Wall-climbing device for magnetic leakage detection on wall defects of storage tank and measurement method

A technology of magnetic flux leakage detection and tank wall, which is applied in the direction of material magnetic variable, etc., can solve the problems that the detection of tank wall with stepped deformation cross section cannot be realized, and achieve the effect of simple structure, flexible walking and small volume

Inactive Publication Date: 2015-06-10
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to change the defects of the manual detection of the storage tank wall and overcome the deficiency that the existing detectors cannot realize the detection of the stepped deformation cross-section tank wall

Method used

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  • Wall-climbing device for magnetic leakage detection on wall defects of storage tank and measurement method
  • Wall-climbing device for magnetic leakage detection on wall defects of storage tank and measurement method
  • Wall-climbing device for magnetic leakage detection on wall defects of storage tank and measurement method

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Embodiment Construction

[0017] The wall-climbing device for magnetic flux leakage detection will be further described below in conjunction with the accompanying drawings and embodiments. This embodiment is implemented on the premise of a technical solution, and provides a detailed implementation plan and a specific operation process.

[0018] like figure 1 , 2 , 3, 4, 5 and 6, first put two NdFeB permanent magnets 12 into two aluminum fixed shells 11 respectively, and make the magnetic poles opposite; then fix the aluminum fixed shells 11 below the armature 10, The magnetization direction of the magnet is the vertical direction, then the armature 10, the NdFeB permanent magnet 12 and the detected tank wall form a magnetic circuit to realize the adsorption and magnetization detection of the tank wall; , so that the adsorption mechanism 3 rises and falls up and down to change the size of the air gap, so that the purpose of adsorption and detection can be achieved under the situation of different wall ...

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Abstract

The invention relates to a wall-climbing device for magnetic leakage detection on wall defects of a storage tank and a measurement method. The device and the method are used for magnetic leakage detection on defects of a metal container and overcome the shortcomings that an existing detector can not complete detection on a stepped variable-section tank wall. According to the technical scheme, a vehicle frame is formed by connecting four supporting columns to an upper supporting pate and lower supporting plates through threads; four driving wheels are locked to output shafts of four driving motors respectively, and the driving motors are fixed to the lower supporting plate; an attraction mechanism comprises an armature, aluminum fixing shells and neodymium iron boron permanent magnets; a lead screw is connected with the armature through a hole and a lead screw nut; sliding rails are installed between the armature and the upper supporting plate; a probe box of a detection probe is connected with screws, and compression springs are installed on step shafts of the screws; a lifting drive is fixed to the upper supporting plate; a signal detection and analysis device is installed on the upper supporting plate. The wall-climbing device walks on the inner wall of the storage tank perpendicularly to complete detection, so that dangerous manual operation is avoided. The wall-climbing device is small in size, simple in structure and convenient to use.

Description

technical field [0001] The invention relates to a magnetic flux leakage detection for metal container defects, which is a wall-climbing device and measurement method for magnetic flux leakage detection of storage tank wall defects that use permanent magnets to realize adsorption and magnetic flux leakage detection, and is suitable for the field of petrochemical machinery. Background technique [0002] As one of the most common equipment in the petrochemical industry, storage tanks are responsible for important storage and transportation functions, and are also a deadly threat. The medium in the tank is usually flammable, explosive, and corrosive. In addition, due to the combined effect of the internal pressure of the tank and external rainwater, the tank wall is prone to defects such as depressions, cracks, and holes. These defects will not only cause tank leakage, but may even cause fire and explosion, causing environmental pollution and casualties. Therefore, the inspecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/83
Inventor 李亚梅唐东林赖欣蒋瑾袁波申杰斌李洋柯志军
Owner SOUTHWEST PETROLEUM UNIV
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