Pout detection method and device for steel pipe weld seam

A detection method and detection device technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of low accuracy of the measurement results of the pout and the deviation of the measurement base surface, and achieve the purpose of solving the deviation of the measurement base surface and improving the accuracy Effect

Active Publication Date: 2017-06-13
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the certain curvature of the steel pipe surface, the measurement base plane is deflected when the dial gauge is used to measure the weld pout, which leads to low accuracy of the measurement results of the pout

Method used

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  • Pout detection method and device for steel pipe weld seam
  • Pout detection method and device for steel pipe weld seam
  • Pout detection method and device for steel pipe weld seam

Examples

Experimental program
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Embodiment 1

[0050] Such as figure 1As shown, the present embodiment provides a method for detecting the pout of a steel pipe weld, including:

[0051] Step 101, acquiring the weld seam of the steel pipe to be detected and the contour data of both sides of the weld seam.

[0052] In this embodiment, the profile data in step 101 may be obtained by a laser sensor such as a laser two-dimensional scanning sensor, or may be obtained by other methods, which will not be described here.

[0053] Step 102, calculating a standard distance value according to the radius and offset distance of the steel pipe.

[0054] In this embodiment, both the radius and the offset distance in step 102 are preset. Wherein, the radius of the steel pipe in step 102 is the standard circle radius of the steel pipe.

[0055] In this embodiment, step 102 may calculate the standard distance value in the following manner, or other methods may be used to calculate the standard distance value, which is not limited here.

...

Embodiment 2

[0067] Such as image 3 As shown, the pout detection method of the steel pipe weld seam that the embodiment of the present invention provides, this method and figure 1 Similar as shown, except that it also includes:

[0068] Step 104, obtaining the average pout value of the weld according to the left groove pout value and the right groove pout value.

[0069] In this embodiment, the average pout value in step 104 may be the average value of the left-groove pout value and the right-groove pout value.

[0070] In this embodiment, after the average pout value is obtained through step 104, it can be determined whether the weld pout is inside or outside according to the relationship between the average pout value and the standard distance value. The calculation of the average pout value can be more accurate than the calculation of the pout of the steel pipe weld by the pout value of the groove on one side alone.

[0071] The invention has the following beneficial effects: the po...

Embodiment 3

[0073] Such as Figure 4 As shown, the pout detection method of the steel pipe weld seam that the embodiment of the present invention provides, this method and figure 1 Similar as shown, except that it also includes:

[0074] Step 105, within a preset distance interval, update the offset distance.

[0075] In this embodiment, the preset distance interval in step 105 can be optional. Preferably, it may be 50 to 100 mm.

[0076] In this embodiment, after the offset distance is updated, step 102 and step 103 can be executed again to obtain the left groove pout value and the right groove pout value corresponding to the updated offset distance. The above process can be repeated only once; in order to improve the accuracy of the measurement results, the process of updating the offset distance and calculating the left and right bevel pout values ​​can also be repeated for a preset number of times.

[0077] In step 106, the final beak value of the steel pipe weld is obtained accor...

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Abstract

The invention discloses a steel pipe welding gap angular distortion detection method and device and relates to a surface measuring technology. The method and device aims at solving the problem in the prior art of low accuracy of a measuring result of the angular distortion. The method includes: S10 acquiring a welding gap of a steel pipe to be detected and outline data of two sides of the welding gap; S20 calculating a standard distance value according to the preset radius of the steel pipe and the preset offset distance; S30 acquiring a left groove angular distortion value and a right groove angular distortion value of a welding gap according to the outline data and the standard distance value. The method and device can be applied to a steel pipe welding gap detection system.

Description

technical field [0001] The invention relates to surface measurement technology, in particular to a pout detection method and device for steel pipe welds. Background technique [0002] The pout of the weld, also known as peach-shaped tip, slub effect, etc., is a common geometric defect in the manufacture of welded steel pipes for pipelines. With the quality requirements of high-pressure transmission pipelines at home and abroad, the pouting problem of welded seams has been paid more and more attention to by welded steel pipe manufacturers and owners. [0003] In the prior art, a dial indicator is usually used to measure the pout of the weld seam. The dial indicator is widely used in weld inspection due to its multi-function, small and light features, and is suitable for the inspection of flat butt welds. [0004] However, since the surface of the steel pipe has a certain radian, the measurement base plane is deflected when the dial gauge is used to measure the pout of the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/30
Inventor 张骅王亚彬刘东孟凡佳孙大海武鑫张洋贺松松耿亮赵庆忠
Owner BC P INC CHINA NAT PETROLEUM CORP
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