Working principle The tubing corrosion and damage to surface fatigue cracks and surface grinding, its wide and crossed. Using method of horizontal flaw excitation respectively (such as corrosion, etc) and longitudinal crack defects (partial mill) axial and add to the constant magnetic field weekly drill tubing, and magnetic saturation magnetic disturbances, its flaws, magnetic leakage field, resulting in magnetic flux variation, the application of the magnetic field sensor obtained through analysis software, the size and location of the defects.
Main features High-strength permanent magnets excitation, integrated magnetic flux leakage and flux variation principle, crack, corrosion and abrasion comprehensive detection system, Assembled magnetic principle, using wide-angle hall element display is realized testers, Within the sensor bushing, collecting signal stability floating o. D. Meter, Computerized quantitative data processing system, realize the precise classification, avoid defect targets and misjudgment, Simple operation, ten minutes to get.
Performance parameters (1) the detection speed: 15-30 / min, (2) probe position precision 20mm; Tell: (3) transverse crack detection sensitivity: 0.3 mm long; Deep 30mm (4) longitudinal crack detection sensitivity: 0.5 mm long; Deep 100mm (5) hole detection sensitivity: 1.6 mm hole, (6): 4 cross-sectional area measurement precision, (7): < 30mm blind sensor, False-negatives rate: 0.5%, (8) after the demagnetization pipe remanent: 2 Oe, (9) main indexes meet and exceed the API standard (GB /, SPET5A - T12606-1999 standards.
System Unit 2 sets of testing, inspection and up-down material system and PLC control work and sensing system, signal acquisition and processing system.
Application: The oil more offshore oilfield, in order to production safety, tubing and pipe are needed.
Applicable scope: All sorts of hoisting machinery, mine hoister, oil ship, wharf, mining machine, military, water conservancy, electric power, railway, building use rope.