Multi-dimensional probe holder for ultrasonic flaw detection of weld joint on spiral welded pipe

Abstract

The invention relates to the field of ultrasonic nondestructive test, particularly to a multi-dimensional probe holder for ultrasonic test of a weld joint on a spiral welded pipe. The invention is characterized in that: the multi-dimensional probe holder comprises a connecting seat, a horizontal beam, a flexible main shaft and probe clamping frames, wherein the connecting seat is arranged on the horizontal beam in a centering manner; a lifting cylinder is arranged in the groove-shaped connecting seat; the end part of the lifting cylinder is connected with the horizontal beam; the flexible main shaft is formed in a manner that more than three main shaft joints are hinged in sequence; the flexible main shaft is arranged below the horizontal beam and is connected with the horizontal beam by a central joint; adjusting screw rods are also arranged among the horizontal beam and other main shaft joints of the flexible main shaft; a probe clamping frame is arranged below each main shaft joint; and swing pins are arranged between the main shaft joints and the probe clamping frames. Compared with the prior art, the invention has the beneficial effects that: 1) the probe and the weld joint can be guaranteed to be fully bridged by the flexible main shaft, so that the test error is reduced; 2) the flexible main shaft takes a side swing joint as the first joint thereof, so that the probe and the weld joint can be bridged better; 3) the horizontal beam and the flexible main shaft are arranged in parallel up and down, so that stable shape and convenient regulation and control are realized.

Description

technical field [0001] The invention relates to the field of ultrasonic non-destructive flaw detection, in particular to a multi-dimensional probe frame for ultrasonic flaw detection of weld seams of spiral welded pipes. Background technique [0002] At present, the use of ultrasonic automatic flaw detection is a very economical and effective means to inspect and control the weld quality of spiral submerged arc welded pipes, and it is also a necessary detection method for the production of important pipelines in recent years. There are two rows of weld probes arranged symmetrically on the side. The weld probe emits ultrasonic waves, which are reflected back when they encounter defects in the steel pipe, and are received by this probe or other probes. After the signals are analyzed by the control system, the shape of the defect is drawn. All weld probes They are all installed on a weld probe frame, which moves along the weld seam under the control of the weld seam tracking sy...

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Problems solved by technology

[0002] At present, the use of ultrasonic automatic flaw detection is a very economical and effective means to inspect and control the weld quality of spiral submerged arc welded pipes, and it is also a necessary detection method for the production of important pipelines in recent years. There are two rows of weld probes arranged symmetrically on the side. The weld probe emits ultrasonic waves, which are reflected back when they encounter defects in the steel pipe, and are received by this probe or other probes. After the signals are analyzed by the control system, the shape of the defect is drawn. All weld probes They are all installed on a weld probe frame, which moves along the weld seam under the control of the weld seam tracking system. The frame is mostly designed as a space plate or connecting rod structure. When the diameter and wall thickness of the spiral tube change, the distance between the probes and the lifting angle must be adjusted. At present, the structure of the welded probe frame can only be adjusted simply. Therefore, the probe It cannot be guaranteed to be completely bridged with the outer wall of the steel pipe, thereby increasing the flaw detection error, and it is difficult to eliminate

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