DE102007049030A1 - Movable machine for cleaning street surfaces has a longitudinal center axis, a front end fitted at the front along the longitudinal center axis in the machine's direction of movement and a rear opposite this direction - Google Patents

Abstract

A first rotating broom (10A,10B) for a suction device (16) can be positioned near to a street's surface. A first spraying device (15) for fresh water fits in front of the suction device in a direction of movement and links to a water tank (12). Fitted in a direction of movement in front of the first spraying device, an applicator device (20A,20B) for releasing cleaning agents extends over a section vertical to a longitudinal center axis (1a).

Description

The The present invention relates to a mobile machine for cleaning a road surface with at least one, preferably several rotatable about horizontally or vertically arranged axes Brooms and sprayers for water, against the road surface are directed and in the direction of travel the machine are arranged in front of the broom.

The DE 4335117 A1 describes a vehicle for the removal of traces of oil on roads, in which a premixed aqueous cleaning solution is sprayed onto the road surface and is then taken up by a suction device with the aid of rotating brooms. From the suction device, the absorbed cleaning solution is conducted into the tank, from which, with the separation of oil through a capillary system, the aqueous cleaning solution for renewed spraying onto the road surface is removed.

That from the DE 4335117 A1 known method has, after the treatment of a road surface with an aqueous solution of a cleaning agent on no rinsing step, with the still superficially bound cleaning agent could be removed from the road surface. It has been found in preliminary tests for the present invention that residues of the cleaning agent remain superficially bound on the road surface. These residuals of the cleaning agent on the road surface may emulsify any residual contaminant, such as oil, so as to prevent easy visual control of residual oil by the detergent residue.

Also Cleaning process, which is an aqueous mixture of a cleaning agent spraying on a road surface with pressure, in order to solve impurities are in connection with the simultaneous suction of the applied cleaning solution to the disadvantage that detergent superficially remains bound on the road surface and emulsified, for example, oily residues and thus made invisible. A disadvantage of the application of aqueous cleaning solution on a road surface, especially with porous surfaces, for example porous asphalt is that an uncontrollable large proportion of impurities due to the pressure of Application of the cleaning solution is pressed into the pores and therefore no longer in a subsequent extraction is detected.

task Therefore, it is a mobile cleaning machine of this invention to provide for road surfaces, which avoids the disadvantages of known devices and in particular with little construction effort from a conventional street sweeper can be produced.

The Invention solves the above problem by providing A mobile machine according to claim 1, which is preferably a self-propelled sweeper, especially with motorway approval is, with a front end arranged in the direction of travel and a opposite rear, for cleaning road surfaces with at least one above the road surface positionable broom and a spraying device for Water by means of a pipe with a storage tank for water connected is. The spraying device for water can be placed immediately in front of a broom and against the road surface Be directed to fresh water immediately before the broom on the road surface apply. For example, in relation to a conventional self-propelled Sweeper can, before each broom, preferably at least in the discharge tangentially a suction mouth is assigned, spraying be arranged for fresh water.

In immediate neighborhood of the broom, which is rotationally symmetric about its axis is and about an approximately horizontally or vertically arranged axis means a motor is rotatable, is preferably a suction device arranged by means of which directly from the road surface and / or tangentially in the direction of rotation in front of or next to the broom Impurities and aqueous components added become. Preferably, such a broom is in the form of a cup brush (Gutter or Gossenbesen) on a gutter facing Side and / or pivotally arranged at the front end of the machine, particularly preferably alternatively or additionally in the form a about a horizontal axis rotating roller broom, the extends over the driving width of the machine, z. B. roughly in the middle of the machine, and each has an associated one Suction on, which is also referred to as a suction mouth. The Machine always has a broom downstream in the direction of travel Suction on and preferably is the spray Fresh water in the direction of travel before the suction and after arranged a broom; between this spraying device and the aspirator is another broom optional, however not necessary to arrange. The broom can be in the direction of travel upstream additional optional sprayers allocated for fresh water or detergent solution be.

According to the invention, one or more application devices for detergent solution are provided, in each case arranged in the direction of travel of the machine in front of a broom and this downstream in the direction of travel suction device. OF INVENTION According to the preferred direction in the direction of travel of the machine, ie from the front end to the rear, first an application device for detergent solution, then a broom, this followed by a spraying device for fresh water and finally arranged a suction device. With this arrangement, when moving the machine in the direction of travel, first detergent solution can be applied by the applicator on a road surface and distributed and / or incorporated by the subsequently arranged broom. The spraying device for fresh water arranged between the broom and the suction device serves to apply fresh water for diluting and increasing the volume of detergent solution applied and impurities distributed therein. Subsequent to incorporation by means of the broom, therefore, the aspirator picks up the detergent solution with impurities dispersed therein after rinsing the road surface with fresh water from the sprayer. The processing of a portion of the road surface to be cleaned by the front end to the rear successively arranged application device for detergent solution, the first broom, the spray device for fresh water and the suction device is achieved in that they are spaced apart substantially over the same section perpendicular to the longitudinal center axis of the Machine extend.

optional can the first broom in his direction, z. Tangential, be associated with an additional suction, with the sweepings can be recorded.

The Extraction device extends at least over one Section of the working width of the machine, d. H. over one Section of the machine perpendicular to the direction of travel, at a Vehicle can also be referred to as the longitudinal center axis, about the application device for detergent solution extends. Also the spraying device, in front of the suction device is arranged extends at least over a section the working width of the machine over which the applicator device extends for detergent solution, so that the width of the road in which the detergent solution is applied, following the action of the broom sprayed with fresh water and then sucked off. For the purposes of this invention, the term refers Working width to the maximum extent of at least part of the Machine perpendicular to its longitudinal central axis.

In preferred embodiment is the applicator for detergent solution at the front end of the machine arranged, for example, in front of the front axle, and is there also referred to as front spray bar. Preferably Such a front spray bar sections with detergent solution actable and / or divisible. The order device for Detergent solution, for example, an approximately horizontal arranged conduit with spaced-apart spray nozzles connected thereto, is connected to a supply line to a water tank, where this supply a concentrate line for detergent concentrate over a metering pump arranged in the supply line is connected, which is driven by a hydraulic motor arranged in the supply line is. The concentrate line is with a storage tank connectable to detergent concentrate.

Especially Preferably, the machine according to the invention the spraying device for fresh water and the In the direction of travel subsequently arranged suction in the form one at the stern just above the road surface positionable suction on upstream in the direction of travel a spraying device for water is arranged, which is connected to the fresh water tank. Such a rear suction Optionally with an additional rotatable broom be provided, but preferably the Heckabsaugung only with one upstream spraying device for fresh water provided, with rear suction and upstream sprayer for fresh water preferably over the entire Ride or working width of the machine extend, or with two parallel sprayers for fresh water. It is preferred that Heckabsaugung and one of these associated Spraying device for fresh water each vertical to the longitudinal center axis of the machine over the same Section with negative pressure or fresh water can be acted upon, over the application device for detergent solution extends.

additionally to the one sprayer for water can a second, z. B. parallel and transverse to the longitudinal central axis arranged spraying device for water in the direction of travel be positioned in front of the rear suction, the outlet nozzles preferably with fresh water under high pressure of z. B. 50 to 120 bar can be acted upon.

The Extraction devices are each through lines with a vacuum source and a collection tank connected in the extracted liquid is collected.

The inventive use of a metering pump between the concentrate line for cleaning agent concentrate and the supply line to the application device for detergent solution is particularly advantageous because of the drive of this metering pump by the arranged in the supply line to the applicator hydraulic motor, because thereby the regular dosage of detergent concentrate from the reservoir unab dependent on pressure within the supply line in the supply line to the application device for detergent solution is possible. Upstream of the hydraulic motor, the supply line to the detergent solution application device is connected by a water line to a water tank, which may for example be a common water tank to which the spray devices are also connected by lines.

In Preliminary tests for the dosage of cleaning agent concentrate in a connected to a water tank supply line to the applicator for detergent solution has been shown that Pressure fluctuations in the supply line, caused for example by changes the filling level of the water tank and changes the removal of water by the spray applied with water, too strong fluctuations in the addition of detergent concentrate leads, if an adjustable, electrically driven Metering pump is arranged in the concentrate line. On the other hand, the According to the invention provided metering in the Concentrate line, which is driven by a hydraulic motor, the in the supply line to the application device for detergent solution is arranged, with which also the line of a water tank connected is independent of pressure fluctuations in the water pipes the cleaning machine a continuous, proportionally constant Dosing of detergent concentrate to the water, which in the supply line to the application device for detergent solution flows.

alternative can be used by one in the supply line for fresh water Sprayer arranged hydraulic motor driven metering pump for detergent concentrate, this from the concentrate line into the supply line, depending on the volume flow the fresh water in the supply line to be electrically controlled. For this embodiment is a flow meter arranged in the supply line, that depends on the fresh water flow generates an electrical signal with which controls the metering pump becomes. Such a metering pump is set up, depending from the signal from the flowmeter detergent concentrate to promote in the supply line to the sprayer. Therefore, this embodiment requires a flow meter in the supply line for fresh water and one from the electrical Signal of the flowmeter controlled metering pump, so that this metering pump is preferably driven electrically controllable is, for. B. is driven by a signal-controlled electric motor.

It is preferred that in the supply line to the applicator for Detergent solution passing through a line with a Water tank is connected, pressure also against the applicator is constructed, for example by a pump in the line between the water tank and the applicator, preferably by a Pump in the line between the water tank and the hydraulic motor, coupled with the detergent concentrate dosing pump is.

The inventive arrangement of an application device for detergent solution allows a pre-selectable dosage of the detergent concentrate to the water, the detergent solution applicator is fed without being in a water tank, for example a common water tank, to which also the sprayers the line are connected, detergent should be added. Accordingly, a conventional street sweeper be converted to a machine according to the invention, by the application device for detergent solution is grown, wherein for charging this application device for detergent solution, only one wire on to connect an existing water tank, to arrange in this supply line of the hydraulic motor and one of the Hydromotor driven metering pump by means of a line with the Reservoir for detergent concentrate to connect, and a connection between the end of the discharge the metering pump and the supply line to the applicator consists. The invention therefore avoids a separate one Storage tank for ready-mixed detergent solution provide, or even a central water tank as a reservoir to be used alone for detergent solution, so that no fresh water tank would be available. Corresponding allows the machine according to the invention the Application of detergent solution by the applicator in the direction of travel before a device for absorption, and thus during a movement of the machine an order of the detergent solution at a time interval before the absorption, so independent from the amount of detergent solution applied this can act on the road surface before she is sucked off.

Since the machine according to the invention has spraying devices which are connected to a water tank and can apply fresh water from the water tank to the road surface after detergent solution has been applied and applied by means of a broom, on the one hand the fresh water sprayed on following the action of the cleaning agent solution increases Removal of detergent solution and impurities contained therein, for example, emulsified oil causes. In this way, residues of detergent and contaminant remaining on a cleaned road surface are compared reduced with procedures that do not require separate application of fresh water to the road surface.

on the other hand It gets through the application of fresh water through sprayers in the direction of travel after the application device for detergent solution, d. H. after a contact time of the cleaning agent on the road surface possible, the concentration the detergent solution to detergent concentrate increase, at the same time the applied volume Detergent solution per unit area of road surface is reducible. The reason for the opportunity to increase the concentration of the detergent solution, and optionally additionally to reduce their applied volume, lies in the fact that the subsequent flushing through Fresh water flowing through the spray nozzles of the sprayer is applied to the road surface, one Dilution of the applied detergent solution and emulsified impurities, so that an effective Washing of the road surface following the action of the detergent solution can take place.

Especially is preferred, the inventive machine with a spraying device for fresh water at the rear to be connected by pipes connected to a water tank is, and in the direction of travel behind arranged suction, with or without rotatable brooms in front of the suction device. To this This can be achieved by spraying fresh water a second wash of the road surface reach with subsequent suction. This will be particularly effective residues of detergent solution and in it emulsified impurities from the road surface washed and removed so that levels of impurities, such as oil, that is not completely emulsified by the detergent and then not sucked off, not even from residues the emulsifier is emulsified, but rather in the on adhering to the road surface after suction Fresh water is visible, for. B. as an oil film.

A such rinse to remove detergent following the suction is the first time by the inventive Machine realized and thus allows at least for oily impurities a simple optical control of the achieved cleaning effect, d. H. remaining oily impurities become visible and are no longer covered by residues of the cleaning agent.

The cleaning machine according to the invention will now be described in more detail with reference to the figure, in which the machine shown schematically 1 exemplified by a two-axle automobile with a longitudinal center axis 1a , a front end arranged forward in the direction of travel 2 and a rear facing away from the direction of travel 3 ,

A first broom 10A can be in the form of a cup brush or in the form of a roller brush 10B be positioned above the road surface and rotatable about an axis on the machine 1 be arranged. On the first broom 10A . 10B Optionally one spraying device each 11A . 11B arranged upstream in the direction of travel, with a water tank 12 for fresh water is connected by lines. In the pipe from the water tank 12 to a first spraying device 11A . 11B is preferably a fresh water pump 13 arranged to overcome the resistance of the pipes and provide adequate water supply to the first sprayers 11A . 11B to ensure with fresh water.

According to the preferred embodiment, in the figure, the suction device 16 in the form of a rear exhaust at the rear 3 the machine 1 directed directed against the road surface and upstream in the direction of travel, the spray 15 for fresh water in the form of a Hecksprühleiste, with the Hecksprühleiste and Heckabsaugung preferably over the entire working width of the machine 1 extend as shown schematically.

The rear suction 16 may be formed in sections or sections act on negative pressure, which schematically with the sections 16A and 16B is shown.

The rear spray bar 15 may be formed in sections or sections of fresh water, which is schematically with the sections 15A and 15B is shown, which preferably the subsequently arranged in the direction of travel section 16A respectively. 16B overlap perpendicular to the longitudinal central axis to spray in the same section of fresh water and to be able to vacuum the road.

The first broom 10A . 10B Optionally each can be a suction device 14 be assigned, for example in the manner of a conventional suction mouth. The suction device 14 is in the direction of travel behind a first broom 10A . 10B arranged, preferably in the direction of ejection of the first broom 10A . 10B , For example, tangentially in front of a rotating around an approximately vertically arranged axis broom, or at the end of an approximately horizontally rotating roller brush, the closer to the rear 3 is arranged.

For an intensive training of aufgetra genen detergent solution can in the direction of travel after the application device for detergent solution 20A, z. B. in the form of an applicator 20B extending over a portion of the working width of the machine perpendicular to its longitudinal central axis 1a extends, a second broom 26 be arranged. Such a second broom 26 preferably extends over the portion perpendicular to the longitudinal central axis 1a that the order facility 20B occupies.

Optionally, another second broom (not shown) at the rear 3 between the rear spray bar 15 and the rear suction 16 be arranged, preferably with the same working width, as the Heckabsaugung 16 so that the second broom the effect of the rear suction 16 strengthened.

The application device according to the invention 20A . 20B for detergent solution is respectively in the direction of travel of a first spraying device 15 arranged upstream. As shown schematically, the applicator 20A for detergent solution at the front end 2 the machine 1 be arranged, for example, in front of the front axle and particularly preferably be designed so that the entire working width of the machine 1 is sprayable.

A Application device for detergent solution can have valves with which a partial admission is adjustable with detergent solution, for example to only a section of the working width on the road surface to spray with detergent solution.

According to the invention, it is provided that the application device 20A . 20B for detergent solution from a water tank 12 for fresh water is applied, wherein in the supply line 21 a hydraulic engine 22 is arranged, of fresh water coming out of the water tank 12 in the supply line 21 flows, is driven. With the hydraulic motor 22 coupled is one from the hydraulic motor 22 driven metering pump 23 that by means of a line 24 for detergent concentrate a reservoir 25 for detergent concentrate with the supply line 21 combines. When driving the hydraulic motor 22 by fresh water coming from the water tank 12 through the supply line 21 to the order device 20A . 20B for detergent solution flows, drives the hydraulic motor 22 the dosing pump 23 on, over the line 24 for detergent concentrate, the detergent concentrate from its reservoir 25 proportional to the volume flow of fresh water from the water tank 12 in the supply line 21 dosed.

The hydraulic motor 22 can be one of the flow of fresh water in the supply line 21 acted and driven piston, which reciprocates in a cylinder between two end positions, wherein the mutual application of two opposite end portions of the piston is controlled by valves. Such, by the flow of water within a cylinder displaceable piston can be connected directly by a push rod with a metering piston which is displaceable within a metering cylinder and the metering pump 23 realized, wherein the metering cylinder has at least one inlet opening, to which the concentrate line 24 connected, and an outlet, from the pumped detergent concentrate into the supply line 21 can flow. The inlet opening and the outlet opening of the metering cylinder are preferably each provided with valves, for example check valves which, upon movement of the metering piston in the metering cylinder, convey the cleaning agent concentrate out of the concentrate line 24 in the supply line 21 cause.

Preferably, the volume between the piston and the metering cylinder, or the stroke transmitted from the piston of the hydraulic motor to the metering piston is adjustable to the delivery rate of the metering pump 23 to make adjustable.

Another possible embodiment of the hydraulic motor 22 provides that the hydraulic motor in the manner of a flow meter from the flow of fresh water in the supply line 21 has drivable intermeshing gears or splines that mechanically with the metering pump 23 are coupled. Accordingly, the metering pump 23 be executed in the form of a gear pump or with intermeshing splines to detergent concentrate from the reservoir 25 through the concentrate line 24 in the supply line 21 metered.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4335117 A1 [0002, 0003]

Claims (8)

Mobile machine ( 1 ) with a longitudinal central axis ( 1a ) for cleaning a road surface with one in the direction of travel of the machine ( 1 ) along the longitudinal central axis ( 1a ) front end ( 2 ) and a counter to the direction arranged rear ( 3 ), a rotatable first broom positionable adjacent to the road surface ( 10A . 10B ), a suction device ( 16 ) and one in the direction of travel in front of the suction device ( 14 ), with a water tank ( 12 ) connected first spraying device ( 15 ) for fresh water, characterized by a direction of travel in front of the first spraying device ( 15 ) arranged order device ( 20A . 20B ) for detergent solution over a section perpendicular to the longitudinal central axis ( 1a ), the arrangement of the first spraying device ( 15 ) over at least the portion perpendicular to the longitudinal central axis ( 1a ), through which the order establishment ( 20A . 20B ), the arrangement of the suction device ( 16 ) in the direction of travel after the first spraying device ( 15 ) over at least the portion perpendicular to the longitudinal central axis ( 1a ), through which the order establishment ( 20A . 20B ), wherein the applicator device ( 20A . 20B ) through a supply line ( 21 ) with a water tank ( 12 ) and with the supply line ( 21 ) one with a reservoir ( 25 ) concentrated concentrate line for detergent concentrate ( 24 ), one through one in the supply line ( 21 ) arranged hydraulic motor ( 22 ) driven metering pump ( 23 ) having. Machine according to claim 1, characterized in that the first broom ( 10A . 10B . 26 ) between the order device ( 20A . 20B ) and the spraying device ( 15 ) is arranged and over the portion perpendicular to the longitudinal central axis ( 1a ) over which the order device ( 20A . 20B ). Machine according to claim 1 or 2, characterized in that the application device ( 20A ) for detergent solution at the front end ( 2 ) and across the width of the machine ( 1 ) perpendicular to its longitudinal central axis ( 1a ). Machine according to one of claims 2 to 3, characterized in that the first broom ( 10A . 10B ) a about a vertically arranged axis of rotation rotatable pot broom ( 10A ), a about a horizontally arranged axis of rotation rotatable roller brush ( 10B ), or about a about vertically arranged axis of rotation rotatable cup broom ( 10A ) and one in the direction of the long axis ( 1a ) arranged spaced around an approximately horizontally disposed axis of rotation rotatable roller brush ( 10B ). Machine according to one of the preceding claims, characterized in that the suction device ( 16 ) one at the rear ( 3 ) arranged Heckabsaugung ( 16 ) which extends over at least the section perpendicular to the longitudinal central axis ( 1a ) over which the order device ( 20A . 20B ). Machine according to one of the preceding claims, characterized in that the first broom ( 10A . 10B ) in its discharge an additional suction device ( 14 ) assigned. Machine according to one of the preceding claims, characterized in that a second broom ( 26 ) in the direction of travel after the application device ( 20A . 20B ) is arranged over at least the portion perpendicular to the longitudinal central axis ( 1a ) over which the order device ( 20A . 20B ). Machine according to one of the preceding claims, characterized in that instead of the hydraulic motor ( 22 ) a water flow dependent electrical signal generating flow meter in the supply line ( 21 ) is arranged, and the metering pump is controlled depending on the electrical signal of the flowmeter.