CN110718319A - 发射器用点火电缆 - Google Patents
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Abstract
本发明公开了一种发射器用点火电缆,包括由绝缘线芯相绞合形成的缆芯,缆芯外绕包有电缆防火层,电缆防火层外包裹有由镀镍铜导体编织而成的屏蔽层,屏蔽层外包覆有高抗撕陶瓷硅橡胶护套;电缆防火层包括绕包于缆芯外的聚酰亚胺薄膜包带层a,聚酰亚胺薄膜包带层a外编织有玻璃纤维编织层,玻璃纤维编织层与聚酰亚胺薄膜包带层a之间设有绕包于聚酰亚胺薄膜包带层外的双面云母包带层,玻璃纤维编织层外绕包有单面云母包带层,单面云母包带层外绕包有聚酰亚胺薄膜包带层b;本发明耐燃、耐潮、耐腐蚀、耐高温和耐电磁干扰,传输损耗低,绝缘性能高、承载电流能力强,适应坏境恶劣,直流耐压可达20kV高绝缘性,能够达到50dB以上屏蔽效能。
Description
技术领域
本发明涉及一种发射器用点火电缆,属于电线电缆技术领域。
背景技术
近年来,随着航空航天技术卫星通信技术的提高,需要不断的通过火箭发射将通信卫星送上指定的轨道。由于发射技术的不断提高。对发射用点火电缆的要求也越来越高,发射系统点火环境的要求,火箭设计方对点火电缆耐火温度的要求,从原来的45秒内1000℃提高到了45秒1400~1800℃之间,另外要求外径更小,比老产品小了5%,重量更轻,比老产品轻了15%,电缆更柔软,柔软度比老产品提高30%,普通的点火电缆已满足不了要求,因此,我们提出一种发射器用点火电缆。
发明内容
本发明的主要目的在于提供一种发射器用点火电缆,耐燃、耐潮、耐腐蚀、耐高温和耐电磁干扰,传输损耗低,绝缘性能高、承载电流能力强,适应坏境恶劣,直流耐压可达20kV高绝缘性,能够达到50dB以上屏蔽效能,尤其是能有效应用于火箭点火装置恶劣区域,外径更小,重量更轻、电缆柔软性更好满足新型火箭发射点火要求的高强度、耐高温的特点,可以有效解决背景技术中的问题。
为实现上述目的,本发明采取的技术方案为:
一种发射器用点火电缆,包括由绝缘线芯相绞合形成的缆芯,所述缆芯外绕包有电缆防火层,所述电缆防火层外包裹有由镀镍铜导体编织而成的屏蔽层,所述屏蔽层外包覆有高抗撕陶瓷硅橡胶护套;
所述电缆防火层包括绕包于缆芯外的聚酰亚胺薄膜包带层a,所述聚酰亚胺薄膜包带层a外编织有玻璃纤维编织层,所述玻璃纤维编织层与聚酰亚胺薄膜包带层a之间设有绕包于聚酰亚胺薄膜包带层外的双面云母包带层,玻璃纤维编织层外绕包有单面云母包带层,所述单面云母包带层外绕包有聚酰亚胺薄膜包带层b。
进一步的,所述绝缘线芯包括由镀银铜金属丝绞合构成的导体,所述导体的外部挤包有一层可溶性的聚四氟乙烯树脂绝缘层。
进一步的,所述高抗撕陶瓷硅橡胶护套的组成成分按重量份数包括:硅橡胶40-50份,丁晴橡胶50-60份,乙炔炭黑10-20份,膨胀蛭石1-5份,氧化锆1-2份,膨润土5-10份,石英粉5-20份,甲基硅油10-15份,硬脂酸锌0.5-1份,乙烯基三乙氧基硅烷1-3份,硫化剂2-3份、硫磺5-10份,阻燃剂5-10份,防火剂5-10份。
进一步的,所述高抗撕陶瓷硅橡胶护套的组成成分按重量份数包括:硅橡胶50份,丁晴橡胶56份,乙炔炭黑18,膨胀蛭石5份,氧化锆1份,膨润土8份,石英粉18份,甲基硅油10份,硬脂酸锌0.8份,乙烯基三乙氧基硅烷3份,硫化剂3份、硫磺6份,阻燃剂10份,防火剂8份。
进一步的,所述的硅橡胶为甲基乙烯基硅橡胶。
进一步的,所述的硫化剂为双铂金硫化剂。
进一步的,所述阻燃剂为十溴二苯乙烷,八溴醚和十溴二苯醚中的任意一种或多种联合。
进一步的,所述防火剂为钨酸钠,三氧化二锑,四溴邻苯二酸酐,六溴苯、十溴联苯,十氯联苯中的任意一种或多种联合。
与已有技术相比,本发明有益效果体现在:
1、结构设计新颖,通过电缆防火层:聚酰亚胺薄膜包带层a+双面云母包带层+玻璃纤维编织层+单面云母包带层+聚酰亚胺薄膜包带层b组合防火层结构的设计,使电缆实验能经受汽油喷灯1400℃~1800℃燃烧试验2分钟,撤去火焰后30s内自然熄灭,提高了耐火性能,此外,还具有柔软、强度高、耐冲击等特点。
2、结构简单,重量轻、体积小、柔性好,具备更小的弯曲半径,容易在狭窄空间内安装。
3、耐燃、耐潮、耐腐蚀、耐高温和耐电磁干扰,传输损耗低,绝缘性能高、承载电流能力强,适应坏境恶劣,直流耐压可达20kV高绝缘性,能够达到50dB以上屏蔽效能,尤其是能有效应用于火箭点火装置恶劣区域。
4、高抗撕陶瓷硅橡胶机械性能高,乙炔炭黑添加少量即可提高硅橡胶的机械强度,膨胀蛭石、石英粉与防火剂的配合,能保证硅橡胶的耐热性能和阻燃效果,本发明的硅橡胶具有高导热率、耐热性高优点,具有良好的导热性,阻燃性,耐火性。
附图说明
图1为本发明的整体结构示意图。
图中:1、聚四氟乙烯树脂绝缘层;2、导体;3、聚酰亚胺薄膜包带层a;4、缆芯;5、双面云母包带层;6、玻璃纤维编织层;7、单面云母包带层;8、聚酰亚胺薄膜包带层b;9、屏蔽层;10、高抗撕陶瓷硅橡胶护套。
具体实施方式
为使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解,下面结合具体实施方式,进一步阐述本发明。
如图1所示,本实施例提供一种发射器用点火电缆,包括由绝缘线芯相绞合形成的缆芯,所述缆芯外绕包有电缆防火层,所述电缆防火层外包裹有由镀镍铜导体编织而成的屏蔽层,所述屏蔽层外包覆有高抗撕陶瓷硅橡胶护套;
所述电缆防火层包括绕包于缆芯外的聚酰亚胺薄膜包带层a,所述聚酰亚胺薄膜包带层a外编织有玻璃纤维编织层,所述玻璃纤维编织层与聚酰亚胺薄膜包带层a之间设有绕包于聚酰亚胺薄膜包带层外的双面云母包带层,玻璃纤维编织层外绕包有单面云母包带层,所述单面云母包带层外绕包有聚酰亚胺薄膜包带层b。
进一步的,所述绝缘线芯包括由镀银铜金属丝绞合构成的导体,所述导体的外部挤包有一层可溶性的聚四氟乙烯树脂绝缘层。
进一步的,所述高抗撕陶瓷硅橡胶护套的组成成分按重量份数包括:硅橡胶40-50份,丁晴橡胶50-60份,乙炔炭黑10-20份,膨胀蛭石1-5份,氧化锆1-2份,膨润土5-10份,石英粉5-20份,甲基硅油10-15份,硬脂酸锌0.5-1份,乙烯基三乙氧基硅烷1-3份,硫化剂2-3份、硫磺5-10份,阻燃剂5-10份,防火剂5-10份。
进一步的,所述高抗撕陶瓷硅橡胶护套的组成成分按重量份数包括:硅橡胶50份,丁晴橡胶56份,乙炔炭黑18,膨胀蛭石5份,氧化锆1份,膨润土8份,石英粉18份,甲基硅油10份,硬脂酸锌0.8份,乙烯基三乙氧基硅烷3份,硫化剂3份、硫磺6份,阻燃剂10份,防火剂8份。
进一步的,所述的硅橡胶为甲基乙烯基硅橡胶。
进一步的,所述的硫化剂为双铂金硫化剂。
进一步的,所述阻燃剂为十溴二苯乙烷,八溴醚和十溴二苯醚中的任意一种或多种联合。
进一步的,所述防火剂为钨酸钠,三氧化二锑,四溴邻苯二酸酐,六溴苯、十溴联苯,十氯联苯中的任意一种或多种联合。
本发明还提供一种发射器用点火电缆的制备过程如下:
1)束丝机绞合镀银铜金属丝规格为19/0.32,银层厚度1.2μm,绞合外径1.63mm,绞合节距26的导体;
2)采用高温挤出机在导体上紧密挤出可溶性聚四氟乙烯形成绝缘线芯,模芯10mm,模套15mm,标称外径为2.25±0.05mm;
3)笼绞机将绝缘线芯成缆绞合,绞合节距180mm,绞合外径15.0±1.0mm;
4)在所述的缆芯上绕包聚酰亚胺薄膜包带层a,包带规格50u×45右向搭盖率为30%,外径15.16mm;
5)在所述的聚酰亚胺薄膜包带层a上绕包双面云母包带层,包带层的宽度45mm,右向搭盖率为30%,外径15.32±0.3mm;
6)在所述的双面云母包带层绕包层上,用36锭编织机,编织玻璃纤维编织层,编织密度≥85%,编织外径15.45±0.3mm;
7)在所述的玻璃纤维编织层上绕包聚酰亚胺薄膜包带层b,包带宽度45mm,右向搭盖率为30%,外径15.5±0.3mm;
8)在所述的聚酰亚胺薄膜包带层b上,用36锭编织机,由镀镍铜丝编织成屏蔽层,编织密度≥85%,编织外径15.8±0.3mm;
9)采用常温挤出机在屏蔽层外挤出抗撕陶瓷硅橡胶护套,模芯16mm,模套20mm,标称外径为20.5±0.5mm,制得的电缆型号规格为:CGW-KF46PGXJR31×1.5。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。
Claims (8)
1.一种发射器用点火电缆,其特征在于:包括由绝缘线芯相绞合形成的缆芯,所述缆芯外绕包有电缆防火层,所述电缆防火层外包裹有由镀镍铜导体编织而成的屏蔽层,所述屏蔽层外包覆有高抗撕陶瓷硅橡胶护套;
所述电缆防火层包括绕包于缆芯外的聚酰亚胺薄膜包带层a,所述聚酰亚胺薄膜包带层a外编织有玻璃纤维编织层,所述玻璃纤维编织层与聚酰亚胺薄膜包带层a之间设有绕包于聚酰亚胺薄膜包带层外的双面云母包带层,玻璃纤维编织层外绕包有单面云母包带层,所述单面云母包带层外绕包有聚酰亚胺薄膜包带层b。
2.根据权利要求1所述的一种发射器用点火电缆,其特征在于:所述绝缘线芯包括由镀银铜金属丝绞合构成的导体,所述导体的外部挤包有一层可溶性的聚四氟乙烯树脂绝缘层。
3.根据权利要求1所述的一种发射器用点火电缆,其特征在于,所述高抗撕陶瓷硅橡胶护套的组成成分按重量份数包括:硅橡胶40-50份,丁晴橡胶50-60份,乙炔炭黑10-20份,膨胀蛭石1-5份,氧化锆1-2份,膨润土5-10份,石英粉5-20份,甲基硅油10-15份,硬脂酸锌0.5-1份,乙烯基三乙氧基硅烷1-3份,硫化剂2-3份、硫磺5-10份,阻燃剂5-10份,防火剂5-10份。
4.根据权利要求3所述的一种发射器用点火电缆,其特征在于,所述高抗撕陶瓷硅橡胶护套的组成成分按重量份数包括:硅橡胶50份,丁晴橡胶56份,乙炔炭黑18,膨胀蛭石5份,氧化锆1份,膨润土8份,石英粉18份,甲基硅油10份,硬脂酸锌0.8份,乙烯基三乙氧基硅烷3份,硫化剂3份、硫磺6份,阻燃剂10份,防火剂8份。
5.根据权利要求4所述的一种发射器用点火电缆,其特征在于:所述的硅橡胶为甲基乙烯基硅橡胶。
6.根据权利要求4所述的一种发射器用点火电缆,其特征在于:所述的硫化剂为双铂金硫化剂。
7.根据权利要求4所述的一种发射器用点火电缆,其特征在于:所述阻燃剂为十溴二苯乙烷,八溴醚和十溴二苯醚中的任意一种或多种联合。
8.根据权利要求4所述的一种发射器用点火电缆,其特征在于:所述防火剂为钨酸钠,三氧化二锑,四溴邻苯二酸酐,六溴苯、十溴联苯,十氯联苯中的任意一种或多种联合。
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