JP2835115B2 - Pipe outer surface scanning device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scanning device that scans the outer surface of a pipe, and more particularly to a pipe outer surface scanning device that can scan the entire surface.

[Conventional technology]

When updating or maintaining equipment piping used in a building and piping used in a plant, it is necessary to accurately grasp the state of deterioration of the piping. For this reason, diagnosis of the deterioration state is performed from the surface of the pipe using an ultrasonic sensor or the like. The diagnosis is often made manually.

[Problems to be solved by the invention]

However, a great deal of labor and time is required when using human power. For this reason, the development of an automatic inspection device has been advanced.

The present invention has been made in view of the above situation, and has as its object to provide a pipe outer surface scanning device that automatically scans the entire surface of a pipe.

[Means for solving the problem]

In order to achieve the above object, a combination of a pipe axial movement device and a pipe outer surface full-circumference device using an internal gear is provided, and the pipe outer surface scanning device of the present invention includes a traveling device provided with wheels, at least two traveling devices. A plate having an opening at the center, which is dividable as described above, has a traveling device mounting portion for attaching the traveling device to one surface so that the traveling direction of the wheel is orthogonal to the one surface, and A support plate having a circumferential guide track which can be divided into surfaces, a center having the same center as the center of the circumference of the guide track, and a circumferential internal gear which can be divided; and a traveling vehicle which runs on the guide track. It is characterized by comprising a gear meshing with the internal gear, and a revolving head having a drive device for rotating the gear. Further, it is preferable that the traveling device mounting portion is configured such that the traveling device is movable in a radial direction of a circumference of the guide track and can be fixed at a desired position. Further, it is preferable that three or more traveling devices are provided, and at least one of the traveling devices includes a driving device that rotationally drives the wheels. The guide track is formed of two concentric tracks, and at least two of the wheels of the traveling vehicle travel on one of the two tracks and at least one of the wheels travels on the other track. Good to do.

[Action]

The support plate, the guide track attached to this support plate, and the internal gear can be divided, so when attaching the pipe outer surface scanning device to the pipe, divide them so that the pipe becomes the center of this device. This device can be attached to the pipe by connecting these divided parts. This device can be moved in the axial direction of the pipe by the traveling device, and the traveling carriage of the revolving head rides on the guide track, and the gear meshed with the internal gear concentric with the guide track is rotated by the rotary drive device to rotate. The circumference head rotates 360 degrees freely around the pipe. If an inspection device such as an ultrasonic sensor is mounted on the circulating head, the entire outer surface of the pipe can be inspected.

Further, by moving the traveling device to the traveling device mounting portion in the radial direction of the guide track and fixing it at a desired position, even if the diameter of the pipe changes, the present scanning device can be mounted in accordance with the pipe.

Further, by attaching three traveling devices, for example, at a pitch of 120 degrees, the main scanning device can be moved in the axial direction of the piping while the center of the piping and the center of the main scanning device are aligned. At this time, the number of traveling devices provided with a rotary drive device may be determined according to the required driving force of the drive wheels. When scanning a vertical pipe, it is preferable that two or more traveling devices have a driving device, and when scanning only a horizontal piping, one traveling device may have a driving device.

In addition, the guide track is made of two concentric circles, and at least two of the wheels of the traveling carriage of the revolving head run on one of them, and at least one of them runs on the other. Then, even if these three wheels are arranged within 180 degrees, the traveling carriage can be supported without play. In order to support the traveling vehicle on one track without play, it is necessary to arrange a minimum of three wheels in a range of 180 degrees or more. If the wheels are arranged within 180 degrees and the guide track is divided into two parts, the traveling head can be attached to the pipe even if the revolving head is not divided but integrated.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a transverse sectional view showing the configuration of the present embodiment. This embodiment shows an apparatus that can be divided into two. The traveling device 1 with a driving device is a traveling motor that is rotationally driven.
11 and a coupling 12 for transmitting the output of the traveling motor 11
A gear 13 connected to the coupling 12 and the shaft, a gear 14 transmitting the rotational force of the gear 13, a shaft 15 transmitting the rotational force of the gear 14, and a bevel gear 16 coupled to the shaft 15. , 1
7, wheels 18, 19 provided on the same axis as the bevel gears meshing with the bevel gears 16, 17, and a traveling device supporting plate 10 that supports these wheels. The traveling device 2 without a driving device includes a traveling device support plate 20, wheels 21, 23, and wheels 21, 23.
Shaft holes 22 and 24 for supporting 23. The shaft holes 22, 24 are provided at positions corresponding to the diameter of the pipe. The support plate 3 is a halved disk having an opening slightly larger than the target pipe in the center. An auxiliary support plate 31 of the same shape is provided, and a flange 32 is attached to a half portion of each of the support plates 3 and 31. By joining the flanges with bolts, the support plates 3 and 31 are split into two. 31 is united. The traveling device 1 with a driving device is mounted on the support plate 3 and the auxiliary support plate 31.
Traveling device mounting part, which can move in the radial direction of the support plate 3 and can determine and fix the position according to the diameter of the pipe to be inspected.
33 and 34 are provided. In the present embodiment, the holes are elongated and realized by bolting. The traveling device support plate 20 of the traveling device 2 without a driving device is fixed to the support plate 3 and the auxiliary support plate 31. An inner track 35 and an outer track 36 concentric with the support plate 3 are provided on the surface of the support plate 3 to which the traveling devices 1 and 2 are not attached. The outer diameter of the outer track 36 is the same as the outer diameter of the support plate 3. The outer race 36 has an internal gear 37 of the same diameter.
Is attached. These inner and outer tracks 35, 36 and internal gear 3
7 is divided into two at the same position as the support plate 3. The revolving head 4 includes a traveling vehicle 41 on the inner track 35 and the outer track 36, an inner wheel 42 traveling on the inner track 35 and an outer wheel 43 traveling on the outer track 36 by the vehicle of the traveling vehicle 41, A gear 44 meshing with the gear 37, a bevel gear 45, 46 for transmitting a rotational force to the shaft of the gear 44, a coupling 47 for connecting the shaft of the bevel gear 46, and a rotation connecting to the coupling 47 And a head drive motor 48.

FIG. 2 is a view taken in the direction of arrows AA in FIG. There are two traveling devices 1 with a driving device, and one traveling device 2 without a driving device, and these are fixed to the support plate 3 and the auxiliary support plate 31 at intervals of 120 degrees.

FIG. 3 is a view taken in the direction of arrows BB in FIG. When the gear 44 meshing with the internal gear 37 is rotated by the rotation head drive motor 48, the rotation head 4 rotates freely by 360 degrees.

FIG. 4 shows the traveling carriage 41 as viewed in the direction of arrows CC in FIG. Since the traveling vehicle 41 is configured to be within 180 degrees, it can be easily incorporated into the inner and outer tracks 35 and 36. When the three inner wheels 42 travel on the inner track 35 and the two outer wheels 43 travel on the outer track 36, the traveling vehicle 41 can move smoothly without any play during traveling.

FIG. 5 is a view taken in the direction of arrows D-D in FIG. The traveling carriage 41 is provided with a support arm 49 that supports the inspection device indicated by a two-dot chain line.

The driving device is provided with an encoder for measuring the number of rotations of the shafts of the wheels 18 and 19 of the traveling device 1 and the shaft of the gear 44 meshing with the internal gear 37. Has been fed back.

Next, the operation of the device configured as described above will be described.

The apparatus can be easily divided into two parts by removing the bolts of the flange 32. When assembling this device in a divided state, the diameter of the pipe to be attached is measured, and based on this, the mounting position of the traveling device 1 with a driving device is determined, and the traveling device 1 is fixed at the traveling device mounting portions 33, 34. I do. In addition, the traveling device 2 without the driving device has the wheel 2 in the shaft holes 22 and 24 corresponding to the measured values.
Attach 1,23. Next, the carriage 41 of the revolving head 4 is put on the inner track 35 and the outer track 36, and the gear meshes with the internal gear 37.
After meshing the 44 with the internal gear 37, the target pipe is inserted into the center, and the flange 32 is fixed with bolts. Next, an inspection device is attached to the support arm 49, and the inspection preparation is completed.

Inspection can be performed by driving the traveling motor 11 to move the apparatus to a position to be inspected and driving the traveling motor 11 and the rotating head drive motor 48 at a predetermined speed to scan the entire surface of the pipe to be inspected. .

〔The invention's effect〕

As is clear from the above description, the present invention can scan the entire surface of the target pipe by attaching the traveling device and the circulating head to the support plate that can be divided into a plurality of pieces.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the configuration of an embodiment of the present invention, FIG. 2 is a view taken on line AA of FIG. 1, FIG. 3 is a view taken on line BB of FIG. 1, and FIG. FIG. 5 is a view taken along the line CC of FIG. 1, and FIG. 5 is a view taken along the line DD of FIG. DESCRIPTION OF SYMBOLS 1 ... Traveling device with a drive device 2 ... Traveling device without a drive device 3 ... Support plate 4 ... Rotating head 11 ... Traveling motor 35 ... Inner track 36 ... Outer track 37 ... Internal gear 41 ... … Travel truck 48 …… Circulating head drive motor

Claims (4)

(57) [Claims] 1. A traveling device provided with wheels and a plate which can be divided into at least two or more and has an opening at a central portion, and the traveling device is provided on one surface with the traveling direction of the wheel being one of the two. A circumferential guide track having a traveling device mounting portion mounted to be orthogonal to the surface and dividable on the other surface, and a divisible circumferential internal gear having the same center as the center of the circumference of the guide track. An outer surface of a pipe, comprising: a support plate provided with: a traveling truck that travels on the guide track; a gear meshing with the internal gear; and a rotating head having a driving device that rotationally drives the gear. Scanning device. 2. The outer surface scanning of a pipe according to claim 1, wherein said traveling device mounting portion is configured such that said traveling device is movable in a radial direction of a circumference of said guide track and can be fixed at a desired position. apparatus. 3. The vehicle has three or more traveling devices, and at least one
3. A pipe outer surface scanning device according to claim 1, further comprising a drive device for rotating and driving said wheels. 4. The guide track comprises two concentric tracks, at least two of the wheels of the traveling carriage travel on one of the two tracks and at least one of the wheels travels on the other track. 4. The method according to claim 1, wherein:
An outer surface scanning device for a pipe according to any one of the above.