JPS60119460A - Device for inspecting welded part of pipeline - Google Patents

Abstract

PURPOSE:To prevent a coolant in a pipeline from leaking out through a guide pipe even when the pipeline is broken, by forming the entrance of a carriage for inspection at the upper part of the guide pipe for introducing the inspection carriage installed to the welded part of the pipeline. CONSTITUTION:A guide pipe 12 is installed to the outer periphery of the welded part of a pipeline 4 and an inspection carriage introducing section 61 is fitted to the upper part of the guide pipe 12. Moreover, a guide duct 61A is formed at the front end of the introducing section 61. Inspection of the welded part is performed in such a way that an insertion guide 51A is inserted into the guide duct 61A by operating a manipulator section 11 and an inspection carriage 52 is moved into the introducing section 61 by moving the carriage 52 on rails 53 and 54 and stopped on the movable section 66 of a sliding device 62. Then a driving section 67 is driven and movable sections 64-66 are slid toward the inside of the guide pipe 12 until the carriage 52 reaches the position Z1. Thereafter, the movable section of the sliding device 62 is returned to the original position after the carriage 52 is moved to the position Z2. The carriage is run along the outer periphery of the pipeline 4 from the position Z2 and inspection on the welded part is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe weld inspection device for inspecting pipe welds in nuclear power plants and the like.

BACKGROUND ART In a nuclear power plant, for example, weld line flaw detection of cooling system piping is extremely important in order to prevent serious accidents such as coolant leakage or radioactivity leakage. An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a perspective view showing a part of cooling system piping in a nuclear power plant. Reference numeral 1 in the figure indicates the piping equipment room,
Inside this piping equipment room 1 is a circulation pump 2 and a heat exchanger 3.
is installed. Further, reference numeral 4 in the figure indicates cooling system piping, and this cooling system piping 4 is covered with a moisturizing material 5. A coolant (for example, water or liquid sodium) flows from the furnace vessel (not shown) into the piping equipment room 1 as indicated by arrow 6 in the figure, and passes through the heat exchanger 3 and circulation pump 2 as indicated by arrow 7 in the figure. The structure is such that it returns to the furnace vessel side again.

The cooling system piping 4 has a large number of welding points, and these welding points are subjected to flaw detection inspection. The inspection device that performs this flaw detection inspection will be explained below.

That is, a guide rail 8 is installed in the piping equipment room 1, and inspection equipment @9- is installed along this guide rail 8.
moves and inspects the welded area. This inspection equipment @ history is the second
As shown in the drawings and FIG. 3, it is comprised of a truck 10 that moves along the lower surface of the guide rail 8, and a manipulator section 11 attached below the truck 10. The manipulator section 11 is attached to the arm △1-AIO and the arm 80, and is provided with a guide tube 1 attached to the outer periphery of the welded part.
2 includes an inspection trolley storage section 14 for guiding the inspection trolley 13, and the like. The inspection trolley 13 is composed of a parent trolley 15 and a child trolley 17 which is placed on the parent trolley 15 so as to be movable up and down and has a flaw detection device 16 mounted thereon.

On the other hand, an inspection carriage introducing section 18 is attached to the lower part of the guide tube 12, as shown in FIG.

A heat insulating material lid 19 is removably attached to this inspection trolley introducing section 18 .

According to the above configuration, first, the cart 10 is moved along the guide rail 8 to the vicinity of a predetermined welding portion.

After moving the manipulator 1 to the vicinity of the predetermined welding part,
1 to remove the heat insulating material cover 19 using the arm AIO. Thereafter, the manipulator 11 is operated to bring the inspection trolley housing section 14 closer to the introduction section 18. And inspection trolley 1
3 into the introduction section 18. Thereafter, the subcarriage 15 is raised and run around the pipe 4 along the guide pipe 12 to perform a flaw detection inspection.

According to the above configuration, the inspection trolley introduction section 18 is connected to the guide tube 1.
2, in the event that the piping 4 is damaged, there is a risk that the coolant will flow out and leak to the outside via the introduction part 18, and there is a fear of secondary disasters caused by this.

The present invention has been made based on the above points, and its purpose is to prevent the leakage of coolant from the introduction part even if piping, etc. is damaged and coolant leaks out, thereby preventing secondary disasters. An object of the present invention is to provide a piping welded part inspection device that can prevent such occurrences.

That is, a guide rail installed in the piping equipment room, a trolley that runs along the guide rail, a manipulator attached to the trolley, an inspection trolley storage section attached to the tip of the manipulator, The inspection trolley stored in the inspection trolley storage section, the guide pipe arranged at a distance from the outer periphery of the welded part of the pipe arranged in the piping equipment room, and the upper part of the guide pipe arranged upwardly. an introduction section that is attached to the inspection trolley and introduces the inspection trolley from the inspection trolley storage section;
A slide device is telescopically attached to the entrance of the introduction section and guides the introduced inspection trolley into the guide tube, and an inspection trolley is selectively located on the inspection trolley traveling line between the guide tube and the introduction section. The structure includes a slide truck that allows the vehicle to run all around the vehicle.

An embodiment of the present invention will be described below with reference to FIGS. 4 to 8. It should be noted that the same parts as in the prior art will be described with the same reference numerals. At the tip of the arm 86 of the inspection device 9 in FIG.
An inspection trolley storage section 51 is attached, and an insertion guide section 51A is attached to the tip of this inspection trolley storage section 51.

5- An inspection trolley 52 is housed in this inspection trolley storage section 51. That is, rails 53 and 54 are laid in the inspection trolley storage section 51, and the inspection trolley 5
2 can run along these rails 53, 54 via wheels 55.

The inspection trolley 52 and the manipulator section 11 are electrically connected by a cable 56, and the cable 56 is wound around a cable reel 57.

At the center of the lower end of the inspection trolley 52 is an ultrasonic deep wound device W1.
58 is attached, and a silent inspection device 59 and an illumination device 60 are attached to the tip. As the silent inspection device 59, for example, an ITV camera or a fiberscope is used. In addition, the symbol R1 in the figure
1 to R18 indicate the movable directions of the arms A1 to A10, G11 indicates the moving direction of the grip operation, and R
Reference numeral 19 indicates the winding and unwinding directions of the cable reel 57.

Next, the configuration on the guide tube 12 side will be explained. Guide tube 12
An inspection carriage introduction part 61 is attached to the upper part of the inspection carriage introduction part 61, and a guide duct 61A is formed at the tip of this inspection carriage introduction part 61. In this way, the inspection table heavy-duty introduction part 61 is installed at the upper part of the guide pipe 12 (this is so that even if the pipe 4 is damaged and the coolant leaks out, it will not leak to the outside through the introduction part 61). A slide device 62 is attached to the entrance of the guide duct 61A.This slide device 62 has a fixed part 63 fixed to the entrance and a movable part 64 that slides into the guide tube 12. .6
5, and 66, and these movable parts 6
4.65.66 is configured to be driven by a drive section 67 provided at the entrance. That is, the test cart 52 is introduced into the test cart introducing section 61 . Then, the inspection trolley 52 is fixed on the movable part 66, and the movable parts 64, 65, 66 are moved by the driving part 67 and inserted into the guide tube 12. Furthermore, a slide carriage 68 is provided within the inspection carriage introduction section 61. This slide truck group [is a rail 70 formed with the same radius of curvature as the inner peripheral surface of the heat insulating material 69 of the guide pipe 12, and this rail 70.
A drive wheel 72 is attached to the support member 71, and a guide wheel 74 is also attached to the support member 71 and guided by a guide plate 73. The sliding cart 1 of this naricho can be selectively positioned at the traveling position of the inspection cart 62 as shown in FIG. 8 via the drive wheels 72 and guide wheels 74, As shown, the configuration allows the inspection trolley 62 to travel around the entire circumference of the pipe 4. Reference number 75 in FIG. 6 is a spring attached to the inspection trolley 52, and the spring 75 is configured to press the wheels 55 of the inspection trolley 520 toward the heat insulating material 69 of the guide tube 12. In addition to springs, rubber or air cushions may also be used. In this way, the spring 75 causes the wheel 55 to
The reason for pressing is to absorb the fact that the distance between the heat insulating material 69 and the pipe 4 may not be constant over the entire circumference.

Therefore, when the heat insulating material 69 and the pipe 4 are assembled so that the distance between them is constant over the entire circumference, the spring 75 may be omitted. Further, reference numeral 76 indicates a heat insulating material lid that closes the openings 61B of the guide ducts 1 to 61A.

The operation will be explained based on the above configuration. First, the cart 10 is run on the guide rail 8 and approaches the vicinity of the desired welding part. Next, the manipulator 11 is operated to bring the inspection trolley storage section 51 closer to the inspection trolley introducing section 61. Then, the arm A9 and AIO of the manibilizer section 11 are operated to remove the heat insulating material lid 76. After removing the heat insulating material lid 76, operate the manipulator section 11 to insert the insertion guide section 51Δ.
into the guide dows 1 to 61A. Then, the inspection trolley 52 is run on the rails 53 and 54, moved into the introduction section 6, and stopped on the movable section 66 of the slide device group 2. Then, the movable part 64 is driven by the driving part 67.
．． 65 and 66 inward in the guide tube 12 to the state shown by the broken line in FIG. 6 (71st position 1 in the diagram)
. Thereafter, the inspection cart 52 is moved from the 71st position to the 72nd position 9-. After moving the inspection trolley 52 to position 72, the movable parts 64, 65, and 66 of the slide device 62 are returned to their original positions (indicated by solid lines in FIG. 6). Inspection of the welded portion of the pipe 4 is started from this z2 position. The inspection cart 52 then travels around the outer circumference of the pipe 4 along the guide pipe 12. On the other hand, when the inspection cart 52 passes the position 72, the slide cart 11 drives the driving wheels 72 to move to the position shown by the solid line in FIG. 8, and as shown in FIG. This allows the inspection trolley 52 to run near the connection part with the test trolley 61. As a result, the inspection trolley 52 can travel around the entire circumference of the pipe 4 and can inspect the welded portion. After the inspection of the welded parts around the entire circumference of the pipe 4 is completed, the drive wheel 72 of the slide truck IL
is driven to return the rail 70 to its original position (the position indicated by the broken line in FIG. 8), and the drive section 67 of the slide device 62 is
to move the movable parts 64, 65, and 66 to the guide tube 1.
Slide it inside 2. Then, the inspection trolley 52 is returned from the inside of the guide tube 12 into the inspection trolley storage section 51 via the introduction 161. From now on, manipulator part 1
1 and the trolley 10 moves to the next inspection position.

As described above, according to the pipe weld inspection device according to the present embodiment, the entrance of the inspection trolley 52 to the guide pipe 12, that is, the inspection trolley introduction part 61, is connected to the guide pipe 12 without losing the weld inspection function over the entire circumference of the pipe 4. (above the welded part of the pipe 4), so that even if the pipe 4 were to break and the coolant leaked out, the introduction part 61 could be formed at the top of the guide pipe 12. , that is, above the welded part of the pipe 4, it is possible to prevent the coolant from leaking to the outside via the introduction part 61, and also to prevent secondary disasters due to coolant leakage. It is possible to greatly improve safety by making it possible to prevent accidents from occurring.

As described in detail above, the pipe weld inspection device according to the present invention includes a guide rail installed in the piping equipment room, a trolley that runs along the guide rail, a manipulator attached to the trolley, and a A space is provided between an inspection trolley storage section provided at the tip of the manipulator, an inspection trolley stored in the inspection trolley storage section, and the outer periphery of the welded portion of the pipe arranged in the piping equipment room. a guide tube attached to the guide tube; an introduction section attached upward to the upper part of the guide tube for introducing the inspection trolley from the inspection trolley storage section;
A slide device that is telescopically attached to the entrance of the introduction section and guides the introduced inspection cart into the guide tube, and a slide device that is selectively located on the inspection cart running line at the connection between the guide tube and the introduction section and used for inspection. This structure includes a slide truck that allows the truck to run all around the circumference.

Therefore, the introduction part can be positioned above the guide pipe, that is, above the welded part of the pipe, without losing the ability of the inspection trolley to inspect the welded part around the entire circumference of the pipe. Even if coolant leaks out, the coolant will not leak to the outside through the introduction part, making it possible to prevent secondary disasters caused by coolant leakage to the outside, making it safer. performance can be significantly improved.

[Brief explanation of drawings]

Figures 1 to 3 show conventional examples, where Figure 1 is a partial perspective view of a nuclear power plant, Figure 2 is a perspective view of an inspection device, Figure 3 is a perspective view of the vicinity of a guide tube, and Figure 3 is a perspective view of a portion of a nuclear power plant. 4 to 8 are views showing one embodiment of the present invention, in which FIG. 4 is a perspective view of the inspection device, FIG. 5 is a perspective view of the vicinity of the guide tube, and FIG. 6 is a diagram showing an inspection cart placed inside the guide tube. FIG. 7 is a diagram showing the state in which the inspection trolley is running, and FIG. 8 is a sectional view taken along the line ■-■ in FIG. 7. DESCRIPTION OF SYMBOLS 1... Piping equipment room, 4... Piping, 8... Guide rail, 10... Trolley, 11... Manipulator, 5
1... Inspection trolley storage section, 52... Inspection trolley, 1
2... Guide pipe, 61... Inspection trolley introduction part, 1L.
...Slide device, 68 ...Slide trolley. Applicant Sub-Agent Patent Attorney Takehiko Suzue 13- Figure 3 JP-A-Sho GO-1194GO (6) Figure 5 Figure 7 Figure 8

Claims (1)

[Claims] A guide rail installed in the piping equipment room, a trolley that runs along the guide rail, a manipulator attached to the trolley, an inspection trolley storage section attached to the tip of the manipulator, and a trolley that runs along the guide rail. An inspection trolley stored in the inspection trolley storage section, a guide pipe attached at a distance to the outer periphery of the welded part of the pipe arranged in the piping equipment room, and an upwardly extending guide pipe attached to the upper part of the guide pipe. an introduction section for introducing the inspection trolley attached thereto from the inspection trolley storage section; a slide device telescopically attached to the entrance of the introduction section for guiding the introduced inspection trolley into the guide tube; A piping welded part inspection device characterized by comprising a slide carriage that is selectively located on the inspection carriage running line at the connection part with the introduction part and allows the inspection carriage to run all around the circumference.