CN205911090U - 一种35kV带多间隙防雷绝缘子 - Google Patents
一种35kV带多间隙防雷绝缘子 Download PDFInfo
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- CN205911090U CN205911090U CN201620970064.9U CN201620970064U CN205911090U CN 205911090 U CN205911090 U CN 205911090U CN 201620970064 U CN201620970064 U CN 201620970064U CN 205911090 U CN205911090 U CN 205911090U
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- electrode
- sparking electrode
- zinc oxide
- ceramic coat
- valve plate
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- 239000012212 insulator Substances 0.000 title claims abstract description 27
- 230000037250 Clearance Effects 0.000 title abstract 2
- 230000035512 clearance Effects 0.000 title abstract 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc monoxide Chemical compound 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[Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 60
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Abstract
本实用新型提供的一种35kV带多间隙防雷绝缘子，陶瓷外套内设有阀片腔和电极腔，阀片腔内设置有氧化锌阀片，电极腔内设置有放电电极，相邻两片放电电极之间的距离为10毫米至15毫米，陶瓷外套上开设有与电极腔相通的放电孔，陶瓷外套强度较高可直接支撑架空导线，保证线路的绝缘水平；氧化锌阀片的设置，避免了架空线路雷击断线和跳闸事故；放电电极、放电孔的设置，在雷击过电压时熄弧能力强，并且通流容量较普通的避雷器更大；相对于现有技术，无需将绝缘子和避雷器分开安装，日常运行维护费用低；放电孔的轴线垂直于电极腔的轴线，并且，放电孔的直径不小于放电电极的厚度，放电孔具有良好的放电性能，大大优化了防雷绝缘子的防雷性能。
Description
技术领域
[0001] 本实用新型涉及电网配件，尤其涉及一种35kV带多间隙防雷绝缘子。
背景技术
[0002] 35kV架空配电线路的雷电过电压幅值高，放电时间短，而35kV配电线路的绝缘水平低，雷电过电压能够使绝缘子发生闪络，在雷击闪络通道上形成工频续流造成线路故障。现有技术中，35kV架空线路防雷措施主要采用在线路绝缘子侧并联避雷器、招弧角或带空气间隙的防雷装置进行防雷，这种防雷方式造成现场安装结构复杂，改造难度较大，投入的人力、物力成本高。
发明内容
[0003] 本实用新型提供的一种35kV带多间隙防雷绝缘子，旨在克服现有技术中的绝缘子无防雷功能的不足。
[0004] 为了解决上述技术问题，本实用新型采用如下技术方案:一种35kV带多间隙防雷绝缘子，包括陶瓷外套，所述陶瓷外套内设有氧化锌阀片，所述陶瓷外套内还设有放电电极，所述陶瓷外套内设有固定氧化锌阀片的阀片腔和固定放电电极的电极腔，所述阀片腔与电极腔相通，并且，所述阀片腔与电极腔同轴，所述陶瓷外套上设有与电极腔相通的放电孔，所述放电孔的轴线垂直于所述电极腔的轴线，所述放电孔的直径不小于放电电极的厚度，相邻两片放电电极之间的距离为10毫米至15毫米，所述放电孔位于相邻两片放电电极之间，所述陶瓷外套包括与阀片腔相接的高压端和与电极腔相接的低压端，所述陶瓷外套的高压端上设有固定高压导线的高压法兰，所述陶瓷外套的低压端上设有与支撑件连接的低压法兰。
[0005] 一种可选的方案，所述氧化锌阀片和放电电极的横截面形状均为圆形，并且，所述氧化锌阀片的直径大于放电电极的直径。氧化锌阀片、放电电极便于制得，并且，氧化锌阀片、放电电极装配方便，降低了防雷绝缘子的使用成本。
[0006] —种可选的方案，相邻两片放电电极之间设有将相邻两片放电电极连接在一起的绝缘连接杆，所述放电电极与绝缘连接杆粘接在一起。绝缘连接杆的设置使得放电电极固定方便，简化了陶瓷外套的结构，降低了陶瓷外套的制造成本。并且，绝缘连接杆具有良好的定位性能，优化了放电电极的放电性能。
[0007] —种可选的方案，所述放电电极插接在电极腔内，并且，放电电极由低压法兰定位。放电电极定位可靠，简化了陶瓷外套的结构。
[0008] —种可选的方案，所述氧化锌阀片插接在阀片腔内，并且，氧化锌阀片由高压法兰定位。氧化锌阀片定位可靠，简化了陶瓷外套的结构。
[0009] —种可选的方案，所述高压法兰、低压法兰均与陶瓷外套为一体式结构，并且，高压法兰的直径等于低压法兰的直径。高压法兰、低压法兰与陶瓷外套连接可靠，并且，防雷绝缘子便于制得，降低了防雷绝缘子的使用成本。
[0010]与现有技术相比，本实用新型提供的一种35kV带多间隙防雷绝缘子，具有如下优点:陶瓷外套内设有阀片腔和电极腔，阀片腔内设置有氧化锌阀片，电极腔内设置有放电电极，相邻两片放电电极之间的距离为10毫米至15毫米，陶瓷外套上开设有与电极腔相通的放电孔，陶瓷外套强度较高可直接支撑架空导线，保证线路的绝缘水平;氧化锌阀片的设置，避免了架空线路雷击断线和跳闸事故;放电电极、放电孔的设置，在雷击过电压时熄弧能力强，并且通流容量较普通的避雷器更大;相对于现有技术，无需将绝缘子和避雷器分开安装，日常运行维护费用低；
[0011] 放电孔的轴线垂直于电极腔的轴线，并且，放电孔的直径不小于放电电极的厚度，放电孔具有良好的放电性能，大大优化了防雷绝缘子的防雷性能。
附图说明
[0012]附图1是本实用新型一种35kV带多间隙防雷绝缘子的剖视图。
具体实施方式
[0013]下面结合附图，对本实用新型的一种35kV带多间隙防雷绝缘子作进一步说明。如图1所示，一种35kV带多间隙防雷绝缘子，包括陶瓷外套I，所述陶瓷外套I内设有氧化锌阀片2，所述陶瓷外套I内还设有放电电极3，所述陶瓷外套I内设有固定氧化锌阀片2的阀片腔4和固定放电电极3的电极腔5，所述陶瓷外套I包括与阀片腔4相接的高压端和与电极腔5相接的低压端，所述陶瓷外套I的高压端上设有固定高压导线的高压法兰7，所述陶瓷外套I的低压端上设有与支撑件连接的低压法兰8，低压端通过低压法兰8固定在横担上，所述高压法兰7、低压法兰8均与陶瓷外套I为一体式结构，并且，高压法兰7的直径等于低压法兰8的直径，陶瓷外套I便于制得；
[0014]如图1所示，所述氧化锌阀片2和放电电极3的横截面形状均为圆形，并且，所述氧化锌阀片2的直径大于放电电极3的直径，所述阀片腔4与电极腔5相通，并且，所述阀片腔4与电极腔5同轴，所述氧化锌阀片2插接在阀片腔4内，并且，氧化锌阀片2由高压法兰7定位；
[0015]如图1所示，所述陶瓷外套I上设有与电极腔5相通的放电孔6，所述放电孔6的轴线垂直于所述电极腔5的轴线，所述放电孔6的直径不小于放电电极3的厚度，相邻两片放电电极3之间的距离为10毫米至15毫米，所述放电孔6位于相邻两片放电电极3之间，相邻两片放电电极3之间的距离越大，放电电极3的放电性能越好，相邻两片放电电极3之间的距离小于10毫米时，大大降低了放电电极3的放电性能，相邻两片放电电极3之间的距离大于15毫米时，增大了陶瓷外套I的尺寸，提高了防雷绝缘子的使用成本；
[0016]如图1所示，相邻两片放电电极3之间设有将相邻两片放电电极3连接在一起的绝缘连接杆9，所述放电电极3与绝缘连接杆9粘接在一起，多片放电电极3连接成一个整体，放电电极3便于装配，绝缘连接杆9可由陶瓷材料制得，所述放电电极3插接在电极腔5内，并且，放电电极3由低压法兰8定位。
[0017]氧化锌阀片2由金属氧化物制成，所述氧化锌阀片2采用符合DL/T815-2002《交流输电线路用复合外套金属氧化物避雷器》及GB11032-2000《交流无间隙金属氧化物避雷器》两个标准的材料制得，所述放电电极3由不锈钢材料制得。
[0018]上述技术方案的工作原理:陶瓷外套I内设有氧化锌阀片2和放电电极3，两邻两片放电电极3之间形成放电间隙，在雷电过电压作用下，氧化锌阀片2呈现低阻抗，将雷电电流泄放入地;雷电冲击过后，工频电压加载在氧化锌阀片2上，在交流过零点时，氧化锌阀片2的电阻瞬间变大，通过的电流即电弧电流被抑制在较低的数值上，此时，放电间隙的弧压增大，放电间隙的绝缘迅速恢复，电弧在极短时间内自然熄灭，工频续流被完全遮断，线路恢复正常运行。
[0019]以上仅为本实用新型的优选实施方式，旨在体现本实用新型的突出技术效果和优势，并非是对本实用新型的技术方案的限制。本领域技术人员应当了解的是，一切基于本实用新型技术内容所做出的修改、变化或者替代技术特征，皆应涵盖于本实用新型所附权利要求主张的技术范畴内。
Claims (6)
1.一种35kV带多间隙防雷绝缘子，包括陶瓷外套⑴，其特征在于:所述陶瓷外套(I)内设有氧化锌阀片⑵，所述陶瓷外套⑴内还设有放电电极⑶，所述陶瓷外套⑴内设有固定氧化锌阀片⑵的阀片腔⑷和固定放电电极⑶的电极腔⑶，所述阀片腔⑷与电极腔(5)相通，并且，所述阀片腔⑷与电极腔(5)同轴，所述陶瓷外套⑴上设有与电极腔(5)相通的放电孔(6)，所述放电孔(6)的轴线垂直于所述电极腔(5)的轴线，所述放电孔(6)的直径不小于放电电极(3)的厚度，相邻两片放电电极(3)之间的距离为10毫米至15毫米，所述放电孔(6)位于相邻两片放电电极⑶之间，所述陶瓷外套⑴包括与阀片腔⑷相接的高压端和与电极腔(5)相接的低压端，所述陶瓷外套(I)的高压端上设有固定高压导线的高压法兰⑵，所述陶瓷外套⑴的低压端上设有与支撑件连接的低压法兰⑶。
2.根据权利要求1所述的一种35kV带多间隙防雷绝缘子，其特征在于:所述氧化锌阀片(2)和放电电极⑶的横截面形状均为圆形，并且，所述氧化锌阀片⑵的直径大于放电电极(3)的直径。
3.根据权利要求1所述的一种35kV带多间隙防雷绝缘子，其特征在于:相邻两片放电电极⑶之间设有将相邻两片放电电极⑶连接在一起的绝缘连接杆(9)，所述放电电极⑶与绝缘连接杆(9)粘接在一起。
4.根据权利要求3所述的一种35kV带多间隙防雷绝缘子，其特征在于:所述放电电极⑶插接在电极腔⑶内，并且，放电电极⑶由低压法兰⑶定位。
5.根据权利要求1所述的一种35kV带多间隙防雷绝缘子，其特征在于:所述氧化锌阀片(2)插接在阀片腔⑷内，并且，氧化锌阀片⑵由高压法兰⑵定位。
6.根据权利要求1至5任意一项所述的一种35kV带多间隙防雷绝缘子，其特征在于:所述高压法兰⑵、低压法兰(8)均与陶瓷外套⑴为一体式结构，并且，高压法兰(7)的直径等于低压法兰(8)的直径。
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