A magnetic adsorption patch device

Abstract

A magnetic adsorption type surface mounting device comprises an adsorption assembly and a surface mounting assembly. The surface mounting assembly is arranged on a supporting rack in the adsorption assembly, and the surface mounting assembly can slide on the supporting rack in the adsorption assembly, and is fixed on the supporting rack in the adsorption assembly through a locking nut. The adsorption assembly adsorbs the device on the internal surface of a longitudinal weld in a cylindrical workpiece made of a ferromagnetic material, and the surface mounting device makes a camera bag filled with films closely mounted on the internal surface of the detected segment of the longitudinal weld. The surface mounting operation of the internal surface of the longitudinal weld in the cylindrical workpiece made of the ferromagnetic material is completed outside the workpiece, so an operator is prevented from entering the workpiece during surface amounting, and the labor intensity is reduced. Thedevice reduces the lower limit value of the internal diameter of the cylindrical workpiece of a useable source in an outer single-wall viewing scheme, and avoids the reduction of the detection sensitivity of the workpiece, caused by a used source in outer double-wall viewing. The device has the advantages of simplicity in operation, rapidness and accuracy in close mounting of the camera bag filled with the films on the internal surface of the longitudinal weld in the cylindrical workpiece, close lamination of the films to the weld, improvement of the detection efficiency, and high detection sensitivity.

Description

technical field [0001] The invention relates to the field of radiation detection, in particular to a magnetic adsorption patch device. Background technique [0002] The pressure vessel industry and the aerospace field often manufacture some cylindrical workpieces with longitudinal welds as parts of the product. This kind of cylindrical workpiece with longitudinal welds is mostly made of ferromagnetic steel sheet welding. The longitudinal welds are the weak areas of the product. Generally, the welds and their heat-affected zones must be internally inspected. quality inspection. Radiographic inspection is a commonly used internal quality inspection method for longitudinal welds of cylindrical workpieces. In general, there are three schemes for radiographic testing of longitudinal welds of cylindrical workpieces: single-wall transillumination with a ray source inside, single-wall transillumination with a ray source outside, and double-wall transillumination with a ray source ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problem in the prior art that the operator needs to enter the internal patch of the cylindrical workpiece due to the use of the ray source in the external single-wall transillumination, and the operator cannot enter the internal patch due to the small diameter of the workpiece, so only a low sensitivity can be used For the problem of transillumination on the outer double wall of the ray source, the present invention proposes a magnetic adsorption patch device

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