JPH0714383B2 - Method and apparatus for cleaning / peeling coating on walls such as spherical tanks - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning and stripping the wall surface of various structures including spherical tanks for oil, gas, chemicals, etc., or for buildings such as buildings, and an apparatus therefor.

[0002]

2. Description of the Related Art In tanks for oil, gas, chemicals, etc., it is necessary to regularly inspect welded parts, etc., so open inspection is performed. -It was necessary to peel off the lining locally and over the entire surface of the tank. In addition, it has often been necessary to clean the wall surfaces of various buildings and structures, and to repair and renew them by painting and coating.

In such a case, conventionally, a scaffold surrounding the entire building / building was set up, and a worker climbed up to the scaffold to proceed with the work. As a result, much cost and construction were required just to assemble and disassemble the scaffold. In addition, there was a risk of workers falling from the scaffold.

In addition, when the coating film is peeled off, the operator has to perform the peeling work with a nozzle such as a grinder or a sandblaster, which is inefficient and causes a lot of noise and a large amount of dust. Occasionally, environmental problems could occur not only for the hygiene of workers but also for the surrounding area.

In addition, as an external wall peeling / cleaning device,
The equipment main body is hung vertically from the rooftop of the equipment with a wire rope and washed.
・ The device for peeling work is Kokaikai 48-86657
Report, Japanese Utility Model Publication No. 50-69071, Japanese Patent Publication No. 2-457.
No. 43, Japanese Patent Application Laid-Open No. 3-156068
ing. This conventional wire rope suspension system is
The ear rope and the outer wall of the building should be perpendicular and parallel to each other.
ing. Therefore, the wire rope is used for the equipment of work machines.
Hang your body, but the wire rope is
It cannot be fixed to the outer wall stably. Especially high pressure water is used
There is also a recoil with things, and they cannot be fixed stably. this
In order to eliminate the problem
A technique for fixing is disclosed in Japanese Patent Publication No. 2-45743.
However, the negative pressure suction device must be installed in the main body of the device.
The weight is heavy, the manufacturing cost is high, and the surface is smooth.
Only the outer wall surface that easily generates negative pressure functions, and the curved outer surface
It was also difficult to use on the wall. Alternatively,
A self-propelled coating method in which the outer wall surface is self-propelled and painted with a magnet adsorbent.
JP-A-51-135942 uses a plurality of suction cups.
Wall working device for self-propelled on wall surface
No. 171 publication. However, these
The adsorption type self-propelled device can strengthen the adsorption and can be self-propelled.
Due to the mechanism that makes it so large and heavy, it becomes expensive
There is a risk that it will fall due to incomplete adsorption, which is a safety issue.
was there.

The object of the present invention is to provide a, easily and safely without the use of scaffolding, yet in a short construction period, can do cleaning and coating peeling of the outer wall surface of a building and buildings, moreover
The outer wall is greatly curved or smooth and difficult to inhale
It is an object of the present invention to provide a method and apparatus for cleaning / peeling a wall of a building such as a spherical tank or the wall of a building, which can be reliably fixed to the outer wall even on the wall .

[0006]

Means for Solving the Problems The gist of the present invention, which has solved the above problems, is as follows: 1) has a required curvature in the downward direction.
Structure or building where the outer wall is curved so that it bulges outwards
Wire rope is stretched vertically along the outer wall of the structure
Then, attach the device body for cleaning or peeling the coating film in the middle of the wire rope,
Tensile force that acts on the wire rope by tensioning the device body
The outer wall surface of the
In this state, operate the device body to clean or peel off the outer wall surface.
By moving the device body along the outer wall surface,
Method for cleaning / peeling the wall surface of a building or building such as a spherical tank characterized by cleaning the outer wall area / peeling the film 2) The device body draws a circle toward the wall A method of cleaning a wall surface of a building such as a spherical tank or the wall surface of a building described in 1) above, wherein the surface of the wall is cleaned and the coating film is peeled off by jetting an ultra-high pressure fluid 3)
So that it bulges outward with the required curvature in the vertical direction
Along the outer wall of a building or building with a curved outer wall
Wire rope is stretched and washed in the middle of the wire rope.
Alternatively , a spherical shape is provided in which a device main body for peeling off a coating film is attached, the device main body is pressed against a wall surface by the tension of the wire rope, and a traveling mechanism for traveling the device main body along the wire rope is provided. Cleaning / coating stripping device for structures such as tanks or wall surfaces of buildings 4) The device main body has a plurality of jet nozzles for ultrahigh pressure fluid rotatably supported, and the jet nozzles are rotated in a predetermined manner. The spherical tank or the like according to the above 3), characterized in that it is provided with a turning means for turning at a speed, and a feeding means for feeding an ultrahigh pressure fluid from the ultrahigh pressure fluid generator to the injection nozzle. Device for cleaning / painting stripping of a building or wall surface of a building 5) A structure such as a spherical tank or the like according to 4), characterized in that the spraying direction of the spray nozzle is inclined at a predetermined angle with respect to the wall surface. Cleaning of the wall surface of a building 6) A structure or building such as a spherical tank according to the above 4) or 5), wherein a skirt that surrounds the injection nozzle and shields the cleaning / coating stripping work area is attached to the apparatus main body. Wall surface cleaning / coating stripping device 7) The traveling mechanism of the device body shall consist of a sliding mechanism that slides the wire rope to which the device body is attached in the vertical direction and a sliding mechanism that slides in the circumferential direction. (3) A cleaning / coating stripping device 8) for a building such as a spherical tank or the wall surface of a building described in 3) to 6) above
Wire rope along the outer wall of the building or building
It is stretched in the vertical direction and washed or painted in the middle of the wire rope.
Install the device main body for film peeling and
The connection point between the loop and the main unit of the device
Install the device main body at a high position away from the outer wall surface.
Characterized by being pressed against the outer wall surface by the tension of the ear rope
It is a cleaning / coating stripping device for walls such as spherical tanks and the like.

[0007]

According to the cleaning / coating peeling method of the present invention, the main body of the apparatus for cleaning / coating the wall surface is in a state of being pressed against and fixed to the wall surface with the wire rope. Since it is only necessary to position the main body of the device at a place away from the work area, it is safe without the need for a scaffold, and it can be carried out by a minimum number of people. Where the building
Alternatively, the outer wall surface of the building has the required curvature in the vertical direction.
If it is bulging outward, pull the wire rope strongly from above and below.
When pulled, it acts on the device binding points of the upper and lower wire ropes.
The pulling force has a vertical component on the outer wall surface,
The device body is pressed against the outer wall surface, causing the device body to shake and wind.
Prevents movement due to pressure and vibration / force from work machinery,
Fixed and fixed to the outer wall. In addition, similarly set up on the main body of the device.
Even if the wire rope is tied at a high position on the
The tensile force component of the ear rope acts on the outer wall surface at a right angle,
The installation body is pressed against the outer wall surface and fixed stably. This place
, The outer wall will function even if it is a vertical plane without any curvature.
It

Further, according to the cleaning / coating stripping apparatus of the present invention, even when the apparatus main body pressed against the wall surface by the wire rope is positioned, it can be easily moved to a desired position at a desired speed by using its traveling mechanism. Can be made. Further, by cleaning the apparatus body by spraying an ultra-high pressure fluid to clean the wall surface and peeling off the coating film, and by spraying while rotating the spray nozzle, cleaning or drawing in a circle on the wall surface is possible. The coating film can be peeled off. As a result, the inside of the work area can be uniformly washed or the coating film can be peeled off.

Further, if the coating film is peeled off by jetting the ultra-high pressure fluid, dust is not generated unlike the conventional sandblasting. Moreover, by spraying the ultra-high pressure fluid obliquely against the wall surface, the coating film is cut diagonally near the boundary with the non-peeling portion, so the coating film on the non-peeling portion does not turn over and re-coating is performed. Very convenient when forming a film.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described with reference to the following drawings. 1 is an overall view showing an embodiment, FIG. 2 is an explanatory view thereof,
3 is an explanatory view showing another example of the method, FIG. 4 is a cutaway front view showing an example of the apparatus main body, and FIGS. 5 and 6 are the same explanatory views.

The wall surface cleaning / coating peeling method and apparatus according to the present invention facilitate cleaning of the convex curved surface of the spherical tank 1 for oil / gas or the like or coating peeling as shown in FIGS. It can be carried out. In this embodiment, the apparatus main body 2 for cleaning the wall surface or removing the coating film is attached to the wire rope 3 stretched along the wall surface of the spherical tank 1. Device body 2
Is pressed against the wall surface of the tank 1 by the tension of the wire rope 3, and therefore does not move by its own weight.

The upper end of the wire rope 3 is attached to a winch 4 which is rotatably supported by an annular fence 25 at the top of the tank 1 via an annular wire 24. That is, not only can the apparatus main body 2 be moved up and down at a desired speed by hoisting and unwinding the winch 4, but also the winding position of the wire rope 3 can be set on the tank wall surface by orbiting the winch 4. It can be orbited along. Therefore,
As shown in the figure, cleaning or peeling work is performed while moving vertically along the wire rope 3, then the wire rope 3 is circulated in the lateral direction, and the work is completed in the vertical direction again easily. You can complete the entire work of In the figure, 23 indicates a work completed area. here,
Reference numeral 22 denotes a work scaffold for work monitoring, which is supported by the top ring fence 25 of the tank 1 so as to be able to circulate along the wall surface.

Further, even in the case of a straight flat wall 5 such as a general building / mansion, which is not a convex curved surface like the spherical tank 1, the wall surface cleaning / coating peeling method according to the present invention is applied. be able to. In that case, as shown in FIG. 3, the support rod 6 may be projected and the wire rope 3 may be stretched via the support rod 6 so that the apparatus main body 2 can be pressed against the wall surface.

Next, an example of the apparatus main body 2 will be described with reference to FIGS. The apparatus main body 2 is equipped with a swivel 7, and in a state in which the super high pressure hose 9 for supplying the super high pressure water from the super high pressure water generator 8 and the turning pipe 10 are in communication with each other,
The turning pipe 10 is rotatably supported.

A branching device 11 is attached to the tip of the rotating pipe 10 and branches into eight injection nozzles 12a and 12b. Among them, the four injection nozzles 12a in the central portion are arranged straight along the rotation axis of the rotating pipe 10, and the four injection nozzles 12b in the outer peripheral portion are arranged in the rotating pipe 10.
Is arranged at an angle of a predetermined angle from the circumference centered at. The rotating pipe 10 is the oil motor 1
It is possible to rotate by means of 3 via a gear 14. That is, the jet nozzles 12a and 12b jet ultrahigh-pressure water in a circle as shown in FIG.

The output of the oil motor 13 is also transmitted to the wheels 16 via the infinite chain 15, and by using it in combination with the vertical movement mechanism by the winch 4, the vertical movement of the apparatus main body 2 is facilitated. . Also, the injection nozzle 1
Since the rotation of 2a and 12b and the traveling of the apparatus main body 2 can be performed by one motor 13, the apparatus can be made compact.

Reference numeral 17 denotes a skirt that surrounds the injection nozzles 12a and 12b and shields the work area. The skirt 17 is provided with a suction port 18 through which a vacuum pump sucks cleaning water, debris, and the like through a suction nozzle 19. Therefore, unlike conventional grinders and sandblasters, since dust is removed by water and suction is performed by the suction nozzle 19, the working environment does not deteriorate, and it is particularly useful when peeling off a coating film.

Further, as in this embodiment, when the ultrahigh pressure water is jetted obliquely to the wall surface to remove the coating film, the jet nozzle 12
The ultra-high pressure water jetted from b will perform the peeling while obliquely cutting the end of the non-peeling portion of the coating film 20 as shown in FIG. As a result, the coating film can be peeled off without damaging the base steel sheet 21 or damaging the coating film on the non-peeling portion. At the same time, by inclining the jetting direction of the ultra-high pressure water, the stability of the position on the wall surface of the device body 2 is improved, the reaction force received by the water pressure is suppressed to a small level, and the wire rope 3 is pressed by the tension. The apparatus main body 2 in the open state is configured so as not to be lifted.

Further, by adjusting the water pressure to be injected,
Can be used for cleaning wall surfaces and peeling paint films. In the case of peeling the coating film, 1800 kg / cm ² or more is desirable. Further, the jetting fluid does not have to be water, and it is easy to simultaneously apply the rust preventive agent.

[0020]

As described above, according to the present invention, the apparatus main body is pressed against the wall surface by utilizing the tension of the wire rope to wash the wall surface or remove the coating film.
It is possible to safely and easily clean the wall surface and remove the coating film without the need for constructing a large-scale scaffold that surrounds the building and with a minimum number of workers. Further, unlike the conventional sandblasting, when the coating film is peeled off, not only dust is not generated, but also fire is not used, so that the working environment is good and safe.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment.

FIG. 2 is an explanatory diagram showing an example.

FIG. 3 is an explanatory diagram showing another method example.

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

FIG. 5 is an explanatory diagram showing an example of a device body.

FIG. 6 is an explanatory diagram showing an example of a device body.

[Explanation of symbols]

 1 Ball Tank 2 Device Main Body 3 Wire Rope 4 Winch 5 Plane Wall 6 Strut 7 Swivel 8 Ultra High Pressure Water Generator 9 Ultra High Pressure Hose 10 Rotating Pipe 11 Brancher 12a Injection Nozzle 12b Injection Nozzle 13 Oil Motor 14 Gear 15 Infinite Chain 16 Wheels 17 Skirt 18 Suction Port 19 Suction Nozzle 20 Coating Film 21 Base Steel Plate 22 Scaffold 23 Work Completion Area 24 Ring Wire 25 Ring Fence

Claims (8)

[Claims] 1. Outer with a required curvature in the vertical direction
A building or building whose outer wall is curved so that it swells to the side
A wire rope is stretched vertically along the outer wall surface of the
Attach the device body for cleaning or peeling the coating film in the middle of the wire rope, and apply strong tension to the wire rope from above and below.
The outer wall of the pulling force that acts on the wire rope
In the state of pressure contact with the component force in the direction perpendicular to the surface,
Operate the device body to clean or peel off the outer wall surface,
The desired outer wall surface can be obtained by moving the mounting body along the outer wall surface.
A method for cleaning / peeling a wall surface of a building such as a spherical tank or the wall surface of a building, which is characterized by cleaning / peeling the area. 2. The spherical tank or the like according to claim 1, wherein the apparatus main body sprays ultrahigh pressure fluid so as to draw a circle toward the wall surface to clean the wall surface and remove the coating film. Method for cleaning and peeling coatings on buildings and walls of buildings. 3. Outer with a required curvature in the vertical direction
A building or building whose outer wall is curved so that it swells to the side
Attach a wire rope along the outer wall of the
Attach the device body for cleaning or peeling the coating film in the middle of the
The apparatus main body is provided with a traveling mechanism that presses the apparatus main body against the wall surface with the tension of the wire rope and that moves the apparatus main body along the wire rope. Cleaning / coating stripping device. 4. The apparatus main body has a plurality of ultra-high pressure fluid injection nozzles rotatably supported, and is provided with a turning means for turning the injection nozzles at a predetermined turning speed. 4. A cleaning / coating stripping device for a wall surface of a building such as a spherical tank or a wall of a building according to claim 3, further comprising a feeding means for feeding an ultrahigh pressure fluid from a fluid generator to the injection nozzle. . 5. The cleaning / coating stripping apparatus for the wall surface of a building such as a spherical tank or the wall surface of a building according to claim 4, wherein the spraying direction of the spray nozzle is inclined at a predetermined angle with respect to the wall surface. . 6. A structure such as a spherical tank according to claim 4 or 5, characterized in that a skirt surrounding the injection nozzle and shielding the cleaning / coating film peeling work area is attached to the apparatus main body. Cleaning / coating stripping device for building walls. 7. The traveling mechanism of the apparatus main body comprises a sliding mechanism for sliding a wire rope to which the apparatus main body is attached in a vertical direction and a sliding mechanism for sliding in a circumferential direction. A cleaning / coating stripping device for a building such as a spherical tank described in 3 to 6 or a wall surface of a building. 8. A work along an outer wall surface of a building or a building.
The ear rope is stretched vertically, and the middle of the wire rope is
It is possible to attach the device body for cleaning or peeling the coating film to
The attachment point between the wire rope and the device body on the device body.
Provided at a position away from the outer wall surface of the high part of the upright pillar
The device body is pressed against the outer wall by the tension of the wire rope.
A cleaning / coating stripping device for a building such as a spherical tank or the wall surface of a building characterized by the above .