JPH0825160B2 - Surface deposit remover - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing deposits on a surface for cleaning or peeling the outer surface of a building.

[0002]

2. Description of the Related Art The outer wall of a building is contaminated over the years due to dust contained in the atmosphere and rain.

Usually, after about 10 years, it is necessary to repaint. Further, it may be necessary to clean the curtain wall or the like every 2-3 years. Furthermore, there is a demand not only for cleaning the surface but also for peeling the paint itself to expose the surface.

In the case of cleaning, it is generally either water or a cleaning chemical. When washing with water, high pressure water is usually 40 to 20
A method of injecting at a flow rate of 25 to 45 liters / min from a large diameter nozzle of about ² mmφ at a pressure of 0 kg / cm ² is used.

On the other hand, in the case of peeling, methods such as sander hooking, chipper cleaner or concrete planer hooking are also known. Recently, there is also a method of using a peeling chemical.

[0006]

However, in the method of using a cleaning chemical in cleaning, although there is no problem of dust generation, a chemical containing an acid is usually used as the chemical, and therefore, it does not affect the plants on the ground. There is a risk of affecting and altering the skin. On the other hand, in peeling, methods such as sanding are based on the idea of removing contaminants along with a certain amount of the background, but the biggest problem with this type of method is that dust is generated and worker safety As well,
It warps and pollutes the surroundings. Therefore, if you work while spraying water to prevent the generation of dust,
Work efficiency is extremely poor because the blades become clogged.

In view of the above points, the method of injecting high-pressure water can solve the above problems and is convenient because water can be obtained easily and inexpensively. However, since the conventional method is merely to inject the single-hole nozzle, the nozzle pairs
Even if it is moved parallel to the quadrant, it can be cleaned and peeled off linearly, resulting in extremely poor efficiency.

Therefore, an object of the present invention is to provide an apparatus for removing deposits on the surface which is excellent in work efficiency and removal efficiency and is also excellent in safety such as no or little generation of dust.

[0009]

SUMMARY OF THE INVENTION The above-mentioned problem is to continuously revolve a nozzle head formed by opening a plurality of unit nozzles at different positions on the front surface around a rotation center deviated from its axis. Hold it in a holder and jet high-pressure / high-speed water from each unit nozzle to the target surface while making it parallel to the target surface.
It was translated, from 0.05 to 0 the diameter of each of the unit nozzles.
5 mm, water pressure supplied to each unit nozzle is 800 kg
/ Cm ² or more, and the jet flow rate from the unit nozzle is 0.1
Liter / min or more
A device according to 800~4000rpm the rotational speed of the revolution, further prior to the center of revolution of the nozzle head
The relationship of the deviation distance of the shaft center is determined by the flatness of the nozzle head.
By setting the conditions such that the loci indicated by the unit nozzles overlap each other due to the line movement , and the nozzle heads do not move in parallel , a constant distance is set so that they do not overlap each other. Solvable.

The present invention is applicable to cleaning of a building such as an outer wall to remove contaminants, peeling of a coating film such as lysine or paint, peeling of a deteriorated spray tile, peeling of concrete slag, removal of concrete leitance, keren and the like. ,
It is also applied to remove scale and rust on steel plates. Further, it can be used for deburring the inner wall of the tank.

[0011]

The first of the main points of the present invention is to dispose a nozzle head having a plurality of unit nozzles around a center of rotation that is offset from its axis.
That is to say that it revolves continuously . As a result, as shown in FIG. 6, it is possible to perform cleaning / peeling on the surface instead of overlapping the lines used in the conventional cleaning with pressurized water. The second point is that water is jetted at an ultrahigh pressure and a small amount of water. Conventionally, as described above, 40-
A large flow rate of water was jetted from a large diameter nozzle at a medium pressure of about 200 kg / cm ² . However, in this case, the effect of cleaning, especially peeling is extremely small, even though a large amount of water is used. Moreover, the work efficiency is reduced due to the use of a large amount of water, and a treatment facility for water after injection is required. If this treatment is not performed, the ground will be polluted.

On the other hand, under the apparatus of the present invention, although the amount of water is small, the nozzle diameter is small and 800 kg / cm ²
When jetting at ultra-high pressure as described above, the energy of the jet stream from one nozzle is large, so it becomes possible to cut with a sharp needle. Moreover, it has many such needles and it traverses while turning the sword tip. As shown in FIG. 6, there is less non-cutting surface left when scratched by a large number of needles, and the area surrounded by the cutting line is small, so that the area around the jet stream that was not used for cutting is reduced. The energy of the stream is used as the energy to blow off each piece. Therefore, as compared with the case of forcibly peeling with a large amount of water, the peeling effect is high and the surface of the finished surface becomes smooth as a whole.

The third point is the center of revolution of the nozzle head.
The deviation of the axial center with respect to the axis of the nozzle head, the parallel movement of the nozzle head, the loci shown by the unit nozzles wrap each other, and do not lap each other under the condition that the nozzle head is not translated. A certain distance
The conditions are set so that

For example, in the devices disclosed in Japanese Utility Model Publication No. 57-81100 and Japanese Utility Model Publication No. 58-31062 (referred to as prior art), when the nozzle heads are not moved, the loci indicated by the unit nozzles overlap each other. . However, this causes the projected energy of the wrapped portion to be larger than that of the unwrapped portion, resulting in local damage to the target surface. In addition to this point, in the examples of each publication, four unit nozzles target a certain region, but in the locus indicated by each unit nozzle, the lap center portion has a high energy density and the radial direction The energy density decreases as you go to.

On the other hand, under the device of the present invention , under the condition that the nozzle heads are not moved in parallel , they do not overlap each other, so that the loci indicated by the unit nozzles are independent as shown in FIG. That is, it is a circle that does not wrap.
Given that the total flow rate is the same as that of each publication and the same target area is covered, in the present invention, the number of unit nozzles per target area is increased and the flow rate from each unit nozzle is reduced. That is what you can do .

Therefore, in the prior art, since the energy density at the center of the four unit nozzle loci is high, it is necessary to reduce the flow rate of the high-pressure water in order to prevent the target surface from being excessively damaged. However, this lowers the peeling ability in the peripheral portion, and therefore, it is necessary to trace in a stepwise manner, for example. In contrast, the device of the present invention
Under the table, even if the flow rate from the unit nozzle is small,
High pressure water to be projected per unit time to the small area with a target area (actually, instead of being projected at the point is projected in a circle having the spread) as the energy of the
You can get a high price. Therefore, even if the flow rate is low, the peeling energy is sufficient. Since many loci of such small circles are drawn in the target area, the density of projection energy is small in the entire target area. As a result, high-pressure water can be uniformly projected onto the target surface. Therefore, it is possible to prevent streaks and mottled patterns.

Moreover, in the prior art, in order to cause the loci of the unit nozzles to overlap each other, the revolution of the nozzle head is revolved.
It is necessary to increase the displacement distance of the shaft center with respect to the center of . Moreover, the nozzle head has a comparatively large weight, which means that the speed is high, that is, the number of rotations is 800 to 4000 rpm.
Revolve around m. As a result, a mechanical load is heavy on the holder, wear is severe, and the reaction force when the operator holds the holder becomes extremely large. In this respect, the present invention does not have such a problem because the deviation distance becomes shorter in the present invention.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings.

First, reference numeral 10 for explaining the structure of the device of the present invention shown in the drawings is a holder having a substantially circular tubular shape. The holder 10 has a front portion 10A and a rear portion 10B each having a bolt 1
It is connected by 2 so that it can be separated back and forth when repairing. A handle 14 is integrally provided below the front portion 10A. In the front portion 10A, the revolutionary slave gear 1
The front and rear 6 are rotatably arranged around the axis by bearings 18A and 18B. This revolutionary slave gear 16
The liquid feed tube 20 bearing 2 has a shaft core _{C 2} the axis _{C 1,} for example 5mm deviated <br/> was the position of the holder 10
It is held via 2, 24. An attachment 26 is integrally attached to a front portion of the liquid supply pipe 20 via a thrust bearing 28, and a nozzle head 30 described in detail later is integrated with the attachment 26 with the axis C ₂ as the same axis. There is.

On the other hand, the rear end of the liquid delivery pipe 20 has a spherical seat 20a.
Is connected to a flexible shaft 32 connected to an external pump (not shown) for high-pressure water W via. Reference numeral 34 is a connecting portion pressing body. The rear portion of the flexible shaft 32 has a protective tube 3 attached to the rear portion 10B of the holder 10.
6 are fixed by a bush 38 and a fixing nut 40.

Reference numeral 42 is an air motor driven by air Ai, which constitutes a support for holding the entire apparatus by holding the handle with the right hand and the handle 14 with the left hand. This air motor 42 is
It has a switch 44 and is attached to the protective tube 36 by a mounting bracket 46. On the other hand, holder 1
A space 48 is formed between the front portion 10A and the rear portion 10B of 0, and a driving gear 50 is provided in the space 48. The driving gear 50 is rotatably held by bearings 52 and 54. . Further, the output shaft of the air motor 42 and the driving gear 50 are connected by a connecting rod 56, and the driving gear 50 meshes with the driven gear 16.

Further, the front portion of the holder 10 is protected by a flexible cover 58 made of rubber or the like for repelling dust, and the nozzle head 30 is also covered with a cover 60 for preventing rebounding dust from scattering. .

In such an apparatus, when the high-pressure water W is sent from the pump to the flexible shaft 32, the high-pressure water W is jetted from the nozzles of the nozzle head 30, which will be described later, to the target surface through the liquid delivery pipe 20. At this time, the air motor 42 is rotated, and the driven gear 16 is passed through the driving gear 50.
Is rotated. The driven gear 16 is an axis C of the holder 10.
_{Since the} liquid delivery pipe 20 is provided at a position deviated from ₁ , the nozzle head 30 is revolved around the axis C ₁ as shown in FIG. Following this revolution, the front portion of the flexible shaft 32 flexes and follows and rotates. The bearings 22 and 24 absorb the runout at this time.

Now, in the present invention, the nozzle head 3
No. 7 has a plurality of nozzles 70A, 70B, ... For example, as shown in FIGS. 2 and 3. In the example shown in the figure, a total of seven nozzles are formed in one place at the center and six at 60 degrees around the nozzle head 30.
1 at the center, the communication holes 72 extend radially from the middle,
From there, through each introduction hole 73, each nozzle 70A, 70B
... is connected to the liquid supply path.

Details of each nozzle are shown in FIG. 4. For example, a nozzle tip 70a made of diamond is sandwiched by holding pieces 70b and 70c, and the insertion hole 30 is inserted.
It is inserted in a and is held by a hexagon socket head nut 74.

The nozzle tip 70a has a small diameter D of, for example, 0.15 mm, and its tip has a diameter of 25 to 55 °.
It preferably spreads with an opening taper angle φ of 35 to 45 °.

On the other hand, in the device of the present invention, each nozzle 7
The feeding pressure to be sent to 0A, 70B, ... Is a high pressure of 800 kg / cm ² or more, preferably 1000 kg / cm ² or more. In such a state, when the nozzle head 30 is revolved around the axis C ₁ as shown in FIG. 5 and high-pressure water is jetted from each nozzle, the locus becomes as shown in FIG.
6 is moved in parallel to the target surface as shown in FIG. 6 (the loci of the nozzles 70F and 70G are not shown in the figure). Therefore, the high-pressure water acts on the entire target surface, and the deposits on the entire target surface are washed and peeled off. What is noted here is that the nozzle head 3 as shown in FIG.
The movement locus indicated by the unit nozzle when 0 is not moved is that it does not overlap. As the nozzle head, an appropriate number can be selected such as 12 holes in FIG. 7 and 20 holes in FIG. However, it is necessary to select the nozzle position so that each nozzle locus overlaps as shown in FIG. 6 while appropriately selecting the deviation amount .

The nozzle diameter D, the water supply pressure P, the jetted water amount q per nozzle, the total jetted amount Q, and the revolution speed R are preferably set as follows. The range in parentheses is the optimum range. D = 0.05 to 0.5 mm (0.1 to 0.3 mm) 0.1 liter / min (0.2) ≦ q ≦ 4.3 liter / min (3.0) 1.5 liter / min ( 2.0) ≤ Q ≤ 12 liters / min (8.0) 800 kg / cm ² (1000) ≤ P ≤ 5000 kg / cm ² (3000) 800 rpm (1000) ≤ R ≤ 4000 rpm (2500) nozzle diameters D and q and Q represents the relationship between FIG. 9 and FIG. If the nozzle diameter D is small, the jetting energy is small even if the pressure is high, the cleaning / peeling effect is small, and the nozzle tip is clogged. If it is large, not only will the total flow rate Q be large and it will not be held by human hands,
Wastewater treatment may also be required. When the pressure P is small, the cleaning and peeling effect is small, and when the pressure P is large, the effect is enhanced, but the nozzle tip is greatly worn and it is disadvantageous in terms of the strength of the device member. If the revolution speed R is small, the result is that it stays at a certain point for a long time, the background is damaged, the work efficiency is poor, and if it is too high, the strength of the eccentric holding member remains a problem.

On the other hand, when Q and P are increased, the reaction force projected on the target surface acts on the holder 10. When 7 nozzles with D = 0.2 m are provided, Q is about 5 liters and the reaction force is about 9.5 kg. The weight of the device is, for example, about 5 kg. Since the weight including the reaction force that the worker can safely hold is about 15 kg, it is important to control the total flow rate. However, when the holder 10 is attached to the machine, or when the holder itself is a part of the machine element, it is acceptable even if the reaction force is the above value or more. When such a mechanical attachment is assumed, the total flow rate is less likely to cause a problem, and the peeling effect itself is dominated by the discharge flow rate from each unit nozzle. It defines the unit flow rate.

[0030]

As described above, according to the present invention, removal of surface substances such as washing and peeling can be performed extremely efficiently and safely, without generating dust, and without requiring special wastewater treatment. The advantages of being able to

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a device of the present invention .

FIG. 2 is a sectional view of a nozzle head.

FIG. 3 is a left side view thereof.

FIG. 4 is a detailed cross-sectional view of a nozzle.

FIG. 5 is a trajectory diagram of nozzles in a state in which the nozzle head is stationary without moving in parallel .

FIG. 6 is a trajectory diagram when a nozzle of a main part is moved in parallel .

FIG. 7 is a side view of the front surface of the second nozzle head example.

FIG. 8 is a side view of the front surface of the third nozzle head example.

FIG. 9 is a correlation diagram between the nozzle diameter and the ejection flow rate per nozzle.

FIG. 10 is a correlation correlation diagram between the nozzle diameter and the total jet flow rate.

[Explanation of symbols]

10 ... Holder, 16 ... Secondary gear, 20 ... Liquid transfer pipe, 30 ...
Nozzle head, 32 ... Flexible shaft, 42 ... Air motor, 44 ... Switch, 50 ... Driving gear, 70A ...
70G ... nozzle, 70a ... nozzle tip, (the center of the revolution) C 1 _... holder axial, C 2 _... axis of the driven gear and the nozzle head, W ... high-pressure water, Ai ... air.

Claims (1)

[Claims] 1. A nozzle head formed by opening a plurality of unit nozzles at different positions on the front surface is held in a holder so as to continuously revolve around a rotation center deviated from its axis, and each unit is retained. While high-pressure / high-speed water is jetted from the nozzle onto the target surface, the parallel movement is performed in parallel with the target surface, the diameter of each unit nozzle is set to 0.05 to 0.5 mm, and the water pressure supplied to each unit nozzle is 800 kg / cm ^2. Above, and the flow rate ejected from the unit nozzle is 0.1 liter / min or more,
Moreover, the revolution speed of the nozzle head is 800 to 40.
A device for setting the rotation speed to 00 rpm, further comprising the axis centering around the center of revolution of the nozzle head.
The excursions distance relationship, by the parallel movement <br/> of the nozzle head, the trajectory indicated by a unit nozzle wraps to each other, moreover, under conditions not translate let the nozzle head, so as not to lap one another An apparatus for removing deposits on a surface, characterized in that the conditions are set so that the distance is constant .