CN113340982B - Magnetic flux leakage detection equipment calibration device and detection method for surface quality of steel pipe - Google Patents
Magnetic flux leakage detection equipment calibration device and detection method for surface quality of steel pipe Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 198
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 79
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- 230000004907 flux Effects 0.000 title claims abstract description 32
- 230000007547 defect Effects 0.000 claims abstract description 106
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- 238000003801 milling Methods 0.000 claims description 6
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- 230000000694 effects Effects 0.000 claims description 2
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- 239000007921 spray Substances 0.000 claims description 2
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- 206010039509 Scab Diseases 0.000 description 3
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- 230000007797 corrosion Effects 0.000 description 2
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- 238000003756 stirring Methods 0.000 description 2
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Abstract
The invention provides a magnetic flux leakage detection equipment calibration device and a detection method for the surface quality of a steel pipe, and the magnetic flux leakage detection equipment calibration device comprises a cylindrical pipe body calibration device, wherein multiple artificial defects are sequentially arranged from one end to the other end of the cylindrical pipe body calibration device, and multiple artificial defects are arranged for each type; each artificial defect is spirally distributed around the cylindrical pipe body, and enough space is kept; the inner surface of the cylindrical tube body is provided with artificial defects with the same size, depth and shape as the outer surface, and the positions of the artificial defects correspond to the outer surface one by one. The problem of can not detect out the artificial defect of near surface among the current pipeline magnetic leakage detection technology, the artificial defect of the hole or groove that correspond is single, width and degree of depth are great, sensitivity is relatively poor is solved. The magnetic flux leakage detection sensitivity is improved, the detection range is expanded, the accuracy of detection results is improved, and the type, size and depth of defects encountered in the detection process can be determined. The uniqueness of the defects is ensured, the missing detection can be effectively avoided, and the method is suitable for popularization and use.
Description
Technical Field
The invention relates to the field of magnetic flux leakage detection, in particular to a calibration device and a detection method of magnetic flux leakage detection equipment for the surface quality of a steel pipe.
Background
Various standards at home and abroad increasingly require the surface quality of steel pipes. In recent years, the security evaluation is carried out on the running safety of the in-service pipeline by adopting a magnetic leakage internal detection technology, the technology has high detection sensitivity and automatic and accurate defect positioning, is the most mature technology for detecting the internal surface quality of the in-service pipeline recognized at home and abroad, is widely applied to the production line of seamless steel pipes, but the production line of submerged arc welding steel pipes still belongs to the blank field. At present, the surface quality detection of submerged arc welded steel pipes on a production line mainly depends on manual visual inspection, the detection efficiency is low, and the appearance quality control is greatly influenced by human factors. Therefore, it is of interest to rapidly and effectively detect the surface quality of a submerged arc welded steel pipe on a production line by a nondestructive inspection technique.
At present, eddy current detection and magnetic flux leakage detection are adopted as methods for nondestructive detection of surface and near-surface defects of a steel pipe of a production line, magnetic flux leakage detection is adopted as a nondestructive detection method for equivalent defects such as corrosion generated on the inner surface and the outer surface of a pipeline in service and mechanical damage, a calibration method for nondestructive detection of magnetic flux leakage detection of NB/0-1MM47013.12 pressure-bearing equipment is mostly referred to for calibration, and the method mainly aims at loss defects of appearance metals, width of artificial defects is more than or equal to 10mm, and the most strict requirement on depth is 5% of wall thickness. There are no artifacts corresponding to near surface defects such as near surface delamination and cracks.
Disclosure of Invention
The invention mainly aims to provide a calibration device and a detection method for magnetic flux leakage detection equipment for the surface quality of a steel pipe, which solve the problems that no artificial defect corresponding to a near-surface defect exists in magnetic flux leakage detection, and the defects corresponding to holes or grooves in the existing magnetic flux leakage detection technology are single, the width and the depth are large, and the sensitivity is poor.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the device comprises a cylindrical pipe body calibration device, wherein a plurality of artificial defects are sequentially arranged from one end to the other end of the cylindrical pipe body calibration device, and a plurality of artificial defects are arranged in each artificial defect;
each artificial defect is spirally distributed around the cylindrical pipe body, and enough space is kept;
the inner surface of the cylindrical tube body is provided with artificial defects with the same size, depth and shape as the outer surface, and the positions of the artificial defects are in one-to-one correspondence with the outer surface.
In a preferred embodiment, the plurality of artificial defects comprises a first N-shaped groove, a second N-shaped groove, a first spherical hole, a second spherical hole, a first V-shaped tapered hole, a second V-shaped tapered hole, a flat bottom hole and an embedded artificial delamination.
In a preferable scheme, the width of the first N-shaped groove is not more than 0.3mm, the depths of the first N-shaped groove are respectively 0 to 1mm, 1 to 2mm and 2 to 3mm, the maximum depth is not more than 3mm, the length of the first N-shaped groove is three times of the width or not more than the size of the probe, and the smaller value of the two is selected.
In a preferable scheme, the width of the second N-shaped groove is not more than 10mm, the depths of the second N-shaped groove are respectively 0 to 1mm, 1 to 2mm and 2 to 3mm, the maximum depth is not more than 3mm, the length of the second N-shaped groove is three times of the width or not more than the size of the probe, and the smaller value of the two is taken.
In a preferred scheme, the diameters of the first spherical hole and the second spherical hole are respectively 6mm and 25mm, the outer surface of the cylinder calibration device is respectively processed to a depth of 0 to 1mm, 1 to 2mm and 2 to 3mm, and the maximum depth is not more than 3mm.
In the preferred scheme, the diameters of the first V-shaped taper hole and the second V-shaped taper hole are respectively 6mm and 25mm, the outer surface of the cylinder calibration device is respectively processed to have the depths of 0-1mm, 1-2mm and 2-3mm, and the maximum depth is not more than 3mm.
In a preferred scheme, the diameter of the flat bottom hole is 0.8mm, the outer surface of the cylindrical calibration device is respectively processed to a depth of 0 to 1mm, 1 to 2mm and 2 to 3mm, and the maximum depth is not more than 3mm.
In a preferred scheme, the embedded artificial layering is a flat-bottom hole with the diameter of 6-25mm, the depth of the flat-bottom hole is 0-1mm, 1-2mm and 2-3mm, the maximum depth is not more than 3mm, the embedded artificial layering is filled with the same material, the gap of a layer surface is not more than 0.8mm, and the embedded artificial layering is respectively processed at the position where the distance from the near surface of the outer wall of the cylindrical calibration device is 0-1mm, 1-2mm and 2-3mm, and the maximum depth is not more than 3mm.
In the preferred scheme, a first N-shaped groove and a second N-shaped groove are machined by a grooving machine, a first spherical hole, a second spherical hole and a first V-shaped taper hole are machined by a ball-end milling cutter, and a flat-bottom hole and an embedded manual layering are machined by a cylindrical milling cutter.
A detection method of a magnetic flux leakage detection equipment calibration device for the surface quality of a steel pipe comprises the following steps: s1, manufacturing a magnetic flux leakage detection device calibration sample tube according to requirements, and connecting the magnetic flux leakage detection device calibration sample tube with a detection system;
s2, conveying the inner detection trolley to the front of a calibration sample tube by using a rail trolley, carrying the outer detection trolley by using a centering gantry frame to move from an original point position to the front of a tube head of the calibration sample tube, adjusting the inner detection trolley and the outer detection trolley to proper heights according to the specification of the sample tube, manually controlling the switches of the inner detection trolley and the outer detection trolley, moving the inner detection trolley into the calibration sample tube, moving the outer detection trolley to the upper part of the calibration sample tube, and dropping an inner detection probe of the inner detection trolley and an outer detection probe of the outer detection trolley onto the surface of the calibration sample tube;
s3, adjusting the detection sensitivity of the equipment: starting magnetization, electrifying the external magnetizer, rotating the rotary tire to rotate the sample tube, positioning the artificial defect on the calibrated sample tube below the probe, finely adjusting the rotary sample tube to ensure that the amplitude of the waveform detected by the probe on the artificial defect reaches the highest, adjusting the gain of the instrument to adjust the amplitude of the waveform to 50% of the full amplitude, in order to ensure the detection effect, adjusting the amplitude of the bottom wave to be lower than the amplitude of the detected waveform 10 dB, adjusting the height of the alarm gate to 50% of the full amplitude, amplifying and filtering different defect detection signals output by the internal and external detection probes without distortion, and verifying the sensitivity of the detection probes by using the generated signals;
s4, the equipment enters a position to be detected: turning off magnetization, powering off the inner magnetizer and the outer magnetizer, manually controlling the inner detection probe and the outer detection probe to be in a rising position, returning the inner detection trolley to the original point position by using a rail trolley, carrying the outer detection trolley by using a centering gantry to return to the original point position, and conveying the sample tube to a storage position by using a kick-out device;
s5, detecting a first pipe fitting: conveying a steel pipe to be detected to a rotating tire through a material poking and receiving device, carrying the inner detection trolley and the outer detection trolley by the rail trolley and the righting gantry frame, moving the inner detection trolley and the outer detection trolley to the front of a pipe head of the steel pipe to be detected, stopping moving the steel pipe, starting to rotate the steel pipe, carrying the outer detection trolley by the inner detection trolley and the righting gantry frame, moving the inner detection trolley and the outer detection trolley forwards, sequentially dropping the inner detection probe and the outer detection probe to mark the defects on the inner surface and the outer surface of the steel pipe, giving out sound and light alarms while marking, when detecting the tail of the steel pipe, sequentially lifting the inner detection probe and the outer detection probe, carrying the inner detection trolley and the righting gantry frame, moving the inner detection trolley and the outer detection trolley to an origin position, conveying the steel pipe to an outlet pipe rack by the material poking device, and conveying a flaw detection result to a computer for browsing and storing;
s6, repeating the operation of the step S5, and detecting the next steel pipe to be detected until the detection of the steel pipe to be detected is finished;
through the steps, the magnetic flux leakage detection of the surface quality of the steel pipe is realized.
The invention provides a calibration device and a detection method for magnetic leakage detection equipment of surface quality of a steel pipe, wherein a plurality of artificial defects are sequentially arranged from one end to the other end of a cylindrical pipe body calibration device, each artificial defect is provided with a plurality of artificial defects, each artificial defect is spirally distributed around the cylindrical pipe body, enough intervals are kept, different artificial defects correspond to defects existing in the steel pipe in the detection process, and the problems that the artificial defects close to the surface cannot be detected in the existing pipeline magnetic leakage detection technology, the corresponding holes or grooves have single artificial defects, larger width and depth and poorer sensitivity are solved. Set up artificial defects such as multiple first N-shaped groove, second N-shaped groove, first spherical hole, the spherical hole of second, first V-arrangement taper hole, the V-arrangement taper hole of second, flat hole and embedded artifical layering, it is limited to improve magnetic leakage detectivity, has enlarged measuring range, has promoted the degree of accuracy of testing result, the kind, the size, the degree of depth of the defect that can be accurate definite testing in-process meets. The uniqueness of the defects is ensured, and meanwhile, the missing detection errors can be effectively avoided. Is suitable for popularization and application.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is an elevational view of the overall construction of the present invention;
FIG. 2 is an isometric view of the overall structure of the present invention;
FIG. 3 is an isometric view of the overall structure of the present invention;
FIG. 4 is a rotated cross-sectional view of a first N-shaped groove of the present invention;
FIG. 5 is a rotary cross-sectional view of a second N-shaped groove of the present invention;
FIG. 6 is a cross-sectional view of a first spherical hole of the present invention in rotation;
FIG. 7 is a rotary cross-sectional view of a second spherical hole of the present invention;
FIG. 8 is a cross-sectional view of a first V-shaped countersink of the present invention;
FIG. 9 is a cross-sectional view of a second V-shaped countersink of the present invention;
FIG. 10 is a rotated cross-sectional view of the flat bottom hole of the present invention;
FIG. 11 is a cross-sectional view of an embedded manual layer of the present invention;
FIG. 12 is a front view of the apparatus for testing the outer test cart of the present invention;
FIG. 13 is a side view of the apparatus of the present invention during inspection with the outer inspection trolley;
FIG. 14 is a front view of the apparatus for detecting a car in accordance with the present invention;
FIG. 15 is a side view of the apparatus for detecting a car in accordance with the present invention;
in the figure: a first N-shaped groove 1; a second N-shaped groove 2; a first spherical hole 3; a second spherical hole 4; a first V-shaped taper hole 5; a second V-shaped taper hole 6; a flat bottom hole 7; embedded artificial layering 8; a steel pipe 9; righting the gantry frame 10; an external detection trolley 11; an electric push rod 12; an adjusting mechanism 13; a rolling roller 14; a first slide rail 15; an inner detection trolley 16; a small rail car 17; a second slide rail 18.
Detailed Description
Example 1
As shown in fig. 1 to 15, a magnetic flux leakage detection equipment calibration device and a detection method for the surface quality of a steel pipe comprise a cylindrical pipe body calibration device, wherein multiple artificial defects are sequentially arranged from one end to the other end of the cylindrical pipe body calibration device, and multiple artificial defects are arranged for each artificial defect;
each artificial defect is spirally distributed around the cylindrical pipe body, and enough space is kept;
the inner surface of the cylindrical tube body is provided with artificial defects with the same size, depth and shape as the outer surface, and the positions of the artificial defects correspond to the outer surface one by one. From this structure, cylindrical body calibration device can be to a plurality of different defects, like folding, mar, scab, crackle, surperficial inclusion etc. do corresponding defect form, various artificial defect heliciform distribute to keep enough interval, ensured the uniqueness of defect, when can effectively avoid causing the detection error, the effectual detectivity that improves magnetic leakage check out test set calibration device avoids appearing different defects in the testing process and forms in same place, and the display characteristic is ambiguous. The artificial defects should be kept sufficiently spaced to ensure a clear and discernable reference reflection signal. In the figure, a is a first artificial defect with the depth of 0-1mm. b is a second artificial defect with the depth of 1 to 2mm. c is the third artificial defect with the depth of 2 to 3mm.
In a preferred scheme, the plurality of artificial defects comprise a first N-shaped groove 1, a second N-shaped groove 2, a first spherical hole 3, a second spherical hole 4, a first V-shaped conical hole 5, a second V-shaped conical hole 6, a flat-bottom hole 7 and an embedded artificial delamination 8. With the structure, different artificial defects comprise an N-shaped groove, a spherical hole, a taper hole, a flat bottom hole, artificial layering and the like, and can contain various defects of corrosion generated on the inner surface and the outer surface of the pipeline in magnetic flux leakage detection and volume defects of mechanical damage and the like. The included artificial defects are enough to carry out surface quality detection on the submerged arc welded steel pipe on the production line quickly and effectively by a nondestructive detection technology.
In a preferable scheme, the width of the first N-shaped groove 1 is not more than 0.3mm, the depths of the first N-shaped groove 1 are respectively 0 to 1mm, 1 to 2mm and 2 to 3mm, the maximum is not more than 3mm, the length of the first N-shaped groove 1 is three times of the width or not more than the size of the probe, and the smaller value is selected. From this structure to the position that the defect produced mainly divides steel pipe surface defect and nearly surface defect, and the defect mainly distributes in the nearly surperficial degree of depth 3mm within range of steel pipe, and the crackle is the most sensitive to above-mentioned artificial groove in the magnetic leakage detection, and sensitivity is higher, thereby improves the detection efficiency who detects the crackle defect, and first N shape groove 1 sets up the different degree of depth respectively, can measure not equidirectional in the testing process, the crackle defect of the different degree of depth avoids appearing the phenomenon of lou examining. And the width of the first N-shaped groove 1 is not more than 0.3mm, and the sensitivity to the defect with smaller crack width is higher.
In a preferable scheme, the width of the second N-shaped groove 2 is not more than 10mm, the depths of the second N-shaped groove 2 are respectively 0 to 1mm, 1 to 2mm and 2 to 3mm, the maximum depth is not more than 3mm, the length of the second N-shaped groove 2 is three times of the width or not more than the size of the probe, and the smaller value is taken. From this structure to the position that the defect produced mainly divides steel pipe surface defect and nearly surface defect, and the defect mainly distributes in the nearly surperficial degree of depth 3mm within range of steel pipe, and the crackle is the most sensitive to above-mentioned artificial groove in the magnetic leakage detection, and sensitivity is higher, thereby improves the detection efficiency who detects the crackle defect, and first N shape groove 1 sets up the different degree of depth respectively, can measure not equidirectional in the testing process, the crackle defect of the different degree of depth avoids appearing the phenomenon of lou examining. And the width of the second N-shaped groove 2 is not more than 10mm, and the sensitivity to the defect with wider crack width is higher.
In the preferred scheme, the diameters of the first spherical hole 3 and the second spherical hole 4 are respectively 6mm and 25mm, the outer surface of the cylinder calibration device is respectively processed to have the depths of 0-1mm, 1-2mm and 2-3mm, and the maximum depth is not more than 3mm. With the structure, the defects formed by the spherical hole corresponding to the round bottom indentation are sensitive, and the defects corresponding to the steel pipe can be detected by different depths corresponding to the spherical hole corresponding to the defects formed by the submerged arc welding of some round bottom objects.
In the preferred scheme, the diameters of the first V-shaped taper hole 5 and the second V-shaped taper hole 6 are respectively 6mm and 25mm, the outer surface of the cylinder calibration device is respectively processed to the depths of 0-1mm, 1-2mm and 2-3mm, and the maximum depth is not more than 3mm. From this structure, the V-arrangement taper hole is comparatively sensitive to the defect that the sharp-pointed indent formed, sets up the V-arrangement taper hole artificial defect of the different degree of depth, can detect out the poroid defect that causes the different degree of depth by sharp object on the steel pipe. Enriching the capability of detecting different defects.
In the preferred scheme, the diameter of the flat-bottom hole 7 is 0.8mm, the depths of the flat-bottom hole are respectively 0-1mm, 1-2mm and 2-3mm, and the maximum depth of the flat-bottom hole is not more than 3mm. From this structure, flat hole is corresponding to the pinhole defect, sets up the artifical flat hole of the different degree of depth, can detect the pinhole defect of the different degree of depth in the steel pipe, has richened the ability that detects different defects.
In a preferred scheme, the embedded artificial layering 8 is a flat-bottom hole with the diameter of 6 to 25mm, the depth of the flat-bottom hole is 0 to 1mm, 1 to 2mm and 2 to 3mm, the maximum depth is not more than 3mm, the embedded artificial layering is filled with the same material, the gap of the layer surface is not more than 0.8mm, and the embedded artificial layering is respectively processed at the position where the distance from the near surface of the outer wall of the cylindrical calibration device is 0 to 1mm, 1 to 2mm and 2 to 3mm, and the maximum depth is not more than 3mm. From this structure, add artifical layering at cylinder calibration device, folding, heavy skin, scab, mix with comparatively sensitive to the inside flat bottom hole of artifical layering, can steel pipe surface folding, heavy skin, scab, mix with in the testing process, set up the flat bottom hole area that becomes different degree of depth, different apertures and detect the defect, can detect the different degree of depth, the above-mentioned defect of size improves detectivity, fills with the same material, avoids appearing defects such as folding, mix with.
In the preferred scheme, a first N-shaped groove 1 and a second N-shaped groove 2 are machined by a grooving machine, a first spherical hole 3, a second spherical hole 4, a first V-shaped taper hole 5 and a second V-shaped taper hole 6 are machined by a ball-end milling cutter, and a flat bottom hole 7 and an embedded artificial layering 8 are machined by a cylindrical milling cutter. According to the structure, the processing is fast and convenient, different processing methods are applied to different artificial defects, the roughness of each surface of the cylinder calibration device can be ensured, and the defects of folding, layering, inclusion and the like caused by the fact that the method is not suitable in the cylinder calibration device during the manual processing are avoided, so that the magnetic flux leakage detection result correctness is not influenced.
Example 2
To further explain with reference to embodiment 1, as shown in fig. 1 to 15, a calibration sample tube of magnetic flux leakage detection equipment is manufactured as required, and is connected with a detection system. The inner detection trolley 16 is conveyed to the front of a calibration sample tube by a rail trolley 17, the outer detection trolley 11 is carried by a centering gantry frame 10 to move from an original point position to the front of a tube head of the calibration sample tube, the inner detection trolley 16 and the outer detection trolley 11 are adjusted to be proper in height according to the specification of the sample tube, the inner detection trolley 16 and the outer detection trolley 11 are manually controlled to be switched, the inner detection trolley 16 is moved into the calibration sample tube, the outer detection trolley 11 is moved above the calibration sample tube, and an inner detection probe of the inner detection trolley 16 and an outer detection probe of the outer detection trolley 11 fall on the surface of the calibration sample tube. And (3) equipment detection sensitivity adjustment: starting magnetization, electrifying the external magnetizer, rotating the rotary tire to rotate the sample tube, positioning the artificial defect on the calibrated sample tube below the probe, finely adjusting the rotary sample tube to ensure that the amplitude of the waveform detected by the probe on the artificial defect is the highest, adjusting the gain of the instrument to adjust the amplitude of the waveform to 50% of the full amplitude, adjusting the amplitude of the bottom wave to be lower than the amplitude of the detected waveform to 10 dB and the height of the alarm gate to 50% of the full amplitude, recording the flaw detection waveform diagrams of each different flaw, amplifying and filtering different flaw detection signals output by the internal and external detection probes without distortion, and verifying the sensitivity of the detection probes by using the generated signals. The equipment enters a position to be detected: the magnetization is closed, the inner magnetizer and the outer magnetizer are powered off, the inner detection probe and the outer detection probe are manually controlled to be in a lifting position, the inner detection trolley 16 returns to the original point position by the rail trolley 17, the outer detection trolley 11 is carried by the centering gantry frame 10 to return to the original point position, and the sample tubes are conveyed to the storage position by the kick-out device. Detecting a first pipe fitting: the steel pipe 9 to be detected is conveyed to a rotating tire through a material stirring and receiving device, the rail trolley 17 and the righting gantry frame 10 carry the inner detection trolley 16 and the outer detection trolley 11 to move to the front of the pipe head of the steel pipe to be detected and then stop advancing, the steel pipe 9 starts to rotate, the inner detection trolley 16 and the righting gantry frame 10 carry the outer detection trolley 11 to move forwards, the inner detection trolley and the outer detection trolley sequentially fall down to detect the outer surface defects of the steel pipe 9, when a threshold value exceeds the standard, the spray gun respectively marks the inner surface defects and the outer surface defects of the steel pipe 9, sound and light alarms are sent out while marking, a flaw detection waveform diagram and a flaw distribution diagram of a detection result recording diagram of each channel are simultaneously displayed during detection, when the tail of the steel pipe 9 is detected, the inner detection probe and the outer detection trolley are sequentially lifted, the rail trolley 16 and the righting gantry frame 10 carry the inner detection trolley and the outer detection trolley to move to the original point position, the material stirring device conveys the flaw detection results of the steel pipe 9 to a computer to browse and store. And repeating the operation of S5, and detecting the next steel pipe 9 to be detected until the detection of the steel pipe 9 to be detected is finished. Through the steps, the magnetic flux leakage detection of the surface quality of the steel pipe 9 is realized.
Example 3
To further explain with the embodiment 1, as shown in fig. 1 to 15, the connection structure and the working principle of the device for detecting the external surface are as follows: the steel pipe 9 is erected on a rolling roller 14, an external detection trolley 11 is arranged in a righting portal frame 10, the righting portal frame 10 and the external detection trolley 11 are connected together through an adjusting mechanism 13 capable of sliding up and down, a telescopic electric push rod 12 is arranged on the adjusting mechanism 13 and the external detection trolley 11, first sliding rails 15 are arranged on two sides of the rolling roller 14, and the righting portal frame 10 abuts against the first sliding rails 15 to slide. The driving rolling roller 14 rolls to drive the steel pipe 9 to roll, the telescopic electric push rod 12 adjusts the relative position between the outer detection trolley 11 and the steel pipe 9, so that the outer detection trolley 11 can slide on the steel pipe 9, when the outer detection probe detects, the driving rolling roller 14 rolls to drive the steel pipe 9 to roll, and meanwhile, the straightening gantry frame 10 abuts against the first sliding rail 15 to slide, and the outer detection trolley 11 also slides along the outer surface of the steel pipe 9. Therefore, the external detection probe can detect all the positions of the outer surface of the steel pipe 9, and the omission phenomenon does not exist.
The equipment connecting structure for detecting the inner surface and the working principle are as follows: the steel pipe 9 is erected on the rolling roller 14, a rail trolley 17 is installed on one side of the steel pipe 9, the inner detection trolley 16 can slide on the rail trolley 17, and a second sliding rail 18 is installed at the bottom of the rail trolley 17. When the outer detection probe detects, the rail trolley 17 moves the inner detection trolley 16 outside the steel pipe 9 into the steel pipe 9, and simultaneously drives the rolling roller 14 to roll to drive the steel pipe 9 to roll, and the rail trolley 17 slides relatively on the second slide rail 18 to drive the inner detection trolley 16 to slide towards the outside of the steel pipe relative to the steel pipe 9, so that the inner detection probe can detect all positions of the inner surface of the steel pipe 9, and no omission phenomenon exists.
The inner surface and the outer surface can be detected simultaneously or separately.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of this invention.
Claims (9)
1. A detection method of a magnetic leakage detection device calibration device for the surface quality of a steel pipe comprises the steps that the magnetic leakage detection device calibration device comprises a cylindrical pipe body calibration device, multiple artificial defects are sequentially arranged from one end to the other end of the cylindrical pipe body calibration device, and multiple artificial defects are arranged;
each artificial defect is spirally distributed around the cylindrical pipe body, and enough space is kept;
the inner surface of the cylindrical tube body is provided with artificial defects with the same size, depth and shape as the outer surface, and the positions of the artificial defects correspond to the outer surface one by one;
the detection method is characterized by comprising the following steps: s1, manufacturing a magnetic flux leakage detection equipment calibration sample tube according to requirements, and connecting a detection system;
s2, conveying the inner detection trolley (16) to the front of a calibration sample tube by using a rail trolley (17), carrying the outer detection trolley (11) by using a straightening gantry frame (10) to move from an original point position to the front of a tube head of the calibration sample tube, adjusting the inner detection trolley (16) and the outer detection trolley (11) to proper heights according to the specification of the sample tube, manually controlling the switches of the inner detection trolley (16) and the outer detection trolley (11), moving the inner detection trolley (16) into the calibration sample tube, moving the outer detection trolley (11) above the calibration sample tube, and dropping an inner detection probe of the inner detection trolley (16) and an outer detection probe of the outer detection trolley (11) onto the surface of the calibration sample tube;
s3, adjusting the detection sensitivity of the equipment: starting magnetization, electrifying the outer magnetizer, rotating the rotary tire to rotate the sample tube, positioning the artificial defect on the calibrated sample tube below the probe, finely adjusting the rotary sample tube to ensure that the amplitude of the waveform of the artificial defect detection by the probe is the highest, adjusting the gain of the instrument, adjusting the amplitude of the waveform to 50% of the full amplitude, adjusting the amplitude of the bottom wave to be lower than the amplitude of the detection waveform 10 dB and the height of the alarm gate to 50% of the full amplitude to ensure the detection effect, amplifying and filtering different detection defect flaw detection signals output by the inner detection probe and the outer detection probe without distortion, and verifying the sensitivity of the detection probes by using the generated signals;
s4, the equipment enters a position to be detected: turning off magnetization, powering off the inner magnetizer and the outer magnetizer, manually controlling the inner detection probe and the outer detection probe to be in a rising position, returning the inner detection trolley (16) to the original point position by using a rail trolley (17), carrying the outer detection trolley (11) by using a centering gantry frame (10) to return to the original point position, and conveying the sample tube to a storage position by using a kick-out tool;
s5, detecting a first pipe fitting: the steel pipe (9) to be detected is conveyed to a rotating tire through a material shifting and receiving device, the rail trolley (17) and the righting gantry frame (10) carry the inner detection trolley (16) and the outer detection trolley (11) to move to the front of the pipe head of the steel pipe to be detected and then stop moving, the steel pipe (9) starts rotating, the inner detection trolley (16) and the righting gantry frame (10) carry the outer detection trolley (11) to move forwards, the inner detection probe and the outer detection probe sequentially fall down to detect the outer surface defects of the steel pipe (9), when the threshold value exceeds the standard, the spray gun respectively marks the inner surface defects and the outer surface defects of the steel pipe (9), sound and light alarms are sent out while marking, when the tail of the steel pipe (9) is detected, the inner detection probe and the outer detection probe sequentially rise, the inner detection trolley (16) and the righting gantry frame (10) carry the inner detection trolley and the outer detection trolley to move to the original point position, the material shifting device conveys the steel pipe (9) to a pipe outlet rack, and the detection result is conveyed to a computer to be browsed and stored;
s6, repeating the operation of the step S5, and detecting the next steel pipe (9) to be detected until the detection of the steel pipe (9) to be detected is finished;
through the steps, the magnetic flux leakage detection of the surface quality of the steel pipe (9) is realized.
2. The method for detecting the calibration device of the magnetic flux leakage detection equipment for the surface quality of the steel pipe as set forth in claim 1, wherein the method comprises the following steps: the multiple artificial defects comprise a first N-shaped groove (1), a second N-shaped groove (2), a first spherical hole (3), a second spherical hole (4), a first V-shaped taper hole (5), a second V-shaped taper hole (6), a flat bottom hole (7) and an embedded artificial layering (8).
3. The method for detecting the magnetic flux leakage detection equipment calibration device of the surface quality of the steel pipe according to claim 2, which is characterized in that: the width of the first N-shaped groove (1) is not more than 0.3mm, the depths of the first N-shaped groove (1) are respectively 0 to 1mm, 1 to 2mm and 2 to 3mm, the maximum depth is not more than 3mm, the length of the first N-shaped groove (1) is three times of the width or not more than the size of the probe, and the smaller value of the two is selected.
4. The method for detecting the magnetic flux leakage detection equipment calibration device of the surface quality of the steel pipe according to claim 2, which is characterized in that: the width of the second N-shaped groove (2) is not more than 10mm, the depths of the second N-shaped groove (2) are respectively 0 to 1mm, 1 to 2mm and 2 to 3mm, the maximum depth is not more than 3mm, the length of the second N-shaped groove (2) is three times of the width or not more than the size of the probe, and the smaller value is selected.
5. The method for detecting the calibration device of the magnetic flux leakage detection equipment for the surface quality of the steel pipe as set forth in claim 2, wherein the method comprises the following steps: the diameters of the first spherical hole (3) and the second spherical hole (4) are respectively 6mm and 25mm, the outer surface of the cylinder calibration device is respectively processed to a depth of 0 to 1mm, 1 to 2mm and 2 to 3mm, and the maximum depth is not more than 3mm.
6. The method for detecting the magnetic flux leakage detection equipment calibration device of the surface quality of the steel pipe according to claim 2, which is characterized in that: the diameters of the first V-shaped taper hole (5) and the second V-shaped taper hole (6) are respectively 6mm and 25mm, the outer surface of the cylinder calibration device is respectively processed to be 0-1mm, 1-2mm and 2-3mm, and the maximum depth is not more than 3mm.
7. The method for detecting the magnetic flux leakage detection equipment calibration device of the surface quality of the steel pipe according to claim 2, which is characterized in that: the diameter of the flat-bottom hole (7) is 0.8mm, the depths of the flat-bottom hole are respectively 0-1mm, 1-2mm and 2-3mm, and the maximum depth of the flat-bottom hole is not more than 3mm.
8. The method for detecting the magnetic flux leakage detection equipment calibration device of the surface quality of the steel pipe according to claim 2, which is characterized in that: the embedded artificial layering (8) is a flat-bottom hole with the diameter of 6-25mm, the depth of the flat-bottom hole is 0-1mm, 1-2mm and 2-3mm, the maximum depth is not more than 3mm, the embedded artificial layering is filled with the same material, the gap of a layer surface is not more than 0.8mm, and the embedded artificial layering is respectively processed at the position where the distance from the near surface of the outer wall of the cylindrical calibration device is 0-1mm, 1-2mm and 2-3mm, and the maximum depth is not more than 3mm.
9. The method for detecting the calibration device of the magnetic flux leakage detection equipment for the surface quality of the steel pipe as set forth in claim 1, wherein the method comprises the following steps: a first N-shaped groove (1) and a second N-shaped groove (2) are machined by a grooving machine, a first spherical hole (3), a second spherical hole (4), a first V-shaped taper hole (5) and a second V-shaped taper hole (6) are machined by a ball-end milling cutter, and a flat bottom hole (7) and an embedded manual layering (8) are machined by a cylindrical milling cutter.
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| JP3868443B2 (en) * | 2004-09-01 | 2007-01-17 | 住友鋼管株式会社 | Ultrasonic inspection method of metal material and manufacturing method of steel pipe |
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| CN203405447U (en) * | 2013-06-20 | 2014-01-22 | 无锡西姆莱斯石油专用管制造有限公司 | Ultrasonic flaw detection sample pipe |
| CN103837594B (en) * | 2014-02-28 | 2017-01-11 | 南京航空航天大学 | Magnetic flux leakage detecting device for steel pipe and detection method thereof |
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