SU911308A1 - Scanning device for non-destructive control of cylindrical cavities - Google Patents

Description

(54) SCANNING DEVICE FOR NON-DESTRUCTIVE CYLINDRICAL CAVITY CONTROL

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The invention relates to non-intrusive means of control and can be used to control cylindrical planes, such as pipes.

. A device for flaw detection of pipes and tubes, comprising a housing, a mechanism for centering it relative to the test surface, a rotor with followers, and converters of: a flaw detector 1 are known.

A disadvantage of the known device is an increase in the amount of frictional force between the cable and the control surface as the device moves, which reduces speed as well. consequently, the performance of the control.

The closest to the technical essence of the invention is a scanning device for non-destructive testing of cylindrical cavities, containing a flaw detector transducer mounted in a holder with rolling support elements, connected to the holder a flexible shaft with a drive, a cable placed inside the shaft and intended to connect the transducer through a current collector with the measuring channel of the flaw detector, and self-centering supports of the flexible shaft 12.

The disadvantage of the device is a low A performance control.

The purpose of the invention is to increase the p | X) performance of the control.

The goal is achieved by the fact that the drive of the flexible shaft is made in the form of a drum mounted with the possibility of rotation in two mutually perpendicular planes,

10, one end of the flexible shaft is fixed on the drum, the supports are made with central apertures in the form of a bent cone, the device is equipped with a storage device for accommodating the supports installed under the drum, and grippers with a number of supports fixed in a definite pitch on the shaft and made in the form of truncated -: A cone whose dimensions coincide with the size of the hole in the corresponding support.

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Claims (2)

In addition, to ensure uniformity of movement of the converter, the device is equipped with an overrunning clutch mounted inside the drum and connecting its axis. 39 The drawing shows a diagram of the device. The scanning device contains bases 1, made in the form of a glass with a hole in the bottom, a disk 2 with ring gears 3 and 4 and a gear 5, installed with a sub-head 6 on the base 1, a cover 7, ring gears 8 and 9, mounted on the bottom of the base 1, sleeve 10 with supports 11, mounted with a bearing 12 in the opening of the bottom of base 1, a drive 13 attached to the base 1, a winch made in the form of a drum 14 with two semi-axes 15 and 16 fixed in the supports 11, and an overrunning clutch 17 connecting the axles 15 and 16 of the drum 14. Overtaking and the clutch 17 provides a free slippage during operation the drum 14 about the axis 18 while rotating in one direction and generates a constant frictional engagement point semiaxes 15 and 16 with the drum 14 as it rotates in the reverse direction. Gears 19 and 20, mounted on pinhoos x 15 and 16 of the drum, engage with gears 3 and 9, 4 and 8, respectively. An electric motor (not shown) ensures the rotation of the drum in two mutually perpendicular to the bores of the flexible shaft BOKpjT axis around the axis 18. The holder 21 is equipped with an rtp generator 22 of the flaw detector with rolling support elements 23 that are in contact with the internal surface of the controlled 24. Converter holder 21 it is connected by a flexible shaft 25 to a drum 14. The flexible shaft supports 26 are disks with radially spring-loaded rolling elements 27 and with a central version in the form of a truncated cone. Inside the flexible shaft 25 there is an electrical two-wire cable (not shown) designed to connect the flaw detector transducer 22 to the measuring channel 28 thereof. By the number dhop 26, the grips 29 are fixed with a certain schag on the flexible shaft 25 and made in the form of truncated cones, the dimensions of which coincide with the size of the hole in the corresponding support 26. At the same time, the holes in the supports 26 add up to a single truncated cone. The gears 19 and 20 are mounted on the axis of the drum 14 at different distances. The axles 15 and 16 of the drum 14, as well as the base 1, are made hollow of an electrically conductive material. The cable passes through the halfway and contacts one wire to gear 19, another wire to gear 20, and a pair of gears 19 and 9 and respectively 20 and 8 are current. puller Before Starting, the device is fixed at the end of the test tube 24. When the handle 5 is rotated, the drum 14 is rotated in mutually perpendicular planes with gears 3, 4, 8 and 9 and gear wheels 19 and 20. In this case, the flexible shaft 25 communicates The holder 21 rotates around an axis that coincides with the axis of the pipe being monitored 24. The rolling elements 23 roll around the inner surface of the pipe 24 and carry the holder 21 with the transducer 22 of the flaw detector, and the overrunning clutch 17 ensures that the drum 14 slides relative to the axis 18 and thereby winding the flexible ap 25. As the holder 21 moves inside the tube 24, the grippers 29 carry the supports 26 alternately in their geometrical dimensions and lead them out of the accumulator 13. Further movement of the supports 26 along the inner surface of the pipe is facilitated by the elements 27, which reduces the resistance to movement of the flexible shaft 25. When a defect is detected, the signal from the converter 22 is fed via a cable through the current collector (gears 19 and 20 and ring gears 8 and 9) to the measuring channel 28 of the Fault Finder. At the end of the control process, handwheel 5 gears 19 and 20 is attached to the reverse rotation and winding of the flexible shaft onto the drum 14 occurs, which, carried along by the grippers 29, returns the supports 26 to the initial position in the accumulator 13. Using the scanning device will ensure the possibility of productive control the surface of the cavity in a hard-to-reach place, and in the folds. Claim 1. Scanning device for non-destructive testing of cylindrical cavities, containing a flaw detector transducer installed in a holder with rolling support elements, a flexible drive shaft connected to the holder, a cable placed inside the shaft and connected to the transducer through the current collector and the flaw detector channel Self-centering flexible shaft bearings, characterized in that, in order to increase the productivity of the control, the flexible shaft drive is designed as a drum Anchored to rotate in two mutually perpendicular planes, one end of the flexible shaft is fixed to the drum, the supports are made with central apertures in the shape of a truncated cone, the device is equipped with a storage device for accommodating the supports located under the base unit 5. and grippers according to the number of supports, fixed with a certain step on the shaft and sent out in the form of a truncated cone, the size of which coincides with the size of the hole in the corresponding support. 2. The device according to claim 1. that, in order to ensure a uniform transducer rotation, it is provided with an overrunning clutch, mounted inside the drum and its connecting axis. Sources of information taken into account with "" "P ™". 1 Copyright certificate SSSRG430315. cl. G 01 N 27/86, 1972. 2. Accepted order N 1488833. cl. G 01 N 27/86, 1977 (protopsh). .  rf (Iff ff S t g