• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to mechanical engineering, in particular, to the testing of screws, plugs in pressure tanks of reactors. Pel invention - reducing test time. When testing threaded products, the screw 1 rotates and the induction test probe is moved along the generatrix of the screw. The coils 9, powered by alternating current, are oriented in the transverse direction relative to the threading of the screw and their field covers at least two turns of the thread. This makes it possible to check the end cylindrical zones and transitional areas on the studs for pressure tanks in one working pass. The test time is shortened at least by a factor of two. 2 Il.
    公开号:SU1466662A3
    申请号:SU853960444
    申请日:1985-10-04
    公开日:1989-03-15
    发明作者:Майер Вернер；Фридрих Эдгар；Модлих Эрих
    申请人:Сименс Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to mechanical engineering, in particular to testing screws, studs in pressure vessels of reactors.
    The purpose of the invention is the reduction of test time.
    Figure 1 shows the relative position of the tested threaded product (screw, stud) and induction probe, side view; figure 2 scan screw (studs).
    The method is as follows.
    The tested threaded product (screw, stud) 1 with a thread made on a cylindrical surface 2 having projections 3, depressions 4 and side surfaces 5 is rotated around axis 6, and an induction test probe in the form of a housing 7 made of insulating material with contact surface 8 is moved along the generatrix screw, while the coils 9, through which a high-frequency alternating current flows, are oriented in the transverse '• direction relative to the thread of screw 1 and' their field covers at least two threads.
    The housing 7, it is advisable to perform molded from plastic, for example from plexiglass or Teflon. It may have a curved contact surface 8 · corresponding to the surface of the screw or stud. However, surface 8 may be flat to use a probe for testing screws of various diameters. The housing has a square shape with a square cross section, the length of the edges of which is, for example, 50 mm Consequently, the contact surface 8 has a size of 50X50 mm. The radius of curvature of this surface is 110-112 mm.
    When testing a screw (stud) 1, designed to fix the lid on pressure vessels of reactors, with a diameter (Г>) of 220 mm, a length (L) of 2500 mm and a thread (220) of 220 × 8, the probe is installed until the surface 8 touches parallel to axis 6 of the screw , with screw thread surface. Two induction coils 9 with a square cross-section are connected параллельно one to the other in parallel and placed in the housing 7. The length of the sides of the square section of the coils is 25 mm. The magnetic field of the coils in the embodiment may span three turns of thread. Coils are made of numerous turns of copper wire with a thickness of, for example, 0.05-0.5 mm and are located at a distance A from one another, which is within the size of the coils. The coils have a straight section 10 and are connected using the connecting wires 11 and cable 12 with an induction testing device 13.
    In the induction test, one of the coils-9 is powered by a high-frequency alternating current, for example, with a frequency of 25 or 100 kHz, In the device 13, in a known manner, the voltages in the other coil resulting from magnetic coupling through screw 1 are evaluated. The latter rotates around axis 6 (by arrow 14), and the probe moves parallel to axis 6 (along arrow 15). As a result, a helical-shaped test path is formed, in which several turns of thread from the outer sides of the thread profile to the bottom are covered in one working passage. troughs 4.
    Using the proposed probe, in addition to the threaded zone, it is also possible to check the end cylindrical zones and transition sections on the studs for pressure vessels of the reactors for ... one single working pass, which reduces the test time by at least two times.
    权利要求:
    Claims (1)
    [1]
    Claim.
    A method for testing screws with an induction test probe with at least one coil, through which a high-frequency alternating current flows, located in a housing made of insulating material, in which the screw is rotated, and the housing with the coil is contacted along the generatrix of the screw, characterized in that ,. in order to reduce test time, the coil is oriented in the transverse direction relative to the stroke of the scurvy thread and at least two threads are covered with its field.
    • 1466662 φυ .2
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1466662A3|1989-03-15|Method of testing screws by induction testing probe
    CN1225167A|1999-08-04|Eddy current inspection technique
    US4507610A|1985-03-26|Apparatus for electromagnetically detecting flaws in metallic objects
    KR920016988A|1992-09-25|Metal body discrimination device
    PL120606B1|1982-03-31|Transducer of displacements
    US4764724A|1988-08-16|Measuring head for inductive measurement of the thickness of an insulating layer on an electric conductor
    US4234848A|1980-11-18|Test head for inductive surface testing having plural resonant coils held in conductive holder
    WO1986002444A1|1986-04-24|Apparatus for magnetic position determination
    GB2575104A|2020-01-01|Method and apparatus for monitoring of the multiphase flow in a pipe
    US3794913A|1974-02-26|Phase interface indicator
    NL8201178A|1983-10-17|Rudder position detector using pick=up coils - detecting changes in magnetic field due to movement of asymmetrical plate mounted on rotatable shaft
    SU1439483A1|1988-11-23|Put-on eddy-current transducer
    SU1000885A1|1983-02-28|Current-conducting part electromagnetic checking device
    SU711458A1|1980-01-25|Once-through eddy-current transducer to flaw detector
    RU2216729C1|2003-11-20|Eddy-current converter
    SU1298538A1|1987-03-23|Method of measuring internal diameter of metal tube
    JP3200721B2|2001-08-20|Gap measurement tool
    SU879278A1|1981-11-07|Device for measuring dielectric material thickness
    SU555331A1|1977-04-25|Eddy Current Feedthrough
    JPS5958358A|1984-04-04|Electromagnetic acoustic transducer
    SU1446550A1|1988-12-23|Pass-through eddy-current converter
    SU696370A1|1979-11-05|Modulation-type once-through eddy-current transducer
    SU1460693A1|1989-02-23|Eddy-current transducer
    SU783565A1|1980-11-30|Displacement transducer
    SU1326988A1|1987-07-30|Apparatus for ulitrasonic test of articles made of ferromagnetic materials
    同族专利:
    公开号 | 公开日
    UA6088A1|1994-12-29|
    US4788499A|1988-11-29|
    FI853491L|1986-05-20|
    FI853491A0|1985-09-12|
    EP0185187A1|1986-06-25|
    DE3564865D1|1988-10-13|
    JPS61160052A|1986-07-19|
    EP0185187B1|1988-09-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2519367A|1945-07-09|1950-08-22|Gunn Ross|Method of and apparatus for detecting defects in objects|
    US2958818A|1957-05-01|1960-11-01|Sperry Prod Inc|Rail flaw detector mechanism|
    US3036266A|1958-03-28|1962-05-22|Westinghouse Canada Ltd|Electromechanical transducer|
    US3495166A|1967-04-10|1970-02-10|Magnaflux Corp|Eddy current crack detector systems using crossed coils|
    US3939404A|1974-07-10|1976-02-17|Dominion Foundries And Steel, Limited|Method of testing for and preventing the possibility of cracking, spalling or like defects in rolling mill rolls by determining the rate of change in hardness|
    SU748235A1|1978-04-19|1980-07-15|Куйбышевский Ордена Трудового Красного Знамени Авиационный Институт Им. Академика С.П.Королева|Eddy-current transducer|
    DE2817574B2|1978-04-21|1980-04-30|Kraftwerk Union Ag, 4330 Muelheim|Eddy current probe for examining metallic materials for material separation and defective inclusions|
    CA1194117A|1981-10-09|1985-09-24|Richard T. Dewalle|Method of making eddy-current probes and probes madeby the method|
    JPH1148A|1997-06-11|1999-01-06|Mitsubishi Agricult Mach Co Ltd|Ear portion-clamping device of grafting device|DE3842318C2|1988-12-16|1991-04-25|Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De|
    JP2592690B2|1989-11-09|1997-03-19|東京瓦斯株式会社|Pipe eddy current flaw detector|
    US5065635A|1990-09-14|1991-11-19|Westinghouse Electric Corp.|Apparatus and method for inspecting an item having grooves machined therein|
    US5345514A|1991-09-16|1994-09-06|General Electric Company|Method for inspecting components having complex geometric shapes|
    JP2579413Y2|1992-01-21|1998-08-27|ティーディーケイ株式会社|Magnetic sensing device|
    US5698977A|1993-10-12|1997-12-16|The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration|Eddy current method for fatigue testing|
    JP2857988B2|1995-06-07|1999-02-17|哲雄 庄子|Non-destructive inspection method and apparatus for conductive spiral specimen|
    US6703831B1|1999-11-12|2004-03-09|Quantech, Inc.|Dual eddy current probe for detecting geometrical differences especially as related to threaded apertures and studs|
    CN101498686B|2009-02-25|2011-08-03|中国石油天然气股份有限公司|Thread magnetism detector for drilling tool|
    CN101893603A|2010-08-06|2010-11-24|中国石油集团川庆钻探工程有限公司长庆钻井总公司|Thread detection device and crack detection method for drilling tool|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3442256|1984-11-19|
    [返回顶部]