JPS62116522U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a rotating transformer as an embodiment of the present invention, and FIG. 2 is a diagram showing a comparison of measured values of frequency-signal transmission loss characteristics between a conventional rotary transformer and a rotary transformer according to the present invention. Fig. 3 is a schematic cross-sectional view showing an embodiment of a rotary flaw detection device using a rotary transformer according to the present invention as a signal transmission means, and Fig. 4 is a schematic diagram showing a rotating disc section on the front side of the rotary flaw detection device of Fig. 3. , FIG. 5 is a perspective view showing the detailed structure of the rotating drum of the rotary flaw detection device shown in FIG. Fig. 8 is a diagram schematically showing a steel pipe as an example of the material to be inspected; Fig. 9A
9 is a diagram showing an example of flaw detection recorded by the electromagnetic flaw detection sensor in the apparatus of FIG. 3 for the steel pipe of FIG. 8;
Figure B is a diagram showing an example of flaw detection recorded by the ultrasonic flaw detection probe in the apparatus in Figure 3 for the steel pipe in Figure 8, Figure 10 is a sectional view showing an example of a conventional rotary transformer, and Figure 11 is a conventional A schematic cross-sectional view of the rotary probe flaw detection mechanism of the rotary flaw detection device, FIG.
Schematic diagram showing the rotating disk section on the front side of the device shown in Figure 1.
FIG. 3 is a schematic plan layout showing a conventional device configuration for performing electromagnetic flaw detection and ultrasonic flaw detection on the same line, and FIG. 14 is a schematic side view of the device configuration shown in FIG. 13. 30... Fixed frame, 31... Bearing, 32... Rotating cylinder, 32A... Rotating shaft, 33... Disc-shaped metal base, 34... Disc-shaped metal base, 35... Gap,
36, 37, 38, 39... annular groove, 40, 41
, 42, 43...Resin molded soft magnet, 4
4, 45, 46, 47...Signal transmission coil, 4
4A, 45A, 46A, 47A...Lead wire, 1
01... Base plate, 102, 103... Bearing, 1
04... Rotating disk, 105... Rotation drive pulley, 108... External fixed frame, 109... Exciter, 1
09A...excitation coil, 109B...excitation magnetic pole,
111...Size adjustment mechanism, 111A...Size adjustment knob, 112...Sensor support rod, 113...
...Pivot, 114...Movable arm, 115...Balance weight, 200...Rotary flaw detection device, 201
... Rotating drum, 202, 203 ... Water passage, 2
04... Water passage forming body, 205, 206... Water passage, 210, 211... Water flow hose, 212...
...Sensor, 213...Sensor holder, 214...
Shock absorber, 53, 54...disk-shaped metal base, 55...resin molded soft magnet.

Claims (1)

[Claims for Utility Model Registration] (1) Two base bodies arranged opposite to each other with a gap therebetween so as to share a rotational axis and moving relative to each other concentrically, and facing surfaces of each base body. An annular groove concentric with the rotation axis is formed at the position, a resin-molded soft magnet is filled in the annular groove, and a signal transmission coil is embedded in the resin-molded soft magnet. A rotary transformer characterized in that both are magnetically coupled to each other. (2) The rotating transformer according to claim 1, wherein the base body is made of metal. (3) The rotary transformer according to claim 1 or 2, wherein the resin-molded soft magnet is made of a kneaded product of soft ferrite powder and resin. (4) The base body is a disc-shaped body having a central opening extending in the direction of the rotation axis, and the annular groove is formed on a surface of the disc-shaped body perpendicular to the rotation axis. Scope of claims for patent registration, paragraph (1) or (
The rotating transformer described in paragraph 2) or paragraph (3).