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A method for judging the nature of defects in small-diameter pipe detection aided by simulation

A technology for small-diameter tubes and defects, which is applied in the field of using simulation to assist small-diameter tubes to detect and judge the nature of defects. It can solve the problems of different appearance and theoretical appearance, identify weld defect types, etc., and achieve the effect of reducing the accuracy and sensitivity requirements.

Active Publication Date: 2021-02-19
JIANGSU FRONTIER ELECTRIC TECH +2
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  • Description
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  • Application Information

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Problems solved by technology

[0003] However, at present, technicians mostly use phased array ultrasonic testing technology to detect the location of weld defects. The structure of the detection waveform is similar, and the shape presented by various factors is different from the theoretical shape. It is difficult for technicians to quickly identify the welding defect from the detection waveform Seam defect types and defect characteristics

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  • A method for judging the nature of defects in small-diameter pipe detection aided by simulation
  • A method for judging the nature of defects in small-diameter pipe detection aided by simulation
  • A method for judging the nature of defects in small-diameter pipe detection aided by simulation

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Embodiment Construction

[0052] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0053] combine figure 1 , figure 2 , the present invention proposes a method for judging the nature of defects in small-diameter pipe detection aided by simulation, the method comprising:

[0054] Step 1, make typical defect test blocks: make 3 butt weld workpieces of small-diameter pipes with specifications of 57x11, and pre-embed 2 typical weld defects in each butt weld, including: unfused side wall and incomplete penetration of root , centerline cracks, weld toe cracks, dense pores, heat-affected zone cracks.

[0055] Step 2, select the detection probe: the frequency of the probe is 7.5Mhz, the number of array elements is 16 chips, the arrangement of the array elements is linear array, the radian of the chip is 75mm, and the probe is installed on the wedge with an angle of 39 degrees, the wed...

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Abstract

The invention discloses a method for judging the nature of defects in small-diameter pipe detection aided by simulation. The ultrasonic non-destructive testing simulation software is used to model the detection settings of small-diameter pipe welds, and the detection results of various types of potential defects in small-diameter pipe butt welds are analyzed. Simulation calculation, comparing the calculation results with the actual detection results of the corresponding types of defects, summarizing the characteristics, and obtaining the characteristic map of the echo of this type of defect, this characteristic map can be used as a reference in the analysis process of the phased array detection results of small-diameter pipe welds guide map.

Description

technical field [0001] The invention relates to the technical field of ultrasonic non-destructive testing, in particular to a method for judging the nature of defects in small-diameter tube detection aided by simulation. Background technique [0002] The use of phased array ultrasonic testing technology to detect various key components or welding parts has become the most commonly used method in nondestructive testing today. When using a phased array probe to detect a weld, it is not necessary to frequently move back and forth, back and forth, left and right, on both sides of the weld like a common single probe, and the phased array probe scans in a straight line parallel to the weld along the length of the weld. Full volume inspection of welded joints. This scanning method can be completed by means of a mechanical scanner equipped with an array probe sliding along a precisely positioned track, and it can also be completed manually, which can achieve rapid detection and hig...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/44G01N29/06
CPCG01N29/069G01N29/4445G01N29/4472G01N2291/0289
Inventor 刘叙笔马君鹏杨贤彪岳贤强李永杨超杨庆旭孙雄万瑜赵占辉陈金玉彭宏伟
Owner JIANGSU FRONTIER ELECTRIC TECH