GB1488833A - Non-destructive testing - Google Patents

Non-destructive testing

Info

Publication number
GB1488833A
GB1488833A GB1973274A GB1973274A GB1488833A GB 1488833 A GB1488833 A GB 1488833A GB 1973274 A GB1973274 A GB 1973274A GB 1973274 A GB1973274 A GB 1973274A GB 1488833 A GB1488833 A GB 1488833A
Authority
GB
United Kingdom
Prior art keywords
probe
tube
head
unit
rotary transformer
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
Application number
GB1973274A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB1973274A priority Critical patent/GB1488833A/en
Publication of GB1488833A publication Critical patent/GB1488833A/en
Expired legal-status Critical Current

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
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9093—Arrangements for supporting the sensor; Combinations of eddy-current sensors and auxiliary arrangements for marking or for rejecting
    • 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
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9013—Arrangements for scanning
    • G01N27/902—Arrangements for scanning by moving the sensors

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

1488833 Eddy current pipe pig UNITED KINGDOM ATOMIC ENERGY AUTHORITY 18 April 1975 [6 May 1974] 19732/74 Heading GIN Non-destructive testing apparatus for electromagnetic examination of a heat exchanger tube T includes an elongate, generally flexible probe unit for insertion and movement along the inside of the tube and having a cylindrical probe head 1 with a radially extending electromagnetic probe 2 and the unit further comprising an electric motor 3 with speed reduction gearing 5 for rotating the probe head about its longitudinal axis; the probe having an exciting coil for creating an electromagnetic field and at least one sensing coil for detecting disturbances in the field caused by irregularities in the tube. Preferably the unit also has a flexible coupling 4 drivingly connecting the motor to the probe head and a rotary transformer 6 between the motor and probe head for transmitting signals from the head to static cables 7 extending to visual display apparatus comprising an oscilloscope and chart recorder outside the tube. The unit has spaced nylon beads 8 and a pilot guiding head 9 bearing against the tube wall to facilitate passage of the unit. Probe head, Fig. 2d (not shown). A rotor (11) is mounted on ball bearings (12) in a two-part housing (13a, b) and has a flexible drive cable (15) rotatable in a tube (16). The probe has a ceramic protective tip (14), an exciting coil and two differentially-connected spaced sensing coils wound about a ferrite core. The tube (16) is connected to a tube (27) Fig. 2c (not shown) of the flexible coupling 4 by a screwed sleeve (29). Alternative embodiment Figs. 3a, b (not shown) The probe unit comprises a drive assembly (51) and driven assembly (52), the former having a tubular housing (53) for an electric motor (54), reduction gearing unit (55) and rotary transformer (56). The driven assembly has a probe head (73) and a flexible drive cable (74) coupling the head to the transformer rotor (62). The head carries a ceramictipped probe (75). At the hindmost end of the rotary transformer is a light-emitting diode and photo-sensitive transistor arrangement to generate an indexing signal to identify the circumferential position of a defect being examined. The housing (53) has an extension (61), for the rotary transformer, to which an end fitting (71) is screwed which has a screw thread connection (72) for the driven assembly.
GB1973274A 1975-04-18 1975-04-18 Non-destructive testing Expired GB1488833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1973274A GB1488833A (en) 1975-04-18 1975-04-18 Non-destructive testing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1973274A GB1488833A (en) 1975-04-18 1975-04-18 Non-destructive testing

Publications (1)

Publication Number Publication Date
GB1488833A true GB1488833A (en) 1977-10-12

Family

ID=10134278

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1973274A Expired GB1488833A (en) 1975-04-18 1975-04-18 Non-destructive testing

Country Status (1)

Country Link
GB (1) GB1488833A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009575A1 (en) * 1978-08-28 1980-04-16 Kraftwerk Union Aktiengesellschaft Device for inspecting heat exchanger tubes
EP0090725A1 (en) * 1982-03-26 1983-10-05 Framatome Inspection device for the tube plate of a heat exchanger
US4560931A (en) * 1981-08-07 1985-12-24 Kubota, Ltd. Self-propelled mobile pipeline inspection apparatus and method for inspecting pipelines
EP0201814A2 (en) * 1985-05-13 1986-11-20 Combustion Engineering, Inc. Self-orienting conduit probe
EP0471556A1 (en) * 1990-08-13 1992-02-19 Westinghouse Electric Corporation Flexible delivery system for a rotatable probe
US5174165A (en) * 1990-08-13 1992-12-29 Westinghouse Electric Corp. Flexible delivery system for a rotatable probe
WO1993013413A1 (en) * 1991-12-30 1993-07-08 Zetec, Inc. Probe apparatus
US5398560A (en) * 1993-07-12 1995-03-21 The United States Of America As Represented By The United States Department Of Energy Apparatus for inspecting piping
CN105378470A (en) * 2013-07-10 2016-03-02 斯奈克玛 Device for inspecting the surface of an electrically conductive part

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009575A1 (en) * 1978-08-28 1980-04-16 Kraftwerk Union Aktiengesellschaft Device for inspecting heat exchanger tubes
US4560931A (en) * 1981-08-07 1985-12-24 Kubota, Ltd. Self-propelled mobile pipeline inspection apparatus and method for inspecting pipelines
EP0090725A1 (en) * 1982-03-26 1983-10-05 Framatome Inspection device for the tube plate of a heat exchanger
EP0201814A2 (en) * 1985-05-13 1986-11-20 Combustion Engineering, Inc. Self-orienting conduit probe
US4703264A (en) * 1985-05-13 1987-10-27 Combustion Engineering, Inc. Self-orienting conduit probe
EP0201814A3 (en) * 1985-05-13 1988-06-01 Combustion Engineering, Inc. Corporate Patent Counsel Self-orienting conduit probe
EP0471556A1 (en) * 1990-08-13 1992-02-19 Westinghouse Electric Corporation Flexible delivery system for a rotatable probe
US5174165A (en) * 1990-08-13 1992-12-29 Westinghouse Electric Corp. Flexible delivery system for a rotatable probe
WO1993013413A1 (en) * 1991-12-30 1993-07-08 Zetec, Inc. Probe apparatus
US5279168A (en) * 1991-12-30 1994-01-18 Timm Stephen D Probe apparatus
US5398560A (en) * 1993-07-12 1995-03-21 The United States Of America As Represented By The United States Department Of Energy Apparatus for inspecting piping
CN105378470A (en) * 2013-07-10 2016-03-02 斯奈克玛 Device for inspecting the surface of an electrically conductive part

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee