JPH0333382B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an inspection coating device for coating the exterior surface of a cylindrical tank.

(Prior art) Generally, large cylindrical tanks are used to store large amounts of city gas or petroleum, but the external coating of these cylindrical tanks tends to corrode, peel, and abrade during long-term use. Because it is damaged by
It is necessary to regularly inspect and repair the exterior coating, and it is also necessary to apply exterior coating when a new cylindrical tank of this type is installed.

Conventionally, the damage to the exterior paint and the extent of the damage are visually inspected, and repairs are carried out using sandblasting or shot blasting on the areas that require repair, without using automated equipment, using methods that are almost manual. Blasting, painting, and coating film thickness inspection were carried out.

The roof of the above-mentioned cylindrical tank has a gentle slope, allowing workers to proceed with the work while walking.However, for the outer surface of the cylindrical tank's peripheral wall, it is necessary to erect scaffolding and work on that scaffolding, or work on a gondola-style workbench. Methods such as doing this have been adopted.

For example, in Japanese Patent Laid-Open No. 54-97816, a movable body is provided that spans the entire height of the circumferential wall of the cylindrical tank as an outer surface workbench device for inspecting and painting the outer surface of the circumferential wall of the cylindrical tank. A guide wheel at the upper end side is rolled along a guide rail at the upper end of the peripheral wall, an auxiliary roller at the lower end of the movable body is rolled along the outer surface of the peripheral wall, and a plurality of work platforms are provided in the middle of the movable body, A device is described in which the moving body is moved along the outer surface of the surrounding wall while working on the outer surface of the surrounding wall on a workbench.

(Problems to be Solved by the Invention) The scaffolding, gondola-type workbench, or outside workbench device used for working on the outer surface of the circumferential wall of the cylindrical tank all have a work floor (workbench) for workers to work on. These workbenches cannot eliminate dangerous and inefficient work at high places, and they can automate and increase efficiency of tasks such as inspection, sandblasting, painting, and film thickness measurement. It is simply impossible to do so.

The same applies to the work on the outer surface of the roof of the cylindrical tank, and the reality is that no technology has yet been proposed to automate and improve the efficiency of the work on the outer surface of the roof.

(Means for Solving the Problems) The inspection and coating apparatus for coating the exterior surface of a cylindrical tank according to the present invention is provided with a first carriage for inspecting and painting the exterior coating of the roof of the cylindrical tank. A movable beam is disposed from the center of the side to the outer peripheral edge and is rotatably supported in the circumferential direction and guides the first carriage in the radial direction of the roof, radial drive means for driving the carriage in the radial direction along the movable beam; circumferential drive means for driving the movable beam in the circumferential direction; a second carriage, support means for supporting the second carriage at an outer end of the movable beam;
A vertical driving means for driving the carriage in the vertical direction is provided.

(Function) In the inspection coating apparatus for coating the exterior surface of a cylindrical tank according to the present invention, the first carriage for inspecting the exterior coating of the roof of the cylindrical tank is moved in the radial direction of the roof along the movable beam by the radial drive means. When the first carriage is driven and the movable beam is rotated in the circumferential direction by the circumferential drive means, the first carriage moves over the entire area of the roof.

Further, since the second carriage used for inspection and painting of the outer surface coating of the peripheral wall of the cylindrical tank is supported by the outer end of the movable beam by the support means, the second carriage is
When the carriage is driven up and down by the vertical drive means and the movable beam is rotated in the circumferential direction by the circumferential drive means, the second carriage moves over the entire outer surface of the peripheral wall.

(Effects of the Invention) According to the inspection and coating apparatus for painting the external surface of a cylindrical tank according to the present invention, as explained above, by moving the movable beam in the circumferential direction, the first carriage can be moved over the entire area of the external surface of the roof. In addition, since the second carriage can be moved over the entire area of the outer surface of the peripheral wall, work such as inspection and painting of the outer surface of newly installed cylindrical tanks or existing cylindrical tanks can be automated and automated.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The inspection and painting device for the external surface coating of a cylindrical tank according to this embodiment automatically inspects the external surface coating of the cylindrical tank T, automatically sandblasts defective areas of the coating and areas that require repair in the vicinity, and automatically The coating is applied automatically, and the film thickness is automatically inspected after painting.

As shown in FIG. 1, the above-mentioned inspection and coating apparatus includes a first carriage 1 for inspecting the exterior coating of the roof R of the cylindrical tank T, and a first carriage 1 for inspecting the exterior coating of the peripheral wall W of the cylindrical tank T. 2 cartridge 2
The first carriage 1 has a roof R.
The second carriage 2 is attached to a movable beam 3 disposed on the upper surface in a radial direction from the center to the outer periphery, and is driven in the radial direction along the movable beam 3. is suspended via a wire 4a by a hoisting device 4 (see FIG. 4) provided at the outer end of the movable beam 3, and is driven vertically along the peripheral wall W.

A support vehicle 5 is prepared, which is equipped with various equipment for supplying the necessary power, compressed paint, compressed air, sand for blasting, and control cables to the first carriage 1, second carriage 2, and drive devices. It is assumed that this support vehicle 5 moves around the cylindrical tank T in accordance with the movement of the movable beam 3.

Of course, there are many cases where there is not enough space around the cylindrical tank T, and even if there is space, above-ground piping is often provided; Supply sources of power, etc. in place of the support vehicle 5 shall be provided at ~3 locations.

The movable beam 3 has supporting idlers 6 (see FIG. 1) that roll on the upper surface of the roof R at appropriate intervals in the radial direction, and as shown in FIG. It is supported by a ring member 7 at the center of the ring member 7, and is rotatable around a vertical axis along a ring-shaped guide rail 7a provided on the upper surface of the ring member 7.

However, as shown in FIG. 2A, a guide ring 7b having an H-shaped or L-shaped cross section is provided on the outer circumferential side of the manhole cylindrical member 7A in the center of the roof R of the cylindrical tank T.
The inner end of the movable beam 3 may be rotatably supported by engaging the idler ring 7c at the inner end of the movable beam 3 with the guide ring 7b.

Furthermore, as shown in FIG. 4, the outer end of the movable beam 3 extends slightly outside the outer peripheral edge of the roof R, and a pair of running wheels 8 made of rubber rollers are provided below the outer end of the movable beam 3. These running wheels 8, which are provided and rotated synchronously by an electric motor 9, roll on an annular track on the outer periphery of the roof R without slipping.

However, in addition to the above-mentioned running wheel 8 made of rubber rollers, a metal running wheel may be made to run on the guide rail, or a ring-shaped rack may be attached to the ring-shaped track portion, and the ring may be moved by a pinion meshing with this rack. The outer end of the beam 3 may also be driven.

In the above configuration, the idler wheel 8 is
When the movable beam 3 is rotationally driven, the inner end portion of the movable beam 3 rotates along the guide rail 7a of the ring member 7, and the movable beam 3 rotates in the circumferential direction along the upper surface of the roof R.

Note that the movable beam 3 does not have to have a steel pipe truss structure as shown in the figure; for example, it may be box-shaped, H-shaped, or
The movable beam 3 may be composed of one or more members having an I-shaped cross section, and the movable beam 3 is configured to be telescopic and length adjustable in the radial direction of the tank T so as to correspond to the size of the diameter of the tank T. Sometimes.

The first carriage 1 is attached to the movable beam 3 by the mechanism illustrated in FIG.
The inspection coating unit 10A is attached to the first carriage 1 in the illustrated case.

A pair of upper and lower guide members 11 with an L-shaped cross section are provided on the sides of the movable beam 3 over substantially the entire length of the movable beam 3.
a, 11b are provided, and upper and lower guide members 11
A single rack 12 is provided between a and 11b.

A pair of support wheels 13 provided on the back side of the first carriage 1 are rotatably mounted in grooves of the guide member 11b, and a pair of upper guide wheels 14a on the back side are engaged with the guide member 11a. At the same time, the lower pair of guide wheels 14b are connected to the guide member 1.
1b.

Furthermore, the first carriage 1 is provided with a pinion 15 that meshes with the rack 12 and a motor 16 that drives the pinion 15.

As described above, the first carriage 1 is connected to the movable beam 3.
The movable beam 3 is supported on the side of the movable beam 3 so as to be movable in the radial direction, and is reciprocated along the movable beam 3 by the rotational driving force of the motor 16 via a rack and pinion mechanism.

As shown in FIGS. 4 and 5, the second carriage 2 moves along the outer surface of the peripheral wall W of the cylindrical tank T.
is a hoisting device 4 installed at the bottom of the outer end of the movable beam 3.
It is supported by and driven in the vertical direction.

The hoisting device 4 includes a motor 1 driven by a motor 17.
The second carriage 2 is suspended by a pair of wires 4a fed out in a V-shape from a pair of drums 18.

The second carriage 2 is equipped with a ball-shaped guide ring that rolls along the outer surface of the circumferential wall W, an electromagnet that generates an attractive force with the circumferential wall W, etc., and moves vertically along the outer surface of the circumferential wall W. It is also possible to move in the circumferential direction.

In the case shown in FIG. 5, the second carriage 2 is equipped with an inspection coating unit 10B.

However, in place of the hoisting device 4, a movable beam 3
A guide member is provided vertically from the outer end of the carriage along the peripheral wall W, and the second carriage 2 is supported by the guide member, and like the first carriage 1, the second carriage 2 is driven in the vertical direction via a rack and pinion mechanism. Alternatively, the second carriage 2 may be driven in the vertical direction by a screw shaft of the guide member and a screw nut meshing with the screw shaft.

By the way, the motor 9 that drives the movable beam 3 in the circumferential direction, the motor 17 of the hoisting device 4, and the first
The motors 16 that drive the carriage 1 in the radial direction are each provided with a rotary encoder (hereinafter referred to as an encoder) that detects the rotation angle of the motor, and detection signals from each encoder are sent to a control unit provided in the support vehicle 5. The motors 9, 16, and 17 are controlled in a feedback manner by the electric servo mechanism of the control unit.

Next, the inspection coating unit 10A detachably attached to the first carriage 1 will be briefly explained with reference to FIG.

The inspection coating unit 10A is used for inspecting whether the coating film is damaged (corrosion, peeling, abrasion, etc.), repairing defective areas, and measuring the thickness of the coating film after painting. It is structured as follows.

That is, a base frame 19 is fixed to the lower end surface of the first carriage 1 with bolts, and the base frame 19 and end plate 20 are connected to four connecting rods 21 and a guide rod 22 that are oriented perpendicularly to the movable beam 3. A head block 24 is attached to the guide rod 21 so as to be slidable in the axial direction but not rotatable, and a pinion 26 driven by a motor 25 of the head block 24 meshes with the rack of the rack shaft 23. Therefore, the headblock 24 is connected to the motor 25.
This makes it possible to reciprocate about 1500 mm along the guide rod 22 via a rack and pinion mechanism.

The head block 24 includes an infrared sensor 27 for inspecting the presence or absence of paint defects, a spray gun 28 for painting, a film thickness measuring device 29 for measuring the thickness of the paint film, and a film thickness measuring device 29 installed on a steel plate. An electromagnet 30 (magnet) that is brought into close contact with the surface is provided, and the film thickness measuring device 29 and the electromagnet 30 are brought into close contact with the steel plate surface by means of a solenoid or an air cylinder 31.

The hood 32 is used to cover the moving area of the headblock 24 during inspection using the infrared sensor 27 and during painting using the spray gun 28. The hood 32 is guided by the connecting rod 21 and is driven by a mechanism not shown in the drawings into an extended state and a folded state. It is becoming more and more common.

Note that the head block 24 is connected to the guide rod 2.
As a mechanism for reciprocating movement along 2, in addition to the above, a mechanism driven via a ball screw shaft and a ball screw nut driven by a motor, a reciprocator mechanism using an endless chain driven by a motor, etc. can be applied. . Further, the hood 32 is configured to be opened and closed by having both ends hung around the drum of the motor in forward and reverse directions, and via a wire passing through a pulley on the end plate 20 side.

As shown in FIG. 7, the infrared sensor 27 irradiates the painted surface with infrared rays from a predetermined angle, detects the reflected infrared rays, and detects the presence or absence of defects in the paint film and the type of defects based on the magnitude of reflectance. This is what I did.

However, in addition to the infrared sensor 27, it is also possible to detect defects in the coating film using an ultrasonic sensor.

a control cable to the infrared sensor 27;
A compressed paint supply hose and a compressed air supply hose to the spray gun 28, a control cable to the film thickness measuring device 29, a power supply cable to the electromagnet 30, a power supply cable to the motor 25, and the rotation angle of this motor 25. The control cable to the encoder to be detected, the power supply cable to the motor 16, the control cable to the encoder to detect the rotation angle of this motor 16, and other necessary hoses and cables are assembled into a bundle to form a collective cable. 33A extending from the ground support vehicle 5.

Infrared sensor 2 of the above inspection coating unit 10A
After inspecting the exterior coating of the entire surface of the roof R in step 7, a blasting unit (not shown) is attached to the first carriage 1, and sandblasting is performed on defective areas of the coating.

The blast unit is an inspection painting unit 10A.
It has the same structure as the head block 24 mentioned above.
It is equipped with a blast nozzle that ejects sandblast and a suction shoe that sucks sand and rust powder after the blasting process. It is also possible to assemble the above-mentioned blast nozzle and suction shoe to the head block 24 of the inspection and coating unit 10A.

A hose that supplies a mixed fluid of compressed air and sand to the blast nozzle, a hose that sucks dust from the suction shoe, and other power supply cables and control cables are incorporated into the collective cable 33A together with inspection and painting cables and hoses. ing.

As shown in FIGS. 1 and 4, the collective cable 33A is extended upward from the support vehicle 5, and is sent to the first carriage 1 via a cable feeding device 34A provided at the outer end of the movable beam 3. It is extending.

The cable feeding device 34A is configured to sandwich and insert the cable assembly 33A between a pair of pulleys 35, and rotate one of the pulleys 35 with a motor 36 to drive the cable assembly 33A in the feeding direction or the winding direction. This is what I did.

The motor 36 is driven substantially in synchronization with the first carriage 1.

Next, the inspection coating unit 10B and the blasting unit 10C installed in the second carriage 2 will be explained with reference to FIGS. 5 and 6.

The above-mentioned inspection painting unit 10B is assembled integrally with the second carriage 2, and similarly to the above-mentioned inspection painting unit 10A, it includes a base frame 37, end plates 38, 4
Book connecting rod 39, guide rod 40, rack shaft 41, opening/closing hood 42, head block 4
3. It is equipped with an infrared sensor 44, a spray gun 45, a film thickness measuring device 46, an electromagnet 47, etc. The guide rod 40 extends horizontally in the circumferential direction, and the head block 43 is easily rotated by the driving force of a motor 48.
along the guide rod 40 by the pinion mechanism.
It is designed to be driven back and forth by 1500mm.

The hoses and cables necessary for this inspection and painting unit 10B are collected together with the hoses and cables necessary for the blasting process into a collection cable 33B, and this collection cable 33B is connected to the support vehicle in the same way as the collection cable 33A described above. 5 and extends upwardly to the second carriage 2 via a cable feeder 34B at the outer end of the movable beam 3. This cable feeding device 34B is similar to the one described above, and the motor 49 is driven substantially synchronously with the motor 17 of the hoisting device 4.

The above-mentioned blast unit 10C is assembled integrally with the second carriage 2 as shown in FIG. A hopper 52 is provided below the blast nozzle 51 to receive sand and rust particles falling from the vicinity of the blast nozzle 51, and a suction hose 53 is connected to the bottom of the hopper 52.

In addition, even during sandblasting, it can be covered with a hood 54 to prevent dust from scattering.

It goes without saying that the inspection coating unit 10B and the blasting unit 10C may be integrated as a unit.

Hereinafter, the overall configuration and control system of the inspection and coating apparatus for coating the outer surface of a cylindrical tank in this embodiment will be explained with reference to FIGS. 8 to 17.

The above-mentioned inspection and coating apparatus is comprised of various mechanisms and various devices as shown in the overall block diagram of FIG. 8.

The position control mechanism controls the inspection and coating unit 10 via the movable beam 3, the hoisting device 4, the first carriage 1, the second carriage 2, and their drive devices.
This is a mechanism for controlling the positions of the head blocks 24, 43, and 50 of the blast unit A, 10B, the blast unit attached to the first carriage 1, and the blast unit 10C.

The defect measurement mechanism includes an inspection coating unit 10 attached to the first carriage 1 and the second carriage 2.
This is a mechanism for inspecting the external coating of the roof R and surrounding wall W using the infrared sensors 27 and 44 of A and 10B.

The blasting mechanism includes a compressor, a sand supply mechanism, etc. on the support vehicle 5 side, and is a mechanism that performs sandblasting on repaired areas of the external surface painting with a blasting unit attached to the first carriage 1 or the second carriage 2.

The painting mechanism also includes a paint pressurizing pump, a compressor, etc. on the support vehicle 5 side, and is connected to the first carriage 1 and the second carriage.
Inspection painting unit 1 attached to carriage 2
This is a mechanism for painting repaired areas on the exterior surface using spray guns 28 and 45 of 0A and 10B.

The film thickness measuring device is an inspection coating unit 10A, which is attached to the first carriage 1 or the second carriage 2.
This is a mechanism for measuring the coating film thickness of the repaired area using the film thickness measuring devices 29 and 46 of 10B.

The color plotter 55 (see FIG. 12) plots defective parts of the external coating detected by the defective part measuring mechanism by coloring them according to the type of defect (corrosion, blistering, etc.).

The defective data printed out from the color plotter 55 is visually inspected and corrections are made to the repaired areas using a felt pen or the like.

The eye tracer 56 (see FIG. 13) receives the data of the defective part corrected as described above, reads the data, and outputs the data to the CPU 60 (central processing unit) via the input/output interface 59. It is.

For CPU60, the above eye tracer 5
6 is processed by a predetermined control program stored in the control program memory 61 to calculate signals for controlling the position control mechanism, the blasting mechanism, the coating mechanism, and the film thickness measurement mechanism,
The signal is stored in the arithmetic data memory 62 as needed, and outputted to the position control mechanism, blasting mechanism, coating mechanism, film thickness measuring mechanism, and magnetic storage device via the input/output interface 59.

In other words, while reading the data of the repaired area using the eye tracer 56, the blasting process is automatically applied to the repaired area on the entire outer surface of the tank T.
It can be used to apply coatings and measure film thickness.

The magnetic storage device stores uncorrected data (data output from the color plotter 55) of inspection results by the defect measurement mechanism, corrected data input to the eye tracer 56, etc. on a floppy disk or the like. It is something to keep.

The monitor television displays the data being detected by the defect measurement mechanism in the same display pattern as the color plotter 55, and
Displays the position of the carriage 2 and the position of the repair head (blast nozzle, spray gun, film thickness measuring device) during the actual repair (blasting, painting, film thickness measurement) along with data on defective parts to be repaired. It is used to display images on the same screen, and consists of one or more monitor televisions. Note that various data output to the monitor television are recorded by a recording device as necessary.

The operation panel is provided near the control unit of the support vehicle 5, and the portable operation panel is provided near the first carriage 1 and the second carriage 2, respectively.

The input/output interface, CPU, control program memory, calculation data memory, operation panel, etc. are incorporated into the control unit of the support vehicle 5.

Next, a control system for the position control mechanism, defect measurement mechanism, coating mechanism, and film thickness measurement mechanism will be explained.

The position control mechanism is controlled as shown in the block diagram of FIG. 10 based on the coordinate system shown in FIG.

In the coordinate system shown in FIG. 9, the Z-axis is set along the movable beam 3 from the inner end to the outer end, and the motor drives the first carriage 1 in the radial direction along the movable beam 3. 16 is a Z-axis motor.

Further, the C-axis is set in the direction of arrow C (circumferential direction) in which the movable beam 3 moves, and the motor 9 that drives the movable beam 3 in the circumferential direction is the C-axis motor.

Also, from the outer end of the movable beam 3 downward
The motor 17 of the hoisting device 4 that drives the second carriage 2 in the vertical direction is a Y-axis motor.

Furthermore, the motor 25 for driving the head block 24 of the inspection and painting unit 10A attached to the first carriage 1 and the motor corresponding to the above-mentioned motor of the blast unit (not shown) are the X1-axis motors.

Further, the motor 48 that drives the headblock 43 of the inspection coating unit 10B attached to the second carriage 2 and the motor 57 that drives the headblock 50 of the blasting unit 10C are X2-axis motors.

As shown in FIG. 10, each of the above motors 9, 1
6, 17, 25, 48, and 57 are provided with encoders that detect the respective rotation angles, and detection signals from each encoder are sent to the input interface 59.
a to the CPU 60, and based on these detection signals, the CPU uses a predetermined control program.
60, each motor 9, 16, 17, 25, 4
8, 57 are calculated, and these command signals are output to each motor 9, 16, 17, 25, 48, 57 via the output interface 59b, and the infrared sensors 27, 44 and the outer surface coating of the roof R are The positions of the repair head that performs repair processing on the outer surface coating of the peripheral wall W and the repair head that performs repair processing on the outer surface coating of the peripheral wall W are feedback-controlled.

First, the movable beam 3 is positioned near the walkway structure S extending between the peripheral wall W of the cylindrical tank T and the roof R, and the first carriage 1 is positioned at the inner end of the movable beam 3, and the second carriage 2 is positioned at the upper end of the peripheral wall W. Inspection and repair work are started from a position nearby.

Then, the infrared sensor 27 of the first carriage 1
The infrared sensor 4 of the second carriage 2 scans in the X1 axis direction at a pitch of about 50 mm on a fan-shaped area that is about 1500 mm in the circumferential direction on the outer circumferential side.
4 is about 1500 mm in the circumferential direction, and a rectangular area extending over the entire length of the peripheral wall W is scanned in the X2 axis direction at a pitch of about 50 mm.

When applying the coating, it is almost the same as above, but since the coating width per pass by the spray guns 28 and 45 is about 250 to 400 mm, the scanning pitch is set to about 250 to 300 mm. Ru.

On the other hand, in the case of blasting, approximately 50~
The pitch is 100mm each.

The monitor television in FIG. 10 includes, for example, infrared sensors 27, 44, repair head 28,
The position coordinates of 29, 45, 46, 51, etc. are displayed.

The defect measurement mechanism is controlled by the control system shown in Fig. 11, and the measurement data is printed out in different colors by a color plotter 55 as shown in Fig. 12. Then, appropriate corrections are made using a felt-tipped pen or the like, and the corrections are input to the eye tracer 56 as shown in FIG.

The blasting mechanism is controlled by the control system shown in FIG. 14, the coating mechanism is controlled by the control system shown in FIG. 15, and the film thickness measurement mechanism is controlled by the control system shown in FIG. 16.

In addition, when performing painting on the external surface of the cylindrical tank T using the inspection painting apparatus according to the above embodiment, repair processing such as defect measurement blasting may be performed on the entire area of the external surface. It may be performed for each partial area.

In the above embodiment, a case was explained in which the external surface coating of an existing cylindrical tank T was repaired, but this inspection coating equipment can perform blasting,
Needless to say, painting, film thickness measurement, etc. can be carried out in the same way.

Incidentally, shot blasting may be performed instead of sand blasting in the above embodiments.

Next, the above embodiment may be partially modified as shown in the overall block diagram of FIG. 17.

Instead of inspecting paint film defects using the infrared sensor, this inspection and coating device scans the exterior coating of the tank T with a TV camera, records the image on a recording device via a monitor TV, and then While displaying the recorded data on a CRT-type input device, a human judge determines whether or not repairs are necessary, inputs directions for repair areas with a light pen, records the data on a magnetic storage device, and records it on a recording device. Based on the above data, the CPU 60 uses a control program to create control data for controlling the position control mechanism and records this in the magnetic storage device. During actual repair, the control data is read from the magnetic storage device and repaired by the repair head. I am trying to do this.

As mentioned above, in order to scan the external coating of the tank T with a television camera, the head blocks 24 and 43 of the inspection coating units 10A and 10B attached to the first carriage 1 and the second carriage 2 are
A television camera is attached to each. Note that the television camera drive mechanism in the figure is a mechanism for zooming up the television camera.

As mentioned above, when scanning the exterior paint with a TV camera, it is significantly more efficient than scanning with an infrared sensor, as the TV camera can capture an area of about 1 ^m2 , and paint defects are eliminated. Since the judgment is made by humans, mistakes in detecting defective parts can be prevented.

In the above embodiment, a case was explained in which the inspection and repair of the outer surface coating of a cylindrical tank was automated almost entirely by computer control, but the movement of the movable beam in the circumferential direction, etc., was controlled by push buttons from the operation panel. Alternatively, a defect measuring unit, a blasting unit, and a painting unit may be installed in parallel on the first and second carriages, respectively, and a series of these operations may be performed in parallel, and defect measurement may be performed by human visual inspection. It is also possible to configure the system so that the determination is made and the position information of the defective part is output to the control unit.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall perspective view of a cylindrical tank and an inspection coating device for painting the outside surface of the cylindrical tank; FIG. 2 is a perspective view showing the top of the cylindrical tank and a part of the movable beam; FIG. 2A is a longitudinal sectional view of the inner end support structure of the movable beam in a modified example;
Figure 3 is a perspective view of a part of the movable beam, the first carriage, and the inspection coating unit, Figure 4 is a perspective view of the outer end of the movable beam and the equipment attached thereto, and Figure 5 is a perspective view of the hose feeder. A perspective view of a feeding device, a hoisting device, a second carriage, and an inspection coating unit, FIG. 6 is a perspective view of a second carriage and a blasting unit, and FIG. 7 is a diagram showing a state in which an infrared sensor is inspecting the external coating. Figure 8 is a block diagram of the overall configuration of the inspection and repair equipment, Figure 9 is an explanatory diagram of the coordinate system in the inspection and painting equipment, Figure 10 is a block diagram of the overall configuration of the position control mechanism, and Figure 11 is the overall configuration of the defect measurement mechanism. Block diagram: Fig. 12 is an explanatory diagram of output data from the color plotter, Fig. 13 is an explanatory diagram of input data to the eye tracer, Fig. 14 is a block diagram showing the configuration of the main parts of the blast mechanism, and Fig. 15 is an explanatory diagram of the output data from the color plotter. 16 is a block diagram showing the configuration of the main parts of the coating mechanism, FIG. 16 is a block diagram of the overall configuration of the film thickness measuring mechanism, and FIG. 17 is a diagram corresponding to FIG. 8 of a modification of the inspection coating apparatus. T... Cylindrical tank, R... Roof, W... Peripheral wall,
1...First carriage, 2...Second carriage,
3... Movable beam, 4... Hoisting device, 4a... Wire, 8... Running wheel, 9... Motor, 11a, 1
1b...Guide member, 12...Rack, 13...
Support wheels, 14a, 14b... Guide wheels, 15...
Pinion, 16...Motor, 17...Motor, 1
8...Drum.

Claims (1)

[Scope of Claims] 1. A first carriage used for inspection and painting of the external surface coating of the roof of the cylindrical tank, and a first carriage disposed from the center to the outer peripheral edge of the external surface of the roof of the cylindrical tank and extending in the circumferential direction. a movable beam that is rotatably supported and guides the first carriage in the radial direction of the roof; radial drive means that drives the first carriage in the radial direction along the movable beam; a second carriage for inspecting and painting the outer surface of the peripheral wall of the cylindrical tank; supporting means for supporting the second carriage on an outer end of the movable beam; 1. An inspection coating device for coating an external surface of a cylindrical tank, characterized in that it is equipped with a vertical driving means for vertically driving a cylindrical tank.