CN113567544A - 一种适用于角形件检查的涡流阵列探头 - Google Patents
一种适用于角形件检查的涡流阵列探头 Download PDFInfo
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Abstract
本发明涉及无损检测领域,具体涉及一种适用于角形件检查的涡流阵列探头。本装置探头可放置轴绕式激励线圈和密排点式接收线圈,两侧的轴绕式激励线圈和中间错位排布的密排点式接收线圈;轴绕式激励线圈的铜质漆包线的直径为0.3mm~1mm之间;密排点式接收线圈的铜质漆包线的直径为0.03mm~0.1mm之间。本探头可以良好的实现对于L型区域的竖直部分和水平部分的检查;通过轴绕式线圈与点式线圈的激励模式的切换,实现对于不同取向缺陷的有效检查。
Description
技术领域
本发明涉及无损检测领域,具体涉及一种适用于角形件检查的涡流阵列探头。
背景技术
核电系统核级或非核级异形的结构件表面或近表面检查过程中,一些核级和非核级的异形结构件,存在于承压和非承压位置。如典型区域的储存燃池和罐的钢覆面,其实为一层薄不锈钢板,称之为覆板,覆板之间通过焊接的方式拼接起来,覆盖了整个内壁。因乏燃料具有较高的放射性,如果覆板间拼接的焊缝存在质量问题,则一段时间后可能会出现放射性物质的渗漏,进而危害核电站的安全,故需要对覆板焊缝的质量进行检查。在众多的覆板焊缝结构中,有一种折板的L型焊缝。因此为了实现对于此种结构的结构件检查,需要开发适应型的检测探头。
发明内容
1、目的:
本专利中所设计阵列探头结构旨在解决在实际检查过程中针对类似于覆板折板L型对接焊缝的结构件根部区域的表面或近表面检查。
2、技术方案:
一种适用于角形件检查的涡流阵列探头,探头上包括轴绕式激励线圈和密排点式接收线圈,两侧的轴绕式激励线圈和中间错位排布的密排点式接收线圈;轴绕式激励线圈的铜质漆包线的直径为0.3mm~1mm之间;密排点式接收线圈的铜质漆包线的直径为0.03mm~0.1mm之间。
所述的轴绕式激励线圈和密排点式接收线圈间距为1.5倍~2倍密排点式接收线圈的直径;密排点式接收线圈错位的两排点间距为0.5倍密排点式接收线圈直径。
所述的探头整体为长方体,八个角均带有垫圈。
所述的探头两个垂直交接面,即探头检测正面和探头检测顶面上设有线圈放置槽,轴绕式激励线圈和密排点式接收线圈固定放置在线圈放置槽中。
所述的轴绕式激励线圈和密排点式接收线圈互相平行。
3、效果:
本发明的效果在于:本探头可以良好的实现对于L型区域的竖直部分和水平部分的检查;通过轴绕式线圈与点式线圈的激励模式的切换,实现对于不同取向缺陷的有效检查。
附图说明
图1阵列探头总体示意图
图2阵列探头总体主视图
图3阵列探头总体俯视图
图4探头检测实施示意图
图中:1、轴绕式激励线圈,2、探头检测正面,3、探头检测顶面,4、密排点式接收线圈。
具体实施方式
结合以上的图示,详细描述该探头的设计实施方式。
如图1所示,为探头的总体示意。在非导电导磁的硬质材料两个交接面上通过机加工方式加工轴绕式激励线圈1与密排点式接收线圈4的安装槽,上述线圈通过上胶固定于槽中。如图所示的线圈,在密排点式接收线圈4两侧分别布置两圈平行的轴绕式激励线圈1,密排点式接收线圈4中间错位排布,两种线圈均为铜质漆包线制作而成,轴绕式激励线圈1的铜质漆包线的直径为0.3mm~1mm之间。密排点式接收线圈4的铜质漆包线的直径为0.03mm~0.1mm之间。
如图2所示,为探头检测正面2的示意图。当探头工作于横向缺陷检查模式,此时轴绕式激励线圈1进行激励,如探头从左向右进行贴合试件的检查时,右侧轴绕式激励线圈1和密排点式接收线圈4作为一组开始组合工作,即轴绕式激励线圈1和密排点式接收线圈4同时检出;随着探头移动,左侧轴绕式激励线圈1和密排点式接收线圈4作为另一组开始工作。由于中间的密排点式接收线圈4是错位排布,因此可以在缺陷的检出率以及检测灵敏度上保证了互补和提高。
如图3所示,为探头检测顶面3的示意图。密排点式接收线圈4与轴绕式线圈间距为1.5倍~2倍的密排点式接收线圈4直径,错位的两排密排点式接收线圈4的间距为0.5倍密排点式接收线圈4直径。当探头工作于常规的分时激励分时接收的纵向缺陷检查时,则与常规的阵列探头工作原理一致。
如图4所示,为该类型探头的工作方式,将探头的探头检测正面2、探头检测顶面3两个布有线圈的检测面与L型折板试件接触,使线圈贴合检测面,按照扫查方向移动探头,使得探头经过焊缝区域,按照上述工作方式对焊缝实施检查。
该探头主要工作模式是当轴绕式激励线圈1作为激励时,与它同侧的的密排点式接收线圈4即作为接收线圈,此时主要用于平行交接面筋线方向的横向缺陷的检查;而当工作于常规的阵列探头的点式线圈激励和点式线圈接收的模式下,则主要用于垂直于交接面筋线方向的纵向缺陷的检查。
Claims (5)
1.一种适用于角形件检查的涡流阵列探头,其特征在于:探头上包括轴绕式激励线圈(1)和密排点式接收线圈(4),两侧的轴绕式激励线圈(1)和中间错位排布的密排点式接收线圈(4);轴绕式激励线圈(1)的铜质漆包线的直径为0.3mm~1mm之间;密排点式接收线圈(4)的铜质漆包线的直径为0.03mm~0.1mm之间。
2.根据权利要求1所述的一种适用于角形件检查的涡流阵列探头,其特征在于:所述的轴绕式激励线圈(1)和密排点式接收线圈(4)间距为1.5倍~2倍密排点式接收线圈(4)的直径;密排点式接收线圈(4)错位的两排点间距为0.5倍密排点式接收线圈(4)直径。
3.根据权利要求1所述的一种适用于角形件检查的涡流阵列探头,其特征在于:所述的探头整体为长方体,八个角均带有垫圈。
4.根据权利要求3所述的一种适用于角形件检查的涡流阵列探头,其特征在于:所述的探头两个垂直交接面,即探头检测正面(2)和探头检测顶面(3)上设有线圈放置槽,轴绕式激励线圈(1)和密排点式接收线圈(4)固定放置在线圈放置槽中。
5.根据权利要求1所述的一种适用于角形件检查的涡流阵列探头,其特征在于:所述的轴绕式激励线圈(1)和密排点式接收线圈(4)互相平行。
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