Ultrasonic flaw-detecting machine for steel pipes

Abstract

The invention relates to an ultrasonic flaw-detecting machine for steel pipes. The ultrasonic flaw-detecting machine for the steel pipes is characterized in that: a flaw detection host machine comprises a box body, and two adjustable three-wheel centering devices are arranged at an inlet and an outlet on two sides of the box body respectively; a hollow spindle is arranged in the box body in a rotatable way, and a measured steel pipe passes through the hollow spindle, the inlet and the outlet; and the middle part of the hollow spindle is provided with at least three probe adjustment devices, an ultrasonic probe is arranged on each probe adjustment device, a power generation device and a signal pre-processing device are arranged outside the hollow spindle, and the signal pre-processing device is connected with the ultrasonic probes, and transmits detection data to an ultrasonic flaw detector of a control system by using a wireless signal. A structural form that the steel pipes are linearly pushed and the ultrasonic probes rotate is adopted, so that the pushing speed of the steel pipes is improved, and the flaw detection efficiency is improved; and the centrifugal force produced by the high-speed rotation of the hollow spindle extrudes the air in a detection cavity, and water is supplied by using an interlayer between an inner sleeve and the hollow spindle, so that the water supply quantity is large, bubbles are reduced, and the detection accuracy is improved.

Description

technical field [0001] The invention relates to a device for detecting manufacturing defects of steel pipes by using ultrasonic waves, in particular to an ultrasonic flaw detector for steel pipes, which is used in steel pipe factories to detect the quality of steel pipes. Background technique [0002] In the manufacturing process of steel pipes, due to problems such as slag inclusions in raw materials or loose materials, defects such as cracks and trachoma will occur after the steel pipes are formed. In order to ensure the quality of steel pipe products and reduce potential safety hazards in use, ultrasonic flaw detection equipment is required Steel pipes are tested. Existing ultrasonic flaw detectors for steel pipes usually adopt a structural form in which the steel pipe is spirally propelled and the ultrasonic probe is stationary. Due to the slow propulsion speed of the steel pipe, the detection efficiency of this type of steel pipe ultrasonic flaw detector is low; and the...

AI Technical Summary

Problems solved by technology

Existing ultrasonic flaw detectors for steel pipes usually adopt a structural form in which the steel pipe is spirally propelled and the ultrasonic probe does not move. Due to the slow propulsion speed of the steel pipe spiral, the detection efficiency of this type of steel pipe ultrasonic flaw detector is low; and the ultrasonic flaw detection must use acoustic coupling media. In the automatic flaw detection equipment, water is used as the coupling medium. The water supply system of the existing ultrasonic flaw detector is slow in water supply, and blisters are easily generated in the detection chamber, which increases the blind area at the end, reduces the flaw detection sensitivity or produces blister interference, thus affecting the detection. Accuracy

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