CN110568062B - Magnetic particle testing equipment for circumferential defects of inner wall of hole - Google Patents
Magnetic particle testing equipment for circumferential defects of inner wall of hole Download PDFInfo
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- CN110568062B CN110568062B CN201910873361.XA CN201910873361A CN110568062B CN 110568062 B CN110568062 B CN 110568062B CN 201910873361 A CN201910873361 A CN 201910873361A CN 110568062 B CN110568062 B CN 110568062B
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- 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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Abstract
The invention discloses a magnetic powder detection device for circumferential defects of the inner wall of a hole, which comprises a tube body and a fixed block, wherein a fixed tube is arranged in the tube body, an inner tube is arranged in the fixed tube, the inner tube and the fixed tube are fixed through a nozzle, the right side of the inner tube is wrapped with an installation block, a connection cavity is formed in the right end of the installation block, a fixed bearing is fixedly connected in the connection cavity, a working tube is arranged in an insertion tube, a limit block is fixedly connected at the right end of the working tube, a communicating tube is arranged in a shell, the right end of the communicating tube is communicated with an outlet of a pump body, an inlet of the pump body is communicated with a magnetic suspension tube, and the pump body is fixed in the shell through a base. The magnetic powder detection equipment for the circumferential defects of the inner wall of the hole has the characteristics that a magnetic field can be generated in the excitation coil to magnetize magnetic powder, the magnetic powder can be gathered at the defect position after the magnetization is finished, a magnetic powder pattern is formed, and the circumferential defects of the inner wall of the hole can be visually reflected.
Description
Technical Field
The invention relates to the technical field of nondestructive testing of pipelines, in particular to magnetic powder testing equipment for circumferential defects of the inner wall of a hole.
Background
The magnetic powder detection technology is used for identifying defects such as cracks, hairlines, air holes, inclusions and folds on the surface and near surface of a ferromagnetic workpiece under the condition of not damaging the detected workpiece, has high detection sensitivity, can directly display the shape and position information of the defects, and has visual detection result and low detection cost; at present, the ultrasonic detection technology is industrially used for detecting the condition of the inner wall of a small pipeline, the ultrasonic penetration capacity is strong, the detection rate and the precision for detecting the crack defects with the wall thickness of more than 4mm and the thickness of more than 0.5mm in a detected piece are high, but the detection rate for the micron-sized crack defects on the surface of the pipe wall is low.
In order to overcome the defects in the existing market, the technology of improving the magnetic powder detection device is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problems that the ultrasonic detection technology is used for detecting the inner wall of a small pipeline in the prior art, the ultrasonic penetration capacity is strong, the detectable rate of crack defects larger than 0.5mm in a detected piece with the wall thickness larger than 4mm is high, the precision is high, and the detectable rate of micron-sized crack defects on the surface of the pipe wall is low, and provides the magnetic powder detection equipment for the circumferential defects of the inner wall of a hole. The installation block, the magnet exciting coil and the fixed bearing have the advantages that a magnetic field can be generated in the magnet exciting coil, magnetic powder is magnetized, the magnetic powder can be gathered at a defect position after the magnetization is finished, a magnetic powder pattern is formed, and circumferential defects of the inner wall of the hole can be reflected visually.
In order to achieve the purpose, the invention provides the following technical scheme: a magnetic particle testing device for circumferential defects of the inner wall of a hole comprises a tube body and a fixed block, wherein a fixed tube is arranged in the tube body, an inner tube is arranged in the fixed tube, the inner tube and the fixed tube are fixed through a nozzle, an installation block wraps the right side of the inner tube, a connection cavity is formed in the right end of the installation block, a fixed bearing is fixedly connected in the connection cavity, a working tube is arranged in an insertion tube, a limit block is fixedly connected to the right end of the working tube, a communicating tube is formed in the shell, the right end of the communicating tube is communicated with an outlet of a pump body, an inlet of the pump body is communicated with a magnetic suspension tube, and the pump body is fixed in the shell through a base; the shell is provided with a handle;
fixed block and casing fixed connection, and the inside mounting groove of having seted up of fixed block, the internal portion of pegging graft installs the body of rod, and the internal portion right side of pegging graft installs the panel, and the winding of body of rod left side has excitation coil simultaneously.
Preferably, the fixed pipe is arranged in the inner wall of the pipe hole in the pipe body, eight groups of nozzles are mounted on the fixed pipe, and the eight groups of nozzles are uniformly arranged along the circumferential position of the fixed pipe.
Preferably, the nozzle is communicated with the communicating pipe through the inner pipe and the working pipe, and the nozzle is of a rotating structure.
Preferably, the inner part of the right end of the mounting block is fixed with an outer ring of the fixed bearing, and the working pipe passes through an inner ring of the fixed bearing and is arranged inside the inner pipe.
Preferably, the working pipe is inserted in the insertion pipe through the sealing ring, the working pipe is of a telescopic structure, and the working pipe and the sealing ring are of a concentric structure.
Preferably, the pump body is communicated with an external magnetic suspension liquid tank through a magnetic suspension liquid pipe, and the pump body is electrically connected with the switch button.
Preferably, the circumference position of the plug block evenly sets up four groups of locating pieces, and the inside circumference position of mounting groove evenly sets up four groups of constant head tanks, and the plug block passes through the locating piece simultaneously and pegs graft in the constant head tank.
Preferably, the excitation coil is electrically connected with the battery panel, the rod body is inserted into the insertion block, and the rod body is of a telescopic structure; after the magnetic suspension is sprayed on the inner wall of the pipe hole in the circumferential direction, the battery board provides direct current for the magnet exciting coil, a magnetic field can be generated in the magnet exciting coil at the moment, magnetic powder is magnetized, the magnetic powder can be gathered at the defect position after the magnetization is finished, a magnetic powder pattern is formed, and the circumferential defect of the inner wall of the pipe hole can be visually reflected.
Compared with the prior art, the invention has the beneficial effects that:
1. the battery plate provides direct current for the excitation coil, a magnetic field can be generated in the excitation coil at the moment to magnetize magnetic powder, and the magnetic powder can be gathered at the defect after the magnetization is finished to form a magnetic powder pattern which can visually reflect the circumferential defects of the inner wall of the hole;
2. the magnet exciting coil is a precise instrument, and when the magnet exciting coil is idle, the inserting block can be taken out and independently stored, so that the service life of the magnet exciting coil is ensured;
3. the circumferential position of nozzle along fixed pipe evenly sets up to eight groups, guarantees that the nozzle can be with even the spraying of magnetic suspension on the circumferential position of tube hole inner wall.
Drawings
FIG. 1 is a schematic front view of the structure of the present invention;
FIG. 2 isbase:Sub>A schematic cross-sectional view ofbase:Sub>A structure A-A of the present invention;
FIG. 3 is a schematic view of a structural joint chamber of the present invention;
FIG. 4 is a schematic cross-sectional view of a structural mounting block of the present invention;
FIG. 5 is a schematic view of a positioning block of the present invention.
The reference numbers in the figures: 1. a pipe body; 2. the inner wall of the pipe hole; 3. a fixed tube; 4. a nozzle; 5. an inner tube; 6. mounting blocks; 7. a working pipe; 8. fixing the bearing; 9. inserting a tube; 10. a seal ring; 11. a limiting block; 12. a communicating pipe; 13. a pump body; 14. a magnetic suspension tube; 15. a switch button; 16. a housing; 17. a handle; 18. a fixed block; 19. mounting grooves; 20. an insertion block; 21. a battery panel; 22. a rod body; 23. a field coil; 24. positioning a groove; 25. positioning a block; 26. a connecting cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a magnetic powder detection device for circumferential defects of the inner wall of a hole comprises a tube body 1 and a fixed block 18, wherein a fixed tube 3 is arranged in the tube body 1, an inner tube 5 is arranged inside the fixed tube 3, meanwhile, the inner tube 5 and the fixed tube 3 are fixed through nozzles 4, the fixed tube 3 is arranged in the inner wall 2 of the hole in the tube body 1, eight groups of nozzles 4 are arranged on the fixed tube 3, and meanwhile, the eight groups of nozzles 4 are uniformly arranged along the circumferential position of the fixed tube 3; the nozzle 4 is communicated with the communicating pipe 12 through the inner pipe 5 and the working pipe 7, and the nozzle 4 is of a rotary structure; the right side of the inner pipe 5 is wrapped with the mounting block 6, a connecting cavity 26 is formed in the right end of the mounting block 6, a fixed bearing 8 is fixedly connected in the connecting cavity 26, the inner portion of the right end of the mounting block 6 is fixed with the outer ring of the fixed bearing 8, and the working pipe 7 penetrates through the inner ring of the fixed bearing 8 and is arranged in the inner pipe 5; the working pipe 7 is arranged in the insertion pipe 9, the right end of the working pipe 7 is fixedly connected with a limiting block 11, the working pipe 7 is inserted in the insertion pipe 9 through a sealing ring 10, the working pipe 7 is of a telescopic structure, and meanwhile the working pipe 7 and the sealing ring 10 are of concentric circle structures; a communicating pipe 12 is arranged in the shell 16, the right end of the communicating pipe 12 is communicated with the outlet of the pump body 13, the inlet of the pump body 13 is communicated with the magnetic suspension pipe 14, and the pump body 13 is fixed in the shell 16 through a base; a handle 17 is arranged on the shell 16; the pump body 13 is communicated with an external magnetic suspension liquid tank through a magnetic suspension liquid pipe 14, and the pump body 13 is electrically connected with a switch button 15; the fixed block 18 is fixedly connected with the shell 16, an installation groove 19 is formed in the fixed block 18, a rod body 22 is installed in the insertion block 20, a battery panel 21 is installed on the right side in the insertion block 20, and meanwhile the excitation coil 23 is wound on the left side of the rod body 22; four groups of positioning blocks 25 are uniformly arranged at the circumferential position of the insertion block 20, four groups of positioning grooves 24 are uniformly arranged at the circumferential position in the installation groove 19, and the insertion block 20 is inserted in the positioning grooves 24 through the positioning blocks 25; the excitation coil 23 is electrically connected with the battery panel 21, the rod body 22 is inserted in the insertion block 20, and the rod body 22 is of a telescopic structure;
the rod body 22 is inserted into the insertion block 20, the insertion block 20 is inserted into the installation groove 19 through the positioning block 25, the magnet exciting coil 23 is a precision instrument, and when the device is idle, the insertion block 20 can be taken out and independently stored, so that the service life of the magnet exciting coil 23 is ensured;
after the magnetic suspension is circumferentially sprayed in the inner wall 2 of the pipe hole, the battery plate 21 provides direct current for the excitation coil 23, a magnetic field can be generated in the excitation coil 23 at the moment to magnetize magnetic powder, and the magnetic powder can be gathered at the defect position after magnetization is completed to form a magnetic powder pattern which can visually reflect the circumferential defect of the inner wall of the hole; the pump body 13 is 7V12C85R37; in the above embodiments, the pump body 13, the switch button 15 and the excitation coil 23 are all common elements used by those skilled in the art, and are well-known in the art, and in the above embodiments, only the pump body 13, the switch button 15 and the excitation coil 23 are used, and the functions and structures thereof are not changed, and the connection relationship of the control circuit thereof is not changed in the present embodiment.
When the magnetic powder detection equipment for circumferential defects of the inner wall of the hole is used, the handle 17 is held by hand, the fixed pipe 3 extends into the inner wall 2 of the hole, the pump body 13 ejects external magnetic suspension from the nozzle 4 through the communicating pipe 12, the working pipe 7 and the inner pipe 5 by starting the switch button 15 of the pump body 13, the mounting block 6 is rotated at the moment, the mounting block 6 drives the nozzle 4 to rotate under the action of the fixed bearing 8, the magnetic suspension is uniformly sprayed on the circumferential position of the inner wall 2 of the hole, the working pipe 7 is telescopically inserted into the insertion pipe 9, the length of the fixed pipe 3 can be adjusted according to the length of the pipe body 1, after the magnetic suspension is sprayed on the inner wall 2 of the hole, the fixed pipe 3 is extracted, the rod body 22 is inserted into the inner wall 2 of the hole, the excitation coil 23 generates a magnetic field to magnetize magnetic powder, the magnetic powder can be gathered at the defect after the magnetization is completed, a magnetic powder pattern is formed, and the magnetized defect part is shot by a camera and light source equipment, which belongs to the prior art and is described repeatedly; the whole working process of the magnetic particle testing equipment for the circumferential defects of the inner wall of the hole is realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a magnetic particle testing equipment of hole inner wall circumference defect, includes body (1) and fixed block (18), its characterized in that: the novel nozzle is characterized in that a fixed pipe (3) is arranged in the pipe body (1), an inner pipe (5) is arranged in the fixed pipe (3), meanwhile, the inner pipe (5) and the fixed pipe (3) are fixed through a nozzle (4), the fixed pipe (3) is arranged in the inner wall (2) of a pipe hole in the pipe body (1), eight groups of nozzles (4) are arranged on the fixed pipe (3), and meanwhile, the eight groups of nozzles (4) are uniformly arranged along the circumferential position of the fixed pipe (3); the nozzle (4) is communicated with the working pipe (7) and the communicating pipe (12) through the inner pipe (5), and the nozzle (4) is of a rotary structure; the right side of the inner pipe (5) is wrapped with the mounting block (6), a connecting cavity (26) is formed in the right end of the mounting block (6), a fixed bearing (8) is fixedly connected in the connecting cavity (26), a working pipe (7) is mounted in the insertion pipe (9), a limiting block (11) is fixedly connected at the right end of the working pipe (7), a communicating pipe (12) is formed in the shell (16), the right end of the communicating pipe (12) is communicated with an outlet of the pump body (13), an inlet of the pump body (13) is communicated with the magnetic suspension pipe (14), and the pump body (13) is fixed in the shell (16) through a base; a handle (17) is arranged on the shell (16);
fixed block (18) and casing (16) fixed connection, and fixed block (18) inside has seted up mounting groove (19), and the inside body of rod (22) of installing of grafting piece (20), and the inside right side of grafting piece (20) installs panel (21), and the winding has excitation coil (23) in the left side of the body of rod (22) simultaneously.
2. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the inner part of the right end of the mounting block (6) is fixed with the outer ring of the fixed bearing (8), and the working pipe (7) penetrates through the inner ring of the fixed bearing (8) and is arranged inside the inner pipe (5).
3. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the working pipe (7) is inserted in the insertion pipe (9) through the sealing ring (10), the working pipe (7) is of a telescopic structure, and meanwhile the working pipe (7) and the sealing ring (10) are of concentric circle structures.
4. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the pump body (13) is communicated with an external magnetic suspension liquid tank through a magnetic suspension liquid pipe (14), and the pump body (13) is electrically connected with the switch button (15).
5. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the circumference position of grafting piece (20) evenly sets up four groups locating piece (25), and the inside circumference position of mounting groove (19) evenly sets up four groups constant head tank (24), and grafting piece (20) are pegged graft in constant head tank (24) through locating piece (25) simultaneously.
6. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the excitation coil (23) is electrically connected with the battery panel (21), the rod body (22) is inserted in the insertion block (20), and the rod body (22) is of a telescopic structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910873361.XA CN110568062B (en) | 2019-09-17 | 2019-09-17 | Magnetic particle testing equipment for circumferential defects of inner wall of hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910873361.XA CN110568062B (en) | 2019-09-17 | 2019-09-17 | Magnetic particle testing equipment for circumferential defects of inner wall of hole |
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| Publication Number | Publication Date |
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| CN110568062A CN110568062A (en) | 2019-12-13 |
| CN110568062B true CN110568062B (en) | 2023-01-31 |
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| CN201910873361.XA Active CN110568062B (en) | 2019-09-17 | 2019-09-17 | Magnetic particle testing equipment for circumferential defects of inner wall of hole |
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| CN113915533A (en) * | 2021-04-19 | 2022-01-11 | 北京化工大学 | Axial alignment pipeline detection robot |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB547714A (en) * | 1941-05-12 | 1942-09-08 | Alan Marsh Armour | Improvements in or relating to the detection of variation in wall thickness of tubes of magnetic material |
| US4292589A (en) * | 1979-05-09 | 1981-09-29 | Schlumberger Technology Corporation | Eddy current method and apparatus for inspecting ferromagnetic tubular members |
| JPH0648262B2 (en) * | 1987-04-07 | 1994-06-22 | 日本鋼管株式会社 | Magnetic particle flaw detector |
| JP2579324Y2 (en) * | 1992-10-19 | 1998-08-27 | 日本鋼管株式会社 | Magnetic particle flaw detector |
| JPH09304349A (en) * | 1996-05-21 | 1997-11-28 | Japan Aircraft Mfg Co Ltd | Wet magnetic particle examination method and device |
| US6246235B1 (en) * | 1998-04-22 | 2001-06-12 | Usx Corporation | Tubular products inspection |
| JP2001281227A (en) * | 2000-03-31 | 2001-10-10 | Kawasaki Steel Corp | Setting method for particle-size condition of magnetic particles used for wet fluorescent magnetic-particle flaw detection and fluorescent magnetic particles used for it |
| CN204925036U (en) * | 2015-06-15 | 2015-12-30 | 陈翠丽 | Compound magnetization unit of pipe end inside and outside wall non -contact |
| EP3329270B1 (en) * | 2015-07-28 | 2023-11-29 | Zetec, Inc. | Eddy current generation system |
| CN105929021A (en) * | 2016-06-21 | 2016-09-07 | 上海电气核电设备有限公司 | Small connecting pipe inner wall magnetic powder detecting device |
| CN109884175A (en) * | 2019-04-02 | 2019-06-14 | 中国计量大学 | A kind of metal pipeline flaw detection device of low frequency electromagnetic combination magnetic powder |
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