Pipe gap detection device and method for steel pipe for ultrasonic inspection

A detection device and ultrasonic technology, applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, material magnetic variables, etc., can solve the problems of detector damage, uncontrolled steel pipe quality, etc., to prevent damage, avoid product quality accidents, prevent The effects of false detections and false positives

CN1924569BInactive Publication Date: 2010-04-28BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2010-04-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to one steel tube gap testing device and method by use of hypersonic wave. The device comprises first test ring and second ring, first signal process unit and second signal process unit, logic judging unit, signal output unit and warning unit. The method comprises the following steps: electrifying the first and second test ring to couple with steel tube to generate magneticsensing signal and sending it to the first and second signal process units; the process units filtering and selecting the above signals and sending them to the logic judge unit; the unit judging steeltube signal and large wound signal to the output unit and warning unit.
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Description

technical field

[0001] The invention relates to non-destructive detection technology, in particular to a device and method for detecting the pipe gap of steel pipes when ultrasonic flaw detection is adopted. Background technique

[0002] In the metallurgical industry, the steel pipes currently produced by steel pipe manufacturers generally adopt non-destructive testing technologies such as ultrasonic flaw detection, eddy current flaw detection, and magnetic particle flaw detection. There are comprehensive advantages, so ultrasonic flaw detection is widely used in steel pipe inspection.

[0003] At present, the pulse reflection method is used in ultrasonic flaw detection, and its working principle is: the synchronous circuit generates a periodic synchronous pulse signal, which triggers the transmitting circuit to generate an electric pulse with a very short duration, that is, the transmitting pulse is applied to the probe, which stimulates the probe to generate Pulse ultraso...

Examples

Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as Figure 5 and Figure 6As shown, the pipe gap detection device according to the preferred embodiment of the present invention includes a coil part and a circuit part. The device is installed in the existing combined flaw detection unit 100 and is located on the front side of the eddy current flaw detector 6 and the ultrasonic flaw detector 7. The coil part includes a first detection coil 11 and a second detection coil 12; the circuit part includes a first signal processing unit 21 and a second signal processing unit 22 respectively corresponding to the coil 11 and the coil 12, a logic judgment unit 3, and a signal output unit 41 and alarm unit 42. Wherein, the first detection coil 11 and the second detection coil 12 are 180° relatively arranged on the upper and lower sides of the steel pipe 5, and the distance from the surface of the steel pipe to be t...