JPH0777910B2 - Coating film peeling device for outer wall of spherical tank - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating film peeling apparatus for peeling an anticorrosion coating film / coating on the outer wall of a spherical tank for oil, gas, chemicals and the like.

[0002]

2. Description of the Related Art In a spherical tank for stockpiling oil, gas, chemicals, etc., a periodic open inspection is carried out as a safety measure for the surroundings. At that time, the anticorrosive coating applied to the wall surface of the tank had to be peeled off locally and over the entire surface of the tank. However, conventionally, an operator uses a scaffold and peels off the coating film using sandblasting or the like.

Therefore, conventionally, a large-scale scaffold surrounding the entire tank has to be assembled, and a lot of construction period and cost are required only for assembling and disassembling the scaffold. In addition, when the coating film is peeled off using sandblasting, a large amount of dust is generated, and noise is large, which has been a problem not only for hygiene of workers but also as environmental pollution to the surrounding area. Further, when sandblasting is used, not only peeling of the coating film or coating but also the base steel plate is often damaged.

In addition, the work on the scaffold is often inefficient and dangerous. Further, conventionally, in order to increase the peelability of the coating film, the coating film peeling work may be performed after the adhesive force of the peeling film is weakened with a burner or the like, which poses a risk of fire due to the use of fire.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a spherical tank outer wall coating capable of easily and safely removing coatings, coatings and the like without scaffolding in a short construction period. It is to provide a film peeling device.

[0006]

Means for Solving the Problems The gist of the present invention which has solved the above problems is as follows: 1) A gondola curved along the outer wall of a spherical tank is rotatably supported along the outer circumference of the spherical tank, and the apparatus main body is A plurality of jet nozzles for rotatably mounting along the gondola, a plurality of jet nozzles for jetting an ultrahigh pressure fluid toward a spherical tank, and a turning means for turning the jet nozzles. A coating device peeling device for an outer wall of a spherical tank, characterized in that it comprises a feeding means for feeding an ultrahigh pressure fluid to the jet nozzle. 2) The jet nozzle is provided around the rotation center thereof.
Tilt the injection direction toward the center of rotation by a predetermined angle.
The coating film peeling device for the outer wall of the spherical tank according to the above 1), which is characterized in that 3) A ska that surrounds the spray nozzle and shields the peeling work area.
1) or 2) according to the above 1) or 2), wherein the coating film peeling device for the outer wall of the spherical tank is provided. 4) A suction device having a suction port in an area closed by a skirt.
Wherein characterized in that a nozzle 3) in spherical tank exterior wall coating peeling equipment according.

[0007]

In the coating film peeling apparatus of the present invention, the apparatus main body for peeling the coating film can be vertically moved along the gondola, and the gondola can be rotated along the outer circumference of the spherical tank. Therefore, by repeating the method of performing the peeling work while vertically moving the device body along the gondola, rotating the gondola laterally for a predetermined distance and then performing the peeling work while moving the device body again in the vertical direction, The peeling work can be completed over the entire surface of the mold tank.

Further, in the present invention, the ultrahigh pressure fluid is jetted from the apparatus main body toward the wall surface of the tank to peel off the coating film. Therefore, it is safe because no dust is generated and no fire is used. Further, at that time, the coating film in the non-peeling portion can be obliquely cut by inclining the jetting direction. That is, since the non-peeling portion remains smoothly, there is no fear of turning over, which is convenient for forming a coating film or coating again. Further, by advancing the peeling work while rotating the jet nozzle, the ultra-high pressure fluid is jetted in a circle on the surface of the coating film, so that it can be completely peeled and the work efficiency is excellent. It has become a thing.

The gondola is equipped with a telescopic mechanism.
If the lower part is made to contract upward, it will go around the gondola.
Can be facilitated.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described with reference to the following drawings. 1 is an explanatory view showing an embodiment, FIG. 2 is a side view of an essential part showing the embodiment, FIG. 3 is a sectional view of the same, FIG. 4 is a cutaway front view showing an example of the apparatus main body, and FIGS. It is an explanatory view shown.

In this embodiment, a gondola 2 curved along the outer surface of the spherical tank 1 is circulated in the upper hemisphere of the spherical tank 1 around a ring fence 3 on the top of the spherical tank 1 with a chain block 20. It is supported and is in contact with the tank 1 by the traveling wheels 4 driven by the traveling direction traveling motor 26. Reference numeral 8 is a remote switch of the motor 26, and 27 is a carriage on which the chain block 20 is mounted. Gondola 2
A device main body 6 is attached to the guide rails 5 arranged along, and the device main body is provided with a self-propelled mechanism. Therefore, in the peeling work, the traveling of the gondola 2 in the circulating direction is operated by the switch 8 on the passage 7 provided in the abdomen of the spherical tank 1, and the device main body 6 is operated on the gondola 2. However, the work cost can be reduced because the minimum number of people is required.

The device body 6 is a guide rail 5 of the gondola 2.
Although it is mounted by wheels 19 so as to be able to travel along it, a rack 28 installed on the gondola 2 and a pinion 29 having a control mechanism provided on the device body 6 are provided so that the device body 6 does not fall by itself. The brake mechanism is configured by meshing with and.

Next, FIG. 4 shows an example of the structure of the apparatus main body 6.
~ It demonstrates based on FIG. Ultra high pressure water is supplied from the ultra high pressure water generator 10 to the apparatus body 6. A swivel 12 is attached to the tip of the feeding ultra-high pressure hose 11, and the ultra-high pressure hose 11 is connected to the turning pipe 13 via the swivel 12. The rotating pipe 13 can be rotated at a predetermined rotation speed by the oil motor 14 via the gear 15. A branching device 16 is attached to the turning pipe 13.
Is attached, and the injection nozzle 1 has four central parts and four outer peripheral parts.
It branches into 7a and 17b. The injection nozzles are arranged in a straight shape at the central portion, and the injection nozzles 17a at the outer peripheral portion are arranged so as to be inclined toward the center. As a result, the ultra-high pressure fluid is jetted through the jet nozzle in a circle as shown in FIG.

The output of the oil motor 14 is transmitted to the wheels 19 by the infinite chain 18 and constitutes the traveling mechanism of the apparatus body 6. Therefore, the injection nozzle 17a,
Since the drive sources for rotating 17b and for traveling the apparatus body 6 can be integrated into one, the apparatus body 6 can be made compact. Further, the output transmission to the wheels 19 is configured to be performed via the clutch 9 so that the operation can be easily performed from the gondola 2. Further, in the figure, reference numeral 21 is a skirt that closes the work area, and 22 is a suction nozzle, which sucks coating film dust and the like generated in the skirt 21 through a suction port 23. Therefore, there is no fear that the working environment will deteriorate.

Further, since the coating film 24 on the wall surface of the tank is obliquely cut by the injection nozzle 17a which is inclinedly arranged on the outer peripheral portion, the coating film on the non-peeling portion is not damaged. Moreover, since the separation is performed by the water flow, the base steel plate 25 is not damaged and dust is not generated. Further, since the fluid to be sprayed need not be water, if a rust preventive agent or the like is added and sprayed, the rust preventive agent can be applied simultaneously with the peeling of the coating film.

[0016]

As described above, according to the present invention, the anticorrosion coating / coating on the outer wall of the spherical tank can be peeled easily and safely and efficiently, so that it is not necessary to form a scaffold, and the necessary minimum. Since the worker can complete the work, the work period can be shortened and the work cost can be significantly reduced. Moreover, since no dust or the like is generated, there is no problem in work hygiene and no environmental pollution is caused in the surrounding area. Further, since the work can be carried out by mixing the rust preventive agent and the like, it is very convenient that the rust preventive agent can be applied simultaneously with the peeling of the coating film.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example.

FIG. 2 is a side view of an essential part showing an embodiment.

FIG. 3 is a sectional view of an essential part showing an embodiment.

FIG. 4 is a cutaway front view showing an example of a device body.

FIG. 5 is an explanatory diagram showing an operation.

FIG. 6 is an explanatory diagram showing an operation.

[Explanation of symbols]

 1 spherical tank 2 gondola 3 ring fence 4 running wheel 5 guide rail 6 device body 7 passage 8 switch 9 clutch 10 ultra high pressure water generator 11 ultra high pressure hose 12 swivel 13 turning pipe 14 oil motor 15 gear 16 switcher 17 injection Nozzle 18 Mugen Chain 19 Wheel 20 Chain Block 21 Skirt 22 Suction Nozzle 23 Suction Port 24 Coating 25 Base Steel 26 Motor 27 Carriage 28 Rack 29 Pinion

Claims (4)

[Claims] 1. A gondola curved along the outer wall of a spherical tank is rotatably supported along the outer circumference of the spherical tank, and the apparatus main body is mounted so as to run along the gondola, and the apparatus main body has a spherical shape. A plurality of injection nozzles for injecting the ultrahigh pressure fluid toward the tank are rotatably attached, and a rotating means for rotating the injection nozzle and a feeding means for feeding the ultrahigh pressure fluid to the injection nozzle are provided. The coating film peeling device for the outer wall of the spherical tank, which is characterized in that 2. An injection nozzle is provided around a rotation center thereof.
At a predetermined angle with the injection direction toward the center of rotation.
The coating film peeling device for the outer wall of the spherical tank according to claim 1, wherein the coating film peeling device is inclined . 3. A separation work area is enclosed by surrounding the spray nozzle.
Spherical tank exterior wall coating removing apparatus according to claim 1 or 2, wherein you characterized in that fitted with closes skirt. 4. A suction port is provided in an area enclosed by a skirt.
The coating device peeling apparatus for a spherical tank outer wall according to claim 3, wherein the suction nozzle is provided .