Longitudinal welded pipe welding seam protrusion detecting system based on laser scanning

A technology of straight seam welded pipe and detection system, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems that the weld seam pout detection of straight seam welded pipes cannot be realized, and achieve the improvement of product qualification rate, production efficiency and adaptability Strong, high-precision judgment effect

Inactive Publication Date: 2017-01-11
HENAN POLYTECHNIC UNIV
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Problems solved by technology

However, this measuring device can only obtain the outer diameter and ovality of the steel pipe, and cannot realize the detection of the weld pout of the straight seam welded pipe

Method used

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  • Longitudinal welded pipe welding seam protrusion detecting system based on laser scanning
  • Longitudinal welded pipe welding seam protrusion detecting system based on laser scanning
  • Longitudinal welded pipe welding seam protrusion detecting system based on laser scanning

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Embodiment Construction

[0014] The pouting defect of the weld seam of longitudinally welded pipe is common in the production process of longitudinally welded pipe, which is made of a steel plate that is bent by pressure and then welded together. However, due to mechanical reasons or the material of the steel plate itself, the fitting of the forming seam of the welded pipe will be imperfect, resulting in the upward or downward pouting of the forming seam, which is the "pout" defect of the weld. When performing fault diagnosis on the pout of the welded pipe, if we can intuitively obtain the three-dimensional data of the welded pipe, we can calculate whether there is a defect in the position to be detected, so we need to find a way to obtain the three-dimensional data of the welded pipe.

[0015] Although the three-dimensional data of the welded pipe can be obtained by using a three-dimensional coordinate measuring instrument, this method has high environmental requirements, slow measurement speed, low m...

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Abstract

The invention discloses a longitudinal welded pipe welding seam protrusion detecting system based on laser scanning. The longitudinal welded pipe welding seam protrusion detecting system comprises a transmission device, a two-dimensional laser scanning sensor and an upper computer, wherein the two-dimensional laser scanning sensor is arranged above a welding seam and used for scanning the welding seam along the axial direction of a welded pipe at equal distance, and acquiring two-dimensional contour data of the welding seam and radial cross sections of the welded pipe on both sides of the welding seam at different positions; the transmission device is used for adjusting the position of the two-dimensional laser scanning sensor; and the upper computer is connected with a controller of transmission device and the two-dimensional laser scanning sensor through commutation lines. The longitudinal welded pipe welding seam protrusion detecting system based on laser scanning adopts a non-contact method for detecting types of welding seam protrusions of the welded pipe, and has the advantages of easy implementation, high adaptability, high precision and the like.

Description

technical field [0001] The patent of the present invention relates to a laser scanning-based weld pout detection system for straight seam welded pipes, which is used to detect the "pout" fault of welds during the production process of straight seam welded pipes, and belongs to the field of fault detection. Background technique [0002] With the development of our country's economy, the application of pipelines has been very extensive. Our transportation of oil and gas has gradually transitioned from transportation to pipeline transportation, such as the key project of "West-to-East Gas Pipeline". In order to ensure the safety of oil and gas during transportation, pipeline construction puts forward the requirements of "thick wall and high steel grade" for pipelines, so our demand for longitudinal welded pipes is also increasing. In the production process of longitudinally welded pipes, "pout" at the weld is a common defect. The curvature of the "pout" is irregular. If an ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
Inventor 王莉张元东王新苏波
Owner HENAN POLYTECHNIC UNIV
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