CN2446518Y - Steel pipe magnetic leakage crack detection device - Google Patents
Steel pipe magnetic leakage crack detection device Download PDFInfo
- Publication number
- CN2446518Y CN2446518Y CN 00254294 CN00254294U CN2446518Y CN 2446518 Y CN2446518 Y CN 2446518Y CN 00254294 CN00254294 CN 00254294 CN 00254294 U CN00254294 U CN 00254294U CN 2446518 Y CN2446518 Y CN 2446518Y
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- steel pipe
- magnetic leakage
- probe
- detection device
- magnetizing
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Abstract
The utility model belongs to the field of nondestructive inspection, which is suitable for an on-line steel pipe magnetic leakage inspection device. The device is formed by the method that a magnetic leakage inspection device is fixedly installed on a conveying line; a magnetic leakage probe is installed on an outer shell at the lower end of a detected steel pipe. The device has the advantages of simple structure, reasonable design, and convenient and safe installation and manufacture.
Description
The utility model device belongs to the nondestructive examination field, is specially adapted to the magnetic leakage detection device of steel pipe.
The magnetic leakage detection of steel pipe is a kind of new Dynamic Non-Destruction Measurement that recent two decades rises in the world.It is when detecting ferromagnetic steel pipe, owing in working method, performance index with detect remedied the automatic lossless detection method of the existing routine some shortcomings of---mainly being ultrasonic testing and eddy current testing method---such as the aspect of hindering type, and demonstrate very strong vitality.Because magnetic leakage detection equipment structure is huge, system complex, process for machining and manufacturing require very high, so the product of steel pipe magnetic leakage detection equipment just concentrates on well-known large-scale non-destructive detecting device manufacturing company of several in the world families at present.
In the prior art, the domestic import steel shaft that can see all is the working methods that adopt " probe rotation/steel pipe straight ahead " to hindering the leakage field detecting devices.The formation and the working method of this equipment are: a huge rotary body is done high-speed rotation around steel pipe, be hung with leakage field probe and magnetizing assembly on the rotary body, when steel pipe was done rectilinear motion and passed rotary body, probe and magnetizing assembly were finished flaw detection or the scanning to whole outer surface of steel tube.Because the weight of magnetizing assembly is bigger, is in the rotary balance state in order to make rotary body in rotation, must hang a pair of probe and magnetizing assembly symmetrically on the rotary body." probe rotation " though magnetic leakage detection method detection speed very fast, detection sensitivity is higher, exists a series of problems for the processing and the manufacturing of equipment.At first, because heavy magnetizing assembly is done high speed rotating with probe, very high requirement has been proposed for the design and the manufacturing of whole rotatory mechanical system (being rotary body).In addition, magnetization current is input to goes in the magnetizing assembly on the rotary body and transfer out from rotary body by the detection signal that probe obtains, all need to adopt coupling technique just can finish the transmission of electric current and signal, and use the interference that very easily causes of coupling process itself, and then bring burden and pressure for the work of electronic device.
The purpose of this utility model is that proposition is a kind of reasonable in design simple in structure, and easily manufactured and safe, economic steel pipe magnetic leakage detection device is installed.
The utility model device is the mode that changes in the prior art by rotation leakage field probe flaw detection steel pipe, and leakage field probe and magnetizing assembly are fixed on the feed track of conveying steel pipe, finishes scanning to whole outer surface of steel tube by the steel pipe forward travel of spinning.Below with reference to the accompanying drawings, the utility model device is described in detail, and in following accompanying drawing, accompanying drawing 1 is the utility model steel pipe magnetic leakage detection device synoptic diagram that works online, accompanying drawing 2 is the work synoptic diagram of steel pipe and failure detector, and accompanying drawing 3 is the cross sectional representation of steel pipe and magnetic leakage detection device.In the accompanying drawings, 1 is the steel pipe feed track, and 2 is monitor station, and 3 is magnetizing assembly, and 4 is steel pipe, and 5 are the leakage field probe, and 6 is yoke, and 7 is magnetizing coil, and 8 is iron core, and 9 is shell.The composition that can find out the utility model steel pipe magnetic leakage detection device with reference to the accompanying drawings is in steel pipe feed track (1) section monitor station (2) to be housed fixedly, it is characterized in that magnetizing assembly (3) is to be fixedly mounted on the monitor station (2), on iron core (8), be set with magnetizing coil (7), iron core (8) and magnetizing coil (7) are installed in the shell (9), and yoke (6) and leakage field probe (5) also is housed in the upper end of shell (9).It is shell (9) upper surface below the steel pipe (3) between two yokes (6) that the further feature of the utility model magnetic leakage detection device also has the installation of leakage field probe (5).The on line of magnetizing coil in this device (7) and the power supply of switch board join, and the detection signal line of leakage field probe (5) is connected with Computer Processing input port in the switch board.Can clearly note the size and the position of defective in the detected steel pipe (4) like this.
Adopt the utility model steel pipe magnetic leakage detection device.Compare with the magnetic leakage detection mode of " probe rotation/steel pipe straight ahead ", this device has following several characteristics:
1. in the flaw detection mode of probe rotation, be in the rotary balance state, must hang a pair of magnetizing assembly symmetrically on the rotary body in order to make huge whirligig.And adopt the fixing working method of this device probe, not only saved huge rotating mechanism, and the quantity of magnetizing assembly also is reduced to one from two.
7. in the flaw detection mode of probe rotation, in order to reduce the moment of inertia of rotary magnetization device, will compress the number of turn of magnetizing coil, its cost is to have to present with big magnetization current (5～10A) as far as possible.And adopt the fixing working method of this device probe because magnetizing assembly itself do not rotate, do not have balance proportioning problem and to the restriction of volume and weight, thus magnetizing coil can suitably increase, reduce magnetization current (2～3A), avoided coil heating.
3. in the flaw detection mode of probe rotation, powerful magnetization current will be sent in the magnetizing assembly of rotation and go, and the fine leak magnetic signal that rotating detector picks up will transmit out.The coupled transfer of this strong weak electric signal is a difficult point during entire equipment is made, and also is the principal element that signal to noise ratio (S/N ratio) and reliability are surveyed in influence.And adopt the fixing working method of this device probe, saved the coupled transfer link, and easily shielding, anti-interference, reduced burden for the signal Processing of instrument.
4. in the flaw detection mode of probe rotation, steel pipe, probe and magnetizing assembly all are kept in motion, to guarantee this moment to pop one's head in and steel pipe between the constant gap of lifting from, the design of probe tracking mechanism and manufacture difficulty are very big.And adopting the fixing working method of this device probe, probe and magnetizing assembly are motionless, as long as utilize the running roller on the transmission raceway spacing to popping one's head in, just can guarantee the constant gap of lifting from, and be not only easy but also reliable.
Description of drawings
1, the steel pipe magnetic leakage detection device synoptic diagram that works online.
2, steel pipe and failure detector work synoptic diagram.
3, the cross sectional representation of steel pipe and magnetic leakage detection device.
Sequence number is represented among the figure: 1. transmission roller channel; 2. monitor station; 3. magnetizing assembly; 4. steel pipe; 5. leakage field is popped one's head in; 6. yoke; 7. magnetizing coil; 8. iron core; 9. shell.
Claims (2)
1, a kind of steel pipe magnetic leakage detection device, the composition of this device is at steel pipe feed track (1) section internal fixation monitor station (2) to be housed, it is characterized in that magnetizing assembly (3) is to be fixedly mounted on the monitor station (2), on iron core (8), be set with magnetizing coil (7), iron core (8) and magnetizing coil (7) are installed in the shell (9), and yoke (6) and leakage field probe (5) also is housed in the upper end of shell (9).
2,, it is characterized in that the installation site of leakage field probe (5) is shell (9) upper surface below the steel pipe (3) between two yokes (6) according to the described device of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00254294 CN2446518Y (en) | 2000-09-21 | 2000-09-21 | Steel pipe magnetic leakage crack detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00254294 CN2446518Y (en) | 2000-09-21 | 2000-09-21 | Steel pipe magnetic leakage crack detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2446518Y true CN2446518Y (en) | 2001-09-05 |
Family
ID=33611581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00254294 Expired - Fee Related CN2446518Y (en) | 2000-09-21 | 2000-09-21 | Steel pipe magnetic leakage crack detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2446518Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796867A (en) * | 2017-10-30 | 2018-03-13 | 林州凤宝管业有限公司 | Steel pipe magnetic leakage crack detection method |
| CN108941357A (en) * | 2018-06-12 | 2018-12-07 | 四川大学 | A kind of steel pipe seam recognition positioning method based on magnetic flux leakage |
| CN114156044A (en) * | 2021-12-03 | 2022-03-08 | 四川大学 | Laminated steel pipe magnetic yoke type uniform magnetization device |
-
2000
- 2000-09-21 CN CN 00254294 patent/CN2446518Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796867A (en) * | 2017-10-30 | 2018-03-13 | 林州凤宝管业有限公司 | Steel pipe magnetic leakage crack detection method |
| CN108941357A (en) * | 2018-06-12 | 2018-12-07 | 四川大学 | A kind of steel pipe seam recognition positioning method based on magnetic flux leakage |
| CN114156044A (en) * | 2021-12-03 | 2022-03-08 | 四川大学 | Laminated steel pipe magnetic yoke type uniform magnetization device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |