JPH0259256B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a working device that can be suitably implemented to perform maintenance work on, for example, a spherical gas holder filled with city gas.

Conventionally, in order to diagnose the health of a gas holder, a scaffold is erected at a high place around the entire circumference of the gas holder, and a non-destructive test is performed manually. Therefore, a great deal of labor is required to assemble the scaffold, and such a scaffold must be assembled for each gas holder, which requires a great deal of labor and time. Further, in order to form a scaffold over the entire circumference of such a gas holder, 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 working device that allows work such as nondestructive testing to be performed easily, safely, and efficiently with a small number of people and a small amount of time.

The present invention includes a flexible cable 113 that extends vertically along the surface of the curved surface body 1, a truck 121 having a vertical movement motor 123 that drives vertical displacement along the cable 113, and a truck 121 that is attached to the truck 121. , working means 141, 170, 200, 210 for working on the curved body 1,
240, 241, axial bones 11, 12 extending up and down, and these axial bones 1
A parallelogram link is formed in the vertical plane by the connecting members 13 and 14 connecting the parts 1 and 12, and the telescopic driving means 75,
A plurality of scaffold bodies 6 are provided with pins 76 and 77 and are connected by pins at the top and bottom, a connecting body 7 is connected to the uppermost scaffold body 6a by pins 312 and 313, and a connecting body 7 is fixed to the upper part of the curved body 1. , a rail 68 extending in the circumferential direction; a movable body 66 to which the upper end of the connecting body 7 is attached and movable by the rail 68; This working device is characterized by including a drive roller 71 that rolls along the outer peripheral surface of the body 1, and a lateral movement motor 73 that rotationally drives the drive roller 71.

FIG. 1 is a side view of one embodiment of the present invention. A gas holder 1, 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 gas holder 1 has a hollow spherical shape,
A scaffolding device 4 is provided to maintain the outer circumferential surface of the upper hemisphere portion which is a convex body projecting upward, and a scaffolding device 5 is provided to maintain the outer circumferential surface of the lower hemisphere portion which is a convex body projecting downward. It will be done.

The scaffolding device 4 is connected to a plurality of scaffolding bodies 6 that form parallelogram links in a vertical plane along the outer peripheral surface of the gas holder 1 and have scaffolding, and to the topmost scaffolding body 6a among the scaffolding bodies 6. A connecting body 7 that is
A holding means 9 that connects the connecting body 7 to the top of the gas holder 1 and supports and hangs it rotatably around a vertical axis passing through the center 8 of the gas holder 1, and a scaffolding body 6 along with the connecting body 7 in the circumferential direction of the gas holder 1 and a driving means 10 for driving.

2 is a frame diagram of the scaffold 6, FIG. 3 is a front view of the scaffold 6 as seen from the gas holder 1 side, and FIG. 4 is a plan view of the scaffold 6. Scaffolding body 6
As clearly shown in FIG. 5, a pair of axial bones 11 and 12 forming a parallelogram link;
A pair of tie members 13 and 14 are pin-coupled by pins 15 to 18 having horizontal axes perpendicular to the vertical plane containing the parallelogram links, which are indicated by reference numerals 19 and 20. Two sets are provided so that the Working floors 21, 22 are pin-coupled between the parallelogram links 19, 20 by pins 23-30. These pins 23-30
also has an axis parallel to pins 15-18. Handrails 31 and 32 are provided on the working floors 21 and 22 at the ends opposite to the gas holder 1.
22 is vertically installed. Work floor 21, 22
is a parallelogram link 1 in the circumferential direction of the gas holder 1
A ladder 3 partially extends between the passages 9 and 20 and extends vertically through the passages 33 and 34.
5 are connected.

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 gas holder 1 and enables the scaffolding body 6 to move smoothly in the circumferential direction of the gas holder 1. The sheet body 37 can be detached from the support member 36, making it easier to perform other tasks during the day. 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 support member 6d formed of a parallelogram link provided near the corridor 74, and between the sprocket foils 111 and 112, A chain 113 serving as a cable that can be bent along the vertical axis is stretched vertically. Similarly, sprocket foils 114 and 11 are provided on the support member 6 below the corridor 74.
A chain 116 is stretched between the two. Similarly, the sprocket foil 1 is also attached to the scaffolding device 5.
A chain 119 is stretched between 17 and 118.

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 connected by a connecting material 13
a 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 thereof seen from the side, and FIG. 10 is a sectional view taken from the cutting plane line - in FIG. 8. It is. The connecting body 7 is connected to the shaft bone 11 of the scaffolding body 6a.
A connecting member 61 is connected to the upper part of the scaffold body 6a by a pin 312, and another connecting member 62 is connected by a pin 313 to the upper part of the shaft bone 12 of the scaffold 6a. include. The connecting member 61 has a turnbuckle 63 and is pin-coupled to the connecting member 62 by a pin 64 . By adjusting the length of the turnbuckle 63, the mounting posture of the scaffolding bodies 6, 6a on the gas holder 1 can be changed. The connecting body 7 is vertically symmetrical in FIG. 9.

The holding means 9 includes a movable body 66 that supports the connecting member 62 by a pin 65, a roller 67 that is pivotally supported by the movable body 66 and has an upper and lower axis of rotation, and a roller 67 that is fixed to the top of the gas holder 1 and that rotates the roller 67 in the radial direction. An annular rail 68 guided inwardly, a holding member 69 having a radially outer end of the rail 68 fixed to a movable body 66, and a radially inner end of the rail 68 of the holding member 69 fixed to the center 8 of the gas holder 1. The support shaft member 70 is rotatably supported around a vertical axis passing through the support shaft member 70 . The holding means 9 is connected to the scaffolding body 6 via the connecting body 7.
6a is suspended along the outer peripheral surface of the gas holder 1.

FIG. 11 is a side view of the drive means 10. A drive roller 71 that contacts the outer peripheral surface of the gas holder 1 is pivotally supported on one shaft bone 12 of the scaffolding body 6 . The drive roller 71 is driven by a motor 73 via a shaft coupling 72. The motor 73 is attached to the shaft bone 12. A drive roller 71 is driven by a motor 73, thereby allowing the scaffolding bodies 6, 6a to move around a vertical axis passing through the center 8 of the gas holder 1. Therefore, maintenance can be performed over the entire circumference of the upper hemisphere of the gas holder 1.

A corridor 74 is installed on the equator of the gas holder 1. Among the plurality of scaffolds 6, the scaffolds 6b, 6c, and 6d near the corridor 74 have turnbuckles 75, hydraulic cylinders 76, and Turnbuckles 77 are provided respectively. This allows the shape of the parallelogram link to be adjusted, for example as indicated by reference numeral 78. Therefore, it becomes possible to move the scaffolding body 6 in the circumferential direction of the gas holder 1 while avoiding the corridors 74 and columns 3 that have various sizes and shapes and project radially outward from the gas holder 1. Therefore, the work can be performed at a desired position in the circumferential direction of the gas holder 1.

FIG. 12 is a plan view of the vicinity of the chain 113, FIG. 13 is a longitudinal sectional view thereof, and FIG. 14 is a perspective view thereof. The chain 113 is provided with a rack 120. The truck 121 is provided with a pinion 122 that meshes with the rack 120, and this pinion 122 is driven by a pulse motor 123. This allows the truck 121 to move along the chain 113 in the meridian direction of the gas holder 1. Chain 113 has trolley 121
A tape 124 is provided with an indication for detecting a position along the meridian direction, and a detector 125
can detect the position of the cart 121 in the meridian direction by detecting the markings on the tape 124. The chain 113 is fixed to the scaffold 6 by a support piece 126. This support piece 126 is fixed by selectively inserting mounting pins 128 into adjustment holes 127 formed at a plurality of intervals, thereby fixing the chain 1.
13 positions on the outer surface of the gas holder 1 can be set. The rack 120 is formed on each surface of the chain 113 on the gas holder 1 side (that is, on the inside) and on the surface that is away from the gas holder 1 (that is, on the outside), and the attachment point of the rack 120 on the chain 113 is
It is shifted in the circumferential direction. This prevents the truck 121 from being displaced around the chain 113 when the pinion 122 is driven by the pulse motor 123.

The truck 121 has a pair of hydraulic cylinders 129,1
30 are provided, and these cylinders 12
The rollers 131 and 132 can be brought into contact with and separated from the outer peripheral surface of the gas holder 1 by the rollers 9 and 130. One roller 131 has a rotation axis parallel to the latitude direction of the gas holder 1, and the other roller 132 has a rotation axis parallel to the meridian direction. A mounting base 133 is fixed to the trolley 121. A holder 135 is attached to this mounting base 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 plate 136 is fixed to output shaft 139 of motor 134. On the plate 137 on the side of the gas holder 1, 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 line of the gas holder 1 as the rotation axis.

As clearly shown in FIG. 14, a shot blasting working means 141 and the like can be attached to and removed from the holder 135 to perform various operations.
When moving the trolley 121 along the chain 113 with the working means attached to the holder 135, the cylinder 129 is extended to bring the roller 131 into contact with the outer circumferential surface of the gas holder 1. At this time, the roller 140 is moved from the outer circumferential surface of the gas holder 1 are estranged. In this way, the truck 121 can move in the meridian direction of the gas holder 1. Also, the scaffolding body 6
Therefore, when the chain 113 moves in the latitudinal direction of the gas holder 1, the cylinder 129 is contracted and the cylinder 130 is extended, and at this time the roller 132 is in contact with the outer peripheral surface of the gas holder 1,
The roller 140 is separated from the gas holder 1.
In this way, the cart 121 can move smoothly in the latitude direction. When performing the above-mentioned shot blasting work using the working means, both the cylinders 129 and 130 are reduced, and the roller 13
1 and 132 are separated from the gas holder 1, and the roller 140 attached to the holder 135 contacts the outer peripheral surface of the gas holder 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 truck 121 on the gas holder 1 based on the rotation angle θ in the circumferential direction.

When diagnosing the health of the gas holder, the scaffolding devices 4 and 5 are assembled as shown in FIG.
41 and 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 peripheral surface of the gas holder 1 covered with the cover 144, thereby polishing the outer peripheral surface of the gas holder 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 gas holder 1, and subsequently an ultrasonic flaw detection test is conducted to detect flaws inside the gas holder 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, painting is performed. In this way, the health diagnosis work is completed.

FIG. 18 is a perspective view of a working means for a magnetic particle flaw detection test. A coil 148 is arranged in a square annular shape on the holder 135 via a mounting piece 147. A test liquid for magnetic particle flaw detection is transferred from a pipe 150 to a nozzle 149 on the surface of the gas holder 1 surrounded by this coil 148 . 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. The surface of the gas holder 1 irradiated with ultraviolet rays on the cover 151 is detected by a fiberscope 153, and the signal from the fiberscope 153 is transmitted via an optical fiber 154 to an industrial television camera 155.
and converted into electrical signals.

FIG. 20 shows the inspection process of the magnetic particle flaw detection test. The surface portion of the gas holder 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 gas holder 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 pattern of the magnetic particles is observed using a fiber scope 153.

With reference to FIG. 19, fiberscope 15
3, the image from the objective lens 157 is the photoreceptor 158
The light is received by an optical fiber 154 and then imaged by an industrial television camera 155. The signal from this camera 155 is transmitted to an image processing device 159.
is input to the interface 160 of. The interface 160 includes a video tape recorder device 16.
1 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 connected to the interface 16.
5 to the microprocessor 163.
Interface 165 is connected to printer 166 and keyboard 167.

In this manner, 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 conduct a magnetic particle flaw detection test on different surface portions of the gas holder 1.

To conduct the ultrasonic flaw detection test, a working means 170 shown in FIG. 21 is used. A working device 170 is fixed to the holder 35 by a mounting member 171. In this ultrasonic flaw detection working means 170, the electromagnet 17 is
4,175 is attached, and this electromagnet 1
By energizing 74, 175, the support 17
2,173 can be magnetically attracted to the outer surface of the gas holder 1. A guide member 176 is fixed between the supports 172 and 173. A moving body 177 can move along this guide member 176. This moving body 177 has a pulse motor 1.
79 and 180 allow the contacts 181 and 182 to move. In this way, the pulse motor 17
The moving direction along 8 is the meridian direction of the gas holder 1 along the chain 113, and the pulse motor 179,
The moving direction along 180 is the latitude direction of the gas holder 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 moving member 1 by a pin 187.
Pin-coupled to 88. Lever 185 is spring 18
9 urges the probe 182 in a direction toward the outer peripheral surface of the gas holder 1. The moving member 188 is movable along the moving body 177 by the pulse motor 180. In this embodiment, the welding bead 190 of the gas holder 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 gas holder 1, indicated by reference numerals 197, 198, is inspected for internal flaws. It will be done. Probes 181, 182
The movement route of the robot is carried out in a zigzag manner as shown in FIG. 24.

Referring to FIG. 25, the outer peripheral surface of the gas holder 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 gas holder 1, there are a compressor 250 for pumping the grid and air for shot blasting, and a cyclone 251 for separating the grid and paint chips after the shot blasting and reusing the grid. A tank 252 that stores a test liquid for performing magnetic particle flaw detection, a tank 253 that supplies glycerin as a couplant for ultrasonic flaw detection, and the like are provided. 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 gas holder 1 with a buff. The fixture 201 is fixed to the holder 135. Frame body 20
2 is attracted and fixed to the surface of the gas holder 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 gas holder 1 is polished.

Figure 28 shows a grinding device 21 using a grinder.
FIG. The mounting member 211 is the holder 1
It is fixed at 35. Frame 212 of work device 210
An electromagnet 213 is attached to the frame body 212, whereby the frame body 212 can be magnetically attracted and fixed to the outer surface of the gas holder 1. A moving body 214 is movable along a rail 215 in the frame 212 . The moving 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 gas holder 1. The glider is a disc-shaped grindstone 218, 21
9 and motors 220, 221, and the rotational axes of these grinding wheels 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 2 attached to one end of a lever 224 which is pivotally supported on the movable body 214 via a pin 223.
It is pivoted by 25. 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 21
8 and the outer surface of the gas holder 1 is detected.
The grindstone 218 grinds away surface defects 228 detected by the magnetic particle inspection device.

FIG. 30 is a block diagram showing the electrical configuration related to the grinder working means 210. Whetstone 2
Motors 220 and 221 driving the motors 18 and 219 are controlled by a microcomputer 230. The detector 247 is the microcomputer 23
A signal corresponding to the grinding depth by the grindstone 218 is given to 0. A line printer 232 and a keyboard 233 are connected to the microcomputer 230. This microcomputer 230 also includes a position detector 125 and a magnetic particle detection means 231.
A signal is given from

With reference to FIG. 31, magnetic particle flaw detection work means 231
The results of surface defect detection are analyzed, and the grinding wheels 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, the surface defects 228 are ground using grindstones 218 and 219. When the grinding depth is large,
Perform weld overlay. Thereafter, whether or not the surface defect has been repaired is diagnosed using magnetic particle testing means. In this way, it becomes possible to automatically diagnose the health of the gas holder 1.

A back view of the scaffolding device 5 that forms a scaffold in the lower hemisphere of the gas holder 1 as seen from the outside in the hemisphere direction of the gas holder 1 (left side in FIG. 1) is shown in FIG. 32, and its plan view is shown in FIG. This is shown in Figure 33, and the third
FIG. 4 is a perspective view thereof. Center 8 of gas holder 1
An annular horizontal inner rail 81 is provided concentrically on the ground surface 2 around a vertical line passing through the ground, and an annular horizontal outer rail 82 is provided concentrically.
Wheels 84, 85 of a truck 83 are mounted on the rails 81, 82.
will be boarded and guided. Wheels 84 are supported by support arms 86 extending radially inward from truck 83, and wheels 85 are attached to support arms 87 fixed to truck 83. wheel 8
The rotation axes 4 and 85 intersect with the vertical axis passing through the center 8 of the gas holder 1 in the horizontal plane. The wheels 85 are driven by a motor 88, and thereby the cart 8
3 can be pivoted in a horizontal plane about a vertical axis passing through the center 8.

A support 90 having a step-like working floor 89 is erected on the cart 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 supports 9 and 10, and an endless annular flexible cylinder is disposed along the top of the sheet body 92. 93 is 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 gas holder 1 over the entire circumference of the annular longitudinal direction. As a result, the sheet body 9
2, 102, and 103, the space in which work is performed on the work floor 89 facing the outer peripheral surface of the gas holder 1 is airtight and dark. Further, in this work space, dust during maintenance is prevented from being dissipated to the outside. A window 107 for lighting that can be opened and closed as appropriate is formed in the sheet body 92 to improve workability. These sheet bodies can be stably held even in strong winds and maintain dustproof and blackout functions.

The invention can be broadly implemented not only in connection with gas holders, but also in connection with other convex bodies.

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.

According to the present invention, the work cart 121 is moved along the rail provided inside the gas holder 1,
This also allows automatic health diagnosis.

Each pair of chains 113, 114, 119 may be provided as in the above embodiment, or only one of them may be provided.

As described above, according to the present invention, flexible cables are arranged along the surface of the curved body, and the working means is guided and moved by the cables, so that There is no need to temporarily construct scaffolding, and work can be performed on any curved surface having various curvatures. 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
The cart 121 to which 0, 200, 210, 240, and 241 are attached has a vertical movement motor 123.
The scaffolding body 6 and the connecting body 7 are driven to be displaced vertically along the flexible cables 113 by a roller 71 driven by a lateral movement motor 73.
can be moved in the lateral direction of the curved surface 1, i.e. in the circumferential direction, whereby the working means 141, 17
0, 200, 210, 240, and 241 can easily work on the entire surface of the curved body 1. Furthermore, by using the vertical movement motor 123 and the lateral movement motor 73, it is easy to accurately bring this working means to the desired surface position of the curved surface body 1. In this way, at the desired surface position of the curved body 1,
Able to perform work.

The flexible cables 113 extend up and down along the surface of the curved body 1, and the working means is attached to the curved body 1 by means of the flexible cables 113 via the trolley 121. It is ensured that the work is carried out on the surface of the curved body 1, which means that the scaffolding body 6, by means of its telescopic drive means 75, 76, 77,
It is possible to work on the surface of the curved surface body 1 using a working means even if the surface of the curved surface body 1 is spaced apart from the surface.

A plurality of scaffolding bodies 6 are connected by pin-bonding the top and bottom. This scaffolding body 6 forms a parallelogram link in a vertical plane, and expansion/contraction drive means 75, 76, 77 are provided on the diagonal of this parallelogram link, so that the surface of the curved body 1, for example, Even if the corridor 74 is attached, the scaffolding body 6 can be installed across the corridor 74. In such a case, the working means is provided on the flexible cable 113 via the trolley 121 as described above, and therefore it is possible to work on the surface of the curved body 1 with the working means.

Furthermore, according to the present invention, a rail 68 is fixed along the circumferential direction on the upper part of the curved surface body 1,
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 one 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 seen from the gas holder 1 side. , FIG. 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 19, and FIG. 7 is a plan view of the scaffolding body 6a. FIG. 8 is a simplified side view of the connecting body 7.
and a plan view of the holding means 9, FIG. 9 is a sectional view showing the configuration shown in FIG. 8, FIG. 10 is a sectional view taken from the cutting plane line - in FIG. 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.
The figure shows the principle for detecting the position of the trolley 121, FIG. 16 is a flowchart showing the work process for diagnosing the health of the gas holder 1, FIG. 17 is a sectional view of the shot blast working means, and FIG. The figure is a perspective view of the magnetic particle flaw detection work equipment, Fig. 19 is a block diagram showing the electrical configuration for performing magnetic particle flaw detection, and Fig. 2
Fig. 0 is a flowchart showing the working process of magnetic particle flaw detection, Fig. 21 is a perspective view of the ultrasonic flaw detection work equipment, 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 work equipment, and Fig. 24 shows the probes 181, 182.
FIG. 25 is a flowchart of the ultrasonic flaw detection work process, FIG. 26 is a perspective view of the polishing work means 200 using a buff, FIG. 27 is a sectional view of the work means 200, and FIG. A perspective view of the grinder working means 210, FIG. 29 is a sectional view of the vicinity of the grindstone 218, and FIG. 30 is a perspective view of the grinder working means 210.
31 is a flowchart showing the working process using the grinder working means 210, and FIG. 32 is a block diagram showing the electrical configuration of another scaffold 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... Gas holder, 4... Scaffolding device, 6... Scaffolding body, 7... Connecting body, 9... Holding means, 10...
Drive means, 19, 20...parallelogram link, 1
13...Chain, 121...Dolly, 135...
Holder, 170... Ultrasonic flaw detection work means, 200
... Polishing work means, 210 ... Grinder work means, 240 ... Shot blasting work means, 24
1...Magnetic particle detection means.

Claims (1)

[Claims] 1. A flexible cable 113 that extends vertically along the surface of the curved body 1; a cart 121 having a vertical movement motor 123 that drives vertical displacement along the cable 113; and a cart 121. Working means 141, 170, 200, 210, which are attached to and work on the curved body 1;
240, 241, axial bones 11, 12 extending up and down, and these axial bones 1
A parallelogram link is formed in the vertical plane by the connecting members 13 and 14 connecting the parts 1 and 12, and the telescopic driving means 75,
A plurality of scaffold bodies 6 are provided with pins 76 and 77 and are connected by pins at the top and bottom, a connecting body 7 is connected to the uppermost scaffold body 6a by pins 312 and 313, and a connecting body 7 is fixed to the upper part of the curved body 1. , a rail 68 extending in the circumferential direction; a movable body 66 to which the upper end of the connecting body 7 is attached and movable by the rail 68; A working device comprising: a drive roller 71 that rolls along the outer peripheral surface of the body 1; and a lateral movement motor 73 that rotationally drives the drive roller 71.