EP3169453B1 - Mobile high-pressure cleaning device - Google Patents

Description

The invention relates to a mobile high-pressure cleaning device with a vehicle trailer, on the chassis at least two wheels are rotatably supported about a common axis of rotation for moving the high-pressure cleaning device, and with a motor and a motor-driven pump having high-pressure cleaning device for pressurizing water, the one to cleansing object can be addressed, as well as with at least one water storage tank for storing water for the high-pressure cleaner.

By means of such a high-pressure cleaning device, water can be pressurized and directed to an object to be cleaned. For this purpose, the high-pressure cleaning device has a high-pressure cleaning device with a pump which is driven by a motor.

The document WO 2011/018661 A1 discloses a mobile high-pressure cleaning device according to the preamble of claim 1. The high-pressure cleaning device can be used at different locations, especially on construction sites. If a water supply network is available at the places of use, the high-pressure cleaning device can be supplied with water from the water supply network. However, a water supply network is not available at all locations. The high-pressure cleaning device therefore has at least one water storage tank for storing water for the high-pressure cleaning device. The water storage tank may have a volume of several 100 liters, for example, a volume of 300 liters or 500 liters. The at least one water storage tank can be filled with water at a collection point and then the high pressure cleaning device can be moved to a desired location. At the place of use, the high-pressure cleaning device can be supplied with water from the at least one water storage tank.

When connecting the high-pressure cleaner to a public water supply network is often required by the network operator to ensure by appropriate measures that withdrawn from the water supply network water can not be accidentally returned to the water supply network. This is to ensure that the water supply network does not come into contact with potentially contaminated water.

Object of the present invention is to develop a mobile high-pressure cleaning device of the generic type such that the high-pressure cleaner water can be optionally provided from the at least one water storage tank or from a water supply network, with no risk that the water supply network removed water can be returned to the water supply network ,

This object is achieved in a mobile high-pressure cleaning device of the type mentioned in the present invention that the high-pressure cleaning device has a decoupling tank with at least one inlet which is connectable to a water supply network, and at least one outlet connected to the high-pressure cleaning device and at least one user operable Shut-off valve is connected to at least one water supply tank.

In the embodiment according to the invention, the water taken from the water supply network does not pass directly into a water storage tank or to the high-pressure cleaning device, but it first passes into a decoupling tank. From the decoupling tank, the water can then flow to the high-pressure cleaner. In addition, the water from the decoupling tank can also get to a water supply tank, which requires that the user opens a shut-off, which in the closed state, the connection between the decoupling tank and the water storage tank interrupts. If the obturator is open, the water storage tank can be filled via the decoupling tank.

If a water supply network is available at the place of use of the high-pressure cleaning device, the high-pressure cleaning device can be connected directly to the water supply network via the decoupling tank without the flow connection between the high-pressure cleaning device and the water supply network having to take place via a water storage tank. It is therefore not absolutely necessary for the use of the high-pressure cleaning device to fill the at least one water storage tank. A filling is only required if there is no water supply network at the site and thus the at least one water storage tank already at a collection point, for example, on a building yard, must be filled via the decoupling tank with water.

It is advantageous if a level-dependent valve is arranged at the inlet of the decoupling tank, for example a float valve. The supply of water from the water supply network to the decoupling tank via the level-dependent valve. As a result, it can be ensured in a structurally simple manner that water can only be withdrawn from the water supply network until the decoupling tank has reached a maximum fill level.

The decoupling tank advantageously forms a water tank, which decouples the high-pressure cleaning device and the at least one water storage tank from the water supply network. From the water supply network, the water first flows into the decoupling tank, wherein its inlet is located above the maximum level of the decoupling tank, so that the water located in the decoupling tank can no longer flow back to the inlet and via this to the water supply network.

It is particularly advantageous if the decoupling tank is integrated in a water storage tank. This allows a particularly compact design of the high-pressure cleaning device.

It can be provided, for example, that a water storage tank has a depression which forms the decoupling tank. The decoupling tank is thus formed in a water storage tank.

Conveniently, the decoupling tank is configured together with a water storage tank as a one-piece plastic molding.

The high-pressure cleaning device according to the invention has a vehicle trailer and can be pulled by a towing vehicle. The trailer has, as usual, a drawbar with which it can be coupled to the towing vehicle, and a chassis on which the at least one water storage tank and the high-pressure cleaner are arranged.

In a preferred embodiment of the invention, the high-pressure cleaning device to a first and a second water storage tank, which are spaced from one another on a longitudinal side of the vehicle trailer and connected to each other via a line assembly, the two water storage tanks sit on the chassis and the high-pressure cleaning device between the two Water supply tanks is positioned on the chassis. By such an arrangement, a relatively low center of gravity for the high-pressure cleaning device can be achieved, and the low center of gravity in turn results in improved handling, especially in curves and when braking and accelerating the high-pressure cleaner.

Before driving the high-pressure cleaning device to a place of use, the two water storage tanks can be filled with water. In many cases, however, this is not necessary because at the desired location a water supply network is available to which the high-pressure cleaner can be connected via the decoupling tank. If the two water storage tanks are not filled with water while driving the high pressure cleaning device, they have a relatively low weight and the position of the center of gravity of the high pressure cleaning device is essentially determined by the location of the high pressure cleaning device. Since the high-pressure cleaning device preferably occupies a position between the two water storage tanks on the chassis, the high-pressure cleaning device has a relatively low center of gravity. Should it be necessary to fill the two water storage tanks before driving the high-pressure cleaning device to a place of use, as there is no water supply network available at the desired location, then despite the considerable weight of the water storage tank a low center of gravity can be achieved because the water storage tanks sit on the chassis , Even with filled water storage tanks, the high-pressure cleaning device on an improved handling.

The use of two spaced apart Wasservorratstanks also has the advantage that the water storage tanks can be inexpensively manufactured in molding processes of plastic material, the water storage tanks can be removed from the transverse direction to the longitudinal direction of the chassis. The removal in the transverse direction makes it easier to mold receptacles for accessories and operating components of the high-pressure cleaning device in the water storage tanks, the receptacles preferably open into the facing sides of the water storage tanks.

The two water storage tanks can be produced, for example, in a rotary sintering process.

Another advantage of the arrangement of the two water storage tanks each on one longitudinal side of the vehicle trailer on the chassis and the positioning of the high-pressure cleaner and optionally other components of the high-pressure cleaning device between the two water storage tanks on the chassis is that the high-pressure cleaner and possibly other components of the high-pressure cleaning device the user and possibly also the service personnel in a simple manner for the operation of the high-pressure cleaning device and for maintenance measures are accessible. The assembly of the high pressure cleaning device is simplified.

It is particularly advantageous if the decoupling tank is integrated in the first water storage tank and connected via a supply line to the high-pressure cleaner and a lockable first connection line to the second water storage tank, and if the second water storage tank is connected via a second connecting line to the first water storage tank. If a water supply network is available at the place of use of the high-pressure cleaning device, the inlet of the decoupling tank can be connected to the water supply network via a supply hose. From the decoupling tank, the water taken from the water supply network can be provided to the high-pressure cleaning device via a supply line. A first connecting line, which connects the decoupling tank with the second water storage tank, can be shut off, so that the second water storage tank is not in fluid communication with the water supply network. However, if the two water storage tanks are to be filled with water at a collection point, the first connection line can be released, so that the water flowing into the decoupling tank can be made available to the second water storage tank via the first connection line and also to the first water storage tank via a second connection line. At the place of use, the water from the water supply tanks can reach the high-pressure cleaning device via the two connection lines and the supply line.

Since the decoupling tank via the first connecting line in fluid communication with the second water storage tank, which in turn is connected via a second connecting line to the first water storage tank, the decoupling tank and the two water storage tanks form a communicating system and the level of the decoupling tank is connected to the Level of the two water storage tanks identical, as long as the flow connection between the decoupling tank and the second water storage tank is released.

It can be provided that the space between the two water storage tanks both on the front of the high pressure cleaning device, ie in the direction of travel front, as well as on the back of the high pressure cleaning device, that is in the direction of travel behind, is directly accessible.

In an advantageous embodiment, the chassis on a frame on which sit the two water storage tanks. It can be provided, for example, that the frame of the chassis has two longitudinal beams, which are aligned parallel to the direction of travel of the high-pressure cleaning device and on each of which a water storage tank is directly seated. The two longitudinal beams can be rigidly connected to each other via transverse bars of the frame.

A particularly low center of gravity and thus a particularly good driving behavior is achieved in an advantageous embodiment of the invention in that the two water storage tanks extend over the entire length of the chassis. The large longitudinal extent of the two water storage tanks makes it possible to provide a relatively large tank volume at low altitude. Despite a considerable tank volume, a low center of gravity can be achieved.

It is advantageous if the two water storage tanks each have a front tank area and a rear tank area relative to the direction of travel, the volume of the front tank area being less than the volume of the rear tank area. The front tank area may extend from the forward end of the water storage tanks to about the common axis of rotation of the two wheels, and the rear tank area may connect to the front tank area and extend to the rear end of the water storage tanks. The provision of a smaller volume for the Front tank area makes it possible to keep the vertical load of the projecting in the direction of travel from the chassis forward drawbar even with filled water storage tanks relatively low. It can be provided, for example, that the vertical load of the drawbar is no more than 75 kg, even with filled water storage tanks.

In an advantageous embodiment, the front and the rear tank area have the same width, that is, the horizontal extent transverse to the direction of the high pressure cleaning device is the same for the two tank areas, but the vertical extent of the front tank area is less than the vertical extent of the rear tank area.

As already mentioned, the provision of two water storage tanks arranged at a distance from one another makes it possible to easily remove the water storage tanks transversely to the direction of travel. This makes it possible, in particular, to mold recesses for accessories and / or operating components into the water storage tanks, with the recesses of one water storage tank facing the other water storage tank. The recesses may be configured as depressions.

In an advantageous embodiment, at least one of the two water storage tanks, facing the other water storage tank, has at least one recess which forms a receptacle for an accessory. The recess may, for example, form a receptacle for storing a jet pipe, a spray gun, a jet pipe extension, an operating manual, a protective helmet and / or a hose.

In order to achieve a particularly high cleaning effect, it is advantageous if the pressurized, to be addressed to the object to be cleaned water can be heated. For this purpose, the high pressure cleaning device according to the invention in an advantageous embodiment, a heating unit for heating the pressurized by the pump water, wherein the heating unit between the two water storage tanks on the chassis is arranged. The heating unit can have a considerable weight, and by the positioning of the heating unit between the two water storage tanks, a low center of gravity can be achieved for the mobile high-pressure cleaning device despite the use of the heating unit, through which the driving behavior can be improved.

The heating unit is advantageously designed as a fuel-operated instantaneous water heater. Such water heaters are the expert, for example from the WO 2012/152313 A1 known.

In an advantageous embodiment of the invention, a fuel tank, a detergent tank and / or an antifreeze tank are arranged between the two water storage tanks. In the fuel tank, fuel, for example diesel fuel or light fuel oil, can be stored for a heating unit of the high-pressure cleaning device. In the detergent tank, a liquid detergent, for example, a soap solution, be stored. The cleaning agent can be added to the pumped by the pump of the high-pressure cleaner water to increase the cleaning effect. An antifreeze agent can be stored in the antifreeze tank with which the water-absorbing components of the high-pressure cleaning device, in particular the high-pressure cleaning device and high-pressure and / or inlet hoses connected thereto, can be protected from frost damage if the high-pressure cleaning device is put out of operation in the cold season. The fuel tank, the detergent tank and / or the antifreeze tank can be placed in the area between the two water storage tanks. For example, it may be provided that the fuel tank, the detergent tank and / or the antifreeze tank can be parked on a base plate, which sits directly on the chassis. The said tanks are easily accessible to the user.

In particular, it may be provided that the fuel tank, the detergent tank and / or the antifreeze tank are accessible to the user from the back of the high-pressure cleaning device.

In an advantageous embodiment of the invention, a wound on a hose reel high pressure hose and / or wound on a hose reel inlet hose are arranged between the two water storage tanks. The high-pressure hose may be connected to an outlet of the pump of the high-pressure cleaning device, so that the pressurized water can be directed onto an object via the high-pressure hose. For example, a spray lance or a spray gun can be connected to the free end of the high-pressure hose. The inlet hose may be used to connect the inlet of the decoupling tank to a water supply network. When not in use, the high-pressure hose and the inlet hose can each be wound onto a hose drum which can be positioned between the two water supply tanks.

The hose reel for the high-pressure hose and / or the hose reel for the feed hose are expediently accessible to the user from the rear side of the high-pressure cleaning device.

It is advantageous if an electrical control cabinet and / or a storage area for a tool box are arranged between the two water storage tanks. In particular electrical control components, display devices and switches of the high-pressure cleaning device can be positioned in the electrical control cabinet and, for example, also electrical fuses. The arrangement of the cabinet between the two water storage tanks is particularly advantageous if the electrical cabinet is accessible to the user from the back of the high-pressure cleaning device. This facilitates handling of the high-pressure cleaning device and also its installation and maintenance.

A tool box is conveniently positioned between the two water storage tanks and accessible to the user from the back of the high-pressure cleaning device. For this purpose, a storage area for the tool box can be provided between the two water storage tanks.

In a particularly preferred embodiment of the invention, the high pressure cleaning device at least one between a closed position and an open position movable back and forth hood, which covers a region between the two water storage tanks in the closed position and this area releases in the open position and movable on the two water storage tanks is stored.

For example, a hood in the closed position cover the high-pressure cleaner and a heating unit and release in the open position for maintenance. In the closed position, this hood preferably covers a front region of the high-pressure cleaning device between the two water supply tanks in relation to the direction of travel.

It can also be provided that a hood in the closed position covers a relative to the direction of travel rear area of the high-pressure cleaning device between the two water storage tanks and releases in the open position. This rear area can accommodate, for example, tanks for cleaning agents, antifreeze agents and / or descaling agents, as well as hose reels for a pressure hose and / or an inlet hose and an electrical control cabinet, as well as receptacles for accessories of the high-pressure cleaning device.

Preferably, the at least one hood sits in its closed position on the two water storage tanks.

The at least one hood is movably mounted on the two water storage tanks. For example, it can be provided that the at least one hood on a first and a second bearing element about a vertically oriented to the direction of travel pivot axis is pivotally mounted, wherein the first bearing element is integrally formed on the first water storage tank and the second bearing element to the second water storage tank and the two bearing elements facing each other. In such an embodiment, the two water storage tanks each have at least one bearing element. The bearing elements are aligned with each other and define a pivot axis for a rotatably mounted on the bearing elements hood, which covers a region between the two water storage tanks in its closed position.

In an advantageous embodiment of the invention, the two water storage tanks each have a vertically upwardly oriented boom, at the upper end region facing away from the chassis at least one bearing element is formed.

It is particularly advantageous if the high pressure cleaning device has a front and a rear hood, wherein the two hoods are mounted on adjacent bearing elements of the two water storage tanks. In its closed position, the front hood can cover the pump and the motor of the high-pressure cleaning device as well as a heating unit for the pressurized water of the pump and the rear hood can cover in its closed position an operating area in which, for example, a spray lance and a spray gun are arranged as well as a high-pressure hose, at the free end of the spray lance can be connected.

The bearing elements are preferably designed as a pivot pin.

Figur 1:

eine schematische Seitenansicht einer erfindungsgemäßen Hochdruckreinigungseinrichtung mit einer geöffneten vorderen Haube und einer geöffneten hinteren Haube;

Figur 2:

eine Vorderansicht der Hochdruckreinigungseinrichtung aus Figur 1 mit geöffneter vorderer Haube;

Figur 3:

eine Rückansicht der Hochdruckreinigungseinrichtung aus Figur 3, wobei die hintere Haube entfernt wurde;

Figur 4:

eine perspektivische Darstellung der Hochdruckreinigungseinrichtung aus Figur 1 mit geschlossener vorderer Haube und entfernter hinterer Haube;

Figur 5:

eine Draufsicht auf die Hochdruckreinigungseinrichtung aus Figur 1 mit geschlossener vorderer Haube und entfernter hinterer Haube;

Figur 6:

eine perspektivische Darstellung eines ersten und eines zweiten Wasservorratstanks der Hochdruckreinigungseinrichtung aus Figur 1, wobei die beiden Wasservorratstanks über eine Leitungsanordnung miteinander verbunden sind;

Figur 7:

eine schematische Seitenansicht des ersten Wasservorratstanks aus Figur 6;

Figur 8:

eine Schnittansicht des ersten Wasservorratstanks längs der Linie 8-8 aus Figur 7;

Figur 9:

eine Schnittansicht des ersten Wasservorratstanks längs der Linie 9-9 in Figur 8.

The following description of an advantageous embodiment of the invention is used in conjunction with the drawings for further explanation. Show it:

FIG. 1:

a schematic side view of a high pressure cleaning device according to the invention with an open front hood and an open rear hood;

FIG. 2:

a front view of the high pressure cleaning device FIG. 1 with open front hood;

FIG. 3:

a rear view of the high pressure cleaning device FIG. 3 with the rear hood removed;

FIG. 4:

a perspective view of the high pressure cleaning device FIG. 1 with closed front hood and distant rear hood;

FIG. 5:

a plan view of the high pressure cleaning device FIG. 1 with closed front hood and distant rear hood;

FIG. 6:

a perspective view of a first and a second water storage tank of the high pressure cleaning device FIG. 1 wherein the two water storage tanks are interconnected via a conduit arrangement;

FIG. 7:

a schematic side view of the first water storage tank FIG. 6 ;

FIG. 8:

a sectional view of the first water storage tank along the line 8-8 FIG. 7 ;

FIG. 9:

a sectional view of the first water storage tank along the line 9-9 in FIG. 8 ,

In the drawing, an advantageous embodiment of a high pressure cleaning device according to the invention is shown schematically, which is generally occupied by the reference numeral 10. The high-pressure cleaning device 10 is formed in the manner of a vehicle trailer, which has a chassis 12 with a frame 13 which is rigidly connected to a in the direction of travel 14 projecting forward from the chassis 12 drawbar 16 and are rotatably mounted on the two wheels 18, 20 about a common axis of rotation 22. The high-pressure cleaning device 10 has a drawbar 16 facing front 24, a drawbar 16 facing away from the back 26 and a first longitudinal side 28 and a second longitudinal side 30 extending in the direction of travel 14 from the back 26 to the front 24.

The high-pressure cleaning device 10 has a first water storage tank 32, which is arranged on the first longitudinal side 28 and extends from the rear side 26 over the entire length of the chassis 12 to the front side 24. In addition, the high-pressure cleaning device 10 has a second water storage tank 34, which is arranged on the second longitudinal side 30 and extends from the rear side 26 over the entire length of the chassis 12 to the front side 24. The first water storage tank 32 sits as well as the second water storage tank 34 directly on the chassis 12. For this purpose, the chassis 12 can have a first longitudinal spar in the region of the first longitudinal side 28, on which the first water storage tank 32 is seated, and in the region of the second longitudinal side 30 the chassis 12 can have a second longitudinal spar on which the second water storage tank 34 is seated directly. The longitudinal beams are not shown in the drawing to achieve a better overview.

The two water storage tanks 32, 34 each have a front tank area 36 and a rear tank area 38. The front tank area 36 extends from the front side 24 approximately to the axis of rotation 22 of the two wheels 18, 20, and the front tank area 36 is followed by the rear tank area 38, which extends to the back 26. The rear tank area 38 forms a vertically upwardly oriented boom 40, which defines the maximum height of the high-pressure cleaning device 10. At the upper end of the boom 40, a front pivot pin 42 and a rear pivot pin 44 are formed. The front pivot pins 42 of the two water storage tanks 32, 34 are facing each other, aligned The rear pivot pins 44 of the two water storage tanks 32, 34 are also facing each other, aligned with each other and define a rear pivot axis 48. At the front pivot 42 of the two water storage tanks 32, 34 is a front hood 50 pivotally and detachably mounted about the front pivot axis 46, and on the rear pivot pin 44 of the two water storage tanks 32, 34 a rear hood 52 is pivotally and releasably supported about the rear pivot axis 48. The two hoods 50, 52 can be pivoted between a closed position, in which they cover a space between the two water storage tanks 32, 34, and an open position, in which they release the space between the two water storage tanks 32, 34, back and forth. If desired, the hoods 50, 52 can be completely removed from the water storage tanks 32, 34.

The front hood 50 is in the FIGS. 1 and 2 in their open position and in the FIGS. 4 and 5 shown in its closed position. The rear hood 52 is in FIG. 1 presented in their open position and in the Figures 3 . 4 and 5 the rear hood 52 was removed.

In the region of the arm 50, a first recess 54 is formed in the first water storage tank 32, which opens into an inner wall 56 of the first water storage tank 32. The inner wall 56 of the first water storage tank 32 faces an inner wall 58 of the second water storage tank 34. For example, a protective helmet 60 can be positioned in the first recess 54.

The second water storage tank 34 has approximately at the level of the first recess 54 of the first water storage tank 32, a second recess 62 which faces the first water storage tank 32 and opens into the inner wall 58 of the second water storage tank 34. The second recess 62 forms a receptacle in which, for example, an operating manual can be positioned.

Below the second recess 62, the second water storage tank 34, a third recess 63 and a fourth recess 64, which also open into the inner wall 58 of the first water storage tank 34 and are formed in the second water storage tank 34. The third recess 63 forms a receptacle for a jet pipe, which is connected to a spray gun 68, and the fourth recess 64 forms a receptacle for an extension jet pipe 70, which can be connected to the jet pipe connected to the spray gun 68.

The recesses 62, 63 and 64 are, it has already been pointed out, formed in the water storage tanks 32, 34, wherein the Entformungsrichtung for the recesses 62, 63, 64 is perpendicular to the direction of travel 14. The two water storage tanks 32, 34 are made of a plastic material in the rotational sintering process.

In the area between the two water storage tanks 32, 34 are between the rear tank areas 38, an electrical cabinet 72, a hose reel 74 for a high-pressure hose 76, a hose reel 78 for a supply hose 80, a shelf 82 for a tool box 84 and a detergent tank 86 and an antifreeze tank 88 arranged, which are accessible to the user in a simple manner from the back 26 of the high-pressure cleaning device 10 with the rear hood 52 open. In addition, a fuel nozzle 92 is arranged for a fuel tank in this area, which is not shown in the drawing to achieve a better overview. The first water storage tank 32 carries at its rear end a descaling tank 90.

Between the front tank areas 36 of the two water storage tanks 32, 34 a high-pressure cleaner 94 with a motor 96 and a driven by this motor 96 pump 98 are arranged and a pump 98 downstream heating unit 100, which is formed in the illustrated embodiment as a fuel-driven water heater 102, one Blower 104 is assigned to supply combustion air. The high-pressure cleaning device 94, like the heating unit 100, is arranged in the region between the two water supply tanks 32, 34 on the chassis 12.

The two water storage tanks 32, 34 each form a hollow body. In the first water storage tank 32, a decoupling tank 106 is integrated in the form of a recess 108 formed in the first water storage tank 32. The decoupling tank 106 has a first inlet 110 and a second inlet 112. To the first inlet 110, a first level-dependent valve in the form of a first float valve 114 is connected. The first float valve 114 has a first float 116 which detects the level of the decoupling tank 106. To the second inlet 112, a second level-dependent valve is connected in the form of a second float valve 118, which has a second float 120, with which the level of the decoupling tank 106 can be detected. The first inlet 110 and the second inlet 112 are located at the maximum level of the decoupling tank 106. When the level of the decoupling tank 106 reaches a maximum value, the first inlet 110 and the second inlet 112 are closed by the float valves 114, 118 so that water can no longer enter the decoupling tank via the inlets 110, 112. To the first inlet 110 or optionally also to the second inlet 112, for example, the inlet hose 80 can be connected, which can be connected with its free end to a water supply network, in particular to a public water supply network.

The decoupling tank 106 has an outlet 122, which is connected via a first connecting line 124 with the second water storage tank 34. From the first connection line 124 branches off a supply line 126 which is connected to the input of the pump 98, so that via the supply line 126, a flow connection between the decoupling tank 106 and the pump 98 of the high-pressure cleaner 94 is provided.

To connect the supply line 126 to the first connection line 124, a T-piece 128 is connected in the first connection line 124. Between the T-piece 128 and the second water storage tank 34, a user-operable shut-off device is connected in the first connecting line 124, which is formed in the illustrated embodiment as a shut-off valve 130. By means of the shut-off valve 130, the flow connection between the decoupling tank 106 and the second water storage tank 34 can be interrupted, without affecting the flow connection between the decoupling tank 106 and the high-pressure cleaning device 94.

The second water supply tank 34 is in fluid communication with the first water supply tank 32 via a second connection line 132. In the second connection line 132, an outlet tap 134 is connected, which can be actuated by the user to empty if necessary, the two water storage tanks 32, 34 and the decoupling tank 106.

Trained in the form of a vehicle trailer high-pressure cleaning device 10 can be driven with the help of a towing vehicle to different locations, in particular to different construction sites. At the respective place of use, water can be pressurized by means of the high-pressure cleaning device 94 and directed via the pressure hose 76 to an object. The pressurized by the pump 98 of the high pressure cleaning device 94 water can be heated by means of the heating unit 100. If a water supply network is available at the respective place of use, water can be taken from the water supply network via the inlet hose 80, which flow into the decoupling tank 106 and can be supplied from the latter via the supply line 126 to the high-pressure cleaning device 94. The user can in this case close the stopcock 130, so that the water from the decoupling tank 106 can not get into the water storage tanks 32, 34.

To improve the cleaning result, the water can be mixed with a liquid cleaning agent, for example a soap solution, which can be stored in the detergent tank 86. In order to avoid lime deposits in the heating unit 106, the water can also be admixed with a descaling agent, which can be stored in the descaling tank 90. If the high-pressure cleaning device 10 is not operated, then in the cold season the high-pressure cleaning device 94 as well as all water-absorbing lines and hoses of the high-pressure cleaning device 10 can be filled with antifreeze, which can be stored in the antifreeze tank 88.

If no water supply network is available at the place of use of the high-pressure cleaning device 10, the two water storage tanks 32, 34 can already be filled with water at a collection point by transferring the water from the collection point via the decoupling tank 106 and the first connecting line 124 to the second water storage tank 34 and from there is supplied via the second connecting line 132 to the first water storage tank 32. The stopcock 130 is opened for this purpose. When the stopcock 130 is open, the decoupling tank 106 forms a communicating system via the first connecting line 124 and the second connecting line 132 with the two water storage tanks 32, 34, the filling level of the decoupling tank 106 coinciding with the fill level of the two water storage tanks 32, 34. At the place of use, the water can then flow out of the water storage tanks 32, 34 via the connecting lines 124, 132 and the supply line 126 to the inlet of the pump 98 of the high-pressure cleaning device 94 when the shut-off cock is open.

Claims (20)

1. Mobile high-pressure cleaning apparatus (10) with a vehicle trailer, on the chassis (12) of which at least two running wheels (18, 20) are held so as to be rotatable about a common axis of rotation (22) for moving the high-pressure cleaning apparatus (10), and with a high-pressure cleaning appliance (94) having a motor (96) and a pump (98) driven by the motor (96) for pressurizing water which can be directed at an object which is to be cleaned, and also with at least one water storage tank (32, 34) for storing water for the high-pressure cleaning appliance (94), characterized in that the high-pressure cleaning apparatus (10) has a decoupling tank (106) with at least one inlet (110, 112) which can be connected to a water supply mains, and with at least one outlet (122) which is connected to the high-pressure cleaning appliance (94) and, via a shutoff member (130) which can be actuated by the user, to at least one water storage tank (32, 34).
2. Mobile high-pressure cleaning apparatus in accordance with Claim 1, characterized in that the decoupling tank (106) is integrated in a water storage tank (32, 34).
3. Mobile high-pressure cleaning apparatus in accordance with Claim 1 or 2, characterized in that a water storage tank (32) has an indentation (108) which forms the decoupling tank (106).
4. Mobile high-pressure cleaning apparatus in accordance with any one of the preceding claims, characterized in that the high-pressure cleaning apparatus (10) has a first water storage tank (32) and a second water storage tank (34) which are arranged spaced apart from each other in each case on a long side (28, 30) of the vehicle trailer and are connected together via a line arrangement (124, 132), the two water storage tanks (32, 34) being located on the chassis (12) and the high-pressure cleaning appliance (94) being positioned between the two water storage tanks (32, 34) on the chassis (12).
5. Mobile high-pressure cleaning apparatus in accordance with Claim 4, characterized in that the decoupling tank (106) is integrated in the first water storage tank (32) and is connected via a supply line (126) to the high-pressure cleaning appliance (94) and via a first connecting line (124) which can be shut off to the second water storage tank (34), and in that the second water storage tank (34) is connected via a second connecting line (132) to the first water storage tank (32).
6. Mobile high-pressure cleaning apparatus in accordance with Claim 4 or 5, characterized in that the chassis (12) has a frame (13) on which the first water storage tank (32) and the second water storage tank (34) are located.
7. Mobile high-pressure cleaning apparatus in accordance with Claim 4, 5 or 6, characterized in that the first water storage tank (32) and the second water storage tank (34) extend over the entire length of the chassis (12).
8. Mobile high-pressure cleaning apparatus in accordance with any one of Claims 4 to 7, characterized in that at least one of the two water storage tanks (32, 34) has, facing the other water storage tank (32, 34), at least one recess (54, 62, 63, 64) which forms a receptacle for an accessory part (60, 68, 70) of the high-pressure cleaning appliance (94).
9. Mobile high-pressure cleaning apparatus in accordance with any one of Claims 4 to 8, characterized in that the high-pressure cleaning apparatus (10) has a heating unit (100) for heating the water pressurized by the pump (98), the heating unit (100) being arranged on the chassis (12) between the two water storage tanks (32, 34).
10. Mobile high-pressure cleaning apparatus in accordance with Claim 9, characterized in that the heating unit (100) is configured as a fuel-operated continuous-flow heater (102).
11. Mobile high-pressure cleaning apparatus in accordance with any one of Claims 4 to 10, characterized in that a fuel tank, a cleaning-agent tank (86) and/or an antifreeze tank (88) are arranged between the two water storage tanks (32, 34).
12. Mobile high-pressure cleaning apparatus in accordance with Claim 11, characterized in that the fuel tank, the cleaning-agent tank (86) and/or the antifreeze tank (88) are accessible to the user from the rear side (26) of the high-pressure cleaning apparatus (10).
13. Mobile high-pressure cleaning apparatus in accordance with any one of Claims 4 to 12, characterized in that a high-pressure hose (76) wound onto a hose drum (74) and/or an inlet hose (80) wound onto a hose drum (78) are arranged between the two water storage tanks (32, 34).
14. Mobile high-pressure cleaning apparatus in accordance with Claim 13, characterized in that the high-pressure hose (76) and/or the inlet hose (80) are accessible to the user from the rear side (26) of the high-pressure cleaning apparatus (10).
15. Mobile high-pressure cleaning apparatus in accordance with any one of Claims 4 to 14, characterized in that an electric switch cabinet (72) and/or a storage surface (82) for a toolbox (84) are arranged between the two water storage tanks (32, 34).
16. Mobile high-pressure cleaning apparatus in accordance with Claim 15, characterized in that the switch cabinet (72) and/or the storage surface (82) for the toolbox (84) are accessible to the user from the rear side (26) of the mobile high-pressure cleaning apparatus (10).
17. Mobile high-pressure cleaning apparatus in accordance with any one of Claims 4 to 16, characterized in that the high-pressure cleaning apparatus (10) has at least one cover (50, 52) which is movable back and forth between a closed position and an open position, which in the closed position covers a region between the two water storage tanks (32, 34) and uncovers this region in the open position, and which is mounted movably on the two water storage tanks (32, 34).
18. Mobile high-pressure cleaning apparatus in accordance with Claim 17, characterized in that the at least one cover (50, 52) is mounted to be pivotable about a pivot axis (46, 48) oriented perpendicularly to the direction of travel (14) on a first and a second bearing element, the first bearing element being formed on the first water storage tank (32) and the second bearing element being formed on the second water storage tank (34), and the two bearing elements facing each other.
19. Mobile high-pressure cleaning apparatus in accordance with Claim 18, characterized in that the two water storage tanks (32, 34) have in each case an extension arm (40) oriented vertically upwards, on the upper end region of which which is remote from the chassis (12) the bearing elements are formed.
20. Mobile high-pressure cleaning apparatus in accordance with Claim 18 or 19, characterized in that the bearing elements are configured as pivot pins (42, 44).

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