阻相同,进而消除因直流电阻不等造成的电流不相等,消除地中电流以避免电腐蚀。
以上实施方式仅用以说明本发明实施例的技术方案而非限制,尽管参照以上较佳实施方式对本发明实施例进行了详细说明,本领域的普通技术人员应当理解,可以对本发明实施例的技术方案进行修改或等同替换都不应脱离本发明实施例的技术方案的精神和范围。
Claims (10)
1.一种海底光缆,包括由内而外依次包覆设置的光纤组件、铠装层、内导体层、第一绝缘层、屏蔽层、外导体层及第二绝缘层,其特征在于:所述铠装层包括绞合导体,所述绞合导体绞合于所述光纤组件外,以所述绞合导体沿所述海底光缆径向的截面为第一截面,以所述内导体层沿所述海底光缆径向的截面为第二截面,以所述外导体层沿所述海底光缆径向的截面为第三截面,所述第一截面面积与所述第二截面面积之和等于所述第三截面面积。
2.根据权利要求1所述的海底光缆,其特征在于:所述铠装层还包括加强件,所述加强件及绞合导体混合绞合于所述光纤组件外形成铠装结构。
3.根据权利要求2所述的海底光缆,其特征在于:所述铠装结构层数为1~4层。
4.根据权利要求3所述的海底光缆,其特征在于:所述铠装结构的间隙中填充有阻水材料。
5.根据权利要求1所述的海底光缆,其特征在于:所述光纤组件包括光纤、阻水油膏及不锈钢管,所述光纤装设于所述不锈钢管内,所述阻水油膏填充于所述不锈钢管内。
6.根据权利要求5所述的海底光缆,其特征在于:所述光纤芯数为1~192芯。
7.根据权利要求1所述的海底光缆,其特征在于:所述外导体层与所述内导体层同轴设置。
8.根据权利要求7所述的海底光缆,其特征在于:所述内导体层通过导体带材预变形焊接成管以包覆于所述铠装层外。
9.根据权利要求7所述的海底光缆,其特征在于:所述外导体层通过导体无缝焊接成型的方式包覆于所述屏蔽层外。
10.根据权利要求1所述的海底光缆,其特征在于:所述第一绝缘层及第二绝缘层由聚乙烯、聚丙烯、聚氯乙烯及乙丙橡胶中的一种或多种制成。
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