CN113658751A - 一种散热型中压耐火电缆及其制备方法 - Google Patents
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Abstract
本发明公开了一种散热型中压耐火电缆及其制备方法,包括金属导体,金属导体外设有导体屏蔽层,且导体屏蔽层外设有绝缘层,绝缘层外设有绝缘屏蔽层,且绝缘屏蔽层外设有金属屏蔽层,金属导体、导体屏蔽层、绝缘层、绝缘屏蔽层和金属屏蔽层共同构成电缆线芯,金属屏蔽层一侧设有铍铜合金波纹管,且电缆线芯与铍铜合金波纹管构成电缆缆芯。该装置结构简单,设计新颖,此电缆结构不仅使电缆具有优异的耐火性能,由铍铜合金波纹管加冷却介质的结构又使电缆具有良好的散热性能,可有效提高电缆载流量,增加电缆使用效率,延长电缆寿命等优点。
Description
技术领域
本发明涉及电缆技术领域,具体为一种散热型中压耐火电缆及其制备方法。
背景技术
耐火电缆是指在火焰燃烧情况下能够保持一定时间安全运行的电缆,常用于高层建筑、地下铁道、地下街、大型电站及重要的工矿企业等与防火安全和消防救生有关的地方。
而为达到中压电缆耐火要求,耐火层和隔氧层设计较厚,材料热阻系数大,产品外径偏大,不利于电缆热量散发。电缆导体通过电流,由于导体电阻的存在,导体不断发热,若电缆长时间处于高温状态下工作会加速电缆绝缘老化,影响电缆使用寿命,现公开的相关散热电缆的结构复杂且工艺上不易实现。因此我们对此做出改进,提出一种散热型中压耐火电缆及其制备方法。
发明内容
为了解决上述技术问题,本发明提供了如下的技术方案:
本发明一种散热型中压耐火电缆及其制备方法,包括金属导体,所述金属导体外设有导体屏蔽层,且导体屏蔽层外设有绝缘层,所述绝缘层外设有绝缘屏蔽层,且绝缘屏蔽层外设有金属屏蔽层,所述金属导体、导体屏蔽层、绝缘层、绝缘屏蔽层和金属屏蔽层共同构成电缆线芯,所述金属屏蔽层一侧设有铍铜合金波纹管,且电缆线芯与铍铜合金波纹管构成电缆缆芯,所述电缆缆芯外依次设有陶瓷化防火耐火复合带、高氧指数聚烯烃隔氧层、陶瓷化防火耐火复合带层、陶瓷化聚烯烃耐火层和无卤低烟阻燃聚烯烃护套层。
作为本发明的一种优选技术方案,所述导体屏蔽层、绝缘层、绝缘屏蔽层和金属屏蔽层和依次层层包裹在金属导体的表面构成电缆线芯,且电缆缆芯由三根线芯和三根铍铜合金波纹管相切成缆组成。
作为本发明的一种优选技术方案,所述陶瓷化防火耐火复合带绕包安装在电缆缆芯外扎紧固定连接,所述高氧指数聚烯烃隔氧层固定绕包安装在陶瓷化防火耐火复合带的外壁,所述陶瓷化防火耐火复合带绕包固定安装在高氧指数聚烯烃隔氧层的外壁,所述陶瓷化聚烯烃耐火层固定绕包安装在陶瓷化防火耐火复合带的外壁,所述无卤低烟阻燃聚烯烃护套层固定绕包安装在陶瓷化聚烯烃耐火层的外壁。
作为本发明的一种优选技术方案,所述铍铜合金波纹管设有波峰外径、壁厚、波距、波高和波厚数值。
作为本发明的一种优选技术方案,所述铍铜合金波纹管材料采用铍铜合金,化学元素成分按质量分数计,如下:
(1)Be 1.95;
(2)Ni 0.35;
(3)Si 0.15;
(4)Fe 0.15;
(5)Al 0.15;
(6)Pb 0.005;
(7)Cu 余量。
作为本发明的一种优选技术方案,所述其制备方法为:选取按重量份计的氧化铍11.87份、铜135.64份、钴2.04份、镍1.18份和钛0.49份,在准备以前生产产生的炉渣12份;然后在电弧炉依次铺设一层铜原料,一层氧化铍,一层钴、镍、钛混合层料,一层氧化铍和一层铜原料,依次向上反复多次铺设,最后在顶层铜原料表面覆盖一层炉渣;通电真空熔化,炉内温度1900℃,熔化完后停电搅拌,冷却到975℃时,扒出合金中的碳化铍、碳、残留粉末等浮渣,然后在950℃时出炉浇铸成锭块。
作为本发明的一种优选技术方案,所述铍铜合金锭块经过表面铣削、加热、热轧、水淬、铣面、冷轧、脱脂、固溶热处理、酸洗、钝化后制成铍铜合金板带材,铍铜合金板带材晶粒度为30μm,晶粒不均匀度1级,铍铜合金板带材经成型、纵向焊接、轧纹制成铍铜合金波纹管。
作为本发明的一种优选技术方案,所述波纹管尺寸为:
波纹管波峰外径D:电缆线芯外径的0.48倍;
波纹管壁厚δ:
D≥10mm,δ=0.2mm;
D≥20mm,δ=0.25mm;
D≥30mm,δ=0.3mm;
D≥40mm,δ=0.4mm;
D≥60mm,δ=0.45mm;
波纹管波距q:q=0.1×D mm。
作为本发明的一种优选技术方案,所述波纹管波高h:
D≥10mm,h=2.0mm;
D≥20mm,h=4.0mm;
D≥30mm,h=5.0mm;
D≥40mm,h=6.0mm;
D≥60mm,h=10.0mm;
波纹管波厚a:a=q/2+0.2 mm。
本发明的有益效果是:该种散热型中压耐火电缆及其制备方法,此散热中压电缆结构生产工艺易于实现,用铍铜合金波纹管来代替常规填充可使电缆结构更加稳定,电缆不易变形,铍铜合金波纹管具有较高的弹性和塑性,耐腐蚀性能好,疲劳强度高,弹性稳定系数小,可承受最大4MPa耐压力,波纹管工作温度-60℃~280℃,满足电缆正常运行及短路运行温度,绕包用陶瓷化防火耐火复合带在火灾环境下(600℃~3000℃),迅速被烧成陶瓷状坚硬的完整壳体,燃烧时间越长,温度越高,壳体越坚硬,坚硬的壳体铠装对线路起到很好的保护作用,隔氧层用材料填充大量的氢氧化铝及氢氧化镁,发生火灾时遇高温开始分解,释放出水分蒸发吸收热量,降低温度,生成的氧化物和燃烧形成的炭化物结合形成坚硬的壳体,耐火层用材料在火焰灼烧或者高温条件下可生成坚硬的陶瓷状硬壳,硬壳不熔融、不滴落,可抗水喷淋和机械震动,且具有非常好的隔热隔火效果,外护套用材料拥有良好的阻燃耐火特性,火灾条件下也不会产生有毒气体,且pH值、重金属含量、烟密度及透光率等技术指标均优于相关国家标准要求,此电缆结构不仅使电缆具有优异的耐火性能,由铍铜合金波纹管加冷却介质的结构又使电缆具有良好的散热性能,可有效提高电缆载流量,增加电缆使用效率,延长电缆寿命等优点。
附图说明
图1是本发明一种散热型中压耐火电缆及其制备方法的电缆端面结构示意图;
图2是本发明一种散热型中压耐火电缆及其制备方法的波纹管结构示意图。
图中:1、金属导体;2、导体屏蔽层;3、绝缘层;4、绝缘屏蔽层;5、金属屏蔽层;6、铍铜合金波纹管;7、陶瓷化防火耐火复合带层;8、高氧指数聚烯烃隔氧层;9、陶瓷化防火耐火复合带层;10、陶瓷化聚烯烃耐火层;11、无卤低烟阻燃聚烯烃护套层;12、波峰外径;13、壁厚;14、波距;15、波高;16、波厚。
具体实施方式
以下结合附图对本发明的优选实施例进行说明,应当理解,此处所描述的优选实施例仅用于说明和解释本发明,并不用于限定本发明。
实施例:如图1-2所示,本发明一种散热型中压耐火电缆及其制备方法,包括金属导体1,金属导体1外设有导体屏蔽层2,且导体屏蔽层2外设有绝缘层3,绝缘层3外设有绝缘屏蔽层4,且绝缘屏蔽层5外设有金属屏蔽层5,金属导体1、导体屏蔽层2、绝缘层3、绝缘屏蔽层4和金属屏蔽层5共同构成电缆线芯,金属屏蔽层5一侧设有铍铜合金波纹管6,且电缆线芯与铍铜合金波纹管6构成电缆缆芯,电缆缆芯外依次设有陶瓷化防火耐火复合带7、高氧指数聚烯烃隔氧层8、陶瓷化防火耐火复合带层9、陶瓷化聚烯烃耐火层10和无卤低烟阻燃聚烯烃护套层11。
其中,导体屏蔽层2、绝缘层3、绝缘屏蔽层4和金属屏蔽层5和依次层层包裹在金属导体1的表面构成电缆线芯,且电缆缆芯由三根线芯和三根铍铜合金波纹管6相切成缆组成。
其中,陶瓷化防火耐火复合带7绕包安装在电缆缆芯外扎紧固定连接,高氧指数聚烯烃隔氧层8固定绕包安装在陶瓷化防火耐火复合带7的外壁,陶瓷化防火耐火复合带9绕包固定安装在高氧指数聚烯烃隔氧层8的外壁,陶瓷化聚烯烃耐火层10固定绕包安装在陶瓷化防火耐火复合带9的外壁,无卤低烟阻燃聚烯烃护套层11固定绕包安装在陶瓷化聚烯烃耐火层10的外壁。
其中,铍铜合金波纹管6设有波峰外径12、壁厚13、波距14、波高15和波厚16数值。
其中,铍铜合金波纹管6材料采用铍铜合金,化学元素成分按质量分数计,如下:
(1)Be 1.95;
(2)Ni 0.35;
(3)Si 0.15;
(4)Fe 0.15;
(5)Al 0.15;
(6)Pb 0.005;
(7)Cu 余量。
其中,其制备方法为:选取按重量份计的氧化铍11.87份、铜135.64份、钴2.04份、镍1.18份和钛0.49份,在准备以前生产产生的炉渣12份;然后在电弧炉依次铺设一层铜原料,一层氧化铍,一层钴、镍、钛混合层料,一层氧化铍和一层铜原料,依次向上反复多次铺设,最后在顶层铜原料表面覆盖一层炉渣;通电真空熔化,炉内温度1900℃,熔化完后停电搅拌,冷却到975℃时,扒出合金中的碳化铍、碳、残留粉末等浮渣,然后在950℃时出炉浇铸成锭块。
其中,铍铜合金锭块经过表面铣削、加热、热轧、水淬、铣面、冷轧、脱脂、固溶热处理、酸洗、钝化后制成铍铜合金板带材,铍铜合金板带材晶粒度为30μm,晶粒不均匀度1级,铍铜合金板带材经成型、纵向焊接、轧纹制成铍铜合金波纹管。
其中,波纹管尺寸为:
波纹管波峰外径D:电缆线芯外径的0.48倍;
波纹管壁厚δ:
D≥10mm,δ=0.2mm;
D≥20mm,δ=0.25mm;
D≥30mm,δ=0.3mm;
D≥40mm,δ=0.4mm;
D≥60mm,δ=0.45mm;
波纹管波距q:q=0.1×D mm。
其中,波纹管波高h:
D≥10mm,h=2.0mm;
D≥20mm,h=4.0mm;
D≥30mm,h=5.0mm;
D≥40mm,h=6.0mm;
D≥60mm,h=10.0mm;
波纹管波厚a:a=q/2+0.2 mm。
此电缆结构不仅使电缆具有优异的耐火性能,由铍铜合金波纹管加冷却介质的结构又使电缆具有良好的散热性能,可有效提高电缆载流量,增加电缆使用效率,延长电缆寿命等优点。
最后应说明的是:在本发明的描述中,需要说明的是,术语“竖直”、“上”、“下”、“水平”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。
在本发明的描述中,还需要说明的是,除非另有明确的规定和限定,术语“设置”、“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本发明中的具体含义。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (9)
1.一种散热型中压耐火电缆,包括金属导体(1),其特征在于,所述金属导体(1)外设有导体屏蔽层(2),且导体屏蔽层(2)外设有绝缘层(3),所述绝缘层(3)外设有绝缘屏蔽层(4),且绝缘屏蔽层(5)外设有金属屏蔽层(5),所述金属导体(1)、导体屏蔽层(2)、绝缘层(3)、绝缘屏蔽层(4)和金属屏蔽层(5)共同构成电缆线芯,所述金属屏蔽层(5)一侧设有铍铜合金波纹管(6),且电缆线芯与铍铜合金波纹管(6)构成电缆缆芯,所述电缆缆芯外依次设有陶瓷化防火耐火复合带(7)、高氧指数聚烯烃隔氧层(8)、陶瓷化防火耐火复合带层(9)、陶瓷化聚烯烃耐火层(10)和无卤低烟阻燃聚烯烃护套层(11)。
2.根据权利要求1所述的一种散热型中压耐火电缆,其特征在于,所述导体屏蔽层(2)、绝缘层(3)、绝缘屏蔽层(4)和金属屏蔽层(5)和依次层层包裹在金属导体(1)的表面构成电缆线芯,且电缆缆芯由三根线芯和三根铍铜合金波纹管(6)相切成缆组成。
3.根据权利要求1所述的一种散热型中压耐火电缆,其特征在于,所述陶瓷化防火耐火复合带(7)绕包安装在电缆缆芯外扎紧固定连接,所述高氧指数聚烯烃隔氧层(8)固定绕包安装在陶瓷化防火耐火复合带(7)的外壁,所述陶瓷化防火耐火复合带(9)绕包固定安装在高氧指数聚烯烃隔氧层(8)的外壁,所述陶瓷化聚烯烃耐火层(10)固定绕包安装在陶瓷化防火耐火复合带(9)的外壁,所述无卤低烟阻燃聚烯烃护套层(11)固定绕包安装在陶瓷化聚烯烃耐火层(10)的外壁。
4.根据权利要求1所述的一种散热型中压耐火电缆及其制备方法,其特征在于,所述铍铜合金波纹管(6)设有波峰外径(12)、壁厚(13)、波距(14)、波高(15)和波厚(16)数值。
5.一种散热型中压耐火电缆及其制备方法,基如权利要求1-4任意一项所述的一种散热型中压耐火电缆,其特征在于,所述铍铜合金波纹管(6)材料采用铍铜合金,化学元素成分按质量分数计,如下:
(1)Be 1.95;
(2)Ni 0.35;
(3)Si 0.15;
(4)Fe 0.15;
(5)Al 0.15;
(6)Pb 0.005;
(7)Cu 余量。
6.根据权利要求5所述的一种散热型中压耐火电缆及其制备方法,其特征在于,所述其制备方法为:选取按重量份计的氧化铍11.87份、铜135.64份、钴2.04份、镍1.18份和钛0.49份,在准备以前生产产生的炉渣12份;然后在电弧炉依次铺设一层铜原料,一层氧化铍,一层钴、镍、钛混合层料,一层氧化铍和一层铜原料,依次向上反复多次铺设,最后在顶层铜原料表面覆盖一层炉渣;通电真空熔化,炉内温度1900℃,熔化完后停电搅拌,冷却到975℃时,扒出合金中的碳化铍、碳、残留粉末等浮渣,然后在950℃时出炉浇铸成锭块。
7.根据权利要求5所述的一种散热型中压耐火电缆及其制备方法,其特征在于,所述铍铜合金锭块经过表面铣削、加热、热轧、水淬、铣面、冷轧、脱脂、固溶热处理、酸洗、钝化后制成铍铜合金板带材,铍铜合金板带材晶粒度为30μm,晶粒不均匀度1级,铍铜合金板带材经成型、纵向焊接、轧纹制成铍铜合金波纹管。
8.根据权利要求5所述的一种散热型中压耐火电缆及其制备方法,其特征在于,所述波纹管尺寸为:
波纹管波峰外径D:电缆线芯外径的0.48倍;
波纹管壁厚δ:
D≥10mm,δ=0.2mm;
D≥20mm,δ=0.25mm;
D≥30mm,δ=0.3mm;
D≥40mm,δ=0.4mm;
D≥60mm,δ=0.45mm;
波纹管波距q:q=0.1×D mm。
9.根据权利要求5所述的一种散热型中压耐火电缆及其制备方法,其特征在于,所述波纹管波高h:
D≥10mm,h=2.0mm;
D≥20mm,h=4.0mm;
D≥30mm,h=5.0mm;
D≥40mm,h=6.0mm;
D≥60mm,h=10.0mm;
波纹管波厚a:a=q/2+0.2 mm。
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