Device and method for cleaning porous road surfaces and traffic areas as surfaces to be cleaned

Abstract

The object of the invention is to create a device and a method for cleaning porous road surfaces and traffic areas as the surface to be cleaned, which efficiently and comprehensively cleans porous road surfaces and traffic areas, overcoming the shortcomings of the prior art and cleaning the traffic areas in such a way that they remain highly permeable to water and do not become a sealed traffic surface. Device for cleaning porous road surfaces (5) and traffic areas (5) as the surface to be cleaned, characterized in that at least one cavitation nozzle arrangement (2) with at least one cavitation nozzle (8) oriented towards the surface to be cleaned (5) is arranged in a cavitation frame (1) open towards the surface to be cleaned and filled with a liquid (6).wherein the cavitation frame (1) as a liquid basin comprises at least one outer wall (11) with at least one lower end face (10) facing the surface (5) to be cleaned, wherein the at least one cavitation nozzle arrangement (2) with the at least one cavitation nozzle (8) is at least partially arranged in the liquid (6) and a cavitation field (14) in the direction of the surface (5) to be cleaned can be generated above the surface (5) to be cleaned by means of a high-pressure liquid flow supplied via at least one high-pressure water supply (9) through the at least one cavitation nozzle (8), wherein the at least one cavitation nozzle arrangement (2) and / or the at least one cavitation nozzle (8) operates according to the principle of hydrodynamically induced cavitation.

Description

[0001] The invention relates to a device and a method for cleaning porous road surfaces and traffic areas as the surface to be cleaned with open-pored, water-permeable coverings.

[0002] The invention is applicable to municipal footpaths, cycle paths, side streets, roads, parking lots and other public spaces, private parking areas and garage entrances, as well as federal highways and freeways with, for example, porous asphalt surfaces. Company parking lots and internal company traffic areas are also areas of application.

[0003] In recent years, due to climate change, precipitation has frequently occurred as short, sometimes torrential downpours with often more than 50 l / m². 2Within an hour, stormwater drainage systems are often overloaded due to the ever-increasing development of towns and cities. This leads to flooding, especially in urban areas, resulting in inundated streets, flooded underpasses, and flooded basements. In addition to the damage caused by these floods, the water masses are simply washed away via paved streets, squares, sidewalks, and private driveways, and cannot replenish the groundwater level, which has been lowered by prolonged periods of drought.

[0004] Intensive efforts are currently being made to avoid discharging rainwater into the public sewer system as much as possible, but instead to divert it elsewhere, as uncontaminated as possible by environmental influences, to replenish the groundwater level.

[0005] For this reason, sidewalks, side streets, and squares, among other areas, have been increasingly paved with porous concrete blocks for years. These blocks allow a large portion of the water to pass through, thus directly entering the groundwater and relieving the burden on the public sewer system. According to FGSV 947, the guideline for permeable traffic surfaces, these concrete blocks must have a minimum permeability of k f ≥ 5×10 -5The manufacturer guarantees a water permeability of m / s in the delivered condition. This water permeability decreases over time, and according to the manufacturers, these concrete pavers become clogged after approximately 8-10 years due to road grime, plastic / rubber abrasion, and organic growth, requiring replacement. Currently, there is no effective cleaning method for open-pored pavements. High-pressure cleaners, as well as sweepers, vacuum sweepers, and high-pressure vacuum cleaners, clean the surface, but cannot sufficiently clean the pores inside the concrete pavers and adequately restore water permeability. Other cleaning methods without the use of chemical additives are also not yet known for porous paving stones.

[0006] Furthermore, the high flow pressure of pressure washers washes out the joints between the laid stones, such as geostones.

[0007] The term "porous" refers to an open-pored and water-permeable covering of surfaces as road surfacing and for traffic areas, such as corresponding open-pored and water-permeable stones or other flat or planar structural elements as road surfacing and for traffic areas or other surfaces or uses.

[0008] The object of the invention is to create a device and a method for cleaning porous road surfaces and traffic areas as the surface to be cleaned, which efficiently and comprehensively cleans porous road surfaces and traffic areas, thereby overcoming the shortcomings of the prior art and cleaning the traffic areas in such a way that they remain permeable to water and do not become a sealed traffic area.

[0009] The invention provides, as a first aspect, a device for cleaning porous road surfaces and traffic areas as the surface to be cleaned, wherein at least one cavitation nozzle arrangement with at least one cavitation nozzle directed towards the surface to be cleaned is arranged in a cavitation frame open towards the surface to be cleaned and filled with a liquid, wherein the cavitation frame as a liquid basin comprises at least one outer wall with at least one lower end face pointing towards the surface to be cleaned,wherein the at least one cavitation nozzle arrangement with the at least one cavitation nozzle is at least partially arranged in the liquid or partially surrounded by the liquid and a cavitation field can be generated in the direction of the surface to be cleaned by means of a high-pressure liquid flow supplied via at least one high-pressure water supply through the at least one cavitation nozzle above the surface to be cleaned.

[0010] Advantageously, at least one cavitation nozzle arrangement and / or at least one cavitation nozzle operates according to the principle of hydrodynamically induced cavitation. The high water pressure downstream of the nozzle creates a high vacuum, causing the water to evaporate and form bubbles. These bubbles then collapse due to the pressure increase in the liquid above the vapor pressure, resulting in bubble implosion. The space required for the formed bubbles suddenly decreases, and the water must refill this space, flowing back in an implosive manner. This creates very strong, short-term pressure surges in the water, triggering pressure waves with high pressure peaks. This process effectively dislodges dirt particles or contaminants from the pores.

[0011] This method advantageously achieves reliable, localized, and directed cavitation onto the porous road surfaces and traffic areas to be cleaned, simultaneously providing a deep cleaning effect. The original and desired water permeability can be reliably restored. Blockages or merely superficial cleaning of the porous road surfaces and traffic areas can be avoided.

[0012] As a second aspect of the invention, a method for cleaning porous road surfaces and traffic areas is provided, the cleaning being carried out by means of hydrodynamically induced cavitation, wherein a cavitation frame filled with a liquid is placed as a liquid basin on the surface to be cleaned and a cavitation field directed towards the surface to be cleaned is generated by means of at least one cavitation nozzle arranged within the cavitation frame and at least partially in the liquid or partially surrounded by the liquid and directed towards the surface to be cleaned by means of a high-pressure fluid flow through the at least one cavitation nozzle above the surface to be cleaned.A high-pressure fluid stream enters the liquid basin through the nozzles and, via at least one cavitation nozzle, creates a cavitation field above the surface to be cleaned, such as porous road surfaces and traffic areas, thus cleaning the surface. The cavitation field generated cleans the open-pored road surfaces or concrete pavers right down to the soiled pores.

[0013] Advantageously, the process uses a cavitation field to clean not only the surface of porous road surfaces and traffic areas, but also penetrates the pores and destroys the embedded dirt particles or contaminants, essentially flushing them to the surface. The smallest particles are then carried by the water flowing through the open-pored surface into the underlying gravel bed. From there, the water flows into the groundwater.

[0014] Due to the significantly lower flow pressure of cavitation compared to high-pressure cleaners, the joints, for example between geostones, are not washed out or are washed out to a much lesser extent.

[0015] Dirt and contaminants released from the road surface and pores are dispersed in the water within the cavitation frame or initially remain on the cleaned surface, such as the road surface or traffic lanes. A subsequent removal of the released dirt particles or contaminants remaining on the cleaned surface is advantageous.

[0016] The term "at least partially located in the liquid" or "at least partially surrounded by the liquid" means that at least the nozzle outlet of the cavitation nozzle is reliably or continuously surrounded by the liquid or reliably or continuously located below the liquid surface. Particularly during operation, violent movements of the liquid within the cavitation frame can occur, so it is possible that the nozzle outlet of the cavitation nozzle may be temporarily not surrounded by the liquid or may be temporarily not located in the liquid.

[0017] The liquid to be used could be water, a water-like liquid, or a water-like liquid mixture.

[0018] A cavitation nozzle is also understood to be a high-pressure nozzle or a high-pressure cavitation nozzle, although for simplicity only the term cavitation nozzle is used.

[0019] Advantageous embodiments of the invention are described in the dependent claims.

[0020] It is advantageous for at least one cavitation nozzle to be positioned vertically or at right angles, or at an angle between 80 and 89 degrees, between the surface to be cleaned and the nozzle. With more than one cavitation nozzle, these can also be positioned at different angles or positions relative to the surface being cleaned. This results in improved cleaning performance because the cavitation field impacts the porous road surfaces and traffic areas from different directions, thus enhancing the cleaning effect even on complex structures.

[0021] By arranging at least one cavitation nozzle individually and / or as a group of at least two nozzles in a rotating, oscillating (i.e., swinging or moving back and forth) and / or stationary relative to the cavitation frame, a large area within the cavitation frame can be systematically and comprehensively traversed or swept over and treated. Depending on the number of cavitation nozzles, numerous parallel cavitation fields are formed across the surface to be cleaned, creating an open-pore traffic area. This allows the entire work surface or area within the cavitation frame to be reached and cleaned quickly, thus increasing cleaning efficiency. Furthermore, the influence or interaction of neighboring cavitation nozzles can be limited or taken into account.

[0022] By distributing at least one cavitation nozzle arrangement, or at least one cavitation nozzle, or at least a group of at least two cavitation nozzles on at least one nozzle carrier or at least two nozzle carriers, the treatment of the surface to be cleaned as a working area within the cavitation frame is further facilitated, and the cleaning efficiency is further increased, since many parallel cavitation fields are also formed above the surface to be cleaned as an open-pore traffic surface. Thus, the entire working area within the cavitation frame can be reached and cleaned quickly.

[0023] By arranging the nozzle carrier in a rotating, oscillating, i.e. swinging or moving back and forth, and / or stationary or fixed relative to the cavitation frame within or on the cavitation frame, the processing of the surface to be cleaned as a working surface or working area within the cavitation frame is further facilitated.

[0024] By making the cavitation frame slid or pulled across the surface to be cleaned in at least one cleaning direction, large or contiguous areas of porous road surfaces and traffic areas can be continuously cleaned or treated.

[0025] Furthermore, the cavitation fields also change, as the oscillation of the cavitation nozzle arrangement, the nozzle carrier or the cavitation nozzles results in immediate, overlapping changes or changes of the respective cavitation fields on the surface to be cleaned.

[0026] By having a frame seal on either side of the surface to be cleaned, the cavitation frame prevents or at least minimizes water from flowing out of the frame. This reduces water consumption and water loss during processing.

[0027] By arranging the frame seal on at least one outer wall and / or on or in the area of ​​at least one lower end face facing the surface to be cleaned as a sealing edge or end faces as sealing edges, a defined transition to the surface to be cleaned is created in addition to the frame seal to reduce water consumption and water loss.

[0028] By incorporating a compressed air flow, at least a guide plate, closely spaced brushes, flexible lips, and / or rollers made of a flexible material into the frame seal, wear is reduced not only against water leakage but also on the outer wall and the lower end face facing the cleaning surface. Suitable flexible materials for the lips and / or rollers include, for example, plastic, rubber, silicone, or closed-cell foams.

[0029] The compressed air flow prevents or at least minimizes the flow of water under the cavitation frame. Simultaneously, the compressed air flow creates an air cushion, which reduces wear and tear on the cavitation frame when moving it across the traffic surface.

[0030] The compressed air flow can be directed downwards inside, outside or through an outer wall, or inside, outside or through various outer walls to the lower end face or the end faces as sealing edges, pointing towards the area of ​​the surfaces to be cleaned.

[0031] By having a rectangular base shape, with four mutually angled or right-angled outer walls, each with a lower end facing the surface to be cleaned, the cavitation frame allows for advantageous grid marking of the cleaning area. Furthermore, the frame seal can be simplified or designed more simply and optimized for minimal wear on the surface being cleaned.

[0032] By having at least one outer wall or the outer walls of the cavitation frame have the same or different frame seals perpendicular to the cleaning movement direction and / or parallel to the cleaning movement direction, the frame seal can be optimized for a better sealing effect and thus for low wear on the surface to be cleaned.

[0033] For the outer walls of the cavitation frame, which are arranged transversely in the direction of cleaning movement, rollers made of a flexible material can be arranged that adapt to small unevennesses in the floor and strongly impede the flow of water.

[0034] To minimize water losses via the lower end faces facing the surface to be cleaned, which act as sealing edges of the outer walls of the cavitation frame, the densely staggered brushes or flexible lips on the cavitation frame can preferably be arranged as cavitation frame sides for the outer walls arranged transversely or longitudinally in the direction of cleaning movement, thus further increasing the resistance against outflowing water.

[0035] The densely packed brushes or flexible lips can also be used entirely for the cavitation frame.

[0036] By having a suction device inside and / or outside the cavitation frame on or in the area of ​​the outer wall of the cavitation frame that is rearward in the direction of cleaning movement and is directed towards the surface to be cleaned, the remaining dirt particles or contaminants left on the cleaned surface can be removed during the ongoing cleaning process and / or afterwards.

[0037] The fact that the cavitation frame can be mounted on a vehicle, wherein the vehicle includes at least a water tank, a water supply line from, for example, an existing or public water supply or a usable hydrant, at least a high-pressure water supply to the at least one cavitation nozzle assembly and / or to the at least one cavitation nozzle, and at least one pump for the at least one high-pressure water supply to the at least one cavitation nozzle assembly and / or to the at least one cavitation nozzle and / or for the suction device, and includes at least a wastewater tank or a dirt collection container for the suction device, further facilitates the continuous cleaning or treatment of large or contiguous areas of porous road surfaces and traffic areas as the surface to be cleaned. The compact design of the cavitation frame is also advantageous, as the peripheral components can be transported on a vehicle.

[0038] Using a flexible water supply via a hose allows for simplified vehicle structures and direct water extraction from an existing water supply network.

[0039] By making the extraction device attachable to the vehicle, the design of the cavitation frame is simplified and the extraction device is decoupled from the cavitation frame for greater flexibility.

[0040] Alternatively or additionally, the extraction device can be attached to and / or the cavitation frame or to at least one outer wall of the cavitation frame, thus favoring a compact assembly that is easy to assemble and disassemble.

[0041] Suitable vehicles include driven, self-driving or remotely controlled vehicles, as well as towable or pushable carts and trailers, on which the device according to the invention is attached and used.

[0042] By connecting the water tank, the cavitation frame and / or the wastewater tank or the dirt collection container via a filter system and / or a circulation system, water consumption can be minimized and the released dirt particles or impurities, which would otherwise need to be extracted, can be minimized and separated or collected.

[0043] By using a suction device to remove dirt that has been dislodged from or removed from the surface to be cleaned, and any remaining dirt particles or contaminants left on the surface, all residues, dirt particles, or contaminants can be thoroughly removed, preventing immediate clogging or blockage of the pores. Contaminants that are not in particle form can also be reliably removed from the surface of porous road surfaces and traffic areas.

[0044] By operating at least one cavitation nozzle in a rotating, oscillating (i.e., swinging or moving back and forth) or stationary position, the cleaning process of the surface to be cleaned, as the working surface or working area within the cavitation frame, is facilitated. Oscillation advantageously leads to a fluctuating effect, since oscillation results in immediate, seamless changes or transitions of the respective cavitation fields generated on the surface to be cleaned.

[0045] By pushing or pulling the cavitation frame with a vehicle over the traffic area to be cleaned, the cleaning process can be simplified and also automated.

[0046] Suitable vehicles include driven, self-driving or remotely controlled vehicles, as well as towable or pushable carts and trailers, on which the inventive method and the cleaning of the surface to be cleaned can be carried out by means of hydrodynamically induced cavitation and a corresponding device can be attached.

[0047] Several embodiments of the invention are shown in the drawings and are described in more detail below. They show: Fig. 1 A schematic representation as a top view of a device for cleaning porous road surfaces and traffic areas as the surface to be cleaned with several cavitation nozzles on an oscillating, i.e. a back-and-forth swinging or moving back-and-forth nozzle carrier as a beam-shaped cavitation nozzle arrangement, Fig. 2 a schematic representation as a top view of a device for cleaning porous road surfaces and traffic areas as the area to be cleaned with several cavitation nozzles on rotating nozzle carriers as a cavitation nozzle arrangement, Fig. 3 A schematic representation as a top view of a device for cleaning porous road surfaces and traffic areas as the area to be cleaned with several cavitation nozzles on two nozzle carriers as a beam-shaped cavitation nozzle arrangement, which are fixedly arranged relative to the cavitation frame, Fig. 4 a schematic representation as a side view of a device for cleaning porous road surfaces and traffic areas as the surface to be cleaned with several cavitation nozzles on a nozzle carrier as a cavitation nozzle arrangement, wherein the cavitation frame has a frame seal in the form of rollers on parallel outer walls opposite the surface to be cleaned, Fig. 5 A schematic representation as a side view of a device for cleaning porous road surfaces and traffic areas as the surface to be cleaned, with several cavitation nozzles on an oscillating, i.e., a back-and-forth swinging or moving back-and-forth nozzle carrier as a cavitation nozzle arrangement, wherein the cavitation frame has a frame seal in the form of staggered brushes or flexible lips on parallel outer walls opposite the surface to be cleaned, Fig. 6 and Fig. 7 A schematic representation as a side view from different perspectives of a device for cleaning porous road surfaces and traffic areas as the surface to be cleaned, with several cavitation nozzles on an oscillating, i.e., a back-and-forth swinging or moving back-and-forth nozzle carrier as a cavitation nozzle arrangement, wherein the cavitation frame has a frame seal on parallel outer walls opposite the surface to be cleaned in the form of an air cushion generated by a compressed air flow and Fig. 8 A schematic representation as a side view of a vehicle with the device for cleaning porous road surfaces and traffic areas as the area to be cleaned.

[0048] The device according to the invention for cleaning porous road surfaces 5 and traffic areas 5 as the surface to be cleaned 5, as in Fig. Figure 1 shows a cavitation frame 1, open towards the surface to be cleaned and filled with a liquid 6, for example, water 6. Within the cavitation frame 1, a cavitation nozzle assembly 2 is arranged as a group on a nozzle carrier 4. The assembly consists of six cavitation nozzles 8 arranged side by side in a row, spaced apart from each other, and oriented towards the surface 5 to be cleaned. The cavitation frame 1, as a liquid basin with a rectangular base, comprises four mutually perpendicular outer walls 11, each with at least one lower end face 10 facing the surface 5 to be cleaned. The cavitation nozzle assembly 2 with the six cavitation nozzles 8 is at least partially surrounded by the liquid 6. A high-pressure liquid flow can be supplied to the cavitation nozzle 8 via a high-pressure water supply 9.By means of the high-pressure liquid flow supplied via the high-pressure water supply 9, a cavitation field 14 can be generated in the direction of the surface to be cleaned 5 by each of the six cavitation nozzles 8 above the surface to be cleaned.

[0049] The cavitation nozzle arrangement 2 with the six cavitation nozzles 8 on a nozzle carrier 4 is arranged in an oscillating manner, i.e., swinging back and forth or moving back and forth, within the cavitation frame 1. This results in a change of the cavitation fields 14, since the oscillation of the nozzle carrier 4 and thus of the cavitation nozzles 8 produces immediate, seamless changes or transitions of the respective cavitation fields 14 on the surface 5 to be cleaned.

[0050] Furthermore, within the cavitation frame 1, a suction device 3 is provided as a suction funnel across the width of the cavitation frame 1 as a liquid basin and is oriented towards the surface 5 to be cleaned, on or in the area of ​​the rear outer wall 11 of the cavitation frame 1 in a cleaning movement direction 15.

[0051] Another device according to the invention for cleaning porous road surfaces 5 and traffic areas 5 as the surface to be cleaned 5, as in Fig. Figure 2, comprising a cavitation frame 1 open towards the surface to be cleaned and filled with a liquid 6, for example, water 6. Within the cavitation frame 1 is a cavitation nozzle assembly 2 with three adjacent and spaced-apart rotating nozzle carriers 4, each comprising five cavitation nozzles 8 distributed across the respective nozzle carriers 4 and oriented towards the surface 5 to be cleaned. The cavitation frame 1, as a liquid basin with a rectangular base, also includes four mutually perpendicular outer walls 11, each with at least one lower end face 10 facing the surface 5 to be cleaned. The cavitation nozzle assembly 2, with the three adjacent and spaced-apart rotating nozzle carriers 4 and the five cavitation nozzles 8 on each side, is at least partially surrounded by the liquid 6.A high-pressure liquid flow can also be supplied to the nozzle carriers 4 and the cavitation nozzle 8 via a high-pressure water supply 9. By means of the high-pressure liquid flow supplied via the high-pressure water supply 9, a cavitation field 14 can be generated by the cavitation nozzles 8 above the surface 5 to be cleaned, in the direction of the surface 5 to be cleaned.

[0052] With regard to the cavitation fields 14, a change occurs because, when the respective nozzle carrier 4 and thus the cavitation nozzles 8 are rotated, immediate, overlapping changes or changes of the respective cavitation fields 14 are achieved on the surface 5 to be cleaned.

[0053] Furthermore, a suction device 3 is also present within the cavitation frame 1 on or in the area of ​​the rear outer wall 11 of the cavitation frame 1 in a cleaning movement direction 15 and is oriented towards the surface 5 to be cleaned.

[0054] Another device according to the invention for cleaning porous road surfaces 5 and traffic areas 5 as the surface to be cleaned 5, as in Fig. Figure 3 also comprises a cavitation frame 1, open towards the surface to be cleaned and filled with a liquid 6, for example, water 6. Within the cavitation frame 1, a cavitation nozzle arrangement 2 is arranged as a group. This arrangement consists of two parallel nozzle carriers 4 spaced apart from each other, each with six and seven cavitation nozzles 8 arranged side by side in a row and spaced apart from each other, and oriented towards the surface 5 to be cleaned. The cavitation nozzles 8 on the nozzle carriers 4 are offset from each other in the direction of cleaning movement 15. The cavitation nozzles 8 on the nozzle carriers 4, as well as the nozzle carriers 4 and thus the cavitation nozzle arrangement 2, are therefore fixed in position relative to the cavitation frame 1.The cavitation frame 1, a liquid basin with a rectangular base, also comprises four mutually perpendicular outer walls 11, each with at least one lower end face 10 facing the surface 5 to be cleaned. The cavitation nozzle assembly 2, with the cavitation nozzles 8 on the nozzle carriers 4, is at least partially surrounded by the liquid 6. A high-pressure liquid flow can be supplied to the nozzle carriers 4 and the cavitation nozzle 8 via a high-pressure water supply 9. By means of the high-pressure liquid flow supplied via the high-pressure water supply 9, a cavitation field 14 can also be generated by the six and seven cavitation nozzles 8 above the surface 5 to be cleaned, each directed towards the surface 5 to be cleaned.

[0055] Furthermore, within the cavitation frame 1, a suction device 3 is provided as a suction funnel across the width of the cavitation frame 1 as a liquid basin and is oriented towards the surface 5 to be cleaned, on or in the area of ​​the rear outer wall 11 of the cavitation frame 1 in a cleaning movement direction 15.

[0056] The respective cavitation nozzle arrangements 2, in particular the respective cavitation nozzles 8, operate according to the principle of hydrodynamically induced cavitation.

[0057] The in the Fig. The cavitation frames 1 shown in 1 to 3 have a frame seal 12 on at least one outer wall 11 and / or on or in the area of ​​at least one lower end face 10 facing the surface 5 to be cleaned [not shown].

[0058] Another device according to the invention for cleaning porous road surfaces 5 and traffic areas 5 as the surface to be cleaned 5, as in Fig. Figure 4 shows a cavitation frame 1 comparable to the design as in Fig. 1. However, in side view and perpendicular to the cleaning movement direction 15. In this respect, reference can be made to the explanations regarding Fig. 1. Contrary to the representation in Fig. 1 is a planned extraction device 3 on the rear outer wall 11 in the cleaning movement direction 15, which is not shown here.

[0059] Furthermore, as in Fig. Figure 4 shows that on the outer walls 11 of the cavitation frame 1, which lie transversely to the cleaning movement direction 15 and are parallel to each other, and in the area of ​​at least one lower end face 10 facing the surface 5 to be cleaned, a frame seal 12 is provided either towards or opposite the surface 5 to be cleaned. This frame seal 12 has, across the width of the cavitation frame 1, rollers 12c made of a flexible material that roll across the floor and simultaneously seal the cavitation frame 1 against the surface 5 to be cleaned, so that the water 6 cannot escape from the cavitation frame 1 or can only escape minimally, and in doing so, compensates for unevenness in the floor.

[0060] Another device according to the invention for cleaning porous road surfaces 5 and traffic areas 5 as the surface to be cleaned 5, as in Fig. Figure 5 shows a cavitation frame 1 with the other components comparable to the design as shown in Fig. 1 and Fig. 4 shown, but in a way that Fig. 4. Different side view rotated by 90 degrees and looking in the direction of cleaning movement 15. In this respect, reference can be made to the explanations regarding Fig. 1 and to Fig. 4 are referred to. In contrast to the representation in Fig. 1 is a planned extraction device 3 on the rear outer wall 11 in the cleaning movement direction 15, which is not shown here.

[0061] As in Fig. As shown in Figure 5, a frame seal 12 is provided on the outer walls 11 of the cavitation frame 1, which lie parallel to each other and are oriented lengthwise to the cleaning direction 15, and in the area of ​​at least one lower end face 10 facing the surface 5 to be cleaned. This frame seal 12 has densely staggered brushes 12b along the length or depth of the cavitation frame 1. These brushes slide over the cavitation frame 1 and simultaneously seal it against the surface 5 to be cleaned, preventing or minimizing the escape of water 6 from the cavitation frame 1 and compensating for unevenness in the floor. Alternatively or additionally to the densely staggered brushes 12b, flexible lips 12b, for example made of rubber or silicone, can also be provided.

[0062] Another device according to the invention for cleaning porous road surfaces 5 and traffic areas 5 as the surface to be cleaned 5, as in the Fig. 6 and Fig. Figure 7 shows a cavitation frame 1 with the other components comparable to the design as shown in Fig. 1 shown, but in a way that is Fig. 1 differing view. The Fig. 6 and Fig. Figure 7 shows a cavitation frame 1 with the cavitation nozzle arrangement 2 in a side view rotated by 90 degrees, and thus viewed perpendicular to and in the direction of cleaning movement 15. In this respect, reference can be made to the explanations regarding Fig. 1. Contrary to the representation in Fig. 1 is a planned extraction device 3 on the rear outer wall 11 in the cleaning movement direction 15, which is also not shown here.

[0063] As in the Fig. 6 and Fig. As shown in Figure 7, a frame seal 12 is provided on the outer walls 11 of the cavitation frame 1, which are parallel to each other and opposite the direction of cleaning movement 15, and in the area of ​​at least one lower end face 10 facing the surface 5 to be cleaned. This frame seal 12 has an air cushion 12a along the length, depth, or width of the cavitation frame 1. This air cushion is generated and maintained by a compressed air supply 7, which is guided through the outer walls 11 of the cavitation frame 1 to the lower end faces 10 of the outer walls 11 facing the surface 5 to be cleaned. This air cushion 12a seals the cavitation frame 1 to or from the surface 5 to be cleaned, so that the water 6 cannot escape from the cavitation frame 1, or can only escape to a minimal extent.

[0064] The area to be cleaned, 5, as shown in the Fig. 4 to 7 shown, can be composed of so-called geostones 5 with a porous structure, with joints 13 between the geostones 5.

[0065] In Fig. Figure 8 shows an exemplary vehicle 6 on which the device according to the invention for cleaning porous road surfaces 5 and traffic areas 5 is arranged as the surface 5 to be cleaned. The device according to the invention, and thus the cavitation frame 1 with the further components, as shown above depending on the type of embodiment in the Fig. Items 1 to 7 have already been described, so these are used for clarity in the Fig. 8, which are not shown individually but are nevertheless present, can therefore be pushed or pulled over the area 5 to be cleaned.

[0066] Furthermore, the vehicle includes at least one water tank 17 and at least one high-pressure water supply 9 to the respective cavitation nozzle assembly 2 and the respective cavitation nozzle 8. At least one pump 18 is also provided for the high-pressure water supply 9. Another pump 18 is provided, for example, for the suction device 3. The suction device 3 is connected to or includes at least one wastewater tank 19 or a dirt collection container 19.

[0067] The extraction device 3 is as described in the Fig. 1 to 3 are shown arranged in the cavitation frame 1. It may be advantageous or necessary for the extraction device 3 to be attached to the vehicle 16 and / or to the cavitation frame 1 or to at least one outer wall 11 of the cavitation frame 1.

[0068] Advantageously, the water tank 17, the cavitation frame 1 and / or the wastewater tank 19 or the dirt collection container 19 are connected to each other via a filter system and a circulation system, so that the water 6 in the cavitation frame 1 is regularly cleaned and, in addition, accumulating released dirt particles or impurities are immediately fed to the wastewater tank 19 or the dirt collection container 19 via the suction device 3.

[0069] The inventive method for cleaning porous road surfaces 5 and traffic areas 5, where 5 is the surface to be cleaned, provides that the cleaning is carried out by means of hydrodynamically induced cavitation. For this purpose, a cavitation frame 1 filled with a liquid 6 is placed as a liquid basin on the surface 5 to be cleaned. Within the cavitation frame 1, at least one cavitation nozzle 8 is arranged, directed towards the surface 5 to be cleaned and at least partially immersed in the liquid 6. By means of a high-pressure fluid flow through the at least one cavitation nozzle 8 above the surface 5 to be cleaned, a cavitation field 14, directed towards the surface 5 to be cleaned, is generated with the at least one cavitation nozzle 8.

[0070] At least one cavitation nozzle 8 can be operated in a rotating, oscillating, or stationary position. This allows multiple cavitation nozzles 8 to be operated side-by-side in a row in an oscillating, i.e., swiveling back and forth, position. Similarly, multiple cavitation nozzles 8 can be arranged in a circle and operated in a rotating position.

[0071] The dirt that is triggered or removed from and / or from the surface 5 to be cleaned and remains on the surface 5 to be cleaned is extracted by a suction device 3.

[0072] The cavitation frame 1 is advantageous, as shown in Fig. 8 shown, pushed or pulled over the area 5 to be cleaned by a vehicle 16. Compilation of reference symbols 1 Cavitation frame 2 cavitation nozzle arrangement 3. Extraction device, extraction funnel 4 nozzle carriers 5. Area to be cleaned: porous road surface, porous traffic area, open-pored concrete block, geostone 6 Liquid, water 7 Compressed air supply 8 cavitation nozzle 9 High-pressure water supply 10 lower forehead 11 Exterior wall 12 Frame sealing, 12a Compressed air flow, air cushion 12b brush, flexible sealing lip 12c roll 13 joint 14 Cavitation field 15 Cleaning movement direction 16 vehicles 17 Water tank 18 pump 19 Wastewater tank, dirt collection container

Claims

[1] Device for cleaning porous road surfaces (5) and traffic areas (5) as the surface to be cleaned (5), characterized by, that in a cavitation frame (1) open towards the surface to be cleaned and filled with a liquid (6) at least one cavitation nozzle arrangement (2) with at least one cavitation nozzle (8) directed towards the surface (5) to be cleaned is arranged, wherein the cavitation frame (1) as a liquid basin comprises at least one outer wall (11) with at least one lower end face (10) pointing towards the surface (5) to be cleaned, wherein the at least one cavitation nozzle arrangement (2) with the at least one cavitation nozzle (8) is at least partially arranged in the liquid (6) and a cavitation field (14) in the direction of the surface (5) to be cleaned can be generated above the surface (5) to be cleaned by means of a high-pressure liquid flow supplied via at least one high-pressure water supply (9) through the at least one cavitation nozzle (8),wherein the at least one cavitation nozzle arrangement (2) and / or the at least one cavitation nozzle (8) operates according to the principle of hydrodynamically induced cavitation. [2] Device according to claim 1, characterized by that at least one cavitation nozzle is aligned vertically or at right angles or at an angle between 89 degrees and 80 degrees between the surface to be cleaned and the nozzle to the surface to be cleaned. [3] Device according to one of the preceding claims, characterized by that the at least one cavitation nozzle (8) and / or the at least one group of at least two cavitation nozzles (8) is arranged rotating, oscillating and / or stationary or fixed relative to the cavitation frame (1). [4] Device according to any one of the preceding claims, characterized by, that the at least one cavitation nozzle arrangement (2) with the at least one cavitation nozzle (8) or the at least one cavitation nozzle (8) or the at least one group of at least two cavitation nozzles (8) are arranged distributed on at least one nozzle carrier (4) or on at least two nozzle carriers (4). [5] Device according to claim 4, wherein the nozzle carrier (4) is arranged to rotate, oscillate and / or be stationary or fixed relative to the cavitation frame (1). [6] Device according to any one of the preceding claims, characterized by , that the cavitation frame (1) can be pushed or pulled over the surface (5) to be cleaned in at least one cleaning movement direction (15). [7] Device according to any one of the preceding claims, characterized by , that the cavitation frame (1) has a frame seal (12) for the surface (5) to be cleaned. [8] Device according to claim 7, characterized by, that the frame seal (12) is arranged on the at least one outer wall (11) and / or on or in the area of ​​the at least one lower end face (10) facing the surface (5) to be cleaned. [9] Device according to one of the preceding claims 7 and 8, characterized by that the frame seal (12) comprises a compressed air flow (12a), at least a guide plate, closely spaced brushes (12b), flexible lips (12b) and / or rollers (12c) made of a flexible material. [10] Device according to any one of the preceding claims, characterized by , that the cavitation frame (1) has a square basic shape, wherein the cavitation frame (1) has four outer walls (11) that are angled to each other or aligned at right angles, each with a lower end face (10) pointing towards the surface (5) to be cleaned. [11] Device according to any one of the preceding claims, characterized by, that at least one outer wall (11) or the outer walls (11) of the cavitation frame (1) have the same or different frame seals (12) perpendicular to the cleaning movement direction (15) and / or parallel to the cleaning movement direction (15). [12] Device according to any one of the preceding claims, characterized by , that inside and / or outside the cavitation frame (1) on or in the area of ​​the outer wall (11) of the cavitation frame (1) which is located at the rear in the direction of cleaning movement (15) a suction device (3) is present and is directed towards the surface (5) to be cleaned. [13] Device according to any one of the preceding claims, characterized by, that the cavitation frame (1) is attachable to a vehicle (16), wherein the vehicle (16) comprises at least a water tank (17), a water supply line, at least a high-pressure water supply (9) to the at least one cavitation nozzle assembly (2) and / or to the at least one cavitation nozzle (8) and at least a pump (18) for the high-pressure water supply (9) to the at least one cavitation nozzle assembly and / or to the at least one cavitation nozzle (8) and / or to the suction device (3) and comprises at least one wastewater tank (19) or a dirt collection container (19) for the suction device (3). [14] Device according to any one of the preceding claims, characterized by , that the extraction device (3) can be attached to the vehicle (16) and / or to the cavitation frame (1) or to at least one outer wall (11) of the cavitation frame (1). [15] Device according to any one of the preceding claims, characterized by, that the water tank (17), the cavitation frame (1) and / or the wastewater tank (19) or the dirt collection container (19) are connected to each other via a filter system and / or a circulation system. [16] Method for cleaning porous road surfaces (5) and traffic areas (5) as the surface to be cleaned (5), characterized by , that the cleaning is carried out by means of hydrodynamically induced cavitation, wherein a cavitation frame (1) filled with a liquid (6) is placed as a liquid basin on the surface (5) to be cleaned and by means of at least one cavitation nozzle (8) arranged within the cavitation frame (1) and at least partially in the liquid (6) and directed towards the surface (5) to be cleaned, a cavitation field (14) directed towards the surface (5) is generated above the surface (5) to be cleaned by means of a high-pressure fluid flow through the at least one cavitation nozzle (8). [17] Method according to claim 16, characterized by , that dirt that is triggered or removed from and / or from the surface (5) to be cleaned and left behind on the surface (5) to be cleaned is extracted by a suction device (3). [18] Method according to one of the preceding claims 16 and 17, characterized by , that at least one cavitation nozzle (8) is operated in a rotating, oscillating or fixed position. [19] Method according to any one of the preceding claims 16 to 18, characterized by , that the cavitation frame (1) is pushed or pulled over the area (5) to be cleaned by a vehicle (16).

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