Overlaying layer stripping ultrasound detection imaging system of major-diameter thick-wall pressure vessel

Abstract

The invention relates to an overlaying layer stripping ultrasound detection imaging system of a major-diameter thick-wall pressure vessel, comprising a mechanical scanning device, an upper computer of a control system, a lower computer of the control system, an ultrasound data processing imaging system and the like; wherein the mechanical scanning device further comprises a magnet-wheel adsorption assembly, a mechanical beam assembly, a vertical movement assembly, an ultrasound probe fixture assembly and the like, the mechanical scanning device is fixedly arranged on the wall of the mechanical scanning device in an adsorption way by the magnet-wheel adsorption assembly, the upper computer of the control system and the lower computer of the control system drive a DC servo motor to drive the ultrasound probe fixture assembly to accomplish coarse scanning or refined scanning, the magnet-wheel adsorption assembly has regulating action and can adapt to the detection of thick-wall pressure vessels with different diameters, the imaging processing system can generate intuitive stripping area plane image; the invention uses modular design, which is convenient for field application. The system is stable in operation, and the combination of automatic control and manual control can satisfy control required by different operations, thus being suitable for overlaying layer stripping detection of thick-wall pressure vessels in petrochemical engineering or nuclear power industry.

Description

technical field [0001] The invention relates to an ultrasonic detection and imaging system for peeling of welding layers of containers, in particular to an ultrasonic detection and imaging system for semi-automatic ultrasonic inspection and data analysis of on-site large-diameter thick-walled pressure vessel surfacing layer peeling, which belongs to the ultrasonic detection and imaging system using ultrasonic technology. Semi-automatic inspection system for detecting objects. Background technique [0002] There are a large number of large-diameter thick-walled pressure vessels in the petrochemical and nuclear power fields. Taking the hydrogenation reactor in a chemical plant as an example, the hydrogenation reactor is the key equipment of the hydrocracking unit, and its main material is mostly 21 / 4Cr-1Mo. Due to the operation of the container under high temperature, high pressure and hydrogen exposure conditions, the following problems will be caused after long-term use: de...

AI Technical Summary

Problems solved by technology

Due to the operation of the container under high temperature, high pressure and hydrogen exposure conditions, the following problems will be caused after long-term use: delamination between the surfacing layer and the parent material and cracking on the surface of the surfacing layer. Once the delamination of the surfacing layer occurs, During the continuous operation of the equipment in the future, it will lead to the expansion of the interlayer peeling area of ​​the surfacing layer, and at the same time, it will also cause cracks under the surfacing layer of the pressure vessel.

According to the experience of operation and detection, most interlayer peeling occurs concentratedly in a specific area, and there are many small peeling areas in this area. It takes a lot of detection time to manually draw these small peeling boundary areas. For this, the relevant industry Research and development of new products, such as Chinese patent application No. 200610009690.2 (ultrasonic phased array detection imaging system for pipe joint welds), etc., although they have reached a certain accuracy, but the structure is relatively complicated

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