CN103105431B - Eddy current high/low-frequency compound detection equipment for seamless steel tubes - Google Patents
Eddy current high/low-frequency compound detection equipment for seamless steel tubes Download PDFInfo
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- CN103105431B CN103105431B CN201310025060.4A CN201310025060A CN103105431B CN 103105431 B CN103105431 B CN 103105431B CN 201310025060 A CN201310025060 A CN 201310025060A CN 103105431 B CN103105431 B CN 103105431B
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Abstract
The invention discloses eddy current high/low-frequency compound detection equipment for seamless steel tubes. The equipment comprises an electric control system, front and rear roller paths, a positioning pressure wheel device, a three-roller centering device, a lifting device, magnetizing devices, a flaw detection instrument, a demagnetizer, a stand and a blanking frame. The steel tubes to be detected stably enter into the pressure wheel device, the three-roller centering device and the two magnetizing devices through the transmission roller paths controlled by the electric control system for finishing full coverage detection of the steel tubes; the flaw detection instrument is used for displaying detection results; and the steel tubes enter into the demagnetizer and the stand for demagnetizing the steel tubes, finally enter into the blanking frame and are automatically separated and stored in qualified and unqualified product storage tanks. The equipment has the beneficial effects that each magnetizing device is equipped with a high-frequency probe and a low-frequency probe for on-line detection, so that the detection effect and the working efficiency are improved and the missing detection risk is lowered.
Description
Technical field
The present invention relates to a kind of defect-detecting equipment of weldless steel tube, particularly relate to a kind of defect-detecting equipment utilizing eddy-current technique.
Background technology
The main material producing bearing is weldless steel tube, the detection technique of weldless steel tube surface quality is existing is adopt through mode eddy current inspection equipment, principle is through the coil (probe) being connected with alternating current by steel pipe, eddy current magnetism will be produced in steel tube surface and nearly surface, when finding steel pipe defectiveness, eddy current magnetism changes, the impedance of magnetic test coil (probe) or induced voltage is caused to change, this change is through the process of instrument, send information, and then adopt equivalent relative method to judge, confirm the size having zero defect and defect, but when the defect direction on weldless steel tube is parallel to eddy current direction, detection sensitivity is just difficult to find defect, and the discontinuous defect of inner surface is also insensitive, particularly wall thickness is difficult to identify in the internal surface of steel pipe planar defect of more than 4.0mm more.
Summary of the invention
Object of the present invention is exactly to overcome above-mentioned weak point of the prior art, provides the eddy current of seamless steel tube low-and high-frequency compound detection equipment that a kind of Detection results is good and work efficiency is high.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of eddy current of seamless steel tube low-and high-frequency compound detection equipment, comprises electric-control system, front and back roller-way, location pressing wheel device, three-roller centring device, jacking gear, magnetizing assembly, detector device, demagnetizer and pallet, blanking rack.
Described electric-control system is arranged in independent regulator cubicle, for control defect-detecting equipment steel pipe transmission, realize steel pipe automatic loading/unloading, sorting, flaw indication report to the police, make equipment complete automatic flaw detection, and be provided with manual and automatically control, electric-control system major electrical equipment part has frequency converter and programmable controller, and adopts that bank of filters is incompatible carries out interference protection measure;
Being made up of multiple live-roller of described front and back roller-way, stud with polyurethane outside live-roller, protection steel tube surface is injury-free, and front and back roller-way length is respectively 9 meters, and running roller spacing is 0.8 meter, inspection speed 40-60 m/min, frequency control;
Described location pressing wheel device is made up of base platform, motor reducer, centering driven roller, spring compression mechanism, sensor, after steel pipe is transported into positioning drive unit, automatic driving steel pipe constant speed through magnetizing assembly and coil probe, and can be run in rotating;
Described three-roller centring device, be arranged on magnetizing assembly both sides, its effect is make steel pipe and magnetizing assembly concentric, and each pitch-row of described three-roller centring device is processed by numer centre, for ensureing the concentricity of equipment set, each parts machining precision will reach 7 grades;
Described jacking gear is made up of base, upper mounting plate, inside and outside sleeve, elevating mechanism etc., when being caused center High variation by the steel pipe caliber difference of detecting a flaw, regulated the lifting of magnetizing assembly by motor, reach preset diameters height, lifter adopts worm gear structure, can self-locking;
Described magnetizing assembly is primarily of formations such as probe, housings, it is characterized in that: described magnetizing assembly is equipped with high frequency probe and low-frequency probe, and carrying out line detection, described probe is a coil, during coil electricity, form eddy current magnetism, when steel pipe defectiveness, eddy current magnetism can change, and impedance or the induced voltage of magnetic test coil change, this change is shown by detector device, and display steel pipe has the size of zero defect and defect;
The important technological parameters of described detector device:
1, frequency is detected: 1kHz ~ 990kHz is adjustable, adjusts with 1kHz step-length;
2, gain: 0 ~ 69dB, adjusts with 1dB step-length;
3, phase place: 0 ~ 360 °, with 5 ° of step-length adjustment;
4, filtering: points 11 grades adjustable, is adapted to different inspection speeds;
5, display mode: the display of vector luminous point and linear time base display;
6, type of alarm: amplitude type of alarm and sector type of alarm;
7, alarm threshold: 0 ~ 100%, with 10% step-length adjustment;
8, sweep time: the sweep time of linear time base display divides 6 gears adjustable.
Described demagnetizer and pallet adopt AC and DC demagnetizer, be placed in positioning drive unit endpiece last group pinch roller outside, direct current demagnetization device is by the instrument regulable control that demagnetizes, steel pipe works before entering AC demagnetization device, pipe tail leaves rear stopping, prevent demagnetizer from generating heat, and join the magnetometer of a range 30Gs;
Described blanking rack length is 8 meters, wide is 2.2 meters, the square tube of whole employing 100*100*5mm makes, there is automatic sorting function, make production tube and waste product pipe separately, and use soft land, during steel pipe blanking, avoid steel pipe mutually to collide, cause damage and noise, table top lays nylon sheet and prevent steel pipe from scratching.
The technological process detected is: by the transmission roller channel of detected steel pipe via electric control system controls, enter pressing wheel device, three-roller centring device, steadily enter two magnetizing assemblys, complete and detect all standing of steel pipe, detector device display testing result, steel pipe enters demagnetizer again and pallet demagnetizes to steel pipe, finally enter blanking rack, depending on steel pipe have zero defect automatic sorting to just, waste product hopper.
The invention has the beneficial effects as follows: due to the skin effect of eddy current, frequency is higher, surface sensitivity is higher, so lower to the detection sensitivity of inwall and near surface flaw, present magnetizing assembly is equipped with high frequency probe and low-frequency probe, and carries out line detection, and an equipment completes all standing EDDY CURRENT to steel pipe surfaces externally and internally defect simultaneously, thus improve Detection results and work efficiency, reduce undetected risk.
Accompanying drawing explanation
Fig. 1 is conventional Chief equipment block scheme;
Fig. 2 is Chief equipment block scheme of the present invention.
Embodiment
Below in conjunction with a Fig. 2 and embodiment, the invention will be further described:
A kind of eddy current of seamless steel tube low-and high-frequency compound detection equipment, comprises electric-control system, front and back roller-way, location pressing wheel device, three-roller centring device, jacking gear, magnetizing assembly, detector device, demagnetizer and blanking rack.
Described electric-control system is arranged in independent regulator cubicle, controls the steel pipe transmission of defect-detecting equipment, realizes steel pipe automatic loading/unloading, sorting, flaw indication report to the police, make equipment complete automatic flaw detection, and is provided with and manually and automatically controls;
Described electric-control system major electrical equipment part has frequency converter and programmable controller, and adopts that bank of filters is incompatible carries out interference protection measure;
Being made up of multiple live-roller of described front and back roller-way, stud with polyurethane outside live-roller, protection steel tube surface is injury-free, and front and back roller-way length is respectively 9 meters, and running roller spacing is 0.8 meter, inspection speed 40-60 m/min, frequency control;
Described location pressing wheel device is made up of base platform, motor reducer, centering driven roller, spring compression mechanism, sensor, after steel pipe is transported into positioning drive unit, automatic driving steel pipe constant speed through magnetizing assembly and coil probe, and can be run in rotating;
Described three-roller centring device, be arranged on magnetizing assembly both sides, its effect is make steel pipe and magnetizing assembly concentric, and each pitch-row of described three-roller centring device is processed by numer centre, for ensureing the concentricity of equipment set, each parts machining precision will reach 7 grades;
Described jacking gear is made up of base, upper mounting plate, inside and outside sleeve, elevating mechanism etc., when being caused center High variation by the steel pipe caliber difference of detecting a flaw, regulated the lifting of magnetizing assembly by motor, reach preset diameters height, lifter adopts worm gear structure, can self-locking;
Described magnetizing assembly is primarily of formations such as probe, housings, it is characterized in that: described magnetizing assembly is equipped with high frequency probe and low-frequency probe, and carrying out line detection, described probe is a coil, during coil electricity, form eddy current magnetism, when steel pipe defectiveness, eddy current magnetism can change, and impedance or the induced voltage of magnetic test coil change, this change is shown by detector device, and display steel pipe has the size of zero defect and defect;
The important technological parameters of described detector device:
1, frequency is detected: 1kHz ~ 990kHz is adjustable, adjusts with 1kHz step-length;
2, gain: 0 ~ 69dB, adjusts with 1dB step-length;
3, phase place: 0 ~ 360 °, with 5 ° of step-length adjustment;
4, filtering: points 11 grades adjustable, is adapted to different inspection speeds;
5, display mode: the display of vector luminous point and linear time base display;
6, type of alarm: amplitude type of alarm and sector type of alarm;
7, alarm threshold: 0 ~ 100%, with 10% step-length adjustment;
8, sweep time: the sweep time of linear time base display divides 6 gears adjustable.
Described demagnetizer and pallet adopt AC and DC demagnetizer, be placed in positioning drive unit endpiece last group pinch roller outside, direct current demagnetization device is by the instrument regulable control that demagnetizes, steel pipe works before entering AC demagnetization device, pipe tail leaves rear stopping, prevent demagnetizer from generating heat, and join the magnetometer of a range 30Gs;
Described blanking rack length is 8 meters, wide is 2.2 meters, the square tube of whole employing 100*100*5mm makes, there is automatic sorting function, make production tube and waste product pipe separately, and use soft land, during steel pipe blanking, avoid steel pipe mutually to collide, cause damage and noise, table top lays nylon sheet and prevent steel pipe from scratching.
The technological process detected is: the technological process of detection is: by the transmission roller channel of detected steel pipe via electric control system controls, enter pressing wheel device, three-roller centring device, steadily enter two magnetizing assemblys, complete and detect all standing of steel pipe, detector device display testing result, steel pipe enters demagnetizer again and pallet demagnetizes to steel pipe, finally enter blanking rack, depending on steel pipe have zero defect automatic sorting to just, waste product hopper.
Claims (2)
1. an eddy current of seamless steel tube low-and high-frequency compound detection equipment, comprise electric-control system, front and back roller-way, location pressing wheel device, three-roller centring device, jacking gear, magnetizing assembly, detector device, demagnetizer and pallet, blanking rack, described electric-control system is arranged in independent regulator cubicle, for controlling the steel pipe transmission of defect-detecting equipment, realize steel pipe automatic loading/unloading, sorting, flaw indication is reported to the police, equipment is made to complete automatic flaw detection, and be provided with manual and automatically control, electric-control system major electrical equipment part has frequency converter and programmable controller, and adopt that bank of filters is incompatible carries out interference protection measure, described front and back roller-way is made up of multiple live-roller, studs with polyurethane outside live-roller, and protection steel tube surface is injury-free, and front and back roller-way length is respectively 9 meters, and running roller spacing is 0.8 meter, inspection speed 40-60 m/min, frequency control, described location pressing wheel device is made up of base platform, motor reducer, centering driven roller, spring compression mechanism, sensor, after steel pipe is transported into positioning drive unit, automatic driving steel pipe constant speed through magnetizing assembly and coil probe, and can be run in rotating, described three-roller centring device, is arranged on magnetizing assembly both sides, and its effect makes steel pipe concentric with magnetizing assembly, and each pitch-row of described three-roller centring device is processed by numer centre, and for ensureing the concentricity of equipment set, each parts machining precision will reach 7 grades, described jacking gear is made up of base, upper mounting plate, inside and outside sleeve, elevating mechanism, when being caused center High variation by the steel pipe caliber difference of detecting a flaw, regulated the lifting of magnetizing assembly by motor, reach preset diameters height, lifter adopts worm gear structure, can self-locking, described magnetizing assembly is formed primarily of probe, housing, it is characterized in that: described magnetizing assembly is equipped with high frequency probe and low-frequency probe, and carrying out line detection, described probe is a coil, during coil electricity, form eddy current magnetism, when steel pipe defectiveness, eddy current magnetism can change, and impedance or the induced voltage of magnetic test coil change, this change is shown by detector device, and display steel pipe has the size of zero defect and defect, the important technological parameters of described detector device: 1, detect frequency: 1kHz ~ 990kHz is adjustable, adjusts with 1kHz step-length, 2, gain: 0 ~ 69dB, adjusts with 1dB step-length, 3, phase place: 0 ~ 360 °, with 5 ° of step-length adjustment, 4, filtering: points 11 grades adjustable, is adapted to different inspection speeds, 5, display mode: the display of vector luminous point and linear time base display, 6, type of alarm: amplitude type of alarm and sector type of alarm, 7, alarm threshold: 0 ~ 100%, with 10% step-length adjustment, 8, sweep time: the sweep time of linear time base display divides 6 gears adjustable, described demagnetizer and pallet adopt AC and DC demagnetizer, be placed in positioning drive unit endpiece last group pinch roller outside, direct current demagnetization device is by the instrument regulable control that demagnetizes, steel pipe works before entering AC demagnetization device, pipe tail leaves rear stopping, prevent demagnetizer from generating heat, and join the magnetometer of a range 30Gs, described blanking rack length is 8 meters, wide is 2.2 meters, the square tube of whole employing 100*100*5mm makes, there is automatic sorting function, make production tube and waste product pipe separately, and use soft land, during steel pipe blanking, avoid steel pipe mutually to collide, cause damage and noise, table top lays nylon sheet and prevent steel pipe from scratching.
2. a kind of eddy current of seamless steel tube low-and high-frequency compound detection equipment according to claim 1, it is characterized in that: the technological process of detection is: by the transmission roller channel of detected steel pipe via electric control system controls, enter pressing wheel device, three-roller centring device, steadily enter two magnetizing assemblys, complete and all standing of steel pipe is detected, detector device display testing result, steel pipe enters demagnetizer again and pallet demagnetizes to steel pipe, finally enter blanking rack, depending on steel pipe have zero defect automatic sorting to just, waste product hopper.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310025060.4A CN103105431B (en) | 2013-01-15 | 2013-01-15 | Eddy current high/low-frequency compound detection equipment for seamless steel tubes |
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| CN201310025060.4A CN103105431B (en) | 2013-01-15 | 2013-01-15 | Eddy current high/low-frequency compound detection equipment for seamless steel tubes |
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| CN103105431A CN103105431A (en) | 2013-05-15 |
| CN103105431B true CN103105431B (en) | 2015-06-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278559B (en) * | 2013-04-25 | 2016-12-28 | 宁波金特信钢铁科技有限公司 | A kind of eddy current of seamless steel tube detection device |
| CN103487503B (en) * | 2013-09-26 | 2016-01-13 | 上海海事大学 | A kind of rotating magnetic field eddy current probe |
| CN104330467B (en) * | 2014-11-11 | 2017-03-29 | 浙江五洲新春集团股份有限公司 | Steel Pipe For Bearing flaw detection production line |
| CN109975397B (en) * | 2017-12-27 | 2022-06-28 | 核动力运行研究所 | Multi-frequency eddy current complex signal-based high-fidelity extraction method for damage information of heat transfer pipe |
| CN108845025B (en) * | 2018-05-30 | 2022-09-13 | 中国航发动力股份有限公司 | Eddy current detection system and method for pin hole with copper bush |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2205557Y (en) * | 1994-07-07 | 1995-08-16 | 张永和 | Automatic vertex crack detector for steel pipe |
| CN2494986Y (en) * | 2001-09-29 | 2002-06-12 | 中国科学院金属研究所 | Ultrasound and eddy current compound automatic detecting apparatus for tubing |
| CN101241108A (en) * | 2008-03-03 | 2008-08-13 | 山东济宁模具厂 | Eddy current inspection equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780554A (en) * | 1980-11-07 | 1982-05-20 | Sumitomo Metal Ind Ltd | Eddy-current crack detection testing device |
| JPH01301161A (en) * | 1988-05-30 | 1989-12-05 | Mitsubishi Metal Corp | Eddy current induction type defect detecting device |
| JP2905157B2 (en) * | 1996-11-22 | 1999-06-14 | 日本金属工業株式会社 | Inspection method of high frequency welded steel pipe and its manufacturing apparatus |
-
2013
- 2013-01-15 CN CN201310025060.4A patent/CN103105431B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2205557Y (en) * | 1994-07-07 | 1995-08-16 | 张永和 | Automatic vertex crack detector for steel pipe |
| CN2494986Y (en) * | 2001-09-29 | 2002-06-12 | 中国科学院金属研究所 | Ultrasound and eddy current compound automatic detecting apparatus for tubing |
| CN101241108A (en) * | 2008-03-03 | 2008-08-13 | 山东济宁模具厂 | Eddy current inspection equipment |
Non-Patent Citations (2)
| Title |
|---|
| 钢管自动涡流探伤***;左建国 等;《钢管》;19921231(第6期);第52-54页 * |
| 钢管自动涡流探伤***设计;蔡杰 等;《大连轻工业学院学报》;20051231;第24卷(第4期);第309-312页 * |
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