JPH01134253U - - Google Patents
Info
- Publication number
- JPH01134253U JPH01134253U JP3136788U JP3136788U JPH01134253U JP H01134253 U JPH01134253 U JP H01134253U JP 3136788 U JP3136788 U JP 3136788U JP 3136788 U JP3136788 U JP 3136788U JP H01134253 U JPH01134253 U JP H01134253U
- Authority
- JP
- Japan
- Prior art keywords
- flaw detection
- ferromagnetic tube
- detection device
- magnetization
- electromagnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 18
- 230000005291 magnetic effect Effects 0.000 claims description 6
- 230000005294 ferromagnetic effect Effects 0.000 claims 7
- 230000005415 magnetization Effects 0.000 claims 3
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000005284 excitation Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 1
Description
第１図は、本考案の原理を説明するための電磁
探傷装置の構成を概略的に示す正面図、第２図は
、第１図の電磁探傷装置の部分概略平面図、第３
図は、本考案のより具体的な実施例である電磁探
傷装置の概略正面図、第４図は、第３図のＡ―Ａ
線断面図、第５図から第８図は、第３図および第
４図の電磁探傷装置における被検査材対象鋼管に
対する固定プローブ組立体の走査軌跡を示す概略
図、第９図は、直流漏洩磁束探傷法による直流励
磁電流ときず信号出力との関係を示す図、第１０
図は、直流漏洩磁束探傷法による鋼管の回転数（
相対速度）ときず信号出力との関係を示す図、第
１１図は、直流漏洩磁束探傷に於ける直流励磁電
流ときず信号鮮明度を表わすＳ／Ｎとの関係を示
す図、第１２図および第１３図は、本考案の原理
による電磁探傷装置にて探傷した実際の傷記録波
形の一例を示す図、第１４図は、本考案の原理に
よる探傷における探傷試験周波数と信号対雑音比
との関係を示す図、第１５図は、本考案の原理に
よる探傷における鋼管の回転数と信号出力との関
係を示す図、第１６図は、本考案の別の実施例と
しての短尺鋼管自動探傷装置の平面図、第１７図
は、第１６図の短尺鋼管自動探傷装置の側面図、
第１８図は、第１６図の短尺鋼管自動探傷装置の
正面図、第１９図および第２０図は、第１６図の
短尺鋼管自動探傷装置における探傷走査軌跡を示
す図、第２１図は、第１６図の短尺鋼管自動探傷
装置にて探傷を行つた記録結果例を示す図である
。
１Ａ……鋼管、１１，１２……渦流探傷用セン
サ、２１，２２……局部磁化力用磁極、３０……
磁極母体、４０……励磁コイル、５０……直流電
源。
1 is a front view schematically showing the configuration of an electromagnetic flaw detection device for explaining the principle of the present invention, FIG. 2 is a partial schematic plan view of the electromagnetic flaw detection device of FIG. 1, and FIG.
The figure is a schematic front view of an electromagnetic flaw detection device that is a more specific embodiment of the present invention, and Figure 4 is A-A in Figure 3.
5 to 8 are schematic diagrams showing the scanning locus of the fixed probe assembly on the steel pipe to be inspected in the electromagnetic flaw detection equipment of FIGS. 3 and 4, and FIG. Diagram showing the relationship between DC excitation current and flaw signal output by magnetic flux flaw detection method, No. 10
The figure shows the rotational speed (
Figure 11 is a diagram showing the relationship between relative velocity) and flaw signal output, and Figure 12 is a diagram showing the relationship between DC excitation current and S/N representing flaw signal clarity in DC leakage magnetic flux testing. Fig. 13 shows an example of an actual flaw recording waveform detected by an electromagnetic flaw detection device based on the principle of the present invention, and Fig. 14 shows the relationship between the test frequency and signal-to-noise ratio in flaw detection based on the principle of the present invention. FIG. 15 is a diagram showing the relationship between the rotation speed of the steel pipe and the signal output in flaw detection according to the principle of the present invention, and FIG. 16 is an automatic short steel pipe flaw detection device as another embodiment of the present invention. 17 is a side view of the automatic flaw detection device for short steel pipes shown in FIG. 16,
FIG. 18 is a front view of the automatic flaw detection device for short steel pipes shown in FIG. FIG. 17 is a diagram showing an example of recorded results obtained by flaw detection performed using the short steel pipe automatic flaw detection device shown in FIG. 16; 1A... Steel pipe, 11, 12... Sensor for eddy current flaw detection, 21, 22... Magnetic pole for local magnetizing force, 30...
Magnetic pole base, 40...exciting coil, 50...DC power supply.
Claims (1)
手段と、前記強磁性管を挟んで相対向する磁極を
有しその強磁性管の軸方向と交差する方向におい
てその強磁性管の円周方向に沿つて直流磁化を行
うための直流磁化手段と、前記相対向する磁極の
間において前記強磁性管の円周面に対向させて配
設された渦流探傷用センサとを備えたことを特徴
とする電磁探傷装置。 (2) 前記保持手段は、保持した前記強磁性管を
一定方向に回転せしめるための回転駆動手段を含
んでおり、前記直流磁化手段と前記渦流探傷用セ
ンサとは、筺体に取り付けられており、前記筺体
は、前記強磁性管の軸方向において往復動可能と
されている請求項(1)記載の電磁探傷装置。[Claims for Utility Model Registration] (1) A holding means for holding a ferromagnetic tube to be inspected, and having magnetic poles facing each other across the ferromagnetic tube and intersecting the axial direction of the ferromagnetic tube. DC magnetization means for performing DC magnetization along the circumferential direction of the ferromagnetic tube in the direction, and eddy current flaw detection arranged to face the circumferential surface of the ferromagnetic tube between the opposing magnetic poles. An electromagnetic flaw detection device characterized by being equipped with a sensor for (2) The holding means includes a rotational drive means for rotating the held ferromagnetic tube in a fixed direction, and the DC magnetization means and the eddy current flaw detection sensor are attached to a housing, 2. The electromagnetic flaw detection apparatus according to claim 1, wherein the casing is capable of reciprocating in the axial direction of the ferromagnetic tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3136788U JPH01134253U (en) | 1988-03-09 | 1988-03-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3136788U JPH01134253U (en) | 1988-03-09 | 1988-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01134253U true JPH01134253U (en) | 1989-09-13 |
Family
ID=31257180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3136788U Pending JPH01134253U (en) | 1988-03-09 | 1988-03-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01134253U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5870157A (en) * | 1981-07-21 | 1983-04-26 | ヌ−ケン・ゲ−エムベ−ハ− | Nondestructive testing method for ferromagnetic substance material and its device |
-
1988
- 1988-03-09 JP JP3136788U patent/JPH01134253U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5870157A (en) * | 1981-07-21 | 1983-04-26 | ヌ−ケン・ゲ−エムベ−ハ− | Nondestructive testing method for ferromagnetic substance material and its device |
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