JPH0366105B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting and repairing defects in a convex body, such as a spherical gas holder for storing city gas.

Conventionally, in order to inspect and repair the soundness of a convex body, scaffolding has been erected at a high place around the entire circumference of the convex body, and non-destructive flaw detection tests have been performed manually. Therefore, a great deal of effort is required to assemble the scaffold, and such a scaffold must be assembled for each convex body, which requires a great deal of effort and time. Further, in order to form a scaffold over the entire circumferential surface of such a convex body, a large number of members are required, and it takes time to transport and assemble them.

An object of the present invention is to provide a device that allows surface defects to be detected and repaired easily, safely and efficiently with a small number of people and a small amount of time.

The present invention has (a) a flexible cable 113 that extends vertically along the surface of the convex body 1, and (b) a motor 123 for vertical movement, and the motor 123 for vertical movement moves the cable 113. (c) a truck 121 that is mounted on the truck 121 and can be angularly displaced on the surface of the convex body 1 along an extension of one radius line of the convex body 1; a holder 135; (d) a holder drive motor 134 for driving angular displacement of the holder 135 around the rotational axis; and (e) a holder drive motor 134 that is removably attached to the holder 135 to repair defects on the surface of the convex body 1. Multiple working means 141, 170, 200, 21 for
0,240,241, (f) a first scaffolding body 6a at the top, one or more second scaffolding bodies 6e arranged below the first scaffolding body 6a at the top, and a second scaffolding body Third scaffolding bodies 6b, 6c, 6d arranged below 6e, the first to third scaffolding bodies 6a, 6e, 6b, 6
c, 6d are shaft bones 11, 12 extending vertically;
Connecting members 13a, 14a; 13, 14 connecting these shaft bones 11, 12 form parallelogram links in the vertical plane, and connect the shaft bones 11, 12 of each scaffold 6a to 6e vertically. The first and second scaffold bodies 6a, 6 are connected with pins, respectively.
It is constructed by fixing the shaft bone 12 on the side of the convex body 1 of e to the cable 113, and telescopic drive means 75, 76, 77 are provided on the diagonal lines of the parallelogram links of the third scaffolds 6b, 6c, 6d. Such first to third scaffolding bodies 6a, 6e, 6b, 6c, 6d
and (g) the connecting body 7, (g1) a first connecting member 62 whose lower end is pin-coupled by a pin 312 to the shaft bone 12 of the uppermost scaffolding body 6a near the convex body 1; , (g2) has a lower end portion pin-coupled by a pin 311 to another shaft bone 11 disposed away from the convex body 1 of the first scaffold body 6a at the top, and a connecting member 62 and a second connecting member 61 which has an upper end portion pin-coupled by a pin 64 and is configured to be expandable and contractible.
(h) holding means 9; (h1) a rail formed in an annular shape around a vertical axis 280 passing through the center 8 of the convex body 1 and fixed to the top of the convex body 1; 68; (h2) a movable body 66 that extends in the circumferential direction of the rail 68 along the rail 68 and to which the upper end of the first connecting member 62 is pin-coupled; (h3) the first connecting member 62 and the movable body 66; A pair of rollers 67 are respectively pivotally supported by a movable body 66 near a position where the rollers are pin-coupled, and are supported and run along a radially inner guide surface 68a of a rail 68. means 9; (i) pivoted on the shaft bone 12 of the scaffolding body 6 near the convex body 1; This is a surface defect detection and repair device characterized by including a driving roller 71 that rolls, and (j) a driving roller motor 73 that rotationally drives the driving roller 71.

FIG. 1 is a side view of one embodiment of the present invention.
A convex body 1 such as a gas holder, which is a so-called spherical tank for storing city gas or the like, is supported by a support 3 on the ground surface 2. The convex body 1 has a hollow spherical shape, and a scaffolding device 4 is provided to maintain the outer peripheral surface of the upper hemisphere portion which is the convex body convex upward, and the outer peripheral surface of the lower hemisphere portion which is the convex body convex downward. Scaffolding equipment 5 is provided for maintenance.

The scaffolding device 4 includes a plurality of scaffolding bodies 6 that form parallelogram links in a vertical plane along the outer peripheral surface of the convex body 1 and have scaffolding, and a scaffolding body 6a at the top of the scaffolding bodies 6. A connecting body 7 to be connected, a holding means 9 that connects the connecting body 7 to the top of the convex body 1 and suspends it by supporting it rotatably around a vertical axis 280 passing through the center 8 of the convex body 1; 1 and a driving means 10 for driving the scaffolding body 6 together with the connecting body 7 in the circumferential direction of the scaffolding body 1 . Note that the plurality of scaffolding bodies 6 is used as a general term for scaffolding bodies 6a to 6e, which will be described later.

FIG. 2 is a frame diagram of the scaffolding body 6, and FIG. 3 is a front view of the scaffolding body 6 viewed from the convex body 1 side.
FIG. 4 is a plan view of the scaffolding body 6. The scaffolding body 6 is
As clearly shown in FIG. 5, a pair of shaft bones 11, 12 forming a parallelogram link and a pair of connecting members 13, 14 are aligned with a horizontal axis perpendicular to a vertical plane including the parallelogram link. pin 15 with
.about.18, and these parallelogram links are provided in two sets as indicated by reference numerals 19 and 20. Working floors 21, 22 are pin-coupled between the parallelogram links 19, 20 by pins 23-30. These pins 23-30 also have axes parallel to pins 15-18. Handrails 31 and 32 are provided perpendicularly to the working floors 21 and 22 at the ends opposite to the convex body 1. The work floors 21 and 22 are made of a convex body 1
A ladder 35 extends partially between the parallelogram links 19 and 20 in the circumferential direction, and is connected to the ladder 35 passing through the passages 33 and 34 and extending vertically.

Free ends of the support member 36, which is bent into a U shape surrounding the scaffolding body 6, are fixed to the parallelogram links 19 and 20. This support member 36 is covered with a sheet body 37 such as a canvas. Note that in FIGS. 2 and 3, the support member 36 and the sheet body 37 are
is omitted.

At the bottom of the shaft bone 12 of the parallelogram link 19,
A roller 38 having a rotation axis extending vertically is pivotally supported, and a roller 39 is similarly pivotally supported on the other parallelogram link 20. Rollers 38, 39
contacts the outer circumferential surface of the convex body 1 and enables the scaffolding body 6 to move smoothly in the circumferential direction of the convex body 1. The sheet body 37 can be detached from the support member 36 to facilitate daytime work.
According to this sheet body 37, it is possible to prevent dust from scattering during sandblasting work.

Sprocket foils 111 and 112 are provided on the connecting body 7 and the scaffolding body 6b formed of parallelogram links provided near the corridor 74, and between the sprocket foils 111 and 112, Cable 11 that can be bent along the surface
3 is stretched vertically. Similarly, a cable 11 is installed between sprocket wheels 114 and 115 on which scaffolding bodies 6c and 6d are provided below the corridor 74.
6 is strung up. Similarly, a cable 119 is stretched between the sprocket wheels 117 and 118 on the scaffolding device 5 as well.

FIG. 7 shows the topmost scaffold 6a of the scaffolds 6.
FIG. This scaffolding body 6a also has a similar configuration to the scaffolding body 6, and corresponding parts are given the same reference numerals. The shaft bones 11 and 12 are the connecting member 1
3a and 14a to form a parallelogram link, and work platforms 53, 54, 55 and handrails 56, 57, 58 are attached.

FIG. 8 is a plan view of the connecting body 7 and the holding means 9, FIG. 9 is a sectional view taken along the section line - in FIG. 8, and FIG. 10 is a plan view of the connecting body 7 and the holding means 9. −XI
FIG.

The connecting body 7 includes a first connecting member 62 whose lower end is pin-coupled to the shaft bone 12 near the convex body 1 of the uppermost scaffolding body 6a by a pin 312, and a first connecting member 62 whose lower end is pin-coupled to the shaft bone 12 of the uppermost scaffolding body 6a, and a convex body of the uppermost scaffolding body 6a. Another one placed away from one
It has a lower end portion that is pin-coupled to the two shaft bones 11 by a pin 311, and an upper end portion that is pin-coupled to the connecting member 62 by a pin 64. The second connecting member 61 is configured to be adjustable.

The holding means 9 is formed in an annular shape centered on a vertical axis 280 passing through the center 8 of the convex body 1 .
a rail 68 fixed to the top of the rail 68; a movable body 66 that extends along the rail 68 in the circumferential direction of the rail 68 and to which the upper end of the first connecting member 62 is pin-coupled; and the first connecting member 62 and the movable body 66. The rails 6 are each pivotally supported by a movable body 66 in the vicinity of the position where they are connected by a pin 65, and have upper and lower rotation axes.
A pair of rollers 67 are supported and run along a radially inner guide surface 68a of 8. The holding means 9 holds the scaffolding body 6 to the convex body 1 via the connecting body 7.
hang along the outer circumferential surface of the Therefore, since the weight of the scaffolding body 6 is received by the rail 68 via the movable body 66, it is necessary to improve the strength with which the rail 68 is attached to the convex body 1. For this purpose, the rail 68 is attached via a mounting base 281, and the side part of the rail 68 is fixed to a support shaft member 70 via a holding member 69, and this support shaft member 70 is connected to a vertical axis passing through the center 8 of the convex body 1. 280 and fixed to the convex body 1.

FIG. 11 is a side view of the drive means 10. A drive roller 71 that contacts the outer peripheral surface of the convex body 1 is pivotally supported on one shaft bone 12 of the scaffold body 6 . The drive roller 71 is connected to a motor 73 via a shaft coupling 72.
driven by. The motor 73 is attached to the shaft bone 12. A drive roller 71 is driven by a motor 73, by which the scaffolding body 6 can be moved around a vertical axis 280 passing through the center 8 of the convex body 1. Therefore, maintenance can be performed along the entire circumference of the upper hemisphere of the convex body 1. That is, the drive roller 71 is
It is pivotally supported on the shaft bone 12 of the scaffold body 6 near the convex body 1,
The vertical axis 280 is in contact with the outer peripheral surface of the convex body 1.
It rolls around the outer peripheral surface of the convex body 1.

A corridor 74 is attached to the equator of the convex body 1. The uppermost scaffolding body 6a among the plurality of scaffolding bodies 6
Scaffolding bodies 6b near the corridor 74, excluding the scaffolding body 6e disposed below the topmost scaffolding body 6a,
6c and 6d, turnbuckles 75, hydraulic cylinders 76, and turnbuckles 77 are respectively provided as telescopic driving means on the diagonal lines of the parallelogram links so that the corridors 74 and the columns 3 can be avoided. This allows the shape of the parallelogram link to be adjusted, for example as indicated by reference numeral 78. Therefore, a corridor 74 having various dimensions and shapes and protruding radially outward from the convex body 1
And it becomes possible to move the scaffolding body 6 in the circumferential direction of the convex body 1 while avoiding the pillars 3. Therefore, the work can be performed at a desired position in the circumferential direction of the convex body 1.

FIG. 12 is a plan view of the vicinity of the cable 113, FIG. 13 is a longitudinal sectional view thereof, and FIG. 14 is a perspective view thereof. A rack 120 is provided on the cable 113. Although the rack 120 is partially omitted in FIG. 14, it is provided along the cable 113 over the entire length of each member of the cable 113. The cart 121 is provided with a pinion 122 that meshes with the rack 120, and this pinion 122 is connected to the pulse motor 12.
3. As a result, the trolley 121
is movable in the meridian direction of the convex body 1 along the cables 113. The rope 113 is provided with a tape 124 with an indication for detecting the position along the meridian direction of the truck 121, and the detector 125 detects the indication on the tape 124 to detect the position of the truck 121 in the meridian direction. can be detected. This tape 124
Similar to the rack 120 described above, the rack 120 is omitted in FIG. 14, but is provided along the entire length of the cable 113. The cables 113 are fixed to the scaffold 6 by support pieces 126. This support piece 126
The position of the cable 113 on the outer surface of the convex body 1 can be set by selectively inserting and fixing the mounting pins 128 into adjustment holes 127 formed at a plurality of intervals. The racks 120 are formed on each surface of the cable 113 on the convex body 1 side (that is, on the inside) and on the surface that is away from the convex body 1 (that is, on the outside), and the attachment point of the rack 120 on the cable 113 is on the convex surface It is shifted in the circumferential direction of the body 1. As a result, the pulse motor 123
This prevents the truck 121 from being displaced around the cable 113 when the pinion 122 is driven.

The truck 121 has a pair of hydraulic cylinders 129,1
30 are provided, and these cylinders 12
9 and 130 allow the rollers 131 and 132 to come into contact with and separate from the outer peripheral surface of the convex body 1. One roller 131 has a rotation axis parallel to the latitude direction of the convex body 1, and the other roller 132
has an axis of rotation parallel to the meridian direction. Trolley 12
A mounting base 133 is fixed to 1. A holder 135 is attached to this mount 133 so that it can be angularly displaced by a motor 134. Holder 135
includes a pair of plates 136, 137 and a spring 138 interposed between them, and the plate 136 is fixed to an output shaft 139 of a motor 134. On the plate 137 on the convex body 1 side, spherical rollers 140 are arranged at each vertex position of a virtual square. Thereby, the holder 135 can be angularly displaced over a movable range W of 90° with the extension line of one radius of the convex surface body 1 as the axis of rotation.

As clearly shown in FIG. 14, the holder 135 is capable of attaching and detaching a shot blasting working means 141 and the like to perform various operations. Cart 1 with the working means attached from the holder 135
21 along the cable 113, the cylinder 129 is extended and the roller 131 is moved along the convex body 1.
At this time, the roller 140 is separated from the outer peripheral surface of the convex body 1 . In this way, the carriage 121 can move in the meridian direction of the convex body 1. Further, when the cable 113 moves in the meridian direction of the convex body 1, the cylinder 129 is contracted,
The cylinder 130 is extended, and at this time the roller 13
2 is in contact with the outer peripheral surface of the convex body 1, and the roller 1
40 is separated from the convex body 1. In this way, the cart 121 can move smoothly in the latitude direction. When carrying out the above-mentioned shot blasting work using the working means, the cylinders 129, 1
30 are both reduced in size, the rollers 131 and 132 are separated from the convex body 1, and the roller 140 attached to the holder 135 is in contact with the outer peripheral surface of the convex body 1 to support the working device.

The position of the cart 121 in the latitude direction can be detected by a tape 142 attached to the rail 68 and a detector 143 attached to the moving body 166. In this way, the amount of vertical movement l of the trolley 121
The computer 144 can calculate and record the positions X and Y of the cart 121 on the convex body 1 based on the rotation angle θ in the circumferential direction.

When diagnosing the health of a convex body such as a gas holder, the scaffolding devices 4 and 5 are assembled as shown in FIG.
3 and the cart 121 are set, and the shot blasting means 141 is attached to the holder 135 to polish the diagnostic area.

A cross section of the shot blasting means 141 is shown in FIG. Grid and air are injected from a conduit 145 onto the outer circumferential surface of the convex body 1 covered with the cover 144, thereby polishing the outer circumferential surface of the convex body 1 and removing paint chips. Grid and paint chips are vacuumed away from line 146 along with air. Cover 144 prevents dust from scattering outward. At this time, the sheet body 35 may be omitted since there is no need for dustproofing.

After this shot blasting process is completed, a magnetic particle flaw detection test is conducted to detect flaws on the surface of the convex body 1, and subsequently an ultrasonic flaw detection test is conducted to detect flaws inside the convex body 1. Thereafter, defects are confirmed with a grinder, and the defective parts are repaired by welding or grinding with a grinder. After the repair, the repair is inspected, and if the repair is complete, it is painted. In this way, the health diagnosis work is completed.

Figure 18 shows the working means 24 for magnetic particle testing.
1 is a perspective view of FIG. Mounting piece 1 is attached to the holder 135.
A coil 148 is arranged in a square ring shape via 47. A test liquid for magnetic particle flaw detection is transferred to the surface of the convex body 1 surrounded by the coil 148 from a conduit 150 to a nozzle 149 . A cover 151 made of a light-shielding material is removably placed over the coil 148, and a black light 152 for irradiating ultraviolet rays is provided inside the cover 151. A fiberscope 153 detects the surface of the convex body 1 irradiated with ultraviolet rays on the cover 151, and the signal from the fiberscope 153 is led to an industrial television camera 155 through an optical fiber 154, where it is converted into an electrical signal. converted.

FIG. 20 shows the inspection process of the magnetic particle flaw detection test. The surface portion of the convex body 1 to be subjected to magnetic particle flaw detection is polished with a buff, and then the coil 148 is excited and magnetized. The direction of magnetization by this coil 148 is selectively determined along the outer surface of the convex body 1 in mutually orthogonal directions. Next, the test liquid is sprayed from the nozzle 149. This test liquid contains fluorescent magnetic particles. Next, a black light 152 is irradiated, and the fiberscope 1 is
53 to observe the pattern of the magnetic particles.

With reference to FIG. 19, fiberscope 153
Then, the image from the objective lens 157 is received by a photoreceptor 158 and captured by an industrial television camera 155 via an optical fiber 154. A signal from this camera 155 is input to an interface 160 of the image processing device 159. The interface 160 includes a video tape recorder device 161.
and a monitor television device 162 are connected. A microprocessor 163 that performs arithmetic processing is connected to the interface 160. The signal from the position detector 125 is connected to a position detection computer 164, and the position detected by this is given to the microprocessor 163 from the interface 165. Interface 165 is connected to printer 166 and keyboard 167.

In this way, the magnetic particle pattern is observed and image processed, and the defect shape and position are recorded and printed by the printer 166.

Next, the motor 134 is angularly displaced or the motor 123 is driven again to perform a magnetic particle flaw detection test on different surface portions of the convex body 1.

To perform the ultrasonic flaw detection test, a working means 170 shown in FIG. 21 is used. A working position 170 is fixed to the holder 135 by a mounting member 171. In this ultrasonic flaw detection work means 170,
At the bottom of the supports 172, 173, electromagnets 174,
175 is attached, and this electromagnet 174,
By energizing 175 the support 172,1
73 can be magnetically attracted to the outer surface of the convex body 1. A guide member 176 is fixed between the supports 172 and 173. This guide member 176
The moving body 177 can move along.
This moving body 177 has pulse motors 179 and 18.
0 allows the probes 181 and 182 to move. Thus, the direction of movement along the pulse motor 178 is the meridian direction of the convex body 1 along the cable 113, and the direction of movement along the pulse motors 179 and 180 is the latitude direction of the convex body 1.

FIG. 22 is a side view of the vicinity of the probe 182.
The probe 182 is mounted on a holder 184 with wheels 183
is mounted on the lever 185, and one end of the lever 185 is connected to pin 1.
86 to the holder 184. This lever 185 is connected to the movable member 18 by a pin 187.
Pin-coupled to 8. Lever 185 is spring 189
As a result, the probe 182 is urged in a direction closer to the outer peripheral surface of the convex body 1. The moving member 188 is movable along the moving body 177 by the pulse motor 180. In this embodiment, the welding peak 190 of the convex body 1 is in the meridian direction along the base body 176.

FIG. 23 shows an electrical configuration for ultrasonic flaw detection. Signals from probes 181 and 182 are input to microcomputer 191 through interface 190. Also motors 178, 179, 180
A signal for controlling the drive is provided via line 192. A signal from the microcomputer 191 is printed by a printer 192. A signal from a keyboard 193 is given to the microcomputer 191 . The output from the position detector 125 is given to a computer 194 to calculate the ultrasonic flaw detection position, and is given to the microcomputer 191.

24. Referring to FIG. 1, the movement paths of the probes 181 and 182 are shown. The probes 181, 182 are moved by motors 179, 180 as indicated by arrows 195, 196, whereby the weld bead 190 of the convex body 1, indicated by reference numerals 197, 198, is detected internally. It will be done. The movement paths of the probes 181 and 182 are carried out gradually as shown in FIG. 24.

Referring to FIG. 25, the outer peripheral surface of the convex body 1 is polished by a buff for ultrasonic flaw detection. Then, the working device 170 is positioned and ultrasonic flaw detection is performed through the couplant. Therefore, the shape and position of the detected defect are calculated and determined by the microcomputer 191, and printed and recorded by the printer 192. The shapes and positions of such detected defects are recorded sequentially as the motors 178, 179, and 180 move.

At the top of the convex body 1 are a compressor 250 for pumping the grit and air for shot blasting, and a cyclone 251 for separating the grit and paint chips after the shot blasting so that the grid can be reused. , a tank 252 storing a test liquid for performing magnetic particle flaw detection, and a tank 253 for supplying glycerin as a couplant for ultrasonic flaw detection. Such a configuration is the same in relation to the scaffolding device 5, and the same reference numerals are given.

FIG. 26 is a perspective view of a working means 200 for polishing the surface of the convex body 1 with a buff. Mounting tool 2
01 is fixed to the holder 135. The frame 202 is attracted and fixed to the surface of the convex body 1 by an electromagnet 203.

FIG. 27 is a sectional view of the working means 200. A spring 204 is attached to the frame 202 of this working means 200.
A support plate 205 is attached via. Support plate 2
05 has a plurality of (four in this embodiment) motors 20.
6 is fixed. A buff 207 is rotationally driven by this motor 206, and the surface of the convex body 1 is polished.

Fig. 28 shows grinding work means 2 using a grinder.
10 is a perspective view of FIG. Attachment member 211 is fixed to holder 135. Frame 2 of working means 210
An electromagnet 213 is attached to 12, and the frame 212 can be magnetically attracted and fixed to the outer surface of the convex body 1 by means of the stiffness. A moving body 214 is movable along a rail 215 in the frame 212 . The movable body 214 is formed into a frame shape, and is provided with a motor 217 that drives a buff 216 to polish the outer surface of the convex body 1 . The grinder is a disc-shaped whetstone 218, 219
and motors 220, 221, and the rotation axes of these grindstones 218, 219 are orthogonal to each other.

FIG. 29 is a simplified cross-sectional view showing the structure of the grinder near the grindstone 218. Motor 220 is pivotally supported by pin 222 to moving body 214 . The motor 220 has a pin 22 attached to one end of a lever 224 which is pivotally supported on the movable body 214 by a pin 213.
It is supported by 5. The other end of the lever 224 is connected to a piston rod of a hydraulic cylinder 227 by a pin 226. The detector 247 is the grindstone 218
The distance between the outer surface of the convex body 1 and the outer surface of the convex body 1 is detected. Whetstone 2
18 grinds the surface defect 228 detected by the magnetic particle flaw detection operation means 241.

FIG. 30 is a block diagram showing the electrical configuration related to the working means 210. Whetstone 218, 21
Motors 220 and 221 that drive 9 are controlled by a microcomputer 230. Detector 2
47 is a microcomputer 230 with a grindstone 21
8 gives a signal corresponding to the grinding depth. The microcomputer 230 has a line printer 23
2 and a keyboard 233 are connected. The microcomputer 230 is also given signals from the position detector 125 and the magnetic particle detection means 231.

Referring to FIG. 31, the surface defect detection results are analyzed by the magnetic particle detection means 241, and grindstones 218 and 219 are positioned at the position of the surface defect. Therefore, the thickness of the plate around the surface defect is calculated based on the ultrasonic flaw detection results, and the grinding depth is set. Therefore, using grindstones 218 and 219, surface defects 228 are removed.
to grind. When the grinding depth is large, weld overlay is performed. Thereafter, whether or not the surface defect has been repaired is diagnosed using the magnetic particle inspection means 241. In this way, it becomes possible to automatically diagnose the health of the convex body 1.

The radially outward side of the convex body 1 of the scaffolding device 5 that forms a scaffold in the lower hemisphere of the convex body 1 (left side in FIG. 1)
A rear view seen from above is shown in FIG. 32, a plan view thereof is shown in FIG. 33, and FIG. 34 is a perspective view thereof. An annular horizontal inner rail 81 is provided concentrically on the ground surface 2 around a vertical line passing through the center 8 of the convex body 1, and an annular horizontal outer rail 82 is provided concentrically. Rail 81,8
Wheels 84 and 85 of a trolley 83 are mounted on the carriage 2 and guided. The wheels 84 are supported by support arms 86 extending radially inward from the truck 83, and the wheels 85 are supported by support arms 86 fixed to the truck 83.
It is attached to 7. The rotation axes of the wheels 84, 85 intersect the vertical axis passing through the center 8 of the convex body 1 in a horizontal plane. The wheels 85 are driven by a motor 88, which allows the truck 83 to pivot around a vertical line 280 passing through the center 8 in a horizontal plane.

A support body 90 having a stair-like working floor 89 is erected on the trolley 83. This support body 90 is supported by a tension member 91 provided with a turnbuckle or the like on the support arm 87. Handrails and the like are appropriately provided on both sides of the work floor 89 to improve safety.

A sheet body 92 made of a light-shielding material such as rubber is suspended from both sides of the support body 90, and an endless annular flexible cylinder body 93 is disposed along the top of the sheet body 92. provided. This cylindrical body 93 is filled with compressed air or the like.

By extending the piston rods of the cylinders 96 and 97, the cylindrical body 93 can be brought into airtight contact with the outer circumferential surface of the convex body 1 over the entire circumference of the annular longitudinal direction. As a result, the sheet body 92,1
02,103, the convex body 1 is placed on the work floor 89.
The working space facing the outer circumferential surface of the machine is airtight and dark. Further, in this work space, dust during maintenance is prevented from being dissipated to the outside. The sheet body 92 has a window 107 for lighting that can be opened and closed as appropriate.
is formed, improving workability. These sheet bodies can be stably held even in strong winds and maintain dustproof and blackout functions.

The sheet bodies 92, 102, 103 may be made of a translucent material when the work space does not need to be dark and the only purpose is to prevent dust from scattering. These sheet bodies may have white outer surfaces to make it difficult to absorb solar radiant heat.

As described above, according to the present invention, the flexible cables 113 are arranged along the surface of the convex body, and the flexible cables 113 are arranged along the surface of the convex body.
3, the working means is guided and moved, so there is no need to temporarily install a scaffold from the ground around the outer circumference of the convex body 1, and moreover, work can be carried out on any convex body having various curvatures. It becomes possible. This reduces the time required for the work, making it possible to perform the work safely and efficiently.

In particular, according to the invention, the working means 141, 17
0, 200, 210, 240, and 241 are removably attached to the trolley 121, which is driven to be displaced up and down along the flexible cable 113 by a vertical movement motor 123, and is moved between the scaffolding body 6 and the connecting body. 7 is a roller 71 driven by a lateral movement motor 73.
This makes it possible to move the convex body 1 in the lateral direction, i.e. in the circumferential direction, and thereby the working means 14
1,170,200,210,240,241
This makes it possible to easily work on the convex body 1.
Moreover, this working means is a motor 123 for vertical movement.
and the lateral movement motor 73, it is easy to accurately bring the convex body 1 to the desired surface position. In this way, work can be performed at a desired surface position of the convex body 1.

Further, according to the present invention, the cart 121 is provided with a holder 135, and the holder 135 is angularly displaceable on the surface of the convex body 1, with an extension line of one radius line of the convex body 1 as the axis of rotation. , the holder 135 is driven for angular displacement around this rotational axis by the holder driving motor 134, and the holder 135 is
, the plurality of working means 141, 170, 2 described above are used.
00, 210, 240, and 241 are removably attached to each other so that defects on the surface of the convex body 1 can be repaired. Therefore, the range of defect repair can be changed without moving the relatively large trolley 121 and the scaffolding body 6, thereby significantly improving work efficiency.

The flexible cable 113 extends vertically along the surface of the convex body 1, and a working means is attached via a holder 135 to a cart 121 that is vertically displaced along the cable 113. Therefore, it is certain that the working means performs the work on the surface of the convex body 1, and this means that the scaffolding body 6 has its telescopic driving means, such as the Turk buckle 75, 77 and the hydraulic cylinder 76.
Therefore, even if the work means is separated from the surface of the convex body 1, the surface of the convex body 1 can be worked on.

A plurality of scaffold bodies 6 are connected by pin-bonding the top and bottom. This scaffolding body 6 forms a parallelogram link in a vertical plane, and among the plurality of scaffolding bodies 6, the remaining scaffolding bodies excluding the topmost scaffolding body 6a and the scaffolding body 6e arranged below it. On the diagonal of the parallelogram links of the bodies 6b, 6c, and 6d are telescopic drive means 7.
5, 76, 77 are provided, the convex body 1
For example, even if a corridor 74 is attached to the surface of the scaffolding bodies 6b, 6c,
6d can be placed. In such a case,
As described above, the working means is provided on the flexible cable 113 via the trolley 121, so that it is possible to work on the surface of the convex body 1 with the working means.

Furthermore, according to the present invention, a rail 68 is fixed to the upper part of the convex body 1 along the circumferential direction,
The movable body 66 is movable along this rail 68, and a drive roller 71 is provided on the scaffolding body 6, and this drive roller 71 is rotationally driven by a lateral movement motor 73, so that it can be pinned up and down. The plurality of scaffold bodies 6 to be coupled are prevented from being twisted laterally, so that the flexible cables 113 and the plurality of scaffold bodies 6 can be moved laterally in a state extending vertically.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a perspective view showing the framework of a scaffolding body 6 included in the scaffolding device 4, and FIG. 3 is a front view of the scaffolding body 6 as seen from the convex body 1 side. 4 is a plan view of the scaffolding body 6, FIG. 5 is a side view of the parallelogram link 19, FIG. 6 is a perspective view showing a part of the lower part of the parallelogram link 19, and FIG. 7 is a scaffolding. 8 is a simplified side view of the body 6a, FIG. 8 is a plan view of the connecting body 7 and the holding means 9, FIG. 9 is a sectional view taken along the cutting plane line - of FIG.
Sectional view taken from the cutting plane line - in the figure, No. 11
12 is a plan view of the vicinity of the truck 121, FIG. 13 is a sectional view of the vicinity of the truck 121, FIG. 14 is a perspective view of the vicinity of the truck 121, and FIG. 15 is a plan view of the vicinity of the truck 121. 16 is a flowchart showing the working process for diagnosing the health of the convex body 1.
Figure 7 is a sectional view of the shot blasting working means, the first
Figure 8 is a perspective view of the magnetic particle flaw detection work equipment, Figure 19 is a block diagram showing the electrical configuration for magnetic particle flaw detection, Figure 20 is a flowchart showing the working process of magnetic particle flaw detection, and Figure 21 is ultrasonic flaw detection. FIG. 22 is a simplified cross-sectional view of the vicinity of the probe 182, FIG. 23 is a block diagram showing the electrical configuration of the ultrasonic flaw detection device, and FIG. 24 shows the probe 181,
182, FIG. 25 is a flowchart of the ultrasonic flaw detection work process, FIG. 26 is a perspective view of the buffing polishing work means 200, FIG. 27 is a sectional view of the work means 200, and FIG. 28 29 is a perspective view of the grinder working means 210, and FIG.
30 is a block diagram showing the electrical configuration of the grinder working means 210, FIG. 31 is a flowchart showing the working process using the grinder working means 210, and FIG. 32 is another scaffolding device 5.
33 is a plan view of the scaffolding device 5,
FIG. 34 is a perspective view of the scaffolding device 5. DESCRIPTION OF SYMBOLS 1... Convex body, 4... Scaffolding device, 6... Scaffolding body, 7... Connecting body, 9... Holding means, 10... Driving means, 19, 20... Parallelogram link, 11
3... cable, 121... trolley, 135... holder, 170... ultrasonic flaw detection work means, 200...
Polishing work means, 210... grinder work means,
240...Shot blasting means, 241...
...Magnetic particle detection means.

Claims (1)

[Claims] 1 (a) A flexible cable 113 extending vertically along the surface of the convex body 1; (b) A motor 123 for vertical movement; (c) A truck 121 that is driven to be displaced up and down along the cable 113; (d) a holder drive motor 134 that drives the holder 135 by angular displacement around the rotational axis; (e) a holder drive motor 134 that is removably attached to the holder 135 and that Multiple working means 141, 170, 200, 21 for defect repair
0,240,241, (f) a first scaffolding body 6a at the top, one or more second scaffolding bodies 6e arranged below the first scaffolding body 6a at the top, and a second scaffolding body Third scaffolding bodies 6b, 6c, 6d arranged below 6e, the first to third scaffolding bodies 6a, 6e, 6b, 6
c, 6d are shaft bones 11, 12 extending vertically;
Connecting members 13a, 14a; 13, 14 connecting these shaft bones 11, 12 form parallelogram links in the vertical plane, and connect the shaft bones 11, 12 of each scaffold 6a to 6e vertically. The first and second scaffold bodies 6a, 6 are connected with pins, respectively.
It is constructed by fixing the shaft bone 12 on the side of the convex body 1 of e to the cable 113, and telescopic drive means 75, 76, 77 are provided on the diagonal lines of the parallelogram links of the third scaffolds 6b, 6c, 6d. Such first to third scaffolding bodies 6a, 6e, 6b, 6c, 6d
(g) a connecting body 7, (g1) a first connecting member 62 whose lower end is pin-coupled by a pin 312 to the shaft bone 12 of the uppermost scaffolding body 6a near the convex body 1; , (g2) has a lower end portion pin-coupled by a pin 311 to another shaft bone 11 disposed away from the convex body 1 of the first scaffold body 6a at the top, and a connecting member 62 and a second connecting member 61 which has an upper end portion pin-coupled by a pin 64 and is configured to be expandable and contractible.
(h) holding means 9; (h1) a rail formed in an annular shape around a vertical axis 280 passing through the center 8 of the convex body 1 and fixed to the top of the convex body 1; 68; (h2) a movable body 66 that extends in the circumferential direction of the rail 68 along the rail 68 and to which the upper end of the first connecting member 62 is pin-coupled; (h3) the first connecting member 62 and the movable body 66; A pair of rollers 67 are respectively pivotally supported by a movable body 66 near a position where the rollers are pin-coupled, and are supported and run along a radially inner guide surface 68a of a rail 68. means 9; (i) pivoted to the shaft bone 12 of the scaffolding body 6 near the convex body 1; A surface defect detection and repair device comprising: (j) a driving roller 71 that rotates; and (j) a driving roller motor 73 that rotationally drives the driving roller 71.