GB1509696A - Arrangement for the inspection of transverse weld seams of a large-diameter steel pipe - Google Patents
Arrangement for the inspection of transverse weld seams of a large-diameter steel pipeInfo
- Publication number
- GB1509696A GB1509696A GB3403676A GB3403676A GB1509696A GB 1509696 A GB1509696 A GB 1509696A GB 3403676 A GB3403676 A GB 3403676A GB 3403676 A GB3403676 A GB 3403676A GB 1509696 A GB1509696 A GB 1509696A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe
- signal
- disc
- motor
- line
- 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.)
- Expired
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- 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
1509696 Detecting flaws magnetically F FORSTER 16 Aug 1976 [10 Oct 1975] 34036/76 Heading G1N Transverse weld seams of a steel pipe-line are inspected by means of a flux leakage detecting probe including a continuous magnetic recording means, the probe being driven through the pipeline by a drive unit which is arranged to be stopped when the recording medium faces a weld. A weld seam 3 of pipe-line 1 is encompassed by an electrical conductor 11 enclosed by a plurality of U-shaped iron stirrups 15 connected by a strip 19 of electrically non-conductive material to form a closed magnetic circuit within the adjacent part of the pipe-line so that when conductor 11 is energized the weld seam 3 is magnetized in the longitudinal direction of the pipe-line. An inspection carriage 9 is driven through the pipe-line 1 by means of three pairs of wheels 39, 40 arranged at angles of 120 degrees relative to one another and by motor 45. The front end of housing 41 is provided with a hollow shaft 71 rotatably driven by motor 63 and the shaft 71 has fastened thereto a disc 83 having a spring 99 biased swivel arm 87 pivotably mounted thereto. Pivoted on the swivel arm 87 by journal 111 is a cylinder 109 of a storage body 89 covered by a flexible storage tape Fig. 2 (not shown) so that as the disc 83 rotates anti-clockwise the storage body and tape rolls in an anti-clockwise direction on the internal wall of the pipe 1. In operation the carriage 9 is moved in the direction of arrow 133 by energizing motor 45 at the same time as a solenoid 101, whose armature is connected to an extension 107 of the swivel arm 87, is energized so that the upper portion of the swivel arm carrying the storage body 89 is pulled away from the pipe wall. When a signal receiver 79 such as a magnetic probe mounted on a vertical counter weighted beam 75 rotatably secured to projection 73 of housing 41 comes into facing alignment with a signal transmitter 23 e.g. a magnet which locally magnetizes the pipe wall a signal is generated which via a signal processing circuit (not shown) changes over gear-box 47 of the motor 45 to slow speed. The slowly moving carriage 9 is then stopped by a second signal generated when the receiver 79 faces signal transmitter 25 and which is arranged at a distance from field unit 5 so that the unit 5 and storage unit 89 face one another. Stopping of the carriage 9 actuates the magnetizing unit and motor 63 which starts the rotation of disc 83 and hence the scanning of the weld by the storage body 89, solenoid 101 being deenergized so that the body 89 and brush 127 come into sliding contact with weld seam 3. Magnetic stray fluxes emerging at the defects are stored in the tape read by a read head and then erased by an erase head, Fig. 2 (not shown). The signals read out are fed to a chart recorded via cable 72. In order to relate the defect signals with the location of the defects on the circumference of the pipe a plurality of magnets 129, 131 are sunk in the rear face of a disc 83 rotated by motor 63, the magnets being equally angularly spaced around the disc so that a signal is generated at receiver 81 as they pass the latter. Magnet 129 is reverse poled to produce a different signal. A signal transmitter can be mounted on beam 75 and a plurality of receivers mounted on disc 83. A single transmitter and receiver may be employed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752545370 DE2545370A1 (en) | 1975-10-10 | 1975-10-10 | ARRANGEMENT FOR CHECKING THE CROSS-WELD SEAM OF A LARGE-CALIBER STEEL PIPE |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1509696A true GB1509696A (en) | 1978-05-04 |
Family
ID=5958805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3403676A Expired GB1509696A (en) | 1975-10-10 | 1976-08-16 | Arrangement for the inspection of transverse weld seams of a large-diameter steel pipe |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2545370A1 (en) |
FR (1) | FR2327540A1 (en) |
GB (1) | GB1509696A (en) |
IT (1) | IT1072992B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3228818A1 (en) * | 1981-08-07 | 1983-03-10 | Kubota Ltd., Osaka | TEST DEVICE FOR LINE PIPES |
CN109187735A (en) * | 2018-11-09 | 2019-01-11 | 成都熊谷油气科技有限公司 | Testing agency and detection method in a kind of in-service long-distance transport pipes boxing seam defect magnetic powder |
CN118329779A (en) * | 2024-06-13 | 2024-07-12 | 杭州同华生态环境科技有限公司 | Automatic sample injection device for phytoplankton detection |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2396293A1 (en) * | 1977-07-01 | 1979-01-26 | Sumitomo Metal Ind | Fault testing system for steel tube internal wall - utilises magnetic field on outer wall with sensor inside |
DE2838388C3 (en) * | 1978-09-02 | 1981-05-14 | Institut Dr. Friedrich Förster Prüfgerätebau, 7410 Reutlingen | Rotary head for testing elongated ferromagnetic test material with a circular cross-section |
SU1499209A1 (en) * | 1986-07-02 | 1989-08-07 | Белорусский Политехнический Институт | Magnetizing device for magnetographic check of articles |
DE3638936A1 (en) * | 1986-11-14 | 1988-05-26 | Kernforschungsz Karlsruhe | METHOD AND DEVICE FOR DETECTING CORROSION OR THE LIKE |
CN105571785A (en) * | 2016-02-01 | 2016-05-11 | 常熟理工学院 | Barrel wall automatic leak detection device applied to oil barrel remanufacturing |
CN116539668B (en) * | 2023-07-06 | 2023-08-29 | 北京洞微科技发展有限公司 | Device and method for detecting thermite welding quality of steel rail |
-
1975
- 1975-10-10 DE DE19752545370 patent/DE2545370A1/en not_active Withdrawn
-
1976
- 1976-08-16 GB GB3403676A patent/GB1509696A/en not_active Expired
- 1976-10-01 FR FR7629514A patent/FR2327540A1/en active Granted
- 1976-10-07 IT IT2807176A patent/IT1072992B/en active
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3228818A1 (en) * | 1981-08-07 | 1983-03-10 | Kubota Ltd., Osaka | TEST DEVICE FOR LINE PIPES |
US4560931A (en) * | 1981-08-07 | 1985-12-24 | Kubota, Ltd. | Self-propelled mobile pipeline inspection apparatus and method for inspecting pipelines |
CN109187735A (en) * | 2018-11-09 | 2019-01-11 | 成都熊谷油气科技有限公司 | Testing agency and detection method in a kind of in-service long-distance transport pipes boxing seam defect magnetic powder |
CN109187735B (en) * | 2018-11-09 | 2024-03-26 | 成都熊谷油气科技有限公司 | In-service long-distance pipeline girth weld defect magnetic powder internal detection mechanism and detection method |
CN118329779A (en) * | 2024-06-13 | 2024-07-12 | 杭州同华生态环境科技有限公司 | Automatic sample injection device for phytoplankton detection |
Also Published As
Publication number | Publication date |
---|---|
IT1072992B (en) | 1985-04-13 |
DE2545370A1 (en) | 1977-04-21 |
FR2327540B3 (en) | 1979-06-08 |
FR2327540A1 (en) | 1977-05-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |