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A pipe end magnetic detector

A technology of pipe end and magnetic detection, which is applied in the direction of material magnetic variables, etc., can solve the problems of non-display, limited penetration of DC magnetic field, etc., and achieve the effect of improving work efficiency and avoiding the phenomenon of electric arcing

Active Publication Date: 2017-12-29
SHANGHAI CHENGYOU INDAL GROUP +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The disadvantage is that the penetration of the DC magnetic field is limited, and the effect is good for thin-walled tubes; for thick-walled tubes, inner surface defects cannot be displayed

Method used

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  • A pipe end magnetic detector
  • A pipe end magnetic detector
  • A pipe end magnetic detector

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Embodiment Construction

[0021] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.

[0022] The pipe end magnetic detector provided by the present invention is non-contact induction flaw detection. A flaw detection area is surrounded by three sets of yoke coil magnetization devices, and the inner and outer surfaces of the pipe end in the flaw detection area are magnetized circumferentially and longitudinally. Such as figure 1 As shown, it is a schematic diagram of the pipe end flaw detection area. After the inner and outer surfaces of the pipe end in the flaw detection area A are magnetized and sprayed, defects in various directions can be displayed under ultraviolet light.

[0023] Such as figure 2 and image 3 As shown, it is a schematic diagram of a pipe end magnetic detector provided by the present invention. The pipe end magnetic detector includes an underframe 3 on which a trolley track is installed, and ...

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Abstract

The invention provides a pipe end magnetic detector, which includes a base frame on which a pneumatic advancing and retreating trolley is arranged, an electric lifting platform is arranged on the pneumatic advancing and retreating trolley, and two pipe end outer surfaces are clamped on the electric lifting platform. The yoke coil magnetization device and the yoke coil magnetization device for clamping the inner surface of the casing end; the electric lifting platform is also equipped with a spray pipe, an ultraviolet light source and a camera, and a liquid collection tray is also provided on the bottom frame. Connect the magnetic suspension tank, and the magnetic suspension tank is connected with the spray pipe. The device provided by the invention overcomes the deficiencies of the prior art, adopts the non-contact induction method for flaw detection, and can simultaneously perform circumferential and longitudinal magnetization on the inner and outer surfaces of the steel pipe end, avoids the phenomenon of electric arcing, and realizes magnetization at the same station / observation / demagnetization, which greatly improves work efficiency.

Description

technical field [0001] The invention relates to a pipe end magnetic detection machine, in particular to a special magnetic particle flaw detection machine for on-line detection of defects in the inner and outer surfaces of the steel pipe end area and grooves in various directions during the steel pipe production process. Background technique [0002] A large number of steel pipes used in oil and gas transmission pipelines and oil and gas production casings must be inspected during the manufacturing process in order to ensure their safety and reliability in use. Ultrasonic, eddy current, magnetic flux leakage and other methods are used in the industry to detect flaws on the pipe body, but for these types of methods, the 400mm end of the steel pipe is a blind spot for flaw detection, and the early solution is to cut the end of the pipe, causing a lot of damage. Big waste. Later, the non-destructive testing professional manufacturer represented by Italian CGM company developed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/84
Inventor 赵成
Owner SHANGHAI CHENGYOU INDAL GROUP
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