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首页> 外文期刊>The tube & pipe journal >DETECTING SEAMS in WELDED TUBES
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DETECTING SEAMS in WELDED TUBES

机译：在焊接管中检测密封

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摘要

The magnetic leaking flux method for detecting weld seams relies on two magnetizing coils to generate a constant electric current, or magnetic flux, which is transmitted through a yoke (see Figure 1). The flux enters the tube wall via the pole cap at one side and leaves the wall by entering the opposite pole cap. This arrangement is similar to electrical current passing through resistors in a parallel circuit. One branch of the circuit is the path taken by the primary flux, and the other branch is the path taken by the secondary flux. In addition to obeying the rules of a parallel circuit, magnetic flux also follows another rule of electrical cur-rent: It travels through the path of least resistance.
机译：用于检测焊缝的漏磁通方法依靠两个磁化线圈来产生恒定的电流或磁通量，该电流或磁通量通过磁轭传输（见图1）。助焊剂在一侧通过极帽进入管壁，并通过进入相对的极帽离开管壁。这种布置类似于通过并联电路中的电阻器的电流。电路的一个分支是初级磁通所采取的路径，另一分支是次级磁通所采取的路径。除了遵守并联电路的规则外，磁通量还遵循另一条电流规则：它通过最小电阻的路径传播。

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