Automatic scanning device with guide rail, phased array ultrasonic detection method and phased array ultrasonic detection system

Abstract

The embodiment of the invention provides an automatic scanning device with a guide rail, a phased array ultrasonic detection method and a phased array ultrasonic detection system. The automatic scanning device comprises a frame main body provided with the slide rail and the guide rail, and a probe lifting assembly fixed on the rail of the slide rail; the frame main body is effectively fixed on a detection surface of a scanned object through a bandage; a probe wedge block is arranged at the bottom of the probe lifting assembly, a first through hole used for limiting a probe of the phased arraydetector is formed in the probe wedge block, an upper fixing plate is arranged at the top of the probe lifting assembly, and at least one spring is arranged on the upper fixing plate; one end of the spring is connected with the upper fixing plate, the other end of the spring abuts against the lower fixing plate, and vertical downward pressure is applied to the lower fixing plate and the clamping legs when the spring is in a compressed state so that a probe of the phased array detector can be tightly attached to the detection face of an object to be scanned. The detection efficiency can be improved.

Description

technical field [0001] The present application relates to the field of testing equipment, in particular to an automatic scanning device with guide rails, a phased array ultrasonic testing method and system. Background technique [0002] GIS (gas insulated substation) is the English abbreviation of gas insulated fully enclosed combined electrical appliances. GIS is composed of circuit breaker, isolating switch, grounding switch, transformer (CT, PT), lightning arrester, bus bar, connector and outlet terminal, etc. All these devices or components are enclosed in a metal grounding shell, and a certain amount of water is filled inside it. Pressure SF6 insulating gas, so it is also called SF6 fully enclosed combined electrical appliances. [0003] At present, the tank materials of various manufacturers are mainly aluminum alloy 5A02-H112 or 5083 grades, and some tank materials are made of stainless steel or low carbon steel. The thickness of the tank body of the voltage level b...

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Problems solved by technology

[0006] 1. The direction of the weld defect of the GIS shell is uncertain, but the refraction angle of the conventional ultrasonic probe is fixed, so it cannot always guarantee the best detection angle of the defect, which may cause the defect signal to be smaller than the actual defect or the defect cannot be detected;

[0007] 2. Since the GIS shell is very thin, most of which are only 8mm thick, it is very difficult to identify the A-scan signal, and the defect signal is easily submerged in the initial test pulse signal, resulting in missed detection;

[0008] 3. Due to the need to move the probe back and forth during conventional A-ultrasound testing, and the GIS shell has curvature, the coupling between the probe and the shell is not good during the forward and backward movement, which will also lead to missed detection of defects

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