Calibration test block, detection system and detection method for nondestructive test on flange plate
A non-destructive testing and test block technology, applied in the direction of material magnetic variables, etc., can solve problems such as difficult to detect effectively, and flaw detection cannot be realized in the transition area of the flange neck, and achieve the effect of simple structure, improved efficiency, and improved work efficiency
Inactive Publication Date: 2013-12-25
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0007] However, it is difficult to effectively detect defects in the neck transition area (R corner) of the flange with the existing detection methods. For example, the magnetic particle inspection method needs to magnetize the flange, and the flange neck transition area Effective and rapid flaw detection cannot be realized
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[0042] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0043] In this embodiment, the calibration test block used for non-destructive testing of flanges is taken as an example, such as Figure 1 to Figure 4 As shown, the calibration test block for flange non-destructive testing provided by the embodiment of the present invention includes R angle parts 1 and R angle parts 2 respectively arranged on the upper and lower sides of the connection part 3; the R angle parts 1 are respectively arranged along the same circumference The circumferential groove 11, the oblique groove 12 and the axial groove 13, the angle between the oblique groove 12 and the circumferential direction of the calibration test block is 45 degrees; the circumferential grooves 21, 22 and 23 arranged along the same circumference at the R angle part 2 are respectively It corresponds to the circumferential groov...
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Abstract
The invention provides a calibration test block, a detection system and a detection method for a nondestructive test on a flange plate. Upper and lower sides of a connection part of the calibration test block are provided respectively with R-angle parts in parallel and the connection part and the R-angle parts are provided with grooves; and an array R-angle flexible eddy current probe of the detection system for the nondestructive test on the flange plate transmits an eddy current signal of the calibration test block to a multi-frequency array eddy current flaw detector, then a system calibration process is carried out, then the array R-angle flexible eddy current probe transmits an eddy current signal of the detected flange plate to the multi-frequency array eddy current flaw detector, and then a signal comparison process is carried out to determine if the detected flange plate is damaged. Compared with the prior art, the calibration test block, the detection system and the detection method for the nondestructive test on the flange plate can realize effective detection of the flange plate neck unable to be effectively detected in the past, are convenient for operation, improve flange plate surface detection efficiency, and satisfy requirements on detection of safety of a flange plate of a transmission tower. The calibration test block and the detection system have simple structures.
Description
technical field [0001] The invention relates to a calibration test block and a detection system for non-destructive testing of flanges, in particular to a calibration test block, a detection system and a detection method for non-destructive testing of flanges of UHV pipe towers. Background technique [0002] With the continuous acceleration of the development of electric power, the rapid development of the power grid, the continuous improvement of the operating voltage level of the power grid system, and the continuous expansion of the network scale, the country has formed 6 Northeast Power Grids, North China Power Grids, Central China Power Grids, East China Power Grids, Northwest Power Grids and Southern Power Grids. Large-scale regional power grids across provinces have basically formed a complete long-distance transmission grid. [0003] At present, power grid construction has become the main direction of my country's electric power construction, and the prospect of powe...
Claims
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IPC IPC(8): G01N27/90
Inventor 武英利王国俊包乐庆郭军
Owner STATE GRID CORP OF CHINA