JPH0194156A - Water jet apparatus - Google Patents

Abstract

PURPOSE: To prevent the scattering of water to the circumference by connecting an exhaust cylinder to a cylindrical body enclosing both a rotary crushing edge driven by a motor and a water-jet nozzle. CONSTITUTION: A rotary crushing edge 2 is fixed to the inside wall of a cylindrical body 4, and a water-jet nozzle 3 for jetting high-pressure water through a hose 7 is provided in the vicinity of the center of the edge 2. The cylindrical body 4 is driven by a motor 1 being driven at a high speed rotating speed via a belt 5 wound around a fixed pulley 6, and an exhaust cylinder 9 is connected to the lower end of the cylindrical body 4. The paint film separated by both the water jetted from the nozzle 3 and by the edge 2 is sucked and exhausted via the exhaust cylinder 9. Thus, both the worker and the circumference thereof are not contaminated at all, and the removal of the paint film can be easily enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a water jet device, and more specifically,
Cleaning ceilings, side walls, outer walls, etc. of various buildings, etc.
This invention relates to a water jet device useful for removing old paint during renovation.

(Prior Art) In the past, the problem of asbestos toxicity has been widely discussed in society.

Asbestos is widely used as an additive in conventional spray paints and has been used in the interior of many schools, hospitals, and many other buildings.

However, in recent years, the carcinogenic properties of these asbestos have been discovered, and asbestos has begun to scatter due to the deterioration of the paint film over the years, so many buildings such as schools are required to remove the paint film. Repainting is required.

When removing these coatings, a large amount of asbestos powder is scattered into the air, so extremely strict treatment is required to prevent contamination of not only the workers but also the surrounding environment. .

(Problem to be solved by the invention) When removing asbestos coatings, in order to completely protect workers,
Dust-proof work clothes with strict airtightness are used. On the other hand, in order to prevent environmental pollution, it is required that the work area, for example, the windows and entrances of the target building, be completely isolated from the outside air.

In addition, the conventional method for removing paint films is to remove the paint film using a metal spatula, etc., but in high places such as ceilings and walls, it is necessary to set up scaffolding, and the paint film is removed. Since it is necessary to completely remove the material without leaving any residue, there are problems in that it is very hard work and the work efficiency is very low.

Therefore, there is a need for the development of an apparatus that can completely remove asbestos coatings with light labor and without contaminating the operator or the surrounding area.

(Means for Solving the Problems) The needs of the prior art described above are met by the present invention as described below.

That is, the present invention provides a rotary crushing blade driven by a motor, a water jet nozzle provided near the center of the rotary crushing blade, a cylindrical body surrounding the rotary crushing blade and the water jet nozzle, and a cylindrical body. This is a water jet device characterized by consisting of a connected exhaust pipe.

(Operation) A water jet nozzle sprays high-pressure water onto the wall surface to remove the paint film, and a rotating crushing blade is pressed against areas that are difficult to remove to forcibly remove them.

On the other hand, by strongly suctioning and exhausting from the other end of the cylindrical body, water and paint film fragments crushed by the rotary crushing blade are sucked together with moisture and surrounding air. Nothing containing this material will be scattered into the surrounding area.

(Examples) Next, the present invention will be described in more detail with reference to the accompanying drawings that schematically show preferred embodiments.

A first embodiment will be described with reference to FIGS. 1 and 2.

In this embodiment, the rotary crushing blades 21, 22 and 23 are fixed to the inner wall of the cylindrical body 4, and are driven and rotated at high speed by the motor 1 via a belt 5 hooked on a pulley 6 fixed to the cylindrical body 4. . High-pressure water is supplied to the water injection nozzle 3 from an external high-pressure water pump (not shown) via a hose 7 connected to the water injection nozzle 3. Spray some water.

At this time, when the nozzle 3 and the rotary crushing blade 2 are brought close to the ceiling of the building, most of the paint on the ceiling is peeled off by the high-pressure water jet 8. The coating film remaining without being peeled off is sufficiently crushed and peeled off by the crushing force caused by the contact of the rotary crushing blade 2. The cylindrical body 4 has its lower end connected to the exhaust pipe 9, and the exhaust cylinder 9
A flexible hose 10 is connected to the lower end, and is strongly suctioned and exhausted by a vacuum pump (not shown), so that the coating film crushed by the jet water 8 and the rotary crushing blade 2 is removed from the surrounding air as shown by the arrow X. All of the asbestos is sucked into the cylindrical body 4 by the flow, and collected in a dust collector (not shown) through the exhaust pipe 9 and flexible hose 10, so that paint film fragments containing asbestos, moisture, etc. flow out. No fear arises.

The main parts of the apparatus of the present invention have been described above, but in a more preferred embodiment, casters 11 are attached as shown in the first figure in order to improve the movement and workability of the apparatus. For example, the casters 11 make it easy to move the device, and if the height of the ceiling changes, the handle 12 provided on the casters 11 can be rotated to move the water jet device of the present invention up and down as shown by arrow Y. In addition, when this device is used on a side wall surface, it is sufficient to loosen the handle 13, rotate the water jet device as shown by the arrow Z (two-dot broken line image), and perform the same treatment as above. Of course, if the water jet device of the present invention is small-sized, such casters 11 are not necessary, and it can be made into a handy type.

In the above example, the motor 1 is configured to rotate the rotary crushing blade 2 by pressing the water jet device against the ceiling or wall as described above, for example, by 0.5 to
It is best to use one with about 10 horsepower.

Further, it is preferable that the rotary crushing blade 2 has a sharp tip so that the coating film can be peeled off well. Of course, it does not necessarily have to be sharp; for example, when removing a paint film from a relatively soft surface such as a wood surface, it is natural that a soft object such as a wire brush may be used to avoid damaging the surface. . Further, although the rotary crushing blade 2 is composed of three blades 21, 22 and 23 in the illustrated example, it is not necessary to have three blades, and it may be one, two, or more blades, and is not particularly limited.

Further, the water jet nozzle 2 can change the jet water flow 8 by changing its jet hole into various shapes.

When the rotary crushing blade 2 is fixed to the cylindrical body 4, it is preferable that the cylindrical body 4 is made of metal.
In the example shown in the second figure, since it is not necessary to fix the rotary crushing blade 2 to the cylindrical body 4, it may be made of plastic such as hard vinyl chloride resin. The diameter of this cylindrical body 4 changes depending on the size of the rotary crushing blade 2, and is generally a size that matches the rotational diameter of the rotary crushing blade 2, for example, a diameter of about 5 cm to 50 cm. Further, although not shown, the cylindrical body 4 may have a funnel shape with an enlarged upper part, and the shape of the rotary crushing blade 2 may be adapted to that shape. Of course, the cylindrical body 4 only needs to have a cylindrical shape in the region where the crushing blade 2 rotates, and the lower part thereof may have another shape.

The example in FIG. 2 is a diagram showing the main part of another embodiment. In this example, the rotary crushing blade 2 is not fixed to the cylindrical body 4 but is fixed to the rotating shaft 14 surrounding the water injection nozzle 3. Rotating axis 1
Motor 1 is connected by pulley 6 and belt 5 provided at the end of motor 4.
It can be rotated by. This example operates in the same manner as in FIGS. 1 and 2 above, except for the points mentioned above.

(Effects) According to the present invention as described above, the paint film is peeled off by spraying high-pressure water onto the wall surface using a water jet nozzle, and at the same time, the parts that are difficult to peel are forcedly peeled off by pressing against the rotary crushing blade.

On the other hand, by strongly suctioning and exhausting from the other end of the cylindrical body, water and paint film fragments crushed by the rotary crushing blade are sucked together with moisture and surrounding air. Nothing containing this material will be scattered into the surrounding area.

Therefore, according to the present invention, asbestos coatings can be easily removed from ceilings and side walls with light labor and without contaminating the operator or surroundings.

The present invention has been described above using one embodiment. The apparatus of the present invention can be used effectively not only for removing asbestos coatings, but also for cleaning the surfaces of buildings, bridges, sculptures, monuments, and other structures, stripping paint, etc.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing the entire water jet device of the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG. 1, and FIG. 3 is a water jet device of another embodiment. FIG. 2 is a cross-sectional view showing the main parts of the device. 1: Motor 2 Two-rotation crushing blade 3: Water injection nozzle 4: Cylindrical body 5: Belt 6: Pulley 7: Water supply hose 8: Water injection 9: Exhaust tube 10: Flexible hose 11: Caster 12.13: Handle 14: Rotation Axis applicant Nojo Co., Ltd. (1 other person) 5 offices αr

Claims (3)

[Claims] (1) A rotary crushing blade driven by a motor, a water jet nozzle provided near the center of the rotary crushing blade, a cylindrical body surrounding the rotary crushing blade and the water jet nozzle, and a cylindrical body connected to the cylindrical body. A water jet device characterized by comprising an exhaust pipe and an exhaust pipe. (2) The water jet device according to claim (1), wherein the rotary crushing blade is fixed to a cylindrical body, and the cylindrical body is rotated by a motor. (3) The water jet device according to claim (1), wherein the rotary crushing blade is fixed to a shaft that rotates around the water jet nozzle and is rotated by the shaft.