Automatic magnetic particle testing unit for toe cracks at inner wall of straight welded pipe

Abstract

The invention relates to a testing unit for a straight welded pipe, in particular to an automatic magnetic particle testing unit for toe cracks at inner wall of the straight welded pipe, comprising a car body consisting of a sweep template, a driving wheel, a stop block, a supporting plate, universal wheels and a guide bar which are connected with each other coaxially, and a rotary bearing, a driving motor, a control part, a steering engine, a position switch arranged on the two ends of one end of the car body, and a transformer bearing, a camera bearing, a sprayer bearing, a crossed yoke, an ultraviolet lamp bearing, and a water pump water tank bearing which are successively arranged on the top of the sweep template from left to right, wherein, the upper end of the stop block is fixedly connected with the two sides of the rear end of the sweep template bottom in parallel, the output end of the steering engine is fixedly connected with the universal wheels through the guide bar, the upper end of the rotary bearing is fixedly connected with the two sides of the rear end of the sweep template bottom in parallel, the lower end of the rotary bearing is fixedly connected with one end of the supporting plate, the other end of the supporting plate is fixed connected with the sweep template bottom, and output shaft of the driving motor is respectively connected with the two driving wheels fixedly. The invention can completely takes the place of manual work to carry out automatic magnetic particle testing, and has the advantages of compact structure and convenient operation.

Description

technical field [0001] The invention relates to a detection device for straight seam welded pipes, in particular to a detection device for weld toe cracks on the inner wall of straight seam welded pipes. Background technique [0002] During the production process of UOE straight seam welded pipe, non-destructive testing is required on the inner and outer wall welds of the welded pipe to grasp the welding quality of the product and provide corresponding basis for welding process optimization and quality control. Usually, after the internal and external welding is completed, ultrasonic and ray inspection are carried out first; after mechanical expansion and hydraulic test, ultrasonic and ray inspection and pipe end ray inspection are carried out; after the chamfering process is completed, ultrasonic and magnetic particle inspection are carried out on the pipe end . Through the above-mentioned non-destructive testing process, the welding quality of the inside of the weld and i...

AI Technical Summary

Problems solved by technology

[0006] Manual inspection applies uneven magnetization time and magnetic suspension to each weld, and large errors can easily cause defects to be missed;

[0007] The efficiency of manual inspection is low, which cannot meet the needs of automatic production and batch inspection of welded pipes;

[0008] The test results lack real-time monitoring, the test records are inaccurately located, and the intuitiveness is not strong

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