CN113804749B - Deep hole fluorescent imaging device for magnetic powder inspection of inner surface of steel pipe and application method of deep hole fluorescent imaging device - Google Patents
Deep hole fluorescent imaging device for magnetic powder inspection of inner surface of steel pipe and application method of deep hole fluorescent imaging device Download PDFInfo
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- CN113804749B CN113804749B CN202010540879.4A CN202010540879A CN113804749B CN 113804749 B CN113804749 B CN 113804749B CN 202010540879 A CN202010540879 A CN 202010540879A CN 113804749 B CN113804749 B CN 113804749B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 143
- 239000010959 steel Substances 0.000 title claims abstract description 143
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 54
- 238000007689 inspection Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000012632 fluorescent imaging Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 47
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 230000005284 excitation Effects 0.000 claims abstract description 12
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 238000000799 fluorescence microscopy Methods 0.000 claims abstract description 5
- 239000006249 magnetic particle Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000002950 deficient Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 6
- 230000005415 magnetization Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N21/643—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses a deep hole fluorescent imaging device for magnetic powder inspection on the inner surface of a steel pipe and a use method thereof, wherein the deep hole fluorescent imaging device comprises a magnetic yoke coil arranged on one side of a port of the steel pipe, and a core rod and a spraying device for spraying magnetic suspension to a detected part of the steel pipe are connected to the side surface of the magnetic yoke coil, which faces the port of the steel pipe; the core rod comprises a detection section positioned in the steel pipe and a reserved section positioned outside the port of the steel pipe, the reserved section is connected with the side face of the magnetic yoke coil, and an ultraviolet reflector is arranged beside the detection section; the camera and the ultraviolet light source are respectively arranged on the two opposite sides of the magnetic yoke coil, the lens of the camera faces the steel pipe port, the light emitting surface of the ultraviolet light source faces the steel pipe port, and the ultraviolet reflector and the light emitting surface of the ultraviolet light source are correspondingly arranged. Under the condition of small pipe diameter, the invention can realize stable excitation with large depth and can also perform ultraviolet irradiation and fluorescence imaging with large depth.
Description
Technical Field
The invention relates to a steel pipe magnetic powder inspection technology, in particular to a deep hole fluorescent imaging device for magnetic powder inspection of the inner surface of a steel pipe and a use method thereof.
Background
The magnetic powder inspection is an important quality inspection method for the quality of the steel pipe, a magnetic field is applied to the detected part of the steel pipe in a darkroom of a specific inspection station, then magnetic suspension is sprayed, if the detected part has surface or shallow surface defects (cracks, air holes, nonmetallic inclusions, pits and the like) and contains air or nonmetallic materials, the magnetic permeability is far smaller than that of a workpiece, the magnetic resistance changes, a leakage magnetic field is generated at the corresponding defect part on the surface or near surface of the steel pipe to form a small magnetic grade, more fluorescent magnetic powder is accumulated on the magnetic powder, and the magnetic powder is irradiated by an ultraviolet lamp to excite the magnetic powder to emit fluorescence. By means of enhancement, more accumulated magnetic powder is displayed, finally, fluorescent images are obtained, and the defects of the inner surface and the outer surface of the tiny pipe end are detected. The sensitivity of surface detection is higher than that of ultrasonic and ray detection.
The original requirement on the inner surface of the steel pipe is lower, the flaw detection range of the inner surface is small, the inner surface of the pipe is magnetized within 50mm of the inner surface of the pipe end by adopting a circumferential magnetization mode of a large coil outside the steel pipe, and when the inner surface is detected, the shielding of magnetization equipment is smaller, and enough observation space is also provided, so that the observation is clearer.
Referring to fig. 1, for magnetic particle inspection of large-diameter steel pipes in a small range, an annular coil 1 is sleeved at the end of a steel pipe 2, the steel pipe 2 is subjected to circumferential excitation, magnetic marks are generated by excitation defects, an ultraviolet light source 3 is arranged at the pipe orifice of the steel pipe 2 to drive ultraviolet light in, and the inside of the steel pipe 2 is observed through a camera 4 or naked eyes. The ultraviolet light has no internal shielding near the pipe orifice of the steel pipe 2, but the irradiation range A of the ultraviolet light is smaller in this way.
As shown in fig. 2, for large-scale magnetic particle inspection of large-diameter steel pipes, a longitudinal yoke coil excitation mode is adopted to enable an external yoke coil 5 to act on the outer surface of the steel pipe 2, and an internal yoke coil 6 to act on the inner surface of the steel pipe 2, so long as the caliber of the steel pipe 2 is large enough, a certain gap is reserved to enable ultraviolet light of the ultraviolet light source 3 to enter, and the inside of the steel pipe 2 is observed through a camera 4 or naked eyes.
As shown in fig. 3, for the large-scale magnetic particle inspection of small-diameter steel pipes, if the longitudinal yoke coil excitation method is continuously adopted, the external yoke coil 5 acts on the outer surface of the steel pipe 2, the internal yoke coil 6 acts on the inner surface of the steel pipe 2, and if the caliber of the steel pipe 2 is small to a certain extent, the internal yoke coil 6 blocks the inner wall of the steel pipe 2 completely, so that the ultraviolet light of the ultraviolet light source 3 cannot enter the steel pipe 2, and the inside of the steel pipe 2 cannot be observed by the camera 4 or naked eyes.
As the quality requirements on steel pipe products are continuously improved at present, the detection range of 300mm of flaw detection is needed for the inner surface of the pipe end. As shown in fig. 4, in order to better magnetize the inner surface of the steel pipe 2, the magnetic powder inspection machine adopted at present strengthens the magnetizing equipment thereof, and adopts a compound magnetization mode, namely an excitation mode that the inner surface uses a magnetic yoke coil 7 and a core rod 8 to guide a magnetic field.
The magnetic yoke coil 7 and the core rod 8 are adopted to perform magnetic powder flaw detection imaging on the inner surface of the steel pipe 2, so that the magnetic powder flaw detection imaging has a large shielding and interference phenomenon. When the caliber of the produced steel pipe 2 is smaller and the working range to be measured is larger, the measured steel pipe 2 cannot be magnetized in the response range, and the ultraviolet light of the ultraviolet light source 3 is irradiated and visualized or imaged and detected by the camera 4. If the traditional circumferential magnetization method is adopted, a large pipe end depth range cannot be covered; when the yoke coil 7 and the core rod 8 of the magnetization reinforcing device are used, the end depth range of the tube is solved, but the yoke coil 7 and the core rod 8 occupy the light path on the inner surface of the steel tube 2, and ultraviolet light cannot be irradiated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the magnetic powder flaw detection deep hole fluorescent imaging device for the inner surface of the steel pipe and the application method thereof, which can realize stable excitation with large depth and ultraviolet irradiation and fluorescent imaging with large depth under the condition of small pipe diameter.
In order to achieve the above purpose, the invention adopts the following technical scheme:
on one hand, the magnetic powder inspection deep hole fluorescence imaging device on the inner surface of the steel pipe comprises a magnetic yoke coil arranged on one side of a port of the steel pipe, a core rod is connected to the side surface of the magnetic yoke coil, which faces the port of the steel pipe, and a spraying device for spraying magnetic suspension to a tested part of the steel pipe;
the core rod comprises a detection section positioned in the steel pipe and a reserved section positioned outside the port of the steel pipe, the reserved section is connected with the side face of the magnetic yoke coil, and an ultraviolet reflector is arranged beside the detection section;
the camera and the ultraviolet light source are respectively arranged on the two opposite sides of the magnetic yoke coil, the lens of the camera faces the steel pipe port, the light emitting surface of the ultraviolet light source faces the steel pipe port, and the ultraviolet reflector and the light emitting surface of the ultraviolet light source are correspondingly arranged.
Preferably, the yoke coil is mounted on the yoke base.
Preferably, the camera is arranged above the magnetic yoke coil.
Preferably, the ultraviolet light source is bowl-shaped or plane-shaped.
Preferably, the length of the reserved segment is obtained according to the following relation:
the length of the reserved section=the height of the part of the lens of the camera, which is shielded by the yoke coil, facing the side face of the steel pipe port, and the part exceeding the inner diameter of the steel pipe is x (half of the inner diameter of the steel pipe+half of the width of the yoke coil facing the side face of the steel pipe port).
Preferably, the length of the reserved segment is obtained according to the following relation:
a portion of the lens of the camera that is not shielded by the yoke coil+a portion of the lens of the camera that is shielded by the yoke coil.
On the other hand, the application method of the deep hole fluorescent imaging device for the magnetic powder inspection on the inner surface of the steel pipe comprises a debugging working process and a magnetic powder inspection working process;
the debugging working process is to install and adjust the magnetic powder inspection deep hole fluorescent imaging device on the inner surface of the steel pipe in place, and prepare magnetic powder inspection work;
the magnetic powder inspection working process is that the magnetic powder inspection deep hole fluorescent imaging device for the inner surface of the steel pipe is adopted to carry out the magnetic powder inspection work on the steel pipe in the production process;
preferably, the debugging working process comprises the following steps:
1) The magnetic yoke coil is arranged on the magnetic yoke base, and the length of the reserved section is calculated;
2) Installing the camera on one side of the magnetic yoke coil, and adjusting the position and angle of the camera;
3) The ultraviolet reflector is arranged beside the detection section, and the ultraviolet light source is arranged on the other side edge of the magnetic yoke coil;
4) And adjusting the position and the included angle of the ultraviolet reflector to enable ultraviolet rays emitted by the ultraviolet light source to irradiate the measured position through the ultraviolet reflector.
Preferably, the magnetic powder inspection working process comprises the following steps:
1) After the steel pipe is in place, starting the steel pipe to rotate, enabling the magnetic yoke coil to flow current to start excitation work, enabling the core rod to transfer a magnetic field to the steel pipe, spraying magnetic suspension liquid to a tested part on the steel pipe by the spraying device, and generating magnetic marks if the steel pipe is defective;
2) Ultraviolet rays emitted by the ultraviolet light source are irradiated to a tested position through the ultraviolet reflector, magnetic marks are excited to generate fluorescence, and then a flaw detection image is obtained by the camera;
3) And after the whole steel pipe rotates for one circle and a related flaw detection image is obtained, ending the magnetic powder flaw detection working process.
According to the technical scheme, the deep hole fluorescent imaging device for the magnetic powder inspection on the inner surface of the steel pipe and the using method thereof, provided by the invention, are used for reasonably arranging main components of a magnetic powder inspection machine, namely the magnetic yoke coil, the core rod, the spraying device, the ultraviolet light source, the camera and the ultraviolet reflector, and organically combining together, so that under the condition of small pipe diameter, the stable excitation of large depth can be realized, the ultraviolet irradiation and fluorescent imaging of large depth can be also realized, the mechanical reliability of the device is relatively good, and finally the on-line magnetic powder inspection of the pipe end of the small-caliber steel pipe with large depth can be stably realized. The working range of the end of the steel pipe can be very large, and images with good quality can be formed. The device can realize the simultaneous coordination of the devices at the two ends of the magnetic yoke, and achieves the effect that manual operation cannot be realized. By the device and the method, the flaw detection range of more than 300mm of the inner surface of the pipe end is stably observed under the condition of different pipe diameters, and the strictest production technical requirements are met.
Drawings
FIG. 1 is a schematic diagram of magnetic particle inspection detection of a small range of a conventional large-diameter steel pipe;
fig. 2 is a schematic diagram of a large-range magnetic particle inspection of a conventional large-diameter steel pipe;
FIG. 3 is a schematic diagram of a large-scale magnetic particle inspection of a conventional small-diameter steel pipe;
FIG. 4 is a schematic diagram of a prior art magnetic particle inspection machine employing a composite magnetization;
FIG. 5 is a schematic top view of an embodiment of the apparatus of the present invention;
FIG. 6 is a schematic side view of an embodiment of the apparatus of the present invention;
fig. 7 is a diagram of the geometric relationship between the components in an embodiment of the device of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 5 to 6, the present invention provides a deep hole fluorescent imaging device for magnetic powder inspection on the inner surface of a steel pipe, which comprises a yoke base 11 installed on one side of a port of the steel pipe 10, a yoke coil 12 installed on the yoke base 11, and a core rod 13 connected to the side of the yoke coil 12 facing the port of the steel pipe 10.
The core rod 13 includes a detection section (e.g., a broken line portion inside the steel pipe 10 in fig. 5) inside the steel pipe 10, and a reserve section (e.g., a solid line portion outside the steel pipe 10 in fig. 5) outside the port of the steel pipe 10, the reserve section being connected to the side face of the yoke coil 12, and an ultraviolet mirror 14 being provided beside the detection section.
The camera 15 and the ultraviolet light source 16 are respectively installed on two opposite sides of the magnetic yoke coil 12, the lens of the camera 15 is arranged towards the port of the steel pipe 10, the light emitting surface of the ultraviolet light source 16 is arranged towards the port of the steel pipe 10, and the ultraviolet reflector 14 and the light emitting surface of the ultraviolet light source 16 are correspondingly arranged.
And also comprises a spraying device for spraying the magnetic suspension to the measured part of the steel pipe 10.
The installation position of the ultraviolet reflector 14 needs to be reasonably arranged, and ultraviolet light generated by the bowl-shaped or plane-shaped ultraviolet light source 16 can be reflected by the ultraviolet reflector 14 and can irradiate the surface to be measured of the inner wall of the steel pipe 10, and the most proximal end and the most distal end can be uniformly irradiated by the ultraviolet light.
The size of the ultraviolet reflector 14 can be optimized as required as follows:
1) The ultraviolet reflector 14 is closer to the yoke coil 12, and can reflect the light emitted by the ultraviolet light source 16 far away from the yoke coil 12 to the end position of the steel pipe 10;
2) The ultraviolet reflector 14 is located at a far end from the yoke coil 12, and can reflect light emitted from the ultraviolet light source 16 near the yoke coil 12 into the deep inside of the steel pipe 10.
The ultraviolet mirror 14 can be optimized for its position and size as described above; the ultraviolet mirror 14 may be simply set to the through length of the yoke coil 12, and the entire ultraviolet light may be reflected to the detection site.
In actual production, the lower limit of the size of the steel pipe 10 has smaller diameter, and the diameter of the core rod 13 is smaller because of the larger size of the magnetic yoke coil 12, so that the length of the core rod 13 is prolonged, and the outward movement of the magnetic yoke coil 12 can lead the observation dead angles of the camera 15 and human eyes to be smaller. However, the excessively long core rod 13 affects not only the magnetic conduction effect, but also the structural strength and the service life of the flaw detection equipment, and affects the layout and the use convenience of the flaw detection equipment.
In the overall layout of the flaw detection apparatus, the core rod 13 is usually stuck to the upper position of the inner wall of the steel pipe 10, the camera 15 cannot be arranged below the yoke coil 12, the lower position is easily eroded by the magnetic suspension, and the influence of the yoke base 11 is also exerted. And even less so, above the yoke coil 12, will be completely shielded by the core rod 13. Only the horizontal plane of the center of the steel pipe 10 can be arranged and directed to the opposite side of the steel pipe 10, and a good field of view is formed within a certain depth of the inner wall of the opposite side steel pipe 10.
Referring to fig. 7, the following geometrical relationships between the components in the device of the present invention are shown:
EF is the field of view of the inner surface of the steel pipe 10;
BF is the minimum inner diameter of the steel pipe 10;
BD. FG is the length of the reserved section of the mandrel 13;
the length of AG is equal to half of the inner diameter of the steel pipe 10 plus half of the width of the yoke coil 12;
AD is the length of the yoke coil 12 beyond the portion of the steel pipe 10;
CD is the portion of the lens of the camera 15 that is blocked by the yoke coil 12;
BC is a portion of the lens of the camera 15 that is not shielded by the yoke coil 12;
h is the vertical height (half width) from the center point of the lens of the camera 15 to the bottom of the camera 15.
CD＝FG/AG×AD；
BC＝BD-CD；
EF＝BC/(AD+h)×(AG+h)。
For example: for the steel pipe with the minimum pipe diameter of 219mm, the length 273mm of the reserved section of the core rod, the side length of the magnetic yoke coil is 300mm, the half width of the camera is 50mm, the expected detection range is 300mm, and then:
BF＝219mm
FG＝273mm
AD＝(300-219)/2＝40.5mm
AG＝BF+AD＝219+40.5＝259.5mm
BC＝219/259.5×273＝230.393mm
EF＝230.393/(40.5+50)×(259.5+50)＝787.919mm
that is, the detected detection range is 787.919mm, the requirement of 300mm detection range is met, and the camera is allowed to have proper deviation due to larger redundancy.
An ultraviolet light source 16 is disposed beside the yoke coil 12 at a position symmetrical to the camera 15, and an ultraviolet mirror 14 is disposed above the detection section of the core rod 13. If there is enough space, the ultraviolet reflector 14 can be equal in length with the core rod 13; if the space is insufficient, the length of the ultraviolet mirror 14 can be appropriately shortened as long as the ultraviolet light can be sufficiently reflected to the detected position.
By properly adjusting the included angle between the ultraviolet reflector 14 and the horizontal plane, ultraviolet light can be better reflected to the surface to be measured inside the steel pipe 10.
The invention also provides a use method of the magnetic powder inspection deep hole fluorescence imaging device for the inner surface of the steel pipe, which comprises a debugging working process and a magnetic powder inspection working process;
the debugging process is to install and adjust each part of the device in place and prepare magnetic powder inspection work;
the magnetic powder inspection work process is that the adopted device performs magnetic powder inspection work on the steel pipe in the production process;
the device comprises a magnetic yoke coil 12 arranged at one side of the port of the steel pipe 10, and a core rod 13 is connected to the side surface of the magnetic yoke coil 12 facing the port of the steel pipe 10;
the core rod 13 comprises a detection section positioned in the steel pipe 10 and a reserved section positioned outside the port of the steel pipe 10, the reserved section is connected with the side surface of the magnetic yoke coil 12, and an ultraviolet reflector 14 is arranged beside the detection section;
the camera 15 and the ultraviolet light source 16 are respectively arranged on the two opposite sides of the magnetic yoke coil 12, the lens of the camera 15 is arranged towards the port of the steel pipe 10, the light emitting surface of the ultraviolet light source 16 is arranged towards the port of the steel pipe 10, and the ultraviolet reflector 14 and the light emitting surface of the ultraviolet light source 16 are correspondingly arranged;
also comprises a spraying device.
The debugging working process comprises the following steps:
1) The method comprises the steps that a magnet yoke coil 12 is arranged on a magnet yoke base 11, and the length of a reserved section is calculated to meet the specified flaw detection range; however, too long is not necessary to ensure the magnetic conduction effect of the core rod 13 and the structural strength of the device;
2) A camera 15 is arranged on one side of the magnetic yoke coil 12, and the position and the angle of the camera 15 are adjusted so that the camera 15 can cover a range to be measured;
3) An ultraviolet reflector 14 is arranged beside the detection section, and an ultraviolet light source 16 is arranged on the other side of the magnetic yoke coil;
4) The position and angle of the ultraviolet reflector 14 are adjusted so that the ultraviolet rays emitted by the ultraviolet light source 16 can be irradiated to the measured position through the ultraviolet reflector 14.
The working process of the magnetic powder inspection comprises the following steps:
1) After the steel pipe 10 is in place, the steel pipe 10 is started to rotate, the magnetic yoke coil 12 is electrified to start excitation work, the core rod 13 transmits a magnetic field to the steel pipe 10, a spraying device sprays magnetic suspension to a tested part on the steel pipe 10, and if the steel pipe 10 has defects, magnetic marks can be generated;
2) Ultraviolet rays emitted by an ultraviolet light source 16 are irradiated to a detected position in the steel pipe 10 through an ultraviolet reflector 14, magnetic marks are excited to generate fluorescence, and then a flaw detection image is obtained through a camera 15;
3) After the whole steel pipe 10 rotates for one circle and the related flaw detection image is obtained, the magnetic powder flaw detection working process is finished.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.
Claims (4)
1. The utility model provides a steel pipe internal surface magnetic particle inspection deep hole fluorescence imaging device which characterized in that: the magnetic yoke coil is arranged at one side of the port of the steel pipe, and the side surface of the magnetic yoke coil facing the port of the steel pipe is connected with a core rod and a spraying device for spraying magnetic suspension to the tested part of the steel pipe;
the core rod comprises a detection section positioned in the steel pipe and a reserved section positioned outside the port of the steel pipe, the reserved section is connected with the side face of the magnetic yoke coil, and an ultraviolet reflector is arranged beside the detection section;
the two opposite sides of the magnetic yoke coil are respectively provided with a camera and an ultraviolet light source, the lens of the camera is arranged towards the steel pipe port, the light emitting surface of the ultraviolet light source is arranged towards the steel pipe port, the ultraviolet reflector is correspondingly arranged with the light emitting surface of the ultraviolet light source,
the yoke coil is mounted on the yoke base,
the camera is arranged above the magnetic yoke coil,
the length of the reserved segment is obtained according to the following relation:
the length of the reserved section=the height of the part of the lens of the camera, which is shielded by the yoke coil, facing the side of the steel pipe port, and the part exceeding the inner diameter of the steel pipe x (half of the inner diameter of the steel pipe + half of the width of the yoke coil facing the side of the steel pipe port), or
A portion of the lens of the camera that is not shielded by the yoke coil + a portion of the lens of the camera that is shielded by the yoke coil,
the use of the magnetic powder flaw detection deep hole fluorescence imaging device on the inner surface of the steel pipe comprises a debugging working process and a magnetic powder flaw detection working process;
the debugging working process is to install and adjust the magnetic powder inspection deep hole fluorescent imaging device on the inner surface of the steel pipe in place, and prepare magnetic powder inspection work;
the magnetic powder inspection working process is to adopt the magnetic powder inspection deep hole fluorescent imaging device for the inner surface of the steel pipe to carry out the magnetic powder inspection work on the steel pipe in the production process,
the debugging working process comprises the following steps:
1) The magnetic yoke coil is arranged on the magnetic yoke base, and the length of the reserved section is calculated;
2) Installing the camera on one side of the magnetic yoke coil, and adjusting the position and angle of the camera;
3) The ultraviolet reflector is arranged beside the detection section, and the ultraviolet light source is arranged on the other side edge of the magnetic yoke coil;
4) The position and the included angle of the ultraviolet reflector are adjusted to enable ultraviolet rays emitted by the ultraviolet light source to irradiate to a measured position through the ultraviolet reflector,
the magnetic powder inspection working process comprises the following steps:
1) After the steel pipe is in place, starting the steel pipe to rotate, enabling the magnetic yoke coil to flow current to start excitation work, enabling the core rod to transfer a magnetic field to the steel pipe, spraying magnetic suspension liquid to a tested part on the steel pipe by the spraying device, and generating magnetic marks if the steel pipe is defective;
2) Ultraviolet rays emitted by the ultraviolet light source are irradiated to a tested position through the ultraviolet reflector, magnetic marks are excited to generate fluorescence, and then a flaw detection image is obtained by the camera;
3) And after the whole steel pipe rotates for one circle and a related flaw detection image is obtained, ending the magnetic powder flaw detection working process.
2. The deep hole fluorescent imaging device for magnetic particle inspection of the inner surface of a steel pipe according to claim 1, wherein: the ultraviolet light source is bowl-shaped or plane-shaped.
3. The deep hole fluorescent imaging device for magnetic particle inspection of the inner surface of a steel pipe according to claim 1, wherein: the length of the reserved segment is obtained according to the following relation:
a portion of the lens of the camera that is not shielded by the yoke coil+a portion of the lens of the camera that is shielded by the yoke coil.
4. The application method of the deep hole fluorescent imaging device for the magnetic powder inspection of the inner surface of the steel pipe is characterized by comprising the following steps: the method comprises a debugging working process and a magnetic powder inspection working process;
the debugging working process is to install and adjust the magnetic powder inspection deep hole fluorescent imaging device on the inner surface of the steel pipe according to any one of claims 1-2 in place, and prepare magnetic powder inspection work;
the magnetic powder inspection working process is to adopt the magnetic powder inspection deep hole fluorescent imaging device for the inner surface of the steel pipe according to any one of claims 1-2 to carry out the magnetic powder inspection working on the steel pipe in the production process,
the debugging working process comprises the following steps:
1) The magnetic yoke coil is arranged on the magnetic yoke base, and the length of the reserved section is calculated;
2) Installing the camera on one side of the magnetic yoke coil, and adjusting the position and angle of the camera;
3) The ultraviolet reflector is arranged beside the detection section, and the ultraviolet light source is arranged on the other side edge of the magnetic yoke coil;
4) The position and the included angle of the ultraviolet reflector are adjusted to enable ultraviolet rays emitted by the ultraviolet light source to irradiate to a measured position through the ultraviolet reflector,
the magnetic powder inspection working process comprises the following steps:
1) After the steel pipe is in place, starting the steel pipe to rotate, enabling the magnetic yoke coil to flow current to start excitation work, enabling the core rod to transfer a magnetic field to the steel pipe, spraying magnetic suspension liquid to a tested part on the steel pipe by the spraying device, and generating magnetic marks if the steel pipe is defective;
2) Ultraviolet rays emitted by the ultraviolet light source are irradiated to a tested position through the ultraviolet reflector, magnetic marks are excited to generate fluorescence, and then a flaw detection image is obtained by the camera;
3) And after the whole steel pipe rotates for one circle and a related flaw detection image is obtained, ending the magnetic powder flaw detection working process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010540879.4A CN113804749B (en) | 2020-06-15 | 2020-06-15 | Deep hole fluorescent imaging device for magnetic powder inspection of inner surface of steel pipe and application method of deep hole fluorescent imaging device |
Applications Claiming Priority (1)
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