CN109401408A - 一种电力设备用电磁屏蔽结构及其制造方法 - Google Patents
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Abstract
一种电力设备用电磁屏蔽结构,所述电力设备用电磁屏蔽结构包括壳体,所述壳体内部覆盖有屏蔽内层,所述壳体外部涂覆有屏蔽外层,壳体内部覆盖的屏蔽内层材料为丁烷基橡胶基质吸波材料,所述丁烷基橡胶基质吸波材料包含硫化丁烷基橡胶、羟基铁粉及纳米石墨;所述壳体外部涂覆的屏蔽外层材料为吸波涂料,所述吸波涂料为聚氨酯导电涂料,所述聚氨酯导电涂料包括分散剂、聚氨酯树脂以及纳米石墨。本发明提供了一种电力设备用电磁屏蔽结构及其制造方法,可以有效屏蔽电磁干扰及污染,可以应用于各种非金属箱体,也可以增强金属箱体的防腐性能及电磁屏蔽性能,可以应用在各种对电磁屏蔽要求高的场合。
Description
技术领域
本发明涉及一种电力设备用电磁屏蔽材料及其制备方法,属于电力设备技术领域。
背景技术
现在人类已经进入了电子信息化时代,各种高集成和高功率无线通信系统和电子器件数量急剧增加,导致电磁干扰和电磁污染问题日益突出,不仅在通信领域中对信号的产生、传播和接收造成了极大的影响,而且给人类社会的生产与生活来了不容忽视的危害,联合国人类环境会议早在1969年就将电磁污染列为继大气污染、水污染、噪声污染之后的全球“第四大环境污染”。因此,对于带电的电力设备,如变电所、高压电及配电盘,对于电磁屏蔽均有很高的要求,以前的电力设备箱体一般为金属制造,通常金属板会对入射电磁波产生吸收损耗、界面反射损耗和板中内部反射损耗达到屏蔽作用。但随着技术进步以及电力设备在社会生活中的普及,在一些特殊应用场合,非金属箱体的电力设备应用越高越广泛,因此,迫切需要一种高效、轻质的电磁材料以满足工作需求,而且能够满足防腐、成本低廉的市场需求。
发明内容
本发明的目的在于:提供一种电力设备用电磁屏蔽结构及其制造方法,可以有效屏蔽电磁干扰及污染,可以应用于各种非金属箱体,也可以增强金属箱体的防腐性能及电磁屏蔽性能,可以应用在各种对电磁屏蔽要求高的场合。
为实现以上目的,本发明采用的技术方案为: 一种电力设备用电磁屏蔽结构,所述电力设备用电磁屏蔽结构包括壳体,所述壳体内部覆盖有屏蔽内层,所述壳体外部涂覆有屏蔽外层,壳体内部覆盖的屏蔽内层材料为丁烷基橡胶基质吸波材料,所述丁烷基橡胶基质吸波材料包含硫化丁烷基橡胶、羟基铁粉及纳米石墨;所述壳体外部涂覆的屏蔽外层材料为吸波涂料,所述吸波涂料为聚氨酯导电涂料,所述聚氨酯导电涂料包括分散剂、聚氨酯树脂以及纳米石墨;进一步的,所述丁烷基橡胶基质吸波材料包括取丁烷基橡胶30-50份、活性氧化锌2-4份、四甲基硫脲0.5-2份、吸波粉15-40份;所述吸波粉包括0.5-2份羟基铁以及8-12份纳米石墨;所述聚氨酯导电涂料包括聚乙二醇0.5-1份、聚氨酯树脂20-30份、纳米石墨60-70份、丁酮60-80份。
本发明还提供了一种电力设备用电磁屏蔽结构的制造方法,包括以下步骤:
步骤1:取丁烷基橡胶、活性氧化锌以及四甲基硫脲,于行星研磨机中研磨30分钟,取研磨所得混合物溶于二甲苯中制得橡胶基体溶液;
步骤2:取羟基铁粉与纳米石墨于混料机中混合30分钟制得吸波粉;
步骤3:取步骤1所得橡胶基体溶液加入二甲苯及步骤2所得的吸波粉,混合均匀制得混合液;
步骤4:将步骤3所得的混合液采用旋涂法在模具中制备胚膜,旋涂旋转速度为800r/min,旋涂时间为20s,制得薄膜厚度为0.5mm-2mm的胚膜;
步骤5:将步骤4制得胚膜在25℃-65℃下静置10-50分钟;
步骤6:将步骤5所得胚膜置于100℃-150℃下进行固化得到丁烷基橡胶基质吸波材料膜;
步骤7:按传统工艺制作电力设备的壳体,将步骤6制得的丁烷基橡胶基质吸波材料膜使用粘合剂粘接在制造好的壳体内侧,粘贴有丁烷基橡胶基质吸波材料膜构成壳体内部的屏蔽内层;
步骤9:将聚乙二醇,聚氨酯树脂,纳米石墨,丁酮混合,在高速球磨混合机内混合20分钟,混合后过600目筛网,得聚氨酯导电涂料;
步骤10:将步骤9所得聚氨酯导电涂料喷涂于步骤7制成的壳体外侧构成屏蔽外层。
本发明的积极有益技术效果在于:通过在壳体内部设置屏蔽内层,壳体外部设置屏蔽外层,采用双层屏蔽结构,增强了屏蔽效果,可以用于多种非金属材料壳体上,并且屏蔽内层采用丁烷基橡胶基质吸波材料,可以与各种材质良好结合,并且具有强度高,在相对拉伸为20%的情况下,强度极限为32kg/cm;屏蔽外层采用聚氨酯导电涂料,具有防腐能力强,并且可以进行无气喷涂,对环境友好。
具体实施例
为了更充分的解释本发明的实施,提供本发明的实施实例,这些实施实例仅仅是对本发明的阐述,不限制本发明的范围。
实施例中对比例采用1.1×0.6×0.3m的ABS壳体,壳体不做任何喷涂处理。
实施例1:
实施例1的电力设备用电磁屏蔽材料的制备方法:
步骤1:取丁烷基橡胶40份,活性氧化锌3份,四甲基硫脲1份,于行星研磨机中研磨30分钟,取研磨所得混合物1份溶于5份二甲苯中制得橡胶基体溶液;
步骤2:取羟基铁粉1份与10份纳米石墨于混料机中混合30分钟制得吸波粉;
步骤3:取步骤1所得橡胶基体溶液50份加入70份二甲苯及40份步骤2所得的吸波粉,混合均匀制得混合液,调节粘度为15Pa·s;
步骤4:将步骤3所得的混合液采用旋涂法在模具中制备胚膜,旋涂旋转速度为800r/min,旋涂时间为20s,制得薄膜厚度为2mm的胚膜;
步骤5:将步骤4制得胚膜在50℃下静置40分钟;
步骤6:将步骤5所得胚膜置于120℃下进行固化得到丁烷基橡胶基质吸波材料膜;
步骤7:使用镀锌板钣金制得1.1×0.6×0.3m的金属壳体,将步骤6制得的丁烷基橡胶基质吸波材料膜使用粘合剂粘接在制造好的壳体内侧,粘贴有丁烷基橡胶基质吸波材料膜构成壳体内部的屏蔽内层;
步骤9:将聚乙二醇1份,聚氨酯树脂30份,纳米石墨70份,丁酮80份的原料混合,在高速球磨混合机内混合20分钟,混合后过600目筛网,得聚氨酯导电涂料;
步骤10:将步骤9所得聚氨酯导电涂料喷涂于步骤7制成的壳体外侧构成屏蔽外层。
实施例2:
步骤1:取丁烷基橡胶50份,活性氧化锌3份,四甲基硫脲1份,于行星研磨机中研磨30分钟,取研磨所得混合物1份溶于5份二甲苯中制得橡胶基体溶液;
步骤2:取羟基铁粉1.2份与9份纳米石墨于混料机中混合30分钟制得吸波粉;
步骤3:取步骤1所得橡胶基体溶液50份加入70份二甲苯及40份步骤2所得的吸波粉,混合均匀制得混合液;调节粘度为15Pa·s;
步骤4:将步骤3所得的混合液采用旋涂法在模具中制备胚膜,旋涂旋转速度为800r/min,旋涂时间为20s,制得薄膜厚度为2mm的胚膜;
步骤5:将步骤4制得胚膜在60℃下静置50分钟;
步骤6:将步骤5所得胚膜置于135℃下进行固化得到丁烷基橡胶基质吸波材料膜;
步骤7:采用ABS塑料制得1.1m×0.6m×0.3m的塑料壳体,将步骤6制得的丁烷基橡胶基质吸波材料膜使用粘合剂粘接在制造好的壳体内侧,粘贴有丁烷基橡胶基质吸波材料膜构成壳体内部的屏蔽内层;
步骤9:将聚乙二醇0.5份,聚氨酯树脂20份,纳米石墨60份,丁酮60份的原料混合,在高速球磨混合机内混合20分钟,混合后过600目筛网,得聚氨酯导电涂料;
步骤10:将步骤9所得聚氨酯导电涂料喷涂于步骤7制成的壳体外侧构成屏蔽外层。
以上实施例及对比例的电磁屏蔽测试结果:
上述测试采用GB12190-90的方法进行测试
本发明通过在壳体内部设置屏蔽内层,壳体外部设置屏蔽外层,采用双层屏蔽结构,增强了屏蔽效果,并且屏蔽内层采用丁烷基橡胶基质吸波材料,可以与各种材质良好结合,可应用在各种采用塑料作为外壳的需要电磁屏蔽的电力设备上,并且具有强度高,在相对拉伸为20%的情况下,强度极限为32kg/cm;屏蔽外层采用聚氨酯导电涂料,具有防腐能力强,并且可以进行无气喷涂,对环境友好。
在详细说明本发明的实施方式之后,熟悉该项技术的人士可清楚地了解,在不脱离上述申请专利范围与精神下可进行各种变化与修改,凡依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均属于本发明技术方案的范围,且本发明亦不受限于说明书中所举实例的实施方式。
Claims (3)
1.一种电力设备用电磁屏蔽结构,其特征在于:所述电力设备用电磁屏蔽结构包括壳体,所述壳体内部覆盖有屏蔽内层,所述壳体外部涂覆有屏蔽外层,壳体内部覆盖的屏蔽内层材料为丁烷基橡胶基质吸波材料,所述丁烷基橡胶基质吸波材料包含硫化丁烷基橡胶、羟基铁粉及纳米石墨;所述壳体外部涂覆的屏蔽外层材料为吸波涂料,所述吸波涂料为聚氨酯导电涂料,所述聚氨酯导电涂料包括分散剂、聚氨酯树脂以及纳米石墨。
2.根据权利要求1所述的一种电力设备用电磁屏蔽结构,其特征在于:所述丁烷基橡胶基质吸波材料包括取丁烷基橡胶30-50份、活性氧化锌2-4份、四甲基硫脲0.5-2份、吸波粉15-40份;所述吸波粉包括0.5-2份羟基铁以及8-12份纳米石墨;所述聚氨酯导电涂料包括聚乙二醇0.5-1份、聚氨酯树脂20-30份、纳米石墨60-70份、丁酮60-80份;所述吸波涂料包括聚乙二醇0.5-1份、聚氨酯树脂20-30份、纳米石墨60-70份、丁酮60-80份。
3.一种权利要求1所述的一种电力设备用电磁屏蔽结构的制造方法:其特征在于:包括以下步骤:
步骤1:取丁烷基橡胶、活性氧化锌以及四甲基硫脲,于行星研磨机中研磨30分钟,取研磨所得混合物溶于二甲苯中制得橡胶基体溶液;
步骤2:取羟基铁粉与纳米石墨于混料机中混合30分钟制得吸波粉;
步骤3:取步骤1所得橡胶基体溶液加入二甲苯及步骤2所得的吸波粉,混合均匀制得混合液;
步骤4:将步骤3所得的混合液采用旋涂法在模具中制备胚膜,旋涂旋转速度为800r/min,旋涂时间为20s,制得薄膜厚度为0.5mm-2mm的胚膜;
步骤5:将步骤4制得胚膜在25℃-65℃下静置10-50分钟;
步骤6:将步骤5所得胚膜置于100℃-150℃下进行固化得到丁烷基橡胶基质吸波材料膜;
步骤7:按传统工艺制作电力设备的壳体,将步骤6制得的丁烷基橡胶基质吸波材料膜使用粘合剂粘接在制造好的壳体内侧,粘贴有丁烷基橡胶基质吸波材料膜构成壳体内部的屏蔽内层;
步骤9:将聚乙二醇,聚氨酯树脂,纳米石墨,丁酮混合,在高速球磨混合机内混合20分钟,混合后过600目筛网,得聚氨酯导电涂料;
步骤10:将步骤9所得聚氨酯导电涂料喷涂于步骤7制成的壳体外侧构成屏蔽外层。
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CN1927926A (zh) * | 2006-09-27 | 2007-03-14 | 上海电缆研究所 | 一种导电橡胶及其应用 |
CN102020899A (zh) * | 2010-11-26 | 2011-04-20 | 中国人民解放军第三军医大学 | 复合涂层电磁屏蔽涂料及其制备的复合涂层电磁屏蔽材料 |
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CN1927926A (zh) * | 2006-09-27 | 2007-03-14 | 上海电缆研究所 | 一种导电橡胶及其应用 |
CN102020899A (zh) * | 2010-11-26 | 2011-04-20 | 中国人民解放军第三军医大学 | 复合涂层电磁屏蔽涂料及其制备的复合涂层电磁屏蔽材料 |
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