FI117721B - Workmobile and method in conjunction with workmobile - Google Patents

Description

, 117721

Workmobile and method in conjunction with workmobile

The invention relates to a work carriage according to the preamble of claim 1.

The invention also relates to a method for working with a snowmobile.

Work sleds of this kind are used, for example, as painting sleds for painting large surfaces. Work sleds are also used for sandblasting and high pressure washing. The sled is moved on the surface of the object. In the case of painting sleds, a typical 10 painting method is spray painting. Large painting surfaces can be, for example, parts of ships or walls of buildings.

According to the prior art, work sleds have been open structures, whereby spray paint, vapors, sand dust and detergent mist have circulated approximately 15 freely into the environment. Particularly in painting applications, free-flowing paint has been detrimental when unwanted objects such as buildings and cars have been painted.

The dispersion of paints-related solvents into the environment has also been identified as problematic.

Prior art has been described e.g. U.S. Patent Nos. 4,856,619,440,9920; and 5,528,668.

· «® • ♦ · • * • · • ·

The object of the invention is to solve the problems of the prior art described above and, for this purpose, to provide an entirely new type of painting carriage and a method for it.

The invention is based on the fact that a controlled air circulation system is followed in the work carriage, whereby suction and blowing flows are formed between the carriage and the object being treated.

• · · 1

Typically, the sled is a space that opens to the painting site, otherwise it is closed, and suction and blowing references are implemented in the periphery of the space.

30 'More specifically, the working carriage according to the invention is characterized by it. which is the characterization of claim 1 in the section.

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The method according to the invention, in turn, is characterized by what is stated in the characterizing part of claim 5.

The invention provides considerable advantages.

5

The air flow control according to the invention reduces the release of undesirable substances such as paint, solvents, sand dust and detergents into the environment. It is also possible to reduce the amount of airborne substances that a worker breathes in comparison with current technology by injecting harmful substances into the suction nozzles 10 by means of blow nozzles.

The invention will now be described by way of example and with reference to the accompanying drawings.

Fig. 1 is a perspective view of a painting carriage 15 according to the invention.

Figure 2 is a rear perspective view of the painting carriage of Figure 1.

Figure 3 is a cross-sectional top view of a painting carriage according to the invention.

20 • 1 · t ·

As shown in Figures 1 and 2, the paint carriage 1 encloses a workspace • ·· .1 · [12] with five pages, the sixth page of which is the object to be painted (not shown). Thus, work space 12 is delimited by floor 2, sidewalls 4, rear wall 3 and roof 5. In the direction of the surface to be painted, guard rails 13 defining work space 12 are bounded by work surfaces 12, 2, 3,4 and 5. be such that paint aerosols and heavier particles and droplets will not * 1 1 pass through them. However, for safety reasons, the top surface of floor 2 must be made of paint "· 1 · permeable material, such as a wire mesh to prevent slipping. However, there should be an impermeable layer underneath the permeable * 1 floor surface to prevent paint from entering the floor. the sealing surface can be, for example, • · • 1 · 30 paper, which is changed whenever necessary.

* '* 1 * 1 ··· ..

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In the solution of Figures 1 and 2, the box-shaped suction nozzles 14 form part of the side walls 4, and the blow nozzles 6 and 7 are located outside them. The outermost blow nozzle 7 surrounds the working space 12 at the side and top. The inner blow nozzle 6 is located only at the suction nozzles 14. Thus, the suction 8 and 10 and the blowing fans 9 5 and 11 are located below the floor 2 on the switchboard 12 to get the center of gravity of the carriage as low as possible. The nozzle slots 20 of the blow nozzles 6 and 7 are formed by a plurality of successive slots in the tubular nozzles. The suction nozzles 14, in turn, are box-like and the suction nozzle 21 is uniform in each nozzle. The greatest effect of double blasting on the side walls is mainly due to the fact that the disturbing external currents 10 are mainly horizontal (winds).

The blow-off arrangement is intended to create a slight vacuum inside the workspace 12, whereby the suction nozzles 14 can be used to suck up droplets and aerosols resulting from the painting onto the downstream filters.

15

The following are suitable dimensions for the fans:

Suction fan (10 or 8) suction power 15001 / s. 20 pressure difference 1000Pa • ·

electric power 4kW

t · 1 • · * • · • · • 1 * * · 1

Blower fan (9 or 11) • * - blowing power 5001 / s • ·, ·· 1. 25 pressure difference 2000 Pa «« «

- electric power 2.2 kW

«Φ · · *** ***: ***: Both fan types are preferably non-sparking. More important to this, ···. a feature of suction blowers 8 and 10, since the vapors to be removed may be flammable.

• · · 30 The fans are equipped with frequency converters as needed, which makes it easy to control the speed and at the same time the flow.

• »· ♦ 4 117721

The filters are preferably modular, which makes it easy to replace the filter units. Filters should be placed as close to the suction nozzles as possible to minimize contamination of the exhaust pipes and fans.

5 Based on the experiments to date, good results are achieved only by combined suction and blowing in the side walls 4. The results may be further improved by imitating a similar suction / discharge arrangement also for the upper and lower edges of the workspace 12.

Figure 2 shows the structure of the back of the carriage 1.

The carriage 12 is an advantageous support for the surface to be painted, either from its top or bottom edge, for example by means of support wheels. This is necessary especially in windy conditions. When painting a sloping ship's hull, the possibility of tilting is also advantageous in order to minimize the gap between the lower edge of the carriage 15 and the hull. Alternatively, for example, an accordion-like sealing member may be tracked at the bottom. Also, side-wall blowing / suction quenching can reduce bottom leakage paint in these situations.

.. 20 There may also be independent filter units inside the workspace to purify the working air.

* · These exhaust blowers can be used to direct working air to other suction nozzles • ·· 6.

• «· *« · *

Ventilation hatches can also be tracked in the workspace 12 to provide replacement air • ·. ***. 25 workspaces.

♦ ·· I:: * · *: As shown in Figure 3, worker 15 in work space 12 applies a spray jet 16 to a target 17 to be painted. Suction nozzle 14 absorbs excess steam and blowing nozzles 6. and 7 directing the steam that may have passed the nozzle 14 back to the suction nozzle 14.

♦ · ··· 30 The strongest suction areas are outlined in area 18 and the strongest suction areas in area 19.

• * • ·· 1 • · 5 1 1 7721,:

The carriage 1 can be supported in a conventional manner by cables at the upper edge of the carriage 1, whereby the wires are fastened at their upper ends to a carriage movable transversely. The securing cables must also be adjustable lengthwise to move the carriage 1 vertically.

5

Alternatively, the carriage 1 can be mechanically secured to the crane of the crane vehicle, whereby the carriage can advantageously be moved by the handle to a desired location in three-dimensional space. For example, by hydraulics, the angle (= slope) of the carriage relative to the surface to be painted may be adjustable. The carriage position control 10 can be implemented from the carriage.

The flow can be controlled not only by suction and blow nozzles, but also by air guides located in the vicinity of these.

The suction and discharge power of the various nozzles are preferably adjustable.

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• »• · 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 # # # # # # # # # # «• · · • 1 i • · • · * 1 ·· • · · ·

Claims (8)

A removable working post (1) for treating large surfaces (17), which posture (1) comprises 5. one working space (12) provided with floor (2) pre-work (15), - which working space (12) is provided with walls (4) , 3) and a roof (5), wherein the working space opens only towards the working surface (17), characterized in that at least in the vicinity of the side walls (4) of the working space (12), suction nozzles (14) are arranged and external blowing nozzles (6). 7). Work position (1) according to claim 1, characterized in that each side (4) has two blowing nozzles (6, 7). Working position (1) according to claim 1 or 2, characterized in that the upper edge of the working position (1) also has blowing nozzles (7). Work position (1) according to claim 1, 2 or 3, characterized in that all the edges of the position (1) have bias * (6, 7) and suction nozzles (14). • · * • * · »A • · 20 • · • * · 5. Procedure for a movable posture (1), intended for the treatment of i · „. Large surfaces (17) and comprising a working space (12) for a worker (15), which working space (12) is essentially formed as one closed to its rear portion and towards • · • · "* the surface (17) which is treated with open space, characterized by the fact that at least in the vicinity of the side walls (4) of the working space (12) is a suction flow (14) arranged in the nocturnal space of this setflow flow (6.7).: 30 • ·· • · 117721 Method according to claim 5, characterized in that the blowing flow is formed by means of at least two nozzles (6, 7) on both sides (4). Method according to claim 5 or 6, characterized in that a blowing flow 5 is also formed at the upper edge of the working position (1). Method according to claim 5, 6 or 7, characterized in that the bias (6, 7) and suction flows are formed at all the edges of the scaffold (1). 10 ·· »• · · · · · · · · · ♦ · · · · · · · · · · · · · · ·· ♦ • ♦ • ♦ •« * · • · ·· ♦ • · · · · · ··· • · · · · · · · ·· ♦ • ♦ • · · ··· • · · · · · · ··· ♦ · · · • «•