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Present Situation of Wire Rope NDT Technology
Release time:
2023-01-12
With the continuous development of society, the wire rope is also in constant development, that wire rope nondestructive testing technology is what, the current situation is how.
Present Situation of Wire Rope NDT Technology
With the continuous development of society, the wire rope is also in constant development,NDT for wire ropeWhat is the technology and what is the current situation? The following is a brief introduction to you.
Problems of (I) Local Fault Detection Method
The defects detected by local fault detection method include local deformation, broken wire and so on, which belong to short scale defects. The difficulty of the local fault detection method is the identification of broken wires of the wire rope, which uses the method of measuring the peak value of the magnetic flux.
From the nature of the wire rope, wire rope nondestructive testing to a single broken wire leakage of the magnetic flux depends on the distribution of broken wire location, the length of the wire section, wire diameter, force, wire rope twisting structure and many other factors. If the detected broken wire is on the outer surface and the amount is small, it is easier to judge.
However, if there are other situations of broken wires, it is more difficult to detect, for example, the broken wires in different sections are too close to each other, there are several broken wires in the same section, the diameter of steel wire is too small, and the distribution of broken wires in the section is chaotic. The above situation makes the leakage magnetic flux detected by the instrument does not change deterministically with the number of broken wires, which brings a large measurement error to the determination of broken wires. Therefore, there is a certain error in the local fault detection method, which makes it difficult to distinguish broken wires.
Problems of (II) metal section loss measurement method
Metal section loss measurement method is based on the Hall principle, the use of integral detection coil to detect. This detection method can test the short change of the metal cross-sectional area by detecting the probe. For the flexible part of the steel wire rope, the overall strength of the steel wire rope is the local weak part of the short length.
The main problem of metal section loss measurement method is the problem of quantitative detection resolution, how to improve the resolution of the detection probe needs to be carefully studied. When using the metal section loss measurement method for quantitative detection, first select the wire rope to be detected, which is basically the same as the initial state, and then compare the measurement results of other parts with the reference value. The difference between the two is the measured value. Therefore, the selection of the reference value is the key to the accuracy of the wire rope's NDT results and is also the center of the problem. The main problems are: it is difficult to determine the consistency between the state and the initial state of the wire rope that has been used for a long time.
The wire rope nondestructive flaw detector is widely used, which can detect the static and non-moving wire rope, and can also detect the movement of the wire rope. That is, it is suitable for regular local flaw detection of the consumable and vulnerable parts of the wire rope in service, and also suitable for regular and irregular inspection of the wire rope.
The content of the article comes from the wire rope non-destructive testing://m.priceaide.com/
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