CN107796867A - Steel pipe magnetic leakage crack detection method - Google Patents
Steel pipe magnetic leakage crack detection method Download PDFInfo
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- CN107796867A CN107796867A CN201711036309.6A CN201711036309A CN107796867A CN 107796867 A CN107796867 A CN 107796867A CN 201711036309 A CN201711036309 A CN 201711036309A CN 107796867 A CN107796867 A CN 107796867A
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- optoelectronic switch
- steel pipe
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- flaw
- probe
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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
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
A kind of steel pipe magnetic leakage crack detection method, its detecting devices is magnetic flux leakage testing device, and when it is detected a flaw, steel pipe enters from area in preparation, optoelectronic switch 11 detects steel pipe successively before the last # of 1#, 2# ..., after optoelectronic switch detects workpiece head before last #, it is delayed the T seconds, flaw detection probe is closed, the head of workpiece will just be clamped, detected, when as 1#, 2# ..., optoelectronic switch detects respective target successively after optoelectronic switch, probe optoelectronic switch, the last # of 1#, 2# ... before last #, main frame is normally detected a flaw；When this sequentially causes confusion, main shut-down system.Relative to prior art, technique effect of the invention is that the present invention is designed as order and protected; if optoelectronic switch transmits signal not in accordance with sequence of positions, PLC is overhauled by main shut-down system; after fixing a breakdown, then it is operated, reduces the risk that flaw detection probe is damaged.
Description
Technical field
The present invention relates to a kind of method of detection of outer surface of steel tube.
Background technology
Steel pipe in production, will detect a flaw to outer surface.My company uses magnetic flux leakage testing device now, and it includes steel
Pipe transfer passage, fixed flaw detection probe on the passage, after steel pipe head enters probe area, flaw detection probe closing（By steel pipe
Clamp）, detected a flaw, after steel pipe afterbody leaves probe, flaw detection probe is opened, and prepares to detect next Zhi Gangguan.
The content of the invention
The present invention technical problems to be solved be：Flaw detection probe beats the out of turn of opening/closing, causes steel pipe to visit
Hinder probe to break, and the probe is critical component, once damage, it is necessary to repaired or changed, during this, can not be worked,
The steel pipe's production of influence company.According to statistics, the average flaw detection every month probe of each magnetic flux leakage testing device is damaged 2.8 times.
Technical scheme is specially：
A kind of steel pipe magnetic leakage crack detection method, its detecting devices are magnetic flux leakage testing device, including steel pipe market passage, steel pipe market passage
It is divided into area in preparation, flaw detection area, leaves area, flaw detection probe, the steel pipe market passage of the upstream for probe of detecting a flaw is fixed by flaw detection area
Preceding optoelectronic switch is provided with, steel pipe market passage downstream is provided with rear optoelectronic switch, and flaw detection probe is provided with probe photoelectricity and opened
Close, preceding optoelectronic switch, the position sensing equipment that rear optoelectronic switch is steel pipe, preceding optoelectronic switch are compiled successively according to steel pipe direction of advance
Number it is the last # of 1#, 2# ..., rear optoelectronic switch is the last # of 1#, 2# ... according to steel pipe direction of advance number consecutively；
When it is detected a flaw, steel pipe enters from area in preparation, and optoelectronic switch 11 detects steel pipe successively before the last # of 1#, 2# ..., before last #
After optoelectronic switch detects workpiece head, it is delayed the T seconds, flaw detection probe is closed, and will just be clamped the head of workpiece, is visited
Survey, with the progress of detection, workpiece is integrally moved rearwards, and optoelectronic switch detects after its head is gradually by 1#, 2# ... last #,
Optoelectronic switch is detected after workpiece afterbody leaves after 1#, and flaw detection probe is opened, and prepares next circulation；The T seconds are equal to light before last #
Ratio of the electric switch to the distance and steel pipe pace of flaw detection probe；Optoelectronic switch before last #, probe photoelectricity as 1#, 2# ...
When optoelectronic switch detects respective target successively after switch, the last # of 1#, 2# ..., main frame is normally detected a flaw；When the order occurs
When chaotic, main shut-down system.
Ash disposal operation periodically is carried out to optoelectronic switch.
Magnetic flux leakage testing device includes PLC and audible-visual annunciator, PLC connections audible-visual annunciator, main frame and each optoelectronic switch,
When main shut-down system, audible-visual annunciator alarm.
Relative to prior art, technique effect of the invention is that the present invention is designed as order and protected, if optoelectronic switch is not
It is to transmit signal according to sequence of positions, PLC is overhauled by main shut-down system, after fixing a breakdown, then is operated, reduced
The risk that flaw detection probe is damaged.
Brief description of the drawings
Fig. 1 is the schematic diagram of detection workpieces.
Embodiment
Such as Fig. 1, a kind of steel pipe magnetic leakage crack detection method, its detecting devices is magnetic flux leakage testing device, including steel pipe market passage 10,
Steel pipe market passage 10 is divided into area in preparation, flaw detection area, leaves area, and flaw detection probe 20 is fixed in flaw detection area, flaw detection probe 20
The steel pipe market passage 10 of upstream is provided with preceding optoelectronic switch 11, and steel pipe market passage 10 downstream is provided with rear optoelectronic switch
12, flaw detection probe 20 is provided with probe optoelectronic switch 21, and preceding optoelectronic switch 11, rear optoelectronic switch 12 set for the position sensing of steel pipe
Standby, probe optoelectronic switch 21 is the detecting devices of flaw detection probe 20, and preceding optoelectronic switch 11 is according to steel pipe direction of advance number consecutively
For the last # of 1#, 2# ..., rear optoelectronic switch 12 is the last # of 1#, 2# ... according to steel pipe direction of advance number consecutively.
When it is detected a flaw, steel pipe 30 enters from area in preparation, and optoelectronic switch 11 detects steel pipe 30 successively before the last # of 1#, 2# ...,
Optoelectronic switch 11 detects workpiece head before last #（Steel pipe 30）Afterwards, it is delayed the T seconds, flaw detection probe 20 is closed, just will be by workpiece
Head clamp, detected, with the progress of detection, workpiece is integrally moved rearwards, its head is gradually by 1#, 2# ... last #
Optoelectronic switch 12 detects afterwards, and optoelectronic switch 12 detects workpiece afterbody after 1#（Steel pipe 30）After leaving, flaw detection probe 20 dozens
Open, prepare next circulation.Ratio of the T seconds equal to optoelectronic switch before last # to the distance and steel pipe pace of flaw detection probe.
As 1#, 2# ... after optoelectronic switch 11 before last #, probe optoelectronic switch 21,1#, 2# ... last # optoelectronic switch 12 according to
Secondary when detecting respective target, main frame is normally detected a flaw；When this sequentially causes confusion, main shut-down system.
Entered analysis, the steel pipe probe that will detect a flaw breaks the two groups of situations that are divided into, first, probe close in advance, cause to be hit；The
2nd, the steel pipe that detection finishes is by the way that flaw detection probe 20 is opened not to be opened in time, causes next Zhi Gangguan to be broken.
In fact, caused by both reasons are all the signal inaccuracy of optoelectronic switch output, this closing method（Said sequence causes confusion
When）, it can determine that whether the information of its transmission is correct, such as, optoelectronic switch 11 detects workpiece head very signal before 1#, 2#
Afterwards, optoelectronic switch 11 before next timing 3#, if other optoelectronic switches send signal, a timing has optoelectronic switch production
The signal gone out is inaccurate, can thus make preparation and judge, avoids it inaccurate.
Through analysis, workpiece is rotary transport, and its surface scale, dust kick up that travel fatigue is larger, and optoelectronic switch is easily because of ash
Dirt（It is exactly that dust is subjected to signal transmission as workpiece）, in no steel pipe, malfunction, which is closed, pops one's head in, and is damaged.It is so fixed
Phase carries out ash disposal operation to optoelectronic switch, can also reduce and be hit.
Magnetic flux leakage testing device includes PLC and audible-visual annunciator, PLC connections audible-visual annunciator, main frame and each optoelectronic switch,
When main shut-down system, audible-visual annunciator alarm.
Other guide participates in prior art.
Above-described is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise of general idea of the present invention is not departed from, some changes and improvements can also be made, these should also be considered as the present invention's
Protection domain.
Claims (3)
1. a kind of steel pipe magnetic leakage crack detection method, its detecting devices is magnetic flux leakage testing device, including steel pipe market passage, steel pipe market lead to
Road is divided into area in preparation, flaw detection area, leaves area, and flaw detection probe is fixed in flaw detection area, and the steel pipe market of the upstream for probe of detecting a flaw leads to
Road is provided with preceding optoelectronic switch, and steel pipe market passage downstream is provided with rear optoelectronic switch, and flaw detection probe is provided with probe photoelectricity
Switch, preceding optoelectronic switch, rear optoelectronic switch be steel pipe position sensing equipment, preceding optoelectronic switch according to steel pipe direction of advance successively
Numbering is the last # of 1#, 2# ..., and rear optoelectronic switch is the last # of 1#, 2# ... according to steel pipe direction of advance number consecutively；
When it is detected a flaw, steel pipe enters from area in preparation, and optoelectronic switch 11 detects steel pipe successively before the last # of 1#, 2# ..., before last #
After optoelectronic switch detects workpiece head, it is delayed the T seconds, flaw detection probe is closed, and will just be clamped the head of workpiece, is visited
Survey, with the progress of detection, workpiece is integrally moved rearwards, and optoelectronic switch detects after its head is gradually by 1#, 2# ... last #,
Optoelectronic switch is detected after workpiece afterbody leaves after 1#, and flaw detection probe is opened, and prepares next circulation；
Ratio of the T seconds equal to optoelectronic switch before last # to the distance and steel pipe pace of flaw detection probe；
It is characterized in that：
As 1#, 2# ..., optoelectronic switch detects respectively successively after optoelectronic switch before last #, probe optoelectronic switch, 1#, 2# ... last #
From target when, main frame is normally detected a flaw；When this sequentially causes confusion, main shut-down system.
2. steel pipe magnetic leakage crack detection method as claimed in claim 1, it is characterised in that：Ash disposal work periodically is carried out to optoelectronic switch
Industry.
3. steel pipe magnetic leakage crack detection method as claimed in claim 1, it is characterised in that：Magnetic flux leakage testing device includes PLC and acousto-optic report
Alert device, PLC connections audible-visual annunciator, main frame and each optoelectronic switch, when main shut-down system, audible-visual annunciator alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711036309.6A CN107796867A (en) | 2017-10-30 | 2017-10-30 | Steel pipe magnetic leakage crack detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711036309.6A CN107796867A (en) | 2017-10-30 | 2017-10-30 | Steel pipe magnetic leakage crack detection method |
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| Publication Number | Publication Date |
|---|---|
| CN107796867A true CN107796867A (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711036309.6A Pending CN107796867A (en) | 2017-10-30 | 2017-10-30 | Steel pipe magnetic leakage crack detection method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3757974A (en) * | 1972-05-25 | 1973-09-11 | Foerster Inst Dr Friedrich | Pipe conveyor apparatus |
| CN2446518Y (en) * | 2000-09-21 | 2001-09-05 | 钢铁研究总院 | Steel pipe magnetic leakage crack detection device |
| CN201882598U (en) * | 2010-11-15 | 2011-06-29 | 浙江龙驰防腐技术有限公司 | Control device for automatic start and stop of riding wheels |
| CN202421785U (en) * | 2011-12-20 | 2012-09-05 | 鞍钢股份有限公司 | Longitudinal probe and action mechanism protection system for magnetic flux leakage flaw detector |
| CN105834248A (en) * | 2016-04-06 | 2016-08-10 | 内蒙古包钢钢联股份有限公司 | Flaw detection system device for steel pipe finishing line and flaw detection method |
-
2017
- 2017-10-30 CN CN201711036309.6A patent/CN107796867A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3757974A (en) * | 1972-05-25 | 1973-09-11 | Foerster Inst Dr Friedrich | Pipe conveyor apparatus |
| CN2446518Y (en) * | 2000-09-21 | 2001-09-05 | 钢铁研究总院 | Steel pipe magnetic leakage crack detection device |
| CN201882598U (en) * | 2010-11-15 | 2011-06-29 | 浙江龙驰防腐技术有限公司 | Control device for automatic start and stop of riding wheels |
| CN202421785U (en) * | 2011-12-20 | 2012-09-05 | 鞍钢股份有限公司 | Longitudinal probe and action mechanism protection system for magnetic flux leakage flaw detector |
| CN105834248A (en) * | 2016-04-06 | 2016-08-10 | 内蒙古包钢钢联股份有限公司 | Flaw detection system device for steel pipe finishing line and flaw detection method |
Non-Patent Citations (2)
| Title |
|---|
| 杜建生 等: "基于PLC的钢管自动探伤系统设计", 《冶金分析》 * |
| 童孝木 等: "EMT-D系统检测钻杆盲区的控制及应用", 《江汉石油职工大学学报》 * |
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Application publication date: 20180313 |