JPH04147055A - Work apparatus - Google Patents

Abstract

PURPOSE:To set up a bogie without reference to a flat or curved working plane and corresponding to a change of curvature also by setting up the bogie on a working plane through belts for a running guide and running this along those belts with a regular or reverse revolution of a driving wheel. CONSTITUTION:A bogie 3 is arranged to the position nearby a weld line of a pipe 1, and the bogie 3 is set up to the pipe 1, pressed against the outside of the pipe by two steel belts 13 while the belts are fixed to the pipe 1, wound through the outsides of a driving wheel 11 and a driven wheel 12. The bogie 3 runs circumferentially on the outside surface of the pipe 1 along the belts 13 because the belts 13 is fixed to the pipe 1 when a motor 10 is started and the driving wheel 11 is revolved and driven. A detector 4 loaded to the bogie 3 is moved to the direction rectangular with the running direction of the bogie 3 by a locomotive mechanism 5. Thus, the bogie 3 does not fall even if the working plane is vertical, runs along the working plane with the regular or reverse revolution of the driving wheel 11 even if in the curved plane, and can correspond to a change of the pipe diameter by changing the lengths of the belts 13.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a working device for inspecting piping in a nuclear facility, for example, and particularly to a working device that can be easily attached to piping of different diameters. Regarding work equipment that can be used.

(Prior art) Conventionally, when inspecting piping in nuclear power facilities such as nuclear power plants, a method has been adopted in which workers scan a detector such as an ultrasonic probe around the inspection area. The department has also introduced automated equipment.

(Problem to be solved by the invention) By the way, when inspecting piping manually, the radiation exposure of workers increases and the work is not easy, so it is desirable to reduce the work dose and the burden on the workers. It is rare.

On the other hand, when using automatic equipment, there is no such problem, but with conventional automatic equipment, the equipment used differs depending on the pipe diameter, so the equipment must be replaced each time depending on the inspection location, which reduces work efficiency. However, there are other problems such as high costs.

The present invention has been made in consideration of these points, and can be used not only when the work surface is flat, but also when the work surface is curved, such as piping, without any problem. To provide a working device that can sufficiently cope with changes in the curvature of a working surface.

[Structure of the invention]

(Means for Solving the Problems) As a means for achieving the above object, the present invention provides a truck having wheels that runs on a work surface, a work device installed on the truck to perform work on the work surface, and a work device for performing work on the work surface. a moving mechanism for moving the equipment in a direction perpendicular to the running direction of the trolley; a running guide string removably stretched over the work surface; and an intermediate portion of the running guide string provided on the trolley. and drive wheels that press the trolley against the work surface by wrapping around the outer surface thereof, and by rotating the drive wheels in forward and reverse directions, the trolley can be made to travel along the traveling guide string. It is characterized by

(Function) In the working device according to the present invention, the middle part of the running guide string stretched over the work surface is wound around the outer surface side of the drive wheel attached to the truck. The trolley is pressed against the work surface by the tension of .

Therefore, even if the work surface is vertical, the cart will not fall off the work surface, and even if the work surface is a curved surface such as the outer surface of piping, the cart can be moved in the forward and reverse directions of the drive wheels. It is possible to run it along the work surface. Furthermore, the trolley is attached to the work surface via a travel guide string, and the travel guide string can accommodate changes in the pipe diameter by simply changing its length, so even if the curvature of the work surface changes, the I can handle it.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 7.

1 to 3 show a working device for inspecting a welded part of a pipe as an example of a working device according to the present invention, and this working device has wheels 2 that run on the outer surface of a pipe 1. It is equipped with a truck 3, and a detector 4 such as an ultrasonic probe is attached to the truck 3 via a moving mechanism 5.

As shown in FIG. 2, this moving mechanism 5 includes a screw 6 extending in the width direction of the cart 3, and a nut 7 screwed onto the screw.
, a motor 8 that rotationally drives a screw 6, and a linear guide 9 installed in parallel with the screw 6. The detector 4 is driven and moved by this moving mechanism 5 in a direction perpendicular to the running direction of the trolley 3. It is supposed to be done.

At both ends in the width direction of the truck 3, a drive wheel 11 that is driven to rotate in forward and reverse directions by a motor 10 and a driven wheel 12 that freely rotates are provided. is wrapped around the outside.

As shown in FIGS. 4 to 6, each of these steel belts 13 has a U-shape formed by a belt 13a, a screw member 13b attached to one end of the belt 13a, and a bell 13a. It is composed of a plurality of locking metal fittings 13c. As shown in FIGS. 1 to 3, each steel belt 13 is wound around the pipe 1 by passing the belt 13a through the outer surface of the driving wheel 11 and the driven wheel 12, and then winding it around the pipe 1.
As shown in the drawings and FIG. 6, the screw member 13b is attached to the piping 1 by locking and tightening the locking fitting 13c. As a result, the trolley 3 is attached to the pipe 1 so as to be able to run along the outer surface of the pipe 1, as shown in FIG.

Next, the operation of this embodiment will be explained.

In use, first place the trolley 3 near the weld line of the pipe 1, and place the two steel belts 13 on the outer surfaces of the driving wheel 11 and the driven wheel 12, as shown in FIGS. 1 to 3. The wire is wound around the pipe 1 through the wire, and the tie member 13b is locked to the locking fitting 13c and tightened. As a result, each steel belt 13 is fixed to the pipe 1, and the cart 3 is attached to the pipe 1 with the steel belt 13 pressed against the outer surface of the pipe 1.

In this state, when the motor 10 is started and the drive wheel 11 is driven to rotate, the steel belt 13 is fixed to the pipe 1, so the trolley 3 moves along the steel belt 13 to the pipe 1, as shown in FIG. It will run circumferentially on the outer surface.

By the way, the detector 4 mounted on the trolley 3 is moved by a moving mechanism 5.
Since it is possible to move in the direction perpendicular to the traveling direction of the truck 3, that is, in the axial direction of the pipe 1, by combining the moving mechanism 5 and the traveling of the truck 3, the seventh
As shown in the figure, the detector 4 can be scanned in a zigzag path in the vicinity of the weld line 14.

Note that when the trolley 3 is run in the state shown in FIG. 3, running stability may not be obtained when the trolley 3 runs at the position of the screw member 13b, so the steel belt shown in FIG. In the fixed state of 13, the range in which the trolley 3 can travel is approximately 180 degrees in the upper half of the pipe 1.

Therefore, when the inspection of the upper part of the pipe 1 is completed in the state shown in FIG.
shift the position of. After that, the lower half of the pipe 1 is inspected. Thereby, the entire circumference of the pipe 1 can be inspected.

In this way, there is no need to use a fixed track like in the past, so the weight of the entire device can be reduced, and by adjusting the length of the steel belt 13, it can be applied to any circumference and pipe diameter, so the range of application is wide. can be expanded significantly.

In addition, since it is easy to install, it can reduce work time and can be expected to automate parts that could not be automated in the past.

FIG. 8 shows a second embodiment of the present invention, in which a steel belt 13 is stretched over a flat inspection surface 15, and a detector 4 mounted on a trolley 3 detects the welded portion of the inspection surface 15 ( (not shown).

In other respects, the structure is the same as that of the first embodiment, and the operation is also the same.

Therefore, even in the case of a flat inspection surface 15, the same effects as in the first embodiment can be expected, and the present invention can be similarly applied to inspection of a portion of a large diameter.

In both of the above embodiments, the case where the steel heald 13 is used has been described, or the same effect can be obtained even if other cords such as wire lobes are used.

Further, in both of the above embodiments, the case where the detector 4 for inspecting welded parts is mounted on the trolley 3 has been described, but it can also be applied to inspections other than welded parts, and the detector 4
For example, if a welding torch is installed instead, it can also be used for welding work.

〔Effect of the invention〕

As explained above, in the present invention, the trolley is attached to the work surface via the travel guide string, and the trolley is made to travel along the travel guide string by rotating the drive wheels in forward and reverse directions. Not only can the work surface be flat, but even if the work surface is curved, such as the outer surface of a pipe, it can be installed without any problem, and it can also be adequately adapted to changes in the curvature of the work surface.

[Brief explanation of the drawing]

FIG. 1 is an enlarged view of main parts showing a working device according to a first embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an overall configuration diagram showing the first embodiment of the present invention. Fig. 4 is a detailed view of the steel belt, Fig. 5 is an explanatory view showing the locked state of the steel belt screw member and the locking fitting, Fig. 6 is a plan view of Fig. 5,
FIG. 7 is an explanatory diagram showing an example of scanning by a detector mounted on a truck, and FIG. 8 is an explanatory diagram showing a second embodiment of the present invention. 1... Piping, 2... Wheels, 3... Trolley, 4...
Detector, 5... Moving mechanism, 10... Motor, 11.
... Drive wheel, 12... Driven wheel, 13... Steel belt, 14... Welding line, 15... Inspection surface.

Claims (1)

[Claims] A truck having wheels that runs on a work surface, a work device installed on the truck to perform work on the work surface, a moving mechanism that moves the work device in a direction perpendicular to the running direction of the truck, and the work surface. A driving wheel is provided on the trolley and presses the trolley against the work surface by winding an intermediate portion of the running guide string around the outer surface of the trolley. A working device, characterized in that the truck is caused to travel along a travel guide string by forward and reverse rotation of the drive wheels.