The utility model discloses a high-temperature resistant and flame-retardant plug-in head type transformer sleeve, which comprises an intermediate conducting pole, an insulator is arranged on the outer wall of the intermediate conducting pole, the insulator is made of glass fiber yarn impregnated with epoxy resin layer by layer, and a plurality of capacitance screens are arranged between glass fiber yarn impregnated with epoxy resin to form a multi-layer shield, and a grounding lead-out structure is connected on the outermost capacitance screen A coaxial cylindrical electric field is formed between the middle conducting rod and each layer of capacitance screen, and the insulator is wound and solidified. The coaxial cylindrical electric field structure of the utility model is favorable for the uniform distribution of electric field and reduces the local discharge of the sleeve; the insulator made of glass fiber yarn impregnated with epoxy resin has the advantages of high flame retardancy, dense internal structure and high mechanical strength. In the manufacturing process, casting mould is not needed, and the production cycle is short, which is convenient for mass production.
【技术实现步骤摘要】
一种耐高温阻燃的插拔头式变压器套管
:本技术涉及一种耐高温阻燃的插拔头式变压器套管。
技术介绍
:常规40.5kV及以下电压等级变压器用插拔式套管为环氧树脂浇注式套管;结构为中间导电杆、设有接地屏,两者之间用环氧树脂浇注绝缘,由于尺寸小,且为环氧浇注式,无法实现在接地屏和中间导电杆中间增加电容屏来均匀电场。纯环氧树脂浇注绝缘内部易产生微裂纹且脆性高、阻燃性差;在接地屏处电场集中,套管局部放电概率高;发生故障时易燃烧炸裂。
技术实现思路
:本技术的目的是提供一种低局放、阻燃式、机械强度高的40.5kV及以下电压等级的耐高温阻燃的插拔头式变压器套管。本技术所采用的技术方案有:一种耐高温阻燃的插拔头式变压器套管,包括中间导电杆,在中间导电杆的外壁上设置绝缘体,所述绝缘体由玻纤纱浸渍环氧树脂逐层缠绕而成,并在玻纤纱浸渍环氧树脂间布置若干电容屏并形成多层屏蔽,在最外层的电容屏上连接接地引出结构,中间导电杆与各层电容屏之间组成同轴圆柱形电场,绝缘体缠绕后固化成型。进一步地,所述电容屏布置2-10层。进一步地,所述电容屏采用金属或半导电复合材料。本技术具有如下有益效果:本技术中的同轴圆柱形电场结构利于电场均匀分布,降低了套管的局部放电量;以玻璃纤维纱浸渍环氧树脂制成的绝缘体具有高阻燃性,内部组织致密,高机械强度的优点。在制造过程中不需要浇注模具,生产周期短便于批量生产。附图说明:图1为本技术结构示意图。图中1-中间导电杆;2-电容屏;3-绝缘体;4-接地引出结构。具体实施方式:下面结合附图对本技术作进一步的说明。如图1,本技术一种耐高温阻燃的插拔头式变压器套管,包括中间导电 ...
【技术保护点】
1.一种耐高温阻燃的插拔头式变压器套管,其特征在于:包括中间导电杆(1),在中间导电杆(1)的外壁上设置绝缘体(3),所述绝缘体(3)由玻纤纱浸渍环氧树脂逐层缠绕而成,并在玻纤纱浸渍环氧树脂间布置若干电容屏(2)并形成多层屏蔽,在最外层的电容屏(2)上连接接地引出结构(4),中间导电杆(1)与各层电容屏(2)之间组成同轴圆柱形电场,绝缘体(3)缠绕后固化成型。
【技术特征摘要】
1.一种耐高温阻燃的插拔头式变压器套管,其特征在于:包括中间导电杆(1),在中间导电杆(1)的外壁上设置绝缘体(3),所述绝缘体(3)由玻纤纱浸渍环氧树脂逐层缠绕而成,并在玻纤纱浸渍环氧树脂间布置若干电容屏(2)并形成多层屏蔽,在最外层的电容屏(2)上连接接地引出结构(4),中间导电...
【专利技术属性】
技术研发人员:虞育号,
申请(专利权)人:江苏智达高压电气有限公司,
类型:新型
国别省市:江苏,32
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