A method and device for detecting the bevel length of large-diameter pipe ends

Through ruler measurement and cosine theorem calculation, the problem of low detection accuracy of the bevel length of large-diameter pipe ends is solved, providing an efficient and economical detection method, simplifying the operation process and improving detection accuracy.

CN115773703BActive Publication Date: 2025-10-03SHANDONG DONGHONG PIPE IND
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Patent Information

Application Number
CN202211405390.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-10
Publication Date
2025-10-03
Estimated Expiration
2042-11-10

AI Technical Summary

Technical Problem

The existing manual detection method for the bevel length of large-diameter pipe ends has the problems of low detection accuracy and high cost, especially the square measurement and plumb bob measurement methods have large deviations.

Method used

Use a ruler to measure the dimensional relationship between the reference point and the test point, use the cosine theorem to calculate the inward or outward extension of the test point relative to the reference point, and determine the bevel length by obtaining the distance between the test points with the maximum outward and minimum inward extension dimensions. Combined with mathematical principles, accurate measurement is performed.

Benefits of technology

It realizes high-precision and low-cost detection of pipe bevel length. It is easy to operate and only requires common tools. No additional equipment is required. The detection is highly accurate and flexible and convenient.

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Abstract

The present invention relates to the field of pipe inspection technology, and in particular to a method for inspecting the bevel length of a large-diameter pipe end, comprising selecting a reference point A on the end surface to be inspected, a point B on the opposite end surface, measuring the pipe length at the reference point, and obtaining the two-point dimension L. AB ; Select n test points at random on the end surface to be tested, measure the size of each test point relative to point A and point B, and obtain multiple sets of data L Ai , L Bi , where 1≤i≤n; According to the cosine theorem, we can get the straight line L AB With L Ai The angle α value is used to determine whether the detection point is extended or extended relative to the vertical pipe axis reference plane where the reference point is located. The distance between the detection point with the largest extended dimension and the detection point with the largest extended dimension is the bevel cutting length. The present invention cleverly utilizes mathematical principles and the coordination of several points to obtain the calculation of the bevel cutting length.
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Citation Information

Patent Citations

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